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1 | /* |
2 | * OPA362 analog video amplifier with output/power control | |
3 | * | |
4 | * Copyright (C) 2014 Golden Delicious Computers | |
5 | * Author: H. Nikolaus Schaller <hns@goldelico.com> | |
6 | * | |
7 | * based on encoder-tfp410 | |
8 | * | |
9 | * Copyright (C) 2013 Texas Instruments | |
10 | * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License version 2 as published by | |
14 | * the Free Software Foundation. | |
15 | */ | |
16 | ||
d9e32ecd | 17 | #include <linux/gpio/consumer.h> |
0e878731 MB |
18 | #include <linux/module.h> |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/of_gpio.h> | |
22 | ||
23 | #include <video/omapdss.h> | |
24 | ||
25 | struct panel_drv_data { | |
26 | struct omap_dss_device dssdev; | |
27 | struct omap_dss_device *in; | |
28 | ||
29 | struct gpio_desc *enable_gpio; | |
30 | ||
31 | struct omap_video_timings timings; | |
32 | }; | |
33 | ||
34 | #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev) | |
35 | ||
36 | static int opa362_connect(struct omap_dss_device *dssdev, | |
37 | struct omap_dss_device *dst) | |
38 | { | |
39 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
40 | struct omap_dss_device *in = ddata->in; | |
41 | int r; | |
42 | ||
43 | dev_dbg(dssdev->dev, "connect\n"); | |
44 | ||
45 | if (omapdss_device_is_connected(dssdev)) | |
46 | return -EBUSY; | |
47 | ||
48 | r = in->ops.atv->connect(in, dssdev); | |
49 | if (r) | |
50 | return r; | |
51 | ||
52 | dst->src = dssdev; | |
53 | dssdev->dst = dst; | |
54 | ||
55 | return 0; | |
56 | } | |
57 | ||
58 | static void opa362_disconnect(struct omap_dss_device *dssdev, | |
59 | struct omap_dss_device *dst) | |
60 | { | |
61 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
62 | struct omap_dss_device *in = ddata->in; | |
63 | ||
64 | dev_dbg(dssdev->dev, "disconnect\n"); | |
65 | ||
66 | WARN_ON(!omapdss_device_is_connected(dssdev)); | |
67 | if (!omapdss_device_is_connected(dssdev)) | |
68 | return; | |
69 | ||
70 | WARN_ON(dst != dssdev->dst); | |
71 | if (dst != dssdev->dst) | |
72 | return; | |
73 | ||
74 | dst->src = NULL; | |
75 | dssdev->dst = NULL; | |
76 | ||
77 | in->ops.atv->disconnect(in, &ddata->dssdev); | |
78 | } | |
79 | ||
80 | static int opa362_enable(struct omap_dss_device *dssdev) | |
81 | { | |
82 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
83 | struct omap_dss_device *in = ddata->in; | |
84 | int r; | |
85 | ||
86 | dev_dbg(dssdev->dev, "enable\n"); | |
87 | ||
88 | if (!omapdss_device_is_connected(dssdev)) | |
89 | return -ENODEV; | |
90 | ||
91 | if (omapdss_device_is_enabled(dssdev)) | |
92 | return 0; | |
93 | ||
94 | in->ops.atv->set_timings(in, &ddata->timings); | |
95 | ||
96 | r = in->ops.atv->enable(in); | |
97 | if (r) | |
98 | return r; | |
99 | ||
100 | if (ddata->enable_gpio) | |
101 | gpiod_set_value_cansleep(ddata->enable_gpio, 1); | |
102 | ||
103 | dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | static void opa362_disable(struct omap_dss_device *dssdev) | |
109 | { | |
110 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
111 | struct omap_dss_device *in = ddata->in; | |
112 | ||
113 | dev_dbg(dssdev->dev, "disable\n"); | |
114 | ||
115 | if (!omapdss_device_is_enabled(dssdev)) | |
116 | return; | |
117 | ||
118 | if (ddata->enable_gpio) | |
119 | gpiod_set_value_cansleep(ddata->enable_gpio, 0); | |
120 | ||
121 | in->ops.atv->disable(in); | |
122 | ||
123 | dssdev->state = OMAP_DSS_DISPLAY_DISABLED; | |
124 | } | |
125 | ||
126 | static void opa362_set_timings(struct omap_dss_device *dssdev, | |
127 | struct omap_video_timings *timings) | |
128 | { | |
129 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
130 | struct omap_dss_device *in = ddata->in; | |
131 | ||
132 | dev_dbg(dssdev->dev, "set_timings\n"); | |
133 | ||
134 | ddata->timings = *timings; | |
135 | dssdev->panel.timings = *timings; | |
136 | ||
137 | in->ops.atv->set_timings(in, timings); | |
138 | } | |
139 | ||
140 | static void opa362_get_timings(struct omap_dss_device *dssdev, | |
141 | struct omap_video_timings *timings) | |
142 | { | |
143 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
144 | ||
145 | dev_dbg(dssdev->dev, "get_timings\n"); | |
146 | ||
147 | *timings = ddata->timings; | |
148 | } | |
149 | ||
150 | static int opa362_check_timings(struct omap_dss_device *dssdev, | |
151 | struct omap_video_timings *timings) | |
152 | { | |
153 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
154 | struct omap_dss_device *in = ddata->in; | |
155 | ||
156 | dev_dbg(dssdev->dev, "check_timings\n"); | |
157 | ||
158 | return in->ops.atv->check_timings(in, timings); | |
159 | } | |
160 | ||
161 | static void opa362_set_type(struct omap_dss_device *dssdev, | |
162 | enum omap_dss_venc_type type) | |
163 | { | |
164 | /* we can only drive a COMPOSITE output */ | |
165 | WARN_ON(type != OMAP_DSS_VENC_TYPE_COMPOSITE); | |
166 | ||
167 | } | |
168 | ||
169 | static const struct omapdss_atv_ops opa362_atv_ops = { | |
170 | .connect = opa362_connect, | |
171 | .disconnect = opa362_disconnect, | |
172 | ||
173 | .enable = opa362_enable, | |
174 | .disable = opa362_disable, | |
175 | ||
176 | .check_timings = opa362_check_timings, | |
177 | .set_timings = opa362_set_timings, | |
178 | .get_timings = opa362_get_timings, | |
179 | ||
180 | .set_type = opa362_set_type, | |
181 | }; | |
182 | ||
183 | static int opa362_probe(struct platform_device *pdev) | |
184 | { | |
185 | struct device_node *node = pdev->dev.of_node; | |
186 | struct panel_drv_data *ddata; | |
187 | struct omap_dss_device *dssdev, *in; | |
188 | struct gpio_desc *gpio; | |
189 | int r; | |
190 | ||
191 | dev_dbg(&pdev->dev, "probe\n"); | |
192 | ||
193 | if (node == NULL) { | |
194 | dev_err(&pdev->dev, "Unable to find device tree\n"); | |
195 | return -EINVAL; | |
196 | } | |
197 | ||
198 | ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); | |
199 | if (!ddata) | |
200 | return -ENOMEM; | |
201 | ||
202 | platform_set_drvdata(pdev, ddata); | |
203 | ||
ca8c67da UKK |
204 | gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW); |
205 | if (IS_ERR(gpio)) | |
206 | return PTR_ERR(gpio); | |
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207 | |
208 | ddata->enable_gpio = gpio; | |
209 | ||
210 | in = omapdss_of_find_source_for_first_ep(node); | |
211 | if (IS_ERR(in)) { | |
212 | dev_err(&pdev->dev, "failed to find video source\n"); | |
213 | return PTR_ERR(in); | |
214 | } | |
215 | ||
216 | ddata->in = in; | |
217 | ||
218 | dssdev = &ddata->dssdev; | |
219 | dssdev->ops.atv = &opa362_atv_ops; | |
220 | dssdev->dev = &pdev->dev; | |
221 | dssdev->type = OMAP_DISPLAY_TYPE_VENC; | |
222 | dssdev->output_type = OMAP_DISPLAY_TYPE_VENC; | |
223 | dssdev->owner = THIS_MODULE; | |
224 | ||
225 | r = omapdss_register_output(dssdev); | |
226 | if (r) { | |
227 | dev_err(&pdev->dev, "Failed to register output\n"); | |
228 | goto err_reg; | |
229 | } | |
230 | ||
231 | return 0; | |
232 | err_reg: | |
233 | omap_dss_put_device(ddata->in); | |
234 | return r; | |
235 | } | |
236 | ||
237 | static int __exit opa362_remove(struct platform_device *pdev) | |
238 | { | |
239 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); | |
240 | struct omap_dss_device *dssdev = &ddata->dssdev; | |
241 | struct omap_dss_device *in = ddata->in; | |
242 | ||
243 | omapdss_unregister_output(&ddata->dssdev); | |
244 | ||
245 | WARN_ON(omapdss_device_is_enabled(dssdev)); | |
246 | if (omapdss_device_is_enabled(dssdev)) | |
247 | opa362_disable(dssdev); | |
248 | ||
249 | WARN_ON(omapdss_device_is_connected(dssdev)); | |
250 | if (omapdss_device_is_connected(dssdev)) | |
251 | opa362_disconnect(dssdev, dssdev->dst); | |
252 | ||
253 | omap_dss_put_device(in); | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static const struct of_device_id opa362_of_match[] = { | |
259 | { .compatible = "omapdss,ti,opa362", }, | |
260 | {}, | |
261 | }; | |
262 | MODULE_DEVICE_TABLE(of, opa362_of_match); | |
263 | ||
264 | static struct platform_driver opa362_driver = { | |
265 | .probe = opa362_probe, | |
266 | .remove = __exit_p(opa362_remove), | |
267 | .driver = { | |
268 | .name = "amplifier-opa362", | |
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269 | .of_match_table = opa362_of_match, |
270 | .suppress_bind_attrs = true, | |
271 | }, | |
272 | }; | |
273 | ||
274 | module_platform_driver(opa362_driver); | |
275 | ||
276 | MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>"); | |
277 | MODULE_DESCRIPTION("OPA362 analog video amplifier with output/power control"); | |
278 | MODULE_LICENSE("GPL v2"); |