From: Adam Belay This patch set is an updated version from the last and is against 2.6.8-rc3. It includes suggestions from Dominik and an independent pcmcia bugfix. I would appreciate any comments. This patch adds driver model support to the pcmcia bus driver. Signed-off-by: Andrew Morton --- 25-akpm/drivers/pcmcia/cs.c | 17 ++ 25-akpm/drivers/pcmcia/cs_internal.h | 1 25-akpm/drivers/pcmcia/ds.c | 203 ++++++++++++++++++++++++++++++++++- 25-akpm/include/pcmcia/cs.h | 2 25-akpm/include/pcmcia/ds.h | 15 ++ 5 files changed, 237 insertions(+), 1 deletion(-) diff -puN drivers/pcmcia/cs.c~pcmcia-implement-driver-model-support drivers/pcmcia/cs.c --- 25/drivers/pcmcia/cs.c~pcmcia-implement-driver-model-support 2004-08-24 22:07:03.576989056 -0700 +++ 25-akpm/drivers/pcmcia/cs.c 2004-08-24 22:07:03.586987536 -0700 @@ -1160,6 +1160,22 @@ EXPORT_SYMBOL(pcmcia_lookup_bus); #endif +/*===================================================================== + + Return the driver model device associated with a card.. + +======================================================================*/ + +struct device *pcmcia_lookup_device(client_handle_t handle) +{ + if (CHECK_HANDLE(handle)) + return NULL; + + return handle->device; +} + +EXPORT_SYMBOL(pcmcia_lookup_device); + /*====================================================================== Get the current socket state bits. We don't support the latched @@ -2153,6 +2169,7 @@ EXPORT_SYMBOL(pcmcia_set_event_mask); EXPORT_SYMBOL(pcmcia_suspend_card); EXPORT_SYMBOL(pcmcia_validate_cis); EXPORT_SYMBOL(pcmcia_write_memory); +EXPORT_SYMBOL(read_tuple); EXPORT_SYMBOL(dead_socket); EXPORT_SYMBOL(MTDHelperEntry); diff -puN drivers/pcmcia/cs_internal.h~pcmcia-implement-driver-model-support drivers/pcmcia/cs_internal.h --- 25/drivers/pcmcia/cs_internal.h~pcmcia-implement-driver-model-support 2004-08-24 22:07:03.577988904 -0700 +++ 25-akpm/drivers/pcmcia/cs_internal.h 2004-08-24 22:07:03.587987384 -0700 @@ -33,6 +33,7 @@ typedef struct eraseq_t { typedef struct client_t { u_short client_magic; struct pcmcia_socket *Socket; + struct device *device; u_char Function; dev_info_t dev_info; u_int Attributes; diff -puN drivers/pcmcia/ds.c~pcmcia-implement-driver-model-support drivers/pcmcia/ds.c --- 25/drivers/pcmcia/ds.c~pcmcia-implement-driver-model-support 2004-08-24 22:07:03.578988752 -0700 +++ 25-akpm/drivers/pcmcia/ds.c 2004-08-24 22:07:03.589987080 -0700 @@ -119,6 +119,8 @@ struct pcmcia_bus_socket { struct work_struct removal; socket_bind_t *bind; struct pcmcia_socket *parent; + struct list_head devices; + struct semaphore device_mutex; }; #define DS_SOCKET_PRESENT 0x01 @@ -164,6 +166,7 @@ static int pcmcia_bind_device(bind_req_t client->client_magic = CLIENT_MAGIC; strlcpy(client->dev_info, (char *)req->dev_info, DEV_NAME_LEN); client->Socket = s; + client->device = &req->device->dev; client->Function = req->Function; client->state = CLIENT_UNBOUND; client->erase_busy.next = &client->erase_busy; @@ -354,6 +357,8 @@ EXPORT_SYMBOL(cs_error); /*======================================================================*/ +static struct pcmcia_device * get_pcmcia_device (struct pcmcia_bus_socket *s, int function); +static void put_pcmcia_device(struct pcmcia_device *dev); static struct pcmcia_driver * get_pcmcia_driver (dev_info_t *dev_info); static struct pcmcia_bus_socket * get_socket_info_by_nr(unsigned int nr); @@ -430,6 +435,150 @@ static int proc_read_drivers(char *buf, /*====================================================================== + sysfs support + +======================================================================*/ + +static ssize_t +pcmcia_show_product_string(struct pcmcia_device *dev, char *buf, int index) +{ + char *str = buf; + + if (dev->id_mask & DEVICE_HAS_VERSION_INFO && index < dev->vers_1.ns) + str += sprintf(str,"%s\n", + dev->vers_1.str+dev->vers_1.ofs[index]); + else + str += sprintf(str,"\n"); + return (str - buf); +} + +#define pcmcia_prod_str_attr(field, index) \ +static ssize_t \ +show_##field (struct device *dmdev, char *buf) \ +{ \ + struct pcmcia_device *dev; \ + \ + dev = to_pcmcia_device (dmdev); \ + return pcmcia_show_product_string(dev,buf,index); \ +} \ +static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); + +pcmcia_prod_str_attr(prod_str0,0); +pcmcia_prod_str_attr(prod_str1,1); +pcmcia_prod_str_attr(prod_str2,2); +pcmcia_prod_str_attr(prod_str3,3); + +static ssize_t +pcmcia_show_manfid(struct device *dmdev, char *buf) +{ + struct pcmcia_device *dev = to_pcmcia_device(dmdev); + char *str = buf; + + if (dev->id_mask & DEVICE_HAS_MANF_INFO) + str += sprintf(str,"0x%04x, 0x%04x\n", + dev->manfid.manf, + dev->manfid.card); + else + str += sprintf(str,"\n"); + return (str - buf); +} + +static DEVICE_ATTR(manfid,S_IRUGO,pcmcia_show_manfid,NULL); + +static void pcmcia_sysfs_attach(struct pcmcia_device *dev) +{ + device_create_file (&dev->dev, &dev_attr_prod_str0); + device_create_file (&dev->dev, &dev_attr_prod_str1); + device_create_file (&dev->dev, &dev_attr_prod_str2); + device_create_file (&dev->dev, &dev_attr_prod_str3); + device_create_file (&dev->dev, &dev_attr_manfid); +} + +/*====================================================================== + + device addition, removal, and hotplug functions for the driver model + +======================================================================*/ + +static void pcmcia_bus_release_device(struct device *pdev) +{ + struct pcmcia_device *dev = to_pcmcia_device(pdev); + kfree(dev); +} + +static int pcmcia_bus_insert_card(struct pcmcia_bus_socket *s) +{ + struct pcmcia_device *dev; + int i, ret, function_count = 0, has_cis = 0; + cisinfo_t cisinfo; + + if (!(s->state & DS_SOCKET_PRESENT)) + return CS_NO_CARD; + + down(&s->device_mutex); + if (!list_empty(&s->devices)) { + ret = -EBUSY; + goto out; + } + + ret = pcmcia_validate_cis(s->handle, &cisinfo); + if (ret) + goto out; + + if (cisinfo.Chains) { + cistpl_longlink_mfc_t mfc; + + has_cis = 1; + if (!read_tuple(s->handle, CISTPL_LONGLINK_MFC, &mfc)) + function_count = mfc.nfn; + } + + for (i=0; i<=function_count; i++) { + dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL); + if (!dev) + continue; + + memset(dev, 0, sizeof(struct pcmcia_device)); + dev->socket = s; + dev->dev.parent = s->parent->dev.dev; + dev->dev.bus = &pcmcia_bus_type; + dev->dev.release = &pcmcia_bus_release_device; + snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%u:%u", s->parent->sock, i); + + dev->function = i; + if (has_cis) { + if (!read_tuple(s->handle, CISTPL_VERS_1, &dev->vers_1)) + dev->id_mask |= DEVICE_HAS_VERSION_INFO; + if (!read_tuple(s->handle, CISTPL_MANFID, &dev->manfid)) + dev->id_mask |= DEVICE_HAS_MANF_INFO; + } + + ret = device_register(&dev->dev); + if (!ret) { + list_add_tail(&dev->device_list, &s->devices); + pcmcia_sysfs_attach(dev); + } else + kfree(dev); + } + +out: + up(&s->device_mutex); + return ret; +} + +static void pcmcia_bus_remove_card(struct pcmcia_bus_socket *s) +{ + struct pcmcia_device *dev, *tmp; + down(&s->device_mutex); + list_for_each_entry_safe(dev, tmp, &s->devices, device_list) { + list_del(&dev->device_list); + device_unregister(&dev->dev); + } + up(&s->device_mutex); +} + +/*====================================================================== + These manage a ring buffer of events pending for one user process ======================================================================*/ @@ -501,6 +650,7 @@ static int ds_event(event_t event, int p case CS_EVENT_CARD_REMOVAL: s->state &= ~DS_SOCKET_PRESENT; + pcmcia_bus_remove_card(s); if (!(s->state & DS_SOCKET_REMOVAL_PENDING)) { s->state |= DS_SOCKET_REMOVAL_PENDING; schedule_delayed_work(&s->removal, HZ/10); @@ -562,6 +712,7 @@ static int bind_mtd(struct pcmcia_bus_so static int bind_request(struct pcmcia_bus_socket *s, bind_info_t *bind_info) { struct pcmcia_driver *driver; + struct pcmcia_device *device; socket_bind_t *b; bind_req_t bind_req; int ret; @@ -587,7 +738,12 @@ static int bind_request(struct pcmcia_bu if (!try_module_get(driver->owner)) return -EINVAL; + device = get_pcmcia_device(s, bind_info->function); + if (!device) + return -EINVAL; + bind_req.Socket = s->parent; + bind_req.device = device; bind_req.Function = bind_info->function; bind_req.dev_info = (dev_info_t *) driver->drv.name; ret = pcmcia_bind_device(&bind_req); @@ -614,16 +770,25 @@ static int bind_request(struct pcmcia_bu b->next = s->bind; s->bind = b; + down_write(&device->dev.bus->subsys.rwsem); + device->dev.driver = &driver->drv; + if (driver->attach) { b->instance = driver->attach(); if (b->instance == NULL) { printk(KERN_NOTICE "ds: unable to create instance " "of '%s'!\n", (char *)bind_info->dev_info); module_put(driver->owner); + device->dev.driver = NULL; + up_write(&device->dev.bus->subsys.rwsem); return -ENODEV; } } + device_bind_driver(&device->dev); + up_write(&device->dev.bus->subsys.rwsem); + put_pcmcia_device(device); + return 0; } /* bind_request */ @@ -699,6 +864,7 @@ static int get_device_info(struct pcmcia static int unbind_request(struct pcmcia_bus_socket *s, bind_info_t *bind_info) { socket_bind_t **b, *c; + struct pcmcia_device *device; ds_dbg(2, "unbind_request(%d, '%s')\n", s->parent->sock, (char *)bind_info->dev_info); @@ -710,6 +876,14 @@ static int unbind_request(struct pcmcia_ if (*b == NULL) return -ENODEV; + device = get_pcmcia_device(s, bind_info->function); + if (device) { + down_write(&device->dev.bus->subsys.rwsem); + device_release_driver(&device->dev); + up_write(&device->dev.bus->subsys.rwsem); + put_pcmcia_device(device); + } + c = *b; c->driver->use_count--; if (c->driver->detach) { @@ -1005,6 +1179,7 @@ static int ds_ioctl(struct inode * inode break; case DS_BIND_REQUEST: if (!capable(CAP_SYS_ADMIN)) return -EPERM; + pcmcia_bus_insert_card(s); err = bind_request(s, &buf.bind_info); break; case DS_GET_DEVICE_INFO: @@ -1087,6 +1262,8 @@ static int __devinit pcmcia_bus_add_sock init_waitqueue_head(&s->request); /* initialize data */ + INIT_LIST_HEAD(&s->devices); + init_MUTEX(&s->device_mutex); INIT_WORK(&s->removal, handle_removal, s); s->parent = socket; @@ -1135,6 +1312,8 @@ static void pcmcia_bus_remove_socket(str pcmcia_deregister_client(socket->pcmcia->handle); + pcmcia_bus_remove_card(socket->pcmcia); + socket->pcmcia->state |= DS_SOCKET_DEAD; pcmcia_put_bus_socket(socket->pcmcia); socket->pcmcia = NULL; @@ -1154,6 +1333,7 @@ static struct class_interface pcmcia_bus struct bus_type pcmcia_bus_type = { .name = "pcmcia", }; + EXPORT_SYMBOL(pcmcia_bus_type); @@ -1186,7 +1366,6 @@ fs_initcall(init_pcmcia_bus); /* one lev static void __exit exit_pcmcia_bus(void) { - class_interface_unregister(&pcmcia_bus_interface); #ifdef CONFIG_PROC_FS if (proc_pccard) { @@ -1197,6 +1376,7 @@ static void __exit exit_pcmcia_bus(void) if (major_dev != -1) unregister_chrdev(major_dev, "pcmcia"); + class_interface_unregister(&pcmcia_bus_interface); bus_unregister(&pcmcia_bus_type); } module_exit(exit_pcmcia_bus); @@ -1244,3 +1424,24 @@ static struct pcmcia_driver * get_pcmcia return cmp.drv; return NULL; } + +static struct pcmcia_device * get_pcmcia_device (struct pcmcia_bus_socket *s, int function) +{ + struct pcmcia_device *dev, *tmp; + down(&s->device_mutex); + list_for_each_entry_safe(dev, tmp, &s->devices, device_list) { + if (dev->function == function) { + if (!get_device(&dev->dev)) + break; + up(&s->device_mutex); + return dev; + } + } + up(&s->device_mutex); + return NULL; +} + +static void put_pcmcia_device(struct pcmcia_device *dev) +{ + put_device(&dev->dev); +} diff -puN include/pcmcia/cs.h~pcmcia-implement-driver-model-support include/pcmcia/cs.h --- 25/include/pcmcia/cs.h~pcmcia-implement-driver-model-support 2004-08-24 22:07:03.580988448 -0700 +++ 25-akpm/include/pcmcia/cs.h 2004-08-24 22:07:03.590986928 -0700 @@ -318,6 +318,7 @@ typedef struct error_info_t { /* Special stuff for binding drivers to sockets */ typedef struct bind_req_t { struct pcmcia_socket *Socket; + struct pcmcia_device *device; u_char Function; dev_info_t *dev_info; } bind_req_t; @@ -452,6 +453,7 @@ int pcmcia_insert_card(struct pcmcia_soc int pcmcia_set_event_mask(client_handle_t handle, eventmask_t *mask); int pcmcia_report_error(client_handle_t handle, error_info_t *err); struct pci_bus *pcmcia_lookup_bus(client_handle_t handle); +struct device *pcmcia_lookup_device(client_handle_t handle); /* rsrc_mgr.c */ int pcmcia_adjust_resource_info(client_handle_t handle, adjust_t *adj); diff -puN include/pcmcia/ds.h~pcmcia-implement-driver-model-support include/pcmcia/ds.h --- 25/include/pcmcia/ds.h~pcmcia-implement-driver-model-support 2004-08-24 22:07:03.581988296 -0700 +++ 25-akpm/include/pcmcia/ds.h 2004-08-24 22:07:03.590986928 -0700 @@ -151,6 +151,21 @@ struct pcmcia_driver { struct device_driver drv; }; +struct pcmcia_device { + struct device dev; + struct pcmcia_bus_socket *socket; + struct list_head device_list; + int function; + int id_mask; + cistpl_vers_1_t vers_1; + cistpl_manfid_t manfid; +}; + +#define to_pcmcia_device(n) container_of(n, struct pcmcia_device, dev) + +#define DEVICE_HAS_VERSION_INFO 0x0001 +#define DEVICE_HAS_MANF_INFO 0x0002 + /* driver registration */ int pcmcia_register_driver(struct pcmcia_driver *driver); void pcmcia_unregister_driver(struct pcmcia_driver *driver); _