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1 /*
2  *  arch/arm/mach-pxa/pcm990-baseboard.c
3  *  Support for the Phytec phyCORE-PXA270 Development Platform (PCM-990).
4  *
5  *  Refer
6  *   http://www.phytec.com/products/rdk/ARM-XScale/phyCORE-XScale-PXA270.html
7  *  for additional hardware info
8  *
9  *  Author:	Juergen Kilb
10  *  Created:	April 05, 2005
11  *  Copyright:	Phytec Messtechnik GmbH
12  *  e-Mail:	armlinux@phytec.de
13  *
14  *  based on Intel Mainstone Board
15  *
16  *  Copyright 2007 Juergen Beisert @ Pengutronix (j.beisert@pengutronix.de)
17  *
18  *  This program is free software; you can redistribute it and/or modify
19  *  it under the terms of the GNU General Public License version 2 as
20  *  published by the Free Software Foundation.
21  */
22 #include <linux/gpio.h>
23 #include <linux/irq.h>
24 #include <linux/platform_device.h>
25 #include <linux/i2c.h>
26 #include <linux/i2c/pxa-i2c.h>
27 #include <linux/pwm_backlight.h>
28 
29 #include <media/mt9v022.h>
30 #include <media/soc_camera.h>
31 
32 #include <linux/platform_data/camera-pxa.h>
33 #include <asm/mach/map.h>
34 #include <mach/pxa27x.h>
35 #include <mach/audio.h>
36 #include <linux/platform_data/mmc-pxamci.h>
37 #include <linux/platform_data/usb-ohci-pxa27x.h>
38 #include <mach/pcm990_baseboard.h>
39 #include <linux/platform_data/video-pxafb.h>
40 
41 #include "devices.h"
42 #include "generic.h"
43 
44 static unsigned long pcm990_pin_config[] __initdata = {
45 	/* MMC */
46 	GPIO32_MMC_CLK,
47 	GPIO112_MMC_CMD,
48 	GPIO92_MMC_DAT_0,
49 	GPIO109_MMC_DAT_1,
50 	GPIO110_MMC_DAT_2,
51 	GPIO111_MMC_DAT_3,
52 	/* USB */
53 	GPIO88_USBH1_PWR,
54 	GPIO89_USBH1_PEN,
55 	/* PWM0 */
56 	GPIO16_PWM0_OUT,
57 
58 	/* I2C */
59 	GPIO117_I2C_SCL,
60 	GPIO118_I2C_SDA,
61 
62 	/* AC97 */
63 	GPIO28_AC97_BITCLK,
64 	GPIO29_AC97_SDATA_IN_0,
65 	GPIO30_AC97_SDATA_OUT,
66 	GPIO31_AC97_SYNC,
67 };
68 
69 static void __iomem *pcm990_cpld_base;
70 
pcm990_cpld_readb(unsigned int reg)71 static u8 pcm990_cpld_readb(unsigned int reg)
72 {
73 	return readb(pcm990_cpld_base + reg);
74 }
75 
pcm990_cpld_writeb(u8 value,unsigned int reg)76 static void pcm990_cpld_writeb(u8 value, unsigned int reg)
77 {
78 	writeb(value, pcm990_cpld_base + reg);
79 }
80 
81 /*
82  * pcm990_lcd_power - control power supply to the LCD
83  * @on: 0 = switch off, 1 = switch on
84  *
85  * Called by the pxafb driver
86  */
87 #ifndef CONFIG_PCM990_DISPLAY_NONE
pcm990_lcd_power(int on,struct fb_var_screeninfo * var)88 static void pcm990_lcd_power(int on, struct fb_var_screeninfo *var)
89 {
90 	if (on) {
91 		/* enable LCD-Latches
92 		 * power on LCD
93 		 */
94 		pcm990_cpld_writeb(PCM990_CTRL_LCDPWR + PCM990_CTRL_LCDON,
95 				PCM990_CTRL_REG3);
96 	} else {
97 		/* disable LCD-Latches
98 		 * power off LCD
99 		 */
100 		pcm990_cpld_writeb(0, PCM990_CTRL_REG3);
101 	}
102 }
103 #endif
104 
105 #if defined(CONFIG_PCM990_DISPLAY_SHARP)
106 static struct pxafb_mode_info fb_info_sharp_lq084v1dg21 = {
107 	.pixclock		= 28000,
108 	.xres			= 640,
109 	.yres			= 480,
110 	.bpp			= 16,
111 	.hsync_len		= 20,
112 	.left_margin		= 103,
113 	.right_margin		= 47,
114 	.vsync_len		= 6,
115 	.upper_margin		= 28,
116 	.lower_margin		= 5,
117 	.sync			= 0,
118 	.cmap_greyscale		= 0,
119 };
120 
121 static struct pxafb_mach_info pcm990_fbinfo __initdata = {
122 	.modes			= &fb_info_sharp_lq084v1dg21,
123 	.num_modes		= 1,
124 	.lcd_conn		= LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
125 	.pxafb_lcd_power	= pcm990_lcd_power,
126 };
127 #elif defined(CONFIG_PCM990_DISPLAY_NEC)
128 struct pxafb_mode_info fb_info_nec_nl6448bc20_18d = {
129 	.pixclock		= 39720,
130 	.xres			= 640,
131 	.yres			= 480,
132 	.bpp			= 16,
133 	.hsync_len		= 32,
134 	.left_margin		= 16,
135 	.right_margin		= 48,
136 	.vsync_len		= 2,
137 	.upper_margin		= 12,
138 	.lower_margin		= 17,
139 	.sync			= 0,
140 	.cmap_greyscale		= 0,
141 };
142 
143 static struct pxafb_mach_info pcm990_fbinfo __initdata = {
144 	.modes			= &fb_info_nec_nl6448bc20_18d,
145 	.num_modes		= 1,
146 	.lcd_conn		= LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
147 	.pxafb_lcd_power	= pcm990_lcd_power,
148 };
149 #endif
150 
151 static struct platform_pwm_backlight_data pcm990_backlight_data = {
152 	.pwm_id		= 0,
153 	.max_brightness	= 1023,
154 	.dft_brightness	= 1023,
155 	.pwm_period_ns	= 78770,
156 	.enable_gpio	= -1,
157 };
158 
159 static struct platform_device pcm990_backlight_device = {
160 	.name		= "pwm-backlight",
161 	.dev		= {
162 		.parent = &pxa27x_device_pwm0.dev,
163 		.platform_data = &pcm990_backlight_data,
164 	},
165 };
166 
167 /*
168  * The PCM-990 development baseboard uses PCM-027's hardware in the
169  * following way:
170  *
171  * - LCD support is in use
172  *  - GPIO16 is output for back light on/off with PWM
173  *  - GPIO58 ... GPIO73 are outputs for display data
174  *  - GPIO74 is output output for LCDFCLK
175  *  - GPIO75 is output for LCDLCLK
176  *  - GPIO76 is output for LCDPCLK
177  *  - GPIO77 is output for LCDBIAS
178  * - MMC support is in use
179  *  - GPIO32 is output for MMCCLK
180  *  - GPIO92 is MMDAT0
181  *  - GPIO109 is MMDAT1
182  *  - GPIO110 is MMCS0
183  *  - GPIO111 is MMCS1
184  *  - GPIO112 is MMCMD
185  * - IDE/CF card is in use
186  *  - GPIO48 is output /POE
187  *  - GPIO49 is output /PWE
188  *  - GPIO50 is output /PIOR
189  *  - GPIO51 is output /PIOW
190  *  - GPIO54 is output /PCE2
191  *  - GPIO55 is output /PREG
192  *  - GPIO56 is input /PWAIT
193  *  - GPIO57 is output /PIOS16
194  *  - GPIO79 is output PSKTSEL
195  *  - GPIO85 is output /PCE1
196  * - FFUART is in use
197  *  - GPIO34 is input FFRXD
198  *  - GPIO35 is input FFCTS
199  *  - GPIO36 is input FFDCD
200  *  - GPIO37 is input FFDSR
201  *  - GPIO38 is input FFRI
202  *  - GPIO39 is output FFTXD
203  *  - GPIO40 is output FFDTR
204  *  - GPIO41 is output FFRTS
205  * - BTUART is in use
206  *  - GPIO42 is input BTRXD
207  *  - GPIO43 is output BTTXD
208  *  - GPIO44 is input BTCTS
209  *  - GPIO45 is output BTRTS
210  * - IRUART is in use
211  *  - GPIO46 is input STDRXD
212  *  - GPIO47 is output STDTXD
213  * - AC97 is in use*)
214  *  - GPIO28 is input AC97CLK
215  *  - GPIO29 is input AC97DatIn
216  *  - GPIO30 is output AC97DatO
217  *  - GPIO31 is output AC97SYNC
218  *  - GPIO113 is output AC97_RESET
219  * - SSP is in use
220  *  - GPIO23 is output SSPSCLK
221  *  - GPIO24 is output chip select to Max7301
222  *  - GPIO25 is output SSPTXD
223  *  - GPIO26 is input SSPRXD
224  *  - GPIO27 is input for Max7301 IRQ
225  *  - GPIO53 is input SSPSYSCLK
226  * - SSP3 is in use
227  *  - GPIO81 is output SSPTXD3
228  *  - GPIO82 is input SSPRXD3
229  *  - GPIO83 is output SSPSFRM
230  *  - GPIO84 is output SSPCLK3
231  *
232  * Otherwise claimed GPIOs:
233  * GPIO1 -> IRQ from user switch
234  * GPIO9 -> IRQ from power management
235  * GPIO10 -> IRQ from WML9712 AC97 controller
236  * GPIO11 -> IRQ from IDE controller
237  * GPIO12 -> IRQ from CF controller
238  * GPIO13 -> IRQ from CF controller
239  * GPIO14 -> GPIO free
240  * GPIO15 -> /CS1 selects baseboard's Control CPLD (U7, 16 bit wide data path)
241  * GPIO19 -> GPIO free
242  * GPIO20 -> /SDCS2
243  * GPIO21 -> /CS3 PC card socket select
244  * GPIO33 -> /CS5  network controller select
245  * GPIO78 -> /CS2  (16 bit wide data path)
246  * GPIO80 -> /CS4  (16 bit wide data path)
247  * GPIO86 -> GPIO free
248  * GPIO87 -> GPIO free
249  * GPIO90 -> LED0 on CPU module
250  * GPIO91 -> LED1 on CPI module
251  * GPIO117 -> SCL
252  * GPIO118 -> SDA
253  */
254 
255 static unsigned long pcm990_irq_enabled;
256 
pcm990_mask_ack_irq(struct irq_data * d)257 static void pcm990_mask_ack_irq(struct irq_data *d)
258 {
259 	int pcm990_irq = (d->irq - PCM027_IRQ(0));
260 
261 	pcm990_irq_enabled &= ~(1 << pcm990_irq);
262 
263 	pcm990_cpld_writeb(pcm990_irq_enabled, PCM990_CTRL_INTMSKENA);
264 }
265 
pcm990_unmask_irq(struct irq_data * d)266 static void pcm990_unmask_irq(struct irq_data *d)
267 {
268 	int pcm990_irq = (d->irq - PCM027_IRQ(0));
269 	u8 val;
270 
271 	/* the irq can be acknowledged only if deasserted, so it's done here */
272 
273 	pcm990_irq_enabled |= (1 << pcm990_irq);
274 
275 	val = pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
276 	val |= 1 << pcm990_irq;
277 	pcm990_cpld_writeb(val, PCM990_CTRL_INTSETCLR);
278 
279 	pcm990_cpld_writeb(pcm990_irq_enabled, PCM990_CTRL_INTMSKENA);
280 }
281 
282 static struct irq_chip pcm990_irq_chip = {
283 	.irq_mask_ack	= pcm990_mask_ack_irq,
284 	.irq_unmask	= pcm990_unmask_irq,
285 };
286 
pcm990_irq_handler(unsigned int irq,struct irq_desc * desc)287 static void pcm990_irq_handler(unsigned int irq, struct irq_desc *desc)
288 {
289 	unsigned long pending;
290 
291 	pending = ~pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
292 	pending &= pcm990_irq_enabled;
293 
294 	do {
295 		/* clear our parent IRQ */
296 		desc->irq_data.chip->irq_ack(&desc->irq_data);
297 		if (likely(pending)) {
298 			irq = PCM027_IRQ(0) + __ffs(pending);
299 			generic_handle_irq(irq);
300 		}
301 		pending = ~pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
302 		pending &= pcm990_irq_enabled;
303 	} while (pending);
304 }
305 
pcm990_init_irq(void)306 static void __init pcm990_init_irq(void)
307 {
308 	int irq;
309 
310 	/* setup extra PCM990 irqs */
311 	for (irq = PCM027_IRQ(0); irq <= PCM027_IRQ(3); irq++) {
312 		irq_set_chip_and_handler(irq, &pcm990_irq_chip,
313 					 handle_level_irq);
314 		set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
315 	}
316 
317 	/* disable all Interrupts */
318 	pcm990_cpld_writeb(0x0, PCM990_CTRL_INTMSKENA);
319 	pcm990_cpld_writeb(0xff, PCM990_CTRL_INTSETCLR);
320 
321 	irq_set_chained_handler(PCM990_CTRL_INT_IRQ, pcm990_irq_handler);
322 	irq_set_irq_type(PCM990_CTRL_INT_IRQ, PCM990_CTRL_INT_IRQ_EDGE);
323 }
324 
pcm990_mci_init(struct device * dev,irq_handler_t mci_detect_int,void * data)325 static int pcm990_mci_init(struct device *dev, irq_handler_t mci_detect_int,
326 			void *data)
327 {
328 	int err;
329 
330 	err = request_irq(PCM027_MMCDET_IRQ, mci_detect_int, 0,
331 			     "MMC card detect", data);
332 	if (err)
333 		printk(KERN_ERR "pcm990_mci_init: MMC/SD: can't request MMC "
334 				"card detect IRQ\n");
335 
336 	return err;
337 }
338 
pcm990_mci_setpower(struct device * dev,unsigned int vdd)339 static int pcm990_mci_setpower(struct device *dev, unsigned int vdd)
340 {
341 	struct pxamci_platform_data *p_d = dev->platform_data;
342 	u8 val;
343 
344 	val = pcm990_cpld_readb(PCM990_CTRL_REG5);
345 
346 	if ((1 << vdd) & p_d->ocr_mask)
347 		val |= PCM990_CTRL_MMC2PWR;
348 	else
349 		val &= ~PCM990_CTRL_MMC2PWR;
350 
351 	pcm990_cpld_writeb(PCM990_CTRL_MMC2PWR, PCM990_CTRL_REG5);
352 	return 0;
353 }
354 
pcm990_mci_exit(struct device * dev,void * data)355 static void pcm990_mci_exit(struct device *dev, void *data)
356 {
357 	free_irq(PCM027_MMCDET_IRQ, data);
358 }
359 
360 #define MSECS_PER_JIFFY (1000/HZ)
361 
362 static struct pxamci_platform_data pcm990_mci_platform_data = {
363 	.detect_delay_ms	= 250,
364 	.ocr_mask		= MMC_VDD_32_33 | MMC_VDD_33_34,
365 	.init 			= pcm990_mci_init,
366 	.setpower 		= pcm990_mci_setpower,
367 	.exit			= pcm990_mci_exit,
368 	.gpio_card_detect	= -1,
369 	.gpio_card_ro		= -1,
370 	.gpio_power		= -1,
371 };
372 
373 static struct pxaohci_platform_data pcm990_ohci_platform_data = {
374 	.port_mode	= PMM_PERPORT_MODE,
375 	.flags		= ENABLE_PORT1 | POWER_CONTROL_LOW | POWER_SENSE_LOW,
376 	.power_on_delay	= 10,
377 };
378 
379 /*
380  * PXA27x Camera specific stuff
381  */
382 #if defined(CONFIG_VIDEO_PXA27x) || defined(CONFIG_VIDEO_PXA27x_MODULE)
383 static unsigned long pcm990_camera_pin_config[] = {
384 	/* CIF */
385 	GPIO98_CIF_DD_0,
386 	GPIO105_CIF_DD_1,
387 	GPIO104_CIF_DD_2,
388 	GPIO103_CIF_DD_3,
389 	GPIO95_CIF_DD_4,
390 	GPIO94_CIF_DD_5,
391 	GPIO93_CIF_DD_6,
392 	GPIO108_CIF_DD_7,
393 	GPIO107_CIF_DD_8,
394 	GPIO106_CIF_DD_9,
395 	GPIO42_CIF_MCLK,
396 	GPIO45_CIF_PCLK,
397 	GPIO43_CIF_FV,
398 	GPIO44_CIF_LV,
399 };
400 
401 /*
402  * CICR4: PCLK_EN:	Pixel clock is supplied by the sensor
403  *	MCLK_EN:	Master clock is generated by PXA
404  *	PCP:		Data sampled on the falling edge of pixel clock
405  */
406 struct pxacamera_platform_data pcm990_pxacamera_platform_data = {
407 	.flags  = PXA_CAMERA_MASTER | PXA_CAMERA_DATAWIDTH_8 | PXA_CAMERA_DATAWIDTH_10 |
408 		PXA_CAMERA_PCLK_EN | PXA_CAMERA_MCLK_EN/* | PXA_CAMERA_PCP*/,
409 	.mclk_10khz = 1000,
410 };
411 
412 #include <linux/platform_data/pca953x.h>
413 
414 static struct pca953x_platform_data pca9536_data = {
415 	.gpio_base	= PXA_NR_BUILTIN_GPIO,
416 };
417 
418 static int gpio_bus_switch = -EINVAL;
419 
pcm990_camera_set_bus_param(struct soc_camera_link * link,unsigned long flags)420 static int pcm990_camera_set_bus_param(struct soc_camera_link *link,
421 				       unsigned long flags)
422 {
423 	if (gpio_bus_switch < 0) {
424 		if (flags == SOCAM_DATAWIDTH_10)
425 			return 0;
426 		else
427 			return -EINVAL;
428 	}
429 
430 	if (flags & SOCAM_DATAWIDTH_8)
431 		gpio_set_value_cansleep(gpio_bus_switch, 1);
432 	else
433 		gpio_set_value_cansleep(gpio_bus_switch, 0);
434 
435 	return 0;
436 }
437 
pcm990_camera_query_bus_param(struct soc_camera_link * link)438 static unsigned long pcm990_camera_query_bus_param(struct soc_camera_link *link)
439 {
440 	int ret;
441 
442 	if (gpio_bus_switch < 0) {
443 		ret = gpio_request(PXA_NR_BUILTIN_GPIO, "camera");
444 		if (!ret) {
445 			gpio_bus_switch = PXA_NR_BUILTIN_GPIO;
446 			gpio_direction_output(gpio_bus_switch, 0);
447 		}
448 	}
449 
450 	if (gpio_bus_switch >= 0)
451 		return SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_10;
452 	else
453 		return SOCAM_DATAWIDTH_10;
454 }
455 
pcm990_camera_free_bus(struct soc_camera_link * link)456 static void pcm990_camera_free_bus(struct soc_camera_link *link)
457 {
458 	if (gpio_bus_switch < 0)
459 		return;
460 
461 	gpio_free(gpio_bus_switch);
462 	gpio_bus_switch = -EINVAL;
463 }
464 
465 /* Board I2C devices. */
466 static struct i2c_board_info __initdata pcm990_i2c_devices[] = {
467 	{
468 		/* Must initialize before the camera(s) */
469 		I2C_BOARD_INFO("pca9536", 0x41),
470 		.platform_data = &pca9536_data,
471 	},
472 };
473 
474 static struct mt9v022_platform_data mt9v022_pdata = {
475 	.y_skip_top = 1,
476 };
477 
478 static struct i2c_board_info pcm990_camera_i2c[] = {
479 	{
480 		I2C_BOARD_INFO("mt9v022", 0x48),
481 	}, {
482 		I2C_BOARD_INFO("mt9m001", 0x5d),
483 	},
484 };
485 
486 static struct soc_camera_link iclink[] = {
487 	{
488 		.bus_id			= 0, /* Must match with the camera ID */
489 		.board_info		= &pcm990_camera_i2c[0],
490 		.priv			= &mt9v022_pdata,
491 		.i2c_adapter_id		= 0,
492 		.query_bus_param	= pcm990_camera_query_bus_param,
493 		.set_bus_param		= pcm990_camera_set_bus_param,
494 		.free_bus		= pcm990_camera_free_bus,
495 	}, {
496 		.bus_id			= 0, /* Must match with the camera ID */
497 		.board_info		= &pcm990_camera_i2c[1],
498 		.i2c_adapter_id		= 0,
499 		.query_bus_param	= pcm990_camera_query_bus_param,
500 		.set_bus_param		= pcm990_camera_set_bus_param,
501 		.free_bus		= pcm990_camera_free_bus,
502 	},
503 };
504 
505 static struct platform_device pcm990_camera[] = {
506 	{
507 		.name	= "soc-camera-pdrv",
508 		.id	= 0,
509 		.dev	= {
510 			.platform_data = &iclink[0],
511 		},
512 	}, {
513 		.name	= "soc-camera-pdrv",
514 		.id	= 1,
515 		.dev	= {
516 			.platform_data = &iclink[1],
517 		},
518 	},
519 };
520 #endif /* CONFIG_VIDEO_PXA27x ||CONFIG_VIDEO_PXA27x_MODULE */
521 
522 /*
523  * system init for baseboard usage. Will be called by pcm027 init.
524  *
525  * Add platform devices present on this baseboard and init
526  * them from CPU side as far as required to use them later on
527  */
pcm990_baseboard_init(void)528 void __init pcm990_baseboard_init(void)
529 {
530 	pxa2xx_mfp_config(ARRAY_AND_SIZE(pcm990_pin_config));
531 
532 	pcm990_cpld_base = ioremap(PCM990_CTRL_PHYS, PCM990_CTRL_SIZE);
533 	if (!pcm990_cpld_base) {
534 		pr_err("pcm990: failed to ioremap cpld\n");
535 		return;
536 	}
537 
538 	/* register CPLD's IRQ controller */
539 	pcm990_init_irq();
540 
541 #ifndef CONFIG_PCM990_DISPLAY_NONE
542 	pxa_set_fb_info(NULL, &pcm990_fbinfo);
543 #endif
544 	platform_device_register(&pcm990_backlight_device);
545 
546 	/* MMC */
547 	pxa_set_mci_info(&pcm990_mci_platform_data);
548 
549 	/* USB host */
550 	pxa_set_ohci_info(&pcm990_ohci_platform_data);
551 
552 	pxa_set_i2c_info(NULL);
553 	pxa_set_ac97_info(NULL);
554 
555 #if defined(CONFIG_VIDEO_PXA27x) || defined(CONFIG_VIDEO_PXA27x_MODULE)
556 	pxa2xx_mfp_config(ARRAY_AND_SIZE(pcm990_camera_pin_config));
557 	pxa_set_camera_info(&pcm990_pxacamera_platform_data);
558 
559 	i2c_register_board_info(0, ARRAY_AND_SIZE(pcm990_i2c_devices));
560 
561 	platform_device_register(&pcm990_camera[0]);
562 	platform_device_register(&pcm990_camera[1]);
563 #endif
564 
565 	printk(KERN_INFO "PCM-990 Evaluation baseboard initialized\n");
566 }
567