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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / drivers / ata / sata_promise.c
blobf251a5f569d52403c8fa246848a0f7ff88d63e5b
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 "2.11"
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 /* register offsets */
57 PDC_FEATURE = 0x04, /* Feature/Error reg (per port) */
58 PDC_SECTOR_COUNT = 0x08, /* Sector count reg (per port) */
59 PDC_SECTOR_NUMBER = 0x0C, /* Sector number reg (per port) */
60 PDC_CYLINDER_LOW = 0x10, /* Cylinder low reg (per port) */
61 PDC_CYLINDER_HIGH = 0x14, /* Cylinder high reg (per port) */
62 PDC_DEVICE = 0x18, /* Device/Head reg (per port) */
63 PDC_COMMAND = 0x1C, /* Command/status reg (per port) */
64 PDC_ALTSTATUS = 0x38, /* Alternate-status/device-control reg (per port) */
65 PDC_PKT_SUBMIT = 0x40, /* Command packet pointer addr */
66 PDC_INT_SEQMASK = 0x40, /* Mask of asserted SEQ INTs */
67 PDC_FLASH_CTL = 0x44, /* Flash control register */
68 PDC_GLOBAL_CTL = 0x48, /* Global control/status (per port) */
69 PDC_CTLSTAT = 0x60, /* IDE control and status (per port) */
70 PDC_SATA_PLUG_CSR = 0x6C, /* SATA Plug control/status reg */
71 PDC2_SATA_PLUG_CSR = 0x60, /* SATAII Plug control/status reg */
72 PDC_TBG_MODE = 0x41C, /* TBG mode (not SATAII) */
73 PDC_SLEW_CTL = 0x470, /* slew rate control reg (not SATAII) */
74
75 /* PDC_GLOBAL_CTL bit definitions */
76 PDC_PH_ERR = (1 << 8), /* PCI error while loading packet */
77 PDC_SH_ERR = (1 << 9), /* PCI error while loading S/G table */
78 PDC_DH_ERR = (1 << 10), /* PCI error while loading data */
79 PDC2_HTO_ERR = (1 << 12), /* host bus timeout */
80 PDC2_ATA_HBA_ERR = (1 << 13), /* error during SATA DATA FIS transmission */
81 PDC2_ATA_DMA_CNT_ERR = (1 << 14), /* DMA DATA FIS size differs from S/G count */
82 PDC_OVERRUN_ERR = (1 << 19), /* S/G byte count larger than HD requires */
83 PDC_UNDERRUN_ERR = (1 << 20), /* S/G byte count less than HD requires */
84 PDC_DRIVE_ERR = (1 << 21), /* drive error */
85 PDC_PCI_SYS_ERR = (1 << 22), /* PCI system error */
86 PDC1_PCI_PARITY_ERR = (1 << 23), /* PCI parity error (from SATA150 driver) */
87 PDC1_ERR_MASK = PDC1_PCI_PARITY_ERR,
88 PDC2_ERR_MASK = PDC2_HTO_ERR | PDC2_ATA_HBA_ERR |
89 PDC2_ATA_DMA_CNT_ERR,
90 PDC_ERR_MASK = PDC_PH_ERR | PDC_SH_ERR | PDC_DH_ERR |
91 PDC_OVERRUN_ERR | PDC_UNDERRUN_ERR |
92 PDC_DRIVE_ERR | PDC_PCI_SYS_ERR |
93 PDC1_ERR_MASK | PDC2_ERR_MASK,
94
95 board_2037x = 0, /* FastTrak S150 TX2plus */
96 board_2037x_pata = 1, /* FastTrak S150 TX2plus PATA port */
97 board_20319 = 2, /* FastTrak S150 TX4 */
98 board_20619 = 3, /* FastTrak TX4000 */
99 board_2057x = 4, /* SATAII150 Tx2plus */
100 board_2057x_pata = 5, /* SATAII150 Tx2plus PATA port */
101 board_40518 = 6, /* SATAII150 Tx4 */
102
103 PDC_HAS_PATA = (1 << 1), /* PDC20375/20575 has PATA */
104
105 /* Sequence counter control registers bit definitions */
106 PDC_SEQCNTRL_INT_MASK = (1 << 5), /* Sequence Interrupt Mask */
107
108 /* Feature register values */
109 PDC_FEATURE_ATAPI_PIO = 0x00, /* ATAPI data xfer by PIO */
110 PDC_FEATURE_ATAPI_DMA = 0x01, /* ATAPI data xfer by DMA */
111
112 /* Device/Head register values */
113 PDC_DEVICE_SATA = 0xE0, /* Device/Head value for SATA devices */
114
115 /* PDC_CTLSTAT bit definitions */
116 PDC_DMA_ENABLE = (1 << 7),
117 PDC_IRQ_DISABLE = (1 << 10),
118 PDC_RESET = (1 << 11), /* HDMA reset */
119
120 PDC_COMMON_FLAGS = ATA_FLAG_NO_LEGACY |
121 ATA_FLAG_MMIO |
122 ATA_FLAG_PIO_POLLING,
123
124 /* ap->flags bits */
125 PDC_FLAG_GEN_II = (1 << 24),
126 PDC_FLAG_SATA_PATA = (1 << 25), /* supports SATA + PATA */
127 PDC_FLAG_4_PORTS = (1 << 26), /* 4 ports */
128 };
129
130 struct pdc_port_priv {
131 u8 *pkt;
132 dma_addr_t pkt_dma;
133 };
134
135 static int pdc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
136 static int pdc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
137 static int pdc_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
138 static int pdc_common_port_start(struct ata_port *ap);
139 static int pdc_sata_port_start(struct ata_port *ap);
140 static void pdc_qc_prep(struct ata_queued_cmd *qc);
141 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
142 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
143 static int pdc_check_atapi_dma(struct ata_queued_cmd *qc);
144 static int pdc_old_sata_check_atapi_dma(struct ata_queued_cmd *qc);
145 static void pdc_irq_clear(struct ata_port *ap);
146 static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc);
147 static void pdc_freeze(struct ata_port *ap);
148 static void pdc_thaw(struct ata_port *ap);
149 static void pdc_pata_error_handler(struct ata_port *ap);
150 static void pdc_sata_error_handler(struct ata_port *ap);
151 static void pdc_post_internal_cmd(struct ata_queued_cmd *qc);
152 static int pdc_pata_cable_detect(struct ata_port *ap);
153 static int pdc_sata_cable_detect(struct ata_port *ap);
154
155 static struct scsi_host_template pdc_ata_sht = {
156 .module = THIS_MODULE,
157 .name = DRV_NAME,
158 .ioctl = ata_scsi_ioctl,
159 .queuecommand = ata_scsi_queuecmd,
160 .can_queue = ATA_DEF_QUEUE,
161 .this_id = ATA_SHT_THIS_ID,
162 .sg_tablesize = PDC_MAX_PRD,
163 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
164 .emulated = ATA_SHT_EMULATED,
165 .use_clustering = ATA_SHT_USE_CLUSTERING,
166 .proc_name = DRV_NAME,
167 .dma_boundary = ATA_DMA_BOUNDARY,
168 .slave_configure = ata_scsi_slave_config,
169 .slave_destroy = ata_scsi_slave_destroy,
170 .bios_param = ata_std_bios_param,
171 };
172
173 static const struct ata_port_operations pdc_sata_ops = {
174 .tf_load = pdc_tf_load_mmio,
175 .tf_read = ata_tf_read,
176 .check_status = ata_check_status,
177 .exec_command = pdc_exec_command_mmio,
178 .dev_select = ata_std_dev_select,
179 .check_atapi_dma = pdc_check_atapi_dma,
180
181 .qc_prep = pdc_qc_prep,
182 .qc_issue = pdc_qc_issue_prot,
183 .freeze = pdc_freeze,
184 .thaw = pdc_thaw,
185 .error_handler = pdc_sata_error_handler,
186 .post_internal_cmd = pdc_post_internal_cmd,
187 .cable_detect = pdc_sata_cable_detect,
188 .data_xfer = ata_data_xfer,
189 .irq_clear = pdc_irq_clear,
190 .irq_on = ata_irq_on,
191
192 .scr_read = pdc_sata_scr_read,
193 .scr_write = pdc_sata_scr_write,
194 .port_start = pdc_sata_port_start,
195 };
196
197 /* First-generation chips need a more restrictive ->check_atapi_dma op */
198 static const struct ata_port_operations pdc_old_sata_ops = {
199 .tf_load = pdc_tf_load_mmio,
200 .tf_read = ata_tf_read,
201 .check_status = ata_check_status,
202 .exec_command = pdc_exec_command_mmio,
203 .dev_select = ata_std_dev_select,
204 .check_atapi_dma = pdc_old_sata_check_atapi_dma,
205
206 .qc_prep = pdc_qc_prep,
207 .qc_issue = pdc_qc_issue_prot,
208 .freeze = pdc_freeze,
209 .thaw = pdc_thaw,
210 .error_handler = pdc_sata_error_handler,
211 .post_internal_cmd = pdc_post_internal_cmd,
212 .cable_detect = pdc_sata_cable_detect,
213 .data_xfer = ata_data_xfer,
214 .irq_clear = pdc_irq_clear,
215 .irq_on = ata_irq_on,
216
217 .scr_read = pdc_sata_scr_read,
218 .scr_write = pdc_sata_scr_write,
219 .port_start = pdc_sata_port_start,
220 };
221
222 static const struct ata_port_operations pdc_pata_ops = {
223 .tf_load = pdc_tf_load_mmio,
224 .tf_read = ata_tf_read,
225 .check_status = ata_check_status,
226 .exec_command = pdc_exec_command_mmio,
227 .dev_select = ata_std_dev_select,
228 .check_atapi_dma = pdc_check_atapi_dma,
229
230 .qc_prep = pdc_qc_prep,
231 .qc_issue = pdc_qc_issue_prot,
232 .freeze = pdc_freeze,
233 .thaw = pdc_thaw,
234 .error_handler = pdc_pata_error_handler,
235 .post_internal_cmd = pdc_post_internal_cmd,
236 .cable_detect = pdc_pata_cable_detect,
237 .data_xfer = ata_data_xfer,
238 .irq_clear = pdc_irq_clear,
239 .irq_on = ata_irq_on,
240
241 .port_start = pdc_common_port_start,
242 };
243
244 static const struct ata_port_info pdc_port_info[] = {
245 [board_2037x] =
246 {
247 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
248 PDC_FLAG_SATA_PATA,
249 .pio_mask = 0x1f, /* pio0-4 */
250 .mwdma_mask = 0x07, /* mwdma0-2 */
251 .udma_mask = ATA_UDMA6,
252 .port_ops = &pdc_old_sata_ops,
253 },
254
255 [board_2037x_pata] =
256 {
257 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS,
258 .pio_mask = 0x1f, /* pio0-4 */
259 .mwdma_mask = 0x07, /* mwdma0-2 */
260 .udma_mask = ATA_UDMA6,
261 .port_ops = &pdc_pata_ops,
262 },
263
264 [board_20319] =
265 {
266 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
267 PDC_FLAG_4_PORTS,
268 .pio_mask = 0x1f, /* pio0-4 */
269 .mwdma_mask = 0x07, /* mwdma0-2 */
270 .udma_mask = ATA_UDMA6,
271 .port_ops = &pdc_old_sata_ops,
272 },
273
274 [board_20619] =
275 {
276 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS |
277 PDC_FLAG_4_PORTS,
278 .pio_mask = 0x1f, /* pio0-4 */
279 .mwdma_mask = 0x07, /* mwdma0-2 */
280 .udma_mask = ATA_UDMA6,
281 .port_ops = &pdc_pata_ops,
282 },
283
284 [board_2057x] =
285 {
286 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
287 PDC_FLAG_GEN_II | PDC_FLAG_SATA_PATA,
288 .pio_mask = 0x1f, /* pio0-4 */
289 .mwdma_mask = 0x07, /* mwdma0-2 */
290 .udma_mask = ATA_UDMA6,
291 .port_ops = &pdc_sata_ops,
292 },
293
294 [board_2057x_pata] =
295 {
296 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS |
297 PDC_FLAG_GEN_II,
298 .pio_mask = 0x1f, /* pio0-4 */
299 .mwdma_mask = 0x07, /* mwdma0-2 */
300 .udma_mask = ATA_UDMA6,
301 .port_ops = &pdc_pata_ops,
302 },
303
304 [board_40518] =
305 {
306 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
307 PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS,
308 .pio_mask = 0x1f, /* pio0-4 */
309 .mwdma_mask = 0x07, /* mwdma0-2 */
310 .udma_mask = ATA_UDMA6,
311 .port_ops = &pdc_sata_ops,
312 },
313 };
314
315 static const struct pci_device_id pdc_ata_pci_tbl[] = {
316 { PCI_VDEVICE(PROMISE, 0x3371), board_2037x },
317 { PCI_VDEVICE(PROMISE, 0x3373), board_2037x },
318 { PCI_VDEVICE(PROMISE, 0x3375), board_2037x },
319 { PCI_VDEVICE(PROMISE, 0x3376), board_2037x },
320 { PCI_VDEVICE(PROMISE, 0x3570), board_2057x },
321 { PCI_VDEVICE(PROMISE, 0x3571), board_2057x },
322 { PCI_VDEVICE(PROMISE, 0x3574), board_2057x },
323 { PCI_VDEVICE(PROMISE, 0x3577), board_2057x },
324 { PCI_VDEVICE(PROMISE, 0x3d73), board_2057x },
325 { PCI_VDEVICE(PROMISE, 0x3d75), board_2057x },
326
327 { PCI_VDEVICE(PROMISE, 0x3318), board_20319 },
328 { PCI_VDEVICE(PROMISE, 0x3319), board_20319 },
329 { PCI_VDEVICE(PROMISE, 0x3515), board_40518 },
330 { PCI_VDEVICE(PROMISE, 0x3519), board_40518 },
331 { PCI_VDEVICE(PROMISE, 0x3d17), board_40518 },
332 { PCI_VDEVICE(PROMISE, 0x3d18), board_40518 },
333
334 { PCI_VDEVICE(PROMISE, 0x6629), board_20619 },
335
336 { } /* terminate list */
337 };
338
339 static struct pci_driver pdc_ata_pci_driver = {
340 .name = DRV_NAME,
341 .id_table = pdc_ata_pci_tbl,
342 .probe = pdc_ata_init_one,
343 .remove = ata_pci_remove_one,
344 };
345
346 static int pdc_common_port_start(struct ata_port *ap)
347 {
348 struct device *dev = ap->host->dev;
349 struct pdc_port_priv *pp;
350 int rc;
351
352 rc = ata_port_start(ap);
353 if (rc)
354 return rc;
355
356 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
357 if (!pp)
358 return -ENOMEM;
359
360 pp->pkt = dmam_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
361 if (!pp->pkt)
362 return -ENOMEM;
363
364 ap->private_data = pp;
365
366 return 0;
367 }
368
369 static int pdc_sata_port_start(struct ata_port *ap)
370 {
371 int rc;
372
373 rc = pdc_common_port_start(ap);
374 if (rc)
375 return rc;
376
377 /* fix up PHYMODE4 align timing */
378 if (ap->flags & PDC_FLAG_GEN_II) {
379 void __iomem *mmio = ap->ioaddr.scr_addr;
380 unsigned int tmp;
381
382 tmp = readl(mmio + 0x014);
383 tmp = (tmp & ~3) | 1; /* set bits 1:0 = 0:1 */
384 writel(tmp, mmio + 0x014);
385 }
386
387 return 0;
388 }
389
390 static void pdc_reset_port(struct ata_port *ap)
391 {
392 void __iomem *mmio = ap->ioaddr.cmd_addr + PDC_CTLSTAT;
393 unsigned int i;
394 u32 tmp;
395
396 for (i = 11; i > 0; i--) {
397 tmp = readl(mmio);
398 if (tmp & PDC_RESET)
399 break;
400
401 udelay(100);
402
403 tmp |= PDC_RESET;
404 writel(tmp, mmio);
405 }
406
407 tmp &= ~PDC_RESET;
408 writel(tmp, mmio);
409 readl(mmio); /* flush */
410 }
411
412 static int pdc_pata_cable_detect(struct ata_port *ap)
413 {
414 u8 tmp;
415 void __iomem *mmio = ap->ioaddr.cmd_addr + PDC_CTLSTAT + 0x03;
416
417 tmp = readb(mmio);
418 if (tmp & 0x01)
419 return ATA_CBL_PATA40;
420 return ATA_CBL_PATA80;
421 }
422
423 static int pdc_sata_cable_detect(struct ata_port *ap)
424 {
425 return ATA_CBL_SATA;
426 }
427
428 static int pdc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
429 {
430 if (sc_reg > SCR_CONTROL)
431 return -EINVAL;
432 *val = readl(ap->ioaddr.scr_addr + (sc_reg * 4));
433 return 0;
434 }
435
436 static int pdc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
437 {
438 if (sc_reg > SCR_CONTROL)
439 return -EINVAL;
440 writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
441 return 0;
442 }
443
444 static void pdc_atapi_pkt(struct ata_queued_cmd *qc)
445 {
446 struct ata_port *ap = qc->ap;
447 dma_addr_t sg_table = ap->prd_dma;
448 unsigned int cdb_len = qc->dev->cdb_len;
449 u8 *cdb = qc->cdb;
450 struct pdc_port_priv *pp = ap->private_data;
451 u8 *buf = pp->pkt;
452 u32 *buf32 = (u32 *) buf;
453 unsigned int dev_sel, feature;
454
455 /* set control bits (byte 0), zero delay seq id (byte 3),
456 * and seq id (byte 2)
457 */
458 switch (qc->tf.protocol) {
459 case ATAPI_PROT_DMA:
460 if (!(qc->tf.flags & ATA_TFLAG_WRITE))
461 buf32[0] = cpu_to_le32(PDC_PKT_READ);
462 else
463 buf32[0] = 0;
464 break;
465 case ATAPI_PROT_NODATA:
466 buf32[0] = cpu_to_le32(PDC_PKT_NODATA);
467 break;
468 default:
469 BUG();
470 break;
471 }
472 buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */
473 buf32[2] = 0; /* no next-packet */
474
475 /* select drive */
476 if (sata_scr_valid(&ap->link))
477 dev_sel = PDC_DEVICE_SATA;
478 else
479 dev_sel = qc->tf.device;
480
481 buf[12] = (1 << 5) | ATA_REG_DEVICE;
482 buf[13] = dev_sel;
483 buf[14] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_CLEAR_BSY;
484 buf[15] = dev_sel; /* once more, waiting for BSY to clear */
485
486 buf[16] = (1 << 5) | ATA_REG_NSECT;
487 buf[17] = qc->tf.nsect;
488 buf[18] = (1 << 5) | ATA_REG_LBAL;
489 buf[19] = qc->tf.lbal;
490
491 /* set feature and byte counter registers */
492 if (qc->tf.protocol != ATAPI_PROT_DMA)
493 feature = PDC_FEATURE_ATAPI_PIO;
494 else
495 feature = PDC_FEATURE_ATAPI_DMA;
496
497 buf[20] = (1 << 5) | ATA_REG_FEATURE;
498 buf[21] = feature;
499 buf[22] = (1 << 5) | ATA_REG_BYTEL;
500 buf[23] = qc->tf.lbam;
501 buf[24] = (1 << 5) | ATA_REG_BYTEH;
502 buf[25] = qc->tf.lbah;
503
504 /* send ATAPI packet command 0xA0 */
505 buf[26] = (1 << 5) | ATA_REG_CMD;
506 buf[27] = qc->tf.command;
507
508 /* select drive and check DRQ */
509 buf[28] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_WAIT_DRDY;
510 buf[29] = dev_sel;
511
512 /* we can represent cdb lengths 2/4/6/8/10/12/14/16 */
513 BUG_ON(cdb_len & ~0x1E);
514
515 /* append the CDB as the final part */
516 buf[30] = (((cdb_len >> 1) & 7) << 5) | ATA_REG_DATA | PDC_LAST_REG;
517 memcpy(buf+31, cdb, cdb_len);
518 }
519
520 /**
521 * pdc_fill_sg - Fill PCI IDE PRD table
522 * @qc: Metadata associated with taskfile to be transferred
523 *
524 * Fill PCI IDE PRD (scatter-gather) table with segments
525 * associated with the current disk command.
526 * Make sure hardware does not choke on it.
527 *
528 * LOCKING:
529 * spin_lock_irqsave(host lock)
530 *
531 */
532 static void pdc_fill_sg(struct ata_queued_cmd *qc)
533 {
534 struct ata_port *ap = qc->ap;
535 struct scatterlist *sg;
536 const u32 SG_COUNT_ASIC_BUG = 41*4;
537 unsigned int si, idx;
538 u32 len;
539
540 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
541 return;
542
543 idx = 0;
544 for_each_sg(qc->sg, sg, qc->n_elem, si) {
545 u32 addr, offset;
546 u32 sg_len;
547
548 /* determine if physical DMA addr spans 64K boundary.
549 * Note h/w doesn't support 64-bit, so we unconditionally
550 * truncate dma_addr_t to u32.
551 */
552 addr = (u32) sg_dma_address(sg);
553 sg_len = sg_dma_len(sg);
554
555 while (sg_len) {
556 offset = addr & 0xffff;
557 len = sg_len;
558 if ((offset + sg_len) > 0x10000)
559 len = 0x10000 - offset;
560
561 ap->prd[idx].addr = cpu_to_le32(addr);
562 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
563 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
564
565 idx++;
566 sg_len -= len;
567 addr += len;
568 }
569 }
570
571 len = le32_to_cpu(ap->prd[idx - 1].flags_len);
572
573 if (len > SG_COUNT_ASIC_BUG) {
574 u32 addr;
575
576 VPRINTK("Splitting last PRD.\n");
577
578 addr = le32_to_cpu(ap->prd[idx - 1].addr);
579 ap->prd[idx - 1].flags_len = cpu_to_le32(len - SG_COUNT_ASIC_BUG);
580 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx - 1, addr, SG_COUNT_ASIC_BUG);
581
582 addr = addr + len - SG_COUNT_ASIC_BUG;
583 len = SG_COUNT_ASIC_BUG;
584 ap->prd[idx].addr = cpu_to_le32(addr);
585 ap->prd[idx].flags_len = cpu_to_le32(len);
586 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
587
588 idx++;
589 }
590
591 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
592 }
593
594 static void pdc_qc_prep(struct ata_queued_cmd *qc)
595 {
596 struct pdc_port_priv *pp = qc->ap->private_data;
597 unsigned int i;
598
599 VPRINTK("ENTER\n");
600
601 switch (qc->tf.protocol) {
602 case ATA_PROT_DMA:
603 pdc_fill_sg(qc);
604 /* fall through */
605
606 case ATA_PROT_NODATA:
607 i = pdc_pkt_header(&qc->tf, qc->ap->prd_dma,
608 qc->dev->devno, pp->pkt);
609
610 if (qc->tf.flags & ATA_TFLAG_LBA48)
611 i = pdc_prep_lba48(&qc->tf, pp->pkt, i);
612 else
613 i = pdc_prep_lba28(&qc->tf, pp->pkt, i);
614
615 pdc_pkt_footer(&qc->tf, pp->pkt, i);
616 break;
617
618 case ATAPI_PROT_PIO:
619 pdc_fill_sg(qc);
620 break;
621
622 case ATAPI_PROT_DMA:
623 pdc_fill_sg(qc);
624 /*FALLTHROUGH*/
625 case ATAPI_PROT_NODATA:
626 pdc_atapi_pkt(qc);
627 break;
628
629 default:
630 break;
631 }
632 }
633
634 static void pdc_freeze(struct ata_port *ap)
635 {
636 void __iomem *mmio = ap->ioaddr.cmd_addr;
637 u32 tmp;
638
639 tmp = readl(mmio + PDC_CTLSTAT);
640 tmp |= PDC_IRQ_DISABLE;
641 tmp &= ~PDC_DMA_ENABLE;
642 writel(tmp, mmio + PDC_CTLSTAT);
643 readl(mmio + PDC_CTLSTAT); /* flush */
644 }
645
646 static void pdc_thaw(struct ata_port *ap)
647 {
648 void __iomem *mmio = ap->ioaddr.cmd_addr;
649 u32 tmp;
650
651 /* clear IRQ */
652 readl(mmio + PDC_INT_SEQMASK);
653
654 /* turn IRQ back on */
655 tmp = readl(mmio + PDC_CTLSTAT);
656 tmp &= ~PDC_IRQ_DISABLE;
657 writel(tmp, mmio + PDC_CTLSTAT);
658 readl(mmio + PDC_CTLSTAT); /* flush */
659 }
660
661 static void pdc_common_error_handler(struct ata_port *ap, ata_reset_fn_t hardreset)
662 {
663 if (!(ap->pflags & ATA_PFLAG_FROZEN))
664 pdc_reset_port(ap);
665
666 /* perform recovery */
667 ata_do_eh(ap, ata_std_prereset, ata_std_softreset, hardreset,
668 ata_std_postreset);
669 }
670
671 static void pdc_pata_error_handler(struct ata_port *ap)
672 {
673 pdc_common_error_handler(ap, NULL);
674 }
675
676 static void pdc_sata_error_handler(struct ata_port *ap)
677 {
678 pdc_common_error_handler(ap, sata_std_hardreset);
679 }
680
681 static void pdc_post_internal_cmd(struct ata_queued_cmd *qc)
682 {
683 struct ata_port *ap = qc->ap;
684
685 /* make DMA engine forget about the failed command */
686 if (qc->flags & ATA_QCFLAG_FAILED)
687 pdc_reset_port(ap);
688 }
689
690 static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc,
691 u32 port_status, u32 err_mask)
692 {
693 struct ata_eh_info *ehi = &ap->link.eh_info;
694 unsigned int ac_err_mask = 0;
695
696 ata_ehi_clear_desc(ehi);
697 ata_ehi_push_desc(ehi, "port_status 0x%08x", port_status);
698 port_status &= err_mask;
699
700 if (port_status & PDC_DRIVE_ERR)
701 ac_err_mask |= AC_ERR_DEV;
702 if (port_status & (PDC_OVERRUN_ERR | PDC_UNDERRUN_ERR))
703 ac_err_mask |= AC_ERR_HSM;
704 if (port_status & (PDC2_ATA_HBA_ERR | PDC2_ATA_DMA_CNT_ERR))
705 ac_err_mask |= AC_ERR_ATA_BUS;
706 if (port_status & (PDC_PH_ERR | PDC_SH_ERR | PDC_DH_ERR | PDC2_HTO_ERR
707 | PDC_PCI_SYS_ERR | PDC1_PCI_PARITY_ERR))
708 ac_err_mask |= AC_ERR_HOST_BUS;
709
710 if (sata_scr_valid(&ap->link)) {
711 u32 serror;
712
713 pdc_sata_scr_read(ap, SCR_ERROR, &serror);
714 ehi->serror |= serror;
715 }
716
717 qc->err_mask |= ac_err_mask;
718
719 pdc_reset_port(ap);
720
721 ata_port_abort(ap);
722 }
723
724 static inline unsigned int pdc_host_intr(struct ata_port *ap,
725 struct ata_queued_cmd *qc)
726 {
727 unsigned int handled = 0;
728 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
729 u32 port_status, err_mask;
730
731 err_mask = PDC_ERR_MASK;
732 if (ap->flags & PDC_FLAG_GEN_II)
733 err_mask &= ~PDC1_ERR_MASK;
734 else
735 err_mask &= ~PDC2_ERR_MASK;
736 port_status = readl(port_mmio + PDC_GLOBAL_CTL);
737 if (unlikely(port_status & err_mask)) {
738 pdc_error_intr(ap, qc, port_status, err_mask);
739 return 1;
740 }
741
742 switch (qc->tf.protocol) {
743 case ATA_PROT_DMA:
744 case ATA_PROT_NODATA:
745 case ATAPI_PROT_DMA:
746 case ATAPI_PROT_NODATA:
747 qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
748 ata_qc_complete(qc);
749 handled = 1;
750 break;
751
752 default:
753 ap->stats.idle_irq++;
754 break;
755 }
756
757 return handled;
758 }
759
760 static void pdc_irq_clear(struct ata_port *ap)
761 {
762 struct ata_host *host = ap->host;
763 void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
764
765 readl(mmio + PDC_INT_SEQMASK);
766 }
767
768 static int pdc_is_sataii_tx4(unsigned long flags)
769 {
770 const unsigned long mask = PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS;
771 return (flags & mask) == mask;
772 }
773
774 static unsigned int pdc_port_no_to_ata_no(unsigned int port_no,
775 int is_sataii_tx4)
776 {
777 static const unsigned char sataii_tx4_port_remap[4] = { 3, 1, 0, 2};
778 return is_sataii_tx4 ? sataii_tx4_port_remap[port_no] : port_no;
779 }
780
781 static irqreturn_t pdc_interrupt(int irq, void *dev_instance)
782 {
783 struct ata_host *host = dev_instance;
784 struct ata_port *ap;
785 u32 mask = 0;
786 unsigned int i, tmp;
787 unsigned int handled = 0;
788 void __iomem *mmio_base;
789 unsigned int hotplug_offset, ata_no;
790 u32 hotplug_status;
791 int is_sataii_tx4;
792
793 VPRINTK("ENTER\n");
794
795 if (!host || !host->iomap[PDC_MMIO_BAR]) {
796 VPRINTK("QUICK EXIT\n");
797 return IRQ_NONE;
798 }
799
800 mmio_base = host->iomap[PDC_MMIO_BAR];
801
802 /* read and clear hotplug flags for all ports */
803 if (host->ports[0]->flags & PDC_FLAG_GEN_II)
804 hotplug_offset = PDC2_SATA_PLUG_CSR;
805 else
806 hotplug_offset = PDC_SATA_PLUG_CSR;
807 hotplug_status = readl(mmio_base + hotplug_offset);
808 if (hotplug_status & 0xff)
809 writel(hotplug_status | 0xff, mmio_base + hotplug_offset);
810 hotplug_status &= 0xff; /* clear uninteresting bits */
811
812 /* reading should also clear interrupts */
813 mask = readl(mmio_base + PDC_INT_SEQMASK);
814
815 if (mask == 0xffffffff && hotplug_status == 0) {
816 VPRINTK("QUICK EXIT 2\n");
817 return IRQ_NONE;
818 }
819
820 spin_lock(&host->lock);
821
822 mask &= 0xffff; /* only 16 tags possible */
823 if (mask == 0 && hotplug_status == 0) {
824 VPRINTK("QUICK EXIT 3\n");
825 goto done_irq;
826 }
827
828 writel(mask, mmio_base + PDC_INT_SEQMASK);
829
830 is_sataii_tx4 = pdc_is_sataii_tx4(host->ports[0]->flags);
831
832 for (i = 0; i < host->n_ports; i++) {
833 VPRINTK("port %u\n", i);
834 ap = host->ports[i];
835
836 /* check for a plug or unplug event */
837 ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
838 tmp = hotplug_status & (0x11 << ata_no);
839 if (tmp && ap &&
840 !(ap->flags & ATA_FLAG_DISABLED)) {
841 struct ata_eh_info *ehi = &ap->link.eh_info;
842 ata_ehi_clear_desc(ehi);
843 ata_ehi_hotplugged(ehi);
844 ata_ehi_push_desc(ehi, "hotplug_status %#x", tmp);
845 ata_port_freeze(ap);
846 ++handled;
847 continue;
848 }
849
850 /* check for a packet interrupt */
851 tmp = mask & (1 << (i + 1));
852 if (tmp && ap &&
853 !(ap->flags & ATA_FLAG_DISABLED)) {
854 struct ata_queued_cmd *qc;
855
856 qc = ata_qc_from_tag(ap, ap->link.active_tag);
857 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
858 handled += pdc_host_intr(ap, qc);
859 }
860 }
861
862 VPRINTK("EXIT\n");
863
864 done_irq:
865 spin_unlock(&host->lock);
866 return IRQ_RETVAL(handled);
867 }
868
869 static inline void pdc_packet_start(struct ata_queued_cmd *qc)
870 {
871 struct ata_port *ap = qc->ap;
872 struct pdc_port_priv *pp = ap->private_data;
873 void __iomem *mmio = ap->host->iomap[PDC_MMIO_BAR];
874 unsigned int port_no = ap->port_no;
875 u8 seq = (u8) (port_no + 1);
876
877 VPRINTK("ENTER, ap %p\n", ap);
878
879 writel(0x00000001, mmio + (seq * 4));
880 readl(mmio + (seq * 4)); /* flush */
881
882 pp->pkt[2] = seq;
883 wmb(); /* flush PRD, pkt writes */
884 writel(pp->pkt_dma, ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
885 readl(ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); /* flush */
886 }
887
888 static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc)
889 {
890 switch (qc->tf.protocol) {
891 case ATAPI_PROT_NODATA:
892 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
893 break;
894 /*FALLTHROUGH*/
895 case ATA_PROT_NODATA:
896 if (qc->tf.flags & ATA_TFLAG_POLLING)
897 break;
898 /*FALLTHROUGH*/
899 case ATAPI_PROT_DMA:
900 case ATA_PROT_DMA:
901 pdc_packet_start(qc);
902 return 0;
903
904 default:
905 break;
906 }
907
908 return ata_qc_issue_prot(qc);
909 }
910
911 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
912 {
913 WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA);
914 ata_tf_load(ap, tf);
915 }
916
917 static void pdc_exec_command_mmio(struct ata_port *ap,
918 const struct ata_taskfile *tf)
919 {
920 WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA);
921 ata_exec_command(ap, tf);
922 }
923
924 static int pdc_check_atapi_dma(struct ata_queued_cmd *qc)
925 {
926 u8 *scsicmd = qc->scsicmd->cmnd;
927 int pio = 1; /* atapi dma off by default */
928
929 /* Whitelist commands that may use DMA. */
930 switch (scsicmd[0]) {
931 case WRITE_12:
932 case WRITE_10:
933 case WRITE_6:
934 case READ_12:
935 case READ_10:
936 case READ_6:
937 case 0xad: /* READ_DVD_STRUCTURE */
938 case 0xbe: /* READ_CD */
939 pio = 0;
940 }
941 /* -45150 (FFFF4FA2) to -1 (FFFFFFFF) shall use PIO mode */
942 if (scsicmd[0] == WRITE_10) {
943 unsigned int lba =
944 (scsicmd[2] << 24) |
945 (scsicmd[3] << 16) |
946 (scsicmd[4] << 8) |
947 scsicmd[5];
948 if (lba >= 0xFFFF4FA2)
949 pio = 1;
950 }
951 return pio;
952 }
953
954 static int pdc_old_sata_check_atapi_dma(struct ata_queued_cmd *qc)
955 {
956 /* First generation chips cannot use ATAPI DMA on SATA ports */
957 return 1;
958 }
959
960 static void pdc_ata_setup_port(struct ata_port *ap,
961 void __iomem *base, void __iomem *scr_addr)
962 {
963 ap->ioaddr.cmd_addr = base;
964 ap->ioaddr.data_addr = base;
965 ap->ioaddr.feature_addr =
966 ap->ioaddr.error_addr = base + 0x4;
967 ap->ioaddr.nsect_addr = base + 0x8;
968 ap->ioaddr.lbal_addr = base + 0xc;
969 ap->ioaddr.lbam_addr = base + 0x10;
970 ap->ioaddr.lbah_addr = base + 0x14;
971 ap->ioaddr.device_addr = base + 0x18;
972 ap->ioaddr.command_addr =
973 ap->ioaddr.status_addr = base + 0x1c;
974 ap->ioaddr.altstatus_addr =
975 ap->ioaddr.ctl_addr = base + 0x38;
976 ap->ioaddr.scr_addr = scr_addr;
977 }
978
979 static void pdc_host_init(struct ata_host *host)
980 {
981 void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
982 int is_gen2 = host->ports[0]->flags & PDC_FLAG_GEN_II;
983 int hotplug_offset;
984 u32 tmp;
985
986 if (is_gen2)
987 hotplug_offset = PDC2_SATA_PLUG_CSR;
988 else
989 hotplug_offset = PDC_SATA_PLUG_CSR;
990
991 /*
992 * Except for the hotplug stuff, this is voodoo from the
993 * Promise driver. Label this entire section
994 * "TODO: figure out why we do this"
995 */
996
997 /* enable BMR_BURST, maybe change FIFO_SHD to 8 dwords */
998 tmp = readl(mmio + PDC_FLASH_CTL);
999 tmp |= 0x02000; /* bit 13 (enable bmr burst) */
1000 if (!is_gen2)
1001 tmp |= 0x10000; /* bit 16 (fifo threshold at 8 dw) */
1002 writel(tmp, mmio + PDC_FLASH_CTL);
1003
1004 /* clear plug/unplug flags for all ports */
1005 tmp = readl(mmio + hotplug_offset);
1006 writel(tmp | 0xff, mmio + hotplug_offset);
1007
1008 /* unmask plug/unplug ints */
1009 tmp = readl(mmio + hotplug_offset);
1010 writel(tmp & ~0xff0000, mmio + hotplug_offset);
1011
1012 /* don't initialise TBG or SLEW on 2nd generation chips */
1013 if (is_gen2)
1014 return;
1015
1016 /* reduce TBG clock to 133 Mhz. */
1017 tmp = readl(mmio + PDC_TBG_MODE);
1018 tmp &= ~0x30000; /* clear bit 17, 16*/
1019 tmp |= 0x10000; /* set bit 17:16 = 0:1 */
1020 writel(tmp, mmio + PDC_TBG_MODE);
1021
1022 readl(mmio + PDC_TBG_MODE); /* flush */
1023 msleep(10);
1024
1025 /* adjust slew rate control register. */
1026 tmp = readl(mmio + PDC_SLEW_CTL);
1027 tmp &= 0xFFFFF03F; /* clear bit 11 ~ 6 */
1028 tmp |= 0x00000900; /* set bit 11-9 = 100b , bit 8-6 = 100 */
1029 writel(tmp, mmio + PDC_SLEW_CTL);
1030 }
1031
1032 static int pdc_ata_init_one(struct pci_dev *pdev,
1033 const struct pci_device_id *ent)
1034 {
1035 static int printed_version;
1036 const struct ata_port_info *pi = &pdc_port_info[ent->driver_data];
1037 const struct ata_port_info *ppi[PDC_MAX_PORTS];
1038 struct ata_host *host;
1039 void __iomem *base;
1040 int n_ports, i, rc;
1041 int is_sataii_tx4;
1042
1043 if (!printed_version++)
1044 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1045
1046 /* enable and acquire resources */
1047 rc = pcim_enable_device(pdev);
1048 if (rc)
1049 return rc;
1050
1051 rc = pcim_iomap_regions(pdev, 1 << PDC_MMIO_BAR, DRV_NAME);
1052 if (rc == -EBUSY)
1053 pcim_pin_device(pdev);
1054 if (rc)
1055 return rc;
1056 base = pcim_iomap_table(pdev)[PDC_MMIO_BAR];
1057
1058 /* determine port configuration and setup host */
1059 n_ports = 2;
1060 if (pi->flags & PDC_FLAG_4_PORTS)
1061 n_ports = 4;
1062 for (i = 0; i < n_ports; i++)
1063 ppi[i] = pi;
1064
1065 if (pi->flags & PDC_FLAG_SATA_PATA) {
1066 u8 tmp = readb(base + PDC_FLASH_CTL+1);
1067 if (!(tmp & 0x80))
1068 ppi[n_ports++] = pi + 1;
1069 }
1070
1071 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
1072 if (!host) {
1073 dev_printk(KERN_ERR, &pdev->dev, "failed to allocate host\n");
1074 return -ENOMEM;
1075 }
1076 host->iomap = pcim_iomap_table(pdev);
1077
1078 is_sataii_tx4 = pdc_is_sataii_tx4(pi->flags);
1079 for (i = 0; i < host->n_ports; i++) {
1080 struct ata_port *ap = host->ports[i];
1081 unsigned int ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
1082 unsigned int port_offset = 0x200 + ata_no * 0x80;
1083 unsigned int scr_offset = 0x400 + ata_no * 0x100;
1084
1085 pdc_ata_setup_port(ap, base + port_offset, base + scr_offset);
1086
1087 ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");
1088 ata_port_pbar_desc(ap, PDC_MMIO_BAR, port_offset, "port");
1089 }
1090
1091 /* initialize adapter */
1092 pdc_host_init(host);
1093
1094 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
1095 if (rc)
1096 return rc;
1097 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
1098 if (rc)
1099 return rc;
1100
1101 /* start host, request IRQ and attach */
1102 pci_set_master(pdev);
1103 return ata_host_activate(host, pdev->irq, pdc_interrupt, IRQF_SHARED,
1104 &pdc_ata_sht);
1105 }
1106
1107 static int __init pdc_ata_init(void)
1108 {
1109 return pci_register_driver(&pdc_ata_pci_driver);
1110 }
1111
1112 static void __exit pdc_ata_exit(void)
1113 {
1114 pci_unregister_driver(&pdc_ata_pci_driver);
1115 }
1116
1117 MODULE_AUTHOR("Jeff Garzik");
1118 MODULE_DESCRIPTION("Promise ATA TX2/TX4/TX4000 low-level driver");
1119 MODULE_LICENSE("GPL");
1120 MODULE_DEVICE_TABLE(pci, pdc_ata_pci_tbl);
1121 MODULE_VERSION(DRV_VERSION);
1122
1123 module_init(pdc_ata_init);
1124 module_exit(pdc_ata_exit);
WRT350N Kernel Patches