// SPDX-License-Identifier: GPL-2.0-or-later /* Copyright (c) 1998 - 2002 Frodo Looijaard <[email protected]> and Philip Edelbrock <[email protected]> */ /* Supports: Intel PIIX4, 440MX Serverworks OSB4, CSB5, CSB6, HT-1000, HT-1100 ATI IXP200, IXP300, IXP400, SB600, SB700/SP5100, SB800 AMD Hudson-2, ML, CZ Hygon CZ SMSC Victory66 Note: we assume there can only be one device, with one or more SMBus interfaces. The device can register multiple i2c_adapters (up to PIIX4_MAX_ADAPTERS). For devices supporting multiple ports the i2c_adapter should provide an i2c_algorithm to access them. */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/pci.h> #include <linux/kernel.h> #include <linux/delay.h> #include <linux/stddef.h> #include <linux/ioport.h> #include <linux/i2c.h> #include <linux/i2c-smbus.h> #include <linux/slab.h> #include <linux/dmi.h> #include <linux/acpi.h> #include <linux/io.h> /* PIIX4 SMBus address offsets */ #define SMBHSTSTS … #define SMBHSLVSTS … #define SMBHSTCNT … #define SMBHSTCMD … #define SMBHSTADD … #define SMBHSTDAT0 … #define SMBHSTDAT1 … #define SMBBLKDAT … #define SMBSLVCNT … #define SMBSHDWCMD … #define SMBSLVEVT … #define SMBSLVDAT … /* count for request_region */ #define SMBIOSIZE … /* PCI Address Constants */ #define SMBBA … #define SMBHSTCFG … #define SMBSLVC … #define SMBSHDW1 … #define SMBSHDW2 … #define SMBREV … /* Other settings */ #define MAX_TIMEOUT … #define ENABLE_INT9 … /* PIIX4 constants */ #define PIIX4_QUICK … #define PIIX4_BYTE … #define PIIX4_BYTE_DATA … #define PIIX4_WORD_DATA … #define PIIX4_BLOCK_DATA … /* Multi-port constants */ #define PIIX4_MAX_ADAPTERS … #define HUDSON2_MAIN_PORTS … /* SB800 constants */ #define SB800_PIIX4_SMB_IDX … #define SB800_PIIX4_SMB_MAP_SIZE … #define KERNCZ_IMC_IDX … #define KERNCZ_IMC_DATA … /* * SB800 port is selected by bits 2:1 of the smb_en register (0x2c) * or the smb_sel register (0x2e), depending on bit 0 of register 0x2f. * Hudson-2/Bolton port is always selected by bits 2:1 of register 0x2f. */ #define SB800_PIIX4_PORT_IDX … #define SB800_PIIX4_PORT_IDX_ALT … #define SB800_PIIX4_PORT_IDX_SEL … #define SB800_PIIX4_PORT_IDX_MASK … #define SB800_PIIX4_PORT_IDX_SHIFT … /* On kerncz and Hudson2, SmBus0Sel is at bit 20:19 of PMx00 DecodeEn */ #define SB800_PIIX4_PORT_IDX_KERNCZ … #define SB800_PIIX4_PORT_IDX_MASK_KERNCZ … #define SB800_PIIX4_PORT_IDX_SHIFT_KERNCZ … #define SB800_PIIX4_FCH_PM_ADDR … #define SB800_PIIX4_FCH_PM_SIZE … /* insmod parameters */ /* If force is set to anything different from 0, we forcibly enable the PIIX4. DANGEROUS! */ static int force; module_param (force, int, 0); MODULE_PARM_DESC(…) …; /* If force_addr is set to anything different from 0, we forcibly enable the PIIX4 at the given address. VERY DANGEROUS! */ static int force_addr; module_param_hw(force_addr, int, ioport, 0); MODULE_PARM_DESC(…) …; static int srvrworks_csb5_delay; static struct pci_driver piix4_driver; static const struct dmi_system_id piix4_dmi_blacklist[] = …; /* The IBM entry is in a separate table because we only check it on Intel-based systems */ static const struct dmi_system_id piix4_dmi_ibm[] = …; /* * SB800 globals */ static u8 piix4_port_sel_sb800; static u8 piix4_port_mask_sb800; static u8 piix4_port_shift_sb800; static const char *piix4_main_port_names_sb800[PIIX4_MAX_ADAPTERS] = …; static const char *piix4_aux_port_name_sb800 = …; struct sb800_mmio_cfg { … }; struct i2c_piix4_adapdata { … }; static int piix4_sb800_region_request(struct device *dev, struct sb800_mmio_cfg *mmio_cfg) { … } static void piix4_sb800_region_release(struct device *dev, struct sb800_mmio_cfg *mmio_cfg) { … } static bool piix4_sb800_use_mmio(struct pci_dev *PIIX4_dev) { … } static int piix4_setup(struct pci_dev *PIIX4_dev, const struct pci_device_id *id) { … } static int piix4_setup_sb800_smba(struct pci_dev *PIIX4_dev, u8 smb_en, u8 aux, u8 *smb_en_status, unsigned short *piix4_smba) { … } static int piix4_setup_sb800(struct pci_dev *PIIX4_dev, const struct pci_device_id *id, u8 aux) { … } static int piix4_setup_aux(struct pci_dev *PIIX4_dev, const struct pci_device_id *id, unsigned short base_reg_addr) { … } static int piix4_transaction(struct i2c_adapter *piix4_adapter) { … } /* Return negative errno on error. */ static s32 piix4_access(struct i2c_adapter * adap, u16 addr, unsigned short flags, char read_write, u8 command, int size, union i2c_smbus_data * data) { … } static uint8_t piix4_imc_read(uint8_t idx) { … } static void piix4_imc_write(uint8_t idx, uint8_t value) { … } static int piix4_imc_sleep(void) { … } static void piix4_imc_wakeup(void) { … } static int piix4_sb800_port_sel(u8 port, struct sb800_mmio_cfg *mmio_cfg) { … } /* * Handles access to multiple SMBus ports on the SB800. * The port is selected by bits 2:1 of the smb_en register (0x2c). * Returns negative errno on error. * * Note: The selected port must be returned to the initial selection to avoid * problems on certain systems. */ static s32 piix4_access_sb800(struct i2c_adapter *adap, u16 addr, unsigned short flags, char read_write, u8 command, int size, union i2c_smbus_data *data) { … } static u32 piix4_func(struct i2c_adapter *adapter) { … } static const struct i2c_algorithm smbus_algorithm = …; static const struct i2c_algorithm piix4_smbus_algorithm_sb800 = …; static const struct pci_device_id piix4_ids[] = …; MODULE_DEVICE_TABLE (pci, piix4_ids); static struct i2c_adapter *piix4_main_adapters[PIIX4_MAX_ADAPTERS]; static struct i2c_adapter *piix4_aux_adapter; static int piix4_adapter_count; static int piix4_add_adapter(struct pci_dev *dev, unsigned short smba, bool sb800_main, u8 port, bool notify_imc, u8 hw_port_nr, const char *name, struct i2c_adapter **padap) { … } static int piix4_add_adapters_sb800(struct pci_dev *dev, unsigned short smba, bool notify_imc) { … } static int piix4_probe(struct pci_dev *dev, const struct pci_device_id *id) { … } static void piix4_adap_remove(struct i2c_adapter *adap) { … } static void piix4_remove(struct pci_dev *dev) { … } static struct pci_driver piix4_driver = …; module_pci_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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