1 /* 2 * linux/arch/arm/common/sa1111.c 3 * 4 * SA1111 support 5 * 6 * Original code by John Dorsey 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * This file contains all generic SA1111 support. 13 * 14 * All initialization functions provided here are intended to be called 15 * from machine specific code with proper arguments when required. 16 */ 17 #include <linux/module.h> 18 #include <linux/init.h> 19 #include <linux/kernel.h> 20 #include <linux/delay.h> 21 #include <linux/errno.h> 22 #include <linux/ioport.h> 23 #include <linux/platform_device.h> 24 #include <linux/slab.h> 25 #include <linux/spinlock.h> 26 #include <linux/dma-mapping.h> 27 #include <linux/clk.h> 28 #include <linux/io.h> 29 30 #include <mach/hardware.h> 31 #include <asm/mach-types.h> 32 #include <asm/irq.h> 33 #include <asm/mach/irq.h> 34 #include <asm/sizes.h> 35 36 #include <asm/hardware/sa1111.h> 37 38 /* SA1111 IRQs */ 39 #define IRQ_GPAIN0 (0) 40 #define IRQ_GPAIN1 (1) 41 #define IRQ_GPAIN2 (2) 42 #define IRQ_GPAIN3 (3) 43 #define IRQ_GPBIN0 (4) 44 #define IRQ_GPBIN1 (5) 45 #define IRQ_GPBIN2 (6) 46 #define IRQ_GPBIN3 (7) 47 #define IRQ_GPBIN4 (8) 48 #define IRQ_GPBIN5 (9) 49 #define IRQ_GPCIN0 (10) 50 #define IRQ_GPCIN1 (11) 51 #define IRQ_GPCIN2 (12) 52 #define IRQ_GPCIN3 (13) 53 #define IRQ_GPCIN4 (14) 54 #define IRQ_GPCIN5 (15) 55 #define IRQ_GPCIN6 (16) 56 #define IRQ_GPCIN7 (17) 57 #define IRQ_MSTXINT (18) 58 #define IRQ_MSRXINT (19) 59 #define IRQ_MSSTOPERRINT (20) 60 #define IRQ_TPTXINT (21) 61 #define IRQ_TPRXINT (22) 62 #define IRQ_TPSTOPERRINT (23) 63 #define SSPXMTINT (24) 64 #define SSPRCVINT (25) 65 #define SSPROR (26) 66 #define AUDXMTDMADONEA (32) 67 #define AUDRCVDMADONEA (33) 68 #define AUDXMTDMADONEB (34) 69 #define AUDRCVDMADONEB (35) 70 #define AUDTFSR (36) 71 #define AUDRFSR (37) 72 #define AUDTUR (38) 73 #define AUDROR (39) 74 #define AUDDTS (40) 75 #define AUDRDD (41) 76 #define AUDSTO (42) 77 #define IRQ_USBPWR (43) 78 #define IRQ_HCIM (44) 79 #define IRQ_HCIBUFFACC (45) 80 #define IRQ_HCIRMTWKP (46) 81 #define IRQ_NHCIMFCIR (47) 82 #define IRQ_USB_PORT_RESUME (48) 83 #define IRQ_S0_READY_NINT (49) 84 #define IRQ_S1_READY_NINT (50) 85 #define IRQ_S0_CD_VALID (51) 86 #define IRQ_S1_CD_VALID (52) 87 #define IRQ_S0_BVD1_STSCHG (53) 88 #define IRQ_S1_BVD1_STSCHG (54) 89 90 extern void __init sa1110_mb_enable(void); 91 92 /* 93 * We keep the following data for the overall SA1111. Note that the 94 * struct device and struct resource are "fake"; they should be supplied 95 * by the bus above us. However, in the interests of getting all SA1111 96 * drivers converted over to the device model, we provide this as an 97 * anchor point for all the other drivers. 98 */ 99 struct sa1111 { 100 struct device *dev; 101 struct clk *clk; 102 unsigned long phys; 103 int irq; 104 int irq_base; /* base for cascaded on-chip IRQs */ 105 spinlock_t lock; 106 void __iomem *base; 107 #ifdef CONFIG_PM 108 void *saved_state; 109 #endif 110 }; 111 112 /* 113 * We _really_ need to eliminate this. Its only users 114 * are the PWM and DMA checking code. 115 */ 116 static struct sa1111 *g_sa1111; 117 118 struct sa1111_dev_info { 119 unsigned long offset; 120 unsigned long skpcr_mask; 121 unsigned int devid; 122 unsigned int irq[6]; 123 }; 124 125 static struct sa1111_dev_info sa1111_devices[] = { 126 { 127 .offset = SA1111_USB, 128 .skpcr_mask = SKPCR_UCLKEN, 129 .devid = SA1111_DEVID_USB, 130 .irq = { 131 IRQ_USBPWR, 132 IRQ_HCIM, 133 IRQ_HCIBUFFACC, 134 IRQ_HCIRMTWKP, 135 IRQ_NHCIMFCIR, 136 IRQ_USB_PORT_RESUME 137 }, 138 }, 139 { 140 .offset = 0x0600, 141 .skpcr_mask = SKPCR_I2SCLKEN | SKPCR_L3CLKEN, 142 .devid = SA1111_DEVID_SAC, 143 .irq = { 144 AUDXMTDMADONEA, 145 AUDXMTDMADONEB, 146 AUDRCVDMADONEA, 147 AUDRCVDMADONEB 148 }, 149 }, 150 { 151 .offset = 0x0800, 152 .skpcr_mask = SKPCR_SCLKEN, 153 .devid = SA1111_DEVID_SSP, 154 }, 155 { 156 .offset = SA1111_KBD, 157 .skpcr_mask = SKPCR_PTCLKEN, 158 .devid = SA1111_DEVID_PS2, 159 .irq = { 160 IRQ_TPRXINT, 161 IRQ_TPTXINT 162 }, 163 }, 164 { 165 .offset = SA1111_MSE, 166 .skpcr_mask = SKPCR_PMCLKEN, 167 .devid = SA1111_DEVID_PS2, 168 .irq = { 169 IRQ_MSRXINT, 170 IRQ_MSTXINT 171 }, 172 }, 173 { 174 .offset = 0x1800, 175 .skpcr_mask = 0, 176 .devid = SA1111_DEVID_PCMCIA, 177 .irq = { 178 IRQ_S0_READY_NINT, 179 IRQ_S0_CD_VALID, 180 IRQ_S0_BVD1_STSCHG, 181 IRQ_S1_READY_NINT, 182 IRQ_S1_CD_VALID, 183 IRQ_S1_BVD1_STSCHG, 184 }, 185 }, 186 }; 187 188 /* 189 * SA1111 interrupt support. Since clearing an IRQ while there are 190 * active IRQs causes the interrupt output to pulse, the upper levels 191 * will call us again if there are more interrupts to process. 192 */ 193 static void 194 sa1111_irq_handler(unsigned int irq, struct irq_desc *desc) 195 { 196 unsigned int stat0, stat1, i; 197 struct sa1111 *sachip = irq_get_handler_data(irq); 198 void __iomem *mapbase = sachip->base + SA1111_INTC; 199 200 stat0 = sa1111_readl(mapbase + SA1111_INTSTATCLR0); 201 stat1 = sa1111_readl(mapbase + SA1111_INTSTATCLR1); 202 203 sa1111_writel(stat0, mapbase + SA1111_INTSTATCLR0); 204 205 desc->irq_data.chip->irq_ack(&desc->irq_data); 206 207 sa1111_writel(stat1, mapbase + SA1111_INTSTATCLR1); 208 209 if (stat0 == 0 && stat1 == 0) { 210 do_bad_IRQ(irq, desc); 211 return; 212 } 213 214 for (i = 0; stat0; i++, stat0 >>= 1) 215 if (stat0 & 1) 216 generic_handle_irq(i + sachip->irq_base); 217 218 for (i = 32; stat1; i++, stat1 >>= 1) 219 if (stat1 & 1) 220 generic_handle_irq(i + sachip->irq_base); 221 222 /* For level-based interrupts */ 223 desc->irq_data.chip->irq_unmask(&desc->irq_data); 224 } 225 226 #define SA1111_IRQMASK_LO(x) (1 << (x - sachip->irq_base)) 227 #define SA1111_IRQMASK_HI(x) (1 << (x - sachip->irq_base - 32)) 228 229 static void sa1111_ack_irq(struct irq_data *d) 230 { 231 } 232 233 static void sa1111_mask_lowirq(struct irq_data *d) 234 { 235 struct sa1111 *sachip = irq_data_get_irq_chip_data(d); 236 void __iomem *mapbase = sachip->base + SA1111_INTC; 237 unsigned long ie0; 238 239 ie0 = sa1111_readl(mapbase + SA1111_INTEN0); 240 ie0 &= ~SA1111_IRQMASK_LO(d->irq); 241 writel(ie0, mapbase + SA1111_INTEN0); 242 } 243 244 static void sa1111_unmask_lowirq(struct irq_data *d) 245 { 246 struct sa1111 *sachip = irq_data_get_irq_chip_data(d); 247 void __iomem *mapbase = sachip->base + SA1111_INTC; 248 unsigned long ie0; 249 250 ie0 = sa1111_readl(mapbase + SA1111_INTEN0); 251 ie0 |= SA1111_IRQMASK_LO(d->irq); 252 sa1111_writel(ie0, mapbase + SA1111_INTEN0); 253 } 254 255 /* 256 * Attempt to re-trigger the interrupt. The SA1111 contains a register 257 * (INTSET) which claims to do this. However, in practice no amount of 258 * manipulation of INTEN and INTSET guarantees that the interrupt will 259 * be triggered. In fact, its very difficult, if not impossible to get 260 * INTSET to re-trigger the interrupt. 261 */ 262 static int sa1111_retrigger_lowirq(struct irq_data *d) 263 { 264 struct sa1111 *sachip = irq_data_get_irq_chip_data(d); 265 void __iomem *mapbase = sachip->base + SA1111_INTC; 266 unsigned int mask = SA1111_IRQMASK_LO(d->irq); 267 unsigned long ip0; 268 int i; 269 270 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0); 271 for (i = 0; i < 8; i++) { 272 sa1111_writel(ip0 ^ mask, mapbase + SA1111_INTPOL0); 273 sa1111_writel(ip0, mapbase + SA1111_INTPOL0); 274 if (sa1111_readl(mapbase + SA1111_INTSTATCLR0) & mask) 275 break; 276 } 277 278 if (i == 8) 279 printk(KERN_ERR "Danger Will Robinson: failed to " 280 "re-trigger IRQ%d\n", d->irq); 281 return i == 8 ? -1 : 0; 282 } 283 284 static int sa1111_type_lowirq(struct irq_data *d, unsigned int flags) 285 { 286 struct sa1111 *sachip = irq_data_get_irq_chip_data(d); 287 void __iomem *mapbase = sachip->base + SA1111_INTC; 288 unsigned int mask = SA1111_IRQMASK_LO(d->irq); 289 unsigned long ip0; 290 291 if (flags == IRQ_TYPE_PROBE) 292 return 0; 293 294 if ((!(flags & IRQ_TYPE_EDGE_RISING) ^ !(flags & IRQ_TYPE_EDGE_FALLING)) == 0) 295 return -EINVAL; 296 297 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0); 298 if (flags & IRQ_TYPE_EDGE_RISING) 299 ip0 &= ~mask; 300 else 301 ip0 |= mask; 302 sa1111_writel(ip0, mapbase + SA1111_INTPOL0); 303 sa1111_writel(ip0, mapbase + SA1111_WAKEPOL0); 304 305 return 0; 306 } 307 308 static int sa1111_wake_lowirq(struct irq_data *d, unsigned int on) 309 { 310 struct sa1111 *sachip = irq_data_get_irq_chip_data(d); 311 void __iomem *mapbase = sachip->base + SA1111_INTC; 312 unsigned int mask = SA1111_IRQMASK_LO(d->irq); 313 unsigned long we0; 314 315 we0 = sa1111_readl(mapbase + SA1111_WAKEEN0); 316 if (on) 317 we0 |= mask; 318 else 319 we0 &= ~mask; 320 sa1111_writel(we0, mapbase + SA1111_WAKEEN0); 321 322 return 0; 323 } 324 325 static struct irq_chip sa1111_low_chip = { 326 .name = "SA1111-l", 327 .irq_ack = sa1111_ack_irq, 328 .irq_mask = sa1111_mask_lowirq, 329 .irq_unmask = sa1111_unmask_lowirq, 330 .irq_retrigger = sa1111_retrigger_lowirq, 331 .irq_set_type = sa1111_type_lowirq, 332 .irq_set_wake = sa1111_wake_lowirq, 333 }; 334 335 static void sa1111_mask_highirq(struct irq_data *d) 336 { 337 struct sa1111 *sachip = irq_data_get_irq_chip_data(d); 338 void __iomem *mapbase = sachip->base + SA1111_INTC; 339 unsigned long ie1; 340 341 ie1 = sa1111_readl(mapbase + SA1111_INTEN1); 342 ie1 &= ~SA1111_IRQMASK_HI(d->irq); 343 sa1111_writel(ie1, mapbase + SA1111_INTEN1); 344 } 345 346 static void sa1111_unmask_highirq(struct irq_data *d) 347 { 348 struct sa1111 *sachip = irq_data_get_irq_chip_data(d); 349 void __iomem *mapbase = sachip->base + SA1111_INTC; 350 unsigned long ie1; 351 352 ie1 = sa1111_readl(mapbase + SA1111_INTEN1); 353 ie1 |= SA1111_IRQMASK_HI(d->irq); 354 sa1111_writel(ie1, mapbase + SA1111_INTEN1); 355 } 356 357 /* 358 * Attempt to re-trigger the interrupt. The SA1111 contains a register 359 * (INTSET) which claims to do this. However, in practice no amount of 360 * manipulation of INTEN and INTSET guarantees that the interrupt will 361 * be triggered. In fact, its very difficult, if not impossible to get 362 * INTSET to re-trigger the interrupt. 363 */ 364 static int sa1111_retrigger_highirq(struct irq_data *d) 365 { 366 struct sa1111 *sachip = irq_data_get_irq_chip_data(d); 367 void __iomem *mapbase = sachip->base + SA1111_INTC; 368 unsigned int mask = SA1111_IRQMASK_HI(d->irq); 369 unsigned long ip1; 370 int i; 371 372 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1); 373 for (i = 0; i < 8; i++) { 374 sa1111_writel(ip1 ^ mask, mapbase + SA1111_INTPOL1); 375 sa1111_writel(ip1, mapbase + SA1111_INTPOL1); 376 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask) 377 break; 378 } 379 380 if (i == 8) 381 printk(KERN_ERR "Danger Will Robinson: failed to " 382 "re-trigger IRQ%d\n", d->irq); 383 return i == 8 ? -1 : 0; 384 } 385 386 static int sa1111_type_highirq(struct irq_data *d, unsigned int flags) 387 { 388 struct sa1111 *sachip = irq_data_get_irq_chip_data(d); 389 void __iomem *mapbase = sachip->base + SA1111_INTC; 390 unsigned int mask = SA1111_IRQMASK_HI(d->irq); 391 unsigned long ip1; 392 393 if (flags == IRQ_TYPE_PROBE) 394 return 0; 395 396 if ((!(flags & IRQ_TYPE_EDGE_RISING) ^ !(flags & IRQ_TYPE_EDGE_FALLING)) == 0) 397 return -EINVAL; 398 399 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1); 400 if (flags & IRQ_TYPE_EDGE_RISING) 401 ip1 &= ~mask; 402 else 403 ip1 |= mask; 404 sa1111_writel(ip1, mapbase + SA1111_INTPOL1); 405 sa1111_writel(ip1, mapbase + SA1111_WAKEPOL1); 406 407 return 0; 408 } 409 410 static int sa1111_wake_highirq(struct irq_data *d, unsigned int on) 411 { 412 struct sa1111 *sachip = irq_data_get_irq_chip_data(d); 413 void __iomem *mapbase = sachip->base + SA1111_INTC; 414 unsigned int mask = SA1111_IRQMASK_HI(d->irq); 415 unsigned long we1; 416 417 we1 = sa1111_readl(mapbase + SA1111_WAKEEN1); 418 if (on) 419 we1 |= mask; 420 else 421 we1 &= ~mask; 422 sa1111_writel(we1, mapbase + SA1111_WAKEEN1); 423 424 return 0; 425 } 426 427 static struct irq_chip sa1111_high_chip = { 428 .name = "SA1111-h", 429 .irq_ack = sa1111_ack_irq, 430 .irq_mask = sa1111_mask_highirq, 431 .irq_unmask = sa1111_unmask_highirq, 432 .irq_retrigger = sa1111_retrigger_highirq, 433 .irq_set_type = sa1111_type_highirq, 434 .irq_set_wake = sa1111_wake_highirq, 435 }; 436 437 static void sa1111_setup_irq(struct sa1111 *sachip) 438 { 439 void __iomem *irqbase = sachip->base + SA1111_INTC; 440 unsigned int irq; 441 442 /* 443 * We're guaranteed that this region hasn't been taken. 444 */ 445 request_mem_region(sachip->phys + SA1111_INTC, 512, "irq"); 446 447 /* disable all IRQs */ 448 sa1111_writel(0, irqbase + SA1111_INTEN0); 449 sa1111_writel(0, irqbase + SA1111_INTEN1); 450 sa1111_writel(0, irqbase + SA1111_WAKEEN0); 451 sa1111_writel(0, irqbase + SA1111_WAKEEN1); 452 453 /* 454 * detect on rising edge. Note: Feb 2001 Errata for SA1111 455 * specifies that S0ReadyInt and S1ReadyInt should be '1'. 456 */ 457 sa1111_writel(0, irqbase + SA1111_INTPOL0); 458 sa1111_writel(SA1111_IRQMASK_HI(IRQ_S0_READY_NINT) | 459 SA1111_IRQMASK_HI(IRQ_S1_READY_NINT), 460 irqbase + SA1111_INTPOL1); 461 462 /* clear all IRQs */ 463 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR0); 464 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR1); 465 466 for (irq = IRQ_GPAIN0; irq <= SSPROR; irq++) { 467 irq_set_chip_and_handler(irq, &sa1111_low_chip, 468 handle_edge_irq); 469 irq_set_chip_data(irq, sachip); 470 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); 471 } 472 473 for (irq = AUDXMTDMADONEA; irq <= IRQ_S1_BVD1_STSCHG; irq++) { 474 irq_set_chip_and_handler(irq, &sa1111_high_chip, 475 handle_edge_irq); 476 irq_set_chip_data(irq, sachip); 477 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); 478 } 479 480 /* 481 * Register SA1111 interrupt 482 */ 483 irq_set_irq_type(sachip->irq, IRQ_TYPE_EDGE_RISING); 484 irq_set_handler_data(sachip->irq, sachip); 485 irq_set_chained_handler(sachip->irq, sa1111_irq_handler); 486 } 487 488 /* 489 * Bring the SA1111 out of reset. This requires a set procedure: 490 * 1. nRESET asserted (by hardware) 491 * 2. CLK turned on from SA1110 492 * 3. nRESET deasserted 493 * 4. VCO turned on, PLL_BYPASS turned off 494 * 5. Wait lock time, then assert RCLKEn 495 * 7. PCR set to allow clocking of individual functions 496 * 497 * Until we've done this, the only registers we can access are: 498 * SBI_SKCR 499 * SBI_SMCR 500 * SBI_SKID 501 */ 502 static void sa1111_wake(struct sa1111 *sachip) 503 { 504 unsigned long flags, r; 505 506 spin_lock_irqsave(&sachip->lock, flags); 507 508 clk_enable(sachip->clk); 509 510 /* 511 * Turn VCO on, and disable PLL Bypass. 512 */ 513 r = sa1111_readl(sachip->base + SA1111_SKCR); 514 r &= ~SKCR_VCO_OFF; 515 sa1111_writel(r, sachip->base + SA1111_SKCR); 516 r |= SKCR_PLL_BYPASS | SKCR_OE_EN; 517 sa1111_writel(r, sachip->base + SA1111_SKCR); 518 519 /* 520 * Wait lock time. SA1111 manual _doesn't_ 521 * specify a figure for this! We choose 100us. 522 */ 523 udelay(100); 524 525 /* 526 * Enable RCLK. We also ensure that RDYEN is set. 527 */ 528 r |= SKCR_RCLKEN | SKCR_RDYEN; 529 sa1111_writel(r, sachip->base + SA1111_SKCR); 530 531 /* 532 * Wait 14 RCLK cycles for the chip to finish coming out 533 * of reset. (RCLK=24MHz). This is 590ns. 534 */ 535 udelay(1); 536 537 /* 538 * Ensure all clocks are initially off. 539 */ 540 sa1111_writel(0, sachip->base + SA1111_SKPCR); 541 542 spin_unlock_irqrestore(&sachip->lock, flags); 543 } 544 545 #ifdef CONFIG_ARCH_SA1100 546 547 static u32 sa1111_dma_mask[] = { 548 ~0, 549 ~(1 << 20), 550 ~(1 << 23), 551 ~(1 << 24), 552 ~(1 << 25), 553 ~(1 << 20), 554 ~(1 << 20), 555 0, 556 }; 557 558 /* 559 * Configure the SA1111 shared memory controller. 560 */ 561 void 562 sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac, 563 unsigned int cas_latency) 564 { 565 unsigned int smcr = SMCR_DTIM | SMCR_MBGE | FInsrt(drac, SMCR_DRAC); 566 567 if (cas_latency == 3) 568 smcr |= SMCR_CLAT; 569 570 sa1111_writel(smcr, sachip->base + SA1111_SMCR); 571 572 /* 573 * Now clear the bits in the DMA mask to work around the SA1111 574 * DMA erratum (Intel StrongARM SA-1111 Microprocessor Companion 575 * Chip Specification Update, June 2000, Erratum #7). 576 */ 577 if (sachip->dev->dma_mask) 578 *sachip->dev->dma_mask &= sa1111_dma_mask[drac >> 2]; 579 580 sachip->dev->coherent_dma_mask &= sa1111_dma_mask[drac >> 2]; 581 } 582 583 #endif 584 585 static void sa1111_dev_release(struct device *_dev) 586 { 587 struct sa1111_dev *dev = SA1111_DEV(_dev); 588 589 release_resource(&dev->res); 590 kfree(dev); 591 } 592 593 static int 594 sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent, 595 struct sa1111_dev_info *info) 596 { 597 struct sa1111_dev *dev; 598 int ret; 599 600 dev = kzalloc(sizeof(struct sa1111_dev), GFP_KERNEL); 601 if (!dev) { 602 ret = -ENOMEM; 603 goto out; 604 } 605 606 dev_set_name(&dev->dev, "%4.4lx", info->offset); 607 dev->devid = info->devid; 608 dev->dev.parent = sachip->dev; 609 dev->dev.bus = &sa1111_bus_type; 610 dev->dev.release = sa1111_dev_release; 611 dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask; 612 dev->res.start = sachip->phys + info->offset; 613 dev->res.end = dev->res.start + 511; 614 dev->res.name = dev_name(&dev->dev); 615 dev->res.flags = IORESOURCE_MEM; 616 dev->mapbase = sachip->base + info->offset; 617 dev->skpcr_mask = info->skpcr_mask; 618 memmove(dev->irq, info->irq, sizeof(dev->irq)); 619 620 ret = request_resource(parent, &dev->res); 621 if (ret) { 622 printk("SA1111: failed to allocate resource for %s\n", 623 dev->res.name); 624 dev_set_name(&dev->dev, NULL); 625 kfree(dev); 626 goto out; 627 } 628 629 630 ret = device_register(&dev->dev); 631 if (ret) { 632 release_resource(&dev->res); 633 kfree(dev); 634 goto out; 635 } 636 637 #ifdef CONFIG_DMABOUNCE 638 /* 639 * If the parent device has a DMA mask associated with it, 640 * propagate it down to the children. 641 */ 642 if (sachip->dev->dma_mask) { 643 dev->dma_mask = *sachip->dev->dma_mask; 644 dev->dev.dma_mask = &dev->dma_mask; 645 646 if (dev->dma_mask != 0xffffffffUL) { 647 ret = dmabounce_register_dev(&dev->dev, 1024, 4096); 648 if (ret) { 649 dev_err(&dev->dev, "SA1111: Failed to register" 650 " with dmabounce\n"); 651 device_unregister(&dev->dev); 652 } 653 } 654 } 655 #endif 656 657 out: 658 return ret; 659 } 660 661 /** 662 * sa1111_probe - probe for a single SA1111 chip. 663 * @phys_addr: physical address of device. 664 * 665 * Probe for a SA1111 chip. This must be called 666 * before any other SA1111-specific code. 667 * 668 * Returns: 669 * %-ENODEV device not found. 670 * %-EBUSY physical address already marked in-use. 671 * %0 successful. 672 */ 673 static int __devinit 674 __sa1111_probe(struct device *me, struct resource *mem, int irq) 675 { 676 struct sa1111 *sachip; 677 unsigned long id; 678 unsigned int has_devs; 679 int i, ret = -ENODEV; 680 681 sachip = kzalloc(sizeof(struct sa1111), GFP_KERNEL); 682 if (!sachip) 683 return -ENOMEM; 684 685 sachip->clk = clk_get(me, "SA1111_CLK"); 686 if (IS_ERR(sachip->clk)) { 687 ret = PTR_ERR(sachip->clk); 688 goto err_free; 689 } 690 691 spin_lock_init(&sachip->lock); 692 693 sachip->dev = me; 694 dev_set_drvdata(sachip->dev, sachip); 695 696 sachip->phys = mem->start; 697 sachip->irq = irq; 698 699 /* 700 * Map the whole region. This also maps the 701 * registers for our children. 702 */ 703 sachip->base = ioremap(mem->start, PAGE_SIZE * 2); 704 if (!sachip->base) { 705 ret = -ENOMEM; 706 goto err_clkput; 707 } 708 709 /* 710 * Probe for the chip. Only touch the SBI registers. 711 */ 712 id = sa1111_readl(sachip->base + SA1111_SKID); 713 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) { 714 printk(KERN_DEBUG "SA1111 not detected: ID = %08lx\n", id); 715 ret = -ENODEV; 716 goto err_unmap; 717 } 718 719 printk(KERN_INFO "SA1111 Microprocessor Companion Chip: " 720 "silicon revision %lx, metal revision %lx\n", 721 (id & SKID_SIREV_MASK)>>4, (id & SKID_MTREV_MASK)); 722 723 /* 724 * We found it. Wake the chip up, and initialise. 725 */ 726 sa1111_wake(sachip); 727 728 #ifdef CONFIG_ARCH_SA1100 729 { 730 unsigned int val; 731 732 /* 733 * The SDRAM configuration of the SA1110 and the SA1111 must 734 * match. This is very important to ensure that SA1111 accesses 735 * don't corrupt the SDRAM. Note that this ungates the SA1111's 736 * MBGNT signal, so we must have called sa1110_mb_disable() 737 * beforehand. 738 */ 739 sa1111_configure_smc(sachip, 1, 740 FExtr(MDCNFG, MDCNFG_SA1110_DRAC0), 741 FExtr(MDCNFG, MDCNFG_SA1110_TDL0)); 742 743 /* 744 * We only need to turn on DCLK whenever we want to use the 745 * DMA. It can otherwise be held firmly in the off position. 746 * (currently, we always enable it.) 747 */ 748 val = sa1111_readl(sachip->base + SA1111_SKPCR); 749 sa1111_writel(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR); 750 751 /* 752 * Enable the SA1110 memory bus request and grant signals. 753 */ 754 sa1110_mb_enable(); 755 } 756 #endif 757 758 /* 759 * The interrupt controller must be initialised before any 760 * other device to ensure that the interrupts are available. 761 */ 762 if (sachip->irq != NO_IRQ) 763 sa1111_setup_irq(sachip); 764 765 g_sa1111 = sachip; 766 767 has_devs = ~0; 768 if (machine_is_assabet() || machine_is_jornada720() || 769 machine_is_badge4()) 770 has_devs &= ~(1 << 4); 771 else 772 has_devs &= ~(1 << 1); 773 774 for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++) 775 if (has_devs & (1 << i)) 776 sa1111_init_one_child(sachip, mem, &sa1111_devices[i]); 777 778 return 0; 779 780 err_unmap: 781 iounmap(sachip->base); 782 err_clkput: 783 clk_put(sachip->clk); 784 err_free: 785 kfree(sachip); 786 return ret; 787 } 788 789 static int sa1111_remove_one(struct device *dev, void *data) 790 { 791 device_unregister(dev); 792 return 0; 793 } 794 795 static void __sa1111_remove(struct sa1111 *sachip) 796 { 797 void __iomem *irqbase = sachip->base + SA1111_INTC; 798 799 device_for_each_child(sachip->dev, NULL, sa1111_remove_one); 800 801 /* disable all IRQs */ 802 sa1111_writel(0, irqbase + SA1111_INTEN0); 803 sa1111_writel(0, irqbase + SA1111_INTEN1); 804 sa1111_writel(0, irqbase + SA1111_WAKEEN0); 805 sa1111_writel(0, irqbase + SA1111_WAKEEN1); 806 807 clk_disable(sachip->clk); 808 809 if (sachip->irq != NO_IRQ) { 810 irq_set_chained_handler(sachip->irq, NULL); 811 irq_set_handler_data(sachip->irq, NULL); 812 813 release_mem_region(sachip->phys + SA1111_INTC, 512); 814 } 815 816 iounmap(sachip->base); 817 clk_put(sachip->clk); 818 kfree(sachip); 819 } 820 821 /* 822 * According to the "Intel StrongARM SA-1111 Microprocessor Companion 823 * Chip Specification Update" (June 2000), erratum #7, there is a 824 * significant bug in the SA1111 SDRAM shared memory controller. If 825 * an access to a region of memory above 1MB relative to the bank base, 826 * it is important that address bit 10 _NOT_ be asserted. Depending 827 * on the configuration of the RAM, bit 10 may correspond to one 828 * of several different (processor-relative) address bits. 829 * 830 * This routine only identifies whether or not a given DMA address 831 * is susceptible to the bug. 832 * 833 * This should only get called for sa1111_device types due to the 834 * way we configure our device dma_masks. 835 */ 836 int dma_needs_bounce(struct device *dev, dma_addr_t addr, size_t size) 837 { 838 /* 839 * Section 4.6 of the "Intel StrongARM SA-1111 Development Module 840 * User's Guide" mentions that jumpers R51 and R52 control the 841 * target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or 842 * SDRAM bank 1 on Neponset). The default configuration selects 843 * Assabet, so any address in bank 1 is necessarily invalid. 844 */ 845 return ((machine_is_assabet() || machine_is_pfs168()) && 846 (addr >= 0xc8000000 || (addr + size) >= 0xc8000000)); 847 } 848 849 struct sa1111_save_data { 850 unsigned int skcr; 851 unsigned int skpcr; 852 unsigned int skcdr; 853 unsigned char skaud; 854 unsigned char skpwm0; 855 unsigned char skpwm1; 856 857 /* 858 * Interrupt controller 859 */ 860 unsigned int intpol0; 861 unsigned int intpol1; 862 unsigned int inten0; 863 unsigned int inten1; 864 unsigned int wakepol0; 865 unsigned int wakepol1; 866 unsigned int wakeen0; 867 unsigned int wakeen1; 868 }; 869 870 #ifdef CONFIG_PM 871 872 static int sa1111_suspend(struct platform_device *dev, pm_message_t state) 873 { 874 struct sa1111 *sachip = platform_get_drvdata(dev); 875 struct sa1111_save_data *save; 876 unsigned long flags; 877 unsigned int val; 878 void __iomem *base; 879 880 save = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL); 881 if (!save) 882 return -ENOMEM; 883 sachip->saved_state = save; 884 885 spin_lock_irqsave(&sachip->lock, flags); 886 887 /* 888 * Save state. 889 */ 890 base = sachip->base; 891 save->skcr = sa1111_readl(base + SA1111_SKCR); 892 save->skpcr = sa1111_readl(base + SA1111_SKPCR); 893 save->skcdr = sa1111_readl(base + SA1111_SKCDR); 894 save->skaud = sa1111_readl(base + SA1111_SKAUD); 895 save->skpwm0 = sa1111_readl(base + SA1111_SKPWM0); 896 save->skpwm1 = sa1111_readl(base + SA1111_SKPWM1); 897 898 base = sachip->base + SA1111_INTC; 899 save->intpol0 = sa1111_readl(base + SA1111_INTPOL0); 900 save->intpol1 = sa1111_readl(base + SA1111_INTPOL1); 901 save->inten0 = sa1111_readl(base + SA1111_INTEN0); 902 save->inten1 = sa1111_readl(base + SA1111_INTEN1); 903 save->wakepol0 = sa1111_readl(base + SA1111_WAKEPOL0); 904 save->wakepol1 = sa1111_readl(base + SA1111_WAKEPOL1); 905 save->wakeen0 = sa1111_readl(base + SA1111_WAKEEN0); 906 save->wakeen1 = sa1111_readl(base + SA1111_WAKEEN1); 907 908 /* 909 * Disable. 910 */ 911 val = sa1111_readl(sachip->base + SA1111_SKCR); 912 sa1111_writel(val | SKCR_SLEEP, sachip->base + SA1111_SKCR); 913 sa1111_writel(0, sachip->base + SA1111_SKPWM0); 914 sa1111_writel(0, sachip->base + SA1111_SKPWM1); 915 916 clk_disable(sachip->clk); 917 918 spin_unlock_irqrestore(&sachip->lock, flags); 919 920 return 0; 921 } 922 923 /* 924 * sa1111_resume - Restore the SA1111 device state. 925 * @dev: device to restore 926 * 927 * Restore the general state of the SA1111; clock control and 928 * interrupt controller. Other parts of the SA1111 must be 929 * restored by their respective drivers, and must be called 930 * via LDM after this function. 931 */ 932 static int sa1111_resume(struct platform_device *dev) 933 { 934 struct sa1111 *sachip = platform_get_drvdata(dev); 935 struct sa1111_save_data *save; 936 unsigned long flags, id; 937 void __iomem *base; 938 939 save = sachip->saved_state; 940 if (!save) 941 return 0; 942 943 /* 944 * Ensure that the SA1111 is still here. 945 * FIXME: shouldn't do this here. 946 */ 947 id = sa1111_readl(sachip->base + SA1111_SKID); 948 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) { 949 __sa1111_remove(sachip); 950 platform_set_drvdata(dev, NULL); 951 kfree(save); 952 return 0; 953 } 954 955 /* 956 * First of all, wake up the chip. 957 */ 958 sa1111_wake(sachip); 959 960 /* 961 * Only lock for write ops. Also, sa1111_wake must be called with 962 * released spinlock! 963 */ 964 spin_lock_irqsave(&sachip->lock, flags); 965 966 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN0); 967 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN1); 968 969 base = sachip->base; 970 sa1111_writel(save->skcr, base + SA1111_SKCR); 971 sa1111_writel(save->skpcr, base + SA1111_SKPCR); 972 sa1111_writel(save->skcdr, base + SA1111_SKCDR); 973 sa1111_writel(save->skaud, base + SA1111_SKAUD); 974 sa1111_writel(save->skpwm0, base + SA1111_SKPWM0); 975 sa1111_writel(save->skpwm1, base + SA1111_SKPWM1); 976 977 base = sachip->base + SA1111_INTC; 978 sa1111_writel(save->intpol0, base + SA1111_INTPOL0); 979 sa1111_writel(save->intpol1, base + SA1111_INTPOL1); 980 sa1111_writel(save->inten0, base + SA1111_INTEN0); 981 sa1111_writel(save->inten1, base + SA1111_INTEN1); 982 sa1111_writel(save->wakepol0, base + SA1111_WAKEPOL0); 983 sa1111_writel(save->wakepol1, base + SA1111_WAKEPOL1); 984 sa1111_writel(save->wakeen0, base + SA1111_WAKEEN0); 985 sa1111_writel(save->wakeen1, base + SA1111_WAKEEN1); 986 987 spin_unlock_irqrestore(&sachip->lock, flags); 988 989 sachip->saved_state = NULL; 990 kfree(save); 991 992 return 0; 993 } 994 995 #else 996 #define sa1111_suspend NULL 997 #define sa1111_resume NULL 998 #endif 999 1000 static int __devinit sa1111_probe(struct platform_device *pdev) 1001 { 1002 struct resource *mem; 1003 int irq; 1004 1005 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1006 if (!mem) 1007 return -EINVAL; 1008 irq = platform_get_irq(pdev, 0); 1009 if (irq < 0) 1010 return -ENXIO; 1011 1012 return __sa1111_probe(&pdev->dev, mem, irq); 1013 } 1014 1015 static int sa1111_remove(struct platform_device *pdev) 1016 { 1017 struct sa1111 *sachip = platform_get_drvdata(pdev); 1018 1019 if (sachip) { 1020 #ifdef CONFIG_PM 1021 kfree(sachip->saved_state); 1022 sachip->saved_state = NULL; 1023 #endif 1024 __sa1111_remove(sachip); 1025 platform_set_drvdata(pdev, NULL); 1026 } 1027 1028 return 0; 1029 } 1030 1031 /* 1032 * Not sure if this should be on the system bus or not yet. 1033 * We really want some way to register a system device at 1034 * the per-machine level, and then have this driver pick 1035 * up the registered devices. 1036 * 1037 * We also need to handle the SDRAM configuration for 1038 * PXA250/SA1110 machine classes. 1039 */ 1040 static struct platform_driver sa1111_device_driver = { 1041 .probe = sa1111_probe, 1042 .remove = sa1111_remove, 1043 .suspend = sa1111_suspend, 1044 .resume = sa1111_resume, 1045 .driver = { 1046 .name = "sa1111", 1047 }, 1048 }; 1049 1050 /* 1051 * Get the parent device driver (us) structure 1052 * from a child function device 1053 */ 1054 static inline struct sa1111 *sa1111_chip_driver(struct sa1111_dev *sadev) 1055 { 1056 return (struct sa1111 *)dev_get_drvdata(sadev->dev.parent); 1057 } 1058 1059 /* 1060 * The bits in the opdiv field are non-linear. 1061 */ 1062 static unsigned char opdiv_table[] = { 1, 4, 2, 8 }; 1063 1064 static unsigned int __sa1111_pll_clock(struct sa1111 *sachip) 1065 { 1066 unsigned int skcdr, fbdiv, ipdiv, opdiv; 1067 1068 skcdr = sa1111_readl(sachip->base + SA1111_SKCDR); 1069 1070 fbdiv = (skcdr & 0x007f) + 2; 1071 ipdiv = ((skcdr & 0x0f80) >> 7) + 2; 1072 opdiv = opdiv_table[(skcdr & 0x3000) >> 12]; 1073 1074 return 3686400 * fbdiv / (ipdiv * opdiv); 1075 } 1076 1077 /** 1078 * sa1111_pll_clock - return the current PLL clock frequency. 1079 * @sadev: SA1111 function block 1080 * 1081 * BUG: we should look at SKCR. We also blindly believe that 1082 * the chip is being fed with the 3.6864MHz clock. 1083 * 1084 * Returns the PLL clock in Hz. 1085 */ 1086 unsigned int sa1111_pll_clock(struct sa1111_dev *sadev) 1087 { 1088 struct sa1111 *sachip = sa1111_chip_driver(sadev); 1089 1090 return __sa1111_pll_clock(sachip); 1091 } 1092 EXPORT_SYMBOL(sa1111_pll_clock); 1093 1094 /** 1095 * sa1111_select_audio_mode - select I2S or AC link mode 1096 * @sadev: SA1111 function block 1097 * @mode: One of %SA1111_AUDIO_ACLINK or %SA1111_AUDIO_I2S 1098 * 1099 * Frob the SKCR to select AC Link mode or I2S mode for 1100 * the audio block. 1101 */ 1102 void sa1111_select_audio_mode(struct sa1111_dev *sadev, int mode) 1103 { 1104 struct sa1111 *sachip = sa1111_chip_driver(sadev); 1105 unsigned long flags; 1106 unsigned int val; 1107 1108 spin_lock_irqsave(&sachip->lock, flags); 1109 1110 val = sa1111_readl(sachip->base + SA1111_SKCR); 1111 if (mode == SA1111_AUDIO_I2S) { 1112 val &= ~SKCR_SELAC; 1113 } else { 1114 val |= SKCR_SELAC; 1115 } 1116 sa1111_writel(val, sachip->base + SA1111_SKCR); 1117 1118 spin_unlock_irqrestore(&sachip->lock, flags); 1119 } 1120 EXPORT_SYMBOL(sa1111_select_audio_mode); 1121 1122 /** 1123 * sa1111_set_audio_rate - set the audio sample rate 1124 * @sadev: SA1111 SAC function block 1125 * @rate: sample rate to select 1126 */ 1127 int sa1111_set_audio_rate(struct sa1111_dev *sadev, int rate) 1128 { 1129 struct sa1111 *sachip = sa1111_chip_driver(sadev); 1130 unsigned int div; 1131 1132 if (sadev->devid != SA1111_DEVID_SAC) 1133 return -EINVAL; 1134 1135 div = (__sa1111_pll_clock(sachip) / 256 + rate / 2) / rate; 1136 if (div == 0) 1137 div = 1; 1138 if (div > 128) 1139 div = 128; 1140 1141 sa1111_writel(div - 1, sachip->base + SA1111_SKAUD); 1142 1143 return 0; 1144 } 1145 EXPORT_SYMBOL(sa1111_set_audio_rate); 1146 1147 /** 1148 * sa1111_get_audio_rate - get the audio sample rate 1149 * @sadev: SA1111 SAC function block device 1150 */ 1151 int sa1111_get_audio_rate(struct sa1111_dev *sadev) 1152 { 1153 struct sa1111 *sachip = sa1111_chip_driver(sadev); 1154 unsigned long div; 1155 1156 if (sadev->devid != SA1111_DEVID_SAC) 1157 return -EINVAL; 1158 1159 div = sa1111_readl(sachip->base + SA1111_SKAUD) + 1; 1160 1161 return __sa1111_pll_clock(sachip) / (256 * div); 1162 } 1163 EXPORT_SYMBOL(sa1111_get_audio_rate); 1164 1165 void sa1111_set_io_dir(struct sa1111_dev *sadev, 1166 unsigned int bits, unsigned int dir, 1167 unsigned int sleep_dir) 1168 { 1169 struct sa1111 *sachip = sa1111_chip_driver(sadev); 1170 unsigned long flags; 1171 unsigned int val; 1172 void __iomem *gpio = sachip->base + SA1111_GPIO; 1173 1174 #define MODIFY_BITS(port, mask, dir) \ 1175 if (mask) { \ 1176 val = sa1111_readl(port); \ 1177 val &= ~(mask); \ 1178 val |= (dir) & (mask); \ 1179 sa1111_writel(val, port); \ 1180 } 1181 1182 spin_lock_irqsave(&sachip->lock, flags); 1183 MODIFY_BITS(gpio + SA1111_GPIO_PADDR, bits & 15, dir); 1184 MODIFY_BITS(gpio + SA1111_GPIO_PBDDR, (bits >> 8) & 255, dir >> 8); 1185 MODIFY_BITS(gpio + SA1111_GPIO_PCDDR, (bits >> 16) & 255, dir >> 16); 1186 1187 MODIFY_BITS(gpio + SA1111_GPIO_PASDR, bits & 15, sleep_dir); 1188 MODIFY_BITS(gpio + SA1111_GPIO_PBSDR, (bits >> 8) & 255, sleep_dir >> 8); 1189 MODIFY_BITS(gpio + SA1111_GPIO_PCSDR, (bits >> 16) & 255, sleep_dir >> 16); 1190 spin_unlock_irqrestore(&sachip->lock, flags); 1191 } 1192 EXPORT_SYMBOL(sa1111_set_io_dir); 1193 1194 void sa1111_set_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v) 1195 { 1196 struct sa1111 *sachip = sa1111_chip_driver(sadev); 1197 unsigned long flags; 1198 unsigned int val; 1199 void __iomem *gpio = sachip->base + SA1111_GPIO; 1200 1201 spin_lock_irqsave(&sachip->lock, flags); 1202 MODIFY_BITS(gpio + SA1111_GPIO_PADWR, bits & 15, v); 1203 MODIFY_BITS(gpio + SA1111_GPIO_PBDWR, (bits >> 8) & 255, v >> 8); 1204 MODIFY_BITS(gpio + SA1111_GPIO_PCDWR, (bits >> 16) & 255, v >> 16); 1205 spin_unlock_irqrestore(&sachip->lock, flags); 1206 } 1207 EXPORT_SYMBOL(sa1111_set_io); 1208 1209 void sa1111_set_sleep_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v) 1210 { 1211 struct sa1111 *sachip = sa1111_chip_driver(sadev); 1212 unsigned long flags; 1213 unsigned int val; 1214 void __iomem *gpio = sachip->base + SA1111_GPIO; 1215 1216 spin_lock_irqsave(&sachip->lock, flags); 1217 MODIFY_BITS(gpio + SA1111_GPIO_PASSR, bits & 15, v); 1218 MODIFY_BITS(gpio + SA1111_GPIO_PBSSR, (bits >> 8) & 255, v >> 8); 1219 MODIFY_BITS(gpio + SA1111_GPIO_PCSSR, (bits >> 16) & 255, v >> 16); 1220 spin_unlock_irqrestore(&sachip->lock, flags); 1221 } 1222 EXPORT_SYMBOL(sa1111_set_sleep_io); 1223 1224 /* 1225 * Individual device operations. 1226 */ 1227 1228 /** 1229 * sa1111_enable_device - enable an on-chip SA1111 function block 1230 * @sadev: SA1111 function block device to enable 1231 */ 1232 void sa1111_enable_device(struct sa1111_dev *sadev) 1233 { 1234 struct sa1111 *sachip = sa1111_chip_driver(sadev); 1235 unsigned long flags; 1236 unsigned int val; 1237 1238 spin_lock_irqsave(&sachip->lock, flags); 1239 val = sa1111_readl(sachip->base + SA1111_SKPCR); 1240 sa1111_writel(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR); 1241 spin_unlock_irqrestore(&sachip->lock, flags); 1242 } 1243 EXPORT_SYMBOL(sa1111_enable_device); 1244 1245 /** 1246 * sa1111_disable_device - disable an on-chip SA1111 function block 1247 * @sadev: SA1111 function block device to disable 1248 */ 1249 void sa1111_disable_device(struct sa1111_dev *sadev) 1250 { 1251 struct sa1111 *sachip = sa1111_chip_driver(sadev); 1252 unsigned long flags; 1253 unsigned int val; 1254 1255 spin_lock_irqsave(&sachip->lock, flags); 1256 val = sa1111_readl(sachip->base + SA1111_SKPCR); 1257 sa1111_writel(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR); 1258 spin_unlock_irqrestore(&sachip->lock, flags); 1259 } 1260 EXPORT_SYMBOL(sa1111_disable_device); 1261 1262 /* 1263 * SA1111 "Register Access Bus." 1264 * 1265 * We model this as a regular bus type, and hang devices directly 1266 * off this. 1267 */ 1268 static int sa1111_match(struct device *_dev, struct device_driver *_drv) 1269 { 1270 struct sa1111_dev *dev = SA1111_DEV(_dev); 1271 struct sa1111_driver *drv = SA1111_DRV(_drv); 1272 1273 return dev->devid == drv->devid; 1274 } 1275 1276 static int sa1111_bus_suspend(struct device *dev, pm_message_t state) 1277 { 1278 struct sa1111_dev *sadev = SA1111_DEV(dev); 1279 struct sa1111_driver *drv = SA1111_DRV(dev->driver); 1280 int ret = 0; 1281 1282 if (drv && drv->suspend) 1283 ret = drv->suspend(sadev, state); 1284 return ret; 1285 } 1286 1287 static int sa1111_bus_resume(struct device *dev) 1288 { 1289 struct sa1111_dev *sadev = SA1111_DEV(dev); 1290 struct sa1111_driver *drv = SA1111_DRV(dev->driver); 1291 int ret = 0; 1292 1293 if (drv && drv->resume) 1294 ret = drv->resume(sadev); 1295 return ret; 1296 } 1297 1298 static int sa1111_bus_probe(struct device *dev) 1299 { 1300 struct sa1111_dev *sadev = SA1111_DEV(dev); 1301 struct sa1111_driver *drv = SA1111_DRV(dev->driver); 1302 int ret = -ENODEV; 1303 1304 if (drv->probe) 1305 ret = drv->probe(sadev); 1306 return ret; 1307 } 1308 1309 static int sa1111_bus_remove(struct device *dev) 1310 { 1311 struct sa1111_dev *sadev = SA1111_DEV(dev); 1312 struct sa1111_driver *drv = SA1111_DRV(dev->driver); 1313 int ret = 0; 1314 1315 if (drv->remove) 1316 ret = drv->remove(sadev); 1317 return ret; 1318 } 1319 1320 struct bus_type sa1111_bus_type = { 1321 .name = "sa1111-rab", 1322 .match = sa1111_match, 1323 .probe = sa1111_bus_probe, 1324 .remove = sa1111_bus_remove, 1325 .suspend = sa1111_bus_suspend, 1326 .resume = sa1111_bus_resume, 1327 }; 1328 EXPORT_SYMBOL(sa1111_bus_type); 1329 1330 int sa1111_driver_register(struct sa1111_driver *driver) 1331 { 1332 driver->drv.bus = &sa1111_bus_type; 1333 return driver_register(&driver->drv); 1334 } 1335 EXPORT_SYMBOL(sa1111_driver_register); 1336 1337 void sa1111_driver_unregister(struct sa1111_driver *driver) 1338 { 1339 driver_unregister(&driver->drv); 1340 } 1341 EXPORT_SYMBOL(sa1111_driver_unregister); 1342 1343 static int __init sa1111_init(void) 1344 { 1345 int ret = bus_register(&sa1111_bus_type); 1346 if (ret == 0) 1347 platform_driver_register(&sa1111_device_driver); 1348 return ret; 1349 } 1350 1351 static void __exit sa1111_exit(void) 1352 { 1353 platform_driver_unregister(&sa1111_device_driver); 1354 bus_unregister(&sa1111_bus_type); 1355 } 1356 1357 subsys_initcall(sa1111_init); 1358 module_exit(sa1111_exit); 1359 1360 MODULE_DESCRIPTION("Intel Corporation SA1111 core driver"); 1361 MODULE_LICENSE("GPL"); 1362