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authorhenryk <henryk@6dc7ffe9-61d6-0310-9af1-9938baff3ed1>2007-11-11 19:24:37 +0000
committerhenryk <henryk@6dc7ffe9-61d6-0310-9af1-9938baff3ed1>2007-11-11 19:24:37 +0000
commit1dfa375abb95c59830c38697c53fa9a6794a9fb9 (patch)
treeffa43c6bcfe4662c6e73baf1668b85b097b9028f /openpicc/application/tc_cdiv_sync.c
parent9d397dfbbea03968384b9a1b0ae121b6ba256806 (diff)
Add code modules for tc_fdt, tc_cdiv_sync, tc_cdiv, ssc_picc
Almost all of these have not been checked yet, I just copied them over and hot-fixed compile time errors F.e. all ssc usb code has been removed git-svn-id: https://svn.openpcd.org:2342/trunk@323 6dc7ffe9-61d6-0310-9af1-9938baff3ed1
Diffstat (limited to 'openpicc/application/tc_cdiv_sync.c')
-rw-r--r--openpicc/application/tc_cdiv_sync.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/openpicc/application/tc_cdiv_sync.c b/openpicc/application/tc_cdiv_sync.c
new file mode 100644
index 0000000..486e93b
--- /dev/null
+++ b/openpicc/application/tc_cdiv_sync.c
@@ -0,0 +1,110 @@
+/* Synchronize TC_CDIV divided sample clock with the SOF of the packet */
+
+#include <lib_AT91SAM7.h>
+#include <AT91SAM7.h>
+#include "dbgu.h"
+#include "pio_irq.h"
+#include "openpicc.h"
+
+#define USE_IRQ
+
+static u_int8_t enabled;
+
+#if 0
+static void pio_data_change(u_int32_t pio)
+{
+ (void)pio;
+ DEBUGP("PIO_FRAME_IRQ: ");
+ /* we get one interrupt for each change. If now, after the
+ * change the level is high, then it must have been a rising
+ * edge */
+ if (*AT91C_PIOA_PDSR & OPENPICC_PIO_FRAME) {
+ *AT91C_TC0_CCR = AT91C_TC_SWTRG;
+ DEBUGPCR("CDIV_SYNC_FLIP SWTRG CV=0x%08x",
+ *AT91C_TC0_CV);
+ } else
+ DEBUGPCR("");
+}
+
+#else
+
+static void __ramfunc cdsync_cb(void)
+{
+ DEBUGP("PIO_IRQ: ");
+ if (*AT91C_PIOA_ISR & OPENPICC_PIO_FRAME) {
+ DEBUGP("PIO_FRAME_IRQ: ");
+ /* we get one interrupt for each change. If now, after the
+ * change the level is high, then it must have been a rising
+ * edge */
+ if (*AT91C_PIOA_PDSR & OPENPICC_PIO_FRAME) {
+ *AT91C_TC0_CCR = AT91C_TC_SWTRG;
+ DEBUGPCR("CDIV_SYNC_FLIP SWTRG CV=0x%08x",
+ *AT91C_TC0_CV);
+ } else
+ DEBUGPCR("");
+ } else
+ DEBUGPCR("");
+}
+#endif
+
+void tc_cdiv_sync_reset(void)
+{
+ if (enabled) {
+ u_int32_t tmp = *AT91C_PIOA_ISR;
+ (void)tmp;
+ volatile int i;
+ DEBUGPCRF("CDIV_SYNC_FLOP");
+
+ /* reset the hardware flipflop */
+ AT91F_PIO_ClearOutput(AT91C_BASE_PIOA,
+ OPENPICC_PIO_SSC_DATA_CONTROL);
+ for (i = 0; i < 0xff; i++) ;
+ AT91F_PIO_SetOutput(AT91C_BASE_PIOA,
+ OPENPICC_PIO_SSC_DATA_CONTROL);
+ }
+}
+
+void tc_cdiv_sync_disable(void)
+{
+ enabled = 0;
+ *AT91C_PIOA_IDR = OPENPICC_PIO_FRAME;
+}
+
+void tc_cdiv_sync_enable(void)
+{
+ enabled = 1;
+
+ DEBUGPCRF("CDIV_SYNC_ENABLE ");
+ tc_cdiv_sync_reset();
+ *AT91C_PIOA_IER = OPENPICC_PIO_FRAME;
+}
+
+extern void (*fiq_handler)(void);
+void tc_cdiv_sync_init(void)
+{
+ DEBUGPCRF("initializing");
+
+ enabled = 0;
+
+ AT91F_PIOA_CfgPMC();
+
+#ifdef USE_IRQ
+ /* Configure IRQ */
+ AT91F_AIC_ConfigureIt(AT91C_ID_PIOA,
+ AT91C_AIC_PRIOR_HIGHEST,
+ AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, (THandler)&cdsync_cb);
+#else
+ /* Configure FIQ */
+ AT91F_AIC_ConfigureIt(AT91C_ID_FIQ,
+ //0, AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, &cdsync_cb);
+ 0, AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, (THandler)&fiq_handler);
+ /* enable fast forcing for PIOA interrupt */
+ *AT91C_AIC_FFER = (1 << AT91C_ID_PIOA);
+
+ /* register pio irq handler */
+ pio_irq_register(OPENPICC_PIO_FRAME, &pio_data_change);
+#endif
+ AT91F_AIC_EnableIt(AT91C_ID_PIOA);
+
+ tc_cdiv_sync_disable();
+}
personal git repositories of Harald Welte. Your mileage may vary