// SPDX-License-Identifier: GPL-2.0-or-later /* Copyright (c) 1998 - 2002 Frodo Looijaard <[email protected]>, Philip Edelbrock <[email protected]>, Kyösti Mälkki <[email protected]>, Mark D. Studebaker <[email protected]> Copyright (C) 2005 - 2008 Jean Delvare <[email protected]> */ /* Supports the following VIA south bridges: Chip name PCI ID REV I2C block VT82C596A 0x3050 no VT82C596B 0x3051 no VT82C686A 0x3057 0x30 no VT82C686B 0x3057 0x40 yes VT8231 0x8235 no? VT8233 0x3074 yes VT8233A 0x3147 yes? VT8235 0x3177 yes VT8237R 0x3227 yes VT8237A 0x3337 yes VT8237S 0x3372 yes VT8251 0x3287 yes CX700 0x8324 yes VX800/VX820 0x8353 yes VX855/VX875 0x8409 yes Note: we assume there can only be one device, with one SMBus interface. */ #include <linux/module.h> #include <linux/delay.h> #include <linux/pci.h> #include <linux/kernel.h> #include <linux/stddef.h> #include <linux/ioport.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/acpi.h> #include <linux/io.h> static struct pci_dev *vt596_pdev; #define SMBBA1 … #define SMBBA2 … #define SMBBA3 … /* SMBus address offsets */ static unsigned short vt596_smba; #define SMBHSTSTS … #define SMBHSTCNT … #define SMBHSTCMD … #define SMBHSTADD … #define SMBHSTDAT0 … #define SMBHSTDAT1 … #define SMBBLKDAT … /* PCI Address Constants */ /* SMBus data in configuration space can be found in two places, We try to select the better one */ static unsigned short SMBHSTCFG = …; /* Other settings */ #define MAX_TIMEOUT … /* VT82C596 constants */ #define VT596_QUICK … #define VT596_BYTE … #define VT596_BYTE_DATA … #define VT596_WORD_DATA … #define VT596_PROC_CALL … #define VT596_BLOCK_DATA … #define VT596_I2C_BLOCK_DATA … /* If force is set to anything different from 0, we forcibly enable the VT596. DANGEROUS! */ static bool force; module_param(force, bool, 0); MODULE_PARM_DESC(…) …; /* If force_addr is set to anything different from 0, we forcibly enable the VT596 at the given address. VERY DANGEROUS! */ static u16 force_addr; module_param_hw(force_addr, ushort, ioport, 0); MODULE_PARM_DESC(…) …; static struct pci_driver vt596_driver; static struct i2c_adapter vt596_adapter; #define FEATURE_I2CBLOCK … static unsigned int vt596_features; #ifdef DEBUG static void vt596_dump_regs(const char *msg, u8 size) { … } #else static inline void vt596_dump_regs(const char *msg, u8 size) { } #endif /* Return -1 on error, 0 on success */ static int vt596_transaction(u8 size) { … } /* Return negative errno on error, 0 on success */ static s32 vt596_access(struct i2c_adapter *adap, u16 addr, unsigned short flags, char read_write, u8 command, int size, union i2c_smbus_data *data) { … } static u32 vt596_func(struct i2c_adapter *adapter) { … } static const struct i2c_algorithm smbus_algorithm = …; static struct i2c_adapter vt596_adapter = …; static int vt596_probe(struct pci_dev *pdev, const struct pci_device_id *id) { … } static const struct pci_device_id vt596_ids[] = …; MODULE_DEVICE_TABLE(pci, vt596_ids); static struct pci_driver vt596_driver = …; static int __init i2c_vt596_init(void) { … } static void __exit i2c_vt596_exit(void) { … } MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; module_init(…) …; module_exit(i2c_vt596_exit);
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