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V4L/DVB (11131): cx231xx: avoid trying to access unfilled dev struct
[linux-2.6/verdex.git] / drivers / ata / sata_promise.c
blobb1fd7d62071ab4a8616b9f27fa9c21d8f30c232e
1 /*
2 * sata_promise.c - Promise SATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Mikael Pettersson <mikpe@it.uu.se>
6 * Please ALWAYS copy linux-ide@vger.kernel.org
7 * on emails.
8 *
9 * Copyright 2003-2004 Red Hat, Inc.
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware information only available under NDA.
31 *
32 */
33
34 #include <linux/kernel.h>
35 #include <linux/module.h>
36 #include <linux/pci.h>
37 #include <linux/init.h>
38 #include <linux/blkdev.h>
39 #include <linux/delay.h>
40 #include <linux/interrupt.h>
41 #include <linux/device.h>
42 #include <scsi/scsi.h>
43 #include <scsi/scsi_host.h>
44 #include <scsi/scsi_cmnd.h>
45 #include <linux/libata.h>
46 #include "sata_promise.h"
47
48 #define DRV_NAME "sata_promise"
49 #define DRV_VERSION "2.12"
50
51 enum {
52 PDC_MAX_PORTS = 4,
53 PDC_MMIO_BAR = 3,
54 PDC_MAX_PRD = LIBATA_MAX_PRD - 1, /* -1 for ASIC PRD bug workaround */
55
56 /* host register offsets (from host->iomap[PDC_MMIO_BAR]) */
57 PDC_INT_SEQMASK = 0x40, /* Mask of asserted SEQ INTs */
58 PDC_FLASH_CTL = 0x44, /* Flash control register */
59 PDC_SATA_PLUG_CSR = 0x6C, /* SATA Plug control/status reg */
60 PDC2_SATA_PLUG_CSR = 0x60, /* SATAII Plug control/status reg */
61 PDC_TBG_MODE = 0x41C, /* TBG mode (not SATAII) */
62 PDC_SLEW_CTL = 0x470, /* slew rate control reg (not SATAII) */
63
64 /* per-port ATA register offsets (from ap->ioaddr.cmd_addr) */
65 PDC_FEATURE = 0x04, /* Feature/Error reg (per port) */
66 PDC_SECTOR_COUNT = 0x08, /* Sector count reg (per port) */
67 PDC_SECTOR_NUMBER = 0x0C, /* Sector number reg (per port) */
68 PDC_CYLINDER_LOW = 0x10, /* Cylinder low reg (per port) */
69 PDC_CYLINDER_HIGH = 0x14, /* Cylinder high reg (per port) */
70 PDC_DEVICE = 0x18, /* Device/Head reg (per port) */
71 PDC_COMMAND = 0x1C, /* Command/status reg (per port) */
72 PDC_ALTSTATUS = 0x38, /* Alternate-status/device-control reg (per port) */
73 PDC_PKT_SUBMIT = 0x40, /* Command packet pointer addr */
74 PDC_GLOBAL_CTL = 0x48, /* Global control/status (per port) */
75 PDC_CTLSTAT = 0x60, /* IDE control and status (per port) */
76
77 /* per-port SATA register offsets (from ap->ioaddr.scr_addr) */
78 PDC_PHYMODE4 = 0x14,
79
80 /* PDC_GLOBAL_CTL bit definitions */
81 PDC_PH_ERR = (1 << 8), /* PCI error while loading packet */
82 PDC_SH_ERR = (1 << 9), /* PCI error while loading S/G table */
83 PDC_DH_ERR = (1 << 10), /* PCI error while loading data */
84 PDC2_HTO_ERR = (1 << 12), /* host bus timeout */
85 PDC2_ATA_HBA_ERR = (1 << 13), /* error during SATA DATA FIS transmission */
86 PDC2_ATA_DMA_CNT_ERR = (1 << 14), /* DMA DATA FIS size differs from S/G count */
87 PDC_OVERRUN_ERR = (1 << 19), /* S/G byte count larger than HD requires */
88 PDC_UNDERRUN_ERR = (1 << 20), /* S/G byte count less than HD requires */
89 PDC_DRIVE_ERR = (1 << 21), /* drive error */
90 PDC_PCI_SYS_ERR = (1 << 22), /* PCI system error */
91 PDC1_PCI_PARITY_ERR = (1 << 23), /* PCI parity error (from SATA150 driver) */
92 PDC1_ERR_MASK = PDC1_PCI_PARITY_ERR,
93 PDC2_ERR_MASK = PDC2_HTO_ERR | PDC2_ATA_HBA_ERR |
94 PDC2_ATA_DMA_CNT_ERR,
95 PDC_ERR_MASK = PDC_PH_ERR | PDC_SH_ERR | PDC_DH_ERR |
96 PDC_OVERRUN_ERR | PDC_UNDERRUN_ERR |
97 PDC_DRIVE_ERR | PDC_PCI_SYS_ERR |
98 PDC1_ERR_MASK | PDC2_ERR_MASK,
99
100 board_2037x = 0, /* FastTrak S150 TX2plus */
101 board_2037x_pata = 1, /* FastTrak S150 TX2plus PATA port */
102 board_20319 = 2, /* FastTrak S150 TX4 */
103 board_20619 = 3, /* FastTrak TX4000 */
104 board_2057x = 4, /* SATAII150 Tx2plus */
105 board_2057x_pata = 5, /* SATAII150 Tx2plus PATA port */
106 board_40518 = 6, /* SATAII150 Tx4 */
107
108 PDC_HAS_PATA = (1 << 1), /* PDC20375/20575 has PATA */
109
110 /* Sequence counter control registers bit definitions */
111 PDC_SEQCNTRL_INT_MASK = (1 << 5), /* Sequence Interrupt Mask */
112
113 /* Feature register values */
114 PDC_FEATURE_ATAPI_PIO = 0x00, /* ATAPI data xfer by PIO */
115 PDC_FEATURE_ATAPI_DMA = 0x01, /* ATAPI data xfer by DMA */
116
117 /* Device/Head register values */
118 PDC_DEVICE_SATA = 0xE0, /* Device/Head value for SATA devices */
119
120 /* PDC_CTLSTAT bit definitions */
121 PDC_DMA_ENABLE = (1 << 7),
122 PDC_IRQ_DISABLE = (1 << 10),
123 PDC_RESET = (1 << 11), /* HDMA reset */
124
125 PDC_COMMON_FLAGS = ATA_FLAG_NO_LEGACY |
126 ATA_FLAG_MMIO |
127 ATA_FLAG_PIO_POLLING,
128
129 /* ap->flags bits */
130 PDC_FLAG_GEN_II = (1 << 24),
131 PDC_FLAG_SATA_PATA = (1 << 25), /* supports SATA + PATA */
132 PDC_FLAG_4_PORTS = (1 << 26), /* 4 ports */
133 };
134
135 struct pdc_port_priv {
136 u8 *pkt;
137 dma_addr_t pkt_dma;
138 };
139
140 static int pdc_sata_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
141 static int pdc_sata_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
142 static int pdc_ata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
143 static int pdc_common_port_start(struct ata_port *ap);
144 static int pdc_sata_port_start(struct ata_port *ap);
145 static void pdc_qc_prep(struct ata_queued_cmd *qc);
146 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
147 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
148 static int pdc_check_atapi_dma(struct ata_queued_cmd *qc);
149 static int pdc_old_sata_check_atapi_dma(struct ata_queued_cmd *qc);
150 static void pdc_irq_clear(struct ata_port *ap);
151 static unsigned int pdc_qc_issue(struct ata_queued_cmd *qc);
152 static void pdc_freeze(struct ata_port *ap);
153 static void pdc_sata_freeze(struct ata_port *ap);
154 static void pdc_thaw(struct ata_port *ap);
155 static void pdc_sata_thaw(struct ata_port *ap);
156 static int pdc_pata_softreset(struct ata_link *link, unsigned int *class,
157 unsigned long deadline);
158 static int pdc_sata_hardreset(struct ata_link *link, unsigned int *class,
159 unsigned long deadline);
160 static void pdc_error_handler(struct ata_port *ap);
161 static void pdc_post_internal_cmd(struct ata_queued_cmd *qc);
162 static int pdc_pata_cable_detect(struct ata_port *ap);
163 static int pdc_sata_cable_detect(struct ata_port *ap);
164
165 static struct scsi_host_template pdc_ata_sht = {
166 ATA_BASE_SHT(DRV_NAME),
167 .sg_tablesize = PDC_MAX_PRD,
168 .dma_boundary = ATA_DMA_BOUNDARY,
169 };
170
171 static const struct ata_port_operations pdc_common_ops = {
172 .inherits = &ata_sff_port_ops,
173
174 .sff_tf_load = pdc_tf_load_mmio,
175 .sff_exec_command = pdc_exec_command_mmio,
176 .check_atapi_dma = pdc_check_atapi_dma,
177 .qc_prep = pdc_qc_prep,
178 .qc_issue = pdc_qc_issue,
179
180 .sff_irq_clear = pdc_irq_clear,
181 .lost_interrupt = ATA_OP_NULL,
182
183 .post_internal_cmd = pdc_post_internal_cmd,
184 .error_handler = pdc_error_handler,
185 };
186
187 static struct ata_port_operations pdc_sata_ops = {
188 .inherits = &pdc_common_ops,
189 .cable_detect = pdc_sata_cable_detect,
190 .freeze = pdc_sata_freeze,
191 .thaw = pdc_sata_thaw,
192 .scr_read = pdc_sata_scr_read,
193 .scr_write = pdc_sata_scr_write,
194 .port_start = pdc_sata_port_start,
195 .hardreset = pdc_sata_hardreset,
196 };
197
198 /* First-generation chips need a more restrictive ->check_atapi_dma op */
199 static struct ata_port_operations pdc_old_sata_ops = {
200 .inherits = &pdc_sata_ops,
201 .check_atapi_dma = pdc_old_sata_check_atapi_dma,
202 };
203
204 static struct ata_port_operations pdc_pata_ops = {
205 .inherits = &pdc_common_ops,
206 .cable_detect = pdc_pata_cable_detect,
207 .freeze = pdc_freeze,
208 .thaw = pdc_thaw,
209 .port_start = pdc_common_port_start,
210 .softreset = pdc_pata_softreset,
211 };
212
213 static const struct ata_port_info pdc_port_info[] = {
214 [board_2037x] =
215 {
216 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
217 PDC_FLAG_SATA_PATA,
218 .pio_mask = ATA_PIO4,
219 .mwdma_mask = ATA_MWDMA2,
220 .udma_mask = ATA_UDMA6,
221 .port_ops = &pdc_old_sata_ops,
222 },
223
224 [board_2037x_pata] =
225 {
226 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS,
227 .pio_mask = ATA_PIO4,
228 .mwdma_mask = ATA_MWDMA2,
229 .udma_mask = ATA_UDMA6,
230 .port_ops = &pdc_pata_ops,
231 },
232
233 [board_20319] =
234 {
235 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
236 PDC_FLAG_4_PORTS,
237 .pio_mask = ATA_PIO4,
238 .mwdma_mask = ATA_MWDMA2,
239 .udma_mask = ATA_UDMA6,
240 .port_ops = &pdc_old_sata_ops,
241 },
242
243 [board_20619] =
244 {
245 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS |
246 PDC_FLAG_4_PORTS,
247 .pio_mask = ATA_PIO4,
248 .mwdma_mask = ATA_MWDMA2,
249 .udma_mask = ATA_UDMA6,
250 .port_ops = &pdc_pata_ops,
251 },
252
253 [board_2057x] =
254 {
255 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
256 PDC_FLAG_GEN_II | PDC_FLAG_SATA_PATA,
257 .pio_mask = ATA_PIO4,
258 .mwdma_mask = ATA_MWDMA2,
259 .udma_mask = ATA_UDMA6,
260 .port_ops = &pdc_sata_ops,
261 },
262
263 [board_2057x_pata] =
264 {
265 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS |
266 PDC_FLAG_GEN_II,
267 .pio_mask = ATA_PIO4,
268 .mwdma_mask = ATA_MWDMA2,
269 .udma_mask = ATA_UDMA6,
270 .port_ops = &pdc_pata_ops,
271 },
272
273 [board_40518] =
274 {
275 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
276 PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS,
277 .pio_mask = ATA_PIO4,
278 .mwdma_mask = ATA_MWDMA2,
279 .udma_mask = ATA_UDMA6,
280 .port_ops = &pdc_sata_ops,
281 },
282 };
283
284 static const struct pci_device_id pdc_ata_pci_tbl[] = {
285 { PCI_VDEVICE(PROMISE, 0x3371), board_2037x },
286 { PCI_VDEVICE(PROMISE, 0x3373), board_2037x },
287 { PCI_VDEVICE(PROMISE, 0x3375), board_2037x },
288 { PCI_VDEVICE(PROMISE, 0x3376), board_2037x },
289 { PCI_VDEVICE(PROMISE, 0x3570), board_2057x },
290 { PCI_VDEVICE(PROMISE, 0x3571), board_2057x },
291 { PCI_VDEVICE(PROMISE, 0x3574), board_2057x },
292 { PCI_VDEVICE(PROMISE, 0x3577), board_2057x },
293 { PCI_VDEVICE(PROMISE, 0x3d73), board_2057x },
294 { PCI_VDEVICE(PROMISE, 0x3d75), board_2057x },
295
296 { PCI_VDEVICE(PROMISE, 0x3318), board_20319 },
297 { PCI_VDEVICE(PROMISE, 0x3319), board_20319 },
298 { PCI_VDEVICE(PROMISE, 0x3515), board_40518 },
299 { PCI_VDEVICE(PROMISE, 0x3519), board_40518 },
300 { PCI_VDEVICE(PROMISE, 0x3d17), board_40518 },
301 { PCI_VDEVICE(PROMISE, 0x3d18), board_40518 },
302
303 { PCI_VDEVICE(PROMISE, 0x6629), board_20619 },
304
305 { } /* terminate list */
306 };
307
308 static struct pci_driver pdc_ata_pci_driver = {
309 .name = DRV_NAME,
310 .id_table = pdc_ata_pci_tbl,
311 .probe = pdc_ata_init_one,
312 .remove = ata_pci_remove_one,
313 };
314
315 static int pdc_common_port_start(struct ata_port *ap)
316 {
317 struct device *dev = ap->host->dev;
318 struct pdc_port_priv *pp;
319 int rc;
320
321 rc = ata_port_start(ap);
322 if (rc)
323 return rc;
324
325 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
326 if (!pp)
327 return -ENOMEM;
328
329 pp->pkt = dmam_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
330 if (!pp->pkt)
331 return -ENOMEM;
332
333 ap->private_data = pp;
334
335 return 0;
336 }
337
338 static int pdc_sata_port_start(struct ata_port *ap)
339 {
340 int rc;
341
342 rc = pdc_common_port_start(ap);
343 if (rc)
344 return rc;
345
346 /* fix up PHYMODE4 align timing */
347 if (ap->flags & PDC_FLAG_GEN_II) {
348 void __iomem *sata_mmio = ap->ioaddr.scr_addr;
349 unsigned int tmp;
350
351 tmp = readl(sata_mmio + PDC_PHYMODE4);
352 tmp = (tmp & ~3) | 1; /* set bits 1:0 = 0:1 */
353 writel(tmp, sata_mmio + PDC_PHYMODE4);
354 }
355
356 return 0;
357 }
358
359 static void pdc_reset_port(struct ata_port *ap)
360 {
361 void __iomem *ata_ctlstat_mmio = ap->ioaddr.cmd_addr + PDC_CTLSTAT;
362 unsigned int i;
363 u32 tmp;
364
365 for (i = 11; i > 0; i--) {
366 tmp = readl(ata_ctlstat_mmio);
367 if (tmp & PDC_RESET)
368 break;
369
370 udelay(100);
371
372 tmp |= PDC_RESET;
373 writel(tmp, ata_ctlstat_mmio);
374 }
375
376 tmp &= ~PDC_RESET;
377 writel(tmp, ata_ctlstat_mmio);
378 readl(ata_ctlstat_mmio); /* flush */
379 }
380
381 static int pdc_pata_cable_detect(struct ata_port *ap)
382 {
383 u8 tmp;
384 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
385
386 tmp = readb(ata_mmio + PDC_CTLSTAT + 3);
387 if (tmp & 0x01)
388 return ATA_CBL_PATA40;
389 return ATA_CBL_PATA80;
390 }
391
392 static int pdc_sata_cable_detect(struct ata_port *ap)
393 {
394 return ATA_CBL_SATA;
395 }
396
397 static int pdc_sata_scr_read(struct ata_link *link,
398 unsigned int sc_reg, u32 *val)
399 {
400 if (sc_reg > SCR_CONTROL)
401 return -EINVAL;
402 *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 4));
403 return 0;
404 }
405
406 static int pdc_sata_scr_write(struct ata_link *link,
407 unsigned int sc_reg, u32 val)
408 {
409 if (sc_reg > SCR_CONTROL)
410 return -EINVAL;
411 writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 4));
412 return 0;
413 }
414
415 static void pdc_atapi_pkt(struct ata_queued_cmd *qc)
416 {
417 struct ata_port *ap = qc->ap;
418 dma_addr_t sg_table = ap->prd_dma;
419 unsigned int cdb_len = qc->dev->cdb_len;
420 u8 *cdb = qc->cdb;
421 struct pdc_port_priv *pp = ap->private_data;
422 u8 *buf = pp->pkt;
423 __le32 *buf32 = (__le32 *) buf;
424 unsigned int dev_sel, feature;
425
426 /* set control bits (byte 0), zero delay seq id (byte 3),
427 * and seq id (byte 2)
428 */
429 switch (qc->tf.protocol) {
430 case ATAPI_PROT_DMA:
431 if (!(qc->tf.flags & ATA_TFLAG_WRITE))
432 buf32[0] = cpu_to_le32(PDC_PKT_READ);
433 else
434 buf32[0] = 0;
435 break;
436 case ATAPI_PROT_NODATA:
437 buf32[0] = cpu_to_le32(PDC_PKT_NODATA);
438 break;
439 default:
440 BUG();
441 break;
442 }
443 buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */
444 buf32[2] = 0; /* no next-packet */
445
446 /* select drive */
447 if (sata_scr_valid(&ap->link))
448 dev_sel = PDC_DEVICE_SATA;
449 else
450 dev_sel = qc->tf.device;
451
452 buf[12] = (1 << 5) | ATA_REG_DEVICE;
453 buf[13] = dev_sel;
454 buf[14] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_CLEAR_BSY;
455 buf[15] = dev_sel; /* once more, waiting for BSY to clear */
456
457 buf[16] = (1 << 5) | ATA_REG_NSECT;
458 buf[17] = qc->tf.nsect;
459 buf[18] = (1 << 5) | ATA_REG_LBAL;
460 buf[19] = qc->tf.lbal;
461
462 /* set feature and byte counter registers */
463 if (qc->tf.protocol != ATAPI_PROT_DMA)
464 feature = PDC_FEATURE_ATAPI_PIO;
465 else
466 feature = PDC_FEATURE_ATAPI_DMA;
467
468 buf[20] = (1 << 5) | ATA_REG_FEATURE;
469 buf[21] = feature;
470 buf[22] = (1 << 5) | ATA_REG_BYTEL;
471 buf[23] = qc->tf.lbam;
472 buf[24] = (1 << 5) | ATA_REG_BYTEH;
473 buf[25] = qc->tf.lbah;
474
475 /* send ATAPI packet command 0xA0 */
476 buf[26] = (1 << 5) | ATA_REG_CMD;
477 buf[27] = qc->tf.command;
478
479 /* select drive and check DRQ */
480 buf[28] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_WAIT_DRDY;
481 buf[29] = dev_sel;
482
483 /* we can represent cdb lengths 2/4/6/8/10/12/14/16 */
484 BUG_ON(cdb_len & ~0x1E);
485
486 /* append the CDB as the final part */
487 buf[30] = (((cdb_len >> 1) & 7) << 5) | ATA_REG_DATA | PDC_LAST_REG;
488 memcpy(buf+31, cdb, cdb_len);
489 }
490
491 /**
492 * pdc_fill_sg - Fill PCI IDE PRD table
493 * @qc: Metadata associated with taskfile to be transferred
494 *
495 * Fill PCI IDE PRD (scatter-gather) table with segments
496 * associated with the current disk command.
497 * Make sure hardware does not choke on it.
498 *
499 * LOCKING:
500 * spin_lock_irqsave(host lock)
501 *
502 */
503 static void pdc_fill_sg(struct ata_queued_cmd *qc)
504 {
505 struct ata_port *ap = qc->ap;
506 struct scatterlist *sg;
507 const u32 SG_COUNT_ASIC_BUG = 41*4;
508 unsigned int si, idx;
509 u32 len;
510
511 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
512 return;
513
514 idx = 0;
515 for_each_sg(qc->sg, sg, qc->n_elem, si) {
516 u32 addr, offset;
517 u32 sg_len;
518
519 /* determine if physical DMA addr spans 64K boundary.
520 * Note h/w doesn't support 64-bit, so we unconditionally
521 * truncate dma_addr_t to u32.
522 */
523 addr = (u32) sg_dma_address(sg);
524 sg_len = sg_dma_len(sg);
525
526 while (sg_len) {
527 offset = addr & 0xffff;
528 len = sg_len;
529 if ((offset + sg_len) > 0x10000)
530 len = 0x10000 - offset;
531
532 ap->prd[idx].addr = cpu_to_le32(addr);
533 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
534 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
535
536 idx++;
537 sg_len -= len;
538 addr += len;
539 }
540 }
541
542 len = le32_to_cpu(ap->prd[idx - 1].flags_len);
543
544 if (len > SG_COUNT_ASIC_BUG) {
545 u32 addr;
546
547 VPRINTK("Splitting last PRD.\n");
548
549 addr = le32_to_cpu(ap->prd[idx - 1].addr);
550 ap->prd[idx - 1].flags_len = cpu_to_le32(len - SG_COUNT_ASIC_BUG);
551 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx - 1, addr, SG_COUNT_ASIC_BUG);
552
553 addr = addr + len - SG_COUNT_ASIC_BUG;
554 len = SG_COUNT_ASIC_BUG;
555 ap->prd[idx].addr = cpu_to_le32(addr);
556 ap->prd[idx].flags_len = cpu_to_le32(len);
557 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
558
559 idx++;
560 }
561
562 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
563 }
564
565 static void pdc_qc_prep(struct ata_queued_cmd *qc)
566 {
567 struct pdc_port_priv *pp = qc->ap->private_data;
568 unsigned int i;
569
570 VPRINTK("ENTER\n");
571
572 switch (qc->tf.protocol) {
573 case ATA_PROT_DMA:
574 pdc_fill_sg(qc);
575 /*FALLTHROUGH*/
576 case ATA_PROT_NODATA:
577 i = pdc_pkt_header(&qc->tf, qc->ap->prd_dma,
578 qc->dev->devno, pp->pkt);
579 if (qc->tf.flags & ATA_TFLAG_LBA48)
580 i = pdc_prep_lba48(&qc->tf, pp->pkt, i);
581 else
582 i = pdc_prep_lba28(&qc->tf, pp->pkt, i);
583 pdc_pkt_footer(&qc->tf, pp->pkt, i);
584 break;
585 case ATAPI_PROT_PIO:
586 pdc_fill_sg(qc);
587 break;
588 case ATAPI_PROT_DMA:
589 pdc_fill_sg(qc);
590 /*FALLTHROUGH*/
591 case ATAPI_PROT_NODATA:
592 pdc_atapi_pkt(qc);
593 break;
594 default:
595 break;
596 }
597 }
598
599 static int pdc_is_sataii_tx4(unsigned long flags)
600 {
601 const unsigned long mask = PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS;
602 return (flags & mask) == mask;
603 }
604
605 static unsigned int pdc_port_no_to_ata_no(unsigned int port_no,
606 int is_sataii_tx4)
607 {
608 static const unsigned char sataii_tx4_port_remap[4] = { 3, 1, 0, 2};
609 return is_sataii_tx4 ? sataii_tx4_port_remap[port_no] : port_no;
610 }
611
612 static unsigned int pdc_sata_nr_ports(const struct ata_port *ap)
613 {
614 return (ap->flags & PDC_FLAG_4_PORTS) ? 4 : 2;
615 }
616
617 static unsigned int pdc_sata_ata_port_to_ata_no(const struct ata_port *ap)
618 {
619 const struct ata_host *host = ap->host;
620 unsigned int nr_ports = pdc_sata_nr_ports(ap);
621 unsigned int i;
622
623 for (i = 0; i < nr_ports && host->ports[i] != ap; ++i)
624 ;
625 BUG_ON(i >= nr_ports);
626 return pdc_port_no_to_ata_no(i, pdc_is_sataii_tx4(ap->flags));
627 }
628
629 static unsigned int pdc_sata_hotplug_offset(const struct ata_port *ap)
630 {
631 return (ap->flags & PDC_FLAG_GEN_II) ? PDC2_SATA_PLUG_CSR : PDC_SATA_PLUG_CSR;
632 }
633
634 static void pdc_freeze(struct ata_port *ap)
635 {
636 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
637 u32 tmp;
638
639 tmp = readl(ata_mmio + PDC_CTLSTAT);
640 tmp |= PDC_IRQ_DISABLE;
641 tmp &= ~PDC_DMA_ENABLE;
642 writel(tmp, ata_mmio + PDC_CTLSTAT);
643 readl(ata_mmio + PDC_CTLSTAT); /* flush */
644 }
645
646 static void pdc_sata_freeze(struct ata_port *ap)
647 {
648 struct ata_host *host = ap->host;
649 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
650 unsigned int hotplug_offset = pdc_sata_hotplug_offset(ap);
651 unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap);
652 u32 hotplug_status;
653
654 /* Disable hotplug events on this port.
655 *
656 * Locking:
657 * 1) hotplug register accesses must be serialised via host->lock
658 * 2) ap->lock == &ap->host->lock
659 * 3) ->freeze() and ->thaw() are called with ap->lock held
660 */
661 hotplug_status = readl(host_mmio + hotplug_offset);
662 hotplug_status |= 0x11 << (ata_no + 16);
663 writel(hotplug_status, host_mmio + hotplug_offset);
664 readl(host_mmio + hotplug_offset); /* flush */
665
666 pdc_freeze(ap);
667 }
668
669 static void pdc_thaw(struct ata_port *ap)
670 {
671 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
672 u32 tmp;
673
674 /* clear IRQ */
675 readl(ata_mmio + PDC_COMMAND);
676
677 /* turn IRQ back on */
678 tmp = readl(ata_mmio + PDC_CTLSTAT);
679 tmp &= ~PDC_IRQ_DISABLE;
680 writel(tmp, ata_mmio + PDC_CTLSTAT);
681 readl(ata_mmio + PDC_CTLSTAT); /* flush */
682 }
683
684 static void pdc_sata_thaw(struct ata_port *ap)
685 {
686 struct ata_host *host = ap->host;
687 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
688 unsigned int hotplug_offset = pdc_sata_hotplug_offset(ap);
689 unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap);
690 u32 hotplug_status;
691
692 pdc_thaw(ap);
693
694 /* Enable hotplug events on this port.
695 * Locking: see pdc_sata_freeze().
696 */
697 hotplug_status = readl(host_mmio + hotplug_offset);
698 hotplug_status |= 0x11 << ata_no;
699 hotplug_status &= ~(0x11 << (ata_no + 16));
700 writel(hotplug_status, host_mmio + hotplug_offset);
701 readl(host_mmio + hotplug_offset); /* flush */
702 }
703
704 static int pdc_pata_softreset(struct ata_link *link, unsigned int *class,
705 unsigned long deadline)
706 {
707 pdc_reset_port(link->ap);
708 return ata_sff_softreset(link, class, deadline);
709 }
710
711 static int pdc_sata_hardreset(struct ata_link *link, unsigned int *class,
712 unsigned long deadline)
713 {
714 pdc_reset_port(link->ap);
715 return sata_sff_hardreset(link, class, deadline);
716 }
717
718 static void pdc_error_handler(struct ata_port *ap)
719 {
720 if (!(ap->pflags & ATA_PFLAG_FROZEN))
721 pdc_reset_port(ap);
722
723 ata_std_error_handler(ap);
724 }
725
726 static void pdc_post_internal_cmd(struct ata_queued_cmd *qc)
727 {
728 struct ata_port *ap = qc->ap;
729
730 /* make DMA engine forget about the failed command */
731 if (qc->flags & ATA_QCFLAG_FAILED)
732 pdc_reset_port(ap);
733 }
734
735 static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc,
736 u32 port_status, u32 err_mask)
737 {
738 struct ata_eh_info *ehi = &ap->link.eh_info;
739 unsigned int ac_err_mask = 0;
740
741 ata_ehi_clear_desc(ehi);
742 ata_ehi_push_desc(ehi, "port_status 0x%08x", port_status);
743 port_status &= err_mask;
744
745 if (port_status & PDC_DRIVE_ERR)
746 ac_err_mask |= AC_ERR_DEV;
747 if (port_status & (PDC_OVERRUN_ERR | PDC_UNDERRUN_ERR))
748 ac_err_mask |= AC_ERR_HSM;
749 if (port_status & (PDC2_ATA_HBA_ERR | PDC2_ATA_DMA_CNT_ERR))
750 ac_err_mask |= AC_ERR_ATA_BUS;
751 if (port_status & (PDC_PH_ERR | PDC_SH_ERR | PDC_DH_ERR | PDC2_HTO_ERR
752 | PDC_PCI_SYS_ERR | PDC1_PCI_PARITY_ERR))
753 ac_err_mask |= AC_ERR_HOST_BUS;
754
755 if (sata_scr_valid(&ap->link)) {
756 u32 serror;
757
758 pdc_sata_scr_read(&ap->link, SCR_ERROR, &serror);
759 ehi->serror |= serror;
760 }
761
762 qc->err_mask |= ac_err_mask;
763
764 pdc_reset_port(ap);
765
766 ata_port_abort(ap);
767 }
768
769 static unsigned int pdc_host_intr(struct ata_port *ap,
770 struct ata_queued_cmd *qc)
771 {
772 unsigned int handled = 0;
773 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
774 u32 port_status, err_mask;
775
776 err_mask = PDC_ERR_MASK;
777 if (ap->flags & PDC_FLAG_GEN_II)
778 err_mask &= ~PDC1_ERR_MASK;
779 else
780 err_mask &= ~PDC2_ERR_MASK;
781 port_status = readl(ata_mmio + PDC_GLOBAL_CTL);
782 if (unlikely(port_status & err_mask)) {
783 pdc_error_intr(ap, qc, port_status, err_mask);
784 return 1;
785 }
786
787 switch (qc->tf.protocol) {
788 case ATA_PROT_DMA:
789 case ATA_PROT_NODATA:
790 case ATAPI_PROT_DMA:
791 case ATAPI_PROT_NODATA:
792 qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
793 ata_qc_complete(qc);
794 handled = 1;
795 break;
796 default:
797 ap->stats.idle_irq++;
798 break;
799 }
800
801 return handled;
802 }
803
804 static void pdc_irq_clear(struct ata_port *ap)
805 {
806 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
807
808 readl(ata_mmio + PDC_COMMAND);
809 }
810
811 static irqreturn_t pdc_interrupt(int irq, void *dev_instance)
812 {
813 struct ata_host *host = dev_instance;
814 struct ata_port *ap;
815 u32 mask = 0;
816 unsigned int i, tmp;
817 unsigned int handled = 0;
818 void __iomem *host_mmio;
819 unsigned int hotplug_offset, ata_no;
820 u32 hotplug_status;
821 int is_sataii_tx4;
822
823 VPRINTK("ENTER\n");
824
825 if (!host || !host->iomap[PDC_MMIO_BAR]) {
826 VPRINTK("QUICK EXIT\n");
827 return IRQ_NONE;
828 }
829
830 host_mmio = host->iomap[PDC_MMIO_BAR];
831
832 spin_lock(&host->lock);
833
834 /* read and clear hotplug flags for all ports */
835 if (host->ports[0]->flags & PDC_FLAG_GEN_II)
836 hotplug_offset = PDC2_SATA_PLUG_CSR;
837 else
838 hotplug_offset = PDC_SATA_PLUG_CSR;
839 hotplug_status = readl(host_mmio + hotplug_offset);
840 if (hotplug_status & 0xff)
841 writel(hotplug_status | 0xff, host_mmio + hotplug_offset);
842 hotplug_status &= 0xff; /* clear uninteresting bits */
843
844 /* reading should also clear interrupts */
845 mask = readl(host_mmio + PDC_INT_SEQMASK);
846
847 if (mask == 0xffffffff && hotplug_status == 0) {
848 VPRINTK("QUICK EXIT 2\n");
849 goto done_irq;
850 }
851
852 mask &= 0xffff; /* only 16 SEQIDs possible */
853 if (mask == 0 && hotplug_status == 0) {
854 VPRINTK("QUICK EXIT 3\n");
855 goto done_irq;
856 }
857
858 writel(mask, host_mmio + PDC_INT_SEQMASK);
859
860 is_sataii_tx4 = pdc_is_sataii_tx4(host->ports[0]->flags);
861
862 for (i = 0; i < host->n_ports; i++) {
863 VPRINTK("port %u\n", i);
864 ap = host->ports[i];
865
866 /* check for a plug or unplug event */
867 ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
868 tmp = hotplug_status & (0x11 << ata_no);
869 if (tmp && ap &&
870 !(ap->flags & ATA_FLAG_DISABLED)) {
871 struct ata_eh_info *ehi = &ap->link.eh_info;
872 ata_ehi_clear_desc(ehi);
873 ata_ehi_hotplugged(ehi);
874 ata_ehi_push_desc(ehi, "hotplug_status %#x", tmp);
875 ata_port_freeze(ap);
876 ++handled;
877 continue;
878 }
879
880 /* check for a packet interrupt */
881 tmp = mask & (1 << (i + 1));
882 if (tmp && ap &&
883 !(ap->flags & ATA_FLAG_DISABLED)) {
884 struct ata_queued_cmd *qc;
885
886 qc = ata_qc_from_tag(ap, ap->link.active_tag);
887 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
888 handled += pdc_host_intr(ap, qc);
889 }
890 }
891
892 VPRINTK("EXIT\n");
893
894 done_irq:
895 spin_unlock(&host->lock);
896 return IRQ_RETVAL(handled);
897 }
898
899 static void pdc_packet_start(struct ata_queued_cmd *qc)
900 {
901 struct ata_port *ap = qc->ap;
902 struct pdc_port_priv *pp = ap->private_data;
903 void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR];
904 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
905 unsigned int port_no = ap->port_no;
906 u8 seq = (u8) (port_no + 1);
907
908 VPRINTK("ENTER, ap %p\n", ap);
909
910 writel(0x00000001, host_mmio + (seq * 4));
911 readl(host_mmio + (seq * 4)); /* flush */
912
913 pp->pkt[2] = seq;
914 wmb(); /* flush PRD, pkt writes */
915 writel(pp->pkt_dma, ata_mmio + PDC_PKT_SUBMIT);
916 readl(ata_mmio + PDC_PKT_SUBMIT); /* flush */
917 }
918
919 static unsigned int pdc_qc_issue(struct ata_queued_cmd *qc)
920 {
921 switch (qc->tf.protocol) {
922 case ATAPI_PROT_NODATA:
923 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
924 break;
925 /*FALLTHROUGH*/
926 case ATA_PROT_NODATA:
927 if (qc->tf.flags & ATA_TFLAG_POLLING)
928 break;
929 /*FALLTHROUGH*/
930 case ATAPI_PROT_DMA:
931 case ATA_PROT_DMA:
932 pdc_packet_start(qc);
933 return 0;
934 default:
935 break;
936 }
937 return ata_sff_qc_issue(qc);
938 }
939
940 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
941 {
942 WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA);
943 ata_sff_tf_load(ap, tf);
944 }
945
946 static void pdc_exec_command_mmio(struct ata_port *ap,
947 const struct ata_taskfile *tf)
948 {
949 WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA);
950 ata_sff_exec_command(ap, tf);
951 }
952
953 static int pdc_check_atapi_dma(struct ata_queued_cmd *qc)
954 {
955 u8 *scsicmd = qc->scsicmd->cmnd;
956 int pio = 1; /* atapi dma off by default */
957
958 /* Whitelist commands that may use DMA. */
959 switch (scsicmd[0]) {
960 case WRITE_12:
961 case WRITE_10:
962 case WRITE_6:
963 case READ_12:
964 case READ_10:
965 case READ_6:
966 case 0xad: /* READ_DVD_STRUCTURE */
967 case 0xbe: /* READ_CD */
968 pio = 0;
969 }
970 /* -45150 (FFFF4FA2) to -1 (FFFFFFFF) shall use PIO mode */
971 if (scsicmd[0] == WRITE_10) {
972 unsigned int lba =
973 (scsicmd[2] << 24) |
974 (scsicmd[3] << 16) |
975 (scsicmd[4] << 8) |
976 scsicmd[5];
977 if (lba >= 0xFFFF4FA2)
978 pio = 1;
979 }
980 return pio;
981 }
982
983 static int pdc_old_sata_check_atapi_dma(struct ata_queued_cmd *qc)
984 {
985 /* First generation chips cannot use ATAPI DMA on SATA ports */
986 return 1;
987 }
988
989 static void pdc_ata_setup_port(struct ata_port *ap,
990 void __iomem *base, void __iomem *scr_addr)
991 {
992 ap->ioaddr.cmd_addr = base;
993 ap->ioaddr.data_addr = base;
994 ap->ioaddr.feature_addr =
995 ap->ioaddr.error_addr = base + 0x4;
996 ap->ioaddr.nsect_addr = base + 0x8;
997 ap->ioaddr.lbal_addr = base + 0xc;
998 ap->ioaddr.lbam_addr = base + 0x10;
999 ap->ioaddr.lbah_addr = base + 0x14;
1000 ap->ioaddr.device_addr = base + 0x18;
1001 ap->ioaddr.command_addr =
1002 ap->ioaddr.status_addr = base + 0x1c;
1003 ap->ioaddr.altstatus_addr =
1004 ap->ioaddr.ctl_addr = base + 0x38;
1005 ap->ioaddr.scr_addr = scr_addr;
1006 }
1007
1008 static void pdc_host_init(struct ata_host *host)
1009 {
1010 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
1011 int is_gen2 = host->ports[0]->flags & PDC_FLAG_GEN_II;
1012 int hotplug_offset;
1013 u32 tmp;
1014
1015 if (is_gen2)
1016 hotplug_offset = PDC2_SATA_PLUG_CSR;
1017 else
1018 hotplug_offset = PDC_SATA_PLUG_CSR;
1019
1020 /*
1021 * Except for the hotplug stuff, this is voodoo from the
1022 * Promise driver. Label this entire section
1023 * "TODO: figure out why we do this"
1024 */
1025
1026 /* enable BMR_BURST, maybe change FIFO_SHD to 8 dwords */
1027 tmp = readl(host_mmio + PDC_FLASH_CTL);
1028 tmp |= 0x02000; /* bit 13 (enable bmr burst) */
1029 if (!is_gen2)
1030 tmp |= 0x10000; /* bit 16 (fifo threshold at 8 dw) */
1031 writel(tmp, host_mmio + PDC_FLASH_CTL);
1032
1033 /* clear plug/unplug flags for all ports */
1034 tmp = readl(host_mmio + hotplug_offset);
1035 writel(tmp | 0xff, host_mmio + hotplug_offset);
1036
1037 /* unmask plug/unplug ints */
1038 tmp = readl(host_mmio + hotplug_offset);
1039 writel(tmp & ~0xff0000, host_mmio + hotplug_offset);
1040
1041 /* don't initialise TBG or SLEW on 2nd generation chips */
1042 if (is_gen2)
1043 return;
1044
1045 /* reduce TBG clock to 133 Mhz. */
1046 tmp = readl(host_mmio + PDC_TBG_MODE);
1047 tmp &= ~0x30000; /* clear bit 17, 16*/
1048 tmp |= 0x10000; /* set bit 17:16 = 0:1 */
1049 writel(tmp, host_mmio + PDC_TBG_MODE);
1050
1051 readl(host_mmio + PDC_TBG_MODE); /* flush */
1052 msleep(10);
1053
1054 /* adjust slew rate control register. */
1055 tmp = readl(host_mmio + PDC_SLEW_CTL);
1056 tmp &= 0xFFFFF03F; /* clear bit 11 ~ 6 */
1057 tmp |= 0x00000900; /* set bit 11-9 = 100b , bit 8-6 = 100 */
1058 writel(tmp, host_mmio + PDC_SLEW_CTL);
1059 }
1060
1061 static int pdc_ata_init_one(struct pci_dev *pdev,
1062 const struct pci_device_id *ent)
1063 {
1064 static int printed_version;
1065 const struct ata_port_info *pi = &pdc_port_info[ent->driver_data];
1066 const struct ata_port_info *ppi[PDC_MAX_PORTS];
1067 struct ata_host *host;
1068 void __iomem *host_mmio;
1069 int n_ports, i, rc;
1070 int is_sataii_tx4;
1071
1072 if (!printed_version++)
1073 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1074
1075 /* enable and acquire resources */
1076 rc = pcim_enable_device(pdev);
1077 if (rc)
1078 return rc;
1079
1080 rc = pcim_iomap_regions(pdev, 1 << PDC_MMIO_BAR, DRV_NAME);
1081 if (rc == -EBUSY)
1082 pcim_pin_device(pdev);
1083 if (rc)
1084 return rc;
1085 host_mmio = pcim_iomap_table(pdev)[PDC_MMIO_BAR];
1086
1087 /* determine port configuration and setup host */
1088 n_ports = 2;
1089 if (pi->flags & PDC_FLAG_4_PORTS)
1090 n_ports = 4;
1091 for (i = 0; i < n_ports; i++)
1092 ppi[i] = pi;
1093
1094 if (pi->flags & PDC_FLAG_SATA_PATA) {
1095 u8 tmp = readb(host_mmio + PDC_FLASH_CTL + 1);
1096 if (!(tmp & 0x80))
1097 ppi[n_ports++] = pi + 1;
1098 }
1099
1100 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
1101 if (!host) {
1102 dev_printk(KERN_ERR, &pdev->dev, "failed to allocate host\n");
1103 return -ENOMEM;
1104 }
1105 host->iomap = pcim_iomap_table(pdev);
1106
1107 is_sataii_tx4 = pdc_is_sataii_tx4(pi->flags);
1108 for (i = 0; i < host->n_ports; i++) {
1109 struct ata_port *ap = host->ports[i];
1110 unsigned int ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
1111 unsigned int ata_offset = 0x200 + ata_no * 0x80;
1112 unsigned int scr_offset = 0x400 + ata_no * 0x100;
1113
1114 pdc_ata_setup_port(ap, host_mmio + ata_offset, host_mmio + scr_offset);
1115
1116 ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");
1117 ata_port_pbar_desc(ap, PDC_MMIO_BAR, ata_offset, "ata");
1118 }
1119
1120 /* initialize adapter */
1121 pdc_host_init(host);
1122
1123 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
1124 if (rc)
1125 return rc;
1126 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
1127 if (rc)
1128 return rc;
1129
1130 /* start host, request IRQ and attach */
1131 pci_set_master(pdev);
1132 return ata_host_activate(host, pdev->irq, pdc_interrupt, IRQF_SHARED,
1133 &pdc_ata_sht);
1134 }
1135
1136 static int __init pdc_ata_init(void)
1137 {
1138 return pci_register_driver(&pdc_ata_pci_driver);
1139 }
1140
1141 static void __exit pdc_ata_exit(void)
1142 {
1143 pci_unregister_driver(&pdc_ata_pci_driver);
1144 }
1145
1146 MODULE_AUTHOR("Jeff Garzik");
1147 MODULE_DESCRIPTION("Promise ATA TX2/TX4/TX4000 low-level driver");
1148 MODULE_LICENSE("GPL");
1149 MODULE_DEVICE_TABLE(pci, pdc_ata_pci_tbl);
1150 MODULE_VERSION(DRV_VERSION);
1151
1152 module_init(pdc_ata_init);
1153 module_exit(pdc_ata_exit);
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