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Revert "Staging: comedi: integer overflow in do_insnlist_ioctl()"
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ide / scc_pata.c
blobb7f5b0c4310c2e18558f222b217b1ed9a4f3e0b4
1 /*
2 * Support for IDE interfaces on Celleb platform
3 *
4 * (C) Copyright 2006 TOSHIBA CORPORATION
5 *
6 * This code is based on drivers/ide/pci/siimage.c:
7 * Copyright (C) 2001-2002 Andre Hedrick <andre@linux-ide.org>
8 * Copyright (C) 2003 Red Hat
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 */
24
25 #include <linux/types.h>
26 #include <linux/module.h>
27 #include <linux/pci.h>
28 #include <linux/delay.h>
29 #include <linux/ide.h>
30 #include <linux/init.h>
31
32 #define PCI_DEVICE_ID_TOSHIBA_SCC_ATA 0x01b4
33
34 #define SCC_PATA_NAME "scc IDE"
35
36 #define TDVHSEL_MASTER 0x00000001
37 #define TDVHSEL_SLAVE 0x00000004
38
39 #define MODE_JCUSFEN 0x00000080
40
41 #define CCKCTRL_ATARESET 0x00040000
42 #define CCKCTRL_BUFCNT 0x00020000
43 #define CCKCTRL_CRST 0x00010000
44 #define CCKCTRL_OCLKEN 0x00000100
45 #define CCKCTRL_ATACLKOEN 0x00000002
46 #define CCKCTRL_LCLKEN 0x00000001
47
48 #define QCHCD_IOS_SS 0x00000001
49
50 #define QCHSD_STPDIAG 0x00020000
51
52 #define INTMASK_MSK 0xD1000012
53 #define INTSTS_SERROR 0x80000000
54 #define INTSTS_PRERR 0x40000000
55 #define INTSTS_RERR 0x10000000
56 #define INTSTS_ICERR 0x01000000
57 #define INTSTS_BMSINT 0x00000010
58 #define INTSTS_BMHE 0x00000008
59 #define INTSTS_IOIRQS 0x00000004
60 #define INTSTS_INTRQ 0x00000002
61 #define INTSTS_ACTEINT 0x00000001
62
63 #define ECMODE_VALUE 0x01
64
65 static struct scc_ports {
66 unsigned long ctl, dma;
67 struct ide_host *host; /* for removing port from system */
68 } scc_ports[MAX_HWIFS];
69
70 /* PIO transfer mode table */
71 /* JCHST */
72 static unsigned long JCHSTtbl[2][7] = {
73 {0x0E, 0x05, 0x02, 0x03, 0x02, 0x00, 0x00}, /* 100MHz */
74 {0x13, 0x07, 0x04, 0x04, 0x03, 0x00, 0x00} /* 133MHz */
75 };
76
77 /* JCHHT */
78 static unsigned long JCHHTtbl[2][7] = {
79 {0x0E, 0x02, 0x02, 0x02, 0x02, 0x00, 0x00}, /* 100MHz */
80 {0x13, 0x03, 0x03, 0x03, 0x03, 0x00, 0x00} /* 133MHz */
81 };
82
83 /* JCHCT */
84 static unsigned long JCHCTtbl[2][7] = {
85 {0x1D, 0x1D, 0x1C, 0x0B, 0x06, 0x00, 0x00}, /* 100MHz */
86 {0x27, 0x26, 0x26, 0x0E, 0x09, 0x00, 0x00} /* 133MHz */
87 };
88
89
90 /* DMA transfer mode table */
91 /* JCHDCTM/JCHDCTS */
92 static unsigned long JCHDCTxtbl[2][7] = {
93 {0x0A, 0x06, 0x04, 0x03, 0x01, 0x00, 0x00}, /* 100MHz */
94 {0x0E, 0x09, 0x06, 0x04, 0x02, 0x01, 0x00} /* 133MHz */
95 };
96
97 /* JCSTWTM/JCSTWTS */
98 static unsigned long JCSTWTxtbl[2][7] = {
99 {0x06, 0x04, 0x03, 0x02, 0x02, 0x02, 0x00}, /* 100MHz */
100 {0x09, 0x06, 0x04, 0x02, 0x02, 0x02, 0x02} /* 133MHz */
101 };
102
103 /* JCTSS */
104 static unsigned long JCTSStbl[2][7] = {
105 {0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x00}, /* 100MHz */
106 {0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05} /* 133MHz */
107 };
108
109 /* JCENVT */
110 static unsigned long JCENVTtbl[2][7] = {
111 {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00}, /* 100MHz */
112 {0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02} /* 133MHz */
113 };
114
115 /* JCACTSELS/JCACTSELM */
116 static unsigned long JCACTSELtbl[2][7] = {
117 {0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00}, /* 100MHz */
118 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01} /* 133MHz */
119 };
120
121
122 static u8 scc_ide_inb(unsigned long port)
123 {
124 u32 data = in_be32((void*)port);
125 return (u8)data;
126 }
127
128 static void scc_exec_command(ide_hwif_t *hwif, u8 cmd)
129 {
130 out_be32((void *)hwif->io_ports.command_addr, cmd);
131 eieio();
132 in_be32((void *)(hwif->dma_base + 0x01c));
133 eieio();
134 }
135
136 static u8 scc_read_status(ide_hwif_t *hwif)
137 {
138 return (u8)in_be32((void *)hwif->io_ports.status_addr);
139 }
140
141 static u8 scc_read_altstatus(ide_hwif_t *hwif)
142 {
143 return (u8)in_be32((void *)hwif->io_ports.ctl_addr);
144 }
145
146 static u8 scc_dma_sff_read_status(ide_hwif_t *hwif)
147 {
148 return (u8)in_be32((void *)(hwif->dma_base + 4));
149 }
150
151 static void scc_write_devctl(ide_hwif_t *hwif, u8 ctl)
152 {
153 out_be32((void *)hwif->io_ports.ctl_addr, ctl);
154 eieio();
155 in_be32((void *)(hwif->dma_base + 0x01c));
156 eieio();
157 }
158
159 static void scc_ide_insw(unsigned long port, void *addr, u32 count)
160 {
161 u16 *ptr = (u16 *)addr;
162 while (count--) {
163 *ptr++ = le16_to_cpu(in_be32((void*)port));
164 }
165 }
166
167 static void scc_ide_insl(unsigned long port, void *addr, u32 count)
168 {
169 u16 *ptr = (u16 *)addr;
170 while (count--) {
171 *ptr++ = le16_to_cpu(in_be32((void*)port));
172 *ptr++ = le16_to_cpu(in_be32((void*)port));
173 }
174 }
175
176 static void scc_ide_outb(u8 addr, unsigned long port)
177 {
178 out_be32((void*)port, addr);
179 }
180
181 static void
182 scc_ide_outsw(unsigned long port, void *addr, u32 count)
183 {
184 u16 *ptr = (u16 *)addr;
185 while (count--) {
186 out_be32((void*)port, cpu_to_le16(*ptr++));
187 }
188 }
189
190 static void
191 scc_ide_outsl(unsigned long port, void *addr, u32 count)
192 {
193 u16 *ptr = (u16 *)addr;
194 while (count--) {
195 out_be32((void*)port, cpu_to_le16(*ptr++));
196 out_be32((void*)port, cpu_to_le16(*ptr++));
197 }
198 }
199
200 /**
201 * scc_set_pio_mode - set host controller for PIO mode
202 * @hwif: port
203 * @drive: drive
204 *
205 * Load the timing settings for this device mode into the
206 * controller.
207 */
208
209 static void scc_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
210 {
211 struct scc_ports *ports = ide_get_hwifdata(hwif);
212 unsigned long ctl_base = ports->ctl;
213 unsigned long cckctrl_port = ctl_base + 0xff0;
214 unsigned long piosht_port = ctl_base + 0x000;
215 unsigned long pioct_port = ctl_base + 0x004;
216 unsigned long reg;
217 int offset;
218 const u8 pio = drive->pio_mode - XFER_PIO_0;
219
220 reg = in_be32((void __iomem *)cckctrl_port);
221 if (reg & CCKCTRL_ATACLKOEN) {
222 offset = 1; /* 133MHz */
223 } else {
224 offset = 0; /* 100MHz */
225 }
226 reg = JCHSTtbl[offset][pio] << 16 | JCHHTtbl[offset][pio];
227 out_be32((void __iomem *)piosht_port, reg);
228 reg = JCHCTtbl[offset][pio];
229 out_be32((void __iomem *)pioct_port, reg);
230 }
231
232 /**
233 * scc_set_dma_mode - set host controller for DMA mode
234 * @hwif: port
235 * @drive: drive
236 *
237 * Load the timing settings for this device mode into the
238 * controller.
239 */
240
241 static void scc_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
242 {
243 struct scc_ports *ports = ide_get_hwifdata(hwif);
244 unsigned long ctl_base = ports->ctl;
245 unsigned long cckctrl_port = ctl_base + 0xff0;
246 unsigned long mdmact_port = ctl_base + 0x008;
247 unsigned long mcrcst_port = ctl_base + 0x00c;
248 unsigned long sdmact_port = ctl_base + 0x010;
249 unsigned long scrcst_port = ctl_base + 0x014;
250 unsigned long udenvt_port = ctl_base + 0x018;
251 unsigned long tdvhsel_port = ctl_base + 0x020;
252 int is_slave = drive->dn & 1;
253 int offset, idx;
254 unsigned long reg;
255 unsigned long jcactsel;
256 const u8 speed = drive->dma_mode;
257
258 reg = in_be32((void __iomem *)cckctrl_port);
259 if (reg & CCKCTRL_ATACLKOEN) {
260 offset = 1; /* 133MHz */
261 } else {
262 offset = 0; /* 100MHz */
263 }
264
265 idx = speed - XFER_UDMA_0;
266
267 jcactsel = JCACTSELtbl[offset][idx];
268 if (is_slave) {
269 out_be32((void __iomem *)sdmact_port, JCHDCTxtbl[offset][idx]);
270 out_be32((void __iomem *)scrcst_port, JCSTWTxtbl[offset][idx]);
271 jcactsel = jcactsel << 2;
272 out_be32((void __iomem *)tdvhsel_port, (in_be32((void __iomem *)tdvhsel_port) & ~TDVHSEL_SLAVE) | jcactsel);
273 } else {
274 out_be32((void __iomem *)mdmact_port, JCHDCTxtbl[offset][idx]);
275 out_be32((void __iomem *)mcrcst_port, JCSTWTxtbl[offset][idx]);
276 out_be32((void __iomem *)tdvhsel_port, (in_be32((void __iomem *)tdvhsel_port) & ~TDVHSEL_MASTER) | jcactsel);
277 }
278 reg = JCTSStbl[offset][idx] << 16 | JCENVTtbl[offset][idx];
279 out_be32((void __iomem *)udenvt_port, reg);
280 }
281
282 static void scc_dma_host_set(ide_drive_t *drive, int on)
283 {
284 ide_hwif_t *hwif = drive->hwif;
285 u8 unit = drive->dn & 1;
286 u8 dma_stat = scc_dma_sff_read_status(hwif);
287
288 if (on)
289 dma_stat |= (1 << (5 + unit));
290 else
291 dma_stat &= ~(1 << (5 + unit));
292
293 scc_ide_outb(dma_stat, hwif->dma_base + 4);
294 }
295
296 /**
297 * scc_dma_setup - begin a DMA phase
298 * @drive: target device
299 * @cmd: command
300 *
301 * Build an IDE DMA PRD (IDE speak for scatter gather table)
302 * and then set up the DMA transfer registers.
303 *
304 * Returns 0 on success. If a PIO fallback is required then 1
305 * is returned.
306 */
307
308 static int scc_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
309 {
310 ide_hwif_t *hwif = drive->hwif;
311 u32 rw = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 0 : ATA_DMA_WR;
312 u8 dma_stat;
313
314 /* fall back to pio! */
315 if (ide_build_dmatable(drive, cmd) == 0)
316 return 1;
317
318 /* PRD table */
319 out_be32((void __iomem *)(hwif->dma_base + 8), hwif->dmatable_dma);
320
321 /* specify r/w */
322 out_be32((void __iomem *)hwif->dma_base, rw);
323
324 /* read DMA status for INTR & ERROR flags */
325 dma_stat = scc_dma_sff_read_status(hwif);
326
327 /* clear INTR & ERROR flags */
328 out_be32((void __iomem *)(hwif->dma_base + 4), dma_stat | 6);
329
330 return 0;
331 }
332
333 static void scc_dma_start(ide_drive_t *drive)
334 {
335 ide_hwif_t *hwif = drive->hwif;
336 u8 dma_cmd = scc_ide_inb(hwif->dma_base);
337
338 /* start DMA */
339 scc_ide_outb(dma_cmd | 1, hwif->dma_base);
340 }
341
342 static int __scc_dma_end(ide_drive_t *drive)
343 {
344 ide_hwif_t *hwif = drive->hwif;
345 u8 dma_stat, dma_cmd;
346
347 /* get DMA command mode */
348 dma_cmd = scc_ide_inb(hwif->dma_base);
349 /* stop DMA */
350 scc_ide_outb(dma_cmd & ~1, hwif->dma_base);
351 /* get DMA status */
352 dma_stat = scc_dma_sff_read_status(hwif);
353 /* clear the INTR & ERROR bits */
354 scc_ide_outb(dma_stat | 6, hwif->dma_base + 4);
355 /* verify good DMA status */
356 return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0;
357 }
358
359 /**
360 * scc_dma_end - Stop DMA
361 * @drive: IDE drive
362 *
363 * Check and clear INT Status register.
364 * Then call __scc_dma_end().
365 */
366
367 static int scc_dma_end(ide_drive_t *drive)
368 {
369 ide_hwif_t *hwif = drive->hwif;
370 void __iomem *dma_base = (void __iomem *)hwif->dma_base;
371 unsigned long intsts_port = hwif->dma_base + 0x014;
372 u32 reg;
373 int dma_stat, data_loss = 0;
374 static int retry = 0;
375
376 /* errata A308 workaround: Step5 (check data loss) */
377 /* We don't check non ide_disk because it is limited to UDMA4 */
378 if (!(in_be32((void __iomem *)hwif->io_ports.ctl_addr)
379 & ATA_ERR) &&
380 drive->media == ide_disk && drive->current_speed > XFER_UDMA_4) {
381 reg = in_be32((void __iomem *)intsts_port);
382 if (!(reg & INTSTS_ACTEINT)) {
383 printk(KERN_WARNING "%s: operation failed (transfer data loss)\n",
384 drive->name);
385 data_loss = 1;
386 if (retry++) {
387 struct request *rq = hwif->rq;
388 ide_drive_t *drive;
389 int i;
390
391 /* ERROR_RESET and drive->crc_count are needed
392 * to reduce DMA transfer mode in retry process.
393 */
394 if (rq)
395 rq->errors |= ERROR_RESET;
396
397 ide_port_for_each_dev(i, drive, hwif)
398 drive->crc_count++;
399 }
400 }
401 }
402
403 while (1) {
404 reg = in_be32((void __iomem *)intsts_port);
405
406 if (reg & INTSTS_SERROR) {
407 printk(KERN_WARNING "%s: SERROR\n", SCC_PATA_NAME);
408 out_be32((void __iomem *)intsts_port, INTSTS_SERROR|INTSTS_BMSINT);
409
410 out_be32(dma_base, in_be32(dma_base) & ~QCHCD_IOS_SS);
411 continue;
412 }
413
414 if (reg & INTSTS_PRERR) {
415 u32 maea0, maec0;
416 unsigned long ctl_base = hwif->config_data;
417
418 maea0 = in_be32((void __iomem *)(ctl_base + 0xF50));
419 maec0 = in_be32((void __iomem *)(ctl_base + 0xF54));
420
421 printk(KERN_WARNING "%s: PRERR [addr:%x cmd:%x]\n", SCC_PATA_NAME, maea0, maec0);
422
423 out_be32((void __iomem *)intsts_port, INTSTS_PRERR|INTSTS_BMSINT);
424
425 out_be32(dma_base, in_be32(dma_base) & ~QCHCD_IOS_SS);
426 continue;
427 }
428
429 if (reg & INTSTS_RERR) {
430 printk(KERN_WARNING "%s: Response Error\n", SCC_PATA_NAME);
431 out_be32((void __iomem *)intsts_port, INTSTS_RERR|INTSTS_BMSINT);
432
433 out_be32(dma_base, in_be32(dma_base) & ~QCHCD_IOS_SS);
434 continue;
435 }
436
437 if (reg & INTSTS_ICERR) {
438 out_be32(dma_base, in_be32(dma_base) & ~QCHCD_IOS_SS);
439
440 printk(KERN_WARNING "%s: Illegal Configuration\n", SCC_PATA_NAME);
441 out_be32((void __iomem *)intsts_port, INTSTS_ICERR|INTSTS_BMSINT);
442 continue;
443 }
444
445 if (reg & INTSTS_BMSINT) {
446 printk(KERN_WARNING "%s: Internal Bus Error\n", SCC_PATA_NAME);
447 out_be32((void __iomem *)intsts_port, INTSTS_BMSINT);
448
449 ide_do_reset(drive);
450 continue;
451 }
452
453 if (reg & INTSTS_BMHE) {
454 out_be32((void __iomem *)intsts_port, INTSTS_BMHE);
455 continue;
456 }
457
458 if (reg & INTSTS_ACTEINT) {
459 out_be32((void __iomem *)intsts_port, INTSTS_ACTEINT);
460 continue;
461 }
462
463 if (reg & INTSTS_IOIRQS) {
464 out_be32((void __iomem *)intsts_port, INTSTS_IOIRQS);
465 continue;
466 }
467 break;
468 }
469
470 dma_stat = __scc_dma_end(drive);
471 if (data_loss)
472 dma_stat |= 2; /* emulate DMA error (to retry command) */
473 return dma_stat;
474 }
475
476 /* returns 1 if dma irq issued, 0 otherwise */
477 static int scc_dma_test_irq(ide_drive_t *drive)
478 {
479 ide_hwif_t *hwif = drive->hwif;
480 u32 int_stat = in_be32((void __iomem *)hwif->dma_base + 0x014);
481
482 /* SCC errata A252,A308 workaround: Step4 */
483 if ((in_be32((void __iomem *)hwif->io_ports.ctl_addr)
484 & ATA_ERR) &&
485 (int_stat & INTSTS_INTRQ))
486 return 1;
487
488 /* SCC errata A308 workaround: Step5 (polling IOIRQS) */
489 if (int_stat & INTSTS_IOIRQS)
490 return 1;
491
492 return 0;
493 }
494
495 static u8 scc_udma_filter(ide_drive_t *drive)
496 {
497 ide_hwif_t *hwif = drive->hwif;
498 u8 mask = hwif->ultra_mask;
499
500 /* errata A308 workaround: limit non ide_disk drive to UDMA4 */
501 if ((drive->media != ide_disk) && (mask & 0xE0)) {
502 printk(KERN_INFO "%s: limit %s to UDMA4\n",
503 SCC_PATA_NAME, drive->name);
504 mask = ATA_UDMA4;
505 }
506
507 return mask;
508 }
509
510 /**
511 * setup_mmio_scc - map CTRL/BMID region
512 * @dev: PCI device we are configuring
513 * @name: device name
514 *
515 */
516
517 static int setup_mmio_scc (struct pci_dev *dev, const char *name)
518 {
519 void __iomem *ctl_addr;
520 void __iomem *dma_addr;
521 int i, ret;
522
523 for (i = 0; i < MAX_HWIFS; i++) {
524 if (scc_ports[i].ctl == 0)
525 break;
526 }
527 if (i >= MAX_HWIFS)
528 return -ENOMEM;
529
530 ret = pci_request_selected_regions(dev, (1 << 2) - 1, name);
531 if (ret < 0) {
532 printk(KERN_ERR "%s: can't reserve resources\n", name);
533 return ret;
534 }
535
536 ctl_addr = pci_ioremap_bar(dev, 0);
537 if (!ctl_addr)
538 goto fail_0;
539
540 dma_addr = pci_ioremap_bar(dev, 1);
541 if (!dma_addr)
542 goto fail_1;
543
544 pci_set_master(dev);
545 scc_ports[i].ctl = (unsigned long)ctl_addr;
546 scc_ports[i].dma = (unsigned long)dma_addr;
547 pci_set_drvdata(dev, (void *) &scc_ports[i]);
548
549 return 1;
550
551 fail_1:
552 iounmap(ctl_addr);
553 fail_0:
554 return -ENOMEM;
555 }
556
557 static int scc_ide_setup_pci_device(struct pci_dev *dev,
558 const struct ide_port_info *d)
559 {
560 struct scc_ports *ports = pci_get_drvdata(dev);
561 struct ide_host *host;
562 struct ide_hw hw, *hws[] = { &hw };
563 int i, rc;
564
565 memset(&hw, 0, sizeof(hw));
566 for (i = 0; i <= 8; i++)
567 hw.io_ports_array[i] = ports->dma + 0x20 + i * 4;
568 hw.irq = dev->irq;
569 hw.dev = &dev->dev;
570
571 rc = ide_host_add(d, hws, 1, &host);
572 if (rc)
573 return rc;
574
575 ports->host = host;
576
577 return 0;
578 }
579
580 /**
581 * init_setup_scc - set up an SCC PATA Controller
582 * @dev: PCI device
583 * @d: IDE port info
584 *
585 * Perform the initial set up for this device.
586 */
587
588 static int __devinit init_setup_scc(struct pci_dev *dev,
589 const struct ide_port_info *d)
590 {
591 unsigned long ctl_base;
592 unsigned long dma_base;
593 unsigned long cckctrl_port;
594 unsigned long intmask_port;
595 unsigned long mode_port;
596 unsigned long ecmode_port;
597 u32 reg = 0;
598 struct scc_ports *ports;
599 int rc;
600
601 rc = pci_enable_device(dev);
602 if (rc)
603 goto end;
604
605 rc = setup_mmio_scc(dev, d->name);
606 if (rc < 0)
607 goto end;
608
609 ports = pci_get_drvdata(dev);
610 ctl_base = ports->ctl;
611 dma_base = ports->dma;
612 cckctrl_port = ctl_base + 0xff0;
613 intmask_port = dma_base + 0x010;
614 mode_port = ctl_base + 0x024;
615 ecmode_port = ctl_base + 0xf00;
616
617 /* controller initialization */
618 reg = 0;
619 out_be32((void*)cckctrl_port, reg);
620 reg |= CCKCTRL_ATACLKOEN;
621 out_be32((void*)cckctrl_port, reg);
622 reg |= CCKCTRL_LCLKEN | CCKCTRL_OCLKEN;
623 out_be32((void*)cckctrl_port, reg);
624 reg |= CCKCTRL_CRST;
625 out_be32((void*)cckctrl_port, reg);
626
627 for (;;) {
628 reg = in_be32((void*)cckctrl_port);
629 if (reg & CCKCTRL_CRST)
630 break;
631 udelay(5000);
632 }
633
634 reg |= CCKCTRL_ATARESET;
635 out_be32((void*)cckctrl_port, reg);
636
637 out_be32((void*)ecmode_port, ECMODE_VALUE);
638 out_be32((void*)mode_port, MODE_JCUSFEN);
639 out_be32((void*)intmask_port, INTMASK_MSK);
640
641 rc = scc_ide_setup_pci_device(dev, d);
642
643 end:
644 return rc;
645 }
646
647 static void scc_tf_load(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid)
648 {
649 struct ide_io_ports *io_ports = &drive->hwif->io_ports;
650
651 if (valid & IDE_VALID_FEATURE)
652 scc_ide_outb(tf->feature, io_ports->feature_addr);
653 if (valid & IDE_VALID_NSECT)
654 scc_ide_outb(tf->nsect, io_ports->nsect_addr);
655 if (valid & IDE_VALID_LBAL)
656 scc_ide_outb(tf->lbal, io_ports->lbal_addr);
657 if (valid & IDE_VALID_LBAM)
658 scc_ide_outb(tf->lbam, io_ports->lbam_addr);
659 if (valid & IDE_VALID_LBAH)
660 scc_ide_outb(tf->lbah, io_ports->lbah_addr);
661 if (valid & IDE_VALID_DEVICE)
662 scc_ide_outb(tf->device, io_ports->device_addr);
663 }
664
665 static void scc_tf_read(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid)
666 {
667 struct ide_io_ports *io_ports = &drive->hwif->io_ports;
668
669 if (valid & IDE_VALID_ERROR)
670 tf->error = scc_ide_inb(io_ports->feature_addr);
671 if (valid & IDE_VALID_NSECT)
672 tf->nsect = scc_ide_inb(io_ports->nsect_addr);
673 if (valid & IDE_VALID_LBAL)
674 tf->lbal = scc_ide_inb(io_ports->lbal_addr);
675 if (valid & IDE_VALID_LBAM)
676 tf->lbam = scc_ide_inb(io_ports->lbam_addr);
677 if (valid & IDE_VALID_LBAH)
678 tf->lbah = scc_ide_inb(io_ports->lbah_addr);
679 if (valid & IDE_VALID_DEVICE)
680 tf->device = scc_ide_inb(io_ports->device_addr);
681 }
682
683 static void scc_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
684 void *buf, unsigned int len)
685 {
686 unsigned long data_addr = drive->hwif->io_ports.data_addr;
687
688 len++;
689
690 if (drive->io_32bit) {
691 scc_ide_insl(data_addr, buf, len / 4);
692
693 if ((len & 3) >= 2)
694 scc_ide_insw(data_addr, (u8 *)buf + (len & ~3), 1);
695 } else
696 scc_ide_insw(data_addr, buf, len / 2);
697 }
698
699 static void scc_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
700 void *buf, unsigned int len)
701 {
702 unsigned long data_addr = drive->hwif->io_ports.data_addr;
703
704 len++;
705
706 if (drive->io_32bit) {
707 scc_ide_outsl(data_addr, buf, len / 4);
708
709 if ((len & 3) >= 2)
710 scc_ide_outsw(data_addr, (u8 *)buf + (len & ~3), 1);
711 } else
712 scc_ide_outsw(data_addr, buf, len / 2);
713 }
714
715 /**
716 * init_mmio_iops_scc - set up the iops for MMIO
717 * @hwif: interface to set up
718 *
719 */
720
721 static void __devinit init_mmio_iops_scc(ide_hwif_t *hwif)
722 {
723 struct pci_dev *dev = to_pci_dev(hwif->dev);
724 struct scc_ports *ports = pci_get_drvdata(dev);
725 unsigned long dma_base = ports->dma;
726
727 ide_set_hwifdata(hwif, ports);
728
729 hwif->dma_base = dma_base;
730 hwif->config_data = ports->ctl;
731 }
732
733 /**
734 * init_iops_scc - set up iops
735 * @hwif: interface to set up
736 *
737 * Do the basic setup for the SCC hardware interface
738 * and then do the MMIO setup.
739 */
740
741 static void __devinit init_iops_scc(ide_hwif_t *hwif)
742 {
743 struct pci_dev *dev = to_pci_dev(hwif->dev);
744
745 hwif->hwif_data = NULL;
746 if (pci_get_drvdata(dev) == NULL)
747 return;
748 init_mmio_iops_scc(hwif);
749 }
750
751 static int __devinit scc_init_dma(ide_hwif_t *hwif,
752 const struct ide_port_info *d)
753 {
754 return ide_allocate_dma_engine(hwif);
755 }
756
757 static u8 scc_cable_detect(ide_hwif_t *hwif)
758 {
759 return ATA_CBL_PATA80;
760 }
761
762 /**
763 * init_hwif_scc - set up hwif
764 * @hwif: interface to set up
765 *
766 * We do the basic set up of the interface structure. The SCC
767 * requires several custom handlers so we override the default
768 * ide DMA handlers appropriately.
769 */
770
771 static void __devinit init_hwif_scc(ide_hwif_t *hwif)
772 {
773 /* PTERADD */
774 out_be32((void __iomem *)(hwif->dma_base + 0x018), hwif->dmatable_dma);
775
776 if (in_be32((void __iomem *)(hwif->config_data + 0xff0)) & CCKCTRL_ATACLKOEN)
777 hwif->ultra_mask = ATA_UDMA6; /* 133MHz */
778 else
779 hwif->ultra_mask = ATA_UDMA5; /* 100MHz */
780 }
781
782 static const struct ide_tp_ops scc_tp_ops = {
783 .exec_command = scc_exec_command,
784 .read_status = scc_read_status,
785 .read_altstatus = scc_read_altstatus,
786 .write_devctl = scc_write_devctl,
787
788 .dev_select = ide_dev_select,
789 .tf_load = scc_tf_load,
790 .tf_read = scc_tf_read,
791
792 .input_data = scc_input_data,
793 .output_data = scc_output_data,
794 };
795
796 static const struct ide_port_ops scc_port_ops = {
797 .set_pio_mode = scc_set_pio_mode,
798 .set_dma_mode = scc_set_dma_mode,
799 .udma_filter = scc_udma_filter,
800 .cable_detect = scc_cable_detect,
801 };
802
803 static const struct ide_dma_ops scc_dma_ops = {
804 .dma_host_set = scc_dma_host_set,
805 .dma_setup = scc_dma_setup,
806 .dma_start = scc_dma_start,
807 .dma_end = scc_dma_end,
808 .dma_test_irq = scc_dma_test_irq,
809 .dma_lost_irq = ide_dma_lost_irq,
810 .dma_timer_expiry = ide_dma_sff_timer_expiry,
811 .dma_sff_read_status = scc_dma_sff_read_status,
812 };
813
814 static const struct ide_port_info scc_chipset __devinitdata = {
815 .name = "sccIDE",
816 .init_iops = init_iops_scc,
817 .init_dma = scc_init_dma,
818 .init_hwif = init_hwif_scc,
819 .tp_ops = &scc_tp_ops,
820 .port_ops = &scc_port_ops,
821 .dma_ops = &scc_dma_ops,
822 .host_flags = IDE_HFLAG_SINGLE,
823 .irq_flags = IRQF_SHARED,
824 .pio_mask = ATA_PIO4,
825 .chipset = ide_pci,
826 };
827
828 /**
829 * scc_init_one - pci layer discovery entry
830 * @dev: PCI device
831 * @id: ident table entry
832 *
833 * Called by the PCI code when it finds an SCC PATA controller.
834 * We then use the IDE PCI generic helper to do most of the work.
835 */
836
837 static int __devinit scc_init_one(struct pci_dev *dev, const struct pci_device_id *id)
838 {
839 return init_setup_scc(dev, &scc_chipset);
840 }
841
842 /**
843 * scc_remove - pci layer remove entry
844 * @dev: PCI device
845 *
846 * Called by the PCI code when it removes an SCC PATA controller.
847 */
848
849 static void __devexit scc_remove(struct pci_dev *dev)
850 {
851 struct scc_ports *ports = pci_get_drvdata(dev);
852 struct ide_host *host = ports->host;
853
854 ide_host_remove(host);
855
856 iounmap((void*)ports->dma);
857 iounmap((void*)ports->ctl);
858 pci_release_selected_regions(dev, (1 << 2) - 1);
859 memset(ports, 0, sizeof(*ports));
860 }
861
862 static const struct pci_device_id scc_pci_tbl[] = {
863 { PCI_VDEVICE(TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SCC_ATA), 0 },
864 { 0, },
865 };
866 MODULE_DEVICE_TABLE(pci, scc_pci_tbl);
867
868 static struct pci_driver scc_pci_driver = {
869 .name = "SCC IDE",
870 .id_table = scc_pci_tbl,
871 .probe = scc_init_one,
872 .remove = __devexit_p(scc_remove),
873 };
874
875 static int __init scc_ide_init(void)
876 {
877 return ide_pci_register_driver(&scc_pci_driver);
878 }
879
880 static void __exit scc_ide_exit(void)
881 {
882 pci_unregister_driver(&scc_pci_driver);
883 }
884
885 module_init(scc_ide_init);
886 module_exit(scc_ide_exit);
887
888 MODULE_DESCRIPTION("PCI driver module for Toshiba SCC IDE");
889 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree