// SPDX-License-Identifier: GPL-2.0+
/*
* comedi/drivers/dt9812.c
* COMEDI driver for DataTranslation DT9812 USB module
*
* Copyright (C) 2005 Anders Blomdell <[email protected]>
*
* COMEDI - Linux Control and Measurement Device Interface
*/
/*
* Driver: dt9812
* Description: Data Translation DT9812 USB module
* Devices: [Data Translation] DT9812 (dt9812)
* Author: [email protected] (Anders Blomdell)
* Status: in development
* Updated: Sun Nov 20 20:18:34 EST 2005
*
* This driver works, but bulk transfers not implemented. Might be a
* starting point for someone else. I found out too late that USB has
* too high latencies (>1 ms) for my needs.
*/
/*
* Nota Bene:
* 1. All writes to command pipe has to be 32 bytes (ISP1181B SHRTP=0 ?)
* 2. The DDK source (as of sep 2005) is in error regarding the
* input MUX bits (example code says P4, but firmware schematics
* says P1).
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/comedi/comedi_usb.h>
#define DT9812_DIAGS_BOARD_INFO_ADDR 0xFBFF
#define DT9812_MAX_WRITE_CMD_PIPE_SIZE 32
#define DT9812_MAX_READ_CMD_PIPE_SIZE 32
/* usb_bulk_msg() timeout in milliseconds */
#define DT9812_USB_TIMEOUT 1000
/*
* See Silican Laboratories C8051F020/1/2/3 manual
*/
#define F020_SFR_P4 0x84
#define F020_SFR_P1 0x90
#define F020_SFR_P2 0xa0
#define F020_SFR_P3 0xb0
#define F020_SFR_AMX0CF 0xba
#define F020_SFR_AMX0SL 0xbb
#define F020_SFR_ADC0CF 0xbc
#define F020_SFR_ADC0L 0xbe
#define F020_SFR_ADC0H 0xbf
#define F020_SFR_DAC0L 0xd2
#define F020_SFR_DAC0H 0xd3
#define F020_SFR_DAC0CN 0xd4
#define F020_SFR_DAC1L 0xd5
#define F020_SFR_DAC1H 0xd6
#define F020_SFR_DAC1CN 0xd7
#define F020_SFR_ADC0CN 0xe8
#define F020_MASK_ADC0CF_AMP0GN0 0x01
#define F020_MASK_ADC0CF_AMP0GN1 0x02
#define F020_MASK_ADC0CF_AMP0GN2 0x04
#define F020_MASK_ADC0CN_AD0EN 0x80
#define F020_MASK_ADC0CN_AD0INT 0x20
#define F020_MASK_ADC0CN_AD0BUSY 0x10
#define F020_MASK_DACXCN_DACXEN 0x80
enum {
/* A/D D/A DI DO CT */
DT9812_DEVID_DT9812_10, /* 8 2 8 8 1 +/- 10V */
DT9812_DEVID_DT9812_2PT5, /* 8 2 8 8 1 0-2.44V */
};
enum dt9812_gain {
DT9812_GAIN_0PT25 = 1,
DT9812_GAIN_0PT5 = 2,
DT9812_GAIN_1 = 4,
DT9812_GAIN_2 = 8,
DT9812_GAIN_4 = 16,
DT9812_GAIN_8 = 32,
DT9812_GAIN_16 = 64,
};
enum {
DT9812_LEAST_USB_FIRMWARE_CMD_CODE = 0,
/* Write Flash memory */
DT9812_W_FLASH_DATA = 0,
/* Read Flash memory misc config info */
DT9812_R_FLASH_DATA = 1,
/*
* Register read/write commands for processor
*/
/* Read a single byte of USB memory */
DT9812_R_SINGLE_BYTE_REG = 2,
/* Write a single byte of USB memory */
DT9812_W_SINGLE_BYTE_REG = 3,
/* Multiple Reads of USB memory */
DT9812_R_MULTI_BYTE_REG = 4,
/* Multiple Writes of USB memory */
DT9812_W_MULTI_BYTE_REG = 5,
/* Read, (AND) with mask, OR value, then write (single) */
DT9812_RMW_SINGLE_BYTE_REG = 6,
/* Read, (AND) with mask, OR value, then write (multiple) */
DT9812_RMW_MULTI_BYTE_REG = 7,
/*
* Register read/write commands for SMBus
*/
/* Read a single byte of SMBus */
DT9812_R_SINGLE_BYTE_SMBUS = 8,
/* Write a single byte of SMBus */
DT9812_W_SINGLE_BYTE_SMBUS = 9,
/* Multiple Reads of SMBus */
DT9812_R_MULTI_BYTE_SMBUS = 10,
/* Multiple Writes of SMBus */
DT9812_W_MULTI_BYTE_SMBUS = 11,
/*
* Register read/write commands for a device
*/
/* Read a single byte of a device */
DT9812_R_SINGLE_BYTE_DEV = 12,
/* Write a single byte of a device */
DT9812_W_SINGLE_BYTE_DEV = 13,
/* Multiple Reads of a device */
DT9812_R_MULTI_BYTE_DEV = 14,
/* Multiple Writes of a device */
DT9812_W_MULTI_BYTE_DEV = 15,
/* Not sure if we'll need this */
DT9812_W_DAC_THRESHOLD = 16,
/* Set interrupt on change mask */
DT9812_W_INT_ON_CHANGE_MASK = 17,
/* Write (or Clear) the CGL for the ADC */
DT9812_W_CGL = 18,
/* Multiple Reads of USB memory */
DT9812_R_MULTI_BYTE_USBMEM = 19,
/* Multiple Writes to USB memory */
DT9812_W_MULTI_BYTE_USBMEM = 20,
/* Issue a start command to a given subsystem */
DT9812_START_SUBSYSTEM = 21,
/* Issue a stop command to a given subsystem */
DT9812_STOP_SUBSYSTEM = 22,
/* calibrate the board using CAL_POT_CMD */
DT9812_CALIBRATE_POT = 23,
/* set the DAC FIFO size */
DT9812_W_DAC_FIFO_SIZE = 24,
/* Write or Clear the CGL for the DAC */
DT9812_W_CGL_DAC = 25,
/* Read a single value from a subsystem */
DT9812_R_SINGLE_VALUE_CMD = 26,
/* Write a single value to a subsystem */
DT9812_W_SINGLE_VALUE_CMD = 27,
/* Valid DT9812_USB_FIRMWARE_CMD_CODE's will be less than this number */
DT9812_MAX_USB_FIRMWARE_CMD_CODE,
};
struct dt9812_flash_data {
__le16 numbytes;
__le16 address;
};
#define DT9812_MAX_NUM_MULTI_BYTE_RDS \
((DT9812_MAX_WRITE_CMD_PIPE_SIZE - 4 - 1) / sizeof(u8))
struct dt9812_read_multi {
u8 count;
u8 address[DT9812_MAX_NUM_MULTI_BYTE_RDS];
};
struct dt9812_write_byte {
u8 address;
u8 value;
};
#define DT9812_MAX_NUM_MULTI_BYTE_WRTS \
((DT9812_MAX_WRITE_CMD_PIPE_SIZE - 4 - 1) / \
sizeof(struct dt9812_write_byte))
struct dt9812_write_multi {
u8 count;
struct dt9812_write_byte write[DT9812_MAX_NUM_MULTI_BYTE_WRTS];
};
struct dt9812_rmw_byte {
u8 address;
u8 and_mask;
u8 or_value;
};
#define DT9812_MAX_NUM_MULTI_BYTE_RMWS \
((DT9812_MAX_WRITE_CMD_PIPE_SIZE - 4 - 1) / \
sizeof(struct dt9812_rmw_byte))
struct dt9812_rmw_multi {
u8 count;
struct dt9812_rmw_byte rmw[DT9812_MAX_NUM_MULTI_BYTE_RMWS];
};
struct dt9812_usb_cmd {
__le32 cmd;
union {
struct dt9812_flash_data flash_data_info;
struct dt9812_read_multi read_multi_info;
struct dt9812_write_multi write_multi_info;
struct dt9812_rmw_multi rmw_multi_info;
} u;
};
struct dt9812_private {
struct mutex mut;
struct {
__u8 addr;
size_t size;
} cmd_wr, cmd_rd;
u16 device;
};
static int dt9812_read_info(struct comedi_device *dev,
int offset, void *buf, size_t buf_size)
{
struct usb_device *usb = comedi_to_usb_dev(dev);
struct dt9812_private *devpriv = dev->private;
struct dt9812_usb_cmd *cmd;
size_t tbuf_size;
int count, ret;
void *tbuf;
tbuf_size = max(sizeof(*cmd), buf_size);
tbuf = kzalloc(tbuf_size, GFP_KERNEL);
if (!tbuf)
return -ENOMEM;
cmd = tbuf;
cmd->cmd = cpu_to_le32(DT9812_R_FLASH_DATA);
cmd->u.flash_data_info.address =
cpu_to_le16(DT9812_DIAGS_BOARD_INFO_ADDR + offset);
cmd->u.flash_data_info.numbytes = cpu_to_le16(buf_size);
/* DT9812 only responds to 32 byte writes!! */
ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
cmd, sizeof(*cmd), &count, DT9812_USB_TIMEOUT);
if (ret)
goto out;
ret = usb_bulk_msg(usb, usb_rcvbulkpipe(usb, devpriv->cmd_rd.addr),
tbuf, buf_size, &count, DT9812_USB_TIMEOUT);
if (!ret) {
if (count == buf_size)
memcpy(buf, tbuf, buf_size);
else
ret = -EREMOTEIO;
}
out:
kfree(tbuf);
return ret;
}
static int dt9812_read_multiple_registers(struct comedi_device *dev,
int reg_count, u8 *address,
u8 *value)
{
struct usb_device *usb = comedi_to_usb_dev(dev);
struct dt9812_private *devpriv = dev->private;
struct dt9812_usb_cmd *cmd;
int i, count, ret;
size_t buf_size;
void *buf;
buf_size = max_t(size_t, sizeof(*cmd), reg_count);
buf = kzalloc(buf_size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
cmd = buf;
cmd->cmd = cpu_to_le32(DT9812_R_MULTI_BYTE_REG);
cmd->u.read_multi_info.count = reg_count;
for (i = 0; i < reg_count; i++)
cmd->u.read_multi_info.address[i] = address[i];
/* DT9812 only responds to 32 byte writes!! */
ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
cmd, sizeof(*cmd), &count, DT9812_USB_TIMEOUT);
if (ret)
goto out;
ret = usb_bulk_msg(usb, usb_rcvbulkpipe(usb, devpriv->cmd_rd.addr),
buf, reg_count, &count, DT9812_USB_TIMEOUT);
if (!ret) {
if (count == reg_count)
memcpy(value, buf, reg_count);
else
ret = -EREMOTEIO;
}
out:
kfree(buf);
return ret;
}
static int dt9812_write_multiple_registers(struct comedi_device *dev,
int reg_count, u8 *address,
u8 *value)
{
struct usb_device *usb = comedi_to_usb_dev(dev);
struct dt9812_private *devpriv = dev->private;
struct dt9812_usb_cmd *cmd;
int i, count;
int ret;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd)
return -ENOMEM;
cmd->cmd = cpu_to_le32(DT9812_W_MULTI_BYTE_REG);
cmd->u.read_multi_info.count = reg_count;
for (i = 0; i < reg_count; i++) {
cmd->u.write_multi_info.write[i].address = address[i];
cmd->u.write_multi_info.write[i].value = value[i];
}
/* DT9812 only responds to 32 byte writes!! */
ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
cmd, sizeof(*cmd), &count, DT9812_USB_TIMEOUT);
kfree(cmd);
return ret;
}
static int dt9812_rmw_multiple_registers(struct comedi_device *dev,
int reg_count,
struct dt9812_rmw_byte *rmw)
{
struct usb_device *usb = comedi_to_usb_dev(dev);
struct dt9812_private *devpriv = dev->private;
struct dt9812_usb_cmd *cmd;
int i, count;
int ret;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd)
return -ENOMEM;
cmd->cmd = cpu_to_le32(DT9812_RMW_MULTI_BYTE_REG);
cmd->u.rmw_multi_info.count = reg_count;
for (i = 0; i < reg_count; i++)
cmd->u.rmw_multi_info.rmw[i] = rmw[i];
/* DT9812 only responds to 32 byte writes!! */
ret = usb_bulk_msg(usb, usb_sndbulkpipe(usb, devpriv->cmd_wr.addr),
cmd, sizeof(*cmd), &count, DT9812_USB_TIMEOUT);
kfree(cmd);
return ret;
}
static int dt9812_digital_in(struct comedi_device *dev, u8 *bits)
{
struct dt9812_private *devpriv = dev->private;
u8 reg[2] = { F020_SFR_P3, F020_SFR_P1 };
u8 value[2];
int ret;
mutex_lock(&devpriv->mut);
ret = dt9812_read_multiple_registers(dev, 2, reg, value);
if (ret == 0) {
/*
* bits 0-6 in F020_SFR_P3 are bits 0-6 in the digital
* input port bit 3 in F020_SFR_P1 is bit 7 in the
* digital input port
*/
*bits = (value[0] & 0x7f) | ((value[1] & 0x08) << 4);
}
mutex_unlock(&devpriv->mut);
return ret;
}
static int dt9812_digital_out(struct comedi_device *dev, u8 bits)
{
struct dt9812_private *devpriv = dev->private;
u8 reg[1] = { F020_SFR_P2 };
u8 value[1] = { bits };
int ret;
mutex_lock(&devpriv->mut);
ret = dt9812_write_multiple_registers(dev, 1, reg, value);
mutex_unlock(&devpriv->mut);
return ret;
}
static void dt9812_configure_mux(struct comedi_device *dev,
struct dt9812_rmw_byte *rmw, int channel)
{
struct dt9812_private *devpriv = dev->private;
if (devpriv->device == DT9812_DEVID_DT9812_10) {
/* In the DT9812/10V MUX is selected by P1.5-7 */
rmw->address = F020_SFR_P1;
rmw->and_mask = 0xe0;
rmw->or_value = channel << 5;
} else {
/* In the DT9812/2.5V, internal mux is selected by bits 0:2 */
rmw->address = F020_SFR_AMX0SL;
rmw->and_mask = 0xff;
rmw->or_value = channel & 0x07;
}
}
static void dt9812_configure_gain(struct comedi_device *dev,
struct dt9812_rmw_byte *rmw,
enum dt9812_gain gain)
{
struct dt9812_private *devpriv = dev->private;
/* In the DT9812/10V, there is an external gain of 0.5 */
if (devpriv->device == DT9812_DEVID_DT9812_10)
gain <<= 1;
rmw->address = F020_SFR_ADC0CF;
rmw->and_mask = F020_MASK_ADC0CF_AMP0GN2 |
F020_MASK_ADC0CF_AMP0GN1 |
F020_MASK_ADC0CF_AMP0GN0;
switch (gain) {
/*
* 000 -> Gain = 1
* 001 -> Gain = 2
* 010 -> Gain = 4
* 011 -> Gain = 8
* 10x -> Gain = 16
* 11x -> Gain = 0.5
*/
case DT9812_GAIN_0PT5:
rmw->or_value = F020_MASK_ADC0CF_AMP0GN2 |
F020_MASK_ADC0CF_AMP0GN1;
break;
default:
/* this should never happen, just use a gain of 1 */
case DT9812_GAIN_1:
rmw->or_value = 0x00;
break;
case DT9812_GAIN_2:
rmw->or_value = F020_MASK_ADC0CF_AMP0GN0;
break;
case DT9812_GAIN_4:
rmw->or_value = F020_MASK_ADC0CF_AMP0GN1;
break;
case DT9812_GAIN_8:
rmw->or_value = F020_MASK_ADC0CF_AMP0GN1 |
F020_MASK_ADC0CF_AMP0GN0;
break;
case DT9812_GAIN_16:
rmw->or_value = F020_MASK_ADC0CF_AMP0GN2;
break;
}
}
static int dt9812_analog_in(struct comedi_device *dev,
int channel, u16 *value, enum dt9812_gain gain)
{
struct dt9812_private *devpriv = dev->private;
struct dt9812_rmw_byte rmw[3];
u8 reg[3] = {
F020_SFR_ADC0CN,
F020_SFR_ADC0H,
F020_SFR_ADC0L
};
u8 val[3];
int ret;
mutex_lock(&devpriv->mut);
/* 1 select the gain */
dt9812_configure_gain(dev, &rmw[0], gain);
/* 2 set the MUX to select the channel */
dt9812_configure_mux(dev, &rmw[1], channel);
/* 3 start conversion */
rmw[2].address = F020_SFR_ADC0CN;
rmw[2].and_mask = 0xff;
rmw[2].or_value = F020_MASK_ADC0CN_AD0EN | F020_MASK_ADC0CN_AD0BUSY;
ret = dt9812_rmw_multiple_registers(dev, 3, rmw);
if (ret)
goto exit;
/* read the status and ADC */
ret = dt9812_read_multiple_registers(dev, 3, reg, val);
if (ret)
goto exit;
/*
* An ADC conversion takes 16 SAR clocks cycles, i.e. about 9us.
* Therefore, between the instant that AD0BUSY was set via
* dt9812_rmw_multiple_registers and the read of AD0BUSY via
* dt9812_read_multiple_registers, the conversion should be complete
* since these two operations require two USB transactions each taking
* at least a millisecond to complete. However, lets make sure that
* conversion is finished.
*/
if ((val[0] & (F020_MASK_ADC0CN_AD0INT | F020_MASK_ADC0CN_AD0BUSY)) ==
F020_MASK_ADC0CN_AD0INT) {
switch (devpriv->device) {
case DT9812_DEVID_DT9812_10:
/*
* For DT9812-10V the personality module set the
* encoding to 2's complement. Hence, convert it before
* returning it
*/
*value = ((val[1] << 8) | val[2]) + 0x800;
break;
case DT9812_DEVID_DT9812_2PT5:
*value = (val[1] << 8) | val[2];
break;
}
}
exit:
mutex_unlock(&devpriv->mut);
return ret;
}
static int dt9812_analog_out(struct comedi_device *dev, int channel, u16 value)
{
struct dt9812_private *devpriv = dev->private;
struct dt9812_rmw_byte rmw[3];
int ret;
mutex_lock(&devpriv->mut);
switch (channel) {
case 0:
/* 1. Set DAC mode */
rmw[0].address = F020_SFR_DAC0CN;
rmw[0].and_mask = 0xff;
rmw[0].or_value = F020_MASK_DACXCN_DACXEN;
/* 2. load lsb of DAC value first */
rmw[1].address = F020_SFR_DAC0L;
rmw[1].and_mask = 0xff;
rmw[1].or_value = value & 0xff;
/* 3. load msb of DAC value next to latch the 12-bit value */
rmw[2].address = F020_SFR_DAC0H;
rmw[2].and_mask = 0xff;
rmw[2].or_value = (value >> 8) & 0xf;
break;
case 1:
/* 1. Set DAC mode */
rmw[0].address = F020_SFR_DAC1CN;
rmw[0].and_mask = 0xff;
rmw[0].or_value = F020_MASK_DACXCN_DACXEN;
/* 2. load lsb of DAC value first */
rmw[1].address = F020_SFR_DAC1L;
rmw[1].and_mask = 0xff;
rmw[1].or_value = value & 0xff;
/* 3. load msb of DAC value next to latch the 12-bit value */
rmw[2].address = F020_SFR_DAC1H;
rmw[2].and_mask = 0xff;
rmw[2].or_value = (value >> 8) & 0xf;
break;
}
ret = dt9812_rmw_multiple_registers(dev, 3, rmw);
mutex_unlock(&devpriv->mut);
return ret;
}
static int dt9812_di_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
u8 bits = 0;
int ret;
ret = dt9812_digital_in(dev, &bits);
if (ret)
return ret;
data[1] = bits;
return insn->n;
}
static int dt9812_do_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
if (comedi_dio_update_state(s, data))
dt9812_digital_out(dev, s->state);
data[1] = s->state;
return insn->n;
}
static int dt9812_ai_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
unsigned int chan = CR_CHAN(insn->chanspec);
u16 val = 0;
int ret;
int i;
for (i = 0; i < insn->n; i++) {
ret = dt9812_analog_in(dev, chan, &val, DT9812_GAIN_1);
if (ret)
return ret;
data[i] = val;
}
return insn->n;
}
static int dt9812_ao_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
struct dt9812_private *devpriv = dev->private;
int ret;
mutex_lock(&devpriv->mut);
ret = comedi_readback_insn_read(dev, s, insn, data);
mutex_unlock(&devpriv->mut);
return ret;
}
static int dt9812_ao_insn_write(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
unsigned int chan = CR_CHAN(insn->chanspec);
int i;
for (i = 0; i < insn->n; i++) {
unsigned int val = data[i];
int ret;
ret = dt9812_analog_out(dev, chan, val);
if (ret)
return ret;
s->readback[chan] = val;
}
return insn->n;
}
static int dt9812_find_endpoints(struct comedi_device *dev)
{
struct usb_interface *intf = comedi_to_usb_interface(dev);
struct usb_host_interface *host = intf->cur_altsetting;
struct dt9812_private *devpriv = dev->private;
struct usb_endpoint_descriptor *ep;
int i;
if (host->desc.bNumEndpoints != 5) {
dev_err(dev->class_dev, "Wrong number of endpoints\n");
return -ENODEV;
}
for (i = 0; i < host->desc.bNumEndpoints; ++i) {
int dir = -1;
ep = &host->endpoint[i].desc;
switch (i) {
case 0:
/* unused message pipe */
dir = USB_DIR_IN;
break;
case 1:
dir = USB_DIR_OUT;
devpriv->cmd_wr.addr = ep->bEndpointAddress;
devpriv->cmd_wr.size = usb_endpoint_maxp(ep);
break;
case 2:
dir = USB_DIR_IN;
devpriv->cmd_rd.addr = ep->bEndpointAddress;
devpriv->cmd_rd.size = usb_endpoint_maxp(ep);
break;
case 3:
/* unused write stream */
dir = USB_DIR_OUT;
break;
case 4:
/* unused read stream */
dir = USB_DIR_IN;
break;
}
if ((ep->bEndpointAddress & USB_DIR_IN) != dir) {
dev_err(dev->class_dev,
"Endpoint has wrong direction\n");
return -ENODEV;
}
}
return 0;
}
static int dt9812_reset_device(struct comedi_device *dev)
{
struct usb_device *usb = comedi_to_usb_dev(dev);
struct dt9812_private *devpriv = dev->private;
u32 serial;
u16 vendor;
u16 product;
u8 tmp8;
__le16 tmp16;
__le32 tmp32;
int ret;
int i;
ret = dt9812_read_info(dev, 0, &tmp8, sizeof(tmp8));
if (ret) {
/*
* Seems like a configuration reset is necessary if driver is
* reloaded while device is attached
*/
usb_reset_configuration(usb);
for (i = 0; i < 10; i++) {
ret = dt9812_read_info(dev, 1, &tmp8, sizeof(tmp8));
if (ret == 0)
break;
}
if (ret) {
dev_err(dev->class_dev,
"unable to reset configuration\n");
return ret;
}
}
ret = dt9812_read_info(dev, 1, &tmp16, sizeof(tmp16));
if (ret) {
dev_err(dev->class_dev, "failed to read vendor id\n");
return ret;
}
vendor = le16_to_cpu(tmp16);
ret = dt9812_read_info(dev, 3, &tmp16, sizeof(tmp16));
if (ret) {
dev_err(dev->class_dev, "failed to read product id\n");
return ret;
}
product = le16_to_cpu(tmp16);
ret = dt9812_read_info(dev, 5, &tmp16, sizeof(tmp16));
if (ret) {
dev_err(dev->class_dev, "failed to read device id\n");
return ret;
}
devpriv->device = le16_to_cpu(tmp16);
ret = dt9812_read_info(dev, 7, &tmp32, sizeof(tmp32));
if (ret) {
dev_err(dev->class_dev, "failed to read serial number\n");
return ret;
}
serial = le32_to_cpu(tmp32);
/* let the user know what node this device is now attached to */
dev_info(dev->class_dev, "USB DT9812 (%4.4x.%4.4x.%4.4x) #0x%8.8x\n",
vendor, product, devpriv->device, serial);
if (devpriv->device != DT9812_DEVID_DT9812_10 &&
devpriv->device != DT9812_DEVID_DT9812_2PT5) {
dev_err(dev->class_dev, "Unsupported device!\n");
return -EINVAL;
}
return 0;
}
static int dt9812_auto_attach(struct comedi_device *dev,
unsigned long context)
{
struct usb_interface *intf = comedi_to_usb_interface(dev);
struct dt9812_private *devpriv;
struct comedi_subdevice *s;
bool is_unipolar;
int ret;
int i;
devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
if (!devpriv)
return -ENOMEM;
mutex_init(&devpriv->mut);
usb_set_intfdata(intf, devpriv);
ret = dt9812_find_endpoints(dev);
if (ret)
return ret;
ret = dt9812_reset_device(dev);
if (ret)
return ret;
is_unipolar = (devpriv->device == DT9812_DEVID_DT9812_2PT5);
ret = comedi_alloc_subdevices(dev, 4);
if (ret)
return ret;
/* Digital Input subdevice */
s = &dev->subdevices[0];
s->type = COMEDI_SUBD_DI;
s->subdev_flags = SDF_READABLE;
s->n_chan = 8;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = dt9812_di_insn_bits;
/* Digital Output subdevice */
s = &dev->subdevices[1];
s->type = COMEDI_SUBD_DO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 8;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = dt9812_do_insn_bits;
/* Analog Input subdevice */
s = &dev->subdevices[2];
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE | SDF_GROUND;
s->n_chan = 8;
s->maxdata = 0x0fff;
s->range_table = is_unipolar ? &range_unipolar2_5 : &range_bipolar10;
s->insn_read = dt9812_ai_insn_read;
/* Analog Output subdevice */
s = &dev->subdevices[3];
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 2;
s->maxdata = 0x0fff;
s->range_table = is_unipolar ? &range_unipolar2_5 : &range_bipolar10;
s->insn_write = dt9812_ao_insn_write;
s->insn_read = dt9812_ao_insn_read;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
for (i = 0; i < s->n_chan; i++)
s->readback[i] = is_unipolar ? 0x0000 : 0x0800;
return 0;
}
static void dt9812_detach(struct comedi_device *dev)
{
struct usb_interface *intf = comedi_to_usb_interface(dev);
struct dt9812_private *devpriv = dev->private;
if (!devpriv)
return;
mutex_destroy(&devpriv->mut);
usb_set_intfdata(intf, NULL);
}
static struct comedi_driver dt9812_driver = {
.driver_name = "dt9812",
.module = THIS_MODULE,
.auto_attach = dt9812_auto_attach,
.detach = dt9812_detach,
};
static int dt9812_usb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
return comedi_usb_auto_config(intf, &dt9812_driver, id->driver_info);
}
static const struct usb_device_id dt9812_usb_table[] = {
{ USB_DEVICE(0x0867, 0x9812) },
{ }
};
MODULE_DEVICE_TABLE(usb, dt9812_usb_table);
static struct usb_driver dt9812_usb_driver = {
.name = "dt9812",
.id_table = dt9812_usb_table,
.probe = dt9812_usb_probe,
.disconnect = comedi_usb_auto_unconfig,
};
module_comedi_usb_driver(dt9812_driver, dt9812_usb_driver);
MODULE_AUTHOR("Anders Blomdell <[email protected]>");
MODULE_DESCRIPTION("Comedi DT9812 driver");
MODULE_LICENSE("GPL");
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