fbdev/nvidia/nv_i2c.c

30 	struct nvidia_i2c_chan *chan = data;
31 	struct nvidia_par *par = chan->par;
34 	val = NVReadCrtc(par, chan->ddc_base + 1) & 0xf0;
41 	NVWriteCrtc(par, chan->ddc_base + 1, val | 0x01);
46 	struct nvidia_i2c_chan *chan = data;
47 	struct nvidia_par *par = chan->par;
50 	val = NVReadCrtc(par, chan->ddc_base + 1) & 0xf0;
57 	NVWriteCrtc(par, chan->ddc_base + 1, val | 0x01);
62 	struct nvidia_i2c_chan *chan = data;
63 	struct nvidia_par *par = chan->par;
66 	if (NVReadCrtc(par, chan->ddc_base) & 0x04)
74 	struct nvidia_i2c_chan *chan = data;
75 	struct nvidia_par *par = chan->par;
78 	if (NVReadCrtc(par, chan->ddc_base) & 0x08)
84 static int nvidia_setup_i2c_bus(struct nvidia_i2c_chan *chan, const char *name,
89 	strscpy(chan->adapter.name, name, sizeof(chan->adapter.name));
90 	chan->adapter.owner = THIS_MODULE;
91 	chan->adapter.class = i2c_class;
92 	chan->adapter.algo_data = &chan->algo;
93 	chan->adapter.dev.parent = &chan->par->pci_dev->dev;
94 	chan->algo.setsda = nvidia_gpio_setsda;
95 	chan->algo.setscl = nvidia_gpio_setscl;
96 	chan->algo.getsda = nvidia_gpio_getsda;
97 	chan->algo.getscl = nvidia_gpio_getscl;
98 	chan->algo.udelay = 40;
99 	chan->algo.timeout = msecs_to_jiffies(2);
100 	chan->algo.data = chan;
102 	i2c_set_adapdata(&chan->adapter, chan);
105 	nvidia_gpio_setsda(chan, 1);
106 	nvidia_gpio_setscl(chan, 1);
109 	rc = i2c_bit_add_bus(&chan->adapter);
111 		dev_dbg(&chan->par->pci_dev->dev,
114 		dev_warn(&chan->par->pci_dev->dev,
116 		chan->par = NULL;
124 	par->chan[0].par = par;
125 	par->chan[1].par = par;
126 	par->chan[2].par = par;
128 	par->chan[0].ddc_base = (par->reverse_i2c) ? 0x36 : 0x3e;
129  	nvidia_setup_i2c_bus(&par->chan[0], "nvidia #0",
132 	par->chan[1].ddc_base = (par->reverse_i2c) ? 0x3e : 0x36;
133  	nvidia_setup_i2c_bus(&par->chan[1], "nvidia #1",
136 	par->chan[2].ddc_base = 0x50;
137  	nvidia_setup_i2c_bus(&par->chan[2], "nvidia #2", 0);
145 		if (!par->chan[i].par)
147 		i2c_del_adapter(&par->chan[i].adapter);
148 		par->chan[i].par = NULL;
157 	if (par->chan[conn - 1].par)
158 		edid = fb_ddc_read(&par->chan[conn - 1].adapter);