/*
 *   Kodak 8800/9810 Photo Printer CUPS backend -- libusb-1.0 version
 *
 *   (c) 2021 Solomon Peachy <pizza@shaftnet.org>
 *
 *   The latest version of this program can be found at:
 *
 *     https://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 kodak8800_backend

#include "backend_common.h"

/* EK8800 command structures */
struct rtp1_req {
	uint8_t  hdr[4]; /* "RTP1" */
	uint8_t  cmd[4];
	uint32_t max_resplen; /* BE */
	uint32_t payload_len; /* BE */
	uint8_t  payload[];
};

struct rtp1_sts {
	uint8_t  base[2];  // x10 x10 or x10 x12 ? (10 == ok, 12 == error?)
	uint16_t err;      /* see kodak8800_errorstr() */
	uint8_t  sts[4];   // [0] STATE_* [2] PRINT_*
};

struct rtp1_resp {
	uint8_t  hdr[4]; /* "RTP1" */
	uint8_t  cmd[4];
	struct rtp1_sts sts;
	uint32_t payload_len; /* BE */
	uint8_t  payload[];
};

#define STS_OK   0x10
#define STS_ERR  0x12
#define STS_ERR2 0x13 // Not sure what's different

#define STATE_IDLE  0x00
#define STATE_UNK   0x01 // XXX
#define STATE_PRINT 0x02

#define PRINT_IDLE  0x00
#define PRINT_FEED  0x01
#define PRINT_Y     0x02
#define PRINT_M     0x03
#define PRINT_C     0x04
#define PRINT_O     0x05
#define PRINT_EJECT 0x06

struct rtp1_counters {
	uint32_t  cutter_count;
	uint32_t  prints_finished;
	uint32_t  ribbon_head;  // units of 300dpi (ie val / 300 == inches)
	uint32_t  paper_total;  // uints of 300dpi
	uint32_t  prints_started;
};

struct rtp1_errorrecord {
	uint8_t  type;  // ERROR_TYPE_*
	uint16_t code;
	uint8_t  plane; // 0-3
	uint32_t printnum;
	uint32_t ribbonnum;
	uint32_t papernum;
} __attribute__((packed));

#define ERROR_TYPE_END     0x00
#define ERROR_TYPE_USER    0x12
#define ERROR_TYPE_SERVICE 0x13

#define NUM_ERRORRECS 32

struct rtp1_errorlog {
	struct rtp1_errorrecord row[NUM_ERRORRECS];
};

struct rtp1_mediastatus {
	uint8_t  unk[4]; // 00 01 00 02  00 01 00 01
	                 // 00 03 00 06  00 01 00 01 <<-- error state?
	                 // 00 ff 00 02  00 01 00 01
	uint16_t media_type; // 00 01  (YMCX 8x10 Glossy)
	uint16_t paper_type; // 00 01  (8")
	uint32_t ribbon_remain; /* inches */  // also seen 00 0b ff f4 for error state
	uint32_t paper_remain;  /* in inches */
};

/* These are guesses */
#define PAPER_TYPE_7      0x01
#define PAPER_TYPE_8      0x02
#define PAPER_TYPE_8_5    0x03
#define PAPER_TYPE_A4     0x04

#define MEDIA_TYPE_8x10_G 0x01
#define MEDIA_TYPE_8x10_M 0x02
#define MEDIA_TYPE_8x12_G 0x03
#define MEDIA_TYPE_8x12_M 0x04

struct rtp1_serial {
	uint8_t  serial[64];
};

struct rtp1_mfgmodel {
	uint8_t  mfg[64];
	uint8_t  model[64];
	uint8_t  serial[64];
	uint8_t  fwver[64];
};

struct rtp1_fwvers {
	uint8_t  dsp[12];
	uint8_t  eng[12];
	uint8_t  system[12];
	uint8_t  head[12];
	uint8_t  reset[12];
};

struct rtp1_sensors {
	uint8_t unk[6];
	// -> 02 00 06 2a  ff 00
	// -> 02 00 06 2a  ff 00
	// -> 10 00 02 2a  ff 00
	uint8_t head_temp;
	uint8_t head_temp_target;
};

const uint8_t rtp_sendimagedata[4] = { 0x00, 0x00, 0x00, 0x00 }; /* Resp len 0 */
const uint8_t rtp_getmaxxfer[4]    = { 0x01, 0x00, 0x00, 0x00 }; /* Resp len 4 (u32) */
const uint8_t rtp_getstatus[4]     = { 0x06, 0x00, 0x00, 0x00 }; /* Resp len 0 */
const uint8_t rtp_getjobstatus[4]  = { 0x06, 0x03, 0x00, 0x00 }; /* Req len 4, resp 14 XXX */
const uint8_t rtp_getjobqstatus[4] = { 0x06, 0x05, 0x00, 0x00 }; /* Req len 4, resp 14 XXX */
const uint8_t rtp_getmedia[4]      = { 0x06, 0x40, 0x00, 0x00 }; /* Resp len 16 (rtp1_mediastatus) */
const uint8_t rtp_getsensors[4]    = { 0x06, 0x80, 0x00, 0x00 }; /* Resp len 8 (rtp1_sensors */
const uint8_t rtp_getusererrors[4] = { 0x0c, 0x01, 0x00, 0x00 }; /* Resp len 512 (rtp1_errorlog) */
const uint8_t rtp_getserverrors[4] = { 0x0c, 0x02, 0x00, 0x00 }; /* Resp len 512 (rtp1_errorlog) */
const uint8_t rtp_getifaceerrors[4] = { 0x0c, 0x03, 0x00, 0x00 }; /* Resp len 512 (rtp1_errorlog) */
const uint8_t rtp_openjob[4]       = { 0x10, 0x00, 0x00, 0x00 }; /* Resp len 4 (u32) */
const uint8_t rtp_closejob[4]      = { 0x11, 0x00, 0x00, 0x00 }; /* Resp len 0 */
const uint8_t rtp_canceljob[4]     = { 0x12, 0x00, 0x00, 0x00 }; /* Resp len 0 */
const uint8_t rtp_canceljobid[4]   = { 0x12, 0x01, 0x00, 0x00 }; /* Req len 4, Resp len 0 */
const uint8_t rtp_getmfgmodel[4]   = { 0x13, 0x00, 0x00, 0x00 }; /* Resp len 256 (rtp1_mfgmodel) */
const uint8_t rtp_getfwversions[4] = { 0x13, 0x80, 0x00, 0x00 }; /* Resp len 60 (rtp1_fwvers) */
const uint8_t rtp_getserial[4]     = { 0x81, 0x01, 0x00, 0x00 }; /* Resp len 64 (rtp1_serial) */
const uint8_t rtp_getserialhead[4] = { 0x81, 0x01, 0x01, 0x00 }; /* Resp len 64 (rtp1_serial) */
const uint8_t rtp_getcounters[4]   = { 0x81, 0x04, 0x00, 0x00 }; /* Resp len 20 (rtp1_counters) */

// *** XXX cut & page alignment, media total?
//     plus state of cutter, cover, ribbon panel position, etc..

struct rosetta_header {
	uint8_t  esc;
	uint8_t  hdr[15]; /* "MndROSETTA V001" */
	uint8_t  payload[44];
};

struct rosetta_block {
	uint8_t  esc;
	uint8_t  cmd[19]; /* ascii, space-padded */
	uint8_t  zero[4];
	uint32_t payload_len; /* BE */
	uint8_t  payload[];
};

/* Private data structure */
struct kodak8800_printjob {
	size_t jobsize;
	int copies;

	int copies_offset;
	uint8_t *databuf;
};

struct kodak8800_ctx {
	struct dyesub_connection *conn;

	uint8_t jobid;

	char serial[32];
	char fwver[32];

	struct marker marker;
};

static const char* kodak8800_errorstrs(uint16_t error)
{
	switch (error) {
	case 0x0105: return "Unknown 0105"; // seen after issuing START command with a bogus job
	case 0x0203: return "Job not Open";
	case 0x0307: return "Command Disabled";
	case 0x0420: return "Ribbon too Short";
	case 0x0503: return "Operating System";
	case 0x0504: return "Cover Open";
	case 0x2001: return "Check Ribbon";
//	case 0x2002: return "Out of Paper";
//	case 0x2003: return "Ribbon Jammed";
	case 0x2004: return "Ribbon Access Door Open";
//	case 0x2005: return "Paper Access Door open";
//	case 0x2006: return "Cutter Jammed";
//	case 0x2007: return "Ribbon Failed to Advance";
//	case 0x2008: return "Ribbon Failed to Rewind";
//	case 0x2009: return "Paper Failed to Advance";
//	case 0x200a: return "Paper Failed to Rewind";
//	case 0x200b: return "Invalid Ribbon Barcode Type";
//	case 0x200c: return "Head Error";
//	case 0x200d: return "Invalid Head Position";
//	case 0x200e: return "Cooling Timeout Failure";
//	case 0x200f: return "Heating Timeout Failure";
		// 2040-2043 == "Ribbon Error" ?
		// 2044 == "paper feed" ?
	case 0x4302: return "Engine Protocol";
//	case 0x4303: return "Engine Command not Valid";
//	case 0x4304: return "Undefined Engine Command";
//	case 0x4305: return "Failure to Program Engine Flash";
//	case 0x4306: return "Engine Powering Up";
//	case 0x4307: return "VM Range";
//	case 0x4307: return "Ribbon ADC";
//	case 0x4309: return "Cam Homing";
	case 0x430a: return "Barcode Sensor";
//	case 0x430b: return "Unknown RTP";
//	case 0x430c: return "Device not Responding";
//	case 0x430d: return "Bad RTP Response Signature";
//	case 0x430e: return "Bad RTP Command Echo";
		// 8002 == printer not responding ?
	case 0xff01: return "Unknown ff01"; // seen in interface log
	case 0xff02: return "Host Read (instead of write)";
	case 0xff04: return "Unknown ff04"; // seen after issuing bad CANCELJOB
	case 0xffff: return "Unknown ffff"; // seen in interface log
	default:
		return "Unknown";
	}
}

/* Helper Functions */
static int rtp1_docmd(struct kodak8800_ctx *ctx, const uint8_t *cmd,
		      const uint8_t *payload, uint32_t payload_len,
		      uint32_t maxresp_len, uint8_t *respbuf, struct rtp1_sts *sts)
{
	int ret;
	int num;
	struct rtp1_req req;
	struct rtp1_resp resp;

	/* Fill in header */
	req.hdr[0] = 'R';
	req.hdr[1] = 'T';
	req.hdr[2] = 'P';
	req.hdr[3] = '1';
	memcpy(req.cmd, cmd, sizeof(req.cmd));
	req.max_resplen = cpu_to_be32(maxresp_len);
	req.payload_len = cpu_to_be32(payload_len);

	/* Send over cmd structure */
	if ((ret = send_data(ctx->conn, (uint8_t*) &req,
			     sizeof(req))) != 0)
		return ret;

	/* Send over payload, if any */
	if (payload_len)
		if ((ret = send_data(ctx->conn, payload,
				     payload_len)) != 0)
			return ret;

	/* Read response header */
	int try = 0;
retry:
	ret = read_data(ctx->conn, (uint8_t*) &resp,
			sizeof(resp), &num);
	if (try == 0 && num == 0) {
		try = 1;
		goto retry;
	}
	if (num != (int)sizeof(resp)) {
		ERROR("Short Read! (%d/%d)\n", num, (int)sizeof(resp));
		ret = -4;
		goto done;
	}


	/* Copy over the error code */
	if (sts) {
		memcpy(sts, &resp.sts, sizeof(resp.sts));
		sts->err = be16_to_cpu(sts->err);
	}


	/* Read response payload, if any  */
	resp.payload_len = be32_to_cpu(resp.payload_len);
	if (!maxresp_len || !respbuf) {
		if (resp.payload_len)
			ERROR("No buffer supplied but printer sending %d bytes\n", (int)resp.payload_len);
		goto done;
	}

	if (resp.payload_len > maxresp_len) {
		ERROR("Oversize response (%d/%d)\n", resp.payload_len, maxresp_len);
		return CUPS_BACKEND_FAILED;
	}
	ret = read_data(ctx->conn, (uint8_t*) respbuf,
			resp.payload_len, &num);
	if (num != (int) resp.payload_len) {
		ERROR("Short Read! (%d/%d)\n", num, (int)resp.payload_len);
		ret = -4;
		goto done;
	}

done:
	return ret;
}

static int rtp1_getmaxxfer(struct kodak8800_ctx *ctx, uint32_t *maxlen)
{
	int ret;

	ret = rtp1_docmd(ctx, rtp_getmaxxfer, NULL, 0, 4, (uint8_t*)maxlen, NULL);

	*maxlen = be32_to_cpu(*maxlen);

	return ret;
}

static int kodak8800_getinfo(struct kodak8800_ctx *ctx)
{
	int ret;
	struct rtp1_mfgmodel mfgmdl;
	struct rtp1_serial headsn;
	struct rtp1_fwvers fwvers;

	ret = rtp1_docmd(ctx, rtp_getmfgmodel, NULL, 0,
			 sizeof(mfgmdl), (uint8_t*) &mfgmdl, NULL);
	if (ret)
		return ret;
	ret = rtp1_docmd(ctx, rtp_getserialhead, NULL, 0,
			 sizeof(headsn), (uint8_t*) &headsn, NULL);
	if (ret)
		return ret;
	ret = rtp1_docmd(ctx, rtp_getfwversions, NULL, 0,
			 sizeof(fwvers), (uint8_t*) &fwvers, NULL);
	if (ret)
		return ret;

	fwvers.dsp[11] = 0; /* It's special */

	INFO("Manufacturer: %s\n", (char*) mfgmdl.mfg);
	INFO("Model: %s\n", (char*) mfgmdl.model);
	INFO("Serial: %s\n", (char*) mfgmdl.serial);
	INFO("Head Serial: %s\n", (char*) headsn.serial);
	INFO("Main FW Version: %s\n", (char*) mfgmdl.fwver);
	INFO("DSP FW Version: %s\n", (char*) fwvers.dsp);
	INFO("Engine FW Version: %s\n", (char*) fwvers.eng);
	INFO("System FW Version: %s\n", (char*) fwvers.system);
	INFO("Head FW Version: %s\n", (char*) fwvers.head);
	INFO("Reset FW Version: %s\n", (char*) fwvers.reset);

	return CUPS_BACKEND_OK;
}

static int kodak8800_getmedia(struct kodak8800_ctx *ctx)
{
	int ret;
	struct rtp1_mediastatus media;

	ret = rtp1_docmd(ctx, rtp_getmedia, NULL, 0,
			 sizeof(media), (uint8_t*) &media, NULL);
	if (ret)
		return ret;

	media.media_type = be16_to_cpu(media.media_type);
	media.paper_type = be16_to_cpu(media.paper_type);
	media.ribbon_remain = be32_to_cpu(media.ribbon_remain);
	media.paper_remain = be32_to_cpu(media.paper_remain);

	INFO("Ribbon Type: %s (%d)\n", media.paper_type == MEDIA_TYPE_8x10_G ? "Kodak 8810S" : " Unknown", media.media_type);
	INFO("Paper Type: %s (%d)\n", media.paper_type == PAPER_TYPE_7 ? "8\"" : "Unknown", media.paper_type); //XXX
	INFO("Remaining Paper: %d feet\n", media.paper_remain / 12);
	INFO("Remaining Ribbon: %d feet\n", media.ribbon_remain / 12);
	INFO("Remaining Prints: %d\n", media.ribbon_remain / 12 / 4);

	return CUPS_BACKEND_OK;
}

static int kodak8800_getcounters(struct kodak8800_ctx *ctx)
{
	int ret;
	struct rtp1_counters counters;

	ret = rtp1_docmd(ctx, rtp_getcounters, NULL, 0,
			 sizeof(counters), (uint8_t*) &counters, NULL);
	if (ret)
		return ret;

	counters.cutter_count = be32_to_cpu(counters.cutter_count);
	counters.prints_finished = be32_to_cpu(counters.prints_finished);
	counters.prints_started = be32_to_cpu(counters.prints_started);
	counters.ribbon_head = be32_to_cpu(counters.ribbon_head);
	counters.paper_total = be32_to_cpu(counters.paper_total);

	INFO("Lifetime prints %d / %d\n", (int) counters.prints_finished, (int) counters.prints_started);
	INFO("Cutter actuations: %d\n", (int) counters.cutter_count);
	INFO("Total ribbon usage: %d feet\n", counters.ribbon_head / 300 / 12);
	INFO("Total paper usage: %d feet\n", counters.paper_total / 300 / 12);

	return CUPS_BACKEND_OK;
}

static int kodak8800_canceljob(struct kodak8800_ctx *ctx, int id)
{
	int ret;
	uint8_t jobcmd[4];
	uint32_t jobid;

	memcpy(jobcmd, rtp_canceljob, sizeof(jobcmd));

	if (id > 0) {
		jobid = id;
		jobid = cpu_to_be32(jobid);
		jobcmd[1] = 1; // XXX this might need to be the jobid
		ret = rtp1_docmd(ctx, jobcmd, (uint8_t*)&jobid, sizeof(jobid), 0, NULL, NULL);
	} else {
		ret = rtp1_docmd(ctx, jobcmd, NULL, 0, 0, NULL, NULL);
	}

	return ret;
}

static int kodak8800_geterrorlog(struct kodak8800_ctx *ctx, int id)
{
	int ret;
	uint8_t jobcmd[4];
	struct rtp1_errorlog errors;
	int i;

	if (id < 1 || id > 3)
		return CUPS_BACKEND_FAILED;

	memcpy(jobcmd, rtp_getusererrors, sizeof(jobcmd));

	jobcmd[1] = id;

	ret = rtp1_docmd(ctx, jobcmd, NULL, 0, sizeof(errors), (uint8_t*)&errors, NULL);

	if (ret)
		return CUPS_BACKEND_FAILED;
	DEBUG("PRINT  / PAPER  / RIBBON @ PL : CODE (Reason)\n");

	for (i = 0; i < NUM_ERRORRECS; i++) {
		if (errors.row[i].type == ERROR_TYPE_END)
			continue;
		INFO(" %06d / %06d / %06d @ %02d : x%04x (%s)\n",
		     be32_to_cpu(errors.row[i].printnum),
		     be32_to_cpu(errors.row[i].papernum) / 300 / 12,
		     be32_to_cpu(errors.row[i].ribbonnum) / 300 / 12,
		     errors.row[i].plane,
		     be16_to_cpu(errors.row[i].code),
		     kodak8800_errorstrs(be16_to_cpu(errors.row[i].code)));
	}

	/* After an error log query, have to kick things */
	ret = rtp1_docmd(ctx, rtp_getstatus, NULL, 0, 0, NULL, NULL);

	return ret;
}
static void kodak8800_cmdline(void)
{
	DEBUG("\t\t[ -e 1|2|3 ]     # Query error logs\n");
	DEBUG("\t\t[ -i ]           # Query printer info\n");
	DEBUG("\t\t[ -m ]           # Query media info\n");
	DEBUG("\t\t[ -n ]           # Query counters\n");
	DEBUG("\t\t[ -X id ]        # Cancel job (0 for all)\n");
}

static int kodak8800_cmdline_arg(void *vctx, int argc, char **argv)
{
	struct kodak8800_ctx *ctx = vctx;
	int i, j = 0;

	if (!ctx)
		return -1;

	while ((i = getopt(argc, argv, GETOPT_LIST_GLOBAL "e:imnX:")) >= 0) {
		switch(i) {
		GETOPT_PROCESS_GLOBAL
		case 'e':
			j = kodak8800_geterrorlog(ctx, atoi(optarg));
			break;
		case 'i':
			j = kodak8800_getinfo(ctx);
			break;
		case 'm':
			j = kodak8800_getmedia(ctx);
			break;
		case 'n':
			j = kodak8800_getcounters(ctx);
			break;
		case 'X':
			j = kodak8800_canceljob(ctx, atoi(optarg));
			break;

		default:
			break;  /* Ignore completely */
		}

		if (j) return j;
	}

	return CUPS_BACKEND_OK;
}

static void *kodak8800_init(void)
{
	struct kodak8800_ctx *ctx = malloc(sizeof(struct kodak8800_ctx));
	if (!ctx) {
		ERROR("Memory Allocation Failure\n");
		return NULL;
	}
	memset(ctx, 0, sizeof(struct kodak8800_ctx));

	return ctx;
}

static int kodak8800_query_mfgmodel(struct kodak8800_ctx *ctx);

static int kodak8800_attach(void *vctx, struct dyesub_connection *conn, uint8_t jobid)
{
	struct kodak8800_ctx *ctx = vctx;
	int ret;
	struct rtp1_mediastatus media;

	ctx->conn = conn;

        /* Ensure jobid is sane */
        ctx->jobid = jobid & 0x7f;
	if (!ctx->jobid)
		ctx->jobid++;

	if (test_mode < TEST_MODE_NOATTACH) {
		ret = kodak8800_query_mfgmodel(ctx);
		if (ret)
			return CUPS_BACKEND_FAILED;
		ret = rtp1_docmd(ctx, rtp_getmedia, NULL, 0, sizeof(media), (uint8_t*)&media, NULL);
		if (ret)
			return CUPS_BACKEND_FAILED;

		media.ribbon_remain = be32_to_cpu(media.ribbon_remain);
		media.paper_remain = be32_to_cpu(media.paper_remain);
		media.media_type = be16_to_cpu(media.media_type);
	} else {
		strcpy(ctx->fwver, "0.0");
		strcpy(ctx->serial, "12345");
		media.ribbon_remain = 92;
		media.paper_remain = 24;
		media.media_type = MEDIA_TYPE_8x10_G;
// XXX		media.unk[0..4]?
	}

	media.ribbon_remain /= 4;
	if (media.ribbon_remain < media.paper_remain)
		ctx->marker.levelnow = media.ribbon_remain;
	else
		ctx->marker.levelnow = media.paper_remain;
	ctx->marker.levelnow /= 12;

	ctx->marker.color = "#00FFFF#FF00FF#FFFF00";
	ctx->marker.numtype = media.media_type;

	if (media.media_type == MEDIA_TYPE_8x10_G) {
		ctx->marker.name = "8810S (8x10)";
		ctx->marker.levelmax = 300;
	} else {
		ctx->marker.name = "8810L (8x12)";
		ctx->marker.levelmax = 250;
	}

	return CUPS_BACKEND_OK;
}

static void kodak8800_cleanup_job(const void *vjob)
{
	const struct kodak8800_printjob *job = vjob;

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

	free((void*)job);
}

static int kodak8800_read_parse(void *vctx, const void **vjob, int data_fd, int copies) {
	struct kodak8800_ctx *ctx = vctx;
	int ret;

	struct kodak8800_printjob *job = NULL;

	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));

	/* Read Rosetta data */
	job->databuf = malloc(sizeof(struct rosetta_header));
	if (!job->databuf) {
		ERROR("Memmory allocation failure!\n");
		kodak8800_cleanup_job(job);
		return CUPS_BACKEND_RETRY;
	}

	/* Read rosetta header */
	ret = read(data_fd, job->databuf, sizeof(struct rosetta_header));
	if (ret < 0 || ret != sizeof(struct rosetta_header)) {
		if (ret != 0) {
			perror("ERROR: read failed");
		}
		kodak8800_cleanup_job(job);
		return CUPS_BACKEND_CANCEL;
	}
	job->jobsize += sizeof(struct rosetta_header);

	/* Sanity check header */
	if (memcmp(job->databuf, "\x1bMndROSETTA V001", 16)) {
		ERROR("Invalid ROSETTA header\n");
		kodak8800_cleanup_job(job);
		return CUPS_BACKEND_CANCEL;
	}

	/* Reallocate databuf */
	job->databuf = realloc(job->databuf, 2624*3624*3+4*1024); // XXX better solution here?
	if (!job->databuf) {
		ERROR("Memmory allocation failure!\n");
		kodak8800_cleanup_job(job);
		return CUPS_BACKEND_RETRY;
	}
	/* Read in the data blocks */
	while (1) {
		struct rosetta_block *block = (struct rosetta_block *)(job->databuf + job->jobsize);
		uint32_t payload_len = 0;

		/* Read in block header */
		ret = read(data_fd, block, sizeof(struct rosetta_block));
		if (ret < 0 || ret != sizeof(struct rosetta_block)) {
			if (ret != 0) {
				perror("ERROR: read failed");
			}
			kodak8800_cleanup_job(job);
			return CUPS_BACKEND_CANCEL;
		}
		payload_len = be32_to_cpu(block->payload_len);
//		INFO("block %d @ %d \n", payload_len + sizeof(struct rosetta_block), job->jobsize);

		/* Read in block payload */
		ret = read(data_fd, block->payload, payload_len);
		if (ret < 0 || ret != (int) payload_len) {
			if (ret != 0) {
				perror("ERROR: read failed");
			}
			kodak8800_cleanup_job(job);
			return CUPS_BACKEND_CANCEL;
		}
		job->jobsize += sizeof(struct rosetta_block);
		job->jobsize += payload_len;

		/* Work out our copies offset */
		if (!memcmp(block->cmd, "FlsPgCopies", 11)) {
			job->copies_offset = job->jobsize - payload_len;
		}
		/* If this is the last block, we're done! */
		if (!memcmp(block->cmd, "MndEndJob", 9))
			break;
	}

	/* Handle copies */
	if (job->copies_offset) {
		uint32_t tmp = 0;
		memcpy(&tmp, job->databuf + job->copies_offset, sizeof(tmp));
		tmp = be32_to_cpu(tmp);
		if ((int)tmp < copies) {
			tmp = be32_to_cpu(copies);
			memcpy(job->databuf + job->copies_offset, &tmp, sizeof(tmp));
		}
	}

	job->copies = copies;
	*vjob = job;

	return CUPS_BACKEND_OK;
}

static int kodak8800_main_loop(void *vctx, const void *vjob, int wait_for_return) {
	struct kodak8800_ctx *ctx = vctx;

	int ret;
	struct rtp1_sts sts;

	const struct kodak8800_printjob *job = vjob;

	if (!ctx)
		return CUPS_BACKEND_FAILED;
	if (!job)
		return CUPS_BACKEND_FAILED;

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

	/* Query status */
	do {
		ret = rtp1_docmd(ctx, rtp_getstatus, NULL, 0, 0, NULL, &sts);
		if (ret)
			return ret;
		if (sts.err) {
			ERROR("Printer reports error: %s (%04x)\n",
			      kodak8800_errorstrs(sts.err), sts.err);
			return CUPS_BACKEND_FAILED;
		}
		if (sts.sts[0] == STATE_IDLE) {
			break;
		}
		sleep(1);
	} while (1);

	INFO("Sending image data\n");

	uint32_t jobid;
	ret = rtp1_docmd(ctx, rtp_openjob, NULL, 0, 4, (uint8_t*)&jobid, &sts);
	if (ret)
		return ret;

	jobid = be32_to_cpu(jobid);
	if (sts.err) {
		ERROR("Printer reports error: %04x\n", sts.err);
		return CUPS_BACKEND_FAILED;
	}
	INFO("Printer assigned Job ID: %d\n", (int) jobid);

	/* Sent over data blocks */
	uint32_t offset = 0;
	while (offset < job->jobsize) {
		uint32_t max_blocksize;
		ret = rtp1_getmaxxfer(ctx, &max_blocksize);
		if (ret)
			return ret;

		if (job->jobsize - offset < max_blocksize)
			max_blocksize = job->jobsize - offset;

		ret = rtp1_docmd(ctx, rtp_sendimagedata,
				 job->databuf + offset, max_blocksize,
				 0, NULL, &sts);
		if (ret)
			return ret;
		if (sts.err) {
			ERROR("Printer reports error: %s (%04x)\n",
			      kodak8800_errorstrs(sts.err), sts.err);
			return CUPS_BACKEND_FAILED;
		}

		offset += max_blocksize;
	}
	/* Send payload footer */
	ret = rtp1_docmd(ctx, rtp_closejob,
			 NULL, 0, 0, NULL, &sts);
	if (ret)
		return ret;

	INFO("Waiting for printer to acknowledge completion\n");

	do {
		sleep(1);

		ret = rtp1_docmd(ctx, rtp_getstatus, NULL, 0, 0, NULL, &sts);
		if (ret)
			return ret;
		if (sts.err) {
			ERROR("Printer reports error: %s (%04x)\n",
			      kodak8800_errorstrs(sts.err), sts.err);
			return CUPS_BACKEND_FAILED;
		}
		if (sts.sts[0] == STATE_IDLE) {
			break;
		}
		if (!wait_for_return) {
			INFO("Fast return mode enabled.\n");
			break;
		}
		sleep(1);
	} while (1);

	INFO("Print complete\n");

	return CUPS_BACKEND_OK;
}

static int kodak8800_query_serno(struct dyesub_connection *conn, char *respbuf, int buf_len)
{
	uint8_t buf[64];
	int ret;

	struct kodak8800_ctx ctx = {
		.conn = conn,
	};

	ret = rtp1_docmd(&ctx, rtp_getserial, NULL, 0, sizeof(buf), buf, NULL);

	if (!ret)
		memcpy(respbuf, buf, buf_len);

	return ret;
}

static int kodak8800_query_mfgmodel(struct kodak8800_ctx *ctx)
{
	uint8_t buf[256];
	int ret;

	ret = rtp1_docmd(ctx, rtp_getmfgmodel, NULL, 0, sizeof(buf), buf, NULL);

	if (!ret) {
		memcpy(ctx->serial, buf + 64*2, sizeof(ctx->serial));
		memcpy(ctx->fwver, buf + 64*3, sizeof(ctx->fwver));
	}

	return ret;
}

static int kodak8800_query_markers(void *vctx, struct marker **markers, int *count)
{	struct kodak8800_ctx *ctx = vctx;
	struct rtp1_mediastatus media;
	int ret;

	ret = rtp1_docmd(ctx, rtp_getmedia, NULL, 0, sizeof(media), (uint8_t*)&media, NULL);
	if (ret)
		return CUPS_BACKEND_FAILED;

	media.ribbon_remain = be32_to_cpu(media.ribbon_remain);
	media.paper_remain = be32_to_cpu(media.paper_remain);

	media.ribbon_remain /= 4;
	if (media.ribbon_remain < media.paper_remain)
		ctx->marker.levelnow = media.ribbon_remain;
	else
		ctx->marker.levelnow = media.paper_remain;
	ctx->marker.levelnow /= 12;

	*markers = &ctx->marker;
	*count = 1;

	return CUPS_BACKEND_OK;
}

static int kodak8800_query_stats(void *vctx, struct printerstats *stats)
{
	struct kodak8800_ctx *ctx= vctx;
	struct rtp1_counters counters;
	struct rtp1_sts sts;

	int ret;

	stats->mfg = "Kodak";
	stats->model = "8800/9810";

	ret = kodak8800_query_mfgmodel(ctx);
	if (ret)
		return ret;

	stats->serial = ctx->serial;
	stats->fwver = ctx->fwver;

	stats->decks = 1;
	stats->mediatype[0] = ctx->marker.name;
	stats->levelmax[0] = ctx->marker.levelmax;
	stats->levelnow[0] = ctx->marker.levelnow;
	stats->name[0] = "Roll";

	ret = rtp1_docmd(ctx, rtp_getcounters, NULL, 0, sizeof(counters), (uint8_t*) &counters, &sts);
	if (ret)
		return ret;

	stats->cnt_life[0] = be32_to_cpu(counters.prints_finished);

	const char *status;
	if (sts.err)
		status = "Error";
	else if (sts.sts[0] == STATE_IDLE)
		status = "Idle";
	else if (sts.sts[0] == STATE_PRINT)
		status = "Printing";
	else
		status = "Unknown";

	stats->status[0] = strdup(status); // XXX

	return CUPS_BACKEND_OK;
}


static const char *kodak8800_prefixes[] = {
	"kodak8800", // Family driver, do NOT nuke!
	NULL
};

/* Exported */
const struct dyesub_backend kodak8800_backend = {
	.name = "Kodak 8800/9810",
	.version = "0.07",
	.uri_prefixes = kodak8800_prefixes,
	.cmdline_usage = kodak8800_cmdline,
	.cmdline_arg = kodak8800_cmdline_arg,
	.init = kodak8800_init,
	.attach = kodak8800_attach,
	.cleanup_job = kodak8800_cleanup_job,
	.read_parse = kodak8800_read_parse,
	.main_loop = kodak8800_main_loop,
	.query_serno = kodak8800_query_serno,
	.query_markers = kodak8800_query_markers,
	.query_stats = kodak8800_query_stats,
	.devices = {
		{ 0x040a, 0x4023, P_KODAK_8800, "Kodak", "kodak-8800"},
		{ 0x040a, 0x4023, P_KODAK_8800, "Kodak", "kodak-9810"}, // duplicate
		{ 0, 0, 0, NULL, NULL}
	}
};

/*

 ************* Kodak 8800/9810 Spool format

    General format for blocks (except initial header)
    All multi-byte fields are BIG ENDIAN

   1b xx xx xx xx xx xx xx  xx xx xx xx xx xx xx xx
   xx xx xx xx 00 00 00 00  NN NN NN NN

     [ followed by NN bytes of payload ]
     [ xx is ASCII field name, space (0x20) padded ]

    File header (fixed)

 1b 4d 6e 64 52 4f 53 45  54 54 41 20 56 30 30 31  'MndROSETTA V001'
 2e 30 30 31 30 30 30 30  30 30 32 30 35 32 35 30
 37 32 36 39 36 45 37 34  36 35 37 32 34 32 36 39
 36 45 34 44 36 46 37 34  37 32 36 43

    Job header (fixed)

 1b 4d 6e 64 42 67 6e 4a  6f 62 20 20 50 72 69 6e  'MndBgnJob  Print   '
 74 20 20 20 00 00 00 00  00 00 00 08 56 30 30 31
 2e 30 30 30

    Job Settings start (fixed)

 1b 46 6c 73 53 72 74 4a  62 44 65 66 53 65 74 75  'FlsSrtJbDefSetup   '
 70 20 20 20 00 00 00 00  00 00 00 00

    Job Media selection

 1b 46 6c 73 4a 62 4d 6b  4d 65 64 20 4e 61 6d 65  'FlsJbMkMed Name    '
 20 20 20 20 00 00 00 00  00 00 00 40 59 4d 43 58
 20 38 78 31 32 20 47 6c  6f 73 73 79 00 00 00 00
 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  :: @YMCX 8x12 Glossy
 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

      ~~ or:

 1b 46 6c 73 4a 62 4d 6b  4d 65 64 20 4e 61 6d 65
 20 20 20 20 00 00 00 00  00 00 00 40 59 4d 43 58
 20 38 78 31 30 20 47 6c  6f 73 73 79 00 00 00 00  :: @YMCX 8x10 Glossy
 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 00 00 00  00 00 00 00

    Page Media Selection  (fixed at 8")

 1b 46 6c 73 50 67 4d 65  64 69 61 20 4e 61 6d 65  'FlsPgMedia Name    '
 20 20 20 20 00 00 00 00  00 00 00 40 XX XX XX XX  '7"' '8"' '8.5"' 'A4'
 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 00 00 00  00 00 00 00 00 00 00 00
 00 00 00 00 00 00 00 00  00 00 00 00

    Lamination

 1b 46 6c 73 4a 62 4c 61  6d 20 20 20 XX XX XX 20  'FlsJbLam   ???     '
 20 20 20 20 00 00 00 00  00 00 00 00

                       XX XX XX is '4f 66 66' (Off) or '4f 6e 20' (On)

    Job Settings end (fixed)

 1b 46 6c 73 53 74 70 4a  62 44 65 66 20 20 20 20  'FlsStpJbDef        '
 20 20 20 20 00 00 00 00  00 00 00 00

    Page start (fixed)

 1b 4d 6e 64 42 67 6e 4c  50 61 67 65 4e 6f 72 6d  'MndBgnLPageNormal  '
 61 6c 20 20 00 00 00 00  00 00 00 04 00 00 00 01

    Page parameters

 1b 4d 6e 64 53 65 74 4c  50 61 67 65 20 20 20 20  'MdnSetLPage        '
 20 20 20 20 00 00 00 00  00 00 00 08 00 00 XX XX  XX XX == 09 A0 (2464)
 00 00 YY YY                                       YY YY == 0E 28 (3624) 8x12
                                                         == 0B D0 (3024) 8x10

    Image size

 1b 4d 6e 64 49 6d 53 70  65 63 20 20 53 69 7a 65  'MndImSpec  Size    '
 20 20 20 20 00 00 00 00  00 00 00 10 00 00 09 a0  XX XX, YY YY (see above)
 00 00 YY YY 00 00 XX XX  00 00 00 00

    Image Position on page (fixed @ 0x0)

 1b 46 6c 73 49 6d 50 6f  73 69 74 6e 53 70 65 63  'FlsImPositnSpecify '
 69 66 79 20 00 00 00 00  00 00 00 08 00 00 00 00
 00 00 00 00

    Image Sharpening:

 1b 46 6c 73 49 6d 53 68  61 72 70 20 53 65 74 4c  'FlsImSharp SetLevel'
 65 76 65 6c 00 00 00 00  00 00 00 02 ff SS        SS == 12 (Normal)
                                                      == 0  (None)
                                                      == 19 (High)
    Page Copies:

 1b 46 6c 73 50 67 43 6f  70 69 65 73 20 20 20 20  'FlsPgCopies        '
 20 20 20 20 00 00 00 00  00 00 00 04 00 00 00 NN  NN == Copies (01+)

    Other settings (fixed for now)

 1b 46 6c 73 50 67 4d 69  72 72 6f 72 4e 6f 6e 65  'FlsPgMirrorNone    '
 20 20 20 20 00 00 00 00  00 00 00 00

 1b 46 6c 73 50 67 52 6f  74 61 74 65 4e 6f 6e 65  'FlsPgRotateNone    '
 20 20 20 20 00 00 00 00  00 00 00 00

    Cut list

 1b 46 6c 73 43 75 74 4c  69 73 74 20 20 20 20 20  'FlsCutList         '
 20 20 20 20 00 00 00 00  00 00 NN NN [ NN * 2 ]

   8x10:          00 04 00 0c 0b c4
   8x10div2:      00 06 00 0c 05 e8 0b c4
   8x10div2slug2: 00 06 00 0c 05 d5 05 fb 0b c4
   8x12:          00 04 00 0c 0e 1c
   8x12div2:      00 06 00 0c 07 14 0e 1c
   8x12div2slug2: 00 06 00 0c 07 01 07 27 0e 1c

    Image Plane data block

 1b 46 6c 73 44 61 74 61  20 20 20 20 42 6c 6f 63  'FlsData    Block   '
 6b 20 20 20 00 00 00 00  LL LL LL LL              LL LL LL LL == plane len 32BE
 49 6d 61 67 65 20 20 20                           'Image   '

    [[[ plane data, LLLLLLLL - 8 bytes ]]]

 1b 46 6c 73 44 61 74 61  20 20 20 20 42 6c 6f 63  'FlsData    Block   '
 6b 20 20 20 00 00 00 00  LL LL LL LL
 49 6d 61 67 65 20 20 20                           'Image   '

    [[[ plane data, LLLLLLLL - 8 bytes ]]]

 1b 46 6c 73 44 61 74 61  20 20 20 20 42 6c 6f 63  'FlsData    Block   '
 6b 20 20 20 00 00 00 00  LL LL LL LL
 49 6d 61 67 65 20 20 20                           'Image   '

    [[[ plane data, LLLLLLLL -8 bytes ]]]

    End Page (fixed)

 1b 4d 6e 64 45 6e 64 4c  50 61 67 65 20 20 20 20  'MndEndLPage        '
 20 20 20 20 00 00 00 00  00 00 00 00

    End Job (fixed)

 1b 4d 6e 64 45 6e 64 4a  6f 62 20 20 20 20 20 20  'MndEndJob          '
 20 20 20 20 00 00 00 00  00 00 00 00

 *************** Basic command format:  (all multi-bytes are BIG ENDIAN)

>  52 54 50 31 xx xx xx xx  yy yy yy yy l1 l1 l1 l1
>> [ l1l1l1l1 bytes of payload ]
<  52 54 40 31 xx xx xx xx  ss ss EE EE s2 00 00 00  l2 l2 l2 l2
<< [ l2l2l2l2 bytes of payload ]

     xx xx xx xx == command
     yy yy yy yy == response buffer length (ie l2l2l2l2 must be <= yyyyyyyy)
     ss ss == status message (10 10 is ok, 10 12 error)
     EE EE == error code
     s2 == secondary status (seen 00, 01, 02)


 **************** TODO

 * Sensor reporting (and queries)
 * Job status / Job queue status
 * Print status & errors
 * 8x12 media crap

 */
