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rockbox/bootloader/sansaconnect.c
Tomasz Moń 2acf8db3e1
Sansa Connect: Power off LCD to save power 
Prevent startup screen flash by properly using AVR LCM functions. Power
off LCD when not needed to improve battery runtime.

Change-Id: I76e3c5c0208774f189fbc6f7d7b3c9e22c062285
2021-07-05 15:19:52 +02:00

324 lines
8.2 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id: $
*
* Copyright (C) 2011-2021 by Tomasz Moń
*
* 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 "system.h"
#include "lcd.h"
#include "../kernel-internal.h"
#include "storage.h"
#include "file_internal.h"
#include "disk.h"
#include "font.h"
#include "backlight.h"
#include "button.h"
#include "common.h"
#include "rb-loader.h"
#include "version.h"
#include "uart-target.h"
#include "power.h"
#include "loader_strerror.h"
#include "usb.h"
#define FLASH_BASE 0x00100000
#define PARAMETERS_FLASH_OFFSET 0x00010000
#define PARAMETERS_SIZE_BYTES 0x00010000
#define PARAMETERS_NUM 32
#define FLASH_WRITE(addr, val) *(volatile uint16_t *)(FLASH_BASE + addr) = val
#define FLASH_READ(addr) *(volatile uint16_t *)(FLASH_BASE + addr)
#define PARAMETER_TYPE_BINARY 0xF00FB00B
#define PARAMETER_TYPE_LONGBIN 0xBEADFEAD
#define PARAMETER_TYPE_STRING 0xBEEFFACE
typedef struct
{
uint32_t magic;
char name[60];
char value[192];
} parameter_t;
/* Cache all parameters because parameters are stored on a single erase block */
static union
{
parameter_t entry[PARAMETERS_NUM];
/* raw consists of parameter_t array and bootloader graphics */
uint16_t raw[PARAMETERS_SIZE_BYTES/sizeof(uint16_t)];
} parameters;
static void parameters_load_from_flash(void)
{
uint32_t offset = PARAMETERS_FLASH_OFFSET;
uint16_t *dst = parameters.raw;
while (offset < (PARAMETERS_FLASH_OFFSET + PARAMETERS_SIZE_BYTES))
{
*dst++ = FLASH_READ(offset);
offset += sizeof(uint16_t);
}
}
void parameters_erase(void) __attribute__ ((section(".icode")));
void parameters_erase(void)
{
uint32_t offset = PARAMETERS_FLASH_OFFSET;
while (offset < (PARAMETERS_FLASH_OFFSET + PARAMETERS_SIZE_BYTES))
{
if (FLASH_READ(offset) != 0xFFFF)
{
/* Found programmed halfword */
break;
}
offset += sizeof(uint16_t);
}
if (offset >= (PARAMETERS_FLASH_OFFSET + PARAMETERS_SIZE_BYTES))
{
/* Flash is already erased */
return;
}
/* Execute Block Erase sequence */
FLASH_WRITE(0xAAA, 0xAA);
FLASH_WRITE(0x554, 0x55);
FLASH_WRITE(0xAAA, 0x80);
FLASH_WRITE(0xAAA, 0xAA);
FLASH_WRITE(0x554, 0x55);
FLASH_WRITE(PARAMETERS_FLASH_OFFSET, 0x30);
/* Erase finishes once we read 0xFFFF on previously programmed halfword
* Typical block erase time is 0.7 s, maximum 15 s. Do not check the
* timeout here because we have to wait until the erase finishes as most
* of Rockbox bootloader code executes from flash.
*/
do
{
/* Discard caches to force reads from memory */
commit_discard_idcache();
}
while (FLASH_READ(offset) != 0xFFFF);
}
void parameters_write_to_flash(void) __attribute__ ((section(".icode")));
void parameters_write_to_flash(void)
{
uint16_t *src = parameters.raw;
uint32_t offset = PARAMETERS_FLASH_OFFSET;
while (offset < (PARAMETERS_FLASH_OFFSET + PARAMETERS_SIZE_BYTES))
{
if (FLASH_READ(offset) != *src)
{
/* Program halfword */
FLASH_WRITE(0xAAA, 0xAA);
FLASH_WRITE(0x554, 0x55);
FLASH_WRITE(0xAAA, 0xA0);
FLASH_WRITE(offset, *src);
/* Word programming time typical is 14 us, maximum 330 us */
do
{
/* Discard caches to force reads from memory */
commit_discard_idcache();
}
while (FLASH_READ(offset) != *src);
}
offset += sizeof(uint16_t);
src++;
}
}
static void clear_recoverzap(void)
{
int i;
bool needs_reflash = false;
parameters_load_from_flash();
for (i = 0; i < PARAMETERS_NUM; i++)
{
if ((parameters.entry[i].magic == PARAMETER_TYPE_STRING) &&
(!strcmp("recoverzap", parameters.entry[i].name)))
{
memset(&parameters.entry[i], 0xFF, sizeof(parameter_t));
needs_reflash = true;
}
}
if (needs_reflash)
{
int cpsr = disable_interrupt_save(IRQ_FIQ_STATUS);
printf("Erasing OF parameters memory");
parameters_erase();
printf("Flashing OF parameters");
parameters_write_to_flash();
printf("Cleared recoverzap parameter");
restore_interrupt(cpsr);
}
}
static void handle_usb(int connect_timeout)
{
long end_tick = 0;
if (usb_detect() != USB_INSERTED)
{
return;
}
usb_init();
usb_start_monitoring();
printf("USB: Connecting");
if (connect_timeout != TIMEOUT_BLOCK)
{
end_tick = current_tick + connect_timeout;
}
while (usb_detect() == USB_INSERTED)
{
if (button_get_w_tmo(HZ/2) == SYS_USB_CONNECTED)
{
printf("Bootloader USB mode");
usb_acknowledge(SYS_USB_CONNECTED_ACK);
while (button_get_w_tmo(HZ/2) != SYS_USB_DISCONNECTED)
{
storage_spin();
}
break;
}
if (connect_timeout != TIMEOUT_BLOCK &&
TIME_AFTER(current_tick, end_tick))
{
printf("USB: Timed out");
break;
}
}
usb_close();
}
extern void show_logo(void);
void main(void)
{
unsigned char* loadbuffer;
int buffer_size;
int(*kernel_entry)(void);
int ret;
int btn;
/* Make sure interrupts are disabled */
set_irq_level(IRQ_DISABLED);
set_fiq_status(FIQ_DISABLED);
system_init();
kernel_init();
/* Now enable interrupts */
set_irq_level(IRQ_ENABLED);
set_fiq_status(FIQ_ENABLED);
lcd_init();
backlight_init(); /* BUGFIX backlight_init MUST BE AFTER lcd_init */
font_init();
button_init();
lcd_enable(true);
lcd_setfont(FONT_SYSFIXED);
reset_screen();
show_logo();
printf("Rockbox boot loader");
printf("Version %s", rbversion);
clear_recoverzap();
ret = storage_init();
if(ret)
printf("SD error: %d", ret);
filesystem_init();
handle_usb(2*HZ);
ret = disk_mount_all();
if (ret <= 0)
error(EDISK, ret, true);
btn = button_read_device();
if (btn & BUTTON_PREV)
{
printf("Loading OF firmware...");
printf("Loading vmlinux.bin...");
loadbuffer = (unsigned char*)0x01008000;
buffer_size = 0x200000;
ret = load_raw_firmware(loadbuffer, "/vmlinux.bin", buffer_size);
if (ret < 0)
{
printf("Unable to load vmlinux.bin");
}
else
{
printf("Loading initrd.bin...");
loadbuffer = (unsigned char*)0x04400020;
buffer_size = 0x200000;
ret = load_raw_firmware(loadbuffer, "/initrd.bin", buffer_size);
}
if (ret > 0)
{
lcd_enable(false);
system_prepare_fw_start();
kernel_entry = (void*)0x01008000;
ret = kernel_entry();
lcd_enable(true);
printf("FAILED to boot OF");
}
}
printf("Loading Rockbox firmware...");
loadbuffer = (unsigned char*)CONFIG_SDRAM_START;
buffer_size = 0x1000000;
ret = load_firmware(loadbuffer, BOOTFILE, buffer_size);
if(ret <= EFILE_EMPTY)
{
error(EBOOTFILE, ret, true);
}
else
{
lcd_enable(false);
system_prepare_fw_start();
kernel_entry = (void*) loadbuffer;
ret = kernel_entry();
lcd_enable(true);
printf("FAILED!");
}
storage_sleepnow();
while(1);
}
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