// SPDX-License-Identifier: GPL-2.0-only /* * Versatile family (ARM reference designs) handling for the PL11x. * This is based on code and know-how in the previous frame buffer * driver in drivers/video/fbdev/amba-clcd.c: * Copyright (C) 2001 ARM Limited, by David A Rusling * Updated to 2.5 by Deep Blue Solutions Ltd. * Major contributions and discoveries by Russell King. */ #include <linux/bitops.h> #include <linux/device.h> #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/vexpress.h> #include <drm/drm_fourcc.h> #include "pl111_versatile.h" #include "pl111_drm.h" static struct regmap *versatile_syscon_map; /* * We detect the different syscon types from the compatible strings. */ enum versatile_clcd { … }; static const struct of_device_id versatile_clcd_of_match[] = …; static const struct of_device_id impd1_clcd_of_match[] = …; /* * Core module CLCD control on the Integrator/CP, bits * 8 thru 19 of the CM_CONTROL register controls a bunch * of CLCD settings. */ #define INTEGRATOR_HDR_CTRL_OFFSET … #define INTEGRATOR_CLCD_LCDBIASEN … #define INTEGRATOR_CLCD_LCDBIASUP … #define INTEGRATOR_CLCD_LCDBIASDN … /* Bits 11,12,13 controls the LCD or VGA bridge type */ #define INTEGRATOR_CLCD_LCDMUX_LCD24 … #define INTEGRATOR_CLCD_LCDMUX_SHARP … #define INTEGRATOR_CLCD_LCDMUX_VGA555 … #define INTEGRATOR_CLCD_LCDMUX_VGA24 … #define INTEGRATOR_CLCD_LCD0_EN … #define INTEGRATOR_CLCD_LCD1_EN … /* R/L flip on Sharp */ #define INTEGRATOR_CLCD_LCD_STATIC1 … /* U/D flip on Sharp */ #define INTEGRATOR_CLCD_LCD_STATIC2 … /* No connection on Sharp */ #define INTEGRATOR_CLCD_LCD_STATIC … /* 0 = 24bit VGA, 1 = 18bit VGA */ #define INTEGRATOR_CLCD_LCD_N24BITEN … #define INTEGRATOR_CLCD_MASK … static void pl111_integrator_enable(struct drm_device *drm, u32 format) { … } #define IMPD1_CTRL_OFFSET … #define IMPD1_CTRL_DISP_LCD … #define IMPD1_CTRL_DISP_VGA … #define IMPD1_CTRL_DISP_LCD1 … #define IMPD1_CTRL_DISP_ENABLE … #define IMPD1_CTRL_DISP_MASK … static void pl111_impd1_enable(struct drm_device *drm, u32 format) { … } static void pl111_impd1_disable(struct drm_device *drm) { … } /* * This configuration register in the Versatile and RealView * family is uniformly present but appears more and more * unutilized starting with the RealView series. */ #define SYS_CLCD … #define SYS_CLCD_MODE_MASK … #define SYS_CLCD_MODE_888 … #define SYS_CLCD_MODE_5551 … #define SYS_CLCD_MODE_565_R_LSB … #define SYS_CLCD_MODE_565_B_LSB … #define SYS_CLCD_CONNECTOR_MASK … #define SYS_CLCD_NLCDIOON … #define SYS_CLCD_VDDPOSSWITCH … #define SYS_CLCD_PWR3V5SWITCH … #define SYS_CLCD_VDDNEGSWITCH … static void pl111_versatile_disable(struct drm_device *drm) { … } static void pl111_versatile_enable(struct drm_device *drm, u32 format) { … } static void pl111_realview_clcd_disable(struct drm_device *drm) { … } static void pl111_realview_clcd_enable(struct drm_device *drm, u32 format) { … } /* PL110 pixel formats for Integrator, vanilla PL110 */ static const u32 pl110_integrator_pixel_formats[] = …; /* Extended PL110 pixel formats for Integrator and Versatile */ static const u32 pl110_versatile_pixel_formats[] = …; static const u32 pl111_realview_pixel_formats[] = …; /* * The Integrator variant is a PL110 with a bunch of broken, or not * yet implemented features */ static const struct pl111_variant_data pl110_integrator = …; /* * The IM-PD1 variant is a PL110 with a bunch of broken, or not * yet implemented features */ static const struct pl111_variant_data pl110_impd1 = …; /* * This is the in-between PL110 variant found in the ARM Versatile, * supporting RGB565/BGR565 */ static const struct pl111_variant_data pl110_versatile = …; /* * RealView PL111 variant, the only real difference from the vanilla * PL111 is that we select 16bpp framebuffer by default to be able * to get 1024x768 without saturating the memory bus. */ static const struct pl111_variant_data pl111_realview = …; /* * Versatile Express PL111 variant, again we just push the maximum * BPP to 16 to be able to get 1024x768 without saturating the memory * bus. The clockdivider also seems broken on the Versatile Express. */ static const struct pl111_variant_data pl111_vexpress = …; #define VEXPRESS_FPGAMUX_MOTHERBOARD … #define VEXPRESS_FPGAMUX_DAUGHTERBOARD_1 … #define VEXPRESS_FPGAMUX_DAUGHTERBOARD_2 … static int pl111_vexpress_clcd_init(struct device *dev, struct device_node *np, struct pl111_drm_dev_private *priv) { … } int pl111_versatile_init(struct device *dev, struct pl111_drm_dev_private *priv) { … } EXPORT_SYMBOL_GPL(…);
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