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authorPierre Ossman <drzeus@drzeus.cx>2006-06-30 05:22:26 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-07-02 11:02:05 -0400
commit3192a28f7d34ea8f1d0fef8ca5bc0314b5b5bb19 (patch)
tree8e10e81299096729254d87cb1b7aba94a150c84d /drivers/mmc/sdhci.c
parentc7fa9963ee6317b54e85b260791d603ea2feb8e3 (diff)
[MMC] sdhci: fix interrupt handling
The specification says that interrupts should be cleared before the source is removed. We should also not set unknown bits. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/mmc/sdhci.c')
-rw-r--r--drivers/mmc/sdhci.c80
1 files changed, 24 insertions, 56 deletions
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 445788159647..b9aa60aed7f0 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -124,7 +124,12 @@ static void sdhci_init(struct sdhci_host *host)
124 124
125 sdhci_reset(host, SDHCI_RESET_ALL); 125 sdhci_reset(host, SDHCI_RESET_ALL);
126 126
127 intmask = ~(SDHCI_INT_CARD_INT | SDHCI_INT_BUF_EMPTY | SDHCI_INT_BUF_FULL); 127 intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
128 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
129 SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
130 SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT |
131 SDHCI_INT_BUF_EMPTY | SDHCI_INT_BUF_FULL |
132 SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE;
128 133
129 writel(intmask, host->ioaddr + SDHCI_INT_ENABLE); 134 writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
130 writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE); 135 writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
@@ -360,7 +365,6 @@ static void sdhci_set_transfer_mode(struct sdhci_host *host,
360static void sdhci_finish_data(struct sdhci_host *host) 365static void sdhci_finish_data(struct sdhci_host *host)
361{ 366{
362 struct mmc_data *data; 367 struct mmc_data *data;
363 u32 intmask;
364 u16 blocks; 368 u16 blocks;
365 369
366 BUG_ON(!host->data); 370 BUG_ON(!host->data);
@@ -371,14 +375,6 @@ static void sdhci_finish_data(struct sdhci_host *host)
371 if (host->flags & SDHCI_USE_DMA) { 375 if (host->flags & SDHCI_USE_DMA) {
372 pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len, 376 pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len,
373 (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE); 377 (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
374 } else {
375 intmask = readl(host->ioaddr + SDHCI_SIGNAL_ENABLE);
376 intmask &= ~(SDHCI_INT_BUF_EMPTY | SDHCI_INT_BUF_FULL);
377 writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
378
379 intmask = readl(host->ioaddr + SDHCI_INT_ENABLE);
380 intmask &= ~(SDHCI_INT_BUF_EMPTY | SDHCI_INT_BUF_FULL);
381 writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
382 } 378 }
383 379
384 /* 380 /*
@@ -512,31 +508,9 @@ static void sdhci_finish_command(struct sdhci_host *host)
512 508
513 DBG("Ending cmd (%x)\n", host->cmd->opcode); 509 DBG("Ending cmd (%x)\n", host->cmd->opcode);
514 510
515 if (host->cmd->data) { 511 if (host->cmd->data)
516 u32 intmask;
517
518 host->data = host->cmd->data; 512 host->data = host->cmd->data;
519 513 else
520 if (!(host->flags & SDHCI_USE_DMA)) {
521 /*
522 * Don't enable the interrupts until now to make sure we
523 * get stable handling of the FIFO.
524 */
525 intmask = readl(host->ioaddr + SDHCI_INT_ENABLE);
526 intmask |= SDHCI_INT_BUF_EMPTY | SDHCI_INT_BUF_FULL;
527 writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
528
529 intmask = readl(host->ioaddr + SDHCI_SIGNAL_ENABLE);
530 intmask |= SDHCI_INT_BUF_EMPTY | SDHCI_INT_BUF_FULL;
531 writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
532
533 /*
534 * The buffer interrupts are to unreliable so we
535 * start the transfer immediatly.
536 */
537 sdhci_transfer_pio(host);
538 }
539 } else
540 tasklet_schedule(&host->finish_tasklet); 514 tasklet_schedule(&host->finish_tasklet);
541 515
542 host->cmd = NULL; 516 host->cmd = NULL;
@@ -914,50 +888,44 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id, struct pt_regs *regs)
914 888
915 DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask); 889 DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask);
916 890
917 if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) 891 if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
892 writel(intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE),
893 host->ioaddr + SDHCI_INT_STATUS);
918 tasklet_schedule(&host->card_tasklet); 894 tasklet_schedule(&host->card_tasklet);
895 }
919 896
920 if (intmask & SDHCI_INT_CMD_MASK) { 897 intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
921 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
922 898
899 if (intmask & SDHCI_INT_CMD_MASK) {
923 writel(intmask & SDHCI_INT_CMD_MASK, 900 writel(intmask & SDHCI_INT_CMD_MASK,
924 host->ioaddr + SDHCI_INT_STATUS); 901 host->ioaddr + SDHCI_INT_STATUS);
902 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
925 } 903 }
926 904
927 if (intmask & SDHCI_INT_DATA_MASK) { 905 if (intmask & SDHCI_INT_DATA_MASK) {
928 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
929
930 writel(intmask & SDHCI_INT_DATA_MASK, 906 writel(intmask & SDHCI_INT_DATA_MASK,
931 host->ioaddr + SDHCI_INT_STATUS); 907 host->ioaddr + SDHCI_INT_STATUS);
908 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
932 } 909 }
933 910
934 intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK); 911 intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
935 912
936 if (intmask & SDHCI_INT_CARD_INT) {
937 printk(KERN_ERR "%s: Unexpected card interrupt. Please "
938 "report this to " BUGMAIL ".\n",
939 mmc_hostname(host->mmc));
940 sdhci_dumpregs(host);
941 }
942
943 if (intmask & SDHCI_INT_BUS_POWER) { 913 if (intmask & SDHCI_INT_BUS_POWER) {
944 printk(KERN_ERR "%s: Unexpected bus power interrupt. Please " 914 printk(KERN_ERR "%s: Card is consuming too much power!\n",
945 "report this to " BUGMAIL ".\n",
946 mmc_hostname(host->mmc)); 915 mmc_hostname(host->mmc));
947 sdhci_dumpregs(host); 916 writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS);
948 } 917 }
949 918
950 if (intmask & SDHCI_INT_ACMD12ERR) { 919 intmask &= SDHCI_INT_BUS_POWER;
951 printk(KERN_ERR "%s: Unexpected auto CMD12 error. Please " 920
921 if (intmask) {
922 printk(KERN_ERR "%s: Unexpected interrupt 0x%08x. Please "
952 "report this to " BUGMAIL ".\n", 923 "report this to " BUGMAIL ".\n",
953 mmc_hostname(host->mmc)); 924 mmc_hostname(host->mmc), intmask);
954 sdhci_dumpregs(host); 925 sdhci_dumpregs(host);
955 926
956 writew(~0, host->ioaddr + SDHCI_ACMD12_ERR);
957 }
958
959 if (intmask)
960 writel(intmask, host->ioaddr + SDHCI_INT_STATUS); 927 writel(intmask, host->ioaddr + SDHCI_INT_STATUS);
928 }
961 929
962 result = IRQ_HANDLED; 930 result = IRQ_HANDLED;
963 931