static int sdhci_msm_execute_tuning(struct sdhci_host *host, u32 opcode)
{
int tuning_seq_cnt = 3;
u8 phase, tuned_phases[16], tuned_phase_cnt = 0;
int rc;
struct mmc_host *mmc = host->mmc;
struct mmc_ios ios = host->mmc->ios;
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
/*
* Tuning is required for SDR104, HS200 and HS400 cards and
* if clock frequency is greater than 100MHz in these modes.
*/
if (host->clock <= CORE_FREQ_100MHZ ||
!(ios.timing == MMC_TIMING_MMC_HS400 ||
ios.timing == MMC_TIMING_MMC_HS200 ||
ios.timing == MMC_TIMING_UHS_SDR104))
return 0;
retry:
/* First of all reset the tuning block */
rc = msm_init_cm_dll(host);
if (rc)
return rc;
phase = 0;
do {
/* Set the phase in delay line hw block */
rc = msm_config_cm_dll_phase(host, phase);
if (rc)
return rc;
msm_host->saved_tuning_phase = phase;
rc = mmc_send_tuning(mmc, opcode, NULL);
if (!rc) {
/* Tuning is successful at this tuning point */
tuned_phases[tuned_phase_cnt++] = phase;
dev_dbg(mmc_dev(mmc), "%s: Found good phase = %d\n",
mmc_hostname(mmc), phase);
}
} while (++phase < ARRAY_SIZE(tuned_phases));
if (tuned_phase_cnt) {
rc = msm_find_most_appropriate_phase(host, tuned_phases,
tuned_phase_cnt);
if (rc < 0)
return rc;
else
phase = rc;
/*
* Finally set the selected phase in delay
* line hw block.
*/
rc = msm_config_cm_dll_phase(host, phase);
if (rc)
return rc;
dev_dbg(mmc_dev(mmc), "%s: Setting the tuning phase to %d\n",
mmc_hostname(mmc), phase);
} else {
if (--tuning_seq_cnt)
goto retry;
/* Tuning failed */
dev_dbg(mmc_dev(mmc), "%s: No tuning point found\n",
mmc_hostname(mmc));
rc = -EIO;
}
if (!rc)
msm_host->tuning_done = true;
return rc;
}
static int sdhci_msm_execute_tuning(struct sdhci_host *host, u32 opcode)
{
int tuning_seq_cnt = 3;
u8 phase, *data_buf, tuned_phases[16], tuned_phase_cnt = 0;
const u32 *tuning_block_pattern = tuning_block_64;
int size = sizeof(tuning_block_64); /* Pattern size in bytes */
int rc;
struct mmc_host *mmc = host->mmc;
struct mmc_ios ios = host->mmc->ios;
/*
* Tuning is required for SDR104, HS200 and HS400 cards and
* if clock frequency is greater than 100MHz in these modes.
*/
if (host->clock <= 100 * 1000 * 1000 ||
!((ios.timing == MMC_TIMING_MMC_HS200) ||
(ios.timing == MMC_TIMING_UHS_SDR104)))
return 0;
if ((opcode == MMC_SEND_TUNING_BLOCK_HS200) &&
(mmc->ios.bus_width == MMC_BUS_WIDTH_8)) {
tuning_block_pattern = tuning_block_128;
size = sizeof(tuning_block_128);
}
data_buf = kmalloc(size, GFP_KERNEL);
if (!data_buf)
return -ENOMEM;
retry:
/* First of all reset the tuning block */
rc = msm_init_cm_dll(host);
if (rc)
goto out;
phase = 0;
do {
struct mmc_command cmd = { 0 };
struct mmc_data data = { 0 };
struct mmc_request mrq = {
.cmd = &cmd,
.data = &data
};
struct scatterlist sg;
/* Set the phase in delay line hw block */
rc = msm_config_cm_dll_phase(host, phase);
if (rc)
goto out;
cmd.opcode = opcode;
cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
data.blksz = size;
data.blocks = 1;
data.flags = MMC_DATA_READ;
data.timeout_ns = NSEC_PER_SEC; /* 1 second */
data.sg = &sg;
data.sg_len = 1;
sg_init_one(&sg, data_buf, size);
memset(data_buf, 0, size);
mmc_wait_for_req(mmc, &mrq);
if (!cmd.error && !data.error &&
!memcmp(data_buf, tuning_block_pattern, size)) {
/* Tuning is successful at this tuning point */
tuned_phases[tuned_phase_cnt++] = phase;
dev_dbg(mmc_dev(mmc), "%s: Found good phase = %d\n",
mmc_hostname(mmc), phase);
}
} while (++phase < ARRAY_SIZE(tuned_phases));
if (tuned_phase_cnt) {
rc = msm_find_most_appropriate_phase(host, tuned_phases,
tuned_phase_cnt);
if (rc < 0)
goto out;
else
phase = rc;
/*
* Finally set the selected phase in delay
* line hw block.
*/
rc = msm_config_cm_dll_phase(host, phase);
if (rc)
goto out;
dev_dbg(mmc_dev(mmc), "%s: Setting the tuning phase to %d\n",
mmc_hostname(mmc), phase);
} else {
if (--tuning_seq_cnt)
goto retry;
/* Tuning failed */
dev_dbg(mmc_dev(mmc), "%s: No tuning point found\n",
mmc_hostname(mmc));
rc = -EIO;
}
out:
kfree(data_buf);
return rc;
}
