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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 | /* * MPC52xx gpio driver * * Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/of.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/of_gpio.h> #include <linux/io.h> #include <linux/of_platform.h> #include <linux/module.h> #include <asm/mpc52xx.h> #include <sysdev/fsl_soc.h> static DEFINE_SPINLOCK(gpio_lock); struct mpc52xx_gpiochip { struct of_mm_gpio_chip mmchip; unsigned int shadow_dvo; unsigned int shadow_gpioe; unsigned int shadow_ddr; }; /* * GPIO LIB API implementation for wakeup GPIOs. * * There's a maximum of 8 wakeup GPIOs. Which of these are available * for use depends on your board setup. * * 0 -> GPIO_WKUP_7 * 1 -> GPIO_WKUP_6 * 2 -> PSC6_1 * 3 -> PSC6_0 * 4 -> ETH_17 * 5 -> PSC3_9 * 6 -> PSC2_4 * 7 -> PSC1_4 * */ static int mpc52xx_wkup_gpio_get(struct gpio_chip *gc, unsigned int gpio) { struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs; unsigned int ret; ret = (in_8(®s->wkup_ival) >> (7 - gpio)) & 1; pr_debug("%s: gpio: %d ret: %d\n", __func__, gpio, ret); return ret; } static inline void __mpc52xx_wkup_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val) { struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); struct mpc52xx_gpiochip *chip = gpiochip_get_data(gc); struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs; if (val) chip->shadow_dvo |= 1 << (7 - gpio); else chip->shadow_dvo &= ~(1 << (7 - gpio)); out_8(®s->wkup_dvo, chip->shadow_dvo); } static void mpc52xx_wkup_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val) { unsigned long flags; spin_lock_irqsave(&gpio_lock, flags); __mpc52xx_wkup_gpio_set(gc, gpio, val); spin_unlock_irqrestore(&gpio_lock, flags); pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val); } static int mpc52xx_wkup_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio) { struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); struct mpc52xx_gpiochip *chip = gpiochip_get_data(gc); struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs; unsigned long flags; spin_lock_irqsave(&gpio_lock, flags); /* set the direction */ chip->shadow_ddr &= ~(1 << (7 - gpio)); out_8(®s->wkup_ddr, chip->shadow_ddr); /* and enable the pin */ chip->shadow_gpioe |= 1 << (7 - gpio); out_8(®s->wkup_gpioe, chip->shadow_gpioe); spin_unlock_irqrestore(&gpio_lock, flags); return 0; } static int mpc52xx_wkup_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val) { struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); struct mpc52xx_gpio_wkup __iomem *regs = mm_gc->regs; struct mpc52xx_gpiochip *chip = gpiochip_get_data(gc); unsigned long flags; spin_lock_irqsave(&gpio_lock, flags); __mpc52xx_wkup_gpio_set(gc, gpio, val); /* Then set direction */ chip->shadow_ddr |= 1 << (7 - gpio); out_8(®s->wkup_ddr, chip->shadow_ddr); /* Finally enable the pin */ chip->shadow_gpioe |= 1 << (7 - gpio); out_8(®s->wkup_gpioe, chip->shadow_gpioe); spin_unlock_irqrestore(&gpio_lock, flags); pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val); return 0; } static int mpc52xx_wkup_gpiochip_probe(struct platform_device *ofdev) { struct mpc52xx_gpiochip *chip; struct mpc52xx_gpio_wkup __iomem *regs; struct gpio_chip *gc; int ret; chip = devm_kzalloc(&ofdev->dev, sizeof(*chip), GFP_KERNEL); if (!chip) return -ENOMEM; platform_set_drvdata(ofdev, chip); gc = &chip->mmchip.gc; gc->ngpio = 8; gc->direction_input = mpc52xx_wkup_gpio_dir_in; gc->direction_output = mpc52xx_wkup_gpio_dir_out; gc->get = mpc52xx_wkup_gpio_get; gc->set = mpc52xx_wkup_gpio_set; ret = of_mm_gpiochip_add_data(ofdev->dev.of_node, &chip->mmchip, chip); if (ret) return ret; regs = chip->mmchip.regs; chip->shadow_gpioe = in_8(®s->wkup_gpioe); chip->shadow_ddr = in_8(®s->wkup_ddr); chip->shadow_dvo = in_8(®s->wkup_dvo); return 0; } static int mpc52xx_gpiochip_remove(struct platform_device *ofdev) { struct mpc52xx_gpiochip *chip = platform_get_drvdata(ofdev); of_mm_gpiochip_remove(&chip->mmchip); return 0; } static const struct of_device_id mpc52xx_wkup_gpiochip_match[] = { { .compatible = "fsl,mpc5200-gpio-wkup", }, {} }; static struct platform_driver mpc52xx_wkup_gpiochip_driver = { .driver = { .name = "mpc5200-gpio-wkup", .of_match_table = mpc52xx_wkup_gpiochip_match, }, .probe = mpc52xx_wkup_gpiochip_probe, .remove = mpc52xx_gpiochip_remove, }; /* * GPIO LIB API implementation for simple GPIOs * * There's a maximum of 32 simple GPIOs. Which of these are available * for use depends on your board setup. * The numbering reflects the bit numbering in the port registers: * * 0..1 > reserved * 2..3 > IRDA * 4..7 > ETHR * 8..11 > reserved * 12..15 > USB * 16..17 > reserved * 18..23 > PSC3 * 24..27 > PSC2 * 28..31 > PSC1 */ static int mpc52xx_simple_gpio_get(struct gpio_chip *gc, unsigned int gpio) { struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); struct mpc52xx_gpio __iomem *regs = mm_gc->regs; unsigned int ret; ret = (in_be32(®s->simple_ival) >> (31 - gpio)) & 1; return ret; } static inline void __mpc52xx_simple_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val) { struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); struct mpc52xx_gpiochip *chip = gpiochip_get_data(gc); struct mpc52xx_gpio __iomem *regs = mm_gc->regs; if (val) chip->shadow_dvo |= 1 << (31 - gpio); else chip->shadow_dvo &= ~(1 << (31 - gpio)); out_be32(®s->simple_dvo, chip->shadow_dvo); } static void mpc52xx_simple_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val) { unsigned long flags; spin_lock_irqsave(&gpio_lock, flags); __mpc52xx_simple_gpio_set(gc, gpio, val); spin_unlock_irqrestore(&gpio_lock, flags); pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val); } static int mpc52xx_simple_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio) { struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); struct mpc52xx_gpiochip *chip = gpiochip_get_data(gc); struct mpc52xx_gpio __iomem *regs = mm_gc->regs; unsigned long flags; spin_lock_irqsave(&gpio_lock, flags); /* set the direction */ chip->shadow_ddr &= ~(1 << (31 - gpio)); out_be32(®s->simple_ddr, chip->shadow_ddr); /* and enable the pin */ chip->shadow_gpioe |= 1 << (31 - gpio); out_be32(®s->simple_gpioe, chip->shadow_gpioe); spin_unlock_irqrestore(&gpio_lock, flags); return 0; } static int mpc52xx_simple_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val) { struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc); struct mpc52xx_gpiochip *chip = gpiochip_get_data(gc); struct mpc52xx_gpio __iomem *regs = mm_gc->regs; unsigned long flags; spin_lock_irqsave(&gpio_lock, flags); /* First set initial value */ __mpc52xx_simple_gpio_set(gc, gpio, val); /* Then set direction */ chip->shadow_ddr |= 1 << (31 - gpio); out_be32(®s->simple_ddr, chip->shadow_ddr); /* Finally enable the pin */ chip->shadow_gpioe |= 1 << (31 - gpio); out_be32(®s->simple_gpioe, chip->shadow_gpioe); spin_unlock_irqrestore(&gpio_lock, flags); pr_debug("%s: gpio: %d val: %d\n", __func__, gpio, val); return 0; } static int mpc52xx_simple_gpiochip_probe(struct platform_device *ofdev) { struct mpc52xx_gpiochip *chip; struct gpio_chip *gc; struct mpc52xx_gpio __iomem *regs; int ret; chip = devm_kzalloc(&ofdev->dev, sizeof(*chip), GFP_KERNEL); if (!chip) return -ENOMEM; platform_set_drvdata(ofdev, chip); gc = &chip->mmchip.gc; gc->ngpio = 32; gc->direction_input = mpc52xx_simple_gpio_dir_in; gc->direction_output = mpc52xx_simple_gpio_dir_out; gc->get = mpc52xx_simple_gpio_get; gc->set = mpc52xx_simple_gpio_set; ret = of_mm_gpiochip_add_data(ofdev->dev.of_node, &chip->mmchip, chip); if (ret) return ret; regs = chip->mmchip.regs; chip->shadow_gpioe = in_be32(®s->simple_gpioe); chip->shadow_ddr = in_be32(®s->simple_ddr); chip->shadow_dvo = in_be32(®s->simple_dvo); return 0; } static const struct of_device_id mpc52xx_simple_gpiochip_match[] = { { .compatible = "fsl,mpc5200-gpio", }, {} }; static struct platform_driver mpc52xx_simple_gpiochip_driver = { .driver = { .name = "mpc5200-gpio", .of_match_table = mpc52xx_simple_gpiochip_match, }, .probe = mpc52xx_simple_gpiochip_probe, .remove = mpc52xx_gpiochip_remove, }; static struct platform_driver * const drivers[] = { &mpc52xx_wkup_gpiochip_driver, &mpc52xx_simple_gpiochip_driver, }; static int __init mpc52xx_gpio_init(void) { return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); } /* Make sure we get initialised before anyone else tries to use us */ subsys_initcall(mpc52xx_gpio_init); static void __exit mpc52xx_gpio_exit(void) { platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); } module_exit(mpc52xx_gpio_exit); MODULE_DESCRIPTION("Freescale MPC52xx gpio driver"); MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de"); MODULE_LICENSE("GPL v2"); |