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[deliverable/linux.git] / drivers / scsi / sata_qstor.c
1 /*
2 * sata_qstor.c - Pacific Digital Corporation QStor SATA
3 *
4 * Maintained by: Mark Lord <mlord@pobox.com>
5 *
6 * Copyright 2005 Pacific Digital Corporation.
7 * (OSL/GPL code release authorized by Jalil Fadavi).
8 *
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, or (at your option)
13 * 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
21 * along with this program; see the file COPYING. If not, write to
22 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23 *
24 *
25 * libata documentation is available via 'make {ps|pdf}docs',
26 * as Documentation/DocBook/libata.*
27 *
28 */
29
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/pci.h>
33 #include <linux/init.h>
34 #include <linux/blkdev.h>
35 #include <linux/delay.h>
36 #include <linux/interrupt.h>
37 #include <linux/sched.h>
38 #include "scsi.h"
39 #include <scsi/scsi_host.h>
40 #include <asm/io.h>
41 #include <linux/libata.h>
42
43 #define DRV_NAME "sata_qstor"
44 #define DRV_VERSION "0.04"
45
46 enum {
47 QS_PORTS = 4,
48 QS_MAX_PRD = LIBATA_MAX_PRD,
49 QS_CPB_ORDER = 6,
50 QS_CPB_BYTES = (1 << QS_CPB_ORDER),
51 QS_PRD_BYTES = QS_MAX_PRD * 16,
52 QS_PKT_BYTES = QS_CPB_BYTES + QS_PRD_BYTES,
53
54 QS_DMA_BOUNDARY = ~0UL,
55
56 /* global register offsets */
57 QS_HCF_CNFG3 = 0x0003, /* host configuration offset */
58 QS_HID_HPHY = 0x0004, /* host physical interface info */
59 QS_HCT_CTRL = 0x00e4, /* global interrupt mask offset */
60 QS_HST_SFF = 0x0100, /* host status fifo offset */
61 QS_HVS_SERD3 = 0x0393, /* PHY enable offset */
62
63 /* global control bits */
64 QS_HPHY_64BIT = (1 << 1), /* 64-bit bus detected */
65 QS_CNFG3_GSRST = 0x01, /* global chip reset */
66 QS_SERD3_PHY_ENA = 0xf0, /* PHY detection ENAble*/
67
68 /* per-channel register offsets */
69 QS_CCF_CPBA = 0x0710, /* chan CPB base address */
70 QS_CCF_CSEP = 0x0718, /* chan CPB separation factor */
71 QS_CFC_HUFT = 0x0800, /* host upstream fifo threshold */
72 QS_CFC_HDFT = 0x0804, /* host downstream fifo threshold */
73 QS_CFC_DUFT = 0x0808, /* dev upstream fifo threshold */
74 QS_CFC_DDFT = 0x080c, /* dev downstream fifo threshold */
75 QS_CCT_CTR0 = 0x0900, /* chan control-0 offset */
76 QS_CCT_CTR1 = 0x0901, /* chan control-1 offset */
77 QS_CCT_CFF = 0x0a00, /* chan command fifo offset */
78
79 /* channel control bits */
80 QS_CTR0_REG = (1 << 1), /* register mode (vs. pkt mode) */
81 QS_CTR0_CLER = (1 << 2), /* clear channel errors */
82 QS_CTR1_RDEV = (1 << 1), /* sata phy/comms reset */
83 QS_CTR1_RCHN = (1 << 4), /* reset channel logic */
84 QS_CCF_RUN_PKT = 0x107, /* RUN a new dma PKT */
85
86 /* pkt sub-field headers */
87 QS_HCB_HDR = 0x01, /* Host Control Block header */
88 QS_DCB_HDR = 0x02, /* Device Control Block header */
89
90 /* pkt HCB flag bits */
91 QS_HF_DIRO = (1 << 0), /* data DIRection Out */
92 QS_HF_DAT = (1 << 3), /* DATa pkt */
93 QS_HF_IEN = (1 << 4), /* Interrupt ENable */
94 QS_HF_VLD = (1 << 5), /* VaLiD pkt */
95
96 /* pkt DCB flag bits */
97 QS_DF_PORD = (1 << 2), /* Pio OR Dma */
98 QS_DF_ELBA = (1 << 3), /* Extended LBA (lba48) */
99
100 /* PCI device IDs */
101 board_2068_idx = 0, /* QStor 4-port SATA/RAID */
102 };
103
104 typedef enum { qs_state_idle, qs_state_pkt, qs_state_mmio } qs_state_t;
105
106 struct qs_port_priv {
107 u8 *pkt;
108 dma_addr_t pkt_dma;
109 qs_state_t state;
110 };
111
112 static u32 qs_scr_read (struct ata_port *ap, unsigned int sc_reg);
113 static void qs_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
114 static int qs_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
115 static irqreturn_t qs_intr (int irq, void *dev_instance, struct pt_regs *regs);
116 static int qs_port_start(struct ata_port *ap);
117 static void qs_host_stop(struct ata_host_set *host_set);
118 static void qs_port_stop(struct ata_port *ap);
119 static void qs_phy_reset(struct ata_port *ap);
120 static void qs_qc_prep(struct ata_queued_cmd *qc);
121 static int qs_qc_issue(struct ata_queued_cmd *qc);
122 static int qs_check_atapi_dma(struct ata_queued_cmd *qc);
123 static void qs_bmdma_stop(struct ata_queued_cmd *qc);
124 static u8 qs_bmdma_status(struct ata_port *ap);
125 static void qs_irq_clear(struct ata_port *ap);
126 static void qs_eng_timeout(struct ata_port *ap);
127
128 static Scsi_Host_Template qs_ata_sht = {
129 .module = THIS_MODULE,
130 .name = DRV_NAME,
131 .ioctl = ata_scsi_ioctl,
132 .queuecommand = ata_scsi_queuecmd,
133 .eh_strategy_handler = ata_scsi_error,
134 .can_queue = ATA_DEF_QUEUE,
135 .this_id = ATA_SHT_THIS_ID,
136 .sg_tablesize = QS_MAX_PRD,
137 .max_sectors = ATA_MAX_SECTORS,
138 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
139 .emulated = ATA_SHT_EMULATED,
140 //FIXME .use_clustering = ATA_SHT_USE_CLUSTERING,
141 .use_clustering = ENABLE_CLUSTERING,
142 .proc_name = DRV_NAME,
143 .dma_boundary = QS_DMA_BOUNDARY,
144 .slave_configure = ata_scsi_slave_config,
145 .bios_param = ata_std_bios_param,
146 };
147
148 static struct ata_port_operations qs_ata_ops = {
149 .port_disable = ata_port_disable,
150 .tf_load = ata_tf_load,
151 .tf_read = ata_tf_read,
152 .check_status = ata_check_status,
153 .check_atapi_dma = qs_check_atapi_dma,
154 .exec_command = ata_exec_command,
155 .dev_select = ata_std_dev_select,
156 .phy_reset = qs_phy_reset,
157 .qc_prep = qs_qc_prep,
158 .qc_issue = qs_qc_issue,
159 .eng_timeout = qs_eng_timeout,
160 .irq_handler = qs_intr,
161 .irq_clear = qs_irq_clear,
162 .scr_read = qs_scr_read,
163 .scr_write = qs_scr_write,
164 .port_start = qs_port_start,
165 .port_stop = qs_port_stop,
166 .host_stop = qs_host_stop,
167 .bmdma_stop = qs_bmdma_stop,
168 .bmdma_status = qs_bmdma_status,
169 };
170
171 static struct ata_port_info qs_port_info[] = {
172 /* board_2068_idx */
173 {
174 .sht = &qs_ata_sht,
175 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
176 ATA_FLAG_SATA_RESET |
177 //FIXME ATA_FLAG_SRST |
178 ATA_FLAG_MMIO,
179 .pio_mask = 0x10, /* pio4 */
180 .udma_mask = 0x7f, /* udma0-6 */
181 .port_ops = &qs_ata_ops,
182 },
183 };
184
185 static struct pci_device_id qs_ata_pci_tbl[] = {
186 { PCI_VENDOR_ID_PDC, 0x2068, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
187 board_2068_idx },
188
189 { } /* terminate list */
190 };
191
192 static struct pci_driver qs_ata_pci_driver = {
193 .name = DRV_NAME,
194 .id_table = qs_ata_pci_tbl,
195 .probe = qs_ata_init_one,
196 .remove = ata_pci_remove_one,
197 };
198
199 static int qs_check_atapi_dma(struct ata_queued_cmd *qc)
200 {
201 return 1; /* ATAPI DMA not supported */
202 }
203
204 static void qs_bmdma_stop(struct ata_queued_cmd *qc)
205 {
206 /* nothing */
207 }
208
209 static u8 qs_bmdma_status(struct ata_port *ap)
210 {
211 return 0;
212 }
213
214 static void qs_irq_clear(struct ata_port *ap)
215 {
216 /* nothing */
217 }
218
219 static inline void qs_enter_reg_mode(struct ata_port *ap)
220 {
221 u8 __iomem *chan = ap->host_set->mmio_base + (ap->port_no * 0x4000);
222
223 writeb(QS_CTR0_REG, chan + QS_CCT_CTR0);
224 readb(chan + QS_CCT_CTR0); /* flush */
225 }
226
227 static inline void qs_reset_channel_logic(struct ata_port *ap)
228 {
229 u8 __iomem *chan = ap->host_set->mmio_base + (ap->port_no * 0x4000);
230
231 writeb(QS_CTR1_RCHN, chan + QS_CCT_CTR1);
232 readb(chan + QS_CCT_CTR0); /* flush */
233 qs_enter_reg_mode(ap);
234 }
235
236 static void qs_phy_reset(struct ata_port *ap)
237 {
238 struct qs_port_priv *pp = ap->private_data;
239
240 pp->state = qs_state_idle;
241 qs_reset_channel_logic(ap);
242 sata_phy_reset(ap);
243 }
244
245 static void qs_eng_timeout(struct ata_port *ap)
246 {
247 struct qs_port_priv *pp = ap->private_data;
248
249 if (pp->state != qs_state_idle) /* healthy paranoia */
250 pp->state = qs_state_mmio;
251 qs_reset_channel_logic(ap);
252 ata_eng_timeout(ap);
253 }
254
255 static u32 qs_scr_read (struct ata_port *ap, unsigned int sc_reg)
256 {
257 if (sc_reg > SCR_CONTROL)
258 return ~0U;
259 return readl((void __iomem *)(ap->ioaddr.scr_addr + (sc_reg * 8)));
260 }
261
262 static void qs_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
263 {
264 if (sc_reg > SCR_CONTROL)
265 return;
266 writel(val, (void __iomem *)(ap->ioaddr.scr_addr + (sc_reg * 8)));
267 }
268
269 static void qs_fill_sg(struct ata_queued_cmd *qc)
270 {
271 struct scatterlist *sg = qc->sg;
272 struct ata_port *ap = qc->ap;
273 struct qs_port_priv *pp = ap->private_data;
274 unsigned int nelem;
275 u8 *prd = pp->pkt + QS_CPB_BYTES;
276
277 assert(sg != NULL);
278 assert(qc->n_elem > 0);
279
280 for (nelem = 0; nelem < qc->n_elem; nelem++,sg++) {
281 u64 addr;
282 u32 len;
283
284 addr = sg_dma_address(sg);
285 *(__le64 *)prd = cpu_to_le64(addr);
286 prd += sizeof(u64);
287
288 len = sg_dma_len(sg);
289 *(__le32 *)prd = cpu_to_le32(len);
290 prd += sizeof(u64);
291
292 VPRINTK("PRD[%u] = (0x%llX, 0x%X)\n", nelem,
293 (unsigned long long)addr, len);
294 }
295 }
296
297 static void qs_qc_prep(struct ata_queued_cmd *qc)
298 {
299 struct qs_port_priv *pp = qc->ap->private_data;
300 u8 dflags = QS_DF_PORD, *buf = pp->pkt;
301 u8 hflags = QS_HF_DAT | QS_HF_IEN | QS_HF_VLD;
302 u64 addr;
303
304 VPRINTK("ENTER\n");
305
306 qs_enter_reg_mode(qc->ap);
307 if (qc->tf.protocol != ATA_PROT_DMA) {
308 ata_qc_prep(qc);
309 return;
310 }
311
312 qs_fill_sg(qc);
313
314 if ((qc->tf.flags & ATA_TFLAG_WRITE))
315 hflags |= QS_HF_DIRO;
316 if ((qc->tf.flags & ATA_TFLAG_LBA48))
317 dflags |= QS_DF_ELBA;
318
319 /* host control block (HCB) */
320 buf[ 0] = QS_HCB_HDR;
321 buf[ 1] = hflags;
322 *(__le32 *)(&buf[ 4]) = cpu_to_le32(qc->nsect * ATA_SECT_SIZE);
323 *(__le32 *)(&buf[ 8]) = cpu_to_le32(qc->n_elem);
324 addr = ((u64)pp->pkt_dma) + QS_CPB_BYTES;
325 *(__le64 *)(&buf[16]) = cpu_to_le64(addr);
326
327 /* device control block (DCB) */
328 buf[24] = QS_DCB_HDR;
329 buf[28] = dflags;
330
331 /* frame information structure (FIS) */
332 ata_tf_to_fis(&qc->tf, &buf[32], 0);
333 }
334
335 static inline void qs_packet_start(struct ata_queued_cmd *qc)
336 {
337 struct ata_port *ap = qc->ap;
338 u8 __iomem *chan = ap->host_set->mmio_base + (ap->port_no * 0x4000);
339
340 VPRINTK("ENTER, ap %p\n", ap);
341
342 writeb(QS_CTR0_CLER, chan + QS_CCT_CTR0);
343 wmb(); /* flush PRDs and pkt to memory */
344 writel(QS_CCF_RUN_PKT, chan + QS_CCT_CFF);
345 readl(chan + QS_CCT_CFF); /* flush */
346 }
347
348 static int qs_qc_issue(struct ata_queued_cmd *qc)
349 {
350 struct qs_port_priv *pp = qc->ap->private_data;
351
352 switch (qc->tf.protocol) {
353 case ATA_PROT_DMA:
354
355 pp->state = qs_state_pkt;
356 qs_packet_start(qc);
357 return 0;
358
359 case ATA_PROT_ATAPI_DMA:
360 BUG();
361 break;
362
363 default:
364 break;
365 }
366
367 pp->state = qs_state_mmio;
368 return ata_qc_issue_prot(qc);
369 }
370
371 static inline unsigned int qs_intr_pkt(struct ata_host_set *host_set)
372 {
373 unsigned int handled = 0;
374 u8 sFFE;
375 u8 __iomem *mmio_base = host_set->mmio_base;
376
377 do {
378 u32 sff0 = readl(mmio_base + QS_HST_SFF);
379 u32 sff1 = readl(mmio_base + QS_HST_SFF + 4);
380 u8 sEVLD = (sff1 >> 30) & 0x01; /* valid flag */
381 sFFE = sff1 >> 31; /* empty flag */
382
383 if (sEVLD) {
384 u8 sDST = sff0 >> 16; /* dev status */
385 u8 sHST = sff1 & 0x3f; /* host status */
386 unsigned int port_no = (sff1 >> 8) & 0x03;
387 struct ata_port *ap = host_set->ports[port_no];
388
389 DPRINTK("SFF=%08x%08x: sCHAN=%u sHST=%d sDST=%02x\n",
390 sff1, sff0, port_no, sHST, sDST);
391 handled = 1;
392 if (ap && !(ap->flags &
393 (ATA_FLAG_PORT_DISABLED|ATA_FLAG_NOINTR))) {
394 struct ata_queued_cmd *qc;
395 struct qs_port_priv *pp = ap->private_data;
396 if (!pp || pp->state != qs_state_pkt)
397 continue;
398 qc = ata_qc_from_tag(ap, ap->active_tag);
399 if (qc && (!(qc->tf.ctl & ATA_NIEN))) {
400 switch (sHST) {
401 case 0: /* sucessful CPB */
402 case 3: /* device error */
403 pp->state = qs_state_idle;
404 qs_enter_reg_mode(qc->ap);
405 ata_qc_complete(qc, sDST);
406 break;
407 default:
408 break;
409 }
410 }
411 }
412 }
413 } while (!sFFE);
414 return handled;
415 }
416
417 static inline unsigned int qs_intr_mmio(struct ata_host_set *host_set)
418 {
419 unsigned int handled = 0, port_no;
420
421 for (port_no = 0; port_no < host_set->n_ports; ++port_no) {
422 struct ata_port *ap;
423 ap = host_set->ports[port_no];
424 if (ap &&
425 !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) {
426 struct ata_queued_cmd *qc;
427 struct qs_port_priv *pp = ap->private_data;
428 if (!pp || pp->state != qs_state_mmio)
429 continue;
430 qc = ata_qc_from_tag(ap, ap->active_tag);
431 if (qc && (!(qc->tf.ctl & ATA_NIEN))) {
432
433 /* check main status, clearing INTRQ */
434 u8 status = ata_chk_status(ap);
435 if ((status & ATA_BUSY))
436 continue;
437 DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
438 ap->id, qc->tf.protocol, status);
439
440 /* complete taskfile transaction */
441 pp->state = qs_state_idle;
442 ata_qc_complete(qc, status);
443 handled = 1;
444 }
445 }
446 }
447 return handled;
448 }
449
450 static irqreturn_t qs_intr(int irq, void *dev_instance, struct pt_regs *regs)
451 {
452 struct ata_host_set *host_set = dev_instance;
453 unsigned int handled = 0;
454
455 VPRINTK("ENTER\n");
456
457 spin_lock(&host_set->lock);
458 handled = qs_intr_pkt(host_set) | qs_intr_mmio(host_set);
459 spin_unlock(&host_set->lock);
460
461 VPRINTK("EXIT\n");
462
463 return IRQ_RETVAL(handled);
464 }
465
466 static void qs_ata_setup_port(struct ata_ioports *port, unsigned long base)
467 {
468 port->cmd_addr =
469 port->data_addr = base + 0x400;
470 port->error_addr =
471 port->feature_addr = base + 0x408; /* hob_feature = 0x409 */
472 port->nsect_addr = base + 0x410; /* hob_nsect = 0x411 */
473 port->lbal_addr = base + 0x418; /* hob_lbal = 0x419 */
474 port->lbam_addr = base + 0x420; /* hob_lbam = 0x421 */
475 port->lbah_addr = base + 0x428; /* hob_lbah = 0x429 */
476 port->device_addr = base + 0x430;
477 port->status_addr =
478 port->command_addr = base + 0x438;
479 port->altstatus_addr =
480 port->ctl_addr = base + 0x440;
481 port->scr_addr = base + 0xc00;
482 }
483
484 static int qs_port_start(struct ata_port *ap)
485 {
486 struct device *dev = ap->host_set->dev;
487 struct qs_port_priv *pp;
488 void __iomem *mmio_base = ap->host_set->mmio_base;
489 void __iomem *chan = mmio_base + (ap->port_no * 0x4000);
490 u64 addr;
491 int rc;
492
493 rc = ata_port_start(ap);
494 if (rc)
495 return rc;
496 qs_enter_reg_mode(ap);
497 pp = kcalloc(1, sizeof(*pp), GFP_KERNEL);
498 if (!pp) {
499 rc = -ENOMEM;
500 goto err_out;
501 }
502 pp->pkt = dma_alloc_coherent(dev, QS_PKT_BYTES, &pp->pkt_dma,
503 GFP_KERNEL);
504 if (!pp->pkt) {
505 rc = -ENOMEM;
506 goto err_out_kfree;
507 }
508 memset(pp->pkt, 0, QS_PKT_BYTES);
509 ap->private_data = pp;
510
511 addr = (u64)pp->pkt_dma;
512 writel((u32) addr, chan + QS_CCF_CPBA);
513 writel((u32)(addr >> 32), chan + QS_CCF_CPBA + 4);
514 return 0;
515
516 err_out_kfree:
517 kfree(pp);
518 err_out:
519 ata_port_stop(ap);
520 return rc;
521 }
522
523 static void qs_port_stop(struct ata_port *ap)
524 {
525 struct device *dev = ap->host_set->dev;
526 struct qs_port_priv *pp = ap->private_data;
527
528 if (pp != NULL) {
529 ap->private_data = NULL;
530 if (pp->pkt != NULL)
531 dma_free_coherent(dev, QS_PKT_BYTES, pp->pkt,
532 pp->pkt_dma);
533 kfree(pp);
534 }
535 ata_port_stop(ap);
536 }
537
538 static void qs_host_stop(struct ata_host_set *host_set)
539 {
540 void __iomem *mmio_base = host_set->mmio_base;
541
542 writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */
543 writeb(QS_CNFG3_GSRST, mmio_base + QS_HCF_CNFG3); /* global reset */
544
545 ata_host_stop(host_set);
546 }
547
548 static void qs_host_init(unsigned int chip_id, struct ata_probe_ent *pe)
549 {
550 void __iomem *mmio_base = pe->mmio_base;
551 unsigned int port_no;
552
553 writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */
554 writeb(QS_CNFG3_GSRST, mmio_base + QS_HCF_CNFG3); /* global reset */
555
556 /* reset each channel in turn */
557 for (port_no = 0; port_no < pe->n_ports; ++port_no) {
558 u8 __iomem *chan = mmio_base + (port_no * 0x4000);
559 writeb(QS_CTR1_RDEV|QS_CTR1_RCHN, chan + QS_CCT_CTR1);
560 writeb(QS_CTR0_REG, chan + QS_CCT_CTR0);
561 readb(chan + QS_CCT_CTR0); /* flush */
562 }
563 writeb(QS_SERD3_PHY_ENA, mmio_base + QS_HVS_SERD3); /* enable phy */
564
565 for (port_no = 0; port_no < pe->n_ports; ++port_no) {
566 u8 __iomem *chan = mmio_base + (port_no * 0x4000);
567 /* set FIFO depths to same settings as Windows driver */
568 writew(32, chan + QS_CFC_HUFT);
569 writew(32, chan + QS_CFC_HDFT);
570 writew(10, chan + QS_CFC_DUFT);
571 writew( 8, chan + QS_CFC_DDFT);
572 /* set CPB size in bytes, as a power of two */
573 writeb(QS_CPB_ORDER, chan + QS_CCF_CSEP);
574 }
575 writeb(1, mmio_base + QS_HCT_CTRL); /* enable host interrupts */
576 }
577
578 /*
579 * The QStor understands 64-bit buses, and uses 64-bit fields
580 * for DMA pointers regardless of bus width. We just have to
581 * make sure our DMA masks are set appropriately for whatever
582 * bridge lies between us and the QStor, and then the DMA mapping
583 * code will ensure we only ever "see" appropriate buffer addresses.
584 * If we're 32-bit limited somewhere, then our 64-bit fields will
585 * just end up with zeros in the upper 32-bits, without any special
586 * logic required outside of this routine (below).
587 */
588 static int qs_set_dma_masks(struct pci_dev *pdev, void __iomem *mmio_base)
589 {
590 u32 bus_info = readl(mmio_base + QS_HID_HPHY);
591 int rc, have_64bit_bus = (bus_info & QS_HPHY_64BIT);
592
593 if (have_64bit_bus &&
594 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
595 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
596 if (rc) {
597 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
598 if (rc) {
599 printk(KERN_ERR DRV_NAME
600 "(%s): 64-bit DMA enable failed\n",
601 pci_name(pdev));
602 return rc;
603 }
604 }
605 } else {
606 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
607 if (rc) {
608 printk(KERN_ERR DRV_NAME
609 "(%s): 32-bit DMA enable failed\n",
610 pci_name(pdev));
611 return rc;
612 }
613 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
614 if (rc) {
615 printk(KERN_ERR DRV_NAME
616 "(%s): 32-bit consistent DMA enable failed\n",
617 pci_name(pdev));
618 return rc;
619 }
620 }
621 return 0;
622 }
623
624 static int qs_ata_init_one(struct pci_dev *pdev,
625 const struct pci_device_id *ent)
626 {
627 static int printed_version;
628 struct ata_probe_ent *probe_ent = NULL;
629 void __iomem *mmio_base;
630 unsigned int board_idx = (unsigned int) ent->driver_data;
631 int rc, port_no;
632
633 if (!printed_version++)
634 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
635
636 rc = pci_enable_device(pdev);
637 if (rc)
638 return rc;
639
640 rc = pci_request_regions(pdev, DRV_NAME);
641 if (rc)
642 goto err_out;
643
644 if ((pci_resource_flags(pdev, 4) & IORESOURCE_MEM) == 0) {
645 rc = -ENODEV;
646 goto err_out_regions;
647 }
648
649 mmio_base = ioremap(pci_resource_start(pdev, 4),
650 pci_resource_len(pdev, 4));
651 if (mmio_base == NULL) {
652 rc = -ENOMEM;
653 goto err_out_regions;
654 }
655
656 rc = qs_set_dma_masks(pdev, mmio_base);
657 if (rc)
658 goto err_out_iounmap;
659
660 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
661 if (probe_ent == NULL) {
662 rc = -ENOMEM;
663 goto err_out_iounmap;
664 }
665
666 memset(probe_ent, 0, sizeof(*probe_ent));
667 probe_ent->dev = pci_dev_to_dev(pdev);
668 INIT_LIST_HEAD(&probe_ent->node);
669
670 probe_ent->sht = qs_port_info[board_idx].sht;
671 probe_ent->host_flags = qs_port_info[board_idx].host_flags;
672 probe_ent->pio_mask = qs_port_info[board_idx].pio_mask;
673 probe_ent->mwdma_mask = qs_port_info[board_idx].mwdma_mask;
674 probe_ent->udma_mask = qs_port_info[board_idx].udma_mask;
675 probe_ent->port_ops = qs_port_info[board_idx].port_ops;
676
677 probe_ent->irq = pdev->irq;
678 probe_ent->irq_flags = SA_SHIRQ;
679 probe_ent->mmio_base = mmio_base;
680 probe_ent->n_ports = QS_PORTS;
681
682 for (port_no = 0; port_no < probe_ent->n_ports; ++port_no) {
683 unsigned long chan = (unsigned long)mmio_base +
684 (port_no * 0x4000);
685 qs_ata_setup_port(&probe_ent->port[port_no], chan);
686 }
687
688 pci_set_master(pdev);
689
690 /* initialize adapter */
691 qs_host_init(board_idx, probe_ent);
692
693 rc = ata_device_add(probe_ent);
694 kfree(probe_ent);
695 if (rc != QS_PORTS)
696 goto err_out_iounmap;
697 return 0;
698
699 err_out_iounmap:
700 iounmap(mmio_base);
701 err_out_regions:
702 pci_release_regions(pdev);
703 err_out:
704 pci_disable_device(pdev);
705 return rc;
706 }
707
708 static int __init qs_ata_init(void)
709 {
710 return pci_module_init(&qs_ata_pci_driver);
711 }
712
713 static void __exit qs_ata_exit(void)
714 {
715 pci_unregister_driver(&qs_ata_pci_driver);
716 }
717
718 MODULE_AUTHOR("Mark Lord");
719 MODULE_DESCRIPTION("Pacific Digital Corporation QStor SATA low-level driver");
720 MODULE_LICENSE("GPL");
721 MODULE_DEVICE_TABLE(pci, qs_ata_pci_tbl);
722 MODULE_VERSION(DRV_VERSION);
723
724 module_init(qs_ata_init);
725 module_exit(qs_ata_exit);
Linux kernel - Deliverables
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