1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * arch/arm/mach-ep93xx/core.c
4 * Core routines for Cirrus EP93xx chips.
5 *
6 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
7 * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
8 *
9 * Thanks go to Michael Burian and Ray Lehtiniemi for their key
10 * role in the ep93xx linux community.
11 */
12
13 #define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt
14
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>
22 #include <linux/io.h>
23 #include <linux/gpio.h>
24 #include <linux/leds.h>
25 #include <linux/termios.h>
26 #include <linux/amba/bus.h>
27 #include <linux/amba/serial.h>
28 #include <linux/mtd/physmap.h>
29 #include <linux/i2c.h>
30 #include <linux/gpio/machine.h>
31 #include <linux/spi/spi.h>
32 #include <linux/export.h>
33 #include <linux/irqchip/arm-vic.h>
34 #include <linux/reboot.h>
35 #include <linux/usb/ohci_pdriver.h>
36 #include <linux/random.h>
37
38 #include "hardware.h"
39 #include <linux/platform_data/video-ep93xx.h>
40 #include <linux/platform_data/keypad-ep93xx.h>
41 #include <linux/platform_data/spi-ep93xx.h>
42 #include <linux/soc/cirrus/ep93xx.h>
43
44 #include "gpio-ep93xx.h"
45
46 #include <asm/mach/arch.h>
47 #include <asm/mach/map.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 * EP93xx IRQ handling
75 *************************************************************************/
ep93xx_init_irq(void)76 void __init ep93xx_init_irq(void)
77 {
78 vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0);
79 vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0);
80 }
81
82
83 /*************************************************************************
84 * EP93xx System Controller Software Locked register handling
85 *************************************************************************/
86
87 /*
88 * syscon_swlock prevents anything else from writing to the syscon
89 * block while a software locked register is being written.
90 */
91 static DEFINE_SPINLOCK(syscon_swlock);
92
ep93xx_syscon_swlocked_write(unsigned int val,void __iomem * reg)93 void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
94 {
95 unsigned long flags;
96
97 spin_lock_irqsave(&syscon_swlock, flags);
98
99 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
100 __raw_writel(val, reg);
101
102 spin_unlock_irqrestore(&syscon_swlock, flags);
103 }
104
ep93xx_devcfg_set_clear(unsigned int set_bits,unsigned int clear_bits)105 void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
106 {
107 unsigned long flags;
108 unsigned int val;
109
110 spin_lock_irqsave(&syscon_swlock, flags);
111
112 val = __raw_readl(EP93XX_SYSCON_DEVCFG);
113 val &= ~clear_bits;
114 val |= set_bits;
115 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
116 __raw_writel(val, EP93XX_SYSCON_DEVCFG);
117
118 spin_unlock_irqrestore(&syscon_swlock, flags);
119 }
120
121 /**
122 * ep93xx_chip_revision() - returns the EP93xx chip revision
123 *
124 * See "platform.h" for more information.
125 */
ep93xx_chip_revision(void)126 unsigned int ep93xx_chip_revision(void)
127 {
128 unsigned int v;
129
130 v = __raw_readl(EP93XX_SYSCON_SYSCFG);
131 v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
132 v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
133 return v;
134 }
135 EXPORT_SYMBOL_GPL(ep93xx_chip_revision);
136
137 /*************************************************************************
138 * EP93xx GPIO
139 *************************************************************************/
140 static struct resource ep93xx_gpio_resource[] = {
141 DEFINE_RES_MEM(EP93XX_GPIO_PHYS_BASE, 0xcc),
142 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO_AB),
143 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO0MUX),
144 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO1MUX),
145 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO2MUX),
146 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO3MUX),
147 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO4MUX),
148 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO5MUX),
149 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO6MUX),
150 DEFINE_RES_IRQ(IRQ_EP93XX_GPIO7MUX),
151 };
152
153 static struct platform_device ep93xx_gpio_device = {
154 .name = "gpio-ep93xx",
155 .id = -1,
156 .num_resources = ARRAY_SIZE(ep93xx_gpio_resource),
157 .resource = ep93xx_gpio_resource,
158 };
159
160 /*************************************************************************
161 * EP93xx peripheral handling
162 *************************************************************************/
163 #define EP93XX_UART_MCR_OFFSET (0x0100)
164
ep93xx_uart_set_mctrl(struct amba_device * dev,void __iomem * base,unsigned int mctrl)165 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
166 void __iomem *base, unsigned int mctrl)
167 {
168 unsigned int mcr;
169
170 mcr = 0;
171 if (mctrl & TIOCM_RTS)
172 mcr |= 2;
173 if (mctrl & TIOCM_DTR)
174 mcr |= 1;
175
176 __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
177 }
178
179 static struct amba_pl010_data ep93xx_uart_data = {
180 .set_mctrl = ep93xx_uart_set_mctrl,
181 };
182
183 static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE,
184 { IRQ_EP93XX_UART1 }, &ep93xx_uart_data);
185
186 static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE,
187 { IRQ_EP93XX_UART2 }, NULL);
188
189 static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE,
190 { IRQ_EP93XX_UART3 }, &ep93xx_uart_data);
191
192 static struct resource ep93xx_rtc_resource[] = {
193 DEFINE_RES_MEM(EP93XX_RTC_PHYS_BASE, 0x10c),
194 };
195
196 static struct platform_device ep93xx_rtc_device = {
197 .name = "ep93xx-rtc",
198 .id = -1,
199 .num_resources = ARRAY_SIZE(ep93xx_rtc_resource),
200 .resource = ep93xx_rtc_resource,
201 };
202
203 /*************************************************************************
204 * EP93xx OHCI USB Host
205 *************************************************************************/
206
207 static struct clk *ep93xx_ohci_host_clock;
208
ep93xx_ohci_power_on(struct platform_device * pdev)209 static int ep93xx_ohci_power_on(struct platform_device *pdev)
210 {
211 if (!ep93xx_ohci_host_clock) {
212 ep93xx_ohci_host_clock = devm_clk_get(&pdev->dev, NULL);
213 if (IS_ERR(ep93xx_ohci_host_clock))
214 return PTR_ERR(ep93xx_ohci_host_clock);
215 }
216
217 return clk_enable(ep93xx_ohci_host_clock);
218 }
219
ep93xx_ohci_power_off(struct platform_device * pdev)220 static void ep93xx_ohci_power_off(struct platform_device *pdev)
221 {
222 clk_disable(ep93xx_ohci_host_clock);
223 }
224
225 static struct usb_ohci_pdata ep93xx_ohci_pdata = {
226 .power_on = ep93xx_ohci_power_on,
227 .power_off = ep93xx_ohci_power_off,
228 .power_suspend = ep93xx_ohci_power_off,
229 };
230
231 static struct resource ep93xx_ohci_resources[] = {
232 DEFINE_RES_MEM(EP93XX_USB_PHYS_BASE, 0x1000),
233 DEFINE_RES_IRQ(IRQ_EP93XX_USB),
234 };
235
236 static u64 ep93xx_ohci_dma_mask = DMA_BIT_MASK(32);
237
238 static struct platform_device ep93xx_ohci_device = {
239 .name = "ohci-platform",
240 .id = -1,
241 .num_resources = ARRAY_SIZE(ep93xx_ohci_resources),
242 .resource = ep93xx_ohci_resources,
243 .dev = {
244 .dma_mask = &ep93xx_ohci_dma_mask,
245 .coherent_dma_mask = DMA_BIT_MASK(32),
246 .platform_data = &ep93xx_ohci_pdata,
247 },
248 };
249
250 /*************************************************************************
251 * EP93xx physmap'ed flash
252 *************************************************************************/
253 static struct physmap_flash_data ep93xx_flash_data;
254
255 static struct resource ep93xx_flash_resource = {
256 .flags = IORESOURCE_MEM,
257 };
258
259 static struct platform_device ep93xx_flash = {
260 .name = "physmap-flash",
261 .id = 0,
262 .dev = {
263 .platform_data = &ep93xx_flash_data,
264 },
265 .num_resources = 1,
266 .resource = &ep93xx_flash_resource,
267 };
268
269 /**
270 * ep93xx_register_flash() - Register the external flash device.
271 * @width: bank width in octets
272 * @start: resource start address
273 * @size: resource size
274 */
ep93xx_register_flash(unsigned int width,resource_size_t start,resource_size_t size)275 void __init ep93xx_register_flash(unsigned int width,
276 resource_size_t start, resource_size_t size)
277 {
278 ep93xx_flash_data.width = width;
279
280 ep93xx_flash_resource.start = start;
281 ep93xx_flash_resource.end = start + size - 1;
282
283 platform_device_register(&ep93xx_flash);
284 }
285
286
287 /*************************************************************************
288 * EP93xx ethernet peripheral handling
289 *************************************************************************/
290 static struct ep93xx_eth_data ep93xx_eth_data;
291
292 static struct resource ep93xx_eth_resource[] = {
293 DEFINE_RES_MEM(EP93XX_ETHERNET_PHYS_BASE, 0x10000),
294 DEFINE_RES_IRQ(IRQ_EP93XX_ETHERNET),
295 };
296
297 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
298
299 static struct platform_device ep93xx_eth_device = {
300 .name = "ep93xx-eth",
301 .id = -1,
302 .dev = {
303 .platform_data = &ep93xx_eth_data,
304 .coherent_dma_mask = DMA_BIT_MASK(32),
305 .dma_mask = &ep93xx_eth_dma_mask,
306 },
307 .num_resources = ARRAY_SIZE(ep93xx_eth_resource),
308 .resource = ep93xx_eth_resource,
309 };
310
311 /**
312 * ep93xx_register_eth - Register the built-in ethernet platform device.
313 * @data: platform specific ethernet configuration (__initdata)
314 * @copy_addr: flag indicating that the MAC address should be copied
315 * from the IndAd registers (as programmed by the bootloader)
316 */
ep93xx_register_eth(struct ep93xx_eth_data * data,int copy_addr)317 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
318 {
319 if (copy_addr)
320 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
321
322 ep93xx_eth_data = *data;
323 platform_device_register(&ep93xx_eth_device);
324 }
325
326
327 /*************************************************************************
328 * EP93xx i2c peripheral handling
329 *************************************************************************/
330
331 /* All EP93xx devices use the same two GPIO pins for I2C bit-banging */
332 static struct gpiod_lookup_table ep93xx_i2c_gpiod_table = {
333 .dev_id = "i2c-gpio.0",
334 .table = {
335 /* Use local offsets on gpiochip/port "G" */
336 GPIO_LOOKUP_IDX("G", 1, NULL, 0,
337 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
338 GPIO_LOOKUP_IDX("G", 0, NULL, 1,
339 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
340 },
341 };
342
343 static struct platform_device ep93xx_i2c_device = {
344 .name = "i2c-gpio",
345 .id = 0,
346 .dev = {
347 .platform_data = NULL,
348 },
349 };
350
351 /**
352 * ep93xx_register_i2c - Register the i2c platform device.
353 * @devices: platform specific i2c bus device information (__initdata)
354 * @num: the number of devices on the i2c bus
355 */
ep93xx_register_i2c(struct i2c_board_info * devices,int num)356 void __init ep93xx_register_i2c(struct i2c_board_info *devices, int num)
357 {
358 /*
359 * FIXME: this just sets the two pins as non-opendrain, as no
360 * platforms tries to do that anyway. Flag the applicable lines
361 * as open drain in the GPIO_LOOKUP above and the driver or
362 * gpiolib will handle open drain/open drain emulation as need
363 * be. Right now i2c-gpio emulates open drain which is not
364 * optimal.
365 */
366 __raw_writel((0 << 1) | (0 << 0),
367 EP93XX_GPIO_EEDRIVE);
368
369 i2c_register_board_info(0, devices, num);
370 gpiod_add_lookup_table(&ep93xx_i2c_gpiod_table);
371 platform_device_register(&ep93xx_i2c_device);
372 }
373
374 /*************************************************************************
375 * EP93xx SPI peripheral handling
376 *************************************************************************/
377 static struct ep93xx_spi_info ep93xx_spi_master_data;
378
379 static struct resource ep93xx_spi_resources[] = {
380 DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18),
381 DEFINE_RES_IRQ(IRQ_EP93XX_SSP),
382 };
383
384 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
385
386 static struct platform_device ep93xx_spi_device = {
387 .name = "ep93xx-spi",
388 .id = 0,
389 .dev = {
390 .platform_data = &ep93xx_spi_master_data,
391 .coherent_dma_mask = DMA_BIT_MASK(32),
392 .dma_mask = &ep93xx_spi_dma_mask,
393 },
394 .num_resources = ARRAY_SIZE(ep93xx_spi_resources),
395 .resource = ep93xx_spi_resources,
396 };
397
398 /**
399 * ep93xx_register_spi() - registers spi platform device
400 * @info: ep93xx board specific spi master info (__initdata)
401 * @devices: SPI devices to register (__initdata)
402 * @num: number of SPI devices to register
403 *
404 * This function registers platform device for the EP93xx SPI controller and
405 * also makes sure that SPI pins are muxed so that I2S is not using those pins.
406 */
ep93xx_register_spi(struct ep93xx_spi_info * info,struct spi_board_info * devices,int num)407 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
408 struct spi_board_info *devices, int num)
409 {
410 /*
411 * When SPI is used, we need to make sure that I2S is muxed off from
412 * SPI pins.
413 */
414 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
415
416 ep93xx_spi_master_data = *info;
417 spi_register_board_info(devices, num);
418 platform_device_register(&ep93xx_spi_device);
419 }
420
421 /*************************************************************************
422 * EP93xx LEDs
423 *************************************************************************/
424 static const struct gpio_led ep93xx_led_pins[] __initconst = {
425 {
426 .name = "platform:grled",
427 .gpio = EP93XX_GPIO_LINE_GRLED,
428 }, {
429 .name = "platform:rdled",
430 .gpio = EP93XX_GPIO_LINE_RDLED,
431 },
432 };
433
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,
437 };
438
439 /*************************************************************************
440 * EP93xx pwm peripheral handling
441 *************************************************************************/
442 static struct resource ep93xx_pwm0_resource[] = {
443 DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10),
444 };
445
446 static struct platform_device ep93xx_pwm0_device = {
447 .name = "ep93xx-pwm",
448 .id = 0,
449 .num_resources = ARRAY_SIZE(ep93xx_pwm0_resource),
450 .resource = ep93xx_pwm0_resource,
451 };
452
453 static struct resource ep93xx_pwm1_resource[] = {
454 DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10),
455 };
456
457 static struct platform_device ep93xx_pwm1_device = {
458 .name = "ep93xx-pwm",
459 .id = 1,
460 .num_resources = ARRAY_SIZE(ep93xx_pwm1_resource),
461 .resource = ep93xx_pwm1_resource,
462 };
463
ep93xx_register_pwm(int pwm0,int pwm1)464 void __init ep93xx_register_pwm(int pwm0, int pwm1)
465 {
466 if (pwm0)
467 platform_device_register(&ep93xx_pwm0_device);
468
469 /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
470 if (pwm1)
471 platform_device_register(&ep93xx_pwm1_device);
472 }
473
ep93xx_pwm_acquire_gpio(struct platform_device * pdev)474 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
475 {
476 int err;
477
478 if (pdev->id == 0) {
479 err = 0;
480 } else if (pdev->id == 1) {
481 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
482 dev_name(&pdev->dev));
483 if (err)
484 return err;
485 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
486 if (err)
487 goto fail;
488
489 /* PWM 1 output on EGPIO[14] */
490 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
491 } else {
492 err = -ENODEV;
493 }
494
495 return err;
496
497 fail:
498 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
499 return err;
500 }
501 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
502
ep93xx_pwm_release_gpio(struct platform_device * pdev)503 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
504 {
505 if (pdev->id == 1) {
506 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
507 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
508
509 /* EGPIO[14] used for GPIO */
510 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
511 }
512 }
513 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
514
515
516 /*************************************************************************
517 * EP93xx video peripheral handling
518 *************************************************************************/
519 static struct ep93xxfb_mach_info ep93xxfb_data;
520
521 static struct resource ep93xx_fb_resource[] = {
522 DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800),
523 };
524
525 static struct platform_device ep93xx_fb_device = {
526 .name = "ep93xx-fb",
527 .id = -1,
528 .dev = {
529 .platform_data = &ep93xxfb_data,
530 .coherent_dma_mask = DMA_BIT_MASK(32),
531 .dma_mask = &ep93xx_fb_device.dev.coherent_dma_mask,
532 },
533 .num_resources = ARRAY_SIZE(ep93xx_fb_resource),
534 .resource = ep93xx_fb_resource,
535 };
536
537 /* The backlight use a single register in the framebuffer's register space */
538 #define EP93XX_RASTER_REG_BRIGHTNESS 0x20
539
540 static struct resource ep93xx_bl_resources[] = {
541 DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
542 EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
543 };
544
545 static struct platform_device ep93xx_bl_device = {
546 .name = "ep93xx-bl",
547 .id = -1,
548 .num_resources = ARRAY_SIZE(ep93xx_bl_resources),
549 .resource = ep93xx_bl_resources,
550 };
551
552 /**
553 * ep93xx_register_fb - Register the framebuffer platform device.
554 * @data: platform specific framebuffer configuration (__initdata)
555 */
ep93xx_register_fb(struct ep93xxfb_mach_info * data)556 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
557 {
558 ep93xxfb_data = *data;
559 platform_device_register(&ep93xx_fb_device);
560 platform_device_register(&ep93xx_bl_device);
561 }
562
563
564 /*************************************************************************
565 * EP93xx matrix keypad peripheral handling
566 *************************************************************************/
567 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
568
569 static struct resource ep93xx_keypad_resource[] = {
570 DEFINE_RES_MEM(EP93XX_KEY_MATRIX_PHYS_BASE, 0x0c),
571 DEFINE_RES_IRQ(IRQ_EP93XX_KEY),
572 };
573
574 static struct platform_device ep93xx_keypad_device = {
575 .name = "ep93xx-keypad",
576 .id = -1,
577 .dev = {
578 .platform_data = &ep93xx_keypad_data,
579 },
580 .num_resources = ARRAY_SIZE(ep93xx_keypad_resource),
581 .resource = ep93xx_keypad_resource,
582 };
583
584 /**
585 * ep93xx_register_keypad - Register the keypad platform device.
586 * @data: platform specific keypad configuration (__initdata)
587 */
ep93xx_register_keypad(struct ep93xx_keypad_platform_data * data)588 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
589 {
590 ep93xx_keypad_data = *data;
591 platform_device_register(&ep93xx_keypad_device);
592 }
593
ep93xx_keypad_acquire_gpio(struct platform_device * pdev)594 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
595 {
596 int err;
597 int i;
598
599 for (i = 0; i < 8; i++) {
600 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
601 if (err)
602 goto fail_gpio_c;
603 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
604 if (err)
605 goto fail_gpio_d;
606 }
607
608 /* Enable the keypad controller; GPIO ports C and D used for keypad */
609 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
610 EP93XX_SYSCON_DEVCFG_GONK);
611
612 return 0;
613
614 fail_gpio_d:
615 gpio_free(EP93XX_GPIO_LINE_C(i));
616 fail_gpio_c:
617 for (--i; i >= 0; --i) {
618 gpio_free(EP93XX_GPIO_LINE_C(i));
619 gpio_free(EP93XX_GPIO_LINE_D(i));
620 }
621 return err;
622 }
623 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
624
ep93xx_keypad_release_gpio(struct platform_device * pdev)625 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
626 {
627 int i;
628
629 for (i = 0; i < 8; i++) {
630 gpio_free(EP93XX_GPIO_LINE_C(i));
631 gpio_free(EP93XX_GPIO_LINE_D(i));
632 }
633
634 /* Disable the keypad controller; GPIO ports C and D used for GPIO */
635 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
636 EP93XX_SYSCON_DEVCFG_GONK);
637 }
638 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
639
640 /*************************************************************************
641 * EP93xx I2S audio peripheral handling
642 *************************************************************************/
643 static struct resource ep93xx_i2s_resource[] = {
644 DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
645 DEFINE_RES_IRQ(IRQ_EP93XX_SAI),
646 };
647
648 static struct platform_device ep93xx_i2s_device = {
649 .name = "ep93xx-i2s",
650 .id = -1,
651 .num_resources = ARRAY_SIZE(ep93xx_i2s_resource),
652 .resource = ep93xx_i2s_resource,
653 };
654
655 static struct platform_device ep93xx_pcm_device = {
656 .name = "ep93xx-pcm-audio",
657 .id = -1,
658 };
659
ep93xx_register_i2s(void)660 void __init ep93xx_register_i2s(void)
661 {
662 platform_device_register(&ep93xx_i2s_device);
663 platform_device_register(&ep93xx_pcm_device);
664 }
665
666 #define EP93XX_SYSCON_DEVCFG_I2S_MASK (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
667 EP93XX_SYSCON_DEVCFG_I2SONAC97)
668
669 #define EP93XX_I2SCLKDIV_MASK (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
670 EP93XX_SYSCON_I2SCLKDIV_SPOL)
671
ep93xx_i2s_acquire(void)672 int ep93xx_i2s_acquire(void)
673 {
674 unsigned val;
675
676 ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
677 EP93XX_SYSCON_DEVCFG_I2S_MASK);
678
679 /*
680 * This is potentially racy with the clock api for i2s_mclk, sclk and
681 * lrclk. Since the i2s driver is the only user of those clocks we
682 * rely on it to prevent parallel use of this function and the
683 * clock api for the i2s clocks.
684 */
685 val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
686 val &= ~EP93XX_I2SCLKDIV_MASK;
687 val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
688 ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
689
690 return 0;
691 }
692 EXPORT_SYMBOL(ep93xx_i2s_acquire);
693
ep93xx_i2s_release(void)694 void ep93xx_i2s_release(void)
695 {
696 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
697 }
698 EXPORT_SYMBOL(ep93xx_i2s_release);
699
700 /*************************************************************************
701 * EP93xx AC97 audio peripheral handling
702 *************************************************************************/
703 static struct resource ep93xx_ac97_resources[] = {
704 DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac),
705 DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR),
706 };
707
708 static struct platform_device ep93xx_ac97_device = {
709 .name = "ep93xx-ac97",
710 .id = -1,
711 .num_resources = ARRAY_SIZE(ep93xx_ac97_resources),
712 .resource = ep93xx_ac97_resources,
713 };
714
ep93xx_register_ac97(void)715 void __init ep93xx_register_ac97(void)
716 {
717 /*
718 * Make sure that the AC97 pins are not used by I2S.
719 */
720 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
721
722 platform_device_register(&ep93xx_ac97_device);
723 platform_device_register(&ep93xx_pcm_device);
724 }
725
726 /*************************************************************************
727 * EP93xx Watchdog
728 *************************************************************************/
729 static struct resource ep93xx_wdt_resources[] = {
730 DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
731 };
732
733 static struct platform_device ep93xx_wdt_device = {
734 .name = "ep93xx-wdt",
735 .id = -1,
736 .num_resources = ARRAY_SIZE(ep93xx_wdt_resources),
737 .resource = ep93xx_wdt_resources,
738 };
739
740 /*************************************************************************
741 * EP93xx IDE
742 *************************************************************************/
743 static struct resource ep93xx_ide_resources[] = {
744 DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38),
745 DEFINE_RES_IRQ(IRQ_EP93XX_EXT3),
746 };
747
748 static struct platform_device ep93xx_ide_device = {
749 .name = "ep93xx-ide",
750 .id = -1,
751 .dev = {
752 .dma_mask = &ep93xx_ide_device.dev.coherent_dma_mask,
753 .coherent_dma_mask = DMA_BIT_MASK(32),
754 },
755 .num_resources = ARRAY_SIZE(ep93xx_ide_resources),
756 .resource = ep93xx_ide_resources,
757 };
758
ep93xx_register_ide(void)759 void __init ep93xx_register_ide(void)
760 {
761 platform_device_register(&ep93xx_ide_device);
762 }
763
ep93xx_ide_acquire_gpio(struct platform_device * pdev)764 int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
765 {
766 int err;
767 int i;
768
769 err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
770 if (err)
771 return err;
772 err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
773 if (err)
774 goto fail_egpio15;
775 for (i = 2; i < 8; i++) {
776 err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
777 if (err)
778 goto fail_gpio_e;
779 }
780 for (i = 4; i < 8; i++) {
781 err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
782 if (err)
783 goto fail_gpio_g;
784 }
785 for (i = 0; i < 8; i++) {
786 err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
787 if (err)
788 goto fail_gpio_h;
789 }
790
791 /* GPIO ports E[7:2], G[7:4] and H used by IDE */
792 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
793 EP93XX_SYSCON_DEVCFG_GONIDE |
794 EP93XX_SYSCON_DEVCFG_HONIDE);
795 return 0;
796
797 fail_gpio_h:
798 for (--i; i >= 0; --i)
799 gpio_free(EP93XX_GPIO_LINE_H(i));
800 i = 8;
801 fail_gpio_g:
802 for (--i; i >= 4; --i)
803 gpio_free(EP93XX_GPIO_LINE_G(i));
804 i = 8;
805 fail_gpio_e:
806 for (--i; i >= 2; --i)
807 gpio_free(EP93XX_GPIO_LINE_E(i));
808 gpio_free(EP93XX_GPIO_LINE_EGPIO15);
809 fail_egpio15:
810 gpio_free(EP93XX_GPIO_LINE_EGPIO2);
811 return err;
812 }
813 EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
814
ep93xx_ide_release_gpio(struct platform_device * pdev)815 void ep93xx_ide_release_gpio(struct platform_device *pdev)
816 {
817 int i;
818
819 for (i = 2; i < 8; i++)
820 gpio_free(EP93XX_GPIO_LINE_E(i));
821 for (i = 4; i < 8; i++)
822 gpio_free(EP93XX_GPIO_LINE_G(i));
823 for (i = 0; i < 8; i++)
824 gpio_free(EP93XX_GPIO_LINE_H(i));
825 gpio_free(EP93XX_GPIO_LINE_EGPIO15);
826 gpio_free(EP93XX_GPIO_LINE_EGPIO2);
827
828
829 /* GPIO ports E[7:2], G[7:4] and H used by GPIO */
830 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
831 EP93XX_SYSCON_DEVCFG_GONIDE |
832 EP93XX_SYSCON_DEVCFG_HONIDE);
833 }
834 EXPORT_SYMBOL(ep93xx_ide_release_gpio);
835
836 /*************************************************************************
837 * EP93xx ADC
838 *************************************************************************/
839 static struct resource ep93xx_adc_resources[] = {
840 DEFINE_RES_MEM(EP93XX_ADC_PHYS_BASE, 0x28),
841 DEFINE_RES_IRQ(IRQ_EP93XX_TOUCH),
842 };
843
844 static struct platform_device ep93xx_adc_device = {
845 .name = "ep93xx-adc",
846 .id = -1,
847 .num_resources = ARRAY_SIZE(ep93xx_adc_resources),
848 .resource = ep93xx_adc_resources,
849 };
850
ep93xx_register_adc(void)851 void __init ep93xx_register_adc(void)
852 {
853 /* Power up ADC, deactivate Touch Screen Controller */
854 ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_TIN,
855 EP93XX_SYSCON_DEVCFG_ADCPD);
856
857 platform_device_register(&ep93xx_adc_device);
858 }
859
860 /*************************************************************************
861 * EP93xx Security peripheral
862 *************************************************************************/
863
864 /*
865 * The Maverick Key is 256 bits of micro fuses blown at the factory during
866 * manufacturing to uniquely identify a part.
867 *
868 * See: http://arm.cirrus.com/forum/viewtopic.php?t=486&highlight=maverick+key
869 */
870 #define EP93XX_SECURITY_REG(x) (EP93XX_SECURITY_BASE + (x))
871 #define EP93XX_SECURITY_SECFLG EP93XX_SECURITY_REG(0x2400)
872 #define EP93XX_SECURITY_FUSEFLG EP93XX_SECURITY_REG(0x2410)
873 #define EP93XX_SECURITY_UNIQID EP93XX_SECURITY_REG(0x2440)
874 #define EP93XX_SECURITY_UNIQCHK EP93XX_SECURITY_REG(0x2450)
875 #define EP93XX_SECURITY_UNIQVAL EP93XX_SECURITY_REG(0x2460)
876 #define EP93XX_SECURITY_SECID1 EP93XX_SECURITY_REG(0x2500)
877 #define EP93XX_SECURITY_SECID2 EP93XX_SECURITY_REG(0x2504)
878 #define EP93XX_SECURITY_SECCHK1 EP93XX_SECURITY_REG(0x2520)
879 #define EP93XX_SECURITY_SECCHK2 EP93XX_SECURITY_REG(0x2524)
880 #define EP93XX_SECURITY_UNIQID2 EP93XX_SECURITY_REG(0x2700)
881 #define EP93XX_SECURITY_UNIQID3 EP93XX_SECURITY_REG(0x2704)
882 #define EP93XX_SECURITY_UNIQID4 EP93XX_SECURITY_REG(0x2708)
883 #define EP93XX_SECURITY_UNIQID5 EP93XX_SECURITY_REG(0x270c)
884
885 static char ep93xx_soc_id[33];
886
ep93xx_get_soc_id(void)887 static const char __init *ep93xx_get_soc_id(void)
888 {
889 unsigned int id, id2, id3, id4, id5;
890
891 if (__raw_readl(EP93XX_SECURITY_UNIQVAL) != 1)
892 return "bad Hamming code";
893
894 id = __raw_readl(EP93XX_SECURITY_UNIQID);
895 id2 = __raw_readl(EP93XX_SECURITY_UNIQID2);
896 id3 = __raw_readl(EP93XX_SECURITY_UNIQID3);
897 id4 = __raw_readl(EP93XX_SECURITY_UNIQID4);
898 id5 = __raw_readl(EP93XX_SECURITY_UNIQID5);
899
900 if (id != id2)
901 return "invalid";
902
903 /* Toss the unique ID into the entropy pool */
904 add_device_randomness(&id2, 4);
905 add_device_randomness(&id3, 4);
906 add_device_randomness(&id4, 4);
907 add_device_randomness(&id5, 4);
908
909 snprintf(ep93xx_soc_id, sizeof(ep93xx_soc_id),
910 "%08x%08x%08x%08x", id2, id3, id4, id5);
911
912 return ep93xx_soc_id;
913 }
914
ep93xx_get_soc_rev(void)915 static const char __init *ep93xx_get_soc_rev(void)
916 {
917 int rev = ep93xx_chip_revision();
918
919 switch (rev) {
920 case EP93XX_CHIP_REV_D0:
921 return "D0";
922 case EP93XX_CHIP_REV_D1:
923 return "D1";
924 case EP93XX_CHIP_REV_E0:
925 return "E0";
926 case EP93XX_CHIP_REV_E1:
927 return "E1";
928 case EP93XX_CHIP_REV_E2:
929 return "E2";
930 default:
931 return "unknown";
932 }
933 }
934
ep93xx_get_machine_name(void)935 static const char __init *ep93xx_get_machine_name(void)
936 {
937 return kasprintf(GFP_KERNEL,"%s", machine_desc->name);
938 }
939
ep93xx_init_soc(void)940 static struct device __init *ep93xx_init_soc(void)
941 {
942 struct soc_device_attribute *soc_dev_attr;
943 struct soc_device *soc_dev;
944
945 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
946 if (!soc_dev_attr)
947 return NULL;
948
949 soc_dev_attr->machine = ep93xx_get_machine_name();
950 soc_dev_attr->family = "Cirrus Logic EP93xx";
951 soc_dev_attr->revision = ep93xx_get_soc_rev();
952 soc_dev_attr->soc_id = ep93xx_get_soc_id();
953
954 soc_dev = soc_device_register(soc_dev_attr);
955 if (IS_ERR(soc_dev)) {
956 kfree(soc_dev_attr->machine);
957 kfree(soc_dev_attr);
958 return NULL;
959 }
960
961 return soc_device_to_device(soc_dev);
962 }
963
ep93xx_init_devices(void)964 struct device __init *ep93xx_init_devices(void)
965 {
966 struct device *parent;
967
968 /* Disallow access to MaverickCrunch initially */
969 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
970
971 /* Default all ports to GPIO */
972 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
973 EP93XX_SYSCON_DEVCFG_GONK |
974 EP93XX_SYSCON_DEVCFG_EONIDE |
975 EP93XX_SYSCON_DEVCFG_GONIDE |
976 EP93XX_SYSCON_DEVCFG_HONIDE);
977
978 parent = ep93xx_init_soc();
979
980 /* Get the GPIO working early, other devices need it */
981 platform_device_register(&ep93xx_gpio_device);
982
983 amba_device_register(&uart1_device, &iomem_resource);
984 amba_device_register(&uart2_device, &iomem_resource);
985 amba_device_register(&uart3_device, &iomem_resource);
986
987 platform_device_register(&ep93xx_rtc_device);
988 platform_device_register(&ep93xx_ohci_device);
989 platform_device_register(&ep93xx_wdt_device);
990
991 gpio_led_register_device(-1, &ep93xx_led_data);
992
993 return parent;
994 }
995
ep93xx_restart(enum reboot_mode mode,const char * cmd)996 void ep93xx_restart(enum reboot_mode mode, const char *cmd)
997 {
998 /*
999 * Set then clear the SWRST bit to initiate a software reset
1000 */
1001 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
1002 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
1003
1004 while (1)
1005 ;
1006 }
1007
ep93xx_init_late(void)1008 void __init ep93xx_init_late(void)
1009 {
1010 crunch_init();
1011 }
1012
