Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1 | /* |
| 2 | * broadsheetfb.c -- FB driver for E-Ink Broadsheet 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 driver is written to be used with the Broadsheet display controller. |
| 13 | * |
| 14 | * It is intended to be architecture independent. A board specific driver |
| 15 | * must be used to perform all the physical IO interactions. |
| 16 | * |
| 17 | */ |
| 18 | |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/string.h> |
| 23 | #include <linux/mm.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/vmalloc.h> |
| 26 | #include <linux/delay.h> |
| 27 | #include <linux/interrupt.h> |
| 28 | #include <linux/fb.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/platform_device.h> |
| 31 | #include <linux/list.h> |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 32 | #include <linux/firmware.h> |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 33 | #include <linux/uaccess.h> |
| 34 | |
| 35 | #include <video/broadsheetfb.h> |
| 36 | |
Jaya Kumar | c1c341a | 2010-03-10 15:21:24 -0800 | [diff] [blame] | 37 | /* track panel specific parameters */ |
| 38 | struct panel_info { |
| 39 | int w; |
| 40 | int h; |
| 41 | u16 sdcfg; |
| 42 | u16 gdcfg; |
| 43 | u16 lutfmt; |
| 44 | u16 fsynclen; |
| 45 | u16 fendfbegin; |
| 46 | u16 lsynclen; |
| 47 | u16 lendlbegin; |
| 48 | u16 pixclk; |
| 49 | }; |
| 50 | |
| 51 | /* table of panel specific parameters to be indexed into by the board drivers */ |
| 52 | static struct panel_info panel_table[] = { |
| 53 | { /* standard 6" on TFT backplane */ |
| 54 | .w = 800, |
| 55 | .h = 600, |
| 56 | .sdcfg = (100 | (1 << 8) | (1 << 9)), |
| 57 | .gdcfg = 2, |
| 58 | .lutfmt = (4 | (1 << 7)), |
| 59 | .fsynclen = 4, |
| 60 | .fendfbegin = (10 << 8) | 4, |
| 61 | .lsynclen = 10, |
| 62 | .lendlbegin = (100 << 8) | 4, |
| 63 | .pixclk = 6, |
| 64 | }, |
| 65 | { /* custom 3.7" flexible on PET or steel */ |
| 66 | .w = 320, |
| 67 | .h = 240, |
| 68 | .sdcfg = (67 | (0 << 8) | (0 << 9) | (0 << 10) | (0 << 12)), |
| 69 | .gdcfg = 3, |
| 70 | .lutfmt = (4 | (1 << 7)), |
| 71 | .fsynclen = 0, |
| 72 | .fendfbegin = (80 << 8) | 4, |
| 73 | .lsynclen = 10, |
| 74 | .lendlbegin = (80 << 8) | 20, |
| 75 | .pixclk = 14, |
| 76 | }, |
| 77 | { /* standard 9.7" on TFT backplane */ |
| 78 | .w = 1200, |
| 79 | .h = 825, |
| 80 | .sdcfg = (100 | (1 << 8) | (1 << 9) | (0 << 10) | (0 << 12)), |
| 81 | .gdcfg = 2, |
| 82 | .lutfmt = (4 | (1 << 7)), |
| 83 | .fsynclen = 0, |
| 84 | .fendfbegin = (4 << 8) | 4, |
| 85 | .lsynclen = 4, |
| 86 | .lendlbegin = (60 << 8) | 10, |
| 87 | .pixclk = 3, |
| 88 | }, |
| 89 | }; |
| 90 | |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 91 | #define DPY_W 800 |
| 92 | #define DPY_H 600 |
| 93 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 94 | static struct fb_fix_screeninfo broadsheetfb_fix = { |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 95 | .id = "broadsheetfb", |
| 96 | .type = FB_TYPE_PACKED_PIXELS, |
| 97 | .visual = FB_VISUAL_STATIC_PSEUDOCOLOR, |
| 98 | .xpanstep = 0, |
| 99 | .ypanstep = 0, |
| 100 | .ywrapstep = 0, |
| 101 | .line_length = DPY_W, |
| 102 | .accel = FB_ACCEL_NONE, |
| 103 | }; |
| 104 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 105 | static struct fb_var_screeninfo broadsheetfb_var = { |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 106 | .xres = DPY_W, |
| 107 | .yres = DPY_H, |
| 108 | .xres_virtual = DPY_W, |
| 109 | .yres_virtual = DPY_H, |
| 110 | .bits_per_pixel = 8, |
| 111 | .grayscale = 1, |
| 112 | .red = { 0, 4, 0 }, |
| 113 | .green = { 0, 4, 0 }, |
| 114 | .blue = { 0, 4, 0 }, |
| 115 | .transp = { 0, 0, 0 }, |
| 116 | }; |
| 117 | |
| 118 | /* main broadsheetfb functions */ |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 119 | static void broadsheet_gpio_issue_data(struct broadsheetfb_par *par, u16 data) |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 120 | { |
| 121 | par->board->set_ctl(par, BS_WR, 0); |
| 122 | par->board->set_hdb(par, data); |
| 123 | par->board->set_ctl(par, BS_WR, 1); |
| 124 | } |
| 125 | |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 126 | static void broadsheet_gpio_issue_cmd(struct broadsheetfb_par *par, u16 data) |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 127 | { |
| 128 | par->board->set_ctl(par, BS_DC, 0); |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 129 | broadsheet_gpio_issue_data(par, data); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 130 | } |
| 131 | |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 132 | static void broadsheet_gpio_send_command(struct broadsheetfb_par *par, u16 data) |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 133 | { |
| 134 | par->board->wait_for_rdy(par); |
| 135 | |
| 136 | par->board->set_ctl(par, BS_CS, 0); |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 137 | broadsheet_gpio_issue_cmd(par, data); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 138 | par->board->set_ctl(par, BS_DC, 1); |
| 139 | par->board->set_ctl(par, BS_CS, 1); |
| 140 | } |
| 141 | |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 142 | static void broadsheet_gpio_send_cmdargs(struct broadsheetfb_par *par, u16 cmd, |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 143 | int argc, u16 *argv) |
| 144 | { |
| 145 | int i; |
| 146 | |
| 147 | par->board->wait_for_rdy(par); |
| 148 | |
| 149 | par->board->set_ctl(par, BS_CS, 0); |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 150 | broadsheet_gpio_issue_cmd(par, cmd); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 151 | par->board->set_ctl(par, BS_DC, 1); |
| 152 | |
| 153 | for (i = 0; i < argc; i++) |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 154 | broadsheet_gpio_issue_data(par, argv[i]); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 155 | par->board->set_ctl(par, BS_CS, 1); |
| 156 | } |
| 157 | |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 158 | static void broadsheet_mmio_send_cmdargs(struct broadsheetfb_par *par, u16 cmd, |
| 159 | int argc, u16 *argv) |
| 160 | { |
| 161 | int i; |
| 162 | |
| 163 | par->board->mmio_write(par, BS_MMIO_CMD, cmd); |
| 164 | |
| 165 | for (i = 0; i < argc; i++) |
| 166 | par->board->mmio_write(par, BS_MMIO_DATA, argv[i]); |
| 167 | } |
| 168 | |
| 169 | static void broadsheet_send_command(struct broadsheetfb_par *par, u16 data) |
| 170 | { |
| 171 | if (par->board->mmio_write) |
| 172 | par->board->mmio_write(par, BS_MMIO_CMD, data); |
| 173 | else |
| 174 | broadsheet_gpio_send_command(par, data); |
| 175 | } |
| 176 | |
| 177 | static void broadsheet_send_cmdargs(struct broadsheetfb_par *par, u16 cmd, |
| 178 | int argc, u16 *argv) |
| 179 | { |
| 180 | if (par->board->mmio_write) |
| 181 | broadsheet_mmio_send_cmdargs(par, cmd, argc, argv); |
| 182 | else |
| 183 | broadsheet_gpio_send_cmdargs(par, cmd, argc, argv); |
| 184 | } |
| 185 | |
| 186 | static void broadsheet_gpio_burst_write(struct broadsheetfb_par *par, int size, |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 187 | u16 *data) |
| 188 | { |
| 189 | int i; |
| 190 | u16 tmp; |
| 191 | |
| 192 | par->board->set_ctl(par, BS_CS, 0); |
| 193 | par->board->set_ctl(par, BS_DC, 1); |
| 194 | |
| 195 | for (i = 0; i < size; i++) { |
| 196 | par->board->set_ctl(par, BS_WR, 0); |
| 197 | tmp = (data[i] & 0x0F) << 4; |
| 198 | tmp |= (data[i] & 0x0F00) << 4; |
| 199 | par->board->set_hdb(par, tmp); |
| 200 | par->board->set_ctl(par, BS_WR, 1); |
| 201 | } |
| 202 | |
| 203 | par->board->set_ctl(par, BS_CS, 1); |
| 204 | } |
| 205 | |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 206 | static void broadsheet_mmio_burst_write(struct broadsheetfb_par *par, int size, |
| 207 | u16 *data) |
| 208 | { |
| 209 | int i; |
| 210 | u16 tmp; |
| 211 | |
| 212 | for (i = 0; i < size; i++) { |
| 213 | tmp = (data[i] & 0x0F) << 4; |
| 214 | tmp |= (data[i] & 0x0F00) << 4; |
| 215 | par->board->mmio_write(par, BS_MMIO_DATA, tmp); |
| 216 | } |
| 217 | |
| 218 | } |
| 219 | |
| 220 | static void broadsheet_burst_write(struct broadsheetfb_par *par, int size, |
| 221 | u16 *data) |
| 222 | { |
| 223 | if (par->board->mmio_write) |
| 224 | broadsheet_mmio_burst_write(par, size, data); |
| 225 | else |
| 226 | broadsheet_gpio_burst_write(par, size, data); |
| 227 | } |
| 228 | |
| 229 | static u16 broadsheet_gpio_get_data(struct broadsheetfb_par *par) |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 230 | { |
| 231 | u16 res; |
| 232 | /* wait for ready to go hi. (lo is busy) */ |
| 233 | par->board->wait_for_rdy(par); |
| 234 | |
| 235 | /* cs lo, dc lo for cmd, we lo for each data, db as usual */ |
| 236 | par->board->set_ctl(par, BS_DC, 1); |
| 237 | par->board->set_ctl(par, BS_CS, 0); |
| 238 | par->board->set_ctl(par, BS_WR, 0); |
| 239 | |
| 240 | res = par->board->get_hdb(par); |
| 241 | |
| 242 | /* strobe wr */ |
| 243 | par->board->set_ctl(par, BS_WR, 1); |
| 244 | par->board->set_ctl(par, BS_CS, 1); |
| 245 | |
| 246 | return res; |
| 247 | } |
| 248 | |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 249 | |
| 250 | static u16 broadsheet_get_data(struct broadsheetfb_par *par) |
| 251 | { |
| 252 | if (par->board->mmio_read) |
| 253 | return par->board->mmio_read(par); |
| 254 | else |
| 255 | return broadsheet_gpio_get_data(par); |
| 256 | } |
| 257 | |
| 258 | static void broadsheet_gpio_write_reg(struct broadsheetfb_par *par, u16 reg, |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 259 | u16 data) |
| 260 | { |
| 261 | /* wait for ready to go hi. (lo is busy) */ |
| 262 | par->board->wait_for_rdy(par); |
| 263 | |
| 264 | /* cs lo, dc lo for cmd, we lo for each data, db as usual */ |
| 265 | par->board->set_ctl(par, BS_CS, 0); |
| 266 | |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 267 | broadsheet_gpio_issue_cmd(par, BS_CMD_WR_REG); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 268 | |
| 269 | par->board->set_ctl(par, BS_DC, 1); |
| 270 | |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 271 | broadsheet_gpio_issue_data(par, reg); |
| 272 | broadsheet_gpio_issue_data(par, data); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 273 | |
| 274 | par->board->set_ctl(par, BS_CS, 1); |
| 275 | } |
| 276 | |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 277 | static void broadsheet_mmio_write_reg(struct broadsheetfb_par *par, u16 reg, |
| 278 | u16 data) |
| 279 | { |
| 280 | par->board->mmio_write(par, BS_MMIO_CMD, BS_CMD_WR_REG); |
| 281 | par->board->mmio_write(par, BS_MMIO_DATA, reg); |
| 282 | par->board->mmio_write(par, BS_MMIO_DATA, data); |
| 283 | |
| 284 | } |
| 285 | |
| 286 | static void broadsheet_write_reg(struct broadsheetfb_par *par, u16 reg, |
| 287 | u16 data) |
| 288 | { |
| 289 | if (par->board->mmio_write) |
| 290 | broadsheet_mmio_write_reg(par, reg, data); |
| 291 | else |
| 292 | broadsheet_gpio_write_reg(par, reg, data); |
| 293 | } |
| 294 | |
Jaya Kumar | c1c341a | 2010-03-10 15:21:24 -0800 | [diff] [blame] | 295 | static void broadsheet_write_reg32(struct broadsheetfb_par *par, u16 reg, |
| 296 | u32 data) |
| 297 | { |
| 298 | broadsheet_write_reg(par, reg, cpu_to_le32(data) & 0xFFFF); |
| 299 | broadsheet_write_reg(par, reg + 2, (cpu_to_le32(data) >> 16) & 0xFFFF); |
| 300 | } |
| 301 | |
| 302 | |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 303 | static u16 broadsheet_read_reg(struct broadsheetfb_par *par, u16 reg) |
| 304 | { |
Jaya Kumar | 2afb189 | 2010-03-10 15:21:41 -0800 | [diff] [blame] | 305 | broadsheet_send_cmdargs(par, BS_CMD_RD_REG, 1, ®); |
| 306 | par->board->wait_for_rdy(par); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 307 | return broadsheet_get_data(par); |
| 308 | } |
| 309 | |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 310 | /* functions for waveform manipulation */ |
| 311 | static int is_broadsheet_pll_locked(struct broadsheetfb_par *par) |
| 312 | { |
| 313 | return broadsheet_read_reg(par, 0x000A) & 0x0001; |
| 314 | } |
| 315 | |
| 316 | static int broadsheet_setup_plls(struct broadsheetfb_par *par) |
| 317 | { |
| 318 | int retry_count = 0; |
| 319 | u16 tmp; |
| 320 | |
| 321 | /* disable arral saemipu mode */ |
| 322 | broadsheet_write_reg(par, 0x0006, 0x0000); |
| 323 | |
| 324 | broadsheet_write_reg(par, 0x0010, 0x0004); |
| 325 | broadsheet_write_reg(par, 0x0012, 0x5949); |
| 326 | broadsheet_write_reg(par, 0x0014, 0x0040); |
| 327 | broadsheet_write_reg(par, 0x0016, 0x0000); |
| 328 | |
| 329 | do { |
| 330 | if (retry_count++ > 100) |
| 331 | return -ETIMEDOUT; |
| 332 | mdelay(1); |
| 333 | } while (!is_broadsheet_pll_locked(par)); |
| 334 | |
| 335 | tmp = broadsheet_read_reg(par, 0x0006); |
| 336 | tmp &= ~0x1; |
| 337 | broadsheet_write_reg(par, 0x0006, tmp); |
| 338 | |
| 339 | return 0; |
| 340 | } |
| 341 | |
| 342 | static int broadsheet_setup_spi(struct broadsheetfb_par *par) |
| 343 | { |
| 344 | |
| 345 | broadsheet_write_reg(par, 0x0204, ((3 << 3) | 1)); |
| 346 | broadsheet_write_reg(par, 0x0208, 0x0001); |
| 347 | |
| 348 | return 0; |
| 349 | } |
| 350 | |
| 351 | static int broadsheet_setup_spiflash(struct broadsheetfb_par *par, |
| 352 | u16 *orig_sfmcd) |
| 353 | { |
| 354 | |
| 355 | *orig_sfmcd = broadsheet_read_reg(par, 0x0204); |
| 356 | broadsheet_write_reg(par, 0x0208, 0); |
| 357 | broadsheet_write_reg(par, 0x0204, 0); |
| 358 | broadsheet_write_reg(par, 0x0204, ((3 << 3) | 1)); |
| 359 | |
| 360 | return 0; |
| 361 | } |
| 362 | |
| 363 | static int broadsheet_spiflash_wait_for_bit(struct broadsheetfb_par *par, |
| 364 | u16 reg, int bitnum, int val, |
| 365 | int timeout) |
| 366 | { |
| 367 | u16 tmp; |
| 368 | |
| 369 | do { |
| 370 | tmp = broadsheet_read_reg(par, reg); |
| 371 | if (((tmp >> bitnum) & 1) == val) |
| 372 | return 0; |
| 373 | mdelay(1); |
| 374 | } while (timeout--); |
| 375 | |
| 376 | return -ETIMEDOUT; |
| 377 | } |
| 378 | |
| 379 | static int broadsheet_spiflash_write_byte(struct broadsheetfb_par *par, u8 data) |
| 380 | { |
| 381 | broadsheet_write_reg(par, 0x0202, (data | 0x100)); |
| 382 | |
| 383 | return broadsheet_spiflash_wait_for_bit(par, 0x0206, 3, 0, 100); |
| 384 | } |
| 385 | |
| 386 | static int broadsheet_spiflash_read_byte(struct broadsheetfb_par *par, u8 *data) |
| 387 | { |
| 388 | int err; |
| 389 | u16 tmp; |
| 390 | |
| 391 | broadsheet_write_reg(par, 0x0202, 0); |
| 392 | |
| 393 | err = broadsheet_spiflash_wait_for_bit(par, 0x0206, 3, 0, 100); |
| 394 | if (err) |
| 395 | return err; |
| 396 | |
| 397 | tmp = broadsheet_read_reg(par, 0x200); |
| 398 | |
| 399 | *data = tmp & 0xFF; |
| 400 | |
| 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | static int broadsheet_spiflash_wait_for_status(struct broadsheetfb_par *par, |
| 405 | int timeout) |
| 406 | { |
| 407 | u8 tmp; |
| 408 | int err; |
| 409 | |
| 410 | do { |
| 411 | broadsheet_write_reg(par, 0x0208, 1); |
| 412 | |
| 413 | err = broadsheet_spiflash_write_byte(par, 0x05); |
| 414 | if (err) |
| 415 | goto failout; |
| 416 | |
| 417 | err = broadsheet_spiflash_read_byte(par, &tmp); |
| 418 | if (err) |
| 419 | goto failout; |
| 420 | |
| 421 | broadsheet_write_reg(par, 0x0208, 0); |
| 422 | |
| 423 | if (!(tmp & 0x1)) |
| 424 | return 0; |
| 425 | |
| 426 | mdelay(5); |
| 427 | } while (timeout--); |
| 428 | |
| 429 | dev_err(par->info->device, "Timed out waiting for spiflash status\n"); |
| 430 | return -ETIMEDOUT; |
| 431 | |
| 432 | failout: |
| 433 | broadsheet_write_reg(par, 0x0208, 0); |
| 434 | return err; |
| 435 | } |
| 436 | |
| 437 | static int broadsheet_spiflash_op_on_address(struct broadsheetfb_par *par, |
| 438 | u8 op, u32 addr) |
| 439 | { |
| 440 | int i; |
| 441 | u8 tmp; |
| 442 | int err; |
| 443 | |
| 444 | broadsheet_write_reg(par, 0x0208, 1); |
| 445 | |
| 446 | err = broadsheet_spiflash_write_byte(par, op); |
| 447 | if (err) |
| 448 | return err; |
| 449 | |
| 450 | for (i = 2; i >= 0; i--) { |
| 451 | tmp = ((addr >> (i * 8)) & 0xFF); |
| 452 | err = broadsheet_spiflash_write_byte(par, tmp); |
| 453 | if (err) |
| 454 | return err; |
| 455 | } |
| 456 | |
| 457 | return err; |
| 458 | } |
| 459 | |
| 460 | static int broadsheet_verify_spiflash(struct broadsheetfb_par *par, |
| 461 | int *flash_type) |
| 462 | { |
| 463 | int err = 0; |
| 464 | u8 sig; |
| 465 | |
| 466 | err = broadsheet_spiflash_op_on_address(par, 0xAB, 0x00000000); |
| 467 | if (err) |
| 468 | goto failout; |
| 469 | |
| 470 | err = broadsheet_spiflash_read_byte(par, &sig); |
| 471 | if (err) |
| 472 | goto failout; |
| 473 | |
| 474 | if ((sig != 0x10) && (sig != 0x11)) { |
| 475 | dev_err(par->info->device, "Unexpected flash type\n"); |
| 476 | err = -EINVAL; |
| 477 | goto failout; |
| 478 | } |
| 479 | |
| 480 | *flash_type = sig; |
| 481 | |
| 482 | failout: |
| 483 | broadsheet_write_reg(par, 0x0208, 0); |
| 484 | return err; |
| 485 | } |
| 486 | |
| 487 | static int broadsheet_setup_for_wfm_write(struct broadsheetfb_par *par, |
| 488 | u16 *initial_sfmcd, int *flash_type) |
| 489 | |
| 490 | { |
| 491 | int err; |
| 492 | |
| 493 | err = broadsheet_setup_plls(par); |
| 494 | if (err) |
| 495 | return err; |
| 496 | |
| 497 | broadsheet_write_reg(par, 0x0106, 0x0203); |
| 498 | |
| 499 | err = broadsheet_setup_spi(par); |
| 500 | if (err) |
| 501 | return err; |
| 502 | |
| 503 | err = broadsheet_setup_spiflash(par, initial_sfmcd); |
| 504 | if (err) |
| 505 | return err; |
| 506 | |
| 507 | return broadsheet_verify_spiflash(par, flash_type); |
| 508 | } |
| 509 | |
| 510 | static int broadsheet_spiflash_write_control(struct broadsheetfb_par *par, |
| 511 | int mode) |
| 512 | { |
| 513 | int err; |
| 514 | |
| 515 | broadsheet_write_reg(par, 0x0208, 1); |
| 516 | if (mode) |
| 517 | err = broadsheet_spiflash_write_byte(par, 0x06); |
| 518 | else |
| 519 | err = broadsheet_spiflash_write_byte(par, 0x04); |
| 520 | |
| 521 | broadsheet_write_reg(par, 0x0208, 0); |
| 522 | return err; |
| 523 | } |
| 524 | |
| 525 | static int broadsheet_spiflash_erase_sector(struct broadsheetfb_par *par, |
| 526 | int addr) |
| 527 | { |
| 528 | int err; |
| 529 | |
| 530 | broadsheet_spiflash_write_control(par, 1); |
| 531 | |
| 532 | err = broadsheet_spiflash_op_on_address(par, 0xD8, addr); |
| 533 | |
| 534 | broadsheet_write_reg(par, 0x0208, 0); |
| 535 | |
| 536 | if (err) |
| 537 | return err; |
| 538 | |
| 539 | err = broadsheet_spiflash_wait_for_status(par, 1000); |
| 540 | |
| 541 | return err; |
| 542 | } |
| 543 | |
| 544 | static int broadsheet_spiflash_read_range(struct broadsheetfb_par *par, |
| 545 | int addr, int size, char *data) |
| 546 | { |
| 547 | int err; |
| 548 | int i; |
| 549 | |
| 550 | err = broadsheet_spiflash_op_on_address(par, 0x03, addr); |
| 551 | if (err) |
| 552 | goto failout; |
| 553 | |
| 554 | for (i = 0; i < size; i++) { |
| 555 | err = broadsheet_spiflash_read_byte(par, &data[i]); |
| 556 | if (err) |
| 557 | goto failout; |
| 558 | } |
| 559 | |
| 560 | failout: |
| 561 | broadsheet_write_reg(par, 0x0208, 0); |
| 562 | return err; |
| 563 | } |
| 564 | |
| 565 | #define BS_SPIFLASH_PAGE_SIZE 256 |
| 566 | static int broadsheet_spiflash_write_page(struct broadsheetfb_par *par, |
| 567 | int addr, const char *data) |
| 568 | { |
| 569 | int err; |
| 570 | int i; |
| 571 | |
| 572 | broadsheet_spiflash_write_control(par, 1); |
| 573 | |
| 574 | err = broadsheet_spiflash_op_on_address(par, 0x02, addr); |
| 575 | if (err) |
| 576 | goto failout; |
| 577 | |
| 578 | for (i = 0; i < BS_SPIFLASH_PAGE_SIZE; i++) { |
| 579 | err = broadsheet_spiflash_write_byte(par, data[i]); |
| 580 | if (err) |
| 581 | goto failout; |
| 582 | } |
| 583 | |
| 584 | broadsheet_write_reg(par, 0x0208, 0); |
| 585 | |
| 586 | err = broadsheet_spiflash_wait_for_status(par, 100); |
| 587 | |
| 588 | failout: |
| 589 | return err; |
| 590 | } |
| 591 | |
| 592 | static int broadsheet_spiflash_write_sector(struct broadsheetfb_par *par, |
| 593 | int addr, const char *data, int sector_size) |
| 594 | { |
| 595 | int i; |
| 596 | int err; |
| 597 | |
| 598 | for (i = 0; i < sector_size; i += BS_SPIFLASH_PAGE_SIZE) { |
| 599 | err = broadsheet_spiflash_write_page(par, addr + i, &data[i]); |
| 600 | if (err) |
| 601 | return err; |
| 602 | } |
| 603 | return 0; |
| 604 | } |
| 605 | |
| 606 | /* |
| 607 | * The caller must guarantee that the data to be rewritten is entirely |
| 608 | * contained within this sector. That is, data_start_addr + data_len |
| 609 | * must be less than sector_start_addr + sector_size. |
| 610 | */ |
| 611 | static int broadsheet_spiflash_rewrite_sector(struct broadsheetfb_par *par, |
| 612 | int sector_size, int data_start_addr, |
| 613 | int data_len, const char *data) |
| 614 | { |
| 615 | int err; |
| 616 | char *sector_buffer; |
| 617 | int tail_start_addr; |
| 618 | int start_sector_addr; |
| 619 | |
| 620 | sector_buffer = kzalloc(sizeof(char)*sector_size, GFP_KERNEL); |
| 621 | if (!sector_buffer) |
| 622 | return -ENOMEM; |
| 623 | |
| 624 | /* the start address of the sector is the 0th byte of that sector */ |
| 625 | start_sector_addr = (data_start_addr / sector_size) * sector_size; |
| 626 | |
| 627 | /* |
| 628 | * check if there is head data that we need to readback into our sector |
| 629 | * buffer first |
| 630 | */ |
| 631 | if (data_start_addr != start_sector_addr) { |
| 632 | /* |
| 633 | * we need to read every byte up till the start address of our |
| 634 | * data and we put it into our sector buffer. |
| 635 | */ |
| 636 | err = broadsheet_spiflash_read_range(par, start_sector_addr, |
| 637 | data_start_addr, sector_buffer); |
| 638 | if (err) |
Colin Ian King | ef6899c | 2015-01-12 15:27:52 +0000 | [diff] [blame] | 639 | goto out; |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | /* now we copy our data into the right place in the sector buffer */ |
| 643 | memcpy(sector_buffer + data_start_addr, data, data_len); |
| 644 | |
| 645 | /* |
| 646 | * now we check if there is a tail section of the sector that we need to |
| 647 | * readback. |
| 648 | */ |
| 649 | tail_start_addr = (data_start_addr + data_len) % sector_size; |
| 650 | |
| 651 | if (tail_start_addr) { |
| 652 | int tail_len; |
| 653 | |
| 654 | tail_len = sector_size - tail_start_addr; |
| 655 | |
| 656 | /* now we read this tail into our sector buffer */ |
| 657 | err = broadsheet_spiflash_read_range(par, tail_start_addr, |
| 658 | tail_len, sector_buffer + tail_start_addr); |
| 659 | if (err) |
Colin Ian King | ef6899c | 2015-01-12 15:27:52 +0000 | [diff] [blame] | 660 | goto out; |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 661 | } |
| 662 | |
| 663 | /* if we got here we have the full sector that we want to rewrite. */ |
| 664 | |
| 665 | /* first erase the sector */ |
| 666 | err = broadsheet_spiflash_erase_sector(par, start_sector_addr); |
| 667 | if (err) |
Colin Ian King | ef6899c | 2015-01-12 15:27:52 +0000 | [diff] [blame] | 668 | goto out; |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 669 | |
| 670 | /* now write it */ |
| 671 | err = broadsheet_spiflash_write_sector(par, start_sector_addr, |
| 672 | sector_buffer, sector_size); |
Colin Ian King | ef6899c | 2015-01-12 15:27:52 +0000 | [diff] [blame] | 673 | out: |
| 674 | kfree(sector_buffer); |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 675 | return err; |
| 676 | } |
| 677 | |
| 678 | static int broadsheet_write_spiflash(struct broadsheetfb_par *par, u32 wfm_addr, |
| 679 | const u8 *wfm, int bytecount, int flash_type) |
| 680 | { |
| 681 | int sector_size; |
| 682 | int err; |
| 683 | int cur_addr; |
| 684 | int writecount; |
| 685 | int maxlen; |
| 686 | int offset = 0; |
| 687 | |
| 688 | switch (flash_type) { |
| 689 | case 0x10: |
| 690 | sector_size = 32*1024; |
| 691 | break; |
| 692 | case 0x11: |
| 693 | default: |
| 694 | sector_size = 64*1024; |
| 695 | break; |
| 696 | } |
| 697 | |
| 698 | while (bytecount) { |
| 699 | cur_addr = wfm_addr + offset; |
| 700 | maxlen = roundup(cur_addr, sector_size) - cur_addr; |
| 701 | writecount = min(bytecount, maxlen); |
| 702 | |
| 703 | err = broadsheet_spiflash_rewrite_sector(par, sector_size, |
| 704 | cur_addr, writecount, wfm + offset); |
| 705 | if (err) |
| 706 | return err; |
| 707 | |
| 708 | offset += writecount; |
| 709 | bytecount -= writecount; |
| 710 | } |
| 711 | |
| 712 | return 0; |
| 713 | } |
| 714 | |
| 715 | static int broadsheet_store_waveform_to_spiflash(struct broadsheetfb_par *par, |
| 716 | const u8 *wfm, size_t wfm_size) |
| 717 | { |
| 718 | int err = 0; |
| 719 | u16 initial_sfmcd = 0; |
| 720 | int flash_type = 0; |
| 721 | |
| 722 | err = broadsheet_setup_for_wfm_write(par, &initial_sfmcd, &flash_type); |
| 723 | if (err) |
| 724 | goto failout; |
| 725 | |
| 726 | err = broadsheet_write_spiflash(par, 0x886, wfm, wfm_size, flash_type); |
| 727 | |
| 728 | failout: |
| 729 | broadsheet_write_reg(par, 0x0204, initial_sfmcd); |
| 730 | return err; |
| 731 | } |
| 732 | |
| 733 | static ssize_t broadsheet_loadstore_waveform(struct device *dev, |
| 734 | struct device_attribute *attr, |
| 735 | const char *buf, size_t len) |
| 736 | { |
| 737 | int err; |
| 738 | struct fb_info *info = dev_get_drvdata(dev); |
| 739 | struct broadsheetfb_par *par = info->par; |
| 740 | const struct firmware *fw_entry; |
| 741 | |
| 742 | if (len < 1) |
| 743 | return -EINVAL; |
| 744 | |
| 745 | err = request_firmware(&fw_entry, "broadsheet.wbf", dev); |
| 746 | if (err < 0) { |
| 747 | dev_err(dev, "Failed to get broadsheet waveform\n"); |
| 748 | goto err_failed; |
| 749 | } |
| 750 | |
| 751 | /* try to enforce reasonable min max on waveform */ |
| 752 | if ((fw_entry->size < 8*1024) || (fw_entry->size > 64*1024)) { |
| 753 | dev_err(dev, "Invalid waveform\n"); |
| 754 | err = -EINVAL; |
Sudip Mukherjee | 4d370b7 | 2015-09-26 14:22:10 +0530 | [diff] [blame] | 755 | goto err_fw; |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 756 | } |
| 757 | |
| 758 | mutex_lock(&(par->io_lock)); |
| 759 | err = broadsheet_store_waveform_to_spiflash(par, fw_entry->data, |
| 760 | fw_entry->size); |
| 761 | |
| 762 | mutex_unlock(&(par->io_lock)); |
| 763 | if (err < 0) { |
| 764 | dev_err(dev, "Failed to store broadsheet waveform\n"); |
Sudip Mukherjee | 4d370b7 | 2015-09-26 14:22:10 +0530 | [diff] [blame] | 765 | goto err_fw; |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 766 | } |
| 767 | |
| 768 | dev_info(dev, "Stored broadsheet waveform, size %zd\n", fw_entry->size); |
| 769 | |
Sudip Mukherjee | 4d370b7 | 2015-09-26 14:22:10 +0530 | [diff] [blame] | 770 | err = len; |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 771 | |
Sudip Mukherjee | 4d370b7 | 2015-09-26 14:22:10 +0530 | [diff] [blame] | 772 | err_fw: |
| 773 | release_firmware(fw_entry); |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 774 | err_failed: |
| 775 | return err; |
| 776 | } |
| 777 | static DEVICE_ATTR(loadstore_waveform, S_IWUSR, NULL, |
| 778 | broadsheet_loadstore_waveform); |
| 779 | |
| 780 | /* upper level functions that manipulate the display and other stuff */ |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 781 | static void broadsheet_init_display(struct broadsheetfb_par *par) |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 782 | { |
| 783 | u16 args[5]; |
Jaya Kumar | c1c341a | 2010-03-10 15:21:24 -0800 | [diff] [blame] | 784 | int xres = par->info->var.xres; |
| 785 | int yres = par->info->var.yres; |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 786 | |
Jaya Kumar | c1c341a | 2010-03-10 15:21:24 -0800 | [diff] [blame] | 787 | args[0] = panel_table[par->panel_index].w; |
| 788 | args[1] = panel_table[par->panel_index].h; |
| 789 | args[2] = panel_table[par->panel_index].sdcfg; |
| 790 | args[3] = panel_table[par->panel_index].gdcfg; |
| 791 | args[4] = panel_table[par->panel_index].lutfmt; |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 792 | broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_CFG, 5, args); |
| 793 | |
| 794 | /* did the controller really set it? */ |
| 795 | broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_CFG, 5, args); |
| 796 | |
Jaya Kumar | c1c341a | 2010-03-10 15:21:24 -0800 | [diff] [blame] | 797 | args[0] = panel_table[par->panel_index].fsynclen; |
| 798 | args[1] = panel_table[par->panel_index].fendfbegin; |
| 799 | args[2] = panel_table[par->panel_index].lsynclen; |
| 800 | args[3] = panel_table[par->panel_index].lendlbegin; |
| 801 | args[4] = panel_table[par->panel_index].pixclk; |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 802 | broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_TMG, 5, args); |
| 803 | |
Jaya Kumar | c1c341a | 2010-03-10 15:21:24 -0800 | [diff] [blame] | 804 | broadsheet_write_reg32(par, 0x310, xres*yres*2); |
| 805 | |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 806 | /* setup waveform */ |
| 807 | args[0] = 0x886; |
| 808 | args[1] = 0; |
| 809 | broadsheet_send_cmdargs(par, BS_CMD_RD_WFM_INFO, 2, args); |
| 810 | |
| 811 | broadsheet_send_command(par, BS_CMD_UPD_GDRV_CLR); |
| 812 | |
| 813 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
| 814 | |
| 815 | broadsheet_write_reg(par, 0x330, 0x84); |
| 816 | |
| 817 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
| 818 | |
| 819 | args[0] = (0x3 << 4); |
| 820 | broadsheet_send_cmdargs(par, BS_CMD_LD_IMG, 1, args); |
| 821 | |
| 822 | args[0] = 0x154; |
| 823 | broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); |
| 824 | |
Jaya Kumar | c1c341a | 2010-03-10 15:21:24 -0800 | [diff] [blame] | 825 | broadsheet_burst_write(par, (panel_table[par->panel_index].w * |
| 826 | panel_table[par->panel_index].h)/2, |
| 827 | (u16 *) par->info->screen_base); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 828 | |
| 829 | broadsheet_send_command(par, BS_CMD_LD_IMG_END); |
| 830 | |
| 831 | args[0] = 0x4300; |
| 832 | broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); |
| 833 | |
| 834 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
| 835 | |
| 836 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); |
| 837 | |
| 838 | par->board->wait_for_rdy(par); |
| 839 | } |
| 840 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 841 | static void broadsheet_identify(struct broadsheetfb_par *par) |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 842 | { |
| 843 | u16 rev, prc; |
| 844 | struct device *dev = par->info->device; |
| 845 | |
| 846 | rev = broadsheet_read_reg(par, BS_REG_REV); |
| 847 | prc = broadsheet_read_reg(par, BS_REG_PRC); |
| 848 | dev_info(dev, "Broadsheet Rev 0x%x, Product Code 0x%x\n", rev, prc); |
| 849 | |
| 850 | if (prc != 0x0047) |
| 851 | dev_warn(dev, "Unrecognized Broadsheet Product Code\n"); |
| 852 | if (rev != 0x0100) |
| 853 | dev_warn(dev, "Unrecognized Broadsheet Revision\n"); |
| 854 | } |
| 855 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 856 | static void broadsheet_init(struct broadsheetfb_par *par) |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 857 | { |
| 858 | broadsheet_send_command(par, BS_CMD_INIT_SYS_RUN); |
| 859 | /* the controller needs a second */ |
| 860 | msleep(1000); |
| 861 | broadsheet_init_display(par); |
| 862 | } |
| 863 | |
| 864 | static void broadsheetfb_dpy_update_pages(struct broadsheetfb_par *par, |
| 865 | u16 y1, u16 y2) |
| 866 | { |
| 867 | u16 args[5]; |
| 868 | unsigned char *buf = (unsigned char *)par->info->screen_base; |
| 869 | |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 870 | mutex_lock(&(par->io_lock)); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 871 | /* y1 must be a multiple of 4 so drop the lower bits */ |
| 872 | y1 &= 0xFFFC; |
| 873 | /* y2 must be a multiple of 4 , but - 1 so up the lower bits */ |
| 874 | y2 |= 0x0003; |
| 875 | |
| 876 | args[0] = 0x3 << 4; |
| 877 | args[1] = 0; |
| 878 | args[2] = y1; |
| 879 | args[3] = cpu_to_le16(par->info->var.xres); |
| 880 | args[4] = y2; |
| 881 | broadsheet_send_cmdargs(par, BS_CMD_LD_IMG_AREA, 5, args); |
| 882 | |
| 883 | args[0] = 0x154; |
| 884 | broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); |
| 885 | |
| 886 | buf += y1 * par->info->var.xres; |
| 887 | broadsheet_burst_write(par, ((1 + y2 - y1) * par->info->var.xres)/2, |
| 888 | (u16 *) buf); |
| 889 | |
| 890 | broadsheet_send_command(par, BS_CMD_LD_IMG_END); |
| 891 | |
| 892 | args[0] = 0x4300; |
| 893 | broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); |
| 894 | |
| 895 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
| 896 | |
| 897 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); |
| 898 | |
| 899 | par->board->wait_for_rdy(par); |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 900 | mutex_unlock(&(par->io_lock)); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 901 | |
| 902 | } |
| 903 | |
| 904 | static void broadsheetfb_dpy_update(struct broadsheetfb_par *par) |
| 905 | { |
| 906 | u16 args[5]; |
| 907 | |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 908 | mutex_lock(&(par->io_lock)); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 909 | args[0] = 0x3 << 4; |
| 910 | broadsheet_send_cmdargs(par, BS_CMD_LD_IMG, 1, args); |
| 911 | |
| 912 | args[0] = 0x154; |
| 913 | broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); |
Jaya Kumar | c1c341a | 2010-03-10 15:21:24 -0800 | [diff] [blame] | 914 | broadsheet_burst_write(par, (panel_table[par->panel_index].w * |
| 915 | panel_table[par->panel_index].h)/2, |
| 916 | (u16 *) par->info->screen_base); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 917 | |
| 918 | broadsheet_send_command(par, BS_CMD_LD_IMG_END); |
| 919 | |
| 920 | args[0] = 0x4300; |
| 921 | broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); |
| 922 | |
| 923 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
| 924 | |
| 925 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); |
| 926 | |
| 927 | par->board->wait_for_rdy(par); |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 928 | mutex_unlock(&(par->io_lock)); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 929 | } |
| 930 | |
| 931 | /* this is called back from the deferred io workqueue */ |
| 932 | static void broadsheetfb_dpy_deferred_io(struct fb_info *info, |
| 933 | struct list_head *pagelist) |
| 934 | { |
| 935 | u16 y1 = 0, h = 0; |
| 936 | int prev_index = -1; |
| 937 | struct page *cur; |
| 938 | struct fb_deferred_io *fbdefio = info->fbdefio; |
| 939 | int h_inc; |
| 940 | u16 yres = info->var.yres; |
| 941 | u16 xres = info->var.xres; |
| 942 | |
| 943 | /* height increment is fixed per page */ |
| 944 | h_inc = DIV_ROUND_UP(PAGE_SIZE , xres); |
| 945 | |
| 946 | /* walk the written page list and swizzle the data */ |
| 947 | list_for_each_entry(cur, &fbdefio->pagelist, lru) { |
| 948 | if (prev_index < 0) { |
| 949 | /* just starting so assign first page */ |
| 950 | y1 = (cur->index << PAGE_SHIFT) / xres; |
| 951 | h = h_inc; |
| 952 | } else if ((prev_index + 1) == cur->index) { |
| 953 | /* this page is consecutive so increase our height */ |
| 954 | h += h_inc; |
| 955 | } else { |
| 956 | /* page not consecutive, issue previous update first */ |
| 957 | broadsheetfb_dpy_update_pages(info->par, y1, y1 + h); |
| 958 | /* start over with our non consecutive page */ |
| 959 | y1 = (cur->index << PAGE_SHIFT) / xres; |
| 960 | h = h_inc; |
| 961 | } |
| 962 | prev_index = cur->index; |
| 963 | } |
| 964 | |
| 965 | /* if we still have any pages to update we do so now */ |
| 966 | if (h >= yres) { |
| 967 | /* its a full screen update, just do it */ |
| 968 | broadsheetfb_dpy_update(info->par); |
| 969 | } else { |
| 970 | broadsheetfb_dpy_update_pages(info->par, y1, |
| 971 | min((u16) (y1 + h), yres)); |
| 972 | } |
| 973 | } |
| 974 | |
| 975 | static void broadsheetfb_fillrect(struct fb_info *info, |
| 976 | const struct fb_fillrect *rect) |
| 977 | { |
| 978 | struct broadsheetfb_par *par = info->par; |
| 979 | |
| 980 | sys_fillrect(info, rect); |
| 981 | |
| 982 | broadsheetfb_dpy_update(par); |
| 983 | } |
| 984 | |
| 985 | static void broadsheetfb_copyarea(struct fb_info *info, |
| 986 | const struct fb_copyarea *area) |
| 987 | { |
| 988 | struct broadsheetfb_par *par = info->par; |
| 989 | |
| 990 | sys_copyarea(info, area); |
| 991 | |
| 992 | broadsheetfb_dpy_update(par); |
| 993 | } |
| 994 | |
| 995 | static void broadsheetfb_imageblit(struct fb_info *info, |
| 996 | const struct fb_image *image) |
| 997 | { |
| 998 | struct broadsheetfb_par *par = info->par; |
| 999 | |
| 1000 | sys_imageblit(info, image); |
| 1001 | |
| 1002 | broadsheetfb_dpy_update(par); |
| 1003 | } |
| 1004 | |
| 1005 | /* |
| 1006 | * this is the slow path from userspace. they can seek and write to |
| 1007 | * the fb. it's inefficient to do anything less than a full screen draw |
| 1008 | */ |
| 1009 | static ssize_t broadsheetfb_write(struct fb_info *info, const char __user *buf, |
| 1010 | size_t count, loff_t *ppos) |
| 1011 | { |
| 1012 | struct broadsheetfb_par *par = info->par; |
| 1013 | unsigned long p = *ppos; |
| 1014 | void *dst; |
| 1015 | int err = 0; |
| 1016 | unsigned long total_size; |
| 1017 | |
| 1018 | if (info->state != FBINFO_STATE_RUNNING) |
| 1019 | return -EPERM; |
| 1020 | |
| 1021 | total_size = info->fix.smem_len; |
| 1022 | |
| 1023 | if (p > total_size) |
| 1024 | return -EFBIG; |
| 1025 | |
| 1026 | if (count > total_size) { |
| 1027 | err = -EFBIG; |
| 1028 | count = total_size; |
| 1029 | } |
| 1030 | |
| 1031 | if (count + p > total_size) { |
| 1032 | if (!err) |
| 1033 | err = -ENOSPC; |
| 1034 | |
| 1035 | count = total_size - p; |
| 1036 | } |
| 1037 | |
| 1038 | dst = (void *)(info->screen_base + p); |
| 1039 | |
| 1040 | if (copy_from_user(dst, buf, count)) |
| 1041 | err = -EFAULT; |
| 1042 | |
| 1043 | if (!err) |
| 1044 | *ppos += count; |
| 1045 | |
| 1046 | broadsheetfb_dpy_update(par); |
| 1047 | |
| 1048 | return (err) ? err : count; |
| 1049 | } |
| 1050 | |
| 1051 | static struct fb_ops broadsheetfb_ops = { |
| 1052 | .owner = THIS_MODULE, |
| 1053 | .fb_read = fb_sys_read, |
| 1054 | .fb_write = broadsheetfb_write, |
| 1055 | .fb_fillrect = broadsheetfb_fillrect, |
| 1056 | .fb_copyarea = broadsheetfb_copyarea, |
| 1057 | .fb_imageblit = broadsheetfb_imageblit, |
| 1058 | }; |
| 1059 | |
| 1060 | static struct fb_deferred_io broadsheetfb_defio = { |
| 1061 | .delay = HZ/4, |
| 1062 | .deferred_io = broadsheetfb_dpy_deferred_io, |
| 1063 | }; |
| 1064 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 1065 | static int broadsheetfb_probe(struct platform_device *dev) |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1066 | { |
| 1067 | struct fb_info *info; |
| 1068 | struct broadsheet_board *board; |
| 1069 | int retval = -ENOMEM; |
| 1070 | int videomemorysize; |
| 1071 | unsigned char *videomemory; |
| 1072 | struct broadsheetfb_par *par; |
| 1073 | int i; |
Jaya Kumar | c1c341a | 2010-03-10 15:21:24 -0800 | [diff] [blame] | 1074 | int dpyw, dpyh; |
| 1075 | int panel_index; |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1076 | |
| 1077 | /* pick up board specific routines */ |
| 1078 | board = dev->dev.platform_data; |
| 1079 | if (!board) |
| 1080 | return -EINVAL; |
| 1081 | |
| 1082 | /* try to count device specific driver, if can't, platform recalls */ |
| 1083 | if (!try_module_get(board->owner)) |
| 1084 | return -ENODEV; |
| 1085 | |
| 1086 | info = framebuffer_alloc(sizeof(struct broadsheetfb_par), &dev->dev); |
| 1087 | if (!info) |
| 1088 | goto err; |
| 1089 | |
Jaya Kumar | c1c341a | 2010-03-10 15:21:24 -0800 | [diff] [blame] | 1090 | switch (board->get_panel_type()) { |
| 1091 | case 37: |
| 1092 | panel_index = 1; |
| 1093 | break; |
| 1094 | case 97: |
| 1095 | panel_index = 2; |
| 1096 | break; |
| 1097 | case 6: |
| 1098 | default: |
| 1099 | panel_index = 0; |
| 1100 | break; |
| 1101 | } |
| 1102 | |
| 1103 | dpyw = panel_table[panel_index].w; |
| 1104 | dpyh = panel_table[panel_index].h; |
| 1105 | |
| 1106 | videomemorysize = roundup((dpyw*dpyh), PAGE_SIZE); |
| 1107 | |
Joe Perches | 1b86d77 | 2011-05-28 11:13:33 -0700 | [diff] [blame] | 1108 | videomemory = vzalloc(videomemorysize); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1109 | if (!videomemory) |
| 1110 | goto err_fb_rel; |
| 1111 | |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1112 | info->screen_base = (char *)videomemory; |
| 1113 | info->fbops = &broadsheetfb_ops; |
| 1114 | |
Jaya Kumar | c1c341a | 2010-03-10 15:21:24 -0800 | [diff] [blame] | 1115 | broadsheetfb_var.xres = dpyw; |
| 1116 | broadsheetfb_var.yres = dpyh; |
| 1117 | broadsheetfb_var.xres_virtual = dpyw; |
| 1118 | broadsheetfb_var.yres_virtual = dpyh; |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1119 | info->var = broadsheetfb_var; |
Jaya Kumar | c1c341a | 2010-03-10 15:21:24 -0800 | [diff] [blame] | 1120 | |
| 1121 | broadsheetfb_fix.line_length = dpyw; |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1122 | info->fix = broadsheetfb_fix; |
| 1123 | info->fix.smem_len = videomemorysize; |
| 1124 | par = info->par; |
Jaya Kumar | c1c341a | 2010-03-10 15:21:24 -0800 | [diff] [blame] | 1125 | par->panel_index = panel_index; |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1126 | par->info = info; |
| 1127 | par->board = board; |
| 1128 | par->write_reg = broadsheet_write_reg; |
| 1129 | par->read_reg = broadsheet_read_reg; |
| 1130 | init_waitqueue_head(&par->waitq); |
| 1131 | |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 1132 | mutex_init(&par->io_lock); |
| 1133 | |
Konrad Rzeszutek Wilk | a9b5ff9 | 2009-12-03 10:31:58 -0500 | [diff] [blame] | 1134 | info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB; |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1135 | |
| 1136 | info->fbdefio = &broadsheetfb_defio; |
| 1137 | fb_deferred_io_init(info); |
| 1138 | |
| 1139 | retval = fb_alloc_cmap(&info->cmap, 16, 0); |
| 1140 | if (retval < 0) { |
| 1141 | dev_err(&dev->dev, "Failed to allocate colormap\n"); |
| 1142 | goto err_vfree; |
| 1143 | } |
| 1144 | |
| 1145 | /* set cmap */ |
| 1146 | for (i = 0; i < 16; i++) |
| 1147 | info->cmap.red[i] = (((2*i)+1)*(0xFFFF))/32; |
| 1148 | memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*16); |
| 1149 | memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*16); |
| 1150 | |
| 1151 | retval = par->board->setup_irq(info); |
| 1152 | if (retval < 0) |
| 1153 | goto err_cmap; |
| 1154 | |
| 1155 | /* this inits the dpy */ |
| 1156 | retval = board->init(par); |
| 1157 | if (retval < 0) |
| 1158 | goto err_free_irq; |
| 1159 | |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 1160 | broadsheet_identify(par); |
| 1161 | |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1162 | broadsheet_init(par); |
| 1163 | |
| 1164 | retval = register_framebuffer(info); |
| 1165 | if (retval < 0) |
| 1166 | goto err_free_irq; |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 1167 | |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1168 | platform_set_drvdata(dev, info); |
| 1169 | |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 1170 | retval = device_create_file(&dev->dev, &dev_attr_loadstore_waveform); |
| 1171 | if (retval < 0) |
| 1172 | goto err_unreg_fb; |
| 1173 | |
Joe Perches | 31b6780 | 2013-09-19 18:35:55 -0700 | [diff] [blame] | 1174 | fb_info(info, "Broadsheet frame buffer, using %dK of video memory\n", |
| 1175 | videomemorysize >> 10); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1176 | |
| 1177 | |
| 1178 | return 0; |
| 1179 | |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 1180 | err_unreg_fb: |
| 1181 | unregister_framebuffer(info); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1182 | err_free_irq: |
| 1183 | board->cleanup(par); |
| 1184 | err_cmap: |
| 1185 | fb_dealloc_cmap(&info->cmap); |
| 1186 | err_vfree: |
| 1187 | vfree(videomemory); |
| 1188 | err_fb_rel: |
| 1189 | framebuffer_release(info); |
| 1190 | err: |
| 1191 | module_put(board->owner); |
| 1192 | return retval; |
| 1193 | |
| 1194 | } |
| 1195 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 1196 | static int broadsheetfb_remove(struct platform_device *dev) |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1197 | { |
| 1198 | struct fb_info *info = platform_get_drvdata(dev); |
| 1199 | |
| 1200 | if (info) { |
| 1201 | struct broadsheetfb_par *par = info->par; |
Jaya Kumar | b32bfc3 | 2010-03-10 15:21:43 -0800 | [diff] [blame] | 1202 | |
| 1203 | device_remove_file(info->dev, &dev_attr_loadstore_waveform); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1204 | unregister_framebuffer(info); |
| 1205 | fb_deferred_io_cleanup(info); |
| 1206 | par->board->cleanup(par); |
| 1207 | fb_dealloc_cmap(&info->cmap); |
| 1208 | vfree((void *)info->screen_base); |
| 1209 | module_put(par->board->owner); |
| 1210 | framebuffer_release(info); |
| 1211 | } |
| 1212 | return 0; |
| 1213 | } |
| 1214 | |
| 1215 | static struct platform_driver broadsheetfb_driver = { |
| 1216 | .probe = broadsheetfb_probe, |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 1217 | .remove = broadsheetfb_remove, |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1218 | .driver = { |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1219 | .name = "broadsheetfb", |
| 1220 | }, |
| 1221 | }; |
Hanjun Guo | 46fc950 | 2013-09-29 13:32:07 +0800 | [diff] [blame] | 1222 | module_platform_driver(broadsheetfb_driver); |
Jaya Kumar | 0d4ff4d | 2009-01-01 17:49:19 +0100 | [diff] [blame] | 1223 | |
| 1224 | MODULE_DESCRIPTION("fbdev driver for Broadsheet controller"); |
| 1225 | MODULE_AUTHOR("Jaya Kumar"); |
| 1226 | MODULE_LICENSE("GPL"); |