[POWERPC] PS3: Device registration routines.

Add routines to probe devices present on the system
and to register those devices with the LDM.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/platforms/ps3/Makefile b/arch/powerpc/platforms/ps3/Makefile
index a0048fcf0866160c48a5e42ea5cff8558324ccc5..ac1bdf844ecabaf26abcc3b8b2e42e5d31743619 100644 (file)
--- a/arch/powerpc/platforms/ps3/Makefile
+++ b/arch/powerpc/platforms/ps3/Makefile
@@ -4,3 +4,4 @@ obj-y += system-bus.o
 
 obj-$(CONFIG_SMP) += smp.o
 obj-$(CONFIG_SPU_BASE) += spu.o
+obj-y += device-init.o

diff --git a/arch/powerpc/platforms/ps3/device-init.c b/arch/powerpc/platforms/ps3/device-init.c
new file mode 100644 (file)
index 0000000..864f313
--- /dev/null
+++ b/arch/powerpc/platforms/ps3/device-init.c
@@ -0,0 +1,499 @@
+/*
+ *  PS3 device registration routines.
+ *
+ *  Copyright (C) 2007 Sony Computer Entertainment Inc.
+ *  Copyright 2007 Sony Corp.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  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.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/delay.h>
+#include <linux/freezer.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/init.h>
+
+#include <asm/firmware.h>
+#include <asm/lv1call.h>
+
+#include "platform.h"
+
+/**
+ * ps3_setup_gelic_device - Setup and register a gelic device instance.
+ *
+ * Allocates memory for a struct ps3_system_bus_device instance, initialises the
+ * structure members, and registers the device instance with the system bus.
+ */
+
+static int __init ps3_setup_gelic_device(
+       const struct ps3_repository_device *repo)
+{
+       int result;
+       struct layout {
+               struct ps3_system_bus_device dev;
+               struct ps3_dma_region d_region;
+       } *p;
+
+       pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+       BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
+       BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_GELIC);
+
+       p = kzalloc(sizeof(struct layout), GFP_KERNEL);
+
+       if (!p) {
+               result = -ENOMEM;
+               goto fail_malloc;
+       }
+
+       p->dev.match_id = PS3_MATCH_ID_GELIC;
+       p->dev.dev_type = PS3_DEVICE_TYPE_SB;
+       p->dev.bus_id = repo->bus_id;
+       p->dev.dev_id = repo->dev_id;
+       p->dev.d_region = &p->d_region;
+
+       result = ps3_repository_find_interrupt(repo,
+               PS3_INTERRUPT_TYPE_EVENT_PORT, &p->dev.interrupt_id);
+
+       if (result) {
+               pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
+                       __func__, __LINE__);
+               goto fail_find_interrupt;
+       }
+
+       BUG_ON(p->dev.interrupt_id != 0);
+
+       result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
+               PS3_DMA_OTHER, NULL, 0);
+
+       if (result) {
+               pr_debug("%s:%d ps3_dma_region_init failed\n",
+                       __func__, __LINE__);
+               goto fail_dma_init;
+       }
+
+       result = ps3_system_bus_device_register(&p->dev);
+
+       if (result) {
+               pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+                       __func__, __LINE__);
+               goto fail_device_register;
+       }
+
+       pr_debug(" <- %s:%d\n", __func__, __LINE__);
+       return result;
+
+fail_device_register:
+fail_dma_init:
+fail_find_interrupt:
+       kfree(p);
+fail_malloc:
+       pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
+       return result;
+}
+
+static int __init_refok ps3_setup_uhc_device(
+       const struct ps3_repository_device *repo, enum ps3_match_id match_id,
+       enum ps3_interrupt_type interrupt_type, enum ps3_reg_type reg_type)
+{
+       int result;
+       struct layout {
+               struct ps3_system_bus_device dev;
+               struct ps3_dma_region d_region;
+               struct ps3_mmio_region m_region;
+       } *p;
+       u64 bus_addr;
+       u64 len;
+
+       pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+       BUG_ON(repo->bus_type != PS3_BUS_TYPE_SB);
+       BUG_ON(repo->dev_type != PS3_DEV_TYPE_SB_USB);
+
+       p = kzalloc(sizeof(struct layout), GFP_KERNEL);
+
+       if (!p) {
+               result = -ENOMEM;
+               goto fail_malloc;
+       }
+
+       p->dev.match_id = match_id;
+       p->dev.dev_type = PS3_DEVICE_TYPE_SB;
+       p->dev.bus_id = repo->bus_id;
+       p->dev.dev_id = repo->dev_id;
+       p->dev.d_region = &p->d_region;
+       p->dev.m_region = &p->m_region;
+
+       result = ps3_repository_find_interrupt(repo,
+               interrupt_type, &p->dev.interrupt_id);
+
+       if (result) {
+               pr_debug("%s:%d ps3_repository_find_interrupt failed\n",
+                       __func__, __LINE__);
+               goto fail_find_interrupt;
+       }
+
+       result = ps3_repository_find_reg(repo, reg_type,
+               &bus_addr, &len);
+
+       if (result) {
+               pr_debug("%s:%d ps3_repository_find_reg failed\n",
+                       __func__, __LINE__);
+               goto fail_find_reg;
+       }
+
+       result = ps3_dma_region_init(&p->dev, p->dev.d_region, PS3_DMA_64K,
+               PS3_DMA_INTERNAL, NULL, 0);
+
+       if (result) {
+               pr_debug("%s:%d ps3_dma_region_init failed\n",
+                       __func__, __LINE__);
+               goto fail_dma_init;
+       }
+
+       result = ps3_mmio_region_init(&p->dev, p->dev.m_region, bus_addr, len,
+               PS3_MMIO_4K);
+
+       if (result) {
+               pr_debug("%s:%d ps3_mmio_region_init failed\n",
+                       __func__, __LINE__);
+               goto fail_mmio_init;
+       }
+
+       result = ps3_system_bus_device_register(&p->dev);
+
+       if (result) {
+               pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+                       __func__, __LINE__);
+               goto fail_device_register;
+       }
+
+       pr_debug(" <- %s:%d\n", __func__, __LINE__);
+       return result;
+
+fail_device_register:
+fail_mmio_init:
+fail_dma_init:
+fail_find_reg:
+fail_find_interrupt:
+       kfree(p);
+fail_malloc:
+       pr_debug(" <- %s:%d: fail.\n", __func__, __LINE__);
+       return result;
+}
+
+static int __init ps3_setup_ehci_device(
+       const struct ps3_repository_device *repo)
+{
+       return ps3_setup_uhc_device(repo, PS3_MATCH_ID_EHCI,
+               PS3_INTERRUPT_TYPE_SB_EHCI, PS3_REG_TYPE_SB_EHCI);
+}
+
+static int __init ps3_setup_ohci_device(
+       const struct ps3_repository_device *repo)
+{
+       return ps3_setup_uhc_device(repo, PS3_MATCH_ID_OHCI,
+               PS3_INTERRUPT_TYPE_SB_OHCI, PS3_REG_TYPE_SB_OHCI);
+}
+
+static int __init ps3_setup_vuart_device(enum ps3_match_id match_id,
+       unsigned int port_number)
+{
+       int result;
+       struct layout {
+               struct ps3_system_bus_device dev;
+       } *p;
+
+       pr_debug(" -> %s:%d: match_id %u, port %u\n", __func__, __LINE__,
+               match_id, port_number);
+
+       p = kzalloc(sizeof(struct layout), GFP_KERNEL);
+
+       if (!p)
+               return -ENOMEM;
+
+       p->dev.match_id = match_id;
+       p->dev.dev_type = PS3_DEVICE_TYPE_VUART;
+       p->dev.port_number = port_number;
+
+       result = ps3_system_bus_device_register(&p->dev);
+
+       if (result)
+               pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+                       __func__, __LINE__);
+
+       pr_debug(" <- %s:%d\n", __func__, __LINE__);
+       return result;
+}
+
+static int __init ps3_register_vuart_devices(void)
+{
+       int result;
+       unsigned int port_number;
+
+       pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+       result = ps3_repository_read_vuart_av_port(&port_number);
+       if (result)
+               port_number = 0; /* av default */
+
+       result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number);
+       WARN_ON(result);
+
+       result = ps3_repository_read_vuart_sysmgr_port(&port_number);
+       if (result)
+               port_number = 2; /* sysmgr default */
+
+       result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER,
+               port_number);
+       WARN_ON(result);
+
+       pr_debug(" <- %s:%d\n", __func__, __LINE__);
+       return result;
+}
+
+static int __init ps3_register_sound_devices(void)
+{
+       int result;
+       struct layout {
+               struct ps3_system_bus_device dev;
+               struct ps3_dma_region d_region;
+               struct ps3_mmio_region m_region;
+       } *p;
+
+       pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+       p = kzalloc(sizeof(*p), GFP_KERNEL);
+       if (!p)
+               return -ENOMEM;
+
+       p->dev.match_id = PS3_MATCH_ID_SOUND;
+       p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
+       p->dev.d_region = &p->d_region;
+       p->dev.m_region = &p->m_region;
+
+       result = ps3_system_bus_device_register(&p->dev);
+
+       if (result)
+               pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+                       __func__, __LINE__);
+
+       pr_debug(" <- %s:%d\n", __func__, __LINE__);
+       return result;
+}
+
+static int __init ps3_register_graphics_devices(void)
+{
+       int result;
+       struct layout {
+               struct ps3_system_bus_device dev;
+       } *p;
+
+       pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+       p = kzalloc(sizeof(struct layout), GFP_KERNEL);
+
+       if (!p)
+               return -ENOMEM;
+
+       p->dev.match_id = PS3_MATCH_ID_GRAPHICS;
+       p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
+
+       result = ps3_system_bus_device_register(&p->dev);
+
+       if (result)
+               pr_debug("%s:%d ps3_system_bus_device_register failed\n",
+                       __func__, __LINE__);
+
+       pr_debug(" <- %s:%d\n", __func__, __LINE__);
+       return result;
+}
+
+/**
+ * ps3_register_repository_device - Register a device from the repositiory info.
+ *
+ */
+
+static int ps3_register_repository_device(
+       const struct ps3_repository_device *repo)
+{
+       int result;
+
+       switch (repo->dev_type) {
+       case PS3_DEV_TYPE_SB_GELIC:
+               result = ps3_setup_gelic_device(repo);
+               if (result) {
+                       pr_debug("%s:%d ps3_setup_gelic_device failed\n",
+                               __func__, __LINE__);
+               }
+               break;
+       case PS3_DEV_TYPE_SB_USB:
+
+               /* Each USB device has both an EHCI and an OHCI HC */
+
+               result = ps3_setup_ehci_device(repo);
+
+               if (result) {
+                       pr_debug("%s:%d ps3_setup_ehci_device failed\n",
+                               __func__, __LINE__);
+               }
+
+               result = ps3_setup_ohci_device(repo);
+
+               if (result) {
+                       pr_debug("%s:%d ps3_setup_ohci_device failed\n",
+                               __func__, __LINE__);
+               }
+               break;
+       default:
+               result = 0;
+               pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
+                       repo->dev_type);
+       }
+
+       return result;
+}
+
+/**
+ * ps3_probe_thread - Background repository probing at system startup.
+ *
+ * This implementation only supports background probing on a single bus.
+ */
+
+static int ps3_probe_thread(void *data)
+{
+       struct ps3_repository_device *repo = data;
+       int result;
+       unsigned int ms = 250;
+
+       pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);
+
+       do {
+               try_to_freeze();
+
+               pr_debug("%s:%u: probing...\n", __func__, __LINE__);
+
+               do {
+                       result = ps3_repository_find_device(repo);
+
+                       if (result == -ENODEV)
+                               pr_debug("%s:%u: nothing new\n", __func__,
+                                       __LINE__);
+                       else if (result)
+                               pr_debug("%s:%u: find device error.\n",
+                                       __func__, __LINE__);
+                       else {
+                               pr_debug("%s:%u: found device\n", __func__,
+                                       __LINE__);
+                               ps3_register_repository_device(repo);
+                               ps3_repository_bump_device(repo);
+                               ms = 250;
+                       }
+               } while (!result);
+
+               pr_debug("%s:%u: ms %u\n", __func__, __LINE__, ms);
+
+               if ( ms > 60000)
+                       break;
+
+               msleep_interruptible(ms);
+
+               /* An exponential backoff. */
+               ms <<= 1;
+
+       } while (!kthread_should_stop());
+
+       pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__);
+
+       return 0;
+}
+
+/**
+ * ps3_start_probe_thread - Starts the background probe thread.
+ *
+ */
+
+static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type)
+{
+       int result;
+       struct task_struct *task;
+       static struct ps3_repository_device repo; /* must be static */
+
+       pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+       memset(&repo, 0, sizeof(repo));
+
+       repo.bus_type = bus_type;
+
+       result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index);
+
+       if (result) {
+               printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result);
+               return -ENODEV;
+       }
+
+       result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id);
+
+       if (result) {
+               printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__,
+                       result);
+               return -ENODEV;
+       }
+
+       task = kthread_run(ps3_probe_thread, &repo, "ps3-probe-%u", bus_type);
+
+       if (IS_ERR(task)) {
+               result = PTR_ERR(task);
+               printk(KERN_ERR "%s: kthread_run failed %d\n", __func__,
+                      result);
+               return result;
+       }
+
+       pr_debug(" <- %s:%d\n", __func__, __LINE__);
+       return 0;
+}
+
+/**
+ * ps3_register_devices - Probe the system and register devices found.
+ *
+ * A device_initcall() routine.
+ */
+
+static int __init ps3_register_devices(void)
+{
+       int result;
+
+       if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
+               return -ENODEV;
+
+       pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+       /* ps3_repository_dump_bus_info(); */
+
+       result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE);
+
+       ps3_register_vuart_devices();
+
+       ps3_register_graphics_devices();
+
+       ps3_repository_find_devices(PS3_BUS_TYPE_SB,
+               ps3_register_repository_device);
+
+       ps3_register_sound_devices();
+
+       pr_debug(" <- %s:%d\n", __func__, __LINE__);
+       return 0;
+}
+
+device_initcall(ps3_register_devices);