1 // SPDX-License-Identifier: GPL-2.0-or-later
8     This module must be considered BETA unless and until
62 static struct pci_driver sis96x_driver;
63 static struct i2c_adapter sis96x_adapter;
64 static u16 sis96x_smbus_base;
66 static inline u8 sis96x_read(u8 reg)  in sis96x_read()
71 static inline void sis96x_write(u8 reg, u8 data)  in sis96x_write()
79 static int sis96x_transaction(int size)  in sis96x_transaction()
99 			return -EBUSY;  in sis96x_transaction()
124 		result = -ETIMEDOUT;  in sis96x_transaction()
127 	/* device error - probably missing ACK */  in sis96x_transaction()
130 		result = -ENXIO;  in sis96x_transaction()
136 		result = -EIO;  in sis96x_transaction()
150 static s32 sis96x_access(struct i2c_adapter * adap, u16 addr,  in sis96x_access()
173 			sis96x_write(SMB_BYTE, data->byte);  in sis96x_access()
182 			sis96x_write(SMB_BYTE, data->word & 0xff);  in sis96x_access()
183 			sis96x_write(SMB_BYTE + 1, (data->word & 0xff00) >> 8);  in sis96x_access()
190 		dev_warn(&adap->dev, "Unsupported transaction %d\n", size);  in sis96x_access()
191 		return -EOPNOTSUPP;  in sis96x_access()
205 		data->byte = sis96x_read(SMB_BYTE);  in sis96x_access()
210 		data->word = sis96x_read(SMB_BYTE) +  in sis96x_access()
217 static u32 sis96x_func(struct i2c_adapter *adapter)  in sis96x_func()
224 static const struct i2c_algorithm smbus_algorithm = {
229 static struct i2c_adapter sis96x_adapter = {
235 static const struct pci_device_id sis96x_ids[] = {
242 static int sis96x_probe(struct pci_dev *dev,  in sis96x_probe()
249 		dev_err(&dev->dev, "Only one device supported.\n");  in sis96x_probe()
250 		return -EBUSY;  in sis96x_probe()
255 		dev_err(&dev->dev, "Unsupported device class 0x%04x!\n", ww);  in sis96x_probe()
256 		return -ENODEV;  in sis96x_probe()
261 		dev_err(&dev->dev, "SiS96x SMBus base address "  in sis96x_probe()
263 		return -EINVAL;  in sis96x_probe()
265 	dev_info(&dev->dev, "SiS96x SMBus base address: 0x%04x\n",  in sis96x_probe()
268 	retval = acpi_check_resource_conflict(&dev->resource[SIS96x_BAR]);  in sis96x_probe()
270 		return -ENODEV;  in sis96x_probe()
275 		dev_err(&dev->dev, "SMBus registers 0x%04x-0x%04x "  in sis96x_probe()
277 			sis96x_smbus_base + SMB_IOSIZE - 1);  in sis96x_probe()
280 		return -EINVAL;  in sis96x_probe()
284 	sis96x_adapter.dev.parent = &dev->dev;  in sis96x_probe()
290 		dev_err(&dev->dev, "Couldn't register adapter!\n");  in sis96x_probe()
298 static void sis96x_remove(struct pci_dev *dev)  in sis96x_remove()
307 static struct pci_driver sis96x_driver = {