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Merge branches 'irq-urgent-for-linus' and 'smp-hotplug-for-linus' of git://git.kernel...
[deliverable/linux.git] / arch / arm / mach-ep93xx / core.c
CommitLineData
e7736d47
LB		 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>
3c9a071d 6 * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
e7736d47
LB		 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
64d6882d
HS		 17#define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt
18
e7736d47
LB		 19#include <linux/kernel.h>
20#include <linux/init.h>
583ddafe 21#include <linux/platform_device.h>
e7736d47 22#include <linux/interrupt.h>
63890a0e 23#include <linux/dma-mapping.h>
e7736d47 24#include <linux/timex.h>
6bd4b382 25#include <linux/irq.h>
583ddafe
HS		 26#include <linux/io.h>
27#include <linux/gpio.h>
3aa7a9a3 28#include <linux/leds.h>
aee85fe8 29#include <linux/termios.h>
e7736d47 30#include <linux/amba/bus.h>
aee85fe8 31#include <linux/amba/serial.h>
16bcf78f 32#include <linux/mtd/physmap.h>
d52a26a9
HS		 33#include <linux/i2c.h>
34#include <linux/i2c-gpio.h>
4fec9978 35#include <linux/spi/spi.h>
dc28094b 36#include <linux/export.h>
e7736d47 37
a09e64fb 38#include <mach/hardware.h>
c6012189 39#include <mach/fb.h>
12f56c68 40#include <mach/ep93xx_keypad.h>
4fec9978 41#include <mach/ep93xx_spi.h>
bd5f12a2 42#include <mach/gpio-ep93xx.h>
e7736d47
LB		 43
44#include <asm/mach/map.h>
45#include <asm/mach/time.h>
e7736d47
LB		 46
47#include <asm/hardware/vic.h>
48
a05baf33 49#include "soc.h"
e7736d47
LB		 50
51/*************************************************************************
52 * Static I/O mappings that are needed for all EP93xx platforms
53 *************************************************************************/
54static struct map_desc ep93xx_io_desc[] __initdata = {
55 {
56 .virtual = EP93XX_AHB_VIRT_BASE,
57 .pfn = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
58 .length = EP93XX_AHB_SIZE,
59 .type = MT_DEVICE,
60 }, {
61 .virtual = EP93XX_APB_VIRT_BASE,
62 .pfn = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
63 .length = EP93XX_APB_SIZE,
64 .type = MT_DEVICE,
65 },
66};
67
68void __init ep93xx_map_io(void)
69{
70 iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
71}
72
73
74/*************************************************************************
75 * Timer handling for EP93xx
76 *************************************************************************
77 * The ep93xx has four internal timers. Timers 1, 2 (both 16 bit) and
78 * 3 (32 bit) count down at 508 kHz, are self-reloading, and can generate
79 * an interrupt on underflow. Timer 4 (40 bit) counts down at 983.04 kHz,
80 * is free-running, and can't generate interrupts.
81 *
82 * The 508 kHz timers are ideal for use for the timer interrupt, as the
83 * most common values of HZ divide 508 kHz nicely. We pick one of the 16
84 * bit timers (timer 1) since we don't need more than 16 bits of reload
85 * value as long as HZ >= 8.
86 *
87 * The higher clock rate of timer 4 makes it a better choice than the
88 * other timers for use in gettimeoffset(), while the fact that it can't
89 * generate interrupts means we don't have to worry about not being able
90 * to use this timer for something else. We also use timer 4 for keeping
91 * track of lost jiffies.
92 */
1587a373
HS		 93#define EP93XX_TIMER_REG(x) (EP93XX_TIMER_BASE + (x))
94#define EP93XX_TIMER1_LOAD EP93XX_TIMER_REG(0x00)
95#define EP93XX_TIMER1_VALUE EP93XX_TIMER_REG(0x04)
96#define EP93XX_TIMER1_CONTROL EP93XX_TIMER_REG(0x08)
97#define EP93XX_TIMER123_CONTROL_ENABLE (1 << 7)
98#define EP93XX_TIMER123_CONTROL_MODE (1 << 6)
99#define EP93XX_TIMER123_CONTROL_CLKSEL (1 << 3)
100#define EP93XX_TIMER1_CLEAR EP93XX_TIMER_REG(0x0c)
101#define EP93XX_TIMER2_LOAD EP93XX_TIMER_REG(0x20)
102#define EP93XX_TIMER2_VALUE EP93XX_TIMER_REG(0x24)
103#define EP93XX_TIMER2_CONTROL EP93XX_TIMER_REG(0x28)
104#define EP93XX_TIMER2_CLEAR EP93XX_TIMER_REG(0x2c)
105#define EP93XX_TIMER4_VALUE_LOW EP93XX_TIMER_REG(0x60)
106#define EP93XX_TIMER4_VALUE_HIGH EP93XX_TIMER_REG(0x64)
107#define EP93XX_TIMER4_VALUE_HIGH_ENABLE (1 << 8)
108#define EP93XX_TIMER3_LOAD EP93XX_TIMER_REG(0x80)
109#define EP93XX_TIMER3_VALUE EP93XX_TIMER_REG(0x84)
110#define EP93XX_TIMER3_CONTROL EP93XX_TIMER_REG(0x88)
111#define EP93XX_TIMER3_CLEAR EP93XX_TIMER_REG(0x8c)
112
113#define EP93XX_TIMER123_CLOCK 508469
114#define EP93XX_TIMER4_CLOCK 983040
115
116#define TIMER1_RELOAD ((EP93XX_TIMER123_CLOCK / HZ) - 1)
af1057ab 117#define TIMER4_TICKS_PER_JIFFY DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ)
e7736d47 118
1587a373
HS		 119static unsigned int last_jiffy_time;
120
d5565f76 121static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
e7736d47 122{
1587a373 123 /* Writing any value clears the timer interrupt */
e7736d47 124 __raw_writel(1, EP93XX_TIMER1_CLEAR);
1587a373
HS		 125
126 /* Recover lost jiffies */
f869afab
LB		 127 while ((signed long)
128 (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time)
e7736d47
LB		 129 >= TIMER4_TICKS_PER_JIFFY) {
130 last_jiffy_time += TIMER4_TICKS_PER_JIFFY;
0cd61b68 131 timer_tick();
e7736d47
LB		 132 }
133
e7736d47
LB		 134 return IRQ_HANDLED;
135}
136
137static struct irqaction ep93xx_timer_irq = {
138 .name = "ep93xx timer",
b30fabad 139 .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
e7736d47
LB		 140 .handler = ep93xx_timer_interrupt,
141};
142
143static void __init ep93xx_timer_init(void)
144{
1587a373
HS		 145 u32 tmode = EP93XX_TIMER123_CONTROL_MODE |
146 EP93XX_TIMER123_CONTROL_CLKSEL;
147
e7736d47 148 /* Enable periodic HZ timer. */
1587a373
HS		 149 __raw_writel(tmode, EP93XX_TIMER1_CONTROL);
150 __raw_writel(TIMER1_RELOAD, EP93XX_TIMER1_LOAD);
151 __raw_writel(tmode | EP93XX_TIMER123_CONTROL_ENABLE,
152 EP93XX_TIMER1_CONTROL);
e7736d47
LB		 153
154 /* Enable lost jiffy timer. */
1587a373
HS		 155 __raw_writel(EP93XX_TIMER4_VALUE_HIGH_ENABLE,
156 EP93XX_TIMER4_VALUE_HIGH);
e7736d47
LB		 157
158 setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq);
159}
160
161static unsigned long ep93xx_gettimeoffset(void)
162{
163 int offset;
164
165 offset = __raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time;
166
167 /* Calculate (1000000 / 983040) * offset. */
168 return offset + (53 * offset / 3072);
169}
170
171struct sys_timer ep93xx_timer = {
172 .init = ep93xx_timer_init,
173 .offset = ep93xx_gettimeoffset,
174};
175
176
177/*************************************************************************
178 * EP93xx IRQ handling
179 *************************************************************************/
180void __init ep93xx_init_irq(void)
181{
5396730b
HS		 182 vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0);
183 vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0);
e7736d47
LB		 184}
185
186
02239f0a
HS		 187/*************************************************************************
188 * EP93xx System Controller Software Locked register handling
189 *************************************************************************/
190
191/*
192 * syscon_swlock prevents anything else from writing to the syscon
193 * block while a software locked register is being written.
194 */
195static DEFINE_SPINLOCK(syscon_swlock);
196
fbeeea53 197void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
02239f0a
HS		 198{
199 unsigned long flags;
200
201 spin_lock_irqsave(&syscon_swlock, flags);
202
203 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
204 __raw_writel(val, reg);
205
206 spin_unlock_irqrestore(&syscon_swlock, flags);
207}
02239f0a
HS		 208
209void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
210{
211 unsigned long flags;
212 unsigned int val;
213
214 spin_lock_irqsave(&syscon_swlock, flags);
215
216 val = __raw_readl(EP93XX_SYSCON_DEVCFG);
02239f0a 217 val &= ~clear_bits;
a0fb007b 218 val |= set_bits;
02239f0a
HS		 219 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
220 __raw_writel(val, EP93XX_SYSCON_DEVCFG);
221
222 spin_unlock_irqrestore(&syscon_swlock, flags);
223}
02239f0a 224
99e6a23a
MW		 225/**
226 * ep93xx_chip_revision() - returns the EP93xx chip revision
227 *
228 * See <mach/platform.h> for more information.
229 */
230unsigned int ep93xx_chip_revision(void)
231{
232 unsigned int v;
233
234 v = __raw_readl(EP93XX_SYSCON_SYSCFG);
235 v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
236 v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
237 return v;
238}
02239f0a 239
1e4c8842
HS		 240/*************************************************************************
241 * EP93xx GPIO
242 *************************************************************************/
243static struct resource ep93xx_gpio_resource[] = {
ede55aaa 244 DEFINE_RES_MEM(EP93XX_GPIO_PHYS_BASE, 0xcc),
1e4c8842
HS		 245};
246
247static struct platform_device ep93xx_gpio_device = {
248 .name = "gpio-ep93xx",
249 .id = -1,
250 .num_resources = ARRAY_SIZE(ep93xx_gpio_resource),
251 .resource = ep93xx_gpio_resource,
252};
253
e7736d47
LB		 254/*************************************************************************
255 * EP93xx peripheral handling
256 *************************************************************************/
aee85fe8
LB		 257#define EP93XX_UART_MCR_OFFSET (0x0100)
258
259static void ep93xx_uart_set_mctrl(struct amba_device *dev,
260 void __iomem *base, unsigned int mctrl)
261{
262 unsigned int mcr;
263
264 mcr = 0;
186dcaa4 265 if (mctrl & TIOCM_RTS)
aee85fe8 266 mcr |= 2;
186dcaa4 267 if (mctrl & TIOCM_DTR)
aee85fe8
LB		 268 mcr |= 1;
269
270 __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
271}
272
273static struct amba_pl010_data ep93xx_uart_data = {
274 .set_mctrl = ep93xx_uart_set_mctrl,
275};
276
0b26051b
RK		 277static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE,
278 { IRQ_EP93XX_UART1 }, &ep93xx_uart_data);
aee85fe8 279
0b26051b
RK		 280static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE,
281 { IRQ_EP93XX_UART2 }, &ep93xx_uart_data);
aee85fe8 282
0b26051b
RK		 283static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE,
284 { IRQ_EP93XX_UART3 }, &ep93xx_uart_data);
41658132 285
38f7b009 286static struct resource ep93xx_rtc_resource[] = {
ede55aaa 287 DEFINE_RES_MEM(EP93XX_RTC_PHYS_BASE, 0x10c),
38f7b009
HS		 288};
289
41658132 290static struct platform_device ep93xx_rtc_device = {
38f7b009
HS		 291 .name = "ep93xx-rtc",
292 .id = -1,
293 .num_resources = ARRAY_SIZE(ep93xx_rtc_resource),
294 .resource = ep93xx_rtc_resource,
41658132
LB		 295};
296
297
1f64eb37 298static struct resource ep93xx_ohci_resources[] = {
ede55aaa
HS		 299 DEFINE_RES_MEM(EP93XX_USB_PHYS_BASE, 0x1000),
300 DEFINE_RES_IRQ(IRQ_EP93XX_USB),
1f64eb37
LB		 301};
302
63890a0e 303
1f64eb37
LB		 304static struct platform_device ep93xx_ohci_device = {
305 .name = "ep93xx-ohci",
306 .id = -1,
307 .dev = {
63890a0e
MK		 308 .dma_mask = &ep93xx_ohci_device.dev.coherent_dma_mask,
309 .coherent_dma_mask = DMA_BIT_MASK(32),
1f64eb37
LB		 310 },
311 .num_resources = ARRAY_SIZE(ep93xx_ohci_resources),
312 .resource = ep93xx_ohci_resources,
313};
314
b370e082 315
16bcf78f
HS		 316/*************************************************************************
317 * EP93xx physmap'ed flash
318 *************************************************************************/
319static struct physmap_flash_data ep93xx_flash_data;
320
321static struct resource ep93xx_flash_resource = {
322 .flags = IORESOURCE_MEM,
323};
324
325static struct platform_device ep93xx_flash = {
326 .name = "physmap-flash",
327 .id = 0,
328 .dev = {
329 .platform_data = &ep93xx_flash_data,
330 },
331 .num_resources = 1,
332 .resource = &ep93xx_flash_resource,
333};
334
335/**
336 * ep93xx_register_flash() - Register the external flash device.
337 * @width: bank width in octets
338 * @start: resource start address
339 * @size: resource size
340 */
341void __init ep93xx_register_flash(unsigned int width,
342 resource_size_t start, resource_size_t size)
343{
344 ep93xx_flash_data.width = width;
345
346 ep93xx_flash_resource.start = start;
347 ep93xx_flash_resource.end = start + size - 1;
348
349 platform_device_register(&ep93xx_flash);
350}
351
352
b370e082
HS		 353/*************************************************************************
354 * EP93xx ethernet peripheral handling
355 *************************************************************************/
a0a08fdc
HS		 356static struct ep93xx_eth_data ep93xx_eth_data;
357
358static struct resource ep93xx_eth_resource[] = {
ede55aaa 359 DEFINE_RES_MEM(EP93XX_ETHERNET_PHYS_BASE, 0x10000),
011b2e84 360 DEFINE_RES_IRQ(IRQ_EP93XX_ETHERNET),
a0a08fdc
HS		 361};
362
fa70cf47
MW		 363static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
364
a0a08fdc
HS		 365static struct platform_device ep93xx_eth_device = {
366 .name = "ep93xx-eth",
367 .id = -1,
368 .dev = {
fa70cf47
MW		 369 .platform_data = &ep93xx_eth_data,
370 .coherent_dma_mask = DMA_BIT_MASK(32),
371 .dma_mask = &ep93xx_eth_dma_mask,
a0a08fdc
HS		 372 },
373 .num_resources = ARRAY_SIZE(ep93xx_eth_resource),
374 .resource = ep93xx_eth_resource,
375};
376
b370e082
HS		 377/**
378 * ep93xx_register_eth - Register the built-in ethernet platform device.
379 * @data: platform specific ethernet configuration (__initdata)
380 * @copy_addr: flag indicating that the MAC address should be copied
381 * from the IndAd registers (as programmed by the bootloader)
382 */
a0a08fdc
HS		 383void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
384{
5b1c3c85
HS		 385 if (copy_addr)
386 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
a0a08fdc
HS		 387
388 ep93xx_eth_data = *data;
389 platform_device_register(&ep93xx_eth_device);
390}
391
6531a991
HS		 392
393/*************************************************************************
394 * EP93xx i2c peripheral handling
395 *************************************************************************/
396static struct i2c_gpio_platform_data ep93xx_i2c_data;
d52a26a9
HS		 397
398static struct platform_device ep93xx_i2c_device = {
b370e082
HS		 399 .name = "i2c-gpio",
400 .id = 0,
401 .dev = {
402 .platform_data = &ep93xx_i2c_data,
403 },
d52a26a9
HS		 404};
405
b370e082
HS		 406/**
407 * ep93xx_register_i2c - Register the i2c platform device.
408 * @data: platform specific i2c-gpio configuration (__initdata)
409 * @devices: platform specific i2c bus device information (__initdata)
410 * @num: the number of devices on the i2c bus
411 */
6531a991
HS		 412void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
413 struct i2c_board_info *devices, int num)
d52a26a9 414{
6531a991
HS		 415 /*
416 * Set the EEPROM interface pin drive type control.
417 * Defines the driver type for the EECLK and EEDAT pins as either
418 * open drain, which will require an external pull-up, or a normal
419 * CMOS driver.
420 */
421 if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
64d6882d 422 pr_warning("sda != EEDAT, open drain has no effect\n");
6531a991 423 if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
64d6882d 424 pr_warning("scl != EECLK, open drain has no effect\n");
6531a991
HS		 425
426 __raw_writel((data->sda_is_open_drain << 1) |
427 (data->scl_is_open_drain << 0),
428 EP93XX_GPIO_EEDRIVE);
429
430 ep93xx_i2c_data = *data;
d52a26a9
HS		 431 i2c_register_board_info(0, devices, num);
432 platform_device_register(&ep93xx_i2c_device);
433}
434
4fec9978
MW		 435/*************************************************************************
436 * EP93xx SPI peripheral handling
437 *************************************************************************/
438static struct ep93xx_spi_info ep93xx_spi_master_data;
439
440static struct resource ep93xx_spi_resources[] = {
ede55aaa
HS		 441 DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18),
442 DEFINE_RES_IRQ(IRQ_EP93XX_SSP),
4fec9978
MW		 443};
444
626a96db
MW		 445static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
446
4fec9978
MW		 447static struct platform_device ep93xx_spi_device = {
448 .name = "ep93xx-spi",
449 .id = 0,
450 .dev = {
626a96db
MW		 451 .platform_data = &ep93xx_spi_master_data,
452 .coherent_dma_mask = DMA_BIT_MASK(32),
453 .dma_mask = &ep93xx_spi_dma_mask,
4fec9978
MW		 454 },
455 .num_resources = ARRAY_SIZE(ep93xx_spi_resources),
456 .resource = ep93xx_spi_resources,
457};
458
459/**
460 * ep93xx_register_spi() - registers spi platform device
461 * @info: ep93xx board specific spi master info (__initdata)
462 * @devices: SPI devices to register (__initdata)
463 * @num: number of SPI devices to register
464 *
465 * This function registers platform device for the EP93xx SPI controller and
466 * also makes sure that SPI pins are muxed so that I2S is not using those pins.
467 */
468void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
469 struct spi_board_info *devices, int num)
470{
471 /*
472 * When SPI is used, we need to make sure that I2S is muxed off from
473 * SPI pins.
474 */
475 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
476
477 ep93xx_spi_master_data = *info;
478 spi_register_board_info(devices, num);
479 platform_device_register(&ep93xx_spi_device);
480}
3aa7a9a3
HS		 481
482/*************************************************************************
483 * EP93xx LEDs
484 *************************************************************************/
a1eacd79 485static const struct gpio_led ep93xx_led_pins[] __initconst = {
3aa7a9a3 486 {
b370e082
HS		 487 .name = "platform:grled",
488 .gpio = EP93XX_GPIO_LINE_GRLED,
3aa7a9a3 489 }, {
b370e082
HS		 490 .name = "platform:rdled",
491 .gpio = EP93XX_GPIO_LINE_RDLED,
3aa7a9a3
HS		 492 },
493};
494
a1eacd79 495static const struct gpio_led_platform_data ep93xx_led_data __initconst = {
3aa7a9a3
HS		 496 .num_leds = ARRAY_SIZE(ep93xx_led_pins),
497 .leds = ep93xx_led_pins,
498};
499
ef12379f
HS		 500/*************************************************************************
501 * EP93xx pwm peripheral handling
502 *************************************************************************/
503static struct resource ep93xx_pwm0_resource[] = {
ede55aaa 504 DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10),
ef12379f
HS		 505};
506
507static struct platform_device ep93xx_pwm0_device = {
508 .name = "ep93xx-pwm",
509 .id = 0,
510 .num_resources = ARRAY_SIZE(ep93xx_pwm0_resource),
511 .resource = ep93xx_pwm0_resource,
512};
513
514static struct resource ep93xx_pwm1_resource[] = {
ede55aaa 515 DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10),
ef12379f
HS		 516};
517
518static struct platform_device ep93xx_pwm1_device = {
519 .name = "ep93xx-pwm",
520 .id = 1,
521 .num_resources = ARRAY_SIZE(ep93xx_pwm1_resource),
522 .resource = ep93xx_pwm1_resource,
523};
524
525void __init ep93xx_register_pwm(int pwm0, int pwm1)
526{
527 if (pwm0)
528 platform_device_register(&ep93xx_pwm0_device);
529
530 /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
531 if (pwm1)
532 platform_device_register(&ep93xx_pwm1_device);
533}
534
535int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
536{
537 int err;
538
539 if (pdev->id == 0) {
540 err = 0;
541 } else if (pdev->id == 1) {
542 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
543 dev_name(&pdev->dev));
544 if (err)
545 return err;
546 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
547 if (err)
548 goto fail;
549
550 /* PWM 1 output on EGPIO[14] */
551 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
552 } else {
553 err = -ENODEV;
554 }
555
556 return err;
557
558fail:
559 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
560 return err;
561}
562EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
563
564void ep93xx_pwm_release_gpio(struct platform_device *pdev)
565{
566 if (pdev->id == 1) {
567 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
568 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
569
570 /* EGPIO[14] used for GPIO */
571 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
572 }
573}
574EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
575
576
c6012189
RM		 577/*************************************************************************
578 * EP93xx video peripheral handling
579 *************************************************************************/
580static struct ep93xxfb_mach_info ep93xxfb_data;
581
582static struct resource ep93xx_fb_resource[] = {
ede55aaa 583 DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800),
c6012189
RM		 584};
585
586static struct platform_device ep93xx_fb_device = {
587 .name = "ep93xx-fb",
588 .id = -1,
589 .dev = {
b370e082 590 .platform_data = &ep93xxfb_data,
c6012189
RM		 591 .coherent_dma_mask = DMA_BIT_MASK(32),
592 .dma_mask = &ep93xx_fb_device.dev.coherent_dma_mask,
593 },
594 .num_resources = ARRAY_SIZE(ep93xx_fb_resource),
595 .resource = ep93xx_fb_resource,
596};
597
0fd19580
RM		 598/* The backlight use a single register in the framebuffer's register space */
599#define EP93XX_RASTER_REG_BRIGHTNESS 0x20
600
601static struct resource ep93xx_bl_resources[] = {
602 DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
603 EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
604};
605
6ea4b741
HS		 606static struct platform_device ep93xx_bl_device = {
607 .name = "ep93xx-bl",
608 .id = -1,
0fd19580
RM		 609 .num_resources = ARRAY_SIZE(ep93xx_bl_resources),
610 .resource = ep93xx_bl_resources,
6ea4b741
HS		 611};
612
b370e082
HS		 613/**
614 * ep93xx_register_fb - Register the framebuffer platform device.
615 * @data: platform specific framebuffer configuration (__initdata)
616 */
c6012189
RM		 617void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
618{
619 ep93xxfb_data = *data;
620 platform_device_register(&ep93xx_fb_device);
6ea4b741 621 platform_device_register(&ep93xx_bl_device);
c6012189
RM		 622}
623
12f56c68
HS		 624
625/*************************************************************************
626 * EP93xx matrix keypad peripheral handling
627 *************************************************************************/
b370e082
HS		 628static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
629
12f56c68 630static struct resource ep93xx_keypad_resource[] = {
ede55aaa
HS		 631 DEFINE_RES_MEM(EP93XX_KEY_MATRIX_PHYS_BASE, 0x0c),
632 DEFINE_RES_IRQ(IRQ_EP93XX_KEY),
12f56c68
HS		 633};
634
635static struct platform_device ep93xx_keypad_device = {
b370e082
HS		 636 .name = "ep93xx-keypad",
637 .id = -1,
638 .dev = {
639 .platform_data = &ep93xx_keypad_data,
640 },
641 .num_resources = ARRAY_SIZE(ep93xx_keypad_resource),
642 .resource = ep93xx_keypad_resource,
12f56c68
HS		 643};
644
b370e082
HS		 645/**
646 * ep93xx_register_keypad - Register the keypad platform device.
647 * @data: platform specific keypad configuration (__initdata)
648 */
12f56c68
HS		 649void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
650{
b370e082 651 ep93xx_keypad_data = *data;
12f56c68
HS		 652 platform_device_register(&ep93xx_keypad_device);
653}
654
655int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
656{
657 int err;
658 int i;
659
660 for (i = 0; i < 8; i++) {
661 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
662 if (err)
663 goto fail_gpio_c;
664 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
665 if (err)
666 goto fail_gpio_d;
667 }
668
669 /* Enable the keypad controller; GPIO ports C and D used for keypad */
670 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
671 EP93XX_SYSCON_DEVCFG_GONK);
672
673 return 0;
674
675fail_gpio_d:
676 gpio_free(EP93XX_GPIO_LINE_C(i));
677fail_gpio_c:
5528a846 678 for (--i; i >= 0; --i) {
12f56c68
HS		 679 gpio_free(EP93XX_GPIO_LINE_C(i));
680 gpio_free(EP93XX_GPIO_LINE_D(i));
681 }
682 return err;
683}
684EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
685
686void ep93xx_keypad_release_gpio(struct platform_device *pdev)
687{
688 int i;
689
690 for (i = 0; i < 8; i++) {
691 gpio_free(EP93XX_GPIO_LINE_C(i));
692 gpio_free(EP93XX_GPIO_LINE_D(i));
693 }
694
695 /* Disable the keypad controller; GPIO ports C and D used for GPIO */
696 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
697 EP93XX_SYSCON_DEVCFG_GONK);
698}
699EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
700
ed67ea82
RM		 701/*************************************************************************
702 * EP93xx I2S audio peripheral handling
703 *************************************************************************/
704static struct resource ep93xx_i2s_resource[] = {
ede55aaa 705 DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
ed67ea82
RM		 706};
707
708static struct platform_device ep93xx_i2s_device = {
709 .name = "ep93xx-i2s",
710 .id = -1,
711 .num_resources = ARRAY_SIZE(ep93xx_i2s_resource),
712 .resource = ep93xx_i2s_resource,
713};
714
f0fba2ad
LG		 715static struct platform_device ep93xx_pcm_device = {
716 .name = "ep93xx-pcm-audio",
717 .id = -1,
718};
719
ed67ea82
RM		 720void __init ep93xx_register_i2s(void)
721{
722 platform_device_register(&ep93xx_i2s_device);
f0fba2ad 723 platform_device_register(&ep93xx_pcm_device);
ed67ea82
RM		 724}
725
726#define EP93XX_SYSCON_DEVCFG_I2S_MASK (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
727 EP93XX_SYSCON_DEVCFG_I2SONAC97)
728
729#define EP93XX_I2SCLKDIV_MASK (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
730 EP93XX_SYSCON_I2SCLKDIV_SPOL)
731
f15855bf 732int ep93xx_i2s_acquire(void)
ed67ea82
RM		 733{
734 unsigned val;
735
f15855bf
RM		 736 ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
737 EP93XX_SYSCON_DEVCFG_I2S_MASK);
ed67ea82
RM		 738
739 /*
740 * This is potentially racy with the clock api for i2s_mclk, sclk and
741 * lrclk. Since the i2s driver is the only user of those clocks we
742 * rely on it to prevent parallel use of this function and the
743 * clock api for the i2s clocks.
744 */
745 val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
746 val &= ~EP93XX_I2SCLKDIV_MASK;
f15855bf 747 val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
ed67ea82
RM		 748 ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
749
750 return 0;
751}
752EXPORT_SYMBOL(ep93xx_i2s_acquire);
753
754void ep93xx_i2s_release(void)
755{
756 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
757}
758EXPORT_SYMBOL(ep93xx_i2s_release);
12f56c68 759
534bc7fa
MW		 760/*************************************************************************
761 * EP93xx AC97 audio peripheral handling
762 *************************************************************************/
763static struct resource ep93xx_ac97_resources[] = {
ede55aaa
HS		 764 DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac),
765 DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR),
534bc7fa
MW		 766};
767
768static struct platform_device ep93xx_ac97_device = {
769 .name = "ep93xx-ac97",
770 .id = -1,
771 .num_resources = ARRAY_SIZE(ep93xx_ac97_resources),
772 .resource = ep93xx_ac97_resources,
773};
774
775void __init ep93xx_register_ac97(void)
776{
777 /*
778 * Make sure that the AC97 pins are not used by I2S.
779 */
780 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
781
782 platform_device_register(&ep93xx_ac97_device);
783 platform_device_register(&ep93xx_pcm_device);
784}
785
73303d12
HS		 786/*************************************************************************
787 * EP93xx Watchdog
788 *************************************************************************/
789static struct resource ep93xx_wdt_resources[] = {
790 DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
791};
792
793static struct platform_device ep93xx_wdt_device = {
794 .name = "ep93xx-wdt",
795 .id = -1,
796 .num_resources = ARRAY_SIZE(ep93xx_wdt_resources),
797 .resource = ep93xx_wdt_resources,
798};
799
e7736d47
LB		 800void __init ep93xx_init_devices(void)
801{
02239f0a
HS		 802 /* Disallow access to MaverickCrunch initially */
803 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
aee85fe8 804
08932d81
RM		 805 /* Default all ports to GPIO */
806 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
807 EP93XX_SYSCON_DEVCFG_GONK |
808 EP93XX_SYSCON_DEVCFG_EONIDE |
809 EP93XX_SYSCON_DEVCFG_GONIDE |
810 EP93XX_SYSCON_DEVCFG_HONIDE);
811
1e4c8842
HS		 812 /* Get the GPIO working early, other devices need it */
813 platform_device_register(&ep93xx_gpio_device);
b685004f 814
aee85fe8
LB		 815 amba_device_register(&uart1_device, &iomem_resource);
816 amba_device_register(&uart2_device, &iomem_resource);
817 amba_device_register(&uart3_device, &iomem_resource);
41658132
LB		 818
819 platform_device_register(&ep93xx_rtc_device);
1f64eb37 820 platform_device_register(&ep93xx_ohci_device);
73303d12 821 platform_device_register(&ep93xx_wdt_device);
a1eacd79
HS		 822
823 gpio_led_register_device(-1, &ep93xx_led_data);
e7736d47 824}
3275166e
RK		 825
826void ep93xx_restart(char mode, const char *cmd)
827{
828 /*
829 * Set then clear the SWRST bit to initiate a software reset
830 */
831 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
832 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
833
834 while (1)
835 ;
836}
c914283f
SG		 837
838void __init ep93xx_init_late(void)
839{
840 crunch_init();
841}
Linux kernel - Deliverables
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