Loading...
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * pata_atp867x.c - ARTOP 867X 64bit 4-channel UDMA133 ATA controller driver
4 *
5 * (C) 2009 Google Inc. John(Jung-Ik) Lee <jilee@google.com>
6 *
7 * Per Atp867 data sheet rev 1.2, Acard.
8 * Based in part on early ide code from
9 * 2003-2004 by Eric Uhrhane, Google, Inc.
10 *
11 * TODO:
12 * 1. RAID features [comparison, XOR, striping, mirroring, etc.]
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/pci.h>
18#include <linux/blkdev.h>
19#include <linux/delay.h>
20#include <linux/device.h>
21#include <linux/gfp.h>
22#include <scsi/scsi_host.h>
23#include <linux/libata.h>
24
25#define DRV_NAME "pata_atp867x"
26#define DRV_VERSION "0.7.5"
27
28/*
29 * IO Registers
30 * Note that all runtime hot priv ports are cached in ap private_data
31 */
32
33enum {
34 ATP867X_IO_CHANNEL_OFFSET = 0x10,
35
36 /*
37 * IO Register Bitfields
38 */
39
40 ATP867X_IO_PIOSPD_ACTIVE_SHIFT = 4,
41 ATP867X_IO_PIOSPD_RECOVER_SHIFT = 0,
42
43 ATP867X_IO_DMAMODE_MSTR_SHIFT = 0,
44 ATP867X_IO_DMAMODE_MSTR_MASK = 0x07,
45 ATP867X_IO_DMAMODE_SLAVE_SHIFT = 4,
46 ATP867X_IO_DMAMODE_SLAVE_MASK = 0x70,
47
48 ATP867X_IO_DMAMODE_UDMA_6 = 0x07,
49 ATP867X_IO_DMAMODE_UDMA_5 = 0x06,
50 ATP867X_IO_DMAMODE_UDMA_4 = 0x05,
51 ATP867X_IO_DMAMODE_UDMA_3 = 0x04,
52 ATP867X_IO_DMAMODE_UDMA_2 = 0x03,
53 ATP867X_IO_DMAMODE_UDMA_1 = 0x02,
54 ATP867X_IO_DMAMODE_UDMA_0 = 0x01,
55 ATP867X_IO_DMAMODE_DISABLE = 0x00,
56
57 ATP867X_IO_SYS_INFO_66MHZ = 0x04,
58 ATP867X_IO_SYS_INFO_SLOW_UDMA5 = 0x02,
59 ATP867X_IO_SYS_MASK_RESERVED = (~0xf1),
60
61 ATP867X_IO_PORTSPD_VAL = 0x1143,
62 ATP867X_PREREAD_VAL = 0x0200,
63
64 ATP867X_NUM_PORTS = 4,
65 ATP867X_BAR_IOBASE = 0,
66 ATP867X_BAR_ROMBASE = 6,
67};
68
69#define ATP867X_IOBASE(ap) ((ap)->host->iomap[0])
70#define ATP867X_SYS_INFO(ap) (0x3F + ATP867X_IOBASE(ap))
71
72#define ATP867X_IO_PORTBASE(ap, port) (0x00 + ATP867X_IOBASE(ap) + \
73 (port) * ATP867X_IO_CHANNEL_OFFSET)
74#define ATP867X_IO_DMABASE(ap, port) (0x40 + \
75 ATP867X_IO_PORTBASE((ap), (port)))
76
77#define ATP867X_IO_STATUS(ap, port) (0x07 + \
78 ATP867X_IO_PORTBASE((ap), (port)))
79#define ATP867X_IO_ALTSTATUS(ap, port) (0x0E + \
80 ATP867X_IO_PORTBASE((ap), (port)))
81
82/*
83 * hot priv ports
84 */
85#define ATP867X_IO_MSTRPIOSPD(ap, port) (0x08 + \
86 ATP867X_IO_DMABASE((ap), (port)))
87#define ATP867X_IO_SLAVPIOSPD(ap, port) (0x09 + \
88 ATP867X_IO_DMABASE((ap), (port)))
89#define ATP867X_IO_8BPIOSPD(ap, port) (0x0A + \
90 ATP867X_IO_DMABASE((ap), (port)))
91#define ATP867X_IO_DMAMODE(ap, port) (0x0B + \
92 ATP867X_IO_DMABASE((ap), (port)))
93
94#define ATP867X_IO_PORTSPD(ap, port) (0x4A + \
95 ATP867X_IO_PORTBASE((ap), (port)))
96#define ATP867X_IO_PREREAD(ap, port) (0x4C + \
97 ATP867X_IO_PORTBASE((ap), (port)))
98
99struct atp867x_priv {
100 void __iomem *dma_mode;
101 void __iomem *mstr_piospd;
102 void __iomem *slave_piospd;
103 void __iomem *eightb_piospd;
104 int pci66mhz;
105};
106
107static void atp867x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
108{
109 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
110 struct atp867x_priv *dp = ap->private_data;
111 u8 speed = adev->dma_mode;
112 u8 b;
113 u8 mode = speed - XFER_UDMA_0 + 1;
114
115 /*
116 * Doc 6.6.9: decrease the udma mode value by 1 for safer UDMA speed
117 * on 66MHz bus
118 * rev-A: UDMA_1~4 (5, 6 no change)
119 * rev-B: all UDMA modes
120 * UDMA_0 stays not to disable UDMA
121 */
122 if (dp->pci66mhz && mode > ATP867X_IO_DMAMODE_UDMA_0 &&
123 (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B ||
124 mode < ATP867X_IO_DMAMODE_UDMA_5))
125 mode--;
126
127 b = ioread8(dp->dma_mode);
128 if (adev->devno & 1) {
129 b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK) |
130 (mode << ATP867X_IO_DMAMODE_SLAVE_SHIFT);
131 } else {
132 b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK) |
133 (mode << ATP867X_IO_DMAMODE_MSTR_SHIFT);
134 }
135 iowrite8(b, dp->dma_mode);
136}
137
138static int atp867x_get_active_clocks_shifted(struct ata_port *ap,
139 unsigned int clk)
140{
141 struct atp867x_priv *dp = ap->private_data;
142 unsigned char clocks = clk;
143
144 /*
145 * Doc 6.6.9: increase the clock value by 1 for safer PIO speed
146 * on 66MHz bus
147 */
148 if (dp->pci66mhz)
149 clocks++;
150
151 switch (clocks) {
152 case 0:
153 clocks = 1;
154 break;
155 case 1 ... 6:
156 break;
157 default:
158 ata_port_warn(ap, "ATP867X: active %dclk is invalid. "
159 "Using 12clk.\n", clk);
160 fallthrough;
161 case 9 ... 12:
162 clocks = 7; /* 12 clk */
163 break;
164 case 7:
165 case 8: /* default 8 clk */
166 clocks = 0;
167 goto active_clock_shift_done;
168 }
169
170active_clock_shift_done:
171 return clocks << ATP867X_IO_PIOSPD_ACTIVE_SHIFT;
172}
173
174static int atp867x_get_recover_clocks_shifted(struct ata_port *ap,
175 unsigned int clk)
176{
177 unsigned char clocks = clk;
178
179 switch (clocks) {
180 case 0:
181 clocks = 1;
182 break;
183 case 1 ... 11:
184 break;
185 case 13:
186 case 14:
187 --clocks; /* by the spec */
188 break;
189 case 15:
190 break;
191 default:
192 ata_port_warn(ap, "ATP867X: recover %dclk is invalid. "
193 "Using default 12clk.\n", clk);
194 fallthrough;
195 case 12: /* default 12 clk */
196 clocks = 0;
197 break;
198 }
199
200 return clocks << ATP867X_IO_PIOSPD_RECOVER_SHIFT;
201}
202
203static void atp867x_set_piomode(struct ata_port *ap, struct ata_device *adev)
204{
205 struct ata_device *peer = ata_dev_pair(adev);
206 struct atp867x_priv *dp = ap->private_data;
207 u8 speed = adev->pio_mode;
208 struct ata_timing t, p;
209 int T, UT;
210 u8 b;
211
212 T = 1000000000 / 33333;
213 UT = T / 4;
214
215 ata_timing_compute(adev, speed, &t, T, UT);
216 if (peer && peer->pio_mode) {
217 ata_timing_compute(peer, peer->pio_mode, &p, T, UT);
218 ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);
219 }
220
221 b = ioread8(dp->dma_mode);
222 if (adev->devno & 1)
223 b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK);
224 else
225 b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK);
226 iowrite8(b, dp->dma_mode);
227
228 b = atp867x_get_active_clocks_shifted(ap, t.active) |
229 atp867x_get_recover_clocks_shifted(ap, t.recover);
230
231 if (adev->devno & 1)
232 iowrite8(b, dp->slave_piospd);
233 else
234 iowrite8(b, dp->mstr_piospd);
235
236 b = atp867x_get_active_clocks_shifted(ap, t.act8b) |
237 atp867x_get_recover_clocks_shifted(ap, t.rec8b);
238
239 iowrite8(b, dp->eightb_piospd);
240}
241
242static int atp867x_cable_override(struct pci_dev *pdev)
243{
244 if (pdev->subsystem_vendor == PCI_VENDOR_ID_ARTOP &&
245 (pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867A ||
246 pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867B)) {
247 return 1;
248 }
249 return 0;
250}
251
252static int atp867x_cable_detect(struct ata_port *ap)
253{
254 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
255
256 if (atp867x_cable_override(pdev))
257 return ATA_CBL_PATA40_SHORT;
258
259 return ATA_CBL_PATA_UNK;
260}
261
262static const struct scsi_host_template atp867x_sht = {
263 ATA_BMDMA_SHT(DRV_NAME),
264};
265
266static struct ata_port_operations atp867x_ops = {
267 .inherits = &ata_bmdma_port_ops,
268 .cable_detect = atp867x_cable_detect,
269 .set_piomode = atp867x_set_piomode,
270 .set_dmamode = atp867x_set_dmamode,
271};
272
273
274static void atp867x_check_res(struct pci_dev *pdev)
275{
276 int i;
277 unsigned long start, len;
278
279 /* Check the PCI resources for this channel are enabled */
280 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
281 start = pci_resource_start(pdev, i);
282 len = pci_resource_len(pdev, i);
283 dev_dbg(&pdev->dev, "ATP867X: resource start:len=%lx:%lx\n",
284 start, len);
285 }
286}
287
288static void atp867x_check_ports(struct ata_port *ap, int port)
289{
290 struct ata_ioports *ioaddr = &ap->ioaddr;
291 struct atp867x_priv *dp = ap->private_data;
292
293 ata_port_dbg(ap, "ATP867X: port[%d] addresses\n"
294 " cmd_addr =0x%lx, 0x%lx\n"
295 " ctl_addr =0x%lx, 0x%lx\n"
296 " bmdma_addr =0x%lx, 0x%lx\n"
297 " data_addr =0x%lx\n"
298 " error_addr =0x%lx\n"
299 " feature_addr =0x%lx\n"
300 " nsect_addr =0x%lx\n"
301 " lbal_addr =0x%lx\n"
302 " lbam_addr =0x%lx\n"
303 " lbah_addr =0x%lx\n"
304 " device_addr =0x%lx\n"
305 " status_addr =0x%lx\n"
306 " command_addr =0x%lx\n"
307 " dp->dma_mode =0x%lx\n"
308 " dp->mstr_piospd =0x%lx\n"
309 " dp->slave_piospd =0x%lx\n"
310 " dp->eightb_piospd =0x%lx\n"
311 " dp->pci66mhz =0x%lx\n",
312 port,
313 (unsigned long)ioaddr->cmd_addr,
314 (unsigned long)ATP867X_IO_PORTBASE(ap, port),
315 (unsigned long)ioaddr->ctl_addr,
316 (unsigned long)ATP867X_IO_ALTSTATUS(ap, port),
317 (unsigned long)ioaddr->bmdma_addr,
318 (unsigned long)ATP867X_IO_DMABASE(ap, port),
319 (unsigned long)ioaddr->data_addr,
320 (unsigned long)ioaddr->error_addr,
321 (unsigned long)ioaddr->feature_addr,
322 (unsigned long)ioaddr->nsect_addr,
323 (unsigned long)ioaddr->lbal_addr,
324 (unsigned long)ioaddr->lbam_addr,
325 (unsigned long)ioaddr->lbah_addr,
326 (unsigned long)ioaddr->device_addr,
327 (unsigned long)ioaddr->status_addr,
328 (unsigned long)ioaddr->command_addr,
329 (unsigned long)dp->dma_mode,
330 (unsigned long)dp->mstr_piospd,
331 (unsigned long)dp->slave_piospd,
332 (unsigned long)dp->eightb_piospd,
333 (unsigned long)dp->pci66mhz);
334}
335
336static int atp867x_set_priv(struct ata_port *ap)
337{
338 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
339 struct atp867x_priv *dp;
340 int port = ap->port_no;
341
342 dp = ap->private_data =
343 devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
344 if (dp == NULL)
345 return -ENOMEM;
346
347 dp->dma_mode = ATP867X_IO_DMAMODE(ap, port);
348 dp->mstr_piospd = ATP867X_IO_MSTRPIOSPD(ap, port);
349 dp->slave_piospd = ATP867X_IO_SLAVPIOSPD(ap, port);
350 dp->eightb_piospd = ATP867X_IO_8BPIOSPD(ap, port);
351
352 dp->pci66mhz =
353 ioread8(ATP867X_SYS_INFO(ap)) & ATP867X_IO_SYS_INFO_66MHZ;
354
355 return 0;
356}
357
358static void atp867x_fixup(struct ata_host *host)
359{
360 struct pci_dev *pdev = to_pci_dev(host->dev);
361 struct ata_port *ap = host->ports[0];
362 int i;
363 u8 v;
364
365 /*
366 * Broken BIOS might not set latency high enough
367 */
368 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &v);
369 if (v < 0x80) {
370 v = 0x80;
371 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, v);
372 dev_dbg(&pdev->dev, "ATP867X: set latency timer to %d\n", v);
373 }
374
375 /*
376 * init 8bit io ports speed(0aaarrrr) to 43h and
377 * init udma modes of master/slave to 0/0(11h)
378 */
379 for (i = 0; i < ATP867X_NUM_PORTS; i++)
380 iowrite16(ATP867X_IO_PORTSPD_VAL, ATP867X_IO_PORTSPD(ap, i));
381
382 /*
383 * init PreREAD counts
384 */
385 for (i = 0; i < ATP867X_NUM_PORTS; i++)
386 iowrite16(ATP867X_PREREAD_VAL, ATP867X_IO_PREREAD(ap, i));
387
388 v = ioread8(ATP867X_IOBASE(ap) + 0x28);
389 v &= 0xcf; /* Enable INTA#: bit4=0 means enable */
390 v |= 0xc0; /* Enable PCI burst, MRM & not immediate interrupts */
391 iowrite8(v, ATP867X_IOBASE(ap) + 0x28);
392
393 /*
394 * Turn off the over clocked udma5 mode, only for Rev-B
395 */
396 v = ioread8(ATP867X_SYS_INFO(ap));
397 v &= ATP867X_IO_SYS_MASK_RESERVED;
398 if (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B)
399 v |= ATP867X_IO_SYS_INFO_SLOW_UDMA5;
400 iowrite8(v, ATP867X_SYS_INFO(ap));
401}
402
403static int atp867x_ata_pci_sff_init_host(struct ata_host *host)
404{
405 struct device *gdev = host->dev;
406 struct pci_dev *pdev = to_pci_dev(gdev);
407 unsigned int mask = 0;
408 int i, rc;
409
410 /*
411 * do not map rombase
412 */
413 rc = pcim_iomap_regions(pdev, 1 << ATP867X_BAR_IOBASE, DRV_NAME);
414 if (rc == -EBUSY)
415 pcim_pin_device(pdev);
416 if (rc)
417 return rc;
418 host->iomap = pcim_iomap_table(pdev);
419
420 atp867x_check_res(pdev);
421
422 for (i = 0; i < PCI_STD_NUM_BARS; i++)
423 dev_dbg(gdev, "ATP867X: iomap[%d]=0x%p\n", i,
424 host->iomap[i]);
425
426 /*
427 * request, iomap BARs and init port addresses accordingly
428 */
429 for (i = 0; i < host->n_ports; i++) {
430 struct ata_port *ap = host->ports[i];
431 struct ata_ioports *ioaddr = &ap->ioaddr;
432
433 ioaddr->cmd_addr = ATP867X_IO_PORTBASE(ap, i);
434 ioaddr->ctl_addr = ioaddr->altstatus_addr
435 = ATP867X_IO_ALTSTATUS(ap, i);
436 ioaddr->bmdma_addr = ATP867X_IO_DMABASE(ap, i);
437
438 ata_sff_std_ports(ioaddr);
439 rc = atp867x_set_priv(ap);
440 if (rc)
441 return rc;
442
443 atp867x_check_ports(ap, i);
444
445 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx",
446 (unsigned long)ioaddr->cmd_addr,
447 (unsigned long)ioaddr->ctl_addr);
448 ata_port_desc(ap, "bmdma 0x%lx",
449 (unsigned long)ioaddr->bmdma_addr);
450
451 mask |= 1 << i;
452 }
453
454 if (!mask) {
455 dev_err(gdev, "no available native port\n");
456 return -ENODEV;
457 }
458
459 atp867x_fixup(host);
460
461 return dma_set_mask_and_coherent(&pdev->dev, ATA_DMA_MASK);
462}
463
464static int atp867x_init_one(struct pci_dev *pdev,
465 const struct pci_device_id *id)
466{
467 static const struct ata_port_info info_867x = {
468 .flags = ATA_FLAG_SLAVE_POSS,
469 .pio_mask = ATA_PIO4,
470 .udma_mask = ATA_UDMA6,
471 .port_ops = &atp867x_ops,
472 };
473
474 struct ata_host *host;
475 const struct ata_port_info *ppi[] = { &info_867x, NULL };
476 int rc;
477
478 ata_print_version_once(&pdev->dev, DRV_VERSION);
479
480 rc = pcim_enable_device(pdev);
481 if (rc)
482 return rc;
483
484 dev_info(&pdev->dev, "ATP867X: ATP867 ATA UDMA133 controller (rev %02X)",
485 pdev->device);
486
487 host = ata_host_alloc_pinfo(&pdev->dev, ppi, ATP867X_NUM_PORTS);
488 if (!host) {
489 dev_err(&pdev->dev, "failed to allocate ATA host\n");
490 rc = -ENOMEM;
491 goto err_out;
492 }
493
494 rc = atp867x_ata_pci_sff_init_host(host);
495 if (rc) {
496 dev_err(&pdev->dev, "failed to init host\n");
497 goto err_out;
498 }
499
500 pci_set_master(pdev);
501
502 rc = ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
503 IRQF_SHARED, &atp867x_sht);
504 if (rc)
505 dev_err(&pdev->dev, "failed to activate host\n");
506
507err_out:
508 return rc;
509}
510
511#ifdef CONFIG_PM_SLEEP
512static int atp867x_reinit_one(struct pci_dev *pdev)
513{
514 struct ata_host *host = pci_get_drvdata(pdev);
515 int rc;
516
517 rc = ata_pci_device_do_resume(pdev);
518 if (rc)
519 return rc;
520
521 atp867x_fixup(host);
522
523 ata_host_resume(host);
524 return 0;
525}
526#endif
527
528static struct pci_device_id atp867x_pci_tbl[] = {
529 { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867A), 0 },
530 { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867B), 0 },
531 { },
532};
533
534static struct pci_driver atp867x_driver = {
535 .name = DRV_NAME,
536 .id_table = atp867x_pci_tbl,
537 .probe = atp867x_init_one,
538 .remove = ata_pci_remove_one,
539#ifdef CONFIG_PM_SLEEP
540 .suspend = ata_pci_device_suspend,
541 .resume = atp867x_reinit_one,
542#endif
543};
544
545module_pci_driver(atp867x_driver);
546
547MODULE_AUTHOR("John(Jung-Ik) Lee, Google Inc.");
548MODULE_DESCRIPTION("low level driver for Artop/Acard 867x ATA controller");
549MODULE_LICENSE("GPL");
550MODULE_DEVICE_TABLE(pci, atp867x_pci_tbl);
551MODULE_VERSION(DRV_VERSION);
1/*
2 * pata_atp867x.c - ARTOP 867X 64bit 4-channel UDMA133 ATA controller driver
3 *
4 * (C) 2009 Google Inc. John(Jung-Ik) Lee <jilee@google.com>
5 *
6 * Per Atp867 data sheet rev 1.2, Acard.
7 * Based in part on early ide code from
8 * 2003-2004 by Eric Uhrhane, Google, Inc.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 *
25 * TODO:
26 * 1. RAID features [comparison, XOR, striping, mirroring, etc.]
27 */
28
29#include <linux/kernel.h>
30#include <linux/module.h>
31#include <linux/pci.h>
32#include <linux/blkdev.h>
33#include <linux/delay.h>
34#include <linux/device.h>
35#include <linux/gfp.h>
36#include <scsi/scsi_host.h>
37#include <linux/libata.h>
38
39#define DRV_NAME "pata_atp867x"
40#define DRV_VERSION "0.7.5"
41
42/*
43 * IO Registers
44 * Note that all runtime hot priv ports are cached in ap private_data
45 */
46
47enum {
48 ATP867X_IO_CHANNEL_OFFSET = 0x10,
49
50 /*
51 * IO Register Bitfields
52 */
53
54 ATP867X_IO_PIOSPD_ACTIVE_SHIFT = 4,
55 ATP867X_IO_PIOSPD_RECOVER_SHIFT = 0,
56
57 ATP867X_IO_DMAMODE_MSTR_SHIFT = 0,
58 ATP867X_IO_DMAMODE_MSTR_MASK = 0x07,
59 ATP867X_IO_DMAMODE_SLAVE_SHIFT = 4,
60 ATP867X_IO_DMAMODE_SLAVE_MASK = 0x70,
61
62 ATP867X_IO_DMAMODE_UDMA_6 = 0x07,
63 ATP867X_IO_DMAMODE_UDMA_5 = 0x06,
64 ATP867X_IO_DMAMODE_UDMA_4 = 0x05,
65 ATP867X_IO_DMAMODE_UDMA_3 = 0x04,
66 ATP867X_IO_DMAMODE_UDMA_2 = 0x03,
67 ATP867X_IO_DMAMODE_UDMA_1 = 0x02,
68 ATP867X_IO_DMAMODE_UDMA_0 = 0x01,
69 ATP867X_IO_DMAMODE_DISABLE = 0x00,
70
71 ATP867X_IO_SYS_INFO_66MHZ = 0x04,
72 ATP867X_IO_SYS_INFO_SLOW_UDMA5 = 0x02,
73 ATP867X_IO_SYS_MASK_RESERVED = (~0xf1),
74
75 ATP867X_IO_PORTSPD_VAL = 0x1143,
76 ATP867X_PREREAD_VAL = 0x0200,
77
78 ATP867X_NUM_PORTS = 4,
79 ATP867X_BAR_IOBASE = 0,
80 ATP867X_BAR_ROMBASE = 6,
81};
82
83#define ATP867X_IOBASE(ap) ((ap)->host->iomap[0])
84#define ATP867X_SYS_INFO(ap) (0x3F + ATP867X_IOBASE(ap))
85
86#define ATP867X_IO_PORTBASE(ap, port) (0x00 + ATP867X_IOBASE(ap) + \
87 (port) * ATP867X_IO_CHANNEL_OFFSET)
88#define ATP867X_IO_DMABASE(ap, port) (0x40 + \
89 ATP867X_IO_PORTBASE((ap), (port)))
90
91#define ATP867X_IO_STATUS(ap, port) (0x07 + \
92 ATP867X_IO_PORTBASE((ap), (port)))
93#define ATP867X_IO_ALTSTATUS(ap, port) (0x0E + \
94 ATP867X_IO_PORTBASE((ap), (port)))
95
96/*
97 * hot priv ports
98 */
99#define ATP867X_IO_MSTRPIOSPD(ap, port) (0x08 + \
100 ATP867X_IO_DMABASE((ap), (port)))
101#define ATP867X_IO_SLAVPIOSPD(ap, port) (0x09 + \
102 ATP867X_IO_DMABASE((ap), (port)))
103#define ATP867X_IO_8BPIOSPD(ap, port) (0x0A + \
104 ATP867X_IO_DMABASE((ap), (port)))
105#define ATP867X_IO_DMAMODE(ap, port) (0x0B + \
106 ATP867X_IO_DMABASE((ap), (port)))
107
108#define ATP867X_IO_PORTSPD(ap, port) (0x4A + \
109 ATP867X_IO_PORTBASE((ap), (port)))
110#define ATP867X_IO_PREREAD(ap, port) (0x4C + \
111 ATP867X_IO_PORTBASE((ap), (port)))
112
113struct atp867x_priv {
114 void __iomem *dma_mode;
115 void __iomem *mstr_piospd;
116 void __iomem *slave_piospd;
117 void __iomem *eightb_piospd;
118 int pci66mhz;
119};
120
121static void atp867x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
122{
123 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
124 struct atp867x_priv *dp = ap->private_data;
125 u8 speed = adev->dma_mode;
126 u8 b;
127 u8 mode = speed - XFER_UDMA_0 + 1;
128
129 /*
130 * Doc 6.6.9: decrease the udma mode value by 1 for safer UDMA speed
131 * on 66MHz bus
132 * rev-A: UDMA_1~4 (5, 6 no change)
133 * rev-B: all UDMA modes
134 * UDMA_0 stays not to disable UDMA
135 */
136 if (dp->pci66mhz && mode > ATP867X_IO_DMAMODE_UDMA_0 &&
137 (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B ||
138 mode < ATP867X_IO_DMAMODE_UDMA_5))
139 mode--;
140
141 b = ioread8(dp->dma_mode);
142 if (adev->devno & 1) {
143 b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK) |
144 (mode << ATP867X_IO_DMAMODE_SLAVE_SHIFT);
145 } else {
146 b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK) |
147 (mode << ATP867X_IO_DMAMODE_MSTR_SHIFT);
148 }
149 iowrite8(b, dp->dma_mode);
150}
151
152static int atp867x_get_active_clocks_shifted(struct ata_port *ap,
153 unsigned int clk)
154{
155 struct atp867x_priv *dp = ap->private_data;
156 unsigned char clocks = clk;
157
158 /*
159 * Doc 6.6.9: increase the clock value by 1 for safer PIO speed
160 * on 66MHz bus
161 */
162 if (dp->pci66mhz)
163 clocks++;
164
165 switch (clocks) {
166 case 0:
167 clocks = 1;
168 break;
169 case 1 ... 6:
170 break;
171 default:
172 printk(KERN_WARNING "ATP867X: active %dclk is invalid. "
173 "Using 12clk.\n", clk);
174 case 9 ... 12:
175 clocks = 7; /* 12 clk */
176 break;
177 case 7:
178 case 8: /* default 8 clk */
179 clocks = 0;
180 goto active_clock_shift_done;
181 }
182
183active_clock_shift_done:
184 return clocks << ATP867X_IO_PIOSPD_ACTIVE_SHIFT;
185}
186
187static int atp867x_get_recover_clocks_shifted(unsigned int clk)
188{
189 unsigned char clocks = clk;
190
191 switch (clocks) {
192 case 0:
193 clocks = 1;
194 break;
195 case 1 ... 11:
196 break;
197 case 13:
198 case 14:
199 --clocks; /* by the spec */
200 break;
201 case 15:
202 break;
203 default:
204 printk(KERN_WARNING "ATP867X: recover %dclk is invalid. "
205 "Using default 12clk.\n", clk);
206 case 12: /* default 12 clk */
207 clocks = 0;
208 break;
209 }
210
211 return clocks << ATP867X_IO_PIOSPD_RECOVER_SHIFT;
212}
213
214static void atp867x_set_piomode(struct ata_port *ap, struct ata_device *adev)
215{
216 struct ata_device *peer = ata_dev_pair(adev);
217 struct atp867x_priv *dp = ap->private_data;
218 u8 speed = adev->pio_mode;
219 struct ata_timing t, p;
220 int T, UT;
221 u8 b;
222
223 T = 1000000000 / 33333;
224 UT = T / 4;
225
226 ata_timing_compute(adev, speed, &t, T, UT);
227 if (peer && peer->pio_mode) {
228 ata_timing_compute(peer, peer->pio_mode, &p, T, UT);
229 ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);
230 }
231
232 b = ioread8(dp->dma_mode);
233 if (adev->devno & 1)
234 b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK);
235 else
236 b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK);
237 iowrite8(b, dp->dma_mode);
238
239 b = atp867x_get_active_clocks_shifted(ap, t.active) |
240 atp867x_get_recover_clocks_shifted(t.recover);
241
242 if (adev->devno & 1)
243 iowrite8(b, dp->slave_piospd);
244 else
245 iowrite8(b, dp->mstr_piospd);
246
247 b = atp867x_get_active_clocks_shifted(ap, t.act8b) |
248 atp867x_get_recover_clocks_shifted(t.rec8b);
249
250 iowrite8(b, dp->eightb_piospd);
251}
252
253static int atp867x_cable_override(struct pci_dev *pdev)
254{
255 if (pdev->subsystem_vendor == PCI_VENDOR_ID_ARTOP &&
256 (pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867A ||
257 pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867B)) {
258 return 1;
259 }
260 return 0;
261}
262
263static int atp867x_cable_detect(struct ata_port *ap)
264{
265 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
266
267 if (atp867x_cable_override(pdev))
268 return ATA_CBL_PATA40_SHORT;
269
270 return ATA_CBL_PATA_UNK;
271}
272
273static struct scsi_host_template atp867x_sht = {
274 ATA_BMDMA_SHT(DRV_NAME),
275};
276
277static struct ata_port_operations atp867x_ops = {
278 .inherits = &ata_bmdma_port_ops,
279 .cable_detect = atp867x_cable_detect,
280 .set_piomode = atp867x_set_piomode,
281 .set_dmamode = atp867x_set_dmamode,
282};
283
284
285#ifdef ATP867X_DEBUG
286static void atp867x_check_res(struct pci_dev *pdev)
287{
288 int i;
289 unsigned long start, len;
290
291 /* Check the PCI resources for this channel are enabled */
292 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
293 start = pci_resource_start(pdev, i);
294 len = pci_resource_len(pdev, i);
295 printk(KERN_DEBUG "ATP867X: resource start:len=%lx:%lx\n",
296 start, len);
297 }
298}
299
300static void atp867x_check_ports(struct ata_port *ap, int port)
301{
302 struct ata_ioports *ioaddr = &ap->ioaddr;
303 struct atp867x_priv *dp = ap->private_data;
304
305 printk(KERN_DEBUG "ATP867X: port[%d] addresses\n"
306 " cmd_addr =0x%llx, 0x%llx\n"
307 " ctl_addr =0x%llx, 0x%llx\n"
308 " bmdma_addr =0x%llx, 0x%llx\n"
309 " data_addr =0x%llx\n"
310 " error_addr =0x%llx\n"
311 " feature_addr =0x%llx\n"
312 " nsect_addr =0x%llx\n"
313 " lbal_addr =0x%llx\n"
314 " lbam_addr =0x%llx\n"
315 " lbah_addr =0x%llx\n"
316 " device_addr =0x%llx\n"
317 " status_addr =0x%llx\n"
318 " command_addr =0x%llx\n"
319 " dp->dma_mode =0x%llx\n"
320 " dp->mstr_piospd =0x%llx\n"
321 " dp->slave_piospd =0x%llx\n"
322 " dp->eightb_piospd =0x%llx\n"
323 " dp->pci66mhz =0x%lx\n",
324 port,
325 (unsigned long long)ioaddr->cmd_addr,
326 (unsigned long long)ATP867X_IO_PORTBASE(ap, port),
327 (unsigned long long)ioaddr->ctl_addr,
328 (unsigned long long)ATP867X_IO_ALTSTATUS(ap, port),
329 (unsigned long long)ioaddr->bmdma_addr,
330 (unsigned long long)ATP867X_IO_DMABASE(ap, port),
331 (unsigned long long)ioaddr->data_addr,
332 (unsigned long long)ioaddr->error_addr,
333 (unsigned long long)ioaddr->feature_addr,
334 (unsigned long long)ioaddr->nsect_addr,
335 (unsigned long long)ioaddr->lbal_addr,
336 (unsigned long long)ioaddr->lbam_addr,
337 (unsigned long long)ioaddr->lbah_addr,
338 (unsigned long long)ioaddr->device_addr,
339 (unsigned long long)ioaddr->status_addr,
340 (unsigned long long)ioaddr->command_addr,
341 (unsigned long long)dp->dma_mode,
342 (unsigned long long)dp->mstr_piospd,
343 (unsigned long long)dp->slave_piospd,
344 (unsigned long long)dp->eightb_piospd,
345 (unsigned long)dp->pci66mhz);
346}
347#endif
348
349static int atp867x_set_priv(struct ata_port *ap)
350{
351 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
352 struct atp867x_priv *dp;
353 int port = ap->port_no;
354
355 dp = ap->private_data =
356 devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
357 if (dp == NULL)
358 return -ENOMEM;
359
360 dp->dma_mode = ATP867X_IO_DMAMODE(ap, port);
361 dp->mstr_piospd = ATP867X_IO_MSTRPIOSPD(ap, port);
362 dp->slave_piospd = ATP867X_IO_SLAVPIOSPD(ap, port);
363 dp->eightb_piospd = ATP867X_IO_8BPIOSPD(ap, port);
364
365 dp->pci66mhz =
366 ioread8(ATP867X_SYS_INFO(ap)) & ATP867X_IO_SYS_INFO_66MHZ;
367
368 return 0;
369}
370
371static void atp867x_fixup(struct ata_host *host)
372{
373 struct pci_dev *pdev = to_pci_dev(host->dev);
374 struct ata_port *ap = host->ports[0];
375 int i;
376 u8 v;
377
378 /*
379 * Broken BIOS might not set latency high enough
380 */
381 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &v);
382 if (v < 0x80) {
383 v = 0x80;
384 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, v);
385 printk(KERN_DEBUG "ATP867X: set latency timer of device %s"
386 " to %d\n", pci_name(pdev), v);
387 }
388
389 /*
390 * init 8bit io ports speed(0aaarrrr) to 43h and
391 * init udma modes of master/slave to 0/0(11h)
392 */
393 for (i = 0; i < ATP867X_NUM_PORTS; i++)
394 iowrite16(ATP867X_IO_PORTSPD_VAL, ATP867X_IO_PORTSPD(ap, i));
395
396 /*
397 * init PreREAD counts
398 */
399 for (i = 0; i < ATP867X_NUM_PORTS; i++)
400 iowrite16(ATP867X_PREREAD_VAL, ATP867X_IO_PREREAD(ap, i));
401
402 v = ioread8(ATP867X_IOBASE(ap) + 0x28);
403 v &= 0xcf; /* Enable INTA#: bit4=0 means enable */
404 v |= 0xc0; /* Enable PCI burst, MRM & not immediate interrupts */
405 iowrite8(v, ATP867X_IOBASE(ap) + 0x28);
406
407 /*
408 * Turn off the over clocked udma5 mode, only for Rev-B
409 */
410 v = ioread8(ATP867X_SYS_INFO(ap));
411 v &= ATP867X_IO_SYS_MASK_RESERVED;
412 if (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B)
413 v |= ATP867X_IO_SYS_INFO_SLOW_UDMA5;
414 iowrite8(v, ATP867X_SYS_INFO(ap));
415}
416
417static int atp867x_ata_pci_sff_init_host(struct ata_host *host)
418{
419 struct device *gdev = host->dev;
420 struct pci_dev *pdev = to_pci_dev(gdev);
421 unsigned int mask = 0;
422 int i, rc;
423
424 /*
425 * do not map rombase
426 */
427 rc = pcim_iomap_regions(pdev, 1 << ATP867X_BAR_IOBASE, DRV_NAME);
428 if (rc == -EBUSY)
429 pcim_pin_device(pdev);
430 if (rc)
431 return rc;
432 host->iomap = pcim_iomap_table(pdev);
433
434#ifdef ATP867X_DEBUG
435 atp867x_check_res(pdev);
436
437 for (i = 0; i < PCI_ROM_RESOURCE; i++)
438 printk(KERN_DEBUG "ATP867X: iomap[%d]=0x%llx\n", i,
439 (unsigned long long)(host->iomap[i]));
440#endif
441
442 /*
443 * request, iomap BARs and init port addresses accordingly
444 */
445 for (i = 0; i < host->n_ports; i++) {
446 struct ata_port *ap = host->ports[i];
447 struct ata_ioports *ioaddr = &ap->ioaddr;
448
449 ioaddr->cmd_addr = ATP867X_IO_PORTBASE(ap, i);
450 ioaddr->ctl_addr = ioaddr->altstatus_addr
451 = ATP867X_IO_ALTSTATUS(ap, i);
452 ioaddr->bmdma_addr = ATP867X_IO_DMABASE(ap, i);
453
454 ata_sff_std_ports(ioaddr);
455 rc = atp867x_set_priv(ap);
456 if (rc)
457 return rc;
458
459#ifdef ATP867X_DEBUG
460 atp867x_check_ports(ap, i);
461#endif
462 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx",
463 (unsigned long)ioaddr->cmd_addr,
464 (unsigned long)ioaddr->ctl_addr);
465 ata_port_desc(ap, "bmdma 0x%lx",
466 (unsigned long)ioaddr->bmdma_addr);
467
468 mask |= 1 << i;
469 }
470
471 if (!mask) {
472 dev_err(gdev, "no available native port\n");
473 return -ENODEV;
474 }
475
476 atp867x_fixup(host);
477
478 rc = dma_set_mask(&pdev->dev, ATA_DMA_MASK);
479 if (rc)
480 return rc;
481
482 rc = dma_set_coherent_mask(&pdev->dev, ATA_DMA_MASK);
483 return rc;
484}
485
486static int atp867x_init_one(struct pci_dev *pdev,
487 const struct pci_device_id *id)
488{
489 static const struct ata_port_info info_867x = {
490 .flags = ATA_FLAG_SLAVE_POSS,
491 .pio_mask = ATA_PIO4,
492 .udma_mask = ATA_UDMA6,
493 .port_ops = &atp867x_ops,
494 };
495
496 struct ata_host *host;
497 const struct ata_port_info *ppi[] = { &info_867x, NULL };
498 int rc;
499
500 ata_print_version_once(&pdev->dev, DRV_VERSION);
501
502 rc = pcim_enable_device(pdev);
503 if (rc)
504 return rc;
505
506 printk(KERN_INFO "ATP867X: ATP867 ATA UDMA133 controller (rev %02X)",
507 pdev->device);
508
509 host = ata_host_alloc_pinfo(&pdev->dev, ppi, ATP867X_NUM_PORTS);
510 if (!host) {
511 dev_err(&pdev->dev, "failed to allocate ATA host\n");
512 rc = -ENOMEM;
513 goto err_out;
514 }
515
516 rc = atp867x_ata_pci_sff_init_host(host);
517 if (rc) {
518 dev_err(&pdev->dev, "failed to init host\n");
519 goto err_out;
520 }
521
522 pci_set_master(pdev);
523
524 rc = ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
525 IRQF_SHARED, &atp867x_sht);
526 if (rc)
527 dev_err(&pdev->dev, "failed to activate host\n");
528
529err_out:
530 return rc;
531}
532
533#ifdef CONFIG_PM_SLEEP
534static int atp867x_reinit_one(struct pci_dev *pdev)
535{
536 struct ata_host *host = pci_get_drvdata(pdev);
537 int rc;
538
539 rc = ata_pci_device_do_resume(pdev);
540 if (rc)
541 return rc;
542
543 atp867x_fixup(host);
544
545 ata_host_resume(host);
546 return 0;
547}
548#endif
549
550static struct pci_device_id atp867x_pci_tbl[] = {
551 { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867A), 0 },
552 { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867B), 0 },
553 { },
554};
555
556static struct pci_driver atp867x_driver = {
557 .name = DRV_NAME,
558 .id_table = atp867x_pci_tbl,
559 .probe = atp867x_init_one,
560 .remove = ata_pci_remove_one,
561#ifdef CONFIG_PM_SLEEP
562 .suspend = ata_pci_device_suspend,
563 .resume = atp867x_reinit_one,
564#endif
565};
566
567module_pci_driver(atp867x_driver);
568
569MODULE_AUTHOR("John(Jung-Ik) Lee, Google Inc.");
570MODULE_DESCRIPTION("low level driver for Artop/Acard 867x ATA controller");
571MODULE_LICENSE("GPL");
572MODULE_DEVICE_TABLE(pci, atp867x_pci_tbl);
573MODULE_VERSION(DRV_VERSION);