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Michael Bueschaab547c2008-02-29 11:36:12 +01001/*
2 * Sonics Silicon Backplane
3 * Broadcom Gigabit Ethernet core driver
4 *
5 * Copyright 2008, Broadcom Corporation
Michael Büscheb032b92011-07-04 20:50:05 +02006 * Copyright 2008, Michael Buesch <m@bues.ch>
Michael Bueschaab547c2008-02-29 11:36:12 +01007 *
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
Michael Bueschaab547c2008-02-29 11:36:12 +010016
17
18/*
19MODULE_DESCRIPTION("SSB Broadcom Gigabit Ethernet driver");
20MODULE_AUTHOR("Michael Buesch");
21MODULE_LICENSE("GPL");
22*/
23
24static 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
31static inline u8 gige_read8(struct ssb_gige *dev, u16 offset)
32{
33 return ssb_read8(dev->dev, offset);
34}
35
36static inline u16 gige_read16(struct ssb_gige *dev, u16 offset)
37{
38 return ssb_read16(dev->dev, offset);
39}
40
41static inline u32 gige_read32(struct ssb_gige *dev, u16 offset)
42{
43 return ssb_read32(dev->dev, offset);
44}
45
46static inline void gige_write8(struct ssb_gige *dev,
47 u16 offset, u8 value)
48{
49 ssb_write8(dev->dev, offset, value);
50}
51
52static inline void gige_write16(struct ssb_gige *dev,
53 u16 offset, u16 value)
54{
55 ssb_write16(dev->dev, offset, value);
56}
57
58static inline void gige_write32(struct ssb_gige *dev,
59 u16 offset, u32 value)
60{
61 ssb_write32(dev->dev, offset, value);
62}
63
64static inline
65u8 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
71static inline
72u16 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
78static inline
79u32 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
85static inline
86void 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
93static inline
94void 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
101static inline
102void 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
Hauke Mehrtenscd155982011-06-21 20:57:16 +0200109static int __devinit ssb_gige_pci_read_config(struct pci_bus *bus,
110 unsigned int devfn, int reg,
111 int size, u32 *val)
Michael Bueschaab547c2008-02-29 11:36:12 +0100112{
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
Hauke Mehrtenscd155982011-06-21 20:57:16 +0200140static int __devinit ssb_gige_pci_write_config(struct pci_bus *bus,
141 unsigned int devfn, int reg,
142 int size, u32 val)
Michael Bueschaab547c2008-02-29 11:36:12 +0100143{
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
Hauke Mehrtenscd155982011-06-21 20:57:16 +0200171static int __devinit ssb_gige_probe(struct ssb_device *sdev,
172 const struct ssb_device_id *id)
Michael Bueschaab547c2008-02-29 11:36:12 +0100173{
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
243bool 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}
249EXPORT_SYMBOL(pdev_is_ssb_gige_core);
250
251int 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
276int 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
289static struct ssb_driver ssb_gige_driver = {
290 .name = "BCM-GigE",
291 .id_table = ssb_gige_tbl,
292 .probe = ssb_gige_probe,
293};
294
295int ssb_gige_init(void)
296{
297 return ssb_driver_register(&ssb_gige_driver);
298}