[PATCH] 8250: Let arch provide the list of leagacy ports

This patch adds an optional callback for the 8250 driver to request the
list of legacy port via a function call instead of relying on a #define
of an array.

This finally allows to fix the problem of platforms like ppc and ppc64
for which the same kernel can boot machines with and without a 8250, and
is necessary to properly deal with a new platform coming to ppc64 which
has a 8250 but with different irq numbers.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/include/linux/8250.h b/include/linux/8250.h
new file mode 100644
index 000000000000..58bf671b1cde
--- /dev/null
+++ b/include/linux/8250.h
@@ -0,0 +1,75 @@
+/*
+ *  linux/drivers/char/8250.h
+ *
+ *  Driver for 8250/16550-type serial ports
+ *
+ *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
+ *
+ *  Copyright (C) 2001 Russell King.
+ *
+ * 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.
+ *
+ *  $Id: 8250.h,v 1.8 2002/07/21 21:32:30 rmk Exp $
+ */
+
+#include <linux/config.h>
+
+int serial8250_register_port(struct uart_port *);
+void serial8250_unregister_port(int line);
+void serial8250_get_irq_map(unsigned int *map);
+void serial8250_suspend_port(int line);
+void serial8250_resume_port(int line);
+
+struct old_serial_port {
+	unsigned int uart;
+	unsigned int baud_base;
+	unsigned int port;
+	unsigned int irq;
+	unsigned int flags;
+	unsigned char hub6;
+	unsigned char io_type;
+	unsigned char *iomem_base;
+	unsigned short iomem_reg_shift;
+};
+
+/*
+ * This replaces serial_uart_config in include/linux/serial.h
+ */
+struct serial8250_config {
+	const char	*name;
+	unsigned short	fifo_size;
+	unsigned short	tx_loadsz;
+	unsigned char	fcr;
+	unsigned int	flags;
+};
+
+#define UART_CAP_FIFO	(1 << 8)	/* UART has FIFO */
+#define UART_CAP_EFR	(1 << 9)	/* UART has EFR */
+#define UART_CAP_SLEEP	(1 << 10)	/* UART has IER sleep */
+#define UART_CAP_AFE	(1 << 11)	/* MCR-based hw flow control */
+
+#undef SERIAL_DEBUG_PCI
+
+#if defined(__i386__) && (defined(CONFIG_M386) || defined(CONFIG_M486))
+#define SERIAL_INLINE
+#endif
+  
+#ifdef SERIAL_INLINE
+#define _INLINE_ inline
+#else
+#define _INLINE_
+#endif
+
+#define PROBE_RSA	(1 << 0)
+#define PROBE_ANY	(~0)
+
+#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
+
+#ifdef CONFIG_SERIAL_8250_SHARE_IRQ
+#define SERIAL8250_SHARE_IRQS 1
+#else
+#define SERIAL8250_SHARE_IRQS 0
+#endif