[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/amba/bus.c b/ap/os/linux/linux-3.4.x/drivers/amba/bus.c
new file mode 100644
index 0000000..cc27322
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/amba/bus.c
@@ -0,0 +1,730 @@
+/*
+ * linux/arch/arm/common/amba.c
+ *
+ * Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/amba/bus.h>
+
+#include <asm/irq.h>
+#include <asm/sizes.h>
+
+#define to_amba_driver(d) container_of(d, struct amba_driver, drv)
+
+static const struct amba_id *
+amba_lookup(const struct amba_id *table, struct amba_device *dev)
+{
+ int ret = 0;
+
+ while (table->mask) {
+ ret = (dev->periphid & table->mask) == table->id;
+ if (ret)
+ break;
+ table++;
+ }
+
+ return ret ? table : NULL;
+}
+
+static int amba_match(struct device *dev, struct device_driver *drv)
+{
+ struct amba_device *pcdev = to_amba_device(dev);
+ struct amba_driver *pcdrv = to_amba_driver(drv);
+
+ return amba_lookup(pcdrv->id_table, pcdev) != NULL;
+}
+
+#ifdef CONFIG_HOTPLUG
+static int amba_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct amba_device *pcdev = to_amba_device(dev);
+ int retval = 0;
+
+ retval = add_uevent_var(env, "AMBA_ID=%08x", pcdev->periphid);
+ if (retval)
+ return retval;
+
+ retval = add_uevent_var(env, "MODALIAS=amba:d%08X", pcdev->periphid);
+ return retval;
+}
+#else
+#define amba_uevent NULL
+#endif
+
+#define amba_attr_func(name,fmt,arg...) \
+static ssize_t name##_show(struct device *_dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct amba_device *dev = to_amba_device(_dev); \
+ return sprintf(buf, fmt, arg); \
+}
+
+#define amba_attr(name,fmt,arg...) \
+amba_attr_func(name,fmt,arg) \
+static DEVICE_ATTR(name, S_IRUGO, name##_show, NULL)
+
+amba_attr_func(id, "%08x\n", dev->periphid);
+amba_attr(irq0, "%u\n", dev->irq[0]);
+amba_attr(irq1, "%u\n", dev->irq[1]);
+amba_attr_func(resource, "\t%016llx\t%016llx\t%016lx\n",
+ (unsigned long long)dev->res.start, (unsigned long long)dev->res.end,
+ dev->res.flags);
+
+static struct device_attribute amba_dev_attrs[] = {
+ __ATTR_RO(id),
+ __ATTR_RO(resource),
+ __ATTR_NULL,
+};
+
+#ifdef CONFIG_PM_SLEEP
+
+static int amba_legacy_suspend(struct device *dev, pm_message_t mesg)
+{
+ struct amba_driver *adrv = to_amba_driver(dev->driver);
+ struct amba_device *adev = to_amba_device(dev);
+ int ret = 0;
+
+ if (dev->driver && adrv->suspend)
+ ret = adrv->suspend(adev, mesg);
+
+ return ret;
+}
+
+static int amba_legacy_resume(struct device *dev)
+{
+ struct amba_driver *adrv = to_amba_driver(dev->driver);
+ struct amba_device *adev = to_amba_device(dev);
+ int ret = 0;
+
+ if (dev->driver && adrv->resume)
+ ret = adrv->resume(adev);
+
+ return ret;
+}
+
+#endif /* CONFIG_PM_SLEEP */
+
+#ifdef CONFIG_SUSPEND
+
+static int amba_pm_suspend(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->suspend)
+ ret = drv->pm->suspend(dev);
+ } else {
+ ret = amba_legacy_suspend(dev, PMSG_SUSPEND);
+ }
+
+ return ret;
+}
+
+static int amba_pm_resume(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->resume)
+ ret = drv->pm->resume(dev);
+ } else {
+ ret = amba_legacy_resume(dev);
+ }
+
+ return ret;
+}
+
+#else /* !CONFIG_SUSPEND */
+
+#define amba_pm_suspend NULL
+#define amba_pm_resume NULL
+
+#endif /* !CONFIG_SUSPEND */
+
+#ifdef CONFIG_HIBERNATE_CALLBACKS
+
+static int amba_pm_freeze(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->freeze)
+ ret = drv->pm->freeze(dev);
+ } else {
+ ret = amba_legacy_suspend(dev, PMSG_FREEZE);
+ }
+
+ return ret;
+}
+
+static int amba_pm_thaw(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->thaw)
+ ret = drv->pm->thaw(dev);
+ } else {
+ ret = amba_legacy_resume(dev);
+ }
+
+ return ret;
+}
+
+static int amba_pm_poweroff(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->poweroff)
+ ret = drv->pm->poweroff(dev);
+ } else {
+ ret = amba_legacy_suspend(dev, PMSG_HIBERNATE);
+ }
+
+ return ret;
+}
+
+static int amba_pm_restore(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int ret = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->restore)
+ ret = drv->pm->restore(dev);
+ } else {
+ ret = amba_legacy_resume(dev);
+ }
+
+ return ret;
+}
+
+#else /* !CONFIG_HIBERNATE_CALLBACKS */
+
+#define amba_pm_freeze NULL
+#define amba_pm_thaw NULL
+#define amba_pm_poweroff NULL
+#define amba_pm_restore NULL
+
+#endif /* !CONFIG_HIBERNATE_CALLBACKS */
+
+#ifdef CONFIG_PM_RUNTIME
+/*
+ * Hooks to provide runtime PM of the pclk (bus clock). It is safe to
+ * enable/disable the bus clock at runtime PM suspend/resume as this
+ * does not result in loss of context.
+ */
+static int amba_pm_runtime_suspend(struct device *dev)
+{
+ struct amba_device *pcdev = to_amba_device(dev);
+ int ret = pm_generic_runtime_suspend(dev);
+
+ if (ret == 0 && dev->driver)
+ clk_disable(pcdev->pclk);
+
+ return ret;
+}
+
+static int amba_pm_runtime_resume(struct device *dev)
+{
+ struct amba_device *pcdev = to_amba_device(dev);
+ int ret;
+
+ if (dev->driver) {
+ ret = clk_enable(pcdev->pclk);
+ /* Failure is probably fatal to the system, but... */
+ if (ret)
+ return ret;
+ }
+
+ return pm_generic_runtime_resume(dev);
+}
+#endif
+
+#ifdef CONFIG_PM
+
+static const struct dev_pm_ops amba_pm = {
+ .suspend = amba_pm_suspend,
+ .resume = amba_pm_resume,
+ .freeze = amba_pm_freeze,
+ .thaw = amba_pm_thaw,
+ .poweroff = amba_pm_poweroff,
+ .restore = amba_pm_restore,
+ SET_RUNTIME_PM_OPS(
+ amba_pm_runtime_suspend,
+ amba_pm_runtime_resume,
+ pm_generic_runtime_idle
+ )
+};
+
+#define AMBA_PM (&amba_pm)
+
+#else /* !CONFIG_PM */
+
+#define AMBA_PM NULL
+
+#endif /* !CONFIG_PM */
+
+/*
+ * Primecells are part of the Advanced Microcontroller Bus Architecture,
+ * so we call the bus "amba".
+ */
+struct bus_type amba_bustype = {
+ .name = "amba",
+ .dev_attrs = amba_dev_attrs,
+ .match = amba_match,
+ .uevent = amba_uevent,
+ .pm = AMBA_PM,
+};
+
+static int __init amba_init(void)
+{
+ return bus_register(&amba_bustype);
+}
+
+postcore_initcall(amba_init);
+
+static int amba_get_enable_pclk(struct amba_device *pcdev)
+{
+ struct clk *pclk = clk_get(&pcdev->dev, "apb_pclk");
+ int ret;
+
+ pcdev->pclk = pclk;
+
+ if (IS_ERR(pclk))
+ return PTR_ERR(pclk);
+
+ ret = clk_prepare(pclk);
+ if (ret) {
+ clk_put(pclk);
+ return ret;
+ }
+
+ ret = clk_enable(pclk);
+ if (ret) {
+ clk_unprepare(pclk);
+ clk_put(pclk);
+ }
+
+ return ret;
+}
+
+static void amba_put_disable_pclk(struct amba_device *pcdev)
+{
+ struct clk *pclk = pcdev->pclk;
+
+ clk_disable(pclk);
+ clk_unprepare(pclk);
+ clk_put(pclk);
+}
+
+/*
+ * These are the device model conversion veneers; they convert the
+ * device model structures to our more specific structures.
+ */
+static int amba_probe(struct device *dev)
+{
+ struct amba_device *pcdev = to_amba_device(dev);
+ struct amba_driver *pcdrv = to_amba_driver(dev->driver);
+ const struct amba_id *id = amba_lookup(pcdrv->id_table, pcdev);
+ int ret;
+
+ do {
+ ret = amba_get_enable_pclk(pcdev);
+ if (ret)
+ break;
+
+ pm_runtime_get_noresume(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ ret = pcdrv->probe(pcdev, id);
+ if (ret == 0)
+ break;
+
+ pm_runtime_disable(dev);
+ pm_runtime_set_suspended(dev);
+ pm_runtime_put_noidle(dev);
+
+ amba_put_disable_pclk(pcdev);
+ } while (0);
+
+ return ret;
+}
+
+static int amba_remove(struct device *dev)
+{
+ struct amba_device *pcdev = to_amba_device(dev);
+ struct amba_driver *drv = to_amba_driver(dev->driver);
+ int ret;
+
+ pm_runtime_get_sync(dev);
+ ret = drv->remove(pcdev);
+ pm_runtime_put_noidle(dev);
+
+ /* Undo the runtime PM settings in amba_probe() */
+ pm_runtime_disable(dev);
+ pm_runtime_set_suspended(dev);
+ pm_runtime_put_noidle(dev);
+
+ amba_put_disable_pclk(pcdev);
+
+ return ret;
+}
+
+static void amba_shutdown(struct device *dev)
+{
+ struct amba_driver *drv = to_amba_driver(dev->driver);
+ drv->shutdown(to_amba_device(dev));
+}
+
+/**
+ * amba_driver_register - register an AMBA device driver
+ * @drv: amba device driver structure
+ *
+ * Register an AMBA device driver with the Linux device model
+ * core. If devices pre-exist, the drivers probe function will
+ * be called.
+ */
+int amba_driver_register(struct amba_driver *drv)
+{
+ drv->drv.bus = &amba_bustype;
+
+#define SETFN(fn) if (drv->fn) drv->drv.fn = amba_##fn
+ SETFN(probe);
+ SETFN(remove);
+ SETFN(shutdown);
+
+ return driver_register(&drv->drv);
+}
+
+/**
+ * amba_driver_unregister - remove an AMBA device driver
+ * @drv: AMBA device driver structure to remove
+ *
+ * Unregister an AMBA device driver from the Linux device
+ * model. The device model will call the drivers remove function
+ * for each device the device driver is currently handling.
+ */
+void amba_driver_unregister(struct amba_driver *drv)
+{
+ driver_unregister(&drv->drv);
+}
+
+
+static void amba_device_release(struct device *dev)
+{
+ struct amba_device *d = to_amba_device(dev);
+
+ if (d->res.parent)
+ release_resource(&d->res);
+ kfree(d);
+}
+
+/**
+ * amba_device_add - add a previously allocated AMBA device structure
+ * @dev: AMBA device allocated by amba_device_alloc
+ * @parent: resource parent for this devices resources
+ *
+ * Claim the resource, and read the device cell ID if not already
+ * initialized. Register the AMBA device with the Linux device
+ * manager.
+ */
+int amba_device_add(struct amba_device *dev, struct resource *parent)
+{
+ u32 size;
+ void __iomem *tmp;
+ int i, ret;
+
+ WARN_ON(dev->irq[0] == (unsigned int)-1);
+ WARN_ON(dev->irq[1] == (unsigned int)-1);
+
+ ret = request_resource(parent, &dev->res);
+ if (ret)
+ goto err_out;
+
+ /* Hard-coded primecell ID instead of plug-n-play */
+ if (dev->periphid != 0)
+ goto skip_probe;
+
+ /*
+ * Dynamically calculate the size of the resource
+ * and use this for iomap
+ */
+ size = resource_size(&dev->res);
+ tmp = ioremap(dev->res.start, size);
+ if (!tmp) {
+ ret = -ENOMEM;
+ goto err_release;
+ }
+
+ ret = amba_get_enable_pclk(dev);
+ if (ret == 0) {
+ u32 pid, cid;
+
+ /*
+ * Read pid and cid based on size of resource
+ * they are located at end of region
+ */
+ for (pid = 0, i = 0; i < 4; i++)
+ pid |= (readl(tmp + size - 0x20 + 4 * i) & 255) <<
+ (i * 8);
+ for (cid = 0, i = 0; i < 4; i++)
+ cid |= (readl(tmp + size - 0x10 + 4 * i) & 255) <<
+ (i * 8);
+
+ amba_put_disable_pclk(dev);
+
+ if (cid == AMBA_CID)
+ dev->periphid = pid;
+
+ if (!dev->periphid)
+ ret = -ENODEV;
+ }
+
+ iounmap(tmp);
+
+ if (ret)
+ goto err_release;
+
+ skip_probe:
+ ret = device_add(&dev->dev);
+ if (ret)
+ goto err_release;
+
+ if (dev->irq[0] && dev->irq[0] != NO_IRQ)
+ ret = device_create_file(&dev->dev, &dev_attr_irq0);
+ if (ret == 0 && dev->irq[1] && dev->irq[1] != NO_IRQ)
+ ret = device_create_file(&dev->dev, &dev_attr_irq1);
+ if (ret == 0)
+ return ret;
+
+ device_unregister(&dev->dev);
+
+ err_release:
+ release_resource(&dev->res);
+ err_out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(amba_device_add);
+
+static void amba_device_initialize(struct amba_device *dev, const char *name)
+{
+ device_initialize(&dev->dev);
+ if (name)
+ dev_set_name(&dev->dev, "%s", name);
+ dev->dev.release = amba_device_release;
+ dev->dev.bus = &amba_bustype;
+ dev->dev.dma_mask = &dev->dma_mask;
+ dev->res.name = dev_name(&dev->dev);
+}
+
+/**
+ * amba_device_alloc - allocate an AMBA device
+ * @name: sysfs name of the AMBA device
+ * @base: base of AMBA device
+ * @size: size of AMBA device
+ *
+ * Allocate and initialize an AMBA device structure. Returns %NULL
+ * on failure.
+ */
+struct amba_device *amba_device_alloc(const char *name, resource_size_t base,
+ size_t size)
+{
+ struct amba_device *dev;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (dev) {
+ amba_device_initialize(dev, name);
+ dev->res.start = base;
+ dev->res.end = base + size - 1;
+ dev->res.flags = IORESOURCE_MEM;
+ }
+
+ return dev;
+}
+EXPORT_SYMBOL_GPL(amba_device_alloc);
+
+/**
+ * amba_device_register - register an AMBA device
+ * @dev: AMBA device to register
+ * @parent: parent memory resource
+ *
+ * Setup the AMBA device, reading the cell ID if present.
+ * Claim the resource, and register the AMBA device with
+ * the Linux device manager.
+ */
+int amba_device_register(struct amba_device *dev, struct resource *parent)
+{
+ amba_device_initialize(dev, dev->dev.init_name);
+ dev->dev.init_name = NULL;
+
+ if (!dev->dev.coherent_dma_mask && dev->dma_mask)
+ dev_warn(&dev->dev, "coherent dma mask is unset\n");
+
+ return amba_device_add(dev, parent);
+}
+
+/**
+ * amba_device_put - put an AMBA device
+ * @dev: AMBA device to put
+ */
+void amba_device_put(struct amba_device *dev)
+{
+ put_device(&dev->dev);
+}
+EXPORT_SYMBOL_GPL(amba_device_put);
+
+/**
+ * amba_device_unregister - unregister an AMBA device
+ * @dev: AMBA device to remove
+ *
+ * Remove the specified AMBA device from the Linux device
+ * manager. All files associated with this object will be
+ * destroyed, and device drivers notified that the device has
+ * been removed. The AMBA device's resources including
+ * the amba_device structure will be freed once all
+ * references to it have been dropped.
+ */
+void amba_device_unregister(struct amba_device *dev)
+{
+ device_unregister(&dev->dev);
+}
+
+
+struct find_data {
+ struct amba_device *dev;
+ struct device *parent;
+ const char *busid;
+ unsigned int id;
+ unsigned int mask;
+};
+
+static int amba_find_match(struct device *dev, void *data)
+{
+ struct find_data *d = data;
+ struct amba_device *pcdev = to_amba_device(dev);
+ int r;
+
+ r = (pcdev->periphid & d->mask) == d->id;
+ if (d->parent)
+ r &= d->parent == dev->parent;
+ if (d->busid)
+ r &= strcmp(dev_name(dev), d->busid) == 0;
+
+ if (r) {
+ get_device(dev);
+ d->dev = pcdev;
+ }
+
+ return r;
+}
+
+/**
+ * amba_find_device - locate an AMBA device given a bus id
+ * @busid: bus id for device (or NULL)
+ * @parent: parent device (or NULL)
+ * @id: peripheral ID (or 0)
+ * @mask: peripheral ID mask (or 0)
+ *
+ * Return the AMBA device corresponding to the supplied parameters.
+ * If no device matches, returns NULL.
+ *
+ * NOTE: When a valid device is found, its refcount is
+ * incremented, and must be decremented before the returned
+ * reference.
+ */
+struct amba_device *
+amba_find_device(const char *busid, struct device *parent, unsigned int id,
+ unsigned int mask)
+{
+ struct find_data data;
+
+ data.dev = NULL;
+ data.parent = parent;
+ data.busid = busid;
+ data.id = id;
+ data.mask = mask;
+
+ bus_for_each_dev(&amba_bustype, NULL, &data, amba_find_match);
+
+ return data.dev;
+}
+
+/**
+ * amba_request_regions - request all mem regions associated with device
+ * @dev: amba_device structure for device
+ * @name: name, or NULL to use driver name
+ */
+int amba_request_regions(struct amba_device *dev, const char *name)
+{
+ int ret = 0;
+ u32 size;
+
+ if (!name)
+ name = dev->dev.driver->name;
+
+ size = resource_size(&dev->res);
+
+ if (!request_mem_region(dev->res.start, size, name))
+ ret = -EBUSY;
+
+ return ret;
+}
+
+/**
+ * amba_release_regions - release mem regions associated with device
+ * @dev: amba_device structure for device
+ *
+ * Release regions claimed by a successful call to amba_request_regions.
+ */
+void amba_release_regions(struct amba_device *dev)
+{
+ u32 size;
+
+ size = resource_size(&dev->res);
+ release_mem_region(dev->res.start, size);
+}
+
+EXPORT_SYMBOL(amba_driver_register);
+EXPORT_SYMBOL(amba_driver_unregister);
+EXPORT_SYMBOL(amba_device_register);
+EXPORT_SYMBOL(amba_device_unregister);
+EXPORT_SYMBOL(amba_find_device);
+EXPORT_SYMBOL(amba_request_regions);
+EXPORT_SYMBOL(amba_release_regions);