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Commit d28c2b36 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Vinod Koul
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ARM: common: edma: Remove unused functions 

We no longer have users for these functions so they can be removed.
Remove also unused enums from the header file.
Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 696d8b70
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Showing with 0 additions and 409 deletions
arch/arm/common/edma.c
View file @ d28c2b36
......@@ -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);
......@@ -818,185 +762,10 @@ 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
......@@ -1016,110 +785,6 @@ dma_addr_t edma_get_position(unsigned slot, bool dst)
return edma_read(ctlr, offs);
}
/**
* 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
......@@ -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 */
......@@ -1401,27 +1046,6 @@ 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:
......
include/linux/platform_data/edma.h
View file @ d28c2b36
......@@ -72,20 +72,6 @@ struct edmacc_param {
#define EDMA_DMA_TC1_ERROR 3
#define EDMA_DMA_TC2_ERROR 4
enum address_mode {
INCR = 0,
FIFO = 1
};
enum fifo_width {
W8BIT = 0,
W16BIT = 1,
W32BIT = 2,
W64BIT = 3,
W128BIT = 4,
W256BIT = 5
};
enum dma_event_q {
EVENTQ_0 = 0,
EVENTQ_1 = 1,
......@@ -94,11 +80,6 @@ enum dma_event_q {
EVENTQ_DEFAULT = -1
};
enum sync_dimension {
ASYNC = 0,
ABSYNC = 1
};
#define EDMA_CTLR_CHAN(ctlr, chan) (((ctlr) << 16) | (chan))
#define EDMA_CTLR(i) ((i) >> 16)
#define EDMA_CHAN_SLOT(i) ((i) & 0xffff)
......@@ -121,22 +102,9 @@ void edma_free_channel(unsigned channel);
int edma_alloc_slot(unsigned ctlr, int slot);
void edma_free_slot(unsigned slot);
/* alloc/free a set of contiguous parameter RAM slots */
int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count);
int edma_free_cont_slots(unsigned slot, int count);
/* calls that operate on part of a parameter RAM slot */
void edma_set_src(unsigned slot, dma_addr_t src_port,
enum address_mode mode, enum fifo_width);
void edma_set_dest(unsigned slot, dma_addr_t dest_port,
enum address_mode mode, enum fifo_width);
dma_addr_t edma_get_position(unsigned slot, bool dst);
void edma_set_src_index(unsigned slot, s16 src_bidx, s16 src_cidx);
void edma_set_dest_index(unsigned slot, s16 dest_bidx, s16 dest_cidx);
void edma_set_transfer_params(unsigned slot, u16 acnt, u16 bcnt, u16 ccnt,
u16 bcnt_rld, enum sync_dimension sync_mode);
void edma_link(unsigned from, unsigned to);
void edma_unlink(unsigned from);
/* calls that operate on an entire parameter RAM slot */
void edma_write_slot(unsigned slot, const struct edmacc_param *params);
......@@ -146,7 +114,6 @@ void edma_read_slot(unsigned slot, struct edmacc_param *params);
int edma_start(unsigned channel);
void edma_stop(unsigned channel);
void edma_clean_channel(unsigned channel);
void edma_clear_event(unsigned channel);
void edma_pause(unsigned channel);
void edma_resume(unsigned channel);
......
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