2  * Sonics Silicon Backplane
 
   3  * Broadcom Gigabit Ethernet core driver
 
   5  * Copyright 2008, Broadcom Corporation
 
   6  * Copyright 2008, Michael Buesch <mb@bu3sch.de>
 
   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>
 
  18 MODULE_DESCRIPTION("SSB Broadcom Gigabit Ethernet driver");
 
  19 MODULE_AUTHOR("Michael Buesch");
 
  20 MODULE_LICENSE("GPL");
 
  23 static const struct ssb_device_id ssb_gige_tbl[] = {
 
  24         SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET_GBIT, SSB_ANY_REV),
 
  27 /* MODULE_DEVICE_TABLE(ssb, ssb_gige_tbl); */
 
  30 static inline u8 gige_read8(struct ssb_gige *dev, u16 offset)
 
  32         return ssb_read8(dev->dev, offset);
 
  35 static inline u16 gige_read16(struct ssb_gige *dev, u16 offset)
 
  37         return ssb_read16(dev->dev, offset);
 
  40 static inline u32 gige_read32(struct ssb_gige *dev, u16 offset)
 
  42         return ssb_read32(dev->dev, offset);
 
  45 static inline void gige_write8(struct ssb_gige *dev,
 
  48         ssb_write8(dev->dev, offset, value);
 
  51 static inline void gige_write16(struct ssb_gige *dev,
 
  52                                 u16 offset, u16 value)
 
  54         ssb_write16(dev->dev, offset, value);
 
  57 static inline void gige_write32(struct ssb_gige *dev,
 
  58                                 u16 offset, u32 value)
 
  60         ssb_write32(dev->dev, offset, value);
 
  64 u8 gige_pcicfg_read8(struct ssb_gige *dev, unsigned int offset)
 
  66         BUG_ON(offset >= 256);
 
  67         return gige_read8(dev, SSB_GIGE_PCICFG + offset);
 
  71 u16 gige_pcicfg_read16(struct ssb_gige *dev, unsigned int offset)
 
  73         BUG_ON(offset >= 256);
 
  74         return gige_read16(dev, SSB_GIGE_PCICFG + offset);
 
  78 u32 gige_pcicfg_read32(struct ssb_gige *dev, unsigned int offset)
 
  80         BUG_ON(offset >= 256);
 
  81         return gige_read32(dev, SSB_GIGE_PCICFG + offset);
 
  85 void gige_pcicfg_write8(struct ssb_gige *dev,
 
  86                         unsigned int offset, u8 value)
 
  88         BUG_ON(offset >= 256);
 
  89         gige_write8(dev, SSB_GIGE_PCICFG + offset, value);
 
  93 void gige_pcicfg_write16(struct ssb_gige *dev,
 
  94                          unsigned int offset, u16 value)
 
  96         BUG_ON(offset >= 256);
 
  97         gige_write16(dev, SSB_GIGE_PCICFG + offset, value);
 
 101 void gige_pcicfg_write32(struct ssb_gige *dev,
 
 102                          unsigned int offset, u32 value)
 
 104         BUG_ON(offset >= 256);
 
 105         gige_write32(dev, SSB_GIGE_PCICFG + offset, value);
 
 108 static int ssb_gige_pci_read_config(struct pci_bus *bus, unsigned int devfn,
 
 109                                     int reg, int size, u32 *val)
 
 111         struct ssb_gige *dev = container_of(bus->ops, struct ssb_gige, pci_ops);
 
 114         if ((PCI_SLOT(devfn) > 0) || (PCI_FUNC(devfn) > 0))
 
 115                 return PCIBIOS_DEVICE_NOT_FOUND;
 
 117                 return PCIBIOS_DEVICE_NOT_FOUND;
 
 119         spin_lock_irqsave(&dev->lock, flags);
 
 122                 *val = gige_pcicfg_read8(dev, reg);
 
 125                 *val = gige_pcicfg_read16(dev, reg);
 
 128                 *val = gige_pcicfg_read32(dev, reg);
 
 133         spin_unlock_irqrestore(&dev->lock, flags);
 
 135         return PCIBIOS_SUCCESSFUL;
 
 138 static int ssb_gige_pci_write_config(struct pci_bus *bus, unsigned int devfn,
 
 139                                      int reg, int size, u32 val)
 
 141         struct ssb_gige *dev = container_of(bus->ops, struct ssb_gige, pci_ops);
 
 144         if ((PCI_SLOT(devfn) > 0) || (PCI_FUNC(devfn) > 0))
 
 145                 return PCIBIOS_DEVICE_NOT_FOUND;
 
 147                 return PCIBIOS_DEVICE_NOT_FOUND;
 
 149         spin_lock_irqsave(&dev->lock, flags);
 
 152                 gige_pcicfg_write8(dev, reg, val);
 
 155                 gige_pcicfg_write16(dev, reg, val);
 
 158                 gige_pcicfg_write32(dev, reg, val);
 
 163         spin_unlock_irqrestore(&dev->lock, flags);
 
 165         return PCIBIOS_SUCCESSFUL;
 
 168 static int ssb_gige_probe(struct ssb_device *sdev, const struct ssb_device_id *id)
 
 170         struct ssb_gige *dev;
 
 171         u32 base, tmslow, tmshigh;
 
 173         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 
 178         spin_lock_init(&dev->lock);
 
 179         dev->pci_controller.pci_ops = &dev->pci_ops;
 
 180         dev->pci_controller.io_resource = &dev->io_resource;
 
 181         dev->pci_controller.mem_resource = &dev->mem_resource;
 
 182         dev->pci_controller.io_map_base = 0x800;
 
 183         dev->pci_ops.read = ssb_gige_pci_read_config;
 
 184         dev->pci_ops.write = ssb_gige_pci_write_config;
 
 186         dev->io_resource.name = SSB_GIGE_IO_RES_NAME;
 
 187         dev->io_resource.start = 0x800;
 
 188         dev->io_resource.end = 0x8FF;
 
 189         dev->io_resource.flags = IORESOURCE_IO | IORESOURCE_PCI_FIXED;
 
 191         if (!ssb_device_is_enabled(sdev))
 
 192                 ssb_device_enable(sdev, 0);
 
 194         /* Setup BAR0. This is a 64k MMIO region. */
 
 195         base = ssb_admatch_base(ssb_read32(sdev, SSB_ADMATCH1));
 
 196         gige_pcicfg_write32(dev, PCI_BASE_ADDRESS_0, base);
 
 197         gige_pcicfg_write32(dev, PCI_BASE_ADDRESS_1, 0);
 
 199         dev->mem_resource.name = SSB_GIGE_MEM_RES_NAME;
 
 200         dev->mem_resource.start = base;
 
 201         dev->mem_resource.end = base + 0x10000 - 1;
 
 202         dev->mem_resource.flags = IORESOURCE_MEM | IORESOURCE_PCI_FIXED;
 
 204         /* Enable the memory region. */
 
 205         gige_pcicfg_write16(dev, PCI_COMMAND,
 
 206                             gige_pcicfg_read16(dev, PCI_COMMAND)
 
 207                             | PCI_COMMAND_MEMORY);
 
 209         /* Write flushing is controlled by the Flush Status Control register.
 
 210          * We want to flush every register write with a timeout and we want
 
 211          * to disable the IRQ mask while flushing to avoid concurrency.
 
 212          * Note that automatic write flushing does _not_ work from
 
 213          * an IRQ handler. The driver must flush manually by reading a register.
 
 215         gige_write32(dev, SSB_GIGE_SHIM_FLUSHSTAT, 0x00000068);
 
 217         /* Check if we have an RGMII or GMII PHY-bus.
 
 218          * On RGMII do not bypass the DLLs */
 
 219         tmslow = ssb_read32(sdev, SSB_TMSLOW);
 
 220         tmshigh = ssb_read32(sdev, SSB_TMSHIGH);
 
 221         if (tmshigh & SSB_GIGE_TMSHIGH_RGMII) {
 
 222                 tmslow &= ~SSB_GIGE_TMSLOW_TXBYPASS;
 
 223                 tmslow &= ~SSB_GIGE_TMSLOW_RXBYPASS;
 
 226                 tmslow |= SSB_GIGE_TMSLOW_TXBYPASS;
 
 227                 tmslow |= SSB_GIGE_TMSLOW_RXBYPASS;
 
 230         tmslow |= SSB_GIGE_TMSLOW_DLLEN;
 
 231         ssb_write32(sdev, SSB_TMSLOW, tmslow);
 
 233         ssb_set_drvdata(sdev, dev);
 
 234         register_pci_controller(&dev->pci_controller);
 
 239 bool pdev_is_ssb_gige_core(struct pci_dev *pdev)
 
 241         if (!pdev->resource[0].name)
 
 243         return (strcmp(pdev->resource[0].name, SSB_GIGE_MEM_RES_NAME) == 0);
 
 245 EXPORT_SYMBOL(pdev_is_ssb_gige_core);
 
 247 int ssb_gige_pcibios_plat_dev_init(struct ssb_device *sdev,
 
 248                                    struct pci_dev *pdev)
 
 250         struct ssb_gige *dev = ssb_get_drvdata(sdev);
 
 251         struct resource *res;
 
 253         if (pdev->bus->ops != &dev->pci_ops) {
 
 254                 /* The PCI device is not on this SSB GigE bridge device. */
 
 258         /* Fixup the PCI resources. */
 
 259         res = &(pdev->resource[0]);
 
 260         res->flags = IORESOURCE_MEM | IORESOURCE_PCI_FIXED;
 
 261         res->name = dev->mem_resource.name;
 
 262         res->start = dev->mem_resource.start;
 
 263         res->end = dev->mem_resource.end;
 
 265         /* Fixup interrupt lines. */
 
 266         pdev->irq = ssb_mips_irq(sdev) + 2;
 
 267         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, pdev->irq);
 
 272 int ssb_gige_map_irq(struct ssb_device *sdev,
 
 273                      const struct pci_dev *pdev)
 
 275         struct ssb_gige *dev = ssb_get_drvdata(sdev);
 
 277         if (pdev->bus->ops != &dev->pci_ops) {
 
 278                 /* The PCI device is not on this SSB GigE bridge device. */
 
 282         return ssb_mips_irq(sdev) + 2;
 
 285 static struct ssb_driver ssb_gige_driver = {
 
 287         .id_table       = ssb_gige_tbl,
 
 288         .probe          = ssb_gige_probe,
 
 291 int ssb_gige_init(void)
 
 293         return ssb_driver_register(&ssb_gige_driver);