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/*
* Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Ke Yu
* Zhiyuan Lv <zhiyuan.lv@intel.com>
*
* Contributors:
* Terrence Xu <terrence.xu@intel.com>
* Changbin Du <changbin.du@intel.com>
* Bing Niu <bing.niu@intel.com>
* Zhi Wang <zhi.a.wang@intel.com>
*
*/
#ifndef _GVT_EDID_H_
#define _GVT_EDID_H_
#include <linux/types.h>
struct intel_vgpu;
#define EDID_SIZE 128
#define EDID_ADDR 0x50 /* Linux hvm EDID addr */
#define GVT_AUX_NATIVE_WRITE 0x8
#define GVT_AUX_NATIVE_READ 0x9
#define GVT_AUX_I2C_WRITE 0x0
#define GVT_AUX_I2C_READ 0x1
#define GVT_AUX_I2C_STATUS 0x2
#define GVT_AUX_I2C_MOT 0x4
#define GVT_AUX_I2C_REPLY_ACK 0x0
struct intel_vgpu_edid_data {
bool data_valid;
unsigned char edid_block[EDID_SIZE];
};
enum gmbus_cycle_type {
GMBUS_NOCYCLE = 0x0,
NIDX_NS_W = 0x1,
IDX_NS_W = 0x3,
GMBUS_STOP = 0x4,
NIDX_STOP = 0x5,
IDX_STOP = 0x7
};
/*
* States of GMBUS
*
* GMBUS0-3 could be related to the EDID virtualization. Another two GMBUS
* registers, GMBUS4 (interrupt mask) and GMBUS5 (2 byte indes register), are
* not considered here. Below describes the usage of GMBUS registers that are
* cared by the EDID virtualization
*
* GMBUS0:
* R/W
* port selection. value of bit0 - bit2 corresponds to the GPIO registers.
*
* GMBUS1:
* R/W Protect
* Command and Status.
* bit0 is the direction bit: 1 is read; 0 is write.
* bit1 - bit7 is slave 7-bit address.
* bit16 - bit24 total byte count (ignore?)
*
* GMBUS2:
* Most of bits are read only except bit 15 (IN_USE)
* Status register
* bit0 - bit8 current byte count
* bit 11: hardware ready;
*
* GMBUS3:
* Read/Write
* Data for transfer
*/
/* From hw specs, Other phases like START, ADDRESS, INDEX
* are invisible to GMBUS MMIO interface. So no definitions
* in below enum types
*/
enum gvt_gmbus_phase {
GMBUS_IDLE_PHASE = 0,
GMBUS_DATA_PHASE,
GMBUS_WAIT_PHASE,
//GMBUS_STOP_PHASE,
GMBUS_MAX_PHASE
};
struct intel_vgpu_i2c_gmbus {
unsigned int total_byte_count; /* from GMBUS1 */
enum gmbus_cycle_type cycle_type;
enum gvt_gmbus_phase phase;
};
struct intel_vgpu_i2c_aux_ch {
bool i2c_over_aux_ch;
bool aux_ch_mot;
};
enum i2c_state {
I2C_NOT_SPECIFIED = 0,
I2C_GMBUS = 1,
I2C_AUX_CH = 2
};
/* I2C sequences cannot interleave.
* GMBUS and AUX_CH sequences cannot interleave.
*/
struct intel_vgpu_i2c_edid {
enum i2c_state state;
unsigned int port;
bool slave_selected;
bool edid_available;
unsigned int current_edid_read;
struct intel_vgpu_i2c_gmbus gmbus;
struct intel_vgpu_i2c_aux_ch aux_ch;
};
void intel_vgpu_init_i2c_edid(struct intel_vgpu *vgpu);
int intel_gvt_i2c_handle_gmbus_read(struct intel_vgpu *vgpu,
unsigned int offset, void *p_data, unsigned int bytes);
int intel_gvt_i2c_handle_gmbus_write(struct intel_vgpu *vgpu,
unsigned int offset, void *p_data, unsigned int bytes);
void intel_gvt_i2c_handle_aux_ch_write(struct intel_vgpu *vgpu,
int port_idx,
unsigned int offset,
void *p_data);
#endif /*_GVT_EDID_H_*/
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