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 #include <linux/i2c-gpio.h> 23 #include <linux/slab.h> 24 25 #include <linux/sm501.h> 26 #include <linux/sm501-regs.h> 27 #include <linux/serial_8250.h> 28 29 #include <linux/io.h> 30 31 struct sm501_device { 32 struct list_head list; 33 struct platform_device pdev; 34 }; 35 36 struct sm501_gpio; 37 38 #ifdef CONFIG_MFD_SM501_GPIO 39 #include <linux/gpio.h> 40 41 struct sm501_gpio_chip { 42 struct gpio_chip gpio; 43 struct sm501_gpio *ourgpio; /* to get back to parent. */ 44 void __iomem *regbase; 45 void __iomem *control; /* address of control reg. */ 46 }; 47 48 struct sm501_gpio { 49 struct sm501_gpio_chip low; 50 struct sm501_gpio_chip high; 51 spinlock_t lock; 52 53 unsigned int registered : 1; 54 void __iomem *regs; 55 struct resource *regs_res; 56 }; 57 #else 58 struct sm501_gpio { 59 /* no gpio support, empty definition for sm501_devdata. */ 60 }; 61 #endif 62 63 struct sm501_devdata { 64 spinlock_t reg_lock; 65 struct mutex clock_lock; 66 struct list_head devices; 67 struct sm501_gpio gpio; 68 69 struct device *dev; 70 struct resource *io_res; 71 struct resource *mem_res; 72 struct resource *regs_claim; 73 struct sm501_platdata *platdata; 74 75 76 unsigned int in_suspend; 77 unsigned long pm_misc; 78 79 int unit_power[20]; 80 unsigned int pdev_id; 81 unsigned int irq; 82 void __iomem *regs; 83 unsigned int rev; 84 }; 85 86 87 #define MHZ (1000 * 1000) 88 89 #ifdef DEBUG 90 static const unsigned int div_tab[] = { 91 [0] = 1, 92 [1] = 2, 93 [2] = 4, 94 [3] = 8, 95 [4] = 16, 96 [5] = 32, 97 [6] = 64, 98 [7] = 128, 99 [8] = 3, 100 [9] = 6, 101 [10] = 12, 102 [11] = 24, 103 [12] = 48, 104 [13] = 96, 105 [14] = 192, 106 [15] = 384, 107 [16] = 5, 108 [17] = 10, 109 [18] = 20, 110 [19] = 40, 111 [20] = 80, 112 [21] = 160, 113 [22] = 320, 114 [23] = 604, 115 }; 116 117 static unsigned long decode_div(unsigned long pll2, unsigned long val, 118 unsigned int lshft, unsigned int selbit, 119 unsigned long mask) 120 { 121 if (val & selbit) 122 pll2 = 288 * MHZ; 123 124 return pll2 / div_tab[(val >> lshft) & mask]; 125 } 126 127 #define fmt_freq(x) ((x) / MHZ), ((x) % MHZ), (x) 128 129 /* sm501_dump_clk 130 * 131 * Print out the current clock configuration for the device 132 */ 133 134 static void sm501_dump_clk(struct sm501_devdata *sm) 135 { 136 unsigned long misct = smc501_readl(sm->regs + SM501_MISC_TIMING); 137 unsigned long pm0 = smc501_readl(sm->regs + SM501_POWER_MODE_0_CLOCK); 138 unsigned long pm1 = smc501_readl(sm->regs + SM501_POWER_MODE_1_CLOCK); 139 unsigned long pmc = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL); 140 unsigned long sdclk0, sdclk1; 141 unsigned long pll2 = 0; 142 143 switch (misct & 0x30) { 144 case 0x00: 145 pll2 = 336 * MHZ; 146 break; 147 case 0x10: 148 pll2 = 288 * MHZ; 149 break; 150 case 0x20: 151 pll2 = 240 * MHZ; 152 break; 153 case 0x30: 154 pll2 = 192 * MHZ; 155 break; 156 } 157 158 sdclk0 = (misct & (1<<12)) ? pll2 : 288 * MHZ; 159 sdclk0 /= div_tab[((misct >> 8) & 0xf)]; 160 161 sdclk1 = (misct & (1<<20)) ? pll2 : 288 * MHZ; 162 sdclk1 /= div_tab[((misct >> 16) & 0xf)]; 163 164 dev_dbg(sm->dev, "MISCT=%08lx, PM0=%08lx, PM1=%08lx\n", 165 misct, pm0, pm1); 166 167 dev_dbg(sm->dev, "PLL2 = %ld.%ld MHz (%ld), SDCLK0=%08lx, SDCLK1=%08lx\n", 168 fmt_freq(pll2), sdclk0, sdclk1); 169 170 dev_dbg(sm->dev, "SDRAM: PM0=%ld, PM1=%ld\n", sdclk0, sdclk1); 171 172 dev_dbg(sm->dev, "PM0[%c]: " 173 "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), " 174 "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n", 175 (pmc & 3 ) == 0 ? '*' : '-', 176 fmt_freq(decode_div(pll2, pm0, 24, 1<<29, 31)), 177 fmt_freq(decode_div(pll2, pm0, 16, 1<<20, 15)), 178 fmt_freq(decode_div(pll2, pm0, 8, 1<<12, 15)), 179 fmt_freq(decode_div(pll2, pm0, 0, 1<<4, 15))); 180 181 dev_dbg(sm->dev, "PM1[%c]: " 182 "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), " 183 "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n", 184 (pmc & 3 ) == 1 ? '*' : '-', 185 fmt_freq(decode_div(pll2, pm1, 24, 1<<29, 31)), 186 fmt_freq(decode_div(pll2, pm1, 16, 1<<20, 15)), 187 fmt_freq(decode_div(pll2, pm1, 8, 1<<12, 15)), 188 fmt_freq(decode_div(pll2, pm1, 0, 1<<4, 15))); 189 } 190 191 static void sm501_dump_regs(struct sm501_devdata *sm) 192 { 193 void __iomem *regs = sm->regs; 194 195 dev_info(sm->dev, "System Control %08x\n", 196 smc501_readl(regs + SM501_SYSTEM_CONTROL)); 197 dev_info(sm->dev, "Misc Control %08x\n", 198 smc501_readl(regs + SM501_MISC_CONTROL)); 199 dev_info(sm->dev, "GPIO Control Low %08x\n", 200 smc501_readl(regs + SM501_GPIO31_0_CONTROL)); 201 dev_info(sm->dev, "GPIO Control Hi %08x\n", 202 smc501_readl(regs + SM501_GPIO63_32_CONTROL)); 203 dev_info(sm->dev, "DRAM Control %08x\n", 204 smc501_readl(regs + SM501_DRAM_CONTROL)); 205 dev_info(sm->dev, "Arbitration Ctrl %08x\n", 206 smc501_readl(regs + SM501_ARBTRTN_CONTROL)); 207 dev_info(sm->dev, "Misc Timing %08x\n", 208 smc501_readl(regs + SM501_MISC_TIMING)); 209 } 210 211 static void sm501_dump_gate(struct sm501_devdata *sm) 212 { 213 dev_info(sm->dev, "CurrentGate %08x\n", 214 smc501_readl(sm->regs + SM501_CURRENT_GATE)); 215 dev_info(sm->dev, "CurrentClock %08x\n", 216 smc501_readl(sm->regs + SM501_CURRENT_CLOCK)); 217 dev_info(sm->dev, "PowerModeControl %08x\n", 218 smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL)); 219 } 220 221 #else 222 static inline void sm501_dump_gate(struct sm501_devdata *sm) { } 223 static inline void sm501_dump_regs(struct sm501_devdata *sm) { } 224 static inline void sm501_dump_clk(struct sm501_devdata *sm) { } 225 #endif 226 227 /* sm501_sync_regs 228 * 229 * ensure the 230 */ 231 232 static void sm501_sync_regs(struct sm501_devdata *sm) 233 { 234 smc501_readl(sm->regs); 235 } 236 237 static inline void sm501_mdelay(struct sm501_devdata *sm, unsigned int delay) 238 { 239 /* during suspend/resume, we are currently not allowed to sleep, 240 * so change to using mdelay() instead of msleep() if we 241 * are in one of these paths */ 242 243 if (sm->in_suspend) 244 mdelay(delay); 245 else 246 msleep(delay); 247 } 248 249 /* sm501_misc_control 250 * 251 * alters the miscellaneous control parameters 252 */ 253 254 int sm501_misc_control(struct device *dev, 255 unsigned long set, unsigned long clear) 256 { 257 struct sm501_devdata *sm = dev_get_drvdata(dev); 258 unsigned long misc; 259 unsigned long save; 260 unsigned long to; 261 262 spin_lock_irqsave(&sm->reg_lock, save); 263 264 misc = smc501_readl(sm->regs + SM501_MISC_CONTROL); 265 to = (misc & ~clear) | set; 266 267 if (to != misc) { 268 smc501_writel(to, sm->regs + SM501_MISC_CONTROL); 269 sm501_sync_regs(sm); 270 271 dev_dbg(sm->dev, "MISC_CONTROL %08lx\n", misc); 272 } 273 274 spin_unlock_irqrestore(&sm->reg_lock, save); 275 return to; 276 } 277 278 EXPORT_SYMBOL_GPL(sm501_misc_control); 279 280 /* sm501_modify_reg 281 * 282 * Modify a register in the SM501 which may be shared with other 283 * drivers. 284 */ 285 286 unsigned long sm501_modify_reg(struct device *dev, 287 unsigned long reg, 288 unsigned long set, 289 unsigned long clear) 290 { 291 struct sm501_devdata *sm = dev_get_drvdata(dev); 292 unsigned long data; 293 unsigned long save; 294 295 spin_lock_irqsave(&sm->reg_lock, save); 296 297 data = smc501_readl(sm->regs + reg); 298 data |= set; 299 data &= ~clear; 300 301 smc501_writel(data, sm->regs + reg); 302 sm501_sync_regs(sm); 303 304 spin_unlock_irqrestore(&sm->reg_lock, save); 305 306 return data; 307 } 308 309 EXPORT_SYMBOL_GPL(sm501_modify_reg); 310 311 /* sm501_unit_power 312 * 313 * alters the power active gate to set specific units on or off 314 */ 315 316 int sm501_unit_power(struct device *dev, unsigned int unit, unsigned int to) 317 { 318 struct sm501_devdata *sm = dev_get_drvdata(dev); 319 unsigned long mode; 320 unsigned long gate; 321 unsigned long clock; 322 323 mutex_lock(&sm->clock_lock); 324 325 mode = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL); 326 gate = smc501_readl(sm->regs + SM501_CURRENT_GATE); 327 clock = smc501_readl(sm->regs + SM501_CURRENT_CLOCK); 328 329 mode &= 3; /* get current power mode */ 330 331 if (unit >= ARRAY_SIZE(sm->unit_power)) { 332 dev_err(dev, "%s: bad unit %d\n", __func__, unit); 333 goto already; 334 } 335 336 dev_dbg(sm->dev, "%s: unit %d, cur %d, to %d\n", __func__, unit, 337 sm->unit_power[unit], to); 338 339 if (to == 0 && sm->unit_power[unit] == 0) { 340 dev_err(sm->dev, "unit %d is already shutdown\n", unit); 341 goto already; 342 } 343 344 sm->unit_power[unit] += to ? 1 : -1; 345 to = sm->unit_power[unit] ? 1 : 0; 346 347 if (to) { 348 if (gate & (1 << unit)) 349 goto already; 350 gate |= (1 << unit); 351 } else { 352 if (!(gate & (1 << unit))) 353 goto already; 354 gate &= ~(1 << unit); 355 } 356 357 switch (mode) { 358 case 1: 359 smc501_writel(gate, sm->regs + SM501_POWER_MODE_0_GATE); 360 smc501_writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK); 361 mode = 0; 362 break; 363 case 2: 364 case 0: 365 smc501_writel(gate, sm->regs + SM501_POWER_MODE_1_GATE); 366 smc501_writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK); 367 mode = 1; 368 break; 369 370 default: 371 gate = -1; 372 goto already; 373 } 374 375 smc501_writel(mode, sm->regs + SM501_POWER_MODE_CONTROL); 376 sm501_sync_regs(sm); 377 378 dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n", 379 gate, clock, mode); 380 381 sm501_mdelay(sm, 16); 382 383 already: 384 mutex_unlock(&sm->clock_lock); 385 return gate; 386 } 387 388 EXPORT_SYMBOL_GPL(sm501_unit_power); 389 390 /* clock value structure. */ 391 struct sm501_clock { 392 unsigned long mclk; 393 int divider; 394 int shift; 395 unsigned int m, n, k; 396 }; 397 398 /* sm501_calc_clock 399 * 400 * Calculates the nearest discrete clock frequency that 401 * can be achieved with the specified input clock. 402 * the maximum divisor is 3 or 5 403 */ 404 405 static int sm501_calc_clock(unsigned long freq, 406 struct sm501_clock *clock, 407 int max_div, 408 unsigned long mclk, 409 long *best_diff) 410 { 411 int ret = 0; 412 int divider; 413 int shift; 414 long diff; 415 416 /* try dividers 1 and 3 for CRT and for panel, 417 try divider 5 for panel only.*/ 418 419 for (divider = 1; divider <= max_div; divider += 2) { 420 /* try all 8 shift values.*/ 421 for (shift = 0; shift < 8; shift++) { 422 /* Calculate difference to requested clock */ 423 diff = DIV_ROUND_CLOSEST(mclk, divider << shift) - freq; 424 if (diff < 0) 425 diff = -diff; 426 427 /* If it is less than the current, use it */ 428 if (diff < *best_diff) { 429 *best_diff = diff; 430 431 clock->mclk = mclk; 432 clock->divider = divider; 433 clock->shift = shift; 434 ret = 1; 435 } 436 } 437 } 438 439 return ret; 440 } 441 442 /* sm501_calc_pll 443 * 444 * Calculates the nearest discrete clock frequency that can be 445 * achieved using the programmable PLL. 446 * the maximum divisor is 3 or 5 447 */ 448 449 static unsigned long sm501_calc_pll(unsigned long freq, 450 struct sm501_clock *clock, 451 int max_div) 452 { 453 unsigned long mclk; 454 unsigned int m, n, k; 455 long best_diff = 999999999; 456 457 /* 458 * The SM502 datasheet doesn't specify the min/max values for M and N. 459 * N = 1 at least doesn't work in practice. 460 */ 461 for (m = 2; m <= 255; m++) { 462 for (n = 2; n <= 127; n++) { 463 for (k = 0; k <= 1; k++) { 464 mclk = (24000000UL * m / n) >> k; 465 466 if (sm501_calc_clock(freq, clock, max_div, 467 mclk, &best_diff)) { 468 clock->m = m; 469 clock->n = n; 470 clock->k = k; 471 } 472 } 473 } 474 } 475 476 /* Return best clock. */ 477 return clock->mclk / (clock->divider << clock->shift); 478 } 479 480 /* sm501_select_clock 481 * 482 * Calculates the nearest discrete clock frequency that can be 483 * achieved using the 288MHz and 336MHz PLLs. 484 * the maximum divisor is 3 or 5 485 */ 486 487 static unsigned long sm501_select_clock(unsigned long freq, 488 struct sm501_clock *clock, 489 int max_div) 490 { 491 unsigned long mclk; 492 long best_diff = 999999999; 493 494 /* Try 288MHz and 336MHz clocks. */ 495 for (mclk = 288000000; mclk <= 336000000; mclk += 48000000) { 496 sm501_calc_clock(freq, clock, max_div, mclk, &best_diff); 497 } 498 499 /* Return best clock. */ 500 return clock->mclk / (clock->divider << clock->shift); 501 } 502 503 /* sm501_set_clock 504 * 505 * set one of the four clock sources to the closest available frequency to 506 * the one specified 507 */ 508 509 unsigned long sm501_set_clock(struct device *dev, 510 int clksrc, 511 unsigned long req_freq) 512 { 513 struct sm501_devdata *sm = dev_get_drvdata(dev); 514 unsigned long mode = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL); 515 unsigned long gate = smc501_readl(sm->regs + SM501_CURRENT_GATE); 516 unsigned long clock = smc501_readl(sm->regs + SM501_CURRENT_CLOCK); 517 unsigned char reg; 518 unsigned int pll_reg = 0; 519 unsigned long sm501_freq; /* the actual frequency achieved */ 520 521 struct sm501_clock to; 522 523 /* find achivable discrete frequency and setup register value 524 * accordingly, V2XCLK, MCLK and M1XCLK are the same P2XCLK 525 * has an extra bit for the divider */ 526 527 switch (clksrc) { 528 case SM501_CLOCK_P2XCLK: 529 /* This clock is divided in half so to achieve the 530 * requested frequency the value must be multiplied by 531 * 2. This clock also has an additional pre divisor */ 532 533 if (sm->rev >= 0xC0) { 534 /* SM502 -> use the programmable PLL */ 535 sm501_freq = (sm501_calc_pll(2 * req_freq, 536 &to, 5) / 2); 537 reg = to.shift & 0x07;/* bottom 3 bits are shift */ 538 if (to.divider == 3) 539 reg |= 0x08; /* /3 divider required */ 540 else if (to.divider == 5) 541 reg |= 0x10; /* /5 divider required */ 542 reg |= 0x40; /* select the programmable PLL */ 543 pll_reg = 0x20000 | (to.k << 15) | (to.n << 8) | to.m; 544 } else { 545 sm501_freq = (sm501_select_clock(2 * req_freq, 546 &to, 5) / 2); 547 reg = to.shift & 0x07;/* bottom 3 bits are shift */ 548 if (to.divider == 3) 549 reg |= 0x08; /* /3 divider required */ 550 else if (to.divider == 5) 551 reg |= 0x10; /* /5 divider required */ 552 if (to.mclk != 288000000) 553 reg |= 0x20; /* which mclk pll is source */ 554 } 555 break; 556 557 case SM501_CLOCK_V2XCLK: 558 /* This clock is divided in half so to achieve the 559 * requested frequency the value must be multiplied by 2. */ 560 561 sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2); 562 reg=to.shift & 0x07; /* bottom 3 bits are shift */ 563 if (to.divider == 3) 564 reg |= 0x08; /* /3 divider required */ 565 if (to.mclk != 288000000) 566 reg |= 0x10; /* which mclk pll is source */ 567 break; 568 569 case SM501_CLOCK_MCLK: 570 case SM501_CLOCK_M1XCLK: 571 /* These clocks are the same and not further divided */ 572 573 sm501_freq = sm501_select_clock( req_freq, &to, 3); 574 reg=to.shift & 0x07; /* bottom 3 bits are shift */ 575 if (to.divider == 3) 576 reg |= 0x08; /* /3 divider required */ 577 if (to.mclk != 288000000) 578 reg |= 0x10; /* which mclk pll is source */ 579 break; 580 581 default: 582 return 0; /* this is bad */ 583 } 584 585 mutex_lock(&sm->clock_lock); 586 587 mode = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL); 588 gate = smc501_readl(sm->regs + SM501_CURRENT_GATE); 589 clock = smc501_readl(sm->regs + SM501_CURRENT_CLOCK); 590 591 clock = clock & ~(0xFF << clksrc); 592 clock |= reg<<clksrc; 593 594 mode &= 3; /* find current mode */ 595 596 switch (mode) { 597 case 1: 598 smc501_writel(gate, sm->regs + SM501_POWER_MODE_0_GATE); 599 smc501_writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK); 600 mode = 0; 601 break; 602 case 2: 603 case 0: 604 smc501_writel(gate, sm->regs + SM501_POWER_MODE_1_GATE); 605 smc501_writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK); 606 mode = 1; 607 break; 608 609 default: 610 mutex_unlock(&sm->clock_lock); 611 return -1; 612 } 613 614 smc501_writel(mode, sm->regs + SM501_POWER_MODE_CONTROL); 615 616 if (pll_reg) 617 smc501_writel(pll_reg, 618 sm->regs + SM501_PROGRAMMABLE_PLL_CONTROL); 619 620 sm501_sync_regs(sm); 621 622 dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n", 623 gate, clock, mode); 624 625 sm501_mdelay(sm, 16); 626 mutex_unlock(&sm->clock_lock); 627 628 sm501_dump_clk(sm); 629 630 return sm501_freq; 631 } 632 633 EXPORT_SYMBOL_GPL(sm501_set_clock); 634 635 /* sm501_find_clock 636 * 637 * finds the closest available frequency for a given clock 638 */ 639 640 unsigned long sm501_find_clock(struct device *dev, 641 int clksrc, 642 unsigned long req_freq) 643 { 644 struct sm501_devdata *sm = dev_get_drvdata(dev); 645 unsigned long sm501_freq; /* the frequency achieveable by the 501 */ 646 struct sm501_clock to; 647 648 switch (clksrc) { 649 case SM501_CLOCK_P2XCLK: 650 if (sm->rev >= 0xC0) { 651 /* SM502 -> use the programmable PLL */ 652 sm501_freq = (sm501_calc_pll(2 * req_freq, 653 &to, 5) / 2); 654 } else { 655 sm501_freq = (sm501_select_clock(2 * req_freq, 656 &to, 5) / 2); 657 } 658 break; 659 660 case SM501_CLOCK_V2XCLK: 661 sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2); 662 break; 663 664 case SM501_CLOCK_MCLK: 665 case SM501_CLOCK_M1XCLK: 666 sm501_freq = sm501_select_clock(req_freq, &to, 3); 667 break; 668 669 default: 670 sm501_freq = 0; /* error */ 671 } 672 673 return sm501_freq; 674 } 675 676 EXPORT_SYMBOL_GPL(sm501_find_clock); 677 678 static struct sm501_device *to_sm_device(struct platform_device *pdev) 679 { 680 return container_of(pdev, struct sm501_device, pdev); 681 } 682 683 /* sm501_device_release 684 * 685 * A release function for the platform devices we create to allow us to 686 * free any items we allocated 687 */ 688 689 static void sm501_device_release(struct device *dev) 690 { 691 kfree(to_sm_device(to_platform_device(dev))); 692 } 693 694 /* sm501_create_subdev 695 * 696 * Create a skeleton platform device with resources for passing to a 697 * sub-driver 698 */ 699 700 static struct platform_device * 701 sm501_create_subdev(struct sm501_devdata *sm, char *name, 702 unsigned int res_count, unsigned int platform_data_size) 703 { 704 struct sm501_device *smdev; 705 706 smdev = kzalloc(sizeof(struct sm501_device) + 707 (sizeof(struct resource) * res_count) + 708 platform_data_size, GFP_KERNEL); 709 if (!smdev) 710 return NULL; 711 712 smdev->pdev.dev.release = sm501_device_release; 713 714 smdev->pdev.name = name; 715 smdev->pdev.id = sm->pdev_id; 716 smdev->pdev.dev.parent = sm->dev; 717 718 if (res_count) { 719 smdev->pdev.resource = (struct resource *)(smdev+1); 720 smdev->pdev.num_resources = res_count; 721 } 722 if (platform_data_size) 723 smdev->pdev.dev.platform_data = (void *)(smdev+1); 724 725 return &smdev->pdev; 726 } 727 728 /* sm501_register_device 729 * 730 * Register a platform device created with sm501_create_subdev() 731 */ 732 733 static int sm501_register_device(struct sm501_devdata *sm, 734 struct platform_device *pdev) 735 { 736 struct sm501_device *smdev = to_sm_device(pdev); 737 int ptr; 738 int ret; 739 740 for (ptr = 0; ptr < pdev->num_resources; ptr++) { 741 printk(KERN_DEBUG "%s[%d] %pR\n", 742 pdev->name, ptr, &pdev->resource[ptr]); 743 } 744 745 ret = platform_device_register(pdev); 746 747 if (ret >= 0) { 748 dev_dbg(sm->dev, "registered %s\n", pdev->name); 749 list_add_tail(&smdev->list, &sm->devices); 750 } else 751 dev_err(sm->dev, "error registering %s (%d)\n", 752 pdev->name, ret); 753 754 return ret; 755 } 756 757 /* sm501_create_subio 758 * 759 * Fill in an IO resource for a sub device 760 */ 761 762 static void sm501_create_subio(struct sm501_devdata *sm, 763 struct resource *res, 764 resource_size_t offs, 765 resource_size_t size) 766 { 767 res->flags = IORESOURCE_MEM; 768 res->parent = sm->io_res; 769 res->start = sm->io_res->start + offs; 770 res->end = res->start + size - 1; 771 } 772 773 /* sm501_create_mem 774 * 775 * Fill in an MEM resource for a sub device 776 */ 777 778 static void sm501_create_mem(struct sm501_devdata *sm, 779 struct resource *res, 780 resource_size_t *offs, 781 resource_size_t size) 782 { 783 *offs -= size; /* adjust memory size */ 784 785 res->flags = IORESOURCE_MEM; 786 res->parent = sm->mem_res; 787 res->start = sm->mem_res->start + *offs; 788 res->end = res->start + size - 1; 789 } 790 791 /* sm501_create_irq 792 * 793 * Fill in an IRQ resource for a sub device 794 */ 795 796 static void sm501_create_irq(struct sm501_devdata *sm, 797 struct resource *res) 798 { 799 res->flags = IORESOURCE_IRQ; 800 res->parent = NULL; 801 res->start = res->end = sm->irq; 802 } 803 804 static int sm501_register_usbhost(struct sm501_devdata *sm, 805 resource_size_t *mem_avail) 806 { 807 struct platform_device *pdev; 808 809 pdev = sm501_create_subdev(sm, "sm501-usb", 3, 0); 810 if (!pdev) 811 return -ENOMEM; 812 813 sm501_create_subio(sm, &pdev->resource[0], 0x40000, 0x20000); 814 sm501_create_mem(sm, &pdev->resource[1], mem_avail, 256*1024); 815 sm501_create_irq(sm, &pdev->resource[2]); 816 817 return sm501_register_device(sm, pdev); 818 } 819 820 static void sm501_setup_uart_data(struct sm501_devdata *sm, 821 struct plat_serial8250_port *uart_data, 822 unsigned int offset) 823 { 824 uart_data->membase = sm->regs + offset; 825 uart_data->mapbase = sm->io_res->start + offset; 826 uart_data->iotype = UPIO_MEM; 827 uart_data->irq = sm->irq; 828 uart_data->flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_SHARE_IRQ; 829 uart_data->regshift = 2; 830 uart_data->uartclk = (9600 * 16); 831 } 832 833 static int sm501_register_uart(struct sm501_devdata *sm, int devices) 834 { 835 struct platform_device *pdev; 836 struct plat_serial8250_port *uart_data; 837 838 pdev = sm501_create_subdev(sm, "serial8250", 0, 839 sizeof(struct plat_serial8250_port) * 3); 840 if (!pdev) 841 return -ENOMEM; 842 843 uart_data = dev_get_platdata(&pdev->dev); 844 845 if (devices & SM501_USE_UART0) { 846 sm501_setup_uart_data(sm, uart_data++, 0x30000); 847 sm501_unit_power(sm->dev, SM501_GATE_UART0, 1); 848 sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 12, 0); 849 sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x01e0, 0); 850 } 851 if (devices & SM501_USE_UART1) { 852 sm501_setup_uart_data(sm, uart_data++, 0x30020); 853 sm501_unit_power(sm->dev, SM501_GATE_UART1, 1); 854 sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 13, 0); 855 sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x1e00, 0); 856 } 857 858 pdev->id = PLAT8250_DEV_SM501; 859 860 return sm501_register_device(sm, pdev); 861 } 862 863 static int sm501_register_display(struct sm501_devdata *sm, 864 resource_size_t *mem_avail) 865 { 866 struct platform_device *pdev; 867 868 pdev = sm501_create_subdev(sm, "sm501-fb", 4, 0); 869 if (!pdev) 870 return -ENOMEM; 871 872 sm501_create_subio(sm, &pdev->resource[0], 0x80000, 0x10000); 873 sm501_create_subio(sm, &pdev->resource[1], 0x100000, 0x50000); 874 sm501_create_mem(sm, &pdev->resource[2], mem_avail, *mem_avail); 875 sm501_create_irq(sm, &pdev->resource[3]); 876 877 return sm501_register_device(sm, pdev); 878 } 879 880 #ifdef CONFIG_MFD_SM501_GPIO 881 882 static inline struct sm501_gpio_chip *to_sm501_gpio(struct gpio_chip *gc) 883 { 884 return container_of(gc, struct sm501_gpio_chip, gpio); 885 } 886 887 static inline struct sm501_devdata *sm501_gpio_to_dev(struct sm501_gpio *gpio) 888 { 889 return container_of(gpio, struct sm501_devdata, gpio); 890 } 891 892 static int sm501_gpio_get(struct gpio_chip *chip, unsigned offset) 893 894 { 895 struct sm501_gpio_chip *smgpio = to_sm501_gpio(chip); 896 unsigned long result; 897 898 result = smc501_readl(smgpio->regbase + SM501_GPIO_DATA_LOW); 899 result >>= offset; 900 901 return result & 1UL; 902 } 903 904 static void sm501_gpio_ensure_gpio(struct sm501_gpio_chip *smchip, 905 unsigned long bit) 906 { 907 unsigned long ctrl; 908 909 /* check and modify if this pin is not set as gpio. */ 910 911 if (smc501_readl(smchip->control) & bit) { 912 dev_info(sm501_gpio_to_dev(smchip->ourgpio)->dev, 913 "changing mode of gpio, bit %08lx\n", bit); 914 915 ctrl = smc501_readl(smchip->control); 916 ctrl &= ~bit; 917 smc501_writel(ctrl, smchip->control); 918 919 sm501_sync_regs(sm501_gpio_to_dev(smchip->ourgpio)); 920 } 921 } 922 923 static void sm501_gpio_set(struct gpio_chip *chip, unsigned offset, int value) 924 925 { 926 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip); 927 struct sm501_gpio *smgpio = smchip->ourgpio; 928 unsigned long bit = 1 << offset; 929 void __iomem *regs = smchip->regbase; 930 unsigned long save; 931 unsigned long val; 932 933 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n", 934 __func__, chip, offset); 935 936 spin_lock_irqsave(&smgpio->lock, save); 937 938 val = smc501_readl(regs + SM501_GPIO_DATA_LOW) & ~bit; 939 if (value) 940 val |= bit; 941 smc501_writel(val, regs); 942 943 sm501_sync_regs(sm501_gpio_to_dev(smgpio)); 944 sm501_gpio_ensure_gpio(smchip, bit); 945 946 spin_unlock_irqrestore(&smgpio->lock, save); 947 } 948 949 static int sm501_gpio_input(struct gpio_chip *chip, unsigned offset) 950 { 951 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip); 952 struct sm501_gpio *smgpio = smchip->ourgpio; 953 void __iomem *regs = smchip->regbase; 954 unsigned long bit = 1 << offset; 955 unsigned long save; 956 unsigned long ddr; 957 958 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n", 959 __func__, chip, offset); 960 961 spin_lock_irqsave(&smgpio->lock, save); 962 963 ddr = smc501_readl(regs + SM501_GPIO_DDR_LOW); 964 smc501_writel(ddr & ~bit, regs + SM501_GPIO_DDR_LOW); 965 966 sm501_sync_regs(sm501_gpio_to_dev(smgpio)); 967 sm501_gpio_ensure_gpio(smchip, bit); 968 969 spin_unlock_irqrestore(&smgpio->lock, save); 970 971 return 0; 972 } 973 974 static int sm501_gpio_output(struct gpio_chip *chip, 975 unsigned offset, int value) 976 { 977 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip); 978 struct sm501_gpio *smgpio = smchip->ourgpio; 979 unsigned long bit = 1 << offset; 980 void __iomem *regs = smchip->regbase; 981 unsigned long save; 982 unsigned long val; 983 unsigned long ddr; 984 985 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d,%d)\n", 986 __func__, chip, offset, value); 987 988 spin_lock_irqsave(&smgpio->lock, save); 989 990 val = smc501_readl(regs + SM501_GPIO_DATA_LOW); 991 if (value) 992 val |= bit; 993 else 994 val &= ~bit; 995 smc501_writel(val, regs); 996 997 ddr = smc501_readl(regs + SM501_GPIO_DDR_LOW); 998 smc501_writel(ddr | bit, regs + SM501_GPIO_DDR_LOW); 999 1000 sm501_sync_regs(sm501_gpio_to_dev(smgpio)); 1001 smc501_writel(val, regs + SM501_GPIO_DATA_LOW); 1002 1003 sm501_sync_regs(sm501_gpio_to_dev(smgpio)); 1004 spin_unlock_irqrestore(&smgpio->lock, save); 1005 1006 return 0; 1007 } 1008 1009 static struct gpio_chip gpio_chip_template = { 1010 .ngpio = 32, 1011 .direction_input = sm501_gpio_input, 1012 .direction_output = sm501_gpio_output, 1013 .set = sm501_gpio_set, 1014 .get = sm501_gpio_get, 1015 }; 1016 1017 static int sm501_gpio_register_chip(struct sm501_devdata *sm, 1018 struct sm501_gpio *gpio, 1019 struct sm501_gpio_chip *chip) 1020 { 1021 struct sm501_platdata *pdata = sm->platdata; 1022 struct gpio_chip *gchip = &chip->gpio; 1023 int base = pdata->gpio_base; 1024 1025 chip->gpio = gpio_chip_template; 1026 1027 if (chip == &gpio->high) { 1028 if (base > 0) 1029 base += 32; 1030 chip->regbase = gpio->regs + SM501_GPIO_DATA_HIGH; 1031 chip->control = sm->regs + SM501_GPIO63_32_CONTROL; 1032 gchip->label = "SM501-HIGH"; 1033 } else { 1034 chip->regbase = gpio->regs + SM501_GPIO_DATA_LOW; 1035 chip->control = sm->regs + SM501_GPIO31_0_CONTROL; 1036 gchip->label = "SM501-LOW"; 1037 } 1038 1039 gchip->base = base; 1040 chip->ourgpio = gpio; 1041 1042 return gpiochip_add(gchip); 1043 } 1044 1045 static int sm501_register_gpio(struct sm501_devdata *sm) 1046 { 1047 struct sm501_gpio *gpio = &sm->gpio; 1048 resource_size_t iobase = sm->io_res->start + SM501_GPIO; 1049 int ret; 1050 int tmp; 1051 1052 dev_dbg(sm->dev, "registering gpio block %08llx\n", 1053 (unsigned long long)iobase); 1054 1055 spin_lock_init(&gpio->lock); 1056 1057 gpio->regs_res = request_mem_region(iobase, 0x20, "sm501-gpio"); 1058 if (gpio->regs_res == NULL) { 1059 dev_err(sm->dev, "gpio: failed to request region\n"); 1060 return -ENXIO; 1061 } 1062 1063 gpio->regs = ioremap(iobase, 0x20); 1064 if (gpio->regs == NULL) { 1065 dev_err(sm->dev, "gpio: failed to remap registers\n"); 1066 ret = -ENXIO; 1067 goto err_claimed; 1068 } 1069 1070 /* Register both our chips. */ 1071 1072 ret = sm501_gpio_register_chip(sm, gpio, &gpio->low); 1073 if (ret) { 1074 dev_err(sm->dev, "failed to add low chip\n"); 1075 goto err_mapped; 1076 } 1077 1078 ret = sm501_gpio_register_chip(sm, gpio, &gpio->high); 1079 if (ret) { 1080 dev_err(sm->dev, "failed to add high chip\n"); 1081 goto err_low_chip; 1082 } 1083 1084 gpio->registered = 1; 1085 1086 return 0; 1087 1088 err_low_chip: 1089 tmp = gpiochip_remove(&gpio->low.gpio); 1090 if (tmp) { 1091 dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n"); 1092 return ret; 1093 } 1094 1095 err_mapped: 1096 iounmap(gpio->regs); 1097 1098 err_claimed: 1099 release_resource(gpio->regs_res); 1100 kfree(gpio->regs_res); 1101 1102 return ret; 1103 } 1104 1105 static void sm501_gpio_remove(struct sm501_devdata *sm) 1106 { 1107 struct sm501_gpio *gpio = &sm->gpio; 1108 int ret; 1109 1110 if (!sm->gpio.registered) 1111 return; 1112 1113 ret = gpiochip_remove(&gpio->low.gpio); 1114 if (ret) 1115 dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n"); 1116 1117 ret = gpiochip_remove(&gpio->high.gpio); 1118 if (ret) 1119 dev_err(sm->dev, "cannot remove high chip, cannot tidy up\n"); 1120 1121 iounmap(gpio->regs); 1122 release_resource(gpio->regs_res); 1123 kfree(gpio->regs_res); 1124 } 1125 1126 static inline int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin) 1127 { 1128 struct sm501_gpio *gpio = &sm->gpio; 1129 int base = (pin < 32) ? gpio->low.gpio.base : gpio->high.gpio.base; 1130 1131 return (pin % 32) + base; 1132 } 1133 1134 static inline int sm501_gpio_isregistered(struct sm501_devdata *sm) 1135 { 1136 return sm->gpio.registered; 1137 } 1138 #else 1139 static inline int sm501_register_gpio(struct sm501_devdata *sm) 1140 { 1141 return 0; 1142 } 1143 1144 static inline void sm501_gpio_remove(struct sm501_devdata *sm) 1145 { 1146 } 1147 1148 static inline int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin) 1149 { 1150 return -1; 1151 } 1152 1153 static inline int sm501_gpio_isregistered(struct sm501_devdata *sm) 1154 { 1155 return 0; 1156 } 1157 #endif 1158 1159 static int sm501_register_gpio_i2c_instance(struct sm501_devdata *sm, 1160 struct sm501_platdata_gpio_i2c *iic) 1161 { 1162 struct i2c_gpio_platform_data *icd; 1163 struct platform_device *pdev; 1164 1165 pdev = sm501_create_subdev(sm, "i2c-gpio", 0, 1166 sizeof(struct i2c_gpio_platform_data)); 1167 if (!pdev) 1168 return -ENOMEM; 1169 1170 icd = dev_get_platdata(&pdev->dev); 1171 1172 /* We keep the pin_sda and pin_scl fields relative in case the 1173 * same platform data is passed to >1 SM501. 1174 */ 1175 1176 icd->sda_pin = sm501_gpio_pin2nr(sm, iic->pin_sda); 1177 icd->scl_pin = sm501_gpio_pin2nr(sm, iic->pin_scl); 1178 icd->timeout = iic->timeout; 1179 icd->udelay = iic->udelay; 1180 1181 /* note, we can't use either of the pin numbers, as the i2c-gpio 1182 * driver uses the platform.id field to generate the bus number 1183 * to register with the i2c core; The i2c core doesn't have enough 1184 * entries to deal with anything we currently use. 1185 */ 1186 1187 pdev->id = iic->bus_num; 1188 1189 dev_info(sm->dev, "registering i2c-%d: sda=%d (%d), scl=%d (%d)\n", 1190 iic->bus_num, 1191 icd->sda_pin, iic->pin_sda, icd->scl_pin, iic->pin_scl); 1192 1193 return sm501_register_device(sm, pdev); 1194 } 1195 1196 static int sm501_register_gpio_i2c(struct sm501_devdata *sm, 1197 struct sm501_platdata *pdata) 1198 { 1199 struct sm501_platdata_gpio_i2c *iic = pdata->gpio_i2c; 1200 int index; 1201 int ret; 1202 1203 for (index = 0; index < pdata->gpio_i2c_nr; index++, iic++) { 1204 ret = sm501_register_gpio_i2c_instance(sm, iic); 1205 if (ret < 0) 1206 return ret; 1207 } 1208 1209 return 0; 1210 } 1211 1212 /* sm501_dbg_regs 1213 * 1214 * Debug attribute to attach to parent device to show core registers 1215 */ 1216 1217 static ssize_t sm501_dbg_regs(struct device *dev, 1218 struct device_attribute *attr, char *buff) 1219 { 1220 struct sm501_devdata *sm = dev_get_drvdata(dev) ; 1221 unsigned int reg; 1222 char *ptr = buff; 1223 int ret; 1224 1225 for (reg = 0x00; reg < 0x70; reg += 4) { 1226 ret = sprintf(ptr, "%08x = %08x\n", 1227 reg, smc501_readl(sm->regs + reg)); 1228 ptr += ret; 1229 } 1230 1231 return ptr - buff; 1232 } 1233 1234 1235 static DEVICE_ATTR(dbg_regs, 0666, sm501_dbg_regs, NULL); 1236 1237 /* sm501_init_reg 1238 * 1239 * Helper function for the init code to setup a register 1240 * 1241 * clear the bits which are set in r->mask, and then set 1242 * the bits set in r->set. 1243 */ 1244 1245 static inline void sm501_init_reg(struct sm501_devdata *sm, 1246 unsigned long reg, 1247 struct sm501_reg_init *r) 1248 { 1249 unsigned long tmp; 1250 1251 tmp = smc501_readl(sm->regs + reg); 1252 tmp &= ~r->mask; 1253 tmp |= r->set; 1254 smc501_writel(tmp, sm->regs + reg); 1255 } 1256 1257 /* sm501_init_regs 1258 * 1259 * Setup core register values 1260 */ 1261 1262 static void sm501_init_regs(struct sm501_devdata *sm, 1263 struct sm501_initdata *init) 1264 { 1265 sm501_misc_control(sm->dev, 1266 init->misc_control.set, 1267 init->misc_control.mask); 1268 1269 sm501_init_reg(sm, SM501_MISC_TIMING, &init->misc_timing); 1270 sm501_init_reg(sm, SM501_GPIO31_0_CONTROL, &init->gpio_low); 1271 sm501_init_reg(sm, SM501_GPIO63_32_CONTROL, &init->gpio_high); 1272 1273 if (init->m1xclk) { 1274 dev_info(sm->dev, "setting M1XCLK to %ld\n", init->m1xclk); 1275 sm501_set_clock(sm->dev, SM501_CLOCK_M1XCLK, init->m1xclk); 1276 } 1277 1278 if (init->mclk) { 1279 dev_info(sm->dev, "setting MCLK to %ld\n", init->mclk); 1280 sm501_set_clock(sm->dev, SM501_CLOCK_MCLK, init->mclk); 1281 } 1282 1283 } 1284 1285 /* Check the PLL sources for the M1CLK and M1XCLK 1286 * 1287 * If the M1CLK and M1XCLKs are not sourced from the same PLL, then 1288 * there is a risk (see errata AB-5) that the SM501 will cease proper 1289 * function. If this happens, then it is likely the SM501 will 1290 * hang the system. 1291 */ 1292 1293 static int sm501_check_clocks(struct sm501_devdata *sm) 1294 { 1295 unsigned long pwrmode = smc501_readl(sm->regs + SM501_CURRENT_CLOCK); 1296 unsigned long msrc = (pwrmode & SM501_POWERMODE_M_SRC); 1297 unsigned long m1src = (pwrmode & SM501_POWERMODE_M1_SRC); 1298 1299 return ((msrc == 0 && m1src != 0) || (msrc != 0 && m1src == 0)); 1300 } 1301 1302 static unsigned int sm501_mem_local[] = { 1303 [0] = 4*1024*1024, 1304 [1] = 8*1024*1024, 1305 [2] = 16*1024*1024, 1306 [3] = 32*1024*1024, 1307 [4] = 64*1024*1024, 1308 [5] = 2*1024*1024, 1309 }; 1310 1311 /* sm501_init_dev 1312 * 1313 * Common init code for an SM501 1314 */ 1315 1316 static int sm501_init_dev(struct sm501_devdata *sm) 1317 { 1318 struct sm501_initdata *idata; 1319 struct sm501_platdata *pdata; 1320 resource_size_t mem_avail; 1321 unsigned long dramctrl; 1322 unsigned long devid; 1323 int ret; 1324 1325 mutex_init(&sm->clock_lock); 1326 spin_lock_init(&sm->reg_lock); 1327 1328 INIT_LIST_HEAD(&sm->devices); 1329 1330 devid = smc501_readl(sm->regs + SM501_DEVICEID); 1331 1332 if ((devid & SM501_DEVICEID_IDMASK) != SM501_DEVICEID_SM501) { 1333 dev_err(sm->dev, "incorrect device id %08lx\n", devid); 1334 return -EINVAL; 1335 } 1336 1337 /* disable irqs */ 1338 smc501_writel(0, sm->regs + SM501_IRQ_MASK); 1339 1340 dramctrl = smc501_readl(sm->regs + SM501_DRAM_CONTROL); 1341 mem_avail = sm501_mem_local[(dramctrl >> 13) & 0x7]; 1342 1343 dev_info(sm->dev, "SM501 At %p: Version %08lx, %ld Mb, IRQ %d\n", 1344 sm->regs, devid, (unsigned long)mem_avail >> 20, sm->irq); 1345 1346 sm->rev = devid & SM501_DEVICEID_REVMASK; 1347 1348 sm501_dump_gate(sm); 1349 1350 ret = device_create_file(sm->dev, &dev_attr_dbg_regs); 1351 if (ret) 1352 dev_err(sm->dev, "failed to create debug regs file\n"); 1353 1354 sm501_dump_clk(sm); 1355 1356 /* check to see if we have some device initialisation */ 1357 1358 pdata = sm->platdata; 1359 idata = pdata ? pdata->init : NULL; 1360 1361 if (idata) { 1362 sm501_init_regs(sm, idata); 1363 1364 if (idata->devices & SM501_USE_USB_HOST) 1365 sm501_register_usbhost(sm, &mem_avail); 1366 if (idata->devices & (SM501_USE_UART0 | SM501_USE_UART1)) 1367 sm501_register_uart(sm, idata->devices); 1368 if (idata->devices & SM501_USE_GPIO) 1369 sm501_register_gpio(sm); 1370 } 1371 1372 if (pdata && pdata->gpio_i2c != NULL && pdata->gpio_i2c_nr > 0) { 1373 if (!sm501_gpio_isregistered(sm)) 1374 dev_err(sm->dev, "no gpio available for i2c gpio.\n"); 1375 else 1376 sm501_register_gpio_i2c(sm, pdata); 1377 } 1378 1379 ret = sm501_check_clocks(sm); 1380 if (ret) { 1381 dev_err(sm->dev, "M1X and M clocks sourced from different " 1382 "PLLs\n"); 1383 return -EINVAL; 1384 } 1385 1386 /* always create a framebuffer */ 1387 sm501_register_display(sm, &mem_avail); 1388 1389 return 0; 1390 } 1391 1392 static int sm501_plat_probe(struct platform_device *dev) 1393 { 1394 struct sm501_devdata *sm; 1395 int ret; 1396 1397 sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL); 1398 if (sm == NULL) { 1399 dev_err(&dev->dev, "no memory for device data\n"); 1400 ret = -ENOMEM; 1401 goto err1; 1402 } 1403 1404 sm->dev = &dev->dev; 1405 sm->pdev_id = dev->id; 1406 sm->platdata = dev_get_platdata(&dev->dev); 1407 1408 ret = platform_get_irq(dev, 0); 1409 if (ret < 0) { 1410 dev_err(&dev->dev, "failed to get irq resource\n"); 1411 goto err_res; 1412 } 1413 sm->irq = ret; 1414 1415 sm->io_res = platform_get_resource(dev, IORESOURCE_MEM, 1); 1416 sm->mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0); 1417 1418 if (sm->io_res == NULL || sm->mem_res == NULL) { 1419 dev_err(&dev->dev, "failed to get IO resource\n"); 1420 ret = -ENOENT; 1421 goto err_res; 1422 } 1423 1424 sm->regs_claim = request_mem_region(sm->io_res->start, 1425 0x100, "sm501"); 1426 1427 if (sm->regs_claim == NULL) { 1428 dev_err(&dev->dev, "cannot claim registers\n"); 1429 ret = -EBUSY; 1430 goto err_res; 1431 } 1432 1433 platform_set_drvdata(dev, sm); 1434 1435 sm->regs = ioremap(sm->io_res->start, resource_size(sm->io_res)); 1436 1437 if (sm->regs == NULL) { 1438 dev_err(&dev->dev, "cannot remap registers\n"); 1439 ret = -EIO; 1440 goto err_claim; 1441 } 1442 1443 return sm501_init_dev(sm); 1444 1445 err_claim: 1446 release_resource(sm->regs_claim); 1447 kfree(sm->regs_claim); 1448 err_res: 1449 kfree(sm); 1450 err1: 1451 return ret; 1452 1453 } 1454 1455 #ifdef CONFIG_PM 1456 1457 /* power management support */ 1458 1459 static void sm501_set_power(struct sm501_devdata *sm, int on) 1460 { 1461 struct sm501_platdata *pd = sm->platdata; 1462 1463 if (pd == NULL) 1464 return; 1465 1466 if (pd->get_power) { 1467 if (pd->get_power(sm->dev) == on) { 1468 dev_dbg(sm->dev, "is already %d\n", on); 1469 return; 1470 } 1471 } 1472 1473 if (pd->set_power) { 1474 dev_dbg(sm->dev, "setting power to %d\n", on); 1475 1476 pd->set_power(sm->dev, on); 1477 sm501_mdelay(sm, 10); 1478 } 1479 } 1480 1481 static int sm501_plat_suspend(struct platform_device *pdev, pm_message_t state) 1482 { 1483 struct sm501_devdata *sm = platform_get_drvdata(pdev); 1484 1485 sm->in_suspend = 1; 1486 sm->pm_misc = smc501_readl(sm->regs + SM501_MISC_CONTROL); 1487 1488 sm501_dump_regs(sm); 1489 1490 if (sm->platdata) { 1491 if (sm->platdata->flags & SM501_FLAG_SUSPEND_OFF) 1492 sm501_set_power(sm, 0); 1493 } 1494 1495 return 0; 1496 } 1497 1498 static int sm501_plat_resume(struct platform_device *pdev) 1499 { 1500 struct sm501_devdata *sm = platform_get_drvdata(pdev); 1501 1502 sm501_set_power(sm, 1); 1503 1504 sm501_dump_regs(sm); 1505 sm501_dump_gate(sm); 1506 sm501_dump_clk(sm); 1507 1508 /* check to see if we are in the same state as when suspended */ 1509 1510 if (smc501_readl(sm->regs + SM501_MISC_CONTROL) != sm->pm_misc) { 1511 dev_info(sm->dev, "SM501_MISC_CONTROL changed over sleep\n"); 1512 smc501_writel(sm->pm_misc, sm->regs + SM501_MISC_CONTROL); 1513 1514 /* our suspend causes the controller state to change, 1515 * either by something attempting setup, power loss, 1516 * or an external reset event on power change */ 1517 1518 if (sm->platdata && sm->platdata->init) { 1519 sm501_init_regs(sm, sm->platdata->init); 1520 } 1521 } 1522 1523 /* dump our state from resume */ 1524 1525 sm501_dump_regs(sm); 1526 sm501_dump_clk(sm); 1527 1528 sm->in_suspend = 0; 1529 1530 return 0; 1531 } 1532 #else 1533 #define sm501_plat_suspend NULL 1534 #define sm501_plat_resume NULL 1535 #endif 1536 1537 /* Initialisation data for PCI devices */ 1538 1539 static struct sm501_initdata sm501_pci_initdata = { 1540 .gpio_high = { 1541 .set = 0x3F000000, /* 24bit panel */ 1542 .mask = 0x0, 1543 }, 1544 .misc_timing = { 1545 .set = 0x010100, /* SDRAM timing */ 1546 .mask = 0x1F1F00, 1547 }, 1548 .misc_control = { 1549 .set = SM501_MISC_PNL_24BIT, 1550 .mask = 0, 1551 }, 1552 1553 .devices = SM501_USE_ALL, 1554 1555 /* Errata AB-3 says that 72MHz is the fastest available 1556 * for 33MHZ PCI with proper bus-mastering operation */ 1557 1558 .mclk = 72 * MHZ, 1559 .m1xclk = 144 * MHZ, 1560 }; 1561 1562 static struct sm501_platdata_fbsub sm501_pdata_fbsub = { 1563 .flags = (SM501FB_FLAG_USE_INIT_MODE | 1564 SM501FB_FLAG_USE_HWCURSOR | 1565 SM501FB_FLAG_USE_HWACCEL | 1566 SM501FB_FLAG_DISABLE_AT_EXIT), 1567 }; 1568 1569 static struct sm501_platdata_fb sm501_fb_pdata = { 1570 .fb_route = SM501_FB_OWN, 1571 .fb_crt = &sm501_pdata_fbsub, 1572 .fb_pnl = &sm501_pdata_fbsub, 1573 }; 1574 1575 static struct sm501_platdata sm501_pci_platdata = { 1576 .init = &sm501_pci_initdata, 1577 .fb = &sm501_fb_pdata, 1578 .gpio_base = -1, 1579 }; 1580 1581 static int sm501_pci_probe(struct pci_dev *dev, 1582 const struct pci_device_id *id) 1583 { 1584 struct sm501_devdata *sm; 1585 int err; 1586 1587 sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL); 1588 if (sm == NULL) { 1589 dev_err(&dev->dev, "no memory for device data\n"); 1590 err = -ENOMEM; 1591 goto err1; 1592 } 1593 1594 /* set a default set of platform data */ 1595 dev->dev.platform_data = sm->platdata = &sm501_pci_platdata; 1596 1597 /* set a hopefully unique id for our child platform devices */ 1598 sm->pdev_id = 32 + dev->devfn; 1599 1600 pci_set_drvdata(dev, sm); 1601 1602 err = pci_enable_device(dev); 1603 if (err) { 1604 dev_err(&dev->dev, "cannot enable device\n"); 1605 goto err2; 1606 } 1607 1608 sm->dev = &dev->dev; 1609 sm->irq = dev->irq; 1610 1611 #ifdef __BIG_ENDIAN 1612 /* if the system is big-endian, we most probably have a 1613 * translation in the IO layer making the PCI bus little endian 1614 * so make the framebuffer swapped pixels */ 1615 1616 sm501_fb_pdata.flags |= SM501_FBPD_SWAP_FB_ENDIAN; 1617 #endif 1618 1619 /* check our resources */ 1620 1621 if (!(pci_resource_flags(dev, 0) & IORESOURCE_MEM)) { 1622 dev_err(&dev->dev, "region #0 is not memory?\n"); 1623 err = -EINVAL; 1624 goto err3; 1625 } 1626 1627 if (!(pci_resource_flags(dev, 1) & IORESOURCE_MEM)) { 1628 dev_err(&dev->dev, "region #1 is not memory?\n"); 1629 err = -EINVAL; 1630 goto err3; 1631 } 1632 1633 /* make our resources ready for sharing */ 1634 1635 sm->io_res = &dev->resource[1]; 1636 sm->mem_res = &dev->resource[0]; 1637 1638 sm->regs_claim = request_mem_region(sm->io_res->start, 1639 0x100, "sm501"); 1640 if (sm->regs_claim == NULL) { 1641 dev_err(&dev->dev, "cannot claim registers\n"); 1642 err= -EBUSY; 1643 goto err3; 1644 } 1645 1646 sm->regs = pci_ioremap_bar(dev, 1); 1647 1648 if (sm->regs == NULL) { 1649 dev_err(&dev->dev, "cannot remap registers\n"); 1650 err = -EIO; 1651 goto err4; 1652 } 1653 1654 sm501_init_dev(sm); 1655 return 0; 1656 1657 err4: 1658 release_resource(sm->regs_claim); 1659 kfree(sm->regs_claim); 1660 err3: 1661 pci_disable_device(dev); 1662 err2: 1663 pci_set_drvdata(dev, NULL); 1664 kfree(sm); 1665 err1: 1666 return err; 1667 } 1668 1669 static void sm501_remove_sub(struct sm501_devdata *sm, 1670 struct sm501_device *smdev) 1671 { 1672 list_del(&smdev->list); 1673 platform_device_unregister(&smdev->pdev); 1674 } 1675 1676 static void sm501_dev_remove(struct sm501_devdata *sm) 1677 { 1678 struct sm501_device *smdev, *tmp; 1679 1680 list_for_each_entry_safe(smdev, tmp, &sm->devices, list) 1681 sm501_remove_sub(sm, smdev); 1682 1683 device_remove_file(sm->dev, &dev_attr_dbg_regs); 1684 1685 sm501_gpio_remove(sm); 1686 } 1687 1688 static void sm501_pci_remove(struct pci_dev *dev) 1689 { 1690 struct sm501_devdata *sm = pci_get_drvdata(dev); 1691 1692 sm501_dev_remove(sm); 1693 iounmap(sm->regs); 1694 1695 release_resource(sm->regs_claim); 1696 kfree(sm->regs_claim); 1697 1698 pci_set_drvdata(dev, NULL); 1699 pci_disable_device(dev); 1700 } 1701 1702 static int sm501_plat_remove(struct platform_device *dev) 1703 { 1704 struct sm501_devdata *sm = platform_get_drvdata(dev); 1705 1706 sm501_dev_remove(sm); 1707 iounmap(sm->regs); 1708 1709 release_resource(sm->regs_claim); 1710 kfree(sm->regs_claim); 1711 1712 return 0; 1713 } 1714 1715 static DEFINE_PCI_DEVICE_TABLE(sm501_pci_tbl) = { 1716 { 0x126f, 0x0501, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, 1717 { 0, }, 1718 }; 1719 1720 MODULE_DEVICE_TABLE(pci, sm501_pci_tbl); 1721 1722 static struct pci_driver sm501_pci_driver = { 1723 .name = "sm501", 1724 .id_table = sm501_pci_tbl, 1725 .probe = sm501_pci_probe, 1726 .remove = sm501_pci_remove, 1727 }; 1728 1729 MODULE_ALIAS("platform:sm501"); 1730 1731 static struct of_device_id of_sm501_match_tbl[] = { 1732 { .compatible = "smi,sm501", }, 1733 { /* end */ } 1734 }; 1735 1736 static struct platform_driver sm501_plat_driver = { 1737 .driver = { 1738 .name = "sm501", 1739 .owner = THIS_MODULE, 1740 .of_match_table = of_sm501_match_tbl, 1741 }, 1742 .probe = sm501_plat_probe, 1743 .remove = sm501_plat_remove, 1744 .suspend = sm501_plat_suspend, 1745 .resume = sm501_plat_resume, 1746 }; 1747 1748 static int __init sm501_base_init(void) 1749 { 1750 platform_driver_register(&sm501_plat_driver); 1751 return pci_register_driver(&sm501_pci_driver); 1752 } 1753 1754 static void __exit sm501_base_exit(void) 1755 { 1756 platform_driver_unregister(&sm501_plat_driver); 1757 pci_unregister_driver(&sm501_pci_driver); 1758 } 1759 1760 module_init(sm501_base_init); 1761 module_exit(sm501_base_exit); 1762 1763 MODULE_DESCRIPTION("SM501 Core Driver"); 1764 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Vincent Sanders"); 1765 MODULE_LICENSE("GPL v2"); 1766