diff options
Diffstat (limited to 'roms/u-boot/arch/x86/cpu/ivybridge/bd82x6x.c')
| -rw-r--r-- | roms/u-boot/arch/x86/cpu/ivybridge/bd82x6x.c | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/roms/u-boot/arch/x86/cpu/ivybridge/bd82x6x.c b/roms/u-boot/arch/x86/cpu/ivybridge/bd82x6x.c new file mode 100644 index 000000000..0540b0216 --- /dev/null +++ b/roms/u-boot/arch/x86/cpu/ivybridge/bd82x6x.c @@ -0,0 +1,276 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2014 Google, Inc + */ +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <fdtdec.h> +#include <log.h> +#include <malloc.h> +#include <pch.h> +#include <asm/cpu.h> +#include <asm/global_data.h> +#include <asm/intel_regs.h> +#include <asm/io.h> +#include <asm/lapic.h> +#include <asm/lpc_common.h> +#include <asm/pci.h> +#include <asm/arch/model_206ax.h> +#include <asm/arch/pch.h> +#include <asm/arch/sandybridge.h> +#include <linux/bitops.h> +#include <linux/delay.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define GPIO_BASE 0x48 +#define BIOS_CTRL 0xdc + +#define RCBA_AUDIO_CONFIG 0x2030 +#define RCBA_AUDIO_CONFIG_HDA BIT(31) +#define RCBA_AUDIO_CONFIG_MASK 0xfe + +#ifndef CONFIG_HAVE_FSP +static int pch_revision_id = -1; +static int pch_type = -1; + +/** + * pch_silicon_revision() - Read silicon revision ID from the PCH + * + * @dev: PCH device + * @return silicon revision ID + */ +static int pch_silicon_revision(struct udevice *dev) +{ + u8 val; + + if (pch_revision_id < 0) { + dm_pci_read_config8(dev, PCI_REVISION_ID, &val); + pch_revision_id = val; + } + + return pch_revision_id; +} + +int pch_silicon_type(struct udevice *dev) +{ + u8 val; + + if (pch_type < 0) { + dm_pci_read_config8(dev, PCI_DEVICE_ID + 1, &val); + pch_type = val; + } + + return pch_type; +} + +/** + * pch_silicon_supported() - Check if a certain revision is supported + * + * @dev: PCH device + * @type: PCH type + * @rev: Minimum required resion + * @return 0 if not supported, 1 if supported + */ +static int pch_silicon_supported(struct udevice *dev, int type, int rev) +{ + int cur_type = pch_silicon_type(dev); + int cur_rev = pch_silicon_revision(dev); + + switch (type) { + case PCH_TYPE_CPT: + /* CougarPoint minimum revision */ + if (cur_type == PCH_TYPE_CPT && cur_rev >= rev) + return 1; + /* PantherPoint any revision */ + if (cur_type == PCH_TYPE_PPT) + return 1; + break; + + case PCH_TYPE_PPT: + /* PantherPoint minimum revision */ + if (cur_type == PCH_TYPE_PPT && cur_rev >= rev) + return 1; + break; + } + + return 0; +} + +#define IOBP_RETRY 1000 +static inline int iobp_poll(void) +{ + unsigned try = IOBP_RETRY; + u32 data; + + while (try--) { + data = readl(RCB_REG(IOBPS)); + if ((data & 1) == 0) + return 1; + udelay(10); + } + + printf("IOBP timeout\n"); + return 0; +} + +void pch_iobp_update(struct udevice *dev, u32 address, u32 andvalue, + u32 orvalue) +{ + u32 data; + + /* Set the address */ + writel(address, RCB_REG(IOBPIRI)); + + /* READ OPCODE */ + if (pch_silicon_supported(dev, PCH_TYPE_CPT, PCH_STEP_B0)) + writel(IOBPS_RW_BX, RCB_REG(IOBPS)); + else + writel(IOBPS_READ_AX, RCB_REG(IOBPS)); + if (!iobp_poll()) + return; + + /* Read IOBP data */ + data = readl(RCB_REG(IOBPD)); + if (!iobp_poll()) + return; + + /* Check for successful transaction */ + if ((readl(RCB_REG(IOBPS)) & 0x6) != 0) { + printf("IOBP read 0x%08x failed\n", address); + return; + } + + /* Update the data */ + data &= andvalue; + data |= orvalue; + + /* WRITE OPCODE */ + if (pch_silicon_supported(dev, PCH_TYPE_CPT, PCH_STEP_B0)) + writel(IOBPS_RW_BX, RCB_REG(IOBPS)); + else + writel(IOBPS_WRITE_AX, RCB_REG(IOBPS)); + if (!iobp_poll()) + return; + + /* Write IOBP data */ + writel(data, RCB_REG(IOBPD)); + if (!iobp_poll()) + return; +} + +static int bd82x6x_probe(struct udevice *dev) +{ + if (!(gd->flags & GD_FLG_RELOC)) + return 0; + + /* Cause the SATA device to do its init */ + uclass_first_device(UCLASS_AHCI, &dev); + + return 0; +} +#endif /* CONFIG_HAVE_FSP */ + +static int bd82x6x_pch_get_spi_base(struct udevice *dev, ulong *sbasep) +{ + u32 rcba; + + dm_pci_read_config32(dev, PCH_RCBA, &rcba); + /* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable */ + rcba = rcba & 0xffffc000; + *sbasep = rcba + 0x3800; + + return 0; +} + +static int bd82x6x_set_spi_protect(struct udevice *dev, bool protect) +{ + return lpc_set_spi_protect(dev, BIOS_CTRL, protect); +} + +static int bd82x6x_get_gpio_base(struct udevice *dev, u32 *gbasep) +{ + u32 base; + + /* + * GPIO_BASE moved to its current offset with ICH6, but prior to + * that it was unused (or undocumented). Check that it looks + * okay: not all ones or zeros. + * + * Note we don't need check bit0 here, because the Tunnel Creek + * GPIO base address register bit0 is reserved (read returns 0), + * while on the Ivybridge the bit0 is used to indicate it is an + * I/O space. + */ + dm_pci_read_config32(dev, GPIO_BASE, &base); + if (base == 0x00000000 || base == 0xffffffff) { + debug("%s: unexpected BASE value\n", __func__); + return -ENODEV; + } + + /* + * Okay, I guess we're looking at the right device. The actual + * GPIO registers are in the PCI device's I/O space, starting + * at the offset that we just read. Bit 0 indicates that it's + * an I/O address, not a memory address, so mask that off. + */ + *gbasep = base & 1 ? base & ~3 : base & ~15; + + return 0; +} + +static int bd82x6x_ioctl(struct udevice *dev, enum pch_req_t req, void *data, + int size) +{ + u32 rcba, val; + + switch (req) { + case PCH_REQ_HDA_CONFIG: + dm_pci_read_config32(dev, PCH_RCBA, &rcba); + val = readl(rcba + RCBA_AUDIO_CONFIG); + if (!(val & RCBA_AUDIO_CONFIG_HDA)) + return -ENOENT; + + return val & RCBA_AUDIO_CONFIG_MASK; + case PCH_REQ_PMBASE_INFO: { + struct pch_pmbase_info *pm = data; + int ret; + + /* Find the base address of the powermanagement registers */ + ret = dm_pci_read_config16(dev, 0x40, &pm->base); + if (ret) + return ret; + pm->base &= 0xfffe; + pm->gpio0_en_ofs = GPE0_EN; + pm->pm1_sts_ofs = PM1_STS; + pm->pm1_cnt_ofs = PM1_CNT; + + return 0; + } + default: + return -ENOSYS; + } +} + +static const struct pch_ops bd82x6x_pch_ops = { + .get_spi_base = bd82x6x_pch_get_spi_base, + .set_spi_protect = bd82x6x_set_spi_protect, + .get_gpio_base = bd82x6x_get_gpio_base, + .ioctl = bd82x6x_ioctl, +}; + +static const struct udevice_id bd82x6x_ids[] = { + { .compatible = "intel,bd82x6x" }, + { } +}; + +U_BOOT_DRIVER(bd82x6x_drv) = { + .name = "bd82x6x", + .id = UCLASS_PCH, + .of_match = bd82x6x_ids, +#ifndef CONFIG_HAVE_FSP + .probe = bd82x6x_probe, +#endif + .ops = &bd82x6x_pch_ops, +}; |