diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/pcmmio.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/pcmmio.c | 777 |
1 files changed, 0 insertions, 777 deletions
diff --git a/drivers/staging/comedi/drivers/pcmmio.c b/drivers/staging/comedi/drivers/pcmmio.c deleted file mode 100644 index 24a9568d3378..000000000000 --- a/drivers/staging/comedi/drivers/pcmmio.c +++ /dev/null @@ -1,777 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * pcmmio.c - * Driver for Winsystems PC-104 based multifunction IO board. - * - * COMEDI - Linux Control and Measurement Device Interface - * Copyright (C) 2007 Calin A. Culianu <calin@ajvar.org> - */ - -/* - * Driver: pcmmio - * Description: A driver for the PCM-MIO multifunction board - * Devices: [Winsystems] PCM-MIO (pcmmio) - * Author: Calin Culianu <calin@ajvar.org> - * Updated: Wed, May 16 2007 16:21:10 -0500 - * Status: works - * - * A driver for the PCM-MIO multifunction board from Winsystems. This - * is a PC-104 based I/O board. It contains four subdevices: - * - * subdevice 0 - 16 channels of 16-bit AI - * subdevice 1 - 8 channels of 16-bit AO - * subdevice 2 - first 24 channels of the 48 channel of DIO - * (with edge-triggered interrupt support) - * subdevice 3 - last 24 channels of the 48 channel DIO - * (no interrupt support for this bank of channels) - * - * Some notes: - * - * Synchronous reads and writes are the only things implemented for analog - * input and output. The hardware itself can do streaming acquisition, etc. - * - * Asynchronous I/O for the DIO subdevices *is* implemented, however! They - * are basically edge-triggered interrupts for any configuration of the - * channels in subdevice 2. - * - * Also note that this interrupt support is untested. - * - * A few words about edge-detection IRQ support (commands on DIO): - * - * To use edge-detection IRQ support for the DIO subdevice, pass the IRQ - * of the board to the comedi_config command. The board IRQ is not jumpered - * but rather configured through software, so any IRQ from 1-15 is OK. - * - * Due to the genericity of the comedi API, you need to create a special - * comedi_command in order to use edge-triggered interrupts for DIO. - * - * Use comedi_commands with TRIG_NOW. Your callback will be called each - * time an edge is detected on the specified DIO line(s), and the data - * values will be two sample_t's, which should be concatenated to form - * one 32-bit unsigned int. This value is the mask of channels that had - * edges detected from your channel list. Note that the bits positions - * in the mask correspond to positions in your chanlist when you - * specified the command and *not* channel id's! - * - * To set the polarity of the edge-detection interrupts pass a nonzero value - * for either CR_RANGE or CR_AREF for edge-up polarity, or a zero - * value for both CR_RANGE and CR_AREF if you want edge-down polarity. - * - * Configuration Options: - * [0] - I/O port base address - * [1] - IRQ (optional -- for edge-detect interrupt support only, - * leave out if you don't need this feature) - */ - -#include <linux/module.h> -#include <linux/interrupt.h> -#include <linux/slab.h> - -#include "../comedidev.h" - -/* - * Register I/O map - */ -#define PCMMIO_AI_LSB_REG 0x00 -#define PCMMIO_AI_MSB_REG 0x01 -#define PCMMIO_AI_CMD_REG 0x02 -#define PCMMIO_AI_CMD_SE BIT(7) -#define PCMMIO_AI_CMD_ODD_CHAN BIT(6) -#define PCMMIO_AI_CMD_CHAN_SEL(x) (((x) & 0x3) << 4) -#define PCMMIO_AI_CMD_RANGE(x) (((x) & 0x3) << 2) -#define PCMMIO_RESOURCE_REG 0x02 -#define PCMMIO_RESOURCE_IRQ(x) (((x) & 0xf) << 0) -#define PCMMIO_AI_STATUS_REG 0x03 -#define PCMMIO_AI_STATUS_DATA_READY BIT(7) -#define PCMMIO_AI_STATUS_DATA_DMA_PEND BIT(6) -#define PCMMIO_AI_STATUS_CMD_DMA_PEND BIT(5) -#define PCMMIO_AI_STATUS_IRQ_PEND BIT(4) -#define PCMMIO_AI_STATUS_DATA_DRQ_ENA BIT(2) -#define PCMMIO_AI_STATUS_REG_SEL BIT(3) -#define PCMMIO_AI_STATUS_CMD_DRQ_ENA BIT(1) -#define PCMMIO_AI_STATUS_IRQ_ENA BIT(0) -#define PCMMIO_AI_RES_ENA_REG 0x03 -#define PCMMIO_AI_RES_ENA_CMD_REG_ACCESS (0 << 3) -#define PCMMIO_AI_RES_ENA_AI_RES_ACCESS BIT(3) -#define PCMMIO_AI_RES_ENA_DIO_RES_ACCESS BIT(4) -#define PCMMIO_AI_2ND_ADC_OFFSET 0x04 - -#define PCMMIO_AO_LSB_REG 0x08 -#define PCMMIO_AO_LSB_SPAN(x) (((x) & 0xf) << 0) -#define PCMMIO_AO_MSB_REG 0x09 -#define PCMMIO_AO_CMD_REG 0x0a -#define PCMMIO_AO_CMD_WR_SPAN (0x2 << 4) -#define PCMMIO_AO_CMD_WR_CODE (0x3 << 4) -#define PCMMIO_AO_CMD_UPDATE (0x4 << 4) -#define PCMMIO_AO_CMD_UPDATE_ALL (0x5 << 4) -#define PCMMIO_AO_CMD_WR_SPAN_UPDATE (0x6 << 4) -#define PCMMIO_AO_CMD_WR_CODE_UPDATE (0x7 << 4) -#define PCMMIO_AO_CMD_WR_SPAN_UPDATE_ALL (0x8 << 4) -#define PCMMIO_AO_CMD_WR_CODE_UPDATE_ALL (0x9 << 4) -#define PCMMIO_AO_CMD_RD_B1_SPAN (0xa << 4) -#define PCMMIO_AO_CMD_RD_B1_CODE (0xb << 4) -#define PCMMIO_AO_CMD_RD_B2_SPAN (0xc << 4) -#define PCMMIO_AO_CMD_RD_B2_CODE (0xd << 4) -#define PCMMIO_AO_CMD_NOP (0xf << 4) -#define PCMMIO_AO_CMD_CHAN_SEL(x) (((x) & 0x03) << 1) -#define PCMMIO_AO_CMD_CHAN_SEL_ALL (0x0f << 0) -#define PCMMIO_AO_STATUS_REG 0x0b -#define PCMMIO_AO_STATUS_DATA_READY BIT(7) -#define PCMMIO_AO_STATUS_DATA_DMA_PEND BIT(6) -#define PCMMIO_AO_STATUS_CMD_DMA_PEND BIT(5) -#define PCMMIO_AO_STATUS_IRQ_PEND BIT(4) -#define PCMMIO_AO_STATUS_DATA_DRQ_ENA BIT(2) -#define PCMMIO_AO_STATUS_REG_SEL BIT(3) -#define PCMMIO_AO_STATUS_CMD_DRQ_ENA BIT(1) -#define PCMMIO_AO_STATUS_IRQ_ENA BIT(0) -#define PCMMIO_AO_RESOURCE_ENA_REG 0x0b -#define PCMMIO_AO_2ND_DAC_OFFSET 0x04 - -/* - * WinSystems WS16C48 - * - * Offset Page 0 Page 1 Page 2 Page 3 - * ------ ----------- ----------- ----------- ----------- - * 0x10 Port 0 I/O Port 0 I/O Port 0 I/O Port 0 I/O - * 0x11 Port 1 I/O Port 1 I/O Port 1 I/O Port 1 I/O - * 0x12 Port 2 I/O Port 2 I/O Port 2 I/O Port 2 I/O - * 0x13 Port 3 I/O Port 3 I/O Port 3 I/O Port 3 I/O - * 0x14 Port 4 I/O Port 4 I/O Port 4 I/O Port 4 I/O - * 0x15 Port 5 I/O Port 5 I/O Port 5 I/O Port 5 I/O - * 0x16 INT_PENDING INT_PENDING INT_PENDING INT_PENDING - * 0x17 Page/Lock Page/Lock Page/Lock Page/Lock - * 0x18 N/A POL_0 ENAB_0 INT_ID0 - * 0x19 N/A POL_1 ENAB_1 INT_ID1 - * 0x1a N/A POL_2 ENAB_2 INT_ID2 - */ -#define PCMMIO_PORT_REG(x) (0x10 + (x)) -#define PCMMIO_INT_PENDING_REG 0x16 -#define PCMMIO_PAGE_LOCK_REG 0x17 -#define PCMMIO_LOCK_PORT(x) ((1 << (x)) & 0x3f) -#define PCMMIO_PAGE(x) (((x) & 0x3) << 6) -#define PCMMIO_PAGE_MASK PCMUIO_PAGE(3) -#define PCMMIO_PAGE_POL 1 -#define PCMMIO_PAGE_ENAB 2 -#define PCMMIO_PAGE_INT_ID 3 -#define PCMMIO_PAGE_REG(x) (0x18 + (x)) - -static const struct comedi_lrange pcmmio_ai_ranges = { - 4, { - BIP_RANGE(5), - BIP_RANGE(10), - UNI_RANGE(5), - UNI_RANGE(10) - } -}; - -static const struct comedi_lrange pcmmio_ao_ranges = { - 6, { - UNI_RANGE(5), - UNI_RANGE(10), - BIP_RANGE(5), - BIP_RANGE(10), - BIP_RANGE(2.5), - RANGE(-2.5, 7.5) - } -}; - -struct pcmmio_private { - spinlock_t pagelock; /* protects the page registers */ - spinlock_t spinlock; /* protects the member variables */ - unsigned int enabled_mask; - unsigned int active:1; -}; - -static void pcmmio_dio_write(struct comedi_device *dev, unsigned int val, - int page, int port) -{ - struct pcmmio_private *devpriv = dev->private; - unsigned long iobase = dev->iobase; - unsigned long flags; - - spin_lock_irqsave(&devpriv->pagelock, flags); - if (page == 0) { - /* Port registers are valid for any page */ - outb(val & 0xff, iobase + PCMMIO_PORT_REG(port + 0)); - outb((val >> 8) & 0xff, iobase + PCMMIO_PORT_REG(port + 1)); - outb((val >> 16) & 0xff, iobase + PCMMIO_PORT_REG(port + 2)); - } else { - outb(PCMMIO_PAGE(page), iobase + PCMMIO_PAGE_LOCK_REG); - outb(val & 0xff, iobase + PCMMIO_PAGE_REG(0)); - outb((val >> 8) & 0xff, iobase + PCMMIO_PAGE_REG(1)); - outb((val >> 16) & 0xff, iobase + PCMMIO_PAGE_REG(2)); - } - spin_unlock_irqrestore(&devpriv->pagelock, flags); -} - -static unsigned int pcmmio_dio_read(struct comedi_device *dev, - int page, int port) -{ - struct pcmmio_private *devpriv = dev->private; - unsigned long iobase = dev->iobase; - unsigned long flags; - unsigned int val; - - spin_lock_irqsave(&devpriv->pagelock, flags); - if (page == 0) { - /* Port registers are valid for any page */ - val = inb(iobase + PCMMIO_PORT_REG(port + 0)); - val |= (inb(iobase + PCMMIO_PORT_REG(port + 1)) << 8); - val |= (inb(iobase + PCMMIO_PORT_REG(port + 2)) << 16); - } else { - outb(PCMMIO_PAGE(page), iobase + PCMMIO_PAGE_LOCK_REG); - val = inb(iobase + PCMMIO_PAGE_REG(0)); - val |= (inb(iobase + PCMMIO_PAGE_REG(1)) << 8); - val |= (inb(iobase + PCMMIO_PAGE_REG(2)) << 16); - } - spin_unlock_irqrestore(&devpriv->pagelock, flags); - - return val; -} - -/* - * Each channel can be individually programmed for input or output. - * Writing a '0' to a channel causes the corresponding output pin - * to go to a high-z state (pulled high by an external 10K resistor). - * This allows it to be used as an input. When used in the input mode, - * a read reflects the inverted state of the I/O pin, such that a - * high on the pin will read as a '0' in the register. Writing a '1' - * to a bit position causes the pin to sink current (up to 12mA), - * effectively pulling it low. - */ -static int pcmmio_dio_insn_bits(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - /* subdevice 2 uses ports 0-2, subdevice 3 uses ports 3-5 */ - int port = s->index == 2 ? 0 : 3; - unsigned int chanmask = (1 << s->n_chan) - 1; - unsigned int mask; - unsigned int val; - - mask = comedi_dio_update_state(s, data); - if (mask) { - /* - * Outputs are inverted, invert the state and - * update the channels. - * - * The s->io_bits mask makes sure the input channels - * are '0' so that the outputs pins stay in a high - * z-state. - */ - val = ~s->state & chanmask; - val &= s->io_bits; - pcmmio_dio_write(dev, val, 0, port); - } - - /* get inverted state of the channels from the port */ - val = pcmmio_dio_read(dev, 0, port); - - /* return the true state of the channels */ - data[1] = ~val & chanmask; - - return insn->n; -} - -static int pcmmio_dio_insn_config(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - /* subdevice 2 uses ports 0-2, subdevice 3 uses ports 3-5 */ - int port = s->index == 2 ? 0 : 3; - int ret; - - ret = comedi_dio_insn_config(dev, s, insn, data, 0); - if (ret) - return ret; - - if (data[0] == INSN_CONFIG_DIO_INPUT) - pcmmio_dio_write(dev, s->io_bits, 0, port); - - return insn->n; -} - -static void pcmmio_reset(struct comedi_device *dev) -{ - /* Clear all the DIO port bits */ - pcmmio_dio_write(dev, 0, 0, 0); - pcmmio_dio_write(dev, 0, 0, 3); - - /* Clear all the paged registers */ - pcmmio_dio_write(dev, 0, PCMMIO_PAGE_POL, 0); - pcmmio_dio_write(dev, 0, PCMMIO_PAGE_ENAB, 0); - pcmmio_dio_write(dev, 0, PCMMIO_PAGE_INT_ID, 0); -} - -/* devpriv->spinlock is already locked */ -static void pcmmio_stop_intr(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct pcmmio_private *devpriv = dev->private; - - devpriv->enabled_mask = 0; - devpriv->active = 0; - s->async->inttrig = NULL; - - /* disable all dio interrupts */ - pcmmio_dio_write(dev, 0, PCMMIO_PAGE_ENAB, 0); -} - -static void pcmmio_handle_dio_intr(struct comedi_device *dev, - struct comedi_subdevice *s, - unsigned int triggered) -{ - struct pcmmio_private *devpriv = dev->private; - struct comedi_cmd *cmd = &s->async->cmd; - unsigned int val = 0; - unsigned long flags; - int i; - - spin_lock_irqsave(&devpriv->spinlock, flags); - - if (!devpriv->active) - goto done; - - if (!(triggered & devpriv->enabled_mask)) - goto done; - - for (i = 0; i < cmd->chanlist_len; i++) { - unsigned int chan = CR_CHAN(cmd->chanlist[i]); - - if (triggered & (1 << chan)) - val |= (1 << i); - } - - comedi_buf_write_samples(s, &val, 1); - - if (cmd->stop_src == TRIG_COUNT && - s->async->scans_done >= cmd->stop_arg) - s->async->events |= COMEDI_CB_EOA; - -done: - spin_unlock_irqrestore(&devpriv->spinlock, flags); - - comedi_handle_events(dev, s); -} - -static irqreturn_t interrupt_pcmmio(int irq, void *d) -{ - struct comedi_device *dev = d; - struct comedi_subdevice *s = dev->read_subdev; - unsigned int triggered; - unsigned char int_pend; - - /* are there any interrupts pending */ - int_pend = inb(dev->iobase + PCMMIO_INT_PENDING_REG) & 0x07; - if (!int_pend) - return IRQ_NONE; - - /* get, and clear, the pending interrupts */ - triggered = pcmmio_dio_read(dev, PCMMIO_PAGE_INT_ID, 0); - pcmmio_dio_write(dev, 0, PCMMIO_PAGE_INT_ID, 0); - - pcmmio_handle_dio_intr(dev, s, triggered); - - return IRQ_HANDLED; -} - -/* devpriv->spinlock is already locked */ -static void pcmmio_start_intr(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct pcmmio_private *devpriv = dev->private; - struct comedi_cmd *cmd = &s->async->cmd; - unsigned int bits = 0; - unsigned int pol_bits = 0; - int i; - - devpriv->enabled_mask = 0; - devpriv->active = 1; - if (cmd->chanlist) { - for (i = 0; i < cmd->chanlist_len; i++) { - unsigned int chanspec = cmd->chanlist[i]; - unsigned int chan = CR_CHAN(chanspec); - unsigned int range = CR_RANGE(chanspec); - unsigned int aref = CR_AREF(chanspec); - - bits |= (1 << chan); - pol_bits |= (((aref || range) ? 1 : 0) << chan); - } - } - bits &= ((1 << s->n_chan) - 1); - devpriv->enabled_mask = bits; - - /* set polarity and enable interrupts */ - pcmmio_dio_write(dev, pol_bits, PCMMIO_PAGE_POL, 0); - pcmmio_dio_write(dev, bits, PCMMIO_PAGE_ENAB, 0); -} - -static int pcmmio_cancel(struct comedi_device *dev, struct comedi_subdevice *s) -{ - struct pcmmio_private *devpriv = dev->private; - unsigned long flags; - - spin_lock_irqsave(&devpriv->spinlock, flags); - if (devpriv->active) - pcmmio_stop_intr(dev, s); - spin_unlock_irqrestore(&devpriv->spinlock, flags); - - return 0; -} - -static int pcmmio_inttrig_start_intr(struct comedi_device *dev, - struct comedi_subdevice *s, - unsigned int trig_num) -{ - struct pcmmio_private *devpriv = dev->private; - struct comedi_cmd *cmd = &s->async->cmd; - unsigned long flags; - - if (trig_num != cmd->start_arg) - return -EINVAL; - - spin_lock_irqsave(&devpriv->spinlock, flags); - s->async->inttrig = NULL; - if (devpriv->active) - pcmmio_start_intr(dev, s); - spin_unlock_irqrestore(&devpriv->spinlock, flags); - - return 1; -} - -/* - * 'do_cmd' function for an 'INTERRUPT' subdevice. - */ -static int pcmmio_cmd(struct comedi_device *dev, struct comedi_subdevice *s) -{ - struct pcmmio_private *devpriv = dev->private; - struct comedi_cmd *cmd = &s->async->cmd; - unsigned long flags; - - spin_lock_irqsave(&devpriv->spinlock, flags); - devpriv->active = 1; - - /* Set up start of acquisition. */ - if (cmd->start_src == TRIG_INT) - s->async->inttrig = pcmmio_inttrig_start_intr; - else /* TRIG_NOW */ - pcmmio_start_intr(dev, s); - - spin_unlock_irqrestore(&devpriv->spinlock, flags); - - return 0; -} - -static int pcmmio_cmdtest(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_cmd *cmd) -{ - int err = 0; - - /* Step 1 : check if triggers are trivially valid */ - - err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT); - err |= comedi_check_trigger_src(&cmd->scan_begin_src, 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_COUNT | 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->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_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_NONE */ - err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); - - if (err) - return 3; - - /* step 4: fix up any arguments */ - - /* if (err) return 4; */ - - return 0; -} - -static int pcmmio_ai_eoc(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned long context) -{ - unsigned char status; - - status = inb(dev->iobase + PCMMIO_AI_STATUS_REG); - if (status & PCMMIO_AI_STATUS_DATA_READY) - return 0; - return -EBUSY; -} - -static int pcmmio_ai_insn_read(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - unsigned long iobase = dev->iobase; - unsigned int chan = CR_CHAN(insn->chanspec); - unsigned int range = CR_RANGE(insn->chanspec); - unsigned int aref = CR_AREF(insn->chanspec); - unsigned char cmd = 0; - unsigned int val; - int ret; - int i; - - /* - * The PCM-MIO uses two Linear Tech LTC1859CG 8-channel A/D converters. - * The devices use a full duplex serial interface which transmits and - * receives data simultaneously. An 8-bit command is shifted into the - * ADC interface to configure it for the next conversion. At the same - * time, the data from the previous conversion is shifted out of the - * device. Consequently, the conversion result is delayed by one - * conversion from the command word. - * - * Setup the cmd for the conversions then do a dummy conversion to - * flush the junk data. Then do each conversion requested by the - * comedi_insn. Note that the last conversion will leave junk data - * in ADC which will get flushed on the next comedi_insn. - */ - - if (chan > 7) { - chan -= 8; - iobase += PCMMIO_AI_2ND_ADC_OFFSET; - } - - if (aref == AREF_GROUND) - cmd |= PCMMIO_AI_CMD_SE; - if (chan % 2) - cmd |= PCMMIO_AI_CMD_ODD_CHAN; - cmd |= PCMMIO_AI_CMD_CHAN_SEL(chan / 2); - cmd |= PCMMIO_AI_CMD_RANGE(range); - - outb(cmd, iobase + PCMMIO_AI_CMD_REG); - - ret = comedi_timeout(dev, s, insn, pcmmio_ai_eoc, 0); - if (ret) - return ret; - - val = inb(iobase + PCMMIO_AI_LSB_REG); - val |= inb(iobase + PCMMIO_AI_MSB_REG) << 8; - - for (i = 0; i < insn->n; i++) { - outb(cmd, iobase + PCMMIO_AI_CMD_REG); - - ret = comedi_timeout(dev, s, insn, pcmmio_ai_eoc, 0); - if (ret) - return ret; - - val = inb(iobase + PCMMIO_AI_LSB_REG); - val |= inb(iobase + PCMMIO_AI_MSB_REG) << 8; - - /* bipolar data is two's complement */ - if (comedi_range_is_bipolar(s, range)) - val = comedi_offset_munge(s, val); - - data[i] = val; - } - - return insn->n; -} - -static int pcmmio_ao_eoc(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned long context) -{ - unsigned char status; - - status = inb(dev->iobase + PCMMIO_AO_STATUS_REG); - if (status & PCMMIO_AO_STATUS_DATA_READY) - return 0; - return -EBUSY; -} - -static int pcmmio_ao_insn_write(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - unsigned long iobase = dev->iobase; - unsigned int chan = CR_CHAN(insn->chanspec); - unsigned int range = CR_RANGE(insn->chanspec); - unsigned char cmd = 0; - int ret; - int i; - - /* - * The PCM-MIO has two Linear Tech LTC2704 DAC devices. Each device - * is a 4-channel converter with software-selectable output range. - */ - - if (chan > 3) { - cmd |= PCMMIO_AO_CMD_CHAN_SEL(chan - 4); - iobase += PCMMIO_AO_2ND_DAC_OFFSET; - } else { - cmd |= PCMMIO_AO_CMD_CHAN_SEL(chan); - } - - /* set the range for the channel */ - outb(PCMMIO_AO_LSB_SPAN(range), iobase + PCMMIO_AO_LSB_REG); - outb(0, iobase + PCMMIO_AO_MSB_REG); - outb(cmd | PCMMIO_AO_CMD_WR_SPAN_UPDATE, iobase + PCMMIO_AO_CMD_REG); - - ret = comedi_timeout(dev, s, insn, pcmmio_ao_eoc, 0); - if (ret) - return ret; - - for (i = 0; i < insn->n; i++) { - unsigned int val = data[i]; - - /* write the data to the channel */ - outb(val & 0xff, iobase + PCMMIO_AO_LSB_REG); - outb((val >> 8) & 0xff, iobase + PCMMIO_AO_MSB_REG); - outb(cmd | PCMMIO_AO_CMD_WR_CODE_UPDATE, - iobase + PCMMIO_AO_CMD_REG); - - ret = comedi_timeout(dev, s, insn, pcmmio_ao_eoc, 0); - if (ret) - return ret; - - s->readback[chan] = val; - } - - return insn->n; -} - -static int pcmmio_attach(struct comedi_device *dev, struct comedi_devconfig *it) -{ - struct pcmmio_private *devpriv; - struct comedi_subdevice *s; - int ret; - - ret = comedi_request_region(dev, it->options[0], 32); - if (ret) - return ret; - - devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); - if (!devpriv) - return -ENOMEM; - - spin_lock_init(&devpriv->pagelock); - spin_lock_init(&devpriv->spinlock); - - pcmmio_reset(dev); - - if (it->options[1]) { - ret = request_irq(it->options[1], interrupt_pcmmio, 0, - dev->board_name, dev); - if (ret == 0) { - dev->irq = it->options[1]; - - /* configure the interrupt routing on the board */ - outb(PCMMIO_AI_RES_ENA_DIO_RES_ACCESS, - dev->iobase + PCMMIO_AI_RES_ENA_REG); - outb(PCMMIO_RESOURCE_IRQ(dev->irq), - dev->iobase + PCMMIO_RESOURCE_REG); - } - } - - ret = comedi_alloc_subdevices(dev, 4); - if (ret) - return ret; - - /* Analog Input subdevice */ - s = &dev->subdevices[0]; - s->type = COMEDI_SUBD_AI; - s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF; - s->n_chan = 16; - s->maxdata = 0xffff; - s->range_table = &pcmmio_ai_ranges; - s->insn_read = pcmmio_ai_insn_read; - - /* initialize the resource enable register by clearing it */ - outb(PCMMIO_AI_RES_ENA_CMD_REG_ACCESS, - dev->iobase + PCMMIO_AI_RES_ENA_REG); - outb(PCMMIO_AI_RES_ENA_CMD_REG_ACCESS, - dev->iobase + PCMMIO_AI_RES_ENA_REG + PCMMIO_AI_2ND_ADC_OFFSET); - - /* Analog Output subdevice */ - s = &dev->subdevices[1]; - s->type = COMEDI_SUBD_AO; - s->subdev_flags = SDF_READABLE; - s->n_chan = 8; - s->maxdata = 0xffff; - s->range_table = &pcmmio_ao_ranges; - s->insn_write = pcmmio_ao_insn_write; - - ret = comedi_alloc_subdev_readback(s); - if (ret) - return ret; - - /* initialize the resource enable register by clearing it */ - outb(0, dev->iobase + PCMMIO_AO_RESOURCE_ENA_REG); - outb(0, dev->iobase + PCMMIO_AO_2ND_DAC_OFFSET + - PCMMIO_AO_RESOURCE_ENA_REG); - - /* Digital I/O subdevice with interrupt support */ - s = &dev->subdevices[2]; - s->type = COMEDI_SUBD_DIO; - s->subdev_flags = SDF_READABLE | SDF_WRITABLE; - s->n_chan = 24; - s->maxdata = 1; - s->len_chanlist = 1; - s->range_table = &range_digital; - s->insn_bits = pcmmio_dio_insn_bits; - s->insn_config = pcmmio_dio_insn_config; - if (dev->irq) { - dev->read_subdev = s; - s->subdev_flags |= SDF_CMD_READ | SDF_LSAMPL | SDF_PACKED; - s->len_chanlist = s->n_chan; - s->cancel = pcmmio_cancel; - s->do_cmd = pcmmio_cmd; - s->do_cmdtest = pcmmio_cmdtest; - } - - /* Digital I/O subdevice */ - s = &dev->subdevices[3]; - s->type = COMEDI_SUBD_DIO; - s->subdev_flags = SDF_READABLE | SDF_WRITABLE; - s->n_chan = 24; - s->maxdata = 1; - s->range_table = &range_digital; - s->insn_bits = pcmmio_dio_insn_bits; - s->insn_config = pcmmio_dio_insn_config; - - return 0; -} - -static struct comedi_driver pcmmio_driver = { - .driver_name = "pcmmio", - .module = THIS_MODULE, - .attach = pcmmio_attach, - .detach = comedi_legacy_detach, -}; -module_comedi_driver(pcmmio_driver); - -MODULE_AUTHOR("Comedi https://www.comedi.org"); -MODULE_DESCRIPTION("Comedi driver for Winsystems PCM-MIO PC/104 board"); -MODULE_LICENSE("GPL"); |