// SPDX-License-Identifier: GPL-2.0+
/* comedi/drivers/amplc_dio200_pci.c
*
* Driver for Amplicon PCI215, PCI272, PCIe215, PCIe236, PCIe296.
*
* Copyright (C) 2005-2013 MEV Ltd. <https://www.mev.co.uk/>
*
* COMEDI - Linux Control and Measurement Device Interface
* Copyright (C) 1998,2000 David A. Schleef <[email protected]>
*/
/*
* Driver: amplc_dio200_pci
* Description: Amplicon 200 Series PCI Digital I/O
* Author: Ian Abbott <[email protected]>
* Devices: [Amplicon] PCI215 (amplc_dio200_pci), PCIe215, PCIe236,
* PCI272, PCIe296
* Updated: Mon, 18 Mar 2013 15:03:50 +0000
* Status: works
*
* Configuration options:
* none
*
* Manual configuration of PCI(e) cards is not supported; they are configured
* automatically.
*
* SUBDEVICES
*
* PCI215 PCIe215 PCIe236
* ------------- ------------- -------------
* Subdevices 5 8 8
* 0 PPI-X PPI-X PPI-X
* 1 PPI-Y UNUSED UNUSED
* 2 CTR-Z1 PPI-Y UNUSED
* 3 CTR-Z2 UNUSED UNUSED
* 4 INTERRUPT CTR-Z1 CTR-Z1
* 5 CTR-Z2 CTR-Z2
* 6 TIMER TIMER
* 7 INTERRUPT INTERRUPT
*
*
* PCI272 PCIe296
* ------------- -------------
* Subdevices 4 8
* 0 PPI-X PPI-X1
* 1 PPI-Y PPI-X2
* 2 PPI-Z PPI-Y1
* 3 INTERRUPT PPI-Y2
* 4 CTR-Z1
* 5 CTR-Z2
* 6 TIMER
* 7 INTERRUPT
*
* Each PPI is a 8255 chip providing 24 DIO channels. The DIO channels
* are configurable as inputs or outputs in four groups:
*
* Port A - channels 0 to 7
* Port B - channels 8 to 15
* Port CL - channels 16 to 19
* Port CH - channels 20 to 23
*
* Only mode 0 of the 8255 chips is supported.
*
* Each CTR is a 8254 chip providing 3 16-bit counter channels. Each
* channel is configured individually with INSN_CONFIG instructions. The
* specific type of configuration instruction is specified in data[0].
* Some configuration instructions expect an additional parameter in
* data[1]; others return a value in data[1]. The following configuration
* instructions are supported:
*
* INSN_CONFIG_SET_COUNTER_MODE. Sets the counter channel's mode and
* BCD/binary setting specified in data[1].
*
* INSN_CONFIG_8254_READ_STATUS. Reads the status register value for the
* counter channel into data[1].
*
* INSN_CONFIG_SET_CLOCK_SRC. Sets the counter channel's clock source as
* specified in data[1] (this is a hardware-specific value). Not
* supported on PC214E. For the other boards, valid clock sources are
* 0 to 7 as follows:
*
* 0. CLK n, the counter channel's dedicated CLK input from the SK1
* connector. (N.B. for other values, the counter channel's CLKn
* pin on the SK1 connector is an output!)
* 1. Internal 10 MHz clock.
* 2. Internal 1 MHz clock.
* 3. Internal 100 kHz clock.
* 4. Internal 10 kHz clock.
* 5. Internal 1 kHz clock.
* 6. OUT n-1, the output of counter channel n-1 (see note 1 below).
* 7. Ext Clock, the counter chip's dedicated Ext Clock input from
* the SK1 connector. This pin is shared by all three counter
* channels on the chip.
*
* For the PCIe boards, clock sources in the range 0 to 31 are allowed
* and the following additional clock sources are defined:
*
* 8. HIGH logic level.
* 9. LOW logic level.
* 10. "Pattern present" signal.
* 11. Internal 20 MHz clock.
*
* INSN_CONFIG_GET_CLOCK_SRC. Returns the counter channel's current
* clock source in data[1]. For internal clock sources, data[2] is set
* to the period in ns.
*
* INSN_CONFIG_SET_GATE_SRC. Sets the counter channel's gate source as
* specified in data[2] (this is a hardware-specific value). Not
* supported on PC214E. For the other boards, valid gate sources are 0
* to 7 as follows:
*
* 0. VCC (internal +5V d.c.), i.e. gate permanently enabled.
* 1. GND (internal 0V d.c.), i.e. gate permanently disabled.
* 2. GAT n, the counter channel's dedicated GAT input from the SK1
* connector. (N.B. for other values, the counter channel's GATn
* pin on the SK1 connector is an output!)
* 3. /OUT n-2, the inverted output of counter channel n-2 (see note
* 2 below).
* 4. Reserved.
* 5. Reserved.
* 6. Reserved.
* 7. Reserved.
*
* For the PCIe boards, gate sources in the range 0 to 31 are allowed;
* the following additional clock sources and clock sources 6 and 7 are
* (re)defined:
*
* 6. /GAT n, negated version of the counter channel's dedicated
* GAT input (negated version of gate source 2).
* 7. OUT n-2, the non-inverted output of counter channel n-2
* (negated version of gate source 3).
* 8. "Pattern present" signal, HIGH while pattern present.
* 9. "Pattern occurred" latched signal, latches HIGH when pattern
* occurs.
* 10. "Pattern gone away" latched signal, latches LOW when pattern
* goes away after it occurred.
* 11. Negated "pattern present" signal, LOW while pattern present
* (negated version of gate source 8).
* 12. Negated "pattern occurred" latched signal, latches LOW when
* pattern occurs (negated version of gate source 9).
* 13. Negated "pattern gone away" latched signal, latches LOW when
* pattern goes away after it occurred (negated version of gate
* source 10).
*
* INSN_CONFIG_GET_GATE_SRC. Returns the counter channel's current gate
* source in data[2].
*
* Clock and gate interconnection notes:
*
* 1. Clock source OUT n-1 is the output of the preceding channel on the
* same counter subdevice if n > 0, or the output of channel 2 on the
* preceding counter subdevice (see note 3) if n = 0.
*
* 2. Gate source /OUT n-2 is the inverted output of channel 0 on the
* same counter subdevice if n = 2, or the inverted output of channel n+1
* on the preceding counter subdevice (see note 3) if n < 2.
*
* 3. The counter subdevices are connected in a ring, so the highest
* counter subdevice precedes the lowest.
*
* The 'TIMER' subdevice is a free-running 32-bit timer subdevice.
*
* The 'INTERRUPT' subdevice pretends to be a digital input subdevice. The
* digital inputs come from the interrupt status register. The number of
* channels matches the number of interrupt sources. The PC214E does not
* have an interrupt status register; see notes on 'INTERRUPT SOURCES'
* below.
*
* INTERRUPT SOURCES
*
* PCI215 PCIe215 PCIe236
* ------------- ------------- -------------
* Sources 6 6 6
* 0 PPI-X-C0 PPI-X-C0 PPI-X-C0
* 1 PPI-X-C3 PPI-X-C3 PPI-X-C3
* 2 PPI-Y-C0 PPI-Y-C0 unused
* 3 PPI-Y-C3 PPI-Y-C3 unused
* 4 CTR-Z1-OUT1 CTR-Z1-OUT1 CTR-Z1-OUT1
* 5 CTR-Z2-OUT1 CTR-Z2-OUT1 CTR-Z2-OUT1
*
* PCI272 PCIe296
* ------------- -------------
* Sources 6 6
* 0 PPI-X-C0 PPI-X1-C0
* 1 PPI-X-C3 PPI-X1-C3
* 2 PPI-Y-C0 PPI-Y1-C0
* 3 PPI-Y-C3 PPI-Y1-C3
* 4 PPI-Z-C0 CTR-Z1-OUT1
* 5 PPI-Z-C3 CTR-Z2-OUT1
*
* When an interrupt source is enabled in the interrupt source enable
* register, a rising edge on the source signal latches the corresponding
* bit to 1 in the interrupt status register.
*
* When the interrupt status register value as a whole (actually, just the
* 6 least significant bits) goes from zero to non-zero, the board will
* generate an interrupt. The interrupt will remain asserted until the
* interrupt status register is cleared to zero. To clear a bit to zero in
* the interrupt status register, the corresponding interrupt source must
* be disabled in the interrupt source enable register (there is no
* separate interrupt clear register).
*
* COMMANDS
*
* The driver supports a read streaming acquisition command on the
* 'INTERRUPT' subdevice. The channel list selects the interrupt sources
* to be enabled. All channels will be sampled together (convert_src ==
* TRIG_NOW). The scan begins a short time after the hardware interrupt
* occurs, subject to interrupt latencies (scan_begin_src == TRIG_EXT,
* scan_begin_arg == 0). The value read from the interrupt status register
* is packed into a short value, one bit per requested channel, in the
* order they appear in the channel list.
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/comedi/comedi_pci.h>
#include "amplc_dio200.h"
/*
* Board descriptions.
*/
enum dio200_pci_model {
#ifdef CONFIG_HAS_IOPORT
pci215_model,
pci272_model,
#endif /* CONFIG_HAS_IOPORT */
pcie215_model,
pcie236_model,
pcie296_model
};
static const struct dio200_board dio200_pci_boards[] = {
#ifdef CONFIG_HAS_IOPORT
[pci215_model] = {
.name = "pci215",
.mainbar = 2,
.n_subdevs = 5,
.sdtype = {
sd_8255, sd_8255, sd_8254, sd_8254, sd_intr
},
.sdinfo = { 0x00, 0x08, 0x10, 0x14, 0x3f },
.has_int_sce = true,
.has_clk_gat_sce = true,
},
[pci272_model] = {
.name = "pci272",
.mainbar = 2,
.n_subdevs = 4,
.sdtype = {
sd_8255, sd_8255, sd_8255, sd_intr
},
.sdinfo = { 0x00, 0x08, 0x10, 0x3f },
.has_int_sce = true,
},
#endif /* CONFIG_HAS_IOPORT */
[pcie215_model] = {
.name = "pcie215",
.mainbar = 1,
.n_subdevs = 8,
.sdtype = {
sd_8255, sd_none, sd_8255, sd_none,
sd_8254, sd_8254, sd_timer, sd_intr
},
.sdinfo = {
0x00, 0x00, 0x08, 0x00, 0x10, 0x14, 0x00, 0x3f
},
.has_int_sce = true,
.has_clk_gat_sce = true,
.is_pcie = true,
},
[pcie236_model] = {
.name = "pcie236",
.mainbar = 1,
.n_subdevs = 8,
.sdtype = {
sd_8255, sd_none, sd_none, sd_none,
sd_8254, sd_8254, sd_timer, sd_intr
},
.sdinfo = {
0x00, 0x00, 0x00, 0x00, 0x10, 0x14, 0x00, 0x3f
},
.has_int_sce = true,
.has_clk_gat_sce = true,
.is_pcie = true,
},
[pcie296_model] = {
.name = "pcie296",
.mainbar = 1,
.n_subdevs = 8,
.sdtype = {
sd_8255, sd_8255, sd_8255, sd_8255,
sd_8254, sd_8254, sd_timer, sd_intr
},
.sdinfo = {
0x00, 0x04, 0x08, 0x0c, 0x10, 0x14, 0x00, 0x3f
},
.has_int_sce = true,
.has_clk_gat_sce = true,
.is_pcie = true,
},
};
/*
* This function does some special set-up for the PCIe boards
* PCIe215, PCIe236, PCIe296.
*/
static int dio200_pcie_board_setup(struct comedi_device *dev)
{
struct pci_dev *pcidev = comedi_to_pci_dev(dev);
void __iomem *brbase;
/*
* The board uses Altera Cyclone IV with PCI-Express hard IP.
* The FPGA configuration has the PCI-Express Avalon-MM Bridge
* Control registers in PCI BAR 0, offset 0, and the length of
* these registers is 0x4000.
*
* We need to write 0x80 to the "Avalon-MM to PCI-Express Interrupt
* Enable" register at offset 0x50 to allow generation of PCIe
* interrupts when RXmlrq_i is asserted in the SOPC Builder system.
*/
if (pci_resource_len(pcidev, 0) < 0x4000) {
dev_err(dev->class_dev, "error! bad PCI region!\n");
return -EINVAL;
}
brbase = pci_ioremap_bar(pcidev, 0);
if (!brbase) {
dev_err(dev->class_dev, "error! failed to map registers!\n");
return -ENOMEM;
}
writel(0x80, brbase + 0x50);
iounmap(brbase);
/* Enable "enhanced" features of board. */
amplc_dio200_set_enhance(dev, 1);
return 0;
}
static int dio200_pci_auto_attach(struct comedi_device *dev,
unsigned long context_model)
{
struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
const struct dio200_board *board = NULL;
unsigned int bar;
int ret;
if (context_model < ARRAY_SIZE(dio200_pci_boards))
board = &dio200_pci_boards[context_model];
if (!board)
return -EINVAL;
dev->board_ptr = board;
dev->board_name = board->name;
dev_info(dev->class_dev, "%s: attach pci %s (%s)\n",
dev->driver->driver_name, pci_name(pci_dev), dev->board_name);
ret = comedi_pci_enable(dev);
if (ret)
return ret;
bar = board->mainbar;
if (pci_resource_flags(pci_dev, bar) & IORESOURCE_MEM) {
dev->mmio = pci_ioremap_bar(pci_dev, bar);
if (!dev->mmio) {
dev_err(dev->class_dev,
"error! cannot remap registers\n");
return -ENOMEM;
}
} else if (IS_ENABLED(CONFIG_HAS_IOPORT)) {
dev->iobase = pci_resource_start(pci_dev, bar);
} else {
dev_err(dev->class_dev,
"error! need I/O port support\n");
return -ENXIO;
}
if (board->is_pcie) {
ret = dio200_pcie_board_setup(dev);
if (ret < 0)
return ret;
}
return amplc_dio200_common_attach(dev, pci_dev->irq, IRQF_SHARED);
}
static struct comedi_driver dio200_pci_comedi_driver = {
.driver_name = "amplc_dio200_pci",
.module = THIS_MODULE,
.auto_attach = dio200_pci_auto_attach,
.detach = comedi_pci_detach,
};
static const struct pci_device_id dio200_pci_table[] = {
#ifdef CONFIG_HAS_IOPORT
{ PCI_VDEVICE(AMPLICON, 0x000b), pci215_model },
{ PCI_VDEVICE(AMPLICON, 0x000a), pci272_model },
#endif /* CONFIG_HAS_IOPORT */
{ PCI_VDEVICE(AMPLICON, 0x0011), pcie236_model },
{ PCI_VDEVICE(AMPLICON, 0x0012), pcie215_model },
{ PCI_VDEVICE(AMPLICON, 0x0014), pcie296_model },
{0}
};
MODULE_DEVICE_TABLE(pci, dio200_pci_table);
static int dio200_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
return comedi_pci_auto_config(dev, &dio200_pci_comedi_driver,
id->driver_data);
}
static struct pci_driver dio200_pci_pci_driver = {
.name = "amplc_dio200_pci",
.id_table = dio200_pci_table,
.probe = dio200_pci_probe,
.remove = comedi_pci_auto_unconfig,
};
module_comedi_pci_driver(dio200_pci_comedi_driver, dio200_pci_pci_driver);
MODULE_AUTHOR("Comedi https://www.comedi.org");
MODULE_DESCRIPTION("Comedi driver for Amplicon 200 Series PCI(e) DIO boards");
MODULE_LICENSE("GPL");
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