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usb.c
1061 lines (983 loc) · 31.8 KB
/
usb.c
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#include "usb_dev.h"
#define USB_DESC_LIST_DEFINE
#include "usb_desc.h"
#include "usb_serial.h"
#include "usb_seremu.h"
#include "usb_rawhid.h"
#include "usb_keyboard.h"
#include "usb_mouse.h"
#include "usb_joystick.h"
#include "usb_flightsim.h"
#include "usb_touch.h"
#include "usb_midi.h"
#include "usb_audio.h"
#include "usb_mtp.h"
#include "core_pins.h" // for delay()
#include "avr/pgmspace.h"
#include <string.h>
#include "debug/printf.h"
//#define LOG_SIZE 20
//uint32_t transfer_log_head=0;
//uint32_t transfer_log_count=0;
//uint32_t transfer_log[LOG_SIZE];
// device mode, page 3155
#if defined(NUM_ENDPOINTS)
typedef struct endpoint_struct endpoint_t;
struct endpoint_struct {
uint32_t config;
uint32_t current;
uint32_t next;
uint32_t status;
uint32_t pointer0;
uint32_t pointer1;
uint32_t pointer2;
uint32_t pointer3;
uint32_t pointer4;
uint32_t reserved;
uint32_t setup0;
uint32_t setup1;
transfer_t *first_transfer;
transfer_t *last_transfer;
void (*callback_function)(transfer_t *completed_transfer);
uint32_t unused1;
};
/*struct transfer_struct {
uint32_t next;
uint32_t status;
uint32_t pointer0;
uint32_t pointer1;
uint32_t pointer2;
uint32_t pointer3;
uint32_t pointer4;
uint32_t callback_param;
};*/
#ifdef EXPERIMENTAL_INTERFACE
uint8_t experimental_buffer[1152] __attribute__ ((section(".dmabuffers"), aligned(64)));
#endif
endpoint_t endpoint_queue_head[(NUM_ENDPOINTS+1)*2] __attribute__ ((used, aligned(4096), section(".endpoint_queue") ));
transfer_t endpoint0_transfer_data __attribute__ ((used, aligned(32)));
transfer_t endpoint0_transfer_ack __attribute__ ((used, aligned(32)));
typedef 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;
};
uint64_t bothwords;
} setup_t;
static setup_t endpoint0_setupdata;
static uint32_t endpoint0_notify_mask=0;
static uint32_t endpointN_notify_mask=0;
//static int reset_count=0;
volatile uint8_t usb_configuration = 0; // non-zero when USB host as configured device
volatile uint8_t usb_high_speed = 0; // non-zero if running at 480 Mbit/sec speed
static uint8_t endpoint0_buffer[8];
static uint8_t sof_usage = 0;
static uint8_t usb_reboot_timer = 0;
extern uint8_t usb_descriptor_buffer[]; // defined in usb_desc.c
extern const uint8_t usb_config_descriptor_480[];
extern const uint8_t usb_config_descriptor_12[];
void (*usb_timer0_callback)(void) = NULL;
void (*usb_timer1_callback)(void) = NULL;
void usb_isr(void);
static void endpoint0_setup(uint64_t setupdata);
static void endpoint0_transmit(const void *data, uint32_t len, int notify);
static void endpoint0_receive(void *data, uint32_t len, int notify);
static void endpoint0_complete(void);
static void run_callbacks(endpoint_t *ep);
FLASHMEM void usb_init(void)
{
// TODO: only enable when VBUS detected
// TODO: return to low power mode when VBUS removed
// TODO: protect PMU access with MPU
PMU_REG_3P0 = PMU_REG_3P0_OUTPUT_TRG(0x0F) | PMU_REG_3P0_BO_OFFSET(6)
| PMU_REG_3P0_ENABLE_LINREG;
usb_init_serialnumber();
// assume PLL3 is already running - already done by usb_pll_start() in main.c
CCM_CCGR6 |= CCM_CCGR6_USBOH3(CCM_CCGR_ON); // turn on clocks to USB peripheral
printf("BURSTSIZE=%08lX\n", USB1_BURSTSIZE);
//USB1_BURSTSIZE = USB_BURSTSIZE_TXPBURST(4) | USB_BURSTSIZE_RXPBURST(4);
USB1_BURSTSIZE = 0x0404;
printf("BURSTSIZE=%08lX\n", USB1_BURSTSIZE);
printf("USB1_TXFILLTUNING=%08lX\n", USB1_TXFILLTUNING);
// Before programming this register, the PHY clocks must be enabled in registers
// USBPHYx_CTRLn and CCM_ANALOG_USBPHYx_PLL_480_CTRLn.
//printf("USBPHY1_PWD=%08lX\n", USBPHY1_PWD);
//printf("USBPHY1_TX=%08lX\n", USBPHY1_TX);
//printf("USBPHY1_RX=%08lX\n", USBPHY1_RX);
//printf("USBPHY1_CTRL=%08lX\n", USBPHY1_CTRL);
//printf("USB1_USBMODE=%08lX\n", USB1_USBMODE);
// turn on PLL3, wait for 480 MHz lock?
// turn on CCM clock gates? CCGR6[CG0]
#if 1
if ((USBPHY1_PWD & (USBPHY_PWD_RXPWDRX | USBPHY_PWD_RXPWDDIFF | USBPHY_PWD_RXPWD1PT1
| USBPHY_PWD_RXPWDENV | USBPHY_PWD_TXPWDV2I | USBPHY_PWD_TXPWDIBIAS
| USBPHY_PWD_TXPWDFS)) || (USB1_USBMODE & USB_USBMODE_CM_MASK)) {
// USB controller is turned on from previous use
// reset needed to turn it off & start from clean slate
USBPHY1_CTRL_SET = USBPHY_CTRL_SFTRST; // USBPHY1_CTRL page 3292
USB1_USBCMD |= USB_USBCMD_RST; // reset controller
int count=0;
while (USB1_USBCMD & USB_USBCMD_RST) count++;
NVIC_CLEAR_PENDING(IRQ_USB1);
USBPHY1_CTRL_CLR = USBPHY_CTRL_SFTRST; // reset PHY
//USB1_USBSTS = USB1_USBSTS; // TODO: is this needed?
printf("USB reset took %d loops\n", count);
//delay(10);
//printf("\n");
//printf("USBPHY1_PWD=%08lX\n", USBPHY1_PWD);
//printf("USBPHY1_TX=%08lX\n", USBPHY1_TX);
//printf("USBPHY1_RX=%08lX\n", USBPHY1_RX);
//printf("USBPHY1_CTRL=%08lX\n", USBPHY1_CTRL);
//printf("USB1_USBMODE=%08lX\n", USB1_USBMODE);
delay(25);
}
#endif
// Device Controller Initialization, page 2351 (Rev 2, 12/2019)
// USBCMD pg 3216
// USBSTS pg 3220
// USBINTR pg 3224
// DEVICEADDR pg 3227
// ENDPTLISTADDR 3229
// USBMODE pg 3244
// ENDPTSETUPSTAT 3245
// ENDPTPRIME pg 3246
// ENDPTFLUSH pg 3247
// ENDPTSTAT pg 3247
// ENDPTCOMPLETE 3248
// ENDPTCTRL0 pg 3249
USBPHY1_CTRL_CLR = USBPHY_CTRL_CLKGATE;
USBPHY1_PWD = 0;
//printf("USBPHY1_PWD=%08lX\n", USBPHY1_PWD);
//printf("USBPHY1_CTRL=%08lX\n", USBPHY1_CTRL);
USB1_USBMODE = USB_USBMODE_CM(2) | USB_USBMODE_SLOM;
memset(endpoint_queue_head, 0, sizeof(endpoint_queue_head));
endpoint_queue_head[0].config = (64 << 16) | (1 << 15);
endpoint_queue_head[1].config = (64 << 16);
USB1_ENDPOINTLISTADDR = (uint32_t)&endpoint_queue_head;
// Recommended: enable all device interrupts including: USBINT, USBERRINT,
// Port Change Detect, USB Reset Received, DCSuspend.
USB1_USBINTR = USB_USBINTR_UE | USB_USBINTR_UEE | /* USB_USBINTR_PCE | */
USB_USBINTR_URE | USB_USBINTR_SLE;
//_VectorsRam[IRQ_USB1+16] = &usb_isr;
attachInterruptVector(IRQ_USB1, &usb_isr);
NVIC_ENABLE_IRQ(IRQ_USB1);
//printf("USB1_ENDPTCTRL0=%08lX\n", USB1_ENDPTCTRL0);
//printf("USB1_ENDPTCTRL1=%08lX\n", USB1_ENDPTCTRL1);
//printf("USB1_ENDPTCTRL2=%08lX\n", USB1_ENDPTCTRL2);
//printf("USB1_ENDPTCTRL3=%08lX\n", USB1_ENDPTCTRL3);
USB1_USBCMD = USB_USBCMD_RS;
//transfer_log_head = 0;
//transfer_log_count = 0;
//USB1_PORTSC1 |= USB_PORTSC1_PFSC; // force 12 Mbit/sec
}
FLASHMEM void _reboot_Teensyduino_(void)
{
if (!(HW_OCOTP_CFG5 & 0x02)) {
asm("bkpt #251"); // run bootloader
} else {
__disable_irq(); // secure mode NXP ROM reboot
USB1_USBCMD = 0;
IOMUXC_GPR_GPR16 = 0x00200003;
// TODO: wipe all RAM for security
__asm__ volatile("mov sp, %0" : : "r" (0x20201000) : );
__asm__ volatile("dsb":::"memory");
volatile uint32_t * const p = (uint32_t *)0x20208000;
*p = 0xEB120000;
((void (*)(volatile void *))(*(uint32_t *)(*(uint32_t *)0x0020001C + 8)))(p);
}
__builtin_unreachable();
}
void usb_isr(void)
{
//printf("*");
// Port control in device mode is only used for
// status port reset, suspend, and current connect status.
uint32_t status = USB1_USBSTS;
USB1_USBSTS = status;
// USB_USBSTS_SLI - set to 1 when enters a suspend state from an active state
// USB_USBSTS_SRI - set at start of frame
// USB_USBSTS_SRI - set when USB reset detected
if (status & USB_USBSTS_UI) {
//printf("data\n");
uint32_t setupstatus = USB1_ENDPTSETUPSTAT;
//printf("USB1_ENDPTSETUPSTAT=%X\n", setupstatus);
while (setupstatus) {
USB1_ENDPTSETUPSTAT = setupstatus;
setup_t s;
do {
USB1_USBCMD |= USB_USBCMD_SUTW;
s.word1 = endpoint_queue_head[0].setup0;
s.word2 = endpoint_queue_head[0].setup1;
} while (!(USB1_USBCMD & USB_USBCMD_SUTW));
USB1_USBCMD &= ~USB_USBCMD_SUTW;
//printf("setup %08lX %08lX\n", s.word1, s.word2);
USB1_ENDPTFLUSH = (1<<16) | (1<<0); // page 3174
while (USB1_ENDPTFLUSH & ((1<<16) | (1<<0))) ;
endpoint0_notify_mask = 0;
endpoint0_setup(s.bothwords);
setupstatus = USB1_ENDPTSETUPSTAT; // page 3175
}
uint32_t completestatus = USB1_ENDPTCOMPLETE;
if (completestatus) {
USB1_ENDPTCOMPLETE = completestatus;
//printf("USB1_ENDPTCOMPLETE=%lX\n", completestatus);
if (completestatus & endpoint0_notify_mask) {
endpoint0_notify_mask = 0;
endpoint0_complete();
}
completestatus &= endpointN_notify_mask;
#if 1
if (completestatus) {
// transmit:
uint32_t tx = completestatus >> 16;
while (tx) {
int p=__builtin_ctz(tx);
run_callbacks(endpoint_queue_head + p * 2 + 1);
tx &= ~(1<<p);
}
// receive:
uint32_t rx = completestatus & 0xffff;
while(rx) {
int p=__builtin_ctz(rx);
run_callbacks(endpoint_queue_head + p * 2);
rx &= ~(1<<p);
};
}
#else
if (completestatus) {
int i; // TODO: optimize with __builtin_ctz()
for (i=2; i <= NUM_ENDPOINTS; i++) {
if (completestatus & (1 << i)) { // receive
run_callbacks(endpoint_queue_head + i * 2);
}
if (completestatus & (1 << (i + 16))) { // transmit
run_callbacks(endpoint_queue_head + i * 2 + 1);
}
}
}
#endif
}
}
if (status & USB_USBSTS_URI) { // page 3164
USB1_ENDPTSETUPSTAT = USB1_ENDPTSETUPSTAT; // Clear all setup token semaphores
USB1_ENDPTCOMPLETE = USB1_ENDPTCOMPLETE; // Clear all the endpoint complete status
while (USB1_ENDPTPRIME != 0) ; // Wait for any endpoint priming
USB1_ENDPTFLUSH = 0xFFFFFFFF; // Cancel all endpoint primed status
if ((USB1_PORTSC1 & USB_PORTSC1_PR)) {
//printf("reset\n");
} else {
// we took too long to respond :(
// TODO; is this ever really a problem?
//printf("reset too slow\n");
}
#if defined(CDC_STATUS_INTERFACE) && defined(CDC_DATA_INTERFACE)
usb_serial_reset();
#endif
endpointN_notify_mask = 0;
// TODO: Free all allocated dTDs
//if (++reset_count >= 3) {
// shut off USB - easier to see results in protocol analyzer
//USB1_USBCMD &= ~USB_USBCMD_RS;
//printf("shut off USB\n");
//}
}
if (status & USB_USBSTS_TI0) {
if (usb_timer0_callback != NULL) usb_timer0_callback();
}
if (status & USB_USBSTS_TI1) {
if (usb_timer1_callback != NULL) usb_timer1_callback();
}
if (status & USB_USBSTS_PCI) {
if (USB1_PORTSC1 & USB_PORTSC1_HSP) {
//printf("port at 480 Mbit\n");
usb_high_speed = 1;
} else {
//printf("port at 12 Mbit\n");
usb_high_speed = 0;
}
}
if (status & USB_USBSTS_SLI) { // page 3165
//printf("suspend\n");
}
if (status & USB_USBSTS_UEI) {
//printf("error\n");
}
if ((USB1_USBINTR & USB_USBINTR_SRE) && (status & USB_USBSTS_SRI)) {
//printf("sof %d\n", usb_reboot_timer);
if (usb_reboot_timer) {
if (--usb_reboot_timer == 0) {
usb_stop_sof_interrupts(NUM_INTERFACE);
_reboot_Teensyduino_();
}
}
#ifdef MIDI_INTERFACE
usb_midi_flush_output();
#endif
#ifdef MULTITOUCH_INTERFACE
usb_touchscreen_update_callback();
#endif
#ifdef FLIGHTSIM_INTERFACE
usb_flightsim_flush_output();
#endif
}
}
void usb_start_sof_interrupts(int interface)
{
__disable_irq();
sof_usage |= (1 << interface);
uint32_t intr = USB1_USBINTR;
if (!(intr & USB_USBINTR_SRE)) {
USB1_USBSTS = USB_USBSTS_SRI; // clear prior SOF before SOF IRQ enable
USB1_USBINTR = intr | USB_USBINTR_SRE;
}
__enable_irq();
}
void usb_stop_sof_interrupts(int interface)
{
sof_usage &= ~(1 << interface);
if (sof_usage == 0) {
USB1_USBINTR &= ~USB_USBINTR_SRE;
}
}
/*
struct transfer_struct { // table 55-60, pg 3159
uint32_t next;
uint32_t status;
uint32_t pointer0;
uint32_t pointer1;
uint32_t pointer2;
uint32_t pointer3;
uint32_t pointer4;
uint32_t unused1;
};
transfer_t endpoint0_transfer_data __attribute__ ((aligned(32)));;
transfer_t endpoint0_transfer_ack __attribute__ ((aligned(32)));;
*/
static uint8_t reply_buffer[8];
static void endpoint0_setup(uint64_t setupdata)
{
setup_t setup;
uint32_t endpoint, dir, ctrl;
const usb_descriptor_list_t *list;
setup.bothwords = setupdata;
switch (setup.wRequestAndType) {
case 0x0500: // SET_ADDRESS
endpoint0_receive(NULL, 0, 0);
USB1_DEVICEADDR = USB_DEVICEADDR_USBADR(setup.wValue) | USB_DEVICEADDR_USBADRA;
return;
case 0x0900: // SET_CONFIGURATION
usb_configuration = setup.wValue;
// configure all other endpoints
#if defined(ENDPOINT2_CONFIG)
USB1_ENDPTCTRL2 = ENDPOINT2_CONFIG;
#endif
#if defined(ENDPOINT3_CONFIG)
USB1_ENDPTCTRL3 = ENDPOINT3_CONFIG;
#endif
#if defined(ENDPOINT4_CONFIG)
USB1_ENDPTCTRL4 = ENDPOINT4_CONFIG;
#endif
#if defined(ENDPOINT5_CONFIG)
USB1_ENDPTCTRL5 = ENDPOINT5_CONFIG;
#endif
#if defined(ENDPOINT6_CONFIG)
USB1_ENDPTCTRL6 = ENDPOINT6_CONFIG;
#endif
#if defined(ENDPOINT7_CONFIG)
USB1_ENDPTCTRL7 = ENDPOINT7_CONFIG;
#endif
#if defined(CDC_STATUS_INTERFACE) && defined(CDC_DATA_INTERFACE)
usb_serial_configure();
#elif defined(SEREMU_INTERFACE)
usb_seremu_configure();
#endif
#if defined(CDC2_STATUS_INTERFACE) && defined(CDC2_DATA_INTERFACE)
usb_serial2_configure();
#endif
#if defined(CDC3_STATUS_INTERFACE) && defined(CDC3_DATA_INTERFACE)
usb_serial3_configure();
#endif
#if defined(RAWHID_INTERFACE)
usb_rawhid_configure();
#endif
#if defined(KEYBOARD_INTERFACE)
usb_keyboard_configure();
#endif
#if defined(MOUSE_INTERFACE)
usb_mouse_configure();
#endif
#if defined(FLIGHTSIM_INTERFACE)
usb_flightsim_configure();
#endif
#if defined(JOYSTICK_INTERFACE)
usb_joystick_configure();
#endif
#if defined(MULTITOUCH_INTERFACE)
usb_touchscreen_configure();
#endif
#if defined(MIDI_INTERFACE)
usb_midi_configure();
#endif
#if defined(AUDIO_INTERFACE)
usb_audio_configure();
#endif
#if defined(MTP_INTERFACE)
usb_mtp_configure();
#endif
#if defined(EXPERIMENTAL_INTERFACE)
endpoint_queue_head[2].unused1 = (uint32_t)experimental_buffer;
#endif
endpoint0_receive(NULL, 0, 0);
return;
case 0x0880: // GET_CONFIGURATION
reply_buffer[0] = usb_configuration;
endpoint0_transmit(reply_buffer, 1, 0);
return;
case 0x0080: // GET_STATUS (device)
reply_buffer[0] = 0;
reply_buffer[1] = 0;
endpoint0_transmit(reply_buffer, 2, 0);
return;
case 0x0082: // GET_STATUS (endpoint)
endpoint = setup.wIndex & 0x7F;
if (endpoint > 7) break;
dir = setup.wIndex & 0x80;
ctrl = *((uint32_t *)&USB1_ENDPTCTRL0 + endpoint);
reply_buffer[0] = 0;
reply_buffer[1] = 0;
if ((dir && (ctrl & USB_ENDPTCTRL_TXS)) || (!dir && (ctrl & USB_ENDPTCTRL_RXS))) {
reply_buffer[0] = 1;
}
endpoint0_transmit(reply_buffer, 2, 0);
return;
case 0x0302: // SET_FEATURE (endpoint)
endpoint = setup.wIndex & 0x7F;
if (endpoint > 7) break;
dir = setup.wIndex & 0x80;
if (dir) {
*((volatile uint32_t *)&USB1_ENDPTCTRL0 + endpoint) |= USB_ENDPTCTRL_TXS;
} else {
*((volatile uint32_t *)&USB1_ENDPTCTRL0 + endpoint) |= USB_ENDPTCTRL_RXS;
}
endpoint0_receive(NULL, 0, 0);
return;
case 0x0102: // CLEAR_FEATURE (endpoint)
endpoint = setup.wIndex & 0x7F;
if (endpoint > 7) break;
dir = setup.wIndex & 0x80;
if (dir) {
*((volatile uint32_t *)&USB1_ENDPTCTRL0 + endpoint) &= ~USB_ENDPTCTRL_TXS;
} else {
*((volatile uint32_t *)&USB1_ENDPTCTRL0 + endpoint) &= ~USB_ENDPTCTRL_RXS;
}
endpoint0_receive(NULL, 0, 0);
return;
case 0x0680: // GET_DESCRIPTOR
case 0x0681:
for (list = usb_descriptor_list; list->addr != NULL; list++) {
if (setup.wValue == list->wValue && setup.wIndex == list->wIndex) {
uint32_t datalen;
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 (datalen > setup.wLength) datalen = setup.wLength;
// copy the descriptor, from PROGMEM to DMAMEM
if (setup.wValue == 0x200) {
// config descriptor needs to adapt to speed
const uint8_t *src = usb_config_descriptor_12;
if (usb_high_speed) src = usb_config_descriptor_480;
memcpy(usb_descriptor_buffer, src, datalen);
} else if (setup.wValue == 0x700) {
// other speed config also needs to adapt
const uint8_t *src = usb_config_descriptor_480;
if (usb_high_speed) src = usb_config_descriptor_12;
memcpy(usb_descriptor_buffer, src, datalen);
usb_descriptor_buffer[1] = 7;
} else {
memcpy(usb_descriptor_buffer, list->addr, datalen);
}
// prep transmit
arm_dcache_flush_delete(usb_descriptor_buffer, datalen);
endpoint0_transmit(usb_descriptor_buffer, datalen, 0);
return;
}
}
break;
#if defined(CDC_STATUS_INTERFACE)
case 0x2221: // CDC_SET_CONTROL_LINE_STATE
#ifdef CDC_STATUS_INTERFACE
if (setup.wIndex == CDC_STATUS_INTERFACE) {
usb_cdc_line_rtsdtr_millis = systick_millis_count;
usb_cdc_line_rtsdtr = setup.wValue;
}
#endif
#ifdef CDC2_STATUS_INTERFACE
if (setup.wIndex == CDC2_STATUS_INTERFACE) {
usb_cdc2_line_rtsdtr_millis = systick_millis_count;
usb_cdc2_line_rtsdtr = setup.wValue;
}
#endif
#ifdef CDC3_STATUS_INTERFACE
if (setup.wIndex == CDC3_STATUS_INTERFACE) {
usb_cdc3_line_rtsdtr_millis = systick_millis_count;
usb_cdc3_line_rtsdtr = setup.wValue;
}
#endif
// fall through to next case, to always send ZLP ACK
case 0x2321: // CDC_SEND_BREAK
endpoint0_receive(NULL, 0, 0);
return;
case 0x2021: // CDC_SET_LINE_CODING
if (setup.wLength != 7) break;
endpoint0_setupdata.bothwords = setupdata;
endpoint0_receive(endpoint0_buffer, 7, 1);
return;
#endif
#if defined(SEREMU_INTERFACE) || defined(KEYBOARD_INTERFACE)
case 0x0921: // HID SET_REPORT
if (setup.wLength <= sizeof(endpoint0_buffer)) {
//printf("hid set report %x %x\n", setup.word1, setup.word2);
endpoint0_setupdata.bothwords = setup.bothwords;
endpoint0_buffer[0] = 0xE9;
endpoint0_receive(endpoint0_buffer, setup.wLength, 1);
return;
}
break;
#endif
#if defined(AUDIO_INTERFACE)
case 0x0B01: // SET_INTERFACE (alternate setting)
if (setup.wIndex == AUDIO_INTERFACE+1) {
usb_audio_transmit_setting = setup.wValue;
if (usb_audio_transmit_setting > 0) {
// TODO: set up AUDIO_TX_ENDPOINT to transmit
}
endpoint0_receive(NULL, 0, 0);
return;
} else if (setup.wIndex == AUDIO_INTERFACE+2) {
usb_audio_receive_setting = setup.wValue;
endpoint0_receive(NULL, 0, 0);
return;
}
break;
case 0x0A81: // GET_INTERFACE (alternate setting)
if (setup.wIndex == AUDIO_INTERFACE+1) {
endpoint0_buffer[0] = usb_audio_transmit_setting;
endpoint0_transmit(endpoint0_buffer, 1, 0);
return;
} else if (setup.wIndex == AUDIO_INTERFACE+2) {
endpoint0_buffer[0] = usb_audio_receive_setting;
endpoint0_transmit(endpoint0_buffer, 1, 0);
return;
}
break;
case 0x0121: // SET FEATURE
case 0x0221:
case 0x0321:
case 0x0421:
//printf("set_feature, word1=%x, len=%d\n", setup.word1, setup.wLength);
if (setup.wLength <= sizeof(endpoint0_buffer)) {
endpoint0_setupdata.bothwords = setupdata;
endpoint0_receive(endpoint0_buffer, setup.wLength, 1);
return; // handle these after ACK
}
break;
case 0x81A1: // GET FEATURE
case 0x82A1:
case 0x83A1:
case 0x84A1:
if (setup.wLength <= sizeof(endpoint0_buffer)) {
uint32_t len;
if (usb_audio_get_feature(&setup, endpoint0_buffer, &len)) {
//printf("GET feature, len=%d\n", len);
endpoint0_transmit(endpoint0_buffer, len, 0);
return;
}
}
break;
case 0x81A2: // GET_CUR (wValue=0, wIndex=interface, wLength=len)
if (setup.wLength >= 3) {
endpoint0_buffer[0] = 44100 & 255;
endpoint0_buffer[1] = 44100 >> 8;
endpoint0_buffer[2] = 0;
endpoint0_transmit(endpoint0_buffer, 3, 0);
return;
}
break;
#endif
}
USB1_ENDPTCTRL0 = 0x000010001; // stall
}
static void endpoint0_transmit(const void *data, uint32_t len, int notify)
{
//printf("tx %lu\n", len);
if (len > 0) {
// Executing A Transfer Descriptor, page 3182
endpoint0_transfer_data.next = 1;
endpoint0_transfer_data.status = (len << 16) | (1<<7);
uint32_t addr = (uint32_t)data;
endpoint0_transfer_data.pointer0 = addr; // format: table 55-60, pg 3159
endpoint0_transfer_data.pointer1 = addr + 4096;
endpoint0_transfer_data.pointer2 = addr + 8192;
endpoint0_transfer_data.pointer3 = addr + 12288;
endpoint0_transfer_data.pointer4 = addr + 16384;
// Case 1: Link list is empty, page 3182
endpoint_queue_head[1].next = (uint32_t)&endpoint0_transfer_data;
endpoint_queue_head[1].status = 0;
USB1_ENDPTPRIME |= (1<<16);
while (USB1_ENDPTPRIME) ;
}
endpoint0_transfer_ack.next = 1;
endpoint0_transfer_ack.status = (1<<7) | (notify ? (1 << 15) : 0);
endpoint0_transfer_ack.pointer0 = 0;
endpoint_queue_head[0].next = (uint32_t)&endpoint0_transfer_ack;
endpoint_queue_head[0].status = 0;
USB1_ENDPTCOMPLETE = (1<<0) | (1<<16);
USB1_ENDPTPRIME |= (1<<0);
endpoint0_notify_mask = (notify ? (1 << 0) : 0);
while (USB1_ENDPTPRIME) ;
}
static void endpoint0_receive(void *data, uint32_t len, int notify)
{
//printf("rx %lu\n", len);
if (len > 0) {
// Executing A Transfer Descriptor, page 3182
endpoint0_transfer_data.next = 1;
endpoint0_transfer_data.status = (len << 16) | (1<<7);
uint32_t addr = (uint32_t)data;
endpoint0_transfer_data.pointer0 = addr; // format: table 55-60, pg 3159
endpoint0_transfer_data.pointer1 = addr + 4096;
endpoint0_transfer_data.pointer2 = addr + 8192;
endpoint0_transfer_data.pointer3 = addr + 12288;
endpoint0_transfer_data.pointer4 = addr + 16384;
// Case 1: Link list is empty, page 3182
endpoint_queue_head[0].next = (uint32_t)&endpoint0_transfer_data;
endpoint_queue_head[0].status = 0;
USB1_ENDPTPRIME |= (1<<0);
while (USB1_ENDPTPRIME) ;
}
endpoint0_transfer_ack.next = 1;
endpoint0_transfer_ack.status = (1<<7) | (notify ? (1 << 15) : 0);
endpoint0_transfer_ack.pointer0 = 0;
endpoint_queue_head[1].next = (uint32_t)&endpoint0_transfer_ack;
endpoint_queue_head[1].status = 0;
USB1_ENDPTCOMPLETE = (1<<0) | (1<<16);
USB1_ENDPTPRIME |= (1<<16);
endpoint0_notify_mask = (notify ? (1 << 16) : 0);
while (USB1_ENDPTPRIME) ;
}
/*typedef 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;
};
uint64_t bothwords;
} setup_t; */
static void endpoint0_complete(void)
{
setup_t setup;
setup.bothwords = endpoint0_setupdata.bothwords;
//printf("complete %x %x %x\n", setup.word1, setup.word2, endpoint0_buffer[0]);
#ifdef CDC_STATUS_INTERFACE
// 0x2021 is CDC_SET_LINE_CODING
if (setup.wRequestAndType == 0x2021 && setup.wIndex == CDC_STATUS_INTERFACE) {
memcpy(usb_cdc_line_coding, endpoint0_buffer, 7);
printf("usb_cdc_line_coding, baud=%u\n", usb_cdc_line_coding[0]);
if (usb_cdc_line_coding[0] == 134) {
usb_start_sof_interrupts(NUM_INTERFACE);
usb_reboot_timer = 80; // TODO: 10 if only 12 Mbit/sec
}
}
#endif
#ifdef CDC2_STATUS_INTERFACE
if (setup.wRequestAndType == 0x2021 && setup.wIndex == CDC2_STATUS_INTERFACE) {
memcpy(usb_cdc2_line_coding, endpoint0_buffer, 7);
printf("usb_cdc2_line_coding, baud=%u\n", usb_cdc2_line_coding[0]);
if (usb_cdc2_line_coding[0] == 134) {
usb_start_sof_interrupts(NUM_INTERFACE);
usb_reboot_timer = 80; // TODO: 10 if only 12 Mbit/sec
}
}
#endif
#ifdef CDC3_STATUS_INTERFACE
if (setup.wRequestAndType == 0x2021 && setup.wIndex == CDC3_STATUS_INTERFACE) {
memcpy(usb_cdc3_line_coding, endpoint0_buffer, 7);
printf("usb_cdc3_line_coding, baud=%u\n", usb_cdc3_line_coding[0]);
if (usb_cdc3_line_coding[0] == 134) {
usb_start_sof_interrupts(NUM_INTERFACE);
usb_reboot_timer = 80; // TODO: 10 if only 12 Mbit/sec
}
}
#endif
#ifdef KEYBOARD_INTERFACE
if (setup.word1 == 0x02000921 && setup.word2 == ((1 << 16) | KEYBOARD_INTERFACE)) {
keyboard_leds = endpoint0_buffer[0];
endpoint0_transmit(NULL, 0, 0);
}
#endif
#ifdef SEREMU_INTERFACE
if (setup.word1 == 0x03000921 && setup.word2 == ((4<<16)|SEREMU_INTERFACE)) {
if (endpoint0_buffer[0] == 0xA9 && endpoint0_buffer[1] == 0x45
&& endpoint0_buffer[2] == 0xC2 && endpoint0_buffer[3] == 0x6B) {
printf("seremu reboot request\n");
usb_start_sof_interrupts(NUM_INTERFACE);
usb_reboot_timer = 80; // TODO: 10 if only 12 Mbit/sec
} else {
// any other feature report means Arduino Serial Monitor is open
usb_seremu_online = 1;
}
}
#endif
#ifdef AUDIO_INTERFACE
if (setup.word1 == 0x02010121 || setup.word1 == 0x01000121 /* TODO: check setup.word2 */) {
usb_audio_set_feature(&endpoint0_setupdata, endpoint0_buffer);
}
#endif
}
static void usb_endpoint_config(endpoint_t *qh, uint32_t config, void (*callback)(transfer_t *))
{
memset(qh, 0, sizeof(endpoint_t));
qh->config = config;
qh->next = 1; // Terminate bit = 1
qh->callback_function = callback;
}
void usb_config_rx(uint32_t ep, uint32_t packet_size, int do_zlp, void (*cb)(transfer_t *))
{
uint32_t config = (packet_size << 16) | (do_zlp ? 0 : (1 << 29));
if (ep < 2 || ep > NUM_ENDPOINTS) return;
usb_endpoint_config(endpoint_queue_head + ep * 2, config, cb);
if (cb) endpointN_notify_mask |= (1 << ep);
}
void usb_config_tx(uint32_t ep, uint32_t packet_size, int do_zlp, void (*cb)(transfer_t *))
{
uint32_t config = (packet_size << 16) | (do_zlp ? 0 : (1 << 29));
if (ep < 2 || ep > NUM_ENDPOINTS) return;
usb_endpoint_config(endpoint_queue_head + ep * 2 + 1, config, cb);
if (cb) endpointN_notify_mask |= (1 << (ep + 16));
}
void usb_config_rx_iso(uint32_t ep, uint32_t packet_size, int mult, void (*cb)(transfer_t *))
{
if (mult < 1 || mult > 3) return;
uint32_t config = (packet_size << 16) | (mult << 30);
if (ep < 2 || ep > NUM_ENDPOINTS) return;
usb_endpoint_config(endpoint_queue_head + ep * 2, config, cb);
if (cb) endpointN_notify_mask |= (1 << ep);
}
void usb_config_tx_iso(uint32_t ep, uint32_t packet_size, int mult, void (*cb)(transfer_t *))
{
if (mult < 1 || mult > 3) return;
uint32_t config = (packet_size << 16) | (mult << 30);
if (ep < 2 || ep > NUM_ENDPOINTS) return;
usb_endpoint_config(endpoint_queue_head + ep * 2 + 1, config, cb);
if (cb) endpointN_notify_mask |= (1 << (ep + 16));
}
void usb_prepare_transfer(transfer_t *transfer, const void *data, uint32_t len, uint32_t param)
{
transfer->next = 1;
transfer->status = (len << 16) | (1<<7);
uint32_t addr = (uint32_t)data;
transfer->pointer0 = addr;
transfer->pointer1 = addr + 4096;
transfer->pointer2 = addr + 8192;
transfer->pointer3 = addr + 12288;
transfer->pointer4 = addr + 16384;
transfer->callback_param = param;
}
#if 0
void usb_print_transfer_log(void)
{
uint32_t i, count;
printf("log %d transfers\n", transfer_log_count);
count = transfer_log_count;
if (count > LOG_SIZE) count = LOG_SIZE;
for (i=0; i < count; i++) {
if (transfer_log_head == 0) transfer_log_head = LOG_SIZE;
transfer_log_head--;
uint32_t log = transfer_log[transfer_log_head];
printf(" %c %X\n", log >> 8, (int)(log & 255));
}
}
#endif
static void schedule_transfer(endpoint_t *endpoint, uint32_t epmask, transfer_t *transfer)
{
// when we stop at 6, why is the last transfer missing from the USB output?
//if (transfer_log_count >= 6) return;
//uint32_t ret = (*(const uint8_t *)transfer->pointer0) << 8;
if (endpoint->callback_function) {
transfer->status |= (1<<15);
}
__disable_irq();
//digitalWriteFast(1, HIGH);
// Executing A Transfer Descriptor, page 2468 (RT1060 manual, Rev 1, 12/2018)
transfer_t *last = endpoint->last_transfer;
if (last) {
last->next = (uint32_t)transfer;
if (USB1_ENDPTPRIME & epmask) goto end;
//digitalWriteFast(2, HIGH);
//ret |= 0x01;
uint32_t status, cyccnt=ARM_DWT_CYCCNT;
do {
USB1_USBCMD |= USB_USBCMD_ATDTW;
status = USB1_ENDPTSTATUS;
} while (!(USB1_USBCMD & USB_USBCMD_ATDTW) && (ARM_DWT_CYCCNT - cyccnt < 2400));
//USB1_USBCMD &= ~USB_USBCMD_ATDTW;
if (status & epmask) goto end;
//ret |= 0x02;
endpoint->next = (uint32_t)transfer;
endpoint->status = 0;
USB1_ENDPTPRIME |= epmask;
goto end;
}
//digitalWriteFast(4, HIGH);
endpoint->next = (uint32_t)transfer;
endpoint->status = 0;
USB1_ENDPTPRIME |= epmask;
endpoint->first_transfer = transfer;
end:
endpoint->last_transfer = transfer;
__enable_irq();
//digitalWriteFast(4, LOW);
//digitalWriteFast(3, LOW);
//digitalWriteFast(2, LOW);
//digitalWriteFast(1, LOW);
//if (transfer_log_head > LOG_SIZE) transfer_log_head = 0;
//transfer_log[transfer_log_head++] = ret;
//transfer_log_count++;
}
// ENDPTPRIME - Software should write a one to the corresponding bit when
// posting a new transfer descriptor to an endpoint queue head.
// Hardware automatically uses this bit to begin parsing for a
// new transfer descriptor from the queue head and prepare a
// transmit buffer. Hardware clears this bit when the associated
// endpoint(s) is (are) successfully primed.
// Momentarily set by hardware during hardware re-priming
// operations when a dTD is retired, and the dQH is updated.
// ENDPTSTATUS - Transmit Buffer Ready - set to one by the hardware as a
// response to receiving a command from a corresponding bit
// in the ENDPTPRIME register. . Buffer ready is cleared by
// USB reset, by the USB DMA system, or through the ENDPTFLUSH
// register. (so 0=buffer ready, 1=buffer primed for transmit)
// USBCMD.ATDTW - This bit is used as a semaphore to ensure proper addition
// of a new dTD to an active (primed) endpoint's linked list.
// This bit is set and cleared by software.
// This bit would also be cleared by hardware when state machine
// is hazard region for which adding a dTD to a primed endpoint
// may go unrecognized.
/*struct endpoint_struct {
uint32_t config;
uint32_t current;
uint32_t next;
uint32_t status;
uint32_t pointer0;
uint32_t pointer1;
uint32_t pointer2;
uint32_t pointer3;
uint32_t pointer4;
uint32_t reserved;
uint32_t setup0;
uint32_t setup1;
transfer_t *first_transfer;
transfer_t *last_transfer;
void (*callback_function)(transfer_t *completed_transfer);
uint32_t unused1;
};*/
static void run_callbacks(endpoint_t *ep)
{
//printf("run_callbacks\n");
transfer_t *first = ep->first_transfer;
if (first == NULL) return;
// count how many transfers are completed, then remove them from the endpoint's list
uint32_t count = 0;
transfer_t *t = first;
while (1) {
if (t->status & (1<<7)) {
// found a still-active transfer, new list begins here
//printf(" still active\n");
ep->first_transfer = t;
break;
}
count++;
t = (transfer_t *)t->next;
if ((uint32_t)t == 1) {