[MIPS] Add support for BCM47XX CPUs.

Note that the BCM4710 does not support the wait instruction, this
is not a mistake in the code.
    
It originally comes from the OpenWrt patches.
    
Cc: Michael Buesch <mb@bu3sch.de>
Cc: Felix Fietkau <nbd@openwrt.org>
Cc: Florian Schirmer <jolt@tuxbox.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 52 insertions, 0 deletions

diff --git a/arch/mips/bcm47xx/serial.c b/arch/mips/bcm47xx/serial.c
new file mode 100644
index 000000000000..59c11afdb2ab
--- /dev/null
+++ b/arch/mips/bcm47xx/serial.c
@@ -0,0 +1,52 @@
+/*
+ * 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 Aurelien Jarno <aurelien@aurel32.net>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
+#include <linux/ssb/ssb.h>
+#include <bcm47xx.h>
+
+static struct plat_serial8250_port uart8250_data[5];
+
+static struct platform_device uart8250_device = {
+        .name                   = "serial8250",
+        .id                     = PLAT8250_DEV_PLATFORM,
+        .dev                    = {
+                .platform_data  = uart8250_data,
+        },
+};
+
+static int __init uart8250_init(void)
+{
+        int i;
+        struct ssb_mipscore *mcore = &(ssb_bcm47xx.mipscore);
+
+        memset(&uart8250_data, 0,  sizeof(uart8250_data));
+
+        for (i = 0; i < mcore->nr_serial_ports; i++) {
+                struct plat_serial8250_port *p = &(uart8250_data[i]);
+                struct ssb_serial_port *ssb_port = &(mcore->serial_ports[i]);
+
+                p->mapbase = (unsigned int) ssb_port->regs;
+                p->membase = (void *) ssb_port->regs;
+                p->irq = ssb_port->irq + 2;
+                p->uartclk = ssb_port->baud_base;
+                p->regshift = ssb_port->reg_shift;
+                p->iotype = UPIO_MEM;
+                p->flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
+        }
+        return platform_device_register(&uart8250_device);
+}
+
+module_init(uart8250_init);
+
+MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("8250 UART probe driver for the BCM47XX platforms");