release/src-rt-6.x.4708/linux/linux-2.6.36/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
  41 static 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
  54 static struct sa1111_platform_data sa1111_info = {
  55         .irq_base       = IRQ_BOARD_END,
  56 };
  57
  58 static u64 sa1111_dmamask = 0xffffffffUL;
  59
  60 static struct platform_device sa1111_device = {
  61         .name           = "sa1111",
  62         .id             = 0,
  63         .dev            = {
  64                 .dma_mask = &sa1111_dmamask,
  65                 .coherent_dma_mask = 0xffffffff,
  66                 .platform_data = &sa1111_info,
  67         },
  68         .num_resources  = ARRAY_SIZE(sa1111_resources),
  69         .resource       = sa1111_resources,
  70 };
  71
  72 static struct platform_device *devices[] __initdata = {
  73         &sa1111_device,
  74 };
  75
  76 static int __init badge4_sa1111_init(void)
  77 {
  78         /*
  79          * Ensure that the memory bus request/grant signals are setup,
  80          * and the grant is held in its inactive state
  81          */
  82         sa1110_mb_disable();
  83
  84         /*
  85          * Probe for SA1111.
  86          */
  87         return platform_add_devices(devices, ARRAY_SIZE(devices));
  88 }
  89
  90
  91 /*
  92  * 1 x Intel 28F320C3 Advanced+ Boot Block Flash (32 Mi bit)
  93  *   Eight 4 KiW Parameter Bottom Blocks (64 KiB)
  94  *   Sixty-three 32 KiW Main Blocks (4032 Ki b)
  95  *
  96  * <or>
  97  *
  98  * 1 x Intel 28F640C3 Advanced+ Boot Block Flash (64 Mi bit)
  99  *   Eight 4 KiW Parameter Bottom Blocks (64 KiB)
 100  *   One-hundred-twenty-seven 32 KiW Main Blocks (8128 Ki b)
 101  */
 102 static struct mtd_partition badge4_partitions[] = {
 103         {
 104                 .name   = "BLOB boot loader",
 105                 .offset = 0,
 106                 .size   = 0x0000A000
 107         }, {
 108                 .name   = "params",
 109                 .offset = MTDPART_OFS_APPEND,
 110                 .size   = 0x00006000
 111         }, {
 112                 .name   = "root",
 113                 .offset = MTDPART_OFS_APPEND,
 114                 .size   = MTDPART_SIZ_FULL
 115         }
 116 };
 117
 118 static struct flash_platform_data badge4_flash_data = {
 119         .map_name       = "cfi_probe",
 120         .parts          = badge4_partitions,
 121         .nr_parts       = ARRAY_SIZE(badge4_partitions),
 122 };
 123
 124 static struct resource badge4_flash_resource = {
 125         .start          = SA1100_CS0_PHYS,
 126         .end            = SA1100_CS0_PHYS + SZ_64M - 1,
 127         .flags          = IORESOURCE_MEM,
 128 };
 129
 130 static int five_v_on __initdata = 0;
 131
 132 static int __init five_v_on_setup(char *ignore)
 133 {
 134         five_v_on = 1;
 135         return 1;
 136 }
 137 __setup("five_v_on", five_v_on_setup);
 138
 139
 140 static int __init badge4_init(void)
 141 {
 142         int ret;
 143
 144         if (!machine_is_badge4())
 145                 return -ENODEV;
 146
 147         /* LCD */
 148         GPCR  = (BADGE4_GPIO_LGP2 | BADGE4_GPIO_LGP3 |
 149                  BADGE4_GPIO_LGP4 | BADGE4_GPIO_LGP5 |
 150                  BADGE4_GPIO_LGP6 | BADGE4_GPIO_LGP7 |
 151                  BADGE4_GPIO_LGP8 | BADGE4_GPIO_LGP9 |
 152                  BADGE4_GPIO_GPA_VID | BADGE4_GPIO_GPB_VID |
 153                  BADGE4_GPIO_GPC_VID);
 154         GPDR &= ~BADGE4_GPIO_INT_VID;
 155         GPDR |= (BADGE4_GPIO_LGP2 | BADGE4_GPIO_LGP3 |
 156                  BADGE4_GPIO_LGP4 | BADGE4_GPIO_LGP5 |
 157                  BADGE4_GPIO_LGP6 | BADGE4_GPIO_LGP7 |
 158                  BADGE4_GPIO_LGP8 | BADGE4_GPIO_LGP9 |
 159                  BADGE4_GPIO_GPA_VID | BADGE4_GPIO_GPB_VID |
 160                  BADGE4_GPIO_GPC_VID);
 161
 162         /* SDRAM SPD i2c */
 163         GPCR  = (BADGE4_GPIO_SDSDA | BADGE4_GPIO_SDSCL);
 164         GPDR |= (BADGE4_GPIO_SDSDA | BADGE4_GPIO_SDSCL);
 165
 166         /* uart */
 167         GPCR  = (BADGE4_GPIO_UART_HS1 | BADGE4_GPIO_UART_HS2);
 168         GPDR |= (BADGE4_GPIO_UART_HS1 | BADGE4_GPIO_UART_HS2);
 169
 170         /* CPLD muxsel0 input for mux/adc chip select */
 171         GPCR  = BADGE4_GPIO_MUXSEL0;
 172         GPDR |= BADGE4_GPIO_MUXSEL0;
 173
 174         /* test points: J5, J6 as inputs, J7 outputs */
 175         GPDR &= ~(BADGE4_GPIO_TESTPT_J5 | BADGE4_GPIO_TESTPT_J6);
 176         GPCR  = BADGE4_GPIO_TESTPT_J7;
 177         GPDR |= BADGE4_GPIO_TESTPT_J7;
 178
 179         /* 5V supply rail. */
 180         GPCR  = BADGE4_GPIO_PCMEN5V;            /* initially off */
 181         GPDR |= BADGE4_GPIO_PCMEN5V;
 182
 183         /* CPLD sdram type inputs; set up by blob */
 184         //GPDR |= (BADGE4_GPIO_SDTYP1 | BADGE4_GPIO_SDTYP0);
 185         printk(KERN_DEBUG __FILE__ ": SDRAM CPLD typ1=%d typ0=%d\n",
 186                 !!(GPLR & BADGE4_GPIO_SDTYP1),
 187                 !!(GPLR & BADGE4_GPIO_SDTYP0));
 188
 189         /* SA1111 reset pin; set up by blob */
 190         //GPSR  = BADGE4_GPIO_SA1111_NRST;
 191         //GPDR |= BADGE4_GPIO_SA1111_NRST;
 192
 193
 194         /* power management cruft */
 195         PGSR = 0;
 196         PWER = 0;
 197         PCFR = 0;
 198         PSDR = 0;
 199
 200         PWER |= PWER_GPIO26;    /* wake up on an edge from TESTPT_J5 */
 201         PWER |= PWER_RTC;       /* wake up if rtc fires */
 202
 203         /* drive sa1111_nrst during sleep */
 204         PGSR |= BADGE4_GPIO_SA1111_NRST;
 205         /* drive CPLD as is during sleep */
 206         PGSR |= (GPLR & (BADGE4_GPIO_SDTYP0|BADGE4_GPIO_SDTYP1));
 207
 208
 209         /* Now bring up the SA-1111. */
 210         ret = badge4_sa1111_init();
 211         if (ret < 0)
 212                 printk(KERN_ERR
 213                         "%s: SA-1111 initialization failed (%d)\n",
 214                         __func__, ret);
 215
 216
 217         /* maybe turn on 5v0 from the start */
 218         badge4_set_5V(BADGE4_5V_INITIALLY, five_v_on);
 219
 220         sa11x0_register_mtd(&badge4_flash_data, &badge4_flash_resource, 1);
 221
 222         return 0;
 223 }
 224
 225 arch_initcall(badge4_init);
 226
 227
 228 static unsigned badge4_5V_bitmap = 0;
 229
 230 void badge4_set_5V(unsigned subsystem, int on)
 231 {
 232         unsigned long flags;
 233         unsigned old_5V_bitmap;
 234
 235         local_irq_save(flags);
 236
 237         old_5V_bitmap = badge4_5V_bitmap;
 238
 239         if (on) {
 240                 badge4_5V_bitmap |= subsystem;
 241         } else {
 242                 badge4_5V_bitmap &= ~subsystem;
 243         }
 244
 245         /* detect on->off and off->on transitions */
 246         if ((!old_5V_bitmap) && (badge4_5V_bitmap)) {
 247                 /* was off, now on */
 248                 printk(KERN_INFO "%s: enabling 5V supply rail\n", __func__);
 249                 GPSR = BADGE4_GPIO_PCMEN5V;
 250         } else if ((old_5V_bitmap) && (!badge4_5V_bitmap)) {
 251                 /* was on, now off */
 252                 printk(KERN_INFO "%s: disabling 5V supply rail\n", __func__);
 253                 GPCR = BADGE4_GPIO_PCMEN5V;
 254         }
 255
 256         local_irq_restore(flags);
 257 }
 258 EXPORT_SYMBOL(badge4_set_5V);
 259
 260
 261 static struct map_desc badge4_io_desc[] __initdata = {
 262         {       /* SRAM  bank 1 */
 263                 .virtual        = 0xf1000000,
 264                 .pfn            = __phys_to_pfn(0x08000000),
 265                 .length         = 0x00100000,
 266                 .type           = MT_DEVICE
 267         }, {    /* SRAM  bank 2 */
 268                 .virtual        = 0xf2000000,
 269                 .pfn            = __phys_to_pfn(0x10000000),
 270                 .length         = 0x00100000,
 271                 .type           = MT_DEVICE
 272         }, {    /* SA-1111      */
 273                 .virtual        = 0xf4000000,
 274                 .pfn            = __phys_to_pfn(0x48000000),
 275                 .length         = 0x00100000,
 276                 .type           = MT_DEVICE
 277         }
 278 };
 279
 280 static void
 281 badge4_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
 282 {
 283         if (!state) {
 284                 Ser1SDCR0 |= SDCR0_UART;
 285         }
 286 }
 287
 288 static struct sa1100_port_fns badge4_port_fns __initdata = {
 289         //.get_mctrl    = badge4_get_mctrl,
 290         //.set_mctrl    = badge4_set_mctrl,
 291         .pm             = badge4_uart_pm,
 292 };
 293
 294 static void __init badge4_map_io(void)
 295 {
 296         sa1100_map_io();
 297         iotable_init(badge4_io_desc, ARRAY_SIZE(badge4_io_desc));
 298
 299         sa1100_register_uart_fns(&badge4_port_fns);
 300         sa1100_register_uart(0, 3);
 301         sa1100_register_uart(1, 1);
 302 }
 303
 304 MACHINE_START(BADGE4, "Hewlett-Packard Laboratories BadgePAD 4")
 305         .phys_io        = 0x80000000,
 306         .io_pg_offst    = ((0xf8000000) >> 18) & 0xfffc,
 307         .boot_params    = 0xc0000100,
 308         .map_io         = badge4_map_io,
 309         .init_irq       = sa1100_init_irq,
 310         .timer          = &sa1100_timer,
 311 MACHINE_END