static void init(struct device *dev) { volatile u8 *spi_base; // base addr of Hudson's SPI host controller int i; printk(BIOS_DEBUG, CONFIG_MAINBOARD_PART_NUMBER " ENTER %s\n", __func__); /* Init Hudson GPIOs. */ printk(BIOS_DEBUG, "Init FCH GPIOs @ 0x%08x\n", ACPI_MMIO_BASE+GPIO_BASE); FCH_IOMUX( 50) = 2; // GPIO50: FCH_ARST#_GATE resets stuck PCIe devices FCH_GPIO ( 50) = 0xC0; // = output set to 1 as it's never needed FCH_IOMUX(197) = 2; // GPIO197: BIOS_DEFAULTS# FCH_GPIO (197) = 0x28; // = input, disable int. pull-up FCH_IOMUX( 56) = 1; // GPIO58-56: REV_ID2-0 FCH_GPIO ( 56) = 0x28; // = inputs, disable int. pull-ups FCH_IOMUX( 57) = 1; FCH_GPIO ( 57) = 0x28; FCH_IOMUX( 58) = 1; FCH_GPIO ( 58) = 0x28; FCH_IOMUX(187) = 2; // GPIO187,188,166,GPO160: GPO0-3 on COM Express connector FCH_GPIO (187) = 0x08; // = outputs, disable PUs, default to 0 FCH_IOMUX(188) = 2; FCH_GPIO (188) = 0x08; FCH_IOMUX(166) = 2; FCH_GPIO (166) = 0x08; // needed to make GPO160 work (Hudson Register Reference section 2.3.6.1) FCH_PMIO(0xDC) &= ~0x80; FCH_PMIO(0xE6) = (FCH_PMIO(0xE6) & ~0x02) | 0x01; FCH_IOMUX(160) = 1; FCH_GPIO (160) = 0x08; FCH_IOMUX(189) = 1; // GPIO189-192: GPI0-3 on COM Express connector FCH_IOMUX(190) = 1; // default to inputs with int. PU FCH_IOMUX(191) = 1; FCH_IOMUX(192) = 1; if (!fch_gpio_state(197)) // just in case anyone cares printk(BIOS_INFO, "BIOS_DEFAULTS jumper is present.\n"); printk(BIOS_INFO, "Board revision ID: %u\n", fch_gpio_state(58)<<2 | fch_gpio_state(57)<<1 | fch_gpio_state(56)); /* Lower SPI speed from default 66 to 22 MHz for SST 25VF032B */ spi_base = (u8*)(pci_read_config32(dev_find_slot(0, PCI_DEVFN(0x14, 3)), 0xA0) & 0xFFFFFFE0); spi_base[0x0D] = (spi_base[0x0D] & ~0x30) | 0x20; // NormSpeed in SPI_Cntrl1 register /* Notify the SMC we're alive and kicking, or after a while it will * effect a power cycle and switch to the alternate BIOS chip. * Should be done as late as possible. */ printk(BIOS_INFO, "Sending BIOS alive message\n"); const u8 i_am_alive[] = { 0x03 }; //bit2=SEL_DP0: 0=DDI2, 1=LVDS if ((i = smb_write_blk(0x50, 0x25, sizeof(i_am_alive), i_am_alive))) printk(BIOS_ERR, "smb_write_blk failed: %d\n", i); printk(BIOS_DEBUG, CONFIG_MAINBOARD_PART_NUMBER " EXIT %s\n", __func__); }
static void init(struct device *dev) { volatile u8 *spi_base; // base addr of Hudson's SPI host controller printk(BIOS_DEBUG, CONFIG_MAINBOARD_PART_NUMBER " ENTER %s\n", __func__); /* Init Hudson GPIOs. */ printk(BIOS_DEBUG, "Init FCH GPIOs @ 0x%08x\n", ACPI_MMIO_BASE+GPIO_BASE); FCH_IOMUX(50) = 2; // GPIO50: FCH_ARST#_GATE resets stuck PCIe devices FCH_GPIO (50) = 0xC0; // = output set to 1 as it's never needed FCH_IOMUX(197) = 2; // GPIO197: BIOS_DEFAULTS# FCH_GPIO (197) = 0x28; // = input, disable int. pull-up FCH_IOMUX(56) = 1; // GPIO58-56: REV_ID2-0 FCH_GPIO (56) = 0x28; // = inputs, disable int. pull-ups FCH_IOMUX(57) = 1; FCH_GPIO (57) = 0x28; FCH_IOMUX(58) = 1; FCH_GPIO (58) = 0x28; FCH_IOMUX(187) = 2; // GPIO187,188,166,GPO160: GPO0-3 on COM Express connector FCH_GPIO (187) = 0x08; // = outputs, disable PUs, default to 0 FCH_IOMUX(188) = 2; FCH_GPIO (188) = 0x08; FCH_IOMUX(166) = 2; FCH_GPIO (166) = 0x08; // needed to make GPO160 work (Hudson Register Reference section 2.3.6.1) FCH_PMIO(0xDC) &= ~0x80; FCH_PMIO(0xE6) = (FCH_PMIO(0xE6) & ~0x02) | 0x01; FCH_IOMUX(160) = 1; FCH_GPIO (160) = 0x08; FCH_IOMUX(189) = 1; // GPIO189-192: GPI0-3 on COM Express connector FCH_IOMUX(190) = 1; // default to inputs with int. PU FCH_IOMUX(191) = 1; FCH_IOMUX(192) = 1; if (!fch_gpio_state(197)) // just in case anyone cares printk(BIOS_INFO, "BIOS_DEFAULTS jumper is present.\n"); printk(BIOS_INFO, "Board revision ID: %u\n", fch_gpio_state(58)<<2 | fch_gpio_state(57)<<1 | fch_gpio_state(56)); /* Lower SPI speed from default 66 to 22 MHz for SST 25VF032B */ spi_base = (u8 *)((uintptr_t)pci_read_config32(pcidev_on_root(0x14, 3), 0xA0) & 0xFFFFFFE0); spi_base[0x0D] = (spi_base[0x0D] & ~0x30) | 0x20; // NormSpeed in SPI_Cntrl1 register /* Notify the SMC we're alive and kicking, or after a while it will * effect a power cycle and switch to the alternate BIOS chip. * Should be done as late as possible. * Failure here does not matter if watchdog was already disabled, * by configuration or previous boot, so ignore return value. */ sema_send_alive(); printk(BIOS_DEBUG, CONFIG_MAINBOARD_PART_NUMBER " EXIT %s\n", __func__); }