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cm-x270.c

/*
 * linux/arch/arm/mach-pxa/cm-x270.c
 *
 * Copyright (C) 2007, 2008 CompuLab, Ltd.
 * Mike Rapoport <mike@compulab.co.il>
 *
 * 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/platform_device.h>
#include <linux/sysdev.h>
#include <linux/irq.h>
#include <linux/gpio.h>

#include <linux/rtc-v3020.h>
#include <video/mbxfb.h>

#include <mach/mfp-pxa27x.h>
#include <mach/ohci.h>
#include <mach/mmc.h>

#include "generic.h"

/* physical address if local-bus attached devices */
#define RTC_PHYS_BASE         (PXA_CS1_PHYS + (5 << 22))

/* GPIO IRQ usage */
#define GPIO83_MMC_IRQ        (83)

#define CMX270_MMC_IRQ        IRQ_GPIO(GPIO83_MMC_IRQ)

/* MMC power enable */
#define GPIO105_MMC_POWER     (105)

static unsigned long cmx270_pin_config[] = {
      /* AC'97 */
      GPIO28_AC97_BITCLK,
      GPIO29_AC97_SDATA_IN_0,
      GPIO30_AC97_SDATA_OUT,
      GPIO31_AC97_SYNC,
      GPIO98_AC97_SYSCLK,
      GPIO113_AC97_nRESET,

      /* BTUART */
      GPIO42_BTUART_RXD,
      GPIO43_BTUART_TXD,
      GPIO44_BTUART_CTS,
      GPIO45_BTUART_RTS,

      /* STUART */
      GPIO46_STUART_RXD,
      GPIO47_STUART_TXD,

      /* MCI controller */
      GPIO32_MMC_CLK,
      GPIO112_MMC_CMD,
      GPIO92_MMC_DAT_0,
      GPIO109_MMC_DAT_1,
      GPIO110_MMC_DAT_2,
      GPIO111_MMC_DAT_3,

      /* LCD */
      GPIO58_LCD_LDD_0,
      GPIO59_LCD_LDD_1,
      GPIO60_LCD_LDD_2,
      GPIO61_LCD_LDD_3,
      GPIO62_LCD_LDD_4,
      GPIO63_LCD_LDD_5,
      GPIO64_LCD_LDD_6,
      GPIO65_LCD_LDD_7,
      GPIO66_LCD_LDD_8,
      GPIO67_LCD_LDD_9,
      GPIO68_LCD_LDD_10,
      GPIO69_LCD_LDD_11,
      GPIO70_LCD_LDD_12,
      GPIO71_LCD_LDD_13,
      GPIO72_LCD_LDD_14,
      GPIO73_LCD_LDD_15,
      GPIO74_LCD_FCLK,
      GPIO75_LCD_LCLK,
      GPIO76_LCD_PCLK,
      GPIO77_LCD_BIAS,

      /* I2C */
      GPIO117_I2C_SCL,
      GPIO118_I2C_SDA,

      /* SSP1 */
      GPIO23_SSP1_SCLK,
      GPIO24_SSP1_SFRM,
      GPIO25_SSP1_TXD,
      GPIO26_SSP1_RXD,

      /* SSP2 */
      GPIO19_SSP2_SCLK,
      GPIO14_SSP2_SFRM,
      GPIO87_SSP2_TXD,
      GPIO88_SSP2_RXD,

      /* PC Card */
      GPIO48_nPOE,
      GPIO49_nPWE,
      GPIO50_nPIOR,
      GPIO51_nPIOW,
      GPIO85_nPCE_1,
      GPIO54_nPCE_2,
      GPIO55_nPREG,
      GPIO56_nPWAIT,
      GPIO57_nIOIS16,

      /* SDRAM and local bus */
      GPIO15_nCS_1,
      GPIO78_nCS_2,
      GPIO79_nCS_3,
      GPIO80_nCS_4,
      GPIO33_nCS_5,
      GPIO49_nPWE,
      GPIO18_RDY,

      /* GPIO */
      GPIO0_GPIO  | WAKEUP_ON_EDGE_BOTH,
      GPIO105_GPIO      | MFP_LPM_DRIVE_HIGH,   /* MMC/SD power */
      GPIO53_GPIO,                        /* PC card reset */

      /* NAND controls */
      GPIO11_GPIO | MFP_LPM_DRIVE_HIGH,   /* NAND CE# */
      GPIO89_GPIO,                        /* NAND Ready/Busy */

      /* interrupts */
      GPIO10_GPIO,      /* DM9000 interrupt */
      GPIO83_GPIO,      /* MMC card detect */
};

/* V3020 RTC */
#if defined(CONFIG_RTC_DRV_V3020) || defined(CONFIG_RTC_DRV_V3020_MODULE)
static struct resource cmx270_v3020_resource[] = {
      [0] = {
            .start = RTC_PHYS_BASE,
            .end   = RTC_PHYS_BASE + 4,
            .flags = IORESOURCE_MEM,
      },
};

struct v3020_platform_data cmx270_v3020_pdata = {
      .leftshift = 16,
};

static struct platform_device cmx270_rtc_device = {
      .name       = "v3020",
      .num_resources    = ARRAY_SIZE(cmx270_v3020_resource),
      .resource   = cmx270_v3020_resource,
      .id         = -1,
      .dev        = {
            .platform_data = &cmx270_v3020_pdata,
      }
};

static void __init cmx270_init_rtc(void)
{
      platform_device_register(&cmx270_rtc_device);
}
#else
static inline void cmx270_init_rtc(void) {}
#endif

/* 2700G graphics */
#if defined(CONFIG_FB_MBX) || defined(CONFIG_FB_MBX_MODULE)
static u64 fb_dma_mask = ~(u64)0;

static struct resource cmx270_2700G_resource[] = {
      /* frame buffer memory including ODFB and External SDRAM */
      [0] = {
            .start = PXA_CS2_PHYS,
            .end   = PXA_CS2_PHYS + 0x01ffffff,
            .flags = IORESOURCE_MEM,
      },
      /* Marathon registers */
      [1] = {
            .start = PXA_CS2_PHYS + 0x03fe0000,
            .end   = PXA_CS2_PHYS + 0x03ffffff,
            .flags = IORESOURCE_MEM,
      },
};

static unsigned long save_lcd_regs[10];

static int cmx270_marathon_probe(struct fb_info *fb)
{
      /* save PXA-270 pin settings before enabling 2700G */
      save_lcd_regs[0] = GPDR1;
      save_lcd_regs[1] = GPDR2;
      save_lcd_regs[2] = GAFR1_U;
      save_lcd_regs[3] = GAFR2_L;
      save_lcd_regs[4] = GAFR2_U;

      /* Disable PXA-270 on-chip controller driving pins */
      GPDR1 &= ~(0xfc000000);
      GPDR2 &= ~(0x00c03fff);
      GAFR1_U &= ~(0xfff00000);
      GAFR2_L &= ~(0x0fffffff);
      GAFR2_U &= ~(0x0000f000);
      return 0;
}

static int cmx270_marathon_remove(struct fb_info *fb)
{
      GPDR1 =   save_lcd_regs[0];
      GPDR2 =   save_lcd_regs[1];
      GAFR1_U = save_lcd_regs[2];
      GAFR2_L = save_lcd_regs[3];
      GAFR2_U = save_lcd_regs[4];
      return 0;
}

static struct mbxfb_platform_data cmx270_2700G_data = {
      .xres = {
            .min = 240,
            .max = 1200,
            .defval = 640,
      },
      .yres = {
            .min = 240,
            .max = 1200,
            .defval = 480,
      },
      .bpp = {
            .min = 16,
            .max = 32,
            .defval = 16,
      },
      .memsize = 8*1024*1024,
      .probe = cmx270_marathon_probe,
      .remove = cmx270_marathon_remove,
};

static struct platform_device cmx270_2700G = {
      .name       = "mbx-fb",
      .dev        = {
            .platform_data    = &cmx270_2700G_data,
            .dma_mask   = &fb_dma_mask,
            .coherent_dma_mask = 0xffffffff,
      },
      .num_resources    = ARRAY_SIZE(cmx270_2700G_resource),
      .resource   = cmx270_2700G_resource,
      .id         = -1,
};

static void __init cmx270_init_2700G(void)
{
      platform_device_register(&cmx270_2700G);
}
#else
static inline void cmx270_init_2700G(void) {}
#endif

/* PXA27x OHCI controller setup */
#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
static struct pxaohci_platform_data cmx270_ohci_platform_data = {
      .port_mode  = PMM_PERPORT_MODE,
      .flags            = ENABLE_PORT1 | ENABLE_PORT2 | POWER_CONTROL_LOW,
};

static void __init cmx270_init_ohci(void)
{
      pxa_set_ohci_info(&cmx270_ohci_platform_data);
}
#else
static inline void cmx270_init_ohci(void) {}
#endif

#if defined(CONFIG_MMC) || defined(CONFIG_MMC_MODULE)
static int cmx270_mci_init(struct device *dev,
                     irq_handler_t cmx270_detect_int,
                     void *data)
{
      int err;

      err = gpio_request(GPIO105_MMC_POWER, "MMC/SD power");
      if (err) {
            dev_warn(dev, "power gpio unavailable\n");
            return err;
      }

      gpio_direction_output(GPIO105_MMC_POWER, 0);

      err = request_irq(CMX270_MMC_IRQ, cmx270_detect_int,
                    IRQF_DISABLED | IRQF_TRIGGER_FALLING,
                    "MMC card detect", data);
      if (err) {
            gpio_free(GPIO105_MMC_POWER);
            dev_err(dev, "cmx270_mci_init: MMC/SD: can't"
                  " request MMC card detect IRQ\n");
      }

      return err;
}

static void cmx270_mci_setpower(struct device *dev, unsigned int vdd)
{
      struct pxamci_platform_data *p_d = dev->platform_data;

      if ((1 << vdd) & p_d->ocr_mask) {
            dev_dbg(dev, "power on\n");
            gpio_set_value(GPIO105_MMC_POWER, 0);
      } else {
            gpio_set_value(GPIO105_MMC_POWER, 1);
            dev_dbg(dev, "power off\n");
      }
}

static void cmx270_mci_exit(struct device *dev, void *data)
{
      free_irq(CMX270_MMC_IRQ, data);
      gpio_free(GPIO105_MMC_POWER);
}

static struct pxamci_platform_data cmx270_mci_platform_data = {
      .ocr_mask   = MMC_VDD_32_33|MMC_VDD_33_34,
      .init             = cmx270_mci_init,
      .setpower   = cmx270_mci_setpower,
      .exit       = cmx270_mci_exit,
};

static void __init cmx270_init_mmc(void)
{
      pxa_set_mci_info(&cmx270_mci_platform_data);
}
#else
static inline void cmx270_init_mmc(void) {}
#endif

void __init cmx270_init(void)
{
      pxa2xx_mfp_config(ARRAY_AND_SIZE(cmx270_pin_config));

      cmx270_init_rtc();
      cmx270_init_mmc();
      cmx270_init_ohci();
      cmx270_init_2700G();
}

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