diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/amplc_pci224.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/amplc_pci224.c | 1545 |
1 files changed, 1545 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/amplc_pci224.c b/drivers/staging/comedi/drivers/amplc_pci224.c new file mode 100644 index 000000000000..770b96648932 --- /dev/null +++ b/drivers/staging/comedi/drivers/amplc_pci224.c @@ -0,0 +1,1545 @@ +/* + comedi/drivers/amplc_pci224.c + Driver for Amplicon PCI224 and PCI234 AO boards. + + Copyright (C) 2005 MEV Ltd. <http://www.mev.co.uk/> + + COMEDI - Linux Control and Measurement Device Interface + Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org> + + 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: amplc_pci224 +Description: Amplicon PCI224, PCI234 +Author: Ian Abbott <abbotti@mev.co.uk> +Devices: [Amplicon] PCI224 (amplc_pci224 or pci224), + PCI234 (amplc_pci224 or pci234) +Updated: Wed, 22 Oct 2008 12:25:08 +0100 +Status: works, but see caveats + +Supports: + + - ao_insn read/write + - ao_do_cmd mode with the following sources: + + - start_src TRIG_INT TRIG_EXT + - scan_begin_src TRIG_TIMER TRIG_EXT + - convert_src TRIG_NOW + - scan_end_src TRIG_COUNT + - stop_src TRIG_COUNT TRIG_EXT TRIG_NONE + + The channel list must contain at least one channel with no repeated + channels. The scan end count must equal the number of channels in + the channel list. + + There is only one external trigger source so only one of start_src, + scan_begin_src or stop_src may use TRIG_EXT. + +Configuration options - PCI224: + [0] - PCI bus of device (optional). + [1] - PCI slot of device (optional). + If bus/slot is not specified, the first available PCI device + will be used. + [2] - Select available ranges according to jumper LK1. All channels + are set to the same range: + 0=Jumper position 1-2 (factory default), 4 software-selectable + internal voltage references, giving 4 bipolar and 4 unipolar + ranges: + [-10V,+10V], [-5V,+5V], [-2.5V,+2.5V], [-1.25V,+1.25V], + [0,+10V], [0,+5V], [0,+2.5V], [0,1.25V]. + 1=Jumper position 2-3, 1 external voltage reference, giving + 1 bipolar and 1 unipolar range: + [-Vext,+Vext], [0,+Vext]. + +Configuration options - PCI234: + [0] - PCI bus of device (optional). + [1] - PCI slot of device (optional). + If bus/slot is not specified, the first available PCI device + will be used. + [2] - Select internal or external voltage reference according to + jumper LK1. This affects all channels: + 0=Jumper position 1-2 (factory default), Vref=5V internal. + 1=Jumper position 2-3, Vref=Vext external. + [3] - Select channel 0 range according to jumper LK2: + 0=Jumper position 2-3 (factory default), range [-2*Vref,+2*Vref] + (10V bipolar when options[2]=0). + 1=Jumper position 1-2, range [-Vref,+Vref] + (5V bipolar when options[2]=0). + [4] - Select channel 1 range according to jumper LK3: cf. options[3]. + [5] - Select channel 2 range according to jumper LK4: cf. options[3]. + [6] - Select channel 3 range according to jumper LK5: cf. options[3]. + +Passing a zero for an option is the same as leaving it unspecified. + +Caveats: + + 1) All channels on the PCI224 share the same range. Any change to the + range as a result of insn_write or a streaming command will affect + the output voltages of all channels, including those not specified + by the instruction or command. + + 2) For the analog output command, the first scan may be triggered + falsely at the start of acquisition. This occurs when the DAC scan + trigger source is switched from 'none' to 'timer' (scan_begin_src = + TRIG_TIMER) or 'external' (scan_begin_src == TRIG_EXT) at the start + of acquisition and the trigger source is at logic level 1 at the + time of the switch. This is very likely for TRIG_TIMER. For + TRIG_EXT, it depends on the state of the external line and whether + the CR_INVERT flag has been set. The remaining scans are triggered + correctly. +*/ + +#include "../comedidev.h" + +#include "comedi_pci.h" + +#include "comedi_fc.h" +#include "8253.h" + +#define DRIVER_NAME "amplc_pci224" + +/* + * PCI IDs. + */ +/* #define PCI_VENDOR_ID_AMPLICON 0x14dc */ +#define PCI_DEVICE_ID_AMPLICON_PCI224 0x0007 +#define PCI_DEVICE_ID_AMPLICON_PCI234 0x0008 +#define PCI_DEVICE_ID_INVALID 0xffff + +/* + * PCI224/234 i/o space 1 (PCIBAR2) registers. + */ +#define PCI224_IO1_SIZE 0x20 /* Size of i/o space 1 (8-bit registers) */ +#define PCI224_Z2_CT0 0x14 /* 82C54 counter/timer 0 */ +#define PCI224_Z2_CT1 0x15 /* 82C54 counter/timer 1 */ +#define PCI224_Z2_CT2 0x16 /* 82C54 counter/timer 2 */ +#define PCI224_Z2_CTC 0x17 /* 82C54 counter/timer control word */ +#define PCI224_ZCLK_SCE 0x1A /* Group Z Clock Configuration Register */ +#define PCI224_ZGAT_SCE 0x1D /* Group Z Gate Configuration Register */ +#define PCI224_INT_SCE 0x1E /* ISR Interrupt source mask register */ + /* /Interrupt status */ + +/* + * PCI224/234 i/o space 2 (PCIBAR3) 16-bit registers. + */ +#define PCI224_IO2_SIZE 0x10 /* Size of i/o space 2 (16-bit registers). */ +#define PCI224_DACDATA 0x00 /* (w-o) DAC FIFO data. */ +#define PCI224_SOFTTRIG 0x00 /* (r-o) DAC software scan trigger. */ +#define PCI224_DACCON 0x02 /* (r/w) DAC status/configuration. */ +#define PCI224_FIFOSIZ 0x04 /* (w-o) FIFO size for wraparound mode. */ +#define PCI224_DACCEN 0x06 /* (w-o) DAC channel enable register. */ + +/* + * DACCON values. + */ +/* (r/w) Scan trigger. */ +#define PCI224_DACCON_TRIG_MASK (7 << 0) +#define PCI224_DACCON_TRIG_NONE (0 << 0) /* none */ +#define PCI224_DACCON_TRIG_SW (1 << 0) /* software trig */ +#define PCI224_DACCON_TRIG_EXTP (2 << 0) /* ext +ve edge */ +#define PCI224_DACCON_TRIG_EXTN (3 << 0) /* ext -ve edge */ +#define PCI224_DACCON_TRIG_Z2CT0 (4 << 0) /* Z2 CT0 out */ +#define PCI224_DACCON_TRIG_Z2CT1 (5 << 0) /* Z2 CT1 out */ +#define PCI224_DACCON_TRIG_Z2CT2 (6 << 0) /* Z2 CT2 out */ +/* (r/w) Polarity (PCI224 only, PCI234 always bipolar!). */ +#define PCI224_DACCON_POLAR_MASK (1 << 3) +#define PCI224_DACCON_POLAR_UNI (0 << 3) /* range [0,Vref] */ +#define PCI224_DACCON_POLAR_BI (1 << 3) /* range [-Vref,Vref] */ +/* (r/w) Internal Vref (PCI224 only, when LK1 in position 1-2). */ +#define PCI224_DACCON_VREF_MASK (3 << 4) +#define PCI224_DACCON_VREF_1_25 (0 << 4) /* Vref = 1.25V */ +#define PCI224_DACCON_VREF_2_5 (1 << 4) /* Vref = 2.5V */ +#define PCI224_DACCON_VREF_5 (2 << 4) /* Vref = 5V */ +#define PCI224_DACCON_VREF_10 (3 << 4) /* Vref = 10V */ +/* (r/w) Wraparound mode enable (to play back stored waveform). */ +#define PCI224_DACCON_FIFOWRAP (1 << 7) +/* (r/w) FIFO enable. It MUST be set! */ +#define PCI224_DACCON_FIFOENAB (1 << 8) +/* (r/w) FIFO interrupt trigger level (most values are not very useful). */ +#define PCI224_DACCON_FIFOINTR_MASK (7 << 9) +#define PCI224_DACCON_FIFOINTR_EMPTY (0 << 9) /* when empty */ +#define PCI224_DACCON_FIFOINTR_NEMPTY (1 << 9) /* when not empty */ +#define PCI224_DACCON_FIFOINTR_NHALF (2 << 9) /* when not half full */ +#define PCI224_DACCON_FIFOINTR_HALF (3 << 9) /* when half full */ +#define PCI224_DACCON_FIFOINTR_NFULL (4 << 9) /* when not full */ +#define PCI224_DACCON_FIFOINTR_FULL (5 << 9) /* when full */ +/* (r-o) FIFO fill level. */ +#define PCI224_DACCON_FIFOFL_MASK (7 << 12) +#define PCI224_DACCON_FIFOFL_EMPTY (1 << 12) /* 0 */ +#define PCI224_DACCON_FIFOFL_ONETOHALF (0 << 12) /* [1,2048] */ +#define PCI224_DACCON_FIFOFL_HALFTOFULL (4 << 12) /* [2049,4095] */ +#define PCI224_DACCON_FIFOFL_FULL (6 << 12) /* 4096 */ +/* (r-o) DAC busy flag. */ +#define PCI224_DACCON_BUSY (1 << 15) +/* (w-o) FIFO reset. */ +#define PCI224_DACCON_FIFORESET (1 << 12) +/* (w-o) Global reset (not sure what it does). */ +#define PCI224_DACCON_GLOBALRESET (1 << 13) + +/* + * DAC FIFO size. + */ +#define PCI224_FIFO_SIZE 4096 + +/* + * DAC FIFO guaranteed minimum room available, depending on reported fill level. + * The maximum room available depends on the reported fill level and how much + * has been written! + */ +#define PCI224_FIFO_ROOM_EMPTY PCI224_FIFO_SIZE +#define PCI224_FIFO_ROOM_ONETOHALF (PCI224_FIFO_SIZE / 2) +#define PCI224_FIFO_ROOM_HALFTOFULL 1 +#define PCI224_FIFO_ROOM_FULL 0 + +/* + * Counter/timer clock input configuration sources. + */ +#define CLK_CLK 0 /* reserved (channel-specific clock) */ +#define CLK_10MHZ 1 /* internal 10 MHz clock */ +#define CLK_1MHZ 2 /* internal 1 MHz clock */ +#define CLK_100KHZ 3 /* internal 100 kHz clock */ +#define CLK_10KHZ 4 /* internal 10 kHz clock */ +#define CLK_1KHZ 5 /* internal 1 kHz clock */ +#define CLK_OUTNM1 6 /* output of channel-1 modulo total */ +#define CLK_EXT 7 /* external clock */ +/* Macro to construct clock input configuration register value. */ +#define CLK_CONFIG(chan, src) ((((chan) & 3) << 3) | ((src) & 7)) +/* Timebases in ns. */ +#define TIMEBASE_10MHZ 100 +#define TIMEBASE_1MHZ 1000 +#define TIMEBASE_100KHZ 10000 +#define TIMEBASE_10KHZ 100000 +#define TIMEBASE_1KHZ 1000000 + +/* + * Counter/timer gate input configuration sources. + */ +#define GAT_VCC 0 /* VCC (i.e. enabled) */ +#define GAT_GND 1 /* GND (i.e. disabled) */ +#define GAT_EXT 2 /* reserved (external gate input) */ +#define GAT_NOUTNM2 3 /* inverted output of channel-2 modulo total */ +/* Macro to construct gate input configuration register value. */ +#define GAT_CONFIG(chan, src) ((((chan) & 3) << 3) | ((src) & 7)) + +/* + * Summary of CLK_OUTNM1 and GAT_NOUTNM2 connections for PCI224 and PCI234: + * + * Channel's Channel's + * clock input gate input + * Channel CLK_OUTNM1 GAT_NOUTNM2 + * ------- ---------- ----------- + * Z2-CT0 Z2-CT2-OUT /Z2-CT1-OUT + * Z2-CT1 Z2-CT0-OUT /Z2-CT2-OUT + * Z2-CT2 Z2-CT1-OUT /Z2-CT0-OUT + */ + +/* + * Interrupt enable/status bits + */ +#define PCI224_INTR_EXT 0x01 /* rising edge on external input */ +#define PCI224_INTR_DAC 0x04 /* DAC (FIFO) interrupt */ +#define PCI224_INTR_Z2CT1 0x20 /* rising edge on Z2-CT1 output */ + +#define PCI224_INTR_EDGE_BITS (PCI224_INTR_EXT | PCI224_INTR_Z2CT1) +#define PCI224_INTR_LEVEL_BITS PCI224_INTR_DACFIFO + +/* + * Handy macros. + */ + +/* Combine old and new bits. */ +#define COMBINE(old, new, mask) (((old) & ~(mask)) | ((new) & (mask))) + +/* A generic null function pointer value. */ +#define NULLFUNC 0 + +/* Current CPU. XXX should this be hard_smp_processor_id()? */ +#define THISCPU smp_processor_id() + +/* State bits for use with atomic bit operations. */ +#define AO_CMD_STARTED 0 + +/* + * Range tables. + */ + +/* The software selectable internal ranges for PCI224 (option[2] == 0). */ +static const struct comedi_lrange range_pci224_internal = { + 8, + { + BIP_RANGE(10), + BIP_RANGE(5), + BIP_RANGE(2.5), + BIP_RANGE(1.25), + UNI_RANGE(10), + UNI_RANGE(5), + UNI_RANGE(2.5), + UNI_RANGE(1.25), + } +}; + +static const unsigned short hwrange_pci224_internal[8] = { + PCI224_DACCON_POLAR_BI | PCI224_DACCON_VREF_10, + PCI224_DACCON_POLAR_BI | PCI224_DACCON_VREF_5, + PCI224_DACCON_POLAR_BI | PCI224_DACCON_VREF_2_5, + PCI224_DACCON_POLAR_BI | PCI224_DACCON_VREF_1_25, + PCI224_DACCON_POLAR_UNI | PCI224_DACCON_VREF_10, + PCI224_DACCON_POLAR_UNI | PCI224_DACCON_VREF_5, + PCI224_DACCON_POLAR_UNI | PCI224_DACCON_VREF_2_5, + PCI224_DACCON_POLAR_UNI | PCI224_DACCON_VREF_1_25, +}; + +/* The software selectable external ranges for PCI224 (option[2] == 1). */ +static const struct comedi_lrange range_pci224_external = { + 2, + { + RANGE_ext(-1, 1), /* bipolar [-Vref,+Vref] */ + RANGE_ext(0, 1), /* unipolar [0,+Vref] */ + } +}; + +static const unsigned short hwrange_pci224_external[2] = { + PCI224_DACCON_POLAR_BI, + PCI224_DACCON_POLAR_UNI, +}; + +/* The hardware selectable Vref*2 external range for PCI234 + * (option[2] == 1, option[3+n] == 0). */ +static const struct comedi_lrange range_pci234_ext2 = { + 1, + { + RANGE_ext(-2, 2), + } +}; + +/* The hardware selectable Vref external range for PCI234 + * (option[2] == 1, option[3+n] == 1). */ +static const struct comedi_lrange range_pci234_ext = { + 1, + { + RANGE_ext(-1, 1), + } +}; + +/* This serves for all the PCI234 ranges. */ +static const unsigned short hwrange_pci234[1] = { + PCI224_DACCON_POLAR_BI, /* bipolar - hardware ignores it! */ +}; + +/* + * Board descriptions. + */ + +enum pci224_model { any_model, pci224_model, pci234_model }; + +struct pci224_board { + const char *name; + unsigned short devid; + enum pci224_model model; + unsigned int ao_chans; + unsigned int ao_bits; +}; + +static const struct pci224_board pci224_boards[] = { + { + name: "pci224", + devid: PCI_DEVICE_ID_AMPLICON_PCI224, + model: pci224_model, + ao_chans:16, + ao_bits: 12, + }, + { + name: "pci234", + devid: PCI_DEVICE_ID_AMPLICON_PCI234, + model: pci234_model, + ao_chans:4, + ao_bits: 16, + }, + { + name: DRIVER_NAME, + devid: PCI_DEVICE_ID_INVALID, + model: any_model, /* wildcard */ + }, +}; + +/* + * PCI driver table. + */ + +static DEFINE_PCI_DEVICE_TABLE(pci224_pci_table) = { + {PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI224, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + {PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI234, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + {0} +}; + +MODULE_DEVICE_TABLE(pci, pci224_pci_table); + +/* + * Useful for shorthand access to the particular board structure + */ +#define thisboard ((struct pci224_board *)dev->board_ptr) + +/* this structure is for data unique to this hardware driver. If + several hardware drivers keep similar information in this structure, + feel free to suggest moving the variable to the struct comedi_device struct. */ +struct pci224_private { + struct pci_dev *pci_dev; /* PCI device */ + const unsigned short *hwrange; + unsigned long iobase1; + unsigned long state; + spinlock_t ao_spinlock; + unsigned int *ao_readback; + short *ao_scan_vals; + unsigned char *ao_scan_order; + int intr_cpuid; + short intr_running; + unsigned short daccon; + unsigned int cached_div1; + unsigned int cached_div2; + unsigned int ao_stop_count; + short ao_stop_continuous; + unsigned short ao_enab; /* max 16 channels so 'short' will do */ + unsigned char intsce; +}; + +#define devpriv ((struct pci224_private *)dev->private) + +/* + * The struct comedi_driver structure tells the Comedi core module + * which functions to call to configure/deconfigure (attach/detach) + * the board, and also about the kernel module that contains + * the device code. + */ +static int pci224_attach(struct comedi_device * dev, struct comedi_devconfig * it); +static int pci224_detach(struct comedi_device * dev); +static struct comedi_driver driver_amplc_pci224 = { + driver_name:DRIVER_NAME, + module:THIS_MODULE, + attach:pci224_attach, + detach:pci224_detach, + board_name:&pci224_boards[0].name, + offset:sizeof(struct pci224_board), + num_names:sizeof(pci224_boards) / sizeof(struct pci224_board), +}; + +COMEDI_PCI_INITCLEANUP(driver_amplc_pci224, pci224_pci_table); + +/* + * Called from the 'insn_write' function to perform a single write. + */ +static void +pci224_ao_set_data(struct comedi_device * dev, int chan, int range, unsigned int data) +{ + unsigned short mangled; + + /* Store unmangled data for readback. */ + devpriv->ao_readback[chan] = data; + /* Enable the channel. */ + outw(1 << chan, dev->iobase + PCI224_DACCEN); + /* Set range and reset FIFO. */ + devpriv->daccon = COMBINE(devpriv->daccon, devpriv->hwrange[range], + (PCI224_DACCON_POLAR_MASK | PCI224_DACCON_VREF_MASK)); + outw(devpriv->daccon | PCI224_DACCON_FIFORESET, + dev->iobase + PCI224_DACCON); + /* + * Mangle the data. The hardware expects: + * - bipolar: 16-bit 2's complement + * - unipolar: 16-bit unsigned + */ + mangled = (unsigned short)data << (16 - thisboard->ao_bits); + if ((devpriv->daccon & PCI224_DACCON_POLAR_MASK) == + PCI224_DACCON_POLAR_BI) { + mangled ^= 0x8000; + } + /* Write mangled data to the FIFO. */ + outw(mangled, dev->iobase + PCI224_DACDATA); + /* Trigger the conversion. */ + inw(dev->iobase + PCI224_SOFTTRIG); +} + +/* + * 'insn_write' function for AO subdevice. + */ +static int +pci224_ao_insn_write(struct comedi_device * dev, struct comedi_subdevice * s, + struct comedi_insn * insn, unsigned int * data) +{ + int i; + int chan, range; + + /* Unpack channel and range. */ + chan = CR_CHAN(insn->chanspec); + range = CR_RANGE(insn->chanspec); + + /* Writing a list of values to an AO channel is probably not + * very useful, but that's how the interface is defined. */ + for (i = 0; i < insn->n; i++) { + pci224_ao_set_data(dev, chan, range, data[i]); + } + return i; +} + +/* + * 'insn_read' function for AO subdevice. + * + * N.B. The value read will not be valid if the DAC channel has + * never been written successfully since the device was attached + * or since the channel has been used by an AO streaming write + * command. + */ +static int +pci224_ao_insn_read(struct comedi_device * dev, struct comedi_subdevice * s, + struct comedi_insn * insn, unsigned int * data) +{ + int i; + int chan; + + chan = CR_CHAN(insn->chanspec); + + for (i = 0; i < insn->n; i++) { + data[i] = devpriv->ao_readback[chan]; + } + + return i; +} + +/* + * Just a wrapper for the inline function 'i8253_cascade_ns_to_timer'. + */ +static void +pci224_cascade_ns_to_timer(int osc_base, unsigned int *d1, unsigned int *d2, + unsigned int *nanosec, int round_mode) +{ + i8253_cascade_ns_to_timer(osc_base, d1, d2, nanosec, round_mode); +} + +/* + * Kills a command running on the AO subdevice. + */ +static void pci224_ao_stop(struct comedi_device * dev, struct comedi_subdevice * s) +{ + unsigned long flags; + + if (!test_and_clear_bit(AO_CMD_STARTED, &devpriv->state)) { + return; + } + + comedi_spin_lock_irqsave(&devpriv->ao_spinlock, flags); + /* Kill the interrupts. */ + devpriv->intsce = 0; + outb(0, devpriv->iobase1 + PCI224_INT_SCE); + /* + * Interrupt routine may or may not be running. We may or may not + * have been called from the interrupt routine (directly or + * indirectly via a comedi_events() callback routine). It's highly + * unlikely that we've been called from some other interrupt routine + * but who knows what strange things coders get up to! + * + * If the interrupt routine is currently running, wait for it to + * finish, unless we appear to have been called via the interrupt + * routine. + */ + while (devpriv->intr_running && devpriv->intr_cpuid != THISCPU) { + comedi_spin_unlock_irqrestore(&devpriv->ao_spinlock, flags); + comedi_spin_lock_irqsave(&devpriv->ao_spinlock, flags); + } + comedi_spin_unlock_irqrestore(&devpriv->ao_spinlock, flags); + /* Reconfigure DAC for insn_write usage. */ + outw(0, dev->iobase + PCI224_DACCEN); /* Disable channels. */ + devpriv->daccon = COMBINE(devpriv->daccon, + PCI224_DACCON_TRIG_SW | PCI224_DACCON_FIFOINTR_EMPTY, + PCI224_DACCON_TRIG_MASK | PCI224_DACCON_FIFOINTR_MASK); + outw(devpriv->daccon | PCI224_DACCON_FIFORESET, + dev->iobase + PCI224_DACCON); +} + +/* + * Handles start of acquisition for the AO subdevice. + */ +static void pci224_ao_start(struct comedi_device * dev, struct comedi_subdevice * s) +{ + struct comedi_cmd *cmd = &s->async->cmd; + unsigned long flags; + + set_bit(AO_CMD_STARTED, &devpriv->state); + if (!devpriv->ao_stop_continuous && devpriv->ao_stop_count == 0) { + /* An empty acquisition! */ + pci224_ao_stop(dev, s); + s->async->events |= COMEDI_CB_EOA; + comedi_event(dev, s); + } else { + /* Enable interrupts. */ + comedi_spin_lock_irqsave(&devpriv->ao_spinlock, flags); + if (cmd->stop_src == TRIG_EXT) { + devpriv->intsce = PCI224_INTR_EXT | PCI224_INTR_DAC; + } else { + devpriv->intsce = PCI224_INTR_DAC; + } + outb(devpriv->intsce, devpriv->iobase1 + PCI224_INT_SCE); + comedi_spin_unlock_irqrestore(&devpriv->ao_spinlock, flags); + } +} + +/* + * Handles interrupts from the DAC FIFO. + */ +static void pci224_ao_handle_fifo(struct comedi_device * dev, struct comedi_subdevice * s) +{ + struct comedi_cmd *cmd = &s->async->cmd; + unsigned int num_scans; + unsigned int room; + unsigned short dacstat; + unsigned int i, n; + unsigned int bytes_per_scan; + + if (cmd->chanlist_len) { + bytes_per_scan = cmd->chanlist_len * sizeof(short); + } else { + /* Shouldn't get here! */ + bytes_per_scan = sizeof(short); + } + /* Determine number of scans available in buffer. */ + num_scans = comedi_buf_read_n_available(s->async) / bytes_per_scan; + if (!devpriv->ao_stop_continuous) { + /* Fixed number of scans. */ + if (num_scans > devpriv->ao_stop_count) { + num_scans = devpriv->ao_stop_count; + } + } + + /* Determine how much room is in the FIFO (in samples). */ + dacstat = inw(dev->iobase + PCI224_DACCON); + switch (dacstat & PCI224_DACCON_FIFOFL_MASK) { + case PCI224_DACCON_FIFOFL_EMPTY: + room = PCI224_FIFO_ROOM_EMPTY; + if (!devpriv->ao_stop_continuous + && devpriv->ao_stop_count == 0) { + /* FIFO empty at end of counted acquisition. */ + pci224_ao_stop(dev, s); + s->async->events |= COMEDI_CB_EOA; + comedi_event(dev, s); + return; + } + break; + case PCI224_DACCON_FIFOFL_ONETOHALF: + room = PCI224_FIFO_ROOM_ONETOHALF; + break; + case PCI224_DACCON_FIFOFL_HALFTOFULL: + room = PCI224_FIFO_ROOM_HALFTOFULL; + break; + default: + room = PCI224_FIFO_ROOM_FULL; + break; + } + if (room >= PCI224_FIFO_ROOM_ONETOHALF) { + /* FIFO is less than half-full. */ + if (num_scans == 0) { + /* Nothing left to put in the FIFO. */ + pci224_ao_stop(dev, s); + s->async->events |= COMEDI_CB_OVERFLOW; + rt_printk(KERN_ERR "comedi%d: " + "AO buffer underrun\n", dev->minor); + } + } + /* Determine how many new scans can be put in the FIFO. */ + if (cmd->chanlist_len) { + room /= cmd->chanlist_len; + } + /* Determine how many scans to process. */ + if (num_scans > room) { + num_scans = room; + } + /* Process scans. */ + for (n = 0; n < num_scans; n++) { + cfc_read_array_from_buffer(s, &devpriv->ao_scan_vals[0], + bytes_per_scan); + for (i = 0; i < cmd->chanlist_len; i++) { + outw(devpriv->ao_scan_vals[devpriv-> + ao_scan_order[i]], + dev->iobase + PCI224_DACDATA); + } + } + if (!devpriv->ao_stop_continuous) { + devpriv->ao_stop_count -= num_scans; + if (devpriv->ao_stop_count == 0) { + /* + * Change FIFO interrupt trigger level to wait + * until FIFO is empty. + */ + devpriv->daccon = COMBINE(devpriv->daccon, + PCI224_DACCON_FIFOINTR_EMPTY, + PCI224_DACCON_FIFOINTR_MASK); + outw(devpriv->daccon, + dev->iobase + PCI224_DACCON); + } + } + if ((devpriv->daccon & PCI224_DACCON_TRIG_MASK) == + PCI224_DACCON_TRIG_NONE) { + unsigned short trig; + + /* + * This is the initial DAC FIFO interrupt at the + * start of the acquisition. The DAC's scan trigger + * has been set to 'none' up until now. + * + * Now that data has been written to the FIFO, the + * DAC's scan trigger source can be set to the + * correct value. + * + * BUG: The first scan will be triggered immediately + * if the scan trigger source is at logic level 1. + */ + if (cmd->scan_begin_src == TRIG_TIMER) { + trig = PCI224_DACCON_TRIG_Z2CT0; + } else { + /* cmd->scan_begin_src == TRIG_EXT */ + if (cmd->scan_begin_arg & CR_INVERT) { + trig = PCI224_DACCON_TRIG_EXTN; + } else { + trig = PCI224_DACCON_TRIG_EXTP; + } + } + devpriv->daccon = COMBINE(devpriv->daccon, trig, + PCI224_DACCON_TRIG_MASK); + outw(devpriv->daccon, dev->iobase + PCI224_DACCON); + } + if (s->async->events) { + comedi_event(dev, s); + } +} + +/* + * Internal trigger function to start acquisition on AO subdevice. + */ +static int +pci224_ao_inttrig_start(struct comedi_device * dev, struct comedi_subdevice * s, + unsigned int trignum) +{ + if (trignum != 0) + return -EINVAL; + + s->async->inttrig = NULLFUNC; + pci224_ao_start(dev, s); + + return 1; +} + +#define MAX_SCAN_PERIOD 0xFFFFFFFFU +#define MIN_SCAN_PERIOD 2500 +#define CONVERT_PERIOD 625 + +/* + * 'do_cmdtest' function for AO subdevice. + */ +static int +pci224_ao_cmdtest(struct comedi_device * dev, struct comedi_subdevice * s, struct comedi_cmd * cmd) +{ + int err = 0; + unsigned int tmp; + + /* Step 1: make sure trigger sources are trivially valid. */ + + tmp = cmd->start_src; + cmd->start_src &= TRIG_INT | TRIG_EXT; + if (!cmd->start_src || tmp != cmd->start_src) + err++; + + tmp = cmd->scan_begin_src; + cmd->scan_begin_src &= TRIG_EXT | TRIG_TIMER; + if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) + err++; + + tmp = cmd->convert_src; + cmd->convert_src &= TRIG_NOW; + if (!cmd->convert_src || tmp != cmd->convert_src) + err++; + + tmp = cmd->scan_end_src; + cmd->scan_end_src &= TRIG_COUNT; + if (!cmd->scan_end_src || tmp != cmd->scan_end_src) + err++; + + tmp = cmd->stop_src; + cmd->stop_src &= TRIG_COUNT | TRIG_EXT | TRIG_NONE; + if (!cmd->stop_src || tmp != cmd->stop_src) + err++; + + if (err) + return 1; + + /* Step 2: make sure trigger sources are unique and mutually + * compatible. */ + + /* these tests are true if more than one _src bit is set */ + if ((cmd->start_src & (cmd->start_src - 1)) != 0) + err++; + if ((cmd->scan_begin_src & (cmd->scan_begin_src - 1)) != 0) + err++; + if ((cmd->convert_src & (cmd->convert_src - 1)) != 0) + err++; + if ((cmd->scan_end_src & (cmd->scan_end_src - 1)) != 0) + err++; + if ((cmd->stop_src & (cmd->stop_src - 1)) != 0) + err++; + + /* There's only one external trigger signal (which makes these + * tests easier). Only one thing can use it. */ + tmp = 0; + if (cmd->start_src & TRIG_EXT) + tmp++; + if (cmd->scan_begin_src & TRIG_EXT) + tmp++; + if (cmd->stop_src & TRIG_EXT) + tmp++; + if (tmp > 1) + err++; + + if (err) + return 2; + + /* Step 3: make sure arguments are trivially compatible. */ + + switch (cmd->start_src) { + case TRIG_INT: + if (cmd->start_arg != 0) { + cmd->start_arg = 0; + err++; + } + break; + case TRIG_EXT: + /* Force to external trigger 0. */ + if ((cmd->start_arg & ~CR_FLAGS_MASK) != 0) { + cmd->start_arg = COMBINE(cmd->start_arg, 0, + ~CR_FLAGS_MASK); + err++; + } + /* The only flag allowed is CR_EDGE, which is ignored. */ + if ((cmd->start_arg & CR_FLAGS_MASK & ~CR_EDGE) != 0) { + cmd->start_arg = COMBINE(cmd->start_arg, 0, + CR_FLAGS_MASK & ~CR_EDGE); + err++; + } + break; + } + + switch (cmd->scan_begin_src) { + case TRIG_TIMER: + if (cmd->scan_begin_arg > MAX_SCAN_PERIOD) { + cmd->scan_begin_arg = MAX_SCAN_PERIOD; + err++; + } + tmp = cmd->chanlist_len * CONVERT_PERIOD; + if (tmp < MIN_SCAN_PERIOD) { + tmp = MIN_SCAN_PERIOD; + } + if (cmd->scan_begin_arg < tmp) { + cmd->scan_begin_arg = tmp; + err++; + } + break; + case TRIG_EXT: + /* Force to external trigger 0. */ + if ((cmd->scan_begin_arg & ~CR_FLAGS_MASK) != 0) { + cmd->scan_begin_arg = COMBINE(cmd->scan_begin_arg, 0, + ~CR_FLAGS_MASK); + err++; + } + /* Only allow flags CR_EDGE and CR_INVERT. Ignore CR_EDGE. */ + if ((cmd->scan_begin_arg & CR_FLAGS_MASK & + ~(CR_EDGE | CR_INVERT)) != 0) { + cmd->scan_begin_arg = COMBINE(cmd->scan_begin_arg, 0, + CR_FLAGS_MASK & ~(CR_EDGE | CR_INVERT)); + err++; + } + break; + } + + /* cmd->convert_src == TRIG_NOW */ + if (cmd->convert_arg != 0) { + cmd->convert_arg = 0; + err++; + } + + /* cmd->scan_end_arg == TRIG_COUNT */ + if (cmd->scan_end_arg != cmd->chanlist_len) { + cmd->scan_end_arg = cmd->chanlist_len; + err++; + } + + switch (cmd->stop_src) { + case TRIG_COUNT: + /* Any count allowed. */ + break; + case TRIG_EXT: + /* Force to external trigger 0. */ + if ((cmd->stop_arg & ~CR_FLAGS_MASK) != 0) { + cmd->stop_arg = COMBINE(cmd->stop_arg, 0, + ~CR_FLAGS_MASK); + err++; + } + /* The only flag allowed is CR_EDGE, which is ignored. */ + if ((cmd->stop_arg & CR_FLAGS_MASK & ~CR_EDGE) != 0) { + cmd->stop_arg = COMBINE(cmd->stop_arg, 0, + CR_FLAGS_MASK & ~CR_EDGE); + } + break; + case TRIG_NONE: + if (cmd->stop_arg != 0) { + cmd->stop_arg = 0; + err++; + } + break; + } + + if (err) + return 3; + + /* Step 4: fix up any arguments. */ + + if (cmd->scan_begin_src == TRIG_TIMER) { + unsigned int div1, div2, round; + int round_mode = cmd->flags & TRIG_ROUND_MASK; + + tmp = cmd->scan_begin_arg; + /* Check whether to use a single timer. */ + switch (round_mode) { + case TRIG_ROUND_NEAREST: + default: + round = TIMEBASE_10MHZ / 2; + break; + case TRIG_ROUND_DOWN: + round = 0; + break; + case TRIG_ROUND_UP: + round = TIMEBASE_10MHZ - 1; + break; + } + /* Be careful to avoid overflow! */ + div2 = cmd->scan_begin_arg / TIMEBASE_10MHZ; + div2 += (round + cmd->scan_begin_arg % TIMEBASE_10MHZ) / + TIMEBASE_10MHZ; + if (div2 <= 0x10000) { + /* A single timer will suffice. */ + if (div2 < 2) + div2 = 2; + cmd->scan_begin_arg = div2 * TIMEBASE_10MHZ; + if (cmd->scan_begin_arg < div2 || + cmd->scan_begin_arg < TIMEBASE_10MHZ) { + /* Overflow! */ + cmd->scan_begin_arg = MAX_SCAN_PERIOD; + } + } else { + /* Use two timers. */ + div1 = devpriv->cached_div1; + div2 = devpriv->cached_div2; + pci224_cascade_ns_to_timer(TIMEBASE_10MHZ, &div1, &div2, + &cmd->scan_begin_arg, round_mode); + devpriv->cached_div1 = div1; + devpriv->cached_div2 = div2; + } + if (tmp != cmd->scan_begin_arg) { + err++; + } + } + + if (err) + return 4; + + /* Step 5: check channel list. */ + + if (cmd->chanlist && (cmd->chanlist_len > 0)) { + unsigned int range; + enum { range_err = 1, dupchan_err = 2, }; + unsigned errors; + unsigned int n; + unsigned int ch; + + /* + * Check all channels have the same range index. Don't care + * about analogue reference, as we can't configure it. + * + * Check the list has no duplicate channels. + */ + range = CR_RANGE(cmd->chanlist[0]); + errors = 0; + tmp = 0; + for (n = 0; n < cmd->chanlist_len; n++) { + ch = CR_CHAN(cmd->chanlist[n]); + if (tmp & (1U << ch)) { + errors |= dupchan_err; + } + tmp |= (1U << ch); + if (CR_RANGE(cmd->chanlist[n]) != range) { + errors |= range_err; + } + } + if (errors) { + if (errors & dupchan_err) { + DPRINTK("comedi%d: " DRIVER_NAME + ": ao_cmdtest: " + "entries in chanlist must contain no " + "duplicate channels\n", dev->minor); + } + if (errors & range_err) { + DPRINTK("comedi%d: " DRIVER_NAME + ": ao_cmdtest: " + "entries in chanlist must all have " + "the same range index\n", dev->minor); + } + err++; + } + } + + if (err) + return 5; + + return 0; +} + +/* + * 'do_cmd' function for AO subdevice. + */ +static int pci224_ao_cmd(struct comedi_device * dev, struct comedi_subdevice * s) +{ + struct comedi_cmd *cmd = &s->async->cmd; + int range; + unsigned int i, j; + unsigned int ch; + unsigned int rank; + unsigned long flags; + + /* Cannot handle null/empty chanlist. */ + if (cmd->chanlist == NULL || cmd->chanlist_len == 0) { + return -EINVAL; + } + + /* Determine which channels are enabled and their load order. */ + devpriv->ao_enab = 0; + + for (i = 0; i < cmd->chanlist_len; i++) { + ch = CR_CHAN(cmd->chanlist[i]); + devpriv->ao_enab |= 1U << ch; + rank = 0; + for (j = 0; j < cmd->chanlist_len; j++) { + if (CR_CHAN(cmd->chanlist[j]) < ch) { + rank++; + } + } + devpriv->ao_scan_order[rank] = i; + } + + /* Set enabled channels. */ + outw(devpriv->ao_enab, dev->iobase + PCI224_DACCEN); + + /* Determine range and polarity. All channels the same. */ + range = CR_RANGE(cmd->chanlist[0]); + + /* + * Set DAC range and polarity. + * Set DAC scan trigger source to 'none'. + * Set DAC FIFO interrupt trigger level to 'not half full'. + * Reset DAC FIFO. + * + * N.B. DAC FIFO interrupts are currently disabled. + */ + devpriv->daccon = COMBINE(devpriv->daccon, + (devpriv->hwrange[range] | PCI224_DACCON_TRIG_NONE | + PCI224_DACCON_FIFOINTR_NHALF), + (PCI224_DACCON_POLAR_MASK | PCI224_DACCON_VREF_MASK | + PCI224_DACCON_TRIG_MASK | PCI224_DACCON_FIFOINTR_MASK)); + outw(devpriv->daccon | PCI224_DACCON_FIFORESET, + dev->iobase + PCI224_DACCON); + + if (cmd->scan_begin_src == TRIG_TIMER) { + unsigned int div1, div2, round; + unsigned int ns = cmd->scan_begin_arg; + int round_mode = cmd->flags & TRIG_ROUND_MASK; + + /* Check whether to use a single timer. */ + switch (round_mode) { + case TRIG_ROUND_NEAREST: + default: + round = TIMEBASE_10MHZ / 2; + break; + case TRIG_ROUND_DOWN: + round = 0; + break; + case TRIG_ROUND_UP: + round = TIMEBASE_10MHZ - 1; + break; + } + /* Be careful to avoid overflow! */ + div2 = cmd->scan_begin_arg / TIMEBASE_10MHZ; + div2 += (round + cmd->scan_begin_arg % TIMEBASE_10MHZ) / + TIMEBASE_10MHZ; + if (div2 <= 0x10000) { + /* A single timer will suffice. */ + if (div2 < 2) + div2 = 2; + div2 &= 0xffff; + div1 = 1; /* Flag that single timer to be used. */ + } else { + /* Use two timers. */ + div1 = devpriv->cached_div1; + div2 = devpriv->cached_div2; + pci224_cascade_ns_to_timer(TIMEBASE_10MHZ, &div1, &div2, + &ns, round_mode); + } + + /* + * The output of timer Z2-0 will be used as the scan trigger + * source. + */ + /* Make sure Z2-0 is gated on. */ + outb(GAT_CONFIG(0, GAT_VCC), + devpriv->iobase1 + PCI224_ZGAT_SCE); + if (div1 == 1) { + /* Not cascading. Z2-0 needs 10 MHz clock. */ + outb(CLK_CONFIG(0, CLK_10MHZ), + devpriv->iobase1 + PCI224_ZCLK_SCE); + } else { + /* Cascading with Z2-2. */ + /* Make sure Z2-2 is gated on. */ + outb(GAT_CONFIG(2, GAT_VCC), + devpriv->iobase1 + PCI224_ZGAT_SCE); + /* Z2-2 needs 10 MHz clock. */ + outb(CLK_CONFIG(2, CLK_10MHZ), + devpriv->iobase1 + PCI224_ZCLK_SCE); + /* Load Z2-2 mode (2) and counter (div1). */ + i8254_load(devpriv->iobase1 + PCI224_Z2_CT0, 0, + 2, div1, 2); + /* Z2-0 is clocked from Z2-2's output. */ + outb(CLK_CONFIG(0, CLK_OUTNM1), + devpriv->iobase1 + PCI224_ZCLK_SCE); + } + /* Load Z2-0 mode (2) and counter (div2). */ + i8254_load(devpriv->iobase1 + PCI224_Z2_CT0, 0, 0, div2, 2); + } + + /* + * Sort out end of acquisition. + */ + switch (cmd->stop_src) { + case TRIG_COUNT: + /* Fixed number of scans. */ + devpriv->ao_stop_continuous = 0; + devpriv->ao_stop_count = cmd->stop_arg; + break; + default: + /* Continuous scans. */ + devpriv->ao_stop_continuous = 1; + devpriv->ao_stop_count = 0; + break; + } + + /* + * Sort out start of acquisition. + */ + switch (cmd->start_src) { + case TRIG_INT: + comedi_spin_lock_irqsave(&devpriv->ao_spinlock, flags); + s->async->inttrig = &pci224_ao_inttrig_start; + comedi_spin_unlock_irqrestore(&devpriv->ao_spinlock, flags); + break; + case TRIG_EXT: + /* Enable external interrupt trigger to start acquisition. */ + comedi_spin_lock_irqsave(&devpriv->ao_spinlock, flags); + devpriv->intsce |= PCI224_INTR_EXT; + outb(devpriv->intsce, devpriv->iobase1 + PCI224_INT_SCE); + comedi_spin_unlock_irqrestore(&devpriv->ao_spinlock, flags); + break; + } + + return 0; +} + +/* + * 'cancel' function for AO subdevice. + */ +static int pci224_ao_cancel(struct comedi_device * dev, struct comedi_subdevice * s) +{ + pci224_ao_stop(dev, s); + return 0; +} + +/* + * 'munge' data for AO command. + */ +static void +pci224_ao_munge(struct comedi_device * dev, struct comedi_subdevice * s, void *data, + unsigned int num_bytes, unsigned int chan_index) +{ + struct comedi_async *async = s->async; + short *array = data; + unsigned int length = num_bytes / sizeof(*array); + unsigned int offset; + unsigned int shift; + unsigned int i; + + /* The hardware expects 16-bit numbers. */ + shift = 16 - thisboard->ao_bits; + /* Channels will be all bipolar or all unipolar. */ + if ((devpriv->hwrange[CR_RANGE(async->cmd.chanlist[0])] & + PCI224_DACCON_POLAR_MASK) == PCI224_DACCON_POLAR_UNI) { + /* Unipolar */ + offset = 0; + } else { + /* Bipolar */ + offset = 32768; + } + /* Munge the data. */ + for (i = 0; i < length; i++) { + array[i] = (array[i] << shift) - offset; + } +} + +/* + * Interrupt handler. + */ +static irqreturn_t pci224_interrupt(int irq, void *d PT_REGS_ARG) +{ + struct comedi_device *dev = d; + struct comedi_subdevice *s = &dev->subdevices[0]; + struct comedi_cmd *cmd; + unsigned char intstat, valid_intstat; + unsigned char curenab; + int retval = 0; + unsigned long flags; + + intstat = inb(devpriv->iobase1 + PCI224_INT_SCE) & 0x3F; + if (intstat) { + retval = 1; + comedi_spin_lock_irqsave(&devpriv->ao_spinlock, flags); + valid_intstat = devpriv->intsce & intstat; + /* Temporarily disable interrupt sources. */ + curenab = devpriv->intsce & ~intstat; + outb(curenab, devpriv->iobase1 + PCI224_INT_SCE); + devpriv->intr_running = 1; + devpriv->intr_cpuid = THISCPU; + comedi_spin_unlock_irqrestore(&devpriv->ao_spinlock, flags); + if (valid_intstat != 0) { + cmd = &s->async->cmd; + if (valid_intstat & PCI224_INTR_EXT) { + devpriv->intsce &= ~PCI224_INTR_EXT; + if (cmd->start_src == TRIG_EXT) { + pci224_ao_start(dev, s); + } else if (cmd->stop_src == TRIG_EXT) { + pci224_ao_stop(dev, s); + } + } + if (valid_intstat & PCI224_INTR_DAC) { + pci224_ao_handle_fifo(dev, s); + } + } + /* Reenable interrupt sources. */ + comedi_spin_lock_irqsave(&devpriv->ao_spinlock, flags); + if (curenab != devpriv->intsce) { + outb(devpriv->intsce, + devpriv->iobase1 + PCI224_INT_SCE); + } + devpriv->intr_running = 0; + comedi_spin_unlock_irqrestore(&devpriv->ao_spinlock, flags); + } + return IRQ_RETVAL(retval); +} + +/* + * This function looks for a PCI device matching the requested board name, + * bus and slot. + */ +static int +pci224_find_pci(struct comedi_device * dev, int bus, int slot, + struct pci_dev **pci_dev_p) +{ + struct pci_dev *pci_dev = NULL; + + *pci_dev_p = NULL; + + /* Look for matching PCI device. */ + for (pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, PCI_ANY_ID, NULL); + pci_dev != NULL; + pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, PCI_ANY_ID, + pci_dev)) { + /* If bus/slot specified, check them. */ + if (bus || slot) { + if (bus != pci_dev->bus->number + || slot != PCI_SLOT(pci_dev->devfn)) + continue; + } + if (thisboard->model == any_model) { + /* Match any supported model. */ + int i; + + for (i = 0; i < ARRAY_SIZE(pci224_boards); i++) { + if (pci_dev->device == pci224_boards[i].devid) { + /* Change board_ptr to matched board. */ + dev->board_ptr = &pci224_boards[i]; + break; + } + } + if (i == ARRAY_SIZE(pci224_boards)) + continue; + } else { + /* Match specific model name. */ + if (thisboard->devid != pci_dev->device) + continue; + } + + /* Found a match. */ + *pci_dev_p = pci_dev; + return 0; + } + /* No match found. */ + if (bus || slot) { + printk(KERN_ERR "comedi%d: error! " + "no %s found at pci %02x:%02x!\n", + dev->minor, thisboard->name, bus, slot); + } else { + printk(KERN_ERR "comedi%d: error! no %s found!\n", + dev->minor, thisboard->name); + } + return -EIO; +} + +/* + * Attach is called by the Comedi core to configure the driver + * for a particular board. If you specified a board_name array + * in the driver structure, dev->board_ptr contains that + * address. + */ +static int pci224_attach(struct comedi_device * dev, struct comedi_devconfig * it) +{ + struct comedi_subdevice *s; + struct pci_dev *pci_dev; + unsigned int irq; + int bus = 0, slot = 0; + unsigned n; + int ret; + + printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor, DRIVER_NAME); + + bus = it->options[0]; + slot = it->options[1]; + if ((ret = alloc_private(dev, sizeof(struct pci224_private))) < 0) { + printk(KERN_ERR "comedi%d: error! out of memory!\n", + dev->minor); + return ret; + } + if ((ret = pci224_find_pci(dev, bus, slot, &pci_dev)) < 0) + return ret; + devpriv->pci_dev = pci_dev; + + if ((ret = comedi_pci_enable(pci_dev, DRIVER_NAME)) < 0) { + printk(KERN_ERR + "comedi%d: error! cannot enable PCI device " + "and request regions!\n", dev->minor); + return ret; + } + spin_lock_init(&devpriv->ao_spinlock); + + devpriv->iobase1 = pci_resource_start(pci_dev, 2); + dev->iobase = pci_resource_start(pci_dev, 3); + irq = pci_dev->irq; + + /* Allocate readback buffer for AO channels. */ + devpriv->ao_readback = kmalloc(sizeof(devpriv->ao_readback[0]) * + thisboard->ao_chans, GFP_KERNEL); + if (!devpriv->ao_readback) { + return -ENOMEM; + } + + /* Allocate buffer to hold values for AO channel scan. */ + devpriv->ao_scan_vals = kmalloc(sizeof(devpriv->ao_scan_vals[0]) * + thisboard->ao_chans, GFP_KERNEL); + if (!devpriv->ao_scan_vals) { + return -ENOMEM; + } + + /* Allocate buffer to hold AO channel scan order. */ + devpriv->ao_scan_order = kmalloc(sizeof(devpriv->ao_scan_order[0]) * + thisboard->ao_chans, GFP_KERNEL); + if (!devpriv->ao_scan_order) { + return -ENOMEM; + } + + /* Disable interrupt sources. */ + devpriv->intsce = 0; + outb(0, devpriv->iobase1 + PCI224_INT_SCE); + + /* Initialize the DAC hardware. */ + outw(PCI224_DACCON_GLOBALRESET, dev->iobase + PCI224_DACCON); + outw(0, dev->iobase + PCI224_DACCEN); + outw(0, dev->iobase + PCI224_FIFOSIZ); + devpriv->daccon = (PCI224_DACCON_TRIG_SW | PCI224_DACCON_POLAR_BI | + PCI224_DACCON_FIFOENAB | PCI224_DACCON_FIFOINTR_EMPTY); + outw(devpriv->daccon | PCI224_DACCON_FIFORESET, + dev->iobase + PCI224_DACCON); + + /* Allocate subdevices. There is only one! */ + if ((ret = alloc_subdevices(dev, 1)) < 0) { + printk(KERN_ERR "comedi%d: error! out of memory!\n", + dev->minor); + return ret; + } + + s = dev->subdevices + 0; + /* Analog output subdevice. */ + s->type = COMEDI_SUBD_AO; + s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE; + s->n_chan = thisboard->ao_chans; + s->maxdata = (1 << thisboard->ao_bits) - 1; + s->insn_write = &pci224_ao_insn_write; + s->insn_read = &pci224_ao_insn_read; + s->len_chanlist = s->n_chan; + + dev->write_subdev = s; + s->do_cmd = &pci224_ao_cmd; + s->do_cmdtest = &pci224_ao_cmdtest; + s->cancel = &pci224_ao_cancel; + s->munge = &pci224_ao_munge; + + /* Sort out channel range options. */ + if (thisboard->model == pci234_model) { + /* PCI234 range options. */ + const struct comedi_lrange **range_table_list; + + s->range_table_list = range_table_list = + kmalloc(sizeof(struct comedi_lrange *) * s->n_chan, + GFP_KERNEL); + if (!s->range_table_list) { + return -ENOMEM; + } + for (n = 2; n < 3 + s->n_chan; n++) { + if (it->options[n] < 0 || it->options[n] > 1) { + printk(KERN_WARNING "comedi%d: %s: warning! " + "bad options[%u]=%d\n", + dev->minor, DRIVER_NAME, n, + it->options[n]); + } + } + for (n = 0; n < s->n_chan; n++) { + if (n < COMEDI_NDEVCONFOPTS - 3 && + it->options[3 + n] == 1) { + if (it->options[2] == 1) { + range_table_list[n] = &range_pci234_ext; + } else { + range_table_list[n] = &range_bipolar5; + } + } else { + if (it->options[2] == 1) { + range_table_list[n] = + &range_pci234_ext2; + } else { + range_table_list[n] = &range_bipolar10; + } + } + } + devpriv->hwrange = hwrange_pci234; + } else { + /* PCI224 range options. */ + if (it->options[2] == 1) { + s->range_table = &range_pci224_external; + devpriv->hwrange = hwrange_pci224_external; + } else { + if (it->options[2] != 0) { + printk(KERN_WARNING "comedi%d: %s: warning! " + "bad options[2]=%d\n", + dev->minor, DRIVER_NAME, + it->options[2]); + } + s->range_table = &range_pci224_internal; + devpriv->hwrange = hwrange_pci224_internal; + } + } + + dev->board_name = thisboard->name; + + if (irq) { + ret = comedi_request_irq(irq, pci224_interrupt, IRQF_SHARED, + DRIVER_NAME, dev); + if (ret < 0) { + printk(KERN_ERR "comedi%d: error! " + "unable to allocate irq %u\n", dev->minor, irq); + return ret; + } else { + dev->irq = irq; + } + } + + printk(KERN_INFO "comedi%d: %s ", dev->minor, dev->board_name); + printk("(pci %s) ", pci_name(pci_dev)); + if (irq) { + printk("(irq %u%s) ", irq, (dev->irq ? "" : " UNAVAILABLE")); + } else { + printk("(no irq) "); + } + + printk("attached\n"); + + return 1; +} + +/* + * _detach is called to deconfigure a device. It should deallocate + * resources. + * This function is also called when _attach() fails, so it should be + * careful not to release resources that were not necessarily + * allocated by _attach(). dev->private and dev->subdevices are + * deallocated automatically by the core. + */ +static int pci224_detach(struct comedi_device * dev) +{ + printk(KERN_DEBUG "comedi%d: %s: detach\n", dev->minor, DRIVER_NAME); + + if (dev->irq) { + comedi_free_irq(dev->irq, dev); + } + if (dev->subdevices) { + struct comedi_subdevice *s; + + s = dev->subdevices + 0; + /* AO subdevice */ + if (s->range_table_list) { + kfree(s->range_table_list); + } + } + if (devpriv) { + if (devpriv->ao_readback) { + kfree(devpriv->ao_readback); + } + if (devpriv->ao_scan_vals) { + kfree(devpriv->ao_scan_vals); + } + if (devpriv->ao_scan_order) { + kfree(devpriv->ao_scan_order); + } + if (devpriv->pci_dev) { + if (dev->iobase) { + comedi_pci_disable(devpriv->pci_dev); + } + pci_dev_put(devpriv->pci_dev); + } + } + if (dev->board_name) { + printk(KERN_INFO "comedi%d: %s removed\n", + dev->minor, dev->board_name); + } + + return 0; +} |