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/*
* Copyright (C) 2008 Sensoray Company Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/usb.h>
#include <dvb-usb.h>
#define S2250_LOADER_FIRMWARE "s2250_loader.fw"
#define S2250_FIRMWARE "s2250.fw"
typedef struct device_extension_s {
struct kref kref;
int minor;
struct usb_device *usbdev;
} device_extension_t, *pdevice_extension_t;
#define USB_s2250loader_MAJOR 240
#define USB_s2250loader_MINOR_BASE 0
#define MAX_DEVICES 256
static pdevice_extension_t s2250_dev_table[MAX_DEVICES];
static DEFINE_MUTEX(s2250_dev_table_mutex);
#define to_s2250loader_dev_common(d) container_of(d, device_extension_t, kref)
static void s2250loader_delete(struct kref *kref)
{
pdevice_extension_t s = to_s2250loader_dev_common(kref);
s2250_dev_table[s->minor] = NULL;
kfree(s);
}
static int s2250loader_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct usb_device *usbdev;
int minor, ret;
pdevice_extension_t s = NULL;
const struct firmware *fw;
usbdev = usb_get_dev(interface_to_usbdev(interface));
if (!usbdev) {
printk(KERN_ERR "Enter s2250loader_probe failed\n");
return -1;
}
printk(KERN_INFO "Enter s2250loader_probe 2.6 kernel\n");
printk(KERN_INFO "vendor id 0x%x, device id 0x%x devnum:%d\n",
usbdev->descriptor.idVendor, usbdev->descriptor.idProduct,
usbdev->devnum);
if (usbdev->descriptor.bNumConfigurations != 1) {
printk(KERN_ERR "can't handle multiple config\n");
return -1;
}
mutex_lock(&s2250_dev_table_mutex);
for (minor = 0; minor < MAX_DEVICES; minor++) {
if (s2250_dev_table[minor] == NULL)
break;
}
if (minor < 0 || minor >= MAX_DEVICES) {
printk(KERN_ERR "Invalid minor: %d\n", minor);
goto failed;
}
/* Allocate dev data structure */
s = kmalloc(sizeof(device_extension_t), GFP_KERNEL);
if (s == NULL) {
printk(KERN_ERR "Out of memory\n");
goto failed;
}
s2250_dev_table[minor] = s;
printk(KERN_INFO "s2250loader_probe: Device %d on Bus %d Minor %d\n",
usbdev->devnum, usbdev->bus->busnum, minor);
memset(s, 0, sizeof(device_extension_t));
s->usbdev = usbdev;
printk(KERN_INFO "loading 2250 loader\n");
kref_init(&(s->kref));
mutex_unlock(&s2250_dev_table_mutex);
if (request_firmware(&fw, S2250_LOADER_FIRMWARE, &usbdev->dev)) {
printk(KERN_ERR
"s2250: unable to load firmware from file \"%s\"\n",
S2250_LOADER_FIRMWARE);
goto failed2;
}
ret = usb_cypress_load_firmware(usbdev, fw, CYPRESS_FX2);
release_firmware(fw);
if (0 != ret) {
printk(KERN_ERR "loader download failed\n");
goto failed2;
}
if (request_firmware(&fw, S2250_FIRMWARE, &usbdev->dev)) {
printk(KERN_ERR
"s2250: unable to load firmware from file \"%s\"\n",
S2250_FIRMWARE);
goto failed2;
}
ret = usb_cypress_load_firmware(usbdev, fw, CYPRESS_FX2);
release_firmware(fw);
if (0 != ret) {
printk(KERN_ERR "firmware_s2250 download failed\n");
goto failed2;
}
usb_set_intfdata(interface, s);
return 0;
failed:
mutex_unlock(&s2250_dev_table_mutex);
failed2:
if (s)
kref_put(&(s->kref), s2250loader_delete);
printk(KERN_ERR "probe failed\n");
return -1;
}
static void s2250loader_disconnect(struct usb_interface *interface)
{
pdevice_extension_t s;
printk(KERN_INFO "s2250: disconnect\n");
lock_kernel();
s = usb_get_intfdata(interface);
usb_set_intfdata(interface, NULL);
kref_put(&(s->kref), s2250loader_delete);
unlock_kernel();
}
static const struct usb_device_id s2250loader_ids[] = {
{USB_DEVICE(0x1943, 0xa250)},
{} /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, s2250loader_ids);
static struct usb_driver s2250loader_driver = {
.name = "s2250-loader",
.probe = s2250loader_probe,
.disconnect = s2250loader_disconnect,
.id_table = s2250loader_ids,
};
static int __init s2250loader_init(void)
{
int r;
unsigned i = 0;
for (i = 0; i < MAX_DEVICES; i++)
s2250_dev_table[i] = NULL;
r = usb_register(&s2250loader_driver);
if (r) {
printk(KERN_ERR "usb_register failed. Error number %d\n", r);
return -1;
}
printk(KERN_INFO "s2250loader_init: driver registered\n");
return 0;
}
module_init(s2250loader_init);
static void __exit s2250loader_cleanup(void)
{
printk(KERN_INFO "s2250loader_cleanup\n");
usb_deregister(&s2250loader_driver);
}
module_exit(s2250loader_cleanup);
MODULE_AUTHOR("");
MODULE_DESCRIPTION("firmware loader for Sensoray 2250/2251");
MODULE_LICENSE("GPL v2");
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