hi Ulf
I don't think you've seen my previous mail :-(
what is your feeling about "mmc: mmci: send stop command to clear the dpsm"
Regards
Ludo
On 1/3/19 11:35 AM, Ludovic BARRE wrote:
hi Ulf
happy new years.
Just a gentleman ping about patch2 of this series
"mmc: mmci: send stop command to clear the dpsm."
Regards
Ludo
On 12/11/18 10:53 AM, Ludovic BARRE wrote:
On 12/11/18 10:47 AM, Ulf Hansson wrote:
On Thu, 6 Dec 2018 at 16:13, Ludovic Barre <ludovic.Barre@xxxxxx> wrote:
From: Ludovic Barre <ludovic.barre@xxxxxx>
On cmd12 (STOP_TRANSMISSION), STM32 sdmmc variant needs to set
cmdstop bit in command register. The CPSM ("Command Path State
Machine")
treats the command as a Stop Transmission command and signals
abort to the DPSM ("Data Path State Machine").
Signed-off-by: Ludovic Barre <ludovic.barre@xxxxxx>
Applied for next, thanks!
thanks
Withholding patch2 for a while, as I need some more time to review it.
No problem,
Regards
Ludo
Kind regards
Uffe
---
drivers/mmc/host/mmci.c | 6 ++++++
drivers/mmc/host/mmci.h | 2 ++
2 files changed, 8 insertions(+)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 13fa640..e352f5a 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -21,6 +21,7 @@
#include <linux/err.h>
#include <linux/highmem.h>
#include <linux/log2.h>
+#include <linux/mmc/mmc.h>
#include <linux/mmc/pm.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
@@ -274,6 +275,7 @@ static struct variant_data variant_stm32_sdmmc = {
.cmdreg_lrsp_crc = MCI_CPSM_STM32_LRSP_CRC,
.cmdreg_srsp_crc = MCI_CPSM_STM32_SRSP_CRC,
.cmdreg_srsp = MCI_CPSM_STM32_SRSP,
+ .cmdreg_stop = MCI_CPSM_STM32_CMDSTOP,
.data_cmd_enable = MCI_CPSM_STM32_CMDTRANS,
.irq_pio_mask = MCI_IRQ_PIO_STM32_MASK,
.datactrl_first = true,
@@ -1100,6 +1102,10 @@ mmci_start_command(struct mmci_host *host,
struct mmc_command *cmd, u32 c)
mmci_reg_delay(host);
}
+ if (host->variant->cmdreg_stop &&
+ cmd->opcode == MMC_STOP_TRANSMISSION)
+ c |= host->variant->cmdreg_stop;
+
c |= cmd->opcode | host->variant->cmdreg_cpsm_enable;
if (cmd->flags & MMC_RSP_PRESENT) {
if (cmd->flags & MMC_RSP_136)
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 550dd39..2422909 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -264,6 +264,7 @@ struct mmci_host;
* @cmdreg_lrsp_crc: enable value for long response with crc
* @cmdreg_srsp_crc: enable value for short response with crc
* @cmdreg_srsp: enable value for short response without crc
+ * @cmdreg_stop: enable value for stop and abort transmission
* @datalength_bits: number of bits in the MMCIDATALENGTH register
* @fifosize: number of bytes that can be written when
MMCI_TXFIFOEMPTY
* is asserted (likewise for RX)
@@ -316,6 +317,7 @@ struct variant_data {
unsigned int cmdreg_lrsp_crc;
unsigned int cmdreg_srsp_crc;
unsigned int cmdreg_srsp;
+ unsigned int cmdreg_stop;
unsigned int datalength_bits;
unsigned int fifosize;
unsigned int fifohalfsize;
--
2.7.4
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