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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / video / carminefb.c
blob2c76fdf23f2ac5347989e1783beed7789872aac0
1 /*
2 * Frame buffer driver for the Carmine GPU.
3 *
4 * The driver configures the GPU as follows
5 * - FB0 is display 0 with unique memory area
6 * - FB1 is display 1 with unique memory area
7 * - both display use 32 bit colors
8 */
9 #include <linux/delay.h>
10 #include <linux/errno.h>
11 #include <linux/fb.h>
12 #include <linux/interrupt.h>
13 #include <linux/pci.h>
14 #include <linux/slab.h>
15 #include <linux/module.h>
16
17 #include "carminefb.h"
18 #include "carminefb_regs.h"
19
20 #if !defined(__LITTLE_ENDIAN) && !defined(__BIG_ENDIAN)
21 #error "The endianness of the target host has not been defined."
22 #endif
23
24 /*
25 * The initial video mode can be supplied via two different ways:
26 * - as a string that is passed to fb_find_mode() (module option fb_mode_str)
27 * - as an integer that picks the video mode from carmine_modedb[] (module
28 * option fb_mode)
29 *
30 * If nothing is used than the initial video mode will be the
31 * CARMINEFB_DEFAULT_VIDEO_MODE member of the carmine_modedb[].
32 */
33 #define CARMINEFB_DEFAULT_VIDEO_MODE 1
34
35 static unsigned int fb_mode = CARMINEFB_DEFAULT_VIDEO_MODE;
36 module_param(fb_mode, uint, 0444);
37 MODULE_PARM_DESC(fb_mode, "Initial video mode as integer.");
38
39 static char *fb_mode_str;
40 module_param(fb_mode_str, charp, 0444);
41 MODULE_PARM_DESC(fb_mode_str, "Initial video mode in characters.");
42
43 /*
44 * Carminefb displays:
45 * 0b000 None
46 * 0b001 Display 0
47 * 0b010 Display 1
48 */
49 static int fb_displays = CARMINE_USE_DISPLAY0 | CARMINE_USE_DISPLAY1;
50 module_param(fb_displays, int, 0444);
51 MODULE_PARM_DESC(fb_displays, "Bit mode, which displays are used");
52
53 struct carmine_hw {
54 void __iomem *v_regs;
55 void __iomem *screen_mem;
56 struct fb_info *fb[MAX_DISPLAY];
57 };
58
59 struct carmine_resolution {
60 u32 htp;
61 u32 hsp;
62 u32 hsw;
63 u32 hdp;
64 u32 vtr;
65 u32 vsp;
66 u32 vsw;
67 u32 vdp;
68 u32 disp_mode;
69 };
70
71 struct carmine_fb {
72 void __iomem *display_reg;
73 void __iomem *screen_base;
74 u32 smem_offset;
75 u32 cur_mode;
76 u32 new_mode;
77 struct carmine_resolution *res;
78 u32 pseudo_palette[16];
79 };
80
81 static struct fb_fix_screeninfo carminefb_fix __devinitdata = {
82 .id = "Carmine",
83 .type = FB_TYPE_PACKED_PIXELS,
84 .visual = FB_VISUAL_TRUECOLOR,
85 .accel = FB_ACCEL_NONE,
86 };
87
88 static const struct fb_videomode carmine_modedb[] = {
89 {
90 .name = "640x480",
91 .xres = 640,
92 .yres = 480,
93 }, {
94 .name = "800x600",
95 .xres = 800,
96 .yres = 600,
97 },
98 };
99
100 static struct carmine_resolution car_modes[] = {
101 {
102 /* 640x480 */
103 .htp = 800,
104 .hsp = 672,
105 .hsw = 96,
106 .hdp = 640,
107 .vtr = 525,
108 .vsp = 490,
109 .vsw = 2,
110 .vdp = 480,
111 .disp_mode = 0x1400,
112 },
113 {
114 /* 800x600 */
115 .htp = 1060,
116 .hsp = 864,
117 .hsw = 72,
118 .hdp = 800,
119 .vtr = 628,
120 .vsp = 601,
121 .vsw = 2,
122 .vdp = 600,
123 .disp_mode = 0x0d00,
124 }
125 };
126
127 static int carmine_find_mode(const struct fb_var_screeninfo *var)
128 {
129 int i;
130
131 for (i = 0; i < ARRAY_SIZE(car_modes); i++)
132 if (car_modes[i].hdp == var->xres &&
133 car_modes[i].vdp == var->yres)
134 return i;
135 return -EINVAL;
136 }
137
138 static void c_set_disp_reg(const struct carmine_fb *par,
139 u32 offset, u32 val)
140 {
141 writel(val, par->display_reg + offset);
142 }
143
144 static u32 c_get_disp_reg(const struct carmine_fb *par,
145 u32 offset)
146 {
147 return readl(par->display_reg + offset);
148 }
149
150 static void c_set_hw_reg(const struct carmine_hw *hw,
151 u32 offset, u32 val)
152 {
153 writel(val, hw->v_regs + offset);
154 }
155
156 static u32 c_get_hw_reg(const struct carmine_hw *hw,
157 u32 offset)
158 {
159 return readl(hw->v_regs + offset);
160 }
161
162 static int carmine_setcolreg(unsigned regno, unsigned red, unsigned green,
163 unsigned blue, unsigned transp, struct fb_info *info)
164 {
165 if (regno >= 16)
166 return 1;
167
168 red >>= 8;
169 green >>= 8;
170 blue >>= 8;
171 transp >>= 8;
172
173 ((__be32 *)info->pseudo_palette)[regno] = cpu_to_be32(transp << 24 |
174 red << 0 | green << 8 | blue << 16);
175 return 0;
176 }
177
178 static int carmine_check_var(struct fb_var_screeninfo *var,
179 struct fb_info *info)
180 {
181 int ret;
182
183 ret = carmine_find_mode(var);
184 if (ret < 0)
185 return ret;
186
187 if (var->grayscale || var->rotate || var->nonstd)
188 return -EINVAL;
189
190 var->xres_virtual = var->xres;
191 var->yres_virtual = var->yres;
192
193 var->bits_per_pixel = 32;
194
195 #ifdef __BIG_ENDIAN
196 var->transp.offset = 24;
197 var->red.offset = 0;
198 var->green.offset = 8;
199 var->blue.offset = 16;
200 #else
201 var->transp.offset = 24;
202 var->red.offset = 16;
203 var->green.offset = 8;
204 var->blue.offset = 0;
205 #endif
206
207 var->red.length = 8;
208 var->green.length = 8;
209 var->blue.length = 8;
210 var->transp.length = 8;
211
212 var->red.msb_right = 0;
213 var->green.msb_right = 0;
214 var->blue.msb_right = 0;
215 var->transp.msb_right = 0;
216 return 0;
217 }
218
219 static void carmine_init_display_param(struct carmine_fb *par)
220 {
221 u32 width;
222 u32 height;
223 u32 param;
224 u32 window_size;
225 u32 soffset = par->smem_offset;
226
227 c_set_disp_reg(par, CARMINE_DISP_REG_C_TRANS, 0);
228 c_set_disp_reg(par, CARMINE_DISP_REG_MLMR_TRANS, 0);
229 c_set_disp_reg(par, CARMINE_DISP_REG_CURSOR_MODE,
230 CARMINE_CURSOR0_PRIORITY_MASK |
231 CARMINE_CURSOR1_PRIORITY_MASK |
232 CARMINE_CURSOR_CUTZ_MASK);
233
234 /* Set default cursor position */
235 c_set_disp_reg(par, CARMINE_DISP_REG_CUR1_POS, 0 << 16 | 0);
236 c_set_disp_reg(par, CARMINE_DISP_REG_CUR2_POS, 0 << 16 | 0);
237
238 /* Set default display mode */
239 c_set_disp_reg(par, CARMINE_DISP_REG_L0_EXT_MODE, CARMINE_WINDOW_MODE |
240 CARMINE_EXT_CMODE_DIRECT24_RGBA);
241 c_set_disp_reg(par, CARMINE_DISP_REG_L1_EXT_MODE,
242 CARMINE_EXT_CMODE_DIRECT24_RGBA);
243 c_set_disp_reg(par, CARMINE_DISP_REG_L2_EXT_MODE, CARMINE_EXTEND_MODE |
244 CARMINE_EXT_CMODE_DIRECT24_RGBA);
245 c_set_disp_reg(par, CARMINE_DISP_REG_L3_EXT_MODE, CARMINE_EXTEND_MODE |
246 CARMINE_EXT_CMODE_DIRECT24_RGBA);
247 c_set_disp_reg(par, CARMINE_DISP_REG_L4_EXT_MODE, CARMINE_EXTEND_MODE |
248 CARMINE_EXT_CMODE_DIRECT24_RGBA);
249 c_set_disp_reg(par, CARMINE_DISP_REG_L5_EXT_MODE, CARMINE_EXTEND_MODE |
250 CARMINE_EXT_CMODE_DIRECT24_RGBA);
251 c_set_disp_reg(par, CARMINE_DISP_REG_L6_EXT_MODE, CARMINE_EXTEND_MODE |
252 CARMINE_EXT_CMODE_DIRECT24_RGBA);
253 c_set_disp_reg(par, CARMINE_DISP_REG_L7_EXT_MODE, CARMINE_EXTEND_MODE |
254 CARMINE_EXT_CMODE_DIRECT24_RGBA);
255
256 /* Set default frame size to layer mode register */
257 width = par->res->hdp * 4 / CARMINE_DISP_WIDTH_UNIT;
258 width = width << CARMINE_DISP_WIDTH_SHIFT;
259
260 height = par->res->vdp - 1;
261 param = width | height;
262
263 c_set_disp_reg(par, CARMINE_DISP_REG_L0_MODE_W_H, param);
264 c_set_disp_reg(par, CARMINE_DISP_REG_L1_WIDTH, width);
265 c_set_disp_reg(par, CARMINE_DISP_REG_L2_MODE_W_H, param);
266 c_set_disp_reg(par, CARMINE_DISP_REG_L3_MODE_W_H, param);
267 c_set_disp_reg(par, CARMINE_DISP_REG_L4_MODE_W_H, param);
268 c_set_disp_reg(par, CARMINE_DISP_REG_L5_MODE_W_H, param);
269 c_set_disp_reg(par, CARMINE_DISP_REG_L6_MODE_W_H, param);
270 c_set_disp_reg(par, CARMINE_DISP_REG_L7_MODE_W_H, param);
271
272 /* Set default pos and size */
273 window_size = (par->res->vdp - 1) << CARMINE_DISP_WIN_H_SHIFT;
274 window_size |= par->res->hdp;
275
276 c_set_disp_reg(par, CARMINE_DISP_REG_L0_WIN_POS, 0);
277 c_set_disp_reg(par, CARMINE_DISP_REG_L0_WIN_SIZE, window_size);
278 c_set_disp_reg(par, CARMINE_DISP_REG_L1_WIN_POS, 0);
279 c_set_disp_reg(par, CARMINE_DISP_REG_L1_WIN_SIZE, window_size);
280 c_set_disp_reg(par, CARMINE_DISP_REG_L2_WIN_POS, 0);
281 c_set_disp_reg(par, CARMINE_DISP_REG_L2_WIN_SIZE, window_size);
282 c_set_disp_reg(par, CARMINE_DISP_REG_L3_WIN_POS, 0);
283 c_set_disp_reg(par, CARMINE_DISP_REG_L3_WIN_SIZE, window_size);
284 c_set_disp_reg(par, CARMINE_DISP_REG_L4_WIN_POS, 0);
285 c_set_disp_reg(par, CARMINE_DISP_REG_L4_WIN_SIZE, window_size);
286 c_set_disp_reg(par, CARMINE_DISP_REG_L5_WIN_POS, 0);
287 c_set_disp_reg(par, CARMINE_DISP_REG_L5_WIN_SIZE, window_size);
288 c_set_disp_reg(par, CARMINE_DISP_REG_L6_WIN_POS, 0);
289 c_set_disp_reg(par, CARMINE_DISP_REG_L6_WIN_SIZE, window_size);
290 c_set_disp_reg(par, CARMINE_DISP_REG_L7_WIN_POS, 0);
291 c_set_disp_reg(par, CARMINE_DISP_REG_L7_WIN_SIZE, window_size);
292
293 /* Set default origin address */
294 c_set_disp_reg(par, CARMINE_DISP_REG_L0_ORG_ADR, soffset);
295 c_set_disp_reg(par, CARMINE_DISP_REG_L1_ORG_ADR, soffset);
296 c_set_disp_reg(par, CARMINE_DISP_REG_L2_ORG_ADR1, soffset);
297 c_set_disp_reg(par, CARMINE_DISP_REG_L3_ORG_ADR1, soffset);
298 c_set_disp_reg(par, CARMINE_DISP_REG_L4_ORG_ADR1, soffset);
299 c_set_disp_reg(par, CARMINE_DISP_REG_L5_ORG_ADR1, soffset);
300 c_set_disp_reg(par, CARMINE_DISP_REG_L6_ORG_ADR1, soffset);
301 c_set_disp_reg(par, CARMINE_DISP_REG_L7_ORG_ADR1, soffset);
302
303 /* Set default display address */
304 c_set_disp_reg(par, CARMINE_DISP_REG_L0_DISP_ADR, soffset);
305 c_set_disp_reg(par, CARMINE_DISP_REG_L2_DISP_ADR1, soffset);
306 c_set_disp_reg(par, CARMINE_DISP_REG_L3_DISP_ADR1, soffset);
307 c_set_disp_reg(par, CARMINE_DISP_REG_L4_DISP_ADR1, soffset);
308 c_set_disp_reg(par, CARMINE_DISP_REG_L5_DISP_ADR1, soffset);
309 c_set_disp_reg(par, CARMINE_DISP_REG_L6_DISP_ADR0, soffset);
310 c_set_disp_reg(par, CARMINE_DISP_REG_L7_DISP_ADR0, soffset);
311
312 /* Set default display position */
313 c_set_disp_reg(par, CARMINE_DISP_REG_L0_DISP_POS, 0);
314 c_set_disp_reg(par, CARMINE_DISP_REG_L2_DISP_POS, 0);
315 c_set_disp_reg(par, CARMINE_DISP_REG_L3_DISP_POS, 0);
316 c_set_disp_reg(par, CARMINE_DISP_REG_L4_DISP_POS, 0);
317 c_set_disp_reg(par, CARMINE_DISP_REG_L5_DISP_POS, 0);
318 c_set_disp_reg(par, CARMINE_DISP_REG_L6_DISP_POS, 0);
319 c_set_disp_reg(par, CARMINE_DISP_REG_L7_DISP_POS, 0);
320
321 /* Set default blend mode */
322 c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L0, 0);
323 c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L1, 0);
324 c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L2, 0);
325 c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L3, 0);
326 c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L4, 0);
327 c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L5, 0);
328 c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L6, 0);
329 c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L7, 0);
330
331 /* default transparency mode */
332 c_set_disp_reg(par, CARMINE_DISP_REG_L0_TRANS, 0);
333 c_set_disp_reg(par, CARMINE_DISP_REG_L1_TRANS, 0);
334 c_set_disp_reg(par, CARMINE_DISP_REG_L2_TRANS, 0);
335 c_set_disp_reg(par, CARMINE_DISP_REG_L3_TRANS, 0);
336 c_set_disp_reg(par, CARMINE_DISP_REG_L4_TRANS, 0);
337 c_set_disp_reg(par, CARMINE_DISP_REG_L5_TRANS, 0);
338 c_set_disp_reg(par, CARMINE_DISP_REG_L6_TRANS, 0);
339 c_set_disp_reg(par, CARMINE_DISP_REG_L7_TRANS, 0);
340
341 /* Set default read skip parameter */
342 c_set_disp_reg(par, CARMINE_DISP_REG_L0RM, 0);
343 c_set_disp_reg(par, CARMINE_DISP_REG_L2RM, 0);
344 c_set_disp_reg(par, CARMINE_DISP_REG_L3RM, 0);
345 c_set_disp_reg(par, CARMINE_DISP_REG_L4RM, 0);
346 c_set_disp_reg(par, CARMINE_DISP_REG_L5RM, 0);
347 c_set_disp_reg(par, CARMINE_DISP_REG_L6RM, 0);
348 c_set_disp_reg(par, CARMINE_DISP_REG_L7RM, 0);
349
350 c_set_disp_reg(par, CARMINE_DISP_REG_L0PX, 0);
351 c_set_disp_reg(par, CARMINE_DISP_REG_L2PX, 0);
352 c_set_disp_reg(par, CARMINE_DISP_REG_L3PX, 0);
353 c_set_disp_reg(par, CARMINE_DISP_REG_L4PX, 0);
354 c_set_disp_reg(par, CARMINE_DISP_REG_L5PX, 0);
355 c_set_disp_reg(par, CARMINE_DISP_REG_L6PX, 0);
356 c_set_disp_reg(par, CARMINE_DISP_REG_L7PX, 0);
357
358 c_set_disp_reg(par, CARMINE_DISP_REG_L0PY, 0);
359 c_set_disp_reg(par, CARMINE_DISP_REG_L2PY, 0);
360 c_set_disp_reg(par, CARMINE_DISP_REG_L3PY, 0);
361 c_set_disp_reg(par, CARMINE_DISP_REG_L4PY, 0);
362 c_set_disp_reg(par, CARMINE_DISP_REG_L5PY, 0);
363 c_set_disp_reg(par, CARMINE_DISP_REG_L6PY, 0);
364 c_set_disp_reg(par, CARMINE_DISP_REG_L7PY, 0);
365 }
366
367 static void set_display_parameters(struct carmine_fb *par)
368 {
369 u32 mode;
370 u32 hdp, vdp, htp, hsp, hsw, vtr, vsp, vsw;
371
372 /*
373 * display timing. Parameters are decreased by one because hardware
374 * spec is 0 to (n - 1)
375 * */
376 hdp = par->res->hdp - 1;
377 vdp = par->res->vdp - 1;
378 htp = par->res->htp - 1;
379 hsp = par->res->hsp - 1;
380 hsw = par->res->hsw - 1;
381 vtr = par->res->vtr - 1;
382 vsp = par->res->vsp - 1;
383 vsw = par->res->vsw - 1;
384
385 c_set_disp_reg(par, CARMINE_DISP_REG_H_TOTAL,
386 htp << CARMINE_DISP_HTP_SHIFT);
387 c_set_disp_reg(par, CARMINE_DISP_REG_H_PERIOD,
388 (hdp << CARMINE_DISP_HDB_SHIFT) | hdp);
389 c_set_disp_reg(par, CARMINE_DISP_REG_V_H_W_H_POS,
390 (vsw << CARMINE_DISP_VSW_SHIFT) |
391 (hsw << CARMINE_DISP_HSW_SHIFT) |
392 (hsp));
393 c_set_disp_reg(par, CARMINE_DISP_REG_V_TOTAL,
394 vtr << CARMINE_DISP_VTR_SHIFT);
395 c_set_disp_reg(par, CARMINE_DISP_REG_V_PERIOD_POS,
396 (vdp << CARMINE_DISP_VDP_SHIFT) | vsp);
397
398 /* clock */
399 mode = c_get_disp_reg(par, CARMINE_DISP_REG_DCM1);
400 mode = (mode & ~CARMINE_DISP_DCM_MASK) |
401 (par->res->disp_mode & CARMINE_DISP_DCM_MASK);
402 /* enable video output and layer 0 */
403 mode |= CARMINE_DEN | CARMINE_L0E;
404 c_set_disp_reg(par, CARMINE_DISP_REG_DCM1, mode);
405 }
406
407 static int carmine_set_par(struct fb_info *info)
408 {
409 struct carmine_fb *par = info->par;
410 int ret;
411
412 ret = carmine_find_mode(&info->var);
413 if (ret < 0)
414 return ret;
415
416 par->new_mode = ret;
417 if (par->cur_mode != par->new_mode) {
418
419 par->cur_mode = par->new_mode;
420 par->res = &car_modes[par->new_mode];
421
422 carmine_init_display_param(par);
423 set_display_parameters(par);
424 }
425
426 info->fix.line_length = info->var.xres * info->var.bits_per_pixel / 8;
427 return 0;
428 }
429
430 static int init_hardware(struct carmine_hw *hw)
431 {
432 u32 flags;
433 u32 loops;
434 u32 ret;
435
436 /* Initialize Carmine */
437 /* Sets internal clock */
438 c_set_hw_reg(hw, CARMINE_CTL_REG + CARMINE_CTL_REG_CLOCK_ENABLE,
439 CARMINE_DFLT_IP_CLOCK_ENABLE);
440
441 /* Video signal output is turned off */
442 c_set_hw_reg(hw, CARMINE_DISP0_REG + CARMINE_DISP_REG_DCM1, 0);
443 c_set_hw_reg(hw, CARMINE_DISP1_REG + CARMINE_DISP_REG_DCM1, 0);
444
445 /* Software reset */
446 c_set_hw_reg(hw, CARMINE_CTL_REG + CARMINE_CTL_REG_SOFTWARE_RESET, 1);
447 c_set_hw_reg(hw, CARMINE_CTL_REG + CARMINE_CTL_REG_SOFTWARE_RESET, 0);
448
449 /* I/O mode settings */
450 flags = CARMINE_DFLT_IP_DCTL_IO_CONT1 << 16 |
451 CARMINE_DFLT_IP_DCTL_IO_CONT0;
452 c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_IOCONT1_IOCONT0,
453 flags);
454
455 /* DRAM initial sequence */
456 flags = CARMINE_DFLT_IP_DCTL_MODE << 16 | CARMINE_DFLT_IP_DCTL_ADD;
457 c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_MODE_ADD,
458 flags);
459
460 flags = CARMINE_DFLT_IP_DCTL_SET_TIME1 << 16 |
461 CARMINE_DFLT_IP_DCTL_EMODE;
462 c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_SETTIME1_EMODE,
463 flags);
464
465 flags = CARMINE_DFLT_IP_DCTL_REFRESH << 16 |
466 CARMINE_DFLT_IP_DCTL_SET_TIME2;
467 c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_REFRESH_SETTIME2,
468 flags);
469
470 flags = CARMINE_DFLT_IP_DCTL_RESERVE2 << 16 |
471 CARMINE_DFLT_IP_DCTL_FIFO_DEPTH;
472 c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_RSV2_RSV1, flags);
473
474 flags = CARMINE_DFLT_IP_DCTL_DDRIF2 << 16 | CARMINE_DFLT_IP_DCTL_DDRIF1;
475 c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_DDRIF2_DDRIF1,
476 flags);
477
478 flags = CARMINE_DFLT_IP_DCTL_RESERVE0 << 16 |
479 CARMINE_DFLT_IP_DCTL_STATES;
480 c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_RSV0_STATES,
481 flags);
482
483 /* Executes DLL reset */
484 if (CARMINE_DCTL_DLL_RESET) {
485 for (loops = 0; loops < CARMINE_DCTL_INIT_WAIT_LIMIT; loops++) {
486
487 ret = c_get_hw_reg(hw, CARMINE_DCTL_REG +
488 CARMINE_DCTL_REG_RSV0_STATES);
489 ret &= CARMINE_DCTL_REG_STATES_MASK;
490 if (!ret)
491 break;
492
493 mdelay(CARMINE_DCTL_INIT_WAIT_INTERVAL);
494 }
495
496 if (loops >= CARMINE_DCTL_INIT_WAIT_LIMIT) {
497 printk(KERN_ERR "DRAM init failed\n");
498 return -EIO;
499 }
500 }
501
502 flags = CARMINE_DFLT_IP_DCTL_MODE_AFT_RST << 16 |
503 CARMINE_DFLT_IP_DCTL_ADD;
504 c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_MODE_ADD, flags);
505
506 flags = CARMINE_DFLT_IP_DCTL_RESERVE0 << 16 |
507 CARMINE_DFLT_IP_DCTL_STATES_AFT_RST;
508 c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_RSV0_STATES,
509 flags);
510
511 /* Initialize the write back register */
512 c_set_hw_reg(hw, CARMINE_WB_REG + CARMINE_WB_REG_WBM,
513 CARMINE_WB_REG_WBM_DEFAULT);
514
515 /* Initialize the Kottos registers */
516 c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_VRINTM, 0);
517 c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_VRERRM, 0);
518
519 /* Set DC offsets */
520 c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_DC_OFFSET_PX, 0);
521 c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_DC_OFFSET_PY, 0);
522 c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_DC_OFFSET_LX, 0);
523 c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_DC_OFFSET_LY, 0);
524 c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_DC_OFFSET_TX, 0);
525 c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_DC_OFFSET_TY, 0);
526 return 0;
527 }
528
529 static struct fb_ops carminefb_ops = {
530 .owner = THIS_MODULE,
531 .fb_fillrect = cfb_fillrect,
532 .fb_copyarea = cfb_copyarea,
533 .fb_imageblit = cfb_imageblit,
534
535 .fb_check_var = carmine_check_var,
536 .fb_set_par = carmine_set_par,
537 .fb_setcolreg = carmine_setcolreg,
538 };
539
540 static int __devinit alloc_carmine_fb(void __iomem *regs, void __iomem *smem_base,
541 int smem_offset, struct device *device, struct fb_info **rinfo)
542 {
543 int ret;
544 struct fb_info *info;
545 struct carmine_fb *par;
546
547 info = framebuffer_alloc(sizeof *par, device);
548 if (!info)
549 return -ENOMEM;
550
551 par = info->par;
552 par->display_reg = regs;
553 par->smem_offset = smem_offset;
554
555 info->screen_base = smem_base + smem_offset;
556 info->screen_size = CARMINE_DISPLAY_MEM;
557 info->fbops = &carminefb_ops;
558
559 info->fix = carminefb_fix;
560 info->pseudo_palette = par->pseudo_palette;
561 info->flags = FBINFO_DEFAULT;
562
563 ret = fb_alloc_cmap(&info->cmap, 256, 1);
564 if (ret < 0)
565 goto err_free_fb;
566
567 if (fb_mode >= ARRAY_SIZE(carmine_modedb))
568 fb_mode = CARMINEFB_DEFAULT_VIDEO_MODE;
569
570 par->cur_mode = par->new_mode = ~0;
571
572 ret = fb_find_mode(&info->var, info, fb_mode_str, carmine_modedb,
573 ARRAY_SIZE(carmine_modedb),
574 &carmine_modedb[fb_mode], 32);
575 if (!ret || ret == 4) {
576 ret = -EINVAL;
577 goto err_dealloc_cmap;
578 }
579
580 fb_videomode_to_modelist(carmine_modedb, ARRAY_SIZE(carmine_modedb),
581 &info->modelist);
582
583 ret = register_framebuffer(info);
584 if (ret < 0)
585 goto err_dealloc_cmap;
586
587 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
588 info->fix.id);
589
590 *rinfo = info;
591 return 0;
592
593 err_dealloc_cmap:
594 fb_dealloc_cmap(&info->cmap);
595 err_free_fb:
596 framebuffer_release(info);
597 return ret;
598 }
599
600 static void cleanup_fb_device(struct fb_info *info)
601 {
602 if (info) {
603 unregister_framebuffer(info);
604 fb_dealloc_cmap(&info->cmap);
605 framebuffer_release(info);
606 }
607 }
608
609 static int __devinit carminefb_probe(struct pci_dev *dev,
610 const struct pci_device_id *ent)
611 {
612 struct carmine_hw *hw;
613 struct device *device = &dev->dev;
614 struct fb_info *info;
615 int ret;
616
617 ret = pci_enable_device(dev);
618 if (ret)
619 return ret;
620
621 ret = -ENOMEM;
622 hw = kzalloc(sizeof *hw, GFP_KERNEL);
623 if (!hw)
624 goto err_enable_pci;
625
626 carminefb_fix.mmio_start = pci_resource_start(dev, CARMINE_CONFIG_BAR);
627 carminefb_fix.mmio_len = pci_resource_len(dev, CARMINE_CONFIG_BAR);
628
629 if (!request_mem_region(carminefb_fix.mmio_start,
630 carminefb_fix.mmio_len,
631 "carminefb regbase")) {
632 printk(KERN_ERR "carminefb: Can't reserve regbase.\n");
633 ret = -EBUSY;
634 goto err_free_hw;
635 }
636 hw->v_regs = ioremap_nocache(carminefb_fix.mmio_start,
637 carminefb_fix.mmio_len);
638 if (!hw->v_regs) {
639 printk(KERN_ERR "carminefb: Can't remap %s register.\n",
640 carminefb_fix.id);
641 goto err_free_reg_mmio;
642 }
643
644 carminefb_fix.smem_start = pci_resource_start(dev, CARMINE_MEMORY_BAR);
645 carminefb_fix.smem_len = pci_resource_len(dev, CARMINE_MEMORY_BAR);
646
647 /* The memory area tends to be very large (256 MiB). Remap only what
648 * is required for that largest resolution to avoid remaps at run
649 * time
650 */
651 if (carminefb_fix.smem_len > CARMINE_TOTAL_DIPLAY_MEM)
652 carminefb_fix.smem_len = CARMINE_TOTAL_DIPLAY_MEM;
653
654 else if (carminefb_fix.smem_len < CARMINE_TOTAL_DIPLAY_MEM) {
655 printk(KERN_ERR "carminefb: Memory bar is only %d bytes, %d "
656 "are required.", carminefb_fix.smem_len,
657 CARMINE_TOTAL_DIPLAY_MEM);
658 goto err_unmap_vregs;
659 }
660
661 if (!request_mem_region(carminefb_fix.smem_start,
662 carminefb_fix.smem_len, "carminefb smem")) {
663 printk(KERN_ERR "carminefb: Can't reserve smem.\n");
664 goto err_unmap_vregs;
665 }
666
667 hw->screen_mem = ioremap_nocache(carminefb_fix.smem_start,
668 carminefb_fix.smem_len);
669 if (!hw->screen_mem) {
670 printk(KERN_ERR "carmine: Can't ioremap smem area.\n");
671 goto err_reg_smem;
672 }
673
674 ret = init_hardware(hw);
675 if (ret)
676 goto err_unmap_screen;
677
678 info = NULL;
679 if (fb_displays & CARMINE_USE_DISPLAY0) {
680 ret = alloc_carmine_fb(hw->v_regs + CARMINE_DISP0_REG,
681 hw->screen_mem, CARMINE_DISPLAY_MEM * 0,
682 device, &info);
683 if (ret)
684 goto err_deinit_hw;
685 }
686
687 hw->fb[0] = info;
688
689 info = NULL;
690 if (fb_displays & CARMINE_USE_DISPLAY1) {
691 ret = alloc_carmine_fb(hw->v_regs + CARMINE_DISP1_REG,
692 hw->screen_mem, CARMINE_DISPLAY_MEM * 1,
693 device, &info);
694 if (ret)
695 goto err_cleanup_fb0;
696 }
697
698 hw->fb[1] = info;
699 info = NULL;
700
701 pci_set_drvdata(dev, hw);
702 return 0;
703
704 err_cleanup_fb0:
705 cleanup_fb_device(hw->fb[0]);
706 err_deinit_hw:
707 /* disable clock, etc */
708 c_set_hw_reg(hw, CARMINE_CTL_REG + CARMINE_CTL_REG_CLOCK_ENABLE, 0);
709 err_unmap_screen:
710 iounmap(hw->screen_mem);
711 err_reg_smem:
712 release_mem_region(carminefb_fix.smem_start, carminefb_fix.smem_len);
713 err_unmap_vregs:
714 iounmap(hw->v_regs);
715 err_free_reg_mmio:
716 release_mem_region(carminefb_fix.mmio_start, carminefb_fix.mmio_len);
717 err_free_hw:
718 kfree(hw);
719 err_enable_pci:
720 pci_disable_device(dev);
721 return ret;
722 }
723
724 static void __devexit carminefb_remove(struct pci_dev *dev)
725 {
726 struct carmine_hw *hw = pci_get_drvdata(dev);
727 struct fb_fix_screeninfo fix;
728 int i;
729
730 /* in case we use only fb1 and not fb1 */
731 if (hw->fb[0])
732 fix = hw->fb[0]->fix;
733 else
734 fix = hw->fb[1]->fix;
735
736 /* deactivate display(s) and switch clocks */
737 c_set_hw_reg(hw, CARMINE_DISP0_REG + CARMINE_DISP_REG_DCM1, 0);
738 c_set_hw_reg(hw, CARMINE_DISP1_REG + CARMINE_DISP_REG_DCM1, 0);
739 c_set_hw_reg(hw, CARMINE_CTL_REG + CARMINE_CTL_REG_CLOCK_ENABLE, 0);
740
741 for (i = 0; i < MAX_DISPLAY; i++)
742 cleanup_fb_device(hw->fb[i]);
743
744 iounmap(hw->screen_mem);
745 release_mem_region(fix.smem_start, fix.smem_len);
746 iounmap(hw->v_regs);
747 release_mem_region(fix.mmio_start, fix.mmio_len);
748
749 pci_set_drvdata(dev, NULL);
750 pci_disable_device(dev);
751 kfree(hw);
752 }
753
754 #define PCI_VENDOR_ID_FUJITU_LIMITED 0x10cf
755 static struct pci_device_id carmine_devices[] __devinitdata = {
756 {
757 PCI_DEVICE(PCI_VENDOR_ID_FUJITU_LIMITED, 0x202b)},
758 {0, 0, 0, 0, 0, 0, 0}
759 };
760
761 MODULE_DEVICE_TABLE(pci, carmine_devices);
762
763 static struct pci_driver carmine_pci_driver = {
764 .name = "carminefb",
765 .id_table = carmine_devices,
766 .probe = carminefb_probe,
767 .remove = __devexit_p(carminefb_remove),
768 };
769
770 static int __init carminefb_init(void)
771 {
772 if (!(fb_displays &
773 (CARMINE_USE_DISPLAY0 | CARMINE_USE_DISPLAY1))) {
774 printk(KERN_ERR "If you disable both displays than you don't "
775 "need the driver at all\n");
776 return -EINVAL;
777 }
778 return pci_register_driver(&carmine_pci_driver);
779 }
780 module_init(carminefb_init);
781
782 static void __exit carminefb_cleanup(void)
783 {
784 pci_unregister_driver(&carmine_pci_driver);
785 }
786 module_exit(carminefb_cleanup);
787
788 MODULE_AUTHOR("Sebastian Siewior <bigeasy@linutronix.de>");
789 MODULE_DESCRIPTION("Framebuffer driver for Fujitsu Carmine based devices");
790 MODULE_LICENSE("GPL v2");