1180 lines
28 KiB
C
1180 lines
28 KiB
C
/* Teensyduino Core Library
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* http://www.pjrc.com/teensy/
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* Copyright (c) 2013 PJRC.COM, LLC.
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* Modifications by Jacob Alexander (2013-2014)
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* 1. The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* 2. If the Software is incorporated into a build system that allows
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* selection among a list of target devices, then similar target
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* devices manufactured by PJRC.COM must be included in the list of
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* target devices and selectable in the same manner.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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// ----- Includes -----
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// Project Includes
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#include <Lib/OutputLib.h>
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#include <print.h>
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// Local Includes
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#include "usb_dev.h"
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#include "usb_mem.h"
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// ----- Defines -----
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// DEBUG Mode
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// XXX - Only use when using usbMuxUart Module
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// Delay causes issues initializing more than 1 hid device (i.e. NKRO keyboard)
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//#define UART_DEBUG 1
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// Debug Unknown USB requests, usually what you want to debug USB issues
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//#define UART_DEBUG_UNKNOWN 1
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#define TX_STATE_BOTH_FREE_EVEN_FIRST 0
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#define TX_STATE_BOTH_FREE_ODD_FIRST 1
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#define TX_STATE_EVEN_FREE 2
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#define TX_STATE_ODD_FREE 3
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#define TX_STATE_NONE_FREE_EVEN_FIRST 4
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#define TX_STATE_NONE_FREE_ODD_FIRST 5
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#define BDT_OWN 0x80
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#define BDT_DATA1 0x40
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#define BDT_DATA0 0x00
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#define BDT_DTS 0x08
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#define BDT_STALL 0x04
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#define TX 1
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#define RX 0
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#define ODD 1
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#define EVEN 0
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#define DATA0 0
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#define DATA1 1
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#define GET_STATUS 0
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#define CLEAR_FEATURE 1
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#define SET_FEATURE 3
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#define SET_ADDRESS 5
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#define GET_DESCRIPTOR 6
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#define SET_DESCRIPTOR 7
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#define GET_CONFIGURATION 8
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#define SET_CONFIGURATION 9
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#define GET_INTERFACE 10
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#define SET_INTERFACE 11
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#define SYNCH_FRAME 12
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#define TX_STATE_BOTH_FREE_EVEN_FIRST 0
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#define TX_STATE_BOTH_FREE_ODD_FIRST 1
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#define TX_STATE_EVEN_FREE 2
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#define TX_STATE_ODD_FREE 3
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#define TX_STATE_NONE_FREE 4
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// ----- Macros -----
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#define BDT_PID(n) (((n) >> 2) & 15)
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#define BDT_DESC(count, data) (BDT_OWN | BDT_DTS \
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| ((data) ? BDT_DATA1 : BDT_DATA0) \
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| ((count) << 16))
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#define index(endpoint, tx, odd) (((endpoint) << 2) | ((tx) << 1) | (odd))
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#define stat2bufferdescriptor(stat) (table + ((stat) >> 2))
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// ----- Structs -----
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// buffer descriptor table
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typedef struct {
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uint32_t desc;
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void * addr;
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} bdt_t;
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static union {
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struct {
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union {
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struct {
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uint8_t bmRequestType;
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uint8_t bRequest;
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};
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uint16_t wRequestAndType;
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};
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uint16_t wValue;
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uint16_t wIndex;
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uint16_t wLength;
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};
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struct {
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uint32_t word1;
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uint32_t word2;
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};
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} setup;
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// ----- Variables -----
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__attribute__ ((section(".usbdescriptortable"), used))
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static bdt_t table[ (NUM_ENDPOINTS + 1) * 4 ];
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static usb_packet_t *rx_first [ NUM_ENDPOINTS ];
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static usb_packet_t *rx_last [ NUM_ENDPOINTS ];
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static usb_packet_t *tx_first [ NUM_ENDPOINTS ];
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static usb_packet_t *tx_last [ NUM_ENDPOINTS ];
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uint16_t usb_rx_byte_count_data[ NUM_ENDPOINTS ];
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static uint8_t tx_state[NUM_ENDPOINTS];
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// SETUP always uses a DATA0 PID for the data field of the SETUP transaction.
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// transactions in the data phase start with DATA1 and toggle (figure 8-12, USB1.1)
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// Status stage uses a DATA1 PID.
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static uint8_t ep0_rx0_buf[EP0_SIZE] __attribute__ ((aligned (4)));
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static uint8_t ep0_rx1_buf[EP0_SIZE] __attribute__ ((aligned (4)));
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static const uint8_t *ep0_tx_ptr = NULL;
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static uint16_t ep0_tx_len;
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static uint8_t ep0_tx_bdt_bank = 0;
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static uint8_t ep0_tx_data_toggle = 0;
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uint8_t usb_rx_memory_needed = 0;
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volatile uint8_t usb_configuration = 0;
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volatile uint8_t usb_reboot_timer = 0;
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static uint8_t reply_buffer[8];
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// ----- Functions -----
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static void endpoint0_stall()
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{
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USB0_ENDPT0 = USB_ENDPT_EPSTALL | USB_ENDPT_EPRXEN | USB_ENDPT_EPTXEN | USB_ENDPT_EPHSHK;
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}
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static void endpoint0_transmit( const void *data, uint32_t len )
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{
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table[index(0, TX, ep0_tx_bdt_bank)].addr = (void *)data;
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table[index(0, TX, ep0_tx_bdt_bank)].desc = BDT_DESC(len, ep0_tx_data_toggle);
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ep0_tx_data_toggle ^= 1;
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ep0_tx_bdt_bank ^= 1;
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}
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static void usb_setup()
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{
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const uint8_t *data = NULL;
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uint32_t datalen = 0;
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const usb_descriptor_list_t *list;
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uint32_t size;
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volatile uint8_t *reg;
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uint8_t epconf;
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const uint8_t *cfg;
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int i;
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switch ( setup.wRequestAndType )
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{
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case 0x0500: // SET_ADDRESS
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break;
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case 0x0900: // SET_CONFIGURATION
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#ifdef UART_DEBUG
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print("CONFIGURE - ");
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#endif
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usb_configuration = setup.wValue;
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reg = &USB0_ENDPT1;
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cfg = usb_endpoint_config_table;
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// clear all BDT entries, free any allocated memory...
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for ( i = 4; i < ( NUM_ENDPOINTS + 1) * 4; i++ )
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{
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if ( table[i].desc & BDT_OWN )
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{
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usb_free( (usb_packet_t *)((uint8_t *)(table[ i ].addr) - 8) );
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}
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}
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// free all queued packets
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for ( i = 0; i < NUM_ENDPOINTS; i++ )
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{
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usb_packet_t *p, *n;
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p = rx_first[i];
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while ( p )
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{
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n = p->next;
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usb_free(p);
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p = n;
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}
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rx_first[ i ] = NULL;
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rx_last[ i ] = NULL;
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p = tx_first[i];
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while (p)
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{
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n = p->next;
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usb_free(p);
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p = n;
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}
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tx_first[ i ] = NULL;
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tx_last[ i ] = NULL;
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usb_rx_byte_count_data[i] = 0;
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switch ( tx_state[ i ] )
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{
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case TX_STATE_EVEN_FREE:
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case TX_STATE_NONE_FREE_EVEN_FIRST:
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tx_state[ i ] = TX_STATE_BOTH_FREE_EVEN_FIRST;
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break;
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case TX_STATE_ODD_FREE:
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case TX_STATE_NONE_FREE_ODD_FIRST:
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tx_state[ i ] = TX_STATE_BOTH_FREE_ODD_FIRST;
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break;
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default:
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break;
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}
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}
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usb_rx_memory_needed = 0;
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for ( i = 1; i <= NUM_ENDPOINTS; i++ )
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{
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epconf = *cfg++;
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*reg = epconf;
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reg += 4;
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if ( epconf & USB_ENDPT_EPRXEN )
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{
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usb_packet_t *p;
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p = usb_malloc();
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if ( p )
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{
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table[ index( i, RX, EVEN ) ].addr = p->buf;
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table[ index( i, RX, EVEN ) ].desc = BDT_DESC( 64, 0 );
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}
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else
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{
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table[ index( i, RX, EVEN ) ].desc = 0;
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usb_rx_memory_needed++;
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}
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p = usb_malloc();
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if ( p )
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{
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table[ index( i, RX, ODD ) ].addr = p->buf;
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table[ index( i, RX, ODD ) ].desc = BDT_DESC( 64, 1 );
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}
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else
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{
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table[ index( i, RX, ODD ) ].desc = 0;
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usb_rx_memory_needed++;
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}
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}
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table[ index( i, TX, EVEN ) ].desc = 0;
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table[ index( i, TX, ODD ) ].desc = 0;
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}
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break;
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case 0x0880: // GET_CONFIGURATION
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reply_buffer[0] = usb_configuration;
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datalen = 1;
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data = reply_buffer;
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break;
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case 0x0080: // GET_STATUS (device)
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reply_buffer[0] = 0;
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reply_buffer[1] = 0;
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datalen = 2;
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data = reply_buffer;
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break;
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case 0x0082: // GET_STATUS (endpoint)
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if ( setup.wIndex > NUM_ENDPOINTS )
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{
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// TODO: do we need to handle IN vs OUT here?
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endpoint0_stall();
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return;
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}
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reply_buffer[0] = 0;
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reply_buffer[1] = 0;
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if ( *(uint8_t *)(&USB0_ENDPT0 + setup.wIndex * 4) & 0x02 )
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reply_buffer[0] = 1;
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data = reply_buffer;
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datalen = 2;
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break;
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case 0x0100: // CLEAR_FEATURE (device)
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case 0x0101: // CLEAR_FEATURE (interface)
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// TODO: Currently ignoring, perhaps useful? -HaaTa
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endpoint0_stall();
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return;
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case 0x0102: // CLEAR_FEATURE (interface)
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i = setup.wIndex & 0x7F;
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if ( i > NUM_ENDPOINTS || setup.wValue != 0 )
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{
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endpoint0_stall();
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return;
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}
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//(*(uint8_t *)(&USB0_ENDPT0 + setup.wIndex * 4)) &= ~0x02;
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// TODO: do we need to clear the data toggle here?
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//break;
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// FIXME: Clearing causes keyboard to freeze, likely an invalid clear
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// XXX: Ignoring seems to work, though this may not be the ideal behaviour -HaaTa
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endpoint0_stall();
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return;
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case 0x0300: // SET_FEATURE (device)
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case 0x0301: // SET_FEATURE (interface)
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// TODO: Currently ignoring, perhaps useful? -HaaTa
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endpoint0_stall();
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return;
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case 0x0302: // SET_FEATURE (endpoint)
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i = setup.wIndex & 0x7F;
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if ( i > NUM_ENDPOINTS || setup.wValue != 0 )
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{
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// TODO: do we need to handle IN vs OUT here?
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endpoint0_stall();
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return;
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}
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(*(uint8_t *)(&USB0_ENDPT0 + setup.wIndex * 4)) |= 0x02;
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// TODO: do we need to clear the data toggle here?
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break;
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case 0x0680: // GET_DESCRIPTOR
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case 0x0681:
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#ifdef UART_DEBUG
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print("desc:");
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printHex( setup.wValue );
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print( NL );
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#endif
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for ( list = usb_descriptor_list; 1; list++ )
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{
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if ( list->addr == NULL )
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break;
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if ( setup.wValue == list->wValue && setup.wIndex == list->wIndex )
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{
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data = list->addr;
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if ( (setup.wValue >> 8) == 3 )
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{
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// for string descriptors, use the descriptor's
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// length field, allowing runtime configured
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// length.
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datalen = *(list->addr);
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}
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else
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{
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datalen = list->length;
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}
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#if UART_DEBUG
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print("Desc found, ");
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printHex32( (uint32_t)data );
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print(",");
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printHex( datalen );
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print(",");
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printHex_op( data[0], 2 );
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printHex_op( data[1], 2 );
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printHex_op( data[2], 2 );
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printHex_op( data[3], 2 );
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printHex_op( data[4], 2 );
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printHex_op( data[5], 2 );
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print( NL );
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#endif
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goto send;
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}
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}
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#ifdef UART_DEBUG
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print( "desc: not found" NL );
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#endif
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endpoint0_stall();
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return;
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case 0x2221: // CDC_SET_CONTROL_LINE_STATE
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usb_cdc_line_rtsdtr = setup.wValue;
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//serial_print("set control line state\n");
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endpoint0_stall();
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return;
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case 0x21A1: // CDC_GET_LINE_CODING
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data = (uint8_t*)usb_cdc_line_coding;
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datalen = sizeof( usb_cdc_line_coding );
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goto send;
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case 0x2021: // CDC_SET_LINE_CODING
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// XXX Needed?
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//serial_print("set coding, waiting...\n");
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endpoint0_stall();
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return; // Cannot stall here (causes issues)
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case 0x0921: // HID SET_REPORT
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#ifdef UART_DEBUG
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print("SET_REPORT - ");
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printHex( setup.wValue );
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print(" - ");
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printHex( setup.wValue & 0xFF );
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print( NL );
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#endif
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USBKeys_LEDs = setup.wValue & 0xFF;
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endpoint0_stall();
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return;
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case 0x01A1: // HID GET_REPORT
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#ifdef UART_DEBUG
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print("GET_REPORT - ");
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printHex( USBKeys_LEDs );
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print(NL);
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#endif
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data = (uint8_t*)&USBKeys_LEDs;
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datalen = 1;
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goto send;
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case 0x0A21: // HID SET_IDLE
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#ifdef UART_DEBUG
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print("SET_IDLE - ");
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printHex( setup.wValue );
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print(NL);
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#endif
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USBKeys_Idle_Config = (setup.wValue >> 8);
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USBKeys_Idle_Count = 0;
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endpoint0_stall();
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return;
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case 0x0B21: // HID SET_PROTOCOL
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#ifdef UART_DEBUG
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print("SET_PROTOCOL - ");
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printHex( setup.wValue );
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print(" - ");
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printHex( setup.wValue & 0xFF );
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print(NL);
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#endif
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USBKeys_Protocol = setup.wValue & 0xFF; // 0 - Boot Mode, 1 - NKRO Mode
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endpoint0_stall();
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return;
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// case 0xC940:
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default:
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#ifdef UART_DEBUG_UNKNOWN
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print("UNKNOWN");
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#endif
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endpoint0_stall();
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return;
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}
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send:
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#ifdef UART_DEBUG
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print("setup send ");
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printHex32((uint32_t)data);
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print(",");
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printHex(datalen);
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print(NL);
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#endif
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if ( datalen > setup.wLength )
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datalen = setup.wLength;
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size = datalen;
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if ( size > EP0_SIZE )
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size = EP0_SIZE;
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endpoint0_transmit(data, size);
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data += size;
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datalen -= size;
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// See if transmit has finished
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if ( datalen == 0 && size < EP0_SIZE )
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return;
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size = datalen;
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if ( size > EP0_SIZE )
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size = EP0_SIZE;
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endpoint0_transmit(data, size);
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data += size;
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datalen -= size;
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|
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// See if transmit has finished
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if ( datalen == 0 && size < EP0_SIZE )
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return;
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|
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// Save rest of transfer for later? XXX
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ep0_tx_ptr = data;
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ep0_tx_len = datalen;
|
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}
|
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|
|
|
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//A bulk endpoint's toggle sequence is initialized to DATA0 when the endpoint
|
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//experiences any configuration event (configuration events are explained in
|
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//Sections 9.1.1.5 and 9.4.5).
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|
|
|
//Configuring a device or changing an alternate setting causes all of the status
|
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//and configuration values associated with endpoints in the affected interfaces
|
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//to be set to their default values. This includes setting the data toggle of
|
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//any endpoint using data toggles to the value DATA0.
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|
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//For endpoints using data toggle, regardless of whether an endpoint has the
|
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//Halt feature set, a ClearFeature(ENDPOINT_HALT) request always results in the
|
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//data toggle being reinitialized to DATA0.
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|
|
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static void usb_control( uint32_t stat )
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{
|
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#ifdef UART_DEBUG
|
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print("CONTROL - ");
|
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#endif
|
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bdt_t *b;
|
|
uint32_t pid, size;
|
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uint8_t *buf;
|
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const uint8_t *data;
|
|
|
|
b = stat2bufferdescriptor( stat );
|
|
pid = BDT_PID( b->desc );
|
|
buf = b->addr;
|
|
#ifdef UART_DEBUG
|
|
print("pid:");
|
|
printHex(pid);
|
|
print(", count:");
|
|
printHex32(b->desc);
|
|
print(" - ");
|
|
#endif
|
|
|
|
switch (pid)
|
|
{
|
|
case 0x0D: // Setup received from host
|
|
//serial_print("PID=Setup\n");
|
|
//if (count != 8) ; // panic?
|
|
// grab the 8 byte setup info
|
|
setup.word1 = *(uint32_t *)(buf);
|
|
setup.word2 = *(uint32_t *)(buf + 4);
|
|
|
|
// give the buffer back
|
|
b->desc = BDT_DESC( EP0_SIZE, DATA1 );
|
|
//table[index(0, RX, EVEN)].desc = BDT_DESC(EP0_SIZE, 1);
|
|
//table[index(0, RX, ODD)].desc = BDT_DESC(EP0_SIZE, 1);
|
|
|
|
// clear any leftover pending IN transactions
|
|
ep0_tx_ptr = NULL;
|
|
if ( ep0_tx_data_toggle )
|
|
{
|
|
}
|
|
//if (table[index(0, TX, EVEN)].desc & 0x80) {
|
|
//serial_print("leftover tx even\n");
|
|
//}
|
|
//if (table[index(0, TX, ODD)].desc & 0x80) {
|
|
//serial_print("leftover tx odd\n");
|
|
//}
|
|
table[index(0, TX, EVEN)].desc = 0;
|
|
table[index(0, TX, ODD)].desc = 0;
|
|
// first IN after Setup is always DATA1
|
|
ep0_tx_data_toggle = 1;
|
|
|
|
#ifdef UART_DEBUG_UNKNOWN
|
|
print("bmRequestType:");
|
|
printHex(setup.bmRequestType);
|
|
print(", bRequest:");
|
|
printHex(setup.bRequest);
|
|
print(", wValue:");
|
|
printHex(setup.wValue);
|
|
print(", wIndex:");
|
|
printHex(setup.wIndex);
|
|
print(", len:");
|
|
printHex(setup.wLength);
|
|
print(NL);
|
|
#endif
|
|
// actually "do" the setup request
|
|
usb_setup();
|
|
// unfreeze the USB, now that we're ready
|
|
USB0_CTL = USB_CTL_USBENSOFEN; // clear TXSUSPENDTOKENBUSY bit
|
|
break;
|
|
case 0x01: // OUT transaction received from host
|
|
case 0x02:
|
|
#ifdef UART_DEBUG
|
|
print("PID=OUT"NL);
|
|
#endif
|
|
// CDC Interface
|
|
if ( setup.wRequestAndType == 0x2021 /*CDC_SET_LINE_CODING*/ )
|
|
{
|
|
int i;
|
|
uint8_t *dst = (uint8_t *)usb_cdc_line_coding;
|
|
//serial_print("set line coding ");
|
|
for ( i = 0; i < 7; i++ )
|
|
{
|
|
//serial_phex(*buf);
|
|
*dst++ = *buf++;
|
|
}
|
|
//serial_phex32(usb_cdc_line_coding[0]);
|
|
//serial_print("\n");
|
|
if ( usb_cdc_line_coding[0] == 134 )
|
|
usb_reboot_timer = 15;
|
|
endpoint0_transmit( NULL, 0 );
|
|
}
|
|
|
|
// Keyboard Interface
|
|
if ( setup.word1 == 0x02000921 && setup.word2 == ( (1<<16) | KEYBOARD_INTERFACE ) )
|
|
{
|
|
USBKeys_LEDs = buf[0];
|
|
endpoint0_transmit( NULL, 0 );
|
|
}
|
|
// NKRO Keyboard Interface
|
|
if ( setup.word1 == 0x02000921 && setup.word2 == ( (1<<16) | NKRO_KEYBOARD_INTERFACE ) )
|
|
{
|
|
USBKeys_LEDs = buf[0];
|
|
endpoint0_transmit( NULL, 0 );
|
|
}
|
|
|
|
// give the buffer back
|
|
b->desc = BDT_DESC( EP0_SIZE, DATA1 );
|
|
break;
|
|
|
|
case 0x09: // IN transaction completed to host
|
|
#ifdef UART_DEBUG
|
|
print("PID=IN:");
|
|
printHex(stat);
|
|
print(NL);
|
|
#endif
|
|
|
|
// send remaining data, if any...
|
|
data = ep0_tx_ptr;
|
|
if ( data )
|
|
{
|
|
size = ep0_tx_len;
|
|
if (size > EP0_SIZE) size = EP0_SIZE;
|
|
endpoint0_transmit(data, size);
|
|
data += size;
|
|
ep0_tx_len -= size;
|
|
ep0_tx_ptr = (ep0_tx_len > 0 || size == EP0_SIZE) ? data : NULL;
|
|
}
|
|
|
|
if ( setup.bRequest == 5 && setup.bmRequestType == 0 )
|
|
{
|
|
setup.bRequest = 0;
|
|
#ifdef UART_DEBUG
|
|
print("set address: ");
|
|
printHex(setup.wValue);
|
|
print(NL);
|
|
#endif
|
|
USB0_ADDR = setup.wValue;
|
|
}
|
|
|
|
break;
|
|
default:
|
|
#ifdef UART_DEBUG
|
|
print("PID=unknown:");
|
|
printHex(pid);
|
|
print(NL);
|
|
#endif
|
|
break;
|
|
}
|
|
USB0_CTL = USB_CTL_USBENSOFEN; // clear TXSUSPENDTOKENBUSY bit
|
|
}
|
|
|
|
usb_packet_t *usb_rx( uint32_t endpoint )
|
|
{
|
|
//print("USB RX");
|
|
usb_packet_t *ret;
|
|
endpoint--;
|
|
if ( endpoint >= NUM_ENDPOINTS )
|
|
return NULL;
|
|
__disable_irq();
|
|
ret = rx_first[endpoint];
|
|
if ( ret )
|
|
rx_first[ endpoint ] = ret->next;
|
|
usb_rx_byte_count_data[ endpoint ] -= ret->len;
|
|
__enable_irq();
|
|
//serial_print("rx, epidx=");
|
|
//serial_phex(endpoint);
|
|
//serial_print(", packet=");
|
|
//serial_phex32(ret);
|
|
//serial_print("\n");
|
|
return ret;
|
|
}
|
|
|
|
static uint32_t usb_queue_byte_count( const usb_packet_t *p )
|
|
{
|
|
uint32_t count=0;
|
|
|
|
__disable_irq();
|
|
for ( ; p; p = p->next )
|
|
{
|
|
count += p->len;
|
|
}
|
|
__enable_irq();
|
|
return count;
|
|
}
|
|
|
|
uint32_t usb_tx_byte_count( uint32_t endpoint )
|
|
{
|
|
endpoint--;
|
|
if ( endpoint >= NUM_ENDPOINTS )
|
|
return 0;
|
|
return usb_queue_byte_count( tx_first[ endpoint ] );
|
|
}
|
|
|
|
uint32_t usb_tx_packet_count( uint32_t endpoint )
|
|
{
|
|
const usb_packet_t *p;
|
|
uint32_t count=0;
|
|
|
|
endpoint--;
|
|
if ( endpoint >= NUM_ENDPOINTS )
|
|
return 0;
|
|
__disable_irq();
|
|
for ( p = tx_first[ endpoint ]; p; p = p->next )
|
|
count++;
|
|
__enable_irq();
|
|
return count;
|
|
}
|
|
|
|
|
|
// Called from usb_free, but only when usb_rx_memory_needed > 0, indicating
|
|
// receive endpoints are starving for memory. The intention is to give
|
|
// endpoints needing receive memory priority over the user's code, which is
|
|
// likely calling usb_malloc to obtain memory for transmitting. When the
|
|
// user is creating data very quickly, their consumption could starve reception
|
|
// without this prioritization. The packet buffer (input) is assigned to the
|
|
// first endpoint needing memory.
|
|
//
|
|
void usb_rx_memory( usb_packet_t *packet )
|
|
{
|
|
//print("USB RX MEMORY");
|
|
unsigned int i;
|
|
const uint8_t *cfg;
|
|
|
|
cfg = usb_endpoint_config_table;
|
|
//serial_print("rx_mem:");
|
|
__disable_irq();
|
|
for ( i = 1; i <= NUM_ENDPOINTS; i++ )
|
|
{
|
|
if ( *cfg++ & USB_ENDPT_EPRXEN )
|
|
{
|
|
if ( table[ index( i, RX, EVEN ) ].desc == 0 )
|
|
{
|
|
table[ index( i, RX, EVEN ) ].addr = packet->buf;
|
|
table[ index( i, RX, EVEN ) ].desc = BDT_DESC( 64, 0 );
|
|
usb_rx_memory_needed--;
|
|
__enable_irq();
|
|
//serial_phex(i);
|
|
//serial_print(",even\n");
|
|
return;
|
|
}
|
|
if ( table[ index( i, RX, ODD ) ].desc == 0 )
|
|
{
|
|
table[ index( i, RX, ODD ) ].addr = packet->buf;
|
|
table[ index( i, RX, ODD ) ].desc = BDT_DESC( 64, 1 );
|
|
usb_rx_memory_needed--;
|
|
__enable_irq();
|
|
//serial_phex(i);
|
|
//serial_print(",odd\n");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
__enable_irq();
|
|
// we should never reach this point. If we get here, it means
|
|
// usb_rx_memory_needed was set greater than zero, but no memory
|
|
// was actually needed.
|
|
usb_rx_memory_needed = 0;
|
|
usb_free( packet );
|
|
return;
|
|
}
|
|
|
|
//#define index(endpoint, tx, odd) (((endpoint) << 2) | ((tx) << 1) | (odd))
|
|
//#define stat2bufferdescriptor(stat) (table + ((stat) >> 2))
|
|
|
|
void usb_tx( uint32_t endpoint, usb_packet_t *packet )
|
|
{
|
|
bdt_t *b = &table[ index( endpoint, TX, EVEN ) ];
|
|
uint8_t next;
|
|
|
|
endpoint--;
|
|
if ( endpoint >= NUM_ENDPOINTS )
|
|
return;
|
|
__disable_irq();
|
|
//serial_print("txstate=");
|
|
//serial_phex(tx_state[ endpoint ]);
|
|
//serial_print("\n");
|
|
switch ( tx_state[ endpoint ] )
|
|
{
|
|
case TX_STATE_BOTH_FREE_EVEN_FIRST:
|
|
next = TX_STATE_ODD_FREE;
|
|
break;
|
|
case TX_STATE_BOTH_FREE_ODD_FIRST:
|
|
b++;
|
|
next = TX_STATE_EVEN_FREE;
|
|
break;
|
|
case TX_STATE_EVEN_FREE:
|
|
next = TX_STATE_NONE_FREE_ODD_FIRST;
|
|
break;
|
|
case TX_STATE_ODD_FREE:
|
|
b++;
|
|
next = TX_STATE_NONE_FREE_EVEN_FIRST;
|
|
break;
|
|
default:
|
|
if (tx_first[ endpoint ] == NULL)
|
|
{
|
|
tx_first[ endpoint ] = packet;
|
|
}
|
|
else
|
|
{
|
|
tx_last[ endpoint ]->next = packet;
|
|
}
|
|
tx_last[ endpoint ] = packet;
|
|
__enable_irq();
|
|
return;
|
|
}
|
|
|
|
tx_state[ endpoint ] = next;
|
|
b->addr = packet->buf;
|
|
b->desc = BDT_DESC( packet->len, ((uint32_t)b & 8) ? DATA1 : DATA0 );
|
|
__enable_irq();
|
|
}
|
|
|
|
|
|
void usb_device_reload()
|
|
{
|
|
// MCHCK
|
|
#if defined(_mk20dx128vlf5_)
|
|
|
|
// MCHCK Kiibohd Variant
|
|
// Check to see if PTA3 (has a pull-up) is connected to GND (usually via jumper)
|
|
// Only allow reload if the jumper is present (security)
|
|
GPIOA_PDDR &= ~(1<<3); // Input
|
|
PORTA_PCR3 = PORT_PCR_PFE | PORT_PCR_MUX(1); // Internal pull-up
|
|
|
|
// Check for jumper
|
|
if ( GPIOA_PDIR & (1<<3) )
|
|
{
|
|
print( NL );
|
|
warn_print("Security jumper not present, cancelling firmware reload...");
|
|
info_msg("Replace jumper on middle 2 pins, or manually press the firmware reload button.");
|
|
}
|
|
else
|
|
{
|
|
// Copies variable into the VBAT register, must be identical to the variable in the bootloader to jump to the bootloader flash mode
|
|
for ( int pos = 0; pos < sizeof(sys_reset_to_loader_magic); pos++ )
|
|
(&VBAT)[ pos ] = sys_reset_to_loader_magic[ pos ];
|
|
SOFTWARE_RESET();
|
|
}
|
|
|
|
// Teensy 3.0 and 3.1
|
|
#else
|
|
asm volatile("bkpt");
|
|
#endif
|
|
}
|
|
|
|
|
|
void usb_isr()
|
|
{
|
|
uint8_t status, stat, t;
|
|
|
|
//serial_print("isr");
|
|
//status = USB0_ISTAT;
|
|
//serial_phex(status);
|
|
//serial_print("\n");
|
|
restart:
|
|
status = USB0_ISTAT;
|
|
/*
|
|
print("USB ISR STATUS: ");
|
|
printHex( status );
|
|
print( NL );
|
|
*/
|
|
|
|
if ( (status & USB_INTEN_SOFTOKEN /* 04 */ ) )
|
|
{
|
|
if ( usb_configuration )
|
|
{
|
|
t = usb_reboot_timer;
|
|
if ( t )
|
|
{
|
|
usb_reboot_timer = --t;
|
|
if ( !t )
|
|
usb_device_reload();
|
|
}
|
|
|
|
// CDC Interface
|
|
t = usb_cdc_transmit_flush_timer;
|
|
if ( t )
|
|
{
|
|
usb_cdc_transmit_flush_timer = --t;
|
|
if ( t == 0 )
|
|
usb_serial_flush_callback();
|
|
}
|
|
|
|
}
|
|
USB0_ISTAT = USB_INTEN_SOFTOKEN;
|
|
}
|
|
|
|
if ( (status & USB_ISTAT_TOKDNE /* 08 */ ) )
|
|
{
|
|
uint8_t endpoint;
|
|
stat = USB0_STAT;
|
|
//serial_print("token: ep=");
|
|
//serial_phex(stat >> 4);
|
|
//serial_print(stat & 0x08 ? ",tx" : ",rx");
|
|
//serial_print(stat & 0x04 ? ",odd\n" : ",even\n");
|
|
endpoint = stat >> 4;
|
|
if ( endpoint == 0 )
|
|
{
|
|
usb_control( stat );
|
|
}
|
|
else
|
|
{
|
|
bdt_t *b = stat2bufferdescriptor(stat);
|
|
usb_packet_t *packet = (usb_packet_t *)((uint8_t *)(b->addr) - 8);
|
|
#if 0
|
|
serial_print("ep:");
|
|
serial_phex(endpoint);
|
|
serial_print(", pid:");
|
|
serial_phex(BDT_PID(b->desc));
|
|
serial_print(((uint32_t)b & 8) ? ", odd" : ", even");
|
|
serial_print(", count:");
|
|
serial_phex(b->desc >> 16);
|
|
serial_print("\n");
|
|
#endif
|
|
endpoint--; // endpoint is index to zero-based arrays
|
|
|
|
if ( stat & 0x08 )
|
|
{ // transmit
|
|
usb_free( packet );
|
|
packet = tx_first[ endpoint ];
|
|
if ( packet )
|
|
{
|
|
//serial_print("tx packet\n");
|
|
tx_first[endpoint] = packet->next;
|
|
b->addr = packet->buf;
|
|
switch ( tx_state[ endpoint ] )
|
|
{
|
|
case TX_STATE_BOTH_FREE_EVEN_FIRST:
|
|
tx_state[ endpoint ] = TX_STATE_ODD_FREE;
|
|
break;
|
|
case TX_STATE_BOTH_FREE_ODD_FIRST:
|
|
tx_state[ endpoint ] = TX_STATE_EVEN_FREE;
|
|
break;
|
|
case TX_STATE_EVEN_FREE:
|
|
tx_state[ endpoint ] = TX_STATE_NONE_FREE_ODD_FIRST;
|
|
break;
|
|
case TX_STATE_ODD_FREE:
|
|
tx_state[ endpoint ] = TX_STATE_NONE_FREE_EVEN_FIRST;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
b->desc = BDT_DESC( packet->len, ((uint32_t)b & 8) ? DATA1 : DATA0 );
|
|
} else {
|
|
//serial_print("tx no packet\n");
|
|
switch ( tx_state[ endpoint ] )
|
|
{
|
|
case TX_STATE_BOTH_FREE_EVEN_FIRST:
|
|
case TX_STATE_BOTH_FREE_ODD_FIRST:
|
|
break;
|
|
case TX_STATE_EVEN_FREE:
|
|
tx_state[ endpoint ] = TX_STATE_BOTH_FREE_EVEN_FIRST;
|
|
break;
|
|
case TX_STATE_ODD_FREE:
|
|
tx_state[ endpoint ] = TX_STATE_BOTH_FREE_ODD_FIRST;
|
|
break;
|
|
default:
|
|
tx_state[ endpoint ] = ((uint32_t)b & 8)
|
|
? TX_STATE_ODD_FREE
|
|
: TX_STATE_EVEN_FREE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{ // receive
|
|
packet->len = b->desc >> 16;
|
|
if ( packet->len > 0 )
|
|
{
|
|
packet->index = 0;
|
|
packet->next = NULL;
|
|
if ( rx_first[ endpoint ] == NULL )
|
|
{
|
|
//serial_print("rx 1st, epidx=");
|
|
//serial_phex(endpoint);
|
|
//serial_print(", packet=");
|
|
//serial_phex32((uint32_t)packet);
|
|
//serial_print("\n");
|
|
rx_first[ endpoint ] = packet;
|
|
}
|
|
else
|
|
{
|
|
//serial_print("rx Nth, epidx=");
|
|
//serial_phex(endpoint);
|
|
//serial_print(", packet=");
|
|
//serial_phex32((uint32_t)packet);
|
|
//serial_print("\n");
|
|
rx_last[ endpoint ]->next = packet;
|
|
}
|
|
rx_last[ endpoint ] = packet;
|
|
usb_rx_byte_count_data[ endpoint ] += packet->len;
|
|
// TODO: implement a per-endpoint maximum # of allocated packets
|
|
// so a flood of incoming data on 1 endpoint doesn't starve
|
|
// the others if the user isn't reading it regularly
|
|
packet = usb_malloc();
|
|
if ( packet )
|
|
{
|
|
b->addr = packet->buf;
|
|
b->desc = BDT_DESC( 64, ((uint32_t)b & 8) ? DATA1 : DATA0 );
|
|
}
|
|
else
|
|
{
|
|
//serial_print("starving ");
|
|
//serial_phex(endpoint + 1);
|
|
//serial_print(((uint32_t)b & 8) ? ",odd\n" : ",even\n");
|
|
b->desc = 0;
|
|
usb_rx_memory_needed++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
b->desc = BDT_DESC( 64, ((uint32_t)b & 8) ? DATA1 : DATA0 );
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
USB0_ISTAT = USB_ISTAT_TOKDNE;
|
|
goto restart;
|
|
}
|
|
|
|
|
|
if ( status & USB_ISTAT_USBRST /* 01 */ )
|
|
{
|
|
//serial_print("reset\n");
|
|
|
|
// initialize BDT toggle bits
|
|
USB0_CTL = USB_CTL_ODDRST;
|
|
ep0_tx_bdt_bank = 0;
|
|
|
|
// set up buffers to receive Setup and OUT packets
|
|
table[index( 0, RX, EVEN ) ].desc = BDT_DESC( EP0_SIZE, 0 );
|
|
table[index( 0, RX, EVEN ) ].addr = ep0_rx0_buf;
|
|
table[index( 0, RX, ODD ) ].desc = BDT_DESC( EP0_SIZE, 0 );
|
|
table[index( 0, RX, ODD ) ].addr = ep0_rx1_buf;
|
|
table[index( 0, TX, EVEN ) ].desc = 0;
|
|
table[index( 0, TX, ODD ) ].desc = 0;
|
|
|
|
// activate endpoint 0
|
|
USB0_ENDPT0 = USB_ENDPT_EPRXEN | USB_ENDPT_EPTXEN | USB_ENDPT_EPHSHK;
|
|
|
|
// clear all ending interrupts
|
|
USB0_ERRSTAT = 0xFF;
|
|
USB0_ISTAT = 0xFF;
|
|
|
|
// set the address to zero during enumeration
|
|
USB0_ADDR = 0;
|
|
|
|
// enable other interrupts
|
|
USB0_ERREN = 0xFF;
|
|
USB0_INTEN = USB_INTEN_TOKDNEEN |
|
|
USB_INTEN_SOFTOKEN |
|
|
USB_INTEN_STALLEN |
|
|
USB_INTEN_ERROREN |
|
|
USB_INTEN_USBRSTEN |
|
|
USB_INTEN_SLEEPEN;
|
|
|
|
// is this necessary?
|
|
USB0_CTL = USB_CTL_USBENSOFEN;
|
|
return;
|
|
}
|
|
|
|
|
|
if ( (status & USB_ISTAT_STALL /* 80 */ ) )
|
|
{
|
|
//serial_print("stall:\n");
|
|
USB0_ENDPT0 = USB_ENDPT_EPRXEN | USB_ENDPT_EPTXEN | USB_ENDPT_EPHSHK;
|
|
USB0_ISTAT = USB_ISTAT_STALL;
|
|
}
|
|
if ( (status & USB_ISTAT_ERROR /* 02 */ ) )
|
|
{
|
|
uint8_t err = USB0_ERRSTAT;
|
|
USB0_ERRSTAT = err;
|
|
//serial_print("err:");
|
|
//serial_phex(err);
|
|
//serial_print("\n");
|
|
USB0_ISTAT = USB_ISTAT_ERROR;
|
|
}
|
|
|
|
if ( (status & USB_ISTAT_SLEEP /* 10 */ ) )
|
|
{
|
|
//serial_print("sleep\n");
|
|
USB0_ISTAT = USB_ISTAT_SLEEP;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
uint8_t usb_init()
|
|
{
|
|
#ifdef UART_DEBUG
|
|
print("USB INIT"NL);
|
|
#endif
|
|
|
|
// If no USB cable is attached, do not initialize usb
|
|
// XXX Test -HaaTa
|
|
//if ( USB0_OTGISTAT & USB_OTGSTAT_ID )
|
|
// return 0;
|
|
|
|
// Clear out endpoints table
|
|
for ( int i = 0; i <= NUM_ENDPOINTS * 4; i++ )
|
|
{
|
|
table[i].desc = 0;
|
|
table[i].addr = 0;
|
|
}
|
|
|
|
// this basically follows the flowchart in the Kinetis
|
|
// Quick Reference User Guide, Rev. 1, 03/2012, page 141
|
|
|
|
// assume 48 MHz clock already running
|
|
// SIM - enable clock
|
|
SIM_SCGC4 |= SIM_SCGC4_USBOTG;
|
|
|
|
// reset USB module
|
|
USB0_USBTRC0 = USB_USBTRC_USBRESET;
|
|
while ( (USB0_USBTRC0 & USB_USBTRC_USBRESET) != 0 ); // wait for reset to end
|
|
|
|
// set desc table base addr
|
|
USB0_BDTPAGE1 = ((uint32_t)table) >> 8;
|
|
USB0_BDTPAGE2 = ((uint32_t)table) >> 16;
|
|
USB0_BDTPAGE3 = ((uint32_t)table) >> 24;
|
|
|
|
// clear all ISR flags
|
|
USB0_ISTAT = 0xFF;
|
|
USB0_ERRSTAT = 0xFF;
|
|
USB0_OTGISTAT = 0xFF;
|
|
|
|
USB0_USBTRC0 |= 0x40; // undocumented bit
|
|
|
|
// enable USB
|
|
USB0_CTL = USB_CTL_USBENSOFEN;
|
|
USB0_USBCTRL = 0;
|
|
|
|
// enable reset interrupt
|
|
USB0_INTEN = USB_INTEN_USBRSTEN;
|
|
|
|
// enable interrupt in NVIC...
|
|
NVIC_SET_PRIORITY( IRQ_USBOTG, 112 );
|
|
NVIC_ENABLE_IRQ( IRQ_USBOTG );
|
|
|
|
// enable d+ pullup
|
|
USB0_CONTROL = USB_CONTROL_DPPULLUPNONOTG;
|
|
|
|
return 1;
|
|
}
|
|
|
|
// return 0 if the USB is not configured, or the configuration
|
|
// number selected by the HOST
|
|
uint8_t usb_configured()
|
|
{
|
|
return usb_configuration;
|
|
}
|
|
|