/* * Faraday FTPCI100 PCI Bridge Controller Device Driver Implementation * * Copyright (C) 2011 Andes Technology Corporation * Gavin Guo, Andes Technology Corporation * Macpaul Lin, Andes Technology Corporation * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #include /* u32, u16.... used by pci.h */ struct ftpci100_data { unsigned int reg_base; unsigned int io_base; unsigned int mem_base; unsigned int mmio_base; unsigned int ndevs; }; static struct pci_config devs[FTPCI100_MAX_FUNCTIONS]; static struct pci_controller local_hose; static void setup_pci_bar(unsigned int bus, unsigned int dev, unsigned func, unsigned char header, struct ftpci100_data *priv) { struct pci_controller *hose = (struct pci_controller *)&local_hose; unsigned int i, tmp32, bar_no, iovsmem = 1; pci_dev_t dev_nu; /* A device is present, add an entry to the array */ devs[priv->ndevs].bus = bus; devs[priv->ndevs].dev = dev; devs[priv->ndevs].func = func; dev_nu = PCI_BDF(bus, dev, func); if ((header & 0x7f) == 0x01) /* PCI-PCI Bridge */ bar_no = 2; else bar_no = 6; /* Allocate address spaces by configuring BARs */ for (i = 0; i < bar_no; i++) { pci_hose_write_config_dword(hose, dev_nu, PCI_BASE_ADDRESS_0 + i * 4, 0xffffffff); pci_hose_read_config_dword(hose, dev_nu, PCI_BASE_ADDRESS_0 + i * 4, &tmp32); if (tmp32 == 0x0) continue; /* IO space */ if (tmp32 & 0x1) { iovsmem = 0; unsigned int size_mask = ~(tmp32 & 0xfffffffc); if (priv->io_base & size_mask) priv->io_base = (priv->io_base & ~size_mask) + \ size_mask + 1; devs[priv->ndevs].bar[i].addr = priv->io_base; devs[priv->ndevs].bar[i].size = size_mask + 1; pci_hose_write_config_dword(hose, dev_nu, PCI_BASE_ADDRESS_0 + i * 4, priv->io_base); debug("Allocated IO address 0x%X-" \ "0x%X for Bus %d, Device %d, Function %d\n", priv->io_base, priv->io_base + size_mask, bus, dev, func); priv->io_base += size_mask + 1; } else { /* Memory space */ unsigned int is_64bit = ((tmp32 & 0x6) == 0x4); unsigned int is_pref = tmp32 & 0x8; unsigned int size_mask = ~(tmp32 & 0xfffffff0); unsigned int alloc_base; unsigned int *addr_mem_base; if (is_pref) addr_mem_base = &priv->mem_base; else addr_mem_base = &priv->mmio_base; alloc_base = *addr_mem_base; if (alloc_base & size_mask) alloc_base = (alloc_base & ~size_mask) \ + size_mask + 1; pci_hose_write_config_dword(hose, dev_nu, PCI_BASE_ADDRESS_0 + i * 4, alloc_base); debug("Allocated %s address 0x%X-" \ "0x%X for Bus %d, Device %d, Function %d\n", is_pref ? "MEM" : "MMIO", alloc_base, alloc_base + size_mask, bus, dev, func); devs[priv->ndevs].bar[i].addr = alloc_base; devs[priv->ndevs].bar[i].size = size_mask + 1; debug("BAR address BAR size\n"); debug("%010x %08d\n", devs[priv->ndevs].bar[0].addr, devs[priv->ndevs].bar[0].size); alloc_base += size_mask + 1; *addr_mem_base = alloc_base; if (is_64bit) { i++; pci_hose_write_config_dword(hose, dev_nu, PCI_BASE_ADDRESS_0 + i * 4, 0x0); } } } /* Enable Bus Master, Memory Space, and IO Space */ pci_hose_read_config_dword(hose, dev_nu, PCI_CACHE_LINE_SIZE, &tmp32); pci_hose_write_config_dword(hose, dev_nu, PCI_CACHE_LINE_SIZE, 0x08); pci_hose_read_config_dword(hose, dev_nu, PCI_CACHE_LINE_SIZE, &tmp32); pci_hose_read_config_dword(hose, dev_nu, PCI_COMMAND, &tmp32); tmp32 &= 0xffff; if (iovsmem == 0) tmp32 |= 0x5; else tmp32 |= 0x6; pci_hose_write_config_dword(hose, dev_nu, PCI_COMMAND, tmp32); } static void pci_bus_scan(struct ftpci100_data *priv) { struct pci_controller *hose = (struct pci_controller *)&local_hose; unsigned int bus, dev, func; pci_dev_t dev_nu; unsigned int data32; unsigned int tmp; unsigned char header; unsigned char int_pin; unsigned int niobars; unsigned int nmbars; priv->ndevs = 1; nmbars = 0; niobars = 0; for (bus = 0; bus < MAX_BUS_NUM; bus++) for (dev = 0; dev < MAX_DEV_NUM; dev++) for (func = 0; func < MAX_FUN_NUM; func++) { dev_nu = PCI_BDF(bus, dev, func); pci_hose_read_config_dword(hose, dev_nu, PCI_VENDOR_ID, &data32); /* * some broken boards return 0 or ~0, * if a slot is empty. */ if (data32 == 0xffffffff || data32 == 0x00000000 || data32 == 0x0000ffff || data32 == 0xffff0000) continue; pci_hose_read_config_dword(hose, dev_nu, PCI_HEADER_TYPE, &tmp); header = (unsigned char)tmp; setup_pci_bar(bus, dev, func, header, priv); devs[priv->ndevs].v_id = (u16)(data32 & \ 0x0000ffff); devs[priv->ndevs].d_id = (u16)((data32 & \ 0xffff0000) >> 16); /* Figure out what INTX# line the card uses */ pci_hose_read_config_byte(hose, dev_nu, PCI_INTERRUPT_PIN, &int_pin); /* assign the appropriate irq line */ if (int_pin > PCI_IRQ_LINES) { printf("more irq lines than expect\n"); } else if (int_pin != 0) { /* This device uses an interrupt line */ devs[priv->ndevs].pin = int_pin; } pci_hose_read_config_dword(hose, dev_nu, PCI_CLASS_DEVICE, &data32); debug("%06d %03d %03d " \ "%04d %08x %08x " \ "%03d %08x %06d %08x\n", priv->ndevs, devs[priv->ndevs].bus, devs[priv->ndevs].dev, devs[priv->ndevs].func, devs[priv->ndevs].d_id, devs[priv->ndevs].v_id, devs[priv->ndevs].pin, devs[priv->ndevs].bar[0].addr, devs[priv->ndevs].bar[0].size, data32 >> 8); priv->ndevs++; } } static void ftpci_preinit(struct ftpci100_data *priv) { struct ftpci100_ahbc *ftpci100; struct pci_controller *hose = (struct pci_controller *)&local_hose; u32 pci_config_addr; u32 pci_config_data; priv->reg_base = CONFIG_FTPCI100_BASE; priv->io_base = CONFIG_FTPCI100_BASE + CONFIG_FTPCI100_IO_SIZE; priv->mmio_base = CONFIG_FTPCI100_MEM_BASE; priv->mem_base = CONFIG_FTPCI100_MEM_BASE + CONFIG_FTPCI100_MEM_SIZE; ftpci100 = (struct ftpci100_ahbc *)priv->reg_base; pci_config_addr = (u32) &ftpci100->conf; pci_config_data = (u32) &ftpci100->data; /* print device name */ printf("FTPCI100\n"); /* dump basic configuration */ debug("%s: Config addr is %08X, data port is %08X\n", __func__, pci_config_addr, pci_config_data); /* PCI memory space */ pci_set_region(hose->regions + 0, CONFIG_PCI_MEM_BUS, CONFIG_PCI_MEM_PHYS, CONFIG_PCI_MEM_SIZE, PCI_REGION_MEM); hose->region_count++; /* PCI IO space */ pci_set_region(hose->regions + 1, CONFIG_PCI_IO_BUS, CONFIG_PCI_IO_PHYS, CONFIG_PCI_IO_SIZE, PCI_REGION_IO); hose->region_count++; #if defined(CONFIG_PCI_SYS_BUS) /* PCI System Memory space */ pci_set_region(hose->regions + 2, CONFIG_PCI_SYS_BUS, CONFIG_PCI_SYS_PHYS, CONFIG_PCI_SYS_SIZE, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY); hose->region_count++; #endif /* setup indirect read/write function */ pci_setup_indirect(hose, pci_config_addr, pci_config_data); /* register hose */ pci_register_hose(hose); } void pci_ftpci_init(void) { struct ftpci100_data *priv = NULL; struct pci_controller *hose = (struct pci_controller *)&local_hose; pci_dev_t bridge_num; struct pci_device_id bridge_ids[] = { {FTPCI100_BRIDGE_VENDORID, FTPCI100_BRIDGE_DEVICEID}, {0, 0} }; priv = malloc(sizeof(struct ftpci100_data)); if (!priv) { printf("%s(): failed to malloc priv\n", __func__); return; } memset(priv, 0, sizeof(struct ftpci100_data)); ftpci_preinit(priv); debug("Device bus dev func deviceID vendorID pin address" \ " size class\n"); pci_bus_scan(priv); /* * Setup the PCI Bridge Window to 1GB, * it will cause USB OHCI Host controller Unrecoverable Error * if it is not set. */ bridge_num = pci_find_devices(bridge_ids, 0); if (bridge_num == -1) { printf("PCI Bridge not found\n"); return; } pci_hose_write_config_dword(hose, bridge_num, PCI_MEM_BASE_SIZE1, FTPCI100_BASE_ADR_SIZE(1024)); }