diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/adl_pci7x3x.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/adl_pci7x3x.c | 284 |
1 files changed, 274 insertions, 10 deletions
diff --git a/drivers/staging/comedi/drivers/adl_pci7x3x.c b/drivers/staging/comedi/drivers/adl_pci7x3x.c index d0081897fe47..8fc45638ff59 100644 --- a/drivers/staging/comedi/drivers/adl_pci7x3x.c +++ b/drivers/staging/comedi/drivers/adl_pci7x3x.c @@ -19,14 +19,15 @@ * PCI-7234 (adl_pci7234), PCI-7432 (adl_pci7432), PCI-7433 (adl_pci7433), * PCI-7434 (adl_pci7434) * Author: H Hartley Sweeten <hsweeten@visionengravers.com> - * Updated: Thu, 02 Aug 2012 14:27:46 -0700 - * Status: untested + * Updated: Fri, 20 Nov 2020 14:49:36 +0000 + * Status: works (tested on PCI-7230) * * One or two subdevices are setup by this driver depending on * the number of digital inputs and/or outputs provided by the * board. Each subdevice has a maximum of 32 channels. * - * PCI-7230 - 2 subdevices: 0 - 16 input, 1 - 16 output + * PCI-7230 - 4 subdevices: 0 - 16 input, 1 - 16 output, + * 2 - IRQ_IDI0, 3 - IRQ_IDI1 * PCI-7233 - 1 subdevice: 0 - 32 input * PCI-7234 - 1 subdevice: 0 - 32 output * PCI-7432 - 2 subdevices: 0 - 32 input, 1 - 32 output @@ -37,8 +38,9 @@ * interrupt signals on digital input channels 0 and 1. The PCI-7233 * has dual-interrupt sources for change-of-state (COS) on any 16 * digital input channels of LSB and for COS on any 16 digital input - * lines of MSB. Interrupts are not currently supported by this - * driver. + * lines of MSB. + * + * Currently, this driver only supports interrupts for PCI-7230. * * Configuration Options: not applicable, uses comedi PCI auto config */ @@ -47,13 +49,22 @@ #include "../comedi_pci.h" +#include "plx9052.h" + /* * Register I/O map (32-bit access only) */ -#define PCI7X3X_DIO_REG 0x00 -#define PCI743X_DIO_REG 0x04 +#define PCI7X3X_DIO_REG 0x0000 /* in the DigIO Port area */ +#define PCI743X_DIO_REG 0x0004 + +#define ADL_PT_CLRIRQ 0x0040 /* in the DigIO Port area */ -enum apci1516_boardid { +#define LINTI1_EN_ACT_IDI0 (PLX9052_INTCSR_LI1ENAB | PLX9052_INTCSR_LI1STAT) +#define LINTI2_EN_ACT_IDI1 (PLX9052_INTCSR_LI2ENAB | PLX9052_INTCSR_LI2STAT) +#define EN_PCI_LINT2H_LINT1H \ + (PLX9052_INTCSR_PCIENAB | PLX9052_INTCSR_LI2POL | PLX9052_INTCSR_LI1POL) + +enum adl_pci7x3x_boardid { BOARD_PCI7230, BOARD_PCI7233, BOARD_PCI7234, @@ -67,14 +78,16 @@ struct adl_pci7x3x_boardinfo { int nsubdevs; int di_nchan; int do_nchan; + int irq_nchan; }; static const struct adl_pci7x3x_boardinfo adl_pci7x3x_boards[] = { [BOARD_PCI7230] = { .name = "adl_pci7230", - .nsubdevs = 2, + .nsubdevs = 4, /* IDI, IDO, IRQ_IDI0, IRQ_IDI1 */ .di_nchan = 16, .do_nchan = 16, + .irq_nchan = 2, }, [BOARD_PCI7233] = { .name = "adl_pci7233", @@ -104,6 +117,178 @@ static const struct adl_pci7x3x_boardinfo adl_pci7x3x_boards[] = { } }; +struct adl_pci7x3x_dev_private_data { + unsigned long lcr_io_base; + unsigned int int_ctrl; +}; + +struct adl_pci7x3x_sd_private_data { + spinlock_t subd_slock; /* spin-lock for cmd_running */ + unsigned long port_offset; + short int cmd_running; +}; + +static void process_irq(struct comedi_device *dev, unsigned int subdev, + unsigned short intcsr) +{ + struct comedi_subdevice *s = &dev->subdevices[subdev]; + struct adl_pci7x3x_sd_private_data *sd_priv = s->private; + unsigned long reg = sd_priv->port_offset; + struct comedi_async *async_p = s->async; + + if (async_p) { + unsigned short val = inw(dev->iobase + reg); + + spin_lock(&sd_priv->subd_slock); + if (sd_priv->cmd_running) + comedi_buf_write_samples(s, &val, 1); + spin_unlock(&sd_priv->subd_slock); + comedi_handle_events(dev, s); + } +} + +static irqreturn_t adl_pci7x3x_interrupt(int irq, void *p_device) +{ + struct comedi_device *dev = p_device; + struct adl_pci7x3x_dev_private_data *dev_private = dev->private; + unsigned long cpu_flags; + unsigned int intcsr; + bool li1stat, li2stat; + + if (!dev->attached) { + /* Ignore interrupt before device fully attached. */ + /* Might not even have allocated subdevices yet! */ + return IRQ_NONE; + } + + /* Check if we are source of interrupt */ + spin_lock_irqsave(&dev->spinlock, cpu_flags); + intcsr = inl(dev_private->lcr_io_base + PLX9052_INTCSR); + li1stat = (intcsr & LINTI1_EN_ACT_IDI0) == LINTI1_EN_ACT_IDI0; + li2stat = (intcsr & LINTI2_EN_ACT_IDI1) == LINTI2_EN_ACT_IDI1; + if (li1stat || li2stat) { + /* clear all current interrupt flags */ + /* Fixme: Reset all 2 Int Flags */ + outb(0x00, dev->iobase + ADL_PT_CLRIRQ); + } + spin_unlock_irqrestore(&dev->spinlock, cpu_flags); + + /* SubDev 2, 3 = Isolated DigIn , on "SCSI2" jack!*/ + + if (li1stat) /* 0x0005 LINTi1 is Enabled && IDI0 is 1 */ + process_irq(dev, 2, intcsr); + + if (li2stat) /* 0x0028 LINTi2 is Enabled && IDI1 is 1 */ + process_irq(dev, 3, intcsr); + + return IRQ_RETVAL(li1stat || li2stat); +} + +static int adl_pci7x3x_asy_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); + err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT); + err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW); + 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 */ + /* Step 2b : and mutually compatible */ + + /* 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); + err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); + + if (err) + return 3; + + /* Step 4: fix up any arguments */ + + /* Step 5: check channel list if it exists */ + + return 0; +} + +static int adl_pci7x3x_asy_cmd(struct comedi_device *dev, + struct comedi_subdevice *s) +{ + struct adl_pci7x3x_dev_private_data *dev_private = dev->private; + struct adl_pci7x3x_sd_private_data *sd_priv = s->private; + unsigned long cpu_flags; + unsigned int int_enab; + + if (s->index == 2) { + /* enable LINTi1 == IDI sdi[0] Ch 0 IRQ ActHigh */ + int_enab = PLX9052_INTCSR_LI1ENAB; + } else { + /* enable LINTi2 == IDI sdi[0] Ch 1 IRQ ActHigh */ + int_enab = PLX9052_INTCSR_LI2ENAB; + } + + spin_lock_irqsave(&dev->spinlock, cpu_flags); + dev_private->int_ctrl |= int_enab; + outl(dev_private->int_ctrl, dev_private->lcr_io_base + PLX9052_INTCSR); + spin_unlock_irqrestore(&dev->spinlock, cpu_flags); + + spin_lock_irqsave(&sd_priv->subd_slock, cpu_flags); + sd_priv->cmd_running = 1; + spin_unlock_irqrestore(&sd_priv->subd_slock, cpu_flags); + + return 0; +} + +static int adl_pci7x3x_asy_cancel(struct comedi_device *dev, + struct comedi_subdevice *s) +{ + struct adl_pci7x3x_dev_private_data *dev_private = dev->private; + struct adl_pci7x3x_sd_private_data *sd_priv = s->private; + unsigned long cpu_flags; + unsigned int int_enab; + + spin_lock_irqsave(&sd_priv->subd_slock, cpu_flags); + sd_priv->cmd_running = 0; + spin_unlock_irqrestore(&sd_priv->subd_slock, cpu_flags); + /* disable Interrupts */ + if (s->index == 2) + int_enab = PLX9052_INTCSR_LI1ENAB; + else + int_enab = PLX9052_INTCSR_LI2ENAB; + spin_lock_irqsave(&dev->spinlock, cpu_flags); + dev_private->int_ctrl &= ~int_enab; + outl(dev_private->int_ctrl, dev_private->lcr_io_base + PLX9052_INTCSR); + spin_unlock_irqrestore(&dev->spinlock, cpu_flags); + + return 0; +} + +/* same as _di_insn_bits because the IRQ-pins are the DI-ports */ +static int adl_pci7x3x_dirq_insn_bits(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + struct adl_pci7x3x_sd_private_data *sd_priv = s->private; + unsigned long reg = (unsigned long)sd_priv->port_offset; + + data[1] = inl(dev->iobase + reg); + + return insn->n; +} + static int adl_pci7x3x_do_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, @@ -143,15 +328,28 @@ static int adl_pci7x3x_di_insn_bits(struct comedi_device *dev, return insn->n; } +static int adl_pci7x3x_reset(struct comedi_device *dev) +{ + struct adl_pci7x3x_dev_private_data *dev_private = dev->private; + + /* disable Interrupts */ + dev_private->int_ctrl = 0x00; /* Disable PCI + LINTi2 + LINTi1 */ + outl(dev_private->int_ctrl, dev_private->lcr_io_base + PLX9052_INTCSR); + + return 0; +} + static int adl_pci7x3x_auto_attach(struct comedi_device *dev, unsigned long context) { struct pci_dev *pcidev = comedi_to_pci_dev(dev); const struct adl_pci7x3x_boardinfo *board = NULL; struct comedi_subdevice *s; + struct adl_pci7x3x_dev_private_data *dev_private; int subdev; int nchan; int ret; + int ic; if (context < ARRAY_SIZE(adl_pci7x3x_boards)) board = &adl_pci7x3x_boards[context]; @@ -160,10 +358,34 @@ static int adl_pci7x3x_auto_attach(struct comedi_device *dev, dev->board_ptr = board; dev->board_name = board->name; + dev_private = comedi_alloc_devpriv(dev, sizeof(*dev_private)); + if (!dev_private) + return -ENOMEM; + ret = comedi_pci_enable(dev); if (ret) return ret; dev->iobase = pci_resource_start(pcidev, 2); + dev_private->lcr_io_base = pci_resource_start(pcidev, 1); + + adl_pci7x3x_reset(dev); + + if (board->irq_nchan) { + /* discard all evtl. old IRQs */ + outb(0x00, dev->iobase + ADL_PT_CLRIRQ); + + if (pcidev->irq) { + ret = request_irq(pcidev->irq, adl_pci7x3x_interrupt, + IRQF_SHARED, dev->board_name, dev); + if (ret == 0) { + dev->irq = pcidev->irq; + /* 0x52 PCI + IDI Ch 1 Ch 0 IRQ Off ActHigh */ + dev_private->int_ctrl = EN_PCI_LINT2H_LINT1H; + outl(dev_private->int_ctrl, + dev_private->lcr_io_base + PLX9052_INTCSR); + } + } + } ret = comedi_alloc_subdevices(dev, board->nsubdevs); if (ret) @@ -237,14 +459,56 @@ static int adl_pci7x3x_auto_attach(struct comedi_device *dev, } } + for (ic = 0; ic < board->irq_nchan; ++ic) { + struct adl_pci7x3x_sd_private_data *sd_priv; + + nchan = 1; + + s = &dev->subdevices[subdev]; + /* Isolated digital inputs 0 or 1 */ + s->type = COMEDI_SUBD_DI; + s->subdev_flags = SDF_READABLE; + s->n_chan = nchan; + s->maxdata = 1; + s->insn_bits = adl_pci7x3x_dirq_insn_bits; + s->range_table = &range_digital; + + sd_priv = comedi_alloc_spriv(s, sizeof(*sd_priv)); + if (!sd_priv) + return -ENOMEM; + + spin_lock_init(&sd_priv->subd_slock); + sd_priv->port_offset = PCI7X3X_DIO_REG; + sd_priv->cmd_running = 0; + + if (dev->irq) { + dev->read_subdev = s; + s->type = COMEDI_SUBD_DI; + s->subdev_flags = SDF_READABLE | SDF_CMD_READ; + s->len_chanlist = 1; + s->do_cmdtest = adl_pci7x3x_asy_cmdtest; + s->do_cmd = adl_pci7x3x_asy_cmd; + s->cancel = adl_pci7x3x_asy_cancel; + } + + subdev++; + } + return 0; } +static void adl_pci7x3x_detach(struct comedi_device *dev) +{ + if (dev->iobase) + adl_pci7x3x_reset(dev); + comedi_pci_detach(dev); +} + static struct comedi_driver adl_pci7x3x_driver = { .driver_name = "adl_pci7x3x", .module = THIS_MODULE, .auto_attach = adl_pci7x3x_auto_attach, - .detach = comedi_pci_detach, + .detach = adl_pci7x3x_detach, }; static int adl_pci7x3x_pci_probe(struct pci_dev *dev, |