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path: root/drivers/dma/tegra20-apb-dma.c
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Diffstat (limited to 'drivers/dma/tegra20-apb-dma.c')
-rw-r--r--drivers/dma/tegra20-apb-dma.c286
1 files changed, 233 insertions, 53 deletions
diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index 3cad856fe67..03ad64ecaaf 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -1,7 +1,7 @@
/*
* DMA driver for Nvidia's Tegra20 APB DMA controller.
*
- * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2012-2013, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -21,6 +21,7 @@
#include <linux/delay.h>
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
+#include <linux/err.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
@@ -28,11 +29,13 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/of_dma.h>
#include <linux/platform_device.h>
+#include <linux/pm.h>
#include <linux/pm_runtime.h>
+#include <linux/reset.h>
#include <linux/slab.h>
-#include <mach/clk.h>
#include "dmaengine.h"
#define TEGRA_APBDMA_GENERAL 0x0
@@ -62,6 +65,9 @@
#define TEGRA_APBDMA_STATUS_COUNT_SHIFT 2
#define TEGRA_APBDMA_STATUS_COUNT_MASK 0xFFFC
+#define TEGRA_APBDMA_CHAN_CSRE 0x00C
+#define TEGRA_APBDMA_CHAN_CSRE_PAUSE (1 << 31)
+
/* AHB memory address */
#define TEGRA_APBDMA_CHAN_AHBPTR 0x010
@@ -94,6 +100,11 @@
#define TEGRA_APBDMA_APBSEQ_DATA_SWAP BIT(27)
#define TEGRA_APBDMA_APBSEQ_WRAP_WORD_1 (1 << 16)
+/* Tegra148 specific registers */
+#define TEGRA_APBDMA_CHAN_WCOUNT 0x20
+
+#define TEGRA_APBDMA_CHAN_WORD_TRANSFER 0x24
+
/*
* If any burst is in flight and DMA paused then this is the time to complete
* on-flight burst and update DMA status register.
@@ -103,19 +114,22 @@
/* Channel base address offset from APBDMA base address */
#define TEGRA_APBDMA_CHANNEL_BASE_ADD_OFFSET 0x1000
-/* DMA channel register space size */
-#define TEGRA_APBDMA_CHANNEL_REGISTER_SIZE 0x20
-
struct tegra_dma;
/*
* tegra_dma_chip_data Tegra chip specific DMA data
* @nr_channels: Number of channels available in the controller.
+ * @channel_reg_size: Channel register size/stride.
* @max_dma_count: Maximum DMA transfer count supported by DMA controller.
+ * @support_channel_pause: Support channel wise pause of dma.
+ * @support_separate_wcount_reg: Support separate word count register.
*/
struct tegra_dma_chip_data {
int nr_channels;
+ int channel_reg_size;
int max_dma_count;
+ bool support_channel_pause;
+ bool support_separate_wcount_reg;
};
/* DMA channel registers */
@@ -125,6 +139,7 @@ struct tegra_dma_channel_regs {
unsigned long apb_ptr;
unsigned long ahb_seq;
unsigned long apb_seq;
+ unsigned long wcount;
};
/*
@@ -192,7 +207,9 @@ struct tegra_dma_channel {
void *callback_param;
/* Channel-slave specific configuration */
+ unsigned int slave_id;
struct dma_slave_config dma_sconfig;
+ struct tegra_dma_channel_regs channel_reg;
};
/* tegra_dma: Tegra DMA specific information */
@@ -200,6 +217,7 @@ struct tegra_dma {
struct dma_device dma_dev;
struct device *dev;
struct clk *dma_clk;
+ struct reset_control *rst;
spinlock_t global_lock;
void __iomem *base_addr;
const struct tegra_dma_chip_data *chip_data;
@@ -331,6 +349,8 @@ static int tegra_dma_slave_config(struct dma_chan *dc,
}
memcpy(&tdc->dma_sconfig, sconfig, sizeof(*sconfig));
+ if (!tdc->slave_id)
+ tdc->slave_id = sconfig->slave_id;
tdc->config_init = true;
return 0;
}
@@ -354,6 +374,32 @@ static void tegra_dma_global_resume(struct tegra_dma_channel *tdc)
spin_unlock(&tdma->global_lock);
}
+static void tegra_dma_pause(struct tegra_dma_channel *tdc,
+ bool wait_for_burst_complete)
+{
+ struct tegra_dma *tdma = tdc->tdma;
+
+ if (tdma->chip_data->support_channel_pause) {
+ tdc_write(tdc, TEGRA_APBDMA_CHAN_CSRE,
+ TEGRA_APBDMA_CHAN_CSRE_PAUSE);
+ if (wait_for_burst_complete)
+ udelay(TEGRA_APBDMA_BURST_COMPLETE_TIME);
+ } else {
+ tegra_dma_global_pause(tdc, wait_for_burst_complete);
+ }
+}
+
+static void tegra_dma_resume(struct tegra_dma_channel *tdc)
+{
+ struct tegra_dma *tdma = tdc->tdma;
+
+ if (tdma->chip_data->support_channel_pause) {
+ tdc_write(tdc, TEGRA_APBDMA_CHAN_CSRE, 0);
+ } else {
+ tegra_dma_global_resume(tdc);
+ }
+}
+
static void tegra_dma_stop(struct tegra_dma_channel *tdc)
{
u32 csr;
@@ -387,6 +433,8 @@ static void tegra_dma_start(struct tegra_dma_channel *tdc,
tdc_write(tdc, TEGRA_APBDMA_CHAN_APBPTR, ch_regs->apb_ptr);
tdc_write(tdc, TEGRA_APBDMA_CHAN_AHBSEQ, ch_regs->ahb_seq);
tdc_write(tdc, TEGRA_APBDMA_CHAN_AHBPTR, ch_regs->ahb_ptr);
+ if (tdc->tdma->chip_data->support_separate_wcount_reg)
+ tdc_write(tdc, TEGRA_APBDMA_CHAN_WCOUNT, ch_regs->wcount);
/* Start DMA */
tdc_write(tdc, TEGRA_APBDMA_CHAN_CSR,
@@ -409,7 +457,7 @@ static void tegra_dma_configure_for_next(struct tegra_dma_channel *tdc,
* If there is already IEC status then interrupt handler need to
* load new configuration.
*/
- tegra_dma_global_pause(tdc, false);
+ tegra_dma_pause(tdc, false);
status = tdc_read(tdc, TEGRA_APBDMA_CHAN_STATUS);
/*
@@ -419,18 +467,21 @@ static void tegra_dma_configure_for_next(struct tegra_dma_channel *tdc,
if (status & TEGRA_APBDMA_STATUS_ISE_EOC) {
dev_err(tdc2dev(tdc),
"Skipping new configuration as interrupt is pending\n");
- tegra_dma_global_resume(tdc);
+ tegra_dma_resume(tdc);
return;
}
/* Safe to program new configuration */
tdc_write(tdc, TEGRA_APBDMA_CHAN_APBPTR, nsg_req->ch_regs.apb_ptr);
tdc_write(tdc, TEGRA_APBDMA_CHAN_AHBPTR, nsg_req->ch_regs.ahb_ptr);
+ if (tdc->tdma->chip_data->support_separate_wcount_reg)
+ tdc_write(tdc, TEGRA_APBDMA_CHAN_WCOUNT,
+ nsg_req->ch_regs.wcount);
tdc_write(tdc, TEGRA_APBDMA_CHAN_CSR,
nsg_req->ch_regs.csr | TEGRA_APBDMA_CSR_ENB);
nsg_req->configured = true;
- tegra_dma_global_resume(tdc);
+ tegra_dma_resume(tdc);
}
static void tdc_start_head_req(struct tegra_dma_channel *tdc)
@@ -536,7 +587,7 @@ static void handle_once_dma_done(struct tegra_dma_channel *tdc,
list_del(&sgreq->node);
if (sgreq->last_sg) {
- dma_desc->dma_status = DMA_SUCCESS;
+ dma_desc->dma_status = DMA_COMPLETE;
dma_cookie_complete(&dma_desc->txd);
if (!dma_desc->cb_count)
list_add_tail(&dma_desc->cb_node, &tdc->cb_desc);
@@ -679,6 +730,7 @@ static void tegra_dma_terminate_all(struct dma_chan *dc)
struct tegra_dma_desc *dma_desc;
unsigned long flags;
unsigned long status;
+ unsigned long wcount;
bool was_busy;
spin_lock_irqsave(&tdc->lock, flags);
@@ -691,7 +743,7 @@ static void tegra_dma_terminate_all(struct dma_chan *dc)
goto skip_dma_stop;
/* Pause DMA before checking the queue status */
- tegra_dma_global_pause(tdc, true);
+ tegra_dma_pause(tdc, true);
status = tdc_read(tdc, TEGRA_APBDMA_CHAN_STATUS);
if (status & TEGRA_APBDMA_STATUS_ISE_EOC) {
@@ -699,6 +751,10 @@ static void tegra_dma_terminate_all(struct dma_chan *dc)
tdc->isr_handler(tdc, true);
status = tdc_read(tdc, TEGRA_APBDMA_CHAN_STATUS);
}
+ if (tdc->tdma->chip_data->support_separate_wcount_reg)
+ wcount = tdc_read(tdc, TEGRA_APBDMA_CHAN_WORD_TRANSFER);
+ else
+ wcount = status;
was_busy = tdc->busy;
tegra_dma_stop(tdc);
@@ -707,9 +763,9 @@ static void tegra_dma_terminate_all(struct dma_chan *dc)
sgreq = list_first_entry(&tdc->pending_sg_req,
typeof(*sgreq), node);
sgreq->dma_desc->bytes_transferred +=
- get_current_xferred_count(tdc, sgreq, status);
+ get_current_xferred_count(tdc, sgreq, wcount);
}
- tegra_dma_global_resume(tdc);
+ tegra_dma_resume(tdc);
skip_dma_stop:
tegra_dma_abort_all(tdc);
@@ -733,14 +789,11 @@ static enum dma_status tegra_dma_tx_status(struct dma_chan *dc,
unsigned long flags;
unsigned int residual;
- spin_lock_irqsave(&tdc->lock, flags);
-
ret = dma_cookie_status(dc, cookie, txstate);
- if (ret == DMA_SUCCESS) {
- dma_set_residue(txstate, 0);
- spin_unlock_irqrestore(&tdc->lock, flags);
+ if (ret == DMA_COMPLETE)
return ret;
- }
+
+ spin_lock_irqsave(&tdc->lock, flags);
/* Check on wait_ack desc status */
list_for_each_entry(dma_desc, &tdc->free_dma_desc, node) {
@@ -872,6 +925,17 @@ static int get_transfer_param(struct tegra_dma_channel *tdc,
return -EINVAL;
}
+static void tegra_dma_prep_wcount(struct tegra_dma_channel *tdc,
+ struct tegra_dma_channel_regs *ch_regs, u32 len)
+{
+ u32 len_field = (len - 4) & 0xFFFC;
+
+ if (tdc->tdma->chip_data->support_separate_wcount_reg)
+ ch_regs->wcount = len_field;
+ else
+ ch_regs->csr |= len_field;
+}
+
static struct dma_async_tx_descriptor *tegra_dma_prep_slave_sg(
struct dma_chan *dc, struct scatterlist *sgl, unsigned int sg_len,
enum dma_transfer_direction direction, unsigned long flags,
@@ -910,7 +974,7 @@ static struct dma_async_tx_descriptor *tegra_dma_prep_slave_sg(
ahb_seq |= TEGRA_APBDMA_AHBSEQ_BUS_WIDTH_32;
csr |= TEGRA_APBDMA_CSR_ONCE | TEGRA_APBDMA_CSR_FLOW;
- csr |= tdc->dma_sconfig.slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT;
+ csr |= tdc->slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT;
if (flags & DMA_PREP_INTERRUPT)
csr |= TEGRA_APBDMA_CSR_IE_EOC;
@@ -955,7 +1019,8 @@ static struct dma_async_tx_descriptor *tegra_dma_prep_slave_sg(
sg_req->ch_regs.apb_ptr = apb_ptr;
sg_req->ch_regs.ahb_ptr = mem;
- sg_req->ch_regs.csr = csr | ((len - 4) & 0xFFFC);
+ sg_req->ch_regs.csr = csr;
+ tegra_dma_prep_wcount(tdc, &sg_req->ch_regs, len);
sg_req->ch_regs.apb_seq = apb_seq;
sg_req->ch_regs.ahb_seq = ahb_seq;
sg_req->configured = false;
@@ -987,7 +1052,7 @@ static struct dma_async_tx_descriptor *tegra_dma_prep_slave_sg(
return &dma_desc->txd;
}
-struct dma_async_tx_descriptor *tegra_dma_prep_dma_cyclic(
+static struct dma_async_tx_descriptor *tegra_dma_prep_dma_cyclic(
struct dma_chan *dc, dma_addr_t buf_addr, size_t buf_len,
size_t period_len, enum dma_transfer_direction direction,
unsigned long flags, void *context)
@@ -1054,7 +1119,7 @@ struct dma_async_tx_descriptor *tegra_dma_prep_dma_cyclic(
csr |= TEGRA_APBDMA_CSR_FLOW;
if (flags & DMA_PREP_INTERRUPT)
csr |= TEGRA_APBDMA_CSR_IE_EOC;
- csr |= tdc->dma_sconfig.slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT;
+ csr |= tdc->slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT;
apb_seq |= TEGRA_APBDMA_APBSEQ_WRAP_WORD_1;
@@ -1084,7 +1149,8 @@ struct dma_async_tx_descriptor *tegra_dma_prep_dma_cyclic(
ahb_seq |= get_burst_size(tdc, burst_size, slave_bw, len);
sg_req->ch_regs.apb_ptr = apb_ptr;
sg_req->ch_regs.ahb_ptr = mem;
- sg_req->ch_regs.csr = csr | ((len - 4) & 0xFFFC);
+ sg_req->ch_regs.csr = csr;
+ tegra_dma_prep_wcount(tdc, &sg_req->ch_regs, len);
sg_req->ch_regs.apb_seq = apb_seq;
sg_req->ch_regs.ahb_seq = ahb_seq;
sg_req->configured = false;
@@ -1158,6 +1224,7 @@ static void tegra_dma_free_chan_resources(struct dma_chan *dc)
list_splice_init(&tdc->free_dma_desc, &dma_desc_list);
INIT_LIST_HEAD(&tdc->cb_desc);
tdc->config_init = false;
+ tdc->isr_handler = NULL;
spin_unlock_irqrestore(&tdc->lock, flags);
while (!list_empty(&dma_desc_list)) {
@@ -1173,23 +1240,72 @@ static void tegra_dma_free_chan_resources(struct dma_chan *dc)
kfree(sg_req);
}
clk_disable_unprepare(tdma->dma_clk);
+
+ tdc->slave_id = 0;
+}
+
+static struct dma_chan *tegra_dma_of_xlate(struct of_phandle_args *dma_spec,
+ struct of_dma *ofdma)
+{
+ struct tegra_dma *tdma = ofdma->of_dma_data;
+ struct dma_chan *chan;
+ struct tegra_dma_channel *tdc;
+
+ chan = dma_get_any_slave_channel(&tdma->dma_dev);
+ if (!chan)
+ return NULL;
+
+ tdc = to_tegra_dma_chan(chan);
+ tdc->slave_id = dma_spec->args[0];
+
+ return chan;
}
/* Tegra20 specific DMA controller information */
static const struct tegra_dma_chip_data tegra20_dma_chip_data = {
.nr_channels = 16,
+ .channel_reg_size = 0x20,
.max_dma_count = 1024UL * 64,
+ .support_channel_pause = false,
+ .support_separate_wcount_reg = false,
};
-#if defined(CONFIG_OF)
/* Tegra30 specific DMA controller information */
static const struct tegra_dma_chip_data tegra30_dma_chip_data = {
.nr_channels = 32,
+ .channel_reg_size = 0x20,
+ .max_dma_count = 1024UL * 64,
+ .support_channel_pause = false,
+ .support_separate_wcount_reg = false,
+};
+
+/* Tegra114 specific DMA controller information */
+static const struct tegra_dma_chip_data tegra114_dma_chip_data = {
+ .nr_channels = 32,
+ .channel_reg_size = 0x20,
.max_dma_count = 1024UL * 64,
+ .support_channel_pause = true,
+ .support_separate_wcount_reg = false,
};
+/* Tegra148 specific DMA controller information */
+static const struct tegra_dma_chip_data tegra148_dma_chip_data = {
+ .nr_channels = 32,
+ .channel_reg_size = 0x40,
+ .max_dma_count = 1024UL * 64,
+ .support_channel_pause = true,
+ .support_separate_wcount_reg = true,
+};
+
+
static const struct of_device_id tegra_dma_of_match[] = {
{
+ .compatible = "nvidia,tegra148-apbdma",
+ .data = &tegra148_dma_chip_data,
+ }, {
+ .compatible = "nvidia,tegra114-apbdma",
+ .data = &tegra114_dma_chip_data,
+ }, {
.compatible = "nvidia,tegra30-apbdma",
.data = &tegra30_dma_chip_data,
}, {
@@ -1199,7 +1315,6 @@ static const struct of_device_id tegra_dma_of_match[] = {
},
};
MODULE_DEVICE_TABLE(of, tegra_dma_of_match);
-#endif
static int tegra_dma_probe(struct platform_device *pdev)
{
@@ -1208,20 +1323,14 @@ static int tegra_dma_probe(struct platform_device *pdev)
int ret;
int i;
const struct tegra_dma_chip_data *cdata = NULL;
+ const struct of_device_id *match;
- if (pdev->dev.of_node) {
- const struct of_device_id *match;
- match = of_match_device(of_match_ptr(tegra_dma_of_match),
- &pdev->dev);
- if (!match) {
- dev_err(&pdev->dev, "Error: No device match found\n");
- return -ENODEV;
- }
- cdata = match->data;
- } else {
- /* If no device tree then fallback to tegra20 */
- cdata = &tegra20_dma_chip_data;
+ match = of_match_device(tegra_dma_of_match, &pdev->dev);
+ if (!match) {
+ dev_err(&pdev->dev, "Error: No device match found\n");
+ return -ENODEV;
}
+ cdata = match->data;
tdma = devm_kzalloc(&pdev->dev, sizeof(*tdma) + cdata->nr_channels *
sizeof(struct tegra_dma_channel), GFP_KERNEL);
@@ -1235,17 +1344,9 @@ static int tegra_dma_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, tdma);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "No mem resource for DMA\n");
- return -EINVAL;
- }
-
- tdma->base_addr = devm_request_and_ioremap(&pdev->dev, res);
- if (!tdma->base_addr) {
- dev_err(&pdev->dev,
- "Cannot request memregion/iomap dma address\n");
- return -EADDRNOTAVAIL;
- }
+ tdma->base_addr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(tdma->base_addr))
+ return PTR_ERR(tdma->base_addr);
tdma->dma_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(tdma->dma_clk)) {
@@ -1253,6 +1354,12 @@ static int tegra_dma_probe(struct platform_device *pdev)
return PTR_ERR(tdma->dma_clk);
}
+ tdma->rst = devm_reset_control_get(&pdev->dev, "dma");
+ if (IS_ERR(tdma->rst)) {
+ dev_err(&pdev->dev, "Error: Missing reset\n");
+ return PTR_ERR(tdma->rst);
+ }
+
spin_lock_init(&tdma->global_lock);
pm_runtime_enable(&pdev->dev);
@@ -1273,9 +1380,9 @@ static int tegra_dma_probe(struct platform_device *pdev)
}
/* Reset DMA controller */
- tegra_periph_reset_assert(tdma->dma_clk);
+ reset_control_assert(tdma->rst);
udelay(2);
- tegra_periph_reset_deassert(tdma->dma_clk);
+ reset_control_deassert(tdma->rst);
/* Enable global DMA registers */
tdma_write(tdma, TEGRA_APBDMA_GENERAL, TEGRA_APBDMA_GENERAL_ENABLE);
@@ -1289,7 +1396,7 @@ static int tegra_dma_probe(struct platform_device *pdev)
struct tegra_dma_channel *tdc = &tdma->channels[i];
tdc->chan_base_offset = TEGRA_APBDMA_CHANNEL_BASE_ADD_OFFSET +
- i * TEGRA_APBDMA_CHANNEL_REGISTER_SIZE;
+ i * cdata->channel_reg_size;
res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
if (!res) {
@@ -1304,7 +1411,7 @@ static int tegra_dma_probe(struct platform_device *pdev)
if (ret) {
dev_err(&pdev->dev,
"request_irq failed with err %d channel %d\n",
- i, ret);
+ ret, i);
goto err_irq;
}
@@ -1347,10 +1454,20 @@ static int tegra_dma_probe(struct platform_device *pdev)
goto err_irq;
}
+ ret = of_dma_controller_register(pdev->dev.of_node,
+ tegra_dma_of_xlate, tdma);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "Tegra20 APB DMA OF registration failed %d\n", ret);
+ goto err_unregister_dma_dev;
+ }
+
dev_info(&pdev->dev, "Tegra20 APB DMA driver register %d channels\n",
cdata->nr_channels);
return 0;
+err_unregister_dma_dev:
+ dma_async_device_unregister(&tdma->dma_dev);
err_irq:
while (--i >= 0) {
struct tegra_dma_channel *tdc = &tdma->channels[i];
@@ -1407,11 +1524,74 @@ static int tegra_dma_runtime_resume(struct device *dev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int tegra_dma_pm_suspend(struct device *dev)
+{
+ struct tegra_dma *tdma = dev_get_drvdata(dev);
+ int i;
+ int ret;
+
+ /* Enable clock before accessing register */
+ ret = tegra_dma_runtime_resume(dev);
+ if (ret < 0)
+ return ret;
+
+ tdma->reg_gen = tdma_read(tdma, TEGRA_APBDMA_GENERAL);
+ for (i = 0; i < tdma->chip_data->nr_channels; i++) {
+ struct tegra_dma_channel *tdc = &tdma->channels[i];
+ struct tegra_dma_channel_regs *ch_reg = &tdc->channel_reg;
+
+ ch_reg->csr = tdc_read(tdc, TEGRA_APBDMA_CHAN_CSR);
+ ch_reg->ahb_ptr = tdc_read(tdc, TEGRA_APBDMA_CHAN_AHBPTR);
+ ch_reg->apb_ptr = tdc_read(tdc, TEGRA_APBDMA_CHAN_APBPTR);
+ ch_reg->ahb_seq = tdc_read(tdc, TEGRA_APBDMA_CHAN_AHBSEQ);
+ ch_reg->apb_seq = tdc_read(tdc, TEGRA_APBDMA_CHAN_APBSEQ);
+ }
+
+ /* Disable clock */
+ tegra_dma_runtime_suspend(dev);
+ return 0;
+}
+
+static int tegra_dma_pm_resume(struct device *dev)
+{
+ struct tegra_dma *tdma = dev_get_drvdata(dev);
+ int i;
+ int ret;
+
+ /* Enable clock before accessing register */
+ ret = tegra_dma_runtime_resume(dev);
+ if (ret < 0)
+ return ret;
+
+ tdma_write(tdma, TEGRA_APBDMA_GENERAL, tdma->reg_gen);
+ tdma_write(tdma, TEGRA_APBDMA_CONTROL, 0);
+ tdma_write(tdma, TEGRA_APBDMA_IRQ_MASK_SET, 0xFFFFFFFFul);
+
+ for (i = 0; i < tdma->chip_data->nr_channels; i++) {
+ struct tegra_dma_channel *tdc = &tdma->channels[i];
+ struct tegra_dma_channel_regs *ch_reg = &tdc->channel_reg;
+
+ tdc_write(tdc, TEGRA_APBDMA_CHAN_APBSEQ, ch_reg->apb_seq);
+ tdc_write(tdc, TEGRA_APBDMA_CHAN_APBPTR, ch_reg->apb_ptr);
+ tdc_write(tdc, TEGRA_APBDMA_CHAN_AHBSEQ, ch_reg->ahb_seq);
+ tdc_write(tdc, TEGRA_APBDMA_CHAN_AHBPTR, ch_reg->ahb_ptr);
+ tdc_write(tdc, TEGRA_APBDMA_CHAN_CSR,
+ (ch_reg->csr & ~TEGRA_APBDMA_CSR_ENB));
+ }
+
+ /* Disable clock */
+ tegra_dma_runtime_suspend(dev);
+ return 0;
+}
+#endif
+
static const struct dev_pm_ops tegra_dma_dev_pm_ops = {
#ifdef CONFIG_PM_RUNTIME
.runtime_suspend = tegra_dma_runtime_suspend,
.runtime_resume = tegra_dma_runtime_resume,
#endif
+ SET_SYSTEM_SLEEP_PM_OPS(tegra_dma_pm_suspend, tegra_dma_pm_resume)
};
static struct platform_driver tegra_dmac_driver = {
@@ -1419,7 +1599,7 @@ static struct platform_driver tegra_dmac_driver = {
.name = "tegra-apbdma",
.owner = THIS_MODULE,
.pm = &tegra_dma_dev_pm_ops,
- .of_match_table = of_match_ptr(tegra_dma_of_match),
+ .of_match_table = tegra_dma_of_match,
},
.probe = tegra_dma_probe,
.remove = tegra_dma_remove,
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 12:14:46 +0000