be322768f0
This adds a omap_set_bootmmc_devname function which can be used to specify the MMC boot device. In an xload configuration this is then used to load the next stage. In a regular build this is used to mount /boot. Also a device_detect_by_name is added to allow to disable probing for sd/mmc cards during startup. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
255 lines
4.6 KiB
C
255 lines
4.6 KiB
C
#include <common.h>
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#include <bootsource.h>
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#include <partition.h>
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#include <nand.h>
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#include <init.h>
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#include <driver.h>
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#include <linux/mtd/mtd.h>
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#include <fs.h>
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#include <fcntl.h>
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#include <sizes.h>
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#include <malloc.h>
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#include <filetype.h>
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#include <mach/generic.h>
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struct omap_barebox_part *barebox_part;
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static struct omap_barebox_part default_part = {
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.nand_offset = SZ_128K,
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.nand_size = SZ_1M,
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.nor_offset = SZ_128K,
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.nor_size = SZ_1M,
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};
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static void *read_image_head(const char *name)
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{
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void *header = xmalloc(ARM_HEAD_SIZE);
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struct cdev *cdev;
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int ret;
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cdev = cdev_open(name, O_RDONLY);
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if (!cdev) {
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printf("failed to open partition\n");
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return NULL;
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}
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ret = cdev_read(cdev, header, ARM_HEAD_SIZE, 0, 0);
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cdev_close(cdev);
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if (ret != ARM_HEAD_SIZE) {
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printf("failed to read from partition\n");
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return NULL;
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}
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return header;
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}
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static unsigned int get_image_size(void *head)
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{
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unsigned int ret = 0;
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unsigned int *psize = head + ARM_HEAD_SIZE_OFFSET;
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if (is_barebox_arm_head(head))
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ret = *psize;
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debug("Detected barebox image size %u\n", ret);
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return ret;
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}
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static void *omap_xload_boot_nand(int offset, int part_size)
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{
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int ret;
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int size;
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void *to, *header;
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struct cdev *cdev;
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devfs_add_partition("nand0", offset, part_size,
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DEVFS_PARTITION_FIXED, "x");
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dev_add_bb_dev("x", "bbx");
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header = read_image_head("bbx");
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if (header == NULL)
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return NULL;
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size = get_image_size(header);
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if (!size) {
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printf("failed to get image size\n");
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return NULL;
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}
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to = xmalloc(size);
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cdev = cdev_open("bbx", O_RDONLY);
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if (!cdev) {
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printf("failed to open nand\n");
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return NULL;
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}
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ret = cdev_read(cdev, to, size, 0, 0);
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if (ret != size) {
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printf("failed to read from nand\n");
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return NULL;
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}
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return to;
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}
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static void *omap_xload_boot_mmc(void)
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{
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int ret;
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void *buf;
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int len;
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const char *diskdev;
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char *partname;
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diskdev = omap_get_bootmmc_devname();
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if (!diskdev)
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diskdev = "disk0";
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device_detect_by_name(diskdev);
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partname = asprintf("%s.0", diskdev);
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ret = mount(partname, "fat", "/");
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free(partname);
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if (ret) {
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printf("Unable to mount %s (%d)\n", partname, ret);
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return NULL;
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}
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buf = read_file("/barebox.bin", &len);
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if (!buf) {
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printf("could not read barebox.bin from sd card\n");
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return NULL;
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}
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return buf;
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}
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static void *omap_xload_boot_spi(int offset, int part_size)
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{
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int ret;
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int size;
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void *to, *header;
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struct cdev *cdev;
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devfs_add_partition("m25p0", offset, part_size,
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DEVFS_PARTITION_FIXED, "x");
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header = read_image_head("x");
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if (header == NULL)
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return NULL;
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size = get_image_size(header);
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if (!size) {
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printf("failed to get image size\n");
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return NULL;
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}
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to = xmalloc(size);
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cdev = cdev_open("x", O_RDONLY);
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if (!cdev) {
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printf("failed to open spi flash\n");
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return NULL;
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}
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ret = cdev_read(cdev, to, size, 0, 0);
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if (ret != size) {
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printf("failed to read from spi flash\n");
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return NULL;
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}
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return to;
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}
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static void *omap4_xload_boot_usb(void){
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int ret;
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void *buf;
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int len;
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ret = mount("omap4_usbboot", "omap4_usbbootfs", "/");
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if (ret) {
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printf("Unable to mount omap4_usbbootfs (%d)\n", ret);
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return NULL;
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}
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buf = read_file("/barebox.bin", &len);
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if (!buf)
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printf("could not read barebox.bin from omap4_usbbootfs\n");
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return buf;
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}
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/*
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* Replaces the default shell in xload configuration
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*/
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static __noreturn int omap_xload(void)
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{
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int (*func)(void *) = NULL;
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uint32_t *arg;
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if (!barebox_part)
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barebox_part = &default_part;
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switch (bootsource_get())
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{
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case BOOTSOURCE_MMC:
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printf("booting from MMC\n");
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func = omap_xload_boot_mmc();
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break;
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case BOOTSOURCE_USB:
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if (IS_ENABLED(CONFIG_FS_OMAP4_USBBOOT)) {
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printf("booting from USB\n");
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func = omap4_xload_boot_usb();
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break;
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} else {
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printf("booting from USB not enabled\n");
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}
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case BOOTSOURCE_NAND:
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printf("booting from NAND\n");
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func = omap_xload_boot_nand(barebox_part->nand_offset,
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barebox_part->nand_size);
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break;
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case BOOTSOURCE_SPI:
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printf("booting from SPI\n");
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func = omap_xload_boot_spi(barebox_part->nor_offset,
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barebox_part->nor_size);
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break;
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default:
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printf("unknown boot source. Fall back to nand\n");
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func = omap_xload_boot_nand(barebox_part->nand_offset,
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barebox_part->nand_size);
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break;
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}
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if (!func) {
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printf("booting failed\n");
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while (1);
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}
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arg = (uint32_t *)&omap_bootinfo;
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shutdown_barebox();
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func(arg);
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while (1);
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}
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int omap_set_barebox_part(struct omap_barebox_part *part)
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{
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barebox_part = part;
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return 0;
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}
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static int omap_set_xload(void)
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{
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barebox_main = omap_xload;
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return 0;
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}
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late_initcall(omap_set_xload);
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