// SPDX-License-Identifier: GPL-2.0-only /* * Freescale i.MX Frame Buffer device driver * * Copyright (C) 2004 Sascha Hauer, Pengutronix * Based on acornfb.c Copyright (C) Russell King. * * Please direct your questions and comments on this driver to the following * email address: * * [email protected] */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/string.h> #include <linux/interrupt.h> #include <linux/slab.h> #include <linux/mm.h> #include <linux/fb.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/ioport.h> #include <linux/cpufreq.h> #include <linux/clk.h> #include <linux/platform_device.h> #include <linux/dma-mapping.h> #include <linux/io.h> #include <linux/lcd.h> #include <linux/math64.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/bitfield.h> #include <linux/regulator/consumer.h> #include <video/of_display_timing.h> #include <video/of_videomode.h> #include <video/videomode.h> struct imx_fb_videomode { … }; /* * Complain if VAR is out of range. */ #define DEBUG_VAR … #define DRIVER_NAME … #define LCDC_SSA … #define LCDC_SIZE … #define SIZE_XMAX_MASK … #define YMAX_MASK_IMX1 … #define YMAX_MASK_IMX21 … #define LCDC_VPW … #define VPW_VPW_MASK … #define LCDC_CPOS … #define CPOS_CC1 … #define CPOS_CC0 … #define CPOS_OP … #define CPOS_CXP_MASK … #define LCDC_LCWHB … #define LCWHB_BK_EN … #define LCWHB_CW_MASK … #define LCWHB_CH_MASK … #define LCWHB_BD_MASK … #define LCDC_LCHCC … #define LCDC_PCR … #define PCR_TFT … #define PCR_COLOR … #define PCR_BPIX_MASK … #define PCR_BPIX_8 … #define PCR_BPIX_12 … #define PCR_BPIX_16 … #define PCR_BPIX_18 … #define PCR_PCD_MASK … #define LCDC_HCR … #define HCR_H_WIDTH_MASK … #define HCR_H_WAIT_1_MASK … #define HCR_H_WAIT_2_MASK … #define LCDC_VCR … #define VCR_V_WIDTH_MASK … #define VCR_V_WAIT_1_MASK … #define VCR_V_WAIT_2_MASK … #define LCDC_POS … #define POS_POS_MASK … #define LCDC_LSCR1 … /* bit fields in imxfb.h */ #define LCDC_PWMR … /* bit fields in imxfb.h */ #define LCDC_DMACR … /* bit fields in imxfb.h */ #define LCDC_RMCR … #define RMCR_LCDC_EN_MX1 … #define RMCR_SELF_REF … #define LCDC_LCDICR … #define LCDICR_INT_SYN … #define LCDICR_INT_CON … #define LCDC_LCDISR … #define LCDISR_UDR_ERR … #define LCDISR_ERR_RES … #define LCDISR_EOF … #define LCDISR_BOF … #define IMXFB_LSCR1_DEFAULT … #define LCDC_LAUSCR … #define LAUSCR_AUS_MODE … /* Used fb-mode. Can be set on kernel command line, therefore file-static. */ static const char *fb_mode; /* * These are the bitfields for each * display depth that we support. */ struct imxfb_rgb { … }; enum imxfb_type { … }; enum imxfb_panel_type { … }; struct imxfb_info { … }; static const struct platform_device_id imxfb_devtype[] = …; MODULE_DEVICE_TABLE(platform, imxfb_devtype); static const struct of_device_id imxfb_of_dev_id[] = …; MODULE_DEVICE_TABLE(of, imxfb_of_dev_id); static inline int is_imx1_fb(struct imxfb_info *fbi) { … } #define IMX_NAME … /* * Minimum X and Y resolutions */ #define MIN_XRES … #define MIN_YRES … /* Actually this really is 18bit support, the lowest 2 bits of each colour * are unused in hardware. We claim to have 24bit support to make software * like X work, which does not support 18bit. */ static struct imxfb_rgb def_rgb_18 = …; static struct imxfb_rgb def_rgb_16_tft = …; static struct imxfb_rgb def_rgb_16_stn = …; static struct imxfb_rgb def_rgb_8 = …; static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info); static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) { … } static int imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue, u_int trans, struct fb_info *info) { … } static int imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, u_int trans, struct fb_info *info) { … } static const struct imx_fb_videomode *imxfb_find_mode(struct imxfb_info *fbi) { … } /* * imxfb_check_var(): * Round up in the following order: bits_per_pixel, xres, * yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale, * bitfields, horizontal timing, vertical timing. */ static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) { … } /* * imxfb_set_par(): * Set the user defined part of the display for the specified console */ static int imxfb_set_par(struct fb_info *info) { … } static int imxfb_enable_controller(struct imxfb_info *fbi) { … } static void imxfb_disable_controller(struct imxfb_info *fbi) { … } static int imxfb_blank(int blank, struct fb_info *info) { … } static const struct fb_ops imxfb_ops = …; /* * imxfb_activate_var(): * Configures LCD Controller based on entries in var parameter. Settings are * only written to the controller if changes were made. */ static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info) { … } static int imxfb_init_fbinfo(struct platform_device *pdev) { … } static int imxfb_of_read_mode(struct device *dev, struct device_node *np, struct imx_fb_videomode *imxfb_mode) { … } static int imxfb_lcd_check_fb(struct lcd_device *lcddev, struct fb_info *fi) { … } static int imxfb_lcd_get_contrast(struct lcd_device *lcddev) { … } static int imxfb_lcd_set_contrast(struct lcd_device *lcddev, int contrast) { … } static int imxfb_lcd_get_power(struct lcd_device *lcddev) { … } static int imxfb_regulator_set(struct imxfb_info *fbi, int enable) { … } static int imxfb_lcd_set_power(struct lcd_device *lcddev, int power) { … } static const struct lcd_ops imxfb_lcd_ops = …; static int imxfb_setup(void) { … } static int imxfb_probe(struct platform_device *pdev) { … } static void imxfb_remove(struct platform_device *pdev) { … } static int imxfb_suspend(struct device *dev) { … } static int imxfb_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(imxfb_pm_ops, imxfb_suspend, imxfb_resume); static struct platform_driver imxfb_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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