Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
[sfrench/cifs-2.6.git] / drivers / ata / sata_sx4.c
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     "0.11"
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         .port_disable           = ata_port_disable,
258         .tf_load                = pdc_tf_load_mmio,
259         .tf_read                = ata_tf_read,
260         .check_status           = ata_check_status,
261         .exec_command           = pdc_exec_command_mmio,
262         .dev_select             = ata_std_dev_select,
263         .phy_reset              = pdc_20621_phy_reset,
264         .qc_prep                = pdc20621_qc_prep,
265         .qc_issue               = pdc20621_qc_issue_prot,
266         .data_xfer              = ata_data_xfer,
267         .eng_timeout            = pdc_eng_timeout,
268         .irq_clear              = pdc20621_irq_clear,
269         .irq_on                 = ata_irq_on,
270         .irq_ack                = ata_irq_ack,
271         .port_start             = pdc_port_start,
272 };
273
274 static const struct ata_port_info pdc_port_info[] = {
275         /* board_20621 */
276         {
277                 .flags          = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
278                                   ATA_FLAG_SRST | ATA_FLAG_MMIO |
279                                   ATA_FLAG_NO_ATAPI | ATA_FLAG_PIO_POLLING,
280                 .pio_mask       = 0x1f, /* pio0-4 */
281                 .mwdma_mask     = 0x07, /* mwdma0-2 */
282                 .udma_mask      = ATA_UDMA6,
283                 .port_ops       = &pdc_20621_ops,
284         },
285
286 };
287
288 static const struct pci_device_id pdc_sata_pci_tbl[] = {
289         { PCI_VDEVICE(PROMISE, 0x6622), board_20621 },
290
291         { }     /* terminate list */
292 };
293
294 static struct pci_driver pdc_sata_pci_driver = {
295         .name                   = DRV_NAME,
296         .id_table               = pdc_sata_pci_tbl,
297         .probe                  = pdc_sata_init_one,
298         .remove                 = ata_pci_remove_one,
299 };
300
301
302 static int pdc_port_start(struct ata_port *ap)
303 {
304         struct device *dev = ap->host->dev;
305         struct pdc_port_priv *pp;
306         int rc;
307
308         rc = ata_port_start(ap);
309         if (rc)
310                 return rc;
311
312         pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
313         if (!pp)
314                 return -ENOMEM;
315
316         pp->pkt = dmam_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
317         if (!pp->pkt)
318                 return -ENOMEM;
319
320         ap->private_data = pp;
321
322         return 0;
323 }
324
325 static void pdc_20621_phy_reset (struct ata_port *ap)
326 {
327         VPRINTK("ENTER\n");
328         ap->cbl = ATA_CBL_SATA;
329         ata_port_probe(ap);
330         ata_bus_reset(ap);
331 }
332
333 static inline void pdc20621_ata_sg(struct ata_taskfile *tf, u8 *buf,
334                                            unsigned int portno,
335                                            unsigned int total_len)
336 {
337         u32 addr;
338         unsigned int dw = PDC_DIMM_APKT_PRD >> 2;
339         u32 *buf32 = (u32 *) buf;
340
341         /* output ATA packet S/G table */
342         addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
343                (PDC_DIMM_DATA_STEP * portno);
344         VPRINTK("ATA sg addr 0x%x, %d\n", addr, addr);
345         buf32[dw] = cpu_to_le32(addr);
346         buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
347
348         VPRINTK("ATA PSG @ %x == (0x%x, 0x%x)\n",
349                 PDC_20621_DIMM_BASE +
350                        (PDC_DIMM_WINDOW_STEP * portno) +
351                        PDC_DIMM_APKT_PRD,
352                 buf32[dw], buf32[dw + 1]);
353 }
354
355 static inline void pdc20621_host_sg(struct ata_taskfile *tf, u8 *buf,
356                                             unsigned int portno,
357                                             unsigned int total_len)
358 {
359         u32 addr;
360         unsigned int dw = PDC_DIMM_HPKT_PRD >> 2;
361         u32 *buf32 = (u32 *) buf;
362
363         /* output Host DMA packet S/G table */
364         addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
365                (PDC_DIMM_DATA_STEP * portno);
366
367         buf32[dw] = cpu_to_le32(addr);
368         buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
369
370         VPRINTK("HOST PSG @ %x == (0x%x, 0x%x)\n",
371                 PDC_20621_DIMM_BASE +
372                        (PDC_DIMM_WINDOW_STEP * portno) +
373                        PDC_DIMM_HPKT_PRD,
374                 buf32[dw], buf32[dw + 1]);
375 }
376
377 static inline unsigned int pdc20621_ata_pkt(struct ata_taskfile *tf,
378                                             unsigned int devno, u8 *buf,
379                                             unsigned int portno)
380 {
381         unsigned int i, dw;
382         u32 *buf32 = (u32 *) buf;
383         u8 dev_reg;
384
385         unsigned int dimm_sg = PDC_20621_DIMM_BASE +
386                                (PDC_DIMM_WINDOW_STEP * portno) +
387                                PDC_DIMM_APKT_PRD;
388         VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
389
390         i = PDC_DIMM_ATA_PKT;
391
392         /*
393          * Set up ATA packet
394          */
395         if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
396                 buf[i++] = PDC_PKT_READ;
397         else if (tf->protocol == ATA_PROT_NODATA)
398                 buf[i++] = PDC_PKT_NODATA;
399         else
400                 buf[i++] = 0;
401         buf[i++] = 0;                   /* reserved */
402         buf[i++] = portno + 1;          /* seq. id */
403         buf[i++] = 0xff;                /* delay seq. id */
404
405         /* dimm dma S/G, and next-pkt */
406         dw = i >> 2;
407         if (tf->protocol == ATA_PROT_NODATA)
408                 buf32[dw] = 0;
409         else
410                 buf32[dw] = cpu_to_le32(dimm_sg);
411         buf32[dw + 1] = 0;
412         i += 8;
413
414         if (devno == 0)
415                 dev_reg = ATA_DEVICE_OBS;
416         else
417                 dev_reg = ATA_DEVICE_OBS | ATA_DEV1;
418
419         /* select device */
420         buf[i++] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE;
421         buf[i++] = dev_reg;
422
423         /* device control register */
424         buf[i++] = (1 << 5) | PDC_REG_DEVCTL;
425         buf[i++] = tf->ctl;
426
427         return i;
428 }
429
430 static inline void pdc20621_host_pkt(struct ata_taskfile *tf, u8 *buf,
431                                      unsigned int portno)
432 {
433         unsigned int dw;
434         u32 tmp, *buf32 = (u32 *) buf;
435
436         unsigned int host_sg = PDC_20621_DIMM_BASE +
437                                (PDC_DIMM_WINDOW_STEP * portno) +
438                                PDC_DIMM_HOST_PRD;
439         unsigned int dimm_sg = PDC_20621_DIMM_BASE +
440                                (PDC_DIMM_WINDOW_STEP * portno) +
441                                PDC_DIMM_HPKT_PRD;
442         VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
443         VPRINTK("host_sg == 0x%x, %d\n", host_sg, host_sg);
444
445         dw = PDC_DIMM_HOST_PKT >> 2;
446
447         /*
448          * Set up Host DMA packet
449          */
450         if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
451                 tmp = PDC_PKT_READ;
452         else
453                 tmp = 0;
454         tmp |= ((portno + 1 + 4) << 16);        /* seq. id */
455         tmp |= (0xff << 24);                    /* delay seq. id */
456         buf32[dw + 0] = cpu_to_le32(tmp);
457         buf32[dw + 1] = cpu_to_le32(host_sg);
458         buf32[dw + 2] = cpu_to_le32(dimm_sg);
459         buf32[dw + 3] = 0;
460
461         VPRINTK("HOST PKT @ %x == (0x%x 0x%x 0x%x 0x%x)\n",
462                 PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * portno) +
463                         PDC_DIMM_HOST_PKT,
464                 buf32[dw + 0],
465                 buf32[dw + 1],
466                 buf32[dw + 2],
467                 buf32[dw + 3]);
468 }
469
470 static void pdc20621_dma_prep(struct ata_queued_cmd *qc)
471 {
472         struct scatterlist *sg;
473         struct ata_port *ap = qc->ap;
474         struct pdc_port_priv *pp = ap->private_data;
475         void __iomem *mmio = ap->host->iomap[PDC_MMIO_BAR];
476         void __iomem *dimm_mmio = ap->host->iomap[PDC_DIMM_BAR];
477         unsigned int portno = ap->port_no;
478         unsigned int i, idx, total_len = 0, sgt_len;
479         u32 *buf = (u32 *) &pp->dimm_buf[PDC_DIMM_HEADER_SZ];
480
481         WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
482
483         VPRINTK("ata%u: ENTER\n", ap->print_id);
484
485         /* hard-code chip #0 */
486         mmio += PDC_CHIP0_OFS;
487
488         /*
489          * Build S/G table
490          */
491         idx = 0;
492         ata_for_each_sg(sg, qc) {
493                 buf[idx++] = cpu_to_le32(sg_dma_address(sg));
494                 buf[idx++] = cpu_to_le32(sg_dma_len(sg));
495                 total_len += sg_dma_len(sg);
496         }
497         buf[idx - 1] |= cpu_to_le32(ATA_PRD_EOT);
498         sgt_len = idx * 4;
499
500         /*
501          * Build ATA, host DMA packets
502          */
503         pdc20621_host_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
504         pdc20621_host_pkt(&qc->tf, &pp->dimm_buf[0], portno);
505
506         pdc20621_ata_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
507         i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno);
508
509         if (qc->tf.flags & ATA_TFLAG_LBA48)
510                 i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i);
511         else
512                 i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i);
513
514         pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i);
515
516         /* copy three S/G tables and two packets to DIMM MMIO window */
517         memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP),
518                     &pp->dimm_buf, PDC_DIMM_HEADER_SZ);
519         memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP) +
520                     PDC_DIMM_HOST_PRD,
521                     &pp->dimm_buf[PDC_DIMM_HEADER_SZ], sgt_len);
522
523         /* force host FIFO dump */
524         writel(0x00000001, mmio + PDC_20621_GENERAL_CTL);
525
526         readl(dimm_mmio);       /* MMIO PCI posting flush */
527
528         VPRINTK("ata pkt buf ofs %u, prd size %u, mmio copied\n", i, sgt_len);
529 }
530
531 static void pdc20621_nodata_prep(struct ata_queued_cmd *qc)
532 {
533         struct ata_port *ap = qc->ap;
534         struct pdc_port_priv *pp = ap->private_data;
535         void __iomem *mmio = ap->host->iomap[PDC_MMIO_BAR];
536         void __iomem *dimm_mmio = ap->host->iomap[PDC_DIMM_BAR];
537         unsigned int portno = ap->port_no;
538         unsigned int i;
539
540         VPRINTK("ata%u: ENTER\n", ap->print_id);
541
542         /* hard-code chip #0 */
543         mmio += PDC_CHIP0_OFS;
544
545         i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno);
546
547         if (qc->tf.flags & ATA_TFLAG_LBA48)
548                 i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i);
549         else
550                 i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i);
551
552         pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i);
553
554         /* copy three S/G tables and two packets to DIMM MMIO window */
555         memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP),
556                     &pp->dimm_buf, PDC_DIMM_HEADER_SZ);
557
558         /* force host FIFO dump */
559         writel(0x00000001, mmio + PDC_20621_GENERAL_CTL);
560
561         readl(dimm_mmio);       /* MMIO PCI posting flush */
562
563         VPRINTK("ata pkt buf ofs %u, mmio copied\n", i);
564 }
565
566 static void pdc20621_qc_prep(struct ata_queued_cmd *qc)
567 {
568         switch (qc->tf.protocol) {
569         case ATA_PROT_DMA:
570                 pdc20621_dma_prep(qc);
571                 break;
572         case ATA_PROT_NODATA:
573                 pdc20621_nodata_prep(qc);
574                 break;
575         default:
576                 break;
577         }
578 }
579
580 static void __pdc20621_push_hdma(struct ata_queued_cmd *qc,
581                                  unsigned int seq,
582                                  u32 pkt_ofs)
583 {
584         struct ata_port *ap = qc->ap;
585         struct ata_host *host = ap->host;
586         void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
587
588         /* hard-code chip #0 */
589         mmio += PDC_CHIP0_OFS;
590
591         writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
592         readl(mmio + PDC_20621_SEQCTL + (seq * 4));     /* flush */
593
594         writel(pkt_ofs, mmio + PDC_HDMA_PKT_SUBMIT);
595         readl(mmio + PDC_HDMA_PKT_SUBMIT);      /* flush */
596 }
597
598 static void pdc20621_push_hdma(struct ata_queued_cmd *qc,
599                                 unsigned int seq,
600                                 u32 pkt_ofs)
601 {
602         struct ata_port *ap = qc->ap;
603         struct pdc_host_priv *pp = ap->host->private_data;
604         unsigned int idx = pp->hdma_prod & PDC_HDMA_Q_MASK;
605
606         if (!pp->doing_hdma) {
607                 __pdc20621_push_hdma(qc, seq, pkt_ofs);
608                 pp->doing_hdma = 1;
609                 return;
610         }
611
612         pp->hdma[idx].qc = qc;
613         pp->hdma[idx].seq = seq;
614         pp->hdma[idx].pkt_ofs = pkt_ofs;
615         pp->hdma_prod++;
616 }
617
618 static void pdc20621_pop_hdma(struct ata_queued_cmd *qc)
619 {
620         struct ata_port *ap = qc->ap;
621         struct pdc_host_priv *pp = ap->host->private_data;
622         unsigned int idx = pp->hdma_cons & PDC_HDMA_Q_MASK;
623
624         /* if nothing on queue, we're done */
625         if (pp->hdma_prod == pp->hdma_cons) {
626                 pp->doing_hdma = 0;
627                 return;
628         }
629
630         __pdc20621_push_hdma(pp->hdma[idx].qc, pp->hdma[idx].seq,
631                              pp->hdma[idx].pkt_ofs);
632         pp->hdma_cons++;
633 }
634
635 #ifdef ATA_VERBOSE_DEBUG
636 static void pdc20621_dump_hdma(struct ata_queued_cmd *qc)
637 {
638         struct ata_port *ap = qc->ap;
639         unsigned int port_no = ap->port_no;
640         void __iomem *dimm_mmio = ap->host->iomap[PDC_DIMM_BAR];
641
642         dimm_mmio += (port_no * PDC_DIMM_WINDOW_STEP);
643         dimm_mmio += PDC_DIMM_HOST_PKT;
644
645         printk(KERN_ERR "HDMA[0] == 0x%08X\n", readl(dimm_mmio));
646         printk(KERN_ERR "HDMA[1] == 0x%08X\n", readl(dimm_mmio + 4));
647         printk(KERN_ERR "HDMA[2] == 0x%08X\n", readl(dimm_mmio + 8));
648         printk(KERN_ERR "HDMA[3] == 0x%08X\n", readl(dimm_mmio + 12));
649 }
650 #else
651 static inline void pdc20621_dump_hdma(struct ata_queued_cmd *qc) { }
652 #endif /* ATA_VERBOSE_DEBUG */
653
654 static void pdc20621_packet_start(struct ata_queued_cmd *qc)
655 {
656         struct ata_port *ap = qc->ap;
657         struct ata_host *host = ap->host;
658         unsigned int port_no = ap->port_no;
659         void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
660         unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
661         u8 seq = (u8) (port_no + 1);
662         unsigned int port_ofs;
663
664         /* hard-code chip #0 */
665         mmio += PDC_CHIP0_OFS;
666
667         VPRINTK("ata%u: ENTER\n", ap->print_id);
668
669         wmb();                  /* flush PRD, pkt writes */
670
671         port_ofs = PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
672
673         /* if writing, we (1) DMA to DIMM, then (2) do ATA command */
674         if (rw && qc->tf.protocol == ATA_PROT_DMA) {
675                 seq += 4;
676
677                 pdc20621_dump_hdma(qc);
678                 pdc20621_push_hdma(qc, seq, port_ofs + PDC_DIMM_HOST_PKT);
679                 VPRINTK("queued ofs 0x%x (%u), seq %u\n",
680                         port_ofs + PDC_DIMM_HOST_PKT,
681                         port_ofs + PDC_DIMM_HOST_PKT,
682                         seq);
683         } else {
684                 writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
685                 readl(mmio + PDC_20621_SEQCTL + (seq * 4));     /* flush */
686
687                 writel(port_ofs + PDC_DIMM_ATA_PKT,
688                        ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
689                 readl(ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
690                 VPRINTK("submitted ofs 0x%x (%u), seq %u\n",
691                         port_ofs + PDC_DIMM_ATA_PKT,
692                         port_ofs + PDC_DIMM_ATA_PKT,
693                         seq);
694         }
695 }
696
697 static unsigned int pdc20621_qc_issue_prot(struct ata_queued_cmd *qc)
698 {
699         switch (qc->tf.protocol) {
700         case ATA_PROT_DMA:
701         case ATA_PROT_NODATA:
702                 pdc20621_packet_start(qc);
703                 return 0;
704
705         case ATA_PROT_ATAPI_DMA:
706                 BUG();
707                 break;
708
709         default:
710                 break;
711         }
712
713         return ata_qc_issue_prot(qc);
714 }
715
716 static inline unsigned int pdc20621_host_intr( struct ata_port *ap,
717                                           struct ata_queued_cmd *qc,
718                                           unsigned int doing_hdma,
719                                           void __iomem *mmio)
720 {
721         unsigned int port_no = ap->port_no;
722         unsigned int port_ofs =
723                 PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
724         u8 status;
725         unsigned int handled = 0;
726
727         VPRINTK("ENTER\n");
728
729         if ((qc->tf.protocol == ATA_PROT_DMA) &&        /* read */
730             (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
731
732                 /* step two - DMA from DIMM to host */
733                 if (doing_hdma) {
734                         VPRINTK("ata%u: read hdma, 0x%x 0x%x\n", ap->print_id,
735                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
736                         /* get drive status; clear intr; complete txn */
737                         qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
738                         ata_qc_complete(qc);
739                         pdc20621_pop_hdma(qc);
740                 }
741
742                 /* step one - exec ATA command */
743                 else {
744                         u8 seq = (u8) (port_no + 1 + 4);
745                         VPRINTK("ata%u: read ata, 0x%x 0x%x\n", ap->print_id,
746                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
747
748                         /* submit hdma pkt */
749                         pdc20621_dump_hdma(qc);
750                         pdc20621_push_hdma(qc, seq,
751                                            port_ofs + PDC_DIMM_HOST_PKT);
752                 }
753                 handled = 1;
754
755         } else if (qc->tf.protocol == ATA_PROT_DMA) {   /* write */
756
757                 /* step one - DMA from host to DIMM */
758                 if (doing_hdma) {
759                         u8 seq = (u8) (port_no + 1);
760                         VPRINTK("ata%u: write hdma, 0x%x 0x%x\n", ap->print_id,
761                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
762
763                         /* submit ata pkt */
764                         writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
765                         readl(mmio + PDC_20621_SEQCTL + (seq * 4));
766                         writel(port_ofs + PDC_DIMM_ATA_PKT,
767                                ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
768                         readl(ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
769                 }
770
771                 /* step two - execute ATA command */
772                 else {
773                         VPRINTK("ata%u: write ata, 0x%x 0x%x\n", ap->print_id,
774                                 readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
775                         /* get drive status; clear intr; complete txn */
776                         qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
777                         ata_qc_complete(qc);
778                         pdc20621_pop_hdma(qc);
779                 }
780                 handled = 1;
781
782         /* command completion, but no data xfer */
783         } else if (qc->tf.protocol == ATA_PROT_NODATA) {
784
785                 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
786                 DPRINTK("BUS_NODATA (drv_stat 0x%X)\n", status);
787                 qc->err_mask |= ac_err_mask(status);
788                 ata_qc_complete(qc);
789                 handled = 1;
790
791         } else {
792                 ap->stats.idle_irq++;
793         }
794
795         return handled;
796 }
797
798 static void pdc20621_irq_clear(struct ata_port *ap)
799 {
800         struct ata_host *host = ap->host;
801         void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
802
803         mmio += PDC_CHIP0_OFS;
804
805         readl(mmio + PDC_20621_SEQMASK);
806 }
807
808 static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance)
809 {
810         struct ata_host *host = dev_instance;
811         struct ata_port *ap;
812         u32 mask = 0;
813         unsigned int i, tmp, port_no;
814         unsigned int handled = 0;
815         void __iomem *mmio_base;
816
817         VPRINTK("ENTER\n");
818
819         if (!host || !host->iomap[PDC_MMIO_BAR]) {
820                 VPRINTK("QUICK EXIT\n");
821                 return IRQ_NONE;
822         }
823
824         mmio_base = host->iomap[PDC_MMIO_BAR];
825
826         /* reading should also clear interrupts */
827         mmio_base += PDC_CHIP0_OFS;
828         mask = readl(mmio_base + PDC_20621_SEQMASK);
829         VPRINTK("mask == 0x%x\n", mask);
830
831         if (mask == 0xffffffff) {
832                 VPRINTK("QUICK EXIT 2\n");
833                 return IRQ_NONE;
834         }
835         mask &= 0xffff;         /* only 16 tags possible */
836         if (!mask) {
837                 VPRINTK("QUICK EXIT 3\n");
838                 return IRQ_NONE;
839         }
840
841         spin_lock(&host->lock);
842
843         for (i = 1; i < 9; i++) {
844                 port_no = i - 1;
845                 if (port_no > 3)
846                         port_no -= 4;
847                 if (port_no >= host->n_ports)
848                         ap = NULL;
849                 else
850                         ap = host->ports[port_no];
851                 tmp = mask & (1 << i);
852                 VPRINTK("seq %u, port_no %u, ap %p, tmp %x\n", i, port_no, ap, tmp);
853                 if (tmp && ap &&
854                     !(ap->flags & ATA_FLAG_DISABLED)) {
855                         struct ata_queued_cmd *qc;
856
857                         qc = ata_qc_from_tag(ap, ap->active_tag);
858                         if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
859                                 handled += pdc20621_host_intr(ap, qc, (i > 4),
860                                                               mmio_base);
861                 }
862         }
863
864         spin_unlock(&host->lock);
865
866         VPRINTK("mask == 0x%x\n", mask);
867
868         VPRINTK("EXIT\n");
869
870         return IRQ_RETVAL(handled);
871 }
872
873 static void pdc_eng_timeout(struct ata_port *ap)
874 {
875         u8 drv_stat;
876         struct ata_host *host = ap->host;
877         struct ata_queued_cmd *qc;
878         unsigned long flags;
879
880         DPRINTK("ENTER\n");
881
882         spin_lock_irqsave(&host->lock, flags);
883
884         qc = ata_qc_from_tag(ap, ap->active_tag);
885
886         switch (qc->tf.protocol) {
887         case ATA_PROT_DMA:
888         case ATA_PROT_NODATA:
889                 ata_port_printk(ap, KERN_ERR, "command timeout\n");
890                 qc->err_mask |= __ac_err_mask(ata_wait_idle(ap));
891                 break;
892
893         default:
894                 drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
895
896                 ata_port_printk(ap, KERN_ERR,
897                                 "unknown timeout, cmd 0x%x stat 0x%x\n",
898                                 qc->tf.command, drv_stat);
899
900                 qc->err_mask |= ac_err_mask(drv_stat);
901                 break;
902         }
903
904         spin_unlock_irqrestore(&host->lock, flags);
905         ata_eh_qc_complete(qc);
906         DPRINTK("EXIT\n");
907 }
908
909 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
910 {
911         WARN_ON (tf->protocol == ATA_PROT_DMA ||
912                  tf->protocol == ATA_PROT_NODATA);
913         ata_tf_load(ap, tf);
914 }
915
916
917 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
918 {
919         WARN_ON (tf->protocol == ATA_PROT_DMA ||
920                  tf->protocol == ATA_PROT_NODATA);
921         ata_exec_command(ap, tf);
922 }
923
924
925 static void pdc_sata_setup_port(struct ata_ioports *port, void __iomem *base)
926 {
927         port->cmd_addr          = base;
928         port->data_addr         = base;
929         port->feature_addr      =
930         port->error_addr        = base + 0x4;
931         port->nsect_addr        = base + 0x8;
932         port->lbal_addr         = base + 0xc;
933         port->lbam_addr         = base + 0x10;
934         port->lbah_addr         = base + 0x14;
935         port->device_addr       = base + 0x18;
936         port->command_addr      =
937         port->status_addr       = base + 0x1c;
938         port->altstatus_addr    =
939         port->ctl_addr          = base + 0x38;
940 }
941
942
943 #ifdef ATA_VERBOSE_DEBUG
944 static void pdc20621_get_from_dimm(struct ata_host *host, void *psource,
945                                    u32 offset, u32 size)
946 {
947         u32 window_size;
948         u16 idx;
949         u8 page_mask;
950         long dist;
951         void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
952         void __iomem *dimm_mmio = host->iomap[PDC_DIMM_BAR];
953
954         /* hard-code chip #0 */
955         mmio += PDC_CHIP0_OFS;
956
957         page_mask = 0x00;
958         window_size = 0x2000 * 4; /* 32K byte uchar size */
959         idx = (u16) (offset / window_size);
960
961         writel(0x01, mmio + PDC_GENERAL_CTLR);
962         readl(mmio + PDC_GENERAL_CTLR);
963         writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
964         readl(mmio + PDC_DIMM_WINDOW_CTLR);
965
966         offset -= (idx * window_size);
967         idx++;
968         dist = ((long) (window_size - (offset + size))) >= 0 ? size :
969                 (long) (window_size - offset);
970         memcpy_fromio((char *) psource, (char *) (dimm_mmio + offset / 4),
971                       dist);
972
973         psource += dist;
974         size -= dist;
975         for (; (long) size >= (long) window_size ;) {
976                 writel(0x01, mmio + PDC_GENERAL_CTLR);
977                 readl(mmio + PDC_GENERAL_CTLR);
978                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
979                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
980                 memcpy_fromio((char *) psource, (char *) (dimm_mmio),
981                               window_size / 4);
982                 psource += window_size;
983                 size -= window_size;
984                 idx ++;
985         }
986
987         if (size) {
988                 writel(0x01, mmio + PDC_GENERAL_CTLR);
989                 readl(mmio + PDC_GENERAL_CTLR);
990                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
991                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
992                 memcpy_fromio((char *) psource, (char *) (dimm_mmio),
993                               size / 4);
994         }
995 }
996 #endif
997
998
999 static void pdc20621_put_to_dimm(struct ata_host *host, void *psource,
1000                                  u32 offset, u32 size)
1001 {
1002         u32 window_size;
1003         u16 idx;
1004         u8 page_mask;
1005         long dist;
1006         void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
1007         void __iomem *dimm_mmio = host->iomap[PDC_DIMM_BAR];
1008
1009         /* hard-code chip #0 */
1010         mmio += PDC_CHIP0_OFS;
1011
1012         page_mask = 0x00;
1013         window_size = 0x2000 * 4;       /* 32K byte uchar size */
1014         idx = (u16) (offset / window_size);
1015
1016         writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1017         readl(mmio + PDC_DIMM_WINDOW_CTLR);
1018         offset -= (idx * window_size);
1019         idx++;
1020         dist = ((long)(s32)(window_size - (offset + size))) >= 0 ? size :
1021                 (long) (window_size - offset);
1022         memcpy_toio(dimm_mmio + offset / 4, psource, dist);
1023         writel(0x01, mmio + PDC_GENERAL_CTLR);
1024         readl(mmio + PDC_GENERAL_CTLR);
1025
1026         psource += dist;
1027         size -= dist;
1028         for (; (long) size >= (long) window_size ;) {
1029                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1030                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
1031                 memcpy_toio(dimm_mmio, psource, window_size / 4);
1032                 writel(0x01, mmio + PDC_GENERAL_CTLR);
1033                 readl(mmio + PDC_GENERAL_CTLR);
1034                 psource += window_size;
1035                 size -= window_size;
1036                 idx ++;
1037         }
1038
1039         if (size) {
1040                 writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
1041                 readl(mmio + PDC_DIMM_WINDOW_CTLR);
1042                 memcpy_toio(dimm_mmio, psource, size / 4);
1043                 writel(0x01, mmio + PDC_GENERAL_CTLR);
1044                 readl(mmio + PDC_GENERAL_CTLR);
1045         }
1046 }
1047
1048
1049 static unsigned int pdc20621_i2c_read(struct ata_host *host, u32 device,
1050                                       u32 subaddr, u32 *pdata)
1051 {
1052         void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
1053         u32 i2creg  = 0;
1054         u32 status;
1055         u32 count =0;
1056
1057         /* hard-code chip #0 */
1058         mmio += PDC_CHIP0_OFS;
1059
1060         i2creg |= device << 24;
1061         i2creg |= subaddr << 16;
1062
1063         /* Set the device and subaddress */
1064         writel(i2creg, mmio + PDC_I2C_ADDR_DATA);
1065         readl(mmio + PDC_I2C_ADDR_DATA);
1066
1067         /* Write Control to perform read operation, mask int */
1068         writel(PDC_I2C_READ | PDC_I2C_START | PDC_I2C_MASK_INT,
1069                mmio + PDC_I2C_CONTROL);
1070
1071         for (count = 0; count <= 1000; count ++) {
1072                 status = readl(mmio + PDC_I2C_CONTROL);
1073                 if (status & PDC_I2C_COMPLETE) {
1074                         status = readl(mmio + PDC_I2C_ADDR_DATA);
1075                         break;
1076                 } else if (count == 1000)
1077                         return 0;
1078         }
1079
1080         *pdata = (status >> 8) & 0x000000ff;
1081         return 1;
1082 }
1083
1084
1085 static int pdc20621_detect_dimm(struct ata_host *host)
1086 {
1087         u32 data=0 ;
1088         if (pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS,
1089                              PDC_DIMM_SPD_SYSTEM_FREQ, &data)) {
1090                 if (data == 100)
1091                         return 100;
1092         } else
1093                 return 0;
1094
1095         if (pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS, 9, &data)) {
1096                 if(data <= 0x75)
1097                         return 133;
1098         } else
1099                 return 0;
1100
1101         return 0;
1102 }
1103
1104
1105 static int pdc20621_prog_dimm0(struct ata_host *host)
1106 {
1107         u32 spd0[50];
1108         u32 data = 0;
1109         int size, i;
1110         u8 bdimmsize;
1111         void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
1112         static const struct {
1113                 unsigned int reg;
1114                 unsigned int ofs;
1115         } pdc_i2c_read_data [] = {
1116                 { PDC_DIMM_SPD_TYPE, 11 },
1117                 { PDC_DIMM_SPD_FRESH_RATE, 12 },
1118                 { PDC_DIMM_SPD_COLUMN_NUM, 4 },
1119                 { PDC_DIMM_SPD_ATTRIBUTE, 21 },
1120                 { PDC_DIMM_SPD_ROW_NUM, 3 },
1121                 { PDC_DIMM_SPD_BANK_NUM, 17 },
1122                 { PDC_DIMM_SPD_MODULE_ROW, 5 },
1123                 { PDC_DIMM_SPD_ROW_PRE_CHARGE, 27 },
1124                 { PDC_DIMM_SPD_ROW_ACTIVE_DELAY, 28 },
1125                 { PDC_DIMM_SPD_RAS_CAS_DELAY, 29 },
1126                 { PDC_DIMM_SPD_ACTIVE_PRECHARGE, 30 },
1127                 { PDC_DIMM_SPD_CAS_LATENCY, 18 },
1128         };
1129
1130         /* hard-code chip #0 */
1131         mmio += PDC_CHIP0_OFS;
1132
1133         for(i=0; i<ARRAY_SIZE(pdc_i2c_read_data); i++)
1134                 pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS,
1135                                   pdc_i2c_read_data[i].reg,
1136                                   &spd0[pdc_i2c_read_data[i].ofs]);
1137
1138         data |= (spd0[4] - 8) | ((spd0[21] != 0) << 3) | ((spd0[3]-11) << 4);
1139         data |= ((spd0[17] / 4) << 6) | ((spd0[5] / 2) << 7) |
1140                 ((((spd0[27] + 9) / 10) - 1) << 8) ;
1141         data |= (((((spd0[29] > spd0[28])
1142                     ? spd0[29] : spd0[28]) + 9) / 10) - 1) << 10;
1143         data |= ((spd0[30] - spd0[29] + 9) / 10 - 2) << 12;
1144
1145         if (spd0[18] & 0x08)
1146                 data |= ((0x03) << 14);
1147         else if (spd0[18] & 0x04)
1148                 data |= ((0x02) << 14);
1149         else if (spd0[18] & 0x01)
1150                 data |= ((0x01) << 14);
1151         else
1152                 data |= (0 << 14);
1153
1154         /*
1155            Calculate the size of bDIMMSize (power of 2) and
1156            merge the DIMM size by program start/end address.
1157         */
1158
1159         bdimmsize = spd0[4] + (spd0[5] / 2) + spd0[3] + (spd0[17] / 2) + 3;
1160         size = (1 << bdimmsize) >> 20;  /* size = xxx(MB) */
1161         data |= (((size / 16) - 1) << 16);
1162         data |= (0 << 23);
1163         data |= 8;
1164         writel(data, mmio + PDC_DIMM0_CONTROL);
1165         readl(mmio + PDC_DIMM0_CONTROL);
1166         return size;
1167 }
1168
1169
1170 static unsigned int pdc20621_prog_dimm_global(struct ata_host *host)
1171 {
1172         u32 data, spd0;
1173         int error, i;
1174         void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
1175
1176         /* hard-code chip #0 */
1177         mmio += PDC_CHIP0_OFS;
1178
1179         /*
1180           Set To Default : DIMM Module Global Control Register (0x022259F1)
1181           DIMM Arbitration Disable (bit 20)
1182           DIMM Data/Control Output Driving Selection (bit12 - bit15)
1183           Refresh Enable (bit 17)
1184         */
1185
1186         data = 0x022259F1;
1187         writel(data, mmio + PDC_SDRAM_CONTROL);
1188         readl(mmio + PDC_SDRAM_CONTROL);
1189
1190         /* Turn on for ECC */
1191         pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS,
1192                           PDC_DIMM_SPD_TYPE, &spd0);
1193         if (spd0 == 0x02) {
1194                 data |= (0x01 << 16);
1195                 writel(data, mmio + PDC_SDRAM_CONTROL);
1196                 readl(mmio + PDC_SDRAM_CONTROL);
1197                 printk(KERN_ERR "Local DIMM ECC Enabled\n");
1198         }
1199
1200         /* DIMM Initialization Select/Enable (bit 18/19) */
1201         data &= (~(1<<18));
1202         data |= (1<<19);
1203         writel(data, mmio + PDC_SDRAM_CONTROL);
1204
1205         error = 1;
1206         for (i = 1; i <= 10; i++) {   /* polling ~5 secs */
1207                 data = readl(mmio + PDC_SDRAM_CONTROL);
1208                 if (!(data & (1<<19))) {
1209                         error = 0;
1210                         break;
1211                 }
1212                 msleep(i*100);
1213         }
1214         return error;
1215 }
1216
1217
1218 static unsigned int pdc20621_dimm_init(struct ata_host *host)
1219 {
1220         int speed, size, length;
1221         u32 addr,spd0,pci_status;
1222         u32 tmp=0;
1223         u32 time_period=0;
1224         u32 tcount=0;
1225         u32 ticks=0;
1226         u32 clock=0;
1227         u32 fparam=0;
1228         void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
1229
1230         /* hard-code chip #0 */
1231         mmio += PDC_CHIP0_OFS;
1232
1233         /* Initialize PLL based upon PCI Bus Frequency */
1234
1235         /* Initialize Time Period Register */
1236         writel(0xffffffff, mmio + PDC_TIME_PERIOD);
1237         time_period = readl(mmio + PDC_TIME_PERIOD);
1238         VPRINTK("Time Period Register (0x40): 0x%x\n", time_period);
1239
1240         /* Enable timer */
1241         writel(PDC_TIMER_DEFAULT, mmio + PDC_TIME_CONTROL);
1242         readl(mmio + PDC_TIME_CONTROL);
1243
1244         /* Wait 3 seconds */
1245         msleep(3000);
1246
1247         /*
1248            When timer is enabled, counter is decreased every internal
1249            clock cycle.
1250         */
1251
1252         tcount = readl(mmio + PDC_TIME_COUNTER);
1253         VPRINTK("Time Counter Register (0x44): 0x%x\n", tcount);
1254
1255         /*
1256            If SX4 is on PCI-X bus, after 3 seconds, the timer counter
1257            register should be >= (0xffffffff - 3x10^8).
1258         */
1259         if(tcount >= PCI_X_TCOUNT) {
1260                 ticks = (time_period - tcount);
1261                 VPRINTK("Num counters 0x%x (%d)\n", ticks, ticks);
1262
1263                 clock = (ticks / 300000);
1264                 VPRINTK("10 * Internal clk = 0x%x (%d)\n", clock, clock);
1265
1266                 clock = (clock * 33);
1267                 VPRINTK("10 * Internal clk * 33 = 0x%x (%d)\n", clock, clock);
1268
1269                 /* PLL F Param (bit 22:16) */
1270                 fparam = (1400000 / clock) - 2;
1271                 VPRINTK("PLL F Param: 0x%x (%d)\n", fparam, fparam);
1272
1273                 /* OD param = 0x2 (bit 31:30), R param = 0x5 (bit 29:25) */
1274                 pci_status = (0x8a001824 | (fparam << 16));
1275         } else
1276                 pci_status = PCI_PLL_INIT;
1277
1278         /* Initialize PLL. */
1279         VPRINTK("pci_status: 0x%x\n", pci_status);
1280         writel(pci_status, mmio + PDC_CTL_STATUS);
1281         readl(mmio + PDC_CTL_STATUS);
1282
1283         /*
1284            Read SPD of DIMM by I2C interface,
1285            and program the DIMM Module Controller.
1286         */
1287         if (!(speed = pdc20621_detect_dimm(host))) {
1288                 printk(KERN_ERR "Detect Local DIMM Fail\n");
1289                 return 1;       /* DIMM error */
1290         }
1291         VPRINTK("Local DIMM Speed = %d\n", speed);
1292
1293         /* Programming DIMM0 Module Control Register (index_CID0:80h) */
1294         size = pdc20621_prog_dimm0(host);
1295         VPRINTK("Local DIMM Size = %dMB\n",size);
1296
1297         /* Programming DIMM Module Global Control Register (index_CID0:88h) */
1298         if (pdc20621_prog_dimm_global(host)) {
1299                 printk(KERN_ERR "Programming DIMM Module Global Control Register Fail\n");
1300                 return 1;
1301         }
1302
1303 #ifdef ATA_VERBOSE_DEBUG
1304         {
1305                 u8 test_parttern1[40] = {0x55,0xAA,'P','r','o','m','i','s','e',' ',
1306                                 'N','o','t',' ','Y','e','t',' ','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, (void *) test_parttern2, 0x10040, 40);
1312                 pdc20621_put_to_dimm(host, (void *) test_parttern2, 0x40, 40);
1313
1314                 pdc20621_put_to_dimm(host, (void *) test_parttern1, 0x10040, 40);
1315                 pdc20621_get_from_dimm(host, (void *) 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, (void *) 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, (void *) test_parttern1, 0x40, 40);
1324                 pdc20621_get_from_dimm(host, (void *) 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, const struct pci_device_id *ent)
1381 {
1382         static int printed_version;
1383         const struct ata_port_info *ppi[] =
1384                 { &pdc_port_info[ent->driver_data], NULL };
1385         struct ata_host *host;
1386         void __iomem *base;
1387         struct pdc_host_priv *hpriv;
1388         int 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         base = host->iomap[PDC_MMIO_BAR] + PDC_CHIP0_OFS;
1415         pdc_sata_setup_port(&host->ports[0]->ioaddr, base + 0x200);
1416         pdc_sata_setup_port(&host->ports[1]->ioaddr, base + 0x280);
1417         pdc_sata_setup_port(&host->ports[2]->ioaddr, base + 0x300);
1418         pdc_sata_setup_port(&host->ports[3]->ioaddr, base + 0x380);
1419
1420         /* configure and activate */
1421         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
1422         if (rc)
1423                 return rc;
1424         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
1425         if (rc)
1426                 return rc;
1427
1428         if (pdc20621_dimm_init(host))
1429                 return -ENOMEM;
1430         pdc_20621_init(host);
1431
1432         pci_set_master(pdev);
1433         return ata_host_activate(host, pdev->irq, pdc20621_interrupt,
1434                                  IRQF_SHARED, &pdc_sata_sht);
1435 }
1436
1437
1438 static int __init pdc_sata_init(void)
1439 {
1440         return pci_register_driver(&pdc_sata_pci_driver);
1441 }
1442
1443
1444 static void __exit pdc_sata_exit(void)
1445 {
1446         pci_unregister_driver(&pdc_sata_pci_driver);
1447 }
1448
1449
1450 MODULE_AUTHOR("Jeff Garzik");
1451 MODULE_DESCRIPTION("Promise SATA low-level driver");
1452 MODULE_LICENSE("GPL");
1453 MODULE_DEVICE_TABLE(pci, pdc_sata_pci_tbl);
1454 MODULE_VERSION(DRV_VERSION);
1455
1456 module_init(pdc_sata_init);
1457 module_exit(pdc_sata_exit);