sravan/system76-coreboot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

sc7180: Add gpio driver

Browse Source 
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>
This commit is contained in:
Taniya Das
2019-08-07 11:34:57 +05:30
committed by Julius Werner
parent 2e37fdddd5
commit 09c3bfe826
4 changed files with 392 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

105
src/soc/qualcomm/sc7180/gpio.c Normal file
View File

@@ -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(&regs->cfg, reg_val);
}
void gpio_set(gpio_t gpio, int value)
{
struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;
write32(&regs->in_out, (!!value) << GPIO_IO_OUT_SHFT);
}
int gpio_get(gpio_t gpio)
{
struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;
return ((read32(&regs->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(&regs->intr_cfg, GPIO_INTR_DECT_CTL_MASK <<
GPIO_INTR_DECT_CTL_SHIFT, type << GPIO_INTR_DECT_CTL_SHIFT);
clrsetbits_le32(&regs->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(&regs->intr_status) & GPIO_INTR_STATUS_MASK))
return 0;
write32(&regs->intr_status, GPIO_INTR_STATUS_DISABLE);
return 1;
}