[SERIAL] [PARISC] add support for GSC serial

Add discovery for PA-RISC 16550 serial ports.

Patch from Matthew Wilcox.

drivers/serial/8250_gsc.c

+/*
+ *	Serial Device Initialisation for Lasi/Asp/Wax/Dino
+ *
+ *	(c) Copyright Matthew Wilcox <willy@debian.org> 2001-2002
+ *
+ *	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.
+ */
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/serial.h>
+#include <linux/signal.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/serial.h>
+
+static void setup_parisc_serial(struct serial_struct *serial,
+		unsigned long address, int irq, int line)
+{
+	memset(serial, 0, sizeof(struct serial_struct));
+
+	/* autoconfig() sets state->type.  This sets info->type */
+	serial->type = PORT_16550A;
+
+	serial->line = line;
+	serial->iomem_base = ioremap(address, 0x8);
+
+	serial->irq = irq;
+	serial->io_type = SERIAL_IO_MEM;	/* define access method */
+	serial->flags = 0;
+	serial->xmit_fifo_size = 16;
+	serial->custom_divisor = 0;
+	serial->baud_base = LASI_BASE_BAUD;
+}
+
+static int __init 
+serial_init_chip(struct parisc_device *dev)
+{
+	static int serial_line_nr;
+	unsigned long address;
+	int err;
+
+	struct serial_struct *serial;
+
+	if (!dev->irq) {
+		/* We find some unattached serial ports by walking native
+		 * busses.  These should be silently ignored.  Otherwise,
+		 * what we have here is a missing parent device, so tell
+		 * the user what they're missing.
+		 */
+		if (dev->parent->id.hw_type != HPHW_IOA) {
+			printk(KERN_INFO "Serial: device 0x%lx not configured.\n"
+				"Enable support for Wax, Lasi, Asp or Dino.\n", dev->hpa);
+		}
+		return -ENODEV;
+	}
+
+	serial = kmalloc(sizeof(*serial), GFP_KERNEL);
+	if (!serial)
+		return -ENOMEM;
+
+	address = dev->hpa;
+	if (dev->id.sversion != 0x8d) {
+		address += 0x800;
+	}
+
+	setup_parisc_serial(serial, address, dev->irq, serial_line_nr++);
+	err = register_serial(serial);
+	if (err < 0) {
+		printk(KERN_WARNING "register_serial returned error %d\n", err);
+		kfree(serial);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static struct parisc_device_id serial_tbl[] = {
+	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 },
+	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c },
+	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d },
+	{ 0 }
+};
+
+/* Hack.  Dino's serial port will get listed first on some machines.
+ * So we register this driver first which knows about Lasi's serial port.
+ * This needs to get fixed properly somehow.
+ */
+static struct parisc_device_id serial1_tbl[] = {
+	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */
+	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */
+	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */
+	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */
+	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */
+	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */
+	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */
+	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */
+	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */
+	{ 0 }
+};
+
+
+MODULE_DEVICE_TABLE(parisc, serial_tbl);
+
+static struct parisc_driver serial1_driver = {
+	name:		"Serial RS232",
+	id_table:	serial1_tbl,
+	probe:		serial_init_chip,
+};
+
+static struct parisc_driver serial_driver = {
+	name:		"Serial RS232",
+	id_table:	serial_tbl,
+	probe:		serial_init_chip,
+};
+
+int __init probe_serial_gsc(void)
+{
+	register_parisc_driver(&serial1_driver);
+	register_parisc_driver(&serial_driver);
+	return 0;
+}
+
+module_init(probe_serial_gsc);

drivers/serial/Makefile

@@ -7,6 +7,7 @@
 export-objs	:= core.o 8250.o suncore.o
 
 serial-8250-y :=
+serial-8250-$(CONFIG_GSC) += 8250_gsc.o
 serial-8250-$(CONFIG_PCI) += 8250_pci.o
 serial-8250-$(CONFIG_PNP) += 8250_pnp.o
 obj-$(CONFIG_SERIAL_CORE) += core.o