From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.phycard.de ([217.6.246.34] helo=root.phytec.de) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fPotq-00011K-RU for barebox@lists.infradead.org; Mon, 04 Jun 2018 12:47:53 +0000 Received: from idefix.phytec.de (idefix.phytec.de [172.16.0.10]) by root.phytec.de (Postfix) with ESMTP id C00F6A0041B for ; Mon, 4 Jun 2018 14:47:35 +0200 (CEST) From: Teresa Remmet Date: Mon, 4 Jun 2018 14:47:31 +0200 Message-Id: <1528116451-40149-1-git-send-email-t.remmet@phytec.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH] commands: mmc_extcsd: Add support to write multibyte registers To: barebox@lists.infradead.org It has been possible to write only the first byte of a multibyte register. Updated the command to write the complete value of a multibyte register at once. Signed-off-by: Teresa Remmet --- commands/mmc_extcsd.c | 44 +++++++++++++++++++++++++++----------------- 1 file changed, 27 insertions(+), 17 deletions(-) diff --git a/commands/mmc_extcsd.c b/commands/mmc_extcsd.c index acd23a466bcb..a5af97fbbaf1 100644 --- a/commands/mmc_extcsd.c +++ b/commands/mmc_extcsd.c @@ -2306,10 +2306,8 @@ static int request_write_operation(void) return 0; } -static void write_field(struct mci *mci, u8 *reg, u16 index, u8 value, - int always_write) +int request_one_time_programmable(u16 index) { - switch (index) { case EXT_CSD_BOOT_CONFIG_PROT: case EXT_CSD_BOOT_WP: @@ -2349,18 +2347,15 @@ static void write_field(struct mci *mci, u8 *reg, u16 index, u8 value, case 52: case EXT_CSD_BARRIER_CTRL: case EXT_CSD_SECURE_REMOVAL_TYPE: - if (!always_write) - if (request_write_operation() == 0) { - printf("Abort write operation!\n"); - goto out; - } - break; + if (request_write_operation() == 0) { + printf("Abort write operation!\n"); + return 1; + } else { + return 0; + } } - mci_switch(mci, index, value); - -out: - return; + return 0; } static int do_mmc_extcsd(int argc, char *argv[]) @@ -2430,11 +2425,26 @@ static int do_mmc_extcsd(int argc, char *argv[]) if (!print_field(dst, index)) { printf("No field with this index found. Abort write operation!\n"); } else { - write_field(mci, dst, index, value, always_write); + struct extcsd_reg *ext; + int i; + int val = 0; + + if (!always_write) { + retval = request_one_time_programmable(index); + if (retval) + goto error_with_mem; + } + + ext = &extcsd[index]; + for (i = 0; i < ext->width; i++) { + val = (value >> (i * 8)) & 0xFF; + + mci_switch(mci, index + i, val); + retval = mci_send_ext_csd(mci, dst); + if (retval != 0) + goto error_with_mem; + } printf("\nValue written!\n\n"); - retval = mci_send_ext_csd(mci, dst); - if (retval != 0) - goto error_with_mem; print_field(dst, index); } else -- 2.7.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox