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
matroxfb_read_gpio(struct matrox_fb_info * minfo)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
matroxfb_set_gpio(struct matrox_fb_info * minfo,int mask,int val)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 */
matroxfb_i2c_set(struct matrox_fb_info * minfo,int mask,int state)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
matroxfb_gpio_setsda(void * data,int state)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
matroxfb_gpio_setscl(void * data,int state)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
matroxfb_gpio_getsda(void * data)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
matroxfb_gpio_getscl(void * data)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
matroxfb_dh_inc_use(struct i2c_adapter * dummy)90 static void matroxfb_dh_inc_use(struct i2c_adapter* dummy) {
91 MOD_INC_USE_COUNT;
92 }
93
matroxfb_dh_dec_use(struct i2c_adapter * dummy)94 static void matroxfb_dh_dec_use(struct i2c_adapter* dummy) {
95 MOD_DEC_USE_COUNT;
96 }
97
98 static struct i2c_adapter matrox_i2c_adapter_template =
99 {
100 .id = I2C_HW_B_G400,
101 .inc_use = matroxfb_dh_inc_use,
102 .dec_use = matroxfb_dh_dec_use,
103 };
104
105 static struct i2c_algo_bit_data matrox_i2c_algo_template =
106 {
107 .setsda = matroxfb_gpio_setsda,
108 .setscl = matroxfb_gpio_setscl,
109 .getsda = matroxfb_gpio_getsda,
110 .getscl = matroxfb_gpio_getscl,
111 .udelay = 10,
112 .mdelay = 10,
113 .timeout = 100,
114 };
115
i2c_bus_reg(struct i2c_bit_adapter * b,struct matrox_fb_info * minfo,unsigned int data,unsigned int clock,const char * name)116 static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo,
117 unsigned int data, unsigned int clock, const char* name) {
118 int err;
119
120 b->minfo = minfo;
121 b->mask.data = data;
122 b->mask.clock = clock;
123 b->adapter = matrox_i2c_adapter_template;
124 sprintf(b->adapter.name, name, GET_FB_IDX(minfo->fbcon.node));
125 b->adapter.data = b;
126 b->adapter.algo_data = &b->bac;
127 b->bac = matrox_i2c_algo_template;
128 b->bac.data = b;
129 err = i2c_bit_add_bus(&b->adapter);
130 b->initialized = !err;
131 return err;
132 }
133
i2c_bit_bus_del(struct i2c_bit_adapter * b)134 static void i2c_bit_bus_del(struct i2c_bit_adapter* b) {
135 if (b->initialized) {
136 i2c_bit_del_bus(&b->adapter);
137 b->initialized = 0;
138 }
139 }
140
i2c_maven_done(struct matroxfb_dh_maven_info * minfo2)141 static inline void i2c_maven_done(struct matroxfb_dh_maven_info* minfo2) {
142 i2c_bit_bus_del(&minfo2->maven);
143 }
144
i2c_ddc1_done(struct matroxfb_dh_maven_info * minfo2)145 static inline void i2c_ddc1_done(struct matroxfb_dh_maven_info* minfo2) {
146 i2c_bit_bus_del(&minfo2->ddc1);
147 }
148
i2c_ddc2_done(struct matroxfb_dh_maven_info * minfo2)149 static inline void i2c_ddc2_done(struct matroxfb_dh_maven_info* minfo2) {
150 i2c_bit_bus_del(&minfo2->ddc2);
151 }
152
i2c_matroxfb_probe(struct matrox_fb_info * minfo)153 static void* i2c_matroxfb_probe(struct matrox_fb_info* minfo) {
154 int err;
155 unsigned long flags;
156 struct matroxfb_dh_maven_info* m2info;
157
158 m2info = (struct matroxfb_dh_maven_info*)kmalloc(sizeof(*m2info), GFP_KERNEL);
159 if (!m2info)
160 return NULL;
161
162 matroxfb_DAC_lock_irqsave(flags);
163 matroxfb_DAC_out(PMINFO DAC_XGENIODATA, 0xFF);
164 matroxfb_DAC_out(PMINFO DAC_XGENIOCTRL, 0x00);
165 matroxfb_DAC_unlock_irqrestore(flags);
166
167 memset(m2info, 0, sizeof(*m2info));
168
169 switch (ACCESS_FBINFO(chip)) {
170 case MGA_2064:
171 case MGA_2164:
172 err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1B_DATA, DDC1B_CLK, "DDC:fb%u #0 on i2c-matroxfb");
173 break;
174 default:
175 err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1_DATA, DDC1_CLK, "DDC:fb%u #0 on i2c-matroxfb");
176 break;
177 }
178 if (err)
179 goto fail_ddc1;
180 if (ACCESS_FBINFO(devflags.dualhead)) {
181 err = i2c_bus_reg(&m2info->ddc2, minfo, DDC2_DATA, DDC2_CLK, "DDC:fb%u #1 on i2c-matroxfb");
182 if (err == -ENODEV) {
183 printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n");
184 } else if (err)
185 printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n");
186 /* Register maven bus even on G450/G550 */
187 err = i2c_bus_reg(&m2info->maven, minfo, MAT_DATA, MAT_CLK, "MAVEN:fb%u on i2c-matroxfb");
188 if (err)
189 printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n");
190 }
191 return m2info;
192 fail_ddc1:;
193 kfree(m2info);
194 printk(KERN_ERR "i2c-matroxfb: Could not register primary adapter DDC bus.\n");
195 return NULL;
196 }
197
i2c_matroxfb_remove(struct matrox_fb_info * minfo,void * data)198 static void i2c_matroxfb_remove(struct matrox_fb_info* minfo, void* data) {
199 struct matroxfb_dh_maven_info* m2info = data;
200
201 i2c_maven_done(m2info);
202 i2c_ddc2_done(m2info);
203 i2c_ddc1_done(m2info);
204 kfree(m2info);
205 }
206
207 static struct matroxfb_driver i2c_matroxfb = {
208 .node = LIST_HEAD_INIT(i2c_matroxfb.node),
209 .name = "i2c-matroxfb",
210 .probe = i2c_matroxfb_probe,
211 .remove = i2c_matroxfb_remove,
212 };
213
i2c_matroxfb_init(void)214 static int __init i2c_matroxfb_init(void) {
215 if (matroxfb_register_driver(&i2c_matroxfb)) {
216 printk(KERN_ERR "i2c-matroxfb: failed to register driver\n");
217 return -ENXIO;
218 }
219 return 0;
220 }
221
i2c_matroxfb_exit(void)222 static void __exit i2c_matroxfb_exit(void) {
223 matroxfb_unregister_driver(&i2c_matroxfb);
224 }
225
226 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
227 MODULE_DESCRIPTION("Support module providing I2C buses present on Matrox videocards");
228
229 module_init(i2c_matroxfb_init);
230 module_exit(i2c_matroxfb_exit);
231 /* no __setup required */
232 MODULE_LICENSE("GPL");
233