diff options
Diffstat (limited to 'arch/arm/mach-ux500/board-pins-sleep-force.c')
| -rw-r--r-- | arch/arm/mach-ux500/board-pins-sleep-force.c | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/arch/arm/mach-ux500/board-pins-sleep-force.c b/arch/arm/mach-ux500/board-pins-sleep-force.c new file mode 100644 index 00000000000..91eb1cefc22 --- /dev/null +++ b/arch/arm/mach-ux500/board-pins-sleep-force.c @@ -0,0 +1,269 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * + * License terms: GNU General Public License (GPL) version 2 + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/gpio.h> +#include <linux/io.h> +#include <linux/string.h> + +#include <linux/gpio/nomadik.h> +#include <mach/hardware.h> + +#include "board-pins-sleep-force.h" +#include "pins-db8500.h" +#include "pins.h" + +static u32 u8500_gpio_banks[] = {U8500_GPIOBANK0_BASE, + U8500_GPIOBANK1_BASE, + U8500_GPIOBANK2_BASE, + U8500_GPIOBANK3_BASE, + U8500_GPIOBANK4_BASE, + U8500_GPIOBANK5_BASE, + U8500_GPIOBANK6_BASE, + U8500_GPIOBANK7_BASE, + U8500_GPIOBANK8_BASE}; + +/* + * This function is called to force gpio power save + * settings during suspend. + */ +void sleep_pins_config_pm(pin_cfg_t *cfgs, int num) +{ + int i = 0; + int gpio = 0; + u32 w_imsc = 0; + u32 imsc = 0; + u32 offset; + u32 bitmask = 1; + u32 dirs_register = 0; + u32 dirc_register = 0; + u32 dats_register = 0; + u32 datc_register = 0; + u32 pdis_register_disable = 0; + u32 pdis_register_enabled = 0; + u32 slpm_register_disabled = 0; + u32 slpm_register_enabled = 0; + u32 bankaddr = 0; + + gpio = PIN_NUM(cfgs[i]); + + /* Get the bank number the pin is mapped to */ + bankaddr = IO_ADDRESS(u8500_gpio_banks[(gpio >> GPIO_BLOCK_SHIFT)]); + + w_imsc = readl(bankaddr + NMK_GPIO_RWIMSC) | + readl(bankaddr + NMK_GPIO_FWIMSC); + + imsc = readl(bankaddr + NMK_GPIO_RIMSC) | + readl(bankaddr + NMK_GPIO_FIMSC); + + for (i = 0; i < num; i++) { + /* Get the pin number */ + gpio = PIN_NUM(cfgs[i]); + + /* get the offest into the register */ + offset = gpio % NMK_GPIO_PER_CHIP; + /* Set the bit to toggle */ + bitmask = 1 << offset ; + + /* Next we check for direction (INPUT/OUTPUT) */ + switch (PIN_SLPM_DIR(cfgs[i])) { + case GPIO_IS_INPUT: + /* GPIO is set to input */ + dirc_register |= bitmask; + + /* + * Next check for pull (PULLUP/PULLDOWN) + * and configure accordingly. + */ + switch (PIN_SLPM_PULL(cfgs[i])) { + case GPIO_PULL_UPDOWN_DISABLED: + pdis_register_disable |= bitmask; + break; + + case GPIO_IS_PULLUP: + dats_register |= bitmask; + pdis_register_enabled |= bitmask; + break; + + case GPIO_IS_PULLDOWN: + datc_register |= bitmask; + pdis_register_enabled |= bitmask; + break; + + case GPIO_PULL_NO_CHANGE: + break; + + default: + BUG(); + break; + + } + break; + + case GPIO_IS_OUTPUT: + /* GPIO is set to output */ + dirs_register |= bitmask; + + /* + * Since its output there should not + * be a need to disable PULL UP/DOWN + * but better safe than sorry. + */ + pdis_register_disable |= bitmask; + /* Next we check for setting GPIO HIGH/LOW */ + switch (PIN_SLPM_VAL(cfgs[i])) { + case GPIO_IS_OUTPUT_LOW: + /* GPIO is set to LOW */ + datc_register |= bitmask; + break; + + case GPIO_IS_OUTPUT_HIGH: + /* GPIO is set to high */ + dats_register |= bitmask; + break; + + case GPIO_IS_NO_CHANGE: + break; + + default: + BUG(); + break; + } + + break; + case GPIO_IS_NOT_CHANGED: + break; + + default: + BUG(); + break; + } + + /* Next check for Sleep Power Managment (SLPM) */ + switch (PIN_SLPM(cfgs[i])) { + case GPIO_WAKEUP_IS_ENABLED: + slpm_register_enabled |= bitmask; + break; + + case GPIO_WAKEUP_IS_DISBLED: + slpm_register_disabled |= bitmask; + break; + + default: + BUG(); + break; + } + + /* Next check for Sleep Power Managment (SLPM) */ + switch (PIN_SLPM_PDIS(cfgs[i])) { + case GPIO_PDIS_NO_CHANGE: + break; + + case GPIO_PDIS_DISABLED: + pdis_register_disable |= bitmask; + break; + + case GPIO_PDIS_ENABLED: + pdis_register_enabled |= bitmask; + break; + + default: + BUG(); + break; + } + + } + + /* Write the register settings GPIO direction */ + writel(dirs_register & ~w_imsc, bankaddr + NMK_GPIO_DIRS); + writel(dirc_register, bankaddr + NMK_GPIO_DIRC); + + writel(datc_register & ~w_imsc, bankaddr + NMK_GPIO_DATC); + writel(dats_register & ~w_imsc, bankaddr + NMK_GPIO_DATS); + + /* Write the PDIS enable/disable */ + writel(readl(bankaddr + NMK_GPIO_PDIS) + | (pdis_register_disable & ~w_imsc & ~imsc), + bankaddr + NMK_GPIO_PDIS); + writel(readl(bankaddr + NMK_GPIO_PDIS) + & (~pdis_register_enabled & ~w_imsc & ~imsc), + bankaddr + NMK_GPIO_PDIS); + + /* Write the SLPM enable/disable */ + writel(readl(bankaddr + NMK_GPIO_SLPC) | slpm_register_disabled, + bankaddr + NMK_GPIO_SLPC); + writel(readl(bankaddr + NMK_GPIO_SLPC) & ~slpm_register_enabled, + bankaddr + NMK_GPIO_SLPC); +} + +void sleep_pins_config_pm_mux(pin_cfg_t *cfgs, int num) +{ + int i = 0; + int gpio = 0; + u32 offset; + u32 bitmask = 1; + u32 gpio_afsla_register_set = 0; + u32 gpio_afslb_register_set = 0; + u32 gpio_afsla_register_clear = 0; + u32 gpio_afslb_register_clear = 0; + u32 bankaddr = 0; + + gpio = PIN_NUM(cfgs[i]); + + /* Get the bank number the pin is mapped to */ + bankaddr = IO_ADDRESS(u8500_gpio_banks[(gpio >> GPIO_BLOCK_SHIFT)]); + + for (i = 0; i < num; i++) { + /* Get the pin number */ + gpio = PIN_NUM(cfgs[i]); + + /* get the offset into the register */ + offset = gpio % NMK_GPIO_PER_CHIP; + /* Set the bit to toggle */ + bitmask = 1 << offset ; + + /* First check for ALT pin configuration */ + switch (PIN_ALT(cfgs[i])) { + case NMK_GPIO_ALT_GPIO: + /* Set bit to configured as GPIO */ + gpio_afsla_register_clear |= bitmask; + gpio_afslb_register_clear |= bitmask; + break; + + case NMK_GPIO_ALT_A: + /* ALT A setting so set corresponding bit */ + gpio_afsla_register_set |= bitmask; + break; + + case NMK_GPIO_ALT_B: + /* ALT B setting so set corresponding bit */ + gpio_afslb_register_set |= bitmask; + break; + + case NMK_GPIO_ALT_C: + /* ALT C setting so set corresponding bits */ + gpio_afsla_register_set |= bitmask; + gpio_afslb_register_set |= bitmask; + break; + + default: + BUG(); + break; + } + } + /* Set bits that configures GPIO */ + writel(readl(bankaddr + NMK_GPIO_AFSLA) + & ~gpio_afsla_register_clear, bankaddr + NMK_GPIO_AFSLA); + writel(readl(bankaddr + NMK_GPIO_AFSLB) + & ~gpio_afslb_register_clear, bankaddr + NMK_GPIO_AFSLB); + + /* Set bits that configures ALT_X */ + writel(readl(bankaddr + NMK_GPIO_AFSLA) + | gpio_afsla_register_set, bankaddr + NMK_GPIO_AFSLA); + writel(readl(bankaddr + NMK_GPIO_AFSLB) + | gpio_afslb_register_set, bankaddr + NMK_GPIO_AFSLB); +} |