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board/tqc/tqm5200/cmd_stk52xx.c: fix GC 4.6 build warnings

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Fix:
cmd_stk52xx.c: In function 'spi_transmit':
cmd_stk52xx.c:85:6: warning: variable 'dummy' set but not used
[-Wunused-but-set-variable]
cmd_stk52xx.c: In function 'i2s_play_wave':
cmd_stk52xx.c:199:3: warning: dereferencing type-punned pointer will
break strict-aliasing rules [-Wstrict-aliasing]

Signed-off-by: Wolfgang Denk <wd@denx.de>
This commit is contained in:
Wolfgang Denk 2011-11-04 15:55:09 +00:00
parent 1c2931d4ec
commit 65766f3852
1 changed files with 12 additions and 11 deletions
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23
board/tqc/tqm5200/cmd_stk52xx.c
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@ -82,18 +82,17 @@ static void spi_init(void)
static int spi_transmit(unsigned char data) static int spi_transmit(unsigned char data)
{ {
int dummy;
struct mpc5xxx_spi *spi = (struct mpc5xxx_spi*)MPC5XXX_SPI; struct mpc5xxx_spi *spi = (struct mpc5xxx_spi*)MPC5XXX_SPI;
spi->dr = data; spi->dr = data;
/* wait for SPI transmission completed */ /* wait for SPI transmission completed */
while(!(spi->sr & 0x80)) while (!(spi->sr & 0x80)) {
{ if (spi->sr & 0x40) { /* if write collision occured */
if (spi->sr & 0x40) /* if write collision occured */ int dummy;
{
/* do dummy read to clear status register */ /* do dummy read to clear status register */
dummy = spi->dr; dummy = spi->dr;
printf ("SPI write collision\n"); printf("SPI write collision: dr=0x%x\n", dummy);
return -1; return -1;
} }
} }
@ -172,10 +171,8 @@ static void i2s_init(void)
psc->ccr = 0x1F03; /* 16 bit data width; 5.617MHz MCLK */ psc->ccr = 0x1F03; /* 16 bit data width; 5.617MHz MCLK */
psc->ctur = 0x0F; /* 16 bit frame width */ psc->ctur = 0x0F; /* 16 bit frame width */
for(i=0;i<128;i++) for (i = 0; i < 128; i++)
{
psc->psc_buffer_32 = 0; /* clear tx fifo */ psc->psc_buffer_32 = 0; /* clear tx fifo */
}
} }
static int i2s_play_wave(unsigned long addr, unsigned long len) static int i2s_play_wave(unsigned long addr, unsigned long len)
@ -183,7 +180,6 @@ static int i2s_play_wave(unsigned long addr, unsigned long len)
unsigned long i; unsigned long i;
unsigned char *wave_file = (uchar *)addr + 44; /* quick'n dirty: skip unsigned char *wave_file = (uchar *)addr + 44; /* quick'n dirty: skip
* wav header*/ * wav header*/
unsigned char swapped[4];
struct mpc5xxx_psc *psc = (struct mpc5xxx_psc*)MPC5XXX_PSC2; struct mpc5xxx_psc *psc = (struct mpc5xxx_psc*)MPC5XXX_PSC2;
/* /*
@ -192,11 +188,16 @@ static int i2s_play_wave(unsigned long addr, unsigned long len)
psc->command = (PSC_RX_ENABLE | PSC_TX_ENABLE); psc->command = (PSC_RX_ENABLE | PSC_TX_ENABLE);
for(i = 0;i < (len / 4); i++) { for(i = 0;i < (len / 4); i++) {
unsigned char swapped[4];
unsigned long *p = (unsigned long*)swapped;
swapped[3] = *wave_file++; swapped[3] = *wave_file++;
swapped[2] = *wave_file++; swapped[2] = *wave_file++;
swapped[1] = *wave_file++; swapped[1] = *wave_file++;
swapped[0] = *wave_file++; swapped[0] = *wave_file++;
psc->psc_buffer_32 = *((unsigned long*)swapped);
psc->psc_buffer_32 = *p;
while (psc->tfnum > 400) { while (psc->tfnum > 400) {
if(ctrlc()) if(ctrlc())
return 0; return 0;