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Add a SDHC_FLAG_NO_TIMEOUT quirk to handle spurious timeouts on Tegra K1 

during data transfers. While here, increase the soft timeout for DMA
transfers from 1s to 3s.
This commit is contained in:
jmcneill 2015-07-23 23:52:54 +00:00
parent a0ed8809cc
commit 3cc75aa740
2 changed files with 17 additions and 5 deletions
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19
sys/dev/sdmmc/sdhc.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: sdhc.c,v 1.60 2015/07/22 09:54:42 skrll Exp $ */
/* $NetBSD: sdhc.c,v 1.61 2015/07/23 23:52:54 jmcneill Exp $ */
/* $OpenBSD: sdhc.c,v 1.25 2009/01/13 19:44:20 grange Exp $ */
/*
@ -23,7 +23,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sdhc.c,v 1.60 2015/07/22 09:54:42 skrll Exp $");
__KERNEL_RCSID(0, "$NetBSD: sdhc.c,v 1.61 2015/07/23 23:52:54 jmcneill Exp $");
#ifdef _KERNEL_OPT
#include "opt_sdmmc.h"
@ -55,7 +55,7 @@ void sdhc_dump_regs(struct sdhc_host *);
#define SDHC_COMMAND_TIMEOUT hz
#define SDHC_BUFFER_TIMEOUT hz
#define SDHC_TRANSFER_TIMEOUT hz
#define SDHC_DMA_TIMEOUT hz
#define SDHC_DMA_TIMEOUT (hz*3)
struct sdhc_host {
struct sdhc_softc *sc; /* host controller device */
@ -1119,6 +1119,17 @@ sdhc_exec_command(sdmmc_chipset_handle_t sch, struct sdmmc_command *cmd)
mutex_exit(&hp->intr_mtx);
}
if (ISSET(hp->sc->sc_flags, SDHC_FLAG_NO_TIMEOUT)) {
const uint16_t eintr = SDHC_CMD_TIMEOUT_ERROR;
if (cmd->c_data != NULL) {
HCLR2(hp, SDHC_EINTR_SIGNAL_EN, eintr);
HCLR2(hp, SDHC_EINTR_STATUS_EN, eintr);
} else {
HSET2(hp, SDHC_EINTR_SIGNAL_EN, eintr);
HSET2(hp, SDHC_EINTR_STATUS_EN, eintr);
}
}
/*
* Start the MMC command, or mark `cmd' as failed and return.
*/
@ -1332,7 +1343,7 @@ sdhc_transfer_data(struct sdhc_host *hp, struct sdmmc_command *cmd)
if (hp->sc->sc_vendor_transfer_data_dma != NULL) {
error = hp->sc->sc_vendor_transfer_data_dma(sc, cmd);
if (error == 0 && !sdhc_wait_intr(hp,
SDHC_TRANSFER_COMPLETE, SDHC_TRANSFER_TIMEOUT)) {
SDHC_TRANSFER_COMPLETE, SDHC_DMA_TIMEOUT)) {
error = ETIMEDOUT;
}
} else {

3
sys/dev/sdmmc/sdhcvar.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: sdhcvar.h,v 1.18 2015/05/03 11:46:25 jmcneill Exp $ */
/* $NetBSD: sdhcvar.h,v 1.19 2015/07/23 23:52:54 jmcneill Exp $ */
/* $OpenBSD: sdhcvar.h,v 1.3 2007/09/06 08:01:01 jsg Exp $ */
/*
@ -54,6 +54,7 @@ struct sdhc_softc {
#define SDHC_FLAG_EXTDMA_DMAEN 0x00008000 /* ext. dma need SDHC_DMA_ENABLE */
#define SDHC_FLAG_NO_CLKBASE 0x00020000 /* ignore clkbase register */
#define SDHC_FLAG_SINGLE_POWER_WRITE 0x00040000
#define SDHC_FLAG_NO_TIMEOUT 0x00080000 /* ignore timeout interrupts */
uint32_t sc_clkbase;
int sc_clkmsk; /* Mask for SDCLK */