patch-2.3.27 linux/drivers/char/pcmcia/serial_cb.c

• Lines: 151
• Date: Thu Nov 11 16:03:36 1999
• Orig file: v2.3.26/linux/drivers/char/pcmcia/serial_cb.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.26/linux/drivers/char/pcmcia/serial_cb.c linux/drivers/char/pcmcia/serial_cb.c
@@ -0,0 +1,150 @@
+/*======================================================================
+
+    A driver for CardBus serial devices
+
+    serial_cb.c 1.14 1999/11/11 02:18:08
+
+    Copyright 1998, 1999 by Donald Becker and David Hinds
+    
+    This software may be used and distributed according to the terms
+    of the GNU Public License, incorporated herein by reference.
+    All other rights reserved.
+    
+    This driver is an activator for CardBus serial cards, as
+    found on multifunction (e.g. Ethernet and Modem) CardBus cards.
+    
+    Donald Becker may be reached as becker@CESDIS.edu, or C/O
+    USRA Center of Excellence in Space Data and Information Sciences
+    Code 930.5, NASA Goddard Space Flight Center, Greenbelt MD 20771
+    David Hinds may be reached at dhinds@pcmcia.sourceforge.org
+    
+======================================================================*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/malloc.h>
+#include <linux/string.h>
+#include <linux/tty.h>
+#include <linux/serial.h>
+#include <linux/major.h>
+#include <linux/pci.h>
+#include <asm/io.h>
+
+#include <pcmcia/driver_ops.h>
+
+#ifdef PCMCIA_DEBUG
+static int pc_debug = PCMCIA_DEBUG;
+MODULE_PARM(pc_debug, "i");
+#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
+static char *version =
+"serial_cb.c 1.14 1999/11/11 02:18:08 (David Hinds)";
+#else
+#define DEBUG(n, args...)
+#endif
+
+/*======================================================================
+
+    Card-specific configuration hacks
+
+======================================================================*/
+
+static void device_setup(u_char bus, u_char devfn, u_int ioaddr)
+{
+    u_short a, b;
+
+    pcibios_read_config_word(bus, devfn, PCI_SUBSYSTEM_VENDOR_ID, &a);
+    pcibios_read_config_word(bus, devfn, PCI_SUBSYSTEM_ID, &b);
+    if ((a == 0x13a2) && (b == 0x8007)) {
+	/* Ositech Jack of Spades */
+	DEBUG(0, "  83c175 NVCTL_m = 0x%4.4x.\n", inl(ioaddr+0x80));
+	outl(0x4C00, ioaddr + 0x80);
+	outl(0x4C80, ioaddr + 0x80);
+    }
+    DEBUG(0, "  modem registers are %2.2x %2.2x %2.2x "
+	  "%2.2x %2.2x %2.2x %2.2x %2.2x  %2.2x.\n",
+	  inb(ioaddr + 0), inb(ioaddr + 1), inb(ioaddr + 2),
+	  inb(ioaddr + 3), inb(ioaddr + 4), inb(ioaddr + 5),
+	  inb(ioaddr + 6), inb(ioaddr + 7), inb(ioaddr + 8));
+}
+
+/*======================================================================
+
+    serial_attach() creates a serial device "instance" and registers
+    it with the kernel serial driver, and serial_detach() unregisters
+    an instance.
+
+======================================================================*/
+
+static dev_node_t *serial_attach(dev_locator_t *loc)
+{
+    u_int io;
+    u_char bus, devfn, irq;
+    int line;
+    struct serial_struct serial;
+    
+    if (loc->bus != LOC_PCI) return NULL;
+    bus = loc->b.pci.bus; devfn = loc->b.pci.devfn;
+    printk(KERN_INFO "serial_attach(bus %d, fn %d)\n", bus, devfn);
+    pcibios_read_config_dword(bus, devfn, PCI_BASE_ADDRESS_0, &io);
+    pcibios_read_config_byte(bus, devfn, PCI_INTERRUPT_LINE, &irq);
+    if (io & PCI_BASE_ADDRESS_SPACE_IO) {
+	io &= PCI_BASE_ADDRESS_IO_MASK;
+    } else {
+	printk(KERN_NOTICE "serial_cb: PCI base address 0 is not IO\n");
+	return NULL;
+    }
+    device_setup(bus, devfn, io);
+    memset(&serial, 0, sizeof(serial));
+    serial.port = io; serial.irq = irq;
+    serial.flags = ASYNC_SKIP_TEST | ASYNC_SHARE_IRQ;
+
+    /* Some devices seem to need extra time */
+    __set_current_state(TASK_UNINTERRUPTIBLE);
+    schedule_timeout(HZ/50);
+
+    line = register_serial(&serial);
+    if (line < 0) {
+	printk(KERN_NOTICE "serial_cb: register_serial() at 0x%04x, "
+	       "irq %d failed\n", serial.port, serial.irq);
+	return NULL;
+    } else {
+	dev_node_t *node = kmalloc(sizeof(dev_node_t), GFP_KERNEL);
+	sprintf(node->dev_name, "ttyS%d", line);
+	node->major = TTY_MAJOR; node->minor = 0x40 + line;
+	node->next = NULL;
+	MOD_INC_USE_COUNT;
+	return node;
+    }
+}
+
+static void serial_detach(dev_node_t *node)
+{
+    DEBUG(0, "serial_detach(tty%02d)\n", node->minor - 0x40);
+    unregister_serial(node->minor - 0x40);
+    kfree(node);
+    MOD_DEC_USE_COUNT;
+}
+
+/*====================================================================*/
+
+struct driver_operations serial_ops = {
+    "serial_cb", serial_attach, NULL, NULL, serial_detach
+};
+
+static int __init init_serial_cb(void)
+{
+    DEBUG(0, "%s\n", version);
+    register_driver(&serial_ops);
+    return 0;
+}
+
+static void __exit exit_serial_cb(void)
+{
+    DEBUG(0, "serial_cb: unloading\n");
+    unregister_driver(&serial_ops);
+}
+
+module_init(init_serial_cb);
+module_exit(exit_serial_cb);