X-Git-Url: https://git.stricted.de/?p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git;a=blobdiff_plain;f=drivers%2Fmfd%2Fomap-usb-host.c;h=759fae3ca7fb0dba592ab808d036f889bf96f922;hp=4febc5c7fdeece4a87be9c2dca0eb642357d4cc7;hb=b40a831c0f1d1cdd9342c5bf09f259d0834c442f;hpb=9b3539e0e545e4c2f338acfc1ce52033a6f5e7f7 diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c index 4febc5c7fdee..759fae3ca7fb 100644 --- a/drivers/mfd/omap-usb-host.c +++ b/drivers/mfd/omap-usb-host.c @@ -1,8 +1,9 @@ /** * omap-usb-host.c - The USBHS core driver for OMAP EHCI & OHCI * - * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com + * Copyright (C) 2011-2013 Texas Instruments Incorporated - http://www.ti.com * Author: Keshava Munegowda + * Author: Roger Quadros * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 of @@ -27,6 +28,9 @@ #include #include #include +#include +#include +#include #include "omap-usb.h" @@ -137,6 +141,49 @@ static inline u8 usbhs_readb(void __iomem *base, u8 reg) /*-------------------------------------------------------------------------*/ +/** + * Map 'enum usbhs_omap_port_mode' found in + * to the device tree binding portN-mode found in + * 'Documentation/devicetree/bindings/mfd/omap-usb-host.txt' + */ +static const char * const port_modes[] = { + [OMAP_USBHS_PORT_MODE_UNUSED] = "", + [OMAP_EHCI_PORT_MODE_PHY] = "ehci-phy", + [OMAP_EHCI_PORT_MODE_TLL] = "ehci-tll", + [OMAP_EHCI_PORT_MODE_HSIC] = "ehci-hsic", + [OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0] = "ohci-phy-6pin-datse0", + [OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM] = "ohci-phy-6pin-dpdm", + [OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0] = "ohci-phy-3pin-datse0", + [OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM] = "ohci-phy-4pin-dpdm", + [OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0] = "ohci-tll-6pin-datse0", + [OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM] = "ohci-tll-6pin-dpdm", + [OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0] = "ohci-tll-3pin-datse0", + [OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM] = "ohci-tll-4pin-dpdm", + [OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0] = "ohci-tll-2pin-datse0", + [OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM] = "ohci-tll-2pin-dpdm", +}; + +/** + * omap_usbhs_get_dt_port_mode - Get the 'enum usbhs_omap_port_mode' + * from the port mode string. + * @mode: The port mode string, usually obtained from device tree. + * + * The function returns the 'enum usbhs_omap_port_mode' that matches the + * provided port mode string as per the port_modes table. + * If no match is found it returns -ENODEV + */ +static const int omap_usbhs_get_dt_port_mode(const char *mode) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(port_modes); i++) { + if (!strcmp(mode, port_modes[i])) + return i; + } + + return -ENODEV; +} + static struct platform_device *omap_usbhs_alloc_child(const char *name, struct resource *res, int num_resources, void *pdata, size_t pdata_size, struct device *dev) @@ -278,7 +325,7 @@ static int usbhs_runtime_resume(struct device *dev) dev_dbg(dev, "usbhs_runtime_resume\n"); - omap_tll_enable(); + omap_tll_enable(pdata); if (!IS_ERR(omap->ehci_logic_fck)) clk_enable(omap->ehci_logic_fck); @@ -353,7 +400,7 @@ static int usbhs_runtime_suspend(struct device *dev) if (!IS_ERR(omap->ehci_logic_fck)) clk_disable(omap->ehci_logic_fck); - omap_tll_disable(); + omap_tll_disable(pdata); return 0; } @@ -430,24 +477,10 @@ static unsigned omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap *omap, static void omap_usbhs_init(struct device *dev) { struct usbhs_hcd_omap *omap = dev_get_drvdata(dev); - struct usbhs_omap_platform_data *pdata = omap->pdata; unsigned reg; dev_dbg(dev, "starting TI HSUSB Controller\n"); - if (pdata->phy_reset) { - if (gpio_is_valid(pdata->reset_gpio_port[0])) - gpio_request_one(pdata->reset_gpio_port[0], - GPIOF_OUT_INIT_LOW, "USB1 PHY reset"); - - if (gpio_is_valid(pdata->reset_gpio_port[1])) - gpio_request_one(pdata->reset_gpio_port[1], - GPIOF_OUT_INIT_LOW, "USB2 PHY reset"); - - /* Hold the PHY in RESET for enough time till DIR is high */ - udelay(10); - } - pm_runtime_get_sync(dev); reg = usbhs_read(omap->uhh_base, OMAP_UHH_HOSTCONFIG); @@ -476,36 +509,59 @@ static void omap_usbhs_init(struct device *dev) dev_dbg(dev, "UHH setup done, uhh_hostconfig=%x\n", reg); pm_runtime_put_sync(dev); - if (pdata->phy_reset) { - /* Hold the PHY in RESET for enough time till - * PHY is settled and ready - */ - udelay(10); +} + +static int usbhs_omap_get_dt_pdata(struct device *dev, + struct usbhs_omap_platform_data *pdata) +{ + int ret, i; + struct device_node *node = dev->of_node; - if (gpio_is_valid(pdata->reset_gpio_port[0])) - gpio_set_value_cansleep - (pdata->reset_gpio_port[0], 1); + ret = of_property_read_u32(node, "num-ports", &pdata->nports); + if (ret) + pdata->nports = 0; - if (gpio_is_valid(pdata->reset_gpio_port[1])) - gpio_set_value_cansleep - (pdata->reset_gpio_port[1], 1); + if (pdata->nports > OMAP3_HS_USB_PORTS) { + dev_warn(dev, "Too many num_ports <%d> in device tree. Max %d\n", + pdata->nports, OMAP3_HS_USB_PORTS); + return -ENODEV; } -} -static void omap_usbhs_deinit(struct device *dev) -{ - struct usbhs_hcd_omap *omap = dev_get_drvdata(dev); - struct usbhs_omap_platform_data *pdata = omap->pdata; + /* get port modes */ + for (i = 0; i < OMAP3_HS_USB_PORTS; i++) { + char prop[11]; + const char *mode; - if (pdata->phy_reset) { - if (gpio_is_valid(pdata->reset_gpio_port[0])) - gpio_free(pdata->reset_gpio_port[0]); + pdata->port_mode[i] = OMAP_USBHS_PORT_MODE_UNUSED; + + snprintf(prop, sizeof(prop), "port%d-mode", i + 1); + ret = of_property_read_string(node, prop, &mode); + if (ret < 0) + continue; + + ret = omap_usbhs_get_dt_port_mode(mode); + if (ret < 0) { + dev_warn(dev, "Invalid port%d-mode \"%s\" in device tree\n", + i, mode); + return -ENODEV; + } - if (gpio_is_valid(pdata->reset_gpio_port[1])) - gpio_free(pdata->reset_gpio_port[1]); + dev_dbg(dev, "port%d-mode: %s -> %d\n", i, mode, ret); + pdata->port_mode[i] = ret; } + + /* get flags */ + pdata->single_ulpi_bypass = of_property_read_bool(node, + "single-ulpi-bypass"); + + return 0; } +static struct of_device_id usbhs_child_match_table[] = { + { .compatible = "ti,omap-ehci", }, + { .compatible = "ti,omap-ohci", }, + { } +}; /** * usbhs_omap_probe - initialize TI-based HCDs @@ -522,26 +578,46 @@ static int usbhs_omap_probe(struct platform_device *pdev) int i; bool need_logic_fck; + if (dev->of_node) { + /* For DT boot we populate platform data from OF node */ + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + ret = usbhs_omap_get_dt_pdata(dev, pdata); + if (ret) + return ret; + + dev->platform_data = pdata; + } + if (!pdata) { dev_err(dev, "Missing platform data\n"); return -ENODEV; } + if (pdata->nports > OMAP3_HS_USB_PORTS) { + dev_info(dev, "Too many num_ports <%d> in platform_data. Max %d\n", + pdata->nports, OMAP3_HS_USB_PORTS); + return -ENODEV; + } + omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL); if (!omap) { dev_err(dev, "Memory allocation failed\n"); return -ENOMEM; } - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "uhh"); - omap->uhh_base = devm_request_and_ioremap(dev, res); - if (!omap->uhh_base) { - dev_err(dev, "Resource request/ioremap failed\n"); - return -EADDRNOTAVAIL; - } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + omap->uhh_base = devm_ioremap_resource(dev, res); + if (IS_ERR(omap->uhh_base)) + return PTR_ERR(omap->uhh_base); omap->pdata = pdata; + /* Initialize the TLL subsystem */ + omap_tll_init(pdata); + pm_runtime_enable(dev); platform_set_drvdata(pdev, omap); @@ -575,6 +651,7 @@ static int usbhs_omap_probe(struct platform_device *pdev) omap->usbhs_rev, omap->nports); break; } + pdata->nports = omap->nports; } i = sizeof(struct clk *) * omap->nports; @@ -700,17 +777,28 @@ static int usbhs_omap_probe(struct platform_device *pdev) } omap_usbhs_init(dev); - ret = omap_usbhs_alloc_children(pdev); - if (ret) { - dev_err(dev, "omap_usbhs_alloc_children failed\n"); - goto err_alloc; + + if (dev->of_node) { + ret = of_platform_populate(dev->of_node, + usbhs_child_match_table, NULL, dev); + + if (ret) { + dev_err(dev, "Failed to create DT children: %d\n", ret); + goto err_alloc; + } + + } else { + ret = omap_usbhs_alloc_children(pdev); + if (ret) { + dev_err(dev, "omap_usbhs_alloc_children failed: %d\n", + ret); + goto err_alloc; + } } return 0; err_alloc: - omap_usbhs_deinit(&pdev->dev); - for (i = 0; i < omap->nports; i++) { if (!IS_ERR(omap->utmi_clk[i])) clk_put(omap->utmi_clk[i]); @@ -744,6 +832,13 @@ err_mem: return ret; } +static int usbhs_omap_remove_child(struct device *dev, void *data) +{ + dev_info(dev, "unregistering\n"); + platform_device_unregister(to_platform_device(dev)); + return 0; +} + /** * usbhs_omap_remove - shutdown processing for UHH & TLL HCDs * @pdev: USB Host Controller being removed @@ -755,8 +850,6 @@ static int usbhs_omap_remove(struct platform_device *pdev) struct usbhs_hcd_omap *omap = platform_get_drvdata(pdev); int i; - omap_usbhs_deinit(&pdev->dev); - for (i = 0; i < omap->nports; i++) { if (!IS_ERR(omap->utmi_clk[i])) clk_put(omap->utmi_clk[i]); @@ -777,6 +870,8 @@ static int usbhs_omap_remove(struct platform_device *pdev) pm_runtime_disable(&pdev->dev); + /* remove children */ + device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child); return 0; } @@ -785,16 +880,26 @@ static const struct dev_pm_ops usbhsomap_dev_pm_ops = { .runtime_resume = usbhs_runtime_resume, }; +static const struct of_device_id usbhs_omap_dt_ids[] = { + { .compatible = "ti,usbhs-host" }, + { } +}; + +MODULE_DEVICE_TABLE(of, usbhs_omap_dt_ids); + + static struct platform_driver usbhs_omap_driver = { .driver = { .name = (char *)usbhs_driver_name, .owner = THIS_MODULE, .pm = &usbhsomap_dev_pm_ops, + .of_match_table = of_match_ptr(usbhs_omap_dt_ids), }, .remove = usbhs_omap_remove, }; MODULE_AUTHOR("Keshava Munegowda "); +MODULE_AUTHOR("Roger Quadros "); MODULE_ALIAS("platform:" USBHS_DRIVER_NAME); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("usb host common core driver for omap EHCI and OHCI");