[SERIAL] [PARISC] add support for GSC serial

Add discovery for PA-RISC 16550 serial ports.

Patch from Matthew Wilcox.

diff --git a/drivers/serial/8250_gsc.c b/drivers/serial/8250_gsc.c
new file mode 100644 (file)
index 0000000..c1077b1
--- /dev/null
+++ b/drivers/serial/8250_gsc.c
@@ -0,0 +1,133 @@
+/*
+ *     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);

diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index a80683909ddc055535f53e00fd7d4e9f11b2e1b2..51f60f2be0cda8126525b41c1949b227659ca8cf 100644 (file)
--- a/drivers/serial/Makefile
+++ b/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