[PATCH] mmc: driver for TI FlashMedia card reader - source

Driver for TI Flash Media card reader.  At present, only MMC/SD cards are
supported.

[akpm@osdl.org: cleanups, build fixes]
Signed-off-by: Alex Dubov <oakad@yahoo.com>
Cc: Daniel Qarras <dqarras@yahoo.com>
Acked-by: Pierre Ossman <drzeus@drzeus.cx>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

MAINTAINERS

@@ -2854,6 +2854,11 @@ M:	hlhung3i@gmail.com
 W:	http://tcp-lp-mod.sourceforge.net/
 S:	Maintained
 
+TI FLASH MEDIA INTERFACE DRIVER
+P:      Alex Dubov
+M:      oakad@yahoo.com
+S:      Maintained
+
 TI OMAP RANDOM NUMBER GENERATOR SUPPORT
 P:	Deepak Saxena
 M:	dsaxena@plexity.net

drivers/misc/tifm_core.c

+/*
+ *  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 "0.6"
+
+static DEFINE_IDR(tifm_adapter_idr);
+static DEFINE_SPINLOCK(tifm_adapter_lock);
+
+static tifm_media_id *tifm_device_match(tifm_media_id *ids,
+			struct tifm_dev *dev)
+{
+	while (*ids) {
+		if (dev->media_id == *ids)
+			return ids;
+		ids++;
+	}
+	return NULL;
+}
+
+static int tifm_match(struct device *dev, struct device_driver *drv)
+{
+	struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev);
+	struct tifm_driver *fm_drv;
+
+	fm_drv = container_of(drv, struct tifm_driver, driver);
+	if (!fm_drv->id_table)
+		return -EINVAL;
+	if (tifm_device_match(fm_drv->id_table, fm_dev))
+		return 1;
+	return -ENODEV;
+}
+
+static int tifm_uevent(struct device *dev, char **envp, int num_envp,
+		       char *buffer, int buffer_size)
+{
+	struct tifm_dev *fm_dev;
+	int i = 0;
+	int length = 0;
+	const char *card_type_name[] = {"INV", "SM", "MS", "SD"};
+
+	if (!dev || !(fm_dev = container_of(dev, struct tifm_dev, dev)))
+		return -ENODEV;
+	if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
+			"TIFM_CARD_TYPE=%s", card_type_name[fm_dev->media_id]))
+		return -ENOMEM;
+
+	return 0;
+}
+
+static struct bus_type tifm_bus_type = {
+	.name    = "tifm",
+	.match   = tifm_match,
+	.uevent  = tifm_uevent,
+};
+
+static void tifm_free(struct class_device *cdev)
+{
+	struct tifm_adapter *fm = container_of(cdev, struct tifm_adapter, cdev);
+
+	kfree(fm->sockets);
+	if (fm->wq)
+		destroy_workqueue(fm->wq);
+	kfree(fm);
+}
+
+static struct class tifm_adapter_class = {
+	.name    = "tifm_adapter",
+	.release = tifm_free
+};
+
+struct tifm_adapter *tifm_alloc_adapter(void)
+{
+	struct tifm_adapter *fm;
+
+	fm = kzalloc(sizeof(struct tifm_adapter), GFP_KERNEL);
+	if (fm) {
+		fm->cdev.class = &tifm_adapter_class;
+		spin_lock_init(&fm->lock);
+		class_device_initialize(&fm->cdev);
+	}
+	return fm;
+}
+EXPORT_SYMBOL(tifm_alloc_adapter);
+
+void tifm_free_adapter(struct tifm_adapter *fm)
+{
+	class_device_put(&fm->cdev);
+}
+EXPORT_SYMBOL(tifm_free_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) {
+		snprintf(fm->cdev.class_id, BUS_ID_SIZE, "tifm%u", fm->id);
+		strncpy(fm->wq_name, fm->cdev.class_id, KOBJ_NAME_LEN);
+
+		fm->wq = create_singlethread_workqueue(fm->wq_name);
+		if (fm->wq)
+			return class_device_add(&fm->cdev);
+
+		spin_lock(&tifm_adapter_lock);
+		idr_remove(&tifm_adapter_idr, fm->id);
+		spin_unlock(&tifm_adapter_lock);
+		rc = -ENOMEM;
+	}
+	return rc;
+}
+EXPORT_SYMBOL(tifm_add_adapter);
+
+void tifm_remove_adapter(struct tifm_adapter *fm)
+{
+	class_device_del(&fm->cdev);
+
+	spin_lock(&tifm_adapter_lock);
+	idr_remove(&tifm_adapter_idr, fm->id);
+	spin_unlock(&tifm_adapter_lock);
+}
+EXPORT_SYMBOL(tifm_remove_adapter);
+
+void tifm_free_device(struct device *dev)
+{
+	struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev);
+	if (fm_dev->wq)
+		destroy_workqueue(fm_dev->wq);
+	kfree(fm_dev);
+}
+EXPORT_SYMBOL(tifm_free_device);
+
+struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id)
+{
+	struct tifm_dev *dev = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL);
+
+	if (dev) {
+		spin_lock_init(&dev->lock);
+		snprintf(dev->wq_name, KOBJ_NAME_LEN, "tifm%u:%u", fm->id, id);
+		dev->wq = create_singlethread_workqueue(dev->wq_name);
+		if (!dev->wq) {
+			kfree(dev);
+			return 0;
+		}
+		dev->dev.parent = fm->dev;
+		dev->dev.bus = &tifm_bus_type;
+		dev->dev.release = tifm_free_device;
+	}
+	return dev;
+}
+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_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);
+
+static int tifm_device_probe(struct device *dev)
+{
+	struct tifm_driver *drv;
+	struct tifm_dev *fm_dev;
+	int rc = 0;
+	const tifm_media_id *id;
+
+	drv = container_of(dev->driver, struct tifm_driver, driver);
+	fm_dev = container_of(dev, struct tifm_dev, dev);
+	get_device(dev);
+	if (!fm_dev->drv && drv->probe && drv->id_table) {
+		rc = -ENODEV;
+		id = tifm_device_match(drv->id_table, fm_dev);
+		if (id)
+			rc = drv->probe(fm_dev);
+		if (rc >= 0) {
+			rc = 0;
+			fm_dev->drv = drv;
+		}
+	}
+	if (rc)
+		put_device(dev);
+	return rc;
+}
+
+static int tifm_device_remove(struct device *dev)
+{
+	struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev);
+	struct tifm_driver *drv = fm_dev->drv;
+
+	if (drv) {
+		if (drv->remove) drv->remove(fm_dev);
+		fm_dev->drv = 0;
+	}
+
+	put_device(dev);
+	return 0;
+}
+
+int tifm_register_driver(struct tifm_driver *drv)
+{
+	drv->driver.bus = &tifm_bus_type;
+	drv->driver.probe = tifm_device_probe;
+	drv->driver.remove = tifm_device_remove;
+
+	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 = bus_register(&tifm_bus_type);
+
+	if (!rc) {
+		rc = class_register(&tifm_adapter_class);
+		if (rc)
+			bus_unregister(&tifm_bus_type);
+	}
+
+	return rc;
+}
+
+static void __exit tifm_exit(void)
+{
+	class_unregister(&tifm_adapter_class);
+	bus_unregister(&tifm_bus_type);
+}
+
+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);

include/linux/tifm.h

+/*
+ *  tifm.h - 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.
+ *
+ */
+
+#ifndef _TIFM_H
+#define _TIFM_H
+
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+
+/* Host registers (relative to pci base address): */
+enum {
+	FM_SET_INTERRUPT_ENABLE   = 0x008,
+	FM_CLEAR_INTERRUPT_ENABLE = 0x00c,
+	FM_INTERRUPT_STATUS       = 0x014 };
+
+/* Socket registers (relative to socket base address): */
+enum {
+	SOCK_CONTROL                   = 0x004,
+	SOCK_PRESENT_STATE             = 0x008,
+	SOCK_DMA_ADDRESS               = 0x00c,
+	SOCK_DMA_CONTROL               = 0x010,
+	SOCK_DMA_FIFO_INT_ENABLE_SET   = 0x014,
+	SOCK_DMA_FIFO_INT_ENABLE_CLEAR = 0x018,
+	SOCK_DMA_FIFO_STATUS           = 0x020,
+	SOCK_FIFO_CONTROL              = 0x024,
+	SOCK_FIFO_PAGE_SIZE            = 0x028,
+	SOCK_MMCSD_COMMAND             = 0x104,
+	SOCK_MMCSD_ARG_LOW             = 0x108,
+	SOCK_MMCSD_ARG_HIGH            = 0x10c,
+	SOCK_MMCSD_CONFIG              = 0x110,
+	SOCK_MMCSD_STATUS              = 0x114,
+	SOCK_MMCSD_INT_ENABLE          = 0x118,
+	SOCK_MMCSD_COMMAND_TO          = 0x11c,
+	SOCK_MMCSD_DATA_TO             = 0x120,
+	SOCK_MMCSD_DATA                = 0x124,
+	SOCK_MMCSD_BLOCK_LEN           = 0x128,
+	SOCK_MMCSD_NUM_BLOCKS          = 0x12c,
+	SOCK_MMCSD_BUFFER_CONFIG       = 0x130,
+	SOCK_MMCSD_SPI_CONFIG          = 0x134,
+	SOCK_MMCSD_SDIO_MODE_CONFIG    = 0x138,
+	SOCK_MMCSD_RESPONSE            = 0x144,
+	SOCK_MMCSD_SDIO_SR             = 0x164,
+	SOCK_MMCSD_SYSTEM_CONTROL      = 0x168,
+	SOCK_MMCSD_SYSTEM_STATUS       = 0x16c,
+	SOCK_MS_COMMAND                = 0x184,
+	SOCK_MS_DATA                   = 0x188,
+	SOCK_MS_STATUS                 = 0x18c,
+	SOCK_MS_SYSTEM                 = 0x190,
+	SOCK_FIFO_ACCESS               = 0x200 };
+
+
+#define TIFM_IRQ_ENABLE           0x80000000
+#define TIFM_IRQ_SOCKMASK         0x00000001
+#define TIFM_IRQ_CARDMASK         0x00000100
+#define TIFM_IRQ_FIFOMASK         0x00010000
+#define TIFM_IRQ_SETALL           0xffffffff
+#define TIFM_IRQ_SETALLSOCK       0x0000000f
+
+#define TIFM_CTRL_LED             0x00000040
+#define TIFM_CTRL_FAST_CLK        0x00000100
+
+#define TIFM_SOCK_STATE_OCCUPIED  0x00000008
+#define TIFM_SOCK_STATE_POWERED   0x00000080
+
+#define TIFM_FIFO_ENABLE          0x00000001 /* Meaning of this constant is unverified */
+#define TIFM_FIFO_INT_SETALL      0x0000ffff
+#define TIFM_FIFO_INTMASK         0x00000005 /* Meaning of this constant is unverified */
+
+#define TIFM_DMA_RESET            0x00000002 /* Meaning of this constant is unverified */
+#define TIFM_DMA_TX               0x00008000 /* Meaning of this constant is unverified */
+#define TIFM_DMA_EN               0x00000001 /* Meaning of this constant is unverified */
+
+typedef enum {FM_NULL = 0, FM_XD = 0x01, FM_MS = 0x02, FM_SD = 0x03} tifm_media_id;
+
+struct tifm_driver;
+struct tifm_dev {
+	char __iomem            *addr;
+	spinlock_t              lock;
+	tifm_media_id           media_id;
+	char                    wq_name[KOBJ_NAME_LEN];
+	struct workqueue_struct *wq;
+
+	unsigned int            (*signal_irq)(struct tifm_dev *sock,
+					      unsigned int sock_irq_status);
+
+	struct tifm_driver      *drv;
+	struct device           dev;
+};
+
+struct tifm_driver {
+	tifm_media_id        *id_table;
+	int                  (*probe)(struct tifm_dev *dev);
+	void                 (*remove)(struct tifm_dev *dev);
+
+	struct device_driver driver;
+};
+
+struct tifm_adapter {
+	char __iomem            *addr;
+	unsigned int            irq_status;
+	unsigned int            insert_mask;
+	unsigned int            remove_mask;
+	spinlock_t              lock;
+	unsigned int            id;
+	unsigned int            max_sockets;
+	char                    wq_name[KOBJ_NAME_LEN];
+	unsigned int            inhibit_new_cards;
+	struct workqueue_struct *wq;
+	struct work_struct      media_inserter;
+	struct work_struct      media_remover;
+	struct tifm_dev         **sockets;
+	struct class_device     cdev;
+	struct device           *dev;
+
+	void                    (*eject)(struct tifm_adapter *fm, struct tifm_dev *sock);
+};
+
+struct tifm_adapter *tifm_alloc_adapter(void);
+void tifm_free_device(struct device *dev);
+void tifm_free_adapter(struct tifm_adapter *fm);
+int tifm_add_adapter(struct tifm_adapter *fm);
+void tifm_remove_adapter(struct tifm_adapter *fm);
+struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id);
+int tifm_register_driver(struct tifm_driver *drv);
+void tifm_unregister_driver(struct tifm_driver *drv);
+void tifm_eject(struct tifm_dev *sock);
+int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
+		int direction);
+void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
+		   int direction);
+
+
+static inline void *tifm_get_drvdata(struct tifm_dev *dev)
+{
+        return dev_get_drvdata(&dev->dev);
+}
+
+static inline void tifm_set_drvdata(struct tifm_dev *dev, void *data)
+{
+	dev_set_drvdata(&dev->dev, data);
+}
+
+struct tifm_device_id {
+	tifm_media_id media_id;
+};
+
+#endif