--- /dev/null
+/*
+ * USB RedRat3 IR Transceiver rc-core driver
+ *
+ * Copyright (c) 2011 by Jarod Wilson <jarod@redhat.com>
+ * based heavily on the work of Stephen Cox, with additional
+ * help from RedRat Ltd.
+ *
+ * This driver began life based an an old version of the first-generation
+ * lirc_mceusb driver from the lirc 0.7.2 distribution. It was then
+ * significantly rewritten by Stephen Cox with the aid of RedRat Ltd's
+ * Chris Dodge.
+ *
+ * The driver was then ported to rc-core and significantly rewritten again,
+ * by Jarod, using the in-kernel mceusb driver as a guide, after an initial
+ * port effort was started by Stephen.
+ *
+ * TODO LIST:
+ * - fix lirc not showing repeats properly
+ * --
+ *
+ * The RedRat3 is a USB transceiver with both send & receive,
+ * with 2 separate sensors available for receive to enable
+ * both good long range reception for general use, and good
+ * short range reception when required for learning a signal.
+ *
+ * http://www.redrat.co.uk/
+ *
+ * It uses its own little protocol to communicate, the required
+ * parts of which are embedded within this driver.
+ * --
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <asm/unaligned.h>
+#include <linux/device.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/usb/input.h>
+#include <media/rc-core.h>
+
+/* Driver Information */
+#define DRIVER_AUTHOR "Jarod Wilson <jarod@redhat.com>"
+#define DRIVER_AUTHOR2 "The Dweller, Stephen Cox"
+#define DRIVER_DESC "RedRat3 USB IR Transceiver Driver"
+#define DRIVER_NAME "redrat3"
+
+/* bulk data transfer types */
+#define RR3_ERROR 0x01
+#define RR3_MOD_SIGNAL_IN 0x20
+#define RR3_MOD_SIGNAL_OUT 0x21
+
+/* Get the RR firmware version */
+#define RR3_FW_VERSION 0xb1
+#define RR3_FW_VERSION_LEN 64
+/* Send encoded signal bulk-sent earlier*/
+#define RR3_TX_SEND_SIGNAL 0xb3
+#define RR3_SET_IR_PARAM 0xb7
+#define RR3_GET_IR_PARAM 0xb8
+/* Blink the red LED on the device */
+#define RR3_BLINK_LED 0xb9
+/* Read serial number of device */
+#define RR3_READ_SER_NO 0xba
+#define RR3_SER_NO_LEN 4
+/* Start capture with the RC receiver */
+#define RR3_RC_DET_ENABLE 0xbb
+/* Stop capture with the RC receiver */
+#define RR3_RC_DET_DISABLE 0xbc
+/* Return the status of RC detector capture */
+#define RR3_RC_DET_STATUS 0xbd
+/* Reset redrat */
+#define RR3_RESET 0xa0
+
+/* Max number of lengths in the signal. */
+#define RR3_IR_IO_MAX_LENGTHS 0x01
+/* Periods to measure mod. freq. */
+#define RR3_IR_IO_PERIODS_MF 0x02
+/* Size of memory for main signal data */
+#define RR3_IR_IO_SIG_MEM_SIZE 0x03
+/* Delta value when measuring lengths */
+#define RR3_IR_IO_LENGTH_FUZZ 0x04
+/* Timeout for end of signal detection */
+#define RR3_IR_IO_SIG_TIMEOUT 0x05
+/* Minimum value for pause recognition. */
+#define RR3_IR_IO_MIN_PAUSE 0x06
+
+/* Clock freq. of EZ-USB chip */
+#define RR3_CLK 24000000
+/* Clock periods per timer count */
+#define RR3_CLK_PER_COUNT 12
+/* (RR3_CLK / RR3_CLK_PER_COUNT) */
+#define RR3_CLK_CONV_FACTOR 2000000
+/* USB bulk-in IR data endpoint address */
+#define RR3_BULK_IN_EP_ADDR 0x82
+
+/* Size of the fixed-length portion of the signal */
+#define RR3_DRIVER_MAXLENS 128
+#define RR3_MAX_SIG_SIZE 512
+#define RR3_TIME_UNIT 50
+#define RR3_END_OF_SIGNAL 0x7f
+#define RR3_TX_TRAILER_LEN 2
+#define RR3_RX_MIN_TIMEOUT 5
+#define RR3_RX_MAX_TIMEOUT 2000
+
+/* The 8051's CPUCS Register address */
+#define RR3_CPUCS_REG_ADDR 0x7f92
+
+#define USB_RR3USB_VENDOR_ID 0x112a
+#define USB_RR3USB_PRODUCT_ID 0x0001
+#define USB_RR3IIUSB_PRODUCT_ID 0x0005
+
+struct redrat3_header {
+ __be16 length;
+ __be16 transfer_type;
+} __packed;
+
+/* sending and receiving irdata */
+struct redrat3_irdata {
+ struct redrat3_header header;
+ __be32 pause;
+ __be16 mod_freq_count;
+ __be16 num_periods;
+ __u8 max_lengths;
+ __u8 no_lengths;
+ __be16 max_sig_size;
+ __be16 sig_size;
+ __u8 no_repeats;
+ __be16 lens[RR3_DRIVER_MAXLENS]; /* not aligned */
+ __u8 sigdata[RR3_MAX_SIG_SIZE];
+} __packed;
+
+/* firmware errors */
+struct redrat3_error {
+ struct redrat3_header header;
+ __be16 fw_error;
+} __packed;
+
+/* table of devices that work with this driver */
+static struct usb_device_id redrat3_dev_table[] = {
+ /* Original version of the RedRat3 */
+ {USB_DEVICE(USB_RR3USB_VENDOR_ID, USB_RR3USB_PRODUCT_ID)},
+ /* Second Version/release of the RedRat3 - RetRat3-II */
+ {USB_DEVICE(USB_RR3USB_VENDOR_ID, USB_RR3IIUSB_PRODUCT_ID)},
+ {} /* Terminating entry */
+};
+
+/* Structure to hold all of our device specific stuff */
+struct redrat3_dev {
+ /* core device bits */
+ struct rc_dev *rc;
+ struct device *dev;
+
+ /* led control */
+ struct led_classdev led;
+ atomic_t flash;
+ struct usb_ctrlrequest flash_control;
+ struct urb *flash_urb;
+ u8 flash_in_buf;
+
+ /* save off the usb device pointer */
+ struct usb_device *udev;
+
+ /* the receive endpoint */
+ struct usb_endpoint_descriptor *ep_in;
+ /* the buffer to receive data */
+ void *bulk_in_buf;
+ /* urb used to read ir data */
+ struct urb *read_urb;
+
+ /* the send endpoint */
+ struct usb_endpoint_descriptor *ep_out;
+
+ /* usb dma */
+ dma_addr_t dma_in;
+
+ /* rx signal timeout timer */
+ struct timer_list rx_timeout;
+ u32 hw_timeout;
+
+ /* Is the device currently transmitting?*/
+ bool transmitting;
+
+ /* store for current packet */
+ struct redrat3_irdata irdata;
+ u16 bytes_read;
+
+ u32 carrier;
+
+ char name[64];
+ char phys[64];
+};
+
+/*
+ * redrat3_issue_async
+ *
+ * Issues an async read to the ir data in port..
+ * sets the callback to be redrat3_handle_async
+ */
+static void redrat3_issue_async(struct redrat3_dev *rr3)
+{
+ int res;
+
+ res = usb_submit_urb(rr3->read_urb, GFP_ATOMIC);
+ if (res)
+ dev_dbg(rr3->dev,
+ "%s: receive request FAILED! (res %d, len %d)\n",
+ __func__, res, rr3->read_urb->transfer_buffer_length);
+}
+
+static void redrat3_dump_fw_error(struct redrat3_dev *rr3, int code)
+{
+ if (!rr3->transmitting && (code != 0x40))
+ dev_info(rr3->dev, "fw error code 0x%02x: ", code);
+
+ switch (code) {
+ case 0x00:
+ pr_cont("No Error\n");
+ break;
+
+ /* Codes 0x20 through 0x2f are IR Firmware Errors */
+ case 0x20:
+ pr_cont("Initial signal pulse not long enough "
+ "to measure carrier frequency\n");
+ break;
+ case 0x21:
+ pr_cont("Not enough length values allocated for signal\n");
+ break;
+ case 0x22:
+ pr_cont("Not enough memory allocated for signal data\n");
+ break;
+ case 0x23:
+ pr_cont("Too many signal repeats\n");
+ break;
+ case 0x28:
+ pr_cont("Insufficient memory available for IR signal "
+ "data memory allocation\n");
+ break;
+ case 0x29:
+ pr_cont("Insufficient memory available "
+ "for IrDa signal data memory allocation\n");
+ break;
+
+ /* Codes 0x30 through 0x3f are USB Firmware Errors */
+ case 0x30:
+ pr_cont("Insufficient memory available for bulk "
+ "transfer structure\n");
+ break;
+
+ /*
+ * Other error codes... These are primarily errors that can occur in
+ * the control messages sent to the redrat
+ */
+ case 0x40:
+ if (!rr3->transmitting)
+ pr_cont("Signal capture has been terminated\n");
+ break;
+ case 0x41:
+ pr_cont("Attempt to set/get and unknown signal I/O "
+ "algorithm parameter\n");
+ break;
+ case 0x42:
+ pr_cont("Signal capture already started\n");
+ break;
+
+ default:
+ pr_cont("Unknown Error\n");
+ break;
+ }
+}
+
+static u32 redrat3_val_to_mod_freq(struct redrat3_irdata *irdata)
+{
+ u32 mod_freq = 0;
+ u16 mod_freq_count = be16_to_cpu(irdata->mod_freq_count);
+
+ if (mod_freq_count != 0)
+ mod_freq = (RR3_CLK * be16_to_cpu(irdata->num_periods)) /
+ (mod_freq_count * RR3_CLK_PER_COUNT);
+
+ return mod_freq;
+}
+
+/* this function scales down the figures for the same result... */
+static u32 redrat3_len_to_us(u32 length)
+{
+ u32 biglen = length * 1000;
+ u32 divisor = (RR3_CLK_CONV_FACTOR) / 1000;
+ u32 result = (u32) (biglen / divisor);
+
+ /* don't allow zero lengths to go back, breaks lirc */
+ return result ? result : 1;
+}
+
+/*
+ * convert us back into redrat3 lengths
+ *
+ * length * 1000 length * 1000000
+ * ------------- = ---------------- = micro
+ * rr3clk / 1000 rr3clk
+
+ * 6 * 2 4 * 3 micro * rr3clk micro * rr3clk / 1000
+ * ----- = 4 ----- = 6 -------------- = len ---------------------
+ * 3 2 1000000 1000
+ */
+static u32 redrat3_us_to_len(u32 microsec)
+{
+ u32 result;
+ u32 divisor;
+
+ microsec &= IR_MAX_DURATION;
+ divisor = (RR3_CLK_CONV_FACTOR / 1000);
+ result = (u32)(microsec * divisor) / 1000;
+
+ /* don't allow zero lengths to go back, breaks lirc */
+ return result ? result : 1;
+}
+
+/* timer callback to send reset event */
+static void redrat3_rx_timeout(unsigned long data)
+{
+ struct redrat3_dev *rr3 = (struct redrat3_dev *)data;
+
+ dev_dbg(rr3->dev, "calling ir_raw_event_reset\n");
+ ir_raw_event_reset(rr3->rc);
+}
+
+static void redrat3_process_ir_data(struct redrat3_dev *rr3)
+{
+ DEFINE_IR_RAW_EVENT(rawir);
+ struct device *dev;
+ unsigned i, trailer = 0;
+ unsigned sig_size, single_len, offset, val;
+ unsigned long delay;
+ u32 mod_freq;
+
+ if (!rr3) {
+ pr_err("%s called with no context!\n", __func__);
+ return;
+ }
+
+ dev = rr3->dev;
+
+ /* Make sure we reset the IR kfifo after a bit of inactivity */
+ delay = usecs_to_jiffies(rr3->hw_timeout);
+ mod_timer(&rr3->rx_timeout, jiffies + delay);
+
+ mod_freq = redrat3_val_to_mod_freq(&rr3->irdata);
+ dev_dbg(dev, "Got mod_freq of %u\n", mod_freq);
+
+ /* process each rr3 encoded byte into an int */
+ sig_size = be16_to_cpu(rr3->irdata.sig_size);
+ for (i = 0; i < sig_size; i++) {
+ offset = rr3->irdata.sigdata[i];
+ val = get_unaligned_be16(&rr3->irdata.lens[offset]);
+ single_len = redrat3_len_to_us(val);
+
+ /* we should always get pulse/space/pulse/space samples */
+ if (i % 2)
+ rawir.pulse = false;
+ else
+ rawir.pulse = true;
+
+ rawir.duration = US_TO_NS(single_len);
+ /* Save initial pulse length to fudge trailer */
+ if (i == 0)
+ trailer = rawir.duration;
+ /* cap the value to IR_MAX_DURATION */
+ rawir.duration &= IR_MAX_DURATION;
+
+ dev_dbg(dev, "storing %s with duration %d (i: %d)\n",
+ rawir.pulse ? "pulse" : "space", rawir.duration, i);
+ ir_raw_event_store_with_filter(rr3->rc, &rawir);
+ }
+
+ /* add a trailing space, if need be */
+ if (i % 2) {
+ rawir.pulse = false;
+ /* this duration is made up, and may not be ideal... */
+ if (trailer < US_TO_NS(1000))
+ rawir.duration = US_TO_NS(2800);
+ else
+ rawir.duration = trailer;
+ dev_dbg(dev, "storing trailing space with duration %d\n",
+ rawir.duration);
+ ir_raw_event_store_with_filter(rr3->rc, &rawir);
+ }
+
+ dev_dbg(dev, "calling ir_raw_event_handle\n");
+ ir_raw_event_handle(rr3->rc);
+}
+
+/* Util fn to send rr3 cmds */
+static u8 redrat3_send_cmd(int cmd, struct redrat3_dev *rr3)
+{
+ struct usb_device *udev;
+ u8 *data;
+ int res;
+
+ data = kzalloc(sizeof(u8), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ udev = rr3->udev;
+ res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), cmd,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x0000, 0x0000, data, sizeof(u8), HZ * 10);
+
+ if (res < 0) {
+ dev_err(rr3->dev, "%s: Error sending rr3 cmd res %d, data %d",
+ __func__, res, *data);
+ res = -EIO;
+ } else
+ res = data[0];
+
+ kfree(data);
+
+ return res;
+}
+
+/* Enables the long range detector and starts async receive */
+static int redrat3_enable_detector(struct redrat3_dev *rr3)
+{
+ struct device *dev = rr3->dev;
+ u8 ret;
+
+ ret = redrat3_send_cmd(RR3_RC_DET_ENABLE, rr3);
+ if (ret != 0)
+ dev_dbg(dev, "%s: unexpected ret of %d\n",
+ __func__, ret);
+
+ ret = redrat3_send_cmd(RR3_RC_DET_STATUS, rr3);
+ if (ret != 1) {
+ dev_err(dev, "%s: detector status: %d, should be 1\n",
+ __func__, ret);
+ return -EIO;
+ }
+
+ redrat3_issue_async(rr3);
+
+ return 0;
+}
+
+static inline void redrat3_delete(struct redrat3_dev *rr3,
+ struct usb_device *udev)
+{
+ usb_kill_urb(rr3->read_urb);
+ usb_kill_urb(rr3->flash_urb);
+ usb_free_urb(rr3->read_urb);
+ usb_free_urb(rr3->flash_urb);
+ usb_free_coherent(udev, le16_to_cpu(rr3->ep_in->wMaxPacketSize),
+ rr3->bulk_in_buf, rr3->dma_in);
+
+ kfree(rr3);
+}
+
+static u32 redrat3_get_timeout(struct redrat3_dev *rr3)
+{
+ __be32 *tmp;
+ u32 timeout = MS_TO_US(150); /* a sane default, if things go haywire */
+ int len, ret, pipe;
+
+ len = sizeof(*tmp);
+ tmp = kzalloc(len, GFP_KERNEL);
+ if (!tmp) {
+ dev_warn(rr3->dev, "Memory allocation faillure\n");
+ return timeout;
+ }
+
+ pipe = usb_rcvctrlpipe(rr3->udev, 0);
+ ret = usb_control_msg(rr3->udev, pipe, RR3_GET_IR_PARAM,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ RR3_IR_IO_SIG_TIMEOUT, 0, tmp, len, HZ * 5);
+ if (ret != len)
+ dev_warn(rr3->dev, "Failed to read timeout from hardware\n");
+ else {
+ timeout = redrat3_len_to_us(be32_to_cpup(tmp));
+
+ dev_dbg(rr3->dev, "Got timeout of %d ms\n", timeout / 1000);
+ }
+
+ kfree(tmp);
+
+ return timeout;
+}
+
+static void redrat3_reset(struct redrat3_dev *rr3)
+{
+ struct usb_device *udev = rr3->udev;
+ struct device *dev = rr3->dev;
+ int rc, rxpipe, txpipe;
+ u8 *val;
+ int len = sizeof(u8);
+
+ rxpipe = usb_rcvctrlpipe(udev, 0);
+ txpipe = usb_sndctrlpipe(udev, 0);
+
+ val = kmalloc(len, GFP_KERNEL);
+ if (!val) {
+ dev_err(dev, "Memory allocation failure\n");
+ return;
+ }
+
+ *val = 0x01;
+ rc = usb_control_msg(udev, rxpipe, RR3_RESET,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ RR3_CPUCS_REG_ADDR, 0, val, len, HZ * 25);
+ dev_dbg(dev, "reset returned 0x%02x\n", rc);
+
+ *val = 5;
+ rc = usb_control_msg(udev, txpipe, RR3_SET_IR_PARAM,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+ 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 = 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 = 0;
+ char *buffer;
+
+ buffer = kzalloc(sizeof(char) * (RR3_FW_VERSION_LEN + 1), GFP_KERNEL);
+ if (!buffer) {
+ dev_err(rr3->dev, "Memory allocation failure\n");
+ 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;
+ int ret;
+
+ if (!urb)
+ return;
+
+ rr3 = urb->context;
+ if (!rr3) {
+ pr_err("%s called with invalid context!\n", __func__);
+ usb_unlink_urb(urb);
+ return;
+ }
+
+ switch (urb->status) {
+ case 0:
+ ret = redrat3_get_ir_data(rr3, urb->actual_length);
+ if (!ret) {
+ /* no error, prepare to read more */
+ redrat3_issue_async(rr3);
+ }
+ 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 carrier;
+}
+
+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 = kzalloc(sizeof(int) * RR3_DRIVER_MAXLENS, GFP_KERNEL);
+ if (!sample_lens) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ 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(sample_lens);
+ kfree(irdata);
+
+ 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 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 = -ENODEV;
+ u16 prod = le16_to_cpu(rr3->udev->descriptor.idProduct);
+
+ rc = rc_allocate_device();
+ if (!rc) {
+ dev_err(dev, "remote input dev allocation failed\n");
+ goto out;
+ }
+
+ snprintf(rr3->name, sizeof(rr3->name), "RedRat3%s "
+ "Infrared Remote Transceiver (%04x:%04x)",
+ prod == USB_RR3IIUSB_PRODUCT_ID ? "-II" : "",
+ le16_to_cpu(rr3->udev->descriptor.idVendor), prod);
+
+ usb_make_path(rr3->udev, rr3->phys, sizeof(rr3->phys));
+
+ rc->input_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->driver_type = RC_DRIVER_IR_RAW;
+ rc->allowed_protocols = RC_BIT_ALL;
+ rc->timeout = US_TO_NS(2750);
+ rc->tx_ir = redrat3_transmit_ir;
+ rc->s_tx_carrier = redrat3_set_tx_carrier;
+ rc->driver_name = DRIVER_NAME;
+ rc->rx_resolution = US_TO_NS(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_in = 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 ((ep_in == NULL) &&
+ ((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 other data... */
+ if (ep->bEndpointAddress == RR3_BULK_IN_EP_ADDR)
+ ep_in = 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_in || !ep_out) {
+ dev_err(dev, "Couldn't find both in and out endpoints\n");
+ retval = -ENODEV;
+ goto no_endpoints;
+ }
+
+ /* allocate memory for our device state and initialize it */
+ rr3 = kzalloc(sizeof(*rr3), GFP_KERNEL);
+ if (rr3 == NULL) {
+ dev_err(dev, "Memory allocation failure\n");
+ goto no_endpoints;
+ }
+
+ rr3->dev = &intf->dev;
+
+ /* set up bulk-in endpoint */
+ rr3->read_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!rr3->read_urb) {
+ dev_err(dev, "Read urb allocation failure\n");
+ goto error;
+ }
+
+ rr3->ep_in = ep_in;
+ rr3->bulk_in_buf = usb_alloc_coherent(udev,
+ le16_to_cpu(ep_in->wMaxPacketSize), GFP_KERNEL, &rr3->dma_in);
+ if (!rr3->bulk_in_buf) {
+ dev_err(dev, "Read buffer allocation failure\n");
+ goto error;
+ }
+
+ pipe = usb_rcvbulkpipe(udev, ep_in->bEndpointAddress);
+ usb_fill_bulk_urb(rr3->read_urb, udev, pipe, rr3->bulk_in_buf,
+ le16_to_cpu(ep_in->wMaxPacketSize), redrat3_handle_async, rr3);
+ rr3->read_urb->transfer_dma = rr3->dma_in;
+ rr3->read_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+ rr3->ep_out = ep_out;
+ rr3->udev = udev;
+
+ redrat3_reset(rr3);
+ redrat3_get_firmware_rev(rr3);
+
+ /* might be all we need to do? */
+ retval = redrat3_enable_detector(rr3);
+ if (retval < 0)
+ goto error;
+
+ /* store current hardware timeout, in us, will use for kfifo resets */
+ rr3->hw_timeout = redrat3_get_timeout(rr3);
+
+ /* default.. will get overridden by any sends with a freq defined */
+ rr3->carrier = 38000;
+
+ /* 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 error;
+
+ atomic_set(&rr3->flash, 0);
+ rr3->flash_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!rr3->flash_urb) {
+ retval = -ENOMEM;
+ goto led_free_error;
+ }
+
+ /* 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);
+
+ rr3->rc = redrat3_init_rc_dev(rr3);
+ if (!rr3->rc) {
+ retval = -ENOMEM;
+ goto led_free_error;
+ }
+ setup_timer(&rr3->rx_timeout, redrat3_rx_timeout, (unsigned long)rr3);
+
+ /* we can register the device now, as it is ready */
+ usb_set_intfdata(intf, rr3);
+
+ return 0;
+
+led_free_error:
+ led_classdev_unregister(&rr3->led);
+error:
+ redrat3_delete(rr3, rr3->udev);
+
+no_endpoints:
+ dev_err(dev, "%s: retval = %x", __func__, retval);
+
+ 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);
+
+ if (!rr3)
+ return;
+
+ usb_set_intfdata(intf, NULL);
+ rc_unregister_device(rr3->rc);
+ led_classdev_unregister(&rr3->led);
+ del_timer_sync(&rr3->rx_timeout);
+ 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->read_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->read_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);
Code Review / kvmfornfv.git / blobdiff