1 /*======================================================================
3 A PCMCIA token-ring driver for IBM-based cards
5 This driver supports the IBM PCMCIA Token-Ring Card.
6 Written by Steve Kipisz, kipisz@vnet.ibm.com or
11 This code is based on pcnet_cs.c from David Hinds.
13 V2.2.0 February 1999 - Mike Phillips phillim@amtrak.com
15 Linux V2.2.x presented significant changes to the underlying
16 ibmtr.c code. Mainly the code became a lot more organized and
19 This caused the old PCMCIA Token Ring driver to give up and go
20 home early. Instead of just patching the old code to make it
21 work, the PCMCIA code has been streamlined, updated and possibly
24 This code now only contains code required for the Card Services.
25 All we do here is set the card up enough so that the real ibmtr.c
26 driver can find it and work with it properly.
28 i.e. We set up the io port, irq, mmio memory and shared ram
29 memory. This enables ibmtr_probe in ibmtr.c to find the card and
30 configure it as though it was a normal ISA and/or PnP card.
34 v2.2.5 April 1999 Mike Phillips (phillim@amtrak.com)
35 Obscure bug fix, required changed to ibmtr.c not ibmtr_cs.c
37 v2.2.7 May 1999 Mike Phillips (phillim@amtrak.com)
38 Updated to version 2.2.7 to match the first version of the kernel
39 that the modification to ibmtr.c were incorporated into.
41 v2.2.17 July 2000 Burt Silverman (burts@us.ibm.com)
42 Address translation feature of PCMCIA controller is usable so
43 memory windows can be placed in High memory (meaning above
46 ======================================================================*/
48 #include <linux/kernel.h>
49 #include <linux/init.h>
50 #include <linux/ptrace.h>
51 #include <linux/slab.h>
52 #include <linux/string.h>
53 #include <linux/timer.h>
54 #include <linux/module.h>
55 #include <linux/netdevice.h>
56 #include <linux/trdevice.h>
57 #include <linux/ibmtr.h>
59 #include <pcmcia/cs.h>
60 #include <pcmcia/cistpl.h>
61 #include <pcmcia/ds.h>
63 #include <asm/uaccess.h>
65 #include <asm/system.h>
68 #include "../tokenring/ibmtr.c"
71 /*====================================================================*/
73 /* Parameters that can be set with 'insmod' */
75 /* MMIO base address */
76 static u_long mmiobase = 0xce000;
78 /* SRAM base address */
79 static u_long srambase = 0xd0000;
81 /* SRAM size 8,16,32,64 */
82 static u_long sramsize = 64;
85 static int ringspeed = 16;
87 module_param(mmiobase, ulong, 0);
88 module_param(srambase, ulong, 0);
89 module_param(sramsize, ulong, 0);
90 module_param(ringspeed, int, 0);
91 MODULE_LICENSE("GPL");
93 /*====================================================================*/
95 static int ibmtr_config(struct pcmcia_device *link);
96 static void ibmtr_hw_setup(struct net_device *dev, u_int mmiobase);
97 static void ibmtr_release(struct pcmcia_device *link);
98 static void ibmtr_detach(struct pcmcia_device *p_dev);
100 /*====================================================================*/
102 typedef struct ibmtr_dev_t {
103 struct pcmcia_device *p_dev;
104 struct net_device *dev;
105 window_handle_t sram_win_handle;
109 static irqreturn_t ibmtr_interrupt(int irq, void *dev_id) {
110 ibmtr_dev_t *info = dev_id;
111 struct net_device *dev = info->dev;
112 return tok_interrupt(irq, dev);
115 /*======================================================================
117 ibmtr_attach() creates an "instance" of the driver, allocating
118 local data structures for one device. The device is registered
121 ======================================================================*/
123 static int __devinit ibmtr_attach(struct pcmcia_device *link)
126 struct net_device *dev;
128 dev_dbg(&link->dev, "ibmtr_attach()\n");
130 /* Create new token-ring device */
131 info = kzalloc(sizeof(*info), GFP_KERNEL);
132 if (!info) return -ENOMEM;
133 dev = alloc_trdev(sizeof(struct tok_info));
141 info->ti = netdev_priv(dev);
143 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
144 link->resource[0]->end = 4;
145 link->conf.Attributes = CONF_ENABLE_IRQ;
146 link->conf.IntType = INT_MEMORY_AND_IO;
147 link->conf.Present = PRESENT_OPTION;
151 return ibmtr_config(link);
154 /*======================================================================
156 This deletes a driver "instance". The device is de-registered
157 with Card Services. If it has been released, all local data
158 structures are freed. Otherwise, the structures will be freed
159 when the device is released.
161 ======================================================================*/
163 static void ibmtr_detach(struct pcmcia_device *link)
165 struct ibmtr_dev_t *info = link->priv;
166 struct net_device *dev = info->dev;
167 struct tok_info *ti = netdev_priv(dev);
169 dev_dbg(&link->dev, "ibmtr_detach\n");
172 * When the card removal interrupt hits tok_interrupt(),
173 * bail out early, so we don't crash the machine
177 unregister_netdev(dev);
179 del_timer_sync(&(ti->tr_timer));
187 /*======================================================================
189 ibmtr_config() is scheduled to run after a CARD_INSERTION event
190 is received, to configure the PCMCIA socket, and to make the
191 token-ring device available to the system.
193 ======================================================================*/
195 static int __devinit ibmtr_config(struct pcmcia_device *link)
197 ibmtr_dev_t *info = link->priv;
198 struct net_device *dev = info->dev;
199 struct tok_info *ti = netdev_priv(dev);
203 dev_dbg(&link->dev, "ibmtr_config\n");
205 link->conf.ConfigIndex = 0x61;
208 /* Determine if this is PRIMARY or ALTERNATE. */
210 /* Try PRIMARY card at 0xA20-0xA23 */
211 link->resource[0]->start = 0xA20;
212 i = pcmcia_request_io(link);
214 /* Couldn't get 0xA20-0xA23. Try ALTERNATE at 0xA24-0xA27. */
215 link->resource[0]->start = 0xA24;
216 ret = pcmcia_request_io(link);
220 dev->base_addr = link->resource[0]->start;
222 ret = pcmcia_request_exclusive_irq(link, ibmtr_interrupt);
225 dev->irq = link->irq;
227 ti->global_int_enable=GLOBAL_INT_ENABLE+((dev->irq==9) ? 2 : dev->irq);
229 /* Allocate the MMIO memory window */
230 req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM|WIN_ENABLE;
231 req.Attributes |= WIN_USE_WAIT;
234 req.AccessSpeed = 250;
235 ret = pcmcia_request_window(link, &req, &link->win);
239 ret = pcmcia_map_mem_page(link, link->win, mmiobase);
242 ti->mmio = ioremap(req.Base, req.Size);
244 /* Allocate the SRAM memory window */
245 req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM|WIN_ENABLE;
246 req.Attributes |= WIN_USE_WAIT;
248 req.Size = sramsize * 1024;
249 req.AccessSpeed = 250;
250 ret = pcmcia_request_window(link, &req, &info->sram_win_handle);
254 ret = pcmcia_map_mem_page(link, info->sram_win_handle, srambase);
258 ti->sram_base = srambase >> 12;
259 ti->sram_virt = ioremap(req.Base, req.Size);
260 ti->sram_phys = req.Base;
262 ret = pcmcia_request_configuration(link, &link->conf);
266 /* Set up the Token-Ring Controller Configuration Register and
267 turn on the card. Check the "Local Area Network Credit Card
268 Adapters Technical Reference" SC30-3585 for this info. */
269 ibmtr_hw_setup(dev, mmiobase);
271 SET_NETDEV_DEV(dev, &link->dev);
273 i = ibmtr_probe_card(dev);
275 printk(KERN_NOTICE "ibmtr_cs: register_netdev() failed\n");
280 "%s: port %#3lx, irq %d, mmio %#5lx, sram %#5lx, hwaddr=%pM\n",
281 dev->name, dev->base_addr, dev->irq,
282 (u_long)ti->mmio, (u_long)(ti->sram_base << 12),
291 /*======================================================================
293 After a card is removed, ibmtr_release() will unregister the net
294 device, and release the PCMCIA configuration. If the device is
295 still open, this will be postponed until it is closed.
297 ======================================================================*/
299 static void ibmtr_release(struct pcmcia_device *link)
301 ibmtr_dev_t *info = link->priv;
302 struct net_device *dev = info->dev;
304 dev_dbg(&link->dev, "ibmtr_release\n");
307 struct tok_info *ti = netdev_priv(dev);
310 pcmcia_disable_device(link);
313 static int ibmtr_suspend(struct pcmcia_device *link)
315 ibmtr_dev_t *info = link->priv;
316 struct net_device *dev = info->dev;
319 netif_device_detach(dev);
324 static int __devinit ibmtr_resume(struct pcmcia_device *link)
326 ibmtr_dev_t *info = link->priv;
327 struct net_device *dev = info->dev;
330 ibmtr_probe(dev); /* really? */
331 netif_device_attach(dev);
338 /*====================================================================*/
340 static void ibmtr_hw_setup(struct net_device *dev, u_int mmiobase)
344 /* Bizarre IBM behavior, there are 16 bits of information we
345 need to set, but the card only allows us to send 4 bits at a
346 time. For each byte sent to base_addr, bits 7-4 tell the
347 card which part of the 16 bits we are setting, bits 3-0 contain
348 the actual information */
350 /* First nibble provides 4 bits of mmio */
351 i = (mmiobase >> 16) & 0x0F;
352 outb(i, dev->base_addr);
354 /* Second nibble provides 3 bits of mmio */
355 i = 0x10 | ((mmiobase >> 12) & 0x0E);
356 outb(i, dev->base_addr);
358 /* Third nibble, hard-coded values */
360 outb(i, dev->base_addr);
362 /* Fourth nibble sets shared ram page size */
364 /* 8 = 00, 16 = 01, 32 = 10, 64 = 11 */
365 i = (sramsize >> 4) & 0x07;
366 i = ((i == 4) ? 3 : i) << 2;
371 if (dev->base_addr == 0xA24)
373 outb(i, dev->base_addr);
375 /* 0x40 will release the card for use */
376 outb(0x40, dev->base_addr);
379 static struct pcmcia_device_id ibmtr_ids[] = {
380 PCMCIA_DEVICE_PROD_ID12("3Com", "TokenLink Velocity PC Card", 0x41240e5b, 0x82c3734e),
381 PCMCIA_DEVICE_PROD_ID12("IBM", "TOKEN RING", 0xb569a6e5, 0xbf8eed47),
384 MODULE_DEVICE_TABLE(pcmcia, ibmtr_ids);
386 static struct pcmcia_driver ibmtr_cs_driver = {
387 .owner = THIS_MODULE,
391 .probe = ibmtr_attach,
392 .remove = ibmtr_detach,
393 .id_table = ibmtr_ids,
394 .suspend = ibmtr_suspend,
395 .resume = ibmtr_resume,
398 static int __init init_ibmtr_cs(void)
400 return pcmcia_register_driver(&ibmtr_cs_driver);
403 static void __exit exit_ibmtr_cs(void)
405 pcmcia_unregister_driver(&ibmtr_cs_driver);
408 module_init(init_ibmtr_cs);
409 module_exit(exit_ibmtr_cs);