path: root/drivers/pcmcia/m32r_cfc.c

/*
 *  drivers/pcmcia/m32r_cfc.c
 *
 *  Device driver for the CFC functionality of M32R.
 *
 *  Copyright (c) 2001, 2002, 2003, 2004
 *    Hiroyuki Kondo, Naoto Sugai, Hayato Fujiwara
 */

#include <linux/module.h>
#include <linux/moduleparam.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/workqueue.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/bitops.h>
#include <asm/system.h>

#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <pcmcia/cs.h>

#undef MAX_IO_WIN	/* FIXME */
#define MAX_IO_WIN 1
#undef MAX_WIN		/* FIXME */
#define MAX_WIN 1

#include "m32r_cfc.h"

#ifdef DEBUG
static int m32r_cfc_debug;
module_param(m32r_cfc_debug, int, 0644);
#define debug(lvl, fmt, arg...) do {				\
	if (m32r_cfc_debug > (lvl))				\
		printk(KERN_DEBUG "m32r_cfc: " fmt , ## arg);	\
} while (0)
#else
#define debug(n, args...) do { } while (0)
#endif

/* Poll status interval -- 0 means default to interrupt */
static int poll_interval = 0;

typedef enum pcc_space { as_none = 0, as_comm, as_attr, as_io } pcc_as_t;

typedef struct pcc_socket {
	u_short			type, flags;
	struct pcmcia_socket	socket;
	unsigned int		number;
 	kio_addr_t		ioaddr;
	u_long			mapaddr;
	u_long			base;	/* PCC register base */
	u_char			cs_irq1, cs_irq2, intr;
	pccard_io_map		io_map[MAX_IO_WIN];
	pccard_mem_map		mem_map[MAX_WIN];
	u_char			io_win;
	u_char			mem_win;
	pcc_as_t		current_space;
	u_char			last_iodbex;
#ifdef CONFIG_PROC_FS
	struct proc_dir_entry *proc;
#endif
} pcc_socket_t;

static int pcc_sockets = 0;
static pcc_socket_t socket[M32R_MAX_PCC] = {
	{ 0, }, /* ... */
};

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

static unsigned int pcc_get(u_short, unsigned int);
static void pcc_set(u_short, unsigned int , unsigned int );

static DEFINE_SPINLOCK(pcc_lock);

#if !defined(CONFIG_PLAT_USRV)
static inline u_long pcc_port2addr(unsigned long port, int size) {
	u_long addr = 0;
	u_long odd;

	if (size == 1) {	/* byte access */
		odd = (port&1) << 11;
		port -= port & 1;
		addr = CFC_IO_MAPBASE_BYTE - CFC_IOPORT_BASE + odd + port;
	} else if (size == 2)
		addr = CFC_IO_MAPBASE_WORD - CFC_IOPORT_BASE + port;

	return addr;
}
#else	/* CONFIG_PLAT_USRV */
static inline u_long pcc_port2addr(unsigned long port, int size) {
	u_long odd;
	u_long addr = ((port - CFC_IOPORT_BASE) & 0xf000) << 8;

	if (size == 1) {	/* byte access */
		odd = port & 1;
		port -= odd;
		odd <<= 11;
		addr = (addr | CFC_IO_MAPBASE_BYTE) + odd + (port & 0xfff);
	} else if (size == 2)	/* word access */
		addr = (addr | CFC_IO_MAPBASE_WORD) + (port & 0xfff);

	return addr;
}
#endif	/* CONFIG_PLAT_USRV */

void pcc_ioread_byte(int sock, unsigned long port, void *buf, size_t size,
	size_t nmemb, int flag)
{
	u_long addr;
	unsigned char *bp = (unsigned char *)buf;
	unsigned long flags;

	debug(3, "m32r_cfc: pcc_ioread_byte: sock=%d, port=%#lx, buf=%p, "
		 "size=%u, nmemb=%d, flag=%d\n",
		  sock, port, buf, size, nmemb, flag);

	addr = pcc_port2addr(port, 1);
	if (!addr) {
		printk("m32r_cfc:ioread_byte null port :%#lx\n",port);
		return;
	}
	debug(3, "m32r_cfc: pcc_ioread_byte: addr=%#lx\n", addr);

	spin_lock_irqsave(&pcc_lock, flags);
	/* read Byte */
	while (nmemb--)
		*bp++ = readb(addr);
	spin_unlock_irqrestore(&pcc_lock, flags);
}

void pcc_ioread_word(int sock, unsigned long port, void *buf, size_t size,
	size_t nmemb, int flag)
{
	u_long addr;
	unsigned short *bp = (unsigned short *)buf;
	unsigned long flags;

	debug(3, "m32r_cfc: pcc_ioread_word: sock=%d, port=%#lx, "
		 "buf=%p, size=%u, nmemb=%d, flag=%d\n",
		 sock, port, buf, size, nmemb, flag);

	if (size != 2)
		printk("m32r_cfc: ioread_word :illigal size %u : %#lx\n", size,
			port);
	if (size == 9)
		printk("m32r_cfc: ioread_word :insw \n");

	addr = pcc_port2addr(port, 2);
	if (!addr) {
		printk("m32r_cfc:ioread_word null port :%#lx\n",port);
		return;
	}
	debug(3,