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radix-tree: fix small lockless radix-tree bug
[linux-2.6/pdupreez.git] / drivers / ata / pdc_adma.c
blobbe53545c9f64fe055d5e289ce6c68945ca2b6af7
1 /*
2 * pdc_adma.c - Pacific Digital Corporation ADMA
3 *
4 * Maintained by: Mark Lord <mlord@pobox.com>
5 *
6 * Copyright 2005 Mark Lord
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; see the file COPYING. If not, write to
20 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 *
23 * libata documentation is available via 'make {ps|pdf}docs',
24 * as Documentation/DocBook/libata.*
25 *
26 *
27 * Supports ATA disks in single-packet ADMA mode.
28 * Uses PIO for everything else.
29 *
30 * TODO: Use ADMA transfers for ATAPI devices, when possible.
31 * This requires careful attention to a number of quirks of the chip.
32 *
33 */
34
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/init.h>
39 #include <linux/blkdev.h>
40 #include <linux/delay.h>
41 #include <linux/interrupt.h>
42 #include <linux/device.h>
43 #include <scsi/scsi_host.h>
44 #include <linux/libata.h>
45
46 #define DRV_NAME "pdc_adma"
47 #define DRV_VERSION "1.0"
48
49 /* macro to calculate base address for ATA regs */
50 #define ADMA_ATA_REGS(base, port_no) ((base) + ((port_no) * 0x40))
51
52 /* macro to calculate base address for ADMA regs */
53 #define ADMA_REGS(base, port_no) ((base) + 0x80 + ((port_no) * 0x20))
54
55 /* macro to obtain addresses from ata_port */
56 #define ADMA_PORT_REGS(ap) \
57 ADMA_REGS((ap)->host->iomap[ADMA_MMIO_BAR], ap->port_no)
58
59 enum {
60 ADMA_MMIO_BAR = 4,
61
62 ADMA_PORTS = 2,
63 ADMA_CPB_BYTES = 40,
64 ADMA_PRD_BYTES = LIBATA_MAX_PRD * 16,
65 ADMA_PKT_BYTES = ADMA_CPB_BYTES + ADMA_PRD_BYTES,
66
67 ADMA_DMA_BOUNDARY = 0xffffffff,
68
69 /* global register offsets */
70 ADMA_MODE_LOCK = 0x00c7,
71
72 /* per-channel register offsets */
73 ADMA_CONTROL = 0x0000, /* ADMA control */
74 ADMA_STATUS = 0x0002, /* ADMA status */
75 ADMA_CPB_COUNT = 0x0004, /* CPB count */
76 ADMA_CPB_CURRENT = 0x000c, /* current CPB address */
77 ADMA_CPB_NEXT = 0x000c, /* next CPB address */
78 ADMA_CPB_LOOKUP = 0x0010, /* CPB lookup table */
79 ADMA_FIFO_IN = 0x0014, /* input FIFO threshold */
80 ADMA_FIFO_OUT = 0x0016, /* output FIFO threshold */
81
82 /* ADMA_CONTROL register bits */
83 aNIEN = (1 << 8), /* irq mask: 1==masked */
84 aGO = (1 << 7), /* packet trigger ("Go!") */
85 aRSTADM = (1 << 5), /* ADMA logic reset */
86 aPIOMD4 = 0x0003, /* PIO mode 4 */
87
88 /* ADMA_STATUS register bits */
89 aPSD = (1 << 6),
90 aUIRQ = (1 << 4),
91 aPERR = (1 << 0),
92
93 /* CPB bits */
94 cDONE = (1 << 0),
95 cATERR = (1 << 3),
96
97 cVLD = (1 << 0),
98 cDAT = (1 << 2),
99 cIEN = (1 << 3),
100
101 /* PRD bits */
102 pORD = (1 << 4),
103 pDIRO = (1 << 5),
104 pEND = (1 << 7),
105
106 /* ATA register flags */
107 rIGN = (1 << 5),
108 rEND = (1 << 7),
109
110 /* ATA register addresses */
111 ADMA_REGS_CONTROL = 0x0e,
112 ADMA_REGS_SECTOR_COUNT = 0x12,
113 ADMA_REGS_LBA_LOW = 0x13,
114 ADMA_REGS_LBA_MID = 0x14,
115 ADMA_REGS_LBA_HIGH = 0x15,
116 ADMA_REGS_DEVICE = 0x16,
117 ADMA_REGS_COMMAND = 0x17,
118
119 /* PCI device IDs */
120 board_1841_idx = 0, /* ADMA 2-port controller */
121 };
122
123 typedef enum { adma_state_idle, adma_state_pkt, adma_state_mmio } adma_state_t;
124
125 struct adma_port_priv {
126 u8 *pkt;
127 dma_addr_t pkt_dma;
128 adma_state_t state;
129 };
130
131 static int adma_ata_init_one(struct pci_dev *pdev,
132 const struct pci_device_id *ent);
133 static int adma_port_start(struct ata_port *ap);
134 static void adma_port_stop(struct ata_port *ap);
135 static void adma_qc_prep(struct ata_queued_cmd *qc);
136 static unsigned int adma_qc_issue(struct ata_queued_cmd *qc);
137 static int adma_check_atapi_dma(struct ata_queued_cmd *qc);
138 static void adma_freeze(struct ata_port *ap);
139 static void adma_thaw(struct ata_port *ap);
140 static int adma_prereset(struct ata_link *link, unsigned long deadline);
141
142 static struct scsi_host_template adma_ata_sht = {
143 ATA_BASE_SHT(DRV_NAME),
144 .sg_tablesize = LIBATA_MAX_PRD,
145 .dma_boundary = ADMA_DMA_BOUNDARY,
146 };
147
148 static struct ata_port_operations adma_ata_ops = {
149 .inherits = &ata_sff_port_ops,
150
151 .check_atapi_dma = adma_check_atapi_dma,
152 .qc_prep = adma_qc_prep,
153 .qc_issue = adma_qc_issue,
154
155 .freeze = adma_freeze,
156 .thaw = adma_thaw,
157 .prereset = adma_prereset,
158
159 .port_start = adma_port_start,
160 .port_stop = adma_port_stop,
161 };
162
163 static struct ata_port_info adma_port_info[] = {
164 /* board_1841_idx */
165 {
166 .flags = ATA_FLAG_SLAVE_POSS |
167 ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO |
168 ATA_FLAG_PIO_POLLING,
169 .pio_mask = 0x10, /* pio4 */
170 .udma_mask = ATA_UDMA4,
171 .port_ops = &adma_ata_ops,
172 },
173 };
174
175 static const struct pci_device_id adma_ata_pci_tbl[] = {
176 { PCI_VDEVICE(PDC, 0x1841), board_1841_idx },
177
178 { } /* terminate list */
179 };
180
181 static struct pci_driver adma_ata_pci_driver = {
182 .name = DRV_NAME,
183 .id_table = adma_ata_pci_tbl,
184 .probe = adma_ata_init_one,
185 .remove = ata_pci_remove_one,
186 };
187
188 static int adma_check_atapi_dma(struct ata_queued_cmd *qc)
189 {
190 return 1; /* ATAPI DMA not yet supported */
191 }
192
193 static void adma_reset_engine(struct ata_port *ap)
194 {
195 void __iomem *chan = ADMA_PORT_REGS(ap);
196
197 /* reset ADMA to idle state */
198 writew(aPIOMD4 | aNIEN | aRSTADM, chan + ADMA_CONTROL);
199 udelay(2);
200 writew(aPIOMD4, chan + ADMA_CONTROL);
201 udelay(2);
202 }
203
204 static void adma_reinit_engine(struct ata_port *ap)
205 {
206 struct adma_port_priv *pp = ap->private_data;
207 void __iomem *chan = ADMA_PORT_REGS(ap);
208
209 /* mask/clear ATA interrupts */
210 writeb(ATA_NIEN, ap->ioaddr.ctl_addr);
211 ata_sff_check_status(ap);
212
213 /* reset the ADMA engine */
214 adma_reset_engine(ap);
215
216 /* set in-FIFO threshold to 0x100 */
217 writew(0x100, chan + ADMA_FIFO_IN);
218
219 /* set CPB pointer */
220 writel((u32)pp->pkt_dma, chan + ADMA_CPB_NEXT);
221
222 /* set out-FIFO threshold to 0x100 */
223 writew(0x100, chan + ADMA_FIFO_OUT);
224
225 /* set CPB count */
226 writew(1, chan + ADMA_CPB_COUNT);
227
228 /* read/discard ADMA status */
229 readb(chan + ADMA_STATUS);
230 }
231
232 static inline void adma_enter_reg_mode(struct ata_port *ap)
233 {
234 void __iomem *chan = ADMA_PORT_REGS(ap);
235
236 writew(aPIOMD4, chan + ADMA_CONTROL);
237 readb(chan + ADMA_STATUS); /* flush */
238 }
239
240 static void adma_freeze(struct ata_port *ap)
241 {
242 void __iomem *chan = ADMA_PORT_REGS(ap);
243
244 /* mask/clear ATA interrupts */
245 writeb(ATA_NIEN, ap->ioaddr.ctl_addr);
246 ata_sff_check_status(ap);
247
248 /* reset ADMA to idle state */
249 writew(aPIOMD4 | aNIEN | aRSTADM, chan + ADMA_CONTROL);
250 udelay(2);
251 writew(aPIOMD4 | aNIEN, chan + ADMA_CONTROL);
252 udelay(2);
253 }
254
255 static void adma_thaw(struct ata_port *ap)
256 {
257 adma_reinit_engine(ap);
258 }
259
260 static int adma_prereset(struct ata_link *link, unsigned long deadline)
261 {
262 struct ata_port *ap = link->ap;
263 struct adma_port_priv *pp = ap->private_data;
264
265 if (pp->state != adma_state_idle) /* healthy paranoia */
266 pp->state = adma_state_mmio;
267 adma_reinit_engine(ap);
268
269 return ata_sff_prereset(link, deadline);
270 }
271
272 static int adma_fill_sg(struct ata_queued_cmd *qc)
273 {
274 struct scatterlist *sg;
275 struct ata_port *ap = qc->ap;
276 struct adma_port_priv *pp = ap->private_data;
277 u8 *buf = pp->pkt, *last_buf = NULL;
278 int i = (2 + buf[3]) * 8;
279 u8 pFLAGS = pORD | ((qc->tf.flags & ATA_TFLAG_WRITE) ? pDIRO : 0);
280 unsigned int si;
281
282 for_each_sg(qc->sg, sg, qc->n_elem, si) {
283 u32 addr;
284 u32 len;
285
286 addr = (u32)sg_dma_address(sg);
287 *(__le32 *)(buf + i) = cpu_to_le32(addr);
288 i += 4;
289
290 len = sg_dma_len(sg) >> 3;
291 *(__le32 *)(buf + i) = cpu_to_le32(len);
292 i += 4;
293
294 last_buf = &buf[i];
295 buf[i++] = pFLAGS;
296 buf[i++] = qc->dev->dma_mode & 0xf;
297 buf[i++] = 0; /* pPKLW */
298 buf[i++] = 0; /* reserved */
299
300 *(__le32 *)(buf + i) =
301 (pFLAGS & pEND) ? 0 : cpu_to_le32(pp->pkt_dma + i + 4);
302 i += 4;
303
304 VPRINTK("PRD[%u] = (0x%lX, 0x%X)\n", i/4,
305 (unsigned long)addr, len);
306 }
307
308 if (likely(last_buf))
309 *last_buf |= pEND;
310
311 return i;
312 }
313
314 static void adma_qc_prep(struct ata_queued_cmd *qc)
315 {
316 struct adma_port_priv *pp = qc->ap->private_data;
317 u8 *buf = pp->pkt;
318 u32 pkt_dma = (u32)pp->pkt_dma;
319 int i = 0;
320
321 VPRINTK("ENTER\n");
322
323 adma_enter_reg_mode(qc->ap);
324 if (qc->tf.protocol != ATA_PROT_DMA) {
325 ata_sff_qc_prep(qc);
326 return;
327 }
328
329 buf[i++] = 0; /* Response flags */
330 buf[i++] = 0; /* reserved */
331 buf[i++] = cVLD | cDAT | cIEN;
332 i++; /* cLEN, gets filled in below */
333
334 *(__le32 *)(buf+i) = cpu_to_le32(pkt_dma); /* cNCPB */
335 i += 4; /* cNCPB */
336 i += 4; /* cPRD, gets filled in below */
337
338 buf[i++] = 0; /* reserved */
339 buf[i++] = 0; /* reserved */
340 buf[i++] = 0; /* reserved */
341 buf[i++] = 0; /* reserved */
342
343 /* ATA registers; must be a multiple of 4 */
344 buf[i++] = qc->tf.device;
345 buf[i++] = ADMA_REGS_DEVICE;
346 if ((qc->tf.flags & ATA_TFLAG_LBA48)) {
347 buf[i++] = qc->tf.hob_nsect;
348 buf[i++] = ADMA_REGS_SECTOR_COUNT;
349 buf[i++] = qc->tf.hob_lbal;
350 buf[i++] = ADMA_REGS_LBA_LOW;
351 buf[i++] = qc->tf.hob_lbam;
352 buf[i++] = ADMA_REGS_LBA_MID;
353 buf[i++] = qc->tf.hob_lbah;
354 buf[i++] = ADMA_REGS_LBA_HIGH;
355 }
356 buf[i++] = qc->tf.nsect;
357 buf[i++] = ADMA_REGS_SECTOR_COUNT;
358 buf[i++] = qc->tf.lbal;
359 buf[i++] = ADMA_REGS_LBA_LOW;
360 buf[i++] = qc->tf.lbam;
361 buf[i++] = ADMA_REGS_LBA_MID;
362 buf[i++] = qc->tf.lbah;
363 buf[i++] = ADMA_REGS_LBA_HIGH;
364 buf[i++] = 0;
365 buf[i++] = ADMA_REGS_CONTROL;
366 buf[i++] = rIGN;
367 buf[i++] = 0;
368 buf[i++] = qc->tf.command;
369 buf[i++] = ADMA_REGS_COMMAND | rEND;
370
371 buf[3] = (i >> 3) - 2; /* cLEN */
372 *(__le32 *)(buf+8) = cpu_to_le32(pkt_dma + i); /* cPRD */
373
374 i = adma_fill_sg(qc);
375 wmb(); /* flush PRDs and pkt to memory */
376 #if 0
377 /* dump out CPB + PRDs for debug */
378 {
379 int j, len = 0;
380 static char obuf[2048];
381 for (j = 0; j < i; ++j) {
382 len += sprintf(obuf+len, "%02x ", buf[j]);
383 if ((j & 7) == 7) {
384 printk("%s\n", obuf);
385 len = 0;
386 }
387 }
388 if (len)
389 printk("%s\n", obuf);
390 }
391 #endif
392 }
393
394 static inline void adma_packet_start(struct ata_queued_cmd *qc)
395 {
396 struct ata_port *ap = qc->ap;
397 void __iomem *chan = ADMA_PORT_REGS(ap);
398
399 VPRINTK("ENTER, ap %p\n", ap);
400
401 /* fire up the ADMA engine */
402 writew(aPIOMD4 | aGO, chan + ADMA_CONTROL);
403 }
404
405 static unsigned int adma_qc_issue(struct ata_queued_cmd *qc)
406 {
407 struct adma_port_priv *pp = qc->ap->private_data;
408
409 switch (qc->tf.protocol) {
410 case ATA_PROT_DMA:
411 pp->state = adma_state_pkt;
412 adma_packet_start(qc);
413 return 0;
414
415 case ATAPI_PROT_DMA:
416 BUG();
417 break;
418
419 default:
420 break;
421 }
422
423 pp->state = adma_state_mmio;
424 return ata_sff_qc_issue(qc);
425 }
426
427 static inline unsigned int adma_intr_pkt(struct ata_host *host)
428 {
429 unsigned int handled = 0, port_no;
430
431 for (port_no = 0; port_no < host->n_ports; ++port_no) {
432 struct ata_port *ap = host->ports[port_no];
433 struct adma_port_priv *pp;
434 struct ata_queued_cmd *qc;
435 void __iomem *chan = ADMA_PORT_REGS(ap);
436 u8 status = readb(chan + ADMA_STATUS);
437
438 if (status == 0)
439 continue;
440 handled = 1;
441 adma_enter_reg_mode(ap);
442 if (ap->flags & ATA_FLAG_DISABLED)
443 continue;
444 pp = ap->private_data;
445 if (!pp || pp->state != adma_state_pkt)
446 continue;
447 qc = ata_qc_from_tag(ap, ap->link.active_tag);
448 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) {
449 if (status & aPERR)
450 qc->err_mask |= AC_ERR_HOST_BUS;
451 else if ((status & (aPSD | aUIRQ)))
452 qc->err_mask |= AC_ERR_OTHER;
453
454 if (pp->pkt[0] & cATERR)
455 qc->err_mask |= AC_ERR_DEV;
456 else if (pp->pkt[0] != cDONE)
457 qc->err_mask |= AC_ERR_OTHER;
458
459 if (!qc->err_mask)
460 ata_qc_complete(qc);
461 else {
462 struct ata_eh_info *ehi = &ap->link.eh_info;
463 ata_ehi_clear_desc(ehi);
464 ata_ehi_push_desc(ehi,
465 "ADMA-status 0x%02X", status);
466 ata_ehi_push_desc(ehi,
467 "pkt[0] 0x%02X", pp->pkt[0]);
468
469 if (qc->err_mask == AC_ERR_DEV)
470 ata_port_abort(ap);
471 else
472 ata_port_freeze(ap);
473 }
474 }
475 }
476 return handled;
477 }
478
479 static inline unsigned int adma_intr_mmio(struct ata_host *host)
480 {
481 unsigned int handled = 0, port_no;
482
483 for (port_no = 0; port_no < host->n_ports; ++port_no) {
484 struct ata_port *ap;
485 ap = host->ports[port_no];
486 if (ap && (!(ap->flags & ATA_FLAG_DISABLED))) {
487 struct ata_queued_cmd *qc;
488 struct adma_port_priv *pp = ap->private_data;
489 if (!pp || pp->state != adma_state_mmio)
490 continue;
491 qc = ata_qc_from_tag(ap, ap->link.active_tag);
492 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) {
493
494 /* check main status, clearing INTRQ */
495 u8 status = ata_sff_check_status(ap);
496 if ((status & ATA_BUSY))
497 continue;
498 DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
499 ap->print_id, qc->tf.protocol, status);
500
501 /* complete taskfile transaction */
502 pp->state = adma_state_idle;
503 qc->err_mask |= ac_err_mask(status);
504 if (!qc->err_mask)
505 ata_qc_complete(qc);
506 else {
507 struct ata_eh_info *ehi =
508 &ap->link.eh_info;
509 ata_ehi_clear_desc(ehi);
510 ata_ehi_push_desc(ehi,
511 "status 0x%02X", status);
512
513 if (qc->err_mask == AC_ERR_DEV)
514 ata_port_abort(ap);
515 else
516 ata_port_freeze(ap);
517 }
518 handled = 1;
519 }
520 }
521 }
522 return handled;
523 }
524
525 static irqreturn_t adma_intr(int irq, void *dev_instance)
526 {
527 struct ata_host *host = dev_instance;
528 unsigned int handled = 0;
529
530 VPRINTK("ENTER\n");
531
532 spin_lock(&host->lock);
533 handled = adma_intr_pkt(host) | adma_intr_mmio(host);
534 spin_unlock(&host->lock);
535
536 VPRINTK("EXIT\n");
537
538 return IRQ_RETVAL(handled);
539 }
540
541 static void adma_ata_setup_port(struct ata_ioports *port, void __iomem *base)
542 {
543 port->cmd_addr =
544 port->data_addr = base + 0x000;
545 port->error_addr =
546 port->feature_addr = base + 0x004;
547 port->nsect_addr = base + 0x008;
548 port->lbal_addr = base + 0x00c;
549 port->lbam_addr = base + 0x010;
550 port->lbah_addr = base + 0x014;
551 port->device_addr = base + 0x018;
552 port->status_addr =
553 port->command_addr = base + 0x01c;
554 port->altstatus_addr =
555 port->ctl_addr = base + 0x038;
556 }
557
558 static int adma_port_start(struct ata_port *ap)
559 {
560 struct device *dev = ap->host->dev;
561 struct adma_port_priv *pp;
562 int rc;
563
564 rc = ata_port_start(ap);
565 if (rc)
566 return rc;
567 adma_enter_reg_mode(ap);
568 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
569 if (!pp)
570 return -ENOMEM;
571 pp->pkt = dmam_alloc_coherent(dev, ADMA_PKT_BYTES, &pp->pkt_dma,
572 GFP_KERNEL);
573 if (!pp->pkt)
574 return -ENOMEM;
575 /* paranoia? */
576 if ((pp->pkt_dma & 7) != 0) {
577 printk(KERN_ERR "bad alignment for pp->pkt_dma: %08x\n",
578 (u32)pp->pkt_dma);
579 return -ENOMEM;
580 }
581 memset(pp->pkt, 0, ADMA_PKT_BYTES);
582 ap->private_data = pp;
583 adma_reinit_engine(ap);
584 return 0;
585 }
586
587 static void adma_port_stop(struct ata_port *ap)
588 {
589 adma_reset_engine(ap);
590 }
591
592 static void adma_host_init(struct ata_host *host, unsigned int chip_id)
593 {
594 unsigned int port_no;
595
596 /* enable/lock aGO operation */
597 writeb(7, host->iomap[ADMA_MMIO_BAR] + ADMA_MODE_LOCK);
598
599 /* reset the ADMA logic */
600 for (port_no = 0; port_no < ADMA_PORTS; ++port_no)
601 adma_reset_engine(host->ports[port_no]);
602 }
603
604 static int adma_set_dma_masks(struct pci_dev *pdev, void __iomem *mmio_base)
605 {
606 int rc;
607
608 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
609 if (rc) {
610 dev_printk(KERN_ERR, &pdev->dev,
611 "32-bit DMA enable failed\n");
612 return rc;
613 }
614 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
615 if (rc) {
616 dev_printk(KERN_ERR, &pdev->dev,
617 "32-bit consistent DMA enable failed\n");
618 return rc;
619 }
620 return 0;
621 }
622
623 static int adma_ata_init_one(struct pci_dev *pdev,
624 const struct pci_device_id *ent)
625 {
626 static int printed_version;
627 unsigned int board_idx = (unsigned int) ent->driver_data;
628 const struct ata_port_info *ppi[] = { &adma_port_info[board_idx], NULL };
629 struct ata_host *host;
630 void __iomem *mmio_base;
631 int rc, port_no;
632
633 if (!printed_version++)
634 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
635
636 /* alloc host */
637 host = ata_host_alloc_pinfo(&pdev->dev, ppi, ADMA_PORTS);
638 if (!host)
639 return -ENOMEM;
640
641 /* acquire resources and fill host */
642 rc = pcim_enable_device(pdev);
643 if (rc)
644 return rc;
645
646 if ((pci_resource_flags(pdev, 4) & IORESOURCE_MEM) == 0)
647 return -ENODEV;
648
649 rc = pcim_iomap_regions(pdev, 1 << ADMA_MMIO_BAR, DRV_NAME);
650 if (rc)
651 return rc;
652 host->iomap = pcim_iomap_table(pdev);
653 mmio_base = host->iomap[ADMA_MMIO_BAR];
654
655 rc = adma_set_dma_masks(pdev, mmio_base);
656 if (rc)
657 return rc;
658
659 for (port_no = 0; port_no < ADMA_PORTS; ++port_no) {
660 struct ata_port *ap = host->ports[port_no];
661 void __iomem *port_base = ADMA_ATA_REGS(mmio_base, port_no);
662 unsigned int offset = port_base - mmio_base;
663
664 adma_ata_setup_port(&ap->ioaddr, port_base);
665
666 ata_port_pbar_desc(ap, ADMA_MMIO_BAR, -1, "mmio");
667 ata_port_pbar_desc(ap, ADMA_MMIO_BAR, offset, "port");
668 }
669
670 /* initialize adapter */
671 adma_host_init(host, board_idx);
672
673 pci_set_master(pdev);
674 return ata_host_activate(host, pdev->irq, adma_intr, IRQF_SHARED,
675 &adma_ata_sht);
676 }
677
678 static int __init adma_ata_init(void)
679 {
680 return pci_register_driver(&adma_ata_pci_driver);
681 }
682
683 static void __exit adma_ata_exit(void)
684 {
685 pci_unregister_driver(&adma_ata_pci_driver);
686 }
687
688 MODULE_AUTHOR("Mark Lord");
689 MODULE_DESCRIPTION("Pacific Digital Corporation ADMA low-level driver");
690 MODULE_LICENSE("GPL");
691 MODULE_DEVICE_TABLE(pci, adma_ata_pci_tbl);
692 MODULE_VERSION(DRV_VERSION);
693
694 module_init(adma_ata_init);
695 module_exit(adma_ata_exit);
Linux branches of Pieter du Preez