1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * addi_apci_2032.c 4 * Copyright (C) 2004,2005 ADDI-DATA GmbH for the source code of this module. 5 * Project manager: Eric Stolz 6 * 7 * ADDI-DATA GmbH 8 * Dieselstrasse 3 9 * D-77833 Ottersweier 10 * Tel: +19(0)7223/9493-0 11 * Fax: +49(0)7223/9493-92 12 * http://www.addi-data.com 13 * info@addi-data.com 14 */ 15 16#include <linux/module.h> 17#include <linux/interrupt.h> 18#include <linux/slab.h> 19#include <linux/comedi/comedi_pci.h> 20 21#include "addi_watchdog.h" 22 23/* 24 * PCI bar 1 I/O Register map 25 */ 26#define APCI2032_DO_REG 0x00 27#define APCI2032_INT_CTRL_REG 0x04 28#define APCI2032_INT_CTRL_VCC_ENA BIT(0) 29#define APCI2032_INT_CTRL_CC_ENA BIT(1) 30#define APCI2032_INT_STATUS_REG 0x08 31#define APCI2032_INT_STATUS_VCC BIT(0) 32#define APCI2032_INT_STATUS_CC BIT(1) 33#define APCI2032_STATUS_REG 0x0c 34#define APCI2032_STATUS_IRQ BIT(0) 35#define APCI2032_WDOG_REG 0x10 36 37struct apci2032_int_private { 38 spinlock_t spinlock; /* protects the following members */ 39 bool active; /* an async command is running */ 40 unsigned char enabled_isns; /* mask of enabled interrupt channels */ 41}; 42 43static int apci2032_do_insn_bits(struct comedi_device *dev, 44 struct comedi_subdevice *s, 45 struct comedi_insn *insn, 46 unsigned int *data) 47{ 48 s->state = inl(dev->iobase + APCI2032_DO_REG); 49 50 if (comedi_dio_update_state(s, data)) 51 outl(s->state, dev->iobase + APCI2032_DO_REG); 52 53 data[1] = s->state; 54 55 return insn->n; 56} 57 58static int apci2032_int_insn_bits(struct comedi_device *dev, 59 struct comedi_subdevice *s, 60 struct comedi_insn *insn, 61 unsigned int *data) 62{ 63 data[1] = inl(dev->iobase + APCI2032_INT_STATUS_REG) & 3; 64 return insn->n; 65} 66 67static void apci2032_int_stop(struct comedi_device *dev, 68 struct comedi_subdevice *s) 69{ 70 struct apci2032_int_private *subpriv = s->private; 71 72 subpriv->active = false; 73 subpriv->enabled_isns = 0; 74 outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG); 75} 76 77static int apci2032_int_cmdtest(struct comedi_device *dev, 78 struct comedi_subdevice *s, 79 struct comedi_cmd *cmd) 80{ 81 int err = 0; 82 83 /* Step 1 : check if triggers are trivially valid */ 84 85 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW); 86 err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT); 87 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW); 88 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT); 89 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE); 90 91 if (err) 92 return 1; 93 94 /* Step 2a : make sure trigger sources are unique */ 95 err |= comedi_check_trigger_is_unique(cmd->stop_src); 96 97 /* Step 2b : and mutually compatible */ 98 99 if (err) 100 return 2; 101 102 /* Step 3: check if arguments are trivially valid */ 103 104 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0); 105 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0); 106 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0); 107 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, 108 cmd->chanlist_len); 109 if (cmd->stop_src == TRIG_COUNT) 110 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1); 111 else /* TRIG_NONE */ 112 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); 113 114 if (err) 115 return 3; 116 117 /* Step 4: fix up any arguments */ 118 119 /* Step 5: check channel list if it exists */ 120 121 return 0; 122} 123 124static int apci2032_int_cmd(struct comedi_device *dev, 125 struct comedi_subdevice *s) 126{ 127 struct comedi_cmd *cmd = &s->async->cmd; 128 struct apci2032_int_private *subpriv = s->private; 129 unsigned char enabled_isns; 130 unsigned int n; 131 unsigned long flags; 132 133 enabled_isns = 0; 134 for (n = 0; n < cmd->chanlist_len; n++) 135 enabled_isns |= 1 << CR_CHAN(cmd->chanlist[n]); 136 137 spin_lock_irqsave(&subpriv->spinlock, flags); 138 139 subpriv->enabled_isns = enabled_isns; 140 subpriv->active = true; 141 outl(enabled_isns, dev->iobase + APCI2032_INT_CTRL_REG); 142 143 spin_unlock_irqrestore(&subpriv->spinlock, flags); 144 145 return 0; 146} 147 148static int apci2032_int_cancel(struct comedi_device *dev, 149 struct comedi_subdevice *s) 150{ 151 struct apci2032_int_private *subpriv = s->private; 152 unsigned long flags; 153 154 spin_lock_irqsave(&subpriv->spinlock, flags); 155 if (subpriv->active) 156 apci2032_int_stop(dev, s); 157 spin_unlock_irqrestore(&subpriv->spinlock, flags); 158 159 return 0; 160} 161 162static irqreturn_t apci2032_interrupt(int irq, void *d) 163{ 164 struct comedi_device *dev = d; 165 struct comedi_subdevice *s = dev->read_subdev; 166 struct comedi_cmd *cmd = &s->async->cmd; 167 struct apci2032_int_private *subpriv; 168 unsigned int val; 169 170 if (!dev->attached) 171 return IRQ_NONE; 172 173 /* Check if VCC OR CC interrupt has occurred */ 174 val = inl(dev->iobase + APCI2032_STATUS_REG) & APCI2032_STATUS_IRQ; 175 if (!val) 176 return IRQ_NONE; 177 178 subpriv = s->private; 179 spin_lock(&subpriv->spinlock); 180 181 val = inl(dev->iobase + APCI2032_INT_STATUS_REG) & 3; 182 /* Disable triggered interrupt sources. */ 183 outl(~val & 3, dev->iobase + APCI2032_INT_CTRL_REG); 184 /* 185 * Note: We don't reenable the triggered interrupt sources because they 186 * are level-sensitive, hardware error status interrupt sources and 187 * they'd keep triggering interrupts repeatedly. 188 */ 189 190 if (subpriv->active && (val & subpriv->enabled_isns) != 0) { 191 unsigned short bits = 0; 192 int i; 193 194 /* Bits in scan data correspond to indices in channel list. */ 195 for (i = 0; i < cmd->chanlist_len; i++) { 196 unsigned int chan = CR_CHAN(cmd->chanlist[i]); 197 198 if (val & (1 << chan)) 199 bits |= (1 << i); 200 } 201 202 comedi_buf_write_samples(s, &bits, 1); 203 204 if (cmd->stop_src == TRIG_COUNT && 205 s->async->scans_done >= cmd->stop_arg) 206 s->async->events |= COMEDI_CB_EOA; 207 } 208 209 spin_unlock(&subpriv->spinlock); 210 211 comedi_handle_events(dev, s); 212 213 return IRQ_HANDLED; 214} 215 216static int apci2032_reset(struct comedi_device *dev) 217{ 218 outl(0x0, dev->iobase + APCI2032_DO_REG); 219 outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG); 220 221 addi_watchdog_reset(dev->iobase + APCI2032_WDOG_REG); 222 223 return 0; 224} 225 226static int apci2032_auto_attach(struct comedi_device *dev, 227 unsigned long context_unused) 228{ 229 struct pci_dev *pcidev = comedi_to_pci_dev(dev); 230 struct comedi_subdevice *s; 231 int ret; 232 233 ret = comedi_pci_enable(dev); 234 if (ret) 235 return ret; 236 dev->iobase = pci_resource_start(pcidev, 1); 237 apci2032_reset(dev); 238 239 if (pcidev->irq > 0) { 240 ret = request_irq(pcidev->irq, apci2032_interrupt, 241 IRQF_SHARED, dev->board_name, dev); 242 if (ret == 0) 243 dev->irq = pcidev->irq; 244 } 245 246 ret = comedi_alloc_subdevices(dev, 3); 247 if (ret) 248 return ret; 249 250 /* Initialize the digital output subdevice */ 251 s = &dev->subdevices[0]; 252 s->type = COMEDI_SUBD_DO; 253 s->subdev_flags = SDF_WRITABLE; 254 s->n_chan = 32; 255 s->maxdata = 1; 256 s->range_table = &range_digital; 257 s->insn_bits = apci2032_do_insn_bits; 258 259 /* Initialize the watchdog subdevice */ 260 s = &dev->subdevices[1]; 261 ret = addi_watchdog_init(s, dev->iobase + APCI2032_WDOG_REG); 262 if (ret) 263 return ret; 264 265 /* Initialize the interrupt subdevice */ 266 s = &dev->subdevices[2]; 267 s->type = COMEDI_SUBD_DI; 268 s->subdev_flags = SDF_READABLE; 269 s->n_chan = 2; 270 s->maxdata = 1; 271 s->range_table = &range_digital; 272 s->insn_bits = apci2032_int_insn_bits; 273 if (dev->irq) { 274 struct apci2032_int_private *subpriv; 275 276 dev->read_subdev = s; 277 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL); 278 if (!subpriv) 279 return -ENOMEM; 280 spin_lock_init(&subpriv->spinlock); 281 s->private = subpriv; 282 s->subdev_flags = SDF_READABLE | SDF_CMD_READ | SDF_PACKED; 283 s->len_chanlist = 2; 284 s->do_cmdtest = apci2032_int_cmdtest; 285 s->do_cmd = apci2032_int_cmd; 286 s->cancel = apci2032_int_cancel; 287 } 288 289 return 0; 290} 291 292static void apci2032_detach(struct comedi_device *dev) 293{ 294 if (dev->iobase) 295 apci2032_reset(dev); 296 comedi_pci_detach(dev); 297 if (dev->read_subdev) 298 kfree(dev->read_subdev->private); 299} 300 301static struct comedi_driver apci2032_driver = { 302 .driver_name = "addi_apci_2032", 303 .module = THIS_MODULE, 304 .auto_attach = apci2032_auto_attach, 305 .detach = apci2032_detach, 306}; 307 308static int apci2032_pci_probe(struct pci_dev *dev, 309 const struct pci_device_id *id) 310{ 311 return comedi_pci_auto_config(dev, &apci2032_driver, id->driver_data); 312} 313 314static const struct pci_device_id apci2032_pci_table[] = { 315 { PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, 0x1004) }, 316 { 0 } 317}; 318MODULE_DEVICE_TABLE(pci, apci2032_pci_table); 319 320static struct pci_driver apci2032_pci_driver = { 321 .name = "addi_apci_2032", 322 .id_table = apci2032_pci_table, 323 .probe = apci2032_pci_probe, 324 .remove = comedi_pci_auto_unconfig, 325}; 326module_comedi_pci_driver(apci2032_driver, apci2032_pci_driver); 327 328MODULE_AUTHOR("Comedi https://www.comedi.org"); 329MODULE_DESCRIPTION("ADDI-DATA APCI-2032, 32 channel DO boards"); 330MODULE_LICENSE("GPL"); 331