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Refactor and clean up

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This commit is contained in:
kkitayam 2021-05-29 19:09:13 +09:00
parent c552677a52
commit 1c2e353193
1 changed files with 150 additions and 136 deletions
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286
src/portable/renesas/usba/dcd_usba.c
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@ -122,7 +122,7 @@ typedef union {
typedef struct TU_ATTR_PACKED
{
uintptr_t addr; /* the start address of a transfer data buffer */
void *buf; /* the start address of a transfer data buffer */
uint16_t length; /* the number of bytes in the buffer */
uint16_t remaining; /* the number of bytes remaining in the buffer */
struct {
@ -236,34 +236,27 @@ static volatile uint16_t* ep_addr_to_pipectr(uint8_t rhport, unsigned ep_addr)
return ctr;
}
static unsigned wait_for_pipe_ready(void)
static unsigned edpt0_max_packet_size(void)
{
unsigned ctr;
do {
ctr = USB0.D0FIFOCTR.WORD;
} while (!(ctr & USB_FIFOCTR_FRDY));
return ctr;
return USB0.DCPMAXP.BIT.MXPS;
}
static unsigned select_pipe(unsigned num, unsigned attr)
static unsigned edpt_max_packet_size(unsigned num)
{
USB0.PIPESEL.WORD = num;
return USB0.PIPEMAXP.WORD;
}
static inline void pipe_wait_for_ready(unsigned num)
{
USB0.PIPESEL.WORD = num;
USB0.D0FIFOSEL.WORD = num | attr;
while (USB0.D0FIFOSEL.BIT.CURPIPE != num) ;
return wait_for_pipe_ready();
while (!USB0.D0FIFOCTR.BIT.FRDY) ;
}
/* 1 less than mps bytes were written to FIFO
* 2 no bytes were written to FIFO
* 0 mps bytes were written to FIFO */
static int fifo_write(volatile void *fifo, pipe_state_t* pipe, unsigned mps)
static void pipe_write_packet(void *buf, volatile void *fifo, unsigned len)
{
unsigned rem = pipe->remaining;
if (!rem) return 2;
unsigned len = TU_MIN(rem, mps);
hw_fifo_t *reg = (hw_fifo_t*)fifo;
uintptr_t addr = pipe->addr + pipe->length - rem;
uintptr_t addr = (uintptr_t)buf;
while (len >= 2) {
reg->u16 = *(const uint16_t *)addr;
addr += 2;
@ -273,31 +266,107 @@ static int fifo_write(volatile void *fifo, pipe_state_t* pipe, unsigned mps)
reg->u8 = *(const uint8_t *)addr;
++addr;
}
if (rem < mps) return 1;
return 0;
}
/* 1 less than mps bytes were read from FIFO
* 2 the end of the buffer reached.
* 0 mps bytes were read from FIFO */
static int fifo_read(volatile void *fifo, pipe_state_t* pipe, unsigned mps, size_t len)
static void pipe_read_packet(void *buf, volatile void *fifo, unsigned len)
{
unsigned rem = pipe->remaining;
if (!rem) return 2;
if (rem < len) len = rem;
pipe->remaining = rem - len;
uint8_t *p = (uint8_t*)buf;
uint8_t *reg = (uint8_t*)fifo; /* byte access is always at base register address */
uintptr_t addr = pipe->addr;
unsigned loop = len;
while (loop--) {
*(uint8_t *)addr = *reg;
++addr;
while (len--) *p++ = *reg;
}
static bool pipe0_xfer_in(void)
{
pipe_state_t *pipe = &_dcd.pipe[0];
const unsigned rem = pipe->remaining;
if (!rem) {
pipe->buf = NULL;
return true;
}
pipe->addr = addr;
if (rem < mps) return 1;
if (rem == len) return 2;
return 0;
const unsigned mps = edpt0_max_packet_size();
const unsigned len = TU_MIN(mps, rem);
void *buf = pipe->buf;
if (len) {
pipe_write_packet(buf, &USB0.CFIFO.WORD, len);
pipe->buf = (uint8_t*)buf + len;
}
if (len < mps) USB0.CFIFOCTR.WORD = USB_FIFOCTR_BVAL;
pipe->remaining = rem - len;
return false;
}
static bool pipe0_xfer_out(void)
{
pipe_state_t *pipe = &_dcd.pipe[0];
const unsigned rem = pipe->remaining;
const unsigned mps = edpt0_max_packet_size();
const unsigned vld = USB0.CFIFOCTR.BIT.DTLN;
const unsigned len = TU_MIN(TU_MIN(rem, mps), vld);
void *buf = pipe->buf;
if (len) {
pipe_read_packet(buf, &USB0.CFIFO.WORD, len);
pipe->buf = (uint8_t*)buf + len;
}
if (len < mps) USB0.CFIFOCTR.WORD = USB_FIFOCTR_BCLR;
pipe->remaining = rem - len;
if ((len < mps) || (rem == len)) {
pipe->buf = NULL;
return true;
}
return false;
}
static bool pipe_xfer_in(unsigned num)
{
pipe_state_t *pipe = &_dcd.pipe[num];
const unsigned rem = pipe->remaining;
if (!rem) {
pipe->buf = NULL;
return true;
}
USB0.D0FIFOSEL.WORD = num | USB_FIFOSEL_MBW_16;
const unsigned mps = edpt_max_packet_size(num);
pipe_wait_for_ready(num);
const unsigned len = TU_MIN(rem, mps);
void *buf = pipe->buf;
if (len) {
pipe_write_packet(buf, &USB0.D0FIFO.WORD, len);
pipe->buf = (uint8_t*)buf + len;
}
if (len < mps) USB0.D0FIFOCTR.WORD = USB_FIFOCTR_BVAL;
USB0.D0FIFOSEL.WORD = 0;
while (USB0.D0FIFOSEL.BIT.CURPIPE) ; /* if CURPIPE bits changes, check written value */
pipe->remaining = rem - len;
return false;
}
static bool pipe_xfer_out(unsigned num)
{
pipe_state_t *pipe = &_dcd.pipe[num];
const unsigned rem = pipe->remaining;
USB0.D0FIFOSEL.WORD = num | USB_FIFOSEL_MBW_8;
const unsigned mps = edpt_max_packet_size(num);
pipe_wait_for_ready(num);
const unsigned vld = USB0.D0FIFOCTR.BIT.DTLN;
const unsigned len = TU_MIN(TU_MIN(rem, mps), vld);
void *buf = pipe->buf;
if (len) {
pipe_read_packet(buf, &USB0.D0FIFO.WORD, len);
pipe->buf = (uint8_t*)buf + len;
}
if (len < mps) USB0.D0FIFOCTR.WORD = USB_FIFOCTR_BCLR;
USB0.D0FIFOSEL.WORD = 0;
while (USB0.D0FIFOSEL.BIT.CURPIPE) ; /* if CURPIPE bits changes, check written value */
pipe->remaining = rem - len;
if ((len < mps) || (rem == len)) {
pipe->buf = NULL;
return NULL != buf;
}
return false;
}
static void process_setup_packet(uint8_t rhport)
@ -327,11 +396,10 @@ static void process_status_completion(uint8_t rhport)
dcd_event_xfer_complete(rhport, ep_addr, 0, XFER_RESULT_SUCCESS, true);
}
static bool process_edpt0_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t* buffer, uint16_t total_bytes)
static bool process_pipe0_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t* buffer, uint16_t total_bytes)
{
(void)rhport;
pipe_state_t *pipe = &_dcd.pipe[0];
/* configure fifo direction and access unit settings */
if (ep_addr) { /* IN, 2 bytes */
USB0.CFIFOSEL.WORD = USB_FIFOSEL_TX | USB_FIFOSEL_MBW_16 | (TU_BYTE_ORDER == TU_BIG_ENDIAN ? USB_FIFOSEL_BIGEND : 0);
@ -340,57 +408,25 @@ static bool process_edpt0_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t* buffer,
USB0.CFIFOSEL.WORD = USB_FIFOSEL_MBW_8;
while (USB0.CFIFOSEL.WORD & USB_FIFOSEL_TX) ;
}
pipe_state_t *pipe = &_dcd.pipe[0];
pipe->length = total_bytes;
pipe->remaining = total_bytes;
if (total_bytes) {
pipe->addr = (uintptr_t)buffer;
pipe->length = total_bytes;
pipe->remaining = total_bytes;
pipe->buf = buffer;
if (ep_addr) { /* IN */
TU_ASSERT(USB0.DCPCTR.BIT.BSTS && (USB0.USBREQ.WORD & 0x80));
if (fifo_write((void*)&USB0.CFIFO.WORD, pipe, 64)) {
USB0.CFIFOCTR.WORD = USB_FIFOCTR_BVAL;
}
pipe0_xfer_in();
}
USB0.DCPCTR.WORD = USB_PIPECTR_PID_BUF;
} else {
/* ZLP */
pipe->addr = 0;
pipe->length = 0;
pipe->remaining = 0;
pipe->buf = NULL;
USB0.DCPCTR.WORD = USB_PIPECTR_CCPL | USB_PIPECTR_PID_BUF;
}
return true;
}
static void process_edpt0_bemp(uint8_t rhport)
{
pipe_state_t *pipe = &_dcd.pipe[0];
const unsigned rem = pipe->remaining;
if (rem > 64) {
pipe->remaining = rem - 64;
int r = fifo_write((void*)&USB0.CFIFO.WORD, &_dcd.pipe[0], 64);
if (r) USB0.CFIFOCTR.WORD = USB_FIFOCTR_BVAL;
return;
}
pipe->addr = 0;
pipe->remaining = 0;
dcd_event_xfer_complete(rhport, tu_edpt_addr(0, TUSB_DIR_IN),
pipe->length, XFER_RESULT_SUCCESS, true);
}
static void process_edpt0_brdy(uint8_t rhport)
{
size_t len = USB0.CFIFOCTR.BIT.DTLN;
int cplt = fifo_read((void*)&USB0.CFIFO.WORD, &_dcd.pipe[0], 64, len);
if (cplt || (len < 64)) {
if (2 != cplt) {
USB0.CFIFOCTR.WORD = USB_FIFOCTR_BCLR;
}
dcd_event_xfer_complete(rhport, tu_edpt_addr(0, TUSB_DIR_OUT),
_dcd.pipe[0].length - _dcd.pipe[0].remaining,
XFER_RESULT_SUCCESS, true);
}
}
static bool process_pipe_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t* buffer, uint16_t total_bytes)
{
(void)rhport;
@ -401,23 +437,16 @@ static bool process_pipe_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t* buffer,
TU_ASSERT(num);
pipe_state_t *pipe = &_dcd.pipe[num];
pipe->addr = (uintptr_t)buffer;
pipe_state_t *pipe = &_dcd.pipe[num];
pipe->buf = buffer;
pipe->length = total_bytes;
pipe->remaining = total_bytes;
USB0.PIPESEL.WORD = num;
const unsigned mps = USB0.PIPEMAXP.WORD;
if (dir) { /* IN */
USB0.D0FIFOSEL.WORD = num | USB_FIFOSEL_MBW_16 | (TU_BYTE_ORDER == TU_BIG_ENDIAN ? USB_FIFOSEL_BIGEND : 0);
while (USB0.D0FIFOSEL.BIT.CURPIPE != num) ;
int r = fifo_write((void*)&USB0.D0FIFO.WORD, pipe, mps);
if (r) USB0.D0FIFOCTR.WORD = USB_FIFOCTR_BVAL;
USB0.D0FIFOSEL.WORD = 0;
while (USB0.D0FIFOSEL.BIT.CURPIPE) ; /* if CURPIPE bits changes, check written value */
pipe_xfer_in(num);
} else {
volatile reg_pipetre_t *pt = get_pipetre(num);
if (pt) {
const unsigned mps = edpt_max_packet_size(num);
volatile uint16_t *ctr = get_pipectr(num);
if (*ctr & 0x3) *ctr = USB_PIPECTR_PID_NAK;
pt->TRE = TU_BIT(8);
@ -430,47 +459,36 @@ static bool process_pipe_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t* buffer,
return true;
}
static void process_pipe0_bemp(uint8_t rhport)
{
bool completed = pipe0_xfer_in();
if (completed) {
pipe_state_t *pipe = &_dcd.pipe[0];
dcd_event_xfer_complete(rhport, tu_edpt_addr(0, TUSB_DIR_IN),
pipe->length, XFER_RESULT_SUCCESS, true);
}
}
static void process_pipe_brdy(uint8_t rhport, unsigned num)
{
pipe_state_t *pipe = &_dcd.pipe[num];
if (tu_edpt_dir(pipe->ep)) { /* IN */
select_pipe(num, USB_FIFOSEL_MBW_16 | (TU_BYTE_ORDER == TU_BIG_ENDIAN ? USB_FIFOSEL_BIGEND : 0));
const unsigned mps = USB0.PIPEMAXP.WORD;
unsigned rem = pipe->remaining;
rem -= TU_MIN(rem, mps);
pipe->remaining = rem;
if (rem) {
int r = 0;
r = fifo_write((void*)&USB0.D0FIFO.WORD, pipe, mps);
if (r) USB0.D0FIFOCTR.WORD = USB_FIFOCTR_BVAL;
USB0.D0FIFOSEL.WORD = 0;
while (USB0.D0FIFOSEL.BIT.CURPIPE) ; /* if CURPIPE bits changes, check written value */
return;
}
USB0.D0FIFOSEL.WORD = 0;
while (USB0.D0FIFOSEL.BIT.CURPIPE) ; /* if CURPIPE bits changes, check written value */
pipe->addr = 0;
pipe->remaining = 0;
dcd_event_xfer_complete(rhport, pipe->ep, pipe->length,
XFER_RESULT_SUCCESS, true);
pipe_state_t *pipe = &_dcd.pipe[num];
const unsigned dir = tu_edpt_dir(pipe->ep);
bool completed;
if (dir) { /* IN */
completed = pipe_xfer_in(num);
} else {
const unsigned ctr = select_pipe(num, USB_FIFOSEL_MBW_8);
const unsigned len = ctr & USB_FIFOCTR_DTLN;
const unsigned mps = USB0.PIPEMAXP.WORD;
int cplt = fifo_read((void*)&USB0.D0FIFO.WORD, pipe, mps, len);
if (cplt || (len < mps)) {
if (2 != cplt) {
USB0.D0FIFO.WORD = USB_FIFOCTR_BCLR;
}
USB0.D0FIFOSEL.WORD = 0;
while (USB0.D0FIFOSEL.BIT.CURPIPE) ; /* if CURPIPE bits changes, check written value */
dcd_event_xfer_complete(rhport, pipe->ep,
pipe->length - pipe->remaining,
XFER_RESULT_SUCCESS, true);
return;
if (num) {
completed = pipe_xfer_out(num);
} else {
completed = pipe0_xfer_out();
}
USB0.D0FIFOSEL.WORD = 0;
while (USB0.D0FIFOSEL.BIT.CURPIPE) ; /* if CURPIPE bits changes, check written value */
}
if (completed) {
dcd_event_xfer_complete(rhport, pipe->ep,
pipe->length - pipe->remaining,
XFER_RESULT_SUCCESS, true);
// TU_LOG1("C %d %d\r\n", num, pipe->length - pipe->remaining);
}
}
@ -649,7 +667,7 @@ bool dcd_edpt_open(uint8_t rhport, tusb_desc_endpoint_t const * ep_desc)
if (dir || (xfer != TUSB_XFER_BULK)) {
*ctr = USB_PIPECTR_PID_BUF;
}
// TU_LOG1("O %d %x %x\r\n", USB0.PIPESEL.WORD, USB0.PIPECFG.WORD, USB0.PIPEMAXP.WORD);
// TU_LOG1("O %d %x %x\r\n", USB0.PIPESEL.WORD, USB0.PIPECFG.WORD, USB0.PIPEMAXP.WORD);
dcd_int_enable(rhport);
return true;
@ -677,7 +695,7 @@ bool dcd_edpt_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t* buffer, uint16_t to
const unsigned epn = tu_edpt_number(ep_addr);
dcd_int_disable(rhport);
if (0 == epn) {
r = process_edpt0_xfer(rhport, ep_addr, buffer, total_bytes);
r = process_pipe0_xfer(rhport, ep_addr, buffer, total_bytes);
} else {
r = process_pipe_xfer(rhport, ep_addr, buffer, total_bytes);
}
@ -779,7 +797,7 @@ void dcd_int_handler(uint8_t rhport)
const unsigned s = USB0.BEMPSTS.WORD;
USB0.BEMPSTS.WORD = 0;
if (s & 1) {
process_edpt0_bemp(rhport);
process_pipe0_bemp(rhport);
}
}
if (is0 & USB_IS0_BRDY) {
@ -787,10 +805,6 @@ void dcd_int_handler(uint8_t rhport)
unsigned s = USB0.BRDYSTS.WORD & m;
/* clear active bits (don't write 0 to already cleared bits according to the HW manual) */
USB0.BRDYSTS.WORD = ~s;
if (s & 1) {
process_edpt0_brdy(rhport);
s &= ~1;
}
while (s) {
#if defined(__CCRX__)
static const int Mod37BitPosition[] = {