diff options
Diffstat (limited to 'cctools/lib/cp-usb-async.c')
| -rw-r--r-- | cctools/lib/cp-usb-async.c | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/cctools/lib/cp-usb-async.c b/cctools/lib/cp-usb-async.c deleted file mode 100644 index 6539394b..00000000 --- a/cctools/lib/cp-usb-async.c +++ /dev/null @@ -1,188 +0,0 @@ -/* - * Copyright © 2008 Keith Packard <keithp@keithp.com> - * - * 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; either version 2 of the License, or - * (at your option) any later version. - * - * 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 <stdio.h> -#include <errno.h> -#include <stdlib.h> -#include <unistd.h> -#include "cp-usb-async.h" -#include "ccdbg-debug.h" - -#define MAX_OUTSTANDING 256 -#define CP_TIMEOUT 1000 /* ms */ - -struct cp_usb_packet { - struct libusb_transfer *transfer; - enum { packet_read, packet_write } direction; - unsigned char data[9]; - uint8_t *valuep; -}; - -struct cp_usb_async { - libusb_context *ctx; - libusb_device_handle *handle; - struct cp_usb_packet packet[MAX_OUTSTANDING]; - int p, ack; - uint8_t value; - uint8_t set; -}; - -struct cp_usb_async * -cp_usb_async_open(void) -{ - struct cp_usb_async *cp; - int ret; - - cp = calloc(sizeof (struct cp_usb_async), 1); - if (!cp) - return NULL; - ret = libusb_init(&cp->ctx); - if (ret) { - free(cp); - return NULL; - } - cp->handle = libusb_open_device_with_vid_pid(cp->ctx, - 0x10c4, 0xea60); - cp->ack = -1; - if (!cp->handle) { - libusb_exit(cp->ctx); - free(cp); - return NULL; - } - cp->value = 0; - cp->set = 0; - return cp; -} - -void -cp_usb_async_close(struct cp_usb_async *cp) -{ - libusb_close(cp->handle); - libusb_exit(cp->ctx); - free(cp); -} - -static void -cp_usb_async_transfer_callback(struct libusb_transfer *transfer) -{ - struct cp_usb_async *cp = transfer->user_data; - int p; - - for (p = 0; p < cp->p; p++) - if (cp->packet[p].transfer == transfer) - break; - if (p == cp->p) { - fprintf(stderr, "unknown transfer\n"); - return; - } - switch (cp->packet[p].direction) { - case packet_read: - ccdbg_debug(CC_DEBUG_USB_ASYNC, "ack read %d 0x%02x\n", - p, cp->packet[p].data[8]); - *cp->packet[p].valuep = cp->packet[p].data[8]; - break; - case packet_write: - ccdbg_debug(CC_DEBUG_USB_ASYNC, "ack write %d\n", p); - break; - } - if (p > cp->ack) - cp->ack = p; -} - -void -cp_usb_async_write(struct cp_usb_async *cp, uint8_t mask, uint8_t value) -{ - int p; - uint16_t gpio_set; - int ret; - - if (cp->set) { - value = (cp->value & ~mask) | (value & mask); - mask = value ^ cp->value; - } - cp->set = 1; - cp->value = value; - gpio_set = ((uint16_t) value << 8) | mask; - if (cp->p == MAX_OUTSTANDING) - cp_usb_async_sync(cp); - p = cp->p; - if (!cp->packet[p].transfer) - cp->packet[p].transfer = libusb_alloc_transfer(0); - cp->packet[p].direction = packet_write; - libusb_fill_control_setup(cp->packet[p].data, - 0x40, /* request */ - 0xff, /* request type */ - 0x37e1, /* value */ - gpio_set, /* index */ - 0); /* length */ - - libusb_fill_control_transfer(cp->packet[p].transfer, - cp->handle, - cp->packet[p].data, - cp_usb_async_transfer_callback, - cp, - CP_TIMEOUT); - ccdbg_debug(CC_DEBUG_USB_ASYNC, "Write packet %d 0x%x 0x%x\n", p, mask, value); - ret = libusb_submit_transfer(cp->packet[p].transfer); - if (ret) - fprintf(stderr, "libusb_submit_transfer failed %d\n", ret); - cp->p++; -} - -void -cp_usb_async_read(struct cp_usb_async *cp, uint8_t *valuep) -{ - int p; - int ret; - - if (cp->p == MAX_OUTSTANDING) - cp_usb_async_sync(cp); - p = cp->p; - if (!cp->packet[p].transfer) - cp->packet[p].transfer = libusb_alloc_transfer(0); - cp->packet[p].valuep = valuep; - cp->packet[p].direction = packet_read; - libusb_fill_control_setup(cp->packet[p].data, - 0xc0, /* request */ - 0xff, /* request type */ - 0x00c2, /* value */ - 0, /* index */ - 1); /* length */ - - libusb_fill_control_transfer(cp->packet[p].transfer, - cp->handle, - cp->packet[p].data, - cp_usb_async_transfer_callback, - cp, - CP_TIMEOUT); - ccdbg_debug(CC_DEBUG_USB_ASYNC, "Read packet %d\n", p); - ret = libusb_submit_transfer(cp->packet[p].transfer); - if (ret) - fprintf(stderr, "libusb_submit_transfer failed %d\n", ret); - cp->p++; -} - -void -cp_usb_async_sync(struct cp_usb_async *cp) -{ - while (cp->ack < cp->p - 1) { - libusb_handle_events(cp->ctx); - } - cp->p = 0; - cp->ack = -1; -} |