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> |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 28 | |
| 29 | #include "udlfb.h" |
| 30 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 31 | static struct fb_fix_screeninfo dlfb_fix = { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 32 | .id = "udlfb", |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 33 | .type = FB_TYPE_PACKED_PIXELS, |
| 34 | .visual = FB_VISUAL_TRUECOLOR, |
| 35 | .xpanstep = 0, |
| 36 | .ypanstep = 0, |
| 37 | .ywrapstep = 0, |
| 38 | .accel = FB_ACCEL_NONE, |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 39 | }; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 40 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 41 | static const u32 udlfb_info_flags = FBINFO_DEFAULT | FBINFO_READS_FAST | |
| 42 | #ifdef FBINFO_VIRTFB |
| 43 | FBINFO_VIRTFB | |
| 44 | #endif |
| 45 | FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_FILLRECT | |
| 46 | FBINFO_HWACCEL_COPYAREA | FBINFO_MISC_ALWAYS_SETPAR; |
| 47 | |
Bernie Thompson | cc403dc | 2010-02-15 06:45:49 -0800 | [diff] [blame] | 48 | /* |
| 49 | * There are many DisplayLink-based products, all with unique PIDs. We are able |
| 50 | * to support all volume ones (circa 2009) with a single driver, so we match |
| 51 | * globally on VID. TODO: Probe() needs to detect when we might be running |
| 52 | * "future" chips, and bail on those, so a compatible driver can match. |
| 53 | */ |
| 54 | static struct usb_device_id id_table[] = { |
| 55 | {.idVendor = 0x17e9, .match_flags = USB_DEVICE_ID_MATCH_VENDOR,}, |
| 56 | {}, |
| 57 | }; |
| 58 | MODULE_DEVICE_TABLE(usb, id_table); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 59 | |
Bernie Thompson | dd8015f | 2010-02-15 06:46:35 -0800 | [diff] [blame] | 60 | #ifndef CONFIG_FB_DEFERRED_IO |
Pavel Machek | 3b7b31f | 2010-04-03 07:00:37 +0200 | [diff] [blame] | 61 | #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] | 62 | #endif |
| 63 | |
| 64 | #ifndef CONFIG_FB_SYS_IMAGEBLIT |
| 65 | #ifndef CONFIG_FB_SYS_IMAGEBLIT_MODULE |
Pavel Machek | 3b7b31f | 2010-04-03 07:00:37 +0200 | [diff] [blame] | 66 | #warning Please set CONFIG_FB_SYS_IMAGEBLIT option to support fb console |
Bernie Thompson | dd8015f | 2010-02-15 06:46:35 -0800 | [diff] [blame] | 67 | #endif |
| 68 | #endif |
| 69 | |
| 70 | #ifndef CONFIG_FB_MODE_HELPERS |
Pavel Machek | 3b7b31f | 2010-04-03 07:00:37 +0200 | [diff] [blame] | 71 | #warning CONFIG_FB_MODE_HELPERS required. Expect build break |
Bernie Thompson | dd8015f | 2010-02-15 06:46:35 -0800 | [diff] [blame] | 72 | #endif |
| 73 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 74 | /* dlfb keeps a list of urbs for efficient bulk transfers */ |
| 75 | static void dlfb_urb_completion(struct urb *urb); |
| 76 | static struct urb *dlfb_get_urb(struct dlfb_data *dev); |
| 77 | static int dlfb_submit_urb(struct dlfb_data *dev, struct urb * urb, size_t len); |
| 78 | static int dlfb_alloc_urb_list(struct dlfb_data *dev, int count, size_t size); |
| 79 | static void dlfb_free_urb_list(struct dlfb_data *dev); |
| 80 | |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 81 | /* other symbols with dependents */ |
| 82 | #ifdef CONFIG_FB_DEFERRED_IO |
| 83 | static struct fb_deferred_io dlfb_defio; |
| 84 | #endif |
| 85 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 86 | /* |
Bernie Thompson | bd80816 | 2010-02-15 06:46:48 -0800 | [diff] [blame] | 87 | * All DisplayLink bulk operations start with 0xAF, followed by specific code |
| 88 | * 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] | 89 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 90 | static char *dlfb_set_register(char *buf, u8 reg, u8 val) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 91 | { |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 92 | *buf++ = 0xAF; |
| 93 | *buf++ = 0x20; |
| 94 | *buf++ = reg; |
| 95 | *buf++ = val; |
| 96 | return buf; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 97 | } |
| 98 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 99 | static char *dlfb_vidreg_lock(char *buf) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 100 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 101 | return dlfb_set_register(buf, 0xFF, 0x00); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 102 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 103 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 104 | static char *dlfb_vidreg_unlock(char *buf) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 105 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 106 | return dlfb_set_register(buf, 0xFF, 0xFF); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 107 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 108 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 109 | /* |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 110 | * On/Off for driving the DisplayLink framebuffer to the display |
Bernie Thompson | 9825f70 | 2010-09-05 16:35:10 -0700 | [diff] [blame] | 111 | * 0x00 H and V sync on |
| 112 | * 0x01 H and V sync off (screen blank but powered) |
| 113 | * 0x07 DPMS powerdown (requires modeset to come back) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 114 | */ |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 115 | static char *dlfb_enable_hvsync(char *buf, bool enable) |
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 | if (enable) |
| 118 | return dlfb_set_register(buf, 0x1F, 0x00); |
| 119 | else |
Bernie Thompson | 9825f70 | 2010-09-05 16:35:10 -0700 | [diff] [blame] | 120 | return dlfb_set_register(buf, 0x1F, 0x07); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 121 | } |
| 122 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 123 | static char *dlfb_set_color_depth(char *buf, u8 selection) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 124 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 125 | return dlfb_set_register(buf, 0x00, selection); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 126 | } |
| 127 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 128 | static char *dlfb_set_base16bpp(char *wrptr, u32 base) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 129 | { |
Bernie Thompson | 1d31a9e | 2010-02-15 06:45:43 -0800 | [diff] [blame] | 130 | /* the base pointer is 16 bits wide, 0x20 is hi byte. */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 131 | wrptr = dlfb_set_register(wrptr, 0x20, base >> 16); |
| 132 | wrptr = dlfb_set_register(wrptr, 0x21, base >> 8); |
| 133 | return dlfb_set_register(wrptr, 0x22, base); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 134 | } |
| 135 | |
Bernie Thompson | bd80816 | 2010-02-15 06:46:48 -0800 | [diff] [blame] | 136 | /* |
| 137 | * DisplayLink HW has separate 16bpp and 8bpp framebuffers. |
| 138 | * In 24bpp modes, the low 323 RGB bits go in the 8bpp framebuffer |
| 139 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 140 | static char *dlfb_set_base8bpp(char *wrptr, u32 base) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 141 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 142 | wrptr = dlfb_set_register(wrptr, 0x26, base >> 16); |
| 143 | wrptr = dlfb_set_register(wrptr, 0x27, base >> 8); |
| 144 | return dlfb_set_register(wrptr, 0x28, base); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 145 | } |
| 146 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 147 | static char *dlfb_set_register_16(char *wrptr, u8 reg, u16 value) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 148 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 149 | wrptr = dlfb_set_register(wrptr, reg, value >> 8); |
| 150 | return dlfb_set_register(wrptr, reg+1, value); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | /* |
| 154 | * This is kind of weird because the controller takes some |
| 155 | * register values in a different byte order than other registers. |
| 156 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 157 | static char *dlfb_set_register_16be(char *wrptr, u8 reg, u16 value) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 158 | { |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 159 | wrptr = dlfb_set_register(wrptr, reg, value); |
| 160 | return dlfb_set_register(wrptr, reg+1, value >> 8); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | /* |
| 164 | * LFSR is linear feedback shift register. The reason we have this is |
| 165 | * because the display controller needs to minimize the clock depth of |
| 166 | * various counters used in the display path. So this code reverses the |
| 167 | * provided value into the lfsr16 value by counting backwards to get |
| 168 | * the value that needs to be set in the hardware comparator to get the |
| 169 | * same actual count. This makes sense once you read above a couple of |
| 170 | * times and think about it from a hardware perspective. |
| 171 | */ |
Bernie Thompson | bd80816 | 2010-02-15 06:46:48 -0800 | [diff] [blame] | 172 | static u16 dlfb_lfsr16(u16 actual_count) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 173 | { |
| 174 | u32 lv = 0xFFFF; /* This is the lfsr value that the hw starts with */ |
| 175 | |
| 176 | while (actual_count--) { |
| 177 | lv = ((lv << 1) | |
| 178 | (((lv >> 15) ^ (lv >> 4) ^ (lv >> 2) ^ (lv >> 1)) & 1)) |
| 179 | & 0xFFFF; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 180 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 181 | |
| 182 | return (u16) lv; |
| 183 | } |
| 184 | |
| 185 | /* |
| 186 | * This does LFSR conversion on the value that is to be written. |
| 187 | * See LFSR explanation above for more detail. |
| 188 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 189 | static char *dlfb_set_register_lfsr16(char *wrptr, u8 reg, u16 value) |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 190 | { |
Bernie Thompson | bd80816 | 2010-02-15 06:46:48 -0800 | [diff] [blame] | 191 | return dlfb_set_register_16(wrptr, reg, dlfb_lfsr16(value)); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | /* |
| 195 | * This takes a standard fbdev screeninfo struct and all of its monitor mode |
| 196 | * details and converts them into the DisplayLink equivalent register commands. |
| 197 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 198 | 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] | 199 | { |
| 200 | u16 xds, yds; |
| 201 | u16 xde, yde; |
| 202 | u16 yec; |
| 203 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 204 | /* x display start */ |
| 205 | xds = var->left_margin + var->hsync_len; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 206 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x01, xds); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 207 | /* x display end */ |
| 208 | xde = xds + var->xres; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 209 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x03, xde); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 210 | |
| 211 | /* y display start */ |
| 212 | yds = var->upper_margin + var->vsync_len; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 213 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x05, yds); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 214 | /* y display end */ |
| 215 | yde = yds + var->yres; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 216 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x07, yde); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 217 | |
| 218 | /* x end count is active + blanking - 1 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 219 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x09, |
| 220 | xde + var->right_margin - 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 221 | |
| 222 | /* libdlo hardcodes hsync start to 1 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 223 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x0B, 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 224 | |
| 225 | /* hsync end is width of sync pulse + 1 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 226 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x0D, var->hsync_len + 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 227 | |
| 228 | /* hpixels is active pixels */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 229 | wrptr = dlfb_set_register_16(wrptr, 0x0F, var->xres); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 230 | |
| 231 | /* yendcount is vertical active + vertical blanking */ |
| 232 | yec = var->yres + var->upper_margin + var->lower_margin + |
| 233 | var->vsync_len; |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 234 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x11, yec); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 235 | |
| 236 | /* libdlo hardcodes vsync start to 0 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 237 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x13, 0); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 238 | |
| 239 | /* vsync end is width of vsync pulse */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 240 | wrptr = dlfb_set_register_lfsr16(wrptr, 0x15, var->vsync_len); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 241 | |
| 242 | /* vpixels is active pixels */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 243 | wrptr = dlfb_set_register_16(wrptr, 0x17, var->yres); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 244 | |
| 245 | /* convert picoseconds to 5kHz multiple for pclk5k = x * 1E12/5k */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 246 | wrptr = dlfb_set_register_16be(wrptr, 0x1B, |
| 247 | 200*1000*1000/var->pixclock); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 248 | |
| 249 | return wrptr; |
| 250 | } |
| 251 | |
| 252 | /* |
| 253 | * This takes a standard fbdev screeninfo struct that was fetched or prepared |
| 254 | * and then generates the appropriate command sequence that then drives the |
| 255 | * display controller. |
| 256 | */ |
| 257 | static int dlfb_set_video_mode(struct dlfb_data *dev, |
| 258 | struct fb_var_screeninfo *var) |
| 259 | { |
| 260 | char *buf; |
| 261 | char *wrptr; |
| 262 | int retval = 0; |
| 263 | int writesize; |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 264 | struct urb *urb; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 265 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 266 | if (!atomic_read(&dev->usb_active)) |
| 267 | return -EPERM; |
| 268 | |
| 269 | urb = dlfb_get_urb(dev); |
| 270 | if (!urb) |
| 271 | return -ENOMEM; |
| 272 | buf = (char *) urb->transfer_buffer; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 273 | |
| 274 | /* |
| 275 | * This first section has to do with setting the base address on the |
| 276 | * controller * associated with the display. There are 2 base |
| 277 | * pointers, currently, we only * use the 16 bpp segment. |
| 278 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 279 | wrptr = dlfb_vidreg_lock(buf); |
| 280 | wrptr = dlfb_set_color_depth(wrptr, 0x00); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 281 | /* set base for 16bpp segment to 0 */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 282 | wrptr = dlfb_set_base16bpp(wrptr, 0); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 283 | /* set base for 8bpp segment to end of fb */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 284 | wrptr = dlfb_set_base8bpp(wrptr, dev->info->fix.smem_len); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 285 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 286 | wrptr = dlfb_set_vid_cmds(wrptr, var); |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 287 | wrptr = dlfb_enable_hvsync(wrptr, true); |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 288 | wrptr = dlfb_vidreg_unlock(wrptr); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 289 | |
| 290 | writesize = wrptr - buf; |
| 291 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 292 | retval = dlfb_submit_urb(dev, urb, writesize); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 293 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 294 | return retval; |
| 295 | } |
| 296 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 297 | 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] | 298 | { |
| 299 | unsigned long start = vma->vm_start; |
| 300 | unsigned long size = vma->vm_end - vma->vm_start; |
| 301 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; |
| 302 | unsigned long page, pos; |
Bernie Thompson | bd80816 | 2010-02-15 06:46:48 -0800 | [diff] [blame] | 303 | struct dlfb_data *dev = info->par; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 304 | |
Bernie Thompson | bd80816 | 2010-02-15 06:46:48 -0800 | [diff] [blame] | 305 | 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] | 306 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 307 | if (offset + size > info->fix.smem_len) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 308 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 309 | |
| 310 | pos = (unsigned long)info->fix.smem_start + offset; |
| 311 | |
| 312 | while (size > 0) { |
| 313 | page = vmalloc_to_pfn((void *)pos); |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 314 | if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 315 | return -EAGAIN; |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 316 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 317 | start += PAGE_SIZE; |
| 318 | pos += PAGE_SIZE; |
| 319 | if (size > PAGE_SIZE) |
| 320 | size -= PAGE_SIZE; |
| 321 | else |
| 322 | size = 0; |
| 323 | } |
| 324 | |
| 325 | vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ |
| 326 | return 0; |
| 327 | |
| 328 | } |
| 329 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 330 | /* |
| 331 | * Trims identical data from front and back of line |
| 332 | * Sets new front buffer address and width |
| 333 | * And returns byte count of identical pixels |
| 334 | * Assumes CPU natural alignment (unsigned long) |
| 335 | * for back and front buffer ptrs and width |
| 336 | */ |
| 337 | 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] | 338 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 339 | int j, k; |
| 340 | const unsigned long *back = (const unsigned long *) bback; |
| 341 | const unsigned long *front = (const unsigned long *) *bfront; |
| 342 | const int width = *width_bytes / sizeof(unsigned long); |
| 343 | int identical = width; |
| 344 | int start = width; |
| 345 | int end = width; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 346 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 347 | prefetch((void *) front); |
| 348 | prefetch((void *) back); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 349 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 350 | for (j = 0; j < width; j++) { |
| 351 | if (back[j] != front[j]) { |
| 352 | start = j; |
| 353 | break; |
| 354 | } |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 355 | } |
| 356 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 357 | for (k = width - 1; k > j; k--) { |
| 358 | if (back[k] != front[k]) { |
| 359 | end = k+1; |
| 360 | break; |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | identical = start + (width - end); |
| 365 | *bfront = (u8 *) &front[start]; |
| 366 | *width_bytes = (end - start) * sizeof(unsigned long); |
| 367 | |
| 368 | return identical * sizeof(unsigned long); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 369 | } |
| 370 | |
| 371 | /* |
Pavel Machek | 3b7b31f | 2010-04-03 07:00:37 +0200 | [diff] [blame] | 372 | * Render a command stream for an encoded horizontal line segment of pixels. |
| 373 | * |
| 374 | * A command buffer holds several commands. |
| 375 | * It always begins with a fresh command header |
| 376 | * (the protocol doesn't require this, but we enforce it to allow |
| 377 | * multiple buffers to be potentially encoded and sent in parallel). |
| 378 | * A single command encodes one contiguous horizontal line of pixels |
| 379 | * |
| 380 | * The function relies on the client to do all allocation, so that |
| 381 | * rendering can be done directly to output buffers (e.g. USB URBs). |
| 382 | * The function fills the supplied command buffer, providing information |
| 383 | * on where it left off, so the client may call in again with additional |
| 384 | * buffers if the line will take several buffers to complete. |
| 385 | * |
| 386 | * A single command can transmit a maximum of 256 pixels, |
| 387 | * regardless of the compression ratio (protocol design limit). |
| 388 | * To the hardware, 0 for a size byte means 256 |
| 389 | * |
| 390 | * Rather than 256 pixel commands which are either rl or raw encoded, |
| 391 | * the rlx command simply assumes alternating raw and rl spans within one cmd. |
| 392 | * This has a slightly larger header overhead, but produces more even results. |
| 393 | * It also processes all data (read and write) in a single pass. |
| 394 | * Performance benchmarks of common cases show it having just slightly better |
| 395 | * compression than 256 pixel raw -or- rle commands, with similar CPU consumpion. |
| 396 | * But for very rl friendly data, will compress not quite as well. |
| 397 | */ |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 398 | static void dlfb_compress_hline( |
| 399 | const uint16_t **pixel_start_ptr, |
| 400 | const uint16_t *const pixel_end, |
| 401 | uint32_t *device_address_ptr, |
| 402 | uint8_t **command_buffer_ptr, |
| 403 | const uint8_t *const cmd_buffer_end) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 404 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 405 | const uint16_t *pixel = *pixel_start_ptr; |
| 406 | uint32_t dev_addr = *device_address_ptr; |
| 407 | uint8_t *cmd = *command_buffer_ptr; |
| 408 | const int bpp = 2; |
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_end > pixel) && |
| 411 | (cmd_buffer_end - MIN_RLX_CMD_BYTES > cmd)) { |
| 412 | uint8_t *raw_pixels_count_byte = 0; |
| 413 | uint8_t *cmd_pixels_count_byte = 0; |
| 414 | const uint16_t *raw_pixel_start = 0; |
| 415 | const uint16_t *cmd_pixel_start, *cmd_pixel_end = 0; |
| 416 | const uint32_t be_dev_addr = cpu_to_be32(dev_addr); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 417 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 418 | prefetchw((void *) cmd); /* pull in one cache line at least */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 419 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 420 | *cmd++ = 0xAF; |
| 421 | *cmd++ = 0x6B; |
| 422 | *cmd++ = (uint8_t) ((be_dev_addr >> 8) & 0xFF); |
| 423 | *cmd++ = (uint8_t) ((be_dev_addr >> 16) & 0xFF); |
| 424 | *cmd++ = (uint8_t) ((be_dev_addr >> 24) & 0xFF); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 425 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 426 | cmd_pixels_count_byte = cmd++; /* we'll know this later */ |
| 427 | cmd_pixel_start = pixel; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 428 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 429 | raw_pixels_count_byte = cmd++; /* we'll know this later */ |
| 430 | raw_pixel_start = pixel; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 431 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 432 | cmd_pixel_end = pixel + min(MAX_CMD_PIXELS + 1, |
| 433 | min((int)(pixel_end - pixel), |
| 434 | (int)(cmd_buffer_end - cmd) / bpp)); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 435 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 436 | prefetch_range((void *) pixel, (cmd_pixel_end - pixel) * bpp); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 437 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 438 | while (pixel < cmd_pixel_end) { |
| 439 | const uint16_t * const repeating_pixel = pixel; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 440 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 441 | *(uint16_t *)cmd = cpu_to_be16p(pixel); |
| 442 | cmd += 2; |
| 443 | pixel++; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 444 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 445 | if (unlikely((pixel < cmd_pixel_end) && |
| 446 | (*pixel == *repeating_pixel))) { |
| 447 | /* go back and fill in raw pixel count */ |
| 448 | *raw_pixels_count_byte = ((repeating_pixel - |
| 449 | raw_pixel_start) + 1) & 0xFF; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 450 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 451 | while ((pixel < cmd_pixel_end) |
| 452 | && (*pixel == *repeating_pixel)) { |
| 453 | pixel++; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 454 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 455 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 456 | /* immediately after raw data is repeat byte */ |
| 457 | *cmd++ = ((pixel - repeating_pixel) - 1) & 0xFF; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 458 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 459 | /* Then start another raw pixel span */ |
| 460 | raw_pixel_start = pixel; |
| 461 | raw_pixels_count_byte = cmd++; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 462 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 463 | } |
| 464 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 465 | if (pixel > raw_pixel_start) { |
| 466 | /* finalize last RAW span */ |
| 467 | *raw_pixels_count_byte = (pixel-raw_pixel_start) & 0xFF; |
| 468 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 469 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 470 | *cmd_pixels_count_byte = (pixel - cmd_pixel_start) & 0xFF; |
| 471 | dev_addr += (pixel - cmd_pixel_start) * bpp; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 472 | } |
| 473 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 474 | if (cmd_buffer_end <= MIN_RLX_CMD_BYTES + cmd) { |
| 475 | /* Fill leftover bytes with no-ops */ |
| 476 | if (cmd_buffer_end > cmd) |
| 477 | memset(cmd, 0xAF, cmd_buffer_end - cmd); |
| 478 | cmd = (uint8_t *) cmd_buffer_end; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 479 | } |
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 | *command_buffer_ptr = cmd; |
| 482 | *pixel_start_ptr = pixel; |
| 483 | *device_address_ptr = dev_addr; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 484 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 485 | return; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 486 | } |
| 487 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 488 | /* |
| 489 | * There are 3 copies of every pixel: The front buffer that the fbdev |
| 490 | * client renders to, the actual framebuffer across the USB bus in hardware |
| 491 | * (that we can only write to, slowly, and can never read), and (optionally) |
| 492 | * our shadow copy that tracks what's been sent to that hardware buffer. |
| 493 | */ |
| 494 | static void dlfb_render_hline(struct dlfb_data *dev, struct urb **urb_ptr, |
| 495 | const char *front, char **urb_buf_ptr, |
| 496 | u32 byte_offset, u32 byte_width, |
| 497 | int *ident_ptr, int *sent_ptr) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 498 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 499 | const u8 *line_start, *line_end, *next_pixel; |
| 500 | u32 dev_addr = dev->base16 + byte_offset; |
| 501 | struct urb *urb = *urb_ptr; |
| 502 | u8 *cmd = *urb_buf_ptr; |
| 503 | u8 *cmd_end = (u8 *) urb->transfer_buffer + urb->transfer_buffer_length; |
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 | line_start = (u8 *) (front + byte_offset); |
| 506 | next_pixel = line_start; |
| 507 | line_end = next_pixel + byte_width; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 508 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 509 | if (dev->backing_buffer) { |
| 510 | int offset; |
| 511 | const u8 *back_start = (u8 *) (dev->backing_buffer |
| 512 | + byte_offset); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 513 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 514 | *ident_ptr += dlfb_trim_hline(back_start, &next_pixel, |
| 515 | &byte_width); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 516 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 517 | offset = next_pixel - line_start; |
| 518 | line_end = next_pixel + byte_width; |
| 519 | dev_addr += offset; |
| 520 | back_start += offset; |
| 521 | line_start += offset; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 522 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 523 | memcpy((char *)back_start, (char *) line_start, |
| 524 | byte_width); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 525 | } |
| 526 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 527 | while (next_pixel < line_end) { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 528 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 529 | dlfb_compress_hline((const uint16_t **) &next_pixel, |
| 530 | (const uint16_t *) line_end, &dev_addr, |
| 531 | (u8 **) &cmd, (u8 *) cmd_end); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 532 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 533 | if (cmd >= cmd_end) { |
| 534 | int len = cmd - (u8 *) urb->transfer_buffer; |
| 535 | if (dlfb_submit_urb(dev, urb, len)) |
| 536 | return; /* lost pixels is set */ |
| 537 | *sent_ptr += len; |
| 538 | urb = dlfb_get_urb(dev); |
| 539 | if (!urb) |
| 540 | return; /* lost_pixels is set */ |
| 541 | *urb_ptr = urb; |
| 542 | cmd = urb->transfer_buffer; |
| 543 | cmd_end = &cmd[urb->transfer_buffer_length]; |
| 544 | } |
| 545 | } |
| 546 | |
| 547 | *urb_buf_ptr = cmd; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 548 | } |
| 549 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 550 | int dlfb_handle_damage(struct dlfb_data *dev, int x, int y, |
| 551 | int width, int height, char *data) |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 552 | { |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 553 | int i, ret; |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 554 | char *cmd; |
| 555 | cycles_t start_cycles, end_cycles; |
| 556 | int bytes_sent = 0; |
| 557 | int bytes_identical = 0; |
| 558 | struct urb *urb; |
| 559 | int aligned_x; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 560 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 561 | start_cycles = get_cycles(); |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 562 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 563 | aligned_x = DL_ALIGN_DOWN(x, sizeof(unsigned long)); |
| 564 | width = DL_ALIGN_UP(width + (x-aligned_x), sizeof(unsigned long)); |
| 565 | x = aligned_x; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 566 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 567 | if ((width <= 0) || |
| 568 | (x + width > dev->info->var.xres) || |
| 569 | (y + height > dev->info->var.yres)) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 570 | return -EINVAL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 571 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 572 | if (!atomic_read(&dev->usb_active)) |
| 573 | return 0; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 574 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 575 | urb = dlfb_get_urb(dev); |
| 576 | if (!urb) |
| 577 | return 0; |
| 578 | cmd = urb->transfer_buffer; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 579 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 580 | for (i = y; i < y + height ; i++) { |
| 581 | const int line_offset = dev->info->fix.line_length * i; |
| 582 | const int byte_offset = line_offset + (x * BPP); |
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 | dlfb_render_hline(dev, &urb, (char *) dev->info->fix.smem_start, |
| 585 | &cmd, byte_offset, width * BPP, |
| 586 | &bytes_identical, &bytes_sent); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 587 | } |
| 588 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 589 | if (cmd > (char *) urb->transfer_buffer) { |
| 590 | /* Send partial buffer remaining before exiting */ |
| 591 | int len = cmd - (char *) urb->transfer_buffer; |
| 592 | ret = dlfb_submit_urb(dev, urb, len); |
| 593 | bytes_sent += len; |
| 594 | } else |
| 595 | dlfb_urb_completion(urb); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 596 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 597 | atomic_add(bytes_sent, &dev->bytes_sent); |
| 598 | atomic_add(bytes_identical, &dev->bytes_identical); |
| 599 | atomic_add(width*height*2, &dev->bytes_rendered); |
| 600 | end_cycles = get_cycles(); |
| 601 | atomic_add(((unsigned int) ((end_cycles - start_cycles) |
| 602 | >> 10)), /* Kcycles */ |
| 603 | &dev->cpu_kcycles_used); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 604 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 605 | return 0; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 606 | } |
| 607 | |
Bernie Thompson | d46ecb9 | 2010-09-05 16:35:04 -0700 | [diff] [blame] | 608 | static ssize_t dlfb_ops_read(struct fb_info *info, char __user *buf, |
| 609 | size_t count, loff_t *ppos) |
| 610 | { |
| 611 | ssize_t result = -ENOSYS; |
| 612 | |
| 613 | #if defined CONFIG_FB_SYS_FOPS || defined CONFIG_FB_SYS_FOPS_MODULE |
| 614 | result = fb_sys_read(info, buf, count, ppos); |
| 615 | #endif |
| 616 | |
| 617 | return result; |
| 618 | } |
| 619 | |
| 620 | /* |
| 621 | * Path triggered by usermode clients who write to filesystem |
| 622 | * e.g. cat filename > /dev/fb1 |
| 623 | * Not used by X Windows or text-mode console. But useful for testing. |
| 624 | * Slow because of extra copy and we must assume all pixels dirty. |
| 625 | */ |
| 626 | static ssize_t dlfb_ops_write(struct fb_info *info, const char __user *buf, |
| 627 | size_t count, loff_t *ppos) |
| 628 | { |
| 629 | ssize_t result = -ENOSYS; |
| 630 | struct dlfb_data *dev = info->par; |
| 631 | u32 offset = (u32) *ppos; |
| 632 | |
| 633 | #if defined CONFIG_FB_SYS_FOPS || defined CONFIG_FB_SYS_FOPS_MODULE |
| 634 | |
| 635 | result = fb_sys_write(info, buf, count, ppos); |
| 636 | |
| 637 | if (result > 0) { |
| 638 | int start = max((int)(offset / info->fix.line_length) - 1, 0); |
| 639 | int lines = min((u32)((result / info->fix.line_length) + 1), |
| 640 | (u32)info->var.yres); |
| 641 | |
| 642 | dlfb_handle_damage(dev, 0, start, info->var.xres, |
| 643 | lines, info->screen_base); |
| 644 | } |
| 645 | #endif |
| 646 | |
| 647 | return result; |
| 648 | } |
| 649 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 650 | /* 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] | 651 | static void dlfb_ops_copyarea(struct fb_info *info, |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 652 | const struct fb_copyarea *area) |
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 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 655 | struct dlfb_data *dev = info->par; |
| 656 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 657 | #if defined CONFIG_FB_SYS_COPYAREA || defined CONFIG_FB_SYS_COPYAREA_MODULE |
| 658 | |
| 659 | sys_copyarea(info, area); |
| 660 | |
| 661 | dlfb_handle_damage(dev, area->dx, area->dy, |
| 662 | area->width, area->height, info->screen_base); |
| 663 | #endif |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 664 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 665 | } |
| 666 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 667 | static void dlfb_ops_imageblit(struct fb_info *info, |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 668 | const struct fb_image *image) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 669 | { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 670 | struct dlfb_data *dev = info->par; |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 671 | |
| 672 | #if defined CONFIG_FB_SYS_IMAGEBLIT || defined CONFIG_FB_SYS_IMAGEBLIT_MODULE |
| 673 | |
| 674 | sys_imageblit(info, image); |
| 675 | |
| 676 | dlfb_handle_damage(dev, image->dx, image->dy, |
| 677 | image->width, image->height, info->screen_base); |
| 678 | |
| 679 | #endif |
| 680 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 681 | } |
| 682 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 683 | static void dlfb_ops_fillrect(struct fb_info *info, |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 684 | const struct fb_fillrect *rect) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 685 | { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 686 | struct dlfb_data *dev = info->par; |
| 687 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 688 | #if defined CONFIG_FB_SYS_FILLRECT || defined CONFIG_FB_SYS_FILLRECT_MODULE |
| 689 | |
| 690 | sys_fillrect(info, rect); |
| 691 | |
| 692 | dlfb_handle_damage(dev, rect->dx, rect->dy, rect->width, |
| 693 | rect->height, info->screen_base); |
| 694 | #endif |
| 695 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 696 | } |
| 697 | |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 698 | static void dlfb_get_edid(struct dlfb_data *dev) |
| 699 | { |
| 700 | int i; |
| 701 | int ret; |
| 702 | char rbuf[2]; |
| 703 | |
| 704 | for (i = 0; i < sizeof(dev->edid); i++) { |
| 705 | ret = usb_control_msg(dev->udev, |
| 706 | usb_rcvctrlpipe(dev->udev, 0), (0x02), |
| 707 | (0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2, |
| 708 | 0); |
| 709 | dev->edid[i] = rbuf[1]; |
| 710 | } |
| 711 | } |
| 712 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 713 | static int dlfb_ops_ioctl(struct fb_info *info, unsigned int cmd, |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 714 | unsigned long arg) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 715 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 716 | |
| 717 | struct dlfb_data *dev = info->par; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 718 | struct dloarea *area = NULL; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 719 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 720 | if (!atomic_read(&dev->usb_active)) |
| 721 | return 0; |
| 722 | |
| 723 | /* TODO: Update X server to get this from sysfs instead */ |
| 724 | if (cmd == DLFB_IOCTL_RETURN_EDID) { |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 725 | char *edid = (char *)arg; |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 726 | dlfb_get_edid(dev); |
| 727 | if (copy_to_user(edid, dev->edid, sizeof(dev->edid))) |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 728 | return -EFAULT; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 729 | return 0; |
| 730 | } |
| 731 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 732 | /* TODO: Help propose a standard fb.h ioctl to report mmap damage */ |
| 733 | if (cmd == DLFB_IOCTL_REPORT_DAMAGE) { |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 734 | |
| 735 | area = (struct dloarea *)arg; |
| 736 | |
| 737 | if (area->x < 0) |
| 738 | area->x = 0; |
| 739 | |
| 740 | if (area->x > info->var.xres) |
| 741 | area->x = info->var.xres; |
| 742 | |
| 743 | if (area->y < 0) |
| 744 | area->y = 0; |
| 745 | |
| 746 | if (area->y > info->var.yres) |
| 747 | area->y = info->var.yres; |
| 748 | |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 749 | atomic_set(&dev->use_defio, 0); |
| 750 | |
| 751 | 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] | 752 | info->screen_base); |
| 753 | } |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 754 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 755 | return 0; |
| 756 | } |
| 757 | |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 758 | /* taken from vesafb */ |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 759 | static int |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 760 | dlfb_ops_setcolreg(unsigned regno, unsigned red, unsigned green, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 761 | unsigned blue, unsigned transp, struct fb_info *info) |
| 762 | { |
| 763 | int err = 0; |
| 764 | |
| 765 | if (regno >= info->cmap.len) |
| 766 | return 1; |
| 767 | |
| 768 | if (regno < 16) { |
| 769 | if (info->var.red.offset == 10) { |
| 770 | /* 1:5:5:5 */ |
| 771 | ((u32 *) (info->pseudo_palette))[regno] = |
| 772 | ((red & 0xf800) >> 1) | |
| 773 | ((green & 0xf800) >> 6) | ((blue & 0xf800) >> 11); |
| 774 | } else { |
| 775 | /* 0:5:6:5 */ |
| 776 | ((u32 *) (info->pseudo_palette))[regno] = |
| 777 | ((red & 0xf800)) | |
| 778 | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11); |
| 779 | } |
| 780 | } |
| 781 | |
| 782 | return err; |
| 783 | } |
| 784 | |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 785 | /* |
| 786 | * It's common for several clients to have framebuffer open simultaneously. |
| 787 | * e.g. both fbcon and X. Makes things interesting. |
| 788 | */ |
| 789 | static int dlfb_ops_open(struct fb_info *info, int user) |
| 790 | { |
| 791 | struct dlfb_data *dev = info->par; |
| 792 | |
| 793 | /* if (user == 0) |
| 794 | * We could special case kernel mode clients (fbcon) here |
| 795 | */ |
| 796 | |
| 797 | mutex_lock(&dev->fb_open_lock); |
| 798 | |
| 799 | dev->fb_count++; |
| 800 | |
| 801 | #ifdef CONFIG_FB_DEFERRED_IO |
| 802 | if ((atomic_read(&dev->use_defio)) && (info->fbdefio == NULL)) { |
| 803 | /* enable defio */ |
| 804 | info->fbdefio = &dlfb_defio; |
| 805 | fb_deferred_io_init(info); |
| 806 | } |
| 807 | #endif |
| 808 | |
| 809 | dl_notice("open /dev/fb%d user=%d fb_info=%p count=%d\n", |
| 810 | info->node, user, info, dev->fb_count); |
| 811 | |
| 812 | mutex_unlock(&dev->fb_open_lock); |
| 813 | |
| 814 | return 0; |
| 815 | } |
| 816 | |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 817 | static int dlfb_ops_release(struct fb_info *info, int user) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 818 | { |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 819 | struct dlfb_data *dev = info->par; |
| 820 | |
| 821 | mutex_lock(&dev->fb_open_lock); |
| 822 | |
| 823 | dev->fb_count--; |
| 824 | |
| 825 | #ifdef CONFIG_FB_DEFERRED_IO |
| 826 | if ((dev->fb_count == 0) && (info->fbdefio)) { |
| 827 | fb_deferred_io_cleanup(info); |
| 828 | info->fbdefio = NULL; |
| 829 | info->fbops->fb_mmap = dlfb_ops_mmap; |
| 830 | } |
| 831 | #endif |
| 832 | |
| 833 | dl_notice("release /dev/fb%d user=%d count=%d\n", |
| 834 | info->node, user, dev->fb_count); |
| 835 | |
| 836 | mutex_unlock(&dev->fb_open_lock); |
| 837 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 838 | return 0; |
| 839 | } |
| 840 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 841 | /* |
| 842 | * Called when all client interfaces to start transactions have been disabled, |
| 843 | * and all references to our device instance (dlfb_data) are released. |
| 844 | * Every transaction must have a reference, so we know are fully spun down |
| 845 | */ |
| 846 | static void dlfb_delete(struct kref *kref) |
| 847 | { |
| 848 | struct dlfb_data *dev = container_of(kref, struct dlfb_data, kref); |
| 849 | |
| 850 | if (dev->backing_buffer) |
| 851 | vfree(dev->backing_buffer); |
| 852 | |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 853 | mutex_destroy(&dev->fb_open_lock); |
| 854 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 855 | kfree(dev); |
| 856 | } |
| 857 | |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 858 | /* |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 859 | * Called by fbdev as last part of unregister_framebuffer() process |
| 860 | * No new clients can open connections. Deallocate everything fb_info. |
| 861 | */ |
| 862 | static void dlfb_ops_destroy(struct fb_info *info) |
| 863 | { |
| 864 | struct dlfb_data *dev = info->par; |
| 865 | |
| 866 | if (info->cmap.len != 0) |
| 867 | fb_dealloc_cmap(&info->cmap); |
| 868 | if (info->monspecs.modedb) |
| 869 | fb_destroy_modedb(info->monspecs.modedb); |
| 870 | if (info->screen_base) |
| 871 | vfree(info->screen_base); |
| 872 | |
| 873 | fb_destroy_modelist(&info->modelist); |
| 874 | |
| 875 | framebuffer_release(info); |
| 876 | |
| 877 | /* ref taken before register_framebuffer() for dlfb_data clients */ |
| 878 | kref_put(&dev->kref, dlfb_delete); |
| 879 | } |
| 880 | |
| 881 | /* |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 882 | * Check whether a video mode is supported by the DisplayLink chip |
| 883 | * We start from monitor's modes, so don't need to filter that here |
| 884 | */ |
| 885 | static int dlfb_is_valid_mode(struct fb_videomode *mode, |
| 886 | struct fb_info *info) |
| 887 | { |
| 888 | struct dlfb_data *dev = info->par; |
| 889 | |
| 890 | if (mode->xres * mode->yres > dev->sku_pixel_limit) |
| 891 | return 0; |
| 892 | |
| 893 | return 1; |
| 894 | } |
| 895 | |
| 896 | static void dlfb_var_color_format(struct fb_var_screeninfo *var) |
| 897 | { |
| 898 | const struct fb_bitfield red = { 11, 5, 0 }; |
| 899 | const struct fb_bitfield green = { 5, 6, 0 }; |
| 900 | const struct fb_bitfield blue = { 0, 5, 0 }; |
| 901 | |
| 902 | var->bits_per_pixel = 16; |
| 903 | var->red = red; |
| 904 | var->green = green; |
| 905 | var->blue = blue; |
| 906 | } |
| 907 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 908 | static int dlfb_ops_check_var(struct fb_var_screeninfo *var, |
| 909 | struct fb_info *info) |
| 910 | { |
| 911 | struct fb_videomode mode; |
| 912 | |
| 913 | /* TODO: support dynamically changing framebuffer size */ |
| 914 | if ((var->xres * var->yres * 2) > info->fix.smem_len) |
| 915 | return -EINVAL; |
| 916 | |
| 917 | /* set device-specific elements of var unrelated to mode */ |
| 918 | dlfb_var_color_format(var); |
| 919 | |
| 920 | fb_var_to_videomode(&mode, var); |
| 921 | |
| 922 | if (!dlfb_is_valid_mode(&mode, info)) |
| 923 | return -EINVAL; |
| 924 | |
| 925 | return 0; |
| 926 | } |
| 927 | |
| 928 | static int dlfb_ops_set_par(struct fb_info *info) |
| 929 | { |
| 930 | struct dlfb_data *dev = info->par; |
| 931 | |
| 932 | dl_notice("set_par mode %dx%d\n", info->var.xres, info->var.yres); |
| 933 | |
| 934 | return dlfb_set_video_mode(dev, &info->var); |
| 935 | } |
| 936 | |
Bernie Thompson | 9825f70 | 2010-09-05 16:35:10 -0700 | [diff] [blame] | 937 | /* |
| 938 | * In order to come back from full DPMS off, we need to set the mode again |
| 939 | */ |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 940 | 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] | 941 | { |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 942 | struct dlfb_data *dev = info->par; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 943 | |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 944 | if (blank_mode != FB_BLANK_UNBLANK) { |
Bernie Thompson | 9825f70 | 2010-09-05 16:35:10 -0700 | [diff] [blame] | 945 | char *bufptr; |
| 946 | struct urb *urb; |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 947 | |
Bernie Thompson | 9825f70 | 2010-09-05 16:35:10 -0700 | [diff] [blame] | 948 | urb = dlfb_get_urb(dev); |
| 949 | if (!urb) |
| 950 | return 0; |
| 951 | |
| 952 | bufptr = (char *) urb->transfer_buffer; |
| 953 | bufptr = dlfb_vidreg_lock(bufptr); |
| 954 | bufptr = dlfb_enable_hvsync(bufptr, false); |
| 955 | bufptr = dlfb_vidreg_unlock(bufptr); |
| 956 | |
| 957 | dlfb_submit_urb(dev, urb, bufptr - |
| 958 | (char *) urb->transfer_buffer); |
| 959 | } else { |
| 960 | dlfb_set_video_mode(dev, &info->var); |
| 961 | } |
Roberto De Ioris | 7316bc5 | 2009-06-10 23:02:19 -0700 | [diff] [blame] | 962 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 963 | return 0; |
| 964 | } |
| 965 | |
| 966 | static struct fb_ops dlfb_ops = { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 967 | .owner = THIS_MODULE, |
Bernie Thompson | d46ecb9 | 2010-09-05 16:35:04 -0700 | [diff] [blame] | 968 | .fb_read = dlfb_ops_read, |
| 969 | .fb_write = dlfb_ops_write, |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 970 | .fb_setcolreg = dlfb_ops_setcolreg, |
| 971 | .fb_fillrect = dlfb_ops_fillrect, |
| 972 | .fb_copyarea = dlfb_ops_copyarea, |
| 973 | .fb_imageblit = dlfb_ops_imageblit, |
| 974 | .fb_mmap = dlfb_ops_mmap, |
| 975 | .fb_ioctl = dlfb_ops_ioctl, |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 976 | .fb_open = dlfb_ops_open, |
Bernie Thompson | 4574203 | 2010-02-15 06:46:04 -0800 | [diff] [blame] | 977 | .fb_release = dlfb_ops_release, |
| 978 | .fb_blank = dlfb_ops_blank, |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 979 | .fb_check_var = dlfb_ops_check_var, |
| 980 | .fb_set_par = dlfb_ops_set_par, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 981 | }; |
| 982 | |
Bernie Thompson | cc403dc | 2010-02-15 06:45:49 -0800 | [diff] [blame] | 983 | /* |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 984 | * Calls dlfb_get_edid() to query the EDID of attached monitor via usb cmds |
| 985 | * Then parses EDID into three places used by various parts of fbdev: |
| 986 | * fb_var_screeninfo contains the timing of the monitor's preferred mode |
| 987 | * fb_info.monspecs is full parsed EDID info, including monspecs.modedb |
| 988 | * fb_info.modelist is a linked list of all monitor & VESA modes which work |
| 989 | * |
| 990 | * If EDID is not readable/valid, then modelist is all VESA modes, |
| 991 | * monspecs is NULL, and fb_var_screeninfo is set to safe VESA mode |
| 992 | * Returns 0 if EDID parses successfully |
| 993 | */ |
| 994 | static int dlfb_parse_edid(struct dlfb_data *dev, |
| 995 | struct fb_var_screeninfo *var, |
| 996 | struct fb_info *info) |
| 997 | { |
| 998 | int i; |
| 999 | const struct fb_videomode *default_vmode = NULL; |
| 1000 | int result = 0; |
| 1001 | |
| 1002 | fb_destroy_modelist(&info->modelist); |
| 1003 | memset(&info->monspecs, 0, sizeof(info->monspecs)); |
| 1004 | |
| 1005 | dlfb_get_edid(dev); |
| 1006 | fb_edid_to_monspecs(dev->edid, &info->monspecs); |
| 1007 | |
| 1008 | if (info->monspecs.modedb_len > 0) { |
| 1009 | |
| 1010 | for (i = 0; i < info->monspecs.modedb_len; i++) { |
| 1011 | if (dlfb_is_valid_mode(&info->monspecs.modedb[i], info)) |
| 1012 | fb_add_videomode(&info->monspecs.modedb[i], |
| 1013 | &info->modelist); |
| 1014 | } |
| 1015 | |
| 1016 | default_vmode = fb_find_best_display(&info->monspecs, |
| 1017 | &info->modelist); |
| 1018 | } else { |
| 1019 | struct fb_videomode fb_vmode = {0}; |
| 1020 | |
| 1021 | dl_err("Unable to get valid EDID from device/display\n"); |
| 1022 | result = 1; |
| 1023 | |
| 1024 | /* |
| 1025 | * Add the standard VESA modes to our modelist |
| 1026 | * Since we don't have EDID, there may be modes that |
| 1027 | * overspec monitor and/or are incorrect aspect ratio, etc. |
| 1028 | * But at least the user has a chance to choose |
| 1029 | */ |
| 1030 | for (i = 0; i < VESA_MODEDB_SIZE; i++) { |
| 1031 | if (dlfb_is_valid_mode((struct fb_videomode *) |
| 1032 | &vesa_modes[i], info)) |
| 1033 | fb_add_videomode(&vesa_modes[i], |
| 1034 | &info->modelist); |
| 1035 | } |
| 1036 | |
| 1037 | /* |
| 1038 | * default to resolution safe for projectors |
| 1039 | * (since they are most common case without EDID) |
| 1040 | */ |
| 1041 | fb_vmode.xres = 800; |
| 1042 | fb_vmode.yres = 600; |
| 1043 | fb_vmode.refresh = 60; |
| 1044 | default_vmode = fb_find_nearest_mode(&fb_vmode, |
| 1045 | &info->modelist); |
| 1046 | } |
| 1047 | |
| 1048 | fb_videomode_to_var(var, default_vmode); |
| 1049 | dlfb_var_color_format(var); |
| 1050 | |
| 1051 | return result; |
| 1052 | } |
| 1053 | |
| 1054 | static ssize_t metrics_bytes_rendered_show(struct device *fbdev, |
| 1055 | struct device_attribute *a, char *buf) { |
| 1056 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1057 | struct dlfb_data *dev = fb_info->par; |
| 1058 | return snprintf(buf, PAGE_SIZE, "%u\n", |
| 1059 | atomic_read(&dev->bytes_rendered)); |
| 1060 | } |
| 1061 | |
| 1062 | static ssize_t metrics_bytes_identical_show(struct device *fbdev, |
| 1063 | struct device_attribute *a, char *buf) { |
| 1064 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1065 | struct dlfb_data *dev = fb_info->par; |
| 1066 | return snprintf(buf, PAGE_SIZE, "%u\n", |
| 1067 | atomic_read(&dev->bytes_identical)); |
| 1068 | } |
| 1069 | |
| 1070 | static ssize_t metrics_bytes_sent_show(struct device *fbdev, |
| 1071 | struct device_attribute *a, char *buf) { |
| 1072 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1073 | struct dlfb_data *dev = fb_info->par; |
| 1074 | return snprintf(buf, PAGE_SIZE, "%u\n", |
| 1075 | atomic_read(&dev->bytes_sent)); |
| 1076 | } |
| 1077 | |
| 1078 | static ssize_t metrics_cpu_kcycles_used_show(struct device *fbdev, |
| 1079 | struct device_attribute *a, char *buf) { |
| 1080 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1081 | struct dlfb_data *dev = fb_info->par; |
| 1082 | return snprintf(buf, PAGE_SIZE, "%u\n", |
| 1083 | atomic_read(&dev->cpu_kcycles_used)); |
| 1084 | } |
| 1085 | |
Chris Wright | 2c3c8be | 2010-05-12 18:28:57 -0700 | [diff] [blame] | 1086 | static ssize_t edid_show(struct file *filp, struct kobject *kobj, |
| 1087 | struct bin_attribute *a, |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 1088 | char *buf, loff_t off, size_t count) { |
| 1089 | struct device *fbdev = container_of(kobj, struct device, kobj); |
| 1090 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1091 | struct dlfb_data *dev = fb_info->par; |
| 1092 | char *edid = &dev->edid[0]; |
| 1093 | const size_t size = sizeof(dev->edid); |
| 1094 | |
| 1095 | if (dlfb_parse_edid(dev, &fb_info->var, fb_info)) |
| 1096 | return 0; |
| 1097 | |
| 1098 | if (off >= size) |
| 1099 | return 0; |
| 1100 | |
| 1101 | if (off + count > size) |
| 1102 | count = size - off; |
| 1103 | memcpy(buf, edid + off, count); |
| 1104 | |
| 1105 | return count; |
| 1106 | } |
| 1107 | |
| 1108 | |
| 1109 | static ssize_t metrics_reset_store(struct device *fbdev, |
| 1110 | struct device_attribute *attr, |
| 1111 | const char *buf, size_t count) |
| 1112 | { |
| 1113 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1114 | struct dlfb_data *dev = fb_info->par; |
| 1115 | |
| 1116 | atomic_set(&dev->bytes_rendered, 0); |
| 1117 | atomic_set(&dev->bytes_identical, 0); |
| 1118 | atomic_set(&dev->bytes_sent, 0); |
| 1119 | atomic_set(&dev->cpu_kcycles_used, 0); |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 1120 | |
| 1121 | return count; |
| 1122 | } |
| 1123 | |
| 1124 | static ssize_t use_defio_show(struct device *fbdev, |
| 1125 | struct device_attribute *a, char *buf) { |
| 1126 | struct fb_info *fb_info = dev_get_drvdata(fbdev); |
| 1127 | struct dlfb_data *dev = fb_info->par; |
| 1128 | return snprintf(buf, PAGE_SIZE, "%d\n", |
| 1129 | atomic_read(&dev->use_defio)); |
| 1130 | } |
| 1131 | |
| 1132 | static ssize_t use_defio_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 | if (count > 0) { |
| 1140 | if (buf[0] == '0') |
| 1141 | atomic_set(&dev->use_defio, 0); |
| 1142 | if (buf[0] == '1') |
| 1143 | atomic_set(&dev->use_defio, 1); |
| 1144 | } |
| 1145 | return count; |
| 1146 | } |
| 1147 | |
| 1148 | static struct bin_attribute edid_attr = { |
| 1149 | .attr.name = "edid", |
| 1150 | .attr.mode = 0444, |
| 1151 | .size = 128, |
| 1152 | .read = edid_show, |
| 1153 | }; |
| 1154 | |
| 1155 | static struct device_attribute fb_device_attrs[] = { |
| 1156 | __ATTR_RO(metrics_bytes_rendered), |
| 1157 | __ATTR_RO(metrics_bytes_identical), |
| 1158 | __ATTR_RO(metrics_bytes_sent), |
| 1159 | __ATTR_RO(metrics_cpu_kcycles_used), |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 1160 | __ATTR(metrics_reset, S_IWUGO, NULL, metrics_reset_store), |
| 1161 | __ATTR_RW(use_defio), |
| 1162 | }; |
| 1163 | |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 1164 | #ifdef CONFIG_FB_DEFERRED_IO |
| 1165 | static void dlfb_dpy_deferred_io(struct fb_info *info, |
| 1166 | struct list_head *pagelist) |
| 1167 | { |
| 1168 | struct page *cur; |
| 1169 | struct fb_deferred_io *fbdefio = info->fbdefio; |
| 1170 | struct dlfb_data *dev = info->par; |
| 1171 | struct urb *urb; |
| 1172 | char *cmd; |
| 1173 | cycles_t start_cycles, end_cycles; |
| 1174 | int bytes_sent = 0; |
| 1175 | int bytes_identical = 0; |
| 1176 | int bytes_rendered = 0; |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 1177 | |
| 1178 | if (!atomic_read(&dev->use_defio)) |
| 1179 | return; |
| 1180 | |
| 1181 | if (!atomic_read(&dev->usb_active)) |
| 1182 | return; |
| 1183 | |
| 1184 | start_cycles = get_cycles(); |
| 1185 | |
| 1186 | urb = dlfb_get_urb(dev); |
| 1187 | if (!urb) |
| 1188 | return; |
| 1189 | cmd = urb->transfer_buffer; |
| 1190 | |
| 1191 | /* walk the written page list and render each to device */ |
| 1192 | list_for_each_entry(cur, &fbdefio->pagelist, lru) { |
| 1193 | dlfb_render_hline(dev, &urb, (char *) info->fix.smem_start, |
| 1194 | &cmd, cur->index << PAGE_SHIFT, |
| 1195 | PAGE_SIZE, &bytes_identical, &bytes_sent); |
| 1196 | bytes_rendered += PAGE_SIZE; |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 1197 | } |
| 1198 | |
| 1199 | if (cmd > (char *) urb->transfer_buffer) { |
| 1200 | /* Send partial buffer remaining before exiting */ |
| 1201 | int len = cmd - (char *) urb->transfer_buffer; |
| 1202 | dlfb_submit_urb(dev, urb, len); |
| 1203 | bytes_sent += len; |
| 1204 | } else |
| 1205 | dlfb_urb_completion(urb); |
| 1206 | |
Bernie Thompson | 3e8f3d6 | 2010-02-15 06:46:26 -0800 | [diff] [blame] | 1207 | atomic_add(bytes_sent, &dev->bytes_sent); |
| 1208 | atomic_add(bytes_identical, &dev->bytes_identical); |
| 1209 | atomic_add(bytes_rendered, &dev->bytes_rendered); |
| 1210 | end_cycles = get_cycles(); |
| 1211 | atomic_add(((unsigned int) ((end_cycles - start_cycles) |
| 1212 | >> 10)), /* Kcycles */ |
| 1213 | &dev->cpu_kcycles_used); |
| 1214 | } |
| 1215 | |
| 1216 | static struct fb_deferred_io dlfb_defio = { |
| 1217 | .delay = 5, |
| 1218 | .deferred_io = dlfb_dpy_deferred_io, |
| 1219 | }; |
| 1220 | |
| 1221 | #endif |
| 1222 | |
Bernie Thompson | 7d9485e | 2010-02-15 06:46:08 -0800 | [diff] [blame] | 1223 | /* |
Bernie Thompson | cc403dc | 2010-02-15 06:45:49 -0800 | [diff] [blame] | 1224 | * This is necessary before we can communicate with the display controller. |
| 1225 | */ |
| 1226 | static int dlfb_select_std_channel(struct dlfb_data *dev) |
| 1227 | { |
| 1228 | int ret; |
| 1229 | u8 set_def_chn[] = { 0x57, 0xCD, 0xDC, 0xA7, |
| 1230 | 0x1C, 0x88, 0x5E, 0x15, |
| 1231 | 0x60, 0xFE, 0xC6, 0x97, |
| 1232 | 0x16, 0x3D, 0x47, 0xF2 }; |
| 1233 | |
| 1234 | ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), |
| 1235 | NR_USB_REQUEST_CHANNEL, |
| 1236 | (USB_DIR_OUT | USB_TYPE_VENDOR), 0, 0, |
| 1237 | set_def_chn, sizeof(set_def_chn), USB_CTRL_SET_TIMEOUT); |
| 1238 | return ret; |
| 1239 | } |
| 1240 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1241 | |
| 1242 | static int dlfb_usb_probe(struct usb_interface *interface, |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1243 | const struct usb_device_id *id) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1244 | { |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1245 | struct usb_device *usbdev; |
| 1246 | struct dlfb_data *dev; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1247 | struct fb_info *info; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1248 | int videomemorysize; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1249 | int i; |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1250 | unsigned char *videomemory; |
| 1251 | int retval = -ENOMEM; |
| 1252 | struct fb_var_screeninfo *var; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1253 | int registered = 0; |
| 1254 | u16 *pix_framebuffer; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1255 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1256 | /* usb initialization */ |
| 1257 | |
| 1258 | usbdev = interface_to_usbdev(interface); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1259 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1260 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 1261 | if (dev == NULL) { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1262 | err("dlfb_usb_probe: failed alloc of dev struct\n"); |
| 1263 | goto error; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1264 | } |
| 1265 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1266 | /* we need to wait for both usb and fbdev to spin down on disconnect */ |
| 1267 | kref_init(&dev->kref); /* matching kref_put in usb .disconnect fn */ |
| 1268 | kref_get(&dev->kref); /* matching kref_put in .fb_destroy function*/ |
| 1269 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1270 | dev->udev = usbdev; |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1271 | dev->gdev = &usbdev->dev; /* our generic struct device * */ |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1272 | usb_set_intfdata(interface, dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1273 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1274 | if (!dlfb_alloc_urb_list(dev, WRITES_IN_FLIGHT, MAX_TRANSFER)) { |
| 1275 | retval = -ENOMEM; |
| 1276 | dl_err("dlfb_alloc_urb_list failed\n"); |
| 1277 | goto error; |
| 1278 | } |
| 1279 | |
| 1280 | mutex_init(&dev->fb_open_lock); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1281 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1282 | /* 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] | 1283 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1284 | /* allocates framebuffer driver structure, not framebuffer memory */ |
| 1285 | info = framebuffer_alloc(0, &usbdev->dev); |
| 1286 | if (!info) { |
| 1287 | retval = -ENOMEM; |
| 1288 | dl_err("framebuffer_alloc failed\n"); |
| 1289 | goto error; |
| 1290 | } |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1291 | dev->info = info; |
| 1292 | info->par = dev; |
| 1293 | info->pseudo_palette = dev->pseudo_palette; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1294 | info->fbops = &dlfb_ops; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1295 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1296 | var = &info->var; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1297 | |
| 1298 | /* TODO set limit based on actual SKU detection */ |
| 1299 | dev->sku_pixel_limit = 2048 * 1152; |
| 1300 | |
| 1301 | INIT_LIST_HEAD(&info->modelist); |
| 1302 | dlfb_parse_edid(dev, var, info); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1303 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1304 | /* |
| 1305 | * 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] | 1306 | */ |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1307 | info->fix = dlfb_fix; |
| 1308 | info->fix.line_length = var->xres * (var->bits_per_pixel / 8); |
| 1309 | videomemorysize = info->fix.line_length * var->yres; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1310 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1311 | /* |
| 1312 | * The big chunk of system memory we use as a virtual framebuffer. |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1313 | * TODO: Handle fbcon cursor code calling blit in interrupt context |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1314 | */ |
| 1315 | videomemory = vmalloc(videomemorysize); |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1316 | if (!videomemory) { |
| 1317 | retval = -ENOMEM; |
| 1318 | dl_err("Virtual framebuffer alloc failed\n"); |
| 1319 | goto error; |
| 1320 | } |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1321 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1322 | info->screen_base = videomemory; |
| 1323 | info->fix.smem_len = PAGE_ALIGN(videomemorysize); |
| 1324 | info->fix.smem_start = (unsigned long) videomemory; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1325 | info->flags = udlfb_info_flags; |
| 1326 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1327 | |
| 1328 | /* |
| 1329 | * Second framebuffer copy, mirroring the state of the framebuffer |
| 1330 | * on the physical USB device. We can function without this. |
| 1331 | * But with imperfect damage info we may end up sending pixels over USB |
| 1332 | * that were, in fact, unchanged -- wasting limited USB bandwidth |
| 1333 | */ |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1334 | dev->backing_buffer = vmalloc(videomemorysize); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1335 | if (!dev->backing_buffer) |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1336 | dl_warn("No shadow/backing buffer allcoated\n"); |
| 1337 | else |
| 1338 | memset(dev->backing_buffer, 0, videomemorysize); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1339 | |
| 1340 | retval = fb_alloc_cmap(&info->cmap, 256, 0); |
| 1341 | if (retval < 0) { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1342 | dl_err("fb_alloc_cmap failed %x\n", retval); |
| 1343 | goto error; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1344 | } |
| 1345 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1346 | /* ready to begin using device */ |
| 1347 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1348 | #ifdef CONFIG_FB_DEFERRED_IO |
| 1349 | atomic_set(&dev->use_defio, 1); |
| 1350 | #endif |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1351 | atomic_set(&dev->usb_active, 1); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1352 | dlfb_select_std_channel(dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1353 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1354 | dlfb_ops_check_var(var, info); |
| 1355 | dlfb_ops_set_par(info); |
| 1356 | |
| 1357 | /* paint greenscreen */ |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1358 | pix_framebuffer = (u16 *) videomemory; |
| 1359 | for (i = 0; i < videomemorysize / 2; i++) |
| 1360 | pix_framebuffer[i] = 0x37e6; |
| 1361 | |
| 1362 | dlfb_handle_damage(dev, 0, 0, info->var.xres, info->var.yres, |
| 1363 | videomemory); |
Bernie Thompson | 530f43a | 2010-02-15 06:46:21 -0800 | [diff] [blame] | 1364 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1365 | retval = register_framebuffer(info); |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1366 | if (retval < 0) { |
| 1367 | dl_err("register_framebuffer failed %d\n", retval); |
| 1368 | goto error; |
| 1369 | } |
| 1370 | registered = 1; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1371 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1372 | for (i = 0; i < ARRAY_SIZE(fb_device_attrs); i++) |
| 1373 | device_create_file(info->dev, &fb_device_attrs[i]); |
Greg Kroah-Hartman | f05e057 | 2009-06-03 14:47:08 -0700 | [diff] [blame] | 1374 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1375 | device_create_bin_file(info->dev, &edid_attr); |
| 1376 | |
| 1377 | dl_err("DisplayLink USB device /dev/fb%d attached. %dx%d resolution." |
| 1378 | " Using %dK framebuffer memory\n", info->node, |
| 1379 | var->xres, var->yres, |
| 1380 | ((dev->backing_buffer) ? |
| 1381 | videomemorysize * 2 : videomemorysize) >> 10); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1382 | return 0; |
| 1383 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1384 | error: |
| 1385 | if (dev) { |
| 1386 | if (registered) { |
| 1387 | unregister_framebuffer(info); |
| 1388 | dlfb_ops_destroy(info); |
| 1389 | } else |
| 1390 | kref_put(&dev->kref, dlfb_delete); |
| 1391 | |
| 1392 | if (dev->urbs.count > 0) |
| 1393 | dlfb_free_urb_list(dev); |
| 1394 | kref_put(&dev->kref, dlfb_delete); /* last ref from kref_init */ |
| 1395 | |
| 1396 | /* dev has been deallocated. Do not dereference */ |
| 1397 | } |
| 1398 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1399 | return retval; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1400 | } |
| 1401 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1402 | static void dlfb_usb_disconnect(struct usb_interface *interface) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1403 | { |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1404 | struct dlfb_data *dev; |
| 1405 | struct fb_info *info; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1406 | int i; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1407 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1408 | dev = usb_get_intfdata(interface); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1409 | info = dev->info; |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1410 | |
| 1411 | /* when non-active we'll update virtual framebuffer, but no new urbs */ |
| 1412 | atomic_set(&dev->usb_active, 0); |
| 1413 | |
| 1414 | usb_set_intfdata(interface, NULL); |
| 1415 | |
| 1416 | for (i = 0; i < ARRAY_SIZE(fb_device_attrs); i++) |
| 1417 | device_remove_file(info->dev, &fb_device_attrs[i]); |
| 1418 | |
| 1419 | device_remove_bin_file(info->dev, &edid_attr); |
| 1420 | |
| 1421 | /* this function will wait for all in-flight urbs to complete */ |
| 1422 | dlfb_free_urb_list(dev); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1423 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1424 | if (info) { |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1425 | dl_notice("Detaching /dev/fb%d\n", info->node); |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1426 | unregister_framebuffer(info); |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1427 | dlfb_ops_destroy(info); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1428 | } |
| 1429 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1430 | /* release reference taken by kref_init in probe() */ |
| 1431 | kref_put(&dev->kref, dlfb_delete); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1432 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1433 | /* consider dlfb_data freed */ |
| 1434 | |
| 1435 | return; |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1436 | } |
| 1437 | |
| 1438 | static struct usb_driver dlfb_driver = { |
| 1439 | .name = "udlfb", |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1440 | .probe = dlfb_usb_probe, |
| 1441 | .disconnect = dlfb_usb_disconnect, |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1442 | .id_table = id_table, |
| 1443 | }; |
| 1444 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1445 | static int __init dlfb_module_init(void) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1446 | { |
| 1447 | int res; |
| 1448 | |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1449 | res = usb_register(&dlfb_driver); |
| 1450 | if (res) |
| 1451 | err("usb_register failed. Error number %d", res); |
| 1452 | |
Soeren Moeller | b5a2104 | 2010-05-14 19:03:00 +0000 | [diff] [blame] | 1453 | printk(KERN_INFO "VMODES initialized\n"); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1454 | |
| 1455 | return res; |
| 1456 | } |
| 1457 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1458 | static void __exit dlfb_module_exit(void) |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1459 | { |
| 1460 | usb_deregister(&dlfb_driver); |
| 1461 | } |
| 1462 | |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1463 | module_init(dlfb_module_init); |
| 1464 | module_exit(dlfb_module_exit); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1465 | |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1466 | static void dlfb_urb_completion(struct urb *urb) |
| 1467 | { |
| 1468 | struct urb_node *unode = urb->context; |
| 1469 | struct dlfb_data *dev = unode->dev; |
| 1470 | unsigned long flags; |
| 1471 | |
| 1472 | /* sync/async unlink faults aren't errors */ |
| 1473 | if (urb->status) { |
| 1474 | if (!(urb->status == -ENOENT || |
| 1475 | urb->status == -ECONNRESET || |
| 1476 | urb->status == -ESHUTDOWN)) { |
| 1477 | dl_err("%s - nonzero write bulk status received: %d\n", |
| 1478 | __func__, urb->status); |
| 1479 | atomic_set(&dev->lost_pixels, 1); |
| 1480 | } |
| 1481 | } |
| 1482 | |
| 1483 | urb->transfer_buffer_length = dev->urbs.size; /* reset to actual */ |
| 1484 | |
| 1485 | spin_lock_irqsave(&dev->urbs.lock, flags); |
| 1486 | list_add_tail(&unode->entry, &dev->urbs.list); |
| 1487 | dev->urbs.available++; |
| 1488 | spin_unlock_irqrestore(&dev->urbs.lock, flags); |
| 1489 | |
| 1490 | up(&dev->urbs.limit_sem); |
| 1491 | } |
| 1492 | |
| 1493 | static void dlfb_free_urb_list(struct dlfb_data *dev) |
| 1494 | { |
| 1495 | int count = dev->urbs.count; |
| 1496 | struct list_head *node; |
| 1497 | struct urb_node *unode; |
| 1498 | struct urb *urb; |
| 1499 | int ret; |
| 1500 | unsigned long flags; |
| 1501 | |
| 1502 | dl_notice("Waiting for completes and freeing all render urbs\n"); |
| 1503 | |
| 1504 | /* keep waiting and freeing, until we've got 'em all */ |
| 1505 | while (count--) { |
| 1506 | /* Timeout means a memory leak and/or fault */ |
| 1507 | ret = down_timeout(&dev->urbs.limit_sem, FREE_URB_TIMEOUT); |
| 1508 | if (ret) { |
| 1509 | BUG_ON(ret); |
| 1510 | break; |
| 1511 | } |
| 1512 | spin_lock_irqsave(&dev->urbs.lock, flags); |
| 1513 | |
| 1514 | node = dev->urbs.list.next; /* have reserved one with sem */ |
| 1515 | list_del_init(node); |
| 1516 | |
| 1517 | spin_unlock_irqrestore(&dev->urbs.lock, flags); |
| 1518 | |
| 1519 | unode = list_entry(node, struct urb_node, entry); |
| 1520 | urb = unode->urb; |
| 1521 | |
| 1522 | /* Free each separately allocated piece */ |
Greg Kroah-Hartman | c220cc3 | 2010-04-29 15:36:29 -0700 | [diff] [blame] | 1523 | usb_free_coherent(urb->dev, dev->urbs.size, |
| 1524 | urb->transfer_buffer, urb->transfer_dma); |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1525 | usb_free_urb(urb); |
| 1526 | kfree(node); |
| 1527 | } |
| 1528 | |
| 1529 | kref_put(&dev->kref, dlfb_delete); |
| 1530 | |
| 1531 | } |
| 1532 | |
| 1533 | static int dlfb_alloc_urb_list(struct dlfb_data *dev, int count, size_t size) |
| 1534 | { |
| 1535 | int i = 0; |
| 1536 | struct urb *urb; |
| 1537 | struct urb_node *unode; |
| 1538 | char *buf; |
| 1539 | |
| 1540 | spin_lock_init(&dev->urbs.lock); |
| 1541 | |
| 1542 | dev->urbs.size = size; |
| 1543 | INIT_LIST_HEAD(&dev->urbs.list); |
| 1544 | |
| 1545 | while (i < count) { |
| 1546 | unode = kzalloc(sizeof(struct urb_node), GFP_KERNEL); |
| 1547 | if (!unode) |
| 1548 | break; |
| 1549 | unode->dev = dev; |
| 1550 | |
| 1551 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1552 | if (!urb) { |
| 1553 | kfree(unode); |
| 1554 | break; |
| 1555 | } |
| 1556 | unode->urb = urb; |
| 1557 | |
Greg Kroah-Hartman | c220cc3 | 2010-04-29 15:36:29 -0700 | [diff] [blame] | 1558 | buf = usb_alloc_coherent(dev->udev, MAX_TRANSFER, GFP_KERNEL, |
| 1559 | &urb->transfer_dma); |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1560 | if (!buf) { |
| 1561 | kfree(unode); |
| 1562 | usb_free_urb(urb); |
| 1563 | break; |
| 1564 | } |
| 1565 | |
| 1566 | /* urb->transfer_buffer_length set to actual before submit */ |
| 1567 | usb_fill_bulk_urb(urb, dev->udev, usb_sndbulkpipe(dev->udev, 1), |
| 1568 | buf, size, dlfb_urb_completion, unode); |
| 1569 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 1570 | |
| 1571 | list_add_tail(&unode->entry, &dev->urbs.list); |
| 1572 | |
| 1573 | i++; |
| 1574 | } |
| 1575 | |
| 1576 | sema_init(&dev->urbs.limit_sem, i); |
| 1577 | dev->urbs.count = i; |
| 1578 | dev->urbs.available = i; |
| 1579 | |
| 1580 | kref_get(&dev->kref); /* released in free_render_urbs() */ |
| 1581 | |
Soeren Moeller | b5a2104 | 2010-05-14 19:03:00 +0000 | [diff] [blame] | 1582 | dl_notice("allocated %d %d byte urbs\n", i, (int) size); |
Bernie Thompson | 4a4854d | 2010-02-15 06:45:55 -0800 | [diff] [blame] | 1583 | |
| 1584 | return i; |
| 1585 | } |
| 1586 | |
| 1587 | static struct urb *dlfb_get_urb(struct dlfb_data *dev) |
| 1588 | { |
| 1589 | int ret = 0; |
| 1590 | struct list_head *entry; |
| 1591 | struct urb_node *unode; |
| 1592 | struct urb *urb = NULL; |
| 1593 | unsigned long flags; |
| 1594 | |
| 1595 | /* Wait for an in-flight buffer to complete and get re-queued */ |
| 1596 | ret = down_timeout(&dev->urbs.limit_sem, GET_URB_TIMEOUT); |
| 1597 | if (ret) { |
| 1598 | atomic_set(&dev->lost_pixels, 1); |
| 1599 | dl_err("wait for urb interrupted: %x\n", ret); |
| 1600 | goto error; |
| 1601 | } |
| 1602 | |
| 1603 | spin_lock_irqsave(&dev->urbs.lock, flags); |
| 1604 | |
| 1605 | BUG_ON(list_empty(&dev->urbs.list)); /* reserved one with limit_sem */ |
| 1606 | entry = dev->urbs.list.next; |
| 1607 | list_del_init(entry); |
| 1608 | dev->urbs.available--; |
| 1609 | |
| 1610 | spin_unlock_irqrestore(&dev->urbs.lock, flags); |
| 1611 | |
| 1612 | unode = list_entry(entry, struct urb_node, entry); |
| 1613 | urb = unode->urb; |
| 1614 | |
| 1615 | error: |
| 1616 | return urb; |
| 1617 | } |
| 1618 | |
| 1619 | static int dlfb_submit_urb(struct dlfb_data *dev, struct urb *urb, size_t len) |
| 1620 | { |
| 1621 | int ret; |
| 1622 | |
| 1623 | BUG_ON(len > dev->urbs.size); |
| 1624 | |
| 1625 | urb->transfer_buffer_length = len; /* set to actual payload len */ |
| 1626 | ret = usb_submit_urb(urb, GFP_KERNEL); |
| 1627 | if (ret) { |
| 1628 | dlfb_urb_completion(urb); /* because no one else will */ |
| 1629 | atomic_set(&dev->lost_pixels, 1); |
| 1630 | dl_err("usb_submit_urb error %x\n", ret); |
| 1631 | } |
| 1632 | return ret; |
| 1633 | } |
| 1634 | |
Bernie Thompson | 59277b6 | 2009-11-24 15:52:21 -0800 | [diff] [blame] | 1635 | MODULE_AUTHOR("Roberto De Ioris <roberto@unbit.it>, " |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1636 | "Jaya Kumar <jayakumar.lkml@gmail.com>, " |
| 1637 | "Bernie Thompson <bernie@plugable.com>"); |
| 1638 | MODULE_DESCRIPTION("DisplayLink kernel framebuffer driver"); |
Roberto De Ioris | 88e58b1 | 2009-06-03 14:03:06 -0700 | [diff] [blame] | 1639 | MODULE_LICENSE("GPL"); |
Bernie Thompson | 2469d5d | 2010-02-15 06:46:13 -0800 | [diff] [blame] | 1640 | |