[U-Boot] [PATCH v1 1/1] fastboot: Add support for flashing zImage
Lukasz Majewski
l.majewski at samsung.com
Wed Mar 4 14:08:00 CET 2015
Hi Rob,
> On Wed, Feb 25, 2015 at 4:56 PM, Dileep Katta
> <dileep.katta at linaro.org> wrote:
> > This patch adds support to flash zImage to the boot partition on
> > eMMC. Usage: fastboot flash zImage <path_to_zImage>
>
> So this replaces the kernel in an existing bootimage. What's wrong
> with "fastboot flash boot", "fastboot flash:raw boot <kernel>" or
> "fastboot boot <kernel>"? It is a bit fragile to be updating your
> kernel without updating the ramdisk. arm64 has no zImage, so this
> command is somewhat arm32 specific.
>
> Fastboot is already plagued with a variety of implementations and
> behaviors. Some unification here would be good and just adding
> whatever various commands have been added to vendor u-boot's is not
> going to help. Adding to the combinations of things to test also
> bothers me.
>
> Rob
>
> >
> > Signed-off-by: Angela Stegmaier <angelabaker at ti.com>
> >
> > Signed-off-by: Dileep Katta <dileep.katta at linaro.org>
> > ---
> > drivers/usb/gadget/f_fastboot.c | 152
> > ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 152
> > insertions(+)
> >
> > diff --git a/drivers/usb/gadget/f_fastboot.c
> > b/drivers/usb/gadget/f_fastboot.c index 310175a..d3d16c0 100644
> > --- a/drivers/usb/gadget/f_fastboot.c
> > +++ b/drivers/usb/gadget/f_fastboot.c
> > @@ -23,6 +23,7 @@
> > #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
> > #include <fb_mmc.h>
> > #endif
> > +#include <android_image.h>
> >
> > #define FASTBOOT_VERSION "0.4"
> >
> > @@ -492,6 +493,152 @@ static void cb_continue(struct usb_ep *ep,
> > struct usb_request *req) }
> >
> > #ifdef CONFIG_FASTBOOT_FLASH
> > +static int fastboot_update_zimage(void);
> > +
> > +static u32 fastboot_get_boot_ptn(struct andr_img_hdr *hdr, char
> > *response,
> > + block_dev_desc_t
> > *dev_desc) +{
> > + u32 hdr_sectors = 0;
> > + u32 sector_size;
> > + int status = 0;
> > + strcpy(response, "OKAY");
> > + disk_partition_t info;
> > +
> > + status = get_partition_info_efi_by_name(dev_desc, "boot",
> > &info);
> > + if (status) {
> > + strcpy(response, "FAILCannot find boot partition");
> > + goto out;
> > + }
> > +
> > + /* Read the boot image header */
> > + sector_size = info.blksz;
> > + hdr_sectors = (sizeof(struct andr_img_hdr)/sector_size) + 1;
> > + status = dev_desc->block_read(dev_desc->dev, info.start,
> > + hdr_sectors, (void *)hdr);
> > +
> > + if (status < 0) {
> > + strcpy(response, "FAILCannot read hdr from boot
> > partition");
> > + goto out;
> > + }
> > + if (android_image_check_header(hdr) != 0) {
> > + printf("bad boot image magic\n");
> > + strcpy(response, "FAILBoot partition not
> > initialized");
> > + goto out;
> > + }
> > +
> > + return hdr_sectors;
> > +
> > +out:
> > + strcpy(response, "INFO");
> > + fastboot_tx_write_str(response);
> > +
> > + return -1;
> > +}
> > +
> > +#define CEIL(a, b) (((a) / (b)) + ((a % b) > 0 ? 1 : 0))
> > +
> > +static int fastboot_update_zimage(void)
> > +{
> > + struct andr_img_hdr *hdr = NULL;
> > + u8 *ramdisk_buffer;
> > + u32 ramdisk_sector_start, ramdisk_sectors;
> > + u32 kernel_sector_start, kernel_sectors;
> > + u32 hdr_sectors = 0;
> > + u32 sectors_per_page = 0;
> > + int ret = 0;
> > + block_dev_desc_t *dev_desc;
> > + disk_partition_t info;
> > + char response[RESPONSE_LEN];
> > + u32 addr = CONFIG_USB_FASTBOOT_BUF_ADDR;
> > +
> > + strcpy(response, "OKAY");
> > + printf("Flashing zImage...%d bytes\n", download_bytes);
> > +
> > + dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
> > + if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
> > + sprintf(response + strlen(response),
> > + "FAILInvalid mmc device");
> > + ret = -1;
> > + goto out;
> > + }
> > +
> > + addr += CEIL(download_bytes, 0x1000) * 0x1000;
> > + hdr = (struct andr_img_hdr *)addr;
> > +
> > + hdr_sectors = fastboot_get_boot_ptn(hdr, response,
> > dev_desc);
> > + if (hdr_sectors <= 0) {
> > + sprintf(response + strlen(response),
> > + "FAILInvalid number of boot sectors %d",
> > hdr_sectors);
> > + ret = -1;
> > + goto out;
> > + }
> > + ret = get_partition_info_efi_by_name(dev_desc, "boot",
> > &info);
> > + if (ret) {
> > + strcpy(response, "FAILCannot find boot partition");
> > + ret = -1;
> > + goto out;
> > + }
> > +
> > + /* Extract ramdisk location and read it into local buffer */
> > + sectors_per_page = hdr->page_size / info.blksz;
> > + ramdisk_sector_start = info.start + sectors_per_page;
> > + ramdisk_sector_start += CEIL(hdr->kernel_size,
> > hdr->page_size)*
> > + sectors_per_page;
> > + ramdisk_sectors = CEIL(hdr->ramdisk_size, hdr->page_size)*
> > + sectors_per_page;
> > +
> > + ramdisk_buffer = (u8 *)hdr;
> > + ramdisk_buffer += (hdr_sectors * info.blksz);
> > + ret = dev_desc->block_read(dev_desc->dev,
> > ramdisk_sector_start,
> > + ramdisk_sectors, ramdisk_buffer);
> > + if (ret < 0) {
> > + sprintf(response, "FAILCannot read ramdisk from
> > 'boot'");
> > + ret = -1;
> > + goto out;
> > + }
> > +
> > + /* Change the boot img hdr */
> > + hdr->kernel_size = download_bytes;
> > + ret = dev_desc->block_write(dev_desc->dev, info.start,
> > + hdr_sectors, (void *)hdr);
> > + if (ret < 0) {
> > + sprintf(response, "FAILCannot writeback boot img
> > hdr");
> > + ret = -1;
> > + goto out;
> > + }
> > +
> > + /* Write the new downloaded kernel*/
> > + kernel_sector_start = info.start + sectors_per_page;
> > + kernel_sectors = CEIL(hdr->kernel_size, hdr->page_size)*
> > + sectors_per_page;
> > + ret = dev_desc->block_write(dev_desc->dev,
> > kernel_sector_start,
> > + kernel_sectors,
> > + (const void
> > *)CONFIG_USB_FASTBOOT_BUF_ADDR);
> > + if (ret < 0) {
> > + sprintf(response, "FAILCannot write new kernel");
> > + ret = -1;
> > + goto out;
> > + }
> > +
> > + /* Write the saved Ramdisk back */
> > + ramdisk_sector_start = info.start + sectors_per_page;
> > + ramdisk_sector_start += CEIL(hdr->kernel_size,
> > hdr->page_size)*
> > + sectors_per_page;
> > + ret = dev_desc->block_write(dev_desc->dev,
> > ramdisk_sector_start,
> > + ramdisk_sectors,
> > ramdisk_buffer);
> > + if (ret < 0) {
> > + sprintf(response, "FAILCannot write back original
> > ramdisk");
> > + ret = -1;
> > + goto out;
> > + }
> > + fastboot_tx_write_str(response);
> > + return 0;
> > +
> > +out:
> > + fastboot_tx_write_str(response);
> > + return ret;
> > +}
> > +
> > static void cb_flash(struct usb_ep *ep, struct usb_request *req)
> > {
> > char *cmd = req->buf;
> > @@ -505,6 +652,11 @@ static void cb_flash(struct usb_ep *ep, struct
> > usb_request *req) }
> >
> > strcpy(response, "FAILno flash device defined");
> > +
> > + if (!strcmp(cmd, "zImage") || !strcmp(cmd, "zimage")) {
> > + fastboot_update_zimage();
> > + return;
> > + }
> > #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
> > fb_mmc_flash_write(cmd, (void
> > *)CONFIG_USB_FASTBOOT_BUF_ADDR, download_bytes, response);
> > --
> > 1.8.3.2
> >
Is this patch dropped or will there be any new revision?
--
Best regards,
Lukasz Majewski
Samsung R&D Institute Poland (SRPOL) | Linux Platform Group
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