1 // SPDX-License-Identifier: GPL-2.0-only
6  * (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
16 #include <linux/i2c.h>
18 #include <linux/i2c-algo-bit.h>
20 /* MGA-TVO I2C for G200, G400 */
23 /* primary head DDC for Mystique(?), G100, G200, G400 */
26 /* primary head DDC for Millennium, Millennium II */
29 /* secondary head DDC for G400 */
63 /* software I2C functions */
74 	matroxfb_i2c_set(b->minfo, b->mask.data, state);  in matroxfb_gpio_setsda()
79 	matroxfb_i2c_set(b->minfo, b->mask.clock, state);  in matroxfb_gpio_setscl()
84 	return (matroxfb_read_gpio(b->minfo) & b->mask.data) ? 1 : 0;  in matroxfb_gpio_getsda()
89 	return (matroxfb_read_gpio(b->minfo) & b->mask.clock) ? 1 : 0;  in matroxfb_gpio_getscl()
107 	b->minfo = minfo;  in i2c_bus_reg()
108 	b->mask.data = data;  in i2c_bus_reg()
109 	b->mask.clock = clock;  in i2c_bus_reg()
110 	b->adapter.owner = THIS_MODULE;  in i2c_bus_reg()
111 	snprintf(b->adapter.name, sizeof(b->adapter.name), name,  in i2c_bus_reg()
112 		minfo->fbcon.node);  in i2c_bus_reg()
113 	i2c_set_adapdata(&b->adapter, b);  in i2c_bus_reg()
114 	b->adapter.algo_data = &b->bac;  in i2c_bus_reg()
115 	b->adapter.dev.parent = &minfo->pcidev->dev;  in i2c_bus_reg()
116 	b->bac = matrox_i2c_algo_template;  in i2c_bus_reg()
117 	b->bac.data = b;  in i2c_bus_reg()
118 	err = i2c_bit_add_bus(&b->adapter);  in i2c_bus_reg()
119 	b->initialized = !err;  in i2c_bus_reg()
124 	if (b->initialized) {  in i2c_bit_bus_del()
125 		i2c_del_adapter(&b->adapter);  in i2c_bit_bus_del()
126 		b->initialized = 0;  in i2c_bit_bus_del()
131 	i2c_bit_bus_del(&minfo2->maven);  in i2c_maven_done()
135 	i2c_bit_bus_del(&minfo2->ddc1);  in i2c_ddc1_done()
139 	i2c_bit_bus_del(&minfo2->ddc2);  in i2c_ddc2_done()
156 	switch (minfo->chip) {  in i2c_matroxfb_probe()
159 			err = i2c_bus_reg(&m2info->ddc1, minfo,  in i2c_matroxfb_probe()
161 					  "DDC:fb%u #0");  in i2c_matroxfb_probe()
164 			err = i2c_bus_reg(&m2info->ddc1, minfo,  in i2c_matroxfb_probe()
166 					  "DDC:fb%u #0");  in i2c_matroxfb_probe()
171 	if (minfo->devflags.dualhead) {  in i2c_matroxfb_probe()
172 		err = i2c_bus_reg(&m2info->ddc2, minfo, DDC2_DATA, DDC2_CLK, "DDC:fb%u #1");  in i2c_matroxfb_probe()
173 		if (err == -ENODEV) {  in i2c_matroxfb_probe()
174 			printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n");  in i2c_matroxfb_probe()
176 …printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n"…  in i2c_matroxfb_probe()
177 		/* Register maven bus even on G450/G550 */  in i2c_matroxfb_probe()
178 		err = i2c_bus_reg(&m2info->maven, minfo, MAT_DATA, MAT_CLK, "MAVEN:fb%u");  in i2c_matroxfb_probe()
180 			printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n");  in i2c_matroxfb_probe()
189 			i2c_new_scanned_device(&m2info->maven.adapter,  in i2c_matroxfb_probe()
196 	printk(KERN_ERR "i2c-matroxfb: Could not register primary adapter DDC bus.\n");  in i2c_matroxfb_probe()
211 	.name =		"i2c-matroxfb",
218 		printk(KERN_ERR "i2c-matroxfb: failed to register driver\n");  in i2c_matroxfb_init()
219 		return -ENXIO;  in i2c_matroxfb_init()
228 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
229 MODULE_DESCRIPTION("Support module providing I2C buses present on Matrox videocards");