/*====================================================================== A driver for PCMCIA serial devices serial_cs.c 1.106 1999/07/20 16:00:02 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 #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 = "serial_cs.c 1.106 1999/07/20 16:00:02 (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 }; /* Enable the speaker? */ static int do_sound = 1; MODULE_PARM(irq_mask, "i"); MODULE_PARM(irq_list, "1-4i"); MODULE_PARM(do_sound, "i"); /*====================================================================*/ /* Table of multi-port card ID's */ typedef struct { u_short manfid; u_short prodid; int multi; /* 1 = multifunction, > 1 = # ports */ } multi_id_t; static multi_id_t multi_id[] = { { MANFID_OMEGA, PRODID_OMEGA_QSP_100, 4 }, { MANFID_QUATECH, PRODID_QUATECH_DUAL_RS232, 2 }, { MANFID_QUATECH, PRODID_QUATECH_DUAL_RS232_D1, 2 }, { MANFID_QUATECH, PRODID_QUATECH_QUAD_RS232, 4 }, { MANFID_SOCKET, PRODID_SOCKET_DUAL_RS232, 2 }, { MANFID_INTEL, PRODID_INTEL_DUAL_RS232, 2 }, { MANFID_NATINST, PRODID_NATINST_QUAD_RS232, 4 } }; #define MULTI_COUNT (sizeof(multi_id)/sizeof(multi_id_t)) typedef struct serial_info_t { int ndev; int multi; int slave; int manfid; dev_node_t node[4]; int line[4]; } serial_info_t; static void serial_config(dev_link_t *link); static void serial_release(u_long arg); static int serial_event(event_t event, int priority, event_callback_args_t *args); static dev_info_t dev_info = "serial_cs"; static dev_link_t *serial_attach(void); static void serial_detach(dev_link_t *); static dev_link_t *dev_list = NULL; /*====================================================================*/ static void cs_error(client_handle_t handle, int func, int ret) { error_info_t err = { func, ret }; CardServices(ReportError, handle, &err); } /*====================================================================== serial_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 *serial_attach(void) { client_reg_t client_reg; dev_link_t *link; int i, ret; DEBUG(0, "serial_attach()\n"); /* Create new serial device */ link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL); memset(link, 0, sizeof(struct dev_link_t)); link->release.function = &serial_release; link->release.data = (u_long)link; link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; link->io.NumPorts1 = 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; if (do_sound) { link->conf.Attributes |= CONF_ENABLE_SPKR; link->conf.Status = CCSR_AUDIO_ENA; } link->conf.IntType = INT_MEMORY_AND_IO; link->priv = kmalloc(sizeof(struct serial_info_t), GFP_KERNEL); memset(link->priv, 0, sizeof(struct serial_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 = &serial_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); serial_detach(link); return NULL; } return link; } /* serial_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 serial_detach(dev_link_t *link) { dev_link_t **linkp; long flags; int ret; DEBUG(0, "serial_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) serial_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(serial_info_t)); kfree_s(link, sizeof(struct dev_link_t)); } /* serial_detach */ /*====================================================================*/ static int setup_serial(serial_info_t *info, ioaddr_t port, int irq) { struct serial_struct serial; int line; serial.port = port; serial.irq = irq; serial.flags = ASYNC_SKIP_TEST; serial.flags |= (info->multi || info->slave) ? ASYNC_SHARE_IRQ : 0; line = register_serial(&serial); if (line < 0) { printk(KERN_NOTICE "serial_cs: register_serial() at 0x%04x, " "irq %d failed\n", serial.port, serial.irq); return -1; } info->line[info->ndev] = line; sprintf(info->node[info->ndev].dev_name, "ttyS%d", line); info->node[info->ndev].major = TTY_MAJOR; info->node[info->ndev].minor = 0x40+line; if (info->ndev > 0) info->node[info->ndev-1].next = &info->node[info->ndev]; info->ndev++; return 0; } /*====================================================================*/ static int get_tuple(int fn, client_handle_t handle, tuple_t *tuple, cisparse_t *parse) { int i; i = CardServices(fn, handle, tuple); if (i != CS_SUCCESS) return CS_NO_MORE_ITEMS; i = CardServices(GetTupleData, handle, tuple); if (i != CS_SUCCESS) return i; return CardServices(ParseTuple, handle, tuple, parse); } #define first_tuple(a, b, c) get_tuple(GetFirstTuple, a, b, c) #define next_tuple(a, b, c) get_tuple(GetNextTuple, a, b, c) /*====================================================================*/ static int simple_config(dev_link_t *link) { static ioaddr_t base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 }; client_handle_t handle = link->handle; serial_info_t *info = link->priv; tuple_t tuple; u_char buf[256]; cisparse_t parse; cistpl_cftable_entry_t *cf = &parse.cftable_entry; config_info_t config; int i, j; /* If the card is already configured, look up the port and irq */ i = CardServices(GetConfigurationInfo, handle, &config); if ((i == CS_SUCCESS) && (config.Attributes & CONF_VALID_CLIENT)) { ioaddr_t port = 0; if ((config.BasePort2 != 0) && (config.NumPorts2 == 8)) { port = config.BasePort2; info->slave = 1; } else if ((info->manfid == MANFID_OSITECH) && (config.NumPorts1 == 0x40)) { port = config.BasePort1 + 0x28; info->slave = 1; } if (info->slave) return setup_serial(info, port, config.AssignedIRQ); } link->conf.Vcc = config.Vcc; /* First pass: look for a config entry that looks normal. */ tuple.TupleData = (cisdata_t *)buf; tuple.TupleOffset = 0; tuple.TupleDataMax = 255; tuple.Attributes = 0; tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; i = first_tuple(handle, &tuple, &parse); while (i != CS_NO_MORE_ITEMS) { if (i != CS_SUCCESS) goto next_entry; if (cf->vpp1.present & (1<conf.Vpp1 = link->conf.Vpp2 = cf->vpp1.param[CISTPL_POWER_VNOM]/10000; if ((cf->io.nwin > 0) && ((cf->io.win[0].base & 0xf) == 8)) { link->conf.ConfigIndex = cf->index; link->io.BasePort1 = cf->io.win[0].base; i = CardServices(RequestIO, link->handle, &link->io); if (i == CS_SUCCESS) goto found_port; } next_entry: i = next_tuple(handle, &tuple, &parse); } /* Second pass: try to find an entry that isn't picky about its base address, then try to grab any standard serial port address, and finally try to get any free port. */ i = first_tuple(handle, &tuple, &parse); while (i != CS_NO_MORE_ITEMS) { if ((i == CS_SUCCESS) && (cf->io.nwin > 0) && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) { link->conf.ConfigIndex = cf->index; for (j = 0; j < 5; j++) { link->io.BasePort1 = base[j]; i = CardServices(RequestIO, link->handle, &link->io); if (i == CS_SUCCESS) goto found_port; } } i = next_tuple(handle, &tuple, &parse); } found_port: if (i != CS_SUCCESS) { cs_error(link->handle, RequestIO, i); return -1; } i = CardServices(RequestIRQ, link->handle, &link->irq); if (i != CS_SUCCESS) { cs_error(link->handle, RequestIRQ, i); link->irq.AssignedIRQ = 0; } if (info->multi && (info->manfid == MANFID_3COM)) link->conf.ConfigIndex &= ~(0x08); i = CardServices(RequestConfiguration, link->handle, &link->conf); if (i != CS_SUCCESS) { cs_error(link->handle, RequestConfiguration, i); return -1; } return setup_serial(info, link->io.BasePort1, link->irq.AssignedIRQ); } static int multi_config(dev_link_t *link) { client_handle_t handle = link->handle; serial_info_t *info = link->priv; tuple_t tuple; u_char buf[256]; cisparse_t parse; cistpl_cftable_entry_t *cf = &parse.cftable_entry; int i, base2 = 0; tuple.TupleData = (cisdata_t *)buf; tuple.TupleOffset = 0; tuple.TupleDataMax = 255; tuple.Attributes = 0; tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; /* First, look for a generic full-sized window */ link->io.NumPorts1 = info->multi * 8; i = first_tuple(handle, &tuple, &parse); while (i != CS_NO_MORE_ITEMS) { /* The quad port cards have bad CIS's, so just look for a window larger than 8 ports and assume it will be right */ if ((i == CS_SUCCESS) && (cf->io.nwin == 1) && (cf->io.win[0].len > 8)) { link->conf.ConfigIndex = cf->index; link->io.BasePort1 = cf->io.win[0].base; i = CardServices(RequestIO, link->handle, &link->io); base2 = link->io.BasePort1 + 8; if (i == CS_SUCCESS) break; } i = next_tuple(handle, &tuple, &parse); } /* If that didn't work, look for two windows */ if (i != CS_SUCCESS) { link->io.NumPorts1 = link->io.NumPorts2 = 8; info->multi = 2; i = first_tuple(handle, &tuple, &parse); while (i != CS_NO_MORE_ITEMS) { if ((i == CS_SUCCESS) && (cf->io.nwin == 2)) { link->conf.ConfigIndex = cf->index; link->io.BasePort1 = cf->io.win[0].base; link->io.BasePort2 = cf->io.win[1].base; i = CardServices(RequestIO, link->handle, &link->io); base2 = link->io.BasePort2; if (i == CS_SUCCESS) break; } i = next_tuple(handle, &tuple, &parse); } } if (i != CS_SUCCESS) { cs_error(link->handle, RequestIO, i); return -1; } i = CardServices(RequestIRQ, link->handle, &link->irq); if (i != CS_SUCCESS) { cs_error(link->handle, RequestIRQ, i); link->irq.AssignedIRQ = 0; } /* Socket Dual IO: this enables irq's for second port */ if (info->multi && (info->manfid == MANFID_SOCKET)) { link->conf.Present |= PRESENT_EXT_STATUS; link->conf.ExtStatus = ESR_REQ_ATTN_ENA; } i = CardServices(RequestConfiguration, link->handle, &link->conf); if (i != CS_SUCCESS) { cs_error(link->handle, RequestConfiguration, i); return -1; } setup_serial(info, link->io.BasePort1, link->irq.AssignedIRQ); for (i = 0; i < info->multi-1; i++) setup_serial(info, base2+(8*i), link->irq.AssignedIRQ); return 0; } /*====================================================================== serial_config() is scheduled to run after a CARD_INSERTION event is received, to configure the PCMCIA socket, and to make the serial device available to the system. ======================================================================*/ #define CS_CHECK(fn, args...) \ while ((last_ret=CardServices(last_fn=(fn), args))!=0) goto cs_failed void serial_config(dev_link_t *link) { client_handle_t handle; serial_info_t *info; tuple_t tuple; u_short buf[128]; cisparse_t parse; cistpl_cftable_entry_t *cf = &parse.cftable_entry; int i, last_ret, last_fn; sti(); handle = link->handle; info = link->priv; DEBUG(0, "serial_config(0x%p)\n", link); tuple.TupleData = (cisdata_t *)buf; tuple.TupleOffset = 0; tuple.TupleDataMax = 255; tuple.Attributes = 0; /* Get configuration register information */ tuple.DesiredTuple = CISTPL_CONFIG; last_ret = first_tuple(handle, &tuple, &parse); if (last_ret != CS_SUCCESS) { last_fn = ParseTuple; goto cs_failed; } link->conf.ConfigBase = parse.config.base; link->conf.Present = parse.config.rmask[0]; /* Configure card */ link->state |= DEV_CONFIG; /* Is this a compliant multifunction card? */ tuple.DesiredTuple = CISTPL_LONGLINK_MFC; tuple.Attributes = TUPLE_RETURN_COMMON | TUPLE_RETURN_LINK; info->multi = (first_tuple(handle, &tuple, &parse) == CS_SUCCESS); /* Is this a multiport card? */ tuple.DesiredTuple = CISTPL_MANFID; if (first_tuple(handle, &tuple, &parse) == CS_SUCCESS) { info->manfid = le16_to_cpu(buf[0]); for (i = 0; i < MULTI_COUNT; i++) if ((info->manfid == multi_id[i].manfid) && (le16_to_cpu(buf[1]) == multi_id[i].prodid)) break; if (i < MULTI_COUNT) info->multi = multi_id[i].multi; } /* Another check for dual-serial cards: look for either serial or multifunction cards that ask for appropriate IO port ranges */ tuple.DesiredTuple = CISTPL_FUNCID; if ((info->multi == 0) && ((first_tuple(handle, &tuple, &parse) != CS_SUCCESS) || (parse.funcid.func == CISTPL_FUNCID_MULTI) || (parse.funcid.func == CISTPL_FUNCID_SERIAL))) { tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; if ((first_tuple(handle, &tuple, &parse) == CS_SUCCESS) && (((cf->io.nwin == 1) && (cf->io.win[0].len == 16)) || ((cf->io.nwin == 2) && (cf->io.win[0].len == 8) && (cf->io.win[1].len == 8)))) info->multi = 2; } if (info->multi > 1) multi_config(link); else simple_config(link); if (info->ndev == 0) goto failed; if (info->manfid == MANFID_IBM) { conf_reg_t reg = { 0, CS_READ, 0x800, 0 }; CS_CHECK(AccessConfigurationRegister, link->handle, ®); reg.Action = CS_WRITE; reg.Value = reg.Value | 1; CS_CHECK(AccessConfigurationRegister, link->handle, ®); } link->dev = &info->node[0]; link->state &= ~DEV_CONFIG_PENDING; return; cs_failed: cs_error(link->handle, last_fn, last_ret); failed: serial_release((u_long)link); } /* serial_config */ /*====================================================================== After a card is removed, serial_release() will unregister the net device, and release the PCMCIA configuration. ======================================================================*/ void serial_release(u_long arg) { dev_link_t *link = (dev_link_t *)arg; serial_info_t *info = link->priv; int i; sti(); DEBUG(0, "serial_release(0x%p)\n", link); for (i = 0; i < info->ndev; i++) { unregister_serial(info->line[i]); } link->dev = NULL; if (!info->slave) { CardServices(ReleaseConfiguration, link->handle); CardServices(ReleaseIO, link->handle, &link->io); CardServices(ReleaseIRQ, link->handle, &link->irq); } link->state &= ~DEV_CONFIG; } /* serial_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 serial drivers from talking to the ports. ======================================================================*/ static int serial_event(event_t event, int priority, event_callback_args_t *args) { dev_link_t *link = args->client_data; serial_info_t *info = link->priv; DEBUG(1, "serial_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; serial_config(link); break; case CS_EVENT_PM_SUSPEND: link->state |= DEV_SUSPEND; /* Fall through... */ case CS_EVENT_RESET_PHYSICAL: if ((link->state & DEV_CONFIG) && !info->slave) 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) && !info->slave) CardServices(RequestConfiguration, link->handle, &link->conf); break; } return 0; } /* serial_event */ /*====================================================================*/ int init_module(void) { servinfo_t serv; DEBUG(0, "%s\n", version); CardServices(GetCardServicesInfo, &serv); if (serv.Revision != CS_RELEASE_CODE) { printk(KERN_NOTICE "serial_cs: Card Services release " "does not match!\n"); return -1; } register_pcmcia_driver(&dev_info, &serial_attach, &serial_detach); return 0; } void cleanup_module(void) { DEBUG(0, "serial_cs: unloading\n"); unregister_pcmcia_driver(&dev_info); while (dev_list != NULL) serial_detach(dev_list); }