xref: /openbmc/linux/arch/mips/ar7/platform.c (revision c796f021) 
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (C) 2006,2007 Felix Fietkau <nbd@openwrt.org>
4  * Copyright (C) 2006,2007 Eugene Konev <ejka@openwrt.org>
5  */
6 
7 #include <linux/init.h>
8 #include <linux/types.h>
9 #include <linux/delay.h>
10 #include <linux/dma-mapping.h>
11 #include <linux/platform_device.h>
12 #include <linux/mtd/physmap.h>
13 #include <linux/serial.h>
14 #include <linux/serial_8250.h>
15 #include <linux/ioport.h>
16 #include <linux/io.h>
17 #include <linux/vlynq.h>
18 #include <linux/leds.h>
19 #include <linux/string.h>
20 #include <linux/etherdevice.h>
21 #include <linux/phy.h>
22 #include <linux/phy_fixed.h>
23 #include <linux/gpio.h>
24 #include <linux/clk.h>
25 
26 #include <asm/addrspace.h>
27 #include <asm/mach-ar7/ar7.h>
28 #include <asm/mach-ar7/prom.h>
29 
30 /*****************************************************************************
31  * VLYNQ Bus
32  ****************************************************************************/
33 struct plat_vlynq_data {
34 	struct plat_vlynq_ops ops;
35 	int gpio_bit;
36 	int reset_bit;
37 };
38 
39 static int vlynq_on(struct vlynq_device *dev)
40 {
41 	int ret;
42 	struct plat_vlynq_data *pdata = dev->dev.platform_data;
43 
44 	ret = gpio_request(pdata->gpio_bit, "vlynq");
45 	if (ret)
46 		goto out;
47 
48 	ar7_device_reset(pdata->reset_bit);
49 
50 	ret = ar7_gpio_disable(pdata->gpio_bit);
51 	if (ret)
52 		goto out_enabled;
53 
54 	ret = ar7_gpio_enable(pdata->gpio_bit);
55 	if (ret)
56 		goto out_enabled;
57 
58 	ret = gpio_direction_output(pdata->gpio_bit, 0);
59 	if (ret)
60 		goto out_gpio_enabled;
61 
62 	msleep(50);
63 
64 	gpio_set_value(pdata->gpio_bit, 1);
65 
66 	msleep(50);
67 
68 	return 0;
69 
70 out_gpio_enabled:
71 	ar7_gpio_disable(pdata->gpio_bit);
72 out_enabled:
73 	ar7_device_disable(pdata->reset_bit);
74 	gpio_free(pdata->gpio_bit);
75 out:
76 	return ret;
77 }
78 
79 static void vlynq_off(struct vlynq_device *dev)
80 {
81 	struct plat_vlynq_data *pdata = dev->dev.platform_data;
82 
83 	ar7_gpio_disable(pdata->gpio_bit);
84 	gpio_free(pdata->gpio_bit);
85 	ar7_device_disable(pdata->reset_bit);
86 }
87 
88 static struct resource vlynq_low_res[] = {
89 	{
90 		.name	= "regs",
91 		.flags	= IORESOURCE_MEM,
92 		.start	= AR7_REGS_VLYNQ0,
93 		.end	= AR7_REGS_VLYNQ0 + 0xff,
94 	},
95 	{
96 		.name	= "irq",
97 		.flags	= IORESOURCE_IRQ,
98 		.start	= 29,
99 		.end	= 29,
100 	},
101 	{
102 		.name	= "mem",
103 		.flags	= IORESOURCE_MEM,
104 		.start	= 0x04000000,
105 		.end	= 0x04ffffff,
106 	},
107 	{
108 		.name	= "devirq",
109 		.flags	= IORESOURCE_IRQ,
110 		.start	= 80,
111 		.end	= 111,
112 	},
113 };
114 
115 static struct resource vlynq_high_res[] = {
116 	{
117 		.name	= "regs",
118 		.flags	= IORESOURCE_MEM,
119 		.start	= AR7_REGS_VLYNQ1,
120 		.end	= AR7_REGS_VLYNQ1 + 0xff,
121 	},
122 	{
123 		.name	= "irq",
124 		.flags	= IORESOURCE_IRQ,
125 		.start	= 33,
126 		.end	= 33,
127 	},
128 	{
129 		.name	= "mem",
130 		.flags	= IORESOURCE_MEM,
131 		.start	= 0x0c000000,
132 		.end	= 0x0cffffff,
133 	},
134 	{
135 		.name	= "devirq",
136 		.flags	= IORESOURCE_IRQ,
137 		.start	= 112,
138 		.end	= 143,
139 	},
140 };
141 
142 static struct plat_vlynq_data vlynq_low_data = {
143 	.ops = {
144 		.on	= vlynq_on,
145 		.off	= vlynq_off,
146 	},
147 	.reset_bit	= 20,
148 	.gpio_bit	= 18,
149 };
150 
151 static struct plat_vlynq_data vlynq_high_data = {
152 	.ops = {
153 		.on	= vlynq_on,
154 		.off	= vlynq_off,
155 	},
156 	.reset_bit	= 16,
157 	.gpio_bit	= 19,
158 };
159 
160 static struct platform_device vlynq_low = {
161 	.id		= 0,
162 	.name		= "vlynq",
163 	.dev = {
164 		.platform_data	= &vlynq_low_data,
165 	},
166 	.resource	= vlynq_low_res,
167 	.num_resources	= ARRAY_SIZE(vlynq_low_res),
168 };
169 
170 static struct platform_device vlynq_high = {
171 	.id		= 1,
172 	.name		= "vlynq",
173 	.dev = {
174 		.platform_data	= &vlynq_high_data,
175 	},
176 	.resource	= vlynq_high_res,
177 	.num_resources	= ARRAY_SIZE(vlynq_high_res),
178 };
179 
180 /*****************************************************************************
181  * Flash
182  ****************************************************************************/
183 static struct resource physmap_flash_resource = {
184 	.name	= "mem",
185 	.flags	= IORESOURCE_MEM,
186 	.start	= 0x10000000,
187 	.end	= 0x107fffff,
188 };
189 
190 static const char *ar7_probe_types[] = { "ar7part", NULL };
191 
192 static struct physmap_flash_data physmap_flash_data = {
193 	.width	= 2,
194 	.part_probe_types = ar7_probe_types,
195 };
196 
197 static struct platform_device physmap_flash = {
198 	.name		= "physmap-flash",
199 	.dev = {
200 		.platform_data	= &physmap_flash_data,
201 	},
202 	.resource	= &physmap_flash_resource,
203 	.num_resources	= 1,
204 };
205 
206 /*****************************************************************************
207  * Ethernet
208  ****************************************************************************/
209 static struct resource cpmac_low_res[] = {
210 	{
211 		.name	= "regs",
212 		.flags	= IORESOURCE_MEM,
213 		.start	= AR7_REGS_MAC0,
214 		.end	= AR7_REGS_MAC0 + 0x7ff,
215 	},
216 	{
217 		.name	= "irq",
218 		.flags	= IORESOURCE_IRQ,
219 		.start	= 27,
220 		.end	= 27,
221 	},
222 };
223 
224 static struct resource cpmac_high_res[] = {
225 	{
226 		.name	= "regs",
227 		.flags	= IORESOURCE_MEM,
228 		.start	= AR7_REGS_MAC1,
229 		.end	= AR7_REGS_MAC1 + 0x7ff,
230 	},
231 	{
232 		.name	= "irq",
233 		.flags	= IORESOURCE_IRQ,
234 		.start	= 41,
235 		.end	= 41,
236 	},
237 };
238 
239 static struct fixed_phy_status fixed_phy_status __initdata = {
240 	.link		= 1,
241 	.speed		= 100,
242 	.duplex		= 1,
243 };
244 
245 static struct plat_cpmac_data cpmac_low_data = {
246 	.reset_bit	= 17,
247 	.power_bit	= 20,
248 	.phy_mask	= 0x80000000,
249 };
250 
251 static struct plat_cpmac_data cpmac_high_data = {
252 	.reset_bit	= 21,
253 	.power_bit	= 22,
254 	.phy_mask	= 0x7fffffff,
255 };
256 
257 static u64 cpmac_dma_mask = DMA_BIT_MASK(32);
258 
259 static struct platform_device cpmac_low = {
260 	.id		= 0,
261 	.name		= "cpmac",
262 	.dev = {
263 		.dma_mask		= &cpmac_dma_mask,
264 		.coherent_dma_mask	= DMA_BIT_MASK(32),
265 		.platform_data		= &cpmac_low_data,
266 	},
267 	.resource	= cpmac_low_res,
268 	.num_resources	= ARRAY_SIZE(cpmac_low_res),
269 };
270 
271 static struct platform_device cpmac_high = {
272 	.id		= 1,
273 	.name		= "cpmac",
274 	.dev = {
275 		.dma_mask		= &cpmac_dma_mask,
276 		.coherent_dma_mask	= DMA_BIT_MASK(32),
277 		.platform_data		= &cpmac_high_data,
278 	},
279 	.resource	= cpmac_high_res,
280 	.num_resources	= ARRAY_SIZE(cpmac_high_res),
281 };
282 
283 static void __init cpmac_get_mac(int instance, unsigned char *dev_addr)
284 {
285 	char name[5], *mac;
286 
287 	sprintf(name, "mac%c", 'a' + instance);
288 	mac = prom_getenv(name);
289 	if (!mac && instance) {
290 		sprintf(name, "mac%c", 'a');
291 		mac = prom_getenv(name);
292 	}
293 
294 	if (mac) {
295 		if (!mac_pton(mac, dev_addr)) {
296 			pr_warn("cannot parse mac address, using random address\n");
297 			eth_random_addr(dev_addr);
298 		}
299 	} else
300 		eth_random_addr(dev_addr);
301 }
302 
303 /*****************************************************************************
304  * USB
305  ****************************************************************************/
306 static struct resource usb_res[] = {
307 	{
308 		.name	= "regs",
309 		.flags	= IORESOURCE_MEM,
310 		.start	= AR7_REGS_USB,
311 		.end	= AR7_REGS_USB + 0xff,
312 	},
313 	{
314 		.name	= "irq",
315 		.flags	= IORESOURCE_IRQ,
316 		.start	= 32,
317 		.end	= 32,
318 	},
319 	{
320 		.name	= "mem",
321 		.flags	= IORESOURCE_MEM,
322 		.start	= 0x03400000,
323 		.end	= 0x03401fff,
324 	},
325 };
326 
327 static struct platform_device ar7_udc = {
328 	.name		= "ar7_udc",
329 	.resource	= usb_res,
330 	.num_resources	= ARRAY_SIZE(usb_res),
331 };
332 
333 /*****************************************************************************
334  * LEDs
335  ****************************************************************************/
336 static const struct gpio_led default_leds[] = {
337 	{
338 		.name			= "status",
339 		.gpio			= 8,
340 		.active_low		= 1,
341 	},
342 };
343 
344 static const struct gpio_led titan_leds[] = {
345 	{ .name = "status", .gpio = 8, .active_low = 1, },
346 	{ .name = "wifi", .gpio = 13, .active_low = 1, },
347 };
348 
349 static const struct gpio_led dsl502t_leds[] = {
350 	{
351 		.name			= "status",
352 		.gpio			= 9,
353 		.active_low		= 1,
354 	},
355 	{
356 		.name			= "ethernet",
357 		.gpio			= 7,
358 		.active_low		= 1,
359 	},
360 	{
361 		.name			= "usb",
362 		.gpio			= 12,
363 		.active_low		= 1,
364 	},
365 };
366 
367 static const struct gpio_led dg834g_leds[] = {
368 	{
369 		.name			= "ppp",
370 		.gpio			= 6,
371 		.active_low		= 1,
372 	},
373 	{
374 		.name			= "status",
375 		.gpio			= 7,
376 		.active_low		= 1,
377 	},
378 	{
379 		.name			= "adsl",
380 		.gpio			= 8,
381 		.active_low		= 1,
382 	},
383 	{
384 		.name			= "wifi",
385 		.gpio			= 12,
386 		.active_low		= 1,
387 	},
388 	{
389 		.name			= "power",
390 		.gpio			= 14,
391 		.active_low		= 1,
392 		.default_trigger	= "default-on",
393 	},
394 };
395 
396 static const struct gpio_led fb_sl_leds[] = {
397 	{
398 		.name			= "1",
399 		.gpio			= 7,
400 	},
401 	{
402 		.name			= "2",
403 		.gpio			= 13,
404 		.active_low		= 1,
405 	},
406 	{
407 		.name			= "3",
408 		.gpio			= 10,
409 		.active_low		= 1,
410 	},
411 	{
412 		.name			= "4",
413 		.gpio			= 12,
414 		.active_low		= 1,
415 	},
416 	{
417 		.name			= "5",
418 		.gpio			= 9,
419 		.active_low		= 1,
420 	},
421 };
422 
423 static const struct gpio_led fb_fon_leds[] = {
424 	{
425 		.name			= "1",
426 		.gpio			= 8,
427 	},
428 	{
429 		.name			= "2",
430 		.gpio			= 3,
431 		.active_low		= 1,
432 	},
433 	{
434 		.name			= "3",
435 		.gpio			= 5,
436 	},
437 	{
438 		.name			= "4",
439 		.gpio			= 4,
440 		.active_low		= 1,
441 	},
442 	{
443 		.name			= "5",
444 		.gpio			= 11,
445 		.active_low		= 1,
446 	},
447 };
448 
449 static const struct gpio_led gt701_leds[] = {
450 	{
451 		.name			= "inet:green",
452 		.gpio			= 13,
453 		.active_low		= 1,
454 	},
455 	{
456 		.name			= "usb",
457 		.gpio			= 12,
458 		.active_low		= 1,
459 	},
460 	{
461 		.name			= "inet:red",
462 		.gpio			= 9,
463 		.active_low		= 1,
464 	},
465 	{
466 		.name			= "power:red",
467 		.gpio			= 7,
468 		.active_low		= 1,
469 	},
470 	{
471 		.name			= "power:green",
472 		.gpio			= 8,
473 		.active_low		= 1,
474 		.default_trigger	= "default-on",
475 	},
476 	{
477 		.name			= "ethernet",
478 		.gpio			= 10,
479 		.active_low		= 1,
480 	},
481 };
482 
483 static struct gpio_led_platform_data ar7_led_data;
484 
485 static struct platform_device ar7_gpio_leds = {
486 	.name = "leds-gpio",
487 	.dev = {
488 		.platform_data = &ar7_led_data,
489 	}
490 };
491 
492 static void __init detect_leds(void)
493 {
494 	char *prid, *usb_prod;
495 
496 	/* Default LEDs */
497 	ar7_led_data.num_leds = ARRAY_SIZE(default_leds);
498 	ar7_led_data.leds = default_leds;
499 
500 	/* FIXME: the whole thing is unreliable */
501 	prid = prom_getenv("ProductID");
502 	usb_prod = prom_getenv("usb_prod");
503 
504 	/* If we can't get the product id from PROM, use the default LEDs */
505 	if (!prid)
506 		return;
507 
508 	if (strstr(prid, "Fritz_Box_FON")) {
509 		ar7_led_data.num_leds = ARRAY_SIZE(fb_fon_leds);
510 		ar7_led_data.leds = fb_fon_leds;
511 	} else if (strstr(prid, "Fritz_Box_")) {
512 		ar7_led_data.num_leds = ARRAY_SIZE(fb_sl_leds);
513 		ar7_led_data.leds = fb_sl_leds;
514 	} else if ((!strcmp(prid, "AR7RD") || !strcmp(prid, "AR7DB"))
515 		&& usb_prod != NULL && strstr(usb_prod, "DSL-502T")) {
516 		ar7_led_data.num_leds = ARRAY_SIZE(dsl502t_leds);
517 		ar7_led_data.leds = dsl502t_leds;
518 	} else if (strstr(prid, "DG834")) {
519 		ar7_led_data.num_leds = ARRAY_SIZE(dg834g_leds);
520 		ar7_led_data.leds = dg834g_leds;
521 	} else if (strstr(prid, "CYWM") || strstr(prid, "CYWL")) {
522 		ar7_led_data.num_leds = ARRAY_SIZE(titan_leds);
523 		ar7_led_data.leds = titan_leds;
524 	} else if (strstr(prid, "GT701")) {
525 		ar7_led_data.num_leds = ARRAY_SIZE(gt701_leds);
526 		ar7_led_data.leds = gt701_leds;
527 	}
528 }
529 
530 /*****************************************************************************
531  * Watchdog
532  ****************************************************************************/
533 static struct resource ar7_wdt_res = {
534 	.name		= "regs",
535 	.flags		= IORESOURCE_MEM,
536 	.start		= -1,	/* Filled at runtime */
537 	.end		= -1,	/* Filled at runtime */
538 };
539 
540 static struct platform_device ar7_wdt = {
541 	.name		= "ar7_wdt",
542 	.resource	= &ar7_wdt_res,
543 	.num_resources	= 1,
544 };
545 
546 /*****************************************************************************
547  * Init
548  ****************************************************************************/
549 static int __init ar7_register_uarts(void)
550 {
551 #ifdef CONFIG_SERIAL_8250
552 	static struct uart_port uart_port __initdata;
553 	struct clk *bus_clk;
554 	int res;
555 
556 	memset(&uart_port, 0, sizeof(struct uart_port));
557 
558 	bus_clk = clk_get(NULL, "bus");
559 	if (IS_ERR(bus_clk))
560 		panic("unable to get bus clk");
561 
562 	uart_port.type		= PORT_AR7;
563 	uart_port.uartclk	= clk_get_rate(bus_clk) / 2;
564 	uart_port.iotype	= UPIO_MEM32;
565 	uart_port.flags		= UPF_FIXED_TYPE | UPF_BOOT_AUTOCONF;
566 	uart_port.regshift	= 2;
567 
568 	uart_port.line		= 0;
569 	uart_port.irq		= AR7_IRQ_UART0;
570 	uart_port.mapbase	= AR7_REGS_UART0;
571 	uart_port.membase	= ioremap(uart_port.mapbase, 256);
572 
573 	res = early_serial_setup(&uart_port);
574 	if (res)
575 		return res;
576 
577 	/* Only TNETD73xx have a second serial port */
578 	if (ar7_has_second_uart()) {
579 		uart_port.line		= 1;
580 		uart_port.irq		= AR7_IRQ_UART1;
581 		uart_port.mapbase	= UR8_REGS_UART1;
582 		uart_port.membase	= ioremap(uart_port.mapbase, 256);
583 
584 		res = early_serial_setup(&uart_port);
585 		if (res)
586 			return res;
587 	}
588 #endif
589 
590 	return 0;
591 }
592 
593 static void __init titan_fixup_devices(void)
594 {
595 	/* Set vlynq0 data */
596 	vlynq_low_data.reset_bit = 15;
597 	vlynq_low_data.gpio_bit = 14;
598 
599 	/* Set vlynq1 data */
600 	vlynq_high_data.reset_bit = 16;
601 	vlynq_high_data.gpio_bit = 7;
602 
603 	/* Set vlynq0 resources */
604 	vlynq_low_res[0].start = TITAN_REGS_VLYNQ0;
605 	vlynq_low_res[0].end = TITAN_REGS_VLYNQ0 + 0xff;
606 	vlynq_low_res[1].start = 33;
607 	vlynq_low_res[1].end = 33;
608 	vlynq_low_res[2].start = 0x0c000000;
609 	vlynq_low_res[2].end = 0x0fffffff;
610 	vlynq_low_res[3].start = 80;
611 	vlynq_low_res[3].end = 111;
612 
613 	/* Set vlynq1 resources */
614 	vlynq_high_res[0].start = TITAN_REGS_VLYNQ1;
615 	vlynq_high_res[0].end = TITAN_REGS_VLYNQ1 + 0xff;
616 	vlynq_high_res[1].start = 34;
617 	vlynq_high_res[1].end = 34;
618 	vlynq_high_res[2].start = 0x40000000;
619 	vlynq_high_res[2].end = 0x43ffffff;
620 	vlynq_high_res[3].start = 112;
621 	vlynq_high_res[3].end = 143;
622 
623 	/* Set cpmac0 data */
624 	cpmac_low_data.phy_mask = 0x40000000;
625 
626 	/* Set cpmac1 data */
627 	cpmac_high_data.phy_mask = 0x80000000;
628 
629 	/* Set cpmac0 resources */
630 	cpmac_low_res[0].start = TITAN_REGS_MAC0;
631 	cpmac_low_res[0].end = TITAN_REGS_MAC0 + 0x7ff;
632 
633 	/* Set cpmac1 resources */
634 	cpmac_high_res[0].start = TITAN_REGS_MAC1;
635 	cpmac_high_res[0].end = TITAN_REGS_MAC1 + 0x7ff;
636 }
637 
638 static int __init ar7_register_devices(void)
639 {
640 	void __iomem *bootcr;
641 	u32 val;
642 	int res;
643 
644 	res = ar7_gpio_init();
645 	if (res)
646 		pr_warn("unable to register gpios: %d\n", res);
647 
648 	res = ar7_register_uarts();
649 	if (res)
650 		pr_err("unable to setup uart(s): %d\n", res);
651 
652 	res = platform_device_register(&physmap_flash);
653 	if (res)
654 		pr_warn("unable to register physmap-flash: %d\n", res);
655 
656 	if (ar7_is_titan())
657 		titan_fixup_devices();
658 
659 	ar7_device_disable(vlynq_low_data.reset_bit);
660 	res = platform_device_register(&vlynq_low);
661 	if (res)
662 		pr_warn("unable to register vlynq-low: %d\n", res);
663 
664 	if (ar7_has_high_vlynq()) {
665 		ar7_device_disable(vlynq_high_data.reset_bit);
666 		res = platform_device_register(&vlynq_high);
667 		if (res)
668 			pr_warn("unable to register vlynq-high: %d\n", res);
669 	}
670 
671 	if (ar7_has_high_cpmac()) {
672 		res = fixed_phy_add(PHY_POLL, cpmac_high.id,
673 				    &fixed_phy_status);
674 		if (!res) {
675 			cpmac_get_mac(1, cpmac_high_data.dev_addr);
676 
677 			res = platform_device_register(&cpmac_high);
678 			if (res)
679 				pr_warn("unable to register cpmac-high: %d\n",
680 					res);
681 		} else
682 			pr_warn("unable to add cpmac-high phy: %d\n", res);
683 	} else
684 		cpmac_low_data.phy_mask = 0xffffffff;
685 
686 	res = fixed_phy_add(PHY_POLL, cpmac_low.id, &fixed_phy_status);
687 	if (!res) {
688 		cpmac_get_mac(0, cpmac_low_data.dev_addr);
689 		res = platform_device_register(&cpmac_low);
690 		if (res)
691 			pr_warn("unable to register cpmac-low: %d\n", res);
692 	} else
693 		pr_warn("unable to add cpmac-low phy: %d\n", res);
694 
695 	detect_leds();
696 	res = platform_device_register(&ar7_gpio_leds);
697 	if (res)
698 		pr_warn("unable to register leds: %d\n", res);
699 
700 	res = platform_device_register(&ar7_udc);
701 	if (res)
702 		pr_warn("unable to register usb slave: %d\n", res);
703 
704 	/* Register watchdog only if enabled in hardware */
705 	bootcr = ioremap(AR7_REGS_DCL, 4);
706 	val = readl(bootcr);
707 	iounmap(bootcr);
708 	if (val & AR7_WDT_HW_ENA) {
709 		if (ar7_has_high_vlynq())
710 			ar7_wdt_res.start = UR8_REGS_WDT;
711 		else
712 			ar7_wdt_res.start = AR7_REGS_WDT;
713 
714 		ar7_wdt_res.end = ar7_wdt_res.start + 0x20;
715 		res = platform_device_register(&ar7_wdt);
716 		if (res)
717 			pr_warn("unable to register watchdog: %d\n", res);
718 	}
719 
720 	return 0;
721 }
722 device_initcall(ar7_register_devices);
723