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 <asm/hardware.h>
  27 #include <asm/mach-types.h>
  28 #include <asm/setup.h>
  29 #include <asm/arch/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 <asm/arch/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 u64 sa1111_dmamask = 0xffffffffUL;
  55
  56 static 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
  67 static struct platform_device *devices[] __initdata = {
  68         &sa1111_device,
  69 };
  70
  71 static 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  */
  97 static 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
 113 static 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
 119 static struct resource badge4_flash_resource = {
 120         .start          = SA1100_CS0_PHYS,
 121         .end            = SA1100_CS0_PHYS + SZ_64M - 1,
 122         .flags          = IORESOURCE_MEM,
 123 };
 124
 125 static int five_v_on __initdata = 0;
 126
 127 static 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
 135 static 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                        __FUNCTION__, 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
 220 arch_initcall(badge4_init);
 221
 222
 223 static unsigned badge4_5V_bitmap = 0;
 224
 225 void 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", __FUNCTION__);
 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", __FUNCTION__);
 248                 GPCR = BADGE4_GPIO_PCMEN5V;
 249         }
 250
 251         local_irq_restore(flags);
 252 }
 253 EXPORT_SYMBOL(badge4_set_5V);
 254
 255
 256 static 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
 275 static void
 276 badge4_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
 277 {
 278         if (!state) {
 279                 Ser1SDCR0 |= SDCR0_UART;
 280         }
 281 }
 282
 283 static 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
 289 static 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
 299 MACHINE_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,
 306 MACHINE_END