--- /dev/null
+ /*
+ comedi/drivers/amplc_pci230.c
+ Driver for Amplicon PCI230 and PCI260 Multifunction I/O boards.
+
+ Copyright (C) 2001 Allan Willcox <allanwillcox@ozemail.com.au>
+
+ COMEDI - Linux Control and Measurement Device Interface
+ Copyright (C) 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_pci230
+Description: Amplicon PCI230, PCI260 Multifunction I/O boards
+Author: Allan Willcox <allanwillcox@ozemail.com.au>,
+ Steve D Sharples <steve.sharples@nottingham.ac.uk>,
+ Ian Abbott <abbotti@mev.co.uk>
+Updated: Wed, 22 Oct 2008 12:34:49 +0100
+Devices: [Amplicon] PCI230 (pci230 or amplc_pci230),
+ PCI230+ (pci230+ or amplc_pci230),
+ PCI260 (pci260 or amplc_pci230), PCI260+ (pci260+ or amplc_pci230)
+Status: works
+
+Configuration options:
+ [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.
+
+Configuring a "amplc_pci230" will match any supported card and it will
+choose the best match, picking the "+" models if possible. Configuring
+a "pci230" will match a PCI230 or PCI230+ card and it will be treated as
+a PCI230. Configuring a "pci260" will match a PCI260 or PCI260+ card
+and it will be treated as a PCI260. Configuring a "pci230+" will match
+a PCI230+ card. Configuring a "pci260+" will match a PCI260+ card.
+
+Subdevices:
+
+ PCI230(+) PCI260(+)
+ --------- ---------
+ Subdevices 3 1
+ 0 AI AI
+ 1 AO
+ 2 DIO
+
+AI Subdevice:
+
+ The AI subdevice has 16 single-ended channels or 8 differential
+ channels.
+
+ The PCI230 and PCI260 cards have 12-bit resolution. The PCI230+ and
+ PCI260+ cards have 16-bit resolution.
+
+ For differential mode, use inputs 2N and 2N+1 for channel N (e.g. use
+ inputs 14 and 15 for channel 7). If the card is physically a PCI230
+ or PCI260 then it actually uses a "pseudo-differential" mode where the
+ inputs are sampled a few microseconds apart. The PCI230+ and PCI260+
+ use true differential sampling. Another difference is that if the
+ card is physically a PCI230 or PCI260, the inverting input is 2N,
+ whereas for a PCI230+ or PCI260+ the inverting input is 2N+1. So if a
+ PCI230 is physically replaced by a PCI230+ (or a PCI260 with a
+ PCI260+) and differential mode is used, the differential inputs need
+ to be physically swapped on the connector.
+
+ The following input ranges are supported:
+
+ 0 => [-10, +10] V
+ 1 => [-5, +5] V
+ 2 => [-2.5, +2.5] V
+ 3 => [-1.25, +1.25] V
+ 4 => [0, 10] V
+ 5 => [0, 5] V
+ 6 => [0, 2.5] V
+
+AI Commands:
+
+ +=========+==============+===========+============+==========+
+ |start_src|scan_begin_src|convert_src|scan_end_src| stop_src |
+ +=========+==============+===========+============+==========+
+ |TRIG_NOW | TRIG_FOLLOW |TRIG_TIMER | TRIG_COUNT |TRIG_NONE |
+ |TRIG_INT | |TRIG_EXT(3)| |TRIG_COUNT|
+ | | |TRIG_INT | | |
+ | |--------------|-----------| | |
+ | | TRIG_TIMER(1)|TRIG_TIMER | | |
+ | | TRIG_EXT(2) | | | |
+ | | TRIG_INT | | | |
+ +---------+--------------+-----------+------------+----------+
+
+ Note 1: If AI command and AO command are used simultaneously, only
+ one may have scan_begin_src == TRIG_TIMER.
+
+ Note 2: For PCI230 and PCI230+, scan_begin_src == TRIG_EXT uses
+ DIO channel 16 (pin 49) which will need to be configured as
+ a digital input. For PCI260+, the EXTTRIG/EXTCONVCLK input
+ (pin 17) is used instead. For PCI230, scan_begin_src ==
+ TRIG_EXT is not supported. The trigger is a rising edge
+ on the input.
+
+ Note 3: For convert_src == TRIG_EXT, the EXTTRIG/EXTCONVCLK input
+ (pin 25 on PCI230(+), pin 17 on PCI260(+)) is used. The
+ convert_arg value is interpreted as follows:
+
+ convert_arg == (CR_EDGE | 0) => rising edge
+ convert_arg == (CR_EDGE | CR_INVERT | 0) => falling edge
+ convert_arg == 0 => falling edge (backwards compatibility)
+ convert_arg == 1 => rising edge (backwards compatibility)
+
+ All entries in the channel list must use the same analogue reference.
+ If the analogue reference is not AREF_DIFF (not differential) each
+ pair of channel numbers (0 and 1, 2 and 3, etc.) must use the same
+ input range. The input ranges used in the sequence must be all
+ bipolar (ranges 0 to 3) or all unipolar (ranges 4 to 6). The channel
+ sequence must consist of 1 or more identical subsequences. Within the
+ subsequence, channels must be in ascending order with no repeated
+ channels. For example, the following sequences are valid: 0 1 2 3
+ (single valid subsequence), 0 2 3 5 0 2 3 5 (repeated valid
+ subsequence), 1 1 1 1 (repeated valid subsequence). The following
+ sequences are invalid: 0 3 2 1 (invalid subsequence), 0 2 3 5 0 2 3
+ (incompletely repeated subsequence). Some versions of the PCI230+ and
+ PCI260+ have a bug that requires a subsequence longer than one entry
+ long to include channel 0.
+
+AO Subdevice:
+
+ The AO subdevice has 2 channels with 12-bit resolution.
+
+ The following output ranges are supported:
+
+ 0 => [0, 10] V
+ 1 => [-10, +10] V
+
+AO Commands:
+
+ +=========+==============+===========+============+==========+
+ |start_src|scan_begin_src|convert_src|scan_end_src| stop_src |
+ +=========+==============+===========+============+==========+
+ |TRIG_INT | TRIG_TIMER(1)| TRIG_NOW | TRIG_COUNT |TRIG_NONE |
+ | | TRIG_EXT(2) | | |TRIG_COUNT|
+ | | TRIG_INT | | | |
+ +---------+--------------+-----------+------------+----------+
+
+ Note 1: If AI command and AO command are used simultaneously, only
+ one may have scan_begin_src == TRIG_TIMER.
+
+ Note 2: scan_begin_src == TRIG_EXT is only supported if the card is
+ configured as a PCI230+ and is only supported on later
+ versions of the card. As a card configured as a PCI230+ is
+ not guaranteed to support external triggering, please consider
+ this support to be a bonus. It uses the EXTTRIG/ EXTCONVCLK
+ input (PCI230+ pin 25). Triggering will be on the rising edge
+ unless the CR_INVERT flag is set in scan_begin_arg.
+
+ The channels in the channel sequence must be in ascending order with
+ no repeats. All entries in the channel sequence must use the same
+ output range.
+
+DIO Subdevice:
+
+ The DIO subdevice is a 8255 chip providing 24 DIO channels. The DIO
+ channels are configurable as inputs or outputs in four groups:
+
+ Port A - channels 0 to 7
+ Port B - channels 8 to 15
+ Port CL - channels 16 to 19
+ Port CH - channels 20 to 23
+
+ Only mode 0 of the 8255 chip is supported.
+
+ Bit 0 of port C (DIO channel 16) is also used as an external scan
+ trigger input for AI commands on PCI230 and PCI230+, so would need to
+ be configured as an input to use it for that purpose.
+*/
+/*
+Extra triggered scan functionality, interrupt bug-fix added by Steve Sharples.
+Support for PCI230+/260+, more triggered scan functionality, and workarounds
+for (or detection of) various hardware problems added by Ian Abbott.
+*/
+#include "../comedidev.h"
+
+#include <linux/delay.h>
+
+#include "comedi_pci.h"
+#include "8253.h"
+#include "8255.h"
+
+/* PCI230 PCI configuration register information */
+#define PCI_VENDOR_ID_AMPLICON 0x14dc
+#define PCI_DEVICE_ID_PCI230 0x0000
+#define PCI_DEVICE_ID_PCI260 0x0006
+#define PCI_DEVICE_ID_INVALID 0xffff
+
+#define PCI230_IO1_SIZE 32 /* Size of I/O space 1 */
+#define PCI230_IO2_SIZE 16 /* Size of I/O space 2 */
+
+/* PCI230 i/o space 1 registers. */
+#define PCI230_PPI_X_BASE 0x00 /* User PPI (82C55) base */
+#define PCI230_PPI_X_A 0x00 /* User PPI (82C55) port A */
+#define PCI230_PPI_X_B 0x01 /* User PPI (82C55) port B */
+#define PCI230_PPI_X_C 0x02 /* User PPI (82C55) port C */
+#define PCI230_PPI_X_CMD 0x03 /* User PPI (82C55) control word */
+#define PCI230_Z2_CT_BASE 0x14 /* 82C54 counter/timer base */
+#define PCI230_Z2_CT0 0x14 /* 82C54 counter/timer 0 */
+#define PCI230_Z2_CT1 0x15 /* 82C54 counter/timer 1 */
+#define PCI230_Z2_CT2 0x16 /* 82C54 counter/timer 2 */
+#define PCI230_Z2_CTC 0x17 /* 82C54 counter/timer control word */
+#define PCI230_ZCLK_SCE 0x1A /* Group Z Clock Configuration */
+#define PCI230_ZGAT_SCE 0x1D /* Group Z Gate Configuration */
+#define PCI230_INT_SCE 0x1E /* Interrupt source mask (w) */
+#define PCI230_INT_STAT 0x1E /* Interrupt status (r) */
+
+/* PCI230 i/o space 2 registers. */
+#define PCI230_DACCON 0x00 /* DAC control */
+#define PCI230_DACOUT1 0x02 /* DAC channel 0 (w) */
+#define PCI230_DACOUT2 0x04 /* DAC channel 1 (w) (not FIFO mode) */
+#define PCI230_ADCDATA 0x08 /* ADC data (r) */
+#define PCI230_ADCSWTRIG 0x08 /* ADC software trigger (w) */
+#define PCI230_ADCCON 0x0A /* ADC control */
+#define PCI230_ADCEN 0x0C /* ADC channel enable bits */
+#define PCI230_ADCG 0x0E /* ADC gain control bits */
+/* PCI230+ i/o space 2 additional registers. */
+#define PCI230P_ADCTRIG 0x10 /* ADC start acquisition trigger */
+#define PCI230P_ADCTH 0x12 /* ADC analog trigger threshold */
+#define PCI230P_ADCFFTH 0x14 /* ADC FIFO interrupt threshold */
+#define PCI230P_ADCFFLEV 0x16 /* ADC FIFO level (r) */
+#define PCI230P_ADCPTSC 0x18 /* ADC pre-trigger sample count (r) */
+#define PCI230P_ADCHYST 0x1A /* ADC analog trigger hysteresys */
+#define PCI230P_EXTFUNC 0x1C /* Extended functions */
+#define PCI230P_HWVER 0x1E /* Hardware version (r) */
+/* PCI230+ hardware version 2 onwards. */
+#define PCI230P2_DACDATA 0x02 /* DAC data (FIFO mode) (w) */
+#define PCI230P2_DACSWTRIG 0x02 /* DAC soft trigger (FIFO mode) (r) */
+#define PCI230P2_DACEN 0x06 /* DAC channel enable (FIFO mode) */
+
+/* Convertor related constants. */
+#define PCI230_DAC_SETTLE 5 /* Analogue output settling time in µs */
+ /* (DAC itself is 1µs nominally). */
+#define PCI230_ADC_SETTLE 1 /* Analogue input settling time in µs */
+ /* (ADC itself is 1.6µs nominally but we poll
+ * anyway). */
+#define PCI230_MUX_SETTLE 10 /* ADC MUX settling time in µS */
+ /* - 10µs for se, 20µs de. */
+
+/* DACCON read-write values. */
+#define PCI230_DAC_OR_UNI (0<<0) /* Output range unipolar */
+#define PCI230_DAC_OR_BIP (1<<0) /* Output range bipolar */
+#define PCI230_DAC_OR_MASK (1<<0)
+/* The following applies only if DAC FIFO support is enabled in the EXTFUNC
+ * register (and only for PCI230+ hardware version 2 onwards). */
+#define PCI230P2_DAC_FIFO_EN (1<<8) /* FIFO enable */
+/* The following apply only if the DAC FIFO is enabled (and only for PCI230+
+ * hardware version 2 onwards). */
+#define PCI230P2_DAC_TRIG_NONE (0<<2) /* No trigger */
+#define PCI230P2_DAC_TRIG_SW (1<<2) /* Software trigger trigger */
+#define PCI230P2_DAC_TRIG_EXTP (2<<2) /* EXTTRIG +ve edge trigger */
+#define PCI230P2_DAC_TRIG_EXTN (3<<2) /* EXTTRIG -ve edge trigger */
+#define PCI230P2_DAC_TRIG_Z2CT0 (4<<2) /* CT0-OUT +ve edge trigger */
+#define PCI230P2_DAC_TRIG_Z2CT1 (5<<2) /* CT1-OUT +ve edge trigger */
+#define PCI230P2_DAC_TRIG_Z2CT2 (6<<2) /* CT2-OUT +ve edge trigger */
+#define PCI230P2_DAC_TRIG_MASK (7<<2)
+#define PCI230P2_DAC_FIFO_WRAP (1<<7) /* FIFO wraparound mode */
+#define PCI230P2_DAC_INT_FIFO_EMPTY (0<<9) /* FIFO interrupt empty */
+#define PCI230P2_DAC_INT_FIFO_NEMPTY (1<<9)
+#define PCI230P2_DAC_INT_FIFO_NHALF (2<<9) /* FIFO intr not half full */
+#define PCI230P2_DAC_INT_FIFO_HALF (3<<9)
+#define PCI230P2_DAC_INT_FIFO_NFULL (4<<9) /* FIFO interrupt not full */
+#define PCI230P2_DAC_INT_FIFO_FULL (5<<9)
+#define PCI230P2_DAC_INT_FIFO_MASK (7<<9)
+
+/* DACCON read-only values. */
+#define PCI230_DAC_BUSY (1<<1) /* DAC busy. */
+/* The following apply only if the DAC FIFO is enabled (and only for PCI230+
+ * hardware version 2 onwards). */
+#define PCI230P2_DAC_FIFO_UNDERRUN_LATCHED (1<<5) /* Underrun error */
+#define PCI230P2_DAC_FIFO_EMPTY (1<<13) /* FIFO empty */
+#define PCI230P2_DAC_FIFO_FULL (1<<14) /* FIFO full */
+#define PCI230P2_DAC_FIFO_HALF (1<<15) /* FIFO half full */
+
+/* DACCON write-only, transient values. */
+/* The following apply only if the DAC FIFO is enabled (and only for PCI230+
+ * hardware version 2 onwards). */
+#define PCI230P2_DAC_FIFO_UNDERRUN_CLEAR (1<<5) /* Clear underrun */
+#define PCI230P2_DAC_FIFO_RESET (1<<12) /* FIFO reset */
+
+/* PCI230+ hardware version 2 DAC FIFO levels. */
+#define PCI230P2_DAC_FIFOLEVEL_HALF 512
+#define PCI230P2_DAC_FIFOLEVEL_FULL 1024
+/* Free space in DAC FIFO. */
+#define PCI230P2_DAC_FIFOROOM_EMPTY PCI230P2_DAC_FIFOLEVEL_FULL
+#define PCI230P2_DAC_FIFOROOM_ONETOHALF \
+ (PCI230P2_DAC_FIFOLEVEL_FULL - PCI230P2_DAC_FIFOLEVEL_HALF)
+#define PCI230P2_DAC_FIFOROOM_HALFTOFULL 1
+#define PCI230P2_DAC_FIFOROOM_FULL 0
+
+/* ADCCON read/write values. */
+#define PCI230_ADC_TRIG_NONE (0<<0) /* No trigger */
+#define PCI230_ADC_TRIG_SW (1<<0) /* Software trigger trigger */
+#define PCI230_ADC_TRIG_EXTP (2<<0) /* EXTTRIG +ve edge trigger */
+#define PCI230_ADC_TRIG_EXTN (3<<0) /* EXTTRIG -ve edge trigger */
+#define PCI230_ADC_TRIG_Z2CT0 (4<<0) /* CT0-OUT +ve edge trigger */
+#define PCI230_ADC_TRIG_Z2CT1 (5<<0) /* CT1-OUT +ve edge trigger */
+#define PCI230_ADC_TRIG_Z2CT2 (6<<0) /* CT2-OUT +ve edge trigger */
+#define PCI230_ADC_TRIG_MASK (7<<0)
+#define PCI230_ADC_IR_UNI (0<<3) /* Input range unipolar */
+#define PCI230_ADC_IR_BIP (1<<3) /* Input range bipolar */
+#define PCI230_ADC_IR_MASK (1<<3)
+#define PCI230_ADC_IM_SE (0<<4) /* Input mode single ended */
+#define PCI230_ADC_IM_DIF (1<<4) /* Input mode differential */
+#define PCI230_ADC_IM_MASK (1<<4)
+#define PCI230_ADC_FIFO_EN (1<<8) /* FIFO enable */
+#define PCI230_ADC_INT_FIFO_EMPTY (0<<9)
+#define PCI230_ADC_INT_FIFO_NEMPTY (1<<9) /* FIFO interrupt not empty */
+#define PCI230_ADC_INT_FIFO_NHALF (2<<9)
+#define PCI230_ADC_INT_FIFO_HALF (3<<9) /* FIFO interrupt half full */
+#define PCI230_ADC_INT_FIFO_NFULL (4<<9)
+#define PCI230_ADC_INT_FIFO_FULL (5<<9) /* FIFO interrupt full */
+#define PCI230P_ADC_INT_FIFO_THRESH (7<<9) /* FIFO interrupt threshold */
+#define PCI230_ADC_INT_FIFO_MASK (7<<9)
+
+/* ADCCON write-only, transient values. */
+#define PCI230_ADC_FIFO_RESET (1<<12) /* FIFO reset */
+#define PCI230_ADC_GLOB_RESET (1<<13) /* Global reset */
+
+/* ADCCON read-only values. */
+#define PCI230_ADC_BUSY (1<<15) /* ADC busy */
+#define PCI230_ADC_FIFO_EMPTY (1<<12) /* FIFO empty */
+#define PCI230_ADC_FIFO_FULL (1<<13) /* FIFO full */
+#define PCI230_ADC_FIFO_HALF (1<<14) /* FIFO half full */
+#define PCI230_ADC_FIFO_FULL_LATCHED (1<<5) /* Indicates overrun occurred */
+
+/* PCI230 ADC FIFO levels. */
+#define PCI230_ADC_FIFOLEVEL_HALFFULL 2049 /* Value for FIFO half full */
+#define PCI230_ADC_FIFOLEVEL_FULL 4096 /* FIFO size */
+
+/* Value to write to ADCSWTRIG to trigger ADC conversion in software trigger
+ * mode. Can be anything. */
+#define PCI230_ADC_CONV 0xffff
+
+/* PCI230+ EXTFUNC values. */
+#define PCI230P_EXTFUNC_GAT_EXTTRIG (1<<0)
+ /* Route EXTTRIG pin to external gate inputs. */
+/* PCI230+ hardware version 2 values. */
+#define PCI230P2_EXTFUNC_DACFIFO (1<<1)
+ /* Allow DAC FIFO to be enabled. */
+
+/*
+ * 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 /* external gate input (PPCn on PCI230) */
+#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 PCI230 and PCI260:
+ *
+ * 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 enables/status register values. */
+#define PCI230_INT_DISABLE 0
+#define PCI230_INT_PPI_C0 (1<<0)
+#define PCI230_INT_PPI_C3 (1<<1)
+#define PCI230_INT_ADC (1<<2)
+#define PCI230_INT_ZCLK_CT1 (1<<5)
+/* For PCI230+ hardware version 2 when DAC FIFO enabled. */
+#define PCI230P2_INT_DAC (1<<4)
+
+#define PCI230_TEST_BIT(val, n) ((val>>n)&1)
+ /* Assumes bits numbered with zero offset, ie. 0-15 */
+
+/* (Potentially) shared resources and their owners */
+enum {
+ RES_Z2CT0, /* Z2-CT0 */
+ RES_Z2CT1, /* Z2-CT1 */
+ RES_Z2CT2, /* Z2-CT2 */
+ NUM_RESOURCES /* Number of (potentially) shared resources. */
+};
+
+enum {
+ OWNER_NONE, /* Not owned */
+ OWNER_AICMD, /* Owned by AI command */
+ OWNER_AOCMD /* Owned by AO command */
+};
+
+/*
+ * 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 flags for atomic bit operations */
+#define AI_CMD_STARTED 0
+#define AO_CMD_STARTED 1
+
+/*
+ * Board descriptions for the two boards supported.
+ */
+
+struct pci230_board {
+ const char *name;
+ unsigned short id;
+ int ai_chans;
+ int ai_bits;
+ int ao_chans;
+ int ao_bits;
+ int have_dio;
+ unsigned int min_hwver; /* Minimum hardware version supported. */
+};
+static const struct pci230_board pci230_boards[] = {
+ {
+ name: "pci230+",
+ id: PCI_DEVICE_ID_PCI230,
+ ai_chans:16,
+ ai_bits: 16,
+ ao_chans:2,
+ ao_bits: 12,
+ have_dio:1,
+ min_hwver:1,
+ },
+ {
+ name: "pci260+",
+ id: PCI_DEVICE_ID_PCI260,
+ ai_chans:16,
+ ai_bits: 16,
+ ao_chans:0,
+ ao_bits: 0,
+ have_dio:0,
+ min_hwver:1,
+ },
+ {
+ name: "pci230",
+ id: PCI_DEVICE_ID_PCI230,
+ ai_chans:16,
+ ai_bits: 12,
+ ao_chans:2,
+ ao_bits: 12,
+ have_dio:1,
+ },
+ {
+ name: "pci260",
+ id: PCI_DEVICE_ID_PCI260,
+ ai_chans:16,
+ ai_bits: 12,
+ ao_chans:0,
+ ao_bits: 0,
+ have_dio:0,
+ },
+ {
+ name: "amplc_pci230", /* Wildcard matches any above */
+ id: PCI_DEVICE_ID_INVALID,
+ },
+};
+
+static DEFINE_PCI_DEVICE_TABLE(pci230_pci_table) = {
+ {PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_PCI230, PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0, 0},
+ {PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_PCI260, PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0, 0},
+ {0}
+};
+
+MODULE_DEVICE_TABLE(pci, pci230_pci_table);
+/*
+ * Useful for shorthand access to the particular board structure
+ */
+#define n_pci230_boards (sizeof(pci230_boards)/sizeof(pci230_boards[0]))
+#define thisboard ((const struct pci230_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 pci230_private {
+ struct pci_dev *pci_dev;
+ spinlock_t isr_spinlock; /* Interrupt spin lock */
+ spinlock_t res_spinlock; /* Shared resources spin lock */
+ spinlock_t ai_stop_spinlock; /* Spin lock for stopping AI command */
+ spinlock_t ao_stop_spinlock; /* Spin lock for stopping AO command */
+ unsigned long state; /* State flags */
+ unsigned long iobase1; /* PCI230's I/O space 1 */
+ unsigned int ao_readback[2]; /* Used for AO readback */
+ unsigned int ai_scan_count; /* Number of analogue input scans
+ * remaining. */
+ unsigned int ai_scan_pos; /* Current position within analogue
+ * input scan */
+ unsigned int ao_scan_count; /* Number of analogue output scans
+ * remaining. */
+ int intr_cpuid; /* ID of CPU running interrupt routine. */
+ unsigned short hwver; /* Hardware version (for '+' models). */
+ unsigned short adccon; /* ADCCON register value. */
+ unsigned short daccon; /* DACCON register value. */
+ unsigned short adcfifothresh; /* ADC FIFO programmable interrupt
+ * level threshold (PCI230+/260+). */
+ unsigned short adcg; /* ADCG register value. */
+ unsigned char int_en; /* Interrupt enables bits. */
+ unsigned char ai_continuous; /* Flag set when cmd->stop_src ==
+ * TRIG_NONE - user chooses to stop
+ * continuous conversion by
+ * cancelation. */
+ unsigned char ao_continuous; /* Flag set when cmd->stop_src ==
+ * TRIG_NONE - user chooses to stop
+ * continuous conversion by
+ * cancelation. */
+ unsigned char ai_bipolar; /* Set if bipolar input range so we
+ * know to mangle it. */
+ unsigned char ao_bipolar; /* Set if bipolar output range so we
+ * know to mangle it. */
+ unsigned char ier; /* Copy of interrupt enables/status register. */
+ unsigned char intr_running; /* Flag set in interrupt routine. */
+ unsigned char res_owner[NUM_RESOURCES]; /* Shared resource owners. */
+};
+
+#define devpriv ((struct pci230_private *)dev->private)
+
+/* PCI230 clock source periods in ns */
+static const unsigned int pci230_timebase[8] = {
+ [CLK_10MHZ] = TIMEBASE_10MHZ,
+ [CLK_1MHZ] = TIMEBASE_1MHZ,
+ [CLK_100KHZ] = TIMEBASE_100KHZ,
+ [CLK_10KHZ] = TIMEBASE_10KHZ,
+ [CLK_1KHZ] = TIMEBASE_1KHZ,
+};
+
+/* PCI230 analogue input range table */
+static const struct comedi_lrange pci230_ai_range = { 7, {
+ BIP_RANGE(10),
+ BIP_RANGE(5),
+ BIP_RANGE(2.5),
+ BIP_RANGE(1.25),
+ UNI_RANGE(10),
+ UNI_RANGE(5),
+ UNI_RANGE(2.5)
+ }
+};
+
+/* PCI230 analogue gain bits for each input range. */
+static const unsigned char pci230_ai_gain[7] = { 0, 1, 2, 3, 1, 2, 3 };
+
+/* PCI230 adccon bipolar flag for each analogue input range. */
+static const unsigned char pci230_ai_bipolar[7] = { 1, 1, 1, 1, 0, 0, 0 };
+
+/* PCI230 analogue output range table */
+static const struct comedi_lrange pci230_ao_range = { 2, {
+ UNI_RANGE(10),
+ BIP_RANGE(10)
+ }
+};
+
+/* PCI230 daccon bipolar flag for each analogue output range. */
+static const unsigned char pci230_ao_bipolar[2] = { 0, 1 };
+
+/*
+ * 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 pci230_attach(struct comedi_device * dev, struct comedi_devconfig * it);
+static int pci230_detach(struct comedi_device * dev);
+static struct comedi_driver driver_amplc_pci230 = {
+ driver_name:"amplc_pci230",
+ module:THIS_MODULE,
+ attach:pci230_attach,
+ detach:pci230_detach,
+ board_name:&pci230_boards[0].name,
+ offset:sizeof(pci230_boards[0]),
+ num_names:sizeof(pci230_boards) / sizeof(pci230_boards[0]),
+};
+
+COMEDI_PCI_INITCLEANUP(driver_amplc_pci230, pci230_pci_table);
+
+static int pci230_ai_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data);
+static int pci230_ao_winsn(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data);
+static int pci230_ao_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data);
+static void pci230_ct_setup_ns_mode(struct comedi_device * dev, unsigned int ct,
+ unsigned int mode, uint64_t ns, unsigned int round);
+static void pci230_ns_to_single_timer(unsigned int *ns, unsigned int round);
+static void pci230_cancel_ct(struct comedi_device * dev, unsigned int ct);
+static irqreturn_t pci230_interrupt(int irq, void *d PT_REGS_ARG);
+static int pci230_ao_cmdtest(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_cmd * cmd);
+static int pci230_ao_cmd(struct comedi_device * dev, struct comedi_subdevice * s);
+static int pci230_ao_cancel(struct comedi_device * dev, struct comedi_subdevice * s);
+static void pci230_ao_stop(struct comedi_device * dev, struct comedi_subdevice * s);
+static void pci230_handle_ao_nofifo(struct comedi_device * dev, struct comedi_subdevice * s);
+static int pci230_handle_ao_fifo(struct comedi_device * dev, struct comedi_subdevice * s);
+static int pci230_ai_cmdtest(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_cmd * cmd);
+static int pci230_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s);
+static int pci230_ai_cancel(struct comedi_device * dev, struct comedi_subdevice * s);
+static void pci230_ai_stop(struct comedi_device * dev, struct comedi_subdevice * s);
+static void pci230_handle_ai(struct comedi_device * dev, struct comedi_subdevice * s);
+
+static short pci230_ai_read(struct comedi_device * dev)
+{
+ /* Read sample. */
+ short data = (short) inw(dev->iobase + PCI230_ADCDATA);
+
+ /* PCI230 is 12 bit - stored in upper bits of 16 bit register (lower
+ * four bits reserved for expansion). */
+ /* PCI230+ is 16 bit AI. */
+ data = data >> (16 - thisboard->ai_bits);
+
+ /* If a bipolar range was specified, mangle it (twos
+ * complement->straight binary). */
+ if (devpriv->ai_bipolar) {
+ data ^= 1 << (thisboard->ai_bits - 1);
+ }
+ return data;
+}
+
+static inline unsigned short pci230_ao_mangle_datum(struct comedi_device * dev,
+ short datum)
+{
+ /* If a bipolar range was specified, mangle it (straight binary->twos
+ * complement). */
+ if (devpriv->ao_bipolar) {
+ datum ^= 1 << (thisboard->ao_bits - 1);
+ }
+
+ /* PCI230 is 12 bit - stored in upper bits of 16 bit register (lower
+ * four bits reserved for expansion). */
+ /* PCI230+ is also 12 bit AO. */
+ datum <<= (16 - thisboard->ao_bits);
+ return (unsigned short)datum;
+}
+
+static inline void pci230_ao_write_nofifo(struct comedi_device * dev, short datum,
+ unsigned int chan)
+{
+ /* Store unmangled datum to be read back later. */
+ devpriv->ao_readback[chan] = datum;
+
+ /* Write mangled datum to appropriate DACOUT register. */
+ outw(pci230_ao_mangle_datum(dev, datum), dev->iobase + (((chan) == 0)
+ ? PCI230_DACOUT1 : PCI230_DACOUT2));
+}
+
+static inline void pci230_ao_write_fifo(struct comedi_device * dev, short datum,
+ unsigned int chan)
+{
+ /* Store unmangled datum to be read back later. */
+ devpriv->ao_readback[chan] = datum;
+
+ /* Write mangled datum to appropriate DACDATA register. */
+ outw(pci230_ao_mangle_datum(dev, datum),
+ dev->iobase + PCI230P2_DACDATA);
+}
+
+/*
+ * 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 pci230_attach(struct comedi_device * dev, struct comedi_devconfig * it)
+{
+ struct comedi_subdevice *s;
+ unsigned long iobase1, iobase2;
+ /* PCI230's I/O spaces 1 and 2 respectively. */
+ struct pci_dev *pci_dev;
+ int i = 0, irq_hdl, rc;
+
+ printk("comedi%d: amplc_pci230: attach %s %d,%d\n", dev->minor,
+ thisboard->name, it->options[0], it->options[1]);
+
+ /* Allocate the private structure area using alloc_private().
+ * Macro defined in comedidev.h - memsets struct fields to 0. */
+ if ((alloc_private(dev, sizeof(struct pci230_private))) < 0) {
+ return -ENOMEM;
+ }
+ spin_lock_init(&devpriv->isr_spinlock);
+ spin_lock_init(&devpriv->res_spinlock);
+ spin_lock_init(&devpriv->ai_stop_spinlock);
+ spin_lock_init(&devpriv->ao_stop_spinlock);
+ /* Find card */
+ for (pci_dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
+ pci_dev != NULL;
+ pci_dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) {
+ if (it->options[0] || it->options[1]) {
+ /* Match against bus/slot options. */
+ if (it->options[0] != pci_dev->bus->number ||
+ it->options[1] != PCI_SLOT(pci_dev->devfn))
+ continue;
+ }
+ if (pci_dev->vendor != PCI_VENDOR_ID_AMPLICON)
+ continue;
+ if (thisboard->id == PCI_DEVICE_ID_INVALID) {
+ /* The name was specified as "amplc_pci230" which is
+ * used to match any supported device. Replace the
+ * current dev->board_ptr with one that matches the
+ * PCI device ID. */
+ for (i = 0; i < n_pci230_boards; i++) {
+ if (pci_dev->device == pci230_boards[i].id) {
+ if (pci230_boards[i].min_hwver > 0) {
+ /* Check for a '+' model.
+ * First check length of
+ * registers. */
+ if (pci_resource_len(pci_dev, 3)
+ < 32) {
+ /* Not a '+' model. */
+ continue;
+ }
+ /* TODO: temporarily enable the
+ * PCI device and read the
+ * hardware version register.
+ * For now assume it's okay. */
+ }
+ /* Change board_ptr to matched board */
+ dev->board_ptr = &pci230_boards[i];
+ break;
+ }
+ }
+ if (i < n_pci230_boards)
+ break;
+ } else {
+ /* The name was specified as a specific device name.
+ * The current dev->board_ptr is correct. Check
+ * whether it matches the PCI device ID. */
+ if (thisboard->id == pci_dev->device) {
+ /* Check minimum hardware version. */
+ if (thisboard->min_hwver > 0) {
+ /* Looking for a '+' model. First
+ * check length of registers. */
+ if (pci_resource_len(pci_dev, 3) < 32) {
+ /* Not a '+' model. */
+ continue;
+ }
+ /* TODO: temporarily enable the PCI
+ * device and read the hardware version
+ * register. For now, assume it's
+ * okay. */
+ break;
+ } else {
+ break;
+ }
+ }
+ }
+ }
+ if (!pci_dev) {
+ printk("comedi%d: No %s card found\n", dev->minor,
+ thisboard->name);
+ return -EIO;
+ }
+ devpriv->pci_dev = pci_dev;
+
+ /*
+ * Initialize dev->board_name.
+ */
+ dev->board_name = thisboard->name;
+
+ /* Enable PCI device and reserve I/O spaces. */
+ if (comedi_pci_enable(pci_dev, "amplc_pci230") < 0) {
+ printk("comedi%d: failed to enable PCI device "
+ "and request regions\n", dev->minor);
+ return -EIO;
+ }
+
+ /* Read base addresses of the PCI230's two I/O regions from PCI
+ * configuration register. */
+ iobase1 = pci_resource_start(pci_dev, 2);
+ iobase2 = pci_resource_start(pci_dev, 3);
+
+ printk("comedi%d: %s I/O region 1 0x%04lx I/O region 2 0x%04lx\n",
+ dev->minor, dev->board_name, iobase1, iobase2);
+
+ devpriv->iobase1 = iobase1;
+ dev->iobase = iobase2;
+
+ /* Read bits of DACCON register - only the output range. */
+ devpriv->daccon = inw(dev->iobase + PCI230_DACCON) & PCI230_DAC_OR_MASK;
+
+ /* Read hardware version register and set extended function register
+ * if they exist. */
+ if (pci_resource_len(pci_dev, 3) >= 32) {
+ unsigned short extfunc = 0;
+
+ devpriv->hwver = inw(dev->iobase + PCI230P_HWVER);
+ if (devpriv->hwver < thisboard->min_hwver) {
+ printk("comedi%d: %s - bad hardware version "
+ "- got %u, need %u\n", dev->minor,
+ dev->board_name, devpriv->hwver,
+ thisboard->min_hwver);
+ return -EIO;
+ }
+ if (devpriv->hwver > 0) {
+ if (!thisboard->have_dio) {
+ /* No DIO ports. Route counters' external gates
+ * to the EXTTRIG signal (PCI260+ pin 17).
+ * (Otherwise, they would be routed to DIO
+ * inputs PC0, PC1 and PC2 which don't exist
+ * on PCI260[+].) */
+ extfunc |= PCI230P_EXTFUNC_GAT_EXTTRIG;
+ }
+ if ((thisboard->ao_chans > 0)
+ && (devpriv->hwver >= 2)) {
+ /* Enable DAC FIFO functionality. */
+ extfunc |= PCI230P2_EXTFUNC_DACFIFO;
+ }
+ }
+ outw(extfunc, dev->iobase + PCI230P_EXTFUNC);
+ if ((extfunc & PCI230P2_EXTFUNC_DACFIFO) != 0) {
+ /* Temporarily enable DAC FIFO, reset it and disable
+ * FIFO wraparound. */
+ outw(devpriv->daccon | PCI230P2_DAC_FIFO_EN
+ | PCI230P2_DAC_FIFO_RESET,
+ dev->iobase + PCI230_DACCON);
+ /* Clear DAC FIFO channel enable register. */
+ outw(0, dev->iobase + PCI230P2_DACEN);
+ /* Disable DAC FIFO. */
+ outw(devpriv->daccon, dev->iobase + PCI230_DACCON);
+ }
+ }
+
+ /* Disable board's interrupts. */
+ outb(0, devpriv->iobase1 + PCI230_INT_SCE);
+
+ /* Set ADC to a reasonable state. */
+ devpriv->adcg = 0;
+ devpriv->adccon = PCI230_ADC_TRIG_NONE | PCI230_ADC_IM_SE
+ | PCI230_ADC_IR_BIP;
+ outw(1 << 0, dev->iobase + PCI230_ADCEN);
+ outw(devpriv->adcg, dev->iobase + PCI230_ADCG);
+ outw(devpriv->adccon | PCI230_ADC_FIFO_RESET,
+ dev->iobase + PCI230_ADCCON);
+
+ /* Register the interrupt handler. */
+ irq_hdl = comedi_request_irq(devpriv->pci_dev->irq, pci230_interrupt,
+ IRQF_SHARED, "amplc_pci230", dev);
+ if (irq_hdl < 0) {
+ printk("comedi%d: unable to register irq, "
+ "commands will not be available %d\n", dev->minor,
+ devpriv->pci_dev->irq);
+ } else {
+ dev->irq = devpriv->pci_dev->irq;
+ printk("comedi%d: registered irq %u\n", dev->minor,
+ devpriv->pci_dev->irq);
+ }
+
+ /*
+ * Allocate the subdevice structures. alloc_subdevice() is a
+ * convenient macro defined in comedidev.h.
+ */
+ if (alloc_subdevices(dev, 3) < 0)
+ return -ENOMEM;
+
+ s = dev->subdevices + 0;
+ /* analog input subdevice */
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE | SDF_DIFF | SDF_GROUND;
+ s->n_chan = thisboard->ai_chans;
+ s->maxdata = (1 << thisboard->ai_bits) - 1;
+ s->range_table = &pci230_ai_range;
+ s->insn_read = &pci230_ai_rinsn;
+ s->len_chanlist = 256; /* but there are restrictions. */
+ /* Only register commands if the interrupt handler is installed. */
+ if (irq_hdl == 0) {
+ dev->read_subdev = s;
+ s->subdev_flags |= SDF_CMD_READ;
+ s->do_cmd = &pci230_ai_cmd;
+ s->do_cmdtest = &pci230_ai_cmdtest;
+ s->cancel = pci230_ai_cancel;
+ }
+
+ s = dev->subdevices + 1;
+ /* analog output subdevice */
+ if (thisboard->ao_chans > 0) {
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
+ s->n_chan = thisboard->ao_chans;;
+ s->maxdata = (1 << thisboard->ao_bits) - 1;
+ s->range_table = &pci230_ao_range;
+ s->insn_write = &pci230_ao_winsn;
+ s->insn_read = &pci230_ao_rinsn;
+ s->len_chanlist = thisboard->ao_chans;
+ /* Only register commands if the interrupt handler is
+ * installed. */
+ if (irq_hdl == 0) {
+ dev->write_subdev = s;
+ s->subdev_flags |= SDF_CMD_WRITE;
+ s->do_cmd = &pci230_ao_cmd;
+ s->do_cmdtest = &pci230_ao_cmdtest;
+ s->cancel = pci230_ao_cancel;
+ }
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ s = dev->subdevices + 2;
+ /* digital i/o subdevice */
+ if (thisboard->have_dio) {
+ rc = subdev_8255_init(dev, s, NULL,
+ (devpriv->iobase1 + PCI230_PPI_X_BASE));
+ if (rc < 0)
+ return rc;
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ printk("comedi%d: attached\n", dev->minor);
+
+ 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 pci230_detach(struct comedi_device * dev)
+{
+ printk("comedi%d: amplc_pci230: remove\n", dev->minor);
+
+ if (dev->subdevices && thisboard->have_dio)
+ /* Clean up dio subdevice. */
+ subdev_8255_cleanup(dev, dev->subdevices + 2);
+
+ if (dev->irq)
+ comedi_free_irq(dev->irq, dev);
+
+ if (devpriv) {
+ if (devpriv->pci_dev) {
+ if (dev->iobase) {
+ comedi_pci_disable(devpriv->pci_dev);
+ }
+ pci_dev_put(devpriv->pci_dev);
+ }
+ }
+
+ return 0;
+}
+
+static int get_resources(struct comedi_device * dev, unsigned int res_mask,
+ unsigned char owner)
+{
+ int ok;
+ unsigned int i;
+ unsigned int b;
+ unsigned int claimed;
+ unsigned long irqflags;
+
+ ok = 1;
+ claimed = 0;
+ comedi_spin_lock_irqsave(&devpriv->res_spinlock, irqflags);
+ for (b = 1, i = 0; (i < NUM_RESOURCES)
+ && (res_mask != 0); b <<= 1, i++) {
+ if ((res_mask & b) != 0) {
+ res_mask &= ~b;
+ if (devpriv->res_owner[i] == OWNER_NONE) {
+ devpriv->res_owner[i] = owner;
+ claimed |= b;
+ } else if (devpriv->res_owner[i] != owner) {
+ for (b = 1, i = 0; claimed != 0; b <<= 1, i++) {
+ if ((claimed & b) != 0) {
+ devpriv->res_owner[i]
+ = OWNER_NONE;
+ claimed &= ~b;
+ }
+ }
+ ok = 0;
+ break;
+ }
+ }
+ }
+ comedi_spin_unlock_irqrestore(&devpriv->res_spinlock, irqflags);
+ return ok;
+}
+
+static inline int get_one_resource(struct comedi_device * dev, unsigned int resource,
+ unsigned char owner)
+{
+ return get_resources(dev, (1U << resource), owner);
+}
+
+static void put_resources(struct comedi_device * dev, unsigned int res_mask,
+ unsigned char owner)
+{
+ unsigned int i;
+ unsigned int b;
+ unsigned long irqflags;
+
+ comedi_spin_lock_irqsave(&devpriv->res_spinlock, irqflags);
+ for (b = 1, i = 0; (i < NUM_RESOURCES)
+ && (res_mask != 0); b <<= 1, i++) {
+ if ((res_mask & b) != 0) {
+ res_mask &= ~b;
+ if (devpriv->res_owner[i] == owner) {
+ devpriv->res_owner[i] = OWNER_NONE;
+ }
+ }
+ }
+ comedi_spin_unlock_irqrestore(&devpriv->res_spinlock, irqflags);
+}
+
+static inline void put_one_resource(struct comedi_device * dev, unsigned int resource,
+ unsigned char owner)
+{
+ put_resources(dev, (1U << resource), owner);
+}
+
+static inline void put_all_resources(struct comedi_device * dev, unsigned char owner)
+{
+ put_resources(dev, (1U << NUM_RESOURCES) - 1, owner);
+}
+
+/*
+ * COMEDI_SUBD_AI instruction;
+ */
+static int pci230_ai_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ unsigned int n, i;
+ unsigned int chan, range, aref;
+ unsigned int gainshift;
+ unsigned int status;
+ unsigned short adccon, adcen;
+
+ /* Unpack channel and range. */
+ chan = CR_CHAN(insn->chanspec);
+ range = CR_RANGE(insn->chanspec);
+ aref = CR_AREF(insn->chanspec);
+ if (aref == AREF_DIFF) {
+ /* Differential. */
+ if (chan >= s->n_chan / 2) {
+ DPRINTK("comedi%d: amplc_pci230: ai_rinsn: "
+ "differential channel number out of range "
+ "0 to %u\n", dev->minor, (s->n_chan / 2) - 1);
+ return -EINVAL;
+ }
+ }
+
+ /* Use Z2-CT2 as a conversion trigger instead of the built-in
+ * software trigger, as otherwise triggering of differential channels
+ * doesn't work properly for some versions of PCI230/260. Also set
+ * FIFO mode because the ADC busy bit only works for software triggers.
+ */
+ adccon = PCI230_ADC_TRIG_Z2CT2 | PCI230_ADC_FIFO_EN;
+ /* Set Z2-CT2 output low to avoid any false triggers. */
+ i8254_set_mode(devpriv->iobase1 + PCI230_Z2_CT_BASE, 0, 2, I8254_MODE0);
+ devpriv->ai_bipolar = pci230_ai_bipolar[range];
+ if (aref == AREF_DIFF) {
+ /* Differential. */
+ gainshift = chan * 2;
+ if (devpriv->hwver == 0) {
+ /* Original PCI230/260 expects both inputs of the
+ * differential channel to be enabled. */
+ adcen = 3 << gainshift;
+ } else {
+ /* PCI230+/260+ expects only one input of the
+ * differential channel to be enabled. */
+ adcen = 1 << gainshift;
+ }
+ adccon |= PCI230_ADC_IM_DIF;
+ } else {
+ /* Single ended. */
+ adcen = 1 << chan;
+ gainshift = chan & ~1;
+ adccon |= PCI230_ADC_IM_SE;
+ }
+ devpriv->adcg = (devpriv->adcg & ~(3 << gainshift))
+ | (pci230_ai_gain[range] << gainshift);
+ if (devpriv->ai_bipolar) {
+ adccon |= PCI230_ADC_IR_BIP;
+ } else {
+ adccon |= PCI230_ADC_IR_UNI;
+ }
+
+ /* Enable only this channel in the scan list - otherwise by default
+ * we'll get one sample from each channel. */
+ outw(adcen, dev->iobase + PCI230_ADCEN);
+
+ /* Set gain for channel. */
+ outw(devpriv->adcg, dev->iobase + PCI230_ADCG);
+
+ /* Specify uni/bip, se/diff, conversion source, and reset FIFO. */
+ devpriv->adccon = adccon;
+ outw(adccon | PCI230_ADC_FIFO_RESET, dev->iobase + PCI230_ADCCON);
+
+ /* Convert n samples */
+ for (n = 0; n < insn->n; n++) {
+ /* Trigger conversion by toggling Z2-CT2 output (finish with
+ * output high). */
+ i8254_set_mode(devpriv->iobase1 + PCI230_Z2_CT_BASE, 0, 2,
+ I8254_MODE0);
+ i8254_set_mode(devpriv->iobase1 + PCI230_Z2_CT_BASE, 0, 2,
+ I8254_MODE1);
+
+#define TIMEOUT 100
+ /* wait for conversion to end */
+ for (i = 0; i < TIMEOUT; i++) {
+ status = inw(dev->iobase + PCI230_ADCCON);
+ if (!(status & PCI230_ADC_FIFO_EMPTY))
+ break;
+ comedi_udelay(1);
+ }
+ if (i == TIMEOUT) {
+ /* rt_printk() should be used instead of printk()
+ * whenever the code can be called from real-time. */
+ rt_printk("timeout\n");
+ return -ETIMEDOUT;
+ }
+
+ /* read data */
+ data[n] = pci230_ai_read(dev);
+ }
+
+ /* return the number of samples read/written */
+ return n;
+}
+
+/*
+ * COMEDI_SUBD_AO instructions;
+ */
+static int pci230_ao_winsn(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);
+
+ /* Set range - see analogue output range table; 0 => unipolar 10V,
+ * 1 => bipolar +/-10V range scale */
+ devpriv->ao_bipolar = pci230_ao_bipolar[range];
+ outw(range, dev->iobase + PCI230_DACCON);
+
+ /* 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++) {
+ /* Write value to DAC and store it. */
+ pci230_ao_write_nofifo(dev, data[i], chan);
+ }
+
+ /* return the number of samples read/written */
+ return i;
+}
+
+/* AO subdevices should have a read insn as well as a write insn.
+ * Usually this means copying a value stored in devpriv. */
+static int pci230_ao_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ int i;
+ int chan = CR_CHAN(insn->chanspec);
+
+ for (i = 0; i < insn->n; i++)
+ data[i] = devpriv->ao_readback[chan];
+
+ return i;
+}
+
+static int pci230_ao_cmdtest(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_cmd * cmd)
+{
+ int err = 0;
+ unsigned int tmp;
+
+ /* cmdtest tests a particular command to see if it is valid.
+ * Using the cmdtest ioctl, a user can create a valid cmd
+ * and then have it executes by the cmd ioctl.
+ *
+ * cmdtest returns 1,2,3,4 or 0, depending on which tests
+ * the command passes. */
+
+ /* Step 1: make sure trigger sources are trivially valid.
+ * "invalid source" returned by comedilib to user mode process
+ * if this fails. */
+
+ tmp = cmd->start_src;
+ cmd->start_src &= TRIG_INT;
+ if (!cmd->start_src || tmp != cmd->start_src)
+ err++;
+
+ tmp = cmd->scan_begin_src;
+ if ((thisboard->min_hwver > 0) && (devpriv->hwver >= 2)) {
+ /*
+ * For PCI230+ hardware version 2 onwards, allow external
+ * trigger from EXTTRIG/EXTCONVCLK input (PCI230+ pin 25).
+ *
+ * FIXME: The permitted scan_begin_src values shouldn't depend
+ * on devpriv->hwver (the detected card's actual hardware
+ * version). They should only depend on thisboard->min_hwver
+ * (the static capabilities of the configured card). To fix
+ * it, a new card model, e.g. "pci230+2" would have to be
+ * defined with min_hwver set to 2. It doesn't seem worth it
+ * for this alone. At the moment, please consider
+ * scan_begin_src==TRIG_EXT support to be a bonus rather than a
+ * guarantee!
+ */
+ cmd->scan_begin_src &= TRIG_TIMER | TRIG_INT | TRIG_EXT;
+ } else {
+ cmd->scan_begin_src &= TRIG_TIMER | TRIG_INT;
+ }
+ 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_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
+ * "source conflict" returned by comedilib to user mode process
+ * if this fails. */
+
+ /* 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++;
+
+ if (err)
+ return 2;
+
+ /* Step 3: make sure arguments are trivially compatible.
+ * "invalid argument" returned by comedilib to user mode process
+ * if this fails. */
+
+ if (cmd->start_arg != 0) {
+ cmd->start_arg = 0;
+ err++;
+ }
+#define MAX_SPEED_AO 8000 /* 8000 ns => 125 kHz */
+#define MIN_SPEED_AO 4294967295u /* 4294967295ns = 4.29s */
+ /*- Comedi limit due to unsigned int cmd. Driver limit
+ * = 2^16 (16bit * counter) * 1000000ns (1kHz onboard
+ * clock) = 65.536s */
+
+ switch (cmd->scan_begin_src) {
+ case TRIG_TIMER:
+ if (cmd->scan_begin_arg < MAX_SPEED_AO) {
+ cmd->scan_begin_arg = MAX_SPEED_AO;
+ err++;
+ }
+ if (cmd->scan_begin_arg > MIN_SPEED_AO) {
+ cmd->scan_begin_arg = MIN_SPEED_AO;
+ err++;
+ }
+ break;
+ case TRIG_EXT:
+ /* External trigger - for PCI230+ hardware version 2 onwards. */
+ /* Trigger number must be 0. */
+ if ((cmd->scan_begin_arg & ~CR_FLAGS_MASK) != 0) {
+ cmd->scan_begin_arg = COMBINE(cmd->scan_begin_arg, 0,
+ ~CR_FLAGS_MASK);
+ err++;
+ }
+ /* The only flags allowed are CR_EDGE and CR_INVERT. The
+ * CR_EDGE flag is ignored. */
+ 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;
+ default:
+ if (cmd->scan_begin_arg != 0) {
+ cmd->scan_begin_arg = 0;
+ err++;
+ }
+ break;
+ }
+
+ if (cmd->scan_end_arg != cmd->chanlist_len) {
+ cmd->scan_end_arg = cmd->chanlist_len;
+ err++;
+ }
+ if (cmd->stop_src == TRIG_NONE) {
+ /* TRIG_NONE */
+ if (cmd->stop_arg != 0) {
+ cmd->stop_arg = 0;
+ err++;
+ }
+ }
+
+ if (err)
+ return 3;
+
+ /* Step 4: fix up any arguments.
+ * "argument conflict" returned by comedilib to user mode process
+ * if this fails. */
+
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ tmp = cmd->scan_begin_arg;
+ pci230_ns_to_single_timer(&cmd->scan_begin_arg,
+ cmd->flags & TRIG_ROUND_MASK);
+ if (tmp != cmd->scan_begin_arg)
+ err++;
+ }
+
+ if (err)
+ return 4;
+
+ /* Step 5: check channel list if it exists. */
+
+ if (cmd->chanlist && cmd->chanlist_len > 0) {
+ enum {
+ seq_err = (1 << 0),
+ range_err = (1 << 1)
+ };
+ unsigned int errors;
+ unsigned int n;
+ unsigned int chan, prev_chan;
+ unsigned int range, first_range;
+
+ prev_chan = CR_CHAN(cmd->chanlist[0]);
+ first_range = CR_RANGE(cmd->chanlist[0]);
+ errors = 0;
+ for (n = 1; n < cmd->chanlist_len; n++) {
+ chan = CR_CHAN(cmd->chanlist[n]);
+ range = CR_RANGE(cmd->chanlist[n]);
+ /* Channel numbers must strictly increase. */
+ if (chan < prev_chan) {
+ errors |= seq_err;
+ }
+ /* Ranges must be the same. */
+ if (range != first_range) {
+ errors |= range_err;
+ }
+ prev_chan = chan;
+ }
+ if (errors != 0) {
+ err++;
+ if ((errors & seq_err) != 0) {
+ DPRINTK("comedi%d: amplc_pci230: ao_cmdtest: "
+ "channel numbers must increase\n",
+ dev->minor);
+ }
+ if ((errors & range_err) != 0) {
+ DPRINTK("comedi%d: amplc_pci230: ao_cmdtest: "
+ "channels must have the same range\n",
+ dev->minor);
+ }
+ }
+ }
+
+ if (err)
+ return 5;
+
+ return 0;
+}
+
+static int pci230_ao_inttrig_scan_begin(struct comedi_device * dev,
+ struct comedi_subdevice * s, unsigned int trig_num)
+{
+ unsigned long irqflags;
+
+ if (trig_num != 0)
+ return -EINVAL;
+
+ comedi_spin_lock_irqsave(&devpriv->ao_stop_spinlock, irqflags);
+ if (test_bit(AO_CMD_STARTED, &devpriv->state)) {
+ /* Perform scan. */
+ if (devpriv->hwver < 2) {
+ /* Not using DAC FIFO. */
+ comedi_spin_unlock_irqrestore(&devpriv->
+ ao_stop_spinlock, irqflags);
+ pci230_handle_ao_nofifo(dev, s);
+ comedi_event(dev, s);
+ } else {
+ /* Using DAC FIFO. */
+ /* Read DACSWTRIG register to trigger conversion. */
+ inw(dev->iobase + PCI230P2_DACSWTRIG);
+ comedi_spin_unlock_irqrestore(&devpriv->
+ ao_stop_spinlock, irqflags);
+ }
+ /* Delay. Should driver be responsible for this? */
+ /* XXX TODO: See if DAC busy bit can be used. */
+ comedi_udelay(8);
+ }
+
+ return 1;
+}
+
+static void pci230_ao_start(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ struct comedi_async *async = s->async;
+ struct comedi_cmd *cmd = &async->cmd;
+ unsigned long irqflags;
+
+ set_bit(AO_CMD_STARTED, &devpriv->state);
+ if (!devpriv->ao_continuous && (devpriv->ao_scan_count == 0)) {
+ /* An empty acquisition! */
+ async->events |= COMEDI_CB_EOA;
+ pci230_ao_stop(dev, s);
+ comedi_event(dev, s);
+ } else {
+ if (devpriv->hwver >= 2) {
+ /* Using DAC FIFO. */
+ unsigned short scantrig;
+ int run;
+
+ /* Preload FIFO data. */
+ run = pci230_handle_ao_fifo(dev, s);
+ comedi_event(dev, s);
+ if (!run) {
+ /* Stopped. */
+ return;
+ }
+ /* Set scan trigger source. */
+ switch (cmd->scan_begin_src) {
+ case TRIG_TIMER:
+ scantrig = PCI230P2_DAC_TRIG_Z2CT1;
+ break;
+ case TRIG_EXT:
+ /* Trigger on EXTTRIG/EXTCONVCLK pin. */
+ if ((cmd->scan_begin_arg & CR_INVERT) == 0) {
+ /* +ve edge */
+ scantrig = PCI230P2_DAC_TRIG_EXTP;
+ } else {
+ /* -ve edge */
+ scantrig = PCI230P2_DAC_TRIG_EXTN;
+ }
+ break;
+ case TRIG_INT:
+ scantrig = PCI230P2_DAC_TRIG_SW;
+ break;
+ default:
+ /* Shouldn't get here. */
+ scantrig = PCI230P2_DAC_TRIG_NONE;
+ break;
+ }
+ devpriv->daccon = (devpriv->daccon
+ & ~PCI230P2_DAC_TRIG_MASK) | scantrig;
+ outw(devpriv->daccon, dev->iobase + PCI230_DACCON);
+
+ }
+ switch (cmd->scan_begin_src) {
+ case TRIG_TIMER:
+ if (devpriv->hwver < 2) {
+ /* Not using DAC FIFO. */
+ /* Enable CT1 timer interrupt. */
+ comedi_spin_lock_irqsave(&devpriv->isr_spinlock,
+ irqflags);
+ devpriv->int_en |= PCI230_INT_ZCLK_CT1;
+ devpriv->ier |= PCI230_INT_ZCLK_CT1;
+ outb(devpriv->ier,
+ devpriv->iobase1 + PCI230_INT_SCE);
+ comedi_spin_unlock_irqrestore(&devpriv->
+ isr_spinlock, irqflags);
+ }
+ /* Set CT1 gate high to start counting. */
+ outb(GAT_CONFIG(1, GAT_VCC),
+ devpriv->iobase1 + PCI230_ZGAT_SCE);
+ break;
+ case TRIG_INT:
+ async->inttrig = pci230_ao_inttrig_scan_begin;
+ break;
+ }
+ if (devpriv->hwver >= 2) {
+ /* Using DAC FIFO. Enable DAC FIFO interrupt. */
+ comedi_spin_lock_irqsave(&devpriv->isr_spinlock,
+ irqflags);
+ devpriv->int_en |= PCI230P2_INT_DAC;
+ devpriv->ier |= PCI230P2_INT_DAC;
+ outb(devpriv->ier, devpriv->iobase1 + PCI230_INT_SCE);
+ comedi_spin_unlock_irqrestore(&devpriv->isr_spinlock,
+ irqflags);
+ }
+ }
+}
+
+static int pci230_ao_inttrig_start(struct comedi_device * dev, struct comedi_subdevice * s,
+ unsigned int trig_num)
+{
+ if (trig_num != 0)
+ return -EINVAL;
+
+ s->async->inttrig = NULLFUNC;
+ pci230_ao_start(dev, s);
+
+ return 1;
+}
+
+static int pci230_ao_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ unsigned short daccon;
+ unsigned int range;
+
+ /* Get the command. */
+ struct comedi_cmd *cmd = &s->async->cmd;
+
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ /* Claim Z2-CT1. */
+ if (!get_one_resource(dev, RES_Z2CT1, OWNER_AOCMD)) {
+ return -EBUSY;
+ }
+ }
+
+ /* Get number of scans required. */
+ if (cmd->stop_src == TRIG_COUNT) {
+ devpriv->ao_scan_count = cmd->stop_arg;
+ devpriv->ao_continuous = 0;
+ } else {
+ /* TRIG_NONE, user calls cancel. */
+ devpriv->ao_scan_count = 0;
+ devpriv->ao_continuous = 1;
+ }
+
+ /* Set range - see analogue output range table; 0 => unipolar 10V,
+ * 1 => bipolar +/-10V range scale */
+ range = CR_RANGE(cmd->chanlist[0]);
+ devpriv->ao_bipolar = pci230_ao_bipolar[range];
+ daccon = devpriv->ao_bipolar ? PCI230_DAC_OR_BIP : PCI230_DAC_OR_UNI;
+ /* Use DAC FIFO for hardware version 2 onwards. */
+ if (devpriv->hwver >= 2) {
+ unsigned short dacen;
+ unsigned int i;
+
+ dacen = 0;
+ for (i = 0; i < cmd->chanlist_len; i++) {
+ dacen |= 1 << CR_CHAN(cmd->chanlist[i]);
+ }
+ /* Set channel scan list. */
+ outw(dacen, dev->iobase + PCI230P2_DACEN);
+ /*
+ * Enable DAC FIFO.
+ * Set DAC scan source to 'none'.
+ * Set DAC FIFO interrupt trigger level to 'not half full'.
+ * Reset DAC FIFO and clear underrun.
+ *
+ * N.B. DAC FIFO interrupts are currently disabled.
+ */
+ daccon |= PCI230P2_DAC_FIFO_EN | PCI230P2_DAC_FIFO_RESET
+ | PCI230P2_DAC_FIFO_UNDERRUN_CLEAR
+ | PCI230P2_DAC_TRIG_NONE | PCI230P2_DAC_INT_FIFO_NHALF;
+ }
+
+ /* Set DACCON. */
+ outw(daccon, dev->iobase + PCI230_DACCON);
+ /* Preserve most of DACCON apart from write-only, transient bits. */
+ devpriv->daccon = daccon
+ & ~(PCI230P2_DAC_FIFO_RESET | PCI230P2_DAC_FIFO_UNDERRUN_CLEAR);
+
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ /* Set the counter timer 1 to the specified scan frequency. */
+ /* cmd->scan_begin_arg is sampling period in ns */
+ /* gate it off for now. */
+ outb(GAT_CONFIG(1, GAT_GND),
+ devpriv->iobase1 + PCI230_ZGAT_SCE);
+ pci230_ct_setup_ns_mode(dev, 1, I8254_MODE3,
+ cmd->scan_begin_arg, cmd->flags & TRIG_ROUND_MASK);
+ }
+
+ /* N.B. cmd->start_src == TRIG_INT */
+ s->async->inttrig = pci230_ao_inttrig_start;
+
+ return 0;
+}
+
+static int pci230_ai_check_scan_period(struct comedi_cmd * cmd)
+{
+ unsigned int min_scan_period, chanlist_len;
+ int err = 0;
+
+ chanlist_len = cmd->chanlist_len;
+ if (cmd->chanlist_len == 0) {
+ chanlist_len = 1;
+ }
+ min_scan_period = chanlist_len * cmd->convert_arg;
+ if ((min_scan_period < chanlist_len)
+ || (min_scan_period < cmd->convert_arg)) {
+ /* Arithmetic overflow. */
+ min_scan_period = UINT_MAX;
+ err++;
+ }
+ if (cmd->scan_begin_arg < min_scan_period) {
+ cmd->scan_begin_arg = min_scan_period;
+ err++;
+ }
+
+ return !err;
+}
+
+static int pci230_ai_cmdtest(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_cmd * cmd)
+{
+ int err = 0;
+ unsigned int tmp;
+
+ /* cmdtest tests a particular command to see if it is valid.
+ * Using the cmdtest ioctl, a user can create a valid cmd
+ * and then have it executes by the cmd ioctl.
+ *
+ * cmdtest returns 1,2,3,4,5 or 0, depending on which tests
+ * the command passes. */
+
+ /* Step 1: make sure trigger sources are trivially valid.
+ * "invalid source" returned by comedilib to user mode process
+ * if this fails. */
+
+ tmp = cmd->start_src;
+ cmd->start_src &= TRIG_NOW | TRIG_INT;
+ if (!cmd->start_src || tmp != cmd->start_src)
+ err++;
+
+ tmp = cmd->scan_begin_src;
+ /* Unfortunately, we cannot trigger a scan off an external source
+ * on the PCI260 board, since it uses the PPIC0 (DIO) input, which
+ * isn't present on the PCI260. For PCI260+ we can use the
+ * EXTTRIG/EXTCONVCLK input on pin 17 instead. */
+ if ((thisboard->have_dio) || (thisboard->min_hwver > 0)) {
+ cmd->scan_begin_src &= TRIG_FOLLOW | TRIG_TIMER | TRIG_INT
+ | TRIG_EXT;
+ } else {
+ cmd->scan_begin_src &= TRIG_FOLLOW | TRIG_TIMER | TRIG_INT;
+ }
+ if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
+ err++;
+
+ tmp = cmd->convert_src;
+ cmd->convert_src &= TRIG_TIMER | TRIG_INT | TRIG_EXT;
+ 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_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
+ * "source conflict" returned by comedilib to user mode process
+ * if this fails. */
+
+ /* 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++;
+
+ /* If scan_begin_src is not TRIG_FOLLOW, then a monostable will be
+ * set up to generate a fixed number of timed conversion pulses. */
+ if ((cmd->scan_begin_src != TRIG_FOLLOW)
+ && (cmd->convert_src != TRIG_TIMER))
+ err++;
+
+ if (err)
+ return 2;
+
+ /* Step 3: make sure arguments are trivially compatible.
+ * "invalid argument" returned by comedilib to user mode process
+ * if this fails. */
+
+ if (cmd->start_arg != 0) {
+ cmd->start_arg = 0;
+ err++;
+ }
+#define MAX_SPEED_AI_SE 3200 /* PCI230 SE: 3200 ns => 312.5 kHz */
+#define MAX_SPEED_AI_DIFF 8000 /* PCI230 DIFF: 8000 ns => 125 kHz */
+#define MAX_SPEED_AI_PLUS 4000 /* PCI230+: 4000 ns => 250 kHz */
+#define MIN_SPEED_AI 4294967295u /* 4294967295ns = 4.29s */
+ /*- Comedi limit due to unsigned int cmd. Driver limit
+ * = 2^16 (16bit * counter) * 1000000ns (1kHz onboard
+ * clock) = 65.536s */
+
+ if (cmd->convert_src == TRIG_TIMER) {
+ unsigned int max_speed_ai;
+
+ if (devpriv->hwver == 0) {
+ /* PCI230 or PCI260. Max speed depends whether
+ * single-ended or pseudo-differential. */
+ if (cmd->chanlist && (cmd->chanlist_len > 0)) {
+ /* Peek analogue reference of first channel. */
+ if (CR_AREF(cmd->chanlist[0]) == AREF_DIFF) {
+ max_speed_ai = MAX_SPEED_AI_DIFF;
+ } else {
+ max_speed_ai = MAX_SPEED_AI_SE;
+ }
+ } else {
+ /* No channel list. Assume single-ended. */
+ max_speed_ai = MAX_SPEED_AI_SE;
+ }
+ } else {
+ /* PCI230+ or PCI260+. */
+ max_speed_ai = MAX_SPEED_AI_PLUS;
+ }
+
+ if (cmd->convert_arg < max_speed_ai) {
+ cmd->convert_arg = max_speed_ai;
+ err++;
+ }
+ if (cmd->convert_arg > MIN_SPEED_AI) {
+ cmd->convert_arg = MIN_SPEED_AI;
+ err++;
+ }
+ } else if (cmd->convert_src == TRIG_EXT) {
+ /*
+ * external trigger
+ *
+ * convert_arg == (CR_EDGE | 0)
+ * => trigger on +ve edge.
+ * convert_arg == (CR_EDGE | CR_INVERT | 0)
+ * => trigger on -ve edge.
+ */
+ if ((cmd->convert_arg & CR_FLAGS_MASK) != 0) {
+ /* Trigger number must be 0. */
+ if ((cmd->convert_arg & ~CR_FLAGS_MASK) != 0) {
+ cmd->convert_arg = COMBINE(cmd->convert_arg, 0,
+ ~CR_FLAGS_MASK);
+ err++;
+ }
+ /* The only flags allowed are CR_INVERT and CR_EDGE.
+ * CR_EDGE is required. */
+ if ((cmd->convert_arg & (CR_FLAGS_MASK & ~CR_INVERT))
+ != CR_EDGE) {
+ /* Set CR_EDGE, preserve CR_INVERT. */
+ cmd->convert_arg =
+ COMBINE(cmd->start_arg, (CR_EDGE | 0),
+ CR_FLAGS_MASK & ~CR_INVERT);
+ err++;
+ }
+ } else {
+ /* Backwards compatibility with previous versions. */
+ /* convert_arg == 0 => trigger on -ve edge. */
+ /* convert_arg == 1 => trigger on +ve edge. */
+ if (cmd->convert_arg > 1) {
+ /* Default to trigger on +ve edge. */
+ cmd->convert_arg = 1;
+ err++;
+ }
+ }
+ } else {
+ if (cmd->convert_arg != 0) {
+ cmd->convert_arg = 0;
+ err++;
+ }
+ }
+
+ if (cmd->scan_end_arg != cmd->chanlist_len) {
+ cmd->scan_end_arg = cmd->chanlist_len;
+ err++;
+ }
+
+ if (cmd->stop_src == TRIG_NONE) {
+ if (cmd->stop_arg != 0) {
+ cmd->stop_arg = 0;
+ err++;
+ }
+ }
+
+ if (cmd->scan_begin_src == TRIG_EXT) {
+ /* external "trigger" to begin each scan
+ * scan_begin_arg==0 => use PPC0 input -> gate of CT0 -> gate
+ * of CT2 (sample convert trigger is CT2) */
+ if ((cmd->scan_begin_arg & ~CR_FLAGS_MASK) != 0) {
+ cmd->scan_begin_arg = COMBINE(cmd->scan_begin_arg, 0,
+ ~CR_FLAGS_MASK);
+ err++;
+ }
+ /* The only flag allowed is CR_EDGE, which is ignored. */
+ if ((cmd->scan_begin_arg & CR_FLAGS_MASK & ~CR_EDGE) != 0) {
+ cmd->scan_begin_arg = COMBINE(cmd->scan_begin_arg, 0,
+ CR_FLAGS_MASK & ~CR_EDGE);
+ err++;
+ }
+ } else if (cmd->scan_begin_src == TRIG_TIMER) {
+ /* N.B. cmd->convert_arg is also TRIG_TIMER */
+ if (!pci230_ai_check_scan_period(cmd)) {
+ err++;
+ }
+ } else {
+ if (cmd->scan_begin_arg != 0) {
+ cmd->scan_begin_arg = 0;
+ err++;
+ }
+ }
+
+ if (err)
+ return 3;
+
+ /* Step 4: fix up any arguments.
+ * "argument conflict" returned by comedilib to user mode process
+ * if this fails. */
+
+ if (cmd->convert_src == TRIG_TIMER) {
+ tmp = cmd->convert_arg;
+ pci230_ns_to_single_timer(&cmd->convert_arg,
+ cmd->flags & TRIG_ROUND_MASK);
+ if (tmp != cmd->convert_arg)
+ err++;
+ }
+
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ /* N.B. cmd->convert_arg is also TRIG_TIMER */
+ tmp = cmd->scan_begin_arg;
+ pci230_ns_to_single_timer(&cmd->scan_begin_arg,
+ cmd->flags & TRIG_ROUND_MASK);
+ if (!pci230_ai_check_scan_period(cmd)) {
+ /* Was below minimum required. Round up. */
+ pci230_ns_to_single_timer(&cmd->scan_begin_arg,
+ TRIG_ROUND_UP);
+ pci230_ai_check_scan_period(cmd);
+ }
+ if (tmp != cmd->scan_begin_arg)
+ err++;
+ }
+
+ if (err)
+ return 4;
+
+ /* Step 5: check channel list if it exists. */
+
+ if (cmd->chanlist && cmd->chanlist_len > 0) {
+ enum {
+ seq_err = 1 << 0,
+ rangepair_err = 1 << 1,
+ polarity_err = 1 << 2,
+ aref_err = 1 << 3,
+ diffchan_err = 1 << 4,
+ buggy_chan0_err = 1 << 5
+ };
+ unsigned int errors;
+ unsigned int chan, prev_chan;
+ unsigned int range, prev_range;
+ unsigned int polarity, prev_polarity;
+ unsigned int aref, prev_aref;
+ unsigned int subseq_len;
+ unsigned int n;
+
+ subseq_len = 0;
+ errors = 0;
+ prev_chan = prev_aref = prev_range = prev_polarity = 0;
+ for (n = 0; n < cmd->chanlist_len; n++) {
+ chan = CR_CHAN(cmd->chanlist[n]);
+ range = CR_RANGE(cmd->chanlist[n]);
+ aref = CR_AREF(cmd->chanlist[n]);
+ polarity = pci230_ai_bipolar[range];
+ /* Only the first half of the channels are available if
+ * differential. (These are remapped in software. In
+ * hardware, only the even channels are available.) */
+ if ((aref == AREF_DIFF)
+ && (chan >= (s->n_chan / 2))) {
+ errors |= diffchan_err;
+ }
+ if (n > 0) {
+ /* Channel numbers must strictly increase or
+ * subsequence must repeat exactly. */
+ if ((chan <= prev_chan)
+ && (subseq_len == 0)) {
+ subseq_len = n;
+ }
+ if ((subseq_len > 0)
+ && (cmd->chanlist[n] !=
+ cmd->chanlist[n %
+ subseq_len])) {
+ errors |= seq_err;
+ }
+ /* Channels must have same AREF. */
+ if (aref != prev_aref) {
+ errors |= aref_err;
+ }
+ /* Channel ranges must have same polarity. */
+ if (polarity != prev_polarity) {
+ errors |= polarity_err;
+ }
+ /* Single-ended channel pairs must have same
+ * range. */
+ if ((aref != AREF_DIFF)
+ && (((chan ^ prev_chan) & ~1) == 0)
+ && (range != prev_range)) {
+ errors |= rangepair_err;
+ }
+ }
+ prev_chan = chan;
+ prev_range = range;
+ prev_aref = aref;
+ prev_polarity = polarity;
+ }
+ if (subseq_len == 0) {
+ /* Subsequence is whole sequence. */
+ subseq_len = n;
+ }
+ /* If channel list is a repeating subsequence, need a whole
+ * number of repeats. */
+ if ((n % subseq_len) != 0) {
+ errors |= seq_err;
+ }
+ if ((devpriv->hwver > 0) && (devpriv->hwver < 4)) {
+ /*
+ * Buggy PCI230+ or PCI260+ requires channel 0 to be
+ * (first) in the sequence if the sequence contains
+ * more than one channel. Hardware versions 1 and 2
+ * have the bug. There is no hardware version 3.
+ *
+ * Actually, there are two firmwares that report
+ * themselves as hardware version 1 (the boards
+ * have different ADC chips with slightly different
+ * timing requirements, which was supposed to be
+ * invisible to software). The first one doesn't
+ * seem to have the bug, but the second one
+ * does, and we can't tell them apart!
+ */
+ if ((subseq_len > 1)
+ && (CR_CHAN(cmd->chanlist[0]) != 0)) {
+ errors |= buggy_chan0_err;
+ }
+ }
+ if (errors != 0) {
+ err++;
+ if ((errors & seq_err) != 0) {
+ DPRINTK("comedi%d: amplc_pci230: ai_cmdtest: "
+ "channel numbers must increase or "
+ "sequence must repeat exactly\n",
+ dev->minor);
+ }
+ if ((errors & rangepair_err) != 0) {
+ DPRINTK("comedi%d: amplc_pci230: ai_cmdtest: "
+ "single-ended channel pairs must "
+ "have the same range\n", dev->minor);
+ }
+ if ((errors & polarity_err) != 0) {
+ DPRINTK("comedi%d: amplc_pci230: ai_cmdtest: "
+ "channel sequence ranges must be all "
+ "bipolar or all unipolar\n",
+ dev->minor);
+ }
+ if ((errors & aref_err) != 0) {
+ DPRINTK("comedi%d: amplc_pci230: ai_cmdtest: "
+ "channel sequence analogue references "
+ "must be all the same (single-ended "
+ "or differential)\n", dev->minor);
+ }
+ if ((errors & diffchan_err) != 0) {
+ DPRINTK("comedi%d: amplc_pci230: ai_cmdtest: "
+ "differential channel number out of "
+ "range 0 to %u\n", dev->minor,
+ (s->n_chan / 2) - 1);
+ }
+ if ((errors & buggy_chan0_err) != 0) {
+ /* Use printk instead of DPRINTK here. */
+ printk("comedi: comedi%d: amplc_pci230: "
+ "ai_cmdtest: Buggy PCI230+/260+ "
+ "h/w version %u requires first channel "
+ "of multi-channel sequence to be 0 "
+ "(corrected in h/w version 4)\n",
+ dev->minor, devpriv->hwver);
+ }
+ }
+ }
+
+ if (err)
+ return 5;
+
+ return 0;
+}
+
+static void pci230_ai_update_fifo_trigger_level(struct comedi_device * dev,
+ struct comedi_subdevice * s)
+{
+ struct comedi_cmd *cmd = &s->async->cmd;
+ unsigned int scanlen = cmd->scan_end_arg;
+ unsigned int wake;
+ unsigned short triglev;
+ unsigned short adccon;
+
+ if ((cmd->flags & TRIG_WAKE_EOS) != 0) {
+ /* Wake at end of scan. */
+ wake = scanlen - devpriv->ai_scan_pos;
+ } else {
+ if (devpriv->ai_continuous
+ || (devpriv->ai_scan_count
+ >= PCI230_ADC_FIFOLEVEL_HALFFULL)
+ || (scanlen >= PCI230_ADC_FIFOLEVEL_HALFFULL)) {
+ wake = PCI230_ADC_FIFOLEVEL_HALFFULL;
+ } else {
+ wake = (devpriv->ai_scan_count * scanlen)
+ - devpriv->ai_scan_pos;
+ }
+ }
+ if (wake >= PCI230_ADC_FIFOLEVEL_HALFFULL) {
+ triglev = PCI230_ADC_INT_FIFO_HALF;
+ } else {
+ if ((wake > 1) && (devpriv->hwver > 0)) {
+ /* PCI230+/260+ programmable FIFO interrupt level. */
+ if (devpriv->adcfifothresh != wake) {
+ devpriv->adcfifothresh = wake;
+ outw(wake, dev->iobase + PCI230P_ADCFFTH);
+ }
+ triglev = PCI230P_ADC_INT_FIFO_THRESH;
+ } else {
+ triglev = PCI230_ADC_INT_FIFO_NEMPTY;
+ }
+ }
+ adccon = (devpriv->adccon & ~PCI230_ADC_INT_FIFO_MASK) | triglev;
+ if (adccon != devpriv->adccon) {
+ devpriv->adccon = adccon;
+ outw(adccon, dev->iobase + PCI230_ADCCON);
+ }
+}
+
+static int pci230_ai_inttrig_convert(struct comedi_device * dev, struct comedi_subdevice * s,
+ unsigned int trig_num)
+{
+ unsigned long irqflags;
+
+ if (trig_num != 0)
+ return -EINVAL;
+
+ comedi_spin_lock_irqsave(&devpriv->ai_stop_spinlock, irqflags);
+ if (test_bit(AI_CMD_STARTED, &devpriv->state)) {
+ unsigned int delayus;
+
+ /* Trigger conversion by toggling Z2-CT2 output. Finish
+ * with output high. */
+ i8254_set_mode(devpriv->iobase1 + PCI230_Z2_CT_BASE, 0, 2,
+ I8254_MODE0);
+ i8254_set_mode(devpriv->iobase1 + PCI230_Z2_CT_BASE, 0, 2,
+ I8254_MODE1);
+ /* Delay. Should driver be responsible for this? An
+ * alternative would be to wait until conversion is complete,
+ * but we can't tell when it's complete because the ADC busy
+ * bit has a different meaning when FIFO enabled (and when
+ * FIFO not enabled, it only works for software triggers). */
+ if (((devpriv->adccon & PCI230_ADC_IM_MASK)
+ == PCI230_ADC_IM_DIF)
+ && (devpriv->hwver == 0)) {
+ /* PCI230/260 in differential mode */
+ delayus = 8;
+ } else {
+ /* single-ended or PCI230+/260+ */
+ delayus = 4;
+ }
+ comedi_spin_unlock_irqrestore(&devpriv->ai_stop_spinlock,
+ irqflags);
+ comedi_udelay(delayus);
+ } else {
+ comedi_spin_unlock_irqrestore(&devpriv->ai_stop_spinlock,
+ irqflags);
+ }
+
+ return 1;
+}
+
+static int pci230_ai_inttrig_scan_begin(struct comedi_device * dev,
+ struct comedi_subdevice * s, unsigned int trig_num)
+{
+ unsigned long irqflags;
+ unsigned char zgat;
+
+ if (trig_num != 0)
+ return -EINVAL;
+
+ comedi_spin_lock_irqsave(&devpriv->ai_stop_spinlock, irqflags);
+ if (test_bit(AI_CMD_STARTED, &devpriv->state)) {
+ /* Trigger scan by waggling CT0 gate source. */
+ zgat = GAT_CONFIG(0, GAT_GND);
+ outb(zgat, devpriv->iobase1 + PCI230_ZGAT_SCE);
+ zgat = GAT_CONFIG(0, GAT_VCC);
+ outb(zgat, devpriv->iobase1 + PCI230_ZGAT_SCE);
+ }
+ comedi_spin_unlock_irqrestore(&devpriv->ai_stop_spinlock, irqflags);
+
+ return 1;
+}
+
+static void pci230_ai_start(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ unsigned long irqflags;
+ unsigned short conv;
+ struct comedi_async *async = s->async;
+ struct comedi_cmd *cmd = &async->cmd;
+
+ set_bit(AI_CMD_STARTED, &devpriv->state);
+ if (!devpriv->ai_continuous && (devpriv->ai_scan_count == 0)) {
+ /* An empty acquisition! */
+ async->events |= COMEDI_CB_EOA;
+ pci230_ai_stop(dev, s);
+ comedi_event(dev, s);
+ } else {
+ /* Enable ADC FIFO trigger level interrupt. */
+ comedi_spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
+ devpriv->int_en |= PCI230_INT_ADC;
+ devpriv->ier |= PCI230_INT_ADC;
+ outb(devpriv->ier, devpriv->iobase1 + PCI230_INT_SCE);
+ comedi_spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
+
+ /* Update conversion trigger source which is currently set
+ * to CT2 output, which is currently stuck high. */
+ switch (cmd->convert_src) {
+ default:
+ conv = PCI230_ADC_TRIG_NONE;
+ break;
+ case TRIG_TIMER:
+ /* Using CT2 output. */
+ conv = PCI230_ADC_TRIG_Z2CT2;
+ break;
+ case TRIG_EXT:
+ if ((cmd->convert_arg & CR_EDGE) != 0) {
+ if ((cmd->convert_arg & CR_INVERT) == 0) {
+ /* Trigger on +ve edge. */
+ conv = PCI230_ADC_TRIG_EXTP;
+ } else {
+ /* Trigger on -ve edge. */
+ conv = PCI230_ADC_TRIG_EXTN;
+ }
+ } else {
+ /* Backwards compatibility. */
+ if (cmd->convert_arg != 0) {
+ /* Trigger on +ve edge. */
+ conv = PCI230_ADC_TRIG_EXTP;
+ } else {
+ /* Trigger on -ve edge. */
+ conv = PCI230_ADC_TRIG_EXTN;
+ }
+ }
+ break;
+ case TRIG_INT:
+ /* Use CT2 output for software trigger due to problems
+ * in differential mode on PCI230/260. */
+ conv = PCI230_ADC_TRIG_Z2CT2;
+ break;
+ }
+ devpriv->adccon = (devpriv->adccon & ~PCI230_ADC_TRIG_MASK)
+ | conv;
+ outw(devpriv->adccon, dev->iobase + PCI230_ADCCON);
+ if (cmd->convert_src == TRIG_INT) {
+ async->inttrig = pci230_ai_inttrig_convert;
+ }
+ /* Update FIFO interrupt trigger level, which is currently
+ * set to "full". */
+ pci230_ai_update_fifo_trigger_level(dev, s);
+ if (cmd->convert_src == TRIG_TIMER) {
+ /* Update timer gates. */
+ unsigned char zgat;
+
+ if (cmd->scan_begin_src != TRIG_FOLLOW) {
+ /* Conversion timer CT2 needs to be gated by
+ * inverted output of monostable CT2. */
+ zgat = GAT_CONFIG(2, GAT_NOUTNM2);
+ } else {
+ /* Conversion timer CT2 needs to be gated on
+ * continuously. */
+ zgat = GAT_CONFIG(2, GAT_VCC);
+ }
+ outb(zgat, devpriv->iobase1 + PCI230_ZGAT_SCE);
+ if (cmd->scan_begin_src != TRIG_FOLLOW) {
+ /* Set monostable CT0 trigger source. */
+ switch (cmd->scan_begin_src) {
+ default:
+ zgat = GAT_CONFIG(0, GAT_VCC);
+ break;
+ case TRIG_EXT:
+ /*
+ * For CT0 on PCI230, the external
+ * trigger (gate) signal comes from
+ * PPC0, which is channel 16 of the DIO
+ * subdevice. The application needs to
+ * configure this as an input in order
+ * to use it as an external scan
+ * trigger.
+ */
+ zgat = GAT_CONFIG(0, GAT_EXT);
+ break;
+ case TRIG_TIMER:
+ /*
+ * Monostable CT0 triggered by rising
+ * edge on inverted output of CT1
+ * (falling edge on CT1).
+ */
+ zgat = GAT_CONFIG(0, GAT_NOUTNM2);
+ break;
+ case TRIG_INT:
+ /*
+ * Monostable CT0 is triggered by
+ * inttrig function waggling the CT0
+ * gate source.
+ */
+ zgat = GAT_CONFIG(0, GAT_VCC);
+ break;
+ }
+ outb(zgat, devpriv->iobase1 + PCI230_ZGAT_SCE);
+ switch (cmd->scan_begin_src) {
+ case TRIG_TIMER:
+ /* Scan period timer CT1 needs to be
+ * gated on to start counting. */
+ zgat = GAT_CONFIG(1, GAT_VCC);
+ outb(zgat, devpriv->iobase1
+ + PCI230_ZGAT_SCE);
+ break;
+ case TRIG_INT:
+ async->inttrig =
+ pci230_ai_inttrig_scan_begin;
+ break;
+ }
+ }
+ } else if (cmd->convert_src != TRIG_INT) {
+ /* No longer need Z2-CT2. */
+ put_one_resource(dev, RES_Z2CT2, OWNER_AICMD);
+ }
+ }
+}
+
+static int pci230_ai_inttrig_start(struct comedi_device * dev, struct comedi_subdevice * s,
+ unsigned int trig_num)
+{
+ if (trig_num != 0)
+ return -EINVAL;
+
+ s->async->inttrig = NULLFUNC;
+ pci230_ai_start(dev, s);
+
+ return 1;
+}
+
+static int pci230_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ unsigned int i, chan, range, diff;
+ unsigned int res_mask;
+ unsigned short adccon, adcen;
+ unsigned char zgat;
+
+ /* Get the command. */
+ struct comedi_async *async = s->async;
+ struct comedi_cmd *cmd = &async->cmd;
+
+ /*
+ * Determine which shared resources are needed.
+ */
+ res_mask = 0;
+ /* Need Z2-CT2 to supply a conversion trigger source at a high
+ * logic level, even if not doing timed conversions. */
+ res_mask |= (1U << RES_Z2CT2);
+ if (cmd->scan_begin_src != TRIG_FOLLOW) {
+ /* Using Z2-CT0 monostable to gate Z2-CT2 conversion timer */
+ res_mask |= (1U << RES_Z2CT0);
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ /* Using Z2-CT1 for scan frequency */
+ res_mask |= (1U << RES_Z2CT1);
+ }
+ }
+ /* Claim resources. */
+ if (!get_resources(dev, res_mask, OWNER_AICMD)) {
+ return -EBUSY;
+ }
+
+ /* Get number of scans required. */
+ if (cmd->stop_src == TRIG_COUNT) {
+ devpriv->ai_scan_count = cmd->stop_arg;
+ devpriv->ai_continuous = 0;
+ } else {
+ /* TRIG_NONE, user calls cancel. */
+ devpriv->ai_scan_count = 0;
+ devpriv->ai_continuous = 1;
+ }
+ devpriv->ai_scan_pos = 0; /* Position within scan. */
+
+ /* Steps;
+ * - Set channel scan list.
+ * - Set channel gains.
+ * - Enable and reset FIFO, specify uni/bip, se/diff, and set
+ * start conversion source to point to something at a high logic
+ * level (we use the output of counter/timer 2 for this purpose.
+ * - PAUSE to allow things to settle down.
+ * - Reset the FIFO again because it needs resetting twice and there
+ * may have been a false conversion trigger on some versions of
+ * PCI230/260 due to the start conversion source being set to a
+ * high logic level.
+ * - Enable ADC FIFO level interrupt.
+ * - Set actual conversion trigger source and FIFO interrupt trigger
+ * level.
+ * - If convert_src is TRIG_TIMER, set up the timers.
+ */
+
+ adccon = PCI230_ADC_FIFO_EN;
+ adcen = 0;
+
+ if (CR_AREF(cmd->chanlist[0]) == AREF_DIFF) {
+ /* Differential - all channels must be differential. */
+ diff = 1;
+ adccon |= PCI230_ADC_IM_DIF;
+ } else {
+ /* Single ended - all channels must be single-ended. */
+ diff = 0;
+ adccon |= PCI230_ADC_IM_SE;
+ }
+
+ range = CR_RANGE(cmd->chanlist[0]);
+ devpriv->ai_bipolar = pci230_ai_bipolar[range];
+ if (devpriv->ai_bipolar) {
+ adccon |= PCI230_ADC_IR_BIP;
+ } else {
+ adccon |= PCI230_ADC_IR_UNI;
+ }
+ for (i = 0; i < cmd->chanlist_len; i++) {
+ unsigned int gainshift;
+
+ chan = CR_CHAN(cmd->chanlist[i]);
+ range = CR_RANGE(cmd->chanlist[i]);
+ if (diff) {
+ gainshift = 2 * chan;
+ if (devpriv->hwver == 0) {
+ /* Original PCI230/260 expects both inputs of
+ * the differential channel to be enabled. */
+ adcen |= 3 << gainshift;
+ } else {
+ /* PCI230+/260+ expects only one input of the
+ * differential channel to be enabled. */
+ adcen |= 1 << gainshift;
+ }
+ } else {
+ gainshift = (chan & ~1);
+ adcen |= 1 << chan;
+ }
+ devpriv->adcg = (devpriv->adcg & ~(3 << gainshift))
+ | (pci230_ai_gain[range] << gainshift);
+ }
+
+ /* Set channel scan list. */
+ outw(adcen, dev->iobase + PCI230_ADCEN);
+
+ /* Set channel gains. */
+ outw(devpriv->adcg, dev->iobase + PCI230_ADCG);
+
+ /* Set counter/timer 2 output high for use as the initial start
+ * conversion source. */
+ i8254_set_mode(devpriv->iobase1 + PCI230_Z2_CT_BASE, 0, 2, I8254_MODE1);
+
+ /* Temporarily use CT2 output as conversion trigger source and
+ * temporarily set FIFO interrupt trigger level to 'full'. */
+ adccon |= PCI230_ADC_INT_FIFO_FULL | PCI230_ADC_TRIG_Z2CT2;
+
+ /* Enable and reset FIFO, specify FIFO trigger level full, specify
+ * uni/bip, se/diff, and temporarily set the start conversion source
+ * to CT2 output. Note that CT2 output is currently high, and this
+ * will produce a false conversion trigger on some versions of the
+ * PCI230/260, but that will be dealt with later. */
+ devpriv->adccon = adccon;
+ outw(adccon | PCI230_ADC_FIFO_RESET, dev->iobase + PCI230_ADCCON);
+
+ /* Delay */
+ /* Failure to include this will result in the first few channels'-worth
+ * of data being corrupt, normally manifesting itself by large negative
+ * voltages. It seems the board needs time to settle between the first
+ * FIFO reset (above) and the second FIFO reset (below). Setting the
+ * channel gains and scan list _before_ the first FIFO reset also
+ * helps, though only slightly. */
+ comedi_udelay(25);
+
+ /* Reset FIFO again. */
+ outw(adccon | PCI230_ADC_FIFO_RESET, dev->iobase + PCI230_ADCCON);
+
+ if (cmd->convert_src == TRIG_TIMER) {
+ /* Set up CT2 as conversion timer, but gate it off for now.
+ * Note, counter/timer output 2 can be monitored on the
+ * connector: PCI230 pin 21, PCI260 pin 18. */
+ zgat = GAT_CONFIG(2, GAT_GND);
+ outb(zgat, devpriv->iobase1 + PCI230_ZGAT_SCE);
+ /* Set counter/timer 2 to the specified conversion period. */
+ pci230_ct_setup_ns_mode(dev, 2, I8254_MODE3, cmd->convert_arg,
+ cmd->flags & TRIG_ROUND_MASK);
+ if (cmd->scan_begin_src != TRIG_FOLLOW) {
+ /*
+ * Set up monostable on CT0 output for scan timing. A
+ * rising edge on the trigger (gate) input of CT0 will
+ * trigger the monostable, causing its output to go low
+ * for the configured period. The period depends on
+ * the conversion period and the number of conversions
+ * in the scan.
+ *
+ * Set the trigger high before setting up the
+ * monostable to stop it triggering. The trigger
+ * source will be changed later.
+ */
+ zgat = GAT_CONFIG(0, GAT_VCC);
+ outb(zgat, devpriv->iobase1 + PCI230_ZGAT_SCE);
+ pci230_ct_setup_ns_mode(dev, 0, I8254_MODE1,
+ ((uint64_t) cmd->convert_arg
+ * cmd->scan_end_arg), TRIG_ROUND_UP);
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ /*
+ * Monostable on CT0 will be triggered by
+ * output of CT1 at configured scan frequency.
+ *
+ * Set up CT1 but gate it off for now.
+ */
+ zgat = GAT_CONFIG(1, GAT_GND);
+ outb(zgat, devpriv->iobase1 + PCI230_ZGAT_SCE);
+ pci230_ct_setup_ns_mode(dev, 1, I8254_MODE3,
+ cmd->scan_begin_arg,
+ cmd->flags & TRIG_ROUND_MASK);
+ }
+ }
+ }
+
+ if (cmd->start_src == TRIG_INT) {
+ s->async->inttrig = pci230_ai_inttrig_start;
+ } else {
+ /* TRIG_NOW */
+ pci230_ai_start(dev, s);
+ }
+
+ return 0;
+}
+
+static unsigned int divide_ns(uint64_t ns, unsigned int timebase,
+ unsigned int round_mode)
+{
+ uint64_t div;
+ unsigned int rem;
+
+ div = ns;
+ rem = do_div(div, timebase);
+ round_mode &= TRIG_ROUND_MASK;
+ switch (round_mode) {
+ default:
+ case TRIG_ROUND_NEAREST:
+ div += (rem + (timebase / 2)) / timebase;
+ break;
+ case TRIG_ROUND_DOWN:
+ break;
+ case TRIG_ROUND_UP:
+ div += (rem + timebase - 1) / timebase;
+ break;
+ }
+ return div > UINT_MAX ? UINT_MAX : (unsigned int)div;
+}
+
+/* Given desired period in ns, returns the required internal clock source
+ * and gets the initial count. */
+static unsigned int pci230_choose_clk_count(uint64_t ns, unsigned int *count,
+ unsigned int round_mode)
+{
+ unsigned int clk_src, cnt;
+
+ for (clk_src = CLK_10MHZ;; clk_src++) {
+ cnt = divide_ns(ns, pci230_timebase[clk_src], round_mode);
+ if ((cnt <= 65536) || (clk_src == CLK_1KHZ)) {
+ break;
+ }
+ }
+ *count = cnt;
+ return clk_src;
+}
+
+static void pci230_ns_to_single_timer(unsigned int *ns, unsigned int round)
+{
+ unsigned int count;
+ unsigned int clk_src;
+
+ clk_src = pci230_choose_clk_count(*ns, &count, round);
+ *ns = count * pci230_timebase[clk_src];
+ return;
+}
+
+static void pci230_ct_setup_ns_mode(struct comedi_device * dev, unsigned int ct,
+ unsigned int mode, uint64_t ns, unsigned int round)
+{
+ unsigned int clk_src;
+ unsigned int count;
+
+ /* Set mode. */
+ i8254_set_mode(devpriv->iobase1 + PCI230_Z2_CT_BASE, 0, ct, mode);
+ /* Determine clock source and count. */
+ clk_src = pci230_choose_clk_count(ns, &count, round);
+ /* Program clock source. */
+ outb(CLK_CONFIG(ct, clk_src), devpriv->iobase1 + PCI230_ZCLK_SCE);
+ /* Set initial count. */
+ if (count >= 65536) {
+ count = 0;
+ }
+ i8254_write(devpriv->iobase1 + PCI230_Z2_CT_BASE, 0, ct, count);
+}
+
+static void pci230_cancel_ct(struct comedi_device * dev, unsigned int ct)
+{
+ i8254_set_mode(devpriv->iobase1 + PCI230_Z2_CT_BASE, 0, ct,
+ I8254_MODE1);
+ /* Counter ct, 8254 mode 1, initial count not written. */
+}
+
+/* Interrupt handler */
+static irqreturn_t pci230_interrupt(int irq, void *d PT_REGS_ARG)
+{
+ unsigned char status_int, valid_status_int;
+ struct comedi_device *dev = (struct comedi_device *) d;
+ struct comedi_subdevice *s;
+ unsigned long irqflags;
+
+ /* Read interrupt status/enable register. */
+ status_int = inb(devpriv->iobase1 + PCI230_INT_STAT);
+
+ if (status_int == PCI230_INT_DISABLE) {
+ return IRQ_NONE;
+ }
+
+ comedi_spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
+ valid_status_int = devpriv->int_en & status_int;
+ /* Disable triggered interrupts.
+ * (Only those interrupts that need re-enabling, are, later in the
+ * handler). */
+ devpriv->ier = devpriv->int_en & ~status_int;
+ outb(devpriv->ier, devpriv->iobase1 + PCI230_INT_SCE);
+ devpriv->intr_running = 1;
+ devpriv->intr_cpuid = THISCPU;
+ comedi_spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
+
+ /*
+ * Check the source of interrupt and handle it.
+ * The PCI230 can cope with concurrent ADC, DAC, PPI C0 and C3
+ * interrupts. However, at present (Comedi-0.7.60) does not allow
+ * concurrent execution of commands, instructions or a mixture of the
+ * two.
+ */
+
+ if ((valid_status_int & PCI230_INT_ZCLK_CT1) != 0) {
+ s = dev->write_subdev;
+ pci230_handle_ao_nofifo(dev, s);
+ comedi_event(dev, s);
+ }
+
+ if ((valid_status_int & PCI230P2_INT_DAC) != 0) {
+ s = dev->write_subdev;
+ pci230_handle_ao_fifo(dev, s);
+ comedi_event(dev, s);
+ }
+
+ if ((valid_status_int & PCI230_INT_ADC) != 0) {
+ s = dev->read_subdev;
+ pci230_handle_ai(dev, s);
+ comedi_event(dev, s);
+ }
+
+ /* Reenable interrupts. */
+ comedi_spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
+ if (devpriv->ier != devpriv->int_en) {
+ devpriv->ier = devpriv->int_en;
+ outb(devpriv->ier, devpriv->iobase1 + PCI230_INT_SCE);
+ }
+ devpriv->intr_running = 0;
+ comedi_spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
+
+ return IRQ_HANDLED;
+}
+
+static void pci230_handle_ao_nofifo(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ short data;
+ int i, ret;
+ struct comedi_async *async = s->async;
+ struct comedi_cmd *cmd = &async->cmd;
+
+ if (!devpriv->ao_continuous && (devpriv->ao_scan_count == 0)) {
+ return;
+ }
+
+ for (i = 0; i < cmd->chanlist_len; i++) {
+ /* Read sample from Comedi's circular buffer. */
+ ret = comedi_buf_get(s->async, &data);
+ if (ret == 0) {
+ s->async->events |= COMEDI_CB_OVERFLOW;
+ pci230_ao_stop(dev, s);
+ comedi_error(dev, "AO buffer underrun");
+ return;
+ }
+ /* Write value to DAC. */
+ pci230_ao_write_nofifo(dev, data, CR_CHAN(cmd->chanlist[i]));
+ }
+
+ async->events |= COMEDI_CB_BLOCK | COMEDI_CB_EOS;
+ if (!devpriv->ao_continuous) {
+ devpriv->ao_scan_count--;
+ if (devpriv->ao_scan_count == 0) {
+ /* End of acquisition. */
+ async->events |= COMEDI_CB_EOA;
+ pci230_ao_stop(dev, s);
+ }
+ }
+}
+
+/* Loads DAC FIFO (if using it) from buffer. */
+/* Returns 0 if AO finished due to completion or error, 1 if still going. */
+static int pci230_handle_ao_fifo(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ struct comedi_async *async = s->async;
+ struct comedi_cmd *cmd = &async->cmd;
+ unsigned int num_scans;
+ unsigned int room;
+ unsigned short dacstat;
+ unsigned int i, n;
+ unsigned int bytes_per_scan;
+ unsigned int events = 0;
+ int running;
+
+ /* Get DAC FIFO status. */
+ dacstat = inw(dev->iobase + PCI230_DACCON);
+
+ /* Determine number of scans available in buffer. */
+ bytes_per_scan = cmd->chanlist_len * sizeof(short);
+ num_scans = comedi_buf_read_n_available(async) / bytes_per_scan;
+ if (!devpriv->ao_continuous) {
+ /* Fixed number of scans. */
+ if (num_scans > devpriv->ao_scan_count) {
+ num_scans = devpriv->ao_scan_count;
+ }
+ if (devpriv->ao_scan_count == 0) {
+ /* End of acquisition. */
+ events |= COMEDI_CB_EOA;
+ }
+ }
+ if (events == 0) {
+ /* Check for FIFO underrun. */
+ if ((dacstat & PCI230P2_DAC_FIFO_UNDERRUN_LATCHED) != 0) {
+ comedi_error(dev, "AO FIFO underrun");
+ events |= COMEDI_CB_OVERFLOW | COMEDI_CB_ERROR;
+ }
+ /* Check for buffer underrun if FIFO less than half full
+ * (otherwise there will be loads of "DAC FIFO not half full"
+ * interrupts). */
+ if ((num_scans == 0)
+ && ((dacstat & PCI230P2_DAC_FIFO_HALF) == 0)) {
+ comedi_error(dev, "AO buffer underrun");
+ events |= COMEDI_CB_OVERFLOW | COMEDI_CB_ERROR;
+ }
+ }
+ if (events == 0) {
+ /* Determine how much room is in the FIFO (in samples). */
+ if ((dacstat & PCI230P2_DAC_FIFO_FULL) != 0) {
+ room = PCI230P2_DAC_FIFOROOM_FULL;
+ } else if ((dacstat & PCI230P2_DAC_FIFO_HALF) != 0) {
+ room = PCI230P2_DAC_FIFOROOM_HALFTOFULL;
+ } else if ((dacstat & PCI230P2_DAC_FIFO_EMPTY) != 0) {
+ room = PCI230P2_DAC_FIFOROOM_EMPTY;
+ } else {
+ room = PCI230P2_DAC_FIFOROOM_ONETOHALF;
+ }
+ /* Convert room to number of scans that can be added. */
+ room /= cmd->chanlist_len;
+ /* Determine number of scans to process. */
+ if (num_scans > room) {
+ num_scans = room;
+ }
+ /* Process scans. */
+ for (n = 0; n < num_scans; n++) {
+ for (i = 0; i < cmd->chanlist_len; i++) {
+ short datum;
+
+ comedi_buf_get(async, &datum);
+ pci230_ao_write_fifo(dev, datum,
+ CR_CHAN(cmd->chanlist[i]));
+ }
+ }
+ events |= COMEDI_CB_EOS | COMEDI_CB_BLOCK;
+ if (!devpriv->ao_continuous) {
+ devpriv->ao_scan_count -= num_scans;
+ if (devpriv->ao_scan_count == 0) {
+ /* All data for the command has been written
+ * to FIFO. Set FIFO interrupt trigger level
+ * to 'empty'. */
+ devpriv->daccon = (devpriv->daccon
+ & ~PCI230P2_DAC_INT_FIFO_MASK)
+ | PCI230P2_DAC_INT_FIFO_EMPTY;
+ outw(devpriv->daccon,
+ dev->iobase + PCI230_DACCON);
+ }
+ }
+ /* Check if FIFO underrun occurred while writing to FIFO. */
+ dacstat = inw(dev->iobase + PCI230_DACCON);
+ if ((dacstat & PCI230P2_DAC_FIFO_UNDERRUN_LATCHED) != 0) {
+ comedi_error(dev, "AO FIFO underrun");
+ events |= COMEDI_CB_OVERFLOW | COMEDI_CB_ERROR;
+ }
+ }
+ if ((events & (COMEDI_CB_EOA | COMEDI_CB_ERROR | COMEDI_CB_OVERFLOW))
+ != 0) {
+ /* Stopping AO due to completion or error. */
+ pci230_ao_stop(dev, s);
+ running = 0;
+ } else {
+ running = 1;
+ }
+ async->events |= events;
+ return running;
+}
+
+static void pci230_handle_ai(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ unsigned int events = 0;
+ unsigned int status_fifo;
+ unsigned int i;
+ unsigned int todo;
+ unsigned int fifoamount;
+ struct comedi_async *async = s->async;
+ unsigned int scanlen = async->cmd.scan_end_arg;
+
+ /* Determine number of samples to read. */
+ if (devpriv->ai_continuous) {
+ todo = PCI230_ADC_FIFOLEVEL_HALFFULL;
+ } else if (devpriv->ai_scan_count == 0) {
+ todo = 0;
+ } else if ((devpriv->ai_scan_count > PCI230_ADC_FIFOLEVEL_HALFFULL)
+ || (scanlen > PCI230_ADC_FIFOLEVEL_HALFFULL)) {
+ todo = PCI230_ADC_FIFOLEVEL_HALFFULL;
+ } else {
+ todo = (devpriv->ai_scan_count * scanlen)
+ - devpriv->ai_scan_pos;
+ if (todo > PCI230_ADC_FIFOLEVEL_HALFFULL) {
+ todo = PCI230_ADC_FIFOLEVEL_HALFFULL;
+ }
+ }
+
+ if (todo == 0) {
+ return;
+ }
+
+ fifoamount = 0;
+ for (i = 0; i < todo; i++) {
+ if (fifoamount == 0) {
+ /* Read FIFO state. */
+ status_fifo = inw(dev->iobase + PCI230_ADCCON);
+
+ if ((status_fifo & PCI230_ADC_FIFO_FULL_LATCHED) != 0) {
+ /* Report error otherwise FIFO overruns will go
+ * unnoticed by the caller. */
+ comedi_error(dev, "AI FIFO overrun");
+ events |= COMEDI_CB_OVERFLOW | COMEDI_CB_ERROR;
+ break;
+ } else if ((status_fifo & PCI230_ADC_FIFO_EMPTY) != 0) {
+ /* FIFO empty. */
+ break;
+ } else if ((status_fifo & PCI230_ADC_FIFO_HALF) != 0) {
+ /* FIFO half full. */
+ fifoamount = PCI230_ADC_FIFOLEVEL_HALFFULL;
+ } else {
+ /* FIFO not empty. */
+ if (devpriv->hwver > 0) {
+ /* Read PCI230+/260+ ADC FIFO level. */
+ fifoamount = inw(dev->iobase
+ + PCI230P_ADCFFLEV);
+ if (fifoamount == 0) {
+ /* Shouldn't happen. */
+ break;
+ }
+ } else {
+ fifoamount = 1;
+ }
+ }
+ }
+
+ /* Read sample and store in Comedi's circular buffer. */
+ if (comedi_buf_put(async, pci230_ai_read(dev)) == 0) {
+ events |= COMEDI_CB_ERROR | COMEDI_CB_OVERFLOW;
+ comedi_error(dev, "AI buffer overflow");
+ break;
+ }
+ fifoamount--;
+ devpriv->ai_scan_pos++;
+ if (devpriv->ai_scan_pos == scanlen) {
+ /* End of scan. */
+ devpriv->ai_scan_pos = 0;
+ devpriv->ai_scan_count--;
+ async->events |= COMEDI_CB_EOS;
+ }
+ }
+
+ if (!devpriv->ai_continuous && (devpriv->ai_scan_count == 0)) {
+ /* End of acquisition. */
+ events |= COMEDI_CB_EOA;
+ } else {
+ /* More samples required, tell Comedi to block. */
+ events |= COMEDI_CB_BLOCK;
+ }
+ async->events |= events;
+
+ if ((async->events & (COMEDI_CB_EOA | COMEDI_CB_ERROR |
+ COMEDI_CB_OVERFLOW)) != 0) {
+ /* disable hardware conversions */
+ pci230_ai_stop(dev, s);
+ } else {
+ /* update FIFO interrupt trigger level */
+ pci230_ai_update_fifo_trigger_level(dev, s);
+ }
+}
+
+static void pci230_ao_stop(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ unsigned long irqflags;
+ unsigned char intsrc;
+ int started;
+ struct comedi_cmd *cmd;
+
+ comedi_spin_lock_irqsave(&devpriv->ao_stop_spinlock, irqflags);
+ started = test_and_clear_bit(AO_CMD_STARTED, &devpriv->state);
+ comedi_spin_unlock_irqrestore(&devpriv->ao_stop_spinlock, irqflags);
+ if (!started) {
+ return;
+ }
+
+ cmd = &s->async->cmd;
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ /* Stop scan rate generator. */
+ pci230_cancel_ct(dev, 1);
+ }
+
+ /* Determine interrupt source. */
+ if (devpriv->hwver < 2) {
+ /* Not using DAC FIFO. Using CT1 interrupt. */
+ intsrc = PCI230_INT_ZCLK_CT1;
+ } else {
+ /* Using DAC FIFO interrupt. */
+ intsrc = PCI230P2_INT_DAC;
+ }
+ /* Disable interrupt and wait for interrupt routine to finish running
+ * unless we are called from the interrupt routine. */
+ comedi_spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
+ devpriv->int_en &= ~intsrc;
+ while (devpriv->intr_running && devpriv->intr_cpuid != THISCPU) {
+ comedi_spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
+ comedi_spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
+ }
+ if (devpriv->ier != devpriv->int_en) {
+ devpriv->ier = devpriv->int_en;
+ outb(devpriv->ier, devpriv->iobase1 + PCI230_INT_SCE);
+ }
+ comedi_spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
+
+ if (devpriv->hwver >= 2) {
+ /* Using DAC FIFO. Reset FIFO, clear underrun error,
+ * disable FIFO. */
+ devpriv->daccon &= PCI230_DAC_OR_MASK;
+ outw(devpriv->daccon | PCI230P2_DAC_FIFO_RESET
+ | PCI230P2_DAC_FIFO_UNDERRUN_CLEAR,
+ dev->iobase + PCI230_DACCON);
+ }
+
+ /* Release resources. */
+ put_all_resources(dev, OWNER_AOCMD);
+}
+
+static int pci230_ao_cancel(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ pci230_ao_stop(dev, s);
+ return 0;
+}
+
+static void pci230_ai_stop(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ unsigned long irqflags;
+ struct comedi_cmd *cmd;
+ int started;
+
+ comedi_spin_lock_irqsave(&devpriv->ai_stop_spinlock, irqflags);
+ started = test_and_clear_bit(AI_CMD_STARTED, &devpriv->state);
+ comedi_spin_unlock_irqrestore(&devpriv->ai_stop_spinlock, irqflags);
+ if (!started) {
+ return;
+ }
+
+ cmd = &s->async->cmd;
+ if (cmd->convert_src == TRIG_TIMER) {
+ /* Stop conversion rate generator. */
+ pci230_cancel_ct(dev, 2);
+ }
+ if (cmd->scan_begin_src != TRIG_FOLLOW) {
+ /* Stop scan period monostable. */
+ pci230_cancel_ct(dev, 0);
+ }
+
+ comedi_spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
+ /* Disable ADC interrupt and wait for interrupt routine to finish
+ * running unless we are called from the interrupt routine. */
+ devpriv->int_en &= ~PCI230_INT_ADC;
+ while (devpriv->intr_running && devpriv->intr_cpuid != THISCPU) {
+ comedi_spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
+ comedi_spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
+ }
+ if (devpriv->ier != devpriv->int_en) {
+ devpriv->ier = devpriv->int_en;
+ outb(devpriv->ier, devpriv->iobase1 + PCI230_INT_SCE);
+ }
+ comedi_spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
+
+ /* Reset FIFO, disable FIFO and set start conversion source to none.
+ * Keep se/diff and bip/uni settings */
+ devpriv->adccon = (devpriv->adccon & (PCI230_ADC_IR_MASK
+ | PCI230_ADC_IM_MASK)) | PCI230_ADC_TRIG_NONE;
+ outw(devpriv->adccon | PCI230_ADC_FIFO_RESET,
+ dev->iobase + PCI230_ADCCON);
+
+ /* Release resources. */
+ put_all_resources(dev, OWNER_AICMD);
+}
+
+static int pci230_ai_cancel(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ pci230_ai_stop(dev, s);
+ return 0;
+}
projects / linux-2.6-omap-h63xx.git / blobdiff