/* * Copyright © 2016-2017 Broadcom * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Portions of this file (derived from panel-simple.c) are: * * Copyright (C) 2013, NVIDIA Corporation. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sub license, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ /* * Raspberry Pi 7" touchscreen panel driver. * * The 7" touchscreen consists of a DPI LCD panel, a Toshiba * TC358762XBG DSI-DPI bridge, and an I2C-connected Atmel ATTINY88-MUR * controlling power management, the LCD PWM, and initial register * setup of the Tohsiba. * * This driver controls the TC358762 and ATTINY88, presenting a DSI * device with a drm_panel. */ #include <linux/delay.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/media-bus-format.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_graph.h> #include <linux/pm.h> #include <drm/drm_crtc.h> #include <drm/drm_device.h> #include <drm/drm_mipi_dsi.h> #include <drm/drm_panel.h> #define RPI_DSI_DRIVER_NAME … /* I2C registers of the Atmel microcontroller. */ enum REG_ADDR { … }; /* DSI D-PHY Layer Registers */ #define D0W_DPHYCONTTX … #define CLW_DPHYCONTRX … #define D0W_DPHYCONTRX … #define D1W_DPHYCONTRX … #define COM_DPHYCONTRX … #define CLW_CNTRL … #define D0W_CNTRL … #define D1W_CNTRL … #define DFTMODE_CNTRL … /* DSI PPI Layer Registers */ #define PPI_STARTPPI … #define PPI_BUSYPPI … #define PPI_LINEINITCNT … #define PPI_LPTXTIMECNT … #define PPI_CLS_ATMR … #define PPI_D0S_ATMR … #define PPI_D1S_ATMR … #define PPI_D0S_CLRSIPOCOUNT … #define PPI_D1S_CLRSIPOCOUNT … #define CLS_PRE … #define D0S_PRE … #define D1S_PRE … #define CLS_PREP … #define D0S_PREP … #define D1S_PREP … #define CLS_ZERO … #define D0S_ZERO … #define D1S_ZERO … #define PPI_CLRFLG … #define PPI_CLRSIPO … #define HSTIMEOUT … #define HSTIMEOUTENABLE … /* DSI Protocol Layer Registers */ #define DSI_STARTDSI … #define DSI_BUSYDSI … #define DSI_LANEENABLE … #define DSI_LANEENABLE_CLOCK … #define DSI_LANEENABLE_D0 … #define DSI_LANEENABLE_D1 … #define DSI_LANESTATUS0 … #define DSI_LANESTATUS1 … #define DSI_INTSTATUS … #define DSI_INTMASK … #define DSI_INTCLR … #define DSI_LPTXTO … #define DSI_MODE … #define DSI_PAYLOAD0 … #define DSI_PAYLOAD1 … #define DSI_SHORTPKTDAT … #define DSI_SHORTPKTREQ … #define DSI_BTASTA … #define DSI_BTACLR … /* DSI General Registers */ #define DSIERRCNT … #define DSISIGMOD … /* DSI Application Layer Registers */ #define APLCTRL … #define APLSTAT … #define APLERR … #define PWRMOD … #define RDPKTLN … #define PXLFMT … #define MEMWRCMD … /* LCDC/DPI Host Registers */ #define LCDCTRL … #define HSR … #define HDISPR … #define VSR … #define VDISPR … #define VFUEN … /* DBI-B Host Registers */ #define DBIBCTRL … /* SPI Master Registers */ #define SPICMR … #define SPITCR … /* System Controller Registers */ #define SYSSTAT … #define SYSCTRL … #define SYSPLL1 … #define SYSPLL2 … #define SYSPLL3 … #define SYSPMCTRL … /* GPIO Registers */ #define GPIOC … #define GPIOO … #define GPIOI … /* I2C Registers */ #define I2CCLKCTRL … /* Chip/Rev Registers */ #define IDREG … /* Debug Registers */ #define WCMDQUEUE … #define RCMDQUEUE … struct rpi_touchscreen { … }; static const struct drm_display_mode rpi_touchscreen_modes[] = …; static struct rpi_touchscreen *panel_to_ts(struct drm_panel *panel) { … } static int rpi_touchscreen_i2c_read(struct rpi_touchscreen *ts, u8 reg) { … } static void rpi_touchscreen_i2c_write(struct rpi_touchscreen *ts, u8 reg, u8 val) { … } static int rpi_touchscreen_write(struct rpi_touchscreen *ts, u16 reg, u32 val) { … } static int rpi_touchscreen_disable(struct drm_panel *panel) { … } static int rpi_touchscreen_noop(struct drm_panel *panel) { … } static int rpi_touchscreen_prepare(struct drm_panel *panel) { … } static int rpi_touchscreen_enable(struct drm_panel *panel) { … } static int rpi_touchscreen_get_modes(struct drm_panel *panel, struct drm_connector *connector) { … } static const struct drm_panel_funcs rpi_touchscreen_funcs = …; static int rpi_touchscreen_probe(struct i2c_client *i2c) { … } static void rpi_touchscreen_remove(struct i2c_client *i2c) { … } static int rpi_touchscreen_dsi_probe(struct mipi_dsi_device *dsi) { … } static struct mipi_dsi_driver rpi_touchscreen_dsi_driver = …; static const struct of_device_id rpi_touchscreen_of_ids[] = …; MODULE_DEVICE_TABLE(of, rpi_touchscreen_of_ids); static struct i2c_driver rpi_touchscreen_driver = …; static int __init rpi_touchscreen_init(void) { … } module_init(…) …; static void __exit rpi_touchscreen_exit(void) { … } module_exit(rpi_touchscreen_exit); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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