--- /dev/null
+/*
+ * tm6000-input.c - driver for TM5600/TM6000/TM6010 USB video capture devices
+ *
+ * Copyright (C) 2010 Stefan Ringel <stefan.ringel@arcor.de>
+ *
+ * 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 version 2
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+
+#include <linux/input.h>
+#include <linux/usb.h>
+
+#include <media/rc-core.h>
+
+#include "tm6000.h"
+#include "tm6000-regs.h"
+
+static unsigned int ir_debug;
+module_param(ir_debug, int, 0644);
+MODULE_PARM_DESC(ir_debug, "debug message level");
+
+static unsigned int enable_ir = 1;
+module_param(enable_ir, int, 0644);
+MODULE_PARM_DESC(enable_ir, "enable ir (default is enable)");
+
+static unsigned int ir_clock_mhz = 12;
+module_param(ir_clock_mhz, int, 0644);
+MODULE_PARM_DESC(enable_ir, "ir clock, in MHz");
+
+#define URB_SUBMIT_DELAY 100 /* ms - Delay to submit an URB request on retrial and init */
+#define URB_INT_LED_DELAY 100 /* ms - Delay to turn led on again on int mode */
+
+#undef dprintk
+
+#define dprintk(level, fmt, arg...) do {\
+ if (ir_debug >= level) \
+ printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
+ } while (0)
+
+struct tm6000_ir_poll_result {
+ u16 rc_data;
+};
+
+struct tm6000_IR {
+ struct tm6000_core *dev;
+ struct rc_dev *rc;
+ char name[32];
+ char phys[32];
+
+ /* poll expernal decoder */
+ int polling;
+ struct delayed_work work;
+ u8 wait:1;
+ u8 pwled:2;
+ u8 submit_urb:1;
+ u16 key_addr;
+ struct urb *int_urb;
+
+ /* IR device properties */
+ u64 rc_type;
+};
+
+void tm6000_ir_wait(struct tm6000_core *dev, u8 state)
+{
+ struct tm6000_IR *ir = dev->ir;
+
+ if (!dev->ir)
+ return;
+
+ dprintk(2, "%s: %i\n",__func__, ir->wait);
+
+ if (state)
+ ir->wait = 1;
+ else
+ ir->wait = 0;
+}
+
+static int tm6000_ir_config(struct tm6000_IR *ir)
+{
+ struct tm6000_core *dev = ir->dev;
+ u32 pulse = 0, leader = 0;
+
+ dprintk(2, "%s\n",__func__);
+
+ /*
+ * The IR decoder supports RC-5 or NEC, with a configurable timing.
+ * The timing configuration there is not that accurate, as it uses
+ * approximate values. The NEC spec mentions a 562.5 unit period,
+ * and RC-5 uses a 888.8 period.
+ * Currently, driver assumes a clock provided by a 12 MHz XTAL, but
+ * a modprobe parameter can adjust it.
+ * Adjustments are required for other timings.
+ * It seems that the 900ms timing for NEC is used to detect a RC-5
+ * IR, in order to discard such decoding
+ */
+
+ switch (ir->rc_type) {
+ case RC_BIT_NEC:
+ leader = 900; /* ms */
+ pulse = 700; /* ms - the actual value would be 562 */
+ break;
+ default:
+ case RC_BIT_RC5:
+ leader = 900; /* ms - from the NEC decoding */
+ pulse = 1780; /* ms - The actual value would be 1776 */
+ break;
+ }
+
+ pulse = ir_clock_mhz * pulse;
+ leader = ir_clock_mhz * leader;
+ if (ir->rc_type == RC_BIT_NEC)
+ leader = leader | 0x8000;
+
+ dprintk(2, "%s: %s, %d MHz, leader = 0x%04x, pulse = 0x%06x \n",
+ __func__,
+ (ir->rc_type == RC_BIT_NEC) ? "NEC" : "RC-5",
+ ir_clock_mhz, leader, pulse);
+
+ /* Remote WAKEUP = enable, normal mode, from IR decoder output */
+ tm6000_set_reg(dev, TM6010_REQ07_RE5_REMOTE_WAKEUP, 0xfe);
+
+ /* Enable IR reception on non-busrt mode */
+ tm6000_set_reg(dev, TM6010_REQ07_RD8_IR, 0x2f);
+
+ /* IR_WKUP_SEL = Low byte in decoded IR data */
+ tm6000_set_reg(dev, TM6010_REQ07_RDA_IR_WAKEUP_SEL, 0xff);
+ /* IR_WKU_ADD code */
+ tm6000_set_reg(dev, TM6010_REQ07_RDB_IR_WAKEUP_ADD, 0xff);
+
+ tm6000_set_reg(dev, TM6010_REQ07_RDC_IR_LEADER1, leader >> 8);
+ tm6000_set_reg(dev, TM6010_REQ07_RDD_IR_LEADER0, leader);
+
+ tm6000_set_reg(dev, TM6010_REQ07_RDE_IR_PULSE_CNT1, pulse >> 8);
+ tm6000_set_reg(dev, TM6010_REQ07_RDF_IR_PULSE_CNT0, pulse);
+
+ if (!ir->polling)
+ tm6000_set_reg(dev, REQ_04_EN_DISABLE_MCU_INT, 2, 0);
+ else
+ tm6000_set_reg(dev, REQ_04_EN_DISABLE_MCU_INT, 2, 1);
+ msleep(10);
+
+ /* Shows that IR is working via the LED */
+ tm6000_flash_led(dev, 0);
+ msleep(100);
+ tm6000_flash_led(dev, 1);
+ ir->pwled = 1;
+
+ return 0;
+}
+
+static void tm6000_ir_keydown(struct tm6000_IR *ir,
+ const char *buf, unsigned int len)
+{
+ u8 device, command;
+ u32 scancode;
+ enum rc_type protocol;
+
+ if (len < 1)
+ return;
+
+ command = buf[0];
+ device = (len > 1 ? buf[1] : 0x0);
+ switch (ir->rc_type) {
+ case RC_BIT_RC5:
+ protocol = RC_TYPE_RC5;
+ scancode = RC_SCANCODE_RC5(device, command);
+ break;
+ case RC_BIT_NEC:
+ protocol = RC_TYPE_NEC;
+ scancode = RC_SCANCODE_NEC(device, command);
+ break;
+ default:
+ protocol = RC_TYPE_OTHER;
+ scancode = RC_SCANCODE_OTHER(device << 8 | command);
+ break;
+ }
+
+ dprintk(1, "%s, protocol: 0x%04x, scancode: 0x%08x\n",
+ __func__, protocol, scancode);
+ rc_keydown(ir->rc, protocol, scancode, 0);
+}
+
+static void tm6000_ir_urb_received(struct urb *urb)
+{
+ struct tm6000_core *dev = urb->context;
+ struct tm6000_IR *ir = dev->ir;
+ char *buf;
+
+ dprintk(2, "%s\n",__func__);
+ if (urb->status < 0 || urb->actual_length <= 0) {
+ printk(KERN_INFO "tm6000: IR URB failure: status: %i, length %i\n",
+ urb->status, urb->actual_length);
+ ir->submit_urb = 1;
+ schedule_delayed_work(&ir->work, msecs_to_jiffies(URB_SUBMIT_DELAY));
+ return;
+ }
+ buf = urb->transfer_buffer;
+
+ if (ir_debug)
+ print_hex_dump(KERN_DEBUG, "tm6000: IR data: ",
+ DUMP_PREFIX_OFFSET,16, 1,
+ buf, urb->actual_length, false);
+
+ tm6000_ir_keydown(ir, urb->transfer_buffer, urb->actual_length);
+
+ usb_submit_urb(urb, GFP_ATOMIC);
+ /*
+ * Flash the led. We can't do it here, as it is running on IRQ context.
+ * So, use the scheduler to do it, in a few ms.
+ */
+ ir->pwled = 2;
+ schedule_delayed_work(&ir->work, msecs_to_jiffies(10));
+}
+
+static void tm6000_ir_handle_key(struct work_struct *work)
+{
+ struct tm6000_IR *ir = container_of(work, struct tm6000_IR, work.work);
+ struct tm6000_core *dev = ir->dev;
+ int rc;
+ u8 buf[2];
+
+ if (ir->wait)
+ return;
+
+ dprintk(3, "%s\n",__func__);
+
+ rc = tm6000_read_write_usb(dev, USB_DIR_IN |
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ REQ_02_GET_IR_CODE, 0, 0, buf, 2);
+ if (rc < 0)
+ return;
+
+ /* Check if something was read */
+ if ((buf[0] & 0xff) == 0xff) {
+ if (!ir->pwled) {
+ tm6000_flash_led(dev, 1);
+ ir->pwled = 1;
+ }
+ return;
+ }
+
+ tm6000_ir_keydown(ir, buf, rc);
+ tm6000_flash_led(dev, 0);
+ ir->pwled = 0;
+
+ /* Re-schedule polling */
+ schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
+}
+
+static void tm6000_ir_int_work(struct work_struct *work)
+{
+ struct tm6000_IR *ir = container_of(work, struct tm6000_IR, work.work);
+ struct tm6000_core *dev = ir->dev;
+ int rc;
+
+ dprintk(3, "%s, submit_urb = %d, pwled = %d\n",__func__, ir->submit_urb,
+ ir->pwled);
+
+ if (ir->submit_urb) {
+ dprintk(3, "Resubmit urb\n");
+ tm6000_set_reg(dev, REQ_04_EN_DISABLE_MCU_INT, 2, 0);
+
+ rc = usb_submit_urb(ir->int_urb, GFP_ATOMIC);
+ if (rc < 0) {
+ printk(KERN_ERR "tm6000: Can't submit an IR interrupt. Error %i\n",
+ rc);
+ /* Retry in 100 ms */
+ schedule_delayed_work(&ir->work, msecs_to_jiffies(URB_SUBMIT_DELAY));
+ return;
+ }
+ ir->submit_urb = 0;
+ }
+
+ /* Led is enabled only if USB submit doesn't fail */
+ if (ir->pwled == 2) {
+ tm6000_flash_led(dev, 0);
+ ir->pwled = 0;
+ schedule_delayed_work(&ir->work, msecs_to_jiffies(URB_INT_LED_DELAY));
+ } else if (!ir->pwled) {
+ tm6000_flash_led(dev, 1);
+ ir->pwled = 1;
+ }
+}
+
+static int tm6000_ir_start(struct rc_dev *rc)
+{
+ struct tm6000_IR *ir = rc->priv;
+
+ dprintk(2, "%s\n",__func__);
+
+ schedule_delayed_work(&ir->work, 0);
+
+ return 0;
+}
+
+static void tm6000_ir_stop(struct rc_dev *rc)
+{
+ struct tm6000_IR *ir = rc->priv;
+
+ dprintk(2, "%s\n",__func__);
+
+ cancel_delayed_work_sync(&ir->work);
+}
+
+static int tm6000_ir_change_protocol(struct rc_dev *rc, u64 *rc_type)
+{
+ struct tm6000_IR *ir = rc->priv;
+
+ if (!ir)
+ return 0;
+
+ dprintk(2, "%s\n",__func__);
+
+ if ((rc->rc_map.scan) && (*rc_type == RC_BIT_NEC))
+ ir->key_addr = ((rc->rc_map.scan[0].scancode >> 8) & 0xffff);
+
+ ir->rc_type = *rc_type;
+
+ tm6000_ir_config(ir);
+ /* TODO */
+ return 0;
+}
+
+static int __tm6000_ir_int_start(struct rc_dev *rc)
+{
+ struct tm6000_IR *ir = rc->priv;
+ struct tm6000_core *dev;
+ int pipe, size;
+ int err = -ENOMEM;
+
+ if (!ir)
+ return -ENODEV;
+ dev = ir->dev;
+
+ dprintk(2, "%s\n",__func__);
+
+ ir->int_urb = usb_alloc_urb(0, GFP_ATOMIC);
+ if (!ir->int_urb)
+ return -ENOMEM;
+
+ pipe = usb_rcvintpipe(dev->udev,
+ dev->int_in.endp->desc.bEndpointAddress
+ & USB_ENDPOINT_NUMBER_MASK);
+
+ size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
+ dprintk(1, "IR max size: %d\n", size);
+
+ ir->int_urb->transfer_buffer = kzalloc(size, GFP_ATOMIC);
+ if (ir->int_urb->transfer_buffer == NULL) {
+ usb_free_urb(ir->int_urb);
+ return err;
+ }
+ dprintk(1, "int interval: %d\n", dev->int_in.endp->desc.bInterval);
+
+ usb_fill_int_urb(ir->int_urb, dev->udev, pipe,
+ ir->int_urb->transfer_buffer, size,
+ tm6000_ir_urb_received, dev,
+ dev->int_in.endp->desc.bInterval);
+
+ ir->submit_urb = 1;
+ schedule_delayed_work(&ir->work, msecs_to_jiffies(URB_SUBMIT_DELAY));
+
+ return 0;
+}
+
+static void __tm6000_ir_int_stop(struct rc_dev *rc)
+{
+ struct tm6000_IR *ir = rc->priv;
+
+ if (!ir || !ir->int_urb)
+ return;
+
+ dprintk(2, "%s\n",__func__);
+
+ usb_kill_urb(ir->int_urb);
+ kfree(ir->int_urb->transfer_buffer);
+ usb_free_urb(ir->int_urb);
+ ir->int_urb = NULL;
+}
+
+int tm6000_ir_int_start(struct tm6000_core *dev)
+{
+ struct tm6000_IR *ir = dev->ir;
+
+ if (!ir)
+ return 0;
+
+ return __tm6000_ir_int_start(ir->rc);
+}
+
+void tm6000_ir_int_stop(struct tm6000_core *dev)
+{
+ struct tm6000_IR *ir = dev->ir;
+
+ if (!ir || !ir->rc)
+ return;
+
+ __tm6000_ir_int_stop(ir->rc);
+}
+
+int tm6000_ir_init(struct tm6000_core *dev)
+{
+ struct tm6000_IR *ir;
+ struct rc_dev *rc;
+ int err = -ENOMEM;
+ u64 rc_type;
+
+ if (!enable_ir)
+ return -ENODEV;
+
+ if (!dev->caps.has_remote)
+ return 0;
+
+ if (!dev->ir_codes)
+ return 0;
+
+ ir = kzalloc(sizeof(*ir), GFP_ATOMIC);
+ rc = rc_allocate_device();
+ if (!ir || !rc)
+ goto out;
+
+ dprintk(2, "%s\n", __func__);
+
+ /* record handles to ourself */
+ ir->dev = dev;
+ dev->ir = ir;
+ ir->rc = rc;
+
+ /* input setup */
+ rc->allowed_protocols = RC_BIT_RC5 | RC_BIT_NEC;
+ /* Neded, in order to support NEC remotes with 24 or 32 bits */
+ rc->scancode_mask = 0xffff;
+ rc->priv = ir;
+ rc->change_protocol = tm6000_ir_change_protocol;
+ if (dev->int_in.endp) {
+ rc->open = __tm6000_ir_int_start;
+ rc->close = __tm6000_ir_int_stop;
+ INIT_DELAYED_WORK(&ir->work, tm6000_ir_int_work);
+ } else {
+ rc->open = tm6000_ir_start;
+ rc->close = tm6000_ir_stop;
+ ir->polling = 50;
+ INIT_DELAYED_WORK(&ir->work, tm6000_ir_handle_key);
+ }
+ rc->driver_type = RC_DRIVER_SCANCODE;
+
+ snprintf(ir->name, sizeof(ir->name), "tm5600/60x0 IR (%s)",
+ dev->name);
+
+ usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
+ strlcat(ir->phys, "/input0", sizeof(ir->phys));
+
+ rc_type = RC_BIT_UNKNOWN;
+ tm6000_ir_change_protocol(rc, &rc_type);
+
+ rc->input_name = ir->name;
+ rc->input_phys = ir->phys;
+ rc->input_id.bustype = BUS_USB;
+ rc->input_id.version = 1;
+ rc->input_id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
+ rc->input_id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
+ rc->map_name = dev->ir_codes;
+ rc->driver_name = "tm6000";
+ rc->dev.parent = &dev->udev->dev;
+
+ /* ir register */
+ err = rc_register_device(rc);
+ if (err)
+ goto out;
+
+ return 0;
+
+out:
+ dev->ir = NULL;
+ rc_free_device(rc);
+ kfree(ir);
+ return err;
+}
+
+int tm6000_ir_fini(struct tm6000_core *dev)
+{
+ struct tm6000_IR *ir = dev->ir;
+
+ /* skip detach on non attached board */
+
+ if (!ir)
+ return 0;
+
+ dprintk(2, "%s\n",__func__);
+
+ if (!ir->polling)
+ __tm6000_ir_int_stop(ir->rc);
+
+ tm6000_ir_stop(ir->rc);
+
+ /* Turn off the led */
+ tm6000_flash_led(dev, 0);
+ ir->pwled = 0;
+
+ rc_unregister_device(ir->rc);
+
+ kfree(ir);
+ dev->ir = NULL;
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff