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[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / scsi / sata_sx4.c
blob70118650c461e9d5d10ff0c3053ae5b49c6755a0
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 * The contents of this file are subject to the Open
11 * Software License version 1.1 that can be found at
12 * http://www.opensource.org/licenses/osl-1.1.txt and is included herein
13 * by reference.
14 *
15 * Alternatively, the contents of this file may be used under the terms
16 * of the GNU General Public License version 2 (the "GPL") as distributed
17 * in the kernel source COPYING file, in which case the provisions of
18 * the GPL are applicable instead of the above. If you wish to allow
19 * the use of your version of this file only under the terms of the
20 * GPL and not to allow others to use your version of this file under
21 * the OSL, indicate your decision by deleting the provisions above and
22 * replace them with the notice and other provisions required by the GPL.
23 * If you do not delete the provisions above, a recipient may use your
24 * version of this file under either the OSL or the GPL.
25 *
26 */
27
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/init.h>
32 #include <linux/blkdev.h>
33 #include <linux/delay.h>
34 #include <linux/interrupt.h>
35 #include <linux/sched.h>
36 #include "scsi.h"
37 #include <scsi/scsi_host.h>
38 #include <linux/libata.h>
39 #include <asm/io.h>
40 #include "sata_promise.h"
41
42 #define DRV_NAME "sata_sx4"
43 #define DRV_VERSION "0.7"
44
45
46 enum {
47 PDC_PRD_TBL = 0x44, /* Direct command DMA table addr */
48
49 PDC_PKT_SUBMIT = 0x40, /* Command packet pointer addr */
50 PDC_HDMA_PKT_SUBMIT = 0x100, /* Host DMA packet pointer addr */
51 PDC_INT_SEQMASK = 0x40, /* Mask of asserted SEQ INTs */
52 PDC_HDMA_CTLSTAT = 0x12C, /* Host DMA control / status */
53
54 PDC_20621_SEQCTL = 0x400,
55 PDC_20621_SEQMASK = 0x480,
56 PDC_20621_GENERAL_CTL = 0x484,
57 PDC_20621_PAGE_SIZE = (32 * 1024),
58
59 /* chosen, not constant, values; we design our own DIMM mem map */
60 PDC_20621_DIMM_WINDOW = 0x0C, /* page# for 32K DIMM window */
61 PDC_20621_DIMM_BASE = 0x00200000,
62 PDC_20621_DIMM_DATA = (64 * 1024),
63 PDC_DIMM_DATA_STEP = (256 * 1024),
64 PDC_DIMM_WINDOW_STEP = (8 * 1024),
65 PDC_DIMM_HOST_PRD = (6 * 1024),
66 PDC_DIMM_HOST_PKT = (128 * 0),
67 PDC_DIMM_HPKT_PRD = (128 * 1),
68 PDC_DIMM_ATA_PKT = (128 * 2),
69 PDC_DIMM_APKT_PRD = (128 * 3),
70 PDC_DIMM_HEADER_SZ = PDC_DIMM_APKT_PRD + 128,
71 PDC_PAGE_WINDOW = 0x40,
72 PDC_PAGE_DATA = PDC_PAGE_WINDOW +
73 (PDC_20621_DIMM_DATA / PDC_20621_PAGE_SIZE),
74 PDC_PAGE_SET = PDC_DIMM_DATA_STEP / PDC_20621_PAGE_SIZE,
75
76 PDC_CHIP0_OFS = 0xC0000, /* offset of chip #0 */
77
78 PDC_20621_ERR_MASK = (1<<19) | (1<<20) | (1<<21) | (1<<22) |
79 (1<<23),
80
81 board_20621 = 0, /* FastTrak S150 SX4 */
82
83 PDC_RESET = (1 << 11), /* HDMA reset */
84
85 PDC_MAX_HDMA = 32,
86 PDC_HDMA_Q_MASK = (PDC_MAX_HDMA - 1),
87
88 PDC_DIMM0_SPD_DEV_ADDRESS = 0x50,
89 PDC_DIMM1_SPD_DEV_ADDRESS = 0x51,
90 PDC_MAX_DIMM_MODULE = 0x02,
91 PDC_I2C_CONTROL_OFFSET = 0x48,
92 PDC_I2C_ADDR_DATA_OFFSET = 0x4C,
93 PDC_DIMM0_CONTROL_OFFSET = 0x80,
94 PDC_DIMM1_CONTROL_OFFSET = 0x84,
95 PDC_SDRAM_CONTROL_OFFSET = 0x88,
96 PDC_I2C_WRITE = 0x00000000,
97 PDC_I2C_READ = 0x00000040,
98 PDC_I2C_START = 0x00000080,
99 PDC_I2C_MASK_INT = 0x00000020,
100 PDC_I2C_COMPLETE = 0x00010000,
101 PDC_I2C_NO_ACK = 0x00100000,
102 PDC_DIMM_SPD_SUBADDRESS_START = 0x00,
103 PDC_DIMM_SPD_SUBADDRESS_END = 0x7F,
104 PDC_DIMM_SPD_ROW_NUM = 3,
105 PDC_DIMM_SPD_COLUMN_NUM = 4,
106 PDC_DIMM_SPD_MODULE_ROW = 5,
107 PDC_DIMM_SPD_TYPE = 11,
108 PDC_DIMM_SPD_FRESH_RATE = 12,
109 PDC_DIMM_SPD_BANK_NUM = 17,
110 PDC_DIMM_SPD_CAS_LATENCY = 18,
111 PDC_DIMM_SPD_ATTRIBUTE = 21,
112 PDC_DIMM_SPD_ROW_PRE_CHARGE = 27,
113 PDC_DIMM_SPD_ROW_ACTIVE_DELAY = 28,
114 PDC_DIMM_SPD_RAS_CAS_DELAY = 29,
115 PDC_DIMM_SPD_ACTIVE_PRECHARGE = 30,
116 PDC_DIMM_SPD_SYSTEM_FREQ = 126,
117 PDC_CTL_STATUS = 0x08,
118 PDC_DIMM_WINDOW_CTLR = 0x0C,
119 PDC_TIME_CONTROL = 0x3C,
120 PDC_TIME_PERIOD = 0x40,
121 PDC_TIME_COUNTER = 0x44,
122 PDC_GENERAL_CTLR = 0x484,
123 PCI_PLL_INIT = 0x8A531824,
124 PCI_X_TCOUNT = 0xEE1E5CFF
125 };
126
127
128 struct pdc_port_priv {
129 u8 dimm_buf[(ATA_PRD_SZ * ATA_MAX_PRD) + 512];
130 u8 *pkt;
131 dma_addr_t pkt_dma;
132 };
133
134 struct pdc_host_priv {
135 void *dimm_mmio;
136
137 unsigned int doing_hdma;
138 unsigned int hdma_prod;
139 unsigned int hdma_cons;
140 struct {
141 struct ata_queued_cmd *qc;
142 unsigned int seq;
143 unsigned long pkt_ofs;
144 } hdma[32];
145 };
146
147
148 static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
149 static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
150 static void pdc_eng_timeout(struct ata_port *ap);
151 static void pdc_20621_phy_reset (struct ata_port *ap);
152 static int pdc_port_start(struct ata_port *ap);
153 static void pdc_port_stop(struct ata_port *ap);
154 static void pdc20621_qc_prep(struct ata_queued_cmd *qc);
155 static void pdc_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf);
156 static void pdc_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf);
157 static void pdc20621_host_stop(struct ata_host_set *host_set);
158 static unsigned int pdc20621_dimm_init(struct ata_probe_ent *pe);
159 static int pdc20621_detect_dimm(struct ata_probe_ent *pe);
160 static unsigned int pdc20621_i2c_read(struct ata_probe_ent *pe,
161 u32 device, u32 subaddr, u32 *pdata);
162 static int pdc20621_prog_dimm0(struct ata_probe_ent *pe);
163 static unsigned int pdc20621_prog_dimm_global(struct ata_probe_ent *pe);
164 #ifdef ATA_VERBOSE_DEBUG
165 static void pdc20621_get_from_dimm(struct ata_probe_ent *pe,
166 void *psource, u32 offset, u32 size);
167 #endif
168 static void pdc20621_put_to_dimm(struct ata_probe_ent *pe,
169 void *psource, u32 offset, u32 size);
170 static void pdc20621_irq_clear(struct ata_port *ap);
171 static int pdc20621_qc_issue_prot(struct ata_queued_cmd *qc);
172
173
174 static Scsi_Host_Template pdc_sata_sht = {
175 .module = THIS_MODULE,
176 .name = DRV_NAME,
177 .ioctl = ata_scsi_ioctl,
178 .queuecommand = ata_scsi_queuecmd,
179 .eh_strategy_handler = ata_scsi_error,
180 .can_queue = ATA_DEF_QUEUE,
181 .this_id = ATA_SHT_THIS_ID,
182 .sg_tablesize = LIBATA_MAX_PRD,
183 .max_sectors = ATA_MAX_SECTORS,
184 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
185 .emulated = ATA_SHT_EMULATED,
186 .use_clustering = ATA_SHT_USE_CLUSTERING,
187 .proc_name = DRV_NAME,
188 .dma_boundary = ATA_DMA_BOUNDARY,
189 .slave_configure = ata_scsi_slave_config,
190 .bios_param = ata_std_bios_param,
191 .ordered_flush = 1,
192 };
193
194 static struct ata_port_operations pdc_20621_ops = {
195 .port_disable = ata_port_disable,
196 .tf_load = pdc_tf_load_mmio,
197 .tf_read = ata_tf_read,
198 .check_status = ata_check_status,
199 .exec_command = pdc_exec_command_mmio,
200 .dev_select = ata_std_dev_select,
201 .phy_reset = pdc_20621_phy_reset,
202 .qc_prep = pdc20621_qc_prep,
203 .qc_issue = pdc20621_qc_issue_prot,
204 .eng_timeout = pdc_eng_timeout,
205 .irq_handler = pdc20621_interrupt,
206 .irq_clear = pdc20621_irq_clear,
207 .port_start = pdc_port_start,
208 .port_stop = pdc_port_stop,
209 .host_stop = pdc20621_host_stop,
210 };
211
212 static struct ata_port_info pdc_port_info[] = {
213 /* board_20621 */
214 {
215 .sht = &pdc_sata_sht,
216 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
217 ATA_FLAG_SRST | ATA_FLAG_MMIO,
218 .pio_mask = 0x1f, /* pio0-4 */
219 .mwdma_mask = 0x07, /* mwdma0-2 */
220 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
221 .port_ops = &pdc_20621_ops,
222 },
223
224 };
225
226 static struct pci_device_id pdc_sata_pci_tbl[] = {
227 { PCI_VENDOR_ID_PROMISE, 0x6622, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
228 board_20621 },
229 { } /* terminate list */
230 };
231
232
233 static struct pci_driver pdc_sata_pci_driver = {
234 .name = DRV_NAME,
235 .id_table = pdc_sata_pci_tbl,
236 .probe = pdc_sata_init_one,
237 .remove = ata_pci_remove_one,
238 };
239
240
241 static void pdc20621_host_stop(struct ata_host_set *host_set)
242 {
243 struct pdc_host_priv *hpriv = host_set->private_data;
244 void *dimm_mmio = hpriv->dimm_mmio;
245
246 iounmap(dimm_mmio);
247 kfree(hpriv);
248 }
249
250 static int pdc_port_start(struct ata_port *ap)
251 {
252 struct device *dev = ap->host_set->dev;
253 struct pdc_port_priv *pp;
254 int rc;
255
256 rc = ata_port_start(ap);
257 if (rc)
258 return rc;
259
260 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
261 if (!pp) {
262 rc = -ENOMEM;
263 goto err_out;
264 }
265 memset(pp, 0, sizeof(*pp));
266
267 pp->pkt = dma_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
268 if (!pp->pkt) {
269 rc = -ENOMEM;
270 goto err_out_kfree;
271 }
272
273 ap->private_data = pp;
274
275 return 0;
276
277 err_out_kfree:
278 kfree(pp);
279 err_out:
280 ata_port_stop(ap);
281 return rc;
282 }
283
284
285 static void pdc_port_stop(struct ata_port *ap)
286 {
287 struct device *dev = ap->host_set->dev;
288 struct pdc_port_priv *pp = ap->private_data;
289
290 ap->private_data = NULL;
291 dma_free_coherent(dev, 128, pp->pkt, pp->pkt_dma);
292 kfree(pp);
293 ata_port_stop(ap);
294 }
295
296
297 static void pdc_20621_phy_reset (struct ata_port *ap)
298 {
299 VPRINTK("ENTER\n");
300 ap->cbl = ATA_CBL_SATA;
301 ata_port_probe(ap);
302 ata_bus_reset(ap);
303 }
304
305 static inline void pdc20621_ata_sg(struct ata_taskfile *tf, u8 *buf,
306 unsigned int portno,
307 unsigned int total_len)
308 {
309 u32 addr;
310 unsigned int dw = PDC_DIMM_APKT_PRD >> 2;
311 u32 *buf32 = (u32 *) buf;
312
313 /* output ATA packet S/G table */
314 addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
315 (PDC_DIMM_DATA_STEP * portno);
316 VPRINTK("ATA sg addr 0x%x, %d\n", addr, addr);
317 buf32[dw] = cpu_to_le32(addr);
318 buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
319
320 VPRINTK("ATA PSG @ %x == (0x%x, 0x%x)\n",
321 PDC_20621_DIMM_BASE +
322 (PDC_DIMM_WINDOW_STEP * portno) +
323 PDC_DIMM_APKT_PRD,
324 buf32[dw], buf32[dw + 1]);
325 }
326
327 static inline void pdc20621_host_sg(struct ata_taskfile *tf, u8 *buf,
328 unsigned int portno,
329 unsigned int total_len)
330 {
331 u32 addr;
332 unsigned int dw = PDC_DIMM_HPKT_PRD >> 2;
333 u32 *buf32 = (u32 *) buf;
334
335 /* output Host DMA packet S/G table */
336 addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
337 (PDC_DIMM_DATA_STEP * portno);
338
339 buf32[dw] = cpu_to_le32(addr);
340 buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
341
342 VPRINTK("HOST PSG @ %x == (0x%x, 0x%x)\n",
343 PDC_20621_DIMM_BASE +
344 (PDC_DIMM_WINDOW_STEP * portno) +
345 PDC_DIMM_HPKT_PRD,
346 buf32[dw], buf32[dw + 1]);
347 }
348
349 static inline unsigned int pdc20621_ata_pkt(struct ata_taskfile *tf,
350 unsigned int devno, u8 *buf,
351 unsigned int portno)
352 {
353 unsigned int i, dw;
354 u32 *buf32 = (u32 *) buf;
355 u8 dev_reg;
356
357 unsigned int dimm_sg = PDC_20621_DIMM_BASE +
358 (PDC_DIMM_WINDOW_STEP * portno) +
359 PDC_DIMM_APKT_PRD;
360 VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
361
362 i = PDC_DIMM_ATA_PKT;
363
364 /*
365 * Set up ATA packet
366 */
367 if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
368 buf[i++] = PDC_PKT_READ;
369 else if (tf->protocol == ATA_PROT_NODATA)
370 buf[i++] = PDC_PKT_NODATA;
371 else
372 buf[i++] = 0;
373 buf[i++] = 0; /* reserved */
374 buf[i++] = portno + 1; /* seq. id */
375 buf[i++] = 0xff; /* delay seq. id */
376
377 /* dimm dma S/G, and next-pkt */
378 dw = i >> 2;
379 if (tf->protocol == ATA_PROT_NODATA)
380 buf32[dw] = 0;
381 else
382 buf32[dw] = cpu_to_le32(dimm_sg);
383 buf32[dw + 1] = 0;
384 i += 8;
385
386 if (devno == 0)
387 dev_reg = ATA_DEVICE_OBS;
388 else
389 dev_reg = ATA_DEVICE_OBS | ATA_DEV1;
390
391 /* select device */
392 buf[i++] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE;
393 buf[i++] = dev_reg;
394
395 /* device control register */
396 buf[i++] = (1 << 5) | PDC_REG_DEVCTL;
397 buf[i++] = tf->ctl;
398
399 return i;
400 }
401
402 static inline void pdc20621_host_pkt(struct ata_taskfile *tf, u8 *buf,
403 unsigned int portno)
404 {
405 unsigned int dw;
406 u32 tmp, *buf32 = (u32 *) buf;
407
408 unsigned int host_sg = PDC_20621_DIMM_BASE +
409 (PDC_DIMM_WINDOW_STEP * portno) +
410 PDC_DIMM_HOST_PRD;
411 unsigned int dimm_sg = PDC_20621_DIMM_BASE +
412 (PDC_DIMM_WINDOW_STEP * portno) +
413 PDC_DIMM_HPKT_PRD;
414 VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
415 VPRINTK("host_sg == 0x%x, %d\n", host_sg, host_sg);
416
417 dw = PDC_DIMM_HOST_PKT >> 2;
418
419 /*
420 * Set up Host DMA packet
421 */
422 if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
423 tmp = PDC_PKT_READ;
424 else
425 tmp = 0;
426 tmp |= ((portno + 1 + 4) << 16); /* seq. id */
427 tmp |= (0xff << 24); /* delay seq. id */
428 buf32[dw + 0] = cpu_to_le32(tmp);
429 buf32[dw + 1] = cpu_to_le32(host_sg);
430 buf32[dw + 2] = cpu_to_le32(dimm_sg);
431 buf32[dw + 3] = 0;
432
433 VPRINTK("HOST PKT @ %x == (0x%x 0x%x 0x%x 0x%x)\n",
434 PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * portno) +
435 PDC_DIMM_HOST_PKT,
436 buf32[dw + 0],
437 buf32[dw + 1],
438 buf32[dw + 2],
439 buf32[dw + 3]);
440 }
441
442 static void pdc20621_dma_prep(struct ata_queued_cmd *qc)
443 {
444 struct scatterlist *sg = qc->sg;
445 struct ata_port *ap = qc->ap;
446 struct pdc_port_priv *pp = ap->private_data;
447 void *mmio = ap->host_set->mmio_base;
448 struct pdc_host_priv *hpriv = ap->host_set->private_data;
449 void *dimm_mmio = hpriv->dimm_mmio;
450 unsigned int portno = ap->port_no;
451 unsigned int i, last, idx, total_len = 0, sgt_len;
452 u32 *buf = (u32 *) &pp->dimm_buf[PDC_DIMM_HEADER_SZ];
453
454 assert(qc->flags & ATA_QCFLAG_DMAMAP);
455
456 VPRINTK("ata%u: ENTER\n", ap->id);
457
458 /* hard-code chip #0 */
459 mmio += PDC_CHIP0_OFS;
460
461 /*
462 * Build S/G table
463 */
464 last = qc->n_elem;
465 idx = 0;
466 for (i = 0; i < last; i++) {
467 buf[idx++] = cpu_to_le32(sg_dma_address(&sg[i]));
468 buf[idx++] = cpu_to_le32(sg_dma_len(&sg[i]));
469 total_len += sg[i].length;
470 }
471 buf[idx - 1] |= cpu_to_le32(ATA_PRD_EOT);
472 sgt_len = idx * 4;
473
474 /*
475 * Build ATA, host DMA packets
476 */
477 pdc20621_host_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
478 pdc20621_host_pkt(&qc->tf, &pp->dimm_buf[0], portno);
479
480 pdc20621_ata_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
481 i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno);
482
483 if (qc->tf.flags & ATA_TFLAG_LBA48)
484 i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i);
485 else
486 i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i);
487
488 pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i);
489
490 /* copy three S/G tables and two packets to DIMM MMIO window */
491 memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP),
492 &pp->dimm_buf, PDC_DIMM_HEADER_SZ);
493 memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP) +
494 PDC_DIMM_HOST_PRD,
495 &pp->dimm_buf[PDC_DIMM_HEADER_SZ], sgt_len);
496
497 /* force host FIFO dump */
498 writel(0x00000001, mmio + PDC_20621_GENERAL_CTL);
499
500 readl(dimm_mmio); /* MMIO PCI posting flush */
501
502 VPRINTK("ata pkt buf ofs %u, prd size %u, mmio copied\n", i, sgt_len);
503 }
504
505 static void pdc20621_nodata_prep(struct ata_queued_cmd *qc)
506 {
507 struct ata_port *ap = qc->ap;
508 struct pdc_port_priv *pp = ap->private_data;
509 void *mmio = ap->host_set->mmio_base;
510 struct pdc_host_priv *hpriv = ap->host_set->private_data;
511 void *dimm_mmio = hpriv->dimm_mmio;
512 unsigned int portno = ap->port_no;
513 unsigned int i;
514
515 VPRINTK("ata%u: ENTER\n", ap->id);
516
517 /* hard-code chip #0 */
518 mmio += PDC_CHIP0_OFS;
519
520 i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno);
521
522 if (qc->tf.flags & ATA_TFLAG_LBA48)
523 i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i);
524 else
525 i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i);
526
527 pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i);
528
529 /* copy three S/G tables and two packets to DIMM MMIO window */
530 memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP),
531 &pp->dimm_buf, PDC_DIMM_HEADER_SZ);
532
533 /* force host FIFO dump */
534 writel(0x00000001, mmio + PDC_20621_GENERAL_CTL);
535
536 readl(dimm_mmio); /* MMIO PCI posting flush */
537
538 VPRINTK("ata pkt buf ofs %u, mmio copied\n", i);
539 }
540
541 static void pdc20621_qc_prep(struct ata_queued_cmd *qc)
542 {
543 switch (qc->tf.protocol) {
544 case ATA_PROT_DMA:
545 pdc20621_dma_prep(qc);
546 break;
547 case ATA_PROT_NODATA:
548 pdc20621_nodata_prep(qc);
549 break;
550 default:
551 break;
552 }
553 }
554
555 static void __pdc20621_push_hdma(struct ata_queued_cmd *qc,
556 unsigned int seq,
557 u32 pkt_ofs)
558 {
559 struct ata_port *ap = qc->ap;
560 struct ata_host_set *host_set = ap->host_set;
561 void *mmio = host_set->mmio_base;
562
563 /* hard-code chip #0 */
564 mmio += PDC_CHIP0_OFS;
565
566 writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
567 readl(mmio + PDC_20621_SEQCTL + (seq * 4)); /* flush */
568
569 writel(pkt_ofs, mmio + PDC_HDMA_PKT_SUBMIT);
570 readl(mmio + PDC_HDMA_PKT_SUBMIT); /* flush */
571 }
572
573 static void pdc20621_push_hdma(struct ata_queued_cmd *qc,
574 unsigned int seq,
575 u32 pkt_ofs)
576 {
577 struct ata_port *ap = qc->ap;
578 struct pdc_host_priv *pp = ap->host_set->private_data;
579 unsigned int idx = pp->hdma_prod & PDC_HDMA_Q_MASK;
580
581 if (!pp->doing_hdma) {
582 __pdc20621_push_hdma(qc, seq, pkt_ofs);
583 pp->doing_hdma = 1;
584 return;
585 }
586
587 pp->hdma[idx].qc = qc;
588 pp->hdma[idx].seq = seq;
589 pp->hdma[idx].pkt_ofs = pkt_ofs;
590 pp->hdma_prod++;
591 }
592
593 static void pdc20621_pop_hdma(struct ata_queued_cmd *qc)
594 {
595 struct ata_port *ap = qc->ap;
596 struct pdc_host_priv *pp = ap->host_set->private_data;
597 unsigned int idx = pp->hdma_cons & PDC_HDMA_Q_MASK;
598
599 /* if nothing on queue, we're done */
600 if (pp->hdma_prod == pp->hdma_cons) {
601 pp->doing_hdma = 0;
602 return;
603 }
604
605 __pdc20621_push_hdma(pp->hdma[idx].qc, pp->hdma[idx].seq,
606 pp->hdma[idx].pkt_ofs);
607 pp->hdma_cons++;
608 }
609
610 #ifdef ATA_VERBOSE_DEBUG
611 static void pdc20621_dump_hdma(struct ata_queued_cmd *qc)
612 {
613 struct ata_port *ap = qc->ap;
614 unsigned int port_no = ap->port_no;
615 struct pdc_host_priv *hpriv = ap->host_set->private_data;
616 void *dimm_mmio = hpriv->dimm_mmio;
617
618 dimm_mmio += (port_no * PDC_DIMM_WINDOW_STEP);
619 dimm_mmio += PDC_DIMM_HOST_PKT;
620
621 printk(KERN_ERR "HDMA[0] == 0x%08X\n", readl(dimm_mmio));
622 printk(KERN_ERR "HDMA[1] == 0x%08X\n", readl(dimm_mmio + 4));
623 printk(KERN_ERR "HDMA[2] == 0x%08X\n", readl(dimm_mmio + 8));
624 printk(KERN_ERR "HDMA[3] == 0x%08X\n", readl(dimm_mmio + 12));
625 }
626 #else
627 static inline void pdc20621_dump_hdma(struct ata_queued_cmd *qc) { }
628 #endif /* ATA_VERBOSE_DEBUG */
629
630 static void pdc20621_packet_start(struct ata_queued_cmd *qc)
631 {
632 struct ata_port *ap = qc->ap;
633 struct ata_host_set *host_set = ap->host_set;
634 unsigned int port_no = ap->port_no;
635 void *mmio = host_set->mmio_base;
636 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
637 u8 seq = (u8) (port_no + 1);
638 unsigned int port_ofs;
639
640 /* hard-code chip #0 */
641 mmio += PDC_CHIP0_OFS;
642
643 VPRINTK("ata%u: ENTER\n", ap->id);
644
645 wmb(); /* flush PRD, pkt writes */
646
647 port_ofs = PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
648
649 /* if writing, we (1) DMA to DIMM, then (2) do ATA command */
650 if (rw && qc->tf.protocol == ATA_PROT_DMA) {
651 seq += 4;
652
653 pdc20621_dump_hdma(qc);
654 pdc20621_push_hdma(qc, seq, port_ofs + PDC_DIMM_HOST_PKT);
655 VPRINTK("queued ofs 0x%x (%u), seq %u\n",
656 port_ofs + PDC_DIMM_HOST_PKT,
657 port_ofs + PDC_DIMM_HOST_PKT,
658 seq);
659 } else {
660 writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
661 readl(mmio + PDC_20621_SEQCTL + (seq * 4)); /* flush */
662
663 writel(port_ofs + PDC_DIMM_ATA_PKT,
664 (void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
665 readl((void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
666 VPRINTK("submitted ofs 0x%x (%u), seq %u\n",
667 port_ofs + PDC_DIMM_ATA_PKT,
668 port_ofs + PDC_DIMM_ATA_PKT,
669 seq);
670 }
671 }
672
673 static int pdc20621_qc_issue_prot(struct ata_queued_cmd *qc)
674 {
675 switch (qc->tf.protocol) {
676 case ATA_PROT_DMA:
677 case ATA_PROT_NODATA:
678 pdc20621_packet_start(qc);
679 return 0;
680
681 case ATA_PROT_ATAPI_DMA:
682 BUG();
683 break;
684
685 default:
686 break;
687 }
688
689 return ata_qc_issue_prot(qc);
690 }
691
692 static inline unsigned int pdc20621_host_intr( struct ata_port *ap,
693 struct ata_queued_cmd *qc,
694 unsigned int doing_hdma,
695 void *mmio)
696 {
697 unsigned int port_no = ap->port_no;
698 unsigned int port_ofs =
699 PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
700 u8 status;
701 unsigned int handled = 0;
702
703 VPRINTK("ENTER\n");
704
705 if ((qc->tf.protocol == ATA_PROT_DMA) && /* read */
706 (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
707
708 /* step two - DMA from DIMM to host */
709 if (doing_hdma) {
710 VPRINTK("ata%u: read hdma, 0x%x 0x%x\n", ap->id,
711 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
712 /* get drive status; clear intr; complete txn */
713 ata_qc_complete(qc, ata_wait_idle(ap));
714 pdc20621_pop_hdma(qc);
715 }
716
717 /* step one - exec ATA command */
718 else {
719 u8 seq = (u8) (port_no + 1 + 4);
720 VPRINTK("ata%u: read ata, 0x%x 0x%x\n", ap->id,
721 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
722
723 /* submit hdma pkt */
724 pdc20621_dump_hdma(qc);
725 pdc20621_push_hdma(qc, seq,
726 port_ofs + PDC_DIMM_HOST_PKT);
727 }
728 handled = 1;
729
730 } else if (qc->tf.protocol == ATA_PROT_DMA) { /* write */
731
732 /* step one - DMA from host to DIMM */
733 if (doing_hdma) {
734 u8 seq = (u8) (port_no + 1);
735 VPRINTK("ata%u: write hdma, 0x%x 0x%x\n", ap->id,
736 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
737
738 /* submit ata pkt */
739 writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
740 readl(mmio + PDC_20621_SEQCTL + (seq * 4));
741 writel(port_ofs + PDC_DIMM_ATA_PKT,
742 (void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
743 readl((void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
744 }
745
746 /* step two - execute ATA command */
747 else {
748 VPRINTK("ata%u: write ata, 0x%x 0x%x\n", ap->id,
749 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
750 /* get drive status; clear intr; complete txn */
751 ata_qc_complete(qc, ata_wait_idle(ap));
752 pdc20621_pop_hdma(qc);
753 }
754 handled = 1;
755
756 /* command completion, but no data xfer */
757 } else if (qc->tf.protocol == ATA_PROT_NODATA) {
758
759 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
760 DPRINTK("BUS_NODATA (drv_stat 0x%X)\n", status);
761 ata_qc_complete(qc, status);
762 handled = 1;
763
764 } else {
765 ap->stats.idle_irq++;
766 }
767
768 return handled;
769 }
770
771 static void pdc20621_irq_clear(struct ata_port *ap)
772 {
773 struct ata_host_set *host_set = ap->host_set;
774 void *mmio = host_set->mmio_base;
775
776 mmio += PDC_CHIP0_OFS;
777
778 readl(mmio + PDC_20621_SEQMASK);
779 }
780
781 static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
782 {
783 struct ata_host_set *host_set = dev_instance;
784 struct ata_port *ap;
785 u32 mask = 0;
786 unsigned int i, tmp, port_no;
787 unsigned int handled = 0;
788 void *mmio_base;
789
790 VPRINTK("ENTER\n");
791
792 if (!host_set || !host_set->mmio_base) {
793 VPRINTK("QUICK EXIT\n");
794 return IRQ_NONE;
795 }
796
797 mmio_base = host_set->mmio_base;
798
799 /* reading should also clear interrupts */
800 mmio_base += PDC_CHIP0_OFS;
801 mask = readl(mmio_base + PDC_20621_SEQMASK);
802 VPRINTK("mask == 0x%x\n", mask);
803
804 if (mask == 0xffffffff) {
805 VPRINTK("QUICK EXIT 2\n");
806 return IRQ_NONE;
807 }
808 mask &= 0xffff; /* only 16 tags possible */
809 if (!mask) {
810 VPRINTK("QUICK EXIT 3\n");
811 return IRQ_NONE;
812 }
813
814 spin_lock(&host_set->lock);
815
816 for (i = 1; i < 9; i++) {
817 port_no = i - 1;
818 if (port_no > 3)
819 port_no -= 4;
820 if (port_no >= host_set->n_ports)
821 ap = NULL;
822 else
823 ap = host_set->ports[port_no];
824 tmp = mask & (1 << i);
825 VPRINTK("seq %u, port_no %u, ap %p, tmp %x\n", i, port_no, ap, tmp);
826 if (tmp && ap && (!(ap->flags & ATA_FLAG_PORT_DISABLED))) {
827 struct ata_queued_cmd *qc;
828
829 qc = ata_qc_from_tag(ap, ap->active_tag);
830 if (qc && (!(qc->tf.ctl & ATA_NIEN)))
831 handled += pdc20621_host_intr(ap, qc, (i > 4),
832 mmio_base);
833 }
834 }
835
836 spin_unlock(&host_set->lock);
837
838 VPRINTK("mask == 0x%x\n", mask);
839
840 VPRINTK("EXIT\n");
841
842 return IRQ_RETVAL(handled);
843 }
844
845 static void pdc_eng_timeout(struct ata_port *ap)
846 {
847 u8 drv_stat;
848 struct ata_queued_cmd *qc;
849
850 DPRINTK("ENTER\n");
851
852 qc = ata_qc_from_tag(ap, ap->active_tag);
853 if (!qc) {
854 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
855 ap->id);
856 goto out;
857 }
858
859 /* hack alert! We cannot use the supplied completion
860 * function from inside the ->eh_strategy_handler() thread.
861 * libata is the only user of ->eh_strategy_handler() in
862 * any kernel, so the default scsi_done() assumes it is
863 * not being called from the SCSI EH.
864 */
865 qc->scsidone = scsi_finish_command;
866
867 switch (qc->tf.protocol) {
868 case ATA_PROT_DMA:
869 case ATA_PROT_NODATA:
870 printk(KERN_ERR "ata%u: command timeout\n", ap->id);
871 ata_qc_complete(qc, ata_wait_idle(ap) | ATA_ERR);
872 break;
873
874 default:
875 drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
876
877 printk(KERN_ERR "ata%u: unknown timeout, cmd 0x%x stat 0x%x\n",
878 ap->id, qc->tf.command, drv_stat);
879
880 ata_qc_complete(qc, drv_stat);
881 break;
882 }
883
884 out:
885 DPRINTK("EXIT\n");
886 }
887
888 static void pdc_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf)
889 {
890 WARN_ON (tf->protocol == ATA_PROT_DMA ||
891 tf->protocol == ATA_PROT_NODATA);
892 ata_tf_load(ap, tf);
893 }
894
895
896 static void pdc_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf)
897 {
898 WARN_ON (tf->protocol == ATA_PROT_DMA ||
899 tf->protocol == ATA_PROT_NODATA);
900 ata_exec_command(ap, tf);
901 }
902
903
904 static void pdc_sata_setup_port(struct ata_ioports *port, unsigned long base)
905 {
906 port->cmd_addr = base;
907 port->data_addr = base;
908 port->feature_addr =
909 port->error_addr = base + 0x4;
910 port->nsect_addr = base + 0x8;
911 port->lbal_addr = base + 0xc;
912 port->lbam_addr = base + 0x10;
913 port->lbah_addr = base + 0x14;
914 port->device_addr = base + 0x18;
915 port->command_addr =
916 port->status_addr = base + 0x1c;
917 port->altstatus_addr =
918 port->ctl_addr = base + 0x38;
919 }
920
921
922 #ifdef ATA_VERBOSE_DEBUG
923 static void pdc20621_get_from_dimm(struct ata_probe_ent *pe, void *psource,
924 u32 offset, u32 size)
925 {
926 u32 window_size;
927 u16 idx;
928 u8 page_mask;
929 long dist;
930 void *mmio = pe->mmio_base;
931 struct pdc_host_priv *hpriv = pe->private_data;
932 void *dimm_mmio = hpriv->dimm_mmio;
933
934 /* hard-code chip #0 */
935 mmio += PDC_CHIP0_OFS;
936
937 page_mask = 0x00;
938 window_size = 0x2000 * 4; /* 32K byte uchar size */
939 idx = (u16) (offset / window_size);
940
941 writel(0x01, mmio + PDC_GENERAL_CTLR);
942 readl(mmio + PDC_GENERAL_CTLR);
943 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
944 readl(mmio + PDC_DIMM_WINDOW_CTLR);
945
946 offset -= (idx * window_size);
947 idx++;
948 dist = ((long) (window_size - (offset + size))) >= 0 ? size :
949 (long) (window_size - offset);
950 memcpy_fromio((char *) psource, (char *) (dimm_mmio + offset / 4),
951 dist);
952
953 psource += dist;
954 size -= dist;
955 for (; (long) size >= (long) window_size ;) {
956 writel(0x01, mmio + PDC_GENERAL_CTLR);
957 readl(mmio + PDC_GENERAL_CTLR);
958 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
959 readl(mmio + PDC_DIMM_WINDOW_CTLR);
960 memcpy_fromio((char *) psource, (char *) (dimm_mmio),
961 window_size / 4);
962 psource += window_size;
963 size -= window_size;
964 idx ++;
965 }
966
967 if (size) {
968 writel(0x01, mmio + PDC_GENERAL_CTLR);
969 readl(mmio + PDC_GENERAL_CTLR);
970 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
971 readl(mmio + PDC_DIMM_WINDOW_CTLR);
972 memcpy_fromio((char *) psource, (char *) (dimm_mmio),
973 size / 4);
974 }
975 }
976 #endif
977
978
979 static void pdc20621_put_to_dimm(struct ata_probe_ent *pe, void *psource,
980 u32 offset, u32 size)
981 {
982 u32 window_size;
983 u16 idx;
984 u8 page_mask;
985 long dist;
986 void *mmio = pe->mmio_base;
987 struct pdc_host_priv *hpriv = pe->private_data;
988 void *dimm_mmio = hpriv->dimm_mmio;
989
990 /* hard-code chip #0 */
991 mmio += PDC_CHIP0_OFS;
992
993 page_mask = 0x00;
994 window_size = 0x2000 * 4; /* 32K byte uchar size */
995 idx = (u16) (offset / window_size);
996
997 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
998 readl(mmio + PDC_DIMM_WINDOW_CTLR);
999 offset -= (idx * window_size);
1000 idx++;
1001 dist = ((long)(s32)(window_size - (offset + size))) >= 0 ? size :
1002 (long) (window_size - offset);
1003 memcpy_toio((char *) (dimm_mmio + offset / 4), (char *) psource, dist);
1004 writel(0x01, mmio + PDC_GENERAL_CTLR);
1005 readl(mmio + PDC_GENERAL_CTLR);
1006
1007 psource += dist;
1008 size -= dist;
1009 for (; (long) size >= (long) window_size ;) {
1010 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1011 readl(mmio + PDC_DIMM_WINDOW_CTLR);
1012 memcpy_toio((char *) (dimm_mmio), (char *) psource,
1013 window_size / 4);
1014 writel(0x01, mmio + PDC_GENERAL_CTLR);
1015 readl(mmio + PDC_GENERAL_CTLR);
1016 psource += window_size;
1017 size -= window_size;
1018 idx ++;
1019 }
1020
1021 if (size) {
1022 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1023 readl(mmio + PDC_DIMM_WINDOW_CTLR);
1024 memcpy_toio((char *) (dimm_mmio), (char *) psource, size / 4);
1025 writel(0x01, mmio + PDC_GENERAL_CTLR);
1026 readl(mmio + PDC_GENERAL_CTLR);
1027 }
1028 }
1029
1030
1031 static unsigned int pdc20621_i2c_read(struct ata_probe_ent *pe, u32 device,
1032 u32 subaddr, u32 *pdata)
1033 {
1034 void *mmio = pe->mmio_base;
1035 u32 i2creg = 0;
1036 u32 status;
1037 u32 count =0;
1038
1039 /* hard-code chip #0 */
1040 mmio += PDC_CHIP0_OFS;
1041
1042 i2creg |= device << 24;
1043 i2creg |= subaddr << 16;
1044
1045 /* Set the device and subaddress */
1046 writel(i2creg, mmio + PDC_I2C_ADDR_DATA_OFFSET);
1047 readl(mmio + PDC_I2C_ADDR_DATA_OFFSET);
1048
1049 /* Write Control to perform read operation, mask int */
1050 writel(PDC_I2C_READ | PDC_I2C_START | PDC_I2C_MASK_INT,
1051 mmio + PDC_I2C_CONTROL_OFFSET);
1052
1053 for (count = 0; count <= 1000; count ++) {
1054 status = readl(mmio + PDC_I2C_CONTROL_OFFSET);
1055 if (status & PDC_I2C_COMPLETE) {
1056 status = readl(mmio + PDC_I2C_ADDR_DATA_OFFSET);
1057 break;
1058 } else if (count == 1000)
1059 return 0;
1060 }
1061
1062 *pdata = (status >> 8) & 0x000000ff;
1063 return 1;
1064 }
1065
1066
1067 static int pdc20621_detect_dimm(struct ata_probe_ent *pe)
1068 {
1069 u32 data=0 ;
1070 if (pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1071 PDC_DIMM_SPD_SYSTEM_FREQ, &data)) {
1072 if (data == 100)
1073 return 100;
1074 } else
1075 return 0;
1076
1077 if (pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS, 9, &data)) {
1078 if(data <= 0x75)
1079 return 133;
1080 } else
1081 return 0;
1082
1083 return 0;
1084 }
1085
1086
1087 static int pdc20621_prog_dimm0(struct ata_probe_ent *pe)
1088 {
1089 u32 spd0[50];
1090 u32 data = 0;
1091 int size, i;
1092 u8 bdimmsize;
1093 void *mmio = pe->mmio_base;
1094 static const struct {
1095 unsigned int reg;
1096 unsigned int ofs;
1097 } pdc_i2c_read_data [] = {
1098 { PDC_DIMM_SPD_TYPE, 11 },
1099 { PDC_DIMM_SPD_FRESH_RATE, 12 },
1100 { PDC_DIMM_SPD_COLUMN_NUM, 4 },
1101 { PDC_DIMM_SPD_ATTRIBUTE, 21 },
1102 { PDC_DIMM_SPD_ROW_NUM, 3 },
1103 { PDC_DIMM_SPD_BANK_NUM, 17 },
1104 { PDC_DIMM_SPD_MODULE_ROW, 5 },
1105 { PDC_DIMM_SPD_ROW_PRE_CHARGE, 27 },
1106 { PDC_DIMM_SPD_ROW_ACTIVE_DELAY, 28 },
1107 { PDC_DIMM_SPD_RAS_CAS_DELAY, 29 },
1108 { PDC_DIMM_SPD_ACTIVE_PRECHARGE, 30 },
1109 { PDC_DIMM_SPD_CAS_LATENCY, 18 },
1110 };
1111
1112 /* hard-code chip #0 */
1113 mmio += PDC_CHIP0_OFS;
1114
1115 for(i=0; i<ARRAY_SIZE(pdc_i2c_read_data); i++)
1116 pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1117 pdc_i2c_read_data[i].reg,
1118 &spd0[pdc_i2c_read_data[i].ofs]);
1119
1120 data |= (spd0[4] - 8) | ((spd0[21] != 0) << 3) | ((spd0[3]-11) << 4);
1121 data |= ((spd0[17] / 4) << 6) | ((spd0[5] / 2) << 7) |
1122 ((((spd0[27] + 9) / 10) - 1) << 8) ;
1123 data |= (((((spd0[29] > spd0[28])
1124 ? spd0[29] : spd0[28]) + 9) / 10) - 1) << 10;
1125 data |= ((spd0[30] - spd0[29] + 9) / 10 - 2) << 12;
1126
1127 if (spd0[18] & 0x08)
1128 data |= ((0x03) << 14);
1129 else if (spd0[18] & 0x04)
1130 data |= ((0x02) << 14);
1131 else if (spd0[18] & 0x01)
1132 data |= ((0x01) << 14);
1133 else
1134 data |= (0 << 14);
1135
1136 /*
1137 Calculate the size of bDIMMSize (power of 2) and
1138 merge the DIMM size by program start/end address.
1139 */
1140
1141 bdimmsize = spd0[4] + (spd0[5] / 2) + spd0[3] + (spd0[17] / 2) + 3;
1142 size = (1 << bdimmsize) >> 20; /* size = xxx(MB) */
1143 data |= (((size / 16) - 1) << 16);
1144 data |= (0 << 23);
1145 data |= 8;
1146 writel(data, mmio + PDC_DIMM0_CONTROL_OFFSET);
1147 readl(mmio + PDC_DIMM0_CONTROL_OFFSET);
1148 return size;
1149 }
1150
1151
1152 static unsigned int pdc20621_prog_dimm_global(struct ata_probe_ent *pe)
1153 {
1154 u32 data, spd0;
1155 int error, i;
1156 void *mmio = pe->mmio_base;
1157
1158 /* hard-code chip #0 */
1159 mmio += PDC_CHIP0_OFS;
1160
1161 /*
1162 Set To Default : DIMM Module Global Control Register (0x022259F1)
1163 DIMM Arbitration Disable (bit 20)
1164 DIMM Data/Control Output Driving Selection (bit12 - bit15)
1165 Refresh Enable (bit 17)
1166 */
1167
1168 data = 0x022259F1;
1169 writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
1170 readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
1171
1172 /* Turn on for ECC */
1173 pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1174 PDC_DIMM_SPD_TYPE, &spd0);
1175 if (spd0 == 0x02) {
1176 data |= (0x01 << 16);
1177 writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
1178 readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
1179 printk(KERN_ERR "Local DIMM ECC Enabled\n");
1180 }
1181
1182 /* DIMM Initialization Select/Enable (bit 18/19) */
1183 data &= (~(1<<18));
1184 data |= (1<<19);
1185 writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
1186
1187 error = 1;
1188 for (i = 1; i <= 10; i++) { /* polling ~5 secs */
1189 data = readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
1190 if (!(data & (1<<19))) {
1191 error = 0;
1192 break;
1193 }
1194 msleep(i*100);
1195 }
1196 return error;
1197 }
1198
1199
1200 static unsigned int pdc20621_dimm_init(struct ata_probe_ent *pe)
1201 {
1202 int speed, size, length;
1203 u32 addr,spd0,pci_status;
1204 u32 tmp=0;
1205 u32 time_period=0;
1206 u32 tcount=0;
1207 u32 ticks=0;
1208 u32 clock=0;
1209 u32 fparam=0;
1210 void *mmio = pe->mmio_base;
1211
1212 /* hard-code chip #0 */
1213 mmio += PDC_CHIP0_OFS;
1214
1215 /* Initialize PLL based upon PCI Bus Frequency */
1216
1217 /* Initialize Time Period Register */
1218 writel(0xffffffff, mmio + PDC_TIME_PERIOD);
1219 time_period = readl(mmio + PDC_TIME_PERIOD);
1220 VPRINTK("Time Period Register (0x40): 0x%x\n", time_period);
1221
1222 /* Enable timer */
1223 writel(0x00001a0, mmio + PDC_TIME_CONTROL);
1224 readl(mmio + PDC_TIME_CONTROL);
1225
1226 /* Wait 3 seconds */
1227 msleep(3000);
1228
1229 /*
1230 When timer is enabled, counter is decreased every internal
1231 clock cycle.
1232 */
1233
1234 tcount = readl(mmio + PDC_TIME_COUNTER);
1235 VPRINTK("Time Counter Register (0x44): 0x%x\n", tcount);
1236
1237 /*
1238 If SX4 is on PCI-X bus, after 3 seconds, the timer counter
1239 register should be >= (0xffffffff - 3x10^8).
1240 */
1241 if(tcount >= PCI_X_TCOUNT) {
1242 ticks = (time_period - tcount);
1243 VPRINTK("Num counters 0x%x (%d)\n", ticks, ticks);
1244
1245 clock = (ticks / 300000);
1246 VPRINTK("10 * Internal clk = 0x%x (%d)\n", clock, clock);
1247
1248 clock = (clock * 33);
1249 VPRINTK("10 * Internal clk * 33 = 0x%x (%d)\n", clock, clock);
1250
1251 /* PLL F Param (bit 22:16) */
1252 fparam = (1400000 / clock) - 2;
1253 VPRINTK("PLL F Param: 0x%x (%d)\n", fparam, fparam);
1254
1255 /* OD param = 0x2 (bit 31:30), R param = 0x5 (bit 29:25) */
1256 pci_status = (0x8a001824 | (fparam << 16));
1257 } else
1258 pci_status = PCI_PLL_INIT;
1259
1260 /* Initialize PLL. */
1261 VPRINTK("pci_status: 0x%x\n", pci_status);
1262 writel(pci_status, mmio + PDC_CTL_STATUS);
1263 readl(mmio + PDC_CTL_STATUS);
1264
1265 /*
1266 Read SPD of DIMM by I2C interface,
1267 and program the DIMM Module Controller.
1268 */
1269 if (!(speed = pdc20621_detect_dimm(pe))) {
1270 printk(KERN_ERR "Detect Local DIMM Fail\n");
1271 return 1; /* DIMM error */
1272 }
1273 VPRINTK("Local DIMM Speed = %d\n", speed);
1274
1275 /* Programming DIMM0 Module Control Register (index_CID0:80h) */
1276 size = pdc20621_prog_dimm0(pe);
1277 VPRINTK("Local DIMM Size = %dMB\n",size);
1278
1279 /* Programming DIMM Module Global Control Register (index_CID0:88h) */
1280 if (pdc20621_prog_dimm_global(pe)) {
1281 printk(KERN_ERR "Programming DIMM Module Global Control Register Fail\n");
1282 return 1;
1283 }
1284
1285 #ifdef ATA_VERBOSE_DEBUG
1286 {
1287 u8 test_parttern1[40] = {0x55,0xAA,'P','r','o','m','i','s','e',' ',
1288 'N','o','t',' ','Y','e','t',' ','D','e','f','i','n','e','d',' ',
1289 '1','.','1','0',
1290 '9','8','0','3','1','6','1','2',0,0};
1291 u8 test_parttern2[40] = {0};
1292
1293 pdc20621_put_to_dimm(pe, (void *) test_parttern2, 0x10040, 40);
1294 pdc20621_put_to_dimm(pe, (void *) test_parttern2, 0x40, 40);
1295
1296 pdc20621_put_to_dimm(pe, (void *) test_parttern1, 0x10040, 40);
1297 pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x40, 40);
1298 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1299 test_parttern2[1], &(test_parttern2[2]));
1300 pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x10040,
1301 40);
1302 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1303 test_parttern2[1], &(test_parttern2[2]));
1304
1305 pdc20621_put_to_dimm(pe, (void *) test_parttern1, 0x40, 40);
1306 pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x40, 40);
1307 printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
1308 test_parttern2[1], &(test_parttern2[2]));
1309 }
1310 #endif
1311
1312 /* ECC initiliazation. */
1313
1314 pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
1315 PDC_DIMM_SPD_TYPE, &spd0);
1316 if (spd0 == 0x02) {
1317 VPRINTK("Start ECC initialization\n");
1318 addr = 0;
1319 length = size * 1024 * 1024;
1320 while (addr < length) {
1321 pdc20621_put_to_dimm(pe, (void *) &tmp, addr,
1322 sizeof(u32));
1323 addr += sizeof(u32);
1324 }
1325 VPRINTK("Finish ECC initialization\n");
1326 }
1327 return 0;
1328 }
1329
1330
1331 static void pdc_20621_init(struct ata_probe_ent *pe)
1332 {
1333 u32 tmp;
1334 void *mmio = pe->mmio_base;
1335
1336 /* hard-code chip #0 */
1337 mmio += PDC_CHIP0_OFS;
1338
1339 /*
1340 * Select page 0x40 for our 32k DIMM window
1341 */
1342 tmp = readl(mmio + PDC_20621_DIMM_WINDOW) & 0xffff0000;
1343 tmp |= PDC_PAGE_WINDOW; /* page 40h; arbitrarily selected */
1344 writel(tmp, mmio + PDC_20621_DIMM_WINDOW);
1345
1346 /*
1347 * Reset Host DMA
1348 */
1349 tmp = readl(mmio + PDC_HDMA_CTLSTAT);
1350 tmp |= PDC_RESET;
1351 writel(tmp, mmio + PDC_HDMA_CTLSTAT);
1352 readl(mmio + PDC_HDMA_CTLSTAT); /* flush */
1353
1354 udelay(10);
1355
1356 tmp = readl(mmio + PDC_HDMA_CTLSTAT);
1357 tmp &= ~PDC_RESET;
1358 writel(tmp, mmio + PDC_HDMA_CTLSTAT);
1359 readl(mmio + PDC_HDMA_CTLSTAT); /* flush */
1360 }
1361
1362 static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1363 {
1364 static int printed_version;
1365 struct ata_probe_ent *probe_ent = NULL;
1366 unsigned long base;
1367 void *mmio_base, *dimm_mmio = NULL;
1368 struct pdc_host_priv *hpriv = NULL;
1369 unsigned int board_idx = (unsigned int) ent->driver_data;
1370 int pci_dev_busy = 0;
1371 int rc;
1372
1373 if (!printed_version++)
1374 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
1375
1376 /*
1377 * If this driver happens to only be useful on Apple's K2, then
1378 * we should check that here as it has a normal Serverworks ID
1379 */
1380 rc = pci_enable_device(pdev);
1381 if (rc)
1382 return rc;
1383
1384 rc = pci_request_regions(pdev, DRV_NAME);
1385 if (rc) {
1386 pci_dev_busy = 1;
1387 goto err_out;
1388 }
1389
1390 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
1391 if (rc)
1392 goto err_out_regions;
1393 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
1394 if (rc)
1395 goto err_out_regions;
1396
1397 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
1398 if (probe_ent == NULL) {
1399 rc = -ENOMEM;
1400 goto err_out_regions;
1401 }
1402
1403 memset(probe_ent, 0, sizeof(*probe_ent));
1404 probe_ent->dev = pci_dev_to_dev(pdev);
1405 INIT_LIST_HEAD(&probe_ent->node);
1406
1407 mmio_base = ioremap(pci_resource_start(pdev, 3),
1408 pci_resource_len(pdev, 3));
1409 if (mmio_base == NULL) {
1410 rc = -ENOMEM;
1411 goto err_out_free_ent;
1412 }
1413 base = (unsigned long) mmio_base;
1414
1415 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1416 if (!hpriv) {
1417 rc = -ENOMEM;
1418 goto err_out_iounmap;
1419 }
1420 memset(hpriv, 0, sizeof(*hpriv));
1421
1422 dimm_mmio = ioremap(pci_resource_start(pdev, 4),
1423 pci_resource_len(pdev, 4));
1424 if (!dimm_mmio) {
1425 kfree(hpriv);
1426 rc = -ENOMEM;
1427 goto err_out_iounmap;
1428 }
1429
1430 hpriv->dimm_mmio = dimm_mmio;
1431
1432 probe_ent->sht = pdc_port_info[board_idx].sht;
1433 probe_ent->host_flags = pdc_port_info[board_idx].host_flags;
1434 probe_ent->pio_mask = pdc_port_info[board_idx].pio_mask;
1435 probe_ent->mwdma_mask = pdc_port_info[board_idx].mwdma_mask;
1436 probe_ent->udma_mask = pdc_port_info[board_idx].udma_mask;
1437 probe_ent->port_ops = pdc_port_info[board_idx].port_ops;
1438
1439 probe_ent->irq = pdev->irq;
1440 probe_ent->irq_flags = SA_SHIRQ;
1441 probe_ent->mmio_base = mmio_base;
1442
1443 probe_ent->private_data = hpriv;
1444 base += PDC_CHIP0_OFS;
1445
1446 probe_ent->n_ports = 4;
1447 pdc_sata_setup_port(&probe_ent->port[0], base + 0x200);
1448 pdc_sata_setup_port(&probe_ent->port[1], base + 0x280);
1449 pdc_sata_setup_port(&probe_ent->port[2], base + 0x300);
1450 pdc_sata_setup_port(&probe_ent->port[3], base + 0x380);
1451
1452 pci_set_master(pdev);
1453
1454 /* initialize adapter */
1455 /* initialize local dimm */
1456 if (pdc20621_dimm_init(probe_ent)) {
1457 rc = -ENOMEM;
1458 goto err_out_iounmap_dimm;
1459 }
1460 pdc_20621_init(probe_ent);
1461
1462 /* FIXME: check ata_device_add return value */
1463 ata_device_add(probe_ent);
1464 kfree(probe_ent);
1465
1466 return 0;
1467
1468 err_out_iounmap_dimm: /* only get to this label if 20621 */
1469 kfree(hpriv);
1470 iounmap(dimm_mmio);
1471 err_out_iounmap:
1472 iounmap(mmio_base);
1473 err_out_free_ent:
1474 kfree(probe_ent);
1475 err_out_regions:
1476 pci_release_regions(pdev);
1477 err_out:
1478 if (!pci_dev_busy)
1479 pci_disable_device(pdev);
1480 return rc;
1481 }
1482
1483
1484 static int __init pdc_sata_init(void)
1485 {
1486 return pci_module_init(&pdc_sata_pci_driver);
1487 }
1488
1489
1490 static void __exit pdc_sata_exit(void)
1491 {
1492 pci_unregister_driver(&pdc_sata_pci_driver);
1493 }
1494
1495
1496 MODULE_AUTHOR("Jeff Garzik");
1497 MODULE_DESCRIPTION("Promise SATA low-level driver");
1498 MODULE_LICENSE("GPL");
1499 MODULE_DEVICE_TABLE(pci, pdc_sata_pci_tbl);
1500 MODULE_VERSION(DRV_VERSION);
1501
1502 module_init(pdc_sata_init);
1503 module_exit(pdc_sata_exit);
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