/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/nsc/gfx/gfx_i2c.c,v 1.1 2002/12/10 15:12:25 alanh Exp $ */ /* * $Workfile: gfx_i2c.c $ * * This file contains routines to write to and read from the I2C bus. * * NSC_LIC_ALTERNATIVE_PREAMBLE * * Revision 1.0 * * National Semiconductor Alternative GPL-BSD License * * National Semiconductor Corporation licenses this software * ("Software"): * * Durango * * under one of the two following licenses, depending on how the * Software is received by the Licensee. * * If this Software is received as part of the Linux Framebuffer or * other GPL licensed software, then the GPL license designated * NSC_LIC_GPL applies to this Software; in all other circumstances * then the BSD-style license designated NSC_LIC_BSD shall apply. * * END_NSC_LIC_ALTERNATIVE_PREAMBLE */ /* NSC_LIC_BSD * * National Semiconductor Corporation Open Source License for Durango * * (BSD License with Export Notice) * * Copyright (c) 1999-2001 * National Semiconductor Corporation. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * * * Neither the name of the National Semiconductor Corporation nor * the names of its contributors may be used to endorse or promote * products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * NATIONAL SEMICONDUCTOR CORPORATION OR CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE, * INTELLECTUAL PROPERTY INFRINGEMENT, OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY * OF SUCH DAMAGE. * * EXPORT LAWS: THIS LICENSE ADDS NO RESTRICTIONS TO THE EXPORT LAWS OF * YOUR JURISDICTION. It is licensee's responsibility to comply with * any export regulations applicable in licensee's jurisdiction. Under * CURRENT (2001) U.S. export regulations this software * is eligible for export from the U.S. and can be downloaded by or * otherwise exported or reexported worldwide EXCEPT to U.S. embargoed * destinations which include Cuba, Iraq, Libya, North Korea, Iran, * Syria, Sudan, Afghanistan and any other country to which the U.S. * has embargoed goods and services. * * END_NSC_LIC_BSD */ /* NSC_LIC_GPL * * National Semiconductor Corporation Gnu General Public License for Durango * * (GPL License with Export Notice) * * Copyright (c) 1999-2001 * National Semiconductor Corporation. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted 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 * * In addition to the terms of the GNU General Public License, neither * the name of the National Semiconductor Corporation nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * NATIONAL SEMICONDUCTOR CORPORATION OR CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE, * INTELLECTUAL PROPERTY INFRINGEMENT, OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY * OF SUCH DAMAGE. See the GNU General Public License for more details. * * EXPORT LAWS: THIS LICENSE ADDS NO RESTRICTIONS TO THE EXPORT LAWS OF * YOUR JURISDICTION. It is licensee's responsibility to comply with * any export regulations applicable in licensee's jurisdiction. Under * CURRENT (2001) U.S. export regulations this software * is eligible for export from the U.S. and can be downloaded by or * otherwise exported or reexported worldwide EXCEPT to U.S. embargoed * destinations which include Cuba, Iraq, Libya, North Korea, Iran, * Syria, Sudan, Afghanistan and any other country to which the U.S. * has embargoed goods and services. * * You should have received a copy of the GNU General Public License * along with this file; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * END_NSC_LIC_GPL */ /* INCLUDE ROUTINES FOR ACCESS.BUS, IF SPECIFIED */ /* This is for SC1200 systems. */ #if GFX_I2C_ACCESS #include "i2c_acc.c" #endif /* INCLUDE ROUTINES FOR CS5530 GPIOs, IF SPECIFIED */ /* This is for GXLV systems that use GPIOs on the CS5530 for I2C. */ #if GFX_I2C_GPIO #include "i2c_gpio.c" #endif /* WRAPPERS IF DYNAMIC SELECTION */ /* Extra layer to call either ACCESS.bus or GPIO routines. */ #if GFX_I2C_DYNAMIC /*--------------------------------------------------------------------------- * gfx_i2c_reset *--------------------------------------------------------------------------- */ int gfx_i2c_reset(unsigned char busnum, short adr, char freq) { int status = GFX_STATUS_UNSUPPORTED; #if GFX_I2C_ACCESS if (gfx_i2c_type & GFX_I2C_TYPE_ACCESS) status = acc_i2c_reset(busnum, adr, freq); #endif #if GFX_I2C_GPIO if (gfx_i2c_type & GFX_I2C_TYPE_GPIO) status = gpio_i2c_reset(busnum, adr, freq); #endif return (status); } /*--------------------------------------------------------------------------- * gfx_i2c_select_gpio *--------------------------------------------------------------------------- */ int gfx_i2c_select_gpio(int clock, int data) { #if GFX_I2C_ACCESS if (gfx_i2c_type & GFX_I2C_TYPE_ACCESS) acc_i2c_select_gpio(clock, data); #endif #if GFX_I2C_GPIO if (gfx_i2c_type & GFX_I2C_TYPE_GPIO) gpio_i2c_select_gpio(clock, data); #endif return (0); } /*--------------------------------------------------------------------------- * gfx_i2c_write *--------------------------------------------------------------------------- */ int gfx_i2c_write(unsigned char busnum, unsigned char chipadr, unsigned char subadr, unsigned char bytes, unsigned char *data) { int status = -1; #if GFX_I2C_ACCESS if (gfx_i2c_type & GFX_I2C_TYPE_ACCESS) status = acc_i2c_write(busnum, chipadr, subadr, bytes, data); #endif #if GFX_I2C_GPIO if (gfx_i2c_type & GFX_I2C_TYPE_GPIO) status = gpio_i2c_write(busnum, chipadr, subadr, bytes, data); #endif return (status); } /*--------------------------------------------------------------------------- * gfx_i2c_read *--------------------------------------------------------------------------- */ int gfx_i2c_read(unsigned char busnum, unsigned char chipadr, unsigned char subadr, unsigned char bytes, unsigned char *data) { int status = -1; #if GFX_I2C_ACCESS if (gfx_i2c_type & GFX_I2C_TYPE_ACCESS) status = acc_i2c_read(busnum, chipadr, subadr, bytes, data); #endif #if GFX_I2C_GPIO if (gfx_i2c_type & GFX_I2C_TYPE_GPIO) status = gpio_i2c_read(busnum, chipadr, subadr, bytes, data); #endif return (status); } /*--------------------------------------------------------------------------- * gfx_i2c_init *--------------------------------------------------------------------------- */ int gfx_i2c_init(void) { int status = -1; #if GFX_I2C_ACCESS if (gfx_i2c_type & GFX_I2C_TYPE_ACCESS) status = acc_i2c_init(); #endif #if GFX_I2C_GPIO if (gfx_i2c_type & GFX_I2C_TYPE_GPIO) status = gpio_i2c_init(); #endif return (status); } /*--------------------------------------------------------------------------- * gfx_i2c_cleanup *--------------------------------------------------------------------------- */ void gfx_i2c_cleanup(void) { #if GFX_I2C_ACCESS if (gfx_i2c_type & GFX_I2C_TYPE_ACCESS) acc_i2c_cleanup(); #endif #if GFX_I2C_GPIO if (gfx_i2c_type & GFX_I2C_TYPE_GPIO) gpio_i2c_cleanup(); #endif } #endif /* GFX_I2C_DYNAMIC */ /* END OF FILE */