Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
[linux-2.6] / drivers / ide / ppc / scc_pata.c
1 /*
2  * Support for IDE interfaces on Celleb platform
3  *
4  * (C) Copyright 2006 TOSHIBA CORPORATION
5  *
6  * This code is based on drivers/ide/pci/siimage.c:
7  * Copyright (C) 2001-2002      Andre Hedrick <andre@linux-ide.org>
8  * Copyright (C) 2003           Red Hat <alan@redhat.com>
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 along
21  * with this program; if not, write to the Free Software Foundation, Inc.,
22  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23  */
24
25 #include <linux/types.h>
26 #include <linux/module.h>
27 #include <linux/pci.h>
28 #include <linux/delay.h>
29 #include <linux/hdreg.h>
30 #include <linux/ide.h>
31 #include <linux/init.h>
32
33 #define PCI_DEVICE_ID_TOSHIBA_SCC_ATA            0x01b4
34
35 #define SCC_PATA_NAME           "scc IDE"
36
37 #define TDVHSEL_MASTER          0x00000001
38 #define TDVHSEL_SLAVE           0x00000004
39
40 #define MODE_JCUSFEN            0x00000080
41
42 #define CCKCTRL_ATARESET        0x00040000
43 #define CCKCTRL_BUFCNT          0x00020000
44 #define CCKCTRL_CRST            0x00010000
45 #define CCKCTRL_OCLKEN          0x00000100
46 #define CCKCTRL_ATACLKOEN       0x00000002
47 #define CCKCTRL_LCLKEN          0x00000001
48
49 #define QCHCD_IOS_SS            0x00000001
50
51 #define QCHSD_STPDIAG           0x00020000
52
53 #define INTMASK_MSK             0xD1000012
54 #define INTSTS_SERROR           0x80000000
55 #define INTSTS_PRERR            0x40000000
56 #define INTSTS_RERR             0x10000000
57 #define INTSTS_ICERR            0x01000000
58 #define INTSTS_BMSINT           0x00000010
59 #define INTSTS_BMHE             0x00000008
60 #define INTSTS_IOIRQS           0x00000004
61 #define INTSTS_INTRQ            0x00000002
62 #define INTSTS_ACTEINT          0x00000001
63
64 #define ECMODE_VALUE 0x01
65
66 static struct scc_ports {
67         unsigned long ctl, dma;
68         unsigned char hwif_id;  /* for removing hwif from system */
69 } scc_ports[MAX_HWIFS];
70
71 /* PIO transfer mode  table */
72 /* JCHST */
73 static unsigned long JCHSTtbl[2][7] = {
74         {0x0E, 0x05, 0x02, 0x03, 0x02, 0x00, 0x00},   /* 100MHz */
75         {0x13, 0x07, 0x04, 0x04, 0x03, 0x00, 0x00}    /* 133MHz */
76 };
77
78 /* JCHHT */
79 static unsigned long JCHHTtbl[2][7] = {
80         {0x0E, 0x02, 0x02, 0x02, 0x02, 0x00, 0x00},   /* 100MHz */
81         {0x13, 0x03, 0x03, 0x03, 0x03, 0x00, 0x00}    /* 133MHz */
82 };
83
84 /* JCHCT */
85 static unsigned long JCHCTtbl[2][7] = {
86         {0x1D, 0x1D, 0x1C, 0x0B, 0x06, 0x00, 0x00},   /* 100MHz */
87         {0x27, 0x26, 0x26, 0x0E, 0x09, 0x00, 0x00}    /* 133MHz */
88 };
89
90
91 /* DMA transfer mode  table */
92 /* JCHDCTM/JCHDCTS */
93 static unsigned long JCHDCTxtbl[2][7] = {
94         {0x0A, 0x06, 0x04, 0x03, 0x01, 0x00, 0x00},   /* 100MHz */
95         {0x0E, 0x09, 0x06, 0x04, 0x02, 0x01, 0x00}    /* 133MHz */
96 };
97
98 /* JCSTWTM/JCSTWTS  */
99 static unsigned long JCSTWTxtbl[2][7] = {
100         {0x06, 0x04, 0x03, 0x02, 0x02, 0x02, 0x00},   /* 100MHz */
101         {0x09, 0x06, 0x04, 0x02, 0x02, 0x02, 0x02}    /* 133MHz */
102 };
103
104 /* JCTSS */
105 static unsigned long JCTSStbl[2][7] = {
106         {0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x00},   /* 100MHz */
107         {0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05}    /* 133MHz */
108 };
109
110 /* JCENVT */
111 static unsigned long JCENVTtbl[2][7] = {
112         {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00},   /* 100MHz */
113         {0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02}    /* 133MHz */
114 };
115
116 /* JCACTSELS/JCACTSELM */
117 static unsigned long JCACTSELtbl[2][7] = {
118         {0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00},   /* 100MHz */
119         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}    /* 133MHz */
120 };
121
122
123 static u8 scc_ide_inb(unsigned long port)
124 {
125         u32 data = in_be32((void*)port);
126         return (u8)data;
127 }
128
129 static u16 scc_ide_inw(unsigned long port)
130 {
131         u32 data = in_be32((void*)port);
132         return (u16)data;
133 }
134
135 static void scc_ide_insw(unsigned long port, void *addr, u32 count)
136 {
137         u16 *ptr = (u16 *)addr;
138         while (count--) {
139                 *ptr++ = le16_to_cpu(in_be32((void*)port));
140         }
141 }
142
143 static void scc_ide_insl(unsigned long port, void *addr, u32 count)
144 {
145         u16 *ptr = (u16 *)addr;
146         while (count--) {
147                 *ptr++ = le16_to_cpu(in_be32((void*)port));
148                 *ptr++ = le16_to_cpu(in_be32((void*)port));
149         }
150 }
151
152 static void scc_ide_outb(u8 addr, unsigned long port)
153 {
154         out_be32((void*)port, addr);
155 }
156
157 static void scc_ide_outw(u16 addr, unsigned long port)
158 {
159         out_be32((void*)port, addr);
160 }
161
162 static void
163 scc_ide_outbsync(ide_drive_t * drive, u8 addr, unsigned long port)
164 {
165         ide_hwif_t *hwif = HWIF(drive);
166
167         out_be32((void*)port, addr);
168         __asm__ __volatile__("eieio":::"memory");
169         in_be32((void*)(hwif->dma_base + 0x01c));
170         __asm__ __volatile__("eieio":::"memory");
171 }
172
173 static void
174 scc_ide_outsw(unsigned long port, void *addr, u32 count)
175 {
176         u16 *ptr = (u16 *)addr;
177         while (count--) {
178                 out_be32((void*)port, cpu_to_le16(*ptr++));
179         }
180 }
181
182 static void
183 scc_ide_outsl(unsigned long port, void *addr, u32 count)
184 {
185         u16 *ptr = (u16 *)addr;
186         while (count--) {
187                 out_be32((void*)port, cpu_to_le16(*ptr++));
188                 out_be32((void*)port, cpu_to_le16(*ptr++));
189         }
190 }
191
192 /**
193  *      scc_ratemask    -       Compute available modes
194  *      @drive: IDE drive
195  *
196  *      Compute the available speeds for the devices on the interface.
197  *      Enforce UDMA33 as a limit if there is no 80pin cable present.
198  */
199
200 static u8 scc_ratemask(ide_drive_t *drive)
201 {
202         u8 mode = 4;
203
204         if (!eighty_ninty_three(drive))
205                 mode = min(mode, (u8)1);
206         return mode;
207 }
208
209 /**
210  *      scc_tuneproc    -       tune a drive PIO mode
211  *      @drive: drive to tune
212  *      @mode_wanted: the target operating mode
213  *
214  *      Load the timing settings for this device mode into the
215  *      controller.
216  */
217
218 static void scc_tuneproc(ide_drive_t *drive, byte mode_wanted)
219 {
220         ide_hwif_t *hwif = HWIF(drive);
221         struct scc_ports *ports = ide_get_hwifdata(hwif);
222         unsigned long ctl_base = ports->ctl;
223         unsigned long cckctrl_port = ctl_base + 0xff0;
224         unsigned long piosht_port = ctl_base + 0x000;
225         unsigned long pioct_port = ctl_base + 0x004;
226         unsigned long reg;
227         unsigned char speed = XFER_PIO_0;
228         int offset;
229
230         mode_wanted = ide_get_best_pio_mode(drive, mode_wanted, 4, NULL);
231         switch (mode_wanted) {
232         case 4:
233                 speed = XFER_PIO_4;
234                 break;
235         case 3:
236                 speed = XFER_PIO_3;
237                 break;
238         case 2:
239                 speed = XFER_PIO_2;
240                 break;
241         case 1:
242                 speed = XFER_PIO_1;
243                 break;
244         case 0:
245         default:
246                 speed = XFER_PIO_0;
247                 break;
248         }
249
250         reg = in_be32((void __iomem *)cckctrl_port);
251         if (reg & CCKCTRL_ATACLKOEN) {
252                 offset = 1; /* 133MHz */
253         } else {
254                 offset = 0; /* 100MHz */
255         }
256         reg = JCHSTtbl[offset][mode_wanted] << 16 | JCHHTtbl[offset][mode_wanted];
257         out_be32((void __iomem *)piosht_port, reg);
258         reg = JCHCTtbl[offset][mode_wanted];
259         out_be32((void __iomem *)pioct_port, reg);
260
261         ide_config_drive_speed(drive, speed);
262 }
263
264 /**
265  *      scc_tune_chipset        -       tune a drive DMA mode
266  *      @drive: Drive to set up
267  *      @xferspeed: speed we want to achieve
268  *
269  *      Load the timing settings for this device mode into the
270  *      controller.
271  */
272
273 static int scc_tune_chipset(ide_drive_t *drive, byte xferspeed)
274 {
275         ide_hwif_t *hwif = HWIF(drive);
276         u8 speed = ide_rate_filter(scc_ratemask(drive), xferspeed);
277         struct scc_ports *ports = ide_get_hwifdata(hwif);
278         unsigned long ctl_base = ports->ctl;
279         unsigned long cckctrl_port = ctl_base + 0xff0;
280         unsigned long mdmact_port = ctl_base + 0x008;
281         unsigned long mcrcst_port = ctl_base + 0x00c;
282         unsigned long sdmact_port = ctl_base + 0x010;
283         unsigned long scrcst_port = ctl_base + 0x014;
284         unsigned long udenvt_port = ctl_base + 0x018;
285         unsigned long tdvhsel_port   = ctl_base + 0x020;
286         int is_slave = (&hwif->drives[1] == drive);
287         int offset, idx;
288         unsigned long reg;
289         unsigned long jcactsel;
290
291         reg = in_be32((void __iomem *)cckctrl_port);
292         if (reg & CCKCTRL_ATACLKOEN) {
293                 offset = 1; /* 133MHz */
294         } else {
295                 offset = 0; /* 100MHz */
296         }
297
298         switch (speed) {
299         case XFER_UDMA_6:
300                 idx = 6;
301                 break;
302         case XFER_UDMA_5:
303                 idx = 5;
304                 break;
305         case XFER_UDMA_4:
306                 idx = 4;
307                 break;
308         case XFER_UDMA_3:
309                 idx = 3;
310                 break;
311         case XFER_UDMA_2:
312                 idx = 2;
313                 break;
314         case XFER_UDMA_1:
315                 idx = 1;
316                 break;
317         case XFER_UDMA_0:
318                 idx = 0;
319                 break;
320         default:
321                 return 1;
322         }
323
324         jcactsel = JCACTSELtbl[offset][idx];
325         if (is_slave) {
326                 out_be32((void __iomem *)sdmact_port, JCHDCTxtbl[offset][idx]);
327                 out_be32((void __iomem *)scrcst_port, JCSTWTxtbl[offset][idx]);
328                 jcactsel = jcactsel << 2;
329                 out_be32((void __iomem *)tdvhsel_port, (in_be32((void __iomem *)tdvhsel_port) & ~TDVHSEL_SLAVE) | jcactsel);
330         } else {
331                 out_be32((void __iomem *)mdmact_port, JCHDCTxtbl[offset][idx]);
332                 out_be32((void __iomem *)mcrcst_port, JCSTWTxtbl[offset][idx]);
333                 out_be32((void __iomem *)tdvhsel_port, (in_be32((void __iomem *)tdvhsel_port) & ~TDVHSEL_MASTER) | jcactsel);
334         }
335         reg = JCTSStbl[offset][idx] << 16 | JCENVTtbl[offset][idx];
336         out_be32((void __iomem *)udenvt_port, reg);
337
338         return ide_config_drive_speed(drive, speed);
339 }
340
341 /**
342  *      scc_config_chipset_for_dma      -       configure for DMA
343  *      @drive: drive to configure
344  *
345  *      Called by scc_config_drive_for_dma().
346  */
347
348 static int scc_config_chipset_for_dma(ide_drive_t *drive)
349 {
350         u8 speed = ide_dma_speed(drive, scc_ratemask(drive));
351
352         if (!speed)
353                 return 0;
354
355         if (scc_tune_chipset(drive, speed))
356                 return 0;
357
358         return ide_dma_enable(drive);
359 }
360
361 /**
362  *      scc_configure_drive_for_dma     -       set up for DMA transfers
363  *      @drive: drive we are going to set up
364  *
365  *      Set up the drive for DMA, tune the controller and drive as
366  *      required.
367  *      If the drive isn't suitable for DMA or we hit other problems
368  *      then we will drop down to PIO and set up PIO appropriately.
369  *      (return 1)
370  */
371
372 static int scc_config_drive_for_dma(ide_drive_t *drive)
373 {
374         if (ide_use_dma(drive) && scc_config_chipset_for_dma(drive))
375                 return 0;
376
377         if (ide_use_fast_pio(drive))
378                 scc_tuneproc(drive, 4);
379
380         return -1;
381 }
382
383 /**
384  *      scc_ide_dma_setup       -       begin a DMA phase
385  *      @drive: target device
386  *
387  *      Build an IDE DMA PRD (IDE speak for scatter gather table)
388  *      and then set up the DMA transfer registers.
389  *
390  *      Returns 0 on success. If a PIO fallback is required then 1
391  *      is returned.
392  */
393
394 static int scc_dma_setup(ide_drive_t *drive)
395 {
396         ide_hwif_t *hwif = drive->hwif;
397         struct request *rq = HWGROUP(drive)->rq;
398         unsigned int reading;
399         u8 dma_stat;
400
401         if (rq_data_dir(rq))
402                 reading = 0;
403         else
404                 reading = 1 << 3;
405
406         /* fall back to pio! */
407         if (!ide_build_dmatable(drive, rq)) {
408                 ide_map_sg(drive, rq);
409                 return 1;
410         }
411
412         /* PRD table */
413         out_be32((void __iomem *)hwif->dma_prdtable, hwif->dmatable_dma);
414
415         /* specify r/w */
416         out_be32((void __iomem *)hwif->dma_command, reading);
417
418         /* read dma_status for INTR & ERROR flags */
419         dma_stat = in_be32((void __iomem *)hwif->dma_status);
420
421         /* clear INTR & ERROR flags */
422         out_be32((void __iomem *)hwif->dma_status, dma_stat|6);
423         drive->waiting_for_dma = 1;
424         return 0;
425 }
426
427
428 /**
429  *      scc_ide_dma_end -       Stop DMA
430  *      @drive: IDE drive
431  *
432  *      Check and clear INT Status register.
433  *      Then call __ide_dma_end().
434  */
435
436 static int scc_ide_dma_end(ide_drive_t * drive)
437 {
438         ide_hwif_t *hwif = HWIF(drive);
439         unsigned long intsts_port = hwif->dma_base + 0x014;
440         u32 reg;
441
442         while (1) {
443                 reg = in_be32((void __iomem *)intsts_port);
444
445                 if (reg & INTSTS_SERROR) {
446                         printk(KERN_WARNING "%s: SERROR\n", SCC_PATA_NAME);
447                         out_be32((void __iomem *)intsts_port, INTSTS_SERROR|INTSTS_BMSINT);
448
449                         out_be32((void __iomem *)hwif->dma_command, in_be32((void __iomem *)hwif->dma_command) & ~QCHCD_IOS_SS);
450                         continue;
451                 }
452
453                 if (reg & INTSTS_PRERR) {
454                         u32 maea0, maec0;
455                         unsigned long ctl_base = hwif->config_data;
456
457                         maea0 = in_be32((void __iomem *)(ctl_base + 0xF50));
458                         maec0 = in_be32((void __iomem *)(ctl_base + 0xF54));
459
460                         printk(KERN_WARNING "%s: PRERR [addr:%x cmd:%x]\n", SCC_PATA_NAME, maea0, maec0);
461
462                         out_be32((void __iomem *)intsts_port, INTSTS_PRERR|INTSTS_BMSINT);
463
464                         out_be32((void __iomem *)hwif->dma_command, in_be32((void __iomem *)hwif->dma_command) & ~QCHCD_IOS_SS);
465                         continue;
466                 }
467
468                 if (reg & INTSTS_RERR) {
469                         printk(KERN_WARNING "%s: Response Error\n", SCC_PATA_NAME);
470                         out_be32((void __iomem *)intsts_port, INTSTS_RERR|INTSTS_BMSINT);
471
472                         out_be32((void __iomem *)hwif->dma_command, in_be32((void __iomem *)hwif->dma_command) & ~QCHCD_IOS_SS);
473                         continue;
474                 }
475
476                 if (reg & INTSTS_ICERR) {
477                         out_be32((void __iomem *)hwif->dma_command, in_be32((void __iomem *)hwif->dma_command) & ~QCHCD_IOS_SS);
478
479                         printk(KERN_WARNING "%s: Illegal Configuration\n", SCC_PATA_NAME);
480                         out_be32((void __iomem *)intsts_port, INTSTS_ICERR|INTSTS_BMSINT);
481                         continue;
482                 }
483
484                 if (reg & INTSTS_BMSINT) {
485                         printk(KERN_WARNING "%s: Internal Bus Error\n", SCC_PATA_NAME);
486                         out_be32((void __iomem *)intsts_port, INTSTS_BMSINT);
487
488                         ide_do_reset(drive);
489                         continue;
490                 }
491
492                 if (reg & INTSTS_BMHE) {
493                         out_be32((void __iomem *)intsts_port, INTSTS_BMHE);
494                         continue;
495                 }
496
497                 if (reg & INTSTS_ACTEINT) {
498                         out_be32((void __iomem *)intsts_port, INTSTS_ACTEINT);
499                         continue;
500                 }
501
502                 if (reg & INTSTS_IOIRQS) {
503                         out_be32((void __iomem *)intsts_port, INTSTS_IOIRQS);
504                         continue;
505                 }
506                 break;
507         }
508
509         return __ide_dma_end(drive);
510 }
511
512 /**
513  *      setup_mmio_scc  -       map CTRL/BMID region
514  *      @dev: PCI device we are configuring
515  *      @name: device name
516  *
517  */
518
519 static int setup_mmio_scc (struct pci_dev *dev, const char *name)
520 {
521         unsigned long ctl_base = pci_resource_start(dev, 0);
522         unsigned long dma_base = pci_resource_start(dev, 1);
523         unsigned long ctl_size = pci_resource_len(dev, 0);
524         unsigned long dma_size = pci_resource_len(dev, 1);
525         void *ctl_addr;
526         void *dma_addr;
527         int i;
528
529         for (i = 0; i < MAX_HWIFS; i++) {
530                 if (scc_ports[i].ctl == 0)
531                         break;
532         }
533         if (i >= MAX_HWIFS)
534                 return -ENOMEM;
535
536         if (!request_mem_region(ctl_base, ctl_size, name)) {
537                 printk(KERN_WARNING "%s: IDE controller MMIO ports not available.\n", SCC_PATA_NAME);
538                 goto fail_0;
539         }
540
541         if (!request_mem_region(dma_base, dma_size, name)) {
542                 printk(KERN_WARNING "%s: IDE controller MMIO ports not available.\n", SCC_PATA_NAME);
543                 goto fail_1;
544         }
545
546         if ((ctl_addr = ioremap(ctl_base, ctl_size)) == NULL)
547                 goto fail_2;
548
549         if ((dma_addr = ioremap(dma_base, dma_size)) == NULL)
550                 goto fail_3;
551
552         pci_set_master(dev);
553         scc_ports[i].ctl = (unsigned long)ctl_addr;
554         scc_ports[i].dma = (unsigned long)dma_addr;
555         pci_set_drvdata(dev, (void *) &scc_ports[i]);
556
557         return 1;
558
559  fail_3:
560         iounmap(ctl_addr);
561  fail_2:
562         release_mem_region(dma_base, dma_size);
563  fail_1:
564         release_mem_region(ctl_base, ctl_size);
565  fail_0:
566         return -ENOMEM;
567 }
568
569 /**
570  *      init_setup_scc  -       set up an SCC PATA Controller
571  *      @dev: PCI device
572  *      @d: IDE PCI device
573  *
574  *      Perform the initial set up for this device.
575  */
576
577 static int __devinit init_setup_scc(struct pci_dev *dev, ide_pci_device_t *d)
578 {
579         unsigned long ctl_base;
580         unsigned long dma_base;
581         unsigned long cckctrl_port;
582         unsigned long intmask_port;
583         unsigned long mode_port;
584         unsigned long ecmode_port;
585         unsigned long dma_status_port;
586         u32 reg = 0;
587         struct scc_ports *ports;
588         int rc;
589
590         rc = setup_mmio_scc(dev, d->name);
591         if (rc < 0) {
592                 return rc;
593         }
594
595         ports = pci_get_drvdata(dev);
596         ctl_base = ports->ctl;
597         dma_base = ports->dma;
598         cckctrl_port = ctl_base + 0xff0;
599         intmask_port = dma_base + 0x010;
600         mode_port = ctl_base + 0x024;
601         ecmode_port = ctl_base + 0xf00;
602         dma_status_port = dma_base + 0x004;
603
604         /* controller initialization */
605         reg = 0;
606         out_be32((void*)cckctrl_port, reg);
607         reg |= CCKCTRL_ATACLKOEN;
608         out_be32((void*)cckctrl_port, reg);
609         reg |= CCKCTRL_LCLKEN | CCKCTRL_OCLKEN;
610         out_be32((void*)cckctrl_port, reg);
611         reg |= CCKCTRL_CRST;
612         out_be32((void*)cckctrl_port, reg);
613
614         for (;;) {
615                 reg = in_be32((void*)cckctrl_port);
616                 if (reg & CCKCTRL_CRST)
617                         break;
618                 udelay(5000);
619         }
620
621         reg |= CCKCTRL_ATARESET;
622         out_be32((void*)cckctrl_port, reg);
623
624         out_be32((void*)ecmode_port, ECMODE_VALUE);
625         out_be32((void*)mode_port, MODE_JCUSFEN);
626         out_be32((void*)intmask_port, INTMASK_MSK);
627
628         return ide_setup_pci_device(dev, d);
629 }
630
631 /**
632  *      init_mmio_iops_scc      -       set up the iops for MMIO
633  *      @hwif: interface to set up
634  *
635  */
636
637 static void __devinit init_mmio_iops_scc(ide_hwif_t *hwif)
638 {
639         struct pci_dev *dev = hwif->pci_dev;
640         struct scc_ports *ports = pci_get_drvdata(dev);
641         unsigned long dma_base = ports->dma;
642
643         ide_set_hwifdata(hwif, ports);
644
645         hwif->INB = scc_ide_inb;
646         hwif->INW = scc_ide_inw;
647         hwif->INSW = scc_ide_insw;
648         hwif->INSL = scc_ide_insl;
649         hwif->OUTB = scc_ide_outb;
650         hwif->OUTBSYNC = scc_ide_outbsync;
651         hwif->OUTW = scc_ide_outw;
652         hwif->OUTSW = scc_ide_outsw;
653         hwif->OUTSL = scc_ide_outsl;
654
655         hwif->io_ports[IDE_DATA_OFFSET] = dma_base + 0x20;
656         hwif->io_ports[IDE_ERROR_OFFSET] = dma_base + 0x24;
657         hwif->io_ports[IDE_NSECTOR_OFFSET] = dma_base + 0x28;
658         hwif->io_ports[IDE_SECTOR_OFFSET] = dma_base + 0x2c;
659         hwif->io_ports[IDE_LCYL_OFFSET] = dma_base + 0x30;
660         hwif->io_ports[IDE_HCYL_OFFSET] = dma_base + 0x34;
661         hwif->io_ports[IDE_SELECT_OFFSET] = dma_base + 0x38;
662         hwif->io_ports[IDE_STATUS_OFFSET] = dma_base + 0x3c;
663         hwif->io_ports[IDE_CONTROL_OFFSET] = dma_base + 0x40;
664
665         hwif->irq = hwif->pci_dev->irq;
666         hwif->dma_base = dma_base;
667         hwif->config_data = ports->ctl;
668         hwif->mmio = 1;
669 }
670
671 /**
672  *      init_iops_scc   -       set up iops
673  *      @hwif: interface to set up
674  *
675  *      Do the basic setup for the SCC hardware interface
676  *      and then do the MMIO setup.
677  */
678
679 static void __devinit init_iops_scc(ide_hwif_t *hwif)
680 {
681         struct pci_dev *dev =  hwif->pci_dev;
682         hwif->hwif_data = NULL;
683         if (pci_get_drvdata(dev) == NULL)
684                 return;
685         init_mmio_iops_scc(hwif);
686 }
687
688 /**
689  *      init_hwif_scc   -       set up hwif
690  *      @hwif: interface to set up
691  *
692  *      We do the basic set up of the interface structure. The SCC
693  *      requires several custom handlers so we override the default
694  *      ide DMA handlers appropriately.
695  */
696
697 static void __devinit init_hwif_scc(ide_hwif_t *hwif)
698 {
699         struct scc_ports *ports = ide_get_hwifdata(hwif);
700
701         ports->hwif_id = hwif->index;
702
703         hwif->dma_command = hwif->dma_base;
704         hwif->dma_status = hwif->dma_base + 0x04;
705         hwif->dma_prdtable = hwif->dma_base + 0x08;
706
707         /* PTERADD */
708         out_be32((void __iomem *)(hwif->dma_base + 0x018), hwif->dmatable_dma);
709
710         hwif->dma_setup = scc_dma_setup;
711         hwif->ide_dma_end = scc_ide_dma_end;
712         hwif->speedproc = scc_tune_chipset;
713         hwif->tuneproc = scc_tuneproc;
714         hwif->ide_dma_check = scc_config_drive_for_dma;
715
716         hwif->drives[0].autotune = IDE_TUNE_AUTO;
717         hwif->drives[1].autotune = IDE_TUNE_AUTO;
718
719         if (in_be32((void __iomem *)(hwif->config_data + 0xff0)) & CCKCTRL_ATACLKOEN) {
720                 hwif->ultra_mask = 0x7f; /* 133MHz */
721         } else {
722                 hwif->ultra_mask = 0x3f; /* 100MHz */
723         }
724         hwif->mwdma_mask = 0x00;
725         hwif->swdma_mask = 0x00;
726         hwif->atapi_dma = 1;
727
728         /* we support 80c cable only. */
729         hwif->udma_four = 1;
730
731         hwif->autodma = 0;
732         if (!noautodma)
733                 hwif->autodma = 1;
734         hwif->drives[0].autodma = hwif->autodma;
735         hwif->drives[1].autodma = hwif->autodma;
736 }
737
738 #define DECLARE_SCC_DEV(name_str)                       \
739   {                                                     \
740       .name             = name_str,                     \
741       .init_setup       = init_setup_scc,               \
742       .init_iops        = init_iops_scc,                \
743       .init_hwif        = init_hwif_scc,                \
744       .channels = 1,                                    \
745       .autodma  = AUTODMA,                              \
746       .bootable = ON_BOARD,                             \
747   }
748
749 static ide_pci_device_t scc_chipsets[] __devinitdata = {
750         /* 0 */ DECLARE_SCC_DEV("sccIDE"),
751 };
752
753 /**
754  *      scc_init_one    -       pci layer discovery entry
755  *      @dev: PCI device
756  *      @id: ident table entry
757  *
758  *      Called by the PCI code when it finds an SCC PATA controller.
759  *      We then use the IDE PCI generic helper to do most of the work.
760  */
761
762 static int __devinit scc_init_one(struct pci_dev *dev, const struct pci_device_id *id)
763 {
764         ide_pci_device_t *d = &scc_chipsets[id->driver_data];
765         return d->init_setup(dev, d);
766 }
767
768 /**
769  *      scc_remove      -       pci layer remove entry
770  *      @dev: PCI device
771  *
772  *      Called by the PCI code when it removes an SCC PATA controller.
773  */
774
775 static void __devexit scc_remove(struct pci_dev *dev)
776 {
777         struct scc_ports *ports = pci_get_drvdata(dev);
778         ide_hwif_t *hwif = &ide_hwifs[ports->hwif_id];
779         unsigned long ctl_base = pci_resource_start(dev, 0);
780         unsigned long dma_base = pci_resource_start(dev, 1);
781         unsigned long ctl_size = pci_resource_len(dev, 0);
782         unsigned long dma_size = pci_resource_len(dev, 1);
783
784         if (hwif->dmatable_cpu) {
785                 pci_free_consistent(hwif->pci_dev,
786                                     PRD_ENTRIES * PRD_BYTES,
787                                     hwif->dmatable_cpu,
788                                     hwif->dmatable_dma);
789                 hwif->dmatable_cpu = NULL;
790         }
791
792         ide_unregister(hwif->index);
793
794         hwif->chipset = ide_unknown;
795         iounmap((void*)ports->dma);
796         iounmap((void*)ports->ctl);
797         release_mem_region(dma_base, dma_size);
798         release_mem_region(ctl_base, ctl_size);
799         memset(ports, 0, sizeof(*ports));
800 }
801
802 static struct pci_device_id scc_pci_tbl[] = {
803         { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SCC_ATA,  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
804         { 0, },
805 };
806 MODULE_DEVICE_TABLE(pci, scc_pci_tbl);
807
808 static struct pci_driver driver = {
809         .name = "SCC IDE",
810         .id_table = scc_pci_tbl,
811         .probe = scc_init_one,
812         .remove = scc_remove,
813 };
814
815 static int scc_ide_init(void)
816 {
817         return ide_pci_register_driver(&driver);
818 }
819
820 module_init(scc_ide_init);
821 /* -- No exit code?
822 static void scc_ide_exit(void)
823 {
824         ide_pci_unregister_driver(&driver);
825 }
826 module_exit(scc_ide_exit);
827  */
828
829
830 MODULE_DESCRIPTION("PCI driver module for Toshiba SCC IDE");
831 MODULE_LICENSE("GPL");