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mmc: tmio: factor out TAP usage

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TAPs are Renesas SDHI specific. Now that we moved all handling to the
SDHI core, we can also move the definitions from the TMIO struct to the
SDHI one.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20200129203709.30493-6-wsa+renesas@sang-engineering.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wolfram Sang 2020-01-29 21:37:08 +01:00 committed by Ulf Hansson
parent a86bf70b70
commit b2dd9a1325
3 changed files with 24 additions and 24 deletions
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5
drivers/mmc/host/renesas_sdhi.h
View File

@ -58,6 +58,11 @@ struct renesas_sdhi {
u32 scc_tappos;
u32 scc_tappos_hs400;
bool doing_tune;
/* Tuning values: 1 for success, 0 for failure */
DECLARE_BITMAP(taps, BITS_PER_BYTE * sizeof(long));
unsigned int tap_num;
unsigned long tap_set;
};
#define host_to_priv(host) \

38
drivers/mmc/host/renesas_sdhi_core.c
View File

@ -354,7 +354,7 @@ static void renesas_sdhi_hs400_complete(struct tmio_mmc_host *host)
if (priv->quirks && priv->quirks->hs400_4taps)
sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET,
host->tap_set / 2);
priv->tap_set / 2);
sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL,
SH_MOBILE_SDHI_SCC_CKSEL_DTSEL |
@ -438,11 +438,11 @@ static int renesas_sdhi_select_tuning(struct tmio_mmc_host *host)
* result requiring the tap to be good in both runs before
* considering it for tuning selection.
*/
for (i = 0; i < host->tap_num * 2; i++) {
int offset = host->tap_num * (i < host->tap_num ? 1 : -1);
for (i = 0; i < priv->tap_num * 2; i++) {
int offset = priv->tap_num * (i < priv->tap_num ? 1 : -1);
if (!test_bit(i, host->taps))
clear_bit(i + offset, host->taps);
if (!test_bit(i, priv->taps))
clear_bit(i + offset, priv->taps);
}
/*
@ -454,8 +454,8 @@ static int renesas_sdhi_select_tuning(struct tmio_mmc_host *host)
ntap = 0;
tap_start = 0;
tap_end = 0;
for (i = 0; i < host->tap_num * 2; i++) {
if (test_bit(i, host->taps)) {
for (i = 0; i < priv->tap_num * 2; i++) {
if (test_bit(i, priv->taps)) {
ntap++;
} else {
if (ntap > tap_cnt) {
@ -474,12 +474,12 @@ static int renesas_sdhi_select_tuning(struct tmio_mmc_host *host)
}
if (tap_cnt >= SH_MOBILE_SDHI_MAX_TAP)
host->tap_set = (tap_start + tap_end) / 2 % host->tap_num;
priv->tap_set = (tap_start + tap_end) / 2 % priv->tap_num;
else
return -EIO;
/* Set SCC */
sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, host->tap_set);
sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, priv->tap_set);
/* Enable auto re-tuning */
sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
@ -494,27 +494,27 @@ static int renesas_sdhi_execute_tuning(struct tmio_mmc_host *host, u32 opcode)
struct renesas_sdhi *priv = host_to_priv(host);
int i, ret;
host->tap_num = renesas_sdhi_init_tuning(host);
if (!host->tap_num)
priv->tap_num = renesas_sdhi_init_tuning(host);
if (!priv->tap_num)
return 0; /* Tuning is not supported */
if (host->tap_num * 2 >= sizeof(host->taps) * BITS_PER_BYTE) {
if (priv->tap_num * 2 >= sizeof(priv->taps) * BITS_PER_BYTE) {
dev_err(&host->pdev->dev,
"Too many taps, please update 'taps' in tmio_mmc_host!\n");
return -EINVAL;
}
priv->doing_tune = true;
bitmap_zero(host->taps, host->tap_num * 2);
bitmap_zero(priv->taps, priv->tap_num * 2);
/* Issue CMD19 twice for each tap */
for (i = 0; i < 2 * host->tap_num; i++) {
for (i = 0; i < 2 * priv->tap_num; i++) {
/* Set sampling clock position */
sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, i % host->tap_num);
sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, i % priv->tap_num);
ret = mmc_send_tuning(host->mmc, opcode, NULL);
if (ret == 0)
set_bit(i, host->taps);
set_bit(i, priv->taps);
}
return renesas_sdhi_select_tuning(host);
@ -523,7 +523,7 @@ static int renesas_sdhi_execute_tuning(struct tmio_mmc_host *host, u32 opcode)
static bool renesas_sdhi_manual_correction(struct tmio_mmc_host *host, bool use_4tap)
{
struct renesas_sdhi *priv = host_to_priv(host);
unsigned long new_tap = host->tap_set;
unsigned long new_tap = priv->tap_set;
u32 val;
val = sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ);
@ -560,9 +560,9 @@ static bool renesas_sdhi_manual_correction(struct tmio_mmc_host *host, bool use_
return false;
}
host->tap_set = (new_tap % host->tap_num);
priv->tap_set = (new_tap % priv->tap_num);
sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET,
host->tap_set / (use_4tap ? 2 : 1));
priv->tap_set / (use_4tap ? 2 : 1));
return false;
}

5
drivers/mmc/host/tmio_mmc.h
View File

@ -184,11 +184,6 @@ struct tmio_mmc_host {
*/
int (*execute_tuning)(struct tmio_mmc_host *host, u32 opcode);
/* Tuning values: 1 for success, 0 for failure */
DECLARE_BITMAP(taps, BITS_PER_BYTE * sizeof(long));
unsigned int tap_num;
unsigned long tap_set;
void (*prepare_hs400_tuning)(struct tmio_mmc_host *host);
void (*hs400_downgrade)(struct tmio_mmc_host *host);
void (*hs400_complete)(struct tmio_mmc_host *host);