1 /*
2 *
3 * Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450.
4 *
5 * (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
6 *
7 * Version: 1.64 2002/06/10
8 *
9 * See matroxfb_base.c for contributors.
10 *
11 */
12
13 #include "matroxfb_base.h"
14 #include "matroxfb_maven.h"
15 #include <linux/i2c.h>
16 #include <linux/i2c-algo-bit.h>
17
18 /* MGA-TVO I2C for G200, G400 */
19 #define MAT_CLK 0x20
20 #define MAT_DATA 0x10
21 /* primary head DDC for Mystique(?), G100, G200, G400 */
22 #define DDC1_CLK 0x08
23 #define DDC1_DATA 0x02
24 /* primary head DDC for Millennium, Millennium II */
25 #define DDC1B_CLK 0x10
26 #define DDC1B_DATA 0x04
27 /* secondary head DDC for G400 */
28 #define DDC2_CLK 0x04
29 #define DDC2_DATA 0x01
30
31 /******************************************************/
32
33 struct matroxfb_dh_maven_info {
34 struct i2c_bit_adapter maven;
35 struct i2c_bit_adapter ddc1;
36 struct i2c_bit_adapter ddc2;
37 };
38
39 static int matroxfb_read_gpio(struct matrox_fb_info* minfo) {
40 unsigned long flags;
41 int v;
42
43 matroxfb_DAC_lock_irqsave(flags);
44 v = matroxfb_DAC_in(PMINFO DAC_XGENIODATA);
45 matroxfb_DAC_unlock_irqrestore(flags);
46 return v;
47 }
48
49 static void matroxfb_set_gpio(struct matrox_fb_info* minfo, int mask, int val) {
50 unsigned long flags;
51 int v;
52
53 matroxfb_DAC_lock_irqsave(flags);
54 v = (matroxfb_DAC_in(PMINFO DAC_XGENIOCTRL) & mask) | val;
55 matroxfb_DAC_out(PMINFO DAC_XGENIOCTRL, v);
56 /* We must reset GENIODATA very often... XFree plays with this register */
57 matroxfb_DAC_out(PMINFO DAC_XGENIODATA, 0x00);
58 matroxfb_DAC_unlock_irqrestore(flags);
59 }
60
61 /* software I2C functions */
62 static inline void matroxfb_i2c_set(struct matrox_fb_info* minfo, int mask, int state) {
63 if (state)
64 state = 0;
65 else
66 state = mask;
67 matroxfb_set_gpio(minfo, ~mask, state);
68 }
69
70 static void matroxfb_gpio_setsda(void* data, int state) {
71 struct i2c_bit_adapter* b = data;
72 matroxfb_i2c_set(b->minfo, b->mask.data, state);
73 }
74
75 static void matroxfb_gpio_setscl(void* data, int state) {
76 struct i2c_bit_adapter* b = data;
77 matroxfb_i2c_set(b->minfo, b->mask.clock, state);
78 }
79
80 static int matroxfb_gpio_getsda(void* data) {
81 struct i2c_bit_adapter* b = data;
82 return (matroxfb_read_gpio(b->minfo) & b->mask.data) ? 1 : 0;
83 }
84
85 static int matroxfb_gpio_getscl(void* data) {
86 struct i2c_bit_adapter* b = data;
87 return (matroxfb_read_gpio(b->minfo) & b->mask.clock) ? 1 : 0;
88 }
89
90 static const struct i2c_algo_bit_data matrox_i2c_algo_template =
91 {
92 .setsda = matroxfb_gpio_setsda,
93 .setscl = matroxfb_gpio_setscl,
94 .getsda = matroxfb_gpio_getsda,
95 .getscl = matroxfb_gpio_getscl,
96 .udelay = 10,
97 .timeout = 100,
98 };
99
100 static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo,
101 unsigned int data, unsigned int clock, const char *name,
102 int class)
103 {
104 int err;
105
106 b->minfo = minfo;
107 b->mask.data = data;
108 b->mask.clock = clock;
109 b->adapter.owner = THIS_MODULE;
110 snprintf(b->adapter.name, sizeof(b->adapter.name), name,
111 minfo->fbcon.node);
112 i2c_set_adapdata(&b->adapter, b);
113 b->adapter.class = class;
114 b->adapter.algo_data = &b->bac;
115 b->adapter.dev.parent = &ACCESS_FBINFO(pcidev)->dev;
116 b->bac = matrox_i2c_algo_template;
117 b->bac.data = b;
118 err = i2c_bit_add_bus(&b->adapter);
119 b->initialized = !err;
120 return err;
121 }
122
123 static void i2c_bit_bus_del(struct i2c_bit_adapter* b) {
124 if (b->initialized) {
125 i2c_del_adapter(&b->adapter);
126 b->initialized = 0;
127 }
128 }
129
130 static inline void i2c_maven_done(struct matroxfb_dh_maven_info* minfo2) {
131 i2c_bit_bus_del(&minfo2->maven);
132 }
133
134 static inline void i2c_ddc1_done(struct matroxfb_dh_maven_info* minfo2) {
135 i2c_bit_bus_del(&minfo2->ddc1);
136 }
137
138 static inline void i2c_ddc2_done(struct matroxfb_dh_maven_info* minfo2) {
139 i2c_bit_bus_del(&minfo2->ddc2);
140 }
141
142 static void* i2c_matroxfb_probe(struct matrox_fb_info* minfo) {
143 int err;
144 unsigned long flags;
145 struct matroxfb_dh_maven_info* m2info;
146
147 m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
148 if (!m2info)
149 return NULL;
150
151 matroxfb_DAC_lock_irqsave(flags);
152 matroxfb_DAC_out(PMINFO DAC_XGENIODATA, 0xFF);
153 matroxfb_DAC_out(PMINFO DAC_XGENIOCTRL, 0x00);
154 matroxfb_DAC_unlock_irqrestore(flags);
155
156 switch (ACCESS_FBINFO(chip)) {
157 case MGA_2064:
158 case MGA_2164:
159 err = i2c_bus_reg(&m2info->ddc1, minfo,
160 DDC1B_DATA, DDC1B_CLK,
161 "DDC:fb%u #0", I2C_CLASS_DDC);
162 break;
163 default:
164 err = i2c_bus_reg(&m2info->ddc1, minfo,
165 DDC1_DATA, DDC1_CLK,
166 "DDC:fb%u #0", I2C_CLASS_DDC);
167 break;
168 }
169 if (err)
170 goto fail_ddc1;
171 if (ACCESS_FBINFO(devflags.dualhead)) {
172 err = i2c_bus_reg(&m2info->ddc2, minfo,
173 DDC2_DATA, DDC2_CLK,
174 "DDC:fb%u #1", I2C_CLASS_DDC);
175 if (err == -ENODEV) {
176 printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n");
177 } else if (err)
178 printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n");
179 /* Register maven bus even on G450/G550 */
180 err = i2c_bus_reg(&m2info->maven, minfo,
181 MAT_DATA, MAT_CLK, "MAVEN:fb%u", 0);
182 if (err)
183 printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n");
184 else {
185 struct i2c_board_info maven_info = {
186 I2C_BOARD_INFO("maven", 0x1b),
187 };
188 unsigned short const addr_list[2] = {
189 0x1b, I2C_CLIENT_END
190 };
191
192 i2c_new_probed_device(&m2info->maven.adapter,
193 &maven_info, addr_list);
194 }
195 }
196 return m2info;
197 fail_ddc1:;
198 kfree(m2info);
199 printk(KERN_ERR "i2c-matroxfb: Could not register primary adapter DDC bus.\n");
200 return NULL;
201 }
202
203 static void i2c_matroxfb_remove(struct matrox_fb_info* minfo, void* data) {
204 struct matroxfb_dh_maven_info* m2info = data;
205
206 i2c_maven_done(m2info);
207 i2c_ddc2_done(m2info);
208 i2c_ddc1_done(m2info);
209 kfree(m2info);
210 }
211
212 static struct matroxfb_driver i2c_matroxfb = {
213 .node = LIST_HEAD_INIT(i2c_matroxfb.node),
214 .name = "i2c-matroxfb",
215 .probe = i2c_matroxfb_probe,
216 .remove = i2c_matroxfb_remove,
217 };
218
219 static int __init i2c_matroxfb_init(void) {
220 if (matroxfb_register_driver(&i2c_matroxfb)) {
221 printk(KERN_ERR "i2c-matroxfb: failed to register driver\n");
222 return -ENXIO;
223 }
224 return 0;
225 }
226
227 static void __exit i2c_matroxfb_exit(void) {
228 matroxfb_unregister_driver(&i2c_matroxfb);
229 }
230
231 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
232 MODULE_DESCRIPTION("Support module providing I2C buses present on Matrox videocards");
233
234 module_init(i2c_matroxfb_init);
235 module_exit(i2c_matroxfb_exit);
236 /* no __setup required */
237 MODULE_LICENSE("GPL");
238
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