// SPDX-License-Identifier: GPL-2.0-or-later /* Copyright (c) 2002,2003 Alexander Malysh <[email protected]> */ /* Status: beta Supports: SIS 630 SIS 730 SIS 964 Notable differences between chips: +------------------------+--------------------+-------------------+ | | SIS630/730 | SIS964 | +------------------------+--------------------+-------------------+ | Clock | 14kHz/56kHz | 55.56kHz/27.78kHz | | SMBus registers offset | 0x80 | 0xE0 | | SMB_CNT | Bit 1 = Slave Busy | Bit 1 = Bus probe | | (not used yet) | Bit 3 is reserved | Bit 3 = Last byte | | SMB_PCOUNT | Offset + 0x06 | Offset + 0x14 | | SMB_COUNT | 4:0 bits | 5:0 bits | +------------------------+--------------------+-------------------+ (Other differences don't affect the functions provided by the driver) Note: we assume there can only be one device, with one SMBus interface. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/delay.h> #include <linux/pci.h> #include <linux/ioport.h> #include <linux/i2c.h> #include <linux/acpi.h> #include <linux/io.h> /* SIS964 id is defined here as we are the only file using it */ #define PCI_DEVICE_ID_SI_964 … /* SIS630/730/964 SMBus registers */ #define SMB_STS … #define SMB_CNT … #define SMBHOST_CNT … #define SMB_ADDR … #define SMB_CMD … #define SMB_COUNT … #define SMB_BYTE … /* SMB_STS register */ #define BYTE_DONE_STS … #define SMBCOL_STS … #define SMBERR_STS … /* SMB_CNT register */ #define MSTO_EN … #define SMBCLK_SEL … #define SMB_PROBE … #define SMB_HOSTBUSY … /* SMBHOST_CNT register */ #define SMB_KILL … #define SMB_START … /* register count for request_region * As we don't use SMB_PCOUNT, 20 is ok for SiS630 and SiS964 */ #define SIS630_SMB_IOREGION … /* PCI address constants */ /* acpi base address register */ #define SIS630_ACPI_BASE_REG … /* bios control register */ #define SIS630_BIOS_CTL_REG … /* Other settings */ #define MAX_TIMEOUT … /* SIS630 constants */ #define SIS630_QUICK … #define SIS630_BYTE … #define SIS630_BYTE_DATA … #define SIS630_WORD_DATA … #define SIS630_PCALL … #define SIS630_BLOCK_DATA … static struct pci_driver sis630_driver; /* insmod parameters */ static bool high_clock; static bool force; module_param(high_clock, bool, 0); MODULE_PARM_DESC(…) …; module_param(force, bool, 0); MODULE_PARM_DESC(…) …; /* SMBus base address */ static unsigned short smbus_base; /* supported chips */ static int supported[] = …; static inline u8 sis630_read(u8 reg) { … } static inline void sis630_write(u8 reg, u8 data) { … } static int sis630_transaction_start(struct i2c_adapter *adap, int size, u8 *oldclock) { … } static int sis630_transaction_wait(struct i2c_adapter *adap, int size) { … } static void sis630_transaction_end(struct i2c_adapter *adap, u8 oldclock) { … } static int sis630_transaction(struct i2c_adapter *adap, int size) { … } static int sis630_block_data(struct i2c_adapter *adap, union i2c_smbus_data *data, int read_write) { … } /* Return negative errno on error. */ static s32 sis630_access(struct i2c_adapter *adap, u16 addr, unsigned short flags, char read_write, u8 command, int size, union i2c_smbus_data *data) { … } static u32 sis630_func(struct i2c_adapter *adapter) { … } static int sis630_setup(struct pci_dev *sis630_dev) { … } static const struct i2c_algorithm smbus_algorithm = …; static struct i2c_adapter sis630_adapter = …; static const struct pci_device_id sis630_ids[] = …; MODULE_DEVICE_TABLE(pci, sis630_ids); static int sis630_probe(struct pci_dev *dev, const struct pci_device_id *id) { … } static void sis630_remove(struct pci_dev *dev) { … } static struct pci_driver sis630_driver = …; module_pci_driver(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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