Ben Skeggs | a0b2563 | 2011-11-21 16:41:48 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2011 Red Hat Inc. |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice shall be included in |
| 12 | * all copies or substantial portions of the Software. |
| 13 | * |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 20 | * OTHER DEALINGS IN THE SOFTWARE. |
| 21 | * |
| 22 | * Authors: Ben Skeggs |
| 23 | */ |
| 24 | |
| 25 | #include "drmP.h" |
| 26 | #include "nouveau_drv.h" |
| 27 | #include "nouveau_i2c.h" |
| 28 | #include "nouveau_gpio.h" |
| 29 | |
| 30 | static u8 * |
| 31 | dcb_gpio_table(struct drm_device *dev) |
| 32 | { |
| 33 | u8 *dcb = dcb_table(dev); |
| 34 | if (dcb) { |
| 35 | if (dcb[0] >= 0x30 && dcb[1] >= 0x0c) |
| 36 | return ROMPTR(dev, dcb[0x0a]); |
| 37 | if (dcb[0] >= 0x22 && dcb[-1] >= 0x13) |
| 38 | return ROMPTR(dev, dcb[-15]); |
| 39 | } |
| 40 | return NULL; |
| 41 | } |
| 42 | |
| 43 | static u8 * |
| 44 | dcb_gpio_entry(struct drm_device *dev, int idx, int ent, u8 *version) |
| 45 | { |
| 46 | u8 *table = dcb_gpio_table(dev); |
| 47 | if (table) { |
| 48 | *version = table[0]; |
| 49 | if (*version < 0x30 && ent < table[2]) |
| 50 | return table + 3 + (ent * table[1]); |
| 51 | else if (ent < table[2]) |
| 52 | return table + table[1] + (ent * table[3]); |
| 53 | } |
| 54 | return NULL; |
| 55 | } |
| 56 | |
| 57 | int |
| 58 | nouveau_gpio_drive(struct drm_device *dev, int idx, int line, int dir, int out) |
| 59 | { |
| 60 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
| 61 | struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; |
| 62 | |
| 63 | return pgpio->drive ? pgpio->drive(dev, line, dir, out) : -ENODEV; |
| 64 | } |
| 65 | |
| 66 | int |
| 67 | nouveau_gpio_sense(struct drm_device *dev, int idx, int line) |
| 68 | { |
| 69 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
| 70 | struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; |
| 71 | |
| 72 | return pgpio->sense ? pgpio->sense(dev, line) : -ENODEV; |
| 73 | } |
| 74 | |
| 75 | int |
| 76 | nouveau_gpio_find(struct drm_device *dev, int idx, u8 func, u8 line, |
| 77 | struct gpio_func *gpio) |
| 78 | { |
| 79 | u8 *table, *entry, version; |
| 80 | int i = -1; |
| 81 | |
| 82 | if (line == 0xff && func == 0xff) |
| 83 | return -EINVAL; |
| 84 | |
| 85 | while ((entry = dcb_gpio_entry(dev, idx, ++i, &version))) { |
| 86 | if (version < 0x40) { |
| 87 | u16 data = ROM16(entry[0]); |
| 88 | *gpio = (struct gpio_func) { |
| 89 | .line = (data & 0x001f) >> 0, |
| 90 | .func = (data & 0x07e0) >> 5, |
| 91 | .log[0] = (data & 0x1800) >> 11, |
| 92 | .log[1] = (data & 0x6000) >> 13, |
| 93 | }; |
| 94 | } else |
| 95 | if (version < 0x41) { |
| 96 | *gpio = (struct gpio_func) { |
| 97 | .line = entry[0] & 0x1f, |
| 98 | .func = entry[1], |
| 99 | .log[0] = (entry[3] & 0x18) >> 3, |
| 100 | .log[1] = (entry[3] & 0x60) >> 5, |
| 101 | }; |
| 102 | } else { |
| 103 | *gpio = (struct gpio_func) { |
| 104 | .line = entry[0] & 0x3f, |
| 105 | .func = entry[1], |
| 106 | .log[0] = (entry[4] & 0x30) >> 4, |
| 107 | .log[1] = (entry[4] & 0xc0) >> 6, |
| 108 | }; |
| 109 | } |
| 110 | |
| 111 | if ((line == 0xff || line == gpio->line) && |
| 112 | (func == 0xff || func == gpio->func)) |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | /* DCB 2.2, fixed TVDAC GPIO data */ |
| 117 | if ((table = dcb_table(dev)) && table[0] >= 0x22) { |
| 118 | if (func == DCB_GPIO_TVDAC0) { |
| 119 | *gpio = (struct gpio_func) { |
| 120 | .func = DCB_GPIO_TVDAC0, |
| 121 | .line = table[-4] >> 4, |
| 122 | .log[0] = !!(table[-5] & 2), |
| 123 | .log[1] = !(table[-5] & 2), |
| 124 | }; |
| 125 | return 0; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | /* Apple iMac G4 NV18 */ |
| 130 | if (nv_match_device(dev, 0x0189, 0x10de, 0x0010)) { |
| 131 | if (func == DCB_GPIO_TVDAC0) { |
| 132 | *gpio = (struct gpio_func) { |
| 133 | .func = DCB_GPIO_TVDAC0, |
| 134 | .line = 4, |
| 135 | .log[0] = 0, |
| 136 | .log[1] = 1, |
| 137 | }; |
| 138 | return 0; |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | return -EINVAL; |
| 143 | } |
| 144 | |
| 145 | int |
| 146 | nouveau_gpio_set(struct drm_device *dev, int idx, u8 tag, u8 line, int state) |
| 147 | { |
| 148 | struct gpio_func gpio; |
| 149 | int ret; |
| 150 | |
| 151 | ret = nouveau_gpio_find(dev, idx, tag, line, &gpio); |
| 152 | if (ret == 0) { |
| 153 | int dir = !!(gpio.log[state] & 0x02); |
| 154 | int out = !!(gpio.log[state] & 0x01); |
| 155 | ret = nouveau_gpio_drive(dev, idx, gpio.line, dir, out); |
| 156 | } |
| 157 | |
| 158 | return ret; |
| 159 | } |
| 160 | |
| 161 | int |
| 162 | nouveau_gpio_get(struct drm_device *dev, int idx, u8 tag, u8 line) |
| 163 | { |
| 164 | struct gpio_func gpio; |
| 165 | int ret; |
| 166 | |
| 167 | ret = nouveau_gpio_find(dev, idx, tag, line, &gpio); |
| 168 | if (ret == 0) { |
| 169 | ret = nouveau_gpio_sense(dev, idx, gpio.line); |
| 170 | if (ret >= 0) |
| 171 | ret = (ret == (gpio.log[1] & 1)); |
| 172 | } |
| 173 | |
| 174 | return ret; |
| 175 | } |
| 176 | |
| 177 | int |
| 178 | nouveau_gpio_irq(struct drm_device *dev, int idx, u8 tag, u8 line, bool on) |
| 179 | { |
| 180 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
| 181 | struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; |
| 182 | struct gpio_func gpio; |
| 183 | int ret; |
| 184 | |
| 185 | ret = nouveau_gpio_find(dev, idx, tag, line, &gpio); |
| 186 | if (ret == 0) { |
| 187 | if (idx == 0 && pgpio->irq_enable) |
| 188 | pgpio->irq_enable(dev, gpio.line, on); |
| 189 | else |
| 190 | ret = -ENODEV; |
| 191 | } |
| 192 | |
| 193 | return ret; |
| 194 | } |
| 195 | |
| 196 | struct gpio_isr { |
| 197 | struct drm_device *dev; |
| 198 | struct list_head head; |
| 199 | struct work_struct work; |
| 200 | int idx; |
| 201 | struct gpio_func func; |
| 202 | void (*handler)(void *, int); |
| 203 | void *data; |
| 204 | bool inhibit; |
| 205 | }; |
| 206 | |
| 207 | static void |
| 208 | nouveau_gpio_isr_bh(struct work_struct *work) |
| 209 | { |
| 210 | struct gpio_isr *isr = container_of(work, struct gpio_isr, work); |
| 211 | struct drm_device *dev = isr->dev; |
| 212 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
| 213 | struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; |
| 214 | unsigned long flags; |
| 215 | int state; |
| 216 | |
| 217 | state = nouveau_gpio_get(dev, isr->idx, isr->func.func, isr->func.line); |
| 218 | if (state >= 0) |
| 219 | isr->handler(isr->data, state); |
| 220 | |
| 221 | spin_lock_irqsave(&pgpio->lock, flags); |
| 222 | isr->inhibit = false; |
| 223 | spin_unlock_irqrestore(&pgpio->lock, flags); |
| 224 | } |
| 225 | |
| 226 | void |
| 227 | nouveau_gpio_isr(struct drm_device *dev, int idx, u32 line_mask) |
| 228 | { |
| 229 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
| 230 | struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; |
| 231 | struct gpio_isr *isr; |
| 232 | |
| 233 | if (idx != 0) |
| 234 | return; |
| 235 | |
| 236 | spin_lock(&pgpio->lock); |
| 237 | list_for_each_entry(isr, &pgpio->isr, head) { |
| 238 | if (line_mask & (1 << isr->func.line)) { |
| 239 | if (isr->inhibit) |
| 240 | continue; |
| 241 | isr->inhibit = true; |
| 242 | schedule_work(&isr->work); |
| 243 | } |
| 244 | } |
| 245 | spin_unlock(&pgpio->lock); |
| 246 | } |
| 247 | |
| 248 | int |
| 249 | nouveau_gpio_isr_add(struct drm_device *dev, int idx, u8 tag, u8 line, |
| 250 | void (*handler)(void *, int), void *data) |
| 251 | { |
| 252 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
| 253 | struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; |
| 254 | struct gpio_isr *isr; |
| 255 | unsigned long flags; |
| 256 | int ret; |
| 257 | |
| 258 | isr = kzalloc(sizeof(*isr), GFP_KERNEL); |
| 259 | if (!isr) |
| 260 | return -ENOMEM; |
| 261 | |
| 262 | ret = nouveau_gpio_find(dev, idx, tag, line, &isr->func); |
| 263 | if (ret) { |
| 264 | kfree(isr); |
| 265 | return ret; |
| 266 | } |
| 267 | |
| 268 | INIT_WORK(&isr->work, nouveau_gpio_isr_bh); |
| 269 | isr->dev = dev; |
| 270 | isr->handler = handler; |
| 271 | isr->data = data; |
| 272 | isr->idx = idx; |
| 273 | |
| 274 | spin_lock_irqsave(&pgpio->lock, flags); |
| 275 | list_add(&isr->head, &pgpio->isr); |
| 276 | spin_unlock_irqrestore(&pgpio->lock, flags); |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | void |
| 281 | nouveau_gpio_isr_del(struct drm_device *dev, int idx, u8 tag, u8 line, |
| 282 | void (*handler)(void *, int), void *data) |
| 283 | { |
| 284 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
| 285 | struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; |
| 286 | struct gpio_isr *isr, *tmp; |
| 287 | struct gpio_func func; |
| 288 | unsigned long flags; |
| 289 | LIST_HEAD(tofree); |
| 290 | int ret; |
| 291 | |
| 292 | ret = nouveau_gpio_find(dev, idx, tag, line, &func); |
| 293 | if (ret == 0) { |
| 294 | spin_lock_irqsave(&pgpio->lock, flags); |
| 295 | list_for_each_entry_safe(isr, tmp, &pgpio->isr, head) { |
| 296 | if (memcmp(&isr->func, &func, sizeof(func)) || |
| 297 | isr->idx != idx || |
| 298 | isr->handler != handler || isr->data != data) |
| 299 | continue; |
| 300 | list_move(&isr->head, &tofree); |
| 301 | } |
| 302 | spin_unlock_irqrestore(&pgpio->lock, flags); |
| 303 | |
| 304 | list_for_each_entry_safe(isr, tmp, &tofree, head) { |
| 305 | flush_work_sync(&isr->work); |
| 306 | kfree(isr); |
| 307 | } |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | int |
| 312 | nouveau_gpio_create(struct drm_device *dev) |
| 313 | { |
| 314 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
| 315 | struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; |
| 316 | |
| 317 | INIT_LIST_HEAD(&pgpio->isr); |
| 318 | spin_lock_init(&pgpio->lock); |
| 319 | |
| 320 | return nouveau_gpio_init(dev); |
| 321 | } |
| 322 | |
| 323 | void |
| 324 | nouveau_gpio_destroy(struct drm_device *dev) |
| 325 | { |
| 326 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
| 327 | struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; |
| 328 | |
| 329 | nouveau_gpio_fini(dev); |
| 330 | BUG_ON(!list_empty(&pgpio->isr)); |
| 331 | } |
| 332 | |
| 333 | int |
| 334 | nouveau_gpio_init(struct drm_device *dev) |
| 335 | { |
| 336 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
| 337 | struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; |
| 338 | int ret = 0; |
| 339 | |
| 340 | if (pgpio->init) |
| 341 | ret = pgpio->init(dev); |
| 342 | |
| 343 | return ret; |
| 344 | } |
| 345 | |
| 346 | void |
| 347 | nouveau_gpio_fini(struct drm_device *dev) |
| 348 | { |
| 349 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
| 350 | struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; |
| 351 | |
| 352 | if (pgpio->fini) |
| 353 | pgpio->fini(dev); |
| 354 | } |
| 355 | |
| 356 | void |
| 357 | nouveau_gpio_reset(struct drm_device *dev) |
| 358 | { |
| 359 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
| 360 | u8 *entry, version; |
| 361 | int ent = -1; |
| 362 | |
| 363 | while ((entry = dcb_gpio_entry(dev, 0, ++ent, &version))) { |
| 364 | u8 func = 0xff, line, defs, unk0, unk1; |
| 365 | if (version >= 0x41) { |
| 366 | defs = !!(entry[0] & 0x80); |
| 367 | line = entry[0] & 0x3f; |
| 368 | func = entry[1]; |
| 369 | unk0 = entry[2]; |
| 370 | unk1 = entry[3] & 0x1f; |
| 371 | } else |
| 372 | if (version >= 0x40) { |
| 373 | line = entry[0] & 0x1f; |
| 374 | func = entry[1]; |
| 375 | defs = !!(entry[3] & 0x01); |
| 376 | unk0 = !!(entry[3] & 0x02); |
| 377 | unk1 = !!(entry[3] & 0x04); |
| 378 | } else { |
| 379 | break; |
| 380 | } |
| 381 | |
| 382 | if (func == 0xff) |
| 383 | continue; |
| 384 | |
| 385 | nouveau_gpio_func_set(dev, func, defs); |
| 386 | |
| 387 | if (dev_priv->card_type >= NV_D0) { |
| 388 | nv_mask(dev, 0x00d610 + (line * 4), 0xff, unk0); |
| 389 | if (unk1--) |
| 390 | nv_mask(dev, 0x00d640 + (unk1 * 4), 0xff, line); |
| 391 | } else |
| 392 | if (dev_priv->card_type >= NV_50) { |
| 393 | static const u32 regs[] = { 0xe100, 0xe28c }; |
| 394 | u32 val = (unk1 << 16) | unk0; |
| 395 | u32 reg = regs[line >> 4]; line &= 0x0f; |
| 396 | |
| 397 | nv_mask(dev, reg, 0x00010001 << line, val << line); |
| 398 | } |
| 399 | } |
| 400 | } |