Add pio_irq and pll code

(and a dummy dbgu.h)


git-svn-id: https://svn.openpcd.org:2342/trunk@322 6dc7ffe9-61d6-0310-9af1-9938baff3ed1

1 files changed, 142 insertions, 0 deletions

diff --git a/openpicc/application/pio_irq.c b/openpicc/application/pio_irq.c
new file mode 100644
index 0000000..572a4e4
--- /dev/null
+++ b/openpicc/application/pio_irq.c
@@ -0,0 +1,142 @@
+/* PIO IRQ Implementation for OpenPCD
+ * (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by 
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <errno.h>
+#include <sys/types.h>
+#include <lib_AT91SAM7.h>
+#include <string.h>
+#include "pio_irq.h"
+#include "dbgu.h"
+//#include <os/req_ctx.h>
+#include "openpicc.h"
+#include "board.h"
+#include "led.h"
+
+#include <FreeRTOS.h>
+#include <task.h>
+
+struct pioirq_state {
+	irq_handler_t *handlers[NR_PIO];
+	u_int32_t usbmask;
+	u_int32_t usb_throttled; /* atomic? */
+};
+
+static struct pioirq_state pirqs;
+
+/* low-level handler, used by Cstartup_app.S PIOA fast forcing and
+ * by regular interrupt handler below */
+void __ramfunc __pio_irq_demux(u_int32_t pio)
+{
+	u_int8_t send_usb = 0;
+	int i;
+
+	DEBUGPCRF("PIO_ISR_STATUS = 0x%08x", pio);
+
+	for (i = 0; i < NR_PIO; i++) {
+		if (pio & (1 << i) && pirqs.handlers[i])
+			pirqs.handlers[i](i);
+		if (pirqs.usbmask & (1 << i))
+			send_usb = 1;
+	}
+
+//	if (send_usb && !pirqs.usb_throttled) {
+//		struct req_ctx *irq_rctx;
+//		irq_rctx = req_ctx_find_get(0, RCTX_STATE_FREE,
+//					    RCTX_STATE_PIOIRQ_BUSY);
+//		if (!irq_rctx) {
+//			/* we cannot disable the interrupt, since we have
+//			 * non-usb listeners */
+//			pirqs.usb_throttled = 1;
+//		} else {
+//			struct openpcd_hdr *opcdh;
+//			u_int32_t *regmask;
+//			opcdh = (struct openpcd_hdr *) irq_rctx->data;
+//			regmask = (u_int32_t *) (irq_rctx->data + sizeof(*opcdh));
+//			opcdh->cmd = OPENPCD_CMD_PIO_IRQ;
+//			opcdh->reg = 0x00;
+//			opcdh->flags = 0x00;
+//			opcdh->val = 0x00;
+//
+//			irq_rctx->tot_len = sizeof(*opcdh) + sizeof(u_int32_t);
+//			req_ctx_set_state(irq_rctx, RCTX_STATE_UDP_EP3_PENDING);
+//		}
+//	}
+
+	AT91F_AIC_AcknowledgeIt();
+	//AT91F_AIC_ClearIt(AT91C_ID_PIOA);
+}
+
+/* regular interrupt handler, in case fast forcing for PIOA disabled */
+static void pio_irq_demux(void)
+{
+	portSAVE_CONTEXT();
+	u_int32_t pio = AT91F_PIO_GetInterruptStatus(AT91C_BASE_PIOA);
+	__pio_irq_demux(pio);
+	portRESTORE_CONTEXT();	
+}
+
+void pio_irq_enable(u_int32_t pio)
+{
+	AT91F_PIO_InterruptEnable(AT91C_BASE_PIOA, pio);
+}
+
+void pio_irq_disable(u_int32_t pio)
+{
+	AT91F_PIO_InterruptDisable(AT91C_BASE_PIOA, pio);
+}
+
+int pio_irq_register(u_int32_t pio, irq_handler_t *handler)
+{
+	u_int8_t num = ffs(pio);
+
+	if (num == 0)
+		return -EINVAL;
+	num--;
+
+	if (pirqs.handlers[num])
+		return -EBUSY;
+
+	pio_irq_disable(pio);
+	AT91F_PIO_CfgInput(AT91C_BASE_PIOA, pio);
+	pirqs.handlers[num] = handler;
+	DEBUGPCRF("registering handler %p for PIOA %u", handler, num);
+
+	return 0;
+}
+
+void pio_irq_unregister(u_int32_t pio)
+{
+	u_int8_t num = ffs(pio);
+
+	if (num == 0)
+		return;
+	num--;
+
+	pio_irq_disable(pio);
+	pirqs.handlers[num] = NULL;
+}
+
+void pio_irq_init(void)
+{
+	AT91F_PIOA_CfgPMC();
+	AT91F_AIC_ConfigureIt(AT91C_ID_PIOA,
+			      AT91C_AIC_PRIOR_LOWEST,
+			      AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, &pio_irq_demux);
+	AT91F_AIC_EnableIt(AT91C_ID_PIOA);
+}