1 /* comedi/drivers/amplc_dio200_pci.c
3 Driver for Amplicon PCI215, PCI272, PCIe215, PCIe236, PCIe296.
5 Copyright (C) 2005-2013 MEV Ltd. <http://www.mev.co.uk/>
7 COMEDI - Linux Control and Measurement Device Interface
8 Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org>
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
21 * Driver: amplc_dio200_pci
22 * Description: Amplicon 200 Series PCI Digital I/O
23 * Author: Ian Abbott <abbotti@mev.co.uk>
24 * Devices: [Amplicon] PCI215 (amplc_dio200_pci), PCIe215, PCIe236,
26 * Updated: Mon, 18 Mar 2013 15:03:50 +0000
29 * Configuration options:
32 * Manual configuration of PCI(e) cards is not supported; they are configured
37 * PCI215 PCIe215 PCIe236
38 * ------------- ------------- -------------
41 * 1 PPI-Y UNUSED UNUSED
42 * 2 CTR-Z1 PPI-Y UNUSED
43 * 3 CTR-Z2 UNUSED UNUSED
44 * 4 INTERRUPT CTR-Z1 CTR-Z1
47 * 7 INTERRUPT INTERRUPT
51 * ------------- -------------
62 * Each PPI is a 8255 chip providing 24 DIO channels. The DIO channels
63 * are configurable as inputs or outputs in four groups:
65 * Port A - channels 0 to 7
66 * Port B - channels 8 to 15
67 * Port CL - channels 16 to 19
68 * Port CH - channels 20 to 23
70 * Only mode 0 of the 8255 chips is supported.
72 * Each CTR is a 8254 chip providing 3 16-bit counter channels. Each
73 * channel is configured individually with INSN_CONFIG instructions. The
74 * specific type of configuration instruction is specified in data[0].
75 * Some configuration instructions expect an additional parameter in
76 * data[1]; others return a value in data[1]. The following configuration
77 * instructions are supported:
79 * INSN_CONFIG_SET_COUNTER_MODE. Sets the counter channel's mode and
80 * BCD/binary setting specified in data[1].
82 * INSN_CONFIG_8254_READ_STATUS. Reads the status register value for the
83 * counter channel into data[1].
85 * INSN_CONFIG_SET_CLOCK_SRC. Sets the counter channel's clock source as
86 * specified in data[1] (this is a hardware-specific value). Not
87 * supported on PC214E. For the other boards, valid clock sources are
90 * 0. CLK n, the counter channel's dedicated CLK input from the SK1
91 * connector. (N.B. for other values, the counter channel's CLKn
92 * pin on the SK1 connector is an output!)
93 * 1. Internal 10 MHz clock.
94 * 2. Internal 1 MHz clock.
95 * 3. Internal 100 kHz clock.
96 * 4. Internal 10 kHz clock.
97 * 5. Internal 1 kHz clock.
98 * 6. OUT n-1, the output of counter channel n-1 (see note 1 below).
99 * 7. Ext Clock, the counter chip's dedicated Ext Clock input from
100 * the SK1 connector. This pin is shared by all three counter
101 * channels on the chip.
103 * For the PCIe boards, clock sources in the range 0 to 31 are allowed
104 * and the following additional clock sources are defined:
106 * 8. HIGH logic level.
107 * 9. LOW logic level.
108 * 10. "Pattern present" signal.
109 * 11. Internal 20 MHz clock.
111 * INSN_CONFIG_GET_CLOCK_SRC. Returns the counter channel's current
112 * clock source in data[1]. For internal clock sources, data[2] is set
113 * to the period in ns.
115 * INSN_CONFIG_SET_GATE_SRC. Sets the counter channel's gate source as
116 * specified in data[2] (this is a hardware-specific value). Not
117 * supported on PC214E. For the other boards, valid gate sources are 0
120 * 0. VCC (internal +5V d.c.), i.e. gate permanently enabled.
121 * 1. GND (internal 0V d.c.), i.e. gate permanently disabled.
122 * 2. GAT n, the counter channel's dedicated GAT input from the SK1
123 * connector. (N.B. for other values, the counter channel's GATn
124 * pin on the SK1 connector is an output!)
125 * 3. /OUT n-2, the inverted output of counter channel n-2 (see note
132 * For the PCIe boards, gate sources in the range 0 to 31 are allowed;
133 * the following additional clock sources and clock sources 6 and 7 are
136 * 6. /GAT n, negated version of the counter channel's dedicated
137 * GAT input (negated version of gate source 2).
138 * 7. OUT n-2, the non-inverted output of counter channel n-2
139 * (negated version of gate source 3).
140 * 8. "Pattern present" signal, HIGH while pattern present.
141 * 9. "Pattern occurred" latched signal, latches HIGH when pattern
143 * 10. "Pattern gone away" latched signal, latches LOW when pattern
144 * goes away after it occurred.
145 * 11. Negated "pattern present" signal, LOW while pattern present
146 * (negated version of gate source 8).
147 * 12. Negated "pattern occurred" latched signal, latches LOW when
148 * pattern occurs (negated version of gate source 9).
149 * 13. Negated "pattern gone away" latched signal, latches LOW when
150 * pattern goes away after it occurred (negated version of gate
153 * INSN_CONFIG_GET_GATE_SRC. Returns the counter channel's current gate
156 * Clock and gate interconnection notes:
158 * 1. Clock source OUT n-1 is the output of the preceding channel on the
159 * same counter subdevice if n > 0, or the output of channel 2 on the
160 * preceding counter subdevice (see note 3) if n = 0.
162 * 2. Gate source /OUT n-2 is the inverted output of channel 0 on the
163 * same counter subdevice if n = 2, or the inverted output of channel n+1
164 * on the preceding counter subdevice (see note 3) if n < 2.
166 * 3. The counter subdevices are connected in a ring, so the highest
167 * counter subdevice precedes the lowest.
169 * The 'TIMER' subdevice is a free-running 32-bit timer subdevice.
171 * The 'INTERRUPT' subdevice pretends to be a digital input subdevice. The
172 * digital inputs come from the interrupt status register. The number of
173 * channels matches the number of interrupt sources. The PC214E does not
174 * have an interrupt status register; see notes on 'INTERRUPT SOURCES'
179 * PCI215 PCIe215 PCIe236
180 * ------------- ------------- -------------
182 * 0 PPI-X-C0 PPI-X-C0 PPI-X-C0
183 * 1 PPI-X-C3 PPI-X-C3 PPI-X-C3
184 * 2 PPI-Y-C0 PPI-Y-C0 unused
185 * 3 PPI-Y-C3 PPI-Y-C3 unused
186 * 4 CTR-Z1-OUT1 CTR-Z1-OUT1 CTR-Z1-OUT1
187 * 5 CTR-Z2-OUT1 CTR-Z2-OUT1 CTR-Z2-OUT1
190 * ------------- -------------
192 * 0 PPI-X-C0 PPI-X1-C0
193 * 1 PPI-X-C3 PPI-X1-C3
194 * 2 PPI-Y-C0 PPI-Y1-C0
195 * 3 PPI-Y-C3 PPI-Y1-C3
196 * 4 PPI-Z-C0 CTR-Z1-OUT1
197 * 5 PPI-Z-C3 CTR-Z2-OUT1
199 * When an interrupt source is enabled in the interrupt source enable
200 * register, a rising edge on the source signal latches the corresponding
201 * bit to 1 in the interrupt status register.
203 * When the interrupt status register value as a whole (actually, just the
204 * 6 least significant bits) goes from zero to non-zero, the board will
205 * generate an interrupt. The interrupt will remain asserted until the
206 * interrupt status register is cleared to zero. To clear a bit to zero in
207 * the interrupt status register, the corresponding interrupt source must
208 * be disabled in the interrupt source enable register (there is no
209 * separate interrupt clear register).
213 * The driver supports a read streaming acquisition command on the
214 * 'INTERRUPT' subdevice. The channel list selects the interrupt sources
215 * to be enabled. All channels will be sampled together (convert_src ==
216 * TRIG_NOW). The scan begins a short time after the hardware interrupt
217 * occurs, subject to interrupt latencies (scan_begin_src == TRIG_EXT,
218 * scan_begin_arg == 0). The value read from the interrupt status register
219 * is packed into a short value, one bit per requested channel, in the
220 * order they appear in the channel list.
223 #include <linux/module.h>
224 #include <linux/pci.h>
225 #include <linux/interrupt.h>
227 #include "../comedidev.h"
229 #include "amplc_dio200.h"
232 * Board descriptions.
235 enum dio200_pci_model {
243 static const struct dio200_board dio200_pci_boards[] = {
246 .bustype = pci_bustype,
248 .mainsize = DIO200_IO_SIZE,
251 .sdtype = {sd_8255, sd_8255, sd_8254, sd_8254, sd_intr},
252 .sdinfo = {0x00, 0x08, 0x10, 0x14, 0x3F},
254 .has_clk_gat_sce = true,
259 .bustype = pci_bustype,
261 .mainsize = DIO200_IO_SIZE,
264 .sdtype = {sd_8255, sd_8255, sd_8255, sd_intr},
265 .sdinfo = {0x00, 0x08, 0x10, 0x3F},
271 .bustype = pci_bustype,
274 .mainsize = DIO200_PCIE_IO_SIZE,
277 .sdtype = {sd_8255, sd_none, sd_8255, sd_none,
278 sd_8254, sd_8254, sd_timer, sd_intr},
279 .sdinfo = {0x00, 0x00, 0x08, 0x00,
280 0x10, 0x14, 0x00, 0x3F},
282 .has_clk_gat_sce = true,
283 .has_enhancements = true,
288 .bustype = pci_bustype,
291 .mainsize = DIO200_PCIE_IO_SIZE,
294 .sdtype = {sd_8255, sd_none, sd_none, sd_none,
295 sd_8254, sd_8254, sd_timer, sd_intr},
296 .sdinfo = {0x00, 0x00, 0x00, 0x00,
297 0x10, 0x14, 0x00, 0x3F},
299 .has_clk_gat_sce = true,
300 .has_enhancements = true,
305 .bustype = pci_bustype,
308 .mainsize = DIO200_PCIE_IO_SIZE,
311 .sdtype = {sd_8255, sd_8255, sd_8255, sd_8255,
312 sd_8254, sd_8254, sd_timer, sd_intr},
313 .sdinfo = {0x00, 0x04, 0x08, 0x0C,
314 0x10, 0x14, 0x00, 0x3F},
316 .has_clk_gat_sce = true,
317 .has_enhancements = true,
323 * This function does some special set-up for the PCIe boards
324 * PCIe215, PCIe236, PCIe296.
326 static int dio200_pcie_board_setup(struct comedi_device *dev)
328 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
329 void __iomem *brbase;
332 * The board uses Altera Cyclone IV with PCI-Express hard IP.
333 * The FPGA configuration has the PCI-Express Avalon-MM Bridge
334 * Control registers in PCI BAR 0, offset 0, and the length of
335 * these registers is 0x4000.
337 * We need to write 0x80 to the "Avalon-MM to PCI-Express Interrupt
338 * Enable" register at offset 0x50 to allow generation of PCIe
339 * interrupts when RXmlrq_i is asserted in the SOPC Builder system.
341 if (pci_resource_len(pcidev, 0) < 0x4000) {
342 dev_err(dev->class_dev, "error! bad PCI region!\n");
345 brbase = pci_ioremap_bar(pcidev, 0);
347 dev_err(dev->class_dev, "error! failed to map registers!\n");
350 writel(0x80, brbase + 0x50);
352 /* Enable "enhanced" features of board. */
353 amplc_dio200_set_enhance(dev, 1);
357 static int dio200_pci_auto_attach(struct comedi_device *dev,
358 unsigned long context_model)
360 struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
361 const struct dio200_board *thisboard = NULL;
362 struct dio200_private *devpriv;
366 if (context_model < ARRAY_SIZE(dio200_pci_boards))
367 thisboard = &dio200_pci_boards[context_model];
370 dev->board_ptr = thisboard;
371 dev->board_name = thisboard->name;
373 dev_info(dev->class_dev, "%s: attach pci %s (%s)\n",
374 dev->driver->driver_name, pci_name(pci_dev), dev->board_name);
376 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
380 ret = comedi_pci_enable(dev);
384 bar = thisboard->mainbar;
385 if (pci_resource_len(pci_dev, bar) < thisboard->mainsize) {
386 dev_err(dev->class_dev, "error! PCI region size too small!\n");
389 if (pci_resource_flags(pci_dev, bar) & IORESOURCE_MEM) {
390 dev->mmio = pci_ioremap_bar(pci_dev, bar);
392 dev_err(dev->class_dev,
393 "error! cannot remap registers\n");
397 dev->iobase = pci_resource_start(pci_dev, bar);
399 switch (context_model) {
403 ret = dio200_pcie_board_setup(dev);
410 return amplc_dio200_common_attach(dev, pci_dev->irq, IRQF_SHARED);
413 static void dio200_pci_detach(struct comedi_device *dev)
415 amplc_dio200_common_detach(dev);
418 comedi_pci_disable(dev);
421 static struct comedi_driver dio200_pci_comedi_driver = {
422 .driver_name = "amplc_dio200_pci",
423 .module = THIS_MODULE,
424 .auto_attach = dio200_pci_auto_attach,
425 .detach = dio200_pci_detach,
428 static const struct pci_device_id dio200_pci_table[] = {
429 { PCI_VDEVICE(AMPLICON, 0x000b), pci215_model },
430 { PCI_VDEVICE(AMPLICON, 0x000a), pci272_model },
431 { PCI_VDEVICE(AMPLICON, 0x0011), pcie236_model },
432 { PCI_VDEVICE(AMPLICON, 0x0012), pcie215_model },
433 { PCI_VDEVICE(AMPLICON, 0x0014), pcie296_model },
437 MODULE_DEVICE_TABLE(pci, dio200_pci_table);
439 static int dio200_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
441 return comedi_pci_auto_config(dev, &dio200_pci_comedi_driver,
445 static struct pci_driver dio200_pci_pci_driver = {
446 .name = "amplc_dio200_pci",
447 .id_table = dio200_pci_table,
448 .probe = dio200_pci_probe,
449 .remove = comedi_pci_auto_unconfig,
451 module_comedi_pci_driver(dio200_pci_comedi_driver, dio200_pci_pci_driver);
453 MODULE_AUTHOR("Comedi http://www.comedi.org");
454 MODULE_DESCRIPTION("Comedi driver for Amplicon 200 Series PCI(e) DIO boards");
455 MODULE_LICENSE("GPL");