From b71eec3129c2626bfb1e98141b317d958e3cf384 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Wed, 17 Dec 2014 15:50:38 +0800 Subject: [PATCH] x86: ich6-gpio: Add Intel Tunnel Creek GPIO support Intel Tunnel Creek GPIO register block is compatible with current ich6-gpio driver, except the offset and content of GPIO block base address register in the LPC PCI configuration space are different. Use u16 instead of u32 to store the 16-bit I/O address of the GPIO registers so that it could support both Ivybridge and Tunnel Creek. Signed-off-by: Bin Meng Acked-by: Simon Glass --- arch/x86/include/asm/arch-queensbay/gpio.h | 13 +++++++++++++ arch/x86/include/asm/gpio.h | 4 ++-- board/coreboot/coreboot/coreboot.c | 2 +- board/google/chromebook_link/link.c | 2 +- board/intel/crownbay/crownbay.c | 5 +++++ drivers/gpio/intel_ich6_gpio.c | 20 ++++++++++++-------- 6 files changed, 34 insertions(+), 12 deletions(-) create mode 100644 arch/x86/include/asm/arch-queensbay/gpio.h diff --git a/arch/x86/include/asm/arch-queensbay/gpio.h b/arch/x86/include/asm/arch-queensbay/gpio.h new file mode 100644 index 0000000000..ab4e059131 --- /dev/null +++ b/arch/x86/include/asm/arch-queensbay/gpio.h @@ -0,0 +1,13 @@ +/* + * Copyright (C) 2014, Bin Meng + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _X86_ARCH_GPIO_H_ +#define _X86_ARCH_GPIO_H_ + +/* Where in config space is the register that points to the GPIO registers? */ +#define PCI_CFG_GPIOBASE 0x44 + +#endif /* _X86_ARCH_GPIO_H_ */ diff --git a/arch/x86/include/asm/gpio.h b/arch/x86/include/asm/gpio.h index 1787e5210c..1099427388 100644 --- a/arch/x86/include/asm/gpio.h +++ b/arch/x86/include/asm/gpio.h @@ -11,7 +11,7 @@ #include struct ich6_bank_platdata { - uint32_t base_addr; + uint16_t base_addr; const char *bank_name; }; @@ -147,7 +147,7 @@ struct pch_gpio_map { } set3; }; -void setup_pch_gpios(u32 gpiobase, const struct pch_gpio_map *gpio); +void setup_pch_gpios(u16 gpiobase, const struct pch_gpio_map *gpio); void ich_gpio_set_gpio_map(const struct pch_gpio_map *map); #endif /* _X86_GPIO_H_ */ diff --git a/board/coreboot/coreboot/coreboot.c b/board/coreboot/coreboot/coreboot.c index b260f9a163..154faf6239 100644 --- a/board/coreboot/coreboot/coreboot.c +++ b/board/coreboot/coreboot/coreboot.c @@ -16,7 +16,7 @@ int arch_early_init_r(void) return 0; } -void setup_pch_gpios(u32 gpiobase, const struct pch_gpio_map *gpio) +void setup_pch_gpios(u16 gpiobase, const struct pch_gpio_map *gpio) { return; } diff --git a/board/google/chromebook_link/link.c b/board/google/chromebook_link/link.c index 4d95c1c927..9978e92006 100644 --- a/board/google/chromebook_link/link.c +++ b/board/google/chromebook_link/link.c @@ -125,7 +125,7 @@ int board_early_init_f(void) return 0; } -void setup_pch_gpios(u32 gpiobase, const struct pch_gpio_map *gpio) +void setup_pch_gpios(u16 gpiobase, const struct pch_gpio_map *gpio) { /* GPIO Set 1 */ if (gpio->set1.level) diff --git a/board/intel/crownbay/crownbay.c b/board/intel/crownbay/crownbay.c index 8c6df98bf7..54670d3ac7 100644 --- a/board/intel/crownbay/crownbay.c +++ b/board/intel/crownbay/crownbay.c @@ -19,3 +19,8 @@ int board_early_init_f(void) return 0; } + +void setup_pch_gpios(u16 gpiobase, const struct pch_gpio_map *gpio) +{ + return; +} diff --git a/drivers/gpio/intel_ich6_gpio.c b/drivers/gpio/intel_ich6_gpio.c index 3433216cb6..7720cc3dad 100644 --- a/drivers/gpio/intel_ich6_gpio.c +++ b/drivers/gpio/intel_ich6_gpio.c @@ -39,9 +39,9 @@ struct ich6_bank_priv { /* These are I/O addresses */ - uint32_t use_sel; - uint32_t io_sel; - uint32_t lvl; + uint16_t use_sel; + uint16_t io_sel; + uint16_t lvl; }; /* TODO: Move this to device tree, or platform data */ @@ -57,7 +57,7 @@ static int gpio_ich6_ofdata_to_platdata(struct udevice *dev) u8 tmpbyte; u16 tmpword; u32 tmplong; - u32 gpiobase; + u16 gpiobase; int offset; /* Where should it be? */ @@ -116,11 +116,15 @@ static int gpio_ich6_ofdata_to_platdata(struct udevice *dev) /* * GPIOBASE 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, and mapped to I/O space (bit 0). + * 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. */ tmplong = pci_read_config32(pci_dev, PCI_CFG_GPIOBASE); - if (tmplong == 0x00000000 || tmplong == 0xffffffff || - !(tmplong & 0x00000001)) { + if (tmplong == 0x00000000 || tmplong == 0xffffffff) { debug("%s: unexpected GPIOBASE value\n", __func__); return -ENODEV; } @@ -131,7 +135,7 @@ static int gpio_ich6_ofdata_to_platdata(struct udevice *dev) * 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. */ - gpiobase = tmplong & 0xfffffffe; + gpiobase = tmplong & 0xfffe; offset = fdtdec_get_int(gd->fdt_blob, dev->of_offset, "reg", -1); if (offset == -1) { debug("%s: Invalid register offset %d\n", __func__, offset);