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dmaengine: PL08x: Add support for different offset of CONFIG register

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Some variants of PL08x (namely PL080S, found in Samsung S3C64xx SoCs)
have CONFIG register at different offset. This patch makes the driver
use offset from vendor data struct.

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Tomasz Figa 2013-08-11 19:59:14 +02:00 committed by Vinod Koul
parent 68a7faa200
commit d86ccea794
1 changed files with 18 additions and 12 deletions
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30
drivers/dma/amba-pl08x.c
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@ -102,6 +102,7 @@ struct pl08x_driver_data;
* missing
*/
struct vendor_data {
u8 config_offset;
u8 channels;
bool dualmaster;
bool nomadik;
@ -145,6 +146,7 @@ struct pl08x_bus_data {
struct pl08x_phy_chan {
unsigned int id;
void __iomem *base;
void __iomem *reg_config;
spinlock_t lock;
struct pl08x_dma_chan *serving;
bool locked;
@ -334,7 +336,7 @@ static int pl08x_phy_channel_busy(struct pl08x_phy_chan *ch)
{
unsigned int val;
val = readl(ch->base + PL080_CH_CONFIG);
val = readl(ch->reg_config);
return val & PL080_CONFIG_ACTIVE;
}
@ -373,7 +375,7 @@ static void pl08x_start_next_txd(struct pl08x_dma_chan *plchan)
writel(lli->dst, phychan->base + PL080_CH_DST_ADDR);
writel(lli->lli, phychan->base + PL080_CH_LLI);
writel(lli->cctl, phychan->base + PL080_CH_CONTROL);
writel(txd->ccfg, phychan->base + PL080_CH_CONFIG);
writel(txd->ccfg, phychan->reg_config);
/* Enable the DMA channel */
/* Do not access config register until channel shows as disabled */
@ -381,11 +383,11 @@ static void pl08x_start_next_txd(struct pl08x_dma_chan *plchan)
cpu_relax();
/* Do not access config register until channel shows as inactive */
val = readl(phychan->base + PL080_CH_CONFIG);
val = readl(phychan->reg_config);
while ((val & PL080_CONFIG_ACTIVE) || (val & PL080_CONFIG_ENABLE))
val = readl(phychan->base + PL080_CH_CONFIG);
val = readl(phychan->reg_config);
writel(val | PL080_CONFIG_ENABLE, phychan->base + PL080_CH_CONFIG);
writel(val | PL080_CONFIG_ENABLE, phychan->reg_config);
}
/*
@ -404,9 +406,9 @@ static void pl08x_pause_phy_chan(struct pl08x_phy_chan *ch)
int timeout;
/* Set the HALT bit and wait for the FIFO to drain */
val = readl(ch->base + PL080_CH_CONFIG);
val = readl(ch->reg_config);
val |= PL080_CONFIG_HALT;
writel(val, ch->base + PL080_CH_CONFIG);
writel(val, ch->reg_config);
/* Wait for channel inactive */
for (timeout = 1000; timeout; timeout--) {
@ -423,9 +425,9 @@ static void pl08x_resume_phy_chan(struct pl08x_phy_chan *ch)
u32 val;
/* Clear the HALT bit */
val = readl(ch->base + PL080_CH_CONFIG);
val = readl(ch->reg_config);
val &= ~PL080_CONFIG_HALT;
writel(val, ch->base + PL080_CH_CONFIG);
writel(val, ch->reg_config);
}
/*
@ -437,12 +439,12 @@ static void pl08x_resume_phy_chan(struct pl08x_phy_chan *ch)
static void pl08x_terminate_phy_chan(struct pl08x_driver_data *pl08x,
struct pl08x_phy_chan *ch)
{
u32 val = readl(ch->base + PL080_CH_CONFIG);
u32 val = readl(ch->reg_config);
val &= ~(PL080_CONFIG_ENABLE | PL080_CONFIG_ERR_IRQ_MASK |
PL080_CONFIG_TC_IRQ_MASK);
writel(val, ch->base + PL080_CH_CONFIG);
writel(val, ch->reg_config);
writel(1 << ch->id, pl08x->base + PL080_ERR_CLEAR);
writel(1 << ch->id, pl08x->base + PL080_TC_CLEAR);
@ -1952,6 +1954,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
ch->id = i;
ch->base = pl08x->base + PL080_Cx_BASE(i);
ch->reg_config = ch->base + vd->config_offset;
spin_lock_init(&ch->lock);
/*
@ -1962,7 +1965,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
if (vd->nomadik) {
u32 val;
val = readl(ch->base + PL080_CH_CONFIG);
val = readl(ch->reg_config);
if (val & (PL080N_CONFIG_ITPROT | PL080N_CONFIG_SECPROT)) {
dev_info(&adev->dev, "physical channel %d reserved for secure access only\n", i);
ch->locked = true;
@ -2043,17 +2046,20 @@ out_no_pl08x:
/* PL080 has 8 channels and the PL080 have just 2 */
static struct vendor_data vendor_pl080 = {
.config_offset = PL080_CH_CONFIG,
.channels = 8,
.dualmaster = true,
};
static struct vendor_data vendor_nomadik = {
.config_offset = PL080_CH_CONFIG,
.channels = 8,
.dualmaster = true,
.nomadik = true,
};
static struct vendor_data vendor_pl081 = {
.config_offset = PL080_CH_CONFIG,
.channels = 2,
.dualmaster = false,
};