diff options
Diffstat (limited to 'drivers/pch/pch7.c')
| -rw-r--r-- | drivers/pch/pch7.c | 43 |
1 files changed, 35 insertions, 8 deletions
diff --git a/drivers/pch/pch7.c b/drivers/pch/pch7.c index ef724221c2..302c9299ee 100644 --- a/drivers/pch/pch7.c +++ b/drivers/pch/pch7.c @@ -8,9 +8,10 @@ #include <dm.h> #include <pch.h> +#define GPIO_BASE 0x44 #define BIOS_CTRL 0xd8 -static int pch7_get_sbase(struct udevice *dev, ulong *sbasep) +static int pch7_get_spi_base(struct udevice *dev, ulong *sbasep) { u32 rcba; @@ -22,11 +23,6 @@ static int pch7_get_sbase(struct udevice *dev, ulong *sbasep) return 0; } -static enum pch_version pch7_get_version(struct udevice *dev) -{ - return PCHV_7; -} - static int pch7_set_spi_protect(struct udevice *dev, bool protect) { uint8_t bios_cntl; @@ -42,10 +38,41 @@ static int pch7_set_spi_protect(struct udevice *dev, bool protect) return 0; } +static int pch7_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 const struct pch_ops pch7_ops = { - .get_sbase = pch7_get_sbase, - .get_version = pch7_get_version, + .get_spi_base = pch7_get_spi_base, .set_spi_protect = pch7_set_spi_protect, + .get_gpio_base = pch7_get_gpio_base, }; static const struct udevice_id pch7_ids[] = { |