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14#include "matroxfb_base.h"
15#include "matroxfb_maven.h"
16#include <linux/i2c.h>
17#include <linux/slab.h>
18#include <linux/i2c-algo-bit.h>
19
20
21#define MAT_CLK 0x20
22#define MAT_DATA 0x10
23
24#define DDC1_CLK 0x08
25#define DDC1_DATA 0x02
26
27#define DDC1B_CLK 0x10
28#define DDC1B_DATA 0x04
29
30#define DDC2_CLK 0x04
31#define DDC2_DATA 0x01
32
33
34
35struct matroxfb_dh_maven_info {
36 struct i2c_bit_adapter maven;
37 struct i2c_bit_adapter ddc1;
38 struct i2c_bit_adapter ddc2;
39};
40
41static int matroxfb_read_gpio(struct matrox_fb_info* minfo) {
42 unsigned long flags;
43 int v;
44
45 matroxfb_DAC_lock_irqsave(flags);
46 v = matroxfb_DAC_in(minfo, DAC_XGENIODATA);
47 matroxfb_DAC_unlock_irqrestore(flags);
48 return v;
49}
50
51static void matroxfb_set_gpio(struct matrox_fb_info* minfo, int mask, int val) {
52 unsigned long flags;
53 int v;
54
55 matroxfb_DAC_lock_irqsave(flags);
56 v = (matroxfb_DAC_in(minfo, DAC_XGENIOCTRL) & mask) | val;
57 matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, v);
58
59 matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0x00);
60 matroxfb_DAC_unlock_irqrestore(flags);
61}
62
63
64static inline void matroxfb_i2c_set(struct matrox_fb_info* minfo, int mask, int state) {
65 if (state)
66 state = 0;
67 else
68 state = mask;
69 matroxfb_set_gpio(minfo, ~mask, state);
70}
71
72static void matroxfb_gpio_setsda(void* data, int state) {
73 struct i2c_bit_adapter* b = data;
74 matroxfb_i2c_set(b->minfo, b->mask.data, state);
75}
76
77static void matroxfb_gpio_setscl(void* data, int state) {
78 struct i2c_bit_adapter* b = data;
79 matroxfb_i2c_set(b->minfo, b->mask.clock, state);
80}
81
82static int matroxfb_gpio_getsda(void* data) {
83 struct i2c_bit_adapter* b = data;
84 return (matroxfb_read_gpio(b->minfo) & b->mask.data) ? 1 : 0;
85}
86
87static int matroxfb_gpio_getscl(void* data) {
88 struct i2c_bit_adapter* b = data;
89 return (matroxfb_read_gpio(b->minfo) & b->mask.clock) ? 1 : 0;
90}
91
92static const struct i2c_algo_bit_data matrox_i2c_algo_template =
93{
94 .setsda = matroxfb_gpio_setsda,
95 .setscl = matroxfb_gpio_setscl,
96 .getsda = matroxfb_gpio_getsda,
97 .getscl = matroxfb_gpio_getscl,
98 .udelay = 10,
99 .timeout = 100,
100};
101
102static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo,
103 unsigned int data, unsigned int clock, const char *name,
104 int class)
105{
106 int err;
107
108 b->minfo = minfo;
109 b->mask.data = data;
110 b->mask.clock = clock;
111 b->adapter.owner = THIS_MODULE;
112 snprintf(b->adapter.name, sizeof(b->adapter.name), name,
113 minfo->fbcon.node);
114 i2c_set_adapdata(&b->adapter, b);
115 b->adapter.class = class;
116 b->adapter.algo_data = &b->bac;
117 b->adapter.dev.parent = &minfo->pcidev->dev;
118 b->bac = matrox_i2c_algo_template;
119 b->bac.data = b;
120 err = i2c_bit_add_bus(&b->adapter);
121 b->initialized = !err;
122 return err;
123}
124
125static void i2c_bit_bus_del(struct i2c_bit_adapter* b) {
126 if (b->initialized) {
127 i2c_del_adapter(&b->adapter);
128 b->initialized = 0;
129 }
130}
131
132static inline void i2c_maven_done(struct matroxfb_dh_maven_info* minfo2) {
133 i2c_bit_bus_del(&minfo2->maven);
134}
135
136static inline void i2c_ddc1_done(struct matroxfb_dh_maven_info* minfo2) {
137 i2c_bit_bus_del(&minfo2->ddc1);
138}
139
140static inline void i2c_ddc2_done(struct matroxfb_dh_maven_info* minfo2) {
141 i2c_bit_bus_del(&minfo2->ddc2);
142}
143
144static void* i2c_matroxfb_probe(struct matrox_fb_info* minfo) {
145 int err;
146 unsigned long flags;
147 struct matroxfb_dh_maven_info* m2info;
148
149 m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
150 if (!m2info)
151 return NULL;
152
153 matroxfb_DAC_lock_irqsave(flags);
154 matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0xFF);
155 matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, 0x00);
156 matroxfb_DAC_unlock_irqrestore(flags);
157
158 switch (minfo->chip) {
159 case MGA_2064:
160 case MGA_2164:
161 err = i2c_bus_reg(&m2info->ddc1, minfo,
162 DDC1B_DATA, DDC1B_CLK,
163 "DDC:fb%u #0", I2C_CLASS_DDC);
164 break;
165 default:
166 err = i2c_bus_reg(&m2info->ddc1, minfo,
167 DDC1_DATA, DDC1_CLK,
168 "DDC:fb%u #0", I2C_CLASS_DDC);
169 break;
170 }
171 if (err)
172 goto fail_ddc1;
173 if (minfo->devflags.dualhead) {
174 err = i2c_bus_reg(&m2info->ddc2, minfo,
175 DDC2_DATA, DDC2_CLK,
176 "DDC:fb%u #1", I2C_CLASS_DDC);
177 if (err == -ENODEV) {
178 printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n");
179 } else if (err)
180 printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n");
181
182 err = i2c_bus_reg(&m2info->maven, minfo,
183 MAT_DATA, MAT_CLK, "MAVEN:fb%u", 0);
184 if (err)
185 printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n");
186 else {
187 struct i2c_board_info maven_info = {
188 I2C_BOARD_INFO("maven", 0x1b),
189 };
190 unsigned short const addr_list[2] = {
191 0x1b, I2C_CLIENT_END
192 };
193
194 i2c_new_scanned_device(&m2info->maven.adapter,
195 &maven_info, addr_list, NULL);
196 }
197 }
198 return m2info;
199fail_ddc1:;
200 kfree(m2info);
201 printk(KERN_ERR "i2c-matroxfb: Could not register primary adapter DDC bus.\n");
202 return NULL;
203}
204
205static void i2c_matroxfb_remove(struct matrox_fb_info* minfo, void* data) {
206 struct matroxfb_dh_maven_info* m2info = data;
207
208 i2c_maven_done(m2info);
209 i2c_ddc2_done(m2info);
210 i2c_ddc1_done(m2info);
211 kfree(m2info);
212}
213
214static struct matroxfb_driver i2c_matroxfb = {
215 .node = LIST_HEAD_INIT(i2c_matroxfb.node),
216 .name = "i2c-matroxfb",
217 .probe = i2c_matroxfb_probe,
218 .remove = i2c_matroxfb_remove,
219};
220
221static int __init i2c_matroxfb_init(void) {
222 if (matroxfb_register_driver(&i2c_matroxfb)) {
223 printk(KERN_ERR "i2c-matroxfb: failed to register driver\n");
224 return -ENXIO;
225 }
226 return 0;
227}
228
229static void __exit i2c_matroxfb_exit(void) {
230 matroxfb_unregister_driver(&i2c_matroxfb);
231}
232
233MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
234MODULE_DESCRIPTION("Support module providing I2C buses present on Matrox videocards");
235
236module_init(i2c_matroxfb_init);
237module_exit(i2c_matroxfb_exit);
238
239MODULE_LICENSE("GPL");
240
