diff options
Diffstat (limited to 'drivers/isdn/hisax/sedlbauer_cs.c')
| -rw-r--r-- | drivers/isdn/hisax/sedlbauer_cs.c | 640 |
1 files changed, 640 insertions, 0 deletions
diff --git a/drivers/isdn/hisax/sedlbauer_cs.c b/drivers/isdn/hisax/sedlbauer_cs.c new file mode 100644 index 000000000000..449651241477 --- /dev/null +++ b/drivers/isdn/hisax/sedlbauer_cs.c @@ -0,0 +1,640 @@ +/*====================================================================== + + A Sedlbauer PCMCIA client driver + + This driver is for the Sedlbauer Speed Star and Speed Star II, + which are ISDN PCMCIA Cards. + + 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 + <dahinds@users.sourceforge.net>. Portions created by David A. Hinds + are Copyright (C) 1999 David A. Hinds. All Rights Reserved. + + Modifications from dummy_cs.c are Copyright (C) 1999-2001 Marcus Niemann + <maniemann@users.sourceforge.net>. All Rights Reserved. + + Alternatively, the contents of this file may be used under the + terms of the GNU General Public License version 2 (the "GPL"), in + which case the provisions of the GPL are applicable instead of the + above. If you wish to allow the use of your version of this file + only under the terms of the GPL and not to allow others to use + your version of this file under the MPL, indicate your decision + by deleting the provisions above and replace them with the notice + and other provisions required by the GPL. If you do not delete + the provisions above, a recipient may use your version of this + file under either the MPL or the GPL. + +======================================================================*/ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/ptrace.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/ioport.h> +#include <asm/io.h> +#include <asm/system.h> + +#include <pcmcia/version.h> +#include <pcmcia/cs_types.h> +#include <pcmcia/cs.h> +#include <pcmcia/cistpl.h> +#include <pcmcia/cisreg.h> +#include <pcmcia/ds.h> +#include "hisax_cfg.h" + +MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Sedlbauer cards"); +MODULE_AUTHOR("Marcus Niemann"); +MODULE_LICENSE("Dual MPL/GPL"); + +/* + All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If + you do not define PCMCIA_DEBUG at all, all the debug code will be + left out. If you compile with PCMCIA_DEBUG=0, the debug code will + be present but disabled -- but it can then be enabled for specific + modules at load time with a 'pc_debug=#' option to insmod. +*/ + +#ifdef PCMCIA_DEBUG +static int pc_debug = PCMCIA_DEBUG; +module_param(pc_debug, int, 0); +#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args); +static char *version = +"sedlbauer_cs.c 1.1a 2001/01/28 15:04:04 (M.Niemann)"; +#else +#define DEBUG(n, args...) +#endif + + +/*====================================================================*/ + +/* Parameters that can be set with 'insmod' */ + +static int protocol = 2; /* EURO-ISDN Default */ +module_param(protocol, int, 0); + +/*====================================================================*/ + +/* + The event() function is this driver's Card Services event handler. + It will be called by Card Services when an appropriate card status + event is received. The config() and release() entry points are + used to configure or release a socket, in response to card + insertion and ejection events. They are invoked from the sedlbauer + event handler. +*/ + +static void sedlbauer_config(dev_link_t *link); +static void sedlbauer_release(dev_link_t *link); +static int sedlbauer_event(event_t event, int priority, + event_callback_args_t *args); + +/* + The attach() and detach() entry points are used to create and destroy + "instances" of the driver, where each instance represents everything + needed to manage one actual PCMCIA card. +*/ + +static dev_link_t *sedlbauer_attach(void); +static void sedlbauer_detach(dev_link_t *); + +/* + You'll also need to prototype all the functions that will actually + be used to talk to your device. See 'memory_cs' for a good example + of a fully self-sufficient driver; the other drivers rely more or + less on other parts of the kernel. +*/ + +/* + The dev_info variable is the "key" that is used to match up this + device driver with appropriate cards, through the card configuration + database. +*/ + +static dev_info_t dev_info = "sedlbauer_cs"; + +/* + A linked list of "instances" of the sedlbauer device. Each actual + PCMCIA card corresponds to one device instance, and is described + by one dev_link_t structure (defined in ds.h). + + You may not want to use a linked list for this -- for example, the + memory card driver uses an array of dev_link_t pointers, where minor + device numbers are used to derive the corresponding array index. +*/ + +static dev_link_t *dev_list = NULL; + +/* + A dev_link_t structure has fields for most things that are needed + to keep track of a socket, but there will usually be some device + specific information that also needs to be kept track of. The + 'priv' pointer in a dev_link_t structure can be used to point to + a device-specific private data structure, like this. + + To simplify the data structure handling, we actually include the + dev_link_t structure in the device's private data structure. + + A driver needs to provide a dev_node_t structure for each device + on a card. In some cases, there is only one device per card (for + example, ethernet cards, modems). In other cases, there may be + many actual or logical devices (SCSI adapters, memory cards with + multiple partitions). The dev_node_t structures need to be kept + in a linked list starting at the 'dev' field of a dev_link_t + structure. We allocate them in the card's private data structure, + because they generally shouldn't be allocated dynamically. + + In this case, we also provide a flag to indicate if a device is + "stopped" due to a power management event, or card ejection. The + device IO routines can use a flag like this to throttle IO to a + card that is not ready to accept it. +*/ + +typedef struct local_info_t { + dev_link_t link; + dev_node_t node; + int stop; + int cardnr; +} local_info_t; + +/*====================================================================== + + sedlbauer_attach() creates an "instance" of the driver, allocating + local data structures for one device. The device is registered + with Card Services. + + The dev_link structure is initialized, but we don't actually + configure the card at this point -- we wait until we receive a + card insertion event. + +======================================================================*/ + +static dev_link_t *sedlbauer_attach(void) +{ + local_info_t *local; + dev_link_t *link; + client_reg_t client_reg; + int ret; + + DEBUG(0, "sedlbauer_attach()\n"); + + /* Allocate space for private device-specific data */ + local = kmalloc(sizeof(local_info_t), GFP_KERNEL); + if (!local) return NULL; + memset(local, 0, sizeof(local_info_t)); + local->cardnr = -1; + link = &local->link; link->priv = local; + + /* Interrupt setup */ + link->irq.Attributes = IRQ_TYPE_EXCLUSIVE; + link->irq.IRQInfo1 = IRQ_LEVEL_ID; + link->irq.Handler = NULL; + + /* + General socket configuration defaults can go here. In this + client, we assume very little, and rely on the CIS for almost + everything. In most clients, many details (i.e., number, sizes, + and attributes of IO windows) are fixed by the nature of the + device, and can be hard-wired here. + */ + + /* from old sedl_cs + */ + /* The io structure describes IO port mapping */ + link->io.NumPorts1 = 8; + link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; + link->io.IOAddrLines = 3; + + + link->conf.Attributes = 0; + link->conf.Vcc = 50; + link->conf.IntType = INT_MEMORY_AND_IO; + + /* Register with Card Services */ + link->next = dev_list; + dev_list = link; + client_reg.dev_info = &dev_info; + 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 = &sedlbauer_event; + client_reg.Version = 0x0210; + client_reg.event_callback_args.client_data = link; + ret = pcmcia_register_client(&link->handle, &client_reg); + if (ret != CS_SUCCESS) { + cs_error(link->handle, RegisterClient, ret); + sedlbauer_detach(link); + return NULL; + } + + return link; +} /* sedlbauer_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 sedlbauer_detach(dev_link_t *link) +{ + dev_link_t **linkp; + + DEBUG(0, "sedlbauer_detach(0x%p)\n", link); + + /* Locate device structure */ + for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next) + if (*linkp == link) break; + if (*linkp == NULL) + return; + + /* + If the device is currently configured and active, we won't + actually delete it yet. Instead, it is marked so that when + the release() function is called, that will trigger a proper + detach(). + */ + if (link->state & DEV_CONFIG) { +#ifdef PCMCIA_DEBUG + printk(KERN_DEBUG "sedlbauer_cs: detach postponed, '%s' " + "still locked\n", link->dev->dev_name); +#endif + link->state |= DEV_STALE_LINK; + return; + } + + /* Break the link with Card Services */ + if (link->handle) + pcmcia_deregister_client(link->handle); + + /* Unlink device structure, and free it */ + *linkp = link->next; + /* This points to the parent local_info_t struct */ + kfree(link->priv); +} /* sedlbauer_detach */ + +/*====================================================================== + + sedlbauer_config() is scheduled to run after a CARD_INSERTION event + is received, to configure the PCMCIA socket, and to make the + device available to the system. + +======================================================================*/ +#define CS_CHECK(fn, ret) \ +do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0) + +static void sedlbauer_config(dev_link_t *link) +{ + client_handle_t handle = link->handle; + local_info_t *dev = link->priv; + tuple_t tuple; + cisparse_t parse; + int last_fn, last_ret; + u8 buf[64]; + config_info_t conf; + win_req_t req; + memreq_t map; + IsdnCard_t icard; + + DEBUG(0, "sedlbauer_config(0x%p)\n", link); + + /* + This reads the card's CONFIG tuple to find its configuration + registers. + */ + tuple.DesiredTuple = CISTPL_CONFIG; + tuple.Attributes = 0; + tuple.TupleData = buf; + tuple.TupleDataMax = sizeof(buf); + tuple.TupleOffset = 0; + CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple)); + CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple)); + CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse)); + link->conf.ConfigBase = parse.config.base; + link->conf.Present = parse.config.rmask[0]; + + /* Configure card */ + link->state |= DEV_CONFIG; + + /* Look up the current Vcc */ + CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf)); + link->conf.Vcc = conf.Vcc; + + /* + In this loop, we scan the CIS for configuration table entries, + each of which describes a valid card configuration, including + voltage, IO window, memory window, and interrupt settings. + + We make no assumptions about the card to be configured: we use + just the information available in the CIS. In an ideal world, + this would work for any PCMCIA card, but it requires a complete + and accurate CIS. In practice, a driver usually "knows" most of + these things without consulting the CIS, and most client drivers + will only use the CIS to fill in implementation-defined details. + */ + tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; + CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple)); + while (1) { + cistpl_cftable_entry_t dflt = { 0 }; + cistpl_cftable_entry_t *cfg = &(parse.cftable_entry); + if (pcmcia_get_tuple_data(handle, &tuple) != 0 || + pcmcia_parse_tuple(handle, &tuple, &parse) != 0) + goto next_entry; + + if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg; + if (cfg->index == 0) goto next_entry; + link->conf.ConfigIndex = cfg->index; + + /* Does this card need audio output? */ + if (cfg->flags & CISTPL_CFTABLE_AUDIO) { + link->conf.Attributes |= CONF_ENABLE_SPKR; + link->conf.Status = CCSR_AUDIO_ENA; + } + + /* Use power settings for Vcc and Vpp if present */ + /* Note that the CIS values need to be rescaled */ + if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) { + if (conf.Vcc != cfg->vcc.param[CISTPL_POWER_VNOM]/10000) + goto next_entry; + } else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM)) { + if (conf.Vcc != dflt.vcc.param[CISTPL_POWER_VNOM]/10000) + goto next_entry; + } + + if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM)) + link->conf.Vpp1 = link->conf.Vpp2 = + cfg->vpp1.param[CISTPL_POWER_VNOM]/10000; + else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM)) + link->conf.Vpp1 = link->conf.Vpp2 = + dflt.vpp1.param[CISTPL_POWER_VNOM]/10000; + + /* Do we need to allocate an interrupt? */ + if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1) + link->conf.Attributes |= CONF_ENABLE_IRQ; + + /* IO window settings */ + link->io.NumPorts1 = link->io.NumPorts2 = 0; + if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) { + cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io; + link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; + if (!(io->flags & CISTPL_IO_8BIT)) + link->io.Attributes1 = IO_DATA_PATH_WIDTH_16; + if (!(io->flags & CISTPL_IO_16BIT)) + link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; +/* new in dummy.cs 2001/01/28 MN + link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; +*/ + link->io.BasePort1 = io->win[0].base; + link->io.NumPorts1 = io->win[0].len; + if (io->nwin > 1) { + link->io.Attributes2 = link->io.Attributes1; + link->io.BasePort2 = io->win[1].base; + link->io.NumPorts2 = io->win[1].len; + } + /* This reserves IO space but doesn't actually enable it */ + if (pcmcia_request_io(link->handle, &link->io) != 0) + goto next_entry; + } + + /* + Now set up a common memory window, if needed. There is room + in the dev_link_t structure for one memory window handle, + but if the base addresses need to be saved, or if multiple + windows are needed, the info should go in the private data + structure for this device. + + Note that the memory window base is a physical address, and + needs to be mapped to virtual space with ioremap() before it + is used. + */ + if ((cfg->mem.nwin > 0) || (dflt.mem.nwin > 0)) { + cistpl_mem_t *mem = + (cfg->mem.nwin) ? &cfg->mem : &dflt.mem; + req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM; + req.Attributes |= WIN_ENABLE; + req.Base = mem->win[0].host_addr; + req.Size = mem->win[0].len; +/* new in dummy.cs 2001/01/28 MN + if (req.Size < 0x1000) + req.Size = 0x1000; +*/ + req.AccessSpeed = 0; + if (pcmcia_request_window(&link->handle, &req, &link->win) != 0) + goto next_entry; + map.Page = 0; map.CardOffset = mem->win[0].card_addr; + if (pcmcia_map_mem_page(link->win, &map) != 0) + goto next_entry; + } + /* If we got this far, we're cool! */ + break; + + next_entry: +/* new in dummy.cs 2001/01/28 MN + if (link->io.NumPorts1) + pcmcia_release_io(link->handle, &link->io); +*/ + CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple)); + } + + /* + Allocate an interrupt line. Note that this does not assign a + handler to the interrupt, unless the 'Handler' member of the + irq structure is initialized. + */ + if (link->conf.Attributes & CONF_ENABLE_IRQ) + CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq)); + + /* + This actually configures the PCMCIA socket -- setting up + the I/O windows and the interrupt mapping, and putting the + card and host interface into "Memory and IO" mode. + */ + CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf)); + + /* + At this point, the dev_node_t structure(s) need to be + initialized and arranged in a linked list at link->dev. + */ + sprintf(dev->node.dev_name, "sedlbauer"); + dev->node.major = dev->node.minor = 0; + link->dev = &dev->node; + + /* Finally, report what we've done */ + printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d", + dev->node.dev_name, link->conf.ConfigIndex, + link->conf.Vcc/10, link->conf.Vcc%10); + if (link->conf.Vpp1) + printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10); + if (link->conf.Attributes & CONF_ENABLE_IRQ) + printk(", irq %d", link->irq.AssignedIRQ); + if (link->io.NumPorts1) + printk(", io 0x%04x-0x%04x", link->io.BasePort1, + link->io.BasePort1+link->io.NumPorts1-1); + if (link->io.NumPorts2) + printk(" & 0x%04x-0x%04x", link->io.BasePort2, + link->io.BasePort2+link->io.NumPorts2-1); + if (link->win) + printk(", mem 0x%06lx-0x%06lx", req.Base, + req.Base+req.Size-1); + printk("\n"); + + link->state &= ~DEV_CONFIG_PENDING; + + icard.para[0] = link->irq.AssignedIRQ; + icard.para[1] = link->io.BasePort1; + icard.protocol = protocol; + icard.typ = ISDN_CTYPE_SEDLBAUER_PCMCIA; + + last_ret = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->stop), &icard); + if (last_ret < 0) { + printk(KERN_ERR "sedlbauer_cs: failed to initialize SEDLBAUER PCMCIA %d at i/o %#x\n", + last_ret, link->io.BasePort1); + sedlbauer_release(link); + } else + ((local_info_t*)link->priv)->cardnr = last_ret; + + return; + +cs_failed: + cs_error(link->handle, last_fn, last_ret); + sedlbauer_release(link); + +} /* sedlbauer_config */ + +/*====================================================================== + + After a card is removed, sedlbauer_release() will unregister the + device, and release the PCMCIA configuration. If the device is + still open, this will be postponed until it is closed. + +======================================================================*/ + +static void sedlbauer_release(dev_link_t *link) +{ + local_info_t *local = link->priv; + DEBUG(0, "sedlbauer_release(0x%p)\n", link); + + if (local) { + if (local->cardnr >= 0) { + /* no unregister function with hisax */ + HiSax_closecard(local->cardnr); + } + } + /* Unlink the device chain */ + link->dev = NULL; + + /* + In a normal driver, additional code may be needed to release + other kernel data structures associated with this device. + */ + + /* Don't bother checking to see if these succeed or not */ + if (link->win) + pcmcia_release_window(link->win); + pcmcia_release_configuration(link->handle); + if (link->io.NumPorts1) + pcmcia_release_io(link->handle, &link->io); + if (link->irq.AssignedIRQ) + pcmcia_release_irq(link->handle, &link->irq); + link->state &= ~DEV_CONFIG; + + if (link->state & DEV_STALE_LINK) + sedlbauer_detach(link); + +} /* sedlbauer_release */ + +/*====================================================================== + + The card status event handler. Mostly, this schedules other + stuff to run after an event is received. + + When a CARD_REMOVAL event is received, we immediately set a + private flag to block future accesses to this device. All the + functions that actually access the device should check this flag + to make sure the card is still present. + +======================================================================*/ + +static int sedlbauer_event(event_t event, int priority, + event_callback_args_t *args) +{ + dev_link_t *link = args->client_data; + local_info_t *dev = link->priv; + + DEBUG(1, "sedlbauer_event(0x%06x)\n", event); + + switch (event) { + case CS_EVENT_CARD_REMOVAL: + link->state &= ~DEV_PRESENT; + if (link->state & DEV_CONFIG) { + ((local_info_t *)link->priv)->stop = 1; + sedlbauer_release(link); + } + break; + case CS_EVENT_CARD_INSERTION: + link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; + sedlbauer_config(link); + break; + case CS_EVENT_PM_SUSPEND: + link->state |= DEV_SUSPEND; + /* Fall through... */ + case CS_EVENT_RESET_PHYSICAL: + /* Mark the device as stopped, to block IO until later */ + dev->stop = 1; + if (link->state & DEV_CONFIG) + pcmcia_release_configuration(link->handle); + break; + case CS_EVENT_PM_RESUME: + link->state &= ~DEV_SUSPEND; + /* Fall through... */ + case CS_EVENT_CARD_RESET: + if (link->state & DEV_CONFIG) + pcmcia_request_configuration(link->handle, &link->conf); + dev->stop = 0; + /* + In a normal driver, additional code may go here to restore + the device state and restart IO. + */ + break; + } + return 0; +} /* sedlbauer_event */ + +static struct pcmcia_driver sedlbauer_driver = { + .owner = THIS_MODULE, + .drv = { + .name = "sedlbauer_cs", + }, + .attach = sedlbauer_attach, + .detach = sedlbauer_detach, +}; + +static int __init init_sedlbauer_cs(void) +{ + return pcmcia_register_driver(&sedlbauer_driver); +} + +static void __exit exit_sedlbauer_cs(void) +{ + pcmcia_unregister_driver(&sedlbauer_driver); + BUG_ON(dev_list != NULL); +} + +module_init(init_sedlbauer_cs); +module_exit(exit_sedlbauer_cs); |