[deliverable/linux.git] / drivers / ssb / driver_gige.c

/*
 * Sonics Silicon Backplane
 * Broadcom Gigabit Ethernet core driver
 *
 * Copyright 2008, Broadcom Corporation
 * Copyright 2008, Michael Buesch <m@bues.ch>
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */

#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_driver_gige.h>
#include <linux/pci.h>
#include <linux/pci_regs.h>
#include <linux/slab.h>


/*
MODULE_DESCRIPTION("SSB Broadcom Gigabit Ethernet driver");
MODULE_AUTHOR("Michael Buesch");
MODULE_LICENSE("GPL");
*/

static const struct ssb_device_id ssb_gige_tbl[] = {
	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET_GBIT, SSB_ANY_REV),
	SSB_DEVTABLE_END
};
/* MODULE_DEVICE_TABLE(ssb, ssb_gige_tbl); */


static inline u8 gige_read8(struct ssb_gige *dev, u16 offset)
{
	return ssb_read8(dev->dev, offset);
}

static inline u16 gige_read16(struct ssb_gige *dev, u16 offset)
{
	return ssb_read16(dev->dev, offset);
}

static inline u32 gige_read32(struct ssb_gige *dev, u16 offset)
{
	return ssb_read32(dev->dev, offset);
}

static inline void gige_write8(struct ssb_gige *dev,
			       u16 offset, u8 value)
{
	ssb_write8(dev->dev, offset, value);
}

static inline void gige_write16(struct ssb_gige *dev,
				u16 offset, u16 value)
{
	ssb_write16(dev->dev, offset, value);
}

static inline void gige_write32(struct ssb_gige *dev,
				u16 offset, u32 value)
{
	ssb_write32(dev->dev, offset, value);
}

static inline
u8 gige_pcicfg_read8(struct ssb_gige *dev, unsigned int offset)
{
	BUG_ON(offset >= 256);
	return gige_read8(dev, SSB_GIGE_PCICFG + offset);
}

static inline
u16 gige_pcicfg_read16(struct ssb_gige *dev, unsigned int offset)
{
	BUG_ON(offset >= 256);
	return gige_read16(dev, SSB_GIGE_PCICFG + offset);
}

static inline
u32 gige_pcicfg_read32(struct ssb_gige *dev, unsigned int offset)
{
	BUG_ON(offset >= 256);
	return gige_read32(dev, SSB_GIGE_PCICFG + offset);
}

static inline
void gige_pcicfg_write8(struct ssb_gige *dev,
			unsigned int offset, u8 value)
{
	BUG_ON(offset >= 256);
	gige_write8(dev, SSB_GIGE_PCICFG + offset, value);
}

static inline
void gige_pcicfg_write16(struct ssb_gige *dev,
			 unsigned int offset, u16 value)
{
	BUG_ON(offset >= 256);
	gige_write16(dev, SSB_GIGE_PCICFG + offset, value);
}

static inline
void gige_pcicfg_write32(struct ssb_gige *dev,
			 unsigned int offset, u32 value)
{
	BUG_ON(offset >= 256);
	gige_write32(dev, SSB_GIGE_PCICFG + offset, value);
}

static int __devinit ssb_gige_pci_read_config(struct pci_bus *bus,
					      unsigned int devfn, int reg,
					      int size, u32 *val)
{
	struct ssb_gige *dev = container_of(bus->ops, struct ssb_gige, pci_ops);
	unsigned long flags;

	if ((PCI_SLOT(devfn) > 0) || (PCI_FUNC(devfn) > 0))
		return PCIBIOS_DEVICE_NOT_FOUND;
	if (reg >= 256)
		return PCIBIOS_DEVICE_NOT_FOUND;

	spin_lock_irqsave(&dev->lock, flags);
	switch (size) {
	case 1:
		*val = gige_pcicfg_read8(dev, reg);
		break;
	case 2:
		*val = gige_pcicfg_read16(dev, reg);
		break;
	case 4:
		*val = gige_pcicfg_read32(dev, reg);
		break;
	default:
		WARN_ON(1);
	}
	spin_unlock_irqrestore(&dev->lock, flags);

	return PCIBIOS_SUCCESSFUL;
}

static int __devinit ssb_gige_pci_write_config(struct pci_bus *bus,
					       unsigned int devfn, int reg,
					       int size, u32 val)
{
	struct ssb_gige *dev = container_of(bus->ops, struct ssb_gige, pci_ops);
	unsigned long flags;

	if ((PCI_SLOT(devfn) > 0) || (PCI_FUNC(devfn) > 0))
		return PCIBIOS_DEVICE_NOT_FOUND;
	if (reg >= 256)
		return PCIBIOS_DEVICE_NOT_FOUND;

	spin_lock_irqsave(&dev->lock, flags);
	switch (size) {
	case 1:
		gige_pcicfg_write8(dev, reg, val);
		break;
	case 2:
		gige_pcicfg_write16(dev, reg, val);
		break;
	case 4:
		gige_pcicfg_write32(dev, reg, val);
		break;
	default:
		WARN_ON(1);
	}
	spin_unlock_irqrestore(&dev->lock, flags);

	return PCIBIOS_SUCCESSFUL;
}

static int __devinit ssb_gige_probe(struct ssb_device *sdev,
				    const struct ssb_device_id *id)
{
	struct ssb_gige *dev;
	u32 base, tmslow, tmshigh;

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev)
		return -ENOMEM;
	dev->dev = sdev;

	spin_lock_init(&dev->lock);
	dev->pci_controller.pci_ops = &dev->pci_ops;
	dev->pci_controller.io_resource = &dev->io_resource;
	dev->pci_controller.mem_resource = &dev->mem_resource;
	dev->pci_controller.io_map_base = 0x800;
	dev->pci_ops.read = ssb_gige_pci_read_config;
	dev->pci_ops.write = ssb_gige_pci_write_config;

	dev->io_resource.name = SSB_GIGE_IO_RES_NAME;
	dev->io_resource.start = 0x800;
	dev->io_resource.end = 0x8FF;
	dev->io_resource.flags = IORESOURCE_IO | IORESOURCE_PCI_FIXED;

	if (!ssb_device_is_enabled(sdev))
		ssb_device_enable(sdev, 0);

	/* Setup BAR0. This is a 64k MMIO region. */
	base = ssb_admatch_base(ssb_read32(sdev, SSB_ADMATCH1));
	gige_pcicfg_write32(dev, PCI_BASE_ADDRESS_0, base);
	gige_pcicfg_write32(dev, PCI_BASE_ADDRESS_1, 0);

	dev->mem_resource.name = SSB_GIGE_MEM_RES_NAME;
	dev->mem_resource.start = base;
	dev->mem_resource.end = base + 0x10000 - 1;
	dev->mem_resource.flags = IORESOURCE_MEM | IORESOURCE_PCI_FIXED;

	/* Enable the memory region. */
	gige_pcicfg_write16(dev, PCI_COMMAND,
			    gige_pcicfg_read16(dev, PCI_COMMAND)
			    | PCI_COMMAND_MEMORY);

	/* Write flushing is controlled by the Flush Status Control register.
	 * We want to flush every register write with a timeout and we want
	 * to disable the IRQ mask while flushing to avoid concurrency.
	 * Note that automatic write flushing does _not_ work from
	 * an IRQ handler. The driver must flush manually by reading a register.
	 */
	gige_write32(dev, SSB_GIGE_SHIM_FLUSHSTAT, 0x00000068);

	/* Check if we have an RGMII or GMII PHY-bus.
	 * On RGMII do not bypass the DLLs */
	tmslow = ssb_read32(sdev, SSB_TMSLOW);
	tmshigh = ssb_read32(sdev, SSB_TMSHIGH);
	if (tmshigh & SSB_GIGE_TMSHIGH_RGMII) {
		tmslow &= ~SSB_GIGE_TMSLOW_TXBYPASS;
		tmslow &= ~SSB_GIGE_TMSLOW_RXBYPASS;
		dev->has_rgmii = 1;
	} else {
		tmslow |= SSB_GIGE_TMSLOW_TXBYPASS;
		tmslow |= SSB_GIGE_TMSLOW_RXBYPASS;
		dev->has_rgmii = 0;
	}
	tmslow |= SSB_GIGE_TMSLOW_DLLEN;
	ssb_write32(sdev, SSB_TMSLOW, tmslow);

	ssb_set_drvdata(sdev, dev);
	register_pci_controller(&dev->pci_controller);

	return 0;
}

bool pdev_is_ssb_gige_core(struct pci_dev *pdev)
{
	if (!pdev->resource[0].name)
		return 0;
	return (strcmp(pdev->resource[0].name, SSB_GIGE_MEM_RES_NAME) == 0);
}
EXPORT_SYMBOL(pdev_is_ssb_gige_core);

int ssb_gige_pcibios_plat_dev_init(struct ssb_device *sdev,
				   struct pci_dev *pdev)
{
	struct ssb_gige *dev = ssb_get_drvdata(sdev);
	struct resource *res;

	if (pdev->bus->ops != &dev->pci_ops) {
		/* The PCI device is not on this SSB GigE bridge device. */
		return -ENODEV;
	}

	/* Fixup the PCI resources. */
	res = &(pdev->resource[0]);
	res->flags = IORESOURCE_MEM | IORESOURCE_PCI_FIXED;
	res->name = dev->mem_resource.name;
	res->start = dev->mem_resource.start;
	res->end = dev->mem_resource.end;

	/* Fixup interrupt lines. */
	pdev->irq = ssb_mips_irq(sdev) + 2;
	pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, pdev->irq);

	return 0;
}

int ssb_gige_map_irq(struct ssb_device *sdev,
		     const struct pci_dev *pdev)
{
	struct ssb_gige *dev = ssb_get_drvdata(sdev);

	if (pdev->bus->ops != &dev->pci_ops) {
		/* The PCI device is not on this SSB GigE bridge device. */
		return -ENODEV;
	}

	return ssb_mips_irq(sdev) + 2;
}

static struct ssb_driver ssb_gige_driver = {
	.name		= "BCM-GigE",
	.id_table	= ssb_gige_tbl,
	.probe		= ssb_gige_probe,
};

int ssb_gige_init(void)
{
	return ssb_driver_register(&ssb_gige_driver);
}
Commit	Line	Data
aab547ce MB	1	/*
	2	* Sonics Silicon Backplane
	3	* Broadcom Gigabit Ethernet core driver
	4	*
	5	* Copyright 2008, Broadcom Corporation
eb032b98	6	* Copyright 2008, Michael Buesch <m@bues.ch>
aab547ce MB	7	*
	8	* Licensed under the GNU/GPL. See COPYING for details.
	9	*/
	10
	11	#include <linux/ssb/ssb.h>
	12	#include <linux/ssb/ssb_driver_gige.h>
	13	#include <linux/pci.h>
	14	#include <linux/pci_regs.h>
5a0e3ad6	15	#include <linux/slab.h>
aab547ce MB	16
	17
	18	/*
	19	MODULE_DESCRIPTION("SSB Broadcom Gigabit Ethernet driver");
	20	MODULE_AUTHOR("Michael Buesch");
	21	MODULE_LICENSE("GPL");
	22	*/
	23
	24	static const struct ssb_device_id ssb_gige_tbl[] = {
	25	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET_GBIT, SSB_ANY_REV),
	26	SSB_DEVTABLE_END
	27	};
	28	/* MODULE_DEVICE_TABLE(ssb, ssb_gige_tbl); */
	29
	30
	31	static inline u8 gige_read8(struct ssb_gige *dev, u16 offset)
	32	{
	33	return ssb_read8(dev->dev, offset);
	34	}
	35
	36	static inline u16 gige_read16(struct ssb_gige *dev, u16 offset)
	37	{
	38	return ssb_read16(dev->dev, offset);
	39	}
	40
	41	static inline u32 gige_read32(struct ssb_gige *dev, u16 offset)
	42	{
	43	return ssb_read32(dev->dev, offset);
	44	}
	45
	46	static inline void gige_write8(struct ssb_gige *dev,
	47	u16 offset, u8 value)
	48	{
	49	ssb_write8(dev->dev, offset, value);
	50	}
	51
	52	static inline void gige_write16(struct ssb_gige *dev,
	53	u16 offset, u16 value)
	54	{
	55	ssb_write16(dev->dev, offset, value);
	56	}
	57
	58	static inline void gige_write32(struct ssb_gige *dev,
	59	u16 offset, u32 value)
	60	{
	61	ssb_write32(dev->dev, offset, value);
	62	}
	63
	64	static inline
	65	u8 gige_pcicfg_read8(struct ssb_gige *dev, unsigned int offset)
	66	{
	67	BUG_ON(offset >= 256);
	68	return gige_read8(dev, SSB_GIGE_PCICFG + offset);
	69	}
	70
	71	static inline
	72	u16 gige_pcicfg_read16(struct ssb_gige *dev, unsigned int offset)
	73	{
	74	BUG_ON(offset >= 256);
	75	return gige_read16(dev, SSB_GIGE_PCICFG + offset);
	76	}
	77
	78	static inline
	79	u32 gige_pcicfg_read32(struct ssb_gige *dev, unsigned int offset)
80	{
81	BUG_ON(offset >= 256);
82	return gige_read32(dev, SSB_GIGE_PCICFG + offset);
83	}
84
85	static inline
86	void gige_pcicfg_write8(struct ssb_gige *dev,
87	unsigned int offset, u8 value)
88	{
89	BUG_ON(offset >= 256);
90	gige_write8(dev, SSB_GIGE_PCICFG + offset, value);
91	}
92
93	static inline
94	void gige_pcicfg_write16(struct ssb_gige *dev,
95	unsigned int offset, u16 value)
96	{
97	BUG_ON(offset >= 256);
98	gige_write16(dev, SSB_GIGE_PCICFG + offset, value);
99	}
100
101	static inline
102	void gige_pcicfg_write32(struct ssb_gige *dev,
103	unsigned int offset, u32 value)
104	{
105	BUG_ON(offset >= 256);
106	gige_write32(dev, SSB_GIGE_PCICFG + offset, value);
107	}
108
cd155987 HM	109	static int __devinit ssb_gige_pci_read_config(struct pci_bus *bus,
	110	unsigned int devfn, int reg,
	111	int size, u32 *val)
aab547ce MB	112	{
	113	struct ssb_gige *dev = container_of(bus->ops, struct ssb_gige, pci_ops);
	114	unsigned long flags;
	115
	116	if ((PCI_SLOT(devfn) > 0) \|\| (PCI_FUNC(devfn) > 0))
	117	return PCIBIOS_DEVICE_NOT_FOUND;
	118	if (reg >= 256)
	119	return PCIBIOS_DEVICE_NOT_FOUND;
	120
	121	spin_lock_irqsave(&dev->lock, flags);
	122	switch (size) {
	123	case 1:
	124	*val = gige_pcicfg_read8(dev, reg);
	125	break;
	126	case 2:
	127	*val = gige_pcicfg_read16(dev, reg);
	128	break;
	129	case 4:
	130	*val = gige_pcicfg_read32(dev, reg);
	131	break;
	132	default:
	133	WARN_ON(1);
	134	}
	135	spin_unlock_irqrestore(&dev->lock, flags);
	136
	137	return PCIBIOS_SUCCESSFUL;
	138	}
	139
cd155987 HM	140	static int __devinit ssb_gige_pci_write_config(struct pci_bus *bus,
	141	unsigned int devfn, int reg,
	142	int size, u32 val)
aab547ce MB	143	{
	144	struct ssb_gige *dev = container_of(bus->ops, struct ssb_gige, pci_ops);
	145	unsigned long flags;
	146
	147	if ((PCI_SLOT(devfn) > 0) \|\| (PCI_FUNC(devfn) > 0))
	148	return PCIBIOS_DEVICE_NOT_FOUND;
	149	if (reg >= 256)
	150	return PCIBIOS_DEVICE_NOT_FOUND;
	151
	152	spin_lock_irqsave(&dev->lock, flags);
	153	switch (size) {
	154	case 1:
	155	gige_pcicfg_write8(dev, reg, val);
	156	break;
	157	case 2:
	158	gige_pcicfg_write16(dev, reg, val);
	159	break;
	160	case 4:
	161	gige_pcicfg_write32(dev, reg, val);
	162	break;
	163	default:
	164	WARN_ON(1);
	165	}
	166	spin_unlock_irqrestore(&dev->lock, flags);
	167
	168	return PCIBIOS_SUCCESSFUL;
	169	}
	170
cd155987 HM	171	static int __devinit ssb_gige_probe(struct ssb_device *sdev,
cd155987 HM	172	const struct ssb_device_id *id)
aab547ce MB	173	{
	174	struct ssb_gige *dev;
	175	u32 base, tmslow, tmshigh;
	176
	177	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	178	if (!dev)
	179	return -ENOMEM;
	180	dev->dev = sdev;
	181
	182	spin_lock_init(&dev->lock);
	183	dev->pci_controller.pci_ops = &dev->pci_ops;
	184	dev->pci_controller.io_resource = &dev->io_resource;
	185	dev->pci_controller.mem_resource = &dev->mem_resource;
	186	dev->pci_controller.io_map_base = 0x800;
	187	dev->pci_ops.read = ssb_gige_pci_read_config;
	188	dev->pci_ops.write = ssb_gige_pci_write_config;
	189
	190	dev->io_resource.name = SSB_GIGE_IO_RES_NAME;
	191	dev->io_resource.start = 0x800;
	192	dev->io_resource.end = 0x8FF;
	193	dev->io_resource.flags = IORESOURCE_IO \| IORESOURCE_PCI_FIXED;
	194
	195	if (!ssb_device_is_enabled(sdev))
	196	ssb_device_enable(sdev, 0);
	197
	198	/* Setup BAR0. This is a 64k MMIO region. */
	199	base = ssb_admatch_base(ssb_read32(sdev, SSB_ADMATCH1));
	200	gige_pcicfg_write32(dev, PCI_BASE_ADDRESS_0, base);
	201	gige_pcicfg_write32(dev, PCI_BASE_ADDRESS_1, 0);
	202
	203	dev->mem_resource.name = SSB_GIGE_MEM_RES_NAME;
	204	dev->mem_resource.start = base;
	205	dev->mem_resource.end = base + 0x10000 - 1;
	206	dev->mem_resource.flags = IORESOURCE_MEM \| IORESOURCE_PCI_FIXED;
	207
	208	/* Enable the memory region. */
	209	gige_pcicfg_write16(dev, PCI_COMMAND,
	210	gige_pcicfg_read16(dev, PCI_COMMAND)
	211	\| PCI_COMMAND_MEMORY);
	212
	213	/* Write flushing is controlled by the Flush Status Control register.
	214	* We want to flush every register write with a timeout and we want
	215	* to disable the IRQ mask while flushing to avoid concurrency.
	216	* Note that automatic write flushing does _not_ work from
	217	* an IRQ handler. The driver must flush manually by reading a register.
	218	*/
	219	gige_write32(dev, SSB_GIGE_SHIM_FLUSHSTAT, 0x00000068);
	220
	221	/* Check if we have an RGMII or GMII PHY-bus.
	222	* On RGMII do not bypass the DLLs */
	223	tmslow = ssb_read32(sdev, SSB_TMSLOW);
	224	tmshigh = ssb_read32(sdev, SSB_TMSHIGH);
	225	if (tmshigh & SSB_GIGE_TMSHIGH_RGMII) {
	226	tmslow &= ~SSB_GIGE_TMSLOW_TXBYPASS;
	227	tmslow &= ~SSB_GIGE_TMSLOW_RXBYPASS;
	228	dev->has_rgmii = 1;
	229	} else {
	230	tmslow \|= SSB_GIGE_TMSLOW_TXBYPASS;
	231	tmslow \|= SSB_GIGE_TMSLOW_RXBYPASS;
	232	dev->has_rgmii = 0;
	233	}
	234	tmslow \|= SSB_GIGE_TMSLOW_DLLEN;
	235	ssb_write32(sdev, SSB_TMSLOW, tmslow);
	236
237	ssb_set_drvdata(sdev, dev);
238	register_pci_controller(&dev->pci_controller);
239
240	return 0;
241	}
242
243	bool pdev_is_ssb_gige_core(struct pci_dev *pdev)
244	{
245	if (!pdev->resource[0].name)
246	return 0;
247	return (strcmp(pdev->resource[0].name, SSB_GIGE_MEM_RES_NAME) == 0);
248	}
249	EXPORT_SYMBOL(pdev_is_ssb_gige_core);
250
251	int ssb_gige_pcibios_plat_dev_init(struct ssb_device *sdev,
252	struct pci_dev *pdev)
253	{
254	struct ssb_gige *dev = ssb_get_drvdata(sdev);
255	struct resource *res;
256
257	if (pdev->bus->ops != &dev->pci_ops) {
258	/* The PCI device is not on this SSB GigE bridge device. */
259	return -ENODEV;
260	}
261
262	/* Fixup the PCI resources. */
263	res = &(pdev->resource[0]);
264	res->flags = IORESOURCE_MEM \| IORESOURCE_PCI_FIXED;
265	res->name = dev->mem_resource.name;
266	res->start = dev->mem_resource.start;
267	res->end = dev->mem_resource.end;
268
269	/* Fixup interrupt lines. */
270	pdev->irq = ssb_mips_irq(sdev) + 2;
271	pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, pdev->irq);
272
273	return 0;
274	}
275
276	int ssb_gige_map_irq(struct ssb_device *sdev,
277	const struct pci_dev *pdev)
278	{
279	struct ssb_gige *dev = ssb_get_drvdata(sdev);
280
281	if (pdev->bus->ops != &dev->pci_ops) {
282	/* The PCI device is not on this SSB GigE bridge device. */
283	return -ENODEV;
284	}
285
286	return ssb_mips_irq(sdev) + 2;
287	}
288
289	static struct ssb_driver ssb_gige_driver = {
290	.name = "BCM-GigE",
291	.id_table = ssb_gige_tbl,
292	.probe = ssb_gige_probe,
293	};
294
295	int ssb_gige_init(void)
296	{
297	return ssb_driver_register(&ssb_gige_driver);
298	}