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Diffstat (limited to 'src/cpu/samsung/exynos5250/gpio.c')
-rw-r--r--src/cpu/samsung/exynos5250/gpio.c279
1 files changed, 0 insertions, 279 deletions
diff --git a/src/cpu/samsung/exynos5250/gpio.c b/src/cpu/samsung/exynos5250/gpio.c
deleted file mode 100644
index 2a93328a70..0000000000
--- a/src/cpu/samsung/exynos5250/gpio.c
+++ /dev/null
@@ -1,279 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2009 Samsung Electronics
- *
- * 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.
- *
- * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <console/console.h>
-#include <string.h>
-#include <delay.h>
-#include <assert.h>
-#include "gpio.h"
-#include "cpu.h"
-
-#define CON_MASK(x) (0xf << ((x) << 2))
-#define CON_SFR(x, v) ((v) << ((x) << 2))
-
-#define DAT_MASK(x) (0x1 << (x))
-#define DAT_SET(x) (0x1 << (x))
-
-#define PULL_MASK(x) (0x3 << ((x) << 1))
-#define PULL_MODE(x, v) ((v) << ((x) << 1))
-
-#define DRV_MASK(x) (0x3 << ((x) << 1))
-#define DRV_SET(x, m) ((m) << ((x) << 1))
-#define RATE_MASK(x) (0x1 << (x + 16))
-#define RATE_SET(x) (0x1 << (x + 16))
-
-struct gpio_info {
- unsigned int reg_addr; /* Address of register for this part */
- unsigned int max_gpio; /* Maximum GPIO in this part */
-};
-
-static const struct gpio_info gpio_data[EXYNOS_GPIO_NUM_PARTS] = {
- { EXYNOS5_GPIO_PART1_BASE, GPIO_MAX_PORT_PART_1 },
- { EXYNOS5_GPIO_PART2_BASE, GPIO_MAX_PORT_PART_2 },
- { EXYNOS5_GPIO_PART3_BASE, GPIO_MAX_PORT_PART_3 },
- { EXYNOS5_GPIO_PART4_BASE, GPIO_MAX_PORT_PART_4 },
- { EXYNOS5_GPIO_PART5_BASE, GPIO_MAX_PORT_PART_5 },
- { EXYNOS5_GPIO_PART6_BASE, GPIO_MAX_PORT },
-};
-
-/* This macro gets gpio pin offset from 0..7 */
-#define GPIO_BIT(x) ((x) & 0x7)
-
-static struct gpio_bank *gpio_get_bank(unsigned int gpio)
-{
- const struct gpio_info *data;
- unsigned int upto;
- int i;
-
- for (i = upto = 0, data = gpio_data; i < EXYNOS_GPIO_NUM_PARTS;
- i++, upto = data->max_gpio, data++) {
- if (gpio < data->max_gpio) {
- struct gpio_bank *bank;
-
- bank = (struct gpio_bank *)data->reg_addr;
- bank += (gpio - upto) / GPIO_PER_BANK;
- return bank;
- }
- }
-
- ASSERT(gpio < GPIO_MAX_PORT); /* ...which it will not be */
- return NULL;
-}
-
-/* Common GPIO API - only available on Exynos5 */
-void gpio_cfg_pin(int gpio, int cfg)
-{
- unsigned int value;
- struct gpio_bank *bank = gpio_get_bank(gpio);
-
- value = readl(&bank->con);
- value &= ~CON_MASK(GPIO_BIT(gpio));
- value |= CON_SFR(GPIO_BIT(gpio), cfg);
- writel(value, &bank->con);
-}
-
-static int gpio_get_cfg(int gpio)
-{
- struct gpio_bank *bank = gpio_get_bank(gpio);
- int shift = GPIO_BIT(gpio) << 2;
-
- return (readl(&bank->con) & CON_MASK(GPIO_BIT(gpio))) >> shift;
-}
-
-void gpio_set_pull(int gpio, int mode)
-{
- unsigned int value;
- struct gpio_bank *bank = gpio_get_bank(gpio);
-
- value = readl(&bank->pull);
- value &= ~PULL_MASK(GPIO_BIT(gpio));
-
- switch (mode) {
- case GPIO_PULL_DOWN:
- case GPIO_PULL_UP:
- value |= PULL_MODE(GPIO_BIT(gpio), mode);
- break;
- default:
- break;
- }
-
- writel(value, &bank->pull);
-}
-
-void gpio_set_drv(int gpio, int mode)
-{
- unsigned int value;
- struct gpio_bank *bank = gpio_get_bank(gpio);
-
- value = readl(&bank->drv);
- value &= ~DRV_MASK(GPIO_BIT(gpio));
-
- switch (mode) {
- case GPIO_DRV_1X:
- case GPIO_DRV_2X:
- case GPIO_DRV_3X:
- case GPIO_DRV_4X:
- value |= DRV_SET(GPIO_BIT(gpio), mode);
- break;
- default:
- return;
- }
-
- writel(value, &bank->drv);
-}
-
-void gpio_set_rate(int gpio, int mode)
-{
- unsigned int value;
- struct gpio_bank *bank = gpio_get_bank(gpio);
-
- value = readl(&bank->drv);
- value &= ~RATE_MASK(GPIO_BIT(gpio));
-
- switch (mode) {
- case GPIO_DRV_FAST:
- case GPIO_DRV_SLOW:
- value |= RATE_SET(GPIO_BIT(gpio));
- break;
- default:
- return;
- }
-
- writel(value, &bank->drv);
-}
-
-int gpio_direction_input(unsigned gpio)
-{
- gpio_cfg_pin(gpio, GPIO_INPUT);
-
- return 0;
-}
-
-int gpio_direction_output(unsigned gpio, int value)
-{
- unsigned int val;
- struct gpio_bank *bank = gpio_get_bank(gpio);
-
- val = readl(&bank->dat);
- val &= ~DAT_MASK(GPIO_BIT(gpio));
- if (value)
- val |= DAT_SET(GPIO_BIT(gpio));
- writel(val, &bank->dat);
-
- gpio_cfg_pin(gpio, GPIO_OUTPUT);
-
- return 0;
-}
-
-int gpio_get_value(unsigned gpio)
-{
- unsigned int value;
- struct gpio_bank *bank = gpio_get_bank(gpio);
-
- value = readl(&bank->dat);
- return !!(value & DAT_MASK(GPIO_BIT(gpio)));
-}
-
-int gpio_set_value(unsigned gpio, int value)
-{
- unsigned int val;
- struct gpio_bank *bank = gpio_get_bank(gpio);
-
- val = readl(&bank->dat);
- val &= ~DAT_MASK(GPIO_BIT(gpio));
- if (value)
- val |= DAT_SET(GPIO_BIT(gpio));
- writel(val, &bank->dat);
-
- return 0;
-}
-
-/*
- * Add a delay here to give the lines time to settle
- * TODO(sjg): 1us does not always work, 2 is stable, so use 5 to be safe
- * Come back to this and sort out what the datasheet says
- */
-#define GPIO_DELAY_US 5
-
-#ifndef __BOOT_BLOCK__
-/*
- * FIXME(dhendrix): These functions use udelay, which has dependencies on
- * pwm code and timer code. These aren't necessary for the bootblock and
- * bloat the image significantly.
- */
-int gpio_read_mvl3(unsigned gpio)
-{
- int high, low;
- enum mvl3 value;
-
- if (gpio >= GPIO_MAX_PORT)
- return -1;
-
- gpio_direction_input(gpio);
- gpio_set_pull(gpio, GPIO_PULL_UP);
- udelay(GPIO_DELAY_US);
- high = gpio_get_value(gpio);
- gpio_set_pull(gpio, GPIO_PULL_DOWN);
- udelay(GPIO_DELAY_US);
- low = gpio_get_value(gpio);
-
- if (high && low) /* external pullup */
- value = LOGIC_1;
- else if (!high && !low) /* external pulldown */
- value = LOGIC_0;
- else /* floating */
- value = LOGIC_Z;
-
- /*
- * Check if line is externally pulled high and
- * configure the internal pullup to match. For
- * floating and pulldowns, the GPIO is already
- * configured with an internal pulldown from the
- * above test.
- */
- if (value == LOGIC_1)
- gpio_set_pull(gpio, GPIO_PULL_UP);
-
- return value;
-}
-#endif /* __BOOT_BLOCK__ */
-
-/*
- * Display Exynos GPIO information
- */
-void gpio_info(void)
-{
- unsigned gpio;
-
- for (gpio = 0; gpio < GPIO_MAX_PORT; gpio++) {
- int cfg = gpio_get_cfg(gpio);
-
- printk(BIOS_INFO, "GPIO_%-3d: ", gpio);
- if (cfg == GPIO_INPUT)
- printk(BIOS_INFO, "input");
- else if (cfg == GPIO_OUTPUT)
- printk(BIOS_INFO, "output");
- else
- printk(BIOS_INFO, "func %d", cfg);
-
- if (cfg == GPIO_INPUT || cfg == GPIO_OUTPUT)
- printk(BIOS_INFO, ", value = %d", gpio_get_value(gpio));
- printk(BIOS_INFO, "\n");
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-06 11:11:11 +0000