Commit fa766c9b authored by Igor M. Liplianin's avatar Igor M. Liplianin Committed by Mauro Carvalho Chehab
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[media] Altera FPGA firmware download module 



It uses STAPL files and programs Altera FPGA through JTAG.
Interface to JTAG must be provided from main device module,
for example through cx23885 GPIO.

Signed-off-by: default avatarIgor M. Liplianin <liplianin@netup.ru>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent f72cfd85

drivers/staging/Kconfig

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Original line number Diff line number Diff line
@@ -175,5 +175,7 @@ source "drivers/staging/cptm1217/Kconfig" 


source "drivers/staging/ste_rmi4/Kconfig"



source "drivers/staging/altera-stapl/Kconfig"



endif # !STAGING_EXCLUDE_BUILD

endif # STAGING

drivers/staging/Makefile

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Original line number Diff line number Diff line
@@ -66,5 +66,6 @@ obj-$(CONFIG_BCM_WIMAX) += bcm/ 
obj-$(CONFIG_FT1000)		+= ft1000/

obj-$(CONFIG_SND_INTEL_SST)		+= intel_sst/

obj-$(CONFIG_SPEAKUP)	+= speakup/

obj-$(CONFIG_ALTERA_STAPL)	+=altera-stapl/

obj-$(CONFIG_TOUCHSCREEN_CLEARPAD_TM1217)	+= cptm1217/

obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4)	+= ste_rmi4/

drivers/staging/altera-stapl/Kconfig

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comment "Altera FPGA firmware download module"



config ALTERA_STAPL

	tristate "Altera FPGA firmware download module"

	depends on I2C

	default n

	help

	  An Altera FPGA module. Say Y when you want to support this tool.

drivers/staging/altera-stapl/Makefile

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altera-stapl-objs = altera-lpt.o altera-jtag.o altera-comp.o altera.o



obj-$(CONFIG_ALTERA_STAPL) += altera-stapl.o

drivers/staging/altera-stapl/altera-comp.c

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Original line number Diff line number Diff line 
/*

 * altera-comp.c

 *

 * altera FPGA driver

 *

 * Copyright (C) Altera Corporation 1998-2001

 * Copyright (C) 2010 NetUP Inc.

 * Copyright (C) 2010 Igor M. Liplianin <liplianin@netup.ru>

 *

 * 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 2 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, write to the Free Software

 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */



#include <linux/kernel.h>

#include "altera-exprt.h"



#define	SHORT_BITS		16

#define	CHAR_BITS		8

#define	DATA_BLOB_LENGTH	3

#define	MATCH_DATA_LENGTH	8192

#define ALTERA_REQUEST_SIZE	1024

#define ALTERA_BUFFER_SIZE	(MATCH_DATA_LENGTH + ALTERA_REQUEST_SIZE)



static u32 altera_bits_req(u32 n)

{

	u32 result = SHORT_BITS;



	if (n == 0)

		result = 1;

	else {

		/* Look for the highest non-zero bit position */

		while ((n & (1 << (SHORT_BITS - 1))) == 0) {

			n <<= 1;

			--result;

		}

	}



	return result;

}



static u32 altera_read_packed(u8 *buffer, u32 bits, u32 *bits_avail,

							u32 *in_index)

{

	u32 result = 0;

	u32 shift = 0;

	u32 databyte = 0;



	while (bits > 0) {

		databyte = buffer[*in_index];

		result |= (((databyte >> (CHAR_BITS - *bits_avail))

			& (0xff >> (CHAR_BITS - *bits_avail))) << shift);



		if (bits <= *bits_avail) {

			result &= (0xffff >> (SHORT_BITS - (bits + shift)));

			*bits_avail -= bits;

			bits = 0;

		} else {

			++(*in_index);

			shift += *bits_avail;

			bits -= *bits_avail;

			*bits_avail = CHAR_BITS;

		}

	}



	return result;

}



u32 altera_shrink(u8 *in, u32 in_length, u8 *out, u32 out_length, s32 version)

{

	u32 i, j, data_length = 0L;

	u32 offset, length;

	u32 match_data_length = MATCH_DATA_LENGTH;

	u32 bits_avail = CHAR_BITS;

	u32 in_index = 0L;



	if (version > 0)

		--match_data_length;



	for (i = 0; i < out_length; ++i)

		out[i] = 0;



	/* Read number of bytes in data. */

	for (i = 0; i < sizeof(in_length); ++i) {

		data_length = data_length | (

			altera_read_packed(in,

					CHAR_BITS,

					&bits_avail,

					&in_index) << (i * CHAR_BITS));

	}



	if (data_length > out_length) {

		data_length = 0L;

		return data_length;

	}



	i = 0;

	while (i < data_length) {

		/* A 0 bit indicates literal data. */

		if (altera_read_packed(in, 1, &bits_avail,

						&in_index) == 0) {

			for (j = 0; j < DATA_BLOB_LENGTH; ++j) {

				if (i < data_length) {

					out[i] = (u8)altera_read_packed(in,

							CHAR_BITS,

							&bits_avail,

							&in_index);

					i++;

				}

			}

		} else {

			/* A 1 bit indicates offset/length to follow. */

			offset = altera_read_packed(in, altera_bits_req((s16)

					(i > match_data_length ?

						match_data_length : i)),

					&bits_avail,

					&in_index);

			length = altera_read_packed(in, CHAR_BITS,

					&bits_avail,

					&in_index);

			for (j = 0; j < length; ++j) {

				if (i < data_length) {

					out[i] = out[i - offset];

					i++;

				}

			}

		}

	}



	return data_length;

}