/* * This file is part of the coreboot project. * * Copyright (C) 2010 Advanced Micro Devices, Inc. * Copyright (C) 2015 Timothy Pearson , Raptor Engineering * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "sb700.h" static void lpc_init(struct device *dev) { u8 byte; u32 dword; struct device *sm_dev; printk(BIOS_SPEW, "%s\n", __func__); /* Enable the LPC Controller */ sm_dev = pcidev_on_root(0x14, 0); dword = pci_read_config32(sm_dev, 0x64); dword |= 1 << 20; pci_write_config32(sm_dev, 0x64, dword); /* Initialize isa dma */ #if CONFIG(SOUTHBRIDGE_AMD_SB700_SKIP_ISA_DMA_INIT) printk(BIOS_DEBUG, "Skipping isa_dma_init() to avoid getting stuck.\n"); #else isa_dma_init(); #endif if (!CONFIG(SOUTHBRIDGE_AMD_SB700_DISABLE_ISA_DMA)) { /* Enable DMA transaction on the LPC bus */ byte = pci_read_config8(dev, 0x40); byte |= (1 << 2); pci_write_config8(dev, 0x40, byte); } /* Disable the timeout mechanism on LPC */ byte = pci_read_config8(dev, 0x48); byte &= ~(1 << 7); pci_write_config8(dev, 0x48, byte); /* Disable LPC MSI Capability */ byte = pci_read_config8(dev, 0x78); byte &= ~(1 << 1); #if CONFIG(SOUTHBRIDGE_AMD_SUBTYPE_SP5100) /* Disable FlowContrl, Always service the request from Host * whenever there is a request from Host pending */ byte &= ~(1 << 0); #endif pci_write_config8(dev, 0x78, byte); cmos_check_update_date(); setup_i8259(); /* Initialize i8259 pic */ setup_i8254(); /* Initialize i8254 timers */ } static void sb700_lpc_read_resources(struct device *dev) { struct resource *res; /* Get the normal pci resources of this device */ pci_dev_read_resources(dev); /* We got one for APIC, or one more for TRAP */ pci_get_resource(dev, 0xA0); /* SPI ROM base address */ /* Add an extra subtractive resource for both memory and I/O. */ res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0)); res->base = 0; res->size = 0x1000; res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0)); res->base = 0xff800000; res->size = 0x00800000; /* 8 MB for flash */ res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; res = new_resource(dev, 3); /* IOAPIC */ res->base = IO_APIC_ADDR; res->size = 0x00001000; res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; compact_resources(dev); } static void sb700_lpc_set_resources(struct device *dev) { struct resource *res; pci_dev_set_resources(dev); /* Special case. SPI Base Address. The SpiRomEnable should be set. */ res = find_resource(dev, 0xA0); pci_write_config32(dev, 0xA0, res->base | 1 << 1); } /** * @brief Enable resources for children devices * * @param dev the device whose children's resources are to be enabled * */ static void sb700_lpc_enable_childrens_resources(struct device *dev) { struct bus *link; u32 reg, reg_x; int var_num = 0; u16 reg_var[3] = {0x0, 0x0, 0x0}; u8 wiosize = pci_read_config8(dev, 0x74); reg = pci_read_config32(dev, 0x44); reg_x = pci_read_config32(dev, 0x48); for (link = dev->link_list; link; link = link->next) { struct device *child; for (child = link->children; child; child = child->sibling) { if (!(child->enabled && (child->path.type == DEVICE_PATH_PNP))) continue; struct resource *res; for (res = child->resource_list; res; res = res->next) { u32 base, end; /* don't need long long */ if (!(res->flags & IORESOURCE_IO)) continue; base = res->base; end = resource_end(res); printk(BIOS_DEBUG, "sb700 lpc decode:%s," " base=0x%08x, end=0x%08x\n", dev_path(child), base, end); switch (base) { case 0x60: /* KB */ case 0x64: /* MS */ reg |= (1 << 29); break; case 0x3f8: /* COM1 */ reg |= (1 << 6); break; case 0x2f8: /* COM2 */ reg |= (1 << 7); break; case 0x378: /* Parallel 1 */ reg |= (1 << 0); reg |= (1 << 1); /* + 0x778 for ECP */ break; case 0x3f0: /* FD0 */ reg |= (1 << 26); break; case 0x220: /* Audio 0 */ reg |= (1 << 8); break; case 0x300: /* Midi 0 */ reg |= (1 << 18); break; case 0x400: reg_x |= (1 << 16); break; case 0x480: reg_x |= (1 << 17); break; case 0x500: reg_x |= (1 << 18); break; case 0x580: reg_x |= (1 << 19); break; case 0x4700: reg_x |= (1 << 22); break; case 0xfd60: reg_x |= (1 << 23); break; default: /* only 3 var ; compact them ? */ if (var_num >= 3) continue; switch (var_num) { case 0: reg_x |= (1 << 2); if ((end - base) < 16) wiosize |= (1 << 0); break; case 1: reg_x |= (1 << 24); if ((end - base) < 16) wiosize |= (1 << 2); break; case 2: reg_x |= (1 << 25); reg_x |= (1 << 24); if ((end - base) < 16) wiosize |= (1 << 3); break; } reg_var[var_num++] = base & 0xffff; } } } } pci_write_config32(dev, 0x44, reg); pci_write_config32(dev, 0x48, reg_x); /* Set WideIO for as many IOs found (fall through is on purpose) */ switch (var_num) { case 3: pci_write_config16(dev, 0x90, reg_var[2]); /* fall through */ case 2: pci_write_config16(dev, 0x66, reg_var[1]); /* fall through */ case 1: pci_write_config16(dev, 0x64, reg_var[0]); break; } pci_write_config8(dev, 0x74, wiosize); } static void sb700_lpc_enable_resources(struct device *dev) { pci_dev_enable_resources(dev); sb700_lpc_enable_childrens_resources(dev); } #if CONFIG(HAVE_ACPI_TABLES) static void southbridge_acpi_fill_ssdt_generator(struct device *device) { amd_generate_powernow(ACPI_CPU_CONTROL, 6, 1); } static const char *lpc_acpi_name(const struct device *dev) { if (dev->path.type != DEVICE_PATH_PCI) return NULL; switch (dev->path.pci.devfn) { case PCI_DEVFN(0x14, 3): return "LPC"; } return NULL; } #endif static struct pci_operations lops_pci = { .set_subsystem = pci_dev_set_subsystem, }; static struct device_operations lpc_ops = { .read_resources = sb700_lpc_read_resources, .set_resources = sb700_lpc_set_resources, .enable_resources = sb700_lpc_enable_resources, #if CONFIG(HAVE_ACPI_TABLES) .acpi_name = lpc_acpi_name, .write_acpi_tables = acpi_write_hpet, .acpi_fill_ssdt_generator = southbridge_acpi_fill_ssdt_generator, #endif .init = lpc_init, .scan_bus = scan_static_bus, .ops_pci = &lops_pci, }; static const struct pci_driver lpc_driver __pci_driver = { .ops = &lpc_ops, .vendor = PCI_VENDOR_ID_ATI, .device = PCI_DEVICE_ID_ATI_SB700_LPC, };