/* * tifm_core.c - TI FlashMedia driver * * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com> * * 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. * */ #include <linux/tifm.h> #include <linux/init.h> #include <linux/idr.h> #define DRIVER_NAME "tifm_core" #define DRIVER_VERSION "0.8" static struct workqueue_struct *workqueue; static DEFINE_IDR(tifm_adapter_idr); static DEFINE_SPINLOCK(tifm_adapter_lock); static const char *tifm_media_type_name(unsigned char type, unsigned char nt) { const char *card_type_name[3][3] = { { "SmartMedia/xD", "MemoryStick", "MMC/SD" }, { "XD", "MS", "SD"}, { "xd", "ms", "sd"} }; if (nt > 2 || type < 1 || type > 3) return NULL; return card_type_name[nt][type - 1]; } static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id) { if (sock->type == id->type) return 1; return 0; } static int tifm_bus_match(struct device *dev, struct device_driver *drv) { struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev); struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver, driver); struct tifm_device_id *ids = fm_drv->id_table; if (ids) { while (ids->type) { if (tifm_dev_match(sock, ids)) return 1; ++ids; } } return 0; } static int tifm_uevent(struct device *dev, struct kobj_uevent_env *env) { struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev); if (add_uevent_var(env, "TIFM_CARD_TYPE=%s", tifm_media_type_name(sock->type, 1))) return -ENOMEM; return 0; } static int tifm_device_probe(struct device *dev) { struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev); struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver, driver); int rc = -ENODEV; get_device(dev); if (dev->driver && drv->probe) { rc = drv->probe(sock); if (!rc) return 0; } put_device(dev); return rc; } static void tifm_dummy_event(struct tifm_dev *sock) { return; } static int tifm_device_remove(struct device *dev) { struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev); struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver, driver); if (dev->driver && drv->remove) { sock->card_event = tifm_dummy_event; sock->data_event = tifm_dummy_event; drv->remove(sock); sock->dev.driver = NULL; } put_device(dev); return 0; } #ifdef CONFIG_PM static int tifm_device_suspend(struct device *dev, pm_message_t state) { struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev); struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver, driver); if (dev->driver && drv->suspend) return drv->suspend(sock, state); return 0; } static int tifm_device_resume(struct device *dev) { struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev); struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver, driver); if (dev->driver && drv->resume) return drv->resume(sock); return 0; } #else #define tifm_device_suspend NULL #define tifm_device_resume NULL #endif /* CONFIG_PM */ static ssize_t type_show(struct device *dev, struct device_attribute *attr, char *buf) { struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev); return sprintf(buf, "%x", sock->type); } static struct device_attribute tifm_dev_attrs[] = { __ATTR(type, S_IRUGO, type_show, NULL), __ATTR_NULL }; static struct bus_type tifm_bus_type = { .name = "tifm", .dev_attrs = tifm_dev_attrs, .match = tifm_bus_match, .uevent = tifm_uevent, .probe = tifm_device_probe, .remove = tifm_device_remove, .suspend = tifm_device_suspend, .resume = tifm_device_resume }; static void tifm_free(struct device *dev) { struct tifm_adapter *fm = container_of(dev, struct tifm_adapter, dev); kfree(fm); } static struct class tifm_adapter_class = { .name = "tifm_adapter", .dev_release = tifm_free }; struct tifm_adapter *tifm_alloc_adapter(unsigned int num_sockets, struct device *dev) { struct tifm_adapter *fm; fm = kzalloc(sizeof(struct tifm_adapter) + sizeof(struct tifm_dev*) * num_sockets, GFP_KERNEL); if (fm) { fm->dev.class = &tifm_adapter_class; fm->dev.parent = dev; device_initialize(&fm->dev); spin_lock_init(&fm->lock); fm->num_sockets = num_sockets; } return fm; } EXPORT_SYMBOL(tifm_alloc_adapter); int tifm_add_adapter(struct tifm_adapter *fm) { int rc; if (!idr_pre_get(&tifm_adapter_idr, GFP_KERNEL)) return -ENOMEM; spin_lock(&tifm_adapter_lock); rc = idr_get_new(&tifm_adapter_idr, fm, &fm->id); spin_unlock(&tifm_adapter_lock); if (rc) return rc; snprintf(fm->dev.bus_id, BUS_ID_SIZE, "tifm%u", fm->id); rc = device_add(&fm->dev); if (rc) { spin_lock(&tifm_adapter_lock); idr_remove(&tifm_adapter_idr, fm->id); spin_unlock(&tifm_adapter_lock); } return rc; } EXPORT_SYMBOL(tifm_add_adapter); void tifm_remove_adapter(struct tifm_adapter *fm) { unsigned int cnt; flush_workqueue(workqueue); for (cnt = 0; cnt < fm->num_sockets; ++cnt) { if (fm->sockets[cnt]) device_unregister(&fm->sockets[cnt]->dev); } spin_lock(&tifm_adapter_lock); idr_remove(&tifm_adapter_idr, fm->id); spin_unlock(&tifm_adapter_lock); device_del(&fm->dev); } EXPORT_SYMBOL(tifm_remove_adapter); void tifm_free_adapter(struct tifm_adapter *fm) { put_device(&fm->dev); } EXPORT_SYMBOL(tifm_free_adapter); void tifm_free_device(struct device *dev) { struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev); kfree(sock); } EXPORT_SYMBOL(tifm_free_device); struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id, unsigned char type) { struct tifm_dev *sock = NULL; if (!tifm_media_type_name(type, 0)) return sock; sock = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL); if (sock) { spin_lock_init(&sock->lock); sock->type = type; sock->socket_id = id; sock->card_event = tifm_dummy_event; sock->data_event = tifm_dummy_event; sock->dev.parent = fm->dev.parent; sock->dev.bus = &tifm_bus_type; sock->dev.dma_mask = fm->dev.parent->dma_mask; sock->dev.release = tifm_free_device; snprintf(sock->dev.bus_id, BUS_ID_SIZE, "tifm_%s%u:%u", tifm_media_type_name(type, 2), fm->id, id); printk(KERN_INFO DRIVER_NAME ": %s card detected in socket %u:%u\n", tifm_media_type_name(type, 0), fm->id, id); } return sock; } EXPORT_SYMBOL(tifm_alloc_device); void tifm_eject(struct tifm_dev *sock) { struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent); fm->eject(fm, sock); } EXPORT_SYMBOL(tifm_eject); int tifm_has_ms_pif(struct tifm_dev *sock) { struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent); return fm->has_ms_pif(fm, sock); } EXPORT_SYMBOL(tifm_has_ms_pif); int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents, int direction) { return pci_map_sg(to_pci_dev(sock->dev.parent), sg, nents, direction); } EXPORT_SYMBOL(tifm_map_sg); void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents, int direction) { pci_unmap_sg(to_pci_dev(sock->dev.parent), sg, nents, direction); } EXPORT_SYMBOL(tifm_unmap_sg); void tifm_queue_work(struct work_struct *work) { queue_work(workqueue, work); } EXPORT_SYMBOL(tifm_queue_work); int tifm_register_driver(struct tifm_driver *drv) { drv->driver.bus = &tifm_bus_type; return driver_register(&drv->driver); } EXPORT_SYMBOL(tifm_register_driver); void tifm_unregister_driver(struct tifm_driver *drv) { driver_unregister(&drv->driver); } EXPORT_SYMBOL(tifm_unregister_driver); static int __init tifm_init(void) { int rc; workqueue = create_freezeable_workqueue("tifm"); if (!workqueue) return -ENOMEM; rc = bus_register(&tifm_bus_type); if (rc) goto err_out_wq; rc = class_register(&tifm_adapter_class); if (!rc) return 0; bus_unregister(&tifm_bus_type); err_out_wq: destroy_workqueue(workqueue); return rc; } static void __exit tifm_exit(void) { class_unregister(&tifm_adapter_class); bus_unregister(&tifm_bus_type); destroy_workqueue(workqueue); } subsys_initcall(tifm_init); module_exit(tifm_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Alex Dubov"); MODULE_DESCRIPTION("TI FlashMedia core driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRIVER_VERSION);