armv7: Add support for ST-Ericsson U8500 href platform

Minimal platform support to boot linux from SD.

Supported devices/hw limited to external MMC/SD slot,
GPIO, I2C and minimal PRCMU.

Signed-off-by: John Rigby <john.rigby@linaro.org>
CC: Albert Aribaud <albert.aribaud@free.fr>

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 0000000..96b2461
--- /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);
+}