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cfb4f5d1 MD |
1 | /* |
2 | * SuperH Mobile LCDC Framebuffer | |
3 | * | |
4 | * Copyright (c) 2008 Magnus Damm | |
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 | |
8 | * for more details. | |
9 | */ | |
10 | ||
11 | #include <linux/kernel.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/delay.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/fb.h> | |
16 | #include <linux/clk.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/dma-mapping.h> | |
19 | #include <asm/sh_mobile_lcdc.h> | |
20 | ||
21 | #define PALETTE_NR 16 | |
22 | ||
23 | struct sh_mobile_lcdc_priv; | |
24 | struct sh_mobile_lcdc_chan { | |
25 | struct sh_mobile_lcdc_priv *lcdc; | |
26 | unsigned long *reg_offs; | |
27 | unsigned long ldmt1r_value; | |
28 | unsigned long enabled; /* ME and SE in LDCNT2R */ | |
29 | struct sh_mobile_lcdc_chan_cfg cfg; | |
30 | u32 pseudo_palette[PALETTE_NR]; | |
31 | struct fb_info info; | |
32 | dma_addr_t dma_handle; | |
33 | }; | |
34 | ||
35 | struct sh_mobile_lcdc_priv { | |
36 | void __iomem *base; | |
37 | struct clk *clk; | |
38 | unsigned long lddckr; | |
39 | struct sh_mobile_lcdc_chan ch[2]; | |
40 | }; | |
41 | ||
42 | /* shared registers */ | |
43 | #define _LDDCKR 0x410 | |
44 | #define _LDDCKSTPR 0x414 | |
45 | #define _LDINTR 0x468 | |
46 | #define _LDSR 0x46c | |
47 | #define _LDCNT1R 0x470 | |
48 | #define _LDCNT2R 0x474 | |
49 | #define _LDDDSR 0x47c | |
50 | #define _LDDWD0R 0x800 | |
51 | #define _LDDRDR 0x840 | |
52 | #define _LDDWAR 0x900 | |
53 | #define _LDDRAR 0x904 | |
54 | ||
55 | /* per-channel registers */ | |
56 | enum { LDDCKPAT1R, LDDCKPAT2R, LDMT1R, LDMT2R, LDMT3R, LDDFR, LDSM1R, | |
57 | LDSA1R, LDMLSR, LDHCNR, LDHSYNR, LDVLNR, LDVSYNR, LDPMR }; | |
58 | ||
59 | static unsigned long lcdc_offs_mainlcd[] = { | |
60 | [LDDCKPAT1R] = 0x400, | |
61 | [LDDCKPAT2R] = 0x404, | |
62 | [LDMT1R] = 0x418, | |
63 | [LDMT2R] = 0x41c, | |
64 | [LDMT3R] = 0x420, | |
65 | [LDDFR] = 0x424, | |
66 | [LDSM1R] = 0x428, | |
67 | [LDSA1R] = 0x430, | |
68 | [LDMLSR] = 0x438, | |
69 | [LDHCNR] = 0x448, | |
70 | [LDHSYNR] = 0x44c, | |
71 | [LDVLNR] = 0x450, | |
72 | [LDVSYNR] = 0x454, | |
73 | [LDPMR] = 0x460, | |
74 | }; | |
75 | ||
76 | static unsigned long lcdc_offs_sublcd[] = { | |
77 | [LDDCKPAT1R] = 0x408, | |
78 | [LDDCKPAT2R] = 0x40c, | |
79 | [LDMT1R] = 0x600, | |
80 | [LDMT2R] = 0x604, | |
81 | [LDMT3R] = 0x608, | |
82 | [LDDFR] = 0x60c, | |
83 | [LDSM1R] = 0x610, | |
84 | [LDSA1R] = 0x618, | |
85 | [LDMLSR] = 0x620, | |
86 | [LDHCNR] = 0x624, | |
87 | [LDHSYNR] = 0x628, | |
88 | [LDVLNR] = 0x62c, | |
89 | [LDVSYNR] = 0x630, | |
90 | [LDPMR] = 0x63c, | |
91 | }; | |
92 | ||
93 | #define START_LCDC 0x00000001 | |
94 | #define LCDC_RESET 0x00000100 | |
95 | #define DISPLAY_BEU 0x00000008 | |
96 | #define LCDC_ENABLE 0x00000001 | |
97 | ||
98 | static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan, | |
99 | int reg_nr, unsigned long data) | |
100 | { | |
101 | iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]); | |
102 | } | |
103 | ||
104 | static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan, | |
105 | int reg_nr) | |
106 | { | |
107 | return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]); | |
108 | } | |
109 | ||
110 | static void lcdc_write(struct sh_mobile_lcdc_priv *priv, | |
111 | unsigned long reg_offs, unsigned long data) | |
112 | { | |
113 | iowrite32(data, priv->base + reg_offs); | |
114 | } | |
115 | ||
116 | static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv, | |
117 | unsigned long reg_offs) | |
118 | { | |
119 | return ioread32(priv->base + reg_offs); | |
120 | } | |
121 | ||
122 | static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv, | |
123 | unsigned long reg_offs, | |
124 | unsigned long mask, unsigned long until) | |
125 | { | |
126 | while ((lcdc_read(priv, reg_offs) & mask) != until) | |
127 | cpu_relax(); | |
128 | } | |
129 | ||
130 | static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan) | |
131 | { | |
132 | return chan->cfg.chan == LCDC_CHAN_SUBLCD; | |
133 | } | |
134 | ||
135 | static void lcdc_sys_write_index(void *handle, unsigned long data) | |
136 | { | |
137 | struct sh_mobile_lcdc_chan *ch = handle; | |
138 | ||
139 | lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000); | |
140 | lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0); | |
141 | lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0)); | |
142 | } | |
143 | ||
144 | static void lcdc_sys_write_data(void *handle, unsigned long data) | |
145 | { | |
146 | struct sh_mobile_lcdc_chan *ch = handle; | |
147 | ||
148 | lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000); | |
149 | lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0); | |
150 | lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0)); | |
151 | } | |
152 | ||
153 | static unsigned long lcdc_sys_read_data(void *handle) | |
154 | { | |
155 | struct sh_mobile_lcdc_chan *ch = handle; | |
156 | ||
157 | lcdc_write(ch->lcdc, _LDDRDR, 0x01000000); | |
158 | lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0); | |
159 | lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0)); | |
160 | udelay(1); | |
161 | ||
162 | return lcdc_read(ch->lcdc, _LDDRDR) & 0xffff; | |
163 | } | |
164 | ||
165 | struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = { | |
166 | lcdc_sys_write_index, | |
167 | lcdc_sys_write_data, | |
168 | lcdc_sys_read_data, | |
169 | }; | |
170 | ||
171 | static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv, | |
172 | int start) | |
173 | { | |
174 | unsigned long tmp = lcdc_read(priv, _LDCNT2R); | |
175 | int k; | |
176 | ||
177 | /* start or stop the lcdc */ | |
178 | if (start) | |
179 | lcdc_write(priv, _LDCNT2R, tmp | START_LCDC); | |
180 | else | |
181 | lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC); | |
182 | ||
183 | /* wait until power is applied/stopped on all channels */ | |
184 | for (k = 0; k < ARRAY_SIZE(priv->ch); k++) | |
185 | if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled) | |
186 | while (1) { | |
187 | tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3; | |
188 | if (start && tmp == 3) | |
189 | break; | |
190 | if (!start && tmp == 0) | |
191 | break; | |
192 | cpu_relax(); | |
193 | } | |
194 | ||
195 | if (!start) | |
196 | lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */ | |
197 | } | |
198 | ||
199 | static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv) | |
200 | { | |
201 | struct sh_mobile_lcdc_chan *ch; | |
202 | struct fb_videomode *lcd_cfg; | |
203 | struct sh_mobile_lcdc_board_cfg *board_cfg; | |
204 | unsigned long tmp; | |
205 | int k, m; | |
206 | int ret = 0; | |
207 | ||
208 | /* reset */ | |
209 | lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET); | |
210 | lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0); | |
211 | ||
212 | /* enable LCDC channels */ | |
213 | tmp = lcdc_read(priv, _LDCNT2R); | |
214 | tmp |= priv->ch[0].enabled; | |
215 | tmp |= priv->ch[1].enabled; | |
216 | lcdc_write(priv, _LDCNT2R, tmp); | |
217 | ||
218 | /* read data from external memory, avoid using the BEU for now */ | |
219 | lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU); | |
220 | ||
221 | /* stop the lcdc first */ | |
222 | sh_mobile_lcdc_start_stop(priv, 0); | |
223 | ||
224 | /* configure clocks */ | |
225 | tmp = priv->lddckr; | |
226 | for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { | |
227 | ch = &priv->ch[k]; | |
228 | ||
229 | if (!priv->ch[k].enabled) | |
230 | continue; | |
231 | ||
232 | m = ch->cfg.clock_divider; | |
233 | if (!m) | |
234 | continue; | |
235 | ||
236 | if (m == 1) | |
237 | m = 1 << 6; | |
238 | tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0); | |
239 | ||
240 | lcdc_write_chan(ch, LDDCKPAT1R, 0x00000000); | |
241 | lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1); | |
242 | } | |
243 | ||
244 | lcdc_write(priv, _LDDCKR, tmp); | |
245 | ||
246 | /* start dotclock again */ | |
247 | lcdc_write(priv, _LDDCKSTPR, 0); | |
248 | lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0); | |
249 | ||
250 | /* interrupts are disabled */ | |
251 | lcdc_write(priv, _LDINTR, 0); | |
252 | ||
253 | for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { | |
254 | ch = &priv->ch[k]; | |
255 | lcd_cfg = &ch->cfg.lcd_cfg; | |
256 | ||
257 | if (!ch->enabled) | |
258 | continue; | |
259 | ||
260 | tmp = ch->ldmt1r_value; | |
261 | tmp |= (lcd_cfg->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28; | |
262 | tmp |= (lcd_cfg->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27; | |
263 | lcdc_write_chan(ch, LDMT1R, tmp); | |
264 | ||
265 | /* setup SYS bus */ | |
266 | lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r); | |
267 | lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r); | |
268 | ||
269 | /* horizontal configuration */ | |
270 | tmp = lcd_cfg->xres + lcd_cfg->hsync_len; | |
271 | tmp += lcd_cfg->left_margin; | |
272 | tmp += lcd_cfg->right_margin; | |
273 | tmp /= 8; /* HTCN */ | |
274 | tmp |= (lcd_cfg->xres / 8) << 16; /* HDCN */ | |
275 | lcdc_write_chan(ch, LDHCNR, tmp); | |
276 | ||
277 | tmp = lcd_cfg->xres; | |
278 | tmp += lcd_cfg->right_margin; | |
279 | tmp /= 8; /* HSYNP */ | |
280 | tmp |= (lcd_cfg->hsync_len / 8) << 16; /* HSYNW */ | |
281 | lcdc_write_chan(ch, LDHSYNR, tmp); | |
282 | ||
283 | /* power supply */ | |
284 | lcdc_write_chan(ch, LDPMR, 0); | |
285 | ||
286 | /* vertical configuration */ | |
287 | tmp = lcd_cfg->yres + lcd_cfg->vsync_len; | |
288 | tmp += lcd_cfg->upper_margin; | |
289 | tmp += lcd_cfg->lower_margin; /* VTLN */ | |
290 | tmp |= lcd_cfg->yres << 16; /* VDLN */ | |
291 | lcdc_write_chan(ch, LDVLNR, tmp); | |
292 | ||
293 | tmp = lcd_cfg->yres; | |
294 | tmp += lcd_cfg->lower_margin; /* VSYNP */ | |
295 | tmp |= lcd_cfg->vsync_len << 16; /* VSYNW */ | |
296 | lcdc_write_chan(ch, LDVSYNR, tmp); | |
297 | ||
298 | board_cfg = &ch->cfg.board_cfg; | |
299 | if (board_cfg->setup_sys) | |
300 | ret = board_cfg->setup_sys(board_cfg->board_data, ch, | |
301 | &sh_mobile_lcdc_sys_bus_ops); | |
302 | if (ret) | |
303 | return ret; | |
304 | } | |
305 | ||
306 | /* --- display_lcdc_data() --- */ | |
307 | lcdc_write(priv, _LDINTR, 0x00000f00); | |
308 | ||
309 | /* word and long word swap */ | |
310 | lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 6); | |
311 | ||
312 | for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { | |
313 | ch = &priv->ch[k]; | |
314 | ||
315 | if (!priv->ch[k].enabled) | |
316 | continue; | |
317 | ||
318 | /* set bpp format in PKF[4:0] */ | |
319 | tmp = lcdc_read_chan(ch, LDDFR); | |
320 | tmp &= ~(0x0001001f); | |
321 | tmp |= (priv->ch[k].info.var.bits_per_pixel == 16) ? 3 : 0; | |
322 | lcdc_write_chan(ch, LDDFR, tmp); | |
323 | ||
324 | /* point out our frame buffer */ | |
325 | lcdc_write_chan(ch, LDSA1R, ch->info.fix.smem_start); | |
326 | ||
327 | /* set line size */ | |
328 | lcdc_write_chan(ch, LDMLSR, ch->info.fix.line_length); | |
329 | ||
330 | /* continuous read mode */ | |
331 | lcdc_write_chan(ch, LDSM1R, 0); | |
332 | } | |
333 | ||
334 | /* display output */ | |
335 | lcdc_write(priv, _LDCNT1R, LCDC_ENABLE); | |
336 | ||
337 | /* start the lcdc */ | |
338 | sh_mobile_lcdc_start_stop(priv, 1); | |
339 | ||
340 | /* tell the board code to enable the panel */ | |
341 | for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { | |
342 | ch = &priv->ch[k]; | |
343 | board_cfg = &ch->cfg.board_cfg; | |
344 | if (board_cfg->display_on) | |
345 | board_cfg->display_on(board_cfg->board_data); | |
346 | } | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
351 | static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv) | |
352 | { | |
353 | struct sh_mobile_lcdc_chan *ch; | |
354 | struct sh_mobile_lcdc_board_cfg *board_cfg; | |
355 | int k; | |
356 | ||
357 | /* tell the board code to disable the panel */ | |
358 | for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { | |
359 | ch = &priv->ch[k]; | |
360 | board_cfg = &ch->cfg.board_cfg; | |
361 | if (board_cfg->display_off) | |
362 | board_cfg->display_off(board_cfg->board_data); | |
363 | } | |
364 | ||
365 | /* stop the lcdc */ | |
366 | sh_mobile_lcdc_start_stop(priv, 0); | |
367 | } | |
368 | ||
369 | static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch) | |
370 | { | |
371 | int ifm, miftyp; | |
372 | ||
373 | switch (ch->cfg.interface_type) { | |
374 | case RGB8: ifm = 0; miftyp = 0; break; | |
375 | case RGB9: ifm = 0; miftyp = 4; break; | |
376 | case RGB12A: ifm = 0; miftyp = 5; break; | |
377 | case RGB12B: ifm = 0; miftyp = 6; break; | |
378 | case RGB16: ifm = 0; miftyp = 7; break; | |
379 | case RGB18: ifm = 0; miftyp = 10; break; | |
380 | case RGB24: ifm = 0; miftyp = 11; break; | |
381 | case SYS8A: ifm = 1; miftyp = 0; break; | |
382 | case SYS8B: ifm = 1; miftyp = 1; break; | |
383 | case SYS8C: ifm = 1; miftyp = 2; break; | |
384 | case SYS8D: ifm = 1; miftyp = 3; break; | |
385 | case SYS9: ifm = 1; miftyp = 4; break; | |
386 | case SYS12: ifm = 1; miftyp = 5; break; | |
387 | case SYS16A: ifm = 1; miftyp = 7; break; | |
388 | case SYS16B: ifm = 1; miftyp = 8; break; | |
389 | case SYS16C: ifm = 1; miftyp = 9; break; | |
390 | case SYS18: ifm = 1; miftyp = 10; break; | |
391 | case SYS24: ifm = 1; miftyp = 11; break; | |
392 | default: goto bad; | |
393 | } | |
394 | ||
395 | /* SUBLCD only supports SYS interface */ | |
396 | if (lcdc_chan_is_sublcd(ch)) { | |
397 | if (ifm == 0) | |
398 | goto bad; | |
399 | else | |
400 | ifm = 0; | |
401 | } | |
402 | ||
403 | ch->ldmt1r_value = (ifm << 12) | miftyp; | |
404 | return 0; | |
405 | bad: | |
406 | return -EINVAL; | |
407 | } | |
408 | ||
409 | static int sh_mobile_lcdc_setup_clocks(struct device *dev, int clock_source, | |
410 | struct sh_mobile_lcdc_priv *priv) | |
411 | { | |
412 | char *str; | |
413 | int icksel; | |
414 | ||
415 | switch (clock_source) { | |
416 | case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break; | |
417 | case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break; | |
418 | case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break; | |
419 | default: | |
420 | return -EINVAL; | |
421 | } | |
422 | ||
423 | priv->lddckr = icksel << 16; | |
424 | ||
425 | if (str) { | |
426 | priv->clk = clk_get(dev, str); | |
427 | if (IS_ERR(priv->clk)) { | |
428 | dev_err(dev, "cannot get clock %s\n", str); | |
429 | return PTR_ERR(priv->clk); | |
430 | } | |
431 | ||
432 | clk_enable(priv->clk); | |
433 | } | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
438 | static int sh_mobile_lcdc_setcolreg(u_int regno, | |
439 | u_int red, u_int green, u_int blue, | |
440 | u_int transp, struct fb_info *info) | |
441 | { | |
442 | u32 *palette = info->pseudo_palette; | |
443 | ||
444 | if (regno >= PALETTE_NR) | |
445 | return -EINVAL; | |
446 | ||
447 | /* only FB_VISUAL_TRUECOLOR supported */ | |
448 | ||
449 | red >>= 16 - info->var.red.length; | |
450 | green >>= 16 - info->var.green.length; | |
451 | blue >>= 16 - info->var.blue.length; | |
452 | transp >>= 16 - info->var.transp.length; | |
453 | ||
454 | palette[regno] = (red << info->var.red.offset) | | |
455 | (green << info->var.green.offset) | | |
456 | (blue << info->var.blue.offset) | | |
457 | (transp << info->var.transp.offset); | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
462 | static struct fb_fix_screeninfo sh_mobile_lcdc_fix = { | |
463 | .id = "SH Mobile LCDC", | |
464 | .type = FB_TYPE_PACKED_PIXELS, | |
465 | .visual = FB_VISUAL_TRUECOLOR, | |
466 | .accel = FB_ACCEL_NONE, | |
467 | }; | |
468 | ||
469 | static struct fb_ops sh_mobile_lcdc_ops = { | |
470 | .fb_setcolreg = sh_mobile_lcdc_setcolreg, | |
471 | .fb_fillrect = cfb_fillrect, | |
472 | .fb_copyarea = cfb_copyarea, | |
473 | .fb_imageblit = cfb_imageblit, | |
474 | }; | |
475 | ||
476 | static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp) | |
477 | { | |
478 | switch (bpp) { | |
479 | case 16: /* PKF[4:0] = 00011 - RGB 565 */ | |
480 | var->red.offset = 11; | |
481 | var->red.length = 5; | |
482 | var->green.offset = 5; | |
483 | var->green.length = 6; | |
484 | var->blue.offset = 0; | |
485 | var->blue.length = 5; | |
486 | var->transp.offset = 0; | |
487 | var->transp.length = 0; | |
488 | break; | |
489 | ||
490 | case 32: /* PKF[4:0] = 00000 - RGB 888 | |
491 | * sh7722 pdf says 00RRGGBB but reality is GGBB00RR | |
492 | * this may be because LDDDSR has word swap enabled.. | |
493 | */ | |
494 | var->red.offset = 0; | |
495 | var->red.length = 8; | |
496 | var->green.offset = 24; | |
497 | var->green.length = 8; | |
498 | var->blue.offset = 16; | |
499 | var->blue.length = 8; | |
500 | var->transp.offset = 0; | |
501 | var->transp.length = 0; | |
502 | break; | |
503 | default: | |
504 | return -EINVAL; | |
505 | } | |
506 | var->bits_per_pixel = bpp; | |
507 | var->red.msb_right = 0; | |
508 | var->green.msb_right = 0; | |
509 | var->blue.msb_right = 0; | |
510 | var->transp.msb_right = 0; | |
511 | return 0; | |
512 | } | |
513 | ||
514 | static int sh_mobile_lcdc_remove(struct platform_device *pdev); | |
515 | ||
516 | static int __init sh_mobile_lcdc_probe(struct platform_device *pdev) | |
517 | { | |
518 | struct fb_info *info; | |
519 | struct sh_mobile_lcdc_priv *priv; | |
520 | struct sh_mobile_lcdc_info *pdata; | |
521 | struct sh_mobile_lcdc_chan_cfg *cfg; | |
522 | struct resource *res; | |
523 | int error; | |
524 | void *buf; | |
525 | int i, j; | |
526 | ||
527 | if (!pdev->dev.platform_data) { | |
528 | dev_err(&pdev->dev, "no platform data defined\n"); | |
529 | error = -EINVAL; | |
530 | goto err0; | |
531 | } | |
532 | ||
533 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
534 | if (res == NULL) { | |
535 | dev_err(&pdev->dev, "cannot find IO resource\n"); | |
536 | error = -ENOENT; | |
537 | goto err0; | |
538 | } | |
539 | ||
540 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
541 | if (!priv) { | |
542 | dev_err(&pdev->dev, "cannot allocate device data\n"); | |
543 | error = -ENOMEM; | |
544 | goto err0; | |
545 | } | |
546 | ||
547 | platform_set_drvdata(pdev, priv); | |
548 | pdata = pdev->dev.platform_data; | |
549 | ||
550 | j = 0; | |
551 | for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) { | |
552 | priv->ch[j].lcdc = priv; | |
553 | memcpy(&priv->ch[j].cfg, &pdata->ch[i], sizeof(pdata->ch[i])); | |
554 | ||
555 | error = sh_mobile_lcdc_check_interface(&priv->ch[i]); | |
556 | if (error) { | |
557 | dev_err(&pdev->dev, "unsupported interface type\n"); | |
558 | goto err1; | |
559 | } | |
560 | ||
561 | switch (pdata->ch[i].chan) { | |
562 | case LCDC_CHAN_MAINLCD: | |
563 | priv->ch[j].enabled = 1 << 1; | |
564 | priv->ch[j].reg_offs = lcdc_offs_mainlcd; | |
565 | j++; | |
566 | break; | |
567 | case LCDC_CHAN_SUBLCD: | |
568 | priv->ch[j].enabled = 1 << 2; | |
569 | priv->ch[j].reg_offs = lcdc_offs_sublcd; | |
570 | j++; | |
571 | break; | |
572 | } | |
573 | } | |
574 | ||
575 | if (!j) { | |
576 | dev_err(&pdev->dev, "no channels defined\n"); | |
577 | error = -EINVAL; | |
578 | goto err1; | |
579 | } | |
580 | ||
581 | error = sh_mobile_lcdc_setup_clocks(&pdev->dev, | |
582 | pdata->clock_source, priv); | |
583 | if (error) { | |
584 | dev_err(&pdev->dev, "unable to setup clocks\n"); | |
585 | goto err1; | |
586 | } | |
587 | ||
588 | priv->lddckr = pdata->lddckr; | |
589 | priv->base = ioremap_nocache(res->start, (res->end - res->start) + 1); | |
590 | ||
591 | for (i = 0; i < j; i++) { | |
592 | info = &priv->ch[i].info; | |
593 | cfg = &priv->ch[i].cfg; | |
594 | ||
595 | info->fbops = &sh_mobile_lcdc_ops; | |
596 | info->var.xres = info->var.xres_virtual = cfg->lcd_cfg.xres; | |
597 | info->var.yres = info->var.yres_virtual = cfg->lcd_cfg.yres; | |
598 | info->var.activate = FB_ACTIVATE_NOW; | |
599 | error = sh_mobile_lcdc_set_bpp(&info->var, cfg->bpp); | |
600 | if (error) | |
601 | break; | |
602 | ||
603 | info->fix = sh_mobile_lcdc_fix; | |
604 | info->fix.line_length = cfg->lcd_cfg.xres * (cfg->bpp / 8); | |
605 | info->fix.smem_len = info->fix.line_length * cfg->lcd_cfg.yres; | |
606 | ||
607 | buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len, | |
608 | &priv->ch[i].dma_handle, GFP_KERNEL); | |
609 | if (!buf) { | |
610 | dev_err(&pdev->dev, "unable to allocate buffer\n"); | |
611 | error = -ENOMEM; | |
612 | break; | |
613 | } | |
614 | ||
615 | info->pseudo_palette = &priv->ch[i].pseudo_palette; | |
616 | info->flags = FBINFO_FLAG_DEFAULT; | |
617 | ||
618 | error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0); | |
619 | if (error < 0) { | |
620 | dev_err(&pdev->dev, "unable to allocate cmap\n"); | |
621 | dma_free_coherent(&pdev->dev, info->fix.smem_len, | |
622 | buf, priv->ch[i].dma_handle); | |
623 | break; | |
624 | } | |
625 | ||
626 | memset(buf, 0, info->fix.smem_len); | |
627 | info->fix.smem_start = priv->ch[i].dma_handle; | |
628 | info->screen_base = buf; | |
629 | info->device = &pdev->dev; | |
630 | } | |
631 | ||
632 | if (error) | |
633 | goto err1; | |
634 | ||
635 | error = sh_mobile_lcdc_start(priv); | |
636 | if (error) { | |
637 | dev_err(&pdev->dev, "unable to start hardware\n"); | |
638 | goto err1; | |
639 | } | |
640 | ||
641 | for (i = 0; i < j; i++) { | |
642 | error = register_framebuffer(&priv->ch[i].info); | |
643 | if (error < 0) | |
644 | goto err1; | |
645 | } | |
646 | ||
647 | for (i = 0; i < j; i++) { | |
648 | info = &priv->ch[i].info; | |
649 | dev_info(info->dev, | |
650 | "registered %s/%s as %dx%d %dbpp.\n", | |
651 | pdev->name, | |
652 | (priv->ch[i].cfg.chan == LCDC_CHAN_MAINLCD) ? | |
653 | "mainlcd" : "sublcd", | |
654 | (int) priv->ch[i].cfg.lcd_cfg.xres, | |
655 | (int) priv->ch[i].cfg.lcd_cfg.yres, | |
656 | priv->ch[i].cfg.bpp); | |
657 | } | |
658 | ||
659 | return 0; | |
660 | err1: | |
661 | sh_mobile_lcdc_remove(pdev); | |
662 | err0: | |
663 | return error; | |
664 | } | |
665 | ||
666 | static int sh_mobile_lcdc_remove(struct platform_device *pdev) | |
667 | { | |
668 | struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev); | |
669 | struct fb_info *info; | |
670 | int i; | |
671 | ||
672 | for (i = 0; i < ARRAY_SIZE(priv->ch); i++) | |
673 | if (priv->ch[i].info.dev) | |
674 | unregister_framebuffer(&priv->ch[i].info); | |
675 | ||
676 | sh_mobile_lcdc_stop(priv); | |
677 | ||
678 | for (i = 0; i < ARRAY_SIZE(priv->ch); i++) { | |
679 | info = &priv->ch[i].info; | |
680 | ||
681 | if (!info->device) | |
682 | continue; | |
683 | ||
684 | dma_free_coherent(&pdev->dev, info->fix.smem_len, | |
685 | info->screen_base, priv->ch[i].dma_handle); | |
686 | fb_dealloc_cmap(&info->cmap); | |
687 | } | |
688 | ||
689 | if (priv->clk) { | |
690 | clk_disable(priv->clk); | |
691 | clk_put(priv->clk); | |
692 | } | |
693 | ||
694 | if (priv->base) | |
695 | iounmap(priv->base); | |
696 | ||
697 | kfree(priv); | |
698 | return 0; | |
699 | } | |
700 | ||
701 | static struct platform_driver sh_mobile_lcdc_driver = { | |
702 | .driver = { | |
703 | .name = "sh_mobile_lcdc_fb", | |
704 | .owner = THIS_MODULE, | |
705 | }, | |
706 | .probe = sh_mobile_lcdc_probe, | |
707 | .remove = sh_mobile_lcdc_remove, | |
708 | }; | |
709 | ||
710 | static int __init sh_mobile_lcdc_init(void) | |
711 | { | |
712 | return platform_driver_register(&sh_mobile_lcdc_driver); | |
713 | } | |
714 | ||
715 | static void __exit sh_mobile_lcdc_exit(void) | |
716 | { | |
717 | platform_driver_unregister(&sh_mobile_lcdc_driver); | |
718 | } | |
719 | ||
720 | module_init(sh_mobile_lcdc_init); | |
721 | module_exit(sh_mobile_lcdc_exit); | |
722 | ||
723 | MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver"); | |
724 | MODULE_AUTHOR("Magnus Damm <damm@opensource.se>"); | |
725 | MODULE_LICENSE("GPL v2"); |