korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-25 21:24:08 +08:00
Code Issues Packages Projects Releases Wiki Activity

Merge branch 'topic/jz' into for-linus

Browse Source
This commit is contained in:
Vinod Koul 2018-10-24 09:16:04 +01:00
commit 81c3ee027e
6 changed files with 262 additions and 85 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
Documentation/devicetree/bindings/dma/jz4780-dma.txt
View File

@ -2,8 +2,13 @@
Required properties:
- compatible: Should be "ingenic,jz4780-dma"
- reg: Should contain the DMA controller registers location and length.
- compatible: Should be one of:
* ingenic,jz4740-dma
* ingenic,jz4725b-dma
* ingenic,jz4770-dma
* ingenic,jz4780-dma
- reg: Should contain the DMA channel registers location and length, followed
by the DMA controller registers location and length.
- interrupts: Should contain the interrupt specifier of the DMA controller.
- clocks: Should contain a clock specifier for the JZ4780 PDMA clock.
- #dma-cells: Must be <2>. Number of integer cells in the dmas property of
@ -19,9 +24,10 @@ Optional properties:
Example:
dma: dma@13420000 {
dma: dma-controller@13420000 {
compatible = "ingenic,jz4780-dma";
reg = <0x13420000 0x10000>;
reg = <0x13420000 0x400
0x13421000 0x40>;
interrupt-parent = <&intc>;
interrupts = <10>;

15
arch/mips/boot/dts/ingenic/jz4740.dtsi
View File

@ -154,6 +154,21 @@
clock-names = "baud", "module";
};
dmac: dma-controller@13020000 {
compatible = "ingenic,jz4740-dma";
reg = <0x13020000 0xbc
0x13020300 0x14>;
#dma-cells = <2>;
interrupt-parent = <&intc>;
interrupts = <29>;
clocks = <&cgu JZ4740_CLK_DMA>;
/* Disable dmac until we have something that uses it */
status = "disabled";
};
uhc: uhc@13030000 {
compatible = "ingenic,jz4740-ohci", "generic-ohci";
reg = <0x13030000 0x1000>;

30
arch/mips/boot/dts/ingenic/jz4770.dtsi
View File

@ -196,6 +196,36 @@
status = "disabled";
};
dmac0: dma-controller@13420000 {
compatible = "ingenic,jz4770-dma";
reg = <0x13420000 0xC0
0x13420300 0x20>;
#dma-cells = <1>;
clocks = <&cgu JZ4770_CLK_DMA>;
interrupt-parent = <&intc>;
interrupts = <24>;
/* Disable dmac0 until we have something that uses it */
status = "disabled";
};
dmac1: dma-controller@13420100 {
compatible = "ingenic,jz4770-dma";
reg = <0x13420100 0xC0
0x13420400 0x20>;
#dma-cells = <1>;
clocks = <&cgu JZ4770_CLK_DMA>;
interrupt-parent = <&intc>;
interrupts = <23>;
/* Disable dmac1 until we have something that uses it */
status = "disabled";
};
uhc: uhc@13430000 {
compatible = "generic-ohci";
reg = <0x13430000 0x1000>;

3
arch/mips/boot/dts/ingenic/jz4780.dtsi
View File

@ -266,7 +266,8 @@
dma: dma@13420000 {
compatible = "ingenic,jz4780-dma";
reg = <0x13420000 0x10000>;
reg = <0x13420000 0x400
0x13421000 0x40>;
#dma-cells = <2>;
interrupt-parent = <&intc>;

2
drivers/dma/Kconfig
View File

@ -143,7 +143,7 @@ config DMA_JZ4740
config DMA_JZ4780
tristate "JZ4780 DMA support"
depends on MACH_JZ4780 || COMPILE_TEST
depends on MIPS || COMPILE_TEST
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
help

283
drivers/dma/dma-jz4780.c
View File

@ -16,6 +16,7 @@
#include <linux/interrupt.h>
#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/slab.h>
@ -23,33 +24,35 @@
#include "dmaengine.h"
#include "virt-dma.h"
#define JZ_DMA_NR_CHANNELS 32
/* Global registers. */
#define JZ_DMA_REG_DMAC 0x1000
#define JZ_DMA_REG_DIRQP 0x1004
#define JZ_DMA_REG_DDR 0x1008
#define JZ_DMA_REG_DDRS 0x100c
#define JZ_DMA_REG_DMACP 0x101c
#define JZ_DMA_REG_DSIRQP 0x1020
#define JZ_DMA_REG_DSIRQM 0x1024
#define JZ_DMA_REG_DCIRQP 0x1028
#define JZ_DMA_REG_DCIRQM 0x102c
#define JZ_DMA_REG_DMAC 0x00
#define JZ_DMA_REG_DIRQP 0x04
#define JZ_DMA_REG_DDR 0x08
#define JZ_DMA_REG_DDRS 0x0c
#define JZ_DMA_REG_DCKE 0x10
#define JZ_DMA_REG_DCKES 0x14
#define JZ_DMA_REG_DCKEC 0x18
#define JZ_DMA_REG_DMACP 0x1c
#define JZ_DMA_REG_DSIRQP 0x20
#define JZ_DMA_REG_DSIRQM 0x24
#define JZ_DMA_REG_DCIRQP 0x28
#define JZ_DMA_REG_DCIRQM 0x2c
/* Per-channel registers. */
#define JZ_DMA_REG_CHAN(n) (n * 0x20)
#define JZ_DMA_REG_DSA(n) (0x00 + JZ_DMA_REG_CHAN(n))
#define JZ_DMA_REG_DTA(n) (0x04 + JZ_DMA_REG_CHAN(n))
#define JZ_DMA_REG_DTC(n) (0x08 + JZ_DMA_REG_CHAN(n))
#define JZ_DMA_REG_DRT(n) (0x0c + JZ_DMA_REG_CHAN(n))
#define JZ_DMA_REG_DCS(n) (0x10 + JZ_DMA_REG_CHAN(n))
#define JZ_DMA_REG_DCM(n) (0x14 + JZ_DMA_REG_CHAN(n))
#define JZ_DMA_REG_DDA(n) (0x18 + JZ_DMA_REG_CHAN(n))
#define JZ_DMA_REG_DSD(n) (0x1c + JZ_DMA_REG_CHAN(n))
#define JZ_DMA_REG_DSA 0x00
#define JZ_DMA_REG_DTA 0x04
#define JZ_DMA_REG_DTC 0x08
#define JZ_DMA_REG_DRT 0x0c
#define JZ_DMA_REG_DCS 0x10
#define JZ_DMA_REG_DCM 0x14
#define JZ_DMA_REG_DDA 0x18
#define JZ_DMA_REG_DSD 0x1c
#define JZ_DMA_DMAC_DMAE BIT(0)
#define JZ_DMA_DMAC_AR BIT(2)
#define JZ_DMA_DMAC_HLT BIT(3)
#define JZ_DMA_DMAC_FAIC BIT(27)
#define JZ_DMA_DMAC_FMSC BIT(31)
#define JZ_DMA_DRT_AUTO 0x8
@ -86,6 +89,14 @@
BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
BIT(DMA_SLAVE_BUSWIDTH_4_BYTES))
#define JZ4780_DMA_CTRL_OFFSET 0x1000
/* macros for use with jz4780_dma_soc_data.flags */
#define JZ_SOC_DATA_ALLOW_LEGACY_DT BIT(0)
#define JZ_SOC_DATA_PROGRAMMABLE_DMA BIT(1)
#define JZ_SOC_DATA_PER_CHAN_PM BIT(2)
#define JZ_SOC_DATA_NO_DCKES_DCKEC BIT(3)
/**
* struct jz4780_dma_hwdesc - descriptor structure read by the DMA controller.
* @dcm: value for the DCM (channel command) register
@ -94,17 +105,12 @@
* @dtc: transfer count (number of blocks of the transfer size specified in DCM
* to transfer) in the low 24 bits, offset of the next descriptor from the
* descriptor base address in the upper 8 bits.
* @sd: target/source stride difference (in stride transfer mode).
* @drt: request type
*/
struct jz4780_dma_hwdesc {
uint32_t dcm;
uint32_t dsa;
uint32_t dta;
uint32_t dtc;
uint32_t sd;
uint32_t drt;
uint32_t reserved[2];
};
/* Size of allocations for hardware descriptor blocks. */
@ -135,14 +141,22 @@ struct jz4780_dma_chan {
unsigned int curr_hwdesc;
};
struct jz4780_dma_soc_data {
unsigned int nb_channels;
unsigned int transfer_ord_max;
unsigned long flags;
};
struct jz4780_dma_dev {
struct dma_device dma_device;
void __iomem *base;
void __iomem *chn_base;
void __iomem *ctrl_base;
struct clk *clk;
unsigned int irq;
const struct jz4780_dma_soc_data *soc_data;
uint32_t chan_reserved;
struct jz4780_dma_chan chan[JZ_DMA_NR_CHANNELS];
struct jz4780_dma_chan chan[];
};
struct jz4780_dma_filter_data {
@ -169,16 +183,51 @@ static inline struct jz4780_dma_dev *jz4780_dma_chan_parent(
dma_device);
}
static inline uint32_t jz4780_dma_readl(struct jz4780_dma_dev *jzdma,
unsigned int reg)
static inline uint32_t jz4780_dma_chn_readl(struct jz4780_dma_dev *jzdma,
unsigned int chn, unsigned int reg)
{
return readl(jzdma->base + reg);
return readl(jzdma->chn_base + reg + JZ_DMA_REG_CHAN(chn));
}
static inline void jz4780_dma_writel(struct jz4780_dma_dev *jzdma,
static inline void jz4780_dma_chn_writel(struct jz4780_dma_dev *jzdma,
unsigned int chn, unsigned int reg, uint32_t val)
{
writel(val, jzdma->chn_base + reg + JZ_DMA_REG_CHAN(chn));
}
static inline uint32_t jz4780_dma_ctrl_readl(struct jz4780_dma_dev *jzdma,
unsigned int reg)
{
return readl(jzdma->ctrl_base + reg);
}
static inline void jz4780_dma_ctrl_writel(struct jz4780_dma_dev *jzdma,
unsigned int reg, uint32_t val)
{
writel(val, jzdma->base + reg);
writel(val, jzdma->ctrl_base + reg);
}
static inline void jz4780_dma_chan_enable(struct jz4780_dma_dev *jzdma,
unsigned int chn)
{
if (jzdma->soc_data->flags & JZ_SOC_DATA_PER_CHAN_PM) {
unsigned int reg;
if (jzdma->soc_data->flags & JZ_SOC_DATA_NO_DCKES_DCKEC)
reg = JZ_DMA_REG_DCKE;
else
reg = JZ_DMA_REG_DCKES;
jz4780_dma_ctrl_writel(jzdma, reg, BIT(chn));
}
}
static inline void jz4780_dma_chan_disable(struct jz4780_dma_dev *jzdma,
unsigned int chn)
{
if ((jzdma->soc_data->flags & JZ_SOC_DATA_PER_CHAN_PM) &&
!(jzdma->soc_data->flags & JZ_SOC_DATA_NO_DCKES_DCKEC))
jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DCKEC, BIT(chn));
}
static struct jz4780_dma_desc *jz4780_dma_desc_alloc(
@ -215,8 +264,10 @@ static void jz4780_dma_desc_free(struct virt_dma_desc *vdesc)
kfree(desc);
}
static uint32_t jz4780_dma_transfer_size(unsigned long val, uint32_t *shift)
static uint32_t jz4780_dma_transfer_size(struct jz4780_dma_chan *jzchan,
unsigned long val, uint32_t *shift)
{
struct jz4780_dma_dev *jzdma = jz4780_dma_chan_parent(jzchan);
int ord = ffs(val) - 1;
/*
@ -228,8 +279,8 @@ static uint32_t jz4780_dma_transfer_size(unsigned long val, uint32_t *shift)
*/
if (ord == 3)
ord = 2;
else if (ord > 7)
ord = 7;
else if (ord > jzdma->soc_data->transfer_ord_max)
ord = jzdma->soc_data->transfer_ord_max;
*shift = ord;
@ -262,7 +313,6 @@ static int jz4780_dma_setup_hwdesc(struct jz4780_dma_chan *jzchan,
desc->dcm = JZ_DMA_DCM_SAI;
desc->dsa = addr;
desc->dta = config->dst_addr;
desc->drt = jzchan->transfer_type;
width = config->dst_addr_width;
maxburst = config->dst_maxburst;
@ -270,7 +320,6 @@ static int jz4780_dma_setup_hwdesc(struct jz4780_dma_chan *jzchan,
desc->dcm = JZ_DMA_DCM_DAI;
desc->dsa = config->src_addr;
desc->dta = addr;
desc->drt = jzchan->transfer_type;
width = config->src_addr_width;
maxburst = config->src_maxburst;
@ -283,7 +332,7 @@ static int jz4780_dma_setup_hwdesc(struct jz4780_dma_chan *jzchan,
* divisible by the transfer size, and we must not use more than the
* maximum burst specified by the user.
*/
tsz = jz4780_dma_transfer_size(addr | len | (width * maxburst),
tsz = jz4780_dma_transfer_size(jzchan, addr | len | (width * maxburst),
&jzchan->transfer_shift);
switch (width) {
@ -412,12 +461,13 @@ static struct dma_async_tx_descriptor *jz4780_dma_prep_dma_memcpy(
if (!desc)
return NULL;
tsz = jz4780_dma_transfer_size(dest | src | len,
tsz = jz4780_dma_transfer_size(jzchan, dest | src | len,
&jzchan->transfer_shift);
jzchan->transfer_type = JZ_DMA_DRT_AUTO;
desc->desc[0].dsa = src;
desc->desc[0].dta = dest;
desc->desc[0].drt = JZ_DMA_DRT_AUTO;
desc->desc[0].dcm = JZ_DMA_DCM_TIE | JZ_DMA_DCM_SAI | JZ_DMA_DCM_DAI |
tsz << JZ_DMA_DCM_TSZ_SHIFT |
JZ_DMA_WIDTH_32_BIT << JZ_DMA_DCM_SP_SHIFT |
@ -472,18 +522,34 @@ static void jz4780_dma_begin(struct jz4780_dma_chan *jzchan)
(jzchan->curr_hwdesc + 1) % jzchan->desc->count;
}
/* Use 8-word descriptors. */
jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id), JZ_DMA_DCS_DES8);
/* Enable the channel's clock. */
jz4780_dma_chan_enable(jzdma, jzchan->id);
/* Use 4-word descriptors. */
jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DCS, 0);
/* Set transfer type. */
jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DRT,
jzchan->transfer_type);
/*
* Set the transfer count. This is redundant for a descriptor-driven
* transfer. However, there can be a delay between the transfer start
* time and when DTCn reg contains the new transfer count. Setting
* it explicitly ensures residue is computed correctly at all times.
*/
jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DTC,
jzchan->desc->desc[jzchan->curr_hwdesc].dtc);
/* Write descriptor address and initiate descriptor fetch. */
desc_phys = jzchan->desc->desc_phys +
(jzchan->curr_hwdesc * sizeof(*jzchan->desc->desc));
jz4780_dma_writel(jzdma, JZ_DMA_REG_DDA(jzchan->id), desc_phys);
jz4780_dma_writel(jzdma, JZ_DMA_REG_DDRS, BIT(jzchan->id));
jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DDA, desc_phys);
jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DDRS, BIT(jzchan->id));
/* Enable the channel. */
jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id),
JZ_DMA_DCS_DES8 | JZ_DMA_DCS_CTE);
jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DCS,
JZ_DMA_DCS_CTE);
}
static void jz4780_dma_issue_pending(struct dma_chan *chan)
@ -509,12 +575,14 @@ static int jz4780_dma_terminate_all(struct dma_chan *chan)
spin_lock_irqsave(&jzchan->vchan.lock, flags);
/* Clear the DMA status and stop the transfer. */
jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id), 0);
jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DCS, 0);
if (jzchan->desc) {
vchan_terminate_vdesc(&jzchan->desc->vdesc);
jzchan->desc = NULL;
}
jz4780_dma_chan_disable(jzdma, jzchan->id);
vchan_get_all_descriptors(&jzchan->vchan, &head);
spin_unlock_irqrestore(&jzchan->vchan.lock, flags);
@ -526,8 +594,10 @@ static int jz4780_dma_terminate_all(struct dma_chan *chan)
static void jz4780_dma_synchronize(struct dma_chan *chan)
{
struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(chan);
struct jz4780_dma_dev *jzdma = jz4780_dma_chan_parent(jzchan);
vchan_synchronize(&jzchan->vchan);
jz4780_dma_chan_disable(jzdma, jzchan->id);
}
static int jz4780_dma_config(struct dma_chan *chan,
@ -549,21 +619,17 @@ static size_t jz4780_dma_desc_residue(struct jz4780_dma_chan *jzchan,
struct jz4780_dma_desc *desc, unsigned int next_sg)
{
struct jz4780_dma_dev *jzdma = jz4780_dma_chan_parent(jzchan);
unsigned int residue, count;
unsigned int count = 0;
unsigned int i;
residue = 0;
for (i = next_sg; i < desc->count; i++)
residue += desc->desc[i].dtc << jzchan->transfer_shift;
count += desc->desc[i].dtc & GENMASK(23, 0);
if (next_sg != 0) {
count = jz4780_dma_readl(jzdma,
JZ_DMA_REG_DTC(jzchan->id));
residue += count << jzchan->transfer_shift;
}
if (next_sg != 0)
count += jz4780_dma_chn_readl(jzdma, jzchan->id,
JZ_DMA_REG_DTC);
return residue;
return count << jzchan->transfer_shift;
}
static enum dma_status jz4780_dma_tx_status(struct dma_chan *chan,
@ -573,6 +639,7 @@ static enum dma_status jz4780_dma_tx_status(struct dma_chan *chan,
struct virt_dma_desc *vdesc;
enum dma_status status;
unsigned long flags;
unsigned long residue = 0;
status = dma_cookie_status(chan, cookie, txstate);
if ((status == DMA_COMPLETE) || (txstate == NULL))
@ -583,13 +650,13 @@ static enum dma_status jz4780_dma_tx_status(struct dma_chan *chan,
vdesc = vchan_find_desc(&jzchan->vchan, cookie);
if (vdesc) {
/* On the issued list, so hasn't been processed yet */
txstate->residue = jz4780_dma_desc_residue(jzchan,
residue = jz4780_dma_desc_residue(jzchan,
to_jz4780_dma_desc(vdesc), 0);
} else if (cookie == jzchan->desc->vdesc.tx.cookie) {
txstate->residue = jz4780_dma_desc_residue(jzchan, jzchan->desc,
(jzchan->curr_hwdesc + 1) % jzchan->desc->count);
} else
txstate->residue = 0;
residue = jz4780_dma_desc_residue(jzchan, jzchan->desc,
jzchan->curr_hwdesc + 1);
}
dma_set_residue(txstate, residue);
if (vdesc && jzchan->desc && vdesc == &jzchan->desc->vdesc
&& jzchan->desc->status & (JZ_DMA_DCS_AR | JZ_DMA_DCS_HLT))
@ -606,8 +673,8 @@ static void jz4780_dma_chan_irq(struct jz4780_dma_dev *jzdma,
spin_lock(&jzchan->vchan.lock);
dcs = jz4780_dma_readl(jzdma, JZ_DMA_REG_DCS(jzchan->id));
jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id), 0);
dcs = jz4780_dma_chn_readl(jzdma, jzchan->id, JZ_DMA_REG_DCS);
jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DCS, 0);
if (dcs & JZ_DMA_DCS_AR) {
dev_warn(&jzchan->vchan.chan.dev->device,
@ -646,9 +713,9 @@ static irqreturn_t jz4780_dma_irq_handler(int irq, void *data)
uint32_t pending, dmac;
int i;
pending = jz4780_dma_readl(jzdma, JZ_DMA_REG_DIRQP);
pending = jz4780_dma_ctrl_readl(jzdma, JZ_DMA_REG_DIRQP);
for (i = 0; i < JZ_DMA_NR_CHANNELS; i++) {
for (i = 0; i < jzdma->soc_data->nb_channels; i++) {
if (!(pending & (1<<i)))
continue;
@ -656,12 +723,12 @@ static irqreturn_t jz4780_dma_irq_handler(int irq, void *data)
}
/* Clear halt and address error status of all channels. */
dmac = jz4780_dma_readl(jzdma, JZ_DMA_REG_DMAC);
dmac = jz4780_dma_ctrl_readl(jzdma, JZ_DMA_REG_DMAC);
dmac &= ~(JZ_DMA_DMAC_HLT | JZ_DMA_DMAC_AR);
jz4780_dma_writel(jzdma, JZ_DMA_REG_DMAC, dmac);
jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DMAC, dmac);
/* Clear interrupt pending status. */
jz4780_dma_writel(jzdma, JZ_DMA_REG_DIRQP, 0);
jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DIRQP, 0);
return IRQ_HANDLED;
}
@ -728,7 +795,7 @@ static struct dma_chan *jz4780_of_dma_xlate(struct of_phandle_args *dma_spec,
data.channel = dma_spec->args[1];
if (data.channel > -1) {
if (data.channel >= JZ_DMA_NR_CHANNELS) {
if (data.channel >= jzdma->soc_data->nb_channels) {
dev_err(jzdma->dma_device.dev,
"device requested non-existent channel %u\n",
data.channel);
@ -755,16 +822,29 @@ static struct dma_chan *jz4780_of_dma_xlate(struct of_phandle_args *dma_spec,
static int jz4780_dma_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
const struct jz4780_dma_soc_data *soc_data;
struct jz4780_dma_dev *jzdma;
struct jz4780_dma_chan *jzchan;
struct dma_device *dd;
struct resource *res;
int i, ret;
jzdma = devm_kzalloc(dev, sizeof(*jzdma), GFP_KERNEL);
if (!dev->of_node) {
dev_err(dev, "This driver must be probed from devicetree\n");
return -EINVAL;
}
soc_data = device_get_match_data(dev);
if (!soc_data)
return -EINVAL;
jzdma = devm_kzalloc(dev, sizeof(*jzdma)
+ sizeof(*jzdma->chan) * soc_data->nb_channels,
GFP_KERNEL);
if (!jzdma)
return -ENOMEM;
jzdma->soc_data = soc_data;
platform_set_drvdata(pdev, jzdma);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@ -773,9 +853,26 @@ static int jz4780_dma_probe(struct platform_device *pdev)
return -EINVAL;
}
jzdma->base = devm_ioremap_resource(dev, res);
if (IS_ERR(jzdma->base))
return PTR_ERR(jzdma->base);
jzdma->chn_base = devm_ioremap_resource(dev, res);
if (IS_ERR(jzdma->chn_base))
return PTR_ERR(jzdma->chn_base);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (res) {
jzdma->ctrl_base = devm_ioremap_resource(dev, res);
if (IS_ERR(jzdma->ctrl_base))
return PTR_ERR(jzdma->ctrl_base);
} else if (soc_data->flags & JZ_SOC_DATA_ALLOW_LEGACY_DT) {
/*
* On JZ4780, if the second memory resource was not supplied,
* assume we're using an old devicetree, and calculate the
* offset to the control registers.
*/
jzdma->ctrl_base = jzdma->chn_base + JZ4780_DMA_CTRL_OFFSET;
} else {
dev_err(dev, "failed to get I/O memory\n");
return -EINVAL;
}
ret = platform_get_irq(pdev, 0);
if (ret < 0) {
@ -833,13 +930,15 @@ static int jz4780_dma_probe(struct platform_device *pdev)
* Also set the FMSC bit - it increases MSC performance, so it makes
* little sense not to enable it.
*/
jz4780_dma_writel(jzdma, JZ_DMA_REG_DMAC,
JZ_DMA_DMAC_DMAE | JZ_DMA_DMAC_FMSC);
jz4780_dma_writel(jzdma, JZ_DMA_REG_DMACP, 0);
jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DMAC, JZ_DMA_DMAC_DMAE |
JZ_DMA_DMAC_FAIC | JZ_DMA_DMAC_FMSC);
if (soc_data->flags & JZ_SOC_DATA_PROGRAMMABLE_DMA)
jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DMACP, 0);
INIT_LIST_HEAD(&dd->channels);
for (i = 0; i < JZ_DMA_NR_CHANNELS; i++) {
for (i = 0; i < soc_data->nb_channels; i++) {
jzchan = &jzdma->chan[i];
jzchan->id = i;
@ -881,14 +980,40 @@ static int jz4780_dma_remove(struct platform_device *pdev)
free_irq(jzdma->irq, jzdma);
for (i = 0; i < JZ_DMA_NR_CHANNELS; i++)
for (i = 0; i < jzdma->soc_data->nb_channels; i++)
tasklet_kill(&jzdma->chan[i].vchan.task);
return 0;
}
static const struct jz4780_dma_soc_data jz4740_dma_soc_data = {
.nb_channels = 6,
.transfer_ord_max = 5,
};
static const struct jz4780_dma_soc_data jz4725b_dma_soc_data = {
.nb_channels = 6,
.transfer_ord_max = 5,
.flags = JZ_SOC_DATA_PER_CHAN_PM | JZ_SOC_DATA_NO_DCKES_DCKEC,
};
static const struct jz4780_dma_soc_data jz4770_dma_soc_data = {
.nb_channels = 6,
.transfer_ord_max = 6,
.flags = JZ_SOC_DATA_PER_CHAN_PM,
};
static const struct jz4780_dma_soc_data jz4780_dma_soc_data = {
.nb_channels = 32,
.transfer_ord_max = 7,
.flags = JZ_SOC_DATA_ALLOW_LEGACY_DT | JZ_SOC_DATA_PROGRAMMABLE_DMA,
};
static const struct of_device_id jz4780_dma_dt_match[] = {
{ .compatible = "ingenic,jz4780-dma", .data = NULL },
{ .compatible = "ingenic,jz4740-dma", .data = &jz4740_dma_soc_data },
{ .compatible = "ingenic,jz4725b-dma", .data = &jz4725b_dma_soc_data },
{ .compatible = "ingenic,jz4770-dma", .data = &jz4770_dma_soc_data },
{ .compatible = "ingenic,jz4780-dma", .data = &jz4780_dma_soc_data },
{},
};
MODULE_DEVICE_TABLE(of, jz4780_dma_dt_match);