From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de> To: barebox@lists.infradead.org Cc: rcz@pengutronix.de, Ahmad Fatoum <a.fatoum@pengutronix.de> Subject: [PATCH v2 1/3] imx8mp-evk: Add support for booting via USB Date: Fri, 13 Aug 2021 17:22:43 +0200 Message-ID: <20210813152245.15841-2-u.kleine-koenig@pengutronix.de> (raw) In-Reply-To: <20210813152245.15841-1-u.kleine-koenig@pengutronix.de> --- arch/arm/boards/nxp-imx8mp-evk/lowlevel.c | 27 +++++++++++++++++++++++ arch/arm/mach-imx/boot.c | 4 +++- include/asm-generic/sections.h | 1 + 3 files changed, 31 insertions(+), 1 deletion(-) diff --git a/arch/arm/boards/nxp-imx8mp-evk/lowlevel.c b/arch/arm/boards/nxp-imx8mp-evk/lowlevel.c index 3298ded5866d..1fb7899198d6 100644 --- a/arch/arm/boards/nxp-imx8mp-evk/lowlevel.c +++ b/arch/arm/boards/nxp-imx8mp-evk/lowlevel.c @@ -99,6 +99,30 @@ static int power_init_board(void) return 0; } +/* read piggydata via a bootrom callback and place it behind our copy in SDRAM */ +static int imx8m_bootrom_load_image(void) +{ + int (*download_image)(u8 *dest, u32 offset, u32 size, u32 xor) = *(void **)0x988; + size_t count = __piggydata_end - __piggydata_start; + char *p = (char *)MX8M_ATF_BL33_BASE_ADDR + (__piggydata_start - __image_start); + + while (count) { + size_t chunksize = min(count, (size_t)1024); + int ret; + + ret = download_image(p, 0, chunksize, (uintptr_t)p ^ chunksize); + if (ret != 0xf0) { + pr_err("Failed to load piggy data (ret = %x)\n", ret); + return -EIO; + } + + p += chunksize; + count -= chunksize; + } + + return 0; +} + extern struct dram_timing_info imx8mp_evk_dram_timing; static void start_atf(void) @@ -125,6 +149,9 @@ static void start_atf(void) case BOOTSOURCE_MMC: imx8mp_esdhc_load_image(instance, false); break; + case BOOTSOURCE_SERIAL: + imx8m_bootrom_load_image(); + break; default: printf("Unhandled bootsource BOOTSOURCE_%d\n", src); hang(); diff --git a/arch/arm/mach-imx/boot.c b/arch/arm/mach-imx/boot.c index 2b66bbf71eb1..7c1d49291045 100644 --- a/arch/arm/mach-imx/boot.c +++ b/arch/arm/mach-imx/boot.c @@ -495,10 +495,12 @@ static void __imx7_get_boot_source(enum bootsource *src, int *instance, case 5: *src = BOOTSOURCE_NOR; break; - case 15: + case 14: /* observed on i.MX8MP for USB "serial" booting */ + case 15: /* observed on i.MX8MM for USB "serial" booting */ *src = BOOTSOURCE_SERIAL; break; default: + *src = BOOTSOURCE_UNKNOWN; break; } } diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h index 870bff21f668..597c4951ea5e 100644 --- a/include/asm-generic/sections.h +++ b/include/asm-generic/sections.h @@ -9,6 +9,7 @@ extern char _end[]; extern char __image_start[]; extern char __image_end[]; extern char __piggydata_start[]; +extern char __piggydata_end[]; extern void *_barebox_image_size; extern void *_barebox_bare_init_size; extern void *_barebox_pbl_size; -- 2.30.2 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox
next prev parent reply other threads:[~2021-08-13 15:34 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-08-13 15:22 [PATCH v2 0/3] Support usb booting on i.MX8MP Uwe Kleine-König 2021-08-13 15:22 ` Uwe Kleine-König [this message] 2021-08-13 19:26 ` [PATCH v2 1/3] imx8mp-evk: Add support for booting via USB Ahmad Fatoum 2021-08-13 20:20 ` Lucas Stach 2021-08-13 20:48 ` Ahmad Fatoum 2021-10-26 16:30 ` Ahmad Fatoum 2021-08-13 15:22 ` [PATCH v2 2/3] imx-usb-loader: Drop nearly unused struct usb_id Uwe Kleine-König 2021-10-27 6:05 ` Ahmad Fatoum 2021-08-13 15:22 ` [PATCH v2 3/3] imx-usb-loader: Add support for i.MX8MP Uwe Kleine-König 2021-10-27 6:06 ` Ahmad Fatoum 2021-08-13 20:32 ` [PATCH v2 0/3] Support usb booting on i.MX8MP Lucas Stach 2021-10-13 19:33 ` Ahmad Fatoum
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