[ARM] S3C24XX: Split serial driver into core and per-cpu drivers

The S3C2410 serial driver in drivers/serial/s3c2410.c has been
growing bigger with the addition of more variants of this hardware
with the growing Samsung SoCs range. As such, it would be
easier to split this code up into a core and per-cpu drivers to
make driver addition easier, and the core smaller.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 106 insertions, 0 deletions

diff --git a/drivers/serial/s3c2400.c b/drivers/serial/s3c2400.c
new file mode 100644
index 000000000000..a1102053e553
--- /dev/null
+++ b/drivers/serial/s3c2400.c
@@ -0,0 +1,106 @@
+/* linux/drivers/serial/s3c240.c
+ *
+ * Driver for Samsung SoC onboard UARTs.
+ *
+ * Ben Dooks, Copyright (c) 2003-2005 Simtec Electronics
+ *      http://armlinux.simtec.co.uk/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+#include <asm/irq.h>
+
+#include <asm/hardware.h>
+
+#include <asm/plat-s3c/regs-serial.h>
+#include <asm/arch/regs-gpio.h>
+
+#include "samsung.h"
+
+static int s3c2400_serial_getsource(struct uart_port *port,
+                                    struct s3c24xx_uart_clksrc *clk)
+{
+        clk->divisor = 1;
+        clk->name = "pclk";
+
+        return 0;
+}
+
+static int s3c2400_serial_setsource(struct uart_port *port,
+                                    struct s3c24xx_uart_clksrc *clk)
+{
+        return 0;
+}
+
+static int s3c2400_serial_resetport(struct uart_port *port,
+                                    struct s3c2410_uartcfg *cfg)
+{
+        dbg("s3c2400_serial_resetport: port=%p (%08lx), cfg=%p\n",
+            port, port->mapbase, cfg);
+
+        wr_regl(port, S3C2410_UCON,  cfg->ucon);
+        wr_regl(port, S3C2410_ULCON, cfg->ulcon);
+
+        /* reset both fifos */
+
+        wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH);
+        wr_regl(port, S3C2410_UFCON, cfg->ufcon);
+
+        return 0;
+}
+
+static struct s3c24xx_uart_info s3c2400_uart_inf = {
+        .name           = "Samsung S3C2400 UART",
+        .type           = PORT_S3C2400,
+        .fifosize       = 16,
+        .rx_fifomask    = S3C2410_UFSTAT_RXMASK,
+        .rx_fifoshift   = S3C2410_UFSTAT_RXSHIFT,
+        .rx_fifofull    = S3C2410_UFSTAT_RXFULL,
+        .tx_fifofull    = S3C2410_UFSTAT_TXFULL,
+        .tx_fifomask    = S3C2410_UFSTAT_TXMASK,
+        .tx_fifoshift   = S3C2410_UFSTAT_TXSHIFT,
+        .get_clksrc     = s3c2400_serial_getsource,
+        .set_clksrc     = s3c2400_serial_setsource,
+        .reset_port     = s3c2400_serial_resetport,
+};
+
+static int s3c2400_serial_probe(struct platform_device *dev)
+{
+        return s3c24xx_serial_probe(dev, &s3c2400_uart_inf);
+}
+
+static struct platform_driver s3c2400_serial_drv = {
+        .probe          = s3c2400_serial_probe,
+        .remove         = s3c24xx_serial_remove,
+        .driver         = {
+                .name   = "s3c2400-uart",
+                .owner  = THIS_MODULE,
+        },
+};
+
+s3c24xx_console_init(&s3c2400_serial_drv, &s3c2400_uart_inf);
+
+static inline int s3c2400_serial_init(void)
+{
+        return s3c24xx_serial_init(&s3c2400_serial_drv, &s3c2400_uart_inf);
+}
+
+static inline void s3c2400_serial_exit(void)
+{
+        platform_driver_unregister(&s3c2400_serial_drv);
+}
+
+module_init(s3c2400_serial_init);
+module_exit(s3c2400_serial_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
+MODULE_DESCRIPTION("Samsung S3C2400 SoC Serial port driver");
+MODULE_ALIAS("platform:s3c2400-uart");