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gpio: stm32: add stm32f1 support

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Add support for the STM32F1 family to the STM32 gpio driver.

Signed-off-by: Matt Porter <mporter@konsulko.com>
This commit is contained in:
Matt Porter 2015-05-05 15:00:25 -04:00 committed by Tom Rini
parent 2d18ef2364
commit 0144caf22c
1 changed files with 109 additions and 1 deletions
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110
drivers/gpio/stm32_gpio.c
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@ -5,6 +5,9 @@
* (C) Copyright 2015
* Kamil Lulko, <rev13@wp.pl>
*
* Copyright 2015 ATS Advanced Telematics Systems GmbH
* Copyright 2015 Konsulko Group, Matt Porter <mporter@konsulko.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
@ -16,6 +19,7 @@
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_STM32F4)
#define STM32_GPIOA_BASE (STM32_AHB1PERIPH_BASE + 0x0000)
#define STM32_GPIOB_BASE (STM32_AHB1PERIPH_BASE + 0x0400)
#define STM32_GPIOC_BASE (STM32_AHB1PERIPH_BASE + 0x0800)
@ -82,6 +86,92 @@ int stm32_gpio_config(const struct stm32_gpio_dsc *dsc,
out:
return rv;
}
#elif defined(CONFIG_STM32F1)
#define STM32_GPIOA_BASE (STM32_APB2PERIPH_BASE + 0x0800)
#define STM32_GPIOB_BASE (STM32_APB2PERIPH_BASE + 0x0C00)
#define STM32_GPIOC_BASE (STM32_APB2PERIPH_BASE + 0x1000)
#define STM32_GPIOD_BASE (STM32_APB2PERIPH_BASE + 0x1400)
#define STM32_GPIOE_BASE (STM32_APB2PERIPH_BASE + 0x1800)
#define STM32_GPIOF_BASE (STM32_APB2PERIPH_BASE + 0x1C00)
#define STM32_GPIOG_BASE (STM32_APB2PERIPH_BASE + 0x2000)
static const unsigned long io_base[] = {
STM32_GPIOA_BASE, STM32_GPIOB_BASE, STM32_GPIOC_BASE,
STM32_GPIOD_BASE, STM32_GPIOE_BASE, STM32_GPIOF_BASE,
STM32_GPIOG_BASE
};
#define STM32_GPIO_CR_MODE_MASK 0x3
#define STM32_GPIO_CR_MODE_SHIFT(p) (p * 4)
#define STM32_GPIO_CR_CNF_MASK 0x3
#define STM32_GPIO_CR_CNF_SHIFT(p) (p * 4 + 2)
struct stm32_gpio_regs {
u32 crl; /* GPIO port configuration low */
u32 crh; /* GPIO port configuration high */
u32 idr; /* GPIO port input data */
u32 odr; /* GPIO port output data */
u32 bsrr; /* GPIO port bit set/reset */
u32 brr; /* GPIO port bit reset */
u32 lckr; /* GPIO port configuration lock */
};
#define CHECK_DSC(x) (!x || x->port > 6 || x->pin > 15)
#define CHECK_CTL(x) (!x || x->mode > 3 || x->icnf > 3 || x->ocnf > 3 || \
x->pupd > 1)
int stm32_gpio_config(const struct stm32_gpio_dsc *dsc,
const struct stm32_gpio_ctl *ctl)
{
struct stm32_gpio_regs *gpio_regs;
u32 *cr;
int p, crp;
int rv;
if (CHECK_DSC(dsc)) {
rv = -EINVAL;
goto out;
}
if (CHECK_CTL(ctl)) {
rv = -EINVAL;
goto out;
}
p = dsc->pin;
gpio_regs = (struct stm32_gpio_regs *)io_base[dsc->port];
/* Enable clock for GPIO port */
setbits_le32(&STM32_RCC->apb2enr, 0x04 << dsc->port);
if (p < 8) {
cr = &gpio_regs->crl;
crp = p;
} else {
cr = &gpio_regs->crh;
crp = p - 8;
}
clrbits_le32(cr, 0x3 << STM32_GPIO_CR_MODE_SHIFT(crp));
setbits_le32(cr, ctl->mode << STM32_GPIO_CR_MODE_SHIFT(crp));
clrbits_le32(cr, 0x3 << STM32_GPIO_CR_CNF_SHIFT(crp));
/* Inputs set the optional pull up / pull down */
if (ctl->mode == STM32_GPIO_MODE_IN) {
setbits_le32(cr, ctl->icnf << STM32_GPIO_CR_CNF_SHIFT(crp));
clrbits_le32(&gpio_regs->odr, 0x1 << p);
setbits_le32(&gpio_regs->odr, ctl->pupd << p);
} else {
setbits_le32(cr, ctl->ocnf << STM32_GPIO_CR_CNF_SHIFT(crp));
}
rv = 0;
out:
return rv;
}
#else
#error STM32 family not supported
#endif
int stm32_gpout_set(const struct stm32_gpio_dsc *dsc, int state)
{
@ -140,10 +230,20 @@ int gpio_direction_input(unsigned gpio)
dsc.port = stm32_gpio_to_port(gpio);
dsc.pin = stm32_gpio_to_pin(gpio);
#if defined(CONFIG_STM32F4)
ctl.af = STM32_GPIO_AF0;
ctl.mode = STM32_GPIO_MODE_IN;
ctl.otype = STM32_GPIO_OTYPE_PP;
ctl.pupd = STM32_GPIO_PUPD_NO;
ctl.speed = STM32_GPIO_SPEED_50M;
#elif defined(CONFIG_STM32F1)
ctl.mode = STM32_GPIO_MODE_IN;
ctl.icnf = STM32_GPIO_ICNF_IN_FLT;
ctl.ocnf = STM32_GPIO_OCNF_GP_PP; /* ignored for input */
ctl.pupd = STM32_GPIO_PUPD_UP; /* ignored for floating */
#else
#error STM32 family not supported
#endif
return stm32_gpio_config(&dsc, &ctl);
}
@ -156,11 +256,19 @@ int gpio_direction_output(unsigned gpio, int value)
dsc.port = stm32_gpio_to_port(gpio);
dsc.pin = stm32_gpio_to_pin(gpio);
#if defined(CONFIG_STM32F4)
ctl.af = STM32_GPIO_AF0;
ctl.mode = STM32_GPIO_MODE_OUT;
ctl.otype = STM32_GPIO_OTYPE_PP;
ctl.pupd = STM32_GPIO_PUPD_NO;
ctl.speed = STM32_GPIO_SPEED_50M;
#elif defined(CONFIG_STM32F1)
ctl.mode = STM32_GPIO_MODE_OUT_50M;
ctl.ocnf = STM32_GPIO_OCNF_GP_PP;
ctl.icnf = STM32_GPIO_ICNF_IN_FLT; /* ignored for output */
ctl.pupd = STM32_GPIO_PUPD_UP; /* ignored for output */
#else
#error STM32 family not supported
#endif
res = stm32_gpio_config(&dsc, &ctl);
if (res < 0)