2018-04-18 02:07:27 +00:00
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From c61716be1470b9857b573e9e3779766aa495239e Mon Sep 17 00:00:00 2001
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2018-02-27 01:43:53 +00:00
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From: Kevin Mihelich <kevin@archlinuxarm.org>
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Date: Sun, 25 Feb 2018 16:38:04 -0700
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Subject: [PATCH 7/9] Fix mvsdio SD card detection
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Helps SD card detection on PPv4.
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Signed-off-by: Kevin Mihelich <kevin@archlinuxarm.org>
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---
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drivers/mmc/core/core.c | 2 +-
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drivers/mmc/core/sd.c | 9 +++++++++
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drivers/mmc/host/mvsdio.c | 2 ++
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3 files changed, 12 insertions(+), 1 deletion(-)
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diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
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2018-04-18 02:07:27 +00:00
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index 121ce50b6d5e..4236a5e8043b 100644
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2018-02-27 01:43:53 +00:00
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--- a/drivers/mmc/core/core.c
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+++ b/drivers/mmc/core/core.c
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@@ -717,7 +717,7 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card)
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*/
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limit_us = 3000000;
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else
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- limit_us = 100000;
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+ limit_us = 200000;
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/*
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* SDHC cards always use these fixed values.
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diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
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2018-04-18 02:07:27 +00:00
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index baf3d5da4ccb..f7f1f4f0d2c9 100644
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2018-02-27 01:43:53 +00:00
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--- a/drivers/mmc/core/sd.c
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+++ b/drivers/mmc/core/sd.c
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2018-04-18 02:07:27 +00:00
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@@ -356,6 +356,15 @@ int mmc_sd_switch_hs(struct mmc_card *card)
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2018-02-27 01:43:53 +00:00
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if (!status)
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return -ENOMEM;
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+ /*
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+ * Some SDHC cards, notably those with a Sandisk SD controller
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+ * (also found in Kingston products) need a bit of slack
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+ * before successfully handling the SWITCH command. So far,
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+ * cards identifying themselves as "SD04G" and "SD08G" are
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+ * affected
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+ */
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+ udelay(100);
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+
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err = mmc_sd_switch(card, 1, 0, 1, status);
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if (err)
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goto out;
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diff --git a/drivers/mmc/host/mvsdio.c b/drivers/mmc/host/mvsdio.c
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index 210247b3d11a..05029d5bd72a 100644
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--- a/drivers/mmc/host/mvsdio.c
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+++ b/drivers/mmc/host/mvsdio.c
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@@ -23,6 +23,7 @@
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#include <linux/of_irq.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/slot-gpio.h>
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+#include <linux/mmc/sd.h>
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#include <asm/sizes.h>
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#include <asm/unaligned.h>
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@@ -149,6 +150,7 @@ static void mvsd_request(struct mmc_host *mmc, struct mmc_request *mrq)
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dev_dbg(host->dev, "cmd %d (hw state 0x%04x)\n",
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cmd->opcode, mvsd_read(MVSD_HW_STATE));
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+ if (cmd->opcode == SD_SWITCH) mdelay(1); /* Voodoo */
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cmdreg = MVSD_CMD_INDEX(cmd->opcode);
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--
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2018-04-18 02:07:27 +00:00
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2.17.0
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2018-02-27 01:43:53 +00:00
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