summaryrefslogtreecommitdiff
path: root/drivers/ide/ppc/mpc8xx.c
blob: 82de2d781f2ea24da3b1c8e0c49d907d03b1d4bb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
/*
 *  linux/drivers/ide/ppc/ide-m8xx.c
 *
 *  Copyright (C) 2000, 2001 Wolfgang Denk, wd@denx.de
 *  Modified for direct IDE interface
 *	by Thomas Lange, thomas@corelatus.com
 *  Modified for direct IDE interface on 8xx without using the PCMCIA
 *  controller
 *	by Steven.Scholz@imc-berlin.de
 *  Moved out of arch/ppc/kernel/m8xx_setup.c, other minor cleanups
 *	by Mathew Locke <mattl@mvista.com>
 */

#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/major.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/ide.h>
#include <linux/bootmem.h>

#include <asm/mpc8xx.h>
#include <asm/mmu.h>
#include <asm/processor.h>
#include <asm/residual.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/ide.h>
#include <asm/8xx_immap.h>
#include <asm/machdep.h>
#include <asm/irq.h>

static int identify  (volatile u8 *p);
static void print_fixed (volatile u8 *p);
static void print_funcid (int func);
static int check_ide_device (unsigned long base);

static void ide_interrupt_ack (void *dev);
static void m8xx_ide_tuneproc(ide_drive_t *drive, u8 pio);

typedef	struct ide_ioport_desc {
	unsigned long	base_off;		/* Offset to PCMCIA memory	*/
	unsigned long	reg_off[IDE_NR_PORTS];	/* controller register offsets	*/
	int		irq;			/* IRQ				*/
} ide_ioport_desc_t;

ide_ioport_desc_t ioport_dsc[MAX_HWIFS] = {
#ifdef IDE0_BASE_OFFSET
	{ IDE0_BASE_OFFSET,
	    {
		IDE0_DATA_REG_OFFSET,
		IDE0_ERROR_REG_OFFSET,
		IDE0_NSECTOR_REG_OFFSET,
		IDE0_SECTOR_REG_OFFSET,
		IDE0_LCYL_REG_OFFSET,
		IDE0_HCYL_REG_OFFSET,
		IDE0_SELECT_REG_OFFSET,
		IDE0_STATUS_REG_OFFSET,
		IDE0_CONTROL_REG_OFFSET,
		IDE0_IRQ_REG_OFFSET,
	    },
	    IDE0_INTERRUPT,
	},
#ifdef IDE1_BASE_OFFSET
	{ IDE1_BASE_OFFSET,
	    {
		IDE1_DATA_REG_OFFSET,
		IDE1_ERROR_REG_OFFSET,
		IDE1_NSECTOR_REG_OFFSET,
		IDE1_SECTOR_REG_OFFSET,
		IDE1_LCYL_REG_OFFSET,
		IDE1_HCYL_REG_OFFSET,
		IDE1_SELECT_REG_OFFSET,
		IDE1_STATUS_REG_OFFSET,
		IDE1_CONTROL_REG_OFFSET,
		IDE1_IRQ_REG_OFFSET,
	    },
	    IDE1_INTERRUPT,
	},
#endif /* IDE1_BASE_OFFSET */
#endif	/* IDE0_BASE_OFFSET */
};

ide_pio_timings_t ide_pio_clocks[6];
int hold_time[6] =  {30, 20, 15, 10, 10, 10 };   /* PIO Mode 5 with IORDY (nonstandard) */

/*
 * Warning: only 1 (ONE) PCMCIA slot supported here,
 * which must be correctly initialized by the firmware (PPCBoot).
 */
static int _slot_ = -1;			/* will be read from PCMCIA registers   */

/* Make clock cycles and always round up */
#define PCMCIA_MK_CLKS( t, T ) (( (t) * ((T)/1000000) + 999U ) / 1000U )



/*
 * IDE stuff.
 */
static int
m8xx_ide_default_irq(unsigned long base)
{
#ifdef CONFIG_BLK_DEV_MPC8xx_IDE
	if (base >= MAX_HWIFS)
		return 0;

	printk("[%d] m8xx_ide_default_irq %d\n",__LINE__,ioport_dsc[base].irq);
	
	return (ioport_dsc[base].irq);
#else
        return 9;
#endif
}

static unsigned long
m8xx_ide_default_io_base(int index)
{
        return index;
}

#define M8XX_PCMCIA_CD2(slot)      (0x10000000 >> (slot << 4))
#define M8XX_PCMCIA_CD1(slot)      (0x08000000 >> (slot << 4))

/*
 * The TQM850L hardware has two pins swapped! Grrrrgh!
 */
#ifdef	CONFIG_TQM850L
#define __MY_PCMCIA_GCRX_CXRESET	PCMCIA_GCRX_CXOE
#define __MY_PCMCIA_GCRX_CXOE		PCMCIA_GCRX_CXRESET
#else
#define __MY_PCMCIA_GCRX_CXRESET	PCMCIA_GCRX_CXRESET
#define __MY_PCMCIA_GCRX_CXOE		PCMCIA_GCRX_CXOE
#endif

#if defined(CONFIG_BLK_DEV_MPC8xx_IDE) && defined(CONFIG_IDE_8xx_PCCARD)
#define PCMCIA_SCHLVL IDE0_INTERRUPT	/* Status Change Interrupt Level	*/
static int pcmcia_schlvl = PCMCIA_SCHLVL;
#endif

/*
 * See include/linux/ide.h for definition of hw_regs_t (p, base)
 */

/*
 * m8xx_ide_init_hwif_ports for a direct IDE interface _using_
 */
#if defined(CONFIG_IDE_8xx_PCCARD) || defined(CONFIG_IDE_8xx_DIRECT)
static void
m8xx_ide_init_hwif_ports(hw_regs_t *hw, unsigned long data_port, 
		unsigned long ctrl_port, int *irq)
{
	unsigned long *p = hw->io_ports;
	int i;

	typedef struct {
		ulong br;
		ulong or;
	} pcmcia_win_t;
	volatile pcmcia_win_t *win;
	volatile pcmconf8xx_t *pcmp;

	uint *pgcrx;
	u32 pcmcia_phy_base;
	u32 pcmcia_phy_end;
	static unsigned long pcmcia_base = 0;
	unsigned long base;

	*p = 0;
	if (irq)
		*irq = 0;

	pcmp = (pcmconf8xx_t *)(&(((immap_t *)IMAP_ADDR)->im_pcmcia));

	if (!pcmcia_base) {
                /*
                 * Read out PCMCIA registers. Since the reset values
                 * are undefined, we sure hope that they have been
                 * set up by firmware
		 */

		/* Scan all registers for valid settings */
		pcmcia_phy_base = 0xFFFFFFFF;
		pcmcia_phy_end = 0;
		/* br0 is start of brX and orX regs */
		win = (pcmcia_win_t *) \
			(&(((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pbr0));
		for (i = 0; i < 8; i++) {
			if (win->or & 1) {	/* This bank is marked as valid */
				if (win->br < pcmcia_phy_base) {
					pcmcia_phy_base = win->br;
				}
				if ((win->br + PCMCIA_MEM_SIZE) > pcmcia_phy_end) {
					pcmcia_phy_end  = win->br + PCMCIA_MEM_SIZE;
				}
				/* Check which slot that has been defined */
				_slot_ = (win->or >> 2) & 1;

			}					/* Valid bank */
			win++;
		}						/* for */

		printk ("PCMCIA slot %c: phys mem %08x...%08x (size %08x)\n",
			'A' + _slot_,
			pcmcia_phy_base, pcmcia_phy_end,
			pcmcia_phy_end - pcmcia_phy_base);

		pcmcia_base=(unsigned long)ioremap(pcmcia_phy_base,
						   pcmcia_phy_end-pcmcia_phy_base);

#ifdef DEBUG
		printk ("PCMCIA virt base: %08lx\n", pcmcia_base);
#endif
		/* Compute clock cycles for PIO timings */
		for (i=0; i<6; ++i) {
			bd_t	*binfo = (bd_t *)__res;

			hold_time[i]   =
				PCMCIA_MK_CLKS (hold_time[i],
						binfo->bi_busfreq);
			ide_pio_clocks[i].setup_time  =
				PCMCIA_MK_CLKS (ide_pio_timings[i].setup_time,
						binfo->bi_busfreq);
			ide_pio_clocks[i].active_time =
				PCMCIA_MK_CLKS (ide_pio_timings[i].active_time,
						binfo->bi_busfreq);
			ide_pio_clocks[i].cycle_time  =
				PCMCIA_MK_CLKS (ide_pio_timings[i].cycle_time,
						binfo->bi_busfreq);
#if 0
			printk ("PIO mode %d timings: %d/%d/%d => %d/%d/%d\n",
				i,
				ide_pio_clocks[i].setup_time,
				ide_pio_clocks[i].active_time,
				ide_pio_clocks[i].hold_time,
				ide_pio_clocks[i].cycle_time,
				ide_pio_timings[i].setup_time,
				ide_pio_timings[i].active_time,
				ide_pio_timings[i].hold_time,
				ide_pio_timings[i].cycle_time);
#endif
		}
	}

	if (data_port >= MAX_HWIFS)
		return;

	if (_slot_ == -1) {
		printk ("PCMCIA slot has not been defined! Using A as default\n");
		_slot_ = 0;
	}

#ifdef CONFIG_IDE_8xx_PCCARD

#ifdef DEBUG
	printk ("PIPR = 0x%08X  slot %c ==> mask = 0x%X\n",
		pcmp->pcmc_pipr,
		'A' + _slot_,
		M8XX_PCMCIA_CD1(_slot_) | M8XX_PCMCIA_CD2(_slot_) );
#endif /* DEBUG */

	if (pcmp->pcmc_pipr & (M8XX_PCMCIA_CD1(_slot_)|M8XX_PCMCIA_CD2(_slot_))) {
		printk ("No card in slot %c: PIPR=%08x\n",
			'A' + _slot_, (u32) pcmp->pcmc_pipr);
		return;		/* No card in slot */
	}

	check_ide_device (pcmcia_base);

#endif	/* CONFIG_IDE_8xx_PCCARD */

	base = pcmcia_base + ioport_dsc[data_port].base_off;
#ifdef DEBUG
	printk ("base: %08x + %08x = %08x\n",
			pcmcia_base, ioport_dsc[data_port].base_off, base);
#endif

	for (i = 0; i < IDE_NR_PORTS; ++i) {
#ifdef DEBUG
		printk ("port[%d]: %08x + %08x = %08x\n",
			i,
			base,
			ioport_dsc[data_port].reg_off[i],
			i, base + ioport_dsc[data_port].reg_off[i]);
#endif
	 	*p++ = base + ioport_dsc[data_port].reg_off[i];
	}

	if (irq) {
#ifdef CONFIG_IDE_8xx_PCCARD
		unsigned int reg;

		*irq = ioport_dsc[data_port].irq;
		if (_slot_)
			pgcrx = &((immap_t *) IMAP_ADDR)->im_pcmcia.pcmc_pgcrb;
		else
			pgcrx = &((immap_t *) IMAP_ADDR)->im_pcmcia.pcmc_pgcra;

		reg = *pgcrx;
		reg |= mk_int_int_mask (pcmcia_schlvl) << 24;
		reg |= mk_int_int_mask (pcmcia_schlvl) << 16;
		*pgcrx = reg;
#else	/* direct connected IDE drive, i.e. external IRQ, not the PCMCIA irq */
		*irq = ioport_dsc[data_port].irq;
#endif	/* CONFIG_IDE_8xx_PCCARD */
	}

	/* register routine to tune PIO mode */
	ide_hwifs[data_port].tuneproc = m8xx_ide_tuneproc;

	hw->ack_intr = (ide_ack_intr_t *) ide_interrupt_ack;
	/* Enable Harddisk Interrupt,
	 * and make it edge sensitive
	 */
	/* (11-18) Set edge detect for irq, no wakeup from low power mode */
	((immap_t *)IMAP_ADDR)->im_siu_conf.sc_siel |=
					(0x80000000 >> ioport_dsc[data_port].irq);

#ifdef CONFIG_IDE_8xx_PCCARD
	/* Make sure we don't get garbage irq */
	((immap_t *) IMAP_ADDR)->im_pcmcia.pcmc_pscr = 0xFFFF;

	/* Enable falling edge irq */
	pcmp->pcmc_per = 0x100000 >> (16 * _slot_);
#endif	/* CONFIG_IDE_8xx_PCCARD */
}	/* m8xx_ide_init_hwif_ports() using 8xx internal PCMCIA interface */
#endif /* CONFIG_IDE_8xx_PCCARD || CONFIG_IDE_8xx_DIRECT */

/*
 * m8xx_ide_init_hwif_ports for a direct IDE interface _not_ using
 * MPC8xx's internal PCMCIA interface
 */
#if defined(CONFIG_IDE_EXT_DIRECT)
void m8xx_ide_init_hwif_ports (hw_regs_t *hw,
	unsigned long data_port, unsigned long ctrl_port, int *irq)
{
	unsigned long *p = hw->io_ports;
	int i;

	u32 ide_phy_base;
	u32 ide_phy_end;
	static unsigned long ide_base = 0;
	unsigned long base;

	*p = 0;
	if (irq)
		*irq = 0;

	if (!ide_base) {

		/* TODO:
		 * - add code to read ORx, BRx
		 */
		ide_phy_base = CFG_ATA_BASE_ADDR;
		ide_phy_end  = CFG_ATA_BASE_ADDR + 0x200;

		printk ("IDE phys mem : %08x...%08x (size %08x)\n",
			ide_phy_base, ide_phy_end,
			ide_phy_end - ide_phy_base);
		
		ide_base=(unsigned long)ioremap(ide_phy_base,
						ide_phy_end-ide_phy_base);

#ifdef DEBUG
		printk ("IDE virt base: %08lx\n", ide_base);
#endif
	}

	if (data_port >= MAX_HWIFS)
		return;

	base = ide_base + ioport_dsc[data_port].base_off;
#ifdef DEBUG
	printk ("base: %08x + %08x = %08x\n",
		ide_base, ioport_dsc[data_port].base_off, base);
#endif

	for (i = 0; i < IDE_NR_PORTS; ++i) {
#ifdef DEBUG
		printk ("port[%d]: %08x + %08x = %08x\n",
			i,
			base,
			ioport_dsc[data_port].reg_off[i],
			i, base + ioport_dsc[data_port].reg_off[i]);
#endif
	 	*p++ = base + ioport_dsc[data_port].reg_off[i];
	}

	if (irq) {
		/* direct connected IDE drive, i.e. external IRQ */
		*irq = ioport_dsc[data_port].irq;
	}

	/* register routine to tune PIO mode */
	ide_hwifs[data_port].tuneproc = m8xx_ide_tuneproc;

	hw->ack_intr = (ide_ack_intr_t *) ide_interrupt_ack;
	/* Enable Harddisk Interrupt,
	 * and make it edge sensitive
	 */
	/* (11-18) Set edge detect for irq, no wakeup from low power mode */
	((immap_t *) IMAP_ADDR)->im_siu_conf.sc_siel |=
			(0x80000000 >> ioport_dsc[data_port].irq);
}	/* m8xx_ide_init_hwif_ports() for CONFIG_IDE_8xx_DIRECT */ 

#endif	/* CONFIG_IDE_8xx_DIRECT */


/* -------------------------------------------------------------------- */


/* PCMCIA Timing */
#ifndef	PCMCIA_SHT
#define PCMCIA_SHT(t)	((t & 0x0F)<<16)	/* Strobe Hold  Time 	*/
#define PCMCIA_SST(t)	((t & 0x0F)<<12)	/* Strobe Setup Time	*/
#define PCMCIA_SL(t) ((t==32) ? 0 : ((t & 0x1F)<<7)) /* Strobe Length	*/
#endif


/* Calculate PIO timings */
static void
m8xx_ide_tuneproc(ide_drive_t *drive, u8 pio)
{
	ide_pio_data_t d;
#if defined(CONFIG_IDE_8xx_PCCARD) || defined(CONFIG_IDE_8xx_DIRECT)
	volatile pcmconf8xx_t	*pcmp;
	ulong timing, mask, reg;
#endif

	pio = ide_get_best_pio_mode(drive, pio, 4, &d);

#if 1
	printk("%s[%d] %s: best PIO mode: %d\n",
		__FILE__,__LINE__,__FUNCTION__, pio);
#endif

#if defined(CONFIG_IDE_8xx_PCCARD) || defined(CONFIG_IDE_8xx_DIRECT)
	pcmp = (pcmconf8xx_t *)(&(((immap_t *)IMAP_ADDR)->im_pcmcia));

	mask = ~(PCMCIA_SHT(0xFF) | PCMCIA_SST(0xFF) | PCMCIA_SL(0xFF));

	timing  = PCMCIA_SHT(hold_time[pio]  )
		| PCMCIA_SST(ide_pio_clocks[pio].setup_time )
		| PCMCIA_SL (ide_pio_clocks[pio].active_time)
		;

#if 1
	printk ("Setting timing bits 0x%08lx in PCMCIA controller\n", timing);
#endif
	if ((reg = pcmp->pcmc_por0 & mask) != 0)
		pcmp->pcmc_por0 = reg | timing;

	if ((reg = pcmp->pcmc_por1 & mask) != 0)
		pcmp->pcmc_por1 = reg | timing;

	if ((reg = pcmp->pcmc_por2 & mask) != 0)
		pcmp->pcmc_por2 = reg | timing;

	if ((reg = pcmp->pcmc_por3 & mask) != 0)
		pcmp->pcmc_por3 = reg | timing;

	if ((reg = pcmp->pcmc_por4 & mask) != 0)
		pcmp->pcmc_por4 = reg | timing;

	if ((reg = pcmp->pcmc_por5 & mask) != 0)
		pcmp->pcmc_por5 = reg | timing;

	if ((reg = pcmp->pcmc_por6 & mask) != 0)
		pcmp->pcmc_por6 = reg | timing;

	if ((reg = pcmp->pcmc_por7 & mask) != 0)
		pcmp->pcmc_por7 = reg | timing;

#elif defined(CONFIG_IDE_EXT_DIRECT)

	printk("%s[%d] %s: not implemented yet!\n",
		__FILE__,__LINE__,__FUNCTION__);
#endif /* defined(CONFIG_IDE_8xx_PCCARD) || defined(CONFIG_IDE_8xx_PCMCIA */
}

static void
ide_interrupt_ack (void *dev)
{
#ifdef CONFIG_IDE_8xx_PCCARD
	u_int pscr, pipr;

#if (PCMCIA_SOCKETS_NO == 2)
	u_int _slot_;
#endif

	/* get interrupt sources */

	pscr = ((volatile immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr;
	pipr = ((volatile immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pipr;

	/*
	 * report only if both card detect signals are the same
	 * not too nice done,
	 * we depend on that CD2 is the bit to the left of CD1...
	 */

	if(_slot_==-1){
	  printk("PCMCIA slot has not been defined! Using A as default\n");
	  _slot_=0;
	}

	if(((pipr & M8XX_PCMCIA_CD2(_slot_)) >> 1) ^
	   (pipr & M8XX_PCMCIA_CD1(_slot_))         ) {
	  printk ("card detect interrupt\n");
	}
	/* clear the interrupt sources */
	((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr = pscr;

#else /* ! CONFIG_IDE_8xx_PCCARD */
	/*
	 * Only CONFIG_IDE_8xx_PCCARD is using the interrupt of the
	 * MPC8xx's PCMCIA controller, so there is nothing to be done here
	 * for CONFIG_IDE_8xx_DIRECT and CONFIG_IDE_EXT_DIRECT.
	 * The interrupt is handled somewhere else.	-- Steven
	 */
#endif /* CONFIG_IDE_8xx_PCCARD */
}



/*
 * CIS Tupel codes
 */
#define CISTPL_NULL		0x00
#define CISTPL_DEVICE		0x01
#define CISTPL_LONGLINK_CB	0x02
#define CISTPL_INDIRECT		0x03
#define CISTPL_CONFIG_CB	0x04
#define CISTPL_CFTABLE_ENTRY_CB 0x05
#define CISTPL_LONGLINK_MFC	0x06
#define CISTPL_BAR		0x07
#define CISTPL_PWR_MGMNT	0x08
#define CISTPL_EXTDEVICE	0x09
#define CISTPL_CHECKSUM		0x10
#define CISTPL_LONGLINK_A	0x11
#define CISTPL_LONGLINK_C	0x12
#define CISTPL_LINKTARGET	0x13
#define CISTPL_NO_LINK		0x14
#define CISTPL_VERS_1		0x15
#define CISTPL_ALTSTR		0x16
#define CISTPL_DEVICE_A		0x17
#define CISTPL_JEDEC_C		0x18
#define CISTPL_JEDEC_A		0x19
#define CISTPL_CONFIG		0x1a
#define CISTPL_CFTABLE_ENTRY	0x1b
#define CISTPL_DEVICE_OC	0x1c
#define CISTPL_DEVICE_OA	0x1d
#define CISTPL_DEVICE_GEO	0x1e
#define CISTPL_DEVICE_GEO_A	0x1f
#define CISTPL_MANFID		0x20
#define CISTPL_FUNCID		0x21
#define CISTPL_FUNCE		0x22
#define CISTPL_SWIL		0x23
#define CISTPL_END		0xff

/*
 * CIS Function ID codes
 */
#define CISTPL_FUNCID_MULTI	0x00
#define CISTPL_FUNCID_MEMORY	0x01
#define CISTPL_FUNCID_SERIAL	0x02
#define CISTPL_FUNCID_PARALLEL	0x03
#define CISTPL_FUNCID_FIXED	0x04
#define CISTPL_FUNCID_VIDEO	0x05
#define CISTPL_FUNCID_NETWORK	0x06
#define CISTPL_FUNCID_AIMS	0x07
#define CISTPL_FUNCID_SCSI	0x08

/*
 * Fixed Disk FUNCE codes
 */
#define CISTPL_IDE_INTERFACE	0x01

#define CISTPL_FUNCE_IDE_IFACE	0x01
#define CISTPL_FUNCE_IDE_MASTER	0x02
#define CISTPL_FUNCE_IDE_SLAVE	0x03

/* First feature byte */
#define CISTPL_IDE_SILICON	0x04
#define CISTPL_IDE_UNIQUE	0x08
#define CISTPL_IDE_DUAL		0x10

/* Second feature byte */
#define CISTPL_IDE_HAS_SLEEP	0x01
#define CISTPL_IDE_HAS_STANDBY	0x02
#define CISTPL_IDE_HAS_IDLE	0x04
#define CISTPL_IDE_LOW_POWER	0x08
#define CISTPL_IDE_REG_INHIBIT	0x10
#define CISTPL_IDE_HAS_INDEX	0x20
#define CISTPL_IDE_IOIS16	0x40


/* -------------------------------------------------------------------- */


#define	MAX_TUPEL_SZ	512
#define MAX_FEATURES	4

static int check_ide_device (unsigned long base)
{
	volatile u8 *ident = NULL;
	volatile u8 *feature_p[MAX_FEATURES];
	volatile u8 *p, *start;
	int n_features = 0;
	u8 func_id = ~0;
	u8 code, len;
	unsigned short config_base = 0;
	int found = 0;
	int i;

#ifdef DEBUG
	printk ("PCMCIA MEM: %08lX\n", base);
#endif
	start = p = (volatile u8 *) base;

	while ((p - start) < MAX_TUPEL_SZ) {

		code = *p; p += 2;

		if (code == 0xFF) { /* End of chain */
			break;
		}

		len = *p; p += 2;
#ifdef	DEBUG_PCMCIA
		{ volatile u8 *q = p;
			printk ("\nTuple code %02x  length %d\n\tData:",
				code, len);

			for (i = 0; i < len; ++i) {
				printk (" %02x", *q);
				q+= 2;
			}
		}
#endif	/* DEBUG_PCMCIA */
		switch (code) {
		case CISTPL_VERS_1:
			ident = p + 4;
			break;
		case CISTPL_FUNCID:
			func_id = *p;
			break;
		case CISTPL_FUNCE:
			if (n_features < MAX_FEATURES)
				feature_p[n_features++] = p;
			break;
		case CISTPL_CONFIG:
			config_base = (*(p+6) << 8) + (*(p+4));
		default:
			break;
		}
		p += 2 * len;
	}

	found = identify (ident);

	if (func_id != ((u8)~0)) {
		print_funcid (func_id);

		if (func_id == CISTPL_FUNCID_FIXED)
			found = 1;
		else
			return (1);	/* no disk drive */
	}

	for (i=0; i<n_features; ++i) {
		print_fixed (feature_p[i]);
	}

	if (!found) {
		printk ("unknown card type\n");
		return (1);
	}

	/* set level mode irq and I/O mapped device in config reg*/
	*((u8 *)(base + config_base)) = 0x41;

	return (0);
}

/* ------------------------------------------------------------------------- */

static void print_funcid (int func)
{
	switch (func) {
	case CISTPL_FUNCID_MULTI:
		printk (" Multi-Function");
		break;
	case CISTPL_FUNCID_MEMORY:
		printk (" Memory");
		break;
	case CISTPL_FUNCID_SERIAL:
		printk (" Serial Port");
		break;
	case CISTPL_FUNCID_PARALLEL:
		printk (" Parallel Port");
		break;
	case CISTPL_FUNCID_FIXED:
		printk (" Fixed Disk");
		break;
	case CISTPL_FUNCID_VIDEO:
		printk (" Video Adapter");
		break;
	case CISTPL_FUNCID_NETWORK:
		printk (" Network Adapter");
		break;
	case CISTPL_FUNCID_AIMS:
		printk (" AIMS Card");
		break;
	case CISTPL_FUNCID_SCSI:
		printk (" SCSI Adapter");
		break;
	default:
		printk (" Unknown");
		break;
	}
	printk (" Card\n");
}

/* ------------------------------------------------------------------------- */

static void print_fixed (volatile u8 *p)
{
	if (p == NULL)
		return;

	switch (*p) {
	case CISTPL_FUNCE_IDE_IFACE:
	    {   u8 iface = *(p+2);

		printk ((iface == CISTPL_IDE_INTERFACE) ? " IDE" : " unknown");
		printk (" interface ");
		break;
	    }
	case CISTPL_FUNCE_IDE_MASTER:
	case CISTPL_FUNCE_IDE_SLAVE:
	    {   u8 f1 = *(p+2);
		u8 f2 = *(p+4);

		printk ((f1 & CISTPL_IDE_SILICON) ? " [silicon]" : " [rotating]");

		if (f1 & CISTPL_IDE_UNIQUE)
			printk (" [unique]");

		printk ((f1 & CISTPL_IDE_DUAL) ? " [dual]" : " [single]");

		if (f2 & CISTPL_IDE_HAS_SLEEP)
			printk (" [sleep]");

		if (f2 & CISTPL_IDE_HAS_STANDBY)
			printk (" [standby]");

		if (f2 & CISTPL_IDE_HAS_IDLE)
			printk (" [idle]");

		if (f2 & CISTPL_IDE_LOW_POWER)
			printk (" [low power]");

		if (f2 & CISTPL_IDE_REG_INHIBIT)
			printk (" [reg inhibit]");

		if (f2 & CISTPL_IDE_HAS_INDEX)
			printk (" [index]");

		if (f2 & CISTPL_IDE_IOIS16)
			printk (" [IOis16]");

		break;
	    }
	}
	printk ("\n");
}

/* ------------------------------------------------------------------------- */


#define MAX_IDENT_CHARS		64
#define	MAX_IDENT_FIELDS	4

static u8 *known_cards[] = {
	"ARGOSY PnPIDE D5",
	NULL
};

static int identify  (volatile u8 *p)
{
	u8 id_str[MAX_IDENT_CHARS];
	u8 data;
	u8 *t;
	u8 **card;
	int i, done;

	if (p == NULL)
		return (0);	/* Don't know */

	t = id_str;
	done =0;

	for (i=0; i<=4 && !done; ++i, p+=2) {
		while ((data = *p) != '\0') {
			if (data == 0xFF) {
				done = 1;
				break;
			}
			*t++ = data;
			if (t == &id_str[MAX_IDENT_CHARS-1]) {
				done = 1;
				break;
			}
			p += 2;
		}
		if (!done)
			*t++ = ' ';
	}
	*t = '\0';
	while (--t > id_str) {
		if (*t == ' ')
			*t = '\0';
		else
			break;
	}
	printk ("Card ID: %s\n", id_str);

	for (card=known_cards; *card; ++card) {
		if (strcmp(*card, id_str) == 0) {	/* found! */
			return (1);
		}
	}

	return (0);	/* don't know */
}

void m8xx_ide_init(void)
{
	ppc_ide_md.default_irq          = m8xx_ide_default_irq;
	ppc_ide_md.default_io_base      = m8xx_ide_default_io_base;
	ppc_ide_md.ide_init_hwif        = m8xx_ide_init_hwif_ports;
}