2 * Sonics Silicon Backplane
3 * Broadcom Gigabit Ethernet core driver
5 * Copyright 2008, Broadcom Corporation
6 * Copyright 2008, Michael Buesch <m@bues.ch>
8 * Licensed under the GNU/GPL. See COPYING for details.
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>
15 #include <linux/slab.h>
19 MODULE_DESCRIPTION("SSB Broadcom Gigabit Ethernet driver");
20 MODULE_AUTHOR("Michael Buesch");
21 MODULE_LICENSE("GPL");
24 static const struct ssb_device_id ssb_gige_tbl[] = {
25 SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET_GBIT, SSB_ANY_REV),
28 /* MODULE_DEVICE_TABLE(ssb, ssb_gige_tbl); */
31 static inline u8 gige_read8(struct ssb_gige *dev, u16 offset)
33 return ssb_read8(dev->dev, offset);
36 static inline u16 gige_read16(struct ssb_gige *dev, u16 offset)
38 return ssb_read16(dev->dev, offset);
41 static inline u32 gige_read32(struct ssb_gige *dev, u16 offset)
43 return ssb_read32(dev->dev, offset);
46 static inline void gige_write8(struct ssb_gige *dev,
49 ssb_write8(dev->dev, offset, value);
52 static inline void gige_write16(struct ssb_gige *dev,
53 u16 offset, u16 value)
55 ssb_write16(dev->dev, offset, value);
58 static inline void gige_write32(struct ssb_gige *dev,
59 u16 offset, u32 value)
61 ssb_write32(dev->dev, offset, value);
65 u8 gige_pcicfg_read8(struct ssb_gige *dev, unsigned int offset)
67 BUG_ON(offset >= 256);
68 return gige_read8(dev, SSB_GIGE_PCICFG + offset);
72 u16 gige_pcicfg_read16(struct ssb_gige *dev, unsigned int offset)
74 BUG_ON(offset >= 256);
75 return gige_read16(dev, SSB_GIGE_PCICFG + offset);
79 u32 gige_pcicfg_read32(struct ssb_gige *dev, unsigned int offset)
81 BUG_ON(offset >= 256);
82 return gige_read32(dev, SSB_GIGE_PCICFG + offset);
86 void gige_pcicfg_write8(struct ssb_gige *dev,
87 unsigned int offset, u8 value)
89 BUG_ON(offset >= 256);
90 gige_write8(dev, SSB_GIGE_PCICFG + offset, value);
94 void gige_pcicfg_write16(struct ssb_gige *dev,
95 unsigned int offset, u16 value)
97 BUG_ON(offset >= 256);
98 gige_write16(dev, SSB_GIGE_PCICFG + offset, value);
102 void gige_pcicfg_write32(struct ssb_gige *dev,
103 unsigned int offset, u32 value)
105 BUG_ON(offset >= 256);
106 gige_write32(dev, SSB_GIGE_PCICFG + offset, value);
109 static int __devinit ssb_gige_pci_read_config(struct pci_bus *bus,
110 unsigned int devfn, int reg,
113 struct ssb_gige *dev = container_of(bus->ops, struct ssb_gige, pci_ops);
116 if ((PCI_SLOT(devfn) > 0) || (PCI_FUNC(devfn) > 0))
117 return PCIBIOS_DEVICE_NOT_FOUND;
119 return PCIBIOS_DEVICE_NOT_FOUND;
121 spin_lock_irqsave(&dev->lock, flags);
124 *val = gige_pcicfg_read8(dev, reg);
127 *val = gige_pcicfg_read16(dev, reg);
130 *val = gige_pcicfg_read32(dev, reg);
135 spin_unlock_irqrestore(&dev->lock, flags);
137 return PCIBIOS_SUCCESSFUL;
140 static int __devinit ssb_gige_pci_write_config(struct pci_bus *bus,
141 unsigned int devfn, int reg,
144 struct ssb_gige *dev = container_of(bus->ops, struct ssb_gige, pci_ops);
147 if ((PCI_SLOT(devfn) > 0) || (PCI_FUNC(devfn) > 0))
148 return PCIBIOS_DEVICE_NOT_FOUND;
150 return PCIBIOS_DEVICE_NOT_FOUND;
152 spin_lock_irqsave(&dev->lock, flags);
155 gige_pcicfg_write8(dev, reg, val);
158 gige_pcicfg_write16(dev, reg, val);
161 gige_pcicfg_write32(dev, reg, val);
166 spin_unlock_irqrestore(&dev->lock, flags);
168 return PCIBIOS_SUCCESSFUL;
171 static int __devinit ssb_gige_probe(struct ssb_device *sdev,
172 const struct ssb_device_id *id)
174 struct ssb_gige *dev;
175 u32 base, tmslow, tmshigh;
177 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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;
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;
195 if (!ssb_device_is_enabled(sdev))
196 ssb_device_enable(sdev, 0);
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);
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;
208 /* Enable the memory region. */
209 gige_pcicfg_write16(dev, PCI_COMMAND,
210 gige_pcicfg_read16(dev, PCI_COMMAND)
211 | PCI_COMMAND_MEMORY);
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.
219 gige_write32(dev, SSB_GIGE_SHIM_FLUSHSTAT, 0x00000068);
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;
230 tmslow |= SSB_GIGE_TMSLOW_TXBYPASS;
231 tmslow |= SSB_GIGE_TMSLOW_RXBYPASS;
234 tmslow |= SSB_GIGE_TMSLOW_DLLEN;
235 ssb_write32(sdev, SSB_TMSLOW, tmslow);
237 ssb_set_drvdata(sdev, dev);
238 register_pci_controller(&dev->pci_controller);
243 bool pdev_is_ssb_gige_core(struct pci_dev *pdev)
245 if (!pdev->resource[0].name)
247 return (strcmp(pdev->resource[0].name, SSB_GIGE_MEM_RES_NAME) == 0);
249 EXPORT_SYMBOL(pdev_is_ssb_gige_core);
251 int ssb_gige_pcibios_plat_dev_init(struct ssb_device *sdev,
252 struct pci_dev *pdev)
254 struct ssb_gige *dev = ssb_get_drvdata(sdev);
255 struct resource *res;
257 if (pdev->bus->ops != &dev->pci_ops) {
258 /* The PCI device is not on this SSB GigE bridge device. */
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;
269 /* Fixup interrupt lines. */
270 pdev->irq = ssb_mips_irq(sdev) + 2;
271 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, pdev->irq);
276 int ssb_gige_map_irq(struct ssb_device *sdev,
277 const struct pci_dev *pdev)
279 struct ssb_gige *dev = ssb_get_drvdata(sdev);
281 if (pdev->bus->ops != &dev->pci_ops) {
282 /* The PCI device is not on this SSB GigE bridge device. */
286 return ssb_mips_irq(sdev) + 2;
289 static struct ssb_driver ssb_gige_driver = {
291 .id_table = ssb_gige_tbl,
292 .probe = ssb_gige_probe,
295 int ssb_gige_init(void)
297 return ssb_driver_register(&ssb_gige_driver);