tx4939ide.c revision 6762511934e6e7287ce3c8baac0d52ef64e3787b
1/* 2 * TX4939 internal IDE driver 3 * Based on RBTX49xx patch from CELF patch archive. 4 * 5 * This file is subject to the terms and conditions of the GNU General Public 6 * License. See the file "COPYING" in the main directory of this archive 7 * for more details. 8 * 9 * (C) Copyright TOSHIBA CORPORATION 2005-2007 10 */ 11 12#include <linux/module.h> 13#include <linux/types.h> 14#include <linux/ide.h> 15#include <linux/init.h> 16#include <linux/delay.h> 17#include <linux/platform_device.h> 18#include <linux/io.h> 19#include <linux/scatterlist.h> 20 21#include <asm/ide.h> 22 23#define MODNAME "tx4939ide" 24 25/* ATA Shadow Registers (8-bit except for Data which is 16-bit) */ 26#define TX4939IDE_Data 0x000 27#define TX4939IDE_Error_Feature 0x001 28#define TX4939IDE_Sec 0x002 29#define TX4939IDE_LBA0 0x003 30#define TX4939IDE_LBA1 0x004 31#define TX4939IDE_LBA2 0x005 32#define TX4939IDE_DevHead 0x006 33#define TX4939IDE_Stat_Cmd 0x007 34#define TX4939IDE_AltStat_DevCtl 0x402 35/* H/W DMA Registers */ 36#define TX4939IDE_DMA_Cmd 0x800 /* 8-bit */ 37#define TX4939IDE_DMA_Stat 0x802 /* 8-bit */ 38#define TX4939IDE_PRD_Ptr 0x804 /* 32-bit */ 39/* ATA100 CORE Registers (16-bit) */ 40#define TX4939IDE_Sys_Ctl 0xc00 41#define TX4939IDE_Xfer_Cnt_1 0xc08 42#define TX4939IDE_Xfer_Cnt_2 0xc0a 43#define TX4939IDE_Sec_Cnt 0xc10 44#define TX4939IDE_Start_Lo_Addr 0xc18 45#define TX4939IDE_Start_Up_Addr 0xc20 46#define TX4939IDE_Add_Ctl 0xc28 47#define TX4939IDE_Lo_Burst_Cnt 0xc30 48#define TX4939IDE_Up_Burst_Cnt 0xc38 49#define TX4939IDE_PIO_Addr 0xc88 50#define TX4939IDE_H_Rst_Tim 0xc90 51#define TX4939IDE_Int_Ctl 0xc98 52#define TX4939IDE_Pkt_Cmd 0xcb8 53#define TX4939IDE_Bxfer_Cnt_Hi 0xcc0 54#define TX4939IDE_Bxfer_Cnt_Lo 0xcc8 55#define TX4939IDE_Dev_TErr 0xcd0 56#define TX4939IDE_Pkt_Xfer_Ctl 0xcd8 57#define TX4939IDE_Start_TAddr 0xce0 58 59/* bits for Int_Ctl */ 60#define TX4939IDE_INT_ADDRERR 0x80 61#define TX4939IDE_INT_REACHMUL 0x40 62#define TX4939IDE_INT_DEVTIMING 0x20 63#define TX4939IDE_INT_UDMATERM 0x10 64#define TX4939IDE_INT_TIMER 0x08 65#define TX4939IDE_INT_BUSERR 0x04 66#define TX4939IDE_INT_XFEREND 0x02 67#define TX4939IDE_INT_HOST 0x01 68 69#define TX4939IDE_IGNORE_INTS \ 70 (TX4939IDE_INT_ADDRERR | TX4939IDE_INT_REACHMUL | \ 71 TX4939IDE_INT_DEVTIMING | TX4939IDE_INT_UDMATERM | \ 72 TX4939IDE_INT_TIMER | TX4939IDE_INT_XFEREND) 73 74#ifdef __BIG_ENDIAN 75#define tx4939ide_swizzlel(a) ((a) ^ 4) 76#define tx4939ide_swizzlew(a) ((a) ^ 6) 77#define tx4939ide_swizzleb(a) ((a) ^ 7) 78#else 79#define tx4939ide_swizzlel(a) (a) 80#define tx4939ide_swizzlew(a) (a) 81#define tx4939ide_swizzleb(a) (a) 82#endif 83 84static u16 tx4939ide_readw(void __iomem *base, u32 reg) 85{ 86 return __raw_readw(base + tx4939ide_swizzlew(reg)); 87} 88static u8 tx4939ide_readb(void __iomem *base, u32 reg) 89{ 90 return __raw_readb(base + tx4939ide_swizzleb(reg)); 91} 92static void tx4939ide_writel(u32 val, void __iomem *base, u32 reg) 93{ 94 __raw_writel(val, base + tx4939ide_swizzlel(reg)); 95} 96static void tx4939ide_writew(u16 val, void __iomem *base, u32 reg) 97{ 98 __raw_writew(val, base + tx4939ide_swizzlew(reg)); 99} 100static void tx4939ide_writeb(u8 val, void __iomem *base, u32 reg) 101{ 102 __raw_writeb(val, base + tx4939ide_swizzleb(reg)); 103} 104 105#define TX4939IDE_BASE(hwif) ((void __iomem *)(hwif)->extra_base) 106 107static void tx4939ide_set_pio_mode(ide_drive_t *drive, const u8 pio) 108{ 109 ide_hwif_t *hwif = drive->hwif; 110 int is_slave = drive->dn; 111 u32 mask, val; 112 u8 safe = pio; 113 ide_drive_t *pair; 114 115 pair = ide_get_pair_dev(drive); 116 if (pair) 117 safe = min(safe, ide_get_best_pio_mode(pair, 255, 4)); 118 /* 119 * Update Command Transfer Mode for master/slave and Data 120 * Transfer Mode for this drive. 121 */ 122 mask = is_slave ? 0x07f00000 : 0x000007f0; 123 val = ((safe << 8) | (pio << 4)) << (is_slave ? 16 : 0); 124 hwif->select_data = (hwif->select_data & ~mask) | val; 125 /* tx4939ide_tf_load_fixup() will set the Sys_Ctl register */ 126} 127 128static void tx4939ide_set_dma_mode(ide_drive_t *drive, const u8 mode) 129{ 130 ide_hwif_t *hwif = drive->hwif; 131 u32 mask, val; 132 133 /* Update Data Transfer Mode for this drive. */ 134 if (mode >= XFER_UDMA_0) 135 val = mode - XFER_UDMA_0 + 8; 136 else 137 val = mode - XFER_MW_DMA_0 + 5; 138 if (drive->dn) { 139 mask = 0x00f00000; 140 val <<= 20; 141 } else { 142 mask = 0x000000f0; 143 val <<= 4; 144 } 145 hwif->select_data = (hwif->select_data & ~mask) | val; 146 /* tx4939ide_tf_load_fixup() will set the Sys_Ctl register */ 147} 148 149static u16 tx4939ide_check_error_ints(ide_hwif_t *hwif) 150{ 151 void __iomem *base = TX4939IDE_BASE(hwif); 152 u16 ctl = tx4939ide_readw(base, TX4939IDE_Int_Ctl); 153 154 if (ctl & TX4939IDE_INT_BUSERR) { 155 /* reset FIFO */ 156 u16 sysctl = tx4939ide_readw(base, TX4939IDE_Sys_Ctl); 157 158 tx4939ide_writew(sysctl | 0x4000, base, TX4939IDE_Sys_Ctl); 159 mmiowb(); 160 /* wait 12GBUSCLK (typ. 60ns @ GBUS200MHz, max 270ns) */ 161 ndelay(270); 162 tx4939ide_writew(sysctl, base, TX4939IDE_Sys_Ctl); 163 } 164 if (ctl & (TX4939IDE_INT_ADDRERR | 165 TX4939IDE_INT_DEVTIMING | TX4939IDE_INT_BUSERR)) 166 pr_err("%s: Error interrupt %#x (%s%s%s )\n", 167 hwif->name, ctl, 168 ctl & TX4939IDE_INT_ADDRERR ? " Address-Error" : "", 169 ctl & TX4939IDE_INT_DEVTIMING ? " DEV-Timing" : "", 170 ctl & TX4939IDE_INT_BUSERR ? " Bus-Error" : ""); 171 return ctl; 172} 173 174static void tx4939ide_clear_irq(ide_drive_t *drive) 175{ 176 ide_hwif_t *hwif; 177 void __iomem *base; 178 u16 ctl; 179 180 /* 181 * tx4939ide_dma_test_irq() and tx4939ide_dma_end() do all job 182 * for DMA case. 183 */ 184 if (drive->waiting_for_dma) 185 return; 186 hwif = drive->hwif; 187 base = TX4939IDE_BASE(hwif); 188 ctl = tx4939ide_check_error_ints(hwif); 189 tx4939ide_writew(ctl, base, TX4939IDE_Int_Ctl); 190} 191 192static u8 tx4939ide_cable_detect(ide_hwif_t *hwif) 193{ 194 void __iomem *base = TX4939IDE_BASE(hwif); 195 196 return tx4939ide_readw(base, TX4939IDE_Sys_Ctl) & 0x2000 ? 197 ATA_CBL_PATA40 : ATA_CBL_PATA80; 198} 199 200#ifdef __BIG_ENDIAN 201static void tx4939ide_dma_host_set(ide_drive_t *drive, int on) 202{ 203 ide_hwif_t *hwif = drive->hwif; 204 u8 unit = drive->dn; 205 void __iomem *base = TX4939IDE_BASE(hwif); 206 u8 dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat); 207 208 if (on) 209 dma_stat |= (1 << (5 + unit)); 210 else 211 dma_stat &= ~(1 << (5 + unit)); 212 213 tx4939ide_writeb(dma_stat, base, TX4939IDE_DMA_Stat); 214} 215#else 216#define tx4939ide_dma_host_set ide_dma_host_set 217#endif 218 219static u8 tx4939ide_clear_dma_status(void __iomem *base) 220{ 221 u8 dma_stat; 222 223 /* read DMA status for INTR & ERROR flags */ 224 dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat); 225 /* clear INTR & ERROR flags */ 226 tx4939ide_writeb(dma_stat | ATA_DMA_INTR | ATA_DMA_ERR, base, 227 TX4939IDE_DMA_Stat); 228 /* recover intmask cleared by writing to bit2 of DMA_Stat */ 229 tx4939ide_writew(TX4939IDE_IGNORE_INTS << 8, base, TX4939IDE_Int_Ctl); 230 return dma_stat; 231} 232 233#ifdef __BIG_ENDIAN 234/* custom ide_build_dmatable to handle swapped layout */ 235static int tx4939ide_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd) 236{ 237 ide_hwif_t *hwif = drive->hwif; 238 u32 *table = (u32 *)hwif->dmatable_cpu; 239 unsigned int count = 0; 240 int i; 241 struct scatterlist *sg; 242 243 for_each_sg(hwif->sg_table, sg, cmd->sg_nents, i) { 244 u32 cur_addr, cur_len, bcount; 245 246 cur_addr = sg_dma_address(sg); 247 cur_len = sg_dma_len(sg); 248 249 /* 250 * Fill in the DMA table, without crossing any 64kB boundaries. 251 */ 252 253 while (cur_len) { 254 if (count++ >= PRD_ENTRIES) 255 goto use_pio_instead; 256 257 bcount = 0x10000 - (cur_addr & 0xffff); 258 if (bcount > cur_len) 259 bcount = cur_len; 260 /* 261 * This workaround for zero count seems required. 262 * (standard ide_build_dmatable does it too) 263 */ 264 if (bcount == 0x10000) 265 bcount = 0x8000; 266 *table++ = bcount & 0xffff; 267 *table++ = cur_addr; 268 cur_addr += bcount; 269 cur_len -= bcount; 270 } 271 } 272 273 if (count) { 274 *(table - 2) |= 0x80000000; 275 return count; 276 } 277 278use_pio_instead: 279 printk(KERN_ERR "%s: %s\n", drive->name, 280 count ? "DMA table too small" : "empty DMA table?"); 281 282 return 0; /* revert to PIO for this request */ 283} 284#else 285#define tx4939ide_build_dmatable ide_build_dmatable 286#endif 287 288static int tx4939ide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd) 289{ 290 ide_hwif_t *hwif = drive->hwif; 291 void __iomem *base = TX4939IDE_BASE(hwif); 292 u8 rw = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 0 : ATA_DMA_WR; 293 294 /* fall back to PIO! */ 295 if (tx4939ide_build_dmatable(drive, cmd) == 0) 296 return 1; 297 298 /* PRD table */ 299 tx4939ide_writel(hwif->dmatable_dma, base, TX4939IDE_PRD_Ptr); 300 301 /* specify r/w */ 302 tx4939ide_writeb(rw, base, TX4939IDE_DMA_Cmd); 303 304 /* clear INTR & ERROR flags */ 305 tx4939ide_clear_dma_status(base); 306 307 tx4939ide_writew(SECTOR_SIZE / 2, base, drive->dn ? 308 TX4939IDE_Xfer_Cnt_2 : TX4939IDE_Xfer_Cnt_1); 309 310 tx4939ide_writew(cmd->rq->nr_sectors, base, TX4939IDE_Sec_Cnt); 311 312 return 0; 313} 314 315static int tx4939ide_dma_end(ide_drive_t *drive) 316{ 317 ide_hwif_t *hwif = drive->hwif; 318 u8 dma_stat, dma_cmd; 319 void __iomem *base = TX4939IDE_BASE(hwif); 320 u16 ctl = tx4939ide_readw(base, TX4939IDE_Int_Ctl); 321 322 /* get DMA command mode */ 323 dma_cmd = tx4939ide_readb(base, TX4939IDE_DMA_Cmd); 324 /* stop DMA */ 325 tx4939ide_writeb(dma_cmd & ~ATA_DMA_START, base, TX4939IDE_DMA_Cmd); 326 327 /* read and clear the INTR & ERROR bits */ 328 dma_stat = tx4939ide_clear_dma_status(base); 329 330 wmb(); 331 332 /* verify good DMA status */ 333 if ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) == 0 && 334 (ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST)) == 335 (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST)) 336 /* INT_IDE lost... bug? */ 337 return 0; 338 return ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) != 339 ATA_DMA_INTR) ? 0x10 | dma_stat : 0; 340} 341 342/* returns 1 if DMA IRQ issued, 0 otherwise */ 343static int tx4939ide_dma_test_irq(ide_drive_t *drive) 344{ 345 ide_hwif_t *hwif = drive->hwif; 346 void __iomem *base = TX4939IDE_BASE(hwif); 347 u16 ctl, ide_int; 348 u8 dma_stat, stat; 349 int found = 0; 350 351 ctl = tx4939ide_check_error_ints(hwif); 352 ide_int = ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST); 353 switch (ide_int) { 354 case TX4939IDE_INT_HOST: 355 /* On error, XFEREND might not be asserted. */ 356 stat = tx4939ide_readb(base, TX4939IDE_AltStat_DevCtl); 357 if ((stat & (ATA_BUSY | ATA_DRQ | ATA_ERR)) == ATA_ERR) 358 found = 1; 359 else 360 /* Wait for XFEREND (Mask HOST and unmask XFEREND) */ 361 ctl &= ~TX4939IDE_INT_XFEREND << 8; 362 ctl |= ide_int << 8; 363 break; 364 case TX4939IDE_INT_HOST | TX4939IDE_INT_XFEREND: 365 dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat); 366 if (!(dma_stat & ATA_DMA_INTR)) 367 pr_warning("%s: weird interrupt status. " 368 "DMA_Stat %#02x int_ctl %#04x\n", 369 hwif->name, dma_stat, ctl); 370 found = 1; 371 break; 372 } 373 /* 374 * Do not clear XFEREND, HOST now. They will be cleared by 375 * clearing bit2 of DMA_Stat. 376 */ 377 ctl &= ~ide_int; 378 tx4939ide_writew(ctl, base, TX4939IDE_Int_Ctl); 379 return found; 380} 381 382#ifdef __BIG_ENDIAN 383static u8 tx4939ide_dma_sff_read_status(ide_hwif_t *hwif) 384{ 385 void __iomem *base = TX4939IDE_BASE(hwif); 386 387 return tx4939ide_readb(base, TX4939IDE_DMA_Stat); 388} 389#else 390#define tx4939ide_dma_sff_read_status ide_dma_sff_read_status 391#endif 392 393static void tx4939ide_init_hwif(ide_hwif_t *hwif) 394{ 395 void __iomem *base = TX4939IDE_BASE(hwif); 396 397 /* Soft Reset */ 398 tx4939ide_writew(0x8000, base, TX4939IDE_Sys_Ctl); 399 mmiowb(); 400 /* at least 20 GBUSCLK (typ. 100ns @ GBUS200MHz, max 450ns) */ 401 ndelay(450); 402 tx4939ide_writew(0x0000, base, TX4939IDE_Sys_Ctl); 403 /* mask some interrupts and clear all interrupts */ 404 tx4939ide_writew((TX4939IDE_IGNORE_INTS << 8) | 0xff, base, 405 TX4939IDE_Int_Ctl); 406 407 tx4939ide_writew(0x0008, base, TX4939IDE_Lo_Burst_Cnt); 408 tx4939ide_writew(0, base, TX4939IDE_Up_Burst_Cnt); 409} 410 411static int tx4939ide_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d) 412{ 413 hwif->dma_base = 414 hwif->extra_base + tx4939ide_swizzleb(TX4939IDE_DMA_Cmd); 415 /* 416 * Note that we cannot use ATA_DMA_TABLE_OFS, ATA_DMA_STATUS 417 * for big endian. 418 */ 419 return ide_allocate_dma_engine(hwif); 420} 421 422static void tx4939ide_tf_load_fixup(ide_drive_t *drive) 423{ 424 ide_hwif_t *hwif = drive->hwif; 425 void __iomem *base = TX4939IDE_BASE(hwif); 426 u16 sysctl = hwif->select_data >> (drive->dn ? 16 : 0); 427 428 /* 429 * Fix ATA100 CORE System Control Register. (The write to the 430 * Device/Head register may write wrong data to the System 431 * Control Register) 432 * While Sys_Ctl is written here, selectproc is not needed. 433 */ 434 tx4939ide_writew(sysctl, base, TX4939IDE_Sys_Ctl); 435} 436 437#ifdef __BIG_ENDIAN 438 439/* custom iops (independent from SWAP_IO_SPACE) */ 440static u8 tx4939ide_inb(unsigned long port) 441{ 442 return __raw_readb((void __iomem *)port); 443} 444 445static void tx4939ide_outb(u8 value, unsigned long port) 446{ 447 __raw_writeb(value, (void __iomem *)port); 448} 449 450static void tx4939ide_tf_load(ide_drive_t *drive, struct ide_cmd *cmd) 451{ 452 ide_hwif_t *hwif = drive->hwif; 453 struct ide_io_ports *io_ports = &hwif->io_ports; 454 struct ide_taskfile *tf = &cmd->tf; 455 u8 HIHI = cmd->tf_flags & IDE_TFLAG_LBA48 ? 0xE0 : 0xEF; 456 457 if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED) 458 HIHI = 0xFF; 459 460 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) { 461 u16 data = (tf->hob_data << 8) | tf->data; 462 463 /* no endian swap */ 464 __raw_writew(data, (void __iomem *)io_ports->data_addr); 465 } 466 467 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE) 468 tx4939ide_outb(tf->hob_feature, io_ports->feature_addr); 469 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_NSECT) 470 tx4939ide_outb(tf->hob_nsect, io_ports->nsect_addr); 471 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAL) 472 tx4939ide_outb(tf->hob_lbal, io_ports->lbal_addr); 473 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAM) 474 tx4939ide_outb(tf->hob_lbam, io_ports->lbam_addr); 475 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAH) 476 tx4939ide_outb(tf->hob_lbah, io_ports->lbah_addr); 477 478 if (cmd->tf_flags & IDE_TFLAG_OUT_FEATURE) 479 tx4939ide_outb(tf->feature, io_ports->feature_addr); 480 if (cmd->tf_flags & IDE_TFLAG_OUT_NSECT) 481 tx4939ide_outb(tf->nsect, io_ports->nsect_addr); 482 if (cmd->tf_flags & IDE_TFLAG_OUT_LBAL) 483 tx4939ide_outb(tf->lbal, io_ports->lbal_addr); 484 if (cmd->tf_flags & IDE_TFLAG_OUT_LBAM) 485 tx4939ide_outb(tf->lbam, io_ports->lbam_addr); 486 if (cmd->tf_flags & IDE_TFLAG_OUT_LBAH) 487 tx4939ide_outb(tf->lbah, io_ports->lbah_addr); 488 489 if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE) { 490 tx4939ide_outb((tf->device & HIHI) | drive->select, 491 io_ports->device_addr); 492 tx4939ide_tf_load_fixup(drive); 493 } 494} 495 496static void tx4939ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd) 497{ 498 ide_hwif_t *hwif = drive->hwif; 499 struct ide_io_ports *io_ports = &hwif->io_ports; 500 struct ide_taskfile *tf = &cmd->tf; 501 502 if (cmd->ftf_flags & IDE_FTFLAG_IN_DATA) { 503 u16 data; 504 505 /* no endian swap */ 506 data = __raw_readw((void __iomem *)io_ports->data_addr); 507 tf->data = data & 0xff; 508 tf->hob_data = (data >> 8) & 0xff; 509 } 510 511 /* be sure we're looking at the low order bits */ 512 tx4939ide_outb(ATA_DEVCTL_OBS, io_ports->ctl_addr); 513 514 if (cmd->tf_flags & IDE_TFLAG_IN_ERROR) 515 tf->error = tx4939ide_inb(io_ports->feature_addr); 516 if (cmd->tf_flags & IDE_TFLAG_IN_NSECT) 517 tf->nsect = tx4939ide_inb(io_ports->nsect_addr); 518 if (cmd->tf_flags & IDE_TFLAG_IN_LBAL) 519 tf->lbal = tx4939ide_inb(io_ports->lbal_addr); 520 if (cmd->tf_flags & IDE_TFLAG_IN_LBAM) 521 tf->lbam = tx4939ide_inb(io_ports->lbam_addr); 522 if (cmd->tf_flags & IDE_TFLAG_IN_LBAH) 523 tf->lbah = tx4939ide_inb(io_ports->lbah_addr); 524 if (cmd->tf_flags & IDE_TFLAG_IN_DEVICE) 525 tf->device = tx4939ide_inb(io_ports->device_addr); 526 527 if (cmd->tf_flags & IDE_TFLAG_LBA48) { 528 tx4939ide_outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr); 529 530 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR) 531 tf->hob_error = tx4939ide_inb(io_ports->feature_addr); 532 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT) 533 tf->hob_nsect = tx4939ide_inb(io_ports->nsect_addr); 534 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL) 535 tf->hob_lbal = tx4939ide_inb(io_ports->lbal_addr); 536 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM) 537 tf->hob_lbam = tx4939ide_inb(io_ports->lbam_addr); 538 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH) 539 tf->hob_lbah = tx4939ide_inb(io_ports->lbah_addr); 540 } 541} 542 543static void tx4939ide_input_data_swap(ide_drive_t *drive, struct request *rq, 544 void *buf, unsigned int len) 545{ 546 unsigned long port = drive->hwif->io_ports.data_addr; 547 unsigned short *ptr = buf; 548 unsigned int count = (len + 1) / 2; 549 550 while (count--) 551 *ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port)); 552 __ide_flush_dcache_range((unsigned long)buf, roundup(len, 2)); 553} 554 555static void tx4939ide_output_data_swap(ide_drive_t *drive, struct request *rq, 556 void *buf, unsigned int len) 557{ 558 unsigned long port = drive->hwif->io_ports.data_addr; 559 unsigned short *ptr = buf; 560 unsigned int count = (len + 1) / 2; 561 562 while (count--) { 563 __raw_writew(le16_to_cpu(*ptr), (void __iomem *)port); 564 ptr++; 565 } 566 __ide_flush_dcache_range((unsigned long)buf, roundup(len, 2)); 567} 568 569static const struct ide_tp_ops tx4939ide_tp_ops = { 570 .exec_command = ide_exec_command, 571 .read_status = ide_read_status, 572 .read_altstatus = ide_read_altstatus, 573 .write_devctl = ide_write_devctl, 574 575 .tf_load = tx4939ide_tf_load, 576 .tf_read = tx4939ide_tf_read, 577 578 .input_data = tx4939ide_input_data_swap, 579 .output_data = tx4939ide_output_data_swap, 580}; 581 582#else /* __LITTLE_ENDIAN */ 583 584static void tx4939ide_tf_load(ide_drive_t *drive, struct ide_cmd *cmd) 585{ 586 ide_tf_load(drive, cmd); 587 588 if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE) 589 tx4939ide_tf_load_fixup(drive); 590} 591 592static const struct ide_tp_ops tx4939ide_tp_ops = { 593 .exec_command = ide_exec_command, 594 .read_status = ide_read_status, 595 .read_altstatus = ide_read_altstatus, 596 .write_devctl = ide_write_devctl, 597 598 .tf_load = tx4939ide_tf_load, 599 .tf_read = ide_tf_read, 600 601 .input_data = ide_input_data, 602 .output_data = ide_output_data, 603}; 604 605#endif /* __LITTLE_ENDIAN */ 606 607static const struct ide_port_ops tx4939ide_port_ops = { 608 .set_pio_mode = tx4939ide_set_pio_mode, 609 .set_dma_mode = tx4939ide_set_dma_mode, 610 .clear_irq = tx4939ide_clear_irq, 611 .cable_detect = tx4939ide_cable_detect, 612}; 613 614static const struct ide_dma_ops tx4939ide_dma_ops = { 615 .dma_host_set = tx4939ide_dma_host_set, 616 .dma_setup = tx4939ide_dma_setup, 617 .dma_start = ide_dma_start, 618 .dma_end = tx4939ide_dma_end, 619 .dma_test_irq = tx4939ide_dma_test_irq, 620 .dma_lost_irq = ide_dma_lost_irq, 621 .dma_timer_expiry = ide_dma_sff_timer_expiry, 622 .dma_sff_read_status = tx4939ide_dma_sff_read_status, 623}; 624 625static const struct ide_port_info tx4939ide_port_info __initdata = { 626 .init_hwif = tx4939ide_init_hwif, 627 .init_dma = tx4939ide_init_dma, 628 .port_ops = &tx4939ide_port_ops, 629 .dma_ops = &tx4939ide_dma_ops, 630 .tp_ops = &tx4939ide_tp_ops, 631 .host_flags = IDE_HFLAG_MMIO, 632 .pio_mask = ATA_PIO4, 633 .mwdma_mask = ATA_MWDMA2, 634 .udma_mask = ATA_UDMA5, 635 .chipset = ide_generic, 636}; 637 638static int __init tx4939ide_probe(struct platform_device *pdev) 639{ 640 hw_regs_t hw; 641 hw_regs_t *hws[] = { &hw, NULL, NULL, NULL }; 642 struct ide_host *host; 643 struct resource *res; 644 int irq, ret; 645 unsigned long mapbase; 646 647 irq = platform_get_irq(pdev, 0); 648 if (irq < 0) 649 return -ENODEV; 650 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 651 if (!res) 652 return -ENODEV; 653 654 if (!devm_request_mem_region(&pdev->dev, res->start, 655 res->end - res->start + 1, "tx4938ide")) 656 return -EBUSY; 657 mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start, 658 res->end - res->start + 1); 659 if (!mapbase) 660 return -EBUSY; 661 memset(&hw, 0, sizeof(hw)); 662 hw.io_ports.data_addr = 663 mapbase + tx4939ide_swizzlew(TX4939IDE_Data); 664 hw.io_ports.error_addr = 665 mapbase + tx4939ide_swizzleb(TX4939IDE_Error_Feature); 666 hw.io_ports.nsect_addr = 667 mapbase + tx4939ide_swizzleb(TX4939IDE_Sec); 668 hw.io_ports.lbal_addr = 669 mapbase + tx4939ide_swizzleb(TX4939IDE_LBA0); 670 hw.io_ports.lbam_addr = 671 mapbase + tx4939ide_swizzleb(TX4939IDE_LBA1); 672 hw.io_ports.lbah_addr = 673 mapbase + tx4939ide_swizzleb(TX4939IDE_LBA2); 674 hw.io_ports.device_addr = 675 mapbase + tx4939ide_swizzleb(TX4939IDE_DevHead); 676 hw.io_ports.command_addr = 677 mapbase + tx4939ide_swizzleb(TX4939IDE_Stat_Cmd); 678 hw.io_ports.ctl_addr = 679 mapbase + tx4939ide_swizzleb(TX4939IDE_AltStat_DevCtl); 680 hw.irq = irq; 681 hw.dev = &pdev->dev; 682 683 pr_info("TX4939 IDE interface (base %#lx, irq %d)\n", mapbase, irq); 684 host = ide_host_alloc(&tx4939ide_port_info, hws); 685 if (!host) 686 return -ENOMEM; 687 /* use extra_base for base address of the all registers */ 688 host->ports[0]->extra_base = mapbase; 689 ret = ide_host_register(host, &tx4939ide_port_info, hws); 690 if (ret) { 691 ide_host_free(host); 692 return ret; 693 } 694 platform_set_drvdata(pdev, host); 695 return 0; 696} 697 698static int __exit tx4939ide_remove(struct platform_device *pdev) 699{ 700 struct ide_host *host = platform_get_drvdata(pdev); 701 702 ide_host_remove(host); 703 return 0; 704} 705 706#ifdef CONFIG_PM 707static int tx4939ide_resume(struct platform_device *dev) 708{ 709 struct ide_host *host = platform_get_drvdata(dev); 710 ide_hwif_t *hwif = host->ports[0]; 711 712 tx4939ide_init_hwif(hwif); 713 return 0; 714} 715#else 716#define tx4939ide_resume NULL 717#endif 718 719static struct platform_driver tx4939ide_driver = { 720 .driver = { 721 .name = MODNAME, 722 .owner = THIS_MODULE, 723 }, 724 .remove = __exit_p(tx4939ide_remove), 725 .resume = tx4939ide_resume, 726}; 727 728static int __init tx4939ide_init(void) 729{ 730 return platform_driver_probe(&tx4939ide_driver, tx4939ide_probe); 731} 732 733static void __exit tx4939ide_exit(void) 734{ 735 platform_driver_unregister(&tx4939ide_driver); 736} 737 738module_init(tx4939ide_init); 739module_exit(tx4939ide_exit); 740 741MODULE_DESCRIPTION("TX4939 internal IDE driver"); 742MODULE_LICENSE("GPL"); 743MODULE_ALIAS("platform:tx4939ide"); 744