/* SPDX-License-Identifier: GPL-2.0-only */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "hudson.h" #include "pci_devs.h" static void lpc_init(struct device *dev) { u8 byte; u32 dword; struct device *sm_dev; /* 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 */ isa_dma_init(); /* 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); byte &= ~(1 << 0); /* Keep the old way. i.e., when bus master/DMA cycle is running on LPC, it holds PCI grant, so no LPC slave cycle can interrupt and visit LPC. */ pci_write_config8(dev, 0x78, byte); /* bit0: Enable prefetch a cacheline (64 bytes) when Host reads code from SPI ROM */ /* bit3: Fix SPI_CS# timing issue when running at 66M. TODO:A12. */ byte = pci_read_config8(dev, 0xBB); byte |= 1 << 0 | 1 << 3; pci_write_config8(dev, 0xBB, byte); cmos_check_update_date(); /* Initialize the real time clock. * The 0 argument tells cmos_init not to * update CMOS unless it is invalid. * 1 tells cmos_init to always initialize the CMOS. */ cmos_init(0); /* Initialize i8259 pic */ setup_i8259(); /* Initialize i8254 timers */ setup_i8254(); /* Set up SERIRQ, enable continuous mode */ byte = (BIT(4) | BIT(7)); if (!CONFIG(SERIRQ_CONTINUOUS_MODE)) byte |= BIT(6); pm_write8(PM_SERIRQ_CONF, byte); } static void hudson_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 */ /* 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; /* Add a memory resource for the SPI BAR. */ mmio_range(dev, 2, SPI_BASE_ADDRESS, 1 * KiB); 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 hudson_lpc_set_resources(struct device *dev) { struct resource *res; u32 spi_enable_bits; /* Special case. The SpiRomEnable and other enables should STAY set. */ res = find_resource(dev, 2); spi_enable_bits = pci_read_config32(dev, SPIROM_BASE_ADDRESS_REGISTER); spi_enable_bits &= 0xF; pci_write_config32(dev, SPIROM_BASE_ADDRESS_REGISTER, res->base | spi_enable_bits); pci_dev_set_resources(dev); } /** * @brief Enable resources for children devices * * @param dev the device whose children's resources are to be enabled * */ static void hudson_lpc_enable_childrens_resources(struct device *dev) { struct bus *link; u32 reg, reg_x; int var_num = 0; u16 reg_var[3]; u16 reg_size[1] = {512}; u8 wiosize = pci_read_config8(dev, 0x74); /* Be bit relaxed, tolerate that LPC region might be bigger than resource we try to fit, * do it like this for all regions < 16 bytes. If there is a resource > 16 bytes * it must be 512 bytes to be able to allocate the fresh LPC window. * * AGESA likes to enable already one LPC region in wide port base 0x64-0x65, * using DFLT_SIO_PME_BASE_ADDRESS, 512 bytes size * The code tries to check if resource can fit into this region */ reg = pci_read_config32(dev, 0x44); reg_x = pci_read_config32(dev, 0x48); /* check if ranges are free and not use them if entry is just already taken */ if (reg_x & (1 << 2)) var_num = 1; /* just in case check if someone did not manually set other ranges too */ if (reg_x & (1 << 24)) var_num = 2; if (reg_x & (1 << 25)) var_num = 3; /* check AGESA region size */ if (wiosize & (1 << 0)) reg_size[0] = 16; reg_var[2] = pci_read_config16(dev, 0x90); reg_var[1] = pci_read_config16(dev, 0x66); reg_var[0] = pci_read_config16(dev, 0x64); 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)) { struct resource *res; for (res = child->resource_list; res; res = res->next) { u32 base, end; /* don't need long long */ u32 rsize, set = 0, set_x = 0; if (!(res->flags & IORESOURCE_IO)) continue; base = res->base; end = resource_end(res); /* find a resource size */ printk(BIOS_DEBUG, "hudson lpc decode:%s, base=0x%08x, end=0x%08x\n", dev_path(child), base, end); switch (base) { case 0x60: /* KB */ case 0x64: /* MS */ set |= (1 << 29); rsize = 1; break; case 0x3f8: /* COM1 */ set |= (1 << 6); rsize = 8; break; case 0x2f8: /* COM2 */ set |= (1 << 7); rsize = 8; break; case 0x378: /* Parallel 1 */ set |= (1 << 0); set |= (1 << 1); /* + 0x778 for ECP */ rsize = 8; break; case 0x3f0: /* FD0 */ set |= (1 << 26); rsize = 8; break; case 0x220: /* 0x220 - 0x227 */ set |= (1 << 8); rsize = 8; break; case 0x228: /* 0x228 - 0x22f */ set |= (1 << 9); rsize = 8; break; case 0x238: /* 0x238 - 0x23f */ set |= (1 << 10); rsize = 8; break; case 0x300: /* 0x300 -0x301 */ set |= (1 << 18); rsize = 2; break; case 0x400: set_x |= (1 << 16); rsize = 0x40; break; case 0x480: set_x |= (1 << 17); rsize = 0x40; break; case 0x500: set_x |= (1 << 18); rsize = 0x40; break; case 0x580: set_x |= (1 << 19); rsize = 0x40; break; case 0x4700: set_x |= (1 << 22); rsize = 0xc; break; case 0xfd60: set_x |= (1 << 23); rsize = 16; break; default: rsize = 0; /* try AGESA allocated region in region 0 */ if ((var_num > 0) && ((base >= reg_var[0]) && ((base + res->size) <= (reg_var[0] + reg_size[0])))) rsize = reg_size[0]; } /* check if region found and matches the enable */ if (res->size <= rsize) { reg |= set; reg_x |= set_x; /* check if we can fit resource in variable range */ } else if ((var_num < 3) && ((res->size <= 16) || (res->size == 512))) { /* use variable ranges if pre-defined do not match */ switch (var_num) { case 0: reg_x |= (1 << 2); if (res->size <= 16) { wiosize |= (1 << 0); } break; case 1: reg_x |= (1 << 24); if (res->size <= 16) wiosize |= (1 << 2); break; case 2: reg_x |= (1 << 25); if (res->size <= 16) wiosize |= (1 << 3); break; } reg_var[var_num++] = base & 0xffff; } else { printk(BIOS_ERR, "cannot fit LPC decode region:%s, base=0x%08x, end=0x%08x\n", dev_path(child), base, end); } } } } } 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]); __fallthrough; case 2: pci_write_config16(dev, 0x66, reg_var[1]); __fallthrough; case 1: pci_write_config16(dev, 0x64, reg_var[0]); break; } pci_write_config8(dev, 0x74, wiosize); } static void hudson_lpc_enable_resources(struct device *dev) { pci_dev_enable_resources(dev); hudson_lpc_enable_childrens_resources(dev); } static const char *lpc_acpi_name(const struct device *dev) { if (dev->path.type != DEVICE_PATH_PCI) return NULL; if (dev->path.pci.devfn == LPC_DEVFN) return "LIBR"; return NULL; } static void lpc_final(struct device *dev) { if (!acpi_is_wakeup_s3()) { if (CONFIG(HAVE_SMI_HANDLER)) outl(0x0, ACPI_PM1_CNT_BLK); /* clear SCI_EN */ else outl(0x1, ACPI_PM1_CNT_BLK); /* set SCI_EN */ } } static struct device_operations lpc_ops = { .read_resources = hudson_lpc_read_resources, .set_resources = hudson_lpc_set_resources, .enable_resources = hudson_lpc_enable_resources, #if CONFIG(HAVE_ACPI_TABLES) .write_acpi_tables = acpi_write_hpet, #endif .init = lpc_init, .final = lpc_final, .scan_bus = scan_static_bus, .ops_pci = &pci_dev_ops_pci, .acpi_name = lpc_acpi_name, }; static const unsigned short pci_device_ids[] = { /* PCI device ID is used on all discrete FCHs and Family 16h Models 00h-3Fh */ PCI_DID_AMD_SB900_LPC, /* PCI device ID is used on all integrated FCHs except Family 16h Models 00h-3Fh */ PCI_DID_AMD_CZ_LPC, 0 }; static const struct pci_driver lpc_driver __pci_driver = { .ops = &lpc_ops, .vendor = PCI_VID_AMD, .devices = pci_device_ids, };