48d6a9e01dc8aef472645bcf28906508e73ca2e8
[muen/linux.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         DEFINE_RES_IRQ(IRQ_EP93XX_SAI),
639 };
640
641 static struct platform_device ep93xx_i2s_device = {
642         .name           = "ep93xx-i2s",
643         .id             = -1,
644         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
645         .resource       = ep93xx_i2s_resource,
646 };
647
648 static struct platform_device ep93xx_pcm_device = {
649         .name           = "ep93xx-pcm-audio",
650         .id             = -1,
651 };
652
653 void __init ep93xx_register_i2s(void)
654 {
655         platform_device_register(&ep93xx_i2s_device);
656         platform_device_register(&ep93xx_pcm_device);
657 }
658
659 #define EP93XX_SYSCON_DEVCFG_I2S_MASK   (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
660                                          EP93XX_SYSCON_DEVCFG_I2SONAC97)
661
662 #define EP93XX_I2SCLKDIV_MASK           (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
663                                          EP93XX_SYSCON_I2SCLKDIV_SPOL)
664
665 int ep93xx_i2s_acquire(void)
666 {
667         unsigned val;
668
669         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
670                         EP93XX_SYSCON_DEVCFG_I2S_MASK);
671
672         /*
673          * This is potentially racy with the clock api for i2s_mclk, sclk and 
674          * lrclk. Since the i2s driver is the only user of those clocks we
675          * rely on it to prevent parallel use of this function and the 
676          * clock api for the i2s clocks.
677          */
678         val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
679         val &= ~EP93XX_I2SCLKDIV_MASK;
680         val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
681         ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
682
683         return 0;
684 }
685 EXPORT_SYMBOL(ep93xx_i2s_acquire);
686
687 void ep93xx_i2s_release(void)
688 {
689         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
690 }
691 EXPORT_SYMBOL(ep93xx_i2s_release);
692
693 /*************************************************************************
694  * EP93xx AC97 audio peripheral handling
695  *************************************************************************/
696 static struct resource ep93xx_ac97_resources[] = {
697         DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac),
698         DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR),
699 };
700
701 static struct platform_device ep93xx_ac97_device = {
702         .name           = "ep93xx-ac97",
703         .id             = -1,
704         .num_resources  = ARRAY_SIZE(ep93xx_ac97_resources),
705         .resource       = ep93xx_ac97_resources,
706 };
707
708 void __init ep93xx_register_ac97(void)
709 {
710         /*
711          * Make sure that the AC97 pins are not used by I2S.
712          */
713         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
714
715         platform_device_register(&ep93xx_ac97_device);
716         platform_device_register(&ep93xx_pcm_device);
717 }
718
719 /*************************************************************************
720  * EP93xx Watchdog
721  *************************************************************************/
722 static struct resource ep93xx_wdt_resources[] = {
723         DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
724 };
725
726 static struct platform_device ep93xx_wdt_device = {
727         .name           = "ep93xx-wdt",
728         .id             = -1,
729         .num_resources  = ARRAY_SIZE(ep93xx_wdt_resources),
730         .resource       = ep93xx_wdt_resources,
731 };
732
733 /*************************************************************************
734  * EP93xx IDE
735  *************************************************************************/
736 static struct resource ep93xx_ide_resources[] = {
737         DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38),
738         DEFINE_RES_IRQ(IRQ_EP93XX_EXT3),
739 };
740
741 static struct platform_device ep93xx_ide_device = {
742         .name           = "ep93xx-ide",
743         .id             = -1,
744         .dev            = {
745                 .dma_mask               = &ep93xx_ide_device.dev.coherent_dma_mask,
746                 .coherent_dma_mask      = DMA_BIT_MASK(32),
747         },
748         .num_resources  = ARRAY_SIZE(ep93xx_ide_resources),
749         .resource       = ep93xx_ide_resources,
750 };
751
752 void __init ep93xx_register_ide(void)
753 {
754         platform_device_register(&ep93xx_ide_device);
755 }
756
757 int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
758 {
759         int err;
760         int i;
761
762         err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
763         if (err)
764                 return err;
765         err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
766         if (err)
767                 goto fail_egpio15;
768         for (i = 2; i < 8; i++) {
769                 err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
770                 if (err)
771                         goto fail_gpio_e;
772         }
773         for (i = 4; i < 8; i++) {
774                 err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
775                 if (err)
776                         goto fail_gpio_g;
777         }
778         for (i = 0; i < 8; i++) {
779                 err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
780                 if (err)
781                         goto fail_gpio_h;
782         }
783
784         /* GPIO ports E[7:2], G[7:4] and H used by IDE */
785         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
786                                  EP93XX_SYSCON_DEVCFG_GONIDE |
787                                  EP93XX_SYSCON_DEVCFG_HONIDE);
788         return 0;
789
790 fail_gpio_h:
791         for (--i; i >= 0; --i)
792                 gpio_free(EP93XX_GPIO_LINE_H(i));
793         i = 8;
794 fail_gpio_g:
795         for (--i; i >= 4; --i)
796                 gpio_free(EP93XX_GPIO_LINE_G(i));
797         i = 8;
798 fail_gpio_e:
799         for (--i; i >= 2; --i)
800                 gpio_free(EP93XX_GPIO_LINE_E(i));
801         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
802 fail_egpio15:
803         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
804         return err;
805 }
806 EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
807
808 void ep93xx_ide_release_gpio(struct platform_device *pdev)
809 {
810         int i;
811
812         for (i = 2; i < 8; i++)
813                 gpio_free(EP93XX_GPIO_LINE_E(i));
814         for (i = 4; i < 8; i++)
815                 gpio_free(EP93XX_GPIO_LINE_G(i));
816         for (i = 0; i < 8; i++)
817                 gpio_free(EP93XX_GPIO_LINE_H(i));
818         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
819         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
820
821
822         /* GPIO ports E[7:2], G[7:4] and H used by GPIO */
823         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
824                                EP93XX_SYSCON_DEVCFG_GONIDE |
825                                EP93XX_SYSCON_DEVCFG_HONIDE);
826 }
827 EXPORT_SYMBOL(ep93xx_ide_release_gpio);
828
829 /*************************************************************************
830  * EP93xx ADC
831  *************************************************************************/
832 static struct resource ep93xx_adc_resources[] = {
833         DEFINE_RES_MEM(EP93XX_ADC_PHYS_BASE, 0x28),
834         DEFINE_RES_IRQ(IRQ_EP93XX_TOUCH),
835 };
836
837 static struct platform_device ep93xx_adc_device = {
838         .name           = "ep93xx-adc",
839         .id             = -1,
840         .num_resources  = ARRAY_SIZE(ep93xx_adc_resources),
841         .resource       = ep93xx_adc_resources,
842 };
843
844 void __init ep93xx_register_adc(void)
845 {
846         /* Power up ADC, deactivate Touch Screen Controller */
847         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_TIN,
848                                 EP93XX_SYSCON_DEVCFG_ADCPD);
849
850         platform_device_register(&ep93xx_adc_device);
851 }
852
853 /*************************************************************************
854  * EP93xx Security peripheral
855  *************************************************************************/
856
857 /*
858  * The Maverick Key is 256 bits of micro fuses blown at the factory during
859  * manufacturing to uniquely identify a part.
860  *
861  * See: http://arm.cirrus.com/forum/viewtopic.php?t=486&highlight=maverick+key
862  */
863 #define EP93XX_SECURITY_REG(x)          (EP93XX_SECURITY_BASE + (x))
864 #define EP93XX_SECURITY_SECFLG          EP93XX_SECURITY_REG(0x2400)
865 #define EP93XX_SECURITY_FUSEFLG         EP93XX_SECURITY_REG(0x2410)
866 #define EP93XX_SECURITY_UNIQID          EP93XX_SECURITY_REG(0x2440)
867 #define EP93XX_SECURITY_UNIQCHK         EP93XX_SECURITY_REG(0x2450)
868 #define EP93XX_SECURITY_UNIQVAL         EP93XX_SECURITY_REG(0x2460)
869 #define EP93XX_SECURITY_SECID1          EP93XX_SECURITY_REG(0x2500)
870 #define EP93XX_SECURITY_SECID2          EP93XX_SECURITY_REG(0x2504)
871 #define EP93XX_SECURITY_SECCHK1         EP93XX_SECURITY_REG(0x2520)
872 #define EP93XX_SECURITY_SECCHK2         EP93XX_SECURITY_REG(0x2524)
873 #define EP93XX_SECURITY_UNIQID2         EP93XX_SECURITY_REG(0x2700)
874 #define EP93XX_SECURITY_UNIQID3         EP93XX_SECURITY_REG(0x2704)
875 #define EP93XX_SECURITY_UNIQID4         EP93XX_SECURITY_REG(0x2708)
876 #define EP93XX_SECURITY_UNIQID5         EP93XX_SECURITY_REG(0x270c)
877
878 static char ep93xx_soc_id[33];
879
880 static const char __init *ep93xx_get_soc_id(void)
881 {
882         unsigned int id, id2, id3, id4, id5;
883
884         if (__raw_readl(EP93XX_SECURITY_UNIQVAL) != 1)
885                 return "bad Hamming code";
886
887         id = __raw_readl(EP93XX_SECURITY_UNIQID);
888         id2 = __raw_readl(EP93XX_SECURITY_UNIQID2);
889         id3 = __raw_readl(EP93XX_SECURITY_UNIQID3);
890         id4 = __raw_readl(EP93XX_SECURITY_UNIQID4);
891         id5 = __raw_readl(EP93XX_SECURITY_UNIQID5);
892
893         if (id != id2)
894                 return "invalid";
895
896         /* Toss the unique ID into the entropy pool */
897         add_device_randomness(&id2, 4);
898         add_device_randomness(&id3, 4);
899         add_device_randomness(&id4, 4);
900         add_device_randomness(&id5, 4);
901
902         snprintf(ep93xx_soc_id, sizeof(ep93xx_soc_id),
903                  "%08x%08x%08x%08x", id2, id3, id4, id5);
904
905         return ep93xx_soc_id;
906 }
907
908 static const char __init *ep93xx_get_soc_rev(void)
909 {
910         int rev = ep93xx_chip_revision();
911
912         switch (rev) {
913         case EP93XX_CHIP_REV_D0:
914                 return "D0";
915         case EP93XX_CHIP_REV_D1:
916                 return "D1";
917         case EP93XX_CHIP_REV_E0:
918                 return "E0";
919         case EP93XX_CHIP_REV_E1:
920                 return "E1";
921         case EP93XX_CHIP_REV_E2:
922                 return "E2";
923         default:
924                 return "unknown";
925         }
926 }
927
928 static const char __init *ep93xx_get_machine_name(void)
929 {
930         return kasprintf(GFP_KERNEL,"%s", machine_desc->name);
931 }
932
933 static struct device __init *ep93xx_init_soc(void)
934 {
935         struct soc_device_attribute *soc_dev_attr;
936         struct soc_device *soc_dev;
937
938         soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
939         if (!soc_dev_attr)
940                 return NULL;
941
942         soc_dev_attr->machine = ep93xx_get_machine_name();
943         soc_dev_attr->family = "Cirrus Logic EP93xx";
944         soc_dev_attr->revision = ep93xx_get_soc_rev();
945         soc_dev_attr->soc_id = ep93xx_get_soc_id();
946
947         soc_dev = soc_device_register(soc_dev_attr);
948         if (IS_ERR(soc_dev)) {
949                 kfree(soc_dev_attr->machine);
950                 kfree(soc_dev_attr);
951                 return NULL;
952         }
953
954         return soc_device_to_device(soc_dev);
955 }
956
957 struct device __init *ep93xx_init_devices(void)
958 {
959         struct device *parent;
960
961         /* Disallow access to MaverickCrunch initially */
962         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
963
964         /* Default all ports to GPIO */
965         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
966                                EP93XX_SYSCON_DEVCFG_GONK |
967                                EP93XX_SYSCON_DEVCFG_EONIDE |
968                                EP93XX_SYSCON_DEVCFG_GONIDE |
969                                EP93XX_SYSCON_DEVCFG_HONIDE);
970
971         parent = ep93xx_init_soc();
972
973         /* Get the GPIO working early, other devices need it */
974         platform_device_register(&ep93xx_gpio_device);
975
976         amba_device_register(&uart1_device, &iomem_resource);
977         amba_device_register(&uart2_device, &iomem_resource);
978         amba_device_register(&uart3_device, &iomem_resource);
979
980         platform_device_register(&ep93xx_rtc_device);
981         platform_device_register(&ep93xx_ohci_device);
982         platform_device_register(&ep93xx_wdt_device);
983
984         gpio_led_register_device(-1, &ep93xx_led_data);
985
986         return parent;
987 }
988
989 void ep93xx_restart(enum reboot_mode mode, const char *cmd)
990 {
991         /*
992          * Set then clear the SWRST bit to initiate a software reset
993          */
994         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
995         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
996
997         while (1)
998                 ;
999 }
1000
1001 void __init ep93xx_init_late(void)
1002 {
1003         crunch_init();
1004 }