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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 28 | #include <linux/delay.h> |
| 29 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 30 | |
| 31 | #include "udlfb.h" |
| 32 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 33 | static struct fb_fix_screeninfo dlfb_fix = { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 34 | .id = "udlfb", |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 35 | .type = FB_TYPE_PACKED_PIXELS, |
| 36 | .visual = FB_VISUAL_TRUECOLOR, |
| 37 | .xpanstep = 0, |
| 38 | .ypanstep = 0, |
| 39 | .ywrapstep = 0, |
| 40 | .accel = FB_ACCEL_NONE, |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 41 | }; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 42 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 43 | static const u32 udlfb_info_flags = FBINFO_DEFAULT | FBINFO_READS_FAST | |
| 44 | #ifdef FBINFO_VIRTFB |
| 45 | FBINFO_VIRTFB | |
| 46 | #endif |
| 47 | FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_FILLRECT | |
| 48 | FBINFO_HWACCEL_COPYAREA | FBINFO_MISC_ALWAYS_SETPAR; |
| 49 | |
Bernie Thompson | cc403dc | 2010-02-15 06:45:49 -0800 | [diff] [blame] | 50 | /* |
| 51 | * There are many DisplayLink-based products, all with unique PIDs. We are able |
| 52 | * to support all volume ones (circa 2009) with a single driver, so we match |
| 53 | * globally on VID. TODO: Probe() needs to detect when we might be running |
| 54 | * "future" chips, and bail on those, so a compatible driver can match. |
| 55 | */ |
| 56 | static struct usb_device_id id_table[] = { |
| 57 | {.idVendor = 0x17e9, .match_flags = USB_DEVICE_ID_MATCH_VENDOR,}, |
| 58 | {}, |
| 59 | }; |
| 60 | MODULE_DEVICE_TABLE(usb, id_table); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 61 | |
Bernie Thompson | dd8015f | 2010-02-15 06:46:35 -0800 | [diff] [blame] | 62 | #ifndef CONFIG_FB_DEFERRED_IO |
Pavel Machek | 3b7b31f | 2010-04-03 07:00:37 +0200 | [diff] [blame] | 63 | #warning Please set CONFIG_FB_DEFFERRED_IO option to support generic fbdev apps |
Bernie Thompson | dd8015f | 2010-02-15 06:46:35 -0800 | [diff] [blame] | 64 | #endif |
| 65 | |
| 66 | #ifndef CONFIG_FB_SYS_IMAGEBLIT |
| 67 | #ifndef CONFIG_FB_SYS_IMAGEBLIT_MODULE |
Pavel Machek | 3b7b31f | 2010-04-03 07:00:37 +0200 | [diff] [blame] | 68 | #warning Please set CONFIG_FB_SYS_IMAGEBLIT option to support fb console |
Bernie Thompson | dd8015f | 2010-02-15 06:46:35 -0800 | [diff] [blame] | 69 | #endif |
| 70 | #endif |
| 71 | |
| 72 | #ifndef CONFIG_FB_MODE_HELPERS |
Pavel Machek | 3b7b31f | 2010-04-03 07:00:37 +0200 | [diff] [blame] | 73 | #warning CONFIG_FB_MODE_HELPERS required. Expect build break |
Bernie Thompson | dd8015f | 2010-02-15 06:46:35 -0800 | [diff] [blame] | 74 | #endif |
| 75 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 76 | /* dlfb keeps a list of urbs for efficient bulk transfers */ |
| 77 | static void dlfb_urb_completion(struct urb *urb); |
| 78 | static struct urb *dlfb_get_urb(struct dlfb_data *dev); |
| 79 | static int dlfb_submit_urb(struct dlfb_data *dev, struct urb * urb, size_t len); |
| 80 | static int dlfb_alloc_urb_list(struct dlfb_data *dev, int count, size_t size); |
| 81 | static void dlfb_free_urb_list(struct dlfb_data *dev); |
| 82 | |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 83 | /* other symbols with dependents */ |
| 84 | #ifdef CONFIG_FB_DEFERRED_IO |
| 85 | static struct fb_deferred_io dlfb_defio; |
| 86 | #endif |
| 87 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 88 | /* |
Bernie Thompson | bd80816 | 2010-02-15 06:46:48 -0800 | [diff] [blame] | 89 | * All DisplayLink bulk operations start with 0xAF, followed by specific code |
| 90 | * All operations are written to buffers which then later get sent to device |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 91 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 92 | static char *dlfb_set_register(char *buf, u8 reg, u8 val) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 93 | { |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 94 | *buf++ = 0xAF; |
| 95 | *buf++ = 0x20; |
| 96 | *buf++ = reg; |
| 97 | *buf++ = val; |
| 98 | return buf; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 99 | } |
| 100 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 101 | static char *dlfb_vidreg_lock(char *buf) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 102 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 103 | return dlfb_set_register(buf, 0xFF, 0x00); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 104 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 105 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 106 | static char *dlfb_vidreg_unlock(char *buf) |
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 | return dlfb_set_register(buf, 0xFF, 0xFF); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 109 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 110 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 111 | /* |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 112 | * On/Off for driving the DisplayLink framebuffer to the display |
Bernie Thompson | 9825f70 | 2010-09-05 16:35:10 -0700 | [diff] [blame] | 113 | * 0x00 H and V sync on |
| 114 | * 0x01 H and V sync off (screen blank but powered) |
| 115 | * 0x07 DPMS powerdown (requires modeset to come back) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 116 | */ |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 117 | static char *dlfb_enable_hvsync(char *buf, bool enable) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 118 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 119 | if (enable) |
| 120 | return dlfb_set_register(buf, 0x1F, 0x00); |
| 121 | else |
Bernie Thompson | 9825f70 | 2010-09-05 16:35:10 -0700 | [diff] [blame] | 122 | return dlfb_set_register(buf, 0x1F, 0x07); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 123 | } |
| 124 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 125 | static char *dlfb_set_color_depth(char *buf, u8 selection) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 126 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 127 | return dlfb_set_register(buf, 0x00, selection); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 128 | } |
| 129 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 130 | static char *dlfb_set_base16bpp(char *wrptr, u32 base) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 131 | { |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 132 | /* the base pointer is 16 bits wide, 0x20 is hi byte. */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 133 | wrptr = dlfb_set_register(wrptr, 0x20, base >> 16); |
| 134 | wrptr = dlfb_set_register(wrptr, 0x21, base >> 8); |
| 135 | return dlfb_set_register(wrptr, 0x22, base); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 136 | } |
| 137 | |
Bernie Thompson | bd80816 | 2010-02-15 06:46:48 -0800 | [diff] [blame] | 138 | /* |
| 139 | * DisplayLink HW has separate 16bpp and 8bpp framebuffers. |
| 140 | * In 24bpp modes, the low 323 RGB bits go in the 8bpp framebuffer |
| 141 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 142 | static char *dlfb_set_base8bpp(char *wrptr, u32 base) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 143 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 144 | wrptr = dlfb_set_register(wrptr, 0x26, base >> 16); |
| 145 | wrptr = dlfb_set_register(wrptr, 0x27, base >> 8); |
| 146 | return dlfb_set_register(wrptr, 0x28, base); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 147 | } |
| 148 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 149 | static char *dlfb_set_register_16(char *wrptr, u8 reg, u16 value) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 150 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 151 | wrptr = dlfb_set_register(wrptr, reg, value >> 8); |
| 152 | return dlfb_set_register(wrptr, reg+1, value); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | /* |
| 156 | * This is kind of weird because the controller takes some |
| 157 | * register values in a different byte order than other registers. |
| 158 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 159 | static char *dlfb_set_register_16be(char *wrptr, u8 reg, u16 value) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 160 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 161 | wrptr = dlfb_set_register(wrptr, reg, value); |
| 162 | return dlfb_set_register(wrptr, reg+1, value >> 8); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | /* |
| 166 | * LFSR is linear feedback shift register. The reason we have this is |
| 167 | * because the display controller needs to minimize the clock depth of |
| 168 | * various counters used in the display path. So this code reverses the |
| 169 | * provided value into the lfsr16 value by counting backwards to get |
| 170 | * the value that needs to be set in the hardware comparator to get the |
| 171 | * same actual count. This makes sense once you read above a couple of |
| 172 | * times and think about it from a hardware perspective. |
| 173 | */ |
Bernie Thompson | bd80816 | 2010-02-15 06:46:48 -0800 | [diff] [blame] | 174 | static u16 dlfb_lfsr16(u16 actual_count) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 175 | { |
| 176 | u32 lv = 0xFFFF; /* This is the lfsr value that the hw starts with */ |
| 177 | |
| 178 | while (actual_count--) { |
| 179 | lv = ((lv << 1) | |
| 180 | (((lv >> 15) ^ (lv >> 4) ^ (lv >> 2) ^ (lv >> 1)) & 1)) |
| 181 | & 0xFFFF; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 182 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 183 | |
| 184 | return (u16) lv; |
| 185 | } |
| 186 | |
| 187 | /* |
| 188 | * This does LFSR conversion on the value that is to be written. |
| 189 | * See LFSR explanation above for more detail. |
| 190 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 191 | static char *dlfb_set_register_lfsr16(char *wrptr, u8 reg, u16 value) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 192 | { |
Bernie Thompson | bd80816 | 2010-02-15 06:46:48 -0800 | [diff] [blame] | 193 | return dlfb_set_register_16(wrptr, reg, dlfb_lfsr16(value)); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 194 | } |
| 195 | |
| 196 | /* |
| 197 | * This takes a standard fbdev screeninfo struct and all of its monitor mode |
| 198 | * details and converts them into the DisplayLink equivalent register commands. |
| 199 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 200 | 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] | 201 | { |
| 202 | u16 xds, yds; |
| 203 | u16 xde, yde; |
| 204 | u16 yec; |
| 205 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 206 | /* x display start */ |
| 207 | xds = var->left_margin + var->hsync_len; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 208 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x01, xds); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 209 | /* x display end */ |
| 210 | xde = xds + var->xres; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 211 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x03, xde); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 212 | |
| 213 | /* y display start */ |
| 214 | yds = var->upper_margin + var->vsync_len; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 215 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x05, yds); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 216 | /* y display end */ |
| 217 | yde = yds + var->yres; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 218 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x07, yde); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 219 | |
| 220 | /* x end count is active + blanking - 1 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 221 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x09, |
| 222 | xde + var->right_margin - 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 223 | |
| 224 | /* libdlo hardcodes hsync start to 1 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 225 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x0B, 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 226 | |
| 227 | /* hsync end is width of sync pulse + 1 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 228 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x0D, var->hsync_len + 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 229 | |
| 230 | /* hpixels is active pixels */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 231 | wrptr = dlfb_set_register_16(wrptr, 0x0F, var->xres); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 232 | |
| 233 | /* yendcount is vertical active + vertical blanking */ |
| 234 | yec = var->yres + var->upper_margin + var->lower_margin + |
| 235 | var->vsync_len; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 236 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x11, yec); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 237 | |
| 238 | /* libdlo hardcodes vsync start to 0 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 239 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x13, 0); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 240 | |
| 241 | /* vsync end is width of vsync pulse */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 242 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x15, var->vsync_len); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 243 | |
| 244 | /* vpixels is active pixels */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 245 | wrptr = dlfb_set_register_16(wrptr, 0x17, var->yres); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 246 | |
| 247 | /* convert picoseconds to 5kHz multiple for pclk5k = x * 1E12/5k */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 248 | wrptr = dlfb_set_register_16be(wrptr, 0x1B, |
| 249 | 200*1000*1000/var->pixclock); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 250 | |
| 251 | return wrptr; |
| 252 | } |
| 253 | |
| 254 | /* |
| 255 | * This takes a standard fbdev screeninfo struct that was fetched or prepared |
| 256 | * and then generates the appropriate command sequence that then drives the |
| 257 | * display controller. |
| 258 | */ |
| 259 | static int dlfb_set_video_mode(struct dlfb_data *dev, |
| 260 | struct fb_var_screeninfo *var) |
| 261 | { |
| 262 | char *buf; |
| 263 | char *wrptr; |
| 264 | int retval = 0; |
| 265 | int writesize; |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 266 | struct urb *urb; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 267 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 268 | if (!atomic_read(&dev->usb_active)) |
| 269 | return -EPERM; |
| 270 | |
| 271 | urb = dlfb_get_urb(dev); |
| 272 | if (!urb) |
| 273 | return -ENOMEM; |
| 274 | buf = (char *) urb->transfer_buffer; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 275 | |
| 276 | /* |
| 277 | * This first section has to do with setting the base address on the |
| 278 | * controller * associated with the display. There are 2 base |
| 279 | * pointers, currently, we only * use the 16 bpp segment. |
| 280 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 281 | wrptr = dlfb_vidreg_lock(buf); |
| 282 | wrptr = dlfb_set_color_depth(wrptr, 0x00); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 283 | /* set base for 16bpp segment to 0 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 284 | wrptr = dlfb_set_base16bpp(wrptr, 0); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 285 | /* set base for 8bpp segment to end of fb */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 286 | wrptr = dlfb_set_base8bpp(wrptr, dev->info->fix.smem_len); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 287 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 288 | wrptr = dlfb_set_vid_cmds(wrptr, var); |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 289 | wrptr = dlfb_enable_hvsync(wrptr, true); |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 290 | wrptr = dlfb_vidreg_unlock(wrptr); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 291 | |
| 292 | writesize = wrptr - buf; |
| 293 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 294 | retval = dlfb_submit_urb(dev, urb, writesize); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 295 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 296 | return retval; |
| 297 | } |
| 298 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 299 | 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] | 300 | { |
| 301 | unsigned long start = vma->vm_start; |
| 302 | unsigned long size = vma->vm_end - vma->vm_start; |
| 303 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; |
| 304 | unsigned long page, pos; |
| 305 | |
Bernie Thompson | bd80816 | 2010-02-15 06:46:48 -0800 | [diff] [blame] | 306 | dl_notice("MMAP: %lu %u\n", offset + size, info->fix.smem_len); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 307 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 308 | if (offset + size > info->fix.smem_len) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 309 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 310 | |
| 311 | pos = (unsigned long)info->fix.smem_start + offset; |
| 312 | |
| 313 | while (size > 0) { |
| 314 | page = vmalloc_to_pfn((void *)pos); |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 315 | if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 316 | return -EAGAIN; |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 317 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 318 | start += PAGE_SIZE; |
| 319 | pos += PAGE_SIZE; |
| 320 | if (size > PAGE_SIZE) |
| 321 | size -= PAGE_SIZE; |
| 322 | else |
| 323 | size = 0; |
| 324 | } |
| 325 | |
| 326 | vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ |
| 327 | return 0; |
| 328 | |
| 329 | } |
| 330 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 331 | /* |
| 332 | * Trims identical data from front and back of line |
| 333 | * Sets new front buffer address and width |
| 334 | * And returns byte count of identical pixels |
| 335 | * Assumes CPU natural alignment (unsigned long) |
| 336 | * for back and front buffer ptrs and width |
| 337 | */ |
| 338 | 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] | 339 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 340 | int j, k; |
| 341 | const unsigned long *back = (const unsigned long *) bback; |
| 342 | const unsigned long *front = (const unsigned long *) *bfront; |
| 343 | const int width = *width_bytes / sizeof(unsigned long); |
| 344 | int identical = width; |
| 345 | int start = width; |
| 346 | int end = width; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 347 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 348 | prefetch((void *) front); |
| 349 | prefetch((void *) back); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 350 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 351 | for (j = 0; j < width; j++) { |
| 352 | if (back[j] != front[j]) { |
| 353 | start = j; |
| 354 | break; |
| 355 | } |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 356 | } |
| 357 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 358 | for (k = width - 1; k > j; k--) { |
| 359 | if (back[k] != front[k]) { |
| 360 | end = k+1; |
| 361 | break; |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | identical = start + (width - end); |
| 366 | *bfront = (u8 *) &front[start]; |
| 367 | *width_bytes = (end - start) * sizeof(unsigned long); |
| 368 | |
| 369 | return identical * sizeof(unsigned long); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 370 | } |
| 371 | |
| 372 | /* |
Pavel Machek | 3b7b31f | 2010-04-03 07:00:37 +0200 | [diff] [blame] | 373 | * Render a command stream for an encoded horizontal line segment of pixels. |
| 374 | * |
| 375 | * A command buffer holds several commands. |
| 376 | * It always begins with a fresh command header |
| 377 | * (the protocol doesn't require this, but we enforce it to allow |
| 378 | * multiple buffers to be potentially encoded and sent in parallel). |
| 379 | * A single command encodes one contiguous horizontal line of pixels |
| 380 | * |
| 381 | * The function relies on the client to do all allocation, so that |
| 382 | * rendering can be done directly to output buffers (e.g. USB URBs). |
| 383 | * The function fills the supplied command buffer, providing information |
| 384 | * on where it left off, so the client may call in again with additional |
| 385 | * buffers if the line will take several buffers to complete. |
| 386 | * |
| 387 | * A single command can transmit a maximum of 256 pixels, |
| 388 | * regardless of the compression ratio (protocol design limit). |
| 389 | * To the hardware, 0 for a size byte means 256 |
| 390 | * |
| 391 | * Rather than 256 pixel commands which are either rl or raw encoded, |
| 392 | * the rlx command simply assumes alternating raw and rl spans within one cmd. |
| 393 | * This has a slightly larger header overhead, but produces more even results. |
| 394 | * It also processes all data (read and write) in a single pass. |
| 395 | * Performance benchmarks of common cases show it having just slightly better |
| 396 | * compression than 256 pixel raw -or- rle commands, with similar CPU consumpion. |
| 397 | * But for very rl friendly data, will compress not quite as well. |
| 398 | */ |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 399 | static void dlfb_compress_hline( |
| 400 | const uint16_t **pixel_start_ptr, |
| 401 | const uint16_t *const pixel_end, |
| 402 | uint32_t *device_address_ptr, |
| 403 | uint8_t **command_buffer_ptr, |
| 404 | const uint8_t *const cmd_buffer_end) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 405 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 406 | const uint16_t *pixel = *pixel_start_ptr; |
| 407 | uint32_t dev_addr = *device_address_ptr; |
| 408 | uint8_t *cmd = *command_buffer_ptr; |
| 409 | const int bpp = 2; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 410 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 411 | while ((pixel_end > pixel) && |
| 412 | (cmd_buffer_end - MIN_RLX_CMD_BYTES > cmd)) { |
| 413 | uint8_t *raw_pixels_count_byte = 0; |
| 414 | uint8_t *cmd_pixels_count_byte = 0; |
| 415 | const uint16_t *raw_pixel_start = 0; |
| 416 | const uint16_t *cmd_pixel_start, *cmd_pixel_end = 0; |
| 417 | const uint32_t be_dev_addr = cpu_to_be32(dev_addr); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 418 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 419 | prefetchw((void *) cmd); /* pull in one cache line at least */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 420 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 421 | *cmd++ = 0xAF; |
| 422 | *cmd++ = 0x6B; |
| 423 | *cmd++ = (uint8_t) ((be_dev_addr >> 8) & 0xFF); |
| 424 | *cmd++ = (uint8_t) ((be_dev_addr >> 16) & 0xFF); |
| 425 | *cmd++ = (uint8_t) ((be_dev_addr >> 24) & 0xFF); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 426 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 427 | cmd_pixels_count_byte = cmd++; /* we'll know this later */ |
| 428 | cmd_pixel_start = pixel; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 429 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 430 | raw_pixels_count_byte = cmd++; /* we'll know this later */ |
| 431 | raw_pixel_start = pixel; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 432 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 433 | cmd_pixel_end = pixel + min(MAX_CMD_PIXELS + 1, |
| 434 | min((int)(pixel_end - pixel), |
| 435 | (int)(cmd_buffer_end - cmd) / bpp)); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 436 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 437 | prefetch_range((void *) pixel, (cmd_pixel_end - pixel) * bpp); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 438 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 439 | while (pixel < cmd_pixel_end) { |
| 440 | const uint16_t * const repeating_pixel = pixel; |
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 | *(uint16_t *)cmd = cpu_to_be16p(pixel); |
| 443 | cmd += 2; |
| 444 | pixel++; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 445 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 446 | if (unlikely((pixel < cmd_pixel_end) && |
| 447 | (*pixel == *repeating_pixel))) { |
| 448 | /* go back and fill in raw pixel count */ |
| 449 | *raw_pixels_count_byte = ((repeating_pixel - |
| 450 | raw_pixel_start) + 1) & 0xFF; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 451 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 452 | while ((pixel < cmd_pixel_end) |
| 453 | && (*pixel == *repeating_pixel)) { |
| 454 | pixel++; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 455 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 456 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 457 | /* immediately after raw data is repeat byte */ |
| 458 | *cmd++ = ((pixel - repeating_pixel) - 1) & 0xFF; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 459 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 460 | /* Then start another raw pixel span */ |
| 461 | raw_pixel_start = pixel; |
| 462 | raw_pixels_count_byte = cmd++; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 463 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 464 | } |
| 465 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 466 | if (pixel > raw_pixel_start) { |
| 467 | /* finalize last RAW span */ |
| 468 | *raw_pixels_count_byte = (pixel-raw_pixel_start) & 0xFF; |
| 469 | } |
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 | *cmd_pixels_count_byte = (pixel - cmd_pixel_start) & 0xFF; |
| 472 | dev_addr += (pixel - cmd_pixel_start) * bpp; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 473 | } |
| 474 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 475 | if (cmd_buffer_end <= MIN_RLX_CMD_BYTES + cmd) { |
| 476 | /* Fill leftover bytes with no-ops */ |
| 477 | if (cmd_buffer_end > cmd) |
| 478 | memset(cmd, 0xAF, cmd_buffer_end - cmd); |
| 479 | cmd = (uint8_t *) cmd_buffer_end; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 480 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 481 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 482 | *command_buffer_ptr = cmd; |
| 483 | *pixel_start_ptr = pixel; |
| 484 | *device_address_ptr = dev_addr; |
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 | return; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 487 | } |
| 488 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 489 | /* |
| 490 | * There are 3 copies of every pixel: The front buffer that the fbdev |
| 491 | * client renders to, the actual framebuffer across the USB bus in hardware |
| 492 | * (that we can only write to, slowly, and can never read), and (optionally) |
| 493 | * our shadow copy that tracks what's been sent to that hardware buffer. |
| 494 | */ |
| 495 | static void dlfb_render_hline(struct dlfb_data *dev, struct urb **urb_ptr, |
| 496 | const char *front, char **urb_buf_ptr, |
| 497 | u32 byte_offset, u32 byte_width, |
| 498 | int *ident_ptr, int *sent_ptr) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 499 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 500 | const u8 *line_start, *line_end, *next_pixel; |
| 501 | u32 dev_addr = dev->base16 + byte_offset; |
| 502 | struct urb *urb = *urb_ptr; |
| 503 | u8 *cmd = *urb_buf_ptr; |
| 504 | u8 *cmd_end = (u8 *) urb->transfer_buffer + urb->transfer_buffer_length; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 505 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 506 | line_start = (u8 *) (front + byte_offset); |
| 507 | next_pixel = line_start; |
| 508 | line_end = next_pixel + byte_width; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 509 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 510 | if (dev->backing_buffer) { |
| 511 | int offset; |
| 512 | const u8 *back_start = (u8 *) (dev->backing_buffer |
| 513 | + byte_offset); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 514 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 515 | *ident_ptr += dlfb_trim_hline(back_start, &next_pixel, |
| 516 | &byte_width); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 517 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 518 | offset = next_pixel - line_start; |
| 519 | line_end = next_pixel + byte_width; |
| 520 | dev_addr += offset; |
| 521 | back_start += offset; |
| 522 | line_start += offset; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 523 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 524 | memcpy((char *)back_start, (char *) line_start, |
| 525 | byte_width); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 526 | } |
| 527 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 528 | while (next_pixel < line_end) { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 529 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 530 | dlfb_compress_hline((const uint16_t **) &next_pixel, |
| 531 | (const uint16_t *) line_end, &dev_addr, |
| 532 | (u8 **) &cmd, (u8 *) cmd_end); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 533 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 534 | if (cmd >= cmd_end) { |
| 535 | int len = cmd - (u8 *) urb->transfer_buffer; |
| 536 | if (dlfb_submit_urb(dev, urb, len)) |
| 537 | return; /* lost pixels is set */ |
| 538 | *sent_ptr += len; |
| 539 | urb = dlfb_get_urb(dev); |
| 540 | if (!urb) |
| 541 | return; /* lost_pixels is set */ |
| 542 | *urb_ptr = urb; |
| 543 | cmd = urb->transfer_buffer; |
| 544 | cmd_end = &cmd[urb->transfer_buffer_length]; |
| 545 | } |
| 546 | } |
| 547 | |
| 548 | *urb_buf_ptr = cmd; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 549 | } |
| 550 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 551 | int dlfb_handle_damage(struct dlfb_data *dev, int x, int y, |
| 552 | int width, int height, char *data) |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 553 | { |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 554 | int i, ret; |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 555 | char *cmd; |
| 556 | cycles_t start_cycles, end_cycles; |
| 557 | int bytes_sent = 0; |
| 558 | int bytes_identical = 0; |
| 559 | struct urb *urb; |
| 560 | int aligned_x; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 561 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 562 | start_cycles = get_cycles(); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 563 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 564 | aligned_x = DL_ALIGN_DOWN(x, sizeof(unsigned long)); |
| 565 | width = DL_ALIGN_UP(width + (x-aligned_x), sizeof(unsigned long)); |
| 566 | x = aligned_x; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 567 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 568 | if ((width <= 0) || |
| 569 | (x + width > dev->info->var.xres) || |
| 570 | (y + height > dev->info->var.yres)) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 571 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 572 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 573 | if (!atomic_read(&dev->usb_active)) |
| 574 | return 0; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 575 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 576 | urb = dlfb_get_urb(dev); |
| 577 | if (!urb) |
| 578 | return 0; |
| 579 | cmd = urb->transfer_buffer; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 580 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 581 | for (i = y; i < y + height ; i++) { |
| 582 | const int line_offset = dev->info->fix.line_length * i; |
| 583 | const int byte_offset = line_offset + (x * BPP); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 584 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 585 | dlfb_render_hline(dev, &urb, (char *) dev->info->fix.smem_start, |
| 586 | &cmd, byte_offset, width * BPP, |
| 587 | &bytes_identical, &bytes_sent); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 588 | } |
| 589 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 590 | if (cmd > (char *) urb->transfer_buffer) { |
| 591 | /* Send partial buffer remaining before exiting */ |
| 592 | int len = cmd - (char *) urb->transfer_buffer; |
| 593 | ret = dlfb_submit_urb(dev, urb, len); |
| 594 | bytes_sent += len; |
| 595 | } else |
| 596 | dlfb_urb_completion(urb); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 597 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 598 | atomic_add(bytes_sent, &dev->bytes_sent); |
| 599 | atomic_add(bytes_identical, &dev->bytes_identical); |
| 600 | atomic_add(width*height*2, &dev->bytes_rendered); |
| 601 | end_cycles = get_cycles(); |
| 602 | atomic_add(((unsigned int) ((end_cycles - start_cycles) |
| 603 | >> 10)), /* Kcycles */ |
| 604 | &dev->cpu_kcycles_used); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 605 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 606 | return 0; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 607 | } |
| 608 | |
Bernie Thompson | d46ecb9 | 2010-09-05 16:35:04 -0700 | [diff] [blame] | 609 | static ssize_t dlfb_ops_read(struct fb_info *info, char __user *buf, |
| 610 | size_t count, loff_t *ppos) |
| 611 | { |
| 612 | ssize_t result = -ENOSYS; |
| 613 | |
| 614 | #if defined CONFIG_FB_SYS_FOPS || defined CONFIG_FB_SYS_FOPS_MODULE |
| 615 | result = fb_sys_read(info, buf, count, ppos); |
| 616 | #endif |
| 617 | |
| 618 | return result; |
| 619 | } |
| 620 | |
| 621 | /* |
| 622 | * Path triggered by usermode clients who write to filesystem |
| 623 | * e.g. cat filename > /dev/fb1 |
| 624 | * Not used by X Windows or text-mode console. But useful for testing. |
| 625 | * Slow because of extra copy and we must assume all pixels dirty. |
| 626 | */ |
| 627 | static ssize_t dlfb_ops_write(struct fb_info *info, const char __user *buf, |
| 628 | size_t count, loff_t *ppos) |
| 629 | { |
| 630 | ssize_t result = -ENOSYS; |
| 631 | struct dlfb_data *dev = info->par; |
| 632 | u32 offset = (u32) *ppos; |
| 633 | |
| 634 | #if defined CONFIG_FB_SYS_FOPS || defined CONFIG_FB_SYS_FOPS_MODULE |
| 635 | |
| 636 | result = fb_sys_write(info, buf, count, ppos); |
| 637 | |
| 638 | if (result > 0) { |
| 639 | int start = max((int)(offset / info->fix.line_length) - 1, 0); |
| 640 | int lines = min((u32)((result / info->fix.line_length) + 1), |
| 641 | (u32)info->var.yres); |
| 642 | |
| 643 | dlfb_handle_damage(dev, 0, start, info->var.xres, |
| 644 | lines, info->screen_base); |
| 645 | } |
| 646 | #endif |
| 647 | |
| 648 | return result; |
| 649 | } |
| 650 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 651 | /* 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] | 652 | static void dlfb_ops_copyarea(struct fb_info *info, |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 653 | const struct fb_copyarea *area) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 654 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 655 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 656 | struct dlfb_data *dev = info->par; |
| 657 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 658 | #if defined CONFIG_FB_SYS_COPYAREA || defined CONFIG_FB_SYS_COPYAREA_MODULE |
| 659 | |
| 660 | sys_copyarea(info, area); |
| 661 | |
| 662 | dlfb_handle_damage(dev, area->dx, area->dy, |
| 663 | area->width, area->height, info->screen_base); |
| 664 | #endif |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 665 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 666 | } |
| 667 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 668 | static void dlfb_ops_imageblit(struct fb_info *info, |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 669 | const struct fb_image *image) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 670 | { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 671 | struct dlfb_data *dev = info->par; |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 672 | |
| 673 | #if defined CONFIG_FB_SYS_IMAGEBLIT || defined CONFIG_FB_SYS_IMAGEBLIT_MODULE |
| 674 | |
| 675 | sys_imageblit(info, image); |
| 676 | |
| 677 | dlfb_handle_damage(dev, image->dx, image->dy, |
| 678 | image->width, image->height, info->screen_base); |
| 679 | |
| 680 | #endif |
| 681 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 682 | } |
| 683 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 684 | static void dlfb_ops_fillrect(struct fb_info *info, |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 685 | const struct fb_fillrect *rect) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 686 | { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 687 | struct dlfb_data *dev = info->par; |
| 688 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 689 | #if defined CONFIG_FB_SYS_FILLRECT || defined CONFIG_FB_SYS_FILLRECT_MODULE |
| 690 | |
| 691 | sys_fillrect(info, rect); |
| 692 | |
| 693 | dlfb_handle_damage(dev, rect->dx, rect->dy, rect->width, |
| 694 | rect->height, info->screen_base); |
| 695 | #endif |
| 696 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 697 | } |
| 698 | |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 699 | static void dlfb_get_edid(struct dlfb_data *dev) |
| 700 | { |
| 701 | int i; |
| 702 | int ret; |
| 703 | char rbuf[2]; |
| 704 | |
| 705 | for (i = 0; i < sizeof(dev->edid); i++) { |
| 706 | ret = usb_control_msg(dev->udev, |
| 707 | usb_rcvctrlpipe(dev->udev, 0), (0x02), |
| 708 | (0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2, |
| 709 | 0); |
| 710 | dev->edid[i] = rbuf[1]; |
| 711 | } |
| 712 | } |
| 713 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 714 | static int dlfb_ops_ioctl(struct fb_info *info, unsigned int cmd, |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 715 | unsigned long arg) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 716 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 717 | |
| 718 | struct dlfb_data *dev = info->par; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 719 | struct dloarea *area = NULL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 720 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 721 | if (!atomic_read(&dev->usb_active)) |
| 722 | return 0; |
| 723 | |
| 724 | /* TODO: Update X server to get this from sysfs instead */ |
| 725 | if (cmd == DLFB_IOCTL_RETURN_EDID) { |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 726 | char *edid = (char *)arg; |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 727 | dlfb_get_edid(dev); |
| 728 | if (copy_to_user(edid, dev->edid, sizeof(dev->edid))) |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 729 | return -EFAULT; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 730 | return 0; |
| 731 | } |
| 732 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 733 | /* TODO: Help propose a standard fb.h ioctl to report mmap damage */ |
| 734 | if (cmd == DLFB_IOCTL_REPORT_DAMAGE) { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 735 | |
| 736 | area = (struct dloarea *)arg; |
| 737 | |
| 738 | if (area->x < 0) |
| 739 | area->x = 0; |
| 740 | |
| 741 | if (area->x > info->var.xres) |
| 742 | area->x = info->var.xres; |
| 743 | |
| 744 | if (area->y < 0) |
| 745 | area->y = 0; |
| 746 | |
| 747 | if (area->y > info->var.yres) |
| 748 | area->y = info->var.yres; |
| 749 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 750 | atomic_set(&dev->use_defio, 0); |
| 751 | |
| 752 | 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] | 753 | info->screen_base); |
| 754 | } |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 755 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 756 | return 0; |
| 757 | } |
| 758 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 759 | /* taken from vesafb */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 760 | static int |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 761 | dlfb_ops_setcolreg(unsigned regno, unsigned red, unsigned green, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 762 | unsigned blue, unsigned transp, struct fb_info *info) |
| 763 | { |
| 764 | int err = 0; |
| 765 | |
| 766 | if (regno >= info->cmap.len) |
| 767 | return 1; |
| 768 | |
| 769 | if (regno < 16) { |
| 770 | if (info->var.red.offset == 10) { |
| 771 | /* 1:5:5:5 */ |
| 772 | ((u32 *) (info->pseudo_palette))[regno] = |
| 773 | ((red & 0xf800) >> 1) | |
| 774 | ((green & 0xf800) >> 6) | ((blue & 0xf800) >> 11); |
| 775 | } else { |
| 776 | /* 0:5:6:5 */ |
| 777 | ((u32 *) (info->pseudo_palette))[regno] = |
| 778 | ((red & 0xf800)) | |
| 779 | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11); |
| 780 | } |
| 781 | } |
| 782 | |
| 783 | return err; |
| 784 | } |
| 785 | |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 786 | /* |
| 787 | * It's common for several clients to have framebuffer open simultaneously. |
| 788 | * e.g. both fbcon and X. Makes things interesting. |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 789 | * Assumes caller is holding info->lock (for open and release at least) |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 790 | */ |
| 791 | static int dlfb_ops_open(struct fb_info *info, int user) |
| 792 | { |
| 793 | struct dlfb_data *dev = info->par; |
| 794 | |
| 795 | /* if (user == 0) |
| 796 | * We could special case kernel mode clients (fbcon) here |
| 797 | */ |
| 798 | |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 799 | /* If the USB device is gone, we don't accept new opens */ |
| 800 | if (dev->virtualized) |
| 801 | return -ENODEV; |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 802 | |
| 803 | dev->fb_count++; |
| 804 | |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 805 | kref_get(&dev->kref); |
| 806 | |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 807 | #ifdef CONFIG_FB_DEFERRED_IO |
| 808 | if ((atomic_read(&dev->use_defio)) && (info->fbdefio == NULL)) { |
| 809 | /* enable defio */ |
| 810 | info->fbdefio = &dlfb_defio; |
| 811 | fb_deferred_io_init(info); |
| 812 | } |
| 813 | #endif |
| 814 | |
| 815 | dl_notice("open /dev/fb%d user=%d fb_info=%p count=%d\n", |
| 816 | info->node, user, info, dev->fb_count); |
| 817 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 818 | return 0; |
| 819 | } |
| 820 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 821 | /* |
| 822 | * Called when all client interfaces to start transactions have been disabled, |
| 823 | * and all references to our device instance (dlfb_data) are released. |
| 824 | * Every transaction must have a reference, so we know are fully spun down |
| 825 | */ |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 826 | static void dlfb_free(struct kref *kref) |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 827 | { |
| 828 | struct dlfb_data *dev = container_of(kref, struct dlfb_data, kref); |
| 829 | |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 830 | /* this function will wait for all in-flight urbs to complete */ |
| 831 | if (dev->urbs.count > 0) |
| 832 | dlfb_free_urb_list(dev); |
| 833 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 834 | if (dev->backing_buffer) |
| 835 | vfree(dev->backing_buffer); |
| 836 | |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 837 | kfree(dev->edid); |
| 838 | |
| 839 | dl_warn("freeing dlfb_data %p\n", dev); |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 840 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 841 | kfree(dev); |
| 842 | } |
| 843 | |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 844 | |
| 845 | static void dlfb_free_framebuffer_work(struct work_struct *work) |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 846 | { |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 847 | struct dlfb_data *dev = container_of(work, struct dlfb_data, |
| 848 | free_framebuffer_work.work); |
| 849 | struct fb_info *info = dev->info; |
| 850 | int node = info->node; |
| 851 | |
| 852 | unregister_framebuffer(info); |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 853 | |
| 854 | if (info->cmap.len != 0) |
| 855 | fb_dealloc_cmap(&info->cmap); |
| 856 | if (info->monspecs.modedb) |
| 857 | fb_destroy_modedb(info->monspecs.modedb); |
| 858 | if (info->screen_base) |
| 859 | vfree(info->screen_base); |
| 860 | |
| 861 | fb_destroy_modelist(&info->modelist); |
| 862 | |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 863 | dev->info = 0; |
| 864 | |
| 865 | /* Assume info structure is freed after this point */ |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 866 | framebuffer_release(info); |
| 867 | |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 868 | dl_warn("fb_info for /dev/fb%d has been freed\n", node); |
| 869 | |
| 870 | /* ref taken in probe() as part of registering framebfufer */ |
| 871 | kref_put(&dev->kref, dlfb_free); |
| 872 | } |
| 873 | |
| 874 | /* |
| 875 | * Assumes caller is holding info->lock mutex (for open and release at least) |
| 876 | */ |
| 877 | static int dlfb_ops_release(struct fb_info *info, int user) |
| 878 | { |
| 879 | struct dlfb_data *dev = info->par; |
| 880 | |
| 881 | dev->fb_count--; |
| 882 | |
| 883 | /* We can't free fb_info here - fbmem will touch it when we return */ |
| 884 | if (dev->virtualized && (dev->fb_count == 0)) |
| 885 | schedule_delayed_work(&dev->free_framebuffer_work, HZ); |
| 886 | |
| 887 | #ifdef CONFIG_FB_DEFERRED_IO |
| 888 | if ((dev->fb_count == 0) && (info->fbdefio)) { |
| 889 | fb_deferred_io_cleanup(info); |
| 890 | kfree(info->fbdefio); |
| 891 | info->fbdefio = NULL; |
| 892 | info->fbops->fb_mmap = dlfb_ops_mmap; |
| 893 | } |
| 894 | #endif |
| 895 | |
| 896 | dl_warn("released /dev/fb%d user=%d count=%d\n", |
| 897 | info->node, user, dev->fb_count); |
| 898 | |
| 899 | kref_put(&dev->kref, dlfb_free); |
| 900 | |
| 901 | return 0; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 902 | } |
| 903 | |
| 904 | /* |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 905 | * Check whether a video mode is supported by the DisplayLink chip |
| 906 | * We start from monitor's modes, so don't need to filter that here |
| 907 | */ |
| 908 | static int dlfb_is_valid_mode(struct fb_videomode *mode, |
| 909 | struct fb_info *info) |
| 910 | { |
| 911 | struct dlfb_data *dev = info->par; |
| 912 | |
| 913 | if (mode->xres * mode->yres > dev->sku_pixel_limit) |
| 914 | return 0; |
| 915 | |
| 916 | return 1; |
| 917 | } |
| 918 | |
| 919 | static void dlfb_var_color_format(struct fb_var_screeninfo *var) |
| 920 | { |
| 921 | const struct fb_bitfield red = { 11, 5, 0 }; |
| 922 | const struct fb_bitfield green = { 5, 6, 0 }; |
| 923 | const struct fb_bitfield blue = { 0, 5, 0 }; |
| 924 | |
| 925 | var->bits_per_pixel = 16; |
| 926 | var->red = red; |
| 927 | var->green = green; |
| 928 | var->blue = blue; |
| 929 | } |
| 930 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 931 | static int dlfb_ops_check_var(struct fb_var_screeninfo *var, |
| 932 | struct fb_info *info) |
| 933 | { |
| 934 | struct fb_videomode mode; |
| 935 | |
| 936 | /* TODO: support dynamically changing framebuffer size */ |
| 937 | if ((var->xres * var->yres * 2) > info->fix.smem_len) |
| 938 | return -EINVAL; |
| 939 | |
| 940 | /* set device-specific elements of var unrelated to mode */ |
| 941 | dlfb_var_color_format(var); |
| 942 | |
| 943 | fb_var_to_videomode(&mode, var); |
| 944 | |
| 945 | if (!dlfb_is_valid_mode(&mode, info)) |
| 946 | return -EINVAL; |
| 947 | |
| 948 | return 0; |
| 949 | } |
| 950 | |
| 951 | static int dlfb_ops_set_par(struct fb_info *info) |
| 952 | { |
| 953 | struct dlfb_data *dev = info->par; |
| 954 | |
| 955 | dl_notice("set_par mode %dx%d\n", info->var.xres, info->var.yres); |
| 956 | |
| 957 | return dlfb_set_video_mode(dev, &info->var); |
| 958 | } |
| 959 | |
Bernie Thompson | 9825f70 | 2010-09-05 16:35:10 -0700 | [diff] [blame] | 960 | /* |
| 961 | * In order to come back from full DPMS off, we need to set the mode again |
| 962 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 963 | 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] | 964 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 965 | struct dlfb_data *dev = info->par; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 966 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 967 | if (blank_mode != FB_BLANK_UNBLANK) { |
Bernie Thompson | 9825f70 | 2010-09-05 16:35:10 -0700 | [diff] [blame] | 968 | char *bufptr; |
| 969 | struct urb *urb; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 970 | |
Bernie Thompson | 9825f70 | 2010-09-05 16:35:10 -0700 | [diff] [blame] | 971 | urb = dlfb_get_urb(dev); |
| 972 | if (!urb) |
| 973 | return 0; |
| 974 | |
| 975 | bufptr = (char *) urb->transfer_buffer; |
| 976 | bufptr = dlfb_vidreg_lock(bufptr); |
| 977 | bufptr = dlfb_enable_hvsync(bufptr, false); |
| 978 | bufptr = dlfb_vidreg_unlock(bufptr); |
| 979 | |
| 980 | dlfb_submit_urb(dev, urb, bufptr - |
| 981 | (char *) urb->transfer_buffer); |
| 982 | } else { |
| 983 | dlfb_set_video_mode(dev, &info->var); |
| 984 | } |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 985 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 986 | return 0; |
| 987 | } |
| 988 | |
| 989 | static struct fb_ops dlfb_ops = { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 990 | .owner = THIS_MODULE, |
Bernie Thompson | d46ecb9 | 2010-09-05 16:35:04 -0700 | [diff] [blame] | 991 | .fb_read = dlfb_ops_read, |
| 992 | .fb_write = dlfb_ops_write, |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 993 | .fb_setcolreg = dlfb_ops_setcolreg, |
| 994 | .fb_fillrect = dlfb_ops_fillrect, |
| 995 | .fb_copyarea = dlfb_ops_copyarea, |
| 996 | .fb_imageblit = dlfb_ops_imageblit, |
| 997 | .fb_mmap = dlfb_ops_mmap, |
| 998 | .fb_ioctl = dlfb_ops_ioctl, |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 999 | .fb_open = dlfb_ops_open, |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 1000 | .fb_release = dlfb_ops_release, |
| 1001 | .fb_blank = dlfb_ops_blank, |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1002 | .fb_check_var = dlfb_ops_check_var, |
| 1003 | .fb_set_par = dlfb_ops_set_par, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1004 | }; |
| 1005 | |
Bernie Thompson | cc403dc | 2010-02-15 06:45:49 -0800 | [diff] [blame] | 1006 | /* |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 1007 | * Calls dlfb_get_edid() to query the EDID of attached monitor via usb cmds |
| 1008 | * Then parses EDID into three places used by various parts of fbdev: |
| 1009 | * fb_var_screeninfo contains the timing of the monitor's preferred mode |
| 1010 | * fb_info.monspecs is full parsed EDID info, including monspecs.modedb |
| 1011 | * fb_info.modelist is a linked list of all monitor & VESA modes which work |
| 1012 | * |
| 1013 | * If EDID is not readable/valid, then modelist is all VESA modes, |
| 1014 | * monspecs is NULL, and fb_var_screeninfo is set to safe VESA mode |
| 1015 | * Returns 0 if EDID parses successfully |
| 1016 | */ |
| 1017 | static int dlfb_parse_edid(struct dlfb_data *dev, |
| 1018 | struct fb_var_screeninfo *var, |
| 1019 | struct fb_info *info) |
| 1020 | { |
| 1021 | int i; |
| 1022 | const struct fb_videomode *default_vmode = NULL; |
| 1023 | int result = 0; |
| 1024 | |
| 1025 | fb_destroy_modelist(&info->modelist); |
| 1026 | memset(&info->monspecs, 0, sizeof(info->monspecs)); |
| 1027 | |
| 1028 | dlfb_get_edid(dev); |
| 1029 | fb_edid_to_monspecs(dev->edid, &info->monspecs); |
| 1030 | |
| 1031 | if (info->monspecs.modedb_len > 0) { |
| 1032 | |
| 1033 | for (i = 0; i < info->monspecs.modedb_len; i++) { |
| 1034 | if (dlfb_is_valid_mode(&info->monspecs.modedb[i], info)) |
| 1035 | fb_add_videomode(&info->monspecs.modedb[i], |
| 1036 | &info->modelist); |
| 1037 | } |
| 1038 | |
| 1039 | default_vmode = fb_find_best_display(&info->monspecs, |
| 1040 | &info->modelist); |
| 1041 | } else { |
| 1042 | struct fb_videomode fb_vmode = {0}; |
| 1043 | |
| 1044 | dl_err("Unable to get valid EDID from device/display\n"); |
| 1045 | result = 1; |
| 1046 | |
| 1047 | /* |
| 1048 | * Add the standard VESA modes to our modelist |
| 1049 | * Since we don't have EDID, there may be modes that |
| 1050 | * overspec monitor and/or are incorrect aspect ratio, etc. |
| 1051 | * But at least the user has a chance to choose |
| 1052 | */ |
| 1053 | for (i = 0; i < VESA_MODEDB_SIZE; i++) { |
| 1054 | if (dlfb_is_valid_mode((struct fb_videomode *) |
| 1055 | &vesa_modes[i], info)) |
| 1056 | fb_add_videomode(&vesa_modes[i], |
| 1057 | &info->modelist); |
| 1058 | } |
| 1059 | |
| 1060 | /* |
| 1061 | * default to resolution safe for projectors |
| 1062 | * (since they are most common case without EDID) |
| 1063 | */ |
| 1064 | fb_vmode.xres = 800; |
| 1065 | fb_vmode.yres = 600; |
| 1066 | fb_vmode.refresh = 60; |
| 1067 | default_vmode = fb_find_nearest_mode(&fb_vmode, |
| 1068 | &info->modelist); |
| 1069 | } |
| 1070 | |
| 1071 | fb_videomode_to_var(var, default_vmode); |
| 1072 | dlfb_var_color_format(var); |
| 1073 | |
| 1074 | return result; |
| 1075 | } |
| 1076 | |
| 1077 | static ssize_t metrics_bytes_rendered_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_rendered)); |
| 1083 | } |
| 1084 | |
| 1085 | static ssize_t metrics_bytes_identical_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_identical)); |
| 1091 | } |
| 1092 | |
| 1093 | static ssize_t metrics_bytes_sent_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->bytes_sent)); |
| 1099 | } |
| 1100 | |
| 1101 | static ssize_t metrics_cpu_kcycles_used_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, "%u\n", |
| 1106 | atomic_read(&dev->cpu_kcycles_used)); |
| 1107 | } |
| 1108 | |
Chris Wright | 2c3c8be | 2010-05-12 18:28:57 -0700 | [diff] [blame] | 1109 | static ssize_t edid_show(struct file *filp, struct kobject *kobj, |
| 1110 | struct bin_attribute *a, |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 1111 | char *buf, loff_t off, size_t count) { |
| 1112 | struct device *fbdev = container_of(kobj, struct device, kobj); |
| 1113 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1114 | struct dlfb_data *dev = fb_info->par; |
| 1115 | char *edid = &dev->edid[0]; |
| 1116 | const size_t size = sizeof(dev->edid); |
| 1117 | |
| 1118 | if (dlfb_parse_edid(dev, &fb_info->var, fb_info)) |
| 1119 | return 0; |
| 1120 | |
| 1121 | if (off >= size) |
| 1122 | return 0; |
| 1123 | |
| 1124 | if (off + count > size) |
| 1125 | count = size - off; |
| 1126 | memcpy(buf, edid + off, count); |
| 1127 | |
| 1128 | return count; |
| 1129 | } |
| 1130 | |
| 1131 | |
| 1132 | static ssize_t metrics_reset_store(struct device *fbdev, |
| 1133 | struct device_attribute *attr, |
| 1134 | const char *buf, size_t count) |
| 1135 | { |
| 1136 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1137 | struct dlfb_data *dev = fb_info->par; |
| 1138 | |
| 1139 | atomic_set(&dev->bytes_rendered, 0); |
| 1140 | atomic_set(&dev->bytes_identical, 0); |
| 1141 | atomic_set(&dev->bytes_sent, 0); |
| 1142 | atomic_set(&dev->cpu_kcycles_used, 0); |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 1143 | |
| 1144 | return count; |
| 1145 | } |
| 1146 | |
| 1147 | static ssize_t use_defio_show(struct device *fbdev, |
| 1148 | struct device_attribute *a, char *buf) { |
| 1149 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1150 | struct dlfb_data *dev = fb_info->par; |
| 1151 | return snprintf(buf, PAGE_SIZE, "%d\n", |
| 1152 | atomic_read(&dev->use_defio)); |
| 1153 | } |
| 1154 | |
| 1155 | static ssize_t use_defio_store(struct device *fbdev, |
| 1156 | struct device_attribute *attr, |
| 1157 | const char *buf, size_t count) |
| 1158 | { |
| 1159 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1160 | struct dlfb_data *dev = fb_info->par; |
| 1161 | |
| 1162 | if (count > 0) { |
| 1163 | if (buf[0] == '0') |
| 1164 | atomic_set(&dev->use_defio, 0); |
| 1165 | if (buf[0] == '1') |
| 1166 | atomic_set(&dev->use_defio, 1); |
| 1167 | } |
| 1168 | return count; |
| 1169 | } |
| 1170 | |
| 1171 | static struct bin_attribute edid_attr = { |
| 1172 | .attr.name = "edid", |
| 1173 | .attr.mode = 0444, |
| 1174 | .size = 128, |
| 1175 | .read = edid_show, |
| 1176 | }; |
| 1177 | |
| 1178 | static struct device_attribute fb_device_attrs[] = { |
| 1179 | __ATTR_RO(metrics_bytes_rendered), |
| 1180 | __ATTR_RO(metrics_bytes_identical), |
| 1181 | __ATTR_RO(metrics_bytes_sent), |
| 1182 | __ATTR_RO(metrics_cpu_kcycles_used), |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 1183 | __ATTR(metrics_reset, S_IWUGO, NULL, metrics_reset_store), |
| 1184 | __ATTR_RW(use_defio), |
| 1185 | }; |
| 1186 | |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 1187 | #ifdef CONFIG_FB_DEFERRED_IO |
| 1188 | static void dlfb_dpy_deferred_io(struct fb_info *info, |
| 1189 | struct list_head *pagelist) |
| 1190 | { |
| 1191 | struct page *cur; |
| 1192 | struct fb_deferred_io *fbdefio = info->fbdefio; |
| 1193 | struct dlfb_data *dev = info->par; |
| 1194 | struct urb *urb; |
| 1195 | char *cmd; |
| 1196 | cycles_t start_cycles, end_cycles; |
| 1197 | int bytes_sent = 0; |
| 1198 | int bytes_identical = 0; |
| 1199 | int bytes_rendered = 0; |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 1200 | |
| 1201 | if (!atomic_read(&dev->use_defio)) |
| 1202 | return; |
| 1203 | |
| 1204 | if (!atomic_read(&dev->usb_active)) |
| 1205 | return; |
| 1206 | |
| 1207 | start_cycles = get_cycles(); |
| 1208 | |
| 1209 | urb = dlfb_get_urb(dev); |
| 1210 | if (!urb) |
| 1211 | return; |
| 1212 | cmd = urb->transfer_buffer; |
| 1213 | |
| 1214 | /* walk the written page list and render each to device */ |
| 1215 | list_for_each_entry(cur, &fbdefio->pagelist, lru) { |
| 1216 | dlfb_render_hline(dev, &urb, (char *) info->fix.smem_start, |
| 1217 | &cmd, cur->index << PAGE_SHIFT, |
| 1218 | PAGE_SIZE, &bytes_identical, &bytes_sent); |
| 1219 | bytes_rendered += PAGE_SIZE; |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 1220 | } |
| 1221 | |
| 1222 | if (cmd > (char *) urb->transfer_buffer) { |
| 1223 | /* Send partial buffer remaining before exiting */ |
| 1224 | int len = cmd - (char *) urb->transfer_buffer; |
| 1225 | dlfb_submit_urb(dev, urb, len); |
| 1226 | bytes_sent += len; |
| 1227 | } else |
| 1228 | dlfb_urb_completion(urb); |
| 1229 | |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 1230 | atomic_add(bytes_sent, &dev->bytes_sent); |
| 1231 | atomic_add(bytes_identical, &dev->bytes_identical); |
| 1232 | atomic_add(bytes_rendered, &dev->bytes_rendered); |
| 1233 | end_cycles = get_cycles(); |
| 1234 | atomic_add(((unsigned int) ((end_cycles - start_cycles) |
| 1235 | >> 10)), /* Kcycles */ |
| 1236 | &dev->cpu_kcycles_used); |
| 1237 | } |
| 1238 | |
| 1239 | static struct fb_deferred_io dlfb_defio = { |
| 1240 | .delay = 5, |
| 1241 | .deferred_io = dlfb_dpy_deferred_io, |
| 1242 | }; |
| 1243 | |
| 1244 | #endif |
| 1245 | |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 1246 | /* |
Bernie Thompson | cc403dc | 2010-02-15 06:45:49 -0800 | [diff] [blame] | 1247 | * This is necessary before we can communicate with the display controller. |
| 1248 | */ |
| 1249 | static int dlfb_select_std_channel(struct dlfb_data *dev) |
| 1250 | { |
| 1251 | int ret; |
| 1252 | u8 set_def_chn[] = { 0x57, 0xCD, 0xDC, 0xA7, |
| 1253 | 0x1C, 0x88, 0x5E, 0x15, |
| 1254 | 0x60, 0xFE, 0xC6, 0x97, |
| 1255 | 0x16, 0x3D, 0x47, 0xF2 }; |
| 1256 | |
| 1257 | ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), |
| 1258 | NR_USB_REQUEST_CHANNEL, |
| 1259 | (USB_DIR_OUT | USB_TYPE_VENDOR), 0, 0, |
| 1260 | set_def_chn, sizeof(set_def_chn), USB_CTRL_SET_TIMEOUT); |
| 1261 | return ret; |
| 1262 | } |
| 1263 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1264 | |
| 1265 | static int dlfb_usb_probe(struct usb_interface *interface, |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1266 | const struct usb_device_id *id) |
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 | struct usb_device *usbdev; |
| 1269 | struct dlfb_data *dev; |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 1270 | struct fb_info *info = 0; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1271 | int videomemorysize; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1272 | int i; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1273 | unsigned char *videomemory; |
| 1274 | int retval = -ENOMEM; |
| 1275 | struct fb_var_screeninfo *var; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1276 | u16 *pix_framebuffer; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1277 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1278 | /* usb initialization */ |
| 1279 | |
| 1280 | usbdev = interface_to_usbdev(interface); |
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 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 1283 | if (dev == NULL) { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1284 | err("dlfb_usb_probe: failed alloc of dev struct\n"); |
| 1285 | goto error; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1286 | } |
| 1287 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1288 | /* we need to wait for both usb and fbdev to spin down on disconnect */ |
| 1289 | kref_init(&dev->kref); /* matching kref_put in usb .disconnect fn */ |
| 1290 | kref_get(&dev->kref); /* matching kref_put in .fb_destroy function*/ |
| 1291 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1292 | dev->udev = usbdev; |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1293 | dev->gdev = &usbdev->dev; /* our generic struct device * */ |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1294 | usb_set_intfdata(interface, dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1295 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1296 | if (!dlfb_alloc_urb_list(dev, WRITES_IN_FLIGHT, MAX_TRANSFER)) { |
| 1297 | retval = -ENOMEM; |
| 1298 | dl_err("dlfb_alloc_urb_list failed\n"); |
| 1299 | goto error; |
| 1300 | } |
| 1301 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1302 | /* 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] | 1303 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1304 | /* allocates framebuffer driver structure, not framebuffer memory */ |
| 1305 | info = framebuffer_alloc(0, &usbdev->dev); |
| 1306 | if (!info) { |
| 1307 | retval = -ENOMEM; |
| 1308 | dl_err("framebuffer_alloc failed\n"); |
| 1309 | goto error; |
| 1310 | } |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 1311 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1312 | dev->info = info; |
| 1313 | info->par = dev; |
| 1314 | info->pseudo_palette = dev->pseudo_palette; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1315 | info->fbops = &dlfb_ops; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1316 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1317 | var = &info->var; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1318 | |
| 1319 | /* TODO set limit based on actual SKU detection */ |
| 1320 | dev->sku_pixel_limit = 2048 * 1152; |
| 1321 | |
| 1322 | INIT_LIST_HEAD(&info->modelist); |
| 1323 | dlfb_parse_edid(dev, var, info); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1324 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1325 | /* |
| 1326 | * 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] | 1327 | */ |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1328 | info->fix = dlfb_fix; |
| 1329 | info->fix.line_length = var->xres * (var->bits_per_pixel / 8); |
| 1330 | videomemorysize = info->fix.line_length * var->yres; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1331 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1332 | /* |
| 1333 | * The big chunk of system memory we use as a virtual framebuffer. |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1334 | * TODO: Handle fbcon cursor code calling blit in interrupt context |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1335 | */ |
| 1336 | videomemory = vmalloc(videomemorysize); |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1337 | if (!videomemory) { |
| 1338 | retval = -ENOMEM; |
| 1339 | dl_err("Virtual framebuffer alloc failed\n"); |
| 1340 | goto error; |
| 1341 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1342 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1343 | info->screen_base = videomemory; |
| 1344 | info->fix.smem_len = PAGE_ALIGN(videomemorysize); |
| 1345 | info->fix.smem_start = (unsigned long) videomemory; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1346 | info->flags = udlfb_info_flags; |
| 1347 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1348 | |
| 1349 | /* |
| 1350 | * Second framebuffer copy, mirroring the state of the framebuffer |
| 1351 | * on the physical USB device. We can function without this. |
| 1352 | * But with imperfect damage info we may end up sending pixels over USB |
| 1353 | * that were, in fact, unchanged -- wasting limited USB bandwidth |
| 1354 | */ |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1355 | dev->backing_buffer = vmalloc(videomemorysize); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1356 | if (!dev->backing_buffer) |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1357 | dl_warn("No shadow/backing buffer allcoated\n"); |
| 1358 | else |
| 1359 | memset(dev->backing_buffer, 0, videomemorysize); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1360 | |
| 1361 | retval = fb_alloc_cmap(&info->cmap, 256, 0); |
| 1362 | if (retval < 0) { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1363 | dl_err("fb_alloc_cmap failed %x\n", retval); |
| 1364 | goto error; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1365 | } |
| 1366 | |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 1367 | INIT_DELAYED_WORK(&dev->free_framebuffer_work, |
| 1368 | dlfb_free_framebuffer_work); |
| 1369 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1370 | /* ready to begin using device */ |
| 1371 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1372 | #ifdef CONFIG_FB_DEFERRED_IO |
| 1373 | atomic_set(&dev->use_defio, 1); |
| 1374 | #endif |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1375 | atomic_set(&dev->usb_active, 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1376 | dlfb_select_std_channel(dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1377 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1378 | dlfb_ops_check_var(var, info); |
| 1379 | dlfb_ops_set_par(info); |
| 1380 | |
| 1381 | /* paint greenscreen */ |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1382 | pix_framebuffer = (u16 *) videomemory; |
| 1383 | for (i = 0; i < videomemorysize / 2; i++) |
| 1384 | pix_framebuffer[i] = 0x37e6; |
| 1385 | |
| 1386 | dlfb_handle_damage(dev, 0, 0, info->var.xres, info->var.yres, |
| 1387 | videomemory); |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 1388 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1389 | retval = register_framebuffer(info); |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1390 | if (retval < 0) { |
| 1391 | dl_err("register_framebuffer failed %d\n", retval); |
| 1392 | goto error; |
| 1393 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1394 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1395 | for (i = 0; i < ARRAY_SIZE(fb_device_attrs); i++) |
| 1396 | device_create_file(info->dev, &fb_device_attrs[i]); |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 1397 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1398 | device_create_bin_file(info->dev, &edid_attr); |
| 1399 | |
| 1400 | dl_err("DisplayLink USB device /dev/fb%d attached. %dx%d resolution." |
| 1401 | " Using %dK framebuffer memory\n", info->node, |
| 1402 | var->xres, var->yres, |
| 1403 | ((dev->backing_buffer) ? |
| 1404 | videomemorysize * 2 : videomemorysize) >> 10); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1405 | return 0; |
| 1406 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1407 | error: |
| 1408 | if (dev) { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1409 | |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 1410 | if (info) { |
| 1411 | if (info->cmap.len != 0) |
| 1412 | fb_dealloc_cmap(&info->cmap); |
| 1413 | if (info->monspecs.modedb) |
| 1414 | fb_destroy_modedb(info->monspecs.modedb); |
| 1415 | if (info->screen_base) |
| 1416 | vfree(info->screen_base); |
| 1417 | |
| 1418 | fb_destroy_modelist(&info->modelist); |
| 1419 | |
| 1420 | framebuffer_release(info); |
| 1421 | } |
| 1422 | |
| 1423 | if (dev->backing_buffer) |
| 1424 | vfree(dev->backing_buffer); |
| 1425 | |
| 1426 | kref_put(&dev->kref, dlfb_free); /* ref for framebuffer */ |
| 1427 | kref_put(&dev->kref, dlfb_free); /* last ref from kref_init */ |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1428 | |
| 1429 | /* dev has been deallocated. Do not dereference */ |
| 1430 | } |
| 1431 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1432 | return retval; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1433 | } |
| 1434 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1435 | static void dlfb_usb_disconnect(struct usb_interface *interface) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1436 | { |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1437 | struct dlfb_data *dev; |
| 1438 | struct fb_info *info; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1439 | int i; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1440 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1441 | dev = usb_get_intfdata(interface); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1442 | info = dev->info; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1443 | |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 1444 | dl_info("USB disconnect starting\n"); |
| 1445 | |
| 1446 | /* we virtualize until all fb clients release. Then we free */ |
| 1447 | dev->virtualized = true; |
| 1448 | |
| 1449 | /* When non-active we'll update virtual framebuffer, but no new urbs */ |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1450 | atomic_set(&dev->usb_active, 0); |
| 1451 | |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 1452 | /* remove udlfb's sysfs interfaces */ |
| 1453 | for (i = 0; i < ARRAY_SIZE(fb_device_attrs); i++) |
| 1454 | device_remove_file(info->dev, &fb_device_attrs[i]); |
| 1455 | device_remove_bin_file(info->dev, &edid_attr); |
| 1456 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1457 | usb_set_intfdata(interface, NULL); |
| 1458 | |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 1459 | /* if clients still have us open, will be freed on last close */ |
| 1460 | if (dev->fb_count == 0) |
| 1461 | schedule_delayed_work(&dev->free_framebuffer_work, 0); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1462 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1463 | /* release reference taken by kref_init in probe() */ |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 1464 | kref_put(&dev->kref, dlfb_free); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1465 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1466 | /* consider dlfb_data freed */ |
| 1467 | |
| 1468 | return; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1469 | } |
| 1470 | |
| 1471 | static struct usb_driver dlfb_driver = { |
| 1472 | .name = "udlfb", |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1473 | .probe = dlfb_usb_probe, |
| 1474 | .disconnect = dlfb_usb_disconnect, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1475 | .id_table = id_table, |
| 1476 | }; |
| 1477 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1478 | static int __init dlfb_module_init(void) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1479 | { |
| 1480 | int res; |
| 1481 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1482 | res = usb_register(&dlfb_driver); |
| 1483 | if (res) |
| 1484 | err("usb_register failed. Error number %d", res); |
| 1485 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1486 | return res; |
| 1487 | } |
| 1488 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1489 | static void __exit dlfb_module_exit(void) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1490 | { |
| 1491 | usb_deregister(&dlfb_driver); |
| 1492 | } |
| 1493 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1494 | module_init(dlfb_module_init); |
| 1495 | module_exit(dlfb_module_exit); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1496 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1497 | static void dlfb_urb_completion(struct urb *urb) |
| 1498 | { |
| 1499 | struct urb_node *unode = urb->context; |
| 1500 | struct dlfb_data *dev = unode->dev; |
| 1501 | unsigned long flags; |
| 1502 | |
| 1503 | /* sync/async unlink faults aren't errors */ |
| 1504 | if (urb->status) { |
| 1505 | if (!(urb->status == -ENOENT || |
| 1506 | urb->status == -ECONNRESET || |
| 1507 | urb->status == -ESHUTDOWN)) { |
| 1508 | dl_err("%s - nonzero write bulk status received: %d\n", |
| 1509 | __func__, urb->status); |
| 1510 | atomic_set(&dev->lost_pixels, 1); |
| 1511 | } |
| 1512 | } |
| 1513 | |
| 1514 | urb->transfer_buffer_length = dev->urbs.size; /* reset to actual */ |
| 1515 | |
| 1516 | spin_lock_irqsave(&dev->urbs.lock, flags); |
| 1517 | list_add_tail(&unode->entry, &dev->urbs.list); |
| 1518 | dev->urbs.available++; |
| 1519 | spin_unlock_irqrestore(&dev->urbs.lock, flags); |
| 1520 | |
| 1521 | up(&dev->urbs.limit_sem); |
| 1522 | } |
| 1523 | |
| 1524 | static void dlfb_free_urb_list(struct dlfb_data *dev) |
| 1525 | { |
| 1526 | int count = dev->urbs.count; |
| 1527 | struct list_head *node; |
| 1528 | struct urb_node *unode; |
| 1529 | struct urb *urb; |
| 1530 | int ret; |
| 1531 | unsigned long flags; |
| 1532 | |
| 1533 | dl_notice("Waiting for completes and freeing all render urbs\n"); |
| 1534 | |
| 1535 | /* keep waiting and freeing, until we've got 'em all */ |
| 1536 | while (count--) { |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 1537 | |
| 1538 | /* Getting interrupted means a leak, but ok at shutdown*/ |
| 1539 | ret = down_interruptible(&dev->urbs.limit_sem); |
| 1540 | if (ret) |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1541 | break; |
Bernie Thompson | 33077b8 | 2010-09-05 16:35:19 -0700 | [diff] [blame^] | 1542 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1543 | spin_lock_irqsave(&dev->urbs.lock, flags); |
| 1544 | |
| 1545 | node = dev->urbs.list.next; /* have reserved one with sem */ |
| 1546 | list_del_init(node); |
| 1547 | |
| 1548 | spin_unlock_irqrestore(&dev->urbs.lock, flags); |
| 1549 | |
| 1550 | unode = list_entry(node, struct urb_node, entry); |
| 1551 | urb = unode->urb; |
| 1552 | |
| 1553 | /* Free each separately allocated piece */ |
Greg Kroah-Hartman | c220cc3 | 2010-04-29 15:36:29 -0700 | [diff] [blame] | 1554 | usb_free_coherent(urb->dev, dev->urbs.size, |
| 1555 | urb->transfer_buffer, urb->transfer_dma); |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1556 | usb_free_urb(urb); |
| 1557 | kfree(node); |
| 1558 | } |
| 1559 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1560 | } |
| 1561 | |
| 1562 | static int dlfb_alloc_urb_list(struct dlfb_data *dev, int count, size_t size) |
| 1563 | { |
| 1564 | int i = 0; |
| 1565 | struct urb *urb; |
| 1566 | struct urb_node *unode; |
| 1567 | char *buf; |
| 1568 | |
| 1569 | spin_lock_init(&dev->urbs.lock); |
| 1570 | |
| 1571 | dev->urbs.size = size; |
| 1572 | INIT_LIST_HEAD(&dev->urbs.list); |
| 1573 | |
| 1574 | while (i < count) { |
| 1575 | unode = kzalloc(sizeof(struct urb_node), GFP_KERNEL); |
| 1576 | if (!unode) |
| 1577 | break; |
| 1578 | unode->dev = dev; |
| 1579 | |
| 1580 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1581 | if (!urb) { |
| 1582 | kfree(unode); |
| 1583 | break; |
| 1584 | } |
| 1585 | unode->urb = urb; |
| 1586 | |
Greg Kroah-Hartman | c220cc3 | 2010-04-29 15:36:29 -0700 | [diff] [blame] | 1587 | buf = usb_alloc_coherent(dev->udev, MAX_TRANSFER, GFP_KERNEL, |
| 1588 | &urb->transfer_dma); |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1589 | if (!buf) { |
| 1590 | kfree(unode); |
| 1591 | usb_free_urb(urb); |
| 1592 | break; |
| 1593 | } |
| 1594 | |
| 1595 | /* urb->transfer_buffer_length set to actual before submit */ |
| 1596 | usb_fill_bulk_urb(urb, dev->udev, usb_sndbulkpipe(dev->udev, 1), |
| 1597 | buf, size, dlfb_urb_completion, unode); |
| 1598 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 1599 | |
| 1600 | list_add_tail(&unode->entry, &dev->urbs.list); |
| 1601 | |
| 1602 | i++; |
| 1603 | } |
| 1604 | |
| 1605 | sema_init(&dev->urbs.limit_sem, i); |
| 1606 | dev->urbs.count = i; |
| 1607 | dev->urbs.available = i; |
| 1608 | |
Soeren Moeller | b5a2104 | 2010-05-14 19:03:00 +0000 | [diff] [blame] | 1609 | dl_notice("allocated %d %d byte urbs\n", i, (int) size); |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1610 | |
| 1611 | return i; |
| 1612 | } |
| 1613 | |
| 1614 | static struct urb *dlfb_get_urb(struct dlfb_data *dev) |
| 1615 | { |
| 1616 | int ret = 0; |
| 1617 | struct list_head *entry; |
| 1618 | struct urb_node *unode; |
| 1619 | struct urb *urb = NULL; |
| 1620 | unsigned long flags; |
| 1621 | |
| 1622 | /* Wait for an in-flight buffer to complete and get re-queued */ |
| 1623 | ret = down_timeout(&dev->urbs.limit_sem, GET_URB_TIMEOUT); |
| 1624 | if (ret) { |
| 1625 | atomic_set(&dev->lost_pixels, 1); |
| 1626 | dl_err("wait for urb interrupted: %x\n", ret); |
| 1627 | goto error; |
| 1628 | } |
| 1629 | |
| 1630 | spin_lock_irqsave(&dev->urbs.lock, flags); |
| 1631 | |
| 1632 | BUG_ON(list_empty(&dev->urbs.list)); /* reserved one with limit_sem */ |
| 1633 | entry = dev->urbs.list.next; |
| 1634 | list_del_init(entry); |
| 1635 | dev->urbs.available--; |
| 1636 | |
| 1637 | spin_unlock_irqrestore(&dev->urbs.lock, flags); |
| 1638 | |
| 1639 | unode = list_entry(entry, struct urb_node, entry); |
| 1640 | urb = unode->urb; |
| 1641 | |
| 1642 | error: |
| 1643 | return urb; |
| 1644 | } |
| 1645 | |
| 1646 | static int dlfb_submit_urb(struct dlfb_data *dev, struct urb *urb, size_t len) |
| 1647 | { |
| 1648 | int ret; |
| 1649 | |
| 1650 | BUG_ON(len > dev->urbs.size); |
| 1651 | |
| 1652 | urb->transfer_buffer_length = len; /* set to actual payload len */ |
| 1653 | ret = usb_submit_urb(urb, GFP_KERNEL); |
| 1654 | if (ret) { |
| 1655 | dlfb_urb_completion(urb); /* because no one else will */ |
| 1656 | atomic_set(&dev->lost_pixels, 1); |
| 1657 | dl_err("usb_submit_urb error %x\n", ret); |
| 1658 | } |
| 1659 | return ret; |
| 1660 | } |
| 1661 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1662 | MODULE_AUTHOR("Roberto De Ioris <roberto@unbit.it>, " |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1663 | "Jaya Kumar <jayakumar.lkml@gmail.com>, " |
| 1664 | "Bernie Thompson <bernie@plugable.com>"); |
| 1665 | MODULE_DESCRIPTION("DisplayLink kernel framebuffer driver"); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1666 | MODULE_LICENSE("GPL"); |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1667 | |