diff options
Diffstat (limited to 'arch/arm/common')
| -rw-r--r-- | arch/arm/common/edma.c | 376 |
1 files changed, 0 insertions, 376 deletions
diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c index 56fc339571f9..e9c4cb16a47e 100644 --- a/arch/arm/common/edma.c +++ b/arch/arm/common/edma.c @@ -510,62 +510,6 @@ static irqreturn_t dma_ccerr_handler(int irq, void *data) return IRQ_HANDLED; } -static int reserve_contiguous_slots(int ctlr, unsigned int id, - unsigned int num_slots, - unsigned int start_slot) -{ - int i, j; - unsigned int count = num_slots; - int stop_slot = start_slot; - DECLARE_BITMAP(tmp_inuse, EDMA_MAX_PARAMENTRY); - - for (i = start_slot; i < edma_cc[ctlr]->num_slots; ++i) { - j = EDMA_CHAN_SLOT(i); - if (!test_and_set_bit(j, edma_cc[ctlr]->edma_inuse)) { - /* Record our current beginning slot */ - if (count == num_slots) - stop_slot = i; - - count--; - set_bit(j, tmp_inuse); - - if (count == 0) - break; - } else { - clear_bit(j, tmp_inuse); - - if (id == EDMA_CONT_PARAMS_FIXED_EXACT) { - stop_slot = i; - break; - } else { - count = num_slots; - } - } - } - - /* - * We have to clear any bits that we set - * if we run out parameter RAM slots, i.e we do find a set - * of contiguous parameter RAM slots but do not find the exact number - * requested as we may reach the total number of parameter RAM slots - */ - if (i == edma_cc[ctlr]->num_slots) - stop_slot = i; - - j = start_slot; - for_each_set_bit_from(j, tmp_inuse, stop_slot) - clear_bit(j, edma_cc[ctlr]->edma_inuse); - - if (count) - return -EBUSY; - - for (j = i - num_slots + 1; j <= i; ++j) - memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(j), - &dummy_paramset, PARM_SIZE); - - return EDMA_CTLR_CHAN(ctlr, i - num_slots + 1); -} - static int prepare_unused_channel_list(struct device *dev, void *data) { struct platform_device *pdev = to_platform_device(dev); @@ -818,186 +762,11 @@ void edma_free_slot(unsigned slot) } EXPORT_SYMBOL(edma_free_slot); - -/** - * edma_alloc_cont_slots- alloc contiguous parameter RAM slots - * The API will return the starting point of a set of - * contiguous parameter RAM slots that have been requested - * - * @id: can only be EDMA_CONT_PARAMS_ANY or EDMA_CONT_PARAMS_FIXED_EXACT - * or EDMA_CONT_PARAMS_FIXED_NOT_EXACT - * @count: number of contiguous Paramter RAM slots - * @slot - the start value of Parameter RAM slot that should be passed if id - * is EDMA_CONT_PARAMS_FIXED_EXACT or EDMA_CONT_PARAMS_FIXED_NOT_EXACT - * - * If id is EDMA_CONT_PARAMS_ANY then the API starts looking for a set of - * contiguous Parameter RAM slots from parameter RAM 64 in the case of - * DaVinci SOCs and 32 in the case of DA8xx SOCs. - * - * If id is EDMA_CONT_PARAMS_FIXED_EXACT then the API starts looking for a - * set of contiguous parameter RAM slots from the "slot" that is passed as an - * argument to the API. - * - * If id is EDMA_CONT_PARAMS_FIXED_NOT_EXACT then the API initially tries - * starts looking for a set of contiguous parameter RAMs from the "slot" - * that is passed as an argument to the API. On failure the API will try to - * find a set of contiguous Parameter RAM slots from the remaining Parameter - * RAM slots - */ -int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count) -{ - /* - * The start slot requested should be greater than - * the number of channels and lesser than the total number - * of slots - */ - if ((id != EDMA_CONT_PARAMS_ANY) && - (slot < edma_cc[ctlr]->num_channels || - slot >= edma_cc[ctlr]->num_slots)) - return -EINVAL; - - /* - * The number of parameter RAM slots requested cannot be less than 1 - * and cannot be more than the number of slots minus the number of - * channels - */ - if (count < 1 || count > - (edma_cc[ctlr]->num_slots - edma_cc[ctlr]->num_channels)) - return -EINVAL; - - switch (id) { - case EDMA_CONT_PARAMS_ANY: - return reserve_contiguous_slots(ctlr, id, count, - edma_cc[ctlr]->num_channels); - case EDMA_CONT_PARAMS_FIXED_EXACT: - case EDMA_CONT_PARAMS_FIXED_NOT_EXACT: - return reserve_contiguous_slots(ctlr, id, count, slot); - default: - return -EINVAL; - } - -} -EXPORT_SYMBOL(edma_alloc_cont_slots); - -/** - * edma_free_cont_slots - deallocate DMA parameter RAM slots - * @slot: first parameter RAM of a set of parameter RAM slots to be freed - * @count: the number of contiguous parameter RAM slots to be freed - * - * This deallocates the parameter RAM slots allocated by - * edma_alloc_cont_slots. - * Callers/applications need to keep track of sets of contiguous - * parameter RAM slots that have been allocated using the edma_alloc_cont_slots - * API. - * Callers are responsible for ensuring the slots are inactive, and will - * not be activated. - */ -int edma_free_cont_slots(unsigned slot, int count) -{ - unsigned ctlr, slot_to_free; - int i; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot < edma_cc[ctlr]->num_channels || - slot >= edma_cc[ctlr]->num_slots || - count < 1) - return -EINVAL; - - for (i = slot; i < slot + count; ++i) { - ctlr = EDMA_CTLR(i); - slot_to_free = EDMA_CHAN_SLOT(i); - - memcpy_toio(edmacc_regs_base[ctlr] + PARM_OFFSET(slot_to_free), - &dummy_paramset, PARM_SIZE); - clear_bit(slot_to_free, edma_cc[ctlr]->edma_inuse); - } - - return 0; -} -EXPORT_SYMBOL(edma_free_cont_slots); - /*-----------------------------------------------------------------------*/ /* Parameter RAM operations (i) -- read/write partial slots */ /** - * edma_set_src - set initial DMA source address in parameter RAM slot - * @slot: parameter RAM slot being configured - * @src_port: physical address of source (memory, controller FIFO, etc) - * @addressMode: INCR, except in very rare cases - * @fifoWidth: ignored unless @addressMode is FIFO, else specifies the - * width to use when addressing the fifo (e.g. W8BIT, W32BIT) - * - * Note that the source address is modified during the DMA transfer - * according to edma_set_src_index(). - */ -void edma_set_src(unsigned slot, dma_addr_t src_port, - enum address_mode mode, enum fifo_width width) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot < edma_cc[ctlr]->num_slots) { - unsigned int i = edma_parm_read(ctlr, PARM_OPT, slot); - - if (mode) { - /* set SAM and program FWID */ - i = (i & ~(EDMA_FWID)) | (SAM | ((width & 0x7) << 8)); - } else { - /* clear SAM */ - i &= ~SAM; - } - edma_parm_write(ctlr, PARM_OPT, slot, i); - - /* set the source port address - in source register of param structure */ - edma_parm_write(ctlr, PARM_SRC, slot, src_port); - } -} -EXPORT_SYMBOL(edma_set_src); - -/** - * edma_set_dest - set initial DMA destination address in parameter RAM slot - * @slot: parameter RAM slot being configured - * @dest_port: physical address of destination (memory, controller FIFO, etc) - * @addressMode: INCR, except in very rare cases - * @fifoWidth: ignored unless @addressMode is FIFO, else specifies the - * width to use when addressing the fifo (e.g. W8BIT, W32BIT) - * - * Note that the destination address is modified during the DMA transfer - * according to edma_set_dest_index(). - */ -void edma_set_dest(unsigned slot, dma_addr_t dest_port, - enum address_mode mode, enum fifo_width width) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot < edma_cc[ctlr]->num_slots) { - unsigned int i = edma_parm_read(ctlr, PARM_OPT, slot); - - if (mode) { - /* set DAM and program FWID */ - i = (i & ~(EDMA_FWID)) | (DAM | ((width & 0x7) << 8)); - } else { - /* clear DAM */ - i &= ~DAM; - } - edma_parm_write(ctlr, PARM_OPT, slot, i); - /* set the destination port address - in dest register of param structure */ - edma_parm_write(ctlr, PARM_DST, slot, dest_port); - } -} -EXPORT_SYMBOL(edma_set_dest); - -/** * edma_get_position - returns the current transfer point * @slot: parameter RAM slot being examined * @dst: true selects the dest position, false the source @@ -1017,110 +786,6 @@ dma_addr_t edma_get_position(unsigned slot, bool dst) } /** - * edma_set_src_index - configure DMA source address indexing - * @slot: parameter RAM slot being configured - * @src_bidx: byte offset between source arrays in a frame - * @src_cidx: byte offset between source frames in a block - * - * Offsets are specified to support either contiguous or discontiguous - * memory transfers, or repeated access to a hardware register, as needed. - * When accessing hardware registers, both offsets are normally zero. - */ -void edma_set_src_index(unsigned slot, s16 src_bidx, s16 src_cidx) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot < edma_cc[ctlr]->num_slots) { - edma_parm_modify(ctlr, PARM_SRC_DST_BIDX, slot, - 0xffff0000, src_bidx); - edma_parm_modify(ctlr, PARM_SRC_DST_CIDX, slot, - 0xffff0000, src_cidx); - } -} -EXPORT_SYMBOL(edma_set_src_index); - -/** - * edma_set_dest_index - configure DMA destination address indexing - * @slot: parameter RAM slot being configured - * @dest_bidx: byte offset between destination arrays in a frame - * @dest_cidx: byte offset between destination frames in a block - * - * Offsets are specified to support either contiguous or discontiguous - * memory transfers, or repeated access to a hardware register, as needed. - * When accessing hardware registers, both offsets are normally zero. - */ -void edma_set_dest_index(unsigned slot, s16 dest_bidx, s16 dest_cidx) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot < edma_cc[ctlr]->num_slots) { - edma_parm_modify(ctlr, PARM_SRC_DST_BIDX, slot, - 0x0000ffff, dest_bidx << 16); - edma_parm_modify(ctlr, PARM_SRC_DST_CIDX, slot, - 0x0000ffff, dest_cidx << 16); - } -} -EXPORT_SYMBOL(edma_set_dest_index); - -/** - * edma_set_transfer_params - configure DMA transfer parameters - * @slot: parameter RAM slot being configured - * @acnt: how many bytes per array (at least one) - * @bcnt: how many arrays per frame (at least one) - * @ccnt: how many frames per block (at least one) - * @bcnt_rld: used only for A-Synchronized transfers; this specifies - * the value to reload into bcnt when it decrements to zero - * @sync_mode: ASYNC or ABSYNC - * - * See the EDMA3 documentation to understand how to configure and link - * transfers using the fields in PaRAM slots. If you are not doing it - * all at once with edma_write_slot(), you will use this routine - * plus two calls each for source and destination, setting the initial - * address and saying how to index that address. - * - * An example of an A-Synchronized transfer is a serial link using a - * single word shift register. In that case, @acnt would be equal to - * that word size; the serial controller issues a DMA synchronization - * event to transfer each word, and memory access by the DMA transfer - * controller will be word-at-a-time. - * - * An example of an AB-Synchronized transfer is a device using a FIFO. - * In that case, @acnt equals the FIFO width and @bcnt equals its depth. - * The controller with the FIFO issues DMA synchronization events when - * the FIFO threshold is reached, and the DMA transfer controller will - * transfer one frame to (or from) the FIFO. It will probably use - * efficient burst modes to access memory. - */ -void edma_set_transfer_params(unsigned slot, - u16 acnt, u16 bcnt, u16 ccnt, - u16 bcnt_rld, enum sync_dimension sync_mode) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(slot); - slot = EDMA_CHAN_SLOT(slot); - - if (slot < edma_cc[ctlr]->num_slots) { - edma_parm_modify(ctlr, PARM_LINK_BCNTRLD, slot, - 0x0000ffff, bcnt_rld << 16); - if (sync_mode == ASYNC) - edma_parm_and(ctlr, PARM_OPT, slot, ~SYNCDIM); - else - edma_parm_or(ctlr, PARM_OPT, slot, SYNCDIM); - /* Set the acount, bcount, ccount registers */ - edma_parm_write(ctlr, PARM_A_B_CNT, slot, (bcnt << 16) | acnt); - edma_parm_write(ctlr, PARM_CCNT, slot, ccnt); - } -} -EXPORT_SYMBOL(edma_set_transfer_params); - -/** * edma_link - link one parameter RAM slot to another * @from: parameter RAM slot originating the link * @to: parameter RAM slot which is the link target @@ -1145,26 +810,6 @@ void edma_link(unsigned from, unsigned to) } EXPORT_SYMBOL(edma_link); -/** - * edma_unlink - cut link from one parameter RAM slot - * @from: parameter RAM slot originating the link - * - * The originating slot should not be part of any active DMA transfer. - * Its link is set to 0xffff. - */ -void edma_unlink(unsigned from) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(from); - from = EDMA_CHAN_SLOT(from); - - if (from >= edma_cc[ctlr]->num_slots) - return; - edma_parm_or(ctlr, PARM_LINK_BCNTRLD, from, 0xffff); -} -EXPORT_SYMBOL(edma_unlink); - /*-----------------------------------------------------------------------*/ /* Parameter RAM operations (ii) -- read/write whole parameter sets */ @@ -1402,27 +1047,6 @@ void edma_clean_channel(unsigned channel) EXPORT_SYMBOL(edma_clean_channel); /* - * edma_clear_event - clear an outstanding event on the DMA channel - * Arguments: - * channel - channel number - */ -void edma_clear_event(unsigned channel) -{ - unsigned ctlr; - - ctlr = EDMA_CTLR(channel); - channel = EDMA_CHAN_SLOT(channel); - - if (channel >= edma_cc[ctlr]->num_channels) - return; - if (channel < 32) - edma_write(ctlr, EDMA_ECR, BIT(channel)); - else - edma_write(ctlr, EDMA_ECRH, BIT(channel - 32)); -} -EXPORT_SYMBOL(edma_clear_event); - -/* * edma_assign_channel_eventq - move given channel to desired eventq * Arguments: * channel - channel number |