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wrap up lpc11u port

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This commit is contained in:
hathach 2018-12-03 13:15:28 +07:00
parent f28a15a886
commit 66bd9f0a16
1 changed files with 41 additions and 42 deletions
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83
src/portable/nxp/lpc11_13_15/dcd_lpc_11_13_15.c
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@ -54,10 +54,13 @@
// only SRAM1 & USB RAM can be used for transfer
#define SRAM_REGION 0x20000000
// NOTE: despite of being very the same to lpc13uxx controller, lpc11u's controller cannot queue transfer more than
// endpoint's max packet size and need some soft DMA helper
/* Although device controller are the same. DMA of
* - LPC11u can only transfer up to nbytes = 64
* - LPC13 can transfer nbytes = 1023 (maximum)
* - LPC15 can ???
*/
enum {
DCD_11U_13U_MAX_BYTE_PER_TD = (CFG_TUSB_MCU == OPT_MCU_LPC11UXX ? 64 : 1023)
DMA_NBYTES_MAX = (CFG_TUSB_MCU == OPT_MCU_LPC11UXX ? 64 : 1023)
};
enum {
@ -80,7 +83,7 @@ enum {
typedef struct ATTR_PACKED
{
// Bits 21:6 (aligned 64) used in conjunction with bit 31:22 of DATABUFSTART
volatile uint16_t buffer_offset ;
volatile uint16_t buffer_offset;
volatile uint16_t nbytes : 10 ;
uint16_t is_iso : 1 ;
@ -93,21 +96,23 @@ typedef struct ATTR_PACKED
TU_VERIFY_STATIC( sizeof(ep_cmd_sts_t) == 4, "size is not correct" );
typedef struct
{
uint16_t total_bytes;
uint16_t xferred_bytes;
uint16_t nbytes;
}xfer_dma_t;
// NOTE data will be transferred as soon as dcd get request by dcd_pipe(_queue)_xfer using double buffering.
// current_td is used to keep track of number of remaining & xferred bytes of the current request.
typedef struct
{
// 256 byte aligned, 2 for double buffer (not used)
// Each cmd_sts can only transfer up to 1023 bytes each pass
//
// Each cmd_sts can only transfer up to DMA_NBYTES_MAX bytes each
ep_cmd_sts_t ep[EP_COUNT][2];
struct {
uint16_t remaining_bytes; ///< expected bytes of the queued transfer
uint16_t xferred_bytes; ///< xferred bytes of the current transfer
uint16_t nbytes; // Set nbytes, to determine transferred bytes each pass
}current_td[EP_COUNT];
xfer_dma_t dma[EP_COUNT];
ATTR_ALIGNED(64) uint8_t setup_packet[8];
}dcd_data_t;
@ -119,7 +124,7 @@ typedef struct
// EP list must be 256-byte aligned
CFG_TUSB_MEM_SECTION ATTR_ALIGNED(256) static dcd_data_t _dcd;
static inline uint16_t addr_offset(void const * buffer)
static inline uint16_t get_buf_offset(void const * buffer)
{
uint32_t addr = (uint32_t) buffer;
TU_ASSERT( (addr & 0x3f) == 0, 0 );
@ -204,26 +209,23 @@ void dcd_edpt_stall(uint8_t rhport, uint8_t ep_addr)
else
{
uint8_t const ep_id = ep_addr2id(ep_addr);
_dcd.ep[ep_id][0].stall = _dcd.ep[ep_id][1].stall = 1;
_dcd.ep[ep_id][0].stall = 1;
}
}
bool dcd_edpt_stalled(uint8_t rhport, uint8_t ep_addr)
{
uint8_t const ep_id = ep_addr2id(ep_addr);
return _dcd.ep[ep_id][0].stall || _dcd.ep[ep_id][1].stall;
return _dcd.ep[ep_id][0].stall;
}
void dcd_edpt_clear_stall(uint8_t rhport, uint8_t edpt_addr)
{
uint8_t const ep_id = ep_addr2id(edpt_addr);
// uint8_t active_buffer = BIT_TEST_(LPC_USB->EPINUSE, ep_id) ? 1 : 0;
_dcd.ep[ep_id][0].stall = _dcd.ep[ep_id][1].stall = 0;
// since the next transfer always take place on buffer0 --> clear buffer0 toggle
_dcd.ep[ep_id][0].toggle_reset = 1;
_dcd.ep[ep_id][0].toggle_mode = 0;
_dcd.ep[ep_id][0].stall = 0;
_dcd.ep[ep_id][0].toggle_reset = 1;
_dcd.ep[ep_id][0].toggle_mode = 0;
}
bool dcd_edpt_open(uint8_t rhport, tusb_desc_endpoint_t const * p_endpoint_desc)
@ -240,7 +242,7 @@ bool dcd_edpt_open(uint8_t rhport, tusb_desc_endpoint_t const * p_endpoint_desc)
TU_ASSERT( _dcd.ep[ep_id][0].disable && _dcd.ep[ep_id][1].disable );
tu_memclr(_dcd.ep[ep_id], 2*sizeof(ep_cmd_sts_t));
_dcd.ep[ep_id][0].is_iso = _dcd.ep[ep_id][1].is_iso = (p_endpoint_desc->bmAttributes.xfer == TUSB_XFER_ISOCHRONOUS);
_dcd.ep[ep_id][0].is_iso = (p_endpoint_desc->bmAttributes.xfer == TUSB_XFER_ISOCHRONOUS);
// Enable EP interrupt
LPC_USB->INTEN |= BIT_(ep_id);
@ -251,32 +253,28 @@ bool dcd_edpt_open(uint8_t rhport, tusb_desc_endpoint_t const * p_endpoint_desc)
bool dcd_edpt_busy(uint8_t rhport, uint8_t ep_addr)
{
uint8_t const ep_id = ep_addr2id(ep_addr);
return _dcd.ep[ep_id][0].active || _dcd.ep[ep_id][1].active;
return _dcd.ep[ep_id][0].active;
}
static void prepare_ep_xfer(uint8_t ep_id, uint16_t buff_addr_offset, uint16_t total_bytes)
static void prepare_ep_xfer(uint8_t ep_id, uint16_t buf_offset, uint16_t total_bytes)
{
uint16_t const queued_bytes = tu_min16(total_bytes, DCD_11U_13U_MAX_BYTE_PER_TD);
uint16_t const nbytes = tu_min16(total_bytes, DMA_NBYTES_MAX);
_dcd.current_td[ep_id].nbytes = queued_bytes;
_dcd.current_td[ep_id].remaining_bytes -= queued_bytes;
_dcd.ep[ep_id][0].buffer_offset = buff_addr_offset;
_dcd.ep[ep_id][0].nbytes = queued_bytes;
_dcd.dma[ep_id].nbytes = nbytes;
_dcd.ep[ep_id][0].buffer_offset = buf_offset;
_dcd.ep[ep_id][0].nbytes = nbytes;
_dcd.ep[ep_id][0].active = 1;
}
bool dcd_edpt_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t* buffer, uint16_t total_bytes)
{
uint8_t const ep_id = ep_addr2id(ep_addr);
uint16_t buf_offset = addr_offset(buffer);
_dcd.current_td[ep_id].remaining_bytes = total_bytes;
_dcd.current_td[ep_id].xferred_bytes = 0;
_dcd.current_td[ep_id].nbytes = 0;
tu_varclr(&_dcd.dma[ep_id]);
_dcd.dma[ep_id].total_bytes = total_bytes;
prepare_ep_xfer(ep_id, buf_offset, total_bytes);
prepare_ep_xfer(ep_id, get_buf_offset(buffer), total_bytes);
return true;
}
@ -294,7 +292,7 @@ static void bus_reset(void)
_dcd.ep[ep_id][0].disable = _dcd.ep[ep_id][1].disable = 1;
}
_dcd.ep[0][1].buffer_offset = addr_offset(_dcd.setup_packet);
_dcd.ep[0][1].buffer_offset = get_buf_offset(_dcd.setup_packet);
LPC_USB->EPINUSE = 0;
LPC_USB->EPBUFCFG = 0;
@ -312,23 +310,24 @@ static void process_xfer_isr(uint32_t int_status)
if ( BIT_TEST_(int_status, ep_id) )
{
ep_cmd_sts_t * ep_cs = &_dcd.ep[ep_id][0];
xfer_dma_t* xfer_dma = &_dcd.dma[ep_id];
_dcd.current_td[ep_id].xferred_bytes += _dcd.current_td[ep_id].nbytes - ep_cs->nbytes;
xfer_dma->xferred_bytes += xfer_dma->nbytes - ep_cs->nbytes;
if ( (ep_cs->nbytes == 0) && (_dcd.current_td[ep_id].remaining_bytes > 0) )
if ( (ep_cs->nbytes == 0) && (xfer_dma->total_bytes > xfer_dma->xferred_bytes) )
{
// There is more data to transfer
// buff_offset has been already increased by hw to correct value for next transfer
prepare_ep_xfer(ep_id, ep_cs->buffer_offset, _dcd.current_td[ep_id].remaining_bytes);
prepare_ep_xfer(ep_id, ep_cs->buffer_offset, xfer_dma->total_bytes - xfer_dma->xferred_bytes);
}
else
{
_dcd.current_td[ep_id].remaining_bytes = 0;
xfer_dma->total_bytes = xfer_dma->xferred_bytes;
uint8_t const ep_addr = (ep_id / 2) | ((ep_id & 0x01) ? TUSB_DIR_IN_MASK : 0);
// TODO no way determine if the transfer is failed or not
dcd_event_xfer_complete(0, ep_addr, _dcd.current_td[ep_id].xferred_bytes, XFER_RESULT_SUCCESS, true);
dcd_event_xfer_complete(0, ep_addr, xfer_dma->xferred_bytes, XFER_RESULT_SUCCESS, true);
}
}
}
@ -394,7 +393,7 @@ void USB_IRQHandler(void)
dcd_event_setup_received(0, _dcd.setup_packet, true);
// keep waiting for next setup
_dcd.ep[0][1].buffer_offset = addr_offset(_dcd.setup_packet);
_dcd.ep[0][1].buffer_offset = get_buf_offset(_dcd.setup_packet);
// clear bit0
int_status = BIT_CLR_(int_status, 0);