Difuse/difos
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

ramips: mtk-mmc: fix data timeout value

Browse source 
The MT7628 programing guide shows that the correct DTOC unit is
1048576 clocks instead of 65536 clocks. This value is also used
by linux upstream mtk-sd driver. Correct the DTOC register and
also round up its value.

Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
Link: https://github.com/openwrt/openwrt/pull/18896
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Shiji Yang 2025-05-24 16:31:07 +08:00 committed by Hauke Mehrtens
parent ca866328d5
commit e69c867cdf
1 changed files with 4 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
target/linux/ramips/files/drivers/mmc/host/mtk-mmc/sd.c
View file

@ -84,7 +84,7 @@
#endif /* end of --- */
#define DEFAULT_DEBOUNCE (8) /* 8 cycles */
#define DEFAULT_DTOC (40) /* data timeout counter. 65536x40 sclk. */
#define DEFAULT_DTOC (40) /* data timeout counter. 1048576x40 sclk. */
#define CMD_TIMEOUT (HZ / 10) /* 100ms */
#define DAT_TIMEOUT (HZ / 2 * 5) /* 500ms x5 */
@ -414,13 +414,13 @@ static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks)
clk_ns = 1000000000UL / host->sclk;
timeout = ns / clk_ns + clks;
timeout = timeout >> 16; /* in 65536 sclk cycle unit */
timeout = DIV_ROUND_UP(timeout, BIT(20)); /* in 1048576 sclk cycle unit */
timeout = timeout > 1 ? timeout - 1 : 0;
timeout = timeout > 255 ? 255 : timeout;
sdr_set_field(SDC_CFG, SDC_CFG_DTOC, timeout);
N_MSG(OPS, "Set read data timeout: %dns %dclks -> %d x 65536 cycles",
N_MSG(OPS, "Set read data timeout: %dns %dclks -> %d x 1048576 cycles",
ns, clks, timeout + 1);
}
@ -2276,7 +2276,7 @@ static int msdc_drv_probe(struct platform_device *pdev)
host->power_mode = MMC_POWER_OFF;
// host->card_inserted = hw->flags & MSDC_REMOVABLE ? 0 : 1;
host->timeout_ns = 0;
host->timeout_clks = DEFAULT_DTOC * 65536;
host->timeout_clks = DEFAULT_DTOC * 1048576;
host->mrq = NULL;
//init_MUTEX(&host->sem); /* we don't need to support multiple threads access */