From e23fb9643bd440fee9106e6df76f01a57db2613c Mon Sep 17 00:00:00 2001 From: Jarod Wilson Date: Wed, 16 Jun 2010 17:55:52 -0300 Subject: [PATCH] V4L/DVB: IR/mceusb: add tx callback functions and wire up mchehab: merged with IR/mceusb: userspace buffer copy moved out of driver Userspace buffer copy moved out of driver and into lirc bridge driver [mchehab@redhat.com: merged the patch to avoid compilation errors with allyesconfig ] Signed-off-by: Jarod Wilson Signed-off-by: Mauro Carvalho Chehab --- drivers/media/IR/mceusb.c | 148 +++++++++++++++++++++++++++++++++++--- 1 file changed, 138 insertions(+), 10 deletions(-) diff --git a/drivers/media/IR/mceusb.c b/drivers/media/IR/mceusb.c index 708a71a38443..cc8e2ef28b66 100644 --- a/drivers/media/IR/mceusb.c +++ b/drivers/media/IR/mceusb.c @@ -15,10 +15,6 @@ * Jon Smirl, which included enhancements and simplifications to the * incoming IR buffer parsing routines. * - * TODO: - * - add rc-core transmit support, once available - * - enable support for forthcoming ir-lirc-codec interface - * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -51,7 +47,6 @@ #define DRIVER_NAME "mceusb" #define USB_BUFLEN 32 /* USB reception buffer length */ -#define IRBUF_SIZE 256 /* IR work buffer length */ #define USB_CTRL_MSG_SZ 2 /* Size of usb ctrl msg on gen1 hw */ #define MCE_G1_INIT_MSGS 40 /* Init messages on gen1 hw to throw out */ @@ -263,14 +258,13 @@ struct mceusb_dev { u32 reserved:28; } flags; - /* handle sending (init strings) */ + /* transmit support */ int send_flags; - int carrier; + u32 carrier; + unsigned char tx_mask; char name[128]; char phys[64]; - - unsigned char tx_mask; }; /* @@ -520,6 +514,91 @@ static void mce_sync_in(struct mceusb_dev *ir, unsigned char *data, int size) mce_request_packet(ir, ir->usb_ep_in, data, size, MCEUSB_RX); } +/* Send data out the IR blaster port(s) */ +static int mceusb_tx_ir(void *priv, int *txbuf, u32 n) +{ + struct mceusb_dev *ir = priv; + int i, ret = 0; + int count, cmdcount = 0; + unsigned char *cmdbuf; /* MCE command buffer */ + long signal_duration = 0; /* Singnal length in us */ + struct timeval start_time, end_time; + + do_gettimeofday(&start_time); + + count = n / sizeof(int); + + cmdbuf = kzalloc(sizeof(int) * MCE_CMDBUF_SIZE, GFP_KERNEL); + if (!cmdbuf) + return -ENOMEM; + + /* MCE tx init header */ + cmdbuf[cmdcount++] = MCE_CONTROL_HEADER; + cmdbuf[cmdcount++] = 0x08; + cmdbuf[cmdcount++] = ir->tx_mask; + + /* Generate mce packet data */ + for (i = 0; (i < count) && (cmdcount < MCE_CMDBUF_SIZE); i++) { + signal_duration += txbuf[i]; + txbuf[i] = txbuf[i] / MCE_TIME_UNIT; + + do { /* loop to support long pulses/spaces > 127*50us=6.35ms */ + + /* Insert mce packet header every 4th entry */ + if ((cmdcount < MCE_CMDBUF_SIZE) && + (cmdcount - MCE_TX_HEADER_LENGTH) % + MCE_CODE_LENGTH == 0) + cmdbuf[cmdcount++] = MCE_PACKET_HEADER; + + /* Insert mce packet data */ + if (cmdcount < MCE_CMDBUF_SIZE) + cmdbuf[cmdcount++] = + (txbuf[i] < MCE_PULSE_BIT ? + txbuf[i] : MCE_MAX_PULSE_LENGTH) | + (i & 1 ? 0x00 : MCE_PULSE_BIT); + else { + ret = -EINVAL; + goto out; + } + + } while ((txbuf[i] > MCE_MAX_PULSE_LENGTH) && + (txbuf[i] -= MCE_MAX_PULSE_LENGTH)); + } + + /* Fix packet length in last header */ + cmdbuf[cmdcount - (cmdcount - MCE_TX_HEADER_LENGTH) % MCE_CODE_LENGTH] = + 0x80 + (cmdcount - MCE_TX_HEADER_LENGTH) % MCE_CODE_LENGTH - 1; + + /* Check if we have room for the empty packet at the end */ + if (cmdcount >= MCE_CMDBUF_SIZE) { + ret = -EINVAL; + goto out; + } + + /* All mce commands end with an empty packet (0x80) */ + cmdbuf[cmdcount++] = 0x80; + + /* Transmit the command to the mce device */ + mce_async_out(ir, cmdbuf, cmdcount); + + /* + * The lircd gap calculation expects the write function to + * wait the time it takes for the ircommand to be sent before + * it returns. + */ + do_gettimeofday(&end_time); + signal_duration -= (end_time.tv_usec - start_time.tv_usec) + + (end_time.tv_sec - start_time.tv_sec) * 1000000; + + /* delay with the closest number of ticks */ + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(usecs_to_jiffies(signal_duration)); + +out: + kfree(cmdbuf); + return ret ? ret : n; +} + /* Sets active IR outputs -- mce devices typically (all?) have two */ static int mceusb_set_tx_mask(void *priv, u32 mask) { @@ -533,6 +612,49 @@ static int mceusb_set_tx_mask(void *priv, u32 mask) return 0; } +/* Sets the send carrier frequency and mode */ +static int mceusb_set_tx_carrier(void *priv, u32 carrier) +{ + struct mceusb_dev *ir = priv; + int clk = 10000000; + int prescaler = 0, divisor = 0; + unsigned char cmdbuf[4] = { 0x9f, 0x06, 0x00, 0x00 }; + + /* Carrier has changed */ + if (ir->carrier != carrier) { + + if (carrier == 0) { + ir->carrier = carrier; + cmdbuf[2] = 0x01; + cmdbuf[3] = 0x80; + dev_dbg(ir->dev, "%s: disabling carrier " + "modulation\n", __func__); + mce_async_out(ir, cmdbuf, sizeof(cmdbuf)); + return carrier; + } + + for (prescaler = 0; prescaler < 4; ++prescaler) { + divisor = (clk >> (2 * prescaler)) / carrier; + if (divisor <= 0xFF) { + ir->carrier = carrier; + cmdbuf[2] = prescaler; + cmdbuf[3] = divisor; + dev_dbg(ir->dev, "%s: requesting %u HZ " + "carrier\n", __func__, carrier); + + /* Transmit new carrier to mce device */ + mce_async_out(ir, cmdbuf, sizeof(cmdbuf)); + return carrier; + } + } + + return -EINVAL; + + } + + return carrier; +} + static void mceusb_process_ir_data(struct mceusb_dev *ir, int buf_len) { struct ir_raw_event rawir = { .pulse = false, .duration = 0 }; @@ -724,6 +846,9 @@ static void mceusb_gen2_init(struct mceusb_dev *ir) mce_sync_in(ir, NULL, maxp); mce_sync_in(ir, NULL, maxp); + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(msecs_to_jiffies(100)); + /* device reset */ mce_async_out(ir, DEVICE_RESET, sizeof(DEVICE_RESET)); mce_sync_in(ir, NULL, maxp); @@ -791,7 +916,7 @@ static struct input_dev *mceusb_init_input_dev(struct mceusb_dev *ir) goto ir_dev_alloc_failed; } - snprintf(ir->name, sizeof(ir->name), "Media Center Edition eHome " + snprintf(ir->name, sizeof(ir->name), "Media Center Ed. eHome " "Infrared Remote Transceiver (%04x:%04x)", le16_to_cpu(ir->usbdev->descriptor.idVendor), le16_to_cpu(ir->usbdev->descriptor.idProduct)); @@ -804,6 +929,9 @@ static struct input_dev *mceusb_init_input_dev(struct mceusb_dev *ir) props->priv = ir; props->driver_type = RC_DRIVER_IR_RAW; props->allowed_protos = IR_TYPE_ALL; + props->s_tx_mask = mceusb_set_tx_mask; + props->s_tx_carrier = mceusb_set_tx_carrier; + props->tx_ir = mceusb_tx_ir; ir->props = props; ir->irdev = irdev; -- 2.20.1