2 * Standard Hot Plug Controller Driver
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM
7 * Copyright (C) 2003-2004 Intel Corporation
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT. See the GNU General Public License for more
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 * Send feedback to <greg@kroah.com>,<kristen.c.accardi@intel.com>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <linux/pci_hotplug.h>
35 #include <linux/delay.h>
36 #include <linux/sched.h> /* signal_pending(), struct timer_list */
37 #include <linux/mutex.h>
40 #define MY_NAME "shpchp"
42 #define MY_NAME THIS_MODULE->name
45 extern int shpchp_poll_mode;
46 extern int shpchp_poll_time;
47 extern int shpchp_debug;
48 extern struct workqueue_struct *shpchp_wq;
50 #define dbg(format, arg...) \
53 printk("%s: " format, MY_NAME , ## arg); \
55 #define err(format, arg...) \
56 printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
57 #define info(format, arg...) \
58 printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
59 #define warn(format, arg...) \
60 printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
62 #define SLOT_NAME_SIZE 10
72 struct timer_list task_event;
74 struct controller *ctrl;
75 struct hpc_ops *hpc_ops;
76 struct hotplug_slot *hotplug_slot;
77 struct list_head slot_list;
78 char name[SLOT_NAME_SIZE];
79 struct delayed_work work; /* work for button event */
86 struct work_struct work;
90 struct mutex crit_sect; /* critical section mutex */
91 struct mutex cmd_lock; /* command lock */
92 int num_slots; /* Number of slots on ctlr */
93 int slot_num_inc; /* 1 or -1 */
94 struct pci_dev *pci_dev;
95 struct list_head slot_list;
96 struct hpc_ops *hpc_ops;
97 wait_queue_head_t queue; /* sleep & wake process */
98 u8 slot_device_offset;
99 u32 pcix_misc2_reg; /* for amd pogo errata */
100 u32 first_slot; /* First physical slot number */
102 unsigned long mmio_base;
103 unsigned long mmio_size;
105 struct timer_list poll_timer;
108 /* Define AMD SHPC ID */
109 #define PCI_DEVICE_ID_AMD_GOLAM_7450 0x7450
110 #define PCI_DEVICE_ID_AMD_POGO_7458 0x7458
112 /* AMD PCIX bridge registers */
113 #define PCIX_MEM_BASE_LIMIT_OFFSET 0x1C
114 #define PCIX_MISCII_OFFSET 0x48
115 #define PCIX_MISC_BRIDGE_ERRORS_OFFSET 0x80
117 /* AMD PCIX_MISCII masks and offsets */
118 #define PERRNONFATALENABLE_MASK 0x00040000
119 #define PERRFATALENABLE_MASK 0x00080000
120 #define PERRFLOODENABLE_MASK 0x00100000
121 #define SERRNONFATALENABLE_MASK 0x00200000
122 #define SERRFATALENABLE_MASK 0x00400000
124 /* AMD PCIX_MISC_BRIDGE_ERRORS masks and offsets */
125 #define PERR_OBSERVED_MASK 0x00000001
127 /* AMD PCIX_MEM_BASE_LIMIT masks */
128 #define RSE_MASK 0x40000000
130 #define INT_BUTTON_IGNORE 0
131 #define INT_PRESENCE_ON 1
132 #define INT_PRESENCE_OFF 2
133 #define INT_SWITCH_CLOSE 3
134 #define INT_SWITCH_OPEN 4
135 #define INT_POWER_FAULT 5
136 #define INT_POWER_FAULT_CLEAR 6
137 #define INT_BUTTON_PRESS 7
138 #define INT_BUTTON_RELEASE 8
139 #define INT_BUTTON_CANCEL 9
141 #define STATIC_STATE 0
142 #define BLINKINGON_STATE 1
143 #define BLINKINGOFF_STATE 2
144 #define POWERON_STATE 3
145 #define POWEROFF_STATE 4
148 #define INTERLOCK_OPEN 0x00000002
149 #define ADD_NOT_SUPPORTED 0x00000003
150 #define CARD_FUNCTIONING 0x00000005
151 #define ADAPTER_NOT_SAME 0x00000006
152 #define NO_ADAPTER_PRESENT 0x00000009
153 #define NOT_ENOUGH_RESOURCES 0x0000000B
154 #define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
155 #define WRONG_BUS_FREQUENCY 0x0000000D
156 #define POWER_FAILURE 0x0000000E
158 extern int __must_check shpchp_create_ctrl_files(struct controller *ctrl);
159 extern void shpchp_remove_ctrl_files(struct controller *ctrl);
160 extern int shpchp_sysfs_enable_slot(struct slot *slot);
161 extern int shpchp_sysfs_disable_slot(struct slot *slot);
162 extern u8 shpchp_handle_attention_button(u8 hp_slot, struct controller *ctrl);
163 extern u8 shpchp_handle_switch_change(u8 hp_slot, struct controller *ctrl);
164 extern u8 shpchp_handle_presence_change(u8 hp_slot, struct controller *ctrl);
165 extern u8 shpchp_handle_power_fault(u8 hp_slot, struct controller *ctrl);
166 extern int shpchp_configure_device(struct slot *p_slot);
167 extern int shpchp_unconfigure_device(struct slot *p_slot);
168 extern void cleanup_slots(struct controller *ctrl);
169 extern void shpchp_queue_pushbutton_work(struct work_struct *work);
170 extern int shpc_init( struct controller *ctrl, struct pci_dev *pdev);
173 #include <linux/pci-acpi.h>
174 static inline int get_hp_params_from_firmware(struct pci_dev *dev,
175 struct hotplug_params *hpp)
177 if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev->bus, hpp)))
182 static inline int get_hp_hw_control_from_firmware(struct pci_dev *dev)
184 u32 flags = OSC_SHPC_NATIVE_HP_CONTROL;
185 return acpi_get_hp_hw_control_from_firmware(dev, flags);
188 #define get_hp_params_from_firmware(dev, hpp) (-ENODEV)
189 #define get_hp_hw_control_from_firmware(dev) (0)
193 volatile u32 base_offset;
194 volatile u32 slot_avail1;
195 volatile u32 slot_avail2;
196 volatile u32 slot_config;
197 volatile u16 sec_bus_config;
198 volatile u8 msi_ctrl;
199 volatile u8 prog_interface;
201 volatile u16 cmd_status;
202 volatile u32 intr_loc;
203 volatile u32 serr_loc;
204 volatile u32 serr_intr_enable;
206 } __attribute__ ((packed));
208 /* offsets to the controller registers based on the above structure layout */
210 BASE_OFFSET = offsetof(struct ctrl_reg, base_offset),
211 SLOT_AVAIL1 = offsetof(struct ctrl_reg, slot_avail1),
212 SLOT_AVAIL2 = offsetof(struct ctrl_reg, slot_avail2),
213 SLOT_CONFIG = offsetof(struct ctrl_reg, slot_config),
214 SEC_BUS_CONFIG = offsetof(struct ctrl_reg, sec_bus_config),
215 MSI_CTRL = offsetof(struct ctrl_reg, msi_ctrl),
216 PROG_INTERFACE = offsetof(struct ctrl_reg, prog_interface),
217 CMD = offsetof(struct ctrl_reg, cmd),
218 CMD_STATUS = offsetof(struct ctrl_reg, cmd_status),
219 INTR_LOC = offsetof(struct ctrl_reg, intr_loc),
220 SERR_LOC = offsetof(struct ctrl_reg, serr_loc),
221 SERR_INTR_ENABLE = offsetof(struct ctrl_reg, serr_intr_enable),
222 SLOT1 = offsetof(struct ctrl_reg, slot1),
225 static inline struct slot *get_slot(struct hotplug_slot *hotplug_slot)
227 return hotplug_slot->private;
230 static inline struct slot *shpchp_find_slot(struct controller *ctrl, u8 device)
234 list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
235 if (slot->device == device)
239 err("%s: slot (device=0x%x) not found\n", __func__, device);
243 static inline void amd_pogo_errata_save_misc_reg(struct slot *p_slot)
247 /* save MiscII register */
248 pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, &pcix_misc2_temp);
250 p_slot->ctrl->pcix_misc2_reg = pcix_misc2_temp;
252 /* clear SERR/PERR enable bits */
253 pcix_misc2_temp &= ~SERRFATALENABLE_MASK;
254 pcix_misc2_temp &= ~SERRNONFATALENABLE_MASK;
255 pcix_misc2_temp &= ~PERRFLOODENABLE_MASK;
256 pcix_misc2_temp &= ~PERRFATALENABLE_MASK;
257 pcix_misc2_temp &= ~PERRNONFATALENABLE_MASK;
258 pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, pcix_misc2_temp);
261 static inline void amd_pogo_errata_restore_misc_reg(struct slot *p_slot)
264 u32 pcix_bridge_errors_reg;
265 u32 pcix_mem_base_reg;
269 /* write-one-to-clear Bridge_Errors[ PERR_OBSERVED ] */
270 pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MISC_BRIDGE_ERRORS_OFFSET, &pcix_bridge_errors_reg);
271 perr_set = pcix_bridge_errors_reg & PERR_OBSERVED_MASK;
273 dbg ("%s W1C: Bridge_Errors[ PERR_OBSERVED = %08X]\n",__func__ , perr_set);
275 pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MISC_BRIDGE_ERRORS_OFFSET, perr_set);
278 /* write-one-to-clear Memory_Base_Limit[ RSE ] */
279 pci_read_config_dword(p_slot->ctrl->pci_dev, PCIX_MEM_BASE_LIMIT_OFFSET, &pcix_mem_base_reg);
280 rse_set = pcix_mem_base_reg & RSE_MASK;
282 dbg ("%s W1C: Memory_Base_Limit[ RSE ]\n",__func__ );
284 pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MEM_BASE_LIMIT_OFFSET, rse_set);
286 /* restore MiscII register */
287 pci_read_config_dword( p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, &pcix_misc2_temp );
289 if (p_slot->ctrl->pcix_misc2_reg & SERRFATALENABLE_MASK)
290 pcix_misc2_temp |= SERRFATALENABLE_MASK;
292 pcix_misc2_temp &= ~SERRFATALENABLE_MASK;
294 if (p_slot->ctrl->pcix_misc2_reg & SERRNONFATALENABLE_MASK)
295 pcix_misc2_temp |= SERRNONFATALENABLE_MASK;
297 pcix_misc2_temp &= ~SERRNONFATALENABLE_MASK;
299 if (p_slot->ctrl->pcix_misc2_reg & PERRFLOODENABLE_MASK)
300 pcix_misc2_temp |= PERRFLOODENABLE_MASK;
302 pcix_misc2_temp &= ~PERRFLOODENABLE_MASK;
304 if (p_slot->ctrl->pcix_misc2_reg & PERRFATALENABLE_MASK)
305 pcix_misc2_temp |= PERRFATALENABLE_MASK;
307 pcix_misc2_temp &= ~PERRFATALENABLE_MASK;
309 if (p_slot->ctrl->pcix_misc2_reg & PERRNONFATALENABLE_MASK)
310 pcix_misc2_temp |= PERRNONFATALENABLE_MASK;
312 pcix_misc2_temp &= ~PERRNONFATALENABLE_MASK;
313 pci_write_config_dword(p_slot->ctrl->pci_dev, PCIX_MISCII_OFFSET, pcix_misc2_temp);
317 int (*power_on_slot)(struct slot *slot);
318 int (*slot_enable)(struct slot *slot);
319 int (*slot_disable)(struct slot *slot);
320 int (*set_bus_speed_mode)(struct slot *slot, enum pci_bus_speed speed);
321 int (*get_power_status)(struct slot *slot, u8 *status);
322 int (*get_attention_status)(struct slot *slot, u8 *status);
323 int (*set_attention_status)(struct slot *slot, u8 status);
324 int (*get_latch_status)(struct slot *slot, u8 *status);
325 int (*get_adapter_status)(struct slot *slot, u8 *status);
326 int (*get_max_bus_speed)(struct slot *slot, enum pci_bus_speed *speed);
327 int (*get_cur_bus_speed)(struct slot *slot, enum pci_bus_speed *speed);
328 int (*get_adapter_speed)(struct slot *slot, enum pci_bus_speed *speed);
329 int (*get_mode1_ECC_cap)(struct slot *slot, u8 *mode);
330 int (*get_prog_int)(struct slot *slot, u8 *prog_int);
331 int (*query_power_fault)(struct slot *slot);
332 void (*green_led_on)(struct slot *slot);
333 void (*green_led_off)(struct slot *slot);
334 void (*green_led_blink)(struct slot *slot);
335 void (*release_ctlr)(struct controller *ctrl);
336 int (*check_cmd_status)(struct controller *ctrl);
339 #endif /* _SHPCHP_H */