1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * arch/arm/mach-ep93xx/core.c
4 * Core routines for Cirrus EP93xx chips.
6 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
7 * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
9 * Thanks go to Michael Burian and Ray Lehtiniemi for their key
10 * role in the ep93xx linux community.
13 #define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/platform_device.h>
18 #include <linux/interrupt.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/sys_soc.h>
21 #include <linux/irq.h>
23 #include <linux/gpio.h>
24 #include <linux/leds.h>
25 #include <linux/uaccess.h>
26 #include <linux/termios.h>
27 #include <linux/amba/bus.h>
28 #include <linux/amba/serial.h>
29 #include <linux/mtd/physmap.h>
30 #include <linux/i2c.h>
31 #include <linux/gpio/machine.h>
32 #include <linux/spi/spi.h>
33 #include <linux/export.h>
34 #include <linux/irqchip/arm-vic.h>
35 #include <linux/reboot.h>
36 #include <linux/usb/ohci_pdriver.h>
37 #include <linux/random.h>
40 #include <linux/platform_data/video-ep93xx.h>
41 #include <linux/platform_data/keypad-ep93xx.h>
42 #include <linux/platform_data/spi-ep93xx.h>
43 #include <linux/soc/cirrus/ep93xx.h>
45 #include "gpio-ep93xx.h"
47 #include <asm/mach/arch.h>
48 #include <asm/mach/map.h>
53 /*************************************************************************
54 * Static I/O mappings that are needed for all EP93xx platforms
55 *************************************************************************/
56 static struct map_desc ep93xx_io_desc[] __initdata = {
58 .virtual = EP93XX_AHB_VIRT_BASE,
59 .pfn = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
60 .length = EP93XX_AHB_SIZE,
63 .virtual = EP93XX_APB_VIRT_BASE,
64 .pfn = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
65 .length = EP93XX_APB_SIZE,
70 void __init ep93xx_map_io(void)
72 iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
75 /*************************************************************************
77 *************************************************************************/
78 void __init ep93xx_init_irq(void)
80 vic_init(EP93XX_VIC1_BASE, IRQ_EP93XX_VIC0, EP93XX_VIC1_VALID_IRQ_MASK, 0);
81 vic_init(EP93XX_VIC2_BASE, IRQ_EP93XX_VIC1, EP93XX_VIC2_VALID_IRQ_MASK, 0);
85 /*************************************************************************
86 * EP93xx System Controller Software Locked register handling
87 *************************************************************************/
90 * syscon_swlock prevents anything else from writing to the syscon
91 * block while a software locked register is being written.
93 static DEFINE_SPINLOCK(syscon_swlock);
95 void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
99 spin_lock_irqsave(&syscon_swlock, flags);
101 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
102 __raw_writel(val, reg);
104 spin_unlock_irqrestore(&syscon_swlock, flags);
107 void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
112 spin_lock_irqsave(&syscon_swlock, flags);
114 val = __raw_readl(EP93XX_SYSCON_DEVCFG);
117 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
118 __raw_writel(val, EP93XX_SYSCON_DEVCFG);
120 spin_unlock_irqrestore(&syscon_swlock, flags);
124 * ep93xx_chip_revision() - returns the EP93xx chip revision
126 * See "platform.h" for more information.
128 unsigned int ep93xx_chip_revision(void)
132 v = __raw_readl(EP93XX_SYSCON_SYSCFG);
133 v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
134 v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
137 EXPORT_SYMBOL_GPL(ep93xx_chip_revision);
139 /*************************************************************************
141 *************************************************************************/
142 static struct resource ep93xx_gpio_resource[] = {
143 DEFINE_RES_MEM(EP93XX_GPIO_PHYS_BASE, 0xcc),
144 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO_AB),
145 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO0MUX),
146 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO1MUX),
147 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO2MUX),
148 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO3MUX),
149 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO4MUX),
150 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO5MUX),
151 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO6MUX),
152 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO7MUX),
155 static struct platform_device ep93xx_gpio_device = {
156 .name = "gpio-ep93xx",
158 .num_resources = ARRAY_SIZE(ep93xx_gpio_resource),
159 .resource = ep93xx_gpio_resource,
162 /*************************************************************************
163 * EP93xx peripheral handling
164 *************************************************************************/
165 #define EP93XX_UART_MCR_OFFSET (0x0100)
167 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
168 void __iomem *base, unsigned int mctrl)
173 if (mctrl & TIOCM_RTS)
175 if (mctrl & TIOCM_DTR)
178 __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
181 static struct amba_pl010_data ep93xx_uart_data = {
182 .set_mctrl = ep93xx_uart_set_mctrl,
185 static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE,
186 { IRQ_EP93XX_UART1 }, &ep93xx_uart_data);
188 static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE,
189 { IRQ_EP93XX_UART2 }, NULL);
191 static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE,
192 { IRQ_EP93XX_UART3 }, &ep93xx_uart_data);
194 static struct resource ep93xx_rtc_resource[] = {
195 DEFINE_RES_MEM(EP93XX_RTC_PHYS_BASE, 0x10c),
198 static struct platform_device ep93xx_rtc_device = {
199 .name = "ep93xx-rtc",
201 .num_resources = ARRAY_SIZE(ep93xx_rtc_resource),
202 .resource = ep93xx_rtc_resource,
205 /*************************************************************************
206 * EP93xx OHCI USB Host
207 *************************************************************************/
209 static struct clk *ep93xx_ohci_host_clock;
211 static int ep93xx_ohci_power_on(struct platform_device *pdev)
213 if (!ep93xx_ohci_host_clock) {
214 ep93xx_ohci_host_clock = devm_clk_get(&pdev->dev, NULL);
215 if (IS_ERR(ep93xx_ohci_host_clock))
216 return PTR_ERR(ep93xx_ohci_host_clock);
219 return clk_prepare_enable(ep93xx_ohci_host_clock);
222 static void ep93xx_ohci_power_off(struct platform_device *pdev)
224 clk_disable(ep93xx_ohci_host_clock);
227 static struct usb_ohci_pdata ep93xx_ohci_pdata = {
228 .power_on = ep93xx_ohci_power_on,
229 .power_off = ep93xx_ohci_power_off,
230 .power_suspend = ep93xx_ohci_power_off,
233 static struct resource ep93xx_ohci_resources[] = {
234 DEFINE_RES_MEM(EP93XX_USB_PHYS_BASE, 0x1000),
235 DEFINE_RES_IRQ(IRQ_EP93XX_USB),
238 static u64 ep93xx_ohci_dma_mask = DMA_BIT_MASK(32);
240 static struct platform_device ep93xx_ohci_device = {
241 .name = "ohci-platform",
243 .num_resources = ARRAY_SIZE(ep93xx_ohci_resources),
244 .resource = ep93xx_ohci_resources,
246 .dma_mask = &ep93xx_ohci_dma_mask,
247 .coherent_dma_mask = DMA_BIT_MASK(32),
248 .platform_data = &ep93xx_ohci_pdata,
252 /*************************************************************************
253 * EP93xx physmap'ed flash
254 *************************************************************************/
255 static struct physmap_flash_data ep93xx_flash_data;
257 static struct resource ep93xx_flash_resource = {
258 .flags = IORESOURCE_MEM,
261 static struct platform_device ep93xx_flash = {
262 .name = "physmap-flash",
265 .platform_data = &ep93xx_flash_data,
268 .resource = &ep93xx_flash_resource,
272 * ep93xx_register_flash() - Register the external flash device.
273 * @width: bank width in octets
274 * @start: resource start address
275 * @size: resource size
277 void __init ep93xx_register_flash(unsigned int width,
278 resource_size_t start, resource_size_t size)
280 ep93xx_flash_data.width = width;
282 ep93xx_flash_resource.start = start;
283 ep93xx_flash_resource.end = start + size - 1;
285 platform_device_register(&ep93xx_flash);
289 /*************************************************************************
290 * EP93xx ethernet peripheral handling
291 *************************************************************************/
292 static struct ep93xx_eth_data ep93xx_eth_data;
294 static struct resource ep93xx_eth_resource[] = {
295 DEFINE_RES_MEM(EP93XX_ETHERNET_PHYS_BASE, 0x10000),
296 DEFINE_RES_IRQ(IRQ_EP93XX_ETHERNET),
299 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
301 static struct platform_device ep93xx_eth_device = {
302 .name = "ep93xx-eth",
305 .platform_data = &ep93xx_eth_data,
306 .coherent_dma_mask = DMA_BIT_MASK(32),
307 .dma_mask = &ep93xx_eth_dma_mask,
309 .num_resources = ARRAY_SIZE(ep93xx_eth_resource),
310 .resource = ep93xx_eth_resource,
314 * ep93xx_register_eth - Register the built-in ethernet platform device.
315 * @data: platform specific ethernet configuration (__initdata)
316 * @copy_addr: flag indicating that the MAC address should be copied
317 * from the IndAd registers (as programmed by the bootloader)
319 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
322 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
324 ep93xx_eth_data = *data;
325 platform_device_register(&ep93xx_eth_device);
329 /*************************************************************************
330 * EP93xx i2c peripheral handling
331 *************************************************************************/
333 /* All EP93xx devices use the same two GPIO pins for I2C bit-banging */
334 static struct gpiod_lookup_table ep93xx_i2c_gpiod_table = {
335 .dev_id = "i2c-gpio.0",
337 /* Use local offsets on gpiochip/port "G" */
338 GPIO_LOOKUP_IDX("G", 1, NULL, 0,
339 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
340 GPIO_LOOKUP_IDX("G", 0, NULL, 1,
341 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
345 static struct platform_device ep93xx_i2c_device = {
349 .platform_data = NULL,
354 * ep93xx_register_i2c - Register the i2c platform device.
355 * @devices: platform specific i2c bus device information (__initdata)
356 * @num: the number of devices on the i2c bus
358 void __init ep93xx_register_i2c(struct i2c_board_info *devices, int num)
361 * FIXME: this just sets the two pins as non-opendrain, as no
362 * platforms tries to do that anyway. Flag the applicable lines
363 * as open drain in the GPIO_LOOKUP above and the driver or
364 * gpiolib will handle open drain/open drain emulation as need
365 * be. Right now i2c-gpio emulates open drain which is not
368 __raw_writel((0 << 1) | (0 << 0),
369 EP93XX_GPIO_EEDRIVE);
371 i2c_register_board_info(0, devices, num);
372 gpiod_add_lookup_table(&ep93xx_i2c_gpiod_table);
373 platform_device_register(&ep93xx_i2c_device);
376 /*************************************************************************
377 * EP93xx SPI peripheral handling
378 *************************************************************************/
379 static struct ep93xx_spi_info ep93xx_spi_master_data;
381 static struct resource ep93xx_spi_resources[] = {
382 DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18),
383 DEFINE_RES_IRQ(IRQ_EP93XX_SSP),
386 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
388 static struct platform_device ep93xx_spi_device = {
389 .name = "ep93xx-spi",
392 .platform_data = &ep93xx_spi_master_data,
393 .coherent_dma_mask = DMA_BIT_MASK(32),
394 .dma_mask = &ep93xx_spi_dma_mask,
396 .num_resources = ARRAY_SIZE(ep93xx_spi_resources),
397 .resource = ep93xx_spi_resources,
401 * ep93xx_register_spi() - registers spi platform device
402 * @info: ep93xx board specific spi master info (__initdata)
403 * @devices: SPI devices to register (__initdata)
404 * @num: number of SPI devices to register
406 * This function registers platform device for the EP93xx SPI controller and
407 * also makes sure that SPI pins are muxed so that I2S is not using those pins.
409 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
410 struct spi_board_info *devices, int num)
413 * When SPI is used, we need to make sure that I2S is muxed off from
416 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
418 ep93xx_spi_master_data = *info;
419 spi_register_board_info(devices, num);
420 platform_device_register(&ep93xx_spi_device);
423 /*************************************************************************
425 *************************************************************************/
426 static const struct gpio_led ep93xx_led_pins[] __initconst = {
428 .name = "platform:grled",
430 .name = "platform:rdled",
434 static const struct gpio_led_platform_data ep93xx_led_data __initconst = {
435 .num_leds = ARRAY_SIZE(ep93xx_led_pins),
436 .leds = ep93xx_led_pins,
439 static struct gpiod_lookup_table ep93xx_leds_gpio_table = {
440 .dev_id = "leds-gpio",
442 /* Use local offsets on gpiochip/port "E" */
443 GPIO_LOOKUP_IDX("E", 0, NULL, 0, GPIO_ACTIVE_HIGH),
444 GPIO_LOOKUP_IDX("E", 1, NULL, 1, GPIO_ACTIVE_HIGH),
449 /*************************************************************************
450 * EP93xx pwm peripheral handling
451 *************************************************************************/
452 static struct resource ep93xx_pwm0_resource[] = {
453 DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10),
456 static struct platform_device ep93xx_pwm0_device = {
457 .name = "ep93xx-pwm",
459 .num_resources = ARRAY_SIZE(ep93xx_pwm0_resource),
460 .resource = ep93xx_pwm0_resource,
463 static struct resource ep93xx_pwm1_resource[] = {
464 DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10),
467 static struct platform_device ep93xx_pwm1_device = {
468 .name = "ep93xx-pwm",
470 .num_resources = ARRAY_SIZE(ep93xx_pwm1_resource),
471 .resource = ep93xx_pwm1_resource,
474 void __init ep93xx_register_pwm(int pwm0, int pwm1)
477 platform_device_register(&ep93xx_pwm0_device);
479 /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
481 platform_device_register(&ep93xx_pwm1_device);
484 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
490 } else if (pdev->id == 1) {
491 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
492 dev_name(&pdev->dev));
495 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
499 /* PWM 1 output on EGPIO[14] */
500 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
508 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
511 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
513 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
516 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
517 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
519 /* EGPIO[14] used for GPIO */
520 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
523 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
526 /*************************************************************************
527 * EP93xx video peripheral handling
528 *************************************************************************/
529 static struct ep93xxfb_mach_info ep93xxfb_data;
531 static struct resource ep93xx_fb_resource[] = {
532 DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800),
535 static struct platform_device ep93xx_fb_device = {
539 .platform_data = &ep93xxfb_data,
540 .coherent_dma_mask = DMA_BIT_MASK(32),
541 .dma_mask = &ep93xx_fb_device.dev.coherent_dma_mask,
543 .num_resources = ARRAY_SIZE(ep93xx_fb_resource),
544 .resource = ep93xx_fb_resource,
547 /* The backlight use a single register in the framebuffer's register space */
548 #define EP93XX_RASTER_REG_BRIGHTNESS 0x20
550 static struct resource ep93xx_bl_resources[] = {
551 DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
552 EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
555 static struct platform_device ep93xx_bl_device = {
558 .num_resources = ARRAY_SIZE(ep93xx_bl_resources),
559 .resource = ep93xx_bl_resources,
563 * ep93xx_register_fb - Register the framebuffer platform device.
564 * @data: platform specific framebuffer configuration (__initdata)
566 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
568 ep93xxfb_data = *data;
569 platform_device_register(&ep93xx_fb_device);
570 platform_device_register(&ep93xx_bl_device);
574 /*************************************************************************
575 * EP93xx matrix keypad peripheral handling
576 *************************************************************************/
577 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
579 static struct resource ep93xx_keypad_resource[] = {
580 DEFINE_RES_MEM(EP93XX_KEY_MATRIX_PHYS_BASE, 0x0c),
581 DEFINE_RES_IRQ(IRQ_EP93XX_KEY),
584 static struct platform_device ep93xx_keypad_device = {
585 .name = "ep93xx-keypad",
588 .platform_data = &ep93xx_keypad_data,
590 .num_resources = ARRAY_SIZE(ep93xx_keypad_resource),
591 .resource = ep93xx_keypad_resource,
595 * ep93xx_register_keypad - Register the keypad platform device.
596 * @data: platform specific keypad configuration (__initdata)
598 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
600 ep93xx_keypad_data = *data;
601 platform_device_register(&ep93xx_keypad_device);
604 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
609 for (i = 0; i < 8; i++) {
610 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
613 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
618 /* Enable the keypad controller; GPIO ports C and D used for keypad */
619 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
620 EP93XX_SYSCON_DEVCFG_GONK);
625 gpio_free(EP93XX_GPIO_LINE_C(i));
627 for (--i; i >= 0; --i) {
628 gpio_free(EP93XX_GPIO_LINE_C(i));
629 gpio_free(EP93XX_GPIO_LINE_D(i));
633 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
635 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
639 for (i = 0; i < 8; i++) {
640 gpio_free(EP93XX_GPIO_LINE_C(i));
641 gpio_free(EP93XX_GPIO_LINE_D(i));
644 /* Disable the keypad controller; GPIO ports C and D used for GPIO */
645 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
646 EP93XX_SYSCON_DEVCFG_GONK);
648 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
650 /*************************************************************************
651 * EP93xx I2S audio peripheral handling
652 *************************************************************************/
653 static struct resource ep93xx_i2s_resource[] = {
654 DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
655 DEFINE_RES_IRQ(IRQ_EP93XX_SAI),
658 static struct platform_device ep93xx_i2s_device = {
659 .name = "ep93xx-i2s",
661 .num_resources = ARRAY_SIZE(ep93xx_i2s_resource),
662 .resource = ep93xx_i2s_resource,
665 static struct platform_device ep93xx_pcm_device = {
666 .name = "ep93xx-pcm-audio",
670 void __init ep93xx_register_i2s(void)
672 platform_device_register(&ep93xx_i2s_device);
673 platform_device_register(&ep93xx_pcm_device);
676 #define EP93XX_SYSCON_DEVCFG_I2S_MASK (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
677 EP93XX_SYSCON_DEVCFG_I2SONAC97)
679 #define EP93XX_I2SCLKDIV_MASK (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
680 EP93XX_SYSCON_I2SCLKDIV_SPOL)
682 int ep93xx_i2s_acquire(void)
686 ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
687 EP93XX_SYSCON_DEVCFG_I2S_MASK);
690 * This is potentially racy with the clock api for i2s_mclk, sclk and
691 * lrclk. Since the i2s driver is the only user of those clocks we
692 * rely on it to prevent parallel use of this function and the
693 * clock api for the i2s clocks.
695 val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
696 val &= ~EP93XX_I2SCLKDIV_MASK;
697 val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
698 ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
702 EXPORT_SYMBOL(ep93xx_i2s_acquire);
704 void ep93xx_i2s_release(void)
706 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
708 EXPORT_SYMBOL(ep93xx_i2s_release);
710 /*************************************************************************
711 * EP93xx AC97 audio peripheral handling
712 *************************************************************************/
713 static struct resource ep93xx_ac97_resources[] = {
714 DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac),
715 DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR),
718 static struct platform_device ep93xx_ac97_device = {
719 .name = "ep93xx-ac97",
721 .num_resources = ARRAY_SIZE(ep93xx_ac97_resources),
722 .resource = ep93xx_ac97_resources,
725 void __init ep93xx_register_ac97(void)
728 * Make sure that the AC97 pins are not used by I2S.
730 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
732 platform_device_register(&ep93xx_ac97_device);
733 platform_device_register(&ep93xx_pcm_device);
736 /*************************************************************************
738 *************************************************************************/
739 static struct resource ep93xx_wdt_resources[] = {
740 DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
743 static struct platform_device ep93xx_wdt_device = {
744 .name = "ep93xx-wdt",
746 .num_resources = ARRAY_SIZE(ep93xx_wdt_resources),
747 .resource = ep93xx_wdt_resources,
750 /*************************************************************************
752 *************************************************************************/
753 static struct resource ep93xx_ide_resources[] = {
754 DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38),
755 DEFINE_RES_IRQ(IRQ_EP93XX_EXT3),
758 static struct platform_device ep93xx_ide_device = {
759 .name = "ep93xx-ide",
762 .dma_mask = &ep93xx_ide_device.dev.coherent_dma_mask,
763 .coherent_dma_mask = DMA_BIT_MASK(32),
765 .num_resources = ARRAY_SIZE(ep93xx_ide_resources),
766 .resource = ep93xx_ide_resources,
769 void __init ep93xx_register_ide(void)
771 platform_device_register(&ep93xx_ide_device);
774 int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
779 err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
782 err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
785 for (i = 2; i < 8; i++) {
786 err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
790 for (i = 4; i < 8; i++) {
791 err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
795 for (i = 0; i < 8; i++) {
796 err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
801 /* GPIO ports E[7:2], G[7:4] and H used by IDE */
802 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
803 EP93XX_SYSCON_DEVCFG_GONIDE |
804 EP93XX_SYSCON_DEVCFG_HONIDE);
808 for (--i; i >= 0; --i)
809 gpio_free(EP93XX_GPIO_LINE_H(i));
812 for (--i; i >= 4; --i)
813 gpio_free(EP93XX_GPIO_LINE_G(i));
816 for (--i; i >= 2; --i)
817 gpio_free(EP93XX_GPIO_LINE_E(i));
818 gpio_free(EP93XX_GPIO_LINE_EGPIO15);
820 gpio_free(EP93XX_GPIO_LINE_EGPIO2);
823 EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
825 void ep93xx_ide_release_gpio(struct platform_device *pdev)
829 for (i = 2; i < 8; i++)
830 gpio_free(EP93XX_GPIO_LINE_E(i));
831 for (i = 4; i < 8; i++)
832 gpio_free(EP93XX_GPIO_LINE_G(i));
833 for (i = 0; i < 8; i++)
834 gpio_free(EP93XX_GPIO_LINE_H(i));
835 gpio_free(EP93XX_GPIO_LINE_EGPIO15);
836 gpio_free(EP93XX_GPIO_LINE_EGPIO2);
839 /* GPIO ports E[7:2], G[7:4] and H used by GPIO */
840 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
841 EP93XX_SYSCON_DEVCFG_GONIDE |
842 EP93XX_SYSCON_DEVCFG_HONIDE);
844 EXPORT_SYMBOL(ep93xx_ide_release_gpio);
846 /*************************************************************************
848 *************************************************************************/
849 static struct resource ep93xx_adc_resources[] = {
850 DEFINE_RES_MEM(EP93XX_ADC_PHYS_BASE, 0x28),
851 DEFINE_RES_IRQ(IRQ_EP93XX_TOUCH),
854 static struct platform_device ep93xx_adc_device = {
855 .name = "ep93xx-adc",
857 .num_resources = ARRAY_SIZE(ep93xx_adc_resources),
858 .resource = ep93xx_adc_resources,
861 void __init ep93xx_register_adc(void)
863 /* Power up ADC, deactivate Touch Screen Controller */
864 ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_TIN,
865 EP93XX_SYSCON_DEVCFG_ADCPD);
867 platform_device_register(&ep93xx_adc_device);
870 /*************************************************************************
871 * EP93xx Security peripheral
872 *************************************************************************/
875 * The Maverick Key is 256 bits of micro fuses blown at the factory during
876 * manufacturing to uniquely identify a part.
878 * See: http://arm.cirrus.com/forum/viewtopic.php?t=486&highlight=maverick+key
880 #define EP93XX_SECURITY_REG(x) (EP93XX_SECURITY_BASE + (x))
881 #define EP93XX_SECURITY_SECFLG EP93XX_SECURITY_REG(0x2400)
882 #define EP93XX_SECURITY_FUSEFLG EP93XX_SECURITY_REG(0x2410)
883 #define EP93XX_SECURITY_UNIQID EP93XX_SECURITY_REG(0x2440)
884 #define EP93XX_SECURITY_UNIQCHK EP93XX_SECURITY_REG(0x2450)
885 #define EP93XX_SECURITY_UNIQVAL EP93XX_SECURITY_REG(0x2460)
886 #define EP93XX_SECURITY_SECID1 EP93XX_SECURITY_REG(0x2500)
887 #define EP93XX_SECURITY_SECID2 EP93XX_SECURITY_REG(0x2504)
888 #define EP93XX_SECURITY_SECCHK1 EP93XX_SECURITY_REG(0x2520)
889 #define EP93XX_SECURITY_SECCHK2 EP93XX_SECURITY_REG(0x2524)
890 #define EP93XX_SECURITY_UNIQID2 EP93XX_SECURITY_REG(0x2700)
891 #define EP93XX_SECURITY_UNIQID3 EP93XX_SECURITY_REG(0x2704)
892 #define EP93XX_SECURITY_UNIQID4 EP93XX_SECURITY_REG(0x2708)
893 #define EP93XX_SECURITY_UNIQID5 EP93XX_SECURITY_REG(0x270c)
895 static char ep93xx_soc_id[33];
897 static const char __init *ep93xx_get_soc_id(void)
899 unsigned int id, id2, id3, id4, id5;
901 if (__raw_readl(EP93XX_SECURITY_UNIQVAL) != 1)
902 return "bad Hamming code";
904 id = __raw_readl(EP93XX_SECURITY_UNIQID);
905 id2 = __raw_readl(EP93XX_SECURITY_UNIQID2);
906 id3 = __raw_readl(EP93XX_SECURITY_UNIQID3);
907 id4 = __raw_readl(EP93XX_SECURITY_UNIQID4);
908 id5 = __raw_readl(EP93XX_SECURITY_UNIQID5);
913 /* Toss the unique ID into the entropy pool */
914 add_device_randomness(&id2, 4);
915 add_device_randomness(&id3, 4);
916 add_device_randomness(&id4, 4);
917 add_device_randomness(&id5, 4);
919 snprintf(ep93xx_soc_id, sizeof(ep93xx_soc_id),
920 "%08x%08x%08x%08x", id2, id3, id4, id5);
922 return ep93xx_soc_id;
925 static const char __init *ep93xx_get_soc_rev(void)
927 int rev = ep93xx_chip_revision();
930 case EP93XX_CHIP_REV_D0:
932 case EP93XX_CHIP_REV_D1:
934 case EP93XX_CHIP_REV_E0:
936 case EP93XX_CHIP_REV_E1:
938 case EP93XX_CHIP_REV_E2:
945 static const char __init *ep93xx_get_machine_name(void)
947 return kasprintf(GFP_KERNEL,"%s", machine_desc->name);
950 static struct device __init *ep93xx_init_soc(void)
952 struct soc_device_attribute *soc_dev_attr;
953 struct soc_device *soc_dev;
955 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
959 soc_dev_attr->machine = ep93xx_get_machine_name();
960 soc_dev_attr->family = "Cirrus Logic EP93xx";
961 soc_dev_attr->revision = ep93xx_get_soc_rev();
962 soc_dev_attr->soc_id = ep93xx_get_soc_id();
964 soc_dev = soc_device_register(soc_dev_attr);
965 if (IS_ERR(soc_dev)) {
966 kfree(soc_dev_attr->machine);
971 return soc_device_to_device(soc_dev);
974 struct device __init *ep93xx_init_devices(void)
976 struct device *parent;
978 /* Disallow access to MaverickCrunch initially */
979 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
981 /* Default all ports to GPIO */
982 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
983 EP93XX_SYSCON_DEVCFG_GONK |
984 EP93XX_SYSCON_DEVCFG_EONIDE |
985 EP93XX_SYSCON_DEVCFG_GONIDE |
986 EP93XX_SYSCON_DEVCFG_HONIDE);
988 parent = ep93xx_init_soc();
990 /* Get the GPIO working early, other devices need it */
991 platform_device_register(&ep93xx_gpio_device);
993 amba_device_register(&uart1_device, &iomem_resource);
994 amba_device_register(&uart2_device, &iomem_resource);
995 amba_device_register(&uart3_device, &iomem_resource);
997 platform_device_register(&ep93xx_rtc_device);
998 platform_device_register(&ep93xx_ohci_device);
999 platform_device_register(&ep93xx_wdt_device);
1001 gpiod_add_lookup_table(&ep93xx_leds_gpio_table);
1002 gpio_led_register_device(-1, &ep93xx_led_data);
1007 void ep93xx_restart(enum reboot_mode mode, const char *cmd)
1010 * Set then clear the SWRST bit to initiate a software reset
1012 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
1013 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);