1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/module.h>
3 #include <linux/kernel.h>
4 #include <linux/errno.h>
5 #include <linux/string.h>
6 #include <linux/mm.h>
7 #include <linux/slab.h>
8 #include <linux/delay.h>
9 #include <linux/fb.h>
10 #include <linux/ioport.h>
11 #include <linux/init.h>
12 #include <linux/pci.h>
13 #include <linux/vmalloc.h>
14 #include <linux/pagemap.h>
15 #include <linux/console.h>
16 #ifdef CONFIG_MTRR
17 #include <asm/mtrr.h>
18 #endif
19 #include <linux/platform_device.h>
20 #include <linux/screen_info.h>
21 #include <linux/sizes.h>
22
23 #include "sm750.h"
24 #include "ddk750.h"
25 #include "sm750_accel.h"
26
27 void __iomem *mmio750;
28
hw_sm750_map(struct sm750_dev * sm750_dev,struct pci_dev * pdev)29 int hw_sm750_map(struct sm750_dev *sm750_dev, struct pci_dev *pdev)
30 {
31 int ret;
32
33 ret = 0;
34
35 sm750_dev->vidreg_start = pci_resource_start(pdev, 1);
36 sm750_dev->vidreg_size = SZ_2M;
37
38 pr_info("mmio phyAddr = %lx\n", sm750_dev->vidreg_start);
39
40 /*
41 * reserve the vidreg space of smi adaptor
42 * if you do this, you need to add release region code
43 * in lynxfb_remove, or memory will not be mapped again
44 * successfully
45 */
46 ret = pci_request_region(pdev, 1, "sm750fb");
47 if (ret) {
48 pr_err("Can not request PCI regions.\n");
49 goto exit;
50 }
51
52 /* now map mmio and vidmem */
53 sm750_dev->pvReg = ioremap_nocache(sm750_dev->vidreg_start,
54 sm750_dev->vidreg_size);
55 if (!sm750_dev->pvReg) {
56 pr_err("mmio failed\n");
57 ret = -EFAULT;
58 goto exit;
59 } else {
60 pr_info("mmio virtual addr = %p\n", sm750_dev->pvReg);
61 }
62
63 sm750_dev->accel.dprBase = sm750_dev->pvReg + DE_BASE_ADDR_TYPE1;
64 sm750_dev->accel.dpPortBase = sm750_dev->pvReg + DE_PORT_ADDR_TYPE1;
65
66 mmio750 = sm750_dev->pvReg;
67 sm750_set_chip_type(sm750_dev->devid, sm750_dev->revid);
68
69 sm750_dev->vidmem_start = pci_resource_start(pdev, 0);
70 /*
71 * don't use pdev_resource[x].end - resource[x].start to
72 * calculate the resource size, it's only the maximum available
73 * size but not the actual size, using
74 * @ddk750_get_vm_size function can be safe.
75 */
76 sm750_dev->vidmem_size = ddk750_get_vm_size();
77 pr_info("video memory phyAddr = %lx, size = %u bytes\n",
78 sm750_dev->vidmem_start, sm750_dev->vidmem_size);
79
80 /* reserve the vidmem space of smi adaptor */
81 sm750_dev->pvMem = ioremap_wc(sm750_dev->vidmem_start,
82 sm750_dev->vidmem_size);
83 if (!sm750_dev->pvMem) {
84 pr_err("Map video memory failed\n");
85 ret = -EFAULT;
86 goto exit;
87 } else {
88 pr_info("video memory vaddr = %p\n", sm750_dev->pvMem);
89 }
90 exit:
91 return ret;
92 }
93
hw_sm750_inithw(struct sm750_dev * sm750_dev,struct pci_dev * pdev)94 int hw_sm750_inithw(struct sm750_dev *sm750_dev, struct pci_dev *pdev)
95 {
96 struct init_status *parm;
97
98 parm = &sm750_dev->initParm;
99 if (parm->chip_clk == 0)
100 parm->chip_clk = (sm750_get_chip_type() == SM750LE) ?
101 DEFAULT_SM750LE_CHIP_CLOCK :
102 DEFAULT_SM750_CHIP_CLOCK;
103
104 if (parm->mem_clk == 0)
105 parm->mem_clk = parm->chip_clk;
106 if (parm->master_clk == 0)
107 parm->master_clk = parm->chip_clk / 3;
108
109 ddk750_init_hw((struct initchip_param *)&sm750_dev->initParm);
110 /* for sm718, open pci burst */
111 if (sm750_dev->devid == 0x718) {
112 poke32(SYSTEM_CTRL,
113 peek32(SYSTEM_CTRL) | SYSTEM_CTRL_PCI_BURST);
114 }
115
116 if (sm750_get_chip_type() != SM750LE) {
117 unsigned int val;
118 /* does user need CRT? */
119 if (sm750_dev->nocrt) {
120 poke32(MISC_CTRL,
121 peek32(MISC_CTRL) | MISC_CTRL_DAC_POWER_OFF);
122 /* shut off dpms */
123 val = peek32(SYSTEM_CTRL) & ~SYSTEM_CTRL_DPMS_MASK;
124 val |= SYSTEM_CTRL_DPMS_VPHN;
125 poke32(SYSTEM_CTRL, val);
126 } else {
127 poke32(MISC_CTRL,
128 peek32(MISC_CTRL) & ~MISC_CTRL_DAC_POWER_OFF);
129 /* turn on dpms */
130 val = peek32(SYSTEM_CTRL) & ~SYSTEM_CTRL_DPMS_MASK;
131 val |= SYSTEM_CTRL_DPMS_VPHP;
132 poke32(SYSTEM_CTRL, val);
133 }
134
135 val = peek32(PANEL_DISPLAY_CTRL) &
136 ~(PANEL_DISPLAY_CTRL_DUAL_DISPLAY |
137 PANEL_DISPLAY_CTRL_DOUBLE_PIXEL);
138 switch (sm750_dev->pnltype) {
139 case sm750_24TFT:
140 break;
141 case sm750_doubleTFT:
142 val |= PANEL_DISPLAY_CTRL_DOUBLE_PIXEL;
143 break;
144 case sm750_dualTFT:
145 val |= PANEL_DISPLAY_CTRL_DUAL_DISPLAY;
146 break;
147 }
148 poke32(PANEL_DISPLAY_CTRL, val);
149 } else {
150 /*
151 * for 750LE, no DVI chip initialization
152 * makes Monitor no signal
153 *
154 * Set up GPIO for software I2C to program DVI chip in the
155 * Xilinx SP605 board, in order to have video signal.
156 */
157 sm750_sw_i2c_init(0, 1);
158
159 /*
160 * Customer may NOT use CH7301 DVI chip, which has to be
161 * initialized differently.
162 */
163 if (sm750_sw_i2c_read_reg(0xec, 0x4a) == 0x95) {
164 /*
165 * The following register values for CH7301 are from
166 * Chrontel app note and our experiment.
167 */
168 pr_info("yes,CH7301 DVI chip found\n");
169 sm750_sw_i2c_write_reg(0xec, 0x1d, 0x16);
170 sm750_sw_i2c_write_reg(0xec, 0x21, 0x9);
171 sm750_sw_i2c_write_reg(0xec, 0x49, 0xC0);
172 pr_info("okay,CH7301 DVI chip setup done\n");
173 }
174 }
175
176 /* init 2d engine */
177 if (!sm750_dev->accel_off)
178 hw_sm750_initAccel(sm750_dev);
179
180 return 0;
181 }
182
hw_sm750_output_setMode(struct lynxfb_output * output,struct fb_var_screeninfo * var,struct fb_fix_screeninfo * fix)183 int hw_sm750_output_setMode(struct lynxfb_output *output,
184 struct fb_var_screeninfo *var,
185 struct fb_fix_screeninfo *fix)
186 {
187 int ret;
188 enum disp_output disp_set;
189 int channel;
190
191 ret = 0;
192 disp_set = 0;
193 channel = *output->channel;
194
195 if (sm750_get_chip_type() != SM750LE) {
196 if (channel == sm750_primary) {
197 pr_info("primary channel\n");
198 if (output->paths & sm750_panel)
199 disp_set |= do_LCD1_PRI;
200 if (output->paths & sm750_crt)
201 disp_set |= do_CRT_PRI;
202
203 } else {
204 pr_info("secondary channel\n");
205 if (output->paths & sm750_panel)
206 disp_set |= do_LCD1_SEC;
207 if (output->paths & sm750_crt)
208 disp_set |= do_CRT_SEC;
209 }
210 ddk750_set_logical_disp_out(disp_set);
211 } else {
212 /* just open DISPLAY_CONTROL_750LE register bit 3:0 */
213 u32 reg;
214
215 reg = peek32(DISPLAY_CONTROL_750LE);
216 reg |= 0xf;
217 poke32(DISPLAY_CONTROL_750LE, reg);
218 }
219
220 pr_info("ddk setlogicdispout done\n");
221 return ret;
222 }
223
hw_sm750_crtc_checkMode(struct lynxfb_crtc * crtc,struct fb_var_screeninfo * var)224 int hw_sm750_crtc_checkMode(struct lynxfb_crtc *crtc,
225 struct fb_var_screeninfo *var)
226 {
227 struct sm750_dev *sm750_dev;
228 struct lynxfb_par *par = container_of(crtc, struct lynxfb_par, crtc);
229
230 sm750_dev = par->dev;
231
232 switch (var->bits_per_pixel) {
233 case 8:
234 case 16:
235 break;
236 case 32:
237 if (sm750_dev->revid == SM750LE_REVISION_ID) {
238 pr_debug("750le do not support 32bpp\n");
239 return -EINVAL;
240 }
241 break;
242 default:
243 return -EINVAL;
244 }
245
246 return 0;
247 }
248
249 /* set the controller's mode for @crtc charged with @var and @fix parameters */
hw_sm750_crtc_setMode(struct lynxfb_crtc * crtc,struct fb_var_screeninfo * var,struct fb_fix_screeninfo * fix)250 int hw_sm750_crtc_setMode(struct lynxfb_crtc *crtc,
251 struct fb_var_screeninfo *var,
252 struct fb_fix_screeninfo *fix)
253 {
254 int ret, fmt;
255 u32 reg;
256 struct mode_parameter modparm;
257 enum clock_type clock;
258 struct sm750_dev *sm750_dev;
259 struct lynxfb_par *par;
260
261 ret = 0;
262 par = container_of(crtc, struct lynxfb_par, crtc);
263 sm750_dev = par->dev;
264
265 if (!sm750_dev->accel_off) {
266 /* set 2d engine pixel format according to mode bpp */
267 switch (var->bits_per_pixel) {
268 case 8:
269 fmt = 0;
270 break;
271 case 16:
272 fmt = 1;
273 break;
274 case 32:
275 default:
276 fmt = 2;
277 break;
278 }
279 sm750_hw_set2dformat(&sm750_dev->accel, fmt);
280 }
281
282 /* set timing */
283 modparm.pixel_clock = ps_to_hz(var->pixclock);
284 modparm.vertical_sync_polarity = (var->sync & FB_SYNC_HOR_HIGH_ACT)
285 ? POS : NEG;
286 modparm.horizontal_sync_polarity = (var->sync & FB_SYNC_VERT_HIGH_ACT)
287 ? POS : NEG;
288 modparm.clock_phase_polarity = (var->sync & FB_SYNC_COMP_HIGH_ACT)
289 ? POS : NEG;
290 modparm.horizontal_display_end = var->xres;
291 modparm.horizontal_sync_width = var->hsync_len;
292 modparm.horizontal_sync_start = var->xres + var->right_margin;
293 modparm.horizontal_total = var->xres + var->left_margin +
294 var->right_margin + var->hsync_len;
295 modparm.vertical_display_end = var->yres;
296 modparm.vertical_sync_height = var->vsync_len;
297 modparm.vertical_sync_start = var->yres + var->lower_margin;
298 modparm.vertical_total = var->yres + var->upper_margin +
299 var->lower_margin + var->vsync_len;
300
301 /* choose pll */
302 if (crtc->channel != sm750_secondary)
303 clock = PRIMARY_PLL;
304 else
305 clock = SECONDARY_PLL;
306
307 pr_debug("Request pixel clock = %lu\n", modparm.pixel_clock);
308 ret = ddk750_setModeTiming(&modparm, clock);
309 if (ret) {
310 pr_err("Set mode timing failed\n");
311 goto exit;
312 }
313
314 if (crtc->channel != sm750_secondary) {
315 /* set pitch, offset, width, start address, etc... */
316 poke32(PANEL_FB_ADDRESS,
317 crtc->oScreen & PANEL_FB_ADDRESS_ADDRESS_MASK);
318
319 reg = var->xres * (var->bits_per_pixel >> 3);
320 /*
321 * crtc->channel is not equal to par->index on numeric,
322 * be aware of that
323 */
324 reg = ALIGN(reg, crtc->line_pad);
325 reg = (reg << PANEL_FB_WIDTH_WIDTH_SHIFT) &
326 PANEL_FB_WIDTH_WIDTH_MASK;
327 reg |= (fix->line_length & PANEL_FB_WIDTH_OFFSET_MASK);
328 poke32(PANEL_FB_WIDTH, reg);
329
330 reg = ((var->xres - 1) << PANEL_WINDOW_WIDTH_WIDTH_SHIFT) &
331 PANEL_WINDOW_WIDTH_WIDTH_MASK;
332 reg |= (var->xoffset & PANEL_WINDOW_WIDTH_X_MASK);
333 poke32(PANEL_WINDOW_WIDTH, reg);
334
335 reg = (var->yres_virtual - 1) <<
336 PANEL_WINDOW_HEIGHT_HEIGHT_SHIFT;
337 reg &= PANEL_WINDOW_HEIGHT_HEIGHT_MASK;
338 reg |= (var->yoffset & PANEL_WINDOW_HEIGHT_Y_MASK);
339 poke32(PANEL_WINDOW_HEIGHT, reg);
340
341 poke32(PANEL_PLANE_TL, 0);
342
343 reg = ((var->yres - 1) << PANEL_PLANE_BR_BOTTOM_SHIFT) &
344 PANEL_PLANE_BR_BOTTOM_MASK;
345 reg |= ((var->xres - 1) & PANEL_PLANE_BR_RIGHT_MASK);
346 poke32(PANEL_PLANE_BR, reg);
347
348 /* set pixel format */
349 reg = peek32(PANEL_DISPLAY_CTRL);
350 poke32(PANEL_DISPLAY_CTRL, reg | (var->bits_per_pixel >> 4));
351 } else {
352 /* not implemented now */
353 poke32(CRT_FB_ADDRESS, crtc->oScreen);
354 reg = var->xres * (var->bits_per_pixel >> 3);
355 /*
356 * crtc->channel is not equal to par->index on numeric,
357 * be aware of that
358 */
359 reg = ALIGN(reg, crtc->line_pad) << CRT_FB_WIDTH_WIDTH_SHIFT;
360 reg &= CRT_FB_WIDTH_WIDTH_MASK;
361 reg |= (fix->line_length & CRT_FB_WIDTH_OFFSET_MASK);
362 poke32(CRT_FB_WIDTH, reg);
363
364 /* SET PIXEL FORMAT */
365 reg = peek32(CRT_DISPLAY_CTRL);
366 reg |= ((var->bits_per_pixel >> 4) &
367 CRT_DISPLAY_CTRL_FORMAT_MASK);
368 poke32(CRT_DISPLAY_CTRL, reg);
369 }
370
371 exit:
372 return ret;
373 }
374
hw_sm750_setColReg(struct lynxfb_crtc * crtc,ushort index,ushort red,ushort green,ushort blue)375 int hw_sm750_setColReg(struct lynxfb_crtc *crtc, ushort index,
376 ushort red, ushort green, ushort blue)
377 {
378 static unsigned int add[] = {PANEL_PALETTE_RAM, CRT_PALETTE_RAM};
379
380 poke32(add[crtc->channel] + index * 4,
381 (red << 16) | (green << 8) | blue);
382 return 0;
383 }
384
hw_sm750le_setBLANK(struct lynxfb_output * output,int blank)385 int hw_sm750le_setBLANK(struct lynxfb_output *output, int blank)
386 {
387 int dpms, crtdb;
388
389 switch (blank) {
390 case FB_BLANK_UNBLANK:
391 dpms = CRT_DISPLAY_CTRL_DPMS_0;
392 crtdb = 0;
393 break;
394 case FB_BLANK_NORMAL:
395 dpms = CRT_DISPLAY_CTRL_DPMS_0;
396 crtdb = CRT_DISPLAY_CTRL_BLANK;
397 break;
398 case FB_BLANK_VSYNC_SUSPEND:
399 dpms = CRT_DISPLAY_CTRL_DPMS_2;
400 crtdb = CRT_DISPLAY_CTRL_BLANK;
401 break;
402 case FB_BLANK_HSYNC_SUSPEND:
403 dpms = CRT_DISPLAY_CTRL_DPMS_1;
404 crtdb = CRT_DISPLAY_CTRL_BLANK;
405 break;
406 case FB_BLANK_POWERDOWN:
407 dpms = CRT_DISPLAY_CTRL_DPMS_3;
408 crtdb = CRT_DISPLAY_CTRL_BLANK;
409 break;
410 default:
411 return -EINVAL;
412 }
413
414 if (output->paths & sm750_crt) {
415 unsigned int val;
416
417 val = peek32(CRT_DISPLAY_CTRL) & ~CRT_DISPLAY_CTRL_DPMS_MASK;
418 poke32(CRT_DISPLAY_CTRL, val | dpms);
419
420 val = peek32(CRT_DISPLAY_CTRL) & ~CRT_DISPLAY_CTRL_BLANK;
421 poke32(CRT_DISPLAY_CTRL, val | crtdb);
422 }
423 return 0;
424 }
425
hw_sm750_setBLANK(struct lynxfb_output * output,int blank)426 int hw_sm750_setBLANK(struct lynxfb_output *output, int blank)
427 {
428 unsigned int dpms, pps, crtdb;
429
430 dpms = 0;
431 pps = 0;
432 crtdb = 0;
433
434 switch (blank) {
435 case FB_BLANK_UNBLANK:
436 pr_debug("flag = FB_BLANK_UNBLANK\n");
437 dpms = SYSTEM_CTRL_DPMS_VPHP;
438 pps = PANEL_DISPLAY_CTRL_DATA;
439 break;
440 case FB_BLANK_NORMAL:
441 pr_debug("flag = FB_BLANK_NORMAL\n");
442 dpms = SYSTEM_CTRL_DPMS_VPHP;
443 crtdb = CRT_DISPLAY_CTRL_BLANK;
444 break;
445 case FB_BLANK_VSYNC_SUSPEND:
446 dpms = SYSTEM_CTRL_DPMS_VNHP;
447 crtdb = CRT_DISPLAY_CTRL_BLANK;
448 break;
449 case FB_BLANK_HSYNC_SUSPEND:
450 dpms = SYSTEM_CTRL_DPMS_VPHN;
451 crtdb = CRT_DISPLAY_CTRL_BLANK;
452 break;
453 case FB_BLANK_POWERDOWN:
454 dpms = SYSTEM_CTRL_DPMS_VNHN;
455 crtdb = CRT_DISPLAY_CTRL_BLANK;
456 break;
457 }
458
459 if (output->paths & sm750_crt) {
460 unsigned int val = peek32(SYSTEM_CTRL) & ~SYSTEM_CTRL_DPMS_MASK;
461
462 poke32(SYSTEM_CTRL, val | dpms);
463
464 val = peek32(CRT_DISPLAY_CTRL) & ~CRT_DISPLAY_CTRL_BLANK;
465 poke32(CRT_DISPLAY_CTRL, val | crtdb);
466 }
467
468 if (output->paths & sm750_panel) {
469 unsigned int val = peek32(PANEL_DISPLAY_CTRL);
470
471 val &= ~PANEL_DISPLAY_CTRL_DATA;
472 val |= pps;
473 poke32(PANEL_DISPLAY_CTRL, val);
474 }
475
476 return 0;
477 }
478
hw_sm750_initAccel(struct sm750_dev * sm750_dev)479 void hw_sm750_initAccel(struct sm750_dev *sm750_dev)
480 {
481 u32 reg;
482
483 sm750_enable_2d_engine(1);
484
485 if (sm750_get_chip_type() == SM750LE) {
486 reg = peek32(DE_STATE1);
487 reg |= DE_STATE1_DE_ABORT;
488 poke32(DE_STATE1, reg);
489
490 reg = peek32(DE_STATE1);
491 reg &= ~DE_STATE1_DE_ABORT;
492 poke32(DE_STATE1, reg);
493
494 } else {
495 /* engine reset */
496 reg = peek32(SYSTEM_CTRL);
497 reg |= SYSTEM_CTRL_DE_ABORT;
498 poke32(SYSTEM_CTRL, reg);
499
500 reg = peek32(SYSTEM_CTRL);
501 reg &= ~SYSTEM_CTRL_DE_ABORT;
502 poke32(SYSTEM_CTRL, reg);
503 }
504
505 /* call 2d init */
506 sm750_dev->accel.de_init(&sm750_dev->accel);
507 }
508
hw_sm750le_deWait(void)509 int hw_sm750le_deWait(void)
510 {
511 int i = 0x10000000;
512 unsigned int mask = DE_STATE2_DE_STATUS_BUSY | DE_STATE2_DE_FIFO_EMPTY |
513 DE_STATE2_DE_MEM_FIFO_EMPTY;
514
515 while (i--) {
516 unsigned int val = peek32(DE_STATE2);
517
518 if ((val & mask) ==
519 (DE_STATE2_DE_FIFO_EMPTY | DE_STATE2_DE_MEM_FIFO_EMPTY))
520 return 0;
521 }
522 /* timeout error */
523 return -1;
524 }
525
hw_sm750_deWait(void)526 int hw_sm750_deWait(void)
527 {
528 int i = 0x10000000;
529 unsigned int mask = SYSTEM_CTRL_DE_STATUS_BUSY |
530 SYSTEM_CTRL_DE_FIFO_EMPTY |
531 SYSTEM_CTRL_DE_MEM_FIFO_EMPTY;
532
533 while (i--) {
534 unsigned int val = peek32(SYSTEM_CTRL);
535
536 if ((val & mask) ==
537 (SYSTEM_CTRL_DE_FIFO_EMPTY | SYSTEM_CTRL_DE_MEM_FIFO_EMPTY))
538 return 0;
539 }
540 /* timeout error */
541 return -1;
542 }
543
hw_sm750_pan_display(struct lynxfb_crtc * crtc,const struct fb_var_screeninfo * var,const struct fb_info * info)544 int hw_sm750_pan_display(struct lynxfb_crtc *crtc,
545 const struct fb_var_screeninfo *var,
546 const struct fb_info *info)
547 {
548 u32 total;
549 /* check params */
550 if ((var->xoffset + var->xres > var->xres_virtual) ||
551 (var->yoffset + var->yres > var->yres_virtual)) {
552 return -EINVAL;
553 }
554
555 total = var->yoffset * info->fix.line_length +
556 ((var->xoffset * var->bits_per_pixel) >> 3);
557 total += crtc->oScreen;
558 if (crtc->channel == sm750_primary) {
559 poke32(PANEL_FB_ADDRESS,
560 peek32(PANEL_FB_ADDRESS) |
561 (total & PANEL_FB_ADDRESS_ADDRESS_MASK));
562 } else {
563 poke32(CRT_FB_ADDRESS,
564 peek32(CRT_FB_ADDRESS) |
565 (total & CRT_FB_ADDRESS_ADDRESS_MASK));
566 }
567 return 0;
568 }
569
