1 files changed, 591 insertions, 319 deletions

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index da7b65145658..f5cc21ad0956 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -6,6 +6,8 @@
  * 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.
@@ -31,8 +33,15 @@
 
 #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)
@@ -55,7 +64,7 @@ static int dma_chan_count;
 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] = {
+const static 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,
@@ -63,6 +72,20 @@ const static u8 dma_irq[OMAP_LOGICAL_DMA_CH_COUNT] = {
         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;
@@ -82,6 +105,9 @@ static inline void set_gdma_dev(int req, int dev)
         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)
 {
@@ -121,38 +147,62 @@ void omap_set_dma_priority(int dst_port, int priority)
 }
 
 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;
@@ -165,63 +215,84 @@ void omap_set_dma_color_mode(int lch, enum omap_dma_color_mode mode, u32 color)
         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
@@ -231,110 +302,283 @@ void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
         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;
+}
+
+void omap_enable_dma_irq(int lch, u16 bits)
+{
+        dma_chan[lch].enabled_irqs |= bits;
+}
 
-        /* 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_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);
 
-        /* And set the ENABLE_LNK bits */
+        /* 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];
@@ -348,31 +592,37 @@ void omap_start_dma(int lch)
                 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;
         }
 
-        init_intr(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;
+        }
+
+        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];
@@ -393,146 +643,83 @@ void omap_stop_dma(int lch)
 
                 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;
 }
 
 /*
@@ -550,7 +737,8 @@ void omap_dma_link_lch (int lch_head, int lch_queue)
 
         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();
         }
 
@@ -570,20 +758,149 @@ void omap_dma_unlink_lch (int lch_head, int lch_queue)
 
         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;
@@ -795,7 +1112,7 @@ static void set_b1_regs(void)
         /* 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);
@@ -814,7 +1131,8 @@ static void set_b1_regs(void)
         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;
 
@@ -870,7 +1188,8 @@ void omap_free_lcd_dma(void)
                 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);
 }
@@ -939,93 +1258,24 @@ void omap_stop_lcd_dma(void)
         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)
-{
-        return (dma_addr_t) (omap_readw(OMAP_DMA_CSSA_L(lch)) |
-        (omap_readw(OMAP_DMA_CSSA_U(lch)) << 16));
-}
-
-/*
- * 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) {
@@ -1038,6 +1288,11 @@ static int __init omap_init_dma(void)
                         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;
@@ -1049,41 +1304,56 @@ static int __init omap_init_dma(void)
         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);
@@ -1109,6 +1379,8 @@ EXPORT_SYMBOL(omap_set_dma_dest_index);
 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);