diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/ni_daq_dio24.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/ni_daq_dio24.c | 598 |
1 files changed, 598 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/ni_daq_dio24.c b/drivers/staging/comedi/drivers/ni_daq_dio24.c new file mode 100644 index 000000000000..daec5c4b4c95 --- /dev/null +++ b/drivers/staging/comedi/drivers/ni_daq_dio24.c @@ -0,0 +1,598 @@ +/* + comedi/drivers/ni_daq_dio24.c + Driver for National Instruments PCMCIA DAQ-Card DIO-24 + Copyright (C) 2002 Daniel Vecino Castel <dvecino@able.es> + + PCMCIA crap at end of file is adapted from dummy_cs.c 1.31 2001/08/24 12:13:13 + from the pcmcia package. + The initial developer of the pcmcia dummy_cs.c 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. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +************************************************************************ +*/ +/* +Driver: ni_daq_dio24 +Description: National Instruments PCMCIA DAQ-Card DIO-24 +Author: Daniel Vecino Castel <dvecino@able.es> +Devices: [National Instruments] PCMCIA DAQ-Card DIO-24 (ni_daq_dio24) +Status: ? +Updated: Thu, 07 Nov 2002 21:53:06 -0800 + +This is just a wrapper around the 8255.o driver to properly handle +the PCMCIA interface. +*/ + +//#define LABPC_DEBUG // enable debugging messages +#undef LABPC_DEBUG + +#include "../comedidev.h" + +#include <linux/ioport.h> + +#include "8255.h" + +#include <pcmcia/cs_types.h> +#include <pcmcia/cs.h> +#include <pcmcia/cistpl.h> +#include <pcmcia/cisreg.h> +#include <pcmcia/ds.h> + +static struct pcmcia_device *pcmcia_cur_dev = NULL; + +#define DIO24_SIZE 4 // size of io region used by board + +static int dio24_attach(struct comedi_device * dev, struct comedi_devconfig * it); +static int dio24_detach(struct comedi_device * dev); + +enum dio24_bustype { pcmcia_bustype }; + +typedef struct dio24_board_struct { + const char *name; + int device_id; // device id for pcmcia board + enum dio24_bustype bustype; // PCMCIA + int have_dio; // have 8255 chip + // function pointers so we can use inb/outb or readb/writeb as appropriate + unsigned int (*read_byte) (unsigned int address); + void (*write_byte) (unsigned int byte, unsigned int address); +} dio24_board; + +static const dio24_board dio24_boards[] = { + { + name: "daqcard-dio24", + device_id:0x475c,// 0x10b is manufacturer id, 0x475c is device id + bustype: pcmcia_bustype, + have_dio:1, + }, + { + name: "ni_daq_dio24", + device_id:0x475c,// 0x10b is manufacturer id, 0x475c is device id + bustype: pcmcia_bustype, + have_dio:1, + }, +}; + +/* + * Useful for shorthand access to the particular board structure + */ +#define thisboard ((const dio24_board *)dev->board_ptr) + +struct dio24_private { + + int data; /* number of data points left to be taken */ +}; + + +#define devpriv ((struct dio24_private *)dev->private) + +static struct comedi_driver driver_dio24 = { + driver_name:"ni_daq_dio24", + module:THIS_MODULE, + attach:dio24_attach, + detach:dio24_detach, + num_names:sizeof(dio24_boards) / sizeof(dio24_board), + board_name:&dio24_boards[0].name, + offset:sizeof(dio24_board), +}; + +static int dio24_attach(struct comedi_device * dev, struct comedi_devconfig * it) +{ + struct comedi_subdevice *s; + unsigned long iobase = 0; +#ifdef incomplete + unsigned int irq = 0; +#endif + struct pcmcia_device *link; + + /* allocate and initialize dev->private */ + if (alloc_private(dev, sizeof(struct dio24_private)) < 0) + return -ENOMEM; + + // get base address, irq etc. based on bustype + switch (thisboard->bustype) { + case pcmcia_bustype: + link = pcmcia_cur_dev; /* XXX hack */ + if (!link) + return -EIO; + iobase = link->io.BasePort1; +#ifdef incomplete + irq = link->irq.AssignedIRQ; +#endif + break; + default: + printk("bug! couldn't determine board type\n"); + return -EINVAL; + break; + } + printk("comedi%d: ni_daq_dio24: %s, io 0x%lx", dev->minor, + thisboard->name, iobase); +#ifdef incomplete + if (irq) { + printk(", irq %u", irq); + } +#endif + + printk("\n"); + + if (iobase == 0) { + printk("io base address is zero!\n"); + return -EINVAL; + } + + dev->iobase = iobase; + +#ifdef incomplete + /* grab our IRQ */ + dev->irq = irq; +#endif + + dev->board_name = thisboard->name; + + if (alloc_subdevices(dev, 1) < 0) + return -ENOMEM; + + /* 8255 dio */ + s = dev->subdevices + 0; + subdev_8255_init(dev, s, NULL, dev->iobase); + + return 0; +}; + +static int dio24_detach(struct comedi_device * dev) +{ + printk("comedi%d: ni_daq_dio24: remove\n", dev->minor); + + if (dev->subdevices) + subdev_8255_cleanup(dev, dev->subdevices + 0); + + if (thisboard->bustype != pcmcia_bustype && dev->iobase) + release_region(dev->iobase, DIO24_SIZE); + if (dev->irq) + comedi_free_irq(dev->irq, dev); + + return 0; +}; + +// PCMCIA crap + +/* + 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, 0644); +#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args) +static char *version = "ni_daq_dio24.c, based on dummy_cs.c"; +#else +#define DEBUG(n, args...) +#endif + +/*====================================================================*/ + +static void dio24_config(struct pcmcia_device *link); +static void dio24_release(struct pcmcia_device *link); +static int dio24_cs_suspend(struct pcmcia_device *p_dev); +static int dio24_cs_resume(struct pcmcia_device *p_dev); + +/* + 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 int dio24_cs_attach(struct pcmcia_device *); +static void dio24_cs_detach(struct pcmcia_device *); + +/* + 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 const dev_info_t dev_info = "ni_daq_dio24"; + +typedef struct local_info_t { + struct pcmcia_device *link; + dev_node_t node; + int stop; + struct bus_operations *bus; +} local_info_t; + +/*====================================================================== + + dio24_cs_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 int dio24_cs_attach(struct pcmcia_device *link) +{ + local_info_t *local; + + printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - CS-attach!\n"); + + DEBUG(0, "dio24_cs_attach()\n"); + + /* Allocate space for private device-specific data */ + local = kzalloc(sizeof(local_info_t), GFP_KERNEL); + if (!local) + return -ENOMEM; + local->link = 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. + */ + link->conf.Attributes = 0; + link->conf.IntType = INT_MEMORY_AND_IO; + + pcmcia_cur_dev = link; + + dio24_config(link); + + return 0; +} /* dio24_cs_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 dio24_cs_detach(struct pcmcia_device *link) +{ + + printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - cs-detach!\n"); + + DEBUG(0, "dio24_cs_detach(0x%p)\n", link); + + if (link->dev_node) { + ((local_info_t *) link->priv)->stop = 1; + dio24_release(link); + } + + /* This points to the parent local_info_t struct */ + if (link->priv) + kfree(link->priv); + +} /* dio24_cs_detach */ + +/*====================================================================== + + dio24_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. + +======================================================================*/ + +static void dio24_config(struct pcmcia_device *link) +{ + local_info_t *dev = link->priv; + tuple_t tuple; + cisparse_t parse; + int last_ret; + u_char buf[64]; + win_req_t req; + memreq_t map; + cistpl_cftable_entry_t dflt = { 0 }; + + printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO! - config\n"); + + DEBUG(0, "dio24_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; + if ((last_ret = pcmcia_get_first_tuple(link, &tuple)) != 0) { + cs_error(link, GetFirstTuple, last_ret); + goto cs_failed; + } + if ((last_ret = pcmcia_get_tuple_data(link, &tuple)) != 0) { + cs_error(link, GetTupleData, last_ret); + goto cs_failed; + } + if ((last_ret = pcmcia_parse_tuple(&tuple, &parse)) != 0) { + cs_error(link, ParseTuple, last_ret); + goto cs_failed; + } + link->conf.ConfigBase = parse.config.base; + link->conf.Present = parse.config.rmask[0]; + + /* + 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; + if ((last_ret = pcmcia_get_first_tuple(link, &tuple)) != 0) { + cs_error(link, GetFirstTuple, last_ret); + goto cs_failed; + } + while (1) { + cistpl_cftable_entry_t *cfg = &(parse.cftable_entry); + if (pcmcia_get_tuple_data(link, &tuple) != 0) + goto next_entry; + if (pcmcia_parse_tuple(&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; + } + + /* 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; + 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, &link->io) != 0) + goto next_entry; + } + + 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; + if (req.Size < 0x1000) + req.Size = 0x1000; + req.AccessSpeed = 0; + if (pcmcia_request_window(&link, &req, &link->win)) + goto next_entry; + map.Page = 0; + map.CardOffset = mem->win[0].card_addr; + if (pcmcia_map_mem_page(link->win, &map)) + goto next_entry; + } + /* If we got this far, we're cool! */ + break; + + next_entry: + if ((last_ret = pcmcia_get_next_tuple(link, &tuple)) != 0) { + cs_error(link, GetNextTuple, last_ret); + goto cs_failed; + } + } + + /* + 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) + if ((last_ret = pcmcia_request_irq(link, &link->irq)) != 0) { + cs_error(link, RequestIRQ, last_ret); + goto cs_failed; + } + + /* + 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. + */ + if ((last_ret = pcmcia_request_configuration(link, &link->conf)) != 0) { + cs_error(link, RequestConfiguration, last_ret); + goto cs_failed; + } + + /* + 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, "ni_daq_dio24"); + dev->node.major = dev->node.minor = 0; + link->dev_node = &dev->node; + + /* Finally, report what we've done */ + printk(KERN_INFO "%s: index 0x%02x", + dev->node.dev_name, link->conf.ConfigIndex); + 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"); + + return; + + cs_failed: + printk(KERN_INFO "Fallo"); + dio24_release(link); + +} /* dio24_config */ + +static void dio24_release(struct pcmcia_device *link) +{ + DEBUG(0, "dio24_release(0x%p)\n", link); + + pcmcia_disable_device(link); +} /* dio24_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 dio24_cs_suspend(struct pcmcia_device *link) +{ + local_info_t *local = link->priv; + + /* Mark the device as stopped, to block IO until later */ + local->stop = 1; + return 0; +} /* dio24_cs_suspend */ + +static int dio24_cs_resume(struct pcmcia_device *link) +{ + local_info_t *local = link->priv; + + local->stop = 0; + return 0; +} /* dio24_cs_resume */ + +/*====================================================================*/ + +static struct pcmcia_device_id dio24_cs_ids[] = { + /* N.B. These IDs should match those in dio24_boards */ + PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c), /* daqcard-dio24 */ + PCMCIA_DEVICE_NULL +}; + +MODULE_DEVICE_TABLE(pcmcia, dio24_cs_ids); + +struct pcmcia_driver dio24_cs_driver = { + .probe = dio24_cs_attach, + .remove = dio24_cs_detach, + .suspend = dio24_cs_suspend, + .resume = dio24_cs_resume, + .id_table = dio24_cs_ids, + .owner = THIS_MODULE, + .drv = { + .name = dev_info, + }, +}; + +static int __init init_dio24_cs(void) +{ + printk("ni_daq_dio24: HOLA SOY YO!\n"); + DEBUG(0, "%s\n", version); + pcmcia_register_driver(&dio24_cs_driver); + return 0; +} + +static void __exit exit_dio24_cs(void) +{ + DEBUG(0, "ni_dio24: unloading\n"); + pcmcia_unregister_driver(&dio24_cs_driver); +} + +int __init init_module(void) +{ + int ret; + + ret = init_dio24_cs(); + if (ret < 0) + return ret; + + return comedi_driver_register(&driver_dio24); +} + +void __exit cleanup_module(void) +{ + exit_dio24_cs(); + comedi_driver_unregister(&driver_dio24); +} |