--- /dev/null
+/*
+ * Copyright © 2011 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"
+
+#define USB_DEBUG 0
+
+#if USB_DEBUG
+#define debug(format, args...) printf(format, ## args)
+#else
+#define debug(format, args...)
+#endif
+
+struct ao_task __xdata ao_usb_task;
+
+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;
+
+static __xdata uint8_t ao_usb_ep0_state;
+static const uint8_t * __xdata ao_usb_ep0_in_data;
+static __xdata uint8_t ao_usb_ep0_in_len;
+static __xdata uint8_t ao_usb_ep0_in_pending;
+static __xdata uint8_t ao_usb_addr_pending;
+static __xdata uint8_t ao_usb_ep0_in_buf[2];
+static __xdata uint8_t ao_usb_ep0_out_len;
+static __xdata uint8_t *__xdata ao_usb_ep0_out_data;
+
+static __xdata uint8_t ao_usb_in_flushed;
+static __xdata uint8_t ao_usb_running;
+static __xdata uint8_t ao_usb_configuration;
+static __xdata uint8_t ueienx_0;
+
+void
+ao_usb_set_address(uint8_t address)
+{
+ UDADDR = (0 << ADDEN) | address;
+ ao_usb_addr_pending = 1;
+}
+
+#define EP_SIZE(s) ((s) == 64 ? 0x30 : \
+ ((s) == 32 ? 0x20 : \
+ ((s) == 16 ? 0x10 : \
+ 0x00)))
+
+static void
+ao_usb_dump_ep(uint8_t ep)
+{
+ UENUM = ep;
+ debug ("EP %d: UECONX %02x UECFG0X %02x UECFG1X %02x UEIENX %02x UESTA0X %02x UESTA1X %02X\n",
+ ep, UECONX, UECFG0X, UECFG1X, UEIENX, UESTA0X, UESTA1X);
+}
+
+static void
+ao_usb_set_ep0(void)
+{
+ debug ("set_ep0\n");
+ /* Set the CONTROL max packet size, single buffered */
+ UENUM = 0;
+ UECONX = (1 << EPEN); /* Enable */
+
+ UECFG0X = ((0 << EPTYPE0) | /* Control */
+ (0 << EPDIR)); /* Out (ish) */
+
+ UECFG1X = (EP_SIZE(AO_USB_CONTROL_SIZE) | /* Size */
+ (0 << EPBK0) | /* Single bank */
+ (1 << ALLOC));
+
+ ueienx_0 = ((1 << RXSTPE) | /* Enable SETUP interrupt */
+ (1 << RXOUTE)); /* Enable OUT interrupt */
+
+// ao_usb_dump_ep(0);
+ ao_usb_addr_pending = 0;
+}
+
+static void
+ao_usb_set_configuration(void)
+{
+ /* Set the IN max packet size, double buffered */
+ UENUM = AO_USB_IN_EP;
+ UECONX = (1 << EPEN); /* Enable */
+
+ UECFG0X = ((2 << EPTYPE0) | /* Bulk */
+ (1 << EPDIR)); /* In */
+
+ UECFG1X = (EP_SIZE(AO_USB_IN_SIZE) | /* Size */
+ (1 << EPBK0) | /* Double bank */
+ (1 << ALLOC)); /* Allocate */
+
+#if 0
+ UEIENX = ((1 << TXINE)); /* Enable IN complete interrupt */
+#endif
+
+ ao_usb_dump_ep(AO_USB_IN_EP);
+
+ /* Set the OUT max packet size, double buffered */
+ UENUM = AO_USB_OUT_EP;
+ UECONX |= (1 << EPEN); /* Enable */
+
+ UECFG0X = ((2 << EPTYPE0) | /* Bulk */
+ (0 << EPDIR)); /* Out */
+
+ UECFG1X = (EP_SIZE(AO_USB_OUT_SIZE) | /* Size */
+ (1 << EPBK0) | /* Double bank */
+ (1 << ALLOC)); /* Allocate */
+
+ UEIENX = ((1 << RXOUTE)); /* Enable OUT complete interrupt */
+
+ ao_usb_dump_ep(AO_USB_OUT_EP);
+ ao_usb_running = 1;
+}
+
+ISR(USB_GEN_vect)
+{
+ ao_wakeup(&ao_usb_task);
+}
+
+
+__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];
+ }
+}
+
+static void
+ao_usb_ep0_set_in_pending(uint8_t in_pending)
+{
+ ao_usb_ep0_in_pending = in_pending;
+
+ if (in_pending)
+ ueienx_0 = ((1 << RXSTPE) | (1 << RXOUTE) | (1 << TXINE)); /* Enable IN interrupt */
+}
+
+/* Send an IN data packet */
+static void
+ao_usb_ep0_flush(void)
+{
+ __xdata uint8_t this_len;
+
+ cli();
+ UENUM = 0;
+ if (!(UEINTX & (1 << TXINI))) {
+ debug("EP0 not accepting IN data\n");
+ ao_usb_ep0_set_in_pending(1);
+ } else {
+ this_len = ao_usb_ep0_in_len;
+ if (this_len > AO_USB_CONTROL_SIZE)
+ this_len = AO_USB_CONTROL_SIZE;
+
+ ao_usb_ep0_in_len -= this_len;
+
+ /* Set IN interrupt enable */
+ if (ao_usb_ep0_in_len == 0 && this_len != AO_USB_CONTROL_SIZE)
+ ao_usb_ep0_set_in_pending(0);
+ else
+ ao_usb_ep0_set_in_pending(1);
+
+ debug ("Flush EP0 len %d:", this_len);
+ while (this_len--) {
+ uint8_t c = *ao_usb_ep0_in_data++;
+ debug(" %02x", c);
+ UEDATX = c;
+ }
+ debug ("\n");
+
+ /* Clear the TXINI bit to send the packet */
+ UEINTX &= ~(1 << TXINI);
+ }
+ sei();
+}
+
+/* Read data from the ep0 OUT fifo */
+static void
+ao_usb_ep0_fill(uint8_t len, uint8_t ack)
+{
+ if (len > ao_usb_ep0_out_len)
+ len = ao_usb_ep0_out_len;
+ ao_usb_ep0_out_len -= len;
+
+// debug ("EP0 UEINTX %02x UEBCLX %d UEBCHX %d\n",
+// UEINTX, UEBCLX, UEBCHX);
+ /* Pull all of the data out of the packet */
+ debug ("Fill EP0 len %d:", len);
+ UENUM = 0;
+ while (len--) {
+ uint8_t c = UEDATX;
+ *ao_usb_ep0_out_data++ = c;
+ debug (" %02x", c);
+ }
+ debug ("\n");
+
+ /* ACK the packet */
+ UEINTX &= ~ack;
+}
+
+void
+ao_usb_ep0_queue_byte(uint8_t a)
+{
+ ao_usb_ep0_in_buf[ao_usb_ep0_in_len++] = a;
+}
+
+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(8, (1 << RXSTPI) | (1 << RXOUTI) | (1 << TXINI));
+ if (ao_usb_ep0_out_len != 0) {
+ debug ("invalid setup packet length\n");
+ 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;
+ }
+/*
+ UENUM = 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:
+ debug ("Standard setup packet\n");
+ switch(ao_usb_setup.dir_type_recip & AO_USB_SETUP_RECIP_MASK) {
+ case AO_USB_RECIP_DEVICE:
+ debug ("Device setup packet\n");
+ switch(ao_usb_setup.request) {
+ case AO_USB_REQ_GET_STATUS:
+ debug ("get status\n");
+ ao_usb_ep0_queue_byte(0);
+ ao_usb_ep0_queue_byte(0);
+ break;
+ case AO_USB_REQ_SET_ADDRESS:
+ debug ("set address %d\n", ao_usb_setup.value);
+ ao_usb_set_address(ao_usb_setup.value);
+ break;
+ case AO_USB_REQ_GET_DESCRIPTOR:
+ debug ("get descriptor %d\n", ao_usb_setup.value);
+ ao_usb_get_descriptor(ao_usb_setup.value);
+ break;
+ case AO_USB_REQ_GET_CONFIGURATION:
+ debug ("get configuration %d\n", ao_usb_configuration);
+ ao_usb_ep0_queue_byte(ao_usb_configuration);
+ break;
+ case AO_USB_REQ_SET_CONFIGURATION:
+ ao_usb_configuration = ao_usb_setup.value;
+ debug ("set configuration %d\n", ao_usb_configuration);
+ ao_usb_set_configuration();
+ break;
+ }
+ break;
+ case AO_USB_RECIP_INTERFACE:
+#ifndef AVR
+ #pragma disable_warning 110
+#endif
+ debug ("Interface setup packet\n");
+ 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:
+ debug ("Endpoint setup packet\n");
+ 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:
+ debug ("Class setup packet\n");
+ switch (ao_usb_setup.request) {
+ case SET_LINE_CODING:
+ debug ("set line coding\n");
+ ao_usb_ep0_out_len = 7;
+ ao_usb_ep0_out_data = (__xdata uint8_t *) &ao_usb_line_coding;
+ break;
+ case GET_LINE_CODING:
+ debug ("get line coding\n");
+ 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;
+ debug ("Start ep0 in delivery %d\n", ao_usb_ep0_in_len);
+ ao_usb_ep0_set_in_pending(1);
+ }
+}
+
+/* End point 0 receives all of the control messages. */
+static void
+ao_usb_ep0(void)
+{
+ uint8_t intx, udint;
+
+ debug ("usb task started\n");
+ ao_usb_ep0_state = AO_USB_EP0_IDLE;
+ for (;;) {
+ cli();
+ for (;;) {
+ udint = UDINT;
+ UDINT = 0;
+// debug ("UDINT %02x\n", udint);
+ if (udint & (1 << EORSTI)) {
+ ao_usb_configuration = 0;
+ ao_usb_set_ep0();
+ }
+ UENUM = 0;
+ intx = UEINTX;
+// debug ("UEINTX %02x\n", intx);
+ if (intx & ((1 << RXSTPI) | (1 << RXOUTI)))
+ break;
+ if ((intx & (1 << TXINI))) {
+ if (ao_usb_ep0_in_pending)
+ break;
+ else
+ {
+ if (ao_usb_addr_pending) {
+ UDADDR |= (1 << ADDEN);
+ ao_usb_addr_pending = 0;
+ }
+ ueienx_0 = ((1 << RXSTPE) | (1 << RXOUTE)); /* Disable IN interrupt */
+ }
+ }
+// debug ("usb task sleeping...\n");
+ UENUM = 0;
+ UEIENX = ueienx_0;
+ ao_sleep(&ao_usb_task);
+ }
+ sei();
+// debug ("UEINTX for ep0 is %02x\n", intx);
+ if (intx & (1 << RXSTPI)) {
+ ao_usb_ep0_setup();
+ }
+ if (intx & (1 << RXOUTI)) {
+ ao_usb_ep0_fill(UEBCLX, (1 << RXOUTI));
+ ao_usb_ep0_set_in_pending(1);
+ }
+ if (intx & (1 << TXINI) && ao_usb_ep0_in_pending) {
+ debug ("continue sending ep0 IN data\n");
+ ao_usb_ep0_flush();
+ }
+ }
+}
+
+/* Wait for a free IN buffer */
+static void
+ao_usb_in_wait(void)
+{
+ for (;;) {
+ /* Check if the current buffer is writable */
+ UENUM = AO_USB_IN_EP;
+ if (UEINTX & (1 << RWAL))
+ break;
+
+ cli();
+ /* Wait for an IN buffer to be ready */
+ for (;;) {
+ UENUM = AO_USB_IN_EP;
+ if ((UEINTX & (1 << TXINI)))
+ break;
+ UEIENX = (1 << TXINE);
+ ao_sleep(&ao_usb_in_flushed);
+ }
+ /* Ack the interrupt */
+ UEINTX &= ~(1 << TXINI);
+ sei();
+ }
+}
+
+/* Queue the current IN buffer for transmission */
+static void
+ao_usb_in_send(void)
+{
+ UENUM = AO_USB_IN_EP;
+ UEINTX &= ~(1 << FIFOCON);
+}
+
+void
+ao_usb_flush(void) __critical
+{
+ if (!ao_usb_running)
+ return;
+
+ /* Anytime we've sent a character since
+ * the last time we flushed, we'll need
+ * to send a packet -- the only other time
+ * we would send a packet is when that
+ * packet was full, in which case we now
+ * want to send an empty packet
+ */
+ if (!ao_usb_in_flushed) {
+ ao_usb_in_flushed = 1;
+ 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 */
+ UENUM = AO_USB_IN_EP;
+ UEDATX = c;
+
+ /* Send the packet when full */
+ if ((UEINTX & (1 << RWAL)) == 0)
+ ao_usb_in_send();
+ ao_usb_in_flushed = 0;
+}
+
+static char
+_ao_usb_pollchar(void)
+{
+ char c;
+ uint8_t intx;
+
+ if (!ao_usb_running)
+ return AO_READ_AGAIN;
+
+ for (;;) {
+ UENUM = AO_USB_OUT_EP;
+ intx = UEINTX;
+ debug("usb_pollchar UEINTX %02d\n", intx);
+ if (intx & (1 << RWAL))
+ break;
+
+ if (intx & (1 << FIFOCON)) {
+ /* Ack the last packet */
+ UEINTX = (uint8_t) ~(1 << FIFOCON);
+ }
+
+ /* Check to see if a packet has arrived */
+ if ((intx & (1 << RXOUTI)) == 0) {
+ UENUM = AO_USB_OUT_EP;
+ UEIENX = (1 << RXOUTE);
+ return AO_READ_AGAIN;
+ }
+
+ /* Ack the interrupt */
+ UEINTX = ~(1 << RXOUTI);
+ }
+
+ /* Pull a character out of the fifo */
+ c = UEDATX;
+ return c;
+}
+
+char
+ao_usb_pollchar(void)
+{
+ char c;
+ cli();
+ c = _ao_usb_pollchar();
+ sei();
+ return c;
+}
+
+char
+ao_usb_getchar(void) __critical
+{
+ char c;
+
+ cli();
+ while ((c = _ao_usb_pollchar()) == AO_READ_AGAIN)
+ ao_sleep(&ao_stdin_ready);
+ sei();
+ return c;
+}
+
+uint16_t control_count;
+uint16_t in_count;
+uint16_t out_count;
+
+/* Endpoint interrupt */
+ISR(USB_COM_vect)
+{
+ uint8_t old_num = UENUM;
+ uint8_t i = UEINT;
+
+#ifdef AO_LED_RED
+ ao_led_toggle(AO_LED_RED);
+#endif
+ UEINT = 0;
+ if (i & (1 << 0)) {
+ UENUM = 0;
+ UEIENX = 0;
+ ao_wakeup(&ao_usb_task);
+ ++control_count;
+ }
+ if (i & (1 << AO_USB_IN_EP)) {
+ UENUM = AO_USB_IN_EP;
+ UEIENX = 0;
+ ao_wakeup(&ao_usb_in_flushed);
+ in_count++;
+ }
+ if (i & (1 << AO_USB_OUT_EP)) {
+ UENUM = AO_USB_OUT_EP;
+ UEIENX = 0;
+ ao_wakeup(&ao_stdin_ready);
+ ++out_count;
+ }
+ UENUM = old_num;
+}
+
+#if AVR_VCC_5V
+#define AO_PAD_REGULATOR_INIT (1 << UVREGE) /* Turn on pad regulator */
+#endif
+#if AVR_VCC_3V3
+/* TeleScience V0.1 has a hardware bug -- UVcc is hooked up, but UCap is not
+ * Make this work by running power through UVcc to the USB system
+ */
+#define AO_PAD_REGULATOR_INIT (1 << UVREGE) /* Turn off pad regulator */
+#endif
+
+#if AVR_CLOCK == 16000000UL
+#define AO_USB_PLL_INPUT_PRESCALER (1 << PINDIV) /* Divide 16MHz clock by 2 */
+#endif
+#if AVR_CLOCK == 8000000UL
+#define AO_USB_PLL_INPUT_PRESCALER 0 /* Don't divide clock */
+#endif
+
+void
+ao_usb_disable(void)
+{
+ /* Unplug from the bus */
+ UDCON = (1 << DETACH);
+
+ /* Disable the interface */
+ USBCON = 0;
+
+ /* Disable the PLL */
+ PLLCSR = 0;
+
+ /* Turn off the pad regulator */
+ UHWCON = 0;
+}
+
+#define AO_USB_CON ((1 << USBE) | /* USB enable */ \
+ (0 << RSTCPU) | /* do not reset CPU */ \
+ (0 << LSM) | /* Full speed mode */ \
+ (0 << RMWKUP)) /* no remote wake-up */ \
+
+void
+ao_usb_enable(void)
+{
+ /* Configure pad regulator */
+ UHWCON = AO_PAD_REGULATOR_INIT;
+
+ /* Enable USB device, but freeze the clocks until initialized */
+ USBCON = AO_USB_CON | (1 <<FRZCLK);
+
+ /* Enable PLL with appropriate divider */
+ PLLCSR = AO_USB_PLL_INPUT_PRESCALER | (1 << PLLE);
+
+ /* Wait for PLL to lock */
+ loop_until_bit_is_set(PLLCSR, (1 << PLOCK));
+
+ /* Enable USB, enable the VBUS pad */
+ USBCON = AO_USB_CON | (1 << OTGPADE);
+
+ /* Enable global interrupts */
+ UDIEN = (1 << EORSTE); /* End of reset interrupt */
+
+ ao_usb_configuration = 0;
+
+ debug ("ao_usb_enable\n");
+
+ debug ("UHWCON %02x USBCON %02x PLLCSR %02x UDIEN %02x\n",
+ UHWCON, USBCON, PLLCSR, UDIEN);
+ UDCON = (0 << DETACH); /* Clear the DETACH bit to plug into the bus */
+}
+
+#if USB_DEBUG
+struct ao_task __xdata ao_usb_echo_task;
+
+static void
+ao_usb_echo(void)
+{
+ char c;
+
+ for (;;) {
+ c = ao_usb_getchar();
+ ao_usb_putchar(c);
+ ao_usb_flush();
+ }
+}
+#endif
+
+static void
+ao_usb_irq(void)
+{
+ printf ("control: %d out: %d in: %d\n",
+ control_count, out_count, in_count);
+}
+
+__code struct ao_cmds ao_usb_cmds[] = {
+ { ao_usb_irq, "i\0Show USB interrupt counts" },
+ { 0, NULL }
+};
+
+void
+ao_usb_init(void)
+{
+ ao_usb_enable();
+
+ debug ("ao_usb_init\n");
+ ao_add_task(&ao_usb_task, ao_usb_ep0, "usb");
+#if USB_DEBUG
+ ao_add_task(&ao_usb_echo_task, ao_usb_echo, "usb echo");
+#endif
+ ao_cmd_register(&ao_usb_cmds[0]);
+ ao_add_stdio(ao_usb_pollchar, ao_usb_putchar, ao_usb_flush);
+}
projects / fw / altos / blobdiff