From 15de7cb4224b6add9a65d083e9a2e8484ae511b8 Mon Sep 17 00:00:00 2001 From: Duncan Laurie Date: Tue, 23 Apr 2013 13:44:37 -0700 Subject: lynxpoint: Add a function to set an individual GPIO This will be used in a later commit to do some specific power sequencing. Change-Id: Id7f033bb80aed915c2498ea910cb3ac7290da37f Signed-off-by: Duncan Laurie Reviewed-on: https://gerrit.chromium.org/gerrit/48947 Reviewed-by: Aaron Durbin Reviewed-on: http://review.coreboot.org/4137 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc --- src/southbridge/intel/lynxpoint/gpio.c | 19 +++++++++++++++++++ src/southbridge/intel/lynxpoint/lp_gpio.c | 14 ++++++++++++++ src/southbridge/intel/lynxpoint/pch.h | 4 ++++ 3 files changed, 37 insertions(+) diff --git a/src/southbridge/intel/lynxpoint/gpio.c b/src/southbridge/intel/lynxpoint/gpio.c index b492068ccd..147a1c013b 100644 --- a/src/southbridge/intel/lynxpoint/gpio.c +++ b/src/southbridge/intel/lynxpoint/gpio.c @@ -109,3 +109,22 @@ unsigned get_gpios(const int *gpio_num_array) } return vector; } + +void set_gpio(int gpio_num, int value) +{ + static const int gpio_reg_offsets[] = {0xc, 0x38, 0x48}; + u16 gpio_base = get_gpio_base(); + int index, bit; + u32 config; + + if (gpio_num > MAX_GPIO_NUMBER) + return; /* Just ignore wrong gpio numbers. */ + + index = gpio_num / 32; + bit = gpio_num % 32; + + config = inl(gpio_base + gpio_reg_offsets[index]); + config &= ~(1 << bit); + config |= value << bit; + outl(config, gpio_base + gpio_reg_offsets[index]); +} diff --git a/src/southbridge/intel/lynxpoint/lp_gpio.c b/src/southbridge/intel/lynxpoint/lp_gpio.c index d64555e668..b90e5ba4b8 100644 --- a/src/southbridge/intel/lynxpoint/lp_gpio.c +++ b/src/southbridge/intel/lynxpoint/lp_gpio.c @@ -107,3 +107,17 @@ unsigned get_gpios(const int *gpio_num_array) } return vector; } + +void set_gpio(int gpio_num, int value) +{ + u16 gpio_base = get_gpio_base(); + u32 conf0; + + if (gpio_num > MAX_GPIO_NUMBER) + return; + + conf0 = inl(gpio_base + GPIO_CONFIG0(gpio_num)); + conf0 &= ~GPO_LEVEL_MASK; + conf0 |= value << GPO_LEVEL_SHIFT; + outl(conf0, gpio_base + GPIO_CONFIG0(gpio_num)); +} diff --git a/src/southbridge/intel/lynxpoint/pch.h b/src/southbridge/intel/lynxpoint/pch.h index c04957308f..4bdb9268e9 100644 --- a/src/southbridge/intel/lynxpoint/pch.h +++ b/src/southbridge/intel/lynxpoint/pch.h @@ -193,6 +193,10 @@ int get_gpio(int gpio_num); * the array of gpio pin numbers to scan, terminated by -1. */ unsigned get_gpios(const int *gpio_num_array); +/* + * set GPIO pin value + */ +void set_gpio(int gpio_num, int value); #endif #define MAINBOARD_POWER_OFF 0 -- cgit v1.2.3