2  * Copyright © 2016-2017 Broadcom
8  * Portions of this file (derived from panel-simple.c) are:
25  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
36  * TC358762XBG DSI-DPI bridge, and an I2C-connected Atmel ATTINY88-MUR
59 #define RPI_DSI_DRIVER_NAME "rpi-ts-dsi"
63 	REG_ID = 0x80,
84 /* DSI D-PHY Layer Registers */
85 #define D0W_DPHYCONTTX		0x0004
86 #define CLW_DPHYCONTRX		0x0020
87 #define D0W_DPHYCONTRX		0x0024
88 #define D1W_DPHYCONTRX		0x0028
89 #define COM_DPHYCONTRX		0x0038
90 #define CLW_CNTRL		0x0040
91 #define D0W_CNTRL		0x0044
92 #define D1W_CNTRL		0x0048
93 #define DFTMODE_CNTRL		0x0054
96 #define PPI_STARTPPI		0x0104
97 #define PPI_BUSYPPI		0x0108
98 #define PPI_LINEINITCNT		0x0110
99 #define PPI_LPTXTIMECNT		0x0114
100 #define PPI_CLS_ATMR		0x0140
101 #define PPI_D0S_ATMR		0x0144
102 #define PPI_D1S_ATMR		0x0148
103 #define PPI_D0S_CLRSIPOCOUNT	0x0164
104 #define PPI_D1S_CLRSIPOCOUNT	0x0168
105 #define CLS_PRE			0x0180
106 #define D0S_PRE			0x0184
107 #define D1S_PRE			0x0188
108 #define CLS_PREP		0x01A0
109 #define D0S_PREP		0x01A4
110 #define D1S_PREP		0x01A8
111 #define CLS_ZERO		0x01C0
112 #define D0S_ZERO		0x01C4
113 #define D1S_ZERO		0x01C8
114 #define PPI_CLRFLG		0x01E0
115 #define PPI_CLRSIPO		0x01E4
116 #define HSTIMEOUT		0x01F0
117 #define HSTIMEOUTENABLE		0x01F4
120 #define DSI_STARTDSI		0x0204
121 #define DSI_BUSYDSI		0x0208
122 #define DSI_LANEENABLE		0x0210
123 # define DSI_LANEENABLE_CLOCK		BIT(0)
127 #define DSI_LANESTATUS0		0x0214
128 #define DSI_LANESTATUS1		0x0218
129 #define DSI_INTSTATUS		0x0220
130 #define DSI_INTMASK		0x0224
131 #define DSI_INTCLR		0x0228
132 #define DSI_LPTXTO		0x0230
133 #define DSI_MODE		0x0260
134 #define DSI_PAYLOAD0		0x0268
135 #define DSI_PAYLOAD1		0x026C
136 #define DSI_SHORTPKTDAT		0x0270
137 #define DSI_SHORTPKTREQ		0x0274
138 #define DSI_BTASTA		0x0278
139 #define DSI_BTACLR		0x027C
142 #define DSIERRCNT		0x0300
143 #define DSISIGMOD		0x0304
146 #define APLCTRL			0x0400
147 #define APLSTAT			0x0404
148 #define APLERR			0x0408
149 #define PWRMOD			0x040C
150 #define RDPKTLN			0x0410
151 #define PXLFMT			0x0414
152 #define MEMWRCMD		0x0418
155 #define LCDCTRL			0x0420
156 #define HSR			0x0424
157 #define HDISPR			0x0428
158 #define VSR			0x042C
159 #define VDISPR			0x0430
160 #define VFUEN			0x0434
162 /* DBI-B Host Registers */
163 #define DBIBCTRL		0x0440
166 #define SPICMR			0x0450
167 #define SPITCR			0x0454
170 #define SYSSTAT			0x0460
171 #define SYSCTRL			0x0464
172 #define SYSPLL1			0x0468
173 #define SYSPLL2			0x046C
174 #define SYSPLL3			0x0470
175 #define SYSPMCTRL		0x047C
178 #define GPIOC			0x0480
179 #define GPIOO			0x0484
180 #define GPIOI			0x0488
183 #define I2CCLKCTRL		0x0490
186 #define IDREG			0x04A0
189 #define WCMDQUEUE		0x0500
190 #define RCMDQUEUE		0x0504
201 		 * plugged in and clock re-computed from that.
222 	return i2c_smbus_read_byte_data(ts->i2c, reg);  in rpi_touchscreen_i2c_read()
230 	ret = i2c_smbus_write_byte_data(ts->i2c, reg, val);  in rpi_touchscreen_i2c_write()
232 		dev_err(&ts->dsi->dev, "I2C write failed: %d\n", ret);  in rpi_touchscreen_i2c_write()
246 	mipi_dsi_generic_write(ts->dsi, msg, sizeof(msg));  in rpi_touchscreen_write()
248 	return 0;  in rpi_touchscreen_write()
255 	rpi_touchscreen_i2c_write(ts, REG_PWM, 0);  in rpi_touchscreen_disable()
257 	rpi_touchscreen_i2c_write(ts, REG_POWERON, 0);  in rpi_touchscreen_disable()
260 	return 0;  in rpi_touchscreen_disable()
265 	return 0;  in rpi_touchscreen_noop()
275 	for (i = 0; i < 100; i++) {  in rpi_touchscreen_enable()
283 	rpi_touchscreen_write(ts, PPI_D0S_CLRSIPOCOUNT, 0x05);  in rpi_touchscreen_enable()
284 	rpi_touchscreen_write(ts, PPI_D1S_CLRSIPOCOUNT, 0x05);  in rpi_touchscreen_enable()
285 	rpi_touchscreen_write(ts, PPI_D0S_ATMR, 0x00);  in rpi_touchscreen_enable()
286 	rpi_touchscreen_write(ts, PPI_D1S_ATMR, 0x00);  in rpi_touchscreen_enable()
287 	rpi_touchscreen_write(ts, PPI_LPTXTIMECNT, 0x03);  in rpi_touchscreen_enable()
289 	rpi_touchscreen_write(ts, SPICMR, 0x00);  in rpi_touchscreen_enable()
290 	rpi_touchscreen_write(ts, LCDCTRL, 0x00100150);  in rpi_touchscreen_enable()
291 	rpi_touchscreen_write(ts, SYSCTRL, 0x040f);  in rpi_touchscreen_enable()
294 	rpi_touchscreen_write(ts, PPI_STARTPPI, 0x01);  in rpi_touchscreen_enable()
295 	rpi_touchscreen_write(ts, DSI_STARTDSI, 0x01);  in rpi_touchscreen_enable()
308 	return 0;  in rpi_touchscreen_enable()
314 	unsigned int i, num = 0;  in rpi_touchscreen_get_modes()
317 	for (i = 0; i < ARRAY_SIZE(rpi_touchscreen_modes); i++) {  in rpi_touchscreen_get_modes()
321 		mode = drm_mode_duplicate(connector->dev, m);  in rpi_touchscreen_get_modes()
323 			dev_err(panel->dev, "failed to add mode %ux%u@%u\n",  in rpi_touchscreen_get_modes()
324 				m->hdisplay, m->vdisplay,  in rpi_touchscreen_get_modes()
329 		mode->type |= DRM_MODE_TYPE_DRIVER;  in rpi_touchscreen_get_modes()
331 		if (i == 0)  in rpi_touchscreen_get_modes()
332 			mode->type |= DRM_MODE_TYPE_PREFERRED;  in rpi_touchscreen_get_modes()
340 	connector->display_info.bpc = 8;  in rpi_touchscreen_get_modes()
341 	connector->display_info.width_mm = 154;  in rpi_touchscreen_get_modes()
342 	connector->display_info.height_mm = 86;  in rpi_touchscreen_get_modes()
343 	drm_display_info_set_bus_formats(&connector->display_info,  in rpi_touchscreen_get_modes()
360 	struct device *dev = &i2c->dev;  in rpi_touchscreen_probe()
367 		.channel = 0,  in rpi_touchscreen_probe()
373 		return -ENOMEM;  in rpi_touchscreen_probe()
377 	ts->i2c = i2c;  in rpi_touchscreen_probe()
380 	if (ver < 0) {  in rpi_touchscreen_probe()
382 		return -ENODEV;  in rpi_touchscreen_probe()
386 	case 0xde: /* ver 1 */  in rpi_touchscreen_probe()
387 	case 0xc3: /* ver 2 */  in rpi_touchscreen_probe()
390 		dev_err(dev, "Unknown Atmel firmware revision: 0x%02x\n", ver);  in rpi_touchscreen_probe()
391 		return -ENODEV;  in rpi_touchscreen_probe()
395 	rpi_touchscreen_i2c_write(ts, REG_POWERON, 0);  in rpi_touchscreen_probe()
398 	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);  in rpi_touchscreen_probe()
400 		return -ENODEV;  in rpi_touchscreen_probe()
410 		return -EPROBE_DEFER;  in rpi_touchscreen_probe()
419 	ts->dsi = mipi_dsi_device_register_full(host, &info);  in rpi_touchscreen_probe()
420 	if (IS_ERR(ts->dsi)) {  in rpi_touchscreen_probe()
422 			PTR_ERR(ts->dsi));  in rpi_touchscreen_probe()
423 		return PTR_ERR(ts->dsi);  in rpi_touchscreen_probe()
426 	drm_panel_init(&ts->base, dev, &rpi_touchscreen_funcs,  in rpi_touchscreen_probe()
432 	drm_panel_add(&ts->base);  in rpi_touchscreen_probe()
434 	return 0;  in rpi_touchscreen_probe()
438 	return -ENODEV;  in rpi_touchscreen_probe()
445 	mipi_dsi_detach(ts->dsi);  in rpi_touchscreen_remove()
447 	drm_panel_remove(&ts->base);  in rpi_touchscreen_remove()
449 	mipi_dsi_device_unregister(ts->dsi);  in rpi_touchscreen_remove()
450 	kfree(ts->dsi);  in rpi_touchscreen_remove()
452 	return 0;  in rpi_touchscreen_remove()
459 	dsi->mode_flags = (MIPI_DSI_MODE_VIDEO |  in rpi_touchscreen_dsi_probe()
462 	dsi->format = MIPI_DSI_FMT_RGB888;  in rpi_touchscreen_dsi_probe()
463 	dsi->lanes = 1;  in rpi_touchscreen_dsi_probe()
468 		dev_err(&dsi->dev, "failed to attach dsi to host: %d\n", ret);  in rpi_touchscreen_dsi_probe()
479 	{ .compatible = "raspberrypi,7inch-touchscreen-panel" },
508 MODULE_DESCRIPTION("Raspberry Pi 7-inch touchscreen driver");