This patch parses host_caps exported via debugfs.
Signed-off-by: Harish Jenny K N <harish_kandiga@xxxxxxxxxx>
---
mmc.c | 5 +++
mmc_cmds.c | 128 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
mmc_cmds.h | 1 +
3 files changed, 134 insertions(+)
diff --git a/mmc.c b/mmc.c
index 50c9c9e..bd90db0 100644
--- a/mmc.c
+++ b/mmc.c
@@ -53,6 +53,11 @@ static struct Command commands[] = {
/*
* avoid short commands different for the case only
*/
+ { do_read_hostcaps, -1,
+ "hostcaps read", "<path to debugfs host_caps file>\n"
+ "Prints parsed data from host_caps file>.",
+ NULL
+ },
{ do_read_extcsd, -1,
"extcsd read", "<device>\n"
"Print extcsd data from <device>.",
diff --git a/mmc_cmds.c b/mmc_cmds.c
index 038dbd4..e9933e6 100644
--- a/mmc_cmds.c
+++ b/mmc_cmds.c
@@ -54,6 +54,39 @@
#define WPTYPE_PWRON 2
#define WPTYPE_PERM 3
+#define BIT(x) (1ul << x)
+
+#define MMCUTIL_4_BIT_DATA BIT(0) /*Can the host do 4 bit transfers*/
+#define MMCUTIL_MMC_HIGHSPEED BIT(1) /* Can do MMC high-speed timing */
+#define MMCUTIL_SD_HIGHSPEED BIT(2) /* Can do SD high-speed timing */
+#define MMCUTIL_SDIO_IRQ BIT(3) /* Can signal pending SDIO IRQs */
+#define MMCUTIL_SPI BIT(4) /* Talks only SPI protocols */
+#define MMCUTIL_NEEDS_POLL BIT(5) /* Needs polling for card-detection */
+#define MMCUTIL_8_BIT_DATA BIT(6) /* Can the host do 8 bit transfers */
+#define MMCUTIL_AGGRESSIVE_PM BIT(7) /* Suspend (e)MMC/SD at idle */
+#define MMCUTIL_NONREMOVABLE BIT(8) /* Nonremovable e.g. eMMC */
+#define MMCUTIL_WAIT_WHILE_BUSY BIT(9) /* Waits while card is busy */
+#define MMCUTIL_ERASE BIT(10) /* Allow erase/trim commands */
+#define MMCUTIL_3_3V_DDR BIT(11) /* Host supports eMMC DDR 3.3V */
+#define MMCUTIL_1_8V_DDR BIT(12) /* Host supports eMMC DDR 1.8V */
+#define MMCUTIL_1_2V_DDR BIT(13) /* Host supports eMMC DDR 1.2V */
+#define MMCUTIL_POWER_OFF_CARD BIT(14) /* Can power off after boot */
+#define MMCUTIL_BUS_WIDTH_TEST BIT(15) /* CMD14/CMD19 bus width ok */
+#define MMCUTIL_UHS_SDR12 BIT(16) /* Host supports UHS SDR12 mode */
+#define MMCUTIL_UHS_SDR25 BIT(17) /* Host supports UHS SDR25 mode */
+#define MMCUTIL_UHS_SDR50 BIT(18) /* Host supports UHS SDR50 mode */
+#define MMCUTIL_UHS_SDR104 BIT(19) /* Host supports UHS SDR104 mode */
+#define MMCUTIL_UHS_DDR50 BIT(20) /* Host supports UHS DDR50 mode */
+/* BIT(21) is free for reuse */
+#define MMCUTIL_DRIVER_TYPE_A BIT(23) /* Host supports Driver Type A */
+#define MMCUTIL_DRIVER_TYPE_C BIT(24) /* Host supports Driver Type C */
+#define MMCUTIL_DRIVER_TYPE_D BIT(25) /* Host supports Driver Type D */
+#define MMCUTIL_DONE_COMPLETE BIT(27) /* RW reqs can be completed */
+/* within mmc_request_done() */
+#define MMCUTIL_CD_WAKE BIT(28) /* Enable card detect wake */
+#define MMCUTIL_CMD_DURING_TFR BIT(29) /* Commands during data transfer*/
+#define MMCUTIL_CMD23 BIT(30) /* CMD23 supported. */
+#define MMCUTIL_HW_RESET BIT(31) /* Hardware reset */
int read_extcsd(int fd, __u8 *ext_csd)
{
@@ -1311,6 +1344,101 @@ int do_write_reliability_set(int nargs, char **argv)
return 0;
}
+int do_read_hostcaps(int nargs, char **argv)
+{
+ __u32 caps = 0;
+ char caps_str[11];
+ int fd, ret;
+ char *filepath;
+
+ if (nargs != 2) {
+ fprintf(stderr,
+ "Usage: mmc hostcaps read </path/to/host_caps>\n");
+ exit(1);
+ }
+
+ filepath = argv[1];
+
+ fd = open(filepath, O_RDWR);
+ if (fd < 0) {
+ perror("open");
+ exit(1);
+ }
+
+ memset(caps_str, 0, sizeof(caps_str));
+ ret = read(fd, caps_str, sizeof(caps_str));
+ if (ret < 0) {
+ fprintf(stderr, "Could not read host capabilities from %s\n",
+ filepath);
+ exit(1);
+ }
+ caps = strtol(&caps_str[2], NULL, 16);
+
+ printf("=============================================\n");
+ printf(" Host capabilities of %s are\n", filepath);
+ printf("=============================================\n");
+ printf("Can the host do 4 bit transfers :%s\n",
+ ((caps & MMCUTIL_4_BIT_DATA) ? "ENABLED" : "DISABLED"));
+ printf("Can do MMC high-speed timing :%s\n",
+ ((caps & MMCUTIL_MMC_HIGHSPEED) ? "ENABLED" : "DISABLED"));
+ printf("Can do SD high-speed timing :%s\n",
+ ((caps & MMCUTIL_SD_HIGHSPEED) ? "ENABLED" : "DISABLED"));
+ printf("Can signal pending SDIO IRQs :%s\n",
+ ((caps & MMCUTIL_SDIO_IRQ) ? "ENABLED" : "DISABLED"));
+ printf("Talks only SPI protocols :%s\n",
+ ((caps & MMCUTIL_SPI) ? "ENABLED" : "DISABLED"));
+ printf("Needs polling for card-detection :%s\n",
+ ((caps & MMCUTIL_NEEDS_POLL) ? "ENABLED" : "DISABLED"));
+ printf("Can the host do 8 bit transfers :%s\n",
+ ((caps & MMCUTIL_8_BIT_DATA) ? "ENABLED" : "DISABLED"));
+ printf("Suspend (e)MMC/SD at idle :%s\n",
+ ((caps & MMCUTIL_AGGRESSIVE_PM) ? "ENABLED" : "DISABLED"));
+ printf("Nonremovable e.g. eMMC :%s\n",
+ ((caps & MMCUTIL_NONREMOVABLE) ? "ENABLED" : "DISABLED"));
+ printf("Waits while card is busy :%s\n",
+ ((caps & MMCUTIL_WAIT_WHILE_BUSY) ? "ENABLED" : "DISABLED"));
+ printf("Allow erase/trim commands :%s\n",
+ ((caps & MMCUTIL_ERASE) ? "ENABLED" : "DISABLED"));
+ printf("Can support DDR mode at 3.3V :%s\n",
+ ((caps & MMCUTIL_3_3V_DDR) ? "ENABLED" : "DISABLED"));
+ printf("Can support DDR mode at 1.8V :%s\n",
+ ((caps & MMCUTIL_1_8V_DDR) ? "ENABLED" : "DISABLED"));
+ printf("Can support DDR mode at 1.2V :%s\n",
+ ((caps & MMCUTIL_1_2V_DDR) ? "ENABLED" : "DISABLED"));
+ printf("Can power off after boot :%s\n",
+ ((caps & MMCUTIL_POWER_OFF_CARD) ? "ENABLED" : "DISABLED"));
+ printf("CMD14/CMD19 bus width ok :%s\n",
+ ((caps & MMCUTIL_BUS_WIDTH_TEST) ? "ENABLED" : "DISABLED"));
+ printf("Host supports UHS SDR12 mode :%s\n",
+ ((caps & MMCUTIL_UHS_SDR12) ? "ENABLED" : "DISABLED"));
+ printf("Host supports UHS SDR25 mode :%s\n",
+ ((caps & MMCUTIL_UHS_SDR25) ? "ENABLED" : "DISABLED"));
+ printf("Host supports UHS SDR50 mode :%s\n",
+ ((caps & MMCUTIL_UHS_SDR50) ? "ENABLED" : "DISABLED"));
+ printf("Host supports UHS SDR104 mode :%s\n",
+ ((caps & MMCUTIL_UHS_SDR104) ? "ENABLED" : "DISABLED"));
+ printf("Host supports UHS DDR50 mode :%s\n",
+ ((caps & MMCUTIL_UHS_DDR50) ? "ENABLED" : "DISABLED"));
+ printf("Host supports Driver Type A :%s\n",
+ ((caps & MMCUTIL_DRIVER_TYPE_A) ? "ENABLED" : "DISABLED"));
+ printf("Host supports Driver Type C :%s\n",
+ ((caps & MMCUTIL_DRIVER_TYPE_C) ? "ENABLED" : "DISABLED"));
+ printf("Host supports Driver Type D :%s\n",
+ ((caps & MMCUTIL_DRIVER_TYPE_D) ? "ENABLED" : "DISABLED"));
+ printf("RW reqs can be completed within mmc_request_done() :%s\n",
+ ((caps & MMCUTIL_DONE_COMPLETE) ? "ENABLED" : "DISABLED"));
+ printf("Enable card detect wake :%s\n",
+ ((caps & MMCUTIL_CD_WAKE) ? "ENABLED" : "DISABLED"));
+ printf("Commands during data transfer :%s\n",
+ ((caps & MMCUTIL_CMD_DURING_TFR) ? "ENABLED" : "DISABLED"));
+ printf("CMD23 supported. :%s\n",
+ ((caps & MMCUTIL_CMD23) ? "ENABLED" : "DISABLED"));
+ printf("Hardware reset :%s\n",
+ ((caps & MMCUTIL_HW_RESET) ? "ENABLED" : "DISABLED"));
+ printf("=============================================\n");
+ return 0;
+}
+
int do_read_extcsd(int nargs, char **argv)
{
__u8 ext_csd[512], ext_csd_rev, reg;
diff --git a/mmc_cmds.h b/mmc_cmds.h
index 9d3246c..8fe5852 100644
--- a/mmc_cmds.h
+++ b/mmc_cmds.h
@@ -18,6 +18,7 @@
*/
/* mmc_cmds.c */
+int do_read_hostcaps(int nargs, char **argv);
int do_read_extcsd(int nargs, char **argv);
int do_write_extcsd(int nargs, char **argv);
int do_writeprotect_boot_get(int nargs, char **argv);
--
1.9.1
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