|
-
-
- #include "usb_dev.h"
- #if F_CPU >= 20000000 && defined(NUM_ENDPOINTS)
-
- #include "kinetis.h"
-
- #include "usb_mem.h"
- #include <string.h> // for memset
-
-
-
- #if defined(__MKL26Z64__)
- #pragma GCC optimize ("Os")
- #else
- #pragma GCC optimize ("O3")
- #endif
-
-
-
- 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
-
-
-
-
-
- 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:
- break;
- case 0x0900:
-
- usb_configuration = setup.wValue;
- reg = &USB0_ENDPT1;
- cfg = usb_endpoint_config_table;
-
- 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));
- }
- }
-
- 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;
- #ifdef AUDIO_INTERFACE
- if (i == AUDIO_RX_ENDPOINT) {
- table[index(i, RX, EVEN)].addr = usb_audio_receive_buffer;
- table[index(i, RX, EVEN)].desc = (AUDIO_RX_SIZE<<16) | BDT_OWN;
- table[index(i, RX, ODD)].addr = usb_audio_receive_buffer;
- table[index(i, RX, ODD)].desc = (AUDIO_RX_SIZE<<16) | BDT_OWN;
- } else
- #endif
- 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;
- #ifdef AUDIO_INTERFACE
- if (i == AUDIO_SYNC_ENDPOINT) {
- table[index(i, TX, EVEN)].addr = &usb_audio_sync_feedback;
- table[index(i, TX, EVEN)].desc = (3<<16) | BDT_OWN;
- }
- #endif
- }
- break;
- case 0x0880:
- reply_buffer[0] = usb_configuration;
- datalen = 1;
- data = reply_buffer;
- break;
- case 0x0080:
- reply_buffer[0] = 0;
- reply_buffer[1] = 0;
- datalen = 2;
- data = reply_buffer;
- break;
- case 0x0082:
- i = setup.wIndex & 0x7F;
- if (i > NUM_ENDPOINTS) {
-
- endpoint0_stall();
- return;
- }
- reply_buffer[0] = 0;
- reply_buffer[1] = 0;
- if (*(uint8_t *)(&USB0_ENDPT0 + i * 4) & 0x02) reply_buffer[0] = 1;
- data = reply_buffer;
- datalen = 2;
- break;
- case 0x0102:
- i = setup.wIndex & 0x7F;
- if (i > NUM_ENDPOINTS || setup.wValue != 0) {
-
- endpoint0_stall();
- return;
- }
- (*(uint8_t *)(&USB0_ENDPT0 + i * 4)) &= ~0x02;
-
- break;
- case 0x0302:
- i = setup.wIndex & 0x7F;
- if (i > NUM_ENDPOINTS || setup.wValue != 0) {
-
- endpoint0_stall();
- return;
- }
- (*(uint8_t *)(&USB0_ENDPT0 + i * 4)) |= 0x02;
-
- break;
- case 0x0680:
- case 0x0681:
-
-
-
- for (list = usb_descriptor_list; 1; list++) {
- if (list->addr == NULL) break;
-
-
- if (setup.wValue == list->wValue && setup.wIndex == list->wIndex) {
- data = list->addr;
- if ((setup.wValue >> 8) == 3) {
-
-
-
- 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;
- }
- }
-
- endpoint0_stall();
- return;
- #if defined(CDC_STATUS_INTERFACE)
- case 0x2221:
- usb_cdc_line_rtsdtr_millis = systick_millis_count;
- usb_cdc_line_rtsdtr = setup.wValue;
-
- break;
- case 0x2321:
- break;
- case 0x2021:
-
- return;
- #endif
-
- #if defined(MTP_INTERFACE)
- case 0x64A1:
-
- endpoint0_stall();
- return;
- case 0x66A1:
-
- endpoint0_stall();
- return;
- case 0x67A1:
-
- reply_buffer[0] = 0x4;
- reply_buffer[1] = 0;
- reply_buffer[2] = 0x01;
- reply_buffer[3] = 0x20;
- data = reply_buffer;
- datalen = 4;
- break;
- #endif
-
-
- #if defined(SEREMU_INTERFACE) || defined(KEYBOARD_INTERFACE)
- case 0x0921:
-
- return;
- case 0x0A21:
- break;
-
- #endif
-
- #if defined(AUDIO_INTERFACE)
- case 0x0B01:
- if (setup.wIndex == AUDIO_INTERFACE+1) {
- usb_audio_transmit_setting = setup.wValue;
- if (usb_audio_transmit_setting > 0) {
- bdt_t *b = &table[index(AUDIO_TX_ENDPOINT, TX, EVEN)];
- uint8_t state = tx_state[AUDIO_TX_ENDPOINT-1];
- if (state) b++;
- if (!(b->desc & BDT_OWN)) {
- memset(usb_audio_transmit_buffer, 0, 176);
- b->addr = usb_audio_transmit_buffer;
- b->desc = (176 << 16) | BDT_OWN;
- tx_state[AUDIO_TX_ENDPOINT-1] = state ^ 1;
- }
- }
- } else if (setup.wIndex == AUDIO_INTERFACE+2) {
- usb_audio_receive_setting = setup.wValue;
- } else {
- endpoint0_stall();
- return;
- }
- break;
- case 0x0A81:
- datalen = 1;
- data = reply_buffer;
- if (setup.wIndex == AUDIO_INTERFACE+1) {
- reply_buffer[0] = usb_audio_transmit_setting;
- } else if (setup.wIndex == AUDIO_INTERFACE+2) {
- reply_buffer[0] = usb_audio_receive_setting;
- } else {
- endpoint0_stall();
- return;
- }
- break;
- case 0x0121:
- case 0x0221:
- case 0x0321:
- case 0x0421:
-
- return;
- case 0x81A1:
- case 0x82A1:
- case 0x83A1:
- case 0x84A1:
- if (usb_audio_get_feature(&setup, reply_buffer, &datalen)) {
- data = reply_buffer;
- }
- else {
- endpoint0_stall();
- return;
- }
- break;
-
- case 0x81A2:
- if (setup.wLength >= 3) {
- reply_buffer[0] = 44100 & 255;
- reply_buffer[1] = 44100 >> 8;
- reply_buffer[2] = 0;
- datalen = 3;
- data = reply_buffer;
- } else {
- endpoint0_stall();
- return;
- }
- break;
- #endif
-
- #if defined(MULTITOUCH_INTERFACE)
- case 0x01A1:
- if (setup.wValue == 0x0300 && setup.wIndex == MULTITOUCH_INTERFACE) {
- reply_buffer[0] = MULTITOUCH_FINGERS;
- data = reply_buffer;
- datalen = 1;
- } else if (setup.wValue == 0x0100 && setup.wIndex == MULTITOUCH_INTERFACE) {
- memset(reply_buffer, 0, 8);
- data = reply_buffer;
- datalen = 8;
- } else {
- endpoint0_stall();
- return;
- }
- break;
- #endif
- default:
- endpoint0_stall();
- return;
- }
- send:
-
-
-
-
-
-
- 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;
- }
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- 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);
-
- buf = b->addr;
-
-
-
-
-
-
- switch (pid) {
- case 0x0D:
-
-
-
- setup.word1 = *(uint32_t *)(buf);
- setup.word2 = *(uint32_t *)(buf + 4);
-
-
- b->desc = BDT_DESC(EP0_SIZE, DATA1);
-
-
-
-
- ep0_tx_ptr = NULL;
- if (ep0_tx_data_toggle) {
- }
-
-
-
-
-
-
- table[index(0, TX, EVEN)].desc = 0;
- table[index(0, TX, ODD)].desc = 0;
-
- 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
-
- usb_setup();
-
- USB0_CTL = USB_CTL_USBENSOFEN;
- break;
- case 0x01:
- case 0x02:
-
- #ifdef CDC_STATUS_INTERFACE
- if (setup.wRequestAndType == 0x2021 ) {
- int i;
- uint8_t *dst = (uint8_t *)usb_cdc_line_coding;
-
- for (i=0; i<7; i++) {
-
- *dst++ = *buf++;
- }
-
-
- 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
- #ifdef AUDIO_INTERFACE
- if (usb_audio_set_feature(&setup, buf)) {
- endpoint0_transmit(NULL, 0);
- }
- #endif
-
- b->desc = BDT_DESC(EP0_SIZE, DATA1);
- break;
-
- case 0x09:
-
-
-
-
-
- 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;
-
-
-
- USB0_ADDR = setup.wValue;
- }
-
- break;
-
-
-
-
- }
- USB0_CTL = USB_CTL_USBENSOFEN;
- }
-
-
-
-
-
-
- usb_packet_t *usb_rx(uint32_t endpoint)
- {
- usb_packet_t *ret;
- endpoint--;
- if (endpoint >= NUM_ENDPOINTS) return NULL;
- __disable_irq();
- ret = rx_first[endpoint];
- if (ret) {
- rx_first[endpoint] = ret->next;
- usb_rx_byte_count_data[endpoint] -= ret->len;
- }
- __enable_irq();
-
-
-
-
-
- return ret;
- }
-
- static uint32_t usb_queue_byte_count(const usb_packet_t *p)
- {
- uint32_t count=0;
-
- __disable_irq();
- for ( ; p; p = p->next) {
- count += p->len;
- }
- __enable_irq();
- return count;
- }
-
-
-
-
- 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;
- __disable_irq();
- for (p = tx_first[endpoint]; p; p = p->next) count++;
- __enable_irq();
- return count;
- }
-
-
-
-
-
-
-
-
-
-
- void usb_rx_memory(usb_packet_t *packet)
- {
- unsigned int i;
- const uint8_t *cfg;
-
- cfg = usb_endpoint_config_table;
-
- __disable_irq();
- for (i=1; i <= NUM_ENDPOINTS; i++) {
- #ifdef AUDIO_INTERFACE
- if (i == AUDIO_RX_ENDPOINT) continue;
- #endif
- 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--;
- __enable_irq();
-
-
- 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--;
- __enable_irq();
-
-
- return;
- }
- }
- }
- __enable_irq();
-
-
-
- usb_rx_memory_needed = 0;
- usb_free(packet);
- return;
- }
-
-
-
-
- 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;
- __disable_irq();
-
-
-
- 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;
- __enable_irq();
- return;
- }
- tx_state[endpoint] = next;
- b->addr = packet->buf;
- b->desc = BDT_DESC(packet->len, ((uint32_t)b & 8) ? DATA1 : DATA0);
- __enable_irq();
- }
-
- void usb_tx_isochronous(uint32_t endpoint, void *data, uint32_t len)
- {
- bdt_t *b = &table[index(endpoint, TX, EVEN)];
- uint8_t next, state;
-
- endpoint--;
- if (endpoint >= NUM_ENDPOINTS) return;
- __disable_irq();
- state = tx_state[endpoint];
- if (state == 0) {
- next = 1;
- } else {
- b++;
- next = 0;
- }
- tx_state[endpoint] = next;
- b->addr = data;
- b->desc = (len << 16) | BDT_OWN;
- __enable_irq();
- }
-
-
-
-
- void _reboot_Teensyduino_(void)
- {
-
- __asm__ volatile("bkpt");
- }
-
-
-
- void usb_isr(void)
- {
- uint8_t status, stat, t;
-
-
-
-
-
- restart:
- status = USB0_ISTAT;
-
- if ((status & USB_ISTAT_SOFTOK )) {
- 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
- #ifdef MULTITOUCH_INTERFACE
- usb_touchscreen_update_callback();
- #endif
- }
- USB0_ISTAT = USB_ISTAT_SOFTOK;
- }
-
- if ((status & USB_ISTAT_TOKDNE )) {
- uint8_t endpoint;
- stat = USB0_STAT;
-
-
-
-
- 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--;
-
- #ifdef AUDIO_INTERFACE
- if ((endpoint == AUDIO_TX_ENDPOINT-1) && (stat & 0x08)) {
- unsigned int len;
- len = usb_audio_transmit_callback();
- if (len > 0) {
- b = (bdt_t *)((uint32_t)b ^ 8);
- b->addr = usb_audio_transmit_buffer;
- b->desc = (len << 16) | BDT_OWN;
- tx_state[endpoint] ^= 1;
- }
- } else if ((endpoint == AUDIO_RX_ENDPOINT-1) && !(stat & 0x08)) {
- usb_audio_receive_callback(b->desc >> 16);
- b->addr = usb_audio_receive_buffer;
- b->desc = (AUDIO_RX_SIZE << 16) | BDT_OWN;
- } else if ((endpoint == AUDIO_SYNC_ENDPOINT-1) && (stat & 0x08)) {
- b = (bdt_t *)((uint32_t)b ^ 8);
- b->addr = &usb_audio_sync_feedback;
- b->desc = (3 << 16) | BDT_OWN;
- tx_state[endpoint] ^= 1;
- } else
- #endif
- if (stat & 0x08) {
- usb_free(packet);
- packet = tx_first[endpoint];
- if (packet) {
-
- 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 {
-
- 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 {
- packet->len = b->desc >> 16;
- if (packet->len > 0) {
- packet->index = 0;
- packet->next = NULL;
- if (rx_first[endpoint] == NULL) {
-
-
-
-
-
- rx_first[endpoint] = packet;
- } else {
-
-
-
-
-
- rx_last[endpoint]->next = packet;
- }
- rx_last[endpoint] = packet;
- usb_rx_byte_count_data[endpoint] += packet->len;
-
-
-
-
- packet = usb_malloc();
- if (packet) {
- b->addr = packet->buf;
- b->desc = BDT_DESC(64,
- ((uint32_t)b & 8) ? DATA1 : DATA0);
- } else {
-
-
- 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 ) {
-
-
-
- USB0_CTL = USB_CTL_ODDRST;
- ep0_tx_bdt_bank = 0;
-
-
- 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;
-
-
- USB0_ENDPT0 = USB_ENDPT_EPRXEN | USB_ENDPT_EPTXEN | USB_ENDPT_EPHSHK;
-
-
- USB0_ERRSTAT = 0xFF;
- USB0_ISTAT = 0xFF;
-
-
- USB0_ADDR = 0;
-
-
- USB0_ERREN = 0xFF;
- USB0_INTEN = USB_INTEN_TOKDNEEN |
- USB_INTEN_SOFTOKEN |
- USB_INTEN_STALLEN |
- USB_INTEN_ERROREN |
- USB_INTEN_USBRSTEN |
- USB_INTEN_SLEEPEN;
-
-
- USB0_CTL = USB_CTL_USBENSOFEN;
- return;
- }
-
-
- if ((status & USB_ISTAT_STALL )) {
-
- USB0_ENDPT0 = USB_ENDPT_EPRXEN | USB_ENDPT_EPTXEN | USB_ENDPT_EPHSHK;
- USB0_ISTAT = USB_ISTAT_STALL;
- }
- if ((status & USB_ISTAT_ERROR )) {
- uint8_t err = USB0_ERRSTAT;
- USB0_ERRSTAT = err;
-
-
-
- USB0_ISTAT = USB_ISTAT_ERROR;
- }
-
- if ((status & USB_ISTAT_SLEEP )) {
-
- USB0_ISTAT = USB_ISTAT_SLEEP;
- }
-
- }
-
-
-
- void usb_init(void)
- {
- int i;
-
-
-
-
- usb_init_serialnumber();
-
- for (i=0; i <= NUM_ENDPOINTS*4; i++) {
- table[i].desc = 0;
- table[i].addr = 0;
- }
-
-
-
-
-
-
- SIM_SCGC4 |= SIM_SCGC4_USBOTG;
- #ifdef HAS_KINETIS_MPU
- MPU_RGDAAC0 |= 0x03000000;
- #endif
- #if F_CPU == 180000000 || F_CPU == 216000000 || F_CPU == 256000000
-
- USB0_CLK_RECOVER_IRC_EN = USB_CLK_RECOVER_IRC_EN_IRC_EN | USB_CLK_RECOVER_IRC_EN_REG_EN;
- USB0_CLK_RECOVER_CTRL = USB_CLK_RECOVER_CTRL_CLOCK_RECOVER_EN |
- USB_CLK_RECOVER_CTRL_RESTART_IFRTRIM_EN;
- #endif
-
-
-
-
-
- USB0_BDTPAGE1 = ((uint32_t)table) >> 8;
- USB0_BDTPAGE2 = ((uint32_t)table) >> 16;
- USB0_BDTPAGE3 = ((uint32_t)table) >> 24;
-
-
- USB0_ISTAT = 0xFF;
- USB0_ERRSTAT = 0xFF;
- USB0_OTGISTAT = 0xFF;
-
-
-
-
- USB0_CTL = USB_CTL_USBENSOFEN;
- USB0_USBCTRL = 0;
-
-
- USB0_INTEN = USB_INTEN_USBRSTEN;
-
-
- NVIC_SET_PRIORITY(IRQ_USBOTG, 112);
- NVIC_ENABLE_IRQ(IRQ_USBOTG);
-
-
- USB0_CONTROL = USB_CONTROL_DPPULLUPNONOTG;
- }
-
-
- #else
-
- void usb_init(void)
- {
- }
-
- #endif
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