console: copy ns16550 driver from u-boot

BUG=chrome-os-partner:35807
BRANCH=broadcom-firmware
TEST=none

Change-Id: I40623e92f290e5c584a451d99071316b6fc35431
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 505720f734da7a4cdfaff8b2531385644141ba83
Original-Change-Id: I655c7065047971ab05a13e90ab911d7464a37552
Original-Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/251300
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/9764
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>

1 files changed, 301 insertions, 0 deletions

diff --git a/src/soc/broadcom/cygnus/ns16550.c b/src/soc/broadcom/cygnus/ns16550.c
new file mode 100644
index 0000000000..cbb32e0155
--- /dev/null
+++ b/src/soc/broadcom/cygnus/ns16550.c
@@ -0,0 +1,301 @@
+/*
+ * (C) Copyright 2000
+ * Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <linux/compiler.h>
+
+#include <ns16550.h>
+#ifdef CONFIG_NS87308
+#include <ns87308.h>
+#endif
+
+#include <serial.h>
+
+#ifndef CONFIG_NS16550_MIN_FUNCTIONS
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if !defined(CONFIG_CONS_INDEX)
+#elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6)
+#error	"Invalid console index value."
+#endif
+
+#if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
+#error	"Console port 1 defined but not configured."
+#elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
+#error	"Console port 2 defined but not configured."
+#elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
+#error	"Console port 3 defined but not configured."
+#elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
+#error	"Console port 4 defined but not configured."
+#elif CONFIG_CONS_INDEX == 5 && !defined(CONFIG_SYS_NS16550_COM5)
+#error	"Console port 5 defined but not configured."
+#elif CONFIG_CONS_INDEX == 6 && !defined(CONFIG_SYS_NS16550_COM6)
+#error	"Console port 6 defined but not configured."
+#endif
+
+/* Note: The port number specified in the functions is 1 based.
+ *	 the array is 0 based.
+ */
+static NS16550_t serial_ports[6] = {
+#ifdef CONFIG_SYS_NS16550_COM1
+	(NS16550_t)CONFIG_SYS_NS16550_COM1,
+#else
+	NULL,
+#endif
+#ifdef CONFIG_SYS_NS16550_COM2
+	(NS16550_t)CONFIG_SYS_NS16550_COM2,
+#else
+	NULL,
+#endif
+#ifdef CONFIG_SYS_NS16550_COM3
+	(NS16550_t)CONFIG_SYS_NS16550_COM3,
+#else
+	NULL,
+#endif
+#ifdef CONFIG_SYS_NS16550_COM4
+	(NS16550_t)CONFIG_SYS_NS16550_COM4,
+#else
+	NULL,
+#endif
+#ifdef CONFIG_SYS_NS16550_COM5
+	(NS16550_t)CONFIG_SYS_NS16550_COM5,
+#else
+	NULL,
+#endif
+#ifdef CONFIG_SYS_NS16550_COM6
+	(NS16550_t)CONFIG_SYS_NS16550_COM6
+#else
+	NULL
+#endif
+};
+
+#define PORT	serial_ports[port-1]
+
+/* Multi serial device functions */
+#define DECLARE_ESERIAL_FUNCTIONS(port) \
+	static int  eserial##port##_init(void) \
+	{ \
+		int clock_divisor; \
+		clock_divisor = calc_divisor(serial_ports[port-1]); \
+		NS16550_init(serial_ports[port-1], clock_divisor); \
+		return 0 ; \
+	} \
+	static void eserial##port##_setbrg(void) \
+	{ \
+		serial_setbrg_dev(port); \
+	} \
+	static int  eserial##port##_getc(void) \
+	{ \
+		return serial_getc_dev(port); \
+	} \
+	static int  eserial##port##_tstc(void) \
+	{ \
+		return serial_tstc_dev(port); \
+	} \
+	static void eserial##port##_putc(const char c) \
+	{ \
+		serial_putc_dev(port, c); \
+	} \
+	static void eserial##port##_puts(const char *s) \
+	{ \
+		serial_puts_dev(port, s); \
+	}
+
+/* Serial device descriptor */
+#define INIT_ESERIAL_STRUCTURE(port, __name) {	\
+	.name	= __name,			\
+	.start	= eserial##port##_init,		\
+	.stop	= NULL,				\
+	.setbrg	= eserial##port##_setbrg,	\
+	.getc	= eserial##port##_getc,		\
+	.tstc	= eserial##port##_tstc,		\
+	.putc	= eserial##port##_putc,		\
+	.puts	= eserial##port##_puts,		\
+}
+
+int calc_divisor(NS16550_t port)
+{
+#ifdef CONFIG_OMAP1510
+	/* If can't cleanly clock 115200 set div to 1 */
+	if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
+		port->osc_12m_sel = OSC_12M_SEL;	/* enable 6.5 * divisor */
+		return (1);				/* return 1 for base divisor */
+	}
+	port->osc_12m_sel = 0;			/* clear if previsouly set */
+#endif
+#ifdef CONFIG_OMAP1610
+	/* If can't cleanly clock 115200 set div to 1 */
+	if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
+		return (26);		/* return 26 for base divisor */
+	}
+#endif
+
+#define MODE_X_DIV 16
+	/* Compute divisor value. Normally, we should simply return:
+	 *   CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
+	 * but we need to round that value by adding 0.5.
+	 * Rounding is especially important at high baud rates.
+	 */
+	return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
+		(MODE_X_DIV * gd->baudrate);
+}
+
+void
+_serial_putc(const char c,const int port)
+{
+	if (c == '\n')
+		NS16550_putc(PORT, '\r');
+
+	NS16550_putc(PORT, c);
+}
+
+void
+_serial_putc_raw(const char c,const int port)
+{
+	NS16550_putc(PORT, c);
+}
+
+void
+_serial_puts (const char *s,const int port)
+{
+	while (*s) {
+		_serial_putc (*s++,port);
+	}
+}
+
+
+int
+_serial_getc(const int port)
+{
+	return NS16550_getc(PORT);
+}
+
+int
+_serial_tstc(const int port)
+{
+	return NS16550_tstc(PORT);
+}
+
+void
+_serial_setbrg (const int port)
+{
+	int clock_divisor;
+
+	clock_divisor = calc_divisor(PORT);
+	NS16550_reinit(PORT, clock_divisor);
+}
+
+static inline void
+serial_putc_dev(unsigned int dev_index,const char c)
+{
+	_serial_putc(c,dev_index);
+}
+
+static inline void
+serial_putc_raw_dev(unsigned int dev_index,const char c)
+{
+	_serial_putc_raw(c,dev_index);
+}
+
+static inline void
+serial_puts_dev(unsigned int dev_index,const char *s)
+{
+	_serial_puts(s,dev_index);
+}
+
+static inline int
+serial_getc_dev(unsigned int dev_index)
+{
+	return _serial_getc(dev_index);
+}
+
+static inline int
+serial_tstc_dev(unsigned int dev_index)
+{
+	return _serial_tstc(dev_index);
+}
+
+static inline void
+serial_setbrg_dev(unsigned int dev_index)
+{
+	_serial_setbrg(dev_index);
+}
+
+#if defined(CONFIG_SYS_NS16550_COM1)
+DECLARE_ESERIAL_FUNCTIONS(1);
+struct serial_device eserial1_device =
+	INIT_ESERIAL_STRUCTURE(1, "eserial0");
+#endif
+#if defined(CONFIG_SYS_NS16550_COM2)
+DECLARE_ESERIAL_FUNCTIONS(2);
+struct serial_device eserial2_device =
+	INIT_ESERIAL_STRUCTURE(2, "eserial1");
+#endif
+#if defined(CONFIG_SYS_NS16550_COM3)
+DECLARE_ESERIAL_FUNCTIONS(3);
+struct serial_device eserial3_device =
+	INIT_ESERIAL_STRUCTURE(3, "eserial2");
+#endif
+#if defined(CONFIG_SYS_NS16550_COM4)
+DECLARE_ESERIAL_FUNCTIONS(4);
+struct serial_device eserial4_device =
+	INIT_ESERIAL_STRUCTURE(4, "eserial3");
+#endif
+#if defined(CONFIG_SYS_NS16550_COM5)
+DECLARE_ESERIAL_FUNCTIONS(5);
+struct serial_device eserial5_device =
+	INIT_ESERIAL_STRUCTURE(5, "eserial4");
+#endif
+#if defined(CONFIG_SYS_NS16550_COM6)
+DECLARE_ESERIAL_FUNCTIONS(6);
+struct serial_device eserial6_device =
+	INIT_ESERIAL_STRUCTURE(6, "eserial5");
+#endif
+
+__weak struct serial_device *default_serial_console(void)
+{
+#if CONFIG_CONS_INDEX == 1
+	return &eserial1_device;
+#elif CONFIG_CONS_INDEX == 2
+	return &eserial2_device;
+#elif CONFIG_CONS_INDEX == 3
+	return &eserial3_device;
+#elif CONFIG_CONS_INDEX == 4
+	return &eserial4_device;
+#elif CONFIG_CONS_INDEX == 5
+	return &eserial5_device;
+#elif CONFIG_CONS_INDEX == 6
+	return &eserial6_device;
+#else
+#error "Bad CONFIG_CONS_INDEX."
+#endif
+}
+
+void ns16550_serial_initialize(void)
+{
+#if defined(CONFIG_SYS_NS16550_COM1)
+	serial_register(&eserial1_device);
+#endif
+#if defined(CONFIG_SYS_NS16550_COM2)
+	serial_register(&eserial2_device);
+#endif
+#if defined(CONFIG_SYS_NS16550_COM3)
+	serial_register(&eserial3_device);
+#endif
+#if defined(CONFIG_SYS_NS16550_COM4)
+	serial_register(&eserial4_device);
+#endif
+#if defined(CONFIG_SYS_NS16550_COM5)
+	serial_register(&eserial5_device);
+#endif
+#if defined(CONFIG_SYS_NS16550_COM6)
+	serial_register(&eserial6_device);
+#endif
+}
+
+#endif /* !CONFIG_NS16550_MIN_FUNCTIONS */