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authorMasahiro Yamada <yamada.masahiro@socionext.com>2018-01-18 01:28:14 +0900
committerUlf Hansson <ulf.hansson@linaro.org>2018-03-05 13:03:49 +0100
commitb12a7a28f860c3ab078ae306e13a659ec70b3c33 (patch)
tree2cf9864b21688fb22f3a5a9e3fc2310c0fd62264 /drivers/mmc
parentc7cd630a9751b9ec8bba37edbba06a29e7d9a14b (diff)
mmc: tmio: move TMIO_MASK_{READOP, WRITEOP} handling to correct place
As far as I tested the IP on UniPhier SoCs, TMIO_STAT_{RXRDY,TXRQ} are asserted for DMA mode as well as for PIO. I need to disable the those IRQs in dma_ops->start hook, otherwise the DMA transfer fails with the following error message: PIO IRQ in DMA mode! Renesas chips are the same cases since I see their dma_ops->start hooks explicitly clear TMIO_STAT_{RXRDY,TXRQ} (with nice comment!). If we do this sanity check in TMIO MMC core, RXRDY/TXRQ handling should be entirely moved to the core. tmio_mmc_cmd_irq() will be a suitable place to disable them. The probe function sets TMIO_MASK_{READOP,WRITEOP} but this is odd. /* Unmask the IRQs we want to know about */ if (!_host->chan_rx) irq_mask |= TMIO_MASK_READOP; if (!_host->chan_tx) irq_mask |= TMIO_MASK_WRITEOP; At this point, _host->{chan_rx,chan_tx} are _always_ NULL because tmio_mmc_request_dma() is called after this code. Consequently, TMIO_MASK_{READOP,WRITEOP} are set here whether DMA is used or not. Remove this pointless code. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/renesas_sdhi_internal_dmac.c6
-rw-r--r--drivers/mmc/host/renesas_sdhi_sys_dmac.c4
-rw-r--r--drivers/mmc/host/tmio_mmc_core.c20
3 files changed, 10 insertions, 20 deletions
diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
index c063b2d0364d..a04f31fea72f 100644
--- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
@@ -145,7 +145,6 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host,
u32 dtran_mode = DTRAN_MODE_BUS_WID_TH | DTRAN_MODE_ADDR_MODE;
enum dma_data_direction dir;
int ret;
- u32 irq_mask;
/* This DMAC cannot handle if sg_len is not 1 */
WARN_ON(host->sg_len > 1);
@@ -157,11 +156,9 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host,
if (data->flags & MMC_DATA_READ) {
dtran_mode |= DTRAN_MODE_CH_NUM_CH1;
dir = DMA_FROM_DEVICE;
- irq_mask = TMIO_STAT_RXRDY;
} else {
dtran_mode |= DTRAN_MODE_CH_NUM_CH0;
dir = DMA_TO_DEVICE;
- irq_mask = TMIO_STAT_TXRQ;
}
ret = dma_map_sg(&host->pdev->dev, sg, host->sg_len, dir);
@@ -170,9 +167,6 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host,
renesas_sdhi_internal_dmac_enable_dma(host, true);
- /* disable PIO irqs to avoid "PIO IRQ in DMA mode!" */
- tmio_mmc_disable_mmc_irqs(host, irq_mask);
-
/* set dma parameters */
renesas_sdhi_internal_dmac_dm_write(host, DM_CM_DTRAN_MODE,
dtran_mode);
diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
index 434afa9dd9a1..4bb46c489d71 100644
--- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
@@ -205,8 +205,6 @@ static void renesas_sdhi_sys_dmac_start_dma_rx(struct tmio_mmc_host *host)
return;
}
- tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_RXRDY);
-
/* The only sg element can be unaligned, use our bounce buffer then */
if (!aligned) {
sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length);
@@ -280,8 +278,6 @@ static void renesas_sdhi_sys_dmac_start_dma_tx(struct tmio_mmc_host *host)
return;
}
- tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_TXRQ);
-
/* The only sg element can be unaligned, use our bounce buffer then */
if (!aligned) {
unsigned long flags;
diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
index add095368482..75f0d6e273b5 100644
--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -621,15 +621,21 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat)
*/
if (host->data && (!cmd->error || cmd->error == -EILSEQ)) {
if (host->data->flags & MMC_DATA_READ) {
- if (host->force_pio || !host->chan_rx)
+ if (host->force_pio || !host->chan_rx) {
tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP);
- else
+ } else {
+ tmio_mmc_disable_mmc_irqs(host,
+ TMIO_MASK_READOP);
tasklet_schedule(&host->dma_issue);
+ }
} else {
- if (host->force_pio || !host->chan_tx)
+ if (host->force_pio || !host->chan_tx) {
tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP);
- else
+ } else {
+ tmio_mmc_disable_mmc_irqs(host,
+ TMIO_MASK_WRITEOP);
tasklet_schedule(&host->dma_issue);
+ }
}
} else {
schedule_work(&host->done);
@@ -1273,12 +1279,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host)
_host->sdcard_irq_mask = sd_ctrl_read16_and_16_as_32(_host, CTL_IRQ_MASK);
tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL);
- /* Unmask the IRQs we want to know about */
- if (!_host->chan_rx)
- irq_mask |= TMIO_MASK_READOP;
- if (!_host->chan_tx)
- irq_mask |= TMIO_MASK_WRITEOP;
-
_host->sdcard_irq_mask &= ~irq_mask;
if (_host->native_hotplug)