410 lines
11 KiB
C
410 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
#include <linux/amba/clcd-regs.h>
|
|
#include <linux/device.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/mfd/syscon.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/module.h>
|
|
#include <drm/drmP.h>
|
|
#include "pl111_versatile.h"
|
|
#include "pl111_vexpress.h"
|
|
#include "pl111_drm.h"
|
|
|
|
static struct regmap *versatile_syscon_map;
|
|
|
|
/*
|
|
* We detect the different syscon types from the compatible strings.
|
|
*/
|
|
enum versatile_clcd {
|
|
INTEGRATOR_CLCD_CM,
|
|
VERSATILE_CLCD,
|
|
REALVIEW_CLCD_EB,
|
|
REALVIEW_CLCD_PB1176,
|
|
REALVIEW_CLCD_PB11MP,
|
|
REALVIEW_CLCD_PBA8,
|
|
REALVIEW_CLCD_PBX,
|
|
VEXPRESS_CLCD_V2M,
|
|
};
|
|
|
|
static const struct of_device_id versatile_clcd_of_match[] = {
|
|
{
|
|
.compatible = "arm,core-module-integrator",
|
|
.data = (void *)INTEGRATOR_CLCD_CM,
|
|
},
|
|
{
|
|
.compatible = "arm,versatile-sysreg",
|
|
.data = (void *)VERSATILE_CLCD,
|
|
},
|
|
{
|
|
.compatible = "arm,realview-eb-syscon",
|
|
.data = (void *)REALVIEW_CLCD_EB,
|
|
},
|
|
{
|
|
.compatible = "arm,realview-pb1176-syscon",
|
|
.data = (void *)REALVIEW_CLCD_PB1176,
|
|
},
|
|
{
|
|
.compatible = "arm,realview-pb11mp-syscon",
|
|
.data = (void *)REALVIEW_CLCD_PB11MP,
|
|
},
|
|
{
|
|
.compatible = "arm,realview-pba8-syscon",
|
|
.data = (void *)REALVIEW_CLCD_PBA8,
|
|
},
|
|
{
|
|
.compatible = "arm,realview-pbx-syscon",
|
|
.data = (void *)REALVIEW_CLCD_PBX,
|
|
},
|
|
{
|
|
.compatible = "arm,vexpress-muxfpga",
|
|
.data = (void *)VEXPRESS_CLCD_V2M,
|
|
},
|
|
{},
|
|
};
|
|
|
|
/*
|
|
* 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 0x0C
|
|
#define INTEGRATOR_CLCD_LCDBIASEN BIT(8)
|
|
#define INTEGRATOR_CLCD_LCDBIASUP BIT(9)
|
|
#define INTEGRATOR_CLCD_LCDBIASDN BIT(10)
|
|
/* Bits 11,12,13 controls the LCD or VGA bridge type */
|
|
#define INTEGRATOR_CLCD_LCDMUX_LCD24 BIT(11)
|
|
#define INTEGRATOR_CLCD_LCDMUX_SHARP (BIT(11)|BIT(12))
|
|
#define INTEGRATOR_CLCD_LCDMUX_VGA555 BIT(13)
|
|
#define INTEGRATOR_CLCD_LCDMUX_VGA24 (BIT(11)|BIT(12)|BIT(13))
|
|
#define INTEGRATOR_CLCD_LCD0_EN BIT(14)
|
|
#define INTEGRATOR_CLCD_LCD1_EN BIT(15)
|
|
/* R/L flip on Sharp */
|
|
#define INTEGRATOR_CLCD_LCD_STATIC1 BIT(16)
|
|
/* U/D flip on Sharp */
|
|
#define INTEGRATOR_CLCD_LCD_STATIC2 BIT(17)
|
|
/* No connection on Sharp */
|
|
#define INTEGRATOR_CLCD_LCD_STATIC BIT(18)
|
|
/* 0 = 24bit VGA, 1 = 18bit VGA */
|
|
#define INTEGRATOR_CLCD_LCD_N24BITEN BIT(19)
|
|
|
|
#define INTEGRATOR_CLCD_MASK GENMASK(19, 8)
|
|
|
|
static void pl111_integrator_enable(struct drm_device *drm, u32 format)
|
|
{
|
|
u32 val;
|
|
|
|
dev_info(drm->dev, "enable Integrator CLCD connectors\n");
|
|
|
|
/* FIXME: really needed? */
|
|
val = INTEGRATOR_CLCD_LCD_STATIC1 | INTEGRATOR_CLCD_LCD_STATIC2 |
|
|
INTEGRATOR_CLCD_LCD0_EN | INTEGRATOR_CLCD_LCD1_EN;
|
|
|
|
switch (format) {
|
|
case DRM_FORMAT_XBGR8888:
|
|
case DRM_FORMAT_XRGB8888:
|
|
/* 24bit formats */
|
|
val |= INTEGRATOR_CLCD_LCDMUX_VGA24;
|
|
break;
|
|
case DRM_FORMAT_XBGR1555:
|
|
case DRM_FORMAT_XRGB1555:
|
|
/* Pseudocolor, RGB555, BGR555 */
|
|
val |= INTEGRATOR_CLCD_LCDMUX_VGA555;
|
|
break;
|
|
default:
|
|
dev_err(drm->dev, "unhandled format on Integrator 0x%08x\n",
|
|
format);
|
|
break;
|
|
}
|
|
|
|
regmap_update_bits(versatile_syscon_map,
|
|
INTEGRATOR_HDR_CTRL_OFFSET,
|
|
INTEGRATOR_CLCD_MASK,
|
|
val);
|
|
}
|
|
|
|
/*
|
|
* 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 0x50
|
|
#define SYS_CLCD_MODE_MASK (BIT(0)|BIT(1))
|
|
#define SYS_CLCD_MODE_888 0
|
|
#define SYS_CLCD_MODE_5551 BIT(0)
|
|
#define SYS_CLCD_MODE_565_R_LSB BIT(1)
|
|
#define SYS_CLCD_MODE_565_B_LSB (BIT(0)|BIT(1))
|
|
#define SYS_CLCD_CONNECTOR_MASK (BIT(2)|BIT(3)|BIT(4)|BIT(5))
|
|
#define SYS_CLCD_NLCDIOON BIT(2)
|
|
#define SYS_CLCD_VDDPOSSWITCH BIT(3)
|
|
#define SYS_CLCD_PWR3V5SWITCH BIT(4)
|
|
#define SYS_CLCD_VDDNEGSWITCH BIT(5)
|
|
|
|
static void pl111_versatile_disable(struct drm_device *drm)
|
|
{
|
|
dev_info(drm->dev, "disable Versatile CLCD connectors\n");
|
|
regmap_update_bits(versatile_syscon_map,
|
|
SYS_CLCD,
|
|
SYS_CLCD_CONNECTOR_MASK,
|
|
0);
|
|
}
|
|
|
|
static void pl111_versatile_enable(struct drm_device *drm, u32 format)
|
|
{
|
|
u32 val = 0;
|
|
|
|
dev_info(drm->dev, "enable Versatile CLCD connectors\n");
|
|
|
|
switch (format) {
|
|
case DRM_FORMAT_ABGR8888:
|
|
case DRM_FORMAT_XBGR8888:
|
|
case DRM_FORMAT_ARGB8888:
|
|
case DRM_FORMAT_XRGB8888:
|
|
val |= SYS_CLCD_MODE_888;
|
|
break;
|
|
case DRM_FORMAT_BGR565:
|
|
val |= SYS_CLCD_MODE_565_R_LSB;
|
|
break;
|
|
case DRM_FORMAT_RGB565:
|
|
val |= SYS_CLCD_MODE_565_B_LSB;
|
|
break;
|
|
case DRM_FORMAT_ABGR1555:
|
|
case DRM_FORMAT_XBGR1555:
|
|
case DRM_FORMAT_ARGB1555:
|
|
case DRM_FORMAT_XRGB1555:
|
|
val |= SYS_CLCD_MODE_5551;
|
|
break;
|
|
default:
|
|
dev_err(drm->dev, "unhandled format on Versatile 0x%08x\n",
|
|
format);
|
|
break;
|
|
}
|
|
|
|
/* Set up the MUX */
|
|
regmap_update_bits(versatile_syscon_map,
|
|
SYS_CLCD,
|
|
SYS_CLCD_MODE_MASK,
|
|
val);
|
|
|
|
/* Then enable the display */
|
|
regmap_update_bits(versatile_syscon_map,
|
|
SYS_CLCD,
|
|
SYS_CLCD_CONNECTOR_MASK,
|
|
SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH);
|
|
}
|
|
|
|
static void pl111_realview_clcd_disable(struct drm_device *drm)
|
|
{
|
|
dev_info(drm->dev, "disable RealView CLCD connectors\n");
|
|
regmap_update_bits(versatile_syscon_map,
|
|
SYS_CLCD,
|
|
SYS_CLCD_CONNECTOR_MASK,
|
|
0);
|
|
}
|
|
|
|
static void pl111_realview_clcd_enable(struct drm_device *drm, u32 format)
|
|
{
|
|
dev_info(drm->dev, "enable RealView CLCD connectors\n");
|
|
regmap_update_bits(versatile_syscon_map,
|
|
SYS_CLCD,
|
|
SYS_CLCD_CONNECTOR_MASK,
|
|
SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH);
|
|
}
|
|
|
|
/* PL110 pixel formats for Integrator, vanilla PL110 */
|
|
static const u32 pl110_integrator_pixel_formats[] = {
|
|
DRM_FORMAT_ABGR8888,
|
|
DRM_FORMAT_XBGR8888,
|
|
DRM_FORMAT_ARGB8888,
|
|
DRM_FORMAT_XRGB8888,
|
|
DRM_FORMAT_ABGR1555,
|
|
DRM_FORMAT_XBGR1555,
|
|
DRM_FORMAT_ARGB1555,
|
|
DRM_FORMAT_XRGB1555,
|
|
};
|
|
|
|
/* Extended PL110 pixel formats for Integrator and Versatile */
|
|
static const u32 pl110_versatile_pixel_formats[] = {
|
|
DRM_FORMAT_ABGR8888,
|
|
DRM_FORMAT_XBGR8888,
|
|
DRM_FORMAT_ARGB8888,
|
|
DRM_FORMAT_XRGB8888,
|
|
DRM_FORMAT_BGR565, /* Uses external PLD */
|
|
DRM_FORMAT_RGB565, /* Uses external PLD */
|
|
DRM_FORMAT_ABGR1555,
|
|
DRM_FORMAT_XBGR1555,
|
|
DRM_FORMAT_ARGB1555,
|
|
DRM_FORMAT_XRGB1555,
|
|
};
|
|
|
|
static const u32 pl111_realview_pixel_formats[] = {
|
|
DRM_FORMAT_ABGR8888,
|
|
DRM_FORMAT_XBGR8888,
|
|
DRM_FORMAT_ARGB8888,
|
|
DRM_FORMAT_XRGB8888,
|
|
DRM_FORMAT_BGR565,
|
|
DRM_FORMAT_RGB565,
|
|
DRM_FORMAT_ABGR1555,
|
|
DRM_FORMAT_XBGR1555,
|
|
DRM_FORMAT_ARGB1555,
|
|
DRM_FORMAT_XRGB1555,
|
|
DRM_FORMAT_ABGR4444,
|
|
DRM_FORMAT_XBGR4444,
|
|
DRM_FORMAT_ARGB4444,
|
|
DRM_FORMAT_XRGB4444,
|
|
};
|
|
|
|
/*
|
|
* The Integrator variant is a PL110 with a bunch of broken, or not
|
|
* yet implemented features
|
|
*/
|
|
static const struct pl111_variant_data pl110_integrator = {
|
|
.name = "PL110 Integrator",
|
|
.is_pl110 = true,
|
|
.broken_clockdivider = true,
|
|
.broken_vblank = true,
|
|
.formats = pl110_integrator_pixel_formats,
|
|
.nformats = ARRAY_SIZE(pl110_integrator_pixel_formats),
|
|
.fb_bpp = 16,
|
|
};
|
|
|
|
/*
|
|
* This is the in-between PL110 variant found in the ARM Versatile,
|
|
* supporting RGB565/BGR565
|
|
*/
|
|
static const struct pl111_variant_data pl110_versatile = {
|
|
.name = "PL110 Versatile",
|
|
.is_pl110 = true,
|
|
.external_bgr = true,
|
|
.formats = pl110_versatile_pixel_formats,
|
|
.nformats = ARRAY_SIZE(pl110_versatile_pixel_formats),
|
|
.fb_bpp = 16,
|
|
};
|
|
|
|
/*
|
|
* 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 = {
|
|
.name = "PL111 RealView",
|
|
.formats = pl111_realview_pixel_formats,
|
|
.nformats = ARRAY_SIZE(pl111_realview_pixel_formats),
|
|
.fb_bpp = 16,
|
|
};
|
|
|
|
/*
|
|
* 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 = {
|
|
.name = "PL111 Versatile Express",
|
|
.formats = pl111_realview_pixel_formats,
|
|
.nformats = ARRAY_SIZE(pl111_realview_pixel_formats),
|
|
.fb_bpp = 16,
|
|
.broken_clockdivider = true,
|
|
};
|
|
|
|
int pl111_versatile_init(struct device *dev, struct pl111_drm_dev_private *priv)
|
|
{
|
|
const struct of_device_id *clcd_id;
|
|
enum versatile_clcd versatile_clcd_type;
|
|
struct device_node *np;
|
|
struct regmap *map;
|
|
int ret;
|
|
|
|
np = of_find_matching_node_and_match(NULL, versatile_clcd_of_match,
|
|
&clcd_id);
|
|
if (!np) {
|
|
/* Non-ARM reference designs, just bail out */
|
|
return 0;
|
|
}
|
|
versatile_clcd_type = (enum versatile_clcd)clcd_id->data;
|
|
|
|
/* Versatile Express special handling */
|
|
if (versatile_clcd_type == VEXPRESS_CLCD_V2M) {
|
|
struct platform_device *pdev;
|
|
|
|
/* Registers a driver for the muxfpga */
|
|
ret = vexpress_muxfpga_init();
|
|
if (ret) {
|
|
dev_err(dev, "unable to initialize muxfpga driver\n");
|
|
of_node_put(np);
|
|
return ret;
|
|
}
|
|
|
|
/* Call into deep Vexpress configuration API */
|
|
pdev = of_find_device_by_node(np);
|
|
if (!pdev) {
|
|
dev_err(dev, "can't find the sysreg device, deferring\n");
|
|
of_node_put(np);
|
|
return -EPROBE_DEFER;
|
|
}
|
|
map = dev_get_drvdata(&pdev->dev);
|
|
if (!map) {
|
|
dev_err(dev, "sysreg has not yet probed\n");
|
|
platform_device_put(pdev);
|
|
of_node_put(np);
|
|
return -EPROBE_DEFER;
|
|
}
|
|
} else {
|
|
map = syscon_node_to_regmap(np);
|
|
}
|
|
of_node_put(np);
|
|
|
|
if (IS_ERR(map)) {
|
|
dev_err(dev, "no Versatile syscon regmap\n");
|
|
return PTR_ERR(map);
|
|
}
|
|
|
|
switch (versatile_clcd_type) {
|
|
case INTEGRATOR_CLCD_CM:
|
|
versatile_syscon_map = map;
|
|
priv->variant = &pl110_integrator;
|
|
priv->variant_display_enable = pl111_integrator_enable;
|
|
dev_info(dev, "set up callbacks for Integrator PL110\n");
|
|
break;
|
|
case VERSATILE_CLCD:
|
|
versatile_syscon_map = map;
|
|
/* This can do RGB565 with external PLD */
|
|
priv->variant = &pl110_versatile;
|
|
priv->variant_display_enable = pl111_versatile_enable;
|
|
priv->variant_display_disable = pl111_versatile_disable;
|
|
/*
|
|
* The Versatile has a variant halfway between PL110
|
|
* and PL111 where these two registers have already been
|
|
* swapped.
|
|
*/
|
|
priv->ienb = CLCD_PL111_IENB;
|
|
priv->ctrl = CLCD_PL111_CNTL;
|
|
dev_info(dev, "set up callbacks for Versatile PL110\n");
|
|
break;
|
|
case REALVIEW_CLCD_EB:
|
|
case REALVIEW_CLCD_PB1176:
|
|
case REALVIEW_CLCD_PB11MP:
|
|
case REALVIEW_CLCD_PBA8:
|
|
case REALVIEW_CLCD_PBX:
|
|
versatile_syscon_map = map;
|
|
priv->variant = &pl111_realview;
|
|
priv->variant_display_enable = pl111_realview_clcd_enable;
|
|
priv->variant_display_disable = pl111_realview_clcd_disable;
|
|
dev_info(dev, "set up callbacks for RealView PL111\n");
|
|
break;
|
|
case VEXPRESS_CLCD_V2M:
|
|
priv->variant = &pl111_vexpress;
|
|
dev_info(dev, "initializing Versatile Express PL111\n");
|
|
ret = pl111_vexpress_clcd_init(dev, priv, map);
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
default:
|
|
dev_info(dev, "unknown Versatile system controller\n");
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pl111_versatile_init);
|