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path: root/drivers/video/backlight/cr_bllcd.c
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Diffstat (limited to 'drivers/video/backlight/cr_bllcd.c')
-rw-r--r--drivers/video/backlight/cr_bllcd.c264
1 files changed, 0 insertions, 264 deletions
diff --git a/drivers/video/backlight/cr_bllcd.c b/drivers/video/backlight/cr_bllcd.c
deleted file mode 100644
index 781aeecc451d..000000000000
--- a/drivers/video/backlight/cr_bllcd.c
+++ /dev/null
@@ -1,264 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (c) Intel Corp. 2007.
- * All Rights Reserved.
- *
- * Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
- * develop this driver.
- *
- * This file is part of the Carillo Ranch video subsystem driver.
- *
- * Authors:
- * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
- * Alan Hourihane <alanh-at-tungstengraphics-dot-com>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/mutex.h>
-#include <linux/fb.h>
-#include <linux/backlight.h>
-#include <linux/lcd.h>
-#include <linux/pci.h>
-#include <linux/slab.h>
-
-/* The LVDS- and panel power controls sits on the
- * GPIO port of the ISA bridge.
- */
-
-#define CRVML_DEVICE_LPC 0x27B8
-#define CRVML_REG_GPIOBAR 0x48
-#define CRVML_REG_GPIOEN 0x4C
-#define CRVML_GPIOEN_BIT (1 << 4)
-#define CRVML_PANEL_PORT 0x38
-#define CRVML_LVDS_ON 0x00000001
-#define CRVML_PANEL_ON 0x00000002
-#define CRVML_BACKLIGHT_OFF 0x00000004
-
-/* The PLL Clock register sits on Host bridge */
-#define CRVML_DEVICE_MCH 0x5001
-#define CRVML_REG_MCHBAR 0x44
-#define CRVML_REG_MCHEN 0x54
-#define CRVML_MCHEN_BIT (1 << 28)
-#define CRVML_MCHMAP_SIZE 4096
-#define CRVML_REG_CLOCK 0xc3c
-#define CRVML_CLOCK_SHIFT 8
-#define CRVML_CLOCK_MASK 0x00000f00
-
-static struct pci_dev *lpc_dev;
-static u32 gpio_bar;
-
-struct cr_panel {
- struct backlight_device *cr_backlight_device;
- struct lcd_device *cr_lcd_device;
-};
-
-static int cr_backlight_set_intensity(struct backlight_device *bd)
-{
- u32 addr = gpio_bar + CRVML_PANEL_PORT;
- u32 cur = inl(addr);
-
- if (backlight_get_brightness(bd) == 0) {
- /* OFF */
- cur |= CRVML_BACKLIGHT_OFF;
- outl(cur, addr);
- } else {
- /* FULL ON */
- cur &= ~CRVML_BACKLIGHT_OFF;
- outl(cur, addr);
- }
-
- return 0;
-}
-
-static int cr_backlight_get_intensity(struct backlight_device *bd)
-{
- u32 addr = gpio_bar + CRVML_PANEL_PORT;
- u32 cur = inl(addr);
- u8 intensity;
-
- if (cur & CRVML_BACKLIGHT_OFF)
- intensity = 0;
- else
- intensity = 1;
-
- return intensity;
-}
-
-static const struct backlight_ops cr_backlight_ops = {
- .get_brightness = cr_backlight_get_intensity,
- .update_status = cr_backlight_set_intensity,
-};
-
-static void cr_panel_on(void)
-{
- u32 addr = gpio_bar + CRVML_PANEL_PORT;
- u32 cur = inl(addr);
-
- if (!(cur & CRVML_PANEL_ON)) {
- /* Make sure LVDS controller is down. */
- if (cur & 0x00000001) {
- cur &= ~CRVML_LVDS_ON;
- outl(cur, addr);
- }
- /* Power up Panel */
- schedule_timeout(HZ / 10);
- cur |= CRVML_PANEL_ON;
- outl(cur, addr);
- }
-
- /* Power up LVDS controller */
-
- if (!(cur & CRVML_LVDS_ON)) {
- schedule_timeout(HZ / 10);
- outl(cur | CRVML_LVDS_ON, addr);
- }
-}
-
-static void cr_panel_off(void)
-{
- u32 addr = gpio_bar + CRVML_PANEL_PORT;
- u32 cur = inl(addr);
-
- /* Power down LVDS controller first to avoid high currents */
- if (cur & CRVML_LVDS_ON) {
- cur &= ~CRVML_LVDS_ON;
- outl(cur, addr);
- }
- if (cur & CRVML_PANEL_ON) {
- schedule_timeout(HZ / 10);
- outl(cur & ~CRVML_PANEL_ON, addr);
- }
-}
-
-static int cr_lcd_set_power(struct lcd_device *ld, int power)
-{
- if (power == FB_BLANK_UNBLANK)
- cr_panel_on();
- if (power == FB_BLANK_POWERDOWN)
- cr_panel_off();
-
- return 0;
-}
-
-static struct lcd_ops cr_lcd_ops = {
- .set_power = cr_lcd_set_power,
-};
-
-static int cr_backlight_probe(struct platform_device *pdev)
-{
- struct backlight_properties props;
- struct backlight_device *bdp;
- struct lcd_device *ldp;
- struct cr_panel *crp;
- u8 dev_en;
-
- lpc_dev = pci_get_device(PCI_VENDOR_ID_INTEL,
- CRVML_DEVICE_LPC, NULL);
- if (!lpc_dev) {
- pr_err("INTEL CARILLO RANCH LPC not found.\n");
- return -ENODEV;
- }
-
- pci_read_config_byte(lpc_dev, CRVML_REG_GPIOEN, &dev_en);
- if (!(dev_en & CRVML_GPIOEN_BIT)) {
- pr_err("Carillo Ranch GPIO device was not enabled.\n");
- pci_dev_put(lpc_dev);
- return -ENODEV;
- }
-
- memset(&props, 0, sizeof(struct backlight_properties));
- props.type = BACKLIGHT_RAW;
- bdp = devm_backlight_device_register(&pdev->dev, "cr-backlight",
- &pdev->dev, NULL, &cr_backlight_ops,
- &props);
- if (IS_ERR(bdp)) {
- pci_dev_put(lpc_dev);
- return PTR_ERR(bdp);
- }
-
- ldp = devm_lcd_device_register(&pdev->dev, "cr-lcd", &pdev->dev, NULL,
- &cr_lcd_ops);
- if (IS_ERR(ldp)) {
- pci_dev_put(lpc_dev);
- return PTR_ERR(ldp);
- }
-
- pci_read_config_dword(lpc_dev, CRVML_REG_GPIOBAR,
- &gpio_bar);
- gpio_bar &= ~0x3F;
-
- crp = devm_kzalloc(&pdev->dev, sizeof(*crp), GFP_KERNEL);
- if (!crp) {
- pci_dev_put(lpc_dev);
- return -ENOMEM;
- }
-
- crp->cr_backlight_device = bdp;
- crp->cr_lcd_device = ldp;
- crp->cr_backlight_device->props.power = FB_BLANK_UNBLANK;
- crp->cr_backlight_device->props.brightness = 0;
- cr_backlight_set_intensity(crp->cr_backlight_device);
- cr_lcd_set_power(crp->cr_lcd_device, FB_BLANK_UNBLANK);
-
- platform_set_drvdata(pdev, crp);
-
- return 0;
-}
-
-static void cr_backlight_remove(struct platform_device *pdev)
-{
- struct cr_panel *crp = platform_get_drvdata(pdev);
-
- crp->cr_backlight_device->props.power = FB_BLANK_POWERDOWN;
- crp->cr_backlight_device->props.brightness = 0;
- crp->cr_backlight_device->props.max_brightness = 0;
- cr_backlight_set_intensity(crp->cr_backlight_device);
- cr_lcd_set_power(crp->cr_lcd_device, FB_BLANK_POWERDOWN);
- pci_dev_put(lpc_dev);
-}
-
-static struct platform_driver cr_backlight_driver = {
- .probe = cr_backlight_probe,
- .remove_new = cr_backlight_remove,
- .driver = {
- .name = "cr_backlight",
- },
-};
-
-static struct platform_device *crp;
-
-static int __init cr_backlight_init(void)
-{
- int ret = platform_driver_register(&cr_backlight_driver);
-
- if (ret)
- return ret;
-
- crp = platform_device_register_simple("cr_backlight", -1, NULL, 0);
- if (IS_ERR(crp)) {
- platform_driver_unregister(&cr_backlight_driver);
- return PTR_ERR(crp);
- }
-
- pr_info("Carillo Ranch Backlight Driver Initialized.\n");
-
- return 0;
-}
-
-static void __exit cr_backlight_exit(void)
-{
- platform_device_unregister(crp);
- platform_driver_unregister(&cr_backlight_driver);
-}
-
-module_init(cr_backlight_init);
-module_exit(cr_backlight_exit);
-
-MODULE_AUTHOR("Tungsten Graphics Inc.");
-MODULE_DESCRIPTION("Carillo Ranch Backlight Driver");
-MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2024-05-28 19:23:57 +0000