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1/*
2 * Copyright (c) 2006 Intel Corporation
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
16 *
17 * Authors:
18 * Eric Anholt <eric@anholt.net>
19 *
20 */
21#include <drm/drmP.h>
22#include <drm/drm.h>
23#include "gma_drm.h"
24#include "psb_drv.h"
25#include "psb_intel_drv.h"
26#include "psb_intel_reg.h"
27#include "intel_bios.h"
28
29#define SLAVE_ADDR1 0x70
30#define SLAVE_ADDR2 0x72
31
32static void *find_section(struct bdb_header *bdb, int section_id)
33{
34 u8 *base = (u8 *)bdb;
35 int index = 0;
36 u16 total, current_size;
37 u8 current_id;
38
39 /* skip to first section */
40 index += bdb->header_size;
41 total = bdb->bdb_size;
42
43 /* walk the sections looking for section_id */
44 while (index < total) {
45 current_id = *(base + index);
46 index++;
47 current_size = *((u16 *)(base + index));
48 index += 2;
49 if (current_id == section_id)
50 return base + index;
51 index += current_size;
52 }
53
54 return NULL;
55}
56
57static u16
58get_blocksize(void *p)
59{
60 u16 *block_ptr, block_size;
61
62 block_ptr = (u16 *)((char *)p - 2);
63 block_size = *block_ptr;
64 return block_size;
65}
66
67static void fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
68 struct lvds_dvo_timing *dvo_timing)
69{
70 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
71 dvo_timing->hactive_lo;
72 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
73 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
74 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
75 dvo_timing->hsync_pulse_width;
76 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
77 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
78
79 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
80 dvo_timing->vactive_lo;
81 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
82 dvo_timing->vsync_off;
83 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
84 dvo_timing->vsync_pulse_width;
85 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
86 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
87 panel_fixed_mode->clock = dvo_timing->clock * 10;
88 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
89
90 if (dvo_timing->hsync_positive)
91 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
92 else
93 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
94
95 if (dvo_timing->vsync_positive)
96 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
97 else
98 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
99
100 /* Some VBTs have bogus h/vtotal values */
101 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
102 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
103 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
104 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
105
106 drm_mode_set_name(panel_fixed_mode);
107}
108
109static void parse_backlight_data(struct drm_psb_private *dev_priv,
110 struct bdb_header *bdb)
111{
112 struct bdb_lvds_backlight *vbt_lvds_bl = NULL;
113 struct bdb_lvds_backlight *lvds_bl;
114 u8 p_type = 0;
115 void *bl_start = NULL;
116 struct bdb_lvds_options *lvds_opts
117 = find_section(bdb, BDB_LVDS_OPTIONS);
118
119 dev_priv->lvds_bl = NULL;
120
121 if (lvds_opts)
122 p_type = lvds_opts->panel_type;
123 else
124 return;
125
126 bl_start = find_section(bdb, BDB_LVDS_BACKLIGHT);
127 vbt_lvds_bl = (struct bdb_lvds_backlight *)(bl_start + 1) + p_type;
128
129 lvds_bl = kzalloc(sizeof(*vbt_lvds_bl), GFP_KERNEL);
130 if (!lvds_bl) {
131 dev_err(dev_priv->dev->dev, "out of memory for backlight data\n");
132 return;
133 }
134 memcpy(lvds_bl, vbt_lvds_bl, sizeof(*vbt_lvds_bl));
135 dev_priv->lvds_bl = lvds_bl;
136}
137
138/* Try to find integrated panel data */
139static void parse_lfp_panel_data(struct drm_psb_private *dev_priv,
140 struct bdb_header *bdb)
141{
142 struct bdb_lvds_options *lvds_options;
143 struct bdb_lvds_lfp_data *lvds_lfp_data;
144 struct bdb_lvds_lfp_data_entry *entry;
145 struct lvds_dvo_timing *dvo_timing;
146 struct drm_display_mode *panel_fixed_mode;
147
148 /* Defaults if we can't find VBT info */
149 dev_priv->lvds_dither = 0;
150 dev_priv->lvds_vbt = 0;
151
152 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
153 if (!lvds_options)
154 return;
155
156 dev_priv->lvds_dither = lvds_options->pixel_dither;
157 if (lvds_options->panel_type == 0xff)
158 return;
159
160 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
161 if (!lvds_lfp_data)
162 return;
163
164
165 entry = &lvds_lfp_data->data[lvds_options->panel_type];
166 dvo_timing = &entry->dvo_timing;
167
168 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode),
169 GFP_KERNEL);
170 if (panel_fixed_mode == NULL) {
171 dev_err(dev_priv->dev->dev, "out of memory for fixed panel mode\n");
172 return;
173 }
174
175 dev_priv->lvds_vbt = 1;
176 fill_detail_timing_data(panel_fixed_mode, dvo_timing);
177
178 if (panel_fixed_mode->htotal > 0 && panel_fixed_mode->vtotal > 0) {
179 dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode;
180 drm_mode_debug_printmodeline(panel_fixed_mode);
181 } else {
182 dev_dbg(dev_priv->dev->dev, "ignoring invalid LVDS VBT\n");
183 dev_priv->lvds_vbt = 0;
184 kfree(panel_fixed_mode);
185 }
186 return;
187}
188
189/* Try to find sdvo panel data */
190static void parse_sdvo_panel_data(struct drm_psb_private *dev_priv,
191 struct bdb_header *bdb)
192{
193 struct bdb_sdvo_lvds_options *sdvo_lvds_options;
194 struct lvds_dvo_timing *dvo_timing;
195 struct drm_display_mode *panel_fixed_mode;
196
197 dev_priv->sdvo_lvds_vbt_mode = NULL;
198
199 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
200 if (!sdvo_lvds_options)
201 return;
202
203 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
204 if (!dvo_timing)
205 return;
206
207 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
208
209 if (!panel_fixed_mode)
210 return;
211
212 fill_detail_timing_data(panel_fixed_mode,
213 dvo_timing + sdvo_lvds_options->panel_type);
214
215 dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode;
216
217 return;
218}
219
220static void parse_general_features(struct drm_psb_private *dev_priv,
221 struct bdb_header *bdb)
222{
223 struct bdb_general_features *general;
224
225 /* Set sensible defaults in case we can't find the general block */
226 dev_priv->int_tv_support = 1;
227 dev_priv->int_crt_support = 1;
228
229 general = find_section(bdb, BDB_GENERAL_FEATURES);
230 if (general) {
231 dev_priv->int_tv_support = general->int_tv_support;
232 dev_priv->int_crt_support = general->int_crt_support;
233 dev_priv->lvds_use_ssc = general->enable_ssc;
234
235 if (dev_priv->lvds_use_ssc) {
236 dev_priv->lvds_ssc_freq
237 = general->ssc_freq ? 100 : 96;
238 }
239 }
240}
241
242static void
243parse_sdvo_device_mapping(struct drm_psb_private *dev_priv,
244 struct bdb_header *bdb)
245{
246 struct sdvo_device_mapping *p_mapping;
247 struct bdb_general_definitions *p_defs;
248 struct child_device_config *p_child;
249 int i, child_device_num, count;
250 u16 block_size;
251
252 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
253 if (!p_defs) {
254 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
255 return;
256 }
257 /* judge whether the size of child device meets the requirements.
258 * If the child device size obtained from general definition block
259 * is different with sizeof(struct child_device_config), skip the
260 * parsing of sdvo device info
261 */
262 if (p_defs->child_dev_size != sizeof(*p_child)) {
263 /* different child dev size . Ignore it */
264 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
265 return;
266 }
267 /* get the block size of general definitions */
268 block_size = get_blocksize(p_defs);
269 /* get the number of child device */
270 child_device_num = (block_size - sizeof(*p_defs)) /
271 sizeof(*p_child);
272 count = 0;
273 for (i = 0; i < child_device_num; i++) {
274 p_child = &(p_defs->devices[i]);
275 if (!p_child->device_type) {
276 /* skip the device block if device type is invalid */
277 continue;
278 }
279 if (p_child->slave_addr != SLAVE_ADDR1 &&
280 p_child->slave_addr != SLAVE_ADDR2) {
281 /*
282 * If the slave address is neither 0x70 nor 0x72,
283 * it is not a SDVO device. Skip it.
284 */
285 continue;
286 }
287 if (p_child->dvo_port != DEVICE_PORT_DVOB &&
288 p_child->dvo_port != DEVICE_PORT_DVOC) {
289 /* skip the incorrect SDVO port */
290 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
291 continue;
292 }
293 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
294 " %s port\n",
295 p_child->slave_addr,
296 (p_child->dvo_port == DEVICE_PORT_DVOB) ?
297 "SDVOB" : "SDVOC");
298 p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
299 if (!p_mapping->initialized) {
300 p_mapping->dvo_port = p_child->dvo_port;
301 p_mapping->slave_addr = p_child->slave_addr;
302 p_mapping->dvo_wiring = p_child->dvo_wiring;
303 p_mapping->ddc_pin = p_child->ddc_pin;
304 p_mapping->i2c_pin = p_child->i2c_pin;
305 p_mapping->initialized = 1;
306 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
307 p_mapping->dvo_port,
308 p_mapping->slave_addr,
309 p_mapping->dvo_wiring,
310 p_mapping->ddc_pin,
311 p_mapping->i2c_pin);
312 } else {
313 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
314 "two SDVO device.\n");
315 }
316 if (p_child->slave2_addr) {
317 /* Maybe this is a SDVO device with multiple inputs */
318 /* And the mapping info is not added */
319 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
320 " is a SDVO device with multiple inputs.\n");
321 }
322 count++;
323 }
324
325 if (!count) {
326 /* No SDVO device info is found */
327 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
328 }
329 return;
330}
331
332
333static void
334parse_driver_features(struct drm_psb_private *dev_priv,
335 struct bdb_header *bdb)
336{
337 struct bdb_driver_features *driver;
338
339 driver = find_section(bdb, BDB_DRIVER_FEATURES);
340 if (!driver)
341 return;
342
343 /* This bit means to use 96Mhz for DPLL_A or not */
344 if (driver->primary_lfp_id)
345 dev_priv->dplla_96mhz = true;
346 else
347 dev_priv->dplla_96mhz = false;
348}
349
350static void
351parse_device_mapping(struct drm_psb_private *dev_priv,
352 struct bdb_header *bdb)
353{
354 struct bdb_general_definitions *p_defs;
355 struct child_device_config *p_child, *child_dev_ptr;
356 int i, child_device_num, count;
357 u16 block_size;
358
359 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
360 if (!p_defs) {
361 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
362 return;
363 }
364 /* judge whether the size of child device meets the requirements.
365 * If the child device size obtained from general definition block
366 * is different with sizeof(struct child_device_config), skip the
367 * parsing of sdvo device info
368 */
369 if (p_defs->child_dev_size != sizeof(*p_child)) {
370 /* different child dev size . Ignore it */
371 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
372 return;
373 }
374 /* get the block size of general definitions */
375 block_size = get_blocksize(p_defs);
376 /* get the number of child device */
377 child_device_num = (block_size - sizeof(*p_defs)) /
378 sizeof(*p_child);
379 count = 0;
380 /* get the number of child devices that are present */
381 for (i = 0; i < child_device_num; i++) {
382 p_child = &(p_defs->devices[i]);
383 if (!p_child->device_type) {
384 /* skip the device block if device type is invalid */
385 continue;
386 }
387 count++;
388 }
389 if (!count) {
390 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
391 return;
392 }
393 dev_priv->child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
394 if (!dev_priv->child_dev) {
395 DRM_DEBUG_KMS("No memory space for child devices\n");
396 return;
397 }
398
399 dev_priv->child_dev_num = count;
400 count = 0;
401 for (i = 0; i < child_device_num; i++) {
402 p_child = &(p_defs->devices[i]);
403 if (!p_child->device_type) {
404 /* skip the device block if device type is invalid */
405 continue;
406 }
407 child_dev_ptr = dev_priv->child_dev + count;
408 count++;
409 memcpy((void *)child_dev_ptr, (void *)p_child,
410 sizeof(*p_child));
411 }
412 return;
413}
414
415
416/**
417 * psb_intel_init_bios - initialize VBIOS settings & find VBT
418 * @dev: DRM device
419 *
420 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
421 * to appropriate values.
422 *
423 * VBT existence is a sanity check that is relied on by other i830_bios.c code.
424 * Note that it would be better to use a BIOS call to get the VBT, as BIOSes may
425 * feed an updated VBT back through that, compared to what we'll fetch using
426 * this method of groping around in the BIOS data.
427 *
428 * Returns 0 on success, nonzero on failure.
429 */
430bool psb_intel_init_bios(struct drm_device *dev)
431{
432 struct drm_psb_private *dev_priv = dev->dev_private;
433 struct pci_dev *pdev = dev->pdev;
434 struct vbt_header *vbt = NULL;
435 struct bdb_header *bdb = NULL;
436 u8 __iomem *bios = NULL;
437 size_t size;
438 int i;
439
440 /* XXX Should this validation be moved to intel_opregion.c? */
441 if (dev_priv->opregion.vbt) {
442 struct vbt_header *vbt = dev_priv->opregion.vbt;
443 if (memcmp(vbt->signature, "$VBT", 4) == 0) {
444 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n",
445 vbt->signature);
446 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset);
447 } else
448 dev_priv->opregion.vbt = NULL;
449 }
450
451 if (bdb == NULL) {
452 bios = pci_map_rom(pdev, &size);
453 if (!bios)
454 return -1;
455
456 /* Scour memory looking for the VBT signature */
457 for (i = 0; i + 4 < size; i++) {
458 if (!memcmp(bios + i, "$VBT", 4)) {
459 vbt = (struct vbt_header *)(bios + i);
460 break;
461 }
462 }
463
464 if (!vbt) {
465 dev_err(dev->dev, "VBT signature missing\n");
466 pci_unmap_rom(pdev, bios);
467 return -1;
468 }
469 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
470 }
471
472 /* Grab useful general dxefinitions */
473 parse_general_features(dev_priv, bdb);
474 parse_driver_features(dev_priv, bdb);
475 parse_lfp_panel_data(dev_priv, bdb);
476 parse_sdvo_panel_data(dev_priv, bdb);
477 parse_sdvo_device_mapping(dev_priv, bdb);
478 parse_device_mapping(dev_priv, bdb);
479 parse_backlight_data(dev_priv, bdb);
480
481 if (bios)
482 pci_unmap_rom(pdev, bios);
483
484 return 0;
485}
486
487/**
488 * Destroy and free VBT data
489 */
490void psb_intel_destroy_bios(struct drm_device *dev)
491{
492 struct drm_psb_private *dev_priv = dev->dev_private;
493
494 kfree(dev_priv->sdvo_lvds_vbt_mode);
495 kfree(dev_priv->lfp_lvds_vbt_mode);
496 kfree(dev_priv->lvds_bl);
497}