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1182 lines
31 KiB
1182 lines
31 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* USB RedRat3 IR Transceiver rc-core driver |
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* |
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* Copyright (c) 2011 by Jarod Wilson <[email protected]> |
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* based heavily on the work of Stephen Cox, with additional |
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* help from RedRat Ltd. |
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* |
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* This driver began life based an an old version of the first-generation |
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* lirc_mceusb driver from the lirc 0.7.2 distribution. It was then |
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* significantly rewritten by Stephen Cox with the aid of RedRat Ltd's |
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* Chris Dodge. |
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* |
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* The driver was then ported to rc-core and significantly rewritten again, |
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* by Jarod, using the in-kernel mceusb driver as a guide, after an initial |
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* port effort was started by Stephen. |
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* |
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* TODO LIST: |
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* - fix lirc not showing repeats properly |
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* -- |
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* |
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* The RedRat3 is a USB transceiver with both send & receive, |
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* with 2 separate sensors available for receive to enable |
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* both good long range reception for general use, and good |
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* short range reception when required for learning a signal. |
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* |
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* http://www.redrat.co.uk/ |
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* |
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* It uses its own little protocol to communicate, the required |
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* parts of which are embedded within this driver. |
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* -- |
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*/ |
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|
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#include <asm/unaligned.h> |
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#include <linux/device.h> |
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#include <linux/leds.h> |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/usb.h> |
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#include <linux/usb/input.h> |
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#include <media/rc-core.h> |
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|
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/* Driver Information */ |
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#define DRIVER_AUTHOR "Jarod Wilson <[email protected]>" |
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#define DRIVER_AUTHOR2 "The Dweller, Stephen Cox" |
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#define DRIVER_DESC "RedRat3 USB IR Transceiver Driver" |
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#define DRIVER_NAME "redrat3" |
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|
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/* bulk data transfer types */ |
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#define RR3_ERROR 0x01 |
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#define RR3_MOD_SIGNAL_IN 0x20 |
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#define RR3_MOD_SIGNAL_OUT 0x21 |
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|
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/* Get the RR firmware version */ |
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#define RR3_FW_VERSION 0xb1 |
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#define RR3_FW_VERSION_LEN 64 |
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/* Send encoded signal bulk-sent earlier*/ |
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#define RR3_TX_SEND_SIGNAL 0xb3 |
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#define RR3_SET_IR_PARAM 0xb7 |
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#define RR3_GET_IR_PARAM 0xb8 |
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/* Blink the red LED on the device */ |
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#define RR3_BLINK_LED 0xb9 |
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/* Read serial number of device */ |
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#define RR3_READ_SER_NO 0xba |
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#define RR3_SER_NO_LEN 4 |
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/* Start capture with the RC receiver */ |
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#define RR3_RC_DET_ENABLE 0xbb |
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/* Stop capture with the RC receiver */ |
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#define RR3_RC_DET_DISABLE 0xbc |
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/* Start capture with the wideband receiver */ |
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#define RR3_MODSIG_CAPTURE 0xb2 |
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/* Return the status of RC detector capture */ |
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#define RR3_RC_DET_STATUS 0xbd |
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/* Reset redrat */ |
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#define RR3_RESET 0xa0 |
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|
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/* Max number of lengths in the signal. */ |
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#define RR3_IR_IO_MAX_LENGTHS 0x01 |
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/* Periods to measure mod. freq. */ |
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#define RR3_IR_IO_PERIODS_MF 0x02 |
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/* Size of memory for main signal data */ |
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#define RR3_IR_IO_SIG_MEM_SIZE 0x03 |
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/* Delta value when measuring lengths */ |
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#define RR3_IR_IO_LENGTH_FUZZ 0x04 |
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/* Timeout for end of signal detection */ |
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#define RR3_IR_IO_SIG_TIMEOUT 0x05 |
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/* Minimum value for pause recognition. */ |
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#define RR3_IR_IO_MIN_PAUSE 0x06 |
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|
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/* Clock freq. of EZ-USB chip */ |
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#define RR3_CLK 24000000 |
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/* Clock periods per timer count */ |
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#define RR3_CLK_PER_COUNT 12 |
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/* (RR3_CLK / RR3_CLK_PER_COUNT) */ |
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#define RR3_CLK_CONV_FACTOR 2000000 |
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/* USB bulk-in wideband IR data endpoint address */ |
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#define RR3_WIDE_IN_EP_ADDR 0x81 |
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/* USB bulk-in narrowband IR data endpoint address */ |
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#define RR3_NARROW_IN_EP_ADDR 0x82 |
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|
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/* Size of the fixed-length portion of the signal */ |
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#define RR3_DRIVER_MAXLENS 255 |
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#define RR3_MAX_SIG_SIZE 512 |
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#define RR3_TIME_UNIT 50 |
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#define RR3_END_OF_SIGNAL 0x7f |
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#define RR3_TX_TRAILER_LEN 2 |
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#define RR3_RX_MIN_TIMEOUT 5 |
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#define RR3_RX_MAX_TIMEOUT 2000 |
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|
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/* The 8051's CPUCS Register address */ |
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#define RR3_CPUCS_REG_ADDR 0x7f92 |
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|
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#define USB_RR3USB_VENDOR_ID 0x112a |
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#define USB_RR3USB_PRODUCT_ID 0x0001 |
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#define USB_RR3IIUSB_PRODUCT_ID 0x0005 |
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|
|
|
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/* |
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* The redrat3 encodes an IR signal as set of different lengths and a set |
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* of indices into those lengths. This sets how much two lengths must |
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* differ before they are considered distinct, the value is specified |
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* in microseconds. |
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* Default 5, value 0 to 127. |
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*/ |
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static int length_fuzz = 5; |
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module_param(length_fuzz, uint, 0644); |
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MODULE_PARM_DESC(length_fuzz, "Length Fuzz (0-127)"); |
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|
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/* |
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* When receiving a continuous ir stream (for example when a user is |
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* holding a button down on a remote), this specifies the minimum size |
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* of a space when the redrat3 sends a irdata packet to the host. Specified |
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* in milliseconds. Default value 18ms. |
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* The value can be between 2 and 30 inclusive. |
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*/ |
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static int minimum_pause = 18; |
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module_param(minimum_pause, uint, 0644); |
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MODULE_PARM_DESC(minimum_pause, "Minimum Pause in ms (2-30)"); |
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|
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/* |
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* The carrier frequency is measured during the first pulse of the IR |
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* signal. The larger the number of periods used To measure, the more |
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* accurate the result is likely to be, however some signals have short |
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* initial pulses, so in some case it may be necessary to reduce this value. |
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* Default 8, value 1 to 255. |
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*/ |
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static int periods_measure_carrier = 8; |
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module_param(periods_measure_carrier, uint, 0644); |
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MODULE_PARM_DESC(periods_measure_carrier, "Number of Periods to Measure Carrier (1-255)"); |
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|
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|
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struct redrat3_header { |
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__be16 length; |
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__be16 transfer_type; |
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} __packed; |
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|
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/* sending and receiving irdata */ |
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struct redrat3_irdata { |
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struct redrat3_header header; |
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__be32 pause; |
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__be16 mod_freq_count; |
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__be16 num_periods; |
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__u8 max_lengths; |
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__u8 no_lengths; |
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__be16 max_sig_size; |
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__be16 sig_size; |
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__u8 no_repeats; |
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__be16 lens[RR3_DRIVER_MAXLENS]; /* not aligned */ |
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__u8 sigdata[RR3_MAX_SIG_SIZE]; |
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} __packed; |
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|
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/* firmware errors */ |
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struct redrat3_error { |
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struct redrat3_header header; |
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__be16 fw_error; |
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} __packed; |
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|
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/* table of devices that work with this driver */ |
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static const struct usb_device_id redrat3_dev_table[] = { |
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/* Original version of the RedRat3 */ |
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{USB_DEVICE(USB_RR3USB_VENDOR_ID, USB_RR3USB_PRODUCT_ID)}, |
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/* Second Version/release of the RedRat3 - RetRat3-II */ |
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{USB_DEVICE(USB_RR3USB_VENDOR_ID, USB_RR3IIUSB_PRODUCT_ID)}, |
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{} /* Terminating entry */ |
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}; |
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|
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/* Structure to hold all of our device specific stuff */ |
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struct redrat3_dev { |
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/* core device bits */ |
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struct rc_dev *rc; |
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struct device *dev; |
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|
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/* led control */ |
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struct led_classdev led; |
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atomic_t flash; |
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struct usb_ctrlrequest flash_control; |
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struct urb *flash_urb; |
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u8 flash_in_buf; |
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|
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/* learning */ |
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bool wideband; |
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struct usb_ctrlrequest learn_control; |
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struct urb *learn_urb; |
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u8 learn_buf; |
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|
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/* save off the usb device pointer */ |
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struct usb_device *udev; |
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|
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/* the receive endpoint */ |
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struct usb_endpoint_descriptor *ep_narrow; |
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/* the buffer to receive data */ |
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void *bulk_in_buf; |
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/* urb used to read ir data */ |
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struct urb *narrow_urb; |
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struct urb *wide_urb; |
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|
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/* the send endpoint */ |
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struct usb_endpoint_descriptor *ep_out; |
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|
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/* usb dma */ |
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dma_addr_t dma_in; |
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|
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/* Is the device currently transmitting?*/ |
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bool transmitting; |
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|
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/* store for current packet */ |
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struct redrat3_irdata irdata; |
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u16 bytes_read; |
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|
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u32 carrier; |
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|
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char name[64]; |
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char phys[64]; |
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}; |
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|
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static void redrat3_dump_fw_error(struct redrat3_dev *rr3, int code) |
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{ |
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if (!rr3->transmitting && (code != 0x40)) |
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dev_info(rr3->dev, "fw error code 0x%02x: ", code); |
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|
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switch (code) { |
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case 0x00: |
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pr_cont("No Error\n"); |
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break; |
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|
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/* Codes 0x20 through 0x2f are IR Firmware Errors */ |
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case 0x20: |
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pr_cont("Initial signal pulse not long enough to measure carrier frequency\n"); |
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break; |
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case 0x21: |
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pr_cont("Not enough length values allocated for signal\n"); |
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break; |
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case 0x22: |
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pr_cont("Not enough memory allocated for signal data\n"); |
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break; |
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case 0x23: |
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pr_cont("Too many signal repeats\n"); |
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break; |
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case 0x28: |
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pr_cont("Insufficient memory available for IR signal data memory allocation\n"); |
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break; |
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case 0x29: |
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pr_cont("Insufficient memory available for IrDa signal data memory allocation\n"); |
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break; |
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|
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/* Codes 0x30 through 0x3f are USB Firmware Errors */ |
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case 0x30: |
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pr_cont("Insufficient memory available for bulk transfer structure\n"); |
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break; |
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|
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/* |
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* Other error codes... These are primarily errors that can occur in |
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* the control messages sent to the redrat |
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*/ |
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case 0x40: |
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if (!rr3->transmitting) |
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pr_cont("Signal capture has been terminated\n"); |
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break; |
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case 0x41: |
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pr_cont("Attempt to set/get and unknown signal I/O algorithm parameter\n"); |
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break; |
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case 0x42: |
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pr_cont("Signal capture already started\n"); |
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break; |
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|
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default: |
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pr_cont("Unknown Error\n"); |
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break; |
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} |
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} |
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static u32 redrat3_val_to_mod_freq(struct redrat3_irdata *irdata) |
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{ |
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u32 mod_freq = 0; |
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u16 mod_freq_count = be16_to_cpu(irdata->mod_freq_count); |
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|
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if (mod_freq_count != 0) |
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mod_freq = (RR3_CLK * be16_to_cpu(irdata->num_periods)) / |
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(mod_freq_count * RR3_CLK_PER_COUNT); |
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return mod_freq; |
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} |
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|
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/* this function scales down the figures for the same result... */ |
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static u32 redrat3_len_to_us(u32 length) |
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{ |
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u32 biglen = length * 1000; |
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u32 divisor = (RR3_CLK_CONV_FACTOR) / 1000; |
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u32 result = (u32) (biglen / divisor); |
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|
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/* don't allow zero lengths to go back, breaks lirc */ |
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return result ? result : 1; |
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} |
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|
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/* |
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* convert us back into redrat3 lengths |
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* |
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* length * 1000 length * 1000000 |
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* ------------- = ---------------- = micro |
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* rr3clk / 1000 rr3clk |
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|
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* 6 * 2 4 * 3 micro * rr3clk micro * rr3clk / 1000 |
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* ----- = 4 ----- = 6 -------------- = len --------------------- |
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* 3 2 1000000 1000 |
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*/ |
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static u32 redrat3_us_to_len(u32 microsec) |
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{ |
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u32 result; |
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u32 divisor; |
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microsec = (microsec > IR_MAX_DURATION) ? IR_MAX_DURATION : microsec; |
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divisor = (RR3_CLK_CONV_FACTOR / 1000); |
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result = (u32)(microsec * divisor) / 1000; |
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/* don't allow zero lengths to go back, breaks lirc */ |
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return result ? result : 1; |
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} |
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static void redrat3_process_ir_data(struct redrat3_dev *rr3) |
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{ |
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struct ir_raw_event rawir = {}; |
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struct device *dev; |
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unsigned int i, sig_size, offset, val; |
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u32 mod_freq; |
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dev = rr3->dev; |
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mod_freq = redrat3_val_to_mod_freq(&rr3->irdata); |
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dev_dbg(dev, "Got mod_freq of %u\n", mod_freq); |
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if (mod_freq && rr3->wideband) { |
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struct ir_raw_event ev = { |
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.carrier_report = 1, |
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.carrier = mod_freq |
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}; |
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|
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ir_raw_event_store(rr3->rc, &ev); |
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} |
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|
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/* process each rr3 encoded byte into an int */ |
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sig_size = be16_to_cpu(rr3->irdata.sig_size); |
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for (i = 0; i < sig_size; i++) { |
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offset = rr3->irdata.sigdata[i]; |
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val = get_unaligned_be16(&rr3->irdata.lens[offset]); |
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|
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/* we should always get pulse/space/pulse/space samples */ |
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if (i % 2) |
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rawir.pulse = false; |
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else |
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rawir.pulse = true; |
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|
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rawir.duration = redrat3_len_to_us(val); |
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/* cap the value to IR_MAX_DURATION */ |
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rawir.duration = (rawir.duration > IR_MAX_DURATION) ? |
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IR_MAX_DURATION : rawir.duration; |
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|
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dev_dbg(dev, "storing %s with duration %d (i: %d)\n", |
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rawir.pulse ? "pulse" : "space", rawir.duration, i); |
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ir_raw_event_store_with_filter(rr3->rc, &rawir); |
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} |
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|
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/* add a trailing space */ |
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rawir.pulse = false; |
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rawir.timeout = true; |
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rawir.duration = rr3->rc->timeout; |
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dev_dbg(dev, "storing trailing timeout with duration %d\n", |
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rawir.duration); |
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ir_raw_event_store_with_filter(rr3->rc, &rawir); |
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|
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dev_dbg(dev, "calling ir_raw_event_handle\n"); |
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ir_raw_event_handle(rr3->rc); |
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} |
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|
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/* Util fn to send rr3 cmds */ |
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static int redrat3_send_cmd(int cmd, struct redrat3_dev *rr3) |
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{ |
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struct usb_device *udev; |
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u8 *data; |
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int res; |
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|
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data = kzalloc(sizeof(u8), GFP_KERNEL); |
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if (!data) |
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return -ENOMEM; |
|
|
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udev = rr3->udev; |
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res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), cmd, |
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USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, |
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0x0000, 0x0000, data, sizeof(u8), HZ * 10); |
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|
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if (res < 0) { |
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dev_err(rr3->dev, "%s: Error sending rr3 cmd res %d, data %d", |
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__func__, res, *data); |
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res = -EIO; |
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} else |
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res = data[0]; |
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|
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kfree(data); |
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|
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return res; |
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} |
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|
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/* Enables the long range detector and starts async receive */ |
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static int redrat3_enable_detector(struct redrat3_dev *rr3) |
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{ |
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struct device *dev = rr3->dev; |
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u8 ret; |
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|
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ret = redrat3_send_cmd(RR3_RC_DET_ENABLE, rr3); |
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if (ret != 0) |
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dev_dbg(dev, "%s: unexpected ret of %d\n", |
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__func__, ret); |
|
|
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ret = redrat3_send_cmd(RR3_RC_DET_STATUS, rr3); |
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if (ret != 1) { |
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dev_err(dev, "%s: detector status: %d, should be 1\n", |
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__func__, ret); |
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return -EIO; |
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} |
|
|
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ret = usb_submit_urb(rr3->narrow_urb, GFP_KERNEL); |
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if (ret) { |
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dev_err(rr3->dev, "narrow band urb failed: %d", ret); |
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return ret; |
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} |
|
|
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ret = usb_submit_urb(rr3->wide_urb, GFP_KERNEL); |
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if (ret) |
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dev_err(rr3->dev, "wide band urb failed: %d", ret); |
|
|
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return ret; |
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} |
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|
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static inline void redrat3_delete(struct redrat3_dev *rr3, |
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struct usb_device *udev) |
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{ |
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usb_kill_urb(rr3->narrow_urb); |
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usb_kill_urb(rr3->wide_urb); |
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usb_kill_urb(rr3->flash_urb); |
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usb_kill_urb(rr3->learn_urb); |
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usb_free_urb(rr3->narrow_urb); |
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usb_free_urb(rr3->wide_urb); |
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usb_free_urb(rr3->flash_urb); |
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usb_free_urb(rr3->learn_urb); |
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usb_free_coherent(udev, le16_to_cpu(rr3->ep_narrow->wMaxPacketSize), |
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rr3->bulk_in_buf, rr3->dma_in); |
|
|
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kfree(rr3); |
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} |
|
|
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static u32 redrat3_get_timeout(struct redrat3_dev *rr3) |
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{ |
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__be32 *tmp; |
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u32 timeout = MS_TO_US(150); /* a sane default, if things go haywire */ |
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int len, ret, pipe; |
|
|
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len = sizeof(*tmp); |
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tmp = kzalloc(len, GFP_KERNEL); |
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if (!tmp) |
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return timeout; |
|
|
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pipe = usb_rcvctrlpipe(rr3->udev, 0); |
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ret = usb_control_msg(rr3->udev, pipe, RR3_GET_IR_PARAM, |
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USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, |
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RR3_IR_IO_SIG_TIMEOUT, 0, tmp, len, HZ * 5); |
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if (ret != len) |
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dev_warn(rr3->dev, "Failed to read timeout from hardware\n"); |
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else { |
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timeout = redrat3_len_to_us(be32_to_cpup(tmp)); |
|
|
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dev_dbg(rr3->dev, "Got timeout of %d ms\n", timeout / 1000); |
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} |
|
|
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kfree(tmp); |
|
|
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return timeout; |
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} |
|
|
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static int redrat3_set_timeout(struct rc_dev *rc_dev, unsigned int timeoutus) |
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{ |
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struct redrat3_dev *rr3 = rc_dev->priv; |
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struct usb_device *udev = rr3->udev; |
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struct device *dev = rr3->dev; |
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__be32 *timeout; |
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int ret; |
|
|
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timeout = kmalloc(sizeof(*timeout), GFP_KERNEL); |
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if (!timeout) |
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return -ENOMEM; |
|
|
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*timeout = cpu_to_be32(redrat3_us_to_len(timeoutus)); |
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ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), RR3_SET_IR_PARAM, |
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USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, |
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RR3_IR_IO_SIG_TIMEOUT, 0, timeout, sizeof(*timeout), |
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HZ * 25); |
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dev_dbg(dev, "set ir parm timeout %d ret 0x%02x\n", |
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be32_to_cpu(*timeout), ret); |
|
|
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if (ret == sizeof(*timeout)) |
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ret = 0; |
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else if (ret >= 0) |
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ret = -EIO; |
|
|
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kfree(timeout); |
|
|
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return ret; |
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} |
|
|
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static void redrat3_reset(struct redrat3_dev *rr3) |
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{ |
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struct usb_device *udev = rr3->udev; |
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struct device *dev = rr3->dev; |
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int rc, rxpipe, txpipe; |
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u8 *val; |
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size_t const len = sizeof(*val); |
|
|
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rxpipe = usb_rcvctrlpipe(udev, 0); |
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txpipe = usb_sndctrlpipe(udev, 0); |
|
|
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val = kmalloc(len, GFP_KERNEL); |
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if (!val) |
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return; |
|
|
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*val = 0x01; |
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rc = usb_control_msg(udev, rxpipe, RR3_RESET, |
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USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, |
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RR3_CPUCS_REG_ADDR, 0, val, len, HZ * 25); |
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dev_dbg(dev, "reset returned 0x%02x\n", rc); |
|
|
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*val = length_fuzz; |
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rc = usb_control_msg(udev, txpipe, RR3_SET_IR_PARAM, |
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USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, |
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RR3_IR_IO_LENGTH_FUZZ, 0, val, len, HZ * 25); |
|
dev_dbg(dev, "set ir parm len fuzz %d rc 0x%02x\n", *val, rc); |
|
|
|
*val = (65536 - (minimum_pause * 2000)) / 256; |
|
rc = usb_control_msg(udev, txpipe, RR3_SET_IR_PARAM, |
|
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, |
|
RR3_IR_IO_MIN_PAUSE, 0, val, len, HZ * 25); |
|
dev_dbg(dev, "set ir parm min pause %d rc 0x%02x\n", *val, rc); |
|
|
|
*val = periods_measure_carrier; |
|
rc = usb_control_msg(udev, txpipe, RR3_SET_IR_PARAM, |
|
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, |
|
RR3_IR_IO_PERIODS_MF, 0, val, len, HZ * 25); |
|
dev_dbg(dev, "set ir parm periods measure carrier %d rc 0x%02x", *val, |
|
rc); |
|
|
|
*val = RR3_DRIVER_MAXLENS; |
|
rc = usb_control_msg(udev, txpipe, RR3_SET_IR_PARAM, |
|
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, |
|
RR3_IR_IO_MAX_LENGTHS, 0, val, len, HZ * 25); |
|
dev_dbg(dev, "set ir parm max lens %d rc 0x%02x\n", *val, rc); |
|
|
|
kfree(val); |
|
} |
|
|
|
static void redrat3_get_firmware_rev(struct redrat3_dev *rr3) |
|
{ |
|
int rc; |
|
char *buffer; |
|
|
|
buffer = kcalloc(RR3_FW_VERSION_LEN + 1, sizeof(*buffer), GFP_KERNEL); |
|
if (!buffer) |
|
return; |
|
|
|
rc = usb_control_msg(rr3->udev, usb_rcvctrlpipe(rr3->udev, 0), |
|
RR3_FW_VERSION, |
|
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, |
|
0, 0, buffer, RR3_FW_VERSION_LEN, HZ * 5); |
|
|
|
if (rc >= 0) |
|
dev_info(rr3->dev, "Firmware rev: %s", buffer); |
|
else |
|
dev_err(rr3->dev, "Problem fetching firmware ID\n"); |
|
|
|
kfree(buffer); |
|
} |
|
|
|
static void redrat3_read_packet_start(struct redrat3_dev *rr3, unsigned len) |
|
{ |
|
struct redrat3_header *header = rr3->bulk_in_buf; |
|
unsigned pktlen, pkttype; |
|
|
|
/* grab the Length and type of transfer */ |
|
pktlen = be16_to_cpu(header->length); |
|
pkttype = be16_to_cpu(header->transfer_type); |
|
|
|
if (pktlen > sizeof(rr3->irdata)) { |
|
dev_warn(rr3->dev, "packet length %u too large\n", pktlen); |
|
return; |
|
} |
|
|
|
switch (pkttype) { |
|
case RR3_ERROR: |
|
if (len >= sizeof(struct redrat3_error)) { |
|
struct redrat3_error *error = rr3->bulk_in_buf; |
|
unsigned fw_error = be16_to_cpu(error->fw_error); |
|
redrat3_dump_fw_error(rr3, fw_error); |
|
} |
|
break; |
|
|
|
case RR3_MOD_SIGNAL_IN: |
|
memcpy(&rr3->irdata, rr3->bulk_in_buf, len); |
|
rr3->bytes_read = len; |
|
dev_dbg(rr3->dev, "bytes_read %d, pktlen %d\n", |
|
rr3->bytes_read, pktlen); |
|
break; |
|
|
|
default: |
|
dev_dbg(rr3->dev, "ignoring packet with type 0x%02x, len of %d, 0x%02x\n", |
|
pkttype, len, pktlen); |
|
break; |
|
} |
|
} |
|
|
|
static void redrat3_read_packet_continue(struct redrat3_dev *rr3, unsigned len) |
|
{ |
|
void *irdata = &rr3->irdata; |
|
|
|
if (len + rr3->bytes_read > sizeof(rr3->irdata)) { |
|
dev_warn(rr3->dev, "too much data for packet\n"); |
|
rr3->bytes_read = 0; |
|
return; |
|
} |
|
|
|
memcpy(irdata + rr3->bytes_read, rr3->bulk_in_buf, len); |
|
|
|
rr3->bytes_read += len; |
|
dev_dbg(rr3->dev, "bytes_read %d, pktlen %d\n", rr3->bytes_read, |
|
be16_to_cpu(rr3->irdata.header.length)); |
|
} |
|
|
|
/* gather IR data from incoming urb, process it when we have enough */ |
|
static int redrat3_get_ir_data(struct redrat3_dev *rr3, unsigned len) |
|
{ |
|
struct device *dev = rr3->dev; |
|
unsigned pkttype; |
|
int ret = 0; |
|
|
|
if (rr3->bytes_read == 0 && len >= sizeof(struct redrat3_header)) { |
|
redrat3_read_packet_start(rr3, len); |
|
} else if (rr3->bytes_read != 0) { |
|
redrat3_read_packet_continue(rr3, len); |
|
} else if (rr3->bytes_read == 0) { |
|
dev_err(dev, "error: no packet data read\n"); |
|
ret = -ENODATA; |
|
goto out; |
|
} |
|
|
|
if (rr3->bytes_read < be16_to_cpu(rr3->irdata.header.length) + |
|
sizeof(struct redrat3_header)) |
|
/* we're still accumulating data */ |
|
return 0; |
|
|
|
/* if we get here, we've got IR data to decode */ |
|
pkttype = be16_to_cpu(rr3->irdata.header.transfer_type); |
|
if (pkttype == RR3_MOD_SIGNAL_IN) |
|
redrat3_process_ir_data(rr3); |
|
else |
|
dev_dbg(dev, "discarding non-signal data packet (type 0x%02x)\n", |
|
pkttype); |
|
|
|
out: |
|
rr3->bytes_read = 0; |
|
return ret; |
|
} |
|
|
|
/* callback function from USB when async USB request has completed */ |
|
static void redrat3_handle_async(struct urb *urb) |
|
{ |
|
struct redrat3_dev *rr3 = urb->context; |
|
int ret; |
|
|
|
switch (urb->status) { |
|
case 0: |
|
ret = redrat3_get_ir_data(rr3, urb->actual_length); |
|
if (!ret && rr3->wideband && !rr3->learn_urb->hcpriv) { |
|
ret = usb_submit_urb(rr3->learn_urb, GFP_ATOMIC); |
|
if (ret) |
|
dev_err(rr3->dev, "Failed to submit learning urb: %d", |
|
ret); |
|
} |
|
|
|
if (!ret) { |
|
/* no error, prepare to read more */ |
|
ret = usb_submit_urb(urb, GFP_ATOMIC); |
|
if (ret) |
|
dev_err(rr3->dev, "Failed to resubmit urb: %d", |
|
ret); |
|
} |
|
break; |
|
|
|
case -ECONNRESET: |
|
case -ENOENT: |
|
case -ESHUTDOWN: |
|
usb_unlink_urb(urb); |
|
return; |
|
|
|
case -EPIPE: |
|
default: |
|
dev_warn(rr3->dev, "Error: urb status = %d\n", urb->status); |
|
rr3->bytes_read = 0; |
|
break; |
|
} |
|
} |
|
|
|
static u16 mod_freq_to_val(unsigned int mod_freq) |
|
{ |
|
int mult = 6000000; |
|
|
|
/* Clk used in mod. freq. generation is CLK24/4. */ |
|
return 65536 - (mult / mod_freq); |
|
} |
|
|
|
static int redrat3_set_tx_carrier(struct rc_dev *rcdev, u32 carrier) |
|
{ |
|
struct redrat3_dev *rr3 = rcdev->priv; |
|
struct device *dev = rr3->dev; |
|
|
|
dev_dbg(dev, "Setting modulation frequency to %u", carrier); |
|
if (carrier == 0) |
|
return -EINVAL; |
|
|
|
rr3->carrier = carrier; |
|
|
|
return 0; |
|
} |
|
|
|
static int redrat3_transmit_ir(struct rc_dev *rcdev, unsigned *txbuf, |
|
unsigned count) |
|
{ |
|
struct redrat3_dev *rr3 = rcdev->priv; |
|
struct device *dev = rr3->dev; |
|
struct redrat3_irdata *irdata = NULL; |
|
int ret, ret_len; |
|
int lencheck, cur_sample_len, pipe; |
|
int *sample_lens = NULL; |
|
u8 curlencheck = 0; |
|
unsigned i, sendbuf_len; |
|
|
|
if (rr3->transmitting) { |
|
dev_warn(dev, "%s: transmitter already in use\n", __func__); |
|
return -EAGAIN; |
|
} |
|
|
|
if (count > RR3_MAX_SIG_SIZE - RR3_TX_TRAILER_LEN) |
|
return -EINVAL; |
|
|
|
/* rr3 will disable rc detector on transmit */ |
|
rr3->transmitting = true; |
|
|
|
sample_lens = kcalloc(RR3_DRIVER_MAXLENS, |
|
sizeof(*sample_lens), |
|
GFP_KERNEL); |
|
if (!sample_lens) |
|
return -ENOMEM; |
|
|
|
irdata = kzalloc(sizeof(*irdata), GFP_KERNEL); |
|
if (!irdata) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
for (i = 0; i < count; i++) { |
|
cur_sample_len = redrat3_us_to_len(txbuf[i]); |
|
if (cur_sample_len > 0xffff) { |
|
dev_warn(dev, "transmit period of %uus truncated to %uus\n", |
|
txbuf[i], redrat3_len_to_us(0xffff)); |
|
cur_sample_len = 0xffff; |
|
} |
|
for (lencheck = 0; lencheck < curlencheck; lencheck++) { |
|
if (sample_lens[lencheck] == cur_sample_len) |
|
break; |
|
} |
|
if (lencheck == curlencheck) { |
|
dev_dbg(dev, "txbuf[%d]=%u, pos %d, enc %u\n", |
|
i, txbuf[i], curlencheck, cur_sample_len); |
|
if (curlencheck < RR3_DRIVER_MAXLENS) { |
|
/* now convert the value to a proper |
|
* rr3 value.. */ |
|
sample_lens[curlencheck] = cur_sample_len; |
|
put_unaligned_be16(cur_sample_len, |
|
&irdata->lens[curlencheck]); |
|
curlencheck++; |
|
} else { |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
} |
|
irdata->sigdata[i] = lencheck; |
|
} |
|
|
|
irdata->sigdata[count] = RR3_END_OF_SIGNAL; |
|
irdata->sigdata[count + 1] = RR3_END_OF_SIGNAL; |
|
|
|
sendbuf_len = offsetof(struct redrat3_irdata, |
|
sigdata[count + RR3_TX_TRAILER_LEN]); |
|
/* fill in our packet header */ |
|
irdata->header.length = cpu_to_be16(sendbuf_len - |
|
sizeof(struct redrat3_header)); |
|
irdata->header.transfer_type = cpu_to_be16(RR3_MOD_SIGNAL_OUT); |
|
irdata->pause = cpu_to_be32(redrat3_len_to_us(100)); |
|
irdata->mod_freq_count = cpu_to_be16(mod_freq_to_val(rr3->carrier)); |
|
irdata->no_lengths = curlencheck; |
|
irdata->sig_size = cpu_to_be16(count + RR3_TX_TRAILER_LEN); |
|
|
|
pipe = usb_sndbulkpipe(rr3->udev, rr3->ep_out->bEndpointAddress); |
|
ret = usb_bulk_msg(rr3->udev, pipe, irdata, |
|
sendbuf_len, &ret_len, 10 * HZ); |
|
dev_dbg(dev, "sent %d bytes, (ret %d)\n", ret_len, ret); |
|
|
|
/* now tell the hardware to transmit what we sent it */ |
|
pipe = usb_rcvctrlpipe(rr3->udev, 0); |
|
ret = usb_control_msg(rr3->udev, pipe, RR3_TX_SEND_SIGNAL, |
|
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, |
|
0, 0, irdata, 2, HZ * 10); |
|
|
|
if (ret < 0) |
|
dev_err(dev, "Error: control msg send failed, rc %d\n", ret); |
|
else |
|
ret = count; |
|
|
|
out: |
|
kfree(irdata); |
|
kfree(sample_lens); |
|
|
|
rr3->transmitting = false; |
|
/* rr3 re-enables rc detector because it was enabled before */ |
|
|
|
return ret; |
|
} |
|
|
|
static void redrat3_brightness_set(struct led_classdev *led_dev, enum |
|
led_brightness brightness) |
|
{ |
|
struct redrat3_dev *rr3 = container_of(led_dev, struct redrat3_dev, |
|
led); |
|
|
|
if (brightness != LED_OFF && atomic_cmpxchg(&rr3->flash, 0, 1) == 0) { |
|
int ret = usb_submit_urb(rr3->flash_urb, GFP_ATOMIC); |
|
if (ret != 0) { |
|
dev_dbg(rr3->dev, "%s: unexpected ret of %d\n", |
|
__func__, ret); |
|
atomic_set(&rr3->flash, 0); |
|
} |
|
} |
|
} |
|
|
|
static int redrat3_wideband_receiver(struct rc_dev *rcdev, int enable) |
|
{ |
|
struct redrat3_dev *rr3 = rcdev->priv; |
|
int ret = 0; |
|
|
|
rr3->wideband = enable != 0; |
|
|
|
if (enable) { |
|
ret = usb_submit_urb(rr3->learn_urb, GFP_KERNEL); |
|
if (ret) |
|
dev_err(rr3->dev, "Failed to submit learning urb: %d", |
|
ret); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static void redrat3_learn_complete(struct urb *urb) |
|
{ |
|
struct redrat3_dev *rr3 = urb->context; |
|
|
|
switch (urb->status) { |
|
case 0: |
|
break; |
|
case -ECONNRESET: |
|
case -ENOENT: |
|
case -ESHUTDOWN: |
|
usb_unlink_urb(urb); |
|
return; |
|
case -EPIPE: |
|
default: |
|
dev_err(rr3->dev, "Error: learn urb status = %d", urb->status); |
|
break; |
|
} |
|
} |
|
|
|
static void redrat3_led_complete(struct urb *urb) |
|
{ |
|
struct redrat3_dev *rr3 = urb->context; |
|
|
|
switch (urb->status) { |
|
case 0: |
|
break; |
|
case -ECONNRESET: |
|
case -ENOENT: |
|
case -ESHUTDOWN: |
|
usb_unlink_urb(urb); |
|
return; |
|
case -EPIPE: |
|
default: |
|
dev_dbg(rr3->dev, "Error: urb status = %d\n", urb->status); |
|
break; |
|
} |
|
|
|
rr3->led.brightness = LED_OFF; |
|
atomic_dec(&rr3->flash); |
|
} |
|
|
|
static struct rc_dev *redrat3_init_rc_dev(struct redrat3_dev *rr3) |
|
{ |
|
struct device *dev = rr3->dev; |
|
struct rc_dev *rc; |
|
int ret; |
|
u16 prod = le16_to_cpu(rr3->udev->descriptor.idProduct); |
|
|
|
rc = rc_allocate_device(RC_DRIVER_IR_RAW); |
|
if (!rc) |
|
return NULL; |
|
|
|
snprintf(rr3->name, sizeof(rr3->name), |
|
"RedRat3%s Infrared Remote Transceiver", |
|
prod == USB_RR3IIUSB_PRODUCT_ID ? "-II" : ""); |
|
|
|
usb_make_path(rr3->udev, rr3->phys, sizeof(rr3->phys)); |
|
|
|
rc->device_name = rr3->name; |
|
rc->input_phys = rr3->phys; |
|
usb_to_input_id(rr3->udev, &rc->input_id); |
|
rc->dev.parent = dev; |
|
rc->priv = rr3; |
|
rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER; |
|
rc->min_timeout = MS_TO_US(RR3_RX_MIN_TIMEOUT); |
|
rc->max_timeout = MS_TO_US(RR3_RX_MAX_TIMEOUT); |
|
rc->timeout = redrat3_get_timeout(rr3); |
|
rc->s_timeout = redrat3_set_timeout; |
|
rc->tx_ir = redrat3_transmit_ir; |
|
rc->s_tx_carrier = redrat3_set_tx_carrier; |
|
rc->s_carrier_report = redrat3_wideband_receiver; |
|
rc->driver_name = DRIVER_NAME; |
|
rc->rx_resolution = 2; |
|
rc->map_name = RC_MAP_HAUPPAUGE; |
|
|
|
ret = rc_register_device(rc); |
|
if (ret < 0) { |
|
dev_err(dev, "remote dev registration failed\n"); |
|
goto out; |
|
} |
|
|
|
return rc; |
|
|
|
out: |
|
rc_free_device(rc); |
|
return NULL; |
|
} |
|
|
|
static int redrat3_dev_probe(struct usb_interface *intf, |
|
const struct usb_device_id *id) |
|
{ |
|
struct usb_device *udev = interface_to_usbdev(intf); |
|
struct device *dev = &intf->dev; |
|
struct usb_host_interface *uhi; |
|
struct redrat3_dev *rr3; |
|
struct usb_endpoint_descriptor *ep; |
|
struct usb_endpoint_descriptor *ep_narrow = NULL; |
|
struct usb_endpoint_descriptor *ep_wide = NULL; |
|
struct usb_endpoint_descriptor *ep_out = NULL; |
|
u8 addr, attrs; |
|
int pipe, i; |
|
int retval = -ENOMEM; |
|
|
|
uhi = intf->cur_altsetting; |
|
|
|
/* find our bulk-in and bulk-out endpoints */ |
|
for (i = 0; i < uhi->desc.bNumEndpoints; ++i) { |
|
ep = &uhi->endpoint[i].desc; |
|
addr = ep->bEndpointAddress; |
|
attrs = ep->bmAttributes; |
|
|
|
if (((addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) && |
|
((attrs & USB_ENDPOINT_XFERTYPE_MASK) == |
|
USB_ENDPOINT_XFER_BULK)) { |
|
dev_dbg(dev, "found bulk-in endpoint at 0x%02x\n", |
|
ep->bEndpointAddress); |
|
/* data comes in on 0x82, 0x81 is for learning */ |
|
if (ep->bEndpointAddress == RR3_NARROW_IN_EP_ADDR) |
|
ep_narrow = ep; |
|
if (ep->bEndpointAddress == RR3_WIDE_IN_EP_ADDR) |
|
ep_wide = ep; |
|
} |
|
|
|
if ((ep_out == NULL) && |
|
((addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) && |
|
((attrs & USB_ENDPOINT_XFERTYPE_MASK) == |
|
USB_ENDPOINT_XFER_BULK)) { |
|
dev_dbg(dev, "found bulk-out endpoint at 0x%02x\n", |
|
ep->bEndpointAddress); |
|
ep_out = ep; |
|
} |
|
} |
|
|
|
if (!ep_narrow || !ep_out || !ep_wide) { |
|
dev_err(dev, "Couldn't find all endpoints\n"); |
|
retval = -ENODEV; |
|
goto no_endpoints; |
|
} |
|
|
|
/* allocate memory for our device state and initialize it */ |
|
rr3 = kzalloc(sizeof(*rr3), GFP_KERNEL); |
|
if (!rr3) |
|
goto no_endpoints; |
|
|
|
rr3->dev = &intf->dev; |
|
rr3->ep_narrow = ep_narrow; |
|
rr3->ep_out = ep_out; |
|
rr3->udev = udev; |
|
|
|
/* set up bulk-in endpoint */ |
|
rr3->narrow_urb = usb_alloc_urb(0, GFP_KERNEL); |
|
if (!rr3->narrow_urb) |
|
goto redrat_free; |
|
|
|
rr3->wide_urb = usb_alloc_urb(0, GFP_KERNEL); |
|
if (!rr3->wide_urb) |
|
goto redrat_free; |
|
|
|
rr3->bulk_in_buf = usb_alloc_coherent(udev, |
|
le16_to_cpu(ep_narrow->wMaxPacketSize), |
|
GFP_KERNEL, &rr3->dma_in); |
|
if (!rr3->bulk_in_buf) |
|
goto redrat_free; |
|
|
|
pipe = usb_rcvbulkpipe(udev, ep_narrow->bEndpointAddress); |
|
usb_fill_bulk_urb(rr3->narrow_urb, udev, pipe, rr3->bulk_in_buf, |
|
le16_to_cpu(ep_narrow->wMaxPacketSize), |
|
redrat3_handle_async, rr3); |
|
rr3->narrow_urb->transfer_dma = rr3->dma_in; |
|
rr3->narrow_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
|
|
|
pipe = usb_rcvbulkpipe(udev, ep_wide->bEndpointAddress); |
|
usb_fill_bulk_urb(rr3->wide_urb, udev, pipe, rr3->bulk_in_buf, |
|
le16_to_cpu(ep_narrow->wMaxPacketSize), |
|
redrat3_handle_async, rr3); |
|
rr3->wide_urb->transfer_dma = rr3->dma_in; |
|
rr3->wide_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
|
|
|
redrat3_reset(rr3); |
|
redrat3_get_firmware_rev(rr3); |
|
|
|
/* default.. will get overridden by any sends with a freq defined */ |
|
rr3->carrier = 38000; |
|
|
|
atomic_set(&rr3->flash, 0); |
|
rr3->flash_urb = usb_alloc_urb(0, GFP_KERNEL); |
|
if (!rr3->flash_urb) |
|
goto redrat_free; |
|
|
|
/* learn urb */ |
|
rr3->learn_urb = usb_alloc_urb(0, GFP_KERNEL); |
|
if (!rr3->learn_urb) |
|
goto redrat_free; |
|
|
|
/* setup packet is 'c0 b2 0000 0000 0001' */ |
|
rr3->learn_control.bRequestType = 0xc0; |
|
rr3->learn_control.bRequest = RR3_MODSIG_CAPTURE; |
|
rr3->learn_control.wLength = cpu_to_le16(1); |
|
|
|
usb_fill_control_urb(rr3->learn_urb, udev, usb_rcvctrlpipe(udev, 0), |
|
(unsigned char *)&rr3->learn_control, |
|
&rr3->learn_buf, sizeof(rr3->learn_buf), |
|
redrat3_learn_complete, rr3); |
|
|
|
/* setup packet is 'c0 b9 0000 0000 0001' */ |
|
rr3->flash_control.bRequestType = 0xc0; |
|
rr3->flash_control.bRequest = RR3_BLINK_LED; |
|
rr3->flash_control.wLength = cpu_to_le16(1); |
|
|
|
usb_fill_control_urb(rr3->flash_urb, udev, usb_rcvctrlpipe(udev, 0), |
|
(unsigned char *)&rr3->flash_control, |
|
&rr3->flash_in_buf, sizeof(rr3->flash_in_buf), |
|
redrat3_led_complete, rr3); |
|
|
|
/* led control */ |
|
rr3->led.name = "redrat3:red:feedback"; |
|
rr3->led.default_trigger = "rc-feedback"; |
|
rr3->led.brightness_set = redrat3_brightness_set; |
|
retval = led_classdev_register(&intf->dev, &rr3->led); |
|
if (retval) |
|
goto redrat_free; |
|
|
|
rr3->rc = redrat3_init_rc_dev(rr3); |
|
if (!rr3->rc) { |
|
retval = -ENOMEM; |
|
goto led_free; |
|
} |
|
|
|
/* might be all we need to do? */ |
|
retval = redrat3_enable_detector(rr3); |
|
if (retval < 0) |
|
goto led_free; |
|
|
|
/* we can register the device now, as it is ready */ |
|
usb_set_intfdata(intf, rr3); |
|
|
|
return 0; |
|
|
|
led_free: |
|
led_classdev_unregister(&rr3->led); |
|
redrat_free: |
|
redrat3_delete(rr3, rr3->udev); |
|
|
|
no_endpoints: |
|
return retval; |
|
} |
|
|
|
static void redrat3_dev_disconnect(struct usb_interface *intf) |
|
{ |
|
struct usb_device *udev = interface_to_usbdev(intf); |
|
struct redrat3_dev *rr3 = usb_get_intfdata(intf); |
|
|
|
usb_set_intfdata(intf, NULL); |
|
rc_unregister_device(rr3->rc); |
|
led_classdev_unregister(&rr3->led); |
|
redrat3_delete(rr3, udev); |
|
} |
|
|
|
static int redrat3_dev_suspend(struct usb_interface *intf, pm_message_t message) |
|
{ |
|
struct redrat3_dev *rr3 = usb_get_intfdata(intf); |
|
|
|
led_classdev_suspend(&rr3->led); |
|
usb_kill_urb(rr3->narrow_urb); |
|
usb_kill_urb(rr3->wide_urb); |
|
usb_kill_urb(rr3->flash_urb); |
|
return 0; |
|
} |
|
|
|
static int redrat3_dev_resume(struct usb_interface *intf) |
|
{ |
|
struct redrat3_dev *rr3 = usb_get_intfdata(intf); |
|
|
|
if (usb_submit_urb(rr3->narrow_urb, GFP_ATOMIC)) |
|
return -EIO; |
|
if (usb_submit_urb(rr3->wide_urb, GFP_ATOMIC)) |
|
return -EIO; |
|
led_classdev_resume(&rr3->led); |
|
return 0; |
|
} |
|
|
|
static struct usb_driver redrat3_dev_driver = { |
|
.name = DRIVER_NAME, |
|
.probe = redrat3_dev_probe, |
|
.disconnect = redrat3_dev_disconnect, |
|
.suspend = redrat3_dev_suspend, |
|
.resume = redrat3_dev_resume, |
|
.reset_resume = redrat3_dev_resume, |
|
.id_table = redrat3_dev_table |
|
}; |
|
|
|
module_usb_driver(redrat3_dev_driver); |
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC); |
|
MODULE_AUTHOR(DRIVER_AUTHOR); |
|
MODULE_AUTHOR(DRIVER_AUTHOR2); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_DEVICE_TABLE(usb, redrat3_dev_table);
|
|
|