diff options
Diffstat (limited to 'board/st-ericsson/u8500/gpio.c')
| -rw-r--r-- | board/st-ericsson/u8500/gpio.c | 347 |
1 files changed, 347 insertions, 0 deletions
diff --git a/board/st-ericsson/u8500/gpio.c b/board/st-ericsson/u8500/gpio.c new file mode 100644 index 0000000000..96b2461b9c --- /dev/null +++ b/board/st-ericsson/u8500/gpio.c @@ -0,0 +1,347 @@ +/* + * Copyright (C) ST-Ericsson SA 2009 + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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; either version 2 of + * the License, or (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/arch/gpio.h> + +static struct gpio_register *addr_gpio_register[] = { + (void *)U8500_GPIO_0_BASE, + (void *)U8500_GPIO_1_BASE, + (void *)U8500_GPIO_2_BASE, + (void *)U8500_GPIO_3_BASE, + (void *)U8500_GPIO_4_BASE, + (void *)U8500_GPIO_5_BASE, + (void *)U8500_GPIO_6_BASE, + (void *)U8500_GPIO_7_BASE, + (void *)U8500_GPIO_8_BASE, +}; + +struct gpio_altfun_data altfun_table[] = { + { + .altfun = GPIO_ALT_I2C_0, + .start = 147, + .end = 148, + .cont = 0, + .type = GPIO_ALTF_A, + }, + { + .altfun = GPIO_ALT_I2C_1, + .start = 16, + .end = 17, + .cont = 0, + .type = GPIO_ALTF_B, + }, + { + .altfun = GPIO_ALT_I2C_2, + .start = 10, + .end = 11, + .cont = 0, + .type = GPIO_ALTF_B, + }, + { + .altfun = GPIO_ALT_I2C_3, + .start = 229, + .end = 230, + .cont = 0, + .type = GPIO_ALTF_C, + }, + { + .altfun = GPIO_ALT_UART_0_MODEM, + .start = 0, + .end = 3, + .cont = 1, + .type = GPIO_ALTF_A, + }, + { + .altfun = GPIO_ALT_UART_0_MODEM, + .start = 33, + .end = 36, + .cont = 0, + .type = GPIO_ALTF_C, + }, + { + .altfun = GPIO_ALT_UART_1, + .start = 4, + .end = 7, + .cont = 0, + .type = + GPIO_ALTF_A, + }, + { + .altfun = GPIO_ALT_UART_2, + .start = 18, + .end = 19, + .cont = 1, + .type = GPIO_ALTF_B, + }, + { + .altfun = GPIO_ALT_UART_2, + .start = 29, + .end = 32, + .cont = 0, + .type = GPIO_ALTF_C, + }, + { + .altfun = GPIO_ALT_MSP_0, + .start = 12, + .end = 17, + .cont = 1, + .type = GPIO_ALTF_A, + }, + { + .altfun = GPIO_ALT_MSP_0, + .start = 21, + .end = 21, + .cont = 0, + .type = GPIO_ALTF_B, + }, + { + .altfun = GPIO_ALT_MSP_1, + .start = 33, + .end = 36, + .cont = 0, + .type = GPIO_ALTF_A, + }, + { + .altfun = GPIO_ALT_MSP_2, + .start = 192, + .end = 196, + .cont = 0, + .type = GPIO_ALTF_A, + }, + { + .altfun = GPIO_ALT_LCD_PANEL, + .start = 64, + .end = 93, + .cont = 1, + .type = GPIO_ALTF_A, + }, + { + .altfun = GPIO_ALT_LCD_PANEL, + .start = 150, + .end = 171, + .cont = 0, + .type = GPIO_ALTF_B, + }, + { + .altfun = GPIO_ALT_SD_CARD0, + .start = 18, + .end = 28, + .cont = 0, + .type = GPIO_ALTF_A, + }, + { + .altfun = GPIO_ALT_MM_CARD0, + .start = 18, + .end = 32, + .cont = 0, + .type = GPIO_ALTF_A, + }, + { + .altfun = GPIO_ALT_USB_OTG, + .start = 256, + .end = 267, + .cont = 0, + .type = GPIO_ALTF_A, + }, + { + .altfun = GPIO_ALT_EMMC, + .start = 197, + .end = 207, + .cont = 0, + .type = GPIO_ALTF_A, + }, + { + .altfun = GPIO_ALT_POP_EMMC, + .start = 128, + .end = 138, + .cont = 0, + .type = GPIO_ALTF_A, + }, +}; + +/* + * Static Function declarations + */ +enum gpio_error gpio_setpinconfig(int pin_id, struct gpio_config *config) +{ + struct gpio_register *p_gpio_register = + addr_gpio_register[GPIO_BLOCK(pin_id)]; + u32 mask = 1UL << (pin_id % GPIO_PINS_PER_BLOCK); + enum gpio_error error = GPIO_OK; + u32 temp_reg; + + switch (config->mode) { + case GPIO_ALTF_A: + temp_reg = readl(&p_gpio_register->gpio_afsa); + temp_reg |= mask; + writel(temp_reg, &p_gpio_register->gpio_afsa); + temp_reg = readl(&p_gpio_register->gpio_afsb); + temp_reg &= ~mask; + writel(temp_reg, &p_gpio_register->gpio_afsb); + break; + case GPIO_ALTF_B: + temp_reg = readl(&p_gpio_register->gpio_afsa); + temp_reg &= ~mask; + writel(temp_reg, &p_gpio_register->gpio_afsa); + temp_reg = readl(&p_gpio_register->gpio_afsb); + temp_reg |= mask; + writel(temp_reg, &p_gpio_register->gpio_afsb); + break; + case GPIO_ALTF_C: + temp_reg = readl(&p_gpio_register->gpio_afsa); + temp_reg |= mask; + writel(temp_reg, &p_gpio_register->gpio_afsa); + temp_reg = readl(&p_gpio_register->gpio_afsb); + temp_reg |= mask; + writel(temp_reg, &p_gpio_register->gpio_afsb); + break; + case GPIO_MODE_SOFTWARE: + temp_reg = readl(&p_gpio_register->gpio_afsa); + temp_reg &= ~mask; + writel(temp_reg, &p_gpio_register->gpio_afsa); + temp_reg = readl(&p_gpio_register->gpio_afsb); + temp_reg &= ~mask; + writel(temp_reg, &p_gpio_register->gpio_afsb); + + switch (config->direction) { + case GPIO_DIR_INPUT: + writel(mask, &p_gpio_register->gpio_dirc); + break; + case GPIO_DIR_OUTPUT: + writel(mask, &p_gpio_register->gpio_dirs); + break; + case GPIO_DIR_LEAVE_UNCHANGED: + break; + default: + return GPIO_INVALID_PARAMETER; + } + + break; + case GPIO_MODE_LEAVE_UNCHANGED: + break; + default: + return GPIO_INVALID_PARAMETER; + } + return error; +} + +enum gpio_error gpio_resetgpiopin(int pin_id, char *dev_name) +{ + struct gpio_register *p_gpio_register = + addr_gpio_register[GPIO_BLOCK(pin_id)]; + u32 mask = 1UL << (pin_id % GPIO_PINS_PER_BLOCK); + enum gpio_error error = GPIO_OK; + u32 temp_reg; + + temp_reg = readl(&p_gpio_register->gpio_afsa); + temp_reg &= ~mask; + writel(temp_reg, &p_gpio_register->gpio_afsa); + temp_reg = readl(&p_gpio_register->gpio_afsb); + temp_reg &= ~mask; + writel(temp_reg, &p_gpio_register->gpio_afsb); + writel(mask, &p_gpio_register->gpio_dirc); + + return error; +} + +struct gpio_config altfun_pinconfig; +enum gpio_error gpio_altfunction(enum gpio_alt_function alt_func, + int which_altfunc, char *dev_name) +{ + int i, j, start, end; + enum gpio_error error = -1; + + for (i = 0; i < ARRAY_SIZE(altfun_table); i++) { + if (altfun_table[i].altfun != alt_func) + continue; + + start = altfun_table[i].start; + end = altfun_table[i].end; + for (j = start; j <= end; j++) { + if (which_altfunc == GPIO_ALTF_FIND) + altfun_pinconfig.mode = altfun_table[i].type; + else + altfun_pinconfig.mode = which_altfunc; + altfun_pinconfig.direction = GPIO_DIR_OUTPUT; + altfun_pinconfig.dev_name = dev_name; + + if (which_altfunc != GPIO_ALTF_DISABLE) + error = gpio_setpinconfig(j, &altfun_pinconfig); + else + error = gpio_resetgpiopin(j, dev_name); + if (!error) + continue; + printf("GPIO %d configuration failure (nmdk_error:%d)", + j, error); + error = GPIO_INVALID_PARAMETER; + return error; + } + + if (!altfun_table[i].cont) + break; + } + return error; +} + +int gpio_writepin(int pin_id, enum gpio_data value, char *dev_name) +{ + struct gpio_register *p_gpio_register = + addr_gpio_register[GPIO_BLOCK(pin_id)]; + u32 mask = 1UL << (pin_id % GPIO_PINS_PER_BLOCK); + + switch (value) { + case GPIO_DATA_HIGH: + writel(mask, &p_gpio_register->gpio_dats); + break; + case GPIO_DATA_LOW: + writel(mask, &p_gpio_register->gpio_datc); + break; + default: + printf("Invalid value passed in %s", __FUNCTION__); + return GPIO_INVALID_PARAMETER; + } + return GPIO_OK; +} + +int gpio_readpin(int pin_id, enum gpio_data *rv) +{ + struct gpio_register *p_gpio_register = + addr_gpio_register[GPIO_BLOCK(pin_id)]; + u32 mask = 1UL << (pin_id % GPIO_PINS_PER_BLOCK); + + if ((readl(&p_gpio_register->gpio_dat) & mask) != 0) + *rv = GPIO_DATA_HIGH; + else + *rv = GPIO_DATA_LOW; + return GPIO_OK; +} + +int gpio_altfuncenable(enum gpio_alt_function altfunc, char *dev_name) +{ + return (int)gpio_altfunction(altfunc, GPIO_ALTF_FIND, dev_name); +} + +int gpio_altfuncdisable(enum gpio_alt_function altfunc, char *dev_name) +{ + return (int)gpio_altfunction(altfunc, GPIO_ALTF_DISABLE, dev_name); +} |