Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1 | /* linux/drivers/mfd/sm501.c |
| 2 | * |
| 3 | * Copyright (C) 2006 Simtec Electronics |
| 4 | * Ben Dooks <ben@simtec.co.uk> |
| 5 | * Vincent Sanders <vince@simtec.co.uk> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * SM501 MFD driver |
| 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/list.h> |
| 19 | #include <linux/device.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/pci.h> |
| 22 | |
| 23 | #include <linux/sm501.h> |
| 24 | #include <linux/sm501-regs.h> |
| 25 | |
| 26 | #include <asm/io.h> |
| 27 | |
| 28 | struct sm501_device { |
| 29 | struct list_head list; |
| 30 | struct platform_device pdev; |
| 31 | }; |
| 32 | |
| 33 | struct sm501_devdata { |
| 34 | spinlock_t reg_lock; |
| 35 | struct mutex clock_lock; |
| 36 | struct list_head devices; |
| 37 | |
| 38 | struct device *dev; |
| 39 | struct resource *io_res; |
| 40 | struct resource *mem_res; |
| 41 | struct resource *regs_claim; |
| 42 | struct sm501_platdata *platdata; |
| 43 | |
| 44 | int unit_power[20]; |
| 45 | unsigned int pdev_id; |
| 46 | unsigned int irq; |
| 47 | void __iomem *regs; |
| 48 | }; |
| 49 | |
| 50 | #define MHZ (1000 * 1000) |
| 51 | |
| 52 | #ifdef DEBUG |
| 53 | static const unsigned int misc_div[] = { |
| 54 | [0] = 1, |
| 55 | [1] = 2, |
| 56 | [2] = 4, |
| 57 | [3] = 8, |
| 58 | [4] = 16, |
| 59 | [5] = 32, |
| 60 | [6] = 64, |
| 61 | [7] = 128, |
| 62 | [8] = 3, |
| 63 | [9] = 6, |
| 64 | [10] = 12, |
| 65 | [11] = 24, |
| 66 | [12] = 48, |
| 67 | [13] = 96, |
| 68 | [14] = 192, |
| 69 | [15] = 384, |
| 70 | }; |
| 71 | |
| 72 | static const unsigned int px_div[] = { |
| 73 | [0] = 1, |
| 74 | [1] = 2, |
| 75 | [2] = 4, |
| 76 | [3] = 8, |
| 77 | [4] = 16, |
| 78 | [5] = 32, |
| 79 | [6] = 64, |
| 80 | [7] = 128, |
| 81 | [8] = 3, |
| 82 | [9] = 6, |
| 83 | [10] = 12, |
| 84 | [11] = 24, |
| 85 | [12] = 48, |
| 86 | [13] = 96, |
| 87 | [14] = 192, |
| 88 | [15] = 384, |
| 89 | [16] = 5, |
| 90 | [17] = 10, |
| 91 | [18] = 20, |
| 92 | [19] = 40, |
| 93 | [20] = 80, |
| 94 | [21] = 160, |
| 95 | [22] = 320, |
| 96 | [23] = 604, |
| 97 | }; |
| 98 | |
| 99 | static unsigned long decode_div(unsigned long pll2, unsigned long val, |
| 100 | unsigned int lshft, unsigned int selbit, |
| 101 | unsigned long mask, const unsigned int *dtab) |
| 102 | { |
| 103 | if (val & selbit) |
| 104 | pll2 = 288 * MHZ; |
| 105 | |
| 106 | return pll2 / dtab[(val >> lshft) & mask]; |
| 107 | } |
| 108 | |
| 109 | #define fmt_freq(x) ((x) / MHZ), ((x) % MHZ), (x) |
| 110 | |
| 111 | /* sm501_dump_clk |
| 112 | * |
| 113 | * Print out the current clock configuration for the device |
| 114 | */ |
| 115 | |
| 116 | static void sm501_dump_clk(struct sm501_devdata *sm) |
| 117 | { |
| 118 | unsigned long misct = readl(sm->regs + SM501_MISC_TIMING); |
| 119 | unsigned long pm0 = readl(sm->regs + SM501_POWER_MODE_0_CLOCK); |
| 120 | unsigned long pm1 = readl(sm->regs + SM501_POWER_MODE_1_CLOCK); |
| 121 | unsigned long pmc = readl(sm->regs + SM501_POWER_MODE_CONTROL); |
| 122 | unsigned long sdclk0, sdclk1; |
| 123 | unsigned long pll2 = 0; |
| 124 | |
| 125 | switch (misct & 0x30) { |
| 126 | case 0x00: |
| 127 | pll2 = 336 * MHZ; |
| 128 | break; |
| 129 | case 0x10: |
| 130 | pll2 = 288 * MHZ; |
| 131 | break; |
| 132 | case 0x20: |
| 133 | pll2 = 240 * MHZ; |
| 134 | break; |
| 135 | case 0x30: |
| 136 | pll2 = 192 * MHZ; |
| 137 | break; |
| 138 | } |
| 139 | |
| 140 | sdclk0 = (misct & (1<<12)) ? pll2 : 288 * MHZ; |
| 141 | sdclk0 /= misc_div[((misct >> 8) & 0xf)]; |
| 142 | |
| 143 | sdclk1 = (misct & (1<<20)) ? pll2 : 288 * MHZ; |
| 144 | sdclk1 /= misc_div[((misct >> 16) & 0xf)]; |
| 145 | |
| 146 | dev_dbg(sm->dev, "MISCT=%08lx, PM0=%08lx, PM1=%08lx\n", |
| 147 | misct, pm0, pm1); |
| 148 | |
| 149 | dev_dbg(sm->dev, "PLL2 = %ld.%ld MHz (%ld), SDCLK0=%08lx, SDCLK1=%08lx\n", |
| 150 | fmt_freq(pll2), sdclk0, sdclk1); |
| 151 | |
| 152 | dev_dbg(sm->dev, "SDRAM: PM0=%ld, PM1=%ld\n", sdclk0, sdclk1); |
| 153 | |
| 154 | dev_dbg(sm->dev, "PM0[%c]: " |
| 155 | "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), " |
| 156 | x "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n", |
| 157 | (pmc & 3 ) == 0 ? '*' : '-', |
| 158 | fmt_freq(decode_div(pll2, pm0, 24, 1<<29, 31, px_div)), |
| 159 | fmt_freq(decode_div(pll2, pm0, 16, 1<<20, 15, misc_div)), |
| 160 | fmt_freq(decode_div(pll2, pm0, 8, 1<<12, 15, misc_div)), |
| 161 | fmt_freq(decode_div(pll2, pm0, 0, 1<<4, 15, misc_div))); |
| 162 | |
| 163 | dev_dbg(sm->dev, "PM1[%c]: " |
| 164 | "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), " |
| 165 | "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n", |
| 166 | (pmc & 3 ) == 1 ? '*' : '-', |
| 167 | fmt_freq(decode_div(pll2, pm1, 24, 1<<29, 31, px_div)), |
| 168 | fmt_freq(decode_div(pll2, pm1, 16, 1<<20, 15, misc_div)), |
| 169 | fmt_freq(decode_div(pll2, pm1, 8, 1<<12, 15, misc_div)), |
| 170 | fmt_freq(decode_div(pll2, pm1, 0, 1<<4, 15, misc_div))); |
| 171 | } |
| 172 | #else |
| 173 | static void sm501_dump_clk(struct sm501_devdata *sm) |
| 174 | { |
| 175 | } |
| 176 | #endif |
| 177 | |
| 178 | /* sm501_sync_regs |
| 179 | * |
| 180 | * ensure the |
| 181 | */ |
| 182 | |
| 183 | static void sm501_sync_regs(struct sm501_devdata *sm) |
| 184 | { |
| 185 | readl(sm->regs); |
| 186 | } |
| 187 | |
| 188 | /* sm501_misc_control |
| 189 | * |
| 190 | * alters the misceleneous control parameters |
| 191 | */ |
| 192 | |
| 193 | int sm501_misc_control(struct device *dev, |
| 194 | unsigned long set, unsigned long clear) |
| 195 | { |
| 196 | struct sm501_devdata *sm = dev_get_drvdata(dev); |
| 197 | unsigned long misc; |
| 198 | unsigned long save; |
| 199 | unsigned long to; |
| 200 | |
| 201 | spin_lock_irqsave(&sm->reg_lock, save); |
| 202 | |
| 203 | misc = readl(sm->regs + SM501_MISC_CONTROL); |
| 204 | to = (misc & ~clear) | set; |
| 205 | |
| 206 | if (to != misc) { |
| 207 | writel(to, sm->regs + SM501_MISC_CONTROL); |
| 208 | sm501_sync_regs(sm); |
| 209 | |
| 210 | dev_dbg(sm->dev, "MISC_CONTROL %08lx\n", misc); |
| 211 | } |
| 212 | |
| 213 | spin_unlock_irqrestore(&sm->reg_lock, save); |
| 214 | return to; |
| 215 | } |
| 216 | |
| 217 | EXPORT_SYMBOL_GPL(sm501_misc_control); |
| 218 | |
| 219 | /* sm501_modify_reg |
| 220 | * |
| 221 | * Modify a register in the SM501 which may be shared with other |
| 222 | * drivers. |
| 223 | */ |
| 224 | |
| 225 | unsigned long sm501_modify_reg(struct device *dev, |
| 226 | unsigned long reg, |
| 227 | unsigned long set, |
| 228 | unsigned long clear) |
| 229 | { |
| 230 | struct sm501_devdata *sm = dev_get_drvdata(dev); |
| 231 | unsigned long data; |
| 232 | unsigned long save; |
| 233 | |
| 234 | spin_lock_irqsave(&sm->reg_lock, save); |
| 235 | |
| 236 | data = readl(sm->regs + reg); |
| 237 | data |= set; |
| 238 | data &= ~clear; |
| 239 | |
| 240 | writel(data, sm->regs + reg); |
| 241 | sm501_sync_regs(sm); |
| 242 | |
| 243 | spin_unlock_irqrestore(&sm->reg_lock, save); |
| 244 | |
| 245 | return data; |
| 246 | } |
| 247 | |
| 248 | EXPORT_SYMBOL_GPL(sm501_modify_reg); |
| 249 | |
| 250 | unsigned long sm501_gpio_get(struct device *dev, |
| 251 | unsigned long gpio) |
| 252 | { |
| 253 | struct sm501_devdata *sm = dev_get_drvdata(dev); |
| 254 | unsigned long result; |
| 255 | unsigned long reg; |
| 256 | |
| 257 | reg = (gpio > 32) ? SM501_GPIO_DATA_HIGH : SM501_GPIO_DATA_LOW; |
| 258 | result = readl(sm->regs + reg); |
| 259 | |
| 260 | result >>= (gpio & 31); |
| 261 | return result & 1UL; |
| 262 | } |
| 263 | |
| 264 | EXPORT_SYMBOL_GPL(sm501_gpio_get); |
| 265 | |
| 266 | void sm501_gpio_set(struct device *dev, |
| 267 | unsigned long gpio, |
| 268 | unsigned int to, |
| 269 | unsigned int dir) |
| 270 | { |
| 271 | struct sm501_devdata *sm = dev_get_drvdata(dev); |
| 272 | |
| 273 | unsigned long bit = 1 << (gpio & 31); |
| 274 | unsigned long base; |
| 275 | unsigned long save; |
| 276 | unsigned long val; |
| 277 | |
| 278 | base = (gpio > 32) ? SM501_GPIO_DATA_HIGH : SM501_GPIO_DATA_LOW; |
| 279 | base += SM501_GPIO; |
| 280 | |
| 281 | spin_lock_irqsave(&sm->reg_lock, save); |
| 282 | |
| 283 | val = readl(sm->regs + base) & ~bit; |
| 284 | if (to) |
| 285 | val |= bit; |
| 286 | writel(val, sm->regs + base); |
| 287 | |
| 288 | val = readl(sm->regs + SM501_GPIO_DDR_LOW) & ~bit; |
| 289 | if (dir) |
| 290 | val |= bit; |
| 291 | |
| 292 | writel(val, sm->regs + SM501_GPIO_DDR_LOW); |
| 293 | sm501_sync_regs(sm); |
| 294 | |
| 295 | spin_unlock_irqrestore(&sm->reg_lock, save); |
| 296 | |
| 297 | } |
| 298 | |
| 299 | EXPORT_SYMBOL_GPL(sm501_gpio_set); |
| 300 | |
| 301 | |
| 302 | /* sm501_unit_power |
| 303 | * |
| 304 | * alters the power active gate to set specific units on or off |
| 305 | */ |
| 306 | |
| 307 | int sm501_unit_power(struct device *dev, unsigned int unit, unsigned int to) |
| 308 | { |
| 309 | struct sm501_devdata *sm = dev_get_drvdata(dev); |
| 310 | unsigned long mode; |
| 311 | unsigned long gate; |
| 312 | unsigned long clock; |
| 313 | |
| 314 | mutex_lock(&sm->clock_lock); |
| 315 | |
| 316 | mode = readl(sm->regs + SM501_POWER_MODE_CONTROL); |
| 317 | gate = readl(sm->regs + SM501_CURRENT_GATE); |
| 318 | clock = readl(sm->regs + SM501_CURRENT_CLOCK); |
| 319 | |
| 320 | mode &= 3; /* get current power mode */ |
| 321 | |
Adrian Bunk | bf703c3 | 2007-04-01 23:49:38 -0700 | [diff] [blame] | 322 | if (unit >= ARRAY_SIZE(sm->unit_power)) { |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 323 | dev_err(dev, "%s: bad unit %d\n", __FUNCTION__, unit); |
| 324 | goto already; |
| 325 | } |
| 326 | |
| 327 | dev_dbg(sm->dev, "%s: unit %d, cur %d, to %d\n", __FUNCTION__, unit, |
| 328 | sm->unit_power[unit], to); |
| 329 | |
| 330 | if (to == 0 && sm->unit_power[unit] == 0) { |
| 331 | dev_err(sm->dev, "unit %d is already shutdown\n", unit); |
| 332 | goto already; |
| 333 | } |
| 334 | |
| 335 | sm->unit_power[unit] += to ? 1 : -1; |
| 336 | to = sm->unit_power[unit] ? 1 : 0; |
| 337 | |
| 338 | if (to) { |
| 339 | if (gate & (1 << unit)) |
| 340 | goto already; |
| 341 | gate |= (1 << unit); |
| 342 | } else { |
| 343 | if (!(gate & (1 << unit))) |
| 344 | goto already; |
| 345 | gate &= ~(1 << unit); |
| 346 | } |
| 347 | |
| 348 | switch (mode) { |
| 349 | case 1: |
| 350 | writel(gate, sm->regs + SM501_POWER_MODE_0_GATE); |
| 351 | writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK); |
| 352 | mode = 0; |
| 353 | break; |
| 354 | case 2: |
| 355 | case 0: |
| 356 | writel(gate, sm->regs + SM501_POWER_MODE_1_GATE); |
| 357 | writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK); |
| 358 | mode = 1; |
| 359 | break; |
| 360 | |
| 361 | default: |
| 362 | return -1; |
| 363 | } |
| 364 | |
| 365 | writel(mode, sm->regs + SM501_POWER_MODE_CONTROL); |
| 366 | sm501_sync_regs(sm); |
| 367 | |
| 368 | dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n", |
| 369 | gate, clock, mode); |
| 370 | |
| 371 | msleep(16); |
| 372 | |
| 373 | already: |
| 374 | mutex_unlock(&sm->clock_lock); |
| 375 | return gate; |
| 376 | } |
| 377 | |
| 378 | EXPORT_SYMBOL_GPL(sm501_unit_power); |
| 379 | |
| 380 | |
| 381 | /* Perform a rounded division. */ |
| 382 | static long sm501fb_round_div(long num, long denom) |
| 383 | { |
| 384 | /* n / d + 1 / 2 = (2n + d) / 2d */ |
| 385 | return (2 * num + denom) / (2 * denom); |
| 386 | } |
| 387 | |
| 388 | /* clock value structure. */ |
| 389 | struct sm501_clock { |
| 390 | unsigned long mclk; |
| 391 | int divider; |
| 392 | int shift; |
| 393 | }; |
| 394 | |
| 395 | /* sm501_select_clock |
| 396 | * |
| 397 | * selects nearest discrete clock frequency the SM501 can achive |
| 398 | * the maximum divisor is 3 or 5 |
| 399 | */ |
| 400 | static unsigned long sm501_select_clock(unsigned long freq, |
| 401 | struct sm501_clock *clock, |
| 402 | int max_div) |
| 403 | { |
| 404 | unsigned long mclk; |
| 405 | int divider; |
| 406 | int shift; |
| 407 | long diff; |
| 408 | long best_diff = 999999999; |
| 409 | |
| 410 | /* Try 288MHz and 336MHz clocks. */ |
| 411 | for (mclk = 288000000; mclk <= 336000000; mclk += 48000000) { |
| 412 | /* try dividers 1 and 3 for CRT and for panel, |
| 413 | try divider 5 for panel only.*/ |
| 414 | |
| 415 | for (divider = 1; divider <= max_div; divider += 2) { |
| 416 | /* try all 8 shift values.*/ |
| 417 | for (shift = 0; shift < 8; shift++) { |
| 418 | /* Calculate difference to requested clock */ |
| 419 | diff = sm501fb_round_div(mclk, divider << shift) - freq; |
| 420 | if (diff < 0) |
| 421 | diff = -diff; |
| 422 | |
| 423 | /* If it is less than the current, use it */ |
| 424 | if (diff < best_diff) { |
| 425 | best_diff = diff; |
| 426 | |
| 427 | clock->mclk = mclk; |
| 428 | clock->divider = divider; |
| 429 | clock->shift = shift; |
| 430 | } |
| 431 | } |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | /* Return best clock. */ |
| 436 | return clock->mclk / (clock->divider << clock->shift); |
| 437 | } |
| 438 | |
| 439 | /* sm501_set_clock |
| 440 | * |
| 441 | * set one of the four clock sources to the closest available frequency to |
| 442 | * the one specified |
| 443 | */ |
| 444 | |
| 445 | unsigned long sm501_set_clock(struct device *dev, |
| 446 | int clksrc, |
| 447 | unsigned long req_freq) |
| 448 | { |
| 449 | struct sm501_devdata *sm = dev_get_drvdata(dev); |
| 450 | unsigned long mode = readl(sm->regs + SM501_POWER_MODE_CONTROL); |
| 451 | unsigned long gate = readl(sm->regs + SM501_CURRENT_GATE); |
| 452 | unsigned long clock = readl(sm->regs + SM501_CURRENT_CLOCK); |
| 453 | unsigned char reg; |
| 454 | unsigned long sm501_freq; /* the actual frequency acheived */ |
| 455 | |
| 456 | struct sm501_clock to; |
| 457 | |
| 458 | /* find achivable discrete frequency and setup register value |
| 459 | * accordingly, V2XCLK, MCLK and M1XCLK are the same P2XCLK |
| 460 | * has an extra bit for the divider */ |
| 461 | |
| 462 | switch (clksrc) { |
| 463 | case SM501_CLOCK_P2XCLK: |
| 464 | /* This clock is divided in half so to achive the |
| 465 | * requested frequency the value must be multiplied by |
| 466 | * 2. This clock also has an additional pre divisor */ |
| 467 | |
| 468 | sm501_freq = (sm501_select_clock(2 * req_freq, &to, 5) / 2); |
| 469 | reg=to.shift & 0x07;/* bottom 3 bits are shift */ |
| 470 | if (to.divider == 3) |
| 471 | reg |= 0x08; /* /3 divider required */ |
| 472 | else if (to.divider == 5) |
| 473 | reg |= 0x10; /* /5 divider required */ |
| 474 | if (to.mclk != 288000000) |
| 475 | reg |= 0x20; /* which mclk pll is source */ |
| 476 | break; |
| 477 | |
| 478 | case SM501_CLOCK_V2XCLK: |
| 479 | /* This clock is divided in half so to achive the |
| 480 | * requested frequency the value must be multiplied by 2. */ |
| 481 | |
| 482 | sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2); |
| 483 | reg=to.shift & 0x07; /* bottom 3 bits are shift */ |
| 484 | if (to.divider == 3) |
| 485 | reg |= 0x08; /* /3 divider required */ |
| 486 | if (to.mclk != 288000000) |
| 487 | reg |= 0x10; /* which mclk pll is source */ |
| 488 | break; |
| 489 | |
| 490 | case SM501_CLOCK_MCLK: |
| 491 | case SM501_CLOCK_M1XCLK: |
| 492 | /* These clocks are the same and not further divided */ |
| 493 | |
| 494 | sm501_freq = sm501_select_clock( req_freq, &to, 3); |
| 495 | reg=to.shift & 0x07; /* bottom 3 bits are shift */ |
| 496 | if (to.divider == 3) |
| 497 | reg |= 0x08; /* /3 divider required */ |
| 498 | if (to.mclk != 288000000) |
| 499 | reg |= 0x10; /* which mclk pll is source */ |
| 500 | break; |
| 501 | |
| 502 | default: |
| 503 | return 0; /* this is bad */ |
| 504 | } |
| 505 | |
| 506 | mutex_lock(&sm->clock_lock); |
| 507 | |
| 508 | mode = readl(sm->regs + SM501_POWER_MODE_CONTROL); |
| 509 | gate = readl(sm->regs + SM501_CURRENT_GATE); |
| 510 | clock = readl(sm->regs + SM501_CURRENT_CLOCK); |
| 511 | |
| 512 | clock = clock & ~(0xFF << clksrc); |
| 513 | clock |= reg<<clksrc; |
| 514 | |
| 515 | mode &= 3; /* find current mode */ |
| 516 | |
| 517 | switch (mode) { |
| 518 | case 1: |
| 519 | writel(gate, sm->regs + SM501_POWER_MODE_0_GATE); |
| 520 | writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK); |
| 521 | mode = 0; |
| 522 | break; |
| 523 | case 2: |
| 524 | case 0: |
| 525 | writel(gate, sm->regs + SM501_POWER_MODE_1_GATE); |
| 526 | writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK); |
| 527 | mode = 1; |
| 528 | break; |
| 529 | |
| 530 | default: |
| 531 | mutex_unlock(&sm->clock_lock); |
| 532 | return -1; |
| 533 | } |
| 534 | |
| 535 | writel(mode, sm->regs + SM501_POWER_MODE_CONTROL); |
| 536 | sm501_sync_regs(sm); |
| 537 | |
| 538 | dev_info(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n", |
| 539 | gate, clock, mode); |
| 540 | |
| 541 | msleep(16); |
| 542 | mutex_unlock(&sm->clock_lock); |
| 543 | |
| 544 | sm501_dump_clk(sm); |
| 545 | |
| 546 | return sm501_freq; |
| 547 | } |
| 548 | |
| 549 | EXPORT_SYMBOL_GPL(sm501_set_clock); |
| 550 | |
| 551 | /* sm501_find_clock |
| 552 | * |
| 553 | * finds the closest available frequency for a given clock |
| 554 | */ |
| 555 | |
| 556 | unsigned long sm501_find_clock(int clksrc, |
| 557 | unsigned long req_freq) |
| 558 | { |
| 559 | unsigned long sm501_freq; /* the frequency achiveable by the 501 */ |
| 560 | struct sm501_clock to; |
| 561 | |
| 562 | switch (clksrc) { |
| 563 | case SM501_CLOCK_P2XCLK: |
| 564 | sm501_freq = (sm501_select_clock(2 * req_freq, &to, 5) / 2); |
| 565 | break; |
| 566 | |
| 567 | case SM501_CLOCK_V2XCLK: |
| 568 | sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2); |
| 569 | break; |
| 570 | |
| 571 | case SM501_CLOCK_MCLK: |
| 572 | case SM501_CLOCK_M1XCLK: |
| 573 | sm501_freq = sm501_select_clock(req_freq, &to, 3); |
| 574 | break; |
| 575 | |
| 576 | default: |
| 577 | sm501_freq = 0; /* error */ |
| 578 | } |
| 579 | |
| 580 | return sm501_freq; |
| 581 | } |
| 582 | |
| 583 | EXPORT_SYMBOL_GPL(sm501_find_clock); |
| 584 | |
| 585 | static struct sm501_device *to_sm_device(struct platform_device *pdev) |
| 586 | { |
| 587 | return container_of(pdev, struct sm501_device, pdev); |
| 588 | } |
| 589 | |
| 590 | /* sm501_device_release |
| 591 | * |
| 592 | * A release function for the platform devices we create to allow us to |
| 593 | * free any items we allocated |
| 594 | */ |
| 595 | |
| 596 | static void sm501_device_release(struct device *dev) |
| 597 | { |
| 598 | kfree(to_sm_device(to_platform_device(dev))); |
| 599 | } |
| 600 | |
| 601 | /* sm501_create_subdev |
| 602 | * |
| 603 | * Create a skeleton platform device with resources for passing to a |
| 604 | * sub-driver |
| 605 | */ |
| 606 | |
| 607 | static struct platform_device * |
| 608 | sm501_create_subdev(struct sm501_devdata *sm, |
| 609 | char *name, unsigned int res_count) |
| 610 | { |
| 611 | struct sm501_device *smdev; |
| 612 | |
| 613 | smdev = kzalloc(sizeof(struct sm501_device) + |
| 614 | sizeof(struct resource) * res_count, GFP_KERNEL); |
| 615 | if (!smdev) |
| 616 | return NULL; |
| 617 | |
| 618 | smdev->pdev.dev.release = sm501_device_release; |
| 619 | |
| 620 | smdev->pdev.name = name; |
| 621 | smdev->pdev.id = sm->pdev_id; |
| 622 | smdev->pdev.resource = (struct resource *)(smdev+1); |
| 623 | smdev->pdev.num_resources = res_count; |
| 624 | |
| 625 | smdev->pdev.dev.parent = sm->dev; |
| 626 | |
| 627 | return &smdev->pdev; |
| 628 | } |
| 629 | |
| 630 | /* sm501_register_device |
| 631 | * |
| 632 | * Register a platform device created with sm501_create_subdev() |
| 633 | */ |
| 634 | |
| 635 | static int sm501_register_device(struct sm501_devdata *sm, |
| 636 | struct platform_device *pdev) |
| 637 | { |
| 638 | struct sm501_device *smdev = to_sm_device(pdev); |
| 639 | int ptr; |
| 640 | int ret; |
| 641 | |
| 642 | for (ptr = 0; ptr < pdev->num_resources; ptr++) { |
| 643 | printk("%s[%d] flags %08lx: %08llx..%08llx\n", |
| 644 | pdev->name, ptr, |
| 645 | pdev->resource[ptr].flags, |
| 646 | (unsigned long long)pdev->resource[ptr].start, |
| 647 | (unsigned long long)pdev->resource[ptr].end); |
| 648 | } |
| 649 | |
| 650 | ret = platform_device_register(pdev); |
| 651 | |
| 652 | if (ret >= 0) { |
| 653 | dev_dbg(sm->dev, "registered %s\n", pdev->name); |
| 654 | list_add_tail(&smdev->list, &sm->devices); |
| 655 | } else |
| 656 | dev_err(sm->dev, "error registering %s (%d)\n", |
| 657 | pdev->name, ret); |
| 658 | |
| 659 | return ret; |
| 660 | } |
| 661 | |
| 662 | /* sm501_create_subio |
| 663 | * |
| 664 | * Fill in an IO resource for a sub device |
| 665 | */ |
| 666 | |
| 667 | static void sm501_create_subio(struct sm501_devdata *sm, |
| 668 | struct resource *res, |
| 669 | resource_size_t offs, |
| 670 | resource_size_t size) |
| 671 | { |
| 672 | res->flags = IORESOURCE_MEM; |
| 673 | res->parent = sm->io_res; |
| 674 | res->start = sm->io_res->start + offs; |
| 675 | res->end = res->start + size - 1; |
| 676 | } |
| 677 | |
| 678 | /* sm501_create_mem |
| 679 | * |
| 680 | * Fill in an MEM resource for a sub device |
| 681 | */ |
| 682 | |
| 683 | static void sm501_create_mem(struct sm501_devdata *sm, |
| 684 | struct resource *res, |
| 685 | resource_size_t *offs, |
| 686 | resource_size_t size) |
| 687 | { |
| 688 | *offs -= size; /* adjust memory size */ |
| 689 | |
| 690 | res->flags = IORESOURCE_MEM; |
| 691 | res->parent = sm->mem_res; |
| 692 | res->start = sm->mem_res->start + *offs; |
| 693 | res->end = res->start + size - 1; |
| 694 | } |
| 695 | |
| 696 | /* sm501_create_irq |
| 697 | * |
| 698 | * Fill in an IRQ resource for a sub device |
| 699 | */ |
| 700 | |
| 701 | static void sm501_create_irq(struct sm501_devdata *sm, |
| 702 | struct resource *res) |
| 703 | { |
| 704 | res->flags = IORESOURCE_IRQ; |
| 705 | res->parent = NULL; |
| 706 | res->start = res->end = sm->irq; |
| 707 | } |
| 708 | |
| 709 | static int sm501_register_usbhost(struct sm501_devdata *sm, |
| 710 | resource_size_t *mem_avail) |
| 711 | { |
| 712 | struct platform_device *pdev; |
| 713 | |
| 714 | pdev = sm501_create_subdev(sm, "sm501-usb", 3); |
| 715 | if (!pdev) |
| 716 | return -ENOMEM; |
| 717 | |
| 718 | sm501_create_subio(sm, &pdev->resource[0], 0x40000, 0x20000); |
| 719 | sm501_create_mem(sm, &pdev->resource[1], mem_avail, 256*1024); |
| 720 | sm501_create_irq(sm, &pdev->resource[2]); |
| 721 | |
| 722 | return sm501_register_device(sm, pdev); |
| 723 | } |
| 724 | |
| 725 | static int sm501_register_display(struct sm501_devdata *sm, |
| 726 | resource_size_t *mem_avail) |
| 727 | { |
| 728 | struct platform_device *pdev; |
| 729 | |
| 730 | pdev = sm501_create_subdev(sm, "sm501-fb", 4); |
| 731 | if (!pdev) |
| 732 | return -ENOMEM; |
| 733 | |
| 734 | sm501_create_subio(sm, &pdev->resource[0], 0x80000, 0x10000); |
| 735 | sm501_create_subio(sm, &pdev->resource[1], 0x100000, 0x50000); |
| 736 | sm501_create_mem(sm, &pdev->resource[2], mem_avail, *mem_avail); |
| 737 | sm501_create_irq(sm, &pdev->resource[3]); |
| 738 | |
| 739 | return sm501_register_device(sm, pdev); |
| 740 | } |
| 741 | |
| 742 | /* sm501_dbg_regs |
| 743 | * |
| 744 | * Debug attribute to attach to parent device to show core registers |
| 745 | */ |
| 746 | |
| 747 | static ssize_t sm501_dbg_regs(struct device *dev, |
| 748 | struct device_attribute *attr, char *buff) |
| 749 | { |
| 750 | struct sm501_devdata *sm = dev_get_drvdata(dev) ; |
| 751 | unsigned int reg; |
| 752 | char *ptr = buff; |
| 753 | int ret; |
| 754 | |
| 755 | for (reg = 0x00; reg < 0x70; reg += 4) { |
| 756 | ret = sprintf(ptr, "%08x = %08x\n", |
| 757 | reg, readl(sm->regs + reg)); |
| 758 | ptr += ret; |
| 759 | } |
| 760 | |
| 761 | return ptr - buff; |
| 762 | } |
| 763 | |
| 764 | |
| 765 | static DEVICE_ATTR(dbg_regs, 0666, sm501_dbg_regs, NULL); |
| 766 | |
| 767 | /* sm501_init_reg |
| 768 | * |
| 769 | * Helper function for the init code to setup a register |
| 770 | */ |
| 771 | |
| 772 | static inline void sm501_init_reg(struct sm501_devdata *sm, |
| 773 | unsigned long reg, |
| 774 | struct sm501_reg_init *r) |
| 775 | { |
| 776 | unsigned long tmp; |
| 777 | |
| 778 | tmp = readl(sm->regs + reg); |
| 779 | tmp |= r->set; |
| 780 | tmp &= ~r->mask; |
| 781 | writel(tmp, sm->regs + reg); |
| 782 | } |
| 783 | |
| 784 | /* sm501_init_regs |
| 785 | * |
| 786 | * Setup core register values |
| 787 | */ |
| 788 | |
| 789 | static void sm501_init_regs(struct sm501_devdata *sm, |
| 790 | struct sm501_initdata *init) |
| 791 | { |
| 792 | sm501_misc_control(sm->dev, |
| 793 | init->misc_control.set, |
| 794 | init->misc_control.mask); |
| 795 | |
| 796 | sm501_init_reg(sm, SM501_MISC_TIMING, &init->misc_timing); |
| 797 | sm501_init_reg(sm, SM501_GPIO31_0_CONTROL, &init->gpio_low); |
| 798 | sm501_init_reg(sm, SM501_GPIO63_32_CONTROL, &init->gpio_high); |
| 799 | |
| 800 | if (init->mclk) { |
| 801 | dev_info(sm->dev, "setting MCLK to %ld\n", init->mclk); |
| 802 | sm501_set_clock(sm->dev, SM501_CLOCK_MCLK, init->mclk); |
| 803 | } |
| 804 | |
| 805 | if (init->m1xclk) { |
| 806 | dev_info(sm->dev, "setting M1XCLK to %ld\n", init->m1xclk); |
| 807 | sm501_set_clock(sm->dev, SM501_CLOCK_M1XCLK, init->m1xclk); |
| 808 | } |
| 809 | } |
| 810 | |
| 811 | static unsigned int sm501_mem_local[] = { |
| 812 | [0] = 4*1024*1024, |
| 813 | [1] = 8*1024*1024, |
| 814 | [2] = 16*1024*1024, |
| 815 | [3] = 32*1024*1024, |
| 816 | [4] = 64*1024*1024, |
| 817 | [5] = 2*1024*1024, |
| 818 | }; |
| 819 | |
| 820 | /* sm501_init_dev |
| 821 | * |
| 822 | * Common init code for an SM501 |
| 823 | */ |
| 824 | |
| 825 | static int sm501_init_dev(struct sm501_devdata *sm) |
| 826 | { |
| 827 | resource_size_t mem_avail; |
| 828 | unsigned long dramctrl; |
| 829 | int ret; |
| 830 | |
| 831 | mutex_init(&sm->clock_lock); |
| 832 | spin_lock_init(&sm->reg_lock); |
| 833 | |
| 834 | INIT_LIST_HEAD(&sm->devices); |
| 835 | |
| 836 | dramctrl = readl(sm->regs + SM501_DRAM_CONTROL); |
| 837 | |
| 838 | mem_avail = sm501_mem_local[(dramctrl >> 13) & 0x7]; |
| 839 | |
| 840 | dev_info(sm->dev, "SM501 At %p: Version %08x, %ld Mb, IRQ %d\n", |
| 841 | sm->regs, readl(sm->regs + SM501_DEVICEID), |
| 842 | (unsigned long)mem_avail >> 20, sm->irq); |
| 843 | |
| 844 | dev_info(sm->dev, "CurrentGate %08x\n", readl(sm->regs+0x38)); |
| 845 | dev_info(sm->dev, "CurrentClock %08x\n", readl(sm->regs+0x3c)); |
| 846 | dev_info(sm->dev, "PowerModeControl %08x\n", readl(sm->regs+0x54)); |
| 847 | |
| 848 | ret = device_create_file(sm->dev, &dev_attr_dbg_regs); |
| 849 | if (ret) |
| 850 | dev_err(sm->dev, "failed to create debug regs file\n"); |
| 851 | |
| 852 | sm501_dump_clk(sm); |
| 853 | |
| 854 | /* check to see if we have some device initialisation */ |
| 855 | |
| 856 | if (sm->platdata) { |
| 857 | struct sm501_platdata *pdata = sm->platdata; |
| 858 | |
| 859 | if (pdata->init) { |
| 860 | sm501_init_regs(sm, sm->platdata->init); |
| 861 | |
| 862 | if (pdata->init->devices & SM501_USE_USB_HOST) |
| 863 | sm501_register_usbhost(sm, &mem_avail); |
| 864 | } |
| 865 | } |
| 866 | |
| 867 | /* always create a framebuffer */ |
| 868 | sm501_register_display(sm, &mem_avail); |
| 869 | |
| 870 | return 0; |
| 871 | } |
| 872 | |
| 873 | static int sm501_plat_probe(struct platform_device *dev) |
| 874 | { |
| 875 | struct sm501_devdata *sm; |
| 876 | int err; |
| 877 | |
| 878 | sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL); |
| 879 | if (sm == NULL) { |
| 880 | dev_err(&dev->dev, "no memory for device data\n"); |
| 881 | err = -ENOMEM; |
| 882 | goto err1; |
| 883 | } |
| 884 | |
| 885 | sm->dev = &dev->dev; |
| 886 | sm->pdev_id = dev->id; |
| 887 | sm->irq = platform_get_irq(dev, 0); |
| 888 | sm->io_res = platform_get_resource(dev, IORESOURCE_MEM, 1); |
| 889 | sm->mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
| 890 | sm->platdata = dev->dev.platform_data; |
| 891 | |
| 892 | if (sm->irq < 0) { |
| 893 | dev_err(&dev->dev, "failed to get irq resource\n"); |
| 894 | err = sm->irq; |
| 895 | goto err_res; |
| 896 | } |
| 897 | |
| 898 | if (sm->io_res == NULL || sm->mem_res == NULL) { |
| 899 | dev_err(&dev->dev, "failed to get IO resource\n"); |
| 900 | err = -ENOENT; |
| 901 | goto err_res; |
| 902 | } |
| 903 | |
| 904 | sm->regs_claim = request_mem_region(sm->io_res->start, |
| 905 | 0x100, "sm501"); |
| 906 | |
| 907 | if (sm->regs_claim == NULL) { |
| 908 | dev_err(&dev->dev, "cannot claim registers\n"); |
| 909 | err= -EBUSY; |
| 910 | goto err_res; |
| 911 | } |
| 912 | |
| 913 | platform_set_drvdata(dev, sm); |
| 914 | |
| 915 | sm->regs = ioremap(sm->io_res->start, |
| 916 | (sm->io_res->end - sm->io_res->start) - 1); |
| 917 | |
| 918 | if (sm->regs == NULL) { |
| 919 | dev_err(&dev->dev, "cannot remap registers\n"); |
| 920 | err = -EIO; |
| 921 | goto err_claim; |
| 922 | } |
| 923 | |
| 924 | return sm501_init_dev(sm); |
| 925 | |
| 926 | err_claim: |
| 927 | release_resource(sm->regs_claim); |
| 928 | kfree(sm->regs_claim); |
| 929 | err_res: |
| 930 | kfree(sm); |
| 931 | err1: |
| 932 | return err; |
| 933 | |
| 934 | } |
| 935 | |
| 936 | /* Initialisation data for PCI devices */ |
| 937 | |
| 938 | static struct sm501_initdata sm501_pci_initdata = { |
| 939 | .gpio_high = { |
| 940 | .set = 0x3F000000, /* 24bit panel */ |
| 941 | .mask = 0x0, |
| 942 | }, |
| 943 | .misc_timing = { |
| 944 | .set = 0x010100, /* SDRAM timing */ |
| 945 | .mask = 0x1F1F00, |
| 946 | }, |
| 947 | .misc_control = { |
| 948 | .set = SM501_MISC_PNL_24BIT, |
| 949 | .mask = 0, |
| 950 | }, |
| 951 | |
| 952 | .devices = SM501_USE_ALL, |
| 953 | .mclk = 100 * MHZ, |
| 954 | .m1xclk = 160 * MHZ, |
| 955 | }; |
| 956 | |
| 957 | static struct sm501_platdata_fbsub sm501_pdata_fbsub = { |
| 958 | .flags = (SM501FB_FLAG_USE_INIT_MODE | |
| 959 | SM501FB_FLAG_USE_HWCURSOR | |
| 960 | SM501FB_FLAG_USE_HWACCEL | |
| 961 | SM501FB_FLAG_DISABLE_AT_EXIT), |
| 962 | }; |
| 963 | |
| 964 | static struct sm501_platdata_fb sm501_fb_pdata = { |
| 965 | .fb_route = SM501_FB_OWN, |
| 966 | .fb_crt = &sm501_pdata_fbsub, |
| 967 | .fb_pnl = &sm501_pdata_fbsub, |
| 968 | }; |
| 969 | |
| 970 | static struct sm501_platdata sm501_pci_platdata = { |
| 971 | .init = &sm501_pci_initdata, |
| 972 | .fb = &sm501_fb_pdata, |
| 973 | }; |
| 974 | |
| 975 | static int sm501_pci_probe(struct pci_dev *dev, |
| 976 | const struct pci_device_id *id) |
| 977 | { |
| 978 | struct sm501_devdata *sm; |
| 979 | int err; |
| 980 | |
| 981 | sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL); |
| 982 | if (sm == NULL) { |
| 983 | dev_err(&dev->dev, "no memory for device data\n"); |
| 984 | err = -ENOMEM; |
| 985 | goto err1; |
| 986 | } |
| 987 | |
| 988 | /* set a default set of platform data */ |
| 989 | dev->dev.platform_data = sm->platdata = &sm501_pci_platdata; |
| 990 | |
| 991 | /* set a hopefully unique id for our child platform devices */ |
| 992 | sm->pdev_id = 32 + dev->devfn; |
| 993 | |
| 994 | pci_set_drvdata(dev, sm); |
| 995 | |
| 996 | err = pci_enable_device(dev); |
| 997 | if (err) { |
| 998 | dev_err(&dev->dev, "cannot enable device\n"); |
| 999 | goto err2; |
| 1000 | } |
| 1001 | |
| 1002 | sm->dev = &dev->dev; |
| 1003 | sm->irq = dev->irq; |
| 1004 | |
| 1005 | #ifdef __BIG_ENDIAN |
| 1006 | /* if the system is big-endian, we most probably have a |
| 1007 | * translation in the IO layer making the PCI bus little endian |
| 1008 | * so make the framebuffer swapped pixels */ |
| 1009 | |
| 1010 | sm501_fb_pdata.flags |= SM501_FBPD_SWAP_FB_ENDIAN; |
| 1011 | #endif |
| 1012 | |
| 1013 | /* check our resources */ |
| 1014 | |
| 1015 | if (!(pci_resource_flags(dev, 0) & IORESOURCE_MEM)) { |
| 1016 | dev_err(&dev->dev, "region #0 is not memory?\n"); |
| 1017 | err = -EINVAL; |
| 1018 | goto err3; |
| 1019 | } |
| 1020 | |
| 1021 | if (!(pci_resource_flags(dev, 1) & IORESOURCE_MEM)) { |
| 1022 | dev_err(&dev->dev, "region #1 is not memory?\n"); |
| 1023 | err = -EINVAL; |
| 1024 | goto err3; |
| 1025 | } |
| 1026 | |
| 1027 | /* make our resources ready for sharing */ |
| 1028 | |
| 1029 | sm->io_res = &dev->resource[1]; |
| 1030 | sm->mem_res = &dev->resource[0]; |
| 1031 | |
| 1032 | sm->regs_claim = request_mem_region(sm->io_res->start, |
| 1033 | 0x100, "sm501"); |
| 1034 | if (sm->regs_claim == NULL) { |
| 1035 | dev_err(&dev->dev, "cannot claim registers\n"); |
| 1036 | err= -EBUSY; |
| 1037 | goto err3; |
| 1038 | } |
| 1039 | |
| 1040 | sm->regs = ioremap(pci_resource_start(dev, 1), |
| 1041 | pci_resource_len(dev, 1)); |
| 1042 | |
| 1043 | if (sm->regs == NULL) { |
| 1044 | dev_err(&dev->dev, "cannot remap registers\n"); |
| 1045 | err = -EIO; |
| 1046 | goto err4; |
| 1047 | } |
| 1048 | |
| 1049 | sm501_init_dev(sm); |
| 1050 | return 0; |
| 1051 | |
| 1052 | err4: |
| 1053 | release_resource(sm->regs_claim); |
| 1054 | kfree(sm->regs_claim); |
| 1055 | err3: |
| 1056 | pci_disable_device(dev); |
| 1057 | err2: |
| 1058 | pci_set_drvdata(dev, NULL); |
| 1059 | kfree(sm); |
| 1060 | err1: |
| 1061 | return err; |
| 1062 | } |
| 1063 | |
| 1064 | static void sm501_remove_sub(struct sm501_devdata *sm, |
| 1065 | struct sm501_device *smdev) |
| 1066 | { |
| 1067 | list_del(&smdev->list); |
| 1068 | platform_device_unregister(&smdev->pdev); |
| 1069 | } |
| 1070 | |
| 1071 | static void sm501_dev_remove(struct sm501_devdata *sm) |
| 1072 | { |
| 1073 | struct sm501_device *smdev, *tmp; |
| 1074 | |
| 1075 | list_for_each_entry_safe(smdev, tmp, &sm->devices, list) |
| 1076 | sm501_remove_sub(sm, smdev); |
| 1077 | |
| 1078 | device_remove_file(sm->dev, &dev_attr_dbg_regs); |
| 1079 | } |
| 1080 | |
| 1081 | static void sm501_pci_remove(struct pci_dev *dev) |
| 1082 | { |
| 1083 | struct sm501_devdata *sm = pci_get_drvdata(dev); |
| 1084 | |
| 1085 | sm501_dev_remove(sm); |
| 1086 | iounmap(sm->regs); |
| 1087 | |
| 1088 | release_resource(sm->regs_claim); |
| 1089 | kfree(sm->regs_claim); |
| 1090 | |
| 1091 | pci_set_drvdata(dev, NULL); |
| 1092 | pci_disable_device(dev); |
| 1093 | } |
| 1094 | |
| 1095 | static int sm501_plat_remove(struct platform_device *dev) |
| 1096 | { |
| 1097 | struct sm501_devdata *sm = platform_get_drvdata(dev); |
| 1098 | |
| 1099 | sm501_dev_remove(sm); |
| 1100 | iounmap(sm->regs); |
| 1101 | |
| 1102 | release_resource(sm->regs_claim); |
| 1103 | kfree(sm->regs_claim); |
| 1104 | |
| 1105 | return 0; |
| 1106 | } |
| 1107 | |
| 1108 | static struct pci_device_id sm501_pci_tbl[] = { |
| 1109 | { 0x126f, 0x0501, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, |
| 1110 | { 0, }, |
| 1111 | }; |
| 1112 | |
| 1113 | MODULE_DEVICE_TABLE(pci, sm501_pci_tbl); |
| 1114 | |
| 1115 | static struct pci_driver sm501_pci_drv = { |
| 1116 | .name = "sm501", |
| 1117 | .id_table = sm501_pci_tbl, |
| 1118 | .probe = sm501_pci_probe, |
| 1119 | .remove = sm501_pci_remove, |
| 1120 | }; |
| 1121 | |
| 1122 | static struct platform_driver sm501_plat_drv = { |
| 1123 | .driver = { |
| 1124 | .name = "sm501", |
| 1125 | .owner = THIS_MODULE, |
| 1126 | }, |
| 1127 | .probe = sm501_plat_probe, |
| 1128 | .remove = sm501_plat_remove, |
| 1129 | }; |
| 1130 | |
| 1131 | static int __init sm501_base_init(void) |
| 1132 | { |
| 1133 | platform_driver_register(&sm501_plat_drv); |
Richard Knutsson | f15e66b | 2007-02-24 11:46:06 +0100 | [diff] [blame] | 1134 | return pci_register_driver(&sm501_pci_drv); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1135 | } |
| 1136 | |
| 1137 | static void __exit sm501_base_exit(void) |
| 1138 | { |
| 1139 | platform_driver_unregister(&sm501_plat_drv); |
| 1140 | pci_unregister_driver(&sm501_pci_drv); |
| 1141 | } |
| 1142 | |
| 1143 | module_init(sm501_base_init); |
| 1144 | module_exit(sm501_base_exit); |
| 1145 | |
| 1146 | MODULE_DESCRIPTION("SM501 Core Driver"); |
| 1147 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Vincent Sanders"); |
| 1148 | MODULE_LICENSE("GPL v2"); |