diff options
author | Taniya Das <tdas@codeaurora.org> | 2019-08-07 11:34:57 +0530 |
---|---|---|
committer | Julius Werner <jwerner@chromium.org> | 2019-11-01 01:16:19 +0000 |
commit | 09c3bfe826cf8ff30bab9ee073474674f1c9d565 (patch) | |
tree | 3f8b89fefd0b38198f03f6eb9cfc21ed3e30cac7 /src/soc/qualcomm/sc7180/gpio.c | |
parent | 2e37fdddd5f859b82923485612ec869325f149fc (diff) |
sc7180: Add gpio driver
Add support for gpio driver for SC7180
Developer/Reviewer, be aware of this patch from Napali:
https://review.coreboot.org/c/coreboot/+/30003/25
https://review.coreboot.org/c/coreboot/+/31083/15
Change-Id: I12bdbeb97765b6ae1e015ca35108008bf82801cc
Signed-off-by: Taniya Das <tdas@codeaurora.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35497
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Diffstat (limited to 'src/soc/qualcomm/sc7180/gpio.c')
-rw-r--r-- | src/soc/qualcomm/sc7180/gpio.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/src/soc/qualcomm/sc7180/gpio.c b/src/soc/qualcomm/sc7180/gpio.c new file mode 100644 index 0000000000..9f3b722e31 --- /dev/null +++ b/src/soc/qualcomm/sc7180/gpio.c @@ -0,0 +1,105 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2019 Qualcomm Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <arch/mmio.h> +#include <assert.h> +#include <delay.h> +#include <timer.h> +#include <timestamp.h> +#include <types.h> + +#include <gpio.h> + +void gpio_configure(gpio_t gpio, uint32_t func, uint32_t pull, + uint32_t drive_str, uint32_t enable) +{ + uint32_t reg_val; + struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr; + + /* gpio pull only PULLNONE, PULLUP, KEEPER, PULLDOWN status */ + assert(pull <= GPIO_PULL_UP); + + reg_val = ((enable & GPIO_CFG_OE_BMSK) << GPIO_CFG_OE_SHFT) | + ((drive_str & GPIO_CFG_DRV_BMSK) << GPIO_CFG_DRV_SHFT) | + ((func & GPIO_CFG_FUNC_BMSK) << GPIO_CFG_FUNC_SHFT) | + ((pull & GPIO_CFG_PULL_BMSK) << GPIO_CFG_PULL_SHFT); + + write32(®s->cfg, reg_val); +} + +void gpio_set(gpio_t gpio, int value) +{ + struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr; + + write32(®s->in_out, (!!value) << GPIO_IO_OUT_SHFT); +} + +int gpio_get(gpio_t gpio) +{ + struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr; + + return ((read32(®s->in_out) >> GPIO_IO_IN_SHFT) & + GPIO_IO_IN_BMSK); +} + +void gpio_input_pulldown(gpio_t gpio) +{ + gpio_configure(gpio, GPIO_FUNC_GPIO, + GPIO_PULL_DOWN, GPIO_2MA, GPIO_OUTPUT_DISABLE); +} + +void gpio_input_pullup(gpio_t gpio) +{ + gpio_configure(gpio, GPIO_FUNC_GPIO, + GPIO_PULL_UP, GPIO_2MA, GPIO_OUTPUT_DISABLE); +} + +void gpio_input(gpio_t gpio) +{ + gpio_configure(gpio, GPIO_FUNC_GPIO, + GPIO_NO_PULL, GPIO_2MA, GPIO_OUTPUT_DISABLE); +} + +void gpio_output(gpio_t gpio, int value) +{ + gpio_set(gpio, value); + gpio_configure(gpio, GPIO_FUNC_GPIO, + GPIO_NO_PULL, GPIO_2MA, GPIO_OUTPUT_ENABLE); +} + +void gpio_input_irq(gpio_t gpio, enum gpio_irq_type type, uint32_t pull) +{ + struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr; + + gpio_configure(gpio, GPIO_FUNC_GPIO, + pull, GPIO_2MA, GPIO_OUTPUT_DISABLE); + + clrsetbits_le32(®s->intr_cfg, GPIO_INTR_DECT_CTL_MASK << + GPIO_INTR_DECT_CTL_SHIFT, type << GPIO_INTR_DECT_CTL_SHIFT); + clrsetbits_le32(®s->intr_cfg, GPIO_INTR_RAW_STATUS_ENABLE + << GPIO_INTR_RAW_STATUS_EN_SHIFT, GPIO_INTR_RAW_STATUS_ENABLE + << GPIO_INTR_RAW_STATUS_EN_SHIFT); +} + +int gpio_irq_status(gpio_t gpio) +{ + struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr; + + if (!(read32(®s->intr_status) & GPIO_INTR_STATUS_MASK)) + return 0; + + write32(®s->intr_status, GPIO_INTR_STATUS_DISABLE); + return 1; +} |