Use autotools, move altos to src subdir

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 418 insertions, 0 deletions

diff --git a/src/ao_usb.c b/src/ao_usb.c
new file mode 100644
index 00000000..99f0715b
--- /dev/null
+++ b/src/ao_usb.c
@@ -0,0 +1,418 @@
+/*
+ * Copyright © 2009 Keith Packard <keithp@keithp.com>
+ *
+ * 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; version 2 of the License.
+ *
+ * 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 "ao.h"
+#include "ao_usb.h"
+
+struct ao_task __xdata ao_usb_task;
+
+static __xdata uint16_t	ao_usb_in_bytes;
+static __xdata uint16_t	ao_usb_out_bytes;
+static __xdata uint8_t	ao_usb_iif;
+static __xdata uint8_t	ao_usb_running;
+
+static void
+ao_usb_set_interrupts(void)
+{
+	/* IN interrupts on the control an IN endpoints */
+	USBIIE = (1 << AO_USB_CONTROL_EP) | (1 << AO_USB_IN_EP);
+
+	/* OUT interrupts on the OUT endpoint */
+	USBOIE = (1 << AO_USB_OUT_EP);
+
+	/* Only care about reset */
+	USBCIE = USBCIE_RSTIE;
+}
+
+/* This interrupt is shared with port 2,
+ * so when we hook that up, fix this
+ */
+void
+ao_usb_isr(void) interrupt 6
+{
+	USBIF = 0;
+	ao_usb_iif |= USBIIF;
+	if (ao_usb_iif & 1)
+		ao_wakeup(&ao_usb_task);
+	if (ao_usb_iif & (1 << AO_USB_IN_EP))
+		ao_wakeup(&ao_usb_in_bytes);
+
+	if (USBOIF & (1 << AO_USB_OUT_EP))
+		ao_wakeup(&ao_usb_out_bytes);
+
+	if (USBCIF & USBCIF_RSTIF)
+		ao_usb_set_interrupts();
+}
+
+struct ao_usb_setup {
+	uint8_t		dir_type_recip;
+	uint8_t		request;
+	uint16_t	value;
+	uint16_t	index;
+	uint16_t	length;
+} __xdata ao_usb_setup;
+
+__xdata uint8_t ao_usb_ep0_state;
+uint8_t * __xdata ao_usb_ep0_in_data;
+__xdata uint8_t ao_usb_ep0_in_len;
+__xdata uint8_t	ao_usb_ep0_in_buf[2];
+__xdata uint8_t ao_usb_ep0_out_len;
+__xdata uint8_t *__data ao_usb_ep0_out_data;
+__xdata uint8_t ao_usb_configuration;
+
+/* Send an IN data packet */
+static void
+ao_usb_ep0_flush(void)
+{
+	__xdata uint8_t this_len;
+	__xdata uint8_t	cs0;
+
+	USBINDEX = 0;
+	cs0 = USBCS0;
+	if (cs0 & USBCS0_INPKT_RDY)
+		ao_panic(0);
+
+	this_len = ao_usb_ep0_in_len;
+	if (this_len > AO_USB_CONTROL_SIZE)
+		this_len = AO_USB_CONTROL_SIZE;
+	cs0 = USBCS0_INPKT_RDY;
+	if (this_len != AO_USB_CONTROL_SIZE) {
+		cs0 = USBCS0_INPKT_RDY | USBCS0_DATA_END;
+		ao_usb_ep0_state = AO_USB_EP0_IDLE;
+	}
+	ao_usb_ep0_in_len -= this_len;
+	while (this_len--)
+		USBFIFO[0] = *ao_usb_ep0_in_data++;
+	USBINDEX = 0;
+	USBCS0 = cs0;
+}
+
+__xdata static struct ao_usb_line_coding ao_usb_line_coding = {115200, 0, 0, 8};
+
+/* Walk through the list of descriptors and find a match
+ */
+static void
+ao_usb_get_descriptor(uint16_t value)
+{
+	const uint8_t		*__xdata descriptor;
+	__xdata uint8_t		type = value >> 8;
+	__xdata uint8_t		index = value;
+
+	descriptor = ao_usb_descriptors;
+	while (descriptor[0] != 0) {
+		if (descriptor[1] == type && index-- == 0) {
+			if (type == AO_USB_DESC_CONFIGURATION)
+				ao_usb_ep0_in_len = descriptor[2];
+			else
+				ao_usb_ep0_in_len = descriptor[0];
+			ao_usb_ep0_in_data = descriptor;
+			break;
+		}
+		descriptor += descriptor[0];
+	}
+}
+
+/* Read data from the ep0 OUT fifo
+ */
+static void
+ao_usb_ep0_fill(void)
+{
+	__xdata uint8_t	len;
+
+	USBINDEX = 0;
+	len = USBCNT0;
+	if (len > ao_usb_ep0_out_len)
+		len = ao_usb_ep0_out_len;
+	ao_usb_ep0_out_len -= len;
+	while (len--)
+		*ao_usb_ep0_out_data++ = USBFIFO[0];
+}
+
+void
+ao_usb_ep0_queue_byte(uint8_t a)
+{
+	ao_usb_ep0_in_buf[ao_usb_ep0_in_len++] = a;
+}
+
+void
+ao_usb_set_address(uint8_t address)
+{
+	ao_usb_running = 1;
+	USBADDR = address | 0x80;
+	while (USBADDR & 0x80)
+		;
+}
+
+static void
+ao_usb_set_configuration(void)
+{
+	/* Set the IN max packet size, double buffered */
+	USBINDEX = AO_USB_IN_EP;
+	USBMAXI = AO_USB_IN_SIZE >> 3;
+	USBCSIH |= USBCSIH_IN_DBL_BUF;
+
+	/* Set the OUT max packet size, double buffered */
+	USBINDEX = AO_USB_OUT_EP;
+	USBMAXO = AO_USB_OUT_SIZE >> 3;
+	USBCSOH = USBCSOH_OUT_DBL_BUF;
+}
+
+static void
+ao_usb_ep0_setup(void)
+{
+	/* Pull the setup packet out of the fifo */
+	ao_usb_ep0_out_data = (__xdata uint8_t *) &ao_usb_setup;
+	ao_usb_ep0_out_len = 8;
+	ao_usb_ep0_fill();
+	if (ao_usb_ep0_out_len != 0)
+		return;
+
+	/* Figure out how to ACK the setup packet */
+	if (ao_usb_setup.dir_type_recip & AO_USB_DIR_IN) {
+		if (ao_usb_setup.length)
+			ao_usb_ep0_state = AO_USB_EP0_DATA_IN;
+		else
+			ao_usb_ep0_state = AO_USB_EP0_IDLE;
+	} else {
+		if (ao_usb_setup.length)
+			ao_usb_ep0_state = AO_USB_EP0_DATA_OUT;
+		else
+			ao_usb_ep0_state = AO_USB_EP0_IDLE;
+	}
+	USBINDEX = 0;
+	if (ao_usb_ep0_state == AO_USB_EP0_IDLE)
+		USBCS0 = USBCS0_CLR_OUTPKT_RDY | USBCS0_DATA_END;
+	else
+		USBCS0 = USBCS0_CLR_OUTPKT_RDY;
+
+	ao_usb_ep0_in_data = ao_usb_ep0_in_buf;
+	ao_usb_ep0_in_len = 0;
+	switch(ao_usb_setup.dir_type_recip & AO_USB_SETUP_TYPE_MASK) {
+	case AO_USB_TYPE_STANDARD:
+		switch(ao_usb_setup.dir_type_recip & AO_USB_SETUP_RECIP_MASK) {
+		case AO_USB_RECIP_DEVICE:
+			switch(ao_usb_setup.request) {
+			case AO_USB_REQ_GET_STATUS:
+				ao_usb_ep0_queue_byte(0);
+				ao_usb_ep0_queue_byte(0);
+				break;
+			case AO_USB_REQ_SET_ADDRESS:
+				ao_usb_set_address(ao_usb_setup.value);
+				break;
+			case AO_USB_REQ_GET_DESCRIPTOR:
+				ao_usb_get_descriptor(ao_usb_setup.value);
+				break;
+			case AO_USB_REQ_GET_CONFIGURATION:
+				ao_usb_ep0_queue_byte(ao_usb_configuration);
+				break;
+			case AO_USB_REQ_SET_CONFIGURATION:
+				ao_usb_configuration = ao_usb_setup.value;
+				ao_usb_set_configuration();
+				break;
+			}
+			break;
+		case AO_USB_RECIP_INTERFACE:
+			#pragma disable_warning 110
+			switch(ao_usb_setup.request) {
+			case AO_USB_REQ_GET_STATUS:
+				ao_usb_ep0_queue_byte(0);
+				ao_usb_ep0_queue_byte(0);
+				break;
+			case AO_USB_REQ_GET_INTERFACE:
+				ao_usb_ep0_queue_byte(0);
+				break;
+			case AO_USB_REQ_SET_INTERFACE:
+				break;
+			}
+			break;
+		case AO_USB_RECIP_ENDPOINT:
+			switch(ao_usb_setup.request) {
+			case AO_USB_REQ_GET_STATUS:
+				ao_usb_ep0_queue_byte(0);
+				ao_usb_ep0_queue_byte(0);
+				break;
+			}
+			break;
+		}
+		break;
+	case AO_USB_TYPE_CLASS:
+		switch (ao_usb_setup.request) {
+		case SET_LINE_CODING:
+			ao_usb_ep0_out_len = 7;
+			ao_usb_ep0_out_data = (__xdata uint8_t *) &ao_usb_line_coding;
+			break;
+		case GET_LINE_CODING:
+			ao_usb_ep0_in_len = 7;
+			ao_usb_ep0_in_data = (uint8_t *) &ao_usb_line_coding;
+			break;
+		case SET_CONTROL_LINE_STATE:
+			break;
+		}
+		break;
+	}
+	if (ao_usb_ep0_state != AO_USB_EP0_DATA_OUT) {
+		if (ao_usb_setup.length < ao_usb_ep0_in_len)
+			ao_usb_ep0_in_len = ao_usb_setup.length;
+		ao_usb_ep0_flush();
+	}
+}
+
+/* End point 0 receives all of the control messages. */
+static void
+ao_usb_ep0(void)
+{
+	__xdata uint8_t	cs0;
+
+	ao_usb_ep0_state = AO_USB_EP0_IDLE;
+	for (;;) {
+		__critical for (;;) {
+			if (ao_usb_iif & 1) {
+				ao_usb_iif &= ~1;
+				break;
+			}
+			ao_sleep(&ao_usb_task);
+		}
+		USBINDEX = 0;
+		cs0 = USBCS0;
+		if (cs0 & USBCS0_SETUP_END) {
+			ao_usb_ep0_state = AO_USB_EP0_IDLE;
+			USBCS0 = USBCS0_CLR_SETUP_END;
+		}
+		if (cs0 & USBCS0_SENT_STALL) {
+			ao_usb_ep0_state = AO_USB_EP0_IDLE;
+			USBCS0 &= ~USBCS0_SENT_STALL;
+		}
+		if (ao_usb_ep0_state == AO_USB_EP0_DATA_IN &&
+		    (cs0 & USBCS0_INPKT_RDY) == 0)
+		{
+			ao_usb_ep0_flush();
+		}
+		if (cs0 & USBCS0_OUTPKT_RDY) {
+			switch (ao_usb_ep0_state) {
+			case AO_USB_EP0_IDLE:
+				ao_usb_ep0_setup();
+				break;
+			case AO_USB_EP0_DATA_OUT:
+				ao_usb_ep0_fill();
+				if (ao_usb_ep0_out_len == 0)
+					ao_usb_ep0_state = AO_USB_EP0_IDLE;
+				USBINDEX = 0;
+				if (ao_usb_ep0_state == AO_USB_EP0_IDLE)
+					USBCS0 = USBCS0_CLR_OUTPKT_RDY | USBCS0_DATA_END;
+				else
+					USBCS0 = USBCS0_CLR_OUTPKT_RDY;
+				break;
+			}
+		}
+	}
+}
+
+void
+ao_usb_flush(void) __critical
+{
+	if (ao_usb_in_bytes) {
+		USBINDEX = AO_USB_IN_EP;
+		USBCSIL |= USBCSIL_INPKT_RDY;
+		ao_usb_in_bytes = 0;
+	}
+}
+
+void
+ao_usb_putchar(char c) __critical
+{
+	if (!ao_usb_running)
+		return;
+	for (;;) {
+		USBINDEX = AO_USB_IN_EP;
+		if ((USBCSIL & USBCSIL_INPKT_RDY) == 0)
+			break;
+		ao_sleep(&ao_usb_in_bytes);
+	}
+	USBFIFO[AO_USB_IN_EP << 1] = c;
+	if (++ao_usb_in_bytes == AO_USB_IN_SIZE) {
+		USBINDEX = AO_USB_IN_EP;
+		USBCSIL |= USBCSIL_INPKT_RDY;
+		ao_usb_in_bytes = 0;
+	}
+}
+
+char
+ao_usb_getchar(void) __critical
+{
+	__xdata char	c;
+	while (ao_usb_out_bytes == 0) {
+		for (;;) {
+			USBINDEX = AO_USB_OUT_EP;
+			if ((USBCSOL & USBCSOL_OUTPKT_RDY) != 0)
+				break;
+			ao_sleep(&ao_usb_out_bytes);
+		}
+		ao_usb_out_bytes = (USBCNTH << 8) | USBCNTL;
+	}
+	--ao_usb_out_bytes;
+	c = USBFIFO[AO_USB_OUT_EP << 1];
+	if (ao_usb_out_bytes == 0) {
+		USBINDEX = AO_USB_OUT_EP;
+		USBCSOL &= ~USBCSOL_OUTPKT_RDY;
+	}
+	return c;
+}
+
+void
+ao_usb_enable(void)
+{
+	/* Turn on the USB controller */
+	SLEEP |= SLEEP_USB_EN;
+
+	ao_usb_set_configuration();
+
+	ao_usb_set_interrupts();
+
+	/* enable USB interrupts */
+	IEN2 |= IEN2_USBIE;
+
+	/* Clear any pending interrupts */
+	USBCIF = 0;
+	USBOIF = 0;
+	USBIIF = 0;
+}
+
+void
+ao_usb_disable(void)
+{
+	/* Disable USB interrupts */
+	USBIIE = 0;
+	USBOIE = 0;
+	USBCIE = 0;
+	IEN2 &= ~IEN2_USBIE;
+
+	/* Clear any pending interrupts */
+	USBCIF = 0;
+	USBOIF = 0;
+	USBIIF = 0;
+
+	/* Turn off the USB controller */
+	SLEEP &= ~SLEEP_USB_EN;
+}
+
+void
+ao_usb_init(void)
+{
+	ao_usb_enable();
+
+	ao_add_task(&ao_usb_task, ao_usb_ep0, "usb");
+}