8e02f8581c
In order to support correct suspend and resume several changes were needed:
1. Switch from work_struct to tasklet for command handling. When device
suspend is called workqueues are already frozen and can not be used.
2. Separate host initialization code from driver's probe and don't rely
on interrupts for host initialization. This, in turn, addresses two
problems:
a) Resume needs to re-initialize the host, but can not assume that
device interrupts were already re-armed.
b) Previously, probe will return successfully before really knowing
the state of the host, as host interrupts were not armed in time.
Now it uses polling to determine the real host state before returning.
3. Separate termination code from driver's remove. Termination may be caused
by resume, if media changed type or became unavailable during suspend.
Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
159 lines
5.1 KiB
C
159 lines
5.1 KiB
C
/*
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* tifm.h - TI FlashMedia driver
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*
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* Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#ifndef _TIFM_H
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#define _TIFM_H
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/wait.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <linux/scatterlist.h>
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/* Host registers (relative to pci base address): */
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enum {
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FM_SET_INTERRUPT_ENABLE = 0x008,
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FM_CLEAR_INTERRUPT_ENABLE = 0x00c,
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FM_INTERRUPT_STATUS = 0x014 };
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/* Socket registers (relative to socket base address): */
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enum {
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SOCK_CONTROL = 0x004,
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SOCK_PRESENT_STATE = 0x008,
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SOCK_DMA_ADDRESS = 0x00c,
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SOCK_DMA_CONTROL = 0x010,
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SOCK_DMA_FIFO_INT_ENABLE_SET = 0x014,
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SOCK_DMA_FIFO_INT_ENABLE_CLEAR = 0x018,
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SOCK_DMA_FIFO_STATUS = 0x020,
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SOCK_FIFO_CONTROL = 0x024,
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SOCK_FIFO_PAGE_SIZE = 0x028,
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SOCK_MMCSD_COMMAND = 0x104,
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SOCK_MMCSD_ARG_LOW = 0x108,
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SOCK_MMCSD_ARG_HIGH = 0x10c,
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SOCK_MMCSD_CONFIG = 0x110,
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SOCK_MMCSD_STATUS = 0x114,
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SOCK_MMCSD_INT_ENABLE = 0x118,
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SOCK_MMCSD_COMMAND_TO = 0x11c,
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SOCK_MMCSD_DATA_TO = 0x120,
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SOCK_MMCSD_DATA = 0x124,
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SOCK_MMCSD_BLOCK_LEN = 0x128,
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SOCK_MMCSD_NUM_BLOCKS = 0x12c,
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SOCK_MMCSD_BUFFER_CONFIG = 0x130,
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SOCK_MMCSD_SPI_CONFIG = 0x134,
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SOCK_MMCSD_SDIO_MODE_CONFIG = 0x138,
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SOCK_MMCSD_RESPONSE = 0x144,
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SOCK_MMCSD_SDIO_SR = 0x164,
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SOCK_MMCSD_SYSTEM_CONTROL = 0x168,
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SOCK_MMCSD_SYSTEM_STATUS = 0x16c,
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SOCK_MS_COMMAND = 0x184,
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SOCK_MS_DATA = 0x188,
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SOCK_MS_STATUS = 0x18c,
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SOCK_MS_SYSTEM = 0x190,
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SOCK_FIFO_ACCESS = 0x200 };
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#define TIFM_IRQ_ENABLE 0x80000000
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#define TIFM_IRQ_SOCKMASK 0x00000001
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#define TIFM_IRQ_CARDMASK 0x00000100
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#define TIFM_IRQ_FIFOMASK 0x00010000
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#define TIFM_IRQ_SETALL 0xffffffff
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#define TIFM_IRQ_SETALLSOCK 0x0000000f
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#define TIFM_CTRL_LED 0x00000040
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#define TIFM_CTRL_FAST_CLK 0x00000100
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#define TIFM_SOCK_STATE_OCCUPIED 0x00000008
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#define TIFM_SOCK_STATE_POWERED 0x00000080
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#define TIFM_FIFO_ENABLE 0x00000001 /* Meaning of this constant is unverified */
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#define TIFM_FIFO_INT_SETALL 0x0000ffff
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#define TIFM_FIFO_INTMASK 0x00000005 /* Meaning of this constant is unverified */
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#define TIFM_DMA_RESET 0x00000002 /* Meaning of this constant is unverified */
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#define TIFM_DMA_TX 0x00008000 /* Meaning of this constant is unverified */
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#define TIFM_DMA_EN 0x00000001 /* Meaning of this constant is unverified */
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typedef enum {FM_NULL = 0, FM_XD = 0x01, FM_MS = 0x02, FM_SD = 0x03} tifm_media_id;
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struct tifm_driver;
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struct tifm_dev {
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char __iomem *addr;
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spinlock_t lock;
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tifm_media_id media_id;
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unsigned int socket_id;
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unsigned int (*signal_irq)(struct tifm_dev *sock,
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unsigned int sock_irq_status);
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struct tifm_driver *drv;
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struct device dev;
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};
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struct tifm_driver {
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tifm_media_id *id_table;
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int (*probe)(struct tifm_dev *dev);
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void (*remove)(struct tifm_dev *dev);
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struct device_driver driver;
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};
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struct tifm_adapter {
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char __iomem *addr;
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unsigned int irq_status;
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unsigned int insert_mask;
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unsigned int remove_mask;
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spinlock_t lock;
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unsigned int id;
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unsigned int max_sockets;
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char wq_name[KOBJ_NAME_LEN];
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unsigned int inhibit_new_cards;
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struct workqueue_struct *wq;
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struct work_struct media_inserter;
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struct work_struct media_remover;
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struct tifm_dev **sockets;
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struct class_device cdev;
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struct device *dev;
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void (*eject)(struct tifm_adapter *fm, struct tifm_dev *sock);
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};
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struct tifm_adapter *tifm_alloc_adapter(void);
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void tifm_free_device(struct device *dev);
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void tifm_free_adapter(struct tifm_adapter *fm);
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int tifm_add_adapter(struct tifm_adapter *fm);
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void tifm_remove_adapter(struct tifm_adapter *fm);
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struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm);
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int tifm_register_driver(struct tifm_driver *drv);
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void tifm_unregister_driver(struct tifm_driver *drv);
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void tifm_eject(struct tifm_dev *sock);
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int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
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int direction);
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void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
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int direction);
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static inline void *tifm_get_drvdata(struct tifm_dev *dev)
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{
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return dev_get_drvdata(&dev->dev);
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}
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static inline void tifm_set_drvdata(struct tifm_dev *dev, void *data)
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{
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dev_set_drvdata(&dev->dev, data);
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}
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struct tifm_device_id {
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tifm_media_id media_id;
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};
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#endif
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