761 lines
16 KiB
C
761 lines
16 KiB
C
/*
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* drivers/pcmcia/m32r_pcc.c
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*
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* Device driver for the PCMCIA functionality of M32R.
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*
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* Copyright (c) 2001, 2002, 2003, 2004
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* Hiroyuki Kondo, Naoto Sugai, Hayato Fujiwara
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/timer.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/workqueue.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/bitops.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include <asm/addrspace.h>
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#include <pcmcia/ss.h>
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/* XXX: should be moved into asm/irq.h */
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#define PCC0_IRQ 24
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#define PCC1_IRQ 25
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#include "m32r_pcc.h"
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#define CHAOS_PCC_DEBUG
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#ifdef CHAOS_PCC_DEBUG
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static volatile u_short dummy_readbuf;
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#endif
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#define PCC_DEBUG_DBEX
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/* Poll status interval -- 0 means default to interrupt */
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static int poll_interval = 0;
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typedef enum pcc_space { as_none = 0, as_comm, as_attr, as_io } pcc_as_t;
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typedef struct pcc_socket {
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u_short type, flags;
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struct pcmcia_socket socket;
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unsigned int number;
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unsigned int ioaddr;
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u_long mapaddr;
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u_long base; /* PCC register base */
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u_char cs_irq, intr;
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pccard_io_map io_map[MAX_IO_WIN];
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pccard_mem_map mem_map[MAX_WIN];
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u_char io_win;
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u_char mem_win;
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pcc_as_t current_space;
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u_char last_iodbex;
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#ifdef CHAOS_PCC_DEBUG
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u_char last_iosize;
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#endif
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#ifdef CONFIG_PROC_FS
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struct proc_dir_entry *proc;
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#endif
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} pcc_socket_t;
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static int pcc_sockets = 0;
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static pcc_socket_t socket[M32R_MAX_PCC] = {
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{ 0, }, /* ... */
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};
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/*====================================================================*/
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static unsigned int pcc_get(u_short, unsigned int);
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static void pcc_set(u_short, unsigned int , unsigned int );
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static DEFINE_SPINLOCK(pcc_lock);
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void pcc_iorw(int sock, unsigned long port, void *buf, size_t size, size_t nmemb, int wr, int flag)
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{
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u_long addr;
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u_long flags;
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int need_ex;
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#ifdef PCC_DEBUG_DBEX
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int _dbex;
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#endif
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pcc_socket_t *t = &socket[sock];
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#ifdef CHAOS_PCC_DEBUG
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int map_changed = 0;
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#endif
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/* Need lock ? */
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spin_lock_irqsave(&pcc_lock, flags);
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/*
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* Check if need dbex
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*/
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need_ex = (size > 1 && flag == 0) ? PCMOD_DBEX : 0;
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#ifdef PCC_DEBUG_DBEX
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_dbex = need_ex;
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need_ex = 0;
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#endif
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/*
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* calculate access address
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*/
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addr = t->mapaddr + port - t->ioaddr + KSEG1; /* XXX */
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/*
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* Check current mapping
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*/
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if (t->current_space != as_io || t->last_iodbex != need_ex) {
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u_long cbsz;
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/*
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* Disable first
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*/
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pcc_set(sock, PCCR, 0);
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/*
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* Set mode and io address
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*/
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cbsz = (t->flags & MAP_16BIT) ? 0 : PCMOD_CBSZ;
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pcc_set(sock, PCMOD, PCMOD_AS_IO | cbsz | need_ex);
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pcc_set(sock, PCADR, addr & 0x1ff00000);
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/*
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* Enable and read it
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*/
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pcc_set(sock, PCCR, 1);
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#ifdef CHAOS_PCC_DEBUG
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#if 0
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map_changed = (t->current_space == as_attr && size == 2); /* XXX */
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#else
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map_changed = 1;
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#endif
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#endif
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t->current_space = as_io;
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}
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/*
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* access to IO space
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*/
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if (size == 1) {
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/* Byte */
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unsigned char *bp = (unsigned char *)buf;
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#ifdef CHAOS_DEBUG
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if (map_changed) {
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dummy_readbuf = readb(addr);
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}
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#endif
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if (wr) {
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/* write Byte */
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while (nmemb--) {
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writeb(*bp++, addr);
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}
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} else {
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/* read Byte */
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while (nmemb--) {
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*bp++ = readb(addr);
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}
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}
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} else {
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/* Word */
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unsigned short *bp = (unsigned short *)buf;
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#ifdef CHAOS_PCC_DEBUG
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if (map_changed) {
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dummy_readbuf = readw(addr);
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}
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#endif
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if (wr) {
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/* write Word */
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while (nmemb--) {
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#ifdef PCC_DEBUG_DBEX
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if (_dbex) {
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unsigned char *cp = (unsigned char *)bp;
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unsigned short tmp;
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tmp = cp[1] << 8 | cp[0];
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writew(tmp, addr);
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bp++;
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} else
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#endif
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writew(*bp++, addr);
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}
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} else {
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/* read Word */
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while (nmemb--) {
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#ifdef PCC_DEBUG_DBEX
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if (_dbex) {
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unsigned char *cp = (unsigned char *)bp;
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unsigned short tmp;
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tmp = readw(addr);
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cp[0] = tmp & 0xff;
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cp[1] = (tmp >> 8) & 0xff;
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bp++;
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} else
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#endif
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*bp++ = readw(addr);
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}
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}
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}
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#if 1
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/* addr is no longer used */
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if ((addr = pcc_get(sock, PCIRC)) & PCIRC_BWERR) {
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printk("m32r_pcc: BWERR detected : port 0x%04lx : iosize %dbit\n",
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port, size * 8);
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pcc_set(sock, PCIRC, addr);
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}
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#endif
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/*
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* save state
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*/
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t->last_iosize = size;
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t->last_iodbex = need_ex;
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/* Need lock ? */
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spin_unlock_irqrestore(&pcc_lock,flags);
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return;
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}
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void pcc_ioread(int sock, unsigned long port, void *buf, size_t size, size_t nmemb, int flag) {
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pcc_iorw(sock, port, buf, size, nmemb, 0, flag);
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}
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void pcc_iowrite(int sock, unsigned long port, void *buf, size_t size, size_t nmemb, int flag) {
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pcc_iorw(sock, port, buf, size, nmemb, 1, flag);
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}
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/*====================================================================*/
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#define IS_REGISTERED 0x2000
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#define IS_ALIVE 0x8000
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typedef struct pcc_t {
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char *name;
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u_short flags;
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} pcc_t;
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static pcc_t pcc[] = {
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{ "xnux2", 0 }, { "xnux2", 0 },
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};
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static irqreturn_t pcc_interrupt(int, void *);
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/*====================================================================*/
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static struct timer_list poll_timer;
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static unsigned int pcc_get(u_short sock, unsigned int reg)
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{
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return inl(socket[sock].base + reg);
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}
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static void pcc_set(u_short sock, unsigned int reg, unsigned int data)
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{
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outl(data, socket[sock].base + reg);
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}
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/*======================================================================
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See if a card is present, powered up, in IO mode, and already
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bound to a (non PC Card) Linux driver. We leave these alone.
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We make an exception for cards that seem to be serial devices.
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======================================================================*/
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static int __init is_alive(u_short sock)
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{
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unsigned int stat;
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unsigned int f;
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stat = pcc_get(sock, PCIRC);
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f = (stat & (PCIRC_CDIN1 | PCIRC_CDIN2)) >> 16;
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if(!f){
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printk("m32r_pcc: No Card is detected at socket %d : stat = 0x%08x\n",stat,sock);
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return 0;
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}
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if(f!=3)
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printk("m32r_pcc: Insertion fail (%.8x) at socket %d\n",stat,sock);
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else
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printk("m32r_pcc: Card is Inserted at socket %d(%.8x)\n",sock,stat);
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return 0;
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}
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static void add_pcc_socket(ulong base, int irq, ulong mapaddr,
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unsigned int ioaddr)
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{
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pcc_socket_t *t = &socket[pcc_sockets];
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/* add sockets */
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t->ioaddr = ioaddr;
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t->mapaddr = mapaddr;
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t->base = base;
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#ifdef CHAOS_PCC_DEBUG
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t->flags = MAP_16BIT;
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#else
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t->flags = 0;
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#endif
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if (is_alive(pcc_sockets))
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t->flags |= IS_ALIVE;
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/* add pcc */
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if (t->base > 0) {
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request_region(t->base, 0x20, "m32r-pcc");
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}
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printk(KERN_INFO " %s ", pcc[pcc_sockets].name);
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printk("pcc at 0x%08lx\n", t->base);
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/* Update socket interrupt information, capabilities */
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t->socket.features |= (SS_CAP_PCCARD | SS_CAP_STATIC_MAP);
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t->socket.map_size = M32R_PCC_MAPSIZE;
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t->socket.io_offset = ioaddr; /* use for io access offset */
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t->socket.irq_mask = 0;
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t->socket.pci_irq = 2 + pcc_sockets; /* XXX */
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request_irq(irq, pcc_interrupt, 0, "m32r-pcc", pcc_interrupt);
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pcc_sockets++;
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return;
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}
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/*====================================================================*/
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static irqreturn_t pcc_interrupt(int irq, void *dev)
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{
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int i, j, irc;
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u_int events, active;
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int handled = 0;
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pr_debug("m32r_pcc: pcc_interrupt(%d)\n", irq);
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for (j = 0; j < 20; j++) {
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active = 0;
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for (i = 0; i < pcc_sockets; i++) {
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if ((socket[i].cs_irq != irq) &&
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(socket[i].socket.pci_irq != irq))
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continue;
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handled = 1;
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irc = pcc_get(i, PCIRC);
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irc >>=16;
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pr_debug("m32r_pcc: interrupt: socket %d pcirc 0x%02x ",
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i, irc);
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if (!irc)
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continue;
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events = (irc) ? SS_DETECT : 0;
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events |= (pcc_get(i,PCCR) & PCCR_PCEN) ? SS_READY : 0;
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pr_debug("m32r_pcc: event 0x%02x\n", events);
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if (events)
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pcmcia_parse_events(&socket[i].socket, events);
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active |= events;
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active = 0;
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}
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if (!active) break;
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}
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if (j == 20)
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printk(KERN_NOTICE "m32r-pcc: infinite loop in interrupt handler\n");
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pr_debug("m32r_pcc: interrupt done\n");
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return IRQ_RETVAL(handled);
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} /* pcc_interrupt */
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static void pcc_interrupt_wrapper(u_long data)
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{
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pcc_interrupt(0, NULL);
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init_timer(&poll_timer);
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poll_timer.expires = jiffies + poll_interval;
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add_timer(&poll_timer);
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}
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/*====================================================================*/
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static int _pcc_get_status(u_short sock, u_int *value)
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{
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u_int status;
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status = pcc_get(sock,PCIRC);
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*value = ((status & PCIRC_CDIN1) && (status & PCIRC_CDIN2))
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? SS_DETECT : 0;
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status = pcc_get(sock,PCCR);
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#if 0
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*value |= (status & PCCR_PCEN) ? SS_READY : 0;
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#else
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*value |= SS_READY; /* XXX: always */
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#endif
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status = pcc_get(sock,PCCSIGCR);
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*value |= (status & PCCSIGCR_VEN) ? SS_POWERON : 0;
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pr_debug("m32r_pcc: GetStatus(%d) = %#4.4x\n", sock, *value);
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return 0;
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} /* _get_status */
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/*====================================================================*/
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static int _pcc_set_socket(u_short sock, socket_state_t *state)
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{
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u_long reg = 0;
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pr_debug("m32r_pcc: SetSocket(%d, flags %#3.3x, Vcc %d, Vpp %d, "
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"io_irq %d, csc_mask %#2.2x)", sock, state->flags,
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state->Vcc, state->Vpp, state->io_irq, state->csc_mask);
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if (state->Vcc) {
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/*
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* 5V only
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*/
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if (state->Vcc == 50) {
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reg |= PCCSIGCR_VEN;
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} else {
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return -EINVAL;
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}
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}
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if (state->flags & SS_RESET) {
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pr_debug("m32r_pcc: :RESET\n");
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reg |= PCCSIGCR_CRST;
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}
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if (state->flags & SS_OUTPUT_ENA){
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pr_debug("m32r_pcc: :OUTPUT_ENA\n");
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/* bit clear */
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} else {
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reg |= PCCSIGCR_SEN;
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}
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pcc_set(sock,PCCSIGCR,reg);
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if(state->flags & SS_IOCARD){
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pr_debug("m32r_pcc: :IOCARD");
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}
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if (state->flags & SS_PWR_AUTO) {
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pr_debug("m32r_pcc: :PWR_AUTO");
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}
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if (state->csc_mask & SS_DETECT)
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pr_debug("m32r_pcc: :csc-SS_DETECT");
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if (state->flags & SS_IOCARD) {
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if (state->csc_mask & SS_STSCHG)
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pr_debug("m32r_pcc: :STSCHG");
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} else {
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if (state->csc_mask & SS_BATDEAD)
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pr_debug("m32r_pcc: :BATDEAD");
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if (state->csc_mask & SS_BATWARN)
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pr_debug("m32r_pcc: :BATWARN");
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if (state->csc_mask & SS_READY)
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pr_debug("m32r_pcc: :READY");
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}
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pr_debug("m32r_pcc: \n");
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return 0;
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} /* _set_socket */
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/*====================================================================*/
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static int _pcc_set_io_map(u_short sock, struct pccard_io_map *io)
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{
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u_char map;
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pr_debug("m32r_pcc: SetIOMap(%d, %d, %#2.2x, %d ns, "
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"%#llx-%#llx)\n", sock, io->map, io->flags,
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io->speed, (unsigned long long)io->start,
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(unsigned long long)io->stop);
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map = io->map;
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return 0;
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} /* _set_io_map */
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/*====================================================================*/
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static int _pcc_set_mem_map(u_short sock, struct pccard_mem_map *mem)
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{
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u_char map = mem->map;
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u_long mode;
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u_long addr;
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pcc_socket_t *t = &socket[sock];
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#ifdef CHAOS_PCC_DEBUG
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#if 0
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pcc_as_t last = t->current_space;
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#endif
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#endif
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pr_debug("m32r_pcc: SetMemMap(%d, %d, %#2.2x, %d ns, "
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"%#llx, %#x)\n", sock, map, mem->flags,
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mem->speed, (unsigned long long)mem->static_start,
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mem->card_start);
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/*
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* sanity check
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*/
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if ((map > MAX_WIN) || (mem->card_start > 0x3ffffff)){
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return -EINVAL;
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}
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/*
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* de-activate
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*/
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if ((mem->flags & MAP_ACTIVE) == 0) {
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t->current_space = as_none;
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return 0;
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}
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/*
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* Disable first
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*/
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pcc_set(sock, PCCR, 0);
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/*
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* Set mode
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*/
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if (mem->flags & MAP_ATTRIB) {
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mode = PCMOD_AS_ATTRIB | PCMOD_CBSZ;
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t->current_space = as_attr;
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} else {
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mode = 0; /* common memory */
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t->current_space = as_comm;
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}
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pcc_set(sock, PCMOD, mode);
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/*
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* Set address
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*/
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addr = t->mapaddr + (mem->card_start & M32R_PCC_MAPMASK);
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pcc_set(sock, PCADR, addr);
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mem->static_start = addr + mem->card_start;
|
|
|
|
/*
|
|
* Enable again
|
|
*/
|
|
pcc_set(sock, PCCR, 1);
|
|
|
|
#ifdef CHAOS_PCC_DEBUG
|
|
#if 0
|
|
if (last != as_attr) {
|
|
#else
|
|
if (1) {
|
|
#endif
|
|
dummy_readbuf = *(u_char *)(addr + KSEG1);
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
|
|
} /* _set_mem_map */
|
|
|
|
#if 0 /* driver model ordering issue */
|
|
/*======================================================================
|
|
|
|
Routines for accessing socket information and register dumps via
|
|
/proc/bus/pccard/...
|
|
|
|
======================================================================*/
|
|
|
|
static ssize_t show_info(struct class_device *class_dev, char *buf)
|
|
{
|
|
pcc_socket_t *s = container_of(class_dev, struct pcc_socket,
|
|
socket.dev);
|
|
|
|
return sprintf(buf, "type: %s\nbase addr: 0x%08lx\n",
|
|
pcc[s->type].name, s->base);
|
|
}
|
|
|
|
static ssize_t show_exca(struct class_device *class_dev, char *buf)
|
|
{
|
|
/* FIXME */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static CLASS_DEVICE_ATTR(info, S_IRUGO, show_info, NULL);
|
|
static CLASS_DEVICE_ATTR(exca, S_IRUGO, show_exca, NULL);
|
|
#endif
|
|
|
|
/*====================================================================*/
|
|
|
|
/* this is horribly ugly... proper locking needs to be done here at
|
|
* some time... */
|
|
#define LOCKED(x) do { \
|
|
int retval; \
|
|
unsigned long flags; \
|
|
spin_lock_irqsave(&pcc_lock, flags); \
|
|
retval = x; \
|
|
spin_unlock_irqrestore(&pcc_lock, flags); \
|
|
return retval; \
|
|
} while (0)
|
|
|
|
|
|
static int pcc_get_status(struct pcmcia_socket *s, u_int *value)
|
|
{
|
|
unsigned int sock = container_of(s, struct pcc_socket, socket)->number;
|
|
|
|
if (socket[sock].flags & IS_ALIVE) {
|
|
*value = 0;
|
|
return -EINVAL;
|
|
}
|
|
LOCKED(_pcc_get_status(sock, value));
|
|
}
|
|
|
|
static int pcc_set_socket(struct pcmcia_socket *s, socket_state_t *state)
|
|
{
|
|
unsigned int sock = container_of(s, struct pcc_socket, socket)->number;
|
|
|
|
if (socket[sock].flags & IS_ALIVE)
|
|
return -EINVAL;
|
|
|
|
LOCKED(_pcc_set_socket(sock, state));
|
|
}
|
|
|
|
static int pcc_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
|
|
{
|
|
unsigned int sock = container_of(s, struct pcc_socket, socket)->number;
|
|
|
|
if (socket[sock].flags & IS_ALIVE)
|
|
return -EINVAL;
|
|
LOCKED(_pcc_set_io_map(sock, io));
|
|
}
|
|
|
|
static int pcc_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *mem)
|
|
{
|
|
unsigned int sock = container_of(s, struct pcc_socket, socket)->number;
|
|
|
|
if (socket[sock].flags & IS_ALIVE)
|
|
return -EINVAL;
|
|
LOCKED(_pcc_set_mem_map(sock, mem));
|
|
}
|
|
|
|
static int pcc_init(struct pcmcia_socket *s)
|
|
{
|
|
pr_debug("m32r_pcc: init call\n");
|
|
return 0;
|
|
}
|
|
|
|
static struct pccard_operations pcc_operations = {
|
|
.init = pcc_init,
|
|
.get_status = pcc_get_status,
|
|
.set_socket = pcc_set_socket,
|
|
.set_io_map = pcc_set_io_map,
|
|
.set_mem_map = pcc_set_mem_map,
|
|
};
|
|
|
|
/*====================================================================*/
|
|
|
|
static struct platform_driver pcc_driver = {
|
|
.driver = {
|
|
.name = "pcc",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static struct platform_device pcc_device = {
|
|
.name = "pcc",
|
|
.id = 0,
|
|
};
|
|
|
|
/*====================================================================*/
|
|
|
|
static int __init init_m32r_pcc(void)
|
|
{
|
|
int i, ret;
|
|
|
|
ret = platform_driver_register(&pcc_driver);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = platform_device_register(&pcc_device);
|
|
if (ret){
|
|
platform_driver_unregister(&pcc_driver);
|
|
return ret;
|
|
}
|
|
|
|
printk(KERN_INFO "m32r PCC probe:\n");
|
|
|
|
pcc_sockets = 0;
|
|
|
|
add_pcc_socket(M32R_PCC0_BASE, PCC0_IRQ, M32R_PCC0_MAPBASE, 0x1000);
|
|
|
|
#ifdef CONFIG_M32RPCC_SLOT2
|
|
add_pcc_socket(M32R_PCC1_BASE, PCC1_IRQ, M32R_PCC1_MAPBASE, 0x2000);
|
|
#endif
|
|
|
|
if (pcc_sockets == 0) {
|
|
printk("socket is not found.\n");
|
|
platform_device_unregister(&pcc_device);
|
|
platform_driver_unregister(&pcc_driver);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Set up interrupt handler(s) */
|
|
|
|
for (i = 0 ; i < pcc_sockets ; i++) {
|
|
socket[i].socket.dev.parent = &pcc_device.dev;
|
|
socket[i].socket.ops = &pcc_operations;
|
|
socket[i].socket.resource_ops = &pccard_static_ops;
|
|
socket[i].socket.owner = THIS_MODULE;
|
|
socket[i].number = i;
|
|
ret = pcmcia_register_socket(&socket[i].socket);
|
|
if (!ret)
|
|
socket[i].flags |= IS_REGISTERED;
|
|
|
|
#if 0 /* driver model ordering issue */
|
|
class_device_create_file(&socket[i].socket.dev,
|
|
&class_device_attr_info);
|
|
class_device_create_file(&socket[i].socket.dev,
|
|
&class_device_attr_exca);
|
|
#endif
|
|
}
|
|
|
|
/* Finally, schedule a polling interrupt */
|
|
if (poll_interval != 0) {
|
|
poll_timer.function = pcc_interrupt_wrapper;
|
|
poll_timer.data = 0;
|
|
init_timer(&poll_timer);
|
|
poll_timer.expires = jiffies + poll_interval;
|
|
add_timer(&poll_timer);
|
|
}
|
|
|
|
return 0;
|
|
} /* init_m32r_pcc */
|
|
|
|
static void __exit exit_m32r_pcc(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < pcc_sockets; i++)
|
|
if (socket[i].flags & IS_REGISTERED)
|
|
pcmcia_unregister_socket(&socket[i].socket);
|
|
|
|
platform_device_unregister(&pcc_device);
|
|
if (poll_interval != 0)
|
|
del_timer_sync(&poll_timer);
|
|
|
|
platform_driver_unregister(&pcc_driver);
|
|
} /* exit_m32r_pcc */
|
|
|
|
module_init(init_m32r_pcc);
|
|
module_exit(exit_m32r_pcc);
|
|
MODULE_LICENSE("Dual MPL/GPL");
|
|
/*====================================================================*/
|