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lubbock.c

/*
 *  linux/arch/arm/mach-pxa/lubbock.c
 *
 *  Support for the Intel DBPXA250 Development Platform.
 *
 *  Author: Nicolas Pitre
 *  Created:      Jun 15, 2001
 *  Copyright:    MontaVista Software Inc.
 *
 *  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/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/sysdev.h>
#include <linux/major.h>
#include <linux/fb.h>
#include <linux/interrupt.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/smc91x.h>

#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>
#include <mach/pxa2xx_spi.h>

#include <asm/setup.h>
#include <asm/memory.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/sizes.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/mach/flash.h>

#include <asm/hardware/sa1111.h>

#include <mach/pxa-regs.h>
#include <mach/pxa2xx-regs.h>
#include <mach/mfp-pxa25x.h>
#include <mach/audio.h>
#include <mach/lubbock.h>
#include <mach/udc.h>
#include <mach/irda.h>
#include <mach/pxafb.h>
#include <mach/mmc.h>

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

static unsigned long lubbock_pin_config[] __initdata = {
      GPIO15_nCS_1,     /* CS1 - Flash */
      GPIO78_nCS_2,     /* CS2 - Baseboard FGPA */
      GPIO79_nCS_3,     /* CS3 - SMC ethernet */
      GPIO80_nCS_4,     /* CS4 - SA1111 */

      /* SSP data pins */
      GPIO23_SSP1_SCLK,
      GPIO25_SSP1_TXD,
      GPIO26_SSP1_RXD,

      /* LCD - 16bpp DSTN */
      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,

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

      /* PC Card */
      GPIO48_nPOE,
      GPIO49_nPWE,
      GPIO50_nPIOR,
      GPIO51_nPIOW,
      GPIO52_nPCE_1,
      GPIO53_nPCE_2,
      GPIO54_nPSKTSEL,
      GPIO55_nPREG,
      GPIO56_nPWAIT,
      GPIO57_nIOIS16,

      /* MMC */
      GPIO6_MMC_CLK,
      GPIO8_MMC_CS0,

      /* wakeup */
      GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,
};

#define LUB_MISC_WR           __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)

void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
{
      unsigned long flags;

      local_irq_save(flags);
      LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
      local_irq_restore(flags);
}
EXPORT_SYMBOL(lubbock_set_misc_wr);

static unsigned long lubbock_irq_enabled;

static void lubbock_mask_irq(unsigned int irq)
{
      int lubbock_irq = (irq - LUBBOCK_IRQ(0));
      LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
}

static void lubbock_unmask_irq(unsigned int irq)
{
      int lubbock_irq = (irq - LUBBOCK_IRQ(0));
      /* the irq can be acknowledged only if deasserted, so it's done here */
      LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
      LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
}

static struct irq_chip lubbock_irq_chip = {
      .name       = "FPGA",
      .ack        = lubbock_mask_irq,
      .mask       = lubbock_mask_irq,
      .unmask           = lubbock_unmask_irq,
};

static void lubbock_irq_handler(unsigned int irq, struct irq_desc *desc)
{
      unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
      do {
            GEDR(0) = GPIO_bit(0);  /* clear our parent irq */
            if (likely(pending)) {
                  irq = LUBBOCK_IRQ(0) + __ffs(pending);
                  generic_handle_irq(irq);
            }
            pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
      } while (pending);
}

static void __init lubbock_init_irq(void)
{
      int irq;

      pxa25x_init_irq();

      /* setup extra lubbock irqs */
      for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
            set_irq_chip(irq, &lubbock_irq_chip);
            set_irq_handler(irq, handle_level_irq);
            set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
      }

      set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);
      set_irq_type(IRQ_GPIO(0), IRQ_TYPE_EDGE_FALLING);
}

#ifdef CONFIG_PM

static int lubbock_irq_resume(struct sys_device *dev)
{
      LUB_IRQ_MASK_EN = lubbock_irq_enabled;
      return 0;
}

static struct sysdev_class lubbock_irq_sysclass = {
      .name = "cpld_irq",
      .resume = lubbock_irq_resume,
};

static struct sys_device lubbock_irq_device = {
      .cls = &lubbock_irq_sysclass,
};

static int __init lubbock_irq_device_init(void)
{
      int ret = -ENODEV;

      if (machine_is_lubbock()) {
            ret = sysdev_class_register(&lubbock_irq_sysclass);
            if (ret == 0)
                  ret = sysdev_register(&lubbock_irq_device);
      }
      return ret;
}

device_initcall(lubbock_irq_device_init);

#endif

static int lubbock_udc_is_connected(void)
{
      return (LUB_MISC_RD & (1 << 9)) == 0;
}

static struct pxa2xx_udc_mach_info udc_info __initdata = {
      .udc_is_connected = lubbock_udc_is_connected,
      // no D+ pullup; lubbock can't connect/disconnect in software
};

static struct resource sa1111_resources[] = {
      [0] = {
            .start      = 0x10000000,
            .end  = 0x10001fff,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = LUBBOCK_SA1111_IRQ,
            .end  = LUBBOCK_SA1111_IRQ,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device sa1111_device = {
      .name       = "sa1111",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(sa1111_resources),
      .resource   = sa1111_resources,
};

/* ADS7846 is connected through SSP ... and if your board has J5 populated,
 * you can select it to replace the ucb1400 by switching the touchscreen cable
 * (to J5) and poking board registers (as done below).  Else it's only useful
 * for the temperature sensors.
 */
static struct pxa2xx_spi_master pxa_ssp_master_info = {
      .num_chipselect   = 1,
};

static int lubbock_ads7846_pendown_state(void)
{
      /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
      return 0;
}

static struct ads7846_platform_data ads_info = {
      .model                  = 7846,
      .vref_delay_usecs = 100,            /* internal, no cap */
      .get_pendown_state      = lubbock_ads7846_pendown_state,
      // .x_plate_ohms        = 500,      /* GUESS! */
      // .y_plate_ohms        = 500,      /* GUESS! */
};

static void ads7846_cs(u32 command)
{
      static const unsigned   TS_nCS = 1 << 11;
      lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
}

static struct pxa2xx_spi_chip ads_hw = {
      .tx_threshold           = 1,
      .rx_threshold           = 2,
      .cs_control       = ads7846_cs,
};

static struct spi_board_info spi_board_info[] __initdata = { {
      .modalias   = "ads7846",
      .platform_data    = &ads_info,
      .controller_data = &ads_hw,
      .irq        = LUBBOCK_BB_IRQ,
      .max_speed_hz     = 120000 /* max sample rate at 3V */
                        * 26 /* command + data + overhead */,
      .bus_num    = 1,
      .chip_select      = 0,
},
};

static struct resource smc91x_resources[] = {
      [0] = {
            .name = "smc91x-regs",
            .start      = 0x0c000c00,
            .end  = 0x0c0fffff,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = LUBBOCK_ETH_IRQ,
            .end  = LUBBOCK_ETH_IRQ,
            .flags      = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
      },
      [2] = {
            .name = "smc91x-attrib",
            .start      = 0x0e000000,
            .end  = 0x0e0fffff,
            .flags      = IORESOURCE_MEM,
      },
};

static struct smc91x_platdata lubbock_smc91x_info = {
      .flags      = SMC91X_USE_16BIT | SMC91X_NOWAIT | SMC91X_IO_SHIFT_2,
};

static struct platform_device smc91x_device = {
      .name       = "smc91x",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(smc91x_resources),
      .resource   = smc91x_resources,
      .dev        = {
            .platform_data = &lubbock_smc91x_info,
      },
};

static struct resource flash_resources[] = {
      [0] = {
            .start      = 0x00000000,
            .end  = SZ_64M - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = 0x04000000,
            .end  = 0x04000000 + SZ_64M - 1,
            .flags      = IORESOURCE_MEM,
      },
};

static struct mtd_partition lubbock_partitions[] = {
      {
            .name =           "Bootloader",
            .size =           0x00040000,
            .offset =   0,
            .mask_flags =     MTD_WRITEABLE  /* force read-only */
      },{
            .name =           "Kernel",
            .size =           0x00100000,
            .offset =   0x00040000,
      },{
            .name =           "Filesystem",
            .size =           MTDPART_SIZ_FULL,
            .offset =   0x00140000
      }
};

static struct flash_platform_data lubbock_flash_data[2] = {
      {
            .map_name   = "cfi_probe",
            .parts            = lubbock_partitions,
            .nr_parts   = ARRAY_SIZE(lubbock_partitions),
      }, {
            .map_name   = "cfi_probe",
            .parts            = NULL,
            .nr_parts   = 0,
      }
};

static struct platform_device lubbock_flash_device[2] = {
      {
            .name       = "pxa2xx-flash",
            .id         = 0,
            .dev = {
                  .platform_data = &lubbock_flash_data[0],
            },
            .resource = &flash_resources[0],
            .num_resources = 1,
      },
      {
            .name       = "pxa2xx-flash",
            .id         = 1,
            .dev = {
                  .platform_data = &lubbock_flash_data[1],
            },
            .resource = &flash_resources[1],
            .num_resources = 1,
      },
};

static struct platform_device *devices[] __initdata = {
      &sa1111_device,
      &smc91x_device,
      &lubbock_flash_device[0],
      &lubbock_flash_device[1],
};

static struct pxafb_mode_info sharp_lm8v31_mode = {
      .pixclock   = 270000,
      .xres       = 640,
      .yres       = 480,
      .bpp        = 16,
      .hsync_len  = 1,
      .left_margin      = 3,
      .right_margin     = 3,
      .vsync_len  = 1,
      .upper_margin     = 0,
      .lower_margin     = 0,
      .sync       = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
      .cmap_greyscale   = 0,
};

static struct pxafb_mach_info sharp_lm8v31 = {
      .modes            = &sharp_lm8v31_mode,
      .num_modes  = 1,
      .cmap_inverse     = 0,
      .cmap_static      = 0,
      .lcd_conn   = LCD_COLOR_DSTN_16BPP | LCD_PCLK_EDGE_FALL |
                    LCD_AC_BIAS_FREQ(255),
};

#define     MMC_POLL_RATE           msecs_to_jiffies(1000)

static void lubbock_mmc_poll(unsigned long);
static irq_handler_t mmc_detect_int;

static struct timer_list mmc_timer = {
      .function   = lubbock_mmc_poll,
};

static void lubbock_mmc_poll(unsigned long data)
{
      unsigned long flags;

      /* clear any previous irq state, then ... */
      local_irq_save(flags);
      LUB_IRQ_SET_CLR &= ~(1 << 0);
      local_irq_restore(flags);

      /* poll until mmc/sd card is removed */
      if (LUB_IRQ_SET_CLR & (1 << 0))
            mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
      else {
            (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);
            enable_irq(LUBBOCK_SD_IRQ);
      }
}

static irqreturn_t lubbock_detect_int(int irq, void *data)
{
      /* IRQ is level triggered; disable, and poll for removal */
      disable_irq(irq);
      mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);

      return mmc_detect_int(irq, data);
}

static int lubbock_mci_init(struct device *dev,
            irq_handler_t detect_int,
            void *data)
{
      /* detect card insert/eject */
      mmc_detect_int = detect_int;
      init_timer(&mmc_timer);
      mmc_timer.data = (unsigned long) data;
      return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
                  IRQF_SAMPLE_RANDOM, "lubbock-sd-detect", data);
}

static int lubbock_mci_get_ro(struct device *dev)
{
      return (LUB_MISC_RD & (1 << 2)) != 0;
}

static void lubbock_mci_exit(struct device *dev, void *data)
{
      free_irq(LUBBOCK_SD_IRQ, data);
      del_timer_sync(&mmc_timer);
}

static struct pxamci_platform_data lubbock_mci_platform_data = {
      .ocr_mask   = MMC_VDD_32_33|MMC_VDD_33_34,
      .detect_delay     = 1,
      .init             = lubbock_mci_init,
      .get_ro           = lubbock_mci_get_ro,
      .exit             = lubbock_mci_exit,
};

static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
{
      unsigned long flags;

      local_irq_save(flags);
      if (mode & IR_SIRMODE) {
            LUB_MISC_WR &= ~(1 << 4);
      } else if (mode & IR_FIRMODE) {
            LUB_MISC_WR |= 1 << 4;
      }
      pxa2xx_transceiver_mode(dev, mode);
      local_irq_restore(flags);
}

static struct pxaficp_platform_data lubbock_ficp_platform_data = {
      .transceiver_cap  = IR_SIRMODE | IR_FIRMODE,
      .transceiver_mode = lubbock_irda_transceiver_mode,
};

static void __init lubbock_init(void)
{
      int flashboot = (LUB_CONF_SWITCHES & 1);

      pxa2xx_mfp_config(ARRAY_AND_SIZE(lubbock_pin_config));

      clk_add_alias("SA1111_CLK", NULL, "GPIO11_CLK", NULL);
      pxa_set_udc_info(&udc_info);
      set_pxa_fb_info(&sharp_lm8v31);
      pxa_set_mci_info(&lubbock_mci_platform_data);
      pxa_set_ficp_info(&lubbock_ficp_platform_data);
      pxa_set_ac97_info(NULL);

      lubbock_flash_data[0].width = lubbock_flash_data[1].width =
            (BOOT_DEF & 1) ? 2 : 4;
      /* Compensate for the nROMBT switch which swaps the flash banks */
      printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
             flashboot?"Flash":"ROM", flashboot);

      lubbock_flash_data[flashboot^1].name = "application-flash";
      lubbock_flash_data[flashboot].name = "boot-rom";
      (void) platform_add_devices(devices, ARRAY_SIZE(devices));

      pxa2xx_set_spi_info(1, &pxa_ssp_master_info);
      spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
}

static struct map_desc lubbock_io_desc[] __initdata = {
      {     /* CPLD */
            .virtual    =  LUBBOCK_FPGA_VIRT,
            .pfn        = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
            .length           = 0x00100000,
            .type       = MT_DEVICE
      }
};

static void __init lubbock_map_io(void)
{
      pxa_map_io();
      iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));

      PCFR |= PCFR_OPDE;
}

MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
      /* Maintainer: MontaVista Software Inc. */
      .phys_io    = 0x40000000,
      .io_pg_offst      = (io_p2v(0x40000000) >> 18) & 0xfffc,
      .map_io           = lubbock_map_io,
      .init_irq   = lubbock_init_irq,
      .timer            = &pxa_timer,
      .init_machine     = lubbock_init,
MACHINE_END

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