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/*
* Startup tool for non statically mapped PCMCIA sockets
*
* (C) 2005 Dominik Brodowski <linux@brodo.de>
*
* The initial developer of the original code is David A. Hinds
* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
*
* License: GPL v2
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <syslog.h>
#include <unistd.h>
#include <sysfs/libsysfs.h>
#include "startup.h"
/* uncomment for debug output */
#ifdef DEBUG
#define dprintf printf
#else
#define dprintf(...) do { } while(0);
#endif
/* Linked list of resource adjustments */
struct adjust_list_t *root_adjust = NULL;
/* path for config file, device scripts */
static char *configpath = "/etc/pcmcia";
enum {
RESOURCE_MEM,
RESOURCE_IO,
MAX_RESOURCE_FILES
};
static const char *resource_files[MAX_RESOURCE_FILES] = {
[RESOURCE_MEM] = "available_resources_mem",
[RESOURCE_IO] = "available_resources_io",
};
#define PATH_TO_SOCKET "/sys/class/pcmcia_socket/"
static int add_available_resource(unsigned int socket_no, unsigned int type,
unsigned int action,
unsigned long start, unsigned long end)
{
char file[SYSFS_PATH_MAX];
char content[SYSFS_PATH_MAX];
struct sysfs_attribute *attr;
int ret;
size_t len;
if (type >= MAX_RESOURCE_FILES)
return -EINVAL;
if (end <= start)
return -EINVAL;
dprintf("%d %d %d 0x%lx 0x%lx\n", socket_no, type, action, start, end);
snprintf(file, SYSFS_PATH_MAX, PATH_TO_SOCKET "pcmcia_socket%u/%s",
socket_no, resource_files[type]);
switch(action) {
case ADD_MANAGED_RESOURCE:
len = snprintf(content, SYSFS_PATH_MAX,
"0x%08lx - 0x%08lx", start, end);
break;
case REMOVE_MANAGED_RESOURCE:
len = snprintf(content, SYSFS_PATH_MAX,
"- 0x%08lx - 0x%08lx", start, end);
break;
default:
return -EINVAL;
}
dprintf("content is %s\n", content);
dprintf("file is %s\n", file);
attr = sysfs_open_attribute(file);
if (!attr)
return -ENODEV;
dprintf("open, len %d\n", len);
ret = sysfs_write_attribute(attr, content, len);
dprintf("ret is %d\n", ret);
sysfs_close_attribute(attr);
return (ret);
}
static int setup_done(unsigned int socket_no)
{
int ret;
char file[SYSFS_PATH_MAX];
struct sysfs_attribute *attr;
snprintf(file, SYSFS_PATH_MAX, PATH_TO_SOCKET
"pcmcia_socket%u/available_resources_setup_done",
socket_no);
attr = sysfs_open_attribute(file);
if (!attr)
return -ENODEV;
ret = sysfs_write_attribute(attr, "42", 2);
sysfs_close_attribute(attr);
return (ret);
}
static int disallow_irq(unsigned int socket_no, unsigned int irq)
{
char file[SYSFS_PATH_MAX];
char content[SYSFS_PATH_MAX];
struct sysfs_attribute *attr;
unsigned int mask = 0xfff;
unsigned int new_mask;
int ret;
size_t len;
if (irq >= 32)
return -EINVAL;
len = snprintf(file, SYSFS_PATH_MAX, PATH_TO_SOCKET
"pcmcia_socket%u/card_irq_mask",
socket_no);
dprintf("file is %s\n", file);
attr = sysfs_open_attribute(file);
if (!attr)
return -ENODEV;
dprintf("open, len %d\n", len);
ret = sysfs_read_attribute(attr);
if (ret) {
ret = -EINVAL;
goto out;
}
if (!attr->value || (attr->len < 6)) {
ret = -EIO;
goto out;
}
ret = sscanf(attr->value, "0x%x\n", &mask);
new_mask = 1 << irq;
mask &= ~new_mask;
len = snprintf(content, SYSFS_PATH_MAX, "0x%04x", mask);
dprintf("content is %s\n", content);
ret = sysfs_write_attribute(attr, content, len);
out:
sysfs_close_attribute(attr);
return (ret);
}
static void load_config(void)
{
if (chdir(configpath) != 0) {
syslog(LOG_ERR, "chdir to %s failed: %m", configpath);
exit(EXIT_FAILURE);
}
parse_configfile("config.opts");
return;
}
static void adjust_resources(unsigned int socket_no)
{
adjust_list_t *al;
for (al = root_adjust; al; al = al->next) {
switch (al->adj.Resource) {
case RES_MEMORY_RANGE:
add_available_resource(socket_no, RESOURCE_MEM,
al->adj.Action,
al->adj.resource.memory.Base,
al->adj.resource.memory.Base +
al->adj.resource.memory.Size - 1);
break;
case RES_IO_RANGE:
add_available_resource(socket_no, RESOURCE_IO,
al->adj.Action,
al->adj.resource.io.BasePort,
al->adj.resource.io.BasePort +
al->adj.resource.io.NumPorts - 1);
break;
case RES_IRQ:
if(al->adj.Action == REMOVE_MANAGED_RESOURCE)
disallow_irq(socket_no, al->adj.resource.irq.IRQ);
break;
}
}
}
/* mdk-stage1
int main(int argc, char *argv[])
{
char *socket_no;
unsigned long socket, i;
unsigned int all_sockets = 0;
if ((socket_no = getenv("SOCKET_NO"))) {
socket = strtoul(socket_no, NULL, 0);
} else if (argc == 2) {
socket = strtoul(argv[1], NULL, 0);
} else if (argc == 1) {
socket = 0;
all_sockets = 1;
} else {
return -EINVAL;
}
load_config();
for (i = 0; i < MAX_SOCKS; i++) {
if ((socket != i) && (!all_sockets))
continue;
adjust_resources(i);
setup_done(i);
}
return 0;
}
*/
void pcmcia_socket_startup(int socket_no) {
unsigned long i;
unsigned int all_sockets = 0;
if (socket_no == -1)
all_sockets = 1;
load_config();
for (i = 0; i < MAX_SOCKS; i++) {
if ((socket_no != i) && (!all_sockets))
continue;
adjust_resources(i);
setup_done(i);
}
}
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