2 * OMAP2plus display device setup / initialization.
4 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
5 * Senthilvadivu Guruswamy
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.
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.
18 #include <linux/string.h>
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/platform_device.h>
23 #include <linux/clk.h>
24 #include <linux/err.h>
25 #include <linux/delay.h>
27 #include <video/omapdss.h>
28 #include <plat/omap_hwmod.h>
29 #include <plat/omap_device.h>
30 #include <plat/omap-pm.h>
38 #define DISPC_CONTROL 0x0040
39 #define DISPC_CONTROL2 0x0238
40 #define DISPC_CONTROL3 0x0848
41 #define DISPC_IRQSTATUS 0x0018
43 #define DSS_SYSCONFIG 0x10
44 #define DSS_SYSSTATUS 0x14
45 #define DSS_CONTROL 0x40
46 #define DSS_SDI_CONTROL 0x44
47 #define DSS_PLL_CONTROL 0x48
49 #define LCD_EN_MASK (0x1 << 0)
50 #define DIGIT_EN_MASK (0x1 << 1)
52 #define FRAMEDONE_IRQ_SHIFT 0
53 #define EVSYNC_EVEN_IRQ_SHIFT 2
54 #define EVSYNC_ODD_IRQ_SHIFT 3
55 #define FRAMEDONE2_IRQ_SHIFT 22
56 #define FRAMEDONE3_IRQ_SHIFT 30
57 #define FRAMEDONETV_IRQ_SHIFT 24
60 * FRAMEDONE_IRQ_TIMEOUT: how long (in milliseconds) to wait during DISPC
61 * reset before deciding that something has gone wrong
63 #define FRAMEDONE_IRQ_TIMEOUT 100
65 static struct platform_device omap_display_device = {
69 .platform_data = NULL,
73 struct omap_dss_hwmod_data {
79 static const struct omap_dss_hwmod_data omap2_dss_hwmod_data[] __initconst = {
80 { "dss_core", "omapdss_dss", -1 },
81 { "dss_dispc", "omapdss_dispc", -1 },
82 { "dss_rfbi", "omapdss_rfbi", -1 },
83 { "dss_venc", "omapdss_venc", -1 },
86 static const struct omap_dss_hwmod_data omap3_dss_hwmod_data[] __initconst = {
87 { "dss_core", "omapdss_dss", -1 },
88 { "dss_dispc", "omapdss_dispc", -1 },
89 { "dss_rfbi", "omapdss_rfbi", -1 },
90 { "dss_venc", "omapdss_venc", -1 },
91 { "dss_dsi1", "omapdss_dsi", 0 },
94 static const struct omap_dss_hwmod_data omap4_dss_hwmod_data[] __initconst = {
95 { "dss_core", "omapdss_dss", -1 },
96 { "dss_dispc", "omapdss_dispc", -1 },
97 { "dss_rfbi", "omapdss_rfbi", -1 },
98 { "dss_dsi1", "omapdss_dsi", 0 },
99 { "dss_dsi2", "omapdss_dsi", 1 },
100 { "dss_hdmi", "omapdss_hdmi", -1 },
103 static void __init omap4_hdmi_mux_pads(enum omap_hdmi_flags flags)
108 omap_mux_init_signal("hdmi_cec",
109 OMAP_PIN_INPUT_PULLUP);
110 omap_mux_init_signal("hdmi_ddc_scl",
111 OMAP_PIN_INPUT_PULLUP);
112 omap_mux_init_signal("hdmi_ddc_sda",
113 OMAP_PIN_INPUT_PULLUP);
116 * CONTROL_I2C_1: HDMI_DDC_SDA_PULLUPRESX (bit 28) and
117 * HDMI_DDC_SCL_PULLUPRESX (bit 24) are set to disable
118 * internal pull up resistor.
120 if (flags & OMAP_HDMI_SDA_SCL_EXTERNAL_PULLUP) {
121 control_i2c_1 = OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_I2C_1;
122 reg = omap4_ctrl_pad_readl(control_i2c_1);
123 reg |= (OMAP4_HDMI_DDC_SDA_PULLUPRESX_MASK |
124 OMAP4_HDMI_DDC_SCL_PULLUPRESX_MASK);
125 omap4_ctrl_pad_writel(reg, control_i2c_1);
129 static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
131 u32 enable_mask, enable_shift;
132 u32 pipd_mask, pipd_shift;
136 enable_mask = OMAP4_DSI1_LANEENABLE_MASK;
137 enable_shift = OMAP4_DSI1_LANEENABLE_SHIFT;
138 pipd_mask = OMAP4_DSI1_PIPD_MASK;
139 pipd_shift = OMAP4_DSI1_PIPD_SHIFT;
140 } else if (dsi_id == 1) {
141 enable_mask = OMAP4_DSI2_LANEENABLE_MASK;
142 enable_shift = OMAP4_DSI2_LANEENABLE_SHIFT;
143 pipd_mask = OMAP4_DSI2_PIPD_MASK;
144 pipd_shift = OMAP4_DSI2_PIPD_SHIFT;
149 reg = omap4_ctrl_pad_readl(OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY);
154 reg |= (lanes << enable_shift) & enable_mask;
155 reg |= (lanes << pipd_shift) & pipd_mask;
157 omap4_ctrl_pad_writel(reg, OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY);
162 int __init omap_hdmi_init(enum omap_hdmi_flags flags)
164 if (cpu_is_omap44xx())
165 omap4_hdmi_mux_pads(flags);
170 static int omap_dsi_enable_pads(int dsi_id, unsigned lane_mask)
172 if (cpu_is_omap44xx())
173 return omap4_dsi_mux_pads(dsi_id, lane_mask);
178 static void omap_dsi_disable_pads(int dsi_id, unsigned lane_mask)
180 if (cpu_is_omap44xx())
181 omap4_dsi_mux_pads(dsi_id, 0);
184 static int omap_dss_set_min_bus_tput(struct device *dev, unsigned long tput)
186 return omap_pm_set_min_bus_tput(dev, OCP_INITIATOR_AGENT, tput);
189 static struct platform_device *create_dss_pdev(const char *pdev_name,
190 int pdev_id, const char *oh_name, void *pdata, int pdata_len,
191 struct platform_device *parent)
193 struct platform_device *pdev;
194 struct omap_device *od;
195 struct omap_hwmod *ohs[1];
196 struct omap_hwmod *oh;
199 oh = omap_hwmod_lookup(oh_name);
201 pr_err("Could not look up %s\n", oh_name);
206 pdev = platform_device_alloc(pdev_name, pdev_id);
208 pr_err("Could not create pdev for %s\n", pdev_name);
214 pdev->dev.parent = &parent->dev;
217 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
219 dev_set_name(&pdev->dev, "%s", pdev->name);
222 od = omap_device_alloc(pdev, ohs, 1, NULL, 0);
224 pr_err("Could not alloc omap_device for %s\n", pdev_name);
229 r = platform_device_add_data(pdev, pdata, pdata_len);
231 pr_err("Could not set pdata for %s\n", pdev_name);
235 r = omap_device_register(pdev);
237 pr_err("Could not register omap_device for %s\n", pdev_name);
247 static struct platform_device *create_simple_dss_pdev(const char *pdev_name,
248 int pdev_id, void *pdata, int pdata_len,
249 struct platform_device *parent)
251 struct platform_device *pdev;
254 pdev = platform_device_alloc(pdev_name, pdev_id);
256 pr_err("Could not create pdev for %s\n", pdev_name);
262 pdev->dev.parent = &parent->dev;
265 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
267 dev_set_name(&pdev->dev, "%s", pdev->name);
269 r = platform_device_add_data(pdev, pdata, pdata_len);
271 pr_err("Could not set pdata for %s\n", pdev_name);
275 r = platform_device_add(pdev);
277 pr_err("Could not register platform_device for %s\n", pdev_name);
287 int __init omap_display_init(struct omap_dss_board_info *board_data)
290 struct platform_device *pdev;
292 const struct omap_dss_hwmod_data *curr_dss_hwmod;
293 struct platform_device *dss_pdev;
295 /* create omapdss device */
297 board_data->dsi_enable_pads = omap_dsi_enable_pads;
298 board_data->dsi_disable_pads = omap_dsi_disable_pads;
299 board_data->get_context_loss_count = omap_pm_get_dev_context_loss_count;
300 board_data->set_min_bus_tput = omap_dss_set_min_bus_tput;
302 omap_display_device.dev.platform_data = board_data;
304 r = platform_device_register(&omap_display_device);
306 pr_err("Unable to register omapdss device\n");
310 /* create devices for dss hwmods */
312 if (cpu_is_omap24xx()) {
313 curr_dss_hwmod = omap2_dss_hwmod_data;
314 oh_count = ARRAY_SIZE(omap2_dss_hwmod_data);
315 } else if (cpu_is_omap34xx()) {
316 curr_dss_hwmod = omap3_dss_hwmod_data;
317 oh_count = ARRAY_SIZE(omap3_dss_hwmod_data);
319 curr_dss_hwmod = omap4_dss_hwmod_data;
320 oh_count = ARRAY_SIZE(omap4_dss_hwmod_data);
324 * First create the pdev for dss_core, which is used as a parent device
325 * by the other dss pdevs. Note: dss_core has to be the first item in
328 dss_pdev = create_dss_pdev(curr_dss_hwmod[0].dev_name,
329 curr_dss_hwmod[0].id,
330 curr_dss_hwmod[0].oh_name,
331 board_data, sizeof(*board_data),
334 if (IS_ERR(dss_pdev)) {
335 pr_err("Could not build omap_device for %s\n",
336 curr_dss_hwmod[0].oh_name);
338 return PTR_ERR(dss_pdev);
341 for (i = 1; i < oh_count; i++) {
342 pdev = create_dss_pdev(curr_dss_hwmod[i].dev_name,
343 curr_dss_hwmod[i].id,
344 curr_dss_hwmod[i].oh_name,
345 board_data, sizeof(*board_data),
349 pr_err("Could not build omap_device for %s\n",
350 curr_dss_hwmod[i].oh_name);
352 return PTR_ERR(pdev);
356 /* Create devices for DPI and SDI */
358 pdev = create_simple_dss_pdev("omapdss_dpi", -1,
359 board_data, sizeof(*board_data), dss_pdev);
361 pr_err("Could not build platform_device for omapdss_dpi\n");
362 return PTR_ERR(pdev);
365 if (cpu_is_omap34xx()) {
366 pdev = create_simple_dss_pdev("omapdss_sdi", -1,
367 board_data, sizeof(*board_data), dss_pdev);
369 pr_err("Could not build platform_device for omapdss_sdi\n");
370 return PTR_ERR(pdev);
377 static void dispc_disable_outputs(void)
380 bool lcd_en, digit_en, lcd2_en = false, lcd3_en = false;
382 struct omap_dss_dispc_dev_attr *da;
383 struct omap_hwmod *oh;
385 oh = omap_hwmod_lookup("dss_dispc");
387 WARN(1, "display: could not disable outputs during reset - could not find dss_dispc hwmod\n");
392 pr_err("display: could not disable outputs during reset due to missing dev_attr\n");
396 da = (struct omap_dss_dispc_dev_attr *)oh->dev_attr;
398 /* store value of LCDENABLE and DIGITENABLE bits */
399 v = omap_hwmod_read(oh, DISPC_CONTROL);
400 lcd_en = v & LCD_EN_MASK;
401 digit_en = v & DIGIT_EN_MASK;
403 /* store value of LCDENABLE for LCD2 */
404 if (da->manager_count > 2) {
405 v = omap_hwmod_read(oh, DISPC_CONTROL2);
406 lcd2_en = v & LCD_EN_MASK;
409 /* store value of LCDENABLE for LCD3 */
410 if (da->manager_count > 3) {
411 v = omap_hwmod_read(oh, DISPC_CONTROL3);
412 lcd3_en = v & LCD_EN_MASK;
415 if (!(lcd_en | digit_en | lcd2_en | lcd3_en))
416 return; /* no managers currently enabled */
419 * If any manager was enabled, we need to disable it before
420 * DSS clocks are disabled or DISPC module is reset
423 irq_mask |= 1 << FRAMEDONE_IRQ_SHIFT;
426 if (da->has_framedonetv_irq) {
427 irq_mask |= 1 << FRAMEDONETV_IRQ_SHIFT;
429 irq_mask |= 1 << EVSYNC_EVEN_IRQ_SHIFT |
430 1 << EVSYNC_ODD_IRQ_SHIFT;
435 irq_mask |= 1 << FRAMEDONE2_IRQ_SHIFT;
437 irq_mask |= 1 << FRAMEDONE3_IRQ_SHIFT;
440 * clear any previous FRAMEDONE, FRAMEDONETV,
441 * EVSYNC_EVEN/ODD, FRAMEDONE2 or FRAMEDONE3 interrupts
443 omap_hwmod_write(irq_mask, oh, DISPC_IRQSTATUS);
445 /* disable LCD and TV managers */
446 v = omap_hwmod_read(oh, DISPC_CONTROL);
447 v &= ~(LCD_EN_MASK | DIGIT_EN_MASK);
448 omap_hwmod_write(v, oh, DISPC_CONTROL);
450 /* disable LCD2 manager */
451 if (da->manager_count > 2) {
452 v = omap_hwmod_read(oh, DISPC_CONTROL2);
454 omap_hwmod_write(v, oh, DISPC_CONTROL2);
457 /* disable LCD3 manager */
458 if (da->manager_count > 3) {
459 v = omap_hwmod_read(oh, DISPC_CONTROL3);
461 omap_hwmod_write(v, oh, DISPC_CONTROL3);
465 while ((omap_hwmod_read(oh, DISPC_IRQSTATUS) & irq_mask) !=
468 if (i > FRAMEDONE_IRQ_TIMEOUT) {
469 pr_err("didn't get FRAMEDONE1/2/3 or TV interrupt\n");
476 #define MAX_MODULE_SOFTRESET_WAIT 10000
477 int omap_dss_reset(struct omap_hwmod *oh)
479 struct omap_hwmod_opt_clk *oc;
483 if (!(oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS)) {
484 pr_err("dss_core: hwmod data doesn't contain reset data\n");
488 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
490 clk_prepare_enable(oc->_clk);
492 dispc_disable_outputs();
494 /* clear SDI registers */
495 if (cpu_is_omap3430()) {
496 omap_hwmod_write(0x0, oh, DSS_SDI_CONTROL);
497 omap_hwmod_write(0x0, oh, DSS_PLL_CONTROL);
501 * clear DSS_CONTROL register to switch DSS clock sources to
504 omap_hwmod_write(0x0, oh, DSS_CONTROL);
506 omap_test_timeout((omap_hwmod_read(oh, oh->class->sysc->syss_offs)
507 & SYSS_RESETDONE_MASK),
508 MAX_MODULE_SOFTRESET_WAIT, c);
510 if (c == MAX_MODULE_SOFTRESET_WAIT)
511 pr_warning("dss_core: waiting for reset to finish failed\n");
513 pr_debug("dss_core: softreset done\n");
515 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
517 clk_disable_unprepare(oc->_clk);
519 r = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0;