Free Electrons

Embedded Linux Experts

  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
/*
 * Toshiba RBTX4939 setup routines.
 * Based on linux/arch/mips/txx9/rbtx4938/setup.c,
 *	    and RBTX49xx patch from CELF patch archive.
 *
 * Copyright (C) 2000-2001,2005-2007 Toshiba Corporation
 * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
 * terms of the GNU General Public License version 2. This program is
 * licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/interrupt.h>
#include <linux/smc91x.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/map.h>
#include <asm/reboot.h>
#include <asm/txx9/generic.h>
#include <asm/txx9/pci.h>
#include <asm/txx9/rbtx4939.h>

static void rbtx4939_machine_restart(char *command)
{
	local_irq_disable();
	writeb(1, rbtx4939_reseten_addr);
	writeb(1, rbtx4939_softreset_addr);
	while (1)
		;
}

static void __init rbtx4939_time_init(void)
{
	tx4939_time_init(0);
}

#if defined(__BIG_ENDIAN) && IS_ENABLED(CONFIG_SMC91X)
#define HAVE_RBTX4939_IOSWAB
#define IS_CE1_ADDR(addr) \
	((((unsigned long)(addr) - IO_BASE) & 0xfff00000) == TXX9_CE(1))
static u16 rbtx4939_ioswabw(volatile u16 *a, u16 x)
{
	return IS_CE1_ADDR(a) ? x : le16_to_cpu(x);
}
static u16 rbtx4939_mem_ioswabw(volatile u16 *a, u16 x)
{
	return !IS_CE1_ADDR(a) ? x : le16_to_cpu(x);
}
#endif /* __BIG_ENDIAN && CONFIG_SMC91X */

static void __init rbtx4939_pci_setup(void)
{
#ifdef CONFIG_PCI
	int extarb = !(__raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_PCIARB);
	struct pci_controller *c = &txx9_primary_pcic;

	register_pci_controller(c);

	tx4939_report_pciclk();
	tx4927_pcic_setup(tx4939_pcicptr, c, extarb);
	if (!(__raw_readq(&tx4939_ccfgptr->pcfg) & TX4939_PCFG_ATA1MODE) &&
	    (__raw_readq(&tx4939_ccfgptr->pcfg) &
	     (TX4939_PCFG_ET0MODE | TX4939_PCFG_ET1MODE))) {
		tx4939_report_pci1clk();

		/* mem:64K(max), io:64K(max) (enough for ETH0,ETH1) */
		c = txx9_alloc_pci_controller(NULL, 0, 0x10000, 0, 0x10000);
		register_pci_controller(c);
		tx4927_pcic_setup(tx4939_pcic1ptr, c, 0);
	}

	tx4939_setup_pcierr_irq();
#endif /* CONFIG_PCI */
}

static unsigned long long default_ebccr[] __initdata = {
	0x01c0000000007608ULL, /* 64M ROM */
	0x017f000000007049ULL, /* 1M IOC */
	0x0180000000408608ULL, /* ISA */
	0,
};

static void __init rbtx4939_ebusc_setup(void)
{
	int i;
	unsigned int sp;

	/* use user-configured speed */
	sp = TX4939_EBUSC_CR(0) & 0x30;
	default_ebccr[0] |= sp;
	default_ebccr[1] |= sp;
	default_ebccr[2] |= sp;
	/* initialise by myself */
	for (i = 0; i < ARRAY_SIZE(default_ebccr); i++) {
		if (default_ebccr[i])
			____raw_writeq(default_ebccr[i],
				       &tx4939_ebuscptr->cr[i]);
		else
			____raw_writeq(____raw_readq(&tx4939_ebuscptr->cr[i])
				       & ~8,
				       &tx4939_ebuscptr->cr[i]);
	}
}

static void __init rbtx4939_update_ioc_pen(void)
{
	__u64 pcfg = ____raw_readq(&tx4939_ccfgptr->pcfg);
	__u64 ccfg = ____raw_readq(&tx4939_ccfgptr->ccfg);
	__u8 pe1 = readb(rbtx4939_pe1_addr);
	__u8 pe2 = readb(rbtx4939_pe2_addr);
	__u8 pe3 = readb(rbtx4939_pe3_addr);
	if (pcfg & TX4939_PCFG_ATA0MODE)
		pe1 |= RBTX4939_PE1_ATA(0);
	else
		pe1 &= ~RBTX4939_PE1_ATA(0);
	if (pcfg & TX4939_PCFG_ATA1MODE) {
		pe1 |= RBTX4939_PE1_ATA(1);
		pe1 &= ~(RBTX4939_PE1_RMII(0) | RBTX4939_PE1_RMII(1));
	} else {
		pe1 &= ~RBTX4939_PE1_ATA(1);
		if (pcfg & TX4939_PCFG_ET0MODE)
			pe1 |= RBTX4939_PE1_RMII(0);
		else
			pe1 &= ~RBTX4939_PE1_RMII(0);
		if (pcfg & TX4939_PCFG_ET1MODE)
			pe1 |= RBTX4939_PE1_RMII(1);
		else
			pe1 &= ~RBTX4939_PE1_RMII(1);
	}
	if (ccfg & TX4939_CCFG_PTSEL)
		pe3 &= ~(RBTX4939_PE3_VP | RBTX4939_PE3_VP_P |
			 RBTX4939_PE3_VP_S);
	else {
		__u64 vmode = pcfg &
			(TX4939_PCFG_VSSMODE | TX4939_PCFG_VPSMODE);
		if (vmode == 0)
			pe3 &= ~(RBTX4939_PE3_VP | RBTX4939_PE3_VP_P |
				 RBTX4939_PE3_VP_S);
		else if (vmode == TX4939_PCFG_VPSMODE) {
			pe3 |= RBTX4939_PE3_VP_P;
			pe3 &= ~(RBTX4939_PE3_VP | RBTX4939_PE3_VP_S);
		} else if (vmode == TX4939_PCFG_VSSMODE) {
			pe3 |= RBTX4939_PE3_VP | RBTX4939_PE3_VP_S;
			pe3 &= ~RBTX4939_PE3_VP_P;
		} else {
			pe3 |= RBTX4939_PE3_VP | RBTX4939_PE3_VP_P;
			pe3 &= ~RBTX4939_PE3_VP_S;
		}
	}
	if (pcfg & TX4939_PCFG_SPIMODE) {
		if (pcfg & TX4939_PCFG_SIO2MODE_GPIO)
			pe2 &= ~(RBTX4939_PE2_SIO2 | RBTX4939_PE2_SIO0);
		else {
			if (pcfg & TX4939_PCFG_SIO2MODE_SIO2) {
				pe2 |= RBTX4939_PE2_SIO2;
				pe2 &= ~RBTX4939_PE2_SIO0;
			} else {
				pe2 |= RBTX4939_PE2_SIO0;
				pe2 &= ~RBTX4939_PE2_SIO2;
			}
		}
		if (pcfg & TX4939_PCFG_SIO3MODE)
			pe2 |= RBTX4939_PE2_SIO3;
		else
			pe2 &= ~RBTX4939_PE2_SIO3;
		pe2 &= ~RBTX4939_PE2_SPI;
	} else {
		pe2 |= RBTX4939_PE2_SPI;
		pe2 &= ~(RBTX4939_PE2_SIO3 | RBTX4939_PE2_SIO2 |
			 RBTX4939_PE2_SIO0);
	}
	if ((pcfg & TX4939_PCFG_I2SMODE_MASK) == TX4939_PCFG_I2SMODE_GPIO)
		pe2 |= RBTX4939_PE2_GPIO;
	else
		pe2 &= ~RBTX4939_PE2_GPIO;
	writeb(pe1, rbtx4939_pe1_addr);
	writeb(pe2, rbtx4939_pe2_addr);
	writeb(pe3, rbtx4939_pe3_addr);
}

#define RBTX4939_MAX_7SEGLEDS	8

#if IS_ENABLED(CONFIG_LEDS_CLASS)
static u8 led_val[RBTX4939_MAX_7SEGLEDS];
struct rbtx4939_led_data {
	struct led_classdev cdev;
	char name[32];
	unsigned int num;
};

/* Use "dot" in 7seg LEDs */
static void rbtx4939_led_brightness_set(struct led_classdev *led_cdev,
					enum led_brightness value)
{
	struct rbtx4939_led_data *led_dat =
		container_of(led_cdev, struct rbtx4939_led_data, cdev);
	unsigned int num = led_dat->num;
	unsigned long flags;

	local_irq_save(flags);
	led_val[num] = (led_val[num] & 0x7f) | (value ? 0x80 : 0);
	writeb(led_val[num], rbtx4939_7seg_addr(num / 4, num % 4));
	local_irq_restore(flags);
}

static int __init rbtx4939_led_probe(struct platform_device *pdev)
{
	struct rbtx4939_led_data *leds_data;
	int i;
	static char *default_triggers[] __initdata = {
		"heartbeat",
		"disk-activity",
		"nand-disk",
	};

	leds_data = kzalloc(sizeof(*leds_data) * RBTX4939_MAX_7SEGLEDS,
			    GFP_KERNEL);
	if (!leds_data)
		return -ENOMEM;
	for (i = 0; i < RBTX4939_MAX_7SEGLEDS; i++) {
		int rc;
		struct rbtx4939_led_data *led_dat = &leds_data[i];

		led_dat->num = i;
		led_dat->cdev.brightness_set = rbtx4939_led_brightness_set;
		sprintf(led_dat->name, "rbtx4939:amber:%u", i);
		led_dat->cdev.name = led_dat->name;
		if (i < ARRAY_SIZE(default_triggers))
			led_dat->cdev.default_trigger = default_triggers[i];
		rc = led_classdev_register(&pdev->dev, &led_dat->cdev);
		if (rc < 0)
			return rc;
		led_dat->cdev.brightness_set(&led_dat->cdev, 0);
	}
	return 0;

}

static struct platform_driver rbtx4939_led_driver = {
	.driver	 = {
		.name = "rbtx4939-led",
	},
};

static void __init rbtx4939_led_setup(void)
{
	platform_device_register_simple("rbtx4939-led", -1, NULL, 0);
	platform_driver_probe(&rbtx4939_led_driver, rbtx4939_led_probe);
}
#else
static inline void rbtx4939_led_setup(void)
{
}
#endif

static void __rbtx4939_7segled_putc(unsigned int pos, unsigned char val)
{
#if IS_ENABLED(CONFIG_LEDS_CLASS)
	unsigned long flags;
	local_irq_save(flags);
	/* bit7: reserved for LED class */
	led_val[pos] = (led_val[pos] & 0x80) | (val & 0x7f);
	val = led_val[pos];
	local_irq_restore(flags);
#endif
	writeb(val, rbtx4939_7seg_addr(pos / 4, pos % 4));
}

static void rbtx4939_7segled_putc(unsigned int pos, unsigned char val)
{
	/* convert from map_to_seg7() notation */
	val = (val & 0x88) |
		((val & 0x40) >> 6) |
		((val & 0x20) >> 4) |
		((val & 0x10) >> 2) |
		((val & 0x04) << 2) |
		((val & 0x02) << 4) |
		((val & 0x01) << 6);
	__rbtx4939_7segled_putc(pos, val);
}

#if IS_ENABLED(CONFIG_MTD_RBTX4939)
/* special mapping for boot rom */
static unsigned long rbtx4939_flash_fixup_ofs(unsigned long ofs)
{
	u8 bdipsw = readb(rbtx4939_bdipsw_addr) & 0x0f;
	unsigned char shift;

	if (bdipsw & 8) {
		/* BOOT Mode: USER ROM1 / USER ROM2 */
		shift = bdipsw & 3;
		/* rotate A[23:22] */
		return (ofs & ~0xc00000) | ((((ofs >> 22) + shift) & 3) << 22);
	}
#ifdef __BIG_ENDIAN
	if (bdipsw == 0)
		/* BOOT Mode: Monitor ROM */
		ofs ^= 0x400000;	/* swap A[22] */
#endif
	return ofs;
}

static map_word rbtx4939_flash_read16(struct map_info *map, unsigned long ofs)
{
	map_word r;

	ofs = rbtx4939_flash_fixup_ofs(ofs);
	r.x[0] = __raw_readw(map->virt + ofs);
	return r;
}

static void rbtx4939_flash_write16(struct map_info *map, const map_word datum,
				   unsigned long ofs)
{
	ofs = rbtx4939_flash_fixup_ofs(ofs);
	__raw_writew(datum.x[0], map->virt + ofs);
	mb();	/* see inline_map_write() in mtd/map.h */
}

static void rbtx4939_flash_copy_from(struct map_info *map, void *to,
				     unsigned long from, ssize_t len)
{
	u8 bdipsw = readb(rbtx4939_bdipsw_addr) & 0x0f;
	unsigned char shift;
	ssize_t curlen;

	from += (unsigned long)map->virt;
	if (bdipsw & 8) {
		/* BOOT Mode: USER ROM1 / USER ROM2 */
		shift = bdipsw & 3;
		while (len) {
			curlen = min_t(unsigned long, len,
				     0x400000 - (from & (0x400000 - 1)));
			memcpy(to,
			       (void *)((from & ~0xc00000) |
					((((from >> 22) + shift) & 3) << 22)),
			       curlen);
			len -= curlen;
			from += curlen;
			to += curlen;
		}
		return;
	}
#ifdef __BIG_ENDIAN
	if (bdipsw == 0) {
		/* BOOT Mode: Monitor ROM */
		while (len) {
			curlen = min_t(unsigned long, len,
				     0x400000 - (from & (0x400000 - 1)));
			memcpy(to, (void *)(from ^ 0x400000), curlen);
			len -= curlen;
			from += curlen;
			to += curlen;
		}
		return;
	}
#endif
	memcpy(to, (void *)from, len);
}

static void rbtx4939_flash_map_init(struct map_info *map)
{
	map->read = rbtx4939_flash_read16;
	map->write = rbtx4939_flash_write16;
	map->copy_from = rbtx4939_flash_copy_from;
}

static void __init rbtx4939_mtd_init(void)
{
	static struct {
		struct platform_device dev;
		struct resource res;
		struct rbtx4939_flash_data data;
	} pdevs[4];
	int i;
	static char names[4][8];
	static struct mtd_partition parts[4];
	struct rbtx4939_flash_data *boot_pdata = &pdevs[0].data;
	u8 bdipsw = readb(rbtx4939_bdipsw_addr) & 0x0f;

	if (bdipsw & 8) {
		/* BOOT Mode: USER ROM1 / USER ROM2 */
		boot_pdata->nr_parts = 4;
		for (i = 0; i < boot_pdata->nr_parts; i++) {
			sprintf(names[i], "img%d", 4 - i);
			parts[i].name = names[i];
			parts[i].size = 0x400000;
			parts[i].offset = MTDPART_OFS_NXTBLK;
		}
	} else if (bdipsw == 0) {
		/* BOOT Mode: Monitor ROM */
		boot_pdata->nr_parts = 2;
		strcpy(names[0], "big");
		strcpy(names[1], "little");
		for (i = 0; i < boot_pdata->nr_parts; i++) {
			parts[i].name = names[i];
			parts[i].size = 0x400000;
			parts[i].offset = MTDPART_OFS_NXTBLK;
		}
	} else {
		/* BOOT Mode: ROM Emulator */
		boot_pdata->nr_parts = 2;
		parts[0].name = "boot";
		parts[0].offset = 0xc00000;
		parts[0].size = 0x400000;
		parts[1].name = "user";
		parts[1].offset = 0;
		parts[1].size = 0xc00000;
	}
	boot_pdata->parts = parts;
	boot_pdata->map_init = rbtx4939_flash_map_init;

	for (i = 0; i < ARRAY_SIZE(pdevs); i++) {
		struct resource *r = &pdevs[i].res;
		struct platform_device *dev = &pdevs[i].dev;

		r->start = 0x1f000000 - i * 0x1000000;
		r->end = r->start + 0x1000000 - 1;
		r->flags = IORESOURCE_MEM;
		pdevs[i].data.width = 2;
		dev->num_resources = 1;
		dev->resource = r;
		dev->id = i;
		dev->name = "rbtx4939-flash";
		dev->dev.platform_data = &pdevs[i].data;
		platform_device_register(dev);
	}
}
#else
static void __init rbtx4939_mtd_init(void)
{
}
#endif

static void __init rbtx4939_arch_init(void)
{
	rbtx4939_pci_setup();
}

static void __init rbtx4939_device_init(void)
{
	unsigned long smc_addr = RBTX4939_ETHER_ADDR - IO_BASE;
	struct resource smc_res[] = {
		{
			.start	= smc_addr,
			.end	= smc_addr + 0x10 - 1,
			.flags	= IORESOURCE_MEM,
		}, {
			.start	= RBTX4939_IRQ_ETHER,
			/* override default irq flag defined in smc91x.h */
			.flags	= IORESOURCE_IRQ | IRQF_TRIGGER_LOW,
		},
	};
	struct smc91x_platdata smc_pdata = {
		.flags = SMC91X_USE_16BIT,
	};
	struct platform_device *pdev;
#if IS_ENABLED(CONFIG_TC35815)
	int i, j;
	unsigned char ethaddr[2][6];
	u8 bdipsw = readb(rbtx4939_bdipsw_addr) & 0x0f;

	for (i = 0; i < 2; i++) {
		unsigned long area = CKSEG1 + 0x1fff0000 + (i * 0x10);
		if (bdipsw == 0)
			memcpy(ethaddr[i], (void *)area, 6);
		else {
			u16 buf[3];
			if (bdipsw & 8)
				area -= 0x03000000;
			else
				area -= 0x01000000;
			for (j = 0; j < 3; j++)
				buf[j] = le16_to_cpup((u16 *)(area + j * 2));
			memcpy(ethaddr[i], buf, 6);
		}
	}
	tx4939_ethaddr_init(ethaddr[0], ethaddr[1]);
#endif
	pdev = platform_device_alloc("smc91x", -1);
	if (!pdev ||
	    platform_device_add_resources(pdev, smc_res, ARRAY_SIZE(smc_res)) ||
	    platform_device_add_data(pdev, &smc_pdata, sizeof(smc_pdata)) ||
	    platform_device_add(pdev))
		platform_device_put(pdev);
	rbtx4939_mtd_init();
	/* TC58DVM82A1FT: tDH=10ns, tWP=tRP=tREADID=35ns */
	tx4939_ndfmc_init(10, 35,
			  (1 << 1) | (1 << 2),
			  (1 << 2)); /* ch1:8bit, ch2:16bit */
	rbtx4939_led_setup();
	tx4939_wdt_init();
	tx4939_ata_init();
	tx4939_rtc_init();
	tx4939_dmac_init(0, 2);
	tx4939_aclc_init();
	platform_device_register_simple("txx9aclc-generic", -1, NULL, 0);
	tx4939_sramc_init();
	tx4939_rng_init();
}

static void __init rbtx4939_setup(void)
{
	int i;

	rbtx4939_ebusc_setup();
	/* always enable ATA0 */
	txx9_set64(&tx4939_ccfgptr->pcfg, TX4939_PCFG_ATA0MODE);
	if (txx9_master_clock == 0)
		txx9_master_clock = 20000000;
	tx4939_setup();
	rbtx4939_update_ioc_pen();
#ifdef HAVE_RBTX4939_IOSWAB
	ioswabw = rbtx4939_ioswabw;
	__mem_ioswabw = rbtx4939_mem_ioswabw;
#endif

	_machine_restart = rbtx4939_machine_restart;

	txx9_7segled_init(RBTX4939_MAX_7SEGLEDS, rbtx4939_7segled_putc);
	for (i = 0; i < RBTX4939_MAX_7SEGLEDS; i++)
		txx9_7segled_putc(i, '-');
	pr_info("RBTX4939 (Rev %02x) --- FPGA(Rev %02x) DIPSW:%02x,%02x\n",
		readb(rbtx4939_board_rev_addr), readb(rbtx4939_ioc_rev_addr),
		readb(rbtx4939_udipsw_addr), readb(rbtx4939_bdipsw_addr));

#ifdef CONFIG_PCI
	txx9_alloc_pci_controller(&txx9_primary_pcic, 0, 0, 0, 0);
	txx9_board_pcibios_setup = tx4927_pcibios_setup;
#else
	set_io_port_base(RBTX4939_ETHER_BASE);
#endif

	tx4939_sio_init(TX4939_SCLK0(txx9_master_clock), 0);
}

struct txx9_board_vec rbtx4939_vec __initdata = {
	.system = "Toshiba RBTX4939",
	.prom_init = rbtx4939_prom_init,
	.mem_setup = rbtx4939_setup,
	.irq_setup = rbtx4939_irq_setup,
	.time_init = rbtx4939_time_init,
	.device_init = rbtx4939_device_init,
	.arch_init = rbtx4939_arch_init,
#ifdef CONFIG_PCI
	.pci_map_irq = tx4939_pci_map_irq,
#endif
};