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badge4.c

/*
 * linux/arch/arm/mach-sa1100/badge4.c
 *
 * BadgePAD 4 specific initialization
 *
 *   Tim Connors <connors@hpl.hp.com>
 *   Christopher Hoover <ch@hpl.hp.com>
 *
 * Copyright (C) 2002 Hewlett-Packard Company
 *
 * 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/init.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/tty.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/errno.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/setup.h>
#include <mach/irqs.h>

#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/map.h>
#include <asm/hardware/sa1111.h>
#include <asm/mach/serial_sa1100.h>

#include <mach/badge4.h>

#include "generic.h"

static struct resource sa1111_resources[] = {
      [0] = {
            .start            = BADGE4_SA1111_BASE,
            .end        = BADGE4_SA1111_BASE + 0x00001fff,
            .flags            = IORESOURCE_MEM,
      },
      [1] = {
            .start            = BADGE4_IRQ_GPIO_SA1111,
            .end        = BADGE4_IRQ_GPIO_SA1111,
            .flags            = IORESOURCE_IRQ,
      },
};

static u64 sa1111_dmamask = 0xffffffffUL;

static struct platform_device sa1111_device = {
      .name       = "sa1111",
      .id         = 0,
      .dev        = {
            .dma_mask = &sa1111_dmamask,
            .coherent_dma_mask = 0xffffffff,
      },
      .num_resources    = ARRAY_SIZE(sa1111_resources),
      .resource   = sa1111_resources,
};

static struct platform_device *devices[] __initdata = {
      &sa1111_device,
};

static int __init badge4_sa1111_init(void)
{
      /*
       * Ensure that the memory bus request/grant signals are setup,
       * and the grant is held in its inactive state
       */
      sa1110_mb_disable();

      /*
       * Probe for SA1111.
       */
      return platform_add_devices(devices, ARRAY_SIZE(devices));
}


/*
 * 1 x Intel 28F320C3 Advanced+ Boot Block Flash (32 Mi bit)
 *   Eight 4 KiW Parameter Bottom Blocks (64 KiB)
 *   Sixty-three 32 KiW Main Blocks (4032 Ki b)
 *
 * <or>
 *
 * 1 x Intel 28F640C3 Advanced+ Boot Block Flash (64 Mi bit)
 *   Eight 4 KiW Parameter Bottom Blocks (64 KiB)
 *   One-hundred-twenty-seven 32 KiW Main Blocks (8128 Ki b)
 */
static struct mtd_partition badge4_partitions[] = {
        {
                .name           = "BLOB boot loader",
                .offset         = 0,
                .size           = 0x0000A000
        }, {
                .name           = "params",
                .offset         = MTDPART_OFS_APPEND,
                .size           = 0x00006000
        }, {
                .name           = "root",
                .offset         = MTDPART_OFS_APPEND,
                .size           = MTDPART_SIZ_FULL
        }
};

static struct flash_platform_data badge4_flash_data = {
      .map_name   = "cfi_probe",
      .parts            = badge4_partitions,
      .nr_parts   = ARRAY_SIZE(badge4_partitions),
};

static struct resource badge4_flash_resource = {
      .start            = SA1100_CS0_PHYS,
      .end        = SA1100_CS0_PHYS + SZ_64M - 1,
      .flags            = IORESOURCE_MEM,
};

static int five_v_on __initdata = 0;

static int __init five_v_on_setup(char *ignore)
{
        five_v_on = 1;
      return 1;
}
__setup("five_v_on", five_v_on_setup);


static int __init badge4_init(void)
{
      int ret;

      if (!machine_is_badge4())
            return -ENODEV;

      /* LCD */
      GPCR  = (BADGE4_GPIO_LGP2 | BADGE4_GPIO_LGP3 |
             BADGE4_GPIO_LGP4 | BADGE4_GPIO_LGP5 |
             BADGE4_GPIO_LGP6 | BADGE4_GPIO_LGP7 |
             BADGE4_GPIO_LGP8 | BADGE4_GPIO_LGP9 |
             BADGE4_GPIO_GPA_VID | BADGE4_GPIO_GPB_VID |
             BADGE4_GPIO_GPC_VID);
      GPDR &= ~BADGE4_GPIO_INT_VID;
      GPDR |= (BADGE4_GPIO_LGP2 | BADGE4_GPIO_LGP3 |
             BADGE4_GPIO_LGP4 | BADGE4_GPIO_LGP5 |
             BADGE4_GPIO_LGP6 | BADGE4_GPIO_LGP7 |
             BADGE4_GPIO_LGP8 | BADGE4_GPIO_LGP9 |
             BADGE4_GPIO_GPA_VID | BADGE4_GPIO_GPB_VID |
             BADGE4_GPIO_GPC_VID);

      /* SDRAM SPD i2c */
      GPCR  = (BADGE4_GPIO_SDSDA | BADGE4_GPIO_SDSCL);
      GPDR |= (BADGE4_GPIO_SDSDA | BADGE4_GPIO_SDSCL);

      /* uart */
      GPCR  = (BADGE4_GPIO_UART_HS1 | BADGE4_GPIO_UART_HS2);
      GPDR |= (BADGE4_GPIO_UART_HS1 | BADGE4_GPIO_UART_HS2);

      /* CPLD muxsel0 input for mux/adc chip select */
      GPCR  = BADGE4_GPIO_MUXSEL0;
      GPDR |= BADGE4_GPIO_MUXSEL0;

      /* test points: J5, J6 as inputs, J7 outputs */
      GPDR &= ~(BADGE4_GPIO_TESTPT_J5 | BADGE4_GPIO_TESTPT_J6);
      GPCR  = BADGE4_GPIO_TESTPT_J7;
      GPDR |= BADGE4_GPIO_TESTPT_J7;

      /* 5V supply rail. */
      GPCR  = BADGE4_GPIO_PCMEN5V;        /* initially off */
      GPDR |= BADGE4_GPIO_PCMEN5V;

      /* CPLD sdram type inputs; set up by blob */
      //GPDR |= (BADGE4_GPIO_SDTYP1 | BADGE4_GPIO_SDTYP0);
      printk(KERN_DEBUG __FILE__ ": SDRAM CPLD typ1=%d typ0=%d\n",
             !!(GPLR & BADGE4_GPIO_SDTYP1),
             !!(GPLR & BADGE4_GPIO_SDTYP0));

      /* SA1111 reset pin; set up by blob */
      //GPSR  = BADGE4_GPIO_SA1111_NRST;
      //GPDR |= BADGE4_GPIO_SA1111_NRST;


      /* power management cruft */
      PGSR = 0;
      PWER = 0;
      PCFR = 0;
      PSDR = 0;

      PWER |= PWER_GPIO26;    /* wake up on an edge from TESTPT_J5 */
      PWER |= PWER_RTC; /* wake up if rtc fires */

      /* drive sa1111_nrst during sleep */
      PGSR |= BADGE4_GPIO_SA1111_NRST;
      /* drive CPLD as is during sleep */
      PGSR |= (GPLR & (BADGE4_GPIO_SDTYP0|BADGE4_GPIO_SDTYP1));


      /* Now bring up the SA-1111. */
      ret = badge4_sa1111_init();
      if (ret < 0)
            printk(KERN_ERR
                   "%s: SA-1111 initialization failed (%d)\n",
                   __func__, ret);


      /* maybe turn on 5v0 from the start */
      badge4_set_5V(BADGE4_5V_INITIALLY, five_v_on);

      sa11x0_set_flash_data(&badge4_flash_data, &badge4_flash_resource, 1);

      return 0;
}

arch_initcall(badge4_init);


static unsigned badge4_5V_bitmap = 0;

void badge4_set_5V(unsigned subsystem, int on)
{
      unsigned long flags;
      unsigned old_5V_bitmap;

      local_irq_save(flags);

      old_5V_bitmap = badge4_5V_bitmap;

      if (on) {
            badge4_5V_bitmap |= subsystem;
      } else {
            badge4_5V_bitmap &= ~subsystem;
      }

      /* detect on->off and off->on transitions */
      if ((!old_5V_bitmap) && (badge4_5V_bitmap)) {
            /* was off, now on */
            printk(KERN_INFO "%s: enabling 5V supply rail\n", __func__);
            GPSR = BADGE4_GPIO_PCMEN5V;
      } else if ((old_5V_bitmap) && (!badge4_5V_bitmap)) {
            /* was on, now off */
            printk(KERN_INFO "%s: disabling 5V supply rail\n", __func__);
            GPCR = BADGE4_GPIO_PCMEN5V;
      }

      local_irq_restore(flags);
}
EXPORT_SYMBOL(badge4_set_5V);


static struct map_desc badge4_io_desc[] __initdata = {
      {     /* SRAM  bank 1 */
            .virtual    = 0xf1000000,
            .pfn        = __phys_to_pfn(0x08000000),
            .length           = 0x00100000,
            .type       = MT_DEVICE
      }, {  /* SRAM  bank 2 */
            .virtual    = 0xf2000000,
            .pfn        = __phys_to_pfn(0x10000000),
            .length           = 0x00100000,
            .type       = MT_DEVICE
      }, {  /* SA-1111      */
            .virtual    = 0xf4000000,
            .pfn        = __phys_to_pfn(0x48000000),
            .length           = 0x00100000,
            .type       = MT_DEVICE
      }
};

static void
badge4_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
{
      if (!state) {
            Ser1SDCR0 |= SDCR0_UART;
      }
}

static struct sa1100_port_fns badge4_port_fns __initdata = {
      //.get_mctrl      = badge4_get_mctrl,
      //.set_mctrl      = badge4_set_mctrl,
      .pm         = badge4_uart_pm,
};

static void __init badge4_map_io(void)
{
      sa1100_map_io();
      iotable_init(badge4_io_desc, ARRAY_SIZE(badge4_io_desc));

      sa1100_register_uart_fns(&badge4_port_fns);
      sa1100_register_uart(0, 3);
      sa1100_register_uart(1, 1);
}

MACHINE_START(BADGE4, "Hewlett-Packard Laboratories BadgePAD 4")
      .phys_io    = 0x80000000,
      .io_pg_offst      = ((0xf8000000) >> 18) & 0xfffc,
      .boot_params      = 0xc0000100,
      .map_io           = badge4_map_io,
      .init_irq   = sa1100_init_irq,
      .timer            = &sa1100_timer,
MACHINE_END

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