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path: root/drivers/net/pcmcia/ibmtr_cs.c
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Diffstat (limited to 'drivers/net/pcmcia/ibmtr_cs.c')
-rw-r--r--drivers/net/pcmcia/ibmtr_cs.c535
1 files changed, 535 insertions, 0 deletions
diff --git a/drivers/net/pcmcia/ibmtr_cs.c b/drivers/net/pcmcia/ibmtr_cs.c
new file mode 100644
index 00000000000..3107ccfe8f3
--- /dev/null
+++ b/drivers/net/pcmcia/ibmtr_cs.c
@@ -0,0 +1,535 @@
+/*======================================================================
+
+ A PCMCIA token-ring driver for IBM-based cards
+
+ This driver supports the IBM PCMCIA Token-Ring Card.
+ Written by Steve Kipisz, kipisz@vnet.ibm.com or
+ bungy@ibm.net
+
+ Written 1995,1996.
+
+ This code is based on pcnet_cs.c from David Hinds.
+
+ V2.2.0 February 1999 - Mike Phillips phillim@amtrak.com
+
+ Linux V2.2.x presented significant changes to the underlying
+ ibmtr.c code. Mainly the code became a lot more organized and
+ modular.
+
+ This caused the old PCMCIA Token Ring driver to give up and go
+ home early. Instead of just patching the old code to make it
+ work, the PCMCIA code has been streamlined, updated and possibly
+ improved.
+
+ This code now only contains code required for the Card Services.
+ All we do here is set the card up enough so that the real ibmtr.c
+ driver can find it and work with it properly.
+
+ i.e. We set up the io port, irq, mmio memory and shared ram
+ memory. This enables ibmtr_probe in ibmtr.c to find the card and
+ configure it as though it was a normal ISA and/or PnP card.
+
+ CHANGES
+
+ v2.2.5 April 1999 Mike Phillips (phillim@amtrak.com)
+ Obscure bug fix, required changed to ibmtr.c not ibmtr_cs.c
+
+ v2.2.7 May 1999 Mike Phillips (phillim@amtrak.com)
+ Updated to version 2.2.7 to match the first version of the kernel
+ that the modification to ibmtr.c were incorporated into.
+
+ v2.2.17 July 2000 Burt Silverman (burts@us.ibm.com)
+ Address translation feature of PCMCIA controller is usable so
+ memory windows can be placed in High memory (meaning above
+ 0xFFFFF.)
+
+======================================================================*/
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/module.h>
+#include <linux/ethtool.h>
+#include <linux/netdevice.h>
+#include <linux/trdevice.h>
+#include <linux/ibmtr.h>
+
+#include <pcmcia/version.h>
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+#define PCMCIA
+#include "../tokenring/ibmtr.c"
+
+#ifdef PCMCIA_DEBUG
+static int pc_debug = PCMCIA_DEBUG;
+module_param(pc_debug, int, 0);
+#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
+static char *version =
+"ibmtr_cs.c 1.10 1996/01/06 05:19:00 (Steve Kipisz)\n"
+" 2.2.7 1999/05/03 12:00:00 (Mike Phillips)\n"
+" 2.4.2 2001/30/28 Midnight (Burt Silverman)\n";
+#else
+#define DEBUG(n, args...)
+#endif
+
+/*====================================================================*/
+
+/* Parameters that can be set with 'insmod' */
+
+/* MMIO base address */
+static u_long mmiobase = 0xce000;
+
+/* SRAM base address */
+static u_long srambase = 0xd0000;
+
+/* SRAM size 8,16,32,64 */
+static u_long sramsize = 64;
+
+/* Ringspeed 4,16 */
+static int ringspeed = 16;
+
+module_param(mmiobase, ulong, 0);
+module_param(srambase, ulong, 0);
+module_param(sramsize, ulong, 0);
+module_param(ringspeed, int, 0);
+MODULE_LICENSE("GPL");
+
+/*====================================================================*/
+
+static void ibmtr_config(dev_link_t *link);
+static void ibmtr_hw_setup(struct net_device *dev, u_int mmiobase);
+static void ibmtr_release(dev_link_t *link);
+static int ibmtr_event(event_t event, int priority,
+ event_callback_args_t *args);
+
+static dev_info_t dev_info = "ibmtr_cs";
+
+static dev_link_t *ibmtr_attach(void);
+static void ibmtr_detach(dev_link_t *);
+
+static dev_link_t *dev_list;
+
+extern int ibmtr_probe_card(struct net_device *dev);
+extern irqreturn_t tok_interrupt (int irq, void *dev_id, struct pt_regs *regs);
+
+/*====================================================================*/
+
+typedef struct ibmtr_dev_t {
+ dev_link_t link;
+ struct net_device *dev;
+ dev_node_t node;
+ window_handle_t sram_win_handle;
+ struct tok_info *ti;
+} ibmtr_dev_t;
+
+static void netdev_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ strcpy(info->driver, "ibmtr_cs");
+}
+
+static struct ethtool_ops netdev_ethtool_ops = {
+ .get_drvinfo = netdev_get_drvinfo,
+};
+
+/*======================================================================
+
+ ibmtr_attach() creates an "instance" of the driver, allocating
+ local data structures for one device. The device is registered
+ with Card Services.
+
+======================================================================*/
+
+static dev_link_t *ibmtr_attach(void)
+{
+ ibmtr_dev_t *info;
+ dev_link_t *link;
+ struct net_device *dev;
+ client_reg_t client_reg;
+ int ret;
+
+ DEBUG(0, "ibmtr_attach()\n");
+
+ /* Create new token-ring device */
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info) return NULL;
+ memset(info,0,sizeof(*info));
+ dev = alloc_trdev(sizeof(struct tok_info));
+ if (!dev) {
+ kfree(info);
+ return NULL;
+ }
+
+ link = &info->link;
+ link->priv = info;
+ info->ti = netdev_priv(dev);
+
+ link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
+ link->io.NumPorts1 = 4;
+ link->io.IOAddrLines = 16;
+ link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
+ link->irq.IRQInfo1 = IRQ_LEVEL_ID;
+ link->irq.Handler = &tok_interrupt;
+ link->conf.Attributes = CONF_ENABLE_IRQ;
+ link->conf.Vcc = 50;
+ link->conf.IntType = INT_MEMORY_AND_IO;
+ link->conf.Present = PRESENT_OPTION;
+
+ link->irq.Instance = info->dev = dev;
+
+ SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
+
+ /* Register with Card Services */
+ link->next = dev_list;
+ dev_list = link;
+ client_reg.dev_info = &dev_info;
+ client_reg.EventMask =
+ CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
+ CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
+ CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
+ client_reg.event_handler = &ibmtr_event;
+ client_reg.Version = 0x0210;
+ client_reg.event_callback_args.client_data = link;
+ ret = pcmcia_register_client(&link->handle, &client_reg);
+ if (ret != 0) {
+ cs_error(link->handle, RegisterClient, ret);
+ goto out_detach;
+ }
+
+out:
+ return link;
+
+out_detach:
+ ibmtr_detach(link);
+ link = NULL;
+ goto out;
+} /* ibmtr_attach */
+
+/*======================================================================
+
+ This deletes a driver "instance". The device is de-registered
+ with Card Services. If it has been released, all local data
+ structures are freed. Otherwise, the structures will be freed
+ when the device is released.
+
+======================================================================*/
+
+static void ibmtr_detach(dev_link_t *link)
+{
+ struct ibmtr_dev_t *info = link->priv;
+ dev_link_t **linkp;
+ struct net_device *dev;
+
+ DEBUG(0, "ibmtr_detach(0x%p)\n", link);
+
+ /* Locate device structure */
+ for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
+ if (*linkp == link) break;
+ if (*linkp == NULL)
+ return;
+
+ dev = info->dev;
+
+ if (link->dev)
+ unregister_netdev(dev);
+
+ {
+ struct tok_info *ti = netdev_priv(dev);
+ del_timer_sync(&(ti->tr_timer));
+ }
+ if (link->state & DEV_CONFIG)
+ ibmtr_release(link);
+
+ if (link->handle)
+ pcmcia_deregister_client(link->handle);
+
+ /* Unlink device structure, free bits */
+ *linkp = link->next;
+ free_netdev(dev);
+ kfree(info);
+} /* ibmtr_detach */
+
+/*======================================================================
+
+ ibmtr_config() is scheduled to run after a CARD_INSERTION event
+ is received, to configure the PCMCIA socket, and to make the
+ token-ring device available to the system.
+
+======================================================================*/
+
+#define CS_CHECK(fn, ret) \
+do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
+
+static void ibmtr_config(dev_link_t *link)
+{
+ client_handle_t handle = link->handle;
+ ibmtr_dev_t *info = link->priv;
+ struct net_device *dev = info->dev;
+ struct tok_info *ti = netdev_priv(dev);
+ tuple_t tuple;
+ cisparse_t parse;
+ win_req_t req;
+ memreq_t mem;
+ int i, last_ret, last_fn;
+ u_char buf[64];
+
+ DEBUG(0, "ibmtr_config(0x%p)\n", link);
+
+ tuple.Attributes = 0;
+ tuple.TupleData = buf;
+ tuple.TupleDataMax = 64;
+ tuple.TupleOffset = 0;
+ tuple.DesiredTuple = CISTPL_CONFIG;
+ CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
+ CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
+ CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
+ link->conf.ConfigBase = parse.config.base;
+
+ /* Configure card */
+ link->state |= DEV_CONFIG;
+
+ link->conf.ConfigIndex = 0x61;
+
+ /* Determine if this is PRIMARY or ALTERNATE. */
+
+ /* Try PRIMARY card at 0xA20-0xA23 */
+ link->io.BasePort1 = 0xA20;
+ i = pcmcia_request_io(link->handle, &link->io);
+ if (i != CS_SUCCESS) {
+ /* Couldn't get 0xA20-0xA23. Try ALTERNATE at 0xA24-0xA27. */
+ link->io.BasePort1 = 0xA24;
+ CS_CHECK(RequestIO, pcmcia_request_io(link->handle, &link->io));
+ }
+ dev->base_addr = link->io.BasePort1;
+
+ CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq));
+ dev->irq = link->irq.AssignedIRQ;
+ ti->irq = link->irq.AssignedIRQ;
+ ti->global_int_enable=GLOBAL_INT_ENABLE+((dev->irq==9) ? 2 : dev->irq);
+
+ /* Allocate the MMIO memory window */
+ req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM|WIN_ENABLE;
+ req.Attributes |= WIN_USE_WAIT;
+ req.Base = 0;
+ req.Size = 0x2000;
+ req.AccessSpeed = 250;
+ CS_CHECK(RequestWindow, pcmcia_request_window(&link->handle, &req, &link->win));
+
+ mem.CardOffset = mmiobase;
+ mem.Page = 0;
+ CS_CHECK(MapMemPage, pcmcia_map_mem_page(link->win, &mem));
+ ti->mmio = ioremap(req.Base, req.Size);
+
+ /* Allocate the SRAM memory window */
+ req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM|WIN_ENABLE;
+ req.Attributes |= WIN_USE_WAIT;
+ req.Base = 0;
+ req.Size = sramsize * 1024;
+ req.AccessSpeed = 250;
+ CS_CHECK(RequestWindow, pcmcia_request_window(&link->handle, &req, &info->sram_win_handle));
+
+ mem.CardOffset = srambase;
+ mem.Page = 0;
+ CS_CHECK(MapMemPage, pcmcia_map_mem_page(info->sram_win_handle, &mem));
+
+ ti->sram_base = mem.CardOffset >> 12;
+ ti->sram_virt = ioremap(req.Base, req.Size);
+ ti->sram_phys = req.Base;
+
+ CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));
+
+ /* Set up the Token-Ring Controller Configuration Register and
+ turn on the card. Check the "Local Area Network Credit Card
+ Adapters Technical Reference" SC30-3585 for this info. */
+ ibmtr_hw_setup(dev, mmiobase);
+
+ link->dev = &info->node;
+ link->state &= ~DEV_CONFIG_PENDING;
+ SET_NETDEV_DEV(dev, &handle_to_dev(handle));
+
+ i = ibmtr_probe_card(dev);
+ if (i != 0) {
+ printk(KERN_NOTICE "ibmtr_cs: register_netdev() failed\n");
+ link->dev = NULL;
+ goto failed;
+ }
+
+ strcpy(info->node.dev_name, dev->name);
+
+ printk(KERN_INFO "%s: port %#3lx, irq %d,",
+ dev->name, dev->base_addr, dev->irq);
+ printk (" mmio %#5lx,", (u_long)ti->mmio);
+ printk (" sram %#5lx,", (u_long)ti->sram_base << 12);
+ printk ("\n" KERN_INFO " hwaddr=");
+ for (i = 0; i < TR_ALEN; i++)
+ printk("%02X", dev->dev_addr[i]);
+ printk("\n");
+ return;
+
+cs_failed:
+ cs_error(link->handle, last_fn, last_ret);
+failed:
+ ibmtr_release(link);
+} /* ibmtr_config */
+
+/*======================================================================
+
+ After a card is removed, ibmtr_release() will unregister the net
+ device, and release the PCMCIA configuration. If the device is
+ still open, this will be postponed until it is closed.
+
+======================================================================*/
+
+static void ibmtr_release(dev_link_t *link)
+{
+ ibmtr_dev_t *info = link->priv;
+ struct net_device *dev = info->dev;
+
+ DEBUG(0, "ibmtr_release(0x%p)\n", link);
+
+ pcmcia_release_configuration(link->handle);
+ pcmcia_release_io(link->handle, &link->io);
+ pcmcia_release_irq(link->handle, &link->irq);
+ if (link->win) {
+ struct tok_info *ti = netdev_priv(dev);
+ iounmap(ti->mmio);
+ pcmcia_release_window(link->win);
+ pcmcia_release_window(info->sram_win_handle);
+ }
+
+ link->state &= ~DEV_CONFIG;
+}
+
+/*======================================================================
+
+ The card status event handler. Mostly, this schedules other
+ stuff to run after an event is received. A CARD_REMOVAL event
+ also sets some flags to discourage the net drivers from trying
+ to talk to the card any more.
+
+======================================================================*/
+
+static int ibmtr_event(event_t event, int priority,
+ event_callback_args_t *args)
+{
+ dev_link_t *link = args->client_data;
+ ibmtr_dev_t *info = link->priv;
+ struct net_device *dev = info->dev;
+
+ DEBUG(1, "ibmtr_event(0x%06x)\n", event);
+
+ switch (event) {
+ case CS_EVENT_CARD_REMOVAL:
+ link->state &= ~DEV_PRESENT;
+ if (link->state & DEV_CONFIG) {
+ /* set flag to bypass normal interrupt code */
+ struct tok_info *priv = netdev_priv(dev);
+ priv->sram_phys |= 1;
+ netif_device_detach(dev);
+ }
+ break;
+ case CS_EVENT_CARD_INSERTION:
+ link->state |= DEV_PRESENT;
+ ibmtr_config(link);
+ break;
+ case CS_EVENT_PM_SUSPEND:
+ link->state |= DEV_SUSPEND;
+ /* Fall through... */
+ case CS_EVENT_RESET_PHYSICAL:
+ if (link->state & DEV_CONFIG) {
+ if (link->open)
+ netif_device_detach(dev);
+ pcmcia_release_configuration(link->handle);
+ }
+ break;
+ case CS_EVENT_PM_RESUME:
+ link->state &= ~DEV_SUSPEND;
+ /* Fall through... */
+ case CS_EVENT_CARD_RESET:
+ if (link->state & DEV_CONFIG) {
+ pcmcia_request_configuration(link->handle, &link->conf);
+ if (link->open) {
+ ibmtr_probe(dev); /* really? */
+ netif_device_attach(dev);
+ }
+ }
+ break;
+ }
+ return 0;
+} /* ibmtr_event */
+
+/*====================================================================*/
+
+static void ibmtr_hw_setup(struct net_device *dev, u_int mmiobase)
+{
+ int i;
+
+ /* Bizarre IBM behavior, there are 16 bits of information we
+ need to set, but the card only allows us to send 4 bits at a
+ time. For each byte sent to base_addr, bits 7-4 tell the
+ card which part of the 16 bits we are setting, bits 3-0 contain
+ the actual information */
+
+ /* First nibble provides 4 bits of mmio */
+ i = (mmiobase >> 16) & 0x0F;
+ outb(i, dev->base_addr);
+
+ /* Second nibble provides 3 bits of mmio */
+ i = 0x10 | ((mmiobase >> 12) & 0x0E);
+ outb(i, dev->base_addr);
+
+ /* Third nibble, hard-coded values */
+ i = 0x26;
+ outb(i, dev->base_addr);
+
+ /* Fourth nibble sets shared ram page size */
+
+ /* 8 = 00, 16 = 01, 32 = 10, 64 = 11 */
+ i = (sramsize >> 4) & 0x07;
+ i = ((i == 4) ? 3 : i) << 2;
+ i |= 0x30;
+
+ if (ringspeed == 16)
+ i |= 2;
+ if (dev->base_addr == 0xA24)
+ i |= 1;
+ outb(i, dev->base_addr);
+
+ /* 0x40 will release the card for use */
+ outb(0x40, dev->base_addr);
+
+ return;
+}
+
+static struct pcmcia_driver ibmtr_cs_driver = {
+ .owner = THIS_MODULE,
+ .drv = {
+ .name = "ibmtr_cs",
+ },
+ .attach = ibmtr_attach,
+ .detach = ibmtr_detach,
+};
+
+static int __init init_ibmtr_cs(void)
+{
+ return pcmcia_register_driver(&ibmtr_cs_driver);
+}
+
+static void __exit exit_ibmtr_cs(void)
+{
+ pcmcia_unregister_driver(&ibmtr_cs_driver);
+ BUG_ON(dev_list != NULL);
+}
+
+module_init(init_ibmtr_cs);
+module_exit(exit_ibmtr_cs);
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