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authorDave Chapman <dave@dchapman.com>2005-11-08 00:52:39 +0000
committerDave Chapman <dave@dchapman.com>2005-11-08 00:52:39 +0000
commit38e8fb65d8251edc39f9282ee3bdd83894bbbade (patch)
treeefc7334a0220dd82091c9560481f3da6a5972404 /bootloader/ipod.c
parenta8a8c9db444e8e03cff2c6e3db925df24f8a324e (diff)
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Initial check-in of work-in-progress iPod bootloader. Current targets are iPod Color/Photo and iPod Nano.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7784 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'bootloader/ipod.c')
-rw-r--r--bootloader/ipod.c346
1 files changed, 346 insertions, 0 deletions
diff --git a/bootloader/ipod.c b/bootloader/ipod.c
new file mode 100644
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+++ b/bootloader/ipod.c
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+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2005 by Dave Chapman
+ *
+ * Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
+ * and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
+ *
+ * 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 "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "cpu.h"
+#include "system.h"
+#include "lcd.h"
+#include "kernel.h"
+#include "thread.h"
+#include "ata.h"
+#include "fat.h"
+#include "disk.h"
+#include "font.h"
+#include "adc.h"
+#include "backlight.h"
+#include "button.h"
+#include "panic.h"
+#include "power.h"
+#include "file.h"
+
+#define DRAM_START 0x10000000
+#define IPOD_PP5020_RTC 0x60005010
+
+#define IPOD_HW_REVISION (*((volatile unsigned long*)(0x00002084)))
+
+char version[] = APPSVERSION;
+
+#include "rockbox-16bit.h"
+#include "ipodlinux-16bit.h"
+
+typedef struct _image {
+ unsigned type; /* '' */
+ unsigned id; /* */
+ unsigned pad1; /* 0000 0000 */
+ unsigned devOffset; /* byte offset of start of image code */
+ unsigned len; /* length in bytes of image */
+ void *addr; /* load address */
+ unsigned entryOffset; /* execution start within image */
+ unsigned chksum; /* checksum for image */
+ unsigned vers; /* image version */
+ unsigned loadAddr; /* load address for image */
+} image_t;
+
+extern image_t boot_table[];
+
+int line=0;
+
+static void memmove16(void *dest, const void *src, unsigned count)
+{
+ struct bufstr {
+ unsigned _buf[4];
+ } *d, *s;
+
+ if (src >= dest) {
+ count = (count + 15) >> 4;
+ d = (struct bufstr *) dest;
+ s = (struct bufstr *) src;
+ while (count--)
+ *d++ = *s++;
+ } else {
+ count = (count + 15) >> 4;
+ d = (struct bufstr *)(dest + (count <<4));
+ s = (struct bufstr *)(src + (count <<4));
+ while (count--)
+ *--d = *--s;
+ }
+}
+
+/* get current usec counter */
+int timer_get_current(void)
+{
+ return inl(IPOD_PP5020_RTC);
+}
+
+/* check if number of seconds has past */
+int timer_check(int clock_start, unsigned int usecs)
+{
+ if ((inl(IPOD_PP5020_RTC) - clock_start) >= usecs) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+/* This isn't a sleep, but let's call it that. */
+int usleep(unsigned int usecs)
+{
+ unsigned int start = inl(IPOD_PP5020_RTC);
+
+ while ((inl(IPOD_PP5020_RTC) - start) < usecs) {
+ // empty
+ }
+
+ return 0;
+}
+
+int load_firmware(void)
+{
+ int fd;
+ int rc;
+ int len;
+ unsigned long chksum;
+ char model[5];
+ unsigned long sum;
+ int i;
+ unsigned char *buf = (unsigned char *)DRAM_START;
+ char str[80];
+
+ fd = open("/rockbox.ipod", O_RDONLY);
+ if(fd < 0)
+ return -1;
+
+ len = filesize(fd) - 8;
+
+ snprintf(str, 80, "Length: %x", len);
+ lcd_puts(0, line++, str);
+ lcd_update();
+
+ lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
+
+ rc = read(fd, &chksum, 4);
+ if(rc < 4)
+ return -2;
+
+ snprintf(str, 80, "Checksum: %x", chksum);
+ lcd_puts(0, line++, str);
+ lcd_update();
+
+ rc = read(fd, model, 4);
+ if(rc < 4)
+ return -3;
+
+ model[4] = 0;
+
+ snprintf(str, 80, "Model name: %s", model);
+ lcd_puts(0, line++, str);
+ lcd_update();
+
+ lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
+
+ rc = read(fd, buf, len);
+ if(rc < len)
+ return -4;
+
+ close(fd);
+
+ sum = MODEL_NUMBER;
+
+ for(i = 0;i < len;i++) {
+ sum += buf[i];
+ }
+
+ snprintf(str, 80, "Sum: %x", sum);
+ lcd_puts(0, line++, str);
+ lcd_update();
+
+ if(sum != chksum)
+ return -5;
+
+ return 0;
+}
+
+void* main(void)
+{
+ char buf[256];
+ int imageno=0;
+ int i;
+ int rc;
+ int padding = 0x4400;
+ image_t *tblp = boot_table;
+ void* entry;
+ struct partinfo* pinfo;
+ unsigned short* identify_info;
+
+ /* Turn on the backlight */
+
+#if CONFIG_BACKLIGHT==BL_IPOD4G
+
+ /* brightness full */
+ outl(0x80000000 | (0xff << 16), 0x7000a010);
+
+ /* set port B03 on
+ outl(((0x100 | 1) << 3), 0x6000d824);
+
+#elif CONFIG_BACKLIGHT==BL_IPODNANO
+
+ /* set port B03 on */
+ outl(((0x100 | 1) << 3), 0x6000d824);
+
+ /* set port L07 on */
+ outl(((0x100 | 1) << 7), 0x6000d12c);
+
+#endif
+
+ system_init();
+ kernel_init();
+ lcd_init();
+ font_init();
+
+#if 0
+ /* ADC and button drivers are not yet implemented */
+ adc_init();
+ button_init();
+#endif
+
+ /* Notes: iPod Color/Photo LCD is 220x176, Nano is 176x138 */
+
+ /* Display the 42x47 pixel iPodLinux logo */
+ lcd_bitmap((unsigned char*)ipllogo, 20,6, 42,47);
+
+ /* Display the 100x31 pixel Rockbox logo */
+ lcd_bitmap((unsigned char*)rockboxlogo, 74,16, 100,31);
+
+ line=7;
+
+ lcd_setfont(FONT_SYSFIXED);
+
+ lcd_puts(0, line++, "iPodLinux/Rockbox boot loader");
+ snprintf(buf, sizeof(buf), "Version: 20%s", version);
+ lcd_puts(0, line++, buf);
+ snprintf(buf, sizeof(buf), "IPOD version: 0x%08x", IPOD_HW_REVISION);
+ lcd_puts(0, line++, buf);
+ lcd_update();
+
+ i=ata_init();
+ if (i==0) {
+ identify_info=ata_get_identify();
+ /* Show model */
+ for (i=0; i < 20; i++) {
+ ((unsigned short*)buf)[i]=htobe16(identify_info[i+27]);
+ }
+ buf[40]=0;
+ for (i=39; i && buf[i]==' '; i--) {
+ buf[i]=0;
+ }
+ lcd_puts(0, line++, buf);
+ lcd_update();
+ } else {
+ snprintf(buf, sizeof(buf), "ATA: %d", i);
+ lcd_puts(0, line++, buf);
+ lcd_update();
+ }
+
+ disk_init();
+ rc = disk_mount_all();
+ if (rc<=0)
+ {
+ lcd_puts(0, line++, "No partition found");
+ lcd_update();
+// while(button_get(true) != SYS_USB_CONNECTED) {};
+ }
+
+ pinfo = disk_partinfo(1);
+ snprintf(buf, sizeof(buf), "Partition 1: 0x%02x %ld MB",
+ pinfo->type, pinfo->size / 2048);
+ lcd_puts(0, line++, buf);
+ lcd_update();
+
+#if 0
+ /* The following code will load and run an ipodlinux kernel - we will
+ enable it once the button driver is written and we can detect key
+ presses */
+ int fd=open("/linux.bin",O_RDONLY);
+ if (fd >= 0) {
+ i=filesize(fd);
+ int n=read(fd,(void*)DRAM_START,i);
+ if (n==i) {
+ /* We return the entry point for the loaded kernel */
+ return DRAM_START;
+ } else {
+ /* What do we do now? We may have overwritten the copy of the
+ original firmware with our incomplete copy of the Linux
+ kernel... */
+ }
+ }
+#endif
+
+ /* Pause for 5 seconds so we can see what's happened*/
+ usleep(5000000);
+
+ /* If everything else failed, try the original firmware */
+ lcd_puts(0, line, "Loading original firmware...");
+ lcd_update();
+
+ entry = tblp->addr + tblp->entryOffset;
+ if (imageno || ((int)tblp->addr & 0xffffff) != 0) {
+ memmove16(tblp->addr, tblp->addr + tblp->devOffset - padding,
+ tblp->len);
+ }
+
+ /* Return the start address in loaded image */
+ return entry;
+}
+
+/* These functions are present in the firmware library, but we reimplement
+ them here because the originals do a lot more than we want */
+
+void reset_poweroff_timer(void)
+{
+}
+
+void screen_dump(void)
+{
+}
+
+int dbg_ports(void)
+{
+ return 0;
+}
+
+void mpeg_stop(void)
+{
+}
+
+void usb_acknowledge(void)
+{
+}
+
+void usb_wait_for_disconnect(void)
+{
+}
+
+void sys_poweroff(void)
+{
+}