LXR linux/arch/arm/mach-sa1100/badge4.c

   1/*
   2 * linux/arch/arm/mach-sa1100/badge4.c
   3 *
   4 * BadgePAD 4 specific initialization
   5 *
   6 *   Tim Connors <connors@hpl.hp.com>
   7 *   Christopher Hoover <ch@hpl.hp.com>
   8 *
   9 * Copyright (C) 2002 Hewlett-Packard Company
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License version 2 as
  13 * published by the Free Software Foundation.
  14 *
  15 */
  16#include <linux/module.h>
  17#include <linux/init.h>
  18#include <linux/kernel.h>
  19#include <linux/platform_device.h>
  20#include <linux/delay.h>
  21#include <linux/tty.h>
  22#include <linux/mtd/mtd.h>
  23#include <linux/mtd/partitions.h>
  24#include <linux/errno.h>
  25
  26#include <mach/hardware.h>
  27#include <asm/mach-types.h>
  28#include <asm/setup.h>
  29#include <mach/irqs.h>
  30
  31#include <asm/mach/arch.h>
  32#include <asm/mach/flash.h>
  33#include <asm/mach/map.h>
  34#include <asm/hardware/sa1111.h>
  35#include <asm/mach/serial_sa1100.h>
  36
  37#include <mach/badge4.h>
  38
  39#include "generic.h"
  40
  41static struct resource sa1111_resources[] = {
  42        [0] = {
  43                .start          = BADGE4_SA1111_BASE,
  44                .end            = BADGE4_SA1111_BASE + 0x00001fff,
  45                .flags          = IORESOURCE_MEM,
  46        },
  47        [1] = {
  48                .start          = BADGE4_IRQ_GPIO_SA1111,
  49                .end            = BADGE4_IRQ_GPIO_SA1111,
  50                .flags          = IORESOURCE_IRQ,
  51        },
  52};
  53
  54static u64 sa1111_dmamask = 0xffffffffUL;
  55
  56static struct platform_device sa1111_device = {
  57        .name           = "sa1111",
  58        .id             = 0,
  59        .dev            = {
  60                .dma_mask = &sa1111_dmamask,
  61                .coherent_dma_mask = 0xffffffff,
  62        },
  63        .num_resources  = ARRAY_SIZE(sa1111_resources),
  64        .resource       = sa1111_resources,
  65};
  66
  67static struct platform_device *devices[] __initdata = {
  68        &sa1111_device,
  69};
  70
  71static int __init badge4_sa1111_init(void)
  72{
  73        /*
  74         * Ensure that the memory bus request/grant signals are setup,
  75         * and the grant is held in its inactive state
  76         */
  77        sa1110_mb_disable();
  78
  79        /*
  80         * Probe for SA1111.
  81         */
  82        return platform_add_devices(devices, ARRAY_SIZE(devices));
  83}
  84
  85
  86/*
  87 * 1 x Intel 28F320C3 Advanced+ Boot Block Flash (32 Mi bit)
  88 *   Eight 4 KiW Parameter Bottom Blocks (64 KiB)
  89 *   Sixty-three 32 KiW Main Blocks (4032 Ki b)
  90 *
  91 * <or>
  92 *
  93 * 1 x Intel 28F640C3 Advanced+ Boot Block Flash (64 Mi bit)
  94 *   Eight 4 KiW Parameter Bottom Blocks (64 KiB)
  95 *   One-hundred-twenty-seven 32 KiW Main Blocks (8128 Ki b)
  96 */
  97static struct mtd_partition badge4_partitions[] = {
  98        {
  99                .name   = "BLOB boot loader",
 100                .offset = 0,
 101                .size   = 0x0000A000
 102        }, {
 103                .name   = "params",
 104                .offset = MTDPART_OFS_APPEND,
 105                .size   = 0x00006000
 106        }, {
 107                .name   = "root",
 108                .offset = MTDPART_OFS_APPEND,
 109                .size   = MTDPART_SIZ_FULL
 110        }
 111};
 112
 113static struct flash_platform_data badge4_flash_data = {
 114        .map_name       = "cfi_probe",
 115        .parts          = badge4_partitions,
 116        .nr_parts       = ARRAY_SIZE(badge4_partitions),
 117};
 118
 119static struct resource badge4_flash_resource = {
 120        .start          = SA1100_CS0_PHYS,
 121        .end            = SA1100_CS0_PHYS + SZ_64M - 1,
 122        .flags          = IORESOURCE_MEM,
 123};
 124
 125static int five_v_on __initdata = 0;
 126
 127static int __init five_v_on_setup(char *ignore)
 128{
 129        five_v_on = 1;
 130        return 1;
 131}
 132__setup("five_v_on", five_v_on_setup);
 133
 134
 135static int __init badge4_init(void)
 136{
 137        int ret;
 138
 139        if (!machine_is_badge4())
 140                return -ENODEV;
 141
 142        /* LCD */
 143        GPCR  = (BADGE4_GPIO_LGP2 | BADGE4_GPIO_LGP3 |
 144                 BADGE4_GPIO_LGP4 | BADGE4_GPIO_LGP5 |
 145                 BADGE4_GPIO_LGP6 | BADGE4_GPIO_LGP7 |
 146                 BADGE4_GPIO_LGP8 | BADGE4_GPIO_LGP9 |
 147                 BADGE4_GPIO_GPA_VID | BADGE4_GPIO_GPB_VID |
 148                 BADGE4_GPIO_GPC_VID);
 149        GPDR &= ~BADGE4_GPIO_INT_VID;
 150        GPDR |= (BADGE4_GPIO_LGP2 | BADGE4_GPIO_LGP3 |
 151                 BADGE4_GPIO_LGP4 | BADGE4_GPIO_LGP5 |
 152                 BADGE4_GPIO_LGP6 | BADGE4_GPIO_LGP7 |
 153                 BADGE4_GPIO_LGP8 | BADGE4_GPIO_LGP9 |
 154                 BADGE4_GPIO_GPA_VID | BADGE4_GPIO_GPB_VID |
 155                 BADGE4_GPIO_GPC_VID);
 156
 157        /* SDRAM SPD i2c */
 158        GPCR  = (BADGE4_GPIO_SDSDA | BADGE4_GPIO_SDSCL);
 159        GPDR |= (BADGE4_GPIO_SDSDA | BADGE4_GPIO_SDSCL);
 160
 161        /* uart */
 162        GPCR  = (BADGE4_GPIO_UART_HS1 | BADGE4_GPIO_UART_HS2);
 163        GPDR |= (BADGE4_GPIO_UART_HS1 | BADGE4_GPIO_UART_HS2);
 164
 165        /* CPLD muxsel0 input for mux/adc chip select */
 166        GPCR  = BADGE4_GPIO_MUXSEL0;
 167        GPDR |= BADGE4_GPIO_MUXSEL0;
 168
 169        /* test points: J5, J6 as inputs, J7 outputs */
 170        GPDR &= ~(BADGE4_GPIO_TESTPT_J5 | BADGE4_GPIO_TESTPT_J6);
 171        GPCR  = BADGE4_GPIO_TESTPT_J7;
 172        GPDR |= BADGE4_GPIO_TESTPT_J7;
 173
 174        /* 5V supply rail. */
 175        GPCR  = BADGE4_GPIO_PCMEN5V;            /* initially off */
 176        GPDR |= BADGE4_GPIO_PCMEN5V;
 177
 178        /* CPLD sdram type inputs; set up by blob */
 179        //GPDR |= (BADGE4_GPIO_SDTYP1 | BADGE4_GPIO_SDTYP0);
 180        printk(KERN_DEBUG __FILE__ ": SDRAM CPLD typ1=%d typ0=%d\n",
 181                !!(GPLR & BADGE4_GPIO_SDTYP1),
 182                !!(GPLR & BADGE4_GPIO_SDTYP0));
 183
 184        /* SA1111 reset pin; set up by blob */
 185        //GPSR  = BADGE4_GPIO_SA1111_NRST;
 186        //GPDR |= BADGE4_GPIO_SA1111_NRST;
 187
 188
 189        /* power management cruft */
 190        PGSR = 0;
 191        PWER = 0;
 192        PCFR = 0;
 193        PSDR = 0;
 194
 195        PWER |= PWER_GPIO26;    /* wake up on an edge from TESTPT_J5 */
 196        PWER |= PWER_RTC;       /* wake up if rtc fires */
 197
 198        /* drive sa1111_nrst during sleep */
 199        PGSR |= BADGE4_GPIO_SA1111_NRST;
 200        /* drive CPLD as is during sleep */
 201        PGSR |= (GPLR & (BADGE4_GPIO_SDTYP0|BADGE4_GPIO_SDTYP1));
 202
 203
 204        /* Now bring up the SA-1111. */
 205        ret = badge4_sa1111_init();
 206        if (ret < 0)
 207                printk(KERN_ERR
 208                        "%s: SA-1111 initialization failed (%d)\n",
 209                        __func__, ret);
 210
 211
 212        /* maybe turn on 5v0 from the start */
 213        badge4_set_5V(BADGE4_5V_INITIALLY, five_v_on);
 214
 215        sa11x0_set_flash_data(&badge4_flash_data, &badge4_flash_resource, 1);
 216
 217        return 0;
 218}
 219
 220arch_initcall(badge4_init);
 221
 222
 223static unsigned badge4_5V_bitmap = 0;
 224
 225void badge4_set_5V(unsigned subsystem, int on)
 226{
 227        unsigned long flags;
 228        unsigned old_5V_bitmap;
 229
 230        local_irq_save(flags);
 231
 232        old_5V_bitmap = badge4_5V_bitmap;
 233
 234        if (on) {
 235                badge4_5V_bitmap |= subsystem;
 236        } else {
 237                badge4_5V_bitmap &= ~subsystem;
 238        }
 239
 240        /* detect on->off and off->on transitions */
 241        if ((!old_5V_bitmap) && (badge4_5V_bitmap)) {
 242                /* was off, now on */
 243                printk(KERN_INFO "%s: enabling 5V supply rail\n", __func__);
 244                GPSR = BADGE4_GPIO_PCMEN5V;
 245        } else if ((old_5V_bitmap) && (!badge4_5V_bitmap)) {
 246                /* was on, now off */
 247                printk(KERN_INFO "%s: disabling 5V supply rail\n", __func__);
 248                GPCR = BADGE4_GPIO_PCMEN5V;
 249        }
 250
 251        local_irq_restore(flags);
 252}
 253EXPORT_SYMBOL(badge4_set_5V);
 254
 255
 256static struct map_desc badge4_io_desc[] __initdata = {
 257        {       /* SRAM  bank 1 */
 258                .virtual        = 0xf1000000,
 259                .pfn            = __phys_to_pfn(0x08000000),
 260                .length         = 0x00100000,
 261                .type           = MT_DEVICE
 262        }, {    /* SRAM  bank 2 */
 263                .virtual        = 0xf2000000,
 264                .pfn            = __phys_to_pfn(0x10000000),
 265                .length         = 0x00100000,
 266                .type           = MT_DEVICE
 267        }, {    /* SA-1111      */
 268                .virtual        = 0xf4000000,
 269                .pfn            = __phys_to_pfn(0x48000000),
 270                .length         = 0x00100000,
 271                .type           = MT_DEVICE
 272        }
 273};
 274
 275static void
 276badge4_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
 277{
 278        if (!state) {
 279                Ser1SDCR0 |= SDCR0_UART;
 280        }
 281}
 282
 283static struct sa1100_port_fns badge4_port_fns __initdata = {
 284        //.get_mctrl    = badge4_get_mctrl,
 285        //.set_mctrl    = badge4_set_mctrl,
 286        .pm             = badge4_uart_pm,
 287};
 288
 289static void __init badge4_map_io(void)
 290{
 291        sa1100_map_io();
 292        iotable_init(badge4_io_desc, ARRAY_SIZE(badge4_io_desc));
 293
 294        sa1100_register_uart_fns(&badge4_port_fns);
 295        sa1100_register_uart(0, 3);
 296        sa1100_register_uart(1, 1);
 297}
 298
 299MACHINE_START(BADGE4, "Hewlett-Packard Laboratories BadgePAD 4")
 300        .phys_io        = 0x80000000,
 301        .io_pg_offst    = ((0xf8000000) >> 18) & 0xfffc,
 302        .boot_params    = 0xc0000100,
 303        .map_io         = badge4_map_io,
 304        .init_irq       = sa1100_init_irq,
 305        .timer          = &sa1100_timer,
 306MACHINE_END
 307