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[SCSI] zfcp: Fix deadlock when adding invalid LUN
[linux-2.6/kvm.git] / drivers / ata / sata_sx4.c
blob4d857185f33b2627cdfc43b52cea1b2f9848ecac
1 /*
2 * sata_sx4.c - Promise SATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc.
9 *
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
14 * any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; see the file COPYING. If not, write to
23 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 *
26 * libata documentation is available via 'make {ps|pdf}docs',
27 * as Documentation/DocBook/libata.*
28 *
29 * Hardware documentation available under NDA.
30 *
31 */
32
33 /*
34 Theory of operation
35 -------------------
36
37 The SX4 (PDC20621) chip features a single Host DMA (HDMA) copy
38 engine, DIMM memory, and four ATA engines (one per SATA port).
39 Data is copied to/from DIMM memory by the HDMA engine, before
40 handing off to one (or more) of the ATA engines. The ATA
41 engines operate solely on DIMM memory.
42
43 The SX4 behaves like a PATA chip, with no SATA controls or
44 knowledge whatsoever, leading to the presumption that
45 PATA<->SATA bridges exist on SX4 boards, external to the
46 PDC20621 chip itself.
47
48 The chip is quite capable, supporting an XOR engine and linked
49 hardware commands (permits a string to transactions to be
50 submitted and waited-on as a single unit), and an optional
51 microprocessor.
52
53 The limiting factor is largely software. This Linux driver was
54 written to multiplex the single HDMA engine to copy disk
55 transactions into a fixed DIMM memory space, from where an ATA
56 engine takes over. As a result, each WRITE looks like this:
57
58 submit HDMA packet to hardware
59 hardware copies data from system memory to DIMM
60 hardware raises interrupt
61
62 submit ATA packet to hardware
63 hardware executes ATA WRITE command, w/ data in DIMM
64 hardware raises interrupt
65
66 and each READ looks like this:
67
68 submit ATA packet to hardware
69 hardware executes ATA READ command, w/ data in DIMM
70 hardware raises interrupt
71
72 submit HDMA packet to hardware
73 hardware copies data from DIMM to system memory
74 hardware raises interrupt
75
76 This is a very slow, lock-step way of doing things that can
77 certainly be improved by motivated kernel hackers.
78
79 */
80
81 #include <linux/kernel.h>
82 #include <linux/module.h>
83 #include <linux/pci.h>
84 #include <linux/init.h>
85 #include <linux/blkdev.h>
86 #include <linux/delay.h>
87 #include <linux/interrupt.h>
88 #include <linux/device.h>
89 #include <scsi/scsi_host.h>
90 #include <scsi/scsi_cmnd.h>
91 #include <linux/libata.h>
92 #include "sata_promise.h"
93
94 #define DRV_NAME "sata_sx4"
95 #define DRV_VERSION "0.12"
96
97
98 enum {
99 PDC_MMIO_BAR = 3,
100 PDC_DIMM_BAR = 4,
101
102 PDC_PRD_TBL = 0x44, /* Direct command DMA table addr */
103
104 PDC_PKT_SUBMIT = 0x40, /* Command packet pointer addr */
105 PDC_HDMA_PKT_SUBMIT = 0x100, /* Host DMA packet pointer addr */
106 PDC_INT_SEQMASK = 0x40, /* Mask of asserted SEQ INTs */
107 PDC_HDMA_CTLSTAT = 0x12C, /* Host DMA control / status */
108
109 PDC_CTLSTAT = 0x60, /* IDEn control / status */
110
111 PDC_20621_SEQCTL = 0x400,
112 PDC_20621_SEQMASK = 0x480,
113 PDC_20621_GENERAL_CTL = 0x484,
114 PDC_20621_PAGE_SIZE = (32 * 1024),
115
116 /* chosen, not constant, values; we design our own DIMM mem map */
117 PDC_20621_DIMM_WINDOW = 0x0C, /* page# for 32K DIMM window */
118 PDC_20621_DIMM_BASE = 0x00200000,
119 PDC_20621_DIMM_DATA = (64 * 1024),
120 PDC_DIMM_DATA_STEP = (256 * 1024),
121 PDC_DIMM_WINDOW_STEP = (8 * 1024),
122 PDC_DIMM_HOST_PRD = (6 * 1024),
123 PDC_DIMM_HOST_PKT = (128 * 0),
124 PDC_DIMM_HPKT_PRD = (128 * 1),
125 PDC_DIMM_ATA_PKT = (128 * 2),
126 PDC_DIMM_APKT_PRD = (128 * 3),
127 PDC_DIMM_HEADER_SZ = PDC_DIMM_APKT_PRD + 128,
128 PDC_PAGE_WINDOW = 0x40,
129 PDC_PAGE_DATA = PDC_PAGE_WINDOW +
130 (PDC_20621_DIMM_DATA / PDC_20621_PAGE_SIZE),
131 PDC_PAGE_SET = PDC_DIMM_DATA_STEP / PDC_20621_PAGE_SIZE,
132
133 PDC_CHIP0_OFS = 0xC0000, /* offset of chip #0 */
134
135 PDC_20621_ERR_MASK = (1<<19) | (1<<20) | (1<<21) | (1<<22) |
136 (1<<23),
137
138 board_20621 = 0, /* FastTrak S150 SX4 */
139
140 PDC_MASK_INT = (1 << 10), /* HDMA/ATA mask int */
141 PDC_RESET = (1 << 11), /* HDMA/ATA reset */
142 PDC_DMA_ENABLE = (1 << 7), /* DMA start/stop */
143
144 PDC_MAX_HDMA = 32,
145 PDC_HDMA_Q_MASK = (PDC_MAX_HDMA - 1),
146
147 PDC_DIMM0_SPD_DEV_ADDRESS = 0x50,
148 PDC_DIMM1_SPD_DEV_ADDRESS = 0x51,
149 PDC_I2C_CONTROL = 0x48,
150 PDC_I2C_ADDR_DATA = 0x4C,
151 PDC_DIMM0_CONTROL = 0x80,
152 PDC_DIMM1_CONTROL = 0x84,
153 PDC_SDRAM_CONTROL = 0x88,
154 PDC_I2C_WRITE = 0, /* master -> slave */
155 PDC_I2C_READ = (1 << 6), /* master <- slave */
156 PDC_I2C_START = (1 << 7), /* start I2C proto */
157 PDC_I2C_MASK_INT = (1 << 5), /* mask I2C interrupt */
158 PDC_I2C_COMPLETE = (1 << 16), /* I2C normal compl. */
159 PDC_I2C_NO_ACK = (1 << 20), /* slave no-ack addr */
160 PDC_DIMM_SPD_SUBADDRESS_START = 0x00,
161 PDC_DIMM_SPD_SUBADDRESS_END = 0x7F,
162 PDC_DIMM_SPD_ROW_NUM = 3,
163 PDC_DIMM_SPD_COLUMN_NUM = 4,
164 PDC_DIMM_SPD_MODULE_ROW = 5,
165 PDC_DIMM_SPD_TYPE = 11,
166 PDC_DIMM_SPD_FRESH_RATE = 12,
167 PDC_DIMM_SPD_BANK_NUM = 17,
168 PDC_DIMM_SPD_CAS_LATENCY = 18,
169 PDC_DIMM_SPD_ATTRIBUTE = 21,
170 PDC_DIMM_SPD_ROW_PRE_CHARGE = 27,
171 PDC_DIMM_SPD_ROW_ACTIVE_DELAY = 28,
172 PDC_DIMM_SPD_RAS_CAS_DELAY = 29,
173 PDC_DIMM_SPD_ACTIVE_PRECHARGE = 30,
174 PDC_DIMM_SPD_SYSTEM_FREQ = 126,
175 PDC_CTL_STATUS = 0x08,
176 PDC_DIMM_WINDOW_CTLR = 0x0C,
177 PDC_TIME_CONTROL = 0x3C,
178 PDC_TIME_PERIOD = 0x40,
179 PDC_TIME_COUNTER = 0x44,
180 PDC_GENERAL_CTLR = 0x484,
181 PCI_PLL_INIT = 0x8A531824,
182 PCI_X_TCOUNT = 0xEE1E5CFF,
183
184 /* PDC_TIME_CONTROL bits */
185 PDC_TIMER_BUZZER = (1 << 10),
186 PDC_TIMER_MODE_PERIODIC = 0, /* bits 9:8 == 00 */
187 PDC_TIMER_MODE_ONCE = (1 << 8), /* bits 9:8 == 01 */
188 PDC_TIMER_ENABLE = (1 << 7),
189 PDC_TIMER_MASK_INT = (1 << 5),
190 PDC_TIMER_SEQ_MASK = 0x1f, /* SEQ ID for timer */
191 PDC_TIMER_DEFAULT = PDC_TIMER_MODE_ONCE |
192 PDC_TIMER_ENABLE |
193 PDC_TIMER_MASK_INT,
194 };
195
196
197 struct pdc_port_priv {
198 u8 dimm_buf[(ATA_PRD_SZ * ATA_MAX_PRD) + 512];
199 u8 *pkt;
200 dma_addr_t pkt_dma;
201 };
202
203 struct pdc_host_priv {
204 unsigned int doing_hdma;
205 unsigned int hdma_prod;
206 unsigned int hdma_cons;
207 struct {
208 struct ata_queued_cmd *qc;
209 unsigned int seq;
210 unsigned long pkt_ofs;
211 } hdma[32];
212 };
213
214
215 static int pdc_sata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
216 static void pdc_eng_timeout(struct ata_port *ap);
217 static void pdc_20621_phy_reset(struct ata_port *ap);
218 static int pdc_port_start(struct ata_port *ap);
219 static void pdc20621_qc_prep(struct ata_queued_cmd *qc);
220 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
221 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
222 static unsigned int pdc20621_dimm_init(struct ata_host *host);
223 static int pdc20621_detect_dimm(struct ata_host *host);
224 static unsigned int pdc20621_i2c_read(struct ata_host *host,
225 u32 device, u32 subaddr, u32 *pdata);
226 static int pdc20621_prog_dimm0(struct ata_host *host);
227 static unsigned int pdc20621_prog_dimm_global(struct ata_host *host);
228 #ifdef ATA_VERBOSE_DEBUG
229 static void pdc20621_get_from_dimm(struct ata_host *host,
230 void *psource, u32 offset, u32 size);
231 #endif
232 static void pdc20621_put_to_dimm(struct ata_host *host,
233 void *psource, u32 offset, u32 size);
234 static void pdc20621_irq_clear(struct ata_port *ap);
235 static unsigned int pdc20621_qc_issue_prot(struct ata_queued_cmd *qc);
236
237
238 static struct scsi_host_template pdc_sata_sht = {
239 .module = THIS_MODULE,
240 .name = DRV_NAME,
241 .ioctl = ata_scsi_ioctl,
242 .queuecommand = ata_scsi_queuecmd,
243 .can_queue = ATA_DEF_QUEUE,
244 .this_id = ATA_SHT_THIS_ID,
245 .sg_tablesize = LIBATA_MAX_PRD,
246 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
247 .emulated = ATA_SHT_EMULATED,
248 .use_clustering = ATA_SHT_USE_CLUSTERING,
249 .proc_name = DRV_NAME,
250 .dma_boundary = ATA_DMA_BOUNDARY,
251 .slave_configure = ata_scsi_slave_config,
252 .slave_destroy = ata_scsi_slave_destroy,
253 .bios_param = ata_std_bios_param,
254 };
255
256 static const struct ata_port_operations pdc_20621_ops = {
257 .tf_load = pdc_tf_load_mmio,
258 .tf_read = ata_tf_read,
259 .check_status = ata_check_status,
260 .exec_command = pdc_exec_command_mmio,
261 .dev_select = ata_std_dev_select,
262 .phy_reset = pdc_20621_phy_reset,
263 .qc_prep = pdc20621_qc_prep,
264 .qc_issue = pdc20621_qc_issue_prot,
265 .data_xfer = ata_data_xfer,
266 .eng_timeout = pdc_eng_timeout,
267 .irq_clear = pdc20621_irq_clear,
268 .irq_on = ata_irq_on,
269 .port_start = pdc_port_start,
270 };
271
272 static const struct ata_port_info pdc_port_info[] = {
273 /* board_20621 */
274 {
275 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
276 ATA_FLAG_SRST | ATA_FLAG_MMIO |
277 ATA_FLAG_NO_ATAPI | ATA_FLAG_PIO_POLLING,
278 .pio_mask = 0x1f, /* pio0-4 */
279 .mwdma_mask = 0x07, /* mwdma0-2 */
280 .udma_mask = ATA_UDMA6,
281 .port_ops = &pdc_20621_ops,
282 },
283
284 };
285
286 static const struct pci_device_id pdc_sata_pci_tbl[] = {
287 { PCI_VDEVICE(PROMISE, 0x6622), board_20621 },
288
289 { } /* terminate list */
290 };
291
292 static struct pci_driver pdc_sata_pci_driver = {
293 .name = DRV_NAME,
294 .id_table = pdc_sata_pci_tbl,
295 .probe = pdc_sata_init_one,
296 .remove = ata_pci_remove_one,
297 };
298
299
300 static int pdc_port_start(struct ata_port *ap)
301 {
302 struct device *dev = ap->host->dev;
303 struct pdc_port_priv *pp;
304 int rc;
305
306 rc = ata_port_start(ap);
307 if (rc)
308 return rc;
309
310 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
311 if (!pp)
312 return -ENOMEM;
313
314 pp->pkt = dmam_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
315 if (!pp->pkt)
316 return -ENOMEM;
317
318 ap->private_data = pp;
319
320 return 0;
321 }
322
323 static void pdc_20621_phy_reset(struct ata_port *ap)
324 {
325 VPRINTK("ENTER\n");
326 ap->cbl = ATA_CBL_SATA;
327 ata_port_probe(ap);
328 ata_bus_reset(ap);
329 }
330
331 static inline void pdc20621_ata_sg(struct ata_taskfile *tf, u8 *buf,
332 unsigned int portno,
333 unsigned int total_len)
334 {
335 u32 addr;
336 unsigned int dw = PDC_DIMM_APKT_PRD >> 2;
337 u32 *buf32 = (u32 *) buf;
338
339 /* output ATA packet S/G table */
340 addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
341 (PDC_DIMM_DATA_STEP * portno);
342 VPRINTK("ATA sg addr 0x%x, %d\n", addr, addr);
343 buf32[dw] = cpu_to_le32(addr);
344 buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
345
346 VPRINTK("ATA PSG @ %x == (0x%x, 0x%x)\n",
347 PDC_20621_DIMM_BASE +
348 (PDC_DIMM_WINDOW_STEP * portno) +
349 PDC_DIMM_APKT_PRD,
350 buf32[dw], buf32[dw + 1]);
351 }
352
353 static inline void pdc20621_host_sg(struct ata_taskfile *tf, u8 *buf,
354 unsigned int portno,
355 unsigned int total_len)
356 {
357 u32 addr;
358 unsigned int dw = PDC_DIMM_HPKT_PRD >> 2;
359 u32 *buf32 = (u32 *) buf;
360
361 /* output Host DMA packet S/G table */
362 addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
363 (PDC_DIMM_DATA_STEP * portno);
364
365 buf32[dw] = cpu_to_le32(addr);
366 buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
367
368 VPRINTK("HOST PSG @ %x == (0x%x, 0x%x)\n",
369 PDC_20621_DIMM_BASE +
370 (PDC_DIMM_WINDOW_STEP * portno) +
371 PDC_DIMM_HPKT_PRD,
372 buf32[dw], buf32[dw + 1]);
373 }
374
375 static inline unsigned int pdc20621_ata_pkt(struct ata_taskfile *tf,
376 unsigned int devno, u8 *buf,
377 unsigned int portno)
378 {
379 unsigned int i, dw;
380 u32 *buf32 = (u32 *) buf;
381 u8 dev_reg;
382
383 unsigned int dimm_sg = PDC_20621_DIMM_BASE +
384 (PDC_DIMM_WINDOW_STEP * portno) +
385 PDC_DIMM_APKT_PRD;
386 VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
387
388 i = PDC_DIMM_ATA_PKT;
389
390 /*
391 * Set up ATA packet
392 */
393 if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
394 buf[i++] = PDC_PKT_READ;
395 else if (tf->protocol == ATA_PROT_NODATA)
396 buf[i++] = PDC_PKT_NODATA;
397 else
398 buf[i++] = 0;
399 buf[i++] = 0; /* reserved */
400 buf[i++] = portno + 1; /* seq. id */
401 buf[i++] = 0xff; /* delay seq. id */
402
403 /* dimm dma S/G, and next-pkt */
404 dw = i >> 2;
405 if (tf->protocol == ATA_PROT_NODATA)
406 buf32[dw] = 0;
407 else
408 buf32[dw] = cpu_to_le32(dimm_sg);
409 buf32[dw + 1] = 0;
410 i += 8;
411
412 if (devno == 0)
413 dev_reg = ATA_DEVICE_OBS;
414 else
415 dev_reg = ATA_DEVICE_OBS | ATA_DEV1;
416
417 /* select device */
418 buf[i++] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE;
419 buf[i++] = dev_reg;
420
421 /* device control register */
422 buf[i++] = (1 << 5) | PDC_REG_DEVCTL;
423 buf[i++] = tf->ctl;
424
425 return i;
426 }
427
428 static inline void pdc20621_host_pkt(struct ata_taskfile *tf, u8 *buf,
429 unsigned int portno)
430 {
431 unsigned int dw;
432 u32 tmp, *buf32 = (u32 *) buf;
433
434 unsigned int host_sg = PDC_20621_DIMM_BASE +
435 (PDC_DIMM_WINDOW_STEP * portno) +
436 PDC_DIMM_HOST_PRD;
437 unsigned int dimm_sg = PDC_20621_DIMM_BASE +
438 (PDC_DIMM_WINDOW_STEP * portno) +
439 PDC_DIMM_HPKT_PRD;
440 VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
441 VPRINTK("host_sg == 0x%x, %d\n", host_sg, host_sg);
442
443 dw = PDC_DIMM_HOST_PKT >> 2;
444
445 /*
446 * Set up Host DMA packet
447 */
448 if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
449 tmp = PDC_PKT_READ;
450 else
451 tmp = 0;
452 tmp |= ((portno + 1 + 4) << 16); /* seq. id */
453 tmp |= (0xff << 24); /* delay seq. id */
454 buf32[dw + 0] = cpu_to_le32(tmp);
455 buf32[dw + 1] = cpu_to_le32(host_sg);
456 buf32[dw + 2] = cpu_to_le32(dimm_sg);
457 buf32[dw + 3] = 0;
458
459 VPRINTK("HOST PKT @ %x == (0x%x 0x%x 0x%x 0x%x)\n",
460 PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * portno) +
461 PDC_DIMM_HOST_PKT,
462 buf32[dw + 0],
463 buf32[dw + 1],
464 buf32[dw + 2],
465 buf32[dw + 3]);
466 }
467
468 static void pdc20621_dma_prep(struct ata_queued_cmd *qc)
469 {
470 struct scatterlist *sg;
471 struct ata_port *ap = qc->ap;
472 struct pdc_port_priv *pp = ap->private_data;
473 void __iomem *mmio = ap->host->iomap[PDC_MMIO_BAR];
474 void __iomem *dimm_mmio = ap->host->iomap[PDC_DIMM_BAR];
475 unsigned int portno = ap->port_no;
476 unsigned int i, idx, total_len = 0, sgt_len;
477 u32 *buf = (u32 *) &pp->dimm_buf[PDC_DIMM_HEADER_SZ];
478
479 WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
480
481 VPRINTK("ata%u: ENTER\n", ap->print_id);
482
483 /* hard-code chip #0 */
484 mmio += PDC_CHIP0_OFS;
485
486 /*
487 * Build S/G table
488 */
489 idx = 0;
490 ata_for_each_sg(sg, qc) {
491 buf[idx++] = cpu_to_le32(sg_dma_address(sg));
492 buf[idx++] = cpu_to_le32(sg_dma_len(sg));
493 total_len += sg_dma_len(sg);
494 }
495 buf[idx - 1] |= cpu_to_le32(ATA_PRD_EOT);
496 sgt_len = idx * 4;
497
498 /*
499 * Build ATA, host DMA packets
500 */
501 pdc20621_host_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
502 pdc20621_host_pkt(&qc->tf, &pp->dimm_buf[0], portno);
503
504 pdc20621_ata_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
505 i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno);
506
507 if (qc->tf.flags & ATA_TFLAG_LBA48)
508 i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i);
509 else
510 i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i);
511
512 pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i);
513
514 /* copy three S/G tables and two packets to DIMM MMIO window */
515 memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP),
516 &pp->dimm_buf, PDC_DIMM_HEADER_SZ);
517 memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP) +
518 PDC_DIMM_HOST_PRD,
519 &pp->dimm_buf[PDC_DIMM_HEADER_SZ], sgt_len);
520
521 /* force host FIFO dump */
522 writel(0x00000001, mmio + PDC_20621_GENERAL_CTL);
523
524 readl(dimm_mmio); /* MMIO PCI posting flush */
525
526 VPRINTK("ata pkt buf ofs %u, prd size %u, mmio copied\n", i, sgt_len);
527 }
528
529 static void pdc20621_nodata_prep(struct ata_queued_cmd *qc)
530 {
531 struct ata_port *ap = qc->ap;
532 struct pdc_port_priv *pp = ap->private_data;
533 void __iomem *mmio = ap->host->iomap[PDC_MMIO_BAR];
534 void __iomem *dimm_mmio = ap->host->iomap[PDC_DIMM_BAR];
535 unsigned int portno = ap->port_no;
536 unsigned int i;
537
538 VPRINTK("ata%u: ENTER\n", ap->print_id);
539
540 /* hard-code chip #0 */
541 mmio += PDC_CHIP0_OFS;
542
543 i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno);
544
545 if (qc->tf.flags & ATA_TFLAG_LBA48)
546 i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i);
547 else
548 i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i);
549
550 pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i);
551
552 /* copy three S/G tables and two packets to DIMM MMIO window */
553 memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP),
554 &pp->dimm_buf, PDC_DIMM_HEADER_SZ);
555
556 /* force host FIFO dump */
557 writel(0x00000001, mmio + PDC_20621_GENERAL_CTL);
558
559 readl(dimm_mmio); /* MMIO PCI posting flush */
560
561 VPRINTK("ata pkt buf ofs %u, mmio copied\n", i);
562 }
563
564 static void pdc20621_qc_prep(struct ata_queued_cmd *qc)
565 {
566 switch (qc->tf.protocol) {
567 case ATA_PROT_DMA:
568 pdc20621_dma_prep(qc);
569 break;
570 case ATA_PROT_NODATA:
571 pdc20621_nodata_prep(qc);
572 break;
573 default:
574 break;
575 }
576 }
577
578 static void __pdc20621_push_hdma(struct ata_queued_cmd *qc,
579 unsigned int seq,
580 u32 pkt_ofs)
581 {
582 struct ata_port *ap = qc->ap;
583 struct ata_host *host = ap->host;
584 void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
585
586 /* hard-code chip #0 */
587 mmio += PDC_CHIP0_OFS;
588
589 writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
590 readl(mmio + PDC_20621_SEQCTL + (seq * 4)); /* flush */
591
592 writel(pkt_ofs, mmio + PDC_HDMA_PKT_SUBMIT);
593 readl(mmio + PDC_HDMA_PKT_SUBMIT); /* flush */
594 }
595
596 static void pdc20621_push_hdma(struct ata_queued_cmd *qc,
597 unsigned int seq,
598 u32 pkt_ofs)
599 {
600 struct ata_port *ap = qc->ap;
601 struct pdc_host_priv *pp = ap->host->private_data;
602 unsigned int idx = pp->hdma_prod & PDC_HDMA_Q_MASK;
603
604 if (!pp->doing_hdma) {
605 __pdc20621_push_hdma(qc, seq, pkt_ofs);
606 pp->doing_hdma = 1;
607 return;
608 }
609
610 pp->hdma[idx].qc = qc;
611 pp->hdma[idx].seq = seq;
612 pp->hdma[idx].pkt_ofs = pkt_ofs;
613 pp->hdma_prod++;
614 }
615
616 static void pdc20621_pop_hdma(struct ata_queued_cmd *qc)
617 {
618 struct ata_port *ap = qc->ap;
619 struct pdc_host_priv *pp = ap->host->private_data;
620 unsigned int idx = pp->hdma_cons & PDC_HDMA_Q_MASK;
621
622 /* if nothing on queue, we're done */
623 if (pp->hdma_prod == pp->hdma_cons) {
624 pp->doing_hdma = 0;
625 return;
626 }
627
628 __pdc20621_push_hdma(pp->hdma[idx].qc, pp->hdma[idx].seq,
629 pp->hdma[idx].pkt_ofs);
630 pp->hdma_cons++;
631 }
632
633 #ifdef ATA_VERBOSE_DEBUG
634 static void pdc20621_dump_hdma(struct ata_queued_cmd *qc)
635 {
636 struct ata_port *ap = qc->ap;
637 unsigned int port_no = ap->port_no;
638 void __iomem *dimm_mmio = ap->host->iomap[PDC_DIMM_BAR];
639
640 dimm_mmio += (port_no * PDC_DIMM_WINDOW_STEP);
641 dimm_mmio += PDC_DIMM_HOST_PKT;
642
643 printk(KERN_ERR "HDMA[0] == 0x%08X\n", readl(dimm_mmio));
644 printk(KERN_ERR "HDMA[1] == 0x%08X\n", readl(dimm_mmio + 4));
645 printk(KERN_ERR "HDMA[2] == 0x%08X\n", readl(dimm_mmio + 8));
646 printk(KERN_ERR "HDMA[3] == 0x%08X\n", readl(dimm_mmio + 12));
647 }
648 #else
649 static inline void pdc20621_dump_hdma(struct ata_queued_cmd *qc) { }
650 #endif /* ATA_VERBOSE_DEBUG */
651
652 static void pdc20621_packet_start(struct ata_queued_cmd *qc)
653 {
654 struct ata_port *ap = qc->ap;
655 struct ata_host *host = ap->host;
656 unsigned int port_no = ap->port_no;
657 void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
658 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
659 u8 seq = (u8) (port_no + 1);
660 unsigned int port_ofs;
661
662 /* hard-code chip #0 */
663 mmio += PDC_CHIP0_OFS;
664
665 VPRINTK("ata%u: ENTER\n", ap->print_id);
666
667 wmb(); /* flush PRD, pkt writes */
668
669 port_ofs = PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
670
671 /* if writing, we (1) DMA to DIMM, then (2) do ATA command */
672 if (rw && qc->tf.protocol == ATA_PROT_DMA) {
673 seq += 4;
674
675 pdc20621_dump_hdma(qc);
676 pdc20621_push_hdma(qc, seq, port_ofs + PDC_DIMM_HOST_PKT);
677 VPRINTK("queued ofs 0x%x (%u), seq %u\n",
678 port_ofs + PDC_DIMM_HOST_PKT,
679 port_ofs + PDC_DIMM_HOST_PKT,
680 seq);
681 } else {
682 writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
683 readl(mmio + PDC_20621_SEQCTL + (seq * 4)); /* flush */
684
685 writel(port_ofs + PDC_DIMM_ATA_PKT,
686 ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
687 readl(ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
688 VPRINTK("submitted ofs 0x%x (%u), seq %u\n",
689 port_ofs + PDC_DIMM_ATA_PKT,
690 port_ofs + PDC_DIMM_ATA_PKT,
691 seq);
692 }
693 }
694
695 static unsigned int pdc20621_qc_issue_prot(struct ata_queued_cmd *qc)
696 {
697 switch (qc->tf.protocol) {
698 case ATA_PROT_DMA:
699 case ATA_PROT_NODATA:
700 pdc20621_packet_start(qc);
701 return 0;
702
703 case ATA_PROT_ATAPI_DMA:
704 BUG();
705 break;
706
707 default:
708 break;
709 }
710
711 return ata_qc_issue_prot(qc);
712 }
713
714 static inline unsigned int pdc20621_host_intr(struct ata_port *ap,
715 struct ata_queued_cmd *qc,
716 unsigned int doing_hdma,
717 void __iomem *mmio)
718 {
719 unsigned int port_no = ap->port_no;
720 unsigned int port_ofs =
721 PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
722 u8 status;
723 unsigned int handled = 0;
724
725 VPRINTK("ENTER\n");
726
727 if ((qc->tf.protocol == ATA_PROT_DMA) && /* read */
728 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
729
730 /* step two - DMA from DIMM to host */
731 if (doing_hdma) {
732 VPRINTK("ata%u: read hdma, 0x%x 0x%x\n", ap->print_id,
733 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
734 /* get drive status; clear intr; complete txn */
735 qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
736 ata_qc_complete(qc);
737 pdc20621_pop_hdma(qc);
738 }
739
740 /* step one - exec ATA command */
741 else {
742 u8 seq = (u8) (port_no + 1 + 4);
743 VPRINTK("ata%u: read ata, 0x%x 0x%x\n", ap->print_id,
744 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
745
746 /* submit hdma pkt */
747 pdc20621_dump_hdma(qc);
748 pdc20621_push_hdma(qc, seq,
749 port_ofs + PDC_DIMM_HOST_PKT);
750 }
751 handled = 1;
752
753 } else if (qc->tf.protocol == ATA_PROT_DMA) { /* write */
754
755 /* step one - DMA from host to DIMM */
756 if (doing_hdma) {
757 u8 seq = (u8) (port_no + 1);
758 VPRINTK("ata%u: write hdma, 0x%x 0x%x\n", ap->print_id,
759 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
760
761 /* submit ata pkt */
762 writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
763 readl(mmio + PDC_20621_SEQCTL + (seq * 4));
764 writel(port_ofs + PDC_DIMM_ATA_PKT,
765 ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
766 readl(ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
767 }
768
769 /* step two - execute ATA command */
770 else {
771 VPRINTK("ata%u: write ata, 0x%x 0x%x\n", ap->print_id,
772 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
773 /* get drive status; clear intr; complete txn */
774 qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
775 ata_qc_complete(qc);
776 pdc20621_pop_hdma(qc);
777 }
778 handled = 1;
779
780 /* command completion, but no data xfer */
781 } else if (qc->tf.protocol == ATA_PROT_NODATA) {
782
783 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
784 DPRINTK("BUS_NODATA (drv_stat 0x%X)\n", status);
785 qc->err_mask |= ac_err_mask(status);
786 ata_qc_complete(qc);
787 handled = 1;
788
789 } else {
790 ap->stats.idle_irq++;
791 }
792
793 return handled;
794 }
795
796 static void pdc20621_irq_clear(struct ata_port *ap)
797 {
798 struct ata_host *host = ap->host;
799 void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
800
801 mmio += PDC_CHIP0_OFS;
802
803 readl(mmio + PDC_20621_SEQMASK);
804 }
805
806 static irqreturn_t pdc20621_interrupt(int irq, void *dev_instance)
807 {
808 struct ata_host *host = dev_instance;
809 struct ata_port *ap;
810 u32 mask = 0;
811 unsigned int i, tmp, port_no;
812 unsigned int handled = 0;
813 void __iomem *mmio_base;
814
815 VPRINTK("ENTER\n");
816
817 if (!host || !host->iomap[PDC_MMIO_BAR]) {
818 VPRINTK("QUICK EXIT\n");
819 return IRQ_NONE;
820 }
821
822 mmio_base = host->iomap[PDC_MMIO_BAR];
823
824 /* reading should also clear interrupts */
825 mmio_base += PDC_CHIP0_OFS;
826 mask = readl(mmio_base + PDC_20621_SEQMASK);
827 VPRINTK("mask == 0x%x\n", mask);
828
829 if (mask == 0xffffffff) {
830 VPRINTK("QUICK EXIT 2\n");
831 return IRQ_NONE;
832 }
833 mask &= 0xffff; /* only 16 tags possible */
834 if (!mask) {
835 VPRINTK("QUICK EXIT 3\n");
836 return IRQ_NONE;
837 }
838
839 spin_lock(&host->lock);
840
841 for (i = 1; i < 9; i++) {
842 port_no = i - 1;
843 if (port_no > 3)
844 port_no -= 4;
845 if (port_no >= host->n_ports)
846 ap = NULL;
847 else
848 ap = host->ports[port_no];
849 tmp = mask & (1 << i);
850 VPRINTK("seq %u, port_no %u, ap %p, tmp %x\n", i, port_no, ap, tmp);
851 if (tmp && ap &&
852 !(ap->flags & ATA_FLAG_DISABLED)) {
853 struct ata_queued_cmd *qc;
854
855 qc = ata_qc_from_tag(ap, ap->link.active_tag);
856 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
857 handled += pdc20621_host_intr(ap, qc, (i > 4),
858 mmio_base);
859 }
860 }
861
862 spin_unlock(&host->lock);
863
864 VPRINTK("mask == 0x%x\n", mask);
865
866 VPRINTK("EXIT\n");
867
868 return IRQ_RETVAL(handled);
869 }
870
871 static void pdc_eng_timeout(struct ata_port *ap)
872 {
873 u8 drv_stat;
874 struct ata_host *host = ap->host;
875 struct ata_queued_cmd *qc;
876 unsigned long flags;
877
878 DPRINTK("ENTER\n");
879
880 spin_lock_irqsave(&host->lock, flags);
881
882 qc = ata_qc_from_tag(ap, ap->link.active_tag);
883
884 switch (qc->tf.protocol) {
885 case ATA_PROT_DMA:
886 case ATA_PROT_NODATA:
887 ata_port_printk(ap, KERN_ERR, "command timeout\n");
888 qc->err_mask |= __ac_err_mask(ata_wait_idle(ap));
889 break;
890
891 default:
892 drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
893
894 ata_port_printk(ap, KERN_ERR,
895 "unknown timeout, cmd 0x%x stat 0x%x\n",
896 qc->tf.command, drv_stat);
897
898 qc->err_mask |= ac_err_mask(drv_stat);
899 break;
900 }
901
902 spin_unlock_irqrestore(&host->lock, flags);
903 ata_eh_qc_complete(qc);
904 DPRINTK("EXIT\n");
905 }
906
907 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
908 {
909 WARN_ON(tf->protocol == ATA_PROT_DMA ||
910 tf->protocol == ATA_PROT_NODATA);
911 ata_tf_load(ap, tf);
912 }
913
914
915 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
916 {
917 WARN_ON(tf->protocol == ATA_PROT_DMA ||
918 tf->protocol == ATA_PROT_NODATA);
919 ata_exec_command(ap, tf);
920 }
921
922
923 static void pdc_sata_setup_port(struct ata_ioports *port, void __iomem *base)
924 {
925 port->cmd_addr = base;
926 port->data_addr = base;
927 port->feature_addr =
928 port->error_addr = base + 0x4;
929 port->nsect_addr = base + 0x8;
930 port->lbal_addr = base + 0xc;
931 port->lbam_addr = base + 0x10;
932 port->lbah_addr = base + 0x14;
933 port->device_addr = base + 0x18;
934 port->command_addr =
935 port->status_addr = base + 0x1c;
936 port->altstatus_addr =
937 port->ctl_addr = base + 0x38;
938 }
939
940
941 #ifdef ATA_VERBOSE_DEBUG
942 static void pdc20621_get_from_dimm(struct ata_host *host, void *psource,
943 u32 offset, u32 size)
944 {
945 u32 window_size;
946 u16 idx;
947 u8 page_mask;
948 long dist;
949 void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
950 void __iomem *dimm_mmio = host->iomap[PDC_DIMM_BAR];
951
952 /* hard-code chip #0 */
953 mmio += PDC_CHIP0_OFS;
954
955 page_mask = 0x00;
956 window_size = 0x2000 * 4; /* 32K byte uchar size */
957 idx = (u16) (offset / window_size);
958
959 writel(0x01, mmio + PDC_GENERAL_CTLR);
960 readl(mmio + PDC_GENERAL_CTLR);
961 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
962 readl(mmio + PDC_DIMM_WINDOW_CTLR);
963
964 offset -= (idx * window_size);
965 idx++;
966 dist = ((long) (window_size - (offset + size))) >= 0 ? size :
967 (long) (window_size - offset);
968 memcpy_fromio((char *) psource, (char *) (dimm_mmio + offset / 4),
969 dist);
970
971 psource += dist;
972 size -= dist;
973 for (; (long) size >= (long) window_size ;) {
974 writel(0x01, mmio + PDC_GENERAL_CTLR);
975 readl(mmio + PDC_GENERAL_CTLR);
976 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
977 readl(mmio + PDC_DIMM_WINDOW_CTLR);
978 memcpy_fromio((char *) psource, (char *) (dimm_mmio),
979 window_size / 4);
980 psource += window_size;
981 size -= window_size;
982 idx++;
983 }
984
985 if (size) {
986 writel(0x01, mmio + PDC_GENERAL_CTLR);
987 readl(mmio + PDC_GENERAL_CTLR);
988 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
989 readl(mmio + PDC_DIMM_WINDOW_CTLR);
990 memcpy_fromio((char *) psource, (char *) (dimm_mmio),
991 size / 4);
992 }
993 }
994 #endif
995
996
997 static void pdc20621_put_to_dimm(struct ata_host *host, void *psource,
998 u32 offset, u32 size)
999 {
1000 u32 window_size;
1001 u16 idx;
1002 u8 page_mask;
1003 long dist;
1004 void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
1005 void __iomem *dimm_mmio = host->iomap[PDC_DIMM_BAR];
1006
1007 /* hard-code chip #0 */
1008 mmio += PDC_CHIP0_OFS;
1009
1010 page_mask = 0x00;
1011 window_size = 0x2000 * 4; /* 32K byte uchar size */
1012 idx = (u16) (offset / window_size);
1013
1014 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1015 readl(mmio + PDC_DIMM_WINDOW_CTLR);
1016 offset -= (idx * window_size);
1017 idx++;
1018 dist = ((long)(s32)(window_size - (offset + size))) >= 0 ? size :
1019 (long) (window_size - offset);
1020 memcpy_toio(dimm_mmio + offset / 4, psource, dist);
1021 writel(0x01, mmio + PDC_GENERAL_CTLR);
1022 readl(mmio + PDC_GENERAL_CTLR);
1023
1024 psource += dist;
1025 size -= dist;
1026 for (; (long) size >= (long) window_size ;) {
1027 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1028 readl(mmio + PDC_DIMM_WINDOW_CTLR);
1029 memcpy_toio(dimm_mmio, psource, window_size / 4);
1030 writel(0x01, mmio + PDC_GENERAL_CTLR);
1031 readl(mmio + PDC_GENERAL_CTLR);
1032 psource += window_size;
1033 size -= window_size;
1034 idx++;
1035 }
1036
1037 if (size) {
1038 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1039 readl(mmio + PDC_DIMM_WINDOW_CTLR);
1040 memcpy_toio(dimm_mmio, psource, size / 4);
1041 writel(0x01, mmio + PDC_GENERAL_CTLR);
1042 readl(mmio + PDC_GENERAL_CTLR);
1043 }
1044 }
1045
1046
1047 static unsigned int pdc20621_i2c_read(struct ata_host *host, u32 device,
1048 u32 subaddr, u32 *pdata)
1049 {
1050 void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
1051 u32 i2creg = 0;
1052 u32 status;
1053 u32 count = 0;
1054
1055 /* hard-code chip #0 */
1056 mmio += PDC_CHIP0_OFS;
1057
1058 i2creg |= device << 24;
1059 i2creg |= subaddr << 16;
1060
1061 /* Set the device and subaddress */
1062 writel(i2creg, mmio + PDC_I2C_ADDR_DATA);
1063 readl(mmio + PDC_I2C_ADDR_DATA);
1064
1065 /* Write Control to perform read operation, mask int */
1066 writel(PDC_I2C_READ | PDC_I2C_START | PDC_I2C_MASK_INT,
1067 mmio + PDC_I2C_CONTROL);
1068
1069 for (count = 0; count <= 1000; count ++) {
1070 status = readl(mmio + PDC_I2C_CONTROL);
1071 if (status & PDC_I2C_COMPLETE) {
1072 status = readl(mmio + PDC_I2C_ADDR_DATA);
1073 break;
1074 } else if (count == 1000)
1075 return 0;
1076 }
1077
1078 *pdata = (status >> 8) & 0x000000ff;
1079 return 1;
1080 }
1081
1082
1083 static int pdc20621_detect_dimm(struct ata_host *host)
1084 {
1085 u32 data = 0;
1086 if (pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS,
1087 PDC_DIMM_SPD_SYSTEM_FREQ, &data)) {
1088 if (data == 100)
1089 return 100;
1090 } else
1091 return 0;
1092
1093 if (pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS, 9, &data)) {
1094 if (data <= 0x75)
1095 return 133;
1096 } else
1097 return 0;
1098
1099 return 0;
1100 }
1101
1102
1103 static int pdc20621_prog_dimm0(struct ata_host *host)
1104 {
1105 u32 spd0[50];
1106 u32 data = 0;
1107 int size, i;
1108 u8 bdimmsize;
1109 void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
1110 static const struct {
1111 unsigned int reg;
1112 unsigned int ofs;
1113 } pdc_i2c_read_data [] = {
1114 { PDC_DIMM_SPD_TYPE, 11 },
1115 { PDC_DIMM_SPD_FRESH_RATE, 12 },
1116 { PDC_DIMM_SPD_COLUMN_NUM, 4 },
1117 { PDC_DIMM_SPD_ATTRIBUTE, 21 },
1118 { PDC_DIMM_SPD_ROW_NUM, 3 },
1119 { PDC_DIMM_SPD_BANK_NUM, 17 },
1120 { PDC_DIMM_SPD_MODULE_ROW, 5 },
1121 { PDC_DIMM_SPD_ROW_PRE_CHARGE, 27 },
1122 { PDC_DIMM_SPD_ROW_ACTIVE_DELAY, 28 },
1123 { PDC_DIMM_SPD_RAS_CAS_DELAY, 29 },
1124 { PDC_DIMM_SPD_ACTIVE_PRECHARGE, 30 },
1125 { PDC_DIMM_SPD_CAS_LATENCY, 18 },
1126 };
1127
1128 /* hard-code chip #0 */
1129 mmio += PDC_CHIP0_OFS;
1130
1131 for (i = 0; i < ARRAY_SIZE(pdc_i2c_read_data); i++)
1132 pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS,
1133 pdc_i2c_read_data[i].reg,
1134 &spd0[pdc_i2c_read_data[i].ofs]);
1135
1136 data |= (spd0[4] - 8) | ((spd0[21] != 0) << 3) | ((spd0[3]-11) << 4);
1137 data |= ((spd0[17] / 4) << 6) | ((spd0[5] / 2) << 7) |
1138 ((((spd0[27] + 9) / 10) - 1) << 8) ;
1139 data |= (((((spd0[29] > spd0[28])
1140 ? spd0[29] : spd0[28]) + 9) / 10) - 1) << 10;
1141 data |= ((spd0[30] - spd0[29] + 9) / 10 - 2) << 12;
1142
1143 if (spd0[18] & 0x08)
1144 data |= ((0x03) << 14);
1145 else if (spd0[18] & 0x04)
1146 data |= ((0x02) << 14);
1147 else if (spd0[18] & 0x01)
1148 data |= ((0x01) << 14);
1149 else
1150 data |= (0 << 14);
1151
1152 /*
1153 Calculate the size of bDIMMSize (power of 2) and
1154 merge the DIMM size by program start/end address.
1155 */
1156
1157 bdimmsize = spd0[4] + (spd0[5] / 2) + spd0[3] + (spd0[17] / 2) + 3;
1158 size = (1 << bdimmsize) >> 20; /* size = xxx(MB) */
1159 data |= (((size / 16) - 1) << 16);
1160 data |= (0 << 23);
1161 data |= 8;
1162 writel(data, mmio + PDC_DIMM0_CONTROL);
1163 readl(mmio + PDC_DIMM0_CONTROL);
1164 return size;
1165 }
1166
1167
1168 static unsigned int pdc20621_prog_dimm_global(struct ata_host *host)
1169 {
1170 u32 data, spd0;
1171 int error, i;
1172 void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
1173
1174 /* hard-code chip #0 */
1175 mmio += PDC_CHIP0_OFS;
1176
1177 /*
1178 Set To Default : DIMM Module Global Control Register (0x022259F1)
1179 DIMM Arbitration Disable (bit 20)
1180 DIMM Data/Control Output Driving Selection (bit12 - bit15)
1181 Refresh Enable (bit 17)
1182 */
1183
1184 data = 0x022259F1;
1185 writel(data, mmio + PDC_SDRAM_CONTROL);
1186 readl(mmio + PDC_SDRAM_CONTROL);
1187
1188 /* Turn on for ECC */
1189 pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS,
1190 PDC_DIMM_SPD_TYPE, &spd0);
1191 if (spd0 == 0x02) {
1192 data |= (0x01 << 16);
1193 writel(data, mmio + PDC_SDRAM_CONTROL);
1194 readl(mmio + PDC_SDRAM_CONTROL);
1195 printk(KERN_ERR "Local DIMM ECC Enabled\n");
1196 }
1197
1198 /* DIMM Initialization Select/Enable (bit 18/19) */
1199 data &= (~(1<<18));
1200 data |= (1<<19);
1201 writel(data, mmio + PDC_SDRAM_CONTROL);
1202
1203 error = 1;
1204 for (i = 1; i <= 10; i++) { /* polling ~5 secs */
1205 data = readl(mmio + PDC_SDRAM_CONTROL);
1206 if (!(data & (1<<19))) {
1207 error = 0;
1208 break;
1209 }
1210 msleep(i*100);
1211 }
1212 return error;
1213 }
1214
1215
1216 static unsigned int pdc20621_dimm_init(struct ata_host *host)
1217 {
1218 int speed, size, length;
1219 u32 addr, spd0, pci_status;
1220 u32 tmp = 0;
1221 u32 time_period = 0;
1222 u32 tcount = 0;
1223 u32 ticks = 0;
1224 u32 clock = 0;
1225 u32 fparam = 0;
1226 void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
1227
1228 /* hard-code chip #0 */
1229 mmio += PDC_CHIP0_OFS;
1230
1231 /* Initialize PLL based upon PCI Bus Frequency */
1232
1233 /* Initialize Time Period Register */
1234 writel(0xffffffff, mmio + PDC_TIME_PERIOD);
1235 time_period = readl(mmio + PDC_TIME_PERIOD);
1236 VPRINTK("Time Period Register (0x40): 0x%x\n", time_period);
1237
1238 /* Enable timer */
1239 writel(PDC_TIMER_DEFAULT, mmio + PDC_TIME_CONTROL);
1240 readl(mmio + PDC_TIME_CONTROL);
1241
1242 /* Wait 3 seconds */
1243 msleep(3000);
1244
1245 /*
1246 When timer is enabled, counter is decreased every internal
1247 clock cycle.
1248 */
1249
1250 tcount = readl(mmio + PDC_TIME_COUNTER);
1251 VPRINTK("Time Counter Register (0x44): 0x%x\n", tcount);
1252
1253 /*
1254 If SX4 is on PCI-X bus, after 3 seconds, the timer counter
1255 register should be >= (0xffffffff - 3x10^8).
1256 */
1257 if (tcount >= PCI_X_TCOUNT) {
1258 ticks = (time_period - tcount);
1259 VPRINTK("Num counters 0x%x (%d)\n", ticks, ticks);
1260
1261 clock = (ticks / 300000);
1262 VPRINTK("10 * Internal clk = 0x%x (%d)\n", clock, clock);
1263
1264 clock = (clock * 33);
1265 VPRINTK("10 * Internal clk * 33 = 0x%x (%d)\n", clock, clock);
1266
1267 /* PLL F Param (bit 22:16) */
1268 fparam = (1400000 / clock) - 2;
1269 VPRINTK("PLL F Param: 0x%x (%d)\n", fparam, fparam);
1270
1271 /* OD param = 0x2 (bit 31:30), R param = 0x5 (bit 29:25) */
1272 pci_status = (0x8a001824 | (fparam << 16));
1273 } else
1274 pci_status = PCI_PLL_INIT;
1275
1276 /* Initialize PLL. */
1277 VPRINTK("pci_status: 0x%x\n", pci_status);
1278 writel(pci_status, mmio + PDC_CTL_STATUS);
1279 readl(mmio + PDC_CTL_STATUS);
1280
1281 /*
1282 Read SPD of DIMM by I2C interface,
1283 and program the DIMM Module Controller.
1284 */
1285 if (!(speed = pdc20621_detect_dimm(host))) {
1286 printk(KERN_ERR "Detect Local DIMM Fail\n");
1287 return 1; /* DIMM error */
1288 }
1289 VPRINTK("Local DIMM Speed = %d\n", speed);
1290
1291 /* Programming DIMM0 Module Control Register (index_CID0:80h) */
1292 size = pdc20621_prog_dimm0(host);
1293 VPRINTK("Local DIMM Size = %dMB\n", size);
1294
1295 /* Programming DIMM Module Global Control Register (index_CID0:88h) */
1296 if (pdc20621_prog_dimm_global(host)) {
1297 printk(KERN_ERR "Programming DIMM Module Global Control Register Fail\n");
1298 return 1;
1299 }
1300
1301 #ifdef ATA_VERBOSE_DEBUG
1302 {
1303 u8 test_parttern1[40] =
1304 {0x55,0xAA,'P','r','o','m','i','s','e',' ',
1305 'N','o','t',' ','Y','e','t',' ',
1306 'D','e','f','i','n','e','d',' ',
1307 '1','.','1','0',
1308 '9','8','0','3','1','6','1','2',0,0};
1309 u8 test_parttern2[40] = {0};
1310
1311 pdc20621_put_to_dimm(host, test_parttern2, 0x10040, 40);
1312 pdc20621_put_to_dimm(host, test_parttern2, 0x40, 40);
1313
1314 pdc20621_put_to_dimm(host, test_parttern1, 0x10040, 40);
1315 pdc20621_get_from_dimm(host, test_parttern2, 0x40, 40);
1316 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1317 test_parttern2[1], &(test_parttern2[2]));
1318 pdc20621_get_from_dimm(host, test_parttern2, 0x10040,
1319 40);
1320 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1321 test_parttern2[1], &(test_parttern2[2]));
1322
1323 pdc20621_put_to_dimm(host, test_parttern1, 0x40, 40);
1324 pdc20621_get_from_dimm(host, test_parttern2, 0x40, 40);
1325 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1326 test_parttern2[1], &(test_parttern2[2]));
1327 }
1328 #endif
1329
1330 /* ECC initiliazation. */
1331
1332 pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS,
1333 PDC_DIMM_SPD_TYPE, &spd0);
1334 if (spd0 == 0x02) {
1335 VPRINTK("Start ECC initialization\n");
1336 addr = 0;
1337 length = size * 1024 * 1024;
1338 while (addr < length) {
1339 pdc20621_put_to_dimm(host, (void *) &tmp, addr,
1340 sizeof(u32));
1341 addr += sizeof(u32);
1342 }
1343 VPRINTK("Finish ECC initialization\n");
1344 }
1345 return 0;
1346 }
1347
1348
1349 static void pdc_20621_init(struct ata_host *host)
1350 {
1351 u32 tmp;
1352 void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
1353
1354 /* hard-code chip #0 */
1355 mmio += PDC_CHIP0_OFS;
1356
1357 /*
1358 * Select page 0x40 for our 32k DIMM window
1359 */
1360 tmp = readl(mmio + PDC_20621_DIMM_WINDOW) & 0xffff0000;
1361 tmp |= PDC_PAGE_WINDOW; /* page 40h; arbitrarily selected */
1362 writel(tmp, mmio + PDC_20621_DIMM_WINDOW);
1363
1364 /*
1365 * Reset Host DMA
1366 */
1367 tmp = readl(mmio + PDC_HDMA_CTLSTAT);
1368 tmp |= PDC_RESET;
1369 writel(tmp, mmio + PDC_HDMA_CTLSTAT);
1370 readl(mmio + PDC_HDMA_CTLSTAT); /* flush */
1371
1372 udelay(10);
1373
1374 tmp = readl(mmio + PDC_HDMA_CTLSTAT);
1375 tmp &= ~PDC_RESET;
1376 writel(tmp, mmio + PDC_HDMA_CTLSTAT);
1377 readl(mmio + PDC_HDMA_CTLSTAT); /* flush */
1378 }
1379
1380 static int pdc_sata_init_one(struct pci_dev *pdev,
1381 const struct pci_device_id *ent)
1382 {
1383 static int printed_version;
1384 const struct ata_port_info *ppi[] =
1385 { &pdc_port_info[ent->driver_data], NULL };
1386 struct ata_host *host;
1387 struct pdc_host_priv *hpriv;
1388 int i, rc;
1389
1390 if (!printed_version++)
1391 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1392
1393 /* allocate host */
1394 host = ata_host_alloc_pinfo(&pdev->dev, ppi, 4);
1395 hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
1396 if (!host || !hpriv)
1397 return -ENOMEM;
1398
1399 host->private_data = hpriv;
1400
1401 /* acquire resources and fill host */
1402 rc = pcim_enable_device(pdev);
1403 if (rc)
1404 return rc;
1405
1406 rc = pcim_iomap_regions(pdev, (1 << PDC_MMIO_BAR) | (1 << PDC_DIMM_BAR),
1407 DRV_NAME);
1408 if (rc == -EBUSY)
1409 pcim_pin_device(pdev);
1410 if (rc)
1411 return rc;
1412 host->iomap = pcim_iomap_table(pdev);
1413
1414 for (i = 0; i < 4; i++) {
1415 struct ata_port *ap = host->ports[i];
1416 void __iomem *base = host->iomap[PDC_MMIO_BAR] + PDC_CHIP0_OFS;
1417 unsigned int offset = 0x200 + i * 0x80;
1418
1419 pdc_sata_setup_port(&ap->ioaddr, base + offset);
1420
1421 ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");
1422 ata_port_pbar_desc(ap, PDC_DIMM_BAR, -1, "dimm");
1423 ata_port_pbar_desc(ap, PDC_MMIO_BAR, offset, "port");
1424 }
1425
1426 /* configure and activate */
1427 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
1428 if (rc)
1429 return rc;
1430 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
1431 if (rc)
1432 return rc;
1433
1434 if (pdc20621_dimm_init(host))
1435 return -ENOMEM;
1436 pdc_20621_init(host);
1437
1438 pci_set_master(pdev);
1439 return ata_host_activate(host, pdev->irq, pdc20621_interrupt,
1440 IRQF_SHARED, &pdc_sata_sht);
1441 }
1442
1443
1444 static int __init pdc_sata_init(void)
1445 {
1446 return pci_register_driver(&pdc_sata_pci_driver);
1447 }
1448
1449
1450 static void __exit pdc_sata_exit(void)
1451 {
1452 pci_unregister_driver(&pdc_sata_pci_driver);
1453 }
1454
1455
1456 MODULE_AUTHOR("Jeff Garzik");
1457 MODULE_DESCRIPTION("Promise SATA low-level driver");
1458 MODULE_LICENSE("GPL");
1459 MODULE_DEVICE_TABLE(pci, pdc_sata_pci_tbl);
1460 MODULE_VERSION(DRV_VERSION);
1461
1462 module_init(pdc_sata_init);
1463 module_exit(pdc_sata_exit);
kernel-based virtual machine