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Diffstat (limited to 'drivers/staging/comedi/drivers/amplc_pci230.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/amplc_pci230.c | 2977 |
1 files changed, 2977 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/amplc_pci230.c b/drivers/staging/comedi/drivers/amplc_pci230.c new file mode 100644 index 000000000000..0c9e5737e100 --- /dev/null +++ b/drivers/staging/comedi/drivers/amplc_pci230.c @@ -0,0 +1,2977 @@ + /* + 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; +} |