* DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz@nokia.com>
* Graphics DMA and LCD DMA graphics tranformations
* by Imre Deak <imre.deak@nokia.com>
+ * OMAP2 support Copyright (C) 2004-2005 Texas Instruments, Inc.
+ * Merged to support both OMAP1 and OMAP2 by Tony Lindgren <tony@atomide.com>
* Some functions based on earlier dma-omap.c Copyright (C) 2001 RidgeRun, Inc.
*
* Support functions for the OMAP internal DMA channels.
#include <asm/arch/tc.h>
-#define OMAP_DMA_ACTIVE 0x01
+#define DEBUG_PRINTS
+#undef DEBUG_PRINTS
+#ifdef DEBUG_PRINTS
+#define debug_printk(x) printk x
+#else
+#define debug_printk(x)
+#endif
+#define OMAP_DMA_ACTIVE 0x01
#define OMAP_DMA_CCR_EN (1 << 7)
#define OMAP_FUNC_MUX_ARM_BASE (0xfffe1000 + 0xec)
static spinlock_t dma_chan_lock;
static struct omap_dma_lch dma_chan[OMAP_LOGICAL_DMA_CH_COUNT];
-const static u8 dma_irq[OMAP_LOGICAL_DMA_CH_COUNT] = {
+static const u8 omap1_dma_irq[OMAP_LOGICAL_DMA_CH_COUNT] = {
INT_DMA_CH0_6, INT_DMA_CH1_7, INT_DMA_CH2_8, INT_DMA_CH3,
INT_DMA_CH4, INT_DMA_CH5, INT_1610_DMA_CH6, INT_1610_DMA_CH7,
INT_1610_DMA_CH8, INT_1610_DMA_CH9, INT_1610_DMA_CH10,
INT_1610_DMA_CH14, INT_1610_DMA_CH15, INT_DMA_LCD
};
+#define REVISIT_24XX() printk(KERN_ERR "FIXME: no %s on 24xx\n", \
+ __FUNCTION__);
+
+#ifdef CONFIG_ARCH_OMAP15XX
+/* Returns 1 if the DMA module is in OMAP1510-compatible mode, 0 otherwise */
+int omap_dma_in_1510_mode(void)
+{
+ return enable_1510_mode;
+}
+#else
+#define omap_dma_in_1510_mode() 0
+#endif
+
+#ifdef CONFIG_ARCH_OMAP1
static inline int get_gdma_dev(int req)
{
u32 reg = OMAP_FUNC_MUX_ARM_BASE + ((req - 1) / 5) * 4;
l |= (dev - 1) << shift;
omap_writel(l, reg);
}
+#else
+#define set_gdma_dev(req, dev) do {} while (0)
+#endif
static void clear_lch_regs(int lch)
{
}
void omap_set_dma_transfer_params(int lch, int data_type, int elem_count,
- int frame_count, int sync_mode)
+ int frame_count, int sync_mode,
+ int dma_trigger, int src_or_dst_synch)
{
- u16 w;
+ OMAP_DMA_CSDP_REG(lch) &= ~0x03;
+ OMAP_DMA_CSDP_REG(lch) |= data_type;
- w = omap_readw(OMAP_DMA_CSDP(lch));
- w &= ~0x03;
- w |= data_type;
- omap_writew(w, OMAP_DMA_CSDP(lch));
+ if (cpu_class_is_omap1()) {
+ OMAP_DMA_CCR_REG(lch) &= ~(1 << 5);
+ if (sync_mode == OMAP_DMA_SYNC_FRAME)
+ OMAP_DMA_CCR_REG(lch) |= 1 << 5;
+
+ OMAP1_DMA_CCR2_REG(lch) &= ~(1 << 2);
+ if (sync_mode == OMAP_DMA_SYNC_BLOCK)
+ OMAP1_DMA_CCR2_REG(lch) |= 1 << 2;
+ }
+
+ if (cpu_is_omap24xx() && dma_trigger) {
+ u32 val = OMAP_DMA_CCR_REG(lch);
+
+ if (dma_trigger > 63)
+ val |= 1 << 20;
+ if (dma_trigger > 31)
+ val |= 1 << 19;
- w = omap_readw(OMAP_DMA_CCR(lch));
- w &= ~(1 << 5);
- if (sync_mode == OMAP_DMA_SYNC_FRAME)
- w |= 1 << 5;
- omap_writew(w, OMAP_DMA_CCR(lch));
+ val |= (dma_trigger & 0x1f);
- w = omap_readw(OMAP_DMA_CCR2(lch));
- w &= ~(1 << 2);
- if (sync_mode == OMAP_DMA_SYNC_BLOCK)
- w |= 1 << 2;
- omap_writew(w, OMAP_DMA_CCR2(lch));
+ if (sync_mode & OMAP_DMA_SYNC_FRAME)
+ val |= 1 << 5;
- omap_writew(elem_count, OMAP_DMA_CEN(lch));
- omap_writew(frame_count, OMAP_DMA_CFN(lch));
+ if (sync_mode & OMAP_DMA_SYNC_BLOCK)
+ val |= 1 << 18;
+ if (src_or_dst_synch)
+ val |= 1 << 24; /* source synch */
+ else
+ val &= ~(1 << 24); /* dest synch */
+
+ OMAP_DMA_CCR_REG(lch) = val;
+ }
+
+ OMAP_DMA_CEN_REG(lch) = elem_count;
+ OMAP_DMA_CFN_REG(lch) = frame_count;
}
+
void omap_set_dma_color_mode(int lch, enum omap_dma_color_mode mode, u32 color)
{
u16 w;
BUG_ON(omap_dma_in_1510_mode());
- w = omap_readw(OMAP_DMA_CCR2(lch)) & ~0x03;
+ if (cpu_is_omap24xx()) {
+ REVISIT_24XX();
+ return;
+ }
+
+ w = OMAP1_DMA_CCR2_REG(lch) & ~0x03;
switch (mode) {
case OMAP_DMA_CONSTANT_FILL:
w |= 0x01;
default:
BUG();
}
- omap_writew(w, OMAP_DMA_CCR2(lch));
+ OMAP1_DMA_CCR2_REG(lch) = w;
- w = omap_readw(OMAP_DMA_LCH_CTRL(lch)) & ~0x0f;
+ w = OMAP1_DMA_LCH_CTRL_REG(lch) & ~0x0f;
/* Default is channel type 2D */
if (mode) {
- omap_writew((u16)color, OMAP_DMA_COLOR_L(lch));
- omap_writew((u16)(color >> 16), OMAP_DMA_COLOR_U(lch));
+ OMAP1_DMA_COLOR_L_REG(lch) = (u16)color;
+ OMAP1_DMA_COLOR_U_REG(lch) = (u16)(color >> 16);
w |= 1; /* Channel type G */
}
- omap_writew(w, OMAP_DMA_LCH_CTRL(lch));
+ OMAP1_DMA_LCH_CTRL_REG(lch) = w;
}
-
+/* Note that src_port is only for omap1 */
void omap_set_dma_src_params(int lch, int src_port, int src_amode,
- unsigned long src_start)
+ unsigned long src_start,
+ int src_ei, int src_fi)
{
- u16 w;
+ if (cpu_class_is_omap1()) {
+ OMAP_DMA_CSDP_REG(lch) &= ~(0x1f << 2);
+ OMAP_DMA_CSDP_REG(lch) |= src_port << 2;
+ }
+
+ OMAP_DMA_CCR_REG(lch) &= ~(0x03 << 12);
+ OMAP_DMA_CCR_REG(lch) |= src_amode << 12;
+
+ if (cpu_class_is_omap1()) {
+ OMAP1_DMA_CSSA_U_REG(lch) = src_start >> 16;
+ OMAP1_DMA_CSSA_L_REG(lch) = src_start;
+ }
- w = omap_readw(OMAP_DMA_CSDP(lch));
- w &= ~(0x1f << 2);
- w |= src_port << 2;
- omap_writew(w, OMAP_DMA_CSDP(lch));
+ if (cpu_is_omap24xx())
+ OMAP2_DMA_CSSA_REG(lch) = src_start;
- w = omap_readw(OMAP_DMA_CCR(lch));
- w &= ~(0x03 << 12);
- w |= src_amode << 12;
- omap_writew(w, OMAP_DMA_CCR(lch));
+ OMAP_DMA_CSEI_REG(lch) = src_ei;
+ OMAP_DMA_CSFI_REG(lch) = src_fi;
+}
- omap_writew(src_start >> 16, OMAP_DMA_CSSA_U(lch));
- omap_writew(src_start, OMAP_DMA_CSSA_L(lch));
+void omap_set_dma_params(int lch, struct omap_dma_channel_params * params)
+{
+ omap_set_dma_transfer_params(lch, params->data_type,
+ params->elem_count, params->frame_count,
+ params->sync_mode, params->trigger,
+ params->src_or_dst_synch);
+ omap_set_dma_src_params(lch, params->src_port,
+ params->src_amode, params->src_start,
+ params->src_ei, params->src_fi);
+
+ omap_set_dma_dest_params(lch, params->dst_port,
+ params->dst_amode, params->dst_start,
+ params->dst_ei, params->dst_fi);
}
void omap_set_dma_src_index(int lch, int eidx, int fidx)
{
- omap_writew(eidx, OMAP_DMA_CSEI(lch));
- omap_writew(fidx, OMAP_DMA_CSFI(lch));
+ if (cpu_is_omap24xx()) {
+ REVISIT_24XX();
+ return;
+ }
+ OMAP_DMA_CSEI_REG(lch) = eidx;
+ OMAP_DMA_CSFI_REG(lch) = fidx;
}
void omap_set_dma_src_data_pack(int lch, int enable)
{
- u16 w;
-
- w = omap_readw(OMAP_DMA_CSDP(lch)) & ~(1 << 6);
- w |= enable ? (1 << 6) : 0;
- omap_writew(w, OMAP_DMA_CSDP(lch));
+ OMAP_DMA_CSDP_REG(lch) &= ~(1 << 6);
+ if (enable)
+ OMAP_DMA_CSDP_REG(lch) |= (1 << 6);
}
void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
{
- u16 w;
+ OMAP_DMA_CSDP_REG(lch) &= ~(0x03 << 7);
- w = omap_readw(OMAP_DMA_CSDP(lch)) & ~(0x03 << 7);
switch (burst_mode) {
case OMAP_DMA_DATA_BURST_DIS:
break;
case OMAP_DMA_DATA_BURST_4:
- w |= (0x01 << 7);
+ OMAP_DMA_CSDP_REG(lch) |= (0x02 << 7);
break;
case OMAP_DMA_DATA_BURST_8:
/* not supported by current hardware
default:
BUG();
}
- omap_writew(w, OMAP_DMA_CSDP(lch));
}
+/* Note that dest_port is only for OMAP1 */
void omap_set_dma_dest_params(int lch, int dest_port, int dest_amode,
- unsigned long dest_start)
+ unsigned long dest_start,
+ int dst_ei, int dst_fi)
{
- u16 w;
+ if (cpu_class_is_omap1()) {
+ OMAP_DMA_CSDP_REG(lch) &= ~(0x1f << 9);
+ OMAP_DMA_CSDP_REG(lch) |= dest_port << 9;
+ }
- w = omap_readw(OMAP_DMA_CSDP(lch));
- w &= ~(0x1f << 9);
- w |= dest_port << 9;
- omap_writew(w, OMAP_DMA_CSDP(lch));
+ OMAP_DMA_CCR_REG(lch) &= ~(0x03 << 14);
+ OMAP_DMA_CCR_REG(lch) |= dest_amode << 14;
+
+ if (cpu_class_is_omap1()) {
+ OMAP1_DMA_CDSA_U_REG(lch) = dest_start >> 16;
+ OMAP1_DMA_CDSA_L_REG(lch) = dest_start;
+ }
- w = omap_readw(OMAP_DMA_CCR(lch));
- w &= ~(0x03 << 14);
- w |= dest_amode << 14;
- omap_writew(w, OMAP_DMA_CCR(lch));
+ if (cpu_is_omap24xx())
+ OMAP2_DMA_CDSA_REG(lch) = dest_start;
- omap_writew(dest_start >> 16, OMAP_DMA_CDSA_U(lch));
- omap_writew(dest_start, OMAP_DMA_CDSA_L(lch));
+ OMAP_DMA_CDEI_REG(lch) = dst_ei;
+ OMAP_DMA_CDFI_REG(lch) = dst_fi;
}
void omap_set_dma_dest_index(int lch, int eidx, int fidx)
{
- omap_writew(eidx, OMAP_DMA_CDEI(lch));
- omap_writew(fidx, OMAP_DMA_CDFI(lch));
+ if (cpu_is_omap24xx()) {
+ REVISIT_24XX();
+ return;
+ }
+ OMAP_DMA_CDEI_REG(lch) = eidx;
+ OMAP_DMA_CDFI_REG(lch) = fidx;
}
void omap_set_dma_dest_data_pack(int lch, int enable)
{
- u16 w;
-
- w = omap_readw(OMAP_DMA_CSDP(lch)) & ~(1 << 13);
- w |= enable ? (1 << 13) : 0;
- omap_writew(w, OMAP_DMA_CSDP(lch));
+ OMAP_DMA_CSDP_REG(lch) &= ~(1 << 13);
+ if (enable)
+ OMAP_DMA_CSDP_REG(lch) |= 1 << 13;
}
void omap_set_dma_dest_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
{
- u16 w;
+ OMAP_DMA_CSDP_REG(lch) &= ~(0x03 << 14);
- w = omap_readw(OMAP_DMA_CSDP(lch)) & ~(0x03 << 14);
switch (burst_mode) {
case OMAP_DMA_DATA_BURST_DIS:
break;
case OMAP_DMA_DATA_BURST_4:
- w |= (0x01 << 14);
+ OMAP_DMA_CSDP_REG(lch) |= (0x02 << 14);
break;
case OMAP_DMA_DATA_BURST_8:
- w |= (0x03 << 14);
+ OMAP_DMA_CSDP_REG(lch) |= (0x03 << 14);
break;
default:
printk(KERN_ERR "Invalid DMA burst mode\n");
BUG();
return;
}
- omap_writew(w, OMAP_DMA_CSDP(lch));
}
-static inline void init_intr(int lch)
+static inline void omap_enable_channel_irq(int lch)
{
- u16 w;
+ u32 status;
/* Read CSR to make sure it's cleared. */
- w = omap_readw(OMAP_DMA_CSR(lch));
+ status = OMAP_DMA_CSR_REG(lch);
+
/* Enable some nice interrupts. */
- omap_writew(dma_chan[lch].enabled_irqs, OMAP_DMA_CICR(lch));
+ OMAP_DMA_CICR_REG(lch) = dma_chan[lch].enabled_irqs;
+
dma_chan[lch].flags |= OMAP_DMA_ACTIVE;
}
-static inline void enable_lnk(int lch)
+static void omap_disable_channel_irq(int lch)
{
- u16 w;
+ if (cpu_is_omap24xx())
+ OMAP_DMA_CICR_REG(lch) = 0;
+}
- /* Clear the STOP_LNK bits */
- w = omap_readw(OMAP_DMA_CLNK_CTRL(lch));
- w &= ~(1 << 14);
- omap_writew(w, OMAP_DMA_CLNK_CTRL(lch));
+void omap_enable_dma_irq(int lch, u16 bits)
+{
+ dma_chan[lch].enabled_irqs |= bits;
+}
- /* And set the ENABLE_LNK bits */
+void omap_disable_dma_irq(int lch, u16 bits)
+{
+ dma_chan[lch].enabled_irqs &= ~bits;
+}
+
+static inline void enable_lnk(int lch)
+{
+ if (cpu_class_is_omap1())
+ OMAP_DMA_CLNK_CTRL_REG(lch) &= ~(1 << 14);
+
+ /* Set the ENABLE_LNK bits */
if (dma_chan[lch].next_lch != -1)
- omap_writew(dma_chan[lch].next_lch | (1 << 15),
- OMAP_DMA_CLNK_CTRL(lch));
+ OMAP_DMA_CLNK_CTRL_REG(lch) =
+ dma_chan[lch].next_lch | (1 << 15);
}
static inline void disable_lnk(int lch)
{
- u16 w;
-
/* Disable interrupts */
- omap_writew(0, OMAP_DMA_CICR(lch));
+ if (cpu_class_is_omap1()) {
+ OMAP_DMA_CICR_REG(lch) = 0;
+ /* Set the STOP_LNK bit */
+ OMAP_DMA_CLNK_CTRL_REG(lch) |= 1 << 14;
+ }
- /* Set the STOP_LNK bit */
- w = omap_readw(OMAP_DMA_CLNK_CTRL(lch));
- w |= (1 << 14);
- w = omap_writew(w, OMAP_DMA_CLNK_CTRL(lch));
+ if (cpu_is_omap24xx()) {
+ omap_disable_channel_irq(lch);
+ /* Clear the ENABLE_LNK bit */
+ OMAP_DMA_CLNK_CTRL_REG(lch) &= ~(1 << 15);
+ }
dma_chan[lch].flags &= ~OMAP_DMA_ACTIVE;
}
-void omap_start_dma(int lch)
+static inline void omap2_enable_irq_lch(int lch)
{
- u16 w;
+ u32 val;
+ if (!cpu_is_omap24xx())
+ return;
+
+ val = omap_readl(OMAP_DMA4_IRQENABLE_L0);
+ val |= 1 << lch;
+ omap_writel(val, OMAP_DMA4_IRQENABLE_L0);
+}
+
+int omap_request_dma(int dev_id, const char *dev_name,
+ void (* callback)(int lch, u16 ch_status, void *data),
+ void *data, int *dma_ch_out)
+{
+ int ch, free_ch = -1;
+ unsigned long flags;
+ struct omap_dma_lch *chan;
+
+ spin_lock_irqsave(&dma_chan_lock, flags);
+ 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;
+ }
+ }
+ if (free_ch == -1) {
+ spin_unlock_irqrestore(&dma_chan_lock, flags);
+ return -EBUSY;
+ }
+ chan = dma_chan + free_ch;
+ chan->dev_id = dev_id;
+
+ if (cpu_class_is_omap1())
+ clear_lch_regs(free_ch);
+
+ if (cpu_is_omap24xx())
+ omap_clear_dma(free_ch);
+
+ spin_unlock_irqrestore(&dma_chan_lock, flags);
+
+ chan->dev_name = dev_name;
+ chan->callback = callback;
+ chan->data = data;
+ chan->enabled_irqs = OMAP_DMA_TOUT_IRQ | OMAP_DMA_DROP_IRQ |
+ OMAP_DMA_BLOCK_IRQ;
+
+ if (cpu_is_omap24xx())
+ chan->enabled_irqs |= OMAP2_DMA_TRANS_ERR_IRQ;
+
+ if (cpu_is_omap16xx()) {
+ /* If the sync device is set, configure it dynamically. */
+ if (dev_id != 0) {
+ set_gdma_dev(free_ch + 1, dev_id);
+ dev_id = free_ch + 1;
+ }
+ /* Disable the 1510 compatibility mode and set the sync device
+ * id. */
+ OMAP_DMA_CCR_REG(free_ch) = dev_id | (1 << 10);
+ } else if (cpu_is_omap730() || cpu_is_omap15xx()) {
+ OMAP_DMA_CCR_REG(free_ch) = dev_id;
+ }
+
+ if (cpu_is_omap24xx()) {
+ omap2_enable_irq_lch(free_ch);
+
+ omap_enable_channel_irq(free_ch);
+ /* Clear the CSR register and IRQ status register */
+ OMAP_DMA_CSR_REG(free_ch) = 0x0;
+ omap_writel(~0x0, OMAP_DMA4_IRQSTATUS_L0);
+ }
+
+ *dma_ch_out = free_ch;
+
+ return 0;
+}
+
+void omap_free_dma(int lch)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dma_chan_lock, flags);
+ if (dma_chan[lch].dev_id == -1) {
+ printk("omap_dma: trying to free nonallocated DMA channel %d\n",
+ lch);
+ spin_unlock_irqrestore(&dma_chan_lock, flags);
+ return;
+ }
+ dma_chan[lch].dev_id = -1;
+ dma_chan[lch].next_lch = -1;
+ dma_chan[lch].callback = NULL;
+ spin_unlock_irqrestore(&dma_chan_lock, flags);
+
+ if (cpu_class_is_omap1()) {
+ /* Disable all DMA interrupts for the channel. */
+ OMAP_DMA_CICR_REG(lch) = 0;
+ /* Make sure the DMA transfer is stopped. */
+ OMAP_DMA_CCR_REG(lch) = 0;
+ }
+
+ if (cpu_is_omap24xx()) {
+ u32 val;
+ /* Disable interrupts */
+ val = omap_readl(OMAP_DMA4_IRQENABLE_L0);
+ val &= ~(1 << lch);
+ omap_writel(val, OMAP_DMA4_IRQENABLE_L0);
+
+ /* Clear the CSR register and IRQ status register */
+ OMAP_DMA_CSR_REG(lch) = 0x0;
+
+ val = omap_readl(OMAP_DMA4_IRQSTATUS_L0);
+ val |= 1 << lch;
+ omap_writel(val, OMAP_DMA4_IRQSTATUS_L0);
+
+ /* Disable all DMA interrupts for the channel. */
+ OMAP_DMA_CICR_REG(lch) = 0;
+
+ /* Make sure the DMA transfer is stopped. */
+ OMAP_DMA_CCR_REG(lch) = 0;
+ omap_clear_dma(lch);
+ }
+}
+
+/*
+ * Clears any DMA state so the DMA engine is ready to restart with new buffers
+ * through omap_start_dma(). Any buffers in flight are discarded.
+ */
+void omap_clear_dma(int lch)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ if (cpu_class_is_omap1()) {
+ int status;
+ OMAP_DMA_CCR_REG(lch) &= ~OMAP_DMA_CCR_EN;
+
+ /* Clear pending interrupts */
+ status = OMAP_DMA_CSR_REG(lch);
+ }
+
+ if (cpu_is_omap24xx()) {
+ int i;
+ u32 lch_base = OMAP24XX_DMA_BASE + lch * 0x60 + 0x80;
+ for (i = 0; i < 0x44; i += 4)
+ omap_writel(0, lch_base + i);
+ }
+
+ local_irq_restore(flags);
+}
+
+void omap_start_dma(int lch)
+{
if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) {
int next_lch, cur_lch;
char dma_chan_link_map[OMAP_LOGICAL_DMA_CH_COUNT];
do {
next_lch = dma_chan[cur_lch].next_lch;
- /* The loop case: we've been here already */
+ /* The loop case: we've been here already */
if (dma_chan_link_map[cur_lch])
break;
/* Mark the current channel */
dma_chan_link_map[cur_lch] = 1;
enable_lnk(cur_lch);
- init_intr(cur_lch);
+ omap_enable_channel_irq(cur_lch);
cur_lch = next_lch;
} while (next_lch != -1);
+ } else if (cpu_is_omap24xx()) {
+ /* Errata: Need to write lch even if not using chaining */
+ OMAP_DMA_CLNK_CTRL_REG(lch) = lch;
+ }
+
+ omap_enable_channel_irq(lch);
+
+ /* Errata: On ES2.0 BUFFERING disable must be set.
+ * This will always fail on ES1.0 */
+ if (cpu_is_omap24xx()) {
+ OMAP_DMA_CCR_REG(lch) |= OMAP_DMA_CCR_EN;
}
- init_intr(lch);
+ OMAP_DMA_CCR_REG(lch) |= OMAP_DMA_CCR_EN;
- w = omap_readw(OMAP_DMA_CCR(lch));
- w |= OMAP_DMA_CCR_EN;
- omap_writew(w, OMAP_DMA_CCR(lch));
dma_chan[lch].flags |= OMAP_DMA_ACTIVE;
}
void omap_stop_dma(int lch)
{
- u16 w;
-
if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) {
int next_lch, cur_lch = lch;
char dma_chan_link_map[OMAP_LOGICAL_DMA_CH_COUNT];
return;
}
+
/* Disable all interrupts on the channel */
- omap_writew(0, OMAP_DMA_CICR(lch));
+ if (cpu_class_is_omap1())
+ OMAP_DMA_CICR_REG(lch) = 0;
- w = omap_readw(OMAP_DMA_CCR(lch));
- w &= ~OMAP_DMA_CCR_EN;
- omap_writew(w, OMAP_DMA_CCR(lch));
+ OMAP_DMA_CCR_REG(lch) &= ~OMAP_DMA_CCR_EN;
dma_chan[lch].flags &= ~OMAP_DMA_ACTIVE;
}
-void omap_enable_dma_irq(int lch, u16 bits)
+/*
+ * Returns current physical source address for the given DMA channel.
+ * If the channel is running the caller must disable interrupts prior calling
+ * this function and process the returned value before re-enabling interrupt to
+ * prevent races with the interrupt handler. Note that in continuous mode there
+ * is a chance for CSSA_L register overflow inbetween the two reads resulting
+ * in incorrect return value.
+ */
+dma_addr_t omap_get_dma_src_pos(int lch)
{
- dma_chan[lch].enabled_irqs |= bits;
-}
+ dma_addr_t offset;
-void omap_disable_dma_irq(int lch, u16 bits)
-{
- dma_chan[lch].enabled_irqs &= ~bits;
-}
+ if (cpu_class_is_omap1())
+ offset = (dma_addr_t) (OMAP1_DMA_CSSA_L_REG(lch) |
+ (OMAP1_DMA_CSSA_U_REG(lch) << 16));
-static int dma_handle_ch(int ch)
-{
- u16 csr;
+ if (cpu_is_omap24xx())
+ offset = OMAP_DMA_CSAC_REG(lch);
- if (enable_1510_mode && ch >= 6) {
- csr = dma_chan[ch].saved_csr;
- dma_chan[ch].saved_csr = 0;
- } else
- csr = omap_readw(OMAP_DMA_CSR(ch));
- if (enable_1510_mode && ch <= 2 && (csr >> 7) != 0) {
- dma_chan[ch + 6].saved_csr = csr >> 7;
- csr &= 0x7f;
- }
- if ((csr & 0x3f) == 0)
- return 0;
- if (unlikely(dma_chan[ch].dev_id == -1)) {
- printk(KERN_WARNING "Spurious interrupt from DMA channel %d (CSR %04x)\n",
- ch, csr);
- return 0;
- }
- if (unlikely(csr & OMAP_DMA_TOUT_IRQ))
- printk(KERN_WARNING "DMA timeout with device %d\n", dma_chan[ch].dev_id);
- if (unlikely(csr & OMAP_DMA_DROP_IRQ))
- printk(KERN_WARNING "DMA synchronization event drop occurred with device %d\n",
- dma_chan[ch].dev_id);
- if (likely(csr & OMAP_DMA_BLOCK_IRQ))
- dma_chan[ch].flags &= ~OMAP_DMA_ACTIVE;
- if (likely(dma_chan[ch].callback != NULL))
- dma_chan[ch].callback(ch, csr, dma_chan[ch].data);
- return 1;
+ return offset;
}
-static irqreturn_t dma_irq_handler(int irq, void *dev_id, struct pt_regs *regs)
+/*
+ * Returns current physical destination address for the given DMA channel.
+ * If the channel is running the caller must disable interrupts prior calling
+ * this function and process the returned value before re-enabling interrupt to
+ * prevent races with the interrupt handler. Note that in continuous mode there
+ * is a chance for CDSA_L register overflow inbetween the two reads resulting
+ * in incorrect return value.
+ */
+dma_addr_t omap_get_dma_dst_pos(int lch)
{
- int ch = ((int) dev_id) - 1;
- int handled = 0;
+ dma_addr_t offset;
- for (;;) {
- int handled_now = 0;
+ if (cpu_class_is_omap1())
+ offset = (dma_addr_t) (OMAP1_DMA_CDSA_L_REG(lch) |
+ (OMAP1_DMA_CDSA_U_REG(lch) << 16));
- handled_now += dma_handle_ch(ch);
- if (enable_1510_mode && dma_chan[ch + 6].saved_csr)
- handled_now += dma_handle_ch(ch + 6);
- if (!handled_now)
- break;
- handled += handled_now;
- }
+ if (cpu_is_omap24xx())
+ offset = OMAP2_DMA_CDSA_REG(lch);
- return handled ? IRQ_HANDLED : IRQ_NONE;
+ return offset;
}
-int omap_request_dma(int dev_id, const char *dev_name,
- void (* callback)(int lch, u16 ch_status, void *data),
- void *data, int *dma_ch_out)
+/*
+ * Returns current source transfer counting for the given DMA channel.
+ * Can be used to monitor the progress of a transfer inside a block.
+ * It must be called with disabled interrupts.
+ */
+int omap_get_dma_src_addr_counter(int lch)
{
- int ch, free_ch = -1;
- unsigned long flags;
- struct omap_dma_lch *chan;
-
- spin_lock_irqsave(&dma_chan_lock, flags);
- 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;
- }
- }
- if (free_ch == -1) {
- spin_unlock_irqrestore(&dma_chan_lock, flags);
- return -EBUSY;
- }
- chan = dma_chan + free_ch;
- chan->dev_id = dev_id;
- clear_lch_regs(free_ch);
- spin_unlock_irqrestore(&dma_chan_lock, flags);
-
- chan->dev_id = dev_id;
- chan->dev_name = dev_name;
- chan->callback = callback;
- chan->data = data;
- chan->enabled_irqs = OMAP_DMA_TOUT_IRQ | OMAP_DMA_DROP_IRQ | OMAP_DMA_BLOCK_IRQ;
-
- if (cpu_is_omap16xx()) {
- /* If the sync device is set, configure it dynamically. */
- if (dev_id != 0) {
- set_gdma_dev(free_ch + 1, dev_id);
- dev_id = free_ch + 1;
- }
- /* Disable the 1510 compatibility mode and set the sync device
- * id. */
- omap_writew(dev_id | (1 << 10), OMAP_DMA_CCR(free_ch));
- } else {
- omap_writew(dev_id, OMAP_DMA_CCR(free_ch));
- }
- *dma_ch_out = free_ch;
-
- return 0;
+ return (dma_addr_t) OMAP_DMA_CSAC_REG(lch);
}
-void omap_free_dma(int ch)
+int omap_dma_running(void)
{
- unsigned long flags;
+ int lch;
- spin_lock_irqsave(&dma_chan_lock, flags);
- if (dma_chan[ch].dev_id == -1) {
- printk("omap_dma: trying to free nonallocated DMA channel %d\n", ch);
- spin_unlock_irqrestore(&dma_chan_lock, flags);
- return;
- }
- dma_chan[ch].dev_id = -1;
- spin_unlock_irqrestore(&dma_chan_lock, flags);
+ /* Check if LCD DMA is running */
+ if (cpu_is_omap16xx())
+ if (omap_readw(OMAP1610_DMA_LCD_CCR) & OMAP_DMA_CCR_EN)
+ return 1;
- /* Disable all DMA interrupts for the channel. */
- omap_writew(0, OMAP_DMA_CICR(ch));
- /* Make sure the DMA transfer is stopped. */
- omap_writew(0, OMAP_DMA_CCR(ch));
-}
+ for (lch = 0; lch < dma_chan_count; lch++)
+ if (OMAP_DMA_CCR_REG(lch) & OMAP_DMA_CCR_EN)
+ return 1;
-int omap_dma_in_1510_mode(void)
-{
- return enable_1510_mode;
+ return 0;
}
/*
if ((dma_chan[lch_head].dev_id == -1) ||
(dma_chan[lch_queue].dev_id == -1)) {
- printk(KERN_ERR "omap_dma: trying to link non requested channels\n");
+ printk(KERN_ERR "omap_dma: trying to link "
+ "non requested channels\n");
dump_stack();
}
if (dma_chan[lch_head].next_lch != lch_queue ||
dma_chan[lch_head].next_lch == -1) {
- printk(KERN_ERR "omap_dma: trying to unlink non linked channels\n");
+ printk(KERN_ERR "omap_dma: trying to unlink "
+ "non linked channels\n");
dump_stack();
}
if ((dma_chan[lch_head].flags & OMAP_DMA_ACTIVE) ||
(dma_chan[lch_head].flags & OMAP_DMA_ACTIVE)) {
- printk(KERN_ERR "omap_dma: You need to stop the DMA channels before unlinking\n");
+ printk(KERN_ERR "omap_dma: You need to stop the DMA channels "
+ "before unlinking\n");
dump_stack();
}
dma_chan[lch_head].next_lch = -1;
}
+/*----------------------------------------------------------------------------*/
+
+#ifdef CONFIG_ARCH_OMAP1
+
+static int omap1_dma_handle_ch(int ch)
+{
+ u16 csr;
+
+ if (enable_1510_mode && ch >= 6) {
+ csr = dma_chan[ch].saved_csr;
+ dma_chan[ch].saved_csr = 0;
+ } else
+ csr = OMAP_DMA_CSR_REG(ch);
+ if (enable_1510_mode && ch <= 2 && (csr >> 7) != 0) {
+ dma_chan[ch + 6].saved_csr = csr >> 7;
+ csr &= 0x7f;
+ }
+ if ((csr & 0x3f) == 0)
+ return 0;
+ if (unlikely(dma_chan[ch].dev_id == -1)) {
+ printk(KERN_WARNING "Spurious interrupt from DMA channel "
+ "%d (CSR %04x)\n", ch, csr);
+ return 0;
+ }
+ if (unlikely(csr & OMAP_DMA_TOUT_IRQ))
+ printk(KERN_WARNING "DMA timeout with device %d\n",
+ dma_chan[ch].dev_id);
+ if (unlikely(csr & OMAP_DMA_DROP_IRQ))
+ printk(KERN_WARNING "DMA synchronization event drop occurred "
+ "with device %d\n", dma_chan[ch].dev_id);
+ if (likely(csr & OMAP_DMA_BLOCK_IRQ))
+ dma_chan[ch].flags &= ~OMAP_DMA_ACTIVE;
+ if (likely(dma_chan[ch].callback != NULL))
+ dma_chan[ch].callback(ch, csr, dma_chan[ch].data);
+ return 1;
+}
+
+static irqreturn_t omap1_dma_irq_handler(int irq, void *dev_id,
+ struct pt_regs *regs)
+{
+ int ch = ((int) dev_id) - 1;
+ int handled = 0;
+
+ for (;;) {
+ int handled_now = 0;
+
+ handled_now += omap1_dma_handle_ch(ch);
+ if (enable_1510_mode && dma_chan[ch + 6].saved_csr)
+ handled_now += omap1_dma_handle_ch(ch + 6);
+ if (!handled_now)
+ break;
+ handled += handled_now;
+ }
+
+ return handled ? IRQ_HANDLED : IRQ_NONE;
+}
+
+#else
+#define omap1_dma_irq_handler NULL
+#endif
+
+#ifdef CONFIG_ARCH_OMAP2
+
+static int omap2_dma_handle_ch(int ch)
+{
+ u32 status = OMAP_DMA_CSR_REG(ch);
+ u32 val;
+
+ if (!status)
+ return 0;
+ if (unlikely(dma_chan[ch].dev_id == -1))
+ return 0;
+ /* REVISIT: According to 24xx TRM, there's no TOUT_IE */
+ if (unlikely(status & OMAP_DMA_TOUT_IRQ))
+ printk(KERN_INFO "DMA timeout with device %d\n",
+ dma_chan[ch].dev_id);
+ if (unlikely(status & OMAP_DMA_DROP_IRQ))
+ printk(KERN_INFO
+ "DMA synchronization event drop occurred with device "
+ "%d\n", dma_chan[ch].dev_id);
+
+ if (unlikely(status & OMAP2_DMA_TRANS_ERR_IRQ))
+ printk(KERN_INFO "DMA transaction error with device %d\n",
+ dma_chan[ch].dev_id);
+
+ OMAP_DMA_CSR_REG(ch) = 0x20;
+
+ val = omap_readl(OMAP_DMA4_IRQSTATUS_L0);
+ /* ch in this function is from 0-31 while in register it is 1-32 */
+ val = 1 << (ch);
+ omap_writel(val, OMAP_DMA4_IRQSTATUS_L0);
+
+ if (likely(dma_chan[ch].callback != NULL))
+ dma_chan[ch].callback(ch, status, dma_chan[ch].data);
+
+ return 0;
+}
+
+/* STATUS register count is from 1-32 while our is 0-31 */
+static irqreturn_t omap2_dma_irq_handler(int irq, void *dev_id,
+ struct pt_regs *regs)
+{
+ u32 val;
+ int i;
+
+ val = omap_readl(OMAP_DMA4_IRQSTATUS_L0);
+
+ for (i = 1; i <= OMAP_LOGICAL_DMA_CH_COUNT; i++) {
+ int active = val & (1 << (i - 1));
+ if (active)
+ omap2_dma_handle_ch(i - 1);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static struct irqaction omap24xx_dma_irq = {
+ .name = "DMA",
+ .handler = omap2_dma_irq_handler,
+ .flags = SA_INTERRUPT
+};
+
+#else
+static struct irqaction omap24xx_dma_irq;
+#endif
+
+/*----------------------------------------------------------------------------*/
static struct lcd_dma_info {
spinlock_t lock;
/* Always set the source port as SDRAM for now*/
w &= ~(0x03 << 6);
if (lcd_dma.callback != NULL)
- w |= 1 << 1; /* Block interrupt enable */
+ w |= 1 << 1; /* Block interrupt enable */
else
w &= ~(1 << 1);
omap_writew(w, OMAP1610_DMA_LCD_CTRL);
omap_writew(fi, OMAP1610_DMA_LCD_SRC_FI_B1_L);
}
-static irqreturn_t lcd_dma_irq_handler(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t lcd_dma_irq_handler(int irq, void *dev_id,
+ struct pt_regs *regs)
{
u16 w;
return;
}
if (!enable_1510_mode)
- omap_writew(omap_readw(OMAP1610_DMA_LCD_CCR) & ~1, OMAP1610_DMA_LCD_CCR);
+ omap_writew(omap_readw(OMAP1610_DMA_LCD_CCR) & ~1,
+ OMAP1610_DMA_LCD_CCR);
lcd_dma.reserved = 0;
spin_unlock(&lcd_dma.lock);
}
omap_writew(w, OMAP1610_DMA_LCD_CTRL);
}
-/*
- * Clears any DMA state so the DMA engine is ready to restart with new buffers
- * through omap_start_dma(). Any buffers in flight are discarded.
- */
-void omap_clear_dma(int lch)
-{
- unsigned long flags;
- int status;
-
- local_irq_save(flags);
- omap_writew(omap_readw(OMAP_DMA_CCR(lch)) & ~OMAP_DMA_CCR_EN,
- OMAP_DMA_CCR(lch));
- status = OMAP_DMA_CSR(lch); /* clear pending interrupts */
- local_irq_restore(flags);
-}
-
-/*
- * Returns current physical source address for the given DMA channel.
- * If the channel is running the caller must disable interrupts prior calling
- * this function and process the returned value before re-enabling interrupt to
- * prevent races with the interrupt handler. Note that in continuous mode there
- * is a chance for CSSA_L register overflow inbetween the two reads resulting
- * in incorrect return value.
- */
-dma_addr_t omap_get_dma_src_pos(int lch)
+int omap_lcd_dma_ext_running(void)
{
- return (dma_addr_t) (omap_readw(OMAP_DMA_CSSA_L(lch)) |
- (omap_readw(OMAP_DMA_CSSA_U(lch)) << 16));
+ return lcd_dma.ext_ctrl && lcd_dma.active;
}
-/*
- * Returns current physical destination address for the given DMA channel.
- * If the channel is running the caller must disable interrupts prior calling
- * this function and process the returned value before re-enabling interrupt to
- * prevent races with the interrupt handler. Note that in continuous mode there
- * is a chance for CDSA_L register overflow inbetween the two reads resulting
- * in incorrect return value.
- */
-dma_addr_t omap_get_dma_dst_pos(int lch)
-{
- return (dma_addr_t) (omap_readw(OMAP_DMA_CDSA_L(lch)) |
- (omap_readw(OMAP_DMA_CDSA_U(lch)) << 16));
-}
-
-/*
- * Returns current source transfer counting for the given DMA channel.
- * Can be used to monitor the progress of a transfer inside a block.
- * It must be called with disabled interrupts.
- */
-int omap_get_dma_src_addr_counter(int lch)
-{
- return (dma_addr_t) omap_readw(OMAP_DMA_CSAC(lch));
-}
-
-int omap_dma_running(void)
-{
- int lch;
-
- /* Check if LCD DMA is running */
- if (cpu_is_omap16xx())
- if (omap_readw(OMAP1610_DMA_LCD_CCR) & OMAP_DMA_CCR_EN)
- return 1;
-
- for (lch = 0; lch < dma_chan_count; lch++) {
- u16 w;
-
- w = omap_readw(OMAP_DMA_CCR(lch));
- if (w & OMAP_DMA_CCR_EN)
- return 1;
- }
- return 0;
-}
+/*----------------------------------------------------------------------------*/
static int __init omap_init_dma(void)
{
int ch, r;
- if (cpu_is_omap1510()) {
- printk(KERN_INFO "DMA support for OMAP1510 initialized\n");
+ if (cpu_is_omap15xx()) {
+ printk(KERN_INFO "DMA support for OMAP15xx initialized\n");
dma_chan_count = 9;
enable_1510_mode = 1;
} else if (cpu_is_omap16xx() || cpu_is_omap730()) {
printk(KERN_INFO "OMAP DMA hardware version %d\n",
omap_readw(OMAP_DMA_HW_ID));
printk(KERN_INFO "DMA capabilities: %08x:%08x:%04x:%04x:%04x\n",
- (omap_readw(OMAP_DMA_CAPS_0_U) << 16) | omap_readw(OMAP_DMA_CAPS_0_L),
- (omap_readw(OMAP_DMA_CAPS_1_U) << 16) | omap_readw(OMAP_DMA_CAPS_1_L),
+ (omap_readw(OMAP_DMA_CAPS_0_U) << 16) |
+ omap_readw(OMAP_DMA_CAPS_0_L),
+ (omap_readw(OMAP_DMA_CAPS_1_U) << 16) |
+ omap_readw(OMAP_DMA_CAPS_1_L),
omap_readw(OMAP_DMA_CAPS_2), omap_readw(OMAP_DMA_CAPS_3),
omap_readw(OMAP_DMA_CAPS_4));
if (!enable_1510_mode) {
dma_chan_count = 16;
} else
dma_chan_count = 9;
+ } else if (cpu_is_omap24xx()) {
+ u8 revision = omap_readb(OMAP_DMA4_REVISION);
+ printk(KERN_INFO "OMAP DMA hardware revision %d.%d\n",
+ revision >> 4, revision & 0xf);
+ dma_chan_count = OMAP_LOGICAL_DMA_CH_COUNT;
} else {
dma_chan_count = 0;
return 0;
memset(&dma_chan, 0, sizeof(dma_chan));
for (ch = 0; ch < dma_chan_count; ch++) {
+ omap_clear_dma(ch);
dma_chan[ch].dev_id = -1;
dma_chan[ch].next_lch = -1;
if (ch >= 6 && enable_1510_mode)
continue;
- /* request_irq() doesn't like dev_id (ie. ch) being zero,
- * so we have to kludge around this. */
- r = request_irq(dma_irq[ch], dma_irq_handler, 0, "DMA",
- (void *) (ch + 1));
+ if (cpu_class_is_omap1()) {
+ /* request_irq() doesn't like dev_id (ie. ch) being
+ * zero, so we have to kludge around this. */
+ r = request_irq(omap1_dma_irq[ch],
+ omap1_dma_irq_handler, 0, "DMA",
+ (void *) (ch + 1));
+ if (r != 0) {
+ int i;
+
+ printk(KERN_ERR "unable to request IRQ %d "
+ "for DMA (error %d)\n",
+ omap1_dma_irq[ch], r);
+ for (i = 0; i < ch; i++)
+ free_irq(omap1_dma_irq[i],
+ (void *) (i + 1));
+ return r;
+ }
+ }
+ }
+
+ if (cpu_is_omap24xx())
+ setup_irq(INT_24XX_SDMA_IRQ0, &omap24xx_dma_irq);
+
+ /* FIXME: Update LCD DMA to work on 24xx */
+ if (cpu_class_is_omap1()) {
+ r = request_irq(INT_DMA_LCD, lcd_dma_irq_handler, 0,
+ "LCD DMA", NULL);
if (r != 0) {
int i;
- printk(KERN_ERR "unable to request IRQ %d for DMA (error %d)\n",
- dma_irq[ch], r);
- for (i = 0; i < ch; i++)
- free_irq(dma_irq[i], (void *) (i + 1));
+ printk(KERN_ERR "unable to request IRQ for LCD DMA "
+ "(error %d)\n", r);
+ for (i = 0; i < dma_chan_count; i++)
+ free_irq(omap1_dma_irq[i], (void *) (i + 1));
return r;
}
}
- r = request_irq(INT_DMA_LCD, lcd_dma_irq_handler, 0, "LCD DMA", NULL);
- if (r != 0) {
- int i;
- printk(KERN_ERR "unable to request IRQ for LCD DMA (error %d)\n", r);
- for (i = 0; i < dma_chan_count; i++)
- free_irq(dma_irq[i], (void *) (i + 1));
- return r;
- }
return 0;
}
arch_initcall(omap_init_dma);
-
EXPORT_SYMBOL(omap_get_dma_src_pos);
EXPORT_SYMBOL(omap_get_dma_dst_pos);
EXPORT_SYMBOL(omap_get_dma_src_addr_counter);
EXPORT_SYMBOL(omap_set_dma_dest_data_pack);
EXPORT_SYMBOL(omap_set_dma_dest_burst_mode);
+EXPORT_SYMBOL(omap_set_dma_params);
+
EXPORT_SYMBOL(omap_dma_link_lch);
EXPORT_SYMBOL(omap_dma_unlink_lch);
EXPORT_SYMBOL(omap_enable_lcd_dma);
EXPORT_SYMBOL(omap_setup_lcd_dma);
EXPORT_SYMBOL(omap_stop_lcd_dma);
+EXPORT_SYMBOL(omap_lcd_dma_ext_running);
EXPORT_SYMBOL(omap_set_lcd_dma_b1);
EXPORT_SYMBOL(omap_set_lcd_dma_single_transfer);
EXPORT_SYMBOL(omap_set_lcd_dma_ext_controller);
git.openpandora.org / pandora-kernel.git / blobdiff