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pcm990-baseboard.c

/*
 *  arch/arm/mach-pxa/pcm990-baseboard.c
 *  Support for the Phytec phyCORE-PXA270 Development Platform (PCM-990).
 *
 *  Refer
 *   http://www.phytec.com/products/rdk/ARM-XScale/phyCORE-XScale-PXA270.html
 *  for additional hardware info
 *
 *  Author: Juergen Kilb
 *  Created:      April 05, 2005
 *  Copyright:    Phytec Messtechnik GmbH
 *  e-Mail: armlinux@phytec.de
 *
 *  based on Intel Mainstone Board
 *
 *  Copyright 2007 Juergen Beisert @ Pengutronix (j.beisert@pengutronix.de)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */

#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/pwm_backlight.h>

#include <media/soc_camera.h>

#include <asm/gpio.h>
#include <mach/i2c.h>
#include <mach/camera.h>
#include <asm/mach/map.h>
#include <mach/pxa-regs.h>
#include <mach/audio.h>
#include <mach/mmc.h>
#include <mach/ohci.h>
#include <mach/pcm990_baseboard.h>
#include <mach/pxafb.h>
#include <mach/mfp-pxa27x.h>

#include "devices.h"
#include "generic.h"

static unsigned long pcm990_pin_config[] __initdata = {
      /* MMC */
      GPIO32_MMC_CLK,
      GPIO112_MMC_CMD,
      GPIO92_MMC_DAT_0,
      GPIO109_MMC_DAT_1,
      GPIO110_MMC_DAT_2,
      GPIO111_MMC_DAT_3,
      /* USB */
      GPIO88_USBH1_PWR,
      GPIO89_USBH1_PEN,
      /* PWM0 */
      GPIO16_PWM0_OUT,
};

/*
 * pcm990_lcd_power - control power supply to the LCD
 * @on: 0 = switch off, 1 = switch on
 *
 * Called by the pxafb driver
 */
#ifndef CONFIG_PCM990_DISPLAY_NONE
static void pcm990_lcd_power(int on, struct fb_var_screeninfo *var)
{
      if (on) {
            /* enable LCD-Latches
             * power on LCD
             */
            __PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG3) =
                  PCM990_CTRL_LCDPWR + PCM990_CTRL_LCDON;
      } else {
            /* disable LCD-Latches
             * power off LCD
             */
            __PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG3) = 0x00;
      }
}
#endif

#if defined(CONFIG_PCM990_DISPLAY_SHARP)
static struct pxafb_mode_info fb_info_sharp_lq084v1dg21 = {
      .pixclock         = 28000,
      .xres             = 640,
      .yres             = 480,
      .bpp              = 16,
      .hsync_len        = 20,
      .left_margin            = 103,
      .right_margin           = 47,
      .vsync_len        = 6,
      .upper_margin           = 28,
      .lower_margin           = 5,
      .sync             = 0,
      .cmap_greyscale         = 0,
};

static struct pxafb_mach_info pcm990_fbinfo __initdata = {
      .modes                  = &fb_info_sharp_lq084v1dg21,
      .num_modes        = 1,
      .lccr0                  = LCCR0_PAS,
      .lccr3                  = LCCR3_PCP,
      .pxafb_lcd_power  = pcm990_lcd_power,
};
#elif defined(CONFIG_PCM990_DISPLAY_NEC)
struct pxafb_mode_info fb_info_nec_nl6448bc20_18d = {
      .pixclock         = 39720,
      .xres             = 640,
      .yres             = 480,
      .bpp              = 16,
      .hsync_len        = 32,
      .left_margin            = 16,
      .right_margin           = 48,
      .vsync_len        = 2,
      .upper_margin           = 12,
      .lower_margin           = 17,
      .sync             = 0,
      .cmap_greyscale         = 0,
};

static struct pxafb_mach_info pcm990_fbinfo __initdata = {
      .modes                  = &fb_info_nec_nl6448bc20_18d,
      .num_modes        = 1,
      .lccr0                  = LCCR0_Act,
      .lccr3                  = LCCR3_PixFlEdg,
      .pxafb_lcd_power  = pcm990_lcd_power,
};
#endif

static struct platform_pwm_backlight_data pcm990_backlight_data = {
      .pwm_id           = 0,
      .max_brightness   = 1023,
      .dft_brightness   = 1023,
      .pwm_period_ns    = 78770,
};

static struct platform_device pcm990_backlight_device = {
      .name       = "pwm-backlight",
      .dev        = {
            .parent = &pxa27x_device_pwm0.dev,
            .platform_data = &pcm990_backlight_data,
      },
};

/*
 * The PCM-990 development baseboard uses PCM-027's hardware in the
 * following way:
 *
 * - LCD support is in use
 *  - GPIO16 is output for back light on/off with PWM
 *  - GPIO58 ... GPIO73 are outputs for display data
 *  - GPIO74 is output output for LCDFCLK
 *  - GPIO75 is output for LCDLCLK
 *  - GPIO76 is output for LCDPCLK
 *  - GPIO77 is output for LCDBIAS
 * - MMC support is in use
 *  - GPIO32 is output for MMCCLK
 *  - GPIO92 is MMDAT0
 *  - GPIO109 is MMDAT1
 *  - GPIO110 is MMCS0
 *  - GPIO111 is MMCS1
 *  - GPIO112 is MMCMD
 * - IDE/CF card is in use
 *  - GPIO48 is output /POE
 *  - GPIO49 is output /PWE
 *  - GPIO50 is output /PIOR
 *  - GPIO51 is output /PIOW
 *  - GPIO54 is output /PCE2
 *  - GPIO55 is output /PREG
 *  - GPIO56 is input /PWAIT
 *  - GPIO57 is output /PIOS16
 *  - GPIO79 is output PSKTSEL
 *  - GPIO85 is output /PCE1
 * - FFUART is in use
 *  - GPIO34 is input FFRXD
 *  - GPIO35 is input FFCTS
 *  - GPIO36 is input FFDCD
 *  - GPIO37 is input FFDSR
 *  - GPIO38 is input FFRI
 *  - GPIO39 is output FFTXD
 *  - GPIO40 is output FFDTR
 *  - GPIO41 is output FFRTS
 * - BTUART is in use
 *  - GPIO42 is input BTRXD
 *  - GPIO43 is output BTTXD
 *  - GPIO44 is input BTCTS
 *  - GPIO45 is output BTRTS
 * - IRUART is in use
 *  - GPIO46 is input STDRXD
 *  - GPIO47 is output STDTXD
 * - AC97 is in use*)
 *  - GPIO28 is input AC97CLK
 *  - GPIO29 is input AC97DatIn
 *  - GPIO30 is output AC97DatO
 *  - GPIO31 is output AC97SYNC
 *  - GPIO113 is output AC97_RESET
 * - SSP is in use
 *  - GPIO23 is output SSPSCLK
 *  - GPIO24 is output chip select to Max7301
 *  - GPIO25 is output SSPTXD
 *  - GPIO26 is input SSPRXD
 *  - GPIO27 is input for Max7301 IRQ
 *  - GPIO53 is input SSPSYSCLK
 * - SSP3 is in use
 *  - GPIO81 is output SSPTXD3
 *  - GPIO82 is input SSPRXD3
 *  - GPIO83 is output SSPSFRM
 *  - GPIO84 is output SSPCLK3
 *
 * Otherwise claimed GPIOs:
 * GPIO1 -> IRQ from user switch
 * GPIO9 -> IRQ from power management
 * GPIO10 -> IRQ from WML9712 AC97 controller
 * GPIO11 -> IRQ from IDE controller
 * GPIO12 -> IRQ from CF controller
 * GPIO13 -> IRQ from CF controller
 * GPIO14 -> GPIO free
 * GPIO15 -> /CS1 selects baseboard's Control CPLD (U7, 16 bit wide data path)
 * GPIO19 -> GPIO free
 * GPIO20 -> /SDCS2
 * GPIO21 -> /CS3 PC card socket select
 * GPIO33 -> /CS5  network controller select
 * GPIO78 -> /CS2  (16 bit wide data path)
 * GPIO80 -> /CS4  (16 bit wide data path)
 * GPIO86 -> GPIO free
 * GPIO87 -> GPIO free
 * GPIO90 -> LED0 on CPU module
 * GPIO91 -> LED1 on CPI module
 * GPIO117 -> SCL
 * GPIO118 -> SDA
 */

static unsigned long pcm990_irq_enabled;

static void pcm990_mask_ack_irq(unsigned int irq)
{
      int pcm990_irq = (irq - PCM027_IRQ(0));
      PCM990_INTMSKENA = (pcm990_irq_enabled &= ~(1 << pcm990_irq));
}

static void pcm990_unmask_irq(unsigned int irq)
{
      int pcm990_irq = (irq - PCM027_IRQ(0));
      /* the irq can be acknowledged only if deasserted, so it's done here */
      PCM990_INTSETCLR |= 1 << pcm990_irq;
      PCM990_INTMSKENA  = (pcm990_irq_enabled |= (1 << pcm990_irq));
}

static struct irq_chip pcm990_irq_chip = {
      .mask_ack   = pcm990_mask_ack_irq,
      .unmask           = pcm990_unmask_irq,
};

static void pcm990_irq_handler(unsigned int irq, struct irq_desc *desc)
{
      unsigned long pending = (~PCM990_INTSETCLR) & pcm990_irq_enabled;

      do {
            GEDR(PCM990_CTRL_INT_IRQ_GPIO) =
                              GPIO_bit(PCM990_CTRL_INT_IRQ_GPIO);
            if (likely(pending)) {
                  irq = PCM027_IRQ(0) + __ffs(pending);
                  generic_handle_irq(irq);
            }
            pending = (~PCM990_INTSETCLR) & pcm990_irq_enabled;
      } while (pending);
}

static void __init pcm990_init_irq(void)
{
      int irq;

      /* setup extra PCM990 irqs */
      for (irq = PCM027_IRQ(0); irq <= PCM027_IRQ(3); irq++) {
            set_irq_chip(irq, &pcm990_irq_chip);
            set_irq_handler(irq, handle_level_irq);
            set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
      }

      PCM990_INTMSKENA = 0x00;      /* disable all Interrupts */
      PCM990_INTSETCLR = 0xFF;

      set_irq_chained_handler(PCM990_CTRL_INT_IRQ, pcm990_irq_handler);
      set_irq_type(PCM990_CTRL_INT_IRQ, PCM990_CTRL_INT_IRQ_EDGE);
}

static int pcm990_mci_init(struct device *dev, irq_handler_t mci_detect_int,
                  void *data)
{
      int err;

      err = request_irq(PCM027_MMCDET_IRQ, mci_detect_int, IRQF_DISABLED,
                       "MMC card detect", data);
      if (err)
            printk(KERN_ERR "pcm990_mci_init: MMC/SD: can't request MMC "
                        "card detect IRQ\n");

      return err;
}

static void pcm990_mci_setpower(struct device *dev, unsigned int vdd)
{
      struct pxamci_platform_data *p_d = dev->platform_data;

      if ((1 << vdd) & p_d->ocr_mask)
            __PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG5) =
                                    PCM990_CTRL_MMC2PWR;
      else
            __PCM990_CTRL_REG(PCM990_CTRL_PHYS + PCM990_CTRL_REG5) =
                                    ~PCM990_CTRL_MMC2PWR;
}

static void pcm990_mci_exit(struct device *dev, void *data)
{
      free_irq(PCM027_MMCDET_IRQ, data);
}

#define MSECS_PER_JIFFY (1000/HZ)

static struct pxamci_platform_data pcm990_mci_platform_data = {
      .detect_delay     = 250 / MSECS_PER_JIFFY,
      .ocr_mask   = MMC_VDD_32_33 | MMC_VDD_33_34,
      .init             = pcm990_mci_init,
      .setpower   = pcm990_mci_setpower,
      .exit       = pcm990_mci_exit,
};

static struct pxaohci_platform_data pcm990_ohci_platform_data = {
      .port_mode  = PMM_PERPORT_MODE,
      .flags            = ENABLE_PORT1 | POWER_CONTROL_LOW | POWER_SENSE_LOW,
      .power_on_delay   = 10,
};

/*
 * PXA27x Camera specific stuff
 */
#if defined(CONFIG_VIDEO_PXA27x) || defined(CONFIG_VIDEO_PXA27x_MODULE)
static unsigned long pcm990_camera_pin_config[] = {
      /* CIF */
      GPIO98_CIF_DD_0,
      GPIO105_CIF_DD_1,
      GPIO104_CIF_DD_2,
      GPIO103_CIF_DD_3,
      GPIO95_CIF_DD_4,
      GPIO94_CIF_DD_5,
      GPIO93_CIF_DD_6,
      GPIO108_CIF_DD_7,
      GPIO107_CIF_DD_8,
      GPIO106_CIF_DD_9,
      GPIO42_CIF_MCLK,
      GPIO45_CIF_PCLK,
      GPIO43_CIF_FV,
      GPIO44_CIF_LV,
};

static int pcm990_pxacamera_init(struct device *dev)
{
      pxa2xx_mfp_config(ARRAY_AND_SIZE(pcm990_camera_pin_config));
      return 0;
}

/*
 * CICR4: PCLK_EN:      Pixel clock is supplied by the sensor
 *    MCLK_EN:    Master clock is generated by PXA
 *    PCP:        Data sampled on the falling edge of pixel clock
 */
struct pxacamera_platform_data pcm990_pxacamera_platform_data = {
      .init = pcm990_pxacamera_init,
      .flags  = PXA_CAMERA_MASTER | PXA_CAMERA_DATAWIDTH_8 | PXA_CAMERA_DATAWIDTH_10 |
            PXA_CAMERA_PCLK_EN | PXA_CAMERA_MCLK_EN/* | PXA_CAMERA_PCP*/,
      .mclk_10khz = 1000,
};

#include <linux/i2c/pca953x.h>

static struct pca953x_platform_data pca9536_data = {
      .gpio_base  = NR_BUILTIN_GPIO + 1,
};

static struct soc_camera_link iclink[] = {
      {
            .bus_id     = 0, /* Must match with the camera ID above */
            .gpio = NR_BUILTIN_GPIO + 1,
      }, {
            .bus_id     = 0, /* Must match with the camera ID above */
            .gpio = -ENXIO,
      }
};

/* Board I2C devices. */
static struct i2c_board_info __initdata pcm990_i2c_devices[] = {
      {
            /* Must initialize before the camera(s) */
            I2C_BOARD_INFO("pca9536", 0x41),
            .platform_data = &pca9536_data,
      }, {
            I2C_BOARD_INFO("mt9v022", 0x48),
            .platform_data = &iclink[0], /* With extender */
      }, {
            I2C_BOARD_INFO("mt9m001", 0x5d),
            .platform_data = &iclink[0], /* With extender */
      },
};
#endif /* CONFIG_VIDEO_PXA27x ||CONFIG_VIDEO_PXA27x_MODULE */

/*
 * enable generic access to the base board control CPLDs U6 and U7
 */
static struct map_desc pcm990_io_desc[] __initdata = {
      {
            .virtual    = PCM990_CTRL_BASE,
            .pfn        = __phys_to_pfn(PCM990_CTRL_PHYS),
            .length           = PCM990_CTRL_SIZE,
            .type       = MT_DEVICE /* CPLD */
      }, {
            .virtual    = PCM990_CF_PLD_BASE,
            .pfn        = __phys_to_pfn(PCM990_CF_PLD_PHYS),
            .length           = PCM990_CF_PLD_SIZE,
            .type       = MT_DEVICE /* CPLD */
      }
};

/*
 * system init for baseboard usage. Will be called by pcm027 init.
 *
 * Add platform devices present on this baseboard and init
 * them from CPU side as far as required to use them later on
 */
void __init pcm990_baseboard_init(void)
{
      pxa2xx_mfp_config(ARRAY_AND_SIZE(pcm990_pin_config));

      /* register CPLD access */
      iotable_init(ARRAY_AND_SIZE(pcm990_io_desc));

      /* register CPLD's IRQ controller */
      pcm990_init_irq();

#ifndef CONFIG_PCM990_DISPLAY_NONE
      set_pxa_fb_info(&pcm990_fbinfo);
#endif
      platform_device_register(&pcm990_backlight_device);

      /* MMC */
      pxa_set_mci_info(&pcm990_mci_platform_data);

      /* USB host */
      pxa_set_ohci_info(&pcm990_ohci_platform_data);

      pxa_set_i2c_info(NULL);
      pxa_set_ac97_info(NULL);

#if defined(CONFIG_VIDEO_PXA27x) || defined(CONFIG_VIDEO_PXA27x_MODULE)
      pxa_set_camera_info(&pcm990_pxacamera_platform_data);

      i2c_register_board_info(0, ARRAY_AND_SIZE(pcm990_i2c_devices));
#endif

      printk(KERN_INFO "PCM-990 Evaluation baseboard initialized\n");
}

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