fbdev/i810/i810-i2c.c

44         struct i810fb_i2c_chan    *chan = data;
45         struct i810fb_par         *par = chan->par;
49 		i810_writel(mmio, chan->ddc_base, SCL_DIR_MASK | SCL_VAL_MASK);
51 		i810_writel(mmio, chan->ddc_base, SCL_DIR | SCL_DIR_MASK | SCL_VAL_MASK);
52 	i810_readl(mmio, chan->ddc_base);	/* flush posted write */
57         struct i810fb_i2c_chan    *chan = data;
58         struct i810fb_par         *par = chan->par;
62 		i810_writel(mmio, chan->ddc_base, SDA_DIR_MASK | SDA_VAL_MASK);
64 		i810_writel(mmio, chan->ddc_base, SDA_DIR | SDA_DIR_MASK | SDA_VAL_MASK);
65 	i810_readl(mmio, chan->ddc_base);	/* flush posted write */
70         struct i810fb_i2c_chan    *chan = data;
71         struct i810fb_par         *par = chan->par;
74 	i810_writel(mmio, chan->ddc_base, SCL_DIR_MASK);
75 	i810_writel(mmio, chan->ddc_base, 0);
76 	return ((i810_readl(mmio, chan->ddc_base) & SCL_VAL_IN) != 0);
81         struct i810fb_i2c_chan    *chan = data;
82         struct i810fb_par         *par = chan->par;
85 	i810_writel(mmio, chan->ddc_base, SDA_DIR_MASK);
86 	i810_writel(mmio, chan->ddc_base, 0);
87 	return ((i810_readl(mmio, chan->ddc_base) & SDA_VAL_IN) != 0);
90 static int i810_setup_i2c_bus(struct i810fb_i2c_chan *chan, const char *name)
94         strcpy(chan->adapter.name, name);
95         chan->adapter.owner             = THIS_MODULE;
96         chan->adapter.algo_data         = &chan->algo;
97         chan->adapter.dev.parent        = &chan->par->dev->dev;
98 	chan->algo.setsda               = i810i2c_setsda;
99 	chan->algo.setscl               = i810i2c_setscl;
100 	chan->algo.getsda               = i810i2c_getsda;
101 	chan->algo.getscl               = i810i2c_getscl;
102 	chan->algo.udelay               = 10;
103         chan->algo.timeout              = (HZ/2);
104         chan->algo.data                 = chan;
106         i2c_set_adapdata(&chan->adapter, chan);
109         chan->algo.setsda(chan, 1);
110         chan->algo.setscl(chan, 1);
113         rc = i2c_bit_add_bus(&chan->adapter);
116                 dev_dbg(&chan->par->dev->dev, "I2C bus %s registered.\n",name);
118                 dev_warn(&chan->par->dev->dev, "Failed to register I2C bus "
120 		chan->par = NULL;
128         par->chan[0].par        = par;
129 	par->chan[1].par        = par;
130 	par->chan[2].par        = par;
132 	par->chan[0].ddc_base = GPIOA;
133 	i810_setup_i2c_bus(&par->chan[0], "I810-DDC");
134 	par->chan[1].ddc_base = GPIOB;
135 	i810_setup_i2c_bus(&par->chan[1], "I810-I2C");
136 	par->chan[2].ddc_base = GPIOC;
137 	i810_setup_i2c_bus(&par->chan[2], "I810-GPIOC");
142         if (par->chan[0].par)
143 		i2c_del_adapter(&par->chan[0].adapter);
144         par->chan[0].par = NULL;
146 	if (par->chan[1].par)
147 		i2c_del_adapter(&par->chan[1].adapter);
148 	par->chan[1].par = NULL;
150 	if (par->chan[2].par)
151 		i2c_del_adapter(&par->chan[2].adapter);
152 	par->chan[2].par = NULL;
162 		edid = fb_ddc_read(&par->chan[conn].adapter);