From: Wan Zongshun <vincent....@amd.com>
AMD hs200 mode tuning mode is not compatible with standard tuning process,
so we need .platform_execute_tuning callback support in sdhci-pci-core.c,
this patch is to do:
1. Add platform_execute_tuning callback in sdhci_pci_slot.
2. Implement sdhci_pci_ops.platform_execute_tuning function.
Signed-off-by: Wan Zongshun <vincent....@amd.com>
---
Hi Ulf,
Though modifying sdhci_pci_ops to be not const that is easy to implement
my requirement, I am not sure it is right to do this.
So I just follow sdhci_pci_select_drive_strength style to add new callback:
sdhci_pci_platform_execute_tuning.
But I also met trouble in sdhci_execute_tuning of sdhci.c, I have to suppose
only sdhci_pci_platform_execute_tuning is returning -EPERM(current code,
my assumption is right), so that those vendor that has no
slot->platform_execute_tuning could be skipped and go next standard
tuning process.
If you have better idea for my requirement, please correct me.
Thanks!
Wan Zongshun.
---
drivers/mmc/host/sdhci-pci-core.c | 23 +++++++++++++++++++++++
drivers/mmc/host/sdhci-pci.h | 1 +
drivers/mmc/host/sdhci.c | 3 ++-
3 files changed, 26 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci-pci-core.c
b/drivers/mmc/host/sdhci-pci-core.c
index 01c5723..e7b2bbe 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -905,8 +905,19 @@ static int amd_probe(struct sdhci_pci_chip *chip)
return 0;
}
+static int amd_probe_slot(struct sdhci_pci_slot *slot)
+{
+ struct sdhci_host *host = slot->host;
+
+ if (host->quirks2 & SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD)
+ slot->platform_execute_tuning = amd_execute_tuning;
+
+ return 0;
+}
+
static const struct sdhci_pci_fixes sdhci_amd = {
.probe = amd_probe,
+ .probe_slot = amd_probe_slot,
};
static const struct pci_device_id pci_ids[] = {
@@ -1508,6 +1519,17 @@ static int sdhci_pci_select_drive_strength(struct
sdhci_host *host,
card_drv, drv_type);
}
+static int sdhci_pci_platform_execute_tuning(struct sdhci_host *host,
+ u32 opcode)
+{
+ struct sdhci_pci_slot *slot = sdhci_priv(host);
+
+ if (!slot->platform_execute_tuning)
+ return -EPERM;
+
+ return slot->platform_execute_tuning(host, opcode);
+}
+
static const struct sdhci_ops sdhci_pci_ops = {
.set_clock = sdhci_set_clock,
.enable_dma = sdhci_pci_enable_dma,
@@ -1516,6 +1538,7 @@ static const struct sdhci_ops sdhci_pci_ops = {
.set_uhs_signaling = sdhci_set_uhs_signaling,
.hw_reset = sdhci_pci_hw_reset,
.select_drive_strength = sdhci_pci_select_drive_strength,
+ .platform_execute_tuning = sdhci_pci_platform_execute_tuning,
};
/*****************************************************************************\
diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h
index d1a0b4d..48d98f1 100644
--- a/drivers/mmc/host/sdhci-pci.h
+++ b/drivers/mmc/host/sdhci-pci.h
@@ -83,6 +83,7 @@ struct sdhci_pci_slot {
struct mmc_card *card,
unsigned int max_dtr, int host_drv,
int card_drv, int *drv_type);
+ int (*platform_execute_tuning)(struct sdhci_host *host, u32 opcode);
};
struct sdhci_pci_chip {
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 2753b722d..2a5a6ce 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1937,7 +1937,8 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32
opcode)
spin_unlock_irqrestore(&host->lock, flags);
err = host->ops->platform_execute_tuning(host, opcode);
sdhci_runtime_pm_put(host);
- return err;
+ if (err != EPERM)
+ return err;
}
ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
--
1.9.1
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