| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * tifm_core.c - TI FlashMedia driver |
| * |
| * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com> |
| */ |
| |
| #include <linux/tifm.h> |
| #include <linux/slab.h> |
| #include <linux/init.h> |
| #include <linux/idr.h> |
| #include <linux/module.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(const struct device *dev, struct kobj_uevent_env *env) |
| { |
| const struct tifm_dev *sock = container_of_const(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 void 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); |
| } |
| |
| #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 DEVICE_ATTR_RO(type); |
| |
| static struct attribute *tifm_dev_attrs[] = { |
| &dev_attr_type.attr, |
| NULL, |
| }; |
| ATTRIBUTE_GROUPS(tifm_dev); |
| |
| static const struct bus_type tifm_bus_type = { |
| .name = "tifm", |
| .dev_groups = tifm_dev_groups, |
| .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 const 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(struct_size(fm, sockets, 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; |
| |
| idr_preload(GFP_KERNEL); |
| spin_lock(&tifm_adapter_lock); |
| rc = idr_alloc(&tifm_adapter_idr, fm, 0, 0, GFP_NOWAIT); |
| if (rc >= 0) |
| fm->id = rc; |
| spin_unlock(&tifm_adapter_lock); |
| idr_preload_end(); |
| if (rc < 0) |
| return rc; |
| |
| dev_set_name(&fm->dev, "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; |
| |
| dev_set_name(&sock->dev, "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 dma_map_sg(&to_pci_dev(sock->dev.parent)->dev, sg, nents, |
| direction); |
| } |
| EXPORT_SYMBOL(tifm_map_sg); |
| |
| void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents, |
| int direction) |
| { |
| dma_unmap_sg(&to_pci_dev(sock->dev.parent)->dev, 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_freezable_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); |