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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f76ee892 TV |
2 | /* |
3 | * OPA362 analog video amplifier with output/power control | |
4 | * | |
5 | * Copyright (C) 2014 Golden Delicious Computers | |
6 | * Author: H. Nikolaus Schaller <hns@goldelico.com> | |
7 | * | |
8 | * based on encoder-tfp410 | |
9 | * | |
10 | * Copyright (C) 2013 Texas Instruments | |
11 | * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> | |
f76ee892 TV |
12 | */ |
13 | ||
14 | #include <linux/gpio.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/platform_device.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/of_gpio.h> | |
19 | ||
62d9e44e | 20 | #include <video/omapfb_dss.h> |
f76ee892 TV |
21 | |
22 | struct panel_drv_data { | |
23 | struct omap_dss_device dssdev; | |
24 | struct omap_dss_device *in; | |
25 | ||
26 | struct gpio_desc *enable_gpio; | |
27 | ||
28 | struct omap_video_timings timings; | |
29 | }; | |
30 | ||
31 | #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev) | |
32 | ||
33 | static int opa362_connect(struct omap_dss_device *dssdev, | |
34 | struct omap_dss_device *dst) | |
35 | { | |
36 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
37 | struct omap_dss_device *in = ddata->in; | |
38 | int r; | |
39 | ||
40 | dev_dbg(dssdev->dev, "connect\n"); | |
41 | ||
42 | if (omapdss_device_is_connected(dssdev)) | |
43 | return -EBUSY; | |
44 | ||
45 | r = in->ops.atv->connect(in, dssdev); | |
46 | if (r) | |
47 | return r; | |
48 | ||
49 | dst->src = dssdev; | |
50 | dssdev->dst = dst; | |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
55 | static void opa362_disconnect(struct omap_dss_device *dssdev, | |
56 | struct omap_dss_device *dst) | |
57 | { | |
58 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
59 | struct omap_dss_device *in = ddata->in; | |
60 | ||
61 | dev_dbg(dssdev->dev, "disconnect\n"); | |
62 | ||
63 | WARN_ON(!omapdss_device_is_connected(dssdev)); | |
64 | if (!omapdss_device_is_connected(dssdev)) | |
65 | return; | |
66 | ||
67 | WARN_ON(dst != dssdev->dst); | |
68 | if (dst != dssdev->dst) | |
69 | return; | |
70 | ||
71 | dst->src = NULL; | |
72 | dssdev->dst = NULL; | |
73 | ||
74 | in->ops.atv->disconnect(in, &ddata->dssdev); | |
75 | } | |
76 | ||
77 | static int opa362_enable(struct omap_dss_device *dssdev) | |
78 | { | |
79 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
80 | struct omap_dss_device *in = ddata->in; | |
81 | int r; | |
82 | ||
83 | dev_dbg(dssdev->dev, "enable\n"); | |
84 | ||
85 | if (!omapdss_device_is_connected(dssdev)) | |
86 | return -ENODEV; | |
87 | ||
88 | if (omapdss_device_is_enabled(dssdev)) | |
89 | return 0; | |
90 | ||
91 | in->ops.atv->set_timings(in, &ddata->timings); | |
92 | ||
93 | r = in->ops.atv->enable(in); | |
94 | if (r) | |
95 | return r; | |
96 | ||
97 | if (ddata->enable_gpio) | |
98 | gpiod_set_value_cansleep(ddata->enable_gpio, 1); | |
99 | ||
100 | dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | static void opa362_disable(struct omap_dss_device *dssdev) | |
106 | { | |
107 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
108 | struct omap_dss_device *in = ddata->in; | |
109 | ||
110 | dev_dbg(dssdev->dev, "disable\n"); | |
111 | ||
112 | if (!omapdss_device_is_enabled(dssdev)) | |
113 | return; | |
114 | ||
115 | if (ddata->enable_gpio) | |
116 | gpiod_set_value_cansleep(ddata->enable_gpio, 0); | |
117 | ||
118 | in->ops.atv->disable(in); | |
119 | ||
120 | dssdev->state = OMAP_DSS_DISPLAY_DISABLED; | |
121 | } | |
122 | ||
123 | static void opa362_set_timings(struct omap_dss_device *dssdev, | |
124 | struct omap_video_timings *timings) | |
125 | { | |
126 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
127 | struct omap_dss_device *in = ddata->in; | |
128 | ||
129 | dev_dbg(dssdev->dev, "set_timings\n"); | |
130 | ||
131 | ddata->timings = *timings; | |
132 | dssdev->panel.timings = *timings; | |
133 | ||
134 | in->ops.atv->set_timings(in, timings); | |
135 | } | |
136 | ||
137 | static void opa362_get_timings(struct omap_dss_device *dssdev, | |
138 | struct omap_video_timings *timings) | |
139 | { | |
140 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
141 | ||
142 | dev_dbg(dssdev->dev, "get_timings\n"); | |
143 | ||
144 | *timings = ddata->timings; | |
145 | } | |
146 | ||
147 | static int opa362_check_timings(struct omap_dss_device *dssdev, | |
148 | struct omap_video_timings *timings) | |
149 | { | |
150 | struct panel_drv_data *ddata = to_panel_data(dssdev); | |
151 | struct omap_dss_device *in = ddata->in; | |
152 | ||
153 | dev_dbg(dssdev->dev, "check_timings\n"); | |
154 | ||
155 | return in->ops.atv->check_timings(in, timings); | |
156 | } | |
157 | ||
158 | static void opa362_set_type(struct omap_dss_device *dssdev, | |
159 | enum omap_dss_venc_type type) | |
160 | { | |
161 | /* we can only drive a COMPOSITE output */ | |
162 | WARN_ON(type != OMAP_DSS_VENC_TYPE_COMPOSITE); | |
163 | ||
164 | } | |
165 | ||
166 | static const struct omapdss_atv_ops opa362_atv_ops = { | |
167 | .connect = opa362_connect, | |
168 | .disconnect = opa362_disconnect, | |
169 | ||
170 | .enable = opa362_enable, | |
171 | .disable = opa362_disable, | |
172 | ||
173 | .check_timings = opa362_check_timings, | |
174 | .set_timings = opa362_set_timings, | |
175 | .get_timings = opa362_get_timings, | |
176 | ||
177 | .set_type = opa362_set_type, | |
178 | }; | |
179 | ||
180 | static int opa362_probe(struct platform_device *pdev) | |
181 | { | |
182 | struct device_node *node = pdev->dev.of_node; | |
183 | struct panel_drv_data *ddata; | |
184 | struct omap_dss_device *dssdev, *in; | |
185 | struct gpio_desc *gpio; | |
186 | int r; | |
187 | ||
188 | dev_dbg(&pdev->dev, "probe\n"); | |
189 | ||
190 | if (node == NULL) { | |
191 | dev_err(&pdev->dev, "Unable to find device tree\n"); | |
192 | return -EINVAL; | |
193 | } | |
194 | ||
195 | ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); | |
196 | if (!ddata) | |
197 | return -ENOMEM; | |
198 | ||
199 | platform_set_drvdata(pdev, ddata); | |
200 | ||
201 | gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW); | |
202 | if (IS_ERR(gpio)) | |
203 | return PTR_ERR(gpio); | |
204 | ||
205 | ddata->enable_gpio = gpio; | |
206 | ||
207 | in = omapdss_of_find_source_for_first_ep(node); | |
208 | if (IS_ERR(in)) { | |
209 | dev_err(&pdev->dev, "failed to find video source\n"); | |
210 | return PTR_ERR(in); | |
211 | } | |
212 | ||
213 | ddata->in = in; | |
214 | ||
215 | dssdev = &ddata->dssdev; | |
216 | dssdev->ops.atv = &opa362_atv_ops; | |
217 | dssdev->dev = &pdev->dev; | |
218 | dssdev->type = OMAP_DISPLAY_TYPE_VENC; | |
219 | dssdev->output_type = OMAP_DISPLAY_TYPE_VENC; | |
220 | dssdev->owner = THIS_MODULE; | |
221 | ||
222 | r = omapdss_register_output(dssdev); | |
223 | if (r) { | |
224 | dev_err(&pdev->dev, "Failed to register output\n"); | |
225 | goto err_reg; | |
226 | } | |
227 | ||
228 | return 0; | |
229 | err_reg: | |
230 | omap_dss_put_device(ddata->in); | |
231 | return r; | |
232 | } | |
233 | ||
234 | static int __exit opa362_remove(struct platform_device *pdev) | |
235 | { | |
236 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); | |
237 | struct omap_dss_device *dssdev = &ddata->dssdev; | |
238 | struct omap_dss_device *in = ddata->in; | |
239 | ||
240 | omapdss_unregister_output(&ddata->dssdev); | |
241 | ||
242 | WARN_ON(omapdss_device_is_enabled(dssdev)); | |
243 | if (omapdss_device_is_enabled(dssdev)) | |
244 | opa362_disable(dssdev); | |
245 | ||
246 | WARN_ON(omapdss_device_is_connected(dssdev)); | |
247 | if (omapdss_device_is_connected(dssdev)) | |
248 | opa362_disconnect(dssdev, dssdev->dst); | |
249 | ||
250 | omap_dss_put_device(in); | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | static const struct of_device_id opa362_of_match[] = { | |
256 | { .compatible = "omapdss,ti,opa362", }, | |
257 | {}, | |
258 | }; | |
259 | MODULE_DEVICE_TABLE(of, opa362_of_match); | |
260 | ||
261 | static struct platform_driver opa362_driver = { | |
262 | .probe = opa362_probe, | |
263 | .remove = __exit_p(opa362_remove), | |
264 | .driver = { | |
265 | .name = "amplifier-opa362", | |
266 | .of_match_table = opa362_of_match, | |
267 | .suppress_bind_attrs = true, | |
268 | }, | |
269 | }; | |
270 | ||
271 | module_platform_driver(opa362_driver); | |
272 | ||
273 | MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>"); | |
274 | MODULE_DESCRIPTION("OPA362 analog video amplifier with output/power control"); | |
275 | MODULE_LICENSE("GPL v2"); |