66 static inline u8 matrox_w1_read_reg(struct matrox_device *dev, u8 reg)  in matrox_w1_read_reg()  argument
70 	writeb(reg, dev->port_index);  in matrox_w1_read_reg()
71 	ret = readb(dev->port_data);  in matrox_w1_read_reg()
77 static inline void matrox_w1_write_reg(struct matrox_device *dev, u8 reg, u8 val)  in matrox_w1_write_reg()  argument
79 	writeb(reg, dev->port_index);  in matrox_w1_write_reg()
80 	writeb(val, dev->port_data);  in matrox_w1_write_reg()
87 	struct matrox_device *dev = data;  in matrox_w1_write_ddc_bit()  local
92 		bit = dev->data_mask;  in matrox_w1_write_ddc_bit()
94 	ret = matrox_w1_read_reg(dev, MATROX_GET_CONTROL);  in matrox_w1_write_ddc_bit()
95 	matrox_w1_write_reg(dev, MATROX_GET_CONTROL, ((ret & ~dev->data_mask) | bit));  in matrox_w1_write_ddc_bit()
96 	matrox_w1_write_reg(dev, MATROX_GET_DATA, 0x00);  in matrox_w1_write_ddc_bit()
102 	struct matrox_device *dev = data;  in matrox_w1_read_ddc_bit()  local
104 	ret = matrox_w1_read_reg(dev, MATROX_GET_DATA);  in matrox_w1_read_ddc_bit()
109 static void matrox_w1_hw_init(struct matrox_device *dev)  in matrox_w1_hw_init()  argument
111 	matrox_w1_write_reg(dev, MATROX_GET_DATA, 0xFF);  in matrox_w1_hw_init()
112 	matrox_w1_write_reg(dev, MATROX_GET_CONTROL, 0x00);  in matrox_w1_hw_init()
117 	struct matrox_device *dev;  in matrox_w1_probe()  local
123 	dev = kzalloc(sizeof(struct matrox_device) +  in matrox_w1_probe()
125 	if (!dev)  in matrox_w1_probe()
128 	dev->bus_master = (struct w1_bus_master *)(dev + 1);  in matrox_w1_probe()
134 	dev->phys_addr = pci_resource_start(pdev, 1);  in matrox_w1_probe()
136 	dev->virt_addr = ioremap(dev->phys_addr, 16384);  in matrox_w1_probe()
137 	if (!dev->virt_addr) {  in matrox_w1_probe()
138 		dev_err(&pdev->dev, "%s: failed to ioremap(0x%lx, %d).\n",  in matrox_w1_probe()
139 			__func__, dev->phys_addr, 16384);  in matrox_w1_probe()
144 	dev->base_addr = dev->virt_addr + MATROX_BASE;  in matrox_w1_probe()
145 	dev->port_index = dev->base_addr + MATROX_PORT_INDEX_OFFSET;  in matrox_w1_probe()
146 	dev->port_data = dev->base_addr + MATROX_PORT_DATA_OFFSET;  in matrox_w1_probe()
147 	dev->data_mask = (MATROX_G400_DDC_DATA);  in matrox_w1_probe()
149 	matrox_w1_hw_init(dev);  in matrox_w1_probe()
151 	dev->bus_master->data = dev;  in matrox_w1_probe()
152 	dev->bus_master->read_bit = &matrox_w1_read_ddc_bit;  in matrox_w1_probe()
153 	dev->bus_master->write_bit = &matrox_w1_write_ddc_bit;  in matrox_w1_probe()
155 	err = w1_add_master_device(dev->bus_master);  in matrox_w1_probe()
159 	pci_set_drvdata(pdev, dev);  in matrox_w1_probe()
161 	dev->found = 1;  in matrox_w1_probe()
163 	dev_info(&pdev->dev, "Matrox G400 GPIO transport layer for 1-wire.\n");  in matrox_w1_probe()
168 	if (dev->virt_addr)  in matrox_w1_probe()
169 		iounmap(dev->virt_addr);  in matrox_w1_probe()
170 	kfree(dev);  in matrox_w1_probe()
177 	struct matrox_device *dev = pci_get_drvdata(pdev);  in matrox_w1_remove()  local
179 	if (dev->found) {  in matrox_w1_remove()
180 		w1_remove_master_device(dev->bus_master);  in matrox_w1_remove()
181 		iounmap(dev->virt_addr);  in matrox_w1_remove()
183 	kfree(dev);  in matrox_w1_remove()