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Diffstat (limited to 'arch/mips/jazz/jazz-platform.c')
-rw-r--r--arch/mips/jazz/jazz-platform.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/mips/jazz/jazz-platform.c b/arch/mips/jazz/jazz-platform.c
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index 000000000000..fd736703eef2
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+++ b/arch/mips/jazz/jazz-platform.c
@@ -0,0 +1,60 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/serial_8250.h>
+
+#include <asm/jazz.h>
+
+/*
+ * Confusion ... It seems the original Microsoft Jazz machine used to have a
+ * 4.096MHz clock for its UART while the MIPS Magnum and Millenium systems
+ * had 8MHz. The Olivetti M700-10 and the Acer PICA have 1.8432MHz like PCs.
+ */
+#ifdef CONFIG_OLIVETTI_M700
+#define JAZZ_BASE_BAUD 1843200
+#else
+#define JAZZ_BASE_BAUD 8000000 /* 3072000 */
+#endif
+
+#define JAZZ_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
+
+#define JAZZ_PORT(base, int) \
+{ \
+ .mapbase = base, \
+ .irq = int, \
+ .uartclk = JAZZ_BASE_BAUD, \
+ .iotype = UPIO_MEM, \
+ .flags = JAZZ_UART_FLAGS, \
+ .regshift = 0, \
+}
+
+static struct plat_serial8250_port uart8250_data[] = {
+ JAZZ_PORT(JAZZ_SERIAL1_BASE, JAZZ_SERIAL1_IRQ),
+ JAZZ_PORT(JAZZ_SERIAL2_BASE, JAZZ_SERIAL2_IRQ),
+ { },
+};
+
+static struct platform_device uart8250_device = {
+ .name = "serial8250",
+ .id = PLAT8250_DEV_PLATFORM,
+ .dev = {
+ .platform_data = uart8250_data,
+ },
+};
+
+static int __init uart8250_init(void)
+{
+ return platform_device_register(&uart8250_device);
+}
+
+module_init(uart8250_init);
+
+MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("8250 UART probe driver for the Jazz family");