summaryrefslogtreecommitdiff
path: root/cpu/mcf5227x/cpu_init.c
diff options
context:
space:
mode:
Diffstat (limited to 'cpu/mcf5227x/cpu_init.c')
-rw-r--r--cpu/mcf5227x/cpu_init.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/cpu/mcf5227x/cpu_init.c b/cpu/mcf5227x/cpu_init.c
index 8945ef3..d8bcf37 100644
--- a/cpu/mcf5227x/cpu_init.c
+++ b/cpu/mcf5227x/cpu_init.c
@@ -152,3 +152,56 @@ void uart_port_conf(void)
break;
}
}
+
+#ifdef CONFIG_CF_DSPI
+void cfspi_port_conf(void)
+{
+ volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO;
+
+ gpio->par_dspi =
+ GPIO_PAR_DSPI_SIN_SIN | GPIO_PAR_DSPI_SOUT_SOUT |
+ GPIO_PAR_DSPI_SCK_SCK;
+}
+
+int cfspi_claim_bus(uint bus, uint cs)
+{
+ volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI;
+ volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO;
+
+ if ((dspi->sr & DSPI_SR_TXRXS) != DSPI_SR_TXRXS)
+ return -1;
+
+ /* Clear FIFO and resume transfer */
+ dspi->mcr &= ~(DSPI_MCR_CTXF | DSPI_MCR_CRXF);
+
+ switch (cs) {
+ case 0:
+ gpio->par_dspi &= ~GPIO_PAR_DSPI_PCS0_MASK;
+ gpio->par_dspi |= GPIO_PAR_DSPI_PCS0_PCS0;
+ break;
+ case 2:
+ gpio->par_timer &= GPIO_PAR_TIMER_T2IN_MASK;
+ gpio->par_timer |= GPIO_PAR_TIMER_T2IN_DSPIPCS2;
+ break;
+ }
+
+ return 0;
+}
+
+void cfspi_release_bus(uint bus, uint cs)
+{
+ volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI;
+ volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO;
+
+ dspi->mcr &= ~(DSPI_MCR_CTXF | DSPI_MCR_CRXF); /* Clear FIFO */
+
+ switch (cs) {
+ case 0:
+ gpio->par_dspi &= ~GPIO_PAR_DSPI_PCS0_PCS0;
+ break;
+ case 2:
+ gpio->par_timer &= GPIO_PAR_TIMER_T2IN_MASK;
+ break;
+ }
+}
+#endif