summaryrefslogtreecommitdiff
path: root/arch/arm/mach-msm/gpio.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-msm/gpio.c')
-rw-r--r--arch/arm/mach-msm/gpio.c376
1 files changed, 0 insertions, 376 deletions
diff --git a/arch/arm/mach-msm/gpio.c b/arch/arm/mach-msm/gpio.c
deleted file mode 100644
index 5ea273b00da8..000000000000
--- a/arch/arm/mach-msm/gpio.c
+++ /dev/null
@@ -1,376 +0,0 @@
-/* linux/arch/arm/mach-msm/gpio.c
- *
- * Copyright (C) 2007 Google, Inc.
- * Copyright (c) 2009-2010, Code Aurora Forum. All rights reserved.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- */
-
-#include <linux/bitops.h>
-#include <linux/gpio.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/module.h>
-#include "gpio_hw.h"
-#include "gpiomux.h"
-
-#define FIRST_GPIO_IRQ MSM_GPIO_TO_INT(0)
-
-#define MSM_GPIO_BANK(bank, first, last) \
- { \
- .regs = { \
- .out = MSM_GPIO_OUT_##bank, \
- .in = MSM_GPIO_IN_##bank, \
- .int_status = MSM_GPIO_INT_STATUS_##bank, \
- .int_clear = MSM_GPIO_INT_CLEAR_##bank, \
- .int_en = MSM_GPIO_INT_EN_##bank, \
- .int_edge = MSM_GPIO_INT_EDGE_##bank, \
- .int_pos = MSM_GPIO_INT_POS_##bank, \
- .oe = MSM_GPIO_OE_##bank, \
- }, \
- .chip = { \
- .base = (first), \
- .ngpio = (last) - (first) + 1, \
- .get = msm_gpio_get, \
- .set = msm_gpio_set, \
- .direction_input = msm_gpio_direction_input, \
- .direction_output = msm_gpio_direction_output, \
- .to_irq = msm_gpio_to_irq, \
- .request = msm_gpio_request, \
- .free = msm_gpio_free, \
- } \
- }
-
-#define MSM_GPIO_BROKEN_INT_CLEAR 1
-
-struct msm_gpio_regs {
- void __iomem *out;
- void __iomem *in;
- void __iomem *int_status;
- void __iomem *int_clear;
- void __iomem *int_en;
- void __iomem *int_edge;
- void __iomem *int_pos;
- void __iomem *oe;
-};
-
-struct msm_gpio_chip {
- spinlock_t lock;
- struct gpio_chip chip;
- struct msm_gpio_regs regs;
-#if MSM_GPIO_BROKEN_INT_CLEAR
- unsigned int_status_copy;
-#endif
- unsigned int both_edge_detect;
- unsigned int int_enable[2]; /* 0: awake, 1: sleep */
-};
-
-static int msm_gpio_write(struct msm_gpio_chip *msm_chip,
- unsigned offset, unsigned on)
-{
- unsigned mask = BIT(offset);
- unsigned val;
-
- val = readl(msm_chip->regs.out);
- if (on)
- writel(val | mask, msm_chip->regs.out);
- else
- writel(val & ~mask, msm_chip->regs.out);
- return 0;
-}
-
-static void msm_gpio_update_both_edge_detect(struct msm_gpio_chip *msm_chip)
-{
- int loop_limit = 100;
- unsigned pol, val, val2, intstat;
- do {
- val = readl(msm_chip->regs.in);
- pol = readl(msm_chip->regs.int_pos);
- pol = (pol & ~msm_chip->both_edge_detect) |
- (~val & msm_chip->both_edge_detect);
- writel(pol, msm_chip->regs.int_pos);
- intstat = readl(msm_chip->regs.int_status);
- val2 = readl(msm_chip->regs.in);
- if (((val ^ val2) & msm_chip->both_edge_detect & ~intstat) == 0)
- return;
- } while (loop_limit-- > 0);
- printk(KERN_ERR "msm_gpio_update_both_edge_detect, "
- "failed to reach stable state %x != %x\n", val, val2);
-}
-
-static int msm_gpio_clear_detect_status(struct msm_gpio_chip *msm_chip,
- unsigned offset)
-{
- unsigned bit = BIT(offset);
-
-#if MSM_GPIO_BROKEN_INT_CLEAR
- /* Save interrupts that already triggered before we loose them. */
- /* Any interrupt that triggers between the read of int_status */
- /* and the write to int_clear will still be lost though. */
- msm_chip->int_status_copy |= readl(msm_chip->regs.int_status);
- msm_chip->int_status_copy &= ~bit;
-#endif
- writel(bit, msm_chip->regs.int_clear);
- msm_gpio_update_both_edge_detect(msm_chip);
- return 0;
-}
-
-static int msm_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-{
- struct msm_gpio_chip *msm_chip;
- unsigned long irq_flags;
-
- msm_chip = container_of(chip, struct msm_gpio_chip, chip);
- spin_lock_irqsave(&msm_chip->lock, irq_flags);
- writel(readl(msm_chip->regs.oe) & ~BIT(offset), msm_chip->regs.oe);
- spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
- return 0;
-}
-
-static int
-msm_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value)
-{
- struct msm_gpio_chip *msm_chip;
- unsigned long irq_flags;
-
- msm_chip = container_of(chip, struct msm_gpio_chip, chip);
- spin_lock_irqsave(&msm_chip->lock, irq_flags);
- msm_gpio_write(msm_chip, offset, value);
- writel(readl(msm_chip->regs.oe) | BIT(offset), msm_chip->regs.oe);
- spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
- return 0;
-}
-
-static int msm_gpio_get(struct gpio_chip *chip, unsigned offset)
-{
- struct msm_gpio_chip *msm_chip;
-
- msm_chip = container_of(chip, struct msm_gpio_chip, chip);
- return (readl(msm_chip->regs.in) & (1U << offset)) ? 1 : 0;
-}
-
-static void msm_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-{
- struct msm_gpio_chip *msm_chip;
- unsigned long irq_flags;
-
- msm_chip = container_of(chip, struct msm_gpio_chip, chip);
- spin_lock_irqsave(&msm_chip->lock, irq_flags);
- msm_gpio_write(msm_chip, offset, value);
- spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
-}
-
-static int msm_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
- return MSM_GPIO_TO_INT(chip->base + offset);
-}
-
-#ifdef CONFIG_MSM_GPIOMUX
-static int msm_gpio_request(struct gpio_chip *chip, unsigned offset)
-{
- return msm_gpiomux_get(chip->base + offset);
-}
-
-static void msm_gpio_free(struct gpio_chip *chip, unsigned offset)
-{
- msm_gpiomux_put(chip->base + offset);
-}
-#else
-#define msm_gpio_request NULL
-#define msm_gpio_free NULL
-#endif
-
-struct msm_gpio_chip msm_gpio_chips[] = {
-#if defined(CONFIG_ARCH_MSM7X00A)
- MSM_GPIO_BANK(0, 0, 15),
- MSM_GPIO_BANK(1, 16, 42),
- MSM_GPIO_BANK(2, 43, 67),
- MSM_GPIO_BANK(3, 68, 94),
- MSM_GPIO_BANK(4, 95, 106),
- MSM_GPIO_BANK(5, 107, 121),
-#elif defined(CONFIG_ARCH_MSM7X25) || defined(CONFIG_ARCH_MSM7X27)
- MSM_GPIO_BANK(0, 0, 15),
- MSM_GPIO_BANK(1, 16, 42),
- MSM_GPIO_BANK(2, 43, 67),
- MSM_GPIO_BANK(3, 68, 94),
- MSM_GPIO_BANK(4, 95, 106),
- MSM_GPIO_BANK(5, 107, 132),
-#elif defined(CONFIG_ARCH_MSM7X30)
- MSM_GPIO_BANK(0, 0, 15),
- MSM_GPIO_BANK(1, 16, 43),
- MSM_GPIO_BANK(2, 44, 67),
- MSM_GPIO_BANK(3, 68, 94),
- MSM_GPIO_BANK(4, 95, 106),
- MSM_GPIO_BANK(5, 107, 133),
- MSM_GPIO_BANK(6, 134, 150),
- MSM_GPIO_BANK(7, 151, 181),
-#elif defined(CONFIG_ARCH_QSD8X50)
- MSM_GPIO_BANK(0, 0, 15),
- MSM_GPIO_BANK(1, 16, 42),
- MSM_GPIO_BANK(2, 43, 67),
- MSM_GPIO_BANK(3, 68, 94),
- MSM_GPIO_BANK(4, 95, 103),
- MSM_GPIO_BANK(5, 104, 121),
- MSM_GPIO_BANK(6, 122, 152),
- MSM_GPIO_BANK(7, 153, 164),
-#endif
-};
-
-static void msm_gpio_irq_ack(struct irq_data *d)
-{
- unsigned long irq_flags;
- struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
- spin_lock_irqsave(&msm_chip->lock, irq_flags);
- msm_gpio_clear_detect_status(msm_chip,
- d->irq - gpio_to_irq(msm_chip->chip.base));
- spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
-}
-
-static void msm_gpio_irq_mask(struct irq_data *d)
-{
- unsigned long irq_flags;
- struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
- unsigned offset = d->irq - gpio_to_irq(msm_chip->chip.base);
-
- spin_lock_irqsave(&msm_chip->lock, irq_flags);
- /* level triggered interrupts are also latched */
- if (!(readl(msm_chip->regs.int_edge) & BIT(offset)))
- msm_gpio_clear_detect_status(msm_chip, offset);
- msm_chip->int_enable[0] &= ~BIT(offset);
- writel(msm_chip->int_enable[0], msm_chip->regs.int_en);
- spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
-}
-
-static void msm_gpio_irq_unmask(struct irq_data *d)
-{
- unsigned long irq_flags;
- struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
- unsigned offset = d->irq - gpio_to_irq(msm_chip->chip.base);
-
- spin_lock_irqsave(&msm_chip->lock, irq_flags);
- /* level triggered interrupts are also latched */
- if (!(readl(msm_chip->regs.int_edge) & BIT(offset)))
- msm_gpio_clear_detect_status(msm_chip, offset);
- msm_chip->int_enable[0] |= BIT(offset);
- writel(msm_chip->int_enable[0], msm_chip->regs.int_en);
- spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
-}
-
-static int msm_gpio_irq_set_wake(struct irq_data *d, unsigned int on)
-{
- unsigned long irq_flags;
- struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
- unsigned offset = d->irq - gpio_to_irq(msm_chip->chip.base);
-
- spin_lock_irqsave(&msm_chip->lock, irq_flags);
-
- if (on)
- msm_chip->int_enable[1] |= BIT(offset);
- else
- msm_chip->int_enable[1] &= ~BIT(offset);
-
- spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
- return 0;
-}
-
-static int msm_gpio_irq_set_type(struct irq_data *d, unsigned int flow_type)
-{
- unsigned long irq_flags;
- struct msm_gpio_chip *msm_chip = irq_data_get_irq_chip_data(d);
- unsigned offset = d->irq - gpio_to_irq(msm_chip->chip.base);
- unsigned val, mask = BIT(offset);
-
- spin_lock_irqsave(&msm_chip->lock, irq_flags);
- val = readl(msm_chip->regs.int_edge);
- if (flow_type & IRQ_TYPE_EDGE_BOTH) {
- writel(val | mask, msm_chip->regs.int_edge);
- __irq_set_handler_locked(d->irq, handle_edge_irq);
- } else {
- writel(val & ~mask, msm_chip->regs.int_edge);
- __irq_set_handler_locked(d->irq, handle_level_irq);
- }
- if ((flow_type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) {
- msm_chip->both_edge_detect |= mask;
- msm_gpio_update_both_edge_detect(msm_chip);
- } else {
- msm_chip->both_edge_detect &= ~mask;
- val = readl(msm_chip->regs.int_pos);
- if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_HIGH))
- writel(val | mask, msm_chip->regs.int_pos);
- else
- writel(val & ~mask, msm_chip->regs.int_pos);
- }
- spin_unlock_irqrestore(&msm_chip->lock, irq_flags);
- return 0;
-}
-
-static void msm_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
-{
- int i, j, mask;
- unsigned val;
-
- for (i = 0; i < ARRAY_SIZE(msm_gpio_chips); i++) {
- struct msm_gpio_chip *msm_chip = &msm_gpio_chips[i];
- val = readl(msm_chip->regs.int_status);
- val &= msm_chip->int_enable[0];
- while (val) {
- mask = val & -val;
- j = fls(mask) - 1;
- /* printk("%s %08x %08x bit %d gpio %d irq %d\n",
- __func__, v, m, j, msm_chip->chip.start + j,
- FIRST_GPIO_IRQ + msm_chip->chip.start + j); */
- val &= ~mask;
- generic_handle_irq(FIRST_GPIO_IRQ +
- msm_chip->chip.base + j);
- }
- }
- desc->irq_data.chip->irq_ack(&desc->irq_data);
-}
-
-static struct irq_chip msm_gpio_irq_chip = {
- .name = "msmgpio",
- .irq_ack = msm_gpio_irq_ack,
- .irq_mask = msm_gpio_irq_mask,
- .irq_unmask = msm_gpio_irq_unmask,
- .irq_set_wake = msm_gpio_irq_set_wake,
- .irq_set_type = msm_gpio_irq_set_type,
-};
-
-static int __init msm_init_gpio(void)
-{
- int i, j = 0;
-
- for (i = FIRST_GPIO_IRQ; i < FIRST_GPIO_IRQ + NR_GPIO_IRQS; i++) {
- if (i - FIRST_GPIO_IRQ >=
- msm_gpio_chips[j].chip.base +
- msm_gpio_chips[j].chip.ngpio)
- j++;
- irq_set_chip_data(i, &msm_gpio_chips[j]);
- irq_set_chip_and_handler(i, &msm_gpio_irq_chip,
- handle_edge_irq);
- set_irq_flags(i, IRQF_VALID);
- }
-
- for (i = 0; i < ARRAY_SIZE(msm_gpio_chips); i++) {
- spin_lock_init(&msm_gpio_chips[i].lock);
- writel(0, msm_gpio_chips[i].regs.int_en);
- gpiochip_add(&msm_gpio_chips[i].chip);
- }
-
- irq_set_chained_handler(INT_GPIO_GROUP1, msm_gpio_irq_handler);
- irq_set_chained_handler(INT_GPIO_GROUP2, msm_gpio_irq_handler);
- irq_set_irq_wake(INT_GPIO_GROUP1, 1);
- irq_set_irq_wake(INT_GPIO_GROUP2, 2);
- return 0;
-}
-
-postcore_initcall(msm_init_gpio);
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-19 06:47:26 +0000