851 lines
19 KiB
C
851 lines
19 KiB
C
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/*
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* linux/arch/arm26/kernel/ecard.c
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*
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* Copyright 1995-2001 Russell King
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* Copyright 2003 Ian Molton
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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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* Find all installed expansion cards, and handle interrupts from them.
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*
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* Created from information from Acorns RiscOS3 PRMs
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* 15-Jun-2003 IM Modified from ARM32 (RiscPC capable) version
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* 10-Jan-1999 RMK Run loaders in a simulated RISC OS environment.
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* 06-May-1997 RMK Added blacklist for cards whose loader doesn't work.
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* 12-Sep-1997 RMK Created new handling of interrupt enables/disables
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* - cards can now register their own routine to control
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* interrupts (recommended).
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* 29-Sep-1997 RMK Expansion card interrupt hardware not being re-enabled
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* on reset from Linux. (Caused cards not to respond
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* under RiscOS without hard reset).
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*
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*/
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#define ECARD_C
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/reboot.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/proc_fs.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <asm/dma.h>
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#include <asm/ecard.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/mmu_context.h>
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#include <asm/irqchip.h>
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#include <asm/tlbflush.h>
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enum req {
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req_readbytes,
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req_reset
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};
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struct ecard_request {
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enum req req;
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ecard_t *ec;
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unsigned int address;
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unsigned int length;
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unsigned int use_loader;
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void *buffer;
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};
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struct expcard_blacklist {
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unsigned short manufacturer;
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unsigned short product;
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const char *type;
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};
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static ecard_t *cards;
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static ecard_t *slot_to_expcard[MAX_ECARDS];
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static unsigned int ectcr;
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/* List of descriptions of cards which don't have an extended
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* identification, or chunk directories containing a description.
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*/
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static struct expcard_blacklist __initdata blacklist[] = {
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{ MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" }
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};
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asmlinkage extern int
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ecard_loader_reset(volatile unsigned char *pa, loader_t loader);
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asmlinkage extern int
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ecard_loader_read(int off, volatile unsigned char *pa, loader_t loader);
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static const struct ecard_id *
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ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec);
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static inline unsigned short
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ecard_getu16(unsigned char *v)
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{
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return v[0] | v[1] << 8;
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}
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static inline signed long
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ecard_gets24(unsigned char *v)
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{
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return v[0] | v[1] << 8 | v[2] << 16 | ((v[2] & 0x80) ? 0xff000000 : 0);
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}
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static inline ecard_t *
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slot_to_ecard(unsigned int slot)
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{
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return slot < MAX_ECARDS ? slot_to_expcard[slot] : NULL;
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}
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/* ===================== Expansion card daemon ======================== */
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/*
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* Since the loader programs on the expansion cards need to be run
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* in a specific environment, create a separate task with this
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* environment up, and pass requests to this task as and when we
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* need to.
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*
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* This should allow 99% of loaders to be called from Linux.
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*
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* From a security standpoint, we trust the card vendors. This
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* may be a misplaced trust.
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*/
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#define BUS_ADDR(x) ((((unsigned long)(x)) << 2) + IO_BASE)
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#define POD_INT_ADDR(x) ((volatile unsigned char *)\
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((BUS_ADDR((x)) - IO_BASE) + IO_START))
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static inline void ecard_task_reset(struct ecard_request *req)
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{
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struct expansion_card *ec = req->ec;
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if (ec->loader)
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ecard_loader_reset(POD_INT_ADDR(ec->podaddr), ec->loader);
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}
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static void
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ecard_task_readbytes(struct ecard_request *req)
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{
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unsigned char *buf = (unsigned char *)req->buffer;
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volatile unsigned char *base_addr =
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(volatile unsigned char *)POD_INT_ADDR(req->ec->podaddr);
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unsigned int len = req->length;
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unsigned int off = req->address;
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if (!req->use_loader || !req->ec->loader) {
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off *= 4;
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while (len--) {
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*buf++ = base_addr[off];
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off += 4;
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}
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} else {
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while(len--) {
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/*
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* The following is required by some
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* expansion card loader programs.
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*/
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*(unsigned long *)0x108 = 0;
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*buf++ = ecard_loader_read(off++, base_addr,
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req->ec->loader);
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}
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}
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}
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static void ecard_do_request(struct ecard_request *req)
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{
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switch (req->req) {
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case req_readbytes:
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ecard_task_readbytes(req);
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break;
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case req_reset:
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ecard_task_reset(req);
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break;
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}
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}
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/*
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* On 26-bit processors, we don't need the kcardd thread to access the
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* expansion card loaders. We do it directly.
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*/
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#define ecard_call(req) ecard_do_request(req)
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/* ======================= Mid-level card control ===================== */
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static void
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ecard_readbytes(void *addr, ecard_t *ec, int off, int len, int useld)
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{
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struct ecard_request req;
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req.req = req_readbytes;
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req.ec = ec;
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req.address = off;
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req.length = len;
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req.use_loader = useld;
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req.buffer = addr;
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ecard_call(&req);
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}
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int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num)
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{
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struct ex_chunk_dir excd;
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int index = 16;
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int useld = 0;
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if (!ec->cid.cd)
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return 0;
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while(1) {
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ecard_readbytes(&excd, ec, index, 8, useld);
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index += 8;
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if (c_id(&excd) == 0) {
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if (!useld && ec->loader) {
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useld = 1;
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index = 0;
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continue;
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}
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return 0;
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}
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if (c_id(&excd) == 0xf0) { /* link */
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index = c_start(&excd);
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continue;
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}
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if (c_id(&excd) == 0x80) { /* loader */
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if (!ec->loader) {
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ec->loader = (loader_t)kmalloc(c_len(&excd),
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GFP_KERNEL);
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if (ec->loader)
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ecard_readbytes(ec->loader, ec,
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(int)c_start(&excd),
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c_len(&excd), useld);
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else
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return 0;
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}
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continue;
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}
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if (c_id(&excd) == id && num-- == 0)
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break;
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}
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if (c_id(&excd) & 0x80) {
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switch (c_id(&excd) & 0x70) {
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case 0x70:
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ecard_readbytes((unsigned char *)excd.d.string, ec,
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(int)c_start(&excd), c_len(&excd),
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useld);
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break;
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case 0x00:
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break;
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}
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}
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cd->start_offset = c_start(&excd);
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memcpy(cd->d.string, excd.d.string, 256);
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return 1;
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}
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/* ======================= Interrupt control ============================ */
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static void ecard_def_irq_enable(ecard_t *ec, int irqnr)
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{
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}
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static void ecard_def_irq_disable(ecard_t *ec, int irqnr)
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{
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}
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static int ecard_def_irq_pending(ecard_t *ec)
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{
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return !ec->irqmask || ec->irqaddr[0] & ec->irqmask;
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}
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static void ecard_def_fiq_enable(ecard_t *ec, int fiqnr)
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{
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panic("ecard_def_fiq_enable called - impossible");
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}
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static void ecard_def_fiq_disable(ecard_t *ec, int fiqnr)
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{
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panic("ecard_def_fiq_disable called - impossible");
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}
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static int ecard_def_fiq_pending(ecard_t *ec)
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{
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return !ec->fiqmask || ec->fiqaddr[0] & ec->fiqmask;
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}
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static expansioncard_ops_t ecard_default_ops = {
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ecard_def_irq_enable,
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ecard_def_irq_disable,
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ecard_def_irq_pending,
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ecard_def_fiq_enable,
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ecard_def_fiq_disable,
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ecard_def_fiq_pending
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};
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/*
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* Enable and disable interrupts from expansion cards.
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* (interrupts are disabled for these functions).
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*
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* They are not meant to be called directly, but via enable/disable_irq.
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*/
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static void ecard_irq_unmask(unsigned int irqnr)
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{
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ecard_t *ec = slot_to_ecard(irqnr - 32);
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if (ec) {
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if (!ec->ops)
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ec->ops = &ecard_default_ops;
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if (ec->claimed && ec->ops->irqenable)
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ec->ops->irqenable(ec, irqnr);
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else
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printk(KERN_ERR "ecard: rejecting request to "
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"enable IRQs for %d\n", irqnr);
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}
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}
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static void ecard_irq_mask(unsigned int irqnr)
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{
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ecard_t *ec = slot_to_ecard(irqnr - 32);
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if (ec) {
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if (!ec->ops)
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ec->ops = &ecard_default_ops;
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if (ec->ops && ec->ops->irqdisable)
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ec->ops->irqdisable(ec, irqnr);
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}
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}
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static struct irqchip ecard_chip = {
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.ack = ecard_irq_mask,
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.mask = ecard_irq_mask,
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.unmask = ecard_irq_unmask,
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};
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void ecard_enablefiq(unsigned int fiqnr)
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{
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ecard_t *ec = slot_to_ecard(fiqnr);
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if (ec) {
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if (!ec->ops)
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ec->ops = &ecard_default_ops;
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if (ec->claimed && ec->ops->fiqenable)
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ec->ops->fiqenable(ec, fiqnr);
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else
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printk(KERN_ERR "ecard: rejecting request to "
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"enable FIQs for %d\n", fiqnr);
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}
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}
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void ecard_disablefiq(unsigned int fiqnr)
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{
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ecard_t *ec = slot_to_ecard(fiqnr);
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if (ec) {
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if (!ec->ops)
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ec->ops = &ecard_default_ops;
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if (ec->ops->fiqdisable)
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ec->ops->fiqdisable(ec, fiqnr);
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}
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}
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static void
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ecard_dump_irq_state(ecard_t *ec)
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{
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printk(" %d: %sclaimed, ",
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ec->slot_no,
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ec->claimed ? "" : "not ");
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if (ec->ops && ec->ops->irqpending &&
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ec->ops != &ecard_default_ops)
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printk("irq %spending\n",
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ec->ops->irqpending(ec) ? "" : "not ");
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else
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printk("irqaddr %p, mask = %02X, status = %02X\n",
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ec->irqaddr, ec->irqmask, *ec->irqaddr);
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}
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static void ecard_check_lockup(struct irqdesc *desc)
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{
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static int last, lockup;
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ecard_t *ec;
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/*
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* If the timer interrupt has not run since the last million
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* unrecognised expansion card interrupts, then there is
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* something seriously wrong. Disable the expansion card
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* interrupts so at least we can continue.
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*
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* Maybe we ought to start a timer to re-enable them some time
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* later?
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*/
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if (last == jiffies) {
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lockup += 1;
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if (lockup > 1000000) {
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printk(KERN_ERR "\nInterrupt lockup detected - "
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"disabling all expansion card interrupts\n");
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desc->chip->mask(IRQ_EXPANSIONCARD);
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printk("Expansion card IRQ state:\n");
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for (ec = cards; ec; ec = ec->next)
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ecard_dump_irq_state(ec);
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}
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} else
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lockup = 0;
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/*
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* If we did not recognise the source of this interrupt,
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* warn the user, but don't flood the user with these messages.
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*/
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if (!last || time_after(jiffies, (unsigned long)(last + 5*HZ))) {
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last = jiffies;
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printk(KERN_WARNING "Unrecognised interrupt from backplane\n");
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}
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}
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static void
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ecard_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
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{
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ecard_t *ec;
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int called = 0;
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desc->chip->mask(irq);
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for (ec = cards; ec; ec = ec->next) {
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int pending;
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if (!ec->claimed || ec->irq == NO_IRQ)
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continue;
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if (ec->ops && ec->ops->irqpending)
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pending = ec->ops->irqpending(ec);
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else
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pending = ecard_default_ops.irqpending(ec);
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if (pending) {
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struct irqdesc *d = irq_desc + ec->irq;
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d->handle(ec->irq, d, regs);
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called ++;
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}
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}
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desc->chip->unmask(irq);
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if (called == 0)
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ecard_check_lockup(desc);
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}
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#define ecard_irqexp_handler NULL
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#define ecard_probeirqhw() (0)
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unsigned int ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed)
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{
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unsigned long address = 0;
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int slot = ec->slot_no;
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ectcr &= ~(1 << slot);
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switch (type) {
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case ECARD_MEMC:
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address = IO_EC_MEMC_BASE + (slot << 12);
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||
|
break;
|
||
|
|
||
|
case ECARD_IOC:
|
||
|
address = IO_EC_IOC_BASE + (slot << 12) + (speed << 17);
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
return address;
|
||
|
}
|
||
|
|
||
|
static int ecard_prints(char *buffer, ecard_t *ec)
|
||
|
{
|
||
|
char *start = buffer;
|
||
|
|
||
|
buffer += sprintf(buffer, " %d: ", ec->slot_no);
|
||
|
|
||
|
if (ec->cid.id == 0) {
|
||
|
struct in_chunk_dir incd;
|
||
|
|
||
|
buffer += sprintf(buffer, "[%04X:%04X] ",
|
||
|
ec->cid.manufacturer, ec->cid.product);
|
||
|
|
||
|
if (!ec->card_desc && ec->cid.cd &&
|
||
|
ecard_readchunk(&incd, ec, 0xf5, 0)) {
|
||
|
ec->card_desc = kmalloc(strlen(incd.d.string)+1, GFP_KERNEL);
|
||
|
|
||
|
if (ec->card_desc)
|
||
|
strcpy((char *)ec->card_desc, incd.d.string);
|
||
|
}
|
||
|
|
||
|
buffer += sprintf(buffer, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*");
|
||
|
} else
|
||
|
buffer += sprintf(buffer, "Simple card %d\n", ec->cid.id);
|
||
|
|
||
|
return buffer - start;
|
||
|
}
|
||
|
|
||
|
static int get_ecard_dev_info(char *buf, char **start, off_t pos, int count)
|
||
|
{
|
||
|
ecard_t *ec = cards;
|
||
|
off_t at = 0;
|
||
|
int len, cnt;
|
||
|
|
||
|
cnt = 0;
|
||
|
while (ec && count > cnt) {
|
||
|
len = ecard_prints(buf, ec);
|
||
|
at += len;
|
||
|
if (at >= pos) {
|
||
|
if (!*start) {
|
||
|
*start = buf + (pos - (at - len));
|
||
|
cnt = at - pos;
|
||
|
} else
|
||
|
cnt += len;
|
||
|
buf += len;
|
||
|
}
|
||
|
ec = ec->next;
|
||
|
}
|
||
|
return (count > cnt) ? cnt : count;
|
||
|
}
|
||
|
|
||
|
static struct proc_dir_entry *proc_bus_ecard_dir = NULL;
|
||
|
|
||
|
static void ecard_proc_init(void)
|
||
|
{
|
||
|
proc_bus_ecard_dir = proc_mkdir("ecard", proc_bus);
|
||
|
create_proc_info_entry("devices", 0, proc_bus_ecard_dir,
|
||
|
get_ecard_dev_info);
|
||
|
}
|
||
|
|
||
|
#define ec_set_resource(ec,nr,st,sz,flg) \
|
||
|
do { \
|
||
|
(ec)->resource[nr].name = ec->dev.bus_id; \
|
||
|
(ec)->resource[nr].start = st; \
|
||
|
(ec)->resource[nr].end = (st) + (sz) - 1; \
|
||
|
(ec)->resource[nr].flags = flg; \
|
||
|
} while (0)
|
||
|
|
||
|
static void __init ecard_init_resources(struct expansion_card *ec)
|
||
|
{
|
||
|
unsigned long base = PODSLOT_IOC0_BASE;
|
||
|
unsigned int slot = ec->slot_no;
|
||
|
int i;
|
||
|
|
||
|
ec_set_resource(ec, ECARD_RES_MEMC,
|
||
|
PODSLOT_MEMC_BASE + (slot << 14),
|
||
|
PODSLOT_MEMC_SIZE, IORESOURCE_MEM);
|
||
|
|
||
|
for (i = 0; i < ECARD_RES_IOCSYNC - ECARD_RES_IOCSLOW; i++) {
|
||
|
ec_set_resource(ec, i + ECARD_RES_IOCSLOW,
|
||
|
base + (slot << 14) + (i << 19),
|
||
|
PODSLOT_IOC_SIZE, IORESOURCE_MEM);
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < ECARD_NUM_RESOURCES; i++) {
|
||
|
if (ec->resource[i].start &&
|
||
|
request_resource(&iomem_resource, &ec->resource[i])) {
|
||
|
printk(KERN_ERR "%s: resource(s) not available\n",
|
||
|
ec->dev.bus_id);
|
||
|
ec->resource[i].end -= ec->resource[i].start;
|
||
|
ec->resource[i].start = 0;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static ssize_t ecard_show_irq(struct device *dev, char *buf)
|
||
|
{
|
||
|
struct expansion_card *ec = ECARD_DEV(dev);
|
||
|
return sprintf(buf, "%u\n", ec->irq);
|
||
|
}
|
||
|
|
||
|
static ssize_t ecard_show_vendor(struct device *dev, char *buf)
|
||
|
{
|
||
|
struct expansion_card *ec = ECARD_DEV(dev);
|
||
|
return sprintf(buf, "%u\n", ec->cid.manufacturer);
|
||
|
}
|
||
|
|
||
|
static ssize_t ecard_show_device(struct device *dev, char *buf)
|
||
|
{
|
||
|
struct expansion_card *ec = ECARD_DEV(dev);
|
||
|
return sprintf(buf, "%u\n", ec->cid.product);
|
||
|
}
|
||
|
|
||
|
static ssize_t ecard_show_dma(struct device *dev, char *buf)
|
||
|
{
|
||
|
struct expansion_card *ec = ECARD_DEV(dev);
|
||
|
return sprintf(buf, "%u\n", ec->dma);
|
||
|
}
|
||
|
|
||
|
static ssize_t ecard_show_resources(struct device *dev, char *buf)
|
||
|
{
|
||
|
struct expansion_card *ec = ECARD_DEV(dev);
|
||
|
char *str = buf;
|
||
|
int i;
|
||
|
|
||
|
for (i = 0; i < ECARD_NUM_RESOURCES; i++)
|
||
|
str += sprintf(str, "%08lx %08lx %08lx\n",
|
||
|
ec->resource[i].start,
|
||
|
ec->resource[i].end,
|
||
|
ec->resource[i].flags);
|
||
|
|
||
|
return str - buf;
|
||
|
}
|
||
|
|
||
|
static DEVICE_ATTR(irq, S_IRUGO, ecard_show_irq, NULL);
|
||
|
static DEVICE_ATTR(vendor, S_IRUGO, ecard_show_vendor, NULL);
|
||
|
static DEVICE_ATTR(device, S_IRUGO, ecard_show_device, NULL);
|
||
|
static DEVICE_ATTR(dma, S_IRUGO, ecard_show_dma, NULL);
|
||
|
static DEVICE_ATTR(resource, S_IRUGO, ecard_show_resources, NULL);
|
||
|
|
||
|
/*
|
||
|
* Probe for an expansion card.
|
||
|
*
|
||
|
* If bit 1 of the first byte of the card is set, then the
|
||
|
* card does not exist.
|
||
|
*/
|
||
|
static int __init
|
||
|
ecard_probe(int slot, card_type_t type)
|
||
|
{
|
||
|
ecard_t **ecp;
|
||
|
ecard_t *ec;
|
||
|
struct ex_ecid cid;
|
||
|
int i, rc = -ENOMEM;
|
||
|
|
||
|
ec = kmalloc(sizeof(ecard_t), GFP_KERNEL);
|
||
|
if (!ec)
|
||
|
goto nomem;
|
||
|
|
||
|
memset(ec, 0, sizeof(ecard_t));
|
||
|
|
||
|
ec->slot_no = slot;
|
||
|
ec->type = type;
|
||
|
ec->irq = NO_IRQ;
|
||
|
ec->fiq = NO_IRQ;
|
||
|
ec->dma = NO_DMA;
|
||
|
ec->card_desc = NULL;
|
||
|
ec->ops = &ecard_default_ops;
|
||
|
|
||
|
rc = -ENODEV;
|
||
|
if ((ec->podaddr = ecard_address(ec, type, ECARD_SYNC)) == 0)
|
||
|
goto nodev;
|
||
|
|
||
|
cid.r_zero = 1;
|
||
|
ecard_readbytes(&cid, ec, 0, 16, 0);
|
||
|
if (cid.r_zero)
|
||
|
goto nodev;
|
||
|
|
||
|
ec->cid.id = cid.r_id;
|
||
|
ec->cid.cd = cid.r_cd;
|
||
|
ec->cid.is = cid.r_is;
|
||
|
ec->cid.w = cid.r_w;
|
||
|
ec->cid.manufacturer = ecard_getu16(cid.r_manu);
|
||
|
ec->cid.product = ecard_getu16(cid.r_prod);
|
||
|
ec->cid.country = cid.r_country;
|
||
|
ec->cid.irqmask = cid.r_irqmask;
|
||
|
ec->cid.irqoff = ecard_gets24(cid.r_irqoff);
|
||
|
ec->cid.fiqmask = cid.r_fiqmask;
|
||
|
ec->cid.fiqoff = ecard_gets24(cid.r_fiqoff);
|
||
|
ec->fiqaddr =
|
||
|
ec->irqaddr = (unsigned char *)ioaddr(ec->podaddr);
|
||
|
|
||
|
if (ec->cid.is) {
|
||
|
ec->irqmask = ec->cid.irqmask;
|
||
|
ec->irqaddr += ec->cid.irqoff;
|
||
|
ec->fiqmask = ec->cid.fiqmask;
|
||
|
ec->fiqaddr += ec->cid.fiqoff;
|
||
|
} else {
|
||
|
ec->irqmask = 1;
|
||
|
ec->fiqmask = 4;
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < sizeof(blacklist) / sizeof(*blacklist); i++)
|
||
|
if (blacklist[i].manufacturer == ec->cid.manufacturer &&
|
||
|
blacklist[i].product == ec->cid.product) {
|
||
|
ec->card_desc = blacklist[i].type;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
snprintf(ec->dev.bus_id, sizeof(ec->dev.bus_id), "ecard%d", slot);
|
||
|
ec->dev.parent = NULL;
|
||
|
ec->dev.bus = &ecard_bus_type;
|
||
|
ec->dev.dma_mask = &ec->dma_mask;
|
||
|
ec->dma_mask = (u64)0xffffffff;
|
||
|
|
||
|
ecard_init_resources(ec);
|
||
|
|
||
|
/*
|
||
|
* hook the interrupt handlers
|
||
|
*/
|
||
|
ec->irq = 32 + slot;
|
||
|
set_irq_chip(ec->irq, &ecard_chip);
|
||
|
set_irq_handler(ec->irq, do_level_IRQ);
|
||
|
set_irq_flags(ec->irq, IRQF_VALID);
|
||
|
|
||
|
for (ecp = &cards; *ecp; ecp = &(*ecp)->next);
|
||
|
|
||
|
*ecp = ec;
|
||
|
slot_to_expcard[slot] = ec;
|
||
|
|
||
|
device_register(&ec->dev);
|
||
|
device_create_file(&ec->dev, &dev_attr_dma);
|
||
|
device_create_file(&ec->dev, &dev_attr_irq);
|
||
|
device_create_file(&ec->dev, &dev_attr_resource);
|
||
|
device_create_file(&ec->dev, &dev_attr_vendor);
|
||
|
device_create_file(&ec->dev, &dev_attr_device);
|
||
|
|
||
|
return 0;
|
||
|
|
||
|
nodev:
|
||
|
kfree(ec);
|
||
|
nomem:
|
||
|
return rc;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Initialise the expansion card system.
|
||
|
* Locate all hardware - interrupt management and
|
||
|
* actual cards.
|
||
|
*/
|
||
|
static int __init ecard_init(void)
|
||
|
{
|
||
|
int slot, irqhw;
|
||
|
|
||
|
printk("Probing expansion cards\n");
|
||
|
|
||
|
for (slot = 0; slot < MAX_ECARDS; slot ++) {
|
||
|
ecard_probe(slot, ECARD_IOC);
|
||
|
}
|
||
|
|
||
|
irqhw = ecard_probeirqhw();
|
||
|
|
||
|
set_irq_chained_handler(IRQ_EXPANSIONCARD,
|
||
|
irqhw ? ecard_irqexp_handler : ecard_irq_handler);
|
||
|
|
||
|
ecard_proc_init();
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
subsys_initcall(ecard_init);
|
||
|
|
||
|
/*
|
||
|
* ECARD "bus"
|
||
|
*/
|
||
|
static const struct ecard_id *
|
||
|
ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec)
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
for (i = 0; ids[i].manufacturer != 65535; i++)
|
||
|
if (ec->cid.manufacturer == ids[i].manufacturer &&
|
||
|
ec->cid.product == ids[i].product)
|
||
|
return ids + i;
|
||
|
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
static int ecard_drv_probe(struct device *dev)
|
||
|
{
|
||
|
struct expansion_card *ec = ECARD_DEV(dev);
|
||
|
struct ecard_driver *drv = ECARD_DRV(dev->driver);
|
||
|
const struct ecard_id *id;
|
||
|
int ret;
|
||
|
|
||
|
id = ecard_match_device(drv->id_table, ec);
|
||
|
|
||
|
ecard_claim(ec);
|
||
|
ret = drv->probe(ec, id);
|
||
|
if (ret)
|
||
|
ecard_release(ec);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static int ecard_drv_remove(struct device *dev)
|
||
|
{
|
||
|
struct expansion_card *ec = ECARD_DEV(dev);
|
||
|
struct ecard_driver *drv = ECARD_DRV(dev->driver);
|
||
|
|
||
|
drv->remove(ec);
|
||
|
ecard_release(ec);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Before rebooting, we must make sure that the expansion card is in a
|
||
|
* sensible state, so it can be re-detected. This means that the first
|
||
|
* page of the ROM must be visible. We call the expansion cards reset
|
||
|
* handler, if any.
|
||
|
*/
|
||
|
static void ecard_drv_shutdown(struct device *dev)
|
||
|
{
|
||
|
struct expansion_card *ec = ECARD_DEV(dev);
|
||
|
struct ecard_driver *drv = ECARD_DRV(dev->driver);
|
||
|
struct ecard_request req;
|
||
|
|
||
|
if (drv->shutdown)
|
||
|
drv->shutdown(ec);
|
||
|
ecard_release(ec);
|
||
|
req.req = req_reset;
|
||
|
req.ec = ec;
|
||
|
ecard_call(&req);
|
||
|
}
|
||
|
|
||
|
int ecard_register_driver(struct ecard_driver *drv)
|
||
|
{
|
||
|
drv->drv.bus = &ecard_bus_type;
|
||
|
drv->drv.probe = ecard_drv_probe;
|
||
|
drv->drv.remove = ecard_drv_remove;
|
||
|
drv->drv.shutdown = ecard_drv_shutdown;
|
||
|
|
||
|
return driver_register(&drv->drv);
|
||
|
}
|
||
|
|
||
|
void ecard_remove_driver(struct ecard_driver *drv)
|
||
|
{
|
||
|
driver_unregister(&drv->drv);
|
||
|
}
|
||
|
|
||
|
static int ecard_match(struct device *_dev, struct device_driver *_drv)
|
||
|
{
|
||
|
struct expansion_card *ec = ECARD_DEV(_dev);
|
||
|
struct ecard_driver *drv = ECARD_DRV(_drv);
|
||
|
int ret;
|
||
|
|
||
|
if (drv->id_table) {
|
||
|
ret = ecard_match_device(drv->id_table, ec) != NULL;
|
||
|
} else {
|
||
|
ret = ec->cid.id == drv->id;
|
||
|
}
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
struct bus_type ecard_bus_type = {
|
||
|
.name = "ecard",
|
||
|
.match = ecard_match,
|
||
|
};
|
||
|
|
||
|
static int ecard_bus_init(void)
|
||
|
{
|
||
|
return bus_register(&ecard_bus_type);
|
||
|
}
|
||
|
|
||
|
postcore_initcall(ecard_bus_init);
|
||
|
|
||
|
EXPORT_SYMBOL(ecard_readchunk);
|
||
|
EXPORT_SYMBOL(ecard_address);
|
||
|
EXPORT_SYMBOL(ecard_register_driver);
|
||
|
EXPORT_SYMBOL(ecard_remove_driver);
|
||
|
EXPORT_SYMBOL(ecard_bus_type);
|