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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2012 Google Inc.
*
* 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; version 2 of the License.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "i915_reg.h"
/* One-letter commands for code not meant to be ready for humans.
* The code was generated by a set of programs/scripts.
* M print out a kernel message
* R read a register. We do these mainly to ensure that if hardware wanted
* the register read, it was read; also, in debug, we can see what was expected
* and what was found. This has proven *very* useful to get this debugged.
* The udelay, if non-zero, will make sure there is a
* udelay() call with the value.
* The count is from the kernel and tells us how many times this read was done.
* Also useful for debugging and the state
* machine uses the info to drive a poll.
* W Write a register
* V set verbosity. It's a bit mask.
* 0 -> nothing
* 1 -> print kernel messages
* 2 -> print IO ops
* 4 -> print the number of times we spin on a register in a poll
* 8 -> restore whatever the previous verbosity level was
* (only one deep stack)
*
* Again, this is not really meant for human consumption. There is not a poll
* operator as such because, sometimes, there is a read/write/read where the
* second read is a poll, and this chipset is so touchy I'm reluctant to move
* things around and/or delete too many reads.
*/
#define M 1
#define R 2
#define W 3
#define V 4
#define I 8
struct iodef {
unsigned char op;
unsigned int count;
const char *msg;
unsigned long addr;
unsigned long data;
unsigned long udelay;
};
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