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_max_bus_speed (struct hotplug_slot
*slot
, enum pci_bus_speed
*value
);
69 static int get_cur_bus_speed (struct hotplug_slot
*slot
, enum pci_bus_speed
*value
);
71 static struct hotplug_slot_ops shpchp_hotplug_slot_ops
= {
73 .set_attention_status
= set_attention_status
,
74 .enable_slot
= enable_slot
,
75 .disable_slot
= disable_slot
,
76 .get_power_status
= get_power_status
,
77 .get_attention_status
= get_attention_status
,
78 .get_latch_status
= get_latch_status
,
79 .get_adapter_status
= get_adapter_status
,
80 .get_max_bus_speed
= get_max_bus_speed
,
81 .get_cur_bus_speed
= get_cur_bus_speed
,
85 * release_slot - free up the memory used by a slot
86 * @hotplug_slot: slot to free
88 static void release_slot(struct hotplug_slot
*hotplug_slot
)
90 struct slot
*slot
= hotplug_slot
->private;
92 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
94 kfree(slot
->hotplug_slot
->info
);
95 kfree(slot
->hotplug_slot
->name
);
96 kfree(slot
->hotplug_slot
);
100 static int init_slots(struct controller
*ctrl
)
102 struct slot
*new_slot
;
105 u32 slot_number
, sun
;
106 int result
= -ENOMEM
;
108 dbg("%s\n",__FUNCTION__
);
110 number_of_slots
= ctrl
->num_slots
;
111 slot_device
= ctrl
->slot_device_offset
;
112 slot_number
= ctrl
->first_slot
;
114 while (number_of_slots
) {
115 new_slot
= (struct slot
*) kmalloc(sizeof(struct slot
), GFP_KERNEL
);
119 memset(new_slot
, 0, sizeof(struct slot
));
120 new_slot
->hotplug_slot
= kmalloc (sizeof (struct hotplug_slot
), GFP_KERNEL
);
121 if (!new_slot
->hotplug_slot
)
123 memset(new_slot
->hotplug_slot
, 0, sizeof (struct hotplug_slot
));
125 new_slot
->hotplug_slot
->info
= kmalloc (sizeof (struct hotplug_slot_info
), GFP_KERNEL
);
126 if (!new_slot
->hotplug_slot
->info
)
128 memset(new_slot
->hotplug_slot
->info
, 0, sizeof (struct hotplug_slot_info
));
129 new_slot
->hotplug_slot
->name
= kmalloc (SLOT_NAME_SIZE
, GFP_KERNEL
);
130 if (!new_slot
->hotplug_slot
->name
)
133 new_slot
->magic
= SLOT_MAGIC
;
134 new_slot
->ctrl
= ctrl
;
135 new_slot
->bus
= ctrl
->slot_bus
;
136 new_slot
->device
= slot_device
;
137 new_slot
->hpc_ops
= ctrl
->hpc_ops
;
139 if (shpchprm_get_physical_slot_number(ctrl
, &sun
,
140 new_slot
->bus
, new_slot
->device
))
143 new_slot
->number
= sun
;
144 new_slot
->hp_slot
= slot_device
- ctrl
->slot_device_offset
;
146 /* register this slot with the hotplug pci core */
147 new_slot
->hotplug_slot
->private = new_slot
;
148 new_slot
->hotplug_slot
->release
= &release_slot
;
149 make_slot_name(new_slot
->hotplug_slot
->name
, SLOT_NAME_SIZE
, new_slot
);
150 new_slot
->hotplug_slot
->ops
= &shpchp_hotplug_slot_ops
;
152 new_slot
->hpc_ops
->get_power_status(new_slot
, &(new_slot
->hotplug_slot
->info
->power_status
));
153 new_slot
->hpc_ops
->get_attention_status(new_slot
, &(new_slot
->hotplug_slot
->info
->attention_status
));
154 new_slot
->hpc_ops
->get_latch_status(new_slot
, &(new_slot
->hotplug_slot
->info
->latch_status
));
155 new_slot
->hpc_ops
->get_adapter_status(new_slot
, &(new_slot
->hotplug_slot
->info
->adapter_status
));
157 dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x slot_device_offset=%x\n", new_slot
->bus
,
158 new_slot
->device
, new_slot
->hp_slot
, new_slot
->number
, ctrl
->slot_device_offset
);
159 result
= pci_hp_register (new_slot
->hotplug_slot
);
161 err ("pci_hp_register failed with error %d\n", result
);
165 new_slot
->next
= ctrl
->slot
;
166 ctrl
->slot
= new_slot
;
170 slot_number
+= ctrl
->slot_num_inc
;
176 kfree(new_slot
->hotplug_slot
->name
);
178 kfree(new_slot
->hotplug_slot
->info
);
180 kfree(new_slot
->hotplug_slot
);
187 static void cleanup_slots(struct controller
*ctrl
)
189 struct slot
*old_slot
, *next_slot
;
191 old_slot
= ctrl
->slot
;
195 next_slot
= old_slot
->next
;
196 pci_hp_deregister(old_slot
->hotplug_slot
);
197 old_slot
= next_slot
;
201 static int get_ctlr_slot_config(struct controller
*ctrl
)
204 int first_device_num
;
205 int physical_slot_num
;
210 rc
= shpc_get_ctlr_slot_config(ctrl
, &num_ctlr_slots
, &first_device_num
, &physical_slot_num
, &updown
, &flags
);
212 err("%s: get_ctlr_slot_config fail for b:d (%x:%x)\n", __FUNCTION__
, ctrl
->bus
, ctrl
->device
);
216 ctrl
->num_slots
= num_ctlr_slots
;
217 ctrl
->slot_device_offset
= first_device_num
;
218 ctrl
->first_slot
= physical_slot_num
;
219 ctrl
->slot_num_inc
= updown
; /* either -1 or 1 */
221 dbg("%s: num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) updown(%d) for b:d (%x:%x)\n",
222 __FUNCTION__
, num_ctlr_slots
, first_device_num
, physical_slot_num
, updown
, ctrl
->bus
, ctrl
->device
);
229 * set_attention_status - Turns the Amber LED for a slot on, off or blink
231 static int set_attention_status (struct hotplug_slot
*hotplug_slot
, u8 status
)
233 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
235 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
237 hotplug_slot
->info
->attention_status
= status
;
238 slot
->hpc_ops
->set_attention_status(slot
, status
);
244 static int enable_slot (struct hotplug_slot
*hotplug_slot
)
246 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
248 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
250 return shpchp_enable_slot(slot
);
254 static int disable_slot (struct hotplug_slot
*hotplug_slot
)
256 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
258 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
260 return shpchp_disable_slot(slot
);
263 static int get_power_status (struct hotplug_slot
*hotplug_slot
, u8
*value
)
265 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
268 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
270 retval
= slot
->hpc_ops
->get_power_status(slot
, value
);
272 *value
= hotplug_slot
->info
->power_status
;
277 static int get_attention_status (struct hotplug_slot
*hotplug_slot
, u8
*value
)
279 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
282 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
284 retval
= slot
->hpc_ops
->get_attention_status(slot
, value
);
286 *value
= hotplug_slot
->info
->attention_status
;
291 static int get_latch_status (struct hotplug_slot
*hotplug_slot
, u8
*value
)
293 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
296 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
298 retval
= slot
->hpc_ops
->get_latch_status(slot
, value
);
300 *value
= hotplug_slot
->info
->latch_status
;
305 static int get_adapter_status (struct hotplug_slot
*hotplug_slot
, u8
*value
)
307 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
310 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
312 retval
= slot
->hpc_ops
->get_adapter_status(slot
, value
);
314 *value
= hotplug_slot
->info
->adapter_status
;
319 static int get_max_bus_speed (struct hotplug_slot
*hotplug_slot
, enum pci_bus_speed
*value
)
321 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
324 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
326 retval
= slot
->hpc_ops
->get_max_bus_speed(slot
, value
);
328 *value
= PCI_SPEED_UNKNOWN
;
333 static int get_cur_bus_speed (struct hotplug_slot
*hotplug_slot
, enum pci_bus_speed
*value
)
335 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
338 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
340 retval
= slot
->hpc_ops
->get_cur_bus_speed(slot
, value
);
342 *value
= PCI_SPEED_UNKNOWN
;
347 static int is_shpc_capable(struct pci_dev
*dev
)
349 if ((dev
->vendor
== PCI_VENDOR_ID_AMD
) || (dev
->device
==
350 PCI_DEVICE_ID_AMD_GOLAM_7450
))
352 if (pci_find_capability(dev
, PCI_CAP_ID_SHPC
))
358 static int shpc_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
361 struct controller
*ctrl
;
363 int first_device_num
; /* first PCI device number supported by this SHPC */
364 int num_ctlr_slots
; /* number of slots supported by this SHPC */
366 if (!is_shpc_capable(pdev
))
369 ctrl
= (struct controller
*) kmalloc(sizeof(struct controller
), GFP_KERNEL
);
371 err("%s : out of memory\n", __FUNCTION__
);
374 memset(ctrl
, 0, sizeof(struct controller
));
376 dbg("DRV_thread pid = %d\n", current
->pid
);
378 rc
= shpc_init(ctrl
, pdev
);
380 dbg("%s: controller initialization failed\n", SHPC_MODULE_NAME
);
381 goto err_out_free_ctrl
;
384 dbg("%s: controller initialization success\n", __FUNCTION__
);
385 ctrl
->pci_dev
= pdev
; /* pci_dev of the P2P bridge */
387 pci_set_drvdata(pdev
, ctrl
);
389 ctrl
->pci_bus
= kmalloc (sizeof (*ctrl
->pci_bus
), GFP_KERNEL
);
390 if (!ctrl
->pci_bus
) {
391 err("out of memory\n");
393 goto err_out_unmap_mmio_region
;
396 memcpy (ctrl
->pci_bus
, pdev
->bus
, sizeof (*ctrl
->pci_bus
));
397 ctrl
->bus
= pdev
->bus
->number
;
398 ctrl
->slot_bus
= pdev
->subordinate
->number
;
400 ctrl
->device
= PCI_SLOT(pdev
->devfn
);
401 ctrl
->function
= PCI_FUNC(pdev
->devfn
);
402 dbg("ctrl bus=0x%x, device=%x, function=%x, irq=%x\n", ctrl
->bus
, ctrl
->device
, ctrl
->function
, pdev
->irq
);
405 * Save configuration headers for this and subordinate PCI buses
408 rc
= get_ctlr_slot_config(ctrl
);
410 err(msg_initialization_err
, rc
);
411 goto err_out_free_ctrl_bus
;
413 first_device_num
= ctrl
->slot_device_offset
;
414 num_ctlr_slots
= ctrl
->num_slots
;
416 ctrl
->add_support
= 1;
418 /* Setup the slot information structures */
419 rc
= init_slots(ctrl
);
421 err(msg_initialization_err
, 6);
422 goto err_out_free_ctrl_slot
;
425 /* Now hpc_functions (slot->hpc_ops->functions) are ready */
426 t_slot
= shpchp_find_slot(ctrl
, first_device_num
);
428 /* Check for operation bus speed */
429 rc
= t_slot
->hpc_ops
->get_cur_bus_speed(t_slot
, &ctrl
->speed
);
430 dbg("%s: t_slot->hp_slot %x\n", __FUNCTION__
,t_slot
->hp_slot
);
432 if (rc
|| ctrl
->speed
== PCI_SPEED_UNKNOWN
) {
433 err(SHPC_MODULE_NAME
": Can't get current bus speed. Set to 33MHz PCI.\n");
434 ctrl
->speed
= PCI_SPEED_33MHz
;
437 /* Finish setting up the hot plug ctrl device */
438 ctrl
->next_event
= 0;
440 if (!shpchp_ctrl_list
) {
441 shpchp_ctrl_list
= ctrl
;
444 ctrl
->next
= shpchp_ctrl_list
;
445 shpchp_ctrl_list
= ctrl
;
448 shpchp_create_ctrl_files(ctrl
);
452 err_out_free_ctrl_slot
:
454 err_out_free_ctrl_bus
:
455 kfree(ctrl
->pci_bus
);
456 err_out_unmap_mmio_region
:
457 ctrl
->hpc_ops
->release_ctlr(ctrl
);
465 static int shpc_start_thread(void)
469 dbg("Initialize + Start the notification/polling mechanism \n");
471 retval
= shpchp_event_start_thread();
473 dbg("shpchp_event_start_thread() failed\n");
480 static void __exit
unload_shpchpd(void)
482 struct controller
*ctrl
;
483 struct controller
*tctrl
;
485 ctrl
= shpchp_ctrl_list
;
490 kfree (ctrl
->pci_bus
);
492 dbg("%s: calling release_ctlr\n", __FUNCTION__
);
493 ctrl
->hpc_ops
->release_ctlr(ctrl
);
501 /* Stop the notification mechanism */
502 shpchp_event_stop_thread();
507 static struct pci_device_id shpcd_pci_tbl
[] = {
509 .class = ((PCI_CLASS_BRIDGE_PCI
<< 8) | 0x00),
511 .vendor
= PCI_ANY_ID
,
512 .device
= PCI_ANY_ID
,
513 .subvendor
= PCI_ANY_ID
,
514 .subdevice
= PCI_ANY_ID
,
517 { /* end: all zeroes */ }
520 MODULE_DEVICE_TABLE(pci
, shpcd_pci_tbl
);
524 static struct pci_driver shpc_driver
= {
525 .name
= SHPC_MODULE_NAME
,
526 .id_table
= shpcd_pci_tbl
,
528 /* remove: shpc_remove_one, */
533 static int __init
shpcd_init(void)
537 #ifdef CONFIG_HOTPLUG_PCI_SHPC_POLL_EVENT_MODE
538 shpchp_poll_mode
= 1;
541 retval
= shpc_start_thread();
545 retval
= pci_register_driver(&shpc_driver
);
546 dbg("%s: pci_register_driver = %d\n", __FUNCTION__
, retval
);
547 info(DRIVER_DESC
" version: " DRIVER_VERSION
"\n");
551 shpchp_event_stop_thread();
556 static void __exit
shpcd_cleanup(void)
558 dbg("unload_shpchpd()\n");
561 dbg("pci_unregister_driver\n");
562 pci_unregister_driver(&shpc_driver
);
564 info(DRIVER_DESC
" version: " DRIVER_VERSION
" unloaded\n");
567 module_init(shpcd_init
);
568 module_exit(shpcd_cleanup
);