From: Raffaele Recalcati raffaele.recalcati@bticino.it
Defining CONFIG_MMC_TRACE in the include board file it is possible to activate a tracing support. This code helps in case of eMMC hw failure or to investigate possible eMMC initialization issues.
Signed-off-by: Raffaele Recalcati raffaele.recalcati@bticino.it --- drivers/mmc/mmc.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 71 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index acd7479..0dfc83a 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -45,7 +45,60 @@ int board_mmc_getcd(u8 *cd, struct mmc *mmc)__attribute__((weak,
int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) { +#ifdef CONFIG_MMC_TRACE + int ret; + int i; + u8 *ptr; + + printf("CMD_SEND:%d\n", cmd->cmdidx); + printf("\t\tARG\t\t\t 0x%08X\n", cmd->cmdarg); + printf("\t\tFLAG\t\t\t %d\n", cmd->flags); + ret = mmc->send_cmd(mmc, cmd, data); + switch (cmd->resp_type) { + case MMC_RSP_NONE: + printf("\t\tMMC_RSP_NONE\n"); + break; + case MMC_RSP_R1: + printf("\t\tMMC_RSP_R1,5,6,7 \t 0x%08X \n", + cmd->response[0]); + break; + case MMC_RSP_R1b: + printf("\t\tMMC_RSP_R1b\t\t 0x%08X \n", + cmd->response[0]); + break; + case MMC_RSP_R2: + printf("\t\tMMC_RSP_R2\t\t 0x%08X \n", + cmd->response[0]); + printf("\t\t \t\t 0x%08X \n", + cmd->response[1]); + printf("\t\t \t\t 0x%08X \n", + cmd->response[2]); + printf("\t\t \t\t 0x%08X \n", + cmd->response[3]); + printf("\n"); + printf("\t\t\t\t\tDUMPING DATA\n"); + for (i = 0; i < 4; i++) { + int j; + printf("\t\t\t\t\t%03d - ", i*4); + ptr = &cmd->response[i]; + ptr += 3; + for (j = 0; j < 4; j++) + printf("%02X ", *ptr--); + printf("\n"); + } + break; + case MMC_RSP_R3: + printf("\t\tMMC_RSP_R3,4\t\t 0x%08X \n", + cmd->response[0]); + break; + default: + printf("\t\tERROR MMC rsp not supported\n"); + break; + } + return ret; +#else return mmc->send_cmd(mmc, cmd, data); +#endif }
int mmc_send_status(struct mmc *mmc) @@ -71,6 +124,10 @@ int mmc_send_status(struct mmc *mmc) } } while (!(cmd.response[0] & MMC_STATUS_RDY_FOR_DATA) && timeout--);
+#ifdef CONFIG_MMC_TRACE + status = (cmd.response[0] & MMC_STATUS_CURR_STATE) >> 9; + printf("CURR STATE:%d\n", status); +#endif return 0; }
@@ -418,6 +475,20 @@ int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
err = mmc_send_cmd(mmc, &cmd, &data);
+#ifdef CONFIG_MMC_TRACE + { + int i; + printf("\n"); + printf("MMC_SEND_EXT_CSD: DUMPING DATA\n"); + for (i = 0; i < 32; i++) { + int j; + printf("%03d - ", i*16); + for (j = 0; j < 16; j++) + printf("%02X ", data.dest[j+i*16]); + printf("\n"); + } + } +#endif return err; }