From d256545b2fd62d78910efcc6273c3b70abd3aa13 Mon Sep 17 00:00:00 2001
From: laforge <laforge@6dc7ffe9-61d6-0310-9af1-9938baff3ed1>
Date: Tue, 12 Sep 2006 17:35:30 +0000
Subject: move to new directory

git-svn-id: https://svn.openpcd.org:2342/trunk@191 6dc7ffe9-61d6-0310-9af1-9938baff3ed1
---
 firmware/src/os/pio_irq.c | 122 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 firmware/src/os/pio_irq.c

(limited to 'firmware/src/os/pio_irq.c')

diff --git a/firmware/src/os/pio_irq.c b/firmware/src/os/pio_irq.c
new file mode 100644
index 0000000..8dae806
--- /dev/null
+++ b/firmware/src/os/pio_irq.c
@@ -0,0 +1,122 @@
+#include <errno.h>
+#include <sys/types.h>
+#include <lib_AT91SAM7.h>
+#include <os/pio_irq.h>
+#include <os/dbgu.h>
+#include <os/req_ctx.h>
+#include <openpcd.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;
+
+static void pio_irq_demux(void)
+{
+	u_int32_t pio = AT91F_PIO_GetInterruptStatus(AT91C_BASE_PIOA);
+	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(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->tx.data[0];
+			regmask = (u_int32_t *) (&irq_rctx->tx.data[0] + sizeof(*opcdh));
+			opcdh->cmd = OPENPCD_CMD_PIO_IRQ;
+			opcdh->reg = 0x00;
+			opcdh->flags = 0x00;
+			opcdh->val = 0x00;
+
+			irq_rctx->tx.tot_len = sizeof(*opcdh) + sizeof(u_int32_t);
+			req_ctx_set_state(irq_rctx, RCTX_STATE_UDP_EP3_PENDING);
+		}
+	}
+
+	AT91F_AIC_ClearIt(AT91C_BASE_AIC, AT91C_ID_PIOA);
+}
+
+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;
+
+	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;
+}
+
+static int pio_irq_usb_in(struct req_ctx *rctx)
+{
+	struct openpcd_hdr *poh = (struct openpcd_hdr *) &rctx->rx.data[0];
+	struct openpcd_hdr *pih = (struct openpcd_hdr *) &rctx->tx.data[0];
+
+	switch (poh->cmd) {
+	case OPENPCD_CMD_PIO_IRQ:
+		pirqs.usbmask = poh->val;
+		break;
+	default:
+		DEBUGP("UNKNOWN ");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+void pio_irq_init(void)
+{
+	AT91F_PIOA_CfgPMC();
+	AT91F_AIC_ConfigureIt(AT91C_BASE_AIC, AT91C_ID_PIOA,
+			      AT91C_AIC_PRIOR_LOWEST,
+			      AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, &pio_irq_demux);
+	AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_PIOA);
+}
-- 
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