Commit | Line | Data |
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b7ee79ab SS |
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 | ||
d44b28c4 | 18 | #include <linux/string.h> |
b7ee79ab SS |
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> | |
deee6d53 | 25 | #include <linux/delay.h> |
dcdf407b TV |
26 | #include <linux/of.h> |
27 | #include <linux/of_platform.h> | |
6a0e6b38 | 28 | #include <linux/slab.h> |
23d34981 TK |
29 | #include <linux/mfd/syscon.h> |
30 | #include <linux/regmap.h> | |
b7ee79ab | 31 | |
f8e0db97 | 32 | #include <linux/platform_data/omapdss.h> |
2a296c8f | 33 | #include "omap_hwmod.h" |
25c7d49e | 34 | #include "omap_device.h" |
1d5aef49 | 35 | #include "omap-pm.h" |
deee6d53 | 36 | #include "common.h" |
b7ee79ab | 37 | |
e4c060db | 38 | #include "soc.h" |
ee0839c2 | 39 | #include "iomap.h" |
dc35835c | 40 | #include "control.h" |
b923d40d | 41 | #include "display.h" |
b13159af | 42 | #include "prm.h" |
b923d40d AT |
43 | |
44 | #define DISPC_CONTROL 0x0040 | |
45 | #define DISPC_CONTROL2 0x0238 | |
465698ee | 46 | #define DISPC_CONTROL3 0x0848 |
b923d40d AT |
47 | #define DISPC_IRQSTATUS 0x0018 |
48 | ||
b923d40d AT |
49 | #define DSS_CONTROL 0x40 |
50 | #define DSS_SDI_CONTROL 0x44 | |
51 | #define DSS_PLL_CONTROL 0x48 | |
52 | ||
53 | #define LCD_EN_MASK (0x1 << 0) | |
54 | #define DIGIT_EN_MASK (0x1 << 1) | |
55 | ||
56 | #define FRAMEDONE_IRQ_SHIFT 0 | |
57 | #define EVSYNC_EVEN_IRQ_SHIFT 2 | |
58 | #define EVSYNC_ODD_IRQ_SHIFT 3 | |
59 | #define FRAMEDONE2_IRQ_SHIFT 22 | |
465698ee | 60 | #define FRAMEDONE3_IRQ_SHIFT 30 |
b923d40d AT |
61 | #define FRAMEDONETV_IRQ_SHIFT 24 |
62 | ||
63 | /* | |
64 | * FRAMEDONE_IRQ_TIMEOUT: how long (in milliseconds) to wait during DISPC | |
65 | * reset before deciding that something has gone wrong | |
66 | */ | |
67 | #define FRAMEDONE_IRQ_TIMEOUT 100 | |
dc35835c | 68 | |
b7ee79ab SS |
69 | static struct platform_device omap_display_device = { |
70 | .name = "omapdss", | |
71 | .id = -1, | |
72 | .dev = { | |
73 | .platform_data = NULL, | |
74 | }, | |
75 | }; | |
76 | ||
23d34981 TK |
77 | #define OMAP4_DSIPHY_SYSCON_OFFSET 0x78 |
78 | ||
79 | static struct regmap *omap4_dsi_mux_syscon; | |
80 | ||
130f769e TV |
81 | static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes) |
82 | { | |
83 | u32 enable_mask, enable_shift; | |
84 | u32 pipd_mask, pipd_shift; | |
85 | u32 reg; | |
86 | ||
87 | if (dsi_id == 0) { | |
88 | enable_mask = OMAP4_DSI1_LANEENABLE_MASK; | |
89 | enable_shift = OMAP4_DSI1_LANEENABLE_SHIFT; | |
90 | pipd_mask = OMAP4_DSI1_PIPD_MASK; | |
91 | pipd_shift = OMAP4_DSI1_PIPD_SHIFT; | |
92 | } else if (dsi_id == 1) { | |
93 | enable_mask = OMAP4_DSI2_LANEENABLE_MASK; | |
94 | enable_shift = OMAP4_DSI2_LANEENABLE_SHIFT; | |
95 | pipd_mask = OMAP4_DSI2_PIPD_MASK; | |
96 | pipd_shift = OMAP4_DSI2_PIPD_SHIFT; | |
97 | } else { | |
98 | return -ENODEV; | |
99 | } | |
100 | ||
23d34981 | 101 | regmap_read(omap4_dsi_mux_syscon, OMAP4_DSIPHY_SYSCON_OFFSET, ®); |
130f769e TV |
102 | |
103 | reg &= ~enable_mask; | |
104 | reg &= ~pipd_mask; | |
105 | ||
106 | reg |= (lanes << enable_shift) & enable_mask; | |
107 | reg |= (lanes << pipd_shift) & pipd_mask; | |
108 | ||
23d34981 | 109 | regmap_write(omap4_dsi_mux_syscon, OMAP4_DSIPHY_SYSCON_OFFSET, reg); |
130f769e TV |
110 | |
111 | return 0; | |
112 | } | |
113 | ||
e8a30b25 | 114 | static int omap_dsi_enable_pads(int dsi_id, unsigned lane_mask) |
5bc416cb | 115 | { |
130f769e TV |
116 | if (cpu_is_omap44xx()) |
117 | return omap4_dsi_mux_pads(dsi_id, lane_mask); | |
118 | ||
5bc416cb TV |
119 | return 0; |
120 | } | |
121 | ||
e8a30b25 | 122 | static void omap_dsi_disable_pads(int dsi_id, unsigned lane_mask) |
5bc416cb | 123 | { |
130f769e TV |
124 | if (cpu_is_omap44xx()) |
125 | omap4_dsi_mux_pads(dsi_id, 0); | |
5bc416cb TV |
126 | } |
127 | ||
62c1dcfc TV |
128 | static int omap_dss_set_min_bus_tput(struct device *dev, unsigned long tput) |
129 | { | |
130 | return omap_pm_set_min_bus_tput(dev, OCP_INITIATOR_AGENT, tput); | |
131 | } | |
132 | ||
acd18af9 TV |
133 | static enum omapdss_version __init omap_display_get_version(void) |
134 | { | |
135 | if (cpu_is_omap24xx()) | |
136 | return OMAPDSS_VER_OMAP24xx; | |
137 | else if (cpu_is_omap3630()) | |
138 | return OMAPDSS_VER_OMAP3630; | |
139 | else if (cpu_is_omap34xx()) { | |
140 | if (soc_is_am35xx()) { | |
141 | return OMAPDSS_VER_AM35xx; | |
142 | } else { | |
143 | if (omap_rev() < OMAP3430_REV_ES3_0) | |
144 | return OMAPDSS_VER_OMAP34xx_ES1; | |
145 | else | |
146 | return OMAPDSS_VER_OMAP34xx_ES3; | |
147 | } | |
148 | } else if (omap_rev() == OMAP4430_REV_ES1_0) | |
149 | return OMAPDSS_VER_OMAP4430_ES1; | |
150 | else if (omap_rev() == OMAP4430_REV_ES2_0 || | |
151 | omap_rev() == OMAP4430_REV_ES2_1 || | |
152 | omap_rev() == OMAP4430_REV_ES2_2) | |
153 | return OMAPDSS_VER_OMAP4430_ES2; | |
154 | else if (cpu_is_omap44xx()) | |
155 | return OMAPDSS_VER_OMAP4; | |
156 | else if (soc_is_omap54xx()) | |
157 | return OMAPDSS_VER_OMAP5; | |
d6279d4a SP |
158 | else if (soc_is_am43xx()) |
159 | return OMAPDSS_VER_AM43xx; | |
403ee909 TV |
160 | else if (soc_is_dra7xx()) |
161 | return OMAPDSS_VER_DRA7xx; | |
acd18af9 TV |
162 | else |
163 | return OMAPDSS_VER_UNKNOWN; | |
164 | } | |
165 | ||
b923d40d AT |
166 | static void dispc_disable_outputs(void) |
167 | { | |
168 | u32 v, irq_mask = 0; | |
465698ee | 169 | bool lcd_en, digit_en, lcd2_en = false, lcd3_en = false; |
b923d40d AT |
170 | int i; |
171 | struct omap_dss_dispc_dev_attr *da; | |
172 | struct omap_hwmod *oh; | |
173 | ||
174 | oh = omap_hwmod_lookup("dss_dispc"); | |
175 | if (!oh) { | |
176 | WARN(1, "display: could not disable outputs during reset - could not find dss_dispc hwmod\n"); | |
177 | return; | |
178 | } | |
179 | ||
180 | if (!oh->dev_attr) { | |
181 | pr_err("display: could not disable outputs during reset due to missing dev_attr\n"); | |
182 | return; | |
183 | } | |
184 | ||
185 | da = (struct omap_dss_dispc_dev_attr *)oh->dev_attr; | |
186 | ||
187 | /* store value of LCDENABLE and DIGITENABLE bits */ | |
188 | v = omap_hwmod_read(oh, DISPC_CONTROL); | |
189 | lcd_en = v & LCD_EN_MASK; | |
190 | digit_en = v & DIGIT_EN_MASK; | |
191 | ||
192 | /* store value of LCDENABLE for LCD2 */ | |
193 | if (da->manager_count > 2) { | |
194 | v = omap_hwmod_read(oh, DISPC_CONTROL2); | |
195 | lcd2_en = v & LCD_EN_MASK; | |
196 | } | |
197 | ||
465698ee CM |
198 | /* store value of LCDENABLE for LCD3 */ |
199 | if (da->manager_count > 3) { | |
200 | v = omap_hwmod_read(oh, DISPC_CONTROL3); | |
201 | lcd3_en = v & LCD_EN_MASK; | |
202 | } | |
203 | ||
204 | if (!(lcd_en | digit_en | lcd2_en | lcd3_en)) | |
b923d40d AT |
205 | return; /* no managers currently enabled */ |
206 | ||
207 | /* | |
208 | * If any manager was enabled, we need to disable it before | |
209 | * DSS clocks are disabled or DISPC module is reset | |
210 | */ | |
211 | if (lcd_en) | |
212 | irq_mask |= 1 << FRAMEDONE_IRQ_SHIFT; | |
213 | ||
214 | if (digit_en) { | |
215 | if (da->has_framedonetv_irq) { | |
216 | irq_mask |= 1 << FRAMEDONETV_IRQ_SHIFT; | |
217 | } else { | |
218 | irq_mask |= 1 << EVSYNC_EVEN_IRQ_SHIFT | | |
219 | 1 << EVSYNC_ODD_IRQ_SHIFT; | |
220 | } | |
221 | } | |
222 | ||
223 | if (lcd2_en) | |
224 | irq_mask |= 1 << FRAMEDONE2_IRQ_SHIFT; | |
465698ee CM |
225 | if (lcd3_en) |
226 | irq_mask |= 1 << FRAMEDONE3_IRQ_SHIFT; | |
b923d40d AT |
227 | |
228 | /* | |
229 | * clear any previous FRAMEDONE, FRAMEDONETV, | |
465698ee | 230 | * EVSYNC_EVEN/ODD, FRAMEDONE2 or FRAMEDONE3 interrupts |
b923d40d AT |
231 | */ |
232 | omap_hwmod_write(irq_mask, oh, DISPC_IRQSTATUS); | |
233 | ||
234 | /* disable LCD and TV managers */ | |
235 | v = omap_hwmod_read(oh, DISPC_CONTROL); | |
236 | v &= ~(LCD_EN_MASK | DIGIT_EN_MASK); | |
237 | omap_hwmod_write(v, oh, DISPC_CONTROL); | |
238 | ||
239 | /* disable LCD2 manager */ | |
240 | if (da->manager_count > 2) { | |
241 | v = omap_hwmod_read(oh, DISPC_CONTROL2); | |
242 | v &= ~LCD_EN_MASK; | |
243 | omap_hwmod_write(v, oh, DISPC_CONTROL2); | |
244 | } | |
245 | ||
465698ee CM |
246 | /* disable LCD3 manager */ |
247 | if (da->manager_count > 3) { | |
248 | v = omap_hwmod_read(oh, DISPC_CONTROL3); | |
249 | v &= ~LCD_EN_MASK; | |
250 | omap_hwmod_write(v, oh, DISPC_CONTROL3); | |
251 | } | |
252 | ||
b923d40d AT |
253 | i = 0; |
254 | while ((omap_hwmod_read(oh, DISPC_IRQSTATUS) & irq_mask) != | |
255 | irq_mask) { | |
256 | i++; | |
257 | if (i > FRAMEDONE_IRQ_TIMEOUT) { | |
465698ee | 258 | pr_err("didn't get FRAMEDONE1/2/3 or TV interrupt\n"); |
b923d40d AT |
259 | break; |
260 | } | |
261 | mdelay(1); | |
262 | } | |
263 | } | |
264 | ||
13662dc5 TV |
265 | int omap_dss_reset(struct omap_hwmod *oh) |
266 | { | |
267 | struct omap_hwmod_opt_clk *oc; | |
268 | int c = 0; | |
269 | int i, r; | |
270 | ||
271 | if (!(oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS)) { | |
272 | pr_err("dss_core: hwmod data doesn't contain reset data\n"); | |
273 | return -EINVAL; | |
274 | } | |
275 | ||
276 | for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) | |
277 | if (oc->_clk) | |
4d7cb45e | 278 | clk_prepare_enable(oc->_clk); |
13662dc5 | 279 | |
b923d40d AT |
280 | dispc_disable_outputs(); |
281 | ||
282 | /* clear SDI registers */ | |
283 | if (cpu_is_omap3430()) { | |
284 | omap_hwmod_write(0x0, oh, DSS_SDI_CONTROL); | |
285 | omap_hwmod_write(0x0, oh, DSS_PLL_CONTROL); | |
286 | } | |
287 | ||
288 | /* | |
289 | * clear DSS_CONTROL register to switch DSS clock sources to | |
290 | * PRCM clock, if any | |
291 | */ | |
292 | omap_hwmod_write(0x0, oh, DSS_CONTROL); | |
293 | ||
13662dc5 TV |
294 | omap_test_timeout((omap_hwmod_read(oh, oh->class->sysc->syss_offs) |
295 | & SYSS_RESETDONE_MASK), | |
296 | MAX_MODULE_SOFTRESET_WAIT, c); | |
297 | ||
298 | if (c == MAX_MODULE_SOFTRESET_WAIT) | |
3d0cb73e | 299 | pr_warn("dss_core: waiting for reset to finish failed\n"); |
13662dc5 TV |
300 | else |
301 | pr_debug("dss_core: softreset done\n"); | |
302 | ||
303 | for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) | |
304 | if (oc->_clk) | |
4d7cb45e | 305 | clk_disable_unprepare(oc->_clk); |
13662dc5 TV |
306 | |
307 | r = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0; | |
308 | ||
309 | return r; | |
310 | } | |
dcdf407b | 311 | |
5b5992ac TV |
312 | static const char * const omapdss_compat_names[] __initconst = { |
313 | "ti,omap2-dss", | |
314 | "ti,omap3-dss", | |
315 | "ti,omap4-dss", | |
316 | "ti,omap5-dss", | |
403ee909 | 317 | "ti,dra7-dss", |
5b5992ac TV |
318 | }; |
319 | ||
7afa44e0 | 320 | static struct device_node * __init omapdss_find_dss_of_node(void) |
dcdf407b TV |
321 | { |
322 | struct device_node *node; | |
5b5992ac | 323 | int i; |
dcdf407b | 324 | |
5b5992ac TV |
325 | for (i = 0; i < ARRAY_SIZE(omapdss_compat_names); ++i) { |
326 | node = of_find_compatible_node(NULL, NULL, | |
327 | omapdss_compat_names[i]); | |
328 | if (node) | |
329 | return node; | |
330 | } | |
9a308948 | 331 | |
dcdf407b TV |
332 | return NULL; |
333 | } | |
334 | ||
335 | int __init omapdss_init_of(void) | |
336 | { | |
337 | int r; | |
338 | enum omapdss_version ver; | |
339 | struct device_node *node; | |
340 | struct platform_device *pdev; | |
341 | ||
342 | static struct omap_dss_board_info board_data = { | |
343 | .dsi_enable_pads = omap_dsi_enable_pads, | |
344 | .dsi_disable_pads = omap_dsi_disable_pads, | |
dcdf407b TV |
345 | .set_min_bus_tput = omap_dss_set_min_bus_tput, |
346 | }; | |
347 | ||
348 | /* only create dss helper devices if dss is enabled in the .dts */ | |
349 | ||
350 | node = omapdss_find_dss_of_node(); | |
351 | if (!node) | |
352 | return 0; | |
353 | ||
354 | if (!of_device_is_available(node)) | |
355 | return 0; | |
356 | ||
357 | ver = omap_display_get_version(); | |
358 | ||
359 | if (ver == OMAPDSS_VER_UNKNOWN) { | |
360 | pr_err("DSS not supported on this SoC\n"); | |
361 | return -ENODEV; | |
362 | } | |
363 | ||
364 | pdev = of_find_device_by_node(node); | |
365 | ||
366 | if (!pdev) { | |
367 | pr_err("Unable to find DSS platform device\n"); | |
368 | return -ENODEV; | |
369 | } | |
370 | ||
371 | r = of_platform_populate(node, NULL, NULL, &pdev->dev); | |
372 | if (r) { | |
373 | pr_err("Unable to populate DSS submodule devices\n"); | |
374 | return r; | |
375 | } | |
376 | ||
377 | board_data.version = ver; | |
378 | ||
379 | omap_display_device.dev.platform_data = &board_data; | |
380 | ||
381 | r = platform_device_register(&omap_display_device); | |
382 | if (r < 0) { | |
383 | pr_err("Unable to register omapdss device\n"); | |
384 | return r; | |
385 | } | |
386 | ||
387 | /* create DRM device */ | |
388 | r = omap_init_drm(); | |
389 | if (r < 0) { | |
390 | pr_err("Unable to register omapdrm device\n"); | |
391 | return r; | |
392 | } | |
393 | ||
394 | /* create vrfb device */ | |
395 | r = omap_init_vrfb(); | |
396 | if (r < 0) { | |
397 | pr_err("Unable to register omapvrfb device\n"); | |
398 | return r; | |
399 | } | |
400 | ||
401 | /* create FB device */ | |
402 | r = omap_init_fb(); | |
403 | if (r < 0) { | |
404 | pr_err("Unable to register omapfb device\n"); | |
405 | return r; | |
406 | } | |
407 | ||
408 | /* create V4L2 display device */ | |
409 | r = omap_init_vout(); | |
410 | if (r < 0) { | |
411 | pr_err("Unable to register omap_vout device\n"); | |
412 | return r; | |
413 | } | |
414 | ||
23d34981 TK |
415 | /* add DSI info for omap4 */ |
416 | node = of_find_node_by_name(NULL, "omap4_padconf_global"); | |
417 | if (node) | |
418 | omap4_dsi_mux_syscon = syscon_node_to_regmap(node); | |
419 | ||
dcdf407b TV |
420 | return 0; |
421 | } |