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 33struct matroxfb_dh_maven_info { 34 struct i2c_bit_adapter maven; 35 struct i2c_bit_adapter ddc1; 36 struct i2c_bit_adapter ddc2; 37}; 38 39static 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 49static 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 */ 62static 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 70static 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 75static 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 80static 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 85static 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 90static struct i2c_adapter matrox_i2c_adapter_template = 91{ 92 .owner = THIS_MODULE, 93 .id = I2C_HW_B_G400, 94}; 95 96static struct i2c_algo_bit_data matrox_i2c_algo_template = 97{ 98 .setsda = matroxfb_gpio_setsda, 99 .setscl = matroxfb_gpio_setscl, 100 .getsda = matroxfb_gpio_getsda, 101 .getscl = matroxfb_gpio_getscl, 102 .udelay = 10, 103 .timeout = 100, 104}; 105 106static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo, 107 unsigned int data, unsigned int clock, const char* name) { 108 int err; 109 110 b->minfo = minfo; 111 b->mask.data = data; 112 b->mask.clock = clock; 113 b->adapter = matrox_i2c_adapter_template; 114 snprintf(b->adapter.name, sizeof(b->adapter.name), name, 115 minfo->fbcon.node); 116 i2c_set_adapdata(&b->adapter, b); 117 b->adapter.algo_data = &b->bac; 118 b->adapter.dev.parent = &ACCESS_FBINFO(pcidev)->dev; 119 b->bac = matrox_i2c_algo_template; 120 b->bac.data = b; 121 err = i2c_bit_add_bus(&b->adapter); 122 b->initialized = !err; 123 return err; 124} 125 126static void i2c_bit_bus_del(struct i2c_bit_adapter* b) { 127 if (b->initialized) { 128 i2c_del_adapter(&b->adapter); 129 b->initialized = 0; 130 } 131} 132 133static inline void i2c_maven_done(struct matroxfb_dh_maven_info* minfo2) { 134 i2c_bit_bus_del(&minfo2->maven); 135} 136 137static inline void i2c_ddc1_done(struct matroxfb_dh_maven_info* minfo2) { 138 i2c_bit_bus_del(&minfo2->ddc1); 139} 140 141static inline void i2c_ddc2_done(struct matroxfb_dh_maven_info* minfo2) { 142 i2c_bit_bus_del(&minfo2->ddc2); 143} 144 145static void* i2c_matroxfb_probe(struct matrox_fb_info* minfo) { 146 int err; 147 unsigned long flags; 148 struct matroxfb_dh_maven_info* m2info; 149 150 m2info = kzalloc(sizeof(*m2info), GFP_KERNEL); 151 if (!m2info) 152 return NULL; 153 154 matroxfb_DAC_lock_irqsave(flags); 155 matroxfb_DAC_out(PMINFO DAC_XGENIODATA, 0xFF); 156 matroxfb_DAC_out(PMINFO DAC_XGENIOCTRL, 0x00); 157 matroxfb_DAC_unlock_irqrestore(flags); 158 159 switch (ACCESS_FBINFO(chip)) { 160 case MGA_2064: 161 case MGA_2164: 162 err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1B_DATA, DDC1B_CLK, "DDC:fb%u #0"); 163 break; 164 default: 165 err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1_DATA, DDC1_CLK, "DDC:fb%u #0"); 166 break; 167 } 168 if (err) 169 goto fail_ddc1; 170 if (ACCESS_FBINFO(devflags.dualhead)) { 171 err = i2c_bus_reg(&m2info->ddc2, minfo, DDC2_DATA, DDC2_CLK, "DDC:fb%u #1"); 172 if (err == -ENODEV) { 173 printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n"); 174 } else if (err) 175 printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n"); 176 /* Register maven bus even on G450/G550 */ 177 err = i2c_bus_reg(&m2info->maven, minfo, MAT_DATA, MAT_CLK, "MAVEN:fb%u"); 178 if (err) 179 printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n"); 180 } 181 return m2info; 182fail_ddc1:; 183 kfree(m2info); 184 printk(KERN_ERR "i2c-matroxfb: Could not register primary adapter DDC bus.\n"); 185 return NULL; 186} 187 188static void i2c_matroxfb_remove(struct matrox_fb_info* minfo, void* data) { 189 struct matroxfb_dh_maven_info* m2info = data; 190 191 i2c_maven_done(m2info); 192 i2c_ddc2_done(m2info); 193 i2c_ddc1_done(m2info); 194 kfree(m2info); 195} 196 197static struct matroxfb_driver i2c_matroxfb = { 198 .node = LIST_HEAD_INIT(i2c_matroxfb.node), 199 .name = "i2c-matroxfb", 200 .probe = i2c_matroxfb_probe, 201 .remove = i2c_matroxfb_remove, 202}; 203 204static int __init i2c_matroxfb_init(void) { 205 if (matroxfb_register_driver(&i2c_matroxfb)) { 206 printk(KERN_ERR "i2c-matroxfb: failed to register driver\n"); 207 return -ENXIO; 208 } 209 return 0; 210} 211 212static void __exit i2c_matroxfb_exit(void) { 213 matroxfb_unregister_driver(&i2c_matroxfb); 214} 215 216MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>"); 217MODULE_DESCRIPTION("Support module providing I2C buses present on Matrox videocards"); 218 219module_init(i2c_matroxfb_init); 220module_exit(i2c_matroxfb_exit); 221/* no __setup required */ 222MODULE_LICENSE("GPL"); 223