auxdisplay: Move arm-charlcd.c to drivers/auxdisplay folder

It looks like arm-charlcd.c belongs to auxdisplay subsystem.

Move it to drivers/auxdisplay folder.
No functional changes intended.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 368 deletions

diff --git a/drivers/misc/arm-charlcd.c b/drivers/misc/arm-charlcd.c
deleted file mode 100644
index b3176ee92b90..000000000000
--- a/drivers/misc/arm-charlcd.c
+++ /dev/null
@@ -1,368 +0,0 @@
-/*
- * Driver for the on-board character LCD found on some ARM reference boards
- * This is basically an Hitachi HD44780 LCD with a custom IP block to drive it
- * http://en.wikipedia.org/wiki/HD44780_Character_LCD
- * Currently it will just display the text "ARM Linux" and the linux version
- *
- * License terms: GNU General Public License (GPL) version 2
- * Author: Linus Walleij <triad@df.lth.se>
- */
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/of.h>
-#include <linux/completion.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/workqueue.h>
-#include <generated/utsrelease.h>
-
-#define DRIVERNAME "arm-charlcd"
-#define CHARLCD_TIMEOUT (msecs_to_jiffies(1000))
-
-/* Offsets to registers */
-#define CHAR_COM	0x00U
-#define CHAR_DAT	0x04U
-#define CHAR_RD		0x08U
-#define CHAR_RAW	0x0CU
-#define CHAR_MASK	0x10U
-#define CHAR_STAT	0x14U
-
-#define CHAR_RAW_CLEAR	0x00000000U
-#define CHAR_RAW_VALID	0x00000100U
-
-/* Hitachi HD44780 display commands */
-#define HD_CLEAR			0x01U
-#define HD_HOME				0x02U
-#define HD_ENTRYMODE			0x04U
-#define HD_ENTRYMODE_INCREMENT		0x02U
-#define HD_ENTRYMODE_SHIFT		0x01U
-#define HD_DISPCTRL			0x08U
-#define HD_DISPCTRL_ON			0x04U
-#define HD_DISPCTRL_CURSOR_ON		0x02U
-#define HD_DISPCTRL_CURSOR_BLINK	0x01U
-#define HD_CRSR_SHIFT			0x10U
-#define HD_CRSR_SHIFT_DISPLAY		0x08U
-#define HD_CRSR_SHIFT_DISPLAY_RIGHT	0x04U
-#define HD_FUNCSET			0x20U
-#define HD_FUNCSET_8BIT			0x10U
-#define HD_FUNCSET_2_LINES		0x08U
-#define HD_FUNCSET_FONT_5X10		0x04U
-#define HD_SET_CGRAM			0x40U
-#define HD_SET_DDRAM			0x80U
-#define HD_BUSY_FLAG			0x80U
-
-/**
- * @dev: a pointer back to containing device
- * @phybase: the offset to the controller in physical memory
- * @physize: the size of the physical page
- * @virtbase: the offset to the controller in virtual memory
- * @irq: reserved interrupt number
- * @complete: completion structure for the last LCD command
- */
-struct charlcd {
-	struct device *dev;
-	u32 phybase;
-	u32 physize;
-	void __iomem *virtbase;
-	int irq;
-	struct completion complete;
-	struct delayed_work init_work;
-};
-
-static irqreturn_t charlcd_interrupt(int irq, void *data)
-{
-	struct charlcd *lcd = data;
-	u8 status;
-
-	status = readl(lcd->virtbase + CHAR_STAT) & 0x01;
-	/* Clear IRQ */
-	writel(CHAR_RAW_CLEAR, lcd->virtbase + CHAR_RAW);
-	if (status)
-		complete(&lcd->complete);
-	else
-		dev_info(lcd->dev, "Spurious IRQ (%02x)\n", status);
-	return IRQ_HANDLED;
-}
-
-
-static void charlcd_wait_complete_irq(struct charlcd *lcd)
-{
-	int ret;
-
-	ret = wait_for_completion_interruptible_timeout(&lcd->complete,
-							CHARLCD_TIMEOUT);
-	/* Disable IRQ after completion */
-	writel(0x00, lcd->virtbase + CHAR_MASK);
-
-	if (ret < 0) {
-		dev_err(lcd->dev,
-			"wait_for_completion_interruptible_timeout() "
-			"returned %d waiting for ready\n", ret);
-		return;
-	}
-
-	if (ret == 0) {
-		dev_err(lcd->dev, "charlcd controller timed out "
-			"waiting for ready\n");
-		return;
-	}
-}
-
-static u8 charlcd_4bit_read_char(struct charlcd *lcd)
-{
-	u8 data;
-	u32 val;
-	int i;
-
-	/* If we can, use an IRQ to wait for the data, else poll */
-	if (lcd->irq >= 0)
-		charlcd_wait_complete_irq(lcd);
-	else {
-		i = 0;
-		val = 0;
-		while (!(val & CHAR_RAW_VALID) && i < 10) {
-			udelay(100);
-			val = readl(lcd->virtbase + CHAR_RAW);
-			i++;
-		}
-
-		writel(CHAR_RAW_CLEAR, lcd->virtbase + CHAR_RAW);
-	}
-	msleep(1);
-
-	/* Read the 4 high bits of the data */
-	data = readl(lcd->virtbase + CHAR_RD) & 0xf0;
-
-	/*
-	 * The second read for the low bits does not trigger an IRQ
-	 * so in this case we have to poll for the 4 lower bits
-	 */
-	i = 0;
-	val = 0;
-	while (!(val & CHAR_RAW_VALID) && i < 10) {
-		udelay(100);
-		val = readl(lcd->virtbase + CHAR_RAW);
-		i++;
-	}
-	writel(CHAR_RAW_CLEAR, lcd->virtbase + CHAR_RAW);
-	msleep(1);
-
-	/* Read the 4 low bits of the data */
-	data |= (readl(lcd->virtbase + CHAR_RD) >> 4) & 0x0f;
-
-	return data;
-}
-
-static bool charlcd_4bit_read_bf(struct charlcd *lcd)
-{
-	if (lcd->irq >= 0) {
-		/*
-		 * If we'll use IRQs to wait for the busyflag, clear any
-		 * pending flag and enable IRQ
-		 */
-		writel(CHAR_RAW_CLEAR, lcd->virtbase + CHAR_RAW);
-		init_completion(&lcd->complete);
-		writel(0x01, lcd->virtbase + CHAR_MASK);
-	}
-	readl(lcd->virtbase + CHAR_COM);
-	return charlcd_4bit_read_char(lcd) & HD_BUSY_FLAG ? true : false;
-}
-
-static void charlcd_4bit_wait_busy(struct charlcd *lcd)
-{
-	int retries = 50;
-
-	udelay(100);
-	while (charlcd_4bit_read_bf(lcd) && retries)
-		retries--;
-	if (!retries)
-		dev_err(lcd->dev, "timeout waiting for busyflag\n");
-}
-
-static void charlcd_4bit_command(struct charlcd *lcd, u8 cmd)
-{
-	u32 cmdlo = (cmd << 4) & 0xf0;
-	u32 cmdhi = (cmd & 0xf0);
-
-	writel(cmdhi, lcd->virtbase + CHAR_COM);
-	udelay(10);
-	writel(cmdlo, lcd->virtbase + CHAR_COM);
-	charlcd_4bit_wait_busy(lcd);
-}
-
-static void charlcd_4bit_char(struct charlcd *lcd, u8 ch)
-{
-	u32 chlo = (ch << 4) & 0xf0;
-	u32 chhi = (ch & 0xf0);
-
-	writel(chhi, lcd->virtbase + CHAR_DAT);
-	udelay(10);
-	writel(chlo, lcd->virtbase + CHAR_DAT);
-	charlcd_4bit_wait_busy(lcd);
-}
-
-static void charlcd_4bit_print(struct charlcd *lcd, int line, const char *str)
-{
-	u8 offset;
-	int i;
-
-	/*
-	 * We support line 0, 1
-	 * Line 1 runs from 0x00..0x27
-	 * Line 2 runs from 0x28..0x4f
-	 */
-	if (line == 0)
-		offset = 0;
-	else if (line == 1)
-		offset = 0x28;
-	else
-		return;
-
-	/* Set offset */
-	charlcd_4bit_command(lcd, HD_SET_DDRAM | offset);
-
-	/* Send string */
-	for (i = 0; i < strlen(str) && i < 0x28; i++)
-		charlcd_4bit_char(lcd, str[i]);
-}
-
-static void charlcd_4bit_init(struct charlcd *lcd)
-{
-	/* These commands cannot be checked with the busy flag */
-	writel(HD_FUNCSET | HD_FUNCSET_8BIT, lcd->virtbase + CHAR_COM);
-	msleep(5);
-	writel(HD_FUNCSET | HD_FUNCSET_8BIT, lcd->virtbase + CHAR_COM);
-	udelay(100);
-	writel(HD_FUNCSET | HD_FUNCSET_8BIT, lcd->virtbase + CHAR_COM);
-	udelay(100);
-	/* Go to 4bit mode */
-	writel(HD_FUNCSET, lcd->virtbase + CHAR_COM);
-	udelay(100);
-	/*
-	 * 4bit mode, 2 lines, 5x8 font, after this the number of lines
-	 * and the font cannot be changed until the next initialization sequence
-	 */
-	charlcd_4bit_command(lcd, HD_FUNCSET | HD_FUNCSET_2_LINES);
-	charlcd_4bit_command(lcd, HD_DISPCTRL | HD_DISPCTRL_ON);
-	charlcd_4bit_command(lcd, HD_ENTRYMODE | HD_ENTRYMODE_INCREMENT);
-	charlcd_4bit_command(lcd, HD_CLEAR);
-	charlcd_4bit_command(lcd, HD_HOME);
-	/* Put something useful in the display */
-	charlcd_4bit_print(lcd, 0, "ARM Linux");
-	charlcd_4bit_print(lcd, 1, UTS_RELEASE);
-}
-
-static void charlcd_init_work(struct work_struct *work)
-{
-	struct charlcd *lcd =
-		container_of(work, struct charlcd, init_work.work);
-
-	charlcd_4bit_init(lcd);
-}
-
-static int __init charlcd_probe(struct platform_device *pdev)
-{
-	int ret;
-	struct charlcd *lcd;
-	struct resource *res;
-
-	lcd = kzalloc(sizeof(struct charlcd), GFP_KERNEL);
-	if (!lcd)
-		return -ENOMEM;
-
-	lcd->dev = &pdev->dev;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		ret = -ENOENT;
-		goto out_no_resource;
-	}
-	lcd->phybase = res->start;
-	lcd->physize = resource_size(res);
-
-	if (request_mem_region(lcd->phybase, lcd->physize,
-			       DRIVERNAME) == NULL) {
-		ret = -EBUSY;
-		goto out_no_memregion;
-	}
-
-	lcd->virtbase = ioremap(lcd->phybase, lcd->physize);
-	if (!lcd->virtbase) {
-		ret = -ENOMEM;
-		goto out_no_memregion;
-	}
-
-	lcd->irq = platform_get_irq(pdev, 0);
-	/* If no IRQ is supplied, we'll survive without it */
-	if (lcd->irq >= 0) {
-		if (request_irq(lcd->irq, charlcd_interrupt, 0,
-				DRIVERNAME, lcd)) {
-			ret = -EIO;
-			goto out_no_irq;
-		}
-	}
-
-	platform_set_drvdata(pdev, lcd);
-
-	/*
-	 * Initialize the display in a delayed work, because
-	 * it is VERY slow and would slow down the boot of the system.
-	 */
-	INIT_DELAYED_WORK(&lcd->init_work, charlcd_init_work);
-	schedule_delayed_work(&lcd->init_work, 0);
-
-	dev_info(&pdev->dev, "initialized ARM character LCD at %08x\n",
-		lcd->phybase);
-
-	return 0;
-
-out_no_irq:
-	iounmap(lcd->virtbase);
-out_no_memregion:
-	release_mem_region(lcd->phybase, SZ_4K);
-out_no_resource:
-	kfree(lcd);
-	return ret;
-}
-
-static int charlcd_suspend(struct device *dev)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct charlcd *lcd = platform_get_drvdata(pdev);
-
-	/* Power the display off */
-	charlcd_4bit_command(lcd, HD_DISPCTRL);
-	return 0;
-}
-
-static int charlcd_resume(struct device *dev)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct charlcd *lcd = platform_get_drvdata(pdev);
-
-	/* Turn the display back on */
-	charlcd_4bit_command(lcd, HD_DISPCTRL | HD_DISPCTRL_ON);
-	return 0;
-}
-
-static const struct dev_pm_ops charlcd_pm_ops = {
-	.suspend = charlcd_suspend,
-	.resume = charlcd_resume,
-};
-
-static const struct of_device_id charlcd_match[] = {
-	{ .compatible = "arm,versatile-lcd", },
-	{}
-};
-
-static struct platform_driver charlcd_driver = {
-	.driver = {
-		.name = DRIVERNAME,
-		.pm = &charlcd_pm_ops,
-		.suppress_bind_attrs = true,
-		.of_match_table = of_match_ptr(charlcd_match),
-	},
-};
-builtin_platform_driver_probe(charlcd_driver, charlcd_probe);