Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/video/metronomefb.c -- FB driver for Metronome controller |
| 3 | * |
| 4 | * Copyright (C) 2008, Jaya Kumar |
| 5 | * |
| 6 | * This file is subject to the terms and conditions of the GNU General Public |
| 7 | * License. See the file COPYING in the main directory of this archive for |
| 8 | * more details. |
| 9 | * |
| 10 | * Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven. |
| 11 | * |
| 12 | * This work was made possible by help and equipment support from E-Ink |
| 13 | * Corporation. http://support.eink.com/community |
| 14 | * |
| 15 | * This driver is written to be used with the Metronome display controller. |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 16 | * It is intended to be architecture independent. A board specific driver |
| 17 | * must be used to perform all the physical IO interactions. An example |
| 18 | * is provided as am200epd.c |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 19 | * |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 20 | */ |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/string.h> |
| 25 | #include <linux/mm.h> |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 26 | #include <linux/vmalloc.h> |
| 27 | #include <linux/delay.h> |
| 28 | #include <linux/interrupt.h> |
| 29 | #include <linux/fb.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/platform_device.h> |
| 32 | #include <linux/list.h> |
| 33 | #include <linux/firmware.h> |
| 34 | #include <linux/dma-mapping.h> |
| 35 | #include <linux/uaccess.h> |
| 36 | #include <linux/irq.h> |
| 37 | |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 38 | #include <video/metronomefb.h> |
| 39 | |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 40 | #include <asm/unaligned.h> |
| 41 | |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 42 | /* Display specific information */ |
| 43 | #define DPY_W 832 |
| 44 | #define DPY_H 622 |
| 45 | |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 46 | static int user_wfm_size; |
| 47 | |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 48 | /* frame differs from image. frame includes non-visible pixels */ |
| 49 | struct epd_frame { |
| 50 | int fw; /* frame width */ |
| 51 | int fh; /* frame height */ |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 52 | u16 config[4]; |
| 53 | int wfm_size; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 54 | }; |
| 55 | |
| 56 | static struct epd_frame epd_frame_table[] = { |
| 57 | { |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 58 | .fw = 832, |
| 59 | .fh = 622, |
| 60 | .config = { |
| 61 | 15 /* sdlew */ |
| 62 | | 2 << 8 /* sdosz */ |
| 63 | | 0 << 11 /* sdor */ |
| 64 | | 0 << 12 /* sdces */ |
| 65 | | 0 << 15, /* sdcer */ |
| 66 | 42 /* gdspl */ |
| 67 | | 1 << 8 /* gdr1 */ |
| 68 | | 1 << 9 /* sdshr */ |
| 69 | | 0 << 15, /* gdspp */ |
| 70 | 18 /* gdspw */ |
| 71 | | 0 << 15, /* dispc */ |
| 72 | 599 /* vdlc */ |
| 73 | | 0 << 11 /* dsi */ |
| 74 | | 0 << 12, /* dsic */ |
| 75 | }, |
| 76 | .wfm_size = 47001, |
| 77 | }, |
| 78 | { |
| 79 | .fw = 1088, |
| 80 | .fh = 791, |
| 81 | .config = { |
| 82 | 0x0104, |
| 83 | 0x031f, |
| 84 | 0x0088, |
| 85 | 0x02ff, |
| 86 | }, |
| 87 | .wfm_size = 46770, |
| 88 | }, |
| 89 | { |
| 90 | .fw = 1200, |
| 91 | .fh = 842, |
| 92 | .config = { |
| 93 | 0x0101, |
| 94 | 0x030e, |
| 95 | 0x0012, |
| 96 | 0x0280, |
| 97 | }, |
| 98 | .wfm_size = 46770, |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 99 | }, |
| 100 | }; |
| 101 | |
| 102 | static struct fb_fix_screeninfo metronomefb_fix __devinitdata = { |
| 103 | .id = "metronomefb", |
| 104 | .type = FB_TYPE_PACKED_PIXELS, |
| 105 | .visual = FB_VISUAL_STATIC_PSEUDOCOLOR, |
| 106 | .xpanstep = 0, |
| 107 | .ypanstep = 0, |
| 108 | .ywrapstep = 0, |
| 109 | .line_length = DPY_W, |
| 110 | .accel = FB_ACCEL_NONE, |
| 111 | }; |
| 112 | |
| 113 | static struct fb_var_screeninfo metronomefb_var __devinitdata = { |
| 114 | .xres = DPY_W, |
| 115 | .yres = DPY_H, |
| 116 | .xres_virtual = DPY_W, |
| 117 | .yres_virtual = DPY_H, |
| 118 | .bits_per_pixel = 8, |
| 119 | .grayscale = 1, |
| 120 | .nonstd = 1, |
| 121 | .red = { 4, 3, 0 }, |
| 122 | .green = { 0, 0, 0 }, |
| 123 | .blue = { 0, 0, 0 }, |
| 124 | .transp = { 0, 0, 0 }, |
| 125 | }; |
| 126 | |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 127 | /* the waveform structure that is coming from userspace firmware */ |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 128 | struct waveform_hdr { |
| 129 | u8 stuff[32]; |
| 130 | |
| 131 | u8 wmta[3]; |
| 132 | u8 fvsn; |
| 133 | |
| 134 | u8 luts; |
| 135 | u8 mc; |
| 136 | u8 trc; |
| 137 | u8 stuff3; |
| 138 | |
| 139 | u8 endb; |
| 140 | u8 swtb; |
| 141 | u8 stuff2a[2]; |
| 142 | |
| 143 | u8 stuff2b[3]; |
| 144 | u8 wfm_cs; |
| 145 | } __attribute__ ((packed)); |
| 146 | |
| 147 | /* main metronomefb functions */ |
| 148 | static u8 calc_cksum(int start, int end, u8 *mem) |
| 149 | { |
| 150 | u8 tmp = 0; |
| 151 | int i; |
| 152 | |
| 153 | for (i = start; i < end; i++) |
| 154 | tmp += mem[i]; |
| 155 | |
| 156 | return tmp; |
| 157 | } |
| 158 | |
| 159 | static u16 calc_img_cksum(u16 *start, int length) |
| 160 | { |
| 161 | u16 tmp = 0; |
| 162 | |
| 163 | while (length--) |
| 164 | tmp += *start++; |
| 165 | |
| 166 | return tmp; |
| 167 | } |
| 168 | |
| 169 | /* here we decode the incoming waveform file and populate metromem */ |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 170 | static int __devinit load_waveform(u8 *mem, size_t size, int m, int t, |
| 171 | struct metronomefb_par *par) |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 172 | { |
| 173 | int tta; |
| 174 | int wmta; |
| 175 | int trn = 0; |
| 176 | int i; |
| 177 | unsigned char v; |
| 178 | u8 cksum; |
| 179 | int cksum_idx; |
| 180 | int wfm_idx, owfm_idx; |
| 181 | int mem_idx = 0; |
| 182 | struct waveform_hdr *wfm_hdr; |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 183 | u8 *metromem = par->metromem_wfm; |
| 184 | struct device *dev = par->info->dev; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 185 | |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 186 | if (user_wfm_size) |
| 187 | epd_frame_table[par->dt].wfm_size = user_wfm_size; |
| 188 | |
| 189 | if (size != epd_frame_table[par->dt].wfm_size) { |
Alan Cox | 6d54aaf | 2008-10-15 10:50:32 +0100 | [diff] [blame] | 190 | dev_err(dev, "Error: unexpected size %Zd != %d\n", size, |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 191 | epd_frame_table[par->dt].wfm_size); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 192 | return -EINVAL; |
| 193 | } |
| 194 | |
| 195 | wfm_hdr = (struct waveform_hdr *) mem; |
| 196 | |
| 197 | if (wfm_hdr->fvsn != 1) { |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 198 | dev_err(dev, "Error: bad fvsn %x\n", wfm_hdr->fvsn); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 199 | return -EINVAL; |
| 200 | } |
| 201 | if (wfm_hdr->luts != 0) { |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 202 | dev_err(dev, "Error: bad luts %x\n", wfm_hdr->luts); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 203 | return -EINVAL; |
| 204 | } |
| 205 | cksum = calc_cksum(32, 47, mem); |
| 206 | if (cksum != wfm_hdr->wfm_cs) { |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 207 | dev_err(dev, "Error: bad cksum %x != %x\n", cksum, |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 208 | wfm_hdr->wfm_cs); |
| 209 | return -EINVAL; |
| 210 | } |
| 211 | wfm_hdr->mc += 1; |
| 212 | wfm_hdr->trc += 1; |
| 213 | for (i = 0; i < 5; i++) { |
| 214 | if (*(wfm_hdr->stuff2a + i) != 0) { |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 215 | dev_err(dev, "Error: unexpected value in padding\n"); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 216 | return -EINVAL; |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | /* calculating trn. trn is something used to index into |
| 221 | the waveform. presumably selecting the right one for the |
| 222 | desired temperature. it works out the offset of the first |
| 223 | v that exceeds the specified temperature */ |
| 224 | if ((sizeof(*wfm_hdr) + wfm_hdr->trc) > size) |
| 225 | return -EINVAL; |
| 226 | |
| 227 | for (i = sizeof(*wfm_hdr); i <= sizeof(*wfm_hdr) + wfm_hdr->trc; i++) { |
| 228 | if (mem[i] > t) { |
| 229 | trn = i - sizeof(*wfm_hdr) - 1; |
| 230 | break; |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | /* check temperature range table checksum */ |
| 235 | cksum_idx = sizeof(*wfm_hdr) + wfm_hdr->trc + 1; |
| 236 | if (cksum_idx > size) |
| 237 | return -EINVAL; |
| 238 | cksum = calc_cksum(sizeof(*wfm_hdr), cksum_idx, mem); |
| 239 | if (cksum != mem[cksum_idx]) { |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 240 | dev_err(dev, "Error: bad temperature range table cksum" |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 241 | " %x != %x\n", cksum, mem[cksum_idx]); |
| 242 | return -EINVAL; |
| 243 | } |
| 244 | |
| 245 | /* check waveform mode table address checksum */ |
Harvey Harrison | d15c0a4 | 2008-04-29 01:03:41 -0700 | [diff] [blame] | 246 | wmta = get_unaligned_le32(wfm_hdr->wmta) & 0x00FFFFFF; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 247 | cksum_idx = wmta + m*4 + 3; |
| 248 | if (cksum_idx > size) |
| 249 | return -EINVAL; |
| 250 | cksum = calc_cksum(cksum_idx - 3, cksum_idx, mem); |
| 251 | if (cksum != mem[cksum_idx]) { |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 252 | dev_err(dev, "Error: bad mode table address cksum" |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 253 | " %x != %x\n", cksum, mem[cksum_idx]); |
| 254 | return -EINVAL; |
| 255 | } |
| 256 | |
| 257 | /* check waveform temperature table address checksum */ |
Harvey Harrison | d15c0a4 | 2008-04-29 01:03:41 -0700 | [diff] [blame] | 258 | tta = get_unaligned_le32(mem + wmta + m * 4) & 0x00FFFFFF; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 259 | cksum_idx = tta + trn*4 + 3; |
| 260 | if (cksum_idx > size) |
| 261 | return -EINVAL; |
| 262 | cksum = calc_cksum(cksum_idx - 3, cksum_idx, mem); |
| 263 | if (cksum != mem[cksum_idx]) { |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 264 | dev_err(dev, "Error: bad temperature table address cksum" |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 265 | " %x != %x\n", cksum, mem[cksum_idx]); |
| 266 | return -EINVAL; |
| 267 | } |
| 268 | |
| 269 | /* here we do the real work of putting the waveform into the |
| 270 | metromem buffer. this does runlength decoding of the waveform */ |
Harvey Harrison | d15c0a4 | 2008-04-29 01:03:41 -0700 | [diff] [blame] | 271 | wfm_idx = get_unaligned_le32(mem + tta + trn * 4) & 0x00FFFFFF; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 272 | owfm_idx = wfm_idx; |
| 273 | if (wfm_idx > size) |
| 274 | return -EINVAL; |
| 275 | while (wfm_idx < size) { |
| 276 | unsigned char rl; |
| 277 | v = mem[wfm_idx++]; |
| 278 | if (v == wfm_hdr->swtb) { |
| 279 | while (((v = mem[wfm_idx++]) != wfm_hdr->swtb) && |
| 280 | wfm_idx < size) |
| 281 | metromem[mem_idx++] = v; |
| 282 | |
| 283 | continue; |
| 284 | } |
| 285 | |
| 286 | if (v == wfm_hdr->endb) |
| 287 | break; |
| 288 | |
| 289 | rl = mem[wfm_idx++]; |
| 290 | for (i = 0; i <= rl; i++) |
| 291 | metromem[mem_idx++] = v; |
| 292 | } |
| 293 | |
| 294 | cksum_idx = wfm_idx; |
| 295 | if (cksum_idx > size) |
| 296 | return -EINVAL; |
| 297 | cksum = calc_cksum(owfm_idx, cksum_idx, mem); |
| 298 | if (cksum != mem[cksum_idx]) { |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 299 | dev_err(dev, "Error: bad waveform data cksum" |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 300 | " %x != %x\n", cksum, mem[cksum_idx]); |
| 301 | return -EINVAL; |
| 302 | } |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 303 | par->frame_count = (mem_idx/64); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 304 | |
| 305 | return 0; |
| 306 | } |
| 307 | |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 308 | static int metronome_display_cmd(struct metronomefb_par *par) |
| 309 | { |
| 310 | int i; |
| 311 | u16 cs; |
| 312 | u16 opcode; |
| 313 | static u8 borderval; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 314 | |
| 315 | /* setup display command |
| 316 | we can't immediately set the opcode since the controller |
| 317 | will try parse the command before we've set it all up |
| 318 | so we just set cs here and set the opcode at the end */ |
| 319 | |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 320 | if (par->metromem_cmd->opcode == 0xCC40) |
| 321 | opcode = cs = 0xCC41; |
| 322 | else |
| 323 | opcode = cs = 0xCC40; |
| 324 | |
| 325 | /* set the args ( 2 bytes ) for display */ |
| 326 | i = 0; |
| 327 | par->metromem_cmd->args[i] = 1 << 3 /* border update */ |
| 328 | | ((borderval++ % 4) & 0x0F) << 4 |
| 329 | | (par->frame_count - 1) << 8; |
| 330 | cs += par->metromem_cmd->args[i++]; |
| 331 | |
| 332 | /* the rest are 0 */ |
| 333 | memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2); |
| 334 | |
| 335 | par->metromem_cmd->csum = cs; |
| 336 | par->metromem_cmd->opcode = opcode; /* display cmd */ |
| 337 | |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 338 | return par->board->met_wait_event_intr(par); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 339 | } |
| 340 | |
| 341 | static int __devinit metronome_powerup_cmd(struct metronomefb_par *par) |
| 342 | { |
| 343 | int i; |
| 344 | u16 cs; |
| 345 | |
| 346 | /* setup power up command */ |
| 347 | par->metromem_cmd->opcode = 0x1234; /* pwr up pseudo cmd */ |
| 348 | cs = par->metromem_cmd->opcode; |
| 349 | |
| 350 | /* set pwr1,2,3 to 1024 */ |
| 351 | for (i = 0; i < 3; i++) { |
| 352 | par->metromem_cmd->args[i] = 1024; |
| 353 | cs += par->metromem_cmd->args[i]; |
| 354 | } |
| 355 | |
| 356 | /* the rest are 0 */ |
| 357 | memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2); |
| 358 | |
| 359 | par->metromem_cmd->csum = cs; |
| 360 | |
| 361 | msleep(1); |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 362 | par->board->set_rst(par, 1); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 363 | |
| 364 | msleep(1); |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 365 | par->board->set_stdby(par, 1); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 366 | |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 367 | return par->board->met_wait_event(par); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 368 | } |
| 369 | |
| 370 | static int __devinit metronome_config_cmd(struct metronomefb_par *par) |
| 371 | { |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 372 | /* setup config command |
| 373 | we can't immediately set the opcode since the controller |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 374 | will try parse the command before we've set it all up */ |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 375 | |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 376 | memcpy(par->metromem_cmd->args, epd_frame_table[par->dt].config, |
| 377 | sizeof(epd_frame_table[par->dt].config)); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 378 | /* the rest are 0 */ |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 379 | memset((u8 *) (par->metromem_cmd->args + 4), 0, (32-4)*2); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 380 | |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 381 | par->metromem_cmd->csum = 0xCC10; |
| 382 | par->metromem_cmd->csum += calc_img_cksum(par->metromem_cmd->args, 4); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 383 | par->metromem_cmd->opcode = 0xCC10; /* config cmd */ |
| 384 | |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 385 | return par->board->met_wait_event(par); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | static int __devinit metronome_init_cmd(struct metronomefb_par *par) |
| 389 | { |
| 390 | int i; |
| 391 | u16 cs; |
| 392 | |
| 393 | /* setup init command |
| 394 | we can't immediately set the opcode since the controller |
| 395 | will try parse the command before we've set it all up |
| 396 | so we just set cs here and set the opcode at the end */ |
| 397 | |
| 398 | cs = 0xCC20; |
| 399 | |
| 400 | /* set the args ( 2 bytes ) for init */ |
| 401 | i = 0; |
| 402 | par->metromem_cmd->args[i] = 0; |
| 403 | cs += par->metromem_cmd->args[i++]; |
| 404 | |
| 405 | /* the rest are 0 */ |
| 406 | memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2); |
| 407 | |
| 408 | par->metromem_cmd->csum = cs; |
| 409 | par->metromem_cmd->opcode = 0xCC20; /* init cmd */ |
| 410 | |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 411 | return par->board->met_wait_event(par); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | static int __devinit metronome_init_regs(struct metronomefb_par *par) |
| 415 | { |
| 416 | int res; |
| 417 | |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 418 | res = par->board->setup_io(par); |
| 419 | if (res) |
| 420 | return res; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 421 | |
| 422 | res = metronome_powerup_cmd(par); |
| 423 | if (res) |
| 424 | return res; |
| 425 | |
| 426 | res = metronome_config_cmd(par); |
| 427 | if (res) |
| 428 | return res; |
| 429 | |
| 430 | res = metronome_init_cmd(par); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 431 | |
| 432 | return res; |
| 433 | } |
| 434 | |
| 435 | static void metronomefb_dpy_update(struct metronomefb_par *par) |
| 436 | { |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 437 | int fbsize; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 438 | u16 cksum; |
| 439 | unsigned char *buf = (unsigned char __force *)par->info->screen_base; |
| 440 | |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 441 | fbsize = par->info->fix.smem_len; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 442 | /* copy from vm to metromem */ |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 443 | memcpy(par->metromem_img, buf, fbsize); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 444 | |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 445 | cksum = calc_img_cksum((u16 *) par->metromem_img, fbsize/2); |
| 446 | *((u16 *)(par->metromem_img) + fbsize/2) = cksum; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 447 | metronome_display_cmd(par); |
| 448 | } |
| 449 | |
| 450 | static u16 metronomefb_dpy_update_page(struct metronomefb_par *par, int index) |
| 451 | { |
| 452 | int i; |
| 453 | u16 csum = 0; |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 454 | u16 *buf = (u16 __force *)(par->info->screen_base + index); |
| 455 | u16 *img = (u16 *)(par->metromem_img + index); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 456 | |
| 457 | /* swizzle from vm to metromem and recalc cksum at the same time*/ |
| 458 | for (i = 0; i < PAGE_SIZE/2; i++) { |
| 459 | *(img + i) = (buf[i] << 5) & 0xE0E0; |
| 460 | csum += *(img + i); |
| 461 | } |
| 462 | return csum; |
| 463 | } |
| 464 | |
| 465 | /* this is called back from the deferred io workqueue */ |
| 466 | static void metronomefb_dpy_deferred_io(struct fb_info *info, |
| 467 | struct list_head *pagelist) |
| 468 | { |
| 469 | u16 cksum; |
| 470 | struct page *cur; |
| 471 | struct fb_deferred_io *fbdefio = info->fbdefio; |
| 472 | struct metronomefb_par *par = info->par; |
| 473 | |
| 474 | /* walk the written page list and swizzle the data */ |
| 475 | list_for_each_entry(cur, &fbdefio->pagelist, lru) { |
| 476 | cksum = metronomefb_dpy_update_page(par, |
| 477 | (cur->index << PAGE_SHIFT)); |
| 478 | par->metromem_img_csum -= par->csum_table[cur->index]; |
| 479 | par->csum_table[cur->index] = cksum; |
| 480 | par->metromem_img_csum += cksum; |
| 481 | } |
| 482 | |
| 483 | metronome_display_cmd(par); |
| 484 | } |
| 485 | |
| 486 | static void metronomefb_fillrect(struct fb_info *info, |
| 487 | const struct fb_fillrect *rect) |
| 488 | { |
| 489 | struct metronomefb_par *par = info->par; |
| 490 | |
Jaya Kumar | 555514f | 2008-04-28 02:15:36 -0700 | [diff] [blame] | 491 | sys_fillrect(info, rect); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 492 | metronomefb_dpy_update(par); |
| 493 | } |
| 494 | |
| 495 | static void metronomefb_copyarea(struct fb_info *info, |
| 496 | const struct fb_copyarea *area) |
| 497 | { |
| 498 | struct metronomefb_par *par = info->par; |
| 499 | |
Jaya Kumar | 555514f | 2008-04-28 02:15:36 -0700 | [diff] [blame] | 500 | sys_copyarea(info, area); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 501 | metronomefb_dpy_update(par); |
| 502 | } |
| 503 | |
| 504 | static void metronomefb_imageblit(struct fb_info *info, |
| 505 | const struct fb_image *image) |
| 506 | { |
| 507 | struct metronomefb_par *par = info->par; |
| 508 | |
Jaya Kumar | 555514f | 2008-04-28 02:15:36 -0700 | [diff] [blame] | 509 | sys_imageblit(info, image); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 510 | metronomefb_dpy_update(par); |
| 511 | } |
| 512 | |
| 513 | /* |
| 514 | * this is the slow path from userspace. they can seek and write to |
| 515 | * the fb. it is based on fb_sys_write |
| 516 | */ |
| 517 | static ssize_t metronomefb_write(struct fb_info *info, const char __user *buf, |
| 518 | size_t count, loff_t *ppos) |
| 519 | { |
| 520 | struct metronomefb_par *par = info->par; |
| 521 | unsigned long p = *ppos; |
| 522 | void *dst; |
| 523 | int err = 0; |
| 524 | unsigned long total_size; |
| 525 | |
| 526 | if (info->state != FBINFO_STATE_RUNNING) |
| 527 | return -EPERM; |
| 528 | |
| 529 | total_size = info->fix.smem_len; |
| 530 | |
| 531 | if (p > total_size) |
| 532 | return -EFBIG; |
| 533 | |
| 534 | if (count > total_size) { |
| 535 | err = -EFBIG; |
| 536 | count = total_size; |
| 537 | } |
| 538 | |
| 539 | if (count + p > total_size) { |
| 540 | if (!err) |
| 541 | err = -ENOSPC; |
| 542 | |
| 543 | count = total_size - p; |
| 544 | } |
| 545 | |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 546 | dst = (void __force *)(info->screen_base + p); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 547 | |
| 548 | if (copy_from_user(dst, buf, count)) |
| 549 | err = -EFAULT; |
| 550 | |
| 551 | if (!err) |
| 552 | *ppos += count; |
| 553 | |
| 554 | metronomefb_dpy_update(par); |
| 555 | |
| 556 | return (err) ? err : count; |
| 557 | } |
| 558 | |
| 559 | static struct fb_ops metronomefb_ops = { |
| 560 | .owner = THIS_MODULE, |
| 561 | .fb_write = metronomefb_write, |
| 562 | .fb_fillrect = metronomefb_fillrect, |
| 563 | .fb_copyarea = metronomefb_copyarea, |
| 564 | .fb_imageblit = metronomefb_imageblit, |
| 565 | }; |
| 566 | |
| 567 | static struct fb_deferred_io metronomefb_defio = { |
| 568 | .delay = HZ, |
| 569 | .deferred_io = metronomefb_dpy_deferred_io, |
| 570 | }; |
| 571 | |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 572 | static int __devinit metronomefb_probe(struct platform_device *dev) |
| 573 | { |
| 574 | struct fb_info *info; |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 575 | struct metronome_board *board; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 576 | int retval = -ENOMEM; |
| 577 | int videomemorysize; |
| 578 | unsigned char *videomemory; |
| 579 | struct metronomefb_par *par; |
| 580 | const struct firmware *fw_entry; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 581 | int i; |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 582 | int panel_type; |
| 583 | int fw, fh; |
| 584 | int epd_dt_index; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 585 | |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 586 | /* pick up board specific routines */ |
| 587 | board = dev->dev.platform_data; |
| 588 | if (!board) |
| 589 | return -EINVAL; |
| 590 | |
| 591 | /* try to count device specific driver, if can't, platform recalls */ |
| 592 | if (!try_module_get(board->owner)) |
| 593 | return -ENODEV; |
| 594 | |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 595 | info = framebuffer_alloc(sizeof(struct metronomefb_par), &dev->dev); |
| 596 | if (!info) |
| 597 | goto err; |
| 598 | |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 599 | /* we have two blocks of memory. |
| 600 | info->screen_base which is vm, and is the fb used by apps. |
| 601 | par->metromem which is physically contiguous memory and |
| 602 | contains the display controller commands, waveform, |
| 603 | processed image data and padding. this is the data pulled |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 604 | by the device's LCD controller and pushed to Metronome. |
| 605 | the metromem memory is allocated by the board driver and |
| 606 | is provided to us */ |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 607 | |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 608 | panel_type = board->get_panel_type(); |
| 609 | switch (panel_type) { |
| 610 | case 6: |
| 611 | epd_dt_index = 0; |
| 612 | break; |
| 613 | case 8: |
| 614 | epd_dt_index = 1; |
| 615 | break; |
| 616 | case 97: |
| 617 | epd_dt_index = 2; |
| 618 | break; |
| 619 | default: |
| 620 | dev_err(&dev->dev, "Unexpected panel type. Defaulting to 6\n"); |
| 621 | epd_dt_index = 0; |
| 622 | break; |
| 623 | } |
| 624 | |
| 625 | fw = epd_frame_table[epd_dt_index].fw; |
| 626 | fh = epd_frame_table[epd_dt_index].fh; |
| 627 | |
| 628 | /* we need to add a spare page because our csum caching scheme walks |
| 629 | * to the end of the page */ |
| 630 | videomemorysize = PAGE_SIZE + (fw * fh); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 631 | videomemory = vmalloc(videomemorysize); |
| 632 | if (!videomemory) |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 633 | goto err_fb_rel; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 634 | |
| 635 | memset(videomemory, 0, videomemorysize); |
| 636 | |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 637 | info->screen_base = (char __force __iomem *)videomemory; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 638 | info->fbops = &metronomefb_ops; |
| 639 | |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 640 | metronomefb_fix.line_length = fw; |
| 641 | metronomefb_var.xres = fw; |
| 642 | metronomefb_var.yres = fh; |
| 643 | metronomefb_var.xres_virtual = fw; |
| 644 | metronomefb_var.yres_virtual = fh; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 645 | info->var = metronomefb_var; |
| 646 | info->fix = metronomefb_fix; |
| 647 | info->fix.smem_len = videomemorysize; |
| 648 | par = info->par; |
| 649 | par->info = info; |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 650 | par->board = board; |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 651 | par->dt = epd_dt_index; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 652 | init_waitqueue_head(&par->waitq); |
| 653 | |
| 654 | /* this table caches per page csum values. */ |
| 655 | par->csum_table = vmalloc(videomemorysize/PAGE_SIZE); |
| 656 | if (!par->csum_table) |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 657 | goto err_vfree; |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 658 | |
| 659 | /* the physical framebuffer that we use is setup by |
| 660 | * the platform device driver. It will provide us |
| 661 | * with cmd, wfm and image memory in a contiguous area. */ |
| 662 | retval = board->setup_fb(par); |
| 663 | if (retval) { |
| 664 | dev_err(&dev->dev, "Failed to setup fb\n"); |
| 665 | goto err_csum_table; |
| 666 | } |
| 667 | |
| 668 | /* after this point we should have a framebuffer */ |
| 669 | if ((!par->metromem_wfm) || (!par->metromem_img) || |
| 670 | (!par->metromem_dma)) { |
| 671 | dev_err(&dev->dev, "fb access failure\n"); |
| 672 | retval = -EINVAL; |
| 673 | goto err_csum_table; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 674 | } |
| 675 | |
| 676 | info->fix.smem_start = par->metromem_dma; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 677 | |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 678 | /* load the waveform in. assume mode 3, temp 31 for now |
| 679 | a) request the waveform file from userspace |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 680 | b) process waveform and decode into metromem */ |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 681 | retval = request_firmware(&fw_entry, "metronome.wbf", &dev->dev); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 682 | if (retval < 0) { |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 683 | dev_err(&dev->dev, "Failed to get waveform\n"); |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 684 | goto err_csum_table; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 685 | } |
| 686 | |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 687 | retval = load_waveform((u8 *) fw_entry->data, fw_entry->size, 3, 31, |
| 688 | par); |
Sebastian Siewior | 2422fbb | 2008-04-28 02:15:39 -0700 | [diff] [blame] | 689 | release_firmware(fw_entry); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 690 | if (retval < 0) { |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 691 | dev_err(&dev->dev, "Failed processing waveform\n"); |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 692 | goto err_csum_table; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 693 | } |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 694 | |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 695 | if (board->setup_irq(info)) |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 696 | goto err_csum_table; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 697 | |
| 698 | retval = metronome_init_regs(par); |
| 699 | if (retval < 0) |
| 700 | goto err_free_irq; |
| 701 | |
Konrad Rzeszutek Wilk | a9b5ff9 | 2009-12-03 10:31:58 -0500 | [diff] [blame] | 702 | info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 703 | |
| 704 | info->fbdefio = &metronomefb_defio; |
| 705 | fb_deferred_io_init(info); |
| 706 | |
| 707 | retval = fb_alloc_cmap(&info->cmap, 8, 0); |
| 708 | if (retval < 0) { |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 709 | dev_err(&dev->dev, "Failed to allocate colormap\n"); |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 710 | goto err_free_irq; |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 711 | } |
| 712 | |
| 713 | /* set cmap */ |
| 714 | for (i = 0; i < 8; i++) |
| 715 | info->cmap.red[i] = (((2*i)+1)*(0xFFFF))/16; |
| 716 | memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*8); |
| 717 | memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*8); |
| 718 | |
| 719 | retval = register_framebuffer(info); |
| 720 | if (retval < 0) |
| 721 | goto err_cmap; |
| 722 | |
| 723 | platform_set_drvdata(dev, info); |
| 724 | |
Jaya Kumar | 2850133 | 2008-08-05 13:52:14 +0100 | [diff] [blame] | 725 | dev_dbg(&dev->dev, |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 726 | "fb%d: Metronome frame buffer device, using %dK of video" |
| 727 | " memory\n", info->node, videomemorysize >> 10); |
| 728 | |
| 729 | return 0; |
| 730 | |
| 731 | err_cmap: |
| 732 | fb_dealloc_cmap(&info->cmap); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 733 | err_free_irq: |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 734 | board->cleanup(par); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 735 | err_csum_table: |
| 736 | vfree(par->csum_table); |
| 737 | err_vfree: |
| 738 | vfree(videomemory); |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 739 | err_fb_rel: |
| 740 | framebuffer_release(info); |
| 741 | err: |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 742 | module_put(board->owner); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 743 | return retval; |
| 744 | } |
| 745 | |
| 746 | static int __devexit metronomefb_remove(struct platform_device *dev) |
| 747 | { |
| 748 | struct fb_info *info = platform_get_drvdata(dev); |
| 749 | |
| 750 | if (info) { |
| 751 | struct metronomefb_par *par = info->par; |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 752 | |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 753 | unregister_framebuffer(info); |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 754 | fb_deferred_io_cleanup(info); |
| 755 | fb_dealloc_cmap(&info->cmap); |
| 756 | par->board->cleanup(par); |
| 757 | vfree(par->csum_table); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 758 | vfree((void __force *)info->screen_base); |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 759 | module_put(par->board->owner); |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 760 | dev_dbg(&dev->dev, "calling release\n"); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 761 | framebuffer_release(info); |
| 762 | } |
| 763 | return 0; |
| 764 | } |
| 765 | |
| 766 | static struct platform_driver metronomefb_driver = { |
| 767 | .probe = metronomefb_probe, |
| 768 | .remove = metronomefb_remove, |
| 769 | .driver = { |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 770 | .owner = THIS_MODULE, |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 771 | .name = "metronomefb", |
| 772 | }, |
| 773 | }; |
| 774 | |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 775 | static int __init metronomefb_init(void) |
| 776 | { |
Jaya Kumar | 03c33a4 | 2008-04-28 02:15:38 -0700 | [diff] [blame] | 777 | return platform_driver_register(&metronomefb_driver); |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 778 | } |
| 779 | |
| 780 | static void __exit metronomefb_exit(void) |
| 781 | { |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 782 | platform_driver_unregister(&metronomefb_driver); |
| 783 | } |
| 784 | |
Jaya Kumar | e935508 | 2008-08-19 11:17:55 +0100 | [diff] [blame] | 785 | module_param(user_wfm_size, uint, 0); |
| 786 | MODULE_PARM_DESC(user_wfm_size, "Set custom waveform size"); |
| 787 | |
Jaya Kumar | de7c6d1 | 2008-03-19 17:01:10 -0700 | [diff] [blame] | 788 | module_init(metronomefb_init); |
| 789 | module_exit(metronomefb_exit); |
| 790 | |
| 791 | MODULE_DESCRIPTION("fbdev driver for Metronome controller"); |
| 792 | MODULE_AUTHOR("Jaya Kumar"); |
| 793 | MODULE_LICENSE("GPL"); |