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mmc: mmci: Add and implement a ->dma_setup() callback for qcom dml 

As a first step to improve the variant specific code for mmci, add a
->dma_setup() callback to the struct mmci_host_ops.

To show its use, let's deploy the callback for the qcom dml, which involves
also to the assign the mmci_host_ops pointer from the variant ->init()
callback.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Ludovic Barre <ludovic.barre@st.com>
This commit is contained in:
Ulf Hansson 2018-07-16 13:08:18 +02:00
parent ed9067fd5f
commit 29aba07aea
4 changed files with 21 additions and 12 deletions
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7
drivers/mmc/host/mmci.c
View File

@ -208,6 +208,7 @@ static struct variant_data variant_qcom = {
.mmcimask1 = true,
.start_err = MCI_STARTBITERR,
.opendrain = MCI_ROD,
.init = qcom_variant_init,
};
/* Busy detection for the ST Micro variant */
@ -417,7 +418,6 @@ static void mmci_init_sg(struct mmci_host *host, struct mmc_data *data)
static void mmci_dma_setup(struct mmci_host *host)
{
const char *rxname, *txname;
struct variant_data *variant = host->variant;
host->dma_rx_channel = dma_request_slave_channel(mmc_dev(host->mmc), "rx");
host->dma_tx_channel = dma_request_slave_channel(mmc_dev(host->mmc), "tx");
@ -465,9 +465,8 @@ static void mmci_dma_setup(struct mmci_host *host)
host->mmc->max_seg_size = max_seg_size;
}
if (variant->qcom_dml && host->dma_rx_channel && host->dma_tx_channel)
if (dml_hw_init(host, host->mmc->parent->of_node))
variant->qcom_dml = false;
if (host->ops && host->ops->dma_setup)
host->ops->dma_setup(host);
}
/*

1
drivers/mmc/host/mmci.h
View File

@ -273,6 +273,7 @@ struct variant_data {
/* mmci variant callbacks */
struct mmci_host_ops {
void (*dma_setup)(struct mmci_host *host);
};
struct mmci_host_next {

20
drivers/mmc/host/mmci_qcom_dml.c
View File

@ -119,17 +119,20 @@ static int of_get_dml_pipe_index(struct device_node *np, const char *name)
}
/* Initialize the dml hardware connected to SD Card controller */
int dml_hw_init(struct mmci_host *host, struct device_node *np)
static void qcom_dma_setup(struct mmci_host *host)
{
u32 config;
void __iomem *base;
int consumer_id, producer_id;
struct device_node *np = host->mmc->parent->of_node;
consumer_id = of_get_dml_pipe_index(np, "tx");
producer_id = of_get_dml_pipe_index(np, "rx");
if (producer_id < 0 || consumer_id < 0)
return -ENODEV;
if (producer_id < 0 || consumer_id < 0) {
host->variant->qcom_dml = false;
return;
}
base = host->base + DML_OFFSET;
@ -172,6 +175,13 @@ int dml_hw_init(struct mmci_host *host, struct device_node *np)
/* Make sure dml initialization is finished */
mb();
return 0;
}
static struct mmci_host_ops qcom_variant_ops = {
.dma_setup = qcom_dma_setup,
};
void qcom_variant_init(struct mmci_host *host)
{
host->ops = &qcom_variant_ops;
}

5
drivers/mmc/host/mmci_qcom_dml.h
View File

@ -16,12 +16,11 @@
#define __MMC_QCOM_DML_H__
#ifdef CONFIG_MMC_QCOM_DML
int dml_hw_init(struct mmci_host *host, struct device_node *np);
void qcom_variant_init(struct mmci_host *host);
void dml_start_xfer(struct mmci_host *host, struct mmc_data *data);
#else
static inline int dml_hw_init(struct mmci_host *host, struct device_node *np)
static inline void qcom_variant_init(struct mmci_host *host)
{
return -ENOSYS;
}
static inline void dml_start_xfer(struct mmci_host *host, struct mmc_data *data)
{