Here is a kinda big refactoring that should have been done
in the first place, when Intel iDMA 32-bit support appeared.
It splits operations which are different to Synopsys DesignWare and
Intel iDMA 32-bit controllers.
No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
drivers/dma/dw/Makefile | 2 +-
drivers/dma/dw/core.c | 190 +++++----------------------
drivers/dma/dw/dw.c | 112 ++++++++++++++++
drivers/dma/dw/idma32.c | 138 +++++++++++++++++++
drivers/dma/dw/internal.h | 10 +-
drivers/dma/dw/pci.c | 45 ++++---
drivers/dma/dw/platform.c | 8 +-
drivers/dma/dw/regs.h | 13 ++
include/linux/dma/dw.h | 4 +
include/linux/platform_data/dma-dw.h | 2 -
10 files changed, 343 insertions(+), 181 deletions(-)
create mode 100644 drivers/dma/dw/dw.c
create mode 100644 drivers/dma/dw/idma32.c
diff --git a/drivers/dma/dw/Makefile b/drivers/dma/dw/Makefile
index 2b949c2e4504..63ed895c09aa 100644
--- a/drivers/dma/dw/Makefile
+++ b/drivers/dma/dw/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_DW_DMAC_CORE) += dw_dmac_core.o
-dw_dmac_core-objs := core.o
+dw_dmac_core-objs := core.o dw.o idma32.o
obj-$(CONFIG_DW_DMAC) += dw_dmac.o
dw_dmac-objs := platform.o
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index 4982e443869c..8a581d86ea8d 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -138,44 +138,6 @@ static void dwc_desc_put(struct dw_dma_chan *dwc, struct dw_desc *desc)
dwc->descs_allocated--;
}
-static void dwc_initialize_chan_idma32(struct dw_dma_chan *dwc)
-{
- u32 cfghi = 0;
- u32 cfglo = 0;
-
- /* Set default burst alignment */
- cfglo |= IDMA32C_CFGL_DST_BURST_ALIGN | IDMA32C_CFGL_SRC_BURST_ALIGN;
-
- /* Low 4 bits of the request lines */
- cfghi |= IDMA32C_CFGH_DST_PER(dwc->dws.dst_id & 0xf);
- cfghi |= IDMA32C_CFGH_SRC_PER(dwc->dws.src_id & 0xf);
-
- /* Request line extension (2 bits) */
- cfghi |= IDMA32C_CFGH_DST_PER_EXT(dwc->dws.dst_id >> 4 & 0x3);
- cfghi |= IDMA32C_CFGH_SRC_PER_EXT(dwc->dws.src_id >> 4 & 0x3);
-
- channel_writel(dwc, CFG_LO, cfglo);
- channel_writel(dwc, CFG_HI, cfghi);
-}
-
-static void dwc_initialize_chan_dw(struct dw_dma_chan *dwc)
-{
- struct dw_dma *dw = to_dw_dma(dwc->chan.device);
- u32 cfghi = DWC_CFGH_FIFO_MODE;
- u32 cfglo = DWC_CFGL_CH_PRIOR(dwc->priority);
- bool hs_polarity = dwc->dws.hs_polarity;
-
- cfghi |= DWC_CFGH_DST_PER(dwc->dws.dst_id);
- cfghi |= DWC_CFGH_SRC_PER(dwc->dws.src_id);
- cfghi |= DWC_CFGH_PROTCTL(dw->pdata->protctl);
-
- /* Set polarity of handshake interface */
- cfglo |= hs_polarity ? DWC_CFGL_HS_DST_POL | DWC_CFGL_HS_SRC_POL : 0;
-
- channel_writel(dwc, CFG_LO, cfglo);
- channel_writel(dwc, CFG_HI, cfghi);
-}
-
static void dwc_initialize(struct dw_dma_chan *dwc)
{
struct dw_dma *dw = to_dw_dma(dwc->chan.device);
@@ -183,10 +145,7 @@ static void dwc_initialize(struct dw_dma_chan *dwc)
if (test_bit(DW_DMA_IS_INITIALIZED, &dwc->flags))
return;
- if (dw->pdata->is_idma32)
- dwc_initialize_chan_idma32(dwc);
- else
- dwc_initialize_chan_dw(dwc);
+ dw->initialize_chan(dwc);
/* Enable interrupts */
channel_set_bit(dw, MASK.XFER, dwc->mask);
@@ -215,37 +174,6 @@ static inline void dwc_chan_disable(struct dw_dma *dw, struct dw_dma_chan *dwc)
cpu_relax();
}
-static u32 bytes2block(struct dw_dma_chan *dwc, size_t bytes,
- unsigned int width, size_t *len)
-{
- struct dw_dma *dw = to_dw_dma(dwc->chan.device);
- u32 block;
-
- /* Always in bytes for iDMA 32-bit */
- if (dw->pdata->is_idma32)
- width = 0;
-
- if ((bytes >> width) > dwc->block_size) {
- block = dwc->block_size;
- *len = block << width;
- } else {
- block = bytes >> width;
- *len = bytes;
- }
-
- return block;
-}
-
-static size_t block2bytes(struct dw_dma_chan *dwc, u32 block, u32 width)
-{
- struct dw_dma *dw = to_dw_dma(dwc->chan.device);
-
- if (dw->pdata->is_idma32)
- return IDMA32C_CTLH_BLOCK_TS(block);
-
- return DWC_CTLH_BLOCK_TS(block) << width;
-}
-
/*----------------------------------------------------------------------*/
/* Perform single block transfer */
@@ -391,10 +319,11 @@ static void dwc_complete_all(struct dw_dma *dw, struct dw_dma_chan *dwc)
/* Returns how many bytes were already received from source */
static inline u32 dwc_get_sent(struct dw_dma_chan *dwc)
{
+ struct dw_dma *dw = to_dw_dma(dwc->chan.device);
u32 ctlhi = channel_readl(dwc, CTL_HI);
u32 ctllo = channel_readl(dwc, CTL_LO);
- return block2bytes(dwc, ctlhi, ctllo >> 4 & 7);
+ return dw->block2bytes(dwc, ctlhi, ctllo >> 4 & 7);
}
static void dwc_scan_descriptors(struct dw_dma *dw, struct dw_dma_chan *dwc)
@@ -651,7 +580,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
unsigned int src_width;
unsigned int dst_width;
unsigned int data_width = dw->pdata->data_width[m_master];
- u32 ctllo;
+ u32 ctllo, ctlhi;
u8 lms = DWC_LLP_LMS(m_master);
dev_vdbg(chan2dev(chan),
@@ -680,10 +609,12 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
if (!desc)
goto err_desc_get;
+ ctlhi = dw->bytes2block(dwc, len - offset, src_width, &xfer_count);
+
lli_write(desc, sar, src + offset);
lli_write(desc, dar, dest + offset);
lli_write(desc, ctllo, ctllo);
- lli_write(desc, ctlhi, bytes2block(dwc, len - offset, src_width, &xfer_count));
+ lli_write(desc, ctlhi, ctlhi);
desc->len = xfer_count;
if (!first) {
@@ -721,7 +652,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
struct dma_slave_config *sconfig = &dwc->dma_sconfig;
struct dw_desc *prev;
struct dw_desc *first;
- u32 ctllo;
+ u32 ctllo, ctlhi;
u8 m_master = dwc->dws.m_master;
u8 lms = DWC_LLP_LMS(m_master);
dma_addr_t reg;
@@ -768,9 +699,11 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
if (!desc)
goto err_desc_get;
+ ctlhi = dw->bytes2block(dwc, len, mem_width, &dlen);
+
lli_write(desc, sar, mem);
lli_write(desc, dar, reg);
- lli_write(desc, ctlhi, bytes2block(dwc, len, mem_width, &dlen));
+ lli_write(desc, ctlhi, ctlhi);
lli_write(desc, ctllo, ctllo | DWC_CTLL_SRC_WIDTH(mem_width));
desc->len = dlen;
@@ -814,9 +747,11 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
if (!desc)
goto err_desc_get;
+ ctlhi = dw->bytes2block(dwc, len, reg_width, &dlen);
+
lli_write(desc, sar, reg);
lli_write(desc, dar, mem);
- lli_write(desc, ctlhi, bytes2block(dwc, len, reg_width, &dlen));
+ lli_write(desc, ctlhi, ctlhi);
mem_width = __ffs(data_width | mem | dlen);
lli_write(desc, ctllo, ctllo | DWC_CTLL_DST_WIDTH(mem_width));
desc->len = dlen;
@@ -876,22 +811,12 @@ EXPORT_SYMBOL_GPL(dw_dma_filter);
static int dwc_config(struct dma_chan *chan, struct dma_slave_config *sconfig)
{
struct dw_dma_chan *dwc = to_dw_dma_chan(chan);
- struct dma_slave_config *sc = &dwc->dma_sconfig;
struct dw_dma *dw = to_dw_dma(chan->device);
- /*
- * Fix sconfig's burst size according to dw_dmac. We need to convert
- * them as:
- * 1 -> 0, 4 -> 1, 8 -> 2, 16 -> 3.
- *
- * NOTE: burst size 2 is not supported by DesignWare controller.
- * iDMA 32-bit supports it.
- */
- u32 s = dw->pdata->is_idma32 ? 1 : 2;
memcpy(&dwc->dma_sconfig, sconfig, sizeof(*sconfig));
- sc->src_maxburst = sc->src_maxburst > 1 ? fls(sc->src_maxburst) - s : 0;
- sc->dst_maxburst = sc->dst_maxburst > 1 ? fls(sc->dst_maxburst) - s : 0;
+ dw->encode_maxburst(dwc, &dwc->dma_sconfig.src_maxburst);
+ dw->encode_maxburst(dwc, &dwc->dma_sconfig.dst_maxburst);
return 0;
}
@@ -900,16 +825,9 @@ static void dwc_chan_pause(struct dw_dma_chan *dwc, bool drain)
{
struct dw_dma *dw = to_dw_dma(dwc->chan.device);
unsigned int count = 20; /* timeout iterations */
- u32 cfglo;
- cfglo = channel_readl(dwc, CFG_LO);
- if (dw->pdata->is_idma32) {
- if (drain)
- cfglo |= IDMA32C_CFGL_CH_DRAIN;
- else
- cfglo &= ~IDMA32C_CFGL_CH_DRAIN;
- }
- channel_writel(dwc, CFG_LO, cfglo | DWC_CFGL_CH_SUSP);
+ dw->suspend_chan(dwc, drain);
+
while (!(channel_readl(dwc, CFG_LO) & DWC_CFGL_FIFO_EMPTY) && count--)
udelay(2);
@@ -1058,33 +976,7 @@ static void dwc_issue_pending(struct dma_chan *chan)
/*----------------------------------------------------------------------*/
-/*
- * Program FIFO size of channels.
- *
- * By default full FIFO (512 bytes) is assigned to channel 0. Here we
- * slice FIFO on equal parts between channels.
- */
-static void idma32_fifo_partition(struct dw_dma *dw)
-{
- u64 value = IDMA32C_FP_PSIZE_CH0(64) | IDMA32C_FP_PSIZE_CH1(64) |
- IDMA32C_FP_UPDATE;
- u64 fifo_partition = 0;
-
- if (!dw->pdata->is_idma32)
- return;
-
- /* Fill FIFO_PARTITION low bits (Channels 0..1, 4..5) */
- fifo_partition |= value << 0;
-
- /* Fill FIFO_PARTITION high bits (Channels 2..3, 6..7) */
- fifo_partition |= value << 32;
-
- /* Program FIFO Partition registers - 64 bytes per channel */
- idma32_writeq(dw, FIFO_PARTITION1, fifo_partition);
- idma32_writeq(dw, FIFO_PARTITION0, fifo_partition);
-}
-
-static void dw_dma_off(struct dw_dma *dw)
+void do_dw_dma_off(struct dw_dma *dw)
{
unsigned int i;
@@ -1103,7 +995,7 @@ static void dw_dma_off(struct dw_dma *dw)
clear_bit(DW_DMA_IS_INITIALIZED, &dw->chan[i].flags);
}
-static void dw_dma_on(struct dw_dma *dw)
+void do_dw_dma_on(struct dw_dma *dw)
{
dma_writel(dw, CFG, DW_CFG_DMA_EN);
}
@@ -1139,7 +1031,7 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan)
/* Enable controller here if needed */
if (!dw->in_use)
- dw_dma_on(dw);
+ do_dw_dma_on(dw);
dw->in_use |= dwc->mask;
return 0;
@@ -1177,30 +1069,25 @@ static void dwc_free_chan_resources(struct dma_chan *chan)
/* Disable controller in case it was a last user */
dw->in_use &= ~dwc->mask;
if (!dw->in_use)
- dw_dma_off(dw);
+ do_dw_dma_off(dw);
dev_vdbg(chan2dev(chan), "%s: done\n", __func__);
}
-int dw_dma_probe(struct dw_dma_chip *chip)
+int do_dma_probe(struct dw_dma_chip *chip)
{
+ struct dw_dma *dw = chip->dw;
struct dw_dma_platform_data *pdata;
- struct dw_dma *dw;
bool autocfg = false;
unsigned int dw_params;
unsigned int i;
int err;
- dw = devm_kzalloc(chip->dev, sizeof(*dw), GFP_KERNEL);
- if (!dw)
- return -ENOMEM;
-
dw->pdata = devm_kzalloc(chip->dev, sizeof(*dw->pdata), GFP_KERNEL);
if (!dw->pdata)
return -ENOMEM;
dw->regs = chip->regs;
- chip->dw = dw;
pm_runtime_get_sync(chip->dev);
@@ -1250,15 +1137,10 @@ int dw_dma_probe(struct dw_dma_chip *chip)
dw->all_chan_mask = (1 << pdata->nr_channels) - 1;
/* Force dma off, just in case */
- dw_dma_off(dw);
-
- idma32_fifo_partition(dw);
+ dw->disable(dw);
/* Device and instance ID for IRQ and DMA pool */
- if (pdata->is_idma32)
- snprintf(dw->name, sizeof(dw->name), "idma32:dmac%d", chip->id);
- else
- snprintf(dw->name, sizeof(dw->name), "dw:dmac%d", chip->id);
+ dw->set_device_name(dw, chip->id);
/* Create a pool of consistent memory blocks for hardware descriptors */
dw->desc_pool = dmam_pool_create(dw->name, chip->dev,
@@ -1380,16 +1262,15 @@ int dw_dma_probe(struct dw_dma_chip *chip)
pm_runtime_put_sync_suspend(chip->dev);
return err;
}
-EXPORT_SYMBOL_GPL(dw_dma_probe);
-int dw_dma_remove(struct dw_dma_chip *chip)
+int do_dma_remove(struct dw_dma_chip *chip)
{
struct dw_dma *dw = chip->dw;
struct dw_dma_chan *dwc, *_dwc;
pm_runtime_get_sync(chip->dev);
- dw_dma_off(dw);
+ do_dw_dma_off(dw);
dma_async_device_unregister(&dw->dma);
free_irq(chip->irq, dw);
@@ -1404,27 +1285,24 @@ int dw_dma_remove(struct dw_dma_chip *chip)
pm_runtime_put_sync_suspend(chip->dev);
return 0;
}
-EXPORT_SYMBOL_GPL(dw_dma_remove);
-int dw_dma_disable(struct dw_dma_chip *chip)
+int do_dw_dma_disable(struct dw_dma_chip *chip)
{
struct dw_dma *dw = chip->dw;
- dw_dma_off(dw);
+ dw->disable(dw);
return 0;
}
-EXPORT_SYMBOL_GPL(dw_dma_disable);
+EXPORT_SYMBOL_GPL(do_dw_dma_disable);
-int dw_dma_enable(struct dw_dma_chip *chip)
+int do_dw_dma_enable(struct dw_dma_chip *chip)
{
struct dw_dma *dw = chip->dw;
- idma32_fifo_partition(dw);
-
- dw_dma_on(dw);
+ dw->enable(dw);
return 0;
}
-EXPORT_SYMBOL_GPL(dw_dma_enable);
+EXPORT_SYMBOL_GPL(do_dw_dma_enable);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller core driver");
diff --git a/drivers/dma/dw/dw.c b/drivers/dma/dw/dw.c
new file mode 100644
index 000000000000..977aa28bf81d
--- /dev/null
+++ b/drivers/dma/dw/dw.c
@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2007-2008 Atmel Corporation
+// Copyright (C) 2010-2011 ST Microelectronics
+// Copyright (C) 2013,2018 Intel Corporation
+
+#include <linux/bitops.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include "internal.h"
+
+static void dw_dma_initialize_chan(struct dw_dma_chan *dwc)
+{
+ struct dw_dma *dw = to_dw_dma(dwc->chan.device);
+ u32 cfghi = DWC_CFGH_FIFO_MODE;
+ u32 cfglo = DWC_CFGL_CH_PRIOR(dwc->priority);
+ bool hs_polarity = dwc->dws.hs_polarity;
+
+ cfghi |= DWC_CFGH_DST_PER(dwc->dws.dst_id);
+ cfghi |= DWC_CFGH_SRC_PER(dwc->dws.src_id);
+ cfghi |= DWC_CFGH_PROTCTL(dw->pdata->protctl);
+
+ /* Set polarity of handshake interface */
+ cfglo |= hs_polarity ? DWC_CFGL_HS_DST_POL | DWC_CFGL_HS_SRC_POL : 0;
+
+ channel_writel(dwc, CFG_LO, cfglo);
+ channel_writel(dwc, CFG_HI, cfghi);
+}
+
+static void dw_dma_suspend_chan(struct dw_dma_chan *dwc, bool drain)
+{
+ u32 cfglo = channel_readl(dwc, CFG_LO);
+
+ channel_writel(dwc, CFG_LO, cfglo | DWC_CFGL_CH_SUSP);
+}
+
+static u32 dw_dma_bytes2block(struct dw_dma_chan *dwc,
+ size_t bytes, unsigned int width, size_t *len)
+{
+ u32 block;
+
+ if ((bytes >> width) > dwc->block_size) {
+ block = dwc->block_size;
+ *len = dwc->block_size << width;
+ } else {
+ block = bytes >> width;
+ *len = bytes;
+ }
+
+ return block;
+}
+
+static size_t dw_dma_block2bytes(struct dw_dma_chan *dwc, u32 block, u32 width)
+{
+ return DWC_CTLH_BLOCK_TS(block) << width;
+}
+
+static void dw_dma_encode_maxburst(struct dw_dma_chan *dwc, u32 *maxburst)
+{
+ /*
+ * Fix burst size according to dw_dmac. We need to convert them as:
+ * 1 -> 0, 4 -> 1, 8 -> 2, 16 -> 3.
+ */
+ *maxburst = *maxburst > 1 ? fls(*maxburst) - 2 : 0;
+}
+
+static void dw_dma_set_device_name(struct dw_dma *dw, int id)
+{
+ snprintf(dw->name, sizeof(dw->name), "dw:dmac%d", id);
+}
+
+static void dw_dma_disable(struct dw_dma *dw)
+{
+ do_dw_dma_off(dw);
+}
+
+static void dw_dma_enable(struct dw_dma *dw)
+{
+ do_dw_dma_on(dw);
+}
+
+int dw_dma_probe(struct dw_dma_chip *chip)
+{
+ struct dw_dma *dw;
+
+ dw = devm_kzalloc(chip->dev, sizeof(*dw), GFP_KERNEL);
+ if (!dw)
+ return -ENOMEM;
+
+ /* Channel operations */
+ dw->initialize_chan = dw_dma_initialize_chan;
+ dw->suspend_chan = dw_dma_suspend_chan;
+ dw->encode_maxburst = dw_dma_encode_maxburst;
+ dw->bytes2block = dw_dma_bytes2block;
+ dw->block2bytes = dw_dma_block2bytes;
+
+ /* Device operations */
+ dw->set_device_name = dw_dma_set_device_name;
+ dw->disable = dw_dma_disable;
+ dw->enable = dw_dma_enable;
+
+ chip->dw = dw;
+ return do_dma_probe(chip);
+}
+EXPORT_SYMBOL_GPL(dw_dma_probe);
+
+int dw_dma_remove(struct dw_dma_chip *chip)
+{
+ return do_dma_remove(chip);
+}
+EXPORT_SYMBOL_GPL(dw_dma_remove);
diff --git a/drivers/dma/dw/idma32.c b/drivers/dma/dw/idma32.c
new file mode 100644
index 000000000000..8707830f39ad
--- /dev/null
+++ b/drivers/dma/dw/idma32.c
@@ -0,0 +1,138 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2013,2018 Intel Corporation
+
+#include <linux/bitops.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include "internal.h"
+
+static void idma32_initialize_chan(struct dw_dma_chan *dwc)
+{
+ u32 cfghi = 0;
+ u32 cfglo = 0;
+
+ /* Set default burst alignment */
+ cfglo |= IDMA32C_CFGL_DST_BURST_ALIGN | IDMA32C_CFGL_SRC_BURST_ALIGN;
+
+ /* Low 4 bits of the request lines */
+ cfghi |= IDMA32C_CFGH_DST_PER(dwc->dws.dst_id & 0xf);
+ cfghi |= IDMA32C_CFGH_SRC_PER(dwc->dws.src_id & 0xf);
+
+ /* Request line extension (2 bits) */
+ cfghi |= IDMA32C_CFGH_DST_PER_EXT(dwc->dws.dst_id >> 4 & 0x3);
+ cfghi |= IDMA32C_CFGH_SRC_PER_EXT(dwc->dws.src_id >> 4 & 0x3);
+
+ channel_writel(dwc, CFG_LO, cfglo);
+ channel_writel(dwc, CFG_HI, cfghi);
+}
+
+static void idma32_suspend_chan(struct dw_dma_chan *dwc, bool drain)
+{
+ u32 cfglo = channel_readl(dwc, CFG_LO);
+
+ if (drain)
+ cfglo |= IDMA32C_CFGL_CH_DRAIN;
+ else
+ cfglo &= ~IDMA32C_CFGL_CH_DRAIN;
+
+ channel_writel(dwc, CFG_LO, cfglo | DWC_CFGL_CH_SUSP);
+}
+
+static u32 idma32_bytes2block(struct dw_dma_chan *dwc,
+ size_t bytes, unsigned int width, size_t *len)
+{
+ u32 block;
+
+ if (bytes > dwc->block_size) {
+ block = dwc->block_size;
+ *len = dwc->block_size;
+ } else {
+ block = bytes;
+ *len = bytes;
+ }
+
+ return block;
+}
+
+static size_t idma32_block2bytes(struct dw_dma_chan *dwc, u32 block, u32 width)
+{
+ return IDMA32C_CTLH_BLOCK_TS(block);
+}
+
+static void idma32_encode_maxburst(struct dw_dma_chan *dwc, u32 *maxburst)
+{
+ *maxburst = *maxburst > 1 ? fls(*maxburst) - 1 : 0;
+}
+
+static void idma32_set_device_name(struct dw_dma *dw, int id)
+{
+ snprintf(dw->name, sizeof(dw->name), "idma32:dmac%d", id);
+}
+
+/*
+ * Program FIFO size of channels.
+ *
+ * By default full FIFO (512 bytes) is assigned to channel 0. Here we
+ * slice FIFO on equal parts between channels.
+ */
+static void idma32_fifo_partition(struct dw_dma *dw)
+{
+ u64 value = IDMA32C_FP_PSIZE_CH0(64) | IDMA32C_FP_PSIZE_CH1(64) |
+ IDMA32C_FP_UPDATE;
+ u64 fifo_partition = 0;
+
+ /* Fill FIFO_PARTITION low bits (Channels 0..1, 4..5) */
+ fifo_partition |= value << 0;
+
+ /* Fill FIFO_PARTITION high bits (Channels 2..3, 6..7) */
+ fifo_partition |= value << 32;
+
+ /* Program FIFO Partition registers - 64 bytes per channel */
+ idma32_writeq(dw, FIFO_PARTITION1, fifo_partition);
+ idma32_writeq(dw, FIFO_PARTITION0, fifo_partition);
+}
+
+static void idma32_disable(struct dw_dma *dw)
+{
+ do_dw_dma_off(dw);
+ idma32_fifo_partition(dw);
+}
+
+static void idma32_enable(struct dw_dma *dw)
+{
+ idma32_fifo_partition(dw);
+ do_dw_dma_on(dw);
+}
+
+int idma32_dma_probe(struct dw_dma_chip *chip)
+{
+ struct dw_dma *dw;
+
+ dw = devm_kzalloc(chip->dev, sizeof(*dw), GFP_KERNEL);
+ if (!dw)
+ return -ENOMEM;
+
+ /* Channel operations */
+ dw->initialize_chan = idma32_initialize_chan;
+ dw->suspend_chan = idma32_suspend_chan;
+ dw->encode_maxburst = idma32_encode_maxburst;
+ dw->bytes2block = idma32_bytes2block;
+ dw->block2bytes = idma32_block2bytes;
+
+ /* Device operations */
+ dw->set_device_name = idma32_set_device_name;
+ dw->disable = idma32_disable;
+ dw->enable = idma32_enable;
+
+ chip->dw = dw;
+ return do_dma_probe(chip);
+}
+EXPORT_SYMBOL_GPL(idma32_dma_probe);
+
+int idma32_dma_remove(struct dw_dma_chip *chip)
+{
+ return do_dma_remove(chip);
+}
+EXPORT_SYMBOL_GPL(idma32_dma_remove);
diff --git a/drivers/dma/dw/internal.h b/drivers/dma/dw/internal.h
index 41439732ff6b..fdcac21ea665 100644
--- a/drivers/dma/dw/internal.h
+++ b/drivers/dma/dw/internal.h
@@ -15,8 +15,14 @@
#include "regs.h"
-int dw_dma_disable(struct dw_dma_chip *chip);
-int dw_dma_enable(struct dw_dma_chip *chip);
+int do_dma_probe(struct dw_dma_chip *chip);
+int do_dma_remove(struct dw_dma_chip *chip);
+
+void do_dw_dma_on(struct dw_dma *dw);
+void do_dw_dma_off(struct dw_dma *dw);
+
+int do_dw_dma_disable(struct dw_dma_chip *chip);
+int do_dw_dma_enable(struct dw_dma_chip *chip);
extern bool dw_dma_filter(struct dma_chan *chan, void *param);
diff --git a/drivers/dma/dw/pci.c b/drivers/dma/dw/pci.c
index 66d98d7ccad0..e9ba25b4f950 100644
--- a/drivers/dma/dw/pci.c
+++ b/drivers/dma/dw/pci.c
@@ -15,9 +15,17 @@
#include "internal.h"
-static struct dw_dma_platform_data mrfld_pdata = {
+struct dw_dma_pci_data {
+ const struct dw_dma_platform_data *pdata;
+ int (*probe)(struct dw_dma_chip *chip);
+};
+
+static const struct dw_dma_pci_data dw_pci_data = {
+ .probe = dw_dma_probe,
+};
+
+static const struct dw_dma_platform_data idma32_pdata = {
.nr_channels = 8,
- .is_idma32 = true,
.chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
.chan_priority = CHAN_PRIORITY_ASCENDING,
.block_size = 131071,
@@ -26,9 +34,14 @@ static struct dw_dma_platform_data mrfld_pdata = {
.multi_block = {1, 1, 1, 1, 1, 1, 1, 1},
};
+static const struct dw_dma_pci_data idma32_pci_data = {
+ .pdata = &idma32_pdata,
+ .probe = idma32_dma_probe,
+};
+
static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
{
- const struct dw_dma_platform_data *pdata = (void *)pid->driver_data;
+ const struct dw_dma_pci_data *data = (void *)pid->driver_data;
struct dw_dma_chip *chip;
int ret;
@@ -61,9 +74,9 @@ static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
chip->id = pdev->devfn;
chip->regs = pcim_iomap_table(pdev)[0];
chip->irq = pdev->irq;
- chip->pdata = pdata;
+ chip->pdata = data->pdata;
- ret = dw_dma_probe(chip);
+ ret = data->probe(chip);
if (ret)
return ret;
@@ -89,7 +102,7 @@ static int dw_pci_suspend_late(struct device *dev)
struct pci_dev *pci = to_pci_dev(dev);
struct dw_dma_chip *chip = pci_get_drvdata(pci);
- return dw_dma_disable(chip);
+ return do_dw_dma_disable(chip);
};
static int dw_pci_resume_early(struct device *dev)
@@ -97,7 +110,7 @@ static int dw_pci_resume_early(struct device *dev)
struct pci_dev *pci = to_pci_dev(dev);
struct dw_dma_chip *chip = pci_get_drvdata(pci);
- return dw_dma_enable(chip);
+ return do_dw_dma_enable(chip);
};
#endif /* CONFIG_PM_SLEEP */
@@ -108,24 +121,24 @@ static const struct dev_pm_ops dw_pci_dev_pm_ops = {
static const struct pci_device_id dw_pci_id_table[] = {
/* Medfield (GPDMA) */
- { PCI_VDEVICE(INTEL, 0x0827) },
+ { PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_pci_data },
/* BayTrail */
- { PCI_VDEVICE(INTEL, 0x0f06) },
- { PCI_VDEVICE(INTEL, 0x0f40) },
+ { PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_pci_data },
+ { PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_pci_data },
- /* Merrifield iDMA 32-bit (GPDMA) */
- { PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&mrfld_pdata },
+ /* Merrifield */
+ { PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&idma32_pci_data },
/* Braswell */
- { PCI_VDEVICE(INTEL, 0x2286) },
- { PCI_VDEVICE(INTEL, 0x22c0) },
+ { PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_pci_data },
+ { PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_pci_data },
/* Haswell */
- { PCI_VDEVICE(INTEL, 0x9c60) },
+ { PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_pci_data },
/* Broadwell */
- { PCI_VDEVICE(INTEL, 0x9ce0) },
+ { PCI_VDEVICE(INTEL, 0x9ce0), (kernel_ulong_t)&dw_pci_data },
{ }
};
diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c
index 58fc1ba02a1e..d5196c97e4f4 100644
--- a/drivers/dma/dw/platform.c
+++ b/drivers/dma/dw/platform.c
@@ -255,7 +255,7 @@ static void dw_shutdown(struct platform_device *pdev)
struct dw_dma_chip *chip = platform_get_drvdata(pdev);
/*
- * We have to call dw_dma_disable() to stop any ongoing transfer. On
+ * We have to call do_dw_dma_disable() to stop any ongoing transfer. On
* some platforms we can't do that since DMA device is powered off.
* Moreover we have no possibility to check if the platform is affected
* or not. That's why we call pm_runtime_get_sync() / pm_runtime_put()
@@ -264,7 +264,7 @@ static void dw_shutdown(struct platform_device *pdev)
* used by the driver.
*/
pm_runtime_get_sync(chip->dev);
- dw_dma_disable(chip);
+ do_dw_dma_disable(chip);
pm_runtime_put_sync_suspend(chip->dev);
clk_disable_unprepare(chip->clk);
@@ -294,7 +294,7 @@ static int dw_suspend_late(struct device *dev)
{
struct dw_dma_chip *chip = dev_get_drvdata(dev);
- dw_dma_disable(chip);
+ do_dw_dma_disable(chip);
clk_disable_unprepare(chip->clk);
return 0;
@@ -309,7 +309,7 @@ static int dw_resume_early(struct device *dev)
if (ret)
return ret;
- return dw_dma_enable(chip);
+ return do_dw_dma_enable(chip);
}
#endif /* CONFIG_PM_SLEEP */
diff --git a/drivers/dma/dw/regs.h b/drivers/dma/dw/regs.h
index 646c9c960c07..66aa8b227248 100644
--- a/drivers/dma/dw/regs.h
+++ b/drivers/dma/dw/regs.h
@@ -312,6 +312,19 @@ struct dw_dma {
u8 all_chan_mask;
u8 in_use;
+ /* Channel operations */
+ void (*initialize_chan)(struct dw_dma_chan *dwc);
+ void (*suspend_chan)(struct dw_dma_chan *dwc, bool drain);
+ void (*encode_maxburst)(struct dw_dma_chan *dwc, u32 *maxburst);
+ u32 (*bytes2block)(struct dw_dma_chan *dwc, size_t bytes,
+ unsigned int width, size_t *len);
+ size_t (*block2bytes)(struct dw_dma_chan *dwc, u32 block, u32 width);
+
+ /* Device operations */
+ void (*set_device_name)(struct dw_dma *dw, int id);
+ void (*disable)(struct dw_dma *dw);
+ void (*enable)(struct dw_dma *dw);
+
/* platform data */
struct dw_dma_platform_data *pdata;
};
diff --git a/include/linux/dma/dw.h b/include/linux/dma/dw.h
index e166cac8e870..d643d331c20e 100644
--- a/include/linux/dma/dw.h
+++ b/include/linux/dma/dw.h
@@ -45,9 +45,13 @@ struct dw_dma_chip {
#if IS_ENABLED(CONFIG_DW_DMAC_CORE)
int dw_dma_probe(struct dw_dma_chip *chip);
int dw_dma_remove(struct dw_dma_chip *chip);
+int idma32_dma_probe(struct dw_dma_chip *chip);
+int idma32_dma_remove(struct dw_dma_chip *chip);
#else
static inline int dw_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
static inline int dw_dma_remove(struct dw_dma_chip *chip) { return 0; }
+static inline int idma32_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
+static inline int idma32_dma_remove(struct dw_dma_chip *chip) { return 0; }
#endif /* CONFIG_DW_DMAC_CORE */
#endif /* _DMA_DW_H */
diff --git a/include/linux/platform_data/dma-dw.h b/include/linux/platform_data/dma-dw.h
index 1c85eeee4171..576048433809 100644
--- a/include/linux/platform_data/dma-dw.h
+++ b/include/linux/platform_data/dma-dw.h
@@ -38,7 +38,6 @@ struct dw_dma_slave {
/**
* struct dw_dma_platform_data - Controller configuration parameters
* @nr_channels: Number of channels supported by hardware (max 8)
- * @is_idma32: The type of the DMA controller is iDMA32
* @chan_allocation_order: Allocate channels starting from 0 or 7
* @chan_priority: Set channel priority increasing from 0 to 7 or 7 to 0.
* @block_size: Maximum block size supported by the controller
@@ -50,7 +49,6 @@ struct dw_dma_slave {
*/
struct dw_dma_platform_data {
unsigned int nr_channels;
- bool is_idma32;
#define CHAN_ALLOCATION_ASCENDING 0 /* zero to seven */
#define CHAN_ALLOCATION_DESCENDING 1 /* seven to zero */
unsigned char chan_allocation_order;
--
2.19.2
