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/*
 *   Mitsubishi CP-D90DW Photo Printer CUPS backend
 *
 *   (c) 2019 Solomon Peachy <pizza@shaftnet.org>
 *
 *   The latest version of this program can be found at:
 *
 *     http://git.shaftnet.org/cgit/selphy_print.git
 *
 *   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 3 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, see <https://www.gnu.org/licenses/>.
 *
 *   SPDX-License-Identifier: GPL-3.0+
 *
 */

#define BACKEND mitsud90_backend

#include "backend_common.h"
#include "backend_mitsu.h"

#define USB_VID_MITSU       0x06D3
#define USB_PID_MITSU_D90   0x3B60

const char *mitsu70x_media_types(uint8_t brand, uint8_t type);
const char *mitsu70x_temperatures(uint8_t temp);

/* Printer data structures */
#define D90_STATUS_TYPE_MODEL  0x01 // 10, null-terminated ASCII. 'CPD90D'
#define D90_STATUS_TYPE_x02    0x02 // 1, 0x5f ?
#define D90_STATUS_TYPE_FW_0b  0x0b // 8, 34 31 34 42 31 31 a7 de (414D11)
#define D90_STATUS_TYPE_FW_MA  0x0c // 8, 34 31 35 41 38 31 86 bf (415A81)  // MAIN FW
#define D90_STATUS_TYPE_FW_F   0x0d // 8, 34 31 36 41 35 31 dc 8a (416A51)  // FPGA FW
#define D90_STATUS_TYPE_FW_T   0x0e // 8, 34 31 37 45 31 31 e7 e6 (417E11)  // TABLE FW
#define D90_STATUS_TYPE_FW_0f  0x0f // 8, 34 31 38 41 31 32 6c 64 (418A12)
#define D90_STATUS_TYPE_FW_11  0x11 // 8, 34 32 31 51 31 31 74 f2 (421Q11)
#define D90_STATUS_TYPE_FW_ME  0x13 // 8, 34 31 39 45 31 31 15 bf (419E11)  // MECHA FW

#define D90_STATUS_TYPE_ERROR  0x16 // 11 (see below)
#define D90_STATUS_TYPE_MECHA  0x17 // 2  (see below)
#define D90_STATUS_TYPE_x1e    0x1e // 1, power state or time?  (x00)
#define D90_STATUS_TYPE_TEMP   0x1f // 1  (see below)
#define D90_STATUS_TYPE_x22    0x22 // 2,  all 0  (counter?)
#define D90_STATUS_TYPE_x28    0x28 // 2, next jobid? (starts 00 01 at power cycle, increments by 1 for each print)
#define D90_STATUS_TYPE_x29    0x29 // 8,  e0 07 00 00 21 e6 b3 22
#define D90_STATUS_TYPE_MEDIA  0x2a // 10 (see below)
#define D90_STATUS_TYPE_x2b    0x2b // 2,  all 0 (counter?)
#define D90_STATUS_TYPE_x2c    0x2c // 2,  00 56 (counter?)
#define D90_STATUS_TYPE_x65    0x65 // 50, see below
#define D90_STATUS_TYPE_ISER   0x82 // 1,  80 (iserial disabled)
#define D90_STATUS_TYPE_x83    0x83 // 1,  00
#define D90_STATUS_TYPE_x84    0x84 // 1,  00

//#define D90_STATUS_TYPE_x85    0x85 // 2, 00 ?? BE, wait time?
                                    // combined total of 5.

struct mitsud90_fw_resp_single {
	uint8_t  version[6];
	uint16_t csum;
} __attribute__((packed));

struct mitsud90_media_resp {
	uint8_t  hdr[4];  /* e4 47 44 30 */
	struct {
		uint8_t  brand;
		uint8_t  type;
		uint8_t  unk_a[2];
		uint16_t capacity; /* BE */
		uint16_t remain;  /* BE */
		uint8_t  unk_b[2];
	} __attribute__((packed)) media; /* D90_STATUS_TYPE_MEDIA */
} __attribute__((packed));

struct mitsud90_status_resp {
	uint8_t  hdr[4];  /* e4 47 44 30 */
	/* D90_STATUS_TYPE_ERROR */
	uint8_t  code[2]; /* 00 is ok, nonzero is error */
	uint8_t  unk[9];
	/* D90_STATUS_TYPE_MECHA */
	uint8_t  mecha[2];
	/* D90_STATUS_TYPE_TEMP */
	uint8_t  temp;
} __attribute__((packed));

struct mitsud90_info_resp {
	uint8_t  hdr[4];  /* e4 47 44 30 */
	uint8_t  model[10];
	uint8_t  x02;
	struct mitsud90_fw_resp_single fw_vers[7];
	uint8_t  x1e;
	uint8_t  x22[2];
	uint16_t x28;
	uint8_t  x29[8];
	uint8_t  x2b[2];
	uint8_t  x2c[2];
	uint8_t  x65[50];
	uint8_t  iserial;
	uint8_t  x83;
	uint8_t  x84;
} __attribute__((packed));

#define D90_MECHA_STATUS_IDLE         0x00
#define D90_MECHA_STATUS_PRINTING     0x50
#define D90_MECHA_STATUS_INIT         0x80
#define D90_MECHA_STATUS_INIT_FEEDCUT 0x10

#define D90_MECHA_STATUS_PRINT_FEEDING 0x10  // feeding ?
#define D90_MECHA_STATUS_PRINT_PRE_Y   0x21  // pre Y ?
#define D90_MECHA_STATUS_PRINT_Y       0x22  // Y ?
#define D90_MECHA_STATUS_PRINT_PRE_M   0x23  // pre M ?
#define D90_MECHA_STATUS_PRINT_M       0x24  // M ?
#define D90_MECHA_STATUS_PRINT_PRE_C   0x25  // pre C ? guess!
#define D90_MECHA_STATUS_PRINT_C       0x26  // C ?
#define D90_MECHA_STATUS_PRINT_PRE_OC  0x27  // pre OC ? guess!
#define D90_MECHA_STATUS_PRINT_OC      0x28  // O C?
#define D90_MECHA_STATUS_PRINTING_x2f  0x2f  // ??
#define D90_MECHA_STATUS_PRINTING_x38  0x38  // eject ?

#define D90_ERROR_STATUS_OK         0x00
#define D90_ERROR_STATUS_OK_WARMING 0x40
#define D90_ERROR_STATUS_OK_COOLING 0x80
#define D90_ERROR_STATUS_RIBBON     0x21
#define D90_ERROR_STATUS_PAPER      0x22
#define D90_ERROR_STATUS_PAP_RIB    0x23
#define D90_ERROR_STATUS_OPEN       0x29

struct mitsud90_job_query {
	uint8_t  hdr[4];  /* 1b 47 44 31 */
	uint16_t jobid;   /* BE */
};

struct mitsud90_job_resp {
	uint8_t  hdr[4];  /* e4 47 44 31 */
	uint8_t  unk1;
	uint8_t  unk2;
	uint16_t unk3;
};

struct mitsud90_job_hdr {
	uint8_t  hdr[6]; /* 1b 53 50 30 00 33 */
	uint16_t cols;   /* BE */
	uint16_t rows;   /* BE */
	uint8_t  unk[4]; /* 64 00 00 01 */ // XXX 00 01 might be the jobid?
	uint8_t  margincut; /* 1 for enabled, 0 for disabled */
	union {
#if 0
		struct {
			uint8_t  margin;
			uint16_t position;
		} cuts[3] __attribute__((packed));
#endif
		uint8_t cutzero[9];
	} __attribute__((packed));
	uint8_t  zero[24];

/*@x30*/uint8_t  overcoat;
	uint8_t  quality;
	uint8_t  colorcorr;
	uint8_t  sharp_h;
	uint8_t  sharp_v;
	uint8_t  zero_b[5];
	union {
		struct {
			uint16_t pano_on;   /* 0x0001 when pano is on,  */
			uint8_t  pano_tot;  /* 2 or 3 */
			uint8_t  pano_pg;   /* 1, 2, 3 */
			uint16_t pano_rows; /* always 0x097c (BE), ie 2428 ie 8" print */
			uint16_t pano_rows2; /* Always 0x30 less than pano_rows */
			uint16_t pano_zero; /* 0x0000 */
			uint8_t  pano_unk[6];  /* 02 58 00 0c 00 06 */
		} pano __attribute__((packed));
		uint8_t zero_c[16];
	};
	uint8_t zero_d[6];
	uint8_t zero_fill[432];
} __attribute__((packed));

struct mitsud90_plane_hdr {
	uint8_t  hdr[6]; /* 1b 5a 54 01 00 09 */
	uint16_t origin_cols;
	uint16_t origin_rows;
	uint16_t cols;  /* BE */
	uint16_t rows;  /* BE */
	uint8_t  zero_fill[498];
};

struct mitsud90_job_footer {
	uint8_t hdr[4]; /* 1b 42 51 31 */
	uint8_t pad;
	uint8_t seconds; /* 0x05 by default (windows) */
};

struct mitsud90_memcheck {
	uint8_t  hdr[4]; /* 1b 47 44 33 */
	uint8_t  unk[2]; /* 00 33 */
	uint16_t cols;   /* BE */
	uint16_t rows;   /* BE */
	uint8_t  unk_b[4]; /* 64 00 00 01  */
	uint8_t  zero_fill[498];
};

struct mitsud90_memcheck_resp {
	uint8_t  hdr[4];   /* e4 47 44 43 */
	uint8_t  size_bad; /* 0x00 is ok */
	uint8_t  mem_bad;  /* 0x00 is ok */
};

const char *mitsud90_mecha_statuses(const uint8_t *code)
{
	switch (code[0]) {
	case D90_MECHA_STATUS_IDLE:
		return "Idle";
	case D90_MECHA_STATUS_PRINTING:
		switch (code[1]) {
		case D90_MECHA_STATUS_PRINT_FEEDING:
			return "Feeding Media";
		case D90_MECHA_STATUS_PRINT_PRE_Y:
		case D90_MECHA_STATUS_PRINT_Y:
			return "Printing Yellow";
		case D90_MECHA_STATUS_PRINT_PRE_M:
		case D90_MECHA_STATUS_PRINT_M:
			return "Printing Magenta";
		case D90_MECHA_STATUS_PRINT_PRE_C:
		case D90_MECHA_STATUS_PRINT_C:
			return "Printing Cyan";
		case D90_MECHA_STATUS_PRINT_PRE_OC:
		case D90_MECHA_STATUS_PRINT_OC:
			return "Applying Overcoat";
		case D90_MECHA_STATUS_PRINTING_x2f:
		case D90_MECHA_STATUS_PRINTING_x38:
			return "Ejecting Media?";
		default:
			return "Printing (Unknown)";
		}
	case D90_MECHA_STATUS_INIT:
		if (code[1] == D90_MECHA_STATUS_INIT_FEEDCUT)
			return "Feed & Cut paper";
		else
			return "Initializing";
	default:
		return "Unknown";
	}
}

const char *mitsud90_error_codes(const uint8_t *code)
{
	switch(code[0]) {
	case D90_ERROR_STATUS_OK:
		if (code[1] & D90_ERROR_STATUS_OK_WARMING)
			return "Heating";
		else if (code[1] & D90_ERROR_STATUS_OK_COOLING)
			return "Cooling Down";
		else
			return "Idle";
	case D90_ERROR_STATUS_RIBBON:
		switch (code[1]) {
		case 0x00:
			return "Ribbon exhausted";
		case 0x10:
			return "Insufficient remaining ribbon";
		case 0x20:
			return "Ribbon Cue Timeout";
		case 0x30:
			return "Cannot Cue Ribbon";
		case 0x90:
			return "No ribbon";
		default:
			return "Unknown Ribbon Error";
		}
	case D90_ERROR_STATUS_PAPER:
		switch (code[1]) {
		case 0x00:
			return "No paper";
		case 0x02:
			return "Paper exhausted";
		default:
			return "Unknown Paper Error";
		}
	case D90_ERROR_STATUS_PAP_RIB:
		switch (code[1]) {
		case 0x00:
			return "Ribbon/Paper mismatch";
		case 0x90:
			return "Ribbon/Job mismatch";
		default:
			return "Unknown ribbon match error";
		}
	case 0x26:
		return "Illegal Ribbon";
	case 0x28:
		return "Cut Bin Missing";
	case D90_ERROR_STATUS_OPEN:
		switch (code[1]) {
		case 0x00:
			return "Printer Open during Stop";
		case 0x10:
			return "Printer Open during Initialization";
		case 0x90:
			return "Printer Open during Printing";
		default:
			return "Unknown Door error";
		}
	case 0x2f:
		return "Printer turned off during printing";
	case 0x31:
		return "Ink feed stop";
	case 0x32:
		return "Ink Skip 1 timeout";
	case 0x33:
		return "Ink Skip 2 timeout";
	case 0x34:
		return "Ink Sticking";
	case 0x35:
		return "Ink return stop";
	case 0x36:
		return "Ink Rewind timeout";
	case 0x37:
		return "Winding sensing error";
	case 0x40:
	case 0x41:
	case 0x42:
	case 0x43:
	case 0x44:
		return "Paper Jam";
	case 0x60:
		if (code[1] == 0x20)
			return "Preheat error";
		else if (code[1] == 0x04)
			return "Humidity sensor error";
		else if (code[1] & 0x1f)
			return "Thermistor error";
		else
			return "Unknown error";
	case 0x61:
		if (code[1] == 0x00)
			return "Color Sensor Error";
		else if (code[1] & 0x10)
			return "Matte OP Error";
		else
			return "Unknown error";
	case 0x62:
		return "Data Transfer error";
	case 0x63:
		return "EEPROM error";
	case 0x64:
		return "Flash access error";
	case 0x65:
		return "FPGA configuration error";
	case 0x66:
		return "Power voltage Error";
	case 0x67:
		return "RFID access error";
	case 0x68:
		if (code[1] == 0x00)
			return "Fan Lock Error";
		else if (code[1] == 0x90)
			return "MDA Error";
		else
			return "Unknown error";
	case 0x69:
		if (code[1] == 0x10)
			return "DDR Error";
		else if (code[1] == 0x00)
			return "Firmware Error";
		else
			return "Unknown error";
	case 0x70:
	case 0x71:
	case 0x73:
	case 0x75:
		return "Mechanical Error (check ribbon and power cycle)";
	case 0x82:
		return "USB Timeout";
	case 0x83:
		return "Illegal paper size";
	case 0x84:
		return "Illegal parameter";
	case 0x85:
		return "Job Cancel";
	case 0x89:
		return "Last Job Error";
	default:
		return "Unknown";
	}
}

static void mitsud90_dump_status(struct mitsud90_status_resp *resp)
{
	INFO("Error Status: %s (%02x %02x) -- %02x %02x %02x %02x  %02x %02x %02x %02x  %02x\n",
	     mitsud90_error_codes(resp->code),
	     resp->code[0], resp->code[1],
	     resp->unk[0], resp->unk[1], resp->unk[2], resp->unk[3],
	     resp->unk[4], resp->unk[5], resp->unk[6], resp->unk[7],
	     resp->unk[8]);
	INFO("Printer Status: %s (%02x %02x)\n",
	     mitsud90_mecha_statuses(resp->mecha),
	     resp->mecha[0], resp->mecha[1]);
	INFO("Temperature Status: %s\n",
	     mitsu70x_temperatures(resp->temp));
}

/* Private data structure */
struct mitsud90_printjob {
	uint8_t *databuf;
	uint32_t datalen;
	int copies;
};

struct mitsud90_ctx {
	struct libusb_device_handle *dev;
	uint8_t endp_up;
	uint8_t endp_down;

	int type;
	char serno[7];

	/* Used in parsing.. */
	struct mitsud90_job_footer holdover;
	int holdover_on;

	struct marker marker;
};

static int mitsud90_query_media(struct mitsud90_ctx *ctx, struct mitsud90_media_resp *resp)
{
	uint8_t cmdbuf[8];
	int ret, num;

	cmdbuf[0] = 0x1b;
	cmdbuf[1] = 0x47;
	cmdbuf[2] = 0x44;
	cmdbuf[3] = 0x30;
	cmdbuf[4] = 0;
	cmdbuf[5] = 0;
	cmdbuf[6] = 0x01;  /* Number of commands */
	cmdbuf[7] = D90_STATUS_TYPE_MEDIA;

	if ((ret = send_data(ctx->dev, ctx->endp_down,
			     cmdbuf, sizeof(cmdbuf))))
		return ret;
	memset(resp, 0, sizeof(*resp));

	ret = read_data(ctx->dev, ctx->endp_up,
			(uint8_t*) resp, sizeof(*resp), &num);

	if (ret < 0)
		return ret;
	if (num != sizeof(*resp)) {
		ERROR("Short Read! (%d/%d)\n", num, (int)sizeof(*resp));
		return 4;
	}

	return CUPS_BACKEND_OK;
}

static int mitsud90_query_status(struct mitsud90_ctx *ctx, struct mitsud90_status_resp *resp)
{
	uint8_t cmdbuf[10];
	int ret, num;

	cmdbuf[0] = 0x1b;
	cmdbuf[1] = 0x47;
	cmdbuf[2] = 0x44;
	cmdbuf[3] = 0x30;
	cmdbuf[4] = 0;
	cmdbuf[5] = 0;
	cmdbuf[6] = 0x03;  /* Number of commands */
	cmdbuf[7] = D90_STATUS_TYPE_ERROR;
	cmdbuf[8] = D90_STATUS_TYPE_MECHA;
	cmdbuf[9] = D90_STATUS_TYPE_TEMP;

	if ((ret = send_data(ctx->dev, ctx->endp_down,
			     cmdbuf, sizeof(cmdbuf))))
		return ret;
	memset(resp, 0, sizeof(*resp));

	ret = read_data(ctx->dev, ctx->endp_up,
			(uint8_t*) resp, sizeof(*resp), &num);

	if (ret < 0)
		return ret;
	if (num != sizeof(*resp)) {
		ERROR("Short Read! (%d/%d)\n", num, (int)sizeof(*resp));
		return 4;
	}

	return CUPS_BACKEND_OK;
}

static int mitsud90_get_serno(struct mitsud90_ctx *ctx)
{
	uint8_t cmdbuf[32];
	int ret, num;

	/* Send Request */
	cmdbuf[0] = 0x1b;
	cmdbuf[1] = 0x61;
	cmdbuf[2] = 0x36;
	cmdbuf[3] = 0x36;
	cmdbuf[4] = 0x41;
	cmdbuf[5] = 0xbe;
	cmdbuf[6] = 0x00;
	cmdbuf[7] = 0x00;

	cmdbuf[8] = 0x00;
	cmdbuf[9] = 0x06;
	cmdbuf[10] = 0x00;
	cmdbuf[11] = 0x00;
	cmdbuf[12] = 0x00;
	cmdbuf[13] = 0x30;
	cmdbuf[14] = 0xff;
	cmdbuf[15] = 0xff;

	cmdbuf[16] = 0xff;
	cmdbuf[17] = 0xf9;
	cmdbuf[18] = 0xff;
	cmdbuf[19] = 0xff;
	cmdbuf[20] = 0xff;
	cmdbuf[21] = 0xcf;

	if ((ret = send_data(ctx->dev, ctx->endp_down,
			     cmdbuf, 22)))
		return ret;

	ret = read_data(ctx->dev, ctx->endp_up,
			cmdbuf, sizeof(cmdbuf), &num);

	/* Store it */
	memcpy(ctx->serno, &cmdbuf[22], 6);
	ctx->serno[6] = 0;

	return ret;
}

/* Generic functions */

static void *mitsud90_init(void)
{
	struct mitsud90_ctx *ctx = malloc(sizeof(struct mitsud90_ctx));
	if (!ctx) {
		ERROR("Memory Allocation Failure!\n");
		return NULL;
	}
	memset(ctx, 0, sizeof(struct mitsud90_ctx));

	return ctx;
}

static int mitsud90_attach(void *vctx, struct libusb_device_handle *dev, int type,
			   uint8_t endp_up, uint8_t endp_down, int iface, uint8_t jobid)
{
	struct mitsud90_ctx *ctx = vctx;
	struct mitsud90_media_resp resp;

	UNUSED(jobid);
	UNUSED(iface);

	ctx->dev = dev;
	ctx->endp_up = endp_up;
	ctx->endp_down = endp_down;
	ctx->type = type;

	if (test_mode < TEST_MODE_NOATTACH) {
		if (mitsud90_query_media(ctx, &resp))
			return CUPS_BACKEND_FAILED;
		if (mitsud90_get_serno(ctx))
			return CUPS_BACKEND_FAILED;
	} else {
		resp.media.brand = 0xff;
		resp.media.type = 0x0f;
		resp.media.capacity = cpu_to_be16(230);
		resp.media.remain = cpu_to_be16(200);
	}

	ctx->marker.color = "#00FFFF#FF00FF#FFFF00";
	ctx->marker.numtype = resp.media.type;
	ctx->marker.name = mitsu70x_media_types(resp.media.brand, resp.media.type);
	ctx->marker.levelmax = be16_to_cpu(resp.media.capacity);
	ctx->marker.levelnow = be16_to_cpu(resp.media.remain);

	return CUPS_BACKEND_OK;
}

static void mitsud90_cleanup_job(const void *vjob)
{
	const struct mitsud90_printjob *job = vjob;

	if (job->databuf)
		free(job->databuf);

	free((void*)job);
}

static int mitsud90_read_parse(void *vctx, const void **vjob, int data_fd, int copies) {
	struct mitsud90_ctx *ctx = vctx;
	int i, remain;
	struct mitsud90_job_hdr *hdr;

	struct mitsud90_printjob *job;;

	if (!ctx)
		return CUPS_BACKEND_FAILED;

	job = malloc(sizeof(*job));
	if (!job) {
		ERROR("Memory allocation failure!\n");
		return CUPS_BACKEND_RETRY_CURRENT;
	}
	memset(job, 0, sizeof(*job));
	job->copies = copies;

	/* Just allocate a worst-case buffer */
	job->datalen = 0;
	job->databuf = malloc(sizeof(struct mitsud90_job_hdr) +
			      sizeof(struct mitsud90_plane_hdr) +
			      sizeof(struct mitsud90_job_footer) +
			      1852*2729*3);
	if (!job->databuf) {
		ERROR("Memory allocation failure!\n");
		mitsud90_cleanup_job(job);
		return CUPS_BACKEND_RETRY_CURRENT;
	}

	/* Make sure there's no holdover */
	if (ctx->holdover_on) {
		memcpy(job->databuf, &ctx->holdover, sizeof(ctx->holdover));
		job->datalen += sizeof(ctx->holdover);
		ctx->holdover_on = 0;
	}

	/* Read in first header. */
	remain = sizeof(struct mitsud90_job_hdr) - job->datalen;
	while (remain) {
		i = read(data_fd, (job->databuf + job->datalen), remain);
		if (i == 0) {
			mitsud90_cleanup_job(job);
			return CUPS_BACKEND_CANCEL;
		}
		if (i < 0) {
			mitsud90_cleanup_job(job);
			return CUPS_BACKEND_CANCEL;
		}
		remain -= i;
		job->datalen += i;
	}

	/* Sanity check header */
	hdr = (struct mitsud90_job_hdr *) job->databuf;
	if (hdr->hdr[0] != 0x1b ||
	    hdr->hdr[1] != 0x53 ||
	    hdr->hdr[2] != 0x50 ||
	    hdr->hdr[3] != 0x30 ) {
		ERROR("Unrecognized data format (%02x%02x%02x%02x)!\n",
		      hdr->hdr[0], hdr->hdr[1], hdr->hdr[2], hdr->hdr[3]);
		mitsud90_cleanup_job(job);
		return CUPS_BACKEND_CANCEL;
	}

	/* Now read in the rest */
	remain = sizeof(struct mitsud90_plane_hdr) + be16_to_cpu(hdr->cols) * be16_to_cpu(hdr->rows) * 3;
	while(remain) {
		i = read(data_fd, job->databuf + job->datalen, remain);
		if (i == 0) {
			mitsud90_cleanup_job(job);
			return CUPS_BACKEND_CANCEL;
		}
		if (i < 0) {
			mitsud90_cleanup_job(job);
			return CUPS_BACKEND_CANCEL;
		}
		job->datalen += i;
		remain -= i;
	}

	/* Read in the footer.  Hopefully. */
	remain = sizeof(struct mitsud90_job_footer);
	i = read(data_fd, job->databuf + job->datalen, remain);
	if (i == 0) {
		mitsud90_cleanup_job(job);
		return CUPS_BACKEND_CANCEL;
	}
	if (i < 0) {
		mitsud90_cleanup_job(job);
		return CUPS_BACKEND_CANCEL;
	}

	/* See if this is a job footer.  If it is, keep, else holdover. */
	if (job->databuf[job->datalen + 0] != 0x1b ||
	    job->databuf[job->datalen + 1] != 0x42 ||
	    job->databuf[job->datalen + 2] != 0x51 ||
	    job->databuf[job->datalen + 3] != 0x31) {
		memcpy(&ctx->holdover, job->databuf + job->datalen, sizeof(struct mitsud90_job_footer));
	        ctx->holdover_on = 1;
	} else {
		job->datalen += i;
		ctx->holdover_on = 0;
	}

	/* Sanity check */
	if (hdr->pano.pano_on) {
		ERROR("Unable to handle panorama jobs yet\n");
		mitsud90_cleanup_job(job);
		return CUPS_BACKEND_CANCEL;
	}

	*vjob = job;

	return CUPS_BACKEND_OK;
}

static int mitsud90_main_loop(void *vctx, const void *vjob) {
	struct mitsud90_ctx *ctx = vctx;
	struct mitsud90_job_hdr *hdr;
	struct mitsud90_status_resp resp;
	uint8_t last_status[2] = {0xff, 0xff};

	int sent;
	int ret;
	int copies;

	const struct mitsud90_printjob *job = vjob;

	if (!ctx)
		return CUPS_BACKEND_FAILED;
	if (!job)
		return CUPS_BACKEND_FAILED;
	copies = job->copies;

	hdr = (struct mitsud90_job_hdr*) job->databuf;

	INFO("Waiting for printer idle...\n");

top:
	sent = 0;

	// XXX Figure out if printer is asleep, and wake it up if necessary.

	/* Query status, wait for idle or error out */
	do {
		if (mitsud90_query_status(ctx, &resp))
			return CUPS_BACKEND_FAILED;

		if (resp.code[0] != D90_ERROR_STATUS_OK) {
			ERROR("Printer reported error condition: %s (%02x %02x)\n",
			      mitsud90_error_codes(resp.code), resp.code[0], resp.code[1]);
			return CUPS_BACKEND_STOP;
		}

		if (resp.code[1] & D90_ERROR_STATUS_OK_WARMING ||
		    resp.temp & D90_ERROR_STATUS_OK_WARMING ) {
			INFO("Printer warming up\n");
			sleep(1);
			continue;
		}
		if (resp.code[1] & D90_ERROR_STATUS_OK_COOLING ||
			   resp.temp & D90_ERROR_STATUS_OK_COOLING) {
			INFO("Printer cooling down\n");
			sleep(1);
			continue;
		}

		if (resp.mecha[0] != last_status[0] ||
		    resp.mecha[1] != last_status[1]) {
			INFO("Printer status: %s\n",
			     mitsud90_mecha_statuses(resp.mecha));
			last_status[0] = resp.mecha[0];
			last_status[1] = resp.mecha[1];
		}

		if (resp.mecha[0] == D90_MECHA_STATUS_IDLE) {
			break;
			// we don't have to wait until idle, just
			// until we have free buffers.  Don't know how
			// to check this though.. XXXX
		}
	} while(1);


	/* Send memory check */
	{
		struct mitsud90_memcheck mem;
		struct mitsud90_memcheck_resp mem_resp;
		int num;

		memcpy(&mem, hdr, sizeof(mem));
		mem.hdr[0] = 0x1b;
		mem.hdr[1] = 0x47;
		mem.hdr[2] = 0x44;
		mem.hdr[3] = 0x33;

		if ((ret = send_data(ctx->dev, ctx->endp_down,
				     (uint8_t*) &mem, sizeof(mem))))
			return CUPS_BACKEND_FAILED;

		ret = read_data(ctx->dev, ctx->endp_up,
				(uint8_t*)&mem_resp, sizeof(mem_resp), &num);

		if (ret < 0)
			return ret;
		if (num != sizeof(mem_resp)) {
			ERROR("Short Read! (%d/%d)\n", num, (int)sizeof(mem_resp));
			return 4;
		}
		if (mem_resp.size_bad || mem_resp.mem_bad == 0xff) {
			ERROR("Printer reported bad print params (%02x)\n", mem_resp.size_bad);
			return CUPS_BACKEND_CANCEL;
		}
		if (mem_resp.mem_bad) {
			ERROR("Printer buffers full, retrying!\n");
			sleep(1);
			goto top;
		}
	}

	/* Send header */
	if ((ret = send_data(ctx->dev, ctx->endp_down,
			     job->databuf + sent, sizeof(*hdr))))
		return CUPS_BACKEND_FAILED;
	sent += sizeof(*hdr);

	/* Send Plane header */
	if ((ret = send_data(ctx->dev, ctx->endp_down,
			     job->databuf + sent, sizeof(*hdr))))
		return CUPS_BACKEND_FAILED;
	sent += sizeof(*hdr);

	/* Send payload + footer */
	if ((ret = send_data(ctx->dev, ctx->endp_down,
			     job->databuf + sent, job->datalen - sent)))
		return CUPS_BACKEND_FAILED;
//	sent += (job->datalen - sent);

	/* Wait for completion */
	do {
		sleep(1);

		if (mitsud90_query_status(ctx, &resp))
			return CUPS_BACKEND_FAILED;

		if (resp.code[0] != D90_ERROR_STATUS_OK) {
			ERROR("Printer reported error condition: %s (%02x %02x)\n",
			      mitsud90_error_codes(resp.code), resp.code[0], resp.code[1]);
			return CUPS_BACKEND_STOP;
		}

		if (resp.mecha[0] != last_status[0] ||
		    resp.mecha[1] != last_status[1]) {
			INFO("Printer status: %s\n",
			     mitsud90_mecha_statuses(resp.mecha));
			last_status[0] = resp.mecha[0];
			last_status[1] = resp.mecha[1];
		}

		/* Terminate when printing complete */
		if (resp.mecha[0] == D90_MECHA_STATUS_IDLE) {
			break;
		}

		if (fast_return && copies <= 1) { /* Copies generated by backend? */
			INFO("Fast return mode enabled.\n");
			break;
		}
	} while(1);

	/* Clean up */
	if (terminate)
		copies = 1;

	INFO("Print complete (%d copies remaining)\n", copies - 1);

	if (copies && --copies) {
		goto top;
	}

	return CUPS_BACKEND_OK;
}

static int mitsud90_query_job(struct mitsud90_ctx *ctx, uint16_t jobid,
	struct mitsud90_job_resp *resp)
{
	struct mitsud90_job_query req;
	int ret, num;

	req.hdr[0] = 0x1b;
	req.hdr[1] = 0x47;
	req.hdr[2] = 0x44;
	req.hdr[3] = 0x31;
	req.jobid = cpu_to_be16(jobid);

	if ((ret = send_data(ctx->dev, ctx->endp_down,
			     (uint8_t*) &req, sizeof(req))))
		return ret;
	memset(resp, 0, sizeof(*resp));
	ret = read_data(ctx->dev, ctx->endp_up,
			(uint8_t*) resp, sizeof(*resp), &num);

	if (ret < 0)
		return ret;
	if (num != sizeof(*resp)) {
		ERROR("Short Read! (%d/%d)\n", num, (int)sizeof(*resp));
		return 4;
	}

	return CUPS_BACKEND_OK;
}

static int mitsud90_get_jobstatus(struct mitsud90_ctx *ctx, uint16_t jobid)
{
	struct mitsud90_job_resp resp;

	if (mitsud90_query_job(ctx, jobid, &resp))
		return CUPS_BACKEND_FAILED;

	INFO("Job Status:  %04x = %02x/%02x/%04x\n",
	     jobid, resp.unk1, resp.unk2, be16_to_cpu(resp.unk3));

	return CUPS_BACKEND_OK;
}

static int mitsud90_get_media(struct mitsud90_ctx *ctx)
{
	struct mitsud90_media_resp resp;

	if (mitsud90_query_media(ctx, &resp))
		return CUPS_BACKEND_FAILED;

	INFO("Media Type:  %s (%02x/%02x)\n",
	     mitsu70x_media_types(resp.media.brand, resp.media.type),
	     resp.media.brand,
	     resp.media.type);
	INFO("Prints Remaining:  %03d/%03d\n",
	     be16_to_cpu(resp.media.remain),
	     be16_to_cpu(resp.media.capacity));

	return CUPS_BACKEND_OK;
}

static int mitsud90_get_status(struct mitsud90_ctx *ctx)
{
	struct mitsud90_status_resp resp;

	if (mitsud90_query_status(ctx, &resp))
		return CUPS_BACKEND_FAILED;

	mitsud90_dump_status(&resp);

	return CUPS_BACKEND_OK;
}

static int mitsud90_get_info(struct mitsud90_ctx *ctx)
{
	uint8_t cmdbuf[26];
	int ret, num;
	struct mitsud90_info_resp resp;

	cmdbuf[0] = 0x1b;
	cmdbuf[1] = 0x47;
	cmdbuf[2] = 0x44;
	cmdbuf[3] = 0x30;
	cmdbuf[4] = 0;
	cmdbuf[5] = 0;
	cmdbuf[6] = 19;  /* Number of commands */

	cmdbuf[7] = D90_STATUS_TYPE_MODEL;
	cmdbuf[8] = D90_STATUS_TYPE_x02;
	cmdbuf[9] = D90_STATUS_TYPE_FW_0b;
	cmdbuf[10] = D90_STATUS_TYPE_FW_MA;

	cmdbuf[11] = D90_STATUS_TYPE_FW_F;
	cmdbuf[12] = D90_STATUS_TYPE_FW_T;
	cmdbuf[13] = D90_STATUS_TYPE_FW_0f;
	cmdbuf[14] = D90_STATUS_TYPE_FW_11;

	cmdbuf[15] = D90_STATUS_TYPE_FW_ME;
	cmdbuf[16] = D90_STATUS_TYPE_x1e;
	cmdbuf[17] = D90_STATUS_TYPE_x22;
	cmdbuf[18] = D90_STATUS_TYPE_x28;

	cmdbuf[19] = D90_STATUS_TYPE_x29;
	cmdbuf[20] = D90_STATUS_TYPE_x2b;
	cmdbuf[21] = D90_STATUS_TYPE_x2c;
	cmdbuf[22] = D90_STATUS_TYPE_x65;

	cmdbuf[23] = D90_STATUS_TYPE_ISER;
	cmdbuf[24] = D90_STATUS_TYPE_x83;
	cmdbuf[25] = D90_STATUS_TYPE_x84;

	if ((ret = send_data(ctx->dev, ctx->endp_down,
			     cmdbuf, sizeof(cmdbuf))))
		return ret;
	memset(&resp, 0, sizeof(resp));

	ret = read_data(ctx->dev, ctx->endp_up,
			(uint8_t*) &resp, sizeof(resp), &num);

	if (ret < 0)
		return ret;
	if (num != sizeof(resp)) {
		ERROR("Short Read! (%d/%d)\n", num, (int)sizeof(resp));
		return 4;
	}

	/* start dumping output */
	memset(cmdbuf, 0, sizeof(cmdbuf));
	memcpy(cmdbuf, resp.model, sizeof(resp.model));
	INFO("Model: %s\n", (char*)cmdbuf);
	INFO("Serial: %s\n", ctx->serno);
	for (num = 0; num < 7 ; num++) {
		memset(cmdbuf, 0, sizeof(cmdbuf));
		memcpy(cmdbuf, resp.fw_vers[num].version, sizeof(resp.fw_vers[num].version));
		INFO("FW Component %02d: %s (%04x)\n",
		     num, cmdbuf, be16_to_cpu(resp.fw_vers[num].csum));
	}
	INFO("TYPE_02: %02x\n", resp.x02);
	INFO("TYPE_1e: %02x\n", resp.x1e);
	INFO("TYPE_22: %02x %02x\n", resp.x22[0], resp.x22[1]);
	INFO("TYPE_28: %04x\n", be16_to_cpu(resp.x28));
	INFO("TYPE_29: %02x %02x %02x %02x %02x %02x %02x %02x\n",
	     resp.x29[0], resp.x29[1], resp.x29[2], resp.x29[3],
	     resp.x29[4], resp.x29[5], resp.x29[6], resp.x29[7]);
	INFO("TYPE_2b: %02x %02x\n", resp.x2b[0], resp.x2b[1]);
	INFO("TYPE_2c: %02x %02x\n", resp.x2c[0], resp.x2c[1]);

	INFO("TYPE_65:");
	for (num = 0; num < 50 ; num++) {
		DEBUG2(" %02x", resp.x65[num]);
	}
	DEBUG2("\n");
	INFO("iSerial: %s\n", resp.iserial ? "Disabled" : "Enabled");
	INFO("TYPE_83: %02x\n", resp.x83);
	INFO("TYPE_84: %02x\n", resp.x84);

	// XXX what about resume, wait time, "cut limit", sleep time ?

	return CUPS_BACKEND_OK;
}

static int mitsud90_dumpall(struct mitsud90_ctx *ctx)
{
	int i;
	uint8_t cmdbuf[8];
	uint8_t buf[256];

	cmdbuf[0] = 0x1b;
	cmdbuf[1] = 0x47;
	cmdbuf[2] = 0x44;
	cmdbuf[3] = 0x30;
	cmdbuf[4] = 0;
	cmdbuf[5] = 0;
	cmdbuf[6] = 0x01;  /* Number of commands */

	for (i = 0 ; i < 256 ; i++) {
		int num, ret;

		cmdbuf[7] = i;

		if ((ret = send_data(ctx->dev, ctx->endp_down,
				     cmdbuf, sizeof(cmdbuf))))
			return ret;
		memset(buf, 0, sizeof(buf));

		ret = read_data(ctx->dev, ctx->endp_up,
				buf, sizeof(buf), &num);

		if (ret < 0)
			continue;

		if (num > 4) {
			DEBUG("TYPE %02x LEN: %d\n", i, num - 4);
			DEBUG("<--");
			for (ret = 4; ret < num ; ret ++) {
				DEBUG2(" %02x", buf[ret]);
			}
			DEBUG2("\n");
		}
	}

	return CUPS_BACKEND_OK;
}

static int mitsud90_query_serno(struct libusb_device_handle *dev, uint8_t endp_up, uint8_t endp_down, int iface, char *buf, int buf_len)
{
	struct mitsud90_ctx ctx = {
		.dev = dev,
		.endp_up = endp_up,
		.endp_down = endp_down
	};

	int ret;

	UNUSED(iface);
	UNUSED(buf_len);

	ret = mitsud90_get_serno(&ctx);

	/* Copy it */
	memcpy(buf, ctx.serno, sizeof(ctx.serno));

	return ret;
}
static int mitsud90_set_iserial(struct mitsud90_ctx *ctx, uint8_t enabled)
{
	uint8_t cmdbuf[23];
	int ret, num;

	enabled = (enabled) ? 0: 0x80;

	/* Send Parameter.. */
	cmdbuf[0] = 0x1b;
	cmdbuf[1] = 0x31;
	cmdbuf[2] = 0x36;
	cmdbuf[3] = 0x30;
	cmdbuf[4] = 0x41;
	cmdbuf[5] = 0xbe;
	cmdbuf[6] = 0x00;
	cmdbuf[7] = 0x00;

	cmdbuf[8] = 0x00;
	cmdbuf[9] = 0x01;
	cmdbuf[10] = 0x00;
	cmdbuf[11] = 0x00;
	cmdbuf[12] = 0x00;
	cmdbuf[13] = 0x11;
	cmdbuf[14] = 0xff;
	cmdbuf[15] = 0xff;

	cmdbuf[16] = 0xff;
	cmdbuf[17] = 0xfe;
	cmdbuf[18] = 0xff;
	cmdbuf[19] = 0xff;
	cmdbuf[20] = 0xff;
	cmdbuf[21] = 0xfe;
	cmdbuf[22] = enabled;

	if ((ret = send_data(ctx->dev, ctx->endp_down,
			     cmdbuf, sizeof(cmdbuf))))
		return ret;

	ret = read_data(ctx->dev, ctx->endp_up,
			cmdbuf, sizeof(cmdbuf), &num);

	return ret;
}

static int mitsud90_set_sleeptime(struct mitsud90_ctx *ctx, uint16_t time)
{
	uint8_t cmdbuf[24];
	int ret;

	/* 255 minutes max, according to RE work */
	if (time > 255)
		time = 255;

	/* Send Parameter.. */
	cmdbuf[0] = 0x1b;
	cmdbuf[1] = 0x31;
	cmdbuf[2] = 0x36;
	cmdbuf[3] = 0x30;
	cmdbuf[4] = 0x41;
	cmdbuf[5] = 0xbe;
	cmdbuf[6] = 0x00;
	cmdbuf[7] = 0x00;

	cmdbuf[8] = 0x00;
	cmdbuf[9] = 0x02;
	cmdbuf[10] = 0x00;
	cmdbuf[11] = 0x00;
	cmdbuf[12] = 0x05;
	cmdbuf[13] = 0x02;
	cmdbuf[14] = 0xff;
	cmdbuf[15] = 0xff;

	cmdbuf[16] = 0xff;
	cmdbuf[17] = 0xfd;
	cmdbuf[18] = 0xff;
	cmdbuf[19] = 0xff;
	cmdbuf[20] = 0xfa;
	cmdbuf[21] = 0xff;
	cmdbuf[22] = (time >> 8) & 0xff;
	cmdbuf[23] = time & 0xff;

	if ((ret = send_data(ctx->dev, ctx->endp_down,
			     cmdbuf, 4)))
		return ret;

	/* No response */

	return CUPS_BACKEND_OK;
}

static void mitsud90_cmdline(void)
{
	DEBUG("\t\t[ -i ]           # Query printer info\n");
	DEBUG("\t\t[ -j jobid ]     # Query job status\n");
	DEBUG("\t\t[ -k time ]      # Set sleep time in minutes\n");
	DEBUG("\t\t[ -m ]           # Query printer media\n");
	DEBUG("\t\t[ -s ]           # Query printer status\n");
	DEBUG("\t\t[ -x 0|1 ]       # Enable/disable iSerial reporting\n");
//	DEBUG("\t\t[ -Z ]           # Dump all parameters\n");
}

static int mitsud90_cmdline_arg(void *vctx, int argc, char **argv)
{
	struct mitsud90_ctx *ctx = vctx;
	int i, j = 0;

	if (!ctx)
		return -1;

	while ((i = getopt(argc, argv, GETOPT_LIST_GLOBAL "ij:k:msx:Z")) >= 0) {
		switch(i) {
		GETOPT_PROCESS_GLOBAL
		case 'i':
			j = mitsud90_get_info(ctx);
			break;
		case 'j':
			j = mitsud90_get_jobstatus(ctx, atoi(optarg));
			break;
		case 'k':
			j = mitsud90_set_sleeptime(ctx, atoi(optarg));
			break;
		case 'm':
			j = mitsud90_get_media(ctx);
			break;
		case 's':
			j = mitsud90_get_status(ctx);
			break;
		case 'x':
			j = mitsud90_set_iserial(ctx, atoi(optarg));
			break;
		case 'Z':
			j = mitsud90_dumpall(ctx);
			break;
		default:
			break;  /* Ignore completely */
		}

		if (j) return j;
	}

	return CUPS_BACKEND_OK;
}

static int mitsud90_query_markers(void *vctx, struct marker **markers, int *count)
{
	struct mitsud90_ctx *ctx = vctx;
	struct mitsud90_media_resp resp;

	if (markers) *markers = &ctx->marker;
	if (count) *count = 1;

	if (mitsud90_query_media(ctx, &resp))
		return CUPS_BACKEND_FAILED;

	ctx->marker.levelnow = be16_to_cpu(resp.media.remain);

	return CUPS_BACKEND_OK;
}

static int mitsud90_query_stats(void *vctx, struct printerstats *stats)
{
	struct mitsud90_ctx *ctx = vctx;
	struct mitsud90_status_resp resp;

	if (mitsud90_query_markers(ctx, NULL, NULL))
		return CUPS_BACKEND_FAILED;
	if (mitsud90_query_status(ctx, &resp))
		return CUPS_BACKEND_FAILED;

	stats->mfg = "Mitsubishi";
	stats->model = "CP-D90DW";
	stats->serial = ctx->serno;

	// stats->fwver = ctx->fwver; // XXX use resp.fw_vers[0] aka MAIN FW
	stats->decks = 1;

	stats->name[0] = "Roll";
	if (resp.code[0] != D90_ERROR_STATUS_OK)
		stats->status[0] = strdup(mitsud90_error_codes(resp.code));
	else if (resp.code[1] & D90_ERROR_STATUS_OK_WARMING ||
		 resp.temp & D90_ERROR_STATUS_OK_WARMING)
		stats->status[0] = strdup("Warming up");
	else if (resp.code[1] & D90_ERROR_STATUS_OK_COOLING ||
		 resp.temp & D90_ERROR_STATUS_OK_COOLING)
		stats->status[0] = strdup("Cooling down");
	else
		stats->status[0] = strdup(mitsud90_mecha_statuses(resp.mecha));

	stats->mediatype[0] = ctx->marker.name;
	stats->levelmax[0] = ctx->marker.levelmax;
	stats->levelnow[0] = ctx->marker.levelnow;
	// stats->cnt_life[0] = ??? // XXX Don't know about any counters yet.

	return CUPS_BACKEND_OK;
}

static const char *mitsud90_prefixes[] = {
	"mitsud90", /* Family Name */
	NULL
};

/* Exported */
struct dyesub_backend mitsud90_backend = {
	.name = "Mitsubishi CP-D90DW",
	.version = "0.17"  " (lib " LIBMITSU_VER ")",
	.uri_prefixes = mitsud90_prefixes,
	.cmdline_arg = mitsud90_cmdline_arg,
	.cmdline_usage = mitsud90_cmdline,
	.init = mitsud90_init,
	.attach = mitsud90_attach,
	.cleanup_job = mitsud90_cleanup_job,
	.read_parse = mitsud90_read_parse,
	.main_loop = mitsud90_main_loop,
	.query_serno = mitsud90_query_serno,
	.query_markers = mitsud90_query_markers,
	.query_stats = mitsud90_query_stats,
	.devices = {
		{ USB_VID_MITSU, USB_PID_MITSU_D90, P_MITSU_D90, NULL, "mitsubishi-d90dw"},
		{ 0, 0, 0, NULL, NULL}
	}
};

/*
   Mitsubishi CP-D90DW data format

   All multi-byte values are BIG endian

 [[HEADER 1]]

   1b 53 50 30 00 33 XX XX  YY YY 64 00 00 01 MM ??  XX XX == COLS, YY XX ROWS (BE)
   ?? ?? ?? ?? ?? ?? ?? ??  00 00 00 00 00 00 00 00  <-- cut position, see below
   00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  MM == 0 for no margin cut, 1 for margin cut
   QQ RR SS HH VV 00 00 00  00 00 01 00 03 II 09 7c  QQ == 02 matte, 00 glossy,
   09 4c 00 00 02 58 00 0c  00 06                    RR == 00 auto, 03 == fine, 02 == superfine.
                                                     SS == 00 colorcorr, 01 == none
                                                     HH/VV sharpening for Horiz/Vert, 0-8, 0 is off, 4 is normal
  [pad to 512b]

                normal  == rows  00  00 00  00  00 00  00  00 00
                4x6div2 == 1226  00  02 65  01  00 00  01  00 00
                8x6div2 == 2488  01  04 be  00  00 00  00  00 00

		    guesses based on SDK docs:

		9x6div2 == 2728  01  05 36  00  00 00  00  00 00
		9x6div3 == 2724  00  03 90  00  07 14  00  00 00
		9x6div4 == 2628  00  02 97  00  05 22  00  07 ad

    from [01 00 03 03] onwards, only shows in 8x20" PANORAMA prints.  Assume 2" overlap.
    II == 01 02 03 (which panel # in panorama!)
    [02 58] == 600, aka 2" * 300dpi?
    [09 4c] == 2380  (48 less than 8 size? (trim length on ends?)
    [09 7c] == 2428  (ie 8" print)

     (6x20 == 1852x6036)
     (6x14 == 1852x4232)

     3*8" panels == 2428*3=7284.  -6036 = 1248.  /2 = 624 (0x270)

 [[DATA PLANE HEADER]]

   1b 5a 54 01 00 09 00 00  00 00 XX XX YY YY 00 00
   ...
   [pad to 512b]

    data, RGB packed, 8bpp.  No padding to 512b!

 [[FOOTER]]

   1b 42 51 31 00 TT                  ## TT == secs to wait for second print, 0xff also valid for something?


 ****************************************************

Comms Protocol for D90 & CP-M1

 [[ ERROR STATUS ]]

-> 1b 47 44 30 00 00 01 16
<- e4 47 44 30 00 00 00 00  00 00 00 00 00 00 00   [Normal/OK]
<- e4 47 44 30 XX 00 00 00  00 00 00 00 00 3f 37   [Error condition]
                                                   XX == 29 (printer open)
                                                         28 (cut bin missing)
<- e4 47 44 30 21 90 00 00  01 00 00 00 00 3f 37   No ribbon

 [[ MEDIA STATUS ]]

-> 1b 47 44 30 00 00 01 2a
<- e4 47 44 30 ff 0f 50 00  01 ae 01 9b 01 00      [Normal/OK]
<- e4 47 44 30 ff ff ff ff  ff ff ff ff ff ff      [Error]

 [[ MECHA STATUS ]]

-> 1b 47 44 30 00 00 01 17
<- e4 47 44 30 SS SS

 [[ TEMPERATURE QUERY ]]

-> 1b 47 44 30 00 00 01 1f
<- e4 47 44 30 HH

 [[ UNKNOWN QUERY ]]

-> 1b 47 44 30 00 00 01 28
<- e4 47 44 30 XX XX        Unknown, seems to increment.  Lifetime counter?

 [[ JOB STATUS QUERY ?? ]]

-> 1b 47 44 31 00 00 JJ JJ  Jobid?
<- e4 47 44 31 XX YY ZZ ZZ  No idea... maybe remaining prints?

 [[ COMBINED STATUS QUERIES ]]

-> 1b 47 44 30 00 00 04 16  17 1f 2a
<- e4 47 44 30

   MM NN 00 00 ZZ 00 00 00  00 QQ QQ   [id 16, total 11]
   SS SS                               [id 17, total 2]
   HH                                  [id 1f, total 1]
   VV TT WW 00 XX XX YY YY  01 00      [id 2a, total 10]

   WW    == 0x50 or 0x00 (seen, no idea what it means)
   VV    == Media vendor (0xff etc)
   TT    == Media type, 0x02/0x0f etc (see mitsu70x_media_types!)
   XX XX == Media capacity, BE
   YY YY == Media remain,   BE
   QQ QQ == 00 00 normal, 3f 37 error
   MM NN == MM major err (00 if no error) NN minor error.
   ZZ    == 01 seen for _some_ errors.
   SS SS == Mecha Status  (00 == ready, 50 == printing, 80+10 == feedandcut, 80 == initializing?
   HH    == Temperature state.  00 is OK, 0x40 is low, 0x80 is hot.
   II II == ??
   JJ JJ == ??

 [[ WAKE UP PRINTER ]]
-> 1b 45 57 55

 [[ GET iSERIAL Setting ]]

-> 1b 61 36 36 41 be 00 00
   00 01 00 00 00 11 ff ff
   ff fe ff ff ff ee
<- e4 61 36 36 41 be 00 00
   00 01 00 00 00 11 ff ff
   ff fe ff ff ff ee XX      <- XX is 0x80 or 0x00.  (0x80)  ISERIAL OFF

 [[ GET SERIAL NUMBER ]]

-> 1b 61 36 36 41 be 00 00
   00 06 00 00 00 30 ff ff
   ff f9 ff ff ff cf
<- e4 61 36 36 41 00 00 00
   00 06 00 00 00 30 ff ff
   ff f9 ff ff ff cf XX XX
   XX XX XX XX               <- XX is 6-char ASCII serial number!

 [[ GET CUT? ]]

-> 1b 61 36 36 45 ba 00 00
   00 01 00 00 05 07 ff ff
   ff fe ff ff fa f8
-> e4 61 36 36 45 ba 00 00
   00 01 00 00 05 07 ff ff
   ff fe ff ff fa f8 XX      <- XX is 0x80 or 0x00    (0x00)  CUT ON?

 [[ GET WAIT TIME ]]

-> 1b 61 36 36 45 00 00 00
   00 01 00 00 05 05 ff ff
   ff fe ff ff fa fb
-> 1b 61 36 36 45 00 00 00
   00 01 00 00 05 05 ff ff
   ff fe ff ff fa fb XX      <- XX is time in seconds.

 [[ GET RESUME? ]]

-> 1b 61 36 36 45 ba 00 00
   00 01 00 00 05 06 ff ff
   ff fe ff ff fa f9
-> e4 61 36 36 45 ba 00 00
   00 01 00 00 05 06 ff ff
   ff fe ff ff fa f9 XX      <- XX is 0x80 or 0x00    (0x80)  (OFF)

 [[ GET SLEEP TIME! ]]

-> 1b 61 36 36 45 ba 00 00
   00 02 00 00 05 02 ff ff
   ff fd ff ff fa fd
<- e4 61 36 36 45 00 00 00
   00 02 00 00 05 02 ff ff
   ff fd ff ff fa fd XX 00     <- XX, sleep time in minutes.

 [[ SET SLEEP TIME! ]]

-> 1b 61 36 30 45 ba 00 00
   00 02 00 00 05 02 ff ff
   ff fd ff ff fa fd XX 00     <- XX, sleep time in minutes.

 [[ SET iSERIAL ]]

-> 1b 61 36 30 41 be 00 00
   00 01 00 00 00 11 ff ff
   ff fe ff ff ff ee XX        <- XX 0x80 OFF, 0x00 ON.

 [[ SANITY CHECK PRINT ARGUMENTS / MEM CHECK ]]

-> 1b 47 44 33 00 33 07 3c  04 ca 64 00 00 01 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 00
   00 00 00 04 04 00 00 00  00 00 00 00 00 00 00 00
   [[ pad to 512 ]]

   ... 07 3c onwards is the same as main payload header.

<- e4 47 44 43 XX YY

   ... possibly the same as the D70's "memorystatus"
       XX == 00 size ok, 01 bad size, ff out of range
       YY == 00 memory ok, 01 memory full, 02 driver setting, ff out of range

 [[ SEND OVER HDRs and DATA ]]

   ... Print arguments:

-> 1b 53 50 30 00 33 07 3c  04 ca 64 00 00 01 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 00
   00 00 00 04 04 00 00 00  00 00 00 00 00 00 00 00
   [[ pad to 512 ]]

   ... Data transfer.  Plane header:

-> 1b 5a 54 01 00 09 00 00  00 00 07 3c 04 ca 00 00
   [[ pad to 512 ]]

-> [[print data]] [[ padded? ]]
-> [[print data]]

-> 1b 42 51 31 00 ZZ

   ... Footer.
   ZZ == Seconds to wait for follow-up print (0x05)

   ALSO SEEN (in SDK)

   1b 42 61 32 00 00

 [[ UNKNOWN (seen in SDK) ]]

   1b 44 43 41  4e 43 45 4c  00 00 00 00

 request x65 examples:

   ac 80 00 01 bb b8 fe 48 05 13 5d 9c 00 33 00 00  00 00 00 00 00 00 00 00 00 00 02 39 00 00 00 00  03 13 00 02 10 40 00 00 00 00 00 00 05 80 00 3a  00 00
   aa 79 00 01 bb b7 fe 47 05 13 5d 9c 01 2f 00 68  00 00 00 00 00 00 00 00 00 00 02 08 00 00 00 00  03 14 00 02 10 40 00 00 00 00 00 00 05 80 00 3a  00 00

 [ power cycle, new capture ]
   a3 5d 00 01 ba ba fe 43 04 13 5d 9c 00 00 00 00  00 00 00 00 00 00 00 00 00 00 02 0c 00 00 00 00  03 0f 00 03 10 40 00 00 00 00 00 00 05 80 00 3a  00 00
   a3 5d 00 01 ba ba fe 42 04 13 5d 9c 01 08 00 87  00 00 00 00 00 00 00 00 00 00 01 e5 00 00 00 00  03 0f 00 03 10 40 00 00 00 00 00 00 05 80 00 3a  00 00
   a2 5d 00 01 ba ba fe 42 06 13 5d 9c 01 08 00 87  00 00 00 00 00 00 00 00 00 00 01 d1 00 00 00 00  03 0f 00 03 10 40 00 00 00 00 00 00 05 80 00 3a  00 00
 [ power cycle ]
   a2 5c 00 01 ba ba fe 42 06 13 5d 9c 00 00 00 00  00 00 00 00 00 00 00 00 00 00 01 e0 00 00 00 00  03 0f 00 03 10 40 00 00 00 00 00 00 05 80 00 3a  00 00
   a2 5d 00 01 ba ba fe 41 04 13 5d 9c 01 08 00 89  00 00 00 00 00 00 00 00 00 00 01 c9 00 00 00 00  03 0f 00 03 10 40 00 00 00 00 00 00 05 80 00 3a  00 00

 */

/* XXX XXX XXX  CP-M1 series stuff */
#define M1CPCDATA_GAMMA_ROWS 256
#define M1CPCDATA_ROWS 7

struct M1CPCData {
	uint16_t GNMaB[M1CPCDATA_GAMMA_ROWS];
	uint16_t GNMaG[M1CPCDATA_GAMMA_ROWS];
	uint16_t GNMaR[M1CPCDATA_GAMMA_ROWS];

	uint8_t  EnHTH[M1CPCDATA_ROWS];        // fixed @96
	uint8_t  NoISetH[M1CPCDATA_ROWS];      // fixed @8
	uint8_t  NRGain[M1CPCDATA_ROWS];       // fixed @40
	uint8_t  NRTH[M1CPCDATA_ROWS];         // fixed @32
	uint8_t  NRK[M1CPCDATA_ROWS];          // fixed @1
	uint8_t  HDEnhGain[M1CPCDATA_ROWS];    // Varies!
	uint8_t  EnhDarkGain[M1CPCDATA_ROWS];  // Fixed @0
	uint8_t  DictArea[M1CPCDATA_ROWS];     // Fixed @1
	uint8_t  CorCol[M1CPCDATA_ROWS];       // Fixed @2
	uint8_t  HighDownMode[M1CPCDATA_ROWS]; // Fixed @1
	uint16_t HighTH[M1CPCDATA_ROWS];       // Fixed @800
	double   HighG[M1CPCDATA_ROWS];        // Fixed @0.1
};

#define LAMINATE_STRIDE 1852
#define MITSU_CPM1_LAMINATE_FILE CORRTABLE_PATH "/M1_MAT02.raw"
#define CPM1_CPC_FNAME CORRTABLE_PATH "/CPM1_N1.csv"
#define CPM1_CPC_G1_FNAME CORRTABLE_PATH "/CPM1_G1.csv"
#define CPM1_CPC_G5_FNAME CORRTABLE_PATH "/CPM1_G5.csv"
#define CPM1_LUT_FNAME CORRTABLE_PATH "/CPM1_NL.lut"

static struct M1CPCData *get_M1CPCData(const char *filename,
				       const char *gammafilename)
{
	struct M1CPCData *data;
	FILE *f;
	char buf[4096];
	int line;
	char *ptr;

	const char *delim = " ,\t\n\r";
	if (!filename || !gammafilename)
		return NULL;
	data = malloc(sizeof(*data));
	if (!data)
		return NULL;
	f = fopen(gammafilename, "r");
	if (!f)
		goto done_free;

	/* Skip the first two rows */
	for (line = 0 ; line < 2 ; line++) {
		if (fgets(buf, sizeof(buf), f) == NULL)
			goto abort;
	}

	/* Read in the row data */
	for (line = 0 ; line < M1CPCDATA_GAMMA_ROWS ; line++) {
		if (fgets(buf, sizeof(buf), f) == NULL)
			goto abort;
		ptr = strtok(buf, delim);  // Always skip first column
		if (!ptr)
			goto abort;

		/* Pull out the BGR mappings */
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->GNMaB[line] = strtol(ptr, NULL, 10);
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->GNMaG[line] = strtol(ptr, NULL, 10);
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->GNMaR[line] = strtol(ptr, NULL, 10);
	};

	fclose(f);

	/* Now for the CPC Data */
	f = fopen(filename, "r");
	if (!f)
		goto done_free;

	/* Skip the first two rows */
	for (line = 0 ; line < 2 ; line++) {
		if (fgets(buf, sizeof(buf), f) == NULL)
			goto abort;
	}

	/* Read in the row data */
	for (line = 0 ; line < M1CPCDATA_ROWS ; line++) {
		if (fgets(buf, sizeof(buf), f) == NULL)
			goto abort;
		ptr = strtok(buf, delim);  // Always skip first column
		if (!ptr)
			goto abort;

		/* Pull out the mappings */
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->EnHTH[line] = strtol(ptr, NULL, 10);
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->NoISetH[line] = strtol(ptr, NULL, 10);
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->NRGain[line] = strtol(ptr, NULL, 10);
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->NRTH[line] = strtol(ptr, NULL, 10);
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->NRK[line] = strtol(ptr, NULL, 10);
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->HDEnhGain[line] = strtol(ptr, NULL, 10);
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->EnhDarkGain[line] = strtol(ptr, NULL, 10);
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->DictArea[line] = strtol(ptr, NULL, 10);
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->CorCol[line] = strtol(ptr, NULL, 10);
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->HighDownMode[line] = strtol(ptr, NULL, 10);
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->HighTH[line] = strtol(ptr, NULL, 10);
		ptr = strtok(NULL, delim);
		if (!ptr)
			goto abort;
		data->HighG[line] = strtod(ptr, NULL);
	};

	fclose(f);
	return data;
abort:
	fclose(f);
done_free:
	free(data);
	return NULL;
}

static int cpm1_fillmatte(struct mitsud90_printjob *job)
{
	int ret;

	struct mitsud90_job_hdr *hdr = (struct mitsud90_job_hdr *) job->databuf;

	// XXX fill out lamination header?
	ret = mitsu_readlamdata(MITSU_CPM1_LAMINATE_FILE, LAMINATE_STRIDE,
				job->databuf, &job->datalen,
				be16_to_cpu(hdr->rows), be16_to_cpu(hdr->cols), 1);

	if (ret)
		return ret;

	// XXX fill out footer?

	return CUPS_BACKEND_OK;
}