diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/pcm3724.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/pcm3724.c | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/drivers/staging/comedi/drivers/pcm3724.c b/drivers/staging/comedi/drivers/pcm3724.c deleted file mode 100644 index 0cb1ad060402..000000000000 --- a/drivers/staging/comedi/drivers/pcm3724.c +++ /dev/null @@ -1,227 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * pcm3724.c - * Comedi driver for Advantech PCM-3724 Digital I/O board - * - * Drew Csillag <drew_csillag@yahoo.com> - */ - -/* - * Driver: pcm3724 - * Description: Advantech PCM-3724 - * Devices: [Advantech] PCM-3724 (pcm3724) - * Author: Drew Csillag <drew_csillag@yahoo.com> - * Status: tested - * - * This is driver for digital I/O boards PCM-3724 with 48 DIO. - * It needs 8255.o for operations and only immediate mode is supported. - * See the source for configuration details. - * - * Copy/pasted/hacked from pcm724.c - * - * Configuration Options: - * [0] - I/O port base address - */ - -#include <linux/module.h> -#include "../comedidev.h" - -#include "8255.h" - -/* - * Register I/O Map - * - * This board has two standard 8255 devices that provide six 8-bit DIO ports - * (48 channels total). Six 74HCT245 chips (one for each port) buffer the - * I/O lines to increase driving capability. Because the 74HCT245 is a - * bidirectional, tri-state line buffer, two additional I/O ports are used - * to control the direction of data and the enable of each port. - */ -#define PCM3724_8255_0_BASE 0x00 -#define PCM3724_8255_1_BASE 0x04 -#define PCM3724_DIO_DIR_REG 0x08 -#define PCM3724_DIO_DIR_C0_OUT BIT(0) -#define PCM3724_DIO_DIR_B0_OUT BIT(1) -#define PCM3724_DIO_DIR_A0_OUT BIT(2) -#define PCM3724_DIO_DIR_C1_OUT BIT(3) -#define PCM3724_DIO_DIR_B1_OUT BIT(4) -#define PCM3724_DIO_DIR_A1_OUT BIT(5) -#define PCM3724_GATE_CTRL_REG 0x09 -#define PCM3724_GATE_CTRL_C0_ENA BIT(0) -#define PCM3724_GATE_CTRL_B0_ENA BIT(1) -#define PCM3724_GATE_CTRL_A0_ENA BIT(2) -#define PCM3724_GATE_CTRL_C1_ENA BIT(3) -#define PCM3724_GATE_CTRL_B1_ENA BIT(4) -#define PCM3724_GATE_CTRL_A1_ENA BIT(5) - -/* used to track configured dios */ -struct priv_pcm3724 { - int dio_1; - int dio_2; -}; - -static int compute_buffer(int config, int devno, struct comedi_subdevice *s) -{ - /* 1 in io_bits indicates output */ - if (s->io_bits & 0x0000ff) { - if (devno == 0) - config |= PCM3724_DIO_DIR_A0_OUT; - else - config |= PCM3724_DIO_DIR_A1_OUT; - } - if (s->io_bits & 0x00ff00) { - if (devno == 0) - config |= PCM3724_DIO_DIR_B0_OUT; - else - config |= PCM3724_DIO_DIR_B1_OUT; - } - if (s->io_bits & 0xff0000) { - if (devno == 0) - config |= PCM3724_DIO_DIR_C0_OUT; - else - config |= PCM3724_DIO_DIR_C1_OUT; - } - return config; -} - -static void do_3724_config(struct comedi_device *dev, - struct comedi_subdevice *s, int chanspec) -{ - struct comedi_subdevice *s_dio1 = &dev->subdevices[0]; - struct comedi_subdevice *s_dio2 = &dev->subdevices[1]; - int config; - int buffer_config; - unsigned long port_8255_cfg; - - config = I8255_CTRL_CW; - buffer_config = 0; - - /* 1 in io_bits indicates output, 1 in config indicates input */ - if (!(s->io_bits & 0x0000ff)) - config |= I8255_CTRL_A_IO; - - if (!(s->io_bits & 0x00ff00)) - config |= I8255_CTRL_B_IO; - - if (!(s->io_bits & 0xff0000)) - config |= I8255_CTRL_C_HI_IO | I8255_CTRL_C_LO_IO; - - buffer_config = compute_buffer(0, 0, s_dio1); - buffer_config = compute_buffer(buffer_config, 1, s_dio2); - - if (s == s_dio1) - port_8255_cfg = dev->iobase + I8255_CTRL_REG; - else - port_8255_cfg = dev->iobase + I8255_SIZE + I8255_CTRL_REG; - - outb(buffer_config, dev->iobase + PCM3724_DIO_DIR_REG); - - outb(config, port_8255_cfg); -} - -static void enable_chan(struct comedi_device *dev, struct comedi_subdevice *s, - int chanspec) -{ - struct priv_pcm3724 *priv = dev->private; - struct comedi_subdevice *s_dio1 = &dev->subdevices[0]; - unsigned int mask; - int gatecfg; - - gatecfg = 0; - - mask = 1 << CR_CHAN(chanspec); - if (s == s_dio1) - priv->dio_1 |= mask; - else - priv->dio_2 |= mask; - - if (priv->dio_1 & 0xff0000) - gatecfg |= PCM3724_GATE_CTRL_C0_ENA; - - if (priv->dio_1 & 0xff00) - gatecfg |= PCM3724_GATE_CTRL_B0_ENA; - - if (priv->dio_1 & 0xff) - gatecfg |= PCM3724_GATE_CTRL_A0_ENA; - - if (priv->dio_2 & 0xff0000) - gatecfg |= PCM3724_GATE_CTRL_C1_ENA; - - if (priv->dio_2 & 0xff00) - gatecfg |= PCM3724_GATE_CTRL_B1_ENA; - - if (priv->dio_2 & 0xff) - gatecfg |= PCM3724_GATE_CTRL_A1_ENA; - - outb(gatecfg, dev->iobase + PCM3724_GATE_CTRL_REG); -} - -/* overriding the 8255 insn config */ -static int subdev_3724_insn_config(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - unsigned int chan = CR_CHAN(insn->chanspec); - unsigned int mask; - int ret; - - if (chan < 8) - mask = 0x0000ff; - else if (chan < 16) - mask = 0x00ff00; - else if (chan < 20) - mask = 0x0f0000; - else - mask = 0xf00000; - - ret = comedi_dio_insn_config(dev, s, insn, data, mask); - if (ret) - return ret; - - do_3724_config(dev, s, insn->chanspec); - enable_chan(dev, s, insn->chanspec); - - return insn->n; -} - -static int pcm3724_attach(struct comedi_device *dev, - struct comedi_devconfig *it) -{ - struct priv_pcm3724 *priv; - struct comedi_subdevice *s; - int ret, i; - - priv = comedi_alloc_devpriv(dev, sizeof(*priv)); - if (!priv) - return -ENOMEM; - - ret = comedi_request_region(dev, it->options[0], 0x10); - if (ret) - return ret; - - ret = comedi_alloc_subdevices(dev, 2); - if (ret) - return ret; - - for (i = 0; i < dev->n_subdevices; i++) { - s = &dev->subdevices[i]; - ret = subdev_8255_init(dev, s, NULL, i * I8255_SIZE); - if (ret) - return ret; - s->insn_config = subdev_3724_insn_config; - } - return 0; -} - -static struct comedi_driver pcm3724_driver = { - .driver_name = "pcm3724", - .module = THIS_MODULE, - .attach = pcm3724_attach, - .detach = comedi_legacy_detach, -}; -module_comedi_driver(pcm3724_driver); - -MODULE_AUTHOR("Comedi https://www.comedi.org"); -MODULE_DESCRIPTION("Comedi driver for Advantech PCM-3724 Digital I/O board"); -MODULE_LICENSE("GPL"); |