pd6700.c

周立功magic2410实验箱源码 第6章Linux高级实验(part1) 6.1 Linux内核编译实验 6.2 Linux根文件系统实验 6.3 CAT1025读/写实验. 6.4 ZL

/****************************************Copyright (c)**************************************************
**                               Guangzhou ZHIYUAN electronics Co.,LTD.
**                                     
**                                 http://www.zyinside.com
**
**--------------File Info-------------------------------------------------------------------------------
** File Name: pd6700.c
** Last modified Date: 2006-01-14 
** Last Version: v1.0
** Description: 
** Note: 
**------------------------------------------------------------------------------------------------------
** Created By: 周立山
** Created date: 2006-01-01 
** Version: v1.0
** Descriptions:
**
**------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Description:
**
********************************************************************************************************/

#ifndef __KERNEL__
    #define __KERNEL__
#endif
#ifndef MODULE
    #define MODULE
#endif

#include <linux/module.h>
#include <linux/init.h>
#include <linux/config.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/timer.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/bitops.h>
#include <asm/segment.h>
#include <asm/system.h>

// PCMCIA相关头文件
#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <pcmcia/cs.h>

#include "pd6700.h"
#include <asm/hardware.h>
#define io_base(port)	(*(volatile u_char *)(vCF_IO_BASE + port))
//===========================================================================
#define PCMCIA_DEBUG 5									// 是否打印调试信息
//===========================================================================
#ifdef PCMCIA_DEBUG
	static int pc_debug = PCMCIA_DEBUG;
	MODULE_PARM(pc_debug, "i");
	#define DEBUG(n, args...)	\
		if (n <=  pc_debug) {	\
			printk(KERN_INFO args);	\
		}
	static const char *version ="pd6700.c 1.265 2005/12/08 zhoulishan";
#else
	#define DEBUG(n, args...)
#endif

/*====================================================================*/

/* Parameters that can be set with 'insmod' */

/* Default base address for pd6700sl and other ISA chips */
static int pd67_base = 0x3e0;
/* The card status change interrupt -- 0 means autoselect */
static int cs_irq = IRQ_nCF_INS;
/* Poll status interval -- 0 means default to interrupt */
static int poll_interval = 0;
/* External clock time, in nanoseconds.  120 ns = 8.33 MHz */
static int cycle_time = 120;

/* Cirrus options */
//#ifdef CONFIG_S3C2410_SMDK
static int has_led = -1;
static int has_ring = -1;
static int dynamic_mode = 1;
static int freq_bypass = 1;
static int setup_time = 5; /* 80ns (no spec) */
static int cmd_time = 20;  /* 320ns (by spec, 25Mhz clock) */
static int recov_time = 5; /* 80ns (no spec) */
static int wakeup = 0;


MODULE_PARM(pd67_base, "i");
MODULE_PARM(cs_irq, "i");
MODULE_PARM(wakeup, "i");
MODULE_PARM(poll_interval, "i");
MODULE_PARM(cycle_time, "i");
MODULE_PARM(has_led, "i");
MODULE_PARM(has_ring, "i");
MODULE_PARM(dynamic_mode, "i");
MODULE_PARM(freq_bypass, "i");
MODULE_PARM(setup_time, "i");
MODULE_PARM(cmd_time, "i");
MODULE_PARM(recov_time, "i");

/*====================================================================*/

typedef struct cirrus_state_t {			// PCMCIA接口状态数据结构
    u_char		misc1, misc2;
    u_char		timer[6];
} cirrus_state_t;

typedef struct socket_info_t {			// PCMCIA卡接口信息
    u_short		type, flags;					// 接口类型及标志位
    socket_cap_t	cap;							// PCMCIA接口能力
    ioaddr_t		ioaddr;							// IO 接口地址
    u_short		psock;								// 接口号
    u_char		cs_irq, intr;					// 中断号
    void		(*handler)(void *info, u_int events);	// 事件处理函数指针
    void		*info;									// 处理事件信息
#ifdef CONFIG_PROC_FS
    struct proc_dir_entry *proc;		// 处理入口指针
#endif
    union {
	cirrus_state_t		cirrus;					
		// 这里可以添加更多的桥芯片			
    } state;												// 状态
} socket_info_t;

/* Where we keep track of our sockets... */
static int sockets /* = 0 */;
static socket_info_t socket[8] /* = {
    { 0, },
} */;


#ifdef CONFIG_ISA
//	static int grab_irq;
	static spinlock_t isa_lock = SPIN_LOCK_UNLOCKED;
	#define ISA_LOCK(n, f) spin_lock_irqsave(&isa_lock, f)					// 关中断
	#define ISA_UNLOCK(n, f) spin_unlock_irqrestore(&isa_lock, f)   // 开中断
#else
	#define ISA_LOCK(n, f) do { } while (0)
	#define ISA_UNLOCK(n, f) do { } while (0)
#endif

static struct timer_list poll_timer;


/* These definitions must match the pcic table! */
typedef enum pcic_id {
    IS_PD6710, IS_PD6722, 
} pcic_id;


/* Flags for classifying groups of controllers */
#define IS_VADEM	0x0001
#define IS_CIRRUS	0x0002
#define IS_TI		0x0004
#define IS_O2MICRO	0x0008
#define IS_VIA		0x0010
#define IS_TOPIC	0x0020
#define IS_RICOH	0x0040
#define IS_UNKNOWN	0x0400
#define IS_VG_PWR	0x0800
#define IS_DF_PWR	0x1000
#define IS_PCI		0x2000
#define IS_ALIVE	0x8000

typedef struct pcic_t {
    char		*name;					// 控制器名称
    u_short		flags;				// 标志位
} pcic_t;

static pcic_t pcic[] = {
    { "Cirrus PD6710", IS_CIRRUS },
    { "Cirrus PD672x", IS_CIRRUS },
};

#define PCIC_COUNT	(sizeof(pcic)/sizeof(pcic_t))

/*====================================================================*/

static spinlock_t bus_lock = SPIN_LOCK_UNLOCKED;
/*********************************************************************************************************
** Function name: pd67_get
** Descriptions: 获取接口寄存器的值
** Input:sock,接口号
**  			reg,寄存器索引
** Output :
** Created by:
** Created Date: 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
static u_char pd67_get(u_short sock, u_short reg)
{
    unsigned long flags;
    spin_lock_irqsave(&bus_lock,flags);				// 关中断
    {
				ioaddr_t port = socket[sock].ioaddr;			// IO地址
				u_char val;
				reg = PD67_REG(socket[sock].psock, reg);	// 获取寄存器索引
			
				io_base(port) = (u_char) reg;							// 写寄存器地址
				val = io_base(port+1);										// 读寄存器值
			
				spin_unlock_irqrestore(&bus_lock,flags);		// 开中断
				return val;
    }
}
/*********************************************************************************************************
** Function name: pd67_set
** Descriptions: 写入指定寄存器的值
** Input:
** Output :
** Created by:
** Created Date: 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
static void pd67_set(u_short sock, u_short reg, u_char data)
{
    unsigned long flags;
    spin_lock_irqsave(&bus_lock,flags);
    {
				ioaddr_t port = socket[sock].ioaddr;
				u_char val = PD67_REG(socket[sock].psock, reg);
			
				io_base(port) = (u_char)val;
				io_base(port+1) = (u_char)data;
			
				spin_unlock_irqrestore(&bus_lock,flags);
    }
}
/*********************************************************************************************************
** Function name: pd67_bset
** Descriptions: 设置寄存器标记位.先读出寄存器的值,再将该值与mask求或，最后写入到寄存器
** Input:sock, 接口索引号
** 			 reg,寄存器索引号
**			 mask,屏蔽位
** Output : 无
** Created by:
** Created Date: 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
static void pd67_bset(u_short sock, u_short reg, u_char mask)
{
    u_char d = pd67_get(sock, reg);
    d |= mask;
    pd67_set(sock, reg, d);
}
/*********************************************************************************************************
** Function name: pd67_bclr
** Descriptions: 清零标志位,将寄存器中mask相应的位清零
** Input:sock, 接口索引号
** 			 reg,寄存器索引号
**			 mask,屏蔽位
** Output :
** Created by:
** Created Date: 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
static void pd67_bclr(u_short sock, u_short reg, u_char mask)
{
    u_char d = pd67_get(sock, reg);
    d &= ~mask;
    pd67_set(sock, reg, d);
}

/*********************************************************************************************************
** Function name: pd67_bflip
** Descriptions: 该函数集成了pd67_bset和pd67_bclr的功能，通过b的值选择相关的操作，b为0清标志位，反之置标志位
** Input:sock,接口索引
**			 reg, 寄存器索引
**			 mask, 屏蔽位
**			 b, 操作标志位
** Output : 无
** Created by:
** Created Date: 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
static void pd67_bflip(u_short sock, u_short reg, u_char mask, int b)
{
    u_char d = pd67_get(sock, reg);					// 读出寄存器原值
    if (b)	d |= mask;
    else		d &= ~mask;
    pd67_set(sock, reg, d);								// 写入寄存器
}
/*********************************************************************************************************
** Function name: pd67_get_pair
** Descriptions: 获取寄存器连续两个值,将寄存器reg和reg+1（高8位）组成一个16位的值，
** Input:sock , 接口号
**			 reg , 寄存器索引
** Output : 返回16位的值
** Created by:
** Created Date: 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------