arch/arm/mach-sa1100/hackkit.c

   1 /*
   2  * linux/arch/arm/mach-sa1100/hackkit.c
   3  *
   4  * Copyright (C) 2002 Stefan Eletzhofer <stefan.eletzhofer@eletztrick.de>
   5  *
   6  * This file contains all HackKit tweaks. Based on original work from
   7  * Nicolas Pitre's assabet fixes
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  */
  14 #include <linux/init.h>
  15 #include <linux/kernel.h>
  16 #include <linux/sched.h>
  17 #include <linux/tty.h>
  18 #include <linux/module.h>
  19 #include <linux/errno.h>
  20 #include <linux/cpufreq.h>
  21 #include <linux/serial_core.h>
  22 #include <linux/mtd/mtd.h>
  23 #include <linux/mtd/partitions.h>
  24
  25 #include <asm/mach-types.h>
  26 #include <asm/setup.h>
  27 #include <asm/page.h>
  28 #include <asm/pgtable.h>
  29
  30 #include <asm/mach/arch.h>
  31 #include <asm/mach/flash.h>
  32 #include <asm/mach/map.h>
  33 #include <asm/mach/irq.h>
  34 #include <asm/mach/serial_sa1100.h>
  35
  36 #include <mach/hardware.h>
  37 #include <mach/irqs.h>
  38
  39 #include "generic.h"
  40
  41 /**********************************************************************
  42  *  prototypes
  43  */
  44
  45 /* init funcs */
  46 static void __init hackkit_map_io(void);
  47
  48 static u_int hackkit_get_mctrl(struct uart_port *port);
  49 static void hackkit_set_mctrl(struct uart_port *port, u_int mctrl);
  50 static void hackkit_uart_pm(struct uart_port *port, u_int state, u_int oldstate);
  51
  52 /**********************************************************************
  53  *  global data
  54  */
  55
  56 /**********************************************************************
  57  *  static data
  58  */
  59
  60 static struct map_desc hackkit_io_desc[] __initdata = {
  61         {       /* Flash bank 0 */
  62                 .virtual        =  0xe8000000,
  63                 .pfn            = __phys_to_pfn(0x00000000),
  64                 .length         = 0x01000000,
  65                 .type           = MT_DEVICE
  66         },
  67 };
  68
  69 static struct sa1100_port_fns hackkit_port_fns __initdata = {
  70         .set_mctrl      = hackkit_set_mctrl,
  71         .get_mctrl      = hackkit_get_mctrl,
  72         .pm             = hackkit_uart_pm,
  73 };
  74
  75 /**********************************************************************
  76  *  Static functions
  77  */
  78
  79 static void __init hackkit_map_io(void)
  80 {
  81         sa1100_map_io();
  82         iotable_init(hackkit_io_desc, ARRAY_SIZE(hackkit_io_desc));
  83
  84         sa1100_register_uart_fns(&hackkit_port_fns);
  85         sa1100_register_uart(0, 1);     /* com port */
  86         sa1100_register_uart(1, 2);
  87         sa1100_register_uart(2, 3);     /* radio module */
  88
  89         Ser1SDCR0 |= SDCR0_SUS;
  90 }
  91
  92 /**
  93  *      hackkit_uart_pm - powermgmt callback function for system 3 UART
  94  *      @port: uart port structure
  95  *      @state: pm state
  96  *      @oldstate: old pm state
  97  *
  98  */
  99 static void hackkit_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
 100 {
 101         /* TODO: switch on/off uart in powersave mode */
 102 }
 103
 104 /*
 105  * Note! this can be called from IRQ context.
 106  * FIXME: No modem ctrl lines yet.
 107  */
 108 static void hackkit_set_mctrl(struct uart_port *port, u_int mctrl)
 109 {
 110 #if 0
 111         if (port->mapbase == _Ser1UTCR0) {
 112                 u_int set = 0, clear = 0;
 113
 114                 if (mctrl & TIOCM_RTS)
 115                         set |= PT_CTRL2_RS1_RTS;
 116                 else
 117                         clear |= PT_CTRL2_RS1_RTS;
 118
 119                 if (mctrl & TIOCM_DTR)
 120                         set |= PT_CTRL2_RS1_DTR;
 121                 else
 122                         clear |= PT_CTRL2_RS1_DTR;
 123
 124                 PTCTRL2_clear(clear);
 125                 PTCTRL2_set(set);
 126         }
 127 #endif
 128 }
 129
 130 static u_int hackkit_get_mctrl(struct uart_port *port)
 131 {
 132         u_int ret = 0;
 133 #if 0
 134         u_int irqsr = PT_IRQSR;
 135
 136         /* need 2 reads to read current value */
 137         irqsr = PT_IRQSR;
 138
 139         /* TODO: check IRQ source register for modem/com
 140          status lines and set them correctly. */
 141 #endif
 142
 143         ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
 144
 145         return ret;
 146 }
 147
 148 static struct mtd_partition hackkit_partitions[] = {
 149         {
 150                 .name           = "BLOB",
 151                 .size           = 0x00040000,
 152                 .offset         = 0x00000000,
 153                 .mask_flags     = MTD_WRITEABLE,  /* force read-only */
 154         }, {
 155                 .name           = "config",
 156                 .size           = 0x00040000,
 157                 .offset         = MTDPART_OFS_APPEND,
 158         }, {
 159                 .name           = "kernel",
 160                 .size           = 0x00100000,
 161                 .offset         = MTDPART_OFS_APPEND,
 162         }, {
 163                 .name           = "initrd",
 164                 .size           = 0x00180000,
 165                 .offset         = MTDPART_OFS_APPEND,
 166         }, {
 167                 .name           = "rootfs",
 168                 .size           = 0x700000,
 169                 .offset         = MTDPART_OFS_APPEND,
 170         }, {
 171                 .name           = "data",
 172                 .size           = MTDPART_SIZ_FULL,
 173                 .offset         = MTDPART_OFS_APPEND,
 174         }
 175 };
 176
 177 static struct flash_platform_data hackkit_flash_data = {
 178         .map_name       = "cfi_probe",
 179         .parts          = hackkit_partitions,
 180         .nr_parts       = ARRAY_SIZE(hackkit_partitions),
 181 };
 182
 183 static struct resource hackkit_flash_resource =
 184         DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M);
 185
 186 static void __init hackkit_init(void)
 187 {
 188         sa11x0_register_mtd(&hackkit_flash_data, &hackkit_flash_resource, 1);
 189 }
 190
 191 /**********************************************************************
 192  *  Exported Functions
 193  */
 194
 195 MACHINE_START(HACKKIT, "HackKit Cpu Board")
 196         .atag_offset    = 0x100,
 197         .map_io         = hackkit_map_io,
 198         .nr_irqs        = SA1100_NR_IRQS,
 199         .init_irq       = sa1100_init_irq,
 200         .timer          = &sa1100_timer,
 201         .init_machine   = hackkit_init,
 202         .restart        = sa11x0_restart,
 203 MACHINE_END