--- /dev/null
+/*
+ * 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 __pdata uint16_t ao_usb_in_bytes_last;
+static __xdata uint16_t ao_usb_out_bytes;
+static __pdata uint8_t ao_usb_iif;
+static __pdata 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_stdin_ready);
+
+ if (USBCIF & USBCIF_RSTIF)
+ ao_usb_set_interrupts();
+#if HAS_BTM
+#if BT_LINK_ON_P2
+ ao_btm_isr();
+#endif
+#endif
+}
+
+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;
+
+__pdata uint8_t ao_usb_ep0_state;
+uint8_t * __pdata ao_usb_ep0_in_data;
+__pdata uint8_t ao_usb_ep0_in_len;
+__pdata uint8_t ao_usb_ep0_in_buf[2];
+__pdata uint8_t ao_usb_ep0_out_len;
+__xdata uint8_t *__pdata ao_usb_ep0_out_data;
+__pdata uint8_t ao_usb_configuration;
+
+/* Send an IN data packet */
+static void
+ao_usb_ep0_flush(void)
+{
+ __pdata uint8_t this_len;
+ __pdata uint8_t cs0;
+
+ /* If the IN packet hasn't been picked up, just return */
+ USBINDEX = 0;
+ cs0 = USBCS0;
+ if (cs0 & USBCS0_INPKT_RDY)
+ return;
+
+ 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)
+{
+ __code uint8_t *__pdata descriptor;
+ __pdata uint8_t type = value >> 8;
+ __pdata 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)
+{
+ __pdata 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)
+{
+ __pdata 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;
+ }
+ }
+ }
+}
+
+/* Wait for a free IN buffer */
+static void
+ao_usb_in_wait(void)
+{
+ for (;;) {
+ USBINDEX = AO_USB_IN_EP;
+ if ((USBCSIL & USBCSIL_INPKT_RDY) == 0)
+ break;
+ ao_sleep(&ao_usb_in_bytes);
+ }
+}
+
+/* Send the current IN packet */
+static void
+ao_usb_in_send(void)
+{
+ USBINDEX = AO_USB_IN_EP;
+ USBCSIL |= USBCSIL_INPKT_RDY;
+ ao_usb_in_bytes_last = ao_usb_in_bytes;
+ ao_usb_in_bytes = 0;
+}
+
+void
+ao_usb_flush(void) __critical
+{
+ if (!ao_usb_running)
+ return;
+
+ /* If there are pending bytes, or if the last packet was full,
+ * send another IN packet
+ */
+ if (ao_usb_in_bytes || (ao_usb_in_bytes_last == AO_USB_IN_SIZE)) {
+ ao_usb_in_wait();
+ ao_usb_in_send();
+ }
+}
+
+void
+ao_usb_putchar(char c) __critical __reentrant
+{
+ if (!ao_usb_running)
+ return;
+
+ ao_usb_in_wait();
+
+ /* Queue a byte, sending the packet when full */
+ USBFIFO[AO_USB_IN_EP << 1] = c;
+ if (++ao_usb_in_bytes == AO_USB_IN_SIZE)
+ ao_usb_in_send();
+}
+
+char
+ao_usb_pollchar(void) __critical
+{
+ char c;
+ if (ao_usb_out_bytes == 0) {
+ USBINDEX = AO_USB_OUT_EP;
+ if ((USBCSOL & USBCSOL_OUTPKT_RDY) == 0)
+ return AO_READ_AGAIN;
+ ao_usb_out_bytes = (USBCNTH << 8) | USBCNTL;
+ if (ao_usb_out_bytes == 0) {
+ USBINDEX = AO_USB_OUT_EP;
+ USBCSOL &= ~USBCSOL_OUTPKT_RDY;
+ return AO_READ_AGAIN;
+ }
+ }
+ --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;
+}
+
+char
+ao_usb_getchar(void) __critical
+{
+ char c;
+
+ while ((c = ao_usb_pollchar()) == AO_READ_AGAIN)
+ ao_sleep(&ao_stdin_ready);
+ 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");
+ ao_add_stdio(ao_usb_pollchar, ao_usb_putchar, ao_usb_flush);
+}
projects / fw / altos / blobdiff