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 number_of_slots
= ctrl
->num_slots
;
109 slot_device
= ctrl
->slot_device_offset
;
110 slot_number
= ctrl
->first_slot
;
112 while (number_of_slots
) {
113 new_slot
= (struct slot
*) kmalloc(sizeof(struct slot
), GFP_KERNEL
);
117 memset(new_slot
, 0, sizeof(struct slot
));
118 new_slot
->hotplug_slot
= kmalloc (sizeof (struct hotplug_slot
), GFP_KERNEL
);
119 if (!new_slot
->hotplug_slot
)
121 memset(new_slot
->hotplug_slot
, 0, sizeof (struct hotplug_slot
));
123 new_slot
->hotplug_slot
->info
= kmalloc (sizeof (struct hotplug_slot_info
), GFP_KERNEL
);
124 if (!new_slot
->hotplug_slot
->info
)
126 memset(new_slot
->hotplug_slot
->info
, 0, sizeof (struct hotplug_slot_info
));
127 new_slot
->hotplug_slot
->name
= kmalloc (SLOT_NAME_SIZE
, GFP_KERNEL
);
128 if (!new_slot
->hotplug_slot
->name
)
131 new_slot
->magic
= SLOT_MAGIC
;
132 new_slot
->ctrl
= ctrl
;
133 new_slot
->bus
= ctrl
->slot_bus
;
134 new_slot
->device
= slot_device
;
135 new_slot
->hpc_ops
= ctrl
->hpc_ops
;
137 if (shpchprm_get_physical_slot_number(ctrl
, &sun
,
138 new_slot
->bus
, new_slot
->device
))
141 new_slot
->number
= sun
;
142 new_slot
->hp_slot
= slot_device
- ctrl
->slot_device_offset
;
144 /* register this slot with the hotplug pci core */
145 new_slot
->hotplug_slot
->private = new_slot
;
146 new_slot
->hotplug_slot
->release
= &release_slot
;
147 make_slot_name(new_slot
->hotplug_slot
->name
, SLOT_NAME_SIZE
, new_slot
);
148 new_slot
->hotplug_slot
->ops
= &shpchp_hotplug_slot_ops
;
150 new_slot
->hpc_ops
->get_power_status(new_slot
, &(new_slot
->hotplug_slot
->info
->power_status
));
151 new_slot
->hpc_ops
->get_attention_status(new_slot
, &(new_slot
->hotplug_slot
->info
->attention_status
));
152 new_slot
->hpc_ops
->get_latch_status(new_slot
, &(new_slot
->hotplug_slot
->info
->latch_status
));
153 new_slot
->hpc_ops
->get_adapter_status(new_slot
, &(new_slot
->hotplug_slot
->info
->adapter_status
));
155 dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x slot_device_offset=%x\n", new_slot
->bus
,
156 new_slot
->device
, new_slot
->hp_slot
, new_slot
->number
, ctrl
->slot_device_offset
);
157 result
= pci_hp_register (new_slot
->hotplug_slot
);
159 err ("pci_hp_register failed with error %d\n", result
);
163 new_slot
->next
= ctrl
->slot
;
164 ctrl
->slot
= new_slot
;
168 slot_number
+= ctrl
->slot_num_inc
;
174 kfree(new_slot
->hotplug_slot
->name
);
176 kfree(new_slot
->hotplug_slot
->info
);
178 kfree(new_slot
->hotplug_slot
);
185 static void cleanup_slots(struct controller
*ctrl
)
187 struct slot
*old_slot
, *next_slot
;
189 old_slot
= ctrl
->slot
;
193 next_slot
= old_slot
->next
;
194 pci_hp_deregister(old_slot
->hotplug_slot
);
195 old_slot
= next_slot
;
199 static int get_ctlr_slot_config(struct controller
*ctrl
)
202 int first_device_num
;
203 int physical_slot_num
;
208 rc
= shpc_get_ctlr_slot_config(ctrl
, &num_ctlr_slots
, &first_device_num
, &physical_slot_num
, &updown
, &flags
);
210 err("%s: get_ctlr_slot_config fail for b:d (%x:%x)\n", __FUNCTION__
, ctrl
->bus
, ctrl
->device
);
214 ctrl
->num_slots
= num_ctlr_slots
;
215 ctrl
->slot_device_offset
= first_device_num
;
216 ctrl
->first_slot
= physical_slot_num
;
217 ctrl
->slot_num_inc
= updown
; /* either -1 or 1 */
219 dbg("%s: num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) updown(%d) for b:d (%x:%x)\n",
220 __FUNCTION__
, num_ctlr_slots
, first_device_num
, physical_slot_num
, updown
, ctrl
->bus
, ctrl
->device
);
227 * set_attention_status - Turns the Amber LED for a slot on, off or blink
229 static int set_attention_status (struct hotplug_slot
*hotplug_slot
, u8 status
)
231 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
233 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
235 hotplug_slot
->info
->attention_status
= status
;
236 slot
->hpc_ops
->set_attention_status(slot
, status
);
242 static int enable_slot (struct hotplug_slot
*hotplug_slot
)
244 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
246 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
248 return shpchp_enable_slot(slot
);
252 static int disable_slot (struct hotplug_slot
*hotplug_slot
)
254 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
256 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
258 return shpchp_disable_slot(slot
);
261 static int get_power_status (struct hotplug_slot
*hotplug_slot
, u8
*value
)
263 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
266 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
268 retval
= slot
->hpc_ops
->get_power_status(slot
, value
);
270 *value
= hotplug_slot
->info
->power_status
;
275 static int get_attention_status (struct hotplug_slot
*hotplug_slot
, u8
*value
)
277 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
280 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
282 retval
= slot
->hpc_ops
->get_attention_status(slot
, value
);
284 *value
= hotplug_slot
->info
->attention_status
;
289 static int get_latch_status (struct hotplug_slot
*hotplug_slot
, u8
*value
)
291 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
294 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
296 retval
= slot
->hpc_ops
->get_latch_status(slot
, value
);
298 *value
= hotplug_slot
->info
->latch_status
;
303 static int get_adapter_status (struct hotplug_slot
*hotplug_slot
, u8
*value
)
305 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
308 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
310 retval
= slot
->hpc_ops
->get_adapter_status(slot
, value
);
312 *value
= hotplug_slot
->info
->adapter_status
;
317 static int get_max_bus_speed (struct hotplug_slot
*hotplug_slot
, enum pci_bus_speed
*value
)
319 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
322 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
324 retval
= slot
->hpc_ops
->get_max_bus_speed(slot
, value
);
326 *value
= PCI_SPEED_UNKNOWN
;
331 static int get_cur_bus_speed (struct hotplug_slot
*hotplug_slot
, enum pci_bus_speed
*value
)
333 struct slot
*slot
= get_slot (hotplug_slot
, __FUNCTION__
);
336 dbg("%s - physical_slot = %s\n", __FUNCTION__
, hotplug_slot
->name
);
338 retval
= slot
->hpc_ops
->get_cur_bus_speed(slot
, value
);
340 *value
= PCI_SPEED_UNKNOWN
;
345 static int is_shpc_capable(struct pci_dev
*dev
)
347 if ((dev
->vendor
== PCI_VENDOR_ID_AMD
) || (dev
->device
==
348 PCI_DEVICE_ID_AMD_GOLAM_7450
))
350 if (pci_find_capability(dev
, PCI_CAP_ID_SHPC
))
356 static int shpc_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
359 struct controller
*ctrl
;
361 int first_device_num
; /* first PCI device number supported by this SHPC */
362 int num_ctlr_slots
; /* number of slots supported by this SHPC */
364 if (!is_shpc_capable(pdev
))
367 ctrl
= (struct controller
*) kmalloc(sizeof(struct controller
), GFP_KERNEL
);
369 err("%s : out of memory\n", __FUNCTION__
);
372 memset(ctrl
, 0, sizeof(struct controller
));
374 rc
= shpc_init(ctrl
, pdev
);
376 dbg("%s: controller initialization failed\n", SHPC_MODULE_NAME
);
377 goto err_out_free_ctrl
;
380 pci_set_drvdata(pdev
, ctrl
);
382 ctrl
->pci_bus
= kmalloc (sizeof (*ctrl
->pci_bus
), GFP_KERNEL
);
383 if (!ctrl
->pci_bus
) {
384 err("out of memory\n");
386 goto err_out_unmap_mmio_region
;
389 memcpy (ctrl
->pci_bus
, pdev
->bus
, sizeof (*ctrl
->pci_bus
));
390 ctrl
->bus
= pdev
->bus
->number
;
391 ctrl
->slot_bus
= pdev
->subordinate
->number
;
393 ctrl
->device
= PCI_SLOT(pdev
->devfn
);
394 ctrl
->function
= PCI_FUNC(pdev
->devfn
);
395 dbg("ctrl bus=0x%x, device=%x, function=%x, irq=%x\n", ctrl
->bus
, ctrl
->device
, ctrl
->function
, pdev
->irq
);
398 * Save configuration headers for this and subordinate PCI buses
401 rc
= get_ctlr_slot_config(ctrl
);
403 err(msg_initialization_err
, rc
);
404 goto err_out_free_ctrl_bus
;
406 first_device_num
= ctrl
->slot_device_offset
;
407 num_ctlr_slots
= ctrl
->num_slots
;
409 ctrl
->add_support
= 1;
411 /* Setup the slot information structures */
412 rc
= init_slots(ctrl
);
414 err(msg_initialization_err
, 6);
415 goto err_out_free_ctrl_slot
;
418 /* Now hpc_functions (slot->hpc_ops->functions) are ready */
419 t_slot
= shpchp_find_slot(ctrl
, first_device_num
);
421 /* Check for operation bus speed */
422 rc
= t_slot
->hpc_ops
->get_cur_bus_speed(t_slot
, &ctrl
->speed
);
423 dbg("%s: t_slot->hp_slot %x\n", __FUNCTION__
,t_slot
->hp_slot
);
425 if (rc
|| ctrl
->speed
== PCI_SPEED_UNKNOWN
) {
426 err(SHPC_MODULE_NAME
": Can't get current bus speed. Set to 33MHz PCI.\n");
427 ctrl
->speed
= PCI_SPEED_33MHz
;
430 /* Finish setting up the hot plug ctrl device */
431 ctrl
->next_event
= 0;
433 if (!shpchp_ctrl_list
) {
434 shpchp_ctrl_list
= ctrl
;
437 ctrl
->next
= shpchp_ctrl_list
;
438 shpchp_ctrl_list
= ctrl
;
441 shpchp_create_ctrl_files(ctrl
);
445 err_out_free_ctrl_slot
:
447 err_out_free_ctrl_bus
:
448 kfree(ctrl
->pci_bus
);
449 err_out_unmap_mmio_region
:
450 ctrl
->hpc_ops
->release_ctlr(ctrl
);
458 static int shpc_start_thread(void)
462 dbg("Initialize + Start the notification/polling mechanism \n");
464 retval
= shpchp_event_start_thread();
466 dbg("shpchp_event_start_thread() failed\n");
473 static void __exit
unload_shpchpd(void)
475 struct controller
*ctrl
;
476 struct controller
*tctrl
;
478 ctrl
= shpchp_ctrl_list
;
481 shpchp_remove_ctrl_files(ctrl
);
484 kfree (ctrl
->pci_bus
);
485 ctrl
->hpc_ops
->release_ctlr(ctrl
);
493 /* Stop the notification mechanism */
494 shpchp_event_stop_thread();
499 static struct pci_device_id shpcd_pci_tbl
[] = {
501 .class = ((PCI_CLASS_BRIDGE_PCI
<< 8) | 0x00),
503 .vendor
= PCI_ANY_ID
,
504 .device
= PCI_ANY_ID
,
505 .subvendor
= PCI_ANY_ID
,
506 .subdevice
= PCI_ANY_ID
,
509 { /* end: all zeroes */ }
512 MODULE_DEVICE_TABLE(pci
, shpcd_pci_tbl
);
516 static struct pci_driver shpc_driver
= {
517 .name
= SHPC_MODULE_NAME
,
518 .id_table
= shpcd_pci_tbl
,
520 /* remove: shpc_remove_one, */
525 static int __init
shpcd_init(void)
529 #ifdef CONFIG_HOTPLUG_PCI_SHPC_POLL_EVENT_MODE
530 shpchp_poll_mode
= 1;
533 retval
= shpc_start_thread();
537 retval
= pci_register_driver(&shpc_driver
);
538 dbg("%s: pci_register_driver = %d\n", __FUNCTION__
, retval
);
539 info(DRIVER_DESC
" version: " DRIVER_VERSION
"\n");
543 shpchp_event_stop_thread();
548 static void __exit
shpcd_cleanup(void)
550 dbg("unload_shpchpd()\n");
553 pci_unregister_driver(&shpc_driver
);
555 info(DRIVER_DESC
" version: " DRIVER_VERSION
" unloaded\n");
558 module_init(shpcd_init
);
559 module_exit(shpcd_cleanup
);