diff options
Diffstat (limited to 'src/mainboard/intel/wtm2/i915io.h')
| -rw-r--r-- | src/mainboard/intel/wtm2/i915io.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/mainboard/intel/wtm2/i915io.h b/src/mainboard/intel/wtm2/i915io.h new file mode 100644 index 0000000000..2277188b6a --- /dev/null +++ b/src/mainboard/intel/wtm2/i915io.h @@ -0,0 +1,88 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 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" +#include "drm_dp_helper.h" + +/* things that are, strangely, not defined anywhere? */ +#define PCH_PP_UNLOCK 0xabcd0000 +#define WMx_LP_SR_EN (1<<31) + +/* Google Link-specific defines */ +/* how many 4096-byte pages do we need for the framebuffer? + * There are 32 bits per pixel, or 4 bytes, + * which means 1024 pixels per page. + * HencetThere are 4250 GTTs on Link: + * 2650 (X) * 1700 (Y) pixels / 1024 pixels per page. + */ +#define FRAME_BUFFER_PAGES ((2560*1700)/1024) +#define FRAME_BUFFER_BYTES (FRAME_BUFFER_PAGES*4096) + +/* One-letter commands for code not mean 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 4 +#define V 8 +#define I 16 +#define P 32 + +struct iodef { + unsigned char op; + unsigned int count; + const char *msg; + unsigned long addr; + unsigned long data; + unsigned long udelay; +}; + +/* i915.c */ +unsigned long io_i915_READ32(unsigned long addr); +void io_i915_WRITE32(unsigned long val, unsigned long addr); + +/* intel_dp.c */ +u32 pack_aux(u32 *src, int src_bytes); +void unpack_aux(u32 src, u32 *dst, int dst_bytes); +int intel_dp_aux_ch(u32 ch_ctl, u32 ch_data, u32 *send, int send_bytes, + u32 *recv, int recv_size); + |