[deliverable/linux.git] / drivers / bcma / host_pci.c

/*
 * 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
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);
	}
}

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);
}

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 __devinit 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, report problems.\n");

	/* 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 __devexit 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);
	pci_set_drvdata(dev, NULL);
}

#ifdef CONFIG_PM
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 */

#define BCMA_PM_OPS     NULL

#endif /* CONFIG_PM */

static DEFINE_PCI_DEVICE_TABLE(bcma_pci_bridge_tbl) = {
	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x0576) },
	{ 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, 0x4727) },
	{ 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 = __devexit_p(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);
}
Commit	Line	Data
8369ae33 RM	1	/*
	2	* Broadcom specific AMBA
	3	* PCI Host
	4	*
	5	* Licensed under the GNU/GPL. See COPYING for details.
	6	*/
	7
	8	#include "bcma_private.h"
ba7328b2	9	#include <linux/slab.h>
8369ae33 RM	10	#include <linux/bcma/bcma.h>
8369ae33 RM	11	#include <linux/pci.h>
200351c7	12	#include <linux/module.h>
8369ae33 RM	13
	14	static void bcma_host_pci_switch_core(struct bcma_device *core)
	15	{
	16	pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN,
	17	core->addr);
	18	pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN2,
	19	core->wrap);
	20	core->bus->mapped_core = core;
3d9d8af3	21	bcma_debug(core->bus, "Switched to core: 0x%X\n", core->id.id);
8369ae33 RM	22	}
8369ae33 RM	23
439678f8 RM	24	/* Provides access to the requested core. Returns base offset that has to be
	25	* used. It makes use of fixed windows when possible. */
	26	static u16 bcma_host_pci_provide_access_to_core(struct bcma_device *core)
8369ae33	27	{
439678f8 RM	28	switch (core->id.id) {
	29	case BCMA_CORE_CHIPCOMMON:
	30	return 3 * BCMA_CORE_SIZE;
	31	case BCMA_CORE_PCIE:
	32	return 2 * BCMA_CORE_SIZE;
	33	}
	34
8369ae33 RM	35	if (core->bus->mapped_core != core)
8369ae33 RM	36	bcma_host_pci_switch_core(core);
439678f8 RM	37	return 0;
	38	}
	39
	40	static u8 bcma_host_pci_read8(struct bcma_device *core, u16 offset)
	41	{
	42	offset += bcma_host_pci_provide_access_to_core(core);
8369ae33 RM	43	return ioread8(core->bus->mmio + offset);
	44	}
	45
	46	static u16 bcma_host_pci_read16(struct bcma_device *core, u16 offset)
	47	{
439678f8	48	offset += bcma_host_pci_provide_access_to_core(core);
8369ae33 RM	49	return ioread16(core->bus->mmio + offset);
	50	}
	51
	52	static u32 bcma_host_pci_read32(struct bcma_device *core, u16 offset)
	53	{
439678f8	54	offset += bcma_host_pci_provide_access_to_core(core);
8369ae33 RM	55	return ioread32(core->bus->mmio + offset);
	56	}
	57
	58	static void bcma_host_pci_write8(struct bcma_device *core, u16 offset,
	59	u8 value)
	60	{
439678f8	61	offset += bcma_host_pci_provide_access_to_core(core);
8369ae33 RM	62	iowrite8(value, core->bus->mmio + offset);
	63	}
	64
	65	static void bcma_host_pci_write16(struct bcma_device *core, u16 offset,
	66	u16 value)
	67	{
439678f8	68	offset += bcma_host_pci_provide_access_to_core(core);
8369ae33 RM	69	iowrite16(value, core->bus->mmio + offset);
	70	}
	71
	72	static void bcma_host_pci_write32(struct bcma_device *core, u16 offset,
	73	u32 value)
	74	{
439678f8	75	offset += bcma_host_pci_provide_access_to_core(core);
8369ae33 RM	76	iowrite32(value, core->bus->mmio + offset);
	77	}
	78
9d75ef0f RM	79	#ifdef CONFIG_BCMA_BLOCKIO
	80	void bcma_host_pci_block_read(struct bcma_device core, void buffer,
	81	size_t count, u16 offset, u8 reg_width)
	82	{
	83	void __iomem *addr = core->bus->mmio + offset;
	84	if (core->bus->mapped_core != core)
	85	bcma_host_pci_switch_core(core);
	86	switch (reg_width) {
	87	case sizeof(u8):
	88	ioread8_rep(addr, buffer, count);
	89	break;
	90	case sizeof(u16):
	91	WARN_ON(count & 1);
	92	ioread16_rep(addr, buffer, count >> 1);
	93	break;
	94	case sizeof(u32):
	95	WARN_ON(count & 3);
	96	ioread32_rep(addr, buffer, count >> 2);
	97	break;
	98	default:
	99	WARN_ON(1);
	100	}
	101	}
	102
	103	void bcma_host_pci_block_write(struct bcma_device core, const void buffer,
	104	size_t count, u16 offset, u8 reg_width)
	105	{
	106	void __iomem *addr = core->bus->mmio + offset;
	107	if (core->bus->mapped_core != core)
	108	bcma_host_pci_switch_core(core);
	109	switch (reg_width) {
	110	case sizeof(u8):
	111	iowrite8_rep(addr, buffer, count);
	112	break;
	113	case sizeof(u16):
	114	WARN_ON(count & 1);
	115	iowrite16_rep(addr, buffer, count >> 1);
	116	break;
	117	case sizeof(u32):
	118	WARN_ON(count & 3);
	119	iowrite32_rep(addr, buffer, count >> 2);
	120	break;
	121	default:
	122	WARN_ON(1);
	123	}
	124	}
	125	#endif
	126
8369ae33 RM	127	static u32 bcma_host_pci_aread32(struct bcma_device *core, u16 offset)
	128	{
	129	if (core->bus->mapped_core != core)
	130	bcma_host_pci_switch_core(core);
	131	return ioread32(core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
	132	}
	133
	134	static void bcma_host_pci_awrite32(struct bcma_device *core, u16 offset,
	135	u32 value)
	136	{
	137	if (core->bus->mapped_core != core)
	138	bcma_host_pci_switch_core(core);
	139	iowrite32(value, core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
	140	}
	141
	142	const struct bcma_host_ops bcma_host_pci_ops = {
	143	.read8 = bcma_host_pci_read8,
	144	.read16 = bcma_host_pci_read16,
	145	.read32 = bcma_host_pci_read32,
	146	.write8 = bcma_host_pci_write8,
	147	.write16 = bcma_host_pci_write16,
	148	.write32 = bcma_host_pci_write32,
9d75ef0f RM	149	#ifdef CONFIG_BCMA_BLOCKIO
	150	.block_read = bcma_host_pci_block_read,
	151	.block_write = bcma_host_pci_block_write,
	152	#endif
8369ae33 RM	153	.aread32 = bcma_host_pci_aread32,
	154	.awrite32 = bcma_host_pci_awrite32,
	155	};
	156
d1a7a8e1 HM	157	static int __devinit bcma_host_pci_probe(struct pci_dev *dev,
d1a7a8e1 HM	158	const struct pci_device_id *id)
8369ae33 RM	159	{
	160	struct bcma_bus *bus;
	161	int err = -ENOMEM;
	162	const char *name;
	163	u32 val;
	164
	165	/* Alloc */
	166	bus = kzalloc(sizeof(*bus), GFP_KERNEL);
	167	if (!bus)
	168	goto out;
	169
	170	/* Basic PCI configuration */
	171	err = pci_enable_device(dev);
	172	if (err)
	173	goto err_kfree_bus;
	174
	175	name = dev_name(&dev->dev);
	176	if (dev->driver && dev->driver->name)
	177	name = dev->driver->name;
	178	err = pci_request_regions(dev, name);
	179	if (err)
	180	goto err_pci_disable;
	181	pci_set_master(dev);
	182
	183	/* Disable the RETRY_TIMEOUT register (0x41) to keep
	184	* PCI Tx retries from interfering with C3 CPU state */
	185	pci_read_config_dword(dev, 0x40, &val);
	186	if ((val & 0x0000ff00) != 0)
	187	pci_write_config_dword(dev, 0x40, val & 0xffff00ff);
	188
	189	/* SSB needed additional powering up, do we have any AMBA PCI cards? */
	190	if (!pci_is_pcie(dev))
3d9d8af3	191	bcma_err(bus, "PCI card detected, report problems.\n");
8369ae33 RM	192
	193	/* Map MMIO */
	194	err = -ENOMEM;
	195	bus->mmio = pci_iomap(dev, 0, ~0UL);
	196	if (!bus->mmio)
	197	goto err_pci_release_regions;
	198
	199	/* Host specific */
	200	bus->host_pci = dev;
	201	bus->hosttype = BCMA_HOSTTYPE_PCI;
	202	bus->ops = &bcma_host_pci_ops;
	203
0a2fcaa7 HM	204	bus->boardinfo.vendor = bus->host_pci->subsystem_vendor;
	205	bus->boardinfo.type = bus->host_pci->subsystem_device;
	206
8369ae33 RM	207	/* Register */
	208	err = bcma_bus_register(bus);
	209	if (err)
	210	goto err_pci_unmap_mmio;
	211
	212	pci_set_drvdata(dev, bus);
	213
	214	out:
	215	return err;
	216
	217	err_pci_unmap_mmio:
	218	pci_iounmap(dev, bus->mmio);
	219	err_pci_release_regions:
	220	pci_release_regions(dev);
	221	err_pci_disable:
	222	pci_disable_device(dev);
	223	err_kfree_bus:
	224	kfree(bus);
	225	return err;
	226	}
	227
16d75fae	228	static void __devexit bcma_host_pci_remove(struct pci_dev *dev)
8369ae33 RM	229	{
	230	struct bcma_bus *bus = pci_get_drvdata(dev);
	231
	232	bcma_bus_unregister(bus);
	233	pci_iounmap(dev, bus->mmio);
	234	pci_release_regions(dev);
	235	pci_disable_device(dev);
	236	kfree(bus);
	237	pci_set_drvdata(dev, NULL);
	238	}
	239
775ab521	240	#ifdef CONFIG_PM
5d2031f2	241	static int bcma_host_pci_suspend(struct device *dev)
775ab521	242	{
5d2031f2 LT	243	struct pci_dev *pdev = to_pci_dev(dev);
5d2031f2 LT	244	struct bcma_bus *bus = pci_get_drvdata(pdev);
775ab521	245
28e7d218	246	bus->mapped_core = NULL;
5d2031f2	247
685a4ef0	248	return bcma_bus_suspend(bus);
775ab521 RM	249	}
775ab521 RM	250
5d2031f2	251	static int bcma_host_pci_resume(struct device *dev)
775ab521	252	{
5d2031f2 LT	253	struct pci_dev *pdev = to_pci_dev(dev);
5d2031f2 LT	254	struct bcma_bus *bus = pci_get_drvdata(pdev);
775ab521	255
5d2031f2 LT	256	return bcma_bus_resume(bus);
5d2031f2 LT	257	}
775ab521	258
5d2031f2 LT	259	static SIMPLE_DEV_PM_OPS(bcma_pm_ops, bcma_host_pci_suspend,
	260	bcma_host_pci_resume);
	261	#define BCMA_PM_OPS (&bcma_pm_ops)
775ab521	262
775ab521	263	#else /* CONFIG_PM */
5d2031f2 LT	264
	265	#define BCMA_PM_OPS NULL
	266
775ab521 RM	267	#endif /* CONFIG_PM */
775ab521 RM	268
8369ae33	269	static DEFINE_PCI_DEVICE_TABLE(bcma_pci_bridge_tbl) = {
9594b56d	270	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x0576) },
02817be0	271	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43224) },
8369ae33 RM	272	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) },
8369ae33 RM	273	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4353) },
91fa4b0a	274	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4357) },
8369ae33 RM	275	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4727) },
	276	{ 0, },
	277	};
	278	MODULE_DEVICE_TABLE(pci, bcma_pci_bridge_tbl);
	279
	280	static struct pci_driver bcma_pci_bridge_driver = {
	281	.name = "bcma-pci-bridge",
	282	.id_table = bcma_pci_bridge_tbl,
	283	.probe = bcma_host_pci_probe,
16d75fae	284	.remove = __devexit_p(bcma_host_pci_remove),
5d2031f2	285	.driver.pm = BCMA_PM_OPS,
8369ae33 RM	286	};
	287
	288	int __init bcma_host_pci_init(void)
	289	{
	290	return pci_register_driver(&bcma_pci_bridge_driver);
	291	}
	292
	293	void __exit bcma_host_pci_exit(void)
	294	{
	295	pci_unregister_driver(&bcma_pci_bridge_driver);
	296	}