Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1 | /* |
| 2 | * udlfb.c -- Framebuffer driver for DisplayLink USB controller |
| 3 | * |
| 4 | * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it> |
| 5 | * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com> |
| 6 | * |
| 7 | * This file is subject to the terms and conditions of the GNU General Public |
| 8 | * License v2. See the file COPYING in the main directory of this archive for |
| 9 | * more details. |
| 10 | * |
| 11 | * Layout is based on skeletonfb by James Simmons and Geert Uytterhoeven, |
| 12 | * usb-skeleton by GregKH. |
| 13 | * |
| 14 | * Device-specific portions based on information from Displaylink, with work |
| 15 | * from Florian Echtler, Henrik Bjerregaard Pedersen, and others. |
| 16 | */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 17 | |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/kernel.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/usb.h> |
| 22 | #include <linux/uaccess.h> |
| 23 | #include <linux/mm.h> |
| 24 | #include <linux/fb.h> |
| 25 | #include <linux/mutex.h> |
Amit Kucheria | fb29900 | 2009-07-27 12:01:03 +0300 | [diff] [blame] | 26 | #include <linux/vmalloc.h> |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 27 | |
| 28 | #include "udlfb.h" |
| 29 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 30 | #define DRIVER_VERSION "DisplayLink Framebuffer Driver 0.4.1" |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 31 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 32 | static struct fb_fix_screeninfo dlfb_fix = { |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 33 | .id = "displaylinkfb", |
| 34 | .type = FB_TYPE_PACKED_PIXELS, |
| 35 | .visual = FB_VISUAL_TRUECOLOR, |
| 36 | .xpanstep = 0, |
| 37 | .ypanstep = 0, |
| 38 | .ywrapstep = 0, |
| 39 | .accel = FB_ACCEL_NONE, |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 40 | }; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 41 | |
Bernie Thompson | cc403dc | 2010-02-15 06:45:49 -0800 | [diff] [blame] | 42 | /* |
| 43 | * There are many DisplayLink-based products, all with unique PIDs. We are able |
| 44 | * to support all volume ones (circa 2009) with a single driver, so we match |
| 45 | * globally on VID. TODO: Probe() needs to detect when we might be running |
| 46 | * "future" chips, and bail on those, so a compatible driver can match. |
| 47 | */ |
| 48 | static struct usb_device_id id_table[] = { |
| 49 | {.idVendor = 0x17e9, .match_flags = USB_DEVICE_ID_MATCH_VENDOR,}, |
| 50 | {}, |
| 51 | }; |
| 52 | MODULE_DEVICE_TABLE(usb, id_table); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 53 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 54 | /* dlfb keeps a list of urbs for efficient bulk transfers */ |
| 55 | static void dlfb_urb_completion(struct urb *urb); |
| 56 | static struct urb *dlfb_get_urb(struct dlfb_data *dev); |
| 57 | static int dlfb_submit_urb(struct dlfb_data *dev, struct urb * urb, size_t len); |
| 58 | static int dlfb_alloc_urb_list(struct dlfb_data *dev, int count, size_t size); |
| 59 | static void dlfb_free_urb_list(struct dlfb_data *dev); |
| 60 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 61 | /* |
| 62 | * Inserts a specific DisplayLink controller command into the provided |
| 63 | * buffer. |
| 64 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 65 | static char *dlfb_set_register(char *buf, u8 reg, u8 val) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 66 | { |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 67 | *buf++ = 0xAF; |
| 68 | *buf++ = 0x20; |
| 69 | *buf++ = reg; |
| 70 | *buf++ = val; |
| 71 | return buf; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 72 | } |
| 73 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 74 | static char *dlfb_vidreg_lock(char *buf) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 75 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 76 | return dlfb_set_register(buf, 0xFF, 0x00); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 77 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 78 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 79 | static char *dlfb_vidreg_unlock(char *buf) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 80 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 81 | return dlfb_set_register(buf, 0xFF, 0xFF); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 82 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 83 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 84 | /* |
| 85 | * Once you send this command, the DisplayLink framebuffer gets driven to the |
| 86 | * display. |
| 87 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 88 | static char *dlfb_enable_hvsync(char *buf) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 89 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 90 | return dlfb_set_register(buf, 0x1F, 0x00); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 91 | } |
| 92 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 93 | static char *dlfb_set_color_depth(char *buf, u8 selection) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 94 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 95 | return dlfb_set_register(buf, 0x00, selection); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 96 | } |
| 97 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 98 | static char *dlfb_set_base16bpp(char *wrptr, u32 base) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 99 | { |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 100 | /* the base pointer is 16 bits wide, 0x20 is hi byte. */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 101 | wrptr = dlfb_set_register(wrptr, 0x20, base >> 16); |
| 102 | wrptr = dlfb_set_register(wrptr, 0x21, base >> 8); |
| 103 | return dlfb_set_register(wrptr, 0x22, base); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 104 | } |
| 105 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 106 | static char *dlfb_set_base8bpp(char *wrptr, u32 base) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 107 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 108 | wrptr = dlfb_set_register(wrptr, 0x26, base >> 16); |
| 109 | wrptr = dlfb_set_register(wrptr, 0x27, base >> 8); |
| 110 | return dlfb_set_register(wrptr, 0x28, base); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 111 | } |
| 112 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 113 | static char *dlfb_set_register_16(char *wrptr, u8 reg, u16 value) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 114 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 115 | wrptr = dlfb_set_register(wrptr, reg, value >> 8); |
| 116 | return dlfb_set_register(wrptr, reg+1, value); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | /* |
| 120 | * This is kind of weird because the controller takes some |
| 121 | * register values in a different byte order than other registers. |
| 122 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 123 | static char *dlfb_set_register_16be(char *wrptr, u8 reg, u16 value) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 124 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 125 | wrptr = dlfb_set_register(wrptr, reg, value); |
| 126 | return dlfb_set_register(wrptr, reg+1, value >> 8); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | /* |
| 130 | * LFSR is linear feedback shift register. The reason we have this is |
| 131 | * because the display controller needs to minimize the clock depth of |
| 132 | * various counters used in the display path. So this code reverses the |
| 133 | * provided value into the lfsr16 value by counting backwards to get |
| 134 | * the value that needs to be set in the hardware comparator to get the |
| 135 | * same actual count. This makes sense once you read above a couple of |
| 136 | * times and think about it from a hardware perspective. |
| 137 | */ |
| 138 | static u16 lfsr16(u16 actual_count) |
| 139 | { |
| 140 | u32 lv = 0xFFFF; /* This is the lfsr value that the hw starts with */ |
| 141 | |
| 142 | while (actual_count--) { |
| 143 | lv = ((lv << 1) | |
| 144 | (((lv >> 15) ^ (lv >> 4) ^ (lv >> 2) ^ (lv >> 1)) & 1)) |
| 145 | & 0xFFFF; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 146 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 147 | |
| 148 | return (u16) lv; |
| 149 | } |
| 150 | |
| 151 | /* |
| 152 | * This does LFSR conversion on the value that is to be written. |
| 153 | * See LFSR explanation above for more detail. |
| 154 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 155 | static char *dlfb_set_register_lfsr16(char *wrptr, u8 reg, u16 value) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 156 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 157 | return dlfb_set_register_16(wrptr, reg, lfsr16(value)); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | /* |
| 161 | * This takes a standard fbdev screeninfo struct and all of its monitor mode |
| 162 | * details and converts them into the DisplayLink equivalent register commands. |
| 163 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 164 | static char *dlfb_set_vid_cmds(char *wrptr, struct fb_var_screeninfo *var) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 165 | { |
| 166 | u16 xds, yds; |
| 167 | u16 xde, yde; |
| 168 | u16 yec; |
| 169 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 170 | /* x display start */ |
| 171 | xds = var->left_margin + var->hsync_len; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 172 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x01, xds); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 173 | /* x display end */ |
| 174 | xde = xds + var->xres; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 175 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x03, xde); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 176 | |
| 177 | /* y display start */ |
| 178 | yds = var->upper_margin + var->vsync_len; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 179 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x05, yds); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 180 | /* y display end */ |
| 181 | yde = yds + var->yres; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 182 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x07, yde); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 183 | |
| 184 | /* x end count is active + blanking - 1 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 185 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x09, |
| 186 | xde + var->right_margin - 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 187 | |
| 188 | /* libdlo hardcodes hsync start to 1 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 189 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x0B, 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 190 | |
| 191 | /* hsync end is width of sync pulse + 1 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 192 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x0D, var->hsync_len + 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 193 | |
| 194 | /* hpixels is active pixels */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 195 | wrptr = dlfb_set_register_16(wrptr, 0x0F, var->xres); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 196 | |
| 197 | /* yendcount is vertical active + vertical blanking */ |
| 198 | yec = var->yres + var->upper_margin + var->lower_margin + |
| 199 | var->vsync_len; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 200 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x11, yec); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 201 | |
| 202 | /* libdlo hardcodes vsync start to 0 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 203 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x13, 0); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 204 | |
| 205 | /* vsync end is width of vsync pulse */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 206 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x15, var->vsync_len); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 207 | |
| 208 | /* vpixels is active pixels */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 209 | wrptr = dlfb_set_register_16(wrptr, 0x17, var->yres); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 210 | |
| 211 | /* convert picoseconds to 5kHz multiple for pclk5k = x * 1E12/5k */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 212 | wrptr = dlfb_set_register_16be(wrptr, 0x1B, |
| 213 | 200*1000*1000/var->pixclock); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 214 | |
| 215 | return wrptr; |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * This takes a standard fbdev screeninfo struct that was fetched or prepared |
| 220 | * and then generates the appropriate command sequence that then drives the |
| 221 | * display controller. |
| 222 | */ |
| 223 | static int dlfb_set_video_mode(struct dlfb_data *dev, |
| 224 | struct fb_var_screeninfo *var) |
| 225 | { |
| 226 | char *buf; |
| 227 | char *wrptr; |
| 228 | int retval = 0; |
| 229 | int writesize; |
| 230 | |
| 231 | buf = dev->buf; |
| 232 | |
| 233 | /* |
| 234 | * This first section has to do with setting the base address on the |
| 235 | * controller * associated with the display. There are 2 base |
| 236 | * pointers, currently, we only * use the 16 bpp segment. |
| 237 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 238 | wrptr = dlfb_vidreg_lock(buf); |
| 239 | wrptr = dlfb_set_color_depth(wrptr, 0x00); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 240 | /* set base for 16bpp segment to 0 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 241 | wrptr = dlfb_set_base16bpp(wrptr, 0); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 242 | /* set base for 8bpp segment to end of fb */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 243 | wrptr = dlfb_set_base8bpp(wrptr, dev->info->fix.smem_len); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 244 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 245 | wrptr = dlfb_set_vid_cmds(wrptr, var); |
| 246 | wrptr = dlfb_enable_hvsync(wrptr); |
| 247 | wrptr = dlfb_vidreg_unlock(wrptr); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 248 | |
| 249 | writesize = wrptr - buf; |
| 250 | |
| 251 | mutex_lock(&dev->bulk_mutex); |
| 252 | if (!dev->interface) { /* disconnect() was called */ |
| 253 | mutex_unlock(&dev->bulk_mutex); |
| 254 | retval = -ENODEV; |
| 255 | goto error; |
| 256 | } |
| 257 | |
| 258 | retval = dlfb_bulk_msg(dev, writesize); |
| 259 | mutex_unlock(&dev->bulk_mutex); |
| 260 | if (retval) { |
| 261 | dev_err(&dev->udev->dev, "Problem %d with submit write bulk.\n", |
| 262 | retval); |
| 263 | goto error; |
| 264 | } |
| 265 | |
| 266 | return 0; |
| 267 | |
| 268 | error: |
| 269 | return retval; |
| 270 | } |
| 271 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 272 | |
| 273 | /* |
| 274 | * Query EDID from the handware, then hand it off to fbdev's edid parse |
| 275 | * routine which should give us back a filled in screeninfo structure. |
| 276 | */ |
| 277 | static int dlfb_get_var_from_edid(struct dlfb_data *dev, |
| 278 | struct fb_var_screeninfo *var) |
| 279 | { |
| 280 | int ret; |
| 281 | |
| 282 | dlfb_edid(dev); |
| 283 | ret = fb_parse_edid(dev->edid, var); |
| 284 | |
| 285 | return ret; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 286 | } |
| 287 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 288 | static int dlfb_ops_mmap(struct fb_info *info, struct vm_area_struct *vma) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 289 | { |
| 290 | unsigned long start = vma->vm_start; |
| 291 | unsigned long size = vma->vm_end - vma->vm_start; |
| 292 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; |
| 293 | unsigned long page, pos; |
| 294 | |
| 295 | printk("MMAP: %lu %u\n", offset + size, info->fix.smem_len); |
| 296 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 297 | if (offset + size > info->fix.smem_len) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 298 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 299 | |
| 300 | pos = (unsigned long)info->fix.smem_start + offset; |
| 301 | |
| 302 | while (size > 0) { |
| 303 | page = vmalloc_to_pfn((void *)pos); |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 304 | if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 305 | return -EAGAIN; |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 306 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 307 | start += PAGE_SIZE; |
| 308 | pos += PAGE_SIZE; |
| 309 | if (size > PAGE_SIZE) |
| 310 | size -= PAGE_SIZE; |
| 311 | else |
| 312 | size = 0; |
| 313 | } |
| 314 | |
| 315 | vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ |
| 316 | return 0; |
| 317 | |
| 318 | } |
| 319 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 320 | /* ioctl structure */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 321 | struct dloarea { |
| 322 | int x, y; |
| 323 | int w, h; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 324 | int x2, y2; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 325 | }; |
| 326 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 327 | static struct usb_driver dlfb_driver; |
| 328 | |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 329 | /* thanks to Henrik Bjerregaard Pedersen for this function */ |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 330 | static char *rle_compress16(uint16_t * src, char *dst, int rem) |
| 331 | { |
| 332 | |
| 333 | int rl; |
| 334 | uint16_t pix0; |
| 335 | char *end_if_raw = dst + 6 + 2 * rem; |
| 336 | |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 337 | dst += 6; /* header will be filled in if RLE is worth it */ |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 338 | |
| 339 | while (rem && dst < end_if_raw) { |
| 340 | char *start = (char *)src; |
| 341 | |
| 342 | pix0 = *src++; |
| 343 | rl = 1; |
| 344 | rem--; |
| 345 | while (rem && *src == pix0) |
| 346 | rem--, rl++, src++; |
| 347 | *dst++ = rl; |
| 348 | *dst++ = start[1]; |
| 349 | *dst++ = start[0]; |
| 350 | } |
| 351 | |
| 352 | return dst; |
| 353 | } |
| 354 | |
| 355 | /* |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 356 | Thanks to Henrik Bjerregaard Pedersen for rle implementation |
| 357 | and code refactoring. Next step is huffman compression. |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 358 | */ |
| 359 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 360 | static int |
| 361 | image_blit(struct dlfb_data *dev_info, int x, int y, int width, int height, |
| 362 | char *data) |
| 363 | { |
| 364 | |
| 365 | int i, j, base; |
| 366 | int rem = width; |
| 367 | int ret; |
| 368 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 369 | int firstdiff, thistime; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 370 | |
| 371 | char *bufptr; |
| 372 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 373 | if (x + width > dev_info->info->var.xres) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 374 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 375 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 376 | if (y + height > dev_info->info->var.yres) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 377 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 378 | |
| 379 | mutex_lock(&dev_info->bulk_mutex); |
| 380 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 381 | base = |
| 382 | dev_info->base16 + ((dev_info->info->var.xres * 2 * y) + (x * 2)); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 383 | |
| 384 | data += (dev_info->info->var.xres * 2 * y) + (x * 2); |
| 385 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 386 | /* printk("IMAGE_BLIT\n"); */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 387 | |
| 388 | bufptr = dev_info->buf; |
| 389 | |
| 390 | for (i = y; i < y + height; i++) { |
| 391 | |
| 392 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 393 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 394 | bufptr = dev_info->buf; |
| 395 | } |
| 396 | |
| 397 | rem = width; |
| 398 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 399 | /* printk("WRITING LINE %d\n", i); */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 400 | |
| 401 | while (rem) { |
| 402 | |
| 403 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 404 | ret = |
| 405 | dlfb_bulk_msg(dev_info, |
| 406 | bufptr - dev_info->buf); |
| 407 | bufptr = dev_info->buf; |
| 408 | } |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 409 | /* number of pixels to consider this time */ |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 410 | thistime = rem; |
| 411 | if (thistime > 255) |
| 412 | thistime = 255; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 413 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 414 | if (dev_info->backing_buffer) { |
| 415 | /* find first pixel that has changed */ |
| 416 | firstdiff = -1; |
| 417 | for (j = 0; j < thistime * 2; j++) { |
| 418 | if (dev_info->backing_buffer |
| 419 | [base - dev_info->base16 + j] |
| 420 | != data[j]) { |
| 421 | firstdiff = j / 2; |
| 422 | break; |
| 423 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 424 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 425 | |
| 426 | } else { |
| 427 | firstdiff = 0; |
| 428 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 429 | } |
| 430 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 431 | if (firstdiff >= 0) { |
| 432 | char *end_of_rle; |
| 433 | |
| 434 | end_of_rle = |
| 435 | rle_compress16((uint16_t *) (data + |
| 436 | firstdiff * 2), |
| 437 | bufptr, |
| 438 | thistime - firstdiff); |
| 439 | |
| 440 | if (end_of_rle < |
| 441 | bufptr + 6 + 2 * (thistime - firstdiff)) { |
| 442 | bufptr[0] = 0xAF; |
| 443 | bufptr[1] = 0x69; |
| 444 | |
| 445 | bufptr[2] = |
| 446 | (char)((base + |
| 447 | firstdiff * 2) >> 16); |
| 448 | bufptr[3] = |
| 449 | (char)((base + firstdiff * 2) >> 8); |
| 450 | bufptr[4] = |
| 451 | (char)(base + firstdiff * 2); |
| 452 | bufptr[5] = thistime - firstdiff; |
| 453 | |
| 454 | bufptr = end_of_rle; |
| 455 | |
| 456 | } else { |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 457 | /* fallback to raw (or other?) */ |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 458 | *bufptr++ = 0xAF; |
| 459 | *bufptr++ = 0x68; |
| 460 | |
| 461 | *bufptr++ = |
| 462 | (char)((base + |
| 463 | firstdiff * 2) >> 16); |
| 464 | *bufptr++ = |
| 465 | (char)((base + firstdiff * 2) >> 8); |
| 466 | *bufptr++ = |
| 467 | (char)(base + firstdiff * 2); |
| 468 | *bufptr++ = thistime - firstdiff; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 469 | for (j = firstdiff * 2; |
| 470 | j < thistime * 2; j += 2) { |
| 471 | *bufptr++ = data[j + 1]; |
| 472 | *bufptr++ = data[j]; |
| 473 | } |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | base += thistime * 2; |
| 478 | data += thistime * 2; |
| 479 | rem -= thistime; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 480 | } |
| 481 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 482 | if (dev_info->backing_buffer) |
| 483 | memcpy(dev_info->backing_buffer + |
| 484 | (base - dev_info->base16) - |
| 485 | (width * 2), data - (width * 2), width * 2); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 486 | |
| 487 | base += (dev_info->info->var.xres * 2) - (width * 2); |
| 488 | data += (dev_info->info->var.xres * 2) - (width * 2); |
| 489 | |
| 490 | } |
| 491 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 492 | if (bufptr > dev_info->buf) { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 493 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 494 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 495 | |
| 496 | mutex_unlock(&dev_info->bulk_mutex); |
| 497 | |
| 498 | return base; |
| 499 | |
| 500 | } |
| 501 | |
| 502 | static int |
| 503 | draw_rect(struct dlfb_data *dev_info, int x, int y, int width, int height, |
| 504 | unsigned char red, unsigned char green, unsigned char blue) |
| 505 | { |
| 506 | |
| 507 | int i, j, base; |
| 508 | int ret; |
| 509 | unsigned short col = |
| 510 | (((((red) & 0xF8) | ((green) >> 5)) & 0xFF) << 8) + |
| 511 | (((((green) & 0x1C) << 3) | ((blue) >> 3)) & 0xFF); |
| 512 | int rem = width; |
| 513 | |
| 514 | char *bufptr; |
| 515 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 516 | if (x + width > dev_info->info->var.xres) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 517 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 518 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 519 | if (y + height > dev_info->info->var.yres) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 520 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 521 | |
| 522 | mutex_lock(&dev_info->bulk_mutex); |
| 523 | |
| 524 | base = dev_info->base16 + (dev_info->info->var.xres * 2 * y) + (x * 2); |
| 525 | |
| 526 | bufptr = dev_info->buf; |
| 527 | |
| 528 | for (i = y; i < y + height; i++) { |
| 529 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 530 | if (dev_info->backing_buffer) { |
| 531 | for (j = 0; j < width * 2; j += 2) { |
| 532 | dev_info->backing_buffer |
| 533 | [base - dev_info->base16 + j] = |
| 534 | (char)(col >> 8); |
| 535 | dev_info->backing_buffer |
| 536 | [base - dev_info->base16 + j + 1] = |
| 537 | (char)(col); |
| 538 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 539 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 540 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 541 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 542 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 543 | bufptr = dev_info->buf; |
| 544 | } |
| 545 | |
| 546 | rem = width; |
| 547 | |
| 548 | while (rem) { |
| 549 | |
| 550 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 551 | ret = |
| 552 | dlfb_bulk_msg(dev_info, |
| 553 | bufptr - dev_info->buf); |
| 554 | bufptr = dev_info->buf; |
| 555 | } |
| 556 | |
| 557 | *bufptr++ = 0xAF; |
| 558 | *bufptr++ = 0x69; |
| 559 | |
| 560 | *bufptr++ = (char)(base >> 16); |
| 561 | *bufptr++ = (char)(base >> 8); |
| 562 | *bufptr++ = (char)(base); |
| 563 | |
| 564 | if (rem > 255) { |
| 565 | *bufptr++ = 255; |
| 566 | *bufptr++ = 255; |
| 567 | rem -= 255; |
| 568 | base += 255 * 2; |
| 569 | } else { |
| 570 | *bufptr++ = rem; |
| 571 | *bufptr++ = rem; |
| 572 | base += rem * 2; |
| 573 | rem = 0; |
| 574 | } |
| 575 | |
| 576 | *bufptr++ = (char)(col >> 8); |
| 577 | *bufptr++ = (char)(col); |
| 578 | |
| 579 | } |
| 580 | |
| 581 | base += (dev_info->info->var.xres * 2) - (width * 2); |
| 582 | |
| 583 | } |
| 584 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 585 | if (bufptr > dev_info->buf) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 586 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 587 | |
| 588 | mutex_unlock(&dev_info->bulk_mutex); |
| 589 | |
| 590 | return 1; |
| 591 | } |
| 592 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 593 | static void swapfb(struct dlfb_data *dev_info) |
| 594 | { |
| 595 | |
| 596 | int tmpbase; |
| 597 | char *bufptr; |
| 598 | |
| 599 | mutex_lock(&dev_info->bulk_mutex); |
| 600 | |
| 601 | tmpbase = dev_info->base16; |
| 602 | |
| 603 | dev_info->base16 = dev_info->base16d; |
| 604 | dev_info->base16d = tmpbase; |
| 605 | |
| 606 | bufptr = dev_info->buf; |
| 607 | |
| 608 | bufptr = dlfb_set_register(bufptr, 0xFF, 0x00); |
| 609 | |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 610 | /* set addresses */ |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 611 | bufptr = |
| 612 | dlfb_set_register(bufptr, 0x20, (char)(dev_info->base16 >> 16)); |
| 613 | bufptr = dlfb_set_register(bufptr, 0x21, (char)(dev_info->base16 >> 8)); |
| 614 | bufptr = dlfb_set_register(bufptr, 0x22, (char)(dev_info->base16)); |
| 615 | |
| 616 | bufptr = dlfb_set_register(bufptr, 0xFF, 0x00); |
| 617 | |
| 618 | dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 619 | |
| 620 | mutex_unlock(&dev_info->bulk_mutex); |
| 621 | } |
| 622 | |
| 623 | static int copyfb(struct dlfb_data *dev_info) |
| 624 | { |
| 625 | int base; |
| 626 | int source; |
| 627 | int rem; |
| 628 | int i, ret; |
| 629 | |
| 630 | char *bufptr; |
| 631 | |
| 632 | base = dev_info->base16d; |
| 633 | |
| 634 | mutex_lock(&dev_info->bulk_mutex); |
| 635 | |
| 636 | source = dev_info->base16; |
| 637 | |
| 638 | bufptr = dev_info->buf; |
| 639 | |
| 640 | for (i = 0; i < dev_info->info->var.yres; i++) { |
| 641 | |
| 642 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 643 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 644 | bufptr = dev_info->buf; |
| 645 | } |
| 646 | |
| 647 | rem = dev_info->info->var.xres; |
| 648 | |
| 649 | while (rem) { |
| 650 | |
| 651 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 652 | ret = |
| 653 | dlfb_bulk_msg(dev_info, |
| 654 | bufptr - dev_info->buf); |
| 655 | bufptr = dev_info->buf; |
| 656 | |
| 657 | } |
| 658 | |
| 659 | *bufptr++ = 0xAF; |
| 660 | *bufptr++ = 0x6A; |
| 661 | |
| 662 | *bufptr++ = (char)(base >> 16); |
| 663 | *bufptr++ = (char)(base >> 8); |
| 664 | *bufptr++ = (char)(base); |
| 665 | |
| 666 | if (rem > 255) { |
| 667 | *bufptr++ = 255; |
| 668 | *bufptr++ = (char)(source >> 16); |
| 669 | *bufptr++ = (char)(source >> 8); |
| 670 | *bufptr++ = (char)(source); |
| 671 | |
| 672 | rem -= 255; |
| 673 | base += 255 * 2; |
| 674 | source += 255 * 2; |
| 675 | |
| 676 | } else { |
| 677 | *bufptr++ = rem; |
| 678 | *bufptr++ = (char)(source >> 16); |
| 679 | *bufptr++ = (char)(source >> 8); |
| 680 | *bufptr++ = (char)(source); |
| 681 | |
| 682 | base += rem * 2; |
| 683 | source += rem * 2; |
| 684 | rem = 0; |
| 685 | } |
| 686 | } |
| 687 | } |
| 688 | |
| 689 | if (bufptr > dev_info->buf) |
| 690 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 691 | |
| 692 | mutex_unlock(&dev_info->bulk_mutex); |
| 693 | |
| 694 | return 1; |
| 695 | |
| 696 | } |
| 697 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 698 | static int |
| 699 | copyarea(struct dlfb_data *dev_info, int dx, int dy, int sx, int sy, |
| 700 | int width, int height) |
| 701 | { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 702 | int base; |
| 703 | int source; |
| 704 | int rem; |
| 705 | int i, ret; |
| 706 | |
| 707 | char *bufptr; |
| 708 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 709 | if (dx + width > dev_info->info->var.xres) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 710 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 711 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 712 | if (dy + height > dev_info->info->var.yres) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 713 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 714 | |
| 715 | mutex_lock(&dev_info->bulk_mutex); |
| 716 | |
| 717 | base = |
| 718 | dev_info->base16 + (dev_info->info->var.xres * 2 * dy) + (dx * 2); |
| 719 | source = (dev_info->info->var.xres * 2 * sy) + (sx * 2); |
| 720 | |
| 721 | bufptr = dev_info->buf; |
| 722 | |
| 723 | for (i = sy; i < sy + height; i++) { |
| 724 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 725 | memcpy(dev_info->backing_buffer + base - dev_info->base16, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 726 | dev_info->backing_buffer + source, width * 2); |
| 727 | |
| 728 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 729 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 730 | bufptr = dev_info->buf; |
| 731 | } |
| 732 | |
| 733 | rem = width; |
| 734 | |
| 735 | while (rem) { |
| 736 | |
| 737 | if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) { |
| 738 | ret = |
| 739 | dlfb_bulk_msg(dev_info, |
| 740 | bufptr - dev_info->buf); |
| 741 | bufptr = dev_info->buf; |
| 742 | } |
| 743 | |
| 744 | *bufptr++ = 0xAF; |
| 745 | *bufptr++ = 0x6A; |
| 746 | |
| 747 | *bufptr++ = (char)(base >> 16); |
| 748 | *bufptr++ = (char)(base >> 8); |
| 749 | *bufptr++ = (char)(base); |
| 750 | |
| 751 | if (rem > 255) { |
| 752 | *bufptr++ = 255; |
| 753 | *bufptr++ = (char)(source >> 16); |
| 754 | *bufptr++ = (char)(source >> 8); |
| 755 | *bufptr++ = (char)(source); |
| 756 | |
| 757 | rem -= 255; |
| 758 | base += 255 * 2; |
| 759 | source += 255 * 2; |
| 760 | |
| 761 | } else { |
| 762 | *bufptr++ = rem; |
| 763 | *bufptr++ = (char)(source >> 16); |
| 764 | *bufptr++ = (char)(source >> 8); |
| 765 | *bufptr++ = (char)(source); |
| 766 | |
| 767 | base += rem * 2; |
| 768 | source += rem * 2; |
| 769 | rem = 0; |
| 770 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 771 | } |
| 772 | |
| 773 | base += (dev_info->info->var.xres * 2) - (width * 2); |
| 774 | source += (dev_info->info->var.xres * 2) - (width * 2); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 775 | } |
| 776 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 777 | if (bufptr > dev_info->buf) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 778 | ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 779 | |
| 780 | mutex_unlock(&dev_info->bulk_mutex); |
| 781 | |
| 782 | return 1; |
| 783 | } |
| 784 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 785 | static void dlfb_ops_copyarea(struct fb_info *info, |
| 786 | const struct fb_copyarea *area) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 787 | { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 788 | struct dlfb_data *dev = info->par; |
| 789 | |
| 790 | copyarea(dev, area->dx, area->dy, area->sx, area->sy, area->width, |
| 791 | area->height); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 792 | } |
| 793 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 794 | static void dlfb_ops_imageblit(struct fb_info *info, |
| 795 | const struct fb_image *image) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 796 | { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 797 | int ret; |
| 798 | struct dlfb_data *dev = info->par; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 799 | cfb_imageblit(info, image); |
| 800 | ret = |
| 801 | image_blit(dev, image->dx, image->dy, image->width, image->height, |
| 802 | info->screen_base); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 803 | } |
| 804 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 805 | static void dlfb_ops_fillrect(struct fb_info *info, |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 806 | const struct fb_fillrect *region) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 807 | { |
| 808 | |
| 809 | unsigned char red, green, blue; |
| 810 | struct dlfb_data *dev = info->par; |
| 811 | |
| 812 | memcpy(&red, ®ion->color, 1); |
| 813 | memcpy(&green, ®ion->color + 1, 1); |
| 814 | memcpy(&blue, ®ion->color + 2, 1); |
| 815 | draw_rect(dev, region->dx, region->dy, region->width, region->height, |
| 816 | red, green, blue); |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 817 | /* printk("FILL RECT %d %d !!!\n", region->dx, region->dy); */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 818 | |
| 819 | } |
| 820 | |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame^] | 821 | static void dlfb_get_edid(struct dlfb_data *dev) |
| 822 | { |
| 823 | int i; |
| 824 | int ret; |
| 825 | char rbuf[2]; |
| 826 | |
| 827 | for (i = 0; i < sizeof(dev->edid); i++) { |
| 828 | ret = usb_control_msg(dev->udev, |
| 829 | usb_rcvctrlpipe(dev->udev, 0), (0x02), |
| 830 | (0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2, |
| 831 | 0); |
| 832 | dev->edid[i] = rbuf[1]; |
| 833 | } |
| 834 | } |
| 835 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 836 | static int dlfb_ops_ioctl(struct fb_info *info, unsigned int cmd, |
| 837 | unsigned long arg) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 838 | { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 839 | struct dlfb_data *dev_info = info->par; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 840 | struct dloarea *area = NULL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 841 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 842 | if (cmd == 0xAD) { |
| 843 | char *edid = (char *)arg; |
| 844 | dlfb_edid(dev_info); |
| 845 | if (copy_to_user(edid, dev_info->edid, 128)) { |
| 846 | return -EFAULT; |
| 847 | } |
| 848 | return 0; |
| 849 | } |
| 850 | |
| 851 | if (cmd == 0xAA || cmd == 0xAB || cmd == 0xAC) { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 852 | |
| 853 | area = (struct dloarea *)arg; |
| 854 | |
| 855 | if (area->x < 0) |
| 856 | area->x = 0; |
| 857 | |
| 858 | if (area->x > info->var.xres) |
| 859 | area->x = info->var.xres; |
| 860 | |
| 861 | if (area->y < 0) |
| 862 | area->y = 0; |
| 863 | |
| 864 | if (area->y > info->var.yres) |
| 865 | area->y = info->var.yres; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 866 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 867 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 868 | if (cmd == 0xAA) { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 869 | image_blit(dev_info, area->x, area->y, area->w, area->h, |
| 870 | info->screen_base); |
| 871 | } |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 872 | if (cmd == 0xAC) { |
| 873 | copyfb(dev_info); |
| 874 | image_blit(dev_info, area->x, area->y, area->w, area->h, |
| 875 | info->screen_base); |
| 876 | swapfb(dev_info); |
| 877 | } else if (cmd == 0xAB) { |
| 878 | |
| 879 | if (area->x2 < 0) |
| 880 | area->x2 = 0; |
| 881 | |
| 882 | if (area->y2 < 0) |
| 883 | area->y2 = 0; |
| 884 | |
| 885 | copyarea(dev_info, |
| 886 | area->x2, area->y2, area->x, area->y, area->w, |
| 887 | area->h); |
| 888 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 889 | return 0; |
| 890 | } |
| 891 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 892 | /* taken from vesafb */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 893 | static int |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 894 | dlfb_ops_setcolreg(unsigned regno, unsigned red, unsigned green, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 895 | unsigned blue, unsigned transp, struct fb_info *info) |
| 896 | { |
| 897 | int err = 0; |
| 898 | |
| 899 | if (regno >= info->cmap.len) |
| 900 | return 1; |
| 901 | |
| 902 | if (regno < 16) { |
| 903 | if (info->var.red.offset == 10) { |
| 904 | /* 1:5:5:5 */ |
| 905 | ((u32 *) (info->pseudo_palette))[regno] = |
| 906 | ((red & 0xf800) >> 1) | |
| 907 | ((green & 0xf800) >> 6) | ((blue & 0xf800) >> 11); |
| 908 | } else { |
| 909 | /* 0:5:6:5 */ |
| 910 | ((u32 *) (info->pseudo_palette))[regno] = |
| 911 | ((red & 0xf800)) | |
| 912 | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11); |
| 913 | } |
| 914 | } |
| 915 | |
| 916 | return err; |
| 917 | } |
| 918 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 919 | static int dlfb_ops_release(struct fb_info *info, int user) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 920 | { |
| 921 | struct dlfb_data *dev_info = info->par; |
| 922 | image_blit(dev_info, 0, 0, info->var.xres, info->var.yres, |
| 923 | info->screen_base); |
| 924 | return 0; |
| 925 | } |
| 926 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 927 | /* |
| 928 | * Called when all client interfaces to start transactions have been disabled, |
| 929 | * and all references to our device instance (dlfb_data) are released. |
| 930 | * Every transaction must have a reference, so we know are fully spun down |
| 931 | */ |
| 932 | static void dlfb_delete(struct kref *kref) |
| 933 | { |
| 934 | struct dlfb_data *dev = container_of(kref, struct dlfb_data, kref); |
| 935 | |
| 936 | if (dev->backing_buffer) |
| 937 | vfree(dev->backing_buffer); |
| 938 | |
| 939 | kfree(dev); |
| 940 | } |
| 941 | |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame^] | 942 | /* |
| 943 | * Check whether a video mode is supported by the DisplayLink chip |
| 944 | * We start from monitor's modes, so don't need to filter that here |
| 945 | */ |
| 946 | static int dlfb_is_valid_mode(struct fb_videomode *mode, |
| 947 | struct fb_info *info) |
| 948 | { |
| 949 | struct dlfb_data *dev = info->par; |
| 950 | |
| 951 | if (mode->xres * mode->yres > dev->sku_pixel_limit) |
| 952 | return 0; |
| 953 | |
| 954 | return 1; |
| 955 | } |
| 956 | |
| 957 | static void dlfb_var_color_format(struct fb_var_screeninfo *var) |
| 958 | { |
| 959 | const struct fb_bitfield red = { 11, 5, 0 }; |
| 960 | const struct fb_bitfield green = { 5, 6, 0 }; |
| 961 | const struct fb_bitfield blue = { 0, 5, 0 }; |
| 962 | |
| 963 | var->bits_per_pixel = 16; |
| 964 | var->red = red; |
| 965 | var->green = green; |
| 966 | var->blue = blue; |
| 967 | } |
| 968 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 969 | static int dlfb_ops_blank(int blank_mode, struct fb_info *info) |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 970 | { |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 971 | struct dlfb_data *dev_info = info->par; |
| 972 | char *bufptr = dev_info->buf; |
| 973 | |
| 974 | bufptr = dlfb_set_register(bufptr, 0xFF, 0x00); |
| 975 | if (blank_mode != FB_BLANK_UNBLANK) { |
| 976 | bufptr = dlfb_set_register(bufptr, 0x1F, 0x01); |
| 977 | } else { |
| 978 | bufptr = dlfb_set_register(bufptr, 0x1F, 0x00); |
| 979 | } |
| 980 | bufptr = dlfb_set_register(bufptr, 0xFF, 0xFF); |
| 981 | |
| 982 | dlfb_bulk_msg(dev_info, bufptr - dev_info->buf); |
| 983 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 984 | return 0; |
| 985 | } |
| 986 | |
| 987 | static struct fb_ops dlfb_ops = { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 988 | .fb_setcolreg = dlfb_ops_setcolreg, |
| 989 | .fb_fillrect = dlfb_ops_fillrect, |
| 990 | .fb_copyarea = dlfb_ops_copyarea, |
| 991 | .fb_imageblit = dlfb_ops_imageblit, |
| 992 | .fb_mmap = dlfb_ops_mmap, |
| 993 | .fb_ioctl = dlfb_ops_ioctl, |
| 994 | .fb_release = dlfb_ops_release, |
| 995 | .fb_blank = dlfb_ops_blank, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 996 | }; |
| 997 | |
Bernie Thompson | cc403dc | 2010-02-15 06:45:49 -0800 | [diff] [blame] | 998 | /* |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame^] | 999 | * Calls dlfb_get_edid() to query the EDID of attached monitor via usb cmds |
| 1000 | * Then parses EDID into three places used by various parts of fbdev: |
| 1001 | * fb_var_screeninfo contains the timing of the monitor's preferred mode |
| 1002 | * fb_info.monspecs is full parsed EDID info, including monspecs.modedb |
| 1003 | * fb_info.modelist is a linked list of all monitor & VESA modes which work |
| 1004 | * |
| 1005 | * If EDID is not readable/valid, then modelist is all VESA modes, |
| 1006 | * monspecs is NULL, and fb_var_screeninfo is set to safe VESA mode |
| 1007 | * Returns 0 if EDID parses successfully |
| 1008 | */ |
| 1009 | static int dlfb_parse_edid(struct dlfb_data *dev, |
| 1010 | struct fb_var_screeninfo *var, |
| 1011 | struct fb_info *info) |
| 1012 | { |
| 1013 | int i; |
| 1014 | const struct fb_videomode *default_vmode = NULL; |
| 1015 | int result = 0; |
| 1016 | |
| 1017 | fb_destroy_modelist(&info->modelist); |
| 1018 | memset(&info->monspecs, 0, sizeof(info->monspecs)); |
| 1019 | |
| 1020 | dlfb_get_edid(dev); |
| 1021 | fb_edid_to_monspecs(dev->edid, &info->monspecs); |
| 1022 | |
| 1023 | if (info->monspecs.modedb_len > 0) { |
| 1024 | |
| 1025 | for (i = 0; i < info->monspecs.modedb_len; i++) { |
| 1026 | if (dlfb_is_valid_mode(&info->monspecs.modedb[i], info)) |
| 1027 | fb_add_videomode(&info->monspecs.modedb[i], |
| 1028 | &info->modelist); |
| 1029 | } |
| 1030 | |
| 1031 | default_vmode = fb_find_best_display(&info->monspecs, |
| 1032 | &info->modelist); |
| 1033 | } else { |
| 1034 | struct fb_videomode fb_vmode = {0}; |
| 1035 | |
| 1036 | dl_err("Unable to get valid EDID from device/display\n"); |
| 1037 | result = 1; |
| 1038 | |
| 1039 | /* |
| 1040 | * Add the standard VESA modes to our modelist |
| 1041 | * Since we don't have EDID, there may be modes that |
| 1042 | * overspec monitor and/or are incorrect aspect ratio, etc. |
| 1043 | * But at least the user has a chance to choose |
| 1044 | */ |
| 1045 | for (i = 0; i < VESA_MODEDB_SIZE; i++) { |
| 1046 | if (dlfb_is_valid_mode((struct fb_videomode *) |
| 1047 | &vesa_modes[i], info)) |
| 1048 | fb_add_videomode(&vesa_modes[i], |
| 1049 | &info->modelist); |
| 1050 | } |
| 1051 | |
| 1052 | /* |
| 1053 | * default to resolution safe for projectors |
| 1054 | * (since they are most common case without EDID) |
| 1055 | */ |
| 1056 | fb_vmode.xres = 800; |
| 1057 | fb_vmode.yres = 600; |
| 1058 | fb_vmode.refresh = 60; |
| 1059 | default_vmode = fb_find_nearest_mode(&fb_vmode, |
| 1060 | &info->modelist); |
| 1061 | } |
| 1062 | |
| 1063 | fb_videomode_to_var(var, default_vmode); |
| 1064 | dlfb_var_color_format(var); |
| 1065 | |
| 1066 | return result; |
| 1067 | } |
| 1068 | |
| 1069 | static ssize_t metrics_bytes_rendered_show(struct device *fbdev, |
| 1070 | struct device_attribute *a, char *buf) { |
| 1071 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1072 | struct dlfb_data *dev = fb_info->par; |
| 1073 | return snprintf(buf, PAGE_SIZE, "%u\n", |
| 1074 | atomic_read(&dev->bytes_rendered)); |
| 1075 | } |
| 1076 | |
| 1077 | static ssize_t metrics_bytes_identical_show(struct device *fbdev, |
| 1078 | struct device_attribute *a, char *buf) { |
| 1079 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1080 | struct dlfb_data *dev = fb_info->par; |
| 1081 | return snprintf(buf, PAGE_SIZE, "%u\n", |
| 1082 | atomic_read(&dev->bytes_identical)); |
| 1083 | } |
| 1084 | |
| 1085 | static ssize_t metrics_bytes_sent_show(struct device *fbdev, |
| 1086 | struct device_attribute *a, char *buf) { |
| 1087 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1088 | struct dlfb_data *dev = fb_info->par; |
| 1089 | return snprintf(buf, PAGE_SIZE, "%u\n", |
| 1090 | atomic_read(&dev->bytes_sent)); |
| 1091 | } |
| 1092 | |
| 1093 | static ssize_t metrics_cpu_kcycles_used_show(struct device *fbdev, |
| 1094 | struct device_attribute *a, char *buf) { |
| 1095 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1096 | struct dlfb_data *dev = fb_info->par; |
| 1097 | return snprintf(buf, PAGE_SIZE, "%u\n", |
| 1098 | atomic_read(&dev->cpu_kcycles_used)); |
| 1099 | } |
| 1100 | |
| 1101 | static ssize_t metrics_misc_show(struct device *fbdev, |
| 1102 | struct device_attribute *a, char *buf) { |
| 1103 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1104 | struct dlfb_data *dev = fb_info->par; |
| 1105 | return snprintf(buf, PAGE_SIZE, |
| 1106 | "Calls to\ndamage: %u\nblit: %u\n" |
| 1107 | "defio faults: %u\ncopy: %u\n" |
| 1108 | "fill: %u\n\n" |
| 1109 | "active framebuffer clients: %d\n" |
| 1110 | "urbs available %d(%d)\n" |
| 1111 | "Shadow framebuffer in use? %s\n" |
| 1112 | "Any lost pixels? %s\n", |
| 1113 | atomic_read(&dev->damage_count), |
| 1114 | atomic_read(&dev->blit_count), |
| 1115 | atomic_read(&dev->defio_fault_count), |
| 1116 | atomic_read(&dev->copy_count), |
| 1117 | atomic_read(&dev->fill_count), |
| 1118 | dev->fb_count, |
| 1119 | dev->urbs.available, dev->urbs.limit_sem.count, |
| 1120 | (dev->backing_buffer) ? "yes" : "no", |
| 1121 | atomic_read(&dev->lost_pixels) ? "yes" : "no"); |
| 1122 | } |
| 1123 | |
| 1124 | static ssize_t edid_show(struct kobject *kobj, struct bin_attribute *a, |
| 1125 | char *buf, loff_t off, size_t count) { |
| 1126 | struct device *fbdev = container_of(kobj, struct device, kobj); |
| 1127 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1128 | struct dlfb_data *dev = fb_info->par; |
| 1129 | char *edid = &dev->edid[0]; |
| 1130 | const size_t size = sizeof(dev->edid); |
| 1131 | |
| 1132 | if (dlfb_parse_edid(dev, &fb_info->var, fb_info)) |
| 1133 | return 0; |
| 1134 | |
| 1135 | if (off >= size) |
| 1136 | return 0; |
| 1137 | |
| 1138 | if (off + count > size) |
| 1139 | count = size - off; |
| 1140 | memcpy(buf, edid + off, count); |
| 1141 | |
| 1142 | return count; |
| 1143 | } |
| 1144 | |
| 1145 | |
| 1146 | static ssize_t metrics_reset_store(struct device *fbdev, |
| 1147 | struct device_attribute *attr, |
| 1148 | const char *buf, size_t count) |
| 1149 | { |
| 1150 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1151 | struct dlfb_data *dev = fb_info->par; |
| 1152 | |
| 1153 | atomic_set(&dev->bytes_rendered, 0); |
| 1154 | atomic_set(&dev->bytes_identical, 0); |
| 1155 | atomic_set(&dev->bytes_sent, 0); |
| 1156 | atomic_set(&dev->cpu_kcycles_used, 0); |
| 1157 | atomic_set(&dev->blit_count, 0); |
| 1158 | atomic_set(&dev->copy_count, 0); |
| 1159 | atomic_set(&dev->fill_count, 0); |
| 1160 | atomic_set(&dev->defio_fault_count, 0); |
| 1161 | atomic_set(&dev->damage_count, 0); |
| 1162 | |
| 1163 | return count; |
| 1164 | } |
| 1165 | |
| 1166 | static ssize_t use_defio_show(struct device *fbdev, |
| 1167 | struct device_attribute *a, char *buf) { |
| 1168 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1169 | struct dlfb_data *dev = fb_info->par; |
| 1170 | return snprintf(buf, PAGE_SIZE, "%d\n", |
| 1171 | atomic_read(&dev->use_defio)); |
| 1172 | } |
| 1173 | |
| 1174 | static ssize_t use_defio_store(struct device *fbdev, |
| 1175 | struct device_attribute *attr, |
| 1176 | const char *buf, size_t count) |
| 1177 | { |
| 1178 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1179 | struct dlfb_data *dev = fb_info->par; |
| 1180 | |
| 1181 | if (count > 0) { |
| 1182 | if (buf[0] == '0') |
| 1183 | atomic_set(&dev->use_defio, 0); |
| 1184 | if (buf[0] == '1') |
| 1185 | atomic_set(&dev->use_defio, 1); |
| 1186 | } |
| 1187 | return count; |
| 1188 | } |
| 1189 | |
| 1190 | static struct bin_attribute edid_attr = { |
| 1191 | .attr.name = "edid", |
| 1192 | .attr.mode = 0444, |
| 1193 | .size = 128, |
| 1194 | .read = edid_show, |
| 1195 | }; |
| 1196 | |
| 1197 | static struct device_attribute fb_device_attrs[] = { |
| 1198 | __ATTR_RO(metrics_bytes_rendered), |
| 1199 | __ATTR_RO(metrics_bytes_identical), |
| 1200 | __ATTR_RO(metrics_bytes_sent), |
| 1201 | __ATTR_RO(metrics_cpu_kcycles_used), |
| 1202 | __ATTR_RO(metrics_misc), |
| 1203 | __ATTR(metrics_reset, S_IWUGO, NULL, metrics_reset_store), |
| 1204 | __ATTR_RW(use_defio), |
| 1205 | }; |
| 1206 | |
| 1207 | /* |
Bernie Thompson | cc403dc | 2010-02-15 06:45:49 -0800 | [diff] [blame] | 1208 | * This is necessary before we can communicate with the display controller. |
| 1209 | */ |
| 1210 | static int dlfb_select_std_channel(struct dlfb_data *dev) |
| 1211 | { |
| 1212 | int ret; |
| 1213 | u8 set_def_chn[] = { 0x57, 0xCD, 0xDC, 0xA7, |
| 1214 | 0x1C, 0x88, 0x5E, 0x15, |
| 1215 | 0x60, 0xFE, 0xC6, 0x97, |
| 1216 | 0x16, 0x3D, 0x47, 0xF2 }; |
| 1217 | |
| 1218 | ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), |
| 1219 | NR_USB_REQUEST_CHANNEL, |
| 1220 | (USB_DIR_OUT | USB_TYPE_VENDOR), 0, 0, |
| 1221 | set_def_chn, sizeof(set_def_chn), USB_CTRL_SET_TIMEOUT); |
| 1222 | return ret; |
| 1223 | } |
| 1224 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1225 | static int dlfb_probe(struct usb_interface *interface, |
| 1226 | const struct usb_device_id *id) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1227 | { |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1228 | struct device *mydev; |
| 1229 | struct usb_device *usbdev; |
| 1230 | struct dlfb_data *dev; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1231 | struct fb_info *info; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1232 | int videomemorysize; |
| 1233 | unsigned char *videomemory; |
| 1234 | int retval = -ENOMEM; |
| 1235 | struct fb_var_screeninfo *var; |
| 1236 | struct fb_bitfield red = { 11, 5, 0 }; |
| 1237 | struct fb_bitfield green = { 5, 6, 0 }; |
| 1238 | struct fb_bitfield blue = { 0, 5, 0 }; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1239 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1240 | usbdev = usb_get_dev(interface_to_usbdev(interface)); |
| 1241 | mydev = &usbdev->dev; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1242 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1243 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 1244 | if (dev == NULL) { |
| 1245 | dev_err(mydev, "failed alloc of dev struct\n"); |
| 1246 | goto err_devalloc; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1247 | } |
| 1248 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1249 | mutex_init(&dev->bulk_mutex); |
| 1250 | dev->udev = usbdev; |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1251 | dev->gdev = &usbdev->dev; /* our generic struct device * */ |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1252 | dev->interface = interface; |
| 1253 | usb_set_intfdata(interface, dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1254 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1255 | dev_info(mydev, "dlfb_probe: setting up DisplayLink device\n"); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1256 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1257 | /* |
| 1258 | * TODO: replace single 64K buffer with buffer list |
| 1259 | * and async dispatch |
| 1260 | */ |
| 1261 | dev->buf = kmalloc(BUF_SIZE, GFP_KERNEL); |
| 1262 | if (dev->buf == NULL) { |
| 1263 | dev_err(mydev, "unable to allocate memory for dlfb commands\n"); |
| 1264 | goto err_usballoc; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1265 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1266 | dev->bufend = dev->buf + BUF_SIZE; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1267 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1268 | dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1269 | usb_fill_bulk_urb(dev->tx_urb, dev->udev, |
| 1270 | usb_sndbulkpipe(dev->udev, 1), dev->buf, 0, |
| 1271 | dlfb_bulk_callback, dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1272 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1273 | /* allocates framebuffer driver structure, not framebuffer memory */ |
| 1274 | info = framebuffer_alloc(0, mydev); |
| 1275 | if (!info) |
| 1276 | goto err_fballoc; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1277 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1278 | dev->info = info; |
| 1279 | info->par = dev; |
| 1280 | info->pseudo_palette = dev->pseudo_palette; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1281 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1282 | var = &info->var; |
| 1283 | retval = dlfb_get_var_from_edid(dev, var); |
| 1284 | if (retval) { |
| 1285 | /* had a problem getting edid. so fallback to 640x480 */ |
| 1286 | dev_err(mydev, "Problem %d with EDID.\n", retval); |
| 1287 | var->xres = 640; |
| 1288 | var->yres = 480; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1289 | } |
| 1290 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1291 | /* |
| 1292 | * ok, now that we've got the size info, we can alloc our framebuffer. |
| 1293 | * We are using 16bpp. |
| 1294 | */ |
| 1295 | info->var.bits_per_pixel = 16; |
| 1296 | info->fix = dlfb_fix; |
| 1297 | info->fix.line_length = var->xres * (var->bits_per_pixel / 8); |
| 1298 | videomemorysize = info->fix.line_length * var->yres; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1299 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1300 | /* |
| 1301 | * The big chunk of system memory we use as a virtual framebuffer. |
| 1302 | * Pages don't need to be set RESERVED (non-swap) immediately on 2.6 |
| 1303 | * remap_pfn_page() syscall in our mmap and/or defio will handle. |
| 1304 | */ |
| 1305 | videomemory = vmalloc(videomemorysize); |
| 1306 | if (!videomemory) |
| 1307 | goto err_vidmem; |
| 1308 | memset(videomemory, 0, videomemorysize); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1309 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1310 | info->screen_base = videomemory; |
| 1311 | info->fix.smem_len = PAGE_ALIGN(videomemorysize); |
| 1312 | info->fix.smem_start = (unsigned long) videomemory; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1313 | info->flags = |
| 1314 | FBINFO_DEFAULT | FBINFO_READS_FAST | FBINFO_HWACCEL_IMAGEBLIT | |
| 1315 | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1316 | |
| 1317 | /* |
| 1318 | * Second framebuffer copy, mirroring the state of the framebuffer |
| 1319 | * on the physical USB device. We can function without this. |
| 1320 | * But with imperfect damage info we may end up sending pixels over USB |
| 1321 | * that were, in fact, unchanged -- wasting limited USB bandwidth |
| 1322 | */ |
| 1323 | dev->backing_buffer = vmalloc(dev->screen_size); |
| 1324 | if (!dev->backing_buffer) |
| 1325 | dev_info(mydev, "No backing buffer allocated!\n"); |
| 1326 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1327 | info->fbops = &dlfb_ops; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1328 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1329 | var->vmode = FB_VMODE_NONINTERLACED; |
| 1330 | var->red = red; |
| 1331 | var->green = green; |
| 1332 | var->blue = blue; |
| 1333 | |
| 1334 | /* |
| 1335 | * TODO: Enable FB_CONFIG_DEFIO support |
| 1336 | |
| 1337 | info->fbdefio = &dlfb_defio; |
| 1338 | fb_deferred_io_init(info); |
| 1339 | |
| 1340 | */ |
| 1341 | |
| 1342 | retval = fb_alloc_cmap(&info->cmap, 256, 0); |
| 1343 | if (retval < 0) { |
| 1344 | dev_err(mydev, "Failed to allocate colormap\n"); |
| 1345 | goto err_cmap; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1346 | } |
| 1347 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1348 | dlfb_select_std_channel(dev); |
| 1349 | dlfb_set_video_mode(dev, var); |
| 1350 | /* TODO: dlfb_dpy_update(dev); */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1351 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1352 | retval = register_framebuffer(info); |
| 1353 | if (retval < 0) |
| 1354 | goto err_regfb; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1355 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1356 | /* paint "successful" green screen */ |
| 1357 | draw_rect(dev, 0, 0, dev->info->var.xres, |
| 1358 | dev->info->var.yres, 0x30, 0xff, 0x30); |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 1359 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1360 | dev_info(mydev, "DisplayLink USB device %d now attached, " |
| 1361 | "using %dK of memory\n", info->node, |
| 1362 | ((dev->backing_buffer) ? |
| 1363 | videomemorysize * 2 : videomemorysize) >> 10); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1364 | return 0; |
| 1365 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1366 | err_regfb: |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1367 | fb_dealloc_cmap(&info->cmap); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1368 | err_cmap: |
| 1369 | /* TODO: fb_deferred_io_cleanup(info); */ |
| 1370 | vfree(videomemory); |
| 1371 | err_vidmem: |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1372 | framebuffer_release(info); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1373 | err_fballoc: |
| 1374 | kfree(dev->buf); |
| 1375 | err_usballoc: |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1376 | usb_set_intfdata(interface, NULL); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1377 | usb_put_dev(dev->udev); |
| 1378 | kfree(dev); |
| 1379 | err_devalloc: |
| 1380 | return retval; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1381 | } |
| 1382 | |
| 1383 | static void dlfb_disconnect(struct usb_interface *interface) |
| 1384 | { |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1385 | struct dlfb_data *dev; |
| 1386 | struct fb_info *info; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1387 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1388 | dev = usb_get_intfdata(interface); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1389 | usb_set_intfdata(interface, NULL); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1390 | usb_put_dev(dev->udev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1391 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1392 | /* |
| 1393 | * TODO: since, upon usb disconnect(), usb will cancel in-flight urbs |
| 1394 | * and error out any new ones, look at eliminating need for mutex |
| 1395 | */ |
| 1396 | mutex_lock(&dev->bulk_mutex); |
| 1397 | dev->interface = NULL; |
| 1398 | info = dev->info; |
| 1399 | mutex_unlock(&dev->bulk_mutex); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1400 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1401 | if (info) { |
| 1402 | dev_info(&interface->dev, "Detaching DisplayLink device %d.\n", |
| 1403 | info->node); |
| 1404 | unregister_framebuffer(info); |
| 1405 | fb_dealloc_cmap(&info->cmap); |
| 1406 | /* TODO: fb_deferred_io_cleanup(info); */ |
| 1407 | fb_dealloc_cmap(&info->cmap); |
| 1408 | vfree((void __force *)info->screen_base); |
| 1409 | framebuffer_release(info); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1410 | } |
| 1411 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1412 | if (dev->backing_buffer) |
| 1413 | vfree(dev->backing_buffer); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1414 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1415 | kfree(dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1416 | } |
| 1417 | |
| 1418 | static struct usb_driver dlfb_driver = { |
| 1419 | .name = "udlfb", |
| 1420 | .probe = dlfb_probe, |
| 1421 | .disconnect = dlfb_disconnect, |
| 1422 | .id_table = id_table, |
| 1423 | }; |
| 1424 | |
| 1425 | static int __init dlfb_init(void) |
| 1426 | { |
| 1427 | int res; |
| 1428 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1429 | res = usb_register(&dlfb_driver); |
| 1430 | if (res) |
| 1431 | err("usb_register failed. Error number %d", res); |
| 1432 | |
| 1433 | printk("VMODES initialized\n"); |
| 1434 | |
| 1435 | return res; |
| 1436 | } |
| 1437 | |
| 1438 | static void __exit dlfb_exit(void) |
| 1439 | { |
| 1440 | usb_deregister(&dlfb_driver); |
| 1441 | } |
| 1442 | |
| 1443 | module_init(dlfb_init); |
| 1444 | module_exit(dlfb_exit); |
| 1445 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1446 | static void dlfb_urb_completion(struct urb *urb) |
| 1447 | { |
| 1448 | struct urb_node *unode = urb->context; |
| 1449 | struct dlfb_data *dev = unode->dev; |
| 1450 | unsigned long flags; |
| 1451 | |
| 1452 | /* sync/async unlink faults aren't errors */ |
| 1453 | if (urb->status) { |
| 1454 | if (!(urb->status == -ENOENT || |
| 1455 | urb->status == -ECONNRESET || |
| 1456 | urb->status == -ESHUTDOWN)) { |
| 1457 | dl_err("%s - nonzero write bulk status received: %d\n", |
| 1458 | __func__, urb->status); |
| 1459 | atomic_set(&dev->lost_pixels, 1); |
| 1460 | } |
| 1461 | } |
| 1462 | |
| 1463 | urb->transfer_buffer_length = dev->urbs.size; /* reset to actual */ |
| 1464 | |
| 1465 | spin_lock_irqsave(&dev->urbs.lock, flags); |
| 1466 | list_add_tail(&unode->entry, &dev->urbs.list); |
| 1467 | dev->urbs.available++; |
| 1468 | spin_unlock_irqrestore(&dev->urbs.lock, flags); |
| 1469 | |
| 1470 | up(&dev->urbs.limit_sem); |
| 1471 | } |
| 1472 | |
| 1473 | static void dlfb_free_urb_list(struct dlfb_data *dev) |
| 1474 | { |
| 1475 | int count = dev->urbs.count; |
| 1476 | struct list_head *node; |
| 1477 | struct urb_node *unode; |
| 1478 | struct urb *urb; |
| 1479 | int ret; |
| 1480 | unsigned long flags; |
| 1481 | |
| 1482 | dl_notice("Waiting for completes and freeing all render urbs\n"); |
| 1483 | |
| 1484 | /* keep waiting and freeing, until we've got 'em all */ |
| 1485 | while (count--) { |
| 1486 | /* Timeout means a memory leak and/or fault */ |
| 1487 | ret = down_timeout(&dev->urbs.limit_sem, FREE_URB_TIMEOUT); |
| 1488 | if (ret) { |
| 1489 | BUG_ON(ret); |
| 1490 | break; |
| 1491 | } |
| 1492 | spin_lock_irqsave(&dev->urbs.lock, flags); |
| 1493 | |
| 1494 | node = dev->urbs.list.next; /* have reserved one with sem */ |
| 1495 | list_del_init(node); |
| 1496 | |
| 1497 | spin_unlock_irqrestore(&dev->urbs.lock, flags); |
| 1498 | |
| 1499 | unode = list_entry(node, struct urb_node, entry); |
| 1500 | urb = unode->urb; |
| 1501 | |
| 1502 | /* Free each separately allocated piece */ |
| 1503 | usb_buffer_free(urb->dev, dev->urbs.size, |
| 1504 | urb->transfer_buffer, urb->transfer_dma); |
| 1505 | usb_free_urb(urb); |
| 1506 | kfree(node); |
| 1507 | } |
| 1508 | |
| 1509 | kref_put(&dev->kref, dlfb_delete); |
| 1510 | |
| 1511 | } |
| 1512 | |
| 1513 | static int dlfb_alloc_urb_list(struct dlfb_data *dev, int count, size_t size) |
| 1514 | { |
| 1515 | int i = 0; |
| 1516 | struct urb *urb; |
| 1517 | struct urb_node *unode; |
| 1518 | char *buf; |
| 1519 | |
| 1520 | spin_lock_init(&dev->urbs.lock); |
| 1521 | |
| 1522 | dev->urbs.size = size; |
| 1523 | INIT_LIST_HEAD(&dev->urbs.list); |
| 1524 | |
| 1525 | while (i < count) { |
| 1526 | unode = kzalloc(sizeof(struct urb_node), GFP_KERNEL); |
| 1527 | if (!unode) |
| 1528 | break; |
| 1529 | unode->dev = dev; |
| 1530 | |
| 1531 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1532 | if (!urb) { |
| 1533 | kfree(unode); |
| 1534 | break; |
| 1535 | } |
| 1536 | unode->urb = urb; |
| 1537 | |
| 1538 | buf = usb_buffer_alloc(dev->udev, MAX_TRANSFER, GFP_KERNEL, |
| 1539 | &urb->transfer_dma); |
| 1540 | if (!buf) { |
| 1541 | kfree(unode); |
| 1542 | usb_free_urb(urb); |
| 1543 | break; |
| 1544 | } |
| 1545 | |
| 1546 | /* urb->transfer_buffer_length set to actual before submit */ |
| 1547 | usb_fill_bulk_urb(urb, dev->udev, usb_sndbulkpipe(dev->udev, 1), |
| 1548 | buf, size, dlfb_urb_completion, unode); |
| 1549 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 1550 | |
| 1551 | list_add_tail(&unode->entry, &dev->urbs.list); |
| 1552 | |
| 1553 | i++; |
| 1554 | } |
| 1555 | |
| 1556 | sema_init(&dev->urbs.limit_sem, i); |
| 1557 | dev->urbs.count = i; |
| 1558 | dev->urbs.available = i; |
| 1559 | |
| 1560 | kref_get(&dev->kref); /* released in free_render_urbs() */ |
| 1561 | |
| 1562 | dl_notice("allocated %d %d byte urbs \n", i, (int) size); |
| 1563 | |
| 1564 | return i; |
| 1565 | } |
| 1566 | |
| 1567 | static struct urb *dlfb_get_urb(struct dlfb_data *dev) |
| 1568 | { |
| 1569 | int ret = 0; |
| 1570 | struct list_head *entry; |
| 1571 | struct urb_node *unode; |
| 1572 | struct urb *urb = NULL; |
| 1573 | unsigned long flags; |
| 1574 | |
| 1575 | /* Wait for an in-flight buffer to complete and get re-queued */ |
| 1576 | ret = down_timeout(&dev->urbs.limit_sem, GET_URB_TIMEOUT); |
| 1577 | if (ret) { |
| 1578 | atomic_set(&dev->lost_pixels, 1); |
| 1579 | dl_err("wait for urb interrupted: %x\n", ret); |
| 1580 | goto error; |
| 1581 | } |
| 1582 | |
| 1583 | spin_lock_irqsave(&dev->urbs.lock, flags); |
| 1584 | |
| 1585 | BUG_ON(list_empty(&dev->urbs.list)); /* reserved one with limit_sem */ |
| 1586 | entry = dev->urbs.list.next; |
| 1587 | list_del_init(entry); |
| 1588 | dev->urbs.available--; |
| 1589 | |
| 1590 | spin_unlock_irqrestore(&dev->urbs.lock, flags); |
| 1591 | |
| 1592 | unode = list_entry(entry, struct urb_node, entry); |
| 1593 | urb = unode->urb; |
| 1594 | |
| 1595 | error: |
| 1596 | return urb; |
| 1597 | } |
| 1598 | |
| 1599 | static int dlfb_submit_urb(struct dlfb_data *dev, struct urb *urb, size_t len) |
| 1600 | { |
| 1601 | int ret; |
| 1602 | |
| 1603 | BUG_ON(len > dev->urbs.size); |
| 1604 | |
| 1605 | urb->transfer_buffer_length = len; /* set to actual payload len */ |
| 1606 | ret = usb_submit_urb(urb, GFP_KERNEL); |
| 1607 | if (ret) { |
| 1608 | dlfb_urb_completion(urb); /* because no one else will */ |
| 1609 | atomic_set(&dev->lost_pixels, 1); |
| 1610 | dl_err("usb_submit_urb error %x\n", ret); |
| 1611 | } |
| 1612 | return ret; |
| 1613 | } |
| 1614 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1615 | MODULE_AUTHOR("Roberto De Ioris <roberto@unbit.it>, " |
| 1616 | "Jaya Kumar <jayakumar.lkml@gmail.com>"); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1617 | MODULE_DESCRIPTION(DRIVER_VERSION); |
| 1618 | MODULE_LICENSE("GPL"); |