[POWERPC] Celleb: setup sio in SCC

This patch setup serial interfaces in SCC to work with serial_txx9
driver.

Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 101 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/celleb/scc_sio.c b/arch/powerpc/platforms/celleb/scc_sio.c
new file mode 100644
index 000000000000..bcd25f54d986
--- /dev/null
+++ b/arch/powerpc/platforms/celleb/scc_sio.c
@@ -0,0 +1,101 @@
+/*
+ * setup serial port in SCC
+ *
+ * (C) Copyright 2006 TOSHIBA CORPORATION
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <linux/tty.h>
+#include <linux/serial.h>
+#include <linux/serial_core.h>
+#include <linux/console.h>
+
+#include <asm/io.h>
+#include <asm/prom.h>
+
+/* sio irq0=0xb00010022 irq0=0xb00010023 irq2=0xb00010024
+    mmio=0xfff000-0x1000,0xff2000-0x1000 */
+static int txx9_serial_bitmap = 0;
+
+static struct {
+        uint32_t offset;
+        uint32_t index;
+} txx9_scc_tab[3] = {
+        { 0x300, 0 },   /* 0xFFF300 */
+        { 0x400, 0 },   /* 0xFFF400 */
+        { 0x800, 1 }    /* 0xFF2800 */
+};
+
+static int txx9_serial_init(void)
+{
+        extern int early_serial_txx9_setup(struct uart_port *port);
+        struct device_node *node;
+        int i;
+        struct uart_port req;
+        struct of_irq irq;
+        struct resource res;
+
+        node = of_find_node_by_path("/ioif1/sio");
+        if (!node)
+                return 0;
+
+        for(i = 0; i < sizeof(txx9_scc_tab)/sizeof(txx9_scc_tab[0]); i++) {
+                if (!(txx9_serial_bitmap & (1<<i)))
+                        continue;
+
+                if (of_irq_map_one(node, i, &irq))
+                        continue;
+                if (of_address_to_resource(node, txx9_scc_tab[i].index, &res))
+                        continue;
+
+                memset(&req, 0, sizeof(req));
+                req.line = i;
+                req.iotype = UPIO_MEM;
+                req.mapbase = res.start + txx9_scc_tab[i].offset;
+#ifdef CONFIG_SERIAL_TXX9_CONSOLE
+                req.membase = ioremap(req.mapbase, 0x24);
+#endif
+                req.irq = irq_create_of_mapping(irq.controller,
+                        irq.specifier, irq.size);
+                req.flags |= UPF_IOREMAP | UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
+                req.uartclk = 83300000;
+                early_serial_txx9_setup(&req);
+        }
+
+        of_node_put(node);
+        return 0;
+}
+
+static int txx9_serial_config(char *ptr)
+{
+        int     i;
+
+        for (;;) {
+                switch(get_option(&ptr, &i)) {
+                default:
+                        return 0;
+                case 2:
+                        txx9_serial_bitmap |= 1 << i;
+                        break;
+                case 1:
+                        txx9_serial_bitmap |= 1 << i;
+                        return 0;
+                }
+        }
+}
+__setup("txx9_serial=", txx9_serial_config);
+
+console_initcall(txx9_serial_init);