bootloader/ipod.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 by Dave Chapman
  11  *
  12  * Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
  13  * and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
  14  *
  15  * All files in this archive are subject to the GNU General Public License.
  16  * See the file COPYING in the source tree root for full license agreement.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  ****************************************************************************/
  22 #include "config.h"
  23
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <stdarg.h>
  28 #include "cpu.h"
  29 #include "system.h"
  30 #include "lcd.h"
  31 #include "kernel.h"
  32 #include "thread.h"
  33 #include "ata.h"
  34 #include "fat.h"
  35 #include "disk.h"
  36 #include "font.h"
  37 #include "adc.h"
  38 #include "backlight-target.h"
  39 #include "panic.h"
  40 #include "power.h"
  41 #include "file.h"
  42 #include "common.h"
  43
  44 #define XSC(X) #X
  45 #define SC(X) XSC(X)
  46
  47 /* Maximum allowed firmware image size. The largest known current
  48    (December 2006) firmware is about 7.5MB (Apple's firmware for the ipod video)
  49    so we set this to 8MB. */
  50 #define MAX_LOADSIZE (8*1024*1024)
  51
  52 /* A buffer to load the Linux kernel or Rockbox into */
  53 unsigned char *loadbuffer = (unsigned char *)DRAM_START;
  54
  55 /* Bootloader version */
  56 char version[] = APPSVERSION;
  57
  58 #define IPOD_HW_REVISION (*((volatile unsigned long*)(0x00002084)))
  59
  60 /* We copy the hardware revision to the last four bytes of SDRAM and then
  61    re-read it after we have re-mapped SDRAM to 0x0 in Rockbox */
  62 #define TMP_IPOD_HW_REVISION (*((volatile unsigned long*)(0x11fffffc)))
  63
  64 #define BUTTON_LEFT  1
  65 #define BUTTON_MENU  2
  66 #define BUTTON_RIGHT 3
  67 #define BUTTON_PLAY  4
  68 #define BUTTON_HOLD  5
  69
  70 #if CONFIG_KEYPAD == IPOD_4G_PAD && !defined(IPOD_MINI)
  71 /* check if number of seconds has past */
  72 int timer_check(int clock_start, unsigned int usecs)
  73 {
  74     if ((USEC_TIMER - clock_start) >= usecs) {
  75         return 1;
  76     } else {
  77         return 0;
  78     }
  79 }
  80
  81 static void ser_opto_keypad_cfg(int val)
  82 {
  83     int start_time;
  84
  85     GPIOB_ENABLE &=~ 0x80;
  86
  87     outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
  88     outl(val, 0x7000c120);
  89     outl(inl(0x7000c100) | 0x80000000, 0x7000c100);
  90
  91     GPIOB_OUTPUT_VAL &=~ 0x10;
  92     GPIOB_OUTPUT_EN  |=  0x10;
  93
  94     start_time = USEC_TIMER;
  95     do {
  96         if ((inl(0x7000c104) & 0x80000000) == 0) {
  97             break;
  98         }
  99     } while (timer_check(start_time, 1500) != 0);
 100
 101     outl(inl(0x7000c100) & ~0x80000000, 0x7000c100);
 102
 103     GPIOB_ENABLE     |= 0x80;
 104     GPIOB_OUTPUT_VAL |= 0x10;
 105     GPIOB_OUTPUT_EN  &=~0x10;
 106
 107     outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
 108     outl(inl(0x7000c100) | 0x60000000, 0x7000c100);
 109 }
 110
 111 int opto_keypad_read(void)
 112 {
 113     int loop_cnt, had_io = 0;
 114
 115     for (loop_cnt = 5; loop_cnt != 0;)
 116     {
 117         int key_pressed = 0;
 118         int start_time;
 119         unsigned int key_pad_val;
 120
 121         ser_opto_keypad_cfg(0x8000023a);
 122
 123         start_time = USEC_TIMER;
 124         do {
 125             if (inl(0x7000c104) & 0x4000000) {
 126                 had_io = 1;
 127                 break;
 128             }
 129
 130             if (had_io != 0) {
 131                 break;
 132             }
 133         } while (timer_check(start_time, 1500) != 0);
 134
 135         key_pad_val = inl(0x7000c140);
 136         if ((key_pad_val & ~0x7fff0000) != 0x8000023a) {
 137             loop_cnt--;
 138         } else {
 139             key_pad_val = (key_pad_val << 11) >> 27;
 140             key_pressed = 1;
 141         }
 142
 143         outl(inl(0x7000c100) | 0x60000000, 0x7000c100);
 144         outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
 145
 146         if (key_pressed != 0) {
 147             return key_pad_val ^ 0x1f;
 148         }
 149     }
 150
 151     return 0;
 152 }
 153 #endif
 154
 155 static int key_pressed(void)
 156 {
 157     unsigned char state;
 158
 159 #if CONFIG_KEYPAD == IPOD_4G_PAD
 160 #ifdef IPOD_MINI /* mini 1G only */
 161     state = GPIOA_INPUT_VAL & 0x3f;
 162     if ((state & 0x10) == 0) return BUTTON_LEFT;
 163     if ((state & 0x2) == 0) return BUTTON_MENU;
 164     if ((state & 0x4) == 0) return BUTTON_PLAY;
 165     if ((state & 0x8) == 0) return BUTTON_RIGHT;
 166 #else
 167     state = opto_keypad_read();
 168     if ((state & 0x4) == 0) return BUTTON_LEFT;
 169     if ((state & 0x10) == 0) return BUTTON_MENU;
 170     if ((state & 0x8) == 0) return BUTTON_PLAY;
 171     if ((state & 0x2) == 0) return BUTTON_RIGHT;
 172 #endif
 173 #elif CONFIG_KEYPAD == IPOD_3G_PAD
 174     state = inb(0xcf000030);
 175     if (((state & 0x20) == 0)) return BUTTON_HOLD; /* hold on */
 176     if ((state & 0x08) == 0) return BUTTON_LEFT;
 177     if ((state & 0x10) == 0) return BUTTON_MENU;
 178     if ((state & 0x04) == 0) return BUTTON_PLAY;
 179     if ((state & 0x01) == 0) return BUTTON_RIGHT;
 180 #endif
 181     return 0;
 182 }
 183
 184 /* This function is the same on all ipods */
 185 bool button_hold(void)
 186 {
 187     return (GPIOA_INPUT_VAL & 0x20)?false:true;
 188 }
 189
 190 void fatal_error(void)
 191 {
 192     extern int line;
 193     bool holdstatus=false;
 194
 195     /* System font is 6 pixels wide */
 196 #if LCD_WIDTH >= (30*6)
 197     printf("Hold MENU+SELECT to reboot");
 198     printf("then SELECT+PLAY for disk mode");
 199 #else
 200     printf("Hold MENU+SELECT to");
 201     printf("reboot then SELECT+PLAY");
 202     printf("for disk mode");
 203 #endif
 204     lcd_update();
 205
 206     while (1) {
 207         if (button_hold() != holdstatus) {
 208             if (button_hold()) {
 209                 holdstatus=true;
 210                 lcd_puts(0, line, "Hold switch on!");
 211             } else {
 212                 holdstatus=false;
 213                 lcd_puts(0, line, "               ");
 214             }
 215             lcd_update();
 216         }
 217         udelay(100000); /* 100ms */
 218     }
 219
 220 }
 221
 222
 223 void* main(void)
 224 {
 225     char buf[256];
 226     int i;
 227     int btn;
 228     int rc;
 229     bool haveretailos;
 230     bool button_was_held;
 231     struct partinfo* pinfo;
 232     unsigned short* identify_info;
 233
 234     /* Check the button hold status as soon as possible - to
 235        give the user maximum chance to turn it off in order to
 236        reset the settings in rockbox. */
 237     button_was_held = button_hold();
 238
 239     /* Turn on the backlight */
 240
 241     __backlight_on();
 242
 243     TMP_IPOD_HW_REVISION = IPOD_HW_REVISION;
 244     ipod_hw_rev = IPOD_HW_REVISION;
 245
 246     system_init();
 247     kernel_init();
 248     lcd_init();
 249     font_init();
 250
 251 #ifdef HAVE_LCD_COLOR
 252     lcd_set_foreground(LCD_WHITE);
 253     lcd_set_background(LCD_BLACK);
 254     lcd_clear_display();
 255 #endif
 256
 257 #if 0
 258     /* ADC and button drivers are not yet implemented */
 259     adc_init();
 260     button_init();
 261 #endif
 262
 263     btn=key_pressed();
 264
 265     /* Enable bootloader messages */
 266     if (btn==BUTTON_RIGHT)
 267         verbose = true;
 268
 269     lcd_setfont(FONT_SYSFIXED);
 270
 271     printf("Rockbox boot loader");
 272     printf("Version: %s", version);
 273     printf("IPOD version: 0x%08x", IPOD_HW_REVISION);
 274
 275     i=ata_init();
 276     if (i==0) {
 277       identify_info=ata_get_identify();
 278       /* Show model */
 279       for (i=0; i < 20; i++) {
 280         ((unsigned short*)buf)[i]=htobe16(identify_info[i+27]);
 281       }
 282       buf[40]=0;
 283       for (i=39; i && buf[i]==' '; i--) {
 284         buf[i]=0;
 285       }
 286       printf(buf);
 287     } else {
 288       printf("ATA: %d", i);
 289     }
 290
 291     disk_init();
 292     rc = disk_mount_all();
 293     if (rc<=0)
 294     {
 295         printf("No partition found");
 296         fatal_error();
 297     }
 298
 299     pinfo = disk_partinfo(1);
 300     printf("Partition 1: 0x%02x %ld MB",
 301            pinfo->type, pinfo->size / 2048);
 302
 303
 304     if (button_was_held || (btn==BUTTON_MENU)) {
 305         /* If either the hold switch was on, or the Menu button was held, then
 306            try the Apple firmware */
 307
 308         printf("Loading original firmware...");
 309
 310         /* First try an apple_os.ipod file on the FAT32 partition
 311            (either in .rockbox or the root)
 312          */
 313
 314         rc=load_firmware(loadbuffer, "apple_os.ipod", MAX_LOADSIZE);
 315
 316         if (rc == EOK) {
 317             printf("apple_os.ipod loaded.");
 318             return (void*)DRAM_START;
 319         } else if (rc == EFILE_NOT_FOUND) {
 320             /* If apple_os.ipod doesn't exist, then check if there is an Apple
 321                firmware image in RAM  */
 322             haveretailos = (memcmp((void*)(DRAM_START+0x20),"portalplayer",12)==0);
 323             if (haveretailos) {
 324                 /* We have a copy of the retailos in RAM, lets just run it. */
 325                 return (void*)DRAM_START;
 326             }
 327         } else if (rc < EFILE_NOT_FOUND) {
 328             printf("Error!");
 329             printf("Can't load apple_os.ipod:");
 330             printf(strerror(rc));
 331         }
 332
 333         /* Everything failed - just loop forever */
 334         printf("No RetailOS detected");
 335
 336     } else if (btn==BUTTON_PLAY) {
 337         printf("Loading Linux...");
 338         rc=load_raw_firmware(loadbuffer, "/linux.bin", MAX_LOADSIZE);
 339         if (rc < EOK) {
 340             printf("Error!");
 341             printf("Can't load linux.bin:");
 342             printf(strerror(rc));
 343         } else {
 344             return (void*)DRAM_START;
 345         }
 346     } else {
 347         printf("Loading Rockbox...");
 348         rc=load_firmware(loadbuffer, BOOTFILE, MAX_LOADSIZE);
 349         if (rc < EOK) {
 350             printf("Error!");
 351             printf("Can't load rockbox.ipod:");
 352             printf(strerror(rc));
 353         } else {
 354             printf("Rockbox loaded.");
 355             return (void*)DRAM_START;
 356         }
 357     }
 358
 359     /* If we get to here, then we haven't been able to load any firmware */
 360     fatal_error();
 361
 362     /* We never get here, but keep gcc happy */
 363     return (void*)0;
 364 }
 365
 366 /* These functions are present in the firmware library, but we reimplement
 367    them here because the originals do a lot more than we want */
 368 void usb_acknowledge(void)
 369 {
 370 }
 371
 372 void usb_wait_for_disconnect(void)
 373 {
 374 }