From 12cbe8225e29f016e6ece2352d88585838e27ddd Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Wed, 29 Jan 2020 21:37:04 +0100 Subject: [PATCH] mmc: tmio: refactor tuning execution into SDHI driver MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Move Renesas specific code for executing the tuning with a SCC into the SDHI driver and leave only a generic call in the TMIO driver. Simplify the code a little by removing init_tuning() and prepare_tuning() callbacks. The latter is directly folded into the new execute_tuning() callbacks. Signed-off-by: Wolfram Sang Reviewed-by: Niklas Söderlund Reviewed-by: Yoshihiro Shimoda Link: https://lore.kernel.org/r/20200129203709.30493-2-wsa+renesas@sang-engineering.com Signed-off-by: Ulf Hansson --- drivers/mmc/host/renesas_sdhi_core.c | 45 ++++++++++++++++++++-------- drivers/mmc/host/tmio_mmc.h | 3 +- drivers/mmc/host/tmio_mmc_core.c | 33 +++----------------- 3 files changed, 37 insertions(+), 44 deletions(-) diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c index 6a112454ca267..b3ab66f963f8c 100644 --- a/drivers/mmc/host/renesas_sdhi_core.c +++ b/drivers/mmc/host/renesas_sdhi_core.c @@ -321,17 +321,6 @@ static unsigned int renesas_sdhi_init_tuning(struct tmio_mmc_host *host) SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_MASK; } -static void renesas_sdhi_prepare_tuning(struct tmio_mmc_host *host, - unsigned long tap) -{ - struct renesas_sdhi *priv = host_to_priv(host); - - priv->doing_tune = true; - - /* Set sampling clock position */ - sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, tap); -} - static void renesas_sdhi_hs400_complete(struct tmio_mmc_host *host) { struct renesas_sdhi *priv = host_to_priv(host); @@ -500,6 +489,37 @@ static int renesas_sdhi_select_tuning(struct tmio_mmc_host *host) return 0; } +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) + return 0; /* Tuning is not supported */ + + if (host->tap_num * 2 >= sizeof(host->taps) * BITS_PER_BYTE) { + dev_warn_once(&host->pdev->dev, + "Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n"); + return 0; + } + + priv->doing_tune = true; + bitmap_zero(host->taps, host->tap_num * 2); + + /* Issue CMD19 twice for each tap */ + for (i = 0; i < 2 * host->tap_num; i++) { + /* Set sampling clock position */ + sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, i % host->tap_num); + + ret = mmc_send_tuning(host->mmc, opcode, NULL); + if (ret == 0) + set_bit(i, host->taps); + } + + return renesas_sdhi_select_tuning(host); +} + static bool renesas_sdhi_manual_correction(struct tmio_mmc_host *host, bool use_4tap) { struct renesas_sdhi *priv = host_to_priv(host); @@ -877,8 +897,7 @@ int renesas_sdhi_probe(struct platform_device *pdev, if (!hit) dev_warn(&host->pdev->dev, "Unknown clock rate for tuning\n"); - host->init_tuning = renesas_sdhi_init_tuning; - host->prepare_tuning = renesas_sdhi_prepare_tuning; + host->execute_tuning = renesas_sdhi_execute_tuning; host->select_tuning = renesas_sdhi_select_tuning; host->check_scc_error = renesas_sdhi_check_scc_error; host->prepare_hs400_tuning = diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index c5ba13fae3992..bfebbe368f021 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -176,14 +176,13 @@ struct tmio_mmc_host { int (*write16_hook)(struct tmio_mmc_host *host, int addr); void (*reset)(struct tmio_mmc_host *host); void (*hw_reset)(struct tmio_mmc_host *host); - void (*prepare_tuning)(struct tmio_mmc_host *host, unsigned long tap); bool (*check_scc_error)(struct tmio_mmc_host *host); /* * Mandatory callback for tuning to occur which is optional for SDR50 * and mandatory for SDR104. */ - unsigned int (*init_tuning)(struct tmio_mmc_host *host); + int (*execute_tuning)(struct tmio_mmc_host *host, u32 opcode); int (*select_tuning)(struct tmio_mmc_host *host); /* Tuning values: 1 for success, 0 for failure */ diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c index 1e424bcdbd5f5..9108247d8c141 100644 --- a/drivers/mmc/host/tmio_mmc_core.c +++ b/drivers/mmc/host/tmio_mmc_core.c @@ -718,38 +718,13 @@ static int tmio_mmc_start_data(struct tmio_mmc_host *host, static int tmio_mmc_execute_tuning(struct mmc_host *mmc, u32 opcode) { struct tmio_mmc_host *host = mmc_priv(mmc); - int i, ret = 0; - - if (!host->init_tuning || !host->select_tuning) - /* Tuning is not supported */ - goto out; - - host->tap_num = host->init_tuning(host); - if (!host->tap_num) - /* Tuning is not supported */ - goto out; - - if (host->tap_num * 2 >= sizeof(host->taps) * BITS_PER_BYTE) { - dev_warn_once(&host->pdev->dev, - "Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n"); - goto out; - } - - bitmap_zero(host->taps, host->tap_num * 2); - - /* Issue CMD19 twice for each tap */ - for (i = 0; i < 2 * host->tap_num; i++) { - if (host->prepare_tuning) - host->prepare_tuning(host, i % host->tap_num); + int ret; - ret = mmc_send_tuning(mmc, opcode, NULL); - if (ret == 0) - set_bit(i, host->taps); - } + if (!host->execute_tuning) + return 0; - ret = host->select_tuning(host); + ret = host->execute_tuning(host, opcode); -out: if (ret < 0) { dev_warn(&host->pdev->dev, "Tuning procedure failed\n"); tmio_mmc_hw_reset(mmc); -- 2.39.5