diff options
author | Marek Vasut <marek.vasut@gmail.com> | 2019-11-23 13:36:17 +0100 |
---|---|---|
committer | Peng Fan <peng.fan@nxp.com> | 2019-11-27 16:56:46 +0800 |
commit | 0196a58a792f37d2c80ba6a50f52da15950937c9 (patch) | |
tree | eb48054b1309614e3d1b6f484b56dcdf2a9fdf91 /drivers/mmc/renesas-sdhi.c | |
parent | 1eaffca076543addf86fc91778a0c9b9c7fcf3df (diff) |
mmc: tmio: sdhi: Track current tap number in private data
Retain the tap number from last calibration in private data. This
will be later used for SCC error checking after each command.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'drivers/mmc/renesas-sdhi.c')
-rw-r--r-- | drivers/mmc/renesas-sdhi.c | 31 |
1 files changed, 16 insertions, 15 deletions
diff --git a/drivers/mmc/renesas-sdhi.c b/drivers/mmc/renesas-sdhi.c index 0cb65b480d..acc44e5b90 100644 --- a/drivers/mmc/renesas-sdhi.c +++ b/drivers/mmc/renesas-sdhi.c @@ -289,8 +289,7 @@ static unsigned int renesas_sdhi_compare_scc_data(struct tmio_sd_priv *priv) } static int renesas_sdhi_select_tuning(struct tmio_sd_priv *priv, - unsigned int tap_num, unsigned int taps, - unsigned int smpcmp) + unsigned int taps, unsigned int smpcmp) { unsigned long tap_cnt; /* counter of tuning success */ unsigned long tap_start;/* start position of tuning success */ @@ -307,14 +306,14 @@ static int renesas_sdhi_select_tuning(struct tmio_sd_priv *priv, tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_RVSREQ); /* Merge the results */ - for (i = 0; i < tap_num * 2; i++) { + for (i = 0; i < priv->tap_num * 2; i++) { if (!(taps & BIT(i))) { - taps &= ~BIT(i % tap_num); - taps &= ~BIT((i % tap_num) + tap_num); + taps &= ~BIT(i % priv->tap_num); + taps &= ~BIT((i % priv->tap_num) + priv->tap_num); } if (!(smpcmp & BIT(i))) { - smpcmp &= ~BIT(i % tap_num); - smpcmp &= ~BIT((i % tap_num) + tap_num); + smpcmp &= ~BIT(i % priv->tap_num); + smpcmp &= ~BIT((i % priv->tap_num) + priv->tap_num); } } @@ -327,7 +326,7 @@ static int renesas_sdhi_select_tuning(struct tmio_sd_priv *priv, ntap = 0; tap_start = 0; tap_end = 0; - for (i = 0; i < tap_num * 2; i++) { + for (i = 0; i < priv->tap_num * 2; i++) { if (taps & BIT(i)) ntap++; else { @@ -350,12 +349,12 @@ static int renesas_sdhi_select_tuning(struct tmio_sd_priv *priv, * If all of the TAP is OK, the sampling clock position is selected by * identifying the change point of data. */ - if (tap_cnt == tap_num * 2) { + if (tap_cnt == priv->tap_num * 2) { match_cnt = 0; ntap = 0; tap_start = 0; tap_end = 0; - for (i = 0; i < tap_num * 2; i++) { + for (i = 0; i < priv->tap_num * 2; i++) { if (smpcmp & BIT(i)) ntap++; else { @@ -378,7 +377,7 @@ static int renesas_sdhi_select_tuning(struct tmio_sd_priv *priv, select = true; if (select) - priv->tap_set = ((tap_start + tap_end) / 2) % tap_num; + priv->tap_set = ((tap_start + tap_end) / 2) % priv->tap_num; else return -EIO; @@ -419,15 +418,17 @@ int renesas_sdhi_execute_tuning(struct udevice *dev, uint opcode) /* Tuning is not supported */ goto out; - if (tap_num * 2 >= sizeof(taps) * 8) { + priv->tap_num = tap_num; + + if (priv->tap_num * 2 >= sizeof(taps) * 8) { dev_err(dev, "Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n"); goto out; } /* Issue CMD19 twice for each tap */ - for (i = 0; i < 2 * tap_num; i++) { - renesas_sdhi_prepare_tuning(priv, i % tap_num); + for (i = 0; i < 2 * priv->tap_num; i++) { + renesas_sdhi_prepare_tuning(priv, i % priv->tap_num); /* Force PIO for the tuning */ caps = priv->caps; @@ -447,7 +448,7 @@ int renesas_sdhi_execute_tuning(struct udevice *dev, uint opcode) mdelay(1); } - ret = renesas_sdhi_select_tuning(priv, tap_num, taps, smpcmp); + ret = renesas_sdhi_select_tuning(priv, taps, smpcmp); out: if (ret < 0) { |