1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/fb.h>
#include <linux/i2c.h>
#include <linux/i2c-id.h>
#include <linux/i2c-algo-bit.h>
#include <asm/io.h>
#include <video/radeon.h>
#include "radeonfb.h"
#include "../edid.h"
static void radeon_gpio_setscl(void* data, int state)
{
struct radeon_i2c_chan *chan = data;
struct radeonfb_info *rinfo = chan->rinfo;
u32 val;
val = INREG(chan->ddc_reg) & ~(VGA_DDC_CLK_OUT_EN);
if (!state)
val |= VGA_DDC_CLK_OUT_EN;
OUTREG(chan->ddc_reg, val);
(void)INREG(chan->ddc_reg);
}
static void radeon_gpio_setsda(void* data, int state)
{
struct radeon_i2c_chan *chan = data;
struct radeonfb_info *rinfo = chan->rinfo;
u32 val;
val = INREG(chan->ddc_reg) & ~(VGA_DDC_DATA_OUT_EN);
if (!state)
val |= VGA_DDC_DATA_OUT_EN;
OUTREG(chan->ddc_reg, val);
(void)INREG(chan->ddc_reg);
}
static int radeon_gpio_getscl(void* data)
{
struct radeon_i2c_chan *chan = data;
struct radeonfb_info *rinfo = chan->rinfo;
u32 val;
val = INREG(chan->ddc_reg);
return (val & VGA_DDC_CLK_INPUT) ? 1 : 0;
}
static int radeon_gpio_getsda(void* data)
{
struct radeon_i2c_chan *chan = data;
struct radeonfb_info *rinfo = chan->rinfo;
u32 val;
val = INREG(chan->ddc_reg);
return (val & VGA_DDC_DATA_INPUT) ? 1 : 0;
}
static int radeon_setup_i2c_bus(struct radeon_i2c_chan *chan, const char *name)
{
int rc;
strcpy(chan->adapter.name, name);
chan->adapter.owner = THIS_MODULE;
chan->adapter.id = I2C_HW_B_RADEON;
chan->adapter.algo_data = &chan->algo;
chan->adapter.dev.parent = &chan->rinfo->pdev->dev;
chan->algo.setsda = radeon_gpio_setsda;
chan->algo.setscl = radeon_gpio_setscl;
chan->algo.getsda = radeon_gpio_getsda;
chan->algo.getscl = radeon_gpio_getscl;
chan->algo.udelay = 40;
chan->algo.timeout = 20;
chan->algo.data = chan;
i2c_set_adapdata(&chan->adapter, chan);
/* Raise SCL and SDA */
radeon_gpio_setsda(chan, 1);
radeon_gpio_setscl(chan, 1);
udelay(20);
rc = i2c_bit_add_bus(&chan->adapter);
if (rc == 0)
dev_dbg(&chan->rinfo->pdev->dev, "I2C bus %s registered.\n", name);
else
dev_warn(&chan->rinfo->pdev->dev, "Failed to register I2C bus %s.\n", name);
return rc;
}
void radeon_create_i2c_busses(struct radeonfb_info *rinfo)
{
rinfo->i2c[0].rinfo = rinfo;
rinfo->i2c[0].ddc_reg = GPIO_MONID;
radeon_setup_i2c_bus(&rinfo->i2c[0], "monid");
rinfo->i2c[1].rinfo = rinfo;
rinfo->i2c[1].ddc_reg = GPIO_DVI_DDC;
radeon_setup_i2c_bus(&rinfo->i2c[1], "dvi");
rinfo->i2c[2].rinfo = rinfo;
rinfo->i2c[2].ddc_reg = GPIO_VGA_DDC;
radeon_setup_i2c_bus(&rinfo->i2c[2], "vga");
rinfo->i2c[3].rinfo = rinfo;
rinfo->i2c[3].ddc_reg = GPIO_CRT2_DDC;
radeon_setup_i2c_bus(&rinfo->i2c[3], "crt2");
}
void radeon_delete_i2c_busses(struct radeonfb_info *rinfo)
{
if (rinfo->i2c[0].rinfo)
i2c_bit_del_bus(&rinfo->i2c[0].adapter);
rinfo->i2c[0].rinfo = NULL;
if (rinfo->i2c[1].rinfo)
i2c_bit_del_bus(&rinfo->i2c[1].adapter);
rinfo->i2c[1].rinfo = NULL;
if (rinfo->i2c[2].rinfo)
i2c_bit_del_bus(&rinfo->i2c[2].adapter);
rinfo->i2c[2].rinfo = NULL;
if (rinfo->i2c[3].rinfo)
i2c_bit_del_bus(&rinfo->i2c[3].adapter);
rinfo->i2c[3].rinfo = NULL;
}
int radeon_probe_i2c_connector(struct radeonfb_info *rinfo, int conn,
u8 **out_edid)
{
u32 reg = rinfo->i2c[conn-1].ddc_reg;
u8 *edid;
OUTREG(reg, INREG(reg) &
~(VGA_DDC_DATA_OUTPUT | VGA_DDC_CLK_OUTPUT));
edid = fb_ddc_read(&rinfo->i2c[conn-1].adapter);
if (out_edid)
*out_edid = edid;
if (!edid) {
RTRACE("radeonfb: I2C (port %d) ... not found\n", conn);
return MT_NONE;
}
if (edid[0x14] & 0x80) {
/* Fix detection using BIOS tables */
if (rinfo->is_mobility /*&& conn == ddc_dvi*/ &&
(INREG(LVDS_GEN_CNTL) & LVDS_ON)) {
RTRACE("radeonfb: I2C (port %d) ... found LVDS panel\n", conn);
return MT_LCD;
} else {
RTRACE("radeonfb: I2C (port %d) ... found TMDS panel\n", conn);
return MT_DFP;
}
}
RTRACE("radeonfb: I2C (port %d) ... found CRT display\n", conn);
return MT_CRT;
}
|
