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cm-x270.c

/*
 * linux/arch/arm/mach-pxa/cm-x270.c
 *
 * Copyright (C) 2007 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/types.h>
#include <linux/pm.h>
#include <linux/fb.h>
#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/sysdev.h>
#include <linux/io.h>
#include <linux/delay.h>

#include <linux/dm9000.h>
#include <linux/rtc-v3020.h>
#include <linux/serial_8250.h>

#include <video/mbxfb.h>

#include <asm/mach/arch.h>
#include <asm/mach-types.h>
#include <asm/mach/map.h>

#include <asm/arch/pxa-regs.h>
#include <asm/arch/pxa2xx-regs.h>
#include <asm/arch/pxa2xx-gpio.h>
#include <asm/arch/pxafb.h>
#include <asm/arch/ohci.h>
#include <asm/arch/mmc.h>
#include <asm/arch/bitfield.h>
#include <asm/arch/cm-x270.h>

#include <asm/hardware/it8152.h>

#include "generic.h"
#include "cm-x270-pci.h"

#define RTC_PHYS_BASE         (PXA_CS1_PHYS + (5 << 22))
#define DM9000_PHYS_BASE      (PXA_CS1_PHYS + (6 << 22))

static struct resource cmx270_dm9k_resource[] = {
      [0] = {
            .start = DM9000_PHYS_BASE,
            .end   = DM9000_PHYS_BASE + 4,
            .flags = IORESOURCE_MEM,
      },
      [1] = {
            .start = DM9000_PHYS_BASE + 8,
            .end   = DM9000_PHYS_BASE + 8 + 500,
            .flags = IORESOURCE_MEM,
      },
      [2] = {
            .start = CMX270_ETHIRQ,
            .end   = CMX270_ETHIRQ,
            .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
      }
};

/* for the moment we limit ourselves to 32bit IO until some
 * better IO routines can be written and tested
 */
static struct dm9000_plat_data cmx270_dm9k_platdata = {
      .flags            = DM9000_PLATF_32BITONLY,
};

/* Ethernet device */
static struct platform_device cmx270_device_dm9k = {
      .name       = "dm9000",
      .id         = 0,
      .num_resources    = ARRAY_SIZE(cmx270_dm9k_resource),
      .resource   = cmx270_dm9k_resource,
      .dev        = {
            .platform_data = &cmx270_dm9k_platdata,
      }
};

/* audio device */
static struct platform_device cmx270_audio_device = {
      .name       = "pxa2xx-ac97",
      .id         = -1,
};

/* touchscreen controller */
static struct platform_device cmx270_ts_device = {
      .name       = "ucb1400_ts",
      .id         = -1,
};

/* RTC */
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,
      }
};

/*
 * CM-X270 LEDs
 */
static struct platform_device cmx270_led_device = {
      .name       = "cm-x270-led",
      .id         = -1,
};

/* 2700G graphics */
static u64 fb_dma_mask = ~(u64)0;

static struct resource cmx270_2700G_resource[] = {
      /* frame buffer memory including ODFB and External SDRAM */
      [0] = {
            .start = MARATHON_PHYS,
            .end   = MARATHON_PHYS + 0x02000000,
            .flags = IORESOURCE_MEM,
      },
      /* Marathon registers */
      [1] = {
            .start = MARATHON_PHYS + 0x03fe0000,
            .end   = MARATHON_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 u64 ata_dma_mask = ~(u64)0;

static struct platform_device cmx270_ata = {
      .name = "pata_cm_x270",
      .id = -1,
      .dev        = {
            .dma_mask   = &ata_dma_mask,
            .coherent_dma_mask = 0xffffffff,
      },
};

/* platform devices */
static struct platform_device *platform_devices[] __initdata = {
      &cmx270_device_dm9k,
      &cmx270_audio_device,
      &cmx270_rtc_device,
      &cmx270_2700G,
      &cmx270_led_device,
      &cmx270_ts_device,
      &cmx270_ata,
};

/* Map PCI companion and IDE/General Purpose CS statically */
static struct map_desc cmx270_io_desc[] __initdata = {
      [0] = { /* IDE/general purpose space */
            .virtual    = CMX270_IDE104_VIRT,
            .pfn        = __phys_to_pfn(CMX270_IDE104_PHYS),
            .length           = SZ_64M - SZ_8M,
            .type       = MT_DEVICE
      },
      [1] = { /* PCI bridge */
            .virtual    = CMX270_IT8152_VIRT,
            .pfn        = __phys_to_pfn(CMX270_IT8152_PHYS),
            .length           = SZ_64M,
            .type       = MT_DEVICE
      },
};

/*
  Display definitions
  keep these for backwards compatibility, although symbolic names (as
  e.g. in lpd270.c) looks better
*/
#define MTYPE_STN320x240      0
#define MTYPE_TFT640x480      1
#define MTYPE_CRT640x480      2
#define MTYPE_CRT800x600      3
#define MTYPE_TFT320x240      6
#define MTYPE_STN640x480      7

static struct pxafb_mode_info generic_stn_320x240_mode = {
      .pixclock   = 76923,
      .bpp        = 8,
      .xres       = 320,
      .yres       = 240,
      .hsync_len  = 3,
      .vsync_len  = 2,
      .left_margin      = 3,
      .upper_margin     = 0,
      .right_margin     = 3,
      .lower_margin     = 0,
      .sync       = (FB_SYNC_HOR_HIGH_ACT |
                     FB_SYNC_VERT_HIGH_ACT),
      .cmap_greyscale = 0,
};

static struct pxafb_mach_info generic_stn_320x240 = {
      .modes            = &generic_stn_320x240_mode,
      .num_modes  = 1,
      .lccr0            = 0,
      .lccr3            = (LCCR3_PixClkDiv(0x03) |
                     LCCR3_Acb(0xff) |
                     LCCR3_PCP),
      .cmap_inverse     = 0,
      .cmap_static      = 0,
};

static struct pxafb_mode_info generic_tft_640x480_mode = {
      .pixclock   = 38461,
      .bpp        = 8,
      .xres       = 640,
      .yres       = 480,
      .hsync_len  = 60,
      .vsync_len  = 2,
      .left_margin      = 70,
      .upper_margin     = 10,
      .right_margin     = 70,
      .lower_margin     = 5,
      .sync       = 0,
      .cmap_greyscale = 0,
};

static struct pxafb_mach_info generic_tft_640x480 = {
      .modes            = &generic_tft_640x480_mode,
      .num_modes  = 1,
      .lccr0            = (LCCR0_PAS),
      .lccr3            = (LCCR3_PixClkDiv(0x01) |
                     LCCR3_Acb(0xff) |
                     LCCR3_PCP),
      .cmap_inverse     = 0,
      .cmap_static      = 0,
};

static struct pxafb_mode_info generic_crt_640x480_mode = {
      .pixclock   = 38461,
      .bpp        = 8,
      .xres       = 640,
      .yres       = 480,
      .hsync_len  = 63,
      .vsync_len  = 2,
      .left_margin      = 81,
      .upper_margin     = 33,
      .right_margin     = 16,
      .lower_margin     = 10,
      .sync       = (FB_SYNC_HOR_HIGH_ACT |
                     FB_SYNC_VERT_HIGH_ACT),
      .cmap_greyscale = 0,
};

static struct pxafb_mach_info generic_crt_640x480 = {
      .modes            = &generic_crt_640x480_mode,
      .num_modes  = 1,
      .lccr0            = (LCCR0_PAS),
      .lccr3            = (LCCR3_PixClkDiv(0x01) |
                     LCCR3_Acb(0xff)),
      .cmap_inverse     = 0,
      .cmap_static      = 0,
};

static struct pxafb_mode_info generic_crt_800x600_mode = {
      .pixclock   = 28846,
      .bpp        = 8,
      .xres       = 800,
      .yres       = 600,
      .hsync_len  = 63,
      .vsync_len  = 2,
      .left_margin      = 26,
      .upper_margin     = 21,
      .right_margin     = 26,
      .lower_margin     = 11,
      .sync       = (FB_SYNC_HOR_HIGH_ACT |
                     FB_SYNC_VERT_HIGH_ACT),
      .cmap_greyscale = 0,
};

static struct pxafb_mach_info generic_crt_800x600 = {
      .modes            = &generic_crt_800x600_mode,
      .num_modes  = 1,
      .lccr0            = (LCCR0_PAS),
      .lccr3            = (LCCR3_PixClkDiv(0x02) |
                     LCCR3_Acb(0xff)),
      .cmap_inverse     = 0,
      .cmap_static      = 0,
};

static struct pxafb_mode_info generic_tft_320x240_mode = {
      .pixclock   = 134615,
      .bpp        = 16,
      .xres       = 320,
      .yres       = 240,
      .hsync_len  = 63,
      .vsync_len  = 7,
      .left_margin      = 75,
      .upper_margin     = 0,
      .right_margin     = 15,
      .lower_margin     = 15,
      .sync       = 0,
      .cmap_greyscale = 0,
};

static struct pxafb_mach_info generic_tft_320x240 = {
      .modes            = &generic_tft_320x240_mode,
      .num_modes  = 1,
      .lccr0            = (LCCR0_PAS),
      .lccr3            = (LCCR3_PixClkDiv(0x06) |
                     LCCR3_Acb(0xff) |
                     LCCR3_PCP),
      .cmap_inverse     = 0,
      .cmap_static      = 0,
};

static struct pxafb_mode_info generic_stn_640x480_mode = {
      .pixclock   = 57692,
      .bpp        = 8,
      .xres       = 640,
      .yres       = 480,
      .hsync_len  = 4,
      .vsync_len  = 2,
      .left_margin      = 10,
      .upper_margin     = 5,
      .right_margin     = 10,
      .lower_margin     = 5,
      .sync       = (FB_SYNC_HOR_HIGH_ACT |
                     FB_SYNC_VERT_HIGH_ACT),
      .cmap_greyscale = 0,
};

static struct pxafb_mach_info generic_stn_640x480 = {
      .modes            = &generic_stn_640x480_mode,
      .num_modes  = 1,
      .lccr0            = 0,
      .lccr3            = (LCCR3_PixClkDiv(0x02) |
                     LCCR3_Acb(0xff)),
      .cmap_inverse     = 0,
      .cmap_static      = 0,
};

static struct pxafb_mach_info *cmx270_display = &generic_crt_640x480;

static int __init cmx270_set_display(char *str)
{
      int disp_type = simple_strtol(str, NULL, 0);
      switch (disp_type) {
      case MTYPE_STN320x240:
            cmx270_display = &generic_stn_320x240;
            break;
      case MTYPE_TFT640x480:
            cmx270_display = &generic_tft_640x480;
            break;
      case MTYPE_CRT640x480:
            cmx270_display = &generic_crt_640x480;
            break;
      case MTYPE_CRT800x600:
            cmx270_display = &generic_crt_800x600;
            break;
      case MTYPE_TFT320x240:
            cmx270_display = &generic_tft_320x240;
            break;
      case MTYPE_STN640x480:
            cmx270_display = &generic_stn_640x480;
            break;
      default: /* fallback to CRT 640x480 */
            cmx270_display = &generic_crt_640x480;
            break;
      }
      return 1;
}

/*
   This should be done really early to get proper configuration for
   frame buffer.
   Indeed, pxafb parameters can be used istead, but CM-X270 bootloader
   has limitied line length for kernel command line, and also it will
   break compatibitlty with proprietary releases already in field.
*/
__setup("monitor=", cmx270_set_display);

/* PXA27x OHCI controller setup */
static int cmx270_ohci_init(struct device *dev)
{
      /* Set the Power Control Polarity Low */
      UHCHR = (UHCHR | UHCHR_PCPL) &
            ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSE);

      return 0;
}

static struct pxaohci_platform_data cmx270_ohci_platform_data = {
      .port_mode  = PMM_PERPORT_MODE,
      .init       = cmx270_ohci_init,
};


static int cmx270_mci_init(struct device *dev,
                     irq_handler_t cmx270_detect_int,
                     void *data)
{
      int err;

      /*
       * setup GPIO for PXA27x MMC controller
       */
      pxa_gpio_mode(GPIO32_MMCCLK_MD);
      pxa_gpio_mode(GPIO112_MMCCMD_MD);
      pxa_gpio_mode(GPIO92_MMCDAT0_MD);
      pxa_gpio_mode(GPIO109_MMCDAT1_MD);
      pxa_gpio_mode(GPIO110_MMCDAT2_MD);
      pxa_gpio_mode(GPIO111_MMCDAT3_MD);

      /* SB-X270 uses GPIO105 as SD power enable */
      pxa_gpio_mode(105 | GPIO_OUT);

      /* card detect IRQ on GPIO 83 */
      pxa_gpio_mode(IRQ_TO_GPIO(CMX270_MMC_IRQ));

      err = request_irq(CMX270_MMC_IRQ, cmx270_detect_int,
                    IRQF_DISABLED | IRQF_TRIGGER_FALLING,
                    "MMC card detect", data);
      if (err)
            printk(KERN_ERR "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) {
            printk(KERN_DEBUG "%s: on\n", __func__);
            GPCR(105) = GPIO_bit(105);
      } else {
            GPSR(105) = GPIO_bit(105);
            printk(KERN_DEBUG "%s: off\n", __func__);
      }
}

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

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,
};

#ifdef CONFIG_PM
static unsigned long sleep_save_msc[10];

static int cmx270_suspend(struct sys_device *dev, pm_message_t state)
{
      cmx270_pci_suspend();

      /* save MSC registers */
      sleep_save_msc[0] = MSC0;
      sleep_save_msc[1] = MSC1;
      sleep_save_msc[2] = MSC2;

      /* setup power saving mode registers */
      PCFR = 0x0;
      PSLR = 0xff400000;
      PMCR  = 0x00000005;
      PWER  = 0x80000000;
      PFER  = 0x00000000;
      PRER  = 0x00000000;
      PGSR0 = 0xC0018800;
      PGSR1 = 0x004F0002;
      PGSR2 = 0x6021C000;
      PGSR3 = 0x00020000;

      return 0;
}

static int cmx270_resume(struct sys_device *dev)
{
      cmx270_pci_resume();

      /* restore MSC registers */
      MSC0 = sleep_save_msc[0];
      MSC1 = sleep_save_msc[1];
      MSC2 = sleep_save_msc[2];

      return 0;
}

static struct sysdev_class cmx270_pm_sysclass = {
      .name = "pm",
      .resume = cmx270_resume,
      .suspend = cmx270_suspend,
};

static struct sys_device cmx270_pm_device = {
      .cls = &cmx270_pm_sysclass,
};

static int __init cmx270_pm_init(void)
{
      int error;
      error = sysdev_class_register(&cmx270_pm_sysclass);
      if (error == 0)
            error = sysdev_register(&cmx270_pm_device);
      return error;
}
#else
static int __init cmx270_pm_init(void) { return 0; }
#endif

static void __init cmx270_init(void)
{
      cmx270_pm_init();

      set_pxa_fb_info(cmx270_display);

      /* register CM-X270 platform devices */
      platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));

      /* set MCI and OHCI platform parameters */
      pxa_set_mci_info(&cmx270_mci_platform_data);
      pxa_set_ohci_info(&cmx270_ohci_platform_data);

      /* This enables the STUART */
      pxa_gpio_mode(GPIO46_STRXD_MD);
      pxa_gpio_mode(GPIO47_STTXD_MD);

      /* This enables the BTUART  */
      pxa_gpio_mode(GPIO42_BTRXD_MD);
      pxa_gpio_mode(GPIO43_BTTXD_MD);
      pxa_gpio_mode(GPIO44_BTCTS_MD);
      pxa_gpio_mode(GPIO45_BTRTS_MD);
}

static void __init cmx270_init_irq(void)
{
      pxa27x_init_irq();


      cmx270_pci_init_irq();

      /* Setup interrupt for dm9000 */
      pxa_gpio_mode(IRQ_TO_GPIO(CMX270_ETHIRQ));
      set_irq_type(CMX270_ETHIRQ, IRQT_RISING);

      /* Setup interrupt for 2700G */
      pxa_gpio_mode(IRQ_TO_GPIO(CMX270_GFXIRQ));
      set_irq_type(CMX270_GFXIRQ, IRQT_FALLING);
}

static void __init cmx270_map_io(void)
{
      pxa_map_io();
      iotable_init(cmx270_io_desc, ARRAY_SIZE(cmx270_io_desc));
}


MACHINE_START(ARMCORE, "Compulab CM-x270")
      .boot_params      = 0xa0000100,
      .phys_io    = 0x40000000,
      .io_pg_offst      = (io_p2v(0x40000000) >> 18) & 0xfffc,
      .map_io           = cmx270_map_io,
      .init_irq   = cmx270_init_irq,
      .timer            = &pxa_timer,
      .init_machine     = cmx270_init,
MACHINE_END

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