From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-mmc@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org,
Simon Horman <horms@verge.net.au>,
Dirk Behme <dirk.behme@gmail.com>,
Wolfram Sang <wsa+renesas@sang-engineering.com>
Subject: [PATCH 4/4] mmc: tmio: add eMMC support
Date: Wed, 14 Sep 2016 19:05:58 +0200 [thread overview]
Message-ID: <20160914170558.1561-5-wsa+renesas@sang-engineering.com> (raw)
In-Reply-To: <20160914170558.1561-1-wsa+renesas@sang-engineering.com>
We need to add R1 without CRC support, refactor the bus width routine a
little and extend a quirk check.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
drivers/mmc/host/tmio_mmc.h | 3 +++
drivers/mmc/host/tmio_mmc_pio.c | 29 +++++++++++++++++------------
2 files changed, 20 insertions(+), 12 deletions(-)
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 4b501f2d529f6e..637581faf756b1 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -79,6 +79,9 @@
#define CLK_CTL_DIV_MASK 0xff
#define CLK_CTL_SCLKEN BIT(8)
+#define CARD_OPT_WIDTH8 BIT(13)
+#define CARD_OPT_WIDTH BIT(15)
+
#define TMIO_BBS 512 /* Boot block size */
/* Definitions for values the CTRL_SDIO_STATUS register can take. */
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 46b5a456243b84..f21c92ec7121cc 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -340,7 +340,9 @@ static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command
switch (mmc_resp_type(cmd)) {
case MMC_RSP_NONE: c |= RESP_NONE; break;
- case MMC_RSP_R1: c |= RESP_R1; break;
+ case MMC_RSP_R1:
+ case MMC_RSP_R1_NO_CRC:
+ c |= RESP_R1; break;
case MMC_RSP_R1B: c |= RESP_R1B; break;
case MMC_RSP_R2: c |= RESP_R2; break;
case MMC_RSP_R3: c |= RESP_R3; break;
@@ -737,12 +739,13 @@ static int tmio_mmc_start_data(struct tmio_mmc_host *host,
pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n",
data->blksz, data->blocks);
- /* Some hardware cannot perform 2 byte requests in 4 bit mode */
- if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) {
+ /* Some hardware cannot perform 2 byte requests in 4/8 bit mode */
+ if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4 ||
+ host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) {
int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES;
if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) {
- pr_err("%s: %d byte block unsupported in 4 bit mode\n",
+ pr_err("%s: %d byte block unsupported in 4/8 bit mode\n",
mmc_hostname(host->mmc), data->blksz);
return -EINVAL;
}
@@ -922,14 +925,16 @@ static void tmio_mmc_power_off(struct tmio_mmc_host *host)
static void tmio_mmc_set_bus_width(struct tmio_mmc_host *host,
unsigned char bus_width)
{
- switch (bus_width) {
- case MMC_BUS_WIDTH_1:
- sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0);
- break;
- case MMC_BUS_WIDTH_4:
- sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0);
- break;
- }
+ u16 reg = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT)
+ & ~(CARD_OPT_WIDTH | CARD_OPT_WIDTH8);
+
+ /* reg now applies to MMC_BUS_WIDTH_4 */
+ if (bus_width == MMC_BUS_WIDTH_1)
+ reg |= CARD_OPT_WIDTH;
+ else if (bus_width == MMC_BUS_WIDTH_8)
+ reg |= CARD_OPT_WIDTH8;
+
+ sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, reg);
}
/* Set MMC clock / power.
--
2.9.3
next prev parent reply other threads:[~2016-09-14 17:06 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-14 17:05 [PATCH 0/4] tmio: add support for eMMC with 8 bit bus width Wolfram Sang
2016-09-14 17:05 ` [PATCH 1/4] mmc: add define for R1 response without CRC Wolfram Sang
2016-09-14 17:05 ` [PATCH 2/4] mmc: rtsx_pci: use new macro for R1 " Wolfram Sang
2016-09-14 17:05 ` [PATCH 3/4] mmc: rtsx_usb: " Wolfram Sang
2016-09-14 17:05 ` Wolfram Sang [this message]
2016-09-15 11:52 ` [PATCH 0/4] tmio: add support for eMMC with 8 bit bus width Geert Uytterhoeven
2016-09-19 8:00 ` Wolfram Sang
2016-09-19 10:00 ` Ulf Hansson
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