2 * arch/arm/mach-ep93xx/core.c
3 * Core routines for Cirrus EP93xx chips.
5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
6 * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
8 * Thanks go to Michael Burian and Ray Lehtiniemi for their key
9 * role in the ep93xx linux community.
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.
17 #define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt
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>
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>
37 #include <mach/hardware.h>
39 #include <mach/ep93xx_keypad.h>
40 #include <mach/ep93xx_spi.h>
42 #include <asm/mach/map.h>
43 #include <asm/mach/time.h>
45 #include <asm/hardware/vic.h>
48 /*************************************************************************
49 * Static I/O mappings that are needed for all EP93xx platforms
50 *************************************************************************/
51 static struct map_desc ep93xx_io_desc
[] __initdata
= {
53 .virtual = EP93XX_AHB_VIRT_BASE
,
54 .pfn
= __phys_to_pfn(EP93XX_AHB_PHYS_BASE
),
55 .length
= EP93XX_AHB_SIZE
,
58 .virtual = EP93XX_APB_VIRT_BASE
,
59 .pfn
= __phys_to_pfn(EP93XX_APB_PHYS_BASE
),
60 .length
= EP93XX_APB_SIZE
,
65 void __init
ep93xx_map_io(void)
67 iotable_init(ep93xx_io_desc
, ARRAY_SIZE(ep93xx_io_desc
));
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.
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.
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.
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)
110 #define EP93XX_TIMER123_CLOCK 508469
111 #define EP93XX_TIMER4_CLOCK 983040
113 #define TIMER1_RELOAD ((EP93XX_TIMER123_CLOCK / HZ) - 1)
114 #define TIMER4_TICKS_PER_JIFFY DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ)
116 static unsigned int last_jiffy_time
;
118 static irqreturn_t
ep93xx_timer_interrupt(int irq
, void *dev_id
)
120 /* Writing any value clears the timer interrupt */
121 __raw_writel(1, EP93XX_TIMER1_CLEAR
);
123 /* Recover lost jiffies */
125 (__raw_readl(EP93XX_TIMER4_VALUE_LOW
) - last_jiffy_time
)
126 >= TIMER4_TICKS_PER_JIFFY
) {
127 last_jiffy_time
+= TIMER4_TICKS_PER_JIFFY
;
134 static struct irqaction ep93xx_timer_irq
= {
135 .name
= "ep93xx timer",
136 .flags
= IRQF_DISABLED
| IRQF_TIMER
| IRQF_IRQPOLL
,
137 .handler
= ep93xx_timer_interrupt
,
140 static void __init
ep93xx_timer_init(void)
142 u32 tmode
= EP93XX_TIMER123_CONTROL_MODE
|
143 EP93XX_TIMER123_CONTROL_CLKSEL
;
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
);
151 /* Enable lost jiffy timer. */
152 __raw_writel(EP93XX_TIMER4_VALUE_HIGH_ENABLE
,
153 EP93XX_TIMER4_VALUE_HIGH
);
155 setup_irq(IRQ_EP93XX_TIMER1
, &ep93xx_timer_irq
);
158 static unsigned long ep93xx_gettimeoffset(void)
162 offset
= __raw_readl(EP93XX_TIMER4_VALUE_LOW
) - last_jiffy_time
;
164 /* Calculate (1000000 / 983040) * offset. */
165 return offset
+ (53 * offset
/ 3072);
168 struct sys_timer ep93xx_timer
= {
169 .init
= ep93xx_timer_init
,
170 .offset
= ep93xx_gettimeoffset
,
174 /*************************************************************************
175 * EP93xx IRQ handling
176 *************************************************************************/
177 extern void ep93xx_gpio_init_irq(void);
179 void __init
ep93xx_init_irq(void)
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);
184 ep93xx_gpio_init_irq();
188 /*************************************************************************
189 * EP93xx System Controller Software Locked register handling
190 *************************************************************************/
193 * syscon_swlock prevents anything else from writing to the syscon
194 * block while a software locked register is being written.
196 static DEFINE_SPINLOCK(syscon_swlock
);
198 void ep93xx_syscon_swlocked_write(unsigned int val
, void __iomem
*reg
)
202 spin_lock_irqsave(&syscon_swlock
, flags
);
204 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK
);
205 __raw_writel(val
, reg
);
207 spin_unlock_irqrestore(&syscon_swlock
, flags
);
209 EXPORT_SYMBOL(ep93xx_syscon_swlocked_write
);
211 void ep93xx_devcfg_set_clear(unsigned int set_bits
, unsigned int clear_bits
)
216 spin_lock_irqsave(&syscon_swlock
, flags
);
218 val
= __raw_readl(EP93XX_SYSCON_DEVCFG
);
221 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK
);
222 __raw_writel(val
, EP93XX_SYSCON_DEVCFG
);
224 spin_unlock_irqrestore(&syscon_swlock
, flags
);
226 EXPORT_SYMBOL(ep93xx_devcfg_set_clear
);
229 * ep93xx_chip_revision() - returns the EP93xx chip revision
231 * See <mach/platform.h> for more information.
233 unsigned int ep93xx_chip_revision(void)
237 v
= __raw_readl(EP93XX_SYSCON_SYSCFG
);
238 v
&= EP93XX_SYSCON_SYSCFG_REV_MASK
;
239 v
>>= EP93XX_SYSCON_SYSCFG_REV_SHIFT
;
243 /*************************************************************************
244 * EP93xx peripheral handling
245 *************************************************************************/
246 #define EP93XX_UART_MCR_OFFSET (0x0100)
248 static void ep93xx_uart_set_mctrl(struct amba_device
*dev
,
249 void __iomem
*base
, unsigned int mctrl
)
254 if (!(mctrl
& TIOCM_RTS
))
256 if (!(mctrl
& TIOCM_DTR
))
259 __raw_writel(mcr
, base
+ EP93XX_UART_MCR_OFFSET
);
262 static struct amba_pl010_data ep93xx_uart_data
= {
263 .set_mctrl
= ep93xx_uart_set_mctrl
,
266 static struct amba_device uart1_device
= {
268 .init_name
= "apb:uart1",
269 .platform_data
= &ep93xx_uart_data
,
272 .start
= EP93XX_UART1_PHYS_BASE
,
273 .end
= EP93XX_UART1_PHYS_BASE
+ 0x0fff,
274 .flags
= IORESOURCE_MEM
,
276 .irq
= { IRQ_EP93XX_UART1
, NO_IRQ
},
277 .periphid
= 0x00041010,
280 static struct amba_device uart2_device
= {
282 .init_name
= "apb:uart2",
283 .platform_data
= &ep93xx_uart_data
,
286 .start
= EP93XX_UART2_PHYS_BASE
,
287 .end
= EP93XX_UART2_PHYS_BASE
+ 0x0fff,
288 .flags
= IORESOURCE_MEM
,
290 .irq
= { IRQ_EP93XX_UART2
, NO_IRQ
},
291 .periphid
= 0x00041010,
294 static struct amba_device uart3_device
= {
296 .init_name
= "apb:uart3",
297 .platform_data
= &ep93xx_uart_data
,
300 .start
= EP93XX_UART3_PHYS_BASE
,
301 .end
= EP93XX_UART3_PHYS_BASE
+ 0x0fff,
302 .flags
= IORESOURCE_MEM
,
304 .irq
= { IRQ_EP93XX_UART3
, NO_IRQ
},
305 .periphid
= 0x00041010,
309 static struct resource ep93xx_rtc_resource
[] = {
311 .start
= EP93XX_RTC_PHYS_BASE
,
312 .end
= EP93XX_RTC_PHYS_BASE
+ 0x10c - 1,
313 .flags
= IORESOURCE_MEM
,
317 static struct platform_device ep93xx_rtc_device
= {
318 .name
= "ep93xx-rtc",
320 .num_resources
= ARRAY_SIZE(ep93xx_rtc_resource
),
321 .resource
= ep93xx_rtc_resource
,
325 static struct resource ep93xx_ohci_resources
[] = {
327 .start
= EP93XX_USB_PHYS_BASE
,
328 .end
= EP93XX_USB_PHYS_BASE
+ 0x0fff,
329 .flags
= IORESOURCE_MEM
,
332 .start
= IRQ_EP93XX_USB
,
333 .end
= IRQ_EP93XX_USB
,
334 .flags
= IORESOURCE_IRQ
,
339 static struct platform_device ep93xx_ohci_device
= {
340 .name
= "ep93xx-ohci",
343 .dma_mask
= &ep93xx_ohci_device
.dev
.coherent_dma_mask
,
344 .coherent_dma_mask
= DMA_BIT_MASK(32),
346 .num_resources
= ARRAY_SIZE(ep93xx_ohci_resources
),
347 .resource
= ep93xx_ohci_resources
,
351 /*************************************************************************
352 * EP93xx physmap'ed flash
353 *************************************************************************/
354 static struct physmap_flash_data ep93xx_flash_data
;
356 static struct resource ep93xx_flash_resource
= {
357 .flags
= IORESOURCE_MEM
,
360 static struct platform_device ep93xx_flash
= {
361 .name
= "physmap-flash",
364 .platform_data
= &ep93xx_flash_data
,
367 .resource
= &ep93xx_flash_resource
,
371 * ep93xx_register_flash() - Register the external flash device.
372 * @width: bank width in octets
373 * @start: resource start address
374 * @size: resource size
376 void __init
ep93xx_register_flash(unsigned int width
,
377 resource_size_t start
, resource_size_t size
)
379 ep93xx_flash_data
.width
= width
;
381 ep93xx_flash_resource
.start
= start
;
382 ep93xx_flash_resource
.end
= start
+ size
- 1;
384 platform_device_register(&ep93xx_flash
);
388 /*************************************************************************
389 * EP93xx ethernet peripheral handling
390 *************************************************************************/
391 static struct ep93xx_eth_data ep93xx_eth_data
;
393 static struct resource ep93xx_eth_resource
[] = {
395 .start
= EP93XX_ETHERNET_PHYS_BASE
,
396 .end
= EP93XX_ETHERNET_PHYS_BASE
+ 0xffff,
397 .flags
= IORESOURCE_MEM
,
399 .start
= IRQ_EP93XX_ETHERNET
,
400 .end
= IRQ_EP93XX_ETHERNET
,
401 .flags
= IORESOURCE_IRQ
,
405 static u64 ep93xx_eth_dma_mask
= DMA_BIT_MASK(32);
407 static struct platform_device ep93xx_eth_device
= {
408 .name
= "ep93xx-eth",
411 .platform_data
= &ep93xx_eth_data
,
412 .coherent_dma_mask
= DMA_BIT_MASK(32),
413 .dma_mask
= &ep93xx_eth_dma_mask
,
415 .num_resources
= ARRAY_SIZE(ep93xx_eth_resource
),
416 .resource
= ep93xx_eth_resource
,
420 * ep93xx_register_eth - Register the built-in ethernet platform device.
421 * @data: platform specific ethernet configuration (__initdata)
422 * @copy_addr: flag indicating that the MAC address should be copied
423 * from the IndAd registers (as programmed by the bootloader)
425 void __init
ep93xx_register_eth(struct ep93xx_eth_data
*data
, int copy_addr
)
428 memcpy_fromio(data
->dev_addr
, EP93XX_ETHERNET_BASE
+ 0x50, 6);
430 ep93xx_eth_data
= *data
;
431 platform_device_register(&ep93xx_eth_device
);
435 /*************************************************************************
436 * EP93xx i2c peripheral handling
437 *************************************************************************/
438 static struct i2c_gpio_platform_data ep93xx_i2c_data
;
440 static struct platform_device ep93xx_i2c_device
= {
444 .platform_data
= &ep93xx_i2c_data
,
449 * ep93xx_register_i2c - Register the i2c platform device.
450 * @data: platform specific i2c-gpio configuration (__initdata)
451 * @devices: platform specific i2c bus device information (__initdata)
452 * @num: the number of devices on the i2c bus
454 void __init
ep93xx_register_i2c(struct i2c_gpio_platform_data
*data
,
455 struct i2c_board_info
*devices
, int num
)
458 * Set the EEPROM interface pin drive type control.
459 * Defines the driver type for the EECLK and EEDAT pins as either
460 * open drain, which will require an external pull-up, or a normal
463 if (data
->sda_is_open_drain
&& data
->sda_pin
!= EP93XX_GPIO_LINE_EEDAT
)
464 pr_warning("sda != EEDAT, open drain has no effect\n");
465 if (data
->scl_is_open_drain
&& data
->scl_pin
!= EP93XX_GPIO_LINE_EECLK
)
466 pr_warning("scl != EECLK, open drain has no effect\n");
468 __raw_writel((data
->sda_is_open_drain
<< 1) |
469 (data
->scl_is_open_drain
<< 0),
470 EP93XX_GPIO_EEDRIVE
);
472 ep93xx_i2c_data
= *data
;
473 i2c_register_board_info(0, devices
, num
);
474 platform_device_register(&ep93xx_i2c_device
);
477 /*************************************************************************
478 * EP93xx SPI peripheral handling
479 *************************************************************************/
480 static struct ep93xx_spi_info ep93xx_spi_master_data
;
482 static struct resource ep93xx_spi_resources
[] = {
484 .start
= EP93XX_SPI_PHYS_BASE
,
485 .end
= EP93XX_SPI_PHYS_BASE
+ 0x18 - 1,
486 .flags
= IORESOURCE_MEM
,
489 .start
= IRQ_EP93XX_SSP
,
490 .end
= IRQ_EP93XX_SSP
,
491 .flags
= IORESOURCE_IRQ
,
495 static struct platform_device ep93xx_spi_device
= {
496 .name
= "ep93xx-spi",
499 .platform_data
= &ep93xx_spi_master_data
,
501 .num_resources
= ARRAY_SIZE(ep93xx_spi_resources
),
502 .resource
= ep93xx_spi_resources
,
506 * ep93xx_register_spi() - registers spi platform device
507 * @info: ep93xx board specific spi master info (__initdata)
508 * @devices: SPI devices to register (__initdata)
509 * @num: number of SPI devices to register
511 * This function registers platform device for the EP93xx SPI controller and
512 * also makes sure that SPI pins are muxed so that I2S is not using those pins.
514 void __init
ep93xx_register_spi(struct ep93xx_spi_info
*info
,
515 struct spi_board_info
*devices
, int num
)
518 * When SPI is used, we need to make sure that I2S is muxed off from
521 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP
);
523 ep93xx_spi_master_data
= *info
;
524 spi_register_board_info(devices
, num
);
525 platform_device_register(&ep93xx_spi_device
);
528 /*************************************************************************
530 *************************************************************************/
531 static struct gpio_led ep93xx_led_pins
[] = {
533 .name
= "platform:grled",
534 .gpio
= EP93XX_GPIO_LINE_GRLED
,
536 .name
= "platform:rdled",
537 .gpio
= EP93XX_GPIO_LINE_RDLED
,
541 static struct gpio_led_platform_data ep93xx_led_data
= {
542 .num_leds
= ARRAY_SIZE(ep93xx_led_pins
),
543 .leds
= ep93xx_led_pins
,
546 static struct platform_device ep93xx_leds
= {
550 .platform_data
= &ep93xx_led_data
,
555 /*************************************************************************
556 * EP93xx pwm peripheral handling
557 *************************************************************************/
558 static struct resource ep93xx_pwm0_resource
[] = {
560 .start
= EP93XX_PWM_PHYS_BASE
,
561 .end
= EP93XX_PWM_PHYS_BASE
+ 0x10 - 1,
562 .flags
= IORESOURCE_MEM
,
566 static struct platform_device ep93xx_pwm0_device
= {
567 .name
= "ep93xx-pwm",
569 .num_resources
= ARRAY_SIZE(ep93xx_pwm0_resource
),
570 .resource
= ep93xx_pwm0_resource
,
573 static struct resource ep93xx_pwm1_resource
[] = {
575 .start
= EP93XX_PWM_PHYS_BASE
+ 0x20,
576 .end
= EP93XX_PWM_PHYS_BASE
+ 0x30 - 1,
577 .flags
= IORESOURCE_MEM
,
581 static struct platform_device ep93xx_pwm1_device
= {
582 .name
= "ep93xx-pwm",
584 .num_resources
= ARRAY_SIZE(ep93xx_pwm1_resource
),
585 .resource
= ep93xx_pwm1_resource
,
588 void __init
ep93xx_register_pwm(int pwm0
, int pwm1
)
591 platform_device_register(&ep93xx_pwm0_device
);
593 /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
595 platform_device_register(&ep93xx_pwm1_device
);
598 int ep93xx_pwm_acquire_gpio(struct platform_device
*pdev
)
604 } else if (pdev
->id
== 1) {
605 err
= gpio_request(EP93XX_GPIO_LINE_EGPIO14
,
606 dev_name(&pdev
->dev
));
609 err
= gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14
, 0);
613 /* PWM 1 output on EGPIO[14] */
614 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG
);
622 gpio_free(EP93XX_GPIO_LINE_EGPIO14
);
625 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio
);
627 void ep93xx_pwm_release_gpio(struct platform_device
*pdev
)
630 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14
);
631 gpio_free(EP93XX_GPIO_LINE_EGPIO14
);
633 /* EGPIO[14] used for GPIO */
634 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG
);
637 EXPORT_SYMBOL(ep93xx_pwm_release_gpio
);
640 /*************************************************************************
641 * EP93xx video peripheral handling
642 *************************************************************************/
643 static struct ep93xxfb_mach_info ep93xxfb_data
;
645 static struct resource ep93xx_fb_resource
[] = {
647 .start
= EP93XX_RASTER_PHYS_BASE
,
648 .end
= EP93XX_RASTER_PHYS_BASE
+ 0x800 - 1,
649 .flags
= IORESOURCE_MEM
,
653 static struct platform_device ep93xx_fb_device
= {
657 .platform_data
= &ep93xxfb_data
,
658 .coherent_dma_mask
= DMA_BIT_MASK(32),
659 .dma_mask
= &ep93xx_fb_device
.dev
.coherent_dma_mask
,
661 .num_resources
= ARRAY_SIZE(ep93xx_fb_resource
),
662 .resource
= ep93xx_fb_resource
,
665 static struct platform_device ep93xx_bl_device
= {
671 * ep93xx_register_fb - Register the framebuffer platform device.
672 * @data: platform specific framebuffer configuration (__initdata)
674 void __init
ep93xx_register_fb(struct ep93xxfb_mach_info
*data
)
676 ep93xxfb_data
= *data
;
677 platform_device_register(&ep93xx_fb_device
);
678 platform_device_register(&ep93xx_bl_device
);
682 /*************************************************************************
683 * EP93xx matrix keypad peripheral handling
684 *************************************************************************/
685 static struct ep93xx_keypad_platform_data ep93xx_keypad_data
;
687 static struct resource ep93xx_keypad_resource
[] = {
689 .start
= EP93XX_KEY_MATRIX_PHYS_BASE
,
690 .end
= EP93XX_KEY_MATRIX_PHYS_BASE
+ 0x0c - 1,
691 .flags
= IORESOURCE_MEM
,
693 .start
= IRQ_EP93XX_KEY
,
694 .end
= IRQ_EP93XX_KEY
,
695 .flags
= IORESOURCE_IRQ
,
699 static struct platform_device ep93xx_keypad_device
= {
700 .name
= "ep93xx-keypad",
703 .platform_data
= &ep93xx_keypad_data
,
705 .num_resources
= ARRAY_SIZE(ep93xx_keypad_resource
),
706 .resource
= ep93xx_keypad_resource
,
710 * ep93xx_register_keypad - Register the keypad platform device.
711 * @data: platform specific keypad configuration (__initdata)
713 void __init
ep93xx_register_keypad(struct ep93xx_keypad_platform_data
*data
)
715 ep93xx_keypad_data
= *data
;
716 platform_device_register(&ep93xx_keypad_device
);
719 int ep93xx_keypad_acquire_gpio(struct platform_device
*pdev
)
724 for (i
= 0; i
< 8; i
++) {
725 err
= gpio_request(EP93XX_GPIO_LINE_C(i
), dev_name(&pdev
->dev
));
728 err
= gpio_request(EP93XX_GPIO_LINE_D(i
), dev_name(&pdev
->dev
));
733 /* Enable the keypad controller; GPIO ports C and D used for keypad */
734 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS
|
735 EP93XX_SYSCON_DEVCFG_GONK
);
740 gpio_free(EP93XX_GPIO_LINE_C(i
));
742 for ( ; i
>= 0; --i
) {
743 gpio_free(EP93XX_GPIO_LINE_C(i
));
744 gpio_free(EP93XX_GPIO_LINE_D(i
));
748 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio
);
750 void ep93xx_keypad_release_gpio(struct platform_device
*pdev
)
754 for (i
= 0; i
< 8; i
++) {
755 gpio_free(EP93XX_GPIO_LINE_C(i
));
756 gpio_free(EP93XX_GPIO_LINE_D(i
));
759 /* Disable the keypad controller; GPIO ports C and D used for GPIO */
760 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS
|
761 EP93XX_SYSCON_DEVCFG_GONK
);
763 EXPORT_SYMBOL(ep93xx_keypad_release_gpio
);
765 /*************************************************************************
766 * EP93xx I2S audio peripheral handling
767 *************************************************************************/
768 static struct resource ep93xx_i2s_resource
[] = {
770 .start
= EP93XX_I2S_PHYS_BASE
,
771 .end
= EP93XX_I2S_PHYS_BASE
+ 0x100 - 1,
772 .flags
= IORESOURCE_MEM
,
776 static struct platform_device ep93xx_i2s_device
= {
777 .name
= "ep93xx-i2s",
779 .num_resources
= ARRAY_SIZE(ep93xx_i2s_resource
),
780 .resource
= ep93xx_i2s_resource
,
783 static struct platform_device ep93xx_pcm_device
= {
784 .name
= "ep93xx-pcm-audio",
788 void __init
ep93xx_register_i2s(void)
790 platform_device_register(&ep93xx_i2s_device
);
791 platform_device_register(&ep93xx_pcm_device
);
794 #define EP93XX_SYSCON_DEVCFG_I2S_MASK (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
795 EP93XX_SYSCON_DEVCFG_I2SONAC97)
797 #define EP93XX_I2SCLKDIV_MASK (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
798 EP93XX_SYSCON_I2SCLKDIV_SPOL)
800 int ep93xx_i2s_acquire(unsigned i2s_pins
, unsigned i2s_config
)
805 if (i2s_pins
& ~EP93XX_SYSCON_DEVCFG_I2S_MASK
)
807 if (i2s_config
& ~EP93XX_I2SCLKDIV_MASK
)
810 /* Must have only one of I2SONSSP/I2SONAC97 set */
811 if ((i2s_pins
& EP93XX_SYSCON_DEVCFG_I2SONSSP
) ==
812 (i2s_pins
& EP93XX_SYSCON_DEVCFG_I2SONAC97
))
815 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK
);
816 ep93xx_devcfg_set_bits(i2s_pins
);
819 * This is potentially racy with the clock api for i2s_mclk, sclk and
820 * lrclk. Since the i2s driver is the only user of those clocks we
821 * rely on it to prevent parallel use of this function and the
822 * clock api for the i2s clocks.
824 val
= __raw_readl(EP93XX_SYSCON_I2SCLKDIV
);
825 val
&= ~EP93XX_I2SCLKDIV_MASK
;
827 ep93xx_syscon_swlocked_write(val
, EP93XX_SYSCON_I2SCLKDIV
);
831 EXPORT_SYMBOL(ep93xx_i2s_acquire
);
833 void ep93xx_i2s_release(void)
835 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK
);
837 EXPORT_SYMBOL(ep93xx_i2s_release
);
839 /*************************************************************************
840 * EP93xx AC97 audio peripheral handling
841 *************************************************************************/
842 static struct resource ep93xx_ac97_resources
[] = {
844 .start
= EP93XX_AAC_PHYS_BASE
,
845 .end
= EP93XX_AAC_PHYS_BASE
+ 0xac - 1,
846 .flags
= IORESOURCE_MEM
,
849 .start
= IRQ_EP93XX_AACINTR
,
850 .end
= IRQ_EP93XX_AACINTR
,
851 .flags
= IORESOURCE_IRQ
,
855 static struct platform_device ep93xx_ac97_device
= {
856 .name
= "ep93xx-ac97",
858 .num_resources
= ARRAY_SIZE(ep93xx_ac97_resources
),
859 .resource
= ep93xx_ac97_resources
,
862 void __init
ep93xx_register_ac97(void)
865 * Make sure that the AC97 pins are not used by I2S.
867 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97
);
869 platform_device_register(&ep93xx_ac97_device
);
870 platform_device_register(&ep93xx_pcm_device
);
873 extern void ep93xx_gpio_init(void);
875 void __init
ep93xx_init_devices(void)
877 /* Disallow access to MaverickCrunch initially */
878 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA
);
882 amba_device_register(&uart1_device
, &iomem_resource
);
883 amba_device_register(&uart2_device
, &iomem_resource
);
884 amba_device_register(&uart3_device
, &iomem_resource
);
886 platform_device_register(&ep93xx_rtc_device
);
887 platform_device_register(&ep93xx_ohci_device
);
888 platform_device_register(&ep93xx_leds
);