Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) ST-Ericsson SA 2010 |
| 3 | * |
| 4 | * License Terms: GNU General Public License, version 2 |
| 5 | * Author: Hanumath Prasad <hanumath.prasad@stericsson.com> for ST-Ericsson |
| 6 | * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson |
| 7 | */ |
| 8 | |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/init.h> |
| 11 | #include <linux/platform_device.h> |
| 12 | #include <linux/slab.h> |
| 13 | #include <linux/gpio.h> |
| 14 | #include <linux/irq.h> |
| 15 | #include <linux/interrupt.h> |
Sundar Iyer | c6eda6c | 2010-12-13 09:33:12 +0530 | [diff] [blame] | 16 | #include <linux/mfd/tc3589x.h> |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 17 | |
| 18 | /* |
| 19 | * These registers are modified under the irq bus lock and cached to avoid |
| 20 | * unnecessary writes in bus_sync_unlock. |
| 21 | */ |
| 22 | enum { REG_IBE, REG_IEV, REG_IS, REG_IE }; |
| 23 | |
| 24 | #define CACHE_NR_REGS 4 |
| 25 | #define CACHE_NR_BANKS 3 |
| 26 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 27 | struct tc3589x_gpio { |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 28 | struct gpio_chip chip; |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 29 | struct tc3589x *tc3589x; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 30 | struct device *dev; |
| 31 | struct mutex irq_lock; |
| 32 | |
| 33 | int irq_base; |
| 34 | |
| 35 | /* Caches of interrupt control registers for bus_lock */ |
| 36 | u8 regs[CACHE_NR_REGS][CACHE_NR_BANKS]; |
| 37 | u8 oldregs[CACHE_NR_REGS][CACHE_NR_BANKS]; |
| 38 | }; |
| 39 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 40 | static inline struct tc3589x_gpio *to_tc3589x_gpio(struct gpio_chip *chip) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 41 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 42 | return container_of(chip, struct tc3589x_gpio, chip); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 43 | } |
| 44 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 45 | static int tc3589x_gpio_get(struct gpio_chip *chip, unsigned offset) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 46 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 47 | struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); |
| 48 | struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; |
| 49 | u8 reg = TC3589x_GPIODATA0 + (offset / 8) * 2; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 50 | u8 mask = 1 << (offset % 8); |
| 51 | int ret; |
| 52 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 53 | ret = tc3589x_reg_read(tc3589x, reg); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 54 | if (ret < 0) |
| 55 | return ret; |
| 56 | |
| 57 | return ret & mask; |
| 58 | } |
| 59 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 60 | static void tc3589x_gpio_set(struct gpio_chip *chip, unsigned offset, int val) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 61 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 62 | struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); |
| 63 | struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; |
| 64 | u8 reg = TC3589x_GPIODATA0 + (offset / 8) * 2; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 65 | unsigned pos = offset % 8; |
| 66 | u8 data[] = {!!val << pos, 1 << pos}; |
| 67 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 68 | tc3589x_block_write(tc3589x, reg, ARRAY_SIZE(data), data); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 69 | } |
| 70 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 71 | static int tc3589x_gpio_direction_output(struct gpio_chip *chip, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 72 | unsigned offset, int val) |
| 73 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 74 | struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); |
| 75 | struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; |
| 76 | u8 reg = TC3589x_GPIODIR0 + offset / 8; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 77 | unsigned pos = offset % 8; |
| 78 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 79 | tc3589x_gpio_set(chip, offset, val); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 80 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 81 | return tc3589x_set_bits(tc3589x, reg, 1 << pos, 1 << pos); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 82 | } |
| 83 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 84 | static int tc3589x_gpio_direction_input(struct gpio_chip *chip, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 85 | unsigned offset) |
| 86 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 87 | struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); |
| 88 | struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; |
| 89 | u8 reg = TC3589x_GPIODIR0 + offset / 8; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 90 | unsigned pos = offset % 8; |
| 91 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 92 | return tc3589x_set_bits(tc3589x, reg, 1 << pos, 0); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 93 | } |
| 94 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 95 | static int tc3589x_gpio_to_irq(struct gpio_chip *chip, unsigned offset) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 96 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 97 | struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 98 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 99 | return tc3589x_gpio->irq_base + offset; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | static struct gpio_chip template_chip = { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 103 | .label = "tc3589x", |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 104 | .owner = THIS_MODULE, |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 105 | .direction_input = tc3589x_gpio_direction_input, |
| 106 | .get = tc3589x_gpio_get, |
| 107 | .direction_output = tc3589x_gpio_direction_output, |
| 108 | .set = tc3589x_gpio_set, |
| 109 | .to_irq = tc3589x_gpio_to_irq, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 110 | .can_sleep = 1, |
| 111 | }; |
| 112 | |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 113 | static int tc3589x_gpio_irq_set_type(struct irq_data *d, unsigned int type) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 114 | { |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 115 | struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); |
| 116 | int offset = d->irq - tc3589x_gpio->irq_base; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 117 | int regoffset = offset / 8; |
| 118 | int mask = 1 << (offset % 8); |
| 119 | |
| 120 | if (type == IRQ_TYPE_EDGE_BOTH) { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 121 | tc3589x_gpio->regs[REG_IBE][regoffset] |= mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 122 | return 0; |
| 123 | } |
| 124 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 125 | tc3589x_gpio->regs[REG_IBE][regoffset] &= ~mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 126 | |
| 127 | if (type == IRQ_TYPE_LEVEL_LOW || type == IRQ_TYPE_LEVEL_HIGH) |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 128 | tc3589x_gpio->regs[REG_IS][regoffset] |= mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 129 | else |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 130 | tc3589x_gpio->regs[REG_IS][regoffset] &= ~mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 131 | |
| 132 | if (type == IRQ_TYPE_EDGE_RISING || type == IRQ_TYPE_LEVEL_HIGH) |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 133 | tc3589x_gpio->regs[REG_IEV][regoffset] |= mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 134 | else |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 135 | tc3589x_gpio->regs[REG_IEV][regoffset] &= ~mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 136 | |
| 137 | return 0; |
| 138 | } |
| 139 | |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 140 | static void tc3589x_gpio_irq_lock(struct irq_data *d) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 141 | { |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 142 | struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 143 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 144 | mutex_lock(&tc3589x_gpio->irq_lock); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 145 | } |
| 146 | |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 147 | static void tc3589x_gpio_irq_sync_unlock(struct irq_data *d) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 148 | { |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 149 | struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 150 | struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 151 | static const u8 regmap[] = { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 152 | [REG_IBE] = TC3589x_GPIOIBE0, |
| 153 | [REG_IEV] = TC3589x_GPIOIEV0, |
| 154 | [REG_IS] = TC3589x_GPIOIS0, |
| 155 | [REG_IE] = TC3589x_GPIOIE0, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 156 | }; |
| 157 | int i, j; |
| 158 | |
| 159 | for (i = 0; i < CACHE_NR_REGS; i++) { |
| 160 | for (j = 0; j < CACHE_NR_BANKS; j++) { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 161 | u8 old = tc3589x_gpio->oldregs[i][j]; |
| 162 | u8 new = tc3589x_gpio->regs[i][j]; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 163 | |
| 164 | if (new == old) |
| 165 | continue; |
| 166 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 167 | tc3589x_gpio->oldregs[i][j] = new; |
| 168 | tc3589x_reg_write(tc3589x, regmap[i] + j * 8, new); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 169 | } |
| 170 | } |
| 171 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 172 | mutex_unlock(&tc3589x_gpio->irq_lock); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 173 | } |
| 174 | |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 175 | static void tc3589x_gpio_irq_mask(struct irq_data *d) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 176 | { |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 177 | struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); |
| 178 | int offset = d->irq - tc3589x_gpio->irq_base; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 179 | int regoffset = offset / 8; |
| 180 | int mask = 1 << (offset % 8); |
| 181 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 182 | tc3589x_gpio->regs[REG_IE][regoffset] &= ~mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 183 | } |
| 184 | |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 185 | static void tc3589x_gpio_irq_unmask(struct irq_data *d) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 186 | { |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 187 | struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); |
| 188 | int offset = d->irq - tc3589x_gpio->irq_base; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 189 | int regoffset = offset / 8; |
| 190 | int mask = 1 << (offset % 8); |
| 191 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 192 | tc3589x_gpio->regs[REG_IE][regoffset] |= mask; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 193 | } |
| 194 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 195 | static struct irq_chip tc3589x_gpio_irq_chip = { |
| 196 | .name = "tc3589x-gpio", |
Lennert Buytenhek | 33fcc1b | 2011-01-12 17:00:19 -0800 | [diff] [blame] | 197 | .irq_bus_lock = tc3589x_gpio_irq_lock, |
| 198 | .irq_bus_sync_unlock = tc3589x_gpio_irq_sync_unlock, |
| 199 | .irq_mask = tc3589x_gpio_irq_mask, |
| 200 | .irq_unmask = tc3589x_gpio_irq_unmask, |
| 201 | .irq_set_type = tc3589x_gpio_irq_set_type, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 202 | }; |
| 203 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 204 | static irqreturn_t tc3589x_gpio_irq(int irq, void *dev) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 205 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 206 | struct tc3589x_gpio *tc3589x_gpio = dev; |
| 207 | struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 208 | u8 status[CACHE_NR_BANKS]; |
| 209 | int ret; |
| 210 | int i; |
| 211 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 212 | ret = tc3589x_block_read(tc3589x, TC3589x_GPIOMIS0, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 213 | ARRAY_SIZE(status), status); |
| 214 | if (ret < 0) |
| 215 | return IRQ_NONE; |
| 216 | |
| 217 | for (i = 0; i < ARRAY_SIZE(status); i++) { |
| 218 | unsigned int stat = status[i]; |
| 219 | if (!stat) |
| 220 | continue; |
| 221 | |
| 222 | while (stat) { |
| 223 | int bit = __ffs(stat); |
| 224 | int line = i * 8 + bit; |
| 225 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 226 | handle_nested_irq(tc3589x_gpio->irq_base + line); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 227 | stat &= ~(1 << bit); |
| 228 | } |
| 229 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 230 | tc3589x_reg_write(tc3589x, TC3589x_GPIOIC0 + i, status[i]); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | return IRQ_HANDLED; |
| 234 | } |
| 235 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 236 | static int tc3589x_gpio_irq_init(struct tc3589x_gpio *tc3589x_gpio) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 237 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 238 | int base = tc3589x_gpio->irq_base; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 239 | int irq; |
| 240 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 241 | for (irq = base; irq < base + tc3589x_gpio->chip.ngpio; irq++) { |
Thomas Gleixner | b51804b | 2011-03-24 21:27:36 +0000 | [diff] [blame^] | 242 | irq_set_chip_data(irq, tc3589x_gpio); |
| 243 | irq_set_chip_and_handler(irq, &tc3589x_gpio_irq_chip, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 244 | handle_simple_irq); |
Thomas Gleixner | b51804b | 2011-03-24 21:27:36 +0000 | [diff] [blame^] | 245 | irq_set_nested_thread(irq, 1); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 246 | #ifdef CONFIG_ARM |
| 247 | set_irq_flags(irq, IRQF_VALID); |
| 248 | #else |
Thomas Gleixner | b51804b | 2011-03-24 21:27:36 +0000 | [diff] [blame^] | 249 | irq_set_noprobe(irq); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 250 | #endif |
| 251 | } |
| 252 | |
| 253 | return 0; |
| 254 | } |
| 255 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 256 | static void tc3589x_gpio_irq_remove(struct tc3589x_gpio *tc3589x_gpio) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 257 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 258 | int base = tc3589x_gpio->irq_base; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 259 | int irq; |
| 260 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 261 | for (irq = base; irq < base + tc3589x_gpio->chip.ngpio; irq++) { |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 262 | #ifdef CONFIG_ARM |
| 263 | set_irq_flags(irq, 0); |
| 264 | #endif |
Thomas Gleixner | b51804b | 2011-03-24 21:27:36 +0000 | [diff] [blame^] | 265 | irq_set_chip_and_handler(irq, NULL, NULL); |
| 266 | irq_set_chip_data(irq, NULL); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 267 | } |
| 268 | } |
| 269 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 270 | static int __devinit tc3589x_gpio_probe(struct platform_device *pdev) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 271 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 272 | struct tc3589x *tc3589x = dev_get_drvdata(pdev->dev.parent); |
| 273 | struct tc3589x_gpio_platform_data *pdata; |
| 274 | struct tc3589x_gpio *tc3589x_gpio; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 275 | int ret; |
| 276 | int irq; |
| 277 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 278 | pdata = tc3589x->pdata->gpio; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 279 | if (!pdata) |
| 280 | return -ENODEV; |
| 281 | |
| 282 | irq = platform_get_irq(pdev, 0); |
| 283 | if (irq < 0) |
| 284 | return irq; |
| 285 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 286 | tc3589x_gpio = kzalloc(sizeof(struct tc3589x_gpio), GFP_KERNEL); |
| 287 | if (!tc3589x_gpio) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 288 | return -ENOMEM; |
| 289 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 290 | mutex_init(&tc3589x_gpio->irq_lock); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 291 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 292 | tc3589x_gpio->dev = &pdev->dev; |
| 293 | tc3589x_gpio->tc3589x = tc3589x; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 294 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 295 | tc3589x_gpio->chip = template_chip; |
| 296 | tc3589x_gpio->chip.ngpio = tc3589x->num_gpio; |
| 297 | tc3589x_gpio->chip.dev = &pdev->dev; |
| 298 | tc3589x_gpio->chip.base = pdata->gpio_base; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 299 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 300 | tc3589x_gpio->irq_base = tc3589x->irq_base + TC3589x_INT_GPIO(0); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 301 | |
| 302 | /* Bring the GPIO module out of reset */ |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 303 | ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, |
| 304 | TC3589x_RSTCTRL_GPIRST, 0); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 305 | if (ret < 0) |
| 306 | goto out_free; |
| 307 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 308 | ret = tc3589x_gpio_irq_init(tc3589x_gpio); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 309 | if (ret) |
| 310 | goto out_free; |
| 311 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 312 | ret = request_threaded_irq(irq, NULL, tc3589x_gpio_irq, IRQF_ONESHOT, |
| 313 | "tc3589x-gpio", tc3589x_gpio); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 314 | if (ret) { |
| 315 | dev_err(&pdev->dev, "unable to get irq: %d\n", ret); |
| 316 | goto out_removeirq; |
| 317 | } |
| 318 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 319 | ret = gpiochip_add(&tc3589x_gpio->chip); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 320 | if (ret) { |
| 321 | dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret); |
| 322 | goto out_freeirq; |
| 323 | } |
| 324 | |
Rabin Vincent | f0a7a98 | 2010-09-13 13:04:02 +0100 | [diff] [blame] | 325 | if (pdata->setup) |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 326 | pdata->setup(tc3589x, tc3589x_gpio->chip.base); |
Rabin Vincent | f0a7a98 | 2010-09-13 13:04:02 +0100 | [diff] [blame] | 327 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 328 | platform_set_drvdata(pdev, tc3589x_gpio); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 329 | |
| 330 | return 0; |
| 331 | |
| 332 | out_freeirq: |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 333 | free_irq(irq, tc3589x_gpio); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 334 | out_removeirq: |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 335 | tc3589x_gpio_irq_remove(tc3589x_gpio); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 336 | out_free: |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 337 | kfree(tc3589x_gpio); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 338 | return ret; |
| 339 | } |
| 340 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 341 | static int __devexit tc3589x_gpio_remove(struct platform_device *pdev) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 342 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 343 | struct tc3589x_gpio *tc3589x_gpio = platform_get_drvdata(pdev); |
| 344 | struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; |
| 345 | struct tc3589x_gpio_platform_data *pdata = tc3589x->pdata->gpio; |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 346 | int irq = platform_get_irq(pdev, 0); |
| 347 | int ret; |
| 348 | |
Rabin Vincent | f0a7a98 | 2010-09-13 13:04:02 +0100 | [diff] [blame] | 349 | if (pdata->remove) |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 350 | pdata->remove(tc3589x, tc3589x_gpio->chip.base); |
Rabin Vincent | f0a7a98 | 2010-09-13 13:04:02 +0100 | [diff] [blame] | 351 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 352 | ret = gpiochip_remove(&tc3589x_gpio->chip); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 353 | if (ret < 0) { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 354 | dev_err(tc3589x_gpio->dev, |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 355 | "unable to remove gpiochip: %d\n", ret); |
| 356 | return ret; |
| 357 | } |
| 358 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 359 | free_irq(irq, tc3589x_gpio); |
| 360 | tc3589x_gpio_irq_remove(tc3589x_gpio); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 361 | |
| 362 | platform_set_drvdata(pdev, NULL); |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 363 | kfree(tc3589x_gpio); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 364 | |
| 365 | return 0; |
| 366 | } |
| 367 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 368 | static struct platform_driver tc3589x_gpio_driver = { |
| 369 | .driver.name = "tc3589x-gpio", |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 370 | .driver.owner = THIS_MODULE, |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 371 | .probe = tc3589x_gpio_probe, |
| 372 | .remove = __devexit_p(tc3589x_gpio_remove), |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 373 | }; |
| 374 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 375 | static int __init tc3589x_gpio_init(void) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 376 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 377 | return platform_driver_register(&tc3589x_gpio_driver); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 378 | } |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 379 | subsys_initcall(tc3589x_gpio_init); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 380 | |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 381 | static void __exit tc3589x_gpio_exit(void) |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 382 | { |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 383 | platform_driver_unregister(&tc3589x_gpio_driver); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 384 | } |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 385 | module_exit(tc3589x_gpio_exit); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 386 | |
| 387 | MODULE_LICENSE("GPL v2"); |
Sundar Iyer | 20406eb | 2010-12-13 09:33:14 +0530 | [diff] [blame] | 388 | MODULE_DESCRIPTION("TC3589x GPIO driver"); |
Rabin Vincent | d88b25b | 2010-05-10 23:43:47 +0200 | [diff] [blame] | 389 | MODULE_AUTHOR("Hanumath Prasad, Rabin Vincent"); |