// SPDX-License-Identifier: GPL-2.0-or-later /* SMBus driver for nVidia nForce2 MCP Added nForce3 Pro 150 Thomas Leibold <[email protected]>, Ported to 2.5 Patrick Dreker <[email protected]>, Copyright (c) 2003 Hans-Frieder Vogt <[email protected]>, Based on SMBus 2.0 driver for AMD-8111 IO-Hub Copyright (c) 2002 Vojtech Pavlik */ /* SUPPORTED DEVICES PCI ID nForce2 MCP 0064 nForce2 Ultra 400 MCP 0084 nForce3 Pro150 MCP 00D4 nForce3 250Gb MCP 00E4 nForce4 MCP 0052 nForce4 MCP-04 0034 nForce MCP51 0264 nForce MCP55 0368 nForce MCP61 03EB nForce MCP65 0446 nForce MCP67 0542 nForce MCP73 07D8 nForce MCP78S 0752 nForce MCP79 0AA2 This driver supports the 2 SMBuses that are included in the MCP of the nForce2/3/4/5xx chipsets. */ /* Note: we assume there can only be one nForce2, with two SMBus interfaces */ #include <linux/module.h> #include <linux/pci.h> #include <linux/kernel.h> #include <linux/stddef.h> #include <linux/ioport.h> #include <linux/i2c.h> #include <linux/delay.h> #include <linux/dmi.h> #include <linux/acpi.h> #include <linux/slab.h> #include <linux/io.h> MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; struct nforce2_smbus { … }; /* * nVidia nForce2 SMBus control register definitions * (Newer incarnations use standard BARs 4 and 5 instead) */ #define NFORCE_PCI_SMB1 … #define NFORCE_PCI_SMB2 … /* * ACPI 2.0 chapter 13 SMBus 2.0 EC register model */ #define NVIDIA_SMB_PRTCL … #define NVIDIA_SMB_STS … #define NVIDIA_SMB_ADDR … #define NVIDIA_SMB_CMD … #define NVIDIA_SMB_DATA … #define NVIDIA_SMB_BCNT … #define NVIDIA_SMB_STATUS_ABRT … #define NVIDIA_SMB_CTRL … #define NVIDIA_SMB_STATUS_ABRT_STS … #define NVIDIA_SMB_CTRL_ABORT … #define NVIDIA_SMB_STS_DONE … #define NVIDIA_SMB_STS_ALRM … #define NVIDIA_SMB_STS_RES … #define NVIDIA_SMB_STS_STATUS … #define NVIDIA_SMB_PRTCL_WRITE … #define NVIDIA_SMB_PRTCL_READ … #define NVIDIA_SMB_PRTCL_QUICK … #define NVIDIA_SMB_PRTCL_BYTE … #define NVIDIA_SMB_PRTCL_BYTE_DATA … #define NVIDIA_SMB_PRTCL_WORD_DATA … #define NVIDIA_SMB_PRTCL_BLOCK_DATA … #define NVIDIA_SMB_PRTCL_PEC … /* Misc definitions */ #define MAX_TIMEOUT … /* We disable the second SMBus channel on these boards */ static const struct dmi_system_id nforce2_dmi_blacklist2[] = …; static struct pci_driver nforce2_driver; /* For multiplexing support, we need a global reference to the 1st SMBus channel */ #if IS_ENABLED(CONFIG_I2C_NFORCE2_S4985) struct i2c_adapter *nforce2_smbus; EXPORT_SYMBOL_GPL(…); static void nforce2_set_reference(struct i2c_adapter *adap) { … } #else static inline void nforce2_set_reference(struct i2c_adapter *adap) { } #endif static void nforce2_abort(struct i2c_adapter *adap) { … } static int nforce2_check_status(struct i2c_adapter *adap) { … } /* Return negative errno on error */ static s32 nforce2_access(struct i2c_adapter *adap, u16 addr, unsigned short flags, char read_write, u8 command, int size, union i2c_smbus_data *data) { … } static u32 nforce2_func(struct i2c_adapter *adapter) { … } static const struct i2c_algorithm smbus_algorithm = …; static const struct pci_device_id nforce2_ids[] = …; MODULE_DEVICE_TABLE(pci, nforce2_ids); static int nforce2_probe_smb(struct pci_dev *dev, int bar, int alt_reg, struct nforce2_smbus *smbus, const char *name) { … } static int nforce2_probe(struct pci_dev *dev, const struct pci_device_id *id) { … } static void nforce2_remove(struct pci_dev *dev) { … } static struct pci_driver nforce2_driver = …; module_pci_driver(…) …;
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