/* * * Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450. * * (c) 1998-2002 Petr Vandrovec * * Version: 1.64 2002/06/10 * * See matroxfb_base.c for contributors. * */ #include "matroxfb_base.h" #include "matroxfb_maven.h" #include #include #include /* MGA-TVO I2C for G200, G400 */ #define MAT_CLK 0x20 #define MAT_DATA 0x10 /* primary head DDC for Mystique(?), G100, G200, G400 */ #define DDC1_CLK 0x08 #define DDC1_DATA 0x02 /* primary head DDC for Millennium, Millennium II */ #define DDC1B_CLK 0x10 #define DDC1B_DATA 0x04 /* secondary head DDC for G400 */ #define DDC2_CLK 0x04 #define DDC2_DATA 0x01 /******************************************************/ struct matroxfb_dh_maven_info { struct i2c_bit_adapter maven; struct i2c_bit_adapter ddc1; struct i2c_bit_adapter ddc2; }; static int matroxfb_read_gpio(struct matrox_fb_info* minfo) { unsigned long flags; int v; matroxfb_DAC_lock_irqsave(flags); v = matroxfb_DAC_in(minfo, DAC_XGENIODATA); matroxfb_DAC_unlock_irqrestore(flags); return v; } static void matroxfb_set_gpio(struct matrox_fb_info* minfo, int mask, int val) { unsigned long flags; int v; matroxfb_DAC_lock_irqsave(flags); v = (matroxfb_DAC_in(minfo, DAC_XGENIOCTRL) & mask) | val; matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, v); /* We must reset GENIODATA very often... XFree plays with this register */ matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0x00); matroxfb_DAC_unlock_irqrestore(flags); } /* software I2C functions */ static inline void matroxfb_i2c_set(struct matrox_fb_info* minfo, int mask, int state) { if (state) state = 0; else state = mask; matroxfb_set_gpio(minfo, ~mask, state); } static void matroxfb_gpio_setsda(void* data, int state) { struct i2c_bit_adapter* b = data; matroxfb_i2c_set(b->minfo, b->mask.data, state); } static void matroxfb_gpio_setscl(void* data, int state) { struct i2c_bit_adapter* b = data; matroxfb_i2c_set(b->minfo, b->mask.clock, state); } static int matroxfb_gpio_getsda(void* data) { struct i2c_bit_adapter* b = data; return (matroxfb_read_gpio(b->minfo) & b->mask.data) ? 1 : 0; } static int matroxfb_gpio_getscl(void* data) { struct i2c_bit_adapter* b = data; return (matroxfb_read_gpio(b->minfo) & b->mask.clock) ? 1 : 0; } static const struct i2c_algo_bit_data matrox_i2c_algo_template = { .setsda = matroxfb_gpio_setsda, .setscl = matroxfb_gpio_setscl, .getsda = matroxfb_gpio_getsda, .getscl = matroxfb_gpio_getscl, .udelay = 10, .timeout = 100, }; static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo, unsigned int data, unsigned int clock, const char *name, int class) { int err; b->minfo = minfo; b->mask.data = data; b->mask.clock = clock; b->adapter.owner = THIS_MODULE; snprintf(b->adapter.name, sizeof(b->adapter.name), name, minfo->fbcon.node); i2c_set_adapdata(&b->adapter, b); b->adapter.class = class; b->adapter.algo_data = &b->bac; b->adapter.dev.parent = &minfo->pcidev->dev; b->bac = matrox_i2c_algo_template; b->bac.data = b; err = i2c_bit_add_bus(&b->adapter); b->initialized = !err; return err; } static void i2c_bit_bus_del(struct i2c_bit_adapter* b) { if (b->initialized) { i2c_del_adapter(&b->adapter); b->initialized = 0; } } static inline void i2c_maven_done(struct matroxfb_dh_maven_info* minfo2) { i2c_bit_bus_del(&minfo2->maven); } static inline void i2c_ddc1_done(struct matroxfb_dh_maven_info* minfo2) { i2c_bit_bus_del(&minfo2->ddc1); } static inline void i2c_ddc2_done(struct matroxfb_dh_maven_info* minfo2) { i2c_bit_bus_del(&minfo2->ddc2); } static void* i2c_matroxfb_probe(struct matrox_fb_info* minfo) { int err; unsigned long flags; struct matroxfb_dh_maven_info* m2info; m2info = kzalloc(sizeof(*m2info), GFP_KERNEL); if (!m2info) return NULL; matroxfb_DAC_lock_irqsave(flags); matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0xFF); matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, 0x00); matroxfb_DAC_unlock_irqrestore(flags); switch (minfo->chip) { case MGA_2064: case MGA_2164: err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1B_DATA, DDC1B_CLK, "DDC:fb%u #0", I2C_CLASS_DDC); break; default: err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1_DATA, DDC1_CLK, "DDC:fb%u #0", I2C_CLASS_DDC); break; } if (err) goto fail_ddc1; if (minfo->devflags.dualhead) { err = i2c_bus_reg(&m2info->ddc2, minfo, DDC2_DATA, DDC2_CLK, "DDC:fb%u #1", I2C_CLASS_DDC); if (err == -ENODEV) { printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n"); } else if (err) printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n"); /* Register maven bus even on G450/G550 */ err = i2c_bus_reg(&m2info->maven, minfo, MAT_DATA, MAT_CLK, "MAVEN:fb%u", 0); if (err) printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n"); else { struct i2c_board_info maven_info = { I2C_BOARD_INFO("maven", 0x1b), }; unsigned short const addr_list[2] = { 0x1b, I2C_CLIENT_END }; i2c_new_probed_device(&m2info->maven.adapter, &maven_info, addr_list, NULL); } } return m2info; fail_ddc1:; kfree(m2info); printk(KERN_ERR "i2c-matroxfb: Could not register primary adapter DDC bus.\n"); return NULL; } static void i2c_matroxfb_remove(struct matrox_fb_info* minfo, void* data) { struct matroxfb_dh_maven_info* m2info = data; i2c_maven_done(m2info); i2c_ddc2_done(m2info); i2c_ddc1_done(m2info); kfree(m2info); } static struct matroxfb_driver i2c_matroxfb = { .node = LIST_HEAD_INIT(i2c_matroxfb.node), .name = "i2c-matroxfb", .probe = i2c_matroxfb_probe, .remove = i2c_matroxfb_remove, }; static int __init i2c_matroxfb_init(void) { if (matroxfb_register_driver(&i2c_matroxfb)) { printk(KERN_ERR "i2c-matroxfb: failed to register driver\n"); return -ENXIO; } return 0; } static void __exit i2c_matroxfb_exit(void) { matroxfb_unregister_driver(&i2c_matroxfb); } MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec "); MODULE_DESCRIPTION("Support module providing I2C buses present on Matrox videocards"); module_init(i2c_matroxfb_init); module_exit(i2c_matroxfb_exit); /* no __setup required */ MODULE_LICENSE("GPL");