diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/mach-wmt/gpio.c')
| -rwxr-xr-x | ANDROID_3.4.5/arch/arm/mach-wmt/gpio.c | 614 |
1 files changed, 0 insertions, 614 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mach-wmt/gpio.c b/ANDROID_3.4.5/arch/arm/mach-wmt/gpio.c deleted file mode 100755 index 7558c137..00000000 --- a/ANDROID_3.4.5/arch/arm/mach-wmt/gpio.c +++ /dev/null @@ -1,614 +0,0 @@ -/* linux/arch/arm/mach-wmt/gpio.c - * - * Copyright (c) 2013 WonderMedia Technologies, Inc. - * - * 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/module.h> -#include <linux/device.h> -#include <linux/gpio.h> -#include <linux/init.h> -#include <linux/irq.h> -#include <linux/io.h> -#include <linux/seq_file.h> -#include <linux/kobject.h> -#include <linux/debugfs.h> - -#include <mach/hardware.h> -#include <mach/wmt_iomux.h> - -#undef WMT_PIN -#define WMT_PIN(__gp, __bit, __irq, __name) \ - { .label = #__name, .regoff = __gp, .shift = __bit, .irqnum = __irq }, - -const static struct wmt_gpio { - const char *label; - unsigned char regoff; - unsigned char shift; - int irqnum; -} wmt_gpios[] = { - #include <mach/iomux.h> -}; - -#define to_wmt(__chip) container_of(__chip, struct wmt_gpio_port, chip) - -struct wmt_gpio_port { - uint32_t base; - uint32_t gpio_irq_no_base; - int gpio_irq_nr; - struct gpio_chip chip; - spinlock_t lock; -}; - -static struct wmt_gpio_port wmt_gpio_port; - -#define INVALUE_REGS 0x00 -#define ENABLE_REGS 0x40 -#define DIRECTION_REGS 0x80 -#define OUTVALUE_REGS 0xc0 - -#define INTMASK_REGS 0x300 -#define INTSTAT_REGS 0x360 - -#define PULLENABLE_REGS 0x480 -#define PULLCONTROL_REGS 0x4c0 - -#define GPIO_INT_LOW_LEV 0x0 -#define GPIO_INT_HIGH_LEV 0x1 -#define GPIO_INT_FALL_EDGE 0x2 -#define GPIO_INT_RISE_EDGE 0x3 -#define GPIO_INT_BOTH_EDGE 0x4 - -#define CHIP_GPIO_BASE 0 - -static void _clear_gpio_irqstatus(u32 irqindex) -{ - struct wmt_gpio_port *port = &wmt_gpio_port; - u32 addr = port->base + INTSTAT_REGS + (irqindex >> 3); - u8 index = irqindex & 0x7; - - __raw_writeb(1 << index, addr); -} - -static int _gpio_irqstatus(u32 irqindex) -{ - u8 l; - struct wmt_gpio_port *port = &wmt_gpio_port; - u32 addr = port->base + INTSTAT_REGS + (irqindex >> 3); - u8 index = irqindex & 0x7; - l = __raw_readb(addr); - return l & (1<<index); -} - -int gpio_irqstatus(unsigned int gpio) -{ - int offset = gpio - CHIP_GPIO_BASE; - int irqindex = wmt_gpios[offset].irqnum; - return _gpio_irqstatus(irqindex); -} -EXPORT_SYMBOL(gpio_irqstatus); - -static void _set_gpio_irqenable(u32 irqindex, int enable) -{ - struct wmt_gpio_port *port = &wmt_gpio_port; - u32 addr = port->base + INTMASK_REGS + irqindex; - u8 l; - - l = __raw_readb(addr); - l = (l & 0x7f) | (!!enable << 7); - __raw_writeb(l, addr); -} - -int is_gpio_irqenable(unsigned int gpio) -{ - u8 l; - int offset = gpio - CHIP_GPIO_BASE; - int irqindex = wmt_gpios[offset].irqnum; - struct wmt_gpio_port *port = &wmt_gpio_port; - u32 addr = port->base + INTMASK_REGS + irqindex; - - l = __raw_readb(addr); - return (l & 0x80); -} -EXPORT_SYMBOL(is_gpio_irqenable); - -void wmt_gpio_ack_irq(unsigned int gpio) -{ - int offset = gpio - CHIP_GPIO_BASE; - int irqindex = wmt_gpios[offset].irqnum; - - _clear_gpio_irqstatus(irqindex); -} -EXPORT_SYMBOL(wmt_gpio_ack_irq); - -void wmt_gpio_mask_irq(unsigned int gpio) -{ - int offset = gpio - CHIP_GPIO_BASE; - int irqindex = wmt_gpios[offset].irqnum; - - _set_gpio_irqenable(irqindex, 0); -} -EXPORT_SYMBOL(wmt_gpio_mask_irq); - -void wmt_gpio_unmask_irq(unsigned int gpio) -{ - int offset = gpio - CHIP_GPIO_BASE; - int irqindex = wmt_gpios[offset].irqnum; - - _set_gpio_irqenable(irqindex, 1); -} -EXPORT_SYMBOL(wmt_gpio_unmask_irq); - -int wmt_gpio_set_irq_type(unsigned int gpio, u32 type) -{ - struct wmt_gpio_port *port = &wmt_gpio_port; - int offset = gpio - CHIP_GPIO_BASE; - int irqindex = wmt_gpios[offset].irqnum; - int edge; - u32 reg, val; - - switch (type) { - case IRQ_TYPE_EDGE_RISING: - edge = GPIO_INT_RISE_EDGE; - break; - case IRQ_TYPE_EDGE_FALLING: - edge = GPIO_INT_FALL_EDGE; - break; - case IRQ_TYPE_EDGE_BOTH: - edge = GPIO_INT_BOTH_EDGE; - break; - case IRQ_TYPE_LEVEL_LOW: - edge = GPIO_INT_LOW_LEV; - break; - case IRQ_TYPE_LEVEL_HIGH: - edge = GPIO_INT_HIGH_LEV; - break; - default: - return -EINVAL; - } - - reg = port->base + INTMASK_REGS + irqindex; - val = __raw_readb(reg) & 0xf8; - __raw_writeb(val | edge, reg); - - _clear_gpio_irqstatus(irqindex); - - return 0; -} -EXPORT_SYMBOL(wmt_gpio_set_irq_type); - -#ifdef WMT_GPIO_IRQ -static void gpio_ack_irq(struct irq_data *d) -{ - struct wmt_gpio_port *port = &wmt_gpio_port; - int irqindex = d->irq - port->gpio_irq_no_base; - - _clear_gpio_irqstatus(irqindex); -} - -static void gpio_mask_irq(struct irq_data *d) -{ - struct wmt_gpio_port *port = &wmt_gpio_port; - int irqindex = d->irq - port->gpio_irq_no_base; - - _set_gpio_irqenable(irqindex, 0); -} - -static void gpio_unmask_irq(struct irq_data *d) -{ - struct wmt_gpio_port *port = &wmt_gpio_port; - int irqindex = d->irq - port->gpio_irq_no_base; - - _set_gpio_irqenable(irqindex, 1); -} - -static int gpio_set_irq_type(struct irq_data *d, u32 type) -{ - struct wmt_gpio_port *port = &wmt_gpio_port; - int edge, irqindex; - u32 reg, val; - - switch (type) { - case IRQ_TYPE_EDGE_RISING: - edge = GPIO_INT_RISE_EDGE; - break; - case IRQ_TYPE_EDGE_FALLING: - edge = GPIO_INT_FALL_EDGE; - break; - case IRQ_TYPE_EDGE_BOTH: - edge = GPIO_INT_BOTH_EDGE; - break; - case IRQ_TYPE_LEVEL_LOW: - edge = GPIO_INT_LOW_LEV; - break; - case IRQ_TYPE_LEVEL_HIGH: - edge = GPIO_INT_HIGH_LEV; - break; - default: - return -EINVAL; - } - - irqindex = d->irq - port->gpio_irq_no_base; - reg = port->base + INTMASK_REGS + irqindex; - val = __raw_readb(reg) & 0xf8; - __raw_writeb(val | edge, reg); - - _clear_gpio_irqstatus(irqindex); - - return 0; -} - -/* WMT has one interrupt *for all* gpio ports */ -static void wmt_gpio_irq_handler(u32 irq, struct irq_desc *desc) -{ - int i; - u32 irq_msk, irq_stat; - struct wmt_gpio_port *port = &wmt_gpio_port; - - /* walk through all interrupt status registers */ - for (i = 0; i < 4; i++) { - irq_msk = __raw_readl(port->base + INTMASK_REGS + i*4); - if (!irq_msk) - continue; - - irq_stat = __raw_readl(port->base + INTSTAT_REGS + i*4) & irq_msk; - while (irq_stat != 0) { - int irqoffset = fls(irq_stat) - 1; - - generic_handle_irq(port->gpio_irq_no_base + i*32 + irqoffset); - - irq_stat &= ~(1 << irqoffset); - } - } -} - -static struct irq_chip gpio_irq_chip = { - .name = "GPIO", - .irq_ack = gpio_ack_irq, - .irq_mask = gpio_mask_irq, - .irq_unmask = gpio_unmask_irq, - .irq_set_type = gpio_set_irq_type, -}; -#endif - -static int wmt_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - struct wmt_gpio_port *port = to_wmt(chip); - uint32_t base = port->base; - uint8_t regoff = wmt_gpios[offset].regoff; - uint8_t shift = wmt_gpios[offset].shift; - uint8_t val; - - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - - WARN_ON(offset >= ARRAY_SIZE(wmt_gpios)); - - val = readb(base + ENABLE_REGS + regoff); - val |= (1 << shift); - writeb(val, base + ENABLE_REGS + regoff); - - spin_unlock_irqrestore(&port->lock, flags); - return 0; -} - -static void wmt_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - struct wmt_gpio_port *port = to_wmt(chip); -// uint32_t base = port->base; -// uint8_t regoff = wmt_gpios[offset].regoff; -// uint8_t shift = wmt_gpios[offset].shift; -// uint8_t val; - - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - - WARN_ON(offset >= ARRAY_SIZE(wmt_gpios)); - -// val = readb(base + ENABLE_REGS + regoff); -// val &= ~(1 << shift); -// writeb(val, base + ENABLE_REGS + regoff); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void _set_gpio_direction(struct gpio_chip *chip, unsigned offset, int dir) -{ - struct wmt_gpio_port *port = to_wmt(chip); - uint32_t base = port->base; - uint8_t regoff = wmt_gpios[offset].regoff; - uint8_t shift = wmt_gpios[offset].shift; - uint8_t val; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - - WARN_ON(offset >= ARRAY_SIZE(wmt_gpios)); - - val = readb(base + DIRECTION_REGS + regoff); - if (dir) - val |= (1 << shift); - else - val &= ~(1 << shift); - writeb(val, base + DIRECTION_REGS + regoff); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static int wmt_gpio_get_value(struct gpio_chip *chip, unsigned offset) -{ - struct wmt_gpio_port *port = to_wmt(chip); - uint32_t base = port->base; - uint8_t regoff = wmt_gpios[offset].regoff; - uint8_t shift = wmt_gpios[offset].shift; - uint8_t val; - int dir; - - WARN_ON(offset >= ARRAY_SIZE(wmt_gpios)); - - val = readb(base + DIRECTION_REGS + regoff); - dir = (val >> shift) & 1; - - if (dir) - return (readb(base + OUTVALUE_REGS + regoff) >> shift) & 1; - else - return (readb(base + INVALUE_REGS + regoff) >> shift) & 1; -} - -static void wmt_gpio_set_value(struct gpio_chip *chip, - unsigned offset, int value) -{ - struct wmt_gpio_port *port = to_wmt(chip); - uint32_t base = port->base; - uint8_t regoff = wmt_gpios[offset].regoff; - uint8_t shift = wmt_gpios[offset].shift; - uint8_t val; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - - WARN_ON(offset >= ARRAY_SIZE(wmt_gpios)); - - val = readb(base + OUTVALUE_REGS + regoff); - - if (value) - val |= (1 << shift); - else - val &= ~(1 << shift); - - writeb(val, base + OUTVALUE_REGS + regoff); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static int wmt_gpio_direction_input(struct gpio_chip *chip, unsigned offset) -{ - _set_gpio_direction(chip, offset, 0); - return 0; -} - -static int wmt_gpio_direction_output(struct gpio_chip *chip, - unsigned offset, int value) -{ - wmt_gpio_set_value(chip, offset, value); - _set_gpio_direction(chip, offset, 1); - return 0; -} - -static void _set_gpio_pullenable(unsigned offset, int enable) -{ - struct wmt_gpio_port *port = &wmt_gpio_port; - uint32_t base = port->base; - uint8_t regoff = wmt_gpios[offset].regoff; - uint8_t shift = wmt_gpios[offset].shift; - uint8_t val; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - - WARN_ON(offset >= ARRAY_SIZE(wmt_gpios)); - - val = readb(base + PULLENABLE_REGS + regoff); - if (enable) - val |= (1 << shift); - else - val &= ~(1 << shift); - writeb(val, base + PULLENABLE_REGS + regoff); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void _set_gpio_pullup(unsigned offset, int up) -{ - struct wmt_gpio_port *port = &wmt_gpio_port; - uint32_t base = port->base; - uint8_t regoff = wmt_gpios[offset].regoff; - uint8_t shift = wmt_gpios[offset].shift; - uint8_t val; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - - WARN_ON(offset >= ARRAY_SIZE(wmt_gpios)); - - val = readb(base + PULLCONTROL_REGS + regoff); - if (up) - val |= (1 << shift); - else - val &= ~(1 << shift); - writeb(val, base + PULLCONTROL_REGS + regoff); - - spin_unlock_irqrestore(&port->lock, flags); -} - -int wmt_gpio_setpull(unsigned int gpio, enum wmt_gpio_pulltype pull) -{ - int offset = gpio - CHIP_GPIO_BASE; - - switch (pull) { - case WMT_GPIO_PULL_NONE: - _set_gpio_pullenable(offset, 0); - break; - case WMT_GPIO_PULL_UP: - _set_gpio_pullenable(offset, 1); - _set_gpio_pullup(offset, 1); - break; - case WMT_GPIO_PULL_DOWN: - _set_gpio_pullenable(offset, 1); - _set_gpio_pullup(offset, 0); - break; - default: - return -EINVAL; - } - return 0; -} - -static int _get_gpio_pull(unsigned offset) -{ - struct wmt_gpio_port *port = &wmt_gpio_port; - uint32_t base = port->base; - uint8_t regoff = wmt_gpios[offset].regoff; - uint8_t shift = wmt_gpios[offset].shift; - uint8_t val; - int dir; - - WARN_ON(offset >= ARRAY_SIZE(wmt_gpios)); - - val = readb(base + DIRECTION_REGS + regoff); - dir = (val >> shift) & 1; - - if (dir) - return (readb(base + OUTVALUE_REGS + regoff) >> shift) & 1; - else - return (readb(base + INVALUE_REGS + regoff) >> shift) & 1; -} - - -int wmt_gpio_getpull(unsigned int gpio) -{ - int offset = gpio - CHIP_GPIO_BASE; - - return _get_gpio_pull(offset); -} - -EXPORT_SYMBOL(wmt_gpio_setpull); -EXPORT_SYMBOL(wmt_gpio_getpull); - -#ifdef WMT_GPIO_IRQ -static int wmt_gpio_to_irq(struct gpio_chip *chip, unsigned offset) -{ - struct wmt_gpio_port *port = &wmt_gpio_port; - - WARN_ON(offset >= ARRAY_SIZE(wmt_gpios)); - - if (wmt_gpios[offset].irqnum < 0) - return -EINVAL; - - return port->gpio_irq_no_base + wmt_gpios[offset].irqnum; -} -#endif - -static struct wmt_gpio_port wmt_gpio_port = { - .base = GPIO_BASE_ADDR, -#ifdef WMT_GPIO_IRQ - .gpio_irq_no_base = WMT_GPIO_IRQ_START, - .gpio_irq_nr = WMT_GPIO_IRQS, -#endif - .chip = { - .label = "wmt-gpio", - .direction_input = wmt_gpio_direction_input, - .direction_output = wmt_gpio_direction_output, - .request = wmt_gpio_request, - .free = wmt_gpio_free, - .get = wmt_gpio_get_value, - .set = wmt_gpio_set_value, -#ifdef WMT_GPIO_IRQ - .to_irq = wmt_gpio_to_irq, -#endif - .can_sleep = 0, - .base = CHIP_GPIO_BASE, - .ngpio = ARRAY_SIZE(wmt_gpios), - }, -}; - -void __init wmt_gpio_init(void) -{ -#ifdef WMT_GPIO_IRQ - int irq; -#endif - - spin_lock_init(&wmt_gpio_port.lock); - BUG_ON(gpiochip_add(&wmt_gpio_port.chip) < 0); - - /* XXX conflict with touchscreen irq */ -#ifdef WMT_GPIO_IRQ - for (irq = wmt_gpio_port.gpio_irq_no_base; - irq < wmt_gpio_port.gpio_irq_no_base + wmt_gpio_port.gpio_irq_nr; - irq++) { - irq_set_chip_and_handler(irq, &gpio_irq_chip, handle_level_irq); - set_irq_flags(irq, IRQF_VALID); - } - - irq_set_chained_handler(IRQ_GPIO, wmt_gpio_irq_handler); -#endif -} - -const char *wmt_gpio_name(int gpio) -{ - if (gpio >= ARRAY_SIZE(wmt_gpios)) { - pr_err("wmt: can not find gpio-%d\n", gpio); - return NULL; - } - - return wmt_gpios[gpio].label; -} - -#ifdef CONFIG_DEBUG_FS - -static int wmt_gpio_show(struct seq_file *s, void *unused) -{ - unsigned i; - - seq_printf(s, "GPIONUM , REGOFF , SHIFT , MACRO NAME\n"); - seq_printf(s, "---------+--------+-------+-----------\n"); - - for (i = 0; i < wmt_gpio_port.chip.ngpio; i++) { - seq_printf(s, "gpio-%-3d , 0x%02x , %d , %s", - i, wmt_gpios[i].regoff, wmt_gpios[i].shift, wmt_gpios[i].label); - seq_printf(s, "\n"); - } - return 0; -} - -static int wmt_gpio_open(struct inode *inode, struct file *file) -{ - return single_open(file, wmt_gpio_show, NULL); -} - -static const struct file_operations wmt_gpio_operations = { - .open = wmt_gpio_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int __init wmt_gpio_debugfs_init(void) -{ - /* /sys/kernel/debug/wmt-gpio */ - (void) debugfs_create_file("wmt-gpio", S_IFREG | S_IRUGO, - NULL, NULL, &wmt_gpio_operations); - return 0; -} -subsys_initcall(wmt_gpio_debugfs_init); - -#endif /* DEBUG_FS */ - |