[src/trunk]: src/sys/arch/arm/amlogic sdhc stability improvements

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b8e561639448
branches:  trunk
changeset: 336744:b8e561639448
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Mon Mar 16 21:37:35 2015 +0000

description:
sdhc stability improvements

diffstat:

 sys/arch/arm/amlogic/amlogic_sdhc.c |  64 ++++++++++++++++++++++--------------
 1 files changed, 39 insertions(+), 25 deletions(-)

diffs (124 lines):

diff -r acae587ac963 -r b8e561639448 sys/arch/arm/amlogic/amlogic_sdhc.c
--- a/sys/arch/arm/amlogic/amlogic_sdhc.c       Mon Mar 16 20:32:08 2015 +0000
+++ b/sys/arch/arm/amlogic/amlogic_sdhc.c       Mon Mar 16 21:37:35 2015 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: amlogic_sdhc.c,v 1.2 2015/03/08 15:38:25 jmcneill Exp $ */
+/* $NetBSD: amlogic_sdhc.c,v 1.3 2015/03/16 21:37:35 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -29,7 +29,7 @@
 #include "locators.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: amlogic_sdhc.c,v 1.2 2015/03/08 15:38:25 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: amlogic_sdhc.c,v 1.3 2015/03/16 21:37:35 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -430,7 +430,7 @@
 amlogic_sdhc_exec_command(sdmmc_chipset_handle_t sch, struct sdmmc_command *cmd)
 {
        struct amlogic_sdhc_softc *sc = sch;
-       uint32_t cmdval = 0, cntl, srst, pdma;
+       uint32_t cmdval = 0, cntl, srst, pdma, ictl;
        int i;
 
        KASSERT(cmd->c_blklen <= 512);
@@ -446,9 +446,6 @@
                goto done;
        }
 
-       while (SDHC_READ(sc, SD_STAT_REG) & __BIT(24))
-               delay(10);
-
        if (cmd->c_opcode == MMC_STOP_TRANSMISSION)
                cmdval |= SD_SEND_DATA_STOP;
        if (cmd->c_flags & SCF_RSP_PRESENT)
@@ -460,6 +457,12 @@
        if ((cmd->c_flags & SCF_RSP_CRC) == 0)
                cmdval |= SD_SEND_RESPONSE_NO_CRC;
 
+       SDHC_WRITE(sc, SD_ICTL_REG, 0);
+       SDHC_WRITE(sc, SD_ISTA_REG, SD_INT_CLEAR);
+       sc->sc_intr_ista = 0;
+
+       ictl = SD_INT_ERROR;
+
        cntl = SDHC_READ(sc, SD_CNTL_REG);
        cntl &= ~SD_CNTL_PACK_LEN;
        if (cmd->c_datalen > 0) {
@@ -477,17 +480,26 @@
                cntl |= __SHIFTIN(cmd->c_blklen & 0x1ff, SD_CNTL_PACK_LEN);
                                    
                cmdval |= __SHIFTIN(nblks - 1, SD_SEND_TOTAL_PACK);
+
+               if (ISSET(cmd->c_flags, SCF_CMD_READ)) {
+                       ictl |= SD_INT_DATA_COMPLETE;
+               } else {
+                       ictl |= SD_INT_DMA_DONE;
+               }
+       } else {
+               ictl |= SD_INT_RESP_COMPLETE;
        }
+
+       SDHC_WRITE(sc, SD_ICTL_REG, ictl);
+
        SDHC_WRITE(sc, SD_CNTL_REG, cntl);
 
-       SDHC_WRITE(sc, SD_ISTA_REG, SD_INT_CLEAR);
-       sc->sc_intr_ista = 0;
-       SDHC_WRITE(sc, SD_ICTL_REG,
-           SD_INT_ERROR | SD_INT_DATA_COMPLETE | SD_INT_RESP_COMPLETE |
-           SD_INT_DMA_DONE);
-
        pdma = SDHC_READ(sc, SD_PDMA_REG);
-       pdma |= SD_PDMA_DMA_MODE;
+       if (cmd->c_datalen > 0) {
+               pdma |= SD_PDMA_DMA_MODE;
+       } else {
+               pdma &= ~SD_PDMA_DMA_MODE;
+       }
        SDHC_WRITE(sc, SD_PDMA_REG, pdma);
 
        SDHC_WRITE(sc, SD_ARGU_REG, cmd->c_arg);
@@ -506,7 +518,19 @@
        cmd->c_resid = cmd->c_datalen;
        SDHC_WRITE(sc, SD_SEND_REG, cmdval | cmd->c_opcode);
 
-       if (cmd->c_flags & SCF_RSP_PRESENT) {
+       if (cmd->c_datalen > 0) {
+               uint32_t wbit = ISSET(cmd->c_flags, SCF_CMD_READ) ?
+                   SD_INT_DATA_COMPLETE : SD_INT_DMA_DONE;
+               cmd->c_error = amlogic_sdhc_wait_ista(sc,
+                   SD_INT_ERROR | wbit, hz * 10);
+               if (cmd->c_error == 0 &&
+                   (sc->sc_intr_ista & SD_INT_ERROR)) {
+                       cmd->c_error = ETIMEDOUT;
+               }
+               if (cmd->c_error) {
+                       goto done;
+               }
+       } else {
                cmd->c_error = amlogic_sdhc_wait_ista(sc,
                    SD_INT_ERROR | SD_INT_RESP_COMPLETE, hz * 10);
                if (cmd->c_error == 0 && (sc->sc_intr_ista & SD_INT_ERROR)) {
@@ -521,17 +545,7 @@
                }
        }
 
-       if (cmd->c_datalen > 0) {
-               cmd->c_error = amlogic_sdhc_wait_ista(sc,
-                   SD_INT_ERROR | SD_INT_DMA_DONE, hz * 10);
-               if (cmd->c_error == 0 &&
-                   (sc->sc_intr_ista & SD_INT_ERROR)) {
-                       cmd->c_error = ETIMEDOUT;
-               }
-               if (cmd->c_error) {
-                       goto done;
-               }
-       }
+       SDHC_WRITE(sc, SD_ISTA_REG, sc->sc_intr_ista);
 
        if (cmd->c_flags & SCF_RSP_PRESENT) {
                pdma = SDHC_READ(sc, SD_PDMA_REG);