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hackkit.c

/*
 * linux/arch/arm/mach-sa1100/hackkit.c
 *
 * Copyright (C) 2002 Stefan Eletzhofer <stefan.eletzhofer@eletztrick.de>
 *
 * This file contains all HackKit tweaks. Based on original work from
 * Nicolas Pitre's assabet fixes
 *
 * 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/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/tty.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/cpufreq.h>
#include <linux/serial_core.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/irq.h>

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

#include "generic.h"

/**********************************************************************
 *  prototypes
 */

/* init funcs */
static void __init hackkit_map_io(void);

static u_int hackkit_get_mctrl(struct uart_port *port);
static void hackkit_set_mctrl(struct uart_port *port, u_int mctrl);
static void hackkit_uart_pm(struct uart_port *port, u_int state, u_int oldstate);

/**********************************************************************
 *  global data
 */

/**********************************************************************
 *  static data
 */

static struct map_desc hackkit_io_desc[] __initdata = {
      {     /* Flash bank 0 */
            .virtual    =  0xe8000000,
            .pfn        = __phys_to_pfn(0x00000000),
            .length           = 0x01000000,
            .type       = MT_DEVICE
      },
};

static struct sa1100_port_fns hackkit_port_fns __initdata = {
      .set_mctrl  = hackkit_set_mctrl,
      .get_mctrl  = hackkit_get_mctrl,
      .pm         = hackkit_uart_pm,
};

/**********************************************************************
 *  Static functions
 */

static void __init hackkit_map_io(void)
{
      sa1100_map_io();
      iotable_init(hackkit_io_desc, ARRAY_SIZE(hackkit_io_desc));

      sa1100_register_uart_fns(&hackkit_port_fns);
      sa1100_register_uart(0, 1);   /* com port */
      sa1100_register_uart(1, 2);
      sa1100_register_uart(2, 3);   /* radio module */

      Ser1SDCR0 |= SDCR0_SUS;
}

/**
 *    hackkit_uart_pm - powermgmt callback function for system 3 UART
 *    @port: uart port structure
 *    @state: pm state
 *    @oldstate: old pm state
 *
 */
static void hackkit_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
{
      /* TODO: switch on/off uart in powersave mode */
}

/*
 * Note! this can be called from IRQ context.
 * FIXME: No modem ctrl lines yet.
 */
static void hackkit_set_mctrl(struct uart_port *port, u_int mctrl)
{
#if 0
      if (port->mapbase == _Ser1UTCR0) {
            u_int set = 0, clear = 0;

            if (mctrl & TIOCM_RTS)
                  set |= PT_CTRL2_RS1_RTS;
            else
                  clear |= PT_CTRL2_RS1_RTS;

            if (mctrl & TIOCM_DTR)
                  set |= PT_CTRL2_RS1_DTR;
            else
                  clear |= PT_CTRL2_RS1_DTR;

            PTCTRL2_clear(clear);
            PTCTRL2_set(set);
      }
#endif
}

static u_int hackkit_get_mctrl(struct uart_port *port)
{
      u_int ret = 0;
#if 0
      u_int irqsr = PT_IRQSR;

      /* need 2 reads to read current value */
      irqsr = PT_IRQSR;

      /* TODO: check IRQ source register for modem/com
       status lines and set them correctly. */
#endif

      ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;

      return ret;
}

static struct mtd_partition hackkit_partitions[] = {
      {
            .name       = "BLOB",
            .size       = 0x00040000,
            .offset           = 0x00000000,
            .mask_flags = MTD_WRITEABLE,  /* force read-only */
      }, {
            .name       = "config",
            .size       = 0x00040000,
            .offset           = MTDPART_OFS_APPEND,
      }, {
            .name       = "kernel",
            .size       = 0x00100000,
            .offset           = MTDPART_OFS_APPEND,
      }, {
            .name       = "initrd",
            .size       = 0x00180000,
            .offset           = MTDPART_OFS_APPEND,
      }, {
            .name       = "rootfs",
            .size       = 0x700000,
            .offset           = MTDPART_OFS_APPEND,
      }, {
            .name       = "data",
            .size       = MTDPART_SIZ_FULL,
            .offset           = MTDPART_OFS_APPEND,
      }
};

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

static struct resource hackkit_flash_resource = {
      .start            = SA1100_CS0_PHYS,
      .end        = SA1100_CS0_PHYS + SZ_32M,
      .flags            = IORESOURCE_MEM,
};

static void __init hackkit_init(void)
{
      sa11x0_set_flash_data(&hackkit_flash_data, &hackkit_flash_resource, 1);
}

/**********************************************************************
 *  Exported Functions
 */

MACHINE_START(HACKKIT, "HackKit Cpu Board")
      .phys_io    = 0x80000000,
      .io_pg_offst      = ((0xf8000000) >> 18) & 0xfffc,
      .boot_params      = 0xc0000100,
      .map_io           = hackkit_map_io,
      .init_irq   = sa1100_init_irq,
      .timer            = &sa1100_timer,
      .init_machine     = hackkit_init,
MACHINE_END

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