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Merge arlied/drm-next into drm-misc-next
[mirror_ubuntu-eoan-kernel.git] / arch / arm / mach-ep93xx / core.c
1 /*
2 * arch/arm/mach-ep93xx/core.c
3 * Core routines for Cirrus EP93xx chips.
4 *
5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
6 * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
7 *
8 * Thanks go to Michael Burian and Ray Lehtiniemi for their key
9 * role in the ep93xx linux community.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
15 */
16
17 #define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt
18
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/platform_device.h>
22 #include <linux/interrupt.h>
23 #include <linux/dma-mapping.h>
24 #include <linux/sys_soc.h>
25 #include <linux/irq.h>
26 #include <linux/io.h>
27 #include <linux/gpio.h>
28 #include <linux/leds.h>
29 #include <linux/termios.h>
30 #include <linux/amba/bus.h>
31 #include <linux/amba/serial.h>
32 #include <linux/mtd/physmap.h>
33 #include <linux/i2c.h>
34 #include <linux/gpio/machine.h>
35 #include <linux/spi/spi.h>
36 #include <linux/export.h>
37 #include <linux/irqchip/arm-vic.h>
38 #include <linux/reboot.h>
39 #include <linux/usb/ohci_pdriver.h>
40 #include <linux/random.h>
41
42 #include <mach/hardware.h>
43 #include <linux/platform_data/video-ep93xx.h>
44 #include <linux/platform_data/keypad-ep93xx.h>
45 #include <linux/platform_data/spi-ep93xx.h>
46 #include <mach/gpio-ep93xx.h>
47
48 #include <asm/mach/arch.h>
49 #include <asm/mach/map.h>
50
51 #include "soc.h"
52
53 /*************************************************************************
54 * Static I/O mappings that are needed for all EP93xx platforms
55 *************************************************************************/
56 static struct map_desc ep93xx_io_desc[] __initdata = {
57 {
58 .virtual = EP93XX_AHB_VIRT_BASE,
59 .pfn = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
60 .length = EP93XX_AHB_SIZE,
61 .type = MT_DEVICE,
62 }, {
63 .virtual = EP93XX_APB_VIRT_BASE,
64 .pfn = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
65 .length = EP93XX_APB_SIZE,
66 .type = MT_DEVICE,
67 },
68 };
69
70 void __init ep93xx_map_io(void)
71 {
72 iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
73 }
74
75 /*************************************************************************
76 * EP93xx IRQ handling
77 *************************************************************************/
78 void __init ep93xx_init_irq(void)
79 {
80 vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0);
81 vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0);
82 }
83
84
85 /*************************************************************************
86 * EP93xx System Controller Software Locked register handling
87 *************************************************************************/
88
89 /*
90 * syscon_swlock prevents anything else from writing to the syscon
91 * block while a software locked register is being written.
92 */
93 static DEFINE_SPINLOCK(syscon_swlock);
94
95 void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
96 {
97 unsigned long flags;
98
99 spin_lock_irqsave(&syscon_swlock, flags);
100
101 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
102 __raw_writel(val, reg);
103
104 spin_unlock_irqrestore(&syscon_swlock, flags);
105 }
106
107 void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
108 {
109 unsigned long flags;
110 unsigned int val;
111
112 spin_lock_irqsave(&syscon_swlock, flags);
113
114 val = __raw_readl(EP93XX_SYSCON_DEVCFG);
115 val &= ~clear_bits;
116 val |= set_bits;
117 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
118 __raw_writel(val, EP93XX_SYSCON_DEVCFG);
119
120 spin_unlock_irqrestore(&syscon_swlock, flags);
121 }
122
123 /**
124 * ep93xx_chip_revision() - returns the EP93xx chip revision
125 *
126 * See <mach/platform.h> for more information.
127 */
128 unsigned int ep93xx_chip_revision(void)
129 {
130 unsigned int v;
131
132 v = __raw_readl(EP93XX_SYSCON_SYSCFG);
133 v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
134 v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
135 return v;
136 }
137 EXPORT_SYMBOL_GPL(ep93xx_chip_revision);
138
139 /*************************************************************************
140 * EP93xx GPIO
141 *************************************************************************/
142 static struct resource ep93xx_gpio_resource[] = {
143 DEFINE_RES_MEM(EP93XX_GPIO_PHYS_BASE, 0xcc),
144 };
145
146 static struct platform_device ep93xx_gpio_device = {
147 .name = "gpio-ep93xx",
148 .id = -1,
149 .num_resources = ARRAY_SIZE(ep93xx_gpio_resource),
150 .resource = ep93xx_gpio_resource,
151 };
152
153 /*************************************************************************
154 * EP93xx peripheral handling
155 *************************************************************************/
156 #define EP93XX_UART_MCR_OFFSET (0x0100)
157
158 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
159 void __iomem *base, unsigned int mctrl)
160 {
161 unsigned int mcr;
162
163 mcr = 0;
164 if (mctrl & TIOCM_RTS)
165 mcr |= 2;
166 if (mctrl & TIOCM_DTR)
167 mcr |= 1;
168
169 __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
170 }
171
172 static struct amba_pl010_data ep93xx_uart_data = {
173 .set_mctrl = ep93xx_uart_set_mctrl,
174 };
175
176 static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE,
177 { IRQ_EP93XX_UART1 }, &ep93xx_uart_data);
178
179 static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE,
180 { IRQ_EP93XX_UART2 }, NULL);
181
182 static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE,
183 { IRQ_EP93XX_UART3 }, &ep93xx_uart_data);
184
185 static struct resource ep93xx_rtc_resource[] = {
186 DEFINE_RES_MEM(EP93XX_RTC_PHYS_BASE, 0x10c),
187 };
188
189 static struct platform_device ep93xx_rtc_device = {
190 .name = "ep93xx-rtc",
191 .id = -1,
192 .num_resources = ARRAY_SIZE(ep93xx_rtc_resource),
193 .resource = ep93xx_rtc_resource,
194 };
195
196 /*************************************************************************
197 * EP93xx OHCI USB Host
198 *************************************************************************/
199
200 static struct clk *ep93xx_ohci_host_clock;
201
202 static int ep93xx_ohci_power_on(struct platform_device *pdev)
203 {
204 if (!ep93xx_ohci_host_clock) {
205 ep93xx_ohci_host_clock = devm_clk_get(&pdev->dev, NULL);
206 if (IS_ERR(ep93xx_ohci_host_clock))
207 return PTR_ERR(ep93xx_ohci_host_clock);
208 }
209
210 return clk_enable(ep93xx_ohci_host_clock);
211 }
212
213 static void ep93xx_ohci_power_off(struct platform_device *pdev)
214 {
215 clk_disable(ep93xx_ohci_host_clock);
216 }
217
218 static struct usb_ohci_pdata ep93xx_ohci_pdata = {
219 .power_on = ep93xx_ohci_power_on,
220 .power_off = ep93xx_ohci_power_off,
221 .power_suspend = ep93xx_ohci_power_off,
222 };
223
224 static struct resource ep93xx_ohci_resources[] = {
225 DEFINE_RES_MEM(EP93XX_USB_PHYS_BASE, 0x1000),
226 DEFINE_RES_IRQ(IRQ_EP93XX_USB),
227 };
228
229 static u64 ep93xx_ohci_dma_mask = DMA_BIT_MASK(32);
230
231 static struct platform_device ep93xx_ohci_device = {
232 .name = "ohci-platform",
233 .id = -1,
234 .num_resources = ARRAY_SIZE(ep93xx_ohci_resources),
235 .resource = ep93xx_ohci_resources,
236 .dev = {
237 .dma_mask = &ep93xx_ohci_dma_mask,
238 .coherent_dma_mask = DMA_BIT_MASK(32),
239 .platform_data = &ep93xx_ohci_pdata,
240 },
241 };
242
243 /*************************************************************************
244 * EP93xx physmap'ed flash
245 *************************************************************************/
246 static struct physmap_flash_data ep93xx_flash_data;
247
248 static struct resource ep93xx_flash_resource = {
249 .flags = IORESOURCE_MEM,
250 };
251
252 static struct platform_device ep93xx_flash = {
253 .name = "physmap-flash",
254 .id = 0,
255 .dev = {
256 .platform_data = &ep93xx_flash_data,
257 },
258 .num_resources = 1,
259 .resource = &ep93xx_flash_resource,
260 };
261
262 /**
263 * ep93xx_register_flash() - Register the external flash device.
264 * @width: bank width in octets
265 * @start: resource start address
266 * @size: resource size
267 */
268 void __init ep93xx_register_flash(unsigned int width,
269 resource_size_t start, resource_size_t size)
270 {
271 ep93xx_flash_data.width = width;
272
273 ep93xx_flash_resource.start = start;
274 ep93xx_flash_resource.end = start + size - 1;
275
276 platform_device_register(&ep93xx_flash);
277 }
278
279
280 /*************************************************************************
281 * EP93xx ethernet peripheral handling
282 *************************************************************************/
283 static struct ep93xx_eth_data ep93xx_eth_data;
284
285 static struct resource ep93xx_eth_resource[] = {
286 DEFINE_RES_MEM(EP93XX_ETHERNET_PHYS_BASE, 0x10000),
287 DEFINE_RES_IRQ(IRQ_EP93XX_ETHERNET),
288 };
289
290 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
291
292 static struct platform_device ep93xx_eth_device = {
293 .name = "ep93xx-eth",
294 .id = -1,
295 .dev = {
296 .platform_data = &ep93xx_eth_data,
297 .coherent_dma_mask = DMA_BIT_MASK(32),
298 .dma_mask = &ep93xx_eth_dma_mask,
299 },
300 .num_resources = ARRAY_SIZE(ep93xx_eth_resource),
301 .resource = ep93xx_eth_resource,
302 };
303
304 /**
305 * ep93xx_register_eth - Register the built-in ethernet platform device.
306 * @data: platform specific ethernet configuration (__initdata)
307 * @copy_addr: flag indicating that the MAC address should be copied
308 * from the IndAd registers (as programmed by the bootloader)
309 */
310 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
311 {
312 if (copy_addr)
313 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
314
315 ep93xx_eth_data = *data;
316 platform_device_register(&ep93xx_eth_device);
317 }
318
319
320 /*************************************************************************
321 * EP93xx i2c peripheral handling
322 *************************************************************************/
323
324 /* All EP93xx devices use the same two GPIO pins for I2C bit-banging */
325 static struct gpiod_lookup_table ep93xx_i2c_gpiod_table = {
326 .dev_id = "i2c-gpio",
327 .table = {
328 /* Use local offsets on gpiochip/port "G" */
329 GPIO_LOOKUP_IDX("G", 1, NULL, 0,
330 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
331 GPIO_LOOKUP_IDX("G", 0, NULL, 1,
332 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
333 },
334 };
335
336 static struct platform_device ep93xx_i2c_device = {
337 .name = "i2c-gpio",
338 .id = 0,
339 .dev = {
340 .platform_data = NULL,
341 },
342 };
343
344 /**
345 * ep93xx_register_i2c - Register the i2c platform device.
346 * @devices: platform specific i2c bus device information (__initdata)
347 * @num: the number of devices on the i2c bus
348 */
349 void __init ep93xx_register_i2c(struct i2c_board_info *devices, int num)
350 {
351 /*
352 * FIXME: this just sets the two pins as non-opendrain, as no
353 * platforms tries to do that anyway. Flag the applicable lines
354 * as open drain in the GPIO_LOOKUP above and the driver or
355 * gpiolib will handle open drain/open drain emulation as need
356 * be. Right now i2c-gpio emulates open drain which is not
357 * optimal.
358 */
359 __raw_writel((0 << 1) | (0 << 0),
360 EP93XX_GPIO_EEDRIVE);
361
362 i2c_register_board_info(0, devices, num);
363 gpiod_add_lookup_table(&ep93xx_i2c_gpiod_table);
364 platform_device_register(&ep93xx_i2c_device);
365 }
366
367 /*************************************************************************
368 * EP93xx SPI peripheral handling
369 *************************************************************************/
370 static struct ep93xx_spi_info ep93xx_spi_master_data;
371
372 static struct resource ep93xx_spi_resources[] = {
373 DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18),
374 DEFINE_RES_IRQ(IRQ_EP93XX_SSP),
375 };
376
377 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
378
379 static struct platform_device ep93xx_spi_device = {
380 .name = "ep93xx-spi",
381 .id = 0,
382 .dev = {
383 .platform_data = &ep93xx_spi_master_data,
384 .coherent_dma_mask = DMA_BIT_MASK(32),
385 .dma_mask = &ep93xx_spi_dma_mask,
386 },
387 .num_resources = ARRAY_SIZE(ep93xx_spi_resources),
388 .resource = ep93xx_spi_resources,
389 };
390
391 /**
392 * ep93xx_register_spi() - registers spi platform device
393 * @info: ep93xx board specific spi master info (__initdata)
394 * @devices: SPI devices to register (__initdata)
395 * @num: number of SPI devices to register
396 *
397 * This function registers platform device for the EP93xx SPI controller and
398 * also makes sure that SPI pins are muxed so that I2S is not using those pins.
399 */
400 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
401 struct spi_board_info *devices, int num)
402 {
403 /*
404 * When SPI is used, we need to make sure that I2S is muxed off from
405 * SPI pins.
406 */
407 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
408
409 ep93xx_spi_master_data = *info;
410 spi_register_board_info(devices, num);
411 platform_device_register(&ep93xx_spi_device);
412 }
413
414 /*************************************************************************
415 * EP93xx LEDs
416 *************************************************************************/
417 static const struct gpio_led ep93xx_led_pins[] __initconst = {
418 {
419 .name = "platform:grled",
420 .gpio = EP93XX_GPIO_LINE_GRLED,
421 }, {
422 .name = "platform:rdled",
423 .gpio = EP93XX_GPIO_LINE_RDLED,
424 },
425 };
426
427 static const struct gpio_led_platform_data ep93xx_led_data __initconst = {
428 .num_leds = ARRAY_SIZE(ep93xx_led_pins),
429 .leds = ep93xx_led_pins,
430 };
431
432 /*************************************************************************
433 * EP93xx pwm peripheral handling
434 *************************************************************************/
435 static struct resource ep93xx_pwm0_resource[] = {
436 DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10),
437 };
438
439 static struct platform_device ep93xx_pwm0_device = {
440 .name = "ep93xx-pwm",
441 .id = 0,
442 .num_resources = ARRAY_SIZE(ep93xx_pwm0_resource),
443 .resource = ep93xx_pwm0_resource,
444 };
445
446 static struct resource ep93xx_pwm1_resource[] = {
447 DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10),
448 };
449
450 static struct platform_device ep93xx_pwm1_device = {
451 .name = "ep93xx-pwm",
452 .id = 1,
453 .num_resources = ARRAY_SIZE(ep93xx_pwm1_resource),
454 .resource = ep93xx_pwm1_resource,
455 };
456
457 void __init ep93xx_register_pwm(int pwm0, int pwm1)
458 {
459 if (pwm0)
460 platform_device_register(&ep93xx_pwm0_device);
461
462 /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
463 if (pwm1)
464 platform_device_register(&ep93xx_pwm1_device);
465 }
466
467 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
468 {
469 int err;
470
471 if (pdev->id == 0) {
472 err = 0;
473 } else if (pdev->id == 1) {
474 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
475 dev_name(&pdev->dev));
476 if (err)
477 return err;
478 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
479 if (err)
480 goto fail;
481
482 /* PWM 1 output on EGPIO[14] */
483 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
484 } else {
485 err = -ENODEV;
486 }
487
488 return err;
489
490 fail:
491 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
492 return err;
493 }
494 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
495
496 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
497 {
498 if (pdev->id == 1) {
499 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
500 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
501
502 /* EGPIO[14] used for GPIO */
503 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
504 }
505 }
506 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
507
508
509 /*************************************************************************
510 * EP93xx video peripheral handling
511 *************************************************************************/
512 static struct ep93xxfb_mach_info ep93xxfb_data;
513
514 static struct resource ep93xx_fb_resource[] = {
515 DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800),
516 };
517
518 static struct platform_device ep93xx_fb_device = {
519 .name = "ep93xx-fb",
520 .id = -1,
521 .dev = {
522 .platform_data = &ep93xxfb_data,
523 .coherent_dma_mask = DMA_BIT_MASK(32),
524 .dma_mask = &ep93xx_fb_device.dev.coherent_dma_mask,
525 },
526 .num_resources = ARRAY_SIZE(ep93xx_fb_resource),
527 .resource = ep93xx_fb_resource,
528 };
529
530 /* The backlight use a single register in the framebuffer's register space */
531 #define EP93XX_RASTER_REG_BRIGHTNESS 0x20
532
533 static struct resource ep93xx_bl_resources[] = {
534 DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
535 EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
536 };
537
538 static struct platform_device ep93xx_bl_device = {
539 .name = "ep93xx-bl",
540 .id = -1,
541 .num_resources = ARRAY_SIZE(ep93xx_bl_resources),
542 .resource = ep93xx_bl_resources,
543 };
544
545 /**
546 * ep93xx_register_fb - Register the framebuffer platform device.
547 * @data: platform specific framebuffer configuration (__initdata)
548 */
549 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
550 {
551 ep93xxfb_data = *data;
552 platform_device_register(&ep93xx_fb_device);
553 platform_device_register(&ep93xx_bl_device);
554 }
555
556
557 /*************************************************************************
558 * EP93xx matrix keypad peripheral handling
559 *************************************************************************/
560 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
561
562 static struct resource ep93xx_keypad_resource[] = {
563 DEFINE_RES_MEM(EP93XX_KEY_MATRIX_PHYS_BASE, 0x0c),
564 DEFINE_RES_IRQ(IRQ_EP93XX_KEY),
565 };
566
567 static struct platform_device ep93xx_keypad_device = {
568 .name = "ep93xx-keypad",
569 .id = -1,
570 .dev = {
571 .platform_data = &ep93xx_keypad_data,
572 },
573 .num_resources = ARRAY_SIZE(ep93xx_keypad_resource),
574 .resource = ep93xx_keypad_resource,
575 };
576
577 /**
578 * ep93xx_register_keypad - Register the keypad platform device.
579 * @data: platform specific keypad configuration (__initdata)
580 */
581 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
582 {
583 ep93xx_keypad_data = *data;
584 platform_device_register(&ep93xx_keypad_device);
585 }
586
587 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
588 {
589 int err;
590 int i;
591
592 for (i = 0; i < 8; i++) {
593 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
594 if (err)
595 goto fail_gpio_c;
596 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
597 if (err)
598 goto fail_gpio_d;
599 }
600
601 /* Enable the keypad controller; GPIO ports C and D used for keypad */
602 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
603 EP93XX_SYSCON_DEVCFG_GONK);
604
605 return 0;
606
607 fail_gpio_d:
608 gpio_free(EP93XX_GPIO_LINE_C(i));
609 fail_gpio_c:
610 for (--i; i >= 0; --i) {
611 gpio_free(EP93XX_GPIO_LINE_C(i));
612 gpio_free(EP93XX_GPIO_LINE_D(i));
613 }
614 return err;
615 }
616 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
617
618 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
619 {
620 int i;
621
622 for (i = 0; i < 8; i++) {
623 gpio_free(EP93XX_GPIO_LINE_C(i));
624 gpio_free(EP93XX_GPIO_LINE_D(i));
625 }
626
627 /* Disable the keypad controller; GPIO ports C and D used for GPIO */
628 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
629 EP93XX_SYSCON_DEVCFG_GONK);
630 }
631 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
632
633 /*************************************************************************
634 * EP93xx I2S audio peripheral handling
635 *************************************************************************/
636 static struct resource ep93xx_i2s_resource[] = {
637 DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
638 };
639
640 static struct platform_device ep93xx_i2s_device = {
641 .name = "ep93xx-i2s",
642 .id = -1,
643 .num_resources = ARRAY_SIZE(ep93xx_i2s_resource),
644 .resource = ep93xx_i2s_resource,
645 };
646
647 static struct platform_device ep93xx_pcm_device = {
648 .name = "ep93xx-pcm-audio",
649 .id = -1,
650 };
651
652 void __init ep93xx_register_i2s(void)
653 {
654 platform_device_register(&ep93xx_i2s_device);
655 platform_device_register(&ep93xx_pcm_device);
656 }
657
658 #define EP93XX_SYSCON_DEVCFG_I2S_MASK (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
659 EP93XX_SYSCON_DEVCFG_I2SONAC97)
660
661 #define EP93XX_I2SCLKDIV_MASK (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
662 EP93XX_SYSCON_I2SCLKDIV_SPOL)
663
664 int ep93xx_i2s_acquire(void)
665 {
666 unsigned val;
667
668 ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
669 EP93XX_SYSCON_DEVCFG_I2S_MASK);
670
671 /*
672 * This is potentially racy with the clock api for i2s_mclk, sclk and
673 * lrclk. Since the i2s driver is the only user of those clocks we
674 * rely on it to prevent parallel use of this function and the
675 * clock api for the i2s clocks.
676 */
677 val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
678 val &= ~EP93XX_I2SCLKDIV_MASK;
679 val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
680 ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
681
682 return 0;
683 }
684 EXPORT_SYMBOL(ep93xx_i2s_acquire);
685
686 void ep93xx_i2s_release(void)
687 {
688 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
689 }
690 EXPORT_SYMBOL(ep93xx_i2s_release);
691
692 /*************************************************************************
693 * EP93xx AC97 audio peripheral handling
694 *************************************************************************/
695 static struct resource ep93xx_ac97_resources[] = {
696 DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac),
697 DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR),
698 };
699
700 static struct platform_device ep93xx_ac97_device = {
701 .name = "ep93xx-ac97",
702 .id = -1,
703 .num_resources = ARRAY_SIZE(ep93xx_ac97_resources),
704 .resource = ep93xx_ac97_resources,
705 };
706
707 void __init ep93xx_register_ac97(void)
708 {
709 /*
710 * Make sure that the AC97 pins are not used by I2S.
711 */
712 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
713
714 platform_device_register(&ep93xx_ac97_device);
715 platform_device_register(&ep93xx_pcm_device);
716 }
717
718 /*************************************************************************
719 * EP93xx Watchdog
720 *************************************************************************/
721 static struct resource ep93xx_wdt_resources[] = {
722 DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
723 };
724
725 static struct platform_device ep93xx_wdt_device = {
726 .name = "ep93xx-wdt",
727 .id = -1,
728 .num_resources = ARRAY_SIZE(ep93xx_wdt_resources),
729 .resource = ep93xx_wdt_resources,
730 };
731
732 /*************************************************************************
733 * EP93xx IDE
734 *************************************************************************/
735 static struct resource ep93xx_ide_resources[] = {
736 DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38),
737 DEFINE_RES_IRQ(IRQ_EP93XX_EXT3),
738 };
739
740 static struct platform_device ep93xx_ide_device = {
741 .name = "ep93xx-ide",
742 .id = -1,
743 .dev = {
744 .dma_mask = &ep93xx_ide_device.dev.coherent_dma_mask,
745 .coherent_dma_mask = DMA_BIT_MASK(32),
746 },
747 .num_resources = ARRAY_SIZE(ep93xx_ide_resources),
748 .resource = ep93xx_ide_resources,
749 };
750
751 void __init ep93xx_register_ide(void)
752 {
753 platform_device_register(&ep93xx_ide_device);
754 }
755
756 int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
757 {
758 int err;
759 int i;
760
761 err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
762 if (err)
763 return err;
764 err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
765 if (err)
766 goto fail_egpio15;
767 for (i = 2; i < 8; i++) {
768 err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
769 if (err)
770 goto fail_gpio_e;
771 }
772 for (i = 4; i < 8; i++) {
773 err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
774 if (err)
775 goto fail_gpio_g;
776 }
777 for (i = 0; i < 8; i++) {
778 err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
779 if (err)
780 goto fail_gpio_h;
781 }
782
783 /* GPIO ports E[7:2], G[7:4] and H used by IDE */
784 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
785 EP93XX_SYSCON_DEVCFG_GONIDE |
786 EP93XX_SYSCON_DEVCFG_HONIDE);
787 return 0;
788
789 fail_gpio_h:
790 for (--i; i >= 0; --i)
791 gpio_free(EP93XX_GPIO_LINE_H(i));
792 i = 8;
793 fail_gpio_g:
794 for (--i; i >= 4; --i)
795 gpio_free(EP93XX_GPIO_LINE_G(i));
796 i = 8;
797 fail_gpio_e:
798 for (--i; i >= 2; --i)
799 gpio_free(EP93XX_GPIO_LINE_E(i));
800 gpio_free(EP93XX_GPIO_LINE_EGPIO15);
801 fail_egpio15:
802 gpio_free(EP93XX_GPIO_LINE_EGPIO2);
803 return err;
804 }
805 EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
806
807 void ep93xx_ide_release_gpio(struct platform_device *pdev)
808 {
809 int i;
810
811 for (i = 2; i < 8; i++)
812 gpio_free(EP93XX_GPIO_LINE_E(i));
813 for (i = 4; i < 8; i++)
814 gpio_free(EP93XX_GPIO_LINE_G(i));
815 for (i = 0; i < 8; i++)
816 gpio_free(EP93XX_GPIO_LINE_H(i));
817 gpio_free(EP93XX_GPIO_LINE_EGPIO15);
818 gpio_free(EP93XX_GPIO_LINE_EGPIO2);
819
820
821 /* GPIO ports E[7:2], G[7:4] and H used by GPIO */
822 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
823 EP93XX_SYSCON_DEVCFG_GONIDE |
824 EP93XX_SYSCON_DEVCFG_HONIDE);
825 }
826 EXPORT_SYMBOL(ep93xx_ide_release_gpio);
827
828 /*************************************************************************
829 * EP93xx ADC
830 *************************************************************************/
831 static struct resource ep93xx_adc_resources[] = {
832 DEFINE_RES_MEM(EP93XX_ADC_PHYS_BASE, 0x28),
833 DEFINE_RES_IRQ(IRQ_EP93XX_TOUCH),
834 };
835
836 static struct platform_device ep93xx_adc_device = {
837 .name = "ep93xx-adc",
838 .id = -1,
839 .num_resources = ARRAY_SIZE(ep93xx_adc_resources),
840 .resource = ep93xx_adc_resources,
841 };
842
843 void __init ep93xx_register_adc(void)
844 {
845 /* Power up ADC, deactivate Touch Screen Controller */
846 ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_TIN,
847 EP93XX_SYSCON_DEVCFG_ADCPD);
848
849 platform_device_register(&ep93xx_adc_device);
850 }
851
852 /*************************************************************************
853 * EP93xx Security peripheral
854 *************************************************************************/
855
856 /*
857 * The Maverick Key is 256 bits of micro fuses blown at the factory during
858 * manufacturing to uniquely identify a part.
859 *
860 * See: http://arm.cirrus.com/forum/viewtopic.php?t=486&highlight=maverick+key
861 */
862 #define EP93XX_SECURITY_REG(x) (EP93XX_SECURITY_BASE + (x))
863 #define EP93XX_SECURITY_SECFLG EP93XX_SECURITY_REG(0x2400)
864 #define EP93XX_SECURITY_FUSEFLG EP93XX_SECURITY_REG(0x2410)
865 #define EP93XX_SECURITY_UNIQID EP93XX_SECURITY_REG(0x2440)
866 #define EP93XX_SECURITY_UNIQCHK EP93XX_SECURITY_REG(0x2450)
867 #define EP93XX_SECURITY_UNIQVAL EP93XX_SECURITY_REG(0x2460)
868 #define EP93XX_SECURITY_SECID1 EP93XX_SECURITY_REG(0x2500)
869 #define EP93XX_SECURITY_SECID2 EP93XX_SECURITY_REG(0x2504)
870 #define EP93XX_SECURITY_SECCHK1 EP93XX_SECURITY_REG(0x2520)
871 #define EP93XX_SECURITY_SECCHK2 EP93XX_SECURITY_REG(0x2524)
872 #define EP93XX_SECURITY_UNIQID2 EP93XX_SECURITY_REG(0x2700)
873 #define EP93XX_SECURITY_UNIQID3 EP93XX_SECURITY_REG(0x2704)
874 #define EP93XX_SECURITY_UNIQID4 EP93XX_SECURITY_REG(0x2708)
875 #define EP93XX_SECURITY_UNIQID5 EP93XX_SECURITY_REG(0x270c)
876
877 static char ep93xx_soc_id[33];
878
879 static const char __init *ep93xx_get_soc_id(void)
880 {
881 unsigned int id, id2, id3, id4, id5;
882
883 if (__raw_readl(EP93XX_SECURITY_UNIQVAL) != 1)
884 return "bad Hamming code";
885
886 id = __raw_readl(EP93XX_SECURITY_UNIQID);
887 id2 = __raw_readl(EP93XX_SECURITY_UNIQID2);
888 id3 = __raw_readl(EP93XX_SECURITY_UNIQID3);
889 id4 = __raw_readl(EP93XX_SECURITY_UNIQID4);
890 id5 = __raw_readl(EP93XX_SECURITY_UNIQID5);
891
892 if (id != id2)
893 return "invalid";
894
895 /* Toss the unique ID into the entropy pool */
896 add_device_randomness(&id2, 4);
897 add_device_randomness(&id3, 4);
898 add_device_randomness(&id4, 4);
899 add_device_randomness(&id5, 4);
900
901 snprintf(ep93xx_soc_id, sizeof(ep93xx_soc_id),
902 "%08x%08x%08x%08x", id2, id3, id4, id5);
903
904 return ep93xx_soc_id;
905 }
906
907 static const char __init *ep93xx_get_soc_rev(void)
908 {
909 int rev = ep93xx_chip_revision();
910
911 switch (rev) {
912 case EP93XX_CHIP_REV_D0:
913 return "D0";
914 case EP93XX_CHIP_REV_D1:
915 return "D1";
916 case EP93XX_CHIP_REV_E0:
917 return "E0";
918 case EP93XX_CHIP_REV_E1:
919 return "E1";
920 case EP93XX_CHIP_REV_E2:
921 return "E2";
922 default:
923 return "unknown";
924 }
925 }
926
927 static const char __init *ep93xx_get_machine_name(void)
928 {
929 return kasprintf(GFP_KERNEL,"%s", machine_desc->name);
930 }
931
932 static struct device __init *ep93xx_init_soc(void)
933 {
934 struct soc_device_attribute *soc_dev_attr;
935 struct soc_device *soc_dev;
936
937 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
938 if (!soc_dev_attr)
939 return NULL;
940
941 soc_dev_attr->machine = ep93xx_get_machine_name();
942 soc_dev_attr->family = "Cirrus Logic EP93xx";
943 soc_dev_attr->revision = ep93xx_get_soc_rev();
944 soc_dev_attr->soc_id = ep93xx_get_soc_id();
945
946 soc_dev = soc_device_register(soc_dev_attr);
947 if (IS_ERR(soc_dev)) {
948 kfree(soc_dev_attr->machine);
949 kfree(soc_dev_attr);
950 return NULL;
951 }
952
953 return soc_device_to_device(soc_dev);
954 }
955
956 struct device __init *ep93xx_init_devices(void)
957 {
958 struct device *parent;
959
960 /* Disallow access to MaverickCrunch initially */
961 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
962
963 /* Default all ports to GPIO */
964 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
965 EP93XX_SYSCON_DEVCFG_GONK |
966 EP93XX_SYSCON_DEVCFG_EONIDE |
967 EP93XX_SYSCON_DEVCFG_GONIDE |
968 EP93XX_SYSCON_DEVCFG_HONIDE);
969
970 parent = ep93xx_init_soc();
971
972 /* Get the GPIO working early, other devices need it */
973 platform_device_register(&ep93xx_gpio_device);
974
975 amba_device_register(&uart1_device, &iomem_resource);
976 amba_device_register(&uart2_device, &iomem_resource);
977 amba_device_register(&uart3_device, &iomem_resource);
978
979 platform_device_register(&ep93xx_rtc_device);
980 platform_device_register(&ep93xx_ohci_device);
981 platform_device_register(&ep93xx_wdt_device);
982
983 gpio_led_register_device(-1, &ep93xx_led_data);
984
985 return parent;
986 }
987
988 void ep93xx_restart(enum reboot_mode mode, const char *cmd)
989 {
990 /*
991 * Set then clear the SWRST bit to initiate a software reset
992 */
993 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
994 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
995
996 while (1)
997 ;
998 }
999
1000 void __init ep93xx_init_late(void)
1001 {
1002 crunch_init();
1003 }
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