drv_SamsungSPF.c

/* $Id: drv_SamsungSPF 975 2009-01-18 11:16:20Z michael $
   * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_SamsungSPF.c $
   *
   * SamsungSPF lcd4linux driver
   *
   * Copyright (C) 2012 Sascha Plazar <sascha@plazar.de>
   * Copyright (C) 2005, 2006, 2007 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
   *
   * This driver is based on playusb.c created on Aug 2, 2010 by Andre Puschmann
   * which is in turn based on code from Grace Woo:
   *    http://web.media.mit.edu/~gracewoo/stuff/picframe
   *
   * This file is part of LCD4Linux.
   *
   * LCD4Linux is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2, or (at your option)
   * any later version.
   *
   * LCD4Linux is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   *
   */

/*
   *
   * exported fuctions:
   *
   * struct DRIVER drv_SamsungSPF
   *
   */

#include "config.h"

#include <stdio.h>
#include <string.h>

#include <usb.h>
#include <jpeglib.h>

#include "debug.h"
#include "cfg.h"
#include "qprintf.h"
#include "timer.h"
#include "drv.h"

/* graphic display? */
#include "drv_generic_graphic.h"
#include "jpeg_mem_dest.h"

#define FILLSIZE 16384 // 16kB
#define HEADERSIZE 12

// Drivername for verbose output
static char Name[] = "SamsungSPF";

struct SPFdev
{
	const char type[64];
	const int vendorID;
	struct
	{
		const int storageMode;
		const int monitorMode;
	} productID;
	const unsigned int xRes;
	const unsigned int yRes;
};

static struct SPFdev spfDevices[] =
{
	{
		.type = "SPF-AUTO",
		.vendorID = 0x04e8,
		.productID = {0xffff, 0xffff},
		.xRes = 1,
		.yRes = 1,
	},
	{
		.type = "SPF-72H",
		.vendorID = 0x04e8,
		.productID = {0x200a, 0x200b},
		.xRes = 800,
		.yRes = 480,
	},
	{
		.type = "SPF-75H",
		.vendorID = 0x04e8,
		.productID = {0x200e, 0x200f},
		.xRes = 800,
		.yRes = 480,
	},
	{
		.type = "SPF-76H",
		.vendorID = 0x04e8,
		.productID = {0x200e, 0x200f},
		.xRes = 800,
		.yRes = 480,
	},
	{
		.type = "SPF-83H",
		.vendorID = 0x04e8,
		.productID = {0x200c, 0x200d},
		.xRes = 800,
		.yRes = 600,
	},
	{
		.type = "SPF-85H",
		.vendorID = 0x04e8,
		.productID = {0x2012, 0x2013},
		.xRes = 800,
		.yRes = 600,
	},
	{
		.type = "SPF-85P",
		.vendorID = 0x04e8,
		.productID = {0x2016, 0x2017},
		.xRes = 800,
		.yRes = 600,
	},
	{
		.type = "SPF-86H",
		.vendorID = 0x04e8,
		.productID = {0x2012, 0x2013},
		.xRes = 800,
		.yRes = 600,
	},
	{
		.type = "SPF-86P",
		.vendorID = 0x04e8,
		.productID = {0x2016, 0x2017},
		.xRes = 800,
		.yRes = 600,
	},
	{
		.type = "SPF-87H",
		.vendorID = 0x04e8,
		.productID = {0x2025, 0x2026},
		.xRes = 800,
		.yRes = 480,
	},
	{
		.type = "SPF-87H-v2",
		.vendorID = 0x04e8,
		.productID = {0x2033, 0x2034},
		.xRes = 800,
		.yRes = 480,
	},
	{
		.type = "SPF-105P",
		.vendorID = 0x04e8,
		.productID = {0x201c, 0x201b},
		.xRes = 1024,
		.yRes = 600,
	},
	{
		.type = "SPF-107H",
		.vendorID = 0x04e8,
		.productID = {0x2027, 0x2028},
		.xRes = 1024,
		.yRes = 600,
	},
	{
		.type = "SPF-107H-v2",
		.vendorID = 0x04e8,
		.productID = {0x2035, 0x2036},
		.xRes = 1024,
		.yRes = 600,
	},
	{
		.type = "SPF-700T",
		.vendorID = 0x04e8,
		.productID = {0x204f, 0x2050},
		.xRes = 800,
		.yRes = 600,
	},
	{
		.type = "SPF-1000P",
		.vendorID = 0x04e8,
		.productID = {0x2039, 0x2040},
		.xRes = 1024,
		.yRes = 600,
	},
};

static int numFrames = sizeof(spfDevices) / sizeof(spfDevices[0]);

struct usb_device *myDev;
usb_dev_handle *myDevHandle;
struct SPFdev *myFrame;

typedef struct
{
	unsigned char R, G, B;
} RGB;

static struct
{
	RGB *buf;
	int dirty;
	int fbsize;
} image;

static struct
{
	unsigned char *buf;
	unsigned long int size;
} jpegImage;


/****************************************/
/***  hardware dependant functions    ***/
/****************************************/


/* please note that in-memory compression doesn't work satisfactory */
int convert2JPG()
{
	struct jpeg_compress_struct cinfo;
	struct jpeg_error_mgr jerr;
	int row_stride;		/* physical row width in buffer */
	JSAMPROW row_pointer[1];	/* pointer to a single row */

	/* Initialize compression frame */
	cinfo.err = jpeg_std_error(&jerr);
	jpeg_create_compress(&cinfo);
	jpeg_mem_dest(&cinfo, &jpegImage.buf, &jpegImage.size);

	cinfo.image_width = myFrame->xRes;
	cinfo.image_height = myFrame->yRes;
	cinfo.input_components = sizeof(RGB);
	cinfo.in_color_space = JCS_RGB;

	/* call some jpeg helpers */
	jpeg_set_defaults(&cinfo);
	jpeg_set_quality(&cinfo, 100, 1);	/*set the quality [0..100]  */
	jpeg_start_compress(&cinfo, 1);

	row_stride = cinfo.image_width;

	/* Convert line by line */
	while (cinfo.next_scanline < cinfo.image_height)
	{
		row_pointer[0] = (JSAMPROW) (image.buf + (cinfo.next_scanline * row_stride));
		jpeg_write_scanlines(&cinfo, row_pointer, 1);
	}

	/* Finish compression and free internal memory */
	jpeg_finish_compress(&cinfo);
	jpeg_destroy_compress(&cinfo);

	return 0;
}


// Find specific Samsung device
static void drv_SamsungSPF_find()
{
	info("%s: Searching SPF.", Name);

	/* open USB device */
	struct usb_bus *bus;
	struct usb_device *dev;
	int i;

	usb_init();
	usb_find_busses();
	usb_find_devices();

	for (bus = usb_busses; bus; bus = bus->next)
	{
		for (dev = bus->devices; dev; dev = dev->next)
		{
			if (dev->descriptor.idVendor == myFrame->vendorID)
			{
				if (myFrame->productID.storageMode == 0xFFFF)
				{
					for (i = 0; i < numFrames; i++)
					{
						if (dev->descriptor.idProduct == spfDevices[i].productID.storageMode)
						{

							info("Samsung photoframe in Mass Storage mode found.");
							myFrame = &spfDevices[i];
							info("%s: Autodetect model %s.", Name, spfDevices[i].type);
							myDev = dev;

							return;
						}
						else if (dev->descriptor.idProduct == spfDevices[i].productID.monitorMode)
						{

							info("Samsung photoframe in Custom Product mode found.");
							myFrame = &spfDevices[i];
							info("%s: Autodetect model %s.", Name, spfDevices[i].type);
							myDev = dev;

							return;
						}
					}
				}
				else
				{
					if (dev->descriptor.idProduct == myFrame->productID.storageMode)
					{

						info("Samsung photoframe in Mass Storage mode found.");
						myDev = dev;

						return;
					}
					else if (dev->descriptor.idProduct == myFrame->productID.monitorMode)
					{

						info("Samsung photoframe in Custom Product mode found.");
						myDev = dev;

						return;
					}
				}
			}
		}
	}

	free(bus);
	myDev = 0;
}


static int drv_SamsungSPF_open()
{
	if (!myDev)
	{
		error("%s: No device specified!", Name);
		return -1;
	}

	int res = -1;
	char buf[256];

	if (myDev->descriptor.idProduct == myFrame->productID.storageMode)
	{
		info("%s: Opening device and switching to monitor mode", Name);

		myDevHandle = usb_open(myDev);

#if 0
		setuid(getuid());
#endif

		strcpy(buf, "** no string **");
		res = usb_get_string_simple(myDevHandle, myDev->descriptor.iManufacturer, buf, sizeof(buf));
		debug("usb_get_string_simple => %d, %s", res, buf);

		memset(buf, 0, 256);

		res = usb_control_msg(myDevHandle, USB_TYPE_STANDARD | USB_ENDPOINT_IN,
		                      USB_REQ_GET_DESCRIPTOR, 0xfe, 0xfe, buf, 0xfe, 1000);
		/* usb_close( myDev ); */
		usb_close(myDevHandle);
		// Sleep some time before research
		sleep(1);
		drv_SamsungSPF_find();
	}
	else
		info("%s: No device in storage mode found", Name);

	if (myDev->descriptor.idProduct == myFrame->productID.storageMode)
	{
		error("%s: Was not able to switch to monitor mode!", Name);
		return -1;
	}

	if (myDev->descriptor.idProduct == myFrame->productID.monitorMode)
	{
		info("%s: Device '%s' is now in monitor mode.", Name, myFrame->type);
		myDevHandle = usb_open(myDev);
		return 0;
	}

	error("Unknown error: usb_control_msg() = %d", res);
	return -1;
}


/* dummy function that sends something to the display */
static int drv_SamsungSPF_send(char *data, unsigned int len)
{
	char usb_hdr[HEADERSIZE] = { 0xa5, 0x5a, 0x18, 0x04, 0xff, 0xff,
	                             0xff, 0xff, 0x48, 0x00, 0x00, 0x00
	                           };
#if 0
	char buffer[1] = { 0x0 };
#endif
	int usb_timeout = 1000;
	int usb_endpoint = 0x2;
	int ret;

	*(int *) (usb_hdr + 4) = len;

	debug("bytes_to_send: %d, offset: %d", len, HEADERSIZE);

#if 0
	/* Send USB header */
	if ((ret = usb_bulk_write(myDevHandle, usb_endpoint, usb_hdr, 12, usb_timeout)) < 0)
	{
		error("%s: Error occurred while writing data to device.", Name);
		error("%s: usb_bulk_write returned: %d", Name, ret);
		return -1;
	}

	/* Send JPEG image */
	if ((ret = usb_bulk_write(myDevHandle, usb_endpoint, data, len, usb_timeout)) < 0)
	{
		error("%s: Error occurred while writing data to device.", Name);
		error("%s: usb_bulk_write returned: %d", Name, ret);
		return -1;
	}

	/* Finish transmission by sending zero */
	if ((ret = usb_bulk_write(myDevHandle, usb_endpoint, buffer, 1, usb_timeout)) < 0)
	{
		error("%s: Error occurred while writing data to device.", Name);
		error("%s: usb_bulk_write returned: %d", Name, ret);
		return -1;
	}
#endif

	char *buffer;
	unsigned int rest = FILLSIZE - ((len + HEADERSIZE) % FILLSIZE); /* +1; */
	unsigned int full = HEADERSIZE + len + rest;

	debug("calculated full bytes_to_send:: %d", full);

	buffer = malloc(full + FILLSIZE); //added FILLSIZE is just for safety
	if (buffer != NULL)
	{
		int i;
		for (i = 0; i < HEADERSIZE; i++)
			buffer[i] = usb_hdr[i];
		memset(buffer + HEADERSIZE + len, 0x00, rest);
		memcpy(buffer + HEADERSIZE, data, len);
		if ((ret = usb_bulk_write(myDevHandle, usb_endpoint, buffer, full, usb_timeout)) < 0)
		{
			error("%s: Error occurred while writing data to device.", Name);
			error("%s: usb_bulk_write returned: %d", Name, ret);
			free(buffer);
			return -1;
		}
		else
		{
			free(buffer);
		}
	}
	else
	{
		error("%s: Not enough free memory.", Name);
		return -1;
	}

	/* Keep SPF87h and friends in MiniMonitorMode */
	char bytes[]= {0x09,0x04};

	if ((ret = usb_control_msg(myDevHandle, 0xc0, 0x01, 0x0000, 0x0000, bytes, 0x02, 1000)) < 0)
	{
		error("%s: Error occurred while sending control_msg to device.", Name);
		error("%s: usb_control_msg returned: %d", Name, ret);
	};

	return 0;
}


/* for graphic displays only */
static void drv_SamsungSPF_blit(const int row, const int col, const int height, const int width)
{
	int r, c;

	for (r = row; r < row + height; r++)
	{
		for (c = col; c < col + width; c++)
		{
			RGB p1 = image.buf[r * myFrame->xRes + c];
			RGBA p2 = drv_generic_graphic_rgb(r, c);
			if (p1.R != p2.R || p1.G != p2.G || p1.B != p2.B)
			{
				image.buf[r * myFrame->xRes + c].R = p2.R;
				image.buf[r * myFrame->xRes + c].G = p2.G;
				image.buf[r * myFrame->xRes + c].B = p2.B;
				image.dirty = 1;
			}
		}
	}
}


static void drv_SamsungSPF_timer( __attribute__ ((unused))
                                  void *notused)
{
	if (image.dirty)
	{
		debug("FB dirty, writing jpeg...");
		convert2JPG();

		/* Sent image to display */
		if ((drv_SamsungSPF_send((char *) jpegImage.buf, jpegImage.size)) != 0)
		{
			error("%s: Error occurred while sending jpeg image to device.", Name);
		}
		/* Clean dirty bit */
		image.dirty = 0;

		/* Free JPEG buffer since a new is allocated each time an image is
		   compressed */
		if (jpegImage.size)
			free(jpegImage.buf);
		jpegImage.size = 0;
	}
}


/* start graphic display */
static int drv_SamsungSPF_start(const char *section)
{
	int timerInterval = 1000;
	char *s;

	cfg_number(section, "update", timerInterval, 0, -1, &timerInterval);
	debug("Updating display every %dms", timerInterval);

	DROWS = myFrame->yRes;
	DCOLS = myFrame->xRes;
	info("%s: Using SPF with %dx%d pixels.", Name, DCOLS, DROWS);

	s = cfg_get(section, "Font", "6x8");
	if (s == NULL || *s == '\0')
	{
		error("%s: no '%s.Font' entry from %s", Name, section, cfg_source());
		return -1;
	}

	XRES = -1;
	YRES = -1;
	if (sscanf(s, "%dx%d", &XRES, &YRES) != 2 || XRES < 1 || YRES < 1)
	{
		error("%s: bad Font '%s' from %s", Name, s, cfg_source());
		return -1;
	}

	if (XRES < 6 || YRES < 8)
	{
		error("%s: bad Font '%s' from %s (must be at least 6x8)", Name, s, cfg_source());
		return -1;
	}
	free(s);

	/* Allocate framebuffer */
	image.fbsize = myFrame->xRes * myFrame->yRes * sizeof(RGB);
	image.buf = malloc(image.fbsize);
	memset(image.buf, 128, image.fbsize);
	image.dirty = 0;

	/* JPEG buffer is allocated by jpeglib */
	jpegImage.buf = 0;
	jpegImage.size = 0;

	/* regularly transmit the image */
	timer_add(drv_SamsungSPF_timer, NULL, timerInterval, 0);

	return 0;
}



/****************************************/
/***        exported functions        ***/
/****************************************/


/* list models */
int drv_SamsungSPF_list(void)
{
	int i;

	printf("SamsungSPF driver, supported models [");
	for (i = 0; i < numFrames; i++)
	{
		printf("%s", spfDevices[i].type);
		if (i < numFrames - 1)
			printf(", ");
	}
	printf("]\n");

	return 0;
}


/* initialize driver & display */
/* use this function for a graphic display */
int drv_SamsungSPF_init(const char *section, const int quiet)
{
	info("%s: Initializing SPF.", Name);

	char *s;
	int i;

	myDev = 0;
	myFrame = 0;

	// Look for model entry in config
	s = cfg_get(section, "Model", NULL);
	if (s == NULL || *s != '\0')
	{
		s = cfg_get(section, "Model", NULL);
		if (s == NULL || *s == '\0')
		{

			drv_SamsungSPF_list();
			error("%s: no '%s.Model' entry from %s", Name, section, cfg_source());
			return -1;
		}
	}
	// Look for specified device
	for (i = 0; i < numFrames; i++)
	{
		if (strcasecmp(s, spfDevices[i].type) == 0)
		{
			myFrame = &spfDevices[i];
			info("%s: Configured for model %s.", Name, spfDevices[i].type);
			break;
		}
	}

	if (!myFrame)
	{
		drv_SamsungSPF_list();
		error("%s: unknown model '%s'!", Name, s);
		return -1;
	}

	free(s);

	/* try to open USB device */
	drv_SamsungSPF_find();
	while (!myDev)   //endless loop waitung for SPF
	{
		sleep(5);
		drv_SamsungSPF_find();
	}
	if (!myDev)
	{
		error("%s: No Samsung '%s' found!", Name, myFrame->type);
		return -1;
	}

	/* open display and switch to monitor mode if necessary */
	if (drv_SamsungSPF_open() == -1)
		return -1;

	int ret;

	/* real worker functions */
	drv_generic_graphic_real_blit = drv_SamsungSPF_blit;

	/* start display */
	if ((ret = drv_SamsungSPF_start(section)) != 0)
		return ret;

	/* initialize generic graphic driver */
	if ((ret = drv_generic_graphic_init(section, Name)) != 0)
		return ret;

	if (!quiet)
	{
		char buffer[40];
		qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);
		if (drv_generic_graphic_greet(buffer, NULL))
		{
			sleep(3);
			drv_generic_graphic_clear();
		}
	}

	return 0;
}


/* close driver & display */
/* use this function for a graphic display */
int drv_SamsungSPF_quit(const int quiet)
{

	info("%s: shutting down.", Name);

	/* clear display */
	drv_generic_graphic_clear();

	/* say goodbye... */
	if (!quiet)
	{
		drv_generic_graphic_greet("goodbye!", NULL);
	}

	drv_generic_graphic_quit();

	debug("closing connection");
	printf("%s: Closing driver...\n", Name);
	usb_close(myDevHandle);
	free(myDev);
	free(myDevHandle);

	return (0);
}


/* use this one for a graphic display */
DRIVER drv_SamsungSPF =
{
	.name = Name,
	.list = drv_SamsungSPF_list,
	.init = drv_SamsungSPF_init,
	.quit = drv_SamsungSPF_quit,
};