--- /dev/null
+/**\r
+ * otg.c - DesignWare USB3 DRD Controller OTG\r
+ *\r
+ * Copyright (c) 2012, Code Aurora Forum. All rights reserved.\r
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.\r
+ * http://www.samsung.com\r
+ *\r
+ * Authors: Ido Shayevitz <idos@codeaurora.org>\r
+ * Anton Tikhomirov <av.tikhomirov@samsung.com>\r
+ * Minho Lee <minho55.lee@samsung.com>\r
+ *\r
+ * This program is free software: you can redistribute it and/or modify\r
+ * it under the terms of the GNU General Public License version 2 of\r
+ * the License as published by the Free Software Foundation.\r
+ *\r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ * GNU General Public License for more details.\r
+ */\r
+\r
+#include <linux/mutex.h>\r
+#include <linux/platform_device.h>\r
+#include <linux/regulator/consumer.h>\r
+#include <linux/pm_runtime.h>\r
+#include <linux/usb/samsung_usb.h>\r
+#include <linux/mfd/samsung/s2mps18-private.h>\r
+#ifdef CONFIG_EXYNOS_PD\r
+#include <soc/samsung/exynos-pm.h>\r
+#endif\r
+\r
+#include "core.h"\r
+#include "otg.h"\r
+#include "io.h"\r
+\r
+/* -------------------------------------------------------------------------- */\r
+int otg_connection;\r
+static int dwc3_otg_statemachine(struct otg_fsm *fsm)\r
+{\r
+ struct usb_otg *otg = fsm->otg;\r
+ enum usb_otg_state prev_state = otg->state;\r
+ int ret = 0;\r
+\r
+ if (fsm->reset) {\r
+ if (otg->state == OTG_STATE_A_HOST) {\r
+ otg_drv_vbus(fsm, 0);\r
+ otg_start_host(fsm, 0);\r
+ } else if (otg->state == OTG_STATE_B_PERIPHERAL) {\r
+ otg_start_gadget(fsm, 0);\r
+ }\r
+\r
+ otg->state = OTG_STATE_UNDEFINED;\r
+ goto exit;\r
+ }\r
+\r
+ switch (otg->state) {\r
+ case OTG_STATE_UNDEFINED:\r
+ if (fsm->id)\r
+ otg->state = OTG_STATE_B_IDLE;\r
+ else\r
+ otg->state = OTG_STATE_A_IDLE;\r
+ break;\r
+ case OTG_STATE_B_IDLE:\r
+ if (!fsm->id) {\r
+ otg->state = OTG_STATE_A_IDLE;\r
+ } else if (fsm->b_sess_vld) {\r
+ ret = otg_start_gadget(fsm, 1);\r
+ if (!ret)\r
+ otg->state = OTG_STATE_B_PERIPHERAL;\r
+ else\r
+ pr_err("OTG SM: cannot start gadget\n");\r
+ }\r
+ break;\r
+ case OTG_STATE_B_PERIPHERAL:\r
+ if (!fsm->id || !fsm->b_sess_vld) {\r
+ ret = otg_start_gadget(fsm, 0);\r
+ if (!ret)\r
+ otg->state = OTG_STATE_B_IDLE;\r
+ else\r
+ pr_err("OTG SM: cannot stop gadget\n");\r
+ }\r
+ break;\r
+ case OTG_STATE_A_IDLE:\r
+ if (fsm->id) {\r
+ otg->state = OTG_STATE_B_IDLE;\r
+ } else {\r
+ ret = otg_start_host(fsm, 1);\r
+ if (!ret) {\r
+ otg_drv_vbus(fsm, 1);\r
+ otg->state = OTG_STATE_A_HOST;\r
+ } else {\r
+ pr_err("OTG SM: cannot start host\n");\r
+ }\r
+ }\r
+ break;\r
+ case OTG_STATE_A_HOST:\r
+ if (fsm->id) {\r
+ otg_drv_vbus(fsm, 0);\r
+ ret = otg_start_host(fsm, 0);\r
+ if (!ret)\r
+ otg->state = OTG_STATE_A_IDLE;\r
+ else\r
+ pr_err("OTG SM: cannot stop host\n");\r
+ }\r
+ break;\r
+ default:\r
+ pr_err("OTG SM: invalid state\n");\r
+ }\r
+\r
+exit:\r
+ if (!ret)\r
+ ret = (otg->state != prev_state);\r
+\r
+ pr_debug("OTG SM: %s => %s\n", usb_otg_state_string(prev_state),\r
+ (ret > 0) ? usb_otg_state_string(otg->state) : "(no change)");\r
+\r
+ return ret;\r
+}\r
+\r
+/* -------------------------------------------------------------------------- */\r
+\r
+static struct dwc3_ext_otg_ops *dwc3_otg_exynos_rsw_probe(struct dwc3 *dwc)\r
+{\r
+ struct dwc3_ext_otg_ops *ops;\r
+ bool ext_otg;\r
+\r
+ ext_otg = dwc3_exynos_rsw_available(dwc->dev->parent);\r
+ if (!ext_otg)\r
+ return NULL;\r
+\r
+ /* Allocate and init otg instance */\r
+ ops = devm_kzalloc(dwc->dev, sizeof(struct dwc3_ext_otg_ops),\r
+ GFP_KERNEL);\r
+ if (!ops) {\r
+ dev_err(dwc->dev, "unable to allocate dwc3_ext_otg_ops\n");\r
+ return NULL;\r
+ }\r
+\r
+ ops->setup = dwc3_exynos_rsw_setup;\r
+ ops->exit = dwc3_exynos_rsw_exit;\r
+ ops->start = dwc3_exynos_rsw_start;\r
+ ops->stop = dwc3_exynos_rsw_stop;\r
+\r
+ return ops;\r
+}\r
+\r
+static void dwc3_otg_set_host_mode(struct dwc3_otg *dotg)\r
+{\r
+ struct dwc3 *dwc = dotg->dwc;\r
+ u32 reg;\r
+\r
+ if (dotg->regs) {\r
+ reg = dwc3_readl(dotg->regs, DWC3_OCTL);\r
+ reg &= ~DWC3_OTG_OCTL_PERIMODE;\r
+ dwc3_writel(dotg->regs, DWC3_OCTL, reg);\r
+ } else {\r
+ dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST);\r
+ }\r
+}\r
+\r
+static void dwc3_otg_set_peripheral_mode(struct dwc3_otg *dotg)\r
+{\r
+ struct dwc3 *dwc = dotg->dwc;\r
+ u32 reg;\r
+\r
+ if (dotg->regs) {\r
+ reg = dwc3_readl(dotg->regs, DWC3_OCTL);\r
+ reg |= DWC3_OTG_OCTL_PERIMODE;\r
+ dwc3_writel(dotg->regs, DWC3_OCTL, reg);\r
+ } else {\r
+ dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);\r
+ }\r
+}\r
+\r
+static void dwc3_otg_drv_vbus(struct otg_fsm *fsm, int on)\r
+{\r
+ struct dwc3_otg *dotg = container_of(fsm, struct dwc3_otg, fsm);\r
+ int ret;\r
+\r
+ if (IS_ERR(dotg->vbus_reg)) {\r
+ dev_err(dotg->dwc->dev, "vbus regulator is not available\n");\r
+ return;\r
+ }\r
+\r
+ if (on)\r
+ ret = regulator_enable(dotg->vbus_reg);\r
+ else\r
+ ret = regulator_disable(dotg->vbus_reg);\r
+\r
+ if (ret)\r
+ dev_err(dotg->dwc->dev, "failed to turn Vbus %s\n",\r
+ on ? "on" : "off");\r
+}\r
+\r
+static void dwc3_otg_ldo_control(struct otg_fsm *fsm, int on)\r
+{\r
+#if defined(OTG_LDO_CONTROL_ENABLED)\r
+ struct usb_otg *otg = fsm->otg;\r
+ struct dwc3_otg *dotg = container_of(otg, struct dwc3_otg, otg);\r
+ struct device *dev = dotg->dwc->dev;\r
+ int i;\r
+\r
+ dev_info(dev, "Turn %s LDO\n", on ? "on" : "off");\r
+\r
+ if (on) {\r
+ for (i = 0; i < dotg->ldos; i++)\r
+ s2m_ldo_set_mode(dotg->ldo_num[i], 0x3);\r
+ } else {\r
+ for (i = 0; i < dotg->ldos; i++)\r
+ s2m_ldo_set_mode(dotg->ldo_num[i], 0x1);\r
+ }\r
+#endif\r
+\r
+ return;\r
+}\r
+static int dwc3_otg_start_host(struct otg_fsm *fsm, int on)\r
+{\r
+ struct usb_otg *otg = fsm->otg;\r
+ struct dwc3_otg *dotg = container_of(otg, struct dwc3_otg, otg);\r
+ struct dwc3 *dwc = dotg->dwc;\r
+ struct device *dev = dotg->dwc->dev;\r
+ int ret = 0;\r
+\r
+ if (!dotg->dwc->xhci) {\r
+ dev_err(dev, "%s: does not have any xhci\n", __func__);\r
+ return -EINVAL;\r
+ }\r
+\r
+ dev_info(dev, "Turn %s host\n", on ? "on" : "off");\r
+ if (on) {\r
+ otg_connection = 1;\r
+ dwc3_otg_ldo_control(fsm, 1);\r
+ pm_runtime_get_sync(dev);\r
+ ret = dwc3_phy_setup(dwc);\r
+ if (ret) {\r
+ dev_err(dwc->dev, "%s: failed to setup phy\n",\r
+ __func__);\r
+ goto err1;\r
+ }\r
+ ret = dwc3_core_init(dwc);\r
+ if (ret) {\r
+ dev_err(dwc->dev, "%s: failed to reinitialize core\n",\r
+ __func__);\r
+ goto err1;\r
+ }\r
+\r
+ phy_conn(dwc->usb2_generic_phy, 1);\r
+\r
+ /**\r
+ * In case there is not a resistance to detect VBUS,\r
+ * DP/DM controls by S/W are needed at this point.\r
+ */\r
+ if (dwc->is_not_vbus_pad) {\r
+ phy_set(dwc->usb2_generic_phy,\r
+ SET_DPDM_PULLDOWN, NULL);\r
+ phy_set(dwc->usb3_generic_phy,\r
+ SET_DPDM_PULLDOWN, NULL);\r
+ }\r
+\r
+ dwc3_otg_set_host_mode(dotg);\r
+ ret = platform_device_add(dwc->xhci);\r
+ if (ret) {\r
+ dev_err(dev, "%s: cannot add xhci\n", __func__);\r
+ goto err2;\r
+ }\r
+ } else {\r
+ otg_connection = 0;\r
+ platform_device_del(dwc->xhci);\r
+err2:\r
+ phy_conn(dwc->usb2_generic_phy, 0);\r
+\r
+ dwc3_core_exit(dwc);\r
+err1:\r
+ pm_runtime_put_sync(dev);\r
+ dwc3_otg_ldo_control(fsm, 0);\r
+ }\r
+\r
+ return ret;\r
+}\r
+\r
+static int dwc3_otg_start_gadget(struct otg_fsm *fsm, int on)\r
+{\r
+ struct usb_otg *otg = fsm->otg;\r
+ struct dwc3_otg *dotg = container_of(otg, struct dwc3_otg, otg);\r
+ struct dwc3 *dwc = dotg->dwc;\r
+ struct device *dev = dotg->dwc->dev;\r
+ int ret = 0;\r
+\r
+ if (!otg->gadget) {\r
+ dev_err(dev, "%s does not have any gadget\n", __func__);\r
+ return -EINVAL;\r
+ }\r
+\r
+ dev_info(dev, "Turn %s gadget %s\n",\r
+ on ? "on" : "off", otg->gadget->name);\r
+\r
+ if (on) {\r
+ wake_lock(&dotg->wakelock);\r
+ ret = pm_runtime_get_sync(dev);\r
+ dev_info(dev, "%s pm_runtime_get_sync = %d\n",\r
+ __func__, ret);\r
+ ret = dwc3_phy_setup(dwc);\r
+ if (ret) {\r
+ dev_err(dwc->dev, "%s: failed to setup phy\n",\r
+ __func__);\r
+ goto err1;\r
+ }\r
+\r
+ ret = dwc3_core_init(dwc);\r
+ if (ret) {\r
+ dev_err(dwc->dev, "%s: failed to reinitialize core\n",\r
+ __func__);\r
+ goto err1;\r
+ }\r
+\r
+ dwc3_otg_set_peripheral_mode(dotg);\r
+ ret = usb_gadget_vbus_connect(otg->gadget);\r
+ if (ret) {\r
+ dev_err(dwc->dev, "%s: vbus connect failed\n",\r
+ __func__);\r
+ goto err2;\r
+ }\r
+\r
+ } else {\r
+ if (dwc->is_not_vbus_pad)\r
+ dwc3_gadget_disconnect_proc(dwc);\r
+ /* avoid missing disconnect interrupt */\r
+ ret = wait_for_completion_timeout(&dwc->disconnect,\r
+ msecs_to_jiffies(200));\r
+ if (!ret) {\r
+ dev_err(dwc->dev, "%s: disconnect completion timeout\n",\r
+ __func__);\r
+ return ret;\r
+ }\r
+ ret = usb_gadget_vbus_disconnect(otg->gadget);\r
+ if (ret)\r
+ dev_err(dwc->dev, "%s: vbus disconnect failed\n",\r
+ __func__);\r
+err2:\r
+ dwc3_core_exit(dwc);\r
+err1:\r
+ pm_runtime_put_sync(dev);\r
+ wake_unlock(&dotg->wakelock);\r
+ }\r
+\r
+ return ret;\r
+}\r
+\r
+static struct otg_fsm_ops dwc3_otg_fsm_ops = {\r
+ .drv_vbus = dwc3_otg_drv_vbus,\r
+ .start_host = dwc3_otg_start_host,\r
+ .start_gadget = dwc3_otg_start_gadget,\r
+};\r
+\r
+/* -------------------------------------------------------------------------- */\r
+\r
+void dwc3_otg_run_sm(struct otg_fsm *fsm)\r
+{\r
+ struct dwc3_otg *dotg = container_of(fsm, struct dwc3_otg, fsm);\r
+ int state_changed;\r
+\r
+ /* Prevent running SM on early system resume */\r
+ if (!dotg->ready)\r
+ return;\r
+\r
+ mutex_lock(&fsm->lock);\r
+\r
+ do {\r
+ state_changed = dwc3_otg_statemachine(fsm);\r
+ } while (state_changed > 0);\r
+\r
+ mutex_unlock(&fsm->lock);\r
+}\r
+\r
+/* Bind/Unbind the peripheral controller driver */\r
+static int dwc3_otg_set_peripheral(struct usb_otg *otg,\r
+ struct usb_gadget *gadget)\r
+{\r
+ struct dwc3_otg *dotg = container_of(otg, struct dwc3_otg, otg);\r
+ struct otg_fsm *fsm = &dotg->fsm;\r
+ struct device *dev = dotg->dwc->dev;\r
+\r
+ if (gadget) {\r
+ dev_info(dev, "Binding gadget %s\n", gadget->name);\r
+\r
+ otg->gadget = gadget;\r
+ } else {\r
+ dev_info(dev, "Unbinding gadget\n");\r
+\r
+ mutex_lock(&fsm->lock);\r
+\r
+ if (otg->state == OTG_STATE_B_PERIPHERAL) {\r
+ /* Reset OTG Statemachine */\r
+ fsm->reset = 1;\r
+ dwc3_otg_statemachine(fsm);\r
+ fsm->reset = 0;\r
+ }\r
+ otg->gadget = NULL;\r
+\r
+ mutex_unlock(&fsm->lock);\r
+\r
+ dwc3_otg_run_sm(fsm);\r
+ }\r
+\r
+ return 0;\r
+}\r
+\r
+static int dwc3_otg_get_id_state(struct dwc3_otg *dotg)\r
+{\r
+ u32 reg = dwc3_readl(dotg->regs, DWC3_OSTS);\r
+\r
+ return !!(reg & DWC3_OTG_OSTS_CONIDSTS);\r
+}\r
+\r
+static int dwc3_otg_get_b_sess_state(struct dwc3_otg *dotg)\r
+{\r
+ u32 reg = dwc3_readl(dotg->regs, DWC3_OSTS);\r
+\r
+ return !!(reg & DWC3_OTG_OSTS_BSESVALID);\r
+}\r
+\r
+static irqreturn_t dwc3_otg_interrupt(int irq, void *_dotg)\r
+{\r
+ struct dwc3_otg *dotg = (struct dwc3_otg *)_dotg;\r
+ struct otg_fsm *fsm = &dotg->fsm;\r
+ u32 oevt, handled_events = 0;\r
+ irqreturn_t ret = IRQ_NONE;\r
+\r
+ oevt = dwc3_readl(dotg->regs, DWC3_OEVT);\r
+\r
+ /* ID */\r
+ if (oevt & DWC3_OEVTEN_OTGCONIDSTSCHNGEVNT) {\r
+ fsm->id = dwc3_otg_get_id_state(dotg);\r
+ handled_events |= DWC3_OEVTEN_OTGCONIDSTSCHNGEVNT;\r
+ }\r
+\r
+ /* VBus */\r
+ if (oevt & DWC3_OEVTEN_OTGBDEVVBUSCHNGEVNT) {\r
+ fsm->b_sess_vld = dwc3_otg_get_b_sess_state(dotg);\r
+ handled_events |= DWC3_OEVTEN_OTGBDEVVBUSCHNGEVNT;\r
+ }\r
+\r
+ if (handled_events) {\r
+ dwc3_writel(dotg->regs, DWC3_OEVT, handled_events);\r
+ ret = IRQ_WAKE_THREAD;\r
+ }\r
+\r
+ return ret;\r
+}\r
+\r
+static irqreturn_t dwc3_otg_thread_interrupt(int irq, void *_dotg)\r
+{\r
+ struct dwc3_otg *dotg = (struct dwc3_otg *)_dotg;\r
+\r
+ dwc3_otg_run_sm(&dotg->fsm);\r
+\r
+ return IRQ_HANDLED;\r
+}\r
+\r
+static void dwc3_otg_enable_irq(struct dwc3_otg *dotg)\r
+{\r
+ /* Enable only connector ID status & VBUS change events */\r
+ dwc3_writel(dotg->regs, DWC3_OEVTEN,\r
+ DWC3_OEVTEN_OTGCONIDSTSCHNGEVNT |\r
+ DWC3_OEVTEN_OTGBDEVVBUSCHNGEVNT);\r
+}\r
+\r
+static void dwc3_otg_disable_irq(struct dwc3_otg *dotg)\r
+{\r
+ dwc3_writel(dotg->regs, DWC3_OEVTEN, 0x0);\r
+}\r
+\r
+static void dwc3_otg_reset(struct dwc3_otg *dotg)\r
+{\r
+ /*\r
+ * OCFG[2] - OTG-Version = 0\r
+ * OCFG[1] - HNPCap = 0\r
+ * OCFG[0] - SRPCap = 0\r
+ */\r
+ dwc3_writel(dotg->regs, DWC3_OCFG, 0x0);\r
+\r
+ /*\r
+ * OCTL[6] - PeriMode = 1\r
+ * OCTL[5] - PrtPwrCtl = 0\r
+ * OCTL[4] - HNPReq = 0\r
+ * OCTL[3] - SesReq = 0\r
+ * OCTL[2] - TermSelDLPulse = 0\r
+ * OCTL[1] - DevSetHNPEn = 0\r
+ * OCTL[0] - HstSetHNPEn = 0\r
+ */\r
+ dwc3_writel(dotg->regs, DWC3_OCTL, DWC3_OTG_OCTL_PERIMODE);\r
+\r
+ /* Clear all otg events (interrupts) indications */\r
+ dwc3_writel(dotg->regs, DWC3_OEVT, DWC3_OEVT_CLEAR_ALL);\r
+}\r
+\r
+/* -------------------------------------------------------------------------- */\r
+\r
+static ssize_t\r
+dwc3_otg_show_state(struct device *dev,\r
+ struct device_attribute *attr, char *buf)\r
+{\r
+ struct dwc3 *dwc = dev_get_drvdata(dev);\r
+ struct usb_otg *otg = &dwc->dotg->otg;\r
+\r
+ return snprintf(buf, PAGE_SIZE, "%s\n",\r
+ usb_otg_state_string(otg->state));\r
+}\r
+\r
+static DEVICE_ATTR(state, S_IRUSR | S_IRGRP,\r
+ dwc3_otg_show_state, NULL);\r
+\r
+static ssize_t\r
+dwc3_otg_show_b_sess(struct device *dev,\r
+ struct device_attribute *attr, char *buf)\r
+{\r
+ struct dwc3 *dwc = dev_get_drvdata(dev);\r
+ struct otg_fsm *fsm = &dwc->dotg->fsm;\r
+\r
+ return snprintf(buf, PAGE_SIZE, "%d\n", fsm->b_sess_vld);\r
+}\r
+\r
+static ssize_t\r
+dwc3_otg_store_b_sess(struct device *dev,\r
+ struct device_attribute *attr, const char *buf, size_t n)\r
+{\r
+ struct dwc3 *dwc = dev_get_drvdata(dev);\r
+ struct otg_fsm *fsm = &dwc->dotg->fsm;\r
+ int b_sess_vld;\r
+\r
+ if (sscanf(buf, "%d", &b_sess_vld) != 1)\r
+ return -EINVAL;\r
+\r
+ fsm->b_sess_vld = !!b_sess_vld;\r
+\r
+ dwc3_otg_run_sm(fsm);\r
+\r
+ return n;\r
+}\r
+\r
+static DEVICE_ATTR(b_sess, S_IWUSR | S_IRUSR | S_IRGRP,\r
+ dwc3_otg_show_b_sess, dwc3_otg_store_b_sess);\r
+\r
+static ssize_t\r
+dwc3_otg_show_id(struct device *dev,\r
+ struct device_attribute *attr, char *buf)\r
+{\r
+ struct dwc3 *dwc = dev_get_drvdata(dev);\r
+ struct otg_fsm *fsm = &dwc->dotg->fsm;\r
+\r
+ return snprintf(buf, PAGE_SIZE, "%d\n", fsm->id);\r
+}\r
+\r
+static ssize_t\r
+dwc3_otg_store_id(struct device *dev,\r
+ struct device_attribute *attr, const char *buf, size_t n)\r
+{\r
+ struct dwc3 *dwc = dev_get_drvdata(dev);\r
+ struct otg_fsm *fsm = &dwc->dotg->fsm;\r
+ int id;\r
+\r
+ if (sscanf(buf, "%d", &id) != 1)\r
+ return -EINVAL;\r
+\r
+ fsm->id = !!id;\r
+\r
+ dwc3_otg_run_sm(fsm);\r
+\r
+ return n;\r
+}\r
+\r
+static DEVICE_ATTR(id, S_IWUSR | S_IRUSR | S_IRGRP,\r
+ dwc3_otg_show_id, dwc3_otg_store_id);\r
+\r
+static struct attribute *dwc3_otg_attributes[] = {\r
+ &dev_attr_id.attr,\r
+ &dev_attr_b_sess.attr,\r
+ &dev_attr_state.attr,\r
+ NULL\r
+};\r
+\r
+static const struct attribute_group dwc3_otg_attr_group = {\r
+ .attrs = dwc3_otg_attributes,\r
+};\r
+\r
+/**\r
+ * dwc3_otg_start\r
+ * @dwc: pointer to our controller context structure\r
+ */\r
+int dwc3_otg_start(struct dwc3 *dwc)\r
+{\r
+ struct dwc3_otg *dotg = dwc->dotg;\r
+ struct otg_fsm *fsm = &dotg->fsm;\r
+ int ret;\r
+\r
+ if (dotg->ext_otg_ops) {\r
+ ret = dwc3_ext_otg_start(dotg);\r
+ if (ret) {\r
+ dev_err(dwc->dev, "failed to start external OTG\n");\r
+ return ret;\r
+ }\r
+ } else {\r
+ dotg->regs = dwc->regs;\r
+\r
+ dwc3_otg_reset(dotg);\r
+\r
+ dotg->fsm.id = dwc3_otg_get_id_state(dotg);\r
+ dotg->fsm.b_sess_vld = dwc3_otg_get_b_sess_state(dotg);\r
+\r
+ dotg->irq = platform_get_irq(to_platform_device(dwc->dev), 0);\r
+ ret = devm_request_threaded_irq(dwc->dev, dotg->irq,\r
+ dwc3_otg_interrupt,\r
+ dwc3_otg_thread_interrupt,\r
+ IRQF_SHARED, "dwc3-otg", dotg);\r
+ if (ret) {\r
+ dev_err(dwc->dev, "failed to request irq #%d --> %d\n",\r
+ dotg->irq, ret);\r
+ return ret;\r
+ }\r
+\r
+ dwc3_otg_enable_irq(dotg);\r
+ }\r
+\r
+ dotg->ready = 1;\r
+\r
+ dwc3_otg_run_sm(fsm);\r
+\r
+ return 0;\r
+}\r
+\r
+/**\r
+ * dwc3_otg_stop\r
+ * @dwc: pointer to our controller context structure\r
+ */\r
+void dwc3_otg_stop(struct dwc3 *dwc)\r
+{\r
+ struct dwc3_otg *dotg = dwc->dotg;\r
+\r
+ if (dotg->ext_otg_ops) {\r
+ dwc3_ext_otg_stop(dotg);\r
+ } else {\r
+ dwc3_otg_disable_irq(dotg);\r
+ free_irq(dotg->irq, dotg);\r
+ }\r
+\r
+ dotg->ready = 0;\r
+}\r
+\r
+/* -------------------------------------------------------------------------- */\r
+bool otg_is_connect(void)\r
+{\r
+ if (otg_connection)\r
+ return true;\r
+ else\r
+ return false;\r
+}\r
+EXPORT_SYMBOL_GPL(otg_is_connect);\r
+\r
+int dwc3_otg_init(struct dwc3 *dwc)\r
+{\r
+ struct dwc3_otg *dotg;\r
+ struct dwc3_ext_otg_ops *ops = NULL;\r
+ int ret = 0;\r
+\r
+ dev_info(dwc->dev, "%s\n", __func__);\r
+\r
+ /* EXYNOS SoCs don't have HW OTG, but support SW OTG. */\r
+ ops = dwc3_otg_exynos_rsw_probe(dwc);\r
+ if (!ops)\r
+ return 0;\r
+\r
+ /* Allocate and init otg instance */\r
+ dotg = devm_kzalloc(dwc->dev, sizeof(struct dwc3_otg), GFP_KERNEL);\r
+ if (!dotg) {\r
+ dev_err(dwc->dev, "unable to allocate dwc3_otg\n");\r
+ return -ENOMEM;\r
+ }\r
+\r
+ /* This reference is used by dwc3 modules for checking otg existance */\r
+ dwc->dotg = dotg;\r
+ dotg->dwc = dwc;\r
+\r
+ ret = of_property_read_u32(dwc->dev->of_node,"ldos", &dotg->ldos);\r
+ if (ret < 0) {\r
+ dev_err(dwc->dev, "can't get ldo information\n");\r
+ return -EINVAL;\r
+ } else {\r
+ if (dotg->ldos) {\r
+ dev_info(dwc->dev, "have %d LDOs for supporting USB L2 suspend \n", dotg->ldos);\r
+ dotg->ldo_num = (int *)devm_kmalloc(dwc->dev, sizeof(int) * (dotg->ldos),\r
+ GFP_KERNEL);\r
+ ret = of_property_read_u32_array(dwc->dev->of_node,\r
+ "ldo_number", dotg->ldo_num, dotg->ldos);\r
+ } else {\r
+ dev_info(dwc->dev, "don't have LDOs for supporting USB L2 suspend \n");\r
+ }\r
+ }\r
+\r
+ dotg->ext_otg_ops = ops;\r
+\r
+ dotg->otg.set_peripheral = dwc3_otg_set_peripheral;\r
+ dotg->otg.set_host = NULL;\r
+\r
+ dotg->otg.state = OTG_STATE_UNDEFINED;\r
+\r
+ mutex_init(&dotg->fsm.lock);\r
+ dotg->fsm.ops = &dwc3_otg_fsm_ops;\r
+ dotg->fsm.otg = &dotg->otg;\r
+\r
+ dotg->vbus_reg = devm_regulator_get(dwc->dev->parent, "dwc3-vbus");\r
+ if (IS_ERR(dotg->vbus_reg))\r
+ dev_err(dwc->dev, "failed to obtain vbus regulator\n");\r
+\r
+ if (dotg->ext_otg_ops) {\r
+ ret = dwc3_ext_otg_setup(dotg);\r
+ if (ret) {\r
+ dev_err(dwc->dev, "failed to setup OTG\n");\r
+ return ret;\r
+ }\r
+ }\r
+\r
+ wake_lock_init(&dotg->wakelock, WAKE_LOCK_SUSPEND, "dwc3-otg");\r
+\r
+ ret = sysfs_create_group(&dwc->dev->kobj, &dwc3_otg_attr_group);\r
+ if (ret)\r
+ dev_err(dwc->dev, "failed to create dwc3 otg attributes\n");\r
+\r
+#ifdef CONFIG_SOC_EXYNOS9810\r
+ register_usb_is_connect(NULL);\r
+#endif\r
+\r
+ return 0;\r
+}\r
+\r
+void dwc3_otg_exit(struct dwc3 *dwc)\r
+{\r
+ struct dwc3_otg *dotg = dwc->dotg;\r
+\r
+ if (!dotg->ext_otg_ops)\r
+ return;\r
+\r
+ dwc3_ext_otg_exit(dotg);\r
+\r
+ sysfs_remove_group(&dwc->dev->kobj, &dwc3_otg_attr_group);\r
+ wake_lock_destroy(&dotg->wakelock);\r
+ free_irq(dotg->irq, dotg);\r
+ dotg->otg.state = OTG_STATE_UNDEFINED;\r
+ kfree(dotg);\r
+ dwc->dotg = NULL;\r
+}\r
--- /dev/null
+/**\r
+ * otg.c - DesignWare USB3 DRD Controller OTG\r
+ *\r
+ * Copyright (c) 2012, Code Aurora Forum. All rights reserved.\r
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.\r
+ * http://www.samsung.com\r
+ *\r
+ * Authors: Ido Shayevitz <idos@codeaurora.org>\r
+ * Anton Tikhomirov <av.tikhomirov@samsung.com>\r
+ *\r
+ * This program is free software: you can redistribute it and/or modify\r
+ * it under the terms of the GNU General Public License version 2 of\r
+ * the License as published by the Free Software Foundation.\r
+ *\r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ * GNU General Public License for more details.\r
+ */\r
+\r
+#ifndef __LINUX_USB_DWC3_OTG_H\r
+#define __LINUX_USB_DWC3_OTG_H\r
+#include <linux/wakelock.h>\r
+#include <linux/usb/otg-fsm.h>\r
+\r
+struct dwc3_ext_otg_ops {\r
+ int (*setup)(struct device *dev, struct otg_fsm *fsm);\r
+ void (*exit)(struct device *dev);\r
+ int (*start) (struct device *dev);\r
+ void (*stop)(struct device *dev);\r
+};\r
+\r
+/**\r
+ * struct dwc3_otg: OTG driver data. Shared by HCD and DCD.\r
+ * @otg: USB OTG Transceiver structure.\r
+ * @fsm: OTG Final State Machine.\r
+ * @dwc: pointer to our controller context structure.\r
+ * @irq: IRQ number assigned for HSUSB controller.\r
+ * @regs: ioremapped register base address.\r
+ * @wakelock: prevents the system from entering suspend while\r
+ * host or peripheral mode is active.\r
+ * @vbus_reg: Vbus regulator.\r
+ * @ready: is one when OTG is ready for operation.\r
+ * @ext_otg_ops: external OTG engine ops.\r
+ */\r
+struct dwc3_otg {\r
+ struct usb_otg otg;\r
+ struct otg_fsm fsm;\r
+ struct dwc3 *dwc;\r
+ int irq;\r
+ void __iomem *regs;\r
+ struct wake_lock wakelock;\r
+\r
+ unsigned ready:1;\r
+ int otg_connection;\r
+\r
+ struct regulator *vbus_reg;\r
+ int *ldo_num;\r
+ int ldos;\r
+\r
+ struct dwc3_ext_otg_ops *ext_otg_ops;\r
+};\r
+\r
+static inline int dwc3_ext_otg_setup(struct dwc3_otg *dotg)\r
+{\r
+ struct device *dev = dotg->dwc->dev->parent;\r
+\r
+ if (!dotg->ext_otg_ops->setup)\r
+ return -EOPNOTSUPP;\r
+ return dotg->ext_otg_ops->setup(dev, &dotg->fsm);\r
+}\r
+\r
+static inline int dwc3_ext_otg_exit(struct dwc3_otg *dotg)\r
+{\r
+ struct device *dev = dotg->dwc->dev->parent;\r
+\r
+ if (!dotg->ext_otg_ops->exit)\r
+ return -EOPNOTSUPP;\r
+ dotg->ext_otg_ops->exit(dev);\r
+ return 0;\r
+}\r
+\r
+static inline int dwc3_ext_otg_start(struct dwc3_otg *dotg)\r
+{\r
+ struct device *dev = dotg->dwc->dev->parent;\r
+\r
+ if (!dotg->ext_otg_ops->start)\r
+ return -EOPNOTSUPP;\r
+ return dotg->ext_otg_ops->start(dev);\r
+}\r
+\r
+static inline int dwc3_ext_otg_stop(struct dwc3_otg *dotg)\r
+{\r
+ struct device *dev = dotg->dwc->dev->parent;\r
+\r
+ if (!dotg->ext_otg_ops->stop)\r
+ return -EOPNOTSUPP;\r
+ dotg->ext_otg_ops->stop(dev);\r
+ return 0;\r
+}\r
+\r
+bool dwc3_exynos_rsw_available(struct device *dev);\r
+int dwc3_exynos_rsw_setup(struct device *dev, struct otg_fsm *fsm);\r
+void dwc3_exynos_rsw_exit(struct device *dev);\r
+int dwc3_exynos_rsw_start(struct device *dev);\r
+void dwc3_exynos_rsw_stop(struct device *dev);\r
+\r
+#endif /* __LINUX_USB_DWC3_OTG_H */\r
--- /dev/null
+/*\r
+ * Gadget Driver for Android ADB\r
+ *\r
+ * Copyright (C) 2008 Google, Inc.\r
+ * Author: Mike Lockwood <lockwood@android.com>\r
+ *\r
+ * This software is licensed under the terms of the GNU General Public\r
+ * License version 2, as published by the Free Software Foundation, and\r
+ * may be copied, distributed, and modified under those terms.\r
+ *\r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ */\r
+\r
+#include <linux/module.h>\r
+#include <linux/init.h>\r
+#include <linux/poll.h>\r
+#include <linux/delay.h>\r
+#include <linux/wait.h>\r
+#include <linux/err.h>\r
+#include <linux/interrupt.h>\r
+#include <linux/sched.h>\r
+#include <linux/types.h>\r
+#include <linux/device.h>\r
+#include <linux/miscdevice.h>\r
+#include <linux/configfs.h>\r
+#include <linux/usb/composite.h>\r
+\r
+#include "../configfs.h"\r
+\r
+#define ADB_BULK_BUFFER_SIZE 4096\r
+#define MAX_INST_NAME_LEN 40\r
+\r
+/* number of tx requests to allocate */\r
+#define TX_REQ_MAX 4\r
+\r
+static const char adb_shortname[] = "android_adb";\r
+\r
+struct adb_dev {\r
+ struct usb_function function;\r
+ struct usb_composite_dev *cdev;\r
+ spinlock_t lock;\r
+\r
+ struct usb_ep *ep_in;\r
+ struct usb_ep *ep_out;\r
+\r
+ int online;\r
+ int error;\r
+\r
+ atomic_t read_excl;\r
+ atomic_t write_excl;\r
+ atomic_t open_excl;\r
+\r
+ struct list_head tx_idle;\r
+\r
+ wait_queue_head_t read_wq;\r
+ wait_queue_head_t write_wq;\r
+ struct usb_request *rx_req;\r
+ int rx_done;\r
+};\r
+\r
+struct adb_instance {\r
+ const char *name;\r
+ struct usb_function_instance func_inst;\r
+ struct adb_dev *dev;\r
+};\r
+\r
+static struct usb_interface_descriptor adb_interface_desc = {\r
+ .bLength = USB_DT_INTERFACE_SIZE,\r
+ .bDescriptorType = USB_DT_INTERFACE,\r
+ .bInterfaceNumber = 0,\r
+ .bNumEndpoints = 2,\r
+ .bInterfaceClass = 0xFF,\r
+ .bInterfaceSubClass = 0x42,\r
+ .bInterfaceProtocol = 1,\r
+};\r
+\r
+static struct usb_endpoint_descriptor adb_superspeed_in_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_IN,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = __constant_cpu_to_le16(1024),\r
+};\r
+\r
+static struct usb_endpoint_descriptor adb_superspeed_out_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_OUT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = __constant_cpu_to_le16(1024),\r
+};\r
+\r
+static struct usb_ss_ep_comp_descriptor adb_superspeed_bulk_comp_desc = {\r
+ .bLength = sizeof adb_superspeed_bulk_comp_desc,\r
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,\r
+\r
+ /* the following 2 values can be tweaked if necessary */\r
+ /* .bMaxBurst = 0, */\r
+ /* .bmAttributes = 0, */\r
+};\r
+\r
+static struct usb_endpoint_descriptor adb_highspeed_in_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_IN,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = __constant_cpu_to_le16(512),\r
+};\r
+\r
+static struct usb_endpoint_descriptor adb_highspeed_out_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_OUT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = __constant_cpu_to_le16(512),\r
+};\r
+\r
+static struct usb_endpoint_descriptor adb_fullspeed_in_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_IN,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+};\r
+\r
+static struct usb_endpoint_descriptor adb_fullspeed_out_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_OUT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+};\r
+\r
+static struct usb_descriptor_header *fs_adb_descs[] = {\r
+ (struct usb_descriptor_header *) &adb_interface_desc,\r
+ (struct usb_descriptor_header *) &adb_fullspeed_in_desc,\r
+ (struct usb_descriptor_header *) &adb_fullspeed_out_desc,\r
+ NULL,\r
+};\r
+\r
+static struct usb_descriptor_header *hs_adb_descs[] = {\r
+ (struct usb_descriptor_header *) &adb_interface_desc,\r
+ (struct usb_descriptor_header *) &adb_highspeed_in_desc,\r
+ (struct usb_descriptor_header *) &adb_highspeed_out_desc,\r
+ NULL,\r
+};\r
+\r
+static struct usb_descriptor_header *ss_adb_descs[] = {\r
+ (struct usb_descriptor_header *) &adb_interface_desc,\r
+ (struct usb_descriptor_header *) &adb_superspeed_in_desc,\r
+ (struct usb_descriptor_header *) &adb_superspeed_bulk_comp_desc,\r
+ (struct usb_descriptor_header *) &adb_superspeed_out_desc,\r
+ (struct usb_descriptor_header *) &adb_superspeed_bulk_comp_desc,\r
+ NULL,\r
+};\r
+\r
+#ifndef CONFIG_USB_CONFIGFS_UEVENT\r
+static void adb_ready_callback(void);\r
+static void adb_closed_callback(void);\r
+#endif\r
+\r
+/* temporary variable used between adb_open() and adb_gadget_bind() */\r
+static struct adb_dev *_adb_dev;\r
+\r
+static inline struct adb_dev *func_to_adb(struct usb_function *f)\r
+{\r
+ return container_of(f, struct adb_dev, function);\r
+}\r
+\r
+\r
+static struct usb_request *adb_request_new(struct usb_ep *ep, int buffer_size)\r
+{\r
+ struct usb_request *req = usb_ep_alloc_request(ep, GFP_KERNEL);\r
+ if (!req)\r
+ return NULL;\r
+\r
+ /* now allocate buffers for the requests */\r
+ req->buf = kmalloc(buffer_size, GFP_KERNEL);\r
+ if (!req->buf) {\r
+ usb_ep_free_request(ep, req);\r
+ return NULL;\r
+ }\r
+\r
+ return req;\r
+}\r
+\r
+static void adb_request_free(struct usb_request *req, struct usb_ep *ep)\r
+{\r
+ if (req) {\r
+ kfree(req->buf);\r
+ usb_ep_free_request(ep, req);\r
+ }\r
+}\r
+\r
+static inline int adb_lock(atomic_t *excl)\r
+{\r
+ if (atomic_inc_return(excl) == 1) {\r
+ return 0;\r
+ } else {\r
+ atomic_dec(excl);\r
+ return -1;\r
+ }\r
+}\r
+\r
+static inline void adb_unlock(atomic_t *excl)\r
+{\r
+ atomic_dec(excl);\r
+}\r
+\r
+/* add a request to the tail of a list */\r
+void adb_req_put(struct adb_dev *dev, struct list_head *head,\r
+ struct usb_request *req)\r
+{\r
+ unsigned long flags;\r
+\r
+ spin_lock_irqsave(&dev->lock, flags);\r
+ list_add_tail(&req->list, head);\r
+ spin_unlock_irqrestore(&dev->lock, flags);\r
+}\r
+\r
+/* remove a request from the head of a list */\r
+struct usb_request *adb_req_get(struct adb_dev *dev, struct list_head *head)\r
+{\r
+ unsigned long flags;\r
+ struct usb_request *req;\r
+\r
+ spin_lock_irqsave(&dev->lock, flags);\r
+ if (list_empty(head)) {\r
+ req = 0;\r
+ } else {\r
+ req = list_first_entry(head, struct usb_request, list);\r
+ list_del(&req->list);\r
+ }\r
+ spin_unlock_irqrestore(&dev->lock, flags);\r
+ return req;\r
+}\r
+\r
+static void adb_complete_in(struct usb_ep *ep, struct usb_request *req)\r
+{\r
+ struct adb_dev *dev = _adb_dev;\r
+\r
+ if (req->status != 0)\r
+ dev->error = 1;\r
+\r
+ adb_req_put(dev, &dev->tx_idle, req);\r
+\r
+ wake_up(&dev->write_wq);\r
+}\r
+\r
+static void adb_complete_out(struct usb_ep *ep, struct usb_request *req)\r
+{\r
+ struct adb_dev *dev = _adb_dev;\r
+\r
+ dev->rx_done = 1;\r
+ if (req->status != 0 && req->status != -ECONNRESET)\r
+ dev->error = 1;\r
+\r
+ wake_up(&dev->read_wq);\r
+}\r
+\r
+static int adb_create_bulk_endpoints(struct adb_dev *dev,\r
+ struct usb_endpoint_descriptor *in_desc,\r
+ struct usb_endpoint_descriptor *out_desc)\r
+{\r
+ struct usb_composite_dev *cdev = dev->cdev;\r
+ struct usb_request *req;\r
+ struct usb_ep *ep;\r
+ int i;\r
+\r
+ DBG(cdev, "create_bulk_endpoints dev: %p\n", dev);\r
+\r
+ ep = usb_ep_autoconfig(cdev->gadget, in_desc);\r
+ if (!ep) {\r
+ DBG(cdev, "usb_ep_autoconfig for ep_in failed\n");\r
+ return -ENODEV;\r
+ }\r
+ DBG(cdev, "usb_ep_autoconfig for ep_in got %s\n", ep->name);\r
+ ep->driver_data = dev; /* claim the endpoint */\r
+ dev->ep_in = ep;\r
+\r
+ ep = usb_ep_autoconfig(cdev->gadget, out_desc);\r
+ if (!ep) {\r
+ DBG(cdev, "usb_ep_autoconfig for ep_out failed\n");\r
+ return -ENODEV;\r
+ }\r
+ DBG(cdev, "usb_ep_autoconfig for adb ep_out got %s\n", ep->name);\r
+ ep->driver_data = dev; /* claim the endpoint */\r
+ dev->ep_out = ep;\r
+\r
+ /* now allocate requests for our endpoints */\r
+ req = adb_request_new(dev->ep_out, ADB_BULK_BUFFER_SIZE);\r
+ if (!req)\r
+ goto fail;\r
+ req->complete = adb_complete_out;\r
+ dev->rx_req = req;\r
+\r
+ for (i = 0; i < TX_REQ_MAX; i++) {\r
+ req = adb_request_new(dev->ep_in, ADB_BULK_BUFFER_SIZE);\r
+ if (!req)\r
+ goto fail;\r
+ req->complete = adb_complete_in;\r
+ adb_req_put(dev, &dev->tx_idle, req);\r
+ }\r
+\r
+ return 0;\r
+\r
+fail:\r
+ printk(KERN_ERR "adb_bind() could not allocate requests\n");\r
+ return -1;\r
+}\r
+\r
+static ssize_t adb_read(struct file *fp, char __user *buf,\r
+ size_t count, loff_t *pos)\r
+{\r
+ struct adb_dev *dev = fp->private_data;\r
+ struct usb_request *req;\r
+ int r = count, xfer;\r
+ int maxp;\r
+ int ret;\r
+\r
+ pr_debug("adb_read(%d)\n", (int)count);\r
+ if (!_adb_dev)\r
+ return -ENODEV;\r
+\r
+ if (adb_lock(&dev->read_excl))\r
+ return -EBUSY;\r
+\r
+ /* we will block until we're online */\r
+ while (!(dev->online || dev->error)) {\r
+ pr_debug("adb_read: waiting for online state\n");\r
+ ret = wait_event_interruptible(dev->read_wq,\r
+ (dev->online || dev->error));\r
+ if (ret < 0) {\r
+ adb_unlock(&dev->read_excl);\r
+ return ret;\r
+ }\r
+ }\r
+ if (dev->error) {\r
+ r = -EIO;\r
+ goto done;\r
+ }\r
+\r
+ maxp = usb_endpoint_maxp(dev->ep_out->desc);\r
+ count = round_up(count, maxp);\r
+\r
+ if (count > ADB_BULK_BUFFER_SIZE)\r
+ return -EINVAL;\r
+\r
+requeue_req:\r
+ /* queue a request */\r
+ req = dev->rx_req;\r
+ req->length = count;\r
+ dev->rx_done = 0;\r
+ ret = usb_ep_queue(dev->ep_out, req, GFP_ATOMIC);\r
+ if (ret < 0) {\r
+ pr_debug("adb_read: failed to queue req %p (%d)\n", req, ret);\r
+ r = -EIO;\r
+ dev->error = 1;\r
+ goto done;\r
+ } else {\r
+ pr_debug("rx %p queue\n", req);\r
+ }\r
+\r
+ /* wait for a request to complete */\r
+ ret = wait_event_interruptible(dev->read_wq, dev->rx_done);\r
+ if (ret < 0) {\r
+ if (ret != -ERESTARTSYS)\r
+ dev->error = 1;\r
+ r = ret;\r
+ usb_ep_dequeue(dev->ep_out, req);\r
+ goto done;\r
+ }\r
+ if (!dev->error) {\r
+ /* If we got a 0-len packet, throw it back and try again. */\r
+ if (req->actual == 0)\r
+ goto requeue_req;\r
+\r
+ pr_debug("rx %p %d\n", req, req->actual);\r
+ xfer = (req->actual < count) ? req->actual : count;\r
+ if (copy_to_user(buf, req->buf, xfer))\r
+ r = -EFAULT;\r
+\r
+ } else\r
+ r = -EIO;\r
+\r
+done:\r
+ adb_unlock(&dev->read_excl);\r
+ pr_debug("adb_read returning %d\n", r);\r
+ return r;\r
+}\r
+\r
+static ssize_t adb_write(struct file *fp, const char __user *buf,\r
+ size_t count, loff_t *pos)\r
+{\r
+ struct adb_dev *dev = fp->private_data;\r
+ struct usb_request *req = 0;\r
+ int r = count, xfer;\r
+ int ret;\r
+\r
+ if (!_adb_dev)\r
+ return -ENODEV;\r
+ pr_debug("adb_write(%d)\n", (int)count);\r
+\r
+ if (adb_lock(&dev->write_excl))\r
+ return -EBUSY;\r
+\r
+ while (count > 0) {\r
+ if (dev->error) {\r
+ pr_debug("adb_write dev->error\n");\r
+ r = -EIO;\r
+ break;\r
+ }\r
+\r
+ /* get an idle tx request to use */\r
+ req = 0;\r
+ ret = wait_event_interruptible(dev->write_wq,\r
+ (req = adb_req_get(dev, &dev->tx_idle)) || dev->error);\r
+\r
+ if (ret < 0) {\r
+ r = ret;\r
+ break;\r
+ }\r
+\r
+ if (req != 0) {\r
+ if (count > ADB_BULK_BUFFER_SIZE)\r
+ xfer = ADB_BULK_BUFFER_SIZE;\r
+ else\r
+ xfer = count;\r
+ if (copy_from_user(req->buf, buf, xfer)) {\r
+ r = -EFAULT;\r
+ break;\r
+ }\r
+\r
+ req->length = xfer;\r
+ ret = usb_ep_queue(dev->ep_in, req, GFP_ATOMIC);\r
+ if (ret < 0) {\r
+ pr_debug("adb_write: xfer error %d\n", ret);\r
+ dev->error = 1;\r
+ r = -EIO;\r
+ break;\r
+ }\r
+\r
+ buf += xfer;\r
+ count -= xfer;\r
+\r
+ /* zero this so we don't try to free it on error exit */\r
+ req = 0;\r
+ }\r
+ }\r
+\r
+ if (req)\r
+ adb_req_put(dev, &dev->tx_idle, req);\r
+\r
+ adb_unlock(&dev->write_excl);\r
+ pr_debug("adb_write returning %d\n", r);\r
+ return r;\r
+}\r
+\r
+static int adb_open(struct inode *ip, struct file *fp)\r
+{\r
+ pr_info("adb_open\n");\r
+ if (!_adb_dev)\r
+ return -ENODEV;\r
+\r
+ if (adb_lock(&_adb_dev->open_excl))\r
+ return -EBUSY;\r
+\r
+ fp->private_data = _adb_dev;\r
+\r
+ /* clear the error latch */\r
+ _adb_dev->error = 0;\r
+\r
+#ifndef CONFIG_USB_CONFIGFS_UEVENT\r
+ adb_ready_callback();\r
+#endif\r
+\r
+ return 0;\r
+}\r
+\r
+static int adb_release(struct inode *ip, struct file *fp)\r
+{\r
+ pr_info("adb_release\n");\r
+\r
+#ifndef CONFIG_USB_CONFIGFS_UEVENT\r
+ adb_closed_callback();\r
+#endif\r
+\r
+ adb_unlock(&_adb_dev->open_excl);\r
+ return 0;\r
+}\r
+\r
+/* file operations for ADB device /dev/android_adb */\r
+static const struct file_operations adb_fops = {\r
+ .owner = THIS_MODULE,\r
+ .read = adb_read,\r
+ .write = adb_write,\r
+ .open = adb_open,\r
+ .release = adb_release,\r
+};\r
+\r
+static struct miscdevice adb_device = {\r
+ .minor = MISC_DYNAMIC_MINOR,\r
+ .name = adb_shortname,\r
+ .fops = &adb_fops,\r
+};\r
+\r
+\r
+\r
+\r
+static int\r
+adb_function_bind(struct usb_configuration *c, struct usb_function *f)\r
+{\r
+ struct usb_composite_dev *cdev = c->cdev;\r
+ struct adb_dev *dev = func_to_adb(f);\r
+ int id;\r
+ int ret;\r
+\r
+ dev->cdev = cdev;\r
+ DBG(cdev, "adb_function_bind dev: %p\n", dev);\r
+\r
+ /* allocate interface ID(s) */\r
+ id = usb_interface_id(c, f);\r
+ if (id < 0)\r
+ return id;\r
+ adb_interface_desc.bInterfaceNumber = id;\r
+\r
+ /* allocate endpoints */\r
+ ret = adb_create_bulk_endpoints(dev, &adb_fullspeed_in_desc,\r
+ &adb_fullspeed_out_desc);\r
+ if (ret)\r
+ return ret;\r
+\r
+ /* support high speed hardware */\r
+ if (gadget_is_dualspeed(c->cdev->gadget)) {\r
+ adb_highspeed_in_desc.bEndpointAddress =\r
+ adb_fullspeed_in_desc.bEndpointAddress;\r
+ adb_highspeed_out_desc.bEndpointAddress =\r
+ adb_fullspeed_out_desc.bEndpointAddress;\r
+ }\r
+\r
+ /* support super speed hardware */\r
+ if (gadget_is_superspeed(c->cdev->gadget)) {\r
+ adb_superspeed_in_desc.bEndpointAddress =\r
+ adb_fullspeed_in_desc.bEndpointAddress;\r
+ adb_superspeed_out_desc.bEndpointAddress =\r
+ adb_fullspeed_out_desc.bEndpointAddress;\r
+ }\r
+\r
+ DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n",\r
+ gadget_is_superspeed(c->cdev->gadget) ? "super" :\r
+ gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",\r
+ f->name, dev->ep_in->name, dev->ep_out->name);\r
+ return 0;\r
+}\r
+\r
+static void\r
+adb_function_unbind(struct usb_configuration *c, struct usb_function *f)\r
+{\r
+ struct adb_dev *dev = func_to_adb(f);\r
+ struct usb_request *req;\r
+\r
+\r
+ dev->online = 0;\r
+ dev->error = 1;\r
+\r
+ wake_up(&dev->read_wq);\r
+\r
+ adb_request_free(dev->rx_req, dev->ep_out);\r
+ while ((req = adb_req_get(dev, &dev->tx_idle)))\r
+ adb_request_free(req, dev->ep_in);\r
+}\r
+\r
+static int adb_function_set_alt(struct usb_function *f,\r
+ unsigned intf, unsigned alt)\r
+{\r
+ struct adb_dev *dev = func_to_adb(f);\r
+ struct usb_composite_dev *cdev = f->config->cdev;\r
+ int ret;\r
+\r
+ DBG(cdev, "adb_function_set_alt intf: %d alt: %d\n", intf, alt);\r
+\r
+ ret = config_ep_by_speed(cdev->gadget, f, dev->ep_in);\r
+ if (ret)\r
+ return ret;\r
+\r
+ ret = usb_ep_enable(dev->ep_in);\r
+ if (ret)\r
+ return ret;\r
+\r
+ ret = config_ep_by_speed(cdev->gadget, f, dev->ep_out);\r
+ if (ret)\r
+ return ret;\r
+\r
+ ret = usb_ep_enable(dev->ep_out);\r
+ if (ret) {\r
+ usb_ep_disable(dev->ep_in);\r
+ return ret;\r
+ }\r
+ dev->online = 1;\r
+\r
+ /* readers may be blocked waiting for us to go online */\r
+ wake_up(&dev->read_wq);\r
+ return 0;\r
+}\r
+\r
+static void adb_function_disable(struct usb_function *f)\r
+{\r
+ struct adb_dev *dev = func_to_adb(f);\r
+ struct usb_composite_dev *cdev = dev->cdev;\r
+\r
+ DBG(cdev, "adb_function_disable cdev %p\n", cdev);\r
+ dev->online = 0;\r
+ dev->error = 1;\r
+ usb_ep_disable(dev->ep_in);\r
+ usb_ep_disable(dev->ep_out);\r
+\r
+ /* readers may be blocked waiting for us to go online */\r
+ wake_up(&dev->read_wq);\r
+\r
+ VDBG(cdev, "%s disabled\n", dev->function.name);\r
+}\r
+\r
+#ifndef CONFIG_USB_CONFIGFS_UEVENT\r
+static int adb_bind_config(struct usb_configuration *c)\r
+{\r
+ struct adb_dev *dev = _adb_dev;\r
+\r
+ printk(KERN_INFO "adb_bind_config\n");\r
+\r
+ dev->cdev = c->cdev;\r
+ dev->function.name = "adb";\r
+ dev->function.fs_descriptors = fs_adb_descs;\r
+ dev->function.hs_descriptors = hs_adb_descs;\r
+ dev->function.ss_descriptors = ss_adb_descs;\r
+ dev->function.bind = adb_function_bind;\r
+ dev->function.unbind = adb_function_unbind;\r
+ dev->function.set_alt = adb_function_set_alt;\r
+ dev->function.disable = adb_function_disable;\r
+\r
+ return usb_add_function(c, &dev->function);\r
+}\r
+#endif\r
+\r
+static int __adb_setup(struct adb_instance *fi_adb)\r
+{\r
+ struct adb_dev *dev;\r
+ int ret;\r
+\r
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);\r
+ if (!dev)\r
+ return -ENOMEM;\r
+\r
+ if (fi_adb != NULL)\r
+ fi_adb->dev = dev;\r
+\r
+ spin_lock_init(&dev->lock);\r
+\r
+ init_waitqueue_head(&dev->read_wq);\r
+ init_waitqueue_head(&dev->write_wq);\r
+\r
+ atomic_set(&dev->open_excl, 0);\r
+ atomic_set(&dev->read_excl, 0);\r
+ atomic_set(&dev->write_excl, 0);\r
+\r
+ INIT_LIST_HEAD(&dev->tx_idle);\r
+\r
+ _adb_dev = dev;\r
+\r
+ ret = misc_register(&adb_device);\r
+ if (ret)\r
+ goto err;\r
+\r
+ return 0;\r
+\r
+err:\r
+ kfree(dev);\r
+ printk(KERN_ERR "adb gadget driver failed to initialize\n");\r
+ return ret;\r
+}\r
+\r
+static int adb_setup_configfs(struct adb_instance *fi_adb)\r
+{\r
+ return __adb_setup(fi_adb);\r
+}\r
+\r
+#ifndef CONFIG_USB_CONFIGFS_UEVENT\r
+static int adb_setup(void)\r
+{\r
+ return __adb_setup(NULL);\r
+\r
+}\r
+#endif\r
+\r
+static void adb_cleanup(void)\r
+{\r
+ misc_deregister(&adb_device);\r
+\r
+ kfree(_adb_dev);\r
+ _adb_dev = NULL;\r
+}\r
+\r
+static struct adb_instance *to_adb_instance(struct config_item *item)\r
+{\r
+ return container_of(to_config_group(item), struct adb_instance,\r
+ func_inst.group);\r
+}\r
+\r
+static void adb_attr_release(struct config_item *item)\r
+{\r
+ struct adb_instance *fi_adb = to_adb_instance(item);\r
+ usb_put_function_instance(&fi_adb->func_inst);\r
+}\r
+\r
+static struct configfs_item_operations adb_item_ops = {\r
+ .release = adb_attr_release,\r
+};\r
+\r
+static struct config_item_type adb_func_type = {\r
+ .ct_item_ops = &adb_item_ops,\r
+ .ct_owner = THIS_MODULE,\r
+};\r
+\r
+static struct adb_instance *to_fi_adb(struct usb_function_instance *fi)\r
+{\r
+ return container_of(fi, struct adb_instance, func_inst);\r
+}\r
+\r
+static int adb_set_inst_name(struct usb_function_instance *fi,\r
+ const char *name)\r
+{\r
+ struct adb_instance *fi_adb;\r
+ char *ptr;\r
+ int name_len;\r
+\r
+ name_len = strlen(name) + 1;\r
+ if (name_len > MAX_INST_NAME_LEN)\r
+ return -ENAMETOOLONG;\r
+\r
+ ptr = kstrndup(name, name_len, GFP_KERNEL);\r
+ if (!ptr)\r
+ return -ENOMEM;\r
+\r
+ fi_adb = to_fi_adb(fi);\r
+ fi_adb->name = ptr;\r
+\r
+ return 0;\r
+}\r
+\r
+static void adb_free_inst(struct usb_function_instance *fi)\r
+{\r
+ struct adb_instance *fi_adb;\r
+\r
+ fi_adb = to_fi_adb(fi);\r
+ kfree(fi_adb->name);\r
+ adb_cleanup();\r
+ kfree(fi_adb);\r
+}\r
+\r
+struct usb_function_instance *alloc_inst_adb(bool adb_config)\r
+{\r
+ struct adb_instance *fi_adb;\r
+ int ret = 0;\r
+\r
+ fi_adb = kzalloc(sizeof(*fi_adb), GFP_KERNEL);\r
+ if (!fi_adb)\r
+ return ERR_PTR(-ENOMEM);\r
+ fi_adb->func_inst.set_inst_name = adb_set_inst_name;\r
+ fi_adb->func_inst.free_func_inst = adb_free_inst;\r
+\r
+ if (adb_config) {\r
+ ret = adb_setup_configfs(fi_adb);\r
+ if (ret) {\r
+ kfree(fi_adb);\r
+ pr_err("Error setting adb\n");\r
+ return ERR_PTR(ret);\r
+ }\r
+ } else\r
+ fi_adb->dev = _adb_dev;\r
+\r
+ config_group_init_type_name(&fi_adb->func_inst.group, "",\r
+ &adb_func_type);\r
+\r
+ return &fi_adb->func_inst;\r
+}\r
+EXPORT_SYMBOL_GPL(alloc_inst_adb);\r
+\r
+static struct usb_function_instance *adb_alloc_inst(void)\r
+{\r
+ return alloc_inst_adb(true);\r
+}\r
+\r
+static void adb_free(struct usb_function *f)\r
+{\r
+ /*NO-OP: no function specific resource allocation in adb_alloc*/\r
+}\r
+\r
+struct usb_function *function_alloc_adb(struct usb_function_instance *fi,\r
+ bool adb_config)\r
+{\r
+ struct adb_instance *fi_adb = to_fi_adb(fi);\r
+ struct adb_dev *dev = fi_adb->dev;\r
+\r
+ dev->function.name = "adb";\r
+\r
+ dev->function.fs_descriptors = fs_adb_descs;\r
+ dev->function.hs_descriptors = hs_adb_descs;\r
+ dev->function.ss_descriptors = ss_adb_descs;\r
+\r
+ dev->function.bind = adb_function_bind;\r
+ dev->function.unbind = adb_function_unbind;\r
+ dev->function.set_alt = adb_function_set_alt;\r
+ dev->function.disable = adb_function_disable;\r
+ dev->function.free_func = adb_free;\r
+\r
+ return &dev->function;\r
+}\r
+EXPORT_SYMBOL_GPL(function_alloc_adb);\r
+\r
+static struct usb_function *adb_alloc(struct usb_function_instance *fi)\r
+{\r
+ return function_alloc_adb(fi, true);\r
+}\r
+\r
+DECLARE_USB_FUNCTION_INIT(adb, adb_alloc_inst, adb_alloc);\r
+MODULE_LICENSE("GPL");\r
--- /dev/null
+/*\r
+ * f_dm.c - generic USB serial function driver\r
+ * modified from f_serial.c and f_diag.c\r
+ * ttyGS*\r
+ *\r
+ * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)\r
+ * Copyright (C) 2008 by David Brownell\r
+ * Copyright (C) 2008 by Nokia Corporation\r
+ *\r
+ * This software is distributed under the terms of the GNU General\r
+ * Public License ("GPL") as published by the Free Software Foundation,\r
+ * either version 2 of that License or (at your option) any later version.\r
+ */\r
+\r
+#include <linux/module.h>\r
+#include <linux/init.h>\r
+#include <linux/kernel.h>\r
+#include <linux/device.h>\r
+\r
+#include <linux/configfs.h>\r
+#include <linux/usb/composite.h>\r
+\r
+#include "../configfs.h"\r
+#include "u_serial.h"\r
+\r
+#define MAX_INST_NAME_LEN 40\r
+/* DM_PORT NUM : /dev/ttyGS* port number */\r
+#define DM_PORT_NUM 1\r
+/*\r
+ * This function packages a simple "generic serial" port with no real\r
+ * control mechanisms, just raw data transfer over two bulk endpoints.\r
+ *\r
+ * Because it's not standardized, this isn't as interoperable as the\r
+ * CDC ACM driver. However, for many purposes it's just as functional\r
+ * if you can arrange appropriate host side drivers.\r
+ */\r
+\r
+struct dm_descs {\r
+ struct usb_endpoint_descriptor *in;\r
+ struct usb_endpoint_descriptor *out;\r
+};\r
+\r
+struct f_dm {\r
+ struct gserial port;\r
+ u8 data_id;\r
+ u8 port_num;\r
+\r
+ struct dm_descs fs;\r
+ struct dm_descs hs;\r
+};\r
+\r
+static inline struct f_dm *func_to_dm(struct usb_function *f)\r
+{\r
+ return container_of(f, struct f_dm, port.func);\r
+}\r
+\r
+/*-------------------------------------------------------------------------*/\r
+\r
+/* interface descriptor: */\r
+static struct usb_interface_descriptor dm_interface_desc = {\r
+ .bLength = USB_DT_INTERFACE_SIZE,\r
+ .bDescriptorType = USB_DT_INTERFACE,\r
+ /* .bInterfaceNumber = DYNAMIC */\r
+ .bNumEndpoints = 2,\r
+ .bInterfaceClass = USB_CLASS_VENDOR_SPEC,\r
+ .bInterfaceSubClass = 0x10,\r
+ .bInterfaceProtocol = 0x01,\r
+ /* .iInterface = DYNAMIC */\r
+};\r
+\r
+/* full speed support: */\r
+\r
+static struct usb_endpoint_descriptor dm_fs_in_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_IN,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+};\r
+\r
+static struct usb_endpoint_descriptor dm_fs_out_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_OUT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+};\r
+\r
+static struct usb_descriptor_header *dm_fs_function[] = {\r
+ (struct usb_descriptor_header *) &dm_interface_desc,\r
+ (struct usb_descriptor_header *) &dm_fs_in_desc,\r
+ (struct usb_descriptor_header *) &dm_fs_out_desc,\r
+ NULL,\r
+};\r
+\r
+/* high speed support: */\r
+\r
+static struct usb_endpoint_descriptor dm_hs_in_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = __constant_cpu_to_le16(512),\r
+};\r
+\r
+static struct usb_endpoint_descriptor dm_hs_out_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = __constant_cpu_to_le16(512),\r
+};\r
+static struct usb_descriptor_header *dm_hs_function[] = {\r
+ (struct usb_descriptor_header *) &dm_interface_desc,\r
+ (struct usb_descriptor_header *) &dm_hs_in_desc,\r
+ (struct usb_descriptor_header *) &dm_hs_out_desc,\r
+ NULL,\r
+};\r
+\r
+static struct usb_endpoint_descriptor dm_ss_in_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = cpu_to_le16(1024),\r
+};\r
+\r
+static struct usb_endpoint_descriptor dm_ss_out_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = cpu_to_le16(1024),\r
+};\r
+\r
+static struct usb_ss_ep_comp_descriptor dm_ss_bulk_comp_desc = {\r
+ .bLength = sizeof dm_ss_bulk_comp_desc,\r
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,\r
+};\r
+\r
+static struct usb_descriptor_header *dm_ss_function[] = {\r
+ (struct usb_descriptor_header *) &dm_interface_desc,\r
+ (struct usb_descriptor_header *) &dm_ss_in_desc,\r
+ (struct usb_descriptor_header *) &dm_ss_bulk_comp_desc,\r
+ (struct usb_descriptor_header *) &dm_ss_out_desc,\r
+ (struct usb_descriptor_header *) &dm_ss_bulk_comp_desc,\r
+ NULL,\r
+};\r
+\r
+\r
+/* string descriptors: */\r
+#define F_DM_IDX 0\r
+\r
+static struct usb_string dm_string_defs[] = {\r
+ [F_DM_IDX].s = "Samsung Android DM",\r
+ { /* ZEROES END LIST */ },\r
+};\r
+\r
+static struct usb_gadget_strings dm_string_table = {\r
+ .language = 0x0409, /* en-us */\r
+ .strings = dm_string_defs,\r
+};\r
+\r
+static struct usb_gadget_strings *dm_strings[] = {\r
+ &dm_string_table,\r
+ NULL,\r
+};\r
+\r
+struct dm_instance {\r
+ struct usb_function_instance func_inst;\r
+ const char *name;\r
+ struct f_dm *dm;\r
+};\r
+/*-------------------------------------------------------------------------*/\r
+\r
+static int dm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)\r
+{\r
+ struct f_dm *dm = func_to_dm(f);\r
+ struct usb_composite_dev *cdev = f->config->cdev;\r
+ int status;\r
+\r
+ /* we know alt == 0, so this is an activation or a reset */\r
+\r
+ if (dm->port.in->driver_data) {\r
+ DBG(cdev, "reset generic ttyGS%d\n", dm->port_num);\r
+ gserial_disconnect(&dm->port);\r
+ } else {\r
+ DBG(cdev, "activate generic ttyGS%d\n", dm->port_num);\r
+ }\r
+ if (!dm->port.in->desc || !dm->port.out->desc) {\r
+ DBG(cdev, "activate dm ttyGS%d\n", dm->port_num);\r
+ if (config_ep_by_speed(cdev->gadget, f,\r
+ dm->port.in) ||\r
+ config_ep_by_speed(cdev->gadget, f,\r
+ dm->port.out)) {\r
+ dm->port.in->desc = NULL;\r
+ dm->port.out->desc = NULL;\r
+ return -EINVAL;\r
+ }\r
+ }\r
+\r
+\r
+ status = gserial_connect(&dm->port, dm->port_num);\r
+ printk(KERN_DEBUG "usb: %s run generic_connect(%d)", __func__,\r
+ dm->port_num);\r
+\r
+ if (status < 0) {\r
+ printk(KERN_DEBUG "fail to activate generic ttyGS%d\n",\r
+ dm->port_num);\r
+\r
+ return status;\r
+ }\r
+\r
+ return 0;\r
+}\r
+\r
+static void dm_disable(struct usb_function *f)\r
+{\r
+ struct f_dm *dm = func_to_dm(f);\r
+\r
+ printk(KERN_DEBUG "usb: %s generic ttyGS%d deactivated\n", __func__,\r
+ dm->port_num);\r
+ gserial_disconnect(&dm->port);\r
+}\r
+\r
+/*-------------------------------------------------------------------------*/\r
+\r
+/* serial function driver setup/binding */\r
+\r
+static int\r
+dm_bind(struct usb_configuration *c, struct usb_function *f)\r
+{\r
+ struct usb_composite_dev *cdev = c->cdev;\r
+ struct f_dm *dm = func_to_dm(f);\r
+ int status;\r
+ struct usb_ep *ep;\r
+\r
+ /* maybe allocate device-global string ID */\r
+ if (dm_string_defs[F_DM_IDX].id == 0) {\r
+ status = usb_string_id(c->cdev);\r
+ if (status < 0)\r
+ return status;\r
+ dm_string_defs[F_DM_IDX].id = status;\r
+ }\r
+ /* allocate instance-specific interface IDs */\r
+ status = usb_interface_id(c, f);\r
+ if (status < 0)\r
+ goto fail;\r
+ dm->data_id = status;\r
+ dm_interface_desc.bInterfaceNumber = status;\r
+\r
+ status = -ENODEV;\r
+\r
+ /* allocate instance-specific endpoints */\r
+ ep = usb_ep_autoconfig(cdev->gadget, &dm_fs_in_desc);\r
+ if (!ep)\r
+ goto fail;\r
+ dm->port.in = ep;\r
+ ep->driver_data = cdev; /* claim */\r
+\r
+ ep = usb_ep_autoconfig(cdev->gadget, &dm_fs_out_desc);\r
+ if (!ep)\r
+ goto fail;\r
+ dm->port.out = ep;\r
+ ep->driver_data = cdev; /* claim */\r
+ printk(KERN_INFO "[%s] in =0x%p , out =0x%p\n", __func__,\r
+ dm->port.in, dm->port.out);\r
+\r
+ /* copy descriptors, and track endpoint copies */\r
+ f->fs_descriptors = usb_copy_descriptors(dm_fs_function);\r
+\r
+\r
+\r
+\r
+ /* support all relevant hardware speeds... we expect that when\r
+ * hardware is dual speed, all bulk-capable endpoints work at\r
+ * both speeds\r
+ */\r
+ if (gadget_is_dualspeed(c->cdev->gadget)) {\r
+ dm_hs_in_desc.bEndpointAddress =\r
+ dm_fs_in_desc.bEndpointAddress;\r
+ dm_hs_out_desc.bEndpointAddress =\r
+ dm_fs_out_desc.bEndpointAddress;\r
+\r
+ /* copy descriptors, and track endpoint copies */\r
+ f->hs_descriptors = usb_copy_descriptors(dm_hs_function);\r
+ }\r
+ if (gadget_is_superspeed(c->cdev->gadget)) {\r
+ dm_ss_in_desc.bEndpointAddress =\r
+ dm_fs_in_desc.bEndpointAddress;\r
+ dm_ss_out_desc.bEndpointAddress =\r
+ dm_fs_out_desc.bEndpointAddress;\r
+\r
+ /* copy descriptors, and track endpoint copies */\r
+ f->ss_descriptors = usb_copy_descriptors(dm_ss_function);\r
+ if (!f->ss_descriptors)\r
+ goto fail;\r
+ }\r
+\r
+ printk("usb: [%s] generic ttyGS%d: %s speed IN/%s OUT/%s\n",\r
+ __func__,\r
+ dm->port_num,\r
+ gadget_is_superspeed(c->cdev->gadget) ? "super" :\r
+ gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",\r
+ dm->port.in->name, dm->port.out->name);\r
+ return 0;\r
+\r
+fail:\r
+ /* we might as well release our claims on endpoints */\r
+ if (dm->port.out)\r
+ dm->port.out->driver_data = NULL;\r
+ if (dm->port.in)\r
+ dm->port.in->driver_data = NULL;\r
+\r
+ printk(KERN_ERR "%s: can't bind, err %d\n", f->name, status);\r
+\r
+ return status;\r
+}\r
+\r
+static void\r
+dm_unbind(struct usb_configuration *c, struct usb_function *f)\r
+{\r
+ if (gadget_is_dualspeed(c->cdev->gadget))\r
+ usb_free_descriptors(f->hs_descriptors);\r
+ usb_free_descriptors(f->fs_descriptors);\r
+ printk(KERN_DEBUG "usb: %s\n", __func__);\r
+}\r
+\r
+/*\r
+ * dm_bind_config - add a generic serial function to a configuration\r
+ * @c: the configuration to support the serial instance\r
+ * @port_num: /dev/ttyGS* port this interface will use\r
+ * Context: single threaded during gadget setup\r
+ *\r
+ * Returns zero on success, else negative errno.\r
+ *\r
+ * Caller must have called @gserial_setup() with enough ports to\r
+ * handle all the ones it binds. Caller is also responsible\r
+ * for calling @gserial_cleanup() before module unload.\r
+ */\r
+int dm_bind_config(struct usb_configuration *c, u8 port_num)\r
+{\r
+ struct f_dm *dm;\r
+ int status;\r
+\r
+ /* REVISIT might want instance-specific strings to help\r
+ * distinguish instances ...\r
+ */\r
+\r
+ /* maybe allocate device-global string ID */\r
+ if (dm_string_defs[F_DM_IDX].id == 0) {\r
+ status = usb_string_id(c->cdev);\r
+ if (status < 0)\r
+ return status;\r
+ dm_string_defs[F_DM_IDX].id = status;\r
+ }\r
+\r
+ /* allocate and initialize one new instance */\r
+ dm = kzalloc(sizeof *dm, GFP_KERNEL);\r
+ if (!dm)\r
+ return -ENOMEM;\r
+\r
+ dm->port_num = DM_PORT_NUM;\r
+\r
+ dm->port.func.name = "dm";\r
+ dm->port.func.strings = dm_strings;\r
+ dm->port.func.bind = dm_bind;\r
+ dm->port.func.unbind = dm_unbind;\r
+ dm->port.func.set_alt = dm_set_alt;\r
+ dm->port.func.disable = dm_disable;\r
+\r
+ status = usb_add_function(c, &dm->port.func);\r
+ if (status)\r
+ kfree(dm);\r
+ return status;\r
+}\r
+static struct dm_instance *to_dm_instance(struct config_item *item)\r
+{\r
+ return container_of(to_config_group(item), struct dm_instance,\r
+ func_inst.group);\r
+}\r
+static void dm_attr_release(struct config_item *item)\r
+{\r
+ struct dm_instance *fi_dm = to_dm_instance(item);\r
+ usb_put_function_instance(&fi_dm->func_inst);\r
+}\r
+\r
+static struct configfs_item_operations dm_item_ops = {\r
+ .release = dm_attr_release,\r
+};\r
+\r
+static struct config_item_type dm_func_type = {\r
+ .ct_item_ops = &dm_item_ops,\r
+ .ct_owner = THIS_MODULE,\r
+};\r
+\r
+\r
+static struct dm_instance *to_fi_dm(struct usb_function_instance *fi)\r
+{\r
+ return container_of(fi, struct dm_instance, func_inst);\r
+}\r
+\r
+static int dm_set_inst_name(struct usb_function_instance *fi, const char *name)\r
+{\r
+ struct dm_instance *fi_dm;\r
+ char *ptr;\r
+ int name_len;\r
+\r
+ name_len = strlen(name) + 1;\r
+ if (name_len > MAX_INST_NAME_LEN)\r
+ return -ENAMETOOLONG;\r
+\r
+ ptr = kstrndup(name, name_len, GFP_KERNEL);\r
+ if (!ptr)\r
+ return -ENOMEM;\r
+\r
+ fi_dm = to_fi_dm(fi);\r
+ fi_dm->name = ptr;\r
+\r
+ return 0;\r
+}\r
+\r
+static void dm_free_inst(struct usb_function_instance *fi)\r
+{\r
+ struct dm_instance *fi_dm;\r
+\r
+ fi_dm = to_fi_dm(fi);\r
+ kfree(fi_dm->name);\r
+ kfree(fi_dm);\r
+}\r
+\r
+struct usb_function_instance *alloc_inst_dm(bool dm_config)\r
+{\r
+ struct dm_instance *fi_dm;\r
+\r
+ fi_dm = kzalloc(sizeof(*fi_dm), GFP_KERNEL);\r
+ if (!fi_dm)\r
+ return ERR_PTR(-ENOMEM);\r
+ fi_dm->func_inst.set_inst_name = dm_set_inst_name;\r
+ fi_dm->func_inst.free_func_inst = dm_free_inst;\r
+\r
+\r
+ config_group_init_type_name(&fi_dm->func_inst.group,\r
+ "", &dm_func_type);\r
+\r
+ return &fi_dm->func_inst;\r
+}\r
+EXPORT_SYMBOL_GPL(alloc_inst_dm);\r
+\r
+static struct usb_function_instance *dm_alloc_inst(void)\r
+{\r
+ return alloc_inst_dm(true);\r
+}\r
+\r
+static void dm_free(struct usb_function *f)\r
+{\r
+ struct f_dm *dm = func_to_dm(f);\r
+\r
+ kfree(dm);\r
+}\r
+\r
+struct usb_function *function_alloc_dm(struct usb_function_instance *fi, bool dm_config)\r
+{\r
+\r
+ struct dm_instance *fi_dm = to_fi_dm(fi);\r
+ struct f_dm *dm;\r
+ int ret;\r
+\r
+ /* REVISIT might want instance-specific strings to help\r
+ * distinguish instances ...\r
+ */\r
+\r
+ /* allocate and initialize one new instance */\r
+ dm = kzalloc(sizeof *dm, GFP_KERNEL);\r
+ if (!dm)\r
+ return ERR_PTR(-ENOMEM);\r
+\r
+\r
+ dm->port_num = DM_PORT_NUM;\r
+\r
+ dm->port.func.name = "dm";\r
+ dm->port.func.strings = dm_strings;\r
+ dm->port.func.bind = dm_bind;\r
+ dm->port.func.unbind = dm_unbind;\r
+ dm->port.func.set_alt = dm_set_alt;\r
+ dm->port.func.disable = dm_disable;\r
+ dm->port.func.free_func = dm_free;\r
+\r
+ fi_dm->dm = dm;\r
+\r
+ ret = gserial_alloc_line(&dm->port_num);\r
+ if (ret) {\r
+ kfree(dm);\r
+ return ERR_PTR(ret);\r
+ }\r
+\r
+ return &dm->port.func;\r
+}\r
+EXPORT_SYMBOL_GPL(function_alloc_dm);\r
+\r
+static struct usb_function *dm_alloc(struct usb_function_instance *fi)\r
+{\r
+ return function_alloc_dm(fi, true);\r
+}\r
+\r
+DECLARE_USB_FUNCTION_INIT(dm, dm_alloc_inst, dm_alloc);\r
+MODULE_LICENSE("GPL");\r
--- /dev/null
+/*\r
+ * Gadget Function Driver for MTP\r
+ *\r
+ * Copyright (C) 2010 Google, Inc.\r
+ * Author: Mike Lockwood <lockwood@android.com>\r
+ *\r
+ * This software is licensed under the terms of the GNU General Public\r
+ * License version 2, as published by the Free Software Foundation, and\r
+ * may be copied, distributed, and modified under those terms.\r
+ *\r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ */\r
+\r
+/* #define DEBUG */\r
+/* #define VERBOSE_DEBUG */\r
+\r
+#include <linux/module.h>\r
+#include <linux/init.h>\r
+#include <linux/poll.h>\r
+#include <linux/delay.h>\r
+#include <linux/wait.h>\r
+#include <linux/err.h>\r
+#include <linux/interrupt.h>\r
+\r
+#include <linux/types.h>\r
+#include <linux/file.h>\r
+#include <linux/device.h>\r
+#include <linux/miscdevice.h>\r
+\r
+#include <linux/usb.h>\r
+#include <linux/usb_usual.h>\r
+#include <linux/usb/ch9.h>\r
+#include <linux/usb/f_mtp.h>\r
+#include <linux/configfs.h>\r
+#include <linux/usb/composite.h>\r
+\r
+#include "configfs.h"\r
+\r
+#define MTP_BULK_BUFFER_SIZE 16384\r
+#define INTR_BUFFER_SIZE 28\r
+#define MAX_INST_NAME_LEN 40\r
+#define MTP_MAX_FILE_SIZE 0xFFFFFFFFL\r
+\r
+/* String IDs */\r
+#define INTERFACE_STRING_INDEX 0\r
+\r
+/* values for mtp_dev.state */\r
+#define STATE_OFFLINE 0 /* initial state, disconnected */\r
+#define STATE_READY 1 /* ready for userspace calls */\r
+#define STATE_BUSY 2 /* processing userspace calls */\r
+#define STATE_CANCELED 3 /* transaction canceled by host */\r
+#define STATE_ERROR 4 /* error from completion routine */\r
+\r
+/* number of tx and rx requests to allocate */\r
+#define TX_REQ_MAX 4\r
+#define RX_REQ_MAX 2\r
+#define INTR_REQ_MAX 5\r
+\r
+/* ID for Microsoft MTP OS String */\r
+#define MTP_OS_STRING_ID 0xEE\r
+\r
+/* MTP class reqeusts */\r
+#define MTP_REQ_CANCEL 0x64\r
+#define MTP_REQ_GET_EXT_EVENT_DATA 0x65\r
+#define MTP_REQ_RESET 0x66\r
+#define MTP_REQ_GET_DEVICE_STATUS 0x67\r
+\r
+/* constants for device status */\r
+#define MTP_RESPONSE_OK 0x2001\r
+#define MTP_RESPONSE_DEVICE_BUSY 0x2019\r
+#define DRIVER_NAME "mtp"\r
+#if IS_ENABLED(CONFIG_USB_CONFIGFS_UEVENT)\r
+#define DRIVER_NAME_PTP "ptp"\r
+#endif\r
+\r
+static const char mtp_shortname[] = DRIVER_NAME "_usb";\r
+\r
+struct mtp_dev {\r
+ struct usb_function function;\r
+#if IS_ENABLED(CONFIG_USB_CONFIGFS_UEVENT)\r
+ struct usb_function function_ptp;\r
+#endif\r
+ struct usb_composite_dev *cdev;\r
+ spinlock_t lock;\r
+\r
+ struct usb_ep *ep_in;\r
+ struct usb_ep *ep_out;\r
+ struct usb_ep *ep_intr;\r
+\r
+ int state;\r
+\r
+ /* synchronize access to our device file */\r
+ atomic_t open_excl;\r
+ /* to enforce only one ioctl at a time */\r
+ atomic_t ioctl_excl;\r
+\r
+ struct list_head tx_idle;\r
+ struct list_head intr_idle;\r
+\r
+ wait_queue_head_t read_wq;\r
+ wait_queue_head_t write_wq;\r
+ wait_queue_head_t intr_wq;\r
+ struct usb_request *rx_req[RX_REQ_MAX];\r
+ int rx_done;\r
+\r
+ /* for processing MTP_SEND_FILE, MTP_RECEIVE_FILE and\r
+ * MTP_SEND_FILE_WITH_HEADER ioctls on a work queue\r
+ */\r
+ struct workqueue_struct *wq;\r
+ struct work_struct send_file_work;\r
+ struct work_struct receive_file_work;\r
+ struct file *xfer_file;\r
+ loff_t xfer_file_offset;\r
+ int64_t xfer_file_length;\r
+ unsigned xfer_send_header;\r
+ uint16_t xfer_command;\r
+ uint32_t xfer_transaction_id;\r
+ int xfer_result;\r
+};\r
+\r
+static struct usb_interface_descriptor mtp_interface_desc = {\r
+ .bLength = USB_DT_INTERFACE_SIZE,\r
+ .bDescriptorType = USB_DT_INTERFACE,\r
+ .bInterfaceNumber = 0,\r
+ .bNumEndpoints = 3,\r
+ .bInterfaceClass = USB_CLASS_VENDOR_SPEC,\r
+ .bInterfaceSubClass = USB_SUBCLASS_VENDOR_SPEC,\r
+ .bInterfaceProtocol = 0,\r
+};\r
+\r
+static struct usb_interface_descriptor ptp_interface_desc = {\r
+ .bLength = USB_DT_INTERFACE_SIZE,\r
+ .bDescriptorType = USB_DT_INTERFACE,\r
+ .bInterfaceNumber = 0,\r
+ .bNumEndpoints = 3,\r
+ .bInterfaceClass = USB_CLASS_STILL_IMAGE,\r
+ .bInterfaceSubClass = 1,\r
+ .bInterfaceProtocol = 1,\r
+};\r
+\r
+static struct usb_endpoint_descriptor mtp_ss_in_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_IN,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = __constant_cpu_to_le16(1024),\r
+};\r
+\r
+static struct usb_ss_ep_comp_descriptor mtp_ss_in_comp_desc = {\r
+ .bLength = sizeof(mtp_ss_in_comp_desc),\r
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,\r
+ /* .bMaxBurst = DYNAMIC, */\r
+};\r
+\r
+static struct usb_endpoint_descriptor mtp_ss_out_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_OUT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = __constant_cpu_to_le16(1024),\r
+};\r
+\r
+static struct usb_ss_ep_comp_descriptor mtp_ss_out_comp_desc = {\r
+ .bLength = sizeof(mtp_ss_out_comp_desc),\r
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,\r
+ /* .bMaxBurst = DYNAMIC, */\r
+};\r
+\r
+static struct usb_endpoint_descriptor mtp_highspeed_in_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_IN,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = __constant_cpu_to_le16(512),\r
+};\r
+\r
+static struct usb_endpoint_descriptor mtp_highspeed_out_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_OUT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = __constant_cpu_to_le16(512),\r
+};\r
+\r
+static struct usb_endpoint_descriptor mtp_fullspeed_in_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_IN,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+};\r
+\r
+static struct usb_endpoint_descriptor mtp_fullspeed_out_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_OUT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+};\r
+\r
+static struct usb_endpoint_descriptor mtp_intr_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_IN,\r
+ .bmAttributes = USB_ENDPOINT_XFER_INT,\r
+ .wMaxPacketSize = __constant_cpu_to_le16(INTR_BUFFER_SIZE),\r
+ .bInterval = 6,\r
+};\r
+\r
+static struct usb_ss_ep_comp_descriptor mtp_intr_ss_comp_desc = {\r
+ .bLength = sizeof(mtp_intr_ss_comp_desc),\r
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,\r
+ .wBytesPerInterval = cpu_to_le16(INTR_BUFFER_SIZE),\r
+};\r
+\r
+static struct usb_descriptor_header *fs_mtp_descs[] = {\r
+ (struct usb_descriptor_header *) &mtp_interface_desc,\r
+ (struct usb_descriptor_header *) &mtp_fullspeed_in_desc,\r
+ (struct usb_descriptor_header *) &mtp_fullspeed_out_desc,\r
+ (struct usb_descriptor_header *) &mtp_intr_desc,\r
+ NULL,\r
+};\r
+\r
+static struct usb_descriptor_header *hs_mtp_descs[] = {\r
+ (struct usb_descriptor_header *) &mtp_interface_desc,\r
+ (struct usb_descriptor_header *) &mtp_highspeed_in_desc,\r
+ (struct usb_descriptor_header *) &mtp_highspeed_out_desc,\r
+ (struct usb_descriptor_header *) &mtp_intr_desc,\r
+ NULL,\r
+};\r
+\r
+static struct usb_descriptor_header *ss_mtp_descs[] = {\r
+ (struct usb_descriptor_header *) &mtp_interface_desc,\r
+ (struct usb_descriptor_header *) &mtp_ss_in_desc,\r
+ (struct usb_descriptor_header *) &mtp_ss_in_comp_desc,\r
+ (struct usb_descriptor_header *) &mtp_ss_out_desc,\r
+ (struct usb_descriptor_header *) &mtp_ss_out_comp_desc,\r
+ (struct usb_descriptor_header *) &mtp_intr_desc,\r
+ (struct usb_descriptor_header *) &mtp_intr_ss_comp_desc,\r
+ NULL,\r
+};\r
+\r
+static struct usb_descriptor_header *fs_ptp_descs[] = {\r
+ (struct usb_descriptor_header *) &ptp_interface_desc,\r
+ (struct usb_descriptor_header *) &mtp_fullspeed_in_desc,\r
+ (struct usb_descriptor_header *) &mtp_fullspeed_out_desc,\r
+ (struct usb_descriptor_header *) &mtp_intr_desc,\r
+ NULL,\r
+};\r
+\r
+static struct usb_descriptor_header *hs_ptp_descs[] = {\r
+ (struct usb_descriptor_header *) &ptp_interface_desc,\r
+ (struct usb_descriptor_header *) &mtp_highspeed_in_desc,\r
+ (struct usb_descriptor_header *) &mtp_highspeed_out_desc,\r
+ (struct usb_descriptor_header *) &mtp_intr_desc,\r
+ NULL,\r
+};\r
+\r
+static struct usb_descriptor_header *ss_ptp_descs[] = {\r
+ (struct usb_descriptor_header *) &ptp_interface_desc,\r
+ (struct usb_descriptor_header *) &mtp_ss_in_desc,\r
+ (struct usb_descriptor_header *) &mtp_ss_in_comp_desc,\r
+ (struct usb_descriptor_header *) &mtp_ss_out_desc,\r
+ (struct usb_descriptor_header *) &mtp_ss_out_comp_desc,\r
+ (struct usb_descriptor_header *) &mtp_intr_desc,\r
+ (struct usb_descriptor_header *) &mtp_intr_ss_comp_desc,\r
+ NULL,\r
+};\r
+\r
+static struct usb_string mtp_string_defs[] = {\r
+ /* Naming interface "MTP" so libmtp will recognize us */\r
+ [INTERFACE_STRING_INDEX].s = "MTP",\r
+ { }, /* end of list */\r
+};\r
+\r
+static struct usb_gadget_strings mtp_string_table = {\r
+ .language = 0x0409, /* en-US */\r
+ .strings = mtp_string_defs,\r
+};\r
+\r
+static struct usb_gadget_strings *mtp_strings[] = {\r
+ &mtp_string_table,\r
+ NULL,\r
+};\r
+\r
+/* Microsoft MTP OS String */\r
+static u8 mtp_os_string[] = {\r
+ 18, /* sizeof(mtp_os_string) */\r
+ USB_DT_STRING,\r
+ /* Signature field: "MSFT100" */\r
+ 'M', 0, 'S', 0, 'F', 0, 'T', 0, '1', 0, '0', 0, '0', 0,\r
+ /* vendor code */\r
+ 1,\r
+ /* padding */\r
+ 0\r
+};\r
+\r
+/* Microsoft Extended Configuration Descriptor Header Section */\r
+struct mtp_ext_config_desc_header {\r
+ __le32 dwLength;\r
+ __u16 bcdVersion;\r
+ __le16 wIndex;\r
+ __u8 bCount;\r
+ __u8 reserved[7];\r
+};\r
+\r
+/* Microsoft Extended Configuration Descriptor Function Section */\r
+struct mtp_ext_config_desc_function {\r
+ __u8 bFirstInterfaceNumber;\r
+ __u8 bInterfaceCount;\r
+ __u8 compatibleID[8];\r
+ __u8 subCompatibleID[8];\r
+ __u8 reserved[6];\r
+};\r
+\r
+/* MTP Extended Configuration Descriptor */\r
+struct {\r
+ struct mtp_ext_config_desc_header header;\r
+ struct mtp_ext_config_desc_function function;\r
+} mtp_ext_config_desc = {\r
+ .header = {\r
+ .dwLength = __constant_cpu_to_le32(sizeof(mtp_ext_config_desc)),\r
+ .bcdVersion = __constant_cpu_to_le16(0x0100),\r
+ .wIndex = __constant_cpu_to_le16(4),\r
+ .bCount = 1,\r
+ },\r
+ .function = {\r
+ .bFirstInterfaceNumber = 0,\r
+ .bInterfaceCount = 1,\r
+ .compatibleID = { 'M', 'T', 'P' },\r
+ },\r
+};\r
+\r
+struct mtp_device_status {\r
+ __le16 wLength;\r
+ __le16 wCode;\r
+};\r
+\r
+struct mtp_data_header {\r
+ /* length of packet, including this header */\r
+ __le32 length;\r
+ /* container type (2 for data packet) */\r
+ __le16 type;\r
+ /* MTP command code */\r
+ __le16 command;\r
+ /* MTP transaction ID */\r
+ __le32 transaction_id;\r
+};\r
+\r
+struct mtp_instance {\r
+ struct usb_function_instance func_inst;\r
+ const char *name;\r
+ struct mtp_dev *dev;\r
+ char mtp_ext_compat_id[16];\r
+ struct usb_os_desc mtp_os_desc;\r
+};\r
+\r
+/* temporary variable used between mtp_open() and mtp_gadget_bind() */\r
+static struct mtp_dev *_mtp_dev;\r
+\r
+static inline struct mtp_dev *func_to_mtp(struct usb_function *f)\r
+{\r
+#if IS_ENABLED(CONFIG_USB_CONFIGFS_UEVENT)\r
+ if (!strcmp(f->name, DRIVER_NAME_PTP))\r
+ return container_of(f, struct mtp_dev, function_ptp);\r
+#endif\r
+ return container_of(f, struct mtp_dev, function);\r
+}\r
+\r
+static struct usb_request *mtp_request_new(struct usb_ep *ep, int buffer_size)\r
+{\r
+ struct usb_request *req = usb_ep_alloc_request(ep, GFP_KERNEL);\r
+\r
+ if (!req)\r
+ return NULL;\r
+\r
+ /* now allocate buffers for the requests */\r
+ req->buf = kmalloc(buffer_size, GFP_KERNEL);\r
+ if (!req->buf) {\r
+ usb_ep_free_request(ep, req);\r
+ return NULL;\r
+ }\r
+\r
+ return req;\r
+}\r
+\r
+static void mtp_request_free(struct usb_request *req, struct usb_ep *ep)\r
+{\r
+ if (req) {\r
+ kfree(req->buf);\r
+ usb_ep_free_request(ep, req);\r
+ }\r
+}\r
+\r
+static inline int mtp_lock(atomic_t *excl)\r
+{\r
+ if (atomic_inc_return(excl) == 1) {\r
+ return 0;\r
+ } else {\r
+ atomic_dec(excl);\r
+ return -1;\r
+ }\r
+}\r
+\r
+static inline void mtp_unlock(atomic_t *excl)\r
+{\r
+ atomic_dec(excl);\r
+}\r
+\r
+/* add a request to the tail of a list */\r
+static void mtp_req_put(struct mtp_dev *dev, struct list_head *head,\r
+ struct usb_request *req)\r
+{\r
+ unsigned long flags;\r
+\r
+ spin_lock_irqsave(&dev->lock, flags);\r
+ list_add_tail(&req->list, head);\r
+ spin_unlock_irqrestore(&dev->lock, flags);\r
+}\r
+\r
+/* remove a request from the head of a list */\r
+static struct usb_request\r
+*mtp_req_get(struct mtp_dev *dev, struct list_head *head)\r
+{\r
+ unsigned long flags;\r
+ struct usb_request *req;\r
+\r
+ spin_lock_irqsave(&dev->lock, flags);\r
+ if (list_empty(head)) {\r
+ req = 0;\r
+ } else {\r
+ req = list_first_entry(head, struct usb_request, list);\r
+ list_del(&req->list);\r
+ }\r
+ spin_unlock_irqrestore(&dev->lock, flags);\r
+ return req;\r
+}\r
+\r
+/* Make bulk-out requests be divisible by the maxpacket size */\r
+static void set_read_req_length(struct usb_request *req)\r
+{\r
+ struct mtp_dev *dev = _mtp_dev;\r
+ unsigned int rem;\r
+\r
+ rem = req->length % dev->ep_out->maxpacket;\r
+ if (rem > 0)\r
+ req->length += dev->ep_out->maxpacket - rem;\r
+}\r
+\r
+static void mtp_complete_in(struct usb_ep *ep, struct usb_request *req)\r
+{\r
+ struct mtp_dev *dev = _mtp_dev;\r
+\r
+ if (req->status != 0)\r
+ dev->state = STATE_ERROR;\r
+\r
+ mtp_req_put(dev, &dev->tx_idle, req);\r
+\r
+ wake_up(&dev->write_wq);\r
+}\r
+\r
+static void mtp_complete_out(struct usb_ep *ep, struct usb_request *req)\r
+{\r
+ struct mtp_dev *dev = _mtp_dev;\r
+\r
+ dev->rx_done = 1;\r
+ if (req->status != 0)\r
+ dev->state = STATE_ERROR;\r
+\r
+ wake_up(&dev->read_wq);\r
+}\r
+\r
+static void mtp_complete_intr(struct usb_ep *ep, struct usb_request *req)\r
+{\r
+ struct mtp_dev *dev = _mtp_dev;\r
+\r
+ if (req->status != 0)\r
+ dev->state = STATE_ERROR;\r
+\r
+ mtp_req_put(dev, &dev->intr_idle, req);\r
+\r
+ wake_up(&dev->intr_wq);\r
+}\r
+\r
+static int mtp_create_bulk_endpoints(struct mtp_dev *dev,\r
+ struct usb_endpoint_descriptor *in_desc,\r
+ struct usb_endpoint_descriptor *out_desc,\r
+ struct usb_endpoint_descriptor *intr_desc)\r
+{\r
+ struct usb_composite_dev *cdev = dev->cdev;\r
+ struct usb_request *req;\r
+ struct usb_ep *ep;\r
+ int i;\r
+\r
+ DBG(cdev, "create_bulk_endpoints dev: %p\n", dev);\r
+\r
+ ep = usb_ep_autoconfig(cdev->gadget, in_desc);\r
+ if (!ep) {\r
+ DBG(cdev, "usb_ep_autoconfig for ep_in failed\n");\r
+ return -ENODEV;\r
+ }\r
+ DBG(cdev, "usb_ep_autoconfig for ep_in got %s\n", ep->name);\r
+ ep->driver_data = dev; /* claim the endpoint */\r
+ dev->ep_in = ep;\r
+\r
+ ep = usb_ep_autoconfig(cdev->gadget, out_desc);\r
+ if (!ep) {\r
+ DBG(cdev, "usb_ep_autoconfig for ep_out failed\n");\r
+ return -ENODEV;\r
+ }\r
+ DBG(cdev, "usb_ep_autoconfig for mtp ep_out got %s\n", ep->name);\r
+ ep->driver_data = dev; /* claim the endpoint */\r
+ dev->ep_out = ep;\r
+\r
+ ep = usb_ep_autoconfig(cdev->gadget, intr_desc);\r
+ if (!ep) {\r
+ DBG(cdev, "usb_ep_autoconfig for ep_intr failed\n");\r
+ return -ENODEV;\r
+ }\r
+ DBG(cdev, "usb_ep_autoconfig for mtp ep_intr got %s\n", ep->name);\r
+ ep->driver_data = dev; /* claim the endpoint */\r
+ dev->ep_intr = ep;\r
+\r
+ /* now allocate requests for our endpoints */\r
+ for (i = 0; i < TX_REQ_MAX; i++) {\r
+ req = mtp_request_new(dev->ep_in, MTP_BULK_BUFFER_SIZE);\r
+ if (!req)\r
+ goto fail;\r
+ req->complete = mtp_complete_in;\r
+ mtp_req_put(dev, &dev->tx_idle, req);\r
+ }\r
+ for (i = 0; i < RX_REQ_MAX; i++) {\r
+ req = mtp_request_new(dev->ep_out, MTP_BULK_BUFFER_SIZE);\r
+ if (!req)\r
+ goto fail;\r
+ req->complete = mtp_complete_out;\r
+ dev->rx_req[i] = req;\r
+ }\r
+ for (i = 0; i < INTR_REQ_MAX; i++) {\r
+ req = mtp_request_new(dev->ep_intr, INTR_BUFFER_SIZE);\r
+ if (!req)\r
+ goto fail;\r
+ req->complete = mtp_complete_intr;\r
+ mtp_req_put(dev, &dev->intr_idle, req);\r
+ }\r
+\r
+ return 0;\r
+\r
+fail:\r
+ pr_err("mtp_bind() could not allocate requests\n");\r
+ return -1;\r
+}\r
+\r
+static ssize_t mtp_read(struct file *fp, char __user *buf,\r
+ size_t count, loff_t *pos)\r
+{\r
+ struct mtp_dev *dev = fp->private_data;\r
+ struct usb_composite_dev *cdev = dev->cdev;\r
+ struct usb_request *req;\r
+ ssize_t r = count;\r
+ unsigned xfer;\r
+ int ret = 0;\r
+ size_t len = 0;\r
+\r
+ DBG(cdev, "mtp_read(%zu)\n", count);\r
+\r
+ /* we will block until we're online */\r
+ DBG(cdev, "mtp_read: waiting for online state\n");\r
+ ret = wait_event_interruptible(dev->read_wq,\r
+ dev->state != STATE_OFFLINE);\r
+ if (ret < 0) {\r
+ r = ret;\r
+ goto done;\r
+ }\r
+ spin_lock_irq(&dev->lock);\r
+ if (dev->ep_out->desc) {\r
+ len = usb_ep_align_maybe(cdev->gadget, dev->ep_out, count);\r
+ if (len > MTP_BULK_BUFFER_SIZE) {\r
+ spin_unlock_irq(&dev->lock);\r
+ return -EINVAL;\r
+ }\r
+ }\r
+\r
+ if (dev->state == STATE_CANCELED) {\r
+ /* report cancelation to userspace */\r
+ dev->state = STATE_READY;\r
+ spin_unlock_irq(&dev->lock);\r
+ return -ECANCELED;\r
+ }\r
+ dev->state = STATE_BUSY;\r
+ spin_unlock_irq(&dev->lock);\r
+\r
+requeue_req:\r
+ /* queue a request */\r
+ req = dev->rx_req[0];\r
+ req->length = len;\r
+ dev->rx_done = 0;\r
+ set_read_req_length(req);\r
+ ret = usb_ep_queue(dev->ep_out, req, GFP_KERNEL);\r
+ if (ret < 0) {\r
+ r = -EIO;\r
+ goto done;\r
+ } else {\r
+ DBG(cdev, "rx %p queue\n", req);\r
+ }\r
+\r
+ /* wait for a request to complete */\r
+ ret = wait_event_interruptible(dev->read_wq, dev->rx_done);\r
+ if (ret < 0) {\r
+ r = ret;\r
+ usb_ep_dequeue(dev->ep_out, req);\r
+ goto done;\r
+ }\r
+ if (dev->state == STATE_BUSY) {\r
+ /* If we got a 0-len packet, throw it back and try again. */\r
+ if (req->actual == 0)\r
+ goto requeue_req;\r
+\r
+ DBG(cdev, "rx %p %d\n", req, req->actual);\r
+ xfer = (req->actual < count) ? req->actual : count;\r
+ r = xfer;\r
+ if (copy_to_user(buf, req->buf, xfer))\r
+ r = -EFAULT;\r
+ } else\r
+ r = -EIO;\r
+\r
+done:\r
+ spin_lock_irq(&dev->lock);\r
+ if (dev->state == STATE_CANCELED)\r
+ r = -ECANCELED;\r
+ else if (dev->state != STATE_OFFLINE)\r
+ dev->state = STATE_READY;\r
+ spin_unlock_irq(&dev->lock);\r
+\r
+ DBG(cdev, "mtp_read returning %zd\n", r);\r
+ return r;\r
+}\r
+\r
+static ssize_t mtp_write(struct file *fp, const char __user *buf,\r
+ size_t count, loff_t *pos)\r
+{\r
+ struct mtp_dev *dev = fp->private_data;\r
+ struct usb_composite_dev *cdev = dev->cdev;\r
+ struct usb_request *req = 0;\r
+ ssize_t r = count;\r
+ unsigned xfer;\r
+ int sendZLP = 0;\r
+ int ret;\r
+\r
+ DBG(cdev, "mtp_write(%zu)\n", count);\r
+\r
+ spin_lock_irq(&dev->lock);\r
+ if (dev->state == STATE_CANCELED) {\r
+ /* report cancelation to userspace */\r
+ dev->state = STATE_READY;\r
+ spin_unlock_irq(&dev->lock);\r
+ return -ECANCELED;\r
+ }\r
+ if (dev->state == STATE_OFFLINE) {\r
+ spin_unlock_irq(&dev->lock);\r
+ return -ENODEV;\r
+ }\r
+ dev->state = STATE_BUSY;\r
+ spin_unlock_irq(&dev->lock);\r
+\r
+ /* we need to send a zero length packet to signal the end of transfer\r
+ * if the transfer size is aligned to a packet boundary.\r
+ */\r
+ if ((count & (dev->ep_in->maxpacket - 1)) == 0)\r
+ sendZLP = 1;\r
+\r
+ while (count > 0 || sendZLP) {\r
+ /* so we exit after sending ZLP */\r
+ if (count == 0)\r
+ sendZLP = 0;\r
+\r
+ if (dev->state != STATE_BUSY) {\r
+ DBG(cdev, "mtp_write dev->error\n");\r
+ r = -EIO;\r
+ break;\r
+ }\r
+\r
+ /* get an idle tx request to use */\r
+ req = 0;\r
+ ret = wait_event_interruptible(dev->write_wq,\r
+ ((req = mtp_req_get(dev, &dev->tx_idle))\r
+ || dev->state != STATE_BUSY));\r
+ if (!req) {\r
+ r = ret;\r
+ break;\r
+ }\r
+\r
+ if (count > MTP_BULK_BUFFER_SIZE)\r
+ xfer = MTP_BULK_BUFFER_SIZE;\r
+ else\r
+ xfer = count;\r
+ if (xfer && copy_from_user(req->buf, buf, xfer)) {\r
+ r = -EFAULT;\r
+ break;\r
+ }\r
+\r
+ req->length = xfer;\r
+ ret = usb_ep_queue(dev->ep_in, req, GFP_KERNEL);\r
+ if (ret < 0) {\r
+ DBG(cdev, "mtp_write: xfer error %d\n", ret);\r
+ r = -EIO;\r
+ break;\r
+ }\r
+\r
+ buf += xfer;\r
+ count -= xfer;\r
+\r
+ /* zero this so we don't try to free it on error exit */\r
+ req = 0;\r
+ }\r
+\r
+ if (req)\r
+ mtp_req_put(dev, &dev->tx_idle, req);\r
+\r
+ spin_lock_irq(&dev->lock);\r
+ if (dev->state == STATE_CANCELED)\r
+ r = -ECANCELED;\r
+ else if (dev->state != STATE_OFFLINE)\r
+ dev->state = STATE_READY;\r
+ spin_unlock_irq(&dev->lock);\r
+\r
+ DBG(cdev, "mtp_write returning %zd\n", r);\r
+ return r;\r
+}\r
+\r
+/* read from a local file and write to USB */\r
+static void send_file_work(struct work_struct *data)\r
+{\r
+ struct mtp_dev *dev = container_of(data, struct mtp_dev,\r
+ send_file_work);\r
+ struct usb_composite_dev *cdev = dev->cdev;\r
+ struct usb_request *req = 0;\r
+ struct mtp_data_header *header;\r
+ struct file *filp;\r
+ loff_t offset;\r
+ int64_t count;\r
+ int xfer, ret, hdr_size;\r
+ int r = 0;\r
+ int sendZLP = 0;\r
+\r
+ /* read our parameters */\r
+ smp_rmb();\r
+ filp = dev->xfer_file;\r
+ offset = dev->xfer_file_offset;\r
+ count = dev->xfer_file_length;\r
+\r
+ DBG(cdev, "send_file_work(%lld %lld)\n", offset, count);\r
+\r
+ if (dev->xfer_send_header) {\r
+ hdr_size = sizeof(struct mtp_data_header);\r
+ count += hdr_size;\r
+ } else {\r
+ hdr_size = 0;\r
+ }\r
+\r
+ /* we need to send a zero length packet to signal the end of transfer\r
+ * if the transfer size is aligned to a packet boundary.\r
+ */\r
+ if ((count & (dev->ep_in->maxpacket - 1)) == 0)\r
+ sendZLP = 1;\r
+\r
+ while (count > 0 || sendZLP) {\r
+ /* so we exit after sending ZLP */\r
+ if (count == 0)\r
+ sendZLP = 0;\r
+\r
+ /* get an idle tx request to use */\r
+ req = 0;\r
+ ret = wait_event_interruptible(dev->write_wq,\r
+ (req = mtp_req_get(dev, &dev->tx_idle))\r
+ || dev->state != STATE_BUSY);\r
+ if (dev->state == STATE_CANCELED) {\r
+ r = -ECANCELED;\r
+ break;\r
+ }\r
+ if (!req) {\r
+ r = ret;\r
+ break;\r
+ }\r
+\r
+ if (count > MTP_BULK_BUFFER_SIZE)\r
+ xfer = MTP_BULK_BUFFER_SIZE;\r
+ else\r
+ xfer = count;\r
+\r
+ if (hdr_size) {\r
+ /* prepend MTP data header */\r
+ header = (struct mtp_data_header *)req->buf;\r
+ /*\r
+ * set file size with header according to\r
+ * MTP Specification v1.0\r
+ */\r
+ header->length = (count > MTP_MAX_FILE_SIZE) ?\r
+ MTP_MAX_FILE_SIZE : __cpu_to_le32(count);\r
+ header->type = __cpu_to_le16(2); /* data packet */\r
+ header->command = __cpu_to_le16(dev->xfer_command);\r
+ header->transaction_id =\r
+ __cpu_to_le32(dev->xfer_transaction_id);\r
+ }\r
+\r
+ ret = vfs_read(filp, req->buf + hdr_size, xfer - hdr_size,\r
+ &offset);\r
+ if (ret < 0) {\r
+ r = ret;\r
+ break;\r
+ }\r
+ xfer = ret + hdr_size;\r
+ hdr_size = 0;\r
+\r
+ req->length = xfer;\r
+ ret = usb_ep_queue(dev->ep_in, req, GFP_KERNEL);\r
+ if (ret < 0) {\r
+ DBG(cdev, "send_file_work: xfer error %d\n", ret);\r
+ dev->state = STATE_ERROR;\r
+ r = -EIO;\r
+ break;\r
+ }\r
+\r
+ count -= xfer;\r
+\r
+ /* zero this so we don't try to free it on error exit */\r
+ req = 0;\r
+ }\r
+\r
+ if (req)\r
+ mtp_req_put(dev, &dev->tx_idle, req);\r
+\r
+ DBG(cdev, "send_file_work returning %d\n", r);\r
+ /* write the result */\r
+ dev->xfer_result = r;\r
+ smp_wmb();\r
+}\r
+\r
+/* read from USB and write to a local file */\r
+static void receive_file_work(struct work_struct *data)\r
+{\r
+ struct mtp_dev *dev = container_of(data, struct mtp_dev,\r
+ receive_file_work);\r
+ struct usb_composite_dev *cdev = dev->cdev;\r
+ struct usb_request *read_req = NULL, *write_req = NULL;\r
+ struct file *filp;\r
+ loff_t offset;\r
+ int64_t count;\r
+ int ret, cur_buf = 0;\r
+ int r = 0;\r
+\r
+ /* read our parameters */\r
+ smp_rmb();\r
+ filp = dev->xfer_file;\r
+ offset = dev->xfer_file_offset;\r
+ count = dev->xfer_file_length;\r
+\r
+ DBG(cdev, "receive_file_work(%lld)\n", count);\r
+\r
+ while (count > 0 || write_req) {\r
+ if (count > 0) {\r
+ /* queue a request */\r
+ read_req = dev->rx_req[cur_buf];\r
+ cur_buf = (cur_buf + 1) % RX_REQ_MAX;\r
+\r
+ read_req->length = (count > MTP_BULK_BUFFER_SIZE\r
+ ? MTP_BULK_BUFFER_SIZE : count);\r
+ dev->rx_done = 0;\r
+\r
+ set_read_req_length(read_req);\r
+ ret = usb_ep_queue(dev->ep_out, read_req, GFP_KERNEL);\r
+ if (ret < 0) {\r
+ r = -EIO;\r
+ dev->state = STATE_ERROR;\r
+ break;\r
+ }\r
+ }\r
+\r
+ if (write_req) {\r
+ DBG(cdev, "rx %p %d\n", write_req, write_req->actual);\r
+ ret = vfs_write(filp, write_req->buf, write_req->actual,\r
+ &offset);\r
+ DBG(cdev, "vfs_write %d\n", ret);\r
+ if (ret != write_req->actual) {\r
+ r = -EIO;\r
+ dev->state = STATE_ERROR;\r
+ break;\r
+ }\r
+ write_req = NULL;\r
+ }\r
+\r
+ if (read_req) {\r
+ /* wait for our last read to complete */\r
+ ret = wait_event_interruptible(dev->read_wq,\r
+ dev->rx_done || dev->state != STATE_BUSY);\r
+ if (dev->state == STATE_CANCELED) {\r
+ r = -ECANCELED;\r
+ if (!dev->rx_done)\r
+ usb_ep_dequeue(dev->ep_out, read_req);\r
+ break;\r
+ }\r
+ if (read_req->status) {\r
+ r = read_req->status;\r
+ break;\r
+ }\r
+ /* if xfer_file_length is 0xFFFFFFFF, then we read until\r
+ * we get a zero length packet\r
+ */\r
+ if (count != 0xFFFFFFFF)\r
+ count -= read_req->actual;\r
+ if (read_req->actual < read_req->length) {\r
+ /*\r
+ * short packet is used to signal EOF for\r
+ * sizes > 4 gig\r
+ */\r
+ DBG(cdev, "got short packet\n");\r
+ count = 0;\r
+ }\r
+\r
+ write_req = read_req;\r
+ read_req = NULL;\r
+ }\r
+ }\r
+\r
+ DBG(cdev, "receive_file_work returning %d\n", r);\r
+ /* write the result */\r
+ dev->xfer_result = r;\r
+ smp_wmb();\r
+}\r
+\r
+static int mtp_send_event(struct mtp_dev *dev, struct mtp_event *event)\r
+{\r
+ struct usb_request *req = NULL;\r
+ int ret;\r
+ int length = event->length;\r
+\r
+ DBG(dev->cdev, "mtp_send_event(%zu)\n", event->length);\r
+\r
+ if (length < 0 || length > INTR_BUFFER_SIZE)\r
+ return -EINVAL;\r
+ if (dev->state == STATE_OFFLINE)\r
+ return -ENODEV;\r
+\r
+ ret = wait_event_interruptible_timeout(dev->intr_wq,\r
+ (req = mtp_req_get(dev, &dev->intr_idle)),\r
+ msecs_to_jiffies(1000));\r
+ if (!req)\r
+ return -ETIME;\r
+\r
+ if (copy_from_user(req->buf, (void __user *)event->data, length)) {\r
+ mtp_req_put(dev, &dev->intr_idle, req);\r
+ return -EFAULT;\r
+ }\r
+ req->length = length;\r
+ ret = usb_ep_queue(dev->ep_intr, req, GFP_KERNEL);\r
+ if (ret)\r
+ mtp_req_put(dev, &dev->intr_idle, req);\r
+\r
+ return ret;\r
+}\r
+\r
+static long mtp_ioctl(struct file *fp, unsigned code, unsigned long value)\r
+{\r
+ struct mtp_dev *dev = fp->private_data;\r
+ struct file *filp = NULL;\r
+ int ret = -EINVAL;\r
+\r
+ if (mtp_lock(&dev->ioctl_excl))\r
+ return -EBUSY;\r
+\r
+ switch (code) {\r
+ case MTP_SEND_FILE:\r
+ case MTP_RECEIVE_FILE:\r
+ case MTP_SEND_FILE_WITH_HEADER:\r
+ {\r
+ struct mtp_file_range mfr;\r
+ struct work_struct *work;\r
+\r
+ spin_lock_irq(&dev->lock);\r
+ if (dev->state == STATE_CANCELED) {\r
+ /* report cancelation to userspace */\r
+ dev->state = STATE_READY;\r
+ spin_unlock_irq(&dev->lock);\r
+ ret = -ECANCELED;\r
+ goto out;\r
+ }\r
+ if (dev->state == STATE_OFFLINE) {\r
+ spin_unlock_irq(&dev->lock);\r
+ ret = -ENODEV;\r
+ goto out;\r
+ }\r
+ dev->state = STATE_BUSY;\r
+ spin_unlock_irq(&dev->lock);\r
+\r
+ if (copy_from_user(&mfr, (void __user *)value, sizeof(mfr))) {\r
+ ret = -EFAULT;\r
+ goto fail;\r
+ }\r
+ /* hold a reference to the file while we are working with it */\r
+ filp = fget(mfr.fd);\r
+ if (!filp) {\r
+ ret = -EBADF;\r
+ goto fail;\r
+ }\r
+\r
+ /* write the parameters */\r
+ dev->xfer_file = filp;\r
+ dev->xfer_file_offset = mfr.offset;\r
+ dev->xfer_file_length = mfr.length;\r
+ smp_wmb();\r
+\r
+ if (code == MTP_SEND_FILE_WITH_HEADER) {\r
+ work = &dev->send_file_work;\r
+ dev->xfer_send_header = 1;\r
+ dev->xfer_command = mfr.command;\r
+ dev->xfer_transaction_id = mfr.transaction_id;\r
+ } else if (code == MTP_SEND_FILE) {\r
+ work = &dev->send_file_work;\r
+ dev->xfer_send_header = 0;\r
+ } else {\r
+ work = &dev->receive_file_work;\r
+ }\r
+\r
+ /* We do the file transfer on a work queue so it will run\r
+ * in kernel context, which is necessary for vfs_read and\r
+ * vfs_write to use our buffers in the kernel address space.\r
+ */\r
+ queue_work(dev->wq, work);\r
+ /* wait for operation to complete */\r
+ flush_workqueue(dev->wq);\r
+ fput(filp);\r
+\r
+ /* read the result */\r
+ smp_rmb();\r
+ ret = dev->xfer_result;\r
+ break;\r
+ }\r
+ case MTP_SEND_EVENT:\r
+ {\r
+ struct mtp_event event;\r
+ /* return here so we don't change dev->state below,\r
+ * which would interfere with bulk transfer state.\r
+ */\r
+ if (copy_from_user(&event, (void __user *)value, sizeof(event)))\r
+ ret = -EFAULT;\r
+ else\r
+ ret = mtp_send_event(dev, &event);\r
+ goto out;\r
+ }\r
+ }\r
+\r
+fail:\r
+ spin_lock_irq(&dev->lock);\r
+ if (dev->state == STATE_CANCELED)\r
+ ret = -ECANCELED;\r
+ else if (dev->state != STATE_OFFLINE)\r
+ dev->state = STATE_READY;\r
+ spin_unlock_irq(&dev->lock);\r
+out:\r
+ mtp_unlock(&dev->ioctl_excl);\r
+ DBG(dev->cdev, "ioctl returning %d\n", ret);\r
+ return ret;\r
+}\r
+\r
+static int mtp_open(struct inode *ip, struct file *fp)\r
+{\r
+ printk(KERN_INFO "mtp_open\n");\r
+ if (mtp_lock(&_mtp_dev->open_excl))\r
+ return -EBUSY;\r
+\r
+ /* clear any error condition */\r
+ if (_mtp_dev->state != STATE_OFFLINE)\r
+ _mtp_dev->state = STATE_READY;\r
+\r
+ fp->private_data = _mtp_dev;\r
+ return 0;\r
+}\r
+\r
+static int mtp_release(struct inode *ip, struct file *fp)\r
+{\r
+ printk(KERN_INFO "mtp_release\n");\r
+\r
+ mtp_unlock(&_mtp_dev->open_excl);\r
+ return 0;\r
+}\r
+\r
+/* file operations for /dev/mtp_usb */\r
+static const struct file_operations mtp_fops = {\r
+ .owner = THIS_MODULE,\r
+ .read = mtp_read,\r
+ .write = mtp_write,\r
+ .unlocked_ioctl = mtp_ioctl,\r
+ .open = mtp_open,\r
+ .release = mtp_release,\r
+};\r
+\r
+static struct miscdevice mtp_device = {\r
+ .minor = MISC_DYNAMIC_MINOR,\r
+ .name = mtp_shortname,\r
+ .fops = &mtp_fops,\r
+};\r
+\r
+static int mtp_ctrlrequest(struct usb_composite_dev *cdev,\r
+ const struct usb_ctrlrequest *ctrl)\r
+{\r
+ struct mtp_dev *dev = _mtp_dev;\r
+ int value = -EOPNOTSUPP;\r
+ u16 w_index = le16_to_cpu(ctrl->wIndex);\r
+ u16 w_value = le16_to_cpu(ctrl->wValue);\r
+ u16 w_length = le16_to_cpu(ctrl->wLength);\r
+ unsigned long flags;\r
+\r
+ VDBG(cdev, "mtp_ctrlrequest "\r
+ "%02x.%02x v%04x i%04x l%u\n",\r
+ ctrl->bRequestType, ctrl->bRequest,\r
+ w_value, w_index, w_length);\r
+\r
+ /* Handle MTP OS string */\r
+ if (ctrl->bRequestType ==\r
+ (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE)\r
+ && ctrl->bRequest == USB_REQ_GET_DESCRIPTOR\r
+ && (w_value >> 8) == USB_DT_STRING\r
+ && (w_value & 0xFF) == MTP_OS_STRING_ID) {\r
+ value = (w_length < sizeof(mtp_os_string)\r
+ ? w_length : sizeof(mtp_os_string));\r
+ memcpy(cdev->req->buf, mtp_os_string, value);\r
+ } else if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR) {\r
+ /* Handle MTP OS descriptor */\r
+ DBG(cdev, "vendor request: %d index: %d value: %d length: %d\n",\r
+ ctrl->bRequest, w_index, w_value, w_length);\r
+\r
+ if (ctrl->bRequest == 1\r
+ && (ctrl->bRequestType & USB_DIR_IN)\r
+ && (w_index == 4 || w_index == 5)) {\r
+ value = (w_length < sizeof(mtp_ext_config_desc) ?\r
+ w_length : sizeof(mtp_ext_config_desc));\r
+ memcpy(cdev->req->buf, &mtp_ext_config_desc, value);\r
+ }\r
+ } else if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) {\r
+ DBG(cdev, "class request: %d index: %d value: %d length: %d\n",\r
+ ctrl->bRequest, w_index, w_value, w_length);\r
+\r
+ if (ctrl->bRequest == MTP_REQ_CANCEL && w_index == 0\r
+ && w_value == 0) {\r
+ DBG(cdev, "MTP_REQ_CANCEL\n");\r
+\r
+ spin_lock_irqsave(&dev->lock, flags);\r
+ if (dev->state == STATE_BUSY) {\r
+ dev->state = STATE_CANCELED;\r
+ wake_up(&dev->read_wq);\r
+ wake_up(&dev->write_wq);\r
+ }\r
+ spin_unlock_irqrestore(&dev->lock, flags);\r
+\r
+ /* We need to queue a request to read the remaining\r
+ * bytes, but we don't actually need to look at\r
+ * the contents.\r
+ */\r
+ value = w_length;\r
+ } else if (ctrl->bRequest == MTP_REQ_GET_DEVICE_STATUS\r
+ && w_index == 0 && w_value == 0) {\r
+ struct mtp_device_status *status = cdev->req->buf;\r
+\r
+ status->wLength =\r
+ __constant_cpu_to_le16(sizeof(*status));\r
+\r
+ DBG(cdev, "MTP_REQ_GET_DEVICE_STATUS\n");\r
+ spin_lock_irqsave(&dev->lock, flags);\r
+ /* device status is "busy" until we report\r
+ * the cancelation to userspace\r
+ */\r
+ if (dev->state == STATE_CANCELED)\r
+ status->wCode =\r
+ __cpu_to_le16(MTP_RESPONSE_DEVICE_BUSY);\r
+ else\r
+ status->wCode =\r
+ __cpu_to_le16(MTP_RESPONSE_OK);\r
+ spin_unlock_irqrestore(&dev->lock, flags);\r
+ value = sizeof(*status);\r
+ }\r
+ }\r
+\r
+ /* respond with data transfer or status phase? */\r
+ if (value >= 0) {\r
+ int rc;\r
+\r
+ cdev->req->zero = value < w_length;\r
+ cdev->req->length = value;\r
+ rc = usb_ep_queue(cdev->gadget->ep0, cdev->req, GFP_ATOMIC);\r
+ if (rc < 0)\r
+ ERROR(cdev, "%s: response queue error\n", __func__);\r
+ }\r
+ return value;\r
+}\r
+\r
+static int\r
+mtp_function_bind(struct usb_configuration *c, struct usb_function *f)\r
+{\r
+ struct usb_composite_dev *cdev = c->cdev;\r
+ struct mtp_dev *dev = func_to_mtp(f);\r
+ int id;\r
+ int ret;\r
+ struct mtp_instance *fi_mtp;\r
+\r
+ dev->cdev = cdev;\r
+ DBG(cdev, "mtp_function_bind dev: %p\n", dev);\r
+\r
+ /* allocate interface ID(s) */\r
+ id = usb_interface_id(c, f);\r
+ if (id < 0)\r
+ return id;\r
+ mtp_interface_desc.bInterfaceNumber = id;\r
+\r
+ if (mtp_string_defs[INTERFACE_STRING_INDEX].id == 0) {\r
+ ret = usb_string_id(c->cdev);\r
+ if (ret < 0)\r
+ return ret;\r
+ mtp_string_defs[INTERFACE_STRING_INDEX].id = ret;\r
+ mtp_interface_desc.iInterface = ret;\r
+ }\r
+\r
+ fi_mtp = container_of(f->fi, struct mtp_instance, func_inst);\r
+\r
+ if (cdev->use_os_string) {\r
+ f->os_desc_table = kzalloc(sizeof(*f->os_desc_table),\r
+ GFP_KERNEL);\r
+ if (!f->os_desc_table)\r
+ return -ENOMEM;\r
+ f->os_desc_n = 1;\r
+ f->os_desc_table[0].os_desc = &fi_mtp->mtp_os_desc;\r
+ }\r
+\r
+ /* allocate endpoints */\r
+ ret = mtp_create_bulk_endpoints(dev, &mtp_fullspeed_in_desc,\r
+ &mtp_fullspeed_out_desc, &mtp_intr_desc);\r
+ if (ret)\r
+ return ret;\r
+\r
+ /* support high speed hardware */\r
+ if (gadget_is_dualspeed(c->cdev->gadget)) {\r
+ mtp_highspeed_in_desc.bEndpointAddress =\r
+ mtp_fullspeed_in_desc.bEndpointAddress;\r
+ mtp_highspeed_out_desc.bEndpointAddress =\r
+ mtp_fullspeed_out_desc.bEndpointAddress;\r
+ }\r
+ /* support super speed hardware */\r
+ if (gadget_is_superspeed(c->cdev->gadget)) {\r
+ unsigned max_burst;\r
+\r
+ /* Calculate bMaxBurst, we know packet size is 1024 */\r
+ max_burst = min_t(unsigned, MTP_BULK_BUFFER_SIZE / 1024, 15);\r
+ mtp_ss_in_desc.bEndpointAddress =\r
+ mtp_fullspeed_in_desc.bEndpointAddress;\r
+ mtp_ss_in_comp_desc.bMaxBurst = max_burst;\r
+ mtp_ss_out_desc.bEndpointAddress =\r
+ mtp_fullspeed_out_desc.bEndpointAddress;\r
+ mtp_ss_out_comp_desc.bMaxBurst = max_burst;\r
+ }\r
+\r
+ DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n",\r
+ gadget_is_superspeed(c->cdev->gadget) ? "super" :\r
+ (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full"),\r
+ f->name, dev->ep_in->name, dev->ep_out->name);\r
+ return 0;\r
+}\r
+\r
+static void\r
+mtp_function_unbind(struct usb_configuration *c, struct usb_function *f)\r
+{\r
+ struct mtp_dev *dev = func_to_mtp(f);\r
+ struct usb_request *req;\r
+ int i;\r
+\r
+ mtp_string_defs[INTERFACE_STRING_INDEX].id = 0;\r
+ while ((req = mtp_req_get(dev, &dev->tx_idle)))\r
+ mtp_request_free(req, dev->ep_in);\r
+ for (i = 0; i < RX_REQ_MAX; i++)\r
+ mtp_request_free(dev->rx_req[i], dev->ep_out);\r
+ while ((req = mtp_req_get(dev, &dev->intr_idle)))\r
+ mtp_request_free(req, dev->ep_intr);\r
+ dev->state = STATE_OFFLINE;\r
+ kfree(f->os_desc_table);\r
+ f->os_desc_n = 0;\r
+}\r
+\r
+static int mtp_function_set_alt(struct usb_function *f,\r
+ unsigned intf, unsigned alt)\r
+{\r
+ struct mtp_dev *dev = func_to_mtp(f);\r
+ struct usb_composite_dev *cdev = f->config->cdev;\r
+ int ret;\r
+\r
+ DBG(cdev, "mtp_function_set_alt intf: %d alt: %d\n", intf, alt);\r
+\r
+ ret = config_ep_by_speed(cdev->gadget, f, dev->ep_in);\r
+ if (ret)\r
+ return ret;\r
+\r
+ ret = usb_ep_enable(dev->ep_in);\r
+ if (ret)\r
+ return ret;\r
+\r
+ ret = config_ep_by_speed(cdev->gadget, f, dev->ep_out);\r
+ if (ret)\r
+ return ret;\r
+\r
+ ret = usb_ep_enable(dev->ep_out);\r
+ if (ret) {\r
+ usb_ep_disable(dev->ep_in);\r
+ return ret;\r
+ }\r
+\r
+ ret = config_ep_by_speed(cdev->gadget, f, dev->ep_intr);\r
+ if (ret)\r
+ return ret;\r
+\r
+ ret = usb_ep_enable(dev->ep_intr);\r
+ if (ret) {\r
+ usb_ep_disable(dev->ep_out);\r
+ usb_ep_disable(dev->ep_in);\r
+ return ret;\r
+ }\r
+ dev->state = STATE_READY;\r
+\r
+ /* readers may be blocked waiting for us to go online */\r
+ wake_up(&dev->read_wq);\r
+ return 0;\r
+}\r
+\r
+static void mtp_function_disable(struct usb_function *f)\r
+{\r
+ struct mtp_dev *dev = func_to_mtp(f);\r
+ struct usb_composite_dev *cdev = dev->cdev;\r
+\r
+ DBG(cdev, "mtp_function_disable\n");\r
+ dev->state = STATE_OFFLINE;\r
+ usb_ep_disable(dev->ep_in);\r
+ usb_ep_disable(dev->ep_out);\r
+ usb_ep_disable(dev->ep_intr);\r
+\r
+ /* readers may be blocked waiting for us to go online */\r
+ wake_up(&dev->read_wq);\r
+\r
+ VDBG(cdev, "%s disabled\n", dev->function.name);\r
+}\r
+\r
+static int __mtp_setup(struct mtp_instance *fi_mtp)\r
+{\r
+ struct mtp_dev *dev;\r
+ int ret;\r
+\r
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);\r
+\r
+ if (fi_mtp != NULL)\r
+ fi_mtp->dev = dev;\r
+\r
+ if (!dev)\r
+ return -ENOMEM;\r
+\r
+ spin_lock_init(&dev->lock);\r
+ init_waitqueue_head(&dev->read_wq);\r
+ init_waitqueue_head(&dev->write_wq);\r
+ init_waitqueue_head(&dev->intr_wq);\r
+ atomic_set(&dev->open_excl, 0);\r
+ atomic_set(&dev->ioctl_excl, 0);\r
+ INIT_LIST_HEAD(&dev->tx_idle);\r
+ INIT_LIST_HEAD(&dev->intr_idle);\r
+\r
+ dev->wq = create_singlethread_workqueue("f_mtp");\r
+ if (!dev->wq) {\r
+ ret = -ENOMEM;\r
+ goto err1;\r
+ }\r
+ INIT_WORK(&dev->send_file_work, send_file_work);\r
+ INIT_WORK(&dev->receive_file_work, receive_file_work);\r
+\r
+ _mtp_dev = dev;\r
+\r
+ ret = misc_register(&mtp_device);\r
+ if (ret)\r
+ goto err2;\r
+\r
+ return 0;\r
+\r
+err2:\r
+ destroy_workqueue(dev->wq);\r
+err1:\r
+ _mtp_dev = NULL;\r
+ kfree(dev);\r
+ printk(KERN_ERR "mtp gadget driver failed to initialize\n");\r
+ return ret;\r
+}\r
+\r
+static int mtp_setup_configfs(struct mtp_instance *fi_mtp)\r
+{\r
+ return __mtp_setup(fi_mtp);\r
+}\r
+\r
+\r
+static void mtp_cleanup(void)\r
+{\r
+ struct mtp_dev *dev = _mtp_dev;\r
+\r
+ if (!dev)\r
+ return;\r
+\r
+ misc_deregister(&mtp_device);\r
+ destroy_workqueue(dev->wq);\r
+ _mtp_dev = NULL;\r
+ kfree(dev);\r
+}\r
+\r
+static struct mtp_instance *to_mtp_instance(struct config_item *item)\r
+{\r
+ return container_of(to_config_group(item), struct mtp_instance,\r
+ func_inst.group);\r
+}\r
+\r
+static void mtp_attr_release(struct config_item *item)\r
+{\r
+ struct mtp_instance *fi_mtp = to_mtp_instance(item);\r
+\r
+ usb_put_function_instance(&fi_mtp->func_inst);\r
+}\r
+\r
+static struct configfs_item_operations mtp_item_ops = {\r
+ .release = mtp_attr_release,\r
+};\r
+\r
+static struct config_item_type mtp_func_type = {\r
+ .ct_item_ops = &mtp_item_ops,\r
+ .ct_owner = THIS_MODULE,\r
+};\r
+\r
+\r
+static struct mtp_instance *to_fi_mtp(struct usb_function_instance *fi)\r
+{\r
+ return container_of(fi, struct mtp_instance, func_inst);\r
+}\r
+\r
+static int mtp_set_inst_name(struct usb_function_instance *fi, const char *name)\r
+{\r
+ struct mtp_instance *fi_mtp;\r
+ char *ptr;\r
+ int name_len;\r
+\r
+ name_len = strlen(name) + 1;\r
+ if (name_len > MAX_INST_NAME_LEN)\r
+ return -ENAMETOOLONG;\r
+\r
+ ptr = kstrndup(name, name_len, GFP_KERNEL);\r
+ if (!ptr)\r
+ return -ENOMEM;\r
+\r
+ fi_mtp = to_fi_mtp(fi);\r
+ fi_mtp->name = ptr;\r
+\r
+ return 0;\r
+}\r
+\r
+static void mtp_free_inst(struct usb_function_instance *fi)\r
+{\r
+ struct mtp_instance *fi_mtp;\r
+\r
+ fi_mtp = to_fi_mtp(fi);\r
+ kfree(fi_mtp->name);\r
+ mtp_cleanup();\r
+ kfree(fi_mtp);\r
+}\r
+\r
+struct usb_function_instance *alloc_inst_mtp_ptp(bool mtp_config)\r
+{\r
+ struct mtp_instance *fi_mtp;\r
+ int ret = 0;\r
+ struct usb_os_desc *descs[1];\r
+ char *names[1];\r
+\r
+ fi_mtp = kzalloc(sizeof(*fi_mtp), GFP_KERNEL);\r
+ if (!fi_mtp)\r
+ return ERR_PTR(-ENOMEM);\r
+ fi_mtp->func_inst.set_inst_name = mtp_set_inst_name;\r
+ fi_mtp->func_inst.free_func_inst = mtp_free_inst;\r
+\r
+ fi_mtp->mtp_os_desc.ext_compat_id = fi_mtp->mtp_ext_compat_id;\r
+ INIT_LIST_HEAD(&fi_mtp->mtp_os_desc.ext_prop);\r
+ descs[0] = &fi_mtp->mtp_os_desc;\r
+ names[0] = "MTP";\r
+\r
+ if (mtp_config) {\r
+ ret = mtp_setup_configfs(fi_mtp);\r
+ if (ret) {\r
+ kfree(fi_mtp);\r
+ pr_err("Error setting MTP\n");\r
+ return ERR_PTR(ret);\r
+ }\r
+ } else\r
+ fi_mtp->dev = _mtp_dev;\r
+\r
+ config_group_init_type_name(&fi_mtp->func_inst.group,\r
+ "", &mtp_func_type);\r
+ usb_os_desc_prepare_interf_dir(&fi_mtp->func_inst.group, 1,\r
+ descs, names, THIS_MODULE);\r
+\r
+ return &fi_mtp->func_inst;\r
+}\r
+EXPORT_SYMBOL_GPL(alloc_inst_mtp_ptp);\r
+\r
+static struct usb_function_instance *mtp_alloc_inst(void)\r
+{\r
+ return alloc_inst_mtp_ptp(true);\r
+}\r
+\r
+static int mtp_ctrlreq_configfs(struct usb_function *f,\r
+ const struct usb_ctrlrequest *ctrl)\r
+{\r
+ return mtp_ctrlrequest(f->config->cdev, ctrl);\r
+}\r
+\r
+static void mtp_free(struct usb_function *f)\r
+{\r
+ /*NO-OP: no function specific resource allocation in mtp_alloc*/\r
+}\r
+\r
+struct usb_function *function_alloc_mtp_ptp(struct usb_function_instance *fi,\r
+ bool mtp_config)\r
+{\r
+ struct mtp_instance *fi_mtp = to_fi_mtp(fi);\r
+ struct mtp_dev *dev;\r
+#ifdef CONFIG_USB_CONFIGFS_UEVENT\r
+ struct usb_function *function;\r
+#endif\r
+\r
+ /*\r
+ * PTP piggybacks on MTP function so make sure we have\r
+ * created MTP function before we associate this PTP\r
+ * function with a gadget configuration.\r
+ */\r
+ if (fi_mtp->dev == NULL) {\r
+ pr_err("Error: Create MTP function before linking"\r
+ " PTP function with a gadget configuration\n");\r
+ pr_err("\t1: Delete existing PTP function if any\n");\r
+ pr_err("\t2: Create MTP function\n");\r
+ pr_err("\t3: Create and symlink PTP function"\r
+ " with a gadget configuration\n");\r
+ return ERR_PTR(-EINVAL); /* Invalid Configuration */\r
+ }\r
+\r
+ dev = fi_mtp->dev;\r
+#ifdef CONFIG_USB_CONFIGFS_UEVENT\r
+ if (mtp_config) {\r
+ function = &dev->function;\r
+ function->name = DRIVER_NAME;\r
+ function->fs_descriptors = fs_mtp_descs;\r
+ function->hs_descriptors = hs_mtp_descs;\r
+ function->ss_descriptors = ss_mtp_descs;\r
+ } else {\r
+ function = &dev->function_ptp;\r
+ function->name = DRIVER_NAME_PTP;\r
+ function->fs_descriptors = fs_ptp_descs;\r
+ function->hs_descriptors = hs_ptp_descs;\r
+ function->ss_descriptors = ss_ptp_descs;\r
+ }\r
+\r
+ function->strings = mtp_strings;\r
+ function->bind = mtp_function_bind;\r
+ function->unbind = mtp_function_unbind;\r
+ function->set_alt = mtp_function_set_alt;\r
+ function->disable = mtp_function_disable;\r
+ function->setup = mtp_ctrlreq_configfs;\r
+ function->free_func = mtp_free;\r
+\r
+ return function;\r
+#else\r
+ dev->function.name = DRIVER_NAME;\r
+ dev->function.strings = mtp_strings;\r
+ if (mtp_config) {\r
+ dev->function.fs_descriptors = fs_mtp_descs;\r
+ dev->function.hs_descriptors = hs_mtp_descs;\r
+ dev->function.ss_descriptors = ss_mtp_descs;\r
+ } else {\r
+ dev->function.fs_descriptors = fs_ptp_descs;\r
+ dev->function.hs_descriptors = hs_ptp_descs;\r
+ dev->function.ss_descriptors = ss_ptp_descs;\r
+ }\r
+ dev->function.bind = mtp_function_bind;\r
+ dev->function.unbind = mtp_function_unbind;\r
+ dev->function.set_alt = mtp_function_set_alt;\r
+ dev->function.disable = mtp_function_disable;\r
+ dev->function.setup = mtp_ctrlreq_configfs;\r
+ dev->function.free_func = mtp_free;\r
+\r
+ return &dev->function;\r
+#endif\r
+}\r
+EXPORT_SYMBOL_GPL(function_alloc_mtp_ptp);\r
+\r
+static struct usb_function *mtp_alloc(struct usb_function_instance *fi)\r
+{\r
+ return function_alloc_mtp_ptp(fi, true);\r
+}\r
+\r
+DECLARE_USB_FUNCTION_INIT(mtp, mtp_alloc_inst, mtp_alloc);\r
+MODULE_LICENSE("GPL");\r
--- /dev/null
+/*\r
+ * Copyright (C) 2014 Google, Inc.\r
+ * Author: Badhri Jagan Sridharan <badhri@android.com>\r
+ *\r
+ * This software is licensed under the terms of the GNU General Public\r
+ * License version 2, as published by the Free Software Foundation, and\r
+ * may be copied, distributed, and modified under those terms.\r
+ *\r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ */\r
+\r
+extern struct usb_function_instance *alloc_inst_mtp_ptp(bool mtp_config);\r
+extern struct usb_function *function_alloc_mtp_ptp(\r
+ struct usb_function_instance *fi, bool mtp_config);\r
--- /dev/null
+/*\r
+ * Gadget Function Driver for PTP\r
+ *\r
+ * Copyright (C) 2014 Google, Inc.\r
+ * Author: Badhri Jagan Sridharan <badhri@android.com>\r
+ *\r
+ * This software is licensed under the terms of the GNU General Public\r
+ * License version 2, as published by the Free Software Foundation, and\r
+ * may be copied, distributed, and modified under those terms.\r
+ *\r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ */\r
+\r
+#include <linux/module.h>\r
+#include <linux/types.h>\r
+\r
+#include <linux/configfs.h>\r
+#include <linux/usb/composite.h>\r
+\r
+#include "f_mtp.h"\r
+\r
+static struct usb_function_instance *ptp_alloc_inst(void)\r
+{\r
+ return alloc_inst_mtp_ptp(false);\r
+}\r
+\r
+static struct usb_function *ptp_alloc(struct usb_function_instance *fi)\r
+{\r
+ return function_alloc_mtp_ptp(fi, false);\r
+}\r
+\r
+DECLARE_USB_FUNCTION_INIT(ptp, ptp_alloc_inst, ptp_alloc);\r
+MODULE_LICENSE("GPL");\r
+MODULE_AUTHOR("Badhri Jagan Sridharan");\r
--- /dev/null
+/*\r
+ * f_uts.c -- USB CDC serial (ACM) function driver\r
+ *\r
+ * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)\r
+ * Copyright (C) 2008 by David Brownell\r
+ * Copyright (C) 2008 by Nokia Corporation\r
+ * Copyright (C) 2009 by Samsung Electronics\r
+ * Author: Michal Nazarewicz (mina86@mina86.com)\r
+ *\r
+ * This software is distributed under the terms of the GNU General\r
+ * Public License ("GPL") as published by the Free Software Foundation,\r
+ * either version 2 of that License or (at your option) any later version.\r
+ */\r
+\r
+/* #define VERBOSE_DEBUG */\r
+\r
+#include <linux/slab.h>\r
+#include <linux/kernel.h>\r
+#include <linux/module.h>\r
+#include <linux/device.h>\r
+#include <linux/err.h>\r
+\r
+#include "u_serial.h"\r
+\r
+\r
+/*\r
+ * This CDC ACM function support just wraps control functions and\r
+ * notifications around the generic serial-over-usb code.\r
+ *\r
+ * Because CDC ACM is standardized by the USB-IF, many host operating\r
+ * systems have drivers for it. Accordingly, ACM is the preferred\r
+ * interop solution for serial-port type connections. The control\r
+ * models are often not necessary, and in any case don't do much in\r
+ * this bare-bones implementation.\r
+ *\r
+ * Note that even MS-Windows has some support for ACM. However, that\r
+ * support is somewhat broken because when you use ACM in a composite\r
+ * device, having multiple interfaces confuses the poor OS. It doesn't\r
+ * seem to understand CDC Union descriptors. The new "association"\r
+ * descriptors (roughly equivalent to CDC Unions) may sometimes help.\r
+ */\r
+\r
+/* UTS_PORT NUM : /dev/ttyGS* port number */\r
+#define UTS_PORT_NUM 2\r
+\r
+struct f_uts {\r
+ struct gserial port;\r
+ u8 ctrl_id, data_id;\r
+ u8 port_num;\r
+\r
+ u8 pending;\r
+\r
+ /* lock is mostly for pending and notify_req ... they get accessed\r
+ * by callbacks both from tty (open/close/break) under its spinlock,\r
+ * and notify_req.complete() which can't use that lock.\r
+ */\r
+ spinlock_t lock;\r
+\r
+ struct usb_ep *notify;\r
+ struct usb_request *notify_req;\r
+\r
+ struct usb_cdc_line_coding port_line_coding; /* 8-N-1 etc */\r
+\r
+ /* SetControlLineState request -- CDC 1.1 section 6.2.14 (INPUT) */\r
+ u16 port_handshake_bits;\r
+#define ACM_CTRL_RTS (1 << 1) /* unused with full duplex */\r
+#define ACM_CTRL_DTR (1 << 0) /* host is ready for data r/w */\r
+\r
+ /* SerialState notification -- CDC 1.1 section 6.3.5 (OUTPUT) */\r
+ u16 serial_state;\r
+#define ACM_CTRL_OVERRUN (1 << 6)\r
+#define ACM_CTRL_PARITY (1 << 5)\r
+#define ACM_CTRL_FRAMING (1 << 4)\r
+#define ACM_CTRL_RI (1 << 3)\r
+#define ACM_CTRL_BRK (1 << 2)\r
+#define ACM_CTRL_DSR (1 << 1)\r
+#define ACM_CTRL_DCD (1 << 0)\r
+};\r
+\r
+static inline struct f_uts *func_to_uts(struct usb_function *f)\r
+{\r
+ return container_of(f, struct f_uts, port.func);\r
+}\r
+\r
+static inline struct f_uts *port_to_uts(struct gserial *p)\r
+{\r
+ return container_of(p, struct f_uts, port);\r
+}\r
+\r
+/*-------------------------------------------------------------------------*/\r
+\r
+/* notification endpoint uses smallish and infrequent fixed-size messages */\r
+\r
+#define GS_NOTIFY_INTERVAL_MS 32\r
+#define GS_NOTIFY_MAXPACKET 10 /* notification + 2 bytes */\r
+\r
+/* interface and class descriptors: */\r
+\r
+static struct usb_interface_assoc_descriptor\r
+uts_iad_descriptor = {\r
+ .bLength = sizeof(uts_iad_descriptor),\r
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,\r
+\r
+ /* .bFirstInterface = DYNAMIC, */\r
+ .bInterfaceCount = 2, // control + data\r
+ .bFunctionClass = USB_CLASS_COMM,\r
+ .bFunctionSubClass = USB_CDC_SUBCLASS_ACM,\r
+ .bFunctionProtocol = USB_CDC_ACM_PROTO_AT_V25TER,\r
+ /* .iFunction = DYNAMIC */\r
+};\r
+\r
+\r
+static struct usb_interface_descriptor uts_control_interface_desc = {\r
+ .bLength = USB_DT_INTERFACE_SIZE,\r
+ .bDescriptorType = USB_DT_INTERFACE,\r
+ /* .bInterfaceNumber = DYNAMIC */\r
+ .bNumEndpoints = 1,\r
+ .bInterfaceClass = USB_CLASS_COMM,\r
+ .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,\r
+ .bInterfaceProtocol = USB_CDC_ACM_PROTO_AT_V25TER,\r
+ /* .iInterface = DYNAMIC */\r
+};\r
+\r
+static struct usb_interface_descriptor uts_data_interface_desc = {\r
+ .bLength = USB_DT_INTERFACE_SIZE,\r
+ .bDescriptorType = USB_DT_INTERFACE,\r
+ /* .bInterfaceNumber = DYNAMIC */\r
+ .bNumEndpoints = 2,\r
+ .bInterfaceClass = USB_CLASS_CDC_DATA,\r
+ .bInterfaceSubClass = 0,\r
+ .bInterfaceProtocol = 0,\r
+ /* .iInterface = DYNAMIC */\r
+};\r
+\r
+static struct usb_cdc_header_desc uts_header_desc = {\r
+ .bLength = sizeof(uts_header_desc),\r
+ .bDescriptorType = USB_DT_CS_INTERFACE,\r
+ .bDescriptorSubType = USB_CDC_HEADER_TYPE,\r
+ .bcdCDC = cpu_to_le16(0x0110),\r
+};\r
+\r
+static struct usb_cdc_call_mgmt_descriptor\r
+uts_call_mgmt_descriptor = {\r
+ .bLength = sizeof(uts_call_mgmt_descriptor),\r
+ .bDescriptorType = USB_DT_CS_INTERFACE,\r
+ .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,\r
+ .bmCapabilities = 0,\r
+ /* .bDataInterface = DYNAMIC */\r
+};\r
+\r
+static struct usb_cdc_acm_descriptor uts_descriptor = {\r
+ .bLength = sizeof(uts_descriptor),\r
+ .bDescriptorType = USB_DT_CS_INTERFACE,\r
+ .bDescriptorSubType = USB_CDC_ACM_TYPE,\r
+ .bmCapabilities = USB_CDC_CAP_LINE,\r
+};\r
+\r
+static struct usb_cdc_union_desc uts_union_desc = {\r
+ .bLength = sizeof(uts_union_desc),\r
+ .bDescriptorType = USB_DT_CS_INTERFACE,\r
+ .bDescriptorSubType = USB_CDC_UNION_TYPE,\r
+ /* .bMasterInterface0 = DYNAMIC */\r
+ /* .bSlaveInterface0 = DYNAMIC */\r
+};\r
+\r
+/* full speed support: */\r
+\r
+static struct usb_endpoint_descriptor uts_fs_notify_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_IN,\r
+ .bmAttributes = USB_ENDPOINT_XFER_INT,\r
+ .wMaxPacketSize = cpu_to_le16(GS_NOTIFY_MAXPACKET),\r
+ .bInterval = GS_NOTIFY_INTERVAL_MS,\r
+};\r
+\r
+static struct usb_endpoint_descriptor uts_fs_in_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_IN,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+};\r
+\r
+static struct usb_endpoint_descriptor uts_fs_out_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_OUT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+};\r
+\r
+static struct usb_descriptor_header *uts_fs_function[] = {\r
+ (struct usb_descriptor_header *) &uts_iad_descriptor,\r
+ (struct usb_descriptor_header *) &uts_control_interface_desc,\r
+ (struct usb_descriptor_header *) &uts_header_desc,\r
+ (struct usb_descriptor_header *) &uts_call_mgmt_descriptor,\r
+ (struct usb_descriptor_header *) &uts_descriptor,\r
+ (struct usb_descriptor_header *) &uts_union_desc,\r
+ (struct usb_descriptor_header *) &uts_fs_notify_desc,\r
+ (struct usb_descriptor_header *) &uts_data_interface_desc,\r
+ (struct usb_descriptor_header *) &uts_fs_in_desc,\r
+ (struct usb_descriptor_header *) &uts_fs_out_desc,\r
+ NULL,\r
+};\r
+\r
+/* high speed support: */\r
+static struct usb_endpoint_descriptor uts_hs_notify_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bEndpointAddress = USB_DIR_IN,\r
+ .bmAttributes = USB_ENDPOINT_XFER_INT,\r
+ .wMaxPacketSize = cpu_to_le16(GS_NOTIFY_MAXPACKET),\r
+ .bInterval = USB_MS_TO_HS_INTERVAL(GS_NOTIFY_INTERVAL_MS),\r
+};\r
+\r
+static struct usb_endpoint_descriptor uts_hs_in_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = cpu_to_le16(512),\r
+};\r
+\r
+static struct usb_endpoint_descriptor uts_hs_out_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = cpu_to_le16(512),\r
+};\r
+\r
+static struct usb_descriptor_header *uts_hs_function[] = {\r
+ (struct usb_descriptor_header *) &uts_iad_descriptor,\r
+ (struct usb_descriptor_header *) &uts_control_interface_desc,\r
+ (struct usb_descriptor_header *) &uts_header_desc,\r
+ (struct usb_descriptor_header *) &uts_call_mgmt_descriptor,\r
+ (struct usb_descriptor_header *) &uts_descriptor,\r
+ (struct usb_descriptor_header *) &uts_union_desc,\r
+ (struct usb_descriptor_header *) &uts_hs_notify_desc,\r
+ (struct usb_descriptor_header *) &uts_data_interface_desc,\r
+ (struct usb_descriptor_header *) &uts_hs_in_desc,\r
+ (struct usb_descriptor_header *) &uts_hs_out_desc,\r
+ NULL,\r
+};\r
+\r
+static struct usb_endpoint_descriptor uts_ss_in_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = cpu_to_le16(1024),\r
+};\r
+\r
+static struct usb_endpoint_descriptor uts_ss_out_desc = {\r
+ .bLength = USB_DT_ENDPOINT_SIZE,\r
+ .bDescriptorType = USB_DT_ENDPOINT,\r
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,\r
+ .wMaxPacketSize = cpu_to_le16(1024),\r
+};\r
+\r
+static struct usb_ss_ep_comp_descriptor uts_ss_bulk_comp_desc = {\r
+ .bLength = sizeof(uts_ss_bulk_comp_desc),\r
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,\r
+};\r
+\r
+static struct usb_descriptor_header *uts_ss_function[] = {\r
+ (struct usb_descriptor_header *) &uts_iad_descriptor,\r
+ (struct usb_descriptor_header *) &uts_control_interface_desc,\r
+ (struct usb_descriptor_header *) &uts_header_desc,\r
+ (struct usb_descriptor_header *) &uts_call_mgmt_descriptor,\r
+ (struct usb_descriptor_header *) &uts_descriptor,\r
+ (struct usb_descriptor_header *) &uts_union_desc,\r
+ (struct usb_descriptor_header *) &uts_hs_notify_desc,\r
+ (struct usb_descriptor_header *) &uts_ss_bulk_comp_desc,\r
+ (struct usb_descriptor_header *) &uts_data_interface_desc,\r
+ (struct usb_descriptor_header *) &uts_ss_in_desc,\r
+ (struct usb_descriptor_header *) &uts_ss_bulk_comp_desc,\r
+ (struct usb_descriptor_header *) &uts_ss_out_desc,\r
+ (struct usb_descriptor_header *) &uts_ss_bulk_comp_desc,\r
+ NULL,\r
+};\r
+\r
+/* string descriptors: */\r
+\r
+#define ACM_CTRL_IDX 0\r
+#define ACM_DATA_IDX 1\r
+#define ACM_IAD_IDX 2\r
+\r
+/* static strings, in UTF-8 */\r
+static struct usb_string uts_string_defs[] = {\r
+ [ACM_CTRL_IDX].s = "CDC Abstract Control Model (ACM2)",\r
+ [ACM_DATA_IDX].s = "CDC ACM2 Data",\r
+ [ACM_IAD_IDX].s = "CDC Serial",\r
+ { } /* end of list */\r
+};\r
+\r
+static struct usb_gadget_strings uts_string_table = {\r
+ .language = 0x0409, /* en-us */\r
+ .strings = uts_string_defs,\r
+};\r
+\r
+static struct usb_gadget_strings *uts_strings[] = {\r
+ &uts_string_table,\r
+ NULL,\r
+};\r
+\r
+/*-------------------------------------------------------------------------*/\r
+\r
+/* ACM control ... data handling is delegated to tty library code.\r
+ * The main task of this function is to activate and deactivate\r
+ * that code based on device state; track parameters like line\r
+ * speed, handshake state, and so on; and issue notifications.\r
+ */\r
+\r
+static void uts_complete_set_line_coding(struct usb_ep *ep,\r
+ struct usb_request *req)\r
+{\r
+ struct f_uts *uts = ep->driver_data;\r
+ struct usb_composite_dev *cdev = uts->port.func.config->cdev;\r
+\r
+ if (req->status != 0) {\r
+ dev_dbg(&cdev->gadget->dev, "uts ttyGS%d completion, err %d\n",\r
+ uts->port_num, req->status);\r
+ return;\r
+ }\r
+\r
+ /* normal completion */\r
+ if (req->actual != sizeof(uts->port_line_coding)) {\r
+ dev_dbg(&cdev->gadget->dev, "uts ttyGS%d short resp, len %d\n",\r
+ uts->port_num, req->actual);\r
+ usb_ep_set_halt(ep);\r
+ } else {\r
+ struct usb_cdc_line_coding *value = req->buf;\r
+\r
+ /* REVISIT: we currently just remember this data.\r
+ * If we change that, (a) validate it first, then\r
+ * (b) update whatever hardware needs updating,\r
+ * (c) worry about locking. This is information on\r
+ * the order of 9600-8-N-1 ... most of which means\r
+ * nothing unless we control a real RS232 line.\r
+ */\r
+ uts->port_line_coding = *value;\r
+ }\r
+}\r
+\r
+static int uts_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)\r
+{\r
+ struct f_uts *uts = func_to_uts(f);\r
+ struct usb_composite_dev *cdev = f->config->cdev;\r
+ struct usb_request *req = cdev->req;\r
+ int value = -EOPNOTSUPP;\r
+ u16 w_index = le16_to_cpu(ctrl->wIndex);\r
+ u16 w_value = le16_to_cpu(ctrl->wValue);\r
+ u16 w_length = le16_to_cpu(ctrl->wLength);\r
+\r
+ /* composite driver infrastructure handles everything except\r
+ * CDC class messages; interface activation uses set_alt().\r
+ *\r
+ * Note CDC spec table 4 lists the ACM request profile. It requires\r
+ * encapsulated command support ... we don't handle any, and respond\r
+ * to them by stalling. Options include get/set/clear comm features\r
+ * (not that useful) and SEND_BREAK.\r
+ */\r
+ switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {\r
+\r
+ /* SET_LINE_CODING ... just read and save what the host sends */\r
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)\r
+ | USB_CDC_REQ_SET_LINE_CODING:\r
+ if (w_length != sizeof(struct usb_cdc_line_coding)\r
+ || w_index != uts->ctrl_id)\r
+ goto invalid;\r
+\r
+ value = w_length;\r
+ cdev->gadget->ep0->driver_data = uts;\r
+ req->complete = uts_complete_set_line_coding;\r
+ break;\r
+\r
+ /* GET_LINE_CODING ... return what host sent, or initial value */\r
+ case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)\r
+ | USB_CDC_REQ_GET_LINE_CODING:\r
+ if (w_index != uts->ctrl_id)\r
+ goto invalid;\r
+\r
+ value = min_t(unsigned int, w_length,\r
+ sizeof(struct usb_cdc_line_coding));\r
+ memcpy(req->buf, &uts->port_line_coding, value);\r
+ break;\r
+\r
+ /* SET_CONTROL_LINE_STATE ... save what the host sent */\r
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)\r
+ | USB_CDC_REQ_SET_CONTROL_LINE_STATE:\r
+ if (w_index != uts->ctrl_id)\r
+ goto invalid;\r
+\r
+ value = 0;\r
+\r
+ /* FIXME we should not allow data to flow until the\r
+ * host sets the ACM_CTRL_DTR bit; and when it clears\r
+ * that bit, we should return to that no-flow state.\r
+ */\r
+ uts->port_handshake_bits = w_value;\r
+ break;\r
+\r
+ default:\r
+invalid:\r
+ dev_vdbg(&cdev->gadget->dev,\r
+ "invalid control req%02x.%02x v%04x i%04x l%d\n",\r
+ ctrl->bRequestType, ctrl->bRequest,\r
+ w_value, w_index, w_length);\r
+ }\r
+\r
+ /* respond with data transfer or status phase? */\r
+ if (value >= 0) {\r
+ dev_dbg(&cdev->gadget->dev,\r
+ "uts ttyGS%d req%02x.%02x v%04x i%04x l%d\n",\r
+ uts->port_num, ctrl->bRequestType, ctrl->bRequest,\r
+ w_value, w_index, w_length);\r
+ req->zero = 0;\r
+ req->length = value;\r
+ value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);\r
+ if (value < 0)\r
+ ERROR(cdev, "uts response on ttyGS%d, err %d\n",\r
+ uts->port_num, value);\r
+ }\r
+\r
+ /* device either stalls (value < 0) or reports success */\r
+ return value;\r
+}\r
+\r
+static int uts_set_alt(struct usb_function *f, unsigned int intf, unsigned int alt)\r
+{\r
+ struct f_uts *uts = func_to_uts(f);\r
+ struct usb_composite_dev *cdev = f->config->cdev;\r
+\r
+ /* we know alt == 0, so this is an activation or a reset */\r
+\r
+ if (intf == uts->ctrl_id) {\r
+ dev_vdbg(&cdev->gadget->dev,\r
+ "reset uts control interface %d\n", intf);\r
+ usb_ep_disable(uts->notify);\r
+\r
+ if (!uts->notify->desc)\r
+ if (config_ep_by_speed(cdev->gadget, f, uts->notify))\r
+ return -EINVAL;\r
+\r
+ usb_ep_enable(uts->notify);\r
+\r
+ } else if (intf == uts->data_id) {\r
+ if (uts->notify->enabled) {\r
+ dev_dbg(&cdev->gadget->dev,\r
+ "reset uts ttyGS%d\n", uts->port_num);\r
+ gserial_disconnect(&uts->port);\r
+ }\r
+ if (!uts->port.in->desc || !uts->port.out->desc) {\r
+ dev_dbg(&cdev->gadget->dev,\r
+ "activate uts ttyGS%d\n", uts->port_num);\r
+ if (config_ep_by_speed(cdev->gadget, f,\r
+ uts->port.in) ||\r
+ config_ep_by_speed(cdev->gadget, f,\r
+ uts->port.out)) {\r
+ uts->port.in->desc = NULL;\r
+ uts->port.out->desc = NULL;\r
+ return -EINVAL;\r
+ }\r
+ }\r
+ gserial_connect(&uts->port, uts->port_num);\r
+\r
+ } else\r
+ return -EINVAL;\r
+\r
+ return 0;\r
+}\r
+\r
+static void uts_disable(struct usb_function *f)\r
+{\r
+ struct f_uts *uts = func_to_uts(f);\r
+ struct usb_composite_dev *cdev = f->config->cdev;\r
+\r
+ dev_dbg(&cdev->gadget->dev, "uts ttyGS%d deactivated\n", uts->port_num);\r
+ gserial_disconnect(&uts->port);\r
+ usb_ep_disable(uts->notify);\r
+}\r
+\r
+/*-------------------------------------------------------------------------*/\r
+\r
+/**\r
+ * uts_cdc_notify - issue CDC notification to host\r
+ * @uts: wraps host to be notified\r
+ * @type: notification type\r
+ * @value: Refer to cdc specs, wValue field.\r
+ * @data: data to be sent\r
+ * @length: size of data\r
+ * Context: irqs blocked, uts->lock held, uts_notify_req non-null\r
+ *\r
+ * Returns zero on success or a negative errno.\r
+ *\r
+ * See section 6.3.5 of the CDC 1.1 specification for information\r
+ * about the only notification we issue: SerialState change.\r
+ */\r
+static int uts_cdc_notify(struct f_uts *uts, u8 type, u16 value,\r
+ void *data, unsigned int length)\r
+{\r
+ struct usb_ep *ep = uts->notify;\r
+ struct usb_request *req;\r
+ struct usb_cdc_notification *notify;\r
+ const unsigned int len = sizeof(*notify) + length;\r
+ void *buf;\r
+ int status;\r
+\r
+ req = uts->notify_req;\r
+ uts->notify_req = NULL;\r
+ uts->pending = false;\r
+\r
+ req->length = len;\r
+ notify = req->buf;\r
+ buf = notify + 1;\r
+\r
+ notify->bmRequestType = USB_DIR_IN | USB_TYPE_CLASS\r
+ | USB_RECIP_INTERFACE;\r
+ notify->bNotificationType = type;\r
+ notify->wValue = cpu_to_le16(value);\r
+ notify->wIndex = cpu_to_le16(uts->ctrl_id);\r
+ notify->wLength = cpu_to_le16(length);\r
+ memcpy(buf, data, length);\r
+\r
+ /* ep_queue() can complete immediately if it fills the fifo... */\r
+ spin_unlock(&uts->lock);\r
+ status = usb_ep_queue(ep, req, GFP_ATOMIC);\r
+ spin_lock(&uts->lock);\r
+\r
+ if (status < 0) {\r
+ ERROR(uts->port.func.config->cdev,\r
+ "uts ttyGS%d can't notify serial state, %d\n",\r
+ uts->port_num, status);\r
+ uts->notify_req = req;\r
+ }\r
+\r
+ return status;\r
+}\r
+\r
+static int uts_notify_serial_state(struct f_uts *uts)\r
+{\r
+ struct usb_composite_dev *cdev = uts->port.func.config->cdev;\r
+ int status;\r
+ __le16 serial_state;\r
+\r
+ spin_lock(&uts->lock);\r
+ if (uts->notify_req) {\r
+ dev_dbg(&cdev->gadget->dev, "uts ttyGS%d serial state %04x\n",\r
+ uts->port_num, uts->serial_state);\r
+ serial_state = cpu_to_le16(uts->serial_state);\r
+ status = uts_cdc_notify(uts, USB_CDC_NOTIFY_SERIAL_STATE,\r
+ 0, &serial_state, sizeof(uts->serial_state));\r
+ } else {\r
+ uts->pending = true;\r
+ status = 0;\r
+ }\r
+ spin_unlock(&uts->lock);\r
+ return status;\r
+}\r
+\r
+static void uts_cdc_notify_complete(struct usb_ep *ep, struct usb_request *req)\r
+{\r
+ struct f_uts *uts = req->context;\r
+ u8 doit = false;\r
+\r
+ /* on this call path we do NOT hold the port spinlock,\r
+ * which is why ACM needs its own spinlock\r
+ */\r
+ spin_lock(&uts->lock);\r
+ if (req->status != -ESHUTDOWN)\r
+ doit = uts->pending;\r
+ uts->notify_req = req;\r
+ spin_unlock(&uts->lock);\r
+\r
+ if (doit)\r
+ uts_notify_serial_state(uts);\r
+}\r
+\r
+/* connect == the TTY link is open */\r
+\r
+static void uts_connect(struct gserial *port)\r
+{\r
+ struct f_uts *uts = port_to_uts(port);\r
+\r
+ uts->serial_state |= ACM_CTRL_DSR | ACM_CTRL_DCD;\r
+ uts_notify_serial_state(uts);\r
+}\r
+\r
+static void uts_disconnect(struct gserial *port)\r
+{\r
+ struct f_uts *uts = port_to_uts(port);\r
+\r
+ uts->serial_state &= ~(ACM_CTRL_DSR | ACM_CTRL_DCD);\r
+ uts_notify_serial_state(uts);\r
+}\r
+\r
+static int uts_send_break(struct gserial *port, int duration)\r
+{\r
+ struct f_uts *uts = port_to_uts(port);\r
+ u16 state;\r
+\r
+ state = uts->serial_state;\r
+ state &= ~ACM_CTRL_BRK;\r
+ if (duration)\r
+ state |= ACM_CTRL_BRK;\r
+\r
+ uts->serial_state = state;\r
+ return uts_notify_serial_state(uts);\r
+}\r
+\r
+/*-------------------------------------------------------------------------*/\r
+\r
+/* ACM function driver setup/binding */\r
+static int\r
+uts_bind(struct usb_configuration *c, struct usb_function *f)\r
+{\r
+ struct usb_composite_dev *cdev = c->cdev;\r
+ struct f_uts *uts = func_to_uts(f);\r
+ struct usb_string *us;\r
+ int status;\r
+ struct usb_ep *ep;\r
+\r
+ /* REVISIT might want instance-specific strings to help\r
+ * distinguish instances ...\r
+ */\r
+\r
+ /* maybe allocate device-global string IDs, and patch descriptors */\r
+ us = usb_gstrings_attach(cdev, uts_strings,\r
+ ARRAY_SIZE(uts_string_defs));\r
+ if (IS_ERR(us))\r
+ return PTR_ERR(us);\r
+ uts_control_interface_desc.iInterface = us[ACM_CTRL_IDX].id;\r
+ uts_data_interface_desc.iInterface = us[ACM_DATA_IDX].id;\r
+ uts_iad_descriptor.iFunction = us[ACM_IAD_IDX].id;\r
+\r
+ /* allocate instance-specific interface IDs, and patch descriptors */\r
+ status = usb_interface_id(c, f);\r
+ if (status < 0)\r
+ goto fail;\r
+ uts->ctrl_id = status;\r
+ uts_iad_descriptor.bFirstInterface = status;\r
+\r
+ uts_control_interface_desc.bInterfaceNumber = status;\r
+ uts_union_desc .bMasterInterface0 = status;\r
+\r
+ status = usb_interface_id(c, f);\r
+ if (status < 0)\r
+ goto fail;\r
+ uts->data_id = status;\r
+\r
+ uts_data_interface_desc.bInterfaceNumber = status;\r
+ uts_union_desc.bSlaveInterface0 = status;\r
+ uts_call_mgmt_descriptor.bDataInterface = status;\r
+\r
+ status = -ENODEV;\r
+\r
+ /* allocate instance-specific endpoints */\r
+ ep = usb_ep_autoconfig(cdev->gadget, &uts_fs_in_desc);\r
+ if (!ep)\r
+ goto fail;\r
+ uts->port.in = ep;\r
+\r
+ ep = usb_ep_autoconfig(cdev->gadget, &uts_fs_out_desc);\r
+ if (!ep)\r
+ goto fail;\r
+ uts->port.out = ep;\r
+\r
+ ep = usb_ep_autoconfig(cdev->gadget, &uts_fs_notify_desc);\r
+ if (!ep)\r
+ goto fail;\r
+ uts->notify = ep;\r
+\r
+ /* allocate notification */\r
+ uts->notify_req = gs_alloc_req(ep,\r
+ sizeof(struct usb_cdc_notification) + 2,\r
+ GFP_KERNEL);\r
+ if (!uts->notify_req)\r
+ goto fail;\r
+\r
+ uts->notify_req->complete = uts_cdc_notify_complete;\r
+ uts->notify_req->context = uts;\r
+\r
+ /* support all relevant hardware speeds... we expect that when\r
+ * hardware is dual speed, all bulk-capable endpoints work at\r
+ * both speeds\r
+ */\r
+ uts_hs_in_desc.bEndpointAddress = uts_fs_in_desc.bEndpointAddress;\r
+ uts_hs_out_desc.bEndpointAddress = uts_fs_out_desc.bEndpointAddress;\r
+ uts_hs_notify_desc.bEndpointAddress =\r
+ uts_fs_notify_desc.bEndpointAddress;\r
+\r
+ uts_ss_in_desc.bEndpointAddress = uts_fs_in_desc.bEndpointAddress;\r
+ uts_ss_out_desc.bEndpointAddress = uts_fs_out_desc.bEndpointAddress;\r
+\r
+ status = usb_assign_descriptors(f, uts_fs_function, uts_hs_function,\r
+ uts_ss_function, NULL);\r
+ if (status)\r
+ goto fail;\r
+\r
+ dev_dbg(&cdev->gadget->dev,\r
+ "uts ttyGS%d: %s speed IN/%s OUT/%s NOTIFY/%s\n",\r
+ uts->port_num,\r
+ gadget_is_superspeed(c->cdev->gadget) ? "super" :\r
+ gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",\r
+ uts->port.in->name, uts->port.out->name,\r
+ uts->notify->name);\r
+ return 0;\r
+\r
+fail:\r
+ if (uts->notify_req)\r
+ gs_free_req(uts->notify, uts->notify_req);\r
+\r
+ ERROR(cdev, "%s/%p: can't bind, err %d\n", f->name, f, status);\r
+\r
+ return status;\r
+}\r
+\r
+static void uts_unbind(struct usb_configuration *c, struct usb_function *f)\r
+{\r
+ struct f_uts *uts = func_to_uts(f);\r
+\r
+ uts_string_defs[0].id = 0;\r
+ usb_free_all_descriptors(f);\r
+ if (uts->notify_req)\r
+ gs_free_req(uts->notify, uts->notify_req);\r
+}\r
+\r
+static void uts_free_func(struct usb_function *f)\r
+{\r
+ struct f_uts *uts = func_to_uts(f);\r
+\r
+ kfree(uts);\r
+}\r
+\r
+static struct usb_function *uts_alloc_func(struct usb_function_instance *fi)\r
+{\r
+ struct f_serial_opts *opts;\r
+ struct f_uts *uts;\r
+\r
+ uts = kzalloc(sizeof(*uts), GFP_KERNEL);\r
+ if (!uts)\r
+ return ERR_PTR(-ENOMEM);\r
+\r
+ spin_lock_init(&uts->lock);\r
+\r
+ uts->port.connect = uts_connect;\r
+ uts->port.disconnect = uts_disconnect;\r
+ uts->port.send_break = uts_send_break;\r
+\r
+ uts->port.func.name = "uts";\r
+ uts->port.func.strings = uts_strings;\r
+ /* descriptors are per-instance copies */\r
+ uts->port.func.bind = uts_bind;\r
+ uts->port.func.set_alt = uts_set_alt;\r
+ uts->port.func.setup = uts_setup;\r
+ uts->port.func.disable = uts_disable;\r
+\r
+ opts = container_of(fi, struct f_serial_opts, func_inst);\r
+ uts->port_num = opts->port_num;\r
+ uts->port.func.unbind = uts_unbind;\r
+ uts->port.func.free_func = uts_free_func;\r
+\r
+ return &uts->port.func;\r
+}\r
+\r
+static inline struct f_serial_opts *to_f_serial_opts(struct config_item *item)\r
+{\r
+ return container_of(to_config_group(item), struct f_serial_opts,\r
+ func_inst.group);\r
+}\r
+\r
+static void uts_attr_release(struct config_item *item)\r
+{\r
+ struct f_serial_opts *opts = to_f_serial_opts(item);\r
+\r
+ usb_put_function_instance(&opts->func_inst);\r
+}\r
+\r
+static struct configfs_item_operations uts_item_ops = {\r
+ .release = uts_attr_release,\r
+};\r
+\r
+static ssize_t f_uts_port_num_show(struct config_item *item, char *page)\r
+{\r
+ return sprintf(page, "%u\n", to_f_serial_opts(item)->port_num);\r
+}\r
+\r
+CONFIGFS_ATTR_RO(f_uts_, port_num);\r
+\r
+static struct configfs_attribute *uts_attrs[] = {\r
+ &f_uts_attr_port_num,\r
+ NULL,\r
+};\r
+\r
+static struct config_item_type uts_func_type = {\r
+ .ct_item_ops = &uts_item_ops,\r
+ .ct_attrs = uts_attrs,\r
+ .ct_owner = THIS_MODULE,\r
+};\r
+\r
+static void uts_free_instance(struct usb_function_instance *fi)\r
+{\r
+ struct f_serial_opts *opts;\r
+\r
+ opts = container_of(fi, struct f_serial_opts, func_inst);\r
+ gserial_free_line(opts->port_num);\r
+ kfree(opts);\r
+}\r
+\r
+static struct usb_function_instance *uts_alloc_instance(void)\r
+{\r
+ struct f_serial_opts *opts;\r
+ int ret;\r
+\r
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);\r
+ if (!opts)\r
+ return ERR_PTR(-ENOMEM);\r
+ opts->func_inst.free_func_inst = uts_free_instance;\r
+ opts->port_num = UTS_PORT_NUM;\r
+ ret = gserial_alloc_line(&opts->port_num);\r
+ if (ret) {\r
+ kfree(opts);\r
+ return ERR_PTR(ret);\r
+ }\r
+ config_group_init_type_name(&opts->func_inst.group, "",\r
+ &uts_func_type);\r
+ return &opts->func_inst;\r
+}\r
+DECLARE_USB_FUNCTION_INIT(uts, uts_alloc_instance, uts_alloc_func);\r
+MODULE_LICENSE("GPL");\r
--- /dev/null
+/*
+ * Gadget Function Driver for MTP
+ *
+ * Copyright (C) 2010 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __LINUX_USB_F_MTP_H
+#define __LINUX_USB_F_MTP_H
+
+#include <uapi/linux/usb/f_mtp.h>
+
+#endif /* __LINUX_USB_F_MTP_H */
--- /dev/null
+/*
+ * Gadget Function Driver for MTP
+ *
+ * Copyright (C) 2010 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __LINUX_USB_F_MTP_H
+#define __LINUX_USB_F_MTP_H
+
+#include <uapi/linux/usb/f_mtp.h>
+
+#endif /* __LINUX_USB_F_MTP_H */
* to a_wait_vfall
*/
struct otg_fsm {
+ int reset;
+
/* Input */
int id;
int adp_change;
--- /dev/null
+/*
+ * Gadget Function Driver for MTP
+ *
+ * Copyright (C) 2010 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _UAPI_LINUX_USB_F_MTP_H
+#define _UAPI_LINUX_USB_F_MTP_H
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+struct mtp_file_range {
+ /* file descriptor for file to transfer */
+ int fd;
+ /* offset in file for start of transfer */
+ loff_t offset;
+ /* number of bytes to transfer */
+ int64_t length;
+ /* MTP command ID for data header,
+ * used only for MTP_SEND_FILE_WITH_HEADER
+ */
+ uint16_t command;
+ /* MTP transaction ID for data header,
+ * used only for MTP_SEND_FILE_WITH_HEADER
+ */
+ uint32_t transaction_id;
+};
+
+struct mtp_event {
+ /* size of the event */
+ size_t length;
+ /* event data to send */
+ void *data;
+};
+
+/* Sends the specified file range to the host */
+#define MTP_SEND_FILE _IOW('M', 0, struct mtp_file_range)
+/* Receives data from the host and writes it to a file.
+ * The file is created if it does not exist.
+ */
+#define MTP_RECEIVE_FILE _IOW('M', 1, struct mtp_file_range)
+/* Sends an event to the host via the interrupt endpoint */
+#define MTP_SEND_EVENT _IOW('M', 3, struct mtp_event)
+/* Sends the specified file range to the host,
+ * with a 12 byte MTP data packet header at the beginning.
+ */
+#define MTP_SEND_FILE_WITH_HEADER _IOW('M', 4, struct mtp_file_range)
+
+#endif /* _UAPI_LINUX_USB_F_MTP_H */
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff