1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * DBAu1000/1500/1100 PBAu1100/1500 board support
4  *
5  * Copyright 2000, 2008 MontaVista Software Inc.
6  * Author: MontaVista Software, Inc. <source@mvista.com>
7  */
8 
9 #include <linux/clk.h>
10 #include <linux/dma-mapping.h>
11 #include <linux/gpio.h>
12 #include <linux/gpio/machine.h>
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
15 #include <linux/leds.h>
16 #include <linux/mmc/host.h>
17 #include <linux/module.h>
18 #include <linux/platform_device.h>
19 #include <linux/pm.h>
20 #include <linux/spi/spi.h>
21 #include <linux/spi/spi_gpio.h>
22 #include <linux/spi/ads7846.h>
23 #include <asm/mach-au1x00/au1000.h>
24 #include <asm/mach-au1x00/gpio-au1000.h>
25 #include <asm/mach-au1x00/au1000_dma.h>
26 #include <asm/mach-au1x00/au1100_mmc.h>
27 #include <asm/mach-db1x00/bcsr.h>
28 #include <asm/reboot.h>
29 #include <prom.h>
30 #include "platform.h"
31 
32 #define F_SWAPPED (bcsr_read(BCSR_STATUS) & BCSR_STATUS_DB1000_SWAPBOOT)
33 
34 const char *get_system_type(void);
35 
36 int __init db1000_board_setup(void)
37 {
38 	/* initialize board register space */
39 	bcsr_init(DB1000_BCSR_PHYS_ADDR,
40 		  DB1000_BCSR_PHYS_ADDR + DB1000_BCSR_HEXLED_OFS);
41 
42 	switch (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI))) {
43 	case BCSR_WHOAMI_DB1000:
44 	case BCSR_WHOAMI_DB1500:
45 	case BCSR_WHOAMI_DB1100:
46 	case BCSR_WHOAMI_PB1500:
47 	case BCSR_WHOAMI_PB1500R2:
48 	case BCSR_WHOAMI_PB1100:
49 		pr_info("AMD Alchemy %s Board\n", get_system_type());
50 		return 0;
51 	}
52 	return -ENODEV;
53 }
54 
55 static int db1500_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
56 {
57 	if ((slot < 12) || (slot > 13) || pin == 0)
58 		return -1;
59 	if (slot == 12)
60 		return (pin == 1) ? AU1500_PCI_INTA : 0xff;
61 	if (slot == 13) {
62 		switch (pin) {
63 		case 1: return AU1500_PCI_INTA;
64 		case 2: return AU1500_PCI_INTB;
65 		case 3: return AU1500_PCI_INTC;
66 		case 4: return AU1500_PCI_INTD;
67 		}
68 	}
69 	return -1;
70 }
71 
72 static u64 au1xxx_all_dmamask = DMA_BIT_MASK(32);
73 
74 static struct resource alchemy_pci_host_res[] = {
75 	[0] = {
76 		.start	= AU1500_PCI_PHYS_ADDR,
77 		.end	= AU1500_PCI_PHYS_ADDR + 0xfff,
78 		.flags	= IORESOURCE_MEM,
79 	},
80 };
81 
82 static struct alchemy_pci_platdata db1500_pci_pd = {
83 	.board_map_irq	= db1500_map_pci_irq,
84 };
85 
86 static struct platform_device db1500_pci_host_dev = {
87 	.dev.platform_data = &db1500_pci_pd,
88 	.name		= "alchemy-pci",
89 	.id		= 0,
90 	.num_resources	= ARRAY_SIZE(alchemy_pci_host_res),
91 	.resource	= alchemy_pci_host_res,
92 };
93 
94 int __init db1500_pci_setup(void)
95 {
96 	return platform_device_register(&db1500_pci_host_dev);
97 }
98 
99 static struct resource au1100_lcd_resources[] = {
100 	[0] = {
101 		.start	= AU1100_LCD_PHYS_ADDR,
102 		.end	= AU1100_LCD_PHYS_ADDR + 0x800 - 1,
103 		.flags	= IORESOURCE_MEM,
104 	},
105 	[1] = {
106 		.start	= AU1100_LCD_INT,
107 		.end	= AU1100_LCD_INT,
108 		.flags	= IORESOURCE_IRQ,
109 	}
110 };
111 
112 static struct platform_device au1100_lcd_device = {
113 	.name		= "au1100-lcd",
114 	.id		= 0,
115 	.dev = {
116 		.dma_mask		= &au1xxx_all_dmamask,
117 		.coherent_dma_mask	= DMA_BIT_MASK(32),
118 	},
119 	.num_resources	= ARRAY_SIZE(au1100_lcd_resources),
120 	.resource	= au1100_lcd_resources,
121 };
122 
123 static struct resource alchemy_ac97c_res[] = {
124 	[0] = {
125 		.start	= AU1000_AC97_PHYS_ADDR,
126 		.end	= AU1000_AC97_PHYS_ADDR + 0xfff,
127 		.flags	= IORESOURCE_MEM,
128 	},
129 	[1] = {
130 		.start	= DMA_ID_AC97C_TX,
131 		.end	= DMA_ID_AC97C_TX,
132 		.flags	= IORESOURCE_DMA,
133 	},
134 	[2] = {
135 		.start	= DMA_ID_AC97C_RX,
136 		.end	= DMA_ID_AC97C_RX,
137 		.flags	= IORESOURCE_DMA,
138 	},
139 };
140 
141 static struct platform_device alchemy_ac97c_dev = {
142 	.name		= "alchemy-ac97c",
143 	.id		= -1,
144 	.resource	= alchemy_ac97c_res,
145 	.num_resources	= ARRAY_SIZE(alchemy_ac97c_res),
146 };
147 
148 static struct platform_device alchemy_ac97c_dma_dev = {
149 	.name		= "alchemy-pcm-dma",
150 	.id		= 0,
151 };
152 
153 static struct platform_device db1x00_codec_dev = {
154 	.name		= "ac97-codec",
155 	.id		= -1,
156 };
157 
158 static struct platform_device db1x00_audio_dev = {
159 	.name		= "db1000-audio",
160 	.dev = {
161 		.dma_mask		= &au1xxx_all_dmamask,
162 		.coherent_dma_mask	= DMA_BIT_MASK(32),
163 	},
164 };
165 
166 /******************************************************************************/
167 
168 static irqreturn_t db1100_mmc_cd(int irq, void *ptr)
169 {
170 	void (*mmc_cd)(struct mmc_host *, unsigned long);
171 	/* link against CONFIG_MMC=m */
172 	mmc_cd = symbol_get(mmc_detect_change);
173 	mmc_cd(ptr, msecs_to_jiffies(500));
174 	symbol_put(mmc_detect_change);
175 
176 	return IRQ_HANDLED;
177 }
178 
179 static int db1100_mmc_cd_setup(void *mmc_host, int en)
180 {
181 	int ret = 0, irq;
182 
183 	if (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI)) == BCSR_WHOAMI_DB1100)
184 		irq = AU1100_GPIO19_INT;
185 	else
186 		irq = AU1100_GPIO14_INT;	/* PB1100 SD0 CD# */
187 
188 	if (en) {
189 		irq_set_irq_type(irq, IRQ_TYPE_EDGE_BOTH);
190 		ret = request_irq(irq, db1100_mmc_cd, 0,
191 				  "sd0_cd", mmc_host);
192 	} else
193 		free_irq(irq, mmc_host);
194 	return ret;
195 }
196 
197 static int db1100_mmc1_cd_setup(void *mmc_host, int en)
198 {
199 	int ret = 0, irq;
200 
201 	if (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI)) == BCSR_WHOAMI_DB1100)
202 		irq = AU1100_GPIO20_INT;
203 	else
204 		irq = AU1100_GPIO15_INT;	/* PB1100 SD1 CD# */
205 
206 	if (en) {
207 		irq_set_irq_type(irq, IRQ_TYPE_EDGE_BOTH);
208 		ret = request_irq(irq, db1100_mmc_cd, 0,
209 				  "sd1_cd", mmc_host);
210 	} else
211 		free_irq(irq, mmc_host);
212 	return ret;
213 }
214 
215 static int db1100_mmc_card_readonly(void *mmc_host)
216 {
217 	/* testing suggests that this bit is inverted */
218 	return (bcsr_read(BCSR_STATUS) & BCSR_STATUS_SD0WP) ? 0 : 1;
219 }
220 
221 static int db1100_mmc_card_inserted(void *mmc_host)
222 {
223 	return !alchemy_gpio_get_value(19);
224 }
225 
226 static void db1100_mmc_set_power(void *mmc_host, int state)
227 {
228 	int bit;
229 
230 	if (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI)) == BCSR_WHOAMI_DB1100)
231 		bit = BCSR_BOARD_SD0PWR;
232 	else
233 		bit = BCSR_BOARD_PB1100_SD0PWR;
234 
235 	if (state) {
236 		bcsr_mod(BCSR_BOARD, 0, bit);
237 		msleep(400);	/* stabilization time */
238 	} else
239 		bcsr_mod(BCSR_BOARD, bit, 0);
240 }
241 
242 static void db1100_mmcled_set(struct led_classdev *led, enum led_brightness b)
243 {
244 	if (b != LED_OFF)
245 		bcsr_mod(BCSR_LEDS, BCSR_LEDS_LED0, 0);
246 	else
247 		bcsr_mod(BCSR_LEDS, 0, BCSR_LEDS_LED0);
248 }
249 
250 static struct led_classdev db1100_mmc_led = {
251 	.brightness_set = db1100_mmcled_set,
252 };
253 
254 static int db1100_mmc1_card_readonly(void *mmc_host)
255 {
256 	return (bcsr_read(BCSR_BOARD) & BCSR_BOARD_SD1WP) ? 1 : 0;
257 }
258 
259 static int db1100_mmc1_card_inserted(void *mmc_host)
260 {
261 	return !alchemy_gpio_get_value(20);
262 }
263 
264 static void db1100_mmc1_set_power(void *mmc_host, int state)
265 {
266 	int bit;
267 
268 	if (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI)) == BCSR_WHOAMI_DB1100)
269 		bit = BCSR_BOARD_SD1PWR;
270 	else
271 		bit = BCSR_BOARD_PB1100_SD1PWR;
272 
273 	if (state) {
274 		bcsr_mod(BCSR_BOARD, 0, bit);
275 		msleep(400);	/* stabilization time */
276 	} else
277 		bcsr_mod(BCSR_BOARD, bit, 0);
278 }
279 
280 static void db1100_mmc1led_set(struct led_classdev *led, enum led_brightness b)
281 {
282 	if (b != LED_OFF)
283 		bcsr_mod(BCSR_LEDS, BCSR_LEDS_LED1, 0);
284 	else
285 		bcsr_mod(BCSR_LEDS, 0, BCSR_LEDS_LED1);
286 }
287 
288 static struct led_classdev db1100_mmc1_led = {
289 	.brightness_set = db1100_mmc1led_set,
290 };
291 
292 static struct au1xmmc_platform_data db1100_mmc_platdata[2] = {
293 	[0] = {
294 		.cd_setup	= db1100_mmc_cd_setup,
295 		.set_power	= db1100_mmc_set_power,
296 		.card_inserted	= db1100_mmc_card_inserted,
297 		.card_readonly	= db1100_mmc_card_readonly,
298 		.led		= &db1100_mmc_led,
299 	},
300 	[1] = {
301 		.cd_setup	= db1100_mmc1_cd_setup,
302 		.set_power	= db1100_mmc1_set_power,
303 		.card_inserted	= db1100_mmc1_card_inserted,
304 		.card_readonly	= db1100_mmc1_card_readonly,
305 		.led		= &db1100_mmc1_led,
306 	},
307 };
308 
309 static struct resource au1100_mmc0_resources[] = {
310 	[0] = {
311 		.start	= AU1100_SD0_PHYS_ADDR,
312 		.end	= AU1100_SD0_PHYS_ADDR + 0xfff,
313 		.flags	= IORESOURCE_MEM,
314 	},
315 	[1] = {
316 		.start	= AU1100_SD_INT,
317 		.end	= AU1100_SD_INT,
318 		.flags	= IORESOURCE_IRQ,
319 	},
320 	[2] = {
321 		.start	= DMA_ID_SD0_TX,
322 		.end	= DMA_ID_SD0_TX,
323 		.flags	= IORESOURCE_DMA,
324 	},
325 	[3] = {
326 		.start	= DMA_ID_SD0_RX,
327 		.end	= DMA_ID_SD0_RX,
328 		.flags	= IORESOURCE_DMA,
329 	}
330 };
331 
332 static struct platform_device db1100_mmc0_dev = {
333 	.name		= "au1xxx-mmc",
334 	.id		= 0,
335 	.dev = {
336 		.dma_mask		= &au1xxx_all_dmamask,
337 		.coherent_dma_mask	= DMA_BIT_MASK(32),
338 		.platform_data		= &db1100_mmc_platdata[0],
339 	},
340 	.num_resources	= ARRAY_SIZE(au1100_mmc0_resources),
341 	.resource	= au1100_mmc0_resources,
342 };
343 
344 static struct resource au1100_mmc1_res[] = {
345 	[0] = {
346 		.start	= AU1100_SD1_PHYS_ADDR,
347 		.end	= AU1100_SD1_PHYS_ADDR + 0xfff,
348 		.flags	= IORESOURCE_MEM,
349 	},
350 	[1] = {
351 		.start	= AU1100_SD_INT,
352 		.end	= AU1100_SD_INT,
353 		.flags	= IORESOURCE_IRQ,
354 	},
355 	[2] = {
356 		.start	= DMA_ID_SD1_TX,
357 		.end	= DMA_ID_SD1_TX,
358 		.flags	= IORESOURCE_DMA,
359 	},
360 	[3] = {
361 		.start	= DMA_ID_SD1_RX,
362 		.end	= DMA_ID_SD1_RX,
363 		.flags	= IORESOURCE_DMA,
364 	}
365 };
366 
367 static struct platform_device db1100_mmc1_dev = {
368 	.name		= "au1xxx-mmc",
369 	.id		= 1,
370 	.dev = {
371 		.dma_mask		= &au1xxx_all_dmamask,
372 		.coherent_dma_mask	= DMA_BIT_MASK(32),
373 		.platform_data		= &db1100_mmc_platdata[1],
374 	},
375 	.num_resources	= ARRAY_SIZE(au1100_mmc1_res),
376 	.resource	= au1100_mmc1_res,
377 };
378 
379 /******************************************************************************/
380 
381 static struct ads7846_platform_data db1100_touch_pd = {
382 	.model		= 7846,
383 	.vref_mv	= 3300,
384 };
385 
386 static struct spi_gpio_platform_data db1100_spictl_pd = {
387 	.num_chipselect = 1,
388 };
389 
390 static struct gpiod_lookup_table db1100_touch_gpio_table = {
391 	.dev_id = "spi0.0",
392 	.table = {
393 		GPIO_LOOKUP("alchemy-gpio2", 21,
394 			    "pendown", GPIO_ACTIVE_LOW),
395 		{ }
396 	},
397 };
398 
399 static struct spi_board_info db1100_spi_info[] __initdata = {
400 	[0] = {
401 		.modalias	 = "ads7846",
402 		.max_speed_hz	 = 3250000,
403 		.bus_num	 = 0,
404 		.chip_select	 = 0,
405 		.mode		 = 0,
406 		.irq		 = AU1100_GPIO21_INT,
407 		.platform_data	 = &db1100_touch_pd,
408 	},
409 };
410 
411 static struct platform_device db1100_spi_dev = {
412 	.name		= "spi_gpio",
413 	.id		= 0,
414 	.dev		= {
415 		.platform_data	= &db1100_spictl_pd,
416 		.dma_mask		= &au1xxx_all_dmamask,
417 		.coherent_dma_mask	= DMA_BIT_MASK(32),
418 	},
419 };
420 
421 /*
422  * Alchemy GPIO 2 has its base at 200 so the GPIO lines
423  * 207 thru 210 are GPIOs at offset 7 thru 10 at this chip.
424  */
425 static struct gpiod_lookup_table db1100_spi_gpiod_table = {
426 	.dev_id         = "spi_gpio",
427 	.table          = {
428 		GPIO_LOOKUP("alchemy-gpio2", 9,
429 			    "sck", GPIO_ACTIVE_HIGH),
430 		GPIO_LOOKUP("alchemy-gpio2", 8,
431 			    "mosi", GPIO_ACTIVE_HIGH),
432 		GPIO_LOOKUP("alchemy-gpio2", 7,
433 			    "miso", GPIO_ACTIVE_HIGH),
434 		GPIO_LOOKUP("alchemy-gpio2", 10,
435 			    "cs", GPIO_ACTIVE_HIGH),
436 		{ },
437 	},
438 };
439 
440 static struct platform_device *db1x00_devs[] = {
441 	&db1x00_codec_dev,
442 	&alchemy_ac97c_dma_dev,
443 	&alchemy_ac97c_dev,
444 	&db1x00_audio_dev,
445 };
446 
447 static struct platform_device *db1100_devs[] = {
448 	&au1100_lcd_device,
449 	&db1100_mmc0_dev,
450 	&db1100_mmc1_dev,
451 };
452 
453 int __init db1000_dev_setup(void)
454 {
455 	int board = BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI));
456 	int c0, c1, d0, d1, s0, s1, flashsize = 32,  twosocks = 1;
457 	unsigned long pfc;
458 	struct clk *c, *p;
459 
460 	if (board == BCSR_WHOAMI_DB1500) {
461 		c0 = AU1500_GPIO2_INT;
462 		c1 = AU1500_GPIO5_INT;
463 		d0 = 0;	/* GPIO number, NOT irq! */
464 		d1 = 3; /* GPIO number, NOT irq! */
465 		s0 = AU1500_GPIO1_INT;
466 		s1 = AU1500_GPIO4_INT;
467 	} else if (board == BCSR_WHOAMI_DB1100) {
468 		c0 = AU1100_GPIO2_INT;
469 		c1 = AU1100_GPIO5_INT;
470 		d0 = 0; /* GPIO number, NOT irq! */
471 		d1 = 3; /* GPIO number, NOT irq! */
472 		s0 = AU1100_GPIO1_INT;
473 		s1 = AU1100_GPIO4_INT;
474 
475 		gpio_request(19, "sd0_cd");
476 		gpio_request(20, "sd1_cd");
477 		gpio_direction_input(19);	/* sd0 cd# */
478 		gpio_direction_input(20);	/* sd1 cd# */
479 
480 		/* spi_gpio on SSI0 pins */
481 		pfc = alchemy_rdsys(AU1000_SYS_PINFUNC);
482 		pfc |= (1 << 0);	/* SSI0 pins as GPIOs */
483 		alchemy_wrsys(pfc, AU1000_SYS_PINFUNC);
484 
485 		gpiod_add_lookup_table(&db1100_touch_gpio_table);
486 		spi_register_board_info(db1100_spi_info,
487 					ARRAY_SIZE(db1100_spi_info));
488 
489 		/* link LCD clock to AUXPLL */
490 		p = clk_get(NULL, "auxpll_clk");
491 		c = clk_get(NULL, "lcd_intclk");
492 		if (!IS_ERR(c) && !IS_ERR(p)) {
493 			clk_set_parent(c, p);
494 			clk_set_rate(c, clk_get_rate(p));
495 		}
496 		if (!IS_ERR(c))
497 			clk_put(c);
498 		if (!IS_ERR(p))
499 			clk_put(p);
500 
501 		platform_add_devices(db1100_devs, ARRAY_SIZE(db1100_devs));
502 		gpiod_add_lookup_table(&db1100_spi_gpiod_table);
503 		platform_device_register(&db1100_spi_dev);
504 	} else if (board == BCSR_WHOAMI_DB1000) {
505 		c0 = AU1000_GPIO2_INT;
506 		c1 = AU1000_GPIO5_INT;
507 		d0 = 0; /* GPIO number, NOT irq! */
508 		d1 = 3; /* GPIO number, NOT irq! */
509 		s0 = AU1000_GPIO1_INT;
510 		s1 = AU1000_GPIO4_INT;
511 	} else if ((board == BCSR_WHOAMI_PB1500) ||
512 		   (board == BCSR_WHOAMI_PB1500R2)) {
513 		c0 = AU1500_GPIO203_INT;
514 		d0 = 1; /* GPIO number, NOT irq! */
515 		s0 = AU1500_GPIO202_INT;
516 		twosocks = 0;
517 		flashsize = 64;
518 		/* RTC and daughtercard irqs */
519 		irq_set_irq_type(AU1500_GPIO204_INT, IRQ_TYPE_LEVEL_LOW);
520 		irq_set_irq_type(AU1500_GPIO205_INT, IRQ_TYPE_LEVEL_LOW);
521 		/* EPSON S1D13806 0x1b000000
522 		 * SRAM 1MB/2MB	  0x1a000000
523 		 * DS1693 RTC	  0x0c000000
524 		 */
525 	} else if (board == BCSR_WHOAMI_PB1100) {
526 		c0 = AU1100_GPIO11_INT;
527 		d0 = 9; /* GPIO number, NOT irq! */
528 		s0 = AU1100_GPIO10_INT;
529 		twosocks = 0;
530 		flashsize = 64;
531 		/* pendown, rtc, daughtercard irqs */
532 		irq_set_irq_type(AU1100_GPIO8_INT, IRQ_TYPE_LEVEL_LOW);
533 		irq_set_irq_type(AU1100_GPIO12_INT, IRQ_TYPE_LEVEL_LOW);
534 		irq_set_irq_type(AU1100_GPIO13_INT, IRQ_TYPE_LEVEL_LOW);
535 		/* EPSON S1D13806 0x1b000000
536 		 * SRAM 1MB/2MB	  0x1a000000
537 		 * DiskOnChip	  0x0d000000
538 		 * DS1693 RTC	  0x0c000000
539 		 */
540 		platform_add_devices(db1100_devs, ARRAY_SIZE(db1100_devs));
541 	} else
542 		return 0; /* unknown board, no further dev setup to do */
543 
544 	irq_set_irq_type(c0, IRQ_TYPE_LEVEL_LOW);
545 	irq_set_irq_type(s0, IRQ_TYPE_LEVEL_LOW);
546 
547 	db1x_register_pcmcia_socket(
548 		AU1000_PCMCIA_ATTR_PHYS_ADDR,
549 		AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x000400000 - 1,
550 		AU1000_PCMCIA_MEM_PHYS_ADDR,
551 		AU1000_PCMCIA_MEM_PHYS_ADDR  + 0x000400000 - 1,
552 		AU1000_PCMCIA_IO_PHYS_ADDR,
553 		AU1000_PCMCIA_IO_PHYS_ADDR   + 0x000010000 - 1,
554 		c0, d0, /*s0*/0, 0, 0);
555 
556 	if (twosocks) {
557 		irq_set_irq_type(c1, IRQ_TYPE_LEVEL_LOW);
558 		irq_set_irq_type(s1, IRQ_TYPE_LEVEL_LOW);
559 
560 		db1x_register_pcmcia_socket(
561 			AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x004000000,
562 			AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x004400000 - 1,
563 			AU1000_PCMCIA_MEM_PHYS_ADDR  + 0x004000000,
564 			AU1000_PCMCIA_MEM_PHYS_ADDR  + 0x004400000 - 1,
565 			AU1000_PCMCIA_IO_PHYS_ADDR   + 0x004000000,
566 			AU1000_PCMCIA_IO_PHYS_ADDR   + 0x004010000 - 1,
567 			c1, d1, /*s1*/0, 0, 1);
568 	}
569 
570 	platform_add_devices(db1x00_devs, ARRAY_SIZE(db1x00_devs));
571 	db1x_register_norflash(flashsize << 20, 4 /* 32bit */, F_SWAPPED);
572 	return 0;
573 }
574