/* * ds.c -- 16-bit PCMCIA core support * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * The initial developer of the original code is David A. Hinds * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. * * (C) 1999 David A. Hinds * (C) 2003 - 2006 Dominik Brodowski */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/errno.h> #include <linux/list.h> #include <linux/delay.h> #include <linux/workqueue.h> #include <linux/crc32.h> #include <linux/firmware.h> #include <linux/kref.h> #define IN_CARD_SERVICES #include <pcmcia/cs_types.h> #include <pcmcia/cs.h> #include <pcmcia/cistpl.h> #include <pcmcia/ds.h> #include <pcmcia/ss.h> #include "cs_internal.h" #include "ds_internal.h" /*====================================================================*/ /* Module parameters */ MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); MODULE_DESCRIPTION("PCMCIA Driver Services"); MODULE_LICENSE("GPL"); #ifdef DEBUG int ds_pc_debug; module_param_named(pc_debug, ds_pc_debug, int, 0644); #define ds_dbg(lvl, fmt, arg...) do { \ if (ds_pc_debug > (lvl)) \ printk(KERN_DEBUG "ds: " fmt , ## arg); \ } while (0) #else #define ds_dbg(lvl, fmt, arg...) do { } while (0) #endif spinlock_t pcmcia_dev_list_lock; /*====================================================================*/ /* code which was in cs.c before */ /* String tables for error messages */ typedef struct lookup_t { int key; char *msg; } lookup_t; static const lookup_t error_table[] = { { CS_SUCCESS, "Operation succeeded" }, { CS_BAD_ADAPTER, "Bad adapter" }, { CS_BAD_ATTRIBUTE, "Bad attribute", }, { CS_BAD_BASE, "Bad base address" }, { CS_BAD_EDC, "Bad EDC" }, { CS_BAD_IRQ, "Bad IRQ" }, { CS_BAD_OFFSET, "Bad offset" }, { CS_BAD_PAGE, "Bad page number" }, { CS_READ_FAILURE, "Read failure" }, { CS_BAD_SIZE, "Bad size" }, { CS_BAD_SOCKET, "Bad socket" }, { CS_BAD_TYPE, "Bad type" }, { CS_BAD_VCC, "Bad Vcc" }, { CS_BAD_VPP, "Bad Vpp" }, { CS_BAD_WINDOW, "Bad window" }, { CS_WRITE_FAILURE, "Write failure" }, { CS_NO_CARD, "No card present" }, { CS_UNSUPPORTED_FUNCTION, "Usupported function" }, { CS_UNSUPPORTED_MODE, "Unsupported mode" }, { CS_BAD_SPEED, "Bad speed" }, { CS_BUSY, "Resource busy" }, { CS_GENERAL_FAILURE, "General failure" }, { CS_WRITE_PROTECTED, "Write protected" }, { CS_BAD_ARG_LENGTH, "Bad argument length" }, { CS_BAD_ARGS, "Bad arguments" }, { CS_CONFIGURATION_LOCKED, "Configuration locked" }, { CS_IN_USE, "Resource in use" }, { CS_NO_MORE_ITEMS, "No more items" }, { CS_OUT_OF_RESOURCE, "Out of resource" }, { CS_BAD_HANDLE, "Bad handle" }, { CS_BAD_TUPLE, "Bad CIS tuple" } }; static const lookup_t service_table[] = { { AccessConfigurationRegister, "AccessConfigurationRegister" }, { AddSocketServices, "AddSocketServices" }, { AdjustResourceInfo, "AdjustResourceInfo" }, { CheckEraseQueue, "CheckEraseQueue" }, { CloseMemory, "CloseMemory" }, { DeregisterClient, "DeregisterClient" }, { DeregisterEraseQueue, "DeregisterEraseQueue" }, { GetCardServicesInfo, "GetCardServicesInfo" }, { GetClientInfo, "GetClientInfo" }, { GetConfigurationInfo, "GetConfigurationInfo" }, { GetEventMask, "GetEventMask" }, { GetFirstClient, "GetFirstClient" }, { GetFirstRegion, "GetFirstRegion" }, { GetFirstTuple, "GetFirstTuple" }, { GetNextClient, "GetNextClient" }, { GetNextRegion, "GetNextRegion" }, { GetNextTuple, "GetNextTuple" }, { GetStatus, "GetStatus" }, { GetTupleData, "GetTupleData" }, { MapMemPage, "MapMemPage" }, { ModifyConfiguration, "ModifyConfiguration" }, { ModifyWindow, "ModifyWindow" }, { OpenMemory, "OpenMemory" }, { ParseTuple, "ParseTuple" }, { ReadMemory, "ReadMemory" }, { RegisterClient, "RegisterClient" }, { RegisterEraseQueue, "RegisterEraseQueue" }, { RegisterMTD, "RegisterMTD" }, { ReleaseConfiguration, "ReleaseConfiguration" }, { ReleaseIO, "ReleaseIO" }, { ReleaseIRQ, "ReleaseIRQ" }, { ReleaseWindow, "ReleaseWindow" }, { RequestConfiguration, "RequestConfiguration" }, { RequestIO, "RequestIO" }, { RequestIRQ, "RequestIRQ" }, { RequestSocketMask, "RequestSocketMask" }, { RequestWindow, "RequestWindow" }, { ResetCard, "ResetCard" }, { SetEventMask, "SetEventMask" }, { ValidateCIS, "ValidateCIS" }, { WriteMemory, "WriteMemory" }, { BindDevice, "BindDevice" }, { BindMTD, "BindMTD" }, { ReportError, "ReportError" }, { SuspendCard, "SuspendCard" }, { ResumeCard, "ResumeCard" }, { EjectCard, "EjectCard" }, { InsertCard, "InsertCard" }, { ReplaceCIS, "ReplaceCIS" } }; static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err) { int i; char *serv; if (!p_dev) printk(KERN_NOTICE); else printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id); for (i = 0; i < ARRAY_SIZE(service_table); i++) if (service_table[i].key == err->func) break; if (i < ARRAY_SIZE(service_table)) serv = service_table[i].msg; else serv = "Unknown service number"; for (i = 0; i < ARRAY_SIZE(error_table); i++) if (error_table[i].key == err->retcode) break; if (i < ARRAY_SIZE(error_table)) printk("%s: %s\n", serv, error_table[i].msg); else printk("%s: Unknown error code %#x\n", serv, err->retcode); return CS_SUCCESS; } /* report_error */ /* end of code which was in cs.c before */ /*======================================================================*/ void cs_error(struct pcmcia_device *p_dev, int func, int ret) { error_info_t err = { func, ret }; pcmcia_report_error(p_dev, &err); } EXPORT_SYMBOL(cs_error); static void pcmcia_check_driver(struct pcmcia_driver *p_drv) { struct pcmcia_device_id *did = p_drv->id_table; unsigned int i; u32 hash; if (!p_drv->probe || !p_drv->remove) printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback " "function\n", p_drv->drv.name); while (did && did->match_flags) { for (i=0; i<4; i++) { if (!did->prod_id[i]) continue; hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i])); if (hash == did->prod_id_hash[i]) continue; printk(KERN_DEBUG "pcmcia: %s: invalid hash for " "product string \"%s\": is 0x%x, should " "be 0x%x\n", p_drv->drv.name, did->prod_id[i], did->prod_id_hash[i], hash); printk(KERN_DEBUG "pcmcia: see " "Documentation/pcmcia/devicetable.txt for " "details\n"); } did++; } return; } #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; char path[20]; int ret=-ENOMEM; cisdump_t *cis; if (!filename) return -EINVAL; ds_dbg(1, "trying to load firmware %s\n", filename); if (strlen(filename) > 14) return -EINVAL; snprintf(path, 20, "%s", filename); if (request_firmware(&fw, path, &dev->dev) == 0) { if (fw->size >= CISTPL_MAX_CIS_SIZE) goto release; cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL); if (!cis) goto release; cis->Length = fw->size + 1; memcpy(cis->Data, fw->data, fw->size); if (!pcmcia_replace_cis(s, cis)) ret = 0; } 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 /*======================================================================*/ /** * pcmcia_register_driver - register a PCMCIA driver with the bus core * * Registers a PCMCIA driver with the PCMCIA bus core. */ int pcmcia_register_driver(struct pcmcia_driver *driver) { if (!driver) return -EINVAL; pcmcia_check_driver(driver); /* initialize common fields */ driver->drv.bus = &pcmcia_bus_type; driver->drv.owner = driver->owner; return driver_register(&driver->drv); } EXPORT_SYMBOL(pcmcia_register_driver); /** * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core */ void pcmcia_unregister_driver(struct pcmcia_driver *driver) { driver_unregister(&driver->drv); } EXPORT_SYMBOL(pcmcia_unregister_driver); /* pcmcia_device handling */ struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev) { struct device *tmp_dev; tmp_dev = get_device(&p_dev->dev); if (!tmp_dev) return NULL; return to_pcmcia_dev(tmp_dev); } void pcmcia_put_dev(struct pcmcia_device *p_dev) { if (p_dev) put_device(&p_dev->dev); } static void pcmcia_release_function(struct kref *ref) { struct config_t *c = container_of(ref, struct config_t, ref); kfree(c); } static void pcmcia_release_dev(struct device *dev) { struct pcmcia_device *p_dev = to_pcmcia_dev(dev); ds_dbg(1, "releasing dev %p\n", p_dev); pcmcia_put_socket(p_dev->socket); kfree(p_dev->devname); kref_put(&p_dev->function_config->ref, pcmcia_release_function); kfree(p_dev); } static void pcmcia_add_pseudo_device(struct pcmcia_socket *s) { if (!s->pcmcia_state.device_add_pending) { s->pcmcia_state.device_add_pending = 1; schedule_work(&s->device_add); } return; } static int pcmcia_device_probe(struct device * dev) { struct pcmcia_device *p_dev; struct pcmcia_driver *p_drv; struct pcmcia_device_id *did; struct pcmcia_socket *s; int ret = 0; dev = get_device(dev); if (!dev) return -ENODEV; p_dev = to_pcmcia_dev(dev); p_drv = to_pcmcia_drv(dev->driver); s = p_dev->socket; if ((!p_drv->probe) || (!p_dev->function_config) || (!try_module_get(p_drv->owner))) { ret = -EINVAL; goto put_dev; } ret = p_drv->probe(p_dev); if (ret) goto put_module; /* handle pseudo multifunction devices: * there are at most two pseudo multifunction devices. * if we're matching against the first, schedule a * call which will then check whether there are two * pseudo devices, and if not, add the second one. */ did = p_dev->dev.driver_data; if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) pcmcia_add_pseudo_device(p_dev->socket); put_module: if (ret) module_put(p_drv->owner); put_dev: if (ret) put_device(dev); return (ret); } /* * Removes a PCMCIA card from the device tree and socket list. */ static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) { struct pcmcia_device *p_dev; struct pcmcia_device *tmp; unsigned long flags; ds_dbg(2, "unbind_request(%d)\n", s->sock); if (!leftover) s->device_count = 0; else s->device_count = 1; /* unregister all pcmcia_devices registered with this socket, except leftover */ list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { if (p_dev == leftover) continue; spin_lock_irqsave(&pcmcia_dev_list_lock, flags); list_del(&p_dev->socket_device_list); p_dev->_removed=1; spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); device_unregister(&p_dev->dev); } return; } static int pcmcia_device_remove(struct device * dev) { struct pcmcia_device *p_dev; struct pcmcia_driver *p_drv; struct pcmcia_device_id *did; int i; p_dev = to_pcmcia_dev(dev); p_drv = to_pcmcia_drv(dev->driver); /* If we're removing the primary module driving a * pseudo multi-function card, we need to unbind * all devices */ did = p_dev->dev.driver_data; if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) && (p_dev->socket->device_count != 0) && (p_dev->device_no == 0)) pcmcia_card_remove(p_dev->socket, p_dev); /* detach the "instance" */ if (!p_drv) return 0; if (p_drv->remove) p_drv->remove(p_dev); p_dev->dev_node = NULL; /* check for proper unloading */ if (p_dev->_irq || p_dev->_io || p_dev->_locked) printk(KERN_INFO "pcmcia: driver %s did not release config properly\n", p_drv->drv.name); for (i = 0; i < MAX_WIN; i++) if (p_dev->_win & CLIENT_WIN_REQ(i)) printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n", p_drv->drv.name); /* references from pcmcia_probe_device */ pcmcia_put_dev(p_dev); module_put(p_drv->owner); return 0; } /* * pcmcia_device_query -- determine information about a pcmcia device */ 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; vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL); if (!vers1) return -ENOMEM; if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_MANFID, &manf_id)) { 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; } if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_FUNCID, &func_id)) { p_dev->func_id = func_id.func; p_dev->has_func_id = 1; } 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)) { ds_dbg(0, "mem device geometry probably means " "FUNCID_MEMORY\n"); p_dev->func_id = CISTPL_FUNCID_MEMORY; p_dev->has_func_id = 1; } kfree(devgeo); } if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1, vers1)) { for (i=0; i < vers1->ns; i++) { char *tmp; unsigned int length; tmp = vers1->str + vers1->ofs[i]; length = strlen(tmp) + 1; if ((length < 2) || (length > 255)) continue; p_dev->prod_id[i] = kmalloc(sizeof(char) * length, GFP_KERNEL); if (!p_dev->prod_id[i]) continue; p_dev->prod_id[i] = strncpy(p_dev->prod_id[i], tmp, length); } } kfree(vers1); return 0; } /* device_add_lock is needed to avoid double registration by cardmgr and kernel. * Serializes pcmcia_device_add; will most likely be removed in future. * * While it has the caveat that adding new PCMCIA devices inside(!) device_register() * won't work, this doesn't matter much at the moment: the driver core doesn't * support it either. */ static DEFINE_MUTEX(device_add_lock); struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function) { struct pcmcia_device *p_dev, *tmp_dev; unsigned long flags; int bus_id_len; s = pcmcia_get_socket(s); if (!s) return NULL; mutex_lock(&device_add_lock); /* max of 2 devices per card */ if (s->device_count == 2) goto err_put; p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL); if (!p_dev) goto err_put; p_dev->socket = s; p_dev->device_no = (s->device_count++); p_dev->func = function; if (s->functions <= function) s->functions = function + 1; p_dev->dev.bus = &pcmcia_bus_type; p_dev->dev.parent = s->dev.dev; p_dev->dev.release = pcmcia_release_dev; bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no); p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL); if (!p_dev->devname) goto err_free; sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id); /* compat */ spin_lock_irqsave(&pcmcia_dev_list_lock, flags); /* * p_dev->function_config must be the same for all card functions. * Note that this is serialized by the device_add_lock, 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; 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); spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); if (!p_dev->function_config) { p_dev->function_config = kzalloc(sizeof(struct config_t), GFP_KERNEL); if (!p_dev->function_config) goto err_unreg; kref_init(&p_dev->function_config->ref); } printk(KERN_NOTICE "pcmcia: registering new device %s\n", p_dev->devname); pcmcia_device_query(p_dev); if (device_register(&p_dev->dev)) goto err_unreg; mutex_unlock(&device_add_lock); return p_dev; err_unreg: spin_lock_irqsave(&pcmcia_dev_list_lock, flags); list_del(&p_dev->socket_device_list); spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); err_free: kfree(p_dev->devname); kfree(p_dev); s->device_count--; err_put: mutex_unlock(&device_add_lock); pcmcia_put_socket(s); return NULL; } static int pcmcia_card_add(struct pcmcia_socket *s) { cisinfo_t cisinfo; cistpl_longlink_mfc_t mfc; unsigned int no_funcs, i; int ret = 0; if (!(s->resource_setup_done)) return -EAGAIN; /* try again, but later... */ if (pcmcia_validate_mem(s)) return -EAGAIN; /* try again, but later... */ ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo); if (ret || !cisinfo.Chains) { ds_dbg(0, "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; for (i=0; i < no_funcs; i++) pcmcia_device_add(s, i); return (ret); } static void pcmcia_delayed_add_pseudo_device(void *data) { struct pcmcia_socket *s = data; pcmcia_device_add(s, 0); s->pcmcia_state.device_add_pending = 0; } static int pcmcia_requery(struct device *dev, void * _data) { struct pcmcia_device *p_dev = to_pcmcia_dev(dev); if (!p_dev->dev.driver) pcmcia_device_query(p_dev); return 0; } static void pcmcia_bus_rescan(struct pcmcia_socket *skt) { int no_devices=0; unsigned long flags; /* must be called with skt_mutex held */ spin_lock_irqsave(&pcmcia_dev_list_lock, flags); if (list_empty(&skt->devices_list)) no_devices=1; spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); /* if no devices were added for this socket yet because of * missing resource information or other trouble, we need to * do this now. */ if (no_devices) { int ret = pcmcia_card_add(skt); if (ret) 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); /* we re-scan all devices, not just the ones connected to this * socket. This does not matter, though. */ bus_rescan_devices(&pcmcia_bus_type); } static inline int pcmcia_devmatch(struct pcmcia_device *dev, 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) { if (dev->device_no != did->device_no) return 0; } if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { 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 (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) 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. */ if (!dev->allow_func_id_match) return 0; } if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { if (!dev->socket->fake_cis) pcmcia_load_firmware(dev, did->cisfile); if (!dev->socket->fake_cis) 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; } dev->dev.driver_data = (void *) did; 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); struct pcmcia_device_id *did = p_drv->id_table; #ifdef CONFIG_PCMCIA_IOCTL /* matching by cardmgr */ if (p_dev->cardmgr == p_drv) return 1; #endif while (did && did->match_flags) { if (pcmcia_devmatch(p_dev, did)) return 1; did++; } return 0; } #ifdef CONFIG_HOTPLUG static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size) { struct pcmcia_device *p_dev; int i, length = 0; 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])); } i = 0; if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, "SOCKET_NO=%u", p_dev->socket->sock)) return -ENOMEM; if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, "DEVICE_NO=%02X", p_dev->device_no)) return -ENOMEM; if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, "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; envp[i] = NULL; return 0; } #else static int pcmcia_bus_uevent(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size) { return -ENODEV; } #endif /************************ 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; \ } #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; \ } pcmcia_device_attr(func, socket, "0x%02x\n"); 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 pcmcia_show_pm_state(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 pcmcia_store_pm_state(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 = dpm_runtime_suspend(dev, PMSG_SUSPEND); else if (p_dev->suspended && !strncmp(buf, "on", 2)) dpm_runtime_resume(dev); return ret ? ret : count; } 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 ssize_t pcmcia_store_allow_func_id_match(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->skt_mutex); p_dev->allow_func_id_match = 1; mutex_unlock(&p_dev->socket->skt_mutex); bus_rescan_devices(&pcmcia_bus_type); return count; } static struct device_attribute pcmcia_dev_attrs[] = { __ATTR(function, 0444, func_show, NULL), __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state), __ATTR_RO(func_id), __ATTR_RO(manf_id), __ATTR_RO(card_id), __ATTR_RO(prod_id1), __ATTR_RO(prod_id2), __ATTR_RO(prod_id3), __ATTR_RO(prod_id4), __ATTR_RO(modalias), __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match), __ATTR_NULL, }; /* PM support, also needed for reset */ static int pcmcia_dev_suspend(struct device * dev, pm_message_t state) { struct pcmcia_device *p_dev = to_pcmcia_dev(dev); struct pcmcia_driver *p_drv = NULL; int ret = 0; 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) goto out; } if (p_dev->device_no == p_dev->func) pcmcia_release_configuration(p_dev); out: if (!ret) p_dev->suspended = 1; 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; if (dev->driver) p_drv = to_pcmcia_drv(dev->driver); if (!p_drv) goto out; if (p_dev->device_no == p_dev->func) { ret = pcmcia_request_configuration(p_dev, &p_dev->conf); if (ret) goto out; } if (p_drv->resume) ret = p_drv->resume(p_dev); out: if (!ret) p_dev->suspended = 0; 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) return 0; return dpm_runtime_suspend(dev, PMSG_SUSPEND); } 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) return 0; dpm_runtime_resume(dev); return 0; } static int pcmcia_bus_resume(struct pcmcia_socket *skt) { bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback); return 0; } static int pcmcia_bus_suspend(struct pcmcia_socket *skt) { if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_suspend_callback)) { pcmcia_bus_resume(skt); return -EIO; } return 0; } /*====================================================================== The card status event handler. ======================================================================*/ /* Normally, the event is passed to individual drivers after * informing userspace. Only for CS_EVENT_CARD_REMOVAL this * is inversed to maintain historic compatibility. */ static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) { struct pcmcia_socket *s = pcmcia_get_socket(skt); if (!s) { printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \ "failed, event 0x%x lost!\n", skt, event); return -ENODEV; } ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n", event, priority, skt); switch (event) { case CS_EVENT_CARD_REMOVAL: s->pcmcia_state.present = 0; pcmcia_card_remove(skt, NULL); handle_event(skt, event); break; case CS_EVENT_CARD_INSERTION: s->pcmcia_state.present = 1; pcmcia_card_add(skt); handle_event(skt, event); break; case CS_EVENT_EJECTION_REQUEST: break; case CS_EVENT_PM_SUSPEND: case CS_EVENT_PM_RESUME: case CS_EVENT_RESET_PHYSICAL: case CS_EVENT_CARD_RESET: default: handle_event(skt, event); break; } pcmcia_put_socket(s); return 0; } /* ds_event */ 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 (!p_dev->socket->pcmcia_state.present) goto out; if (p_dev->_removed) goto out; if (p_dev->suspended) goto out; ret = p_dev; out: pcmcia_put_dev(p_dev); return ret; } EXPORT_SYMBOL(pcmcia_dev_present); static struct pcmcia_callback pcmcia_bus_callback = { .owner = THIS_MODULE, .event = ds_event, .requery = pcmcia_bus_rescan, .suspend = pcmcia_bus_suspend, .resume = pcmcia_bus_resume, }; static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev, struct class_interface *class_intf) { struct pcmcia_socket *socket = class_get_devdata(class_dev); int ret; socket = pcmcia_get_socket(socket); if (!socket) { printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket); return -ENODEV; } /* * Ugly. But we want to wait for the socket threads to have started up. * We really should let the drivers themselves drive some of this.. */ msleep(250); #ifdef CONFIG_PCMCIA_IOCTL init_waitqueue_head(&socket->queue); #endif INIT_LIST_HEAD(&socket->devices_list); INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket); memset(&socket->pcmcia_state, 0, sizeof(u8)); socket->device_count = 0; ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback); if (ret) { printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket); pcmcia_put_socket(socket); return (ret); } return 0; } static void pcmcia_bus_remove_socket(struct class_device *class_dev, struct class_interface *class_intf) { struct pcmcia_socket *socket = class_get_devdata(class_dev); if (!socket) return; socket->pcmcia_state.dead = 1; pccard_register_pcmcia(socket, NULL); pcmcia_put_socket(socket); return; } /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ static struct class_interface pcmcia_bus_interface = { .class = &pcmcia_socket_class, .add = &pcmcia_bus_add_socket, .remove = &pcmcia_bus_remove_socket, }; struct bus_type pcmcia_bus_type = { .name = "pcmcia", .uevent = pcmcia_bus_uevent, .match = pcmcia_bus_match, .dev_attrs = pcmcia_dev_attrs, .probe = pcmcia_device_probe, .remove = pcmcia_device_remove, .suspend = pcmcia_dev_suspend, .resume = pcmcia_dev_resume, }; static int __init init_pcmcia_bus(void) { spin_lock_init(&pcmcia_dev_list_lock); bus_register(&pcmcia_bus_type); class_interface_register(&pcmcia_bus_interface); pcmcia_setup_ioctl(); 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) { pcmcia_cleanup_ioctl(); class_interface_unregister(&pcmcia_bus_interface); bus_unregister(&pcmcia_bus_type); } module_exit(exit_pcmcia_bus); MODULE_ALIAS("ds");