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mbed-os/features/unsupported/USBDevice/targets/TARGET_Freescale/USBHAL_KL25Z.cpp

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/* Copyright (c) 2010-2011 mbed.org, MIT License
*
* 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:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* 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.
*/
#if defined(TARGET_KL25Z) | defined(TARGET_KL43Z) | defined(TARGET_KL46Z) | defined(TARGET_K20D50M) | defined(TARGET_K64F) | defined(TARGET_K22F) | defined(TARGET_TEENSY3_1)
#if defined(TARGET_KSDK2_MCUS)
#include "fsl_common.h"
#endif
#include "USBHAL.h"
USBHAL * USBHAL::instance;
static volatile int epComplete = 0;
// Convert physical endpoint number to register bit
#define EP(endpoint) (1<<(endpoint))
// Convert physical to logical
#define PHY_TO_LOG(endpoint) ((endpoint)>>1)
// Get endpoint direction
#define IN_EP(endpoint) ((endpoint) & 1U ? true : false)
#define OUT_EP(endpoint) ((endpoint) & 1U ? false : true)
#define BD_OWN_MASK (1<<7)
#define BD_DATA01_MASK (1<<6)
#define BD_KEEP_MASK (1<<5)
#define BD_NINC_MASK (1<<4)
#define BD_DTS_MASK (1<<3)
#define BD_STALL_MASK (1<<2)
#define TX 1
#define RX 0
#define ODD 0
#define EVEN 1
// this macro waits a physical endpoint number
#define EP_BDT_IDX(ep, dir, odd) (((ep * 4) + (2 * dir) + (1 * odd)))
#define SETUP_TOKEN 0x0D
#define IN_TOKEN 0x09
#define OUT_TOKEN 0x01
#define TOK_PID(idx) ((bdt[idx].info >> 2) & 0x0F)
// for each endpt: 8 bytes
typedef struct BDT {
uint8_t info; // BD[0:7]
uint8_t dummy; // RSVD: BD[8:15]
uint16_t byte_count; // BD[16:32]
uint32_t address; // Addr
} BDT;
// there are:
// * 4 bidirectionnal endpt -> 8 physical endpt
// * as there are ODD and EVEN buffer -> 8*2 bdt
MBED_ALIGN(512) BDT bdt[NUMBER_OF_PHYSICAL_ENDPOINTS * 2]; // 512 bytes aligned!
uint8_t * endpoint_buffer[NUMBER_OF_PHYSICAL_ENDPOINTS * 2];
static uint8_t set_addr = 0;
static uint8_t addr = 0;
static uint32_t Data1 = 0x55555555;
static uint32_t frameNumber() {
return((USB0->FRMNUML | (USB0->FRMNUMH << 8)) & 0x07FF);
}
uint32_t USBHAL::endpointReadcore(uint8_t endpoint, uint8_t *buffer) {
return 0;
}
USBHAL::USBHAL(void) {
// Disable IRQ
NVIC_DisableIRQ(USB0_IRQn);
#if (defined(FSL_FEATURE_SOC_MPU_COUNT) && (FSL_FEATURE_SOC_MPU_COUNT > 0U))
MPU->CESR=0;
#endif
// fill in callback array
epCallback[0] = &USBHAL::EP1_OUT_callback;
epCallback[1] = &USBHAL::EP1_IN_callback;
epCallback[2] = &USBHAL::EP2_OUT_callback;
epCallback[3] = &USBHAL::EP2_IN_callback;
epCallback[4] = &USBHAL::EP3_OUT_callback;
epCallback[5] = &USBHAL::EP3_IN_callback;
epCallback[6] = &USBHAL::EP4_OUT_callback;
epCallback[7] = &USBHAL::EP4_IN_callback;
#if defined(TARGET_KL43Z) || defined(TARGET_K22F) || defined(TARGET_K64F)
// enable USBFS clock
CLOCK_EnableUsbfs0Clock(kCLOCK_UsbSrcIrc48M, 48000000U);
#else
// choose usb src as PLL
SIM->SOPT2 &= ~SIM_SOPT2_PLLFLLSEL_MASK;
SIM->SOPT2 |= (SIM_SOPT2_USBSRC_MASK | (1 << SIM_SOPT2_PLLFLLSEL_SHIFT));
// enable OTG clock
SIM->SCGC4 |= SIM_SCGC4_USBOTG_MASK;
#endif
// Attach IRQ
instance = this;
NVIC_SetVector(USB0_IRQn, (uint32_t)&_usbisr);
NVIC_EnableIRQ(USB0_IRQn);
// USB Module Configuration
// Set BDT Base Register
USB0->BDTPAGE1 = (uint8_t)((uint32_t)bdt>>8);
USB0->BDTPAGE2 = (uint8_t)((uint32_t)bdt>>16);
USB0->BDTPAGE3 = (uint8_t)((uint32_t)bdt>>24);
// Clear interrupt flag
USB0->ISTAT = 0xff;
// USB Interrupt Enablers
USB0->INTEN |= USB_INTEN_TOKDNEEN_MASK |
USB_INTEN_SOFTOKEN_MASK |
USB_INTEN_ERROREN_MASK |
USB_INTEN_USBRSTEN_MASK;
// Disable weak pull downs
USB0->USBCTRL &= ~(USB_USBCTRL_PDE_MASK | USB_USBCTRL_SUSP_MASK);
USB0->USBTRC0 |= 0x40;
/* Allocate control endpoint buffers */
endpoint_buffer[EP_BDT_IDX(0, TX, ODD)] = (uint8_t *)malloc(MAX_PACKET_SIZE_EP0);
endpoint_buffer[EP_BDT_IDX(0, RX, ODD)] = (uint8_t *)malloc(MAX_PACKET_SIZE_EP0);
}
USBHAL::~USBHAL(void) { }
void USBHAL::connect(void) {
// enable USB
USB0->CTL |= USB_CTL_USBENSOFEN_MASK;
// Pull up enable
USB0->CONTROL |= USB_CONTROL_DPPULLUPNONOTG_MASK;
// Allocate endpoint buffers; do allocate control endpoint buffers
for (int i = 4; i < (NUMBER_OF_PHYSICAL_ENDPOINTS * 2); i++) {
if ((i == EPISO_OUT) || (i == EPISO_IN)) {
endpoint_buffer[i] = (uint8_t *)malloc(MAX_PACKET_SIZE_EPISO);
} else {
endpoint_buffer[i] = (uint8_t *)malloc(MAX_PACKET_SIZE_EPBULK);
}
}
}
void USBHAL::disconnect(void) {
// disable USB
USB0->CTL &= ~USB_CTL_USBENSOFEN_MASK;
// Pull up disable
USB0->CONTROL &= ~USB_CONTROL_DPPULLUPNONOTG_MASK;
//Free buffers if required; do not free the control endpoint buffers
for (int i = 4; i < (NUMBER_OF_PHYSICAL_ENDPOINTS * 2); i++) {
free(endpoint_buffer[i]);
endpoint_buffer[i] = NULL;
}
}
void USBHAL::configureDevice(void) {
// not needed
}
void USBHAL::unconfigureDevice(void) {
// not needed
}
void USBHAL::setAddress(uint8_t address) {
// we don't set the address now otherwise the usb controller does not ack
// we set a flag instead
// see usbisr when an IN token is received
set_addr = 1;
addr = address;
}
bool USBHAL::realiseEndpoint(uint8_t endpoint, uint32_t maxPacket, uint32_t flags) {
uint32_t handshake_flag = 0;
uint8_t * buf;
if (endpoint > NUMBER_OF_PHYSICAL_ENDPOINTS - 1) {
return false;
}
uint32_t log_endpoint = PHY_TO_LOG(endpoint);
if ((flags & ISOCHRONOUS) == 0) {
handshake_flag = USB_ENDPT_EPHSHK_MASK;
}
if (IN_EP(endpoint)) {
buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)][0];
} else {
buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)][0];
}
// IN endpt -> device to host (TX)
if (IN_EP(endpoint)) {
USB0->ENDPOINT[log_endpoint].ENDPT |= handshake_flag | // ep handshaking (not if iso endpoint)
USB_ENDPT_EPTXEN_MASK; // en TX (IN) tran
bdt[EP_BDT_IDX(log_endpoint, TX, ODD )].address = (uint32_t) buf;
bdt[EP_BDT_IDX(log_endpoint, TX, EVEN)].address = 0;
}
// OUT endpt -> host to device (RX)
else {
USB0->ENDPOINT[log_endpoint].ENDPT |= handshake_flag | // ep handshaking (not if iso endpoint)
USB_ENDPT_EPRXEN_MASK; // en RX (OUT) tran.
bdt[EP_BDT_IDX(log_endpoint, RX, ODD )].byte_count = maxPacket;
bdt[EP_BDT_IDX(log_endpoint, RX, ODD )].address = (uint32_t) buf;
bdt[EP_BDT_IDX(log_endpoint, RX, ODD )].info = BD_OWN_MASK | BD_DTS_MASK;
bdt[EP_BDT_IDX(log_endpoint, RX, EVEN)].info = 0;
}
Data1 |= (1 << endpoint);
return true;
}
// read setup packet
void USBHAL::EP0setup(uint8_t *buffer) {
uint32_t sz;
endpointReadResult(EP0OUT, buffer, &sz);
}
void USBHAL::EP0readStage(void) {
Data1 &= ~1UL; // set DATA0
bdt[0].info = (BD_DTS_MASK | BD_OWN_MASK);
}
void USBHAL::EP0read(void) {
uint32_t idx = EP_BDT_IDX(PHY_TO_LOG(EP0OUT), RX, 0);
bdt[idx].byte_count = MAX_PACKET_SIZE_EP0;
}
uint32_t USBHAL::EP0getReadResult(uint8_t *buffer) {
uint32_t sz;
endpointReadResult(EP0OUT, buffer, &sz);
return sz;
}
void USBHAL::EP0write(uint8_t *buffer, uint32_t size) {
endpointWrite(EP0IN, buffer, size);
}
void USBHAL::EP0getWriteResult(void) {
}
void USBHAL::EP0stall(void) {
stallEndpoint(EP0OUT);
}
EP_STATUS USBHAL::endpointRead(uint8_t endpoint, uint32_t maximumSize) {
endpoint = PHY_TO_LOG(endpoint);
uint32_t idx = EP_BDT_IDX(endpoint, RX, 0);
bdt[idx].byte_count = maximumSize;
return EP_PENDING;
}
EP_STATUS USBHAL::endpointReadResult(uint8_t endpoint, uint8_t * buffer, uint32_t *bytesRead) {
uint32_t n, sz, idx, setup = 0;
uint8_t not_iso;
uint8_t * ep_buf;
uint32_t log_endpoint = PHY_TO_LOG(endpoint);
if (endpoint > NUMBER_OF_PHYSICAL_ENDPOINTS - 1) {
return EP_INVALID;
}
// if read on a IN endpoint -> error
if (IN_EP(endpoint)) {
return EP_INVALID;
}
idx = EP_BDT_IDX(log_endpoint, RX, 0);
sz = bdt[idx].byte_count;
not_iso = USB0->ENDPOINT[log_endpoint].ENDPT & USB_ENDPT_EPHSHK_MASK;
//for isochronous endpoint, we don't wait an interrupt
if ((log_endpoint != 0) && not_iso && !(epComplete & EP(endpoint))) {
return EP_PENDING;
}
if ((log_endpoint == 0) && (TOK_PID(idx) == SETUP_TOKEN)) {
setup = 1;
}
ep_buf = endpoint_buffer[idx];
for (n = 0; n < sz; n++) {
buffer[n] = ep_buf[n];
}
if (((Data1 >> endpoint) & 1) == ((bdt[idx].info >> 6) & 1)) {
if (setup && (buffer[6] == 0)) // if no setup data stage,
Data1 &= ~1UL; // set DATA0
else
Data1 ^= (1 << endpoint);
}
if (((Data1 >> endpoint) & 1)) {
bdt[idx].info = BD_DTS_MASK | BD_DATA01_MASK | BD_OWN_MASK;
}
else {
bdt[idx].info = BD_DTS_MASK | BD_OWN_MASK;
}
USB0->CTL &= ~USB_CTL_TXSUSPENDTOKENBUSY_MASK;
*bytesRead = sz;
epComplete &= ~EP(endpoint);
return EP_COMPLETED;
}
EP_STATUS USBHAL::endpointWrite(uint8_t endpoint, uint8_t *data, uint32_t size) {
uint32_t idx, n;
uint8_t * ep_buf;
if (endpoint > NUMBER_OF_PHYSICAL_ENDPOINTS - 1) {
return EP_INVALID;
}
// if write on a OUT endpoint -> error
if (OUT_EP(endpoint)) {
return EP_INVALID;
}
idx = EP_BDT_IDX(PHY_TO_LOG(endpoint), TX, 0);
bdt[idx].byte_count = size;
ep_buf = endpoint_buffer[idx];
for (n = 0; n < size; n++) {
ep_buf[n] = data[n];
}
if ((Data1 >> endpoint) & 1) {
bdt[idx].info = BD_OWN_MASK | BD_DTS_MASK;
} else {
bdt[idx].info = BD_OWN_MASK | BD_DTS_MASK | BD_DATA01_MASK;
}
Data1 ^= (1 << endpoint);
return EP_PENDING;
}
EP_STATUS USBHAL::endpointWriteResult(uint8_t endpoint) {
if (epComplete & EP(endpoint)) {
epComplete &= ~EP(endpoint);
return EP_COMPLETED;
}
return EP_PENDING;
}
void USBHAL::stallEndpoint(uint8_t endpoint) {
USB0->ENDPOINT[PHY_TO_LOG(endpoint)].ENDPT |= USB_ENDPT_EPSTALL_MASK;
}
void USBHAL::unstallEndpoint(uint8_t endpoint) {
USB0->ENDPOINT[PHY_TO_LOG(endpoint)].ENDPT &= ~USB_ENDPT_EPSTALL_MASK;
}
bool USBHAL::getEndpointStallState(uint8_t endpoint) {
uint8_t stall = (USB0->ENDPOINT[PHY_TO_LOG(endpoint)].ENDPT & USB_ENDPT_EPSTALL_MASK);
return (stall) ? true : false;
}
void USBHAL::remoteWakeup(void) {
// [TODO]
}
void USBHAL::_usbisr(void) {
instance->usbisr();
}
void USBHAL::usbisr(void) {
uint8_t i;
uint8_t istat = USB0->ISTAT;
// reset interrupt
if (istat & USB_ISTAT_USBRST_MASK) {
// disable all endpt
for(i = 0; i < 16; i++) {
USB0->ENDPOINT[i].ENDPT = 0x00;
}
// enable control endpoint
realiseEndpoint(EP0OUT, MAX_PACKET_SIZE_EP0, 0);
realiseEndpoint(EP0IN, MAX_PACKET_SIZE_EP0, 0);
Data1 = 0x55555555;
USB0->CTL |= USB_CTL_ODDRST_MASK;
USB0->ISTAT = 0xFF; // clear all interrupt status flags
USB0->ERRSTAT = 0xFF; // clear all error flags
USB0->ERREN = 0xFF; // enable error interrupt sources
USB0->ADDR = 0x00; // set default address
// reset bus for USBDevice layer
busReset();
return;
}
// resume interrupt
if (istat & USB_ISTAT_RESUME_MASK) {
USB0->ISTAT = USB_ISTAT_RESUME_MASK;
}
// SOF interrupt
if (istat & USB_ISTAT_SOFTOK_MASK) {
USB0->ISTAT = USB_ISTAT_SOFTOK_MASK;
// SOF event, read frame number
SOF(frameNumber());
}
// stall interrupt
if (istat & 1<<7) {
if (USB0->ENDPOINT[0].ENDPT & USB_ENDPT_EPSTALL_MASK)
USB0->ENDPOINT[0].ENDPT &= ~USB_ENDPT_EPSTALL_MASK;
USB0->ISTAT |= USB_ISTAT_STALL_MASK;
}
// token interrupt
if (istat & 1<<3) {
uint32_t num = (USB0->STAT >> 4) & 0x0F;
uint32_t dir = (USB0->STAT >> 3) & 0x01;
uint32_t ev_odd = (USB0->STAT >> 2) & 0x01;
int endpoint = (num << 1) | dir;
// setup packet
if ((num == 0) && (TOK_PID((EP_BDT_IDX(num, dir, ev_odd))) == SETUP_TOKEN)) {
Data1 &= ~0x02;
bdt[EP_BDT_IDX(0, TX, EVEN)].info &= ~BD_OWN_MASK;
bdt[EP_BDT_IDX(0, TX, ODD)].info &= ~BD_OWN_MASK;
// EP0 SETUP event (SETUP data received)
EP0setupCallback();
} else {
// OUT packet
if (TOK_PID((EP_BDT_IDX(num, dir, ev_odd))) == OUT_TOKEN) {
if (num == 0)
EP0out();
else {
epComplete |= EP(endpoint);
if ((instance->*(epCallback[endpoint - 2]))()) {
epComplete &= ~EP(endpoint);
}
}
}
// IN packet
if (TOK_PID((EP_BDT_IDX(num, dir, ev_odd))) == IN_TOKEN) {
if (num == 0) {
EP0in();
if (set_addr == 1) {
USB0->ADDR = addr & 0x7F;
set_addr = 0;
}
}
else {
epComplete |= EP(endpoint);
if ((instance->*(epCallback[endpoint - 2]))()) {
epComplete &= ~EP(endpoint);
}
}
}
}
USB0->ISTAT = USB_ISTAT_TOKDNE_MASK;
}
// sleep interrupt
if (istat & 1<<4) {
USB0->ISTAT |= USB_ISTAT_SLEEP_MASK;
}
// error interrupt
if (istat & USB_ISTAT_ERROR_MASK) {
USB0->ERRSTAT = 0xFF;
USB0->ISTAT |= USB_ISTAT_ERROR_MASK;
}
}
#endif
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