/* * Copyright © 2012 Keith Packard * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include "ao.h" #include "ao_usb.h" #include "ao_product.h" #ifndef USE_USB_STDIO #define USE_USB_STDIO 1 #endif #if USE_USB_STDIO #define AO_USB_OUT_SLEEP_ADDR (&ao_stdin_ready) #else #define AO_USB_OUT_SLEEP_ADDR (&ao_usb_out_avail) #endif #define USB_DEBUG 0 #define USB_DEBUG_DATA 0 #define USB_ECHO 0 #if USB_DEBUG #define debug(format, args...) printf(format, ## args); #else #define debug(format, args...) #endif #if USB_DEBUG_DATA #define debug_data(format, args...) printf(format, ## args); #else #define debug_data(format, args...) #endif struct ao_usb_setup { uint8_t dir_type_recip; uint8_t request; uint16_t value; uint16_t index; uint16_t length; } ao_usb_setup; static uint8_t ao_usb_ep0_state; /* Pending EP0 IN data */ static const uint8_t *ao_usb_ep0_in_data; /* Remaining data */ static uint8_t ao_usb_ep0_in_len; /* Remaining amount */ static uint16_t ao_usb_ep0_in_max; /* Requested amount from host */ /* Temp buffer for smaller EP0 in data */ static uint8_t ao_usb_ep0_in_buf[2]; /* Pending EP0 OUT data */ static uint8_t *ao_usb_ep0_out_data; static uint8_t ao_usb_ep0_out_len; /* * Objects allocated in special USB memory */ /* USB address of end of allocated storage */ static uint8_t *ao_usb_sram; /* Pointer to ep0 tx/rx buffers in USB memory */ static uint8_t *ao_usb_ep0_tx_buffer; static uint8_t *ao_usb_ep0_setup_buffer; static uint8_t *ao_usb_ep0_rx_buffer; /* Pointer to bulk data tx/rx buffers in USB memory */ static uint8_t *ao_usb_in_tx_buffer; static uint8_t *ao_usb_out_rx_buffer; /* Our data buffers */ static uint8_t ao_usb_tx_buffer[AO_USB_IN_SIZE]; static uint8_t ao_usb_tx_count; static uint8_t ao_usb_rx_buffer[AO_USB_OUT_SIZE]; static uint8_t ao_usb_rx_count, ao_usb_rx_pos; extern struct lpc_usb_endpoint lpc_usb_endpoint; /* Marks when we don't need to send an IN packet. * This happens only when the last IN packet is not full, * otherwise the host will expect to keep seeing packets. * Send a zero-length packet as required */ static uint8_t ao_usb_in_flushed; /* Marks when we have delivered an IN packet to the hardware * and it has not been received yet. ao_sleep on this address * to wait for it to be delivered. */ static uint8_t ao_usb_in_pending; /* Marks when an OUT packet has been received by the hardware * but not pulled to the shadow buffer. */ static uint8_t ao_usb_out_avail; uint8_t ao_usb_running; static uint8_t ao_usb_configuration; #define AO_USB_EP0_GOT_RESET 1 #define AO_USB_EP0_GOT_SETUP 2 #define AO_USB_EP0_GOT_RX_DATA 4 #define AO_USB_EP0_GOT_TX_ACK 8 static uint8_t ao_usb_ep0_receive; static uint8_t ao_usb_address; static uint8_t ao_usb_address_pending; static inline uint32_t set_toggle(uint32_t current_value, uint32_t mask, uint32_t desired_value) { return (current_value ^ desired_value) & mask; } /* * Set current device address and mark the * interface as active */ void ao_usb_set_address(uint8_t address) { debug("ao_usb_set_address %02x\n", address); lpc_usb.devcmdstat = ((address << LPC_USB_DEVCMDSTAT_DEV_ADDR) | (1 << LPC_USB_DEVCMDSTAT_DEV_EN) | (0 << LPC_USB_DEVCMDSTAT_SETUP) | (0 << LPC_USB_DEVCMDSTAT_PLL_ON) | (0 << LPC_USB_DEVCMDSTAT_LPM_SUP) | (0 << LPC_USB_DEVCMDSTAT_INTONNAK_AO) | (0 << LPC_USB_DEVCMDSTAT_INTONNAK_AI) | (0 << LPC_USB_DEVCMDSTAT_INTONNAK_CO) | (0 << LPC_USB_DEVCMDSTAT_INTONNAK_CI) | (1 << LPC_USB_DEVCMDSTAT_DCON) | (0 << LPC_USB_DEVCMDSTAT_DSUS) | (0 << LPC_USB_DEVCMDSTAT_DCON_C) | (0 << LPC_USB_DEVCMDSTAT_DSUS_C) | (0 << LPC_USB_DEVCMDSTAT_DRES_C) | (0 << LPC_USB_DEVCMDSTAT_VBUSDEBOUNCED)); ao_usb_address_pending = 0; } #define TX_DBG 0 #define RX_DBG 0 #if TX_DBG #define _tx_dbg0(msg) _dbg(__LINE__,msg,0) #define _tx_dbg1(msg,value) _dbg(__LINE__,msg,value) #else #define _tx_dbg0(msg) #define _tx_dbg1(msg,value) #endif #if RX_DBG #define _rx_dbg0(msg) _dbg(__LINE__,msg,0) #define _rx_dbg1(msg,value) _dbg(__LINE__,msg,value) #else #define _rx_dbg0(msg) #define _rx_dbg1(msg,value) #endif #if TX_DBG || RX_DBG static void _dbg(int line, char *msg, uint32_t value); #endif /* * Set just endpoint 0, for use during startup */ static uint8_t * ao_usb_alloc_sram(uint16_t size) { uint8_t *addr = ao_usb_sram; ao_usb_sram += (size + 63) & ~63; return addr; } static uint16_t ao_usb_sram_offset(uint8_t *addr) { return (uint16_t) ((intptr_t) addr >> 6); } static void ao_usb_set_ep(vuint32_t *ep, uint8_t *addr, uint16_t nbytes) { *ep = ((ao_usb_sram_offset(addr) << LPC_USB_EP_OFFSET) | (nbytes << LPC_USB_EP_NBYTES) | (0 << LPC_USB_EP_ENDPOINT_ISO) | (0 << LPC_USB_EP_RATE_FEEDBACK) | (0 << LPC_USB_EP_TOGGLE_RESET) | (0 << LPC_USB_EP_STALL) | (0 << LPC_USB_EP_DISABLED) | (1 << LPC_USB_EP_ACTIVE)); } static inline uint16_t ao_usb_ep_count(vuint32_t *ep) { return (*ep >> LPC_USB_EP_NBYTES) & LPC_USB_EP_NBYTES_MASK; } static inline uint8_t ao_usb_ep_stall(vuint32_t *ep) { return (*ep >> LPC_USB_EP_STALL) & 1; } static inline vuint32_t * ao_usb_ep0_out(void) { return &lpc_usb_endpoint.ep0_out; } static inline vuint32_t * ao_usb_ep0_in(void) { return &lpc_usb_endpoint.ep0_in; } static inline vuint32_t * ao_usb_epn_out(uint8_t n) { return &lpc_usb_endpoint.epn[n-1].out[0]; } static inline vuint32_t * ao_usb_epn_in(uint8_t n) { return &lpc_usb_endpoint.epn[n-1].in[0]; } #if UNUSED static void ao_usb_set_epn_in(uint8_t n, uint8_t *addr, uint16_t nbytes) { ao_usb_set_ep(ao_usb_epn_in(n), addr, nbytes); } #endif static void ao_usb_set_epn_out(uint8_t n, uint8_t *addr, uint16_t nbytes) { ao_usb_set_ep(ao_usb_epn_out(n), addr, nbytes); } static inline uint16_t ao_usb_epn_out_count(uint8_t n) { return ao_usb_ep_count(ao_usb_epn_out(n)); } static inline uint16_t ao_usb_epn_in_count(uint8_t n) { return ao_usb_ep_count(ao_usb_epn_in(n)); } static uint8_t * ao_usb_enable_ep(vuint32_t *ep, uint16_t nbytes, uint16_t set_nbytes) { uint8_t *addr = ao_usb_alloc_sram(nbytes); ao_usb_set_ep(ep, addr, set_nbytes); return addr; } static void ao_usb_disable_ep(vuint32_t *ep) { *ep = ((0 << LPC_USB_EP_OFFSET) | (0 << LPC_USB_EP_NBYTES) | (0 << LPC_USB_EP_ENDPOINT_ISO) | (0 << LPC_USB_EP_RATE_FEEDBACK) | (0 << LPC_USB_EP_TOGGLE_RESET) | (0 << LPC_USB_EP_STALL) | (1 << LPC_USB_EP_DISABLED) | (0 << LPC_USB_EP_ACTIVE)); } static void ao_usb_enable_epn(uint8_t n, uint16_t out_bytes, uint8_t **out_addr, uint16_t in_bytes, uint8_t **in_addr) { uint8_t *addr; addr = ao_usb_enable_ep(ao_usb_epn_out(n), out_bytes, out_bytes); if (out_addr) *out_addr = addr; ao_usb_disable_ep(&lpc_usb_endpoint.epn[n-1].out[1]); addr = ao_usb_enable_ep(ao_usb_epn_in(n), in_bytes, 0); if (in_addr) *in_addr = addr; ao_usb_disable_ep(&lpc_usb_endpoint.epn[n-1].in[1]); } static void ao_usb_disable_epn(uint8_t n) { ao_usb_disable_ep(ao_usb_epn_out(n)); ao_usb_disable_ep(&lpc_usb_endpoint.epn[n-1].out[1]); ao_usb_disable_ep(ao_usb_epn_in(n)); ao_usb_disable_ep(&lpc_usb_endpoint.epn[n-1].in[1]); } static void ao_usb_reset(void) { ao_usb_set_address(0); ao_usb_configuration = 0; } static void ao_usb_set_ep0(void) { int e; /* Everything is single buffered for now */ lpc_usb.epbufcfg = 0; lpc_usb.epinuse = 0; lpc_usb.epskip = 0xffffffff; lpc_usb.intstat = 0xc00003ff; ao_usb_sram = lpc_usb_sram; lpc_usb.epliststart = (uint32_t) (intptr_t) &lpc_usb_endpoint; lpc_usb.databufstart = ((uint32_t) (intptr_t) ao_usb_sram) & 0xffc00000; /* Set up EP 0 - a Control end point with 32 bytes of in and out buffers */ ao_usb_ep0_rx_buffer = ao_usb_enable_ep(ao_usb_ep0_out(), AO_USB_CONTROL_SIZE, AO_USB_CONTROL_SIZE); ao_usb_ep0_setup_buffer = ao_usb_alloc_sram(AO_USB_CONTROL_SIZE); lpc_usb_endpoint.setup = ao_usb_sram_offset(ao_usb_ep0_setup_buffer); ao_usb_ep0_tx_buffer = ao_usb_enable_ep(ao_usb_ep0_in(), AO_USB_CONTROL_SIZE, 0); /* Clear all of the other endpoints */ for (e = 1; e <= 4; e++) ao_usb_disable_epn(e); ao_usb_reset(); } static void ao_usb_set_configuration(void) { debug ("ao_usb_set_configuration\n"); /* Set up the INT end point */ ao_usb_enable_epn(AO_USB_INT_EP, 0, NULL, 0, NULL); /* Set up the OUT end point */ ao_usb_enable_epn(AO_USB_OUT_EP, AO_USB_OUT_SIZE, &ao_usb_out_rx_buffer, 0, NULL); /* Set up the IN end point */ ao_usb_enable_epn(AO_USB_IN_EP, 0, NULL, AO_USB_IN_SIZE, &ao_usb_in_tx_buffer); ao_usb_running = 1; } /* Send an IN data packet */ static void ao_usb_ep0_flush(void) { uint8_t this_len; this_len = ao_usb_ep0_in_len; if (this_len > AO_USB_CONTROL_SIZE) this_len = AO_USB_CONTROL_SIZE; ao_usb_ep0_in_len -= this_len; ao_usb_ep0_in_max -= this_len; if (this_len < AO_USB_CONTROL_SIZE || ao_usb_ep0_in_max == 0) ao_usb_ep0_state = AO_USB_EP0_IDLE; debug_data ("Flush EP0 len %d:", this_len); memcpy(ao_usb_ep0_tx_buffer, ao_usb_ep0_in_data, this_len); debug_data ("\n"); ao_usb_ep0_in_data += this_len; /* Mark the endpoint as TX valid to send the packet */ ao_usb_set_ep(ao_usb_ep0_in(), ao_usb_ep0_tx_buffer, this_len); debug ("queue tx. 0 now %08x\n", *ao_usb_ep0_in()); } /* Read data from the ep0 OUT fifo */ static void ao_usb_ep0_fill(void) { uint16_t len; uint8_t *rx_buffer; /* Pull all of the data out of the packet */ if (lpc_usb.devcmdstat & (1 << LPC_USB_DEVCMDSTAT_SETUP)) { rx_buffer = ao_usb_ep0_setup_buffer; len = 8; } else { rx_buffer = ao_usb_ep0_rx_buffer; len = AO_USB_CONTROL_SIZE - ao_usb_ep_count(ao_usb_ep0_out()); } if (len > ao_usb_ep0_out_len) len = ao_usb_ep0_out_len; ao_usb_ep0_out_len -= len; debug_data ("Fill EP0 len %d:", len); memcpy(ao_usb_ep0_out_data, rx_buffer, len); debug_data ("\n"); ao_usb_ep0_out_data += len; /* ACK the packet */ ao_usb_set_ep(ao_usb_ep0_out(), ao_usb_ep0_rx_buffer, AO_USB_CONTROL_SIZE); lpc_usb.devcmdstat |= (1 << LPC_USB_DEVCMDSTAT_SETUP); } static void ao_usb_ep0_in_reset(void) { ao_usb_ep0_in_data = ao_usb_ep0_in_buf; ao_usb_ep0_in_len = 0; } static void ao_usb_ep0_in_queue_byte(uint8_t a) { if (ao_usb_ep0_in_len < sizeof (ao_usb_ep0_in_buf)) ao_usb_ep0_in_buf[ao_usb_ep0_in_len++] = a; } static void ao_usb_ep0_in_set(const uint8_t *data, uint8_t len) { ao_usb_ep0_in_data = data; ao_usb_ep0_in_len = len; } static void ao_usb_ep0_out_set(uint8_t *data, uint8_t len) { ao_usb_ep0_out_data = data; ao_usb_ep0_out_len = len; } static void ao_usb_ep0_in_start(uint16_t max) { ao_usb_ep0_in_max = max; /* Don't send more than asked for */ if (ao_usb_ep0_in_len > max) ao_usb_ep0_in_len = max; ao_usb_ep0_flush(); } static struct ao_usb_line_coding ao_usb_line_coding = {115200, 0, 0, 8}; /* Walk through the list of descriptors and find a match */ static void ao_usb_get_descriptor(uint16_t value) { const uint8_t *descriptor; uint8_t type = value >> 8; uint8_t index = value; descriptor = ao_usb_descriptors; while (descriptor[0] != 0) { if (descriptor[1] == type && index-- == 0) { uint8_t len; if (type == AO_USB_DESC_CONFIGURATION) len = descriptor[2]; else len = descriptor[0]; ao_usb_ep0_in_set(descriptor, len); break; } descriptor += descriptor[0]; } } static void ao_usb_ep0_setup(void) { /* Pull the setup packet out of the fifo */ ao_usb_ep0_out_set((uint8_t *) &ao_usb_setup, 8); ao_usb_ep0_fill(); if (ao_usb_ep0_out_len != 0) { debug ("invalid setup packet length\n"); return; } if ((ao_usb_setup.dir_type_recip & AO_USB_DIR_IN) || ao_usb_setup.length == 0) ao_usb_ep0_state = AO_USB_EP0_DATA_IN; else ao_usb_ep0_state = AO_USB_EP0_DATA_OUT; ao_usb_ep0_in_reset(); switch(ao_usb_setup.dir_type_recip & AO_USB_SETUP_TYPE_MASK) { case AO_USB_TYPE_STANDARD: debug ("Standard setup packet\n"); switch(ao_usb_setup.dir_type_recip & AO_USB_SETUP_RECIP_MASK) { case AO_USB_RECIP_DEVICE: debug ("Device setup packet\n"); switch(ao_usb_setup.request) { case AO_USB_REQ_GET_STATUS: debug ("get status\n"); ao_usb_ep0_in_queue_byte(0); ao_usb_ep0_in_queue_byte(0); break; case AO_USB_REQ_SET_ADDRESS: debug ("set address %d\n", ao_usb_setup.value); ao_usb_address = ao_usb_setup.value; ao_usb_address_pending = 1; break; case AO_USB_REQ_GET_DESCRIPTOR: debug ("get descriptor %d\n", ao_usb_setup.value); ao_usb_get_descriptor(ao_usb_setup.value); break; case AO_USB_REQ_GET_CONFIGURATION: debug ("get configuration %d\n", ao_usb_configuration); ao_usb_ep0_in_queue_byte(ao_usb_configuration); break; case AO_USB_REQ_SET_CONFIGURATION: ao_usb_configuration = ao_usb_setup.value; debug ("set configuration %d\n", ao_usb_configuration); ao_usb_set_configuration(); break; } break; case AO_USB_RECIP_INTERFACE: debug ("Interface setup packet\n"); switch(ao_usb_setup.request) { case AO_USB_REQ_GET_STATUS: ao_usb_ep0_in_queue_byte(0); ao_usb_ep0_in_queue_byte(0); break; case AO_USB_REQ_GET_INTERFACE: ao_usb_ep0_in_queue_byte(0); break; case AO_USB_REQ_SET_INTERFACE: break; } break; case AO_USB_RECIP_ENDPOINT: debug ("Endpoint setup packet\n"); switch(ao_usb_setup.request) { case AO_USB_REQ_GET_STATUS: ao_usb_ep0_in_queue_byte(0); ao_usb_ep0_in_queue_byte(0); break; } break; } break; case AO_USB_TYPE_CLASS: debug ("Class setup packet\n"); switch (ao_usb_setup.request) { case AO_USB_SET_LINE_CODING: debug ("set line coding\n"); ao_usb_ep0_out_set((uint8_t *) &ao_usb_line_coding, 7); break; case AO_USB_GET_LINE_CODING: debug ("get line coding\n"); ao_usb_ep0_in_set((const uint8_t *) &ao_usb_line_coding, 7); break; case AO_USB_SET_CONTROL_LINE_STATE: break; } break; } /* If we're not waiting to receive data from the host, * queue an IN response */ if (ao_usb_ep0_state == AO_USB_EP0_DATA_IN) ao_usb_ep0_in_start(ao_usb_setup.length); } static void ao_usb_ep0_handle(uint8_t receive) { ao_usb_ep0_receive = 0; if (receive & AO_USB_EP0_GOT_RESET) { debug ("\treset\n"); ao_usb_reset(); return; } if (receive & AO_USB_EP0_GOT_SETUP) { debug ("\tsetup\n"); ao_usb_ep0_setup(); } if (receive & AO_USB_EP0_GOT_RX_DATA) { debug ("\tgot rx data\n"); if (ao_usb_ep0_state == AO_USB_EP0_DATA_OUT) { ao_usb_ep0_fill(); if (ao_usb_ep0_out_len == 0) { ao_usb_ep0_state = AO_USB_EP0_DATA_IN; ao_usb_ep0_in_start(0); } } } if (receive & AO_USB_EP0_GOT_TX_ACK) { debug ("\tgot tx ack\n"); /* Wait until the IN packet is received from addr 0 * before assigning our local address */ if (ao_usb_address_pending) { #if HAS_FLIGHT /* Go to idle mode if USB is connected */ ao_flight_force_idle = 1; #endif ao_usb_set_address(ao_usb_address); } if (ao_usb_ep0_state == AO_USB_EP0_DATA_IN) ao_usb_ep0_flush(); } } #if USB_DEBUG static uint16_t int_count; static uint16_t in_count; static uint16_t out_count; static uint16_t reset_count; #endif void lpc_usb_irq_isr(void) { uint32_t intstat = lpc_usb.intstat & lpc_usb.inten; lpc_usb.intstat = intstat; /* Handle EP0 OUT packets */ if (intstat & (1 << LPC_USB_INT_EPOUT(0))) { if (lpc_usb.devcmdstat & (1 << LPC_USB_DEVCMDSTAT_SETUP)) ao_usb_ep0_receive |= AO_USB_EP0_GOT_SETUP; else ao_usb_ep0_receive |= AO_USB_EP0_GOT_RX_DATA; ao_usb_ep0_handle(ao_usb_ep0_receive); } /* Handle EP0 IN packets */ if (intstat & (1 << LPC_USB_INT_EPIN(0))) { ao_usb_ep0_receive |= AO_USB_EP0_GOT_TX_ACK; ao_usb_ep0_handle(ao_usb_ep0_receive); } /* Handle OUT packets */ if (intstat & (1 << LPC_USB_INT_EPOUT(AO_USB_OUT_EP))) { #if USB_DEBUG ++out_count; #endif _rx_dbg1("RX ISR", *ao_usb_epn_out(AO_USB_OUT_EP)); ao_usb_out_avail = 1; _rx_dbg0("out avail set"); ao_wakeup(AO_USB_OUT_SLEEP_ADDR) _rx_dbg0("stdin awoken"); } /* Handle IN packets */ if (intstat & (1 << LPC_USB_INT_EPIN(AO_USB_IN_EP))) { #if USB_DEBUG ++in_count; #endif _tx_dbg1("TX ISR", *ao_usb_epn_in(AO_USB_IN_EP)); ao_usb_in_pending = 0; ao_wakeup(&ao_usb_in_pending); } /* NAK all INT EP IN packets */ if (intstat & (1 << LPC_USB_INT_EPIN(AO_USB_INT_EP))) { ; } /* Check for reset */ if (intstat & (1 << LPC_USB_INT_DEV)) { if (lpc_usb.devcmdstat & (1 << LPC_USB_DEVCMDSTAT_DRES_C)) { lpc_usb.devcmdstat |= (1 << LPC_USB_DEVCMDSTAT_DRES_C); ao_usb_ep0_receive |= AO_USB_EP0_GOT_RESET; ao_usb_ep0_handle(ao_usb_ep0_receive); } } } /* Queue the current IN buffer for transmission */ static void _ao_usb_in_send(void) { _tx_dbg0("in_send start"); debug ("send %d\n", ao_usb_tx_count); while (ao_usb_in_pending) ao_sleep(&ao_usb_in_pending); ao_usb_in_pending = 1; if (ao_usb_tx_count != AO_USB_IN_SIZE) ao_usb_in_flushed = 1; memcpy(ao_usb_in_tx_buffer, ao_usb_tx_buffer, ao_usb_tx_count); ao_usb_set_ep(ao_usb_epn_in(AO_USB_IN_EP), ao_usb_in_tx_buffer, ao_usb_tx_count); ao_usb_tx_count = 0; _tx_dbg0("in_send end"); } /* Wait for a free IN buffer. Interrupts are blocked */ static void _ao_usb_in_wait(void) { for (;;) { /* Check if the current buffer is writable */ if (ao_usb_tx_count < AO_USB_IN_SIZE) break; _tx_dbg0("in_wait top"); /* Wait for an IN buffer to be ready */ while (ao_usb_in_pending) ao_sleep(&ao_usb_in_pending); _tx_dbg0("in_wait bottom"); } } void ao_usb_flush(void) { if (!ao_usb_running) return; /* Anytime we've sent a character since * the last time we flushed, we'll need * to send a packet -- the only other time * we would send a packet is when that * packet was full, in which case we now * want to send an empty packet */ ao_arch_block_interrupts(); while (!ao_usb_in_flushed) { _tx_dbg0("flush top"); _ao_usb_in_send(); _tx_dbg0("flush end"); } ao_arch_release_interrupts(); } void ao_usb_putchar(char c) { if (!ao_usb_running) return; ao_arch_block_interrupts(); _ao_usb_in_wait(); ao_usb_in_flushed = 0; ao_usb_tx_buffer[ao_usb_tx_count++] = (uint8_t) c; /* Send the packet when full */ if (ao_usb_tx_count == AO_USB_IN_SIZE) { _tx_dbg0("putchar full"); _ao_usb_in_send(); _tx_dbg0("putchar flushed"); } ao_arch_release_interrupts(); } static void _ao_usb_out_recv(void) { _rx_dbg0("out_recv top"); ao_usb_out_avail = 0; ao_usb_rx_count = AO_USB_OUT_SIZE - ao_usb_epn_out_count(AO_USB_OUT_EP); _rx_dbg1("out_recv count", ao_usb_rx_count); debug ("recv %d\n", ao_usb_rx_count); debug_data("Fill OUT len %d:", ao_usb_rx_count); memcpy(ao_usb_rx_buffer, ao_usb_out_rx_buffer, ao_usb_rx_count); debug_data("\n"); ao_usb_rx_pos = 0; /* ACK the packet */ ao_usb_set_epn_out(AO_USB_OUT_EP, ao_usb_out_rx_buffer, AO_USB_OUT_SIZE); } int _ao_usb_pollchar(void) { uint8_t c; if (!ao_usb_running) return AO_READ_AGAIN; for (;;) { if (ao_usb_rx_pos != ao_usb_rx_count) break; _rx_dbg0("poll check"); /* Check to see if a packet has arrived */ if (!ao_usb_out_avail) { _rx_dbg0("poll none"); return AO_READ_AGAIN; } _ao_usb_out_recv(); } /* Pull a character out of the fifo */ c = ao_usb_rx_buffer[ao_usb_rx_pos++]; return c; } char ao_usb_getchar(void) { int c; ao_arch_block_interrupts(); while ((c = _ao_usb_pollchar()) == AO_READ_AGAIN) ao_sleep(AO_USB_OUT_SLEEP_ADDR); ao_arch_release_interrupts(); return c; } void ao_usb_disable(void) { ao_arch_block_interrupts(); #if HAS_USB_PULLUP ao_gpio_set(AO_USB_PULLUP_PORT, AO_USB_PULLUP_PIN, AO_USB_PULLUP, 0); #endif /* Disable interrupts */ lpc_usb.inten = 0; lpc_nvic_clear_enable(LPC_ISR_USB_IRQ_POS); /* Disable the device */ lpc_usb.devcmdstat = 0; /* Turn off USB clock */ lpc_scb.usbclkdiv = 0; /* Disable USB PHY and PLL */ lpc_scb.pdruncfg |= ((1 << LPC_SCB_PDRUNCFG_USBPAD_PD) | (1 << LPC_SCB_PDRUNCFG_USBPLL_PD)); /* Disable USB registers and RAM */ lpc_scb.sysahbclkctrl &= ~((1 << LPC_SCB_SYSAHBCLKCTRL_USB) | (1 << LPC_SCB_SYSAHBCLKCTRL_USBRAM)); ao_arch_release_interrupts(); } void ao_usb_enable(void) { int t; /* Enable USB pins */ #if HAS_LPC_USB_CONNECT lpc_ioconf.pio0_6 = ((LPC_IOCONF_FUNC_USB_CONNECT << LPC_IOCONF_FUNC) | (LPC_IOCONF_MODE_INACTIVE << LPC_IOCONF_MODE) | (0 << LPC_IOCONF_HYS) | (0 << LPC_IOCONF_INV) | (0 << LPC_IOCONF_OD) | 0x80); #endif #if HAS_USB_VBUS lpc_ioconf.pio0_3 = ((LPC_IOCONF_FUNC_USB_VBUS << LPC_IOCONF_FUNC) | (LPC_IOCONF_MODE_INACTIVE << LPC_IOCONF_MODE) | (0 << LPC_IOCONF_HYS) | (0 << LPC_IOCONF_INV) | (0 << LPC_IOCONF_OD) | 0x80); #endif /* Enable USB registers and RAM */ lpc_scb.sysahbclkctrl |= ((1 << LPC_SCB_SYSAHBCLKCTRL_USB) | (1 << LPC_SCB_SYSAHBCLKCTRL_USBRAM)); /* Enable USB PHY */ lpc_scb.pdruncfg &= ~(1 << LPC_SCB_PDRUNCFG_USBPAD_PD); /* Turn on USB PLL */ lpc_scb.pdruncfg &= ~(1 << LPC_SCB_PDRUNCFG_USBPLL_PD); lpc_scb.usbpllclksel = (LPC_SCB_SYSPLLCLKSEL_SEL_SYSOSC << LPC_SCB_SYSPLLCLKSEL_SEL); lpc_scb.usbpllclkuen = (0 << LPC_SCB_USBPLLCLKUEN_ENA); lpc_scb.usbpllclkuen = (1 << LPC_SCB_USBPLLCLKUEN_ENA); while (!(lpc_scb.usbpllclkuen & (1 << LPC_SCB_USBPLLCLKUEN_ENA))) ; lpc_scb.usbpllctrl = 0x23; while (!(lpc_scb.usbpllstat & 1)) ; lpc_scb.usbclksel = 0; lpc_scb.usbclkuen = (0 << LPC_SCB_USBCLKUEN_ENA); lpc_scb.usbclkuen = (1 << LPC_SCB_USBCLKUEN_ENA); while (!(lpc_scb.usbclkuen & (1 << LPC_SCB_USBCLKUEN_ENA))) ; /* Turn on USB clock, use 48MHz clock unchanged */ lpc_scb.usbclkdiv = 1; /* Configure interrupts */ ao_arch_block_interrupts(); /* Route all interrupts to the main isr */ lpc_usb.introuting = 0; /* Configure NVIC */ lpc_nvic_set_enable(LPC_ISR_USB_IRQ_POS); lpc_nvic_set_priority(LPC_ISR_USB_IRQ_POS, 0); /* Clear any spurious interrupts */ lpc_usb.intstat = 0xffffffff; debug ("ao_usb_enable\n"); /* Enable interrupts */ lpc_usb.inten = ((1 << LPC_USB_INT_EPOUT(0)) | (1 << LPC_USB_INT_EPIN(0)) | (1 << LPC_USB_INT_EPIN(AO_USB_INT_EP)) | (1 << LPC_USB_INT_EPOUT(AO_USB_OUT_EP)) | (1 << LPC_USB_INT_EPIN(AO_USB_IN_EP)) | (1 << LPC_USB_INT_DEV)); ao_arch_release_interrupts(); lpc_usb.devcmdstat = 0; for (t = 0; t < 1000; t++) ao_arch_nop(); ao_usb_set_ep0(); #if HAS_USB_PULLUP ao_gpio_set(AO_USB_PULLUP_PORT, AO_USB_PULLUP_PIN, AO_USB_PULLUP, 1); #endif } #if USB_ECHO struct ao_task ao_usb_echo_task; static void ao_usb_echo(void) { char c; for (;;) { c = ao_usb_getchar(); ao_usb_putchar(c); ao_usb_flush(); } } #endif #if USB_DEBUG static void ao_usb_irq(void) { printf ("control: %d out: %d in: %d int: %d reset: %d\n", control_count, out_count, in_count, int_count, reset_count); } __code struct ao_cmds ao_usb_cmds[] = { { ao_usb_irq, "I\0Show USB interrupt counts" }, { 0, NULL } }; #endif void ao_usb_init(void) { #if HAS_USB_PULLUP ao_enable_output(AO_USB_PULLUP_PORT, AO_USB_PULLUP_PIN, AO_USB_PULLUP, 0); #endif ao_usb_enable(); debug ("ao_usb_init\n"); #if USB_ECHO ao_add_task(&ao_usb_echo_task, ao_usb_echo, "usb echo"); #endif #if USB_DEBUG ao_cmd_register(&ao_usb_cmds[0]); #endif #if USE_USB_STDIO ao_add_stdio(_ao_usb_pollchar, ao_usb_putchar, ao_usb_flush); #endif } #if TX_DBG || RX_DBG struct ao_usb_dbg { int line; char *msg; uint32_t value; uint32_t primask; #if TX_DBG uint16_t in_count; uint32_t in_ep; uint32_t in_pending; uint32_t tx_count; uint32_t in_flushed; #endif #if RX_DBG uint8_t rx_count; uint8_t rx_pos; uint8_t out_avail; uint32_t out_ep; #endif }; #define NUM_USB_DBG 8 static struct ao_usb_dbg dbg[NUM_USB_DBG]; static int dbg_i; static void _dbg(int line, char *msg, uint32_t value) { uint32_t primask; dbg[dbg_i].line = line; dbg[dbg_i].msg = msg; dbg[dbg_i].value = value; asm("mrs %0,primask" : "=&r" (primask)); dbg[dbg_i].primask = primask; #if TX_DBG dbg[dbg_i].in_count = in_count; dbg[dbg_i].in_ep = *ao_usb_epn_in(AO_USB_IN_EP); dbg[dbg_i].in_pending = ao_usb_in_pending; dbg[dbg_i].tx_count = ao_usb_tx_count; dbg[dbg_i].in_flushed = ao_usb_in_flushed; #endif #if RX_DBG dbg[dbg_i].rx_count = ao_usb_rx_count; dbg[dbg_i].rx_pos = ao_usb_rx_pos; dbg[dbg_i].out_avail = ao_usb_out_avail; dbg[dbg_i].out_ep = *ao_usb_epn_out(AO_USB_OUT_EP); #endif if (++dbg_i == NUM_USB_DBG) dbg_i = 0; } #endif