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rockbox/apps/plugins/iriver_flash.c
Miika Pekkarinen e1eb91b976 Bootloader support to search firmware also from flash. Bootloader <-> 
Rockbox communication when Rockbox has been flashed.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10499 a1c6a512-1295-4272-9138-f99709370657
2006-08-09 12:04:13 +00:00

571 lines
16 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* !!! DON'T MESS WITH THIS CODE UNLESS YOU'RE ABSOLUTELY SURE WHAT YOU DO !!!
*
* Copyright (C) 2006 by Miika Pekkarinen
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "plugin.h"
/* All CFI flash routines are copied and ported from firmware_flash.c */
#ifndef SIMULATOR /* only for target */
unsigned char *audiobuf;
int audiobuf_size;
#if defined(IRIVER_H120)
#define PLATFORM_ID ID_IRIVER_H100
#else
#undef PLATFORM_ID /* this platform is not (yet) flashable */
#endif
#ifdef PLATFORM_ID
PLUGIN_HEADER
#if CONFIG_KEYPAD == IRIVER_H100_PAD
#define KEY1 BUTTON_OFF
#define KEY2 BUTTON_ON
#define KEY3 BUTTON_SELECT
#define KEYNAME1 "[Stop]"
#define KEYNAME2 "[On]"
#define KEYNAME3 "[Select]"
#endif
struct flash_info
{
uint8_t manufacturer;
uint8_t id;
int size;
char name[32];
};
static struct plugin_api* rb; /* here is a global api struct pointer */
#ifdef IRIVER_H100_SERIES
#define SEC_SIZE 4096
#define BOOTLOADER_ERASEGUARD (BOOTLOADER_ENTRYPOINT / SEC_SIZE - 1)
static volatile uint16_t* FB = (uint16_t*)0x00000000; /* Flash base address */
#endif
/* read the manufacturer and device ID */
bool cfi_read_id(volatile uint16_t* pBase, uint8_t* pManufacturerID, uint8_t* pDeviceID)
{
uint8_t not_manu, not_id; /* read values before switching to ID mode */
uint8_t manu, id; /* read values when in ID mode */
pBase = (uint16_t*)((uint32_t)pBase & 0xFFF80000); /* down to 512k align */
/* read the normal content */
not_manu = pBase[0]; /* should be 'A' (0x41) and 'R' (0x52) */
not_id = pBase[1]; /* from the "ARCH" marker */
pBase[0x5555] = 0xAA; /* enter command mode */
pBase[0x2AAA] = 0x55;
pBase[0x5555] = 0x90; /* ID command */
rb->sleep(HZ/50); /* Atmel wants 20ms pause here */
manu = pBase[0];
id = pBase[1];
pBase[0] = 0xF0; /* reset flash (back to normal read mode) */
rb->sleep(HZ/50); /* Atmel wants 20ms pause here */
/* I assume success if the obtained values are different from
the normal flash content. This is not perfectly bulletproof, they
could theoretically be the same by chance, causing us to fail. */
if (not_manu != manu || not_id != id) /* a value has changed */
{
*pManufacturerID = manu; /* return the results */
*pDeviceID = id;
return true; /* success */
}
return false; /* fail */
}
/* erase the sector which contains the given address */
bool cfi_erase_sector(volatile uint16_t* pAddr)
{
unsigned timeout = 430000; /* the timeout loop should be no less than 25ms */
FB[0x5555] = 0xAA; /* enter command mode */
FB[0x2AAA] = 0x55;
FB[0x5555] = 0x80; /* erase command */
FB[0x5555] = 0xAA; /* enter command mode */
FB[0x2AAA] = 0x55;
*pAddr = 0x30; /* erase the sector */
/* I counted 7 instructions for this loop -> min. 0.58 us per round */
/* Plus memory waitstates it will be much more, gives margin */
while (*pAddr != 0xFFFF && --timeout); /* poll for erased */
return (timeout != 0);
}
/* address must be in an erased location */
inline bool cfi_program_word(volatile uint16_t* pAddr, uint16_t data)
{
unsigned timeout = 85; /* the timeout loop should be no less than 20us */
if (~*pAddr & data) /* just a safety feature, not really necessary */
return false; /* can't set any bit from 0 to 1 */
FB[0x5555] = 0xAA; /* enter command mode */
FB[0x2AAA] = 0x55;
FB[0x5555] = 0xA0; /* byte program command */
*pAddr = data;
/* I counted 7 instructions for this loop -> min. 0.58 us per round */
/* Plus memory waitstates it will be much more, gives margin */
while (*pAddr != data && --timeout); /* poll for programmed */
return (timeout != 0);
}
/* this returns true if supported and fills the info struct */
bool cfi_get_flash_info(struct flash_info* pInfo)
{
rb->memset(pInfo, 0, sizeof(struct flash_info));
if (!cfi_read_id(FB, &pInfo->manufacturer, &pInfo->id))
return false;
if (pInfo->manufacturer == 0xBF) /* SST */
{
if (pInfo->id == 0xD6)
{
pInfo->size = 256* 1024; /* 256k */
rb->strcpy(pInfo->name, "SST39VF020");
return true;
}
else if (pInfo->id == 0xD7)
{
pInfo->size = 512* 1024; /* 512k */
rb->strcpy(pInfo->name, "SST39VF040");
return true;
}
else if (pInfo->id == 0x82)
{
pInfo->size = 2048* 1024; /* 2 MiB */
rb->strcpy(pInfo->name, "SST39VF160");
return true;
}
else
return false;
}
return false;
}
/*********** Utility Functions ************/
/* Tool function to calculate a CRC32 across some buffer */
/* third argument is either 0xFFFFFFFF to start or value from last piece */
unsigned crc_32(unsigned char* buf, unsigned len, unsigned crc32)
{
/* CCITT standard polynomial 0x04C11DB7 */
static const unsigned crc32_lookup[16] =
{ /* lookup table for 4 bits at a time is affordable */
0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9,
0x130476DC, 0x17C56B6B, 0x1A864DB2, 0x1E475005,
0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61,
0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD
};
unsigned char byte;
unsigned t;
while (len--)
{
byte = *buf++; /* get one byte of data */
/* upper nibble of our data */
t = crc32 >> 28; /* extract the 4 most significant bits */
t ^= byte >> 4; /* XOR in 4 bits of data into the extracted bits */
crc32 <<= 4; /* shift the CRC register left 4 bits */
crc32 ^= crc32_lookup[t]; /* do the table lookup and XOR the result */
/* lower nibble of our data */
t = crc32 >> 28; /* extract the 4 most significant bits */
t ^= byte & 0x0F; /* XOR in 4 bits of data into the extracted bits */
crc32 <<= 4; /* shift the CRC register left 4 bits */
crc32 ^= crc32_lookup[t]; /* do the table lookup and XOR the result */
}
return crc32;
}
/***************** User Interface Functions *****************/
int WaitForButton(void)
{
int button;
do
{
button = rb->button_get(true);
} while (button & BUTTON_REL);
return button;
}
/* helper for DoUserDialog() */
void ShowFlashInfo(struct flash_info* pInfo)
{
char buf[32];
if (!pInfo->manufacturer)
{
rb->lcd_puts(0, 0, "Flash: M=?? D=??");
rb->lcd_puts(0, 1, "Impossible to program");
}
else
{
rb->snprintf(buf, sizeof(buf), "Flash: M=%02x D=%02x",
pInfo->manufacturer, pInfo->id);
rb->lcd_puts(0, 0, buf);
if (pInfo->size)
{
rb->lcd_puts(0, 1, pInfo->name);
rb->snprintf(buf, sizeof(buf), "Size: %d KB", pInfo->size / 1024);
rb->lcd_puts(0, 2, buf);
}
else
{
rb->lcd_puts(0, 1, "Unsupported chip");
}
}
rb->lcd_update();
}
int load_firmware_file(const char *filename, uint32_t *checksum)
{
int fd;
int len, rc;
int i;
uint32_t sum;
fd = rb->open(filename, O_RDONLY);
if (fd < 0)
return -1;
len = rb->filesize(fd);
if (audiobuf_size < len)
{
rb->splash(HZ*3, true, "Out of memory!");
rb->close(fd);
return -2;
}
rb->read(fd, checksum, 4);
rb->lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
len -= FIRMWARE_OFFSET_FILE_DATA;
rc = rb->read(fd, audiobuf, len);
rb->close(fd);
if (rc != len)
{
rb->splash(HZ*3, true, "Read failure");
return -3;
}
/* Verify the checksum */
sum = 0;
for (i = 0; i < len; i++)
sum += audiobuf[i];
if (sum != *checksum)
{
rb->splash(HZ*3, true, "Checksums mismatch!");
return -4;
}
return len;
}
int flash_rockbox(const char *filename)
{
struct flash_header hdr;
char buf[32];
int pos, i, len, rc;
unsigned long checksum, sum;
unsigned char *p8;
uint16_t *p16;
len = load_firmware_file(filename, &checksum);
if (len < 0)
return len * 10;
/* Erase the program flash. */
for (i = 1; i < BOOTLOADER_ERASEGUARD && (i-1)*4096 < len + 32; i++)
{
rc = cfi_erase_sector(FB + (SEC_SIZE/2) * i);
rb->snprintf(buf, sizeof(buf), "Erase: 0x%03x (%d)", i, rc);
rb->lcd_puts(0, 3, buf);
rb->lcd_update();
}
/* Write the magic and size. */
rb->memset(&hdr, 0, sizeof(struct flash_header));
hdr.magic = FLASH_MAGIC;
hdr.length = len;
// rb->strncpy(hdr.version, APPSVERSION, sizeof(hdr.version)-1);
p16 = (uint16_t *)&hdr;
rb->snprintf(buf, sizeof(buf), "Programming");
rb->lcd_puts(0, 4, buf);
rb->lcd_update();
pos = FLASH_ENTRYPOINT/2;
for (i = 0; i < (long)sizeof(struct flash_header)/2; i++)
{
cfi_program_word(FB + pos, p16[i]);
pos++;
}
p16 = (uint16_t *)audiobuf;
for (i = 0; i < len/2 && pos < (BOOTLOADER_ENTRYPOINT/2); i++)
cfi_program_word(FB + pos + i, p16[i]);
/* Verify */
p8 = (char *)FLASH_ENTRYPOINT;
p8 += sizeof(struct flash_header);
sum = 0;
for (i = 0; i < len; i++)
sum += p8[i];
if (sum != checksum)
{
rb->splash(HZ*3, true, "Verify failed!");
/* Erase the magic sector so bootloader does not try to load
* rockbox from flash and crash. */
cfi_erase_sector(FB + SEC_SIZE/2);
return -5;
}
return 0;
}
void show_fatal_error(void)
{
rb->splash(HZ*30, true, "Disable idle poweroff, connect AC power and DON'T TURN PLAYER OFF!!");
rb->splash(HZ*30, true, "Contact Rockbox developers as soon as possible!");
rb->splash(HZ*30, true, "Your device won't be bricked unless you turn off the power");
rb->splash(HZ*30, true, "Don't use the device before further instructions from Rockbox developers");
}
int flash_bootloader(const char *filename)
{
char buf[32];
int pos, i, len, rc;
unsigned long checksum, sum, crc32;
unsigned char *p8;
uint16_t *p16;
(void)buf;
len = load_firmware_file(filename, &checksum);
if (len < 0)
return len * 10;
if (len > 0xFFFF)
{
rb->splash(HZ*3, true, "Too big bootloader");
return -1;
}
/* Verify the crc32 checksum also. */
crc32 = crc_32(audiobuf, len, 0xffffffff);
#if 0
rb->snprintf(buf, sizeof buf, "crc32 = 0x%08x", crc32);
rb->splash(HZ*10, true, buf);
#else
if (crc32 != 0xa930906d)
{
rb->splash(HZ*3, true, "Untested bootloader");
return -2;
}
#endif
rb->lcd_puts(0, 3, "Processing critical sections...");
rb->lcd_update();
/* Erase the boot sector and write a proper reset vector. */
cfi_erase_sector(FB);
p16 = (uint16_t *)audiobuf;
for (i = 0; i < 4; i++)
cfi_program_word(FB + i, p16[i]);
/* Erase the bootloader flash section. */
for (i = BOOTLOADER_ENTRYPOINT/SEC_SIZE; i < 0x200; i++)
rc = cfi_erase_sector(FB + (SEC_SIZE/2) * i);
pos = BOOTLOADER_ENTRYPOINT/2;
p16 = (uint16_t *)audiobuf;
for (i = 0; i < len/2; i++)
cfi_program_word(FB + pos + i, p16[i]);
/* Verify */
p8 = (char *)BOOTLOADER_ENTRYPOINT;
sum = 0;
for (i = 0; i < len; i++)
sum += p8[i];
if (sum != checksum)
{
rb->splash(HZ*3, true, "Verify failed!");
show_fatal_error();
return -5;
}
p8 = (char *)FB;
for (i = 0; i < 8; i++)
{
if (p8[i] != audiobuf[i])
{
rb->splash(HZ*3, true, "Bootvector corrupt!");
show_fatal_error();
break;
}
}
return 0;
}
/* Kind of our main function, defines the application flow. */
void DoUserDialog(char* filename)
{
struct flash_info fi;
int rc; /* generic return code */
/* this can only work if Rockbox runs in DRAM, not flash ROM */
if ((uint16_t*)rb >= FB && (uint16_t*)rb < FB + 4096*1024) /* 4 MB max */
{ /* we're running from flash */
rb->splash(HZ*3, true, "Not from ROM");
return; /* exit */
}
/* refuse to work if the power may fail meanwhile */
if (!rb->battery_level_safe())
{
rb->splash(HZ*3, true, "Battery too low!");
return; /* exit */
}
rb->lcd_setfont(FONT_SYSFIXED);
rc = cfi_get_flash_info(&fi);
ShowFlashInfo(&fi);
if (fi.size == 0) /* no valid chip */
{
rb->splash(HZ*3, true, "Sorry!");
return; /* exit */
}
/* Debug? */
#if 0
rb->memcpy(&hdr, (uint8_t *)(FLASH_ENTRYPOINT), sizeof(struct flash_header));
rb->snprintf(buf, sizeof(buf), "Magic: 0x%03x", hdr.magic);
rb->lcd_puts(0, 3, buf);
rb->snprintf(buf, sizeof(buf), "Size: 0x%03x", hdr.length);
rb->lcd_puts(0, 4, buf);
rb->lcd_update();
rb->sleep(HZ*10);
rb->memcpy(&hdr, (uint8_t *)(FLASH_ENTRYPOINT/2), sizeof(struct flash_header));
rb->snprintf(buf, sizeof(buf), "Magic: 0x%03x", hdr.magic);
rb->lcd_puts(0, 3, buf);
rb->snprintf(buf, sizeof(buf), "Size: 0x%03x", hdr.length);
rb->lcd_puts(0, 4, buf);
rb->lcd_update();
rb->sleep(HZ*10);
#endif
/* Restore? */
#if 0
fd = rb->open("/internal_rom_000000-1FFFFF.bin", O_RDONLY);
if (fd < 0)
return ;
len = rb->filesize(fd);
/* Erase the program flash. */
for (i = 1; i < 0x1EF; i++)
{
rc = cfi_erase_sector(FB + (SEC_SIZE/2) * i);
rb->snprintf(buf, sizeof(buf), "Erase: 0x%03x (%d)", i, rc);
rb->lcd_puts(0, 3, buf);
rb->lcd_update();
}
i = FLASH_ENTRYPOINT/2;
rb->lseek(fd, i*2, SEEK_SET);
len -= i*2 - 0xffff;
for (; len > 0 && i < (0x1F0000/2); i++)
{
rb->read(fd, bytes, 2);
cfi_program_word(FB + i, (bytes[0] << 8) | bytes[1]);
len -= 2;
}
rb->close(fd);
return ;
#endif
if (filename == NULL)
{
rb->splash(HZ*3, true, "Please use this plugin with \"Open with...\"");
return ;
}
audiobuf = rb->plugin_get_audio_buffer(&audiobuf_size);
if (rb->strcasestr(filename, "/rockbox.iriver"))
flash_rockbox(filename);
else if (rb->strcasestr(filename, "/bootloader.iriver"))
flash_bootloader(filename);
else
rb->splash(HZ*3, true, "Unknown file type");
}
/***************** Plugin Entry Point *****************/
enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
int oldmode;
rb = api; /* copy to global api pointer */
/* now go ahead and have fun! */
oldmode = rb->system_memory_guard(MEMGUARD_NONE); /*disable memory guard */
DoUserDialog((char*) parameter);
rb->system_memory_guard(oldmode); /* re-enable memory guard */
return PLUGIN_OK;
}
#endif /* ifdef PLATFORM_ID */
#endif /* #ifndef SIMULATOR */
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