444 lines
14 KiB
C
444 lines
14 KiB
C
/*
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* Standard Hot Plug Controller Driver
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*
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* Copyright (C) 1995,2001 Compaq Computer Corporation
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* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2001 IBM
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* Copyright (C) 2003-2004 Intel Corporation
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Send feedback to <greg@kroah.com>,<kristen.c.accardi@intel.com>
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*
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*/
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#ifndef _SHPCHP_H
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#define _SHPCHP_H
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/pci_hotplug.h>
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#include <linux/delay.h>
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#include <linux/sched.h> /* signal_pending(), struct timer_list */
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#include <linux/mutex.h>
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#if !defined(MODULE)
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#define MY_NAME "shpchp"
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#else
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#define MY_NAME THIS_MODULE->name
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#endif
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extern int shpchp_poll_mode;
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extern int shpchp_poll_time;
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extern int shpchp_debug;
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extern struct workqueue_struct *shpchp_wq;
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/*#define dbg(format, arg...) do { if (shpchp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)*/
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#define dbg(format, arg...) do { if (shpchp_debug) printk("%s: " format, MY_NAME , ## arg); } while (0)
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#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
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#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
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#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
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#define SLOT_NAME_SIZE 10
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struct slot {
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u8 bus;
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u8 device;
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u16 status;
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u32 number;
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u8 is_a_board;
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u8 state;
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u8 presence_save;
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u8 pwr_save;
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struct timer_list task_event;
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u8 hp_slot;
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struct controller *ctrl;
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struct hpc_ops *hpc_ops;
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struct hotplug_slot *hotplug_slot;
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struct list_head slot_list;
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char name[SLOT_NAME_SIZE];
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struct delayed_work work; /* work for button event */
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struct mutex lock;
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};
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struct event_info {
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u32 event_type;
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struct slot *p_slot;
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struct work_struct work;
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};
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struct controller {
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struct mutex crit_sect; /* critical section mutex */
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struct mutex cmd_lock; /* command lock */
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struct php_ctlr_state_s *hpc_ctlr_handle; /* HPC controller handle */
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int num_slots; /* Number of slots on ctlr */
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int slot_num_inc; /* 1 or -1 */
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struct pci_dev *pci_dev;
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struct list_head slot_list;
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struct hpc_ops *hpc_ops;
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wait_queue_head_t queue; /* sleep & wake process */
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u8 bus;
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u8 device;
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u8 function;
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u8 slot_device_offset;
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u8 add_support;
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u32 pcix_misc2_reg; /* for amd pogo errata */
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enum pci_bus_speed speed;
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u32 first_slot; /* First physical slot number */
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u8 slot_bus; /* Bus where the slots handled by this controller sit */
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u32 cap_offset;
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unsigned long mmio_base;
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unsigned long mmio_size;
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};
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/* Define AMD SHPC ID */
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#define PCI_DEVICE_ID_AMD_GOLAM_7450 0x7450
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#define PCI_DEVICE_ID_AMD_POGO_7458 0x7458
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/* AMD PCIX bridge registers */
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#define PCIX_MEM_BASE_LIMIT_OFFSET 0x1C
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#define PCIX_MISCII_OFFSET 0x48
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#define PCIX_MISC_BRIDGE_ERRORS_OFFSET 0x80
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/* AMD PCIX_MISCII masks and offsets */
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#define PERRNONFATALENABLE_MASK 0x00040000
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#define PERRFATALENABLE_MASK 0x00080000
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#define PERRFLOODENABLE_MASK 0x00100000
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#define SERRNONFATALENABLE_MASK 0x00200000
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#define SERRFATALENABLE_MASK 0x00400000
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/* AMD PCIX_MISC_BRIDGE_ERRORS masks and offsets */
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#define PERR_OBSERVED_MASK 0x00000001
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/* AMD PCIX_MEM_BASE_LIMIT masks */
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#define RSE_MASK 0x40000000
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#define INT_BUTTON_IGNORE 0
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#define INT_PRESENCE_ON 1
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#define INT_PRESENCE_OFF 2
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#define INT_SWITCH_CLOSE 3
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#define INT_SWITCH_OPEN 4
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#define INT_POWER_FAULT 5
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#define INT_POWER_FAULT_CLEAR 6
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#define INT_BUTTON_PRESS 7
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#define INT_BUTTON_RELEASE 8
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#define INT_BUTTON_CANCEL 9
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#define STATIC_STATE 0
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#define BLINKINGON_STATE 1
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#define BLINKINGOFF_STATE 2
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#define POWERON_STATE 3
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#define POWEROFF_STATE 4
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#define PCI_TO_PCI_BRIDGE_CLASS 0x00060400
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/* Error messages */
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#define INTERLOCK_OPEN 0x00000002
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#define ADD_NOT_SUPPORTED 0x00000003
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#define CARD_FUNCTIONING 0x00000005
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#define ADAPTER_NOT_SAME 0x00000006
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#define NO_ADAPTER_PRESENT 0x00000009
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#define NOT_ENOUGH_RESOURCES 0x0000000B
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#define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
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#define WRONG_BUS_FREQUENCY 0x0000000D
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#define POWER_FAILURE 0x0000000E
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#define REMOVE_NOT_SUPPORTED 0x00000003
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#define DISABLE_CARD 1
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/*
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* error Messages
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*/
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#define msg_initialization_err "Initialization failure, error=%d\n"
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#define msg_button_on "PCI slot #%s - powering on due to button press.\n"
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#define msg_button_off "PCI slot #%s - powering off due to button press.\n"
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#define msg_button_cancel "PCI slot #%s - action canceled due to button press.\n"
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/* sysfs functions for the hotplug controller info */
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extern int __must_check shpchp_create_ctrl_files(struct controller *ctrl);
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extern int shpchp_sysfs_enable_slot(struct slot *slot);
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extern int shpchp_sysfs_disable_slot(struct slot *slot);
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extern u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id);
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extern u8 shpchp_handle_switch_change(u8 hp_slot, void *inst_id);
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extern u8 shpchp_handle_presence_change(u8 hp_slot, void *inst_id);
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extern u8 shpchp_handle_power_fault(u8 hp_slot, void *inst_id);
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/* pci functions */
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extern int shpchp_save_config(struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);
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extern int shpchp_configure_device(struct slot *p_slot);
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extern int shpchp_unconfigure_device(struct slot *p_slot);
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extern void shpchp_remove_ctrl_files(struct controller *ctrl);
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extern void cleanup_slots(struct controller *ctrl);
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extern void queue_pushbutton_work(struct work_struct *work);
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#ifdef CONFIG_ACPI
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static inline int get_hp_params_from_firmware(struct pci_dev *dev,
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struct hotplug_params *hpp)
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{
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if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev->bus, hpp)))
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return -ENODEV;
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return 0;
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}
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#define get_hp_hw_control_from_firmware(pdev) \
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do { \
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if (DEVICE_ACPI_HANDLE(&(pdev->dev))) \
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acpi_run_oshp(DEVICE_ACPI_HANDLE(&(pdev->dev))); \
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} while (0)
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#else
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#define get_hp_params_from_firmware(dev, hpp) (-ENODEV)
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#define get_hp_hw_control_from_firmware(dev) do { } while (0)
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#endif
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struct ctrl_reg {
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volatile u32 base_offset;
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volatile u32 slot_avail1;
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volatile u32 slot_avail2;
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volatile u32 slot_config;
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volatile u16 sec_bus_config;
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volatile u8 msi_ctrl;
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volatile u8 prog_interface;
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volatile u16 cmd;
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volatile u16 cmd_status;
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volatile u32 intr_loc;
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volatile u32 serr_loc;
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volatile u32 serr_intr_enable;
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volatile u32 slot1;
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volatile u32 slot2;
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volatile u32 slot3;
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volatile u32 slot4;
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volatile u32 slot5;
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volatile u32 slot6;
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volatile u32 slot7;
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volatile u32 slot8;
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volatile u32 slot9;
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volatile u32 slot10;
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volatile u32 slot11;
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volatile u32 slot12;
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} __attribute__ ((packed));
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/* offsets to the controller registers based on the above structure layout */
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enum ctrl_offsets {
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BASE_OFFSET = offsetof(struct ctrl_reg, base_offset),
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SLOT_AVAIL1 = offsetof(struct ctrl_reg, slot_avail1),
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SLOT_AVAIL2 = offsetof(struct ctrl_reg, slot_avail2),
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SLOT_CONFIG = offsetof(struct ctrl_reg, slot_config),
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SEC_BUS_CONFIG = offsetof(struct ctrl_reg, sec_bus_config),
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MSI_CTRL = offsetof(struct ctrl_reg, msi_ctrl),
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PROG_INTERFACE = offsetof(struct ctrl_reg, prog_interface),
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CMD = offsetof(struct ctrl_reg, cmd),
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CMD_STATUS = offsetof(struct ctrl_reg, cmd_status),
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INTR_LOC = offsetof(struct ctrl_reg, intr_loc),
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SERR_LOC = offsetof(struct ctrl_reg, serr_loc),
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SERR_INTR_ENABLE = offsetof(struct ctrl_reg, serr_intr_enable),
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SLOT1 = offsetof(struct ctrl_reg, slot1),
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SLOT2 = offsetof(struct ctrl_reg, slot2),
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SLOT3 = offsetof(struct ctrl_reg, slot3),
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SLOT4 = offsetof(struct ctrl_reg, slot4),
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SLOT5 = offsetof(struct ctrl_reg, slot5),
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SLOT6 = offsetof(struct ctrl_reg, slot6),
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SLOT7 = offsetof(struct ctrl_reg, slot7),
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SLOT8 = offsetof(struct ctrl_reg, slot8),
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SLOT9 = offsetof(struct ctrl_reg, slot9),
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SLOT10 = offsetof(struct ctrl_reg, slot10),
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SLOT11 = offsetof(struct ctrl_reg, slot11),
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SLOT12 = offsetof(struct ctrl_reg, slot12),
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};
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typedef u8(*php_intr_callback_t) (u8 hp_slot, void *instance_id);
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struct php_ctlr_state_s {
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struct php_ctlr_state_s *pnext;
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struct pci_dev *pci_dev;
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unsigned int irq;
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unsigned long flags; /* spinlock's */
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u32 slot_device_offset;
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u32 num_slots;
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struct timer_list int_poll_timer; /* Added for poll event */
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php_intr_callback_t attention_button_callback;
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php_intr_callback_t switch_change_callback;
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php_intr_callback_t presence_change_callback;
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php_intr_callback_t power_fault_callback;
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void *callback_instance_id;
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void __iomem *creg; /* Ptr to controller register space */
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};
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/* Inline functions */
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/* Inline functions to check the sanity of a pointer that is passed to us */
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static inline int slot_paranoia_check (struct slot *slot, const char *function)
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{
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if (!slot) {
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dbg("%s - slot == NULL", function);
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return -1;
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}
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if (!slot->hotplug_slot) {
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dbg("%s - slot->hotplug_slot == NULL!", function);
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return -1;
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}
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return 0;
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}
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static inline struct slot *get_slot (struct hotplug_slot *hotplug_slot, const char *function)
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{
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struct slot *slot;
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if (!hotplug_slot) {
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dbg("%s - hotplug_slot == NULL\n", function);
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return NULL;
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}
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slot = (struct slot *)hotplug_slot->private;
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if (slot_paranoia_check (slot, function))
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return NULL;
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return slot;
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}
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static inline struct slot *shpchp_find_slot (struct controller *ctrl, u8 device)
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{
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struct slot *slot;
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if (!ctrl)
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return NULL;
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list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
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if (slot->device == device)
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return slot;
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}
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err("%s: slot (device=0x%x) not found\n", __FUNCTION__, device);
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return NULL;
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}
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static inline void amd_pogo_errata_save_misc_reg(struct slot *p_slot)
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{
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u32 pcix_misc2_temp;
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/* save MiscII register */
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pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, &pcix_misc2_temp);
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p_slot->ctrl->pcix_misc2_reg = pcix_misc2_temp;
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/* clear SERR/PERR enable bits */
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pcix_misc2_temp &= ~SERRFATALENABLE_MASK;
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pcix_misc2_temp &= ~SERRNONFATALENABLE_MASK;
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pcix_misc2_temp &= ~PERRFLOODENABLE_MASK;
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pcix_misc2_temp &= ~PERRFATALENABLE_MASK;
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pcix_misc2_temp &= ~PERRNONFATALENABLE_MASK;
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pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, pcix_misc2_temp);
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}
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static inline void amd_pogo_errata_restore_misc_reg(struct slot *p_slot)
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{
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u32 pcix_misc2_temp;
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u32 pcix_bridge_errors_reg;
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u32 pcix_mem_base_reg;
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u8 perr_set;
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u8 rse_set;
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/* write-one-to-clear Bridge_Errors[ PERR_OBSERVED ] */
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pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MISC_BRIDGE_ERRORS_OFFSET, &pcix_bridge_errors_reg);
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perr_set = pcix_bridge_errors_reg & PERR_OBSERVED_MASK;
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if (perr_set) {
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dbg ("%s W1C: Bridge_Errors[ PERR_OBSERVED = %08X]\n",__FUNCTION__ , perr_set);
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pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MISC_BRIDGE_ERRORS_OFFSET, perr_set);
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}
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/* write-one-to-clear Memory_Base_Limit[ RSE ] */
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pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MEM_BASE_LIMIT_OFFSET, &pcix_mem_base_reg);
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rse_set = pcix_mem_base_reg & RSE_MASK;
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if (rse_set) {
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dbg ("%s W1C: Memory_Base_Limit[ RSE ]\n",__FUNCTION__ );
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pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MEM_BASE_LIMIT_OFFSET, rse_set);
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}
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/* restore MiscII register */
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pci_read_config_dword( p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, &pcix_misc2_temp );
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if (p_slot->ctrl->pcix_misc2_reg & SERRFATALENABLE_MASK)
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pcix_misc2_temp |= SERRFATALENABLE_MASK;
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else
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pcix_misc2_temp &= ~SERRFATALENABLE_MASK;
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if (p_slot->ctrl->pcix_misc2_reg & SERRNONFATALENABLE_MASK)
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pcix_misc2_temp |= SERRNONFATALENABLE_MASK;
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else
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pcix_misc2_temp &= ~SERRNONFATALENABLE_MASK;
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if (p_slot->ctrl->pcix_misc2_reg & PERRFLOODENABLE_MASK)
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pcix_misc2_temp |= PERRFLOODENABLE_MASK;
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else
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pcix_misc2_temp &= ~PERRFLOODENABLE_MASK;
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if (p_slot->ctrl->pcix_misc2_reg & PERRFATALENABLE_MASK)
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pcix_misc2_temp |= PERRFATALENABLE_MASK;
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else
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pcix_misc2_temp &= ~PERRFATALENABLE_MASK;
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if (p_slot->ctrl->pcix_misc2_reg & PERRNONFATALENABLE_MASK)
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pcix_misc2_temp |= PERRNONFATALENABLE_MASK;
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else
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pcix_misc2_temp &= ~PERRNONFATALENABLE_MASK;
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pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, pcix_misc2_temp);
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}
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enum php_ctlr_type {
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PCI,
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ISA,
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ACPI
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};
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int shpc_init( struct controller *ctrl, struct pci_dev *pdev);
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int shpc_get_ctlr_slot_config( struct controller *ctrl,
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int *num_ctlr_slots,
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int *first_device_num,
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int *physical_slot_num,
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int *updown,
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int *flags);
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struct hpc_ops {
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int (*power_on_slot ) (struct slot *slot);
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int (*slot_enable ) (struct slot *slot);
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int (*slot_disable ) (struct slot *slot);
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int (*set_bus_speed_mode) (struct slot *slot, enum pci_bus_speed speed);
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int (*get_power_status) (struct slot *slot, u8 *status);
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int (*get_attention_status) (struct slot *slot, u8 *status);
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int (*set_attention_status) (struct slot *slot, u8 status);
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int (*get_latch_status) (struct slot *slot, u8 *status);
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int (*get_adapter_status) (struct slot *slot, u8 *status);
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int (*get_max_bus_speed) (struct slot *slot, enum pci_bus_speed *speed);
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int (*get_cur_bus_speed) (struct slot *slot, enum pci_bus_speed *speed);
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int (*get_adapter_speed) (struct slot *slot, enum pci_bus_speed *speed);
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int (*get_mode1_ECC_cap) (struct slot *slot, u8 *mode);
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int (*get_prog_int) (struct slot *slot, u8 *prog_int);
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int (*query_power_fault) (struct slot *slot);
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void (*green_led_on) (struct slot *slot);
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void (*green_led_off) (struct slot *slot);
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void (*green_led_blink) (struct slot *slot);
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void (*release_ctlr) (struct controller *ctrl);
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int (*check_cmd_status) (struct controller *ctrl);
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};
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#endif /* _SHPCHP_H */
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