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509 lines
13 KiB
509 lines
13 KiB
/*
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* Linux ARCnet driver - COM20020 PCMCIA support
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*
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* Written 1994-1999 by Avery Pennarun,
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* based on an ISA version by David Woodhouse.
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* Derived from ibmtr_cs.c by Steve Kipisz (pcmcia-cs 3.1.4)
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* which was derived from pcnet_cs.c by David Hinds.
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* Some additional portions derived from skeleton.c by Donald Becker.
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*
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* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
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* for sponsoring the further development of this driver.
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*
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* **********************
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*
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* The original copyright of skeleton.c was as follows:
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*
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* skeleton.c Written 1993 by Donald Becker.
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* Copyright 1993 United States Government as represented by the
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* Director, National Security Agency. This software may only be used
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* and distributed according to the terms of the GNU General Public License as
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* modified by SRC, incorporated herein by reference.
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*
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* **********************
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* Changes:
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* Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 08/08/2000
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* - reorganize kmallocs in com20020_attach, checking all for failure
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* and releasing the previous allocations if one fails
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* **********************
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*
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* For more details, see drivers/net/arcnet.c
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*
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* **********************
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/ptrace.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/arcdevice.h>
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#include <linux/com20020.h>
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#include <pcmcia/version.h>
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#include <pcmcia/cs_types.h>
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#include <pcmcia/cs.h>
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#include <pcmcia/cistpl.h>
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#include <pcmcia/ds.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"
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#ifdef PCMCIA_DEBUG
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static int pc_debug = PCMCIA_DEBUG;
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module_param(pc_debug, int, 0);
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#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
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static void regdump(struct net_device *dev)
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{
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int ioaddr = dev->base_addr;
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int count;
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printk("com20020 register dump:\n");
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for (count = ioaddr; count < ioaddr + 16; count++)
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{
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if (!(count % 16))
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printk("\n%04X: ", count);
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printk("%02X ", inb(count));
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}
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printk("\n");
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printk("buffer0 dump:\n");
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/* set up the address register */
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count = 0;
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outb((count >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
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outb(count & 0xff, _ADDR_LO);
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for (count = 0; count < 256+32; count++)
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{
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if (!(count % 16))
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printk("\n%04X: ", count);
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/* copy the data */
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printk("%02X ", inb(_MEMDATA));
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}
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printk("\n");
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}
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#else
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#define DEBUG(n, args...) do { } while (0)
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static inline void regdump(struct net_device *dev) { }
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#endif
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/*====================================================================*/
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/* Parameters that can be set with 'insmod' */
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static int node;
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static int timeout = 3;
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static int backplane;
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static int clockp;
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static int clockm;
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module_param(node, int, 0);
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module_param(timeout, int, 0);
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module_param(backplane, int, 0);
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module_param(clockp, int, 0);
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module_param(clockm, int, 0);
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MODULE_LICENSE("GPL");
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/*====================================================================*/
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static void com20020_config(dev_link_t *link);
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static void com20020_release(dev_link_t *link);
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static int com20020_event(event_t event, int priority,
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event_callback_args_t *args);
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static dev_info_t dev_info = "com20020_cs";
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static dev_link_t *com20020_attach(void);
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static void com20020_detach(dev_link_t *);
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static dev_link_t *dev_list;
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/*====================================================================*/
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typedef struct com20020_dev_t {
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struct net_device *dev;
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dev_node_t node;
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} com20020_dev_t;
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/*======================================================================
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com20020_attach() creates an "instance" of the driver, allocating
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local data structures for one device. The device is registered
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with Card Services.
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======================================================================*/
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static dev_link_t *com20020_attach(void)
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{
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client_reg_t client_reg;
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dev_link_t *link;
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com20020_dev_t *info;
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struct net_device *dev;
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int ret;
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struct arcnet_local *lp;
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DEBUG(0, "com20020_attach()\n");
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/* Create new network device */
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link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
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if (!link)
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return NULL;
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info = kmalloc(sizeof(struct com20020_dev_t), GFP_KERNEL);
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if (!info)
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goto fail_alloc_info;
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dev = alloc_arcdev("");
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if (!dev)
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goto fail_alloc_dev;
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memset(info, 0, sizeof(struct com20020_dev_t));
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memset(link, 0, sizeof(struct dev_link_t));
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lp = dev->priv;
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lp->timeout = timeout;
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lp->backplane = backplane;
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lp->clockp = clockp;
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lp->clockm = clockm & 3;
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lp->hw.owner = THIS_MODULE;
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/* fill in our module parameters as defaults */
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dev->dev_addr[0] = node;
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link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
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link->io.NumPorts1 = 16;
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link->io.IOAddrLines = 16;
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link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
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link->irq.IRQInfo1 = IRQ_LEVEL_ID;
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link->conf.Attributes = CONF_ENABLE_IRQ;
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link->conf.Vcc = 50;
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link->conf.IntType = INT_MEMORY_AND_IO;
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link->conf.Present = PRESENT_OPTION;
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link->irq.Instance = info->dev = dev;
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link->priv = info;
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/* Register with Card Services */
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link->next = dev_list;
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dev_list = link;
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client_reg.dev_info = &dev_info;
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client_reg.EventMask =
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CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
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CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
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CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
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client_reg.event_handler = &com20020_event;
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client_reg.Version = 0x0210;
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client_reg.event_callback_args.client_data = link;
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ret = pcmcia_register_client(&link->handle, &client_reg);
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if (ret != 0) {
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cs_error(link->handle, RegisterClient, ret);
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com20020_detach(link);
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return NULL;
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}
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return link;
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fail_alloc_dev:
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kfree(info);
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fail_alloc_info:
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kfree(link);
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return NULL;
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} /* com20020_attach */
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/*======================================================================
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This deletes a driver "instance". The device is de-registered
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with Card Services. If it has been released, all local data
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structures are freed. Otherwise, the structures will be freed
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when the device is released.
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======================================================================*/
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static void com20020_detach(dev_link_t *link)
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{
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struct com20020_dev_t *info = link->priv;
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dev_link_t **linkp;
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struct net_device *dev;
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DEBUG(1,"detach...\n");
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DEBUG(0, "com20020_detach(0x%p)\n", link);
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/* Locate device structure */
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for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
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if (*linkp == link) break;
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if (*linkp == NULL)
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return;
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dev = info->dev;
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if (link->dev) {
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DEBUG(1,"unregister...\n");
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unregister_netdev(dev);
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/*
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* this is necessary because we register our IRQ separately
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* from card services.
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*/
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if (dev->irq)
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free_irq(dev->irq, dev);
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}
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if (link->state & DEV_CONFIG)
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com20020_release(link);
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if (link->handle)
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pcmcia_deregister_client(link->handle);
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/* Unlink device structure, free bits */
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DEBUG(1,"unlinking...\n");
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*linkp = link->next;
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if (link->priv)
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{
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dev = info->dev;
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if (dev)
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{
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DEBUG(1,"kfree...\n");
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free_netdev(dev);
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}
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DEBUG(1,"kfree2...\n");
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kfree(info);
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}
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DEBUG(1,"kfree3...\n");
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kfree(link);
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} /* com20020_detach */
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/*======================================================================
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com20020_config() is scheduled to run after a CARD_INSERTION event
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is received, to configure the PCMCIA socket, and to make the
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device available to the system.
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======================================================================*/
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#define CS_CHECK(fn, ret) \
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do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
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static void com20020_config(dev_link_t *link)
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{
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struct arcnet_local *lp;
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client_handle_t handle;
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tuple_t tuple;
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cisparse_t parse;
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com20020_dev_t *info;
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struct net_device *dev;
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int i, last_ret, last_fn;
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u_char buf[64];
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int ioaddr;
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handle = link->handle;
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info = link->priv;
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dev = info->dev;
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DEBUG(1,"config...\n");
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DEBUG(0, "com20020_config(0x%p)\n", link);
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tuple.Attributes = 0;
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tuple.TupleData = buf;
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tuple.TupleDataMax = 64;
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tuple.TupleOffset = 0;
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tuple.DesiredTuple = CISTPL_CONFIG;
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CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
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CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
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CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
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link->conf.ConfigBase = parse.config.base;
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/* Configure card */
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link->state |= DEV_CONFIG;
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DEBUG(1,"arcnet: baseport1 is %Xh\n", link->io.BasePort1);
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i = !CS_SUCCESS;
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if (!link->io.BasePort1)
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{
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for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
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{
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link->io.BasePort1 = ioaddr;
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i = pcmcia_request_io(link->handle, &link->io);
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if (i == CS_SUCCESS)
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break;
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}
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}
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else
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i = pcmcia_request_io(link->handle, &link->io);
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if (i != CS_SUCCESS)
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{
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DEBUG(1,"arcnet: requestIO failed totally!\n");
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goto failed;
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}
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ioaddr = dev->base_addr = link->io.BasePort1;
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DEBUG(1,"arcnet: got ioaddr %Xh\n", ioaddr);
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DEBUG(1,"arcnet: request IRQ %d (%Xh/%Xh)\n",
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link->irq.AssignedIRQ,
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link->irq.IRQInfo1, link->irq.IRQInfo2);
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i = pcmcia_request_irq(link->handle, &link->irq);
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if (i != CS_SUCCESS)
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{
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DEBUG(1,"arcnet: requestIRQ failed totally!\n");
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goto failed;
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}
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dev->irq = link->irq.AssignedIRQ;
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CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));
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if (com20020_check(dev))
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{
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regdump(dev);
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goto failed;
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}
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lp = dev->priv;
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lp->card_name = "PCMCIA COM20020";
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lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
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link->dev = &info->node;
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link->state &= ~DEV_CONFIG_PENDING;
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SET_NETDEV_DEV(dev, &handle_to_dev(handle));
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i = com20020_found(dev, 0); /* calls register_netdev */
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if (i != 0) {
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DEBUG(1,KERN_NOTICE "com20020_cs: com20020_found() failed\n");
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link->dev = NULL;
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goto failed;
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}
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strcpy(info->node.dev_name, dev->name);
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DEBUG(1,KERN_INFO "%s: port %#3lx, irq %d\n",
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dev->name, dev->base_addr, dev->irq);
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return;
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cs_failed:
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cs_error(link->handle, last_fn, last_ret);
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failed:
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DEBUG(1,"com20020_config failed...\n");
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com20020_release(link);
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} /* com20020_config */
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/*======================================================================
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After a card is removed, com20020_release() will unregister the net
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device, and release the PCMCIA configuration. If the device is
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still open, this will be postponed until it is closed.
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======================================================================*/
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static void com20020_release(dev_link_t *link)
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{
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DEBUG(1,"release...\n");
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DEBUG(0, "com20020_release(0x%p)\n", link);
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pcmcia_release_configuration(link->handle);
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pcmcia_release_io(link->handle, &link->io);
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pcmcia_release_irq(link->handle, &link->irq);
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link->state &= ~(DEV_CONFIG | DEV_RELEASE_PENDING);
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}
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/*======================================================================
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The card status event handler. Mostly, this schedules other
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stuff to run after an event is received. A CARD_REMOVAL event
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also sets some flags to discourage the net drivers from trying
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to talk to the card any more.
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======================================================================*/
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static int com20020_event(event_t event, int priority,
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event_callback_args_t *args)
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{
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dev_link_t *link = args->client_data;
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com20020_dev_t *info = link->priv;
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struct net_device *dev = info->dev;
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DEBUG(1, "com20020_event(0x%06x)\n", event);
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switch (event) {
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case CS_EVENT_CARD_REMOVAL:
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link->state &= ~DEV_PRESENT;
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if (link->state & DEV_CONFIG)
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netif_device_detach(dev);
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break;
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case CS_EVENT_CARD_INSERTION:
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link->state |= DEV_PRESENT;
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com20020_config(link);
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break;
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case CS_EVENT_PM_SUSPEND:
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link->state |= DEV_SUSPEND;
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/* Fall through... */
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case CS_EVENT_RESET_PHYSICAL:
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if (link->state & DEV_CONFIG) {
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if (link->open) {
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netif_device_detach(dev);
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}
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pcmcia_release_configuration(link->handle);
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}
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break;
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case CS_EVENT_PM_RESUME:
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link->state &= ~DEV_SUSPEND;
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/* Fall through... */
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case CS_EVENT_CARD_RESET:
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if (link->state & DEV_CONFIG) {
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pcmcia_request_configuration(link->handle, &link->conf);
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if (link->open) {
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int ioaddr = dev->base_addr;
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struct arcnet_local *lp = dev->priv;
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ARCRESET;
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}
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}
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break;
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}
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return 0;
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} /* com20020_event */
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static struct pcmcia_driver com20020_cs_driver = {
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.owner = THIS_MODULE,
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.drv = {
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.name = "com20020_cs",
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},
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.attach = com20020_attach,
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.detach = com20020_detach,
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};
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static int __init init_com20020_cs(void)
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{
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return pcmcia_register_driver(&com20020_cs_driver);
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}
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static void __exit exit_com20020_cs(void)
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{
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pcmcia_unregister_driver(&com20020_cs_driver);
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BUG_ON(dev_list != NULL);
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}
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module_init(init_com20020_cs);
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module_exit(exit_com20020_cs);
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