--- /dev/null
+/* Teensyduino Core Library
+ * http://www.pjrc.com/teensy/
+ * Copyright (c) 2013 PJRC.COM, LLC.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * 1. The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * 2. If the Software is incorporated into a build system that allows
+ * selection among a list of target devices, then similar target
+ * devices manufactured by PJRC.COM must be included in the list of
+ * target devices and selectable in the same manner.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "usb_dev.h"
+#if F_CPU >= 20000000 && defined(NUM_ENDPOINTS)
+
+#include "kinetis.h"
+//#include "HardwareSerial.h"
+#include "usb_mem.h"
+
+// buffer descriptor table
+
+typedef struct {
+ uint32_t desc;
+ void * addr;
+} bdt_t;
+
+__attribute__ ((section(".usbdescriptortable"), used))
+static bdt_t table[(NUM_ENDPOINTS+1)*4];
+
+static usb_packet_t *rx_first[NUM_ENDPOINTS];
+static usb_packet_t *rx_last[NUM_ENDPOINTS];
+static usb_packet_t *tx_first[NUM_ENDPOINTS];
+static usb_packet_t *tx_last[NUM_ENDPOINTS];
+uint16_t usb_rx_byte_count_data[NUM_ENDPOINTS];
+
+static uint8_t tx_state[NUM_ENDPOINTS];
+#define TX_STATE_BOTH_FREE_EVEN_FIRST 0
+#define TX_STATE_BOTH_FREE_ODD_FIRST 1
+#define TX_STATE_EVEN_FREE 2
+#define TX_STATE_ODD_FREE 3
+#define TX_STATE_NONE_FREE_EVEN_FIRST 4
+#define TX_STATE_NONE_FREE_ODD_FIRST 5
+
+#define BDT_OWN 0x80
+#define BDT_DATA1 0x40
+#define BDT_DATA0 0x00
+#define BDT_DTS 0x08
+#define BDT_STALL 0x04
+#define BDT_PID(n) (((n) >> 2) & 15)
+
+#define BDT_DESC(count, data) (BDT_OWN | BDT_DTS \
+ | ((data) ? BDT_DATA1 : BDT_DATA0) \
+ | ((count) << 16))
+
+#define TX 1
+#define RX 0
+#define ODD 1
+#define EVEN 0
+#define DATA0 0
+#define DATA1 1
+#define index(endpoint, tx, odd) (((endpoint) << 2) | ((tx) << 1) | (odd))
+#define stat2bufferdescriptor(stat) (table + ((stat) >> 2))
+
+
+static union {
+ struct {
+ union {
+ struct {
+ uint8_t bmRequestType;
+ uint8_t bRequest;
+ };
+ uint16_t wRequestAndType;
+ };
+ uint16_t wValue;
+ uint16_t wIndex;
+ uint16_t wLength;
+ };
+ struct {
+ uint32_t word1;
+ uint32_t word2;
+ };
+} setup;
+
+
+#define GET_STATUS 0
+#define CLEAR_FEATURE 1
+#define SET_FEATURE 3
+#define SET_ADDRESS 5
+#define GET_DESCRIPTOR 6
+#define SET_DESCRIPTOR 7
+#define GET_CONFIGURATION 8
+#define SET_CONFIGURATION 9
+#define GET_INTERFACE 10
+#define SET_INTERFACE 11
+#define SYNCH_FRAME 12
+
+// SETUP always uses a DATA0 PID for the data field of the SETUP transaction.
+// transactions in the data phase start with DATA1 and toggle (figure 8-12, USB1.1)
+// Status stage uses a DATA1 PID.
+
+static uint8_t ep0_rx0_buf[EP0_SIZE] __attribute__ ((aligned (4)));
+static uint8_t ep0_rx1_buf[EP0_SIZE] __attribute__ ((aligned (4)));
+static const uint8_t *ep0_tx_ptr = NULL;
+static uint16_t ep0_tx_len;
+static uint8_t ep0_tx_bdt_bank = 0;
+static uint8_t ep0_tx_data_toggle = 0;
+uint8_t usb_rx_memory_needed = 0;
+
+volatile uint8_t usb_configuration = 0;
+volatile uint8_t usb_reboot_timer = 0;
+
+
+static void endpoint0_stall(void)
+{
+ USB0_ENDPT0 = USB_ENDPT_EPSTALL | USB_ENDPT_EPRXEN | USB_ENDPT_EPTXEN | USB_ENDPT_EPHSHK;
+}
+
+
+static void endpoint0_transmit(const void *data, uint32_t len)
+{
+#if 0
+ serial_print("tx0:");
+ serial_phex32((uint32_t)data);
+ serial_print(",");
+ serial_phex16(len);
+ serial_print(ep0_tx_bdt_bank ? ", odd" : ", even");
+ serial_print(ep0_tx_data_toggle ? ", d1\n" : ", d0\n");
+#endif
+ table[index(0, TX, ep0_tx_bdt_bank)].addr = (void *)data;
+ table[index(0, TX, ep0_tx_bdt_bank)].desc = BDT_DESC(len, ep0_tx_data_toggle);
+ ep0_tx_data_toggle ^= 1;
+ ep0_tx_bdt_bank ^= 1;
+}
+
+static uint8_t reply_buffer[8];
+
+static void usb_setup(void)
+{
+ const uint8_t *data = NULL;
+ uint32_t datalen = 0;
+ const usb_descriptor_list_t *list;
+ uint32_t size;
+ volatile uint8_t *reg;
+ uint8_t epconf;
+ const uint8_t *cfg;
+ int i;
+
+ switch (setup.wRequestAndType) {
+ case 0x0500: // SET_ADDRESS
+ break;
+ case 0x0900: // SET_CONFIGURATION
+ //serial_print("configure\n");
+ usb_configuration = setup.wValue;
+ reg = &USB0_ENDPT1;
+ cfg = usb_endpoint_config_table;
+ // clear all BDT entries, free any allocated memory...
+ for (i=4; i < (NUM_ENDPOINTS+1)*4; i++) {
+ if (table[i].desc & BDT_OWN) {
+ usb_free((usb_packet_t *)((uint8_t *)(table[i].addr) - 8));
+ }
+ }
+ // free all queued packets
+ for (i=0; i < NUM_ENDPOINTS; i++) {
+ usb_packet_t *p, *n;
+ p = rx_first[i];
+ while (p) {
+ n = p->next;
+ usb_free(p);
+ p = n;
+ }
+ rx_first[i] = NULL;
+ rx_last[i] = NULL;
+ p = tx_first[i];
+ while (p) {
+ n = p->next;
+ usb_free(p);
+ p = n;
+ }
+ tx_first[i] = NULL;
+ tx_last[i] = NULL;
+ usb_rx_byte_count_data[i] = 0;
+ switch (tx_state[i]) {
+ case TX_STATE_EVEN_FREE:
+ case TX_STATE_NONE_FREE_EVEN_FIRST:
+ tx_state[i] = TX_STATE_BOTH_FREE_EVEN_FIRST;
+ break;
+ case TX_STATE_ODD_FREE:
+ case TX_STATE_NONE_FREE_ODD_FIRST:
+ tx_state[i] = TX_STATE_BOTH_FREE_ODD_FIRST;
+ break;
+ default:
+ break;
+ }
+ }
+ usb_rx_memory_needed = 0;
+ for (i=1; i <= NUM_ENDPOINTS; i++) {
+ epconf = *cfg++;
+ *reg = epconf;
+ reg += 4;
+ if (epconf & USB_ENDPT_EPRXEN) {
+ usb_packet_t *p;
+ p = usb_malloc();
+ if (p) {
+ table[index(i, RX, EVEN)].addr = p->buf;
+ table[index(i, RX, EVEN)].desc = BDT_DESC(64, 0);
+ } else {
+ table[index(i, RX, EVEN)].desc = 0;
+ usb_rx_memory_needed++;
+ }
+ p = usb_malloc();
+ if (p) {
+ table[index(i, RX, ODD)].addr = p->buf;
+ table[index(i, RX, ODD)].desc = BDT_DESC(64, 1);
+ } else {
+ table[index(i, RX, ODD)].desc = 0;
+ usb_rx_memory_needed++;
+ }
+ }
+ table[index(i, TX, EVEN)].desc = 0;
+ table[index(i, TX, ODD)].desc = 0;
+ }
+ break;
+ case 0x0880: // GET_CONFIGURATION
+ reply_buffer[0] = usb_configuration;
+ datalen = 1;
+ data = reply_buffer;
+ break;
+ case 0x0080: // GET_STATUS (device)
+ reply_buffer[0] = 0;
+ reply_buffer[1] = 0;
+ datalen = 2;
+ data = reply_buffer;
+ break;
+ case 0x0082: // GET_STATUS (endpoint)
+ if (setup.wIndex > NUM_ENDPOINTS) {
+ // TODO: do we need to handle IN vs OUT here?
+ endpoint0_stall();
+ return;
+ }
+ reply_buffer[0] = 0;
+ reply_buffer[1] = 0;
+ if (*(uint8_t *)(&USB0_ENDPT0 + setup.wIndex * 4) & 0x02) reply_buffer[0] = 1;
+ data = reply_buffer;
+ datalen = 2;
+ break;
+ case 0x0102: // CLEAR_FEATURE (endpoint)
+ i = setup.wIndex & 0x7F;
+ if (i > NUM_ENDPOINTS || setup.wValue != 0) {
+ // TODO: do we need to handle IN vs OUT here?
+ endpoint0_stall();
+ return;
+ }
+ (*(uint8_t *)(&USB0_ENDPT0 + setup.wIndex * 4)) &= ~0x02;
+ // TODO: do we need to clear the data toggle here?
+ break;
+ case 0x0302: // SET_FEATURE (endpoint)
+ i = setup.wIndex & 0x7F;
+ if (i > NUM_ENDPOINTS || setup.wValue != 0) {
+ // TODO: do we need to handle IN vs OUT here?
+ endpoint0_stall();
+ return;
+ }
+ (*(uint8_t *)(&USB0_ENDPT0 + setup.wIndex * 4)) |= 0x02;
+ // TODO: do we need to clear the data toggle here?
+ break;
+ case 0x0680: // GET_DESCRIPTOR
+ case 0x0681:
+ //serial_print("desc:");
+ //serial_phex16(setup.wValue);
+ //serial_print("\n");
+ for (list = usb_descriptor_list; 1; list++) {
+ if (list->addr == NULL) break;
+ //if (setup.wValue == list->wValue &&
+ //(setup.wIndex == list->wIndex) || ((setup.wValue >> 8) == 3)) {
+ if (setup.wValue == list->wValue && setup.wIndex == list->wIndex) {
+ data = list->addr;
+ if ((setup.wValue >> 8) == 3) {
+ // for string descriptors, use the descriptor's
+ // length field, allowing runtime configured
+ // length.
+ datalen = *(list->addr);
+ } else {
+ datalen = list->length;
+ }
+#if 0
+ serial_print("Desc found, ");
+ serial_phex32((uint32_t)data);
+ serial_print(",");
+ serial_phex16(datalen);
+ serial_print(",");
+ serial_phex(data[0]);
+ serial_phex(data[1]);
+ serial_phex(data[2]);
+ serial_phex(data[3]);
+ serial_phex(data[4]);
+ serial_phex(data[5]);
+ serial_print("\n");
+#endif
+ goto send;
+ }
+ }
+ //serial_print("desc: not found\n");
+ endpoint0_stall();
+ return;
+#if defined(CDC_STATUS_INTERFACE)
+ case 0x2221: // CDC_SET_CONTROL_LINE_STATE
+ usb_cdc_line_rtsdtr = setup.wValue;
+ //serial_print("set control line state\n");
+ break;
+ case 0x2321: // CDC_SEND_BREAK
+ break;
+ case 0x2021: // CDC_SET_LINE_CODING
+ //serial_print("set coding, waiting...\n");
+ return;
+#endif
+
+// TODO: this does not work... why?
+#if defined(SEREMU_INTERFACE) || defined(KEYBOARD_INTERFACE)
+ case 0x0921: // HID SET_REPORT
+ //serial_print(":)\n");
+ return;
+ case 0x0A21: // HID SET_IDLE
+ break;
+ // case 0xC940:
+#endif
+ default:
+ endpoint0_stall();
+ return;
+ }
+ send:
+ //serial_print("setup send ");
+ //serial_phex32(data);
+ //serial_print(",");
+ //serial_phex16(datalen);
+ //serial_print("\n");
+
+ if (datalen > setup.wLength) datalen = setup.wLength;
+ size = datalen;
+ if (size > EP0_SIZE) size = EP0_SIZE;
+ endpoint0_transmit(data, size);
+ data += size;
+ datalen -= size;
+ if (datalen == 0 && size < EP0_SIZE) return;
+
+ size = datalen;
+ if (size > EP0_SIZE) size = EP0_SIZE;
+ endpoint0_transmit(data, size);
+ data += size;
+ datalen -= size;
+ if (datalen == 0 && size < EP0_SIZE) return;
+
+ ep0_tx_ptr = data;
+ ep0_tx_len = datalen;
+}
+
+
+
+//A bulk endpoint's toggle sequence is initialized to DATA0 when the endpoint
+//experiences any configuration event (configuration events are explained in
+//Sections 9.1.1.5 and 9.4.5).
+
+//Configuring a device or changing an alternate setting causes all of the status
+//and configuration values associated with endpoints in the affected interfaces
+//to be set to their default values. This includes setting the data toggle of
+//any endpoint using data toggles to the value DATA0.
+
+//For endpoints using data toggle, regardless of whether an endpoint has the
+//Halt feature set, a ClearFeature(ENDPOINT_HALT) request always results in the
+//data toggle being reinitialized to DATA0.
+
+
+
+// #define stat2bufferdescriptor(stat) (table + ((stat) >> 2))
+
+static void usb_control(uint32_t stat)
+{
+ bdt_t *b;
+ uint32_t pid, size;
+ uint8_t *buf;
+ const uint8_t *data;
+
+ b = stat2bufferdescriptor(stat);
+ pid = BDT_PID(b->desc);
+ //count = b->desc >> 16;
+ buf = b->addr;
+ //serial_print("pid:");
+ //serial_phex(pid);
+ //serial_print(", count:");
+ //serial_phex(count);
+ //serial_print("\n");
+
+ switch (pid) {
+ case 0x0D: // Setup received from host
+ //serial_print("PID=Setup\n");
+ //if (count != 8) ; // panic?
+ // grab the 8 byte setup info
+ setup.word1 = *(uint32_t *)(buf);
+ setup.word2 = *(uint32_t *)(buf + 4);
+
+ // give the buffer back
+ b->desc = BDT_DESC(EP0_SIZE, DATA1);
+ //table[index(0, RX, EVEN)].desc = BDT_DESC(EP0_SIZE, 1);
+ //table[index(0, RX, ODD)].desc = BDT_DESC(EP0_SIZE, 1);
+
+ // clear any leftover pending IN transactions
+ ep0_tx_ptr = NULL;
+ if (ep0_tx_data_toggle) {
+ }
+ //if (table[index(0, TX, EVEN)].desc & 0x80) {
+ //serial_print("leftover tx even\n");
+ //}
+ //if (table[index(0, TX, ODD)].desc & 0x80) {
+ //serial_print("leftover tx odd\n");
+ //}
+ table[index(0, TX, EVEN)].desc = 0;
+ table[index(0, TX, ODD)].desc = 0;
+ // first IN after Setup is always DATA1
+ ep0_tx_data_toggle = 1;
+
+#if 0
+ serial_print("bmRequestType:");
+ serial_phex(setup.bmRequestType);
+ serial_print(", bRequest:");
+ serial_phex(setup.bRequest);
+ serial_print(", wValue:");
+ serial_phex16(setup.wValue);
+ serial_print(", wIndex:");
+ serial_phex16(setup.wIndex);
+ serial_print(", len:");
+ serial_phex16(setup.wLength);
+ serial_print("\n");
+#endif
+ // actually "do" the setup request
+ usb_setup();
+ // unfreeze the USB, now that we're ready
+ USB0_CTL = USB_CTL_USBENSOFEN; // clear TXSUSPENDTOKENBUSY bit
+ break;
+ case 0x01: // OUT transaction received from host
+ case 0x02:
+ //serial_print("PID=OUT\n");
+#ifdef CDC_STATUS_INTERFACE
+ if (setup.wRequestAndType == 0x2021 /*CDC_SET_LINE_CODING*/) {
+ int i;
+ uint8_t *dst = (uint8_t *)usb_cdc_line_coding;
+ //serial_print("set line coding ");
+ for (i=0; i<7; i++) {
+ //serial_phex(*buf);
+ *dst++ = *buf++;
+ }
+ //serial_phex32(usb_cdc_line_coding[0]);
+ //serial_print("\n");
+ if (usb_cdc_line_coding[0] == 134) usb_reboot_timer = 15;
+ endpoint0_transmit(NULL, 0);
+ }
+#endif
+#ifdef KEYBOARD_INTERFACE
+ if (setup.word1 == 0x02000921 && setup.word2 == ((1<<16)|KEYBOARD_INTERFACE)) {
+ keyboard_leds = buf[0];
+ endpoint0_transmit(NULL, 0);
+ }
+#endif
+#ifdef SEREMU_INTERFACE
+ if (setup.word1 == 0x03000921 && setup.word2 == ((4<<16)|SEREMU_INTERFACE)
+ && buf[0] == 0xA9 && buf[1] == 0x45 && buf[2] == 0xC2 && buf[3] == 0x6B) {
+ usb_reboot_timer = 5;
+ endpoint0_transmit(NULL, 0);
+ }
+#endif
+ // give the buffer back
+ b->desc = BDT_DESC(EP0_SIZE, DATA1);
+ break;
+
+ case 0x09: // IN transaction completed to host
+ //serial_print("PID=IN:");
+ //serial_phex(stat);
+ //serial_print("\n");
+
+ // send remaining data, if any...
+ data = ep0_tx_ptr;
+ if (data) {
+ size = ep0_tx_len;
+ if (size > EP0_SIZE) size = EP0_SIZE;
+ endpoint0_transmit(data, size);
+ data += size;
+ ep0_tx_len -= size;
+ ep0_tx_ptr = (ep0_tx_len > 0 || size == EP0_SIZE) ? data : NULL;
+ }
+
+ if (setup.bRequest == 5 && setup.bmRequestType == 0) {
+ setup.bRequest = 0;
+ //serial_print("set address: ");
+ //serial_phex16(setup.wValue);
+ //serial_print("\n");
+ USB0_ADDR = setup.wValue;
+ }
+
+ break;
+ //default:
+ //serial_print("PID=unknown:");
+ //serial_phex(pid);
+ //serial_print("\n");
+ }
+ USB0_CTL = USB_CTL_USBENSOFEN; // clear TXSUSPENDTOKENBUSY bit
+}
+
+
+
+
+
+
+usb_packet_t *usb_rx(uint32_t endpoint)
+{
+ usb_packet_t *ret;
+ endpoint--;
+ if (endpoint >= NUM_ENDPOINTS) return NULL;
+ __mask_irq();
+ ret = rx_first[endpoint];
+ if (ret) {
+ rx_first[endpoint] = ret->next;
+ usb_rx_byte_count_data[endpoint] -= ret->len;
+ }
+ __unmask_irq();
+ //serial_print("rx, epidx=");
+ //serial_phex(endpoint);
+ //serial_print(", packet=");
+ //serial_phex32(ret);
+ //serial_print("\n");
+ return ret;
+}
+
+static uint32_t usb_queue_byte_count(const usb_packet_t *p)
+{
+ uint32_t count=0;
+
+ __mask_irq();
+ for ( ; p; p = p->next) {
+ count += p->len;
+ }
+ __unmask_irq();
+ return count;
+}
+
+// TODO: make this an inline function...
+/*
+uint32_t usb_rx_byte_count(uint32_t endpoint)
+{
+ endpoint--;
+ if (endpoint >= NUM_ENDPOINTS) return 0;
+ return usb_rx_byte_count_data[endpoint];
+ //return usb_queue_byte_count(rx_first[endpoint]);
+}
+*/
+
+uint32_t usb_tx_byte_count(uint32_t endpoint)
+{
+ endpoint--;
+ if (endpoint >= NUM_ENDPOINTS) return 0;
+ return usb_queue_byte_count(tx_first[endpoint]);
+}
+
+uint32_t usb_tx_packet_count(uint32_t endpoint)
+{
+ const usb_packet_t *p;
+ uint32_t count=0;
+
+ endpoint--;
+ if (endpoint >= NUM_ENDPOINTS) return 0;
+ __mask_irq();
+ for (p = tx_first[endpoint]; p; p = p->next) count++;
+ __unmask_irq();
+ return count;
+}
+
+
+// Called from usb_free, but only when usb_rx_memory_needed > 0, indicating
+// receive endpoints are starving for memory. The intention is to give
+// endpoints needing receive memory priority over the user's code, which is
+// likely calling usb_malloc to obtain memory for transmitting. When the
+// user is creating data very quickly, their consumption could starve reception
+// without this prioritization. The packet buffer (input) is assigned to the
+// first endpoint needing memory.
+//
+void usb_rx_memory(usb_packet_t *packet)
+{
+ unsigned int i;
+ const uint8_t *cfg;
+
+ cfg = usb_endpoint_config_table;
+ //serial_print("rx_mem:");
+ __mask_irq();
+ for (i=1; i <= NUM_ENDPOINTS; i++) {
+ if (*cfg++ & USB_ENDPT_EPRXEN) {
+ if (table[index(i, RX, EVEN)].desc == 0) {
+ table[index(i, RX, EVEN)].addr = packet->buf;
+ table[index(i, RX, EVEN)].desc = BDT_DESC(64, 0);
+ usb_rx_memory_needed--;
+ __unmask_irq();
+ //serial_phex(i);
+ //serial_print(",even\n");
+ return;
+ }
+ if (table[index(i, RX, ODD)].desc == 0) {
+ table[index(i, RX, ODD)].addr = packet->buf;
+ table[index(i, RX, ODD)].desc = BDT_DESC(64, 1);
+ usb_rx_memory_needed--;
+ __unmask_irq();
+ //serial_phex(i);
+ //serial_print(",odd\n");
+ return;
+ }
+ }
+ }
+ __unmask_irq();
+ // we should never reach this point. If we get here, it means
+ // usb_rx_memory_needed was set greater than zero, but no memory
+ // was actually needed.
+ usb_rx_memory_needed = 0;
+ usb_free(packet);
+ return;
+}
+
+//#define index(endpoint, tx, odd) (((endpoint) << 2) | ((tx) << 1) | (odd))
+//#define stat2bufferdescriptor(stat) (table + ((stat) >> 2))
+
+void usb_tx(uint32_t endpoint, usb_packet_t *packet)
+{
+ bdt_t *b = &table[index(endpoint, TX, EVEN)];
+ uint8_t next;
+
+ endpoint--;
+ if (endpoint >= NUM_ENDPOINTS) return;
+ __mask_irq();
+ //serial_print("txstate=");
+ //serial_phex(tx_state[endpoint]);
+ //serial_print("\n");
+ switch (tx_state[endpoint]) {
+ case TX_STATE_BOTH_FREE_EVEN_FIRST:
+ next = TX_STATE_ODD_FREE;
+ break;
+ case TX_STATE_BOTH_FREE_ODD_FIRST:
+ b++;
+ next = TX_STATE_EVEN_FREE;
+ break;
+ case TX_STATE_EVEN_FREE:
+ next = TX_STATE_NONE_FREE_ODD_FIRST;
+ break;
+ case TX_STATE_ODD_FREE:
+ b++;
+ next = TX_STATE_NONE_FREE_EVEN_FIRST;
+ break;
+ default:
+ if (tx_first[endpoint] == NULL) {
+ tx_first[endpoint] = packet;
+ } else {
+ tx_last[endpoint]->next = packet;
+ }
+ tx_last[endpoint] = packet;
+ __unmask_irq();
+ return;
+ }
+ tx_state[endpoint] = next;
+ b->addr = packet->buf;
+ b->desc = BDT_DESC(packet->len, ((uint32_t)b & 8) ? DATA1 : DATA0);
+ __unmask_irq();
+}
+
+
+
+
+
+
+void _reboot_Teensyduino_(void)
+{
+ // TODO: initialize R0 with a code....
+ __asm__ volatile("bkpt");
+}
+
+
+
+void usb_isr(void)
+{
+ uint8_t status, stat, t;
+
+ //serial_print("isr");
+ //status = USB0_ISTAT;
+ //serial_phex(status);
+ //serial_print("\n");
+ restart:
+ status = USB0_ISTAT;
+
+ if ((status & USB_INTEN_SOFTOKEN /* 04 */ )) {
+ if (usb_configuration) {
+ t = usb_reboot_timer;
+ if (t) {
+ usb_reboot_timer = --t;
+ if (!t) _reboot_Teensyduino_();
+ }
+#ifdef CDC_DATA_INTERFACE
+ t = usb_cdc_transmit_flush_timer;
+ if (t) {
+ usb_cdc_transmit_flush_timer = --t;
+ if (t == 0) usb_serial_flush_callback();
+ }
+#endif
+#ifdef SEREMU_INTERFACE
+ t = usb_seremu_transmit_flush_timer;
+ if (t) {
+ usb_seremu_transmit_flush_timer = --t;
+ if (t == 0) usb_seremu_flush_callback();
+ }
+#endif
+#ifdef MIDI_INTERFACE
+ usb_midi_flush_output();
+#endif
+#ifdef FLIGHTSIM_INTERFACE
+ usb_flightsim_flush_callback();
+#endif
+ }
+ USB0_ISTAT = USB_INTEN_SOFTOKEN;
+ }
+
+ if ((status & USB_ISTAT_TOKDNE /* 08 */ )) {
+ uint8_t endpoint;
+ stat = USB0_STAT;
+ //serial_print("token: ep=");
+ //serial_phex(stat >> 4);
+ //serial_print(stat & 0x08 ? ",tx" : ",rx");
+ //serial_print(stat & 0x04 ? ",odd\n" : ",even\n");
+ endpoint = stat >> 4;
+ if (endpoint == 0) {
+ usb_control(stat);
+ } else {
+ bdt_t *b = stat2bufferdescriptor(stat);
+ usb_packet_t *packet = (usb_packet_t *)((uint8_t *)(b->addr) - 8);
+#if 0
+ serial_print("ep:");
+ serial_phex(endpoint);
+ serial_print(", pid:");
+ serial_phex(BDT_PID(b->desc));
+ serial_print(((uint32_t)b & 8) ? ", odd" : ", even");
+ serial_print(", count:");
+ serial_phex(b->desc >> 16);
+ serial_print("\n");
+#endif
+ endpoint--; // endpoint is index to zero-based arrays
+
+ if (stat & 0x08) { // transmit
+ usb_free(packet);
+ packet = tx_first[endpoint];
+ if (packet) {
+ //serial_print("tx packet\n");
+ tx_first[endpoint] = packet->next;
+ b->addr = packet->buf;
+ switch (tx_state[endpoint]) {
+ case TX_STATE_BOTH_FREE_EVEN_FIRST:
+ tx_state[endpoint] = TX_STATE_ODD_FREE;
+ break;
+ case TX_STATE_BOTH_FREE_ODD_FIRST:
+ tx_state[endpoint] = TX_STATE_EVEN_FREE;
+ break;
+ case TX_STATE_EVEN_FREE:
+ tx_state[endpoint] = TX_STATE_NONE_FREE_ODD_FIRST;
+ break;
+ case TX_STATE_ODD_FREE:
+ tx_state[endpoint] = TX_STATE_NONE_FREE_EVEN_FIRST;
+ break;
+ default:
+ break;
+ }
+ b->desc = BDT_DESC(packet->len, ((uint32_t)b & 8) ? DATA1 : DATA0);
+ } else {
+ //serial_print("tx no packet\n");
+ switch (tx_state[endpoint]) {
+ case TX_STATE_BOTH_FREE_EVEN_FIRST:
+ case TX_STATE_BOTH_FREE_ODD_FIRST:
+ break;
+ case TX_STATE_EVEN_FREE:
+ tx_state[endpoint] = TX_STATE_BOTH_FREE_EVEN_FIRST;
+ break;
+ case TX_STATE_ODD_FREE:
+ tx_state[endpoint] = TX_STATE_BOTH_FREE_ODD_FIRST;
+ break;
+ default:
+ tx_state[endpoint] = ((uint32_t)b & 8) ?
+ TX_STATE_ODD_FREE : TX_STATE_EVEN_FREE;
+ break;
+ }
+ }
+ } else { // receive
+ packet->len = b->desc >> 16;
+ if (packet->len > 0) {
+ packet->index = 0;
+ packet->next = NULL;
+ if (rx_first[endpoint] == NULL) {
+ //serial_print("rx 1st, epidx=");
+ //serial_phex(endpoint);
+ //serial_print(", packet=");
+ //serial_phex32((uint32_t)packet);
+ //serial_print("\n");
+ rx_first[endpoint] = packet;
+ } else {
+ //serial_print("rx Nth, epidx=");
+ //serial_phex(endpoint);
+ //serial_print(", packet=");
+ //serial_phex32((uint32_t)packet);
+ //serial_print("\n");
+ rx_last[endpoint]->next = packet;
+ }
+ rx_last[endpoint] = packet;
+ usb_rx_byte_count_data[endpoint] += packet->len;
+ // TODO: implement a per-endpoint maximum # of allocated packets
+ // so a flood of incoming data on 1 endpoint doesn't starve
+ // the others if the user isn't reading it regularly
+ packet = usb_malloc();
+ if (packet) {
+ b->addr = packet->buf;
+ b->desc = BDT_DESC(64, ((uint32_t)b & 8) ? DATA1 : DATA0);
+ } else {
+ //serial_print("starving ");
+ //serial_phex(endpoint + 1);
+ //serial_print(((uint32_t)b & 8) ? ",odd\n" : ",even\n");
+ b->desc = 0;
+ usb_rx_memory_needed++;
+ }
+ } else {
+ b->desc = BDT_DESC(64, ((uint32_t)b & 8) ? DATA1 : DATA0);
+ }
+ }
+
+
+
+
+ }
+ USB0_ISTAT = USB_ISTAT_TOKDNE;
+ goto restart;
+ }
+
+
+
+ if (status & USB_ISTAT_USBRST /* 01 */ ) {
+ //serial_print("reset\n");
+
+ // initialize BDT toggle bits
+ USB0_CTL = USB_CTL_ODDRST;
+ ep0_tx_bdt_bank = 0;
+
+ // set up buffers to receive Setup and OUT packets
+ table[index(0, RX, EVEN)].desc = BDT_DESC(EP0_SIZE, 0);
+ table[index(0, RX, EVEN)].addr = ep0_rx0_buf;
+ table[index(0, RX, ODD)].desc = BDT_DESC(EP0_SIZE, 0);
+ table[index(0, RX, ODD)].addr = ep0_rx1_buf;
+ table[index(0, TX, EVEN)].desc = 0;
+ table[index(0, TX, ODD)].desc = 0;
+
+ // activate endpoint 0
+ USB0_ENDPT0 = USB_ENDPT_EPRXEN | USB_ENDPT_EPTXEN | USB_ENDPT_EPHSHK;
+
+ // clear all ending interrupts
+ USB0_ERRSTAT = 0xFF;
+ USB0_ISTAT = 0xFF;
+
+ // set the address to zero during enumeration
+ USB0_ADDR = 0;
+
+ // enable other interrupts
+ USB0_ERREN = 0xFF;
+ USB0_INTEN = USB_INTEN_TOKDNEEN |
+ USB_INTEN_SOFTOKEN |
+ USB_INTEN_STALLEN |
+ USB_INTEN_ERROREN |
+ USB_INTEN_USBRSTEN |
+ USB_INTEN_SLEEPEN;
+
+ // is this necessary?
+ USB0_CTL = USB_CTL_USBENSOFEN;
+ return;
+ }
+
+
+ if ((status & USB_ISTAT_STALL /* 80 */ )) {
+ //serial_print("stall:\n");
+ USB0_ENDPT0 = USB_ENDPT_EPRXEN | USB_ENDPT_EPTXEN | USB_ENDPT_EPHSHK;
+ USB0_ISTAT = USB_ISTAT_STALL;
+ }
+ if ((status & USB_ISTAT_ERROR /* 02 */ )) {
+ uint8_t err = USB0_ERRSTAT;
+ USB0_ERRSTAT = err;
+ //serial_print("err:");
+ //serial_phex(err);
+ //serial_print("\n");
+ USB0_ISTAT = USB_ISTAT_ERROR;
+ }
+
+ if ((status & USB_ISTAT_SLEEP /* 10 */ )) {
+ //serial_print("sleep\n");
+ USB0_ISTAT = USB_ISTAT_SLEEP;
+ }
+
+}
+
+
+
+void usb_init(void)
+{
+ int i;
+
+ //serial_begin(BAUD2DIV(115200));
+ //serial_print("usb_init\n");
+
+ usb_init_serialnumber();
+
+ for (i=0; i <= NUM_ENDPOINTS*4; i++) {
+ table[i].desc = 0;
+ table[i].addr = 0;
+ }
+
+ // this basically follows the flowchart in the Kinetis
+ // Quick Reference User Guide, Rev. 1, 03/2012, page 141
+
+ // assume 48 MHz clock already running
+ // SIM - enable clock
+ SIM_SCGC4 |= SIM_SCGC4_USBOTG;
+
+ // reset USB module
+ USB0_USBTRC0 = USB_USBTRC_USBRESET;
+ while ((USB0_USBTRC0 & USB_USBTRC_USBRESET) != 0) ; // wait for reset to end
+
+ // set desc table base addr
+ USB0_BDTPAGE1 = ((uint32_t)table) >> 8;
+ USB0_BDTPAGE2 = ((uint32_t)table) >> 16;
+ USB0_BDTPAGE3 = ((uint32_t)table) >> 24;
+
+ // clear all ISR flags
+ USB0_ISTAT = 0xFF;
+ USB0_ERRSTAT = 0xFF;
+ USB0_OTGISTAT = 0xFF;
+
+ USB0_USBTRC0 |= 0x40; // undocumented bit
+
+ // enable USB
+ USB0_CTL = USB_CTL_USBENSOFEN;
+ USB0_USBCTRL = 0;
+
+ // enable reset interrupt
+ USB0_INTEN = USB_INTEN_USBRSTEN;
+
+ // enable interrupt in NVIC...
+ NVIC_SET_PRIORITY(IRQ_USBOTG, 112);
+ NVIC_ENABLE_IRQ(IRQ_USBOTG);
+
+ // enable d+ pullup
+ USB0_CONTROL = USB_CONTROL_DPPULLUPNONOTG;
+}
+
+
+#else // F_CPU < 20 MHz && defined(NUM_ENDPOINTS)
+
+void usb_init(void)
+{
+}
+
+#endif // F_CPU >= 20 MHz && defined(NUM_ENDPOINTS)
notaz.gp2x.de / megadrive.git / blobdiff