Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/ide/via82cxxx.c

  1 /*
  2  * VIA IDE driver for Linux. Supported southbridges:
  3  *
  4  *   vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
  5  *   vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
  6  *   vt8235, vt8237, vt8237a
  7  *
  8  * Copyright (c) 2000-2002 Vojtech Pavlik
  9  * Copyright (c) 2007-2010 Bartlomiej Zolnierkiewicz
 10  *
 11  * Based on the work of:
 12  *      Michel Aubry
 13  *      Jeff Garzik
 14  *      Andre Hedrick
 15  *
 16  * Documentation:
 17  *      Obsolete device documentation publicly available from via.com.tw
 18  *      Current device documentation available under NDA only
 19  */
 20 
 21 /*
 22  * This program is free software; you can redistribute it and/or modify it
 23  * under the terms of the GNU General Public License version 2 as published by
 24  * the Free Software Foundation.
 25  */
 26 
 27 #include <linux/module.h>
 28 #include <linux/kernel.h>
 29 #include <linux/slab.h>
 30 #include <linux/pci.h>
 31 #include <linux/init.h>
 32 #include <linux/ide.h>
 33 #include <linux/dmi.h>
 34 
 35 #ifdef CONFIG_PPC_CHRP
 36 #include <asm/processor.h>
 37 #endif
 38 
 39 #define DRV_NAME "via82cxxx"
 40 
 41 #define VIA_IDE_ENABLE          0x40
 42 #define VIA_IDE_CONFIG          0x41
 43 #define VIA_FIFO_CONFIG         0x43
 44 #define VIA_MISC_1              0x44
 45 #define VIA_MISC_2              0x45
 46 #define VIA_MISC_3              0x46
 47 #define VIA_DRIVE_TIMING        0x48
 48 #define VIA_8BIT_TIMING         0x4e
 49 #define VIA_ADDRESS_SETUP       0x4c
 50 #define VIA_UDMA_TIMING         0x50
 51 
 52 #define VIA_BAD_PREQ            0x01 /* Crashes if PREQ# till DDACK# set */
 53 #define VIA_BAD_CLK66           0x02 /* 66 MHz clock doesn't work correctly */
 54 #define VIA_SET_FIFO            0x04 /* Needs to have FIFO split set */
 55 #define VIA_NO_UNMASK           0x08 /* Doesn't work with IRQ unmasking on */
 56 #define VIA_BAD_ID              0x10 /* Has wrong vendor ID (0x1107) */
 57 #define VIA_BAD_AST             0x20 /* Don't touch Address Setup Timing */
 58 #define VIA_SATA_PATA           0x80 /* SATA/PATA combined configuration */
 59 
 60 enum {
 61         VIA_IDFLAG_SINGLE = (1 << 1), /* single channel controller */
 62 };
 63 
 64 /*
 65  * VIA SouthBridge chips.
 66  */
 67 
 68 static struct via_isa_bridge {
 69         char *name;
 70         u16 id;
 71         u8 rev_min;
 72         u8 rev_max;
 73         u8 udma_mask;
 74         u8 flags;
 75 } via_isa_bridges[] = {
 76         { "vx855",      PCI_DEVICE_ID_VIA_VX855,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
 77         { "vx800",      PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
 78         { "cx700",      PCI_DEVICE_ID_VIA_CX700,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
 79         { "vt8261",     PCI_DEVICE_ID_VIA_8261,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
 80         { "vt8237s",    PCI_DEVICE_ID_VIA_8237S,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
 81         { "vt6410",     PCI_DEVICE_ID_VIA_6410,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
 82         { "vt6415",     PCI_DEVICE_ID_VIA_6415,     0x00, 0xff, ATA_UDMA6, VIA_BAD_AST },
 83         { "vt8251",     PCI_DEVICE_ID_VIA_8251,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
 84         { "vt8237",     PCI_DEVICE_ID_VIA_8237,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
 85         { "vt8237a",    PCI_DEVICE_ID_VIA_8237A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
 86         { "vt8235",     PCI_DEVICE_ID_VIA_8235,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
 87         { "vt8233a",    PCI_DEVICE_ID_VIA_8233A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
 88         { "vt8233c",    PCI_DEVICE_ID_VIA_8233C_0,  0x00, 0x2f, ATA_UDMA5, },
 89         { "vt8233",     PCI_DEVICE_ID_VIA_8233_0,   0x00, 0x2f, ATA_UDMA5, },
 90         { "vt8231",     PCI_DEVICE_ID_VIA_8231,     0x00, 0x2f, ATA_UDMA5, },
 91         { "vt82c686b",  PCI_DEVICE_ID_VIA_82C686,   0x40, 0x4f, ATA_UDMA5, },
 92         { "vt82c686a",  PCI_DEVICE_ID_VIA_82C686,   0x10, 0x2f, ATA_UDMA4, },
 93         { "vt82c686",   PCI_DEVICE_ID_VIA_82C686,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
 94         { "vt82c596b",  PCI_DEVICE_ID_VIA_82C596,   0x10, 0x2f, ATA_UDMA4, },
 95         { "vt82c596a",  PCI_DEVICE_ID_VIA_82C596,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
 96         { "vt82c586b",  PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
 97         { "vt82c586b",  PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
 98         { "vt82c586b",  PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
 99         { "vt82c586a",  PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
100         { "vt82c586",   PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f,      0x00, VIA_SET_FIFO },
101         { "vt82c576",   PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
102         { "vt82c576",   PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
103         { "vtxxxx",     PCI_DEVICE_ID_VIA_ANON,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
104         { NULL }
105 };
106 
107 static unsigned int via_clock;
108 static char *via_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
109 
110 struct via82cxxx_dev
111 {
112         struct via_isa_bridge *via_config;
113         unsigned int via_80w;
114 };
115 
116 /**
117  *      via_set_speed                   -       write timing registers
118  *      @dev: PCI device
119  *      @dn: device
120  *      @timing: IDE timing data to use
121  *
122  *      via_set_speed writes timing values to the chipset registers
123  */
124 
125 static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing)
126 {
127         struct pci_dev *dev = to_pci_dev(hwif->dev);
128         struct ide_host *host = pci_get_drvdata(dev);
129         struct via82cxxx_dev *vdev = host->host_priv;
130         u8 t;
131 
132         if (~vdev->via_config->flags & VIA_BAD_AST) {
133                 pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
134                 t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
135                 pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
136         }
137 
138         pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
139                 ((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1));
140 
141         pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
142                 ((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1));
143 
144         switch (vdev->via_config->udma_mask) {
145         case ATA_UDMA2: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
146         case ATA_UDMA4: t = timing->udma ? (0xe8 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x0f; break;
147         case ATA_UDMA5: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
148         case ATA_UDMA6: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
149         }
150 
151         /* Set UDMA unless device is not UDMA capable */
152         if (vdev->via_config->udma_mask) {
153                 u8 udma_etc;
154 
155                 pci_read_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, &udma_etc);
156 
157                 /* clear transfer mode bit */
158                 udma_etc &= ~0x20;
159 
160                 if (timing->udma) {
161                         /* preserve 80-wire cable detection bit */
162                         udma_etc &= 0x10;
163                         udma_etc |= t;
164                 }
165 
166                 pci_write_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, udma_etc);
167         }
168 }
169 
170 /**
171  *      via_set_drive           -       configure transfer mode
172  *      @hwif: port
173  *      @drive: Drive to set up
174  *
175  *      via_set_drive() computes timing values configures the chipset to
176  *      a desired transfer mode.  It also can be called by upper layers.
177  */
178 
179 static void via_set_drive(ide_hwif_t *hwif, ide_drive_t *drive)
180 {
181         ide_drive_t *peer = ide_get_pair_dev(drive);
182         struct pci_dev *dev = to_pci_dev(hwif->dev);
183         struct ide_host *host = pci_get_drvdata(dev);
184         struct via82cxxx_dev *vdev = host->host_priv;
185         struct ide_timing t, p;
186         unsigned int T, UT;
187         const u8 speed = drive->dma_mode;
188 
189         T = 1000000000 / via_clock;
190 
191         switch (vdev->via_config->udma_mask) {
192         case ATA_UDMA2: UT = T;   break;
193         case ATA_UDMA4: UT = T/2; break;
194         case ATA_UDMA5: UT = T/3; break;
195         case ATA_UDMA6: UT = T/4; break;
196         default:        UT = T;
197         }
198 
199         ide_timing_compute(drive, speed, &t, T, UT);
200 
201         if (peer) {
202                 ide_timing_compute(peer, peer->pio_mode, &p, T, UT);
203                 ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
204         }
205 
206         via_set_speed(hwif, drive->dn, &t);
207 }
208 
209 /**
210  *      via_set_pio_mode        -       set host controller for PIO mode
211  *      @hwif: port
212  *      @drive: drive
213  *
214  *      A callback from the upper layers for PIO-only tuning.
215  */
216 
217 static void via_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
218 {
219         drive->dma_mode = drive->pio_mode;
220         via_set_drive(hwif, drive);
221 }
222 
223 static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
224 {
225         struct via_isa_bridge *via_config;
226 
227         for (via_config = via_isa_bridges;
228              via_config->id != PCI_DEVICE_ID_VIA_ANON; via_config++)
229                 if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
230                         !!(via_config->flags & VIA_BAD_ID),
231                         via_config->id, NULL))) {
232 
233                         if ((*isa)->revision >= via_config->rev_min &&
234                             (*isa)->revision <= via_config->rev_max)
235                                 break;
236                         pci_dev_put(*isa);
237                 }
238 
239         return via_config;
240 }
241 
242 /*
243  * Check and handle 80-wire cable presence
244  */
245 static void via_cable_detect(struct via82cxxx_dev *vdev, u32 u)
246 {
247         int i;
248 
249         switch (vdev->via_config->udma_mask) {
250                 case ATA_UDMA4:
251                         for (i = 24; i >= 0; i -= 8)
252                                 if (((u >> (i & 16)) & 8) &&
253                                     ((u >> i) & 0x20) &&
254                                      (((u >> i) & 7) < 2)) {
255                                         /*
256                                          * 2x PCI clock and
257                                          * UDMA w/ < 3T/cycle
258                                          */
259                                         vdev->via_80w |= (1 << (1 - (i >> 4)));
260                                 }
261                         break;
262 
263                 case ATA_UDMA5:
264                         for (i = 24; i >= 0; i -= 8)
265                                 if (((u >> i) & 0x10) ||
266                                     (((u >> i) & 0x20) &&
267                                      (((u >> i) & 7) < 4))) {
268                                         /* BIOS 80-wire bit or
269                                          * UDMA w/ < 60ns/cycle
270                                          */
271                                         vdev->via_80w |= (1 << (1 - (i >> 4)));
272                                 }
273                         break;
274 
275                 case ATA_UDMA6:
276                         for (i = 24; i >= 0; i -= 8)
277                                 if (((u >> i) & 0x10) ||
278                                     (((u >> i) & 0x20) &&
279                                      (((u >> i) & 7) < 6))) {
280                                         /* BIOS 80-wire bit or
281                                          * UDMA w/ < 60ns/cycle
282                                          */
283                                         vdev->via_80w |= (1 << (1 - (i >> 4)));
284                                 }
285                         break;
286         }
287 }
288 
289 /**
290  *      init_chipset_via82cxxx  -       initialization handler
291  *      @dev: PCI device
292  *
293  *      The initialization callback. Here we determine the IDE chip type
294  *      and initialize its drive independent registers.
295  */
296 
297 static int init_chipset_via82cxxx(struct pci_dev *dev)
298 {
299         struct ide_host *host = pci_get_drvdata(dev);
300         struct via82cxxx_dev *vdev = host->host_priv;
301         struct via_isa_bridge *via_config = vdev->via_config;
302         u8 t, v;
303         u32 u;
304 
305         /*
306          * Detect cable and configure Clk66
307          */
308         pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
309 
310         via_cable_detect(vdev, u);
311 
312         if (via_config->udma_mask == ATA_UDMA4) {
313                 /* Enable Clk66 */
314                 pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
315         } else if (via_config->flags & VIA_BAD_CLK66) {
316                 /* Would cause trouble on 596a and 686 */
317                 pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
318         }
319 
320         /*
321          * Check whether interfaces are enabled.
322          */
323 
324         pci_read_config_byte(dev, VIA_IDE_ENABLE, &v);
325 
326         /*
327          * Set up FIFO sizes and thresholds.
328          */
329 
330         pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);
331 
332         /* Disable PREQ# till DDACK# */
333         if (via_config->flags & VIA_BAD_PREQ) {
334                 /* Would crash on 586b rev 41 */
335                 t &= 0x7f;
336         }
337 
338         /* Fix FIFO split between channels */
339         if (via_config->flags & VIA_SET_FIFO) {
340                 t &= (t & 0x9f);
341                 switch (v & 3) {
342                         case 2: t |= 0x00; break;       /* 16 on primary */
343                         case 1: t |= 0x60; break;       /* 16 on secondary */
344                         case 3: t |= 0x20; break;       /* 8 pri 8 sec */
345                 }
346         }
347 
348         pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
349 
350         return 0;
351 }
352 
353 /*
354  *      Cable special cases
355  */
356 
357 static const struct dmi_system_id cable_dmi_table[] = {
358         {
359                 .ident = "Acer Ferrari 3400",
360                 .matches = {
361                         DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
362                         DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
363                 },
364         },
365         { }
366 };
367 
368 static int via_cable_override(struct pci_dev *pdev)
369 {
370         /* Systems by DMI */
371         if (dmi_check_system(cable_dmi_table))
372                 return 1;
373 
374         /* Arima W730-K8/Targa Visionary 811/... */
375         if (pdev->subsystem_vendor == 0x161F &&
376             pdev->subsystem_device == 0x2032)
377                 return 1;
378 
379         return 0;
380 }
381 
382 static u8 via82cxxx_cable_detect(ide_hwif_t *hwif)
383 {
384         struct pci_dev *pdev = to_pci_dev(hwif->dev);
385         struct ide_host *host = pci_get_drvdata(pdev);
386         struct via82cxxx_dev *vdev = host->host_priv;
387 
388         if (via_cable_override(pdev))
389                 return ATA_CBL_PATA40_SHORT;
390 
391         if ((vdev->via_config->flags & VIA_SATA_PATA) && hwif->channel == 0)
392                 return ATA_CBL_SATA;
393 
394         if ((vdev->via_80w >> hwif->channel) & 1)
395                 return ATA_CBL_PATA80;
396         else
397                 return ATA_CBL_PATA40;
398 }
399 
400 static const struct ide_port_ops via_port_ops = {
401         .set_pio_mode           = via_set_pio_mode,
402         .set_dma_mode           = via_set_drive,
403         .cable_detect           = via82cxxx_cable_detect,
404 };
405 
406 static const struct ide_port_info via82cxxx_chipset = {
407         .name           = DRV_NAME,
408         .init_chipset   = init_chipset_via82cxxx,
409         .enablebits     = { { 0x40, 0x02, 0x02 }, { 0x40, 0x01, 0x01 } },
410         .port_ops       = &via_port_ops,
411         .host_flags     = IDE_HFLAG_PIO_NO_BLACKLIST |
412                           IDE_HFLAG_POST_SET_MODE |
413                           IDE_HFLAG_IO_32BIT,
414         .pio_mask       = ATA_PIO5,
415         .swdma_mask     = ATA_SWDMA2,
416         .mwdma_mask     = ATA_MWDMA2,
417 };
418 
419 static int via_init_one(struct pci_dev *dev, const struct pci_device_id *id)
420 {
421         struct pci_dev *isa = NULL;
422         struct via_isa_bridge *via_config;
423         struct via82cxxx_dev *vdev;
424         int rc;
425         u8 idx = id->driver_data;
426         struct ide_port_info d;
427 
428         d = via82cxxx_chipset;
429 
430         /*
431          * Find the ISA bridge and check we know what it is.
432          */
433         via_config = via_config_find(&isa);
434 
435         /*
436          * Print the boot message.
437          */
438         printk(KERN_INFO DRV_NAME " %s: VIA %s (rev %02x) IDE %sDMA%s\n",
439                 pci_name(dev), via_config->name, isa->revision,
440                 via_config->udma_mask ? "U" : "MW",
441                 via_dma[via_config->udma_mask ?
442                         (fls(via_config->udma_mask) - 1) : 0]);
443 
444         pci_dev_put(isa);
445 
446         /*
447          * Determine system bus clock.
448          */
449         via_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;
450 
451         switch (via_clock) {
452         case 33000: via_clock = 33333; break;
453         case 37000: via_clock = 37500; break;
454         case 41000: via_clock = 41666; break;
455         }
456 
457         if (via_clock < 20000 || via_clock > 50000) {
458                 printk(KERN_WARNING DRV_NAME ": User given PCI clock speed "
459                         "impossible (%d), using 33 MHz instead.\n", via_clock);
460                 via_clock = 33333;
461         }
462 
463         if (idx == 1)
464                 d.enablebits[1].reg = d.enablebits[0].reg = 0;
465         else
466                 d.host_flags |= IDE_HFLAG_NO_AUTODMA;
467 
468         if (idx == VIA_IDFLAG_SINGLE)
469                 d.host_flags |= IDE_HFLAG_SINGLE;
470 
471         if ((via_config->flags & VIA_NO_UNMASK) == 0)
472                 d.host_flags |= IDE_HFLAG_UNMASK_IRQS;
473 
474         d.udma_mask = via_config->udma_mask;
475 
476         vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
477         if (!vdev) {
478                 printk(KERN_ERR DRV_NAME " %s: out of memory :(\n",
479                         pci_name(dev));
480                 return -ENOMEM;
481         }
482 
483         vdev->via_config = via_config;
484 
485         rc = ide_pci_init_one(dev, &d, vdev);
486         if (rc)
487                 kfree(vdev);
488 
489         return rc;
490 }
491 
492 static void via_remove(struct pci_dev *dev)
493 {
494         struct ide_host *host = pci_get_drvdata(dev);
495         struct via82cxxx_dev *vdev = host->host_priv;
496 
497         ide_pci_remove(dev);
498         kfree(vdev);
499 }
500 
501 static const struct pci_device_id via_pci_tbl[] = {
502         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1),  0 },
503         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1),  0 },
504         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_CX700_IDE), 0 },
505         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_VX855_IDE), VIA_IDFLAG_SINGLE },
506         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410),      1 },
507         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6415),      1 },
508         { PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), 1 },
509         { 0, },
510 };
511 MODULE_DEVICE_TABLE(pci, via_pci_tbl);
512 
513 static struct pci_driver via_pci_driver = {
514         .name           = "VIA_IDE",
515         .id_table       = via_pci_tbl,
516         .probe          = via_init_one,
517         .remove         = via_remove,
518         .suspend        = ide_pci_suspend,
519         .resume         = ide_pci_resume,
520 };
521 
522 static int __init via_ide_init(void)
523 {
524         return ide_pci_register_driver(&via_pci_driver);
525 }
526 
527 static void __exit via_ide_exit(void)
528 {
529         pci_unregister_driver(&via_pci_driver);
530 }
531 
532 module_init(via_ide_init);
533 module_exit(via_ide_exit);
534 
535 MODULE_AUTHOR("Vojtech Pavlik, Bartlomiej Zolnierkiewicz, Michel Aubry, Jeff Garzik, Andre Hedrick");
536 MODULE_DESCRIPTION("PCI driver module for VIA IDE");
537 MODULE_LICENSE("GPL");
538 

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