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TOMOYO Linux Cross Reference
Linux/arch/arm/mach-pxa/pcm990-baseboard.c

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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 
 71 static u8 pcm990_cpld_readb(unsigned int reg)
 72 {
 73         return readb(pcm990_cpld_base + reg);
 74 }
 75 
 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
 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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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  */
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 

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