diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/dt282x.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/dt282x.c | 1172 |
1 files changed, 0 insertions, 1172 deletions
diff --git a/drivers/staging/comedi/drivers/dt282x.c b/drivers/staging/comedi/drivers/dt282x.c deleted file mode 100644 index 2656b4b0e3d0..000000000000 --- a/drivers/staging/comedi/drivers/dt282x.c +++ /dev/null @@ -1,1172 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * dt282x.c - * Comedi driver for Data Translation DT2821 series - * - * COMEDI - Linux Control and Measurement Device Interface - * Copyright (C) 1997-8 David A. Schleef <ds@schleef.org> - */ - -/* - * Driver: dt282x - * Description: Data Translation DT2821 series (including DT-EZ) - * Author: ds - * Devices: [Data Translation] DT2821 (dt2821), DT2821-F-16SE (dt2821-f), - * DT2821-F-8DI (dt2821-f), DT2821-G-16SE (dt2821-g), - * DT2821-G-8DI (dt2821-g), DT2823 (dt2823), DT2824-PGH (dt2824-pgh), - * DT2824-PGL (dt2824-pgl), DT2825 (dt2825), DT2827 (dt2827), - * DT2828 (dt2828), DT2928 (dt2829), DT21-EZ (dt21-ez), DT23-EZ (dt23-ez), - * DT24-EZ (dt24-ez), DT24-EZ-PGL (dt24-ez-pgl) - * Status: complete - * Updated: Wed, 22 Aug 2001 17:11:34 -0700 - * - * Configuration options: - * [0] - I/O port base address - * [1] - IRQ (optional, required for async command support) - * [2] - DMA 1 (optional, required for async command support) - * [3] - DMA 2 (optional, required for async command support) - * [4] - AI jumpered for 0=single ended, 1=differential - * [5] - AI jumpered for 0=straight binary, 1=2's complement - * [6] - AO 0 data format (deprecated, see below) - * [7] - AO 1 data format (deprecated, see below) - * [8] - AI jumpered for 0=[-10,10]V, 1=[0,10], 2=[-5,5], 3=[0,5] - * [9] - AO channel 0 range (deprecated, see below) - * [10]- AO channel 1 range (deprecated, see below) - * - * Notes: - * - AO commands might be broken. - * - If you try to run a command on both the AI and AO subdevices - * simultaneously, bad things will happen. The driver needs to - * be fixed to check for this situation and return an error. - * - AO range is not programmable. The AO subdevice has a range_table - * containing all the possible analog output ranges. Use the range - * that matches your board configuration to convert between data - * values and physical units. The format of the data written to the - * board is handled automatically based on the unipolar/bipolar - * range that is selected. - */ - -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/gfp.h> -#include <linux/interrupt.h> -#include <linux/io.h> - -#include "../comedidev.h" - -#include "comedi_isadma.h" - -/* - * Register map - */ -#define DT2821_ADCSR_REG 0x00 -#define DT2821_ADCSR_ADERR BIT(15) -#define DT2821_ADCSR_ADCLK BIT(9) -#define DT2821_ADCSR_MUXBUSY BIT(8) -#define DT2821_ADCSR_ADDONE BIT(7) -#define DT2821_ADCSR_IADDONE BIT(6) -#define DT2821_ADCSR_GS(x) (((x) & 0x3) << 4) -#define DT2821_ADCSR_CHAN(x) (((x) & 0xf) << 0) -#define DT2821_CHANCSR_REG 0x02 -#define DT2821_CHANCSR_LLE BIT(15) -#define DT2821_CHANCSR_TO_PRESLA(x) (((x) >> 8) & 0xf) -#define DT2821_CHANCSR_NUMB(x) ((((x) - 1) & 0xf) << 0) -#define DT2821_ADDAT_REG 0x04 -#define DT2821_DACSR_REG 0x06 -#define DT2821_DACSR_DAERR BIT(15) -#define DT2821_DACSR_YSEL(x) ((x) << 9) -#define DT2821_DACSR_SSEL BIT(8) -#define DT2821_DACSR_DACRDY BIT(7) -#define DT2821_DACSR_IDARDY BIT(6) -#define DT2821_DACSR_DACLK BIT(5) -#define DT2821_DACSR_HBOE BIT(1) -#define DT2821_DACSR_LBOE BIT(0) -#define DT2821_DADAT_REG 0x08 -#define DT2821_DIODAT_REG 0x0a -#define DT2821_SUPCSR_REG 0x0c -#define DT2821_SUPCSR_DMAD BIT(15) -#define DT2821_SUPCSR_ERRINTEN BIT(14) -#define DT2821_SUPCSR_CLRDMADNE BIT(13) -#define DT2821_SUPCSR_DDMA BIT(12) -#define DT2821_SUPCSR_DS(x) (((x) & 0x3) << 10) -#define DT2821_SUPCSR_DS_PIO DT2821_SUPCSR_DS(0) -#define DT2821_SUPCSR_DS_AD_CLK DT2821_SUPCSR_DS(1) -#define DT2821_SUPCSR_DS_DA_CLK DT2821_SUPCSR_DS(2) -#define DT2821_SUPCSR_DS_AD_TRIG DT2821_SUPCSR_DS(3) -#define DT2821_SUPCSR_BUFFB BIT(9) -#define DT2821_SUPCSR_SCDN BIT(8) -#define DT2821_SUPCSR_DACON BIT(7) -#define DT2821_SUPCSR_ADCINIT BIT(6) -#define DT2821_SUPCSR_DACINIT BIT(5) -#define DT2821_SUPCSR_PRLD BIT(4) -#define DT2821_SUPCSR_STRIG BIT(3) -#define DT2821_SUPCSR_XTRIG BIT(2) -#define DT2821_SUPCSR_XCLK BIT(1) -#define DT2821_SUPCSR_BDINIT BIT(0) -#define DT2821_TMRCTR_REG 0x0e -#define DT2821_TMRCTR_PRESCALE(x) (((x) & 0xf) << 8) -#define DT2821_TMRCTR_DIVIDER(x) ((255 - ((x) & 0xff)) << 0) - -/* Pacer Clock */ -#define DT2821_OSC_BASE 250 /* 4 MHz (in nanoseconds) */ -#define DT2821_PRESCALE(x) BIT(x) -#define DT2821_PRESCALE_MAX 15 -#define DT2821_DIVIDER_MAX 255 -#define DT2821_OSC_MAX (DT2821_OSC_BASE * \ - DT2821_PRESCALE(DT2821_PRESCALE_MAX) * \ - DT2821_DIVIDER_MAX) - -static const struct comedi_lrange range_dt282x_ai_lo_bipolar = { - 4, { - BIP_RANGE(10), - BIP_RANGE(5), - BIP_RANGE(2.5), - BIP_RANGE(1.25) - } -}; - -static const struct comedi_lrange range_dt282x_ai_lo_unipolar = { - 4, { - UNI_RANGE(10), - UNI_RANGE(5), - UNI_RANGE(2.5), - UNI_RANGE(1.25) - } -}; - -static const struct comedi_lrange range_dt282x_ai_5_bipolar = { - 4, { - BIP_RANGE(5), - BIP_RANGE(2.5), - BIP_RANGE(1.25), - BIP_RANGE(0.625) - } -}; - -static const struct comedi_lrange range_dt282x_ai_5_unipolar = { - 4, { - UNI_RANGE(5), - UNI_RANGE(2.5), - UNI_RANGE(1.25), - UNI_RANGE(0.625) - } -}; - -static const struct comedi_lrange range_dt282x_ai_hi_bipolar = { - 4, { - BIP_RANGE(10), - BIP_RANGE(1), - BIP_RANGE(0.1), - BIP_RANGE(0.02) - } -}; - -static const struct comedi_lrange range_dt282x_ai_hi_unipolar = { - 4, { - UNI_RANGE(10), - UNI_RANGE(1), - UNI_RANGE(0.1), - UNI_RANGE(0.02) - } -}; - -/* - * The Analog Output range is set per-channel using jumpers on the board. - * All of these ranges may not be available on some DT2821 series boards. - * The default jumper setting has both channels set for +/-10V output. - */ -static const struct comedi_lrange dt282x_ao_range = { - 5, { - BIP_RANGE(10), - BIP_RANGE(5), - BIP_RANGE(2.5), - UNI_RANGE(10), - UNI_RANGE(5), - } -}; - -struct dt282x_board { - const char *name; - unsigned int ai_maxdata; - int adchan_se; - int adchan_di; - int ai_speed; - int ispgl; - int dachan; - unsigned int ao_maxdata; -}; - -static const struct dt282x_board boardtypes[] = { - { - .name = "dt2821", - .ai_maxdata = 0x0fff, - .adchan_se = 16, - .adchan_di = 8, - .ai_speed = 20000, - .dachan = 2, - .ao_maxdata = 0x0fff, - }, { - .name = "dt2821-f", - .ai_maxdata = 0x0fff, - .adchan_se = 16, - .adchan_di = 8, - .ai_speed = 6500, - .dachan = 2, - .ao_maxdata = 0x0fff, - }, { - .name = "dt2821-g", - .ai_maxdata = 0x0fff, - .adchan_se = 16, - .adchan_di = 8, - .ai_speed = 4000, - .dachan = 2, - .ao_maxdata = 0x0fff, - }, { - .name = "dt2823", - .ai_maxdata = 0xffff, - .adchan_di = 4, - .ai_speed = 10000, - .dachan = 2, - .ao_maxdata = 0xffff, - }, { - .name = "dt2824-pgh", - .ai_maxdata = 0x0fff, - .adchan_se = 16, - .adchan_di = 8, - .ai_speed = 20000, - }, { - .name = "dt2824-pgl", - .ai_maxdata = 0x0fff, - .adchan_se = 16, - .adchan_di = 8, - .ai_speed = 20000, - .ispgl = 1, - }, { - .name = "dt2825", - .ai_maxdata = 0x0fff, - .adchan_se = 16, - .adchan_di = 8, - .ai_speed = 20000, - .ispgl = 1, - .dachan = 2, - .ao_maxdata = 0x0fff, - }, { - .name = "dt2827", - .ai_maxdata = 0xffff, - .adchan_di = 4, - .ai_speed = 10000, - .dachan = 2, - .ao_maxdata = 0x0fff, - }, { - .name = "dt2828", - .ai_maxdata = 0x0fff, - .adchan_se = 4, - .ai_speed = 10000, - .dachan = 2, - .ao_maxdata = 0x0fff, - }, { - .name = "dt2829", - .ai_maxdata = 0xffff, - .adchan_se = 8, - .ai_speed = 33250, - .dachan = 2, - .ao_maxdata = 0xffff, - }, { - .name = "dt21-ez", - .ai_maxdata = 0x0fff, - .adchan_se = 16, - .adchan_di = 8, - .ai_speed = 10000, - .dachan = 2, - .ao_maxdata = 0x0fff, - }, { - .name = "dt23-ez", - .ai_maxdata = 0xffff, - .adchan_se = 16, - .adchan_di = 8, - .ai_speed = 10000, - }, { - .name = "dt24-ez", - .ai_maxdata = 0x0fff, - .adchan_se = 16, - .adchan_di = 8, - .ai_speed = 10000, - }, { - .name = "dt24-ez-pgl", - .ai_maxdata = 0x0fff, - .adchan_se = 16, - .adchan_di = 8, - .ai_speed = 10000, - .ispgl = 1, - }, -}; - -struct dt282x_private { - struct comedi_isadma *dma; - unsigned int ad_2scomp:1; - unsigned int divisor; - int dacsr; /* software copies of registers */ - int adcsr; - int supcsr; - int ntrig; - int nread; - int dma_dir; -}; - -static int dt282x_prep_ai_dma(struct comedi_device *dev, int dma_index, int n) -{ - struct dt282x_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_isadma_desc *desc = &dma->desc[dma_index]; - - if (!devpriv->ntrig) - return 0; - - if (n == 0) - n = desc->maxsize; - if (n > devpriv->ntrig * 2) - n = devpriv->ntrig * 2; - devpriv->ntrig -= n / 2; - - desc->size = n; - comedi_isadma_set_mode(desc, devpriv->dma_dir); - - comedi_isadma_program(desc); - - return n; -} - -static int dt282x_prep_ao_dma(struct comedi_device *dev, int dma_index, int n) -{ - struct dt282x_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_isadma_desc *desc = &dma->desc[dma_index]; - - desc->size = n; - comedi_isadma_set_mode(desc, devpriv->dma_dir); - - comedi_isadma_program(desc); - - return n; -} - -static void dt282x_disable_dma(struct comedi_device *dev) -{ - struct dt282x_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_isadma_desc *desc; - int i; - - for (i = 0; i < 2; i++) { - desc = &dma->desc[i]; - comedi_isadma_disable(desc->chan); - } -} - -static unsigned int dt282x_ns_to_timer(unsigned int *ns, unsigned int flags) -{ - unsigned int prescale, base, divider; - - for (prescale = 0; prescale <= DT2821_PRESCALE_MAX; prescale++) { - if (prescale == 1) /* 0 and 1 are both divide by 1 */ - continue; - base = DT2821_OSC_BASE * DT2821_PRESCALE(prescale); - switch (flags & CMDF_ROUND_MASK) { - case CMDF_ROUND_NEAREST: - default: - divider = DIV_ROUND_CLOSEST(*ns, base); - break; - case CMDF_ROUND_DOWN: - divider = (*ns) / base; - break; - case CMDF_ROUND_UP: - divider = DIV_ROUND_UP(*ns, base); - break; - } - if (divider <= DT2821_DIVIDER_MAX) - break; - } - if (divider > DT2821_DIVIDER_MAX) { - prescale = DT2821_PRESCALE_MAX; - divider = DT2821_DIVIDER_MAX; - base = DT2821_OSC_BASE * DT2821_PRESCALE(prescale); - } - *ns = divider * base; - return DT2821_TMRCTR_PRESCALE(prescale) | - DT2821_TMRCTR_DIVIDER(divider); -} - -static void dt282x_munge(struct comedi_device *dev, - struct comedi_subdevice *s, - unsigned short *buf, - unsigned int nbytes) -{ - struct dt282x_private *devpriv = dev->private; - unsigned int val; - int i; - - if (nbytes % 2) - dev_err(dev->class_dev, - "bug! odd number of bytes from dma xfer\n"); - - for (i = 0; i < nbytes / 2; i++) { - val = buf[i]; - val &= s->maxdata; - if (devpriv->ad_2scomp) - val = comedi_offset_munge(s, val); - - buf[i] = val; - } -} - -static unsigned int dt282x_ao_setup_dma(struct comedi_device *dev, - struct comedi_subdevice *s, - int cur_dma) -{ - struct dt282x_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_isadma_desc *desc = &dma->desc[cur_dma]; - unsigned int nsamples = comedi_bytes_to_samples(s, desc->maxsize); - unsigned int nbytes; - - nbytes = comedi_buf_read_samples(s, desc->virt_addr, nsamples); - if (nbytes) - dt282x_prep_ao_dma(dev, cur_dma, nbytes); - else - dev_err(dev->class_dev, "AO underrun\n"); - - return nbytes; -} - -static void dt282x_ao_dma_interrupt(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct dt282x_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma]; - - outw(devpriv->supcsr | DT2821_SUPCSR_CLRDMADNE, - dev->iobase + DT2821_SUPCSR_REG); - - comedi_isadma_disable(desc->chan); - - if (!dt282x_ao_setup_dma(dev, s, dma->cur_dma)) - s->async->events |= COMEDI_CB_OVERFLOW; - - dma->cur_dma = 1 - dma->cur_dma; -} - -static void dt282x_ai_dma_interrupt(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct dt282x_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma]; - unsigned int nsamples = comedi_bytes_to_samples(s, desc->size); - int ret; - - outw(devpriv->supcsr | DT2821_SUPCSR_CLRDMADNE, - dev->iobase + DT2821_SUPCSR_REG); - - comedi_isadma_disable(desc->chan); - - dt282x_munge(dev, s, desc->virt_addr, desc->size); - ret = comedi_buf_write_samples(s, desc->virt_addr, nsamples); - if (ret != desc->size) - return; - - devpriv->nread -= nsamples; - if (devpriv->nread < 0) { - dev_info(dev->class_dev, "nread off by one\n"); - devpriv->nread = 0; - } - if (!devpriv->nread) { - s->async->events |= COMEDI_CB_EOA; - return; - } - - /* restart the channel */ - dt282x_prep_ai_dma(dev, dma->cur_dma, 0); - - dma->cur_dma = 1 - dma->cur_dma; -} - -static irqreturn_t dt282x_interrupt(int irq, void *d) -{ - struct comedi_device *dev = d; - struct dt282x_private *devpriv = dev->private; - struct comedi_subdevice *s = dev->read_subdev; - struct comedi_subdevice *s_ao = dev->write_subdev; - unsigned int supcsr, adcsr, dacsr; - int handled = 0; - - if (!dev->attached) { - dev_err(dev->class_dev, "spurious interrupt\n"); - return IRQ_HANDLED; - } - - adcsr = inw(dev->iobase + DT2821_ADCSR_REG); - dacsr = inw(dev->iobase + DT2821_DACSR_REG); - supcsr = inw(dev->iobase + DT2821_SUPCSR_REG); - if (supcsr & DT2821_SUPCSR_DMAD) { - if (devpriv->dma_dir == COMEDI_ISADMA_READ) - dt282x_ai_dma_interrupt(dev, s); - else - dt282x_ao_dma_interrupt(dev, s_ao); - handled = 1; - } - if (adcsr & DT2821_ADCSR_ADERR) { - if (devpriv->nread != 0) { - dev_err(dev->class_dev, "A/D error\n"); - s->async->events |= COMEDI_CB_ERROR; - } - handled = 1; - } - if (dacsr & DT2821_DACSR_DAERR) { - dev_err(dev->class_dev, "D/A error\n"); - s_ao->async->events |= COMEDI_CB_ERROR; - handled = 1; - } - - comedi_handle_events(dev, s); - if (s_ao) - comedi_handle_events(dev, s_ao); - - return IRQ_RETVAL(handled); -} - -static void dt282x_load_changain(struct comedi_device *dev, int n, - unsigned int *chanlist) -{ - struct dt282x_private *devpriv = dev->private; - int i; - - outw(DT2821_CHANCSR_LLE | DT2821_CHANCSR_NUMB(n), - dev->iobase + DT2821_CHANCSR_REG); - for (i = 0; i < n; i++) { - unsigned int chan = CR_CHAN(chanlist[i]); - unsigned int range = CR_RANGE(chanlist[i]); - - outw(devpriv->adcsr | - DT2821_ADCSR_GS(range) | - DT2821_ADCSR_CHAN(chan), - dev->iobase + DT2821_ADCSR_REG); - } - outw(DT2821_CHANCSR_NUMB(n), dev->iobase + DT2821_CHANCSR_REG); -} - -static int dt282x_ai_timeout(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned long context) -{ - unsigned int status; - - status = inw(dev->iobase + DT2821_ADCSR_REG); - switch (context) { - case DT2821_ADCSR_MUXBUSY: - if ((status & DT2821_ADCSR_MUXBUSY) == 0) - return 0; - break; - case DT2821_ADCSR_ADDONE: - if (status & DT2821_ADCSR_ADDONE) - return 0; - break; - default: - return -EINVAL; - } - return -EBUSY; -} - -/* - * Performs a single A/D conversion. - * - Put channel/gain into channel-gain list - * - preload multiplexer - * - trigger conversion and wait for it to finish - */ -static int dt282x_ai_insn_read(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - struct dt282x_private *devpriv = dev->private; - unsigned int val; - int ret; - int i; - - /* XXX should we really be enabling the ad clock here? */ - devpriv->adcsr = DT2821_ADCSR_ADCLK; - outw(devpriv->adcsr, dev->iobase + DT2821_ADCSR_REG); - - dt282x_load_changain(dev, 1, &insn->chanspec); - - outw(devpriv->supcsr | DT2821_SUPCSR_PRLD, - dev->iobase + DT2821_SUPCSR_REG); - ret = comedi_timeout(dev, s, insn, - dt282x_ai_timeout, DT2821_ADCSR_MUXBUSY); - if (ret) - return ret; - - for (i = 0; i < insn->n; i++) { - outw(devpriv->supcsr | DT2821_SUPCSR_STRIG, - dev->iobase + DT2821_SUPCSR_REG); - - ret = comedi_timeout(dev, s, insn, - dt282x_ai_timeout, DT2821_ADCSR_ADDONE); - if (ret) - return ret; - - val = inw(dev->iobase + DT2821_ADDAT_REG); - val &= s->maxdata; - if (devpriv->ad_2scomp) - val = comedi_offset_munge(s, val); - - data[i] = val; - } - - return i; -} - -static int dt282x_ai_cmdtest(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_cmd *cmd) -{ - const struct dt282x_board *board = dev->board_ptr; - struct dt282x_private *devpriv = dev->private; - int err = 0; - unsigned int arg; - - /* Step 1 : check if triggers are trivially valid */ - - err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW); - err |= comedi_check_trigger_src(&cmd->scan_begin_src, - TRIG_FOLLOW | TRIG_EXT); - err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_TIMER); - err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT); - err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE); - - if (err) - return 1; - - /* Step 2a : make sure trigger sources are unique */ - - err |= comedi_check_trigger_is_unique(cmd->scan_begin_src); - err |= comedi_check_trigger_is_unique(cmd->stop_src); - - /* Step 2b : and mutually compatible */ - - if (err) - return 2; - - /* Step 3: check if arguments are trivially valid */ - - err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0); - err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0); - err |= comedi_check_trigger_arg_max(&cmd->convert_arg, DT2821_OSC_MAX); - err |= comedi_check_trigger_arg_min(&cmd->convert_arg, board->ai_speed); - err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, - cmd->chanlist_len); - - if (cmd->stop_src == TRIG_COUNT) - err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1); - else /* TRIG_EXT | TRIG_NONE */ - err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); - - if (err) - return 3; - - /* step 4: fix up any arguments */ - - arg = cmd->convert_arg; - devpriv->divisor = dt282x_ns_to_timer(&arg, cmd->flags); - err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg); - - if (err) - return 4; - - return 0; -} - -static int dt282x_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) -{ - struct dt282x_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_cmd *cmd = &s->async->cmd; - int ret; - - dt282x_disable_dma(dev); - - outw(devpriv->divisor, dev->iobase + DT2821_TMRCTR_REG); - - devpriv->supcsr = DT2821_SUPCSR_ERRINTEN; - if (cmd->scan_begin_src == TRIG_FOLLOW) - devpriv->supcsr = DT2821_SUPCSR_DS_AD_CLK; - else - devpriv->supcsr = DT2821_SUPCSR_DS_AD_TRIG; - outw(devpriv->supcsr | - DT2821_SUPCSR_CLRDMADNE | - DT2821_SUPCSR_BUFFB | - DT2821_SUPCSR_ADCINIT, - dev->iobase + DT2821_SUPCSR_REG); - - devpriv->ntrig = cmd->stop_arg * cmd->scan_end_arg; - devpriv->nread = devpriv->ntrig; - - devpriv->dma_dir = COMEDI_ISADMA_READ; - dma->cur_dma = 0; - dt282x_prep_ai_dma(dev, 0, 0); - if (devpriv->ntrig) { - dt282x_prep_ai_dma(dev, 1, 0); - devpriv->supcsr |= DT2821_SUPCSR_DDMA; - outw(devpriv->supcsr, dev->iobase + DT2821_SUPCSR_REG); - } - - devpriv->adcsr = 0; - - dt282x_load_changain(dev, cmd->chanlist_len, cmd->chanlist); - - devpriv->adcsr = DT2821_ADCSR_ADCLK | DT2821_ADCSR_IADDONE; - outw(devpriv->adcsr, dev->iobase + DT2821_ADCSR_REG); - - outw(devpriv->supcsr | DT2821_SUPCSR_PRLD, - dev->iobase + DT2821_SUPCSR_REG); - ret = comedi_timeout(dev, s, NULL, - dt282x_ai_timeout, DT2821_ADCSR_MUXBUSY); - if (ret) - return ret; - - if (cmd->scan_begin_src == TRIG_FOLLOW) { - outw(devpriv->supcsr | DT2821_SUPCSR_STRIG, - dev->iobase + DT2821_SUPCSR_REG); - } else { - devpriv->supcsr |= DT2821_SUPCSR_XTRIG; - outw(devpriv->supcsr, dev->iobase + DT2821_SUPCSR_REG); - } - - return 0; -} - -static int dt282x_ai_cancel(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct dt282x_private *devpriv = dev->private; - - dt282x_disable_dma(dev); - - devpriv->adcsr = 0; - outw(devpriv->adcsr, dev->iobase + DT2821_ADCSR_REG); - - devpriv->supcsr = 0; - outw(devpriv->supcsr | DT2821_SUPCSR_ADCINIT, - dev->iobase + DT2821_SUPCSR_REG); - - return 0; -} - -static int dt282x_ao_insn_write(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - struct dt282x_private *devpriv = dev->private; - unsigned int chan = CR_CHAN(insn->chanspec); - unsigned int range = CR_RANGE(insn->chanspec); - int i; - - devpriv->dacsr |= DT2821_DACSR_SSEL | DT2821_DACSR_YSEL(chan); - - for (i = 0; i < insn->n; i++) { - unsigned int val = data[i]; - - s->readback[chan] = val; - - if (comedi_range_is_bipolar(s, range)) - val = comedi_offset_munge(s, val); - - outw(devpriv->dacsr, dev->iobase + DT2821_DACSR_REG); - - outw(val, dev->iobase + DT2821_DADAT_REG); - - outw(devpriv->supcsr | DT2821_SUPCSR_DACON, - dev->iobase + DT2821_SUPCSR_REG); - } - - return insn->n; -} - -static int dt282x_ao_cmdtest(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_cmd *cmd) -{ - struct dt282x_private *devpriv = dev->private; - int err = 0; - unsigned int arg; - - /* Step 1 : check if triggers are trivially valid */ - - err |= comedi_check_trigger_src(&cmd->start_src, TRIG_INT); - err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER); - 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_COUNT | TRIG_NONE); - - if (err) - return 1; - - /* Step 2a : make sure trigger sources are unique */ - - err |= comedi_check_trigger_is_unique(cmd->stop_src); - - /* Step 2b : and mutually compatible */ - - if (err) - return 2; - - /* Step 3: check if arguments are trivially valid */ - - err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0); - err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg, 5000); - err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0); - err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, - cmd->chanlist_len); - - if (cmd->stop_src == TRIG_COUNT) - err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1); - else /* TRIG_EXT | TRIG_NONE */ - err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); - - if (err) - return 3; - - /* step 4: fix up any arguments */ - - arg = cmd->scan_begin_arg; - devpriv->divisor = dt282x_ns_to_timer(&arg, cmd->flags); - err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg); - - if (err) - return 4; - - return 0; -} - -static int dt282x_ao_inttrig(struct comedi_device *dev, - struct comedi_subdevice *s, - unsigned int trig_num) -{ - struct dt282x_private *devpriv = dev->private; - struct comedi_cmd *cmd = &s->async->cmd; - - if (trig_num != cmd->start_src) - return -EINVAL; - - if (!dt282x_ao_setup_dma(dev, s, 0)) - return -EPIPE; - - if (!dt282x_ao_setup_dma(dev, s, 1)) - return -EPIPE; - - outw(devpriv->supcsr | DT2821_SUPCSR_STRIG, - dev->iobase + DT2821_SUPCSR_REG); - s->async->inttrig = NULL; - - return 1; -} - -static int dt282x_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s) -{ - struct dt282x_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_cmd *cmd = &s->async->cmd; - - dt282x_disable_dma(dev); - - devpriv->supcsr = DT2821_SUPCSR_ERRINTEN | - DT2821_SUPCSR_DS_DA_CLK | - DT2821_SUPCSR_DDMA; - outw(devpriv->supcsr | - DT2821_SUPCSR_CLRDMADNE | - DT2821_SUPCSR_BUFFB | - DT2821_SUPCSR_DACINIT, - dev->iobase + DT2821_SUPCSR_REG); - - devpriv->ntrig = cmd->stop_arg * cmd->chanlist_len; - devpriv->nread = devpriv->ntrig; - - devpriv->dma_dir = COMEDI_ISADMA_WRITE; - dma->cur_dma = 0; - - outw(devpriv->divisor, dev->iobase + DT2821_TMRCTR_REG); - - /* clear all bits but the DIO direction bits */ - devpriv->dacsr &= (DT2821_DACSR_LBOE | DT2821_DACSR_HBOE); - - devpriv->dacsr |= (DT2821_DACSR_SSEL | - DT2821_DACSR_DACLK | - DT2821_DACSR_IDARDY); - outw(devpriv->dacsr, dev->iobase + DT2821_DACSR_REG); - - s->async->inttrig = dt282x_ao_inttrig; - - return 0; -} - -static int dt282x_ao_cancel(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct dt282x_private *devpriv = dev->private; - - dt282x_disable_dma(dev); - - /* clear all bits but the DIO direction bits */ - devpriv->dacsr &= (DT2821_DACSR_LBOE | DT2821_DACSR_HBOE); - - outw(devpriv->dacsr, dev->iobase + DT2821_DACSR_REG); - - devpriv->supcsr = 0; - outw(devpriv->supcsr | DT2821_SUPCSR_DACINIT, - dev->iobase + DT2821_SUPCSR_REG); - - return 0; -} - -static int dt282x_dio_insn_bits(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - if (comedi_dio_update_state(s, data)) - outw(s->state, dev->iobase + DT2821_DIODAT_REG); - - data[1] = inw(dev->iobase + DT2821_DIODAT_REG); - - return insn->n; -} - -static int dt282x_dio_insn_config(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - struct dt282x_private *devpriv = dev->private; - unsigned int chan = CR_CHAN(insn->chanspec); - unsigned int mask; - int ret; - - if (chan < 8) - mask = 0x00ff; - else - mask = 0xff00; - - ret = comedi_dio_insn_config(dev, s, insn, data, mask); - if (ret) - return ret; - - devpriv->dacsr &= ~(DT2821_DACSR_LBOE | DT2821_DACSR_HBOE); - if (s->io_bits & 0x00ff) - devpriv->dacsr |= DT2821_DACSR_LBOE; - if (s->io_bits & 0xff00) - devpriv->dacsr |= DT2821_DACSR_HBOE; - - outw(devpriv->dacsr, dev->iobase + DT2821_DACSR_REG); - - return insn->n; -} - -static const struct comedi_lrange *const ai_range_table[] = { - &range_dt282x_ai_lo_bipolar, - &range_dt282x_ai_lo_unipolar, - &range_dt282x_ai_5_bipolar, - &range_dt282x_ai_5_unipolar -}; - -static const struct comedi_lrange *const ai_range_pgl_table[] = { - &range_dt282x_ai_hi_bipolar, - &range_dt282x_ai_hi_unipolar -}; - -static const struct comedi_lrange *opt_ai_range_lkup(int ispgl, int x) -{ - if (ispgl) { - if (x < 0 || x >= 2) - x = 0; - return ai_range_pgl_table[x]; - } - - if (x < 0 || x >= 4) - x = 0; - return ai_range_table[x]; -} - -static void dt282x_alloc_dma(struct comedi_device *dev, - struct comedi_devconfig *it) -{ - struct dt282x_private *devpriv = dev->private; - unsigned int irq_num = it->options[1]; - unsigned int dma_chan[2]; - - if (it->options[2] < it->options[3]) { - dma_chan[0] = it->options[2]; - dma_chan[1] = it->options[3]; - } else { - dma_chan[0] = it->options[3]; - dma_chan[1] = it->options[2]; - } - - if (!irq_num || dma_chan[0] == dma_chan[1] || - dma_chan[0] < 5 || dma_chan[0] > 7 || - dma_chan[1] < 5 || dma_chan[1] > 7) - return; - - if (request_irq(irq_num, dt282x_interrupt, 0, dev->board_name, dev)) - return; - - /* DMA uses two 4K buffers with separate DMA channels */ - devpriv->dma = comedi_isadma_alloc(dev, 2, dma_chan[0], dma_chan[1], - PAGE_SIZE, 0); - if (!devpriv->dma) - free_irq(irq_num, dev); - else - dev->irq = irq_num; -} - -static void dt282x_free_dma(struct comedi_device *dev) -{ - struct dt282x_private *devpriv = dev->private; - - if (devpriv) - comedi_isadma_free(devpriv->dma); -} - -static int dt282x_initialize(struct comedi_device *dev) -{ - /* Initialize board */ - outw(DT2821_SUPCSR_BDINIT, dev->iobase + DT2821_SUPCSR_REG); - inw(dev->iobase + DT2821_ADCSR_REG); - - /* - * At power up, some registers are in a well-known state. - * Check them to see if a DT2821 series board is present. - */ - if (((inw(dev->iobase + DT2821_ADCSR_REG) & 0xfff0) != 0x7c00) || - ((inw(dev->iobase + DT2821_CHANCSR_REG) & 0xf0f0) != 0x70f0) || - ((inw(dev->iobase + DT2821_DACSR_REG) & 0x7c93) != 0x7c90) || - ((inw(dev->iobase + DT2821_SUPCSR_REG) & 0xf8ff) != 0x0000) || - ((inw(dev->iobase + DT2821_TMRCTR_REG) & 0xff00) != 0xf000)) { - dev_err(dev->class_dev, "board not found\n"); - return -EIO; - } - return 0; -} - -static int dt282x_attach(struct comedi_device *dev, struct comedi_devconfig *it) -{ - const struct dt282x_board *board = dev->board_ptr; - struct dt282x_private *devpriv; - struct comedi_subdevice *s; - int ret; - - ret = comedi_request_region(dev, it->options[0], 0x10); - if (ret) - return ret; - - ret = dt282x_initialize(dev); - if (ret) - return ret; - - devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); - if (!devpriv) - return -ENOMEM; - - /* an IRQ and 2 DMA channels are required for async command support */ - dt282x_alloc_dma(dev, it); - - ret = comedi_alloc_subdevices(dev, 3); - if (ret) - return ret; - - /* Analog Input subdevice */ - s = &dev->subdevices[0]; - s->type = COMEDI_SUBD_AI; - s->subdev_flags = SDF_READABLE; - if ((it->options[4] && board->adchan_di) || board->adchan_se == 0) { - s->subdev_flags |= SDF_DIFF; - s->n_chan = board->adchan_di; - } else { - s->subdev_flags |= SDF_COMMON; - s->n_chan = board->adchan_se; - } - s->maxdata = board->ai_maxdata; - - s->range_table = opt_ai_range_lkup(board->ispgl, it->options[8]); - devpriv->ad_2scomp = it->options[5] ? 1 : 0; - - s->insn_read = dt282x_ai_insn_read; - if (dev->irq) { - dev->read_subdev = s; - s->subdev_flags |= SDF_CMD_READ; - s->len_chanlist = s->n_chan; - s->do_cmdtest = dt282x_ai_cmdtest; - s->do_cmd = dt282x_ai_cmd; - s->cancel = dt282x_ai_cancel; - } - - /* Analog Output subdevice */ - s = &dev->subdevices[1]; - if (board->dachan) { - s->type = COMEDI_SUBD_AO; - s->subdev_flags = SDF_WRITABLE; - s->n_chan = board->dachan; - s->maxdata = board->ao_maxdata; - /* ranges are per-channel, set by jumpers on the board */ - s->range_table = &dt282x_ao_range; - s->insn_write = dt282x_ao_insn_write; - if (dev->irq) { - dev->write_subdev = s; - s->subdev_flags |= SDF_CMD_WRITE; - s->len_chanlist = s->n_chan; - s->do_cmdtest = dt282x_ao_cmdtest; - s->do_cmd = dt282x_ao_cmd; - s->cancel = dt282x_ao_cancel; - } - - ret = comedi_alloc_subdev_readback(s); - if (ret) - return ret; - } else { - s->type = COMEDI_SUBD_UNUSED; - } - - /* Digital I/O subdevice */ - s = &dev->subdevices[2]; - s->type = COMEDI_SUBD_DIO; - s->subdev_flags = SDF_READABLE | SDF_WRITABLE; - s->n_chan = 16; - s->maxdata = 1; - s->range_table = &range_digital; - s->insn_bits = dt282x_dio_insn_bits; - s->insn_config = dt282x_dio_insn_config; - - return 0; -} - -static void dt282x_detach(struct comedi_device *dev) -{ - dt282x_free_dma(dev); - comedi_legacy_detach(dev); -} - -static struct comedi_driver dt282x_driver = { - .driver_name = "dt282x", - .module = THIS_MODULE, - .attach = dt282x_attach, - .detach = dt282x_detach, - .board_name = &boardtypes[0].name, - .num_names = ARRAY_SIZE(boardtypes), - .offset = sizeof(struct dt282x_board), -}; -module_comedi_driver(dt282x_driver); - -MODULE_AUTHOR("Comedi https://www.comedi.org"); -MODULE_DESCRIPTION("Comedi driver for Data Translation DT2821 series"); -MODULE_LICENSE("GPL"); |