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1452 lines
35 KiB
1452 lines
35 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* ds.c -- 16-bit PCMCIA core support |
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* |
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* The initial developer of the original code is David A. Hinds |
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* <[email protected]>. Portions created by David A. Hinds |
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* are Copyright (C) 1999 David A. Hinds. All Rights Reserved. |
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* |
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* (C) 1999 David A. Hinds |
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* (C) 2003 - 2010 Dominik Brodowski |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/errno.h> |
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#include <linux/list.h> |
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#include <linux/delay.h> |
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#include <linux/workqueue.h> |
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#include <linux/crc32.h> |
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#include <linux/firmware.h> |
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#include <linux/kref.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/slab.h> |
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|
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#include <pcmcia/cistpl.h> |
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#include <pcmcia/ds.h> |
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#include <pcmcia/ss.h> |
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|
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#include "cs_internal.h" |
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|
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/*====================================================================*/ |
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|
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/* Module parameters */ |
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|
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MODULE_AUTHOR("David Hinds <[email protected]>"); |
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MODULE_DESCRIPTION("PCMCIA Driver Services"); |
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MODULE_LICENSE("GPL"); |
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|
|
|
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/*====================================================================*/ |
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|
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static void pcmcia_check_driver(struct pcmcia_driver *p_drv) |
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{ |
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const struct pcmcia_device_id *did = p_drv->id_table; |
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unsigned int i; |
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u32 hash; |
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|
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if (!p_drv->probe || !p_drv->remove) |
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printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback " |
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"function\n", p_drv->name); |
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|
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while (did && did->match_flags) { |
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for (i = 0; i < 4; i++) { |
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if (!did->prod_id[i]) |
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continue; |
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|
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hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i])); |
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if (hash == did->prod_id_hash[i]) |
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continue; |
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|
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printk(KERN_DEBUG "pcmcia: %s: invalid hash for " |
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"product string \"%s\": is 0x%x, should " |
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"be 0x%x\n", p_drv->name, did->prod_id[i], |
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did->prod_id_hash[i], hash); |
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printk(KERN_DEBUG "pcmcia: see " |
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"Documentation/pcmcia/devicetable.rst for " |
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"details\n"); |
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} |
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did++; |
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} |
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|
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return; |
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} |
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|
|
|
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/*======================================================================*/ |
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|
|
|
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struct pcmcia_dynid { |
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struct list_head node; |
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struct pcmcia_device_id id; |
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}; |
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|
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/** |
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* new_id_store() - add a new PCMCIA device ID to this driver and re-probe devices |
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* @driver: target device driver |
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* @buf: buffer for scanning device ID data |
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* @count: input size |
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* |
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* Adds a new dynamic PCMCIA device ID to this driver, |
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* and causes the driver to probe for all devices again. |
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*/ |
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static ssize_t |
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new_id_store(struct device_driver *driver, const char *buf, size_t count) |
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{ |
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struct pcmcia_dynid *dynid; |
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struct pcmcia_driver *pdrv = to_pcmcia_drv(driver); |
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__u16 match_flags, manf_id, card_id; |
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__u8 func_id, function, device_no; |
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__u32 prod_id_hash[4] = {0, 0, 0, 0}; |
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int fields = 0; |
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int retval = 0; |
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|
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fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x", |
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&match_flags, &manf_id, &card_id, &func_id, &function, &device_no, |
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&prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]); |
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if (fields < 6) |
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return -EINVAL; |
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|
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dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL); |
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if (!dynid) |
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return -ENOMEM; |
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|
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dynid->id.match_flags = match_flags; |
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dynid->id.manf_id = manf_id; |
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dynid->id.card_id = card_id; |
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dynid->id.func_id = func_id; |
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dynid->id.function = function; |
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dynid->id.device_no = device_no; |
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memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4); |
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|
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mutex_lock(&pdrv->dynids.lock); |
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list_add_tail(&dynid->node, &pdrv->dynids.list); |
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mutex_unlock(&pdrv->dynids.lock); |
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|
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retval = driver_attach(&pdrv->drv); |
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|
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if (retval) |
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return retval; |
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return count; |
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} |
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static DRIVER_ATTR_WO(new_id); |
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|
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static void |
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pcmcia_free_dynids(struct pcmcia_driver *drv) |
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{ |
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struct pcmcia_dynid *dynid, *n; |
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|
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mutex_lock(&drv->dynids.lock); |
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list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { |
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list_del(&dynid->node); |
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kfree(dynid); |
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} |
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mutex_unlock(&drv->dynids.lock); |
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} |
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|
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static int |
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pcmcia_create_newid_file(struct pcmcia_driver *drv) |
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{ |
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int error = 0; |
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if (drv->probe != NULL) |
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error = driver_create_file(&drv->drv, &driver_attr_new_id); |
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return error; |
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} |
|
|
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static void |
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pcmcia_remove_newid_file(struct pcmcia_driver *drv) |
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{ |
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driver_remove_file(&drv->drv, &driver_attr_new_id); |
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} |
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|
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/** |
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* pcmcia_register_driver - register a PCMCIA driver with the bus core |
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* @driver: the &driver being registered |
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* |
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* Registers a PCMCIA driver with the PCMCIA bus core. |
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*/ |
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int pcmcia_register_driver(struct pcmcia_driver *driver) |
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{ |
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int error; |
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|
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if (!driver) |
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return -EINVAL; |
|
|
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pcmcia_check_driver(driver); |
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|
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/* initialize common fields */ |
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driver->drv.bus = &pcmcia_bus_type; |
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driver->drv.owner = driver->owner; |
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driver->drv.name = driver->name; |
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mutex_init(&driver->dynids.lock); |
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INIT_LIST_HEAD(&driver->dynids.list); |
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|
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pr_debug("registering driver %s\n", driver->name); |
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|
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error = driver_register(&driver->drv); |
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if (error < 0) |
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return error; |
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|
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error = pcmcia_create_newid_file(driver); |
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if (error) |
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driver_unregister(&driver->drv); |
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|
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return error; |
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} |
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EXPORT_SYMBOL(pcmcia_register_driver); |
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|
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/** |
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* pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core |
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* @driver: the &driver being unregistered |
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*/ |
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void pcmcia_unregister_driver(struct pcmcia_driver *driver) |
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{ |
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pr_debug("unregistering driver %s\n", driver->name); |
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pcmcia_remove_newid_file(driver); |
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driver_unregister(&driver->drv); |
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pcmcia_free_dynids(driver); |
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} |
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EXPORT_SYMBOL(pcmcia_unregister_driver); |
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|
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|
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/* pcmcia_device handling */ |
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|
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static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev) |
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{ |
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struct device *tmp_dev; |
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tmp_dev = get_device(&p_dev->dev); |
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if (!tmp_dev) |
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return NULL; |
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return to_pcmcia_dev(tmp_dev); |
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} |
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|
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static void pcmcia_put_dev(struct pcmcia_device *p_dev) |
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{ |
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if (p_dev) |
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put_device(&p_dev->dev); |
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} |
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|
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static void pcmcia_release_function(struct kref *ref) |
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{ |
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struct config_t *c = container_of(ref, struct config_t, ref); |
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pr_debug("releasing config_t\n"); |
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kfree(c); |
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} |
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|
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static void pcmcia_release_dev(struct device *dev) |
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{ |
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struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
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int i; |
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dev_dbg(dev, "releasing device\n"); |
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pcmcia_put_socket(p_dev->socket); |
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for (i = 0; i < 4; i++) |
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kfree(p_dev->prod_id[i]); |
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kfree(p_dev->devname); |
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kref_put(&p_dev->function_config->ref, pcmcia_release_function); |
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kfree(p_dev); |
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} |
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|
|
|
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static int pcmcia_device_probe(struct device *dev) |
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{ |
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struct pcmcia_device *p_dev; |
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struct pcmcia_driver *p_drv; |
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struct pcmcia_socket *s; |
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cistpl_config_t cis_config; |
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int ret = 0; |
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|
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dev = get_device(dev); |
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if (!dev) |
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return -ENODEV; |
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|
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p_dev = to_pcmcia_dev(dev); |
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p_drv = to_pcmcia_drv(dev->driver); |
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s = p_dev->socket; |
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|
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dev_dbg(dev, "trying to bind to %s\n", p_drv->name); |
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|
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if ((!p_drv->probe) || (!p_dev->function_config) || |
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(!try_module_get(p_drv->owner))) { |
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ret = -EINVAL; |
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goto put_dev; |
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} |
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|
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/* set up some more device information */ |
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ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG, |
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&cis_config); |
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if (!ret) { |
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p_dev->config_base = cis_config.base; |
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p_dev->config_regs = cis_config.rmask[0]; |
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dev_dbg(dev, "base %x, regs %x", p_dev->config_base, |
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p_dev->config_regs); |
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} else { |
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dev_info(dev, |
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"pcmcia: could not parse base and rmask0 of CIS\n"); |
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p_dev->config_base = 0; |
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p_dev->config_regs = 0; |
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} |
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|
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ret = p_drv->probe(p_dev); |
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if (ret) { |
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dev_dbg(dev, "binding to %s failed with %d\n", |
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p_drv->name, ret); |
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goto put_module; |
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} |
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dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name, |
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p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq); |
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dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR", |
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p_dev->resource[0], p_dev->resource[1], p_dev->resource[2], |
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p_dev->resource[3], p_dev->resource[4]); |
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|
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mutex_lock(&s->ops_mutex); |
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if ((s->pcmcia_pfc) && |
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(p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) |
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pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); |
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mutex_unlock(&s->ops_mutex); |
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|
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put_module: |
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if (ret) |
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module_put(p_drv->owner); |
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put_dev: |
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if (ret) |
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put_device(dev); |
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return ret; |
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} |
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|
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/* |
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* Removes a PCMCIA card from the device tree and socket list. |
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*/ |
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static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) |
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{ |
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struct pcmcia_device *p_dev; |
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struct pcmcia_device *tmp; |
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|
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dev_dbg(leftover ? &leftover->dev : &s->dev, |
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"pcmcia_card_remove(%d) %s\n", s->sock, |
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leftover ? leftover->devname : ""); |
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|
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mutex_lock(&s->ops_mutex); |
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if (!leftover) |
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s->device_count = 0; |
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else |
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s->device_count = 1; |
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mutex_unlock(&s->ops_mutex); |
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|
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/* unregister all pcmcia_devices registered with this socket, except leftover */ |
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list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { |
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if (p_dev == leftover) |
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continue; |
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|
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mutex_lock(&s->ops_mutex); |
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list_del(&p_dev->socket_device_list); |
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mutex_unlock(&s->ops_mutex); |
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|
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dev_dbg(&p_dev->dev, "unregistering device\n"); |
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device_unregister(&p_dev->dev); |
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} |
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|
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return; |
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} |
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|
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static void pcmcia_device_remove(struct device *dev) |
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{ |
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struct pcmcia_device *p_dev; |
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struct pcmcia_driver *p_drv; |
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int i; |
|
|
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p_dev = to_pcmcia_dev(dev); |
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p_drv = to_pcmcia_drv(dev->driver); |
|
|
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dev_dbg(dev, "removing device\n"); |
|
|
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/* If we're removing the primary module driving a |
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* pseudo multi-function card, we need to unbind |
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* all devices |
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*/ |
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if ((p_dev->socket->pcmcia_pfc) && |
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(p_dev->socket->device_count > 0) && |
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(p_dev->device_no == 0)) |
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pcmcia_card_remove(p_dev->socket, p_dev); |
|
|
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/* detach the "instance" */ |
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if (p_drv->remove) |
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p_drv->remove(p_dev); |
|
|
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/* check for proper unloading */ |
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if (p_dev->_irq || p_dev->_io || p_dev->_locked) |
|
dev_info(dev, |
|
"pcmcia: driver %s did not release config properly\n", |
|
p_drv->name); |
|
|
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for (i = 0; i < MAX_WIN; i++) |
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if (p_dev->_win & CLIENT_WIN_REQ(i)) |
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dev_info(dev, |
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"pcmcia: driver %s did not release window properly\n", |
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p_drv->name); |
|
|
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/* references from pcmcia_device_probe */ |
|
pcmcia_put_dev(p_dev); |
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module_put(p_drv->owner); |
|
} |
|
|
|
|
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/* |
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* pcmcia_device_query -- determine information about a pcmcia device |
|
*/ |
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static int pcmcia_device_query(struct pcmcia_device *p_dev) |
|
{ |
|
cistpl_manfid_t manf_id; |
|
cistpl_funcid_t func_id; |
|
cistpl_vers_1_t *vers1; |
|
unsigned int i; |
|
|
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vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); |
|
if (!vers1) |
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return -ENOMEM; |
|
|
|
if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, |
|
CISTPL_MANFID, &manf_id)) { |
|
mutex_lock(&p_dev->socket->ops_mutex); |
|
p_dev->manf_id = manf_id.manf; |
|
p_dev->card_id = manf_id.card; |
|
p_dev->has_manf_id = 1; |
|
p_dev->has_card_id = 1; |
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mutex_unlock(&p_dev->socket->ops_mutex); |
|
} |
|
|
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if (!pccard_read_tuple(p_dev->socket, p_dev->func, |
|
CISTPL_FUNCID, &func_id)) { |
|
mutex_lock(&p_dev->socket->ops_mutex); |
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p_dev->func_id = func_id.func; |
|
p_dev->has_func_id = 1; |
|
mutex_unlock(&p_dev->socket->ops_mutex); |
|
} else { |
|
/* rule of thumb: cards with no FUNCID, but with |
|
* common memory device geometry information, are |
|
* probably memory cards (from pcmcia-cs) */ |
|
cistpl_device_geo_t *devgeo; |
|
|
|
devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL); |
|
if (!devgeo) { |
|
kfree(vers1); |
|
return -ENOMEM; |
|
} |
|
if (!pccard_read_tuple(p_dev->socket, p_dev->func, |
|
CISTPL_DEVICE_GEO, devgeo)) { |
|
dev_dbg(&p_dev->dev, |
|
"mem device geometry probably means " |
|
"FUNCID_MEMORY\n"); |
|
mutex_lock(&p_dev->socket->ops_mutex); |
|
p_dev->func_id = CISTPL_FUNCID_MEMORY; |
|
p_dev->has_func_id = 1; |
|
mutex_unlock(&p_dev->socket->ops_mutex); |
|
} |
|
kfree(devgeo); |
|
} |
|
|
|
if (!pccard_read_tuple(p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1, |
|
vers1)) { |
|
mutex_lock(&p_dev->socket->ops_mutex); |
|
for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) { |
|
char *tmp; |
|
unsigned int length; |
|
char *new; |
|
|
|
tmp = vers1->str + vers1->ofs[i]; |
|
|
|
length = strlen(tmp) + 1; |
|
if ((length < 2) || (length > 255)) |
|
continue; |
|
|
|
new = kstrdup(tmp, GFP_KERNEL); |
|
if (!new) |
|
continue; |
|
|
|
tmp = p_dev->prod_id[i]; |
|
p_dev->prod_id[i] = new; |
|
kfree(tmp); |
|
} |
|
mutex_unlock(&p_dev->socket->ops_mutex); |
|
} |
|
|
|
kfree(vers1); |
|
return 0; |
|
} |
|
|
|
|
|
static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, |
|
unsigned int function) |
|
{ |
|
struct pcmcia_device *p_dev, *tmp_dev; |
|
int i; |
|
|
|
s = pcmcia_get_socket(s); |
|
if (!s) |
|
return NULL; |
|
|
|
pr_debug("adding device to %d, function %d\n", s->sock, function); |
|
|
|
p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); |
|
if (!p_dev) |
|
goto err_put; |
|
|
|
mutex_lock(&s->ops_mutex); |
|
p_dev->device_no = (s->device_count++); |
|
mutex_unlock(&s->ops_mutex); |
|
|
|
/* max of 2 PFC devices */ |
|
if ((p_dev->device_no >= 2) && (function == 0)) |
|
goto err_free; |
|
|
|
/* max of 4 devices overall */ |
|
if (p_dev->device_no >= 4) |
|
goto err_free; |
|
|
|
p_dev->socket = s; |
|
p_dev->func = function; |
|
|
|
p_dev->dev.bus = &pcmcia_bus_type; |
|
p_dev->dev.parent = s->dev.parent; |
|
p_dev->dev.release = pcmcia_release_dev; |
|
/* by default don't allow DMA */ |
|
p_dev->dma_mask = 0; |
|
p_dev->dev.dma_mask = &p_dev->dma_mask; |
|
dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no); |
|
if (!dev_name(&p_dev->dev)) |
|
goto err_free; |
|
p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev)); |
|
if (!p_dev->devname) |
|
goto err_free; |
|
dev_dbg(&p_dev->dev, "devname is %s\n", p_dev->devname); |
|
|
|
mutex_lock(&s->ops_mutex); |
|
|
|
/* |
|
* p_dev->function_config must be the same for all card functions. |
|
* Note that this is serialized by ops_mutex, so that only one |
|
* such struct will be created. |
|
*/ |
|
list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) |
|
if (p_dev->func == tmp_dev->func) { |
|
p_dev->function_config = tmp_dev->function_config; |
|
p_dev->irq = tmp_dev->irq; |
|
kref_get(&p_dev->function_config->ref); |
|
} |
|
|
|
/* Add to the list in pcmcia_bus_socket */ |
|
list_add(&p_dev->socket_device_list, &s->devices_list); |
|
|
|
if (pcmcia_setup_irq(p_dev)) |
|
dev_warn(&p_dev->dev, |
|
"IRQ setup failed -- device might not work\n"); |
|
|
|
if (!p_dev->function_config) { |
|
config_t *c; |
|
dev_dbg(&p_dev->dev, "creating config_t\n"); |
|
c = kzalloc(sizeof(struct config_t), GFP_KERNEL); |
|
if (!c) { |
|
mutex_unlock(&s->ops_mutex); |
|
goto err_unreg; |
|
} |
|
p_dev->function_config = c; |
|
kref_init(&c->ref); |
|
for (i = 0; i < MAX_IO_WIN; i++) { |
|
c->io[i].name = p_dev->devname; |
|
c->io[i].flags = IORESOURCE_IO; |
|
} |
|
for (i = 0; i < MAX_WIN; i++) { |
|
c->mem[i].name = p_dev->devname; |
|
c->mem[i].flags = IORESOURCE_MEM; |
|
} |
|
} |
|
for (i = 0; i < MAX_IO_WIN; i++) |
|
p_dev->resource[i] = &p_dev->function_config->io[i]; |
|
for (; i < (MAX_IO_WIN + MAX_WIN); i++) |
|
p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN]; |
|
|
|
mutex_unlock(&s->ops_mutex); |
|
|
|
dev_notice(&p_dev->dev, "pcmcia: registering new device %s (IRQ: %d)\n", |
|
p_dev->devname, p_dev->irq); |
|
|
|
pcmcia_device_query(p_dev); |
|
|
|
if (device_register(&p_dev->dev)) |
|
goto err_unreg; |
|
|
|
return p_dev; |
|
|
|
err_unreg: |
|
mutex_lock(&s->ops_mutex); |
|
list_del(&p_dev->socket_device_list); |
|
mutex_unlock(&s->ops_mutex); |
|
|
|
err_free: |
|
mutex_lock(&s->ops_mutex); |
|
s->device_count--; |
|
mutex_unlock(&s->ops_mutex); |
|
|
|
for (i = 0; i < 4; i++) |
|
kfree(p_dev->prod_id[i]); |
|
kfree(p_dev->devname); |
|
kfree(p_dev); |
|
err_put: |
|
pcmcia_put_socket(s); |
|
|
|
return NULL; |
|
} |
|
|
|
|
|
static int pcmcia_card_add(struct pcmcia_socket *s) |
|
{ |
|
cistpl_longlink_mfc_t mfc; |
|
unsigned int no_funcs, i, no_chains; |
|
int ret = -EAGAIN; |
|
|
|
mutex_lock(&s->ops_mutex); |
|
if (!(s->resource_setup_done)) { |
|
dev_dbg(&s->dev, |
|
"no resources available, delaying card_add\n"); |
|
mutex_unlock(&s->ops_mutex); |
|
return -EAGAIN; /* try again, but later... */ |
|
} |
|
|
|
if (pcmcia_validate_mem(s)) { |
|
dev_dbg(&s->dev, "validating mem resources failed, " |
|
"delaying card_add\n"); |
|
mutex_unlock(&s->ops_mutex); |
|
return -EAGAIN; /* try again, but later... */ |
|
} |
|
mutex_unlock(&s->ops_mutex); |
|
|
|
ret = pccard_validate_cis(s, &no_chains); |
|
if (ret || !no_chains) { |
|
#if defined(CONFIG_MTD_PCMCIA_ANONYMOUS) |
|
/* Set up as an anonymous card. If we don't have anonymous |
|
memory support then just error the card as there is no |
|
point trying to second guess. |
|
|
|
Note: some cards have just a device entry, it may be |
|
worth extending support to cover these in future */ |
|
if (ret == -EIO) { |
|
dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n"); |
|
pcmcia_replace_cis(s, "\xFF", 1); |
|
no_chains = 1; |
|
ret = 0; |
|
} else |
|
#endif |
|
{ |
|
dev_dbg(&s->dev, "invalid CIS or invalid resources\n"); |
|
return -ENODEV; |
|
} |
|
} |
|
|
|
if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) |
|
no_funcs = mfc.nfn; |
|
else |
|
no_funcs = 1; |
|
s->functions = no_funcs; |
|
|
|
for (i = 0; i < no_funcs; i++) |
|
pcmcia_device_add(s, i); |
|
|
|
return ret; |
|
} |
|
|
|
|
|
static int pcmcia_requery_callback(struct device *dev, void *_data) |
|
{ |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
|
if (!p_dev->dev.driver) { |
|
dev_dbg(dev, "update device information\n"); |
|
pcmcia_device_query(p_dev); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
|
|
static void pcmcia_requery(struct pcmcia_socket *s) |
|
{ |
|
int has_pfc; |
|
|
|
if (!(s->state & SOCKET_PRESENT)) |
|
return; |
|
|
|
if (s->functions == 0) { |
|
pcmcia_card_add(s); |
|
return; |
|
} |
|
|
|
/* some device information might have changed because of a CIS |
|
* update or because we can finally read it correctly... so |
|
* determine it again, overwriting old values if necessary. */ |
|
bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery_callback); |
|
|
|
/* if the CIS changed, we need to check whether the number of |
|
* functions changed. */ |
|
if (s->fake_cis) { |
|
int old_funcs, new_funcs; |
|
cistpl_longlink_mfc_t mfc; |
|
|
|
/* does this cis override add or remove functions? */ |
|
old_funcs = s->functions; |
|
|
|
if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, |
|
&mfc)) |
|
new_funcs = mfc.nfn; |
|
else |
|
new_funcs = 1; |
|
if (old_funcs != new_funcs) { |
|
/* we need to re-start */ |
|
pcmcia_card_remove(s, NULL); |
|
s->functions = 0; |
|
pcmcia_card_add(s); |
|
} |
|
} |
|
|
|
/* If the PCMCIA device consists of two pseudo devices, |
|
* call pcmcia_device_add() -- which will fail if both |
|
* devices are already registered. */ |
|
mutex_lock(&s->ops_mutex); |
|
has_pfc = s->pcmcia_pfc; |
|
mutex_unlock(&s->ops_mutex); |
|
if (has_pfc) |
|
pcmcia_device_add(s, 0); |
|
|
|
/* we re-scan all devices, not just the ones connected to this |
|
* socket. This does not matter, though. */ |
|
if (bus_rescan_devices(&pcmcia_bus_type)) |
|
dev_warn(&s->dev, "rescanning the bus failed\n"); |
|
} |
|
|
|
|
|
#ifdef CONFIG_PCMCIA_LOAD_CIS |
|
|
|
/** |
|
* pcmcia_load_firmware - load CIS from userspace if device-provided is broken |
|
* @dev: the pcmcia device which needs a CIS override |
|
* @filename: requested filename in /lib/firmware/ |
|
* |
|
* This uses the in-kernel firmware loading mechanism to use a "fake CIS" if |
|
* the one provided by the card is broken. The firmware files reside in |
|
* /lib/firmware/ in userspace. |
|
*/ |
|
static int pcmcia_load_firmware(struct pcmcia_device *dev, char *filename) |
|
{ |
|
struct pcmcia_socket *s = dev->socket; |
|
const struct firmware *fw; |
|
int ret = -ENOMEM; |
|
cistpl_longlink_mfc_t mfc; |
|
int old_funcs, new_funcs = 1; |
|
|
|
if (!filename) |
|
return -EINVAL; |
|
|
|
dev_dbg(&dev->dev, "trying to load CIS file %s\n", filename); |
|
|
|
if (request_firmware(&fw, filename, &dev->dev) == 0) { |
|
if (fw->size >= CISTPL_MAX_CIS_SIZE) { |
|
ret = -EINVAL; |
|
dev_err(&dev->dev, "pcmcia: CIS override is too big\n"); |
|
goto release; |
|
} |
|
|
|
if (!pcmcia_replace_cis(s, fw->data, fw->size)) |
|
ret = 0; |
|
else { |
|
dev_err(&dev->dev, "pcmcia: CIS override failed\n"); |
|
goto release; |
|
} |
|
|
|
/* we need to re-start if the number of functions changed */ |
|
old_funcs = s->functions; |
|
if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, |
|
&mfc)) |
|
new_funcs = mfc.nfn; |
|
|
|
if (old_funcs != new_funcs) |
|
ret = -EBUSY; |
|
|
|
/* update information */ |
|
pcmcia_device_query(dev); |
|
|
|
/* requery (as number of functions might have changed) */ |
|
pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); |
|
} |
|
release: |
|
release_firmware(fw); |
|
|
|
return ret; |
|
} |
|
|
|
#else /* !CONFIG_PCMCIA_LOAD_CIS */ |
|
|
|
static inline int pcmcia_load_firmware(struct pcmcia_device *dev, |
|
char *filename) |
|
{ |
|
return -ENODEV; |
|
} |
|
|
|
#endif |
|
|
|
|
|
static inline int pcmcia_devmatch(struct pcmcia_device *dev, |
|
const struct pcmcia_device_id *did) |
|
{ |
|
if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { |
|
if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) |
|
return 0; |
|
} |
|
|
|
if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { |
|
if ((!dev->has_card_id) || (dev->card_id != did->card_id)) |
|
return 0; |
|
} |
|
|
|
if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { |
|
if (dev->func != did->function) |
|
return 0; |
|
} |
|
|
|
if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { |
|
if (!dev->prod_id[0]) |
|
return 0; |
|
if (strcmp(did->prod_id[0], dev->prod_id[0])) |
|
return 0; |
|
} |
|
|
|
if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { |
|
if (!dev->prod_id[1]) |
|
return 0; |
|
if (strcmp(did->prod_id[1], dev->prod_id[1])) |
|
return 0; |
|
} |
|
|
|
if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { |
|
if (!dev->prod_id[2]) |
|
return 0; |
|
if (strcmp(did->prod_id[2], dev->prod_id[2])) |
|
return 0; |
|
} |
|
|
|
if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { |
|
if (!dev->prod_id[3]) |
|
return 0; |
|
if (strcmp(did->prod_id[3], dev->prod_id[3])) |
|
return 0; |
|
} |
|
|
|
if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { |
|
dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n"); |
|
mutex_lock(&dev->socket->ops_mutex); |
|
dev->socket->pcmcia_pfc = 1; |
|
mutex_unlock(&dev->socket->ops_mutex); |
|
if (dev->device_no != did->device_no) |
|
return 0; |
|
} |
|
|
|
if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { |
|
int ret; |
|
|
|
if ((!dev->has_func_id) || (dev->func_id != did->func_id)) |
|
return 0; |
|
|
|
/* if this is a pseudo-multi-function device, |
|
* we need explicit matches */ |
|
if (dev->socket->pcmcia_pfc) |
|
return 0; |
|
if (dev->device_no) |
|
return 0; |
|
|
|
/* also, FUNC_ID matching needs to be activated by userspace |
|
* after it has re-checked that there is no possible module |
|
* with a prod_id/manf_id/card_id match. |
|
*/ |
|
mutex_lock(&dev->socket->ops_mutex); |
|
ret = dev->allow_func_id_match; |
|
mutex_unlock(&dev->socket->ops_mutex); |
|
|
|
if (!ret) { |
|
dev_dbg(&dev->dev, |
|
"skipping FUNC_ID match until userspace ACK\n"); |
|
return 0; |
|
} |
|
} |
|
|
|
if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { |
|
dev_dbg(&dev->dev, "device needs a fake CIS\n"); |
|
if (!dev->socket->fake_cis) |
|
if (pcmcia_load_firmware(dev, did->cisfile)) |
|
return 0; |
|
} |
|
|
|
if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { |
|
int i; |
|
for (i = 0; i < 4; i++) |
|
if (dev->prod_id[i]) |
|
return 0; |
|
if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) |
|
return 0; |
|
} |
|
|
|
return 1; |
|
} |
|
|
|
|
|
static int pcmcia_bus_match(struct device *dev, struct device_driver *drv) |
|
{ |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
|
struct pcmcia_driver *p_drv = to_pcmcia_drv(drv); |
|
const struct pcmcia_device_id *did = p_drv->id_table; |
|
struct pcmcia_dynid *dynid; |
|
|
|
/* match dynamic devices first */ |
|
mutex_lock(&p_drv->dynids.lock); |
|
list_for_each_entry(dynid, &p_drv->dynids.list, node) { |
|
dev_dbg(dev, "trying to match to %s\n", drv->name); |
|
if (pcmcia_devmatch(p_dev, &dynid->id)) { |
|
dev_dbg(dev, "matched to %s\n", drv->name); |
|
mutex_unlock(&p_drv->dynids.lock); |
|
return 1; |
|
} |
|
} |
|
mutex_unlock(&p_drv->dynids.lock); |
|
|
|
while (did && did->match_flags) { |
|
dev_dbg(dev, "trying to match to %s\n", drv->name); |
|
if (pcmcia_devmatch(p_dev, did)) { |
|
dev_dbg(dev, "matched to %s\n", drv->name); |
|
return 1; |
|
} |
|
did++; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
|
{ |
|
struct pcmcia_device *p_dev; |
|
int i; |
|
u32 hash[4] = { 0, 0, 0, 0}; |
|
|
|
if (!dev) |
|
return -ENODEV; |
|
|
|
p_dev = to_pcmcia_dev(dev); |
|
|
|
/* calculate hashes */ |
|
for (i = 0; i < 4; i++) { |
|
if (!p_dev->prod_id[i]) |
|
continue; |
|
hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); |
|
} |
|
|
|
if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock)) |
|
return -ENOMEM; |
|
|
|
if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no)) |
|
return -ENOMEM; |
|
|
|
if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" |
|
"pa%08Xpb%08Xpc%08Xpd%08X", |
|
p_dev->has_manf_id ? p_dev->manf_id : 0, |
|
p_dev->has_card_id ? p_dev->card_id : 0, |
|
p_dev->has_func_id ? p_dev->func_id : 0, |
|
p_dev->func, |
|
p_dev->device_no, |
|
hash[0], |
|
hash[1], |
|
hash[2], |
|
hash[3])) |
|
return -ENOMEM; |
|
|
|
return 0; |
|
} |
|
|
|
/************************ runtime PM support ***************************/ |
|
|
|
static int pcmcia_dev_suspend(struct device *dev); |
|
static int pcmcia_dev_resume(struct device *dev); |
|
|
|
static int runtime_suspend(struct device *dev) |
|
{ |
|
int rc; |
|
|
|
device_lock(dev); |
|
rc = pcmcia_dev_suspend(dev); |
|
device_unlock(dev); |
|
return rc; |
|
} |
|
|
|
static int runtime_resume(struct device *dev) |
|
{ |
|
int rc; |
|
|
|
device_lock(dev); |
|
rc = pcmcia_dev_resume(dev); |
|
device_unlock(dev); |
|
return rc; |
|
} |
|
|
|
/************************ per-device sysfs output ***************************/ |
|
|
|
#define pcmcia_device_attr(field, test, format) \ |
|
static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ |
|
{ \ |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ |
|
return p_dev->test ? sprintf(buf, format, p_dev->field) : -ENODEV; \ |
|
} \ |
|
static DEVICE_ATTR_RO(field); |
|
|
|
#define pcmcia_device_stringattr(name, field) \ |
|
static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ |
|
{ \ |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ |
|
return p_dev->field ? sprintf(buf, "%s\n", p_dev->field) : -ENODEV; \ |
|
} \ |
|
static DEVICE_ATTR_RO(name); |
|
|
|
pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); |
|
pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); |
|
pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); |
|
pcmcia_device_stringattr(prod_id1, prod_id[0]); |
|
pcmcia_device_stringattr(prod_id2, prod_id[1]); |
|
pcmcia_device_stringattr(prod_id3, prod_id[2]); |
|
pcmcia_device_stringattr(prod_id4, prod_id[3]); |
|
|
|
static ssize_t function_show(struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
|
return p_dev->socket ? sprintf(buf, "0x%02x\n", p_dev->func) : -ENODEV; |
|
} |
|
static DEVICE_ATTR_RO(function); |
|
|
|
static ssize_t resources_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
|
char *str = buf; |
|
int i; |
|
|
|
for (i = 0; i < PCMCIA_NUM_RESOURCES; i++) |
|
str += sprintf(str, "%pr\n", p_dev->resource[i]); |
|
|
|
return str - buf; |
|
} |
|
static DEVICE_ATTR_RO(resources); |
|
|
|
static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf) |
|
{ |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
|
|
|
if (p_dev->suspended) |
|
return sprintf(buf, "off\n"); |
|
else |
|
return sprintf(buf, "on\n"); |
|
} |
|
|
|
static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
|
int ret = 0; |
|
|
|
if (!count) |
|
return -EINVAL; |
|
|
|
if ((!p_dev->suspended) && !strncmp(buf, "off", 3)) |
|
ret = runtime_suspend(dev); |
|
else if (p_dev->suspended && !strncmp(buf, "on", 2)) |
|
ret = runtime_resume(dev); |
|
|
|
return ret ? ret : count; |
|
} |
|
static DEVICE_ATTR_RW(pm_state); |
|
|
|
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
|
{ |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
|
int i; |
|
u32 hash[4] = { 0, 0, 0, 0}; |
|
|
|
/* calculate hashes */ |
|
for (i = 0; i < 4; i++) { |
|
if (!p_dev->prod_id[i]) |
|
continue; |
|
hash[i] = crc32(0, p_dev->prod_id[i], |
|
strlen(p_dev->prod_id[i])); |
|
} |
|
return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" |
|
"pa%08Xpb%08Xpc%08Xpd%08X\n", |
|
p_dev->has_manf_id ? p_dev->manf_id : 0, |
|
p_dev->has_card_id ? p_dev->card_id : 0, |
|
p_dev->has_func_id ? p_dev->func_id : 0, |
|
p_dev->func, p_dev->device_no, |
|
hash[0], hash[1], hash[2], hash[3]); |
|
} |
|
static DEVICE_ATTR_RO(modalias); |
|
|
|
static ssize_t allow_func_id_match_store(struct device *dev, |
|
struct device_attribute *attr, const char *buf, size_t count) |
|
{ |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
|
|
|
if (!count) |
|
return -EINVAL; |
|
|
|
mutex_lock(&p_dev->socket->ops_mutex); |
|
p_dev->allow_func_id_match = 1; |
|
mutex_unlock(&p_dev->socket->ops_mutex); |
|
pcmcia_parse_uevents(p_dev->socket, PCMCIA_UEVENT_REQUERY); |
|
|
|
return count; |
|
} |
|
static DEVICE_ATTR_WO(allow_func_id_match); |
|
|
|
static struct attribute *pcmcia_dev_attrs[] = { |
|
&dev_attr_resources.attr, |
|
&dev_attr_pm_state.attr, |
|
&dev_attr_function.attr, |
|
&dev_attr_func_id.attr, |
|
&dev_attr_manf_id.attr, |
|
&dev_attr_card_id.attr, |
|
&dev_attr_prod_id1.attr, |
|
&dev_attr_prod_id2.attr, |
|
&dev_attr_prod_id3.attr, |
|
&dev_attr_prod_id4.attr, |
|
&dev_attr_modalias.attr, |
|
&dev_attr_allow_func_id_match.attr, |
|
NULL, |
|
}; |
|
ATTRIBUTE_GROUPS(pcmcia_dev); |
|
|
|
/* PM support, also needed for reset */ |
|
|
|
static int pcmcia_dev_suspend(struct device *dev) |
|
{ |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
|
struct pcmcia_driver *p_drv = NULL; |
|
int ret = 0; |
|
|
|
mutex_lock(&p_dev->socket->ops_mutex); |
|
if (p_dev->suspended) { |
|
mutex_unlock(&p_dev->socket->ops_mutex); |
|
return 0; |
|
} |
|
p_dev->suspended = 1; |
|
mutex_unlock(&p_dev->socket->ops_mutex); |
|
|
|
dev_dbg(dev, "suspending\n"); |
|
|
|
if (dev->driver) |
|
p_drv = to_pcmcia_drv(dev->driver); |
|
|
|
if (!p_drv) |
|
goto out; |
|
|
|
if (p_drv->suspend) { |
|
ret = p_drv->suspend(p_dev); |
|
if (ret) { |
|
dev_err(dev, |
|
"pcmcia: device %s (driver %s) did not want to go to sleep (%d)\n", |
|
p_dev->devname, p_drv->name, ret); |
|
mutex_lock(&p_dev->socket->ops_mutex); |
|
p_dev->suspended = 0; |
|
mutex_unlock(&p_dev->socket->ops_mutex); |
|
goto out; |
|
} |
|
} |
|
|
|
if (p_dev->device_no == p_dev->func) { |
|
dev_dbg(dev, "releasing configuration\n"); |
|
pcmcia_release_configuration(p_dev); |
|
} |
|
|
|
out: |
|
return ret; |
|
} |
|
|
|
|
|
static int pcmcia_dev_resume(struct device *dev) |
|
{ |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
|
struct pcmcia_driver *p_drv = NULL; |
|
int ret = 0; |
|
|
|
mutex_lock(&p_dev->socket->ops_mutex); |
|
if (!p_dev->suspended) { |
|
mutex_unlock(&p_dev->socket->ops_mutex); |
|
return 0; |
|
} |
|
p_dev->suspended = 0; |
|
mutex_unlock(&p_dev->socket->ops_mutex); |
|
|
|
dev_dbg(dev, "resuming\n"); |
|
|
|
if (dev->driver) |
|
p_drv = to_pcmcia_drv(dev->driver); |
|
|
|
if (!p_drv) |
|
goto out; |
|
|
|
if (p_dev->device_no == p_dev->func) { |
|
dev_dbg(dev, "requesting configuration\n"); |
|
ret = pcmcia_enable_device(p_dev); |
|
if (ret) |
|
goto out; |
|
} |
|
|
|
if (p_drv->resume) |
|
ret = p_drv->resume(p_dev); |
|
|
|
out: |
|
return ret; |
|
} |
|
|
|
|
|
static int pcmcia_bus_suspend_callback(struct device *dev, void *_data) |
|
{ |
|
struct pcmcia_socket *skt = _data; |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
|
|
|
if (p_dev->socket != skt || p_dev->suspended) |
|
return 0; |
|
|
|
return runtime_suspend(dev); |
|
} |
|
|
|
static int pcmcia_bus_resume_callback(struct device *dev, void *_data) |
|
{ |
|
struct pcmcia_socket *skt = _data; |
|
struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
|
|
|
if (p_dev->socket != skt || !p_dev->suspended) |
|
return 0; |
|
|
|
runtime_resume(dev); |
|
|
|
return 0; |
|
} |
|
|
|
static int pcmcia_bus_resume(struct pcmcia_socket *skt) |
|
{ |
|
dev_dbg(&skt->dev, "resuming socket %d\n", skt->sock); |
|
bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); |
|
return 0; |
|
} |
|
|
|
static int pcmcia_bus_suspend(struct pcmcia_socket *skt) |
|
{ |
|
dev_dbg(&skt->dev, "suspending socket %d\n", skt->sock); |
|
if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, |
|
pcmcia_bus_suspend_callback)) { |
|
pcmcia_bus_resume(skt); |
|
return -EIO; |
|
} |
|
return 0; |
|
} |
|
|
|
static int pcmcia_bus_remove(struct pcmcia_socket *skt) |
|
{ |
|
atomic_set(&skt->present, 0); |
|
pcmcia_card_remove(skt, NULL); |
|
|
|
mutex_lock(&skt->ops_mutex); |
|
destroy_cis_cache(skt); |
|
pcmcia_cleanup_irq(skt); |
|
mutex_unlock(&skt->ops_mutex); |
|
|
|
return 0; |
|
} |
|
|
|
static int pcmcia_bus_add(struct pcmcia_socket *skt) |
|
{ |
|
atomic_set(&skt->present, 1); |
|
|
|
mutex_lock(&skt->ops_mutex); |
|
skt->pcmcia_pfc = 0; |
|
destroy_cis_cache(skt); /* to be on the safe side... */ |
|
mutex_unlock(&skt->ops_mutex); |
|
|
|
pcmcia_card_add(skt); |
|
|
|
return 0; |
|
} |
|
|
|
static int pcmcia_bus_early_resume(struct pcmcia_socket *skt) |
|
{ |
|
if (!verify_cis_cache(skt)) |
|
return 0; |
|
|
|
dev_dbg(&skt->dev, "cis mismatch - different card\n"); |
|
|
|
/* first, remove the card */ |
|
pcmcia_bus_remove(skt); |
|
|
|
mutex_lock(&skt->ops_mutex); |
|
destroy_cis_cache(skt); |
|
kfree(skt->fake_cis); |
|
skt->fake_cis = NULL; |
|
skt->functions = 0; |
|
mutex_unlock(&skt->ops_mutex); |
|
|
|
/* now, add the new card */ |
|
pcmcia_bus_add(skt); |
|
return 0; |
|
} |
|
|
|
|
|
/* |
|
* NOTE: This is racy. There's no guarantee the card will still be |
|
* physically present, even if the call to this function returns |
|
* non-NULL. Furthermore, the device driver most likely is unbound |
|
* almost immediately, so the timeframe where pcmcia_dev_present |
|
* returns NULL is probably really really small. |
|
*/ |
|
struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev) |
|
{ |
|
struct pcmcia_device *p_dev; |
|
struct pcmcia_device *ret = NULL; |
|
|
|
p_dev = pcmcia_get_dev(_p_dev); |
|
if (!p_dev) |
|
return NULL; |
|
|
|
if (atomic_read(&p_dev->socket->present) != 0) |
|
ret = p_dev; |
|
|
|
pcmcia_put_dev(p_dev); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(pcmcia_dev_present); |
|
|
|
|
|
static struct pcmcia_callback pcmcia_bus_callback = { |
|
.owner = THIS_MODULE, |
|
.add = pcmcia_bus_add, |
|
.remove = pcmcia_bus_remove, |
|
.requery = pcmcia_requery, |
|
.validate = pccard_validate_cis, |
|
.suspend = pcmcia_bus_suspend, |
|
.early_resume = pcmcia_bus_early_resume, |
|
.resume = pcmcia_bus_resume, |
|
}; |
|
|
|
static int pcmcia_bus_add_socket(struct device *dev, |
|
struct class_interface *class_intf) |
|
{ |
|
struct pcmcia_socket *socket = dev_get_drvdata(dev); |
|
int ret; |
|
|
|
socket = pcmcia_get_socket(socket); |
|
if (!socket) { |
|
dev_err(dev, "PCMCIA obtaining reference to socket failed\n"); |
|
return -ENODEV; |
|
} |
|
|
|
ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr); |
|
if (ret) { |
|
dev_err(dev, "PCMCIA registration failed\n"); |
|
pcmcia_put_socket(socket); |
|
return ret; |
|
} |
|
|
|
INIT_LIST_HEAD(&socket->devices_list); |
|
socket->pcmcia_pfc = 0; |
|
socket->device_count = 0; |
|
atomic_set(&socket->present, 0); |
|
|
|
ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); |
|
if (ret) { |
|
dev_err(dev, "PCMCIA registration failed\n"); |
|
pcmcia_put_socket(socket); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void pcmcia_bus_remove_socket(struct device *dev, |
|
struct class_interface *class_intf) |
|
{ |
|
struct pcmcia_socket *socket = dev_get_drvdata(dev); |
|
|
|
if (!socket) |
|
return; |
|
|
|
pccard_register_pcmcia(socket, NULL); |
|
|
|
/* unregister any unbound devices */ |
|
mutex_lock(&socket->skt_mutex); |
|
pcmcia_card_remove(socket, NULL); |
|
release_cis_mem(socket); |
|
mutex_unlock(&socket->skt_mutex); |
|
|
|
sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr); |
|
|
|
pcmcia_put_socket(socket); |
|
|
|
return; |
|
} |
|
|
|
|
|
/* the pcmcia_bus_interface is used to handle pcmcia socket devices */ |
|
static struct class_interface pcmcia_bus_interface __refdata = { |
|
.class = &pcmcia_socket_class, |
|
.add_dev = &pcmcia_bus_add_socket, |
|
.remove_dev = &pcmcia_bus_remove_socket, |
|
}; |
|
|
|
static const struct dev_pm_ops pcmcia_bus_pm_ops = { |
|
SET_SYSTEM_SLEEP_PM_OPS(pcmcia_dev_suspend, pcmcia_dev_resume) |
|
}; |
|
|
|
struct bus_type pcmcia_bus_type = { |
|
.name = "pcmcia", |
|
.uevent = pcmcia_bus_uevent, |
|
.match = pcmcia_bus_match, |
|
.dev_groups = pcmcia_dev_groups, |
|
.probe = pcmcia_device_probe, |
|
.remove = pcmcia_device_remove, |
|
.pm = &pcmcia_bus_pm_ops, |
|
}; |
|
|
|
|
|
static int __init init_pcmcia_bus(void) |
|
{ |
|
int ret; |
|
|
|
ret = bus_register(&pcmcia_bus_type); |
|
if (ret < 0) { |
|
printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret); |
|
return ret; |
|
} |
|
ret = class_interface_register(&pcmcia_bus_interface); |
|
if (ret < 0) { |
|
printk(KERN_WARNING |
|
"pcmcia: class_interface_register error: %d\n", ret); |
|
bus_unregister(&pcmcia_bus_type); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that |
|
* pcmcia_socket_class is already registered */ |
|
|
|
|
|
static void __exit exit_pcmcia_bus(void) |
|
{ |
|
class_interface_unregister(&pcmcia_bus_interface); |
|
|
|
bus_unregister(&pcmcia_bus_type); |
|
} |
|
module_exit(exit_pcmcia_bus); |
|
|
|
|
|
MODULE_ALIAS("ds");
|
|
|