1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Libata based driver for Apple "macio" family of PATA controllers 4 * 5 * Copyright 2008/2009 Benjamin Herrenschmidt, IBM Corp 6 * <benh@kernel.crashing.org> 7 * 8 * Some bits and pieces from drivers/ide/ppc/pmac.c 9 * 10 */ 11 12 #undef DEBUG 13 #undef DEBUG_DMA 14 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/init.h> 18 #include <linux/blkdev.h> 19 #include <linux/ata.h> 20 #include <linux/libata.h> 21 #include <linux/adb.h> 22 #include <linux/pmu.h> 23 #include <linux/scatterlist.h> 24 #include <linux/of.h> 25 #include <linux/gfp.h> 26 #include <linux/pci.h> 27 28 #include <scsi/scsi.h> 29 #include <scsi/scsi_host.h> 30 #include <scsi/scsi_device.h> 31 32 #include <asm/macio.h> 33 #include <asm/io.h> 34 #include <asm/dbdma.h> 35 #include <asm/machdep.h> 36 #include <asm/pmac_feature.h> 37 #include <asm/mediabay.h> 38 39 #ifdef DEBUG_DMA 40 #define dev_dbgdma(dev, format, arg...) \ 41 dev_printk(KERN_DEBUG , dev , format , ## arg) 42 #else 43 #define dev_dbgdma(dev, format, arg...) \ 44 ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) 45 #endif 46 47 #define DRV_NAME "pata_macio" 48 #define DRV_VERSION "0.9" 49 50 /* Models of macio ATA controller */ 51 enum { 52 controller_ohare, /* OHare based */ 53 controller_heathrow, /* Heathrow/Paddington */ 54 controller_kl_ata3, /* KeyLargo ATA-3 */ 55 controller_kl_ata4, /* KeyLargo ATA-4 */ 56 controller_un_ata6, /* UniNorth2 ATA-6 */ 57 controller_k2_ata6, /* K2 ATA-6 */ 58 controller_sh_ata6, /* Shasta ATA-6 */ 59 }; 60 61 static const char* macio_ata_names[] = { 62 "OHare ATA", /* OHare based */ 63 "Heathrow ATA", /* Heathrow/Paddington */ 64 "KeyLargo ATA-3", /* KeyLargo ATA-3 (MDMA only) */ 65 "KeyLargo ATA-4", /* KeyLargo ATA-4 (UDMA/66) */ 66 "UniNorth ATA-6", /* UniNorth2 ATA-6 (UDMA/100) */ 67 "K2 ATA-6", /* K2 ATA-6 (UDMA/100) */ 68 "Shasta ATA-6", /* Shasta ATA-6 (UDMA/133) */ 69 }; 70 71 /* 72 * Extra registers, both 32-bit little-endian 73 */ 74 #define IDE_TIMING_CONFIG 0x200 75 #define IDE_INTERRUPT 0x300 76 77 /* Kauai (U2) ATA has different register setup */ 78 #define IDE_KAUAI_PIO_CONFIG 0x200 79 #define IDE_KAUAI_ULTRA_CONFIG 0x210 80 #define IDE_KAUAI_POLL_CONFIG 0x220 81 82 /* 83 * Timing configuration register definitions 84 */ 85 86 /* Number of IDE_SYSCLK_NS ticks, argument is in nanoseconds */ 87 #define SYSCLK_TICKS(t) (((t) + IDE_SYSCLK_NS - 1) / IDE_SYSCLK_NS) 88 #define SYSCLK_TICKS_66(t) (((t) + IDE_SYSCLK_66_NS - 1) / IDE_SYSCLK_66_NS) 89 #define IDE_SYSCLK_NS 30 /* 33Mhz cell */ 90 #define IDE_SYSCLK_66_NS 15 /* 66Mhz cell */ 91 92 /* 133Mhz cell, found in shasta. 93 * See comments about 100 Mhz Uninorth 2... 94 * Note that PIO_MASK and MDMA_MASK seem to overlap, that's just 95 * weird and I don't now why .. at this stage 96 */ 97 #define TR_133_PIOREG_PIO_MASK 0xff000fff 98 #define TR_133_PIOREG_MDMA_MASK 0x00fff800 99 #define TR_133_UDMAREG_UDMA_MASK 0x0003ffff 100 #define TR_133_UDMAREG_UDMA_EN 0x00000001 101 102 /* 100Mhz cell, found in Uninorth 2 and K2. It appears as a pci device 103 * (106b/0033) on uninorth or K2 internal PCI bus and it's clock is 104 * controlled like gem or fw. It appears to be an evolution of keylargo 105 * ATA4 with a timing register extended to 2x32bits registers (one 106 * for PIO & MWDMA and one for UDMA, and a similar DBDMA channel. 107 * It has it's own local feature control register as well. 108 * 109 * After scratching my mind over the timing values, at least for PIO 110 * and MDMA, I think I've figured the format of the timing register, 111 * though I use pre-calculated tables for UDMA as usual... 112 */ 113 #define TR_100_PIO_ADDRSETUP_MASK 0xff000000 /* Size of field unknown */ 114 #define TR_100_PIO_ADDRSETUP_SHIFT 24 115 #define TR_100_MDMA_MASK 0x00fff000 116 #define TR_100_MDMA_RECOVERY_MASK 0x00fc0000 117 #define TR_100_MDMA_RECOVERY_SHIFT 18 118 #define TR_100_MDMA_ACCESS_MASK 0x0003f000 119 #define TR_100_MDMA_ACCESS_SHIFT 12 120 #define TR_100_PIO_MASK 0xff000fff 121 #define TR_100_PIO_RECOVERY_MASK 0x00000fc0 122 #define TR_100_PIO_RECOVERY_SHIFT 6 123 #define TR_100_PIO_ACCESS_MASK 0x0000003f 124 #define TR_100_PIO_ACCESS_SHIFT 0 125 126 #define TR_100_UDMAREG_UDMA_MASK 0x0000ffff 127 #define TR_100_UDMAREG_UDMA_EN 0x00000001 128 129 130 /* 66Mhz cell, found in KeyLargo. Can do ultra mode 0 to 2 on 131 * 40 connector cable and to 4 on 80 connector one. 132 * Clock unit is 15ns (66Mhz) 133 * 134 * 3 Values can be programmed: 135 * - Write data setup, which appears to match the cycle time. They 136 * also call it DIOW setup. 137 * - Ready to pause time (from spec) 138 * - Address setup. That one is weird. I don't see where exactly 139 * it fits in UDMA cycles, I got it's name from an obscure piece 140 * of commented out code in Darwin. They leave it to 0, we do as 141 * well, despite a comment that would lead to think it has a 142 * min value of 45ns. 143 * Apple also add 60ns to the write data setup (or cycle time ?) on 144 * reads. 145 */ 146 #define TR_66_UDMA_MASK 0xfff00000 147 #define TR_66_UDMA_EN 0x00100000 /* Enable Ultra mode for DMA */ 148 #define TR_66_PIO_ADDRSETUP_MASK 0xe0000000 /* Address setup */ 149 #define TR_66_PIO_ADDRSETUP_SHIFT 29 150 #define TR_66_UDMA_RDY2PAUS_MASK 0x1e000000 /* Ready 2 pause time */ 151 #define TR_66_UDMA_RDY2PAUS_SHIFT 25 152 #define TR_66_UDMA_WRDATASETUP_MASK 0x01e00000 /* Write data setup time */ 153 #define TR_66_UDMA_WRDATASETUP_SHIFT 21 154 #define TR_66_MDMA_MASK 0x000ffc00 155 #define TR_66_MDMA_RECOVERY_MASK 0x000f8000 156 #define TR_66_MDMA_RECOVERY_SHIFT 15 157 #define TR_66_MDMA_ACCESS_MASK 0x00007c00 158 #define TR_66_MDMA_ACCESS_SHIFT 10 159 #define TR_66_PIO_MASK 0xe00003ff 160 #define TR_66_PIO_RECOVERY_MASK 0x000003e0 161 #define TR_66_PIO_RECOVERY_SHIFT 5 162 #define TR_66_PIO_ACCESS_MASK 0x0000001f 163 #define TR_66_PIO_ACCESS_SHIFT 0 164 165 /* 33Mhz cell, found in OHare, Heathrow (& Paddington) and KeyLargo 166 * Can do pio & mdma modes, clock unit is 30ns (33Mhz) 167 * 168 * The access time and recovery time can be programmed. Some older 169 * Darwin code base limit OHare to 150ns cycle time. I decided to do 170 * the same here fore safety against broken old hardware ;) 171 * The HalfTick bit, when set, adds half a clock (15ns) to the access 172 * time and removes one from recovery. It's not supported on KeyLargo 173 * implementation afaik. The E bit appears to be set for PIO mode 0 and 174 * is used to reach long timings used in this mode. 175 */ 176 #define TR_33_MDMA_MASK 0x003ff800 177 #define TR_33_MDMA_RECOVERY_MASK 0x001f0000 178 #define TR_33_MDMA_RECOVERY_SHIFT 16 179 #define TR_33_MDMA_ACCESS_MASK 0x0000f800 180 #define TR_33_MDMA_ACCESS_SHIFT 11 181 #define TR_33_MDMA_HALFTICK 0x00200000 182 #define TR_33_PIO_MASK 0x000007ff 183 #define TR_33_PIO_E 0x00000400 184 #define TR_33_PIO_RECOVERY_MASK 0x000003e0 185 #define TR_33_PIO_RECOVERY_SHIFT 5 186 #define TR_33_PIO_ACCESS_MASK 0x0000001f 187 #define TR_33_PIO_ACCESS_SHIFT 0 188 189 /* 190 * Interrupt register definitions. Only present on newer cells 191 * (Keylargo and later afaik) so we don't use it. 192 */ 193 #define IDE_INTR_DMA 0x80000000 194 #define IDE_INTR_DEVICE 0x40000000 195 196 /* 197 * FCR Register on Kauai. Not sure what bit 0x4 is ... 198 */ 199 #define KAUAI_FCR_UATA_MAGIC 0x00000004 200 #define KAUAI_FCR_UATA_RESET_N 0x00000002 201 #define KAUAI_FCR_UATA_ENABLE 0x00000001 202 203 204 /* Allow up to 256 DBDMA commands per xfer */ 205 #define MAX_DCMDS 256 206 207 /* Don't let a DMA segment go all the way to 64K */ 208 #define MAX_DBDMA_SEG 0xff00 209 210 211 /* 212 * Wait 1s for disk to answer on IDE bus after a hard reset 213 * of the device (via GPIO/FCR). 214 * 215 * Some devices seem to "pollute" the bus even after dropping 216 * the BSY bit (typically some combo drives slave on the UDMA 217 * bus) after a hard reset. Since we hard reset all drives on 218 * KeyLargo ATA66, we have to keep that delay around. I may end 219 * up not hard resetting anymore on these and keep the delay only 220 * for older interfaces instead (we have to reset when coming 221 * from MacOS...) --BenH. 222 */ 223 #define IDE_WAKEUP_DELAY_MS 1000 224 225 struct pata_macio_timing; 226 227 struct pata_macio_priv { 228 int kind; 229 int aapl_bus_id; 230 int mediabay : 1; 231 struct device_node *node; 232 struct macio_dev *mdev; 233 struct pci_dev *pdev; 234 struct device *dev; 235 int irq; 236 u32 treg[2][2]; 237 void __iomem *tfregs; 238 void __iomem *kauai_fcr; 239 struct dbdma_cmd * dma_table_cpu; 240 dma_addr_t dma_table_dma; 241 struct ata_host *host; 242 const struct pata_macio_timing *timings; 243 }; 244 245 /* Previous variants of this driver used to calculate timings 246 * for various variants of the chip and use tables for others. 247 * 248 * Not only was this confusing, but in addition, it isn't clear 249 * whether our calculation code was correct. It didn't entirely 250 * match the darwin code and whatever documentation I could find 251 * on these cells 252 * 253 * I decided to entirely rely on a table instead for this version 254 * of the driver. Also, because I don't really care about derated 255 * modes and really old HW other than making it work, I'm not going 256 * to calculate / snoop timing values for something else than the 257 * standard modes. 258 */ 259 struct pata_macio_timing { 260 int mode; 261 u32 reg1; /* Bits to set in first timing reg */ 262 u32 reg2; /* Bits to set in second timing reg */ 263 }; 264 265 static const struct pata_macio_timing pata_macio_ohare_timings[] = { 266 { XFER_PIO_0, 0x00000526, 0, }, 267 { XFER_PIO_1, 0x00000085, 0, }, 268 { XFER_PIO_2, 0x00000025, 0, }, 269 { XFER_PIO_3, 0x00000025, 0, }, 270 { XFER_PIO_4, 0x00000025, 0, }, 271 { XFER_MW_DMA_0, 0x00074000, 0, }, 272 { XFER_MW_DMA_1, 0x00221000, 0, }, 273 { XFER_MW_DMA_2, 0x00211000, 0, }, 274 { -1, 0, 0 } 275 }; 276 277 static const struct pata_macio_timing pata_macio_heathrow_timings[] = { 278 { XFER_PIO_0, 0x00000526, 0, }, 279 { XFER_PIO_1, 0x00000085, 0, }, 280 { XFER_PIO_2, 0x00000025, 0, }, 281 { XFER_PIO_3, 0x00000025, 0, }, 282 { XFER_PIO_4, 0x00000025, 0, }, 283 { XFER_MW_DMA_0, 0x00074000, 0, }, 284 { XFER_MW_DMA_1, 0x00221000, 0, }, 285 { XFER_MW_DMA_2, 0x00211000, 0, }, 286 { -1, 0, 0 } 287 }; 288 289 static const struct pata_macio_timing pata_macio_kl33_timings[] = { 290 { XFER_PIO_0, 0x00000526, 0, }, 291 { XFER_PIO_1, 0x00000085, 0, }, 292 { XFER_PIO_2, 0x00000025, 0, }, 293 { XFER_PIO_3, 0x00000025, 0, }, 294 { XFER_PIO_4, 0x00000025, 0, }, 295 { XFER_MW_DMA_0, 0x00084000, 0, }, 296 { XFER_MW_DMA_1, 0x00021800, 0, }, 297 { XFER_MW_DMA_2, 0x00011800, 0, }, 298 { -1, 0, 0 } 299 }; 300 301 static const struct pata_macio_timing pata_macio_kl66_timings[] = { 302 { XFER_PIO_0, 0x0000038c, 0, }, 303 { XFER_PIO_1, 0x0000020a, 0, }, 304 { XFER_PIO_2, 0x00000127, 0, }, 305 { XFER_PIO_3, 0x000000c6, 0, }, 306 { XFER_PIO_4, 0x00000065, 0, }, 307 { XFER_MW_DMA_0, 0x00084000, 0, }, 308 { XFER_MW_DMA_1, 0x00029800, 0, }, 309 { XFER_MW_DMA_2, 0x00019400, 0, }, 310 { XFER_UDMA_0, 0x19100000, 0, }, 311 { XFER_UDMA_1, 0x14d00000, 0, }, 312 { XFER_UDMA_2, 0x10900000, 0, }, 313 { XFER_UDMA_3, 0x0c700000, 0, }, 314 { XFER_UDMA_4, 0x0c500000, 0, }, 315 { -1, 0, 0 } 316 }; 317 318 static const struct pata_macio_timing pata_macio_kauai_timings[] = { 319 { XFER_PIO_0, 0x08000a92, 0, }, 320 { XFER_PIO_1, 0x0800060f, 0, }, 321 { XFER_PIO_2, 0x0800038b, 0, }, 322 { XFER_PIO_3, 0x05000249, 0, }, 323 { XFER_PIO_4, 0x04000148, 0, }, 324 { XFER_MW_DMA_0, 0x00618000, 0, }, 325 { XFER_MW_DMA_1, 0x00209000, 0, }, 326 { XFER_MW_DMA_2, 0x00148000, 0, }, 327 { XFER_UDMA_0, 0, 0x000070c1, }, 328 { XFER_UDMA_1, 0, 0x00005d81, }, 329 { XFER_UDMA_2, 0, 0x00004a61, }, 330 { XFER_UDMA_3, 0, 0x00003a51, }, 331 { XFER_UDMA_4, 0, 0x00002a31, }, 332 { XFER_UDMA_5, 0, 0x00002921, }, 333 { -1, 0, 0 } 334 }; 335 336 static const struct pata_macio_timing pata_macio_shasta_timings[] = { 337 { XFER_PIO_0, 0x0a000c97, 0, }, 338 { XFER_PIO_1, 0x07000712, 0, }, 339 { XFER_PIO_2, 0x040003cd, 0, }, 340 { XFER_PIO_3, 0x0500028b, 0, }, 341 { XFER_PIO_4, 0x0400010a, 0, }, 342 { XFER_MW_DMA_0, 0x00820800, 0, }, 343 { XFER_MW_DMA_1, 0x0028b000, 0, }, 344 { XFER_MW_DMA_2, 0x001ca000, 0, }, 345 { XFER_UDMA_0, 0, 0x00035901, }, 346 { XFER_UDMA_1, 0, 0x000348b1, }, 347 { XFER_UDMA_2, 0, 0x00033881, }, 348 { XFER_UDMA_3, 0, 0x00033861, }, 349 { XFER_UDMA_4, 0, 0x00033841, }, 350 { XFER_UDMA_5, 0, 0x00033031, }, 351 { XFER_UDMA_6, 0, 0x00033021, }, 352 { -1, 0, 0 } 353 }; 354 355 static const struct pata_macio_timing *pata_macio_find_timing( 356 struct pata_macio_priv *priv, 357 int mode) 358 { 359 int i; 360 361 for (i = 0; priv->timings[i].mode > 0; i++) { 362 if (priv->timings[i].mode == mode) 363 return &priv->timings[i]; 364 } 365 return NULL; 366 } 367 368 369 static void pata_macio_apply_timings(struct ata_port *ap, unsigned int device) 370 { 371 struct pata_macio_priv *priv = ap->private_data; 372 void __iomem *rbase = ap->ioaddr.cmd_addr; 373 374 if (priv->kind == controller_sh_ata6 || 375 priv->kind == controller_un_ata6 || 376 priv->kind == controller_k2_ata6) { 377 writel(priv->treg[device][0], rbase + IDE_KAUAI_PIO_CONFIG); 378 writel(priv->treg[device][1], rbase + IDE_KAUAI_ULTRA_CONFIG); 379 } else 380 writel(priv->treg[device][0], rbase + IDE_TIMING_CONFIG); 381 } 382 383 static void pata_macio_dev_select(struct ata_port *ap, unsigned int device) 384 { 385 ata_sff_dev_select(ap, device); 386 387 /* Apply timings */ 388 pata_macio_apply_timings(ap, device); 389 } 390 391 static void pata_macio_set_timings(struct ata_port *ap, 392 struct ata_device *adev) 393 { 394 struct pata_macio_priv *priv = ap->private_data; 395 const struct pata_macio_timing *t; 396 397 dev_dbg(priv->dev, "Set timings: DEV=%d,PIO=0x%x (%s),DMA=0x%x (%s)\n", 398 adev->devno, 399 adev->pio_mode, 400 ata_mode_string(ata_xfer_mode2mask(adev->pio_mode)), 401 adev->dma_mode, 402 ata_mode_string(ata_xfer_mode2mask(adev->dma_mode))); 403 404 /* First clear timings */ 405 priv->treg[adev->devno][0] = priv->treg[adev->devno][1] = 0; 406 407 /* Now get the PIO timings */ 408 t = pata_macio_find_timing(priv, adev->pio_mode); 409 if (t == NULL) { 410 dev_warn(priv->dev, "Invalid PIO timing requested: 0x%x\n", 411 adev->pio_mode); 412 t = pata_macio_find_timing(priv, XFER_PIO_0); 413 } 414 BUG_ON(t == NULL); 415 416 /* PIO timings only ever use the first treg */ 417 priv->treg[adev->devno][0] |= t->reg1; 418 419 /* Now get DMA timings */ 420 t = pata_macio_find_timing(priv, adev->dma_mode); 421 if (t == NULL || (t->reg1 == 0 && t->reg2 == 0)) { 422 dev_dbg(priv->dev, "DMA timing not set yet, using MW_DMA_0\n"); 423 t = pata_macio_find_timing(priv, XFER_MW_DMA_0); 424 } 425 BUG_ON(t == NULL); 426 427 /* DMA timings can use both tregs */ 428 priv->treg[adev->devno][0] |= t->reg1; 429 priv->treg[adev->devno][1] |= t->reg2; 430 431 dev_dbg(priv->dev, " -> %08x %08x\n", 432 priv->treg[adev->devno][0], 433 priv->treg[adev->devno][1]); 434 435 /* Apply to hardware */ 436 pata_macio_apply_timings(ap, adev->devno); 437 } 438 439 /* 440 * Blast some well known "safe" values to the timing registers at init or 441 * wakeup from sleep time, before we do real calculation 442 */ 443 static void pata_macio_default_timings(struct pata_macio_priv *priv) 444 { 445 unsigned int value, value2 = 0; 446 447 switch(priv->kind) { 448 case controller_sh_ata6: 449 value = 0x0a820c97; 450 value2 = 0x00033031; 451 break; 452 case controller_un_ata6: 453 case controller_k2_ata6: 454 value = 0x08618a92; 455 value2 = 0x00002921; 456 break; 457 case controller_kl_ata4: 458 value = 0x0008438c; 459 break; 460 case controller_kl_ata3: 461 value = 0x00084526; 462 break; 463 case controller_heathrow: 464 case controller_ohare: 465 default: 466 value = 0x00074526; 467 break; 468 } 469 priv->treg[0][0] = priv->treg[1][0] = value; 470 priv->treg[0][1] = priv->treg[1][1] = value2; 471 } 472 473 static int pata_macio_cable_detect(struct ata_port *ap) 474 { 475 struct pata_macio_priv *priv = ap->private_data; 476 477 /* Get cable type from device-tree */ 478 if (priv->kind == controller_kl_ata4 || 479 priv->kind == controller_un_ata6 || 480 priv->kind == controller_k2_ata6 || 481 priv->kind == controller_sh_ata6) { 482 const char* cable = of_get_property(priv->node, "cable-type", 483 NULL); 484 struct device_node *root = of_find_node_by_path("/"); 485 const char *model = of_get_property(root, "model", NULL); 486 487 of_node_put(root); 488 489 if (cable && !strncmp(cable, "80-", 3)) { 490 /* Some drives fail to detect 80c cable in PowerBook 491 * These machine use proprietary short IDE cable 492 * anyway 493 */ 494 if (!strncmp(model, "PowerBook", 9)) 495 return ATA_CBL_PATA40_SHORT; 496 else 497 return ATA_CBL_PATA80; 498 } 499 } 500 501 /* G5's seem to have incorrect cable type in device-tree. 502 * Let's assume they always have a 80 conductor cable, this seem to 503 * be always the case unless the user mucked around 504 */ 505 if (of_device_is_compatible(priv->node, "K2-UATA") || 506 of_device_is_compatible(priv->node, "shasta-ata")) 507 return ATA_CBL_PATA80; 508 509 /* Anything else is 40 connectors */ 510 return ATA_CBL_PATA40; 511 } 512 513 static enum ata_completion_errors pata_macio_qc_prep(struct ata_queued_cmd *qc) 514 { 515 unsigned int write = (qc->tf.flags & ATA_TFLAG_WRITE); 516 struct ata_port *ap = qc->ap; 517 struct pata_macio_priv *priv = ap->private_data; 518 struct scatterlist *sg; 519 struct dbdma_cmd *table; 520 unsigned int si, pi; 521 522 dev_dbgdma(priv->dev, "%s: qc %p flags %lx, write %d dev %d\n", 523 __func__, qc, qc->flags, write, qc->dev->devno); 524 525 if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 526 return AC_ERR_OK; 527 528 table = (struct dbdma_cmd *) priv->dma_table_cpu; 529 530 pi = 0; 531 for_each_sg(qc->sg, sg, qc->n_elem, si) { 532 u32 addr, sg_len, len; 533 534 /* determine if physical DMA addr spans 64K boundary. 535 * Note h/w doesn't support 64-bit, so we unconditionally 536 * truncate dma_addr_t to u32. 537 */ 538 addr = (u32) sg_dma_address(sg); 539 sg_len = sg_dma_len(sg); 540 541 while (sg_len) { 542 /* table overflow should never happen */ 543 BUG_ON (pi++ >= MAX_DCMDS); 544 545 len = (sg_len < MAX_DBDMA_SEG) ? sg_len : MAX_DBDMA_SEG; 546 table->command = cpu_to_le16(write ? OUTPUT_MORE: INPUT_MORE); 547 table->req_count = cpu_to_le16(len); 548 table->phy_addr = cpu_to_le32(addr); 549 table->cmd_dep = 0; 550 table->xfer_status = 0; 551 table->res_count = 0; 552 addr += len; 553 sg_len -= len; 554 ++table; 555 } 556 } 557 558 /* Should never happen according to Tejun */ 559 BUG_ON(!pi); 560 561 /* Convert the last command to an input/output */ 562 table--; 563 table->command = cpu_to_le16(write ? OUTPUT_LAST: INPUT_LAST); 564 table++; 565 566 /* Add the stop command to the end of the list */ 567 memset(table, 0, sizeof(struct dbdma_cmd)); 568 table->command = cpu_to_le16(DBDMA_STOP); 569 570 dev_dbgdma(priv->dev, "%s: %d DMA list entries\n", __func__, pi); 571 572 return AC_ERR_OK; 573 } 574 575 576 static void pata_macio_freeze(struct ata_port *ap) 577 { 578 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; 579 580 if (dma_regs) { 581 unsigned int timeout = 1000000; 582 583 /* Make sure DMA controller is stopped */ 584 writel((RUN|PAUSE|FLUSH|WAKE|DEAD) << 16, &dma_regs->control); 585 while (--timeout && (readl(&dma_regs->status) & RUN)) 586 udelay(1); 587 } 588 589 ata_sff_freeze(ap); 590 } 591 592 593 static void pata_macio_bmdma_setup(struct ata_queued_cmd *qc) 594 { 595 struct ata_port *ap = qc->ap; 596 struct pata_macio_priv *priv = ap->private_data; 597 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; 598 int dev = qc->dev->devno; 599 600 dev_dbgdma(priv->dev, "%s: qc %p\n", __func__, qc); 601 602 /* Make sure DMA commands updates are visible */ 603 writel(priv->dma_table_dma, &dma_regs->cmdptr); 604 605 /* On KeyLargo 66Mhz cell, we need to add 60ns to wrDataSetup on 606 * UDMA reads 607 */ 608 if (priv->kind == controller_kl_ata4 && 609 (priv->treg[dev][0] & TR_66_UDMA_EN)) { 610 void __iomem *rbase = ap->ioaddr.cmd_addr; 611 u32 reg = priv->treg[dev][0]; 612 613 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) 614 reg += 0x00800000; 615 writel(reg, rbase + IDE_TIMING_CONFIG); 616 } 617 618 /* issue r/w command */ 619 ap->ops->sff_exec_command(ap, &qc->tf); 620 } 621 622 static void pata_macio_bmdma_start(struct ata_queued_cmd *qc) 623 { 624 struct ata_port *ap = qc->ap; 625 struct pata_macio_priv *priv = ap->private_data; 626 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; 627 628 dev_dbgdma(priv->dev, "%s: qc %p\n", __func__, qc); 629 630 writel((RUN << 16) | RUN, &dma_regs->control); 631 /* Make sure it gets to the controller right now */ 632 (void)readl(&dma_regs->control); 633 } 634 635 static void pata_macio_bmdma_stop(struct ata_queued_cmd *qc) 636 { 637 struct ata_port *ap = qc->ap; 638 struct pata_macio_priv *priv = ap->private_data; 639 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; 640 unsigned int timeout = 1000000; 641 642 dev_dbgdma(priv->dev, "%s: qc %p\n", __func__, qc); 643 644 /* Stop the DMA engine and wait for it to full halt */ 645 writel (((RUN|WAKE|DEAD) << 16), &dma_regs->control); 646 while (--timeout && (readl(&dma_regs->status) & RUN)) 647 udelay(1); 648 } 649 650 static u8 pata_macio_bmdma_status(struct ata_port *ap) 651 { 652 struct pata_macio_priv *priv = ap->private_data; 653 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; 654 u32 dstat, rstat = ATA_DMA_INTR; 655 unsigned long timeout = 0; 656 657 dstat = readl(&dma_regs->status); 658 659 dev_dbgdma(priv->dev, "%s: dstat=%x\n", __func__, dstat); 660 661 /* We have two things to deal with here: 662 * 663 * - The dbdma won't stop if the command was started 664 * but completed with an error without transferring all 665 * datas. This happens when bad blocks are met during 666 * a multi-block transfer. 667 * 668 * - The dbdma fifo hasn't yet finished flushing to 669 * system memory when the disk interrupt occurs. 670 */ 671 672 /* First check for errors */ 673 if ((dstat & (RUN|DEAD)) != RUN) 674 rstat |= ATA_DMA_ERR; 675 676 /* If ACTIVE is cleared, the STOP command has been hit and 677 * the transfer is complete. If not, we have to flush the 678 * channel. 679 */ 680 if ((dstat & ACTIVE) == 0) 681 return rstat; 682 683 dev_dbgdma(priv->dev, "%s: DMA still active, flushing...\n", __func__); 684 685 /* If dbdma didn't execute the STOP command yet, the 686 * active bit is still set. We consider that we aren't 687 * sharing interrupts (which is hopefully the case with 688 * those controllers) and so we just try to flush the 689 * channel for pending data in the fifo 690 */ 691 udelay(1); 692 writel((FLUSH << 16) | FLUSH, &dma_regs->control); 693 for (;;) { 694 udelay(1); 695 dstat = readl(&dma_regs->status); 696 if ((dstat & FLUSH) == 0) 697 break; 698 if (++timeout > 1000) { 699 dev_warn(priv->dev, "timeout flushing DMA\n"); 700 rstat |= ATA_DMA_ERR; 701 break; 702 } 703 } 704 return rstat; 705 } 706 707 /* port_start is when we allocate the DMA command list */ 708 static int pata_macio_port_start(struct ata_port *ap) 709 { 710 struct pata_macio_priv *priv = ap->private_data; 711 712 if (ap->ioaddr.bmdma_addr == NULL) 713 return 0; 714 715 /* Allocate space for the DBDMA commands. 716 * 717 * The +2 is +1 for the stop command and +1 to allow for 718 * aligning the start address to a multiple of 16 bytes. 719 */ 720 priv->dma_table_cpu = 721 dmam_alloc_coherent(priv->dev, 722 (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd), 723 &priv->dma_table_dma, GFP_KERNEL); 724 if (priv->dma_table_cpu == NULL) { 725 dev_err(priv->dev, "Unable to allocate DMA command list\n"); 726 ap->ioaddr.bmdma_addr = NULL; 727 ap->mwdma_mask = 0; 728 ap->udma_mask = 0; 729 } 730 return 0; 731 } 732 733 static void pata_macio_irq_clear(struct ata_port *ap) 734 { 735 struct pata_macio_priv *priv = ap->private_data; 736 737 /* Nothing to do here */ 738 739 dev_dbgdma(priv->dev, "%s\n", __func__); 740 } 741 742 static void pata_macio_reset_hw(struct pata_macio_priv *priv, int resume) 743 { 744 dev_dbg(priv->dev, "Enabling & resetting... \n"); 745 746 if (priv->mediabay) 747 return; 748 749 if (priv->kind == controller_ohare && !resume) { 750 /* The code below is having trouble on some ohare machines 751 * (timing related ?). Until I can put my hand on one of these 752 * units, I keep the old way 753 */ 754 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, priv->node, 0, 1); 755 } else { 756 int rc; 757 758 /* Reset and enable controller */ 759 rc = ppc_md.feature_call(PMAC_FTR_IDE_RESET, 760 priv->node, priv->aapl_bus_id, 1); 761 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, 762 priv->node, priv->aapl_bus_id, 1); 763 msleep(10); 764 /* Only bother waiting if there's a reset control */ 765 if (rc == 0) { 766 ppc_md.feature_call(PMAC_FTR_IDE_RESET, 767 priv->node, priv->aapl_bus_id, 0); 768 msleep(IDE_WAKEUP_DELAY_MS); 769 } 770 } 771 772 /* If resuming a PCI device, restore the config space here */ 773 if (priv->pdev && resume) { 774 int rc; 775 776 pci_restore_state(priv->pdev); 777 rc = pcim_enable_device(priv->pdev); 778 if (rc) 779 dev_err(&priv->pdev->dev, 780 "Failed to enable device after resume (%d)\n", 781 rc); 782 else 783 pci_set_master(priv->pdev); 784 } 785 786 /* On Kauai, initialize the FCR. We don't perform a reset, doesn't really 787 * seem necessary and speeds up the boot process 788 */ 789 if (priv->kauai_fcr) 790 writel(KAUAI_FCR_UATA_MAGIC | 791 KAUAI_FCR_UATA_RESET_N | 792 KAUAI_FCR_UATA_ENABLE, priv->kauai_fcr); 793 } 794 795 /* Hook the standard slave config to fixup some HW related alignment 796 * restrictions 797 */ 798 static int pata_macio_slave_config(struct scsi_device *sdev) 799 { 800 struct ata_port *ap = ata_shost_to_port(sdev->host); 801 struct pata_macio_priv *priv = ap->private_data; 802 struct ata_device *dev; 803 u16 cmd; 804 int rc; 805 806 /* First call original */ 807 rc = ata_scsi_slave_config(sdev); 808 if (rc) 809 return rc; 810 811 /* This is lifted from sata_nv */ 812 dev = &ap->link.device[sdev->id]; 813 814 /* OHare has issues with non cache aligned DMA on some chipsets */ 815 if (priv->kind == controller_ohare) { 816 blk_queue_update_dma_alignment(sdev->request_queue, 31); 817 blk_queue_update_dma_pad(sdev->request_queue, 31); 818 819 /* Tell the world about it */ 820 ata_dev_info(dev, "OHare alignment limits applied\n"); 821 return 0; 822 } 823 824 /* We only have issues with ATAPI */ 825 if (dev->class != ATA_DEV_ATAPI) 826 return 0; 827 828 /* Shasta and K2 seem to have "issues" with reads ... */ 829 if (priv->kind == controller_sh_ata6 || priv->kind == controller_k2_ata6) { 830 /* Allright these are bad, apply restrictions */ 831 blk_queue_update_dma_alignment(sdev->request_queue, 15); 832 blk_queue_update_dma_pad(sdev->request_queue, 15); 833 834 /* We enable MWI and hack cache line size directly here, this 835 * is specific to this chipset and not normal values, we happen 836 * to somewhat know what we are doing here (which is basically 837 * to do the same Apple does and pray they did not get it wrong :-) 838 */ 839 BUG_ON(!priv->pdev); 840 pci_write_config_byte(priv->pdev, PCI_CACHE_LINE_SIZE, 0x08); 841 pci_read_config_word(priv->pdev, PCI_COMMAND, &cmd); 842 pci_write_config_word(priv->pdev, PCI_COMMAND, 843 cmd | PCI_COMMAND_INVALIDATE); 844 845 /* Tell the world about it */ 846 ata_dev_info(dev, "K2/Shasta alignment limits applied\n"); 847 } 848 849 return 0; 850 } 851 852 #ifdef CONFIG_PM_SLEEP 853 static int pata_macio_do_suspend(struct pata_macio_priv *priv, pm_message_t mesg) 854 { 855 /* First, core libata suspend to do most of the work */ 856 ata_host_suspend(priv->host, mesg); 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 /* Not sure what the real max is but we know it's less than 64K, let's 917 * use 64K minus 256 918 */ 919 .max_segment_size = MAX_DBDMA_SEG, 920 .slave_configure = pata_macio_slave_config, 921 .sdev_groups = ata_common_sdev_groups, 922 .can_queue = ATA_DEF_QUEUE, 923 .tag_alloc_policy = BLK_TAG_ALLOC_RR, 924 }; 925 926 static struct ata_port_operations pata_macio_ops = { 927 .inherits = &ata_bmdma_port_ops, 928 929 .freeze = pata_macio_freeze, 930 .set_piomode = pata_macio_set_timings, 931 .set_dmamode = pata_macio_set_timings, 932 .cable_detect = pata_macio_cable_detect, 933 .sff_dev_select = pata_macio_dev_select, 934 .qc_prep = pata_macio_qc_prep, 935 .bmdma_setup = pata_macio_bmdma_setup, 936 .bmdma_start = pata_macio_bmdma_start, 937 .bmdma_stop = pata_macio_bmdma_stop, 938 .bmdma_status = pata_macio_bmdma_status, 939 .port_start = pata_macio_port_start, 940 .sff_irq_clear = pata_macio_irq_clear, 941 }; 942 943 static void pata_macio_invariants(struct pata_macio_priv *priv) 944 { 945 const int *bidp; 946 947 /* Identify the type of controller */ 948 if (of_device_is_compatible(priv->node, "shasta-ata")) { 949 priv->kind = controller_sh_ata6; 950 priv->timings = pata_macio_shasta_timings; 951 } else if (of_device_is_compatible(priv->node, "kauai-ata")) { 952 priv->kind = controller_un_ata6; 953 priv->timings = pata_macio_kauai_timings; 954 } else if (of_device_is_compatible(priv->node, "K2-UATA")) { 955 priv->kind = controller_k2_ata6; 956 priv->timings = pata_macio_kauai_timings; 957 } else if (of_device_is_compatible(priv->node, "keylargo-ata")) { 958 if (of_node_name_eq(priv->node, "ata-4")) { 959 priv->kind = controller_kl_ata4; 960 priv->timings = pata_macio_kl66_timings; 961 } else { 962 priv->kind = controller_kl_ata3; 963 priv->timings = pata_macio_kl33_timings; 964 } 965 } else if (of_device_is_compatible(priv->node, "heathrow-ata")) { 966 priv->kind = controller_heathrow; 967 priv->timings = pata_macio_heathrow_timings; 968 } else { 969 priv->kind = controller_ohare; 970 priv->timings = pata_macio_ohare_timings; 971 } 972 973 /* XXX FIXME --- setup priv->mediabay here */ 974 975 /* Get Apple bus ID (for clock and ASIC control) */ 976 bidp = of_get_property(priv->node, "AAPL,bus-id", NULL); 977 priv->aapl_bus_id = bidp ? *bidp : 0; 978 979 /* Fixup missing Apple bus ID in case of media-bay */ 980 if (priv->mediabay && !bidp) 981 priv->aapl_bus_id = 1; 982 } 983 984 static void pata_macio_setup_ios(struct ata_ioports *ioaddr, 985 void __iomem * base, void __iomem * dma) 986 { 987 /* cmd_addr is the base of regs for that port */ 988 ioaddr->cmd_addr = base; 989 990 /* taskfile registers */ 991 ioaddr->data_addr = base + (ATA_REG_DATA << 4); 992 ioaddr->error_addr = base + (ATA_REG_ERR << 4); 993 ioaddr->feature_addr = base + (ATA_REG_FEATURE << 4); 994 ioaddr->nsect_addr = base + (ATA_REG_NSECT << 4); 995 ioaddr->lbal_addr = base + (ATA_REG_LBAL << 4); 996 ioaddr->lbam_addr = base + (ATA_REG_LBAM << 4); 997 ioaddr->lbah_addr = base + (ATA_REG_LBAH << 4); 998 ioaddr->device_addr = base + (ATA_REG_DEVICE << 4); 999 ioaddr->status_addr = base + (ATA_REG_STATUS << 4); 1000 ioaddr->command_addr = base + (ATA_REG_CMD << 4); 1001 ioaddr->altstatus_addr = base + 0x160; 1002 ioaddr->ctl_addr = base + 0x160; 1003 ioaddr->bmdma_addr = dma; 1004 } 1005 1006 static void pmac_macio_calc_timing_masks(struct pata_macio_priv *priv, 1007 struct ata_port_info *pinfo) 1008 { 1009 int i = 0; 1010 1011 pinfo->pio_mask = 0; 1012 pinfo->mwdma_mask = 0; 1013 pinfo->udma_mask = 0; 1014 1015 while (priv->timings[i].mode > 0) { 1016 unsigned int mask = 1U << (priv->timings[i].mode & 0x0f); 1017 switch(priv->timings[i].mode & 0xf0) { 1018 case 0x00: /* PIO */ 1019 pinfo->pio_mask |= (mask >> 8); 1020 break; 1021 case 0x20: /* MWDMA */ 1022 pinfo->mwdma_mask |= mask; 1023 break; 1024 case 0x40: /* UDMA */ 1025 pinfo->udma_mask |= mask; 1026 break; 1027 } 1028 i++; 1029 } 1030 dev_dbg(priv->dev, "Supported masks: PIO=%x, MWDMA=%x, UDMA=%x\n", 1031 pinfo->pio_mask, pinfo->mwdma_mask, pinfo->udma_mask); 1032 } 1033 1034 static int pata_macio_common_init(struct pata_macio_priv *priv, 1035 resource_size_t tfregs, 1036 resource_size_t dmaregs, 1037 resource_size_t fcregs, 1038 unsigned long irq) 1039 { 1040 struct ata_port_info pinfo; 1041 const struct ata_port_info *ppi[] = { &pinfo, NULL }; 1042 void __iomem *dma_regs = NULL; 1043 1044 /* Fill up privates with various invariants collected from the 1045 * device-tree 1046 */ 1047 pata_macio_invariants(priv); 1048 1049 /* Make sure we have sane initial timings in the cache */ 1050 pata_macio_default_timings(priv); 1051 1052 /* Allocate libata host for 1 port */ 1053 memset(&pinfo, 0, sizeof(struct ata_port_info)); 1054 pmac_macio_calc_timing_masks(priv, &pinfo); 1055 pinfo.flags = ATA_FLAG_SLAVE_POSS; 1056 pinfo.port_ops = &pata_macio_ops; 1057 pinfo.private_data = priv; 1058 1059 priv->host = ata_host_alloc_pinfo(priv->dev, ppi, 1); 1060 if (priv->host == NULL) { 1061 dev_err(priv->dev, "Failed to allocate ATA port structure\n"); 1062 return -ENOMEM; 1063 } 1064 1065 /* Setup the private data in host too */ 1066 priv->host->private_data = priv; 1067 1068 /* Map base registers */ 1069 priv->tfregs = devm_ioremap(priv->dev, tfregs, 0x100); 1070 if (priv->tfregs == NULL) { 1071 dev_err(priv->dev, "Failed to map ATA ports\n"); 1072 return -ENOMEM; 1073 } 1074 priv->host->iomap = &priv->tfregs; 1075 1076 /* Map DMA regs */ 1077 if (dmaregs != 0) { 1078 dma_regs = devm_ioremap(priv->dev, dmaregs, 1079 sizeof(struct dbdma_regs)); 1080 if (dma_regs == NULL) 1081 dev_warn(priv->dev, "Failed to map ATA DMA registers\n"); 1082 } 1083 1084 /* If chip has local feature control, map those regs too */ 1085 if (fcregs != 0) { 1086 priv->kauai_fcr = devm_ioremap(priv->dev, fcregs, 4); 1087 if (priv->kauai_fcr == NULL) { 1088 dev_err(priv->dev, "Failed to map ATA FCR register\n"); 1089 return -ENOMEM; 1090 } 1091 } 1092 1093 /* Setup port data structure */ 1094 pata_macio_setup_ios(&priv->host->ports[0]->ioaddr, 1095 priv->tfregs, dma_regs); 1096 priv->host->ports[0]->private_data = priv; 1097 1098 /* hard-reset the controller */ 1099 pata_macio_reset_hw(priv, 0); 1100 pata_macio_apply_timings(priv->host->ports[0], 0); 1101 1102 /* Enable bus master if necessary */ 1103 if (priv->pdev && dma_regs) 1104 pci_set_master(priv->pdev); 1105 1106 dev_info(priv->dev, "Activating pata-macio chipset %s, Apple bus ID %d\n", 1107 macio_ata_names[priv->kind], priv->aapl_bus_id); 1108 1109 /* Start it up */ 1110 priv->irq = irq; 1111 return ata_host_activate(priv->host, irq, ata_bmdma_interrupt, 0, 1112 &pata_macio_sht); 1113 } 1114 1115 static int pata_macio_attach(struct macio_dev *mdev, 1116 const struct of_device_id *match) 1117 { 1118 struct pata_macio_priv *priv; 1119 resource_size_t tfregs, dmaregs = 0; 1120 unsigned long irq; 1121 int rc; 1122 1123 /* Check for broken device-trees */ 1124 if (macio_resource_count(mdev) == 0) { 1125 dev_err(&mdev->ofdev.dev, 1126 "No addresses for controller\n"); 1127 return -ENXIO; 1128 } 1129 1130 /* Enable managed resources */ 1131 macio_enable_devres(mdev); 1132 1133 /* Allocate and init private data structure */ 1134 priv = devm_kzalloc(&mdev->ofdev.dev, 1135 sizeof(struct pata_macio_priv), GFP_KERNEL); 1136 if (!priv) 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) 1281 return -ENOMEM; 1282 1283 priv->node = of_node_get(np); 1284 priv->pdev = pdev; 1285 priv->dev = &pdev->dev; 1286 1287 /* Get MMIO regions */ 1288 if (pci_request_regions(pdev, "pata-macio")) { 1289 dev_err(&pdev->dev, 1290 "Cannot obtain PCI resources\n"); 1291 return -EBUSY; 1292 } 1293 1294 /* Get register addresses and call common initialization */ 1295 rbase = pci_resource_start(pdev, 0); 1296 if (pata_macio_common_init(priv, 1297 rbase + 0x2000, /* Taskfile regs */ 1298 rbase + 0x1000, /* DBDMA regs */ 1299 rbase, /* Feature control */ 1300 pdev->irq)) 1301 return -ENXIO; 1302 1303 return 0; 1304 } 1305 1306 static void pata_macio_pci_detach(struct pci_dev *pdev) 1307 { 1308 struct ata_host *host = pci_get_drvdata(pdev); 1309 1310 ata_host_detach(host); 1311 } 1312 1313 #ifdef CONFIG_PM_SLEEP 1314 static int pata_macio_pci_suspend(struct pci_dev *pdev, pm_message_t mesg) 1315 { 1316 struct ata_host *host = pci_get_drvdata(pdev); 1317 1318 return pata_macio_do_suspend(host->private_data, mesg); 1319 } 1320 1321 static int pata_macio_pci_resume(struct pci_dev *pdev) 1322 { 1323 struct ata_host *host = pci_get_drvdata(pdev); 1324 1325 return pata_macio_do_resume(host->private_data); 1326 } 1327 #endif /* CONFIG_PM_SLEEP */ 1328 1329 static const struct of_device_id pata_macio_match[] = 1330 { 1331 { .name = "IDE", }, 1332 { .name = "ATA", }, 1333 { .type = "ide", }, 1334 { .type = "ata", }, 1335 { /* sentinel */ } 1336 }; 1337 MODULE_DEVICE_TABLE(of, pata_macio_match); 1338 1339 static struct macio_driver pata_macio_driver = 1340 { 1341 .driver = { 1342 .name = "pata-macio", 1343 .owner = THIS_MODULE, 1344 .of_match_table = pata_macio_match, 1345 }, 1346 .probe = pata_macio_attach, 1347 .remove = pata_macio_detach, 1348 #ifdef CONFIG_PM_SLEEP 1349 .suspend = pata_macio_suspend, 1350 .resume = pata_macio_resume, 1351 #endif 1352 #ifdef CONFIG_PMAC_MEDIABAY 1353 .mediabay_event = pata_macio_mb_event, 1354 #endif 1355 }; 1356 1357 static const struct pci_device_id pata_macio_pci_match[] = { 1358 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_UNI_N_ATA), 0 }, 1359 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100), 0 }, 1360 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100), 0 }, 1361 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_SH_ATA), 0 }, 1362 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID2_ATA), 0 }, 1363 {}, 1364 }; 1365 1366 static struct pci_driver pata_macio_pci_driver = { 1367 .name = "pata-pci-macio", 1368 .id_table = pata_macio_pci_match, 1369 .probe = pata_macio_pci_attach, 1370 .remove = pata_macio_pci_detach, 1371 #ifdef CONFIG_PM_SLEEP 1372 .suspend = pata_macio_pci_suspend, 1373 .resume = pata_macio_pci_resume, 1374 #endif 1375 .driver = { 1376 .owner = THIS_MODULE, 1377 }, 1378 }; 1379 MODULE_DEVICE_TABLE(pci, pata_macio_pci_match); 1380 1381 1382 static int __init pata_macio_init(void) 1383 { 1384 int rc; 1385 1386 if (!machine_is(powermac)) 1387 return -ENODEV; 1388 1389 rc = pci_register_driver(&pata_macio_pci_driver); 1390 if (rc) 1391 return rc; 1392 rc = macio_register_driver(&pata_macio_driver); 1393 if (rc) { 1394 pci_unregister_driver(&pata_macio_pci_driver); 1395 return rc; 1396 } 1397 return 0; 1398 } 1399 1400 static void __exit pata_macio_exit(void) 1401 { 1402 macio_unregister_driver(&pata_macio_driver); 1403 pci_unregister_driver(&pata_macio_pci_driver); 1404 } 1405 1406 module_init(pata_macio_init); 1407 module_exit(pata_macio_exit); 1408 1409 MODULE_AUTHOR("Benjamin Herrenschmidt"); 1410 MODULE_DESCRIPTION("Apple MacIO PATA driver"); 1411 MODULE_LICENSE("GPL"); 1412 MODULE_VERSION(DRV_VERSION); 1413