[core] Mutex->spinlock for FATFS and remove IRQ disabling from SD SPI.

Author: DC-SWAT

src/drivers/spi.c

@@ -369,7 +369,6 @@ void spi_send_byte(register uint8 b) {
 
 	register uint16 _pwork;
 	_pwork = pwork;
-	int old = irq_disable();
 
 	TX_BIT();
 	CTS_ON_FAST();		/* SPI clock ON */
@@ -408,7 +407,6 @@ void spi_send_byte(register uint8 b) {
 	dbglog(DBG_DEBUG, "spi_send_byte: %02x\n", b);
 	//dump_regs();
 #endif
-	irq_restore(old);
 }
 
 
@@ -466,7 +464,6 @@ uint8 spi_rec_byte() {
 
 	_pwork = pwork;
 	b = 0xff;
-	int old = irq_disable();
 
 	TX_BIT();
 	CTS_ON_FAST();			/* SPI clock ON */
@@ -499,7 +496,6 @@ uint8 spi_rec_byte() {
 	//dump_regs();
 #endif
 
-	irq_restore(old);
 	return b;
 }
 
@@ -570,7 +566,6 @@ uint8 spi_sr_byte(register uint8 b) {
 	dbglog(DBG_DEBUG, "spi_sr_byte: send: %02x\n", b);
 	//dump_regs();
 #endif
-	int old = irq_disable();
 
 	TX_BIT();
 	CTS_ON_FAST();			/* SPI clock ON */
@@ -610,7 +605,6 @@ uint8 spi_sr_byte(register uint8 b) {
 	//dump_regs();
 #endif
 
-	irq_restore(old);
 	return b;
 }
 
@@ -628,8 +622,6 @@ uint8 spi_slow_sr_byte(register uint8 b) {
 	dbglog(DBG_DEBUG, "spi_slow_sr_byte: send: %02x\n", b);
 #endif
 
-	int old = irq_disable();
-
 	for (cnt = 0; cnt < 8; cnt++) {
 
 		pwork = b & MSB ? (pwork | SCSPTR2_SPB2DT) : (pwork & ~SCSPTR2_SPB2DT);
@@ -645,8 +637,6 @@ uint8 spi_slow_sr_byte(register uint8 b) {
 		reg_write_16(SCSPTR2, pwork);
 	}
 
-	irq_restore(old);
-
 #ifdef SPI_DEBUG_RW
 	dbglog(DBG_DEBUG, "spi_slow_sr_byte: receive: %02x\n", b);
 	//dump_regs();
@@ -675,8 +665,6 @@ void spi_send_data(const uint8* data, uint16 len) {
 	register uint16 _pwork;
 	_pwork = pwork;
 
-	int old = irq_disable();
-
 	/* Used send/receive byte because only receive works unstable */
 	for(; len > 0; len -= 4) {
 
@@ -822,7 +810,6 @@ void spi_send_data(const uint8* data, uint16 len) {
 
 		data += 4;
 	}
-	irq_restore(old);
 }
 
 
@@ -842,7 +829,6 @@ void spi_rec_data(uint8* buffer, uint16 len) {
 	uint8 b = 0xff;
 	uint16 cts_off = (pwork & ~SCSPTR2_CTSDT) | SCSPTR2_SPB2DT;
 	uint16 cts_on = (pwork | SCSPTR2_CTSDT | SCSPTR2_SPB2DT);
-	int old = irq_disable();
 
 	reg_write_16(SCSPTR2, cts_off);
 
@@ -956,5 +942,4 @@ void spi_rec_data(uint8* buffer, uint16 len) {
 		buffer[3] = b;
 		buffer += 4;
 	}
-	irq_restore(old);
 }