1 /* 2 * Libata based driver for Apple "macio" family of PATA controllers 3 * 4 * Copyright 2008/2009 Benjamin Herrenschmidt, IBM Corp 5 * <benh@kernel.crashing.org> 6 * 7 * Some bits and pieces from drivers/ide/ppc/pmac.c 8 * 9 */ 10 11 #undef DEBUG 12 #undef DEBUG_DMA 13 14 #include <linux/kernel.h> 15 #include <linux/module.h> 16 #include <linux/init.h> 17 #include <linux/blkdev.h> 18 #include <linux/ata.h> 19 #include <linux/libata.h> 20 #include <linux/adb.h> 21 #include <linux/pmu.h> 22 #include <linux/scatterlist.h> 23 #include <linux/of.h> 24 #include <linux/gfp.h> 25 #include <linux/pci.h> 26 27 #include <scsi/scsi.h> 28 #include <scsi/scsi_host.h> 29 #include <scsi/scsi_device.h> 30 31 #include <asm/macio.h> 32 #include <asm/io.h> 33 #include <asm/dbdma.h> 34 #include <asm/machdep.h> 35 #include <asm/pmac_feature.h> 36 #include <asm/mediabay.h> 37 38 #ifdef DEBUG_DMA 39 #define dev_dbgdma(dev, format, arg...) \ 40 dev_printk(KERN_DEBUG , dev , format , ## arg) 41 #else 42 #define dev_dbgdma(dev, format, arg...) \ 43 ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) 44 #endif 45 46 #define DRV_NAME "pata_macio" 47 #define DRV_VERSION "0.9" 48 49 /* Models of macio ATA controller */ 50 enum { 51 controller_ohare, /* OHare based */ 52 controller_heathrow, /* Heathrow/Paddington */ 53 controller_kl_ata3, /* KeyLargo ATA-3 */ 54 controller_kl_ata4, /* KeyLargo ATA-4 */ 55 controller_un_ata6, /* UniNorth2 ATA-6 */ 56 controller_k2_ata6, /* K2 ATA-6 */ 57 controller_sh_ata6, /* Shasta ATA-6 */ 58 }; 59 60 static const char* macio_ata_names[] = { 61 "OHare ATA", /* OHare based */ 62 "Heathrow ATA", /* Heathrow/Paddington */ 63 "KeyLargo ATA-3", /* KeyLargo ATA-3 (MDMA only) */ 64 "KeyLargo ATA-4", /* KeyLargo ATA-4 (UDMA/66) */ 65 "UniNorth ATA-6", /* UniNorth2 ATA-6 (UDMA/100) */ 66 "K2 ATA-6", /* K2 ATA-6 (UDMA/100) */ 67 "Shasta ATA-6", /* Shasta ATA-6 (UDMA/133) */ 68 }; 69 70 /* 71 * Extra registers, both 32-bit little-endian 72 */ 73 #define IDE_TIMING_CONFIG 0x200 74 #define IDE_INTERRUPT 0x300 75 76 /* Kauai (U2) ATA has different register setup */ 77 #define IDE_KAUAI_PIO_CONFIG 0x200 78 #define IDE_KAUAI_ULTRA_CONFIG 0x210 79 #define IDE_KAUAI_POLL_CONFIG 0x220 80 81 /* 82 * Timing configuration register definitions 83 */ 84 85 /* Number of IDE_SYSCLK_NS ticks, argument is in nanoseconds */ 86 #define SYSCLK_TICKS(t) (((t) + IDE_SYSCLK_NS - 1) / IDE_SYSCLK_NS) 87 #define SYSCLK_TICKS_66(t) (((t) + IDE_SYSCLK_66_NS - 1) / IDE_SYSCLK_66_NS) 88 #define IDE_SYSCLK_NS 30 /* 33Mhz cell */ 89 #define IDE_SYSCLK_66_NS 15 /* 66Mhz cell */ 90 91 /* 133Mhz cell, found in shasta. 92 * See comments about 100 Mhz Uninorth 2... 93 * Note that PIO_MASK and MDMA_MASK seem to overlap, that's just 94 * weird and I don't now why .. at this stage 95 */ 96 #define TR_133_PIOREG_PIO_MASK 0xff000fff 97 #define TR_133_PIOREG_MDMA_MASK 0x00fff800 98 #define TR_133_UDMAREG_UDMA_MASK 0x0003ffff 99 #define TR_133_UDMAREG_UDMA_EN 0x00000001 100 101 /* 100Mhz cell, found in Uninorth 2 and K2. It appears as a pci device 102 * (106b/0033) on uninorth or K2 internal PCI bus and it's clock is 103 * controlled like gem or fw. It appears to be an evolution of keylargo 104 * ATA4 with a timing register extended to 2x32bits registers (one 105 * for PIO & MWDMA and one for UDMA, and a similar DBDMA channel. 106 * It has it's own local feature control register as well. 107 * 108 * After scratching my mind over the timing values, at least for PIO 109 * and MDMA, I think I've figured the format of the timing register, 110 * though I use pre-calculated tables for UDMA as usual... 111 */ 112 #define TR_100_PIO_ADDRSETUP_MASK 0xff000000 /* Size of field unknown */ 113 #define TR_100_PIO_ADDRSETUP_SHIFT 24 114 #define TR_100_MDMA_MASK 0x00fff000 115 #define TR_100_MDMA_RECOVERY_MASK 0x00fc0000 116 #define TR_100_MDMA_RECOVERY_SHIFT 18 117 #define TR_100_MDMA_ACCESS_MASK 0x0003f000 118 #define TR_100_MDMA_ACCESS_SHIFT 12 119 #define TR_100_PIO_MASK 0xff000fff 120 #define TR_100_PIO_RECOVERY_MASK 0x00000fc0 121 #define TR_100_PIO_RECOVERY_SHIFT 6 122 #define TR_100_PIO_ACCESS_MASK 0x0000003f 123 #define TR_100_PIO_ACCESS_SHIFT 0 124 125 #define TR_100_UDMAREG_UDMA_MASK 0x0000ffff 126 #define TR_100_UDMAREG_UDMA_EN 0x00000001 127 128 129 /* 66Mhz cell, found in KeyLargo. Can do ultra mode 0 to 2 on 130 * 40 connector cable and to 4 on 80 connector one. 131 * Clock unit is 15ns (66Mhz) 132 * 133 * 3 Values can be programmed: 134 * - Write data setup, which appears to match the cycle time. They 135 * also call it DIOW setup. 136 * - Ready to pause time (from spec) 137 * - Address setup. That one is weird. I don't see where exactly 138 * it fits in UDMA cycles, I got it's name from an obscure piece 139 * of commented out code in Darwin. They leave it to 0, we do as 140 * well, despite a comment that would lead to think it has a 141 * min value of 45ns. 142 * Apple also add 60ns to the write data setup (or cycle time ?) on 143 * reads. 144 */ 145 #define TR_66_UDMA_MASK 0xfff00000 146 #define TR_66_UDMA_EN 0x00100000 /* Enable Ultra mode for DMA */ 147 #define TR_66_PIO_ADDRSETUP_MASK 0xe0000000 /* Address setup */ 148 #define TR_66_PIO_ADDRSETUP_SHIFT 29 149 #define TR_66_UDMA_RDY2PAUS_MASK 0x1e000000 /* Ready 2 pause time */ 150 #define TR_66_UDMA_RDY2PAUS_SHIFT 25 151 #define TR_66_UDMA_WRDATASETUP_MASK 0x01e00000 /* Write data setup time */ 152 #define TR_66_UDMA_WRDATASETUP_SHIFT 21 153 #define TR_66_MDMA_MASK 0x000ffc00 154 #define TR_66_MDMA_RECOVERY_MASK 0x000f8000 155 #define TR_66_MDMA_RECOVERY_SHIFT 15 156 #define TR_66_MDMA_ACCESS_MASK 0x00007c00 157 #define TR_66_MDMA_ACCESS_SHIFT 10 158 #define TR_66_PIO_MASK 0xe00003ff 159 #define TR_66_PIO_RECOVERY_MASK 0x000003e0 160 #define TR_66_PIO_RECOVERY_SHIFT 5 161 #define TR_66_PIO_ACCESS_MASK 0x0000001f 162 #define TR_66_PIO_ACCESS_SHIFT 0 163 164 /* 33Mhz cell, found in OHare, Heathrow (& Paddington) and KeyLargo 165 * Can do pio & mdma modes, clock unit is 30ns (33Mhz) 166 * 167 * The access time and recovery time can be programmed. Some older 168 * Darwin code base limit OHare to 150ns cycle time. I decided to do 169 * the same here fore safety against broken old hardware ;) 170 * The HalfTick bit, when set, adds half a clock (15ns) to the access 171 * time and removes one from recovery. It's not supported on KeyLargo 172 * implementation afaik. The E bit appears to be set for PIO mode 0 and 173 * is used to reach long timings used in this mode. 174 */ 175 #define TR_33_MDMA_MASK 0x003ff800 176 #define TR_33_MDMA_RECOVERY_MASK 0x001f0000 177 #define TR_33_MDMA_RECOVERY_SHIFT 16 178 #define TR_33_MDMA_ACCESS_MASK 0x0000f800 179 #define TR_33_MDMA_ACCESS_SHIFT 11 180 #define TR_33_MDMA_HALFTICK 0x00200000 181 #define TR_33_PIO_MASK 0x000007ff 182 #define TR_33_PIO_E 0x00000400 183 #define TR_33_PIO_RECOVERY_MASK 0x000003e0 184 #define TR_33_PIO_RECOVERY_SHIFT 5 185 #define TR_33_PIO_ACCESS_MASK 0x0000001f 186 #define TR_33_PIO_ACCESS_SHIFT 0 187 188 /* 189 * Interrupt register definitions. Only present on newer cells 190 * (Keylargo and later afaik) so we don't use it. 191 */ 192 #define IDE_INTR_DMA 0x80000000 193 #define IDE_INTR_DEVICE 0x40000000 194 195 /* 196 * FCR Register on Kauai. Not sure what bit 0x4 is ... 197 */ 198 #define KAUAI_FCR_UATA_MAGIC 0x00000004 199 #define KAUAI_FCR_UATA_RESET_N 0x00000002 200 #define KAUAI_FCR_UATA_ENABLE 0x00000001 201 202 203 /* Allow up to 256 DBDMA commands per xfer */ 204 #define MAX_DCMDS 256 205 206 /* Don't let a DMA segment go all the way to 64K */ 207 #define MAX_DBDMA_SEG 0xff00 208 209 210 /* 211 * Wait 1s for disk to answer on IDE bus after a hard reset 212 * of the device (via GPIO/FCR). 213 * 214 * Some devices seem to "pollute" the bus even after dropping 215 * the BSY bit (typically some combo drives slave on the UDMA 216 * bus) after a hard reset. Since we hard reset all drives on 217 * KeyLargo ATA66, we have to keep that delay around. I may end 218 * up not hard resetting anymore on these and keep the delay only 219 * for older interfaces instead (we have to reset when coming 220 * from MacOS...) --BenH. 221 */ 222 #define IDE_WAKEUP_DELAY_MS 1000 223 224 struct pata_macio_timing; 225 226 struct pata_macio_priv { 227 int kind; 228 int aapl_bus_id; 229 int mediabay : 1; 230 struct device_node *node; 231 struct macio_dev *mdev; 232 struct pci_dev *pdev; 233 struct device *dev; 234 int irq; 235 u32 treg[2][2]; 236 void __iomem *tfregs; 237 void __iomem *kauai_fcr; 238 struct dbdma_cmd * dma_table_cpu; 239 dma_addr_t dma_table_dma; 240 struct ata_host *host; 241 const struct pata_macio_timing *timings; 242 }; 243 244 /* Previous variants of this driver used to calculate timings 245 * for various variants of the chip and use tables for others. 246 * 247 * Not only was this confusing, but in addition, it isn't clear 248 * whether our calculation code was correct. It didn't entirely 249 * match the darwin code and whatever documentation I could find 250 * on these cells 251 * 252 * I decided to entirely rely on a table instead for this version 253 * of the driver. Also, because I don't really care about derated 254 * modes and really old HW other than making it work, I'm not going 255 * to calculate / snoop timing values for something else than the 256 * standard modes. 257 */ 258 struct pata_macio_timing { 259 int mode; 260 u32 reg1; /* Bits to set in first timing reg */ 261 u32 reg2; /* Bits to set in second timing reg */ 262 }; 263 264 static const struct pata_macio_timing pata_macio_ohare_timings[] = { 265 { XFER_PIO_0, 0x00000526, 0, }, 266 { XFER_PIO_1, 0x00000085, 0, }, 267 { XFER_PIO_2, 0x00000025, 0, }, 268 { XFER_PIO_3, 0x00000025, 0, }, 269 { XFER_PIO_4, 0x00000025, 0, }, 270 { XFER_MW_DMA_0, 0x00074000, 0, }, 271 { XFER_MW_DMA_1, 0x00221000, 0, }, 272 { XFER_MW_DMA_2, 0x00211000, 0, }, 273 { -1, 0, 0 } 274 }; 275 276 static const struct pata_macio_timing pata_macio_heathrow_timings[] = { 277 { XFER_PIO_0, 0x00000526, 0, }, 278 { XFER_PIO_1, 0x00000085, 0, }, 279 { XFER_PIO_2, 0x00000025, 0, }, 280 { XFER_PIO_3, 0x00000025, 0, }, 281 { XFER_PIO_4, 0x00000025, 0, }, 282 { XFER_MW_DMA_0, 0x00074000, 0, }, 283 { XFER_MW_DMA_1, 0x00221000, 0, }, 284 { XFER_MW_DMA_2, 0x00211000, 0, }, 285 { -1, 0, 0 } 286 }; 287 288 static const struct pata_macio_timing pata_macio_kl33_timings[] = { 289 { XFER_PIO_0, 0x00000526, 0, }, 290 { XFER_PIO_1, 0x00000085, 0, }, 291 { XFER_PIO_2, 0x00000025, 0, }, 292 { XFER_PIO_3, 0x00000025, 0, }, 293 { XFER_PIO_4, 0x00000025, 0, }, 294 { XFER_MW_DMA_0, 0x00084000, 0, }, 295 { XFER_MW_DMA_1, 0x00021800, 0, }, 296 { XFER_MW_DMA_2, 0x00011800, 0, }, 297 { -1, 0, 0 } 298 }; 299 300 static const struct pata_macio_timing pata_macio_kl66_timings[] = { 301 { XFER_PIO_0, 0x0000038c, 0, }, 302 { XFER_PIO_1, 0x0000020a, 0, }, 303 { XFER_PIO_2, 0x00000127, 0, }, 304 { XFER_PIO_3, 0x000000c6, 0, }, 305 { XFER_PIO_4, 0x00000065, 0, }, 306 { XFER_MW_DMA_0, 0x00084000, 0, }, 307 { XFER_MW_DMA_1, 0x00029800, 0, }, 308 { XFER_MW_DMA_2, 0x00019400, 0, }, 309 { XFER_UDMA_0, 0x19100000, 0, }, 310 { XFER_UDMA_1, 0x14d00000, 0, }, 311 { XFER_UDMA_2, 0x10900000, 0, }, 312 { XFER_UDMA_3, 0x0c700000, 0, }, 313 { XFER_UDMA_4, 0x0c500000, 0, }, 314 { -1, 0, 0 } 315 }; 316 317 static const struct pata_macio_timing pata_macio_kauai_timings[] = { 318 { XFER_PIO_0, 0x08000a92, 0, }, 319 { XFER_PIO_1, 0x0800060f, 0, }, 320 { XFER_PIO_2, 0x0800038b, 0, }, 321 { XFER_PIO_3, 0x05000249, 0, }, 322 { XFER_PIO_4, 0x04000148, 0, }, 323 { XFER_MW_DMA_0, 0x00618000, 0, }, 324 { XFER_MW_DMA_1, 0x00209000, 0, }, 325 { XFER_MW_DMA_2, 0x00148000, 0, }, 326 { XFER_UDMA_0, 0, 0x000070c1, }, 327 { XFER_UDMA_1, 0, 0x00005d81, }, 328 { XFER_UDMA_2, 0, 0x00004a61, }, 329 { XFER_UDMA_3, 0, 0x00003a51, }, 330 { XFER_UDMA_4, 0, 0x00002a31, }, 331 { XFER_UDMA_5, 0, 0x00002921, }, 332 { -1, 0, 0 } 333 }; 334 335 static const struct pata_macio_timing pata_macio_shasta_timings[] = { 336 { XFER_PIO_0, 0x0a000c97, 0, }, 337 { XFER_PIO_1, 0x07000712, 0, }, 338 { XFER_PIO_2, 0x040003cd, 0, }, 339 { XFER_PIO_3, 0x0500028b, 0, }, 340 { XFER_PIO_4, 0x0400010a, 0, }, 341 { XFER_MW_DMA_0, 0x00820800, 0, }, 342 { XFER_MW_DMA_1, 0x0028b000, 0, }, 343 { XFER_MW_DMA_2, 0x001ca000, 0, }, 344 { XFER_UDMA_0, 0, 0x00035901, }, 345 { XFER_UDMA_1, 0, 0x000348b1, }, 346 { XFER_UDMA_2, 0, 0x00033881, }, 347 { XFER_UDMA_3, 0, 0x00033861, }, 348 { XFER_UDMA_4, 0, 0x00033841, }, 349 { XFER_UDMA_5, 0, 0x00033031, }, 350 { XFER_UDMA_6, 0, 0x00033021, }, 351 { -1, 0, 0 } 352 }; 353 354 static const struct pata_macio_timing *pata_macio_find_timing( 355 struct pata_macio_priv *priv, 356 int mode) 357 { 358 int i; 359 360 for (i = 0; priv->timings[i].mode > 0; i++) { 361 if (priv->timings[i].mode == mode) 362 return &priv->timings[i]; 363 } 364 return NULL; 365 } 366 367 368 static void pata_macio_apply_timings(struct ata_port *ap, unsigned int device) 369 { 370 struct pata_macio_priv *priv = ap->private_data; 371 void __iomem *rbase = ap->ioaddr.cmd_addr; 372 373 if (priv->kind == controller_sh_ata6 || 374 priv->kind == controller_un_ata6 || 375 priv->kind == controller_k2_ata6) { 376 writel(priv->treg[device][0], rbase + IDE_KAUAI_PIO_CONFIG); 377 writel(priv->treg[device][1], rbase + IDE_KAUAI_ULTRA_CONFIG); 378 } else 379 writel(priv->treg[device][0], rbase + IDE_TIMING_CONFIG); 380 } 381 382 static void pata_macio_dev_select(struct ata_port *ap, unsigned int device) 383 { 384 ata_sff_dev_select(ap, device); 385 386 /* Apply timings */ 387 pata_macio_apply_timings(ap, device); 388 } 389 390 static void pata_macio_set_timings(struct ata_port *ap, 391 struct ata_device *adev) 392 { 393 struct pata_macio_priv *priv = ap->private_data; 394 const struct pata_macio_timing *t; 395 396 dev_dbg(priv->dev, "Set timings: DEV=%d,PIO=0x%x (%s),DMA=0x%x (%s)\n", 397 adev->devno, 398 adev->pio_mode, 399 ata_mode_string(ata_xfer_mode2mask(adev->pio_mode)), 400 adev->dma_mode, 401 ata_mode_string(ata_xfer_mode2mask(adev->dma_mode))); 402 403 /* First clear timings */ 404 priv->treg[adev->devno][0] = priv->treg[adev->devno][1] = 0; 405 406 /* Now get the PIO timings */ 407 t = pata_macio_find_timing(priv, adev->pio_mode); 408 if (t == NULL) { 409 dev_warn(priv->dev, "Invalid PIO timing requested: 0x%x\n", 410 adev->pio_mode); 411 t = pata_macio_find_timing(priv, XFER_PIO_0); 412 } 413 BUG_ON(t == NULL); 414 415 /* PIO timings only ever use the first treg */ 416 priv->treg[adev->devno][0] |= t->reg1; 417 418 /* Now get DMA timings */ 419 t = pata_macio_find_timing(priv, adev->dma_mode); 420 if (t == NULL || (t->reg1 == 0 && t->reg2 == 0)) { 421 dev_dbg(priv->dev, "DMA timing not set yet, using MW_DMA_0\n"); 422 t = pata_macio_find_timing(priv, XFER_MW_DMA_0); 423 } 424 BUG_ON(t == NULL); 425 426 /* DMA timings can use both tregs */ 427 priv->treg[adev->devno][0] |= t->reg1; 428 priv->treg[adev->devno][1] |= t->reg2; 429 430 dev_dbg(priv->dev, " -> %08x %08x\n", 431 priv->treg[adev->devno][0], 432 priv->treg[adev->devno][1]); 433 434 /* Apply to hardware */ 435 pata_macio_apply_timings(ap, adev->devno); 436 } 437 438 /* 439 * Blast some well known "safe" values to the timing registers at init or 440 * wakeup from sleep time, before we do real calculation 441 */ 442 static void pata_macio_default_timings(struct pata_macio_priv *priv) 443 { 444 unsigned int value, value2 = 0; 445 446 switch(priv->kind) { 447 case controller_sh_ata6: 448 value = 0x0a820c97; 449 value2 = 0x00033031; 450 break; 451 case controller_un_ata6: 452 case controller_k2_ata6: 453 value = 0x08618a92; 454 value2 = 0x00002921; 455 break; 456 case controller_kl_ata4: 457 value = 0x0008438c; 458 break; 459 case controller_kl_ata3: 460 value = 0x00084526; 461 break; 462 case controller_heathrow: 463 case controller_ohare: 464 default: 465 value = 0x00074526; 466 break; 467 } 468 priv->treg[0][0] = priv->treg[1][0] = value; 469 priv->treg[0][1] = priv->treg[1][1] = value2; 470 } 471 472 static int pata_macio_cable_detect(struct ata_port *ap) 473 { 474 struct pata_macio_priv *priv = ap->private_data; 475 476 /* Get cable type from device-tree */ 477 if (priv->kind == controller_kl_ata4 || 478 priv->kind == controller_un_ata6 || 479 priv->kind == controller_k2_ata6 || 480 priv->kind == controller_sh_ata6) { 481 const char* cable = of_get_property(priv->node, "cable-type", 482 NULL); 483 struct device_node *root = of_find_node_by_path("/"); 484 const char *model = of_get_property(root, "model", NULL); 485 486 if (cable && !strncmp(cable, "80-", 3)) { 487 /* Some drives fail to detect 80c cable in PowerBook 488 * These machine use proprietary short IDE cable 489 * anyway 490 */ 491 if (!strncmp(model, "PowerBook", 9)) 492 return ATA_CBL_PATA40_SHORT; 493 else 494 return ATA_CBL_PATA80; 495 } 496 } 497 498 /* G5's seem to have incorrect cable type in device-tree. 499 * Let's assume they always have a 80 conductor cable, this seem to 500 * be always the case unless the user mucked around 501 */ 502 if (of_device_is_compatible(priv->node, "K2-UATA") || 503 of_device_is_compatible(priv->node, "shasta-ata")) 504 return ATA_CBL_PATA80; 505 506 /* Anything else is 40 connectors */ 507 return ATA_CBL_PATA40; 508 } 509 510 static void pata_macio_qc_prep(struct ata_queued_cmd *qc) 511 { 512 unsigned int write = (qc->tf.flags & ATA_TFLAG_WRITE); 513 struct ata_port *ap = qc->ap; 514 struct pata_macio_priv *priv = ap->private_data; 515 struct scatterlist *sg; 516 struct dbdma_cmd *table; 517 unsigned int si, pi; 518 519 dev_dbgdma(priv->dev, "%s: qc %p flags %lx, write %d dev %d\n", 520 __func__, qc, qc->flags, write, qc->dev->devno); 521 522 if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 523 return; 524 525 table = (struct dbdma_cmd *) priv->dma_table_cpu; 526 527 pi = 0; 528 for_each_sg(qc->sg, sg, qc->n_elem, si) { 529 u32 addr, sg_len, len; 530 531 /* determine if physical DMA addr spans 64K boundary. 532 * Note h/w doesn't support 64-bit, so we unconditionally 533 * truncate dma_addr_t to u32. 534 */ 535 addr = (u32) sg_dma_address(sg); 536 sg_len = sg_dma_len(sg); 537 538 while (sg_len) { 539 /* table overflow should never happen */ 540 BUG_ON (pi++ >= MAX_DCMDS); 541 542 len = (sg_len < MAX_DBDMA_SEG) ? sg_len : MAX_DBDMA_SEG; 543 table->command = cpu_to_le16(write ? OUTPUT_MORE: INPUT_MORE); 544 table->req_count = cpu_to_le16(len); 545 table->phy_addr = cpu_to_le32(addr); 546 table->cmd_dep = 0; 547 table->xfer_status = 0; 548 table->res_count = 0; 549 addr += len; 550 sg_len -= len; 551 ++table; 552 } 553 } 554 555 /* Should never happen according to Tejun */ 556 BUG_ON(!pi); 557 558 /* Convert the last command to an input/output */ 559 table--; 560 table->command = cpu_to_le16(write ? OUTPUT_LAST: INPUT_LAST); 561 table++; 562 563 /* Add the stop command to the end of the list */ 564 memset(table, 0, sizeof(struct dbdma_cmd)); 565 table->command = cpu_to_le16(DBDMA_STOP); 566 567 dev_dbgdma(priv->dev, "%s: %d DMA list entries\n", __func__, pi); 568 } 569 570 571 static void pata_macio_freeze(struct ata_port *ap) 572 { 573 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; 574 575 if (dma_regs) { 576 unsigned int timeout = 1000000; 577 578 /* Make sure DMA controller is stopped */ 579 writel((RUN|PAUSE|FLUSH|WAKE|DEAD) << 16, &dma_regs->control); 580 while (--timeout && (readl(&dma_regs->status) & RUN)) 581 udelay(1); 582 } 583 584 ata_sff_freeze(ap); 585 } 586 587 588 static void pata_macio_bmdma_setup(struct ata_queued_cmd *qc) 589 { 590 struct ata_port *ap = qc->ap; 591 struct pata_macio_priv *priv = ap->private_data; 592 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; 593 int dev = qc->dev->devno; 594 595 dev_dbgdma(priv->dev, "%s: qc %p\n", __func__, qc); 596 597 /* Make sure DMA commands updates are visible */ 598 writel(priv->dma_table_dma, &dma_regs->cmdptr); 599 600 /* On KeyLargo 66Mhz cell, we need to add 60ns to wrDataSetup on 601 * UDMA reads 602 */ 603 if (priv->kind == controller_kl_ata4 && 604 (priv->treg[dev][0] & TR_66_UDMA_EN)) { 605 void __iomem *rbase = ap->ioaddr.cmd_addr; 606 u32 reg = priv->treg[dev][0]; 607 608 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) 609 reg += 0x00800000; 610 writel(reg, rbase + IDE_TIMING_CONFIG); 611 } 612 613 /* issue r/w command */ 614 ap->ops->sff_exec_command(ap, &qc->tf); 615 } 616 617 static void pata_macio_bmdma_start(struct ata_queued_cmd *qc) 618 { 619 struct ata_port *ap = qc->ap; 620 struct pata_macio_priv *priv = ap->private_data; 621 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; 622 623 dev_dbgdma(priv->dev, "%s: qc %p\n", __func__, qc); 624 625 writel((RUN << 16) | RUN, &dma_regs->control); 626 /* Make sure it gets to the controller right now */ 627 (void)readl(&dma_regs->control); 628 } 629 630 static void pata_macio_bmdma_stop(struct ata_queued_cmd *qc) 631 { 632 struct ata_port *ap = qc->ap; 633 struct pata_macio_priv *priv = ap->private_data; 634 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; 635 unsigned int timeout = 1000000; 636 637 dev_dbgdma(priv->dev, "%s: qc %p\n", __func__, qc); 638 639 /* Stop the DMA engine and wait for it to full halt */ 640 writel (((RUN|WAKE|DEAD) << 16), &dma_regs->control); 641 while (--timeout && (readl(&dma_regs->status) & RUN)) 642 udelay(1); 643 } 644 645 static u8 pata_macio_bmdma_status(struct ata_port *ap) 646 { 647 struct pata_macio_priv *priv = ap->private_data; 648 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; 649 u32 dstat, rstat = ATA_DMA_INTR; 650 unsigned long timeout = 0; 651 652 dstat = readl(&dma_regs->status); 653 654 dev_dbgdma(priv->dev, "%s: dstat=%x\n", __func__, dstat); 655 656 /* We have two things to deal with here: 657 * 658 * - The dbdma won't stop if the command was started 659 * but completed with an error without transferring all 660 * datas. This happens when bad blocks are met during 661 * a multi-block transfer. 662 * 663 * - The dbdma fifo hasn't yet finished flushing to 664 * to system memory when the disk interrupt occurs. 665 * 666 */ 667 668 /* First check for errors */ 669 if ((dstat & (RUN|DEAD)) != RUN) 670 rstat |= ATA_DMA_ERR; 671 672 /* If ACTIVE is cleared, the STOP command has been hit and 673 * the transfer is complete. If not, we have to flush the 674 * channel. 675 */ 676 if ((dstat & ACTIVE) == 0) 677 return rstat; 678 679 dev_dbgdma(priv->dev, "%s: DMA still active, flushing...\n", __func__); 680 681 /* If dbdma didn't execute the STOP command yet, the 682 * active bit is still set. We consider that we aren't 683 * sharing interrupts (which is hopefully the case with 684 * those controllers) and so we just try to flush the 685 * channel for pending data in the fifo 686 */ 687 udelay(1); 688 writel((FLUSH << 16) | FLUSH, &dma_regs->control); 689 for (;;) { 690 udelay(1); 691 dstat = readl(&dma_regs->status); 692 if ((dstat & FLUSH) == 0) 693 break; 694 if (++timeout > 1000) { 695 dev_warn(priv->dev, "timeout flushing DMA\n"); 696 rstat |= ATA_DMA_ERR; 697 break; 698 } 699 } 700 return rstat; 701 } 702 703 /* port_start is when we allocate the DMA command list */ 704 static int pata_macio_port_start(struct ata_port *ap) 705 { 706 struct pata_macio_priv *priv = ap->private_data; 707 708 if (ap->ioaddr.bmdma_addr == NULL) 709 return 0; 710 711 /* Allocate space for the DBDMA commands. 712 * 713 * The +2 is +1 for the stop command and +1 to allow for 714 * aligning the start address to a multiple of 16 bytes. 715 */ 716 priv->dma_table_cpu = 717 dmam_alloc_coherent(priv->dev, 718 (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd), 719 &priv->dma_table_dma, GFP_KERNEL); 720 if (priv->dma_table_cpu == NULL) { 721 dev_err(priv->dev, "Unable to allocate DMA command list\n"); 722 ap->ioaddr.bmdma_addr = NULL; 723 ap->mwdma_mask = 0; 724 ap->udma_mask = 0; 725 } 726 return 0; 727 } 728 729 static void pata_macio_irq_clear(struct ata_port *ap) 730 { 731 struct pata_macio_priv *priv = ap->private_data; 732 733 /* Nothing to do here */ 734 735 dev_dbgdma(priv->dev, "%s\n", __func__); 736 } 737 738 static void pata_macio_reset_hw(struct pata_macio_priv *priv, int resume) 739 { 740 dev_dbg(priv->dev, "Enabling & resetting... \n"); 741 742 if (priv->mediabay) 743 return; 744 745 if (priv->kind == controller_ohare && !resume) { 746 /* The code below is having trouble on some ohare machines 747 * (timing related ?). Until I can put my hand on one of these 748 * units, I keep the old way 749 */ 750 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, priv->node, 0, 1); 751 } else { 752 int rc; 753 754 /* Reset and enable controller */ 755 rc = ppc_md.feature_call(PMAC_FTR_IDE_RESET, 756 priv->node, priv->aapl_bus_id, 1); 757 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, 758 priv->node, priv->aapl_bus_id, 1); 759 msleep(10); 760 /* Only bother waiting if there's a reset control */ 761 if (rc == 0) { 762 ppc_md.feature_call(PMAC_FTR_IDE_RESET, 763 priv->node, priv->aapl_bus_id, 0); 764 msleep(IDE_WAKEUP_DELAY_MS); 765 } 766 } 767 768 /* If resuming a PCI device, restore the config space here */ 769 if (priv->pdev && resume) { 770 int rc; 771 772 pci_restore_state(priv->pdev); 773 rc = pcim_enable_device(priv->pdev); 774 if (rc) 775 dev_err(&priv->pdev->dev, 776 "Failed to enable device after resume (%d)\n", 777 rc); 778 else 779 pci_set_master(priv->pdev); 780 } 781 782 /* On Kauai, initialize the FCR. We don't perform a reset, doesn't really 783 * seem necessary and speeds up the boot process 784 */ 785 if (priv->kauai_fcr) 786 writel(KAUAI_FCR_UATA_MAGIC | 787 KAUAI_FCR_UATA_RESET_N | 788 KAUAI_FCR_UATA_ENABLE, priv->kauai_fcr); 789 } 790 791 /* Hook the standard slave config to fixup some HW related alignment 792 * restrictions 793 */ 794 static int pata_macio_slave_config(struct scsi_device *sdev) 795 { 796 struct ata_port *ap = ata_shost_to_port(sdev->host); 797 struct pata_macio_priv *priv = ap->private_data; 798 struct ata_device *dev; 799 u16 cmd; 800 int rc; 801 802 /* First call original */ 803 rc = ata_scsi_slave_config(sdev); 804 if (rc) 805 return rc; 806 807 /* This is lifted from sata_nv */ 808 dev = &ap->link.device[sdev->id]; 809 810 /* OHare has issues with non cache aligned DMA on some chipsets */ 811 if (priv->kind == controller_ohare) { 812 blk_queue_update_dma_alignment(sdev->request_queue, 31); 813 blk_queue_update_dma_pad(sdev->request_queue, 31); 814 815 /* Tell the world about it */ 816 ata_dev_info(dev, "OHare alignment limits applied\n"); 817 return 0; 818 } 819 820 /* We only have issues with ATAPI */ 821 if (dev->class != ATA_DEV_ATAPI) 822 return 0; 823 824 /* Shasta and K2 seem to have "issues" with reads ... */ 825 if (priv->kind == controller_sh_ata6 || priv->kind == controller_k2_ata6) { 826 /* Allright these are bad, apply restrictions */ 827 blk_queue_update_dma_alignment(sdev->request_queue, 15); 828 blk_queue_update_dma_pad(sdev->request_queue, 15); 829 830 /* We enable MWI and hack cache line size directly here, this 831 * is specific to this chipset and not normal values, we happen 832 * to somewhat know what we are doing here (which is basically 833 * to do the same Apple does and pray they did not get it wrong :-) 834 */ 835 BUG_ON(!priv->pdev); 836 pci_write_config_byte(priv->pdev, PCI_CACHE_LINE_SIZE, 0x08); 837 pci_read_config_word(priv->pdev, PCI_COMMAND, &cmd); 838 pci_write_config_word(priv->pdev, PCI_COMMAND, 839 cmd | PCI_COMMAND_INVALIDATE); 840 841 /* Tell the world about it */ 842 ata_dev_info(dev, "K2/Shasta alignment limits applied\n"); 843 } 844 845 return 0; 846 } 847 848 #ifdef CONFIG_PM_SLEEP 849 static int pata_macio_do_suspend(struct pata_macio_priv *priv, pm_message_t mesg) 850 { 851 int rc; 852 853 /* First, core libata suspend to do most of the work */ 854 rc = ata_host_suspend(priv->host, mesg); 855 if (rc) 856 return rc; 857 858 /* Restore to default timings */ 859 pata_macio_default_timings(priv); 860 861 /* Mask interrupt. Not strictly necessary but old driver did 862 * it and I'd rather not change that here */ 863 disable_irq(priv->irq); 864 865 /* The media bay will handle itself just fine */ 866 if (priv->mediabay) 867 return 0; 868 869 /* Kauai has bus control FCRs directly here */ 870 if (priv->kauai_fcr) { 871 u32 fcr = readl(priv->kauai_fcr); 872 fcr &= ~(KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE); 873 writel(fcr, priv->kauai_fcr); 874 } 875 876 /* For PCI, save state and disable DMA. No need to call 877 * pci_set_power_state(), the HW doesn't do D states that 878 * way, the platform code will take care of suspending the 879 * ASIC properly 880 */ 881 if (priv->pdev) { 882 pci_save_state(priv->pdev); 883 pci_disable_device(priv->pdev); 884 } 885 886 /* Disable the bus on older machines and the cell on kauai */ 887 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, priv->node, 888 priv->aapl_bus_id, 0); 889 890 return 0; 891 } 892 893 static int pata_macio_do_resume(struct pata_macio_priv *priv) 894 { 895 /* Reset and re-enable the HW */ 896 pata_macio_reset_hw(priv, 1); 897 898 /* Sanitize drive timings */ 899 pata_macio_apply_timings(priv->host->ports[0], 0); 900 901 /* We want our IRQ back ! */ 902 enable_irq(priv->irq); 903 904 /* Let the libata core take it from there */ 905 ata_host_resume(priv->host); 906 907 return 0; 908 } 909 #endif /* CONFIG_PM_SLEEP */ 910 911 static struct scsi_host_template pata_macio_sht = { 912 ATA_BASE_SHT(DRV_NAME), 913 .sg_tablesize = MAX_DCMDS, 914 /* We may not need that strict one */ 915 .dma_boundary = ATA_DMA_BOUNDARY, 916 .slave_configure = pata_macio_slave_config, 917 }; 918 919 static struct ata_port_operations pata_macio_ops = { 920 .inherits = &ata_bmdma_port_ops, 921 922 .freeze = pata_macio_freeze, 923 .set_piomode = pata_macio_set_timings, 924 .set_dmamode = pata_macio_set_timings, 925 .cable_detect = pata_macio_cable_detect, 926 .sff_dev_select = pata_macio_dev_select, 927 .qc_prep = pata_macio_qc_prep, 928 .bmdma_setup = pata_macio_bmdma_setup, 929 .bmdma_start = pata_macio_bmdma_start, 930 .bmdma_stop = pata_macio_bmdma_stop, 931 .bmdma_status = pata_macio_bmdma_status, 932 .port_start = pata_macio_port_start, 933 .sff_irq_clear = pata_macio_irq_clear, 934 }; 935 936 static void pata_macio_invariants(struct pata_macio_priv *priv) 937 { 938 const int *bidp; 939 940 /* Identify the type of controller */ 941 if (of_device_is_compatible(priv->node, "shasta-ata")) { 942 priv->kind = controller_sh_ata6; 943 priv->timings = pata_macio_shasta_timings; 944 } else if (of_device_is_compatible(priv->node, "kauai-ata")) { 945 priv->kind = controller_un_ata6; 946 priv->timings = pata_macio_kauai_timings; 947 } else if (of_device_is_compatible(priv->node, "K2-UATA")) { 948 priv->kind = controller_k2_ata6; 949 priv->timings = pata_macio_kauai_timings; 950 } else if (of_device_is_compatible(priv->node, "keylargo-ata")) { 951 if (strcmp(priv->node->name, "ata-4") == 0) { 952 priv->kind = controller_kl_ata4; 953 priv->timings = pata_macio_kl66_timings; 954 } else { 955 priv->kind = controller_kl_ata3; 956 priv->timings = pata_macio_kl33_timings; 957 } 958 } else if (of_device_is_compatible(priv->node, "heathrow-ata")) { 959 priv->kind = controller_heathrow; 960 priv->timings = pata_macio_heathrow_timings; 961 } else { 962 priv->kind = controller_ohare; 963 priv->timings = pata_macio_ohare_timings; 964 } 965 966 /* XXX FIXME --- setup priv->mediabay here */ 967 968 /* Get Apple bus ID (for clock and ASIC control) */ 969 bidp = of_get_property(priv->node, "AAPL,bus-id", NULL); 970 priv->aapl_bus_id = bidp ? *bidp : 0; 971 972 /* Fixup missing Apple bus ID in case of media-bay */ 973 if (priv->mediabay && bidp == 0) 974 priv->aapl_bus_id = 1; 975 } 976 977 static void pata_macio_setup_ios(struct ata_ioports *ioaddr, 978 void __iomem * base, void __iomem * dma) 979 { 980 /* cmd_addr is the base of regs for that port */ 981 ioaddr->cmd_addr = base; 982 983 /* taskfile registers */ 984 ioaddr->data_addr = base + (ATA_REG_DATA << 4); 985 ioaddr->error_addr = base + (ATA_REG_ERR << 4); 986 ioaddr->feature_addr = base + (ATA_REG_FEATURE << 4); 987 ioaddr->nsect_addr = base + (ATA_REG_NSECT << 4); 988 ioaddr->lbal_addr = base + (ATA_REG_LBAL << 4); 989 ioaddr->lbam_addr = base + (ATA_REG_LBAM << 4); 990 ioaddr->lbah_addr = base + (ATA_REG_LBAH << 4); 991 ioaddr->device_addr = base + (ATA_REG_DEVICE << 4); 992 ioaddr->status_addr = base + (ATA_REG_STATUS << 4); 993 ioaddr->command_addr = base + (ATA_REG_CMD << 4); 994 ioaddr->altstatus_addr = base + 0x160; 995 ioaddr->ctl_addr = base + 0x160; 996 ioaddr->bmdma_addr = dma; 997 } 998 999 static void pmac_macio_calc_timing_masks(struct pata_macio_priv *priv, 1000 struct ata_port_info *pinfo) 1001 { 1002 int i = 0; 1003 1004 pinfo->pio_mask = 0; 1005 pinfo->mwdma_mask = 0; 1006 pinfo->udma_mask = 0; 1007 1008 while (priv->timings[i].mode > 0) { 1009 unsigned int mask = 1U << (priv->timings[i].mode & 0x0f); 1010 switch(priv->timings[i].mode & 0xf0) { 1011 case 0x00: /* PIO */ 1012 pinfo->pio_mask |= (mask >> 8); 1013 break; 1014 case 0x20: /* MWDMA */ 1015 pinfo->mwdma_mask |= mask; 1016 break; 1017 case 0x40: /* UDMA */ 1018 pinfo->udma_mask |= mask; 1019 break; 1020 } 1021 i++; 1022 } 1023 dev_dbg(priv->dev, "Supported masks: PIO=%lx, MWDMA=%lx, UDMA=%lx\n", 1024 pinfo->pio_mask, pinfo->mwdma_mask, pinfo->udma_mask); 1025 } 1026 1027 static int pata_macio_common_init(struct pata_macio_priv *priv, 1028 resource_size_t tfregs, 1029 resource_size_t dmaregs, 1030 resource_size_t fcregs, 1031 unsigned long irq) 1032 { 1033 struct ata_port_info pinfo; 1034 const struct ata_port_info *ppi[] = { &pinfo, NULL }; 1035 void __iomem *dma_regs = NULL; 1036 1037 /* Fill up privates with various invariants collected from the 1038 * device-tree 1039 */ 1040 pata_macio_invariants(priv); 1041 1042 /* Make sure we have sane initial timings in the cache */ 1043 pata_macio_default_timings(priv); 1044 1045 /* Not sure what the real max is but we know it's less than 64K, let's 1046 * use 64K minus 256 1047 */ 1048 dma_set_max_seg_size(priv->dev, MAX_DBDMA_SEG); 1049 1050 /* Allocate libata host for 1 port */ 1051 memset(&pinfo, 0, sizeof(struct ata_port_info)); 1052 pmac_macio_calc_timing_masks(priv, &pinfo); 1053 pinfo.flags = ATA_FLAG_SLAVE_POSS; 1054 pinfo.port_ops = &pata_macio_ops; 1055 pinfo.private_data = priv; 1056 1057 priv->host = ata_host_alloc_pinfo(priv->dev, ppi, 1); 1058 if (priv->host == NULL) { 1059 dev_err(priv->dev, "Failed to allocate ATA port structure\n"); 1060 return -ENOMEM; 1061 } 1062 1063 /* Setup the private data in host too */ 1064 priv->host->private_data = priv; 1065 1066 /* Map base registers */ 1067 priv->tfregs = devm_ioremap(priv->dev, tfregs, 0x100); 1068 if (priv->tfregs == NULL) { 1069 dev_err(priv->dev, "Failed to map ATA ports\n"); 1070 return -ENOMEM; 1071 } 1072 priv->host->iomap = &priv->tfregs; 1073 1074 /* Map DMA regs */ 1075 if (dmaregs != 0) { 1076 dma_regs = devm_ioremap(priv->dev, dmaregs, 1077 sizeof(struct dbdma_regs)); 1078 if (dma_regs == NULL) 1079 dev_warn(priv->dev, "Failed to map ATA DMA registers\n"); 1080 } 1081 1082 /* If chip has local feature control, map those regs too */ 1083 if (fcregs != 0) { 1084 priv->kauai_fcr = devm_ioremap(priv->dev, fcregs, 4); 1085 if (priv->kauai_fcr == NULL) { 1086 dev_err(priv->dev, "Failed to map ATA FCR register\n"); 1087 return -ENOMEM; 1088 } 1089 } 1090 1091 /* Setup port data structure */ 1092 pata_macio_setup_ios(&priv->host->ports[0]->ioaddr, 1093 priv->tfregs, dma_regs); 1094 priv->host->ports[0]->private_data = priv; 1095 1096 /* hard-reset the controller */ 1097 pata_macio_reset_hw(priv, 0); 1098 pata_macio_apply_timings(priv->host->ports[0], 0); 1099 1100 /* Enable bus master if necessary */ 1101 if (priv->pdev && dma_regs) 1102 pci_set_master(priv->pdev); 1103 1104 dev_info(priv->dev, "Activating pata-macio chipset %s, Apple bus ID %d\n", 1105 macio_ata_names[priv->kind], priv->aapl_bus_id); 1106 1107 /* Start it up */ 1108 priv->irq = irq; 1109 return ata_host_activate(priv->host, irq, ata_bmdma_interrupt, 0, 1110 &pata_macio_sht); 1111 } 1112 1113 static int pata_macio_attach(struct macio_dev *mdev, 1114 const struct of_device_id *match) 1115 { 1116 struct pata_macio_priv *priv; 1117 resource_size_t tfregs, dmaregs = 0; 1118 unsigned long irq; 1119 int rc; 1120 1121 /* Check for broken device-trees */ 1122 if (macio_resource_count(mdev) == 0) { 1123 dev_err(&mdev->ofdev.dev, 1124 "No addresses for controller\n"); 1125 return -ENXIO; 1126 } 1127 1128 /* Enable managed resources */ 1129 macio_enable_devres(mdev); 1130 1131 /* Allocate and init private data structure */ 1132 priv = devm_kzalloc(&mdev->ofdev.dev, 1133 sizeof(struct pata_macio_priv), GFP_KERNEL); 1134 if (priv == NULL) { 1135 dev_err(&mdev->ofdev.dev, 1136 "Failed to allocate private memory\n"); 1137 return -ENOMEM; 1138 } 1139 priv->node = of_node_get(mdev->ofdev.dev.of_node); 1140 priv->mdev = mdev; 1141 priv->dev = &mdev->ofdev.dev; 1142 1143 /* Request memory resource for taskfile registers */ 1144 if (macio_request_resource(mdev, 0, "pata-macio")) { 1145 dev_err(&mdev->ofdev.dev, 1146 "Cannot obtain taskfile resource\n"); 1147 return -EBUSY; 1148 } 1149 tfregs = macio_resource_start(mdev, 0); 1150 1151 /* Request resources for DMA registers if any */ 1152 if (macio_resource_count(mdev) >= 2) { 1153 if (macio_request_resource(mdev, 1, "pata-macio-dma")) 1154 dev_err(&mdev->ofdev.dev, 1155 "Cannot obtain DMA resource\n"); 1156 else 1157 dmaregs = macio_resource_start(mdev, 1); 1158 } 1159 1160 /* 1161 * Fixup missing IRQ for some old implementations with broken 1162 * device-trees. 1163 * 1164 * This is a bit bogus, it should be fixed in the device-tree itself, 1165 * via the existing macio fixups, based on the type of interrupt 1166 * controller in the machine. However, I have no test HW for this case, 1167 * and this trick works well enough on those old machines... 1168 */ 1169 if (macio_irq_count(mdev) == 0) { 1170 dev_warn(&mdev->ofdev.dev, 1171 "No interrupts for controller, using 13\n"); 1172 irq = irq_create_mapping(NULL, 13); 1173 } else 1174 irq = macio_irq(mdev, 0); 1175 1176 /* Prevvent media bay callbacks until fully registered */ 1177 lock_media_bay(priv->mdev->media_bay); 1178 1179 /* Get register addresses and call common initialization */ 1180 rc = pata_macio_common_init(priv, 1181 tfregs, /* Taskfile regs */ 1182 dmaregs, /* DBDMA regs */ 1183 0, /* Feature control */ 1184 irq); 1185 unlock_media_bay(priv->mdev->media_bay); 1186 1187 return rc; 1188 } 1189 1190 static int pata_macio_detach(struct macio_dev *mdev) 1191 { 1192 struct ata_host *host = macio_get_drvdata(mdev); 1193 struct pata_macio_priv *priv = host->private_data; 1194 1195 lock_media_bay(priv->mdev->media_bay); 1196 1197 /* Make sure the mediabay callback doesn't try to access 1198 * dead stuff 1199 */ 1200 priv->host->private_data = NULL; 1201 1202 ata_host_detach(host); 1203 1204 unlock_media_bay(priv->mdev->media_bay); 1205 1206 return 0; 1207 } 1208 1209 #ifdef CONFIG_PM_SLEEP 1210 static int pata_macio_suspend(struct macio_dev *mdev, pm_message_t mesg) 1211 { 1212 struct ata_host *host = macio_get_drvdata(mdev); 1213 1214 return pata_macio_do_suspend(host->private_data, mesg); 1215 } 1216 1217 static int pata_macio_resume(struct macio_dev *mdev) 1218 { 1219 struct ata_host *host = macio_get_drvdata(mdev); 1220 1221 return pata_macio_do_resume(host->private_data); 1222 } 1223 #endif /* CONFIG_PM_SLEEP */ 1224 1225 #ifdef CONFIG_PMAC_MEDIABAY 1226 static void pata_macio_mb_event(struct macio_dev* mdev, int mb_state) 1227 { 1228 struct ata_host *host = macio_get_drvdata(mdev); 1229 struct ata_port *ap; 1230 struct ata_eh_info *ehi; 1231 struct ata_device *dev; 1232 unsigned long flags; 1233 1234 if (!host || !host->private_data) 1235 return; 1236 ap = host->ports[0]; 1237 spin_lock_irqsave(ap->lock, flags); 1238 ehi = &ap->link.eh_info; 1239 if (mb_state == MB_CD) { 1240 ata_ehi_push_desc(ehi, "mediabay plug"); 1241 ata_ehi_hotplugged(ehi); 1242 ata_port_freeze(ap); 1243 } else { 1244 ata_ehi_push_desc(ehi, "mediabay unplug"); 1245 ata_for_each_dev(dev, &ap->link, ALL) 1246 dev->flags |= ATA_DFLAG_DETACH; 1247 ata_port_abort(ap); 1248 } 1249 spin_unlock_irqrestore(ap->lock, flags); 1250 1251 } 1252 #endif /* CONFIG_PMAC_MEDIABAY */ 1253 1254 1255 static int pata_macio_pci_attach(struct pci_dev *pdev, 1256 const struct pci_device_id *id) 1257 { 1258 struct pata_macio_priv *priv; 1259 struct device_node *np; 1260 resource_size_t rbase; 1261 1262 /* We cannot use a MacIO controller without its OF device node */ 1263 np = pci_device_to_OF_node(pdev); 1264 if (np == NULL) { 1265 dev_err(&pdev->dev, 1266 "Cannot find OF device node for controller\n"); 1267 return -ENODEV; 1268 } 1269 1270 /* Check that it can be enabled */ 1271 if (pcim_enable_device(pdev)) { 1272 dev_err(&pdev->dev, 1273 "Cannot enable controller PCI device\n"); 1274 return -ENXIO; 1275 } 1276 1277 /* Allocate and init private data structure */ 1278 priv = devm_kzalloc(&pdev->dev, 1279 sizeof(struct pata_macio_priv), GFP_KERNEL); 1280 if (priv == NULL) { 1281 dev_err(&pdev->dev, 1282 "Failed to allocate private memory\n"); 1283 return -ENOMEM; 1284 } 1285 priv->node = of_node_get(np); 1286 priv->pdev = pdev; 1287 priv->dev = &pdev->dev; 1288 1289 /* Get MMIO regions */ 1290 if (pci_request_regions(pdev, "pata-macio")) { 1291 dev_err(&pdev->dev, 1292 "Cannot obtain PCI resources\n"); 1293 return -EBUSY; 1294 } 1295 1296 /* Get register addresses and call common initialization */ 1297 rbase = pci_resource_start(pdev, 0); 1298 if (pata_macio_common_init(priv, 1299 rbase + 0x2000, /* Taskfile regs */ 1300 rbase + 0x1000, /* DBDMA regs */ 1301 rbase, /* Feature control */ 1302 pdev->irq)) 1303 return -ENXIO; 1304 1305 return 0; 1306 } 1307 1308 static void pata_macio_pci_detach(struct pci_dev *pdev) 1309 { 1310 struct ata_host *host = pci_get_drvdata(pdev); 1311 1312 ata_host_detach(host); 1313 } 1314 1315 #ifdef CONFIG_PM_SLEEP 1316 static int pata_macio_pci_suspend(struct pci_dev *pdev, pm_message_t mesg) 1317 { 1318 struct ata_host *host = pci_get_drvdata(pdev); 1319 1320 return pata_macio_do_suspend(host->private_data, mesg); 1321 } 1322 1323 static int pata_macio_pci_resume(struct pci_dev *pdev) 1324 { 1325 struct ata_host *host = pci_get_drvdata(pdev); 1326 1327 return pata_macio_do_resume(host->private_data); 1328 } 1329 #endif /* CONFIG_PM_SLEEP */ 1330 1331 static const struct of_device_id pata_macio_match[] = 1332 { 1333 { 1334 .name = "IDE", 1335 }, 1336 { 1337 .name = "ATA", 1338 }, 1339 { 1340 .type = "ide", 1341 }, 1342 { 1343 .type = "ata", 1344 }, 1345 {}, 1346 }; 1347 MODULE_DEVICE_TABLE(of, pata_macio_match); 1348 1349 static struct macio_driver pata_macio_driver = 1350 { 1351 .driver = { 1352 .name = "pata-macio", 1353 .owner = THIS_MODULE, 1354 .of_match_table = pata_macio_match, 1355 }, 1356 .probe = pata_macio_attach, 1357 .remove = pata_macio_detach, 1358 #ifdef CONFIG_PM_SLEEP 1359 .suspend = pata_macio_suspend, 1360 .resume = pata_macio_resume, 1361 #endif 1362 #ifdef CONFIG_PMAC_MEDIABAY 1363 .mediabay_event = pata_macio_mb_event, 1364 #endif 1365 }; 1366 1367 static const struct pci_device_id pata_macio_pci_match[] = { 1368 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_UNI_N_ATA), 0 }, 1369 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100), 0 }, 1370 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100), 0 }, 1371 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_SH_ATA), 0 }, 1372 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID2_ATA), 0 }, 1373 {}, 1374 }; 1375 1376 static struct pci_driver pata_macio_pci_driver = { 1377 .name = "pata-pci-macio", 1378 .id_table = pata_macio_pci_match, 1379 .probe = pata_macio_pci_attach, 1380 .remove = pata_macio_pci_detach, 1381 #ifdef CONFIG_PM_SLEEP 1382 .suspend = pata_macio_pci_suspend, 1383 .resume = pata_macio_pci_resume, 1384 #endif 1385 .driver = { 1386 .owner = THIS_MODULE, 1387 }, 1388 }; 1389 MODULE_DEVICE_TABLE(pci, pata_macio_pci_match); 1390 1391 1392 static int __init pata_macio_init(void) 1393 { 1394 int rc; 1395 1396 if (!machine_is(powermac)) 1397 return -ENODEV; 1398 1399 rc = pci_register_driver(&pata_macio_pci_driver); 1400 if (rc) 1401 return rc; 1402 rc = macio_register_driver(&pata_macio_driver); 1403 if (rc) { 1404 pci_unregister_driver(&pata_macio_pci_driver); 1405 return rc; 1406 } 1407 return 0; 1408 } 1409 1410 static void __exit pata_macio_exit(void) 1411 { 1412 macio_unregister_driver(&pata_macio_driver); 1413 pci_unregister_driver(&pata_macio_pci_driver); 1414 } 1415 1416 module_init(pata_macio_init); 1417 module_exit(pata_macio_exit); 1418 1419 MODULE_AUTHOR("Benjamin Herrenschmidt"); 1420 MODULE_DESCRIPTION("Apple MacIO PATA driver"); 1421 MODULE_LICENSE("GPL"); 1422 MODULE_VERSION(DRV_VERSION); 1423