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1275 |
phoenix |
/* $Id: avm_cs.c,v 1.1.1.1 2004-04-15 02:04:11 phoenix Exp $
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*
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* A PCMCIA client driver for AVM B1/M1/M2
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*
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* Copyright 1999 by Carsten Paeth <calle@calle.de>
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/sched.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/tty.h>
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#include <linux/serial.h>
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#include <linux/major.h>
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#include <asm/io.h>
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#include <asm/system.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/ciscode.h>
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#include <pcmcia/ds.h>
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#include <pcmcia/cisreg.h>
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#include <linux/skbuff.h>
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#include <linux/capi.h>
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#include <linux/b1lli.h>
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#include <linux/b1pcmcia.h>
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/*====================================================================*/
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MODULE_DESCRIPTION("CAPI4Linux: PCMCIA client driver for AVM B1/M1/M2");
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MODULE_AUTHOR("Carsten Paeth");
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MODULE_LICENSE("GPL");
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/*====================================================================*/
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/* Parameters that can be set with 'insmod' */
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/* This means pick from 15, 12, 11, 10, 9, 7, 5, 4, and 3 */
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static int default_irq_list[10] = { 15, 12, 11, 10, 9, 7, 5, 4, 3, -1 };
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static int irq_list[10] = { -1 };
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MODULE_PARM(irq_list, "1-10i");
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/*====================================================================*/
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/*
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The event() function is this driver's Card Services event handler.
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It will be called by Card Services when an appropriate card status
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event is received. The config() and release() entry points are
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used to configure or release a socket, in response to card insertion
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and ejection events. They are invoked from the skeleton event
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handler.
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*/
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static void avmcs_config(dev_link_t *link);
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static void avmcs_release(u_long arg);
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static int avmcs_event(event_t event, int priority,
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event_callback_args_t *args);
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/*
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The attach() and detach() entry points are used to create and destroy
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"instances" of the driver, where each instance represents everything
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needed to manage one actual PCMCIA card.
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*/
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static dev_link_t *avmcs_attach(void);
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static void avmcs_detach(dev_link_t *);
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/*
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The dev_info variable is the "key" that is used to match up this
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device driver with appropriate cards, through the card configuration
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database.
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*/
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static dev_info_t dev_info = "avm_cs";
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/*
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A linked list of "instances" of the skeleton device. Each actual
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PCMCIA card corresponds to one device instance, and is described
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by one dev_link_t structure (defined in ds.h).
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You may not want to use a linked list for this -- for example, the
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memory card driver uses an array of dev_link_t pointers, where minor
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device numbers are used to derive the corresponding array index.
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*/
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static dev_link_t *dev_list = NULL;
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/*
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A dev_link_t structure has fields for most things that are needed
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to keep track of a socket, but there will usually be some device
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specific information that also needs to be kept track of. The
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'priv' pointer in a dev_link_t structure can be used to point to
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a device-specific private data structure, like this.
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A driver needs to provide a dev_node_t structure for each device
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on a card. In some cases, there is only one device per card (for
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example, ethernet cards, modems). In other cases, there may be
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many actual or logical devices (SCSI adapters, memory cards with
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multiple partitions). The dev_node_t structures need to be kept
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in a linked list starting at the 'dev' field of a dev_link_t
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structure. We allocate them in the card's private data structure,
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because they generally can't be allocated dynamically.
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*/
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typedef struct local_info_t {
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dev_node_t node;
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} local_info_t;
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/*====================================================================*/
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static void cs_error(client_handle_t handle, int func, int ret)
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{
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error_info_t err = { func, ret };
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CardServices(ReportError, handle, &err);
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}
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/*======================================================================
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avmcs_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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The dev_link structure is initialized, but we don't actually
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configure the card at this point -- we wait until we receive a
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card insertion event.
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======================================================================*/
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static dev_link_t *avmcs_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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local_info_t *local;
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int ret, i;
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/* Initialize the dev_link_t structure */
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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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memset(link, 0, sizeof(struct dev_link_t));
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link->release.function = &avmcs_release;
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link->release.data = (u_long)link;
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/* The io structure describes IO port mapping */
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link->io.NumPorts1 = 16;
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link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
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link->io.NumPorts2 = 0;
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/* Interrupt setup */
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link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
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link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
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link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
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if (irq_list[0] != -1) {
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for (i = 0; i < 10 && irq_list[i] > 0; i++)
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link->irq.IRQInfo2 |= 1 << irq_list[i];
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} else {
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for (i = 0; i < 10 && default_irq_list[i] > 0; i++)
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link->irq.IRQInfo2 |= 1 << default_irq_list[i];
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}
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/* General socket configuration */
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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.ConfigIndex = 1;
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link->conf.Present = PRESENT_OPTION;
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/* Allocate space for private device-specific data */
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local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
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if (!local)
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return NULL;
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memset(local, 0, sizeof(local_info_t));
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link->priv = local;
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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.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
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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 = &avmcs_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 = CardServices(RegisterClient, &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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avmcs_detach(link);
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return NULL;
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}
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return link;
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} /* avmcs_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 avmcs_detach(dev_link_t *link)
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{
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dev_link_t **linkp;
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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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/*
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230 |
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If the device is currently configured and active, we won't
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actually delete it yet. Instead, it is marked so that when
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232 |
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the release() function is called, that will trigger a proper
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detach().
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*/
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235 |
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if (link->state & DEV_CONFIG) {
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link->state |= DEV_STALE_LINK;
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return;
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}
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/* Break the link with Card Services */
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if (link->handle)
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CardServices(DeregisterClient, link->handle);
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/* Unlink device structure, free pieces */
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*linkp = link->next;
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if (link->priv) {
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247 |
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kfree(link->priv);
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248 |
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}
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249 |
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kfree(link);
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250 |
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251 |
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} /* avmcs_detach */
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252 |
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253 |
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/*======================================================================
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254 |
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255 |
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avmcs_config() is scheduled to run after a CARD_INSERTION event
|
256 |
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is received, to configure the PCMCIA socket, and to make the
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257 |
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ethernet device available to the system.
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258 |
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|
259 |
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======================================================================*/
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260 |
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261 |
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static int get_tuple(int fn, client_handle_t handle, tuple_t *tuple,
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262 |
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cisparse_t *parse)
|
263 |
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{
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264 |
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int i;
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265 |
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i = CardServices(fn, handle, tuple);
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266 |
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if (i != CS_SUCCESS) return i;
|
267 |
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i = CardServices(GetTupleData, handle, tuple);
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268 |
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if (i != CS_SUCCESS) return i;
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269 |
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return CardServices(ParseTuple, handle, tuple, parse);
|
270 |
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}
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271 |
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272 |
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#define first_tuple(a, b, c) get_tuple(GetFirstTuple, a, b, c)
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273 |
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#define next_tuple(a, b, c) get_tuple(GetNextTuple, a, b, c)
|
274 |
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|
275 |
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static void avmcs_config(dev_link_t *link)
|
276 |
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{
|
277 |
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client_handle_t handle;
|
278 |
|
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tuple_t tuple;
|
279 |
|
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cisparse_t parse;
|
280 |
|
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cistpl_cftable_entry_t *cf = &parse.cftable_entry;
|
281 |
|
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local_info_t *dev;
|
282 |
|
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int i;
|
283 |
|
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u_char buf[64];
|
284 |
|
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char devname[128];
|
285 |
|
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int cardtype;
|
286 |
|
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int (*addcard)(unsigned int port, unsigned irq);
|
287 |
|
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|
288 |
|
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handle = link->handle;
|
289 |
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dev = link->priv;
|
290 |
|
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|
291 |
|
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/*
|
292 |
|
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This reads the card's CONFIG tuple to find its configuration
|
293 |
|
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registers.
|
294 |
|
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*/
|
295 |
|
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do {
|
296 |
|
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tuple.DesiredTuple = CISTPL_CONFIG;
|
297 |
|
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i = CardServices(GetFirstTuple, handle, &tuple);
|
298 |
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if (i != CS_SUCCESS) break;
|
299 |
|
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tuple.TupleData = buf;
|
300 |
|
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tuple.TupleDataMax = 64;
|
301 |
|
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tuple.TupleOffset = 0;
|
302 |
|
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i = CardServices(GetTupleData, handle, &tuple);
|
303 |
|
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if (i != CS_SUCCESS) break;
|
304 |
|
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i = CardServices(ParseTuple, handle, &tuple, &parse);
|
305 |
|
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if (i != CS_SUCCESS) break;
|
306 |
|
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link->conf.ConfigBase = parse.config.base;
|
307 |
|
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} while (0);
|
308 |
|
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if (i != CS_SUCCESS) {
|
309 |
|
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cs_error(link->handle, ParseTuple, i);
|
310 |
|
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link->state &= ~DEV_CONFIG_PENDING;
|
311 |
|
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return;
|
312 |
|
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}
|
313 |
|
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|
314 |
|
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/* Configure card */
|
315 |
|
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link->state |= DEV_CONFIG;
|
316 |
|
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|
317 |
|
|
do {
|
318 |
|
|
|
319 |
|
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tuple.Attributes = 0;
|
320 |
|
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tuple.TupleData = buf;
|
321 |
|
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tuple.TupleDataMax = 254;
|
322 |
|
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tuple.TupleOffset = 0;
|
323 |
|
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tuple.DesiredTuple = CISTPL_VERS_1;
|
324 |
|
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|
325 |
|
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devname[0] = 0;
|
326 |
|
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if( !first_tuple(handle, &tuple, &parse) && parse.version_1.ns > 1 ) {
|
327 |
|
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strncpy(devname,parse.version_1.str + parse.version_1.ofs[1],
|
328 |
|
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sizeof(devname));
|
329 |
|
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}
|
330 |
|
|
/*
|
331 |
|
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* find IO port
|
332 |
|
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*/
|
333 |
|
|
tuple.TupleData = (cisdata_t *)buf;
|
334 |
|
|
tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
|
335 |
|
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tuple.Attributes = 0;
|
336 |
|
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tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
|
337 |
|
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i = first_tuple(handle, &tuple, &parse);
|
338 |
|
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while (i == CS_SUCCESS) {
|
339 |
|
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if (cf->io.nwin > 0) {
|
340 |
|
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link->conf.ConfigIndex = cf->index;
|
341 |
|
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link->io.BasePort1 = cf->io.win[0].base;
|
342 |
|
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link->io.NumPorts1 = cf->io.win[0].len;
|
343 |
|
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link->io.NumPorts2 = 0;
|
344 |
|
|
printk(KERN_INFO "avm_cs: testing i/o %#x-%#x\n",
|
345 |
|
|
link->io.BasePort1,
|
346 |
|
|
link->io.BasePort1+link->io.NumPorts1-1);
|
347 |
|
|
i = CardServices(RequestIO, link->handle, &link->io);
|
348 |
|
|
if (i == CS_SUCCESS) goto found_port;
|
349 |
|
|
}
|
350 |
|
|
i = next_tuple(handle, &tuple, &parse);
|
351 |
|
|
}
|
352 |
|
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|
353 |
|
|
found_port:
|
354 |
|
|
if (i != CS_SUCCESS) {
|
355 |
|
|
cs_error(link->handle, RequestIO, i);
|
356 |
|
|
break;
|
357 |
|
|
}
|
358 |
|
|
|
359 |
|
|
/*
|
360 |
|
|
* allocate an interrupt line
|
361 |
|
|
*/
|
362 |
|
|
i = CardServices(RequestIRQ, link->handle, &link->irq);
|
363 |
|
|
if (i != CS_SUCCESS) {
|
364 |
|
|
cs_error(link->handle, RequestIRQ, i);
|
365 |
|
|
CardServices(ReleaseIO, link->handle, &link->io);
|
366 |
|
|
break;
|
367 |
|
|
}
|
368 |
|
|
|
369 |
|
|
/*
|
370 |
|
|
* configure the PCMCIA socket
|
371 |
|
|
*/
|
372 |
|
|
i = CardServices(RequestConfiguration, link->handle, &link->conf);
|
373 |
|
|
if (i != CS_SUCCESS) {
|
374 |
|
|
cs_error(link->handle, RequestConfiguration, i);
|
375 |
|
|
CardServices(ReleaseIO, link->handle, &link->io);
|
376 |
|
|
CardServices(ReleaseIRQ, link->handle, &link->irq);
|
377 |
|
|
break;
|
378 |
|
|
}
|
379 |
|
|
|
380 |
|
|
} while (0);
|
381 |
|
|
|
382 |
|
|
/* At this point, the dev_node_t structure(s) should be
|
383 |
|
|
initialized and arranged in a linked list at link->dev. */
|
384 |
|
|
|
385 |
|
|
if (devname[0]) {
|
386 |
|
|
char *s = strrchr(devname, ' ');
|
387 |
|
|
if (!s)
|
388 |
|
|
s = devname;
|
389 |
|
|
else s++;
|
390 |
|
|
strcpy(dev->node.dev_name, s);
|
391 |
|
|
if (strcmp("M1", s) == 0) {
|
392 |
|
|
cardtype = AVM_CARDTYPE_M1;
|
393 |
|
|
} else if (strcmp("M2", s) == 0) {
|
394 |
|
|
cardtype = AVM_CARDTYPE_M2;
|
395 |
|
|
} else {
|
396 |
|
|
cardtype = AVM_CARDTYPE_B1;
|
397 |
|
|
}
|
398 |
|
|
} else {
|
399 |
|
|
strcpy(dev->node.dev_name, "b1");
|
400 |
|
|
cardtype = AVM_CARDTYPE_B1;
|
401 |
|
|
}
|
402 |
|
|
|
403 |
|
|
dev->node.major = 64;
|
404 |
|
|
dev->node.minor = 0;
|
405 |
|
|
link->dev = &dev->node;
|
406 |
|
|
|
407 |
|
|
link->state &= ~DEV_CONFIG_PENDING;
|
408 |
|
|
/* If any step failed, release any partially configured state */
|
409 |
|
|
if (i != 0) {
|
410 |
|
|
avmcs_release((u_long)link);
|
411 |
|
|
return;
|
412 |
|
|
}
|
413 |
|
|
|
414 |
|
|
|
415 |
|
|
switch (cardtype) {
|
416 |
|
|
case AVM_CARDTYPE_M1: addcard = b1pcmcia_addcard_m1; break;
|
417 |
|
|
case AVM_CARDTYPE_M2: addcard = b1pcmcia_addcard_m2; break;
|
418 |
|
|
default:
|
419 |
|
|
case AVM_CARDTYPE_B1: addcard = b1pcmcia_addcard_b1; break;
|
420 |
|
|
}
|
421 |
|
|
if ((i = (*addcard)(link->io.BasePort1, link->irq.AssignedIRQ)) < 0) {
|
422 |
|
|
printk(KERN_ERR "avm_cs: failed to add AVM-%s-Controller at i/o %#x, irq %d\n",
|
423 |
|
|
dev->node.dev_name, link->io.BasePort1, link->irq.AssignedIRQ);
|
424 |
|
|
avmcs_release((u_long)link);
|
425 |
|
|
return;
|
426 |
|
|
}
|
427 |
|
|
dev->node.minor = i;
|
428 |
|
|
|
429 |
|
|
} /* avmcs_config */
|
430 |
|
|
|
431 |
|
|
/*======================================================================
|
432 |
|
|
|
433 |
|
|
After a card is removed, avmcs_release() will unregister the net
|
434 |
|
|
device, and release the PCMCIA configuration. If the device is
|
435 |
|
|
still open, this will be postponed until it is closed.
|
436 |
|
|
|
437 |
|
|
======================================================================*/
|
438 |
|
|
|
439 |
|
|
static void avmcs_release(u_long arg)
|
440 |
|
|
{
|
441 |
|
|
dev_link_t *link = (dev_link_t *)arg;
|
442 |
|
|
|
443 |
|
|
/*
|
444 |
|
|
If the device is currently in use, we won't release until it
|
445 |
|
|
is actually closed.
|
446 |
|
|
*/
|
447 |
|
|
if (link->open) {
|
448 |
|
|
link->state |= DEV_STALE_CONFIG;
|
449 |
|
|
return;
|
450 |
|
|
}
|
451 |
|
|
|
452 |
|
|
b1pcmcia_delcard(link->io.BasePort1, link->irq.AssignedIRQ);
|
453 |
|
|
|
454 |
|
|
/* Unlink the device chain */
|
455 |
|
|
link->dev = NULL;
|
456 |
|
|
|
457 |
|
|
/* Don't bother checking to see if these succeed or not */
|
458 |
|
|
CardServices(ReleaseConfiguration, link->handle);
|
459 |
|
|
CardServices(ReleaseIO, link->handle, &link->io);
|
460 |
|
|
CardServices(ReleaseIRQ, link->handle, &link->irq);
|
461 |
|
|
link->state &= ~DEV_CONFIG;
|
462 |
|
|
|
463 |
|
|
if (link->state & DEV_STALE_LINK)
|
464 |
|
|
avmcs_detach(link);
|
465 |
|
|
|
466 |
|
|
} /* avmcs_release */
|
467 |
|
|
|
468 |
|
|
/*======================================================================
|
469 |
|
|
|
470 |
|
|
The card status event handler. Mostly, this schedules other
|
471 |
|
|
stuff to run after an event is received. A CARD_REMOVAL event
|
472 |
|
|
also sets some flags to discourage the net drivers from trying
|
473 |
|
|
to talk to the card any more.
|
474 |
|
|
|
475 |
|
|
When a CARD_REMOVAL event is received, we immediately set a flag
|
476 |
|
|
to block future accesses to this device. All the functions that
|
477 |
|
|
actually access the device should check this flag to make sure
|
478 |
|
|
the card is still present.
|
479 |
|
|
|
480 |
|
|
======================================================================*/
|
481 |
|
|
|
482 |
|
|
static int avmcs_event(event_t event, int priority,
|
483 |
|
|
event_callback_args_t *args)
|
484 |
|
|
{
|
485 |
|
|
dev_link_t *link = args->client_data;
|
486 |
|
|
|
487 |
|
|
switch (event) {
|
488 |
|
|
case CS_EVENT_CARD_REMOVAL:
|
489 |
|
|
link->state &= ~DEV_PRESENT;
|
490 |
|
|
if (link->state & DEV_CONFIG) {
|
491 |
|
|
link->release.expires = jiffies + (HZ/20);
|
492 |
|
|
add_timer(&link->release);
|
493 |
|
|
}
|
494 |
|
|
break;
|
495 |
|
|
case CS_EVENT_CARD_INSERTION:
|
496 |
|
|
link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
|
497 |
|
|
avmcs_config(link);
|
498 |
|
|
break;
|
499 |
|
|
case CS_EVENT_PM_SUSPEND:
|
500 |
|
|
link->state |= DEV_SUSPEND;
|
501 |
|
|
/* Fall through... */
|
502 |
|
|
case CS_EVENT_RESET_PHYSICAL:
|
503 |
|
|
if (link->state & DEV_CONFIG)
|
504 |
|
|
CardServices(ReleaseConfiguration, link->handle);
|
505 |
|
|
break;
|
506 |
|
|
case CS_EVENT_PM_RESUME:
|
507 |
|
|
link->state &= ~DEV_SUSPEND;
|
508 |
|
|
/* Fall through... */
|
509 |
|
|
case CS_EVENT_CARD_RESET:
|
510 |
|
|
if (link->state & DEV_CONFIG)
|
511 |
|
|
CardServices(RequestConfiguration, link->handle, &link->conf);
|
512 |
|
|
break;
|
513 |
|
|
}
|
514 |
|
|
return 0;
|
515 |
|
|
} /* avmcs_event */
|
516 |
|
|
|
517 |
|
|
/*====================================================================*/
|
518 |
|
|
|
519 |
|
|
static int __init avmcs_init(void)
|
520 |
|
|
{
|
521 |
|
|
servinfo_t serv;
|
522 |
|
|
CardServices(GetCardServicesInfo, &serv);
|
523 |
|
|
if (serv.Revision != CS_RELEASE_CODE) {
|
524 |
|
|
printk(KERN_NOTICE "avm_cs: Card Services release "
|
525 |
|
|
"does not match!\n");
|
526 |
|
|
return -1;
|
527 |
|
|
}
|
528 |
|
|
register_pccard_driver(&dev_info, &avmcs_attach, &avmcs_detach);
|
529 |
|
|
return 0;
|
530 |
|
|
}
|
531 |
|
|
|
532 |
|
|
static void __exit avmcs_exit(void)
|
533 |
|
|
{
|
534 |
|
|
unregister_pccard_driver(&dev_info);
|
535 |
|
|
while (dev_list != NULL) {
|
536 |
|
|
if (dev_list->state & DEV_CONFIG)
|
537 |
|
|
avmcs_release((u_long)dev_list);
|
538 |
|
|
avmcs_detach(dev_list);
|
539 |
|
|
}
|
540 |
|
|
}
|
541 |
|
|
|
542 |
|
|
module_init(avmcs_init);
|
543 |
|
|
module_exit(avmcs_exit);
|