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
37 #include <mach/hardware.h>
38 #include <mach/fb.h>
39 #include <mach/ep93xx_keypad.h>
40 #include <mach/ep93xx_spi.h>
41
42 #include <asm/mach/map.h>
43 #include <asm/mach/time.h>
44
45 #include <asm/hardware/vic.h>
46
47
48 /*************************************************************************
49 * Static I/O mappings that are needed for all EP93xx platforms
50 *************************************************************************/
51 static struct map_desc ep93xx_io_desc[] __initdata = {
52 {
53 .virtual = EP93XX_AHB_VIRT_BASE,
54 .pfn = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
55 .length = EP93XX_AHB_SIZE,
56 .type = MT_DEVICE,
57 }, {
58 .virtual = EP93XX_APB_VIRT_BASE,
59 .pfn = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
60 .length = EP93XX_APB_SIZE,
61 .type = MT_DEVICE,
62 },
63 };
64
ep93xx_map_io(void)65 void __init ep93xx_map_io(void)
66 {
67 iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
68 }
69
70
71 /*************************************************************************
72 * Timer handling for EP93xx
73 *************************************************************************
74 * The ep93xx has four internal timers. Timers 1, 2 (both 16 bit) and
75 * 3 (32 bit) count down at 508 kHz, are self-reloading, and can generate
76 * an interrupt on underflow. Timer 4 (40 bit) counts down at 983.04 kHz,
77 * is free-running, and can't generate interrupts.
78 *
79 * The 508 kHz timers are ideal for use for the timer interrupt, as the
80 * most common values of HZ divide 508 kHz nicely. We pick one of the 16
81 * bit timers (timer 1) since we don't need more than 16 bits of reload
82 * value as long as HZ >= 8.
83 *
84 * The higher clock rate of timer 4 makes it a better choice than the
85 * other timers for use in gettimeoffset(), while the fact that it can't
86 * generate interrupts means we don't have to worry about not being able
87 * to use this timer for something else. We also use timer 4 for keeping
88 * track of lost jiffies.
89 */
90 #define EP93XX_TIMER_REG(x) (EP93XX_TIMER_BASE + (x))
91 #define EP93XX_TIMER1_LOAD EP93XX_TIMER_REG(0x00)
92 #define EP93XX_TIMER1_VALUE EP93XX_TIMER_REG(0x04)
93 #define EP93XX_TIMER1_CONTROL EP93XX_TIMER_REG(0x08)
94 #define EP93XX_TIMER123_CONTROL_ENABLE (1 << 7)
95 #define EP93XX_TIMER123_CONTROL_MODE (1 << 6)
96 #define EP93XX_TIMER123_CONTROL_CLKSEL (1 << 3)
97 #define EP93XX_TIMER1_CLEAR EP93XX_TIMER_REG(0x0c)
98 #define EP93XX_TIMER2_LOAD EP93XX_TIMER_REG(0x20)
99 #define EP93XX_TIMER2_VALUE EP93XX_TIMER_REG(0x24)
100 #define EP93XX_TIMER2_CONTROL EP93XX_TIMER_REG(0x28)
101 #define EP93XX_TIMER2_CLEAR EP93XX_TIMER_REG(0x2c)
102 #define EP93XX_TIMER4_VALUE_LOW EP93XX_TIMER_REG(0x60)
103 #define EP93XX_TIMER4_VALUE_HIGH EP93XX_TIMER_REG(0x64)
104 #define EP93XX_TIMER4_VALUE_HIGH_ENABLE (1 << 8)
105 #define EP93XX_TIMER3_LOAD EP93XX_TIMER_REG(0x80)
106 #define EP93XX_TIMER3_VALUE EP93XX_TIMER_REG(0x84)
107 #define EP93XX_TIMER3_CONTROL EP93XX_TIMER_REG(0x88)
108 #define EP93XX_TIMER3_CLEAR EP93XX_TIMER_REG(0x8c)
109
110 #define EP93XX_TIMER123_CLOCK 508469
111 #define EP93XX_TIMER4_CLOCK 983040
112
113 #define TIMER1_RELOAD ((EP93XX_TIMER123_CLOCK / HZ) - 1)
114 #define TIMER4_TICKS_PER_JIFFY DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ)
115
116 static unsigned int last_jiffy_time;
117
ep93xx_timer_interrupt(int irq,void * dev_id)118 static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
119 {
120 /* Writing any value clears the timer interrupt */
121 __raw_writel(1, EP93XX_TIMER1_CLEAR);
122
123 /* Recover lost jiffies */
124 while ((signed long)
125 (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time)
126 >= TIMER4_TICKS_PER_JIFFY) {
127 last_jiffy_time += TIMER4_TICKS_PER_JIFFY;
128 timer_tick();
129 }
130
131 return IRQ_HANDLED;
132 }
133
134 static struct irqaction ep93xx_timer_irq = {
135 .name = "ep93xx timer",
136 .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
137 .handler = ep93xx_timer_interrupt,
138 };
139
ep93xx_timer_init(void)140 static void __init ep93xx_timer_init(void)
141 {
142 u32 tmode = EP93XX_TIMER123_CONTROL_MODE |
143 EP93XX_TIMER123_CONTROL_CLKSEL;
144
145 /* Enable periodic HZ timer. */
146 __raw_writel(tmode, EP93XX_TIMER1_CONTROL);
147 __raw_writel(TIMER1_RELOAD, EP93XX_TIMER1_LOAD);
148 __raw_writel(tmode | EP93XX_TIMER123_CONTROL_ENABLE,
149 EP93XX_TIMER1_CONTROL);
150
151 /* Enable lost jiffy timer. */
152 __raw_writel(EP93XX_TIMER4_VALUE_HIGH_ENABLE,
153 EP93XX_TIMER4_VALUE_HIGH);
154
155 setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq);
156 }
157
ep93xx_gettimeoffset(void)158 static unsigned long ep93xx_gettimeoffset(void)
159 {
160 int offset;
161
162 offset = __raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time;
163
164 /* Calculate (1000000 / 983040) * offset. */
165 return offset + (53 * offset / 3072);
166 }
167
168 struct sys_timer ep93xx_timer = {
169 .init = ep93xx_timer_init,
170 .offset = ep93xx_gettimeoffset,
171 };
172
173
174 /*************************************************************************
175 * EP93xx IRQ handling
176 *************************************************************************/
177 extern void ep93xx_gpio_init_irq(void);
178
ep93xx_init_irq(void)179 void __init ep93xx_init_irq(void)
180 {
181 vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0);
182 vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0);
183
184 ep93xx_gpio_init_irq();
185 }
186
187
188 /*************************************************************************
189 * EP93xx System Controller Software Locked register handling
190 *************************************************************************/
191
192 /*
193 * syscon_swlock prevents anything else from writing to the syscon
194 * block while a software locked register is being written.
195 */
196 static DEFINE_SPINLOCK(syscon_swlock);
197
ep93xx_syscon_swlocked_write(unsigned int val,void __iomem * reg)198 void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
199 {
200 unsigned long flags;
201
202 spin_lock_irqsave(&syscon_swlock, flags);
203
204 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
205 __raw_writel(val, reg);
206
207 spin_unlock_irqrestore(&syscon_swlock, flags);
208 }
209 EXPORT_SYMBOL(ep93xx_syscon_swlocked_write);
210
ep93xx_devcfg_set_clear(unsigned int set_bits,unsigned int clear_bits)211 void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
212 {
213 unsigned long flags;
214 unsigned int val;
215
216 spin_lock_irqsave(&syscon_swlock, flags);
217
218 val = __raw_readl(EP93XX_SYSCON_DEVCFG);
219 val &= ~clear_bits;
220 val |= set_bits;
221 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
222 __raw_writel(val, EP93XX_SYSCON_DEVCFG);
223
224 spin_unlock_irqrestore(&syscon_swlock, flags);
225 }
226 EXPORT_SYMBOL(ep93xx_devcfg_set_clear);
227
228 /**
229 * ep93xx_chip_revision() - returns the EP93xx chip revision
230 *
231 * See <mach/platform.h> for more information.
232 */
ep93xx_chip_revision(void)233 unsigned int ep93xx_chip_revision(void)
234 {
235 unsigned int v;
236
237 v = __raw_readl(EP93XX_SYSCON_SYSCFG);
238 v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
239 v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
240 return v;
241 }
242
243 /*************************************************************************
244 * EP93xx peripheral handling
245 *************************************************************************/
246 #define EP93XX_UART_MCR_OFFSET (0x0100)
247
ep93xx_uart_set_mctrl(struct amba_device * dev,void __iomem * base,unsigned int mctrl)248 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
249 void __iomem *base, unsigned int mctrl)
250 {
251 unsigned int mcr;
252
253 mcr = 0;
254 if (!(mctrl & TIOCM_RTS))
255 mcr |= 2;
256 if (!(mctrl & TIOCM_DTR))
257 mcr |= 1;
258
259 __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
260 }
261
262 static struct amba_pl010_data ep93xx_uart_data = {
263 .set_mctrl = ep93xx_uart_set_mctrl,
264 };
265
266 static struct amba_device uart1_device = {
267 .dev = {
268 .init_name = "apb:uart1",
269 .platform_data = &ep93xx_uart_data,
270 },
271 .res = {
272 .start = EP93XX_UART1_PHYS_BASE,
273 .end = EP93XX_UART1_PHYS_BASE + 0x0fff,
274 .flags = IORESOURCE_MEM,
275 },
276 .irq = { IRQ_EP93XX_UART1, NO_IRQ },
277 .periphid = 0x00041010,
278 };
279
280 static struct amba_device uart2_device = {
281 .dev = {
282 .init_name = "apb:uart2",
283 .platform_data = &ep93xx_uart_data,
284 },
285 .res = {
286 .start = EP93XX_UART2_PHYS_BASE,
287 .end = EP93XX_UART2_PHYS_BASE + 0x0fff,
288 .flags = IORESOURCE_MEM,
289 },
290 .irq = { IRQ_EP93XX_UART2, NO_IRQ },
291 .periphid = 0x00041010,
292 };
293
294 static struct amba_device uart3_device = {
295 .dev = {
296 .init_name = "apb:uart3",
297 .platform_data = &ep93xx_uart_data,
298 },
299 .res = {
300 .start = EP93XX_UART3_PHYS_BASE,
301 .end = EP93XX_UART3_PHYS_BASE + 0x0fff,
302 .flags = IORESOURCE_MEM,
303 },
304 .irq = { IRQ_EP93XX_UART3, NO_IRQ },
305 .periphid = 0x00041010,
306 };
307
308
309 static struct resource ep93xx_rtc_resource[] = {
310 {
311 .start = EP93XX_RTC_PHYS_BASE,
312 .end = EP93XX_RTC_PHYS_BASE + 0x10c - 1,
313 .flags = IORESOURCE_MEM,
314 },
315 };
316
317 static struct platform_device ep93xx_rtc_device = {
318 .name = "ep93xx-rtc",
319 .id = -1,
320 .num_resources = ARRAY_SIZE(ep93xx_rtc_resource),
321 .resource = ep93xx_rtc_resource,
322 };
323
324
325 static struct resource ep93xx_ohci_resources[] = {
326 [0] = {
327 .start = EP93XX_USB_PHYS_BASE,
328 .end = EP93XX_USB_PHYS_BASE + 0x0fff,
329 .flags = IORESOURCE_MEM,
330 },
331 [1] = {
332 .start = IRQ_EP93XX_USB,
333 .end = IRQ_EP93XX_USB,
334 .flags = IORESOURCE_IRQ,
335 },
336 };
337
338
339 static struct platform_device ep93xx_ohci_device = {
340 .name = "ep93xx-ohci",
341 .id = -1,
342 .dev = {
343 .dma_mask = &ep93xx_ohci_device.dev.coherent_dma_mask,
344 .coherent_dma_mask = DMA_BIT_MASK(32),
345 },
346 .num_resources = ARRAY_SIZE(ep93xx_ohci_resources),
347 .resource = ep93xx_ohci_resources,
348 };
349
350
351 /*************************************************************************
352 * EP93xx physmap'ed flash
353 *************************************************************************/
354 static struct physmap_flash_data ep93xx_flash_data;
355
356 static struct resource ep93xx_flash_resource = {
357 .flags = IORESOURCE_MEM,
358 };
359
360 static struct platform_device ep93xx_flash = {
361 .name = "physmap-flash",
362 .id = 0,
363 .dev = {
364 .platform_data = &ep93xx_flash_data,
365 },
366 .num_resources = 1,
367 .resource = &ep93xx_flash_resource,
368 };
369
370 /**
371 * ep93xx_register_flash() - Register the external flash device.
372 * @width: bank width in octets
373 * @start: resource start address
374 * @size: resource size
375 */
ep93xx_register_flash(unsigned int width,resource_size_t start,resource_size_t size)376 void __init ep93xx_register_flash(unsigned int width,
377 resource_size_t start, resource_size_t size)
378 {
379 ep93xx_flash_data.width = width;
380
381 ep93xx_flash_resource.start = start;
382 ep93xx_flash_resource.end = start + size - 1;
383
384 platform_device_register(&ep93xx_flash);
385 }
386
387
388 /*************************************************************************
389 * EP93xx ethernet peripheral handling
390 *************************************************************************/
391 static struct ep93xx_eth_data ep93xx_eth_data;
392
393 static struct resource ep93xx_eth_resource[] = {
394 {
395 .start = EP93XX_ETHERNET_PHYS_BASE,
396 .end = EP93XX_ETHERNET_PHYS_BASE + 0xffff,
397 .flags = IORESOURCE_MEM,
398 }, {
399 .start = IRQ_EP93XX_ETHERNET,
400 .end = IRQ_EP93XX_ETHERNET,
401 .flags = IORESOURCE_IRQ,
402 }
403 };
404
405 static struct platform_device ep93xx_eth_device = {
406 .name = "ep93xx-eth",
407 .id = -1,
408 .dev = {
409 .platform_data = &ep93xx_eth_data,
410 },
411 .num_resources = ARRAY_SIZE(ep93xx_eth_resource),
412 .resource = ep93xx_eth_resource,
413 };
414
415 /**
416 * ep93xx_register_eth - Register the built-in ethernet platform device.
417 * @data: platform specific ethernet configuration (__initdata)
418 * @copy_addr: flag indicating that the MAC address should be copied
419 * from the IndAd registers (as programmed by the bootloader)
420 */
ep93xx_register_eth(struct ep93xx_eth_data * data,int copy_addr)421 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
422 {
423 if (copy_addr)
424 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
425
426 ep93xx_eth_data = *data;
427 platform_device_register(&ep93xx_eth_device);
428 }
429
430
431 /*************************************************************************
432 * EP93xx i2c peripheral handling
433 *************************************************************************/
434 static struct i2c_gpio_platform_data ep93xx_i2c_data;
435
436 static struct platform_device ep93xx_i2c_device = {
437 .name = "i2c-gpio",
438 .id = 0,
439 .dev = {
440 .platform_data = &ep93xx_i2c_data,
441 },
442 };
443
444 /**
445 * ep93xx_register_i2c - Register the i2c platform device.
446 * @data: platform specific i2c-gpio configuration (__initdata)
447 * @devices: platform specific i2c bus device information (__initdata)
448 * @num: the number of devices on the i2c bus
449 */
ep93xx_register_i2c(struct i2c_gpio_platform_data * data,struct i2c_board_info * devices,int num)450 void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
451 struct i2c_board_info *devices, int num)
452 {
453 /*
454 * Set the EEPROM interface pin drive type control.
455 * Defines the driver type for the EECLK and EEDAT pins as either
456 * open drain, which will require an external pull-up, or a normal
457 * CMOS driver.
458 */
459 if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
460 pr_warning("sda != EEDAT, open drain has no effect\n");
461 if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
462 pr_warning("scl != EECLK, open drain has no effect\n");
463
464 __raw_writel((data->sda_is_open_drain << 1) |
465 (data->scl_is_open_drain << 0),
466 EP93XX_GPIO_EEDRIVE);
467
468 ep93xx_i2c_data = *data;
469 i2c_register_board_info(0, devices, num);
470 platform_device_register(&ep93xx_i2c_device);
471 }
472
473 /*************************************************************************
474 * EP93xx SPI peripheral handling
475 *************************************************************************/
476 static struct ep93xx_spi_info ep93xx_spi_master_data;
477
478 static struct resource ep93xx_spi_resources[] = {
479 {
480 .start = EP93XX_SPI_PHYS_BASE,
481 .end = EP93XX_SPI_PHYS_BASE + 0x18 - 1,
482 .flags = IORESOURCE_MEM,
483 },
484 {
485 .start = IRQ_EP93XX_SSP,
486 .end = IRQ_EP93XX_SSP,
487 .flags = IORESOURCE_IRQ,
488 },
489 };
490
491 static struct platform_device ep93xx_spi_device = {
492 .name = "ep93xx-spi",
493 .id = 0,
494 .dev = {
495 .platform_data = &ep93xx_spi_master_data,
496 },
497 .num_resources = ARRAY_SIZE(ep93xx_spi_resources),
498 .resource = ep93xx_spi_resources,
499 };
500
501 /**
502 * ep93xx_register_spi() - registers spi platform device
503 * @info: ep93xx board specific spi master info (__initdata)
504 * @devices: SPI devices to register (__initdata)
505 * @num: number of SPI devices to register
506 *
507 * This function registers platform device for the EP93xx SPI controller and
508 * also makes sure that SPI pins are muxed so that I2S is not using those pins.
509 */
ep93xx_register_spi(struct ep93xx_spi_info * info,struct spi_board_info * devices,int num)510 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
511 struct spi_board_info *devices, int num)
512 {
513 /*
514 * When SPI is used, we need to make sure that I2S is muxed off from
515 * SPI pins.
516 */
517 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
518
519 ep93xx_spi_master_data = *info;
520 spi_register_board_info(devices, num);
521 platform_device_register(&ep93xx_spi_device);
522 }
523
524 /*************************************************************************
525 * EP93xx LEDs
526 *************************************************************************/
527 static struct gpio_led ep93xx_led_pins[] = {
528 {
529 .name = "platform:grled",
530 .gpio = EP93XX_GPIO_LINE_GRLED,
531 }, {
532 .name = "platform:rdled",
533 .gpio = EP93XX_GPIO_LINE_RDLED,
534 },
535 };
536
537 static struct gpio_led_platform_data ep93xx_led_data = {
538 .num_leds = ARRAY_SIZE(ep93xx_led_pins),
539 .leds = ep93xx_led_pins,
540 };
541
542 static struct platform_device ep93xx_leds = {
543 .name = "leds-gpio",
544 .id = -1,
545 .dev = {
546 .platform_data = &ep93xx_led_data,
547 },
548 };
549
550
551 /*************************************************************************
552 * EP93xx pwm peripheral handling
553 *************************************************************************/
554 static struct resource ep93xx_pwm0_resource[] = {
555 {
556 .start = EP93XX_PWM_PHYS_BASE,
557 .end = EP93XX_PWM_PHYS_BASE + 0x10 - 1,
558 .flags = IORESOURCE_MEM,
559 },
560 };
561
562 static struct platform_device ep93xx_pwm0_device = {
563 .name = "ep93xx-pwm",
564 .id = 0,
565 .num_resources = ARRAY_SIZE(ep93xx_pwm0_resource),
566 .resource = ep93xx_pwm0_resource,
567 };
568
569 static struct resource ep93xx_pwm1_resource[] = {
570 {
571 .start = EP93XX_PWM_PHYS_BASE + 0x20,
572 .end = EP93XX_PWM_PHYS_BASE + 0x30 - 1,
573 .flags = IORESOURCE_MEM,
574 },
575 };
576
577 static struct platform_device ep93xx_pwm1_device = {
578 .name = "ep93xx-pwm",
579 .id = 1,
580 .num_resources = ARRAY_SIZE(ep93xx_pwm1_resource),
581 .resource = ep93xx_pwm1_resource,
582 };
583
ep93xx_register_pwm(int pwm0,int pwm1)584 void __init ep93xx_register_pwm(int pwm0, int pwm1)
585 {
586 if (pwm0)
587 platform_device_register(&ep93xx_pwm0_device);
588
589 /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
590 if (pwm1)
591 platform_device_register(&ep93xx_pwm1_device);
592 }
593
ep93xx_pwm_acquire_gpio(struct platform_device * pdev)594 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
595 {
596 int err;
597
598 if (pdev->id == 0) {
599 err = 0;
600 } else if (pdev->id == 1) {
601 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
602 dev_name(&pdev->dev));
603 if (err)
604 return err;
605 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
606 if (err)
607 goto fail;
608
609 /* PWM 1 output on EGPIO[14] */
610 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
611 } else {
612 err = -ENODEV;
613 }
614
615 return err;
616
617 fail:
618 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
619 return err;
620 }
621 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
622
ep93xx_pwm_release_gpio(struct platform_device * pdev)623 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
624 {
625 if (pdev->id == 1) {
626 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
627 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
628
629 /* EGPIO[14] used for GPIO */
630 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
631 }
632 }
633 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
634
635
636 /*************************************************************************
637 * EP93xx video peripheral handling
638 *************************************************************************/
639 static struct ep93xxfb_mach_info ep93xxfb_data;
640
641 static struct resource ep93xx_fb_resource[] = {
642 {
643 .start = EP93XX_RASTER_PHYS_BASE,
644 .end = EP93XX_RASTER_PHYS_BASE + 0x800 - 1,
645 .flags = IORESOURCE_MEM,
646 },
647 };
648
649 static struct platform_device ep93xx_fb_device = {
650 .name = "ep93xx-fb",
651 .id = -1,
652 .dev = {
653 .platform_data = &ep93xxfb_data,
654 .coherent_dma_mask = DMA_BIT_MASK(32),
655 .dma_mask = &ep93xx_fb_device.dev.coherent_dma_mask,
656 },
657 .num_resources = ARRAY_SIZE(ep93xx_fb_resource),
658 .resource = ep93xx_fb_resource,
659 };
660
661 static struct platform_device ep93xx_bl_device = {
662 .name = "ep93xx-bl",
663 .id = -1,
664 };
665
666 /**
667 * ep93xx_register_fb - Register the framebuffer platform device.
668 * @data: platform specific framebuffer configuration (__initdata)
669 */
ep93xx_register_fb(struct ep93xxfb_mach_info * data)670 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
671 {
672 ep93xxfb_data = *data;
673 platform_device_register(&ep93xx_fb_device);
674 platform_device_register(&ep93xx_bl_device);
675 }
676
677
678 /*************************************************************************
679 * EP93xx matrix keypad peripheral handling
680 *************************************************************************/
681 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
682
683 static struct resource ep93xx_keypad_resource[] = {
684 {
685 .start = EP93XX_KEY_MATRIX_PHYS_BASE,
686 .end = EP93XX_KEY_MATRIX_PHYS_BASE + 0x0c - 1,
687 .flags = IORESOURCE_MEM,
688 }, {
689 .start = IRQ_EP93XX_KEY,
690 .end = IRQ_EP93XX_KEY,
691 .flags = IORESOURCE_IRQ,
692 },
693 };
694
695 static struct platform_device ep93xx_keypad_device = {
696 .name = "ep93xx-keypad",
697 .id = -1,
698 .dev = {
699 .platform_data = &ep93xx_keypad_data,
700 },
701 .num_resources = ARRAY_SIZE(ep93xx_keypad_resource),
702 .resource = ep93xx_keypad_resource,
703 };
704
705 /**
706 * ep93xx_register_keypad - Register the keypad platform device.
707 * @data: platform specific keypad configuration (__initdata)
708 */
ep93xx_register_keypad(struct ep93xx_keypad_platform_data * data)709 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
710 {
711 ep93xx_keypad_data = *data;
712 platform_device_register(&ep93xx_keypad_device);
713 }
714
ep93xx_keypad_acquire_gpio(struct platform_device * pdev)715 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
716 {
717 int err;
718 int i;
719
720 for (i = 0; i < 8; i++) {
721 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
722 if (err)
723 goto fail_gpio_c;
724 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
725 if (err)
726 goto fail_gpio_d;
727 }
728
729 /* Enable the keypad controller; GPIO ports C and D used for keypad */
730 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
731 EP93XX_SYSCON_DEVCFG_GONK);
732
733 return 0;
734
735 fail_gpio_d:
736 gpio_free(EP93XX_GPIO_LINE_C(i));
737 fail_gpio_c:
738 for ( ; i >= 0; --i) {
739 gpio_free(EP93XX_GPIO_LINE_C(i));
740 gpio_free(EP93XX_GPIO_LINE_D(i));
741 }
742 return err;
743 }
744 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
745
ep93xx_keypad_release_gpio(struct platform_device * pdev)746 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
747 {
748 int i;
749
750 for (i = 0; i < 8; i++) {
751 gpio_free(EP93XX_GPIO_LINE_C(i));
752 gpio_free(EP93XX_GPIO_LINE_D(i));
753 }
754
755 /* Disable the keypad controller; GPIO ports C and D used for GPIO */
756 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
757 EP93XX_SYSCON_DEVCFG_GONK);
758 }
759 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
760
761 /*************************************************************************
762 * EP93xx I2S audio peripheral handling
763 *************************************************************************/
764 static struct resource ep93xx_i2s_resource[] = {
765 {
766 .start = EP93XX_I2S_PHYS_BASE,
767 .end = EP93XX_I2S_PHYS_BASE + 0x100 - 1,
768 .flags = IORESOURCE_MEM,
769 },
770 };
771
772 static struct platform_device ep93xx_i2s_device = {
773 .name = "ep93xx-i2s",
774 .id = -1,
775 .num_resources = ARRAY_SIZE(ep93xx_i2s_resource),
776 .resource = ep93xx_i2s_resource,
777 };
778
779 static struct platform_device ep93xx_pcm_device = {
780 .name = "ep93xx-pcm-audio",
781 .id = -1,
782 };
783
ep93xx_register_i2s(void)784 void __init ep93xx_register_i2s(void)
785 {
786 platform_device_register(&ep93xx_i2s_device);
787 platform_device_register(&ep93xx_pcm_device);
788 }
789
790 #define EP93XX_SYSCON_DEVCFG_I2S_MASK (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
791 EP93XX_SYSCON_DEVCFG_I2SONAC97)
792
793 #define EP93XX_I2SCLKDIV_MASK (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
794 EP93XX_SYSCON_I2SCLKDIV_SPOL)
795
ep93xx_i2s_acquire(unsigned i2s_pins,unsigned i2s_config)796 int ep93xx_i2s_acquire(unsigned i2s_pins, unsigned i2s_config)
797 {
798 unsigned val;
799
800 /* Sanity check */
801 if (i2s_pins & ~EP93XX_SYSCON_DEVCFG_I2S_MASK)
802 return -EINVAL;
803 if (i2s_config & ~EP93XX_I2SCLKDIV_MASK)
804 return -EINVAL;
805
806 /* Must have only one of I2SONSSP/I2SONAC97 set */
807 if ((i2s_pins & EP93XX_SYSCON_DEVCFG_I2SONSSP) ==
808 (i2s_pins & EP93XX_SYSCON_DEVCFG_I2SONAC97))
809 return -EINVAL;
810
811 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
812 ep93xx_devcfg_set_bits(i2s_pins);
813
814 /*
815 * This is potentially racy with the clock api for i2s_mclk, sclk and
816 * lrclk. Since the i2s driver is the only user of those clocks we
817 * rely on it to prevent parallel use of this function and the
818 * clock api for the i2s clocks.
819 */
820 val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
821 val &= ~EP93XX_I2SCLKDIV_MASK;
822 val |= i2s_config;
823 ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
824
825 return 0;
826 }
827 EXPORT_SYMBOL(ep93xx_i2s_acquire);
828
ep93xx_i2s_release(void)829 void ep93xx_i2s_release(void)
830 {
831 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
832 }
833 EXPORT_SYMBOL(ep93xx_i2s_release);
834
835 /*************************************************************************
836 * EP93xx AC97 audio peripheral handling
837 *************************************************************************/
838 static struct resource ep93xx_ac97_resources[] = {
839 {
840 .start = EP93XX_AAC_PHYS_BASE,
841 .end = EP93XX_AAC_PHYS_BASE + 0xac - 1,
842 .flags = IORESOURCE_MEM,
843 },
844 {
845 .start = IRQ_EP93XX_AACINTR,
846 .end = IRQ_EP93XX_AACINTR,
847 .flags = IORESOURCE_IRQ,
848 },
849 };
850
851 static struct platform_device ep93xx_ac97_device = {
852 .name = "ep93xx-ac97",
853 .id = -1,
854 .num_resources = ARRAY_SIZE(ep93xx_ac97_resources),
855 .resource = ep93xx_ac97_resources,
856 };
857
ep93xx_register_ac97(void)858 void __init ep93xx_register_ac97(void)
859 {
860 /*
861 * Make sure that the AC97 pins are not used by I2S.
862 */
863 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
864
865 platform_device_register(&ep93xx_ac97_device);
866 platform_device_register(&ep93xx_pcm_device);
867 }
868
869 extern void ep93xx_gpio_init(void);
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 ep93xx_gpio_init();
877
878 amba_device_register(&uart1_device, &iomem_resource);
879 amba_device_register(&uart2_device, &iomem_resource);
880 amba_device_register(&uart3_device, &iomem_resource);
881
882 platform_device_register(&ep93xx_rtc_device);
883 platform_device_register(&ep93xx_ohci_device);
884 platform_device_register(&ep93xx_leds);
885 }
886