Pete Eberlein | b11869d | 2008-10-30 12:56:41 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 Sensoray Company Inc. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License (Version 2) as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program; if not, write to the Free Software Foundation, |
| 15 | * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| 16 | */ |
| 17 | |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/usb.h> |
| 21 | #include <dvb-usb.h> |
| 22 | |
| 23 | #define S2250_LOADER_FIRMWARE "s2250_loader.fw" |
| 24 | #define S2250_FIRMWARE "s2250.fw" |
| 25 | |
| 26 | typedef struct device_extension_s { |
| 27 | struct kref kref; |
| 28 | int minor; |
| 29 | struct usb_device *usbdev; |
| 30 | } device_extension_t, *pdevice_extension_t; |
| 31 | |
| 32 | #define USB_s2250loader_MAJOR 240 |
| 33 | #define USB_s2250loader_MINOR_BASE 0 |
| 34 | #define MAX_DEVICES 256 |
| 35 | |
| 36 | static pdevice_extension_t s2250_dev_table[MAX_DEVICES]; |
| 37 | static DECLARE_MUTEX(s2250_dev_table_mutex); |
| 38 | |
| 39 | #define to_s2250loader_dev_common(d) container_of(d, device_extension_t, kref) |
| 40 | static void s2250loader_delete(struct kref *kref) |
| 41 | { |
| 42 | pdevice_extension_t s = to_s2250loader_dev_common(kref); |
| 43 | s2250_dev_table[s->minor] = NULL; |
| 44 | kfree(s); |
| 45 | } |
| 46 | |
| 47 | static int s2250loader_probe(struct usb_interface *interface, |
| 48 | const struct usb_device_id *id) |
| 49 | { |
| 50 | struct usb_device *usbdev; |
| 51 | int minor, ret; |
| 52 | pdevice_extension_t s = NULL; |
| 53 | const struct firmware *fw; |
| 54 | |
| 55 | usbdev = usb_get_dev(interface_to_usbdev(interface)); |
| 56 | if (!usbdev) { |
| 57 | printk(KERN_ERR "Enter s2250loader_probe failed\n"); |
| 58 | return -1; |
| 59 | } |
| 60 | printk(KERN_INFO "Enter s2250loader_probe 2.6 kernel\n"); |
| 61 | printk(KERN_INFO "vendor id 0x%x, device id 0x%x devnum:%d\n", |
| 62 | usbdev->descriptor.idVendor, usbdev->descriptor.idProduct, |
| 63 | usbdev->devnum); |
| 64 | |
| 65 | if (usbdev->descriptor.bNumConfigurations != 1) { |
| 66 | printk(KERN_ERR "can't handle multiple config\n"); |
| 67 | return -1; |
| 68 | } |
| 69 | down(&s2250_dev_table_mutex); |
| 70 | |
| 71 | for (minor = 0; minor < MAX_DEVICES; minor++) { |
| 72 | if (s2250_dev_table[minor] == NULL) |
| 73 | break; |
| 74 | } |
| 75 | |
| 76 | if (minor < 0 || minor >= MAX_DEVICES) { |
| 77 | printk(KERN_ERR "Invalid minor: %d\n", minor); |
| 78 | goto failed; |
| 79 | } |
| 80 | |
| 81 | /* Allocate dev data structure */ |
| 82 | s = kmalloc(sizeof(device_extension_t), GFP_KERNEL); |
| 83 | if (s == NULL) { |
| 84 | printk(KERN_ERR "Out of memory\n"); |
| 85 | goto failed; |
| 86 | } |
| 87 | s2250_dev_table[minor] = s; |
| 88 | |
| 89 | printk(KERN_INFO "s2250loader_probe: Device %d on Bus %d Minor %d\n", |
| 90 | usbdev->devnum, usbdev->bus->busnum, minor); |
| 91 | |
| 92 | memset(s, 0, sizeof(device_extension_t)); |
| 93 | s->usbdev = usbdev; |
| 94 | printk(KERN_INFO "loading 2250 loader\n"); |
| 95 | |
| 96 | kref_init(&(s->kref)); |
| 97 | |
| 98 | up(&s2250_dev_table_mutex); |
| 99 | |
| 100 | if (request_firmware(&fw, S2250_LOADER_FIRMWARE, &usbdev->dev)) { |
| 101 | printk(KERN_ERR |
| 102 | "s2250: unable to load firmware from file \"%s\"\n", |
| 103 | S2250_LOADER_FIRMWARE); |
| 104 | goto failed2; |
| 105 | } |
| 106 | ret = usb_cypress_load_firmware(usbdev, fw, CYPRESS_FX2); |
| 107 | release_firmware(fw); |
| 108 | if (0 != ret) { |
| 109 | printk(KERN_ERR "loader download failed\n"); |
| 110 | goto failed2; |
| 111 | } |
| 112 | |
| 113 | if (request_firmware(&fw, S2250_FIRMWARE, &usbdev->dev)) { |
| 114 | printk(KERN_ERR |
| 115 | "s2250: unable to load firmware from file \"%s\"\n", |
| 116 | S2250_FIRMWARE); |
| 117 | goto failed2; |
| 118 | } |
| 119 | ret = usb_cypress_load_firmware(usbdev, fw, CYPRESS_FX2); |
| 120 | release_firmware(fw); |
| 121 | if (0 != ret) { |
| 122 | printk(KERN_ERR "firmware_s2250 download failed\n"); |
| 123 | goto failed2; |
| 124 | } |
| 125 | |
| 126 | usb_set_intfdata(interface, s); |
| 127 | return 0; |
| 128 | |
| 129 | failed: |
| 130 | up(&s2250_dev_table_mutex); |
| 131 | failed2: |
| 132 | if (s) |
| 133 | kref_put(&(s->kref), s2250loader_delete); |
| 134 | |
| 135 | printk(KERN_ERR "probe failed\n"); |
| 136 | return -1; |
| 137 | } |
| 138 | |
| 139 | static void s2250loader_disconnect(struct usb_interface *interface) |
| 140 | { |
| 141 | pdevice_extension_t s = usb_get_intfdata(interface); |
| 142 | printk(KERN_INFO "s2250: disconnect\n"); |
| 143 | lock_kernel(); |
| 144 | s = usb_get_intfdata(interface); |
| 145 | usb_set_intfdata(interface, NULL); |
| 146 | kref_put(&(s->kref), s2250loader_delete); |
| 147 | unlock_kernel(); |
| 148 | } |
| 149 | |
| 150 | static struct usb_device_id s2250loader_ids[] = { |
| 151 | {USB_DEVICE(0x1943, 0xa250)}, |
| 152 | {} /* Terminating entry */ |
| 153 | }; |
| 154 | |
| 155 | MODULE_DEVICE_TABLE(usb, s2250loader_ids); |
| 156 | |
| 157 | static struct usb_driver s2250loader_driver = { |
| 158 | .name = "s2250-loader", |
| 159 | .probe = s2250loader_probe, |
| 160 | .disconnect = s2250loader_disconnect, |
| 161 | .id_table = s2250loader_ids, |
| 162 | }; |
| 163 | |
| 164 | int s2250loader_init(void) |
| 165 | { |
| 166 | int r; |
| 167 | unsigned i = 0; |
| 168 | |
| 169 | for (i = 0; i < MAX_DEVICES; i++) |
| 170 | s2250_dev_table[i] = NULL; |
| 171 | |
| 172 | r = usb_register(&s2250loader_driver); |
| 173 | if (r) { |
| 174 | printk(KERN_ERR "usb_register failed. Error number %d\n", r); |
| 175 | return -1; |
| 176 | } |
| 177 | |
| 178 | printk(KERN_INFO "s2250loader_init: driver registered\n"); |
| 179 | return 0; |
| 180 | } |
| 181 | EXPORT_SYMBOL(s2250loader_init); |
| 182 | |
| 183 | void s2250loader_cleanup(void) |
| 184 | { |
| 185 | printk(KERN_INFO "s2250loader_cleanup\n"); |
| 186 | usb_deregister(&s2250loader_driver); |
| 187 | } |
| 188 | EXPORT_SYMBOL(s2250loader_cleanup); |