diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/cb_pcidas64.c')
-rw-r--r-- | drivers/staging/comedi/drivers/cb_pcidas64.c | 4079 |
1 files changed, 4079 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/cb_pcidas64.c b/drivers/staging/comedi/drivers/cb_pcidas64.c new file mode 100644 index 000000000..a94c33c3d --- /dev/null +++ b/drivers/staging/comedi/drivers/cb_pcidas64.c @@ -0,0 +1,4079 @@ +/* + comedi/drivers/cb_pcidas64.c + This is a driver for the ComputerBoards/MeasurementComputing PCI-DAS + 64xx, 60xx, and 4020 cards. + + Author: Frank Mori Hess <fmhess@users.sourceforge.net> + Copyright (C) 2001, 2002 Frank Mori Hess + + Thanks also go to the following people: + + Steve Rosenbluth, for providing the source code for + his pci-das6402 driver, and source code for working QNX pci-6402 + drivers by Greg Laird and Mariusz Bogacz. None of the code was + used directly here, but it was useful as an additional source of + documentation on how to program the boards. + + John Sims, for much testing and feedback on pcidas-4020 support. + + COMEDI - Linux Control and Measurement Device Interface + Copyright (C) 1997-8 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. +*/ + +/* + * Driver: cb_pcidas64 + * Description: MeasurementComputing PCI-DAS64xx, 60XX, and 4020 series + * with the PLX 9080 PCI controller + * Author: Frank Mori Hess <fmhess@users.sourceforge.net> + * Status: works + * Updated: Fri, 02 Nov 2012 18:58:55 +0000 + * Devices: [Measurement Computing] PCI-DAS6402/16 (cb_pcidas64), + * PCI-DAS6402/12, PCI-DAS64/M1/16, PCI-DAS64/M2/16, + * PCI-DAS64/M3/16, PCI-DAS6402/16/JR, PCI-DAS64/M1/16/JR, + * PCI-DAS64/M2/16/JR, PCI-DAS64/M3/16/JR, PCI-DAS64/M1/14, + * PCI-DAS64/M2/14, PCI-DAS64/M3/14, PCI-DAS6013, PCI-DAS6014, + * PCI-DAS6023, PCI-DAS6025, PCI-DAS6030, + * PCI-DAS6031, PCI-DAS6032, PCI-DAS6033, PCI-DAS6034, + * PCI-DAS6035, PCI-DAS6036, PCI-DAS6040, PCI-DAS6052, + * PCI-DAS6070, PCI-DAS6071, PCI-DAS4020/12 + * + * Configuration options: + * None. + * + * Manual attachment of PCI cards with the comedi_config utility is not + * supported by this driver; they are attached automatically. + * + * These boards may be autocalibrated with the comedi_calibrate utility. + * + * To select the bnc trigger input on the 4020 (instead of the dio input), + * specify a nonzero channel in the chanspec. If you wish to use an external + * master clock on the 4020, you may do so by setting the scan_begin_src + * to TRIG_OTHER, and using an INSN_CONFIG_TIMER_1 configuration insn + * to configure the divisor to use for the external clock. + * + * Some devices are not identified because the PCI device IDs are not yet + * known. If you have such a board, please let the maintainers know. + */ + +/* + +TODO: + make it return error if user attempts an ai command that uses the + external queue, and an ao command simultaneously user counter subdevice + there are a number of boards this driver will support when they are + fully released, but does not yet since the pci device id numbers + are not yet available. + + support prescaled 100khz clock for slow pacing (not available on 6000 + series?) + + make ao fifo size adjustable like ai fifo +*/ + +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/interrupt.h> + +#include "../comedi_pci.h" + +#include "8255.h" +#include "plx9080.h" + +#define TIMER_BASE 25 /* 40MHz master clock */ +/* 100kHz 'prescaled' clock for slow acquisition, + * maybe I'll support this someday */ +#define PRESCALED_TIMER_BASE 10000 +#define DMA_BUFFER_SIZE 0x1000 + +/* maximum value that can be loaded into board's 24-bit counters*/ +static const int max_counter_value = 0xffffff; + +/* PCI-DAS64xxx base addresses */ + +/* devpriv->main_iobase registers */ +enum write_only_registers { + INTR_ENABLE_REG = 0x0, /* interrupt enable register */ + HW_CONFIG_REG = 0x2, /* hardware config register */ + DAQ_SYNC_REG = 0xc, + DAQ_ATRIG_LOW_4020_REG = 0xc, + ADC_CONTROL0_REG = 0x10, /* adc control register 0 */ + ADC_CONTROL1_REG = 0x12, /* adc control register 1 */ + CALIBRATION_REG = 0x14, + /* lower 16 bits of adc sample interval counter */ + ADC_SAMPLE_INTERVAL_LOWER_REG = 0x16, + /* upper 8 bits of adc sample interval counter */ + ADC_SAMPLE_INTERVAL_UPPER_REG = 0x18, + /* lower 16 bits of delay interval counter */ + ADC_DELAY_INTERVAL_LOWER_REG = 0x1a, + /* upper 8 bits of delay interval counter */ + ADC_DELAY_INTERVAL_UPPER_REG = 0x1c, + /* lower 16 bits of hardware conversion/scan counter */ + ADC_COUNT_LOWER_REG = 0x1e, + /* upper 8 bits of hardware conversion/scan counter */ + ADC_COUNT_UPPER_REG = 0x20, + ADC_START_REG = 0x22, /* software trigger to start acquisition */ + ADC_CONVERT_REG = 0x24, /* initiates single conversion */ + ADC_QUEUE_CLEAR_REG = 0x26, /* clears adc queue */ + ADC_QUEUE_LOAD_REG = 0x28, /* loads adc queue */ + ADC_BUFFER_CLEAR_REG = 0x2a, + /* high channel for internal queue, use adc_chan_bits() inline above */ + ADC_QUEUE_HIGH_REG = 0x2c, + DAC_CONTROL0_REG = 0x50, /* dac control register 0 */ + DAC_CONTROL1_REG = 0x52, /* dac control register 0 */ + /* lower 16 bits of dac sample interval counter */ + DAC_SAMPLE_INTERVAL_LOWER_REG = 0x54, + /* upper 8 bits of dac sample interval counter */ + DAC_SAMPLE_INTERVAL_UPPER_REG = 0x56, + DAC_SELECT_REG = 0x60, + DAC_START_REG = 0x64, + DAC_BUFFER_CLEAR_REG = 0x66, /* clear dac buffer */ +}; + +static inline unsigned int dac_convert_reg(unsigned int channel) +{ + return 0x70 + (2 * (channel & 0x1)); +} + +static inline unsigned int dac_lsb_4020_reg(unsigned int channel) +{ + return 0x70 + (4 * (channel & 0x1)); +} + +static inline unsigned int dac_msb_4020_reg(unsigned int channel) +{ + return 0x72 + (4 * (channel & 0x1)); +} + +enum read_only_registers { + /* hardware status register, + * reading this apparently clears pending interrupts as well */ + HW_STATUS_REG = 0x0, + PIPE1_READ_REG = 0x4, + ADC_READ_PNTR_REG = 0x8, + LOWER_XFER_REG = 0x10, + ADC_WRITE_PNTR_REG = 0xc, + PREPOST_REG = 0x14, +}; + +enum read_write_registers { + I8255_4020_REG = 0x48, /* 8255 offset, for 4020 only */ + /* external channel/gain queue, uses same bits as ADC_QUEUE_LOAD_REG */ + ADC_QUEUE_FIFO_REG = 0x100, + ADC_FIFO_REG = 0x200, /* adc data fifo */ + /* dac data fifo, has weird interactions with external channel queue */ + DAC_FIFO_REG = 0x300, +}; + +/* dev->mmio registers */ +enum dio_counter_registers { + DIO_8255_OFFSET = 0x0, + DO_REG = 0x20, + DI_REG = 0x28, + DIO_DIRECTION_60XX_REG = 0x40, + DIO_DATA_60XX_REG = 0x48, +}; + +/* bit definitions for write-only registers */ + +enum intr_enable_contents { + ADC_INTR_SRC_MASK = 0x3, /* adc interrupt source mask */ + ADC_INTR_QFULL_BITS = 0x0, /* interrupt fifo quarter full */ + ADC_INTR_EOC_BITS = 0x1, /* interrupt end of conversion */ + ADC_INTR_EOSCAN_BITS = 0x2, /* interrupt end of scan */ + ADC_INTR_EOSEQ_BITS = 0x3, /* interrupt end of sequence mask */ + EN_ADC_INTR_SRC_BIT = 0x4, /* enable adc interrupt source */ + EN_ADC_DONE_INTR_BIT = 0x8, /* enable adc acquisition done intr */ + DAC_INTR_SRC_MASK = 0x30, + DAC_INTR_QEMPTY_BITS = 0x0, + DAC_INTR_HIGH_CHAN_BITS = 0x10, + EN_DAC_INTR_SRC_BIT = 0x40, /* enable dac interrupt source */ + EN_DAC_DONE_INTR_BIT = 0x80, + EN_ADC_ACTIVE_INTR_BIT = 0x200, /* enable adc active interrupt */ + EN_ADC_STOP_INTR_BIT = 0x400, /* enable adc stop trigger interrupt */ + EN_DAC_ACTIVE_INTR_BIT = 0x800, /* enable dac active interrupt */ + EN_DAC_UNDERRUN_BIT = 0x4000, /* enable dac underrun status bit */ + EN_ADC_OVERRUN_BIT = 0x8000, /* enable adc overrun status bit */ +}; + +enum hw_config_contents { + MASTER_CLOCK_4020_MASK = 0x3, /* master clock source mask for 4020 */ + INTERNAL_CLOCK_4020_BITS = 0x1, /* use 40 MHz internal master clock */ + BNC_CLOCK_4020_BITS = 0x2, /* use BNC input for master clock */ + EXT_CLOCK_4020_BITS = 0x3, /* use dio input for master clock */ + EXT_QUEUE_BIT = 0x200, /* use external channel/gain queue */ + /* use 225 nanosec strobe when loading dac instead of 50 nanosec */ + SLOW_DAC_BIT = 0x400, + /* bit with unknown function yet given as default value in pci-das64 + * manual */ + HW_CONFIG_DUMMY_BITS = 0x2000, + /* bit selects channels 1/0 for analog input/output, otherwise 0/1 */ + DMA_CH_SELECT_BIT = 0x8000, + FIFO_SIZE_REG = 0x4, /* allows adjustment of fifo sizes */ + DAC_FIFO_SIZE_MASK = 0xff00, /* bits that set dac fifo size */ + DAC_FIFO_BITS = 0xf800, /* 8k sample ao fifo */ +}; +#define DAC_FIFO_SIZE 0x2000 + +enum daq_atrig_low_4020_contents { + /* use trig/ext clk bnc input for analog gate signal */ + EXT_AGATE_BNC_BIT = 0x8000, + /* use trig/ext clk bnc input for external stop trigger signal */ + EXT_STOP_TRIG_BNC_BIT = 0x4000, + /* use trig/ext clk bnc input for external start trigger signal */ + EXT_START_TRIG_BNC_BIT = 0x2000, +}; + +static inline uint16_t analog_trig_low_threshold_bits(uint16_t threshold) +{ + return threshold & 0xfff; +} + +enum adc_control0_contents { + ADC_GATE_SRC_MASK = 0x3, /* bits that select gate */ + ADC_SOFT_GATE_BITS = 0x1, /* software gate */ + ADC_EXT_GATE_BITS = 0x2, /* external digital gate */ + ADC_ANALOG_GATE_BITS = 0x3, /* analog level gate */ + ADC_GATE_LEVEL_BIT = 0x4, /* level-sensitive gate (for digital) */ + ADC_GATE_POLARITY_BIT = 0x8, /* gate active low */ + ADC_START_TRIG_SOFT_BITS = 0x10, + ADC_START_TRIG_EXT_BITS = 0x20, + ADC_START_TRIG_ANALOG_BITS = 0x30, + ADC_START_TRIG_MASK = 0x30, + ADC_START_TRIG_FALLING_BIT = 0x40, /* trig 1 uses falling edge */ + /* external pacing uses falling edge */ + ADC_EXT_CONV_FALLING_BIT = 0x800, + /* enable hardware scan counter */ + ADC_SAMPLE_COUNTER_EN_BIT = 0x1000, + ADC_DMA_DISABLE_BIT = 0x4000, /* disables dma */ + ADC_ENABLE_BIT = 0x8000, /* master adc enable */ +}; + +enum adc_control1_contents { + /* should be set for boards with > 16 channels */ + ADC_QUEUE_CONFIG_BIT = 0x1, + CONVERT_POLARITY_BIT = 0x10, + EOC_POLARITY_BIT = 0x20, + ADC_SW_GATE_BIT = 0x40, /* software gate of adc */ + ADC_DITHER_BIT = 0x200, /* turn on extra noise for dithering */ + RETRIGGER_BIT = 0x800, + ADC_LO_CHANNEL_4020_MASK = 0x300, + ADC_HI_CHANNEL_4020_MASK = 0xc00, + TWO_CHANNEL_4020_BITS = 0x1000, /* two channel mode for 4020 */ + FOUR_CHANNEL_4020_BITS = 0x2000, /* four channel mode for 4020 */ + CHANNEL_MODE_4020_MASK = 0x3000, + ADC_MODE_MASK = 0xf000, +}; + +static inline uint16_t adc_lo_chan_4020_bits(unsigned int channel) +{ + return (channel & 0x3) << 8; +}; + +static inline uint16_t adc_hi_chan_4020_bits(unsigned int channel) +{ + return (channel & 0x3) << 10; +}; + +static inline uint16_t adc_mode_bits(unsigned int mode) +{ + return (mode & 0xf) << 12; +}; + +enum calibration_contents { + SELECT_8800_BIT = 0x1, + SELECT_8402_64XX_BIT = 0x2, + SELECT_1590_60XX_BIT = 0x2, + CAL_EN_64XX_BIT = 0x40, /* calibration enable for 64xx series */ + SERIAL_DATA_IN_BIT = 0x80, + SERIAL_CLOCK_BIT = 0x100, + CAL_EN_60XX_BIT = 0x200, /* calibration enable for 60xx series */ + CAL_GAIN_BIT = 0x800, +}; + +/* calibration sources for 6025 are: + * 0 : ground + * 1 : 10V + * 2 : 5V + * 3 : 0.5V + * 4 : 0.05V + * 5 : ground + * 6 : dac channel 0 + * 7 : dac channel 1 + */ + +static inline uint16_t adc_src_bits(unsigned int source) +{ + return (source & 0xf) << 3; +}; + +static inline uint16_t adc_convert_chan_4020_bits(unsigned int channel) +{ + return (channel & 0x3) << 8; +}; + +enum adc_queue_load_contents { + UNIP_BIT = 0x800, /* unipolar/bipolar bit */ + ADC_SE_DIFF_BIT = 0x1000, /* single-ended/ differential bit */ + /* non-referenced single-ended (common-mode input) */ + ADC_COMMON_BIT = 0x2000, + QUEUE_EOSEQ_BIT = 0x4000, /* queue end of sequence */ + QUEUE_EOSCAN_BIT = 0x8000, /* queue end of scan */ +}; + +static inline uint16_t adc_chan_bits(unsigned int channel) +{ + return channel & 0x3f; +}; + +enum dac_control0_contents { + DAC_ENABLE_BIT = 0x8000, /* dac controller enable bit */ + DAC_CYCLIC_STOP_BIT = 0x4000, + DAC_WAVEFORM_MODE_BIT = 0x100, + DAC_EXT_UPDATE_FALLING_BIT = 0x80, + DAC_EXT_UPDATE_ENABLE_BIT = 0x40, + WAVEFORM_TRIG_MASK = 0x30, + WAVEFORM_TRIG_DISABLED_BITS = 0x0, + WAVEFORM_TRIG_SOFT_BITS = 0x10, + WAVEFORM_TRIG_EXT_BITS = 0x20, + WAVEFORM_TRIG_ADC1_BITS = 0x30, + WAVEFORM_TRIG_FALLING_BIT = 0x8, + WAVEFORM_GATE_LEVEL_BIT = 0x4, + WAVEFORM_GATE_ENABLE_BIT = 0x2, + WAVEFORM_GATE_SELECT_BIT = 0x1, +}; + +enum dac_control1_contents { + DAC_WRITE_POLARITY_BIT = 0x800, /* board-dependent setting */ + DAC1_EXT_REF_BIT = 0x200, + DAC0_EXT_REF_BIT = 0x100, + DAC_OUTPUT_ENABLE_BIT = 0x80, /* dac output enable bit */ + DAC_UPDATE_POLARITY_BIT = 0x40, /* board-dependent setting */ + DAC_SW_GATE_BIT = 0x20, + DAC1_UNIPOLAR_BIT = 0x8, + DAC0_UNIPOLAR_BIT = 0x2, +}; + +/* bit definitions for read-only registers */ +enum hw_status_contents { + DAC_UNDERRUN_BIT = 0x1, + ADC_OVERRUN_BIT = 0x2, + DAC_ACTIVE_BIT = 0x4, + ADC_ACTIVE_BIT = 0x8, + DAC_INTR_PENDING_BIT = 0x10, + ADC_INTR_PENDING_BIT = 0x20, + DAC_DONE_BIT = 0x40, + ADC_DONE_BIT = 0x80, + EXT_INTR_PENDING_BIT = 0x100, + ADC_STOP_BIT = 0x200, +}; + +static inline uint16_t pipe_full_bits(uint16_t hw_status_bits) +{ + return (hw_status_bits >> 10) & 0x3; +}; + +static inline unsigned int dma_chain_flag_bits(uint16_t prepost_bits) +{ + return (prepost_bits >> 6) & 0x3; +} + +static inline unsigned int adc_upper_read_ptr_code(uint16_t prepost_bits) +{ + return (prepost_bits >> 12) & 0x3; +} + +static inline unsigned int adc_upper_write_ptr_code(uint16_t prepost_bits) +{ + return (prepost_bits >> 14) & 0x3; +} + +/* I2C addresses for 4020 */ +enum i2c_addresses { + RANGE_CAL_I2C_ADDR = 0x20, + CALDAC0_I2C_ADDR = 0xc, + CALDAC1_I2C_ADDR = 0xd, +}; + +enum range_cal_i2c_contents { + /* bits that set what source the adc converter measures */ + ADC_SRC_4020_MASK = 0x70, + /* make bnc trig/ext clock threshold 0V instead of 2.5V */ + BNC_TRIG_THRESHOLD_0V_BIT = 0x80, +}; + +static inline uint8_t adc_src_4020_bits(unsigned int source) +{ + return (source << 4) & ADC_SRC_4020_MASK; +}; + +static inline uint8_t attenuate_bit(unsigned int channel) +{ + /* attenuate channel (+-5V input range) */ + return 1 << (channel & 0x3); +}; + +/* analog input ranges for 64xx boards */ +static const struct comedi_lrange ai_ranges_64xx = { + 8, { + BIP_RANGE(10), + BIP_RANGE(5), + BIP_RANGE(2.5), + BIP_RANGE(1.25), + UNI_RANGE(10), + UNI_RANGE(5), + UNI_RANGE(2.5), + UNI_RANGE(1.25) + } +}; + +static const uint8_t ai_range_code_64xx[8] = { + 0x0, 0x1, 0x2, 0x3, /* bipolar 10, 5, 2,5, 1.25 */ + 0x8, 0x9, 0xa, 0xb /* unipolar 10, 5, 2.5, 1.25 */ +}; + +/* analog input ranges for 64-Mx boards */ +static const struct comedi_lrange ai_ranges_64_mx = { + 7, { + BIP_RANGE(5), + BIP_RANGE(2.5), + BIP_RANGE(1.25), + BIP_RANGE(0.625), + UNI_RANGE(5), + UNI_RANGE(2.5), + UNI_RANGE(1.25) + } +}; + +static const uint8_t ai_range_code_64_mx[7] = { + 0x0, 0x1, 0x2, 0x3, /* bipolar 5, 2.5, 1.25, 0.625 */ + 0x9, 0xa, 0xb /* unipolar 5, 2.5, 1.25 */ +}; + +/* analog input ranges for 60xx boards */ +static const struct comedi_lrange ai_ranges_60xx = { + 4, { + BIP_RANGE(10), + BIP_RANGE(5), + BIP_RANGE(0.5), + BIP_RANGE(0.05) + } +}; + +static const uint8_t ai_range_code_60xx[4] = { + 0x0, 0x1, 0x4, 0x7 /* bipolar 10, 5, 0.5, 0.05 */ +}; + +/* analog input ranges for 6030, etc boards */ +static const struct comedi_lrange ai_ranges_6030 = { + 14, { + BIP_RANGE(10), + BIP_RANGE(5), + BIP_RANGE(2), + BIP_RANGE(1), + BIP_RANGE(0.5), + BIP_RANGE(0.2), + BIP_RANGE(0.1), + UNI_RANGE(10), + UNI_RANGE(5), + UNI_RANGE(2), + UNI_RANGE(1), + UNI_RANGE(0.5), + UNI_RANGE(0.2), + UNI_RANGE(0.1) + } +}; + +static const uint8_t ai_range_code_6030[14] = { + 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, /* bip 10, 5, 2, 1, 0.5, 0.2, 0.1 */ + 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf /* uni 10, 5, 2, 1, 0.5, 0.2, 0.1 */ +}; + +/* analog input ranges for 6052, etc boards */ +static const struct comedi_lrange ai_ranges_6052 = { + 15, { + BIP_RANGE(10), + BIP_RANGE(5), + BIP_RANGE(2.5), + BIP_RANGE(1), + BIP_RANGE(0.5), + BIP_RANGE(0.25), + BIP_RANGE(0.1), + BIP_RANGE(0.05), + UNI_RANGE(10), + UNI_RANGE(5), + UNI_RANGE(2), + UNI_RANGE(1), + UNI_RANGE(0.5), + UNI_RANGE(0.2), + UNI_RANGE(0.1) + } +}; + +static const uint8_t ai_range_code_6052[15] = { + 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, /* bipolar 10 ... 0.05 */ + 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf /* unipolar 10 ... 0.1 */ +}; + +/* analog input ranges for 4020 board */ +static const struct comedi_lrange ai_ranges_4020 = { + 2, { + BIP_RANGE(5), + BIP_RANGE(1) + } +}; + +/* analog output ranges */ +static const struct comedi_lrange ao_ranges_64xx = { + 4, { + BIP_RANGE(5), + BIP_RANGE(10), + UNI_RANGE(5), + UNI_RANGE(10) + } +}; + +static const int ao_range_code_64xx[] = { + 0x0, + 0x1, + 0x2, + 0x3, +}; + +static const int ao_range_code_60xx[] = { + 0x0, +}; + +static const struct comedi_lrange ao_ranges_6030 = { + 2, { + BIP_RANGE(10), + UNI_RANGE(10) + } +}; + +static const int ao_range_code_6030[] = { + 0x0, + 0x2, +}; + +static const struct comedi_lrange ao_ranges_4020 = { + 2, { + BIP_RANGE(5), + BIP_RANGE(10) + } +}; + +static const int ao_range_code_4020[] = { + 0x1, + 0x0, +}; + +enum register_layout { + LAYOUT_60XX, + LAYOUT_64XX, + LAYOUT_4020, +}; + +struct hw_fifo_info { + unsigned int num_segments; + unsigned int max_segment_length; + unsigned int sample_packing_ratio; + uint16_t fifo_size_reg_mask; +}; + +enum pcidas64_boardid { + BOARD_PCIDAS6402_16, + BOARD_PCIDAS6402_12, + BOARD_PCIDAS64_M1_16, + BOARD_PCIDAS64_M2_16, + BOARD_PCIDAS64_M3_16, + BOARD_PCIDAS6013, + BOARD_PCIDAS6014, + BOARD_PCIDAS6023, + BOARD_PCIDAS6025, + BOARD_PCIDAS6030, + BOARD_PCIDAS6031, + BOARD_PCIDAS6032, + BOARD_PCIDAS6033, + BOARD_PCIDAS6034, + BOARD_PCIDAS6035, + BOARD_PCIDAS6036, + BOARD_PCIDAS6040, + BOARD_PCIDAS6052, + BOARD_PCIDAS6070, + BOARD_PCIDAS6071, + BOARD_PCIDAS4020_12, + BOARD_PCIDAS6402_16_JR, + BOARD_PCIDAS64_M1_16_JR, + BOARD_PCIDAS64_M2_16_JR, + BOARD_PCIDAS64_M3_16_JR, + BOARD_PCIDAS64_M1_14, + BOARD_PCIDAS64_M2_14, + BOARD_PCIDAS64_M3_14, +}; + +struct pcidas64_board { + const char *name; + int ai_se_chans; /* number of ai inputs in single-ended mode */ + int ai_bits; /* analog input resolution */ + int ai_speed; /* fastest conversion period in ns */ + const struct comedi_lrange *ai_range_table; + const uint8_t *ai_range_code; + int ao_nchan; /* number of analog out channels */ + int ao_bits; /* analog output resolution */ + int ao_scan_speed; /* analog output scan speed */ + const struct comedi_lrange *ao_range_table; + const int *ao_range_code; + const struct hw_fifo_info *const ai_fifo; + /* different board families have slightly different registers */ + enum register_layout layout; + unsigned has_8255:1; +}; + +static const struct hw_fifo_info ai_fifo_4020 = { + .num_segments = 2, + .max_segment_length = 0x8000, + .sample_packing_ratio = 2, + .fifo_size_reg_mask = 0x7f, +}; + +static const struct hw_fifo_info ai_fifo_64xx = { + .num_segments = 4, + .max_segment_length = 0x800, + .sample_packing_ratio = 1, + .fifo_size_reg_mask = 0x3f, +}; + +static const struct hw_fifo_info ai_fifo_60xx = { + .num_segments = 4, + .max_segment_length = 0x800, + .sample_packing_ratio = 1, + .fifo_size_reg_mask = 0x7f, +}; + +/* maximum number of dma transfers we will chain together into a ring + * (and the maximum number of dma buffers we maintain) */ +#define MAX_AI_DMA_RING_COUNT (0x80000 / DMA_BUFFER_SIZE) +#define MIN_AI_DMA_RING_COUNT (0x10000 / DMA_BUFFER_SIZE) +#define AO_DMA_RING_COUNT (0x10000 / DMA_BUFFER_SIZE) +static inline unsigned int ai_dma_ring_count(const struct pcidas64_board *board) +{ + if (board->layout == LAYOUT_4020) + return MAX_AI_DMA_RING_COUNT; + + return MIN_AI_DMA_RING_COUNT; +} + +static const int bytes_in_sample = 2; + +static const struct pcidas64_board pcidas64_boards[] = { + [BOARD_PCIDAS6402_16] = { + .name = "pci-das6402/16", + .ai_se_chans = 64, + .ai_bits = 16, + .ai_speed = 5000, + .ao_nchan = 2, + .ao_bits = 16, + .ao_scan_speed = 10000, + .layout = LAYOUT_64XX, + .ai_range_table = &ai_ranges_64xx, + .ai_range_code = ai_range_code_64xx, + .ao_range_table = &ao_ranges_64xx, + .ao_range_code = ao_range_code_64xx, + .ai_fifo = &ai_fifo_64xx, + .has_8255 = 1, + }, + [BOARD_PCIDAS6402_12] = { + .name = "pci-das6402/12", /* XXX check */ + .ai_se_chans = 64, + .ai_bits = 12, + .ai_speed = 5000, + .ao_nchan = 2, + .ao_bits = 12, + .ao_scan_speed = 10000, + .layout = LAYOUT_64XX, + .ai_range_table = &ai_ranges_64xx, + .ai_range_code = ai_range_code_64xx, + .ao_range_table = &ao_ranges_64xx, + .ao_range_code = ao_range_code_64xx, + .ai_fifo = &ai_fifo_64xx, + .has_8255 = 1, + }, + [BOARD_PCIDAS64_M1_16] = { + .name = "pci-das64/m1/16", + .ai_se_chans = 64, + .ai_bits = 16, + .ai_speed = 1000, + .ao_nchan = 2, + .ao_bits = 16, + .ao_scan_speed = 10000, + .layout = LAYOUT_64XX, + .ai_range_table = &ai_ranges_64_mx, + .ai_range_code = ai_range_code_64_mx, + .ao_range_table = &ao_ranges_64xx, + .ao_range_code = ao_range_code_64xx, + .ai_fifo = &ai_fifo_64xx, + .has_8255 = 1, + }, + [BOARD_PCIDAS64_M2_16] = { + .name = "pci-das64/m2/16", + .ai_se_chans = 64, + .ai_bits = 16, + .ai_speed = 500, + .ao_nchan = 2, + .ao_bits = 16, + .ao_scan_speed = 10000, + .layout = LAYOUT_64XX, + .ai_range_table = &ai_ranges_64_mx, + .ai_range_code = ai_range_code_64_mx, + .ao_range_table = &ao_ranges_64xx, + .ao_range_code = ao_range_code_64xx, + .ai_fifo = &ai_fifo_64xx, + .has_8255 = 1, + }, + [BOARD_PCIDAS64_M3_16] = { + .name = "pci-das64/m3/16", + .ai_se_chans = 64, + .ai_bits = 16, + .ai_speed = 333, + .ao_nchan = 2, + .ao_bits = 16, + .ao_scan_speed = 10000, + .layout = LAYOUT_64XX, + .ai_range_table = &ai_ranges_64_mx, + .ai_range_code = ai_range_code_64_mx, + .ao_range_table = &ao_ranges_64xx, + .ao_range_code = ao_range_code_64xx, + .ai_fifo = &ai_fifo_64xx, + .has_8255 = 1, + }, + [BOARD_PCIDAS6013] = { + .name = "pci-das6013", + .ai_se_chans = 16, + .ai_bits = 16, + .ai_speed = 5000, + .ao_nchan = 0, + .ao_bits = 16, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_60xx, + .ai_range_code = ai_range_code_60xx, + .ao_range_table = &range_bipolar10, + .ao_range_code = ao_range_code_60xx, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 0, + }, + [BOARD_PCIDAS6014] = { + .name = "pci-das6014", + .ai_se_chans = 16, + .ai_bits = 16, + .ai_speed = 5000, + .ao_nchan = 2, + .ao_bits = 16, + .ao_scan_speed = 100000, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_60xx, + .ai_range_code = ai_range_code_60xx, + .ao_range_table = &range_bipolar10, + .ao_range_code = ao_range_code_60xx, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 0, + }, + [BOARD_PCIDAS6023] = { + .name = "pci-das6023", + .ai_se_chans = 16, + .ai_bits = 12, + .ai_speed = 5000, + .ao_nchan = 0, + .ao_scan_speed = 100000, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_60xx, + .ai_range_code = ai_range_code_60xx, + .ao_range_table = &range_bipolar10, + .ao_range_code = ao_range_code_60xx, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 1, + }, + [BOARD_PCIDAS6025] = { + .name = "pci-das6025", + .ai_se_chans = 16, + .ai_bits = 12, + .ai_speed = 5000, + .ao_nchan = 2, + .ao_bits = 12, + .ao_scan_speed = 100000, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_60xx, + .ai_range_code = ai_range_code_60xx, + .ao_range_table = &range_bipolar10, + .ao_range_code = ao_range_code_60xx, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 1, + }, + [BOARD_PCIDAS6030] = { + .name = "pci-das6030", + .ai_se_chans = 16, + .ai_bits = 16, + .ai_speed = 10000, + .ao_nchan = 2, + .ao_bits = 16, + .ao_scan_speed = 10000, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_6030, + .ai_range_code = ai_range_code_6030, + .ao_range_table = &ao_ranges_6030, + .ao_range_code = ao_range_code_6030, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 0, + }, + [BOARD_PCIDAS6031] = { + .name = "pci-das6031", + .ai_se_chans = 64, + .ai_bits = 16, + .ai_speed = 10000, + .ao_nchan = 2, + .ao_bits = 16, + .ao_scan_speed = 10000, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_6030, + .ai_range_code = ai_range_code_6030, + .ao_range_table = &ao_ranges_6030, + .ao_range_code = ao_range_code_6030, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 0, + }, + [BOARD_PCIDAS6032] = { + .name = "pci-das6032", + .ai_se_chans = 16, + .ai_bits = 16, + .ai_speed = 10000, + .ao_nchan = 0, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_6030, + .ai_range_code = ai_range_code_6030, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 0, + }, + [BOARD_PCIDAS6033] = { + .name = "pci-das6033", + .ai_se_chans = 64, + .ai_bits = 16, + .ai_speed = 10000, + .ao_nchan = 0, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_6030, + .ai_range_code = ai_range_code_6030, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 0, + }, + [BOARD_PCIDAS6034] = { + .name = "pci-das6034", + .ai_se_chans = 16, + .ai_bits = 16, + .ai_speed = 5000, + .ao_nchan = 0, + .ao_scan_speed = 0, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_60xx, + .ai_range_code = ai_range_code_60xx, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 0, + }, + [BOARD_PCIDAS6035] = { + .name = "pci-das6035", + .ai_se_chans = 16, + .ai_bits = 16, + .ai_speed = 5000, + .ao_nchan = 2, + .ao_bits = 12, + .ao_scan_speed = 100000, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_60xx, + .ai_range_code = ai_range_code_60xx, + .ao_range_table = &range_bipolar10, + .ao_range_code = ao_range_code_60xx, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 0, + }, + [BOARD_PCIDAS6036] = { + .name = "pci-das6036", + .ai_se_chans = 16, + .ai_bits = 16, + .ai_speed = 5000, + .ao_nchan = 2, + .ao_bits = 16, + .ao_scan_speed = 100000, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_60xx, + .ai_range_code = ai_range_code_60xx, + .ao_range_table = &range_bipolar10, + .ao_range_code = ao_range_code_60xx, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 0, + }, + [BOARD_PCIDAS6040] = { + .name = "pci-das6040", + .ai_se_chans = 16, + .ai_bits = 12, + .ai_speed = 2000, + .ao_nchan = 2, + .ao_bits = 12, + .ao_scan_speed = 1000, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_6052, + .ai_range_code = ai_range_code_6052, + .ao_range_table = &ao_ranges_6030, + .ao_range_code = ao_range_code_6030, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 0, + }, + [BOARD_PCIDAS6052] = { + .name = "pci-das6052", + .ai_se_chans = 16, + .ai_bits = 16, + .ai_speed = 3333, + .ao_nchan = 2, + .ao_bits = 16, + .ao_scan_speed = 3333, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_6052, + .ai_range_code = ai_range_code_6052, + .ao_range_table = &ao_ranges_6030, + .ao_range_code = ao_range_code_6030, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 0, + }, + [BOARD_PCIDAS6070] = { + .name = "pci-das6070", + .ai_se_chans = 16, + .ai_bits = 12, + .ai_speed = 800, + .ao_nchan = 2, + .ao_bits = 12, + .ao_scan_speed = 1000, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_6052, + .ai_range_code = ai_range_code_6052, + .ao_range_table = &ao_ranges_6030, + .ao_range_code = ao_range_code_6030, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 0, + }, + [BOARD_PCIDAS6071] = { + .name = "pci-das6071", + .ai_se_chans = 64, + .ai_bits = 12, + .ai_speed = 800, + .ao_nchan = 2, + .ao_bits = 12, + .ao_scan_speed = 1000, + .layout = LAYOUT_60XX, + .ai_range_table = &ai_ranges_6052, + .ai_range_code = ai_range_code_6052, + .ao_range_table = &ao_ranges_6030, + .ao_range_code = ao_range_code_6030, + .ai_fifo = &ai_fifo_60xx, + .has_8255 = 0, + }, + [BOARD_PCIDAS4020_12] = { + .name = "pci-das4020/12", + .ai_se_chans = 4, + .ai_bits = 12, + .ai_speed = 50, + .ao_bits = 12, + .ao_nchan = 2, + .ao_scan_speed = 0, /* no hardware pacing on ao */ + .layout = LAYOUT_4020, + .ai_range_table = &ai_ranges_4020, + .ao_range_table = &ao_ranges_4020, + .ao_range_code = ao_range_code_4020, + .ai_fifo = &ai_fifo_4020, + .has_8255 = 1, + }, +#if 0 + /* + * The device id for these boards is unknown + */ + + [BOARD_PCIDAS6402_16_JR] = { + .name = "pci-das6402/16/jr", + .ai_se_chans = 64, + .ai_bits = 16, + .ai_speed = 5000, + .ao_nchan = 0, + .ao_scan_speed = 10000, + .layout = LAYOUT_64XX, + .ai_range_table = &ai_ranges_64xx, + .ai_range_code = ai_range_code_64xx, + .ai_fifo = ai_fifo_64xx, + .has_8255 = 1, + }, + [BOARD_PCIDAS64_M1_16_JR] = { + .name = "pci-das64/m1/16/jr", + .ai_se_chans = 64, + .ai_bits = 16, + .ai_speed = 1000, + .ao_nchan = 0, + .ao_scan_speed = 10000, + .layout = LAYOUT_64XX, + .ai_range_table = &ai_ranges_64_mx, + .ai_range_code = ai_range_code_64_mx, + .ai_fifo = ai_fifo_64xx, + .has_8255 = 1, + }, + [BOARD_PCIDAS64_M2_16_JR] = { + .name = "pci-das64/m2/16/jr", + .ai_se_chans = 64, + .ai_bits = 16, + .ai_speed = 500, + .ao_nchan = 0, + .ao_scan_speed = 10000, + .layout = LAYOUT_64XX, + .ai_range_table = &ai_ranges_64_mx, + .ai_range_code = ai_range_code_64_mx, + .ai_fifo = ai_fifo_64xx, + .has_8255 = 1, + }, + [BOARD_PCIDAS64_M3_16_JR] = { + .name = "pci-das64/m3/16/jr", + .ai_se_chans = 64, + .ai_bits = 16, + .ai_speed = 333, + .ao_nchan = 0, + .ao_scan_speed = 10000, + .layout = LAYOUT_64XX, + .ai_range_table = &ai_ranges_64_mx, + .ai_range_code = ai_range_code_64_mx, + .ai_fifo = ai_fifo_64xx, + .has_8255 = 1, + }, + [BOARD_PCIDAS64_M1_14] = { + .name = "pci-das64/m1/14", + .ai_se_chans = 64, + .ai_bits = 14, + .ai_speed = 1000, + .ao_nchan = 2, + .ao_scan_speed = 10000, + .layout = LAYOUT_64XX, + .ai_range_table = &ai_ranges_64_mx, + .ai_range_code = ai_range_code_64_mx, + .ai_fifo = ai_fifo_64xx, + .has_8255 = 1, + }, + [BOARD_PCIDAS64_M2_14] = { + .name = "pci-das64/m2/14", + .ai_se_chans = 64, + .ai_bits = 14, + .ai_speed = 500, + .ao_nchan = 2, + .ao_scan_speed = 10000, + .layout = LAYOUT_64XX, + .ai_range_table = &ai_ranges_64_mx, + .ai_range_code = ai_range_code_64_mx, + .ai_fifo = ai_fifo_64xx, + .has_8255 = 1, + }, + [BOARD_PCIDAS64_M3_14] = { + .name = "pci-das64/m3/14", + .ai_se_chans = 64, + .ai_bits = 14, + .ai_speed = 333, + .ao_nchan = 2, + .ao_scan_speed = 10000, + .layout = LAYOUT_64XX, + .ai_range_table = &ai_ranges_64_mx, + .ai_range_code = ai_range_code_64_mx, + .ai_fifo = ai_fifo_64xx, + .has_8255 = 1, + }, +#endif +}; + +static inline unsigned short se_diff_bit_6xxx(struct comedi_device *dev, + int use_differential) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + + if ((thisboard->layout == LAYOUT_64XX && !use_differential) || + (thisboard->layout == LAYOUT_60XX && use_differential)) + return ADC_SE_DIFF_BIT; + + return 0; +} + +struct ext_clock_info { + /* master clock divisor to use for scans with external master clock */ + unsigned int divisor; + /* chanspec for master clock input when used as scan begin src */ + unsigned int chanspec; +}; + +/* this structure is for data unique to this hardware driver. */ +struct pcidas64_private { + /* base addresses (physical) */ + resource_size_t main_phys_iobase; + resource_size_t dio_counter_phys_iobase; + /* base addresses (ioremapped) */ + void __iomem *plx9080_iobase; + void __iomem *main_iobase; + /* local address (used by dma controller) */ + uint32_t local0_iobase; + uint32_t local1_iobase; + /* dma buffers for analog input */ + uint16_t *ai_buffer[MAX_AI_DMA_RING_COUNT]; + /* physical addresses of ai dma buffers */ + dma_addr_t ai_buffer_bus_addr[MAX_AI_DMA_RING_COUNT]; + /* array of ai dma descriptors read by plx9080, + * allocated to get proper alignment */ + struct plx_dma_desc *ai_dma_desc; + /* physical address of ai dma descriptor array */ + dma_addr_t ai_dma_desc_bus_addr; + /* index of the ai dma descriptor/buffer + * that is currently being used */ + unsigned int ai_dma_index; + /* dma buffers for analog output */ + uint16_t *ao_buffer[AO_DMA_RING_COUNT]; + /* physical addresses of ao dma buffers */ + dma_addr_t ao_buffer_bus_addr[AO_DMA_RING_COUNT]; + struct plx_dma_desc *ao_dma_desc; + dma_addr_t ao_dma_desc_bus_addr; + /* keeps track of buffer where the next ao sample should go */ + unsigned int ao_dma_index; + unsigned int hw_revision; /* stc chip hardware revision number */ + /* last bits sent to INTR_ENABLE_REG register */ + unsigned int intr_enable_bits; + /* last bits sent to ADC_CONTROL1_REG register */ + uint16_t adc_control1_bits; + /* last bits sent to FIFO_SIZE_REG register */ + uint16_t fifo_size_bits; + /* last bits sent to HW_CONFIG_REG register */ + uint16_t hw_config_bits; + uint16_t dac_control1_bits; + /* last bits written to plx9080 control register */ + uint32_t plx_control_bits; + /* last bits written to plx interrupt control and status register */ + uint32_t plx_intcsr_bits; + /* index of calibration source readable through ai ch0 */ + int calibration_source; + /* bits written to i2c calibration/range register */ + uint8_t i2c_cal_range_bits; + /* configure digital triggers to trigger on falling edge */ + unsigned int ext_trig_falling; + short ai_cmd_running; + unsigned int ai_fifo_segment_length; + struct ext_clock_info ext_clock; + unsigned short ao_bounce_buffer[DAC_FIFO_SIZE]; +}; + +static unsigned int ai_range_bits_6xxx(const struct comedi_device *dev, + unsigned int range_index) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + + return thisboard->ai_range_code[range_index] << 8; +} + +static unsigned int hw_revision(const struct comedi_device *dev, + uint16_t hw_status_bits) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + + if (thisboard->layout == LAYOUT_4020) + return (hw_status_bits >> 13) & 0x7; + + return (hw_status_bits >> 12) & 0xf; +} + +static void set_dac_range_bits(struct comedi_device *dev, + uint16_t *bits, unsigned int channel, + unsigned int range) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + unsigned int code = thisboard->ao_range_code[range]; + + if (channel > 1) + dev_err(dev->class_dev, "bug! bad channel?\n"); + if (code & ~0x3) + dev_err(dev->class_dev, "bug! bad range code?\n"); + + *bits &= ~(0x3 << (2 * channel)); + *bits |= code << (2 * channel); +}; + +static inline int ao_cmd_is_supported(const struct pcidas64_board *board) +{ + return board->ao_nchan && board->layout != LAYOUT_4020; +} + +static void abort_dma(struct comedi_device *dev, unsigned int channel) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned long flags; + + /* spinlock for plx dma control/status reg */ + spin_lock_irqsave(&dev->spinlock, flags); + + plx9080_abort_dma(devpriv->plx9080_iobase, channel); + + spin_unlock_irqrestore(&dev->spinlock, flags); +} + +static void disable_plx_interrupts(struct comedi_device *dev) +{ + struct pcidas64_private *devpriv = dev->private; + + devpriv->plx_intcsr_bits = 0; + writel(devpriv->plx_intcsr_bits, + devpriv->plx9080_iobase + PLX_INTRCS_REG); +} + +static void disable_ai_interrupts(struct comedi_device *dev) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned long flags; + + spin_lock_irqsave(&dev->spinlock, flags); + devpriv->intr_enable_bits &= + ~EN_ADC_INTR_SRC_BIT & ~EN_ADC_DONE_INTR_BIT & + ~EN_ADC_ACTIVE_INTR_BIT & ~EN_ADC_STOP_INTR_BIT & + ~EN_ADC_OVERRUN_BIT & ~ADC_INTR_SRC_MASK; + writew(devpriv->intr_enable_bits, + devpriv->main_iobase + INTR_ENABLE_REG); + spin_unlock_irqrestore(&dev->spinlock, flags); +} + +static void enable_ai_interrupts(struct comedi_device *dev, + const struct comedi_cmd *cmd) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + uint32_t bits; + unsigned long flags; + + bits = EN_ADC_OVERRUN_BIT | EN_ADC_DONE_INTR_BIT | + EN_ADC_ACTIVE_INTR_BIT | EN_ADC_STOP_INTR_BIT; + /* Use pio transfer and interrupt on end of conversion + * if CMDF_WAKE_EOS flag is set. */ + if (cmd->flags & CMDF_WAKE_EOS) { + /* 4020 doesn't support pio transfers except for fifo dregs */ + if (thisboard->layout != LAYOUT_4020) + bits |= ADC_INTR_EOSCAN_BITS | EN_ADC_INTR_SRC_BIT; + } + spin_lock_irqsave(&dev->spinlock, flags); + devpriv->intr_enable_bits |= bits; + writew(devpriv->intr_enable_bits, + devpriv->main_iobase + INTR_ENABLE_REG); + spin_unlock_irqrestore(&dev->spinlock, flags); +} + +/* initialize plx9080 chip */ +static void init_plx9080(struct comedi_device *dev) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + uint32_t bits; + void __iomem *plx_iobase = devpriv->plx9080_iobase; + + devpriv->plx_control_bits = + readl(devpriv->plx9080_iobase + PLX_CONTROL_REG); + +#ifdef __BIG_ENDIAN + bits = BIGEND_DMA0 | BIGEND_DMA1; +#else + bits = 0; +#endif + writel(bits, devpriv->plx9080_iobase + PLX_BIGEND_REG); + + disable_plx_interrupts(dev); + + abort_dma(dev, 0); + abort_dma(dev, 1); + + /* configure dma0 mode */ + bits = 0; + /* enable ready input, not sure if this is necessary */ + bits |= PLX_DMA_EN_READYIN_BIT; + /* enable bterm, not sure if this is necessary */ + bits |= PLX_EN_BTERM_BIT; + /* enable dma chaining */ + bits |= PLX_EN_CHAIN_BIT; + /* enable interrupt on dma done + * (probably don't need this, since chain never finishes) */ + bits |= PLX_EN_DMA_DONE_INTR_BIT; + /* don't increment local address during transfers + * (we are transferring from a fixed fifo register) */ + bits |= PLX_LOCAL_ADDR_CONST_BIT; + /* route dma interrupt to pci bus */ + bits |= PLX_DMA_INTR_PCI_BIT; + /* enable demand mode */ + bits |= PLX_DEMAND_MODE_BIT; + /* enable local burst mode */ + bits |= PLX_DMA_LOCAL_BURST_EN_BIT; + /* 4020 uses 32 bit dma */ + if (thisboard->layout == LAYOUT_4020) + bits |= PLX_LOCAL_BUS_32_WIDE_BITS; + else /* localspace0 bus is 16 bits wide */ + bits |= PLX_LOCAL_BUS_16_WIDE_BITS; + writel(bits, plx_iobase + PLX_DMA1_MODE_REG); + if (ao_cmd_is_supported(thisboard)) + writel(bits, plx_iobase + PLX_DMA0_MODE_REG); + + /* enable interrupts on plx 9080 */ + devpriv->plx_intcsr_bits |= + ICS_AERR | ICS_PERR | ICS_PIE | ICS_PLIE | ICS_PAIE | ICS_LIE | + ICS_DMA0_E | ICS_DMA1_E; + writel(devpriv->plx_intcsr_bits, + devpriv->plx9080_iobase + PLX_INTRCS_REG); +} + +static void disable_ai_pacing(struct comedi_device *dev) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned long flags; + + disable_ai_interrupts(dev); + + spin_lock_irqsave(&dev->spinlock, flags); + devpriv->adc_control1_bits &= ~ADC_SW_GATE_BIT; + writew(devpriv->adc_control1_bits, + devpriv->main_iobase + ADC_CONTROL1_REG); + spin_unlock_irqrestore(&dev->spinlock, flags); + + /* disable pacing, triggering, etc */ + writew(ADC_DMA_DISABLE_BIT | ADC_SOFT_GATE_BITS | ADC_GATE_LEVEL_BIT, + devpriv->main_iobase + ADC_CONTROL0_REG); +} + +static int set_ai_fifo_segment_length(struct comedi_device *dev, + unsigned int num_entries) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + static const int increment_size = 0x100; + const struct hw_fifo_info *const fifo = thisboard->ai_fifo; + unsigned int num_increments; + uint16_t bits; + + if (num_entries < increment_size) + num_entries = increment_size; + if (num_entries > fifo->max_segment_length) + num_entries = fifo->max_segment_length; + + /* 1 == 256 entries, 2 == 512 entries, etc */ + num_increments = (num_entries + increment_size / 2) / increment_size; + + bits = (~(num_increments - 1)) & fifo->fifo_size_reg_mask; + devpriv->fifo_size_bits &= ~fifo->fifo_size_reg_mask; + devpriv->fifo_size_bits |= bits; + writew(devpriv->fifo_size_bits, + devpriv->main_iobase + FIFO_SIZE_REG); + + devpriv->ai_fifo_segment_length = num_increments * increment_size; + + return devpriv->ai_fifo_segment_length; +} + +/* adjusts the size of hardware fifo (which determines block size for dma xfers) */ +static int set_ai_fifo_size(struct comedi_device *dev, unsigned int num_samples) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + unsigned int num_fifo_entries; + int retval; + const struct hw_fifo_info *const fifo = thisboard->ai_fifo; + + num_fifo_entries = num_samples / fifo->sample_packing_ratio; + + retval = set_ai_fifo_segment_length(dev, + num_fifo_entries / + fifo->num_segments); + if (retval < 0) + return retval; + + num_samples = retval * fifo->num_segments * fifo->sample_packing_ratio; + + return num_samples; +} + +/* query length of fifo */ +static unsigned int ai_fifo_size(struct comedi_device *dev) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + + return devpriv->ai_fifo_segment_length * + thisboard->ai_fifo->num_segments * + thisboard->ai_fifo->sample_packing_ratio; +} + +static void init_stc_registers(struct comedi_device *dev) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + uint16_t bits; + unsigned long flags; + + spin_lock_irqsave(&dev->spinlock, flags); + + /* bit should be set for 6025, + * although docs say boards with <= 16 chans should be cleared XXX */ + if (1) + devpriv->adc_control1_bits |= ADC_QUEUE_CONFIG_BIT; + writew(devpriv->adc_control1_bits, + devpriv->main_iobase + ADC_CONTROL1_REG); + + /* 6402/16 manual says this register must be initialized to 0xff? */ + writew(0xff, devpriv->main_iobase + ADC_SAMPLE_INTERVAL_UPPER_REG); + + bits = SLOW_DAC_BIT | DMA_CH_SELECT_BIT; + if (thisboard->layout == LAYOUT_4020) + bits |= INTERNAL_CLOCK_4020_BITS; + devpriv->hw_config_bits |= bits; + writew(devpriv->hw_config_bits, + devpriv->main_iobase + HW_CONFIG_REG); + + writew(0, devpriv->main_iobase + DAQ_SYNC_REG); + writew(0, devpriv->main_iobase + CALIBRATION_REG); + + spin_unlock_irqrestore(&dev->spinlock, flags); + + /* set fifos to maximum size */ + devpriv->fifo_size_bits |= DAC_FIFO_BITS; + set_ai_fifo_segment_length(dev, + thisboard->ai_fifo->max_segment_length); + + devpriv->dac_control1_bits = DAC_OUTPUT_ENABLE_BIT; + devpriv->intr_enable_bits = + /* EN_DAC_INTR_SRC_BIT | DAC_INTR_QEMPTY_BITS | */ + EN_DAC_DONE_INTR_BIT | EN_DAC_UNDERRUN_BIT; + writew(devpriv->intr_enable_bits, + devpriv->main_iobase + INTR_ENABLE_REG); + + disable_ai_pacing(dev); +}; + +static int alloc_and_init_dma_members(struct comedi_device *dev) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pci_dev *pcidev = comedi_to_pci_dev(dev); + struct pcidas64_private *devpriv = dev->private; + int i; + + /* allocate pci dma buffers */ + for (i = 0; i < ai_dma_ring_count(thisboard); i++) { + devpriv->ai_buffer[i] = + pci_alloc_consistent(pcidev, DMA_BUFFER_SIZE, + &devpriv->ai_buffer_bus_addr[i]); + if (!devpriv->ai_buffer[i]) + return -ENOMEM; + } + for (i = 0; i < AO_DMA_RING_COUNT; i++) { + if (ao_cmd_is_supported(thisboard)) { + devpriv->ao_buffer[i] = + pci_alloc_consistent(pcidev, DMA_BUFFER_SIZE, + &devpriv-> + ao_buffer_bus_addr[i]); + if (!devpriv->ao_buffer[i]) + return -ENOMEM; + } + } + /* allocate dma descriptors */ + devpriv->ai_dma_desc = + pci_alloc_consistent(pcidev, sizeof(struct plx_dma_desc) * + ai_dma_ring_count(thisboard), + &devpriv->ai_dma_desc_bus_addr); + if (!devpriv->ai_dma_desc) + return -ENOMEM; + + if (ao_cmd_is_supported(thisboard)) { + devpriv->ao_dma_desc = + pci_alloc_consistent(pcidev, + sizeof(struct plx_dma_desc) * + AO_DMA_RING_COUNT, + &devpriv->ao_dma_desc_bus_addr); + if (!devpriv->ao_dma_desc) + return -ENOMEM; + } + /* initialize dma descriptors */ + for (i = 0; i < ai_dma_ring_count(thisboard); i++) { + devpriv->ai_dma_desc[i].pci_start_addr = + cpu_to_le32(devpriv->ai_buffer_bus_addr[i]); + if (thisboard->layout == LAYOUT_4020) + devpriv->ai_dma_desc[i].local_start_addr = + cpu_to_le32(devpriv->local1_iobase + + ADC_FIFO_REG); + else + devpriv->ai_dma_desc[i].local_start_addr = + cpu_to_le32(devpriv->local0_iobase + + ADC_FIFO_REG); + devpriv->ai_dma_desc[i].transfer_size = cpu_to_le32(0); + devpriv->ai_dma_desc[i].next = + cpu_to_le32((devpriv->ai_dma_desc_bus_addr + + ((i + 1) % ai_dma_ring_count(thisboard)) * + sizeof(devpriv->ai_dma_desc[0])) | + PLX_DESC_IN_PCI_BIT | PLX_INTR_TERM_COUNT | + PLX_XFER_LOCAL_TO_PCI); + } + if (ao_cmd_is_supported(thisboard)) { + for (i = 0; i < AO_DMA_RING_COUNT; i++) { + devpriv->ao_dma_desc[i].pci_start_addr = + cpu_to_le32(devpriv->ao_buffer_bus_addr[i]); + devpriv->ao_dma_desc[i].local_start_addr = + cpu_to_le32(devpriv->local0_iobase + + DAC_FIFO_REG); + devpriv->ao_dma_desc[i].transfer_size = cpu_to_le32(0); + devpriv->ao_dma_desc[i].next = + cpu_to_le32((devpriv->ao_dma_desc_bus_addr + + ((i + 1) % (AO_DMA_RING_COUNT)) * + sizeof(devpriv->ao_dma_desc[0])) | + PLX_DESC_IN_PCI_BIT | + PLX_INTR_TERM_COUNT); + } + } + return 0; +} + +static void cb_pcidas64_free_dma(struct comedi_device *dev) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pci_dev *pcidev = comedi_to_pci_dev(dev); + struct pcidas64_private *devpriv = dev->private; + int i; + + if (!devpriv) + return; + + /* free pci dma buffers */ + for (i = 0; i < ai_dma_ring_count(thisboard); i++) { + if (devpriv->ai_buffer[i]) + pci_free_consistent(pcidev, + DMA_BUFFER_SIZE, + devpriv->ai_buffer[i], + devpriv->ai_buffer_bus_addr[i]); + } + for (i = 0; i < AO_DMA_RING_COUNT; i++) { + if (devpriv->ao_buffer[i]) + pci_free_consistent(pcidev, + DMA_BUFFER_SIZE, + devpriv->ao_buffer[i], + devpriv->ao_buffer_bus_addr[i]); + } + /* free dma descriptors */ + if (devpriv->ai_dma_desc) + pci_free_consistent(pcidev, + sizeof(struct plx_dma_desc) * + ai_dma_ring_count(thisboard), + devpriv->ai_dma_desc, + devpriv->ai_dma_desc_bus_addr); + if (devpriv->ao_dma_desc) + pci_free_consistent(pcidev, + sizeof(struct plx_dma_desc) * + AO_DMA_RING_COUNT, + devpriv->ao_dma_desc, + devpriv->ao_dma_desc_bus_addr); +} + +static inline void warn_external_queue(struct comedi_device *dev) +{ + dev_err(dev->class_dev, + "AO command and AI external channel queue cannot be used simultaneously\n"); + dev_err(dev->class_dev, + "Use internal AI channel queue (channels must be consecutive and use same range/aref)\n"); +} + +/* Their i2c requires a huge delay on setting clock or data high for some reason */ +static const int i2c_high_udelay = 1000; +static const int i2c_low_udelay = 10; + +/* set i2c data line high or low */ +static void i2c_set_sda(struct comedi_device *dev, int state) +{ + struct pcidas64_private *devpriv = dev->private; + static const int data_bit = CTL_EE_W; + void __iomem *plx_control_addr = devpriv->plx9080_iobase + + PLX_CONTROL_REG; + + if (state) { + /* set data line high */ + devpriv->plx_control_bits &= ~data_bit; + writel(devpriv->plx_control_bits, plx_control_addr); + udelay(i2c_high_udelay); + } else { /* set data line low */ + + devpriv->plx_control_bits |= data_bit; + writel(devpriv->plx_control_bits, plx_control_addr); + udelay(i2c_low_udelay); + } +} + +/* set i2c clock line high or low */ +static void i2c_set_scl(struct comedi_device *dev, int state) +{ + struct pcidas64_private *devpriv = dev->private; + static const int clock_bit = CTL_USERO; + void __iomem *plx_control_addr = devpriv->plx9080_iobase + + PLX_CONTROL_REG; + + if (state) { + /* set clock line high */ + devpriv->plx_control_bits &= ~clock_bit; + writel(devpriv->plx_control_bits, plx_control_addr); + udelay(i2c_high_udelay); + } else { /* set clock line low */ + + devpriv->plx_control_bits |= clock_bit; + writel(devpriv->plx_control_bits, plx_control_addr); + udelay(i2c_low_udelay); + } +} + +static void i2c_write_byte(struct comedi_device *dev, uint8_t byte) +{ + uint8_t bit; + unsigned int num_bits = 8; + + for (bit = 1 << (num_bits - 1); bit; bit >>= 1) { + i2c_set_scl(dev, 0); + if ((byte & bit)) + i2c_set_sda(dev, 1); + else + i2c_set_sda(dev, 0); + i2c_set_scl(dev, 1); + } +} + +/* we can't really read the lines, so fake it */ +static int i2c_read_ack(struct comedi_device *dev) +{ + i2c_set_scl(dev, 0); + i2c_set_sda(dev, 1); + i2c_set_scl(dev, 1); + + return 0; /* return fake acknowledge bit */ +} + +/* send start bit */ +static void i2c_start(struct comedi_device *dev) +{ + i2c_set_scl(dev, 1); + i2c_set_sda(dev, 1); + i2c_set_sda(dev, 0); +} + +/* send stop bit */ +static void i2c_stop(struct comedi_device *dev) +{ + i2c_set_scl(dev, 0); + i2c_set_sda(dev, 0); + i2c_set_scl(dev, 1); + i2c_set_sda(dev, 1); +} + +static void i2c_write(struct comedi_device *dev, unsigned int address, + const uint8_t *data, unsigned int length) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned int i; + uint8_t bitstream; + static const int read_bit = 0x1; + + /* XXX need mutex to prevent simultaneous attempts to access + * eeprom and i2c bus */ + + /* make sure we dont send anything to eeprom */ + devpriv->plx_control_bits &= ~CTL_EE_CS; + + i2c_stop(dev); + i2c_start(dev); + + /* send address and write bit */ + bitstream = (address << 1) & ~read_bit; + i2c_write_byte(dev, bitstream); + + /* get acknowledge */ + if (i2c_read_ack(dev) != 0) { + dev_err(dev->class_dev, "failed: no acknowledge\n"); + i2c_stop(dev); + return; + } + /* write data bytes */ + for (i = 0; i < length; i++) { + i2c_write_byte(dev, data[i]); + if (i2c_read_ack(dev) != 0) { + dev_err(dev->class_dev, "failed: no acknowledge\n"); + i2c_stop(dev); + return; + } + } + i2c_stop(dev); +} + +static int cb_pcidas64_ai_eoc(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned long context) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + unsigned int status; + + status = readw(devpriv->main_iobase + HW_STATUS_REG); + if (thisboard->layout == LAYOUT_4020) { + status = readw(devpriv->main_iobase + ADC_WRITE_PNTR_REG); + if (status) + return 0; + } else { + if (pipe_full_bits(status)) + return 0; + } + return -EBUSY; +} + +static int ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, + struct comedi_insn *insn, unsigned int *data) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + unsigned int bits = 0, n; + unsigned int channel, range, aref; + unsigned long flags; + int ret; + + channel = CR_CHAN(insn->chanspec); + range = CR_RANGE(insn->chanspec); + aref = CR_AREF(insn->chanspec); + + /* disable card's analog input interrupt sources and pacing */ + /* 4020 generates dac done interrupts even though they are disabled */ + disable_ai_pacing(dev); + + spin_lock_irqsave(&dev->spinlock, flags); + if (insn->chanspec & CR_ALT_FILTER) + devpriv->adc_control1_bits |= ADC_DITHER_BIT; + else + devpriv->adc_control1_bits &= ~ADC_DITHER_BIT; + writew(devpriv->adc_control1_bits, + devpriv->main_iobase + ADC_CONTROL1_REG); + spin_unlock_irqrestore(&dev->spinlock, flags); + + if (thisboard->layout != LAYOUT_4020) { + /* use internal queue */ + devpriv->hw_config_bits &= ~EXT_QUEUE_BIT; + writew(devpriv->hw_config_bits, + devpriv->main_iobase + HW_CONFIG_REG); + + /* ALT_SOURCE is internal calibration reference */ + if (insn->chanspec & CR_ALT_SOURCE) { + unsigned int cal_en_bit; + + if (thisboard->layout == LAYOUT_60XX) + cal_en_bit = CAL_EN_60XX_BIT; + else + cal_en_bit = CAL_EN_64XX_BIT; + /* select internal reference source to connect + * to channel 0 */ + writew(cal_en_bit | + adc_src_bits(devpriv->calibration_source), + devpriv->main_iobase + CALIBRATION_REG); + } else { + /* make sure internal calibration source + * is turned off */ + writew(0, devpriv->main_iobase + CALIBRATION_REG); + } + /* load internal queue */ + bits = 0; + /* set gain */ + bits |= ai_range_bits_6xxx(dev, CR_RANGE(insn->chanspec)); + /* set single-ended / differential */ + bits |= se_diff_bit_6xxx(dev, aref == AREF_DIFF); + if (aref == AREF_COMMON) + bits |= ADC_COMMON_BIT; + bits |= adc_chan_bits(channel); + /* set stop channel */ + writew(adc_chan_bits(channel), + devpriv->main_iobase + ADC_QUEUE_HIGH_REG); + /* set start channel, and rest of settings */ + writew(bits, devpriv->main_iobase + ADC_QUEUE_LOAD_REG); + } else { + uint8_t old_cal_range_bits = devpriv->i2c_cal_range_bits; + + devpriv->i2c_cal_range_bits &= ~ADC_SRC_4020_MASK; + if (insn->chanspec & CR_ALT_SOURCE) { + devpriv->i2c_cal_range_bits |= + adc_src_4020_bits(devpriv->calibration_source); + } else { /* select BNC inputs */ + devpriv->i2c_cal_range_bits |= adc_src_4020_bits(4); + } + /* select range */ + if (range == 0) + devpriv->i2c_cal_range_bits |= attenuate_bit(channel); + else + devpriv->i2c_cal_range_bits &= ~attenuate_bit(channel); + /* update calibration/range i2c register only if necessary, + * as it is very slow */ + if (old_cal_range_bits != devpriv->i2c_cal_range_bits) { + uint8_t i2c_data = devpriv->i2c_cal_range_bits; + + i2c_write(dev, RANGE_CAL_I2C_ADDR, &i2c_data, + sizeof(i2c_data)); + } + + /* 4020 manual asks that sample interval register to be set + * before writing to convert register. + * Using somewhat arbitrary setting of 4 master clock ticks + * = 0.1 usec */ + writew(0, devpriv->main_iobase + ADC_SAMPLE_INTERVAL_UPPER_REG); + writew(2, devpriv->main_iobase + ADC_SAMPLE_INTERVAL_LOWER_REG); + } + + for (n = 0; n < insn->n; n++) { + /* clear adc buffer (inside loop for 4020 sake) */ + writew(0, devpriv->main_iobase + ADC_BUFFER_CLEAR_REG); + + /* trigger conversion, bits sent only matter for 4020 */ + writew(adc_convert_chan_4020_bits(CR_CHAN(insn->chanspec)), + devpriv->main_iobase + ADC_CONVERT_REG); + + /* wait for data */ + ret = comedi_timeout(dev, s, insn, cb_pcidas64_ai_eoc, 0); + if (ret) + return ret; + + if (thisboard->layout == LAYOUT_4020) + data[n] = readl(dev->mmio + ADC_FIFO_REG) & 0xffff; + else + data[n] = readw(devpriv->main_iobase + PIPE1_READ_REG); + } + + return n; +} + +static int ai_config_calibration_source(struct comedi_device *dev, + unsigned int *data) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + unsigned int source = data[1]; + int num_calibration_sources; + + if (thisboard->layout == LAYOUT_60XX) + num_calibration_sources = 16; + else + num_calibration_sources = 8; + if (source >= num_calibration_sources) { + dev_dbg(dev->class_dev, "invalid calibration source: %i\n", + source); + return -EINVAL; + } + + devpriv->calibration_source = source; + + return 2; +} + +static int ai_config_block_size(struct comedi_device *dev, unsigned int *data) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + int fifo_size; + const struct hw_fifo_info *const fifo = thisboard->ai_fifo; + unsigned int block_size, requested_block_size; + int retval; + + requested_block_size = data[1]; + + if (requested_block_size) { + fifo_size = requested_block_size * fifo->num_segments / + bytes_in_sample; + + retval = set_ai_fifo_size(dev, fifo_size); + if (retval < 0) + return retval; + } + + block_size = ai_fifo_size(dev) / fifo->num_segments * bytes_in_sample; + + data[1] = block_size; + + return 2; +} + +static int ai_config_master_clock_4020(struct comedi_device *dev, + unsigned int *data) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned int divisor = data[4]; + int retval = 0; + + if (divisor < 2) { + divisor = 2; + retval = -EAGAIN; + } + + switch (data[1]) { + case COMEDI_EV_SCAN_BEGIN: + devpriv->ext_clock.divisor = divisor; + devpriv->ext_clock.chanspec = data[2]; + break; + default: + return -EINVAL; + } + + data[4] = divisor; + + return retval ? retval : 5; +} + +/* XXX could add support for 60xx series */ +static int ai_config_master_clock(struct comedi_device *dev, unsigned int *data) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + + switch (thisboard->layout) { + case LAYOUT_4020: + return ai_config_master_clock_4020(dev, data); + default: + return -EINVAL; + } + + return -EINVAL; +} + +static int ai_config_insn(struct comedi_device *dev, struct comedi_subdevice *s, + struct comedi_insn *insn, unsigned int *data) +{ + int id = data[0]; + + switch (id) { + case INSN_CONFIG_ALT_SOURCE: + return ai_config_calibration_source(dev, data); + case INSN_CONFIG_BLOCK_SIZE: + return ai_config_block_size(dev, data); + case INSN_CONFIG_TIMER_1: + return ai_config_master_clock(dev, data); + default: + return -EINVAL; + } + return -EINVAL; +} + +/* Gets nearest achievable timing given master clock speed, does not + * take into account possible minimum/maximum divisor values. Used + * by other timing checking functions. */ +static unsigned int get_divisor(unsigned int ns, unsigned int flags) +{ + unsigned int divisor; + + switch (flags & CMDF_ROUND_MASK) { + case CMDF_ROUND_UP: + divisor = (ns + TIMER_BASE - 1) / TIMER_BASE; + break; + case CMDF_ROUND_DOWN: + divisor = ns / TIMER_BASE; + break; + case CMDF_ROUND_NEAREST: + default: + divisor = (ns + TIMER_BASE / 2) / TIMER_BASE; + break; + } + return divisor; +} + +/* utility function that rounds desired timing to an achievable time, and + * sets cmd members appropriately. + * adc paces conversions from master clock by dividing by (x + 3) where x is 24 bit number + */ +static void check_adc_timing(struct comedi_device *dev, struct comedi_cmd *cmd) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + unsigned long long convert_divisor = 0; + unsigned int scan_divisor; + static const int min_convert_divisor = 3; + static const int max_convert_divisor = + max_counter_value + min_convert_divisor; + static const int min_scan_divisor_4020 = 2; + unsigned long long max_scan_divisor, min_scan_divisor; + + if (cmd->convert_src == TRIG_TIMER) { + if (thisboard->layout == LAYOUT_4020) { + cmd->convert_arg = 0; + } else { + convert_divisor = get_divisor(cmd->convert_arg, + cmd->flags); + if (convert_divisor > max_convert_divisor) + convert_divisor = max_convert_divisor; + if (convert_divisor < min_convert_divisor) + convert_divisor = min_convert_divisor; + cmd->convert_arg = convert_divisor * TIMER_BASE; + } + } else if (cmd->convert_src == TRIG_NOW) { + cmd->convert_arg = 0; + } + + if (cmd->scan_begin_src == TRIG_TIMER) { + scan_divisor = get_divisor(cmd->scan_begin_arg, cmd->flags); + if (cmd->convert_src == TRIG_TIMER) { + min_scan_divisor = convert_divisor * cmd->chanlist_len; + max_scan_divisor = + (convert_divisor * cmd->chanlist_len - 1) + + max_counter_value; + } else { + min_scan_divisor = min_scan_divisor_4020; + max_scan_divisor = max_counter_value + min_scan_divisor; + } + if (scan_divisor > max_scan_divisor) + scan_divisor = max_scan_divisor; + if (scan_divisor < min_scan_divisor) + scan_divisor = min_scan_divisor; + cmd->scan_begin_arg = scan_divisor * TIMER_BASE; + } +} + +static int cb_pcidas64_ai_check_chanlist(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_cmd *cmd) +{ + const struct pcidas64_board *board = dev->board_ptr; + unsigned int aref0 = CR_AREF(cmd->chanlist[0]); + int i; + + for (i = 1; i < cmd->chanlist_len; i++) { + unsigned int aref = CR_AREF(cmd->chanlist[i]); + + if (aref != aref0) { + dev_dbg(dev->class_dev, + "all elements in chanlist must use the same analog reference\n"); + return -EINVAL; + } + } + + if (board->layout == LAYOUT_4020) { + unsigned int chan0 = CR_CHAN(cmd->chanlist[0]); + + for (i = 1; i < cmd->chanlist_len; i++) { + unsigned int chan = CR_CHAN(cmd->chanlist[i]); + + if (chan != (chan0 + i)) { + dev_dbg(dev->class_dev, + "chanlist must use consecutive channels\n"); + return -EINVAL; + } + } + if (cmd->chanlist_len == 3) { + dev_dbg(dev->class_dev, + "chanlist cannot be 3 channels long, use 1, 2, or 4 channels\n"); + return -EINVAL; + } + } + + return 0; +} + +static int ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, + struct comedi_cmd *cmd) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + int err = 0; + unsigned int tmp_arg, tmp_arg2; + unsigned int triggers; + + /* Step 1 : check if triggers are trivially valid */ + + err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_EXT); + + triggers = TRIG_TIMER; + if (thisboard->layout == LAYOUT_4020) + triggers |= TRIG_OTHER; + else + triggers |= TRIG_FOLLOW; + err |= comedi_check_trigger_src(&cmd->scan_begin_src, triggers); + + triggers = TRIG_TIMER; + if (thisboard->layout == LAYOUT_4020) + triggers |= TRIG_NOW; + else + triggers |= TRIG_EXT; + err |= comedi_check_trigger_src(&cmd->convert_src, triggers); + err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT); + err |= comedi_check_trigger_src(&cmd->stop_src, + TRIG_COUNT | TRIG_EXT | TRIG_NONE); + + if (err) + return 1; + + /* Step 2a : make sure trigger sources are unique */ + + err |= comedi_check_trigger_is_unique(cmd->start_src); + err |= comedi_check_trigger_is_unique(cmd->scan_begin_src); + err |= comedi_check_trigger_is_unique(cmd->convert_src); + err |= comedi_check_trigger_is_unique(cmd->stop_src); + + /* Step 2b : and mutually compatible */ + + if (cmd->convert_src == TRIG_EXT && cmd->scan_begin_src == TRIG_TIMER) + err |= -EINVAL; + + if (err) + return 2; + + /* Step 3: check if arguments are trivially valid */ + + switch (cmd->start_src) { + case TRIG_NOW: + err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0); + break; + case TRIG_EXT: + /* + * start_arg is the CR_CHAN | CR_INVERT of the + * external trigger. + */ + break; + } + + if (cmd->convert_src == TRIG_TIMER) { + if (thisboard->layout == LAYOUT_4020) { + err |= comedi_check_trigger_arg_is(&cmd->convert_arg, + 0); + } else { + err |= comedi_check_trigger_arg_min(&cmd->convert_arg, + thisboard-> + ai_speed); + /* + * if scans are timed faster than conversion rate + * allows + */ + if (cmd->scan_begin_src == TRIG_TIMER) { + err |= comedi_check_trigger_arg_min( + &cmd->scan_begin_arg, + cmd->convert_arg * + cmd->chanlist_len); + } + } + } + + err |= comedi_check_trigger_arg_min(&cmd->chanlist_len, 1); + err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, + cmd->chanlist_len); + + switch (cmd->stop_src) { + case TRIG_EXT: + break; + case TRIG_COUNT: + err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1); + break; + case TRIG_NONE: + err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); + break; + default: + break; + } + + if (err) + return 3; + + /* step 4: fix up any arguments */ + + if (cmd->convert_src == TRIG_TIMER) { + tmp_arg = cmd->convert_arg; + tmp_arg2 = cmd->scan_begin_arg; + check_adc_timing(dev, cmd); + if (tmp_arg != cmd->convert_arg) + err++; + if (tmp_arg2 != cmd->scan_begin_arg) + err++; + } + + if (err) + return 4; + + /* Step 5: check channel list if it exists */ + if (cmd->chanlist && cmd->chanlist_len > 0) + err |= cb_pcidas64_ai_check_chanlist(dev, s, cmd); + + if (err) + return 5; + + return 0; +} + +static int use_hw_sample_counter(struct comedi_cmd *cmd) +{ +/* disable for now until I work out a race */ + return 0; + + if (cmd->stop_src == TRIG_COUNT && cmd->stop_arg <= max_counter_value) + return 1; + + return 0; +} + +static void setup_sample_counters(struct comedi_device *dev, + struct comedi_cmd *cmd) +{ + struct pcidas64_private *devpriv = dev->private; + + /* load hardware conversion counter */ + if (use_hw_sample_counter(cmd)) { + writew(cmd->stop_arg & 0xffff, + devpriv->main_iobase + ADC_COUNT_LOWER_REG); + writew((cmd->stop_arg >> 16) & 0xff, + devpriv->main_iobase + ADC_COUNT_UPPER_REG); + } else { + writew(1, devpriv->main_iobase + ADC_COUNT_LOWER_REG); + } +} + +static inline unsigned int dma_transfer_size(struct comedi_device *dev) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + unsigned int num_samples; + + num_samples = devpriv->ai_fifo_segment_length * + thisboard->ai_fifo->sample_packing_ratio; + if (num_samples > DMA_BUFFER_SIZE / sizeof(uint16_t)) + num_samples = DMA_BUFFER_SIZE / sizeof(uint16_t); + + return num_samples; +} + +static uint32_t ai_convert_counter_6xxx(const struct comedi_device *dev, + const struct comedi_cmd *cmd) +{ + /* supposed to load counter with desired divisor minus 3 */ + return cmd->convert_arg / TIMER_BASE - 3; +} + +static uint32_t ai_scan_counter_6xxx(struct comedi_device *dev, + struct comedi_cmd *cmd) +{ + uint32_t count; + + /* figure out how long we need to delay at end of scan */ + switch (cmd->scan_begin_src) { + case TRIG_TIMER: + count = (cmd->scan_begin_arg - + (cmd->convert_arg * (cmd->chanlist_len - 1))) / + TIMER_BASE; + break; + case TRIG_FOLLOW: + count = cmd->convert_arg / TIMER_BASE; + break; + default: + return 0; + } + return count - 3; +} + +static uint32_t ai_convert_counter_4020(struct comedi_device *dev, + struct comedi_cmd *cmd) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned int divisor; + + switch (cmd->scan_begin_src) { + case TRIG_TIMER: + divisor = cmd->scan_begin_arg / TIMER_BASE; + break; + case TRIG_OTHER: + divisor = devpriv->ext_clock.divisor; + break; + default: /* should never happen */ + dev_err(dev->class_dev, "bug! failed to set ai pacing!\n"); + divisor = 1000; + break; + } + + /* supposed to load counter with desired divisor minus 2 for 4020 */ + return divisor - 2; +} + +static void select_master_clock_4020(struct comedi_device *dev, + const struct comedi_cmd *cmd) +{ + struct pcidas64_private *devpriv = dev->private; + + /* select internal/external master clock */ + devpriv->hw_config_bits &= ~MASTER_CLOCK_4020_MASK; + if (cmd->scan_begin_src == TRIG_OTHER) { + int chanspec = devpriv->ext_clock.chanspec; + + if (CR_CHAN(chanspec)) + devpriv->hw_config_bits |= BNC_CLOCK_4020_BITS; + else + devpriv->hw_config_bits |= EXT_CLOCK_4020_BITS; + } else { + devpriv->hw_config_bits |= INTERNAL_CLOCK_4020_BITS; + } + writew(devpriv->hw_config_bits, + devpriv->main_iobase + HW_CONFIG_REG); +} + +static void select_master_clock(struct comedi_device *dev, + const struct comedi_cmd *cmd) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + + switch (thisboard->layout) { + case LAYOUT_4020: + select_master_clock_4020(dev, cmd); + break; + default: + break; + } +} + +static inline void dma_start_sync(struct comedi_device *dev, + unsigned int channel) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned long flags; + + /* spinlock for plx dma control/status reg */ + spin_lock_irqsave(&dev->spinlock, flags); + if (channel) + writeb(PLX_DMA_EN_BIT | PLX_DMA_START_BIT | + PLX_CLEAR_DMA_INTR_BIT, + devpriv->plx9080_iobase + PLX_DMA1_CS_REG); + else + writeb(PLX_DMA_EN_BIT | PLX_DMA_START_BIT | + PLX_CLEAR_DMA_INTR_BIT, + devpriv->plx9080_iobase + PLX_DMA0_CS_REG); + spin_unlock_irqrestore(&dev->spinlock, flags); +} + +static void set_ai_pacing(struct comedi_device *dev, struct comedi_cmd *cmd) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + uint32_t convert_counter = 0, scan_counter = 0; + + check_adc_timing(dev, cmd); + + select_master_clock(dev, cmd); + + if (thisboard->layout == LAYOUT_4020) { + convert_counter = ai_convert_counter_4020(dev, cmd); + } else { + convert_counter = ai_convert_counter_6xxx(dev, cmd); + scan_counter = ai_scan_counter_6xxx(dev, cmd); + } + + /* load lower 16 bits of convert interval */ + writew(convert_counter & 0xffff, + devpriv->main_iobase + ADC_SAMPLE_INTERVAL_LOWER_REG); + /* load upper 8 bits of convert interval */ + writew((convert_counter >> 16) & 0xff, + devpriv->main_iobase + ADC_SAMPLE_INTERVAL_UPPER_REG); + /* load lower 16 bits of scan delay */ + writew(scan_counter & 0xffff, + devpriv->main_iobase + ADC_DELAY_INTERVAL_LOWER_REG); + /* load upper 8 bits of scan delay */ + writew((scan_counter >> 16) & 0xff, + devpriv->main_iobase + ADC_DELAY_INTERVAL_UPPER_REG); +} + +static int use_internal_queue_6xxx(const struct comedi_cmd *cmd) +{ + int i; + + for (i = 0; i + 1 < cmd->chanlist_len; i++) { + if (CR_CHAN(cmd->chanlist[i + 1]) != + CR_CHAN(cmd->chanlist[i]) + 1) + return 0; + if (CR_RANGE(cmd->chanlist[i + 1]) != + CR_RANGE(cmd->chanlist[i])) + return 0; + if (CR_AREF(cmd->chanlist[i + 1]) != CR_AREF(cmd->chanlist[i])) + return 0; + } + return 1; +} + +static int setup_channel_queue(struct comedi_device *dev, + const struct comedi_cmd *cmd) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + unsigned short bits; + int i; + + if (thisboard->layout != LAYOUT_4020) { + if (use_internal_queue_6xxx(cmd)) { + devpriv->hw_config_bits &= ~EXT_QUEUE_BIT; + writew(devpriv->hw_config_bits, + devpriv->main_iobase + HW_CONFIG_REG); + bits = 0; + /* set channel */ + bits |= adc_chan_bits(CR_CHAN(cmd->chanlist[0])); + /* set gain */ + bits |= ai_range_bits_6xxx(dev, + CR_RANGE(cmd->chanlist[0])); + /* set single-ended / differential */ + bits |= se_diff_bit_6xxx(dev, + CR_AREF(cmd->chanlist[0]) == + AREF_DIFF); + if (CR_AREF(cmd->chanlist[0]) == AREF_COMMON) + bits |= ADC_COMMON_BIT; + /* set stop channel */ + writew(adc_chan_bits + (CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1])), + devpriv->main_iobase + ADC_QUEUE_HIGH_REG); + /* set start channel, and rest of settings */ + writew(bits, + devpriv->main_iobase + ADC_QUEUE_LOAD_REG); + } else { + /* use external queue */ + if (dev->write_subdev && dev->write_subdev->busy) { + warn_external_queue(dev); + return -EBUSY; + } + devpriv->hw_config_bits |= EXT_QUEUE_BIT; + writew(devpriv->hw_config_bits, + devpriv->main_iobase + HW_CONFIG_REG); + /* clear DAC buffer to prevent weird interactions */ + writew(0, + devpriv->main_iobase + DAC_BUFFER_CLEAR_REG); + /* clear queue pointer */ + writew(0, devpriv->main_iobase + ADC_QUEUE_CLEAR_REG); + /* load external queue */ + for (i = 0; i < cmd->chanlist_len; i++) { + bits = 0; + /* set channel */ + bits |= adc_chan_bits(CR_CHAN(cmd-> + chanlist[i])); + /* set gain */ + bits |= ai_range_bits_6xxx(dev, + CR_RANGE(cmd-> + chanlist + [i])); + /* set single-ended / differential */ + bits |= se_diff_bit_6xxx(dev, + CR_AREF(cmd-> + chanlist[i]) == + AREF_DIFF); + if (CR_AREF(cmd->chanlist[i]) == AREF_COMMON) + bits |= ADC_COMMON_BIT; + /* mark end of queue */ + if (i == cmd->chanlist_len - 1) + bits |= QUEUE_EOSCAN_BIT | + QUEUE_EOSEQ_BIT; + writew(bits, + devpriv->main_iobase + + ADC_QUEUE_FIFO_REG); + } + /* doing a queue clear is not specified in board docs, + * but required for reliable operation */ + writew(0, devpriv->main_iobase + ADC_QUEUE_CLEAR_REG); + /* prime queue holding register */ + writew(0, devpriv->main_iobase + ADC_QUEUE_LOAD_REG); + } + } else { + unsigned short old_cal_range_bits = devpriv->i2c_cal_range_bits; + + devpriv->i2c_cal_range_bits &= ~ADC_SRC_4020_MASK; + /* select BNC inputs */ + devpriv->i2c_cal_range_bits |= adc_src_4020_bits(4); + /* select ranges */ + for (i = 0; i < cmd->chanlist_len; i++) { + unsigned int channel = CR_CHAN(cmd->chanlist[i]); + unsigned int range = CR_RANGE(cmd->chanlist[i]); + + if (range == 0) + devpriv->i2c_cal_range_bits |= + attenuate_bit(channel); + else + devpriv->i2c_cal_range_bits &= + ~attenuate_bit(channel); + } + /* update calibration/range i2c register only if necessary, + * as it is very slow */ + if (old_cal_range_bits != devpriv->i2c_cal_range_bits) { + uint8_t i2c_data = devpriv->i2c_cal_range_bits; + + i2c_write(dev, RANGE_CAL_I2C_ADDR, &i2c_data, + sizeof(i2c_data)); + } + } + return 0; +} + +static inline void load_first_dma_descriptor(struct comedi_device *dev, + unsigned int dma_channel, + unsigned int descriptor_bits) +{ + struct pcidas64_private *devpriv = dev->private; + + /* The transfer size, pci address, and local address registers + * are supposedly unused during chained dma, + * but I have found that left over values from last operation + * occasionally cause problems with transfer of first dma + * block. Initializing them to zero seems to fix the problem. */ + if (dma_channel) { + writel(0, + devpriv->plx9080_iobase + PLX_DMA1_TRANSFER_SIZE_REG); + writel(0, devpriv->plx9080_iobase + PLX_DMA1_PCI_ADDRESS_REG); + writel(0, + devpriv->plx9080_iobase + PLX_DMA1_LOCAL_ADDRESS_REG); + writel(descriptor_bits, + devpriv->plx9080_iobase + PLX_DMA1_DESCRIPTOR_REG); + } else { + writel(0, + devpriv->plx9080_iobase + PLX_DMA0_TRANSFER_SIZE_REG); + writel(0, devpriv->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG); + writel(0, + devpriv->plx9080_iobase + PLX_DMA0_LOCAL_ADDRESS_REG); + writel(descriptor_bits, + devpriv->plx9080_iobase + PLX_DMA0_DESCRIPTOR_REG); + } +} + +static int ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + struct comedi_async *async = s->async; + struct comedi_cmd *cmd = &async->cmd; + uint32_t bits; + unsigned int i; + unsigned long flags; + int retval; + + disable_ai_pacing(dev); + abort_dma(dev, 1); + + retval = setup_channel_queue(dev, cmd); + if (retval < 0) + return retval; + + /* make sure internal calibration source is turned off */ + writew(0, devpriv->main_iobase + CALIBRATION_REG); + + set_ai_pacing(dev, cmd); + + setup_sample_counters(dev, cmd); + + enable_ai_interrupts(dev, cmd); + + spin_lock_irqsave(&dev->spinlock, flags); + /* set mode, allow conversions through software gate */ + devpriv->adc_control1_bits |= ADC_SW_GATE_BIT; + devpriv->adc_control1_bits &= ~ADC_DITHER_BIT; + if (thisboard->layout != LAYOUT_4020) { + devpriv->adc_control1_bits &= ~ADC_MODE_MASK; + if (cmd->convert_src == TRIG_EXT) + /* good old mode 13 */ + devpriv->adc_control1_bits |= adc_mode_bits(13); + else + /* mode 8. What else could you need? */ + devpriv->adc_control1_bits |= adc_mode_bits(8); + } else { + devpriv->adc_control1_bits &= ~CHANNEL_MODE_4020_MASK; + if (cmd->chanlist_len == 4) + devpriv->adc_control1_bits |= FOUR_CHANNEL_4020_BITS; + else if (cmd->chanlist_len == 2) + devpriv->adc_control1_bits |= TWO_CHANNEL_4020_BITS; + devpriv->adc_control1_bits &= ~ADC_LO_CHANNEL_4020_MASK; + devpriv->adc_control1_bits |= + adc_lo_chan_4020_bits(CR_CHAN(cmd->chanlist[0])); + devpriv->adc_control1_bits &= ~ADC_HI_CHANNEL_4020_MASK; + devpriv->adc_control1_bits |= + adc_hi_chan_4020_bits(CR_CHAN(cmd->chanlist + [cmd->chanlist_len - 1])); + } + writew(devpriv->adc_control1_bits, + devpriv->main_iobase + ADC_CONTROL1_REG); + spin_unlock_irqrestore(&dev->spinlock, flags); + + /* clear adc buffer */ + writew(0, devpriv->main_iobase + ADC_BUFFER_CLEAR_REG); + + if ((cmd->flags & CMDF_WAKE_EOS) == 0 || + thisboard->layout == LAYOUT_4020) { + devpriv->ai_dma_index = 0; + + /* set dma transfer size */ + for (i = 0; i < ai_dma_ring_count(thisboard); i++) + devpriv->ai_dma_desc[i].transfer_size = + cpu_to_le32(dma_transfer_size(dev) * + sizeof(uint16_t)); + + /* give location of first dma descriptor */ + load_first_dma_descriptor(dev, 1, + devpriv->ai_dma_desc_bus_addr | + PLX_DESC_IN_PCI_BIT | + PLX_INTR_TERM_COUNT | + PLX_XFER_LOCAL_TO_PCI); + + dma_start_sync(dev, 1); + } + + if (thisboard->layout == LAYOUT_4020) { + /* set source for external triggers */ + bits = 0; + if (cmd->start_src == TRIG_EXT && CR_CHAN(cmd->start_arg)) + bits |= EXT_START_TRIG_BNC_BIT; + if (cmd->stop_src == TRIG_EXT && CR_CHAN(cmd->stop_arg)) + bits |= EXT_STOP_TRIG_BNC_BIT; + writew(bits, devpriv->main_iobase + DAQ_ATRIG_LOW_4020_REG); + } + + spin_lock_irqsave(&dev->spinlock, flags); + + /* enable pacing, triggering, etc */ + bits = ADC_ENABLE_BIT | ADC_SOFT_GATE_BITS | ADC_GATE_LEVEL_BIT; + if (cmd->flags & CMDF_WAKE_EOS) + bits |= ADC_DMA_DISABLE_BIT; + /* set start trigger */ + if (cmd->start_src == TRIG_EXT) { + bits |= ADC_START_TRIG_EXT_BITS; + if (cmd->start_arg & CR_INVERT) + bits |= ADC_START_TRIG_FALLING_BIT; + } else if (cmd->start_src == TRIG_NOW) { + bits |= ADC_START_TRIG_SOFT_BITS; + } + if (use_hw_sample_counter(cmd)) + bits |= ADC_SAMPLE_COUNTER_EN_BIT; + writew(bits, devpriv->main_iobase + ADC_CONTROL0_REG); + + devpriv->ai_cmd_running = 1; + + spin_unlock_irqrestore(&dev->spinlock, flags); + + /* start acquisition */ + if (cmd->start_src == TRIG_NOW) + writew(0, devpriv->main_iobase + ADC_START_REG); + + return 0; +} + +/* read num_samples from 16 bit wide ai fifo */ +static void pio_drain_ai_fifo_16(struct comedi_device *dev) +{ + struct pcidas64_private *devpriv = dev->private; + struct comedi_subdevice *s = dev->read_subdev; + unsigned int i; + uint16_t prepost_bits; + int read_segment, read_index, write_segment, write_index; + int num_samples; + + do { + /* get least significant 15 bits */ + read_index = readw(devpriv->main_iobase + ADC_READ_PNTR_REG) & + 0x7fff; + write_index = readw(devpriv->main_iobase + ADC_WRITE_PNTR_REG) & + 0x7fff; + /* Get most significant bits (grey code). + * Different boards use different code so use a scheme + * that doesn't depend on encoding. This read must + * occur after reading least significant 15 bits to avoid race + * with fifo switching to next segment. */ + prepost_bits = readw(devpriv->main_iobase + PREPOST_REG); + + /* if read and write pointers are not on the same fifo segment, + * read to the end of the read segment */ + read_segment = adc_upper_read_ptr_code(prepost_bits); + write_segment = adc_upper_write_ptr_code(prepost_bits); + + if (read_segment != write_segment) + num_samples = + devpriv->ai_fifo_segment_length - read_index; + else + num_samples = write_index - read_index; + if (num_samples < 0) { + dev_err(dev->class_dev, + "cb_pcidas64: bug! num_samples < 0\n"); + break; + } + + num_samples = comedi_nsamples_left(s, num_samples); + if (num_samples == 0) + break; + + for (i = 0; i < num_samples; i++) { + unsigned short val; + + val = readw(devpriv->main_iobase + ADC_FIFO_REG); + comedi_buf_write_samples(s, &val, 1); + } + + } while (read_segment != write_segment); +} + +/* Read from 32 bit wide ai fifo of 4020 - deal with insane grey coding of + * pointers. The pci-4020 hardware only supports dma transfers (it only + * supports the use of pio for draining the last remaining points from the + * fifo when a data acquisition operation has completed). + */ +static void pio_drain_ai_fifo_32(struct comedi_device *dev) +{ + struct pcidas64_private *devpriv = dev->private; + struct comedi_subdevice *s = dev->read_subdev; + unsigned int nsamples; + unsigned int i; + uint32_t fifo_data; + int write_code = + readw(devpriv->main_iobase + ADC_WRITE_PNTR_REG) & 0x7fff; + int read_code = + readw(devpriv->main_iobase + ADC_READ_PNTR_REG) & 0x7fff; + + nsamples = comedi_nsamples_left(s, 100000); + for (i = 0; read_code != write_code && i < nsamples;) { + unsigned short val; + + fifo_data = readl(dev->mmio + ADC_FIFO_REG); + val = fifo_data & 0xffff; + comedi_buf_write_samples(s, &val, 1); + i++; + if (i < nsamples) { + val = (fifo_data >> 16) & 0xffff; + comedi_buf_write_samples(s, &val, 1); + i++; + } + read_code = readw(devpriv->main_iobase + ADC_READ_PNTR_REG) & + 0x7fff; + } +} + +/* empty fifo */ +static void pio_drain_ai_fifo(struct comedi_device *dev) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + + if (thisboard->layout == LAYOUT_4020) + pio_drain_ai_fifo_32(dev); + else + pio_drain_ai_fifo_16(dev); +} + +static void drain_dma_buffers(struct comedi_device *dev, unsigned int channel) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + struct comedi_subdevice *s = dev->read_subdev; + uint32_t next_transfer_addr; + int j; + int num_samples = 0; + void __iomem *pci_addr_reg; + + if (channel) + pci_addr_reg = + devpriv->plx9080_iobase + PLX_DMA1_PCI_ADDRESS_REG; + else + pci_addr_reg = + devpriv->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG; + + /* loop until we have read all the full buffers */ + for (j = 0, next_transfer_addr = readl(pci_addr_reg); + (next_transfer_addr < + devpriv->ai_buffer_bus_addr[devpriv->ai_dma_index] || + next_transfer_addr >= + devpriv->ai_buffer_bus_addr[devpriv->ai_dma_index] + + DMA_BUFFER_SIZE) && j < ai_dma_ring_count(thisboard); j++) { + /* transfer data from dma buffer to comedi buffer */ + num_samples = comedi_nsamples_left(s, dma_transfer_size(dev)); + comedi_buf_write_samples(s, + devpriv->ai_buffer[devpriv->ai_dma_index], + num_samples); + devpriv->ai_dma_index = (devpriv->ai_dma_index + 1) % + ai_dma_ring_count(thisboard); + } + /* XXX check for dma ring buffer overrun + * (use end-of-chain bit to mark last unused buffer) */ +} + +static void handle_ai_interrupt(struct comedi_device *dev, + unsigned short status, + unsigned int plx_status) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + struct comedi_subdevice *s = dev->read_subdev; + struct comedi_async *async = s->async; + struct comedi_cmd *cmd = &async->cmd; + uint8_t dma1_status; + unsigned long flags; + + /* check for fifo overrun */ + if (status & ADC_OVERRUN_BIT) { + dev_err(dev->class_dev, "fifo overrun\n"); + async->events |= COMEDI_CB_ERROR; + } + /* spin lock makes sure no one else changes plx dma control reg */ + spin_lock_irqsave(&dev->spinlock, flags); + dma1_status = readb(devpriv->plx9080_iobase + PLX_DMA1_CS_REG); + if (plx_status & ICS_DMA1_A) { /* dma chan 1 interrupt */ + writeb((dma1_status & PLX_DMA_EN_BIT) | PLX_CLEAR_DMA_INTR_BIT, + devpriv->plx9080_iobase + PLX_DMA1_CS_REG); + + if (dma1_status & PLX_DMA_EN_BIT) + drain_dma_buffers(dev, 1); + } + spin_unlock_irqrestore(&dev->spinlock, flags); + + /* drain fifo with pio */ + if ((status & ADC_DONE_BIT) || + ((cmd->flags & CMDF_WAKE_EOS) && + (status & ADC_INTR_PENDING_BIT) && + (thisboard->layout != LAYOUT_4020))) { + spin_lock_irqsave(&dev->spinlock, flags); + if (devpriv->ai_cmd_running) { + spin_unlock_irqrestore(&dev->spinlock, flags); + pio_drain_ai_fifo(dev); + } else { + spin_unlock_irqrestore(&dev->spinlock, flags); + } + } + /* if we are have all the data, then quit */ + if ((cmd->stop_src == TRIG_COUNT && + async->scans_done >= cmd->stop_arg) || + (cmd->stop_src == TRIG_EXT && (status & ADC_STOP_BIT))) + async->events |= COMEDI_CB_EOA; + + comedi_handle_events(dev, s); +} + +static inline unsigned int prev_ao_dma_index(struct comedi_device *dev) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned int buffer_index; + + if (devpriv->ao_dma_index == 0) + buffer_index = AO_DMA_RING_COUNT - 1; + else + buffer_index = devpriv->ao_dma_index - 1; + return buffer_index; +} + +static int last_ao_dma_load_completed(struct comedi_device *dev) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned int buffer_index; + unsigned int transfer_address; + unsigned short dma_status; + + buffer_index = prev_ao_dma_index(dev); + dma_status = readb(devpriv->plx9080_iobase + PLX_DMA0_CS_REG); + if ((dma_status & PLX_DMA_DONE_BIT) == 0) + return 0; + + transfer_address = + readl(devpriv->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG); + if (transfer_address != devpriv->ao_buffer_bus_addr[buffer_index]) + return 0; + + return 1; +} + +static inline int ao_dma_needs_restart(struct comedi_device *dev, + unsigned short dma_status) +{ + if ((dma_status & PLX_DMA_DONE_BIT) == 0 || + (dma_status & PLX_DMA_EN_BIT) == 0) + return 0; + if (last_ao_dma_load_completed(dev)) + return 0; + + return 1; +} + +static void restart_ao_dma(struct comedi_device *dev) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned int dma_desc_bits; + + dma_desc_bits = + readl(devpriv->plx9080_iobase + PLX_DMA0_DESCRIPTOR_REG); + dma_desc_bits &= ~PLX_END_OF_CHAIN_BIT; + load_first_dma_descriptor(dev, 0, dma_desc_bits); + + dma_start_sync(dev, 0); +} + +static unsigned int cb_pcidas64_ao_fill_buffer(struct comedi_device *dev, + struct comedi_subdevice *s, + unsigned short *dest, + unsigned int max_bytes) +{ + unsigned int nsamples = comedi_bytes_to_samples(s, max_bytes); + unsigned int actual_bytes; + + nsamples = comedi_nsamples_left(s, nsamples); + actual_bytes = comedi_buf_read_samples(s, dest, nsamples); + + return comedi_bytes_to_samples(s, actual_bytes); +} + +static unsigned int load_ao_dma_buffer(struct comedi_device *dev, + const struct comedi_cmd *cmd) +{ + struct pcidas64_private *devpriv = dev->private; + struct comedi_subdevice *s = dev->write_subdev; + unsigned int buffer_index = devpriv->ao_dma_index; + unsigned int prev_buffer_index = prev_ao_dma_index(dev); + unsigned int nsamples; + unsigned int nbytes; + unsigned int next_bits; + + nsamples = cb_pcidas64_ao_fill_buffer(dev, s, + devpriv->ao_buffer[buffer_index], + DMA_BUFFER_SIZE); + if (nsamples == 0) + return 0; + + nbytes = comedi_samples_to_bytes(s, nsamples); + devpriv->ao_dma_desc[buffer_index].transfer_size = cpu_to_le32(nbytes); + /* set end of chain bit so we catch underruns */ + next_bits = le32_to_cpu(devpriv->ao_dma_desc[buffer_index].next); + next_bits |= PLX_END_OF_CHAIN_BIT; + devpriv->ao_dma_desc[buffer_index].next = cpu_to_le32(next_bits); + /* clear end of chain bit on previous buffer now that we have set it + * for the last buffer */ + next_bits = le32_to_cpu(devpriv->ao_dma_desc[prev_buffer_index].next); + next_bits &= ~PLX_END_OF_CHAIN_BIT; + devpriv->ao_dma_desc[prev_buffer_index].next = cpu_to_le32(next_bits); + + devpriv->ao_dma_index = (buffer_index + 1) % AO_DMA_RING_COUNT; + + return nbytes; +} + +static void load_ao_dma(struct comedi_device *dev, const struct comedi_cmd *cmd) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned int num_bytes; + unsigned int next_transfer_addr; + void __iomem *pci_addr_reg = + devpriv->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG; + unsigned int buffer_index; + + do { + buffer_index = devpriv->ao_dma_index; + /* don't overwrite data that hasn't been transferred yet */ + next_transfer_addr = readl(pci_addr_reg); + if (next_transfer_addr >= + devpriv->ao_buffer_bus_addr[buffer_index] && + next_transfer_addr < + devpriv->ao_buffer_bus_addr[buffer_index] + + DMA_BUFFER_SIZE) + return; + num_bytes = load_ao_dma_buffer(dev, cmd); + } while (num_bytes >= DMA_BUFFER_SIZE); +} + +static void handle_ao_interrupt(struct comedi_device *dev, + unsigned short status, unsigned int plx_status) +{ + struct pcidas64_private *devpriv = dev->private; + struct comedi_subdevice *s = dev->write_subdev; + struct comedi_async *async; + struct comedi_cmd *cmd; + uint8_t dma0_status; + unsigned long flags; + + /* board might not support ao, in which case write_subdev is NULL */ + if (!s) + return; + async = s->async; + cmd = &async->cmd; + + /* spin lock makes sure no one else changes plx dma control reg */ + spin_lock_irqsave(&dev->spinlock, flags); + dma0_status = readb(devpriv->plx9080_iobase + PLX_DMA0_CS_REG); + if (plx_status & ICS_DMA0_A) { /* dma chan 0 interrupt */ + if ((dma0_status & PLX_DMA_EN_BIT) && + !(dma0_status & PLX_DMA_DONE_BIT)) + writeb(PLX_DMA_EN_BIT | PLX_CLEAR_DMA_INTR_BIT, + devpriv->plx9080_iobase + PLX_DMA0_CS_REG); + else + writeb(PLX_CLEAR_DMA_INTR_BIT, + devpriv->plx9080_iobase + PLX_DMA0_CS_REG); + spin_unlock_irqrestore(&dev->spinlock, flags); + if (dma0_status & PLX_DMA_EN_BIT) { + load_ao_dma(dev, cmd); + /* try to recover from dma end-of-chain event */ + if (ao_dma_needs_restart(dev, dma0_status)) + restart_ao_dma(dev); + } + } else { + spin_unlock_irqrestore(&dev->spinlock, flags); + } + + if ((status & DAC_DONE_BIT)) { + if ((cmd->stop_src == TRIG_COUNT && + async->scans_done >= cmd->stop_arg) || + last_ao_dma_load_completed(dev)) + async->events |= COMEDI_CB_EOA; + else + async->events |= COMEDI_CB_ERROR; + } + comedi_handle_events(dev, s); +} + +static irqreturn_t handle_interrupt(int irq, void *d) +{ + struct comedi_device *dev = d; + struct pcidas64_private *devpriv = dev->private; + unsigned short status; + uint32_t plx_status; + uint32_t plx_bits; + + plx_status = readl(devpriv->plx9080_iobase + PLX_INTRCS_REG); + status = readw(devpriv->main_iobase + HW_STATUS_REG); + + /* an interrupt before all the postconfig stuff gets done could + * cause a NULL dereference if we continue through the + * interrupt handler */ + if (!dev->attached) + return IRQ_HANDLED; + + handle_ai_interrupt(dev, status, plx_status); + handle_ao_interrupt(dev, status, plx_status); + + /* clear possible plx9080 interrupt sources */ + if (plx_status & ICS_LDIA) { /* clear local doorbell interrupt */ + plx_bits = readl(devpriv->plx9080_iobase + PLX_DBR_OUT_REG); + writel(plx_bits, devpriv->plx9080_iobase + PLX_DBR_OUT_REG); + } + + return IRQ_HANDLED; +} + +static int ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned long flags; + + spin_lock_irqsave(&dev->spinlock, flags); + if (devpriv->ai_cmd_running == 0) { + spin_unlock_irqrestore(&dev->spinlock, flags); + return 0; + } + devpriv->ai_cmd_running = 0; + spin_unlock_irqrestore(&dev->spinlock, flags); + + disable_ai_pacing(dev); + + abort_dma(dev, 1); + + return 0; +} + +static int ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s, + struct comedi_insn *insn, unsigned int *data) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + int chan = CR_CHAN(insn->chanspec); + int range = CR_RANGE(insn->chanspec); + + /* do some initializing */ + writew(0, devpriv->main_iobase + DAC_CONTROL0_REG); + + /* set range */ + set_dac_range_bits(dev, &devpriv->dac_control1_bits, chan, range); + writew(devpriv->dac_control1_bits, + devpriv->main_iobase + DAC_CONTROL1_REG); + + /* write to channel */ + if (thisboard->layout == LAYOUT_4020) { + writew(data[0] & 0xff, + devpriv->main_iobase + dac_lsb_4020_reg(chan)); + writew((data[0] >> 8) & 0xf, + devpriv->main_iobase + dac_msb_4020_reg(chan)); + } else { + writew(data[0], devpriv->main_iobase + dac_convert_reg(chan)); + } + + /* remember output value */ + s->readback[chan] = data[0]; + + return 1; +} + +static void set_dac_control0_reg(struct comedi_device *dev, + const struct comedi_cmd *cmd) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned int bits = DAC_ENABLE_BIT | WAVEFORM_GATE_LEVEL_BIT | + WAVEFORM_GATE_ENABLE_BIT | WAVEFORM_GATE_SELECT_BIT; + + if (cmd->start_src == TRIG_EXT) { + bits |= WAVEFORM_TRIG_EXT_BITS; + if (cmd->start_arg & CR_INVERT) + bits |= WAVEFORM_TRIG_FALLING_BIT; + } else { + bits |= WAVEFORM_TRIG_SOFT_BITS; + } + if (cmd->scan_begin_src == TRIG_EXT) { + bits |= DAC_EXT_UPDATE_ENABLE_BIT; + if (cmd->scan_begin_arg & CR_INVERT) + bits |= DAC_EXT_UPDATE_FALLING_BIT; + } + writew(bits, devpriv->main_iobase + DAC_CONTROL0_REG); +} + +static void set_dac_control1_reg(struct comedi_device *dev, + const struct comedi_cmd *cmd) +{ + struct pcidas64_private *devpriv = dev->private; + int i; + + for (i = 0; i < cmd->chanlist_len; i++) { + int channel, range; + + channel = CR_CHAN(cmd->chanlist[i]); + range = CR_RANGE(cmd->chanlist[i]); + set_dac_range_bits(dev, &devpriv->dac_control1_bits, channel, + range); + } + devpriv->dac_control1_bits |= DAC_SW_GATE_BIT; + writew(devpriv->dac_control1_bits, + devpriv->main_iobase + DAC_CONTROL1_REG); +} + +static void set_dac_select_reg(struct comedi_device *dev, + const struct comedi_cmd *cmd) +{ + struct pcidas64_private *devpriv = dev->private; + uint16_t bits; + unsigned int first_channel, last_channel; + + first_channel = CR_CHAN(cmd->chanlist[0]); + last_channel = CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]); + if (last_channel < first_channel) + dev_err(dev->class_dev, + "bug! last ao channel < first ao channel\n"); + + bits = (first_channel & 0x7) | (last_channel & 0x7) << 3; + + writew(bits, devpriv->main_iobase + DAC_SELECT_REG); +} + +static unsigned int get_ao_divisor(unsigned int ns, unsigned int flags) +{ + return get_divisor(ns, flags) - 2; +} + +static void set_dac_interval_regs(struct comedi_device *dev, + const struct comedi_cmd *cmd) +{ + struct pcidas64_private *devpriv = dev->private; + unsigned int divisor; + + if (cmd->scan_begin_src != TRIG_TIMER) + return; + + divisor = get_ao_divisor(cmd->scan_begin_arg, cmd->flags); + if (divisor > max_counter_value) { + dev_err(dev->class_dev, "bug! ao divisor too big\n"); + divisor = max_counter_value; + } + writew(divisor & 0xffff, + devpriv->main_iobase + DAC_SAMPLE_INTERVAL_LOWER_REG); + writew((divisor >> 16) & 0xff, + devpriv->main_iobase + DAC_SAMPLE_INTERVAL_UPPER_REG); +} + +static int prep_ao_dma(struct comedi_device *dev, const struct comedi_cmd *cmd) +{ + struct pcidas64_private *devpriv = dev->private; + struct comedi_subdevice *s = dev->write_subdev; + unsigned int nsamples; + unsigned int nbytes; + int i; + + /* clear queue pointer too, since external queue has + * weird interactions with ao fifo */ + writew(0, devpriv->main_iobase + ADC_QUEUE_CLEAR_REG); + writew(0, devpriv->main_iobase + DAC_BUFFER_CLEAR_REG); + + nsamples = cb_pcidas64_ao_fill_buffer(dev, s, + devpriv->ao_bounce_buffer, + DAC_FIFO_SIZE); + if (nsamples == 0) + return -1; + + for (i = 0; i < nsamples; i++) { + writew(devpriv->ao_bounce_buffer[i], + devpriv->main_iobase + DAC_FIFO_REG); + } + + if (cmd->stop_src == TRIG_COUNT && + s->async->scans_done >= cmd->stop_arg) + return 0; + + nbytes = load_ao_dma_buffer(dev, cmd); + if (nbytes == 0) + return -1; + load_ao_dma(dev, cmd); + + dma_start_sync(dev, 0); + + return 0; +} + +static inline int external_ai_queue_in_use(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_cmd *cmd) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + + if (s->busy) + return 0; + if (thisboard->layout == LAYOUT_4020) + return 0; + else if (use_internal_queue_6xxx(cmd)) + return 0; + return 1; +} + +static int ao_inttrig(struct comedi_device *dev, struct comedi_subdevice *s, + unsigned int trig_num) +{ + struct pcidas64_private *devpriv = dev->private; + struct comedi_cmd *cmd = &s->async->cmd; + int retval; + + if (trig_num != cmd->start_arg) + return -EINVAL; + + retval = prep_ao_dma(dev, cmd); + if (retval < 0) + return -EPIPE; + + set_dac_control0_reg(dev, cmd); + + if (cmd->start_src == TRIG_INT) + writew(0, devpriv->main_iobase + DAC_START_REG); + + s->async->inttrig = NULL; + + return 0; +} + +static int ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s) +{ + struct pcidas64_private *devpriv = dev->private; + struct comedi_cmd *cmd = &s->async->cmd; + + if (external_ai_queue_in_use(dev, s, cmd)) { + warn_external_queue(dev); + return -EBUSY; + } + /* disable analog output system during setup */ + writew(0x0, devpriv->main_iobase + DAC_CONTROL0_REG); + + devpriv->ao_dma_index = 0; + + set_dac_select_reg(dev, cmd); + set_dac_interval_regs(dev, cmd); + load_first_dma_descriptor(dev, 0, devpriv->ao_dma_desc_bus_addr | + PLX_DESC_IN_PCI_BIT | PLX_INTR_TERM_COUNT); + + set_dac_control1_reg(dev, cmd); + s->async->inttrig = ao_inttrig; + + return 0; +} + +static int cb_pcidas64_ao_check_chanlist(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_cmd *cmd) +{ + unsigned int chan0 = CR_CHAN(cmd->chanlist[0]); + int i; + + for (i = 1; i < cmd->chanlist_len; i++) { + unsigned int chan = CR_CHAN(cmd->chanlist[i]); + + if (chan != (chan0 + i)) { + dev_dbg(dev->class_dev, + "chanlist must use consecutive channels\n"); + return -EINVAL; + } + } + + return 0; +} + +static int ao_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, + struct comedi_cmd *cmd) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + int err = 0; + unsigned int tmp_arg; + + /* Step 1 : check if triggers are trivially valid */ + + err |= comedi_check_trigger_src(&cmd->start_src, TRIG_INT | TRIG_EXT); + err |= comedi_check_trigger_src(&cmd->scan_begin_src, + TRIG_TIMER | TRIG_EXT); + err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW); + err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT); + err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_NONE); + + if (err) + return 1; + + /* Step 2a : make sure trigger sources are unique */ + + err |= comedi_check_trigger_is_unique(cmd->start_src); + err |= comedi_check_trigger_is_unique(cmd->scan_begin_src); + + /* Step 2b : and mutually compatible */ + + if (cmd->convert_src == TRIG_EXT && cmd->scan_begin_src == TRIG_TIMER) + err |= -EINVAL; + if (cmd->stop_src != TRIG_COUNT && + cmd->stop_src != TRIG_NONE && cmd->stop_src != TRIG_EXT) + err |= -EINVAL; + + if (err) + return 2; + + /* Step 3: check if arguments are trivially valid */ + + err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0); + + if (cmd->scan_begin_src == TRIG_TIMER) { + err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg, + thisboard->ao_scan_speed); + if (get_ao_divisor(cmd->scan_begin_arg, cmd->flags) > + max_counter_value) { + cmd->scan_begin_arg = (max_counter_value + 2) * + TIMER_BASE; + err |= -EINVAL; + } + } + + err |= comedi_check_trigger_arg_min(&cmd->chanlist_len, 1); + err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, + cmd->chanlist_len); + + if (err) + return 3; + + /* step 4: fix up any arguments */ + + if (cmd->scan_begin_src == TRIG_TIMER) { + tmp_arg = cmd->scan_begin_arg; + cmd->scan_begin_arg = get_divisor(cmd->scan_begin_arg, + cmd->flags) * TIMER_BASE; + if (tmp_arg != cmd->scan_begin_arg) + err++; + } + + if (err) + return 4; + + /* Step 5: check channel list if it exists */ + if (cmd->chanlist && cmd->chanlist_len > 0) + err |= cb_pcidas64_ao_check_chanlist(dev, s, cmd); + + if (err) + return 5; + + return 0; +} + +static int ao_cancel(struct comedi_device *dev, struct comedi_subdevice *s) +{ + struct pcidas64_private *devpriv = dev->private; + + writew(0x0, devpriv->main_iobase + DAC_CONTROL0_REG); + abort_dma(dev, 0); + return 0; +} + +static int dio_callback_4020(struct comedi_device *dev, + int dir, int port, int data, unsigned long iobase) +{ + struct pcidas64_private *devpriv = dev->private; + + if (dir) { + writew(data, devpriv->main_iobase + iobase + 2 * port); + return 0; + } + return readw(devpriv->main_iobase + iobase + 2 * port); +} + +static int di_rbits(struct comedi_device *dev, struct comedi_subdevice *s, + struct comedi_insn *insn, unsigned int *data) +{ + unsigned int bits; + + bits = readb(dev->mmio + DI_REG); + bits &= 0xf; + data[1] = bits; + data[0] = 0; + + return insn->n; +} + +static int do_wbits(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + if (comedi_dio_update_state(s, data)) + writeb(s->state, dev->mmio + DO_REG); + + data[1] = s->state; + + return insn->n; +} + +static int dio_60xx_config_insn(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + int ret; + + ret = comedi_dio_insn_config(dev, s, insn, data, 0); + if (ret) + return ret; + + writeb(s->io_bits, dev->mmio + DIO_DIRECTION_60XX_REG); + + return insn->n; +} + +static int dio_60xx_wbits(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + if (comedi_dio_update_state(s, data)) + writeb(s->state, dev->mmio + DIO_DATA_60XX_REG); + + data[1] = readb(dev->mmio + DIO_DATA_60XX_REG); + + return insn->n; +} + +/* pci-6025 8800 caldac: + * address 0 == dac channel 0 offset + * address 1 == dac channel 0 gain + * address 2 == dac channel 1 offset + * address 3 == dac channel 1 gain + * address 4 == fine adc offset + * address 5 == coarse adc offset + * address 6 == coarse adc gain + * address 7 == fine adc gain + */ +/* pci-6402/16 uses all 8 channels for dac: + * address 0 == dac channel 0 fine gain + * address 1 == dac channel 0 coarse gain + * address 2 == dac channel 0 coarse offset + * address 3 == dac channel 1 coarse offset + * address 4 == dac channel 1 fine gain + * address 5 == dac channel 1 coarse gain + * address 6 == dac channel 0 fine offset + * address 7 == dac channel 1 fine offset +*/ + +static int caldac_8800_write(struct comedi_device *dev, unsigned int address, + uint8_t value) +{ + struct pcidas64_private *devpriv = dev->private; + static const int num_caldac_channels = 8; + static const int bitstream_length = 11; + unsigned int bitstream = ((address & 0x7) << 8) | value; + unsigned int bit, register_bits; + static const int caldac_8800_udelay = 1; + + if (address >= num_caldac_channels) { + dev_err(dev->class_dev, "illegal caldac channel\n"); + return -1; + } + for (bit = 1 << (bitstream_length - 1); bit; bit >>= 1) { + register_bits = 0; + if (bitstream & bit) + register_bits |= SERIAL_DATA_IN_BIT; + udelay(caldac_8800_udelay); + writew(register_bits, devpriv->main_iobase + CALIBRATION_REG); + register_bits |= SERIAL_CLOCK_BIT; + udelay(caldac_8800_udelay); + writew(register_bits, devpriv->main_iobase + CALIBRATION_REG); + } + udelay(caldac_8800_udelay); + writew(SELECT_8800_BIT, devpriv->main_iobase + CALIBRATION_REG); + udelay(caldac_8800_udelay); + writew(0, devpriv->main_iobase + CALIBRATION_REG); + udelay(caldac_8800_udelay); + return 0; +} + +/* 4020 caldacs */ +static int caldac_i2c_write(struct comedi_device *dev, + unsigned int caldac_channel, unsigned int value) +{ + uint8_t serial_bytes[3]; + uint8_t i2c_addr; + enum pointer_bits { + /* manual has gain and offset bits switched */ + OFFSET_0_2 = 0x1, + GAIN_0_2 = 0x2, + OFFSET_1_3 = 0x4, + GAIN_1_3 = 0x8, + }; + enum data_bits { + NOT_CLEAR_REGISTERS = 0x20, + }; + + switch (caldac_channel) { + case 0: /* chan 0 offset */ + i2c_addr = CALDAC0_I2C_ADDR; + serial_bytes[0] = OFFSET_0_2; + break; + case 1: /* chan 1 offset */ + i2c_addr = CALDAC0_I2C_ADDR; + serial_bytes[0] = OFFSET_1_3; + break; + case 2: /* chan 2 offset */ + i2c_addr = CALDAC1_I2C_ADDR; + serial_bytes[0] = OFFSET_0_2; + break; + case 3: /* chan 3 offset */ + i2c_addr = CALDAC1_I2C_ADDR; + serial_bytes[0] = OFFSET_1_3; + break; + case 4: /* chan 0 gain */ + i2c_addr = CALDAC0_I2C_ADDR; + serial_bytes[0] = GAIN_0_2; + break; + case 5: /* chan 1 gain */ + i2c_addr = CALDAC0_I2C_ADDR; + serial_bytes[0] = GAIN_1_3; + break; + case 6: /* chan 2 gain */ + i2c_addr = CALDAC1_I2C_ADDR; + serial_bytes[0] = GAIN_0_2; + break; + case 7: /* chan 3 gain */ + i2c_addr = CALDAC1_I2C_ADDR; + serial_bytes[0] = GAIN_1_3; + break; + default: + dev_err(dev->class_dev, "invalid caldac channel\n"); + return -1; + } + serial_bytes[1] = NOT_CLEAR_REGISTERS | ((value >> 8) & 0xf); + serial_bytes[2] = value & 0xff; + i2c_write(dev, i2c_addr, serial_bytes, 3); + return 0; +} + +static void caldac_write(struct comedi_device *dev, unsigned int channel, + unsigned int value) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + + switch (thisboard->layout) { + case LAYOUT_60XX: + case LAYOUT_64XX: + caldac_8800_write(dev, channel, value); + break; + case LAYOUT_4020: + caldac_i2c_write(dev, channel, value); + break; + default: + break; + } +} + +static int cb_pcidas64_calib_insn_write(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + unsigned int chan = CR_CHAN(insn->chanspec); + + /* + * Programming the calib device is slow. Only write the + * last data value if the value has changed. + */ + if (insn->n) { + unsigned int val = data[insn->n - 1]; + + if (s->readback[chan] != val) { + caldac_write(dev, chan, val); + s->readback[chan] = val; + } + } + + return insn->n; +} + +static void ad8402_write(struct comedi_device *dev, unsigned int channel, + unsigned int value) +{ + struct pcidas64_private *devpriv = dev->private; + static const int bitstream_length = 10; + unsigned int bit, register_bits; + unsigned int bitstream = ((channel & 0x3) << 8) | (value & 0xff); + static const int ad8402_udelay = 1; + + register_bits = SELECT_8402_64XX_BIT; + udelay(ad8402_udelay); + writew(register_bits, devpriv->main_iobase + CALIBRATION_REG); + + for (bit = 1 << (bitstream_length - 1); bit; bit >>= 1) { + if (bitstream & bit) + register_bits |= SERIAL_DATA_IN_BIT; + else + register_bits &= ~SERIAL_DATA_IN_BIT; + udelay(ad8402_udelay); + writew(register_bits, devpriv->main_iobase + CALIBRATION_REG); + udelay(ad8402_udelay); + writew(register_bits | SERIAL_CLOCK_BIT, + devpriv->main_iobase + CALIBRATION_REG); + } + + udelay(ad8402_udelay); + writew(0, devpriv->main_iobase + CALIBRATION_REG); +} + +/* for pci-das6402/16, channel 0 is analog input gain and channel 1 is offset */ +static int cb_pcidas64_ad8402_insn_write(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + unsigned int chan = CR_CHAN(insn->chanspec); + + /* + * Programming the calib device is slow. Only write the + * last data value if the value has changed. + */ + if (insn->n) { + unsigned int val = data[insn->n - 1]; + + if (s->readback[chan] != val) { + ad8402_write(dev, chan, val); + s->readback[chan] = val; + } + } + + return insn->n; +} + +static uint16_t read_eeprom(struct comedi_device *dev, uint8_t address) +{ + struct pcidas64_private *devpriv = dev->private; + static const int bitstream_length = 11; + static const int read_command = 0x6; + unsigned int bitstream = (read_command << 8) | address; + unsigned int bit; + void __iomem * const plx_control_addr = + devpriv->plx9080_iobase + PLX_CONTROL_REG; + uint16_t value; + static const int value_length = 16; + static const int eeprom_udelay = 1; + + udelay(eeprom_udelay); + devpriv->plx_control_bits &= ~CTL_EE_CLK & ~CTL_EE_CS; + /* make sure we don't send anything to the i2c bus on 4020 */ + devpriv->plx_control_bits |= CTL_USERO; + writel(devpriv->plx_control_bits, plx_control_addr); + /* activate serial eeprom */ + udelay(eeprom_udelay); + devpriv->plx_control_bits |= CTL_EE_CS; + writel(devpriv->plx_control_bits, plx_control_addr); + + /* write read command and desired memory address */ + for (bit = 1 << (bitstream_length - 1); bit; bit >>= 1) { + /* set bit to be written */ + udelay(eeprom_udelay); + if (bitstream & bit) + devpriv->plx_control_bits |= CTL_EE_W; + else + devpriv->plx_control_bits &= ~CTL_EE_W; + writel(devpriv->plx_control_bits, plx_control_addr); + /* clock in bit */ + udelay(eeprom_udelay); + devpriv->plx_control_bits |= CTL_EE_CLK; + writel(devpriv->plx_control_bits, plx_control_addr); + udelay(eeprom_udelay); + devpriv->plx_control_bits &= ~CTL_EE_CLK; + writel(devpriv->plx_control_bits, plx_control_addr); + } + /* read back value from eeprom memory location */ + value = 0; + for (bit = 1 << (value_length - 1); bit; bit >>= 1) { + /* clock out bit */ + udelay(eeprom_udelay); + devpriv->plx_control_bits |= CTL_EE_CLK; + writel(devpriv->plx_control_bits, plx_control_addr); + udelay(eeprom_udelay); + devpriv->plx_control_bits &= ~CTL_EE_CLK; + writel(devpriv->plx_control_bits, plx_control_addr); + udelay(eeprom_udelay); + if (readl(plx_control_addr) & CTL_EE_R) + value |= bit; + } + + /* deactivate eeprom serial input */ + udelay(eeprom_udelay); + devpriv->plx_control_bits &= ~CTL_EE_CS; + writel(devpriv->plx_control_bits, plx_control_addr); + + return value; +} + +static int eeprom_read_insn(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, unsigned int *data) +{ + data[0] = read_eeprom(dev, CR_CHAN(insn->chanspec)); + + return 1; +} + +/* Allocate and initialize the subdevice structures. + */ +static int setup_subdevices(struct comedi_device *dev) +{ + const struct pcidas64_board *thisboard = dev->board_ptr; + struct pcidas64_private *devpriv = dev->private; + struct comedi_subdevice *s; + int i; + int ret; + + ret = comedi_alloc_subdevices(dev, 10); + if (ret) + return ret; + + s = &dev->subdevices[0]; + /* analog input subdevice */ + dev->read_subdev = s; + s->type = COMEDI_SUBD_AI; + s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DITHER | SDF_CMD_READ; + if (thisboard->layout == LAYOUT_60XX) + s->subdev_flags |= SDF_COMMON | SDF_DIFF; + else if (thisboard->layout == LAYOUT_64XX) + s->subdev_flags |= SDF_DIFF; + /* XXX Number of inputs in differential mode is ignored */ + s->n_chan = thisboard->ai_se_chans; + s->len_chanlist = 0x2000; + s->maxdata = (1 << thisboard->ai_bits) - 1; + s->range_table = thisboard->ai_range_table; + s->insn_read = ai_rinsn; + s->insn_config = ai_config_insn; + s->do_cmd = ai_cmd; + s->do_cmdtest = ai_cmdtest; + s->cancel = ai_cancel; + if (thisboard->layout == LAYOUT_4020) { + uint8_t data; + /* set adc to read from inputs + * (not internal calibration sources) */ + devpriv->i2c_cal_range_bits = adc_src_4020_bits(4); + /* set channels to +-5 volt input ranges */ + for (i = 0; i < s->n_chan; i++) + devpriv->i2c_cal_range_bits |= attenuate_bit(i); + data = devpriv->i2c_cal_range_bits; + i2c_write(dev, RANGE_CAL_I2C_ADDR, &data, sizeof(data)); + } + + /* analog output subdevice */ + s = &dev->subdevices[1]; + if (thisboard->ao_nchan) { + s->type = COMEDI_SUBD_AO; + s->subdev_flags = SDF_READABLE | SDF_WRITABLE | + SDF_GROUND | SDF_CMD_WRITE; + s->n_chan = thisboard->ao_nchan; + s->maxdata = (1 << thisboard->ao_bits) - 1; + s->range_table = thisboard->ao_range_table; + s->insn_write = ao_winsn; + + ret = comedi_alloc_subdev_readback(s); + if (ret) + return ret; + + if (ao_cmd_is_supported(thisboard)) { + dev->write_subdev = s; + s->do_cmdtest = ao_cmdtest; + s->do_cmd = ao_cmd; + s->len_chanlist = thisboard->ao_nchan; + s->cancel = ao_cancel; + } + } else { + s->type = COMEDI_SUBD_UNUSED; + } + + /* digital input */ + s = &dev->subdevices[2]; + if (thisboard->layout == LAYOUT_64XX) { + s->type = COMEDI_SUBD_DI; + s->subdev_flags = SDF_READABLE; + s->n_chan = 4; + s->maxdata = 1; + s->range_table = &range_digital; + s->insn_bits = di_rbits; + } else { + s->type = COMEDI_SUBD_UNUSED; + } + + /* digital output */ + if (thisboard->layout == LAYOUT_64XX) { + s = &dev->subdevices[3]; + s->type = COMEDI_SUBD_DO; + s->subdev_flags = SDF_WRITABLE; + s->n_chan = 4; + s->maxdata = 1; + s->range_table = &range_digital; + s->insn_bits = do_wbits; + } else { + s->type = COMEDI_SUBD_UNUSED; + } + + /* 8255 */ + s = &dev->subdevices[4]; + if (thisboard->has_8255) { + if (thisboard->layout == LAYOUT_4020) { + ret = subdev_8255_init(dev, s, dio_callback_4020, + I8255_4020_REG); + } else { + ret = subdev_8255_mm_init(dev, s, NULL, + DIO_8255_OFFSET); + } + if (ret) + return ret; + } else { + s->type = COMEDI_SUBD_UNUSED; + } + + /* 8 channel dio for 60xx */ + s = &dev->subdevices[5]; + if (thisboard->layout == LAYOUT_60XX) { + s->type = COMEDI_SUBD_DIO; + s->subdev_flags = SDF_WRITABLE | SDF_READABLE; + s->n_chan = 8; + s->maxdata = 1; + s->range_table = &range_digital; + s->insn_config = dio_60xx_config_insn; + s->insn_bits = dio_60xx_wbits; + } else { + s->type = COMEDI_SUBD_UNUSED; + } + + /* caldac */ + s = &dev->subdevices[6]; + s->type = COMEDI_SUBD_CALIB; + s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL; + s->n_chan = 8; + if (thisboard->layout == LAYOUT_4020) + s->maxdata = 0xfff; + else + s->maxdata = 0xff; + s->insn_write = cb_pcidas64_calib_insn_write; + + ret = comedi_alloc_subdev_readback(s); + if (ret) + return ret; + + for (i = 0; i < s->n_chan; i++) { + caldac_write(dev, i, s->maxdata / 2); + s->readback[i] = s->maxdata / 2; + } + + /* 2 channel ad8402 potentiometer */ + s = &dev->subdevices[7]; + if (thisboard->layout == LAYOUT_64XX) { + s->type = COMEDI_SUBD_CALIB; + s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL; + s->n_chan = 2; + s->maxdata = 0xff; + s->insn_write = cb_pcidas64_ad8402_insn_write; + + ret = comedi_alloc_subdev_readback(s); + if (ret) + return ret; + + for (i = 0; i < s->n_chan; i++) { + ad8402_write(dev, i, s->maxdata / 2); + s->readback[i] = s->maxdata / 2; + } + } else { + s->type = COMEDI_SUBD_UNUSED; + } + + /* serial EEPROM, if present */ + s = &dev->subdevices[8]; + if (readl(devpriv->plx9080_iobase + PLX_CONTROL_REG) & CTL_EECHK) { + s->type = COMEDI_SUBD_MEMORY; + s->subdev_flags = SDF_READABLE | SDF_INTERNAL; + s->n_chan = 128; + s->maxdata = 0xffff; + s->insn_read = eeprom_read_insn; + } else { + s->type = COMEDI_SUBD_UNUSED; + } + + /* user counter subd XXX */ + s = &dev->subdevices[9]; + s->type = COMEDI_SUBD_UNUSED; + + return 0; +} + +static int auto_attach(struct comedi_device *dev, + unsigned long context) +{ + struct pci_dev *pcidev = comedi_to_pci_dev(dev); + const struct pcidas64_board *thisboard = NULL; + struct pcidas64_private *devpriv; + uint32_t local_range, local_decode; + int retval; + + if (context < ARRAY_SIZE(pcidas64_boards)) + thisboard = &pcidas64_boards[context]; + if (!thisboard) + return -ENODEV; + dev->board_ptr = thisboard; + + devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); + if (!devpriv) + return -ENOMEM; + + retval = comedi_pci_enable(dev); + if (retval) + return retval; + pci_set_master(pcidev); + + /* Initialize dev->board_name */ + dev->board_name = thisboard->name; + + devpriv->main_phys_iobase = pci_resource_start(pcidev, 2); + devpriv->dio_counter_phys_iobase = pci_resource_start(pcidev, 3); + + devpriv->plx9080_iobase = pci_ioremap_bar(pcidev, 0); + devpriv->main_iobase = pci_ioremap_bar(pcidev, 2); + dev->mmio = pci_ioremap_bar(pcidev, 3); + + if (!devpriv->plx9080_iobase || !devpriv->main_iobase || !dev->mmio) { + dev_warn(dev->class_dev, "failed to remap io memory\n"); + return -ENOMEM; + } + + /* figure out what local addresses are */ + local_range = readl(devpriv->plx9080_iobase + PLX_LAS0RNG_REG) & + LRNG_MEM_MASK; + local_decode = readl(devpriv->plx9080_iobase + PLX_LAS0MAP_REG) & + local_range & LMAP_MEM_MASK; + devpriv->local0_iobase = ((uint32_t)devpriv->main_phys_iobase & + ~local_range) | local_decode; + local_range = readl(devpriv->plx9080_iobase + PLX_LAS1RNG_REG) & + LRNG_MEM_MASK; + local_decode = readl(devpriv->plx9080_iobase + PLX_LAS1MAP_REG) & + local_range & LMAP_MEM_MASK; + devpriv->local1_iobase = ((uint32_t)devpriv->dio_counter_phys_iobase & + ~local_range) | local_decode; + + retval = alloc_and_init_dma_members(dev); + if (retval < 0) + return retval; + + devpriv->hw_revision = + hw_revision(dev, readw(devpriv->main_iobase + HW_STATUS_REG)); + dev_dbg(dev->class_dev, "stc hardware revision %i\n", + devpriv->hw_revision); + init_plx9080(dev); + init_stc_registers(dev); + + retval = request_irq(pcidev->irq, handle_interrupt, IRQF_SHARED, + dev->board_name, dev); + if (retval) { + dev_dbg(dev->class_dev, "unable to allocate irq %u\n", + pcidev->irq); + return retval; + } + dev->irq = pcidev->irq; + dev_dbg(dev->class_dev, "irq %u\n", dev->irq); + + retval = setup_subdevices(dev); + if (retval < 0) + return retval; + + return 0; +} + +static void detach(struct comedi_device *dev) +{ + struct pcidas64_private *devpriv = dev->private; + + if (dev->irq) + free_irq(dev->irq, dev); + if (devpriv) { + if (devpriv->plx9080_iobase) { + disable_plx_interrupts(dev); + iounmap(devpriv->plx9080_iobase); + } + if (devpriv->main_iobase) + iounmap(devpriv->main_iobase); + if (dev->mmio) + iounmap(dev->mmio); + } + comedi_pci_disable(dev); + cb_pcidas64_free_dma(dev); +} + +static struct comedi_driver cb_pcidas64_driver = { + .driver_name = "cb_pcidas64", + .module = THIS_MODULE, + .auto_attach = auto_attach, + .detach = detach, +}; + +static int cb_pcidas64_pci_probe(struct pci_dev *dev, + const struct pci_device_id *id) +{ + return comedi_pci_auto_config(dev, &cb_pcidas64_driver, + id->driver_data); +} + +static const struct pci_device_id cb_pcidas64_pci_table[] = { + { PCI_VDEVICE(CB, 0x001d), BOARD_PCIDAS6402_16 }, + { PCI_VDEVICE(CB, 0x001e), BOARD_PCIDAS6402_12 }, + { PCI_VDEVICE(CB, 0x0035), BOARD_PCIDAS64_M1_16 }, + { PCI_VDEVICE(CB, 0x0036), BOARD_PCIDAS64_M2_16 }, + { PCI_VDEVICE(CB, 0x0037), BOARD_PCIDAS64_M3_16 }, + { PCI_VDEVICE(CB, 0x0052), BOARD_PCIDAS4020_12 }, + { PCI_VDEVICE(CB, 0x005d), BOARD_PCIDAS6023 }, + { PCI_VDEVICE(CB, 0x005e), BOARD_PCIDAS6025 }, + { PCI_VDEVICE(CB, 0x005f), BOARD_PCIDAS6030 }, + { PCI_VDEVICE(CB, 0x0060), BOARD_PCIDAS6031 }, + { PCI_VDEVICE(CB, 0x0061), BOARD_PCIDAS6032 }, + { PCI_VDEVICE(CB, 0x0062), BOARD_PCIDAS6033 }, + { PCI_VDEVICE(CB, 0x0063), BOARD_PCIDAS6034 }, + { PCI_VDEVICE(CB, 0x0064), BOARD_PCIDAS6035 }, + { PCI_VDEVICE(CB, 0x0065), BOARD_PCIDAS6040 }, + { PCI_VDEVICE(CB, 0x0066), BOARD_PCIDAS6052 }, + { PCI_VDEVICE(CB, 0x0067), BOARD_PCIDAS6070 }, + { PCI_VDEVICE(CB, 0x0068), BOARD_PCIDAS6071 }, + { PCI_VDEVICE(CB, 0x006f), BOARD_PCIDAS6036 }, + { PCI_VDEVICE(CB, 0x0078), BOARD_PCIDAS6013 }, + { PCI_VDEVICE(CB, 0x0079), BOARD_PCIDAS6014 }, + { 0 } +}; +MODULE_DEVICE_TABLE(pci, cb_pcidas64_pci_table); + +static struct pci_driver cb_pcidas64_pci_driver = { + .name = "cb_pcidas64", + .id_table = cb_pcidas64_pci_table, + .probe = cb_pcidas64_pci_probe, + .remove = comedi_pci_auto_unconfig, +}; +module_comedi_pci_driver(cb_pcidas64_driver, cb_pcidas64_pci_driver); + +MODULE_AUTHOR("Comedi http://www.comedi.org"); +MODULE_DESCRIPTION("Comedi low-level driver"); +MODULE_LICENSE("GPL"); |