diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/ni_labpc_cs.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/ni_labpc_cs.c | 573 |
1 files changed, 573 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/ni_labpc_cs.c b/drivers/staging/comedi/drivers/ni_labpc_cs.c new file mode 100644 index 000000000000..ac0ce2f58f5f --- /dev/null +++ b/drivers/staging/comedi/drivers/ni_labpc_cs.c @@ -0,0 +1,573 @@ +/* + comedi/drivers/ni_labpc_cs.c + Driver for National Instruments daqcard-1200 boards + Copyright (C) 2001, 2002, 2003 Frank Mori Hess <fmhess@users.sourceforge.net> + + PCMCIA crap 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. + + 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_labpc_cs +Description: National Instruments Lab-PC (& compatibles) +Author: Frank Mori Hess <fmhess@users.sourceforge.net> +Devices: [National Instruments] DAQCard-1200 (daqcard-1200) +Status: works + +Thanks go to Fredrik Lingvall for much testing and perseverance in +helping to debug daqcard-1200 support. + +The 1200 series boards have onboard calibration dacs for correcting +analog input/output offsets and gains. The proper settings for these +caldacs are stored on the board's eeprom. To read the caldac values +from the eeprom and store them into a file that can be then be used by +comedilib, use the comedi_calibrate program. + +Configuration options: + none + +The daqcard-1200 has quirky chanlist requirements +when scanning multiple channels. Multiple channel scan +sequence must start at highest channel, then decrement down to +channel 0. Chanlists consisting of all one channel +are also legal, and allow you to pace conversions in bursts. + +*/ + +/* + +NI manuals: +340988a (daqcard-1200) + +*/ + +#undef LABPC_DEBUG +//#define LABPC_DEBUG // enable debugging messages + +#include "../comedidev.h" + +#include <linux/delay.h> + +#include "8253.h" +#include "8255.h" +#include "comedi_fc.h" +#include "ni_labpc.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; + +static int labpc_attach(struct comedi_device * dev, struct comedi_devconfig * it); + +static const labpc_board labpc_cs_boards[] = { + { + name: "daqcard-1200", + device_id:0x103, // 0x10b is manufacturer id, 0x103 is device id + ai_speed:10000, + bustype: pcmcia_bustype, + register_layout:labpc_1200_layout, + has_ao: 1, + ai_range_table:&range_labpc_1200_ai, + ai_range_code:labpc_1200_ai_gain_bits, + ai_range_is_unipolar:labpc_1200_is_unipolar, + ai_scan_up:0, + memory_mapped_io:0, + }, + /* duplicate entry, to support using alternate name */ + { + name: "ni_labpc_cs", + device_id:0x103, + ai_speed:10000, + bustype: pcmcia_bustype, + register_layout:labpc_1200_layout, + has_ao: 1, + ai_range_table:&range_labpc_1200_ai, + ai_range_code:labpc_1200_ai_gain_bits, + ai_range_is_unipolar:labpc_1200_is_unipolar, + ai_scan_up:0, + memory_mapped_io:0, + }, +}; + +/* + * Useful for shorthand access to the particular board structure + */ +#define thisboard ((const labpc_board *)dev->board_ptr) + +static struct comedi_driver driver_labpc_cs = { + .driver_name = "ni_labpc_cs", + .module = THIS_MODULE, + .attach = &labpc_attach, + .detach = &labpc_common_detach, + .num_names = sizeof(labpc_cs_boards) / sizeof(labpc_board), + .board_name = &labpc_cs_boards[0].name, + .offset = sizeof(labpc_board), +}; + +static int labpc_attach(struct comedi_device * dev, struct comedi_devconfig * it) +{ + unsigned long iobase = 0; + unsigned int irq = 0; + struct pcmcia_device *link; + + /* allocate and initialize dev->private */ + if (alloc_private(dev, sizeof(labpc_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; + irq = link->irq.AssignedIRQ; + break; + default: + printk("bug! couldn't determine board type\n"); + return -EINVAL; + break; + } + return labpc_common_attach(dev, iobase, irq, 0); +} + +/* + 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 = + "ni_labpc.c, based on dummy_cs.c 1.31 2001/08/24 12:13:13"; +#else +#define DEBUG(n, args...) +#endif + +/*====================================================================*/ + +/* + 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 dummy + event handler. + + Kernel version 2.6.16 upwards uses suspend() and resume() functions + instead of an event() function. +*/ + +static void labpc_config(struct pcmcia_device *link); +static void labpc_release(struct pcmcia_device *link); +static int labpc_cs_suspend(struct pcmcia_device *p_dev); +static int labpc_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 labpc_cs_attach(struct pcmcia_device *); +static void labpc_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 = "daqcard-1200"; + +typedef struct local_info_t { + struct pcmcia_device *link; + dev_node_t node; + int stop; + struct bus_operations *bus; +} local_info_t; + +/*====================================================================== + + labpc_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 labpc_cs_attach(struct pcmcia_device *link) +{ + local_info_t *local; + + DEBUG(0, "labpc_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 | IRQ_FORCED_PULSE; + link->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_PULSE_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; + + labpc_config(link); + + return 0; +} /* labpc_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 labpc_cs_detach(struct pcmcia_device *link) +{ + DEBUG(0, "labpc_cs_detach(0x%p)\n", link); + + /* + 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->dev_node) { + ((local_info_t *) link->priv)->stop = 1; + labpc_release(link); + } + + /* This points to the parent local_info_t struct */ + if (link->priv) + kfree(link->priv); + +} /* labpc_cs_detach */ + +/*====================================================================== + + labpc_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 labpc_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 }; + + DEBUG(0, "labpc_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))) { + cs_error(link, GetFirstTuple, last_ret); + goto cs_failed; + } + if ((last_ret = pcmcia_get_tuple_data(link, &tuple))) { + cs_error(link, GetTupleData, last_ret); + goto cs_failed; + } + if ((last_ret = pcmcia_parse_tuple(&tuple, &parse))) { + 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))) { + 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)) + goto next_entry; + if (pcmcia_parse_tuple(&tuple, &parse)) + 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_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)) + 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; + link->win = (window_handle_t) link; + 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))) { + 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))) { + 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))) { + 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, "daqcard-1200"); + 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: + labpc_release(link); + +} /* labpc_config */ + +static void labpc_release(struct pcmcia_device *link) +{ + DEBUG(0, "labpc_release(0x%p)\n", link); + + pcmcia_disable_device(link); +} /* labpc_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 labpc_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; +} /* labpc_cs_suspend */ + +static int labpc_cs_resume(struct pcmcia_device *link) +{ + local_info_t *local = link->priv; + + local->stop = 0; + return 0; +} /* labpc_cs_resume */ + +/*====================================================================*/ + +static struct pcmcia_device_id labpc_cs_ids[] = { + /* N.B. These IDs should match those in labpc_cs_boards (ni_labpc.c) */ + PCMCIA_DEVICE_MANF_CARD(0x010b, 0x0103), /* daqcard-1200 */ + PCMCIA_DEVICE_NULL +}; + +MODULE_DEVICE_TABLE(pcmcia, labpc_cs_ids); + +struct pcmcia_driver labpc_cs_driver = { + .probe = labpc_cs_attach, + .remove = labpc_cs_detach, + .suspend = labpc_cs_suspend, + .resume = labpc_cs_resume, + .id_table = labpc_cs_ids, + .owner = THIS_MODULE, + .drv = { + .name = dev_info, + }, +}; + +static int __init init_labpc_cs(void) +{ + DEBUG(0, "%s\n", version); + pcmcia_register_driver(&labpc_cs_driver); + return 0; +} + +static void __exit exit_labpc_cs(void) +{ + DEBUG(0, "ni_labpc: unloading\n"); + pcmcia_unregister_driver(&labpc_cs_driver); +} + +int __init labpc_init_module(void) +{ + int ret; + + ret = init_labpc_cs(); + if (ret < 0) + return ret; + + return comedi_driver_register(&driver_labpc_cs); +} + +void __exit labpc_exit_module(void) +{ + exit_labpc_cs(); + comedi_driver_unregister(&driver_labpc_cs); +} + +MODULE_LICENSE("GPL"); +module_init(labpc_init_module); +module_exit(labpc_exit_module); |