![Dominik Brodowski](/assets/img/avatar_default.png)
NR_IRQS may be as low as 16, causing a (harmless?) buffer overflow in pcmcia_setup_isa_irq(): static u8 pcmcia_used_irq[NR_IRQS]; ... if ((try < 32) && pcmcia_used_irq[irq]) continue; This is read-only, so if this address would be non-zero, it would just mean we would not attempt an IRQ >= NR_IRQS -- which would fail anyway! And as request_irq() fails for an irq >= NR_IRQS, the setting code path: pcmcia_used_irq[irq]++; is never reached as well. Reported-by: Christoph Fritz <chf.fritz@googlemail.com> CC: stable@kernel.org Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
903 lines
22 KiB
C
903 lines
22 KiB
C
/*
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* PCMCIA 16-bit resource management functions
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*
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* The initial developer of the original code is David A. Hinds
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* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
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* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
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*
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* Copyright (C) 1999 David A. Hinds
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* Copyright (C) 2004-2005 Dominik Brodowski
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <linux/device.h>
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#include <linux/netdevice.h>
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#include <linux/slab.h>
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#include <asm/irq.h>
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#include <pcmcia/ss.h>
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#include <pcmcia/cs.h>
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#include <pcmcia/cistpl.h>
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#include <pcmcia/cisreg.h>
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#include <pcmcia/ds.h>
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#include "cs_internal.h"
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/* Access speed for IO windows */
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static int io_speed;
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module_param(io_speed, int, 0444);
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int pcmcia_validate_mem(struct pcmcia_socket *s)
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{
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if (s->resource_ops->validate_mem)
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return s->resource_ops->validate_mem(s);
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/* if there is no callback, we can assume that everything is OK */
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return 0;
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}
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struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
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int low, struct pcmcia_socket *s)
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{
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if (s->resource_ops->find_mem)
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return s->resource_ops->find_mem(base, num, align, low, s);
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return NULL;
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}
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static void release_io_space(struct pcmcia_socket *s, struct resource *res)
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{
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resource_size_t num = resource_size(res);
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int i;
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dev_dbg(&s->dev, "release_io_space for %pR\n", res);
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for (i = 0; i < MAX_IO_WIN; i++) {
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if (!s->io[i].res)
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continue;
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if ((s->io[i].res->start <= res->start) &&
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(s->io[i].res->end >= res->end)) {
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s->io[i].InUse -= num;
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if (res->parent)
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release_resource(res);
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res->start = res->end = 0;
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res->flags = IORESOURCE_IO;
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/* Free the window if no one else is using it */
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if (s->io[i].InUse == 0) {
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release_resource(s->io[i].res);
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kfree(s->io[i].res);
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s->io[i].res = NULL;
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}
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}
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}
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} /* release_io_space */
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/** alloc_io_space
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*
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* Special stuff for managing IO windows, because they are scarce
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*/
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static int alloc_io_space(struct pcmcia_socket *s, struct resource *res,
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unsigned int lines)
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{
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unsigned int align;
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unsigned int base = res->start;
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unsigned int num = res->end;
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int ret;
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res->flags |= IORESOURCE_IO;
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dev_dbg(&s->dev, "alloc_io_space request for %pR, %d lines\n",
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res, lines);
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align = base ? (lines ? 1<<lines : 0) : 1;
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if (align && (align < num)) {
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if (base) {
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dev_dbg(&s->dev, "odd IO request\n");
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align = 0;
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} else
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while (align && (align < num))
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align <<= 1;
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}
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if (base & ~(align-1)) {
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dev_dbg(&s->dev, "odd IO request\n");
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align = 0;
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}
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ret = s->resource_ops->find_io(s, res->flags, &base, num, align,
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&res->parent);
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if (ret) {
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dev_dbg(&s->dev, "alloc_io_space request failed (%d)\n", ret);
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return -EINVAL;
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}
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res->start = base;
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res->end = res->start + num - 1;
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if (res->parent) {
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ret = request_resource(res->parent, res);
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if (ret) {
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dev_warn(&s->dev,
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"request_resource %pR failed: %d\n", res, ret);
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res->parent = NULL;
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release_io_space(s, res);
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}
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}
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dev_dbg(&s->dev, "alloc_io_space request result %d: %pR\n", ret, res);
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return ret;
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} /* alloc_io_space */
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/**
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* pcmcia_access_config() - read or write card configuration registers
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*
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* pcmcia_access_config() reads and writes configuration registers in
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* attribute memory. Memory window 0 is reserved for this and the tuple
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* reading services. Drivers must use pcmcia_read_config_byte() or
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* pcmcia_write_config_byte().
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*/
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static int pcmcia_access_config(struct pcmcia_device *p_dev,
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off_t where, u8 *val,
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int (*accessf) (struct pcmcia_socket *s,
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int attr, unsigned int addr,
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unsigned int len, void *ptr))
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{
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struct pcmcia_socket *s;
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config_t *c;
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int addr;
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int ret = 0;
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s = p_dev->socket;
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mutex_lock(&s->ops_mutex);
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c = p_dev->function_config;
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if (!(c->state & CONFIG_LOCKED)) {
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dev_dbg(&s->dev, "Configuration isnt't locked\n");
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mutex_unlock(&s->ops_mutex);
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return -EACCES;
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}
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addr = (c->ConfigBase + where) >> 1;
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ret = accessf(s, 1, addr, 1, val);
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mutex_unlock(&s->ops_mutex);
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return ret;
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} /* pcmcia_access_config */
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/**
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* pcmcia_read_config_byte() - read a byte from a card configuration register
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*
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* pcmcia_read_config_byte() reads a byte from a configuration register in
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* attribute memory.
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*/
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int pcmcia_read_config_byte(struct pcmcia_device *p_dev, off_t where, u8 *val)
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{
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return pcmcia_access_config(p_dev, where, val, pcmcia_read_cis_mem);
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}
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EXPORT_SYMBOL(pcmcia_read_config_byte);
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/**
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* pcmcia_write_config_byte() - write a byte to a card configuration register
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*
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* pcmcia_write_config_byte() writes a byte to a configuration register in
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* attribute memory.
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*/
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int pcmcia_write_config_byte(struct pcmcia_device *p_dev, off_t where, u8 val)
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{
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return pcmcia_access_config(p_dev, where, &val, pcmcia_write_cis_mem);
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}
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EXPORT_SYMBOL(pcmcia_write_config_byte);
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int pcmcia_map_mem_page(struct pcmcia_device *p_dev, window_handle_t wh,
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unsigned int offset)
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{
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struct pcmcia_socket *s = p_dev->socket;
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struct resource *res = wh;
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unsigned int w;
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int ret;
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w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1;
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if (w >= MAX_WIN)
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return -EINVAL;
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mutex_lock(&s->ops_mutex);
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s->win[w].card_start = offset;
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ret = s->ops->set_mem_map(s, &s->win[w]);
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if (ret)
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dev_warn(&s->dev, "failed to set_mem_map\n");
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mutex_unlock(&s->ops_mutex);
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return ret;
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} /* pcmcia_map_mem_page */
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EXPORT_SYMBOL(pcmcia_map_mem_page);
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/** pcmcia_modify_configuration
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*
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* Modify a locked socket configuration
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*/
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int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
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modconf_t *mod)
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{
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struct pcmcia_socket *s;
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config_t *c;
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int ret;
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s = p_dev->socket;
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mutex_lock(&s->ops_mutex);
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c = p_dev->function_config;
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if (!(s->state & SOCKET_PRESENT)) {
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dev_dbg(&s->dev, "No card present\n");
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ret = -ENODEV;
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goto unlock;
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}
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if (!(c->state & CONFIG_LOCKED)) {
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dev_dbg(&s->dev, "Configuration isnt't locked\n");
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ret = -EACCES;
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goto unlock;
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}
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if (mod->Attributes & (CONF_IRQ_CHANGE_VALID | CONF_VCC_CHANGE_VALID)) {
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dev_dbg(&s->dev,
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"changing Vcc or IRQ is not allowed at this time\n");
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ret = -EINVAL;
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goto unlock;
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}
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/* We only allow changing Vpp1 and Vpp2 to the same value */
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if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
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(mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
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if (mod->Vpp1 != mod->Vpp2) {
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dev_dbg(&s->dev, "Vpp1 and Vpp2 must be the same\n");
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ret = -EINVAL;
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goto unlock;
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}
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s->socket.Vpp = mod->Vpp1;
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if (s->ops->set_socket(s, &s->socket)) {
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dev_printk(KERN_WARNING, &s->dev,
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"Unable to set VPP\n");
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ret = -EIO;
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goto unlock;
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}
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} else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
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(mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
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dev_dbg(&s->dev, "changing Vcc is not allowed at this time\n");
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ret = -EINVAL;
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goto unlock;
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}
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if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
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pccard_io_map io_off = { 0, 0, 0, 0, 1 };
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pccard_io_map io_on;
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int i;
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io_on.speed = io_speed;
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for (i = 0; i < MAX_IO_WIN; i++) {
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if (!s->io[i].res)
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continue;
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io_off.map = i;
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io_on.map = i;
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io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
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io_on.start = s->io[i].res->start;
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io_on.stop = s->io[i].res->end;
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s->ops->set_io_map(s, &io_off);
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mdelay(40);
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s->ops->set_io_map(s, &io_on);
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}
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}
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ret = 0;
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unlock:
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mutex_unlock(&s->ops_mutex);
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return ret;
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} /* modify_configuration */
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EXPORT_SYMBOL(pcmcia_modify_configuration);
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int pcmcia_release_configuration(struct pcmcia_device *p_dev)
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{
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pccard_io_map io = { 0, 0, 0, 0, 1 };
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struct pcmcia_socket *s = p_dev->socket;
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config_t *c;
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int i;
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mutex_lock(&s->ops_mutex);
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c = p_dev->function_config;
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if (p_dev->_locked) {
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p_dev->_locked = 0;
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if (--(s->lock_count) == 0) {
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s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
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s->socket.Vpp = 0;
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s->socket.io_irq = 0;
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s->ops->set_socket(s, &s->socket);
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}
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}
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if (c->state & CONFIG_LOCKED) {
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c->state &= ~CONFIG_LOCKED;
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if (c->state & CONFIG_IO_REQ)
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for (i = 0; i < MAX_IO_WIN; i++) {
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if (!s->io[i].res)
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continue;
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s->io[i].Config--;
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if (s->io[i].Config != 0)
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continue;
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io.map = i;
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s->ops->set_io_map(s, &io);
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}
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}
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mutex_unlock(&s->ops_mutex);
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return 0;
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} /* pcmcia_release_configuration */
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/** pcmcia_release_io
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*
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* Release_io() releases the I/O ranges allocated by a client. This
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* may be invoked some time after a card ejection has already dumped
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* the actual socket configuration, so if the client is "stale", we
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* don't bother checking the port ranges against the current socket
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* values.
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*/
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static int pcmcia_release_io(struct pcmcia_device *p_dev)
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{
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struct pcmcia_socket *s = p_dev->socket;
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int ret = -EINVAL;
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config_t *c;
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mutex_lock(&s->ops_mutex);
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if (!p_dev->_io)
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goto out;
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c = p_dev->function_config;
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release_io_space(s, &c->io[0]);
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if (c->io[1].end)
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release_io_space(s, &c->io[1]);
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p_dev->_io = 0;
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c->state &= ~CONFIG_IO_REQ;
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out:
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mutex_unlock(&s->ops_mutex);
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return ret;
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} /* pcmcia_release_io */
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int pcmcia_release_window(struct pcmcia_device *p_dev, struct resource *res)
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{
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struct pcmcia_socket *s = p_dev->socket;
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pccard_mem_map *win;
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unsigned int w;
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dev_dbg(&p_dev->dev, "releasing window %pR\n", res);
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w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1;
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if (w >= MAX_WIN)
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return -EINVAL;
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mutex_lock(&s->ops_mutex);
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win = &s->win[w];
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if (!(p_dev->_win & CLIENT_WIN_REQ(w))) {
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dev_dbg(&s->dev, "not releasing unknown window\n");
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mutex_unlock(&s->ops_mutex);
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return -EINVAL;
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}
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/* Shut down memory window */
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win->flags &= ~MAP_ACTIVE;
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s->ops->set_mem_map(s, win);
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s->state &= ~SOCKET_WIN_REQ(w);
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/* Release system memory */
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if (win->res) {
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release_resource(res);
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release_resource(win->res);
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kfree(win->res);
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win->res = NULL;
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}
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p_dev->_win &= ~CLIENT_WIN_REQ(w);
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mutex_unlock(&s->ops_mutex);
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return 0;
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} /* pcmcia_release_window */
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EXPORT_SYMBOL(pcmcia_release_window);
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int pcmcia_request_configuration(struct pcmcia_device *p_dev,
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config_req_t *req)
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{
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int i;
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u_int base;
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struct pcmcia_socket *s = p_dev->socket;
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config_t *c;
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pccard_io_map iomap;
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if (!(s->state & SOCKET_PRESENT))
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return -ENODEV;
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if (req->IntType & INT_CARDBUS) {
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dev_dbg(&s->dev, "IntType may not be INT_CARDBUS\n");
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return -EINVAL;
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}
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mutex_lock(&s->ops_mutex);
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c = p_dev->function_config;
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if (c->state & CONFIG_LOCKED) {
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mutex_unlock(&s->ops_mutex);
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dev_dbg(&s->dev, "Configuration is locked\n");
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return -EACCES;
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}
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/* Do power control. We don't allow changes in Vcc. */
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s->socket.Vpp = req->Vpp;
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if (s->ops->set_socket(s, &s->socket)) {
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mutex_unlock(&s->ops_mutex);
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dev_printk(KERN_WARNING, &s->dev,
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"Unable to set socket state\n");
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return -EINVAL;
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}
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/* Pick memory or I/O card, DMA mode, interrupt */
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c->IntType = req->IntType;
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c->Attributes = req->Attributes;
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if (req->IntType & INT_MEMORY_AND_IO)
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s->socket.flags |= SS_IOCARD;
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if (req->IntType & INT_ZOOMED_VIDEO)
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s->socket.flags |= SS_ZVCARD | SS_IOCARD;
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if (req->Attributes & CONF_ENABLE_DMA)
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s->socket.flags |= SS_DMA_MODE;
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if (req->Attributes & CONF_ENABLE_SPKR)
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s->socket.flags |= SS_SPKR_ENA;
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if (req->Attributes & CONF_ENABLE_IRQ)
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s->socket.io_irq = s->pcmcia_irq;
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else
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s->socket.io_irq = 0;
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s->ops->set_socket(s, &s->socket);
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s->lock_count++;
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/* Set up CIS configuration registers */
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base = c->ConfigBase = req->ConfigBase;
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c->CardValues = req->Present;
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if (req->Present & PRESENT_COPY) {
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c->Copy = req->Copy;
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pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
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}
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if (req->Present & PRESENT_OPTION) {
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if (s->functions == 1) {
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c->Option = req->ConfigIndex & COR_CONFIG_MASK;
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} else {
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c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
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c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
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if (req->Present & PRESENT_IOBASE_0)
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c->Option |= COR_ADDR_DECODE;
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}
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if ((req->Attributes & CONF_ENABLE_IRQ) &&
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!(req->Attributes & CONF_ENABLE_PULSE_IRQ))
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c->Option |= COR_LEVEL_REQ;
|
|
pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
|
|
mdelay(40);
|
|
}
|
|
if (req->Present & PRESENT_STATUS) {
|
|
c->Status = req->Status;
|
|
pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
|
|
}
|
|
if (req->Present & PRESENT_PIN_REPLACE) {
|
|
c->Pin = req->Pin;
|
|
pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
|
|
}
|
|
if (req->Present & PRESENT_EXT_STATUS) {
|
|
c->ExtStatus = req->ExtStatus;
|
|
pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
|
|
}
|
|
if (req->Present & PRESENT_IOBASE_0) {
|
|
u8 b = c->io[0].start & 0xff;
|
|
pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
|
|
b = (c->io[0].start >> 8) & 0xff;
|
|
pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
|
|
}
|
|
if (req->Present & PRESENT_IOSIZE) {
|
|
u8 b = resource_size(&c->io[0]) + resource_size(&c->io[1]) - 1;
|
|
pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
|
|
}
|
|
|
|
/* Configure I/O windows */
|
|
if (c->state & CONFIG_IO_REQ) {
|
|
iomap.speed = io_speed;
|
|
for (i = 0; i < MAX_IO_WIN; i++)
|
|
if (s->io[i].res) {
|
|
iomap.map = i;
|
|
iomap.flags = MAP_ACTIVE;
|
|
switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
|
|
case IO_DATA_PATH_WIDTH_16:
|
|
iomap.flags |= MAP_16BIT; break;
|
|
case IO_DATA_PATH_WIDTH_AUTO:
|
|
iomap.flags |= MAP_AUTOSZ; break;
|
|
default:
|
|
break;
|
|
}
|
|
iomap.start = s->io[i].res->start;
|
|
iomap.stop = s->io[i].res->end;
|
|
s->ops->set_io_map(s, &iomap);
|
|
s->io[i].Config++;
|
|
}
|
|
}
|
|
|
|
c->state |= CONFIG_LOCKED;
|
|
p_dev->_locked = 1;
|
|
mutex_unlock(&s->ops_mutex);
|
|
return 0;
|
|
} /* pcmcia_request_configuration */
|
|
EXPORT_SYMBOL(pcmcia_request_configuration);
|
|
|
|
|
|
/**
|
|
* pcmcia_request_io() - attempt to reserve port ranges for PCMCIA devices
|
|
*
|
|
* pcmcia_request_io() attepts to reserve the IO port ranges specified in
|
|
* &struct pcmcia_device @p_dev->resource[0] and @p_dev->resource[1]. The
|
|
* "start" value is the requested start of the IO port resource; "end"
|
|
* reflects the number of ports requested. The number of IO lines requested
|
|
* is specified in &struct pcmcia_device @p_dev->io_lines.
|
|
*/
|
|
int pcmcia_request_io(struct pcmcia_device *p_dev)
|
|
{
|
|
struct pcmcia_socket *s = p_dev->socket;
|
|
config_t *c = p_dev->function_config;
|
|
int ret = -EINVAL;
|
|
|
|
mutex_lock(&s->ops_mutex);
|
|
dev_dbg(&s->dev, "pcmcia_request_io: %pR , %pR", &c->io[0], &c->io[1]);
|
|
|
|
if (!(s->state & SOCKET_PRESENT)) {
|
|
dev_dbg(&s->dev, "pcmcia_request_io: No card present\n");
|
|
goto out;
|
|
}
|
|
|
|
if (c->state & CONFIG_LOCKED) {
|
|
dev_dbg(&s->dev, "Configuration is locked\n");
|
|
goto out;
|
|
}
|
|
if (c->state & CONFIG_IO_REQ) {
|
|
dev_dbg(&s->dev, "IO already configured\n");
|
|
goto out;
|
|
}
|
|
|
|
ret = alloc_io_space(s, &c->io[0], p_dev->io_lines);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (c->io[1].end) {
|
|
ret = alloc_io_space(s, &c->io[1], p_dev->io_lines);
|
|
if (ret) {
|
|
release_io_space(s, &c->io[0]);
|
|
goto out;
|
|
}
|
|
} else
|
|
c->io[1].start = 0;
|
|
|
|
c->state |= CONFIG_IO_REQ;
|
|
p_dev->_io = 1;
|
|
|
|
dev_dbg(&s->dev, "pcmcia_request_io succeeded: %pR , %pR",
|
|
&c->io[0], &c->io[1]);
|
|
out:
|
|
mutex_unlock(&s->ops_mutex);
|
|
|
|
return ret;
|
|
} /* pcmcia_request_io */
|
|
EXPORT_SYMBOL(pcmcia_request_io);
|
|
|
|
|
|
/**
|
|
* pcmcia_request_irq() - attempt to request a IRQ for a PCMCIA device
|
|
*
|
|
* pcmcia_request_irq() is a wrapper around request_irq which will allow
|
|
* the PCMCIA core to clean up the registration in pcmcia_disable_device().
|
|
* Drivers are free to use request_irq() directly, but then they need to
|
|
* call free_irq themselfves, too. Also, only IRQF_SHARED capable IRQ
|
|
* handlers are allowed.
|
|
*/
|
|
int __must_check pcmcia_request_irq(struct pcmcia_device *p_dev,
|
|
irq_handler_t handler)
|
|
{
|
|
int ret;
|
|
|
|
if (!p_dev->irq)
|
|
return -EINVAL;
|
|
|
|
ret = request_irq(p_dev->irq, handler, IRQF_SHARED,
|
|
p_dev->devname, p_dev->priv);
|
|
if (!ret)
|
|
p_dev->_irq = 1;
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(pcmcia_request_irq);
|
|
|
|
|
|
/**
|
|
* pcmcia_request_exclusive_irq() - attempt to request an exclusive IRQ first
|
|
*
|
|
* pcmcia_request_exclusive_irq() is a wrapper around request_irq which
|
|
* attempts first to request an exclusive IRQ. If it fails, it also accepts
|
|
* a shared IRQ, but prints out a warning. PCMCIA drivers should allow for
|
|
* IRQ sharing and either use request_irq directly (then they need to call
|
|
* free_irq themselves, too), or the pcmcia_request_irq() function.
|
|
*/
|
|
int __must_check
|
|
__pcmcia_request_exclusive_irq(struct pcmcia_device *p_dev,
|
|
irq_handler_t handler)
|
|
{
|
|
int ret;
|
|
|
|
if (!p_dev->irq)
|
|
return -EINVAL;
|
|
|
|
ret = request_irq(p_dev->irq, handler, 0, p_dev->devname, p_dev->priv);
|
|
if (ret) {
|
|
ret = pcmcia_request_irq(p_dev, handler);
|
|
dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: "
|
|
"request for exclusive IRQ could not be fulfilled.\n");
|
|
dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver "
|
|
"needs updating to supported shared IRQ lines.\n");
|
|
}
|
|
if (ret)
|
|
dev_printk(KERN_INFO, &p_dev->dev, "request_irq() failed\n");
|
|
else
|
|
p_dev->_irq = 1;
|
|
|
|
return ret;
|
|
} /* pcmcia_request_exclusive_irq */
|
|
EXPORT_SYMBOL(__pcmcia_request_exclusive_irq);
|
|
|
|
|
|
#ifdef CONFIG_PCMCIA_PROBE
|
|
|
|
/* mask of IRQs already reserved by other cards, we should avoid using them */
|
|
static u8 pcmcia_used_irq[32];
|
|
|
|
static irqreturn_t test_action(int cpl, void *dev_id)
|
|
{
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
/**
|
|
* pcmcia_setup_isa_irq() - determine whether an ISA IRQ can be used
|
|
* @p_dev - the associated PCMCIA device
|
|
*
|
|
* locking note: must be called with ops_mutex locked.
|
|
*/
|
|
static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type)
|
|
{
|
|
struct pcmcia_socket *s = p_dev->socket;
|
|
unsigned int try, irq;
|
|
u32 mask = s->irq_mask;
|
|
int ret = -ENODEV;
|
|
|
|
for (try = 0; try < 64; try++) {
|
|
irq = try % 32;
|
|
|
|
if (irq > NR_IRQS)
|
|
continue;
|
|
|
|
/* marked as available by driver, not blocked by userspace? */
|
|
if (!((mask >> irq) & 1))
|
|
continue;
|
|
|
|
/* avoid an IRQ which is already used by another PCMCIA card */
|
|
if ((try < 32) && pcmcia_used_irq[irq])
|
|
continue;
|
|
|
|
/* register the correct driver, if possible, to check whether
|
|
* registering a dummy handle works, i.e. if the IRQ isn't
|
|
* marked as used by the kernel resource management core */
|
|
ret = request_irq(irq, test_action, type, p_dev->devname,
|
|
p_dev);
|
|
if (!ret) {
|
|
free_irq(irq, p_dev);
|
|
p_dev->irq = s->pcmcia_irq = irq;
|
|
pcmcia_used_irq[irq]++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void pcmcia_cleanup_irq(struct pcmcia_socket *s)
|
|
{
|
|
pcmcia_used_irq[s->pcmcia_irq]--;
|
|
s->pcmcia_irq = 0;
|
|
}
|
|
|
|
#else /* CONFIG_PCMCIA_PROBE */
|
|
|
|
static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
void pcmcia_cleanup_irq(struct pcmcia_socket *s)
|
|
{
|
|
s->pcmcia_irq = 0;
|
|
return;
|
|
}
|
|
|
|
#endif /* CONFIG_PCMCIA_PROBE */
|
|
|
|
|
|
/**
|
|
* pcmcia_setup_irq() - determine IRQ to be used for device
|
|
* @p_dev - the associated PCMCIA device
|
|
*
|
|
* locking note: must be called with ops_mutex locked.
|
|
*/
|
|
int pcmcia_setup_irq(struct pcmcia_device *p_dev)
|
|
{
|
|
struct pcmcia_socket *s = p_dev->socket;
|
|
|
|
if (p_dev->irq)
|
|
return 0;
|
|
|
|
/* already assigned? */
|
|
if (s->pcmcia_irq) {
|
|
p_dev->irq = s->pcmcia_irq;
|
|
return 0;
|
|
}
|
|
|
|
/* prefer an exclusive ISA irq */
|
|
if (!pcmcia_setup_isa_irq(p_dev, 0))
|
|
return 0;
|
|
|
|
/* but accept a shared ISA irq */
|
|
if (!pcmcia_setup_isa_irq(p_dev, IRQF_SHARED))
|
|
return 0;
|
|
|
|
/* but use the PCI irq otherwise */
|
|
if (s->pci_irq) {
|
|
p_dev->irq = s->pcmcia_irq = s->pci_irq;
|
|
return 0;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
|
|
/** pcmcia_request_window
|
|
*
|
|
* Request_window() establishes a mapping between card memory space
|
|
* and system memory space.
|
|
*/
|
|
int pcmcia_request_window(struct pcmcia_device *p_dev, win_req_t *req, window_handle_t *wh)
|
|
{
|
|
struct pcmcia_socket *s = p_dev->socket;
|
|
pccard_mem_map *win;
|
|
u_long align;
|
|
struct resource *res;
|
|
int w;
|
|
|
|
if (!(s->state & SOCKET_PRESENT)) {
|
|
dev_dbg(&s->dev, "No card present\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Window size defaults to smallest available */
|
|
if (req->Size == 0)
|
|
req->Size = s->map_size;
|
|
align = (s->features & SS_CAP_MEM_ALIGN) ? req->Size : s->map_size;
|
|
if (req->Size & (s->map_size-1)) {
|
|
dev_dbg(&s->dev, "invalid map size\n");
|
|
return -EINVAL;
|
|
}
|
|
if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
|
|
(req->Base & (align-1))) {
|
|
dev_dbg(&s->dev, "invalid base address\n");
|
|
return -EINVAL;
|
|
}
|
|
if (req->Base)
|
|
align = 0;
|
|
|
|
/* Allocate system memory window */
|
|
mutex_lock(&s->ops_mutex);
|
|
for (w = 0; w < MAX_WIN; w++)
|
|
if (!(s->state & SOCKET_WIN_REQ(w)))
|
|
break;
|
|
if (w == MAX_WIN) {
|
|
dev_dbg(&s->dev, "all windows are used already\n");
|
|
mutex_unlock(&s->ops_mutex);
|
|
return -EINVAL;
|
|
}
|
|
|
|
win = &s->win[w];
|
|
|
|
if (!(s->features & SS_CAP_STATIC_MAP)) {
|
|
win->res = pcmcia_find_mem_region(req->Base, req->Size, align,
|
|
0, s);
|
|
if (!win->res) {
|
|
dev_dbg(&s->dev, "allocating mem region failed\n");
|
|
mutex_unlock(&s->ops_mutex);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
p_dev->_win |= CLIENT_WIN_REQ(w);
|
|
|
|
/* Configure the socket controller */
|
|
win->map = w+1;
|
|
win->flags = req->Attributes;
|
|
win->speed = req->AccessSpeed;
|
|
win->card_start = 0;
|
|
|
|
if (s->ops->set_mem_map(s, win) != 0) {
|
|
dev_dbg(&s->dev, "failed to set memory mapping\n");
|
|
mutex_unlock(&s->ops_mutex);
|
|
return -EIO;
|
|
}
|
|
s->state |= SOCKET_WIN_REQ(w);
|
|
|
|
/* Return window handle */
|
|
if (s->features & SS_CAP_STATIC_MAP)
|
|
req->Base = win->static_start;
|
|
else
|
|
req->Base = win->res->start;
|
|
|
|
/* convert to new-style resources */
|
|
res = p_dev->resource[w + MAX_IO_WIN];
|
|
res->start = req->Base;
|
|
res->end = req->Base + req->Size - 1;
|
|
res->flags &= ~IORESOURCE_BITS;
|
|
res->flags |= (req->Attributes & WIN_FLAGS_MAP) | (win->map << 2);
|
|
res->flags |= IORESOURCE_MEM;
|
|
res->parent = win->res;
|
|
if (win->res)
|
|
request_resource(&iomem_resource, res);
|
|
|
|
dev_dbg(&s->dev, "request_window results in %pR\n", res);
|
|
|
|
mutex_unlock(&s->ops_mutex);
|
|
*wh = res;
|
|
|
|
return 0;
|
|
} /* pcmcia_request_window */
|
|
EXPORT_SYMBOL(pcmcia_request_window);
|
|
|
|
void pcmcia_disable_device(struct pcmcia_device *p_dev)
|
|
{
|
|
int i;
|
|
for (i = 0; i < MAX_WIN; i++) {
|
|
struct resource *res = p_dev->resource[MAX_IO_WIN + i];
|
|
if (res->flags & WIN_FLAGS_REQ)
|
|
pcmcia_release_window(p_dev, res);
|
|
}
|
|
|
|
pcmcia_release_configuration(p_dev);
|
|
pcmcia_release_io(p_dev);
|
|
if (p_dev->_irq) {
|
|
free_irq(p_dev->irq, p_dev->priv);
|
|
p_dev->_irq = 0;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(pcmcia_disable_device);
|