diff options
Diffstat (limited to 'drivers/pch/pch9.c')
| -rw-r--r-- | drivers/pch/pch9.c | 54 |
1 files changed, 49 insertions, 5 deletions
diff --git a/drivers/pch/pch9.c b/drivers/pch/pch9.c index 529cb023e2..910eb61f48 100644 --- a/drivers/pch/pch9.c +++ b/drivers/pch/pch9.c @@ -8,9 +8,11 @@ #include <dm.h> #include <pch.h> +#define GPIO_BASE 0x48 +#define IO_BASE 0x4c #define SBASE_ADDR 0x54 -static int pch9_get_sbase(struct udevice *dev, ulong *sbasep) +static int pch9_get_spi_base(struct udevice *dev, ulong *sbasep) { uint32_t sbase_addr; @@ -20,14 +22,56 @@ static int pch9_get_sbase(struct udevice *dev, ulong *sbasep) return 0; } -static enum pch_version pch9_get_version(struct udevice *dev) +static int pch9_get_gpio_base(struct udevice *dev, u32 *gbasep) { - return PCHV_9; + 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 pch9_get_io_base(struct udevice *dev, u32 *iobasep) +{ + u32 base; + + dm_pci_read_config32(dev, IO_BASE, &base); + if (base == 0x00000000 || base == 0xffffffff) { + debug("%s: unexpected BASE value\n", __func__); + return -ENODEV; + } + + *iobasep = base & 1 ? base & ~3 : base & ~15; + + return 0; } static const struct pch_ops pch9_ops = { - .get_sbase = pch9_get_sbase, - .get_version = pch9_get_version, + .get_spi_base = pch9_get_spi_base, + .get_gpio_base = pch9_get_gpio_base, + .get_io_base = pch9_get_io_base, }; static const struct udevice_id pch9_ids[] = { |
