gammu updates

4 files changed, 447 insertions, 25 deletions

diff --git a/gammu/emb/common/device/serial/ser_djg.c b/gammu/emb/common/device/serial/ser_djg.c
index 2524187..609deb8 100644
--- a/gammu/emb/common/device/serial/ser_djg.c
+++ b/gammu/emb/common/device/serial/ser_djg.c
@@ -1,68 +1,437 @@
+/* Some sources from SVAsync (c) 1996, 1997, Samuel Vincent
+ * 7337 Carioca Ct, Rohnert Park, Ca 94928
+ * "you may freely use it in your programs without paying me anything"
+ */
+/* Some sources from DZCOMM */
 
 #include "../../gsmstate.h"
 
 #ifdef GSM_ENABLE_SERIALDEVICE
 #ifdef DJGPP
 
 #include "../../gsmcomon.h"
+#include "../../misc/coding/coding.h"
 #include "ser_djg.h"
 
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <dos.h>
+#include <dpmi.h>
+#include <pc.h>
+#include <go32.h>
+#include <sys/farptr.h>
+#include <sys/movedata.h>
+#include <conio.h>
+
+extern unsigned short __djgpp_ds_alias;
+extern void SVAsyncProtISR(void);
+
+static unsigned char SVAsyncStatus=0;
+
+static void lock_interrupt_memory(void);
+static void unlock_interrupt_memory(void);
+
+#define Ctrl8259_0 	0x020           /* 8259 port */
+#define Ctrl8259_1 	0x021           /* 8259 port (Masks) */
+#define BufSize 	32768           /* Buffer Size */
+
+static unsigned char VectorNum;         /* Vector Number */
+static unsigned char EnableIRQ;         /* Mask to enable 8259 IRQ */
+static unsigned char DisableIRQ;        /* Mask to disable 8259 IRQ */
+static _go32_dpmi_seginfo ProtVector;   /* Old Protmode Vector */
+static _go32_dpmi_seginfo info;         /* New Protmode Vector */
+
+/* Register Addresses for the UART */
+static unsigned short Port;             /* Port Base Address */
+unsigned short THR;                     /* Transmitter Holding Register */
+unsigned short RDR;                     /* Reciever Data Register */
+unsigned short BRDL;                    /* Baud Rate Divisor, Low byte */
+unsigned short BRDH;                    /* Baud Rate Divisor, High Byte */
+unsigned short IER;                     /* Interupt Enable Register */
+unsigned short IIR;                     /* Interupt Identification Register */
+unsigned short FCR;                     /* FIFO Control Register */
+unsigned short LCR;                     /* Line Control Register */
+unsigned short MCR;                     /* Modem Control Register */
+unsigned short LSR;                     /* Line Status Register */
+unsigned short MSR;                     /* Modem Status Register */
+unsigned short SCR;                     /* SCR Register */
+
+/* Data Buffer */
+unsigned volatile char 	RecBuffer[BufSize] = { 0 };
+unsigned volatile int 	RecHead, RecTail;
+
+/* This uninstalls the ISR and resets the serial port. */
+static void SVAsyncStop(void) 
+{
+	if(!SVAsyncStatus) return;
+	SVAsyncStatus = 0;
+
+	/***** Mask (disable) 8259 IRQ Interrupt */
+	outportb(Ctrl8259_1, (inportb(Ctrl8259_1) | DisableIRQ));
+
+	/***** Disable 8250 interrupt */
+	outportb(LCR, (inportb(LCR) & 0x7F));
+	outportb(IER, 0);
+
+	/***** Set bit 3 in MCR to 0 */
+	outportb(MCR, (inportb(MCR) & 0xF7));
+
+	/***** Interrupts are disabled.  Restore saved interrupt vector. */
+	_go32_dpmi_set_protected_mode_interrupt_vector(VectorNum, &ProtVector);
+}
+
+/* This will empty the receive buffer */
+static void SVAsyncClear(void) 
+{
+	disable();
+	RecHead = 0;
+	RecTail = 0;
+	enable();
+}
+
+
+/* Sets communication parameters
+ * Baud = 150, 300, 600, 1200, 2400, 4800, 9600, 19200, 28800, 38400, 57600
+ * Control = The value to place in the LCR
+ */
+void SVAsyncSet(unsigned int Baud, unsigned int Control) 
+{
+	int 		divisor;
+	unsigned char 	divlow, divhigh;
+
+	if (!Baud) return;
+	
+	divisor = 115200 / Baud;
+
+	disable();
+	
+	outportb(LCR, Control | 0x80); 		/* Set Port Toggle to BRDL/BRDH registers */
+	divlow = divisor & 0x000000ff;
+	divhigh = (divisor >> 8) & 0x000000ff;
+	outportb(BRDL, divlow);     		/* Set Baud Rate */
+	outportb(BRDH, divhigh);
+
+	outportb(LCR, Control & 0x007F);        /* Set LCR and Port Toggle */
+
+	enable();
+}
+
+/* Sets various handshaking lines */
+void SVAsyncHand(unsigned int Hand) 
+{
+	outportb(MCR, Hand | 0x08);  /* Keep interrupt enable ON */
+}
+
+static void lock_interrupt_memory(void) 
+{
+	int 		errval;
+	__dpmi_meminfo 	info;
+	unsigned long 	address;
+	
+	__dpmi_get_segment_base_address(_my_ds(), &address);
+
+	info.address = (int) address + (int) &RDR;
+	info.size = sizeof(RDR);
+	errval = __dpmi_lock_linear_region(&info);
+	if(errval == -1) printf("Error in locking memory\n!");
+
+	info.address = (int) address + (int) &LSR;
+	info.size = sizeof(LSR);
+	errval = __dpmi_lock_linear_region(&info);
+	if(errval == -1) printf("Error in locking memory\n!");
+
+	info.address = (int) address + (int) &RecHead;
+	info.size = sizeof(RecHead);
+	errval = __dpmi_lock_linear_region(&info);
+	if(errval == -1) printf("Error in locking memory\n!");
+
+	info.address = (int) address + (int) &RecBuffer;
+	info.size = sizeof(RecBuffer);
+	errval = __dpmi_lock_linear_region(&info);
+	if(errval == -1) printf("Error in locking memory\n!");
+
+	info.address = (int) address + (int) RecBuffer;
+	info.size = BufSize;
+	errval = __dpmi_lock_linear_region(&info);
+	if(errval == -1) printf("Error in locking memory\n!");
+	
+	__dpmi_get_segment_base_address(_my_cs(), &address);
+	
+	info.address = (int) address + (int) SVAsyncProtISR;
+	info.size = 4096; /* 4096 bytes is probably overkill. */
+	errval = __dpmi_lock_linear_region(&info);
+	if(errval == -1) printf("Error in locking memory\n!");
+}
+
+static void unlock_interrupt_memory(void) 
+{
+	__dpmi_meminfo 	info;
+	unsigned long 	address;
+	
+	__dpmi_get_segment_base_address(_my_ds(), &address);
+	info.address = (int) address + (int) &RDR;
+	info.size = sizeof(RDR);
+	__dpmi_unlock_linear_region(&info);
+	info.address = (int) address + (int) &LSR;
+	info.size = sizeof(LSR);
+	__dpmi_unlock_linear_region(&info);
+	info.address = (int) address + (int) &RecHead;
+	info.size = sizeof(RecHead);
+	__dpmi_unlock_linear_region(&info);
+	info.address = (int) address + (int) &RecBuffer;
+	info.size = sizeof(RecBuffer);
+	__dpmi_unlock_linear_region(&info);
+	info.address = (int) address + (int) RecBuffer;
+	info.size = BufSize;
+	__dpmi_unlock_linear_region(&info);
+	
+	__dpmi_get_segment_base_address(_my_cs(), &address);
+	
+	info.address = (int) address + (int) SVAsyncProtISR;
+	info.size = 4096; /* probably overkill */
+	__dpmi_unlock_linear_region(&info);
+}
+
 static GSM_Error serial_close(GSM_StateMachine *s)
 {
-    	GSM_Device_SerialData *d = &s->Device.Data.Serial;
+	SVAsyncStop();
 
-	return ERR_NOTIMPLEMENTED;
+	return ERR_NONE;
 }
 
 static GSM_Error serial_open (GSM_StateMachine *s)
 {
-    	GSM_Device_SerialData *d = &s->Device.Data.Serial;
-    
-	return ERR_NOTIMPLEMENTED;
+    	GSM_Device_SerialData 	*d = &s->Device.Data.Serial;
+	unsigned char 		temp;
+	int			i;
+
+	/**** Set various things according to com port number */
+	if (mystrncasecmp(s->CurrentConfig->Device,"com1:",0)) {
+		Port 		= 0x03F8;
+		VectorNum 	= 0x0C;
+		EnableIRQ 	= 0xEF;
+		DisableIRQ 	= 0x10;
+	} else if (mystrncasecmp(s->CurrentConfig->Device,"com2:",0)) {
+		Port 		= 0x02F8;
+		VectorNum 	= 0x0B;
+		EnableIRQ 	= 0xF7;
+		DisableIRQ 	= 0x08;
+	} else if (mystrncasecmp(s->CurrentConfig->Device,"com3:",0)) {
+		Port 		= 0x03E8;
+		VectorNum 	= 0x0C;
+		EnableIRQ 	= 0xEF;
+		DisableIRQ 	= 0x10;
+	} else if (mystrncasecmp(s->CurrentConfig->Device,"com4:",0)) {
+		Port 		= 0x02E8;
+		VectorNum 	= 0x0B;
+		EnableIRQ 	= 0xF7;
+		DisableIRQ 	= 0x08;
+	} else return ERR_NOTSUPPORTED;
+
+	/**** Compute Register locations */	
+	THR 	= Port;
+	RDR 	= Port;
+	BRDL 	= Port;
+	BRDH 	= 1 + Port;
+	IER 	= 1 + Port;
+	IIR 	= 2 + Port;
+	FCR 	= 2 + Port;
+	LCR 	= 3 + Port;
+	MCR 	= 4 + Port;
+	LSR 	= 5 + Port;
+	MSR 	= 6 + Port;
+	SCR 	= 7 + Port;
+
+	/***** Initalize Buffer */
+	SVAsyncClear();
+	
+	lock_interrupt_memory();
+	atexit(unlock_interrupt_memory);
+	/***** Set bit 3 in MCR to 0 */
+	outportb(MCR, (inportb(MCR) & 0xF7));
+
+	/*** Save and reassign interrupt vectors */
+	
+	_go32_dpmi_get_protected_mode_interrupt_vector(VectorNum, &ProtVector);
+	
+	info.pm_offset = (int) SVAsyncProtISR;
+	info.pm_selector = _my_cs();
+	_go32_dpmi_set_protected_mode_interrupt_vector(VectorNum, &info);
+	
+	atexit(SVAsyncStop);
+
+	/***** Enable 8259 interrupt (IRQ) line for this async adapter */
+	outportb(Ctrl8259_1, (inportb(Ctrl8259_1) & EnableIRQ));
+
+	/***** Enable 8250 Interrupt-on-data-ready */
+	outportb(LCR, (inportb(LCR) & 0x7F));
+	
+	outportb(IER, 0);
+	if (inportb(IER)) {
+		SVAsyncStatus = 0;
+		return ERR_UNKNOWN;
+	}
+	outportb(IER, 0x01);
+
+	/***** Clear 8250 Status and data registers */
+	do {
+		temp=inportb(RDR);
+		temp=inportb(LSR);
+		temp=inportb(MSR);
+		temp=inportb(IIR);
+	} while(!(temp & 1));
+
+	/***** Set Bit 3 of MCR -- Enable interupts */
+	outportb(MCR, (inportb(MCR) | 0x08));
+
+	SVAsyncStatus = 1;
+	/***** Clear Buffer Just in case */
+	SVAsyncClear();
+
+   	/* Code based on stuff from SVAsync lib.
+    	 * Clear UART Status and data registers
+    	 * setting up FIFO if possible
+    	 */
+   	outportb(SCR, 0x55);
+   	if (inportb(SCR) == 0x55) {
+      		/* On the off chance that SCR is actually hardwired to 0x55,
+	         * do the same check with a different value.
+	         */
+      		outportb(SCR, 0xAA);
+      		if (inportb(SCR) == 0xAA) {
+	 		/* The chip is better than an 8250 - it has a scratch pad */
+	 		outportb(SCR, i); /* Set SCR back to what it was before */
+	 		inportb(SCR);     /* Give slow motherboards a chance    */
+      
+	 		/* Is there a FIFO ? - go through twice for slow motherboards */
+	 		outportb(FCR, 0x01);
+	 		i = inportb(FCR);
+	 		outportb(FCR, 0x01);
+	 		i = inportb(FCR);
+
+	 		/* Some old stuff relies on this (no idea why) */
+	 		outportb(FCR, 0x00);
+	 		inportb(FCR); /* Give slow motherboards a chance */
+
+	 		if ((i&0x80) == 0) {
+				smprintf(s,"UART 16450 or UART 8250 with scratch pad\n");
+	 		} else if ((i&0x40) == 0) {
+				smprintf(s,"UART 16550 - broken FIFO\n");
+	 		} else {
+		    		/* It's a 16450A series : try and start the FIFO.
+		     		* It appears that some chips need a two call protocol, but
+		     		* those that don't seem to work even if you do start it
+		     		* twice. The first call is simply to start it, the second
+		     		* starts it and sets an 8 byte FIFO trigger level.
+		     		*/
+		    		outportb(FCR, 0x01);
+		    		inportb(FCR); /* Give slow motherboards a chance */
+		    		outportb(FCR, 0x87);
+		    		inportb(FCR); /* Give slow motherboards a chance */
+	
+		    		/* Check that the FIFO initialised */
+		    		if ((inportb(IIR) & 0xc0) != 0xc0) {
+			       		/*
+					 * It didn't so we assume it isn't there but disable it to
+					 * be on the safe side.
+					 */
+			       		outportb(IIR, 0xfe);
+			       		inportb(IIR); /* Give slow motherboards a chance */
+					smprintf(s,"UART 16450A - FIFO disabled\n");
+				} else {
+					smprintf(s,"UART 16450A - FIFO enabled\n");
+				}
+			}
+		} else {
+			smprintf(s,"UART 8250\n");
+		}
+	}
+
+	d->Control 	= BITS_8 | STOP_1;
+	d->Parity 	= false;
+	d->Speed 	= 9600;
+	SVAsyncSet(d->Speed,d->Control | NO_PARITY);
+
+	return ERR_NONE;
 }
 
 static GSM_Error serial_setparity(GSM_StateMachine *s, bool parity)
 {
     	GSM_Device_SerialData *d = &s->Device.Data.Serial;
 
-	return ERR_NOTIMPLEMENTED;
+	d->Parity = parity;
+
+	if (parity) {
+		SVAsyncSet(d->Speed, d->Control | ODD_PARITY);
+	} else {
+		SVAsyncSet(d->Speed, d->Control | NO_PARITY);
+	}
+
+	return ERR_NONE;
 }
 
 static GSM_Error serial_setdtrrts(GSM_StateMachine *s, bool dtr, bool rts)
 {
-    	GSM_Device_SerialData *d = &s->Device.Data.Serial;
+	if (dtr && rts) {
+		SVAsyncHand(DTR | RTS);
+	} else if (dtr) {
+		SVAsyncHand(DTR);
+	} else if (rts) {
+		SVAsyncHand(RTS);
+	} else {
+		SVAsyncHand(0);
+	}
 
-	return ERR_NOTIMPLEMENTED;
+	return ERR_NONE;
 }
 
 static GSM_Error serial_setspeed(GSM_StateMachine *s, int speed)
 {
     	GSM_Device_SerialData *d = &s->Device.Data.Serial;
 
-	return ERR_NOTIMPLEMENTED;
+	d->Speed = speed;
+
+	if (d->Parity) {
+		SVAsyncSet(d->Speed, d->Control | ODD_PARITY);
+	} else {
+		SVAsyncSet(d->Speed, d->Control | NO_PARITY);
+	}
+
+	return ERR_NONE;
 }
 
-static int serial_read(GSM_StateMachine *s, void *buf, size_t nbytes)
+static int serial_read(GSM_StateMachine *s, char *buf, size_t nbytes)
 {
-    	GSM_Device_SerialData *d = &s->Device.Data.Serial;
+	if(RecTail == RecHead) return 0;
+
+	disable();
+        buf[0] = RecBuffer[RecTail++];
+	if(RecTail >= BufSize) RecTail = 0;
+	enable();
 
-    	return 0;
+	return 1;
 }
 
-static int serial_write(GSM_StateMachine *s, void *buf, size_t nbytes)
+static int serial_write(GSM_StateMachine *s, char *buf, size_t nbytes)
 {
-    	GSM_Device_SerialData *d = &s->Device.Data.Serial;
+	int i;
+
+	for (i=0;i<nbytes;i++) {
+		while(~inportb(LSR) & 0x20);
+		outportb(THR, buf[i]);
+	}
 
-    	return 0;
+    	return i;
 }
 
 GSM_Device_Functions SerialDevice = {
 	serial_open,
 	serial_close,
 	serial_setparity,
 	serial_setdtrrts,
 	serial_setspeed,
 	serial_read,
 	serial_write
 };
 
diff --git a/gammu/emb/common/device/serial/ser_djg.h b/gammu/emb/common/device/serial/ser_djg.h
index b35b282..3bb2a5b 100644
--- a/gammu/emb/common/device/serial/ser_djg.h
+++ b/gammu/emb/common/device/serial/ser_djg.h
@@ -1,15 +1,50 @@
+/* Some sources from SVAsync (c) 1996, 1997, Samuel Vincent
+ * 7337 Carioca Ct, Rohnert Park, Ca 94928
+ * "you may freely use it in your programs without paying me anything"
+ */
 
 #ifdef DJGPP
 #ifndef djgppserial_h
 #define djgppserial_h
 
 typedef struct {
-	int 	hPhone;
+	int 		hPhone;
+	int 		Speed;
+	unsigned int 	Control;
+	bool		Parity;
 } GSM_Device_SerialData;
 
+/* Defines for Com Port Paramaters, the second paramater to SVAsyncSet() */
+#define BITS_8          0x03
+#define BITS_7          0x02
+#define STOP_1          0x00
+#define STOP_2          0x04
+#define EVEN_PARITY     0x18
+#define ODD_PARITY      0x08
+#define NO_PARITY       0x00
+
+/* Defines for SVAsyncHand() */
+#define DTR             0x01
+#define RTS             0x02
+#define USER            0x04
+#define LOOPBACK        0x10
+
+/* Defines for SVAsyncStat() */
+#define D_CTS   	0x0100
+#define D_DSR   	0x0200
+#define D_RI            0x0400
+#define D_DCD   	0x0800
+#define CTS             0x1000
+#define DSR             0x2000
+#define RI              0x4000
+#define DCD             0x8000
+#define PARITY  	0x0004
+#define THREMPTY        0x0020
+#define BREAKDET        0x1000
+
 #endif
 #endif
 
 /* How should editor hadle tabs in this file? Add editor commands here.
  * vim: noexpandtab sw=8 ts=8 sts=8:
  */
diff --git a/gammu/emb/common/device/serial/ser_unx.c b/gammu/emb/common/device/serial/ser_unx.c
index 69c7515..18b5f6f 100644
--- a/gammu/emb/common/device/serial/ser_unx.c
+++ b/gammu/emb/common/device/serial/ser_unx.c
@@ -1,18 +1,27 @@
 /* (c) 2002-2004 by Marcin Wiacek */
 /* locking device and settings all speeds by Michal Cihar */
 /* based on some work from Gnokii (www.gnokii.org)
  * (C) 1999-2000 Hugh Blemings & Pavel Janik ml. (C) 2001-2004 Pawel Kot 
  * GNU GPL version 2 or later
  */
+/* Due to a problem in the source code management, the names of some of
+ * the authors have unfortunately been lost. We do not mean to belittle
+ * their efforts and hope they will contact us to see their names
+ * properly added to the Copyright notice above.
+ * Having published their contributions under the terms of the GNU
+ * General Public License (GPL) [version 2], the Copyright of these
+ * authors will remain respected by adhering to the license they chose
+ * to publish their code under.
+ */
 
 #include "../../gsmstate.h"
 
 #ifdef GSM_ENABLE_SERIALDEVICE
 #ifndef WIN32
 #ifndef DJGPP
 
 #include <sys/file.h>
 #include <sys/time.h>
 #include <string.h>
 #include <termios.h>
 #include <errno.h>
@@ -51,26 +60,26 @@ static GSM_Error serial_close(GSM_StateMachine *s)
 	/* Restores old settings */
 	tcsetattr(d->hPhone, TCSANOW, &d->old_settings);
 
 	/* Closes device */
 	close(d->hPhone);
 
 	return ERR_NONE;
 }
 
 static GSM_Error serial_open (GSM_StateMachine *s)
 {
 	GSM_Device_SerialData   *d = &s->Device.Data.Serial;
-	struct termios	  t;
-	int			    i;
+	struct termios	  	t;
+	int			i;
 
 	/* O_NONBLOCK MUST is required to avoid waiting for DCD */
 	d->hPhone = open(s->CurrentConfig->Device, O_RDWR | O_NOCTTY | O_NONBLOCK);
 	if (d->hPhone < 0) {
 		i = errno;
 		GSM_OSErrorInfo(s,"open in serial_open");
 		if (i ==  2) return ERR_DEVICENOTEXIST;		//no such file or directory
 		if (i == 13) return ERR_DEVICENOPERMISSION;	//permission denied
 		return ERR_DEVICEOPENERROR;
 	}
 
 #ifdef TIOCEXCL
@@ -115,25 +124,25 @@ static GSM_Error serial_open (GSM_StateMachine *s)
     	if (fcntl(d->hPhone, F_SETFL, FASYNC | FNONBLOCK) == -1) {
 		serial_close(s);
 		GSM_OSErrorInfo(s,"fcntl in serial_open");
 		return ERR_DEVICEOPENERROR;
     	}
 
     	return ERR_NONE;
 }
 
 static GSM_Error serial_setparity(GSM_StateMachine *s, bool parity)
 {
     	GSM_Device_SerialData   *d = &s->Device.Data.Serial;
-    	struct termios	  t;
+    	struct termios	  	t;
 
     	if (tcgetattr(d->hPhone, &t)) {
 		GSM_OSErrorInfo(s,"tcgetattr in serial_setparity");
 		return ERR_DEVICEREADERROR;
     	}
 
     	if (parity) {
 		t.c_cflag |= (PARENB | PARODD);
 		t.c_iflag = 0;
     	} else {
 		t.c_iflag = IGNPAR;
     	}
@@ -141,26 +150,26 @@ static GSM_Error serial_setparity(GSM_StateMachine *s, bool parity)
     	if (tcsetattr(d->hPhone, TCSANOW, &t) == -1){
 		serial_close(s);
 		GSM_OSErrorInfo(s,"tcsetattr in serial_setparity");
 		return ERR_DEVICEPARITYERROR;
     	}
 
     	return ERR_NONE;
 }
 
 static GSM_Error serial_setdtrrts(GSM_StateMachine *s, bool dtr, bool rts)
 {
     	GSM_Device_SerialData   *d = &s->Device.Data.Serial;
-    	struct termios	  t;
-    	unsigned int	    flags;
+    	struct termios	  	t;
+    	unsigned int	    	flags;
 
     	if (tcgetattr(d->hPhone, &t)) {
 		GSM_OSErrorInfo(s,"tcgetattr in serial_setdtrrts");
 		return ERR_DEVICEREADERROR;
     	}
 
 #ifdef CRTSCTS
     	/* Disabling hardware flow control */
     	t.c_cflag &= ~CRTSCTS;
 #endif
 
     	if (tcsetattr(d->hPhone, TCSANOW, &t) == -1) {
@@ -255,45 +264,45 @@ static GSM_Error serial_setspeed(GSM_StateMachine *s, int speed)
 		serial_close(s);
 		GSM_OSErrorInfo(s,"tcsetattr in serial_setspeed");
 		return ERR_DEVICECHANGESPEEDERROR;
     	}
 
     	return ERR_NONE;
 }
 
 static int serial_read(GSM_StateMachine *s, void *buf, size_t nbytes)
 {
     	GSM_Device_SerialData 		*d = &s->Device.Data.Serial;
     	struct timeval  		timeout2;
-    	fd_set	  		readfds;
-    	int	     		actual = 0;
+    	fd_set	  			readfds;
+    	int	     			actual = 0;
 
     	FD_ZERO(&readfds);
     	FD_SET(d->hPhone, &readfds);
 
     	timeout2.tv_sec     = 0;
     	timeout2.tv_usec    = 1;
 
     	if (select(d->hPhone+1, &readfds, NULL, NULL, &timeout2)) {
 		actual = read(d->hPhone, buf, nbytes);
 		if (actual == -1) GSM_OSErrorInfo(s,"serial_read");
     	}
     	return actual;
 }
 
 static int serial_write(GSM_StateMachine *s, void *buf, size_t nbytes)
 {
     	GSM_Device_SerialData   *d = &s->Device.Data.Serial;
-    	int		     ret;
-    	size_t		  actual = 0;
+    	int		     	ret;
+    	size_t		  	actual = 0;
 
     	do {
 		ret = write(d->hPhone, (unsigned char *)buf, nbytes - actual);
 		if (ret < 0 && errno == EAGAIN) continue;
 		if (ret < 0) {
 	    		if (actual != nbytes) GSM_OSErrorInfo(s,"serial_write");
 	    		return actual;
 		}
 		actual  += ret;
 		buf     += ret;
     		if (s->ConnectionType == GCT_FBUS2PL2303) my_sleep(1);
     	} while (actual < nbytes);
diff --git a/gammu/emb/common/device/serial/ser_w32.c b/gammu/emb/common/device/serial/ser_w32.c
index 7d88fc7..a7919fe 100644
--- a/gammu/emb/common/device/serial/ser_w32.c
+++ b/gammu/emb/common/device/serial/ser_w32.c
@@ -1,18 +1,27 @@
 /* (c) 2002-2004 by Marcin Wiacek */
 /* based on some work from MSDN and others */
 /* based on some work from Gnokii (www.gnokii.org)
  * (C) 1999-2000 Hugh Blemings & Pavel Janik ml. (C) 2001-2004 Pawel Kot 
  * GNU GPL version 2 or later
  */
+/* Due to a problem in the source code management, the names of some of
+ * the authors have unfortunately been lost. We do not mean to belittle
+ * their efforts and hope they will contact us to see their names
+ * properly added to the Copyright notice above.
+ * Having published their contributions under the terms of the GNU
+ * General Public License (GPL) [version 2], the Copyright of these
+ * authors will remain respected by adhering to the license they chose
+ * to publish their code under.
+ */
 
 #include "../../gsmstate.h"
 
 #ifdef GSM_ENABLE_SERIALDEVICE
 #ifdef WIN32
 
 #include <windows.h>
 #include <string.h>
 #include <stdio.h>
 #include <io.h>
 #include <memory.h>