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/timex.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/i2c-gpio.h>
35 #include <linux/spi/spi.h>
36 #include <linux/export.h>
37
38 #include <mach/hardware.h>
39 #include <mach/fb.h>
40 #include <mach/ep93xx_keypad.h>
41 #include <mach/ep93xx_spi.h>
42 #include <mach/gpio-ep93xx.h>
43
44 #include <asm/mach/map.h>
45 #include <asm/mach/time.h>
46
47 #include <asm/hardware/vic.h>
48
49 #include "soc.h"
50
51 /*************************************************************************
52 * Static I/O mappings that are needed for all EP93xx platforms
53 *************************************************************************/
54 static 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
ep93xx_map_io(void)68 void __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 */
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)
117 #define TIMER4_TICKS_PER_JIFFY DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ)
118
119 static unsigned int last_jiffy_time;
120
ep93xx_timer_interrupt(int irq,void * dev_id)121 static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
122 {
123 /* Writing any value clears the timer interrupt */
124 __raw_writel(1, EP93XX_TIMER1_CLEAR);
125
126 /* Recover lost jiffies */
127 while ((signed long)
128 (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time)
129 >= TIMER4_TICKS_PER_JIFFY) {
130 last_jiffy_time += TIMER4_TICKS_PER_JIFFY;
131 timer_tick();
132 }
133
134 return IRQ_HANDLED;
135 }
136
137 static struct irqaction ep93xx_timer_irq = {
138 .name = "ep93xx timer",
139 .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
140 .handler = ep93xx_timer_interrupt,
141 };
142
ep93xx_timer_init(void)143 static void __init ep93xx_timer_init(void)
144 {
145 u32 tmode = EP93XX_TIMER123_CONTROL_MODE |
146 EP93XX_TIMER123_CONTROL_CLKSEL;
147
148 /* Enable periodic HZ timer. */
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);
153
154 /* Enable lost jiffy timer. */
155 __raw_writel(EP93XX_TIMER4_VALUE_HIGH_ENABLE,
156 EP93XX_TIMER4_VALUE_HIGH);
157
158 setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq);
159 }
160
ep93xx_gettimeoffset(void)161 static 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
171 struct sys_timer ep93xx_timer = {
172 .init = ep93xx_timer_init,
173 .offset = ep93xx_gettimeoffset,
174 };
175
176
177 /*************************************************************************
178 * EP93xx IRQ handling
179 *************************************************************************/
ep93xx_init_irq(void)180 void __init ep93xx_init_irq(void)
181 {
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);
184 }
185
186
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 */
195 static DEFINE_SPINLOCK(syscon_swlock);
196
ep93xx_syscon_swlocked_write(unsigned int val,void __iomem * reg)197 void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
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 }
208
ep93xx_devcfg_set_clear(unsigned int set_bits,unsigned int clear_bits)209 void 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);
217 val &= ~clear_bits;
218 val |= set_bits;
219 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
220 __raw_writel(val, EP93XX_SYSCON_DEVCFG);
221
222 spin_unlock_irqrestore(&syscon_swlock, flags);
223 }
224
225 /**
226 * ep93xx_chip_revision() - returns the EP93xx chip revision
227 *
228 * See <mach/platform.h> for more information.
229 */
ep93xx_chip_revision(void)230 unsigned 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 }
239
240 /*************************************************************************
241 * EP93xx GPIO
242 *************************************************************************/
243 static struct resource ep93xx_gpio_resource[] = {
244 {
245 .start = EP93XX_GPIO_PHYS_BASE,
246 .end = EP93XX_GPIO_PHYS_BASE + 0xcc - 1,
247 .flags = IORESOURCE_MEM,
248 },
249 };
250
251 static struct platform_device ep93xx_gpio_device = {
252 .name = "gpio-ep93xx",
253 .id = -1,
254 .num_resources = ARRAY_SIZE(ep93xx_gpio_resource),
255 .resource = ep93xx_gpio_resource,
256 };
257
258 /*************************************************************************
259 * EP93xx peripheral handling
260 *************************************************************************/
261 #define EP93XX_UART_MCR_OFFSET (0x0100)
262
ep93xx_uart_set_mctrl(struct amba_device * dev,void __iomem * base,unsigned int mctrl)263 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
264 void __iomem *base, unsigned int mctrl)
265 {
266 unsigned int mcr;
267
268 mcr = 0;
269 if (mctrl & TIOCM_RTS)
270 mcr |= 2;
271 if (mctrl & TIOCM_DTR)
272 mcr |= 1;
273
274 __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
275 }
276
277 static struct amba_pl010_data ep93xx_uart_data = {
278 .set_mctrl = ep93xx_uart_set_mctrl,
279 };
280
281 static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE,
282 { IRQ_EP93XX_UART1 }, &ep93xx_uart_data);
283
284 static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE,
285 { IRQ_EP93XX_UART2 }, &ep93xx_uart_data);
286
287 static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE,
288 { IRQ_EP93XX_UART3 }, &ep93xx_uart_data);
289
290 static struct resource ep93xx_rtc_resource[] = {
291 {
292 .start = EP93XX_RTC_PHYS_BASE,
293 .end = EP93XX_RTC_PHYS_BASE + 0x10c - 1,
294 .flags = IORESOURCE_MEM,
295 },
296 };
297
298 static struct platform_device ep93xx_rtc_device = {
299 .name = "ep93xx-rtc",
300 .id = -1,
301 .num_resources = ARRAY_SIZE(ep93xx_rtc_resource),
302 .resource = ep93xx_rtc_resource,
303 };
304
305
306 static struct resource ep93xx_ohci_resources[] = {
307 [0] = {
308 .start = EP93XX_USB_PHYS_BASE,
309 .end = EP93XX_USB_PHYS_BASE + 0x0fff,
310 .flags = IORESOURCE_MEM,
311 },
312 [1] = {
313 .start = IRQ_EP93XX_USB,
314 .end = IRQ_EP93XX_USB,
315 .flags = IORESOURCE_IRQ,
316 },
317 };
318
319
320 static struct platform_device ep93xx_ohci_device = {
321 .name = "ep93xx-ohci",
322 .id = -1,
323 .dev = {
324 .dma_mask = &ep93xx_ohci_device.dev.coherent_dma_mask,
325 .coherent_dma_mask = DMA_BIT_MASK(32),
326 },
327 .num_resources = ARRAY_SIZE(ep93xx_ohci_resources),
328 .resource = ep93xx_ohci_resources,
329 };
330
331
332 /*************************************************************************
333 * EP93xx physmap'ed flash
334 *************************************************************************/
335 static struct physmap_flash_data ep93xx_flash_data;
336
337 static struct resource ep93xx_flash_resource = {
338 .flags = IORESOURCE_MEM,
339 };
340
341 static struct platform_device ep93xx_flash = {
342 .name = "physmap-flash",
343 .id = 0,
344 .dev = {
345 .platform_data = &ep93xx_flash_data,
346 },
347 .num_resources = 1,
348 .resource = &ep93xx_flash_resource,
349 };
350
351 /**
352 * ep93xx_register_flash() - Register the external flash device.
353 * @width: bank width in octets
354 * @start: resource start address
355 * @size: resource size
356 */
ep93xx_register_flash(unsigned int width,resource_size_t start,resource_size_t size)357 void __init ep93xx_register_flash(unsigned int width,
358 resource_size_t start, resource_size_t size)
359 {
360 ep93xx_flash_data.width = width;
361
362 ep93xx_flash_resource.start = start;
363 ep93xx_flash_resource.end = start + size - 1;
364
365 platform_device_register(&ep93xx_flash);
366 }
367
368
369 /*************************************************************************
370 * EP93xx ethernet peripheral handling
371 *************************************************************************/
372 static struct ep93xx_eth_data ep93xx_eth_data;
373
374 static struct resource ep93xx_eth_resource[] = {
375 {
376 .start = EP93XX_ETHERNET_PHYS_BASE,
377 .end = EP93XX_ETHERNET_PHYS_BASE + 0xffff,
378 .flags = IORESOURCE_MEM,
379 }, {
380 .start = IRQ_EP93XX_ETHERNET,
381 .end = IRQ_EP93XX_ETHERNET,
382 .flags = IORESOURCE_IRQ,
383 }
384 };
385
386 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
387
388 static struct platform_device ep93xx_eth_device = {
389 .name = "ep93xx-eth",
390 .id = -1,
391 .dev = {
392 .platform_data = &ep93xx_eth_data,
393 .coherent_dma_mask = DMA_BIT_MASK(32),
394 .dma_mask = &ep93xx_eth_dma_mask,
395 },
396 .num_resources = ARRAY_SIZE(ep93xx_eth_resource),
397 .resource = ep93xx_eth_resource,
398 };
399
400 /**
401 * ep93xx_register_eth - Register the built-in ethernet platform device.
402 * @data: platform specific ethernet configuration (__initdata)
403 * @copy_addr: flag indicating that the MAC address should be copied
404 * from the IndAd registers (as programmed by the bootloader)
405 */
ep93xx_register_eth(struct ep93xx_eth_data * data,int copy_addr)406 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
407 {
408 if (copy_addr)
409 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
410
411 ep93xx_eth_data = *data;
412 platform_device_register(&ep93xx_eth_device);
413 }
414
415
416 /*************************************************************************
417 * EP93xx i2c peripheral handling
418 *************************************************************************/
419 static struct i2c_gpio_platform_data ep93xx_i2c_data;
420
421 static struct platform_device ep93xx_i2c_device = {
422 .name = "i2c-gpio",
423 .id = 0,
424 .dev = {
425 .platform_data = &ep93xx_i2c_data,
426 },
427 };
428
429 /**
430 * ep93xx_register_i2c - Register the i2c platform device.
431 * @data: platform specific i2c-gpio configuration (__initdata)
432 * @devices: platform specific i2c bus device information (__initdata)
433 * @num: the number of devices on the i2c bus
434 */
ep93xx_register_i2c(struct i2c_gpio_platform_data * data,struct i2c_board_info * devices,int num)435 void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
436 struct i2c_board_info *devices, int num)
437 {
438 /*
439 * Set the EEPROM interface pin drive type control.
440 * Defines the driver type for the EECLK and EEDAT pins as either
441 * open drain, which will require an external pull-up, or a normal
442 * CMOS driver.
443 */
444 if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
445 pr_warning("sda != EEDAT, open drain has no effect\n");
446 if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
447 pr_warning("scl != EECLK, open drain has no effect\n");
448
449 __raw_writel((data->sda_is_open_drain << 1) |
450 (data->scl_is_open_drain << 0),
451 EP93XX_GPIO_EEDRIVE);
452
453 ep93xx_i2c_data = *data;
454 i2c_register_board_info(0, devices, num);
455 platform_device_register(&ep93xx_i2c_device);
456 }
457
458 /*************************************************************************
459 * EP93xx SPI peripheral handling
460 *************************************************************************/
461 static struct ep93xx_spi_info ep93xx_spi_master_data;
462
463 static struct resource ep93xx_spi_resources[] = {
464 {
465 .start = EP93XX_SPI_PHYS_BASE,
466 .end = EP93XX_SPI_PHYS_BASE + 0x18 - 1,
467 .flags = IORESOURCE_MEM,
468 },
469 {
470 .start = IRQ_EP93XX_SSP,
471 .end = IRQ_EP93XX_SSP,
472 .flags = IORESOURCE_IRQ,
473 },
474 };
475
476 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
477
478 static struct platform_device ep93xx_spi_device = {
479 .name = "ep93xx-spi",
480 .id = 0,
481 .dev = {
482 .platform_data = &ep93xx_spi_master_data,
483 .coherent_dma_mask = DMA_BIT_MASK(32),
484 .dma_mask = &ep93xx_spi_dma_mask,
485 },
486 .num_resources = ARRAY_SIZE(ep93xx_spi_resources),
487 .resource = ep93xx_spi_resources,
488 };
489
490 /**
491 * ep93xx_register_spi() - registers spi platform device
492 * @info: ep93xx board specific spi master info (__initdata)
493 * @devices: SPI devices to register (__initdata)
494 * @num: number of SPI devices to register
495 *
496 * This function registers platform device for the EP93xx SPI controller and
497 * also makes sure that SPI pins are muxed so that I2S is not using those pins.
498 */
ep93xx_register_spi(struct ep93xx_spi_info * info,struct spi_board_info * devices,int num)499 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
500 struct spi_board_info *devices, int num)
501 {
502 /*
503 * When SPI is used, we need to make sure that I2S is muxed off from
504 * SPI pins.
505 */
506 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
507
508 ep93xx_spi_master_data = *info;
509 spi_register_board_info(devices, num);
510 platform_device_register(&ep93xx_spi_device);
511 }
512
513 /*************************************************************************
514 * EP93xx LEDs
515 *************************************************************************/
516 static struct gpio_led ep93xx_led_pins[] = {
517 {
518 .name = "platform:grled",
519 .gpio = EP93XX_GPIO_LINE_GRLED,
520 }, {
521 .name = "platform:rdled",
522 .gpio = EP93XX_GPIO_LINE_RDLED,
523 },
524 };
525
526 static struct gpio_led_platform_data ep93xx_led_data = {
527 .num_leds = ARRAY_SIZE(ep93xx_led_pins),
528 .leds = ep93xx_led_pins,
529 };
530
531 static struct platform_device ep93xx_leds = {
532 .name = "leds-gpio",
533 .id = -1,
534 .dev = {
535 .platform_data = &ep93xx_led_data,
536 },
537 };
538
539
540 /*************************************************************************
541 * EP93xx pwm peripheral handling
542 *************************************************************************/
543 static struct resource ep93xx_pwm0_resource[] = {
544 {
545 .start = EP93XX_PWM_PHYS_BASE,
546 .end = EP93XX_PWM_PHYS_BASE + 0x10 - 1,
547 .flags = IORESOURCE_MEM,
548 },
549 };
550
551 static struct platform_device ep93xx_pwm0_device = {
552 .name = "ep93xx-pwm",
553 .id = 0,
554 .num_resources = ARRAY_SIZE(ep93xx_pwm0_resource),
555 .resource = ep93xx_pwm0_resource,
556 };
557
558 static struct resource ep93xx_pwm1_resource[] = {
559 {
560 .start = EP93XX_PWM_PHYS_BASE + 0x20,
561 .end = EP93XX_PWM_PHYS_BASE + 0x30 - 1,
562 .flags = IORESOURCE_MEM,
563 },
564 };
565
566 static struct platform_device ep93xx_pwm1_device = {
567 .name = "ep93xx-pwm",
568 .id = 1,
569 .num_resources = ARRAY_SIZE(ep93xx_pwm1_resource),
570 .resource = ep93xx_pwm1_resource,
571 };
572
ep93xx_register_pwm(int pwm0,int pwm1)573 void __init ep93xx_register_pwm(int pwm0, int pwm1)
574 {
575 if (pwm0)
576 platform_device_register(&ep93xx_pwm0_device);
577
578 /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
579 if (pwm1)
580 platform_device_register(&ep93xx_pwm1_device);
581 }
582
ep93xx_pwm_acquire_gpio(struct platform_device * pdev)583 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
584 {
585 int err;
586
587 if (pdev->id == 0) {
588 err = 0;
589 } else if (pdev->id == 1) {
590 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
591 dev_name(&pdev->dev));
592 if (err)
593 return err;
594 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
595 if (err)
596 goto fail;
597
598 /* PWM 1 output on EGPIO[14] */
599 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
600 } else {
601 err = -ENODEV;
602 }
603
604 return err;
605
606 fail:
607 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
608 return err;
609 }
610 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
611
ep93xx_pwm_release_gpio(struct platform_device * pdev)612 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
613 {
614 if (pdev->id == 1) {
615 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
616 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
617
618 /* EGPIO[14] used for GPIO */
619 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
620 }
621 }
622 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
623
624
625 /*************************************************************************
626 * EP93xx video peripheral handling
627 *************************************************************************/
628 static struct ep93xxfb_mach_info ep93xxfb_data;
629
630 static struct resource ep93xx_fb_resource[] = {
631 {
632 .start = EP93XX_RASTER_PHYS_BASE,
633 .end = EP93XX_RASTER_PHYS_BASE + 0x800 - 1,
634 .flags = IORESOURCE_MEM,
635 },
636 };
637
638 static struct platform_device ep93xx_fb_device = {
639 .name = "ep93xx-fb",
640 .id = -1,
641 .dev = {
642 .platform_data = &ep93xxfb_data,
643 .coherent_dma_mask = DMA_BIT_MASK(32),
644 .dma_mask = &ep93xx_fb_device.dev.coherent_dma_mask,
645 },
646 .num_resources = ARRAY_SIZE(ep93xx_fb_resource),
647 .resource = ep93xx_fb_resource,
648 };
649
650 /* The backlight use a single register in the framebuffer's register space */
651 #define EP93XX_RASTER_REG_BRIGHTNESS 0x20
652
653 static struct resource ep93xx_bl_resources[] = {
654 DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
655 EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
656 };
657
658 static struct platform_device ep93xx_bl_device = {
659 .name = "ep93xx-bl",
660 .id = -1,
661 .num_resources = ARRAY_SIZE(ep93xx_bl_resources),
662 .resource = ep93xx_bl_resources,
663 };
664
665 /**
666 * ep93xx_register_fb - Register the framebuffer platform device.
667 * @data: platform specific framebuffer configuration (__initdata)
668 */
ep93xx_register_fb(struct ep93xxfb_mach_info * data)669 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
670 {
671 ep93xxfb_data = *data;
672 platform_device_register(&ep93xx_fb_device);
673 platform_device_register(&ep93xx_bl_device);
674 }
675
676
677 /*************************************************************************
678 * EP93xx matrix keypad peripheral handling
679 *************************************************************************/
680 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
681
682 static struct resource ep93xx_keypad_resource[] = {
683 {
684 .start = EP93XX_KEY_MATRIX_PHYS_BASE,
685 .end = EP93XX_KEY_MATRIX_PHYS_BASE + 0x0c - 1,
686 .flags = IORESOURCE_MEM,
687 }, {
688 .start = IRQ_EP93XX_KEY,
689 .end = IRQ_EP93XX_KEY,
690 .flags = IORESOURCE_IRQ,
691 },
692 };
693
694 static struct platform_device ep93xx_keypad_device = {
695 .name = "ep93xx-keypad",
696 .id = -1,
697 .dev = {
698 .platform_data = &ep93xx_keypad_data,
699 },
700 .num_resources = ARRAY_SIZE(ep93xx_keypad_resource),
701 .resource = ep93xx_keypad_resource,
702 };
703
704 /**
705 * ep93xx_register_keypad - Register the keypad platform device.
706 * @data: platform specific keypad configuration (__initdata)
707 */
ep93xx_register_keypad(struct ep93xx_keypad_platform_data * data)708 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
709 {
710 ep93xx_keypad_data = *data;
711 platform_device_register(&ep93xx_keypad_device);
712 }
713
ep93xx_keypad_acquire_gpio(struct platform_device * pdev)714 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
715 {
716 int err;
717 int i;
718
719 for (i = 0; i < 8; i++) {
720 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
721 if (err)
722 goto fail_gpio_c;
723 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
724 if (err)
725 goto fail_gpio_d;
726 }
727
728 /* Enable the keypad controller; GPIO ports C and D used for keypad */
729 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
730 EP93XX_SYSCON_DEVCFG_GONK);
731
732 return 0;
733
734 fail_gpio_d:
735 gpio_free(EP93XX_GPIO_LINE_C(i));
736 fail_gpio_c:
737 for ( ; i >= 0; --i) {
738 gpio_free(EP93XX_GPIO_LINE_C(i));
739 gpio_free(EP93XX_GPIO_LINE_D(i));
740 }
741 return err;
742 }
743 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
744
ep93xx_keypad_release_gpio(struct platform_device * pdev)745 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
746 {
747 int i;
748
749 for (i = 0; i < 8; i++) {
750 gpio_free(EP93XX_GPIO_LINE_C(i));
751 gpio_free(EP93XX_GPIO_LINE_D(i));
752 }
753
754 /* Disable the keypad controller; GPIO ports C and D used for GPIO */
755 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
756 EP93XX_SYSCON_DEVCFG_GONK);
757 }
758 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
759
760 /*************************************************************************
761 * EP93xx I2S audio peripheral handling
762 *************************************************************************/
763 static struct resource ep93xx_i2s_resource[] = {
764 {
765 .start = EP93XX_I2S_PHYS_BASE,
766 .end = EP93XX_I2S_PHYS_BASE + 0x100 - 1,
767 .flags = IORESOURCE_MEM,
768 },
769 };
770
771 static struct platform_device ep93xx_i2s_device = {
772 .name = "ep93xx-i2s",
773 .id = -1,
774 .num_resources = ARRAY_SIZE(ep93xx_i2s_resource),
775 .resource = ep93xx_i2s_resource,
776 };
777
778 static struct platform_device ep93xx_pcm_device = {
779 .name = "ep93xx-pcm-audio",
780 .id = -1,
781 };
782
ep93xx_register_i2s(void)783 void __init ep93xx_register_i2s(void)
784 {
785 platform_device_register(&ep93xx_i2s_device);
786 platform_device_register(&ep93xx_pcm_device);
787 }
788
789 #define EP93XX_SYSCON_DEVCFG_I2S_MASK (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
790 EP93XX_SYSCON_DEVCFG_I2SONAC97)
791
792 #define EP93XX_I2SCLKDIV_MASK (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
793 EP93XX_SYSCON_I2SCLKDIV_SPOL)
794
ep93xx_i2s_acquire(void)795 int ep93xx_i2s_acquire(void)
796 {
797 unsigned val;
798
799 ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
800 EP93XX_SYSCON_DEVCFG_I2S_MASK);
801
802 /*
803 * This is potentially racy with the clock api for i2s_mclk, sclk and
804 * lrclk. Since the i2s driver is the only user of those clocks we
805 * rely on it to prevent parallel use of this function and the
806 * clock api for the i2s clocks.
807 */
808 val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
809 val &= ~EP93XX_I2SCLKDIV_MASK;
810 val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
811 ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
812
813 return 0;
814 }
815 EXPORT_SYMBOL(ep93xx_i2s_acquire);
816
ep93xx_i2s_release(void)817 void ep93xx_i2s_release(void)
818 {
819 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
820 }
821 EXPORT_SYMBOL(ep93xx_i2s_release);
822
823 /*************************************************************************
824 * EP93xx AC97 audio peripheral handling
825 *************************************************************************/
826 static struct resource ep93xx_ac97_resources[] = {
827 {
828 .start = EP93XX_AAC_PHYS_BASE,
829 .end = EP93XX_AAC_PHYS_BASE + 0xac - 1,
830 .flags = IORESOURCE_MEM,
831 },
832 {
833 .start = IRQ_EP93XX_AACINTR,
834 .end = IRQ_EP93XX_AACINTR,
835 .flags = IORESOURCE_IRQ,
836 },
837 };
838
839 static struct platform_device ep93xx_ac97_device = {
840 .name = "ep93xx-ac97",
841 .id = -1,
842 .num_resources = ARRAY_SIZE(ep93xx_ac97_resources),
843 .resource = ep93xx_ac97_resources,
844 };
845
ep93xx_register_ac97(void)846 void __init ep93xx_register_ac97(void)
847 {
848 /*
849 * Make sure that the AC97 pins are not used by I2S.
850 */
851 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
852
853 platform_device_register(&ep93xx_ac97_device);
854 platform_device_register(&ep93xx_pcm_device);
855 }
856
857 /*************************************************************************
858 * EP93xx Watchdog
859 *************************************************************************/
860 static struct resource ep93xx_wdt_resources[] = {
861 DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
862 };
863
864 static struct platform_device ep93xx_wdt_device = {
865 .name = "ep93xx-wdt",
866 .id = -1,
867 .num_resources = ARRAY_SIZE(ep93xx_wdt_resources),
868 .resource = ep93xx_wdt_resources,
869 };
870
ep93xx_init_devices(void)871 void __init ep93xx_init_devices(void)
872 {
873 /* Disallow access to MaverickCrunch initially */
874 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
875
876 /* Default all ports to GPIO */
877 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
878 EP93XX_SYSCON_DEVCFG_GONK |
879 EP93XX_SYSCON_DEVCFG_EONIDE |
880 EP93XX_SYSCON_DEVCFG_GONIDE |
881 EP93XX_SYSCON_DEVCFG_HONIDE);
882
883 /* Get the GPIO working early, other devices need it */
884 platform_device_register(&ep93xx_gpio_device);
885
886 amba_device_register(&uart1_device, &iomem_resource);
887 amba_device_register(&uart2_device, &iomem_resource);
888 amba_device_register(&uart3_device, &iomem_resource);
889
890 platform_device_register(&ep93xx_rtc_device);
891 platform_device_register(&ep93xx_ohci_device);
892 platform_device_register(&ep93xx_leds);
893 platform_device_register(&ep93xx_wdt_device);
894 }
895
ep93xx_restart(char mode,const char * cmd)896 void ep93xx_restart(char mode, const char *cmd)
897 {
898 /*
899 * Set then clear the SWRST bit to initiate a software reset
900 */
901 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
902 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
903
904 while (1)
905 ;
906 }
907