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/slab.h> 17 #include <linux/i2c-algo-bit.h> 18 19 /* MGA-TVO I2C for G200, G400 */ 20 #define MAT_CLK 0x20 21 #define MAT_DATA 0x10 22 /* primary head DDC for Mystique(?), G100, G200, G400 */ 23 #define DDC1_CLK 0x08 24 #define DDC1_DATA 0x02 25 /* primary head DDC for Millennium, Millennium II */ 26 #define DDC1B_CLK 0x10 27 #define DDC1B_DATA 0x04 28 /* secondary head DDC for G400 */ 29 #define DDC2_CLK 0x04 30 #define DDC2_DATA 0x01 31 32 /******************************************************/ 33 34 struct matroxfb_dh_maven_info { 35 struct i2c_bit_adapter maven; 36 struct i2c_bit_adapter ddc1; 37 struct i2c_bit_adapter ddc2; 38 }; 39 40 static int matroxfb_read_gpio(struct matrox_fb_info* minfo) { 41 unsigned long flags; 42 int v; 43 44 matroxfb_DAC_lock_irqsave(flags); 45 v = matroxfb_DAC_in(minfo, DAC_XGENIODATA); 46 matroxfb_DAC_unlock_irqrestore(flags); 47 return v; 48 } 49 50 static void matroxfb_set_gpio(struct matrox_fb_info* minfo, int mask, int val) { 51 unsigned long flags; 52 int v; 53 54 matroxfb_DAC_lock_irqsave(flags); 55 v = (matroxfb_DAC_in(minfo, DAC_XGENIOCTRL) & mask) | val; 56 matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, v); 57 /* We must reset GENIODATA very often... XFree plays with this register */ 58 matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0x00); 59 matroxfb_DAC_unlock_irqrestore(flags); 60 } 61 62 /* software I2C functions */ 63 static inline void matroxfb_i2c_set(struct matrox_fb_info* minfo, int mask, int state) { 64 if (state) 65 state = 0; 66 else 67 state = mask; 68 matroxfb_set_gpio(minfo, ~mask, state); 69 } 70 71 static void matroxfb_gpio_setsda(void* data, int state) { 72 struct i2c_bit_adapter* b = data; 73 matroxfb_i2c_set(b->minfo, b->mask.data, state); 74 } 75 76 static void matroxfb_gpio_setscl(void* data, int state) { 77 struct i2c_bit_adapter* b = data; 78 matroxfb_i2c_set(b->minfo, b->mask.clock, state); 79 } 80 81 static int matroxfb_gpio_getsda(void* data) { 82 struct i2c_bit_adapter* b = data; 83 return (matroxfb_read_gpio(b->minfo) & b->mask.data) ? 1 : 0; 84 } 85 86 static int matroxfb_gpio_getscl(void* data) { 87 struct i2c_bit_adapter* b = data; 88 return (matroxfb_read_gpio(b->minfo) & b->mask.clock) ? 1 : 0; 89 } 90 91 static const struct i2c_algo_bit_data matrox_i2c_algo_template = 92 { 93 .setsda = matroxfb_gpio_setsda, 94 .setscl = matroxfb_gpio_setscl, 95 .getsda = matroxfb_gpio_getsda, 96 .getscl = matroxfb_gpio_getscl, 97 .udelay = 10, 98 .timeout = 100, 99 }; 100 101 static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo, 102 unsigned int data, unsigned int clock, const char *name, 103 int class) 104 { 105 int err; 106 107 b->minfo = minfo; 108 b->mask.data = data; 109 b->mask.clock = clock; 110 b->adapter.owner = THIS_MODULE; 111 snprintf(b->adapter.name, sizeof(b->adapter.name), name, 112 minfo->fbcon.node); 113 i2c_set_adapdata(&b->adapter, b); 114 b->adapter.class = class; 115 b->adapter.algo_data = &b->bac; 116 b->adapter.dev.parent = &minfo->pcidev->dev; 117 b->bac = matrox_i2c_algo_template; 118 b->bac.data = b; 119 err = i2c_bit_add_bus(&b->adapter); 120 b->initialized = !err; 121 return err; 122 } 123 124 static void i2c_bit_bus_del(struct i2c_bit_adapter* b) { 125 if (b->initialized) { 126 i2c_del_adapter(&b->adapter); 127 b->initialized = 0; 128 } 129 } 130 131 static inline void i2c_maven_done(struct matroxfb_dh_maven_info* minfo2) { 132 i2c_bit_bus_del(&minfo2->maven); 133 } 134 135 static inline void i2c_ddc1_done(struct matroxfb_dh_maven_info* minfo2) { 136 i2c_bit_bus_del(&minfo2->ddc1); 137 } 138 139 static inline void i2c_ddc2_done(struct matroxfb_dh_maven_info* minfo2) { 140 i2c_bit_bus_del(&minfo2->ddc2); 141 } 142 143 static void* i2c_matroxfb_probe(struct matrox_fb_info* minfo) { 144 int err; 145 unsigned long flags; 146 struct matroxfb_dh_maven_info* m2info; 147 148 m2info = kzalloc(sizeof(*m2info), GFP_KERNEL); 149 if (!m2info) 150 return NULL; 151 152 matroxfb_DAC_lock_irqsave(flags); 153 matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0xFF); 154 matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, 0x00); 155 matroxfb_DAC_unlock_irqrestore(flags); 156 157 switch (minfo->chip) { 158 case MGA_2064: 159 case MGA_2164: 160 err = i2c_bus_reg(&m2info->ddc1, minfo, 161 DDC1B_DATA, DDC1B_CLK, 162 "DDC:fb%u #0", I2C_CLASS_DDC); 163 break; 164 default: 165 err = i2c_bus_reg(&m2info->ddc1, minfo, 166 DDC1_DATA, DDC1_CLK, 167 "DDC:fb%u #0", I2C_CLASS_DDC); 168 break; 169 } 170 if (err) 171 goto fail_ddc1; 172 if (minfo->devflags.dualhead) { 173 err = i2c_bus_reg(&m2info->ddc2, minfo, 174 DDC2_DATA, DDC2_CLK, 175 "DDC:fb%u #1", I2C_CLASS_DDC); 176 if (err == -ENODEV) { 177 printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n"); 178 } else if (err) 179 printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n"); 180 /* Register maven bus even on G450/G550 */ 181 err = i2c_bus_reg(&m2info->maven, minfo, 182 MAT_DATA, MAT_CLK, "MAVEN:fb%u", 0); 183 if (err) 184 printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n"); 185 else { 186 struct i2c_board_info maven_info = { 187 I2C_BOARD_INFO("maven", 0x1b), 188 }; 189 unsigned short const addr_list[2] = { 190 0x1b, I2C_CLIENT_END 191 }; 192 193 i2c_new_probed_device(&m2info->maven.adapter, 194 &maven_info, addr_list, NULL); 195 } 196 } 197 return m2info; 198 fail_ddc1:; 199 kfree(m2info); 200 printk(KERN_ERR "i2c-matroxfb: Could not register primary adapter DDC bus.\n"); 201 return NULL; 202 } 203 204 static void i2c_matroxfb_remove(struct matrox_fb_info* minfo, void* data) { 205 struct matroxfb_dh_maven_info* m2info = data; 206 207 i2c_maven_done(m2info); 208 i2c_ddc2_done(m2info); 209 i2c_ddc1_done(m2info); 210 kfree(m2info); 211 } 212 213 static struct matroxfb_driver i2c_matroxfb = { 214 .node = LIST_HEAD_INIT(i2c_matroxfb.node), 215 .name = "i2c-matroxfb", 216 .probe = i2c_matroxfb_probe, 217 .remove = i2c_matroxfb_remove, 218 }; 219 220 static int __init i2c_matroxfb_init(void) { 221 if (matroxfb_register_driver(&i2c_matroxfb)) { 222 printk(KERN_ERR "i2c-matroxfb: failed to register driver\n"); 223 return -ENXIO; 224 } 225 return 0; 226 } 227 228 static void __exit i2c_matroxfb_exit(void) { 229 matroxfb_unregister_driver(&i2c_matroxfb); 230 } 231 232 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>"); 233 MODULE_DESCRIPTION("Support module providing I2C buses present on Matrox videocards"); 234 235 module_init(i2c_matroxfb_init); 236 module_exit(i2c_matroxfb_exit); 237 /* no __setup required */ 238 MODULE_LICENSE("GPL"); 239