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-rw-r--r--drivers/memstick/core/memstick.c2
-rw-r--r--drivers/mmc/core/block.c14
-rw-r--r--drivers/mmc/core/bus.c4
-rw-r--r--drivers/mmc/core/bus.h2
-rw-r--r--drivers/mmc/core/host.c5
-rw-r--r--drivers/mmc/core/mmc.c2
-rw-r--r--drivers/mmc/core/queue.c2
-rw-r--r--drivers/mmc/core/sd.c2
-rw-r--r--drivers/mmc/core/sd.h2
-rw-r--r--drivers/mmc/core/sdio.c2
-rw-r--r--drivers/mmc/core/sdio_bus.c2
-rw-r--r--drivers/mmc/host/davinci_mmc.c59
-rw-r--r--drivers/mmc/host/meson-mx-sdhc-clkc.c43
-rw-r--r--drivers/mmc/host/meson-mx-sdhc-mmc.c13
-rw-r--r--drivers/mmc/host/moxart-mmc.c90
-rw-r--r--drivers/mmc/host/mvsdio.c71
-rw-r--r--drivers/mmc/host/mxcmmc.c53
-rw-r--r--drivers/mmc/host/omap.c53
-rw-r--r--drivers/mmc/host/renesas_sdhi.h3
-rw-r--r--drivers/mmc/host/sdhci-esdhc-mcf.c12
-rw-r--r--drivers/mmc/host/sdhci-of-dwcmshc.c66
-rw-r--r--drivers/mmc/host/sh_mmcif.c114
-rw-r--r--drivers/mmc/host/wbsd.c2
23 files changed, 377 insertions, 241 deletions
diff --git a/drivers/memstick/core/memstick.c b/drivers/memstick/core/memstick.c
index bbfaf6536903..23fea51ecbdd 100644
--- a/drivers/memstick/core/memstick.c
+++ b/drivers/memstick/core/memstick.c
@@ -164,7 +164,7 @@ static struct attribute *memstick_dev_attrs[] = {
};
ATTRIBUTE_GROUPS(memstick_dev);
-static struct bus_type memstick_bus_type = {
+static const struct bus_type memstick_bus_type = {
.name = "memstick",
.dev_groups = memstick_dev_groups,
.match = memstick_bus_match,
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 32d49100dff5..bd165cef2bbc 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -144,7 +144,7 @@ struct mmc_blk_data {
static dev_t mmc_rpmb_devt;
/* Bus type for RPMB character devices */
-static struct bus_type mmc_rpmb_bus_type = {
+static const struct bus_type mmc_rpmb_bus_type = {
.name = "mmc_rpmb",
};
@@ -206,7 +206,7 @@ static void mmc_blk_kref_release(struct kref *ref)
int devidx;
devidx = mmc_get_devidx(md->disk);
- ida_simple_remove(&mmc_blk_ida, devidx);
+ ida_free(&mmc_blk_ida, devidx);
mutex_lock(&open_lock);
md->disk->private_data = NULL;
@@ -2467,7 +2467,7 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
bool cache_enabled = false;
bool fua_enabled = false;
- devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL);
+ devidx = ida_alloc_max(&mmc_blk_ida, max_devices - 1, GFP_KERNEL);
if (devidx < 0) {
/*
* We get -ENOSPC because there are no more any available
@@ -2577,7 +2577,7 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
err_kfree:
kfree(md);
out:
- ida_simple_remove(&mmc_blk_ida, devidx);
+ ida_free(&mmc_blk_ida, devidx);
return ERR_PTR(ret);
}
@@ -2703,7 +2703,7 @@ static void mmc_blk_rpmb_device_release(struct device *dev)
{
struct mmc_rpmb_data *rpmb = dev_get_drvdata(dev);
- ida_simple_remove(&mmc_rpmb_ida, rpmb->id);
+ ida_free(&mmc_rpmb_ida, rpmb->id);
kfree(rpmb);
}
@@ -2719,13 +2719,13 @@ static int mmc_blk_alloc_rpmb_part(struct mmc_card *card,
struct mmc_rpmb_data *rpmb;
/* This creates the minor number for the RPMB char device */
- devidx = ida_simple_get(&mmc_rpmb_ida, 0, max_devices, GFP_KERNEL);
+ devidx = ida_alloc_max(&mmc_rpmb_ida, max_devices - 1, GFP_KERNEL);
if (devidx < 0)
return devidx;
rpmb = kzalloc(sizeof(*rpmb), GFP_KERNEL);
if (!rpmb) {
- ida_simple_remove(&mmc_rpmb_ida, devidx);
+ ida_free(&mmc_rpmb_ida, devidx);
return -ENOMEM;
}
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 0af96548e7da..0ddaee0eae54 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -214,7 +214,7 @@ static const struct dev_pm_ops mmc_bus_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
};
-static struct bus_type mmc_bus_type = {
+static const struct bus_type mmc_bus_type = {
.name = "mmc",
.dev_groups = mmc_dev_groups,
.uevent = mmc_bus_uevent,
@@ -272,7 +272,7 @@ static void mmc_release_card(struct device *dev)
/*
* Allocate and initialise a new MMC card structure.
*/
-struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type)
+struct mmc_card *mmc_alloc_card(struct mmc_host *host, const struct device_type *type)
{
struct mmc_card *card;
diff --git a/drivers/mmc/core/bus.h b/drivers/mmc/core/bus.h
index 3996b191b68d..cfd0d02d3420 100644
--- a/drivers/mmc/core/bus.h
+++ b/drivers/mmc/core/bus.h
@@ -23,7 +23,7 @@ static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *a
static DEVICE_ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
struct mmc_card *mmc_alloc_card(struct mmc_host *host,
- struct device_type *type);
+ const struct device_type *type);
int mmc_add_card(struct mmc_card *card);
void mmc_remove_card(struct mmc_card *card);
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index cf396e8f34e9..7cc9a33d28ca 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -76,7 +76,7 @@ static void mmc_host_classdev_release(struct device *dev)
struct mmc_host *host = cls_dev_to_mmc_host(dev);
wakeup_source_unregister(host->ws);
if (of_alias_get_id(host->parent->of_node, "mmc") < 0)
- ida_simple_remove(&mmc_host_ida, host->index);
+ ida_free(&mmc_host_ida, host->index);
kfree(host);
}
@@ -538,7 +538,8 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
min_idx = mmc_first_nonreserved_index();
max_idx = 0;
- index = ida_simple_get(&mmc_host_ida, min_idx, max_idx, GFP_KERNEL);
+ index = ida_alloc_range(&mmc_host_ida, min_idx, max_idx - 1,
+ GFP_KERNEL);
if (index < 0) {
kfree(host);
return NULL;
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 58ed7193a3ca..5b2f7c285461 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -883,7 +883,7 @@ static struct attribute *mmc_std_attrs[] = {
};
ATTRIBUTE_GROUPS(mmc_std);
-static struct device_type mmc_type = {
+static const struct device_type mmc_type = {
.groups = mmc_std_groups,
};
diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c
index a0a2412f62a7..316415588a77 100644
--- a/drivers/mmc/core/queue.c
+++ b/drivers/mmc/core/queue.c
@@ -351,8 +351,6 @@ static void mmc_setup_queue(struct mmc_queue *mq, struct mmc_card *card)
if (mmc_can_erase(card))
mmc_queue_setup_discard(mq->queue, card);
- if (!mmc_dev(host)->dma_mask || !*mmc_dev(host)->dma_mask)
- blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_HIGH);
blk_queue_max_hw_sectors(mq->queue,
min(host->max_blk_count, host->max_req_size / 512));
if (host->can_dma_map_merge)
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index c3e554344c99..1c8148cdda50 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -805,7 +805,7 @@ static const struct attribute_group sd_std_group = {
};
__ATTRIBUTE_GROUPS(sd_std);
-struct device_type sd_type = {
+const struct device_type sd_type = {
.groups = sd_std_groups,
};
diff --git a/drivers/mmc/core/sd.h b/drivers/mmc/core/sd.h
index 1af5a038bae9..fe6dd46927a4 100644
--- a/drivers/mmc/core/sd.h
+++ b/drivers/mmc/core/sd.h
@@ -4,7 +4,7 @@
#include <linux/types.h>
-extern struct device_type sd_type;
+extern const struct device_type sd_type;
struct mmc_host;
struct mmc_card;
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 5914516df2f7..4fb247fde5c0 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -66,7 +66,7 @@ static struct attribute *sdio_std_attrs[] = {
};
ATTRIBUTE_GROUPS(sdio_std);
-static struct device_type sdio_type = {
+static const struct device_type sdio_type = {
.groups = sdio_std_groups,
};
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index 47a48e902a24..71d885fbc228 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -244,7 +244,7 @@ static const struct dev_pm_ops sdio_bus_pm_ops = {
)
};
-static struct bus_type sdio_bus_type = {
+static const struct bus_type sdio_bus_type = {
.name = "sdio",
.dev_groups = sdio_dev_groups,
.match = sdio_bus_match,
diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
index ee3b1a4e0848..8bd938919687 100644
--- a/drivers/mmc/host/davinci_mmc.c
+++ b/drivers/mmc/host/davinci_mmc.c
@@ -180,12 +180,6 @@ struct mmc_davinci_host {
#define DAVINCI_MMC_DATADIR_WRITE 2
unsigned char data_dir;
- /* buffer is used during PIO of one scatterlist segment, and
- * is updated along with buffer_bytes_left. bytes_left applies
- * to all N blocks of the PIO transfer.
- */
- u8 *buffer;
- u32 buffer_bytes_left;
u32 bytes_left;
struct dma_chan *dma_tx;
@@ -196,8 +190,8 @@ struct mmc_davinci_host {
bool active_request;
/* For PIO we walk scatterlists one segment at a time. */
+ struct sg_mapping_iter sg_miter;
unsigned int sg_len;
- struct scatterlist *sg;
/* Version of the MMC/SD controller */
u8 version;
@@ -213,30 +207,22 @@ struct mmc_davinci_host {
static irqreturn_t mmc_davinci_irq(int irq, void *dev_id);
/* PIO only */
-static void mmc_davinci_sg_to_buf(struct mmc_davinci_host *host)
-{
- host->buffer_bytes_left = sg_dma_len(host->sg);
- host->buffer = sg_virt(host->sg);
- if (host->buffer_bytes_left > host->bytes_left)
- host->buffer_bytes_left = host->bytes_left;
-}
-
static void davinci_fifo_data_trans(struct mmc_davinci_host *host,
unsigned int n)
{
+ struct sg_mapping_iter *sgm = &host->sg_miter;
u8 *p;
unsigned int i;
- if (host->buffer_bytes_left == 0) {
- host->sg = sg_next(host->data->sg);
- mmc_davinci_sg_to_buf(host);
+ /*
+ * By adjusting sgm->consumed this will give a pointer to the
+ * current index into the sgm.
+ */
+ if (!sg_miter_next(sgm)) {
+ dev_err(mmc_dev(host->mmc), "ran out of sglist prematurely\n");
+ return;
}
-
- p = host->buffer;
- if (n > host->buffer_bytes_left)
- n = host->buffer_bytes_left;
- host->buffer_bytes_left -= n;
- host->bytes_left -= n;
+ p = sgm->addr;
/* NOTE: we never transfer more than rw_threshold bytes
* to/from the fifo here; there's no I/O overlap.
@@ -261,7 +247,9 @@ static void davinci_fifo_data_trans(struct mmc_davinci_host *host,
p = p + (n & 3);
}
}
- host->buffer = p;
+
+ sgm->consumed = n;
+ host->bytes_left -= n;
}
static void mmc_davinci_start_command(struct mmc_davinci_host *host,
@@ -517,6 +505,7 @@ mmc_davinci_prepare_data(struct mmc_davinci_host *host, struct mmc_request *req)
int fifo_lev = (rw_threshold == 32) ? MMCFIFOCTL_FIFOLEV : 0;
int timeout;
struct mmc_data *data = req->data;
+ unsigned int flags = SG_MITER_ATOMIC; /* Used from IRQ */
if (host->version == MMC_CTLR_VERSION_2)
fifo_lev = (rw_threshold == 64) ? MMCFIFOCTL_FIFOLEV : 0;
@@ -545,12 +534,14 @@ mmc_davinci_prepare_data(struct mmc_davinci_host *host, struct mmc_request *req)
/* Configure the FIFO */
if (data->flags & MMC_DATA_WRITE) {
+ flags |= SG_MITER_FROM_SG;
host->data_dir = DAVINCI_MMC_DATADIR_WRITE;
writel(fifo_lev | MMCFIFOCTL_FIFODIR_WR | MMCFIFOCTL_FIFORST,
host->base + DAVINCI_MMCFIFOCTL);
writel(fifo_lev | MMCFIFOCTL_FIFODIR_WR,
host->base + DAVINCI_MMCFIFOCTL);
} else {
+ flags |= SG_MITER_TO_SG;
host->data_dir = DAVINCI_MMC_DATADIR_READ;
writel(fifo_lev | MMCFIFOCTL_FIFODIR_RD | MMCFIFOCTL_FIFORST,
host->base + DAVINCI_MMCFIFOCTL);
@@ -558,7 +549,6 @@ mmc_davinci_prepare_data(struct mmc_davinci_host *host, struct mmc_request *req)
host->base + DAVINCI_MMCFIFOCTL);
}
- host->buffer = NULL;
host->bytes_left = data->blocks * data->blksz;
/* For now we try to use DMA whenever we won't need partial FIFO
@@ -576,8 +566,7 @@ mmc_davinci_prepare_data(struct mmc_davinci_host *host, struct mmc_request *req)
} else {
/* Revert to CPU Copy */
host->sg_len = data->sg_len;
- host->sg = host->data->sg;
- mmc_davinci_sg_to_buf(host);
+ sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
}
}
@@ -843,6 +832,8 @@ davinci_abort_data(struct mmc_davinci_host *host, struct mmc_data *data)
{
mmc_davinci_reset_ctrl(host, 1);
mmc_davinci_reset_ctrl(host, 0);
+ if (!host->do_dma)
+ sg_miter_stop(&host->sg_miter);
}
static irqreturn_t mmc_davinci_sdio_irq(int irq, void *dev_id)
@@ -919,11 +910,13 @@ static irqreturn_t mmc_davinci_irq(int irq, void *dev_id)
if (qstatus & MMCST0_DATDNE) {
/* All blocks sent/received, and CRC checks passed */
if (data != NULL) {
- if ((host->do_dma == 0) && (host->bytes_left > 0)) {
- /* if datasize < rw_threshold
- * no RX ints are generated
- */
- davinci_fifo_data_trans(host, host->bytes_left);
+ if (!host->do_dma) {
+ if (host->bytes_left > 0)
+ /* if datasize < rw_threshold
+ * no RX ints are generated
+ */
+ davinci_fifo_data_trans(host, host->bytes_left);
+ sg_miter_stop(&host->sg_miter);
}
end_transfer = 1;
data->bytes_xfered = data->blocks * data->blksz;
diff --git a/drivers/mmc/host/meson-mx-sdhc-clkc.c b/drivers/mmc/host/meson-mx-sdhc-clkc.c
index 19200b7079a6..cbd17a596cd2 100644
--- a/drivers/mmc/host/meson-mx-sdhc-clkc.c
+++ b/drivers/mmc/host/meson-mx-sdhc-clkc.c
@@ -71,12 +71,23 @@ static int meson_mx_sdhc_clk_hw_register(struct device *dev,
static int meson_mx_sdhc_gate_clk_hw_register(struct device *dev,
const char *name_suffix,
struct clk_hw *parent,
- struct clk_hw *hw)
+ struct clk_hw *hw,
+ struct clk_bulk_data *clk_bulk_data,
+ u8 bulk_index)
{
struct clk_parent_data parent_data = { .hw = parent };
+ int ret;
+
+ ret = meson_mx_sdhc_clk_hw_register(dev, name_suffix, &parent_data, 1,
+ &clk_gate_ops, hw);
+ if (ret)
+ return ret;
+
+ clk_bulk_data[bulk_index].clk = devm_clk_hw_get_clk(dev, hw, name_suffix);
+ if (IS_ERR(clk_bulk_data[bulk_index].clk))
+ return PTR_ERR(clk_bulk_data[bulk_index].clk);
- return meson_mx_sdhc_clk_hw_register(dev, name_suffix, &parent_data, 1,
- &clk_gate_ops, hw);
+ return 0;
}
int meson_mx_sdhc_register_clkc(struct device *dev, void __iomem *base,
@@ -115,7 +126,8 @@ int meson_mx_sdhc_register_clkc(struct device *dev, void __iomem *base,
clkc_data->mod_clk_en.bit_idx = 15;
ret = meson_mx_sdhc_gate_clk_hw_register(dev, "mod_clk_on",
&clkc_data->div.hw,
- &clkc_data->mod_clk_en.hw);
+ &clkc_data->mod_clk_en.hw,
+ clk_bulk_data, 0);
if (ret)
return ret;
@@ -123,7 +135,8 @@ int meson_mx_sdhc_register_clkc(struct device *dev, void __iomem *base,
clkc_data->tx_clk_en.bit_idx = 14;
ret = meson_mx_sdhc_gate_clk_hw_register(dev, "tx_clk_on",
&clkc_data->div.hw,
- &clkc_data->tx_clk_en.hw);
+ &clkc_data->tx_clk_en.hw,
+ clk_bulk_data, 1);
if (ret)
return ret;
@@ -131,7 +144,8 @@ int meson_mx_sdhc_register_clkc(struct device *dev, void __iomem *base,
clkc_data->rx_clk_en.bit_idx = 13;
ret = meson_mx_sdhc_gate_clk_hw_register(dev, "rx_clk_on",
&clkc_data->div.hw,
- &clkc_data->rx_clk_en.hw);
+ &clkc_data->rx_clk_en.hw,
+ clk_bulk_data, 2);
if (ret)
return ret;
@@ -139,18 +153,7 @@ int meson_mx_sdhc_register_clkc(struct device *dev, void __iomem *base,
clkc_data->sd_clk_en.bit_idx = 12;
ret = meson_mx_sdhc_gate_clk_hw_register(dev, "sd_clk_on",
&clkc_data->div.hw,
- &clkc_data->sd_clk_en.hw);
- if (ret)
- return ret;
-
- /*
- * TODO: Replace clk_hw.clk with devm_clk_hw_get_clk() once that is
- * available.
- */
- clk_bulk_data[0].clk = clkc_data->mod_clk_en.hw.clk;
- clk_bulk_data[1].clk = clkc_data->sd_clk_en.hw.clk;
- clk_bulk_data[2].clk = clkc_data->tx_clk_en.hw.clk;
- clk_bulk_data[3].clk = clkc_data->rx_clk_en.hw.clk;
-
- return 0;
+ &clkc_data->sd_clk_en.hw,
+ clk_bulk_data, 3);
+ return ret;
}
diff --git a/drivers/mmc/host/meson-mx-sdhc-mmc.c b/drivers/mmc/host/meson-mx-sdhc-mmc.c
index 1ed9731e77ef..31f750301dc1 100644
--- a/drivers/mmc/host/meson-mx-sdhc-mmc.c
+++ b/drivers/mmc/host/meson-mx-sdhc-mmc.c
@@ -65,10 +65,8 @@ static const struct regmap_config meson_mx_sdhc_regmap_config = {
.max_register = MESON_SDHC_CLK2,
};
-static void meson_mx_sdhc_hw_reset(struct mmc_host *mmc)
+static void meson_mx_sdhc_reset(struct meson_mx_sdhc_host *host)
{
- struct meson_mx_sdhc_host *host = mmc_priv(mmc);
-
regmap_write(host->regmap, MESON_SDHC_SRST, MESON_SDHC_SRST_MAIN_CTRL |
MESON_SDHC_SRST_RXFIFO | MESON_SDHC_SRST_TXFIFO |
MESON_SDHC_SRST_DPHY_RX | MESON_SDHC_SRST_DPHY_TX |
@@ -116,7 +114,7 @@ static void meson_mx_sdhc_wait_cmd_ready(struct mmc_host *mmc)
dev_warn(mmc_dev(mmc),
"Failed to poll for CMD_BUSY while processing CMD%d\n",
host->cmd->opcode);
- meson_mx_sdhc_hw_reset(mmc);
+ meson_mx_sdhc_reset(host);
}
ret = regmap_read_poll_timeout(host->regmap, MESON_SDHC_ESTA, esta,
@@ -127,7 +125,7 @@ static void meson_mx_sdhc_wait_cmd_ready(struct mmc_host *mmc)
dev_warn(mmc_dev(mmc),
"Failed to poll for ESTA[13:11] while processing CMD%d\n",
host->cmd->opcode);
- meson_mx_sdhc_hw_reset(mmc);
+ meson_mx_sdhc_reset(host);
}
}
@@ -495,7 +493,6 @@ static int meson_mx_sdhc_execute_tuning(struct mmc_host *mmc, u32 opcode)
}
static const struct mmc_host_ops meson_mx_sdhc_ops = {
- .card_hw_reset = meson_mx_sdhc_hw_reset,
.request = meson_mx_sdhc_request,
.set_ios = meson_mx_sdhc_set_ios,
.card_busy = meson_mx_sdhc_card_busy,
@@ -618,7 +615,7 @@ static irqreturn_t meson_mx_sdhc_irq_thread(int irq, void *irq_data)
}
if (cmd->error == -EIO || cmd->error == -ETIMEDOUT)
- meson_mx_sdhc_hw_reset(host->mmc);
+ meson_mx_sdhc_reset(host);
else if (cmd->data)
/*
* Clear the FIFOs after completing data transfers to prevent
@@ -728,7 +725,7 @@ static void meson_mx_sdhc_init_hw(struct mmc_host *mmc)
{
struct meson_mx_sdhc_host *host = mmc_priv(mmc);
- meson_mx_sdhc_hw_reset(mmc);
+ meson_mx_sdhc_reset(host);
regmap_write(host->regmap, MESON_SDHC_CTRL,
FIELD_PREP(MESON_SDHC_CTRL_RX_PERIOD, 0xf) |
diff --git a/drivers/mmc/host/moxart-mmc.c b/drivers/mmc/host/moxart-mmc.c
index 5cfdd3a86e54..b88d6dec209f 100644
--- a/drivers/mmc/host/moxart-mmc.c
+++ b/drivers/mmc/host/moxart-mmc.c
@@ -131,12 +131,10 @@ struct moxart_host {
struct dma_async_tx_descriptor *tx_desc;
struct mmc_host *mmc;
struct mmc_request *mrq;
- struct scatterlist *cur_sg;
struct completion dma_complete;
struct completion pio_complete;
- u32 num_sg;
- u32 data_remain;
+ struct sg_mapping_iter sg_miter;
u32 data_len;
u32 fifo_width;
u32 timeout;
@@ -148,35 +146,6 @@ struct moxart_host {
bool is_removed;
};
-static inline void moxart_init_sg(struct moxart_host *host,
- struct mmc_data *data)
-{
- host->cur_sg = data->sg;
- host->num_sg = data->sg_len;
- host->data_remain = host->cur_sg->length;
-
- if (host->data_remain > host->data_len)
- host->data_remain = host->data_len;
-}
-
-static inline int moxart_next_sg(struct moxart_host *host)
-{
- int remain;
- struct mmc_data *data = host->mrq->cmd->data;
-
- host->cur_sg++;
- host->num_sg--;
-
- if (host->num_sg > 0) {
- host->data_remain = host->cur_sg->length;
- remain = host->data_len - data->bytes_xfered;
- if (remain > 0 && remain < host->data_remain)
- host->data_remain = remain;
- }
-
- return host->num_sg;
-}
-
static int moxart_wait_for_status(struct moxart_host *host,
u32 mask, u32 *status)
{
@@ -254,6 +223,11 @@ static void moxart_dma_complete(void *param)
complete(&host->dma_complete);
}
+static bool moxart_use_dma(struct moxart_host *host)
+{
+ return (host->data_len > host->fifo_width) && host->have_dma;
+}
+
static void moxart_transfer_dma(struct mmc_data *data, struct moxart_host *host)
{
u32 len, dir_slave;
@@ -291,11 +265,11 @@ static void moxart_transfer_dma(struct mmc_data *data, struct moxart_host *host)
dma_async_issue_pending(dma_chan);
}
- data->bytes_xfered += host->data_remain;
-
wait_for_completion_interruptible_timeout(&host->dma_complete,
host->timeout);
+ data->bytes_xfered = host->data_len;
+
dma_unmap_sg(dma_chan->device->dev,
data->sg, data->sg_len,
mmc_get_dma_dir(data));
@@ -304,14 +278,28 @@ static void moxart_transfer_dma(struct mmc_data *data, struct moxart_host *host)
static void moxart_transfer_pio(struct moxart_host *host)
{
+ struct sg_mapping_iter *sgm = &host->sg_miter;
struct mmc_data *data = host->mrq->cmd->data;
u32 *sgp, len = 0, remain, status;
if (host->data_len == data->bytes_xfered)
return;
- sgp = sg_virt(host->cur_sg);
- remain = host->data_remain;
+ /*
+ * By updating sgm->consumes this will get a proper pointer into the
+ * buffer at any time.
+ */
+ if (!sg_miter_next(sgm)) {
+ /* This shold not happen */
+ dev_err(mmc_dev(host->mmc), "ran out of scatterlist prematurely\n");
+ data->error = -EINVAL;
+ complete(&host->pio_complete);
+ return;
+ }
+ sgp = sgm->addr;
+ remain = sgm->length;
+ if (remain > host->data_len)
+ remain = host->data_len;
if (data->flags & MMC_DATA_WRITE) {
while (remain > 0) {
@@ -326,6 +314,7 @@ static void moxart_transfer_pio(struct moxart_host *host)
sgp++;
len += 4;
}
+ sgm->consumed += len;
remain -= len;
}
@@ -342,22 +331,22 @@ static void moxart_transfer_pio(struct moxart_host *host)
sgp++;
len += 4;
}
+ sgm->consumed += len;
remain -= len;
}
}
- data->bytes_xfered += host->data_remain - remain;
- host->data_remain = remain;
-
- if (host->data_len != data->bytes_xfered)
- moxart_next_sg(host);
- else
+ data->bytes_xfered += sgm->consumed;
+ if (host->data_len == data->bytes_xfered) {
complete(&host->pio_complete);
+ return;
+ }
}
static void moxart_prepare_data(struct moxart_host *host)
{
struct mmc_data *data = host->mrq->cmd->data;
+ unsigned int flags = SG_MITER_ATOMIC; /* Used from IRQ */
u32 datactrl;
int blksz_bits;
@@ -368,15 +357,19 @@ static void moxart_prepare_data(struct moxart_host *host)
blksz_bits = ffs(data->blksz) - 1;
BUG_ON(1 << blksz_bits != data->blksz);
- moxart_init_sg(host, data);
-
datactrl = DCR_DATA_EN | (blksz_bits & DCR_BLK_SIZE);
- if (data->flags & MMC_DATA_WRITE)
+ if (data->flags & MMC_DATA_WRITE) {
+ flags |= SG_MITER_FROM_SG;
datactrl |= DCR_DATA_WRITE;
+ } else {
+ flags |= SG_MITER_TO_SG;
+ }
- if ((host->data_len > host->fifo_width) && host->have_dma)
+ if (moxart_use_dma(host))
datactrl |= DCR_DMA_EN;
+ else
+ sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
writel(DCR_DATA_FIFO_RESET, host->base + REG_DATA_CONTROL);
writel(MASK_DATA | FIFO_URUN | FIFO_ORUN, host->base + REG_CLEAR);
@@ -407,7 +400,7 @@ static void moxart_request(struct mmc_host *mmc, struct mmc_request *mrq)
moxart_send_command(host, host->mrq->cmd);
if (mrq->cmd->data) {
- if ((host->data_len > host->fifo_width) && host->have_dma) {
+ if (moxart_use_dma(host)) {
writel(CARD_CHANGE, host->base + REG_INTERRUPT_MASK);
@@ -449,6 +442,9 @@ static void moxart_request(struct mmc_host *mmc, struct mmc_request *mrq)
}
request_done:
+ if (!moxart_use_dma(host))
+ sg_miter_stop(&host->sg_miter);
+
spin_unlock_irqrestore(&host->lock, flags);
mmc_request_done(host->mmc, mrq);
}
diff --git a/drivers/mmc/host/mvsdio.c b/drivers/mmc/host/mvsdio.c
index ca01b7d204ba..af7f21888e27 100644
--- a/drivers/mmc/host/mvsdio.c
+++ b/drivers/mmc/host/mvsdio.c
@@ -38,8 +38,9 @@ struct mvsd_host {
unsigned int xfer_mode;
unsigned int intr_en;
unsigned int ctrl;
+ bool use_pio;
+ struct sg_mapping_iter sg_miter;
unsigned int pio_size;
- void *pio_ptr;
unsigned int sg_frags;
unsigned int ns_per_clk;
unsigned int clock;
@@ -114,11 +115,18 @@ static int mvsd_setup_data(struct mvsd_host *host, struct mmc_data *data)
* data when the buffer is not aligned on a 64 byte
* boundary.
*/
+ unsigned int miter_flags = SG_MITER_ATOMIC; /* Used from IRQ */
+
+ if (data->flags & MMC_DATA_READ)
+ miter_flags |= SG_MITER_TO_SG;
+ else
+ miter_flags |= SG_MITER_FROM_SG;
+
host->pio_size = data->blocks * data->blksz;
- host->pio_ptr = sg_virt(data->sg);
+ sg_miter_start(&host->sg_miter, data->sg, data->sg_len, miter_flags);
if (!nodma)
- dev_dbg(host->dev, "fallback to PIO for data at 0x%p size %d\n",
- host->pio_ptr, host->pio_size);
+ dev_dbg(host->dev, "fallback to PIO for data\n");
+ host->use_pio = true;
return 1;
} else {
dma_addr_t phys_addr;
@@ -129,6 +137,7 @@ static int mvsd_setup_data(struct mvsd_host *host, struct mmc_data *data)
phys_addr = sg_dma_address(data->sg);
mvsd_write(MVSD_SYS_ADDR_LOW, (u32)phys_addr & 0xffff);
mvsd_write(MVSD_SYS_ADDR_HI, (u32)phys_addr >> 16);
+ host->use_pio = false;
return 0;
}
}
@@ -288,8 +297,8 @@ static u32 mvsd_finish_data(struct mvsd_host *host, struct mmc_data *data,
{
void __iomem *iobase = host->base;
- if (host->pio_ptr) {
- host->pio_ptr = NULL;
+ if (host->use_pio) {
+ sg_miter_stop(&host->sg_miter);
host->pio_size = 0;
} else {
dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_frags,
@@ -344,9 +353,12 @@ static u32 mvsd_finish_data(struct mvsd_host *host, struct mmc_data *data,
static irqreturn_t mvsd_irq(int irq, void *dev)
{
struct mvsd_host *host = dev;
+ struct sg_mapping_iter *sgm = &host->sg_miter;
void __iomem *iobase = host->base;
u32 intr_status, intr_done_mask;
int irq_handled = 0;
+ u16 *p;
+ int s;
intr_status = mvsd_read(MVSD_NOR_INTR_STATUS);
dev_dbg(host->dev, "intr 0x%04x intr_en 0x%04x hw_state 0x%04x\n",
@@ -370,15 +382,36 @@ static irqreturn_t mvsd_irq(int irq, void *dev)
spin_lock(&host->lock);
/* PIO handling, if needed. Messy business... */
- if (host->pio_size &&
+ if (host->use_pio) {
+ /*
+ * As we set sgm->consumed this always gives a valid buffer
+ * position.
+ */
+ if (!sg_miter_next(sgm)) {
+ /* This should not happen */
+ dev_err(host->dev, "ran out of scatter segments\n");
+ spin_unlock(&host->lock);
+ host->intr_en &=
+ ~(MVSD_NOR_RX_READY | MVSD_NOR_RX_FIFO_8W |
+ MVSD_NOR_TX_AVAIL | MVSD_NOR_TX_FIFO_8W);
+ mvsd_write(MVSD_NOR_INTR_EN, host->intr_en);
+ return IRQ_HANDLED;
+ }
+ p = sgm->addr;
+ s = sgm->length;
+ if (s > host->pio_size)
+ s = host->pio_size;
+ }
+
+ if (host->use_pio &&
(intr_status & host->intr_en &
(MVSD_NOR_RX_READY | MVSD_NOR_RX_FIFO_8W))) {
- u16 *p = host->pio_ptr;
- int s = host->pio_size;
+
while (s >= 32 && (intr_status & MVSD_NOR_RX_FIFO_8W)) {
readsw(iobase + MVSD_FIFO, p, 16);
p += 16;
s -= 32;
+ sgm->consumed += 32;
intr_status = mvsd_read(MVSD_NOR_INTR_STATUS);
}
/*
@@ -391,6 +424,7 @@ static irqreturn_t mvsd_irq(int irq, void *dev)
put_unaligned(mvsd_read(MVSD_FIFO), p++);
put_unaligned(mvsd_read(MVSD_FIFO), p++);
s -= 4;
+ sgm->consumed += 4;
intr_status = mvsd_read(MVSD_NOR_INTR_STATUS);
}
if (s && s < 4 && (intr_status & MVSD_NOR_RX_READY)) {
@@ -398,10 +432,13 @@ static irqreturn_t mvsd_irq(int irq, void *dev)
val[0] = mvsd_read(MVSD_FIFO);
val[1] = mvsd_read(MVSD_FIFO);
memcpy(p, ((void *)&val) + 4 - s, s);
+ sgm->consumed += s;
s = 0;
intr_status = mvsd_read(MVSD_NOR_INTR_STATUS);
}
- if (s == 0) {
+ /* PIO transfer done */
+ host->pio_size -= sgm->consumed;
+ if (host->pio_size == 0) {
host->intr_en &=
~(MVSD_NOR_RX_READY | MVSD_NOR_RX_FIFO_8W);
mvsd_write(MVSD_NOR_INTR_EN, host->intr_en);
@@ -413,14 +450,10 @@ static irqreturn_t mvsd_irq(int irq, void *dev)
}
dev_dbg(host->dev, "pio %d intr 0x%04x hw_state 0x%04x\n",
s, intr_status, mvsd_read(MVSD_HW_STATE));
- host->pio_ptr = p;
- host->pio_size = s;
irq_handled = 1;
- } else if (host->pio_size &&
+ } else if (host->use_pio &&
(intr_status & host->intr_en &
(MVSD_NOR_TX_AVAIL | MVSD_NOR_TX_FIFO_8W))) {
- u16 *p = host->pio_ptr;
- int s = host->pio_size;
/*
* The TX_FIFO_8W bit is unreliable. When set, bursting
* 16 halfwords all at once in the FIFO drops data. Actually
@@ -431,6 +464,7 @@ static irqreturn_t mvsd_irq(int irq, void *dev)
mvsd_write(MVSD_FIFO, get_unaligned(p++));
mvsd_write(MVSD_FIFO, get_unaligned(p++));
s -= 4;
+ sgm->consumed += 4;
intr_status = mvsd_read(MVSD_NOR_INTR_STATUS);
}
if (s < 4) {
@@ -439,10 +473,13 @@ static irqreturn_t mvsd_irq(int irq, void *dev)
memcpy(((void *)&val) + 4 - s, p, s);
mvsd_write(MVSD_FIFO, val[0]);
mvsd_write(MVSD_FIFO, val[1]);
+ sgm->consumed += s;
s = 0;
intr_status = mvsd_read(MVSD_NOR_INTR_STATUS);
}
- if (s == 0) {
+ /* PIO transfer done */
+ host->pio_size -= sgm->consumed;
+ if (host->pio_size == 0) {
host->intr_en &=
~(MVSD_NOR_TX_AVAIL | MVSD_NOR_TX_FIFO_8W);
mvsd_write(MVSD_NOR_INTR_EN, host->intr_en);
@@ -450,8 +487,6 @@ static irqreturn_t mvsd_irq(int irq, void *dev)
}
dev_dbg(host->dev, "pio %d intr 0x%04x hw_state 0x%04x\n",
s, intr_status, mvsd_read(MVSD_HW_STATE));
- host->pio_ptr = p;
- host->pio_size = s;
irq_handled = 1;
}
diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index 5b3ab0e20505..1edf65291354 100644
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c
@@ -266,11 +266,18 @@ static inline void buffer_swap32(u32 *buf, int len)
static void mxcmci_swap_buffers(struct mmc_data *data)
{
- struct scatterlist *sg;
- int i;
+ struct sg_mapping_iter sgm;
+ u32 *buf;
+
+ sg_miter_start(&sgm, data->sg, data->sg_len,
+ SG_MITER_TO_SG | SG_MITER_FROM_SG);
+
+ while (sg_miter_next(&sgm)) {
+ buf = sgm.addr;
+ buffer_swap32(buf, sgm.length);
+ }
- for_each_sg(data->sg, sg, data->sg_len, i)
- buffer_swap32(sg_virt(sg), sg->length);
+ sg_miter_stop(&sgm);
}
#else
static inline void mxcmci_swap_buffers(struct mmc_data *data) {}
@@ -526,10 +533,9 @@ static int mxcmci_poll_status(struct mxcmci_host *host, u32 mask)
} while (1);
}
-static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes)
+static int mxcmci_pull(struct mxcmci_host *host, u32 *buf, int bytes)
{
unsigned int stat;
- u32 *buf = _buf;
while (bytes > 3) {
stat = mxcmci_poll_status(host,
@@ -555,10 +561,9 @@ static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes)
return 0;
}
-static int mxcmci_push(struct mxcmci_host *host, void *_buf, int bytes)
+static int mxcmci_push(struct mxcmci_host *host, u32 *buf, int bytes)
{
unsigned int stat;
- u32 *buf = _buf;
while (bytes > 3) {
stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY);
@@ -586,31 +591,39 @@ static int mxcmci_push(struct mxcmci_host *host, void *_buf, int bytes)
static int mxcmci_transfer_data(struct mxcmci_host *host)
{
struct mmc_data *data = host->req->data;
- struct scatterlist *sg;
- int stat, i;
+ struct sg_mapping_iter sgm;
+ int stat;
+ u32 *buf;
host->data = data;
host->datasize = 0;
+ sg_miter_start(&sgm, data->sg, data->sg_len,
+ (data->flags & MMC_DATA_READ) ? SG_MITER_TO_SG : SG_MITER_FROM_SG);
if (data->flags & MMC_DATA_READ) {
- for_each_sg(data->sg, sg, data->sg_len, i) {
- stat = mxcmci_pull(host, sg_virt(sg), sg->length);
+ while (sg_miter_next(&sgm)) {
+ buf = sgm.addr;
+ stat = mxcmci_pull(host, buf, sgm.length);
if (stat)
- return stat;
- host->datasize += sg->length;
+ goto transfer_error;
+ host->datasize += sgm.length;
}
} else {
- for_each_sg(data->sg, sg, data->sg_len, i) {
- stat = mxcmci_push(host, sg_virt(sg), sg->length);
+ while (sg_miter_next(&sgm)) {
+ buf = sgm.addr;
+ stat = mxcmci_push(host, buf, sgm.length);
if (stat)
- return stat;
- host->datasize += sg->length;
+ goto transfer_error;
+ host->datasize += sgm.length;
}
stat = mxcmci_poll_status(host, STATUS_WRITE_OP_DONE);
if (stat)
- return stat;
+ goto transfer_error;
}
- return 0;
+
+transfer_error:
+ sg_miter_stop(&sgm);
+ return stat;
}
static void mxcmci_datawork(struct work_struct *work)
diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index 9fb8995b43a1..088f8ed4fdc4 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -148,10 +148,8 @@ struct mmc_omap_host {
struct work_struct send_stop_work;
struct mmc_data *stop_data;
+ struct sg_mapping_iter sg_miter;
unsigned int sg_len;
- int sg_idx;
- u16 * buffer;
- u32 buffer_bytes_left;
u32 total_bytes_left;
unsigned features;
@@ -456,6 +454,8 @@ mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
{
if (host->dma_in_use)
mmc_omap_release_dma(host, data, data->error);
+ else
+ sg_miter_stop(&host->sg_miter);
host->data = NULL;
host->sg_len = 0;
@@ -651,19 +651,6 @@ mmc_omap_cmd_timer(struct timer_list *t)
spin_unlock_irqrestore(&host->slot_lock, flags);
}
-/* PIO only */
-static void
-mmc_omap_sg_to_buf(struct mmc_omap_host *host)
-{
- struct scatterlist *sg;
-
- sg = host->data->sg + host->sg_idx;
- host->buffer_bytes_left = sg->length;
- host->buffer = sg_virt(sg);
- if (host->buffer_bytes_left > host->total_bytes_left)
- host->buffer_bytes_left = host->total_bytes_left;
-}
-
static void
mmc_omap_clk_timer(struct timer_list *t)
{
@@ -676,33 +663,37 @@ mmc_omap_clk_timer(struct timer_list *t)
static void
mmc_omap_xfer_data(struct mmc_omap_host *host, int write)
{
+ struct sg_mapping_iter *sgm = &host->sg_miter;
int n, nwords;
+ u16 *buffer;
- if (host->buffer_bytes_left == 0) {
- host->sg_idx++;
- BUG_ON(host->sg_idx == host->sg_len);
- mmc_omap_sg_to_buf(host);
+ if (!sg_miter_next(sgm)) {
+ /* This should not happen */
+ dev_err(mmc_dev(host->mmc), "ran out of scatterlist prematurely\n");
+ return;
}
+ buffer = sgm->addr;
+
n = 64;
- if (n > host->buffer_bytes_left)
- n = host->buffer_bytes_left;
+ if (n > sgm->length)
+ n = sgm->length;
+ if (n > host->total_bytes_left)
+ n = host->total_bytes_left;
/* Round up to handle odd number of bytes to transfer */
nwords = DIV_ROUND_UP(n, 2);
- host->buffer_bytes_left -= n;
+ sgm->consumed = n;
host->total_bytes_left -= n;
host->data->bytes_xfered += n;
if (write) {
__raw_writesw(host->virt_base + OMAP_MMC_REG(host, DATA),
- host->buffer, nwords);
+ buffer, nwords);
} else {
__raw_readsw(host->virt_base + OMAP_MMC_REG(host, DATA),
- host->buffer, nwords);
+ buffer, nwords);
}
-
- host->buffer += nwords;
}
#ifdef CONFIG_MMC_DEBUG
@@ -956,6 +947,7 @@ static inline void set_data_timeout(struct mmc_omap_host *host, struct mmc_reque
static void
mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
{
+ unsigned int miter_flags = SG_MITER_ATOMIC; /* Used from IRQ */
struct mmc_data *data = req->data;
int i, use_dma = 1, block_size;
struct scatterlist *sg;
@@ -990,7 +982,6 @@ mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
}
}
- host->sg_idx = 0;
if (use_dma) {
enum dma_data_direction dma_data_dir;
struct dma_async_tx_descriptor *tx;
@@ -1071,7 +1062,11 @@ mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
OMAP_MMC_WRITE(host, BUF, 0x1f1f);
host->total_bytes_left = data->blocks * block_size;
host->sg_len = sg_len;
- mmc_omap_sg_to_buf(host);
+ if (data->flags & MMC_DATA_READ)
+ miter_flags |= SG_MITER_TO_SG;
+ else
+ miter_flags |= SG_MITER_FROM_SG;
+ sg_miter_start(&host->sg_miter, data->sg, data->sg_len, miter_flags);
host->dma_in_use = 0;
}
diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h
index c1fb9740eab0..586f94d4dbfd 100644
--- a/drivers/mmc/host/renesas_sdhi.h
+++ b/drivers/mmc/host/renesas_sdhi.h
@@ -9,6 +9,7 @@
#ifndef RENESAS_SDHI_H
#define RENESAS_SDHI_H
+#include <linux/dmaengine.h>
#include <linux/platform_device.h>
#include "tmio_mmc.h"
@@ -63,7 +64,7 @@ struct renesas_sdhi_of_data_with_quirks {
struct renesas_sdhi_dma {
unsigned long end_flags;
enum dma_slave_buswidth dma_buswidth;
- bool (*filter)(struct dma_chan *chan, void *arg);
+ dma_filter_fn filter;
void (*enable)(struct tmio_mmc_host *host, bool enable);
struct completion dma_dataend;
struct tasklet_struct dma_complete;
diff --git a/drivers/mmc/host/sdhci-esdhc-mcf.c b/drivers/mmc/host/sdhci-esdhc-mcf.c
index a07f8333cd6b..c97363e2d86c 100644
--- a/drivers/mmc/host/sdhci-esdhc-mcf.c
+++ b/drivers/mmc/host/sdhci-esdhc-mcf.c
@@ -299,9 +299,8 @@ static void esdhc_mcf_pltfm_set_bus_width(struct sdhci_host *host, int width)
static void esdhc_mcf_request_done(struct sdhci_host *host,
struct mmc_request *mrq)
{
- struct scatterlist *sg;
+ struct sg_mapping_iter sgm;
u32 *buffer;
- int i;
if (!mrq->data || !mrq->data->bytes_xfered)
goto exit_done;
@@ -313,10 +312,13 @@ static void esdhc_mcf_request_done(struct sdhci_host *host,
* On mcf5441x there is no hw sdma option/flag to select the dma
* transfer endiannes. A swap after the transfer is needed.
*/
- for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) {
- buffer = (u32 *)sg_virt(sg);
- esdhc_mcf_buffer_swap32(buffer, sg->length);
+ sg_miter_start(&sgm, mrq->data->sg, mrq->data->sg_len,
+ SG_MITER_ATOMIC | SG_MITER_TO_SG | SG_MITER_FROM_SG);
+ while (sg_miter_next(&sgm)) {
+ buffer = sgm.addr;
+ esdhc_mcf_buffer_swap32(buffer, sgm.length);
}
+ sg_miter_stop(&sgm);
exit_done:
mmc_request_done(host->mmc, mrq);
diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
index a1f57af6acfb..ab4b964d4058 100644
--- a/drivers/mmc/host/sdhci-of-dwcmshc.c
+++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
@@ -52,6 +52,20 @@
#define AT_CTRL_SWIN_TH_VAL_MASK GENMASK(31, 24) /* bits [31:24] */
#define AT_CTRL_SWIN_TH_VAL 0x9 /* sampling window threshold */
+/* Sophgo CV18XX specific Registers */
+#define CV18XX_SDHCI_MSHC_CTRL 0x00
+#define CV18XX_EMMC_FUNC_EN BIT(0)
+#define CV18XX_LATANCY_1T BIT(1)
+#define CV18XX_SDHCI_PHY_TX_RX_DLY 0x40
+#define CV18XX_PHY_TX_DLY_MSK GENMASK(6, 0)
+#define CV18XX_PHY_TX_SRC_MSK GENMASK(9, 8)
+#define CV18XX_PHY_TX_SRC_INVERT_CLK_TX 0x1
+#define CV18XX_PHY_RX_DLY_MSK GENMASK(22, 16)
+#define CV18XX_PHY_RX_SRC_MSK GENMASK(25, 24)
+#define CV18XX_PHY_RX_SRC_INVERT_RX_CLK 0x1
+#define CV18XX_SDHCI_PHY_CONFIG 0x4c
+#define CV18XX_PHY_TX_BPS BIT(0)
+
/* Rockchip specific Registers */
#define DWCMSHC_EMMC_DLL_CTRL 0x800
#define DWCMSHC_EMMC_DLL_RXCLK 0x804
@@ -642,6 +656,35 @@ static void th1520_sdhci_reset(struct sdhci_host *host, u8 mask)
}
}
+static void cv18xx_sdhci_reset(struct sdhci_host *host, u8 mask)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
+ u32 val, emmc_caps = MMC_CAP2_NO_SD | MMC_CAP2_NO_SDIO;
+
+ sdhci_reset(host, mask);
+
+ if ((host->mmc->caps2 & emmc_caps) == emmc_caps) {
+ val = sdhci_readl(host, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
+ val |= CV18XX_EMMC_FUNC_EN;
+ sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
+ }
+
+ val = sdhci_readl(host, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
+ val |= CV18XX_LATANCY_1T;
+ sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
+
+ val = sdhci_readl(host, priv->vendor_specific_area1 + CV18XX_SDHCI_PHY_CONFIG);
+ val |= CV18XX_PHY_TX_BPS;
+ sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_PHY_CONFIG);
+
+ val = (FIELD_PREP(CV18XX_PHY_TX_DLY_MSK, 0) |
+ FIELD_PREP(CV18XX_PHY_TX_SRC_MSK, CV18XX_PHY_TX_SRC_INVERT_CLK_TX) |
+ FIELD_PREP(CV18XX_PHY_RX_DLY_MSK, 0) |
+ FIELD_PREP(CV18XX_PHY_RX_SRC_MSK, CV18XX_PHY_RX_SRC_INVERT_RX_CLK));
+ sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_PHY_TX_RX_DLY);
+}
+
static const struct sdhci_ops sdhci_dwcmshc_ops = {
.set_clock = sdhci_set_clock,
.set_bus_width = sdhci_set_bus_width,
@@ -671,6 +714,15 @@ static const struct sdhci_ops sdhci_dwcmshc_th1520_ops = {
.platform_execute_tuning = &th1520_execute_tuning,
};
+static const struct sdhci_ops sdhci_dwcmshc_cv18xx_ops = {
+ .set_clock = sdhci_set_clock,
+ .set_bus_width = sdhci_set_bus_width,
+ .set_uhs_signaling = dwcmshc_set_uhs_signaling,
+ .get_max_clock = dwcmshc_get_max_clock,
+ .reset = cv18xx_sdhci_reset,
+ .adma_write_desc = dwcmshc_adma_write_desc,
+};
+
static const struct sdhci_pltfm_data sdhci_dwcmshc_pdata = {
.ops = &sdhci_dwcmshc_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
@@ -700,6 +752,12 @@ static const struct sdhci_pltfm_data sdhci_dwcmshc_th1520_pdata = {
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
};
+static const struct sdhci_pltfm_data sdhci_dwcmshc_cv18xx_pdata = {
+ .ops = &sdhci_dwcmshc_cv18xx_ops,
+ .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
+};
+
static int dwcmshc_rk35xx_init(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
{
int err;
@@ -769,6 +827,14 @@ static const struct of_device_id sdhci_dwcmshc_dt_ids[] = {
.data = &sdhci_dwcmshc_pdata,
},
{
+ .compatible = "sophgo,cv1800b-dwcmshc",
+ .data = &sdhci_dwcmshc_cv18xx_pdata,
+ },
+ {
+ .compatible = "sophgo,sg2002-dwcmshc",
+ .data = &sdhci_dwcmshc_cv18xx_pdata,
+ },
+ {
.compatible = "thead,th1520-dwcmshc",
.data = &sdhci_dwcmshc_th1520_pdata,
},
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 077d711e964e..08b4312af94e 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -227,14 +227,12 @@ struct sh_mmcif_host {
bool dying;
long timeout;
void __iomem *addr;
- u32 *pio_ptr;
spinlock_t lock; /* protect sh_mmcif_host::state */
enum sh_mmcif_state state;
enum sh_mmcif_wait_for wait_for;
struct delayed_work timeout_work;
size_t blocksize;
- int sg_idx;
- int sg_blkidx;
+ struct sg_mapping_iter sg_miter;
bool power;
bool ccs_enable; /* Command Completion Signal support */
bool clk_ctrl2_enable;
@@ -600,32 +598,17 @@ static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
return ret;
}
-static bool sh_mmcif_next_block(struct sh_mmcif_host *host, u32 *p)
-{
- struct mmc_data *data = host->mrq->data;
-
- host->sg_blkidx += host->blocksize;
-
- /* data->sg->length must be a multiple of host->blocksize? */
- BUG_ON(host->sg_blkidx > data->sg->length);
-
- if (host->sg_blkidx == data->sg->length) {
- host->sg_blkidx = 0;
- if (++host->sg_idx < data->sg_len)
- host->pio_ptr = sg_virt(++data->sg);
- } else {
- host->pio_ptr = p;
- }
-
- return host->sg_idx != data->sg_len;
-}
-
static void sh_mmcif_single_read(struct sh_mmcif_host *host,
struct mmc_request *mrq)
{
+ struct mmc_data *data = mrq->data;
+
host->blocksize = (sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET) &
BLOCK_SIZE_MASK) + 3;
+ sg_miter_start(&host->sg_miter, data->sg, data->sg_len,
+ SG_MITER_TO_SG);
+
host->wait_for = MMCIF_WAIT_FOR_READ;
/* buf read enable */
@@ -634,20 +617,32 @@ static void sh_mmcif_single_read(struct sh_mmcif_host *host,
static bool sh_mmcif_read_block(struct sh_mmcif_host *host)
{
+ struct sg_mapping_iter *sgm = &host->sg_miter;
struct device *dev = sh_mmcif_host_to_dev(host);
struct mmc_data *data = host->mrq->data;
- u32 *p = sg_virt(data->sg);
+ u32 *p;
int i;
if (host->sd_error) {
+ sg_miter_stop(sgm);
data->error = sh_mmcif_error_manage(host);
dev_dbg(dev, "%s(): %d\n", __func__, data->error);
return false;
}
+ if (!sg_miter_next(sgm)) {
+ /* This should not happen on single blocks */
+ sg_miter_stop(sgm);
+ return false;
+ }
+
+ p = sgm->addr;
+
for (i = 0; i < host->blocksize / 4; i++)
*p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA);
+ sg_miter_stop(&host->sg_miter);
+
/* buffer read end */
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
host->wait_for = MMCIF_WAIT_FOR_READ_END;
@@ -658,6 +653,7 @@ static bool sh_mmcif_read_block(struct sh_mmcif_host *host)
static void sh_mmcif_multi_read(struct sh_mmcif_host *host,
struct mmc_request *mrq)
{
+ struct sg_mapping_iter *sgm = &host->sg_miter;
struct mmc_data *data = mrq->data;
if (!data->sg_len || !data->sg->length)
@@ -666,46 +662,63 @@ static void sh_mmcif_multi_read(struct sh_mmcif_host *host,
host->blocksize = sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET) &
BLOCK_SIZE_MASK;
+ sg_miter_start(sgm, data->sg, data->sg_len,
+ SG_MITER_TO_SG);
+
+ /* Advance to the first sglist entry */
+ if (!sg_miter_next(sgm)) {
+ sg_miter_stop(sgm);
+ return;
+ }
+
host->wait_for = MMCIF_WAIT_FOR_MREAD;
- host->sg_idx = 0;
- host->sg_blkidx = 0;
- host->pio_ptr = sg_virt(data->sg);
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
}
static bool sh_mmcif_mread_block(struct sh_mmcif_host *host)
{
+ struct sg_mapping_iter *sgm = &host->sg_miter;
struct device *dev = sh_mmcif_host_to_dev(host);
struct mmc_data *data = host->mrq->data;
- u32 *p = host->pio_ptr;
+ u32 *p;
int i;
if (host->sd_error) {
+ sg_miter_stop(sgm);
data->error = sh_mmcif_error_manage(host);
dev_dbg(dev, "%s(): %d\n", __func__, data->error);
return false;
}
- BUG_ON(!data->sg->length);
+ p = sgm->addr;
for (i = 0; i < host->blocksize / 4; i++)
*p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA);
- if (!sh_mmcif_next_block(host, p))
- return false;
+ sgm->consumed = host->blocksize;
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
+ if (!sg_miter_next(sgm)) {
+ sg_miter_stop(sgm);
+ return false;
+ }
+
return true;
}
static void sh_mmcif_single_write(struct sh_mmcif_host *host,
struct mmc_request *mrq)
{
+ struct mmc_data *data = mrq->data;
+
host->blocksize = (sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET) &
BLOCK_SIZE_MASK) + 3;
+ sg_miter_start(&host->sg_miter, data->sg, data->sg_len,
+ SG_MITER_FROM_SG);
+
host->wait_for = MMCIF_WAIT_FOR_WRITE;
/* buf write enable */
@@ -714,20 +727,32 @@ static void sh_mmcif_single_write(struct sh_mmcif_host *host,
static bool sh_mmcif_write_block(struct sh_mmcif_host *host)
{
+ struct sg_mapping_iter *sgm = &host->sg_miter;
struct device *dev = sh_mmcif_host_to_dev(host);
struct mmc_data *data = host->mrq->data;
- u32 *p = sg_virt(data->sg);
+ u32 *p;
int i;
if (host->sd_error) {
+ sg_miter_stop(sgm);
data->error = sh_mmcif_error_manage(host);
dev_dbg(dev, "%s(): %d\n", __func__, data->error);
return false;
}
+ if (!sg_miter_next(sgm)) {
+ /* This should not happen on single blocks */
+ sg_miter_stop(sgm);
+ return false;
+ }
+
+ p = sgm->addr;
+
for (i = 0; i < host->blocksize / 4; i++)
sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++);
+ sg_miter_stop(&host->sg_miter);
+
/* buffer write end */
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
host->wait_for = MMCIF_WAIT_FOR_WRITE_END;
@@ -738,6 +763,7 @@ static bool sh_mmcif_write_block(struct sh_mmcif_host *host)
static void sh_mmcif_multi_write(struct sh_mmcif_host *host,
struct mmc_request *mrq)
{
+ struct sg_mapping_iter *sgm = &host->sg_miter;
struct mmc_data *data = mrq->data;
if (!data->sg_len || !data->sg->length)
@@ -746,34 +772,46 @@ static void sh_mmcif_multi_write(struct sh_mmcif_host *host,
host->blocksize = sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET) &
BLOCK_SIZE_MASK;
+ sg_miter_start(sgm, data->sg, data->sg_len,
+ SG_MITER_FROM_SG);
+
+ /* Advance to the first sglist entry */
+ if (!sg_miter_next(sgm)) {
+ sg_miter_stop(sgm);
+ return;
+ }
+
host->wait_for = MMCIF_WAIT_FOR_MWRITE;
- host->sg_idx = 0;
- host->sg_blkidx = 0;
- host->pio_ptr = sg_virt(data->sg);
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
}
static bool sh_mmcif_mwrite_block(struct sh_mmcif_host *host)
{
+ struct sg_mapping_iter *sgm = &host->sg_miter;
struct device *dev = sh_mmcif_host_to_dev(host);
struct mmc_data *data = host->mrq->data;
- u32 *p = host->pio_ptr;
+ u32 *p;
int i;
if (host->sd_error) {
+ sg_miter_stop(sgm);
data->error = sh_mmcif_error_manage(host);
dev_dbg(dev, "%s(): %d\n", __func__, data->error);
return false;
}
- BUG_ON(!data->sg->length);
+ p = sgm->addr;
for (i = 0; i < host->blocksize / 4; i++)
sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++);
- if (!sh_mmcif_next_block(host, p))
+ sgm->consumed = host->blocksize;
+
+ if (!sg_miter_next(sgm)) {
+ sg_miter_stop(sgm);
return false;
+ }
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
diff --git a/drivers/mmc/host/wbsd.c b/drivers/mmc/host/wbsd.c
index 001a468bc149..f0562f712d98 100644
--- a/drivers/mmc/host/wbsd.c
+++ b/drivers/mmc/host/wbsd.c
@@ -1284,8 +1284,6 @@ static int wbsd_scan(struct wbsd_host *host)
continue;
for (j = 0; j < ARRAY_SIZE(unlock_codes); j++) {
- id = 0xFFFF;
-
host->config = config_ports[i];
host->unlock_code = unlock_codes[j];
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-24 08:00:56 +0000