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Diffstat (limited to 'arch/arm/plat-omap/dma.c')
-rw-r--r--arch/arm/plat-omap/dma.c180
1 files changed, 100 insertions, 80 deletions
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index c76ed8bff83..b5608b1f9fb 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -36,9 +36,7 @@
#include <linux/slab.h>
#include <linux/delay.h>
-#include <plat/cpu.h>
-#include <plat/dma.h>
-#include <plat/tc.h>
+#include <linux/omap-dma.h>
/*
* MAX_LOGICAL_DMA_CH_COUNT: the maximum number of logical DMA
@@ -72,6 +70,7 @@ static u32 errata;
static struct omap_dma_global_context_registers {
u32 dma_irqenable_l0;
+ u32 dma_irqenable_l1;
u32 dma_ocp_sysconfig;
u32 dma_gcr;
} omap_dma_global_context;
@@ -175,12 +174,13 @@ static inline void set_gdma_dev(int req, int dev)
#define omap_writel(val, reg) do {} while (0)
#endif
+#ifdef CONFIG_ARCH_OMAP1
void omap_set_dma_priority(int lch, int dst_port, int priority)
{
unsigned long reg;
u32 l;
- if (cpu_class_is_omap1()) {
+ if (dma_omap1()) {
switch (dst_port) {
case OMAP_DMA_PORT_OCP_T1: /* FFFECC00 */
reg = OMAP_TC_OCPT1_PRIOR;
@@ -203,18 +203,22 @@ void omap_set_dma_priority(int lch, int dst_port, int priority)
l |= (priority & 0xf) << 8;
omap_writel(l, reg);
}
+}
+#endif
- if (cpu_class_is_omap2()) {
- u32 ccr;
+#ifdef CONFIG_ARCH_OMAP2PLUS
+void omap_set_dma_priority(int lch, int dst_port, int priority)
+{
+ u32 ccr;
- ccr = p->dma_read(CCR, lch);
- if (priority)
- ccr |= (1 << 6);
- else
- ccr &= ~(1 << 6);
- p->dma_write(ccr, CCR, lch);
- }
+ ccr = p->dma_read(CCR, lch);
+ if (priority)
+ ccr |= (1 << 6);
+ else
+ ccr &= ~(1 << 6);
+ p->dma_write(ccr, CCR, lch);
}
+#endif
EXPORT_SYMBOL(omap_set_dma_priority);
void omap_set_dma_transfer_params(int lch, int data_type, int elem_count,
@@ -228,7 +232,7 @@ void omap_set_dma_transfer_params(int lch, int data_type, int elem_count,
l |= data_type;
p->dma_write(l, CSDP, lch);
- if (cpu_class_is_omap1()) {
+ if (dma_omap1()) {
u16 ccr;
ccr = p->dma_read(CCR, lch);
@@ -244,7 +248,7 @@ void omap_set_dma_transfer_params(int lch, int data_type, int elem_count,
p->dma_write(ccr, CCR2, lch);
}
- if (cpu_class_is_omap2() && dma_trigger) {
+ if (dma_omap2plus() && dma_trigger) {
u32 val;
val = p->dma_read(CCR, lch);
@@ -284,7 +288,7 @@ void omap_set_dma_color_mode(int lch, enum omap_dma_color_mode mode, u32 color)
{
BUG_ON(omap_dma_in_1510_mode());
- if (cpu_class_is_omap1()) {
+ if (dma_omap1()) {
u16 w;
w = p->dma_read(CCR2, lch);
@@ -314,7 +318,7 @@ void omap_set_dma_color_mode(int lch, enum omap_dma_color_mode mode, u32 color)
p->dma_write(w, LCH_CTRL, lch);
}
- if (cpu_class_is_omap2()) {
+ if (dma_omap2plus()) {
u32 val;
val = p->dma_read(CCR, lch);
@@ -342,7 +346,7 @@ EXPORT_SYMBOL(omap_set_dma_color_mode);
void omap_set_dma_write_mode(int lch, enum omap_dma_write_mode mode)
{
- if (cpu_class_is_omap2()) {
+ if (dma_omap2plus()) {
u32 csdp;
csdp = p->dma_read(CSDP, lch);
@@ -355,7 +359,7 @@ EXPORT_SYMBOL(omap_set_dma_write_mode);
void omap_set_dma_channel_mode(int lch, enum omap_dma_channel_mode mode)
{
- if (cpu_class_is_omap1() && !cpu_is_omap15xx()) {
+ if (dma_omap1() && !dma_omap15xx()) {
u32 l;
l = p->dma_read(LCH_CTRL, lch);
@@ -373,7 +377,7 @@ void omap_set_dma_src_params(int lch, int src_port, int src_amode,
{
u32 l;
- if (cpu_class_is_omap1()) {
+ if (dma_omap1()) {
u16 w;
w = p->dma_read(CSDP, lch);
@@ -415,7 +419,7 @@ EXPORT_SYMBOL(omap_set_dma_params);
void omap_set_dma_src_index(int lch, int eidx, int fidx)
{
- if (cpu_class_is_omap2())
+ if (dma_omap2plus())
return;
p->dma_write(eidx, CSEI, lch);
@@ -447,13 +451,13 @@ void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
case OMAP_DMA_DATA_BURST_DIS:
break;
case OMAP_DMA_DATA_BURST_4:
- if (cpu_class_is_omap2())
+ if (dma_omap2plus())
burst = 0x1;
else
burst = 0x2;
break;
case OMAP_DMA_DATA_BURST_8:
- if (cpu_class_is_omap2()) {
+ if (dma_omap2plus()) {
burst = 0x2;
break;
}
@@ -463,7 +467,7 @@ void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
* fall through
*/
case OMAP_DMA_DATA_BURST_16:
- if (cpu_class_is_omap2()) {
+ if (dma_omap2plus()) {
burst = 0x3;
break;
}
@@ -487,7 +491,7 @@ void omap_set_dma_dest_params(int lch, int dest_port, int dest_amode,
{
u32 l;
- if (cpu_class_is_omap1()) {
+ if (dma_omap1()) {
l = p->dma_read(CSDP, lch);
l &= ~(0x1f << 9);
l |= dest_port << 9;
@@ -508,7 +512,7 @@ EXPORT_SYMBOL(omap_set_dma_dest_params);
void omap_set_dma_dest_index(int lch, int eidx, int fidx)
{
- if (cpu_class_is_omap2())
+ if (dma_omap2plus())
return;
p->dma_write(eidx, CDEI, lch);
@@ -540,19 +544,19 @@ void omap_set_dma_dest_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
case OMAP_DMA_DATA_BURST_DIS:
break;
case OMAP_DMA_DATA_BURST_4:
- if (cpu_class_is_omap2())
+ if (dma_omap2plus())
burst = 0x1;
else
burst = 0x2;
break;
case OMAP_DMA_DATA_BURST_8:
- if (cpu_class_is_omap2())
+ if (dma_omap2plus())
burst = 0x2;
else
burst = 0x3;
break;
case OMAP_DMA_DATA_BURST_16:
- if (cpu_class_is_omap2()) {
+ if (dma_omap2plus()) {
burst = 0x3;
break;
}
@@ -573,7 +577,7 @@ EXPORT_SYMBOL(omap_set_dma_dest_burst_mode);
static inline void omap_enable_channel_irq(int lch)
{
/* Clear CSR */
- if (cpu_class_is_omap1())
+ if (dma_omap1())
p->dma_read(CSR, lch);
else
p->dma_write(OMAP2_DMA_CSR_CLEAR_MASK, CSR, lch);
@@ -587,7 +591,7 @@ static inline void omap_disable_channel_irq(int lch)
/* disable channel interrupts */
p->dma_write(0, CICR, lch);
/* Clear CSR */
- if (cpu_class_is_omap1())
+ if (dma_omap1())
p->dma_read(CSR, lch);
else
p->dma_write(OMAP2_DMA_CSR_CLEAR_MASK, CSR, lch);
@@ -611,7 +615,7 @@ static inline void enable_lnk(int lch)
l = p->dma_read(CLNK_CTRL, lch);
- if (cpu_class_is_omap1())
+ if (dma_omap1())
l &= ~(1 << 14);
/* Set the ENABLE_LNK bits */
@@ -619,7 +623,7 @@ static inline void enable_lnk(int lch)
l = dma_chan[lch].next_lch | (1 << 15);
#ifndef CONFIG_ARCH_OMAP1
- if (cpu_class_is_omap2())
+ if (dma_omap2plus())
if (dma_chan[lch].next_linked_ch != -1)
l = dma_chan[lch].next_linked_ch | (1 << 15);
#endif
@@ -636,12 +640,12 @@ static inline void disable_lnk(int lch)
/* Disable interrupts */
omap_disable_channel_irq(lch);
- if (cpu_class_is_omap1()) {
+ if (dma_omap1()) {
/* Set the STOP_LNK bit */
l |= 1 << 14;
}
- if (cpu_class_is_omap2()) {
+ if (dma_omap2plus()) {
/* Clear the ENABLE_LNK bit */
l &= ~(1 << 15);
}
@@ -655,7 +659,7 @@ static inline void omap2_enable_irq_lch(int lch)
u32 val;
unsigned long flags;
- if (!cpu_class_is_omap2())
+ if (dma_omap1())
return;
spin_lock_irqsave(&dma_chan_lock, flags);
@@ -673,7 +677,7 @@ static inline void omap2_disable_irq_lch(int lch)
u32 val;
unsigned long flags;
- if (!cpu_class_is_omap2())
+ if (dma_omap1())
return;
spin_lock_irqsave(&dma_chan_lock, flags);
@@ -698,8 +702,8 @@ int omap_request_dma(int dev_id, const char *dev_name,
for (ch = 0; ch < dma_chan_count; ch++) {
if (free_ch == -1 && dma_chan[ch].dev_id == -1) {
free_ch = ch;
- if (dev_id == 0)
- break;
+ /* Exit after first free channel found */
+ break;
}
}
if (free_ch == -1) {
@@ -712,7 +716,7 @@ int omap_request_dma(int dev_id, const char *dev_name,
if (p->clear_lch_regs)
p->clear_lch_regs(free_ch);
- if (cpu_class_is_omap2())
+ if (dma_omap2plus())
omap_clear_dma(free_ch);
spin_unlock_irqrestore(&dma_chan_lock, flags);
@@ -723,7 +727,7 @@ int omap_request_dma(int dev_id, const char *dev_name,
chan->flags = 0;
#ifndef CONFIG_ARCH_OMAP1
- if (cpu_class_is_omap2()) {
+ if (dma_omap2plus()) {
chan->chain_id = -1;
chan->next_linked_ch = -1;
}
@@ -731,13 +735,13 @@ int omap_request_dma(int dev_id, const char *dev_name,
chan->enabled_irqs = OMAP_DMA_DROP_IRQ | OMAP_DMA_BLOCK_IRQ;
- if (cpu_class_is_omap1())
+ if (dma_omap1())
chan->enabled_irqs |= OMAP1_DMA_TOUT_IRQ;
- else if (cpu_class_is_omap2())
+ else if (dma_omap2plus())
chan->enabled_irqs |= OMAP2_DMA_MISALIGNED_ERR_IRQ |
OMAP2_DMA_TRANS_ERR_IRQ;
- if (cpu_is_omap16xx()) {
+ if (dma_omap16xx()) {
/* If the sync device is set, configure it dynamically. */
if (dev_id != 0) {
set_gdma_dev(free_ch + 1, dev_id);
@@ -748,11 +752,11 @@ int omap_request_dma(int dev_id, const char *dev_name,
* id.
*/
p->dma_write(dev_id | (1 << 10), CCR, free_ch);
- } else if (cpu_is_omap7xx() || cpu_is_omap15xx()) {
+ } else if (dma_omap1()) {
p->dma_write(dev_id, CCR, free_ch);
}
- if (cpu_class_is_omap2()) {
+ if (dma_omap2plus()) {
omap_enable_channel_irq(free_ch);
omap2_enable_irq_lch(free_ch);
}
@@ -774,7 +778,7 @@ void omap_free_dma(int lch)
}
/* Disable interrupt for logical channel */
- if (cpu_class_is_omap2())
+ if (dma_omap2plus())
omap2_disable_irq_lch(lch);
/* Disable all DMA interrupts for the channel. */
@@ -784,7 +788,7 @@ void omap_free_dma(int lch)
p->dma_write(0, CCR, lch);
/* Clear registers */
- if (cpu_class_is_omap2())
+ if (dma_omap2plus())
omap_clear_dma(lch);
spin_lock_irqsave(&dma_chan_lock, flags);
@@ -810,7 +814,7 @@ omap_dma_set_global_params(int arb_rate, int max_fifo_depth, int tparams)
{
u32 reg;
- if (!cpu_class_is_omap2()) {
+ if (dma_omap1()) {
printk(KERN_ERR "FIXME: no %s on 15xx/16xx\n", __func__);
return;
}
@@ -849,7 +853,7 @@ omap_dma_set_prio_lch(int lch, unsigned char read_prio,
}
l = p->dma_read(CCR, lch);
l &= ~((1 << 6) | (1 << 26));
- if (cpu_class_is_omap2() && !cpu_is_omap242x())
+ if (d->dev_caps & IS_RW_PRIORITY)
l |= ((read_prio & 0x1) << 6) | ((write_prio & 0x1) << 26);
else
l |= ((read_prio & 0x1) << 6);
@@ -882,7 +886,7 @@ void omap_start_dma(int lch)
* The CPC/CDAC register needs to be initialized to zero
* before starting dma transfer.
*/
- if (cpu_is_omap15xx())
+ if (dma_omap15xx())
p->dma_write(0, CPC, lch);
else
p->dma_write(0, CDAC, lch);
@@ -891,11 +895,12 @@ void omap_start_dma(int lch)
int next_lch, cur_lch;
char dma_chan_link_map[MAX_LOGICAL_DMA_CH_COUNT];
- dma_chan_link_map[lch] = 1;
/* Set the link register of the first channel */
enable_lnk(lch);
memset(dma_chan_link_map, 0, sizeof(dma_chan_link_map));
+ dma_chan_link_map[lch] = 1;
+
cur_lch = dma_chan[lch].next_lch;
do {
next_lch = dma_chan[cur_lch].next_lch;
@@ -1045,7 +1050,7 @@ dma_addr_t omap_get_dma_src_pos(int lch)
{
dma_addr_t offset = 0;
- if (cpu_is_omap15xx())
+ if (dma_omap15xx())
offset = p->dma_read(CPC, lch);
else
offset = p->dma_read(CSAC, lch);
@@ -1053,7 +1058,7 @@ dma_addr_t omap_get_dma_src_pos(int lch)
if (IS_DMA_ERRATA(DMA_ERRATA_3_3) && offset == 0)
offset = p->dma_read(CSAC, lch);
- if (!cpu_is_omap15xx()) {
+ if (!dma_omap15xx()) {
/*
* CDAC == 0 indicates that the DMA transfer on the channel has
* not been started (no data has been transferred so far).
@@ -1065,7 +1070,7 @@ dma_addr_t omap_get_dma_src_pos(int lch)
offset = p->dma_read(CSSA, lch);
}
- if (cpu_class_is_omap1())
+ if (dma_omap1())
offset |= (p->dma_read(CSSA, lch) & 0xFFFF0000);
return offset;
@@ -1084,7 +1089,7 @@ dma_addr_t omap_get_dma_dst_pos(int lch)
{
dma_addr_t offset = 0;
- if (cpu_is_omap15xx())
+ if (dma_omap15xx())
offset = p->dma_read(CPC, lch);
else
offset = p->dma_read(CDAC, lch);
@@ -1093,7 +1098,7 @@ dma_addr_t omap_get_dma_dst_pos(int lch)
* omap 3.2/3.3 erratum: sometimes 0 is returned if CSAC/CDAC is
* read before the DMA controller finished disabling the channel.
*/
- if (!cpu_is_omap15xx() && offset == 0) {
+ if (!dma_omap15xx() && offset == 0) {
offset = p->dma_read(CDAC, lch);
/*
* CDAC == 0 indicates that the DMA transfer on the channel has
@@ -1104,7 +1109,7 @@ dma_addr_t omap_get_dma_dst_pos(int lch)
offset = p->dma_read(CDSA, lch);
}
- if (cpu_class_is_omap1())
+ if (dma_omap1())
offset |= (p->dma_read(CDSA, lch) & 0xFFFF0000);
return offset;
@@ -1121,7 +1126,7 @@ int omap_dma_running(void)
{
int lch;
- if (cpu_class_is_omap1())
+ if (dma_omap1())
if (omap_lcd_dma_running())
return 1;
@@ -1961,7 +1966,6 @@ static irqreturn_t omap2_dma_irq_handler(int irq, void *dev_id)
static struct irqaction omap24xx_dma_irq = {
.name = "DMA",
.handler = omap2_dma_irq_handler,
- .flags = IRQF_DISABLED
};
#else
@@ -1970,10 +1974,17 @@ static struct irqaction omap24xx_dma_irq;
/*----------------------------------------------------------------------------*/
+/*
+ * Note that we are currently using only IRQENABLE_L0 and L1.
+ * As the DSP may be using IRQENABLE_L2 and L3, let's not
+ * touch those for now.
+ */
void omap_dma_global_context_save(void)
{
omap_dma_global_context.dma_irqenable_l0 =
p->dma_read(IRQENABLE_L0, 0);
+ omap_dma_global_context.dma_irqenable_l1 =
+ p->dma_read(IRQENABLE_L1, 0);
omap_dma_global_context.dma_ocp_sysconfig =
p->dma_read(OCP_SYSCONFIG, 0);
omap_dma_global_context.dma_gcr = p->dma_read(GCR, 0);
@@ -1988,6 +1999,8 @@ void omap_dma_global_context_restore(void)
OCP_SYSCONFIG, 0);
p->dma_write(omap_dma_global_context.dma_irqenable_l0,
IRQENABLE_L0, 0);
+ p->dma_write(omap_dma_global_context.dma_irqenable_l1,
+ IRQENABLE_L1, 0);
if (IS_DMA_ERRATA(DMA_ROMCODE_BUG))
p->dma_write(0x3 , IRQSTATUS_L0, 0);
@@ -1997,7 +2010,13 @@ void omap_dma_global_context_restore(void)
omap_clear_dma(ch);
}
-static int __devinit omap_system_dma_probe(struct platform_device *pdev)
+struct omap_system_dma_plat_info *omap_get_plat_info(void)
+{
+ return p;
+}
+EXPORT_SYMBOL_GPL(omap_get_plat_info);
+
+static int omap_system_dma_probe(struct platform_device *pdev)
{
int ch, ret = 0;
int dma_irq;
@@ -2016,15 +2035,22 @@ static int __devinit omap_system_dma_probe(struct platform_device *pdev)
errata = p->errata;
if ((d->dev_caps & RESERVE_CHANNEL) && omap_dma_reserve_channels
- && (omap_dma_reserve_channels <= dma_lch_count))
+ && (omap_dma_reserve_channels < d->lch_count))
d->lch_count = omap_dma_reserve_channels;
dma_lch_count = d->lch_count;
dma_chan_count = dma_lch_count;
- dma_chan = d->chan;
enable_1510_mode = d->dev_caps & ENABLE_1510_MODE;
- if (cpu_class_is_omap2()) {
+ dma_chan = devm_kcalloc(&pdev->dev, dma_lch_count,
+ sizeof(struct omap_dma_lch), GFP_KERNEL);
+ if (!dma_chan) {
+ dev_err(&pdev->dev, "%s: kzalloc fail\n", __func__);
+ return -ENOMEM;
+ }
+
+
+ if (dma_omap2plus()) {
dma_linked_lch = kzalloc(sizeof(struct dma_link_info) *
dma_lch_count, GFP_KERNEL);
if (!dma_linked_lch) {
@@ -2036,7 +2062,7 @@ static int __devinit omap_system_dma_probe(struct platform_device *pdev)
spin_lock_init(&dma_chan_lock);
for (ch = 0; ch < dma_chan_count; ch++) {
omap_clear_dma(ch);
- if (cpu_class_is_omap2())
+ if (dma_omap2plus())
omap2_disable_irq_lch(ch);
dma_chan[ch].dev_id = -1;
@@ -2045,7 +2071,7 @@ static int __devinit omap_system_dma_probe(struct platform_device *pdev)
if (ch >= 6 && enable_1510_mode)
continue;
- if (cpu_class_is_omap1()) {
+ if (dma_omap1()) {
/*
* request_irq() doesn't like dev_id (ie. ch) being
* zero, so we have to kludge around this.
@@ -2070,15 +2096,16 @@ static int __devinit omap_system_dma_probe(struct platform_device *pdev)
}
}
- if (cpu_class_is_omap2() && !cpu_is_omap242x())
+ if (d->dev_caps & IS_RW_PRIORITY)
omap_dma_set_global_params(DMA_DEFAULT_ARB_RATE,
DMA_DEFAULT_FIFO_DEPTH, 0);
- if (cpu_class_is_omap2()) {
+ if (dma_omap2plus()) {
strcpy(irq_name, "0");
dma_irq = platform_get_irq_byname(pdev, irq_name);
if (dma_irq < 0) {
dev_err(&pdev->dev, "failed: request IRQ %d", dma_irq);
+ ret = dma_irq;
goto exit_dma_lch_fail;
}
ret = setup_irq(dma_irq, &omap24xx_dma_irq);
@@ -2089,9 +2116,8 @@ static int __devinit omap_system_dma_probe(struct platform_device *pdev)
}
}
- /* reserve dma channels 0 and 1 in high security devices */
- if (cpu_is_omap34xx() &&
- (omap_type() != OMAP2_DEVICE_TYPE_GP)) {
+ /* reserve dma channels 0 and 1 in high security devices on 34xx */
+ if (d->dev_caps & HS_CHANNELS_RESERVED) {
pr_info("Reserving DMA channels 0 and 1 for HS ROM code\n");
dma_chan[0].dev_id = 0;
dma_chan[1].dev_id = 1;
@@ -2108,17 +2134,14 @@ exit_dma_irq_fail:
}
exit_dma_lch_fail:
- kfree(p);
- kfree(d);
- kfree(dma_chan);
return ret;
}
-static int __devexit omap_system_dma_remove(struct platform_device *pdev)
+static int omap_system_dma_remove(struct platform_device *pdev)
{
int dma_irq;
- if (cpu_class_is_omap2()) {
+ if (dma_omap2plus()) {
char irq_name[4];
strcpy(irq_name, "0");
dma_irq = platform_get_irq_byname(pdev, irq_name);
@@ -2130,15 +2153,12 @@ static int __devexit omap_system_dma_remove(struct platform_device *pdev)
free_irq(dma_irq, (void *)(irq_rel + 1));
}
}
- kfree(p);
- kfree(d);
- kfree(dma_chan);
return 0;
}
static struct platform_driver omap_system_dma_driver = {
.probe = omap_system_dma_probe,
- .remove = __devexit_p(omap_system_dma_remove),
+ .remove = omap_system_dma_remove,
.driver = {
.name = "omap_dma_system"
},
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 05:12:00 +0000