s3c24x0: move serial driver to drivers/serial

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 300 insertions, 0 deletions

diff --git a/drivers/serial/serial_s3c24x0.c b/drivers/serial/serial_s3c24x0.c
new file mode 100644
index 0000000..1b1b7a6
--- /dev/null
+++ b/drivers/serial/serial_s3c24x0.c
@@ -0,0 +1,300 @@
+/*
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <common.h>
+#if defined(CONFIG_S3C2400) || defined(CONFIG_TRAB)
+#include <s3c2400.h>
+#elif defined(CONFIG_S3C2410)
+#include <s3c2410.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_SERIAL1
+#define UART_NR	S3C24X0_UART0
+
+#elif defined(CONFIG_SERIAL2)
+# if defined(CONFIG_TRAB)
+#  error "TRAB supports only CONFIG_SERIAL1"
+# endif
+#define UART_NR	S3C24X0_UART1
+
+#elif defined(CONFIG_SERIAL3)
+# if defined(CONFIG_TRAB)
+#  #error "TRAB supports only CONFIG_SERIAL1"
+# endif
+#define UART_NR	S3C24X0_UART2
+
+#else
+#error "Bad: you didn't configure serial ..."
+#endif
+
+#if defined(CONFIG_SERIAL_MULTI)
+#include <serial.h>
+
+/* Multi serial device functions */
+#define DECLARE_S3C_SERIAL_FUNCTIONS(port) \
+    int  s3serial##port##_init (void) {\
+	return serial_init_dev(port);}\
+    void s3serial##port##_setbrg (void) {\
+	serial_setbrg_dev(port);}\
+    int  s3serial##port##_getc (void) {\
+	return serial_getc_dev(port);}\
+    int  s3serial##port##_tstc (void) {\
+	return serial_tstc_dev(port);}\
+    void s3serial##port##_putc (const char c) {\
+	serial_putc_dev(port, c);}\
+    void s3serial##port##_puts (const char *s) {\
+	serial_puts_dev(port, s);}
+
+#define INIT_S3C_SERIAL_STRUCTURE(port,name,bus) {\
+	name,\
+	bus,\
+	s3serial##port##_init,\
+	s3serial##port##_setbrg,\
+	s3serial##port##_getc,\
+	s3serial##port##_tstc,\
+	s3serial##port##_putc,\
+	s3serial##port##_puts, }
+
+#endif /* CONFIG_SERIAL_MULTI */
+
+void _serial_setbrg(const int dev_index)
+{
+	S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
+	unsigned int reg = 0;
+	int i;
+
+	/* value is calculated so : (int)(PCLK/16./baudrate) -1 */
+	reg = get_PCLK() / (16 * gd->baudrate) - 1;
+
+	uart->UBRDIV = reg;
+	for (i = 0; i < 100; i++);
+}
+#if defined(CONFIG_SERIAL_MULTI)
+static inline void
+serial_setbrg_dev(unsigned int dev_index)
+{
+	_serial_setbrg(dev_index);
+}
+#else
+void serial_setbrg(void)
+{
+	_serial_setbrg(UART_NR);
+}
+#endif
+
+
+/* Initialise the serial port. The settings are always 8 data bits, no parity,
+ * 1 stop bit, no start bits.
+ */
+static int serial_init_dev(const int dev_index)
+{
+	S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
+
+	/* FIFO enable, Tx/Rx FIFO clear */
+	uart->UFCON = 0x07;
+	uart->UMCON = 0x0;
+
+	/* Normal,No parity,1 stop,8 bit */
+	uart->ULCON = 0x3;
+	/*
+	 * tx=level,rx=edge,disable timeout int.,enable rx error int.,
+	 * normal,interrupt or polling
+	 */
+	uart->UCON = 0x245;
+
+#ifdef CONFIG_HWFLOW
+	uart->UMCON = 0x1; /* RTS up */
+#endif
+
+	/* FIXME: This is sooooooooooooooooooo ugly */
+#if defined(CONFIG_ARCH_GTA02_v1) || defined(CONFIG_ARCH_GTA02_v2)
+	/* we need auto hw flow control on the gsm and gps port */
+	if (dev_index == 0 || dev_index == 1)
+		uart->UMCON = 0x10;
+#endif
+	_serial_setbrg(dev_index);
+
+	return (0);
+}
+
+#if !defined(CONFIG_SERIAL_MULTI)
+/* Initialise the serial port. The settings are always 8 data bits, no parity,
+ * 1 stop bit, no start bits.
+ */
+int serial_init (void)
+{
+	return serial_init_dev(UART_NR);
+}
+#endif
+
+/*
+ * Read a single byte from the serial port. Returns 1 on success, 0
+ * otherwise. When the function is succesfull, the character read is
+ * written into its argument c.
+ */
+int _serial_getc (const int dev_index)
+{
+	S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
+
+	/* wait for character to arrive */
+	while (!(uart->UTRSTAT & 0x1));
+
+	return uart->URXH & 0xff;
+}
+#if defined(CONFIG_SERIAL_MULTI)
+static inline int serial_getc_dev(unsigned int dev_index)
+{
+	return _serial_getc(dev_index);
+}
+#else
+int serial_getc (void)
+{
+	return _serial_getc(UART_NR);
+}
+#endif
+
+#ifdef CONFIG_HWFLOW
+static int hwflow = 0; /* turned off by default */
+int hwflow_onoff(int on)
+{
+	switch(on) {
+	case 0:
+	default:
+		break; /* return current */
+	case 1:
+		hwflow = 1; /* turn on */
+		break;
+	case -1:
+		hwflow = 0; /* turn off */
+		break;
+	}
+	return hwflow;
+}
+#endif
+
+#ifdef CONFIG_MODEM_SUPPORT
+static int be_quiet = 0;
+void disable_putc(void)
+{
+	be_quiet = 1;
+}
+
+void enable_putc(void)
+{
+	be_quiet = 0;
+}
+#endif
+
+
+/*
+ * Output a single byte to the serial port.
+ */
+void _serial_putc (const char c, const int dev_index)
+{
+	S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
+#ifdef CONFIG_MODEM_SUPPORT
+	if (be_quiet)
+		return;
+#endif
+
+	/* wait for room in the tx FIFO */
+	while (!(uart->UTRSTAT & 0x2));
+
+#ifdef CONFIG_HWFLOW
+	/* Wait for CTS up */
+	while(hwflow && !(uart->UMSTAT & 0x1))
+		;
+#endif
+
+	uart->UTXH = c;
+
+	/* If \n, also do \r */
+	if (c == '\n')
+		serial_putc ('\r');
+}
+#if defined(CONFIG_SERIAL_MULTI)
+static inline void serial_putc_dev(unsigned int dev_index, const char c)
+{
+	_serial_putc(c, dev_index);
+}
+#else
+void serial_putc(const char c)
+{
+	_serial_putc(c, UART_NR);
+}
+#endif
+
+
+/*
+ * Test whether a character is in the RX buffer
+ */
+int _serial_tstc(const int dev_index)
+{
+	S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
+
+	return uart->UTRSTAT & 0x1;
+}
+#if defined(CONFIG_SERIAL_MULTI)
+static inline int
+serial_tstc_dev(unsigned int dev_index)
+{
+	return _serial_tstc(dev_index);
+}
+#else
+int serial_tstc(void)
+{
+	return _serial_tstc(UART_NR);
+}
+#endif
+
+void _serial_puts(const char *s, const int dev_index)
+{
+	while (*s) {
+		_serial_putc (*s++, dev_index);
+	}
+}
+#if defined(CONFIG_SERIAL_MULTI)
+static inline void
+serial_puts_dev(int dev_index, const char *s)
+{
+	_serial_puts(s, dev_index);
+}
+#else
+void
+serial_puts (const char *s)
+{
+	_serial_puts(s, UART_NR);
+}
+#endif
+
+#if defined(CONFIG_SERIAL_MULTI)
+DECLARE_S3C_SERIAL_FUNCTIONS(0);
+struct serial_device s3c24xx_serial0_device =
+	INIT_S3C_SERIAL_STRUCTURE(0, "s3ser0", "S3UART1");
+DECLARE_S3C_SERIAL_FUNCTIONS(1);
+struct serial_device s3c24xx_serial1_device =
+	INIT_S3C_SERIAL_STRUCTURE(1, "s3ser1", "S3UART2");
+DECLARE_S3C_SERIAL_FUNCTIONS(2);
+struct serial_device s3c24xx_serial2_device =
+	INIT_S3C_SERIAL_STRUCTURE(2, "s3ser2", "S3UART3");
+
+#endif /* CONFIG_SERIAL_MULTI */