/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/nsc/gfx/init_gu1.c,v 1.1 2002/12/10 15:12:27 alanh Exp $ */ /* * $Workfile: init_gu1.c $ * * This file contains routines used in the initialization of Geode-family * processors. * * 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 */ unsigned char gfx_gxm_config_read(unsigned char index); unsigned long gu1_get_core_freq(void); unsigned long gu1_detect_cpu(void); unsigned long gu1_detect_video(void); unsigned long gu1_get_cpu_register_base(void); unsigned long gu1_get_graphics_register_base(void); unsigned long gu1_get_frame_buffer_base(void); unsigned long gu1_get_frame_buffer_size(void); unsigned long gu1_get_vid_register_base(void); unsigned long gu1_get_vip_register_base(void); /*----------------------------------------------------------------------------- * gfx_gxm_config_read * * This routine reads the value of the specified GXm configuration register. *----------------------------------------------------------------------------- */ unsigned char gfx_gxm_config_read(unsigned char index) { unsigned char value = 0xFF; unsigned char lock; OUTB(0x22, GXM_CONFIG_CCR3); lock = INB(0x23); OUTB(0x22, GXM_CONFIG_CCR3); OUTB(0x23, (unsigned char)(lock | 0x10)); OUTB(0x22, index); value = INB(0x23); OUTB(0x22, GXM_CONFIG_CCR3); OUTB(0x23, lock); return (value); } /*----------------------------------------------------------------------------- * gfx_get_core_freq * * This routine returns the core clock frequency of a GXm if valid jumper settings are * detected; 0 if not. It assumes that a 33.3 MHz PCI clock is being used. *----------------------------------------------------------------------------- */ #if GFX_INIT_DYNAMIC unsigned long gu1_get_core_freq(void) #else unsigned long gfx_get_core_freq(void) #endif { unsigned char dir0, dir1; dir0 = gfx_gxm_config_read(GXM_CONFIG_DIR0) & 0x0F; dir1 = gfx_gxm_config_read(GXM_CONFIG_DIR1); /* REVISION 4.0 AND UP */ if (dir1 >= 0x50) { switch (dir0) { case 0: case 2: return 133; case 5: return 166; case 3: return 200; case 6: return 233; case 7: return 266; case 4: return 300; case 1: return 333; default: return (0); } } else { switch (dir0) { case 0: case 2: return 133; case 7: return 166; case 1: case 3: return 200; case 4: case 6: return 233; case 5: return 266; default: return (0); } } return (0); } /*----------------------------------------------------------------------------- * gfx_get_cpu_register_base * * This routine returns the base address for graphics registers. *----------------------------------------------------------------------------- */ #if GFX_INIT_DYNAMIC unsigned long gu1_get_cpu_register_base(void) #else unsigned long gfx_get_cpu_register_base(void) #endif { unsigned long base; base = (unsigned long)gfx_gxm_config_read(GXM_CONFIG_GCR); base = (base & 0x03) << 30; return (base); } /*----------------------------------------------------------------------------- * gfx_get_frame_buffer_base * * This routine returns the base address for graphics memory. This is an * offset of 0x00800000 from the base address specified in the GCR register. * * The function returns zero if the GCR indicates the graphics subsystem * is disabled. *----------------------------------------------------------------------------- */ #if GFX_INIT_DYNAMIC unsigned long gu1_get_frame_buffer_base(void) #else unsigned long gfx_get_frame_buffer_base(void) #endif { unsigned long base; base = (unsigned long)gfx_gxm_config_read(GXM_CONFIG_GCR); base = (base & 0x03) << 30; if (base) base |= 0x00800000; return (base); } /*----------------------------------------------------------------------------- * gfx_get_frame_buffer_size * * This routine returns the total size of graphics memory, in bytes. * * Currently this routine is hardcoded to return 2 Meg. *----------------------------------------------------------------------------- */ #if GFX_INIT_DYNAMIC unsigned long gu1_get_frame_buffer_size(void) #else unsigned long gfx_get_frame_buffer_size(void) #endif { #if FB4MB return (0x00400000); #else return (0x00200000); #endif } /*----------------------------------------------------------------------------- * gfx_get_vid_register_base * * This routine returns the base address for the video hardware. It assumes * an offset of 0x00010000 from the base address specified by the GCR. * * The function returns zero if the GCR indicates the graphics subsystem * is disabled. *----------------------------------------------------------------------------- */ #if GFX_INIT_DYNAMIC unsigned long gu1_get_vid_register_base(void) #else unsigned long gfx_get_vid_register_base(void) #endif { unsigned long base; base = (unsigned long)gfx_gxm_config_read(GXM_CONFIG_GCR); base = (base & 0x03) << 30; if (base) base |= 0x00010000; return (base); } /*----------------------------------------------------------------------------- * gfx_get_vip_register_base * * This routine returns the base address for the VIP hardware. This is * only applicable to the SC1200, for which this routine assumes an offset * of 0x00015000 from the base address specified by the GCR. * * The function returns zero if the GCR indicates the graphics subsystem * is disabled. *----------------------------------------------------------------------------- */ #if GFX_INIT_DYNAMIC unsigned long gu1_get_vip_register_base(void) #else unsigned long gfx_get_vip_register_base(void) #endif { unsigned long base = 0; if ((gfx_cpu_version & 0xFF) == GFX_CPU_SC1200) { base = (unsigned long)gfx_gxm_config_read(GXM_CONFIG_GCR); base = (base & 0x03) << 30; if (base) base |= 0x00015000; } return (base); } /* END OF FILE */