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mmc: mediatek: refine msdc timeout api

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Extract msdc timeout api common part to have
better code architecture and avoid redundant code.

Signed-off-by: Chun-Hung Wu <chun-hung.wu@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/1595205759-5825-3-git-send-email-chun-hung.wu@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Chun-Hung Wu 2020-07-20 08:42:37 +08:00 committed by Ulf Hansson
parent 7d176b0ea6
commit 557011b6b8
1 changed files with 22 additions and 10 deletions
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32
drivers/mmc/host/mtk-sd.c
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@ -723,21 +723,21 @@ static void msdc_unprepare_data(struct msdc_host *host, struct mmc_request *mrq)
}
}
/* clock control primitives */
static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks)
static u64 msdc_timeout_cal(struct msdc_host *host, u64 ns, u64 clks)
{
u32 timeout, clk_ns;
u64 timeout, clk_ns;
u32 mode = 0;
host->timeout_ns = ns;
host->timeout_clks = clks;
if (host->mmc->actual_clock == 0) {
timeout = 0;
} else {
clk_ns = 1000000000UL / host->mmc->actual_clock;
timeout = (ns + clk_ns - 1) / clk_ns + clks;
clk_ns = 1000000000ULL;
do_div(clk_ns, host->mmc->actual_clock);
timeout = ns + clk_ns - 1;
do_div(timeout, clk_ns);
timeout += clks;
/* in 1048576 sclk cycle unit */
timeout = (timeout + (0x1 << 20) - 1) >> 20;
timeout = DIV_ROUND_UP(timeout, (0x1 << 20));
if (host->dev_comp->clk_div_bits == 8)
sdr_get_field(host->base + MSDC_CFG,
MSDC_CFG_CKMOD, &mode);
@ -747,9 +747,21 @@ static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks)
/*DDR mode will double the clk cycles for data timeout */
timeout = mode >= 2 ? timeout * 2 : timeout;
timeout = timeout > 1 ? timeout - 1 : 0;
timeout = timeout > 255 ? 255 : timeout;
}
sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, timeout);
return timeout;
}
/* clock control primitives */
static void msdc_set_timeout(struct msdc_host *host, u64 ns, u64 clks)
{
u64 timeout;
host->timeout_ns = ns;
host->timeout_clks = clks;
timeout = msdc_timeout_cal(host, ns, clks);
sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC,
(u32)(timeout > 255 ? 255 : timeout));
}
static void msdc_gate_clock(struct msdc_host *host)