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@@ -6,7 +6,7 @@
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* DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz@nokia.com>
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* Graphics DMA and LCD DMA graphics tranformations
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* by Imre Deak <imre.deak@nokia.com>
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- * OMAP2 support Copyright (C) 2004-2005 Texas Instruments, Inc.
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+ * OMAP2/3 support Copyright (C) 2004-2007 Texas Instruments, Inc.
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* Merged to support both OMAP1 and OMAP2 by Tony Lindgren <tony@atomide.com>
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* Some functions based on earlier dma-omap.c Copyright (C) 2001 RidgeRun, Inc.
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*
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@@ -33,12 +33,14 @@
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#include <asm/arch/tc.h>
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-#define DEBUG_PRINTS
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-#undef DEBUG_PRINTS
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-#ifdef DEBUG_PRINTS
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-#define debug_printk(x) printk x
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-#else
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-#define debug_printk(x)
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+#undef DEBUG
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+
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+#ifndef CONFIG_ARCH_OMAP1
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+enum { DMA_CH_ALLOC_DONE, DMA_CH_PARAMS_SET_DONE, DMA_CH_STARTED,
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+ DMA_CH_QUEUED, DMA_CH_NOTSTARTED, DMA_CH_PAUSED, DMA_CH_LINK_ENABLED
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+};
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+
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+enum { DMA_CHAIN_STARTED, DMA_CHAIN_NOTSTARTED };
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#endif
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#define OMAP_DMA_ACTIVE 0x01
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@@ -57,9 +59,66 @@ struct omap_dma_lch {
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const char *dev_name;
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void (* callback)(int lch, u16 ch_status, void *data);
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void *data;
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+
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+#ifndef CONFIG_ARCH_OMAP1
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+ /* required for Dynamic chaining */
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+ int prev_linked_ch;
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+ int next_linked_ch;
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+ int state;
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+ int chain_id;
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+
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+ int status;
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+#endif
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long flags;
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};
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+#ifndef CONFIG_ARCH_OMAP1
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+struct dma_link_info {
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+ int *linked_dmach_q;
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+ int no_of_lchs_linked;
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+
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+ int q_count;
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+ int q_tail;
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+ int q_head;
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+
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+ int chain_state;
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+ int chain_mode;
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+
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+};
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+
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+static struct dma_link_info dma_linked_lch[OMAP_LOGICAL_DMA_CH_COUNT];
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+
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+/* Chain handling macros */
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+#define OMAP_DMA_CHAIN_QINIT(chain_id) \
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+ do { \
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+ dma_linked_lch[chain_id].q_head = \
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+ dma_linked_lch[chain_id].q_tail = \
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+ dma_linked_lch[chain_id].q_count = 0; \
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+ } while (0)
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+#define OMAP_DMA_CHAIN_QFULL(chain_id) \
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+ (dma_linked_lch[chain_id].no_of_lchs_linked == \
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+ dma_linked_lch[chain_id].q_count)
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+#define OMAP_DMA_CHAIN_QLAST(chain_id) \
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+ do { \
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+ ((dma_linked_lch[chain_id].no_of_lchs_linked-1) == \
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+ dma_linked_lch[chain_id].q_count) \
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+ } while (0)
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+#define OMAP_DMA_CHAIN_QEMPTY(chain_id) \
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+ (0 == dma_linked_lch[chain_id].q_count)
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+#define __OMAP_DMA_CHAIN_INCQ(end) \
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+ ((end) = ((end)+1) % dma_linked_lch[chain_id].no_of_lchs_linked)
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+#define OMAP_DMA_CHAIN_INCQHEAD(chain_id) \
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+ do { \
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+ __OMAP_DMA_CHAIN_INCQ(dma_linked_lch[chain_id].q_head); \
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+ dma_linked_lch[chain_id].q_count--; \
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+ } while (0)
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+
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+#define OMAP_DMA_CHAIN_INCQTAIL(chain_id) \
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+ do { \
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+ __OMAP_DMA_CHAIN_INCQ(dma_linked_lch[chain_id].q_tail); \
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+ dma_linked_lch[chain_id].q_count++; \
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+ } while (0)
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+#endif
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static int dma_chan_count;
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static spinlock_t dma_chan_lock;
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@@ -73,6 +132,10 @@ static const u8 omap1_dma_irq[OMAP_LOGICAL_DMA_CH_COUNT] = {
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INT_1610_DMA_CH14, INT_1610_DMA_CH15, INT_DMA_LCD
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};
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+static inline void disable_lnk(int lch);
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+static void omap_disable_channel_irq(int lch);
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+static inline void omap_enable_channel_irq(int lch);
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+
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#define REVISIT_24XX() printk(KERN_ERR "FIXME: no %s on 24xx\n", \
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__FUNCTION__);
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@@ -148,7 +211,7 @@ void omap_set_dma_priority(int lch, int dst_port, int priority)
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omap_writel(l, reg);
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}
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- if (cpu_is_omap24xx()) {
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+ if (cpu_class_is_omap2()) {
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if (priority)
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OMAP_DMA_CCR_REG(lch) |= (1 << 6);
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else
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@@ -173,7 +236,7 @@ void omap_set_dma_transfer_params(int lch, int data_type, int elem_count,
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OMAP1_DMA_CCR2_REG(lch) |= 1 << 2;
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}
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- if (cpu_is_omap24xx() && dma_trigger) {
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+ if (cpu_class_is_omap2() && dma_trigger) {
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u32 val = OMAP_DMA_CCR_REG(lch);
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val &= ~(3 << 19);
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@@ -213,7 +276,7 @@ void omap_set_dma_color_mode(int lch, enum omap_dma_color_mode mode, u32 color)
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BUG_ON(omap_dma_in_1510_mode());
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- if (cpu_is_omap24xx()) {
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+ if (cpu_class_is_omap2()) {
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REVISIT_24XX();
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return;
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}
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@@ -245,7 +308,7 @@ void omap_set_dma_color_mode(int lch, enum omap_dma_color_mode mode, u32 color)
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void omap_set_dma_write_mode(int lch, enum omap_dma_write_mode mode)
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{
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- if (cpu_is_omap24xx()) {
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+ if (cpu_class_is_omap2()) {
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OMAP_DMA_CSDP_REG(lch) &= ~(0x3 << 16);
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OMAP_DMA_CSDP_REG(lch) |= (mode << 16);
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}
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@@ -269,7 +332,7 @@ void omap_set_dma_src_params(int lch, int src_port, int src_amode,
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OMAP1_DMA_CSSA_L_REG(lch) = src_start;
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}
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- if (cpu_is_omap24xx())
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+ if (cpu_class_is_omap2())
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OMAP2_DMA_CSSA_REG(lch) = src_start;
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OMAP_DMA_CSEI_REG(lch) = src_ei;
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@@ -289,11 +352,14 @@ void omap_set_dma_params(int lch, struct omap_dma_channel_params * params)
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omap_set_dma_dest_params(lch, params->dst_port,
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params->dst_amode, params->dst_start,
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params->dst_ei, params->dst_fi);
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+ if (params->read_prio || params->write_prio)
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+ omap_dma_set_prio_lch(lch, params->read_prio,
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+ params->write_prio);
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}
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void omap_set_dma_src_index(int lch, int eidx, int fidx)
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{
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- if (cpu_is_omap24xx()) {
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+ if (cpu_class_is_omap2()) {
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REVISIT_24XX();
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return;
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}
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@@ -317,13 +383,13 @@ void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
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case OMAP_DMA_DATA_BURST_DIS:
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break;
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case OMAP_DMA_DATA_BURST_4:
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- if (cpu_is_omap24xx())
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+ if (cpu_class_is_omap2())
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burst = 0x1;
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else
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burst = 0x2;
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break;
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case OMAP_DMA_DATA_BURST_8:
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- if (cpu_is_omap24xx()) {
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+ if (cpu_class_is_omap2()) {
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burst = 0x2;
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break;
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}
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@@ -332,7 +398,7 @@ void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
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* fall through
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*/
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case OMAP_DMA_DATA_BURST_16:
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- if (cpu_is_omap24xx()) {
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+ if (cpu_class_is_omap2()) {
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burst = 0x3;
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break;
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}
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@@ -363,7 +429,7 @@ void omap_set_dma_dest_params(int lch, int dest_port, int dest_amode,
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OMAP1_DMA_CDSA_L_REG(lch) = dest_start;
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}
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- if (cpu_is_omap24xx())
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+ if (cpu_class_is_omap2())
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OMAP2_DMA_CDSA_REG(lch) = dest_start;
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OMAP_DMA_CDEI_REG(lch) = dst_ei;
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@@ -372,7 +438,7 @@ void omap_set_dma_dest_params(int lch, int dest_port, int dest_amode,
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void omap_set_dma_dest_index(int lch, int eidx, int fidx)
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{
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- if (cpu_is_omap24xx()) {
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+ if (cpu_class_is_omap2()) {
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REVISIT_24XX();
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return;
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}
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@@ -396,19 +462,19 @@ void omap_set_dma_dest_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
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case OMAP_DMA_DATA_BURST_DIS:
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break;
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case OMAP_DMA_DATA_BURST_4:
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- if (cpu_is_omap24xx())
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+ if (cpu_class_is_omap2())
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burst = 0x1;
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else
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burst = 0x2;
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break;
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case OMAP_DMA_DATA_BURST_8:
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- if (cpu_is_omap24xx())
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+ if (cpu_class_is_omap2())
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burst = 0x2;
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else
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burst = 0x3;
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break;
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case OMAP_DMA_DATA_BURST_16:
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- if (cpu_is_omap24xx()) {
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+ if (cpu_class_is_omap2()) {
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burst = 0x3;
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break;
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}
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@@ -430,7 +496,7 @@ static inline void omap_enable_channel_irq(int lch)
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/* Clear CSR */
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if (cpu_class_is_omap1())
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status = OMAP_DMA_CSR_REG(lch);
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- else if (cpu_is_omap24xx())
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+ else if (cpu_class_is_omap2())
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OMAP_DMA_CSR_REG(lch) = OMAP2_DMA_CSR_CLEAR_MASK;
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/* Enable some nice interrupts. */
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@@ -441,7 +507,7 @@ static inline void omap_enable_channel_irq(int lch)
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static void omap_disable_channel_irq(int lch)
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{
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- if (cpu_is_omap24xx())
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+ if (cpu_class_is_omap2())
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OMAP_DMA_CICR_REG(lch) = 0;
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}
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@@ -464,6 +530,12 @@ static inline void enable_lnk(int lch)
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if (dma_chan[lch].next_lch != -1)
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OMAP_DMA_CLNK_CTRL_REG(lch) =
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dma_chan[lch].next_lch | (1 << 15);
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+
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+#ifndef CONFIG_ARCH_OMAP1
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+ if (dma_chan[lch].next_linked_ch != -1)
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+ OMAP_DMA_CLNK_CTRL_REG(lch) =
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+ dma_chan[lch].next_linked_ch | (1 << 15);
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+#endif
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}
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static inline void disable_lnk(int lch)
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@@ -475,7 +547,7 @@ static inline void disable_lnk(int lch)
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OMAP_DMA_CLNK_CTRL_REG(lch) |= 1 << 14;
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}
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- if (cpu_is_omap24xx()) {
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+ if (cpu_class_is_omap2()) {
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omap_disable_channel_irq(lch);
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/* Clear the ENABLE_LNK bit */
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OMAP_DMA_CLNK_CTRL_REG(lch) &= ~(1 << 15);
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@@ -488,7 +560,7 @@ static inline void omap2_enable_irq_lch(int lch)
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{
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u32 val;
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- if (!cpu_is_omap24xx())
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+ if (!cpu_class_is_omap2())
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return;
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val = omap_readl(OMAP_DMA4_IRQENABLE_L0);
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@@ -522,7 +594,7 @@ int omap_request_dma(int dev_id, const char *dev_name,
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if (cpu_class_is_omap1())
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clear_lch_regs(free_ch);
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- if (cpu_is_omap24xx())
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+ if (cpu_class_is_omap2())
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omap_clear_dma(free_ch);
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spin_unlock_irqrestore(&dma_chan_lock, flags);
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@@ -530,11 +602,14 @@ int omap_request_dma(int dev_id, const char *dev_name,
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chan->dev_name = dev_name;
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chan->callback = callback;
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chan->data = data;
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+#ifndef CONFIG_ARCH_OMAP1
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+ chan->chain_id = -1;
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+#endif
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chan->enabled_irqs = OMAP_DMA_DROP_IRQ | OMAP_DMA_BLOCK_IRQ;
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if (cpu_class_is_omap1())
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chan->enabled_irqs |= OMAP1_DMA_TOUT_IRQ;
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- else if (cpu_is_omap24xx())
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+ else if (cpu_class_is_omap2())
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chan->enabled_irqs |= OMAP2_DMA_MISALIGNED_ERR_IRQ |
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OMAP2_DMA_TRANS_ERR_IRQ;
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@@ -551,7 +626,7 @@ int omap_request_dma(int dev_id, const char *dev_name,
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OMAP_DMA_CCR_REG(free_ch) = dev_id;
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}
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- if (cpu_is_omap24xx()) {
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+ if (cpu_class_is_omap2()) {
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omap2_enable_irq_lch(free_ch);
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omap_enable_channel_irq(free_ch);
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@@ -588,7 +663,7 @@ void omap_free_dma(int lch)
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OMAP_DMA_CCR_REG(lch) = 0;
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}
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- if (cpu_is_omap24xx()) {
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+ if (cpu_class_is_omap2()) {
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u32 val;
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/* Disable interrupts */
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val = omap_readl(OMAP_DMA4_IRQENABLE_L0);
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@@ -608,6 +683,67 @@ void omap_free_dma(int lch)
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}
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}
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+/**
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+ * @brief omap_dma_set_global_params : Set global priority settings for dma
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+ *
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+ * @param arb_rate
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+ * @param max_fifo_depth
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+ * @param tparams - Number of thereads to reserve : DMA_THREAD_RESERVE_NORM
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+ * DMA_THREAD_RESERVE_ONET
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+ * DMA_THREAD_RESERVE_TWOT
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+ * DMA_THREAD_RESERVE_THREET
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+ */
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+void
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+omap_dma_set_global_params(int arb_rate, int max_fifo_depth, int tparams)
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+{
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+ u32 reg;
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+
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+ if (!cpu_class_is_omap2()) {
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+ printk(KERN_ERR "FIXME: no %s on 15xx/16xx\n", __FUNCTION__);
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+ return;
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+ }
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+
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+ if (arb_rate == 0)
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+ arb_rate = 1;
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+
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+ reg = (arb_rate & 0xff) << 16;
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+ reg |= (0xff & max_fifo_depth);
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+
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+ omap_writel(reg, OMAP_DMA4_GCR_REG);
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+}
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+EXPORT_SYMBOL(omap_dma_set_global_params);
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+
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+/**
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+ * @brief omap_dma_set_prio_lch : Set channel wise priority settings
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+ *
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+ * @param lch
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+ * @param read_prio - Read priority
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+ * @param write_prio - Write priority
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+ * Both of the above can be set with one of the following values :
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+ * DMA_CH_PRIO_HIGH/DMA_CH_PRIO_LOW
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+ */
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+int
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+omap_dma_set_prio_lch(int lch, unsigned char read_prio,
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+ unsigned char write_prio)
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+{
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+ u32 w;
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+
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+ if (unlikely((lch < 0 || lch >= OMAP_LOGICAL_DMA_CH_COUNT))) {
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+ printk(KERN_ERR "Invalid channel id\n");
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+ return -EINVAL;
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|
|
+ }
|
|
|
+ w = OMAP_DMA_CCR_REG(lch);
|
|
|
+ w &= ~((1 << 6) | (1 << 26));
|
|
|
+ if (cpu_is_omap2430() || cpu_is_omap34xx())
|
|
|
+ w |= ((read_prio & 0x1) << 6) | ((write_prio & 0x1) << 26);
|
|
|
+ else
|
|
|
+ w |= ((read_prio & 0x1) << 6);
|
|
|
+
|
|
|
+ OMAP_DMA_CCR_REG(lch) = w;
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(omap_dma_set_prio_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.
|
|
@@ -626,9 +762,9 @@ void omap_clear_dma(int lch)
|
|
|
status = OMAP_DMA_CSR_REG(lch);
|
|
|
}
|
|
|
|
|
|
- if (cpu_is_omap24xx()) {
|
|
|
+ if (cpu_class_is_omap2()) {
|
|
|
int i;
|
|
|
- u32 lch_base = OMAP24XX_DMA_BASE + lch * 0x60 + 0x80;
|
|
|
+ u32 lch_base = OMAP_DMA4_BASE + lch * 0x60 + 0x80;
|
|
|
for (i = 0; i < 0x44; i += 4)
|
|
|
omap_writel(0, lch_base + i);
|
|
|
}
|
|
@@ -662,7 +798,7 @@ void omap_start_dma(int lch)
|
|
|
|
|
|
cur_lch = next_lch;
|
|
|
} while (next_lch != -1);
|
|
|
- } else if (cpu_is_omap24xx()) {
|
|
|
+ } else if (cpu_class_is_omap2()) {
|
|
|
/* Errata: Need to write lch even if not using chaining */
|
|
|
OMAP_DMA_CLNK_CTRL_REG(lch) = lch;
|
|
|
}
|
|
@@ -753,7 +889,7 @@ dma_addr_t omap_get_dma_src_pos(int lch)
|
|
|
offset = (dma_addr_t) (OMAP1_DMA_CSSA_L_REG(lch) |
|
|
|
(OMAP1_DMA_CSSA_U_REG(lch) << 16));
|
|
|
|
|
|
- if (cpu_is_omap24xx())
|
|
|
+ if (cpu_class_is_omap2())
|
|
|
offset = OMAP_DMA_CSAC_REG(lch);
|
|
|
|
|
|
return offset;
|
|
@@ -775,8 +911,8 @@ dma_addr_t omap_get_dma_dst_pos(int lch)
|
|
|
offset = (dma_addr_t) (OMAP1_DMA_CDSA_L_REG(lch) |
|
|
|
(OMAP1_DMA_CDSA_U_REG(lch) << 16));
|
|
|
|
|
|
- if (cpu_is_omap24xx())
|
|
|
- offset = OMAP2_DMA_CDSA_REG(lch);
|
|
|
+ if (cpu_class_is_omap2())
|
|
|
+ offset = OMAP_DMA_CDAC_REG(lch);
|
|
|
|
|
|
return offset;
|
|
|
}
|
|
@@ -859,6 +995,605 @@ void omap_dma_unlink_lch (int lch_head, int lch_queue)
|
|
|
dma_chan[lch_head].next_lch = -1;
|
|
|
}
|
|
|
|
|
|
+#ifndef CONFIG_ARCH_OMAP1
|
|
|
+/* Create chain of DMA channesls */
|
|
|
+static void create_dma_lch_chain(int lch_head, int lch_queue)
|
|
|
+{
|
|
|
+ u32 w;
|
|
|
+
|
|
|
+ /* Check if this is the first link in chain */
|
|
|
+ if (dma_chan[lch_head].next_linked_ch == -1) {
|
|
|
+ dma_chan[lch_head].next_linked_ch = lch_queue;
|
|
|
+ dma_chan[lch_head].prev_linked_ch = lch_queue;
|
|
|
+ dma_chan[lch_queue].next_linked_ch = lch_head;
|
|
|
+ dma_chan[lch_queue].prev_linked_ch = lch_head;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* a link exists, link the new channel in circular chain */
|
|
|
+ else {
|
|
|
+ dma_chan[lch_queue].next_linked_ch =
|
|
|
+ dma_chan[lch_head].next_linked_ch;
|
|
|
+ dma_chan[lch_queue].prev_linked_ch = lch_head;
|
|
|
+ dma_chan[lch_head].next_linked_ch = lch_queue;
|
|
|
+ dma_chan[dma_chan[lch_queue].next_linked_ch].prev_linked_ch =
|
|
|
+ lch_queue;
|
|
|
+ }
|
|
|
+
|
|
|
+ w = OMAP_DMA_CLNK_CTRL_REG(lch_head);
|
|
|
+ w &= ~(0x0f);
|
|
|
+ w |= lch_queue;
|
|
|
+ OMAP_DMA_CLNK_CTRL_REG(lch_head) = w;
|
|
|
+
|
|
|
+ w = OMAP_DMA_CLNK_CTRL_REG(lch_queue);
|
|
|
+ w &= ~(0x0f);
|
|
|
+ w |= (dma_chan[lch_queue].next_linked_ch);
|
|
|
+ OMAP_DMA_CLNK_CTRL_REG(lch_queue) = w;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * @brief omap_request_dma_chain : Request a chain of DMA channels
|
|
|
+ *
|
|
|
+ * @param dev_id - Device id using the dma channel
|
|
|
+ * @param dev_name - Device name
|
|
|
+ * @param callback - Call back function
|
|
|
+ * @chain_id -
|
|
|
+ * @no_of_chans - Number of channels requested
|
|
|
+ * @chain_mode - Dynamic or static chaining : OMAP_DMA_STATIC_CHAIN
|
|
|
+ * OMAP_DMA_DYNAMIC_CHAIN
|
|
|
+ * @params - Channel parameters
|
|
|
+ *
|
|
|
+ * @return - Succes : 0
|
|
|
+ * Failure: -EINVAL/-ENOMEM
|
|
|
+ */
|
|
|
+int omap_request_dma_chain(int dev_id, const char *dev_name,
|
|
|
+ void (*callback) (int chain_id, u16 ch_status,
|
|
|
+ void *data),
|
|
|
+ int *chain_id, int no_of_chans, int chain_mode,
|
|
|
+ struct omap_dma_channel_params params)
|
|
|
+{
|
|
|
+ int *channels;
|
|
|
+ int i, err;
|
|
|
+
|
|
|
+ /* Is the chain mode valid ? */
|
|
|
+ if (chain_mode != OMAP_DMA_STATIC_CHAIN
|
|
|
+ && chain_mode != OMAP_DMA_DYNAMIC_CHAIN) {
|
|
|
+ printk(KERN_ERR "Invalid chain mode requested\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (unlikely((no_of_chans < 1
|
|
|
+ || no_of_chans > OMAP_LOGICAL_DMA_CH_COUNT))) {
|
|
|
+ printk(KERN_ERR "Invalid Number of channels requested\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Allocate a queue to maintain the status of the channels
|
|
|
+ * in the chain */
|
|
|
+ channels = kmalloc(sizeof(*channels) * no_of_chans, GFP_KERNEL);
|
|
|
+ if (channels == NULL) {
|
|
|
+ printk(KERN_ERR "omap_dma: No memory for channel queue\n");
|
|
|
+ return -ENOMEM;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* request and reserve DMA channels for the chain */
|
|
|
+ for (i = 0; i < no_of_chans; i++) {
|
|
|
+ err = omap_request_dma(dev_id, dev_name,
|
|
|
+ callback, 0, &channels[i]);
|
|
|
+ if (err < 0) {
|
|
|
+ int j;
|
|
|
+ for (j = 0; j < i; j++)
|
|
|
+ omap_free_dma(channels[j]);
|
|
|
+ kfree(channels);
|
|
|
+ printk(KERN_ERR "omap_dma: Request failed %d\n", err);
|
|
|
+ return err;
|
|
|
+ }
|
|
|
+ dma_chan[channels[i]].next_linked_ch = -1;
|
|
|
+ dma_chan[channels[i]].prev_linked_ch = -1;
|
|
|
+ dma_chan[channels[i]].state = DMA_CH_NOTSTARTED;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Allowing client drivers to set common parameters now,
|
|
|
+ * so that later only relevant (src_start, dest_start
|
|
|
+ * and element count) can be set
|
|
|
+ */
|
|
|
+ omap_set_dma_params(channels[i], ¶ms);
|
|
|
+ }
|
|
|
+
|
|
|
+ *chain_id = channels[0];
|
|
|
+ dma_linked_lch[*chain_id].linked_dmach_q = channels;
|
|
|
+ dma_linked_lch[*chain_id].chain_mode = chain_mode;
|
|
|
+ dma_linked_lch[*chain_id].chain_state = DMA_CHAIN_NOTSTARTED;
|
|
|
+ dma_linked_lch[*chain_id].no_of_lchs_linked = no_of_chans;
|
|
|
+
|
|
|
+ for (i = 0; i < no_of_chans; i++)
|
|
|
+ dma_chan[channels[i]].chain_id = *chain_id;
|
|
|
+
|
|
|
+ /* Reset the Queue pointers */
|
|
|
+ OMAP_DMA_CHAIN_QINIT(*chain_id);
|
|
|
+
|
|
|
+ /* Set up the chain */
|
|
|
+ if (no_of_chans == 1)
|
|
|
+ create_dma_lch_chain(channels[0], channels[0]);
|
|
|
+ else {
|
|
|
+ for (i = 0; i < (no_of_chans - 1); i++)
|
|
|
+ create_dma_lch_chain(channels[i], channels[i + 1]);
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(omap_request_dma_chain);
|
|
|
+
|
|
|
+/**
|
|
|
+ * @brief omap_modify_dma_chain_param : Modify the chain's params - Modify the
|
|
|
+ * params after setting it. Dont do this while dma is running!!
|
|
|
+ *
|
|
|
+ * @param chain_id - Chained logical channel id.
|
|
|
+ * @param params
|
|
|
+ *
|
|
|
+ * @return - Success : 0
|
|
|
+ * Failure : -EINVAL
|
|
|
+ */
|
|
|
+int omap_modify_dma_chain_params(int chain_id,
|
|
|
+ struct omap_dma_channel_params params)
|
|
|
+{
|
|
|
+ int *channels;
|
|
|
+ u32 i;
|
|
|
+
|
|
|
+ /* Check for input params */
|
|
|
+ if (unlikely((chain_id < 0
|
|
|
+ || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) {
|
|
|
+ printk(KERN_ERR "Invalid chain id\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Check if the chain exists */
|
|
|
+ if (dma_linked_lch[chain_id].linked_dmach_q == NULL) {
|
|
|
+ printk(KERN_ERR "Chain doesn't exists\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+ channels = dma_linked_lch[chain_id].linked_dmach_q;
|
|
|
+
|
|
|
+ for (i = 0; i < dma_linked_lch[chain_id].no_of_lchs_linked; i++) {
|
|
|
+ /*
|
|
|
+ * Allowing client drivers to set common parameters now,
|
|
|
+ * so that later only relevant (src_start, dest_start
|
|
|
+ * and element count) can be set
|
|
|
+ */
|
|
|
+ omap_set_dma_params(channels[i], ¶ms);
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(omap_modify_dma_chain_params);
|
|
|
+
|
|
|
+/**
|
|
|
+ * @brief omap_free_dma_chain - Free all the logical channels in a chain.
|
|
|
+ *
|
|
|
+ * @param chain_id
|
|
|
+ *
|
|
|
+ * @return - Success : 0
|
|
|
+ * Failure : -EINVAL
|
|
|
+ */
|
|
|
+int omap_free_dma_chain(int chain_id)
|
|
|
+{
|
|
|
+ int *channels;
|
|
|
+ u32 i;
|
|
|
+
|
|
|
+ /* Check for input params */
|
|
|
+ if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) {
|
|
|
+ printk(KERN_ERR "Invalid chain id\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Check if the chain exists */
|
|
|
+ if (dma_linked_lch[chain_id].linked_dmach_q == NULL) {
|
|
|
+ printk(KERN_ERR "Chain doesn't exists\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ channels = dma_linked_lch[chain_id].linked_dmach_q;
|
|
|
+ for (i = 0; i < dma_linked_lch[chain_id].no_of_lchs_linked; i++) {
|
|
|
+ dma_chan[channels[i]].next_linked_ch = -1;
|
|
|
+ dma_chan[channels[i]].prev_linked_ch = -1;
|
|
|
+ dma_chan[channels[i]].chain_id = -1;
|
|
|
+ dma_chan[channels[i]].state = DMA_CH_NOTSTARTED;
|
|
|
+ omap_free_dma(channels[i]);
|
|
|
+ }
|
|
|
+
|
|
|
+ kfree(channels);
|
|
|
+
|
|
|
+ dma_linked_lch[chain_id].linked_dmach_q = NULL;
|
|
|
+ dma_linked_lch[chain_id].chain_mode = -1;
|
|
|
+ dma_linked_lch[chain_id].chain_state = -1;
|
|
|
+ return (0);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(omap_free_dma_chain);
|
|
|
+
|
|
|
+/**
|
|
|
+ * @brief omap_dma_chain_status - Check if the chain is in
|
|
|
+ * active / inactive state.
|
|
|
+ * @param chain_id
|
|
|
+ *
|
|
|
+ * @return - Success : OMAP_DMA_CHAIN_ACTIVE/OMAP_DMA_CHAIN_INACTIVE
|
|
|
+ * Failure : -EINVAL
|
|
|
+ */
|
|
|
+int omap_dma_chain_status(int chain_id)
|
|
|
+{
|
|
|
+ /* Check for input params */
|
|
|
+ if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) {
|
|
|
+ printk(KERN_ERR "Invalid chain id\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Check if the chain exists */
|
|
|
+ if (dma_linked_lch[chain_id].linked_dmach_q == NULL) {
|
|
|
+ printk(KERN_ERR "Chain doesn't exists\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+ pr_debug("CHAINID=%d, qcnt=%d\n", chain_id,
|
|
|
+ dma_linked_lch[chain_id].q_count);
|
|
|
+
|
|
|
+ if (OMAP_DMA_CHAIN_QEMPTY(chain_id))
|
|
|
+ return OMAP_DMA_CHAIN_INACTIVE;
|
|
|
+ return OMAP_DMA_CHAIN_ACTIVE;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(omap_dma_chain_status);
|
|
|
+
|
|
|
+/**
|
|
|
+ * @brief omap_dma_chain_a_transfer - Get a free channel from a chain,
|
|
|
+ * set the params and start the transfer.
|
|
|
+ *
|
|
|
+ * @param chain_id
|
|
|
+ * @param src_start - buffer start address
|
|
|
+ * @param dest_start - Dest address
|
|
|
+ * @param elem_count
|
|
|
+ * @param frame_count
|
|
|
+ * @param callbk_data - channel callback parameter data.
|
|
|
+ *
|
|
|
+ * @return - Success : start_dma status
|
|
|
+ * Failure: -EINVAL/-EBUSY
|
|
|
+ */
|
|
|
+int omap_dma_chain_a_transfer(int chain_id, int src_start, int dest_start,
|
|
|
+ int elem_count, int frame_count, void *callbk_data)
|
|
|
+{
|
|
|
+ int *channels;
|
|
|
+ u32 w, lch;
|
|
|
+ int start_dma = 0;
|
|
|
+
|
|
|
+ /* if buffer size is less than 1 then there is
|
|
|
+ * no use of starting the chain */
|
|
|
+ if (elem_count < 1) {
|
|
|
+ printk(KERN_ERR "Invalid buffer size\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Check for input params */
|
|
|
+ if (unlikely((chain_id < 0
|
|
|
+ || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) {
|
|
|
+ printk(KERN_ERR "Invalid chain id\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Check if the chain exists */
|
|
|
+ if (dma_linked_lch[chain_id].linked_dmach_q == NULL) {
|
|
|
+ printk(KERN_ERR "Chain doesn't exist\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Check if all the channels in chain are in use */
|
|
|
+ if (OMAP_DMA_CHAIN_QFULL(chain_id))
|
|
|
+ return -EBUSY;
|
|
|
+
|
|
|
+ /* Frame count may be negative in case of indexed transfers */
|
|
|
+ channels = dma_linked_lch[chain_id].linked_dmach_q;
|
|
|
+
|
|
|
+ /* Get a free channel */
|
|
|
+ lch = channels[dma_linked_lch[chain_id].q_tail];
|
|
|
+
|
|
|
+ /* Store the callback data */
|
|
|
+ dma_chan[lch].data = callbk_data;
|
|
|
+
|
|
|
+ /* Increment the q_tail */
|
|
|
+ OMAP_DMA_CHAIN_INCQTAIL(chain_id);
|
|
|
+
|
|
|
+ /* Set the params to the free channel */
|
|
|
+ if (src_start != 0)
|
|
|
+ OMAP2_DMA_CSSA_REG(lch) = src_start;
|
|
|
+ if (dest_start != 0)
|
|
|
+ OMAP2_DMA_CDSA_REG(lch) = dest_start;
|
|
|
+
|
|
|
+ /* Write the buffer size */
|
|
|
+ OMAP_DMA_CEN_REG(lch) = elem_count;
|
|
|
+ OMAP_DMA_CFN_REG(lch) = frame_count;
|
|
|
+
|
|
|
+ /* If the chain is dynamically linked,
|
|
|
+ * then we may have to start the chain if its not active */
|
|
|
+ if (dma_linked_lch[chain_id].chain_mode == OMAP_DMA_DYNAMIC_CHAIN) {
|
|
|
+
|
|
|
+ /* In Dynamic chain, if the chain is not started,
|
|
|
+ * queue the channel */
|
|
|
+ if (dma_linked_lch[chain_id].chain_state ==
|
|
|
+ DMA_CHAIN_NOTSTARTED) {
|
|
|
+ /* Enable the link in previous channel */
|
|
|
+ if (dma_chan[dma_chan[lch].prev_linked_ch].state ==
|
|
|
+ DMA_CH_QUEUED)
|
|
|
+ enable_lnk(dma_chan[lch].prev_linked_ch);
|
|
|
+ dma_chan[lch].state = DMA_CH_QUEUED;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Chain is already started, make sure its active,
|
|
|
+ * if not then start the chain */
|
|
|
+ else {
|
|
|
+ start_dma = 1;
|
|
|
+
|
|
|
+ if (dma_chan[dma_chan[lch].prev_linked_ch].state ==
|
|
|
+ DMA_CH_STARTED) {
|
|
|
+ enable_lnk(dma_chan[lch].prev_linked_ch);
|
|
|
+ dma_chan[lch].state = DMA_CH_QUEUED;
|
|
|
+ start_dma = 0;
|
|
|
+ if (0 == ((1 << 7) & (OMAP_DMA_CCR_REG
|
|
|
+ (dma_chan[lch].prev_linked_ch)))) {
|
|
|
+ disable_lnk(dma_chan[lch].
|
|
|
+ prev_linked_ch);
|
|
|
+ pr_debug("\n prev ch is stopped\n");
|
|
|
+ start_dma = 1;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ else if (dma_chan[dma_chan[lch].prev_linked_ch].state
|
|
|
+ == DMA_CH_QUEUED) {
|
|
|
+ enable_lnk(dma_chan[lch].prev_linked_ch);
|
|
|
+ dma_chan[lch].state = DMA_CH_QUEUED;
|
|
|
+ start_dma = 0;
|
|
|
+ }
|
|
|
+ omap_enable_channel_irq(lch);
|
|
|
+
|
|
|
+ w = OMAP_DMA_CCR_REG(lch);
|
|
|
+
|
|
|
+ if ((0 == (w & (1 << 24))))
|
|
|
+ w &= ~(1 << 25);
|
|
|
+ else
|
|
|
+ w |= (1 << 25);
|
|
|
+ if (start_dma == 1) {
|
|
|
+ if (0 == (w & (1 << 7))) {
|
|
|
+ w |= (1 << 7);
|
|
|
+ dma_chan[lch].state = DMA_CH_STARTED;
|
|
|
+ pr_debug("starting %d\n", lch);
|
|
|
+ OMAP_DMA_CCR_REG(lch) = w;
|
|
|
+ } else
|
|
|
+ start_dma = 0;
|
|
|
+ } else {
|
|
|
+ if (0 == (w & (1 << 7)))
|
|
|
+ OMAP_DMA_CCR_REG(lch) = w;
|
|
|
+ }
|
|
|
+ dma_chan[lch].flags |= OMAP_DMA_ACTIVE;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return start_dma;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(omap_dma_chain_a_transfer);
|
|
|
+
|
|
|
+/**
|
|
|
+ * @brief omap_start_dma_chain_transfers - Start the chain
|
|
|
+ *
|
|
|
+ * @param chain_id
|
|
|
+ *
|
|
|
+ * @return - Success : 0
|
|
|
+ * Failure : -EINVAL/-EBUSY
|
|
|
+ */
|
|
|
+int omap_start_dma_chain_transfers(int chain_id)
|
|
|
+{
|
|
|
+ int *channels;
|
|
|
+ u32 w, i;
|
|
|
+
|
|
|
+ if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) {
|
|
|
+ printk(KERN_ERR "Invalid chain id\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ channels = dma_linked_lch[chain_id].linked_dmach_q;
|
|
|
+
|
|
|
+ if (dma_linked_lch[channels[0]].chain_state == DMA_CHAIN_STARTED) {
|
|
|
+ printk(KERN_ERR "Chain is already started\n");
|
|
|
+ return -EBUSY;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (dma_linked_lch[chain_id].chain_mode == OMAP_DMA_STATIC_CHAIN) {
|
|
|
+ for (i = 0; i < dma_linked_lch[chain_id].no_of_lchs_linked;
|
|
|
+ i++) {
|
|
|
+ enable_lnk(channels[i]);
|
|
|
+ omap_enable_channel_irq(channels[i]);
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ omap_enable_channel_irq(channels[0]);
|
|
|
+ }
|
|
|
+
|
|
|
+ w = OMAP_DMA_CCR_REG(channels[0]);
|
|
|
+ w |= (1 << 7);
|
|
|
+ dma_linked_lch[chain_id].chain_state = DMA_CHAIN_STARTED;
|
|
|
+ dma_chan[channels[0]].state = DMA_CH_STARTED;
|
|
|
+
|
|
|
+ if ((0 == (w & (1 << 24))))
|
|
|
+ w &= ~(1 << 25);
|
|
|
+ else
|
|
|
+ w |= (1 << 25);
|
|
|
+ OMAP_DMA_CCR_REG(channels[0]) = w;
|
|
|
+
|
|
|
+ dma_chan[channels[0]].flags |= OMAP_DMA_ACTIVE;
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(omap_start_dma_chain_transfers);
|
|
|
+
|
|
|
+/**
|
|
|
+ * @brief omap_stop_dma_chain_transfers - Stop the dma transfer of a chain.
|
|
|
+ *
|
|
|
+ * @param chain_id
|
|
|
+ *
|
|
|
+ * @return - Success : 0
|
|
|
+ * Failure : EINVAL
|
|
|
+ */
|
|
|
+int omap_stop_dma_chain_transfers(int chain_id)
|
|
|
+{
|
|
|
+ int *channels;
|
|
|
+ u32 w, i;
|
|
|
+ u32 sys_cf;
|
|
|
+
|
|
|
+ /* Check for input params */
|
|
|
+ if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) {
|
|
|
+ printk(KERN_ERR "Invalid chain id\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Check if the chain exists */
|
|
|
+ if (dma_linked_lch[chain_id].linked_dmach_q == NULL) {
|
|
|
+ printk(KERN_ERR "Chain doesn't exists\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+ channels = dma_linked_lch[chain_id].linked_dmach_q;
|
|
|
+
|
|
|
+ /* DMA Errata:
|
|
|
+ * Special programming model needed to disable DMA before end of block
|
|
|
+ */
|
|
|
+ sys_cf = omap_readl(OMAP_DMA4_OCP_SYSCONFIG);
|
|
|
+ w = sys_cf;
|
|
|
+ /* Middle mode reg set no Standby */
|
|
|
+ w &= ~((1 << 12)|(1 << 13));
|
|
|
+ omap_writel(w, OMAP_DMA4_OCP_SYSCONFIG);
|
|
|
+
|
|
|
+ for (i = 0; i < dma_linked_lch[chain_id].no_of_lchs_linked; i++) {
|
|
|
+
|
|
|
+ /* Stop the Channel transmission */
|
|
|
+ w = OMAP_DMA_CCR_REG(channels[i]);
|
|
|
+ w &= ~(1 << 7);
|
|
|
+ OMAP_DMA_CCR_REG(channels[i]) = w;
|
|
|
+
|
|
|
+ /* Disable the link in all the channels */
|
|
|
+ disable_lnk(channels[i]);
|
|
|
+ dma_chan[channels[i]].state = DMA_CH_NOTSTARTED;
|
|
|
+
|
|
|
+ }
|
|
|
+ dma_linked_lch[chain_id].chain_state = DMA_CHAIN_NOTSTARTED;
|
|
|
+
|
|
|
+ /* Reset the Queue pointers */
|
|
|
+ OMAP_DMA_CHAIN_QINIT(chain_id);
|
|
|
+
|
|
|
+ /* Errata - put in the old value */
|
|
|
+ omap_writel(sys_cf, OMAP_DMA4_OCP_SYSCONFIG);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(omap_stop_dma_chain_transfers);
|
|
|
+
|
|
|
+/* Get the index of the ongoing DMA in chain */
|
|
|
+/**
|
|
|
+ * @brief omap_get_dma_chain_index - Get the element and frame index
|
|
|
+ * of the ongoing DMA in chain
|
|
|
+ *
|
|
|
+ * @param chain_id
|
|
|
+ * @param ei - Element index
|
|
|
+ * @param fi - Frame index
|
|
|
+ *
|
|
|
+ * @return - Success : 0
|
|
|
+ * Failure : -EINVAL
|
|
|
+ */
|
|
|
+int omap_get_dma_chain_index(int chain_id, int *ei, int *fi)
|
|
|
+{
|
|
|
+ int lch;
|
|
|
+ int *channels;
|
|
|
+
|
|
|
+ /* Check for input params */
|
|
|
+ if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) {
|
|
|
+ printk(KERN_ERR "Invalid chain id\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Check if the chain exists */
|
|
|
+ if (dma_linked_lch[chain_id].linked_dmach_q == NULL) {
|
|
|
+ printk(KERN_ERR "Chain doesn't exists\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+ if ((!ei) || (!fi))
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ channels = dma_linked_lch[chain_id].linked_dmach_q;
|
|
|
+
|
|
|
+ /* Get the current channel */
|
|
|
+ lch = channels[dma_linked_lch[chain_id].q_head];
|
|
|
+
|
|
|
+ *ei = OMAP2_DMA_CCEN_REG(lch);
|
|
|
+ *fi = OMAP2_DMA_CCFN_REG(lch);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(omap_get_dma_chain_index);
|
|
|
+
|
|
|
+/**
|
|
|
+ * @brief omap_get_dma_chain_dst_pos - Get the destination position of the
|
|
|
+ * ongoing DMA in chain
|
|
|
+ *
|
|
|
+ * @param chain_id
|
|
|
+ *
|
|
|
+ * @return - Success : Destination position
|
|
|
+ * Failure : -EINVAL
|
|
|
+ */
|
|
|
+int omap_get_dma_chain_dst_pos(int chain_id)
|
|
|
+{
|
|
|
+ int lch;
|
|
|
+ int *channels;
|
|
|
+
|
|
|
+ /* Check for input params */
|
|
|
+ if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) {
|
|
|
+ printk(KERN_ERR "Invalid chain id\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Check if the chain exists */
|
|
|
+ if (dma_linked_lch[chain_id].linked_dmach_q == NULL) {
|
|
|
+ printk(KERN_ERR "Chain doesn't exists\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ channels = dma_linked_lch[chain_id].linked_dmach_q;
|
|
|
+
|
|
|
+ /* Get the current channel */
|
|
|
+ lch = channels[dma_linked_lch[chain_id].q_head];
|
|
|
+
|
|
|
+ return (OMAP_DMA_CDAC_REG(lch));
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(omap_get_dma_chain_dst_pos);
|
|
|
+
|
|
|
+/**
|
|
|
+ * @brief omap_get_dma_chain_src_pos - Get the source position
|
|
|
+ * of the ongoing DMA in chain
|
|
|
+ * @param chain_id
|
|
|
+ *
|
|
|
+ * @return - Success : Destination position
|
|
|
+ * Failure : -EINVAL
|
|
|
+ */
|
|
|
+int omap_get_dma_chain_src_pos(int chain_id)
|
|
|
+{
|
|
|
+ int lch;
|
|
|
+ int *channels;
|
|
|
+
|
|
|
+ /* Check for input params */
|
|
|
+ if (unlikely((chain_id < 0 || chain_id >= OMAP_LOGICAL_DMA_CH_COUNT))) {
|
|
|
+ printk(KERN_ERR "Invalid chain id\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Check if the chain exists */
|
|
|
+ if (dma_linked_lch[chain_id].linked_dmach_q == NULL) {
|
|
|
+ printk(KERN_ERR "Chain doesn't exists\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ channels = dma_linked_lch[chain_id].linked_dmach_q;
|
|
|
+
|
|
|
+ /* Get the current channel */
|
|
|
+ lch = channels[dma_linked_lch[chain_id].q_head];
|
|
|
+
|
|
|
+ return (OMAP_DMA_CSAC_REG(lch));
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(omap_get_dma_chain_src_pos);
|
|
|
+#endif
|
|
|
+
|
|
|
/*----------------------------------------------------------------------------*/
|
|
|
|
|
|
#ifdef CONFIG_ARCH_OMAP1
|
|
@@ -919,7 +1654,7 @@ static irqreturn_t omap1_dma_irq_handler(int irq, void *dev_id)
|
|
|
#define omap1_dma_irq_handler NULL
|
|
|
#endif
|
|
|
|
|
|
-#ifdef CONFIG_ARCH_OMAP2
|
|
|
+#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
|
|
|
|
|
|
static int omap2_dma_handle_ch(int ch)
|
|
|
{
|
|
@@ -953,8 +1688,33 @@ static int omap2_dma_handle_ch(int ch)
|
|
|
OMAP_DMA_CSR_REG(ch) = OMAP2_DMA_CSR_CLEAR_MASK;
|
|
|
omap_writel(1 << ch, OMAP_DMA4_IRQSTATUS_L0);
|
|
|
|
|
|
- if (likely(dma_chan[ch].callback != NULL))
|
|
|
- dma_chan[ch].callback(ch, status, dma_chan[ch].data);
|
|
|
+ /* If the ch is not chained then chain_id will be -1 */
|
|
|
+ if (dma_chan[ch].chain_id != -1) {
|
|
|
+ int chain_id = dma_chan[ch].chain_id;
|
|
|
+ dma_chan[ch].state = DMA_CH_NOTSTARTED;
|
|
|
+ if (OMAP_DMA_CLNK_CTRL_REG(ch) & (1 << 15))
|
|
|
+ dma_chan[dma_chan[ch].next_linked_ch].state =
|
|
|
+ DMA_CH_STARTED;
|
|
|
+ if (dma_linked_lch[chain_id].chain_mode ==
|
|
|
+ OMAP_DMA_DYNAMIC_CHAIN)
|
|
|
+ disable_lnk(ch);
|
|
|
+
|
|
|
+ if (!OMAP_DMA_CHAIN_QEMPTY(chain_id))
|
|
|
+ OMAP_DMA_CHAIN_INCQHEAD(chain_id);
|
|
|
+
|
|
|
+ status = OMAP_DMA_CSR_REG(ch);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (likely(dma_chan[ch].callback != NULL)) {
|
|
|
+ if (dma_chan[ch].chain_id != -1)
|
|
|
+ dma_chan[ch].callback(dma_chan[ch].chain_id, status,
|
|
|
+ dma_chan[ch].data);
|
|
|
+ else
|
|
|
+ dma_chan[ch].callback(ch, status, dma_chan[ch].data);
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ OMAP_DMA_CSR_REG(ch) = status;
|
|
|
|
|
|
return 0;
|
|
|
}
|
|
@@ -1385,7 +2145,7 @@ static int __init omap_init_dma(void)
|
|
|
w &= ~(1 << 8);
|
|
|
omap_writew(w, OMAP1610_DMA_LCD_CTRL);
|
|
|
}
|
|
|
- } else if (cpu_is_omap24xx()) {
|
|
|
+ } else if (cpu_class_is_omap2()) {
|
|
|
u8 revision = omap_readb(OMAP_DMA4_REVISION);
|
|
|
printk(KERN_INFO "OMAP DMA hardware revision %d.%d\n",
|
|
|
revision >> 4, revision & 0xf);
|
|
@@ -1428,7 +2188,11 @@ static int __init omap_init_dma(void)
|
|
|
}
|
|
|
}
|
|
|
|
|
|
- if (cpu_is_omap24xx())
|
|
|
+ if (cpu_is_omap2430() || cpu_is_omap34xx())
|
|
|
+ omap_dma_set_global_params(DMA_DEFAULT_ARB_RATE,
|
|
|
+ DMA_DEFAULT_FIFO_DEPTH, 0);
|
|
|
+
|
|
|
+ if (cpu_class_is_omap2())
|
|
|
setup_irq(INT_24XX_SDMA_IRQ0, &omap24xx_dma_irq);
|
|
|
|
|
|
/* FIXME: Update LCD DMA to work on 24xx */
|