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mmc: tmio: factor out common parts of the reset routine 

Some TMIO variants need specific actions in their reset routine, but
they are all based on a generic reset routine. So, the optional 'reset'
callback will now only take care of the additional stuff and we will
have a generic function around it. Less code, easier to maintain, and
much more readable. Code in tmio_mmc.c is untested but in my TC6387XB
datasheet the SDIO part is reset independently from the SD part, too.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20200820132538.24758-5-wsa+renesas@sang-engineering.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wolfram Sang 2020-08-20 15:25:36 +02:00 committed by Ulf Hansson
parent a8c83064e7
commit 576146ea4e
3 changed files with 7 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/mmc/host/renesas_sdhi_core.c
View File

@ -635,17 +635,6 @@ static void renesas_sdhi_reset(struct tmio_mmc_host *host)
{
struct renesas_sdhi *priv = host_to_priv(host);
/* FIXME - should we set stop clock reg here */
sd_ctrl_write16(host, CTL_RESET_SD, 0x0000);
usleep_range(10000, 11000);
sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
usleep_range(10000, 11000);
if (host->pdata->flags & TMIO_MMC_SDIO_IRQ) {
sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001);
}
renesas_sdhi_reset_scc(host, priv);
renesas_sdhi_reset_hs400_mode(host, priv);

8
drivers/mmc/host/tmio_mmc.c
View File

@ -77,18 +77,10 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
static void tmio_mmc_reset(struct tmio_mmc_host *host)
{
/* FIXME - should we set stop clock reg here */
sd_ctrl_write16(host, CTL_RESET_SD, 0x0000);
sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000);
usleep_range(10000, 11000);
sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001);
usleep_range(10000, 11000);
if (host->pdata->flags & TMIO_MMC_SDIO_IRQ) {
sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001);
}
}
#ifdef CONFIG_PM_SLEEP

14
drivers/mmc/host/tmio_mmc_core.c
View File

@ -172,6 +172,9 @@ static void tmio_mmc_reset(struct tmio_mmc_host *host)
sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
usleep_range(10000, 11000);
if (host->reset)
host->reset(host);
if (host->pdata->flags & TMIO_MMC_SDIO_IRQ) {
sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001);
@ -216,7 +219,7 @@ static void tmio_mmc_reset_work(struct work_struct *work)
spin_unlock_irqrestore(&host->lock, flags);
host->reset(host);
tmio_mmc_reset(host);
/* Ready for new calls */
host->mrq = NULL;
@ -721,7 +724,7 @@ static int tmio_mmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
if (ret < 0) {
dev_warn(&host->pdev->dev, "Tuning procedure failed\n");
host->reset(host);
tmio_mmc_reset(host);
}
return ret;
@ -1144,9 +1147,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host)
mmc->caps & MMC_CAP_NEEDS_POLL ||
!mmc_card_is_removable(mmc));
if (!_host->reset)
_host->reset = tmio_mmc_reset;
/*
* On Gen2+, eMMC with NONREMOVABLE currently fails because native
* hotplug gets disabled. It seems RuntimePM related yet we need further
@ -1168,7 +1168,7 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host)
_host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
_host->set_clock(_host, 0);
_host->reset(_host);
tmio_mmc_reset(_host);
_host->sdcard_irq_mask = sd_ctrl_read16_and_16_as_32(_host, CTL_IRQ_MASK);
tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL);
@ -1271,7 +1271,7 @@ int tmio_mmc_host_runtime_resume(struct device *dev)
struct tmio_mmc_host *host = dev_get_drvdata(dev);
tmio_mmc_clk_enable(host);
host->reset(host);
tmio_mmc_reset(host);
if (host->clk_cache)
host->set_clock(host, host->clk_cache);