1 #include "radeonfb.h"
2
3 #include <linux/module.h>
4 #include <linux/kernel.h>
5 #include <linux/delay.h>
6 #include <linux/fb.h>
7
8
9 #include <linux/i2c.h>
10 #include <linux/i2c-id.h>
11 #include <linux/i2c-algo-bit.h>
12
13 #include <asm/io.h>
14
15 #include <video/radeon.h>
16 #include "../edid.h"
17
18 static void radeon_gpio_setscl(void* data, int state)
19 {
20 struct radeon_i2c_chan *chan = data;
21 struct radeonfb_info *rinfo = chan->rinfo;
22 u32 val;
23
24 val = INREG(chan->ddc_reg) & ~(VGA_DDC_CLK_OUT_EN);
25 if (!state)
26 val |= VGA_DDC_CLK_OUT_EN;
27
28 OUTREG(chan->ddc_reg, val);
29 (void)INREG(chan->ddc_reg);
30 }
31
32 static void radeon_gpio_setsda(void* data, int state)
33 {
34 struct radeon_i2c_chan *chan = data;
35 struct radeonfb_info *rinfo = chan->rinfo;
36 u32 val;
37
38 val = INREG(chan->ddc_reg) & ~(VGA_DDC_DATA_OUT_EN);
39 if (!state)
40 val |= VGA_DDC_DATA_OUT_EN;
41
42 OUTREG(chan->ddc_reg, val);
43 (void)INREG(chan->ddc_reg);
44 }
45
46 static int radeon_gpio_getscl(void* data)
47 {
48 struct radeon_i2c_chan *chan = data;
49 struct radeonfb_info *rinfo = chan->rinfo;
50 u32 val;
51
52 val = INREG(chan->ddc_reg);
53
54 return (val & VGA_DDC_CLK_INPUT) ? 1 : 0;
55 }
56
57 static int radeon_gpio_getsda(void* data)
58 {
59 struct radeon_i2c_chan *chan = data;
60 struct radeonfb_info *rinfo = chan->rinfo;
61 u32 val;
62
63 val = INREG(chan->ddc_reg);
64
65 return (val & VGA_DDC_DATA_INPUT) ? 1 : 0;
66 }
67
68 static int radeon_setup_i2c_bus(struct radeon_i2c_chan *chan, const char *name)
69 {
70 int rc;
71
72 snprintf(chan->adapter.name, sizeof(chan->adapter.name),
73 "radeonfb %s", name);
74 chan->adapter.owner = THIS_MODULE;
75 chan->adapter.algo_data = &chan->algo;
76 chan->adapter.dev.parent = &chan->rinfo->pdev->dev;
77 chan->algo.setsda = radeon_gpio_setsda;
78 chan->algo.setscl = radeon_gpio_setscl;
79 chan->algo.getsda = radeon_gpio_getsda;
80 chan->algo.getscl = radeon_gpio_getscl;
81 chan->algo.udelay = 10;
82 chan->algo.timeout = 20;
83 chan->algo.data = chan;
84
85 i2c_set_adapdata(&chan->adapter, chan);
86
87 /* Raise SCL and SDA */
88 radeon_gpio_setsda(chan, 1);
89 radeon_gpio_setscl(chan, 1);
90 udelay(20);
91
92 rc = i2c_bit_add_bus(&chan->adapter);
93 if (rc == 0)
94 dev_dbg(&chan->rinfo->pdev->dev, "I2C bus %s registered.\n", name);
95 else
96 dev_warn(&chan->rinfo->pdev->dev, "Failed to register I2C bus %s.\n", name);
97 return rc;
98 }
99
100 void radeon_create_i2c_busses(struct radeonfb_info *rinfo)
101 {
102 rinfo->i2c[0].rinfo = rinfo;
103 rinfo->i2c[0].ddc_reg = GPIO_MONID;
104 radeon_setup_i2c_bus(&rinfo->i2c[0], "monid");
105
106 rinfo->i2c[1].rinfo = rinfo;
107 rinfo->i2c[1].ddc_reg = GPIO_DVI_DDC;
108 radeon_setup_i2c_bus(&rinfo->i2c[1], "dvi");
109
110 rinfo->i2c[2].rinfo = rinfo;
111 rinfo->i2c[2].ddc_reg = GPIO_VGA_DDC;
112 radeon_setup_i2c_bus(&rinfo->i2c[2], "vga");
113
114 rinfo->i2c[3].rinfo = rinfo;
115 rinfo->i2c[3].ddc_reg = GPIO_CRT2_DDC;
116 radeon_setup_i2c_bus(&rinfo->i2c[3], "crt2");
117 }
118
119 void radeon_delete_i2c_busses(struct radeonfb_info *rinfo)
120 {
121 if (rinfo->i2c[0].rinfo)
122 i2c_del_adapter(&rinfo->i2c[0].adapter);
123 rinfo->i2c[0].rinfo = NULL;
124
125 if (rinfo->i2c[1].rinfo)
126 i2c_del_adapter(&rinfo->i2c[1].adapter);
127 rinfo->i2c[1].rinfo = NULL;
128
129 if (rinfo->i2c[2].rinfo)
130 i2c_del_adapter(&rinfo->i2c[2].adapter);
131 rinfo->i2c[2].rinfo = NULL;
132
133 if (rinfo->i2c[3].rinfo)
134 i2c_del_adapter(&rinfo->i2c[3].adapter);
135 rinfo->i2c[3].rinfo = NULL;
136 }
137
138 int radeon_probe_i2c_connector(struct radeonfb_info *rinfo, int conn,
139 u8 **out_edid)
140 {
141 u8 *edid;
142
143 edid = fb_ddc_read(&rinfo->i2c[conn-1].adapter);
144
145 if (out_edid)
146 *out_edid = edid;
147 if (!edid) {
148 pr_debug("radeonfb: I2C (port %d) ... not found\n", conn);
149 return MT_NONE;
150 }
151 if (edid[0x14] & 0x80) {
152 /* Fix detection using BIOS tables */
153 if (rinfo->is_mobility /*&& conn == ddc_dvi*/ &&
154 (INREG(LVDS_GEN_CNTL) & LVDS_ON)) {
155 pr_debug("radeonfb: I2C (port %d) ... found LVDS panel\n", conn);
156 return MT_LCD;
157 } else {
158 pr_debug("radeonfb: I2C (port %d) ... found TMDS panel\n", conn);
159 return MT_DFP;
160 }
161 }
162 pr_debug("radeonfb: I2C (port %d) ... found CRT display\n", conn);
163 return MT_CRT;
164 }
165
166
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