So far we passed an uninitialized timing member in the ios to the
->set_ios of the host controller drivers.
To allow extension for new modes that need MCI host support beyond
the usual clock rate change, make the member useful:
- populate is with the correct value
- add some type safety by using an enum
- print it in the devinfo output
Signed-off-by: Ahmad Fatoum <a.fat...@pengutronix.de>
---
drivers/mci/mci-core.c | 29 +++++++++++++++++++++++++----
include/mci.h | 25 ++++++++++++++-----------
2 files changed, 39 insertions(+), 15 deletions(-)
diff --git a/drivers/mci/mci-core.c b/drivers/mci/mci-core.c
index dd163c3d1652..e5b5e8a27539 100644
--- a/drivers/mci/mci-core.c
+++ b/drivers/mci/mci-core.c
@@ -668,10 +668,11 @@ retry_scr:
static void mci_set_ios(struct mci *mci)
{
struct mci_host *host = mci->host;
- struct mci_ios ios;
-
- ios.bus_width = host->bus_width;
- ios.clock = host->clock;
+ struct mci_ios ios = {
+ .bus_width = host->bus_width,
+ .clock = host->clock,
+ .timing = host->timing,
+ };
host->set_ios(host, &ios);
}
@@ -996,6 +997,9 @@ static int mci_startup_sd(struct mci *mci)
mci_set_bus_width(mci, MMC_BUS_WIDTH_4);
}
+ if (mci->tran_speed > 25000000)
+ mci->host->timing = MMC_TIMING_SD_HS;
+
mci_set_clock(mci, mci->tran_speed);
return 0;
@@ -1021,6 +1025,8 @@ static int mci_startup_mmc(struct mci *mci)
mci->tran_speed = 52000000;
else
mci->tran_speed = 26000000;
+
+ host->timing = MMC_TIMING_MMC_HS;
}
mci_set_clock(mci, mci->tran_speed);
@@ -1473,6 +1479,20 @@ static unsigned extract_mtd_year(struct mci *mci)
return year;
}
+static const char *mci_timing_tostr(unsigned timing)
+{
+ switch (timing) {
+ case MMC_TIMING_LEGACY:
+ return "legacy";
+ case MMC_TIMING_MMC_HS:
+ return "MMC HS";
+ case MMC_TIMING_SD_HS:
+ return "SD HS";
+ default:
+ return "unknown"; /* shouldn't happen */
+ }
+}
+
static void mci_print_caps(unsigned caps)
{
printf(" capabilities: %s%s%s%s%s\n",
@@ -1509,6 +1529,7 @@ static void mci_info(struct device_d *dev)
bw = 1;
printf(" current buswidth: %d\n", bw);
+ printf(" current timing: %s\n", mci_timing_tostr(host->timing));
mci_print_caps(host->host_caps);
printf("Card information:\n");
diff --git a/include/mci.h b/include/mci.h
index a45d744761a2..57a4629d1293 100644
--- a/include/mci.h
+++ b/include/mci.h
@@ -367,6 +367,18 @@ struct mci_data {
unsigned blocksize; /**< block size in bytes (mostly 512) */
};
+enum mci_timing {
+ MMC_TIMING_LEGACY = 0,
+ MMC_TIMING_MMC_HS = 1,
+ MMC_TIMING_SD_HS = 2,
+ MMC_TIMING_UHS_SDR12 = MMC_TIMING_LEGACY,
+ MMC_TIMING_UHS_SDR25 = MMC_TIMING_SD_HS,
+ MMC_TIMING_UHS_SDR50 = 3,
+ MMC_TIMING_UHS_SDR104 = 4,
+ MMC_TIMING_UHS_DDR50 = 5,
+ MMC_TIMING_MMC_HS200 = 6,
+};
+
struct mci_ios {
unsigned int clock; /* clock rate */
@@ -376,17 +388,7 @@ struct mci_ios {
#define MMC_BUS_WIDTH_4 2
#define MMC_BUS_WIDTH_8 3
- unsigned char timing; /* timing specification used */
-
-#define MMC_TIMING_LEGACY 0
-#define MMC_TIMING_MMC_HS 1
-#define MMC_TIMING_SD_HS 2
-#define MMC_TIMING_UHS_SDR12 MMC_TIMING_LEGACY
-#define MMC_TIMING_UHS_SDR25 MMC_TIMING_SD_HS
-#define MMC_TIMING_UHS_SDR50 3
-#define MMC_TIMING_UHS_SDR104 4
-#define MMC_TIMING_UHS_DDR50 5
-#define MMC_TIMING_MMC_HS200 6
+ enum mci_timing timing; /* timing specification used */
#define MMC_SDR_MODE 0
#define MMC_1_2V_DDR_MODE 1
@@ -408,6 +410,7 @@ struct mci_host {
unsigned f_max; /**< host interface upper limit */
unsigned clock; /**< Current clock used to talk to the card */
unsigned bus_width; /**< used data bus width to the card */
+ enum mci_timing timing; /**< used timing specification to the card */
unsigned max_req_size;
unsigned dsr_val; /**< optional dsr value */
int use_dsr; /**< optional dsr usage flag */
--
2.25.0
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