From 2fcfd317f66c6e6cf0e05351e7641898d767dfa4 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Thu, 24 Jul 2014 22:49:02 -0300 Subject: [PATCH] [media] au0828: add support for IR on HVR-950Q HVR-950Q uses an I2C remote controller at address 0x47 (7-bits notation). Add support for it. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/au0828/Kconfig | 7 + drivers/media/usb/au0828/Makefile | 4 + drivers/media/usb/au0828/au0828-cards.c | 1 + drivers/media/usb/au0828/au0828-core.c | 25 +- drivers/media/usb/au0828/au0828-input.c | 386 ++++++++++++++++++++++++ drivers/media/usb/au0828/au0828.h | 11 + 6 files changed, 430 insertions(+), 4 deletions(-) create mode 100644 drivers/media/usb/au0828/au0828-input.c diff --git a/drivers/media/usb/au0828/Kconfig b/drivers/media/usb/au0828/Kconfig index fe48403eadd0..1d410ac8f9a8 100644 --- a/drivers/media/usb/au0828/Kconfig +++ b/drivers/media/usb/au0828/Kconfig @@ -27,3 +27,10 @@ config VIDEO_AU0828_V4L2 Choose Y here to include support for v4l2 analog video capture within the au0828 driver. + +config VIDEO_AU0828_RC + bool "AU0828 Remote Controller support" + depends on RC_CORE + depends on VIDEO_AU0828 + ---help--- + Enables Remote Controller support on au0828 driver. diff --git a/drivers/media/usb/au0828/Makefile b/drivers/media/usb/au0828/Makefile index be3bdf698022..3dc7539a5c4e 100644 --- a/drivers/media/usb/au0828/Makefile +++ b/drivers/media/usb/au0828/Makefile @@ -4,6 +4,10 @@ ifeq ($(CONFIG_VIDEO_AU0828_V4L2),y) au0828-objs += au0828-video.o au0828-vbi.o endif +ifeq ($(CONFIG_VIDEO_AU0828_RC),y) + au0828-objs += au0828-input.o +endif + obj-$(CONFIG_VIDEO_AU0828) += au0828.o ccflags-y += -Idrivers/media/tuners diff --git a/drivers/media/usb/au0828/au0828-cards.c b/drivers/media/usb/au0828/au0828-cards.c index 3a7924044a87..2c6b7da137ed 100644 --- a/drivers/media/usb/au0828/au0828-cards.c +++ b/drivers/media/usb/au0828/au0828-cards.c @@ -71,6 +71,7 @@ struct au0828_board au0828_boards[] = { .name = "Hauppauge HVR950Q", .tuner_type = TUNER_XC5000, .tuner_addr = 0x61, + .has_ir_i2c = 1, /* The au0828 hardware i2c implementation does not properly support the xc5000's i2c clock stretching. So we need to lower the clock frequency enough where the 15us clock diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c index ab45a6f9dcc9..56025e689442 100644 --- a/drivers/media/usb/au0828/au0828-core.c +++ b/drivers/media/usb/au0828/au0828-core.c @@ -32,10 +32,12 @@ * 2 = USB handling * 4 = I2C related * 8 = Bridge related + * 16 = IR related */ int au0828_debug; module_param_named(debug, au0828_debug, int, 0644); -MODULE_PARM_DESC(debug, "enable debug messages"); +MODULE_PARM_DESC(debug, + "set debug bitmask: 1=general, 2=USB, 4=I2C, 8=bridge, 16=IR"); static unsigned int disable_usb_speed_check; module_param(disable_usb_speed_check, int, 0444); @@ -151,6 +153,9 @@ static void au0828_usb_disconnect(struct usb_interface *interface) dprintk(1, "%s()\n", __func__); +#ifdef CONFIG_VIDEO_AU0828_RC + au0828_rc_unregister(dev); +#endif /* Digital TV */ au0828_dvb_unregister(dev); @@ -261,9 +266,15 @@ static int au0828_usb_probe(struct usb_interface *interface, pr_err("%s() au0282_dev_register failed\n", __func__); +#ifdef CONFIG_VIDEO_AU0828_RC + /* Remote controller */ + au0828_rc_register(dev); +#endif - /* Store the pointer to the au0828_dev so it can be accessed in - au0828_usb_disconnect */ + /* + * Store the pointer to the au0828_dev so it can be accessed in + * au0828_usb_disconnect + */ usb_set_intfdata(interface, dev); printk(KERN_INFO "Registered device AU0828 [%s]\n", @@ -279,6 +290,8 @@ static struct usb_driver au0828_usb_driver = { .probe = au0828_usb_probe, .disconnect = au0828_usb_disconnect, .id_table = au0828_usb_id_table, + + /* FIXME: Add suspend and resume functions */ }; static int __init au0828_init(void) @@ -298,6 +311,10 @@ static int __init au0828_init(void) printk(KERN_INFO "%s() Bridge Debugging is enabled\n", __func__); + if (au0828_debug & 16) + printk(KERN_INFO "%s() IR Debugging is enabled\n", + __func__); + printk(KERN_INFO "au0828 driver loaded\n"); ret = usb_register(&au0828_usb_driver); @@ -318,4 +335,4 @@ module_exit(au0828_exit); MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products"); MODULE_AUTHOR("Steven Toth "); MODULE_LICENSE("GPL"); -MODULE_VERSION("0.0.2"); +MODULE_VERSION("0.0.3"); diff --git a/drivers/media/usb/au0828/au0828-input.c b/drivers/media/usb/au0828/au0828-input.c new file mode 100644 index 000000000000..fd0d3a90ce7d --- /dev/null +++ b/drivers/media/usb/au0828/au0828-input.c @@ -0,0 +1,386 @@ +/* + handle au0828 IR remotes via linux kernel input layer. + + Copyright (C) 2014 Mauro Carvalho Chehab + Copyright (c) 2014 Samsung Electronics Co., Ltd. + + Based on em28xx-input.c. + + 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. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "au0828.h" + +struct au0828_rc { + struct au0828_dev *dev; + struct rc_dev *rc; + char name[32]; + char phys[32]; + + /* poll decoder */ + int polling; + struct delayed_work work; + + /* i2c slave address of external device (if used) */ + u16 i2c_dev_addr; + + int (*get_key_i2c)(struct au0828_rc *ir); +}; + +/* + * AU8522 has a builtin IR receiver. Add functions to get IR from it + */ + +static int au8522_rc_write(struct au0828_rc *ir, u16 reg, u8 data) +{ + int rc; + char buf[] = { (reg >> 8) | 0x80, reg & 0xff, data }; + struct i2c_msg msg = { .addr = ir->i2c_dev_addr, .flags = 0, + .buf = buf, .len = sizeof(buf) }; + + rc = i2c_transfer(ir->dev->i2c_client.adapter, &msg, 1); + + if (rc < 0) + return rc; + + return (rc == 1) ? 0 : -EIO; +} + +static int au8522_rc_read(struct au0828_rc *ir, u16 reg, int val, + char *buf, int size) +{ + int rc; + char obuf[3]; + struct i2c_msg msg[2] = { { .addr = ir->i2c_dev_addr, .flags = 0, + .buf = obuf, .len = 2 }, + { .addr = ir->i2c_dev_addr, .flags = I2C_M_RD, + .buf = buf, .len = size } }; + + obuf[0] = 0x40 | reg >> 8; + obuf[1] = reg & 0xff; + if (val >= 0) { + obuf[2] = val; + msg[0].len++; + } + + rc = i2c_transfer(ir->dev->i2c_client.adapter, msg, 2); + + if (rc < 0) + return rc; + + return (rc == 2) ? 0 : -EIO; +} + +static int au8522_rc_andor(struct au0828_rc *ir, u16 reg, u8 mask, u8 value) +{ + int rc; + char buf; + + rc = au8522_rc_read(ir, reg, -1, &buf, 1); + if (rc < 0) + return rc; + + buf = (buf & ~mask) | (value & mask); + + return au8522_rc_write(ir, reg, buf); +} + +#define au8522_rc_set(ir, reg, bit) au8522_rc_andor(ir, (reg), (bit), (bit)) +#define au8522_rc_clear(ir, reg, bit) au8522_rc_andor(ir, (reg), (bit), 0) + +/* Remote Controller time units */ + +#define AU8522_UNIT 200000 /* ns */ +#define NEC_START_SPACE (4500000 / AU8522_UNIT) +#define NEC_START_PULSE (562500 * 16) +#define RC5_START_SPACE (4 * AU8522_UNIT) +#define RC5_START_PULSE 888888 + +static int au0828_get_key_au8522(struct au0828_rc *ir) +{ + unsigned char buf[40]; + DEFINE_IR_RAW_EVENT(rawir); + int i, j, rc; + int prv_bit, bit, width; + bool first = true; + + /* Check IR int */ + rc = au8522_rc_read(ir, 0xe1, -1, buf, 1); + if (rc < 0 || !(buf[0] & (1 << 4))) + return 0; + + /* Something arrived. Get the data */ + rc = au8522_rc_read(ir, 0xe3, 0x11, buf, sizeof(buf)); + + + if (rc < 0) + return rc; + + /* Disable IR */ + au8522_rc_clear(ir, 0xe0, 1 << 4); + + usleep_range(45000, 46000); + + /* Enable IR */ + au8522_rc_set(ir, 0xe0, 1 << 4); + + dprintk(16, "RC data received: %*ph\n", 40, buf); + + prv_bit = (buf[0] >> 7) & 0x01; + width = 0; + for (i = 0; i < sizeof(buf); i++) { + for (j = 7; j >= 0; j--) { + bit = (buf[i] >> j) & 0x01; + if (bit == prv_bit) { + width++; + continue; + } + + /* + * Fix an au8522 bug: the first pulse event + * is lost. So, we need to fake it, based on the + * protocol. That means that not all raw decoders + * will work, as we need to add a hack for each + * protocol, based on the first space. + * So, we only support RC5 and NEC. + */ + + if (first) { + first = false; + + init_ir_raw_event(&rawir); + rawir.pulse = true; + if (width > NEC_START_SPACE - 2 && + width < NEC_START_SPACE + 2) { + /* NEC protocol */ + rawir.duration = NEC_START_PULSE; + dprintk(16, "Storing NEC start %s with duration %d", + rawir.pulse ? "pulse" : "space", + rawir.duration); + } else { + /* RC5 protocol */ + rawir.duration = RC5_START_PULSE; + dprintk(16, "Storing RC5 start %s with duration %d", + rawir.pulse ? "pulse" : "space", + rawir.duration); + } + ir_raw_event_store(ir->rc, &rawir); + } + + init_ir_raw_event(&rawir); + rawir.pulse = prv_bit ? false : true; + rawir.duration = AU8522_UNIT * width; + dprintk(16, "Storing %s with duration %d", + rawir.pulse ? "pulse" : "space", + rawir.duration); + ir_raw_event_store(ir->rc, &rawir); + + width = 1; + prv_bit = bit; + } + } + + init_ir_raw_event(&rawir); + rawir.pulse = prv_bit ? false : true; + rawir.duration = AU8522_UNIT * width; + dprintk(16, "Storing end %s with duration %d", + rawir.pulse ? "pulse" : "space", + rawir.duration); + ir_raw_event_store(ir->rc, &rawir); + + ir_raw_event_handle(ir->rc); + + return 1; +} + +/* + * Generic IR code + */ + +static void au0828_rc_work(struct work_struct *work) +{ + struct au0828_rc *ir = container_of(work, struct au0828_rc, work.work); + int rc; + + rc = ir->get_key_i2c(ir); + if (rc < 0) + pr_info("Error while getting RC scancode\n"); + + schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling)); +} + +static int au0828_rc_start(struct rc_dev *rc) +{ + struct au0828_rc *ir = rc->priv; + + INIT_DELAYED_WORK(&ir->work, au0828_rc_work); + + /* Enable IR */ + au8522_rc_set(ir, 0xe0, 1 << 4); + + schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling)); + + return 0; +} + +static void au0828_rc_stop(struct rc_dev *rc) +{ + struct au0828_rc *ir = rc->priv; + + /* Disable IR */ + au8522_rc_clear(ir, 0xe0, 1 << 4); + + cancel_delayed_work_sync(&ir->work); +} + +static int au0828_probe_i2c_ir(struct au0828_dev *dev) +{ + int i = 0; + const unsigned short addr_list[] = { + 0x47, I2C_CLIENT_END + }; + + while (addr_list[i] != I2C_CLIENT_END) { + if (i2c_probe_func_quick_read(dev->i2c_client.adapter, + addr_list[i]) == 1) + return addr_list[i]; + i++; + } + + return -ENODEV; +} + +int au0828_rc_register(struct au0828_dev *dev) +{ + struct au0828_rc *ir; + struct rc_dev *rc; + int err = -ENOMEM; + u16 i2c_rc_dev_addr = 0; + + if (!dev->board.has_ir_i2c) + return 0; + + i2c_rc_dev_addr = au0828_probe_i2c_ir(dev); + if (!i2c_rc_dev_addr) + return -ENODEV; + + ir = kzalloc(sizeof(*ir), GFP_KERNEL); + rc = rc_allocate_device(); + if (!ir || !rc) + goto error; + + /* record handles to ourself */ + ir->dev = dev; + dev->ir = ir; + ir->rc = rc; + + rc->priv = ir; + rc->open = au0828_rc_start; + rc->close = au0828_rc_stop; + + if (dev->board.has_ir_i2c) { /* external i2c device */ + switch (dev->boardnr) { + case AU0828_BOARD_HAUPPAUGE_HVR950Q: + rc->map_name = RC_MAP_HAUPPAUGE; + ir->get_key_i2c = au0828_get_key_au8522; + break; + default: + err = -ENODEV; + goto error; + } + + ir->i2c_dev_addr = i2c_rc_dev_addr; + } + + /* This is how often we ask the chip for IR information */ + ir->polling = 100; /* ms */ + + /* init input device */ + snprintf(ir->name, sizeof(ir->name), "au0828 IR (%s)", + dev->board.name); + + usb_make_path(dev->usbdev, ir->phys, sizeof(ir->phys)); + strlcat(ir->phys, "/input0", sizeof(ir->phys)); + + 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->usbdev->descriptor.idVendor); + rc->input_id.product = le16_to_cpu(dev->usbdev->descriptor.idProduct); + rc->dev.parent = &dev->usbdev->dev; + rc->driver_name = "au0828-input"; + rc->driver_type = RC_DRIVER_IR_RAW; + rc->allowed_protocols = RC_BIT_NEC | RC_BIT_RC5; + + /* all done */ + err = rc_register_device(rc); + if (err) + goto error; + + pr_info("Remote controller %s initalized\n", ir->name); + + return 0; + +error: + dev->ir = NULL; + rc_free_device(rc); + kfree(ir); + return err; +} + +void au0828_rc_unregister(struct au0828_dev *dev) +{ + struct au0828_rc *ir = dev->ir; + + /* skip detach on non attached boards */ + if (!ir) + return; + + if (ir->rc) + rc_unregister_device(ir->rc); + + /* done */ + kfree(ir); + dev->ir = NULL; +} + +int au0828_rc_suspend(struct au0828_dev *dev) +{ + struct au0828_rc *ir = dev->ir; + + if (!ir) + return 0; + + cancel_delayed_work_sync(&ir->work); + + return 0; +} + +int au0828_rc_resume(struct au0828_dev *dev) +{ + struct au0828_rc *ir = dev->ir; + + if (!ir) + return 0; + + schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling)); + + return 0; +} diff --git a/drivers/media/usb/au0828/au0828.h b/drivers/media/usb/au0828/au0828.h index 7112b9d956fa..96bec05d7dac 100644 --- a/drivers/media/usb/au0828/au0828.h +++ b/drivers/media/usb/au0828/au0828.h @@ -88,6 +88,7 @@ struct au0828_board { unsigned int tuner_type; unsigned char tuner_addr; unsigned char i2c_clk_divider; + unsigned char has_ir_i2c:1; struct au0828_input input[AU0828_MAX_INPUT]; }; @@ -213,6 +214,10 @@ struct au0828_dev { struct v4l2_device v4l2_dev; struct v4l2_ctrl_handler v4l2_ctrl_hdl; #endif +#ifdef CONFIG_VIDEO_AU0828_RC + struct au0828_rc *ir; +#endif + int users; unsigned int resources; /* resources in use */ struct video_device *vdev; @@ -319,3 +324,9 @@ extern struct videobuf_queue_ops au0828_vbi_qops; do { if (au0828_debug & level)\ printk(KERN_DEBUG DRIVER_NAME "/0: " fmt, ## arg);\ } while (0) + +/* au0828-input.c */ +int au0828_rc_register(struct au0828_dev *dev); +void au0828_rc_unregister(struct au0828_dev *dev); +int au0828_rc_suspend(struct au0828_dev *dev); +int au0828_rc_resume(struct au0828_dev *dev); -- 2.39.5