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 Corp.
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>
30 #include <linux/module.h>
31 #include <linux/moduleparam.h>
32 #include <linux/kernel.h>
33 #include <linux/types.h>
34 #include <linux/pci.h>
37 /* Global variables */
41 struct controller
*shpchp_ctrl_list
; /* = NULL */
43 #define DRIVER_VERSION "0.4"
44 #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
45 #define DRIVER_DESC "Standard Hot Plug PCI Controller Driver"
47 MODULE_AUTHOR(DRIVER_AUTHOR
);
48 MODULE_DESCRIPTION(DRIVER_DESC
);
49 MODULE_LICENSE("GPL");
51 module_param(shpchp_debug
, bool, 0644);
52 module_param(shpchp_poll_mode
, bool, 0644);
53 module_param(shpchp_poll_time
, int, 0644);
54 MODULE_PARM_DESC(shpchp_debug
, "Debugging mode enabled or not");
55 MODULE_PARM_DESC(shpchp_poll_mode
, "Using polling mechanism for hot-plug events or not");
56 MODULE_PARM_DESC(shpchp_poll_time
, "Polling mechanism frequency, in seconds");
58 #define SHPC_MODULE_NAME "shpchp"
60 static int shpc_start_thread (void);
61 static int set_attention_status (struct hotplug_slot
*slot
, u8 value
);
62 static int enable_slot (struct hotplug_slot
*slot
);
63 static int disable_slot (struct hotplug_slot
*slot
);
64 static int get_power_status (struct hotplug_slot
*slot
, u8
*value
);
65 static int get_attention_status (struct hotplug_slot
*slot
, u8
*value
);
66 static int get_latch_status (struct hotplug_slot
*slot
, u8
*value
);
67 static int get_adapter_status (struct hotplug_slot
*slot
, u8
*value
);
68 static int get_address (struct hotplug_slot
*slot
, u32
*value
);
69 static int get_max_bus_speed (struct hotplug_slot
*slot
, enum pci_bus_speed
*value
);
70 static int get_cur_bus_speed (struct hotplug_slot
*slot
, enum pci_bus_speed
*value
);
72 static struct hotplug_slot_ops shpchp_hotplug_slot_ops
= {
74 .set_attention_status
= set_attention_status
,
75 .enable_slot
= enable_slot
,
76 .disable_slot
= disable_slot
,
77 .get_power_status
= get_power_status
,
78 .get_attention_status
= get_attention_status
,
79 .get_latch_status
= get_latch_status
,
80 .get_adapter_status
= get_adapter_status
,
81 .get_address
= get_address
,
82 .get_max_bus_speed
= get_max_bus_speed
,
83 .get_cur_bus_speed
= get_cur_bus_speed
,
87 * release_slot - free up the memory used by a slot
88 * @hotplug_slot: slot to free
90 static void release_slot(struct hotplug_slot
*hotplug_slot
)
92 struct slot
*slot
= hotplug_slot
->private;
94 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
96 kfree(slot
->hotplug_slot
->info
);
97 kfree(slot
->hotplug_slot
->name
);
98 kfree(slot
->hotplug_slot
);
102 #define SLOT_NAME_SIZE 10
103 static void make_slot_name(struct slot
*slot
)
105 snprintf(slot
->hotplug_slot
->name
, SLOT_NAME_SIZE
, "%04d_%04d",
106 slot
->bus
, slot
->number
);
109 static int init_slots(struct controller
*ctrl
)
112 struct hotplug_slot
*hotplug_slot
;
113 struct hotplug_slot_info
*info
;
115 int retval
= -ENOMEM
;
119 for (i
= 0; i
< ctrl
->num_slots
; i
++) {
120 slot
= kmalloc(sizeof(struct slot
), GFP_KERNEL
);
123 memset(slot
, 0, sizeof(struct slot
));
125 hotplug_slot
= kmalloc(sizeof(struct hotplug_slot
),
129 memset(hotplug_slot
, 0, sizeof(struct hotplug_slot
));
130 slot
->hotplug_slot
= hotplug_slot
;
132 info
= kmalloc(sizeof(struct hotplug_slot_info
), GFP_KERNEL
);
135 memset(info
, 0, sizeof (struct hotplug_slot_info
));
136 hotplug_slot
->info
= info
;
138 name
= kmalloc(SLOT_NAME_SIZE
, GFP_KERNEL
);
141 hotplug_slot
->name
= name
;
144 slot
->magic
= SLOT_MAGIC
;
146 slot
->bus
= ctrl
->slot_bus
;
147 slot
->device
= ctrl
->slot_device_offset
+ i
;
148 slot
->hpc_ops
= ctrl
->hpc_ops
;
150 if (shpchprm_get_physical_slot_number(ctrl
, &sun
,
151 slot
->bus
, slot
->device
))
156 /* register this slot with the hotplug pci core */
157 hotplug_slot
->private = slot
;
158 hotplug_slot
->release
= &release_slot
;
159 make_slot_name(slot
);
160 hotplug_slot
->ops
= &shpchp_hotplug_slot_ops
;
162 get_power_status(hotplug_slot
, &info
->power_status
);
163 get_attention_status(hotplug_slot
, &info
->attention_status
);
164 get_latch_status(hotplug_slot
, &info
->latch_status
);
165 get_adapter_status(hotplug_slot
, &info
->adapter_status
);
167 dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x "
168 "slot_device_offset=%x\n", slot
->bus
, slot
->device
,
169 slot
->hp_slot
, slot
->number
, ctrl
->slot_device_offset
);
170 retval
= pci_hp_register(slot
->hotplug_slot
);
172 err("pci_hp_register failed with error %d\n", retval
);
176 slot
->next
= ctrl
->slot
;
193 static void cleanup_slots(struct controller
*ctrl
)
195 struct slot
*old_slot
, *next_slot
;
197 old_slot
= ctrl
->slot
;
201 next_slot
= old_slot
->next
;
202 pci_hp_deregister(old_slot
->hotplug_slot
);
203 old_slot
= next_slot
;
207 static int get_ctlr_slot_config(struct controller
*ctrl
)
210 int first_device_num
;
211 int physical_slot_num
;
216 rc
= shpc_get_ctlr_slot_config(ctrl
, &num_ctlr_slots
, &first_device_num
, &physical_slot_num
, &updown
, &flags
);
218 err("%s: get_ctlr_slot_config fail for b:d (%x:%x)\n", __FUNCTION__
, ctrl
->bus
, ctrl
->device
);
222 ctrl
->num_slots
= num_ctlr_slots
;
223 ctrl
->slot_device_offset
= first_device_num
;
224 ctrl
->first_slot
= physical_slot_num
;
225 ctrl
->slot_num_inc
= updown
; /* either -1 or 1 */
227 dbg("%s: num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) updown(%d) for b:d (%x:%x)\n",
228 __FUNCTION__
, num_ctlr_slots
, first_device_num
, physical_slot_num
, updown
, ctrl
->bus
, ctrl
->device
);
235 * set_attention_status - Turns the Amber LED for a slot on, off or blink
237 static int set_attention_status (struct hotplug_slot
*hotplug_slot
, u8 status
)
239 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
241 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
243 hotplug_slot
->info
->attention_status
= status
;
244 slot
->hpc_ops
->set_attention_status(slot
, status
);
250 static int enable_slot (struct hotplug_slot
*hotplug_slot
)
252 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
254 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
256 return shpchp_enable_slot(slot
);
260 static int disable_slot (struct hotplug_slot
*hotplug_slot
)
262 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
264 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
266 return shpchp_disable_slot(slot
);
269 static int get_power_status (struct hotplug_slot
*hotplug_slot
, u8
*value
)
271 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
274 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
276 retval
= slot
->hpc_ops
->get_power_status(slot
, value
);
278 *value
= hotplug_slot
->info
->power_status
;
283 static int get_attention_status (struct hotplug_slot
*hotplug_slot
, u8
*value
)
285 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
288 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
290 retval
= slot
->hpc_ops
->get_attention_status(slot
, value
);
292 *value
= hotplug_slot
->info
->attention_status
;
297 static int get_latch_status (struct hotplug_slot
*hotplug_slot
, u8
*value
)
299 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
302 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
304 retval
= slot
->hpc_ops
->get_latch_status(slot
, value
);
306 *value
= hotplug_slot
->info
->latch_status
;
311 static int get_adapter_status (struct hotplug_slot
*hotplug_slot
, u8
*value
)
313 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
316 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
318 retval
= slot
->hpc_ops
->get_adapter_status(slot
, value
);
320 *value
= hotplug_slot
->info
->adapter_status
;
325 static int get_address (struct hotplug_slot
*hotplug_slot
, u32
*value
)
327 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
328 struct pci_bus
*bus
= slot
->ctrl
->pci_dev
->subordinate
;
330 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
332 *value
= (pci_domain_nr(bus
) << 16) | (slot
->bus
<< 8) | slot
->device
;
337 static int get_max_bus_speed (struct hotplug_slot
*hotplug_slot
, enum pci_bus_speed
*value
)
339 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
342 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
344 retval
= slot
->hpc_ops
->get_max_bus_speed(slot
, value
);
346 *value
= PCI_SPEED_UNKNOWN
;
351 static int get_cur_bus_speed (struct hotplug_slot
*hotplug_slot
, enum pci_bus_speed
*value
)
353 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
356 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
358 retval
= slot
->hpc_ops
->get_cur_bus_speed(slot
, value
);
360 *value
= PCI_SPEED_UNKNOWN
;
365 static int is_shpc_capable(struct pci_dev
*dev
)
367 if ((dev
->vendor
== PCI_VENDOR_ID_AMD
) || (dev
->device
==
368 PCI_DEVICE_ID_AMD_GOLAM_7450
))
370 if (pci_find_capability(dev
, PCI_CAP_ID_SHPC
))
376 static int shpc_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
379 struct controller
*ctrl
;
381 int first_device_num
; /* first PCI device number supported by this SHPC */
382 int num_ctlr_slots
; /* number of slots supported by this SHPC */
384 if (!is_shpc_capable(pdev
))
387 ctrl
= (struct controller
*) kmalloc(sizeof(struct controller
), GFP_KERNEL
);
389 err("%s : out of memory\n", __FUNCTION__
);
392 memset(ctrl
, 0, sizeof(struct controller
));
394 rc
= shpc_init(ctrl
, pdev
);
396 dbg("%s: controller initialization failed\n", SHPC_MODULE_NAME
);
397 goto err_out_free_ctrl
;
400 pci_set_drvdata(pdev
, ctrl
);
402 ctrl
->pci_bus
= kmalloc (sizeof (*ctrl
->pci_bus
), GFP_KERNEL
);
403 if (!ctrl
->pci_bus
) {
404 err("out of memory\n");
406 goto err_out_unmap_mmio_region
;
409 memcpy (ctrl
->pci_bus
, pdev
->bus
, sizeof (*ctrl
->pci_bus
));
410 ctrl
->bus
= pdev
->bus
->number
;
411 ctrl
->slot_bus
= pdev
->subordinate
->number
;
413 ctrl
->device
= PCI_SLOT(pdev
->devfn
);
414 ctrl
->function
= PCI_FUNC(pdev
->devfn
);
415 dbg("ctrl bus=0x%x, device=%x, function=%x, irq=%x\n", ctrl
->bus
, ctrl
->device
, ctrl
->function
, pdev
->irq
);
418 * Save configuration headers for this and subordinate PCI buses
421 rc
= get_ctlr_slot_config(ctrl
);
423 err(msg_initialization_err
, rc
);
424 goto err_out_free_ctrl_bus
;
426 first_device_num
= ctrl
->slot_device_offset
;
427 num_ctlr_slots
= ctrl
->num_slots
;
429 ctrl
->add_support
= 1;
431 /* Setup the slot information structures */
432 rc
= init_slots(ctrl
);
434 err(msg_initialization_err
, 6);
435 goto err_out_free_ctrl_slot
;
438 /* Now hpc_functions (slot->hpc_ops->functions) are ready */
439 t_slot
= shpchp_find_slot(ctrl
, first_device_num
);
441 /* Check for operation bus speed */
442 rc
= t_slot
->hpc_ops
->get_cur_bus_speed(t_slot
, &ctrl
->speed
);
443 dbg("%s: t_slot->hp_slot %x\n", __FUNCTION__
,t_slot
->hp_slot
);
445 if (rc
|| ctrl
->speed
== PCI_SPEED_UNKNOWN
) {
446 err(SHPC_MODULE_NAME
": Can't get current bus speed. Set to 33MHz PCI.\n");
447 ctrl
->speed
= PCI_SPEED_33MHz
;
450 /* Finish setting up the hot plug ctrl device */
451 ctrl
->next_event
= 0;
453 if (!shpchp_ctrl_list
) {
454 shpchp_ctrl_list
= ctrl
;
457 ctrl
->next
= shpchp_ctrl_list
;
458 shpchp_ctrl_list
= ctrl
;
461 shpchp_create_ctrl_files(ctrl
);
465 err_out_free_ctrl_slot
:
467 err_out_free_ctrl_bus
:
468 kfree(ctrl
->pci_bus
);
469 err_out_unmap_mmio_region
:
470 ctrl
->hpc_ops
->release_ctlr(ctrl
);
478 static int shpc_start_thread(void)
482 dbg("Initialize + Start the notification/polling mechanism \n");
484 retval
= shpchp_event_start_thread();
486 dbg("shpchp_event_start_thread() failed\n");
493 static void __exit
unload_shpchpd(void)
495 struct controller
*ctrl
;
496 struct controller
*tctrl
;
498 ctrl
= shpchp_ctrl_list
;
501 shpchp_remove_ctrl_files(ctrl
);
504 kfree (ctrl
->pci_bus
);
505 ctrl
->hpc_ops
->release_ctlr(ctrl
);
513 /* Stop the notification mechanism */
514 shpchp_event_stop_thread();
519 static struct pci_device_id shpcd_pci_tbl
[] = {
521 .class = ((PCI_CLASS_BRIDGE_PCI
<< 8) | 0x00),
523 .vendor
= PCI_ANY_ID
,
524 .device
= PCI_ANY_ID
,
525 .subvendor
= PCI_ANY_ID
,
526 .subdevice
= PCI_ANY_ID
,
529 { /* end: all zeroes */ }
532 MODULE_DEVICE_TABLE(pci
, shpcd_pci_tbl
);
536 static struct pci_driver shpc_driver
= {
537 .name
= SHPC_MODULE_NAME
,
538 .id_table
= shpcd_pci_tbl
,
540 /* remove: shpc_remove_one, */
545 static int __init
shpcd_init(void)
549 #ifdef CONFIG_HOTPLUG_PCI_SHPC_POLL_EVENT_MODE
550 shpchp_poll_mode
= 1;
553 retval
= shpc_start_thread();
557 retval
= pci_register_driver(&shpc_driver
);
558 dbg("%s: pci_register_driver = %d\n", __FUNCTION__
, retval
);
559 info(DRIVER_DESC
" version: " DRIVER_VERSION
"\n");
563 shpchp_event_stop_thread();
568 static void __exit
shpcd_cleanup(void)
570 dbg("unload_shpchpd()\n");
573 pci_unregister_driver(&shpc_driver
);
575 info(DRIVER_DESC
" version: " DRIVER_VERSION
" unloaded\n");
578 module_init(shpcd_init
);
579 module_exit(shpcd_cleanup
);