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mmc: tmio: check ILL_FUNC instead of CBSY 

Some controllers need to check SD bus status when writing data.
Then, it checks ILL_FUNC bit on SD_INFO2 register,
and this method is controlled via TMIO_MMC_HAS_IDLE_WAIT flags.
Same method is required on tmio_mmc_data_irq() which will
be called after writing data.

Current driver is checking CBSY bit for this purpose,
but, some controllers doesn't have CBSY bit.
This patch checks ILL_FUNC bit instead of CBSY bit
if it has TMIO_MMC_HAS_IDLE_WAIT flags

[Kuninori Morimoto: tidyuped for upstreaming]

Tested-by: Nguyen Xuan Nui <nx-nui@jinso.co.jp>
Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
wifi-calibration
Shinobu Uehara 2014-08-24 20:01:32 -07:00 committed by Ulf Hansson
parent 6b98757e53
commit 81e888daab
1 changed files with 12 additions and 1 deletions
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13
drivers/mmc/host/tmio_mmc_pio.c
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@ -490,6 +490,9 @@ static void tmio_mmc_data_irq(struct tmio_mmc_host *host)
goto out;
if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) {
u32 status = sd_ctrl_read32(host, CTL_STATUS);
bool done = false;
/*
* Has all data been written out yet? Testing on SuperH showed,
* that in most cases the first interrupt comes already with the
@ -498,7 +501,15 @@ static void tmio_mmc_data_irq(struct tmio_mmc_host *host)
* DATAEND interrupt with the BUSY bit set, in this cases
* waiting for one more interrupt fixes the problem.
*/
if (!(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_CMD_BUSY)) {
if (host->pdata->flags & TMIO_MMC_HAS_IDLE_WAIT) {
if (status & TMIO_STAT_ILL_FUNC)
done = true;
} else {
if (!(status & TMIO_STAT_CMD_BUSY))
done = true;
}
if (done) {
tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
tasklet_schedule(&host->dma_complete);
}