projects / ms2-kexec / blame
| Commit | Line | Data |
|---|---|---|
| 981f7356 MG |
1 | /* |
| 2 | * Set software booting from USB | |
| 3 | * | |
| 4 | * From: | |
| 5 | * http://www.droid-developers.org/wiki/How_to_load_mbmloader_from_SD_card | |
| 6 | */ | |
| 7 | ||
| 8 | #include <linux/module.h> | |
| 9 | #include <linux/gpio_mapping.h> | |
| 10 | #include <linux/gpio.h> | |
| 11 | #include <linux/platform_device.h> | |
| 12 | #include <linux/serial_reg.h> | |
| 13 | #include <linux/clk.h> | |
| 14 | ||
| 15 | #include <plat/board.h> | |
| 16 | #include <plat/control.h> | |
| 17 | #include <asm/mach/serial_omap.h> | |
| 18 | ||
| 19 | #include "prm.h" | |
| 20 | #include "prm-regbits-34xx.h" | |
| 21 | ||
| 22 | #define SCRATCH_MEM 0x48002910 | |
| 23 | #define GLOBAL_REG_PRM 0x48307200 | |
| 24 | ||
| 25 | static int __init boot_usb_init(void) | |
| 26 | { | |
| 27 | void *scratch_mem, *global_reg_prm; | |
| 28 | ||
| 29 | scratch_mem = ioremap(SCRATCH_MEM, 240); | |
| 30 | global_reg_prm = ioremap(GLOBAL_REG_PRM, 256); | |
| 31 | ||
| 32 | // Disable IRQ | |
| 33 | local_irq_disable(); | |
| 34 | local_fiq_disable(); | |
| 35 | ||
| 36 | // Store address of booting configuration structure | |
| 37 | __raw_writel(SCRATCH_MEM+0xA0, scratch_mem + 0); | |
| 38 | ||
| 39 | // Header of booting config | |
| 40 | __raw_writel(0xCF00AA01, scratch_mem + 0xA0); | |
| 41 | // Size of booting config | |
| 42 | __raw_writel(0xC, scratch_mem + 0xA4); | |
| 43 | // First booting device is 0x11 (USB), Flags 0x00 | |
| 44 | __raw_writel(0x00110000, scratch_mem + 0xA8); | |
| 45 | // Second is 0x11, third is 0x11 | |
| 46 | __raw_writel(0x00110011, scratch_mem + 0xAC); | |
| 47 | // Fourth is 0x11 | |
| 48 | __raw_writel(0x00000011, scratch_mem + 0xB0); | |
| 49 | ||
| 50 | // software reset | |
| 51 | __raw_writel(0x04, global_reg_prm + 0x50); | |
| 52 | return 0; | |
| 53 | } | |
| 54 | ||
| 55 | static void __exit boot_usb_exit(void) | |
| 56 | { | |
| 57 | return; | |
| 58 | } | |
| 59 | ||
| 60 | ||
| 61 | module_init(boot_usb_init); | |
| 62 | module_exit(boot_usb_exit); | |
| 63 | ||
| 64 | MODULE_LICENSE("GPL"); | |
| 65 | MODULE_AUTHOR("Michael Gernoth <michael@gernoth.net>"); |