773 lines
18 KiB
C
773 lines
18 KiB
C
/*
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* Mitsubishi P93D/P95D Monochrome Thermal Photo Printer CUPS backend
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*
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* (c) 2016-2018 Solomon Peachy <pizza@shaftnet.org>
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*
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* Development of this backend was sponsored by:
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*
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* A benefactor who wishes to remain anonymous
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*
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* The latest version of this program can be found at:
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*
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* http://git.shaftnet.org/cgit/selphy_print.git
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 3 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* [http://www.gnu.org/licenses/gpl-3.0.html]
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*
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* SPDX-License-Identifier: GPL-3.0+
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <signal.h>
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#define BACKEND mitsup95d_backend
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#include "backend_common.h"
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#define USB_VID_MITSU 0x06D3
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#define USB_PID_MITSU_P93D 0x0398
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#define USB_PID_MITSU_P95D 0x3b10
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/* Private data structure */
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struct mitsup95d_ctx {
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struct libusb_device_handle *dev;
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uint8_t endp_up;
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uint8_t endp_down;
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int type;
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uint8_t mem_clr[4]; // 1b 5a 43 00
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int mem_clr_present;
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uint8_t hdr[2]; // 1b 51
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uint8_t hdr1[50]; // 1b 57 20 2e ...
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uint8_t hdr2[50]; // 1b 57 21 2e ...
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uint8_t hdr3[50]; // 1b 57 22 2e ...
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uint8_t hdr4[42]; // 1b 58 ...
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int hdr4_len; // 36 (P95) or 42 (P93)
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uint8_t plane[12]; // 1b 5a 74 00 ...
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uint8_t *databuf;
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uint32_t datalen;
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uint8_t ftr[2];
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struct marker marker;
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};
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#define QUERYRESP_SIZE_MAX 9
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static const char *mitsup93d_errors(uint8_t code)
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{
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switch (code) {
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case 0x6f: return "Door Open";
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case 0x50: return "No Paper";
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default: return "Unknown Error";
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}
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}
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static const char *mitsup95d_errors(uint8_t code)
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{
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switch (code & 0xf) {
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case 3: return "Door Open";
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case 4: return "No Paper";
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default: return "Unknown Error";
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}
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}
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static void *mitsup95d_init(void)
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{
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struct mitsup95d_ctx *ctx = malloc(sizeof(struct mitsup95d_ctx));
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if (!ctx) {
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ERROR("Memory Allocation Failure!\n");
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return NULL;
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}
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memset(ctx, 0, sizeof(struct mitsup95d_ctx));
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return ctx;
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}
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static int mitsup95d_get_status(struct mitsup95d_ctx *ctx, uint8_t *resp)
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{
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uint8_t querycmd[4] = { 0x1b, 0x72, 0x00, 0x00 };
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int ret;
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int num;
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/* P93D is ... special. Windows switches to this halfway through
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but it seems be okay to use it everywhere */
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if (ctx->type == P_MITSU_P93D) {
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querycmd[2] = 0x03;
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}
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/* Query Status to sanity-check job */
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if ((ret = send_data(ctx->dev, ctx->endp_down,
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querycmd, sizeof(querycmd))))
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return CUPS_BACKEND_FAILED;
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ret = read_data(ctx->dev, ctx->endp_up,
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resp, QUERYRESP_SIZE_MAX, &num);
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if (ret < 0)
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return CUPS_BACKEND_FAILED;
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if (ctx->type == P_MITSU_P95D && num != 9) {
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return CUPS_BACKEND_FAILED;
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} else if (ctx->type == P_MITSU_P93D && num != 8) {
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return CUPS_BACKEND_FAILED;
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}
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return CUPS_BACKEND_OK;
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}
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static int mitsup95d_attach(void *vctx, struct libusb_device_handle *dev, int type,
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uint8_t endp_up, uint8_t endp_down, uint8_t jobid)
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{
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struct mitsup95d_ctx *ctx = vctx;
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UNUSED(jobid);
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ctx->dev = dev;
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ctx->endp_up = endp_up;
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ctx->endp_down = endp_down;
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ctx->type = type;
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ctx->marker.color = "#000000"; /* Ie black! */
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ctx->marker.name = "Unknown";
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ctx->marker.levelmax = -1;
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ctx->marker.levelnow = -2;
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return CUPS_BACKEND_OK;
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}
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static void mitsup95d_teardown(void *vctx) {
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struct mitsup95d_ctx *ctx = vctx;
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if (!ctx)
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return;
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if (ctx->databuf)
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free(ctx->databuf);
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free(ctx);
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}
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static int mitsup95d_read_parse(void *vctx, int data_fd) {
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struct mitsup95d_ctx *ctx = vctx;
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uint8_t buf[2]; /* Enough to read in any header */
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uint8_t tmphdr[50];
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uint8_t *ptr;
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int i;
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int remain;
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int ptr_offset;
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if (!ctx)
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return CUPS_BACKEND_FAILED;
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if (ctx->databuf) {
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free(ctx->databuf);
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ctx->databuf = NULL;
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}
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ctx->mem_clr_present = 0;
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top:
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i = read(data_fd, buf, sizeof(buf));
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if (i == 0)
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return CUPS_BACKEND_CANCEL;
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if (i < 0)
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return CUPS_BACKEND_CANCEL;
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if (buf[0] != 0x1b) {
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ERROR("malformed data stream\n");
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return CUPS_BACKEND_CANCEL;
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}
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switch (buf[1]) {
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case 0x50: /* Footer */
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remain = 2;
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ptr = ctx->ftr;
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break;
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case 0x51: /* Job Header */
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remain = 2;
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ptr = ctx->hdr;
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break;
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case 0x57: /* Geeneral headers */
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remain = sizeof(tmphdr);
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ptr = tmphdr;
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break;
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case 0x58: /* User Comment */
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if (ctx->type == P_MITSU_P93D)
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ctx->hdr4_len = 42;
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else
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ctx->hdr4_len = 36;
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remain = ctx->hdr4_len;
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ptr = ctx->hdr4;
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break;
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case 0x5a: /* Plane header OR printer reset */
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// reset memory: 1b 5a 43 ... [len 04]
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// plane header: 1b 5a 74 ... [len 12]
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// Read in the minimum length, and clean it up later */
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ptr = tmphdr;
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remain = 4;
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break;
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default:
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ERROR("Unrecognized command! (%02x %02x)\n", buf[0], buf[1]);
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return CUPS_BACKEND_CANCEL;
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}
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memcpy(ptr, buf, sizeof(buf));
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remain -= sizeof(buf);
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ptr_offset = sizeof(buf);
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while (remain) {
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i = read(data_fd, ptr + ptr_offset, remain);
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if (i == 0)
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return CUPS_BACKEND_CANCEL;
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if (i < 0)
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return CUPS_BACKEND_CANCEL;
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remain -= i;
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ptr_offset += i;
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/* Handle the ambiguous 0x5a block */
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if (buf[1] == 0x5a && remain == 0) {
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if (tmphdr[2] == 0x74) { /* plane header */
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ptr = ctx->plane;
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remain = 12 - ptr_offset; /* Finish reading */
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} else if (tmphdr[2] == 0x43) { /* reset memory */
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ptr = ctx->mem_clr;
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ctx->mem_clr_present = 1;
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remain = 4 - ptr_offset;
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}
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memcpy(ptr, tmphdr, ptr_offset);
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buf[1] = 0xff;
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}
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}
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if (ptr == tmphdr) {
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if (tmphdr[3] != 46) {
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ERROR("Unexpected header chunk: %02x %02x %02x %02x\n",
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tmphdr[0], tmphdr[1], tmphdr[2], tmphdr[3]);
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return CUPS_BACKEND_CANCEL;
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}
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switch (tmphdr[2]) {
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case 0x20:
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ptr = ctx->hdr1;
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break;
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case 0x21:
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ptr = ctx->hdr2;
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break;
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case 0x22:
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ptr = ctx->hdr3;
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break;
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default:
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ERROR("Unexpected header chunk: %02x %02x %02x %02x\n",
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tmphdr[0], tmphdr[1], tmphdr[2], tmphdr[3]);
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}
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memcpy(ptr, tmphdr, sizeof(tmphdr));
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} else if (ptr == ctx->plane) {
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uint16_t rows = ctx->plane[10] << 8 | ctx->plane[11];
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uint16_t cols = ctx->plane[8] << 8 | ctx->plane[9];
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remain = rows * cols;
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/* Allocate buffer for the payload */
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ctx->datalen = 0;
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ctx->databuf = malloc(remain);
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if (!ctx->databuf) {
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ERROR("Memory allocation failure!\n");
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return CUPS_BACKEND_RETRY_CURRENT;
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}
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/* Read it in */
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while (remain) {
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i = read(data_fd, ctx->databuf + ctx->datalen, remain);
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if (i == 0)
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return CUPS_BACKEND_CANCEL;
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if (i < 0)
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return CUPS_BACKEND_CANCEL;
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remain -= i;
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ctx->datalen += i;
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}
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} else if (ptr == ctx->ftr) {
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return CUPS_BACKEND_OK;
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}
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goto top;
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}
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static int mitsup95d_main_loop(void *vctx, int copies) {
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struct mitsup95d_ctx *ctx = vctx;
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uint8_t queryresp[QUERYRESP_SIZE_MAX];
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int ret;
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if (!ctx)
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return CUPS_BACKEND_FAILED;
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/* Update printjob header to reflect number of requested copies */
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if (ctx->hdr2[13] != 0xff)
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ctx->hdr2[13] = copies;
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if (ctx->type == P_MITSU_P95D) {
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/* XXX Update unknown header field to match sniffs */
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if (ctx->hdr1[18] == 0x00)
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ctx->hdr1[18] = 0x01;
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}
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INFO("Waiting for printer idle\n");
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/* Query Status to make sure printer is idle */
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do {
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ret = mitsup95d_get_status(ctx, queryresp);
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if (ret)
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return ret;
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if (ctx->type == P_MITSU_P95D) {
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if (queryresp[6] & 0x40) {
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INFO("Printer Status: %s (%02x)\n", mitsup95d_errors(queryresp[6]), queryresp[6]);
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return CUPS_BACKEND_STOP;
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}
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if (queryresp[5] == 0x00)
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break;
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} else {
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if (queryresp[6] == 0x45) {
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ERROR("Printer error %02x\n", queryresp[7]);
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return CUPS_BACKEND_STOP;
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}
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if (queryresp[6] == 0x30)
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break;
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}
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sleep(1);
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} while (1);
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INFO("Sending print job\n");
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/* Send over Memory Clear, if present */
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if (ctx->mem_clr_present) {
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if ((ret = send_data(ctx->dev, ctx->endp_down,
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ctx->mem_clr, sizeof(ctx->mem_clr))))
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return CUPS_BACKEND_FAILED;
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}
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/* Send Job Start */
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if ((ret = send_data(ctx->dev, ctx->endp_down,
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ctx->hdr, sizeof(ctx->hdr))))
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return CUPS_BACKEND_FAILED;
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/* Send over headers */
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if ((ret = send_data(ctx->dev, ctx->endp_down,
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ctx->hdr1, sizeof(ctx->hdr1))))
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return CUPS_BACKEND_FAILED;
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if ((ret = send_data(ctx->dev, ctx->endp_down,
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ctx->hdr2, sizeof(ctx->hdr2))))
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return CUPS_BACKEND_FAILED;
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if ((ret = send_data(ctx->dev, ctx->endp_down,
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ctx->hdr3, sizeof(ctx->hdr3))))
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return CUPS_BACKEND_FAILED;
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if ((ret = send_data(ctx->dev, ctx->endp_down,
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ctx->hdr4, ctx->hdr4_len)))
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return CUPS_BACKEND_FAILED;
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/* Send plane header and image data */
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if ((ret = send_data(ctx->dev, ctx->endp_down,
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ctx->plane, sizeof(ctx->plane))))
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return CUPS_BACKEND_FAILED;
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if ((ret = send_data(ctx->dev, ctx->endp_down,
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ctx->databuf, ctx->datalen)))
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return CUPS_BACKEND_FAILED;
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/* Query Status to sanity-check job */
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ret = mitsup95d_get_status(ctx, queryresp);
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if (ret)
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return ret;
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if (ctx->type == P_MITSU_P95D) {
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if (queryresp[6] & 0x40) {
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INFO("Printer Status: %s (%02x)\n", mitsup95d_errors(queryresp[6]), queryresp[6]);
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return CUPS_BACKEND_STOP;
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}
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if (queryresp[5] != 0x00) {
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ERROR("Printer not ready (%02x)!\n", queryresp[5]);
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return CUPS_BACKEND_CANCEL;
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}
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} else {
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if (queryresp[6] == 0x45) {
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INFO("Printer Status: %s (%02x)\n", mitsup93d_errors(queryresp[7]), queryresp[7]);
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return CUPS_BACKEND_STOP;
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}
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if (queryresp[6] != 0x30) {
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ERROR("Printer not ready (%02x)!\n", queryresp[6]);
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return CUPS_BACKEND_CANCEL;
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}
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}
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/* Send over Footer */
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if ((ret = send_data(ctx->dev, ctx->endp_down,
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ctx->ftr, sizeof(ctx->ftr))))
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return CUPS_BACKEND_FAILED;
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INFO("Waiting for completion\n");
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/* Query status until we're done.. */
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do {
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sleep(1);
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/* Query Status */
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ret = mitsup95d_get_status(ctx, queryresp);
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if (ret)
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return ret;
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if (ctx->type == P_MITSU_P95D) {
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if (queryresp[6] & 0x40) {
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INFO("Printer Status: %s (%02x)\n", mitsup95d_errors(queryresp[6]), queryresp[6]);
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return CUPS_BACKEND_STOP;
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}
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if (queryresp[5] == 0x00)
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break;
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if (queryresp[7] > 0) {
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if (fast_return) {
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INFO("Fast return mode enabled.\n");
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break;
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}
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}
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} else {
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if (queryresp[6] == 0x45) {
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INFO("Printer Status: %s (%02x)\n", mitsup93d_errors(queryresp[7]), queryresp[7]);
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return CUPS_BACKEND_STOP;
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}
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if (queryresp[6] == 0x30)
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break;
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if (queryresp[6] == 0x43 && queryresp[7] > 0) {
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if (fast_return) {
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INFO("Fast return mode enabled.\n");
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break;
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}
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}
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}
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} while(1);
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INFO("Print complete\n");
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return CUPS_BACKEND_OK;
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}
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static int mitsup95d_dump_status(struct mitsup95d_ctx *ctx)
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{
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uint8_t queryresp[QUERYRESP_SIZE_MAX];
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int ret;
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ret = mitsup95d_get_status(ctx, queryresp);
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if (ret)
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return ret;
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if (ctx->type == P_MITSU_P95D) {
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if (queryresp[6] & 0x40) {
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INFO("Printer Status: %s (%02x)\n", mitsup95d_errors(queryresp[6]), queryresp[6]);
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} else if (queryresp[5] == 0x00) {
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INFO("Printer Status: Idle\n");
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} else if (queryresp[5] == 0x02 && queryresp[7] > 0) {
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INFO("Printer Status: Printing (%d) copies remaining\n", queryresp[7]);
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}
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} else {
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if (queryresp[6] == 0x45) {
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INFO("Printer Status: %s (%02x)\n", mitsup93d_errors(queryresp[7]), queryresp[7]);
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} else if (queryresp[6] == 0x30) {
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INFO("Printer Status: Idle\n");
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} else if (queryresp[6] == 0x43 && queryresp[7] > 0) {
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INFO("Printer Status: Printing (%d) copies remaining\n", queryresp[7]);
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}
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}
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return CUPS_BACKEND_OK;
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}
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static void mitsup95d_cmdline(void)
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{
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DEBUG("\t\t[ -s ] # Query status\n");
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}
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static int mitsup95d_cmdline_arg(void *vctx, int argc, char **argv)
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{
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struct mitsup95d_ctx *ctx = vctx;
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int i, j = 0;
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if (!ctx)
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return -1;
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while ((i = getopt(argc, argv, GETOPT_LIST_GLOBAL "s")) >= 0) {
|
|
switch(i) {
|
|
GETOPT_PROCESS_GLOBAL
|
|
case 's':
|
|
j = mitsup95d_dump_status(ctx);
|
|
break;
|
|
default:
|
|
break; /* Ignore completely */
|
|
}
|
|
|
|
if (j) return j;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mitsup95d_query_markers(void *vctx, struct marker **markers, int *count)
|
|
{
|
|
struct mitsup95d_ctx *ctx = vctx;
|
|
uint8_t queryresp[QUERYRESP_SIZE_MAX];
|
|
|
|
if (mitsup95d_get_status(ctx, queryresp))
|
|
return CUPS_BACKEND_FAILED;
|
|
|
|
ctx->marker.levelnow = -3;
|
|
|
|
if (ctx->type == P_MITSU_P95D) {
|
|
if (queryresp[6] & 0x40) {
|
|
ctx->marker.levelnow = 0;
|
|
}
|
|
} else {
|
|
if (queryresp[6] == 0x45) {
|
|
ctx->marker.levelnow = 0;
|
|
}
|
|
}
|
|
|
|
*markers = &ctx->marker;
|
|
*count = 1;
|
|
|
|
return CUPS_BACKEND_OK;
|
|
}
|
|
|
|
static const char *mitsup95d_prefixes[] = {
|
|
"mitsup9x",
|
|
"mitsup95d", "mitsup93d",
|
|
NULL
|
|
};
|
|
|
|
/* Exported */
|
|
struct dyesub_backend mitsup95d_backend = {
|
|
.name = "Mitsubishi P93D/P95D",
|
|
.version = "0.09",
|
|
.uri_prefixes = mitsup95d_prefixes,
|
|
.cmdline_arg = mitsup95d_cmdline_arg,
|
|
.cmdline_usage = mitsup95d_cmdline,
|
|
.init = mitsup95d_init,
|
|
.attach = mitsup95d_attach,
|
|
.teardown = mitsup95d_teardown,
|
|
.read_parse = mitsup95d_read_parse,
|
|
.main_loop = mitsup95d_main_loop,
|
|
.query_markers = mitsup95d_query_markers,
|
|
.devices = {
|
|
{ USB_VID_MITSU, USB_PID_MITSU_P93D, P_MITSU_P93D, NULL, "mitsup93d"},
|
|
{ USB_VID_MITSU, USB_PID_MITSU_P95D, P_MITSU_P95D, NULL, "mitsup95d"},
|
|
{ 0, 0, 0, NULL, NULL}
|
|
}
|
|
};
|
|
|
|
/*****************************************************
|
|
|
|
Mitsubishi P93D/P95D Spool Format
|
|
|
|
...All fields are BIG ENDIAN.
|
|
|
|
MEMORY_CLEAR (optional)
|
|
|
|
1b 5a 43 00
|
|
|
|
JOB_HDR
|
|
|
|
1b 51
|
|
|
|
PRINT_SETUP
|
|
|
|
1b 57 20 2e 00 0a 00 ZZ 00 00 00 00 00 00 CC CC
|
|
RR RR XX 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00
|
|
|
|
XX == 01 seen in sniffs, 00 seen in dumps. Unknown purpose.
|
|
ZZ == 00 on P93D, 02 on P95D
|
|
|
|
CC CC = columns, RR RR = rows (print dimensions)
|
|
|
|
PRINT_OPTIONS
|
|
|
|
P95:
|
|
|
|
1b 57 21 2e 00 4a aa 00 20 TT 00 00 64 NN 00 MM
|
|
[[ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 ]] 00 00 00 02 00 00 00 00 00 00 00 00 00 00
|
|
00 XY
|
|
|
|
P93:
|
|
|
|
1b 57 21 2e 00 4a aa 00 00 TT 00 00 00 NN 00 MM
|
|
[[ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 ]] 00 00 00 02 00 00 00 00 00 00 00 00 00 00
|
|
00 XY
|
|
|
|
NN = copies
|
|
1..200
|
|
0xff (continuous print)
|
|
MM = comment type
|
|
00 = None
|
|
01 = Printer Setting
|
|
02 = Date
|
|
03 = DateTime
|
|
[[ .. ]] = actual comment (18 bytes), see below.
|
|
|
|
TT = media type
|
|
|
|
P95D:
|
|
|
|
00 = Standard
|
|
01 = High Density
|
|
02 = High Glossy
|
|
03 = High Glossy (K95HG)
|
|
|
|
P93D:
|
|
|
|
00 = High Density
|
|
01 = High Glossy
|
|
02 = Standard
|
|
|
|
X = media cut length (P95D ONLY. P93 is 0)
|
|
4..8 (mm)
|
|
Y = flags
|
|
0x04 = Paper save
|
|
0x03 = Buzzer (3 = high, 2 = low, 0 = off)
|
|
|
|
GAMMA (P95)
|
|
|
|
1b 57 22 2e 00 15 TT 00 00 00 00 00 LL BB CC 00
|
|
[[ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 ]]
|
|
|
|
LL = Gamma table
|
|
00 = Printer Setting
|
|
01..05 Gamma table 1..5
|
|
10 = Use LUT
|
|
BB = Brightness (signed 8-bit)
|
|
CC = Contrast (signed 8-bit)
|
|
TT = Table present
|
|
00 = No
|
|
01 = Yes
|
|
[[ .. ]] = Gamma table, loaded from LUT on disk. (skip first 16 bytes)
|
|
|
|
GAMMA (P93)
|
|
|
|
1b 57 22 2e 00 d5 00 00 00 00 00 00 SS 00 LL 00
|
|
BB 00 CC 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00
|
|
|
|
SS = Sharpening (0 = low, 1 = normal, 2 = high)
|
|
LL = Gamma table
|
|
00..04 Gamma table 1..5
|
|
BB = Brightness (signed 8-bit)
|
|
CC = Contrast (signed 8-bit)
|
|
|
|
USER_COMMENT (P95)
|
|
|
|
1b 58 [[ 20 20 20 20 20 20 20 20 20 20 20 20 20
|
|
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
|
|
20 20 20 ]]
|
|
|
|
[[ .. ]] = Actual comment. 34 bytes payload, 0x20 -> 0x7e
|
|
(Null terminated?)
|
|
|
|
USER_COMMENT (P93)
|
|
|
|
1b 58 [[ 20 20 20 20 20 20 20 20 20 20 20 20 20
|
|
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
|
|
20 20 20 20 20 20 20 20 20 20 ]]
|
|
|
|
[[ .. ]] = Actual comment. 40 bytes payload, 0x20 -> 0x7e
|
|
(Null terminated?)
|
|
|
|
IMAGE_DATA
|
|
|
|
1b 5a 74 00 00 00 YY YY CC CC RR RR
|
|
[[ .. data ... ]]
|
|
|
|
CC CC = columns
|
|
RR CC = rows
|
|
YY YY = row offset
|
|
|
|
Followed by C*R bytes of monochrome data, 0xff = white, 0x00 = black
|
|
|
|
PRINT_START
|
|
|
|
1b 50
|
|
|
|
*********************************
|
|
|
|
P95D Printer Comms:
|
|
|
|
STATUS query
|
|
|
|
-> 1b 72 00 00
|
|
<- e4 72 00 00 04 XX ZZ YY 00
|
|
|
|
YY == remaining copies
|
|
XX == Status?
|
|
00 == Idle
|
|
02 == Printing
|
|
ZZ == Error!
|
|
00 == None
|
|
43 == Door open
|
|
44 == No Paper
|
|
4? == "Button"
|
|
4? == "Gear Lock"
|
|
4? == Head Up
|
|
^
|
|
\--- 0x40 appears to be a flag that indicates error.
|
|
|
|
P93D Printer Comms:
|
|
|
|
STATUS query
|
|
|
|
-> 1b 72 0? 00
|
|
<- e4 72 0? 00 03 XX YY ZZ
|
|
|
|
? could be 0x00 or 0x03. Seen both.
|
|
|
|
Seen: 30 30 30
|
|
30 43 01 <- 1 copies remaining
|
|
30 43 00 <- 0 copies remaining
|
|
^^
|
|
\-- 30 == idle, 43 == printing
|
|
|
|
30 45 6f <- door open
|
|
30 45 50 <- no paper
|
|
|
|
45 == error?
|
|
****************************
|
|
|
|
UNKNOWNS:
|
|
|
|
* How multiple images are stacked for printing on a single page
|
|
(col offset too? write four, then tell PRINT?)
|
|
* How to adjust P95D printer sharpness?
|
|
* Serial number query (iSerial appears bogus)
|
|
* What "custom gamma" table does to spool file?
|
|
|
|
*/
|