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[M487] Fix DMA channel over-allocate

pull/4608/head
ccli8 2017-04-20 15:13:06 +08:00
parent 5e9999424a
commit bea7548717
1 changed files with 19 additions and 28 deletions
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47
targets/TARGET_NUVOTON/TARGET_M480/dma_api.c
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@ -23,6 +23,10 @@
#include "nu_bitutil.h"
#include "dma.h"
#define NU_PDMA_CH_MAX PDMA_CH_MAX /* Specify maximum channels of PDMA */
#define NU_PDMA_CH_Pos 0 /* Specify first channel number of PDMA */
#define NU_PDMA_CH_Msk (((1 << NU_PDMA_CH_MAX) - 1) << NU_PDMA_CH_Pos)
struct nu_dma_chn_s {
void (*handler)(uint32_t, uint32_t);
uint32_t id;
@ -31,7 +35,7 @@ struct nu_dma_chn_s {
static int dma_inited = 0;
static uint32_t dma_chn_mask = 0;
static struct nu_dma_chn_s dma_chn_arr[PDMA_CH_MAX];
static struct nu_dma_chn_s dma_chn_arr[NU_PDMA_CH_MAX];
static void pdma_vec(void);
static const struct nu_modinit_s dma_modinit = {DMA_0, PDMA_MODULE, 0, 0, PDMA_RST, PDMA_IRQn, (void *) pdma_vec};
@ -44,7 +48,7 @@ void dma_init(void)
}
dma_inited = 1;
dma_chn_mask = 0;
dma_chn_mask = ~NU_PDMA_CH_Msk;
memset(dma_chn_arr, 0x00, sizeof (dma_chn_arr));
// Reset this module
@ -65,25 +69,12 @@ int dma_channel_allocate(uint32_t capabilities)
dma_init();
}
#if 1
int i = nu_cto(dma_chn_mask);
if (i != 32) {
dma_chn_mask |= 1 << i;
memset(dma_chn_arr + i, 0x00, sizeof (struct nu_dma_chn_s));
memset(dma_chn_arr + i - NU_PDMA_CH_Pos, 0x00, sizeof (struct nu_dma_chn_s));
return i;
}
#else
int i;
for (i = 0; i < PDMA_CH_MAX; i ++) {
if ((dma_chn_mask & (1 << i)) == 0) {
// Channel available
dma_chn_mask |= 1 << i;
memset(dma_chn_arr + i, 0x00, sizeof (struct nu_dma_chn_s));
return i;
}
}
#endif
// No channel available
return DMA_ERROR_OUT_OF_CHANNELS;
@ -102,9 +93,9 @@ void dma_set_handler(int channelid, uint32_t handler, uint32_t id, uint32_t even
{
MBED_ASSERT(dma_chn_mask & (1 << channelid));
dma_chn_arr[channelid].handler = (void (*)(uint32_t, uint32_t)) handler;
dma_chn_arr[channelid].id = id;
dma_chn_arr[channelid].event = event;
dma_chn_arr[channelid - NU_PDMA_CH_Pos].handler = (void (*)(uint32_t, uint32_t)) handler;
dma_chn_arr[channelid - NU_PDMA_CH_Pos].id = id;
dma_chn_arr[channelid - NU_PDMA_CH_Pos].event = event;
// Set interrupt vector if someone has removed it.
NVIC_SetVector(dma_modinit.irq_n, (uint32_t) dma_modinit.var);
@ -127,14 +118,14 @@ static void pdma_vec(void)
PDMA_CLR_ABORT_FLAG(abtsts);
while (abtsts) {
int chn_id = nu_ctz(abtsts);
int chn_id = nu_ctz(abtsts) - PDMA_ABTSTS_ABTIF0_Pos + NU_PDMA_CH_Pos;
if (dma_chn_mask & (1 << chn_id)) {
struct nu_dma_chn_s *dma_chn = dma_chn_arr + chn_id;
struct nu_dma_chn_s *dma_chn = dma_chn_arr + chn_id - NU_PDMA_CH_Pos;
if (dma_chn->handler && (dma_chn->event & DMA_EVENT_ABORT)) {
dma_chn->handler(dma_chn->id, DMA_EVENT_ABORT);
}
}
abtsts &= ~(1 << chn_id);
abtsts &= ~(1 << (chn_id - NU_PDMA_CH_Pos + PDMA_ABTSTS_ABTIF0_Pos));
}
}
@ -145,14 +136,14 @@ static void pdma_vec(void)
PDMA_CLR_TD_FLAG(tdsts);
while (tdsts) {
int chn_id = nu_ctz(tdsts);
int chn_id = nu_ctz(tdsts) - PDMA_TDSTS_TDIF0_Pos + NU_PDMA_CH_Pos;
if (dma_chn_mask & (1 << chn_id)) {
struct nu_dma_chn_s *dma_chn = dma_chn_arr + chn_id;
struct nu_dma_chn_s *dma_chn = dma_chn_arr + chn_id - NU_PDMA_CH_Pos;
if (dma_chn->handler && (dma_chn->event & DMA_EVENT_TRANSFER_DONE)) {
dma_chn->handler(dma_chn->id, DMA_EVENT_TRANSFER_DONE);
}
}
tdsts &= ~(1 << chn_id);
tdsts &= ~(1 << (chn_id - NU_PDMA_CH_Pos + PDMA_TDSTS_TDIF0_Pos));
}
}
@ -163,14 +154,14 @@ static void pdma_vec(void)
PDMA->INTSTS = reqto;
while (reqto) {
int chn_id = nu_ctz(reqto) - PDMA_INTSTS_REQTOF0_Pos;
int chn_id = nu_ctz(reqto) - PDMA_INTSTS_REQTOF0_Pos + NU_PDMA_CH_Pos;
if (dma_chn_mask & (1 << chn_id)) {
struct nu_dma_chn_s *dma_chn = dma_chn_arr + chn_id;
struct nu_dma_chn_s *dma_chn = dma_chn_arr + chn_id - NU_PDMA_CH_Pos;
if (dma_chn->handler && (dma_chn->event & DMA_EVENT_TIMEOUT)) {
dma_chn->handler(dma_chn->id, DMA_EVENT_TIMEOUT);
}
}
reqto &= ~(1 << (chn_id + PDMA_INTSTS_REQTOF0_Pos));
reqto &= ~(1 << (chn_id - NU_PDMA_CH_Pos + PDMA_INTSTS_REQTOF0_Pos));
}
}
}