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firewire: prevent userspace from accessing shut down devices
[linux-2.6/mini2440.git] / drivers / ata / sata_promise.c
blob030665ba76b73a308fd0e35693742140b761792c
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_port *ap, unsigned int sc_reg, u32 *val);
141 static int pdc_sata_scr_write(struct ata_port *ap, 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 void pdc_error_handler(struct ata_port *ap);
157 static void pdc_post_internal_cmd(struct ata_queued_cmd *qc);
158 static int pdc_pata_cable_detect(struct ata_port *ap);
159 static int pdc_sata_cable_detect(struct ata_port *ap);
160
161 static struct scsi_host_template pdc_ata_sht = {
162 ATA_BASE_SHT(DRV_NAME),
163 .sg_tablesize = PDC_MAX_PRD,
164 .dma_boundary = ATA_DMA_BOUNDARY,
165 };
166
167 static const struct ata_port_operations pdc_common_ops = {
168 .inherits = &ata_sff_port_ops,
169
170 .sff_tf_load = pdc_tf_load_mmio,
171 .sff_exec_command = pdc_exec_command_mmio,
172 .check_atapi_dma = pdc_check_atapi_dma,
173 .qc_prep = pdc_qc_prep,
174 .qc_issue = pdc_qc_issue,
175 .sff_irq_clear = pdc_irq_clear,
176
177 .post_internal_cmd = pdc_post_internal_cmd,
178 .error_handler = pdc_error_handler,
179 };
180
181 static struct ata_port_operations pdc_sata_ops = {
182 .inherits = &pdc_common_ops,
183 .cable_detect = pdc_sata_cable_detect,
184 .freeze = pdc_sata_freeze,
185 .thaw = pdc_sata_thaw,
186 .scr_read = pdc_sata_scr_read,
187 .scr_write = pdc_sata_scr_write,
188 .port_start = pdc_sata_port_start,
189 };
190
191 /* First-generation chips need a more restrictive ->check_atapi_dma op */
192 static struct ata_port_operations pdc_old_sata_ops = {
193 .inherits = &pdc_sata_ops,
194 .check_atapi_dma = pdc_old_sata_check_atapi_dma,
195 };
196
197 static struct ata_port_operations pdc_pata_ops = {
198 .inherits = &pdc_common_ops,
199 .cable_detect = pdc_pata_cable_detect,
200 .freeze = pdc_freeze,
201 .thaw = pdc_thaw,
202 .port_start = pdc_common_port_start,
203 };
204
205 static const struct ata_port_info pdc_port_info[] = {
206 [board_2037x] =
207 {
208 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
209 PDC_FLAG_SATA_PATA,
210 .pio_mask = 0x1f, /* pio0-4 */
211 .mwdma_mask = 0x07, /* mwdma0-2 */
212 .udma_mask = ATA_UDMA6,
213 .port_ops = &pdc_old_sata_ops,
214 },
215
216 [board_2037x_pata] =
217 {
218 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS,
219 .pio_mask = 0x1f, /* pio0-4 */
220 .mwdma_mask = 0x07, /* mwdma0-2 */
221 .udma_mask = ATA_UDMA6,
222 .port_ops = &pdc_pata_ops,
223 },
224
225 [board_20319] =
226 {
227 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
228 PDC_FLAG_4_PORTS,
229 .pio_mask = 0x1f, /* pio0-4 */
230 .mwdma_mask = 0x07, /* mwdma0-2 */
231 .udma_mask = ATA_UDMA6,
232 .port_ops = &pdc_old_sata_ops,
233 },
234
235 [board_20619] =
236 {
237 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS |
238 PDC_FLAG_4_PORTS,
239 .pio_mask = 0x1f, /* pio0-4 */
240 .mwdma_mask = 0x07, /* mwdma0-2 */
241 .udma_mask = ATA_UDMA6,
242 .port_ops = &pdc_pata_ops,
243 },
244
245 [board_2057x] =
246 {
247 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
248 PDC_FLAG_GEN_II | 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_sata_ops,
253 },
254
255 [board_2057x_pata] =
256 {
257 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS |
258 PDC_FLAG_GEN_II,
259 .pio_mask = 0x1f, /* pio0-4 */
260 .mwdma_mask = 0x07, /* mwdma0-2 */
261 .udma_mask = ATA_UDMA6,
262 .port_ops = &pdc_pata_ops,
263 },
264
265 [board_40518] =
266 {
267 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
268 PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS,
269 .pio_mask = 0x1f, /* pio0-4 */
270 .mwdma_mask = 0x07, /* mwdma0-2 */
271 .udma_mask = ATA_UDMA6,
272 .port_ops = &pdc_sata_ops,
273 },
274 };
275
276 static const struct pci_device_id pdc_ata_pci_tbl[] = {
277 { PCI_VDEVICE(PROMISE, 0x3371), board_2037x },
278 { PCI_VDEVICE(PROMISE, 0x3373), board_2037x },
279 { PCI_VDEVICE(PROMISE, 0x3375), board_2037x },
280 { PCI_VDEVICE(PROMISE, 0x3376), board_2037x },
281 { PCI_VDEVICE(PROMISE, 0x3570), board_2057x },
282 { PCI_VDEVICE(PROMISE, 0x3571), board_2057x },
283 { PCI_VDEVICE(PROMISE, 0x3574), board_2057x },
284 { PCI_VDEVICE(PROMISE, 0x3577), board_2057x },
285 { PCI_VDEVICE(PROMISE, 0x3d73), board_2057x },
286 { PCI_VDEVICE(PROMISE, 0x3d75), board_2057x },
287
288 { PCI_VDEVICE(PROMISE, 0x3318), board_20319 },
289 { PCI_VDEVICE(PROMISE, 0x3319), board_20319 },
290 { PCI_VDEVICE(PROMISE, 0x3515), board_40518 },
291 { PCI_VDEVICE(PROMISE, 0x3519), board_40518 },
292 { PCI_VDEVICE(PROMISE, 0x3d17), board_40518 },
293 { PCI_VDEVICE(PROMISE, 0x3d18), board_40518 },
294
295 { PCI_VDEVICE(PROMISE, 0x6629), board_20619 },
296
297 { } /* terminate list */
298 };
299
300 static struct pci_driver pdc_ata_pci_driver = {
301 .name = DRV_NAME,
302 .id_table = pdc_ata_pci_tbl,
303 .probe = pdc_ata_init_one,
304 .remove = ata_pci_remove_one,
305 };
306
307 static int pdc_common_port_start(struct ata_port *ap)
308 {
309 struct device *dev = ap->host->dev;
310 struct pdc_port_priv *pp;
311 int rc;
312
313 rc = ata_port_start(ap);
314 if (rc)
315 return rc;
316
317 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
318 if (!pp)
319 return -ENOMEM;
320
321 pp->pkt = dmam_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
322 if (!pp->pkt)
323 return -ENOMEM;
324
325 ap->private_data = pp;
326
327 return 0;
328 }
329
330 static int pdc_sata_port_start(struct ata_port *ap)
331 {
332 int rc;
333
334 rc = pdc_common_port_start(ap);
335 if (rc)
336 return rc;
337
338 /* fix up PHYMODE4 align timing */
339 if (ap->flags & PDC_FLAG_GEN_II) {
340 void __iomem *sata_mmio = ap->ioaddr.scr_addr;
341 unsigned int tmp;
342
343 tmp = readl(sata_mmio + PDC_PHYMODE4);
344 tmp = (tmp & ~3) | 1; /* set bits 1:0 = 0:1 */
345 writel(tmp, sata_mmio + PDC_PHYMODE4);
346 }
347
348 return 0;
349 }
350
351 static void pdc_reset_port(struct ata_port *ap)
352 {
353 void __iomem *ata_ctlstat_mmio = ap->ioaddr.cmd_addr + PDC_CTLSTAT;
354 unsigned int i;
355 u32 tmp;
356
357 for (i = 11; i > 0; i--) {
358 tmp = readl(ata_ctlstat_mmio);
359 if (tmp & PDC_RESET)
360 break;
361
362 udelay(100);
363
364 tmp |= PDC_RESET;
365 writel(tmp, ata_ctlstat_mmio);
366 }
367
368 tmp &= ~PDC_RESET;
369 writel(tmp, ata_ctlstat_mmio);
370 readl(ata_ctlstat_mmio); /* flush */
371 }
372
373 static int pdc_pata_cable_detect(struct ata_port *ap)
374 {
375 u8 tmp;
376 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
377
378 tmp = readb(ata_mmio + PDC_CTLSTAT + 3);
379 if (tmp & 0x01)
380 return ATA_CBL_PATA40;
381 return ATA_CBL_PATA80;
382 }
383
384 static int pdc_sata_cable_detect(struct ata_port *ap)
385 {
386 return ATA_CBL_SATA;
387 }
388
389 static int pdc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
390 {
391 if (sc_reg > SCR_CONTROL)
392 return -EINVAL;
393 *val = readl(ap->ioaddr.scr_addr + (sc_reg * 4));
394 return 0;
395 }
396
397 static int pdc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
398 {
399 if (sc_reg > SCR_CONTROL)
400 return -EINVAL;
401 writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
402 return 0;
403 }
404
405 static void pdc_atapi_pkt(struct ata_queued_cmd *qc)
406 {
407 struct ata_port *ap = qc->ap;
408 dma_addr_t sg_table = ap->prd_dma;
409 unsigned int cdb_len = qc->dev->cdb_len;
410 u8 *cdb = qc->cdb;
411 struct pdc_port_priv *pp = ap->private_data;
412 u8 *buf = pp->pkt;
413 __le32 *buf32 = (__le32 *) buf;
414 unsigned int dev_sel, feature;
415
416 /* set control bits (byte 0), zero delay seq id (byte 3),
417 * and seq id (byte 2)
418 */
419 switch (qc->tf.protocol) {
420 case ATAPI_PROT_DMA:
421 if (!(qc->tf.flags & ATA_TFLAG_WRITE))
422 buf32[0] = cpu_to_le32(PDC_PKT_READ);
423 else
424 buf32[0] = 0;
425 break;
426 case ATAPI_PROT_NODATA:
427 buf32[0] = cpu_to_le32(PDC_PKT_NODATA);
428 break;
429 default:
430 BUG();
431 break;
432 }
433 buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */
434 buf32[2] = 0; /* no next-packet */
435
436 /* select drive */
437 if (sata_scr_valid(&ap->link))
438 dev_sel = PDC_DEVICE_SATA;
439 else
440 dev_sel = qc->tf.device;
441
442 buf[12] = (1 << 5) | ATA_REG_DEVICE;
443 buf[13] = dev_sel;
444 buf[14] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_CLEAR_BSY;
445 buf[15] = dev_sel; /* once more, waiting for BSY to clear */
446
447 buf[16] = (1 << 5) | ATA_REG_NSECT;
448 buf[17] = qc->tf.nsect;
449 buf[18] = (1 << 5) | ATA_REG_LBAL;
450 buf[19] = qc->tf.lbal;
451
452 /* set feature and byte counter registers */
453 if (qc->tf.protocol != ATAPI_PROT_DMA)
454 feature = PDC_FEATURE_ATAPI_PIO;
455 else
456 feature = PDC_FEATURE_ATAPI_DMA;
457
458 buf[20] = (1 << 5) | ATA_REG_FEATURE;
459 buf[21] = feature;
460 buf[22] = (1 << 5) | ATA_REG_BYTEL;
461 buf[23] = qc->tf.lbam;
462 buf[24] = (1 << 5) | ATA_REG_BYTEH;
463 buf[25] = qc->tf.lbah;
464
465 /* send ATAPI packet command 0xA0 */
466 buf[26] = (1 << 5) | ATA_REG_CMD;
467 buf[27] = qc->tf.command;
468
469 /* select drive and check DRQ */
470 buf[28] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_WAIT_DRDY;
471 buf[29] = dev_sel;
472
473 /* we can represent cdb lengths 2/4/6/8/10/12/14/16 */
474 BUG_ON(cdb_len & ~0x1E);
475
476 /* append the CDB as the final part */
477 buf[30] = (((cdb_len >> 1) & 7) << 5) | ATA_REG_DATA | PDC_LAST_REG;
478 memcpy(buf+31, cdb, cdb_len);
479 }
480
481 /**
482 * pdc_fill_sg - Fill PCI IDE PRD table
483 * @qc: Metadata associated with taskfile to be transferred
484 *
485 * Fill PCI IDE PRD (scatter-gather) table with segments
486 * associated with the current disk command.
487 * Make sure hardware does not choke on it.
488 *
489 * LOCKING:
490 * spin_lock_irqsave(host lock)
491 *
492 */
493 static void pdc_fill_sg(struct ata_queued_cmd *qc)
494 {
495 struct ata_port *ap = qc->ap;
496 struct scatterlist *sg;
497 const u32 SG_COUNT_ASIC_BUG = 41*4;
498 unsigned int si, idx;
499 u32 len;
500
501 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
502 return;
503
504 idx = 0;
505 for_each_sg(qc->sg, sg, qc->n_elem, si) {
506 u32 addr, offset;
507 u32 sg_len;
508
509 /* determine if physical DMA addr spans 64K boundary.
510 * Note h/w doesn't support 64-bit, so we unconditionally
511 * truncate dma_addr_t to u32.
512 */
513 addr = (u32) sg_dma_address(sg);
514 sg_len = sg_dma_len(sg);
515
516 while (sg_len) {
517 offset = addr & 0xffff;
518 len = sg_len;
519 if ((offset + sg_len) > 0x10000)
520 len = 0x10000 - offset;
521
522 ap->prd[idx].addr = cpu_to_le32(addr);
523 ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
524 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
525
526 idx++;
527 sg_len -= len;
528 addr += len;
529 }
530 }
531
532 len = le32_to_cpu(ap->prd[idx - 1].flags_len);
533
534 if (len > SG_COUNT_ASIC_BUG) {
535 u32 addr;
536
537 VPRINTK("Splitting last PRD.\n");
538
539 addr = le32_to_cpu(ap->prd[idx - 1].addr);
540 ap->prd[idx - 1].flags_len = cpu_to_le32(len - SG_COUNT_ASIC_BUG);
541 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx - 1, addr, SG_COUNT_ASIC_BUG);
542
543 addr = addr + len - SG_COUNT_ASIC_BUG;
544 len = SG_COUNT_ASIC_BUG;
545 ap->prd[idx].addr = cpu_to_le32(addr);
546 ap->prd[idx].flags_len = cpu_to_le32(len);
547 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
548
549 idx++;
550 }
551
552 ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
553 }
554
555 static void pdc_qc_prep(struct ata_queued_cmd *qc)
556 {
557 struct pdc_port_priv *pp = qc->ap->private_data;
558 unsigned int i;
559
560 VPRINTK("ENTER\n");
561
562 switch (qc->tf.protocol) {
563 case ATA_PROT_DMA:
564 pdc_fill_sg(qc);
565 /*FALLTHROUGH*/
566 case ATA_PROT_NODATA:
567 i = pdc_pkt_header(&qc->tf, qc->ap->prd_dma,
568 qc->dev->devno, pp->pkt);
569 if (qc->tf.flags & ATA_TFLAG_LBA48)
570 i = pdc_prep_lba48(&qc->tf, pp->pkt, i);
571 else
572 i = pdc_prep_lba28(&qc->tf, pp->pkt, i);
573 pdc_pkt_footer(&qc->tf, pp->pkt, i);
574 break;
575 case ATAPI_PROT_PIO:
576 pdc_fill_sg(qc);
577 break;
578 case ATAPI_PROT_DMA:
579 pdc_fill_sg(qc);
580 /*FALLTHROUGH*/
581 case ATAPI_PROT_NODATA:
582 pdc_atapi_pkt(qc);
583 break;
584 default:
585 break;
586 }
587 }
588
589 static int pdc_is_sataii_tx4(unsigned long flags)
590 {
591 const unsigned long mask = PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS;
592 return (flags & mask) == mask;
593 }
594
595 static unsigned int pdc_port_no_to_ata_no(unsigned int port_no,
596 int is_sataii_tx4)
597 {
598 static const unsigned char sataii_tx4_port_remap[4] = { 3, 1, 0, 2};
599 return is_sataii_tx4 ? sataii_tx4_port_remap[port_no] : port_no;
600 }
601
602 static unsigned int pdc_sata_nr_ports(const struct ata_port *ap)
603 {
604 return (ap->flags & PDC_FLAG_4_PORTS) ? 4 : 2;
605 }
606
607 static unsigned int pdc_sata_ata_port_to_ata_no(const struct ata_port *ap)
608 {
609 const struct ata_host *host = ap->host;
610 unsigned int nr_ports = pdc_sata_nr_ports(ap);
611 unsigned int i;
612
613 for (i = 0; i < nr_ports && host->ports[i] != ap; ++i)
614 ;
615 BUG_ON(i >= nr_ports);
616 return pdc_port_no_to_ata_no(i, pdc_is_sataii_tx4(ap->flags));
617 }
618
619 static unsigned int pdc_sata_hotplug_offset(const struct ata_port *ap)
620 {
621 return (ap->flags & PDC_FLAG_GEN_II) ? PDC2_SATA_PLUG_CSR : PDC_SATA_PLUG_CSR;
622 }
623
624 static void pdc_freeze(struct ata_port *ap)
625 {
626 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
627 u32 tmp;
628
629 tmp = readl(ata_mmio + PDC_CTLSTAT);
630 tmp |= PDC_IRQ_DISABLE;
631 tmp &= ~PDC_DMA_ENABLE;
632 writel(tmp, ata_mmio + PDC_CTLSTAT);
633 readl(ata_mmio + PDC_CTLSTAT); /* flush */
634 }
635
636 static void pdc_sata_freeze(struct ata_port *ap)
637 {
638 struct ata_host *host = ap->host;
639 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
640 unsigned int hotplug_offset = pdc_sata_hotplug_offset(ap);
641 unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap);
642 u32 hotplug_status;
643
644 /* Disable hotplug events on this port.
645 *
646 * Locking:
647 * 1) hotplug register accesses must be serialised via host->lock
648 * 2) ap->lock == &ap->host->lock
649 * 3) ->freeze() and ->thaw() are called with ap->lock held
650 */
651 hotplug_status = readl(host_mmio + hotplug_offset);
652 hotplug_status |= 0x11 << (ata_no + 16);
653 writel(hotplug_status, host_mmio + hotplug_offset);
654 readl(host_mmio + hotplug_offset); /* flush */
655
656 pdc_freeze(ap);
657 }
658
659 static void pdc_thaw(struct ata_port *ap)
660 {
661 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
662 u32 tmp;
663
664 /* clear IRQ */
665 readl(ata_mmio + PDC_COMMAND);
666
667 /* turn IRQ back on */
668 tmp = readl(ata_mmio + PDC_CTLSTAT);
669 tmp &= ~PDC_IRQ_DISABLE;
670 writel(tmp, ata_mmio + PDC_CTLSTAT);
671 readl(ata_mmio + PDC_CTLSTAT); /* flush */
672 }
673
674 static void pdc_sata_thaw(struct ata_port *ap)
675 {
676 struct ata_host *host = ap->host;
677 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
678 unsigned int hotplug_offset = pdc_sata_hotplug_offset(ap);
679 unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap);
680 u32 hotplug_status;
681
682 pdc_thaw(ap);
683
684 /* Enable hotplug events on this port.
685 * Locking: see pdc_sata_freeze().
686 */
687 hotplug_status = readl(host_mmio + hotplug_offset);
688 hotplug_status |= 0x11 << ata_no;
689 hotplug_status &= ~(0x11 << (ata_no + 16));
690 writel(hotplug_status, host_mmio + hotplug_offset);
691 readl(host_mmio + hotplug_offset); /* flush */
692 }
693
694 static void pdc_error_handler(struct ata_port *ap)
695 {
696 if (!(ap->pflags & ATA_PFLAG_FROZEN))
697 pdc_reset_port(ap);
698
699 ata_std_error_handler(ap);
700 }
701
702 static void pdc_post_internal_cmd(struct ata_queued_cmd *qc)
703 {
704 struct ata_port *ap = qc->ap;
705
706 /* make DMA engine forget about the failed command */
707 if (qc->flags & ATA_QCFLAG_FAILED)
708 pdc_reset_port(ap);
709 }
710
711 static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc,
712 u32 port_status, u32 err_mask)
713 {
714 struct ata_eh_info *ehi = &ap->link.eh_info;
715 unsigned int ac_err_mask = 0;
716
717 ata_ehi_clear_desc(ehi);
718 ata_ehi_push_desc(ehi, "port_status 0x%08x", port_status);
719 port_status &= err_mask;
720
721 if (port_status & PDC_DRIVE_ERR)
722 ac_err_mask |= AC_ERR_DEV;
723 if (port_status & (PDC_OVERRUN_ERR | PDC_UNDERRUN_ERR))
724 ac_err_mask |= AC_ERR_HSM;
725 if (port_status & (PDC2_ATA_HBA_ERR | PDC2_ATA_DMA_CNT_ERR))
726 ac_err_mask |= AC_ERR_ATA_BUS;
727 if (port_status & (PDC_PH_ERR | PDC_SH_ERR | PDC_DH_ERR | PDC2_HTO_ERR
728 | PDC_PCI_SYS_ERR | PDC1_PCI_PARITY_ERR))
729 ac_err_mask |= AC_ERR_HOST_BUS;
730
731 if (sata_scr_valid(&ap->link)) {
732 u32 serror;
733
734 pdc_sata_scr_read(ap, SCR_ERROR, &serror);
735 ehi->serror |= serror;
736 }
737
738 qc->err_mask |= ac_err_mask;
739
740 pdc_reset_port(ap);
741
742 ata_port_abort(ap);
743 }
744
745 static unsigned int pdc_host_intr(struct ata_port *ap,
746 struct ata_queued_cmd *qc)
747 {
748 unsigned int handled = 0;
749 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
750 u32 port_status, err_mask;
751
752 err_mask = PDC_ERR_MASK;
753 if (ap->flags & PDC_FLAG_GEN_II)
754 err_mask &= ~PDC1_ERR_MASK;
755 else
756 err_mask &= ~PDC2_ERR_MASK;
757 port_status = readl(ata_mmio + PDC_GLOBAL_CTL);
758 if (unlikely(port_status & err_mask)) {
759 pdc_error_intr(ap, qc, port_status, err_mask);
760 return 1;
761 }
762
763 switch (qc->tf.protocol) {
764 case ATA_PROT_DMA:
765 case ATA_PROT_NODATA:
766 case ATAPI_PROT_DMA:
767 case ATAPI_PROT_NODATA:
768 qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
769 ata_qc_complete(qc);
770 handled = 1;
771 break;
772 default:
773 ap->stats.idle_irq++;
774 break;
775 }
776
777 return handled;
778 }
779
780 static void pdc_irq_clear(struct ata_port *ap)
781 {
782 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
783
784 readl(ata_mmio + PDC_COMMAND);
785 }
786
787 static irqreturn_t pdc_interrupt(int irq, void *dev_instance)
788 {
789 struct ata_host *host = dev_instance;
790 struct ata_port *ap;
791 u32 mask = 0;
792 unsigned int i, tmp;
793 unsigned int handled = 0;
794 void __iomem *host_mmio;
795 unsigned int hotplug_offset, ata_no;
796 u32 hotplug_status;
797 int is_sataii_tx4;
798
799 VPRINTK("ENTER\n");
800
801 if (!host || !host->iomap[PDC_MMIO_BAR]) {
802 VPRINTK("QUICK EXIT\n");
803 return IRQ_NONE;
804 }
805
806 host_mmio = host->iomap[PDC_MMIO_BAR];
807
808 spin_lock(&host->lock);
809
810 /* read and clear hotplug flags for all ports */
811 if (host->ports[0]->flags & PDC_FLAG_GEN_II)
812 hotplug_offset = PDC2_SATA_PLUG_CSR;
813 else
814 hotplug_offset = PDC_SATA_PLUG_CSR;
815 hotplug_status = readl(host_mmio + hotplug_offset);
816 if (hotplug_status & 0xff)
817 writel(hotplug_status | 0xff, host_mmio + hotplug_offset);
818 hotplug_status &= 0xff; /* clear uninteresting bits */
819
820 /* reading should also clear interrupts */
821 mask = readl(host_mmio + PDC_INT_SEQMASK);
822
823 if (mask == 0xffffffff && hotplug_status == 0) {
824 VPRINTK("QUICK EXIT 2\n");
825 goto done_irq;
826 }
827
828 mask &= 0xffff; /* only 16 SEQIDs possible */
829 if (mask == 0 && hotplug_status == 0) {
830 VPRINTK("QUICK EXIT 3\n");
831 goto done_irq;
832 }
833
834 writel(mask, host_mmio + PDC_INT_SEQMASK);
835
836 is_sataii_tx4 = pdc_is_sataii_tx4(host->ports[0]->flags);
837
838 for (i = 0; i < host->n_ports; i++) {
839 VPRINTK("port %u\n", i);
840 ap = host->ports[i];
841
842 /* check for a plug or unplug event */
843 ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
844 tmp = hotplug_status & (0x11 << ata_no);
845 if (tmp && ap &&
846 !(ap->flags & ATA_FLAG_DISABLED)) {
847 struct ata_eh_info *ehi = &ap->link.eh_info;
848 ata_ehi_clear_desc(ehi);
849 ata_ehi_hotplugged(ehi);
850 ata_ehi_push_desc(ehi, "hotplug_status %#x", tmp);
851 ata_port_freeze(ap);
852 ++handled;
853 continue;
854 }
855
856 /* check for a packet interrupt */
857 tmp = mask & (1 << (i + 1));
858 if (tmp && ap &&
859 !(ap->flags & ATA_FLAG_DISABLED)) {
860 struct ata_queued_cmd *qc;
861
862 qc = ata_qc_from_tag(ap, ap->link.active_tag);
863 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
864 handled += pdc_host_intr(ap, qc);
865 }
866 }
867
868 VPRINTK("EXIT\n");
869
870 done_irq:
871 spin_unlock(&host->lock);
872 return IRQ_RETVAL(handled);
873 }
874
875 static void pdc_packet_start(struct ata_queued_cmd *qc)
876 {
877 struct ata_port *ap = qc->ap;
878 struct pdc_port_priv *pp = ap->private_data;
879 void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR];
880 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
881 unsigned int port_no = ap->port_no;
882 u8 seq = (u8) (port_no + 1);
883
884 VPRINTK("ENTER, ap %p\n", ap);
885
886 writel(0x00000001, host_mmio + (seq * 4));
887 readl(host_mmio + (seq * 4)); /* flush */
888
889 pp->pkt[2] = seq;
890 wmb(); /* flush PRD, pkt writes */
891 writel(pp->pkt_dma, ata_mmio + PDC_PKT_SUBMIT);
892 readl(ata_mmio + PDC_PKT_SUBMIT); /* flush */
893 }
894
895 static unsigned int pdc_qc_issue(struct ata_queued_cmd *qc)
896 {
897 switch (qc->tf.protocol) {
898 case ATAPI_PROT_NODATA:
899 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
900 break;
901 /*FALLTHROUGH*/
902 case ATA_PROT_NODATA:
903 if (qc->tf.flags & ATA_TFLAG_POLLING)
904 break;
905 /*FALLTHROUGH*/
906 case ATAPI_PROT_DMA:
907 case ATA_PROT_DMA:
908 pdc_packet_start(qc);
909 return 0;
910 default:
911 break;
912 }
913 return ata_sff_qc_issue(qc);
914 }
915
916 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
917 {
918 WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA);
919 ata_sff_tf_load(ap, tf);
920 }
921
922 static void pdc_exec_command_mmio(struct ata_port *ap,
923 const struct ata_taskfile *tf)
924 {
925 WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA);
926 ata_sff_exec_command(ap, tf);
927 }
928
929 static int pdc_check_atapi_dma(struct ata_queued_cmd *qc)
930 {
931 u8 *scsicmd = qc->scsicmd->cmnd;
932 int pio = 1; /* atapi dma off by default */
933
934 /* Whitelist commands that may use DMA. */
935 switch (scsicmd[0]) {
936 case WRITE_12:
937 case WRITE_10:
938 case WRITE_6:
939 case READ_12:
940 case READ_10:
941 case READ_6:
942 case 0xad: /* READ_DVD_STRUCTURE */
943 case 0xbe: /* READ_CD */
944 pio = 0;
945 }
946 /* -45150 (FFFF4FA2) to -1 (FFFFFFFF) shall use PIO mode */
947 if (scsicmd[0] == WRITE_10) {
948 unsigned int lba =
949 (scsicmd[2] << 24) |
950 (scsicmd[3] << 16) |
951 (scsicmd[4] << 8) |
952 scsicmd[5];
953 if (lba >= 0xFFFF4FA2)
954 pio = 1;
955 }
956 return pio;
957 }
958
959 static int pdc_old_sata_check_atapi_dma(struct ata_queued_cmd *qc)
960 {
961 /* First generation chips cannot use ATAPI DMA on SATA ports */
962 return 1;
963 }
964
965 static void pdc_ata_setup_port(struct ata_port *ap,
966 void __iomem *base, void __iomem *scr_addr)
967 {
968 ap->ioaddr.cmd_addr = base;
969 ap->ioaddr.data_addr = base;
970 ap->ioaddr.feature_addr =
971 ap->ioaddr.error_addr = base + 0x4;
972 ap->ioaddr.nsect_addr = base + 0x8;
973 ap->ioaddr.lbal_addr = base + 0xc;
974 ap->ioaddr.lbam_addr = base + 0x10;
975 ap->ioaddr.lbah_addr = base + 0x14;
976 ap->ioaddr.device_addr = base + 0x18;
977 ap->ioaddr.command_addr =
978 ap->ioaddr.status_addr = base + 0x1c;
979 ap->ioaddr.altstatus_addr =
980 ap->ioaddr.ctl_addr = base + 0x38;
981 ap->ioaddr.scr_addr = scr_addr;
982 }
983
984 static void pdc_host_init(struct ata_host *host)
985 {
986 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
987 int is_gen2 = host->ports[0]->flags & PDC_FLAG_GEN_II;
988 int hotplug_offset;
989 u32 tmp;
990
991 if (is_gen2)
992 hotplug_offset = PDC2_SATA_PLUG_CSR;
993 else
994 hotplug_offset = PDC_SATA_PLUG_CSR;
995
996 /*
997 * Except for the hotplug stuff, this is voodoo from the
998 * Promise driver. Label this entire section
999 * "TODO: figure out why we do this"
1000 */
1001
1002 /* enable BMR_BURST, maybe change FIFO_SHD to 8 dwords */
1003 tmp = readl(host_mmio + PDC_FLASH_CTL);
1004 tmp |= 0x02000; /* bit 13 (enable bmr burst) */
1005 if (!is_gen2)
1006 tmp |= 0x10000; /* bit 16 (fifo threshold at 8 dw) */
1007 writel(tmp, host_mmio + PDC_FLASH_CTL);
1008
1009 /* clear plug/unplug flags for all ports */
1010 tmp = readl(host_mmio + hotplug_offset);
1011 writel(tmp | 0xff, host_mmio + hotplug_offset);
1012
1013 /* unmask plug/unplug ints */
1014 tmp = readl(host_mmio + hotplug_offset);
1015 writel(tmp & ~0xff0000, host_mmio + hotplug_offset);
1016
1017 /* don't initialise TBG or SLEW on 2nd generation chips */
1018 if (is_gen2)
1019 return;
1020
1021 /* reduce TBG clock to 133 Mhz. */
1022 tmp = readl(host_mmio + PDC_TBG_MODE);
1023 tmp &= ~0x30000; /* clear bit 17, 16*/
1024 tmp |= 0x10000; /* set bit 17:16 = 0:1 */
1025 writel(tmp, host_mmio + PDC_TBG_MODE);
1026
1027 readl(host_mmio + PDC_TBG_MODE); /* flush */
1028 msleep(10);
1029
1030 /* adjust slew rate control register. */
1031 tmp = readl(host_mmio + PDC_SLEW_CTL);
1032 tmp &= 0xFFFFF03F; /* clear bit 11 ~ 6 */
1033 tmp |= 0x00000900; /* set bit 11-9 = 100b , bit 8-6 = 100 */
1034 writel(tmp, host_mmio + PDC_SLEW_CTL);
1035 }
1036
1037 static int pdc_ata_init_one(struct pci_dev *pdev,
1038 const struct pci_device_id *ent)
1039 {
1040 static int printed_version;
1041 const struct ata_port_info *pi = &pdc_port_info[ent->driver_data];
1042 const struct ata_port_info *ppi[PDC_MAX_PORTS];
1043 struct ata_host *host;
1044 void __iomem *host_mmio;
1045 int n_ports, i, rc;
1046 int is_sataii_tx4;
1047
1048 if (!printed_version++)
1049 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1050
1051 /* enable and acquire resources */
1052 rc = pcim_enable_device(pdev);
1053 if (rc)
1054 return rc;
1055
1056 rc = pcim_iomap_regions(pdev, 1 << PDC_MMIO_BAR, DRV_NAME);
1057 if (rc == -EBUSY)
1058 pcim_pin_device(pdev);
1059 if (rc)
1060 return rc;
1061 host_mmio = pcim_iomap_table(pdev)[PDC_MMIO_BAR];
1062
1063 /* determine port configuration and setup host */
1064 n_ports = 2;
1065 if (pi->flags & PDC_FLAG_4_PORTS)
1066 n_ports = 4;
1067 for (i = 0; i < n_ports; i++)
1068 ppi[i] = pi;
1069
1070 if (pi->flags & PDC_FLAG_SATA_PATA) {
1071 u8 tmp = readb(host_mmio + PDC_FLASH_CTL + 1);
1072 if (!(tmp & 0x80))
1073 ppi[n_ports++] = pi + 1;
1074 }
1075
1076 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
1077 if (!host) {
1078 dev_printk(KERN_ERR, &pdev->dev, "failed to allocate host\n");
1079 return -ENOMEM;
1080 }
1081 host->iomap = pcim_iomap_table(pdev);
1082
1083 is_sataii_tx4 = pdc_is_sataii_tx4(pi->flags);
1084 for (i = 0; i < host->n_ports; i++) {
1085 struct ata_port *ap = host->ports[i];
1086 unsigned int ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
1087 unsigned int ata_offset = 0x200 + ata_no * 0x80;
1088 unsigned int scr_offset = 0x400 + ata_no * 0x100;
1089
1090 pdc_ata_setup_port(ap, host_mmio + ata_offset, host_mmio + scr_offset);
1091
1092 ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");
1093 ata_port_pbar_desc(ap, PDC_MMIO_BAR, ata_offset, "ata");
1094 }
1095
1096 /* initialize adapter */
1097 pdc_host_init(host);
1098
1099 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
1100 if (rc)
1101 return rc;
1102 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
1103 if (rc)
1104 return rc;
1105
1106 /* start host, request IRQ and attach */
1107 pci_set_master(pdev);
1108 return ata_host_activate(host, pdev->irq, pdc_interrupt, IRQF_SHARED,
1109 &pdc_ata_sht);
1110 }
1111
1112 static int __init pdc_ata_init(void)
1113 {
1114 return pci_register_driver(&pdc_ata_pci_driver);
1115 }
1116
1117 static void __exit pdc_ata_exit(void)
1118 {
1119 pci_unregister_driver(&pdc_ata_pci_driver);
1120 }
1121
1122 MODULE_AUTHOR("Jeff Garzik");
1123 MODULE_DESCRIPTION("Promise ATA TX2/TX4/TX4000 low-level driver");
1124 MODULE_LICENSE("GPL");
1125 MODULE_DEVICE_TABLE(pci, pdc_ata_pci_tbl);
1126 MODULE_VERSION(DRV_VERSION);
1127
1128 module_init(pdc_ata_init);
1129 module_exit(pdc_ata_exit);
Support for the Chinese Samsung S3C2440 based development boards