[PATCH] ARM: OMAP: Remove unused pieces of legacy DMA API
Tony Lindgren
tony at atomide.com
Thu Sep 18 10:28:30 PDT 2014
* Tony Lindgren <tony at atomide.com> [140916 17:37]:
> We're moving to the dmaengine API, so let's remove the unused
> pieces of the omap legacy DMA code to make sure we don't get
> any new users for these:
>
> omap_set_dma_color_mode
> omap_set_dma_src_index
> omap_set_dma_dest_index
> omap_dma_unlink_lch
> omap_clear_dma
> omap_dma_running
> omap_dma_set_prio_lch
> omap_set_dma_dst_endian_type
> omap_set_dma_src_endian_type
> omap_get_dma_index
> omap_dma_disable_irq
> omap_request_dma_chain
> omap_free_dma_chain
> omap_dma_chain_a_transfer
> omap_start_dma_chain_transfers
> omap_stop_dma_chain_transfers
> omap_get_dma_chain_index
> omap_get_dma_chain_dst_pos
> omap_get_dma_chain_src_pos
> omap_modify_dma_chain_params
> omap_dma_chain_status
>
> Cc: Russell King <rmk+kernel at arm.linux.org.uk>
> Signed-off-by: Tony Lindgren <tony at atomide.com>
Applying this into omap-for-v3.18/cleanup against v3.17-rc1.
This way we have an immutable commit in the unlikely case
there will be other DMA related changes conflicting with this.
Regards,
Tony
> --- 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
> --- a/include/linux/omap-dma.h
> +++ b/include/linux/omap-dma.h
> @@ -306,15 +306,12 @@ extern void omap_set_dma_transfer_params(int lch, int data_type,
> int elem_count, int frame_count,
> int sync_mode,
> int dma_trigger, int src_or_dst_synch);
> -extern void omap_set_dma_color_mode(int lch, enum omap_dma_color_mode mode,
> - u32 color);
> extern void omap_set_dma_write_mode(int lch, enum omap_dma_write_mode mode);
> extern void omap_set_dma_channel_mode(int lch, enum omap_dma_channel_mode mode);
>
> extern void omap_set_dma_src_params(int lch, int src_port, int src_amode,
> unsigned long src_start,
> int src_ei, int src_fi);
> -extern void omap_set_dma_src_index(int lch, int eidx, int fidx);
> extern void omap_set_dma_src_data_pack(int lch, int enable);
> extern void omap_set_dma_src_burst_mode(int lch,
> enum omap_dma_burst_mode burst_mode);
> @@ -322,7 +319,6 @@ extern void omap_set_dma_src_burst_mode(int lch,
> extern void omap_set_dma_dest_params(int lch, int dest_port, int dest_amode,
> unsigned long dest_start,
> int dst_ei, int dst_fi);
> -extern void omap_set_dma_dest_index(int lch, int eidx, int fidx);
> extern void omap_set_dma_dest_data_pack(int lch, int enable);
> extern void omap_set_dma_dest_burst_mode(int lch,
> enum omap_dma_burst_mode burst_mode);
> @@ -331,52 +327,19 @@ extern void omap_set_dma_params(int lch,
> struct omap_dma_channel_params *params);
>
> extern void omap_dma_link_lch(int lch_head, int lch_queue);
> -extern void omap_dma_unlink_lch(int lch_head, int lch_queue);
>
> extern int omap_set_dma_callback(int lch,
> void (*callback)(int lch, u16 ch_status, void *data),
> void *data);
> extern dma_addr_t omap_get_dma_src_pos(int lch);
> extern dma_addr_t omap_get_dma_dst_pos(int lch);
> -extern void omap_clear_dma(int lch);
> extern int omap_get_dma_active_status(int lch);
> extern int omap_dma_running(void);
> extern void omap_dma_set_global_params(int arb_rate, int max_fifo_depth,
> int tparams);
> -extern int omap_dma_set_prio_lch(int lch, unsigned char read_prio,
> - unsigned char write_prio);
> -extern void omap_set_dma_dst_endian_type(int lch, enum end_type etype);
> -extern void omap_set_dma_src_endian_type(int lch, enum end_type etype);
> -extern int omap_get_dma_index(int lch, int *ei, int *fi);
> -
> void omap_dma_global_context_save(void);
> void omap_dma_global_context_restore(void);
>
> -extern void omap_dma_disable_irq(int lch);
> -
> -/* Chaining APIs */
> -#ifndef CONFIG_ARCH_OMAP1
> -extern 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);
> -extern int omap_free_dma_chain(int chain_id);
> -extern int omap_dma_chain_a_transfer(int chain_id, int src_start,
> - int dest_start, int elem_count,
> - int frame_count, void *callbk_data);
> -extern int omap_start_dma_chain_transfers(int chain_id);
> -extern int omap_stop_dma_chain_transfers(int chain_id);
> -extern int omap_get_dma_chain_index(int chain_id, int *ei, int *fi);
> -extern int omap_get_dma_chain_dst_pos(int chain_id);
> -extern int omap_get_dma_chain_src_pos(int chain_id);
> -
> -extern int omap_modify_dma_chain_params(int chain_id,
> - struct omap_dma_channel_params params);
> -extern int omap_dma_chain_status(int chain_id);
> -#endif
> -
> #if defined(CONFIG_ARCH_OMAP1) && IS_ENABLED(CONFIG_FB_OMAP)
> #include <mach/lcd_dma.h>
> #else
> --
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