drivers/bcma/host_pci.c - kernel/msm-4.19 - Gitiles

 /*
  * Broadcom specific AMBA
  * PCI Host
  *
  * Licensed under the GNU/GPL. See COPYING for details.
  */

 #include "bcma_private.h"
 #include <linux/slab.h>
 #include <linux/bcma/bcma.h>
 #include <linux/pci.h>
 #include <linux/module.h>

 static void bcma_host_pci_switch_core(struct bcma_device *core)
 {
 	pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN,
 			       core->addr);
 	pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN2,
 			       core->wrap);
 	core->bus->mapped_core = core;
 	bcma_debug(core->bus, "Switched to core: 0x%X\n", core->id.id);
 }

 /* Provides access to the requested core. Returns base offset that has to be
  * used. It makes use of fixed windows when possible. */
 static u16 bcma_host_pci_provide_access_to_core(struct bcma_device *core)
 {
 	switch (core->id.id) {
 	case BCMA_CORE_CHIPCOMMON:
 		return 3 * BCMA_CORE_SIZE;
 	case BCMA_CORE_PCIE:
 		return 2 * BCMA_CORE_SIZE;
 	}

 	if (core->bus->mapped_core != core)
 		bcma_host_pci_switch_core(core);
 	return 0;
 }

 static u8 bcma_host_pci_read8(struct bcma_device *core, u16 offset)
 {
 	offset += bcma_host_pci_provide_access_to_core(core);
 	return ioread8(core->bus->mmio + offset);
 }

 static u16 bcma_host_pci_read16(struct bcma_device *core, u16 offset)
 {
 	offset += bcma_host_pci_provide_access_to_core(core);
 	return ioread16(core->bus->mmio + offset);
 }

 static u32 bcma_host_pci_read32(struct bcma_device *core, u16 offset)
 {
 	offset += bcma_host_pci_provide_access_to_core(core);
 	return ioread32(core->bus->mmio + offset);
 }

 static void bcma_host_pci_write8(struct bcma_device *core, u16 offset,
 				 u8 value)
 {
 	offset += bcma_host_pci_provide_access_to_core(core);
 	iowrite8(value, core->bus->mmio + offset);
 }

 static void bcma_host_pci_write16(struct bcma_device *core, u16 offset,
 				 u16 value)
 {
 	offset += bcma_host_pci_provide_access_to_core(core);
 	iowrite16(value, core->bus->mmio + offset);
 }

 static void bcma_host_pci_write32(struct bcma_device *core, u16 offset,
 				 u32 value)
 {
 	offset += bcma_host_pci_provide_access_to_core(core);
 	iowrite32(value, core->bus->mmio + offset);
 }

 #ifdef CONFIG_BCMA_BLOCKIO
 static void bcma_host_pci_block_read(struct bcma_device *core, void *buffer,
 				     size_t count, u16 offset, u8 reg_width)
 {
 	void __iomem *addr = core->bus->mmio + offset;
 	if (core->bus->mapped_core != core)
 		bcma_host_pci_switch_core(core);
 	switch (reg_width) {
 	case sizeof(u8):
 		ioread8_rep(addr, buffer, count);
 		break;
 	case sizeof(u16):
 		WARN_ON(count & 1);
 		ioread16_rep(addr, buffer, count >> 1);
 		break;
 	case sizeof(u32):
 		WARN_ON(count & 3);
 		ioread32_rep(addr, buffer, count >> 2);
 		break;
 	default:
 		WARN_ON(1);
 	}
 }

 static void bcma_host_pci_block_write(struct bcma_device *core,
 				      const void *buffer, size_t count,
 				      u16 offset, u8 reg_width)
 {
 	void __iomem *addr = core->bus->mmio + offset;
 	if (core->bus->mapped_core != core)
 		bcma_host_pci_switch_core(core);
 	switch (reg_width) {
 	case sizeof(u8):
 		iowrite8_rep(addr, buffer, count);
 		break;
 	case sizeof(u16):
 		WARN_ON(count & 1);
 		iowrite16_rep(addr, buffer, count >> 1);
 		break;
 	case sizeof(u32):
 		WARN_ON(count & 3);
 		iowrite32_rep(addr, buffer, count >> 2);
 		break;
 	default:
 		WARN_ON(1);
 	}
 }
 #endif

 static u32 bcma_host_pci_aread32(struct bcma_device *core, u16 offset)
 {
 	if (core->bus->mapped_core != core)
 		bcma_host_pci_switch_core(core);
 	return ioread32(core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
 }

 static void bcma_host_pci_awrite32(struct bcma_device *core, u16 offset,
 				  u32 value)
 {
 	if (core->bus->mapped_core != core)
 		bcma_host_pci_switch_core(core);
 	iowrite32(value, core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
 }

 static const struct bcma_host_ops bcma_host_pci_ops = {
 	.read8		= bcma_host_pci_read8,
 	.read16		= bcma_host_pci_read16,
 	.read32		= bcma_host_pci_read32,
 	.write8		= bcma_host_pci_write8,
 	.write16	= bcma_host_pci_write16,
 	.write32	= bcma_host_pci_write32,
 #ifdef CONFIG_BCMA_BLOCKIO
 	.block_read	= bcma_host_pci_block_read,
 	.block_write	= bcma_host_pci_block_write,
 #endif
 	.aread32	= bcma_host_pci_aread32,
 	.awrite32	= bcma_host_pci_awrite32,
 };

 static int bcma_host_pci_probe(struct pci_dev *dev,
 			       const struct pci_device_id *id)
 {
 	struct bcma_bus *bus;
 	int err = -ENOMEM;
 	const char *name;
 	u32 val;

 	/* Alloc */
 	bus = kzalloc(sizeof(*bus), GFP_KERNEL);
 	if (!bus)
 		goto out;

 	/* Basic PCI configuration */
 	err = pci_enable_device(dev);
 	if (err)
 		goto err_kfree_bus;

 	name = dev_name(&dev->dev);
 	if (dev->driver && dev->driver->name)
 		name = dev->driver->name;
 	err = pci_request_regions(dev, name);
 	if (err)
 		goto err_pci_disable;
 	pci_set_master(dev);

 	/* Disable the RETRY_TIMEOUT register (0x41) to keep
 	 * PCI Tx retries from interfering with C3 CPU state */
 	pci_read_config_dword(dev, 0x40, &val);
 	if ((val & 0x0000ff00) != 0)
 		pci_write_config_dword(dev, 0x40, val & 0xffff00ff);

 	/* SSB needed additional powering up, do we have any AMBA PCI cards? */
 	if (!pci_is_pcie(dev)) {
 		bcma_err(bus, "PCI card detected, they are not supported.\n");
 		err = -ENXIO;
 		goto err_pci_release_regions;
 	}

 	/* Map MMIO */
 	err = -ENOMEM;
 	bus->mmio = pci_iomap(dev, 0, ~0UL);
 	if (!bus->mmio)
 		goto err_pci_release_regions;

 	/* Host specific */
 	bus->host_pci = dev;
 	bus->hosttype = BCMA_HOSTTYPE_PCI;
 	bus->ops = &bcma_host_pci_ops;

 	bus->boardinfo.vendor = bus->host_pci->subsystem_vendor;
 	bus->boardinfo.type = bus->host_pci->subsystem_device;

 	/* Register */
 	err = bcma_bus_register(bus);
 	if (err)
 		goto err_pci_unmap_mmio;

 	pci_set_drvdata(dev, bus);

 out:
 	return err;

 err_pci_unmap_mmio:
 	pci_iounmap(dev, bus->mmio);
 err_pci_release_regions:
 	pci_release_regions(dev);
 err_pci_disable:
 	pci_disable_device(dev);
 err_kfree_bus:
 	kfree(bus);
 	return err;
 }

 static void bcma_host_pci_remove(struct pci_dev *dev)
 {
 	struct bcma_bus *bus = pci_get_drvdata(dev);

 	bcma_bus_unregister(bus);
 	pci_iounmap(dev, bus->mmio);
 	pci_release_regions(dev);
 	pci_disable_device(dev);
 	kfree(bus);
 }

 #ifdef CONFIG_PM_SLEEP
 static int bcma_host_pci_suspend(struct device *dev)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
 	struct bcma_bus *bus = pci_get_drvdata(pdev);

 	bus->mapped_core = NULL;

 	return bcma_bus_suspend(bus);
 }

 static int bcma_host_pci_resume(struct device *dev)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
 	struct bcma_bus *bus = pci_get_drvdata(pdev);

 	return bcma_bus_resume(bus);
 }

 static SIMPLE_DEV_PM_OPS(bcma_pm_ops, bcma_host_pci_suspend,
 			 bcma_host_pci_resume);
 #define BCMA_PM_OPS	(&bcma_pm_ops)

 #else /* CONFIG_PM_SLEEP */

 #define BCMA_PM_OPS     NULL

 #endif /* CONFIG_PM_SLEEP */

 static const struct pci_device_id bcma_pci_bridge_tbl[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x0576) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4313) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43224) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4353) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4357) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4358) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4359) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4365) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x43a9) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x43aa) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4727) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43227) },	/* 0xA8DB */
 	{ 0, },
 };
 MODULE_DEVICE_TABLE(pci, bcma_pci_bridge_tbl);

 static struct pci_driver bcma_pci_bridge_driver = {
 	.name = "bcma-pci-bridge",
 	.id_table = bcma_pci_bridge_tbl,
 	.probe = bcma_host_pci_probe,
 	.remove = bcma_host_pci_remove,
 	.driver.pm = BCMA_PM_OPS,
 };

 int __init bcma_host_pci_init(void)
 {
 	return pci_register_driver(&bcma_pci_bridge_driver);
 }

 void __exit bcma_host_pci_exit(void)
 {
 	pci_unregister_driver(&bcma_pci_bridge_driver);
 }
	/*
	* Broadcom specific AMBA
	* PCI Host
	*
	* Licensed under the GNU/GPL. See COPYING for details.
	*/

	#include "bcma_private.h"
	#include <linux/slab.h>
	#include <linux/bcma/bcma.h>
	#include <linux/pci.h>
	#include <linux/module.h>

	static void bcma_host_pci_switch_core(struct bcma_device *core)
	{
	pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN,
	core->addr);
	pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN2,
	core->wrap);
	core->bus->mapped_core = core;
	bcma_debug(core->bus, "Switched to core: 0x%X\n", core->id.id);
	}

	/* Provides access to the requested core. Returns base offset that has to be
	* used. It makes use of fixed windows when possible. */
	static u16 bcma_host_pci_provide_access_to_core(struct bcma_device *core)
	{
	switch (core->id.id) {
	case BCMA_CORE_CHIPCOMMON:
	return 3 * BCMA_CORE_SIZE;
	case BCMA_CORE_PCIE:
	return 2 * BCMA_CORE_SIZE;
	}

	if (core->bus->mapped_core != core)
	bcma_host_pci_switch_core(core);
	return 0;
	}

	static u8 bcma_host_pci_read8(struct bcma_device *core, u16 offset)
	{
	offset += bcma_host_pci_provide_access_to_core(core);
	return ioread8(core->bus->mmio + offset);
	}

	static u16 bcma_host_pci_read16(struct bcma_device *core, u16 offset)
	{
	offset += bcma_host_pci_provide_access_to_core(core);
	return ioread16(core->bus->mmio + offset);
	}

	static u32 bcma_host_pci_read32(struct bcma_device *core, u16 offset)
	{
	offset += bcma_host_pci_provide_access_to_core(core);
	return ioread32(core->bus->mmio + offset);
	}

	static void bcma_host_pci_write8(struct bcma_device *core, u16 offset,
	u8 value)
	{
	offset += bcma_host_pci_provide_access_to_core(core);
	iowrite8(value, core->bus->mmio + offset);
	}

	static void bcma_host_pci_write16(struct bcma_device *core, u16 offset,
	u16 value)
	{
	offset += bcma_host_pci_provide_access_to_core(core);
	iowrite16(value, core->bus->mmio + offset);
	}

	static void bcma_host_pci_write32(struct bcma_device *core, u16 offset,
	u32 value)
	{
	offset += bcma_host_pci_provide_access_to_core(core);
	iowrite32(value, core->bus->mmio + offset);
	}

	#ifdef CONFIG_BCMA_BLOCKIO
	static void bcma_host_pci_block_read(struct bcma_device core, void buffer,
	size_t count, u16 offset, u8 reg_width)
	{
	void __iomem *addr = core->bus->mmio + offset;
	if (core->bus->mapped_core != core)
	bcma_host_pci_switch_core(core);
	switch (reg_width) {
	case sizeof(u8):
	ioread8_rep(addr, buffer, count);
	break;
	case sizeof(u16):
	WARN_ON(count & 1);
	ioread16_rep(addr, buffer, count >> 1);
	break;
	case sizeof(u32):
	WARN_ON(count & 3);
	ioread32_rep(addr, buffer, count >> 2);
	break;
	default:
	WARN_ON(1);
	}
	}

	static void bcma_host_pci_block_write(struct bcma_device *core,
	const void *buffer, size_t count,
	u16 offset, u8 reg_width)
	{
	void __iomem *addr = core->bus->mmio + offset;
	if (core->bus->mapped_core != core)
	bcma_host_pci_switch_core(core);
	switch (reg_width) {
	case sizeof(u8):
	iowrite8_rep(addr, buffer, count);
	break;
	case sizeof(u16):
	WARN_ON(count & 1);
	iowrite16_rep(addr, buffer, count >> 1);
	break;
	case sizeof(u32):
	WARN_ON(count & 3);
	iowrite32_rep(addr, buffer, count >> 2);
	break;
	default:
	WARN_ON(1);
	}
	}
	#endif

	static u32 bcma_host_pci_aread32(struct bcma_device *core, u16 offset)
	{
	if (core->bus->mapped_core != core)
	bcma_host_pci_switch_core(core);
	return ioread32(core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
	}

	static void bcma_host_pci_awrite32(struct bcma_device *core, u16 offset,
	u32 value)
	{
	if (core->bus->mapped_core != core)
	bcma_host_pci_switch_core(core);
	iowrite32(value, core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
	}

	static const struct bcma_host_ops bcma_host_pci_ops = {
	.read8 = bcma_host_pci_read8,
	.read16 = bcma_host_pci_read16,
	.read32 = bcma_host_pci_read32,
	.write8 = bcma_host_pci_write8,
	.write16 = bcma_host_pci_write16,
	.write32 = bcma_host_pci_write32,
	#ifdef CONFIG_BCMA_BLOCKIO
	.block_read = bcma_host_pci_block_read,
	.block_write = bcma_host_pci_block_write,
	#endif
	.aread32 = bcma_host_pci_aread32,
	.awrite32 = bcma_host_pci_awrite32,
	};

	static int bcma_host_pci_probe(struct pci_dev *dev,
	const struct pci_device_id *id)
	{
	struct bcma_bus *bus;
	int err = -ENOMEM;
	const char *name;
	u32 val;

	/* Alloc */
	bus = kzalloc(sizeof(*bus), GFP_KERNEL);
	if (!bus)
	goto out;

	/* Basic PCI configuration */
	err = pci_enable_device(dev);
	if (err)
	goto err_kfree_bus;

	name = dev_name(&dev->dev);
	if (dev->driver && dev->driver->name)
	name = dev->driver->name;
	err = pci_request_regions(dev, name);
	if (err)
	goto err_pci_disable;
	pci_set_master(dev);

	/* Disable the RETRY_TIMEOUT register (0x41) to keep
	* PCI Tx retries from interfering with C3 CPU state */
	pci_read_config_dword(dev, 0x40, &val);
	if ((val & 0x0000ff00) != 0)
	pci_write_config_dword(dev, 0x40, val & 0xffff00ff);

	/* SSB needed additional powering up, do we have any AMBA PCI cards? */
	if (!pci_is_pcie(dev)) {
	bcma_err(bus, "PCI card detected, they are not supported.\n");
	err = -ENXIO;
	goto err_pci_release_regions;
	}

	/* Map MMIO */
	err = -ENOMEM;
	bus->mmio = pci_iomap(dev, 0, ~0UL);
	if (!bus->mmio)
	goto err_pci_release_regions;

	/* Host specific */
	bus->host_pci = dev;
	bus->hosttype = BCMA_HOSTTYPE_PCI;
	bus->ops = &bcma_host_pci_ops;

	bus->boardinfo.vendor = bus->host_pci->subsystem_vendor;
	bus->boardinfo.type = bus->host_pci->subsystem_device;

	/* Register */
	err = bcma_bus_register(bus);
	if (err)
	goto err_pci_unmap_mmio;

	pci_set_drvdata(dev, bus);

	out:
	return err;

	err_pci_unmap_mmio:
	pci_iounmap(dev, bus->mmio);
	err_pci_release_regions:
	pci_release_regions(dev);
	err_pci_disable:
	pci_disable_device(dev);
	err_kfree_bus:
	kfree(bus);
	return err;
	}

	static void bcma_host_pci_remove(struct pci_dev *dev)
	{
	struct bcma_bus *bus = pci_get_drvdata(dev);

	bcma_bus_unregister(bus);
	pci_iounmap(dev, bus->mmio);
	pci_release_regions(dev);
	pci_disable_device(dev);
	kfree(bus);
	}

	#ifdef CONFIG_PM_SLEEP
	static int bcma_host_pci_suspend(struct device *dev)
	{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct bcma_bus *bus = pci_get_drvdata(pdev);

	bus->mapped_core = NULL;

	return bcma_bus_suspend(bus);
	}

	static int bcma_host_pci_resume(struct device *dev)
	{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct bcma_bus *bus = pci_get_drvdata(pdev);

	return bcma_bus_resume(bus);
	}

	static SIMPLE_DEV_PM_OPS(bcma_pm_ops, bcma_host_pci_suspend,
	bcma_host_pci_resume);
	#define BCMA_PM_OPS (&bcma_pm_ops)

	#else /* CONFIG_PM_SLEEP */

	#define BCMA_PM_OPS NULL

	#endif /* CONFIG_PM_SLEEP */

	static const struct pci_device_id bcma_pci_bridge_tbl[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x0576) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4313) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43224) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4353) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4357) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4358) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4359) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4365) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x43a9) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x43aa) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4727) },
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43227) }, /* 0xA8DB */
	{ 0, },
	};
	MODULE_DEVICE_TABLE(pci, bcma_pci_bridge_tbl);

	static struct pci_driver bcma_pci_bridge_driver = {
	.name = "bcma-pci-bridge",
	.id_table = bcma_pci_bridge_tbl,
	.probe = bcma_host_pci_probe,
	.remove = bcma_host_pci_remove,
	.driver.pm = BCMA_PM_OPS,
	};

	int __init bcma_host_pci_init(void)
	{
	return pci_register_driver(&bcma_pci_bridge_driver);
	}

	void __exit bcma_host_pci_exit(void)
	{
	pci_unregister_driver(&bcma_pci_bridge_driver);
	}