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path: root/drivers/dma/imx-sdma.c
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Diffstat (limited to 'drivers/dma/imx-sdma.c')
-rw-r--r--drivers/dma/imx-sdma.c187
1 files changed, 88 insertions, 99 deletions
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 63540d3..d3e38e2 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -20,6 +20,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>
+#include <linux/bitops.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/clk.h>
@@ -41,6 +42,8 @@
#include <mach/dma.h>
#include <mach/hardware.h>
+#include "dmaengine.h"
+
/* SDMA registers */
#define SDMA_H_C0PTR 0x000
#define SDMA_H_INTR 0x004
@@ -259,19 +262,18 @@ struct sdma_channel {
unsigned int pc_from_device, pc_to_device;
unsigned long flags;
dma_addr_t per_address;
- u32 event_mask0, event_mask1;
- u32 watermark_level;
+ unsigned long event_mask[2];
+ unsigned long watermark_level;
u32 shp_addr, per_addr;
struct dma_chan chan;
spinlock_t lock;
struct dma_async_tx_descriptor desc;
- dma_cookie_t last_completed;
enum dma_status status;
unsigned int chn_count;
unsigned int chn_real_count;
};
-#define IMX_DMA_SG_LOOP (1 << 0)
+#define IMX_DMA_SG_LOOP BIT(0)
#define MAX_DMA_CHANNELS 32
#define MXC_SDMA_DEFAULT_PRIORITY 1
@@ -345,9 +347,9 @@ static const struct of_device_id sdma_dt_ids[] = {
};
MODULE_DEVICE_TABLE(of, sdma_dt_ids);
-#define SDMA_H_CONFIG_DSPDMA (1 << 12) /* indicates if the DSPDMA is used */
-#define SDMA_H_CONFIG_RTD_PINS (1 << 11) /* indicates if Real-Time Debug pins are enabled */
-#define SDMA_H_CONFIG_ACR (1 << 4) /* indicates if AHB freq /core freq = 2 or 1 */
+#define SDMA_H_CONFIG_DSPDMA BIT(12) /* indicates if the DSPDMA is used */
+#define SDMA_H_CONFIG_RTD_PINS BIT(11) /* indicates if Real-Time Debug pins are enabled */
+#define SDMA_H_CONFIG_ACR BIT(4) /* indicates if AHB freq /core freq = 2 or 1 */
#define SDMA_H_CONFIG_CSM (3) /* indicates which context switch mode is selected*/
static inline u32 chnenbl_ofs(struct sdma_engine *sdma, unsigned int event)
@@ -362,37 +364,42 @@ static int sdma_config_ownership(struct sdma_channel *sdmac,
{
struct sdma_engine *sdma = sdmac->sdma;
int channel = sdmac->channel;
- u32 evt, mcu, dsp;
+ unsigned long evt, mcu, dsp;
if (event_override && mcu_override && dsp_override)
return -EINVAL;
- evt = __raw_readl(sdma->regs + SDMA_H_EVTOVR);
- mcu = __raw_readl(sdma->regs + SDMA_H_HOSTOVR);
- dsp = __raw_readl(sdma->regs + SDMA_H_DSPOVR);
+ evt = readl_relaxed(sdma->regs + SDMA_H_EVTOVR);
+ mcu = readl_relaxed(sdma->regs + SDMA_H_HOSTOVR);
+ dsp = readl_relaxed(sdma->regs + SDMA_H_DSPOVR);
if (dsp_override)
- dsp &= ~(1 << channel);
+ __clear_bit(channel, &dsp);
else
- dsp |= (1 << channel);
+ __set_bit(channel, &dsp);
if (event_override)
- evt &= ~(1 << channel);
+ __clear_bit(channel, &evt);
else
- evt |= (1 << channel);
+ __set_bit(channel, &evt);
if (mcu_override)
- mcu &= ~(1 << channel);
+ __clear_bit(channel, &mcu);
else
- mcu |= (1 << channel);
+ __set_bit(channel, &mcu);
- __raw_writel(evt, sdma->regs + SDMA_H_EVTOVR);
- __raw_writel(mcu, sdma->regs + SDMA_H_HOSTOVR);
- __raw_writel(dsp, sdma->regs + SDMA_H_DSPOVR);
+ writel_relaxed(evt, sdma->regs + SDMA_H_EVTOVR);
+ writel_relaxed(mcu, sdma->regs + SDMA_H_HOSTOVR);
+ writel_relaxed(dsp, sdma->regs + SDMA_H_DSPOVR);
return 0;
}
+static void sdma_enable_channel(struct sdma_engine *sdma, int channel)
+{
+ writel(BIT(channel), sdma->regs + SDMA_H_START);
+}
+
/*
* sdma_run_channel - run a channel and wait till it's done
*/
@@ -404,7 +411,7 @@ static int sdma_run_channel(struct sdma_channel *sdmac)
init_completion(&sdmac->done);
- __raw_writel(1 << channel, sdma->regs + SDMA_H_START);
+ sdma_enable_channel(sdma, channel);
ret = wait_for_completion_timeout(&sdmac->done, HZ);
@@ -451,12 +458,12 @@ static void sdma_event_enable(struct sdma_channel *sdmac, unsigned int event)
{
struct sdma_engine *sdma = sdmac->sdma;
int channel = sdmac->channel;
- u32 val;
+ unsigned long val;
u32 chnenbl = chnenbl_ofs(sdma, event);
- val = __raw_readl(sdma->regs + chnenbl);
- val |= (1 << channel);
- __raw_writel(val, sdma->regs + chnenbl);
+ val = readl_relaxed(sdma->regs + chnenbl);
+ __set_bit(channel, &val);
+ writel_relaxed(val, sdma->regs + chnenbl);
}
static void sdma_event_disable(struct sdma_channel *sdmac, unsigned int event)
@@ -464,11 +471,11 @@ static void sdma_event_disable(struct sdma_channel *sdmac, unsigned int event)
struct sdma_engine *sdma = sdmac->sdma;
int channel = sdmac->channel;
u32 chnenbl = chnenbl_ofs(sdma, event);
- u32 val;
+ unsigned long val;
- val = __raw_readl(sdma->regs + chnenbl);
- val &= ~(1 << channel);
- __raw_writel(val, sdma->regs + chnenbl);
+ val = readl_relaxed(sdma->regs + chnenbl);
+ __clear_bit(channel, &val);
+ writel_relaxed(val, sdma->regs + chnenbl);
}
static void sdma_handle_channel_loop(struct sdma_channel *sdmac)
@@ -522,7 +529,7 @@ static void mxc_sdma_handle_channel_normal(struct sdma_channel *sdmac)
else
sdmac->status = DMA_SUCCESS;
- sdmac->last_completed = sdmac->desc.cookie;
+ dma_cookie_complete(&sdmac->desc);
if (sdmac->desc.callback)
sdmac->desc.callback(sdmac->desc.callback_param);
}
@@ -544,10 +551,10 @@ static void mxc_sdma_handle_channel(struct sdma_channel *sdmac)
static irqreturn_t sdma_int_handler(int irq, void *dev_id)
{
struct sdma_engine *sdma = dev_id;
- u32 stat;
+ unsigned long stat;
- stat = __raw_readl(sdma->regs + SDMA_H_INTR);
- __raw_writel(stat, sdma->regs + SDMA_H_INTR);
+ stat = readl_relaxed(sdma->regs + SDMA_H_INTR);
+ writel_relaxed(stat, sdma->regs + SDMA_H_INTR);
while (stat) {
int channel = fls(stat) - 1;
@@ -555,7 +562,7 @@ static irqreturn_t sdma_int_handler(int irq, void *dev_id)
mxc_sdma_handle_channel(sdmac);
- stat &= ~(1 << channel);
+ __clear_bit(channel, &stat);
}
return IRQ_HANDLED;
@@ -663,11 +670,11 @@ static int sdma_load_context(struct sdma_channel *sdmac)
return load_address;
dev_dbg(sdma->dev, "load_address = %d\n", load_address);
- dev_dbg(sdma->dev, "wml = 0x%08x\n", sdmac->watermark_level);
+ dev_dbg(sdma->dev, "wml = 0x%08x\n", (u32)sdmac->watermark_level);
dev_dbg(sdma->dev, "shp_addr = 0x%08x\n", sdmac->shp_addr);
dev_dbg(sdma->dev, "per_addr = 0x%08x\n", sdmac->per_addr);
- dev_dbg(sdma->dev, "event_mask0 = 0x%08x\n", sdmac->event_mask0);
- dev_dbg(sdma->dev, "event_mask1 = 0x%08x\n", sdmac->event_mask1);
+ dev_dbg(sdma->dev, "event_mask0 = 0x%08x\n", (u32)sdmac->event_mask[0]);
+ dev_dbg(sdma->dev, "event_mask1 = 0x%08x\n", (u32)sdmac->event_mask[1]);
mutex_lock(&sdma->channel_0_lock);
@@ -677,8 +684,8 @@ static int sdma_load_context(struct sdma_channel *sdmac)
/* Send by context the event mask,base address for peripheral
* and watermark level
*/
- context->gReg[0] = sdmac->event_mask1;
- context->gReg[1] = sdmac->event_mask0;
+ context->gReg[0] = sdmac->event_mask[1];
+ context->gReg[1] = sdmac->event_mask[0];
context->gReg[2] = sdmac->per_addr;
context->gReg[6] = sdmac->shp_addr;
context->gReg[7] = sdmac->watermark_level;
@@ -701,7 +708,7 @@ static void sdma_disable_channel(struct sdma_channel *sdmac)
struct sdma_engine *sdma = sdmac->sdma;
int channel = sdmac->channel;
- __raw_writel(1 << channel, sdma->regs + SDMA_H_STATSTOP);
+ writel_relaxed(BIT(channel), sdma->regs + SDMA_H_STATSTOP);
sdmac->status = DMA_ERROR;
}
@@ -711,13 +718,13 @@ static int sdma_config_channel(struct sdma_channel *sdmac)
sdma_disable_channel(sdmac);
- sdmac->event_mask0 = 0;
- sdmac->event_mask1 = 0;
+ sdmac->event_mask[0] = 0;
+ sdmac->event_mask[1] = 0;
sdmac->shp_addr = 0;
sdmac->per_addr = 0;
if (sdmac->event_id0) {
- if (sdmac->event_id0 > 32)
+ if (sdmac->event_id0 >= sdmac->sdma->num_events)
return -EINVAL;
sdma_event_enable(sdmac, sdmac->event_id0);
}
@@ -740,15 +747,14 @@ static int sdma_config_channel(struct sdma_channel *sdmac)
(sdmac->peripheral_type != IMX_DMATYPE_DSP)) {
/* Handle multiple event channels differently */
if (sdmac->event_id1) {
- sdmac->event_mask1 = 1 << (sdmac->event_id1 % 32);
+ sdmac->event_mask[1] = BIT(sdmac->event_id1 % 32);
if (sdmac->event_id1 > 31)
- sdmac->watermark_level |= 1 << 31;
- sdmac->event_mask0 = 1 << (sdmac->event_id0 % 32);
+ __set_bit(31, &sdmac->watermark_level);
+ sdmac->event_mask[0] = BIT(sdmac->event_id0 % 32);
if (sdmac->event_id0 > 31)
- sdmac->watermark_level |= 1 << 30;
+ __set_bit(30, &sdmac->watermark_level);
} else {
- sdmac->event_mask0 = 1 << sdmac->event_id0;
- sdmac->event_mask1 = 1 << (sdmac->event_id0 - 32);
+ __set_bit(sdmac->event_id0, sdmac->event_mask);
}
/* Watermark Level */
sdmac->watermark_level |= sdmac->watermark_level;
@@ -774,7 +780,7 @@ static int sdma_set_channel_priority(struct sdma_channel *sdmac,
return -EINVAL;
}
- __raw_writel(priority, sdma->regs + SDMA_CHNPRI_0 + 4 * channel);
+ writel_relaxed(priority, sdma->regs + SDMA_CHNPRI_0 + 4 * channel);
return 0;
}
@@ -796,8 +802,6 @@ static int sdma_request_channel(struct sdma_channel *sdmac)
sdma->channel_control[channel].base_bd_ptr = sdmac->bd_phys;
sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys;
- clk_enable(sdma->clk);
-
sdma_set_channel_priority(sdmac, MXC_SDMA_DEFAULT_PRIORITY);
init_completion(&sdmac->done);
@@ -810,24 +814,6 @@ out:
return ret;
}
-static void sdma_enable_channel(struct sdma_engine *sdma, int channel)
-{
- __raw_writel(1 << channel, sdma->regs + SDMA_H_START);
-}
-
-static dma_cookie_t sdma_assign_cookie(struct sdma_channel *sdmac)
-{
- dma_cookie_t cookie = sdmac->chan.cookie;
-
- if (++cookie < 0)
- cookie = 1;
-
- sdmac->chan.cookie = cookie;
- sdmac->desc.cookie = cookie;
-
- return cookie;
-}
-
static struct sdma_channel *to_sdma_chan(struct dma_chan *chan)
{
return container_of(chan, struct sdma_channel, chan);
@@ -837,14 +823,11 @@ static dma_cookie_t sdma_tx_submit(struct dma_async_tx_descriptor *tx)
{
unsigned long flags;
struct sdma_channel *sdmac = to_sdma_chan(tx->chan);
- struct sdma_engine *sdma = sdmac->sdma;
dma_cookie_t cookie;
spin_lock_irqsave(&sdmac->lock, flags);
- cookie = sdma_assign_cookie(sdmac);
-
- sdma_enable_channel(sdma, sdmac->channel);
+ cookie = dma_cookie_assign(tx);
spin_unlock_irqrestore(&sdmac->lock, flags);
@@ -875,11 +858,14 @@ static int sdma_alloc_chan_resources(struct dma_chan *chan)
sdmac->peripheral_type = data->peripheral_type;
sdmac->event_id0 = data->dma_request;
- ret = sdma_set_channel_priority(sdmac, prio);
+
+ clk_enable(sdmac->sdma->clk);
+
+ ret = sdma_request_channel(sdmac);
if (ret)
return ret;
- ret = sdma_request_channel(sdmac);
+ ret = sdma_set_channel_priority(sdmac, prio);
if (ret)
return ret;
@@ -916,7 +902,7 @@ static void sdma_free_chan_resources(struct dma_chan *chan)
static struct dma_async_tx_descriptor *sdma_prep_slave_sg(
struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len, enum dma_transfer_direction direction,
- unsigned long flags)
+ unsigned long flags, void *context)
{
struct sdma_channel *sdmac = to_sdma_chan(chan);
struct sdma_engine *sdma = sdmac->sdma;
@@ -1014,7 +1000,8 @@ err_out:
static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
- size_t period_len, enum dma_transfer_direction direction)
+ size_t period_len, enum dma_transfer_direction direction,
+ void *context)
{
struct sdma_channel *sdmac = to_sdma_chan(chan);
struct sdma_engine *sdma = sdmac->sdma;
@@ -1128,7 +1115,7 @@ static enum dma_status sdma_tx_status(struct dma_chan *chan,
last_used = chan->cookie;
- dma_set_tx_state(txstate, sdmac->last_completed, last_used,
+ dma_set_tx_state(txstate, chan->completed_cookie, last_used,
sdmac->chn_count - sdmac->chn_real_count);
return sdmac->status;
@@ -1136,9 +1123,11 @@ static enum dma_status sdma_tx_status(struct dma_chan *chan,
static void sdma_issue_pending(struct dma_chan *chan)
{
- /*
- * Nothing to do. We only have a single descriptor
- */
+ struct sdma_channel *sdmac = to_sdma_chan(chan);
+ struct sdma_engine *sdma = sdmac->sdma;
+
+ if (sdmac->status == DMA_IN_PROGRESS)
+ sdma_enable_channel(sdma, sdmac->channel);
}
#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1 34
@@ -1230,7 +1219,7 @@ static int __init sdma_init(struct sdma_engine *sdma)
clk_enable(sdma->clk);
/* Be sure SDMA has not started yet */
- __raw_writel(0, sdma->regs + SDMA_H_C0PTR);
+ writel_relaxed(0, sdma->regs + SDMA_H_C0PTR);
sdma->channel_control = dma_alloc_coherent(NULL,
MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control) +
@@ -1253,11 +1242,11 @@ static int __init sdma_init(struct sdma_engine *sdma)
/* disable all channels */
for (i = 0; i < sdma->num_events; i++)
- __raw_writel(0, sdma->regs + chnenbl_ofs(sdma, i));
+ writel_relaxed(0, sdma->regs + chnenbl_ofs(sdma, i));
/* All channels have priority 0 */
for (i = 0; i < MAX_DMA_CHANNELS; i++)
- __raw_writel(0, sdma->regs + SDMA_CHNPRI_0 + i * 4);
+ writel_relaxed(0, sdma->regs + SDMA_CHNPRI_0 + i * 4);
ret = sdma_request_channel(&sdma->channel[0]);
if (ret)
@@ -1266,16 +1255,16 @@ static int __init sdma_init(struct sdma_engine *sdma)
sdma_config_ownership(&sdma->channel[0], false, true, false);
/* Set Command Channel (Channel Zero) */
- __raw_writel(0x4050, sdma->regs + SDMA_CHN0ADDR);
+ writel_relaxed(0x4050, sdma->regs + SDMA_CHN0ADDR);
/* Set bits of CONFIG register but with static context switching */
/* FIXME: Check whether to set ACR bit depending on clock ratios */
- __raw_writel(0, sdma->regs + SDMA_H_CONFIG);
+ writel_relaxed(0, sdma->regs + SDMA_H_CONFIG);
- __raw_writel(ccb_phys, sdma->regs + SDMA_H_C0PTR);
+ writel_relaxed(ccb_phys, sdma->regs + SDMA_H_C0PTR);
/* Set bits of CONFIG register with given context switching mode */
- __raw_writel(SDMA_H_CONFIG_CSM, sdma->regs + SDMA_H_CONFIG);
+ writel_relaxed(SDMA_H_CONFIG_CSM, sdma->regs + SDMA_H_CONFIG);
/* Initializes channel's priorities */
sdma_set_channel_priority(&sdma->channel[0], 7);
@@ -1367,6 +1356,7 @@ static int __init sdma_probe(struct platform_device *pdev)
spin_lock_init(&sdmac->lock);
sdmac->chan.device = &sdma->dma_device;
+ dma_cookie_init(&sdmac->chan);
sdmac->channel = i;
/*
@@ -1387,7 +1377,9 @@ static int __init sdma_probe(struct platform_device *pdev)
sdma_add_scripts(sdma, pdata->script_addrs);
if (pdata) {
- sdma_get_firmware(sdma, pdata->fw_name);
+ ret = sdma_get_firmware(sdma, pdata->fw_name);
+ if (ret)
+ dev_warn(&pdev->dev, "failed to get firmware from platform data\n");
} else {
/*
* Because that device tree does not encode ROM script address,
@@ -1396,15 +1388,12 @@ static int __init sdma_probe(struct platform_device *pdev)
*/
ret = of_property_read_string(np, "fsl,sdma-ram-script-name",
&fw_name);
- if (ret) {
- dev_err(&pdev->dev, "failed to get firmware name\n");
- goto err_init;
- }
-
- ret = sdma_get_firmware(sdma, fw_name);
- if (ret) {
- dev_err(&pdev->dev, "failed to get firmware\n");
- goto err_init;
+ if (ret)
+ dev_warn(&pdev->dev, "failed to get firmware name\n");
+ else {
+ ret = sdma_get_firmware(sdma, fw_name);
+ if (ret)
+ dev_warn(&pdev->dev, "failed to get firmware from device tree\n");
}
}
generated by cgit v0.10.2 at 2024-11-19 01:56:11 (GMT)