akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 1 | /* |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 2 | em28xx-core.c - driver for Empia EM2800/EM2820/2840 USB video capture devices |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 3 | |
Mauro Carvalho Chehab | f7abcd3 | 2005-11-08 21:38:25 -0800 | [diff] [blame] | 4 | Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> |
| 5 | Markus Rechberger <mrechberger@gmail.com> |
Mauro Carvalho Chehab | 2e7c6dc | 2006-04-03 07:53:40 -0300 | [diff] [blame] | 6 | Mauro Carvalho Chehab <mchehab@infradead.org> |
Mauro Carvalho Chehab | f7abcd3 | 2005-11-08 21:38:25 -0800 | [diff] [blame] | 7 | Sascha Sommer <saschasommer@freenet.de> |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 22 | */ |
| 23 | |
| 24 | #include <linux/init.h> |
| 25 | #include <linux/list.h> |
| 26 | #include <linux/module.h> |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 27 | #include <linux/usb.h> |
| 28 | #include <linux/vmalloc.h> |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 29 | |
Mauro Carvalho Chehab | f7abcd3 | 2005-11-08 21:38:25 -0800 | [diff] [blame] | 30 | #include "em28xx.h" |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 31 | |
| 32 | /* #define ENABLE_DEBUG_ISOC_FRAMES */ |
| 33 | |
Mauro Carvalho Chehab | d21838d | 2006-01-09 15:25:21 -0200 | [diff] [blame] | 34 | static unsigned int core_debug = 0; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 35 | module_param(core_debug,int,0644); |
| 36 | MODULE_PARM_DESC(core_debug,"enable debug messages [core]"); |
| 37 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 38 | #define em28xx_coredbg(fmt, arg...) do {\ |
Mauro Carvalho Chehab | 4ac9791 | 2005-11-08 21:37:43 -0800 | [diff] [blame] | 39 | if (core_debug) \ |
| 40 | printk(KERN_INFO "%s %s :"fmt, \ |
Jean Delvare | f85c657 | 2005-12-19 08:53:59 -0200 | [diff] [blame] | 41 | dev->name, __FUNCTION__ , ##arg); } while (0) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 42 | |
Mauro Carvalho Chehab | d21838d | 2006-01-09 15:25:21 -0200 | [diff] [blame] | 43 | static unsigned int reg_debug = 0; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 44 | module_param(reg_debug,int,0644); |
| 45 | MODULE_PARM_DESC(reg_debug,"enable debug messages [URB reg]"); |
| 46 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 47 | #define em28xx_regdbg(fmt, arg...) do {\ |
Mauro Carvalho Chehab | 4ac9791 | 2005-11-08 21:37:43 -0800 | [diff] [blame] | 48 | if (reg_debug) \ |
| 49 | printk(KERN_INFO "%s %s :"fmt, \ |
Jean Delvare | f85c657 | 2005-12-19 08:53:59 -0200 | [diff] [blame] | 50 | dev->name, __FUNCTION__ , ##arg); } while (0) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 51 | |
Mauro Carvalho Chehab | d21838d | 2006-01-09 15:25:21 -0200 | [diff] [blame] | 52 | static unsigned int isoc_debug = 0; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 53 | module_param(isoc_debug,int,0644); |
Paul Vriens | 55b8b2d | 2005-11-08 21:37:29 -0800 | [diff] [blame] | 54 | MODULE_PARM_DESC(isoc_debug,"enable debug messages [isoc transfers]"); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 55 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 56 | #define em28xx_isocdbg(fmt, arg...) do {\ |
Mauro Carvalho Chehab | 4ac9791 | 2005-11-08 21:37:43 -0800 | [diff] [blame] | 57 | if (isoc_debug) \ |
| 58 | printk(KERN_INFO "%s %s :"fmt, \ |
Jean Delvare | f85c657 | 2005-12-19 08:53:59 -0200 | [diff] [blame] | 59 | dev->name, __FUNCTION__ , ##arg); } while (0) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 60 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 61 | static int alt = EM28XX_PINOUT; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 62 | module_param(alt, int, 0644); |
| 63 | MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint"); |
| 64 | |
Mauro Carvalho Chehab | 674434c | 2005-12-12 00:37:28 -0800 | [diff] [blame] | 65 | |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 66 | /* |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 67 | * em28xx_request_buffers() |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 68 | * allocate a number of buffers |
| 69 | */ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 70 | u32 em28xx_request_buffers(struct em28xx *dev, u32 count) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 71 | { |
| 72 | const size_t imagesize = PAGE_ALIGN(dev->frame_size); /*needs to be page aligned cause the buffers can be mapped individually! */ |
| 73 | void *buff = NULL; |
| 74 | u32 i; |
Mauro Carvalho Chehab | 3687e1e | 2008-02-08 15:44:25 -0300 | [diff] [blame^] | 75 | em28xx_coredbg("requested %i buffers with size %zi\n", |
| 76 | count, imagesize); |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 77 | if (count > EM28XX_NUM_FRAMES) |
| 78 | count = EM28XX_NUM_FRAMES; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 79 | |
| 80 | dev->num_frames = count; |
| 81 | while (dev->num_frames > 0) { |
Sascha Sommer | 3639c86 | 2005-12-12 00:37:30 -0800 | [diff] [blame] | 82 | if ((buff = vmalloc_32(dev->num_frames * imagesize))) { |
| 83 | memset(buff, 0, dev->num_frames * imagesize); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 84 | break; |
Sascha Sommer | 3639c86 | 2005-12-12 00:37:30 -0800 | [diff] [blame] | 85 | } |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 86 | dev->num_frames--; |
| 87 | } |
| 88 | |
| 89 | for (i = 0; i < dev->num_frames; i++) { |
| 90 | dev->frame[i].bufmem = buff + i * imagesize; |
| 91 | dev->frame[i].buf.index = i; |
| 92 | dev->frame[i].buf.m.offset = i * imagesize; |
| 93 | dev->frame[i].buf.length = dev->frame_size; |
| 94 | dev->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 95 | dev->frame[i].buf.sequence = 0; |
| 96 | dev->frame[i].buf.field = V4L2_FIELD_NONE; |
| 97 | dev->frame[i].buf.memory = V4L2_MEMORY_MMAP; |
| 98 | dev->frame[i].buf.flags = 0; |
| 99 | } |
| 100 | return dev->num_frames; |
| 101 | } |
| 102 | |
| 103 | /* |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 104 | * em28xx_queue_unusedframes() |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 105 | * add all frames that are not currently in use to the inbuffer queue |
| 106 | */ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 107 | void em28xx_queue_unusedframes(struct em28xx *dev) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 108 | { |
| 109 | unsigned long lock_flags; |
| 110 | u32 i; |
| 111 | |
| 112 | for (i = 0; i < dev->num_frames; i++) |
| 113 | if (dev->frame[i].state == F_UNUSED) { |
| 114 | dev->frame[i].state = F_QUEUED; |
| 115 | spin_lock_irqsave(&dev->queue_lock, lock_flags); |
| 116 | list_add_tail(&dev->frame[i].frame, &dev->inqueue); |
| 117 | spin_unlock_irqrestore(&dev->queue_lock, lock_flags); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | /* |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 122 | * em28xx_release_buffers() |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 123 | * free frame buffers |
| 124 | */ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 125 | void em28xx_release_buffers(struct em28xx *dev) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 126 | { |
| 127 | if (dev->num_frames) { |
Sascha Sommer | 3639c86 | 2005-12-12 00:37:30 -0800 | [diff] [blame] | 128 | vfree(dev->frame[0].bufmem); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 129 | dev->num_frames = 0; |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | /* |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 134 | * em28xx_read_reg_req() |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 135 | * reads data from the usb device specifying bRequest |
| 136 | */ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 137 | int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg, |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 138 | char *buf, int len) |
| 139 | { |
| 140 | int ret, byte; |
| 141 | |
Markus Rechberger | 9f38724 | 2006-02-07 06:49:11 -0200 | [diff] [blame] | 142 | if (dev->state & DEV_DISCONNECTED) |
| 143 | return(-ENODEV); |
| 144 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 145 | em28xx_regdbg("req=%02x, reg=%02x ", req, reg); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 146 | |
| 147 | ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), req, |
| 148 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| 149 | 0x0000, reg, buf, len, HZ); |
| 150 | |
| 151 | if (reg_debug){ |
| 152 | printk(ret < 0 ? " failed!\n" : "%02x values: ", ret); |
| 153 | for (byte = 0; byte < len; byte++) { |
Mauro Carvalho Chehab | 0da5176 | 2008-02-06 15:55:19 -0300 | [diff] [blame] | 154 | printk(" %02x", (unsigned char)buf[byte]); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 155 | } |
| 156 | printk("\n"); |
| 157 | } |
| 158 | |
| 159 | return ret; |
| 160 | } |
| 161 | |
| 162 | /* |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 163 | * em28xx_read_reg_req() |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 164 | * reads data from the usb device specifying bRequest |
| 165 | */ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 166 | int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 167 | { |
| 168 | u8 val; |
| 169 | int ret; |
| 170 | |
Markus Rechberger | 9f38724 | 2006-02-07 06:49:11 -0200 | [diff] [blame] | 171 | if (dev->state & DEV_DISCONNECTED) |
| 172 | return(-ENODEV); |
| 173 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 174 | em28xx_regdbg("req=%02x, reg=%02x:", req, reg); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 175 | |
| 176 | ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), req, |
| 177 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| 178 | 0x0000, reg, &val, 1, HZ); |
| 179 | |
| 180 | if (reg_debug) |
Mauro Carvalho Chehab | 0da5176 | 2008-02-06 15:55:19 -0300 | [diff] [blame] | 181 | printk(ret < 0 ? " failed!\n" : |
| 182 | "%02x\n", (unsigned char) val); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 183 | |
| 184 | if (ret < 0) |
| 185 | return ret; |
| 186 | |
| 187 | return val; |
| 188 | } |
| 189 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 190 | int em28xx_read_reg(struct em28xx *dev, u16 reg) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 191 | { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 192 | return em28xx_read_reg_req(dev, USB_REQ_GET_STATUS, reg); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | /* |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 196 | * em28xx_write_regs_req() |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 197 | * sends data to the usb device, specifying bRequest |
| 198 | */ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 199 | int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf, |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 200 | int len) |
| 201 | { |
| 202 | int ret; |
| 203 | |
| 204 | /*usb_control_msg seems to expect a kmalloced buffer */ |
Markus Rechberger | 9f38724 | 2006-02-07 06:49:11 -0200 | [diff] [blame] | 205 | unsigned char *bufs; |
| 206 | |
| 207 | if (dev->state & DEV_DISCONNECTED) |
| 208 | return(-ENODEV); |
| 209 | |
| 210 | bufs = kmalloc(len, GFP_KERNEL); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 211 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 212 | em28xx_regdbg("req=%02x reg=%02x:", req, reg); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 213 | |
| 214 | if (reg_debug) { |
| 215 | int i; |
| 216 | for (i = 0; i < len; ++i) |
| 217 | printk (" %02x", (unsigned char)buf[i]); |
| 218 | printk ("\n"); |
| 219 | } |
| 220 | |
| 221 | if (!bufs) |
| 222 | return -ENOMEM; |
| 223 | memcpy(bufs, buf, len); |
| 224 | ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), req, |
| 225 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| 226 | 0x0000, reg, bufs, len, HZ); |
Markus Rechberger | 9f38724 | 2006-02-07 06:49:11 -0200 | [diff] [blame] | 227 | msleep(5); /* FIXME: magic number */ |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 228 | kfree(bufs); |
| 229 | return ret; |
| 230 | } |
| 231 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 232 | int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 233 | { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 234 | return em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 235 | } |
| 236 | |
| 237 | /* |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 238 | * em28xx_write_reg_bits() |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 239 | * sets only some bits (specified by bitmask) of a register, by first reading |
| 240 | * the actual value |
| 241 | */ |
Adrian Bunk | 532fe65 | 2008-01-28 22:10:48 -0300 | [diff] [blame] | 242 | static int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val, |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 243 | u8 bitmask) |
| 244 | { |
| 245 | int oldval; |
| 246 | u8 newval; |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 247 | if ((oldval = em28xx_read_reg(dev, reg)) < 0) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 248 | return oldval; |
| 249 | newval = (((u8) oldval) & ~bitmask) | (val & bitmask); |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 250 | return em28xx_write_regs(dev, reg, &newval, 1); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | /* |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 254 | * em28xx_write_ac97() |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 255 | * write a 16 bit value to the specified AC97 address (LSB first!) |
| 256 | */ |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 257 | static int em28xx_write_ac97(struct em28xx *dev, u8 reg, u8 *val) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 258 | { |
Mauro Carvalho Chehab | 00b8730 | 2008-02-06 18:34:13 -0300 | [diff] [blame] | 259 | int ret, i; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 260 | u8 addr = reg & 0x7f; |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 261 | if ((ret = em28xx_write_regs(dev, AC97LSB_REG, val, 2)) < 0) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 262 | return ret; |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 263 | if ((ret = em28xx_write_regs(dev, AC97ADDR_REG, &addr, 1)) < 0) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 264 | return ret; |
Mauro Carvalho Chehab | 00b8730 | 2008-02-06 18:34:13 -0300 | [diff] [blame] | 265 | |
| 266 | /* Wait up to 50 ms for AC97 command to complete */ |
| 267 | for (i = 0; i < 10; i++) { |
| 268 | if ((ret = em28xx_read_reg(dev, AC97BUSY_REG)) < 0) |
| 269 | return ret; |
| 270 | if (!((u8) ret) & 0x01) |
| 271 | return 0; |
| 272 | msleep(5); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 273 | } |
Mauro Carvalho Chehab | 00b8730 | 2008-02-06 18:34:13 -0300 | [diff] [blame] | 274 | em28xx_warn ("AC97 command still being executed: not handled properly!\n"); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 275 | return 0; |
| 276 | } |
| 277 | |
Mauro Carvalho Chehab | 00b8730 | 2008-02-06 18:34:13 -0300 | [diff] [blame] | 278 | static int em28xx_set_audio_source(struct em28xx *dev) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 279 | { |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 280 | static char *enable = "\x08\x08"; |
| 281 | static char *disable = "\x08\x88"; |
| 282 | char *video = enable, *line = disable; |
Andrew Morton | 1685a6f | 2008-02-05 07:37:21 -0300 | [diff] [blame] | 283 | int ret; |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 284 | u8 input; |
| 285 | |
| 286 | if (dev->is_em2800) { |
| 287 | if (dev->ctl_ainput) |
| 288 | input = EM2800_AUDIO_SRC_LINE; |
| 289 | else |
| 290 | input = EM2800_AUDIO_SRC_TUNER; |
| 291 | |
| 292 | ret = em28xx_write_regs(dev, EM2800_AUDIOSRC_REG, &input, 1); |
| 293 | if (ret < 0) |
| 294 | return ret; |
| 295 | } |
| 296 | |
| 297 | if (dev->has_msp34xx) |
| 298 | input = EM28XX_AUDIO_SRC_TUNER; |
| 299 | else { |
| 300 | switch (dev->ctl_ainput) { |
| 301 | case EM28XX_AMUX_VIDEO: |
| 302 | input = EM28XX_AUDIO_SRC_TUNER; |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 303 | break; |
| 304 | case EM28XX_AMUX_LINE_IN: |
| 305 | input = EM28XX_AUDIO_SRC_LINE; |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 306 | break; |
| 307 | case EM28XX_AMUX_AC97_VIDEO: |
| 308 | input = EM28XX_AUDIO_SRC_LINE; |
| 309 | break; |
| 310 | case EM28XX_AMUX_AC97_LINE_IN: |
| 311 | input = EM28XX_AUDIO_SRC_LINE; |
| 312 | video = disable; |
| 313 | line = enable; |
| 314 | break; |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | ret = em28xx_write_reg_bits(dev, AUDIOSRC_REG, input, 0xc0); |
| 319 | if (ret < 0) |
| 320 | return ret; |
Mauro Carvalho Chehab | 00b8730 | 2008-02-06 18:34:13 -0300 | [diff] [blame] | 321 | msleep(5); |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 322 | |
Mauro Carvalho Chehab | 7463dda | 2008-02-05 22:29:26 -0300 | [diff] [blame] | 323 | /* Sets AC97 mixer registers |
| 324 | This is seems to be needed, even for non-ac97 configs |
| 325 | */ |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 326 | ret = em28xx_write_ac97(dev, VIDEO_AC97, video); |
| 327 | if (ret < 0) |
| 328 | return ret; |
| 329 | |
| 330 | ret = em28xx_write_ac97(dev, LINE_IN_AC97, line); |
| 331 | |
| 332 | return ret; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 333 | } |
| 334 | |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 335 | int em28xx_audio_analog_set(struct em28xx *dev) |
| 336 | { |
| 337 | int ret; |
| 338 | char s[2] = { 0x00, 0x00 }; |
Mauro Carvalho Chehab | 3abee53 | 2008-01-05 17:01:41 -0300 | [diff] [blame] | 339 | u8 xclk = 0x07; |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 340 | |
| 341 | s[0] |= 0x1f - dev->volume; |
| 342 | s[1] |= 0x1f - dev->volume; |
| 343 | |
Mauro Carvalho Chehab | 00b8730 | 2008-02-06 18:34:13 -0300 | [diff] [blame] | 344 | /* Mute */ |
| 345 | s[1] |= 0x80; |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 346 | ret = em28xx_write_ac97(dev, MASTER_AC97, s); |
Mauro Carvalho Chehab | 00b8730 | 2008-02-06 18:34:13 -0300 | [diff] [blame] | 347 | |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 348 | if (ret < 0) |
| 349 | return ret; |
| 350 | |
Mauro Carvalho Chehab | 3abee53 | 2008-01-05 17:01:41 -0300 | [diff] [blame] | 351 | if (dev->has_12mhz_i2s) |
| 352 | xclk |= 0x20; |
| 353 | |
| 354 | if (!dev->mute) |
| 355 | xclk |= 0x80; |
| 356 | |
| 357 | ret = em28xx_write_reg_bits(dev, XCLK_REG, xclk, 0xa7); |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 358 | if (ret < 0) |
| 359 | return ret; |
Mauro Carvalho Chehab | 3abee53 | 2008-01-05 17:01:41 -0300 | [diff] [blame] | 360 | msleep(10); |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 361 | |
| 362 | /* Selects the proper audio input */ |
| 363 | ret = em28xx_set_audio_source(dev); |
| 364 | |
Mauro Carvalho Chehab | 00b8730 | 2008-02-06 18:34:13 -0300 | [diff] [blame] | 365 | /* Unmute device */ |
| 366 | if (!dev->mute) |
| 367 | s[1] &= ~0x80; |
| 368 | ret = em28xx_write_ac97(dev, MASTER_AC97, s); |
| 369 | |
Mauro Carvalho Chehab | 539c96d | 2008-01-05 09:53:54 -0300 | [diff] [blame] | 370 | return ret; |
| 371 | } |
| 372 | EXPORT_SYMBOL_GPL(em28xx_audio_analog_set); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 373 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 374 | int em28xx_colorlevels_set_default(struct em28xx *dev) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 375 | { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 376 | em28xx_write_regs(dev, YGAIN_REG, "\x10", 1); /* contrast */ |
| 377 | em28xx_write_regs(dev, YOFFSET_REG, "\x00", 1); /* brightness */ |
| 378 | em28xx_write_regs(dev, UVGAIN_REG, "\x10", 1); /* saturation */ |
| 379 | em28xx_write_regs(dev, UOFFSET_REG, "\x00", 1); |
| 380 | em28xx_write_regs(dev, VOFFSET_REG, "\x00", 1); |
| 381 | em28xx_write_regs(dev, SHARPNESS_REG, "\x00", 1); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 382 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 383 | em28xx_write_regs(dev, GAMMA_REG, "\x20", 1); |
| 384 | em28xx_write_regs(dev, RGAIN_REG, "\x20", 1); |
| 385 | em28xx_write_regs(dev, GGAIN_REG, "\x20", 1); |
| 386 | em28xx_write_regs(dev, BGAIN_REG, "\x20", 1); |
| 387 | em28xx_write_regs(dev, ROFFSET_REG, "\x00", 1); |
| 388 | em28xx_write_regs(dev, GOFFSET_REG, "\x00", 1); |
| 389 | return em28xx_write_regs(dev, BOFFSET_REG, "\x00", 1); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 390 | } |
| 391 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 392 | int em28xx_capture_start(struct em28xx *dev, int start) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 393 | { |
| 394 | int ret; |
| 395 | /* FIXME: which is the best order? */ |
| 396 | /* video registers are sampled by VREF */ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 397 | if ((ret = em28xx_write_reg_bits(dev, USBSUSP_REG, start ? 0x10 : 0x00, |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 398 | 0x10)) < 0) |
| 399 | return ret; |
| 400 | /* enable video capture */ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 401 | return em28xx_write_regs(dev, VINENABLE_REG, start ? "\x67" : "\x27", 1); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 402 | } |
| 403 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 404 | int em28xx_outfmt_set_yuv422(struct em28xx *dev) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 405 | { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 406 | em28xx_write_regs(dev, OUTFMT_REG, "\x34", 1); |
| 407 | em28xx_write_regs(dev, VINMODE_REG, "\x10", 1); |
| 408 | return em28xx_write_regs(dev, VINCTRL_REG, "\x11", 1); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 409 | } |
| 410 | |
Adrian Bunk | adcb0fa | 2006-05-22 10:31:42 -0300 | [diff] [blame] | 411 | static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax, |
| 412 | u8 ymin, u8 ymax) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 413 | { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 414 | em28xx_coredbg("em28xx Scale: (%d,%d)-(%d,%d)\n", xmin, ymin, xmax, ymax); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 415 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 416 | em28xx_write_regs(dev, XMIN_REG, &xmin, 1); |
| 417 | em28xx_write_regs(dev, XMAX_REG, &xmax, 1); |
| 418 | em28xx_write_regs(dev, YMIN_REG, &ymin, 1); |
| 419 | return em28xx_write_regs(dev, YMAX_REG, &ymax, 1); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 420 | } |
| 421 | |
Adrian Bunk | adcb0fa | 2006-05-22 10:31:42 -0300 | [diff] [blame] | 422 | static int em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart, |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 423 | u16 width, u16 height) |
| 424 | { |
| 425 | u8 cwidth = width; |
| 426 | u8 cheight = height; |
| 427 | u8 overflow = (height >> 7 & 0x02) | (width >> 8 & 0x01); |
| 428 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 429 | em28xx_coredbg("em28xx Area Set: (%d,%d)\n", (width | (overflow & 2) << 7), |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 430 | (height | (overflow & 1) << 8)); |
| 431 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 432 | em28xx_write_regs(dev, HSTART_REG, &hstart, 1); |
| 433 | em28xx_write_regs(dev, VSTART_REG, &vstart, 1); |
| 434 | em28xx_write_regs(dev, CWIDTH_REG, &cwidth, 1); |
| 435 | em28xx_write_regs(dev, CHEIGHT_REG, &cheight, 1); |
| 436 | return em28xx_write_regs(dev, OFLOW_REG, &overflow, 1); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 437 | } |
| 438 | |
Adrian Bunk | adcb0fa | 2006-05-22 10:31:42 -0300 | [diff] [blame] | 439 | static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 440 | { |
Sascha Sommer | 52c02fc | 2005-11-08 21:38:10 -0800 | [diff] [blame] | 441 | u8 mode; |
| 442 | /* the em2800 scaler only supports scaling down to 50% */ |
| 443 | if(dev->is_em2800) |
| 444 | mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00); |
| 445 | else { |
| 446 | u8 buf[2]; |
| 447 | buf[0] = h; |
| 448 | buf[1] = h >> 8; |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 449 | em28xx_write_regs(dev, HSCALELOW_REG, (char *)buf, 2); |
Sascha Sommer | 52c02fc | 2005-11-08 21:38:10 -0800 | [diff] [blame] | 450 | buf[0] = v; |
| 451 | buf[1] = v >> 8; |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 452 | em28xx_write_regs(dev, VSCALELOW_REG, (char *)buf, 2); |
Sascha Sommer | 52c02fc | 2005-11-08 21:38:10 -0800 | [diff] [blame] | 453 | /* it seems that both H and V scalers must be active to work correctly */ |
| 454 | mode = (h || v)? 0x30: 0x00; |
Sascha Sommer | 74458e6 | 2005-11-08 21:37:33 -0800 | [diff] [blame] | 455 | } |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 456 | return em28xx_write_reg_bits(dev, COMPR_REG, mode, 0x30); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | /* FIXME: this only function read values from dev */ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 460 | int em28xx_resolution_set(struct em28xx *dev) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 461 | { |
| 462 | int width, height; |
| 463 | width = norm_maxw(dev); |
| 464 | height = norm_maxh(dev) >> 1; |
| 465 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 466 | em28xx_outfmt_set_yuv422(dev); |
| 467 | em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2); |
| 468 | em28xx_capture_area_set(dev, 0, 0, width >> 2, height >> 2); |
| 469 | return em28xx_scaler_set(dev, dev->hscale, dev->vscale); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | |
| 473 | /******************* isoc transfer handling ****************************/ |
| 474 | |
| 475 | #ifdef ENABLE_DEBUG_ISOC_FRAMES |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 476 | static void em28xx_isoc_dump(struct urb *urb) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 477 | { |
| 478 | int len = 0; |
| 479 | int ntrans = 0; |
| 480 | int i; |
| 481 | |
| 482 | printk(KERN_DEBUG "isocIrq: sf=%d np=%d ec=%x\n", |
| 483 | urb->start_frame, urb->number_of_packets, |
| 484 | urb->error_count); |
| 485 | for (i = 0; i < urb->number_of_packets; i++) { |
| 486 | unsigned char *buf = |
| 487 | urb->transfer_buffer + |
| 488 | urb->iso_frame_desc[i].offset; |
| 489 | int alen = urb->iso_frame_desc[i].actual_length; |
| 490 | if (alen > 0) { |
| 491 | if (buf[0] == 0x88) { |
| 492 | ntrans++; |
| 493 | len += alen; |
| 494 | } else if (buf[0] == 0x22) { |
| 495 | printk(KERN_DEBUG |
| 496 | "= l=%d nt=%d bpp=%d\n", |
| 497 | len - 4 * ntrans, ntrans, |
| 498 | ntrans == 0 ? 0 : len / ntrans); |
| 499 | ntrans = 1; |
| 500 | len = alen; |
| 501 | } else |
| 502 | printk(KERN_DEBUG "!\n"); |
| 503 | } |
| 504 | printk(KERN_DEBUG " n=%d s=%d al=%d %x\n", i, |
| 505 | urb->iso_frame_desc[i].status, |
| 506 | urb->iso_frame_desc[i].actual_length, |
| 507 | (unsigned int) |
| 508 | *((unsigned char *)(urb->transfer_buffer + |
| 509 | urb->iso_frame_desc[i]. |
| 510 | offset))); |
| 511 | } |
| 512 | } |
| 513 | #endif |
| 514 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 515 | static inline int em28xx_isoc_video(struct em28xx *dev,struct em28xx_frame_t **f, |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 516 | unsigned long *lock_flags, unsigned char buf) |
| 517 | { |
| 518 | if (!(buf & 0x01)) { |
| 519 | if ((*f)->state == F_GRABBING) { |
| 520 | /*previous frame is incomplete */ |
| 521 | if ((*f)->fieldbytesused < dev->field_size) { |
| 522 | (*f)->state = F_ERROR; |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 523 | em28xx_isocdbg ("dropping incomplete bottom field (%i missing bytes)", |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 524 | dev->field_size-(*f)->fieldbytesused); |
| 525 | } else { |
| 526 | (*f)->state = F_DONE; |
| 527 | (*f)->buf.bytesused = dev->frame_size; |
| 528 | } |
| 529 | } |
| 530 | if ((*f)->state == F_DONE || (*f)->state == F_ERROR) { |
| 531 | /* move current frame to outqueue and get next free buffer from inqueue */ |
| 532 | spin_lock_irqsave(&dev-> queue_lock, *lock_flags); |
| 533 | list_move_tail(&(*f)->frame, &dev->outqueue); |
| 534 | if (!list_empty(&dev->inqueue)) |
| 535 | (*f) = list_entry(dev-> inqueue.next, |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 536 | struct em28xx_frame_t,frame); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 537 | else |
| 538 | (*f) = NULL; |
| 539 | spin_unlock_irqrestore(&dev->queue_lock,*lock_flags); |
| 540 | } |
| 541 | if (!(*f)) { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 542 | em28xx_isocdbg ("new frame but no buffer is free"); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 543 | return -1; |
| 544 | } |
| 545 | do_gettimeofday(&(*f)->buf.timestamp); |
| 546 | (*f)->buf.sequence = ++dev->frame_count; |
| 547 | (*f)->buf.field = V4L2_FIELD_INTERLACED; |
| 548 | (*f)->state = F_GRABBING; |
| 549 | (*f)->buf.bytesused = 0; |
| 550 | (*f)->top_field = 1; |
| 551 | (*f)->fieldbytesused = 0; |
| 552 | } else { |
| 553 | /* acquiring bottom field */ |
| 554 | if ((*f)->state == F_GRABBING) { |
| 555 | if (!(*f)->top_field) { |
| 556 | (*f)->state = F_ERROR; |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 557 | em28xx_isocdbg ("unexpected begin of bottom field; discarding it"); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 558 | } else if ((*f)-> fieldbytesused < dev->field_size - 172) { |
| 559 | (*f)->state = F_ERROR; |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 560 | em28xx_isocdbg ("dropping incomplete top field (%i missing bytes)", |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 561 | dev->field_size-(*f)->fieldbytesused); |
| 562 | } else { |
| 563 | (*f)->top_field = 0; |
| 564 | (*f)->fieldbytesused = 0; |
| 565 | } |
| 566 | } |
| 567 | } |
| 568 | return (0); |
| 569 | } |
| 570 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 571 | static inline void em28xx_isoc_video_copy(struct em28xx *dev, |
| 572 | struct em28xx_frame_t **f, unsigned char *buf, int len) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 573 | { |
| 574 | void *fieldstart, *startwrite, *startread; |
| 575 | int linesdone, currlinedone, offset, lencopy,remain; |
| 576 | |
Mauro Carvalho Chehab | 596d92d | 2005-11-08 21:37:24 -0800 | [diff] [blame] | 577 | if(dev->frame_size != (*f)->buf.length){ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 578 | em28xx_err("frame_size %i and buf.length %i are different!!!\n",dev->frame_size,(*f)->buf.length); |
Mauro Carvalho Chehab | 596d92d | 2005-11-08 21:37:24 -0800 | [diff] [blame] | 579 | return; |
| 580 | } |
| 581 | |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 582 | if ((*f)->fieldbytesused + len > dev->field_size) |
| 583 | len =dev->field_size - (*f)->fieldbytesused; |
Mauro Carvalho Chehab | feff048 | 2005-11-08 21:38:16 -0800 | [diff] [blame] | 584 | |
| 585 | if (buf[0] != 0x88 && buf[0] != 0x22) { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 586 | em28xx_isocdbg("frame is not complete\n"); |
Mauro Carvalho Chehab | feff048 | 2005-11-08 21:38:16 -0800 | [diff] [blame] | 587 | startread = buf; |
| 588 | len+=4; |
| 589 | } else |
| 590 | startread = buf + 4; |
| 591 | |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 592 | remain = len; |
Mauro Carvalho Chehab | feff048 | 2005-11-08 21:38:16 -0800 | [diff] [blame] | 593 | |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 594 | if ((*f)->top_field) |
| 595 | fieldstart = (*f)->bufmem; |
| 596 | else |
| 597 | fieldstart = (*f)->bufmem + dev->bytesperline; |
| 598 | |
| 599 | linesdone = (*f)->fieldbytesused / dev->bytesperline; |
| 600 | currlinedone = (*f)->fieldbytesused % dev->bytesperline; |
| 601 | offset = linesdone * dev->bytesperline * 2 + currlinedone; |
| 602 | startwrite = fieldstart + offset; |
| 603 | lencopy = dev->bytesperline - currlinedone; |
| 604 | lencopy = lencopy > remain ? remain : lencopy; |
| 605 | |
| 606 | memcpy(startwrite, startread, lencopy); |
| 607 | remain -= lencopy; |
| 608 | |
| 609 | while (remain > 0) { |
| 610 | startwrite += lencopy + dev->bytesperline; |
| 611 | startread += lencopy; |
| 612 | if (dev->bytesperline > remain) |
| 613 | lencopy = remain; |
| 614 | else |
| 615 | lencopy = dev->bytesperline; |
| 616 | |
| 617 | memcpy(startwrite, startread, lencopy); |
| 618 | remain -= lencopy; |
| 619 | } |
| 620 | |
| 621 | (*f)->fieldbytesused += len; |
| 622 | } |
| 623 | |
| 624 | /* |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 625 | * em28xx_isoIrq() |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 626 | * handles the incoming isoc urbs and fills the frames from our inqueue |
| 627 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 628 | static void em28xx_isocIrq(struct urb *urb) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 629 | { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 630 | struct em28xx *dev = urb->context; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 631 | int i, status; |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 632 | struct em28xx_frame_t **f; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 633 | unsigned long lock_flags; |
| 634 | |
| 635 | if (!dev) |
| 636 | return; |
| 637 | #ifdef ENABLE_DEBUG_ISOC_FRAMES |
| 638 | if (isoc_debug>1) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 639 | em28xx_isoc_dump(urb); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 640 | #endif |
| 641 | |
| 642 | if (urb->status == -ENOENT) |
| 643 | return; |
| 644 | |
| 645 | f = &dev->frame_current; |
| 646 | |
| 647 | if (dev->stream == STREAM_INTERRUPT) { |
| 648 | dev->stream = STREAM_OFF; |
| 649 | if ((*f)) |
| 650 | (*f)->state = F_QUEUED; |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 651 | em28xx_isocdbg("stream interrupted"); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 652 | wake_up_interruptible(&dev->wait_stream); |
| 653 | } |
| 654 | |
| 655 | if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) |
| 656 | return; |
| 657 | |
| 658 | if (dev->stream == STREAM_ON && !list_empty(&dev->inqueue)) { |
| 659 | if (!(*f)) |
| 660 | (*f) = list_entry(dev->inqueue.next, |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 661 | struct em28xx_frame_t, frame); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 662 | |
| 663 | for (i = 0; i < urb->number_of_packets; i++) { |
| 664 | unsigned char *buf = urb->transfer_buffer + |
| 665 | urb->iso_frame_desc[i].offset; |
| 666 | int len = urb->iso_frame_desc[i].actual_length - 4; |
| 667 | |
| 668 | if (urb->iso_frame_desc[i].status) { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 669 | em28xx_isocdbg("data error: [%d] len=%d, status=%d", i, |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 670 | urb->iso_frame_desc[i].actual_length, |
| 671 | urb->iso_frame_desc[i].status); |
Mauro Carvalho Chehab | feff048 | 2005-11-08 21:38:16 -0800 | [diff] [blame] | 672 | if (urb->iso_frame_desc[i].status != -EPROTO) |
| 673 | continue; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 674 | } |
| 675 | if (urb->iso_frame_desc[i].actual_length <= 0) { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 676 | em28xx_isocdbg("packet %d is empty",i); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 677 | continue; |
| 678 | } |
| 679 | if (urb->iso_frame_desc[i].actual_length > |
Mauro Carvalho Chehab | 3687e1e | 2008-02-08 15:44:25 -0300 | [diff] [blame^] | 680 | urb->iso_frame_desc[i].length) { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 681 | em28xx_isocdbg("packet bigger than packet size"); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 682 | continue; |
| 683 | } |
| 684 | /*new frame */ |
| 685 | if (buf[0] == 0x22 && buf[1] == 0x5a) { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 686 | em28xx_isocdbg("Video frame, length=%i!",len); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 687 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 688 | if (em28xx_isoc_video(dev,f,&lock_flags,buf[2])) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 689 | break; |
| 690 | } else if (buf[0]==0x33 && buf[1]==0x95 && buf[2]==0x00) { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 691 | em28xx_isocdbg("VBI HEADER!!!"); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 692 | } |
| 693 | |
| 694 | /* actual copying */ |
| 695 | if ((*f)->state == F_GRABBING) { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 696 | em28xx_isoc_video_copy(dev,f,buf, len); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 697 | } |
| 698 | } |
| 699 | } |
| 700 | |
| 701 | for (i = 0; i < urb->number_of_packets; i++) { |
| 702 | urb->iso_frame_desc[i].status = 0; |
| 703 | urb->iso_frame_desc[i].actual_length = 0; |
| 704 | } |
| 705 | |
| 706 | urb->status = 0; |
| 707 | if ((status = usb_submit_urb(urb, GFP_ATOMIC))) { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 708 | em28xx_errdev("resubmit of urb failed (error=%i)\n", status); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 709 | dev->state |= DEV_MISCONFIGURED; |
| 710 | } |
| 711 | wake_up_interruptible(&dev->wait_frame); |
| 712 | return; |
| 713 | } |
| 714 | |
| 715 | /* |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 716 | * em28xx_uninit_isoc() |
| 717 | * deallocates the buffers and urbs allocated during em28xx_init_iosc() |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 718 | */ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 719 | void em28xx_uninit_isoc(struct em28xx *dev) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 720 | { |
| 721 | int i; |
| 722 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 723 | for (i = 0; i < EM28XX_NUM_BUFS; i++) { |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 724 | if (dev->urb[i]) { |
| 725 | usb_kill_urb(dev->urb[i]); |
Mauro Carvalho Chehab | 3687e1e | 2008-02-08 15:44:25 -0300 | [diff] [blame^] | 726 | if (dev->transfer_buffer[i]) { |
| 727 | usb_buffer_free(dev->udev, |
| 728 | dev->urb[i]->transfer_buffer_length, |
| 729 | dev->transfer_buffer[i], |
| 730 | dev->urb[i]->transfer_dma); |
Markus Rechberger | 02f7427 | 2005-11-08 21:37:46 -0800 | [diff] [blame] | 731 | } |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 732 | usb_free_urb(dev->urb[i]); |
| 733 | } |
| 734 | dev->urb[i] = NULL; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 735 | dev->transfer_buffer[i] = NULL; |
| 736 | } |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 737 | em28xx_capture_start(dev, 0); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 738 | } |
| 739 | |
| 740 | /* |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 741 | * em28xx_init_isoc() |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 742 | * allocates transfer buffers and submits the urbs for isoc transfer |
| 743 | */ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 744 | int em28xx_init_isoc(struct em28xx *dev) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 745 | { |
Florin Malita | e7222ca | 2007-10-15 12:59:18 -0300 | [diff] [blame] | 746 | /* change interface to 3 which allows the biggest packet sizes */ |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 747 | int i, errCode; |
Mauro Carvalho Chehab | 3687e1e | 2008-02-08 15:44:25 -0300 | [diff] [blame^] | 748 | int sb_size; |
| 749 | |
| 750 | em28xx_set_alternate(dev); |
| 751 | sb_size = EM28XX_NUM_PACKETS * dev->max_pkt_size; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 752 | |
| 753 | /* reset streaming vars */ |
| 754 | dev->frame_current = NULL; |
| 755 | dev->frame_count = 0; |
| 756 | |
| 757 | /* allocate urbs */ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 758 | for (i = 0; i < EM28XX_NUM_BUFS; i++) { |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 759 | struct urb *urb; |
Mauro Carvalho Chehab | 3687e1e | 2008-02-08 15:44:25 -0300 | [diff] [blame^] | 760 | int j; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 761 | /* allocate transfer buffer */ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 762 | urb = usb_alloc_urb(EM28XX_NUM_PACKETS, GFP_KERNEL); |
Markus Rechberger | 02f7427 | 2005-11-08 21:37:46 -0800 | [diff] [blame] | 763 | if (!urb){ |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 764 | em28xx_errdev("cannot alloc urb %i\n", i); |
| 765 | em28xx_uninit_isoc(dev); |
Markus Rechberger | 02f7427 | 2005-11-08 21:37:46 -0800 | [diff] [blame] | 766 | return -ENOMEM; |
| 767 | } |
Mauro Carvalho Chehab | 3687e1e | 2008-02-08 15:44:25 -0300 | [diff] [blame^] | 768 | dev->transfer_buffer[i] = usb_buffer_alloc(dev->udev, sb_size, |
| 769 | GFP_KERNEL, |
| 770 | &urb->transfer_dma); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 771 | if (!dev->transfer_buffer[i]) { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 772 | em28xx_errdev |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 773 | ("unable to allocate %i bytes for transfer buffer %i\n", |
| 774 | sb_size, i); |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 775 | em28xx_uninit_isoc(dev); |
Florin Malita | e7222ca | 2007-10-15 12:59:18 -0300 | [diff] [blame] | 776 | usb_free_urb(urb); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 777 | return -ENOMEM; |
| 778 | } |
| 779 | memset(dev->transfer_buffer[i], 0, sb_size); |
Markus Rechberger | 02f7427 | 2005-11-08 21:37:46 -0800 | [diff] [blame] | 780 | urb->dev = dev->udev; |
| 781 | urb->context = dev; |
| 782 | urb->pipe = usb_rcvisocpipe(dev->udev, 0x82); |
| 783 | urb->transfer_flags = URB_ISO_ASAP; |
| 784 | urb->interval = 1; |
| 785 | urb->transfer_buffer = dev->transfer_buffer[i]; |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 786 | urb->complete = em28xx_isocIrq; |
| 787 | urb->number_of_packets = EM28XX_NUM_PACKETS; |
Markus Rechberger | 02f7427 | 2005-11-08 21:37:46 -0800 | [diff] [blame] | 788 | urb->transfer_buffer_length = sb_size; |
Mauro Carvalho Chehab | 3687e1e | 2008-02-08 15:44:25 -0300 | [diff] [blame^] | 789 | for (j = 0; j < EM28XX_NUM_PACKETS; j++) { |
| 790 | urb->iso_frame_desc[j].offset = j * dev->max_pkt_size; |
| 791 | urb->iso_frame_desc[j].length = dev->max_pkt_size; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 792 | } |
Markus Rechberger | 02f7427 | 2005-11-08 21:37:46 -0800 | [diff] [blame] | 793 | dev->urb[i] = urb; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 794 | } |
| 795 | |
| 796 | /* submit urbs */ |
Mauro Carvalho Chehab | 3687e1e | 2008-02-08 15:44:25 -0300 | [diff] [blame^] | 797 | em28xx_coredbg("Submitting %d urbs of %d packets (%d each)\n", |
| 798 | EM28XX_NUM_BUFS, EM28XX_NUM_PACKETS, dev->max_pkt_size); |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 799 | for (i = 0; i < EM28XX_NUM_BUFS; i++) { |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 800 | errCode = usb_submit_urb(dev->urb[i], GFP_KERNEL); |
| 801 | if (errCode) { |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 802 | em28xx_errdev("submit of urb %i failed (error=%i)\n", i, |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 803 | errCode); |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 804 | em28xx_uninit_isoc(dev); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 805 | return errCode; |
| 806 | } |
| 807 | } |
| 808 | |
| 809 | return 0; |
| 810 | } |
| 811 | |
Mauro Carvalho Chehab | 3acf280 | 2005-11-08 21:38:27 -0800 | [diff] [blame] | 812 | int em28xx_set_alternate(struct em28xx *dev) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 813 | { |
| 814 | int errCode, prev_alt = dev->alt; |
Mauro Carvalho Chehab | 3687e1e | 2008-02-08 15:44:25 -0300 | [diff] [blame^] | 815 | int i; |
| 816 | unsigned int min_pkt_size = dev->bytesperline+4; |
| 817 | |
| 818 | /* When image size is bigger than a ceirtain value, |
| 819 | the frame size should be increased, otherwise, only |
| 820 | green screen will be received. |
| 821 | */ |
| 822 | if (dev->frame_size > 720*240*2) |
| 823 | min_pkt_size *= 2; |
| 824 | |
| 825 | for (i = 0; i < dev->num_alt; i++) |
| 826 | if (dev->alt_max_pkt_size[i] >= min_pkt_size) |
| 827 | break; |
| 828 | dev->alt = i; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 829 | |
| 830 | if (dev->alt != prev_alt) { |
Mauro Carvalho Chehab | 3687e1e | 2008-02-08 15:44:25 -0300 | [diff] [blame^] | 831 | em28xx_coredbg("minimum isoc packet size: %u (alt=%d)\n", |
| 832 | min_pkt_size, dev->alt); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 833 | dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt]; |
Mauro Carvalho Chehab | 3687e1e | 2008-02-08 15:44:25 -0300 | [diff] [blame^] | 834 | em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n", |
| 835 | dev->alt, dev->max_pkt_size); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 836 | errCode = usb_set_interface(dev->udev, 0, dev->alt); |
| 837 | if (errCode < 0) { |
Mauro Carvalho Chehab | 9d4d9c0 | 2005-11-08 21:38:52 -0800 | [diff] [blame] | 838 | em28xx_errdev ("cannot change alternate number to %d (error=%i)\n", |
Mauro Carvalho Chehab | 3687e1e | 2008-02-08 15:44:25 -0300 | [diff] [blame^] | 839 | dev->alt, errCode); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 840 | return errCode; |
| 841 | } |
| 842 | } |
| 843 | return 0; |
| 844 | } |