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1/*
2 * OMAP2plus display device setup / initialization.
3 *
4 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
5 * Senthilvadivu Guruswamy
6 * Sumit Semwal
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
13 * kind, whether express or implied; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18#include <linux/string.h>
19#include <linux/kernel.h>
20#include <linux/init.h>
21#include <linux/platform_device.h>
22#include <linux/io.h>
23#include <linux/clk.h>
24#include <linux/err.h>
25#include <linux/delay.h>
26
27#include <video/omapdss.h>
28#include <plat/omap_hwmod.h>
29#include <plat/omap_device.h>
30#include <plat/omap-pm.h>
31#include "common.h"
32
33#include "iomap.h"
34#include "mux.h"
35#include "control.h"
36#include "display.h"
37
38#define DISPC_CONTROL 0x0040
39#define DISPC_CONTROL2 0x0238
40#define DISPC_IRQSTATUS 0x0018
41
42#define DSS_SYSCONFIG 0x10
43#define DSS_SYSSTATUS 0x14
44#define DSS_CONTROL 0x40
45#define DSS_SDI_CONTROL 0x44
46#define DSS_PLL_CONTROL 0x48
47
48#define LCD_EN_MASK (0x1 << 0)
49#define DIGIT_EN_MASK (0x1 << 1)
50
51#define FRAMEDONE_IRQ_SHIFT 0
52#define EVSYNC_EVEN_IRQ_SHIFT 2
53#define EVSYNC_ODD_IRQ_SHIFT 3
54#define FRAMEDONE2_IRQ_SHIFT 22
55#define FRAMEDONETV_IRQ_SHIFT 24
56
57/*
58 * FRAMEDONE_IRQ_TIMEOUT: how long (in milliseconds) to wait during DISPC
59 * reset before deciding that something has gone wrong
60 */
61#define FRAMEDONE_IRQ_TIMEOUT 100
62
63static struct platform_device omap_display_device = {
64 .name = "omapdss",
65 .id = -1,
66 .dev = {
67 .platform_data = NULL,
68 },
69};
70
71struct omap_dss_hwmod_data {
72 const char *oh_name;
73 const char *dev_name;
74 const int id;
75};
76
77static const struct omap_dss_hwmod_data omap2_dss_hwmod_data[] __initdata = {
78 { "dss_core", "omapdss_dss", -1 },
79 { "dss_dispc", "omapdss_dispc", -1 },
80 { "dss_rfbi", "omapdss_rfbi", -1 },
81 { "dss_venc", "omapdss_venc", -1 },
82};
83
84static const struct omap_dss_hwmod_data omap3_dss_hwmod_data[] __initdata = {
85 { "dss_core", "omapdss_dss", -1 },
86 { "dss_dispc", "omapdss_dispc", -1 },
87 { "dss_rfbi", "omapdss_rfbi", -1 },
88 { "dss_venc", "omapdss_venc", -1 },
89 { "dss_dsi1", "omapdss_dsi", 0 },
90};
91
92static const struct omap_dss_hwmod_data omap4_dss_hwmod_data[] __initdata = {
93 { "dss_core", "omapdss_dss", -1 },
94 { "dss_dispc", "omapdss_dispc", -1 },
95 { "dss_rfbi", "omapdss_rfbi", -1 },
96 { "dss_venc", "omapdss_venc", -1 },
97 { "dss_dsi1", "omapdss_dsi", 0 },
98 { "dss_dsi2", "omapdss_dsi", 1 },
99 { "dss_hdmi", "omapdss_hdmi", -1 },
100};
101
102static void __init omap4_hdmi_mux_pads(enum omap_hdmi_flags flags)
103{
104 u32 reg;
105 u16 control_i2c_1;
106
107 omap_mux_init_signal("hdmi_cec",
108 OMAP_PIN_INPUT_PULLUP);
109 omap_mux_init_signal("hdmi_ddc_scl",
110 OMAP_PIN_INPUT_PULLUP);
111 omap_mux_init_signal("hdmi_ddc_sda",
112 OMAP_PIN_INPUT_PULLUP);
113
114 /*
115 * CONTROL_I2C_1: HDMI_DDC_SDA_PULLUPRESX (bit 28) and
116 * HDMI_DDC_SCL_PULLUPRESX (bit 24) are set to disable
117 * internal pull up resistor.
118 */
119 if (flags & OMAP_HDMI_SDA_SCL_EXTERNAL_PULLUP) {
120 control_i2c_1 = OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_I2C_1;
121 reg = omap4_ctrl_pad_readl(control_i2c_1);
122 reg |= (OMAP4_HDMI_DDC_SDA_PULLUPRESX_MASK |
123 OMAP4_HDMI_DDC_SCL_PULLUPRESX_MASK);
124 omap4_ctrl_pad_writel(reg, control_i2c_1);
125 }
126}
127
128static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
129{
130 u32 enable_mask, enable_shift;
131 u32 pipd_mask, pipd_shift;
132 u32 reg;
133
134 if (dsi_id == 0) {
135 enable_mask = OMAP4_DSI1_LANEENABLE_MASK;
136 enable_shift = OMAP4_DSI1_LANEENABLE_SHIFT;
137 pipd_mask = OMAP4_DSI1_PIPD_MASK;
138 pipd_shift = OMAP4_DSI1_PIPD_SHIFT;
139 } else if (dsi_id == 1) {
140 enable_mask = OMAP4_DSI2_LANEENABLE_MASK;
141 enable_shift = OMAP4_DSI2_LANEENABLE_SHIFT;
142 pipd_mask = OMAP4_DSI2_PIPD_MASK;
143 pipd_shift = OMAP4_DSI2_PIPD_SHIFT;
144 } else {
145 return -ENODEV;
146 }
147
148 reg = omap4_ctrl_pad_readl(OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY);
149
150 reg &= ~enable_mask;
151 reg &= ~pipd_mask;
152
153 reg |= (lanes << enable_shift) & enable_mask;
154 reg |= (lanes << pipd_shift) & pipd_mask;
155
156 omap4_ctrl_pad_writel(reg, OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY);
157
158 return 0;
159}
160
161int __init omap_hdmi_init(enum omap_hdmi_flags flags)
162{
163 if (cpu_is_omap44xx())
164 omap4_hdmi_mux_pads(flags);
165
166 return 0;
167}
168
169static int omap_dsi_enable_pads(int dsi_id, unsigned lane_mask)
170{
171 if (cpu_is_omap44xx())
172 return omap4_dsi_mux_pads(dsi_id, lane_mask);
173
174 return 0;
175}
176
177static void omap_dsi_disable_pads(int dsi_id, unsigned lane_mask)
178{
179 if (cpu_is_omap44xx())
180 omap4_dsi_mux_pads(dsi_id, 0);
181}
182
183static int omap_dss_set_min_bus_tput(struct device *dev, unsigned long tput)
184{
185 return omap_pm_set_min_bus_tput(dev, OCP_INITIATOR_AGENT, tput);
186}
187
188static struct platform_device *create_dss_pdev(const char *pdev_name,
189 int pdev_id, const char *oh_name, void *pdata, int pdata_len,
190 struct platform_device *parent)
191{
192 struct platform_device *pdev;
193 struct omap_device *od;
194 struct omap_hwmod *ohs[1];
195 struct omap_hwmod *oh;
196 int r;
197
198 oh = omap_hwmod_lookup(oh_name);
199 if (!oh) {
200 pr_err("Could not look up %s\n", oh_name);
201 r = -ENODEV;
202 goto err;
203 }
204
205 pdev = platform_device_alloc(pdev_name, pdev_id);
206 if (!pdev) {
207 pr_err("Could not create pdev for %s\n", pdev_name);
208 r = -ENOMEM;
209 goto err;
210 }
211
212 if (parent != NULL)
213 pdev->dev.parent = &parent->dev;
214
215 if (pdev->id != -1)
216 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
217 else
218 dev_set_name(&pdev->dev, "%s", pdev->name);
219
220 ohs[0] = oh;
221 od = omap_device_alloc(pdev, ohs, 1, NULL, 0);
222 if (!od) {
223 pr_err("Could not alloc omap_device for %s\n", pdev_name);
224 r = -ENOMEM;
225 goto err;
226 }
227
228 r = platform_device_add_data(pdev, pdata, pdata_len);
229 if (r) {
230 pr_err("Could not set pdata for %s\n", pdev_name);
231 goto err;
232 }
233
234 r = omap_device_register(pdev);
235 if (r) {
236 pr_err("Could not register omap_device for %s\n", pdev_name);
237 goto err;
238 }
239
240 return pdev;
241
242err:
243 return ERR_PTR(r);
244}
245
246static struct platform_device *create_simple_dss_pdev(const char *pdev_name,
247 int pdev_id, void *pdata, int pdata_len,
248 struct platform_device *parent)
249{
250 struct platform_device *pdev;
251 int r;
252
253 pdev = platform_device_alloc(pdev_name, pdev_id);
254 if (!pdev) {
255 pr_err("Could not create pdev for %s\n", pdev_name);
256 r = -ENOMEM;
257 goto err;
258 }
259
260 if (parent != NULL)
261 pdev->dev.parent = &parent->dev;
262
263 if (pdev->id != -1)
264 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
265 else
266 dev_set_name(&pdev->dev, "%s", pdev->name);
267
268 r = platform_device_add_data(pdev, pdata, pdata_len);
269 if (r) {
270 pr_err("Could not set pdata for %s\n", pdev_name);
271 goto err;
272 }
273
274 r = platform_device_add(pdev);
275 if (r) {
276 pr_err("Could not register platform_device for %s\n", pdev_name);
277 goto err;
278 }
279
280 return pdev;
281
282err:
283 return ERR_PTR(r);
284}
285
286int __init omap_display_init(struct omap_dss_board_info *board_data)
287{
288 int r = 0;
289 struct platform_device *pdev;
290 int i, oh_count;
291 const struct omap_dss_hwmod_data *curr_dss_hwmod;
292 struct platform_device *dss_pdev;
293
294 /* create omapdss device */
295
296 board_data->dsi_enable_pads = omap_dsi_enable_pads;
297 board_data->dsi_disable_pads = omap_dsi_disable_pads;
298 board_data->get_context_loss_count = omap_pm_get_dev_context_loss_count;
299 board_data->set_min_bus_tput = omap_dss_set_min_bus_tput;
300
301 omap_display_device.dev.platform_data = board_data;
302
303 r = platform_device_register(&omap_display_device);
304 if (r < 0) {
305 pr_err("Unable to register omapdss device\n");
306 return r;
307 }
308
309 /* create devices for dss hwmods */
310
311 if (cpu_is_omap24xx()) {
312 curr_dss_hwmod = omap2_dss_hwmod_data;
313 oh_count = ARRAY_SIZE(omap2_dss_hwmod_data);
314 } else if (cpu_is_omap34xx()) {
315 curr_dss_hwmod = omap3_dss_hwmod_data;
316 oh_count = ARRAY_SIZE(omap3_dss_hwmod_data);
317 } else {
318 curr_dss_hwmod = omap4_dss_hwmod_data;
319 oh_count = ARRAY_SIZE(omap4_dss_hwmod_data);
320 }
321
322 /*
323 * First create the pdev for dss_core, which is used as a parent device
324 * by the other dss pdevs. Note: dss_core has to be the first item in
325 * the hwmod list.
326 */
327 dss_pdev = create_dss_pdev(curr_dss_hwmod[0].dev_name,
328 curr_dss_hwmod[0].id,
329 curr_dss_hwmod[0].oh_name,
330 board_data, sizeof(*board_data),
331 NULL);
332
333 if (IS_ERR(dss_pdev)) {
334 pr_err("Could not build omap_device for %s\n",
335 curr_dss_hwmod[0].oh_name);
336
337 return PTR_ERR(dss_pdev);
338 }
339
340 for (i = 1; i < oh_count; i++) {
341 pdev = create_dss_pdev(curr_dss_hwmod[i].dev_name,
342 curr_dss_hwmod[i].id,
343 curr_dss_hwmod[i].oh_name,
344 board_data, sizeof(*board_data),
345 dss_pdev);
346
347 if (IS_ERR(pdev)) {
348 pr_err("Could not build omap_device for %s\n",
349 curr_dss_hwmod[i].oh_name);
350
351 return PTR_ERR(pdev);
352 }
353 }
354
355 /* Create devices for DPI and SDI */
356
357 pdev = create_simple_dss_pdev("omapdss_dpi", -1,
358 board_data, sizeof(*board_data), dss_pdev);
359 if (IS_ERR(pdev)) {
360 pr_err("Could not build platform_device for omapdss_dpi\n");
361 return PTR_ERR(pdev);
362 }
363
364 if (cpu_is_omap34xx()) {
365 pdev = create_simple_dss_pdev("omapdss_sdi", -1,
366 board_data, sizeof(*board_data), dss_pdev);
367 if (IS_ERR(pdev)) {
368 pr_err("Could not build platform_device for omapdss_sdi\n");
369 return PTR_ERR(pdev);
370 }
371 }
372
373 return 0;
374}
375
376static void dispc_disable_outputs(void)
377{
378 u32 v, irq_mask = 0;
379 bool lcd_en, digit_en, lcd2_en = false;
380 int i;
381 struct omap_dss_dispc_dev_attr *da;
382 struct omap_hwmod *oh;
383
384 oh = omap_hwmod_lookup("dss_dispc");
385 if (!oh) {
386 WARN(1, "display: could not disable outputs during reset - could not find dss_dispc hwmod\n");
387 return;
388 }
389
390 if (!oh->dev_attr) {
391 pr_err("display: could not disable outputs during reset due to missing dev_attr\n");
392 return;
393 }
394
395 da = (struct omap_dss_dispc_dev_attr *)oh->dev_attr;
396
397 /* store value of LCDENABLE and DIGITENABLE bits */
398 v = omap_hwmod_read(oh, DISPC_CONTROL);
399 lcd_en = v & LCD_EN_MASK;
400 digit_en = v & DIGIT_EN_MASK;
401
402 /* store value of LCDENABLE for LCD2 */
403 if (da->manager_count > 2) {
404 v = omap_hwmod_read(oh, DISPC_CONTROL2);
405 lcd2_en = v & LCD_EN_MASK;
406 }
407
408 if (!(lcd_en | digit_en | lcd2_en))
409 return; /* no managers currently enabled */
410
411 /*
412 * If any manager was enabled, we need to disable it before
413 * DSS clocks are disabled or DISPC module is reset
414 */
415 if (lcd_en)
416 irq_mask |= 1 << FRAMEDONE_IRQ_SHIFT;
417
418 if (digit_en) {
419 if (da->has_framedonetv_irq) {
420 irq_mask |= 1 << FRAMEDONETV_IRQ_SHIFT;
421 } else {
422 irq_mask |= 1 << EVSYNC_EVEN_IRQ_SHIFT |
423 1 << EVSYNC_ODD_IRQ_SHIFT;
424 }
425 }
426
427 if (lcd2_en)
428 irq_mask |= 1 << FRAMEDONE2_IRQ_SHIFT;
429
430 /*
431 * clear any previous FRAMEDONE, FRAMEDONETV,
432 * EVSYNC_EVEN/ODD or FRAMEDONE2 interrupts
433 */
434 omap_hwmod_write(irq_mask, oh, DISPC_IRQSTATUS);
435
436 /* disable LCD and TV managers */
437 v = omap_hwmod_read(oh, DISPC_CONTROL);
438 v &= ~(LCD_EN_MASK | DIGIT_EN_MASK);
439 omap_hwmod_write(v, oh, DISPC_CONTROL);
440
441 /* disable LCD2 manager */
442 if (da->manager_count > 2) {
443 v = omap_hwmod_read(oh, DISPC_CONTROL2);
444 v &= ~LCD_EN_MASK;
445 omap_hwmod_write(v, oh, DISPC_CONTROL2);
446 }
447
448 i = 0;
449 while ((omap_hwmod_read(oh, DISPC_IRQSTATUS) & irq_mask) !=
450 irq_mask) {
451 i++;
452 if (i > FRAMEDONE_IRQ_TIMEOUT) {
453 pr_err("didn't get FRAMEDONE1/2 or TV interrupt\n");
454 break;
455 }
456 mdelay(1);
457 }
458}
459
460#define MAX_MODULE_SOFTRESET_WAIT 10000
461int omap_dss_reset(struct omap_hwmod *oh)
462{
463 struct omap_hwmod_opt_clk *oc;
464 int c = 0;
465 int i, r;
466
467 if (!(oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS)) {
468 pr_err("dss_core: hwmod data doesn't contain reset data\n");
469 return -EINVAL;
470 }
471
472 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
473 if (oc->_clk)
474 clk_enable(oc->_clk);
475
476 dispc_disable_outputs();
477
478 /* clear SDI registers */
479 if (cpu_is_omap3430()) {
480 omap_hwmod_write(0x0, oh, DSS_SDI_CONTROL);
481 omap_hwmod_write(0x0, oh, DSS_PLL_CONTROL);
482 }
483
484 /*
485 * clear DSS_CONTROL register to switch DSS clock sources to
486 * PRCM clock, if any
487 */
488 omap_hwmod_write(0x0, oh, DSS_CONTROL);
489
490 omap_test_timeout((omap_hwmod_read(oh, oh->class->sysc->syss_offs)
491 & SYSS_RESETDONE_MASK),
492 MAX_MODULE_SOFTRESET_WAIT, c);
493
494 if (c == MAX_MODULE_SOFTRESET_WAIT)
495 pr_warning("dss_core: waiting for reset to finish failed\n");
496 else
497 pr_debug("dss_core: softreset done\n");
498
499 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
500 if (oc->_clk)
501 clk_disable(oc->_clk);
502
503 r = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0;
504
505 return r;
506}
1/*
2 * OMAP2plus display device setup / initialization.
3 *
4 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
5 * Senthilvadivu Guruswamy
6 * Sumit Semwal
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
13 * kind, whether express or implied; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/platform_device.h>
21#include <linux/io.h>
22#include <linux/clk.h>
23#include <linux/err.h>
24
25#include <video/omapdss.h>
26#include <plat/omap_hwmod.h>
27#include <plat/omap_device.h>
28#include <plat/omap-pm.h>
29
30static struct platform_device omap_display_device = {
31 .name = "omapdss",
32 .id = -1,
33 .dev = {
34 .platform_data = NULL,
35 },
36};
37
38static struct omap_device_pm_latency omap_dss_latency[] = {
39 [0] = {
40 .deactivate_func = omap_device_idle_hwmods,
41 .activate_func = omap_device_enable_hwmods,
42 .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
43 },
44};
45
46struct omap_dss_hwmod_data {
47 const char *oh_name;
48 const char *dev_name;
49 const int id;
50};
51
52static const struct omap_dss_hwmod_data omap2_dss_hwmod_data[] __initdata = {
53 { "dss_core", "omapdss_dss", -1 },
54 { "dss_dispc", "omapdss_dispc", -1 },
55 { "dss_rfbi", "omapdss_rfbi", -1 },
56 { "dss_venc", "omapdss_venc", -1 },
57};
58
59static const struct omap_dss_hwmod_data omap3_dss_hwmod_data[] __initdata = {
60 { "dss_core", "omapdss_dss", -1 },
61 { "dss_dispc", "omapdss_dispc", -1 },
62 { "dss_rfbi", "omapdss_rfbi", -1 },
63 { "dss_venc", "omapdss_venc", -1 },
64 { "dss_dsi1", "omapdss_dsi1", -1 },
65};
66
67static const struct omap_dss_hwmod_data omap4_dss_hwmod_data[] __initdata = {
68 { "dss_core", "omapdss_dss", -1 },
69 { "dss_dispc", "omapdss_dispc", -1 },
70 { "dss_rfbi", "omapdss_rfbi", -1 },
71 { "dss_venc", "omapdss_venc", -1 },
72 { "dss_dsi1", "omapdss_dsi1", -1 },
73 { "dss_dsi2", "omapdss_dsi2", -1 },
74 { "dss_hdmi", "omapdss_hdmi", -1 },
75};
76
77int __init omap_display_init(struct omap_dss_board_info *board_data)
78{
79 int r = 0;
80 struct omap_hwmod *oh;
81 struct omap_device *od;
82 int i, oh_count;
83 struct omap_display_platform_data pdata;
84 const struct omap_dss_hwmod_data *curr_dss_hwmod;
85
86 memset(&pdata, 0, sizeof(pdata));
87
88 if (cpu_is_omap24xx()) {
89 curr_dss_hwmod = omap2_dss_hwmod_data;
90 oh_count = ARRAY_SIZE(omap2_dss_hwmod_data);
91 } else if (cpu_is_omap34xx()) {
92 curr_dss_hwmod = omap3_dss_hwmod_data;
93 oh_count = ARRAY_SIZE(omap3_dss_hwmod_data);
94 } else {
95 curr_dss_hwmod = omap4_dss_hwmod_data;
96 oh_count = ARRAY_SIZE(omap4_dss_hwmod_data);
97 }
98
99 pdata.board_data = board_data;
100 pdata.board_data->get_context_loss_count =
101 omap_pm_get_dev_context_loss_count;
102
103 for (i = 0; i < oh_count; i++) {
104 oh = omap_hwmod_lookup(curr_dss_hwmod[i].oh_name);
105 if (!oh) {
106 pr_err("Could not look up %s\n",
107 curr_dss_hwmod[i].oh_name);
108 return -ENODEV;
109 }
110
111 od = omap_device_build(curr_dss_hwmod[i].dev_name,
112 curr_dss_hwmod[i].id, oh, &pdata,
113 sizeof(struct omap_display_platform_data),
114 omap_dss_latency,
115 ARRAY_SIZE(omap_dss_latency), 0);
116
117 if (WARN((IS_ERR(od)), "Could not build omap_device for %s\n",
118 curr_dss_hwmod[i].oh_name))
119 return -ENODEV;
120 }
121 omap_display_device.dev.platform_data = board_data;
122
123 r = platform_device_register(&omap_display_device);
124 if (r < 0)
125 printk(KERN_ERR "Unable to register OMAP-Display device\n");
126
127 return r;
128}