ibmtr_cs.c
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- /*======================================================================
- 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/sched.h>
- #include <linux/ptrace.h>
- #include <linux/slab.h>
- #include <linux/string.h>
- #include <linux/timer.h>
- #include <linux/module.h>
- #include <asm/io.h>
- #include <asm/system.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>
- #define PCMCIA
- #include "../tokenring/ibmtr.c"
- #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 =
- "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' */
- /* Bit map of interrupts to choose from */
- static u_int irq_mask = 0xdeb8;
- static int irq_list[4] = { -1 };
- /* 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_PARM(irq_mask, "i");
- MODULE_PARM(irq_list, "1-4i");
- MODULE_PARM(mmiobase, "i");
- MODULE_PARM(srambase, "i");
- MODULE_PARM(sramsize, "i");
- MODULE_PARM(ringspeed, "i");
- 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(u_long arg);
- 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(struct net_device *dev);
- extern int trdev_init(struct net_device *dev);
- extern void 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;
- /*======================================================================
- This bit of code is used to avoid unregistering network devices
- at inappropriate times. 2.2 and later kernels are fairly picky
- about when this can happen.
-
- ======================================================================*/
- static void flush_stale_links(void)
- {
- dev_link_t *link, *next;
- for (link = dev_list; link; link = next) {
- next = link->next;
- if (link->state & DEV_STALE_LINK)
- ibmtr_detach(link);
- }
- }
- /*====================================================================*/
- static void cs_error(client_handle_t handle, int func, int ret)
- {
- error_info_t err = { func, ret };
- CardServices(ReportError, handle, &err);
- }
- /*======================================================================
- 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 i, ret;
-
- DEBUG(0, "ibmtr_attach()n");
- flush_stale_links();
- /* Create new token-ring device */
- info = kmalloc(sizeof(*info), GFP_KERNEL);
- if (!info) return NULL;
- memset(info, 0, sizeof(*info));
- link = &info->link; link->priv = info;
- link->release.function = &ibmtr_release;
- link->release.data = (u_long)link;
- 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_INFO2_VALID|IRQ_LEVEL_ID;
- if (irq_list[0] == -1)
- link->irq.IRQInfo2 = irq_mask;
- else
- for (i = 0; i < 4; i++)
- link->irq.IRQInfo2 |= 1 << irq_list[i];
- 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;
- dev = init_trdev(NULL,0);
- if (dev == NULL) {
- ibmtr_detach(link);
- return NULL;
- }
- dev->priv = &info->ti;
- link->irq.Instance = info->dev = dev;
-
- dev->init = &ibmtr_probe;
- /* Register with Card Services */
- link->next = dev_list;
- dev_list = link;
- client_reg.dev_info = &dev_info;
- client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
- 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 = CardServices(RegisterClient, &link->handle, &client_reg);
- if (ret != 0) {
- cs_error(link->handle, RegisterClient, ret);
- ibmtr_detach(link);
- return NULL;
- }
- return link;
- } /* 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;
- {
- struct tok_info *ti = (struct tok_info *)dev->priv;
- del_timer(&(ti->tr_timer));
- }
- del_timer(&link->release);
- if (link->state & DEV_CONFIG) {
- ibmtr_release((u_long)link);
- if (link->state & DEV_STALE_CONFIG) {
- link->state |= DEV_STALE_LINK;
- return;
- }
- }
- if (link->handle)
- CardServices(DeregisterClient, link->handle);
- /* Unlink device structure, free bits */
- *linkp = link->next;
- if (info->dev) {
- unregister_trdev(info->dev);
- kfree(info->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, args...)
- while ((last_ret=CardServices(last_fn=(fn), args))!=0) goto cs_failed
- 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 = dev->priv;
- 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, handle, &tuple);
- CS_CHECK(GetTupleData, handle, &tuple);
- CS_CHECK(ParseTuple, 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 = CardServices(RequestIO, link->handle, &link->io);
- if (i == CS_SUCCESS) {
- memcpy(info->node.dev_name, "tr0 ", 4);
- } else {
- /* Couldn't get 0xA20-0xA23. Try ALTERNATE at 0xA24-0xA27. */
- link->io.BasePort1 = 0xA24;
- CS_CHECK(RequestIO, link->handle, &link->io);
- memcpy(info->node.dev_name, "tr1 ", 4);
- }
- dev->base_addr = link->io.BasePort1;
- CS_CHECK(RequestIRQ, 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;
- link->win = (window_handle_t)link->handle;
- CS_CHECK(RequestWindow, &link->win, &req);
- mem.CardOffset = mmiobase;
- mem.Page = 0;
- CS_CHECK(MapMemPage, 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;
- info->sram_win_handle = (window_handle_t)link->handle;
- CS_CHECK(RequestWindow, &info->sram_win_handle, &req);
- mem.CardOffset = srambase;
- mem.Page = 0;
- CS_CHECK(MapMemPage, info->sram_win_handle, &mem);
- ti->sram_base = mem.CardOffset >> 12;
- ti->sram_virt = (u_long)ioremap(req.Base, req.Size);
- CS_CHECK(RequestConfiguration, 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);
- i = register_trdev(dev);
-
- if (i != 0) {
- printk(KERN_NOTICE "ibmtr_cs: register_trdev() failedn");
- goto failed;
- }
- link->dev = &info->node;
- link->state &= ~DEV_CONFIG_PENDING;
- 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((u_long)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(u_long arg)
- {
- dev_link_t *link = (dev_link_t *)arg;
- ibmtr_dev_t *info = link->priv;
- struct net_device *dev = info->dev;
- DEBUG(0, "ibmtr_release(0x%p)n", link);
- if (link->open) {
- DEBUG(1, "ibmtr_cs: release postponed, '%s' "
- "still openn", info->node.dev_name);
- link->state |= DEV_STALE_CONFIG;
- return;
- }
- CardServices(ReleaseConfiguration, link->handle);
- CardServices(ReleaseIO, link->handle, &link->io);
- CardServices(ReleaseIRQ, link->handle, &link->irq);
- if (link->win) {
- struct tok_info *ti = dev->priv;
- iounmap((void *)ti->mmio);
- CardServices(ReleaseWindow, link->win);
- CardServices(ReleaseWindow, info->sram_win_handle);
- }
- link->state &= ~DEV_CONFIG;
- } /* ibmtr_release */
- /*======================================================================
- 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 *)dev->priv)->sram_virt |= 1;
- netif_device_detach(dev);
- mod_timer(&link->release, jiffies + HZ/20);
- }
- 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);
- CardServices(ReleaseConfiguration, link->handle);
- }
- break;
- case CS_EVENT_PM_RESUME:
- link->state &= ~DEV_SUSPEND;
- /* Fall through... */
- case CS_EVENT_CARD_RESET:
- if (link->state & DEV_CONFIG) {
- CardServices(RequestConfiguration, link->handle, &link->conf);
- if (link->open) {
- (dev->init)(dev);
- 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 int __init init_ibmtr_cs(void)
- {
- servinfo_t serv;
- DEBUG(0, "%s", version);
- CardServices(GetCardServicesInfo, &serv);
- if (serv.Revision != CS_RELEASE_CODE) {
- printk(KERN_NOTICE "ibmtr_cs: Card Services release "
- "does not match!n");
- return -1;
- }
- register_pccard_driver(&dev_info, &ibmtr_attach, &ibmtr_detach);
- return 0;
- }
- static void __exit exit_ibmtr_cs(void)
- {
- DEBUG(0, "ibmtr_cs: unloadingn");
- unregister_pccard_driver(&dev_info);
- while (dev_list != NULL)
- ibmtr_detach(dev_list);
- }
- module_init(init_ibmtr_cs);
- module_exit(exit_ibmtr_cs);