pcm990-baseboard.c

Go to the documentation of this file.

/*
 *  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: [email protected]
 *
 *  based on Intel Mainstone Board
 *
 *  Copyright 2007 Juergen Beisert @ Pengutronix ([email protected])
 *
 *  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/gpio.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/i2c/pxa-i2c.h>
#include <linux/pwm_backlight.h>

#include <media/soc_camera.h>

#include <linux/platform_data/camera-pxa.h>
#include <asm/mach/map.h>
#include <mach/pxa27x.h>
#include <mach/audio.h>
#include <linux/platform_data/mmc-pxamci.h>
#include <linux/platform_data/usb-ohci-pxa27x.h>
#include <mach/pcm990_baseboard.h>
#include <linux/platform_data/video-pxafb.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,

    /* I2C */
    GPIO117_I2C_SCL,
    GPIO118_I2C_SDA,

    /* AC97 */
    GPIO28_AC97_BITCLK,
    GPIO29_AC97_SDATA_IN_0,
    GPIO30_AC97_SDATA_OUT,
    GPIO31_AC97_SYNC,
};

static void __iomem *pcm990_cpld_base;

static u8 pcm990_cpld_readb(unsigned int reg)
{
    return readb(pcm990_cpld_base + reg);
}

static void pcm990_cpld_writeb(u8 value, unsigned int reg)
{
    writeb(value, pcm990_cpld_base + reg);
}

/*
 * 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_cpld_writeb(PCM990_CTRL_LCDPWR + PCM990_CTRL_LCDON,
                PCM990_CTRL_REG3);
    } else {
        /* disable LCD-Latches
         * power off LCD
         */
        pcm990_cpld_writeb(0, PCM990_CTRL_REG3);
    }
}
#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,
    .lcd_conn       = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
    .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,
    .lcd_conn       = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
    .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(struct irq_data *d)
{
    int pcm990_irq = (d->irq - PCM027_IRQ(0));

    pcm990_irq_enabled &= ~(1 << pcm990_irq);

    pcm990_cpld_writeb(pcm990_irq_enabled, PCM990_CTRL_INTMSKENA);
}

static void pcm990_unmask_irq(struct irq_data *d)
{
    int pcm990_irq = (d->irq - PCM027_IRQ(0));
    u8 val;

    /* the irq can be acknowledged only if deasserted, so it's done here */

    pcm990_irq_enabled |= (1 << pcm990_irq);

    val = pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
    val |= 1 << pcm990_irq;
    pcm990_cpld_writeb(val, PCM990_CTRL_INTSETCLR);

    pcm990_cpld_writeb(pcm990_irq_enabled, PCM990_CTRL_INTMSKENA);
}

static struct irq_chip pcm990_irq_chip = {
    .irq_mask_ack   = pcm990_mask_ack_irq,
    .irq_unmask = pcm990_unmask_irq,
};

static void pcm990_irq_handler(unsigned int irq, struct irq_desc *desc)
{
    unsigned long pending;

    pending = ~pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
    pending &= pcm990_irq_enabled;

    do {
        /* clear our parent IRQ */
        desc->irq_data.chip->irq_ack(&desc->irq_data);
        if (likely(pending)) {
            irq = PCM027_IRQ(0) + __ffs(pending);
            generic_handle_irq(irq);
        }
        pending = ~pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
        pending &= 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++) {
        irq_set_chip_and_handler(irq, &pcm990_irq_chip,
                     handle_level_irq);
        set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
    }

    /* disable all Interrupts */
    pcm990_cpld_writeb(0x0, PCM990_CTRL_INTMSKENA);
    pcm990_cpld_writeb(0xff, PCM990_CTRL_INTSETCLR);

    irq_set_chained_handler(PCM990_CTRL_INT_IRQ, pcm990_irq_handler);
    irq_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;
    u8 val;

    val = pcm990_cpld_readb(PCM990_CTRL_REG5);

    if ((1 << vdd) & p_d->ocr_mask)
        val |= PCM990_CTRL_MMC2PWR;
    else
        val &= ~PCM990_CTRL_MMC2PWR;

    pcm990_cpld_writeb(PCM990_CTRL_MMC2PWR, PCM990_CTRL_REG5);
}

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_ms    = 250,
    .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
    .init           = pcm990_mci_init,
    .setpower       = pcm990_mci_setpower,
    .exit           = pcm990_mci_exit,
    .gpio_card_detect   = -1,
    .gpio_card_ro       = -1,
    .gpio_power     = -1,
};

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,
};

/*
 * 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 = {
    .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  = PXA_NR_BUILTIN_GPIO,
};

static int gpio_bus_switch = -EINVAL;

static int pcm990_camera_set_bus_param(struct soc_camera_link *link,
                       unsigned long flags)
{
    if (gpio_bus_switch < 0) {
        if (flags == SOCAM_DATAWIDTH_10)
            return 0;
        else
            return -EINVAL;
    }

    if (flags & SOCAM_DATAWIDTH_8)
        gpio_set_value_cansleep(gpio_bus_switch, 1);
    else
        gpio_set_value_cansleep(gpio_bus_switch, 0);

    return 0;
}

static unsigned long pcm990_camera_query_bus_param(struct soc_camera_link *link)
{
    int ret;

    if (gpio_bus_switch < 0) {
        ret = gpio_request(PXA_NR_BUILTIN_GPIO, "camera");
        if (!ret) {
            gpio_bus_switch = PXA_NR_BUILTIN_GPIO;
            gpio_direction_output(gpio_bus_switch, 0);
        }
    }

    if (gpio_bus_switch >= 0)
        return SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_10;
    else
        return SOCAM_DATAWIDTH_10;
}

static void pcm990_camera_free_bus(struct soc_camera_link *link)
{
    if (gpio_bus_switch < 0)
        return;

    gpio_free(gpio_bus_switch);
    gpio_bus_switch = -EINVAL;
}

/* 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,
    },
};

static struct i2c_board_info pcm990_camera_i2c[] = {
    {
        I2C_BOARD_INFO("mt9v022", 0x48),
    }, {
        I2C_BOARD_INFO("mt9m001", 0x5d),
    },
};

static struct soc_camera_link iclink[] = {
    {
        .bus_id         = 0, /* Must match with the camera ID */
        .board_info     = &pcm990_camera_i2c[0],
        .i2c_adapter_id     = 0,
        .query_bus_param    = pcm990_camera_query_bus_param,
        .set_bus_param      = pcm990_camera_set_bus_param,
        .free_bus       = pcm990_camera_free_bus,
    }, {
        .bus_id         = 0, /* Must match with the camera ID */
        .board_info     = &pcm990_camera_i2c[1],
        .i2c_adapter_id     = 0,
        .query_bus_param    = pcm990_camera_query_bus_param,
        .set_bus_param      = pcm990_camera_set_bus_param,
        .free_bus       = pcm990_camera_free_bus,
    },
};

static struct platform_device pcm990_camera[] = {
    {
        .name   = "soc-camera-pdrv",
        .id = 0,
        .dev    = {
            .platform_data = &iclink[0],
        },
    }, {
        .name   = "soc-camera-pdrv",
        .id = 1,
        .dev    = {
            .platform_data = &iclink[1],
        },
    },
};
#endif /* CONFIG_VIDEO_PXA27x ||CONFIG_VIDEO_PXA27x_MODULE */

/*
 * 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));

    pcm990_cpld_base = ioremap(PCM990_CTRL_PHYS, PCM990_CTRL_SIZE);
    if (!pcm990_cpld_base) {
        pr_err("pcm990: failed to ioremap cpld\n");
        return;
    }

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

#ifndef CONFIG_PCM990_DISPLAY_NONE
    pxa_set_fb_info(NULL, &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)
    pxa2xx_mfp_config(ARRAY_AND_SIZE(pcm990_camera_pin_config));
    pxa_set_camera_info(&pcm990_pxacamera_platform_data);

    i2c_register_board_info(0, ARRAY_AND_SIZE(pcm990_i2c_devices));

    platform_device_register(&pcm990_camera[0]);
    platform_device_register(&pcm990_camera[1]);
#endif

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