/*====================================================================== A driver for PCMCIA parallel port adapters (specifically, for the Quatech SPP-100 EPP card: other cards will probably require driver tweaks) parport_cs.c 1.7 1999/07/20 16:00:01 The contents of this file are subject to the Mozilla Public License Version 1.1 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.mozilla.org/MPL/ Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. The initial developer of the original code is David A. Hinds . Portions created by David A. Hinds are Copyright (C) 1998 David A. Hinds. All Rights Reserved. ======================================================================*/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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 = "ide_cs.c 1.7 1999/07/20 16:00:01 (David Hinds)"; #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 }; static int epp_mode = 1; MODULE_PARM(irq_mask, "i"); MODULE_PARM(irq_list, "1-4i"); MODULE_PARM(epp_mode, "i"); /*====================================================================*/ #define FORCE_EPP_MODE 0x08 typedef struct parport_info_t { int ndev; dev_node_t node; struct parport *port; } parport_info_t; static dev_link_t *parport_attach(void); static void parport_detach(dev_link_t *); static void parport_config(dev_link_t *link); static void parport_cs_release(u_long arg); static int parport_event(event_t event, int priority, event_callback_args_t *args); static dev_info_t dev_info = "parport_cs"; static dev_link_t *dev_list = NULL; extern struct parport_operations parport_pc_ops; static struct parport_operations parport_cs_ops; /*====================================================================*/ static void cs_error(client_handle_t handle, int func, int ret) { error_info_t err = { func, ret }; CardServices(ReportError, handle, &err); } /*====================================================================== parport_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 *parport_attach(void) { client_reg_t client_reg; dev_link_t *link; int i, ret; DEBUG(0, "parport_attach()\n"); /* Create new parport device */ link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL); memset(link, 0, sizeof(struct dev_link_t)); link->release.function = &parport_cs_release; link->release.data = (u_long)link; link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; link->io.Attributes2 = IO_DATA_PATH_WIDTH_8; link->io.IOAddrLines = 3; link->irq.Attributes = IRQ_TYPE_EXCLUSIVE; 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->conf.Attributes = CONF_ENABLE_IRQ; link->conf.Vcc = 50; link->conf.IntType = INT_MEMORY_AND_IO; link->priv = kmalloc(sizeof(struct parport_info_t), GFP_KERNEL); memset(link->priv, 0, sizeof(struct parport_info_t)); /* 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 = &parport_event; client_reg.Version = 0x0210; client_reg.event_callback_args.client_data = link; ret = CardServices(RegisterClient, &link->handle, &client_reg); if (ret != CS_SUCCESS) { cs_error(link->handle, RegisterClient, ret); parport_detach(link); return NULL; } return link; } /* parport_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 parport_detach(dev_link_t *link) { dev_link_t **linkp; long flags; int ret; DEBUG(0, "parport_detach(0x%p)\n", link); /* Locate device structure */ for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next) if (*linkp == link) break; if (*linkp == NULL) return; save_flags(flags); cli(); if (link->state & DEV_RELEASE_PENDING) { del_timer(&link->release); link->state &= ~DEV_RELEASE_PENDING; } restore_flags(flags); if (link->state & DEV_CONFIG) parport_cs_release((u_long)link); if (link->handle) { ret = CardServices(DeregisterClient, link->handle); if (ret != CS_SUCCESS) cs_error(link->handle, DeregisterClient, ret); } /* Unlink device structure, free bits */ *linkp = link->next; kfree_s(link->priv, sizeof(parport_info_t)); kfree_s(link, sizeof(struct dev_link_t)); } /* parport_detach */ /*====================================================================== parport_config() is scheduled to run after a CARD_INSERTION event is received, to configure the PCMCIA socket, and to make the parport device available to the system. ======================================================================*/ #define CS_CHECK(fn, args...) \ while ((last_ret=CardServices(last_fn=(fn), args))!=0) goto cs_failed #define CFG_CHECK(fn, args...) \ if (CardServices(fn, args) != 0) goto next_entry static struct { u_int flag; char *name; } mode[] = { { PARPORT_MODE_PCPS2, "PS2" }, { PARPORT_MODE_PCEPP, "EPP" }, { PARPORT_MODE_PCECP, "ECP" }, { PARPORT_MODE_PCECPEPP, "ECPEPP" }, { PARPORT_MODE_PCECPPS2, "ECPPS2" } }; void parport_config(dev_link_t *link) { client_handle_t handle; parport_info_t *info; tuple_t tuple; u_short buf[128]; cisparse_t parse; config_info_t conf; cistpl_cftable_entry_t *cfg = &parse.cftable_entry; cistpl_cftable_entry_t dflt = { 0 }; struct parport *p; int i, last_ret, last_fn; handle = link->handle; info = link->priv; DEBUG(0, "parport_config(0x%p)\n", link); tuple.TupleData = (cisdata_t *)buf; tuple.TupleOffset = 0; tuple.TupleDataMax = 255; tuple.Attributes = 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; link->conf.Present = parse.config.rmask[0]; /* Configure card */ link->state |= DEV_CONFIG; /* Not sure if this is right... look up the current Vcc */ CS_CHECK(GetConfigurationInfo, handle, &conf); tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; tuple.Attributes = 0; CS_CHECK(GetFirstTuple, handle, &tuple); while (1) { CFG_CHECK(GetTupleData, handle, &tuple); CFG_CHECK(ParseTuple, handle, &tuple, &parse); if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) { cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io; link->conf.ConfigIndex = cfg->index; if (epp_mode) link->conf.ConfigIndex |= FORCE_EPP_MODE; link->io.BasePort1 = io->win[0].base; link->io.NumPorts1 = io->win[0].len; if (io->nwin == 2) { link->io.BasePort2 = io->win[1].base; link->io.NumPorts2 = io->win[1].len; } CFG_CHECK(RequestIO, link->handle, &link->io); /* If we've got this far, we're done */ break; } next_entry: if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg; CS_CHECK(GetNextTuple, handle, &tuple); } CS_CHECK(RequestIRQ, handle, &link->irq); CS_CHECK(RequestConfiguration, handle, &link->conf); p = parport_register_port(link->io.BasePort1, link->irq.AssignedIRQ, PARPORT_DMA_NONE, &parport_cs_ops); if (p == NULL) { printk(KERN_NOTICE "parport_cs: parport_register_port() at " "0x%3x, irq %u failed\n", link->io.BasePort1, link->irq.AssignedIRQ); goto failed; } #if (LINUX_VERSION_CODE >= VERSION(2,2,8)) p->private_data = kmalloc(sizeof(struct parport_pc_private), GFP_KERNEL); ((struct parport_pc_private *)(p->private_data))->ctr = 0x0c; #endif parport_proc_register(p); p->flags |= PARPORT_FLAG_COMA; parport_pc_write_econtrol(p, 0x00); parport_pc_write_control(p, 0x0c); parport_pc_write_data(p, 0x00); p->modes |= PARPORT_MODE_PCSPP; if (epp_mode) p->modes |= PARPORT_MODE_PCPS2 | PARPORT_MODE_PCEPP; if (link->io.NumPorts2) p->modes |= PARPORT_MODE_PCECR; info->ndev = 1; info->node.major = LP_MAJOR; info->node.minor = p->number; info->port = p; strcpy(info->node.dev_name, p->name); link->dev = &info->node; printk(KERN_INFO "%s: PC-style PCMCIA at %#x", p->name, link->io.BasePort1); if (link->io.NumPorts2) printk(" & %#x", link->io.BasePort2); printk(", irq %u [SPP", link->irq.AssignedIRQ); for (i = 0; i < 5; i++) if (p->modes & mode[i].flag) printk(",%s", mode[i].name); printk("]\n"); link->state &= ~DEV_CONFIG_PENDING; return; cs_failed: cs_error(link->handle, last_fn, last_ret); failed: parport_cs_release((u_long)link); } /* parport_config */ /*====================================================================== After a card is removed, parport_cs_release() will unregister the device, and release the PCMCIA configuration. If the device is still open, this will be postponed until it is closed. ======================================================================*/ void parport_cs_release(u_long arg) { dev_link_t *link = (dev_link_t *)arg; parport_info_t *info = link->priv; DEBUG(0, "parport_release(0x%p)\n", link); if (info->ndev) { struct parport *p = info->port; if (!(p->flags & PARPORT_FLAG_COMA)) parport_quiesce(p); parport_proc_unregister(p); #if (LINUX_VERSION_CODE >= VERSION(2,2,8)) kfree(p->private_data); #endif parport_unregister_port(p); } info->ndev = 0; link->dev = NULL; CardServices(ReleaseConfiguration, link->handle); CardServices(ReleaseIO, link->handle, &link->io); CardServices(ReleaseIRQ, link->handle, &link->irq); link->state &= ~DEV_CONFIG; } /* parport_cs_release */ /*====================================================================== The card status event handler. Mostly, this schedules other stuff to run after an event is received. ======================================================================*/ int parport_event(event_t event, int priority, event_callback_args_t *args) { dev_link_t *link = args->client_data; DEBUG(1, "parport_event(0x%06x)\n", event); switch (event) { case CS_EVENT_CARD_REMOVAL: link->state &= ~DEV_PRESENT; if (link->state & DEV_CONFIG) { link->release.expires = RUN_AT(HZ/20); link->state |= DEV_RELEASE_PENDING; add_timer(&link->release); } break; case CS_EVENT_CARD_INSERTION: link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; parport_config(link); break; case CS_EVENT_PM_SUSPEND: link->state |= DEV_SUSPEND; /* Fall through... */ case CS_EVENT_RESET_PHYSICAL: if (link->state & DEV_CONFIG) CardServices(ReleaseConfiguration, link->handle); break; case CS_EVENT_PM_RESUME: link->state &= ~DEV_SUSPEND; /* Fall through... */ case CS_EVENT_CARD_RESET: if (DEV_OK(link)) CardServices(RequestConfiguration, link->handle, &link->conf); break; } return 0; } /* parport_event */ /*====================================================================*/ static void inc_use_count(void) { MOD_INC_USE_COUNT; parport_pc_ops.inc_use_count(); } static void dec_use_count(void) { MOD_DEC_USE_COUNT; parport_pc_ops.dec_use_count(); } /*====================================================================*/ int init_module(void) { servinfo_t serv; DEBUG(0, "%s\n", version); CardServices(GetCardServicesInfo, &serv); if (serv.Revision != CS_RELEASE_CODE) { printk(KERN_NOTICE "parport_cs: Card Services release " "does not match!\n"); return -1; } /* This is to protect against unloading modules out of order */ parport_cs_ops = parport_pc_ops; parport_cs_ops.inc_use_count = &inc_use_count; parport_cs_ops.dec_use_count = &dec_use_count; register_pcmcia_driver(&dev_info, &parport_attach, &parport_detach); return 0; } void cleanup_module(void) { DEBUG(0, "parport_cs: unloading\n"); unregister_pcmcia_driver(&dev_info); while (dev_list != NULL) parport_detach(dev_list); }