| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Dominik Brodowski | 5419 | 80.94% | 108 | 71.05% |
| Bernhard Walle | 526 | 7.86% | 1 | 0.66% |
| Greg Kroah-Hartman | 168 | 2.51% | 6 | 3.95% |
| Alan Stern | 121 | 1.81% | 2 | 1.32% |
| Linus Torvalds (pre-git) | 70 | 1.05% | 2 | 1.32% |
| Ingo Molnar | 65 | 0.97% | 1 | 0.66% |
| Randy Dunlap | 54 | 0.81% | 2 | 1.32% |
| Kay Sievers | 37 | 0.55% | 3 | 1.97% |
| Russell King | 34 | 0.51% | 4 | 2.63% |
| Brice Goglin | 34 | 0.51% | 1 | 0.66% |
| Alexander Kurz | 24 | 0.36% | 1 | 0.66% |
| Daniel Ritz | 24 | 0.36% | 2 | 1.32% |
| James Bottomley | 21 | 0.31% | 1 | 0.66% |
| David Brownell | 19 | 0.28% | 1 | 0.66% |
| Linus Torvalds | 15 | 0.22% | 1 | 0.66% |
| Joe Perches | 14 | 0.21% | 2 | 1.32% |
| Alan Cox | 12 | 0.18% | 1 | 0.66% |
| Dmitry Torokhov | 10 | 0.15% | 1 | 0.66% |
| Jun Komuro | 9 | 0.13% | 2 | 1.32% |
| Wolfram Sang | 5 | 0.07% | 1 | 0.66% |
| Tejun Heo | 3 | 0.04% | 1 | 0.66% |
| Geliang Tang | 2 | 0.03% | 1 | 0.66% |
| Thomas Gleixner | 2 | 0.03% | 1 | 0.66% |
| Pavel Roskin | 2 | 0.03% | 1 | 0.66% |
| Janos Farkas | 1 | 0.01% | 1 | 0.66% |
| Sam Ravnborg | 1 | 0.01% | 1 | 0.66% |
| Mauro Carvalho Chehab | 1 | 0.01% | 1 | 0.66% |
| Samuel Ortiz | 1 | 0.01% | 1 | 0.66% |
| Christoph Hellwig | 1 | 0.01% | 1 | 0.66% |
| Total | 6695 | 152 |
// SPDX-License-Identifier: GPL-2.0-only /* * ds.c -- 16-bit PCMCIA core support * * 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 - 2010 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> #include <linux/dma-mapping.h> #include <linux/slab.h> #include <pcmcia/cistpl.h> #include <pcmcia/ds.h> #include <pcmcia/ss.h> #include "cs_internal.h" /*====================================================================*/ /* Module parameters */ MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); MODULE_DESCRIPTION("PCMCIA Driver Services"); MODULE_LICENSE("GPL"); /*====================================================================*/ static void pcmcia_check_driver(struct pcmcia_driver *p_drv) { const 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->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->name, did->prod_id[i], did->prod_id_hash[i], hash); printk(KERN_DEBUG "pcmcia: see " "Documentation/pcmcia/devicetable.rst for " "details\n"); } did++; } return; } /*======================================================================*/ struct pcmcia_dynid { struct list_head node; struct pcmcia_device_id id; }; /** * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices * @driver: target device driver * @buf: buffer for scanning device ID data * @count: input size * * Adds a new dynamic PCMCIA device ID to this driver, * and causes the driver to probe for all devices again. */ static ssize_t new_id_store(struct device_driver *driver, const char *buf, size_t count) { struct pcmcia_dynid *dynid; struct pcmcia_driver *pdrv = to_pcmcia_drv(driver); __u16 match_flags, manf_id, card_id; __u8 func_id, function, device_no; __u32 prod_id_hash[4] = {0, 0, 0, 0}; int fields = 0; int retval = 0; fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x", &match_flags, &manf_id, &card_id, &func_id, &function, &device_no, &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]); if (fields < 6) return -EINVAL; dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL); if (!dynid) return -ENOMEM; dynid->id.match_flags = match_flags; dynid->id.manf_id = manf_id; dynid->id.card_id = card_id; dynid->id.func_id = func_id; dynid->id.function = function; dynid->id.device_no = device_no; memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4); mutex_lock(&pdrv->dynids.lock); list_add_tail(&dynid->node, &pdrv->dynids.list); mutex_unlock(&pdrv->dynids.lock); retval = driver_attach(&pdrv->drv); if (retval) return retval; return count; } static DRIVER_ATTR_WO(new_id); static void pcmcia_free_dynids(struct pcmcia_driver *drv) { struct pcmcia_dynid *dynid, *n; mutex_lock(&drv->dynids.lock); list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { list_del(&dynid->node); kfree(dynid); } mutex_unlock(&drv->dynids.lock); } static int pcmcia_create_newid_file(struct pcmcia_driver *drv) { int error = 0; if (drv->probe != NULL) error = driver_create_file(&drv->drv, &driver_attr_new_id); return error; } static void pcmcia_remove_newid_file(struct pcmcia_driver *drv) { driver_remove_file(&drv->drv, &driver_attr_new_id); } /** * pcmcia_register_driver - register a PCMCIA driver with the bus core * @driver: the &driver being registered * * Registers a PCMCIA driver with the PCMCIA bus core. */ int pcmcia_register_driver(struct pcmcia_driver *driver) { int error; if (!driver) return -EINVAL; pcmcia_check_driver(driver); /* initialize common fields */ driver->drv.bus = &pcmcia_bus_type; driver->drv.owner = driver->owner; driver->drv.name = driver->name; mutex_init(&driver->dynids.lock); INIT_LIST_HEAD(&driver->dynids.list); pr_debug("registering driver %s\n", driver->name); error = driver_register(&driver->drv); if (error < 0) return error; error = pcmcia_create_newid_file(driver); if (error) driver_unregister(&driver->drv); return error; } EXPORT_SYMBOL(pcmcia_register_driver); /** * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core * @driver: the &driver being unregistered */ void pcmcia_unregister_driver(struct pcmcia_driver *driver) { pr_debug("unregistering driver %s\n", driver->name); pcmcia_remove_newid_file(driver); driver_unregister(&driver->drv); pcmcia_free_dynids(driver); } EXPORT_SYMBOL(pcmcia_unregister_driver); /* pcmcia_device handling */ static 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); } static 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); pr_debug("releasing config_t\n"); kfree(c); } static void pcmcia_release_dev(struct device *dev) { struct pcmcia_device *p_dev = to_pcmcia_dev(dev); int i; dev_dbg(dev, "releasing device\n"); pcmcia_put_socket(p_dev->socket); for (i = 0; i < 4; i++) kfree(p_dev->prod_id[i]); kfree(p_dev->devname); kref_put(&p_dev->function_config->ref, pcmcia_release_function); kfree(p_dev); } static int pcmcia_device_probe(struct device *dev) { struct pcmcia_device *p_dev; struct pcmcia_driver *p_drv; struct pcmcia_socket *s; cistpl_config_t cis_config; 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; dev_dbg(dev, "trying to bind to %s\n", p_drv->name); if ((!p_drv->probe) || (!p_dev->function_config) || (!try_module_get(p_drv->owner))) { ret = -EINVAL; goto put_dev; } /* set up some more device information */ ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG, &cis_config); if (!ret) { p_dev->config_base = cis_config.base; p_dev->config_regs = cis_config.rmask[0]; dev_dbg(dev, "base %x, regs %x", p_dev->config_base, p_dev->config_regs); } else { dev_info(dev, "pcmcia: could not parse base and rmask0 of CIS\n"); p_dev->config_base = 0; p_dev->config_regs = 0; } ret = p_drv->probe(p_dev); if (ret) { dev_dbg(dev, "binding to %s failed with %d\n", p_drv->name, ret); goto put_module; } dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d", p_drv->name, p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq); dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR", p_dev->resource[0], p_dev->resource[1], p_dev->resource[2], p_dev->resource[3], p_dev->resource[4]); mutex_lock(&s->ops_mutex); if ((s->pcmcia_pfc) && (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); mutex_unlock(&s->ops_mutex); 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; dev_dbg(leftover ? &leftover->dev : &s->dev, "pcmcia_card_remove(%d) %s\n", s->sock, leftover ? leftover->devname : ""); mutex_lock(&s->ops_mutex); if (!leftover) s->device_count = 0; else s->device_count = 1; mutex_unlock(&s->ops_mutex); /* 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; mutex_lock(&s->ops_mutex); list_del(&p_dev->socket_device_list); mutex_unlock(&s->ops_mutex); dev_dbg(&p_dev->dev, "unregistering device\n"); device_unregister(&p_dev->dev); } return; } static int pcmcia_device_remove(struct device *dev) { struct pcmcia_device *p_dev; struct pcmcia_driver *p_drv; int i; p_dev = to_pcmcia_dev(dev); p_drv = to_pcmcia_drv(dev->driver); dev_dbg(dev, "removing device\n"); /* If we're removing the primary module driving a * pseudo multi-function card, we need to unbind * all devices */ if ((p_dev->socket->pcmcia_pfc) && (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); /* check for proper unloading */ 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); for (i = 0; i < MAX_WIN; i++) if (p_dev->_win & CLIENT_WIN_REQ(i)) dev_info(dev, "pcmcia: driver %s did not release window properly\n", p_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, 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; mutex_unlock(&p_dev->socket->ops_mutex); } if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_FUNCID, &func_id)) { mutex_lock(&p_dev->socket->ops_mutex); 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 = DMA_MASK_NONE; 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");
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