diff options
Diffstat (limited to 'arch/arm/plat-omap/dma.c')
| -rw-r--r-- | arch/arm/plat-omap/dma.c | 737 |
1 files changed, 6 insertions, 731 deletions
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index c2baa8ede543..24770e5a5081 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -64,7 +64,9 @@ enum { DMA_CHAIN_STARTED, DMA_CHAIN_NOTSTARTED }; static struct omap_system_dma_plat_info *p; static struct omap_dma_dev_attr *d; - +static void omap_clear_dma(int lch); +static int omap_dma_set_prio_lch(int lch, unsigned char read_prio, + unsigned char write_prio); static int enable_1510_mode; static u32 errata; @@ -284,66 +286,6 @@ void omap_set_dma_transfer_params(int lch, int data_type, int elem_count, } EXPORT_SYMBOL(omap_set_dma_transfer_params); -void omap_set_dma_color_mode(int lch, enum omap_dma_color_mode mode, u32 color) -{ - BUG_ON(omap_dma_in_1510_mode()); - - if (dma_omap1()) { - u16 w; - - w = p->dma_read(CCR2, lch); - w &= ~0x03; - - switch (mode) { - case OMAP_DMA_CONSTANT_FILL: - w |= 0x01; - break; - case OMAP_DMA_TRANSPARENT_COPY: - w |= 0x02; - break; - case OMAP_DMA_COLOR_DIS: - break; - default: - BUG(); - } - p->dma_write(w, CCR2, lch); - - w = p->dma_read(LCH_CTRL, lch); - w &= ~0x0f; - /* Default is channel type 2D */ - if (mode) { - p->dma_write(color, COLOR, lch); - w |= 1; /* Channel type G */ - } - p->dma_write(w, LCH_CTRL, lch); - } - - if (dma_omap2plus()) { - u32 val; - - val = p->dma_read(CCR, lch); - val &= ~((1 << 17) | (1 << 16)); - - switch (mode) { - case OMAP_DMA_CONSTANT_FILL: - val |= 1 << 16; - break; - case OMAP_DMA_TRANSPARENT_COPY: - val |= 1 << 17; - break; - case OMAP_DMA_COLOR_DIS: - break; - default: - BUG(); - } - p->dma_write(val, CCR, lch); - - color &= 0xffffff; - p->dma_write(color, COLOR, lch); - } -} -EXPORT_SYMBOL(omap_set_dma_color_mode); - void omap_set_dma_write_mode(int lch, enum omap_dma_write_mode mode) { if (dma_omap2plus()) { @@ -417,16 +359,6 @@ void omap_set_dma_params(int lch, struct omap_dma_channel_params *params) } EXPORT_SYMBOL(omap_set_dma_params); -void omap_set_dma_src_index(int lch, int eidx, int fidx) -{ - if (dma_omap2plus()) - return; - - p->dma_write(eidx, CSEI, lch); - p->dma_write(fidx, CSFI, lch); -} -EXPORT_SYMBOL(omap_set_dma_src_index); - void omap_set_dma_src_data_pack(int lch, int enable) { u32 l; @@ -510,16 +442,6 @@ void omap_set_dma_dest_params(int lch, int dest_port, int dest_amode, } EXPORT_SYMBOL(omap_set_dma_dest_params); -void omap_set_dma_dest_index(int lch, int eidx, int fidx) -{ - if (dma_omap2plus()) - return; - - p->dma_write(eidx, CDEI, lch); - p->dma_write(fidx, CDFI, lch); -} -EXPORT_SYMBOL(omap_set_dma_dest_index); - void omap_set_dma_dest_data_pack(int lch, int enable) { u32 l; @@ -843,7 +765,7 @@ EXPORT_SYMBOL(omap_dma_set_global_params); * Both of the above can be set with one of the following values : * DMA_CH_PRIO_HIGH/DMA_CH_PRIO_LOW */ -int +static int omap_dma_set_prio_lch(int lch, unsigned char read_prio, unsigned char write_prio) { @@ -864,13 +786,13 @@ omap_dma_set_prio_lch(int lch, unsigned char read_prio, 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. */ -void omap_clear_dma(int lch) +static void omap_clear_dma(int lch) { unsigned long flags; @@ -878,7 +800,6 @@ void omap_clear_dma(int lch) p->clear_dma(lch); local_irq_restore(flags); } -EXPORT_SYMBOL(omap_clear_dma); void omap_start_dma(int lch) { @@ -1167,652 +1088,6 @@ void omap_dma_link_lch(int lch_head, int lch_queue) } EXPORT_SYMBOL(omap_dma_link_lch); -/* - * Once the DMA queue is stopped, we can destroy it. - */ -void omap_dma_unlink_lch(int lch_head, int lch_queue) -{ - if (omap_dma_in_1510_mode()) { - if (lch_head == lch_queue) { - p->dma_write(p->dma_read(CCR, lch_head) & ~(3 << 8), - CCR, lch_head); - return; - } - printk(KERN_ERR "DMA linking is not supported in 1510 mode\n"); - BUG(); - return; - } - - if (dma_chan[lch_head].next_lch != lch_queue || - dma_chan[lch_head].next_lch == -1) { - pr_err("omap_dma: trying to unlink non linked channels\n"); - dump_stack(); - } - - if ((dma_chan[lch_head].flags & OMAP_DMA_ACTIVE) || - (dma_chan[lch_queue].flags & OMAP_DMA_ACTIVE)) { - pr_err("omap_dma: You need to stop the DMA channels before unlinking\n"); - dump_stack(); - } - - dma_chan[lch_head].next_lch = -1; -} -EXPORT_SYMBOL(omap_dma_unlink_lch); - -#ifndef CONFIG_ARCH_OMAP1 -/* Create chain of DMA channesls */ -static void create_dma_lch_chain(int lch_head, int lch_queue) -{ - u32 l; - - /* 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; - } - - l = p->dma_read(CLNK_CTRL, lch_head); - l &= ~(0x1f); - l |= lch_queue; - p->dma_write(l, CLNK_CTRL, lch_head); - - l = p->dma_read(CLNK_CTRL, lch_queue); - l &= ~(0x1f); - l |= (dma_chan[lch_queue].next_linked_ch); - p->dma_write(l, CLNK_CTRL, lch_queue); -} - -/** - * @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 - Success : 0 - * Failure: -EINVAL/-ENOMEM - */ -int omap_request_dma_chain(int dev_id, const char *dev_name, - void (*callback) (int lch, 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 > dma_lch_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, NULL, &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]].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 >= dma_lch_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 >= dma_lch_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 >= dma_lch_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 : 0 - * 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 l, 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 >= dma_lch_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) - p->dma_write(src_start, CSSA, lch); - if (dest_start != 0) - p->dma_write(dest_start, CDSA, lch); - - /* Write the buffer size */ - p->dma_write(elem_count, CEN, lch); - p->dma_write(frame_count, CFN, lch); - - /* - * 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) & p->dma_read( - CCR, 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); - - l = p->dma_read(CCR, lch); - - if ((0 == (l & (1 << 24)))) - l &= ~(1 << 25); - else - l |= (1 << 25); - if (start_dma == 1) { - if (0 == (l & (1 << 7))) { - l |= (1 << 7); - dma_chan[lch].state = DMA_CH_STARTED; - pr_debug("starting %d\n", lch); - p->dma_write(l, CCR, lch); - } else - start_dma = 0; - } else { - if (0 == (l & (1 << 7))) - p->dma_write(l, CCR, lch); - } - dma_chan[lch].flags |= OMAP_DMA_ACTIVE; - } - } - - return 0; -} -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 l, i; - - if (unlikely((chain_id < 0 || chain_id >= dma_lch_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]); - } - - l = p->dma_read(CCR, channels[0]); - l |= (1 << 7); - dma_linked_lch[chain_id].chain_state = DMA_CHAIN_STARTED; - dma_chan[channels[0]].state = DMA_CH_STARTED; - - if ((0 == (l & (1 << 24)))) - l &= ~(1 << 25); - else - l |= (1 << 25); - p->dma_write(l, CCR, channels[0]); - - 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 l, i; - u32 sys_cf = 0; - - /* Check for input params */ - if (unlikely((chain_id < 0 || chain_id >= dma_lch_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; - - if (IS_DMA_ERRATA(DMA_ERRATA_i88)) { - sys_cf = p->dma_read(OCP_SYSCONFIG, 0); - l = sys_cf; - /* Middle mode reg set no Standby */ - l &= ~((1 << 12)|(1 << 13)); - p->dma_write(l, OCP_SYSCONFIG, 0); - } - - for (i = 0; i < dma_linked_lch[chain_id].no_of_lchs_linked; i++) { - - /* Stop the Channel transmission */ - l = p->dma_read(CCR, channels[i]); - l &= ~(1 << 7); - p->dma_write(l, CCR, channels[i]); - - /* 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); - - if (IS_DMA_ERRATA(DMA_ERRATA_i88)) - p->dma_write(sys_cf, OCP_SYSCONFIG, 0); - - 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 >= dma_lch_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 = p->dma_read(CCEN, lch); - *fi = p->dma_read(CCFN, 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 >= dma_lch_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 p->dma_read(CDAC, 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 >= dma_lch_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 p->dma_read(CSAC, lch); -} -EXPORT_SYMBOL(omap_get_dma_chain_src_pos); -#endif /* ifndef CONFIG_ARCH_OMAP1 */ - /*----------------------------------------------------------------------------*/ #ifdef CONFIG_ARCH_OMAP1 |