diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/dt9812.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/dt9812.c | 1162 |
1 files changed, 1162 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/dt9812.c b/drivers/staging/comedi/drivers/dt9812.c new file mode 100644 index 000000000000..f2d2173d7219 --- /dev/null +++ b/drivers/staging/comedi/drivers/dt9812.c @@ -0,0 +1,1162 @@ +/* + * comedi/drivers/dt9812.c + * COMEDI driver for DataTranslation DT9812 USB module + * + * Copyright (C) 2005 Anders Blomdell <anders.blomdell@control.lth.se> + * + * COMEDI - Linux Control and Measurement Device Interface + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +/* +Driver: dt9812 +Description: Data Translation DT9812 USB module +Author: anders.blomdell@control.lth.se (Anders Blomdell) +Status: in development +Devices: [Data Translation] DT9812 (dt9812) +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/errno.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/kref.h> +#include <linux/uaccess.h> +#include <linux/usb.h> + +#include "../comedidev.h" + +#define DT9812_DIAGS_BOARD_INFO_ADDR 0xFBFF +#define DT9812_MAX_WRITE_CMD_PIPE_SIZE 32 +#define DT9812_MAX_READ_CMD_PIPE_SIZE 32 + +/* + * 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 */ +#if 0 + DT9812_DEVID_DT9813, /* 16 2 4 4 1 +/- 10V */ + DT9812_DEVID_DT9814 /* 24 2 0 0 1 +/- 10V */ +#endif +}; + +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 { + u16 numbytes; + u16 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 { + u32 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; +#if 0 + WRITE_BYTE_INFO WriteByteInfo; + READ_BYTE_INFO ReadByteInfo; + WRITE_MULTI_INFO WriteMultiInfo; + READ_MULTI_INFO ReadMultiInfo; + RMW_BYTE_INFO RMWByteInfo; + RMW_MULTI_INFO RMWMultiInfo; + DAC_THRESHOLD_INFO DacThresholdInfo; + INT_ON_CHANGE_MASK_INFO IntOnChangeMaskInfo; + CGL_INFO CglInfo; + SUBSYSTEM_INFO SubsystemInfo; + CAL_POT_CMD CalPotCmd; + WRITE_DEV_BYTE_INFO WriteDevByteInfo; + READ_DEV_BYTE_INFO ReadDevByteInfo; + WRITE_DEV_MULTI_INFO WriteDevMultiInfo; + READ_DEV_MULTI_INFO ReadDevMultiInfo; + READ_SINGLE_VALUE_INFO ReadSingleValueInfo; + WRITE_SINGLE_VALUE_INFO WriteSingleValueInfo; +#endif +}; + +#define DT9812_NUM_SLOTS 16 + +static DECLARE_MUTEX(dt9812_mutex); + +static struct usb_device_id dt9812_table[] = { + {USB_DEVICE(0x0867, 0x9812)}, + { } /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE(usb, dt9812_table); + +struct usb_dt9812 { + struct slot_dt9812 *slot; + struct usb_device *udev; + struct usb_interface *interface; + u16 vendor; + u16 product; + u16 device; + u32 serial; + struct { + __u8 addr; + size_t size; + } message_pipe, command_write, command_read, write_stream, read_stream; + struct kref kref; + u16 analog_out_shadow[2]; + u8 digital_out_shadow; +}; + +struct comedi_dt9812 { + struct slot_dt9812 *slot; + u32 serial; +}; + +struct slot_dt9812 { + struct semaphore mutex; + u32 serial; + struct usb_dt9812 *usb; + struct comedi_dt9812 *comedi; +}; + +static const comedi_lrange dt9812_10_ain_range = { 1, { + BIP_RANGE(10), + } +}; + +static const comedi_lrange dt9812_2pt5_ain_range = { 1, { + UNI_RANGE(2.5), + } +}; + +static const comedi_lrange dt9812_10_aout_range = { 1, { + BIP_RANGE(10), + } +}; + +static const comedi_lrange dt9812_2pt5_aout_range = { 1, { + UNI_RANGE(2.5), + } +}; + +static struct slot_dt9812 dt9812[DT9812_NUM_SLOTS]; + +/* Useful shorthand access to private data */ +#define devpriv ((struct comedi_dt9812 *)dev->private) + +static inline struct usb_dt9812 *to_dt9812_dev(struct kref *d) +{ + return container_of(d, struct usb_dt9812, kref); +} + +static void dt9812_delete(struct kref *kref) +{ + struct usb_dt9812 *dev = to_dt9812_dev(kref); + + usb_put_dev(dev->udev); + kfree(dev); +} + +static int dt9812_read_info(struct usb_dt9812 *dev, int offset, void *buf, + size_t buf_size) +{ + struct dt9812_usb_cmd cmd; + int count, retval; + + 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!! */ + count = 32; + retval = usb_bulk_msg(dev->udev, + usb_sndbulkpipe(dev->udev, + dev->command_write.addr), + &cmd, 32, &count, HZ * 1); + if (retval) + return retval; + retval = usb_bulk_msg(dev->udev, + usb_rcvbulkpipe(dev->udev, + dev->command_read.addr), + buf, buf_size, &count, HZ * 1); + return retval; +} + +static int dt9812_read_multiple_registers(struct usb_dt9812 *dev, int reg_count, + u8 *address, u8 *value) +{ + struct dt9812_usb_cmd cmd; + int i, count, retval; + + 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!! */ + count = 32; + retval = usb_bulk_msg(dev->udev, + usb_sndbulkpipe(dev->udev, + dev->command_write.addr), + &cmd, 32, &count, HZ * 1); + if (retval) + return retval; + retval = usb_bulk_msg(dev->udev, + usb_rcvbulkpipe(dev->udev, + dev->command_read.addr), + value, reg_count, &count, HZ * 1); + return retval; +} + +static int dt9812_write_multiple_registers(struct usb_dt9812 *dev, + int reg_count, u8 *address, + u8 *value) +{ + struct dt9812_usb_cmd cmd; + int i, count, retval; + + 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!! */ + retval = usb_bulk_msg(dev->udev, + usb_sndbulkpipe(dev->udev, + dev->command_write.addr), + &cmd, 32, &count, HZ * 1); + return retval; +} + +static int dt9812_rmw_multiple_registers(struct usb_dt9812 *dev, int reg_count, + struct dt9812_rmw_byte *rmw) +{ + struct dt9812_usb_cmd cmd; + int i, count, retval; + + 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!! */ + retval = usb_bulk_msg(dev->udev, + usb_sndbulkpipe(dev->udev, + dev->command_write.addr), + &cmd, 32, &count, HZ * 1); + return retval; +} + +static int dt9812_digital_in(struct slot_dt9812 *slot, u8 *bits) +{ + int result = -ENODEV; + + down(&slot->mutex); + if (slot->usb) { + u8 reg[2] = { F020_SFR_P3, F020_SFR_P1 }; + u8 value[2]; + + result = dt9812_read_multiple_registers(slot->usb, 2, reg, + value); + if (result == 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); + /* printk("%2.2x, %2.2x -> %2.2x\n", + value[0], value[1], *bits); */ + } + } + up(&slot->mutex); + + return result; +} + +static int dt9812_digital_out(struct slot_dt9812 *slot, u8 bits) +{ + int result = -ENODEV; + + down(&slot->mutex); + if (slot->usb) { + u8 reg[1]; + u8 value[1]; + + reg[0] = F020_SFR_P2; + value[0] = bits; + result = dt9812_write_multiple_registers(slot->usb, 1, reg, + value); + slot->usb->digital_out_shadow = bits; + } + up(&slot->mutex); + return result; +} + +static int dt9812_digital_out_shadow(struct slot_dt9812 *slot, u8 *bits) +{ + int result = -ENODEV; + + down(&slot->mutex); + if (slot->usb) { + *bits = slot->usb->digital_out_shadow; + result = 0; + } + up(&slot->mutex); + return result; +} + +static void dt9812_configure_mux(struct usb_dt9812 *dev, + struct dt9812_rmw_byte *rmw, int channel) +{ + if (dev->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 usb_dt9812 *dev, + struct dt9812_rmw_byte *rmw, + enum dt9812_gain gain) +{ + if (dev->device == DT9812_DEVID_DT9812_10) { + /* In the DT9812/10V, there is an external gain of 0.5 */ + 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; + 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; + default: + err("Illegal gain %d\n", gain); + + } +} + +static int dt9812_analog_in(struct slot_dt9812 *slot, int channel, u16 *value, + enum dt9812_gain gain) +{ + struct dt9812_rmw_byte rmw[3]; + u8 reg[3] = { + F020_SFR_ADC0CN, + F020_SFR_ADC0H, + F020_SFR_ADC0L + }; + u8 val[3]; + int result = -ENODEV; + + down(&slot->mutex); + if (!slot->usb) + goto exit; + + /* 1 select the gain */ + dt9812_configure_gain(slot->usb, &rmw[0], gain); + + /* 2 set the MUX to select the channel */ + dt9812_configure_mux(slot->usb, &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; + + result = dt9812_rmw_multiple_registers(slot->usb, 3, rmw); + if (result) + goto exit; + + /* read the status and ADC */ + result = dt9812_read_multiple_registers(slot->usb, 3, reg, val); + if (result) + 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 (slot->usb->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: + up(&slot->mutex); + return result; +} + +static int dt9812_analog_out_shadow(struct slot_dt9812 *slot, int channel, + u16 *value) +{ + int result = -ENODEV; + + down(&slot->mutex); + if (slot->usb) { + *value = slot->usb->analog_out_shadow[channel]; + result = 0; + } + up(&slot->mutex); + + return result; +} + +static int dt9812_analog_out(struct slot_dt9812 *slot, int channel, u16 value) +{ + int result = -ENODEV; + + down(&slot->mutex); + if (slot->usb) { + struct dt9812_rmw_byte rmw[3]; + + 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 low byte of DAC value first */ + rmw[1].address = F020_SFR_DAC0L; + rmw[1].and_mask = 0xff; + rmw[1].or_value = value & 0xff; + + /* 3 load high byte 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 low byte of DAC value first */ + rmw[1].address = F020_SFR_DAC1L; + rmw[1].and_mask = 0xff; + rmw[1].or_value = value & 0xff; + + /* 3 load high byte 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; + } + result = dt9812_rmw_multiple_registers(slot->usb, 3, rmw); + slot->usb->analog_out_shadow[channel] = value; + } + up(&slot->mutex); + + return result; +} + +/* + * USB framework functions + */ + +static int dt9812_probe(struct usb_interface *interface, + const struct usb_device_id *id) +{ + int retval = -ENOMEM; + struct usb_dt9812 *dev = NULL; + struct usb_host_interface *iface_desc; + struct usb_endpoint_descriptor *endpoint; + int i; + u8 fw; + + /* allocate memory for our device state and initialize it */ + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (dev == NULL) { + dev_err(&interface->dev, "Out of memory\n"); + goto error; + } + kref_init(&dev->kref); + + dev->udev = usb_get_dev(interface_to_usbdev(interface)); + dev->interface = interface; + + /* Check endpoints */ + iface_desc = interface->cur_altsetting; + + if (iface_desc->desc.bNumEndpoints != 5) { + err("Wrong number of endpints."); + retval = -ENODEV; + goto error; + } + + for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { + int direction = -1; + endpoint = &iface_desc->endpoint[i].desc; + switch (i) { + case 0: + direction = USB_DIR_IN; + dev->message_pipe.addr = endpoint->bEndpointAddress; + dev->message_pipe.size = + le16_to_cpu(endpoint->wMaxPacketSize); + + break; + case 1: + direction = USB_DIR_OUT; + dev->command_write.addr = endpoint->bEndpointAddress; + dev->command_write.size = + le16_to_cpu(endpoint->wMaxPacketSize); + break; + case 2: + direction = USB_DIR_IN; + dev->command_read.addr = endpoint->bEndpointAddress; + dev->command_read.size = + le16_to_cpu(endpoint->wMaxPacketSize); + break; + case 3: + direction = USB_DIR_OUT; + dev->write_stream.addr = endpoint->bEndpointAddress; + dev->write_stream.size = + le16_to_cpu(endpoint->wMaxPacketSize); + break; + case 4: + direction = USB_DIR_IN; + dev->read_stream.addr = endpoint->bEndpointAddress; + dev->read_stream.size = + le16_to_cpu(endpoint->wMaxPacketSize); + break; + } + if ((endpoint->bEndpointAddress & USB_DIR_IN) != direction) { + dev_err(&interface->dev, + "Endpoint has wrong direction.\n"); + retval = -ENODEV; + goto error; + } + } + if (dt9812_read_info(dev, 0, &fw, sizeof(fw)) != 0) { + /* + * Seems like a configuration reset is necessary if driver is + * reloaded while device is attached + */ + usb_reset_configuration(dev->udev); + for (i = 0; i < 10; i++) { + retval = dt9812_read_info(dev, 1, &fw, sizeof(fw)); + if (retval == 0) { + dev_info(&interface->dev, + "usb_reset_configuration succeded " + "after %d iterations\n", i); + break; + } + } + } + + if (dt9812_read_info(dev, 1, &dev->vendor, sizeof(dev->vendor)) != 0) { + err("Failed to read vendor."); + retval = -ENODEV; + goto error; + } + if (dt9812_read_info(dev, 3, &dev->product, + sizeof(dev->product)) != 0) { + err("Failed to read product."); + retval = -ENODEV; + goto error; + } + if (dt9812_read_info(dev, 5, &dev->device, sizeof(dev->device)) != 0) { + err("Failed to read device."); + retval = -ENODEV; + goto error; + } + if (dt9812_read_info(dev, 7, &dev->serial, sizeof(dev->serial)) != 0) { + err("Failed to read serial."); + retval = -ENODEV; + goto error; + } + + dev->vendor = le16_to_cpu(dev->vendor); + dev->product = le16_to_cpu(dev->product); + dev->device = le16_to_cpu(dev->device); + dev->serial = le32_to_cpu(dev->serial); + switch (dev->device) { + case DT9812_DEVID_DT9812_10: + dev->analog_out_shadow[0] = 0x0800; + dev->analog_out_shadow[1] = 0x800; + break; + case DT9812_DEVID_DT9812_2PT5: + dev->analog_out_shadow[0] = 0x0000; + dev->analog_out_shadow[1] = 0x0000; + break; + } + dev->digital_out_shadow = 0; + + /* save our data pointer in this interface device */ + usb_set_intfdata(interface, dev); + + /* let the user know what node this device is now attached to */ + dev_info(&interface->dev, "USB DT9812 (%4.4x.%4.4x.%4.4x) #0x%8.8x\n", + dev->vendor, dev->product, dev->device, dev->serial); + + down(&dt9812_mutex); + { + /* Find a slot for the USB device */ + struct slot_dt9812 *first = NULL; + struct slot_dt9812 *best = NULL; + + for (i = 0; i < DT9812_NUM_SLOTS; i++) { + if (!first && !dt9812[i].usb && dt9812[i].serial == 0) + first = &dt9812[i]; + if (!best && dt9812[i].serial == dev->serial) + best = &dt9812[i]; + } + + if (!best) + best = first; + + if (best) { + down(&best->mutex); + best->usb = dev; + dev->slot = best; + up(&best->mutex); + } + } + up(&dt9812_mutex); + + return 0; + +error: + if (dev) + kref_put(&dev->kref, dt9812_delete); + return retval; +} + +static void dt9812_disconnect(struct usb_interface *interface) +{ + struct usb_dt9812 *dev; + int minor = interface->minor; + + down(&dt9812_mutex); + dev = usb_get_intfdata(interface); + if (dev->slot) { + down(&dev->slot->mutex); + dev->slot->usb = NULL; + up(&dev->slot->mutex); + dev->slot = NULL; + } + usb_set_intfdata(interface, NULL); + up(&dt9812_mutex); + + /* queue final destruction */ + kref_put(&dev->kref, dt9812_delete); + + dev_info(&interface->dev, "USB Dt9812 #%d now disconnected\n", minor); +} + +static struct usb_driver dt9812_usb_driver = { + .name = "dt9812", + .probe = dt9812_probe, + .disconnect = dt9812_disconnect, + .id_table = dt9812_table, +}; + +/* + * Comedi functions + */ + +static void dt9812_comedi_open(comedi_device *dev) +{ + down(&devpriv->slot->mutex); + if (devpriv->slot->usb) { + /* We have an attached device, fill in current range info */ + comedi_subdevice *s; + + s = &dev->subdevices[0]; + s->n_chan = 8; + s->maxdata = 1; + + s = &dev->subdevices[1]; + s->n_chan = 8; + s->maxdata = 1; + + s = &dev->subdevices[2]; + s->n_chan = 8; + switch (devpriv->slot->usb->device) { + case 0:{ + s->maxdata = 4095; + s->range_table = &dt9812_10_ain_range; + } + break; + case 1:{ + s->maxdata = 4095; + s->range_table = &dt9812_2pt5_ain_range; + } + break; + } + + s = &dev->subdevices[3]; + s->n_chan = 2; + switch (devpriv->slot->usb->device) { + case 0:{ + s->maxdata = 4095; + s->range_table = &dt9812_10_aout_range; + } + break; + case 1:{ + s->maxdata = 4095; + s->range_table = &dt9812_2pt5_aout_range; + } + break; + } + } + up(&devpriv->slot->mutex); +} + +static int dt9812_di_rinsn(comedi_device *dev, comedi_subdevice *s, + comedi_insn *insn, lsampl_t *data) +{ + int n; + u8 bits = 0; + + dt9812_digital_in(devpriv->slot, &bits); + for (n = 0; n < insn->n; n++) + data[n] = ((1 << insn->chanspec) & bits) != 0; + return n; +} + +static int dt9812_do_winsn(comedi_device *dev, comedi_subdevice *s, + comedi_insn *insn, lsampl_t *data) +{ + int n; + u8 bits = 0; + + dt9812_digital_out_shadow(devpriv->slot, &bits); + for (n = 0; n < insn->n; n++) { + u8 mask = 1 << insn->chanspec; + + bits &= ~mask; + if (data[n]) + bits |= mask; + } + dt9812_digital_out(devpriv->slot, bits); + return n; +} + +static int dt9812_ai_rinsn(comedi_device *dev, comedi_subdevice *s, + comedi_insn *insn, lsampl_t *data) +{ + int n; + + for (n = 0; n < insn->n; n++) { + u16 value = 0; + + dt9812_analog_in(devpriv->slot, insn->chanspec, &value, + DT9812_GAIN_1); + data[n] = value; + } + return n; +} + +static int dt9812_ao_rinsn(comedi_device *dev, comedi_subdevice *s, + comedi_insn *insn, lsampl_t *data) +{ + int n; + u16 value; + + for (n = 0; n < insn->n; n++) { + value = 0; + dt9812_analog_out_shadow(devpriv->slot, insn->chanspec, &value); + data[n] = value; + } + return n; +} + +static int dt9812_ao_winsn(comedi_device *dev, comedi_subdevice *s, + comedi_insn *insn, lsampl_t *data) +{ + int n; + + for (n = 0; n < insn->n; n++) + dt9812_analog_out(devpriv->slot, insn->chanspec, data[n]); + return n; +} + +static int dt9812_attach(comedi_device *dev, comedi_devconfig *it) +{ + int i; + comedi_subdevice *s; + + dev->board_name = "dt9812"; + + if (alloc_private(dev, sizeof(struct comedi_dt9812)) < 0) + return -ENOMEM; + + /* + * Special open routine, since USB unit may be unattached at + * comedi_config time, hence range can not be determined + */ + dev->open = dt9812_comedi_open; + + devpriv->serial = it->options[0]; + + /* Allocate subdevices */ + if (alloc_subdevices(dev, 4) < 0) + return -ENOMEM; + + /* digital input subdevice */ + s = dev->subdevices + 0; + s->type = COMEDI_SUBD_DI; + s->subdev_flags = SDF_READABLE; + s->n_chan = 0; + s->maxdata = 1; + s->range_table = &range_digital; + s->insn_read = &dt9812_di_rinsn; + + /* digital output subdevice */ + s = dev->subdevices + 1; + s->type = COMEDI_SUBD_DO; + s->subdev_flags = SDF_WRITEABLE; + s->n_chan = 0; + s->maxdata = 1; + s->range_table = &range_digital; + s->insn_write = &dt9812_do_winsn; + + /* analog input subdevice */ + s = dev->subdevices + 2; + s->type = COMEDI_SUBD_AI; + s->subdev_flags = SDF_READABLE | SDF_GROUND; + s->n_chan = 0; + s->maxdata = 1; + s->range_table = NULL; + s->insn_read = &dt9812_ai_rinsn; + + /* analog output subdevice */ + s = dev->subdevices + 3; + s->type = COMEDI_SUBD_AO; + s->subdev_flags = SDF_WRITEABLE; + s->n_chan = 0; + s->maxdata = 1; + s->range_table = NULL; + s->insn_write = &dt9812_ao_winsn; + s->insn_read = &dt9812_ao_rinsn; + + printk(KERN_INFO "comedi%d: successfully attached to dt9812.\n", + dev->minor); + + down(&dt9812_mutex); + /* Find a slot for the comedi device */ + { + struct slot_dt9812 *first = NULL; + struct slot_dt9812 *best = NULL; + for (i = 0; i < DT9812_NUM_SLOTS; i++) { + if (!first && !dt9812[i].comedi) { + /* First free slot from comedi side */ + first = &dt9812[i]; + } + if (!best && + dt9812[i].usb && + dt9812[i].usb->serial == devpriv->serial) { + /* We have an attaced device with matching ID */ + best = &dt9812[i]; + } + } + if (!best) + best = first; + if (best) { + down(&best->mutex); + best->comedi = devpriv; + best->serial = devpriv->serial; + devpriv->slot = best; + up(&best->mutex); + } + } + up(&dt9812_mutex); + + return 0; +} + +static int dt9812_detach(comedi_device *dev) +{ + return 0; +} + +static comedi_driver dt9812_comedi_driver = { + .module = THIS_MODULE, + .driver_name = "dt9812", + .attach = dt9812_attach, + .detach = dt9812_detach, +}; + +static int __init usb_dt9812_init(void) +{ + int result, i; + + /* Initialize all driver slots */ + for (i = 0; i < DT9812_NUM_SLOTS; i++) { + init_MUTEX(&dt9812[i].mutex); + dt9812[i].serial = 0; + dt9812[i].usb = NULL; + dt9812[i].comedi = NULL; + } + dt9812[12].serial = 0x0; + + /* register with the USB subsystem */ + result = usb_register(&dt9812_usb_driver); + if (result) { + printk(KERN_ERR KBUILD_MODNAME + ": usb_register failed. Error number %d\n", result); + return result; + } + /* register with comedi */ + result = comedi_driver_register(&dt9812_comedi_driver); + if (result) { + usb_deregister(&dt9812_usb_driver); + err("comedi_driver_register failed. Error number %d", result); + } + + return result; +} + +static void __exit usb_dt9812_exit(void) +{ + /* unregister with comedi */ + comedi_driver_unregister(&dt9812_comedi_driver); + + /* deregister this driver with the USB subsystem */ + usb_deregister(&dt9812_usb_driver); +} + +module_init(usb_dt9812_init); +module_exit(usb_dt9812_exit); + +MODULE_AUTHOR("Anders Blomdell <anders.blomdell@control.lth.se>"); +MODULE_DESCRIPTION("Comedi DT9812 driver"); +MODULE_LICENSE("GPL"); |