diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/das08_cs.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/das08_cs.c | 488 |
1 files changed, 488 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/das08_cs.c b/drivers/staging/comedi/drivers/das08_cs.c new file mode 100644 index 000000000000..be6c88788c4b --- /dev/null +++ b/drivers/staging/comedi/drivers/das08_cs.c @@ -0,0 +1,488 @@ +/* + comedi/drivers/das08_cs.c + DAS08 driver + + COMEDI - Linux Control and Measurement Device Interface + Copyright (C) 2000 David A. Schleef <ds@schleef.org> + Copyright (C) 2001,2002,2003 Frank Mori Hess <fmhess@users.sourceforge.net> + + 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: das08_cs +Description: DAS-08 PCMCIA boards +Author: Warren Jasper, ds, Frank Hess +Devices: [ComputerBoards] PCM-DAS08 (pcm-das08) +Status: works + +This is the PCMCIA-specific support split off from the +das08 driver. + +Options (for pcm-das08): + NONE + +Command support does not exist, but could be added for this board. +*/ + +#include "../comedidev.h" + +#include <linux/delay.h> +#include <linux/pci.h> + +#include "das08.h" + +// pcmcia includes +#include <pcmcia/cs_types.h> +#include <pcmcia/cs.h> +#include <pcmcia/cistpl.h> +#include <pcmcia/ds.h> + +static struct pcmcia_device *cur_dev = NULL; + +#define thisboard ((const struct das08_board_struct *)dev->board_ptr) + +static int das08_cs_attach(struct comedi_device * dev, struct comedi_devconfig * it); + +static struct comedi_driver driver_das08_cs = { + driver_name:"das08_cs", + module:THIS_MODULE, + attach:das08_cs_attach, + detach:das08_common_detach, + board_name:&das08_cs_boards[0].name, + num_names:sizeof(das08_cs_boards) / + sizeof(struct das08_board_struct), + offset:sizeof(struct das08_board_struct), +}; + +static int das08_cs_attach(struct comedi_device * dev, struct comedi_devconfig * it) +{ + int ret; + unsigned long iobase; + struct pcmcia_device *link = cur_dev; // XXX hack + + if ((ret = alloc_private(dev, sizeof(struct das08_private_struct))) < 0) + return ret; + + printk("comedi%d: das08_cs: ", dev->minor); + // deal with a pci board + + if (thisboard->bustype == pcmcia) { + if (link == NULL) { + printk(" no pcmcia cards found\n"); + return -EIO; + } + iobase = link->io.BasePort1; + } else { + printk(" bug! board does not have PCMCIA bustype\n"); + return -EINVAL; + } + + printk("\n"); + + return das08_common_attach(dev, iobase); +} + +/*====================================================================== + + The following pcmcia code for the pcm-das08 is adapted from the + dummy_cs.c driver of the Linux PCMCIA Card Services package. + + 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. + +======================================================================*/ + +/* + 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 const char *version = + "das08.c pcmcia code (Frank Hess), modified from dummy_cs.c 1.31 2001/08/24 12:13:13 (David Hinds)"; +#else +#define DEBUG(n, args...) +#endif + +/*====================================================================*/ +static void das08_pcmcia_config(struct pcmcia_device *link); +static void das08_pcmcia_release(struct pcmcia_device *link); +static int das08_pcmcia_suspend(struct pcmcia_device *p_dev); +static int das08_pcmcia_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 das08_pcmcia_attach(struct pcmcia_device *); +static void das08_pcmcia_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 = "pcm-das08"; + +struct local_info_t { + struct pcmcia_device *link; + dev_node_t node; + int stop; + struct bus_operations *bus; +}; + +/*====================================================================== + + das08_pcmcia_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 das08_pcmcia_attach(struct pcmcia_device *link) +{ + struct local_info_t *local; + + DEBUG(0, "das08_pcmcia_attach()\n"); + + /* Allocate space for private device-specific data */ + local = kzalloc(sizeof(struct 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; + + cur_dev = link; + + das08_pcmcia_config(link); + + return 0; +} /* das08_pcmcia_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 das08_pcmcia_detach(struct pcmcia_device *link) +{ + + DEBUG(0, "das08_pcmcia_detach(0x%p)\n", link); + + if (link->dev_node) { + ((struct local_info_t *) link->priv)->stop = 1; + das08_pcmcia_release(link); + } + + /* This points to the parent struct local_info_t struct */ + if (link->priv) + kfree(link->priv); + +} /* das08_pcmcia_detach */ + +/*====================================================================== + + das08_pcmcia_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 das08_pcmcia_config(struct pcmcia_device *link) +{ + struct local_info_t *dev = link->priv; + tuple_t tuple; + cisparse_t parse; + int last_fn, last_ret; + u_char buf[64]; + cistpl_cftable_entry_t dflt = { 0 }; + + DEBUG(0, "das08_pcmcia_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; + last_fn = GetFirstTuple; + if ((last_ret = pcmcia_get_first_tuple(link, &tuple)) != 0) + goto cs_failed; + last_fn = GetTupleData; + if ((last_ret = pcmcia_get_tuple_data(link, &tuple)) != 0) + goto cs_failed; + last_fn = ParseTuple; + if ((last_ret = pcmcia_parse_tuple(&tuple, &parse)) != 0) + 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; + last_fn = GetFirstTuple; + if ((last_ret = pcmcia_get_first_tuple(link, &tuple)) != 0) + goto cs_failed; + while (1) { + cistpl_cftable_entry_t *cfg = &(parse.cftable_entry); + if ((last_ret = pcmcia_get_tuple_data(link, &tuple)) != 0) + goto next_entry; + if ((last_ret = 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 we got this far, we're cool! */ + break; + + next_entry: + last_fn = GetNextTuple; + if ((last_ret = pcmcia_get_next_tuple(link, &tuple)) != 0) + goto cs_failed; + } + + if (link->conf.Attributes & CONF_ENABLE_IRQ) { + last_fn = RequestIRQ; + if ((last_ret = pcmcia_request_irq(link, &link->irq)) != 0) + 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. + */ + last_fn = RequestConfiguration; + if ((last_ret = pcmcia_request_configuration(link, &link->conf)) != 0) + 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, "pcm-das08"); + 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 %u", 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); + printk("\n"); + + return; + + cs_failed: + cs_error(link, last_fn, last_ret); + das08_pcmcia_release(link); + +} /* das08_pcmcia_config */ + +/*====================================================================== + + After a card is removed, das08_pcmcia_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 das08_pcmcia_release(struct pcmcia_device *link) +{ + DEBUG(0, "das08_pcmcia_release(0x%p)\n", link); + pcmcia_disable_device(link); +} /* das08_pcmcia_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 das08_pcmcia_suspend(struct pcmcia_device *link) +{ + struct local_info_t *local = link->priv; + /* Mark the device as stopped, to block IO until later */ + local->stop = 1; + + return 0; +} /* das08_pcmcia_suspend */ + +static int das08_pcmcia_resume(struct pcmcia_device *link) +{ + struct local_info_t *local = link->priv; + + local->stop = 0; + return 0; +} /* das08_pcmcia_resume */ + +/*====================================================================*/ + +static struct pcmcia_device_id das08_cs_id_table[] = { + PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001), + PCMCIA_DEVICE_NULL +}; + +MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table); + +struct pcmcia_driver das08_cs_driver = { + .probe = das08_pcmcia_attach, + .remove = das08_pcmcia_detach, + .suspend = das08_pcmcia_suspend, + .resume = das08_pcmcia_resume, + .id_table = das08_cs_id_table, + .owner = THIS_MODULE, + .drv = { + .name = dev_info, + }, +}; + +static int __init init_das08_pcmcia_cs(void) +{ + DEBUG(0, "%s\n", version); + pcmcia_register_driver(&das08_cs_driver); + return 0; +} + +static void __exit exit_das08_pcmcia_cs(void) +{ + DEBUG(0, "das08_pcmcia_cs: unloading\n"); + pcmcia_unregister_driver(&das08_cs_driver); +} + +static int __init das08_cs_init_module(void) +{ + int ret; + + ret = init_das08_pcmcia_cs(); + if (ret < 0) + return ret; + + return comedi_driver_register(&driver_das08_cs); +} + +static void __exit das08_cs_exit_module(void) +{ + exit_das08_pcmcia_cs(); + comedi_driver_unregister(&driver_das08_cs); +} + +MODULE_LICENSE("GPL"); +module_init(das08_cs_init_module); +module_exit(das08_cs_exit_module); |