upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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347 lines
7.5 KiB
347 lines
7.5 KiB
/*
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* Copyright (C) ST-Ericsson SA 2009
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/arch/gpio.h>
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static struct gpio_register *addr_gpio_register[] = {
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(void *)U8500_GPIO_0_BASE,
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(void *)U8500_GPIO_1_BASE,
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(void *)U8500_GPIO_2_BASE,
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(void *)U8500_GPIO_3_BASE,
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(void *)U8500_GPIO_4_BASE,
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(void *)U8500_GPIO_5_BASE,
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(void *)U8500_GPIO_6_BASE,
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(void *)U8500_GPIO_7_BASE,
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(void *)U8500_GPIO_8_BASE,
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};
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struct gpio_altfun_data altfun_table[] = {
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{
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.altfun = GPIO_ALT_I2C_0,
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.start = 147,
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.end = 148,
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.cont = 0,
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.type = GPIO_ALTF_A,
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},
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{
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.altfun = GPIO_ALT_I2C_1,
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.start = 16,
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.end = 17,
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.cont = 0,
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.type = GPIO_ALTF_B,
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},
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{
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.altfun = GPIO_ALT_I2C_2,
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.start = 10,
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.end = 11,
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.cont = 0,
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.type = GPIO_ALTF_B,
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},
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{
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.altfun = GPIO_ALT_I2C_3,
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.start = 229,
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.end = 230,
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.cont = 0,
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.type = GPIO_ALTF_C,
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},
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{
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.altfun = GPIO_ALT_UART_0_MODEM,
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.start = 0,
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.end = 3,
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.cont = 1,
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.type = GPIO_ALTF_A,
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},
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{
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.altfun = GPIO_ALT_UART_0_MODEM,
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.start = 33,
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.end = 36,
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.cont = 0,
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.type = GPIO_ALTF_C,
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},
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{
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.altfun = GPIO_ALT_UART_1,
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.start = 4,
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.end = 7,
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.cont = 0,
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.type =
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GPIO_ALTF_A,
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},
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{
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.altfun = GPIO_ALT_UART_2,
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.start = 18,
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.end = 19,
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.cont = 1,
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.type = GPIO_ALTF_B,
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},
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{
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.altfun = GPIO_ALT_UART_2,
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.start = 29,
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.end = 32,
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.cont = 0,
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.type = GPIO_ALTF_C,
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},
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{
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.altfun = GPIO_ALT_MSP_0,
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.start = 12,
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.end = 17,
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.cont = 1,
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.type = GPIO_ALTF_A,
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},
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{
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.altfun = GPIO_ALT_MSP_0,
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.start = 21,
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.end = 21,
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.cont = 0,
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.type = GPIO_ALTF_B,
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},
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{
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.altfun = GPIO_ALT_MSP_1,
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.start = 33,
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.end = 36,
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.cont = 0,
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.type = GPIO_ALTF_A,
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},
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{
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.altfun = GPIO_ALT_MSP_2,
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.start = 192,
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.end = 196,
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.cont = 0,
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.type = GPIO_ALTF_A,
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},
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{
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.altfun = GPIO_ALT_LCD_PANEL,
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.start = 64,
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.end = 93,
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.cont = 1,
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.type = GPIO_ALTF_A,
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},
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{
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.altfun = GPIO_ALT_LCD_PANEL,
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.start = 150,
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.end = 171,
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.cont = 0,
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.type = GPIO_ALTF_B,
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},
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{
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.altfun = GPIO_ALT_SD_CARD0,
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.start = 18,
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.end = 28,
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.cont = 0,
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.type = GPIO_ALTF_A,
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},
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{
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.altfun = GPIO_ALT_MM_CARD0,
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.start = 18,
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.end = 32,
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.cont = 0,
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.type = GPIO_ALTF_A,
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},
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{
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.altfun = GPIO_ALT_USB_OTG,
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.start = 256,
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.end = 267,
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.cont = 0,
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.type = GPIO_ALTF_A,
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},
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{
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.altfun = GPIO_ALT_EMMC,
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.start = 197,
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.end = 207,
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.cont = 0,
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.type = GPIO_ALTF_A,
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},
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{
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.altfun = GPIO_ALT_POP_EMMC,
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.start = 128,
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.end = 138,
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.cont = 0,
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.type = GPIO_ALTF_A,
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},
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};
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/*
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* Static Function declarations
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*/
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enum gpio_error gpio_setpinconfig(int pin_id, struct gpio_config *config)
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{
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struct gpio_register *p_gpio_register =
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addr_gpio_register[GPIO_BLOCK(pin_id)];
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u32 mask = 1UL << (pin_id % GPIO_PINS_PER_BLOCK);
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enum gpio_error error = GPIO_OK;
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u32 temp_reg;
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switch (config->mode) {
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case GPIO_ALTF_A:
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temp_reg = readl(&p_gpio_register->gpio_afsa);
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temp_reg |= mask;
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writel(temp_reg, &p_gpio_register->gpio_afsa);
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temp_reg = readl(&p_gpio_register->gpio_afsb);
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temp_reg &= ~mask;
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writel(temp_reg, &p_gpio_register->gpio_afsb);
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break;
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case GPIO_ALTF_B:
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temp_reg = readl(&p_gpio_register->gpio_afsa);
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temp_reg &= ~mask;
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writel(temp_reg, &p_gpio_register->gpio_afsa);
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temp_reg = readl(&p_gpio_register->gpio_afsb);
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temp_reg |= mask;
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writel(temp_reg, &p_gpio_register->gpio_afsb);
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break;
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case GPIO_ALTF_C:
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temp_reg = readl(&p_gpio_register->gpio_afsa);
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temp_reg |= mask;
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writel(temp_reg, &p_gpio_register->gpio_afsa);
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temp_reg = readl(&p_gpio_register->gpio_afsb);
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temp_reg |= mask;
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writel(temp_reg, &p_gpio_register->gpio_afsb);
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break;
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case GPIO_MODE_SOFTWARE:
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temp_reg = readl(&p_gpio_register->gpio_afsa);
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temp_reg &= ~mask;
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writel(temp_reg, &p_gpio_register->gpio_afsa);
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temp_reg = readl(&p_gpio_register->gpio_afsb);
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temp_reg &= ~mask;
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writel(temp_reg, &p_gpio_register->gpio_afsb);
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switch (config->direction) {
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case GPIO_DIR_INPUT:
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writel(mask, &p_gpio_register->gpio_dirc);
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break;
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case GPIO_DIR_OUTPUT:
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writel(mask, &p_gpio_register->gpio_dirs);
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break;
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case GPIO_DIR_LEAVE_UNCHANGED:
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break;
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default:
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return GPIO_INVALID_PARAMETER;
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}
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break;
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case GPIO_MODE_LEAVE_UNCHANGED:
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break;
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default:
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return GPIO_INVALID_PARAMETER;
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}
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return error;
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}
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enum gpio_error gpio_resetgpiopin(int pin_id, char *dev_name)
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{
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struct gpio_register *p_gpio_register =
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addr_gpio_register[GPIO_BLOCK(pin_id)];
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u32 mask = 1UL << (pin_id % GPIO_PINS_PER_BLOCK);
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enum gpio_error error = GPIO_OK;
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u32 temp_reg;
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temp_reg = readl(&p_gpio_register->gpio_afsa);
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temp_reg &= ~mask;
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writel(temp_reg, &p_gpio_register->gpio_afsa);
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temp_reg = readl(&p_gpio_register->gpio_afsb);
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temp_reg &= ~mask;
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writel(temp_reg, &p_gpio_register->gpio_afsb);
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writel(mask, &p_gpio_register->gpio_dirc);
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return error;
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}
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struct gpio_config altfun_pinconfig;
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enum gpio_error gpio_altfunction(enum gpio_alt_function alt_func,
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int which_altfunc, char *dev_name)
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{
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int i, j, start, end;
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enum gpio_error error = -1;
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for (i = 0; i < ARRAY_SIZE(altfun_table); i++) {
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if (altfun_table[i].altfun != alt_func)
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continue;
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start = altfun_table[i].start;
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end = altfun_table[i].end;
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for (j = start; j <= end; j++) {
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if (which_altfunc == GPIO_ALTF_FIND)
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altfun_pinconfig.mode = altfun_table[i].type;
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else
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altfun_pinconfig.mode = which_altfunc;
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altfun_pinconfig.direction = GPIO_DIR_OUTPUT;
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altfun_pinconfig.dev_name = dev_name;
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if (which_altfunc != GPIO_ALTF_DISABLE)
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error = gpio_setpinconfig(j, &altfun_pinconfig);
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else
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error = gpio_resetgpiopin(j, dev_name);
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if (!error)
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continue;
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printf("GPIO %d configuration failure (nmdk_error:%d)",
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j, error);
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error = GPIO_INVALID_PARAMETER;
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return error;
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}
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if (!altfun_table[i].cont)
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break;
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}
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return error;
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}
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int gpio_writepin(int pin_id, enum gpio_data value, char *dev_name)
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{
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struct gpio_register *p_gpio_register =
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addr_gpio_register[GPIO_BLOCK(pin_id)];
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u32 mask = 1UL << (pin_id % GPIO_PINS_PER_BLOCK);
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switch (value) {
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case GPIO_DATA_HIGH:
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writel(mask, &p_gpio_register->gpio_dats);
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break;
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case GPIO_DATA_LOW:
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writel(mask, &p_gpio_register->gpio_datc);
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break;
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default:
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printf("Invalid value passed in %s", __FUNCTION__);
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return GPIO_INVALID_PARAMETER;
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}
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return GPIO_OK;
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}
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int gpio_readpin(int pin_id, enum gpio_data *rv)
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{
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struct gpio_register *p_gpio_register =
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addr_gpio_register[GPIO_BLOCK(pin_id)];
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u32 mask = 1UL << (pin_id % GPIO_PINS_PER_BLOCK);
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if ((readl(&p_gpio_register->gpio_dat) & mask) != 0)
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*rv = GPIO_DATA_HIGH;
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else
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*rv = GPIO_DATA_LOW;
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return GPIO_OK;
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}
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int gpio_altfuncenable(enum gpio_alt_function altfunc, char *dev_name)
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{
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return (int)gpio_altfunction(altfunc, GPIO_ALTF_FIND, dev_name);
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}
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int gpio_altfuncdisable(enum gpio_alt_function altfunc, char *dev_name)
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{
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return (int)gpio_altfunction(altfunc, GPIO_ALTF_DISABLE, dev_name);
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}
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