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> |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 6 | * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com> |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 7 | * |
| 8 | * This file is subject to the terms and conditions of the GNU General Public |
| 9 | * License v2. See the file COPYING in the main directory of this archive for |
| 10 | * more details. |
| 11 | * |
| 12 | * Layout is based on skeletonfb by James Simmons and Geert Uytterhoeven, |
| 13 | * usb-skeleton by GregKH. |
| 14 | * |
| 15 | * Device-specific portions based on information from Displaylink, with work |
| 16 | * from Florian Echtler, Henrik Bjerregaard Pedersen, and others. |
| 17 | */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 18 | |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/usb.h> |
| 23 | #include <linux/uaccess.h> |
| 24 | #include <linux/mm.h> |
| 25 | #include <linux/fb.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 | static struct fb_fix_screeninfo dlfb_fix = { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 31 | .id = "udlfb", |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 32 | .type = FB_TYPE_PACKED_PIXELS, |
| 33 | .visual = FB_VISUAL_TRUECOLOR, |
| 34 | .xpanstep = 0, |
| 35 | .ypanstep = 0, |
| 36 | .ywrapstep = 0, |
| 37 | .accel = FB_ACCEL_NONE, |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 38 | }; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 39 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 40 | static const u32 udlfb_info_flags = FBINFO_DEFAULT | FBINFO_READS_FAST | |
| 41 | #ifdef FBINFO_VIRTFB |
| 42 | FBINFO_VIRTFB | |
| 43 | #endif |
| 44 | FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_FILLRECT | |
| 45 | FBINFO_HWACCEL_COPYAREA | FBINFO_MISC_ALWAYS_SETPAR; |
| 46 | |
Bernie Thompson | cc403dc | 2010-02-15 06:45:49 -0800 | [diff] [blame] | 47 | /* |
| 48 | * There are many DisplayLink-based products, all with unique PIDs. We are able |
| 49 | * to support all volume ones (circa 2009) with a single driver, so we match |
| 50 | * globally on VID. TODO: Probe() needs to detect when we might be running |
| 51 | * "future" chips, and bail on those, so a compatible driver can match. |
| 52 | */ |
| 53 | static struct usb_device_id id_table[] = { |
| 54 | {.idVendor = 0x17e9, .match_flags = USB_DEVICE_ID_MATCH_VENDOR,}, |
| 55 | {}, |
| 56 | }; |
| 57 | MODULE_DEVICE_TABLE(usb, id_table); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 58 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 59 | /* dlfb keeps a list of urbs for efficient bulk transfers */ |
| 60 | static void dlfb_urb_completion(struct urb *urb); |
| 61 | static struct urb *dlfb_get_urb(struct dlfb_data *dev); |
| 62 | static int dlfb_submit_urb(struct dlfb_data *dev, struct urb * urb, size_t len); |
| 63 | static int dlfb_alloc_urb_list(struct dlfb_data *dev, int count, size_t size); |
| 64 | static void dlfb_free_urb_list(struct dlfb_data *dev); |
| 65 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 66 | /* |
| 67 | * Inserts a specific DisplayLink controller command into the provided |
| 68 | * buffer. |
| 69 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 70 | static char *dlfb_set_register(char *buf, u8 reg, u8 val) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 71 | { |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 72 | *buf++ = 0xAF; |
| 73 | *buf++ = 0x20; |
| 74 | *buf++ = reg; |
| 75 | *buf++ = val; |
| 76 | return buf; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 77 | } |
| 78 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 79 | static char *dlfb_vidreg_lock(char *buf) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 80 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 81 | return dlfb_set_register(buf, 0xFF, 0x00); |
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 | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 84 | static char *dlfb_vidreg_unlock(char *buf) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 85 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 86 | return dlfb_set_register(buf, 0xFF, 0xFF); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 87 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 88 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 89 | /* |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 90 | * On/Off for driving the DisplayLink framebuffer to the display |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 91 | */ |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 92 | static char *dlfb_enable_hvsync(char *buf, bool enable) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 93 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 94 | if (enable) |
| 95 | return dlfb_set_register(buf, 0x1F, 0x00); |
| 96 | else |
| 97 | return dlfb_set_register(buf, 0x1F, 0x01); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 98 | } |
| 99 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 100 | static char *dlfb_set_color_depth(char *buf, u8 selection) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 101 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 102 | return dlfb_set_register(buf, 0x00, selection); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 103 | } |
| 104 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 105 | static char *dlfb_set_base16bpp(char *wrptr, u32 base) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 106 | { |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 107 | /* the base pointer is 16 bits wide, 0x20 is hi byte. */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 108 | wrptr = dlfb_set_register(wrptr, 0x20, base >> 16); |
| 109 | wrptr = dlfb_set_register(wrptr, 0x21, base >> 8); |
| 110 | return dlfb_set_register(wrptr, 0x22, 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_base8bpp(char *wrptr, u32 base) |
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, 0x26, base >> 16); |
| 116 | wrptr = dlfb_set_register(wrptr, 0x27, base >> 8); |
| 117 | return dlfb_set_register(wrptr, 0x28, base); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 118 | } |
| 119 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 120 | static char *dlfb_set_register_16(char *wrptr, u8 reg, u16 value) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 121 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 122 | wrptr = dlfb_set_register(wrptr, reg, value >> 8); |
| 123 | return dlfb_set_register(wrptr, reg+1, value); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | /* |
| 127 | * This is kind of weird because the controller takes some |
| 128 | * register values in a different byte order than other registers. |
| 129 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 130 | static char *dlfb_set_register_16be(char *wrptr, u8 reg, u16 value) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 131 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 132 | wrptr = dlfb_set_register(wrptr, reg, value); |
| 133 | return dlfb_set_register(wrptr, reg+1, value >> 8); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | /* |
| 137 | * LFSR is linear feedback shift register. The reason we have this is |
| 138 | * because the display controller needs to minimize the clock depth of |
| 139 | * various counters used in the display path. So this code reverses the |
| 140 | * provided value into the lfsr16 value by counting backwards to get |
| 141 | * the value that needs to be set in the hardware comparator to get the |
| 142 | * same actual count. This makes sense once you read above a couple of |
| 143 | * times and think about it from a hardware perspective. |
| 144 | */ |
| 145 | static u16 lfsr16(u16 actual_count) |
| 146 | { |
| 147 | u32 lv = 0xFFFF; /* This is the lfsr value that the hw starts with */ |
| 148 | |
| 149 | while (actual_count--) { |
| 150 | lv = ((lv << 1) | |
| 151 | (((lv >> 15) ^ (lv >> 4) ^ (lv >> 2) ^ (lv >> 1)) & 1)) |
| 152 | & 0xFFFF; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 153 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 154 | |
| 155 | return (u16) lv; |
| 156 | } |
| 157 | |
| 158 | /* |
| 159 | * This does LFSR conversion on the value that is to be written. |
| 160 | * See LFSR explanation above for more detail. |
| 161 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 162 | static char *dlfb_set_register_lfsr16(char *wrptr, u8 reg, u16 value) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 163 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 164 | return dlfb_set_register_16(wrptr, reg, lfsr16(value)); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | /* |
| 168 | * This takes a standard fbdev screeninfo struct and all of its monitor mode |
| 169 | * details and converts them into the DisplayLink equivalent register commands. |
| 170 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 171 | 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] | 172 | { |
| 173 | u16 xds, yds; |
| 174 | u16 xde, yde; |
| 175 | u16 yec; |
| 176 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 177 | /* x display start */ |
| 178 | xds = var->left_margin + var->hsync_len; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 179 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x01, xds); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 180 | /* x display end */ |
| 181 | xde = xds + var->xres; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 182 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x03, xde); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 183 | |
| 184 | /* y display start */ |
| 185 | yds = var->upper_margin + var->vsync_len; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 186 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x05, yds); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 187 | /* y display end */ |
| 188 | yde = yds + var->yres; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 189 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x07, yde); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 190 | |
| 191 | /* x end count is active + blanking - 1 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 192 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x09, |
| 193 | xde + var->right_margin - 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 194 | |
| 195 | /* libdlo hardcodes hsync start to 1 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 196 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x0B, 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 197 | |
| 198 | /* hsync end is width of sync pulse + 1 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 199 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x0D, var->hsync_len + 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 200 | |
| 201 | /* hpixels is active pixels */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 202 | wrptr = dlfb_set_register_16(wrptr, 0x0F, var->xres); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 203 | |
| 204 | /* yendcount is vertical active + vertical blanking */ |
| 205 | yec = var->yres + var->upper_margin + var->lower_margin + |
| 206 | var->vsync_len; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 207 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x11, yec); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 208 | |
| 209 | /* libdlo hardcodes vsync start to 0 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 210 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x13, 0); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 211 | |
| 212 | /* vsync end is width of vsync pulse */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 213 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x15, var->vsync_len); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 214 | |
| 215 | /* vpixels is active pixels */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 216 | wrptr = dlfb_set_register_16(wrptr, 0x17, var->yres); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 217 | |
| 218 | /* convert picoseconds to 5kHz multiple for pclk5k = x * 1E12/5k */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 219 | wrptr = dlfb_set_register_16be(wrptr, 0x1B, |
| 220 | 200*1000*1000/var->pixclock); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 221 | |
| 222 | return wrptr; |
| 223 | } |
| 224 | |
| 225 | /* |
| 226 | * This takes a standard fbdev screeninfo struct that was fetched or prepared |
| 227 | * and then generates the appropriate command sequence that then drives the |
| 228 | * display controller. |
| 229 | */ |
| 230 | static int dlfb_set_video_mode(struct dlfb_data *dev, |
| 231 | struct fb_var_screeninfo *var) |
| 232 | { |
| 233 | char *buf; |
| 234 | char *wrptr; |
| 235 | int retval = 0; |
| 236 | int writesize; |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 237 | struct urb *urb; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 238 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 239 | if (!atomic_read(&dev->usb_active)) |
| 240 | return -EPERM; |
| 241 | |
| 242 | urb = dlfb_get_urb(dev); |
| 243 | if (!urb) |
| 244 | return -ENOMEM; |
| 245 | buf = (char *) urb->transfer_buffer; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 246 | |
| 247 | /* |
| 248 | * This first section has to do with setting the base address on the |
| 249 | * controller * associated with the display. There are 2 base |
| 250 | * pointers, currently, we only * use the 16 bpp segment. |
| 251 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 252 | wrptr = dlfb_vidreg_lock(buf); |
| 253 | wrptr = dlfb_set_color_depth(wrptr, 0x00); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 254 | /* set base for 16bpp segment to 0 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 255 | wrptr = dlfb_set_base16bpp(wrptr, 0); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 256 | /* set base for 8bpp segment to end of fb */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 257 | wrptr = dlfb_set_base8bpp(wrptr, dev->info->fix.smem_len); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 258 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 259 | wrptr = dlfb_set_vid_cmds(wrptr, var); |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 260 | wrptr = dlfb_enable_hvsync(wrptr, true); |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 261 | wrptr = dlfb_vidreg_unlock(wrptr); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 262 | |
| 263 | writesize = wrptr - buf; |
| 264 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 265 | retval = dlfb_submit_urb(dev, urb, writesize); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 266 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 267 | return retval; |
| 268 | } |
| 269 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 270 | 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] | 271 | { |
| 272 | unsigned long start = vma->vm_start; |
| 273 | unsigned long size = vma->vm_end - vma->vm_start; |
| 274 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; |
| 275 | unsigned long page, pos; |
| 276 | |
| 277 | printk("MMAP: %lu %u\n", offset + size, info->fix.smem_len); |
| 278 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 279 | if (offset + size > info->fix.smem_len) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 280 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 281 | |
| 282 | pos = (unsigned long)info->fix.smem_start + offset; |
| 283 | |
| 284 | while (size > 0) { |
| 285 | page = vmalloc_to_pfn((void *)pos); |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 286 | if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 287 | return -EAGAIN; |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 288 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 289 | start += PAGE_SIZE; |
| 290 | pos += PAGE_SIZE; |
| 291 | if (size > PAGE_SIZE) |
| 292 | size -= PAGE_SIZE; |
| 293 | else |
| 294 | size = 0; |
| 295 | } |
| 296 | |
| 297 | vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ |
| 298 | return 0; |
| 299 | |
| 300 | } |
| 301 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 302 | /* |
| 303 | * Trims identical data from front and back of line |
| 304 | * Sets new front buffer address and width |
| 305 | * And returns byte count of identical pixels |
| 306 | * Assumes CPU natural alignment (unsigned long) |
| 307 | * for back and front buffer ptrs and width |
| 308 | */ |
| 309 | static int dlfb_trim_hline(const u8 *bback, const u8 **bfront, int *width_bytes) |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 310 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 311 | int j, k; |
| 312 | const unsigned long *back = (const unsigned long *) bback; |
| 313 | const unsigned long *front = (const unsigned long *) *bfront; |
| 314 | const int width = *width_bytes / sizeof(unsigned long); |
| 315 | int identical = width; |
| 316 | int start = width; |
| 317 | int end = width; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 318 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 319 | prefetch((void *) front); |
| 320 | prefetch((void *) back); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 321 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 322 | for (j = 0; j < width; j++) { |
| 323 | if (back[j] != front[j]) { |
| 324 | start = j; |
| 325 | break; |
| 326 | } |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 327 | } |
| 328 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 329 | for (k = width - 1; k > j; k--) { |
| 330 | if (back[k] != front[k]) { |
| 331 | end = k+1; |
| 332 | break; |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | identical = start + (width - end); |
| 337 | *bfront = (u8 *) &front[start]; |
| 338 | *width_bytes = (end - start) * sizeof(unsigned long); |
| 339 | |
| 340 | return identical * sizeof(unsigned long); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | /* |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 344 | Render a command stream for an encoded horizontal line segment of pixels. |
| 345 | |
| 346 | A command buffer holds several commands. |
| 347 | It always begins with a fresh command header |
| 348 | (the protocol doesn't require this, but we enforce it to allow |
| 349 | multiple buffers to be potentially encoded and sent in parallel). |
| 350 | A single command encodes one contiguous horizontal line of pixels |
| 351 | |
| 352 | The function relies on the client to do all allocation, so that |
| 353 | rendering can be done directly to output buffers (e.g. USB URBs). |
| 354 | The function fills the supplied command buffer, providing information |
| 355 | on where it left off, so the client may call in again with additional |
| 356 | buffers if the line will take several buffers to complete. |
| 357 | |
| 358 | A single command can transmit a maximum of 256 pixels, |
| 359 | regardless of the compression ratio (protocol design limit). |
| 360 | To the hardware, 0 for a size byte means 256 |
| 361 | |
| 362 | Rather than 256 pixel commands which are either rl or raw encoded, |
| 363 | the rlx command simply assumes alternating raw and rl spans within one cmd. |
| 364 | This has a slightly larger header overhead, but produces more even results. |
| 365 | It also processes all data (read and write) in a single pass. |
| 366 | Performance benchmarks of common cases show it having just slightly better |
| 367 | compression than 256 pixel raw -or- rle commands, with similar CPU consumpion. |
| 368 | But for very rl friendly data, will compress not quite as well. |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 369 | */ |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 370 | static void dlfb_compress_hline( |
| 371 | const uint16_t **pixel_start_ptr, |
| 372 | const uint16_t *const pixel_end, |
| 373 | uint32_t *device_address_ptr, |
| 374 | uint8_t **command_buffer_ptr, |
| 375 | const uint8_t *const cmd_buffer_end) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 376 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 377 | const uint16_t *pixel = *pixel_start_ptr; |
| 378 | uint32_t dev_addr = *device_address_ptr; |
| 379 | uint8_t *cmd = *command_buffer_ptr; |
| 380 | const int bpp = 2; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 381 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 382 | while ((pixel_end > pixel) && |
| 383 | (cmd_buffer_end - MIN_RLX_CMD_BYTES > cmd)) { |
| 384 | uint8_t *raw_pixels_count_byte = 0; |
| 385 | uint8_t *cmd_pixels_count_byte = 0; |
| 386 | const uint16_t *raw_pixel_start = 0; |
| 387 | const uint16_t *cmd_pixel_start, *cmd_pixel_end = 0; |
| 388 | const uint32_t be_dev_addr = cpu_to_be32(dev_addr); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 389 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 390 | prefetchw((void *) cmd); /* pull in one cache line at least */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 391 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 392 | *cmd++ = 0xAF; |
| 393 | *cmd++ = 0x6B; |
| 394 | *cmd++ = (uint8_t) ((be_dev_addr >> 8) & 0xFF); |
| 395 | *cmd++ = (uint8_t) ((be_dev_addr >> 16) & 0xFF); |
| 396 | *cmd++ = (uint8_t) ((be_dev_addr >> 24) & 0xFF); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 397 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 398 | cmd_pixels_count_byte = cmd++; /* we'll know this later */ |
| 399 | cmd_pixel_start = pixel; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 400 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 401 | raw_pixels_count_byte = cmd++; /* we'll know this later */ |
| 402 | raw_pixel_start = pixel; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 403 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 404 | cmd_pixel_end = pixel + min(MAX_CMD_PIXELS + 1, |
| 405 | min((int)(pixel_end - pixel), |
| 406 | (int)(cmd_buffer_end - cmd) / bpp)); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 407 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 408 | prefetch_range((void *) pixel, (cmd_pixel_end - pixel) * bpp); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 409 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 410 | while (pixel < cmd_pixel_end) { |
| 411 | const uint16_t * const repeating_pixel = pixel; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 412 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 413 | *(uint16_t *)cmd = cpu_to_be16p(pixel); |
| 414 | cmd += 2; |
| 415 | pixel++; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 416 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 417 | if (unlikely((pixel < cmd_pixel_end) && |
| 418 | (*pixel == *repeating_pixel))) { |
| 419 | /* go back and fill in raw pixel count */ |
| 420 | *raw_pixels_count_byte = ((repeating_pixel - |
| 421 | raw_pixel_start) + 1) & 0xFF; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 422 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 423 | while ((pixel < cmd_pixel_end) |
| 424 | && (*pixel == *repeating_pixel)) { |
| 425 | pixel++; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 426 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 427 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 428 | /* immediately after raw data is repeat byte */ |
| 429 | *cmd++ = ((pixel - repeating_pixel) - 1) & 0xFF; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 430 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 431 | /* Then start another raw pixel span */ |
| 432 | raw_pixel_start = pixel; |
| 433 | raw_pixels_count_byte = cmd++; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 434 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 435 | } |
| 436 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 437 | if (pixel > raw_pixel_start) { |
| 438 | /* finalize last RAW span */ |
| 439 | *raw_pixels_count_byte = (pixel-raw_pixel_start) & 0xFF; |
| 440 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 441 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 442 | *cmd_pixels_count_byte = (pixel - cmd_pixel_start) & 0xFF; |
| 443 | dev_addr += (pixel - cmd_pixel_start) * bpp; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 444 | } |
| 445 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 446 | if (cmd_buffer_end <= MIN_RLX_CMD_BYTES + cmd) { |
| 447 | /* Fill leftover bytes with no-ops */ |
| 448 | if (cmd_buffer_end > cmd) |
| 449 | memset(cmd, 0xAF, cmd_buffer_end - cmd); |
| 450 | cmd = (uint8_t *) cmd_buffer_end; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 451 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 452 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 453 | *command_buffer_ptr = cmd; |
| 454 | *pixel_start_ptr = pixel; |
| 455 | *device_address_ptr = dev_addr; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 456 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 457 | return; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 458 | } |
| 459 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 460 | /* |
| 461 | * There are 3 copies of every pixel: The front buffer that the fbdev |
| 462 | * client renders to, the actual framebuffer across the USB bus in hardware |
| 463 | * (that we can only write to, slowly, and can never read), and (optionally) |
| 464 | * our shadow copy that tracks what's been sent to that hardware buffer. |
| 465 | */ |
| 466 | static void dlfb_render_hline(struct dlfb_data *dev, struct urb **urb_ptr, |
| 467 | const char *front, char **urb_buf_ptr, |
| 468 | u32 byte_offset, u32 byte_width, |
| 469 | int *ident_ptr, int *sent_ptr) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 470 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 471 | const u8 *line_start, *line_end, *next_pixel; |
| 472 | u32 dev_addr = dev->base16 + byte_offset; |
| 473 | struct urb *urb = *urb_ptr; |
| 474 | u8 *cmd = *urb_buf_ptr; |
| 475 | u8 *cmd_end = (u8 *) urb->transfer_buffer + urb->transfer_buffer_length; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 476 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 477 | line_start = (u8 *) (front + byte_offset); |
| 478 | next_pixel = line_start; |
| 479 | line_end = next_pixel + byte_width; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 480 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 481 | if (dev->backing_buffer) { |
| 482 | int offset; |
| 483 | const u8 *back_start = (u8 *) (dev->backing_buffer |
| 484 | + byte_offset); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 485 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 486 | *ident_ptr += dlfb_trim_hline(back_start, &next_pixel, |
| 487 | &byte_width); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 488 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 489 | offset = next_pixel - line_start; |
| 490 | line_end = next_pixel + byte_width; |
| 491 | dev_addr += offset; |
| 492 | back_start += offset; |
| 493 | line_start += offset; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 494 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 495 | memcpy((char *)back_start, (char *) line_start, |
| 496 | byte_width); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 497 | } |
| 498 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 499 | while (next_pixel < line_end) { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 500 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 501 | dlfb_compress_hline((const uint16_t **) &next_pixel, |
| 502 | (const uint16_t *) line_end, &dev_addr, |
| 503 | (u8 **) &cmd, (u8 *) cmd_end); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 504 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 505 | if (cmd >= cmd_end) { |
| 506 | int len = cmd - (u8 *) urb->transfer_buffer; |
| 507 | if (dlfb_submit_urb(dev, urb, len)) |
| 508 | return; /* lost pixels is set */ |
| 509 | *sent_ptr += len; |
| 510 | urb = dlfb_get_urb(dev); |
| 511 | if (!urb) |
| 512 | return; /* lost_pixels is set */ |
| 513 | *urb_ptr = urb; |
| 514 | cmd = urb->transfer_buffer; |
| 515 | cmd_end = &cmd[urb->transfer_buffer_length]; |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | *urb_buf_ptr = cmd; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 520 | } |
| 521 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 522 | int dlfb_handle_damage(struct dlfb_data *dev, int x, int y, |
| 523 | int width, int height, char *data) |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 524 | { |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 525 | int i, ret; |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 526 | char *cmd; |
| 527 | cycles_t start_cycles, end_cycles; |
| 528 | int bytes_sent = 0; |
| 529 | int bytes_identical = 0; |
| 530 | struct urb *urb; |
| 531 | int aligned_x; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 532 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 533 | start_cycles = get_cycles(); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 534 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 535 | aligned_x = DL_ALIGN_DOWN(x, sizeof(unsigned long)); |
| 536 | width = DL_ALIGN_UP(width + (x-aligned_x), sizeof(unsigned long)); |
| 537 | x = aligned_x; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 538 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 539 | if ((width <= 0) || |
| 540 | (x + width > dev->info->var.xres) || |
| 541 | (y + height > dev->info->var.yres)) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 542 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 543 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 544 | if (!atomic_read(&dev->usb_active)) |
| 545 | return 0; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 546 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 547 | urb = dlfb_get_urb(dev); |
| 548 | if (!urb) |
| 549 | return 0; |
| 550 | cmd = urb->transfer_buffer; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 551 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 552 | for (i = y; i < y + height ; i++) { |
| 553 | const int line_offset = dev->info->fix.line_length * i; |
| 554 | const int byte_offset = line_offset + (x * BPP); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 555 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 556 | dlfb_render_hline(dev, &urb, (char *) dev->info->fix.smem_start, |
| 557 | &cmd, byte_offset, width * BPP, |
| 558 | &bytes_identical, &bytes_sent); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 559 | } |
| 560 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 561 | if (cmd > (char *) urb->transfer_buffer) { |
| 562 | /* Send partial buffer remaining before exiting */ |
| 563 | int len = cmd - (char *) urb->transfer_buffer; |
| 564 | ret = dlfb_submit_urb(dev, urb, len); |
| 565 | bytes_sent += len; |
| 566 | } else |
| 567 | dlfb_urb_completion(urb); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 568 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 569 | atomic_add(bytes_sent, &dev->bytes_sent); |
| 570 | atomic_add(bytes_identical, &dev->bytes_identical); |
| 571 | atomic_add(width*height*2, &dev->bytes_rendered); |
| 572 | end_cycles = get_cycles(); |
| 573 | atomic_add(((unsigned int) ((end_cycles - start_cycles) |
| 574 | >> 10)), /* Kcycles */ |
| 575 | &dev->cpu_kcycles_used); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 576 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 577 | return 0; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 578 | } |
| 579 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 580 | /* hardware has native COPY command (see libdlo), but not worth it for fbcon */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 581 | static void dlfb_ops_copyarea(struct fb_info *info, |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 582 | const struct fb_copyarea *area) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 583 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 584 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 585 | struct dlfb_data *dev = info->par; |
| 586 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 587 | #if defined CONFIG_FB_SYS_COPYAREA || defined CONFIG_FB_SYS_COPYAREA_MODULE |
| 588 | |
| 589 | sys_copyarea(info, area); |
| 590 | |
| 591 | dlfb_handle_damage(dev, area->dx, area->dy, |
| 592 | area->width, area->height, info->screen_base); |
| 593 | #endif |
| 594 | atomic_inc(&dev->copy_count); |
| 595 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 596 | } |
| 597 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 598 | static void dlfb_ops_imageblit(struct fb_info *info, |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 599 | const struct fb_image *image) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 600 | { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 601 | struct dlfb_data *dev = info->par; |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 602 | |
| 603 | #if defined CONFIG_FB_SYS_IMAGEBLIT || defined CONFIG_FB_SYS_IMAGEBLIT_MODULE |
| 604 | |
| 605 | sys_imageblit(info, image); |
| 606 | |
| 607 | dlfb_handle_damage(dev, image->dx, image->dy, |
| 608 | image->width, image->height, info->screen_base); |
| 609 | |
| 610 | #endif |
| 611 | |
| 612 | atomic_inc(&dev->blit_count); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 613 | } |
| 614 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 615 | static void dlfb_ops_fillrect(struct fb_info *info, |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 616 | const struct fb_fillrect *rect) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 617 | { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 618 | struct dlfb_data *dev = info->par; |
| 619 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 620 | #if defined CONFIG_FB_SYS_FILLRECT || defined CONFIG_FB_SYS_FILLRECT_MODULE |
| 621 | |
| 622 | sys_fillrect(info, rect); |
| 623 | |
| 624 | dlfb_handle_damage(dev, rect->dx, rect->dy, rect->width, |
| 625 | rect->height, info->screen_base); |
| 626 | #endif |
| 627 | |
| 628 | atomic_inc(&dev->fill_count); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 629 | |
| 630 | } |
| 631 | |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 632 | static void dlfb_get_edid(struct dlfb_data *dev) |
| 633 | { |
| 634 | int i; |
| 635 | int ret; |
| 636 | char rbuf[2]; |
| 637 | |
| 638 | for (i = 0; i < sizeof(dev->edid); i++) { |
| 639 | ret = usb_control_msg(dev->udev, |
| 640 | usb_rcvctrlpipe(dev->udev, 0), (0x02), |
| 641 | (0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2, |
| 642 | 0); |
| 643 | dev->edid[i] = rbuf[1]; |
| 644 | } |
| 645 | } |
| 646 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 647 | static int dlfb_ops_ioctl(struct fb_info *info, unsigned int cmd, |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 648 | unsigned long arg) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 649 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 650 | |
| 651 | struct dlfb_data *dev = info->par; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 652 | struct dloarea *area = NULL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 653 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 654 | if (!atomic_read(&dev->usb_active)) |
| 655 | return 0; |
| 656 | |
| 657 | /* TODO: Update X server to get this from sysfs instead */ |
| 658 | if (cmd == DLFB_IOCTL_RETURN_EDID) { |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 659 | char *edid = (char *)arg; |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 660 | dlfb_get_edid(dev); |
| 661 | if (copy_to_user(edid, dev->edid, sizeof(dev->edid))) |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 662 | return -EFAULT; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 663 | return 0; |
| 664 | } |
| 665 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 666 | /* TODO: Help propose a standard fb.h ioctl to report mmap damage */ |
| 667 | if (cmd == DLFB_IOCTL_REPORT_DAMAGE) { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 668 | |
| 669 | area = (struct dloarea *)arg; |
| 670 | |
| 671 | if (area->x < 0) |
| 672 | area->x = 0; |
| 673 | |
| 674 | if (area->x > info->var.xres) |
| 675 | area->x = info->var.xres; |
| 676 | |
| 677 | if (area->y < 0) |
| 678 | area->y = 0; |
| 679 | |
| 680 | if (area->y > info->var.yres) |
| 681 | area->y = info->var.yres; |
| 682 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 683 | atomic_set(&dev->use_defio, 0); |
| 684 | |
| 685 | dlfb_handle_damage(dev, area->x, area->y, area->w, area->h, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 686 | info->screen_base); |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 687 | atomic_inc(&dev->damage_count); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 688 | } |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 689 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 690 | return 0; |
| 691 | } |
| 692 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 693 | /* taken from vesafb */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 694 | static int |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 695 | dlfb_ops_setcolreg(unsigned regno, unsigned red, unsigned green, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 696 | unsigned blue, unsigned transp, struct fb_info *info) |
| 697 | { |
| 698 | int err = 0; |
| 699 | |
| 700 | if (regno >= info->cmap.len) |
| 701 | return 1; |
| 702 | |
| 703 | if (regno < 16) { |
| 704 | if (info->var.red.offset == 10) { |
| 705 | /* 1:5:5:5 */ |
| 706 | ((u32 *) (info->pseudo_palette))[regno] = |
| 707 | ((red & 0xf800) >> 1) | |
| 708 | ((green & 0xf800) >> 6) | ((blue & 0xf800) >> 11); |
| 709 | } else { |
| 710 | /* 0:5:6:5 */ |
| 711 | ((u32 *) (info->pseudo_palette))[regno] = |
| 712 | ((red & 0xf800)) | |
| 713 | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11); |
| 714 | } |
| 715 | } |
| 716 | |
| 717 | return err; |
| 718 | } |
| 719 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 720 | static int dlfb_ops_release(struct fb_info *info, int user) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 721 | { |
| 722 | struct dlfb_data *dev_info = info->par; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 723 | return 0; |
| 724 | } |
| 725 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 726 | /* |
| 727 | * Called when all client interfaces to start transactions have been disabled, |
| 728 | * and all references to our device instance (dlfb_data) are released. |
| 729 | * Every transaction must have a reference, so we know are fully spun down |
| 730 | */ |
| 731 | static void dlfb_delete(struct kref *kref) |
| 732 | { |
| 733 | struct dlfb_data *dev = container_of(kref, struct dlfb_data, kref); |
| 734 | |
| 735 | if (dev->backing_buffer) |
| 736 | vfree(dev->backing_buffer); |
| 737 | |
| 738 | kfree(dev); |
| 739 | } |
| 740 | |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 741 | /* |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 742 | * Called by fbdev as last part of unregister_framebuffer() process |
| 743 | * No new clients can open connections. Deallocate everything fb_info. |
| 744 | */ |
| 745 | static void dlfb_ops_destroy(struct fb_info *info) |
| 746 | { |
| 747 | struct dlfb_data *dev = info->par; |
| 748 | |
| 749 | if (info->cmap.len != 0) |
| 750 | fb_dealloc_cmap(&info->cmap); |
| 751 | if (info->monspecs.modedb) |
| 752 | fb_destroy_modedb(info->monspecs.modedb); |
| 753 | if (info->screen_base) |
| 754 | vfree(info->screen_base); |
| 755 | |
| 756 | fb_destroy_modelist(&info->modelist); |
| 757 | |
| 758 | framebuffer_release(info); |
| 759 | |
| 760 | /* ref taken before register_framebuffer() for dlfb_data clients */ |
| 761 | kref_put(&dev->kref, dlfb_delete); |
| 762 | } |
| 763 | |
| 764 | /* |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 765 | * Check whether a video mode is supported by the DisplayLink chip |
| 766 | * We start from monitor's modes, so don't need to filter that here |
| 767 | */ |
| 768 | static int dlfb_is_valid_mode(struct fb_videomode *mode, |
| 769 | struct fb_info *info) |
| 770 | { |
| 771 | struct dlfb_data *dev = info->par; |
| 772 | |
| 773 | if (mode->xres * mode->yres > dev->sku_pixel_limit) |
| 774 | return 0; |
| 775 | |
| 776 | return 1; |
| 777 | } |
| 778 | |
| 779 | static void dlfb_var_color_format(struct fb_var_screeninfo *var) |
| 780 | { |
| 781 | const struct fb_bitfield red = { 11, 5, 0 }; |
| 782 | const struct fb_bitfield green = { 5, 6, 0 }; |
| 783 | const struct fb_bitfield blue = { 0, 5, 0 }; |
| 784 | |
| 785 | var->bits_per_pixel = 16; |
| 786 | var->red = red; |
| 787 | var->green = green; |
| 788 | var->blue = blue; |
| 789 | } |
| 790 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 791 | static int dlfb_ops_check_var(struct fb_var_screeninfo *var, |
| 792 | struct fb_info *info) |
| 793 | { |
| 794 | struct fb_videomode mode; |
| 795 | |
| 796 | /* TODO: support dynamically changing framebuffer size */ |
| 797 | if ((var->xres * var->yres * 2) > info->fix.smem_len) |
| 798 | return -EINVAL; |
| 799 | |
| 800 | /* set device-specific elements of var unrelated to mode */ |
| 801 | dlfb_var_color_format(var); |
| 802 | |
| 803 | fb_var_to_videomode(&mode, var); |
| 804 | |
| 805 | if (!dlfb_is_valid_mode(&mode, info)) |
| 806 | return -EINVAL; |
| 807 | |
| 808 | return 0; |
| 809 | } |
| 810 | |
| 811 | static int dlfb_ops_set_par(struct fb_info *info) |
| 812 | { |
| 813 | struct dlfb_data *dev = info->par; |
| 814 | |
| 815 | dl_notice("set_par mode %dx%d\n", info->var.xres, info->var.yres); |
| 816 | |
| 817 | return dlfb_set_video_mode(dev, &info->var); |
| 818 | } |
| 819 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 820 | 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] | 821 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 822 | struct dlfb_data *dev = info->par; |
| 823 | char *bufptr; |
| 824 | struct urb *urb; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 825 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 826 | urb = dlfb_get_urb(dev); |
| 827 | if (!urb) |
| 828 | return 0; |
| 829 | bufptr = (char *) urb->transfer_buffer; |
| 830 | |
| 831 | /* overloading usb_active. UNBLANK can conflict with teardown */ |
| 832 | |
| 833 | bufptr = dlfb_vidreg_lock(bufptr); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 834 | if (blank_mode != FB_BLANK_UNBLANK) { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 835 | atomic_set(&dev->usb_active, 0); |
| 836 | bufptr = dlfb_enable_hvsync(bufptr, false); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 837 | } else { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 838 | atomic_set(&dev->usb_active, 1); |
| 839 | bufptr = dlfb_enable_hvsync(bufptr, true); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 840 | } |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 841 | bufptr = dlfb_vidreg_unlock(bufptr); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 842 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 843 | dlfb_submit_urb(dev, urb, bufptr - (char *) urb->transfer_buffer); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 844 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 845 | return 0; |
| 846 | } |
| 847 | |
| 848 | static struct fb_ops dlfb_ops = { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 849 | .owner = THIS_MODULE, |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 850 | .fb_setcolreg = dlfb_ops_setcolreg, |
| 851 | .fb_fillrect = dlfb_ops_fillrect, |
| 852 | .fb_copyarea = dlfb_ops_copyarea, |
| 853 | .fb_imageblit = dlfb_ops_imageblit, |
| 854 | .fb_mmap = dlfb_ops_mmap, |
| 855 | .fb_ioctl = dlfb_ops_ioctl, |
| 856 | .fb_release = dlfb_ops_release, |
| 857 | .fb_blank = dlfb_ops_blank, |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 858 | .fb_check_var = dlfb_ops_check_var, |
| 859 | .fb_set_par = dlfb_ops_set_par, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 860 | }; |
| 861 | |
Bernie Thompson | cc403dc | 2010-02-15 06:45:49 -0800 | [diff] [blame] | 862 | /* |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 863 | * Calls dlfb_get_edid() to query the EDID of attached monitor via usb cmds |
| 864 | * Then parses EDID into three places used by various parts of fbdev: |
| 865 | * fb_var_screeninfo contains the timing of the monitor's preferred mode |
| 866 | * fb_info.monspecs is full parsed EDID info, including monspecs.modedb |
| 867 | * fb_info.modelist is a linked list of all monitor & VESA modes which work |
| 868 | * |
| 869 | * If EDID is not readable/valid, then modelist is all VESA modes, |
| 870 | * monspecs is NULL, and fb_var_screeninfo is set to safe VESA mode |
| 871 | * Returns 0 if EDID parses successfully |
| 872 | */ |
| 873 | static int dlfb_parse_edid(struct dlfb_data *dev, |
| 874 | struct fb_var_screeninfo *var, |
| 875 | struct fb_info *info) |
| 876 | { |
| 877 | int i; |
| 878 | const struct fb_videomode *default_vmode = NULL; |
| 879 | int result = 0; |
| 880 | |
| 881 | fb_destroy_modelist(&info->modelist); |
| 882 | memset(&info->monspecs, 0, sizeof(info->monspecs)); |
| 883 | |
| 884 | dlfb_get_edid(dev); |
| 885 | fb_edid_to_monspecs(dev->edid, &info->monspecs); |
| 886 | |
| 887 | if (info->monspecs.modedb_len > 0) { |
| 888 | |
| 889 | for (i = 0; i < info->monspecs.modedb_len; i++) { |
| 890 | if (dlfb_is_valid_mode(&info->monspecs.modedb[i], info)) |
| 891 | fb_add_videomode(&info->monspecs.modedb[i], |
| 892 | &info->modelist); |
| 893 | } |
| 894 | |
| 895 | default_vmode = fb_find_best_display(&info->monspecs, |
| 896 | &info->modelist); |
| 897 | } else { |
| 898 | struct fb_videomode fb_vmode = {0}; |
| 899 | |
| 900 | dl_err("Unable to get valid EDID from device/display\n"); |
| 901 | result = 1; |
| 902 | |
| 903 | /* |
| 904 | * Add the standard VESA modes to our modelist |
| 905 | * Since we don't have EDID, there may be modes that |
| 906 | * overspec monitor and/or are incorrect aspect ratio, etc. |
| 907 | * But at least the user has a chance to choose |
| 908 | */ |
| 909 | for (i = 0; i < VESA_MODEDB_SIZE; i++) { |
| 910 | if (dlfb_is_valid_mode((struct fb_videomode *) |
| 911 | &vesa_modes[i], info)) |
| 912 | fb_add_videomode(&vesa_modes[i], |
| 913 | &info->modelist); |
| 914 | } |
| 915 | |
| 916 | /* |
| 917 | * default to resolution safe for projectors |
| 918 | * (since they are most common case without EDID) |
| 919 | */ |
| 920 | fb_vmode.xres = 800; |
| 921 | fb_vmode.yres = 600; |
| 922 | fb_vmode.refresh = 60; |
| 923 | default_vmode = fb_find_nearest_mode(&fb_vmode, |
| 924 | &info->modelist); |
| 925 | } |
| 926 | |
| 927 | fb_videomode_to_var(var, default_vmode); |
| 928 | dlfb_var_color_format(var); |
| 929 | |
| 930 | return result; |
| 931 | } |
| 932 | |
| 933 | static ssize_t metrics_bytes_rendered_show(struct device *fbdev, |
| 934 | struct device_attribute *a, char *buf) { |
| 935 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 936 | struct dlfb_data *dev = fb_info->par; |
| 937 | return snprintf(buf, PAGE_SIZE, "%u\n", |
| 938 | atomic_read(&dev->bytes_rendered)); |
| 939 | } |
| 940 | |
| 941 | static ssize_t metrics_bytes_identical_show(struct device *fbdev, |
| 942 | struct device_attribute *a, char *buf) { |
| 943 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 944 | struct dlfb_data *dev = fb_info->par; |
| 945 | return snprintf(buf, PAGE_SIZE, "%u\n", |
| 946 | atomic_read(&dev->bytes_identical)); |
| 947 | } |
| 948 | |
| 949 | static ssize_t metrics_bytes_sent_show(struct device *fbdev, |
| 950 | struct device_attribute *a, char *buf) { |
| 951 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 952 | struct dlfb_data *dev = fb_info->par; |
| 953 | return snprintf(buf, PAGE_SIZE, "%u\n", |
| 954 | atomic_read(&dev->bytes_sent)); |
| 955 | } |
| 956 | |
| 957 | static ssize_t metrics_cpu_kcycles_used_show(struct device *fbdev, |
| 958 | struct device_attribute *a, char *buf) { |
| 959 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 960 | struct dlfb_data *dev = fb_info->par; |
| 961 | return snprintf(buf, PAGE_SIZE, "%u\n", |
| 962 | atomic_read(&dev->cpu_kcycles_used)); |
| 963 | } |
| 964 | |
| 965 | static ssize_t metrics_misc_show(struct device *fbdev, |
| 966 | struct device_attribute *a, char *buf) { |
| 967 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 968 | struct dlfb_data *dev = fb_info->par; |
| 969 | return snprintf(buf, PAGE_SIZE, |
| 970 | "Calls to\ndamage: %u\nblit: %u\n" |
| 971 | "defio faults: %u\ncopy: %u\n" |
| 972 | "fill: %u\n\n" |
| 973 | "active framebuffer clients: %d\n" |
| 974 | "urbs available %d(%d)\n" |
| 975 | "Shadow framebuffer in use? %s\n" |
| 976 | "Any lost pixels? %s\n", |
| 977 | atomic_read(&dev->damage_count), |
| 978 | atomic_read(&dev->blit_count), |
| 979 | atomic_read(&dev->defio_fault_count), |
| 980 | atomic_read(&dev->copy_count), |
| 981 | atomic_read(&dev->fill_count), |
| 982 | dev->fb_count, |
| 983 | dev->urbs.available, dev->urbs.limit_sem.count, |
| 984 | (dev->backing_buffer) ? "yes" : "no", |
| 985 | atomic_read(&dev->lost_pixels) ? "yes" : "no"); |
| 986 | } |
| 987 | |
| 988 | static ssize_t edid_show(struct kobject *kobj, struct bin_attribute *a, |
| 989 | char *buf, loff_t off, size_t count) { |
| 990 | struct device *fbdev = container_of(kobj, struct device, kobj); |
| 991 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 992 | struct dlfb_data *dev = fb_info->par; |
| 993 | char *edid = &dev->edid[0]; |
| 994 | const size_t size = sizeof(dev->edid); |
| 995 | |
| 996 | if (dlfb_parse_edid(dev, &fb_info->var, fb_info)) |
| 997 | return 0; |
| 998 | |
| 999 | if (off >= size) |
| 1000 | return 0; |
| 1001 | |
| 1002 | if (off + count > size) |
| 1003 | count = size - off; |
| 1004 | memcpy(buf, edid + off, count); |
| 1005 | |
| 1006 | return count; |
| 1007 | } |
| 1008 | |
| 1009 | |
| 1010 | static ssize_t metrics_reset_store(struct device *fbdev, |
| 1011 | struct device_attribute *attr, |
| 1012 | const char *buf, size_t count) |
| 1013 | { |
| 1014 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1015 | struct dlfb_data *dev = fb_info->par; |
| 1016 | |
| 1017 | atomic_set(&dev->bytes_rendered, 0); |
| 1018 | atomic_set(&dev->bytes_identical, 0); |
| 1019 | atomic_set(&dev->bytes_sent, 0); |
| 1020 | atomic_set(&dev->cpu_kcycles_used, 0); |
| 1021 | atomic_set(&dev->blit_count, 0); |
| 1022 | atomic_set(&dev->copy_count, 0); |
| 1023 | atomic_set(&dev->fill_count, 0); |
| 1024 | atomic_set(&dev->defio_fault_count, 0); |
| 1025 | atomic_set(&dev->damage_count, 0); |
| 1026 | |
| 1027 | return count; |
| 1028 | } |
| 1029 | |
| 1030 | static ssize_t use_defio_show(struct device *fbdev, |
| 1031 | struct device_attribute *a, char *buf) { |
| 1032 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1033 | struct dlfb_data *dev = fb_info->par; |
| 1034 | return snprintf(buf, PAGE_SIZE, "%d\n", |
| 1035 | atomic_read(&dev->use_defio)); |
| 1036 | } |
| 1037 | |
| 1038 | static ssize_t use_defio_store(struct device *fbdev, |
| 1039 | struct device_attribute *attr, |
| 1040 | const char *buf, size_t count) |
| 1041 | { |
| 1042 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1043 | struct dlfb_data *dev = fb_info->par; |
| 1044 | |
| 1045 | if (count > 0) { |
| 1046 | if (buf[0] == '0') |
| 1047 | atomic_set(&dev->use_defio, 0); |
| 1048 | if (buf[0] == '1') |
| 1049 | atomic_set(&dev->use_defio, 1); |
| 1050 | } |
| 1051 | return count; |
| 1052 | } |
| 1053 | |
| 1054 | static struct bin_attribute edid_attr = { |
| 1055 | .attr.name = "edid", |
| 1056 | .attr.mode = 0444, |
| 1057 | .size = 128, |
| 1058 | .read = edid_show, |
| 1059 | }; |
| 1060 | |
| 1061 | static struct device_attribute fb_device_attrs[] = { |
| 1062 | __ATTR_RO(metrics_bytes_rendered), |
| 1063 | __ATTR_RO(metrics_bytes_identical), |
| 1064 | __ATTR_RO(metrics_bytes_sent), |
| 1065 | __ATTR_RO(metrics_cpu_kcycles_used), |
| 1066 | __ATTR_RO(metrics_misc), |
| 1067 | __ATTR(metrics_reset, S_IWUGO, NULL, metrics_reset_store), |
| 1068 | __ATTR_RW(use_defio), |
| 1069 | }; |
| 1070 | |
| 1071 | /* |
Bernie Thompson | cc403dc | 2010-02-15 06:45:49 -0800 | [diff] [blame] | 1072 | * This is necessary before we can communicate with the display controller. |
| 1073 | */ |
| 1074 | static int dlfb_select_std_channel(struct dlfb_data *dev) |
| 1075 | { |
| 1076 | int ret; |
| 1077 | u8 set_def_chn[] = { 0x57, 0xCD, 0xDC, 0xA7, |
| 1078 | 0x1C, 0x88, 0x5E, 0x15, |
| 1079 | 0x60, 0xFE, 0xC6, 0x97, |
| 1080 | 0x16, 0x3D, 0x47, 0xF2 }; |
| 1081 | |
| 1082 | ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), |
| 1083 | NR_USB_REQUEST_CHANNEL, |
| 1084 | (USB_DIR_OUT | USB_TYPE_VENDOR), 0, 0, |
| 1085 | set_def_chn, sizeof(set_def_chn), USB_CTRL_SET_TIMEOUT); |
| 1086 | return ret; |
| 1087 | } |
| 1088 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1089 | |
| 1090 | static int dlfb_usb_probe(struct usb_interface *interface, |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1091 | const struct usb_device_id *id) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1092 | { |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1093 | struct usb_device *usbdev; |
| 1094 | struct dlfb_data *dev; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1095 | struct fb_info *info; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1096 | int videomemorysize; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1097 | int i; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1098 | unsigned char *videomemory; |
| 1099 | int retval = -ENOMEM; |
| 1100 | struct fb_var_screeninfo *var; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1101 | int registered = 0; |
| 1102 | u16 *pix_framebuffer; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1103 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1104 | /* usb initialization */ |
| 1105 | |
| 1106 | usbdev = interface_to_usbdev(interface); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1107 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1108 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 1109 | if (dev == NULL) { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1110 | err("dlfb_usb_probe: failed alloc of dev struct\n"); |
| 1111 | goto error; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1112 | } |
| 1113 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1114 | /* we need to wait for both usb and fbdev to spin down on disconnect */ |
| 1115 | kref_init(&dev->kref); /* matching kref_put in usb .disconnect fn */ |
| 1116 | kref_get(&dev->kref); /* matching kref_put in .fb_destroy function*/ |
| 1117 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1118 | dev->udev = usbdev; |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1119 | dev->gdev = &usbdev->dev; /* our generic struct device * */ |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1120 | usb_set_intfdata(interface, dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1121 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1122 | if (!dlfb_alloc_urb_list(dev, WRITES_IN_FLIGHT, MAX_TRANSFER)) { |
| 1123 | retval = -ENOMEM; |
| 1124 | dl_err("dlfb_alloc_urb_list failed\n"); |
| 1125 | goto error; |
| 1126 | } |
| 1127 | |
| 1128 | mutex_init(&dev->fb_open_lock); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1129 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1130 | /* We don't register a new USB class. Our client interface is fbdev */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1131 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1132 | /* allocates framebuffer driver structure, not framebuffer memory */ |
| 1133 | info = framebuffer_alloc(0, &usbdev->dev); |
| 1134 | if (!info) { |
| 1135 | retval = -ENOMEM; |
| 1136 | dl_err("framebuffer_alloc failed\n"); |
| 1137 | goto error; |
| 1138 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1139 | dev->info = info; |
| 1140 | info->par = dev; |
| 1141 | info->pseudo_palette = dev->pseudo_palette; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1142 | info->fbops = &dlfb_ops; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1143 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1144 | var = &info->var; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1145 | |
| 1146 | /* TODO set limit based on actual SKU detection */ |
| 1147 | dev->sku_pixel_limit = 2048 * 1152; |
| 1148 | |
| 1149 | INIT_LIST_HEAD(&info->modelist); |
| 1150 | dlfb_parse_edid(dev, var, info); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1151 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1152 | /* |
| 1153 | * ok, now that we've got the size info, we can alloc our framebuffer. |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1154 | */ |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1155 | info->fix = dlfb_fix; |
| 1156 | info->fix.line_length = var->xres * (var->bits_per_pixel / 8); |
| 1157 | videomemorysize = info->fix.line_length * var->yres; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1158 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1159 | /* |
| 1160 | * The big chunk of system memory we use as a virtual framebuffer. |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1161 | * TODO: Handle fbcon cursor code calling blit in interrupt context |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1162 | */ |
| 1163 | videomemory = vmalloc(videomemorysize); |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1164 | if (!videomemory) { |
| 1165 | retval = -ENOMEM; |
| 1166 | dl_err("Virtual framebuffer alloc failed\n"); |
| 1167 | goto error; |
| 1168 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1169 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1170 | info->screen_base = videomemory; |
| 1171 | info->fix.smem_len = PAGE_ALIGN(videomemorysize); |
| 1172 | info->fix.smem_start = (unsigned long) videomemory; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1173 | info->flags = udlfb_info_flags; |
| 1174 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1175 | |
| 1176 | /* |
| 1177 | * Second framebuffer copy, mirroring the state of the framebuffer |
| 1178 | * on the physical USB device. We can function without this. |
| 1179 | * But with imperfect damage info we may end up sending pixels over USB |
| 1180 | * that were, in fact, unchanged -- wasting limited USB bandwidth |
| 1181 | */ |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1182 | dev->backing_buffer = vmalloc(videomemorysize); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1183 | if (!dev->backing_buffer) |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1184 | dl_warn("No shadow/backing buffer allcoated\n"); |
| 1185 | else |
| 1186 | memset(dev->backing_buffer, 0, videomemorysize); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1187 | |
| 1188 | retval = fb_alloc_cmap(&info->cmap, 256, 0); |
| 1189 | if (retval < 0) { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1190 | dl_err("fb_alloc_cmap failed %x\n", retval); |
| 1191 | goto error; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1192 | } |
| 1193 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1194 | /* ready to begin using device */ |
| 1195 | |
| 1196 | /* |
| 1197 | #ifdef CONFIG_FB_DEFERRED_IO |
| 1198 | atomic_set(&dev->use_defio, 1); |
| 1199 | #endif |
| 1200 | */ |
| 1201 | atomic_set(&dev->usb_active, 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1202 | dlfb_select_std_channel(dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1203 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1204 | dlfb_ops_check_var(var, info); |
| 1205 | dlfb_ops_set_par(info); |
| 1206 | |
| 1207 | /* paint greenscreen */ |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1208 | pix_framebuffer = (u16 *) videomemory; |
| 1209 | for (i = 0; i < videomemorysize / 2; i++) |
| 1210 | pix_framebuffer[i] = 0x37e6; |
| 1211 | |
| 1212 | dlfb_handle_damage(dev, 0, 0, info->var.xres, info->var.yres, |
| 1213 | videomemory); |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame^] | 1214 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1215 | retval = register_framebuffer(info); |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1216 | if (retval < 0) { |
| 1217 | dl_err("register_framebuffer failed %d\n", retval); |
| 1218 | goto error; |
| 1219 | } |
| 1220 | registered = 1; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1221 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1222 | for (i = 0; i < ARRAY_SIZE(fb_device_attrs); i++) |
| 1223 | device_create_file(info->dev, &fb_device_attrs[i]); |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 1224 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1225 | device_create_bin_file(info->dev, &edid_attr); |
| 1226 | |
| 1227 | dl_err("DisplayLink USB device /dev/fb%d attached. %dx%d resolution." |
| 1228 | " Using %dK framebuffer memory\n", info->node, |
| 1229 | var->xres, var->yres, |
| 1230 | ((dev->backing_buffer) ? |
| 1231 | videomemorysize * 2 : videomemorysize) >> 10); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1232 | return 0; |
| 1233 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1234 | error: |
| 1235 | if (dev) { |
| 1236 | if (registered) { |
| 1237 | unregister_framebuffer(info); |
| 1238 | dlfb_ops_destroy(info); |
| 1239 | } else |
| 1240 | kref_put(&dev->kref, dlfb_delete); |
| 1241 | |
| 1242 | if (dev->urbs.count > 0) |
| 1243 | dlfb_free_urb_list(dev); |
| 1244 | kref_put(&dev->kref, dlfb_delete); /* last ref from kref_init */ |
| 1245 | |
| 1246 | /* dev has been deallocated. Do not dereference */ |
| 1247 | } |
| 1248 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1249 | return retval; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1250 | } |
| 1251 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1252 | static void dlfb_usb_disconnect(struct usb_interface *interface) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1253 | { |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1254 | struct dlfb_data *dev; |
| 1255 | struct fb_info *info; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1256 | int i; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1257 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1258 | dev = usb_get_intfdata(interface); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1259 | info = dev->info; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1260 | |
| 1261 | /* when non-active we'll update virtual framebuffer, but no new urbs */ |
| 1262 | atomic_set(&dev->usb_active, 0); |
| 1263 | |
| 1264 | usb_set_intfdata(interface, NULL); |
| 1265 | |
| 1266 | for (i = 0; i < ARRAY_SIZE(fb_device_attrs); i++) |
| 1267 | device_remove_file(info->dev, &fb_device_attrs[i]); |
| 1268 | |
| 1269 | device_remove_bin_file(info->dev, &edid_attr); |
| 1270 | |
| 1271 | /* this function will wait for all in-flight urbs to complete */ |
| 1272 | dlfb_free_urb_list(dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1273 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1274 | if (info) { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1275 | dl_notice("Detaching /dev/fb%d\n", info->node); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1276 | unregister_framebuffer(info); |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1277 | dlfb_ops_destroy(info); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1278 | } |
| 1279 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1280 | /* release reference taken by kref_init in probe() */ |
| 1281 | kref_put(&dev->kref, dlfb_delete); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1282 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1283 | /* consider dlfb_data freed */ |
| 1284 | |
| 1285 | return; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1286 | } |
| 1287 | |
| 1288 | static struct usb_driver dlfb_driver = { |
| 1289 | .name = "udlfb", |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1290 | .probe = dlfb_usb_probe, |
| 1291 | .disconnect = dlfb_usb_disconnect, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1292 | .id_table = id_table, |
| 1293 | }; |
| 1294 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1295 | static int __init dlfb_module_init(void) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1296 | { |
| 1297 | int res; |
| 1298 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1299 | res = usb_register(&dlfb_driver); |
| 1300 | if (res) |
| 1301 | err("usb_register failed. Error number %d", res); |
| 1302 | |
| 1303 | printk("VMODES initialized\n"); |
| 1304 | |
| 1305 | return res; |
| 1306 | } |
| 1307 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1308 | static void __exit dlfb_module_exit(void) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1309 | { |
| 1310 | usb_deregister(&dlfb_driver); |
| 1311 | } |
| 1312 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1313 | module_init(dlfb_module_init); |
| 1314 | module_exit(dlfb_module_exit); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1315 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1316 | static void dlfb_urb_completion(struct urb *urb) |
| 1317 | { |
| 1318 | struct urb_node *unode = urb->context; |
| 1319 | struct dlfb_data *dev = unode->dev; |
| 1320 | unsigned long flags; |
| 1321 | |
| 1322 | /* sync/async unlink faults aren't errors */ |
| 1323 | if (urb->status) { |
| 1324 | if (!(urb->status == -ENOENT || |
| 1325 | urb->status == -ECONNRESET || |
| 1326 | urb->status == -ESHUTDOWN)) { |
| 1327 | dl_err("%s - nonzero write bulk status received: %d\n", |
| 1328 | __func__, urb->status); |
| 1329 | atomic_set(&dev->lost_pixels, 1); |
| 1330 | } |
| 1331 | } |
| 1332 | |
| 1333 | urb->transfer_buffer_length = dev->urbs.size; /* reset to actual */ |
| 1334 | |
| 1335 | spin_lock_irqsave(&dev->urbs.lock, flags); |
| 1336 | list_add_tail(&unode->entry, &dev->urbs.list); |
| 1337 | dev->urbs.available++; |
| 1338 | spin_unlock_irqrestore(&dev->urbs.lock, flags); |
| 1339 | |
| 1340 | up(&dev->urbs.limit_sem); |
| 1341 | } |
| 1342 | |
| 1343 | static void dlfb_free_urb_list(struct dlfb_data *dev) |
| 1344 | { |
| 1345 | int count = dev->urbs.count; |
| 1346 | struct list_head *node; |
| 1347 | struct urb_node *unode; |
| 1348 | struct urb *urb; |
| 1349 | int ret; |
| 1350 | unsigned long flags; |
| 1351 | |
| 1352 | dl_notice("Waiting for completes and freeing all render urbs\n"); |
| 1353 | |
| 1354 | /* keep waiting and freeing, until we've got 'em all */ |
| 1355 | while (count--) { |
| 1356 | /* Timeout means a memory leak and/or fault */ |
| 1357 | ret = down_timeout(&dev->urbs.limit_sem, FREE_URB_TIMEOUT); |
| 1358 | if (ret) { |
| 1359 | BUG_ON(ret); |
| 1360 | break; |
| 1361 | } |
| 1362 | spin_lock_irqsave(&dev->urbs.lock, flags); |
| 1363 | |
| 1364 | node = dev->urbs.list.next; /* have reserved one with sem */ |
| 1365 | list_del_init(node); |
| 1366 | |
| 1367 | spin_unlock_irqrestore(&dev->urbs.lock, flags); |
| 1368 | |
| 1369 | unode = list_entry(node, struct urb_node, entry); |
| 1370 | urb = unode->urb; |
| 1371 | |
| 1372 | /* Free each separately allocated piece */ |
| 1373 | usb_buffer_free(urb->dev, dev->urbs.size, |
| 1374 | urb->transfer_buffer, urb->transfer_dma); |
| 1375 | usb_free_urb(urb); |
| 1376 | kfree(node); |
| 1377 | } |
| 1378 | |
| 1379 | kref_put(&dev->kref, dlfb_delete); |
| 1380 | |
| 1381 | } |
| 1382 | |
| 1383 | static int dlfb_alloc_urb_list(struct dlfb_data *dev, int count, size_t size) |
| 1384 | { |
| 1385 | int i = 0; |
| 1386 | struct urb *urb; |
| 1387 | struct urb_node *unode; |
| 1388 | char *buf; |
| 1389 | |
| 1390 | spin_lock_init(&dev->urbs.lock); |
| 1391 | |
| 1392 | dev->urbs.size = size; |
| 1393 | INIT_LIST_HEAD(&dev->urbs.list); |
| 1394 | |
| 1395 | while (i < count) { |
| 1396 | unode = kzalloc(sizeof(struct urb_node), GFP_KERNEL); |
| 1397 | if (!unode) |
| 1398 | break; |
| 1399 | unode->dev = dev; |
| 1400 | |
| 1401 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1402 | if (!urb) { |
| 1403 | kfree(unode); |
| 1404 | break; |
| 1405 | } |
| 1406 | unode->urb = urb; |
| 1407 | |
| 1408 | buf = usb_buffer_alloc(dev->udev, MAX_TRANSFER, GFP_KERNEL, |
| 1409 | &urb->transfer_dma); |
| 1410 | if (!buf) { |
| 1411 | kfree(unode); |
| 1412 | usb_free_urb(urb); |
| 1413 | break; |
| 1414 | } |
| 1415 | |
| 1416 | /* urb->transfer_buffer_length set to actual before submit */ |
| 1417 | usb_fill_bulk_urb(urb, dev->udev, usb_sndbulkpipe(dev->udev, 1), |
| 1418 | buf, size, dlfb_urb_completion, unode); |
| 1419 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 1420 | |
| 1421 | list_add_tail(&unode->entry, &dev->urbs.list); |
| 1422 | |
| 1423 | i++; |
| 1424 | } |
| 1425 | |
| 1426 | sema_init(&dev->urbs.limit_sem, i); |
| 1427 | dev->urbs.count = i; |
| 1428 | dev->urbs.available = i; |
| 1429 | |
| 1430 | kref_get(&dev->kref); /* released in free_render_urbs() */ |
| 1431 | |
| 1432 | dl_notice("allocated %d %d byte urbs \n", i, (int) size); |
| 1433 | |
| 1434 | return i; |
| 1435 | } |
| 1436 | |
| 1437 | static struct urb *dlfb_get_urb(struct dlfb_data *dev) |
| 1438 | { |
| 1439 | int ret = 0; |
| 1440 | struct list_head *entry; |
| 1441 | struct urb_node *unode; |
| 1442 | struct urb *urb = NULL; |
| 1443 | unsigned long flags; |
| 1444 | |
| 1445 | /* Wait for an in-flight buffer to complete and get re-queued */ |
| 1446 | ret = down_timeout(&dev->urbs.limit_sem, GET_URB_TIMEOUT); |
| 1447 | if (ret) { |
| 1448 | atomic_set(&dev->lost_pixels, 1); |
| 1449 | dl_err("wait for urb interrupted: %x\n", ret); |
| 1450 | goto error; |
| 1451 | } |
| 1452 | |
| 1453 | spin_lock_irqsave(&dev->urbs.lock, flags); |
| 1454 | |
| 1455 | BUG_ON(list_empty(&dev->urbs.list)); /* reserved one with limit_sem */ |
| 1456 | entry = dev->urbs.list.next; |
| 1457 | list_del_init(entry); |
| 1458 | dev->urbs.available--; |
| 1459 | |
| 1460 | spin_unlock_irqrestore(&dev->urbs.lock, flags); |
| 1461 | |
| 1462 | unode = list_entry(entry, struct urb_node, entry); |
| 1463 | urb = unode->urb; |
| 1464 | |
| 1465 | error: |
| 1466 | return urb; |
| 1467 | } |
| 1468 | |
| 1469 | static int dlfb_submit_urb(struct dlfb_data *dev, struct urb *urb, size_t len) |
| 1470 | { |
| 1471 | int ret; |
| 1472 | |
| 1473 | BUG_ON(len > dev->urbs.size); |
| 1474 | |
| 1475 | urb->transfer_buffer_length = len; /* set to actual payload len */ |
| 1476 | ret = usb_submit_urb(urb, GFP_KERNEL); |
| 1477 | if (ret) { |
| 1478 | dlfb_urb_completion(urb); /* because no one else will */ |
| 1479 | atomic_set(&dev->lost_pixels, 1); |
| 1480 | dl_err("usb_submit_urb error %x\n", ret); |
| 1481 | } |
| 1482 | return ret; |
| 1483 | } |
| 1484 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1485 | MODULE_AUTHOR("Roberto De Ioris <roberto@unbit.it>, " |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1486 | "Jaya Kumar <jayakumar.lkml@gmail.com>, " |
| 1487 | "Bernie Thompson <bernie@plugable.com>"); |
| 1488 | MODULE_DESCRIPTION("DisplayLink kernel framebuffer driver"); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1489 | MODULE_LICENSE("GPL"); |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1490 | |