serial: group all the 8250 related code together

The drivers/tty/serial dir is already getting rather busy.
Relocate the 8250 related drivers to their own subdir to
reduce the clutter.

Note that sunsu.c is not included in this move -- it is
8250-like hardware, but it does not use any of the existing
infrastructure -- and does not depend on SERIAL_8250.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 184 deletions

diff --git a/drivers/tty/serial/8250_dw.c b/drivers/tty/serial/8250_dw.c
deleted file mode 100644
index f574eef3075f..000000000000
--- a/drivers/tty/serial/8250_dw.c
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
- * Synopsys DesignWare 8250 driver.
- *
- * Copyright 2011 Picochip, Jamie Iles.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * The Synopsys DesignWare 8250 has an extra feature whereby it detects if the
- * LCR is written whilst busy.  If it is, then a busy detect interrupt is
- * raised, the LCR needs to be rewritten and the uart status register read.
- */
-#include <linux/device.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/serial_8250.h>
-#include <linux/serial_core.h>
-#include <linux/serial_reg.h>
-#include <linux/of.h>
-#include <linux/of_irq.h>
-#include <linux/of_platform.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-
-struct dw8250_data {
-	int	last_lcr;
-	int	line;
-};
-
-static void dw8250_serial_out(struct uart_port *p, int offset, int value)
-{
-	struct dw8250_data *d = p->private_data;
-
-	if (offset == UART_LCR)
-		d->last_lcr = value;
-
-	offset <<= p->regshift;
-	writeb(value, p->membase + offset);
-}
-
-static unsigned int dw8250_serial_in(struct uart_port *p, int offset)
-{
-	offset <<= p->regshift;
-
-	return readb(p->membase + offset);
-}
-
-static void dw8250_serial_out32(struct uart_port *p, int offset, int value)
-{
-	struct dw8250_data *d = p->private_data;
-
-	if (offset == UART_LCR)
-		d->last_lcr = value;
-
-	offset <<= p->regshift;
-	writel(value, p->membase + offset);
-}
-
-static unsigned int dw8250_serial_in32(struct uart_port *p, int offset)
-{
-	offset <<= p->regshift;
-
-	return readl(p->membase + offset);
-}
-
-/* Offset for the DesignWare's UART Status Register. */
-#define UART_USR	0x1f
-
-static int dw8250_handle_irq(struct uart_port *p)
-{
-	struct dw8250_data *d = p->private_data;
-	unsigned int iir = p->serial_in(p, UART_IIR);
-
-	if (serial8250_handle_irq(p, iir)) {
-		return 1;
-	} else if ((iir & UART_IIR_BUSY) == UART_IIR_BUSY) {
-		/* Clear the USR and write the LCR again. */
-		(void)p->serial_in(p, UART_USR);
-		p->serial_out(p, d->last_lcr, UART_LCR);
-
-		return 1;
-	}
-
-	return 0;
-}
-
-static int __devinit dw8250_probe(struct platform_device *pdev)
-{
-	struct uart_port port = {};
-	struct resource *regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	struct resource *irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	struct device_node *np = pdev->dev.of_node;
-	u32 val;
-	struct dw8250_data *data;
-
-	if (!regs || !irq) {
-		dev_err(&pdev->dev, "no registers/irq defined\n");
-		return -EINVAL;
-	}
-
-	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
-	if (!data)
-		return -ENOMEM;
-	port.private_data = data;
-
-	spin_lock_init(&port.lock);
-	port.mapbase = regs->start;
-	port.irq = irq->start;
-	port.handle_irq = dw8250_handle_irq;
-	port.type = PORT_8250;
-	port.flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP |
-		UPF_FIXED_PORT | UPF_FIXED_TYPE;
-	port.dev = &pdev->dev;
-
-	port.iotype = UPIO_MEM;
-	port.serial_in = dw8250_serial_in;
-	port.serial_out = dw8250_serial_out;
-	if (!of_property_read_u32(np, "reg-io-width", &val)) {
-		switch (val) {
-		case 1:
-			break;
-		case 4:
-			port.iotype = UPIO_MEM32;
-			port.serial_in = dw8250_serial_in32;
-			port.serial_out = dw8250_serial_out32;
-			break;
-		default:
-			dev_err(&pdev->dev, "unsupported reg-io-width (%u)\n",
-				val);
-			return -EINVAL;
-		}
-	}
-
-	if (!of_property_read_u32(np, "reg-shift", &val))
-		port.regshift = val;
-
-	if (of_property_read_u32(np, "clock-frequency", &val)) {
-		dev_err(&pdev->dev, "no clock-frequency property set\n");
-		return -EINVAL;
-	}
-	port.uartclk = val;
-
-	data->line = serial8250_register_port(&port);
-	if (data->line < 0)
-		return data->line;
-
-	platform_set_drvdata(pdev, data);
-
-	return 0;
-}
-
-static int __devexit dw8250_remove(struct platform_device *pdev)
-{
-	struct dw8250_data *data = platform_get_drvdata(pdev);
-
-	serial8250_unregister_port(data->line);
-
-	return 0;
-}
-
-static const struct of_device_id dw8250_match[] = {
-	{ .compatible = "snps,dw-apb-uart" },
-	{ /* Sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, dw8250_match);
-
-static struct platform_driver dw8250_platform_driver = {
-	.driver = {
-		.name		= "dw-apb-uart",
-		.owner		= THIS_MODULE,
-		.of_match_table	= dw8250_match,
-	},
-	.probe			= dw8250_probe,
-	.remove			= __devexit_p(dw8250_remove),
-};
-
-module_platform_driver(dw8250_platform_driver);
-
-MODULE_AUTHOR("Jamie Iles");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Synopsys DesignWare 8250 serial port driver");