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-rw-r--r--drivers/dma/amba-pl08x.c4
-rw-r--r--drivers/dma/dmaengine.c35
-rw-r--r--drivers/dma/edma.c6
-rw-r--r--drivers/dma/imx-sdma.c19
-rw-r--r--drivers/dma/mmp_pdma.c204
-rw-r--r--drivers/dma/mmp_tdma.c6
-rw-r--r--drivers/dma/of-dma.c15
-rw-r--r--drivers/dma/pl330.c6
-rw-r--r--drivers/dma/s3c24xx-dma.c33
-rw-r--r--drivers/dma/sh/rcar-hpbdma.c11
10 files changed, 193 insertions, 146 deletions
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 16a2aa28f856..f68f1c1d560b 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -1169,7 +1169,7 @@ static void pl08x_desc_free(struct virt_dma_desc *vd)
struct pl08x_txd *txd = to_pl08x_txd(&vd->tx);
struct pl08x_dma_chan *plchan = to_pl08x_chan(vd->tx.chan);
- dma_descriptor_unmap(txd);
+ dma_descriptor_unmap(&vd->tx);
if (!txd->done)
pl08x_release_mux(plchan);
@@ -2167,7 +2167,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
/* Register slave channels */
ret = pl08x_dma_init_virtual_channels(pl08x, &pl08x->slave,
pl08x->pd->num_slave_channels, true);
- if (ret <= 0) {
+ if (ret < 0) {
dev_warn(&pl08x->adev->dev,
"%s failed to enumerate slave channels - %d\n",
__func__, ret);
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 4f08ee8c17b4..24095ff8a93b 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -568,6 +568,8 @@ EXPORT_SYMBOL_GPL(dma_get_any_slave_channel);
* @mask: capabilities that the channel must satisfy
* @fn: optional callback to disposition available channels
* @fn_param: opaque parameter to pass to dma_filter_fn
+ *
+ * Returns pointer to appropriate DMA channel on success or NULL.
*/
struct dma_chan *__dma_request_channel(const dma_cap_mask_t *mask,
dma_filter_fn fn, void *fn_param)
@@ -619,18 +621,43 @@ EXPORT_SYMBOL_GPL(__dma_request_channel);
* dma_request_slave_channel - try to allocate an exclusive slave channel
* @dev: pointer to client device structure
* @name: slave channel name
+ *
+ * Returns pointer to appropriate DMA channel on success or an error pointer.
*/
-struct dma_chan *dma_request_slave_channel(struct device *dev, const char *name)
+struct dma_chan *dma_request_slave_channel_reason(struct device *dev,
+ const char *name)
{
+ struct dma_chan *chan;
+
/* If device-tree is present get slave info from here */
if (dev->of_node)
return of_dma_request_slave_channel(dev->of_node, name);
/* If device was enumerated by ACPI get slave info from here */
- if (ACPI_HANDLE(dev))
- return acpi_dma_request_slave_chan_by_name(dev, name);
+ if (ACPI_HANDLE(dev)) {
+ chan = acpi_dma_request_slave_chan_by_name(dev, name);
+ if (chan)
+ return chan;
+ }
- return NULL;
+ return ERR_PTR(-ENODEV);
+}
+EXPORT_SYMBOL_GPL(dma_request_slave_channel_reason);
+
+/**
+ * dma_request_slave_channel - try to allocate an exclusive slave channel
+ * @dev: pointer to client device structure
+ * @name: slave channel name
+ *
+ * Returns pointer to appropriate DMA channel on success or NULL.
+ */
+struct dma_chan *dma_request_slave_channel(struct device *dev,
+ const char *name)
+{
+ struct dma_chan *ch = dma_request_slave_channel_reason(dev, name);
+ if (IS_ERR(ch))
+ return NULL;
+ return ch;
}
EXPORT_SYMBOL_GPL(dma_request_slave_channel);
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index 2539ea0cbc63..cd8da451d199 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -699,8 +699,8 @@ static int edma_alloc_chan_resources(struct dma_chan *chan)
echan->alloced = true;
echan->slot[0] = echan->ch_num;
- dev_info(dev, "allocated channel for %u:%u\n",
- EDMA_CTLR(echan->ch_num), EDMA_CHAN_SLOT(echan->ch_num));
+ dev_dbg(dev, "allocated channel for %u:%u\n",
+ EDMA_CTLR(echan->ch_num), EDMA_CHAN_SLOT(echan->ch_num));
return 0;
@@ -736,7 +736,7 @@ static void edma_free_chan_resources(struct dma_chan *chan)
echan->alloced = false;
}
- dev_info(dev, "freeing channel for %u\n", echan->ch_num);
+ dev_dbg(dev, "freeing channel for %u\n", echan->ch_num);
}
/* Send pending descriptor to hardware */
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index c75679d42028..152247675feb 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -323,6 +323,7 @@ struct sdma_engine {
struct clk *clk_ipg;
struct clk *clk_ahb;
spinlock_t channel_0_lock;
+ u32 script_number;
struct sdma_script_start_addrs *script_addrs;
const struct sdma_driver_data *drvdata;
};
@@ -724,6 +725,10 @@ static void sdma_get_pc(struct sdma_channel *sdmac,
per_2_emi = sdma->script_addrs->app_2_mcu_addr;
emi_2_per = sdma->script_addrs->mcu_2_app_addr;
break;
+ case IMX_DMATYPE_SSI_DUAL:
+ per_2_emi = sdma->script_addrs->ssish_2_mcu_addr;
+ emi_2_per = sdma->script_addrs->mcu_2_ssish_addr;
+ break;
case IMX_DMATYPE_SSI_SP:
case IMX_DMATYPE_MMC:
case IMX_DMATYPE_SDHC:
@@ -1238,6 +1243,7 @@ static void sdma_issue_pending(struct dma_chan *chan)
}
#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1 34
+#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2 38
static void sdma_add_scripts(struct sdma_engine *sdma,
const struct sdma_script_start_addrs *addr)
@@ -1246,7 +1252,7 @@ static void sdma_add_scripts(struct sdma_engine *sdma,
s32 *saddr_arr = (u32 *)sdma->script_addrs;
int i;
- for (i = 0; i < SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; i++)
+ for (i = 0; i < sdma->script_number; i++)
if (addr_arr[i] > 0)
saddr_arr[i] = addr_arr[i];
}
@@ -1272,6 +1278,17 @@ static void sdma_load_firmware(const struct firmware *fw, void *context)
goto err_firmware;
if (header->ram_code_start + header->ram_code_size > fw->size)
goto err_firmware;
+ switch (header->version_major) {
+ case 1:
+ sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1;
+ break;
+ case 2:
+ sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2;
+ break;
+ default:
+ dev_err(sdma->dev, "unknown firmware version\n");
+ goto err_firmware;
+ }
addr = (void *)header + header->script_addrs_start;
ram_code = (void *)header + header->ram_code_start;
diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c
index 2998f1bffac1..c1b7c3ac7676 100644
--- a/drivers/dma/mmp_pdma.c
+++ b/drivers/dma/mmp_pdma.c
@@ -5,6 +5,7 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+
#include <linux/err.h>
#include <linux/module.h>
#include <linux/init.h>
@@ -32,38 +33,37 @@
#define DTADR 0x0208
#define DCMD 0x020c
-#define DCSR_RUN (1 << 31) /* Run Bit (read / write) */
-#define DCSR_NODESC (1 << 30) /* No-Descriptor Fetch (read / write) */
-#define DCSR_STOPIRQEN (1 << 29) /* Stop Interrupt Enable (read / write) */
-#define DCSR_REQPEND (1 << 8) /* Request Pending (read-only) */
-#define DCSR_STOPSTATE (1 << 3) /* Stop State (read-only) */
-#define DCSR_ENDINTR (1 << 2) /* End Interrupt (read / write) */
-#define DCSR_STARTINTR (1 << 1) /* Start Interrupt (read / write) */
-#define DCSR_BUSERR (1 << 0) /* Bus Error Interrupt (read / write) */
-
-#define DCSR_EORIRQEN (1 << 28) /* End of Receive Interrupt Enable (R/W) */
-#define DCSR_EORJMPEN (1 << 27) /* Jump to next descriptor on EOR */
-#define DCSR_EORSTOPEN (1 << 26) /* STOP on an EOR */
-#define DCSR_SETCMPST (1 << 25) /* Set Descriptor Compare Status */
-#define DCSR_CLRCMPST (1 << 24) /* Clear Descriptor Compare Status */
-#define DCSR_CMPST (1 << 10) /* The Descriptor Compare Status */
-#define DCSR_EORINTR (1 << 9) /* The end of Receive */
-
-#define DRCMR(n) ((((n) < 64) ? 0x0100 : 0x1100) + \
- (((n) & 0x3f) << 2))
-#define DRCMR_MAPVLD (1 << 7) /* Map Valid (read / write) */
-#define DRCMR_CHLNUM 0x1f /* mask for Channel Number (read / write) */
+#define DCSR_RUN BIT(31) /* Run Bit (read / write) */
+#define DCSR_NODESC BIT(30) /* No-Descriptor Fetch (read / write) */
+#define DCSR_STOPIRQEN BIT(29) /* Stop Interrupt Enable (read / write) */
+#define DCSR_REQPEND BIT(8) /* Request Pending (read-only) */
+#define DCSR_STOPSTATE BIT(3) /* Stop State (read-only) */
+#define DCSR_ENDINTR BIT(2) /* End Interrupt (read / write) */
+#define DCSR_STARTINTR BIT(1) /* Start Interrupt (read / write) */
+#define DCSR_BUSERR BIT(0) /* Bus Error Interrupt (read / write) */
+
+#define DCSR_EORIRQEN BIT(28) /* End of Receive Interrupt Enable (R/W) */
+#define DCSR_EORJMPEN BIT(27) /* Jump to next descriptor on EOR */
+#define DCSR_EORSTOPEN BIT(26) /* STOP on an EOR */
+#define DCSR_SETCMPST BIT(25) /* Set Descriptor Compare Status */
+#define DCSR_CLRCMPST BIT(24) /* Clear Descriptor Compare Status */
+#define DCSR_CMPST BIT(10) /* The Descriptor Compare Status */
+#define DCSR_EORINTR BIT(9) /* The end of Receive */
+
+#define DRCMR(n) ((((n) < 64) ? 0x0100 : 0x1100) + (((n) & 0x3f) << 2))
+#define DRCMR_MAPVLD BIT(7) /* Map Valid (read / write) */
+#define DRCMR_CHLNUM 0x1f /* mask for Channel Number (read / write) */
#define DDADR_DESCADDR 0xfffffff0 /* Address of next descriptor (mask) */
-#define DDADR_STOP (1 << 0) /* Stop (read / write) */
-
-#define DCMD_INCSRCADDR (1 << 31) /* Source Address Increment Setting. */
-#define DCMD_INCTRGADDR (1 << 30) /* Target Address Increment Setting. */
-#define DCMD_FLOWSRC (1 << 29) /* Flow Control by the source. */
-#define DCMD_FLOWTRG (1 << 28) /* Flow Control by the target. */
-#define DCMD_STARTIRQEN (1 << 22) /* Start Interrupt Enable */
-#define DCMD_ENDIRQEN (1 << 21) /* End Interrupt Enable */
-#define DCMD_ENDIAN (1 << 18) /* Device Endian-ness. */
+#define DDADR_STOP BIT(0) /* Stop (read / write) */
+
+#define DCMD_INCSRCADDR BIT(31) /* Source Address Increment Setting. */
+#define DCMD_INCTRGADDR BIT(30) /* Target Address Increment Setting. */
+#define DCMD_FLOWSRC BIT(29) /* Flow Control by the source. */
+#define DCMD_FLOWTRG BIT(28) /* Flow Control by the target. */
+#define DCMD_STARTIRQEN BIT(22) /* Start Interrupt Enable */
+#define DCMD_ENDIRQEN BIT(21) /* End Interrupt Enable */
+#define DCMD_ENDIAN BIT(18) /* Device Endian-ness. */
#define DCMD_BURST8 (1 << 16) /* 8 byte burst */
#define DCMD_BURST16 (2 << 16) /* 16 byte burst */
#define DCMD_BURST32 (3 << 16) /* 32 byte burst */
@@ -132,10 +132,14 @@ struct mmp_pdma_device {
spinlock_t phy_lock; /* protect alloc/free phy channels */
};
-#define tx_to_mmp_pdma_desc(tx) container_of(tx, struct mmp_pdma_desc_sw, async_tx)
-#define to_mmp_pdma_desc(lh) container_of(lh, struct mmp_pdma_desc_sw, node)
-#define to_mmp_pdma_chan(dchan) container_of(dchan, struct mmp_pdma_chan, chan)
-#define to_mmp_pdma_dev(dmadev) container_of(dmadev, struct mmp_pdma_device, device)
+#define tx_to_mmp_pdma_desc(tx) \
+ container_of(tx, struct mmp_pdma_desc_sw, async_tx)
+#define to_mmp_pdma_desc(lh) \
+ container_of(lh, struct mmp_pdma_desc_sw, node)
+#define to_mmp_pdma_chan(dchan) \
+ container_of(dchan, struct mmp_pdma_chan, chan)
+#define to_mmp_pdma_dev(dmadev) \
+ container_of(dmadev, struct mmp_pdma_device, device)
static void set_desc(struct mmp_pdma_phy *phy, dma_addr_t addr)
{
@@ -162,19 +166,18 @@ static void enable_chan(struct mmp_pdma_phy *phy)
writel(dalgn, phy->base + DALGN);
reg = (phy->idx << 2) + DCSR;
- writel(readl(phy->base + reg) | DCSR_RUN,
- phy->base + reg);
+ writel(readl(phy->base + reg) | DCSR_RUN, phy->base + reg);
}
static void disable_chan(struct mmp_pdma_phy *phy)
{
u32 reg;
- if (phy) {
- reg = (phy->idx << 2) + DCSR;
- writel(readl(phy->base + reg) & ~DCSR_RUN,
- phy->base + reg);
- }
+ if (!phy)
+ return;
+
+ reg = (phy->idx << 2) + DCSR;
+ writel(readl(phy->base + reg) & ~DCSR_RUN, phy->base + reg);
}
static int clear_chan_irq(struct mmp_pdma_phy *phy)
@@ -183,26 +186,27 @@ static int clear_chan_irq(struct mmp_pdma_phy *phy)
u32 dint = readl(phy->base + DINT);
u32 reg = (phy->idx << 2) + DCSR;
- if (dint & BIT(phy->idx)) {
- /* clear irq */
- dcsr = readl(phy->base + reg);
- writel(dcsr, phy->base + reg);
- if ((dcsr & DCSR_BUSERR) && (phy->vchan))
- dev_warn(phy->vchan->dev, "DCSR_BUSERR\n");
- return 0;
- }
- return -EAGAIN;
+ if (!(dint & BIT(phy->idx)))
+ return -EAGAIN;
+
+ /* clear irq */
+ dcsr = readl(phy->base + reg);
+ writel(dcsr, phy->base + reg);
+ if ((dcsr & DCSR_BUSERR) && (phy->vchan))
+ dev_warn(phy->vchan->dev, "DCSR_BUSERR\n");
+
+ return 0;
}
static irqreturn_t mmp_pdma_chan_handler(int irq, void *dev_id)
{
struct mmp_pdma_phy *phy = dev_id;
- if (clear_chan_irq(phy) == 0) {
- tasklet_schedule(&phy->vchan->tasklet);
- return IRQ_HANDLED;
- } else
+ if (clear_chan_irq(phy) != 0)
return IRQ_NONE;
+
+ tasklet_schedule(&phy->vchan->tasklet);
+ return IRQ_HANDLED;
}
static irqreturn_t mmp_pdma_int_handler(int irq, void *dev_id)
@@ -224,8 +228,8 @@ static irqreturn_t mmp_pdma_int_handler(int irq, void *dev_id)
if (irq_num)
return IRQ_HANDLED;
- else
- return IRQ_NONE;
+
+ return IRQ_NONE;
}
/* lookup free phy channel as descending priority */
@@ -245,9 +249,9 @@ static struct mmp_pdma_phy *lookup_phy(struct mmp_pdma_chan *pchan)
*/
spin_lock_irqsave(&pdev->phy_lock, flags);
- for (prio = 0; prio <= (((pdev->dma_channels - 1) & 0xf) >> 2); prio++) {
+ for (prio = 0; prio <= ((pdev->dma_channels - 1) & 0xf) >> 2; prio++) {
for (i = 0; i < pdev->dma_channels; i++) {
- if (prio != ((i & 0xf) >> 2))
+ if (prio != (i & 0xf) >> 2)
continue;
phy = &pdev->phy[i];
if (!phy->vchan) {
@@ -389,14 +393,16 @@ static int mmp_pdma_alloc_chan_resources(struct dma_chan *dchan)
if (chan->desc_pool)
return 1;
- chan->desc_pool =
- dma_pool_create(dev_name(&dchan->dev->device), chan->dev,
- sizeof(struct mmp_pdma_desc_sw),
- __alignof__(struct mmp_pdma_desc_sw), 0);
+ chan->desc_pool = dma_pool_create(dev_name(&dchan->dev->device),
+ chan->dev,
+ sizeof(struct mmp_pdma_desc_sw),
+ __alignof__(struct mmp_pdma_desc_sw),
+ 0);
if (!chan->desc_pool) {
dev_err(chan->dev, "unable to allocate descriptor pool\n");
return -ENOMEM;
}
+
mmp_pdma_free_phy(chan);
chan->idle = true;
chan->dev_addr = 0;
@@ -404,7 +410,7 @@ static int mmp_pdma_alloc_chan_resources(struct dma_chan *dchan)
}
static void mmp_pdma_free_desc_list(struct mmp_pdma_chan *chan,
- struct list_head *list)
+ struct list_head *list)
{
struct mmp_pdma_desc_sw *desc, *_desc;
@@ -434,8 +440,8 @@ static void mmp_pdma_free_chan_resources(struct dma_chan *dchan)
static struct dma_async_tx_descriptor *
mmp_pdma_prep_memcpy(struct dma_chan *dchan,
- dma_addr_t dma_dst, dma_addr_t dma_src,
- size_t len, unsigned long flags)
+ dma_addr_t dma_dst, dma_addr_t dma_src,
+ size_t len, unsigned long flags)
{
struct mmp_pdma_chan *chan;
struct mmp_pdma_desc_sw *first = NULL, *prev = NULL, *new;
@@ -515,8 +521,8 @@ fail:
static struct dma_async_tx_descriptor *
mmp_pdma_prep_slave_sg(struct dma_chan *dchan, struct scatterlist *sgl,
- unsigned int sg_len, enum dma_transfer_direction dir,
- unsigned long flags, void *context)
+ unsigned int sg_len, enum dma_transfer_direction dir,
+ unsigned long flags, void *context)
{
struct mmp_pdma_chan *chan = to_mmp_pdma_chan(dchan);
struct mmp_pdma_desc_sw *first = NULL, *prev = NULL, *new = NULL;
@@ -591,10 +597,11 @@ fail:
return NULL;
}
-static struct dma_async_tx_descriptor *mmp_pdma_prep_dma_cyclic(
- struct dma_chan *dchan, dma_addr_t buf_addr, size_t len,
- size_t period_len, enum dma_transfer_direction direction,
- unsigned long flags, void *context)
+static struct dma_async_tx_descriptor *
+mmp_pdma_prep_dma_cyclic(struct dma_chan *dchan,
+ dma_addr_t buf_addr, size_t len, size_t period_len,
+ enum dma_transfer_direction direction,
+ unsigned long flags, void *context)
{
struct mmp_pdma_chan *chan;
struct mmp_pdma_desc_sw *first = NULL, *prev = NULL, *new;
@@ -636,8 +643,8 @@ static struct dma_async_tx_descriptor *mmp_pdma_prep_dma_cyclic(
goto fail;
}
- new->desc.dcmd = chan->dcmd | DCMD_ENDIRQEN |
- (DCMD_LENGTH & period_len);
+ new->desc.dcmd = (chan->dcmd | DCMD_ENDIRQEN |
+ (DCMD_LENGTH & period_len));
new->desc.dsadr = dma_src;
new->desc.dtadr = dma_dst;
@@ -677,12 +684,11 @@ fail:
}
static int mmp_pdma_control(struct dma_chan *dchan, enum dma_ctrl_cmd cmd,
- unsigned long arg)
+ unsigned long arg)
{
struct mmp_pdma_chan *chan = to_mmp_pdma_chan(dchan);
struct dma_slave_config *cfg = (void *)arg;
unsigned long flags;
- int ret = 0;
u32 maxburst = 0, addr = 0;
enum dma_slave_buswidth width = DMA_SLAVE_BUSWIDTH_UNDEFINED;
@@ -739,11 +745,12 @@ static int mmp_pdma_control(struct dma_chan *dchan, enum dma_ctrl_cmd cmd,
return -ENOSYS;
}
- return ret;
+ return 0;
}
static enum dma_status mmp_pdma_tx_status(struct dma_chan *dchan,
- dma_cookie_t cookie, struct dma_tx_state *txstate)
+ dma_cookie_t cookie,
+ struct dma_tx_state *txstate)
{
return dma_cookie_status(dchan, cookie, txstate);
}
@@ -845,15 +852,14 @@ static int mmp_pdma_remove(struct platform_device *op)
return 0;
}
-static int mmp_pdma_chan_init(struct mmp_pdma_device *pdev,
- int idx, int irq)
+static int mmp_pdma_chan_init(struct mmp_pdma_device *pdev, int idx, int irq)
{
struct mmp_pdma_phy *phy = &pdev->phy[idx];
struct mmp_pdma_chan *chan;
int ret;
- chan = devm_kzalloc(pdev->dev,
- sizeof(struct mmp_pdma_chan), GFP_KERNEL);
+ chan = devm_kzalloc(pdev->dev, sizeof(struct mmp_pdma_chan),
+ GFP_KERNEL);
if (chan == NULL)
return -ENOMEM;
@@ -861,8 +867,8 @@ static int mmp_pdma_chan_init(struct mmp_pdma_device *pdev,
phy->base = pdev->base;
if (irq) {
- ret = devm_request_irq(pdev->dev, irq,
- mmp_pdma_chan_handler, 0, "pdma", phy);
+ ret = devm_request_irq(pdev->dev, irq, mmp_pdma_chan_handler, 0,
+ "pdma", phy);
if (ret) {
dev_err(pdev->dev, "channel request irq fail!\n");
return ret;
@@ -877,8 +883,7 @@ static int mmp_pdma_chan_init(struct mmp_pdma_device *pdev,
INIT_LIST_HEAD(&chan->chain_running);
/* register virt channel to dma engine */
- list_add_tail(&chan->chan.device_node,
- &pdev->device.channels);
+ list_add_tail(&chan->chan.device_node, &pdev->device.channels);
return 0;
}
@@ -900,8 +905,14 @@ static struct dma_chan *mmp_pdma_dma_xlate(struct of_phandle_args *dma_spec,
if (!chan)
return NULL;
- c = to_mmp_pdma_chan(chan);
- c->drcmr = dma_spec->args[0];
+ /* dma_get_slave_channel will return NULL if we lost a race between
+ * the lookup and the reservation */
+ chan = dma_get_slave_channel(candidate);
+
+ if (!chan)
+ goto retry;
+
+ to_mmp_pdma_chan(chan)->drcmr = dma_spec->args[0];
return chan;
}
@@ -918,6 +929,7 @@ static int mmp_pdma_probe(struct platform_device *op)
pdev = devm_kzalloc(&op->dev, sizeof(*pdev), GFP_KERNEL);
if (!pdev)
return -ENOMEM;
+
pdev->dev = &op->dev;
spin_lock_init(&pdev->phy_lock);
@@ -929,8 +941,8 @@ static int mmp_pdma_probe(struct platform_device *op)
of_id = of_match_device(mmp_pdma_dt_ids, pdev->dev);
if (of_id)
- of_property_read_u32(pdev->dev->of_node,
- "#dma-channels", &dma_channels);
+ of_property_read_u32(pdev->dev->of_node, "#dma-channels",
+ &dma_channels);
else if (pdata && pdata->dma_channels)
dma_channels = pdata->dma_channels;
else
@@ -942,8 +954,9 @@ static int mmp_pdma_probe(struct platform_device *op)
irq_num++;
}
- pdev->phy = devm_kzalloc(pdev->dev,
- dma_channels * sizeof(struct mmp_pdma_chan), GFP_KERNEL);
+ pdev->phy = devm_kcalloc(pdev->dev,
+ dma_channels, sizeof(struct mmp_pdma_chan),
+ GFP_KERNEL);
if (pdev->phy == NULL)
return -ENOMEM;
@@ -952,8 +965,8 @@ static int mmp_pdma_probe(struct platform_device *op)
if (irq_num != dma_channels) {
/* all chan share one irq, demux inside */
irq = platform_get_irq(op, 0);
- ret = devm_request_irq(pdev->dev, irq,
- mmp_pdma_int_handler, 0, "pdma", pdev);
+ ret = devm_request_irq(pdev->dev, irq, mmp_pdma_int_handler, 0,
+ "pdma", pdev);
if (ret)
return ret;
}
@@ -1001,6 +1014,7 @@ static int mmp_pdma_probe(struct platform_device *op)
}
}
+ platform_set_drvdata(op, pdev);
dev_info(pdev->device.dev, "initialized %d channels\n", dma_channels);
return 0;
}
@@ -1028,7 +1042,7 @@ bool mmp_pdma_filter_fn(struct dma_chan *chan, void *param)
if (chan->device->dev->driver != &mmp_pdma_driver.driver)
return false;
- c->drcmr = *(unsigned int *) param;
+ c->drcmr = *(unsigned int *)param;
return true;
}
@@ -1036,6 +1050,6 @@ EXPORT_SYMBOL_GPL(mmp_pdma_filter_fn);
module_platform_driver(mmp_pdma_driver);
-MODULE_DESCRIPTION("MARVELL MMP Periphera DMA Driver");
+MODULE_DESCRIPTION("MARVELL MMP Peripheral DMA Driver");
MODULE_AUTHOR("Marvell International Ltd.");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c
index 3ddacc14a736..d4b730ce0369 100644
--- a/drivers/dma/mmp_tdma.c
+++ b/drivers/dma/mmp_tdma.c
@@ -121,7 +121,7 @@ struct mmp_tdma_chan {
int idx;
enum mmp_tdma_type type;
int irq;
- unsigned long reg_base;
+ void __iomem *reg_base;
size_t buf_len;
size_t period_len;
@@ -182,7 +182,7 @@ static void mmp_tdma_pause_chan(struct mmp_tdma_chan *tdmac)
static int mmp_tdma_config_chan(struct mmp_tdma_chan *tdmac)
{
- unsigned int tdcr;
+ unsigned int tdcr = 0;
mmp_tdma_disable_chan(tdmac);
@@ -526,7 +526,7 @@ static int mmp_tdma_chan_init(struct mmp_tdma_device *tdev,
tdmac->chan.device = &tdev->device;
tdmac->idx = idx;
tdmac->type = type;
- tdmac->reg_base = (unsigned long)tdev->base + idx * 4;
+ tdmac->reg_base = tdev->base + idx * 4;
tdmac->status = DMA_COMPLETE;
tdev->tdmac[tdmac->idx] = tdmac;
tasklet_init(&tdmac->tasklet, dma_do_tasklet, (unsigned long)tdmac);
diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c
index 0b88dd3d05f4..e8fe9dc455f4 100644
--- a/drivers/dma/of-dma.c
+++ b/drivers/dma/of-dma.c
@@ -143,7 +143,7 @@ static int of_dma_match_channel(struct device_node *np, const char *name,
* @np: device node to get DMA request from
* @name: name of desired channel
*
- * Returns pointer to appropriate dma channel on success or NULL on error.
+ * Returns pointer to appropriate DMA channel on success or an error pointer.
*/
struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
const char *name)
@@ -152,17 +152,18 @@ struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
struct of_dma *ofdma;
struct dma_chan *chan;
int count, i;
+ int ret_no_channel = -ENODEV;
if (!np || !name) {
pr_err("%s: not enough information provided\n", __func__);
- return NULL;
+ return ERR_PTR(-ENODEV);
}
count = of_property_count_strings(np, "dma-names");
if (count < 0) {
pr_err("%s: dma-names property of node '%s' missing or empty\n",
__func__, np->full_name);
- return NULL;
+ return ERR_PTR(-ENODEV);
}
for (i = 0; i < count; i++) {
@@ -172,10 +173,12 @@ struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
mutex_lock(&of_dma_lock);
ofdma = of_dma_find_controller(&dma_spec);
- if (ofdma)
+ if (ofdma) {
chan = ofdma->of_dma_xlate(&dma_spec, ofdma);
- else
+ } else {
+ ret_no_channel = -EPROBE_DEFER;
chan = NULL;
+ }
mutex_unlock(&of_dma_lock);
@@ -185,7 +188,7 @@ struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
return chan;
}
- return NULL;
+ return ERR_PTR(ret_no_channel);
}
/**
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index cdf0483b8f2d..7adaf3abffba 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -578,6 +578,9 @@ struct dma_pl330_dmac {
/* DMA-Engine Device */
struct dma_device ddma;
+ /* Holds info about sg limitations */
+ struct device_dma_parameters dma_parms;
+
/* Pool of descriptors available for the DMAC's channels */
struct list_head desc_pool;
/* To protect desc_pool manipulation */
@@ -3023,6 +3026,9 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
"unable to register DMA to the generic DT DMA helpers\n");
}
}
+
+ adev->dev.dma_parms = &pdmac->dma_parms;
+
/*
* This is the limit for transfers with a buswidth of 1, larger
* buswidths will have larger limits.
diff --git a/drivers/dma/s3c24xx-dma.c b/drivers/dma/s3c24xx-dma.c
index 4cb127978636..4eddedb6eb7d 100644
--- a/drivers/dma/s3c24xx-dma.c
+++ b/drivers/dma/s3c24xx-dma.c
@@ -628,42 +628,13 @@ retry:
s3cchan->state = S3C24XX_DMA_CHAN_IDLE;
}
-static void s3c24xx_dma_unmap_buffers(struct s3c24xx_txd *txd)
-{
- struct device *dev = txd->vd.tx.chan->device->dev;
- struct s3c24xx_sg *dsg;
-
- if (!(txd->vd.tx.flags & DMA_COMPL_SKIP_SRC_UNMAP)) {
- if (txd->vd.tx.flags & DMA_COMPL_SRC_UNMAP_SINGLE)
- list_for_each_entry(dsg, &txd->dsg_list, node)
- dma_unmap_single(dev, dsg->src_addr, dsg->len,
- DMA_TO_DEVICE);
- else {
- list_for_each_entry(dsg, &txd->dsg_list, node)
- dma_unmap_page(dev, dsg->src_addr, dsg->len,
- DMA_TO_DEVICE);
- }
- }
-
- if (!(txd->vd.tx.flags & DMA_COMPL_SKIP_DEST_UNMAP)) {
- if (txd->vd.tx.flags & DMA_COMPL_DEST_UNMAP_SINGLE)
- list_for_each_entry(dsg, &txd->dsg_list, node)
- dma_unmap_single(dev, dsg->dst_addr, dsg->len,
- DMA_FROM_DEVICE);
- else
- list_for_each_entry(dsg, &txd->dsg_list, node)
- dma_unmap_page(dev, dsg->dst_addr, dsg->len,
- DMA_FROM_DEVICE);
- }
-}
-
static void s3c24xx_dma_desc_free(struct virt_dma_desc *vd)
{
struct s3c24xx_txd *txd = to_s3c24xx_txd(&vd->tx);
struct s3c24xx_dma_chan *s3cchan = to_s3c24xx_dma_chan(vd->tx.chan);
if (!s3cchan->slave)
- s3c24xx_dma_unmap_buffers(txd);
+ dma_descriptor_unmap(&vd->tx);
s3c24xx_dma_free_txd(txd);
}
@@ -795,7 +766,7 @@ static enum dma_status s3c24xx_dma_tx_status(struct dma_chan *chan,
spin_lock_irqsave(&s3cchan->vc.lock, flags);
ret = dma_cookie_status(chan, cookie, txstate);
- if (ret == DMA_SUCCESS) {
+ if (ret == DMA_COMPLETE) {
spin_unlock_irqrestore(&s3cchan->vc.lock, flags);
return ret;
}
diff --git a/drivers/dma/sh/rcar-hpbdma.c b/drivers/dma/sh/rcar-hpbdma.c
index ebad84591a6e..3083d901a414 100644
--- a/drivers/dma/sh/rcar-hpbdma.c
+++ b/drivers/dma/sh/rcar-hpbdma.c
@@ -60,6 +60,7 @@
#define HPB_DMAE_DSTPR_DMSTP BIT(0)
/* DMA status register (DSTSR) bits */
+#define HPB_DMAE_DSTSR_DQSTS BIT(2)
#define HPB_DMAE_DSTSR_DMSTS BIT(0)
/* DMA common registers */
@@ -286,6 +287,9 @@ static void hpb_dmae_halt(struct shdma_chan *schan)
ch_reg_write(chan, HPB_DMAE_DCMDR_DQEND, HPB_DMAE_DCMDR);
ch_reg_write(chan, HPB_DMAE_DSTPR_DMSTP, HPB_DMAE_DSTPR);
+
+ chan->plane_idx = 0;
+ chan->first_desc = true;
}
static const struct hpb_dmae_slave_config *
@@ -385,7 +389,10 @@ static bool hpb_dmae_channel_busy(struct shdma_chan *schan)
struct hpb_dmae_chan *chan = to_chan(schan);
u32 dstsr = ch_reg_read(chan, HPB_DMAE_DSTSR);
- return (dstsr & HPB_DMAE_DSTSR_DMSTS) == HPB_DMAE_DSTSR_DMSTS;
+ if (chan->xfer_mode == XFER_DOUBLE)
+ return dstsr & HPB_DMAE_DSTSR_DQSTS;
+ else
+ return dstsr & HPB_DMAE_DSTSR_DMSTS;
}
static int
@@ -510,6 +517,8 @@ static int hpb_dmae_chan_probe(struct hpb_dmae_device *hpbdev, int id)
}
schan = &new_hpb_chan->shdma_chan;
+ schan->max_xfer_len = HPB_DMA_TCR_MAX;
+
shdma_chan_probe(sdev, schan, id);
if (pdev->id >= 0)
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-06 22:15:15 +0000