diff options
Diffstat (limited to 'arch/arm/mach-msm/board-trout-gpio.c')
| -rw-r--r-- | arch/arm/mach-msm/board-trout-gpio.c | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/arch/arm/mach-msm/board-trout-gpio.c b/arch/arm/mach-msm/board-trout-gpio.c deleted file mode 100644 index 722ad63b7edc..000000000000 --- a/arch/arm/mach-msm/board-trout-gpio.c +++ /dev/null @@ -1,233 +0,0 @@ -/* - * linux/arch/arm/mach-msm/gpio.c - * - * Copyright (C) 2005 HP Labs - * Copyright (C) 2008 Google, Inc. - * Copyright (C) 2009 Pavel Machek <pavel@ucw.cz> - * - * 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. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/interrupt.h> -#include <linux/gpio.h> - -#include "board-trout.h" - -static uint8_t trout_int_mask[2] = { - [0] = 0xff, /* mask all interrupts */ - [1] = 0xff, -}; -static uint8_t trout_sleep_int_mask[] = { - [0] = 0xff, - [1] = 0xff, -}; - -struct msm_gpio_chip { - struct gpio_chip chip; - void __iomem *reg; /* Base of register bank */ - u8 shadow; -}; - -#define to_msm_gpio_chip(c) container_of(c, struct msm_gpio_chip, chip) - -static int msm_gpiolib_get(struct gpio_chip *chip, unsigned offset) -{ - struct msm_gpio_chip *msm_gpio = to_msm_gpio_chip(chip); - unsigned mask = 1 << offset; - - return !!(readb(msm_gpio->reg) & mask); -} - -static void msm_gpiolib_set(struct gpio_chip *chip, unsigned offset, int val) -{ - struct msm_gpio_chip *msm_gpio = to_msm_gpio_chip(chip); - unsigned mask = 1 << offset; - - if (val) - msm_gpio->shadow |= mask; - else - msm_gpio->shadow &= ~mask; - - writeb(msm_gpio->shadow, msm_gpio->reg); -} - -static int msm_gpiolib_direction_input(struct gpio_chip *chip, - unsigned offset) -{ - msm_gpiolib_set(chip, offset, 0); - return 0; -} - -static int msm_gpiolib_direction_output(struct gpio_chip *chip, - unsigned offset, int val) -{ - msm_gpiolib_set(chip, offset, val); - return 0; -} - -static int trout_gpio_to_irq(struct gpio_chip *chip, unsigned offset) -{ - return TROUT_GPIO_TO_INT(offset + chip->base); -} - -#define TROUT_GPIO_BANK(name, reg_num, base_gpio, shadow_val) \ - { \ - .chip = { \ - .label = name, \ - .direction_input = msm_gpiolib_direction_input,\ - .direction_output = msm_gpiolib_direction_output, \ - .get = msm_gpiolib_get, \ - .set = msm_gpiolib_set, \ - .to_irq = trout_gpio_to_irq, \ - .base = base_gpio, \ - .ngpio = 8, \ - }, \ - .reg = reg_num + TROUT_CPLD_BASE, \ - .shadow = shadow_val, \ - } - -static struct msm_gpio_chip msm_gpio_banks[] = { -#if defined(CONFIG_DEBUG_MSM_UART) && (CONFIG_DEBUG_UART_PHYS == 0xa9a00000) - /* H2W pins <-> UART1 */ - TROUT_GPIO_BANK("MISC2", 0x00, TROUT_GPIO_MISC2_BASE, 0x40), -#else - /* H2W pins <-> UART3, Bluetooth <-> UART1 */ - TROUT_GPIO_BANK("MISC2", 0x00, TROUT_GPIO_MISC2_BASE, 0x80), -#endif - /* I2C pull */ - TROUT_GPIO_BANK("MISC3", 0x02, TROUT_GPIO_MISC3_BASE, 0x04), - TROUT_GPIO_BANK("MISC4", 0x04, TROUT_GPIO_MISC4_BASE, 0), - /* mmdi 32k en */ - TROUT_GPIO_BANK("MISC5", 0x06, TROUT_GPIO_MISC5_BASE, 0x04), - TROUT_GPIO_BANK("INT2", 0x08, TROUT_GPIO_INT2_BASE, 0), - TROUT_GPIO_BANK("MISC1", 0x0a, TROUT_GPIO_MISC1_BASE, 0), - TROUT_GPIO_BANK("VIRTUAL", 0x12, TROUT_GPIO_VIRTUAL_BASE, 0), -}; - -static void trout_gpio_irq_ack(struct irq_data *d) -{ - int bank = TROUT_INT_TO_BANK(d->irq); - uint8_t mask = TROUT_INT_TO_MASK(d->irq); - int reg = TROUT_BANK_TO_STAT_REG(bank); - /*printk(KERN_INFO "trout_gpio_irq_ack irq %d\n", d->irq);*/ - writeb(mask, TROUT_CPLD_BASE + reg); -} - -static void trout_gpio_irq_mask(struct irq_data *d) -{ - unsigned long flags; - uint8_t reg_val; - int bank = TROUT_INT_TO_BANK(d->irq); - uint8_t mask = TROUT_INT_TO_MASK(d->irq); - int reg = TROUT_BANK_TO_MASK_REG(bank); - - local_irq_save(flags); - reg_val = trout_int_mask[bank] |= mask; - /*printk(KERN_INFO "trout_gpio_irq_mask irq %d => %d:%02x\n", - d->irq, bank, reg_val);*/ - writeb(reg_val, TROUT_CPLD_BASE + reg); - local_irq_restore(flags); -} - -static void trout_gpio_irq_unmask(struct irq_data *d) -{ - unsigned long flags; - uint8_t reg_val; - int bank = TROUT_INT_TO_BANK(d->irq); - uint8_t mask = TROUT_INT_TO_MASK(d->irq); - int reg = TROUT_BANK_TO_MASK_REG(bank); - - local_irq_save(flags); - reg_val = trout_int_mask[bank] &= ~mask; - /*printk(KERN_INFO "trout_gpio_irq_unmask irq %d => %d:%02x\n", - d->irq, bank, reg_val);*/ - writeb(reg_val, TROUT_CPLD_BASE + reg); - local_irq_restore(flags); -} - -int trout_gpio_irq_set_wake(struct irq_data *d, unsigned int on) -{ - unsigned long flags; - int bank = TROUT_INT_TO_BANK(d->irq); - uint8_t mask = TROUT_INT_TO_MASK(d->irq); - - local_irq_save(flags); - if(on) - trout_sleep_int_mask[bank] &= ~mask; - else - trout_sleep_int_mask[bank] |= mask; - local_irq_restore(flags); - return 0; -} - -static void trout_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) -{ - int j, m; - unsigned v; - int bank; - int stat_reg; - int int_base = TROUT_INT_START; - uint8_t int_mask; - - for (bank = 0; bank < 2; bank++) { - stat_reg = TROUT_BANK_TO_STAT_REG(bank); - v = readb(TROUT_CPLD_BASE + stat_reg); - int_mask = trout_int_mask[bank]; - if (v & int_mask) { - writeb(v & int_mask, TROUT_CPLD_BASE + stat_reg); - printk(KERN_ERR "trout_gpio_irq_handler: got masked " - "interrupt: %d:%02x\n", bank, v & int_mask); - } - v &= ~int_mask; - while (v) { - m = v & -v; - j = fls(m) - 1; - /*printk(KERN_INFO "msm_gpio_irq_handler %d:%02x %02x b" - "it %d irq %d\n", bank, v, m, j, int_base + j);*/ - v &= ~m; - generic_handle_irq(int_base + j); - } - int_base += TROUT_INT_BANK0_COUNT; - } - desc->irq_data.chip->irq_ack(&desc->irq_data); -} - -static struct irq_chip trout_gpio_irq_chip = { - .name = "troutgpio", - .irq_ack = trout_gpio_irq_ack, - .irq_mask = trout_gpio_irq_mask, - .irq_unmask = trout_gpio_irq_unmask, - .irq_set_wake = trout_gpio_irq_set_wake, -}; - -/* - * Called from the processor-specific init to enable GPIO pin support. - */ -int __init trout_init_gpio(void) -{ - int i; - for(i = TROUT_INT_START; i <= TROUT_INT_END; i++) { - irq_set_chip_and_handler(i, &trout_gpio_irq_chip, - handle_edge_irq); - set_irq_flags(i, IRQF_VALID); - } - - for (i = 0; i < ARRAY_SIZE(msm_gpio_banks); i++) - gpiochip_add(&msm_gpio_banks[i].chip); - - irq_set_irq_type(MSM_GPIO_TO_INT(17), IRQF_TRIGGER_HIGH); - irq_set_chained_handler(MSM_GPIO_TO_INT(17), trout_gpio_irq_handler); - irq_set_irq_wake(MSM_GPIO_TO_INT(17), 1); - - return 0; -} - -postcore_initcall(trout_init_gpio); - |