| /* |
| * (C) 2003-2004 Linux Networx |
| */ |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <device/pci_ops.h> |
| #include <pc80/mc146818rtc.h> |
| #include <device/pci_def.h> |
| #include <device/pcix.h> |
| |
| #define NMI_OFF 0 |
| |
| #define NPUML 0xD9 /* Non prefetchable upper memory limit */ |
| #define NPUMB 0xD8 /* Non prefetchable upper memory base */ |
| |
| static void amd8131_walk_children(struct bus *bus, |
| void (*visit)(device_t dev, void *ptr), void *ptr) |
| { |
| device_t child; |
| for(child = bus->children; child; child = child->sibling) |
| { |
| if (child->path.type != DEVICE_PATH_PCI) { |
| continue; |
| } |
| if (child->hdr_type == PCI_HEADER_TYPE_BRIDGE) { |
| amd8131_walk_children(child->link_list, visit, ptr); |
| } |
| visit(child, ptr); |
| } |
| } |
| |
| struct amd8131_bus_info { |
| unsigned sstatus; |
| unsigned rev; |
| int errata_56; |
| int master_devices; |
| int max_func; |
| }; |
| |
| static void amd8131_count_dev(device_t dev, void *ptr) |
| { |
| struct amd8131_bus_info *info = ptr; |
| /* Don't count pci bridges */ |
| if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) { |
| info->master_devices++; |
| } |
| if (PCI_FUNC(dev->path.pci.devfn) > info->max_func) { |
| info->max_func = PCI_FUNC(dev->path.pci.devfn); |
| } |
| } |
| |
| |
| static void amd8131_pcix_tune_dev(device_t dev, void *ptr) |
| { |
| struct amd8131_bus_info *info = ptr; |
| unsigned cap; |
| unsigned status, cmd, orig_cmd; |
| unsigned max_read, max_tran; |
| int sib_funcs, sibs; |
| device_t sib; |
| |
| if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL) { |
| return; |
| } |
| cap = pci_find_capability(dev, PCI_CAP_ID_PCIX); |
| if (!cap) { |
| return; |
| } |
| /* How many siblings does this device have? */ |
| sibs = info->master_devices - 1; |
| /* Count how many sibling functions this device has */ |
| sib_funcs = 0; |
| for(sib = dev->bus->children; sib; sib = sib->sibling) { |
| if (sib == dev) { |
| continue; |
| } |
| if (PCI_SLOT(sib->path.pci.devfn) != PCI_SLOT(dev->path.pci.devfn)) { |
| continue; |
| } |
| sib_funcs++; |
| } |
| |
| |
| printk(BIOS_DEBUG, "%s AMD8131 PCI-X tuning\n", dev_path(dev)); |
| status = pci_read_config32(dev, cap + PCI_X_STATUS); |
| orig_cmd = cmd = pci_read_config16(dev,cap + PCI_X_CMD); |
| |
| max_read = (status & PCI_X_STATUS_MAX_READ) >> 21; |
| max_tran = (status & PCI_X_STATUS_MAX_SPLIT) >> 23; |
| |
| /* Errata #49 don't allow 4K transactions */ |
| if (max_read >= 2) { |
| max_read = 2; |
| } |
| |
| /* Errata #37 Limit the number of split transactions to avoid starvation */ |
| if (sibs >= 2) { |
| /* At most 2 outstanding split transactions when we have |
| * 3 or more bus master devices on the bus. |
| */ |
| if (max_tran > 1) { |
| max_tran = 1; |
| } |
| } |
| else if (sibs == 1) { |
| /* At most 4 outstanding split transactions when we have |
| * 2 bus master devices on the bus. |
| */ |
| if (max_tran > 3) { |
| max_tran = 3; |
| } |
| } |
| else { |
| /* At most 8 outstanding split transactions when we have |
| * only one bus master device on the bus. |
| */ |
| if (max_tran > 4) { |
| max_tran = 4; |
| } |
| } |
| /* Errata #56 additional limits when the bus runs at 133Mhz */ |
| if (info->errata_56 && |
| (PCI_X_SSTATUS_MFREQ(info->sstatus) == PCI_X_SSTATUS_MODE1_133MHZ)) |
| { |
| unsigned limit_read; |
| /* Look at the number of siblings and compute the |
| * largest legal read size. |
| */ |
| if (sib_funcs == 0) { |
| /* 2k reads */ |
| limit_read = 2; |
| } |
| else if (sib_funcs <= 1) { |
| /* 1k reads */ |
| limit_read = 1; |
| } |
| else { |
| /* 512 byte reads */ |
| limit_read = 0; |
| } |
| if (max_read > limit_read) { |
| max_read = limit_read; |
| } |
| /* Look at the read size and the number of siblings |
| * and compute how many outstanding transactions I can have. |
| */ |
| if (max_read == 2) { |
| /* 2K reads */ |
| if (max_tran > 0) { |
| /* Only 1 outstanding transaction allowed */ |
| max_tran = 0; |
| } |
| } |
| else if (max_read == 1) { |
| /* 1K reads */ |
| if (max_tran > (1 - sib_funcs)) { |
| /* At most 2 outstanding transactions */ |
| max_tran = 1 - sib_funcs; |
| } |
| } |
| else { |
| /* 512 byte reads */ |
| max_read = 0; |
| if (max_tran > (2 - sib_funcs)) { |
| /* At most 3 outstanding transactions */ |
| max_tran = 2 - sib_funcs; |
| } |
| } |
| } |
| #if 0 |
| printk(BIOS_DEBUG, "%s max_read: %d max_tran: %d sibs: %d sib_funcs: %d\n", |
| dev_path(dev), max_read, max_tran, sibs, sib_funcs, sib_funcs); |
| #endif |
| if (max_read != ((cmd & PCI_X_CMD_MAX_READ) >> 2)) { |
| cmd &= ~PCI_X_CMD_MAX_READ; |
| cmd |= max_read << 2; |
| } |
| if (max_tran != ((cmd & PCI_X_CMD_MAX_SPLIT) >> 4)) { |
| cmd &= ~PCI_X_CMD_MAX_SPLIT; |
| cmd |= max_tran << 4; |
| } |
| |
| /* Don't attempt to handle PCI-X errors */ |
| cmd &= ~PCI_X_CMD_DPERR_E; |
| /* The 8131 does not work properly with relax ordering enabled. |
| * Errata #58 |
| */ |
| cmd &= ~PCI_X_CMD_ERO; |
| if (orig_cmd != cmd) { |
| pci_write_config16(dev, cap + PCI_X_CMD, cmd); |
| } |
| } |
| static unsigned int amd8131_scan_bus(struct bus *bus, |
| unsigned min_devfn, unsigned max_devfn, unsigned int max) |
| { |
| struct amd8131_bus_info info; |
| struct bus *pbus; |
| unsigned pos; |
| |
| |
| /* Find the children on the bus */ |
| max = pci_scan_bus(bus, min_devfn, max_devfn, max); |
| |
| /* Find the revision of the 8131 */ |
| info.rev = pci_read_config8(bus->dev, PCI_CLASS_REVISION); |
| |
| /* See which errata apply */ |
| info.errata_56 = info.rev <= 0x12; |
| |
| /* Find the pcix capability and get the secondary bus status */ |
| pos = pci_find_capability(bus->dev, PCI_CAP_ID_PCIX); |
| info.sstatus = pci_read_config16(bus->dev, pos + PCI_X_SEC_STATUS); |
| |
| /* Print the PCI-X bus speed */ |
| printk(BIOS_DEBUG, "PCI: %02x: %s\n", bus->secondary, pcix_speed(info.sstatus)); |
| |
| |
| /* Examine the bus and find out how loaded it is */ |
| info.max_func = 0; |
| info.master_devices = 0; |
| amd8131_walk_children(bus, amd8131_count_dev, &info); |
| |
| /* Disable the bus if there are no devices on it or |
| * we are running at 133Mhz and have a 4 function device. |
| * see errata #56 |
| */ |
| if (!bus->children || |
| (info.errata_56 && |
| (info.max_func >= 3) && |
| (PCI_X_SSTATUS_MFREQ(info.sstatus) == PCI_X_SSTATUS_MODE1_133MHZ))) |
| { |
| unsigned pcix_misc; |
| /* Disable all of my children */ |
| disable_children(bus); |
| |
| /* Remember the device is disabled */ |
| bus->dev->enabled = 0; |
| |
| /* Disable the PCI-X clocks */ |
| pcix_misc = pci_read_config32(bus->dev, 0x40); |
| pcix_misc &= ~(0x1f << 16); |
| pci_write_config32(bus->dev, 0x40, pcix_misc); |
| |
| return max; |
| } |
| |
| /* If we are in conventional PCI mode nothing more is necessary. |
| */ |
| if (PCI_X_SSTATUS_MFREQ(info.sstatus) == PCI_X_SSTATUS_CONVENTIONAL_PCI) { |
| return max; |
| } |
| |
| |
| /* Tune the devices on the bus */ |
| amd8131_walk_children(bus, amd8131_pcix_tune_dev, &info); |
| |
| /* Don't allow the 8131 or any of it's parent busses to |
| * implement relaxed ordering. Errata #58 |
| */ |
| for(pbus = bus; !pbus->disable_relaxed_ordering; pbus = pbus->dev->bus) { |
| printk(BIOS_SPEW, "%s disabling relaxed ordering\n", |
| bus_path(pbus)); |
| pbus->disable_relaxed_ordering = 1; |
| } |
| return max; |
| } |
| |
| static unsigned int amd8131_scan_bridge(device_t dev, unsigned int max) |
| { |
| return do_pci_scan_bridge(dev, max, amd8131_scan_bus); |
| } |
| |
| |
| static void amd8131_pcix_init(device_t dev) |
| { |
| uint32_t dword; |
| uint16_t word; |
| uint8_t byte; |
| int nmi_option; |
| |
| /* Enable memory write and invalidate ??? */ |
| byte = pci_read_config8(dev, 0x04); |
| byte |= 0x10; |
| pci_write_config8(dev, 0x04, byte); |
| |
| /* Set drive strength */ |
| word = pci_read_config16(dev, 0xe0); |
| word = 0x0404; |
| pci_write_config16(dev, 0xe0, word); |
| word = pci_read_config16(dev, 0xe4); |
| word = 0x0404; |
| pci_write_config16(dev, 0xe4, word); |
| |
| /* Set impedance */ |
| word = pci_read_config16(dev, 0xe8); |
| word = 0x0404; |
| pci_write_config16(dev, 0xe8, word); |
| |
| /* Set discard unrequested prefetch data */ |
| /* Errata #51 */ |
| word = pci_read_config16(dev, 0x4c); |
| word |= 1; |
| pci_write_config16(dev, 0x4c, word); |
| |
| /* Set split transaction limits */ |
| word = pci_read_config16(dev, 0xa8); |
| pci_write_config16(dev, 0xaa, word); |
| word = pci_read_config16(dev, 0xac); |
| pci_write_config16(dev, 0xae, word); |
| |
| /* Set up error reporting, enable all */ |
| /* system error enable */ |
| dword = pci_read_config32(dev, 0x04); |
| dword |= (1<<8); |
| pci_write_config32(dev, 0x04, dword); |
| |
| /* system and error parity enable */ |
| dword = pci_read_config32(dev, 0x3c); |
| dword |= (3<<16); |
| pci_write_config32(dev, 0x3c, dword); |
| |
| /* NMI enable */ |
| nmi_option = NMI_OFF; |
| get_option(&nmi_option, "nmi"); |
| if(nmi_option) { |
| dword = pci_read_config32(dev, 0x44); |
| dword |= (1<<0); |
| pci_write_config32(dev, 0x44, dword); |
| } |
| |
| /* Set up CRC flood enable */ |
| dword = pci_read_config32(dev, 0xc0); |
| if(dword) { /* do device A only */ |
| dword = pci_read_config32(dev, 0xc4); |
| dword |= (1<<1); |
| pci_write_config32(dev, 0xc4, dword); |
| dword = pci_read_config32(dev, 0xc8); |
| dword |= (1<<1); |
| pci_write_config32(dev, 0xc8, dword); |
| } |
| return; |
| } |
| |
| #define BRIDGE_40_BIT_SUPPORT 0 |
| #if BRIDGE_40_BIT_SUPPORT |
| static void bridge_read_resources(struct device *dev) |
| { |
| struct resource *res; |
| pci_bus_read_resources(dev); |
| res = find_resource(dev, PCI_MEMORY_BASE); |
| if (res) { |
| res->limit = 0xffffffffffULL; |
| } |
| } |
| |
| static void bridge_set_resources(struct device *dev) |
| { |
| struct resource *res; |
| res = find_resource(dev, PCI_MEMORY_BASE); |
| if (res) { |
| resource_t base, end; |
| /* set the memory range */ |
| dev->command |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER; |
| res->flags |= IORESOURCE_STORED; |
| base = res->base; |
| end = resource_end(res); |
| pci_write_config16(dev, PCI_MEMORY_BASE, base >> 16); |
| pci_write_config8(dev, NPUML, (base >> 32) & 0xff); |
| pci_write_config16(dev, PCI_MEMORY_LIMIT, end >> 16); |
| pci_write_config8(dev, NPUMB, (end >> 32) & 0xff); |
| |
| report_resource_stored(dev, res, ""); |
| } |
| pci_dev_set_resources(dev); |
| } |
| #endif /* BRIDGE_40_BIT_SUPPORT */ |
| |
| static struct device_operations pcix_ops = { |
| #if BRIDGE_40_BIT_SUPPORT |
| .read_resources = bridge_read_resources, |
| .set_resources = bridge_set_resources, |
| #else |
| .read_resources = pci_bus_read_resources, |
| .set_resources = pci_dev_set_resources, |
| #endif |
| .enable_resources = pci_bus_enable_resources, |
| .init = amd8131_pcix_init, |
| .scan_bus = amd8131_scan_bridge, |
| .reset_bus = pci_bus_reset, |
| }; |
| |
| static const struct pci_driver pcix_driver __pci_driver = { |
| .ops = &pcix_ops, |
| .vendor = PCI_VENDOR_ID_AMD, |
| .device = 0x7450, |
| }; |
| |
| |
| static void ioapic_enable(device_t dev) |
| { |
| uint32_t value; |
| |
| value = pci_read_config32(dev, 0x44); |
| if (dev->enabled) { |
| value |= ((1 << 1) | (1 << 0)); |
| } else { |
| value &= ~((1 << 1) | (1 << 0)); |
| } |
| pci_write_config32(dev, 0x44, value); |
| } |
| |
| static struct pci_operations pci_ops_pci_dev = { |
| .set_subsystem = pci_dev_set_subsystem, |
| }; |
| static struct device_operations ioapic_ops = { |
| .read_resources = pci_dev_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = 0, |
| .scan_bus = 0, |
| .enable = ioapic_enable, |
| .ops_pci = &pci_ops_pci_dev, |
| }; |
| |
| static const struct pci_driver ioapic_driver __pci_driver = { |
| .ops = &ioapic_ops, |
| .vendor = PCI_VENDOR_ID_AMD, |
| .device = 0x7451, |
| |
| }; |