From 917167e9a34f7577086ccfcbf07f6fb96a209a31 Mon Sep 17 00:00:00 2001 From: Jarod Wilson Date: Mon, 18 Oct 2010 11:57:06 -0300 Subject: [PATCH] [media] lirc_igorplugusb: assorted fixups Tighten up error checking, rename some functions to less generic names, remove unnecessary cruft, add missing debug modparam wiring, and fix up some printk output. Signed-off-by: Jarod Wilson Signed-off-by: Mauro Carvalho Chehab --- drivers/staging/lirc/lirc_igorplugusb.c | 123 +++++++++++++----------- 1 file changed, 65 insertions(+), 58 deletions(-) diff --git a/drivers/staging/lirc/lirc_igorplugusb.c b/drivers/staging/lirc/lirc_igorplugusb.c index e680d889710..b9a4ffd9c7a 100644 --- a/drivers/staging/lirc/lirc_igorplugusb.c +++ b/drivers/staging/lirc/lirc_igorplugusb.c @@ -57,7 +57,7 @@ #define DRIVER_VERSION "0.1" #define DRIVER_AUTHOR \ "Jan M. Hochstein " -#define DRIVER_DESC "USB remote driver for LIRC" +#define DRIVER_DESC "Igorplug USB remote driver for LIRC" #define DRIVER_NAME "lirc_igorplugusb" /* debugging support */ @@ -201,7 +201,6 @@ struct igorplug { /* usb */ struct usb_device *usbdev; - struct urb *urb_in; int devnum; unsigned char *buf_in; @@ -216,28 +215,36 @@ struct igorplug { /* handle sending (init strings) */ int send_flags; - wait_queue_head_t wait_out; }; static int unregister_from_lirc(struct igorplug *ir) { - struct lirc_driver *d = ir->d; + struct lirc_driver *d; int devnum; - if (!ir->d) + if (!ir) { + printk(KERN_ERR "%s: called with NULL device struct!\n", + __func__); return -EINVAL; + } devnum = ir->devnum; - dprintk(DRIVER_NAME "[%d]: unregister from lirc called\n", devnum); + d = ir->d; - lirc_unregister_driver(d->minor); + if (!d) { + printk(KERN_ERR "%s: called with NULL lirc driver struct!\n", + __func__); + return -EINVAL; + } - printk(DRIVER_NAME "[%d]: usb remote disconnected\n", devnum); + dprintk(DRIVER_NAME "[%d]: calling lirc_unregister_driver\n", devnum); + lirc_unregister_driver(d->minor); kfree(d); ir->d = NULL; kfree(ir); - return 0; + + return devnum; } static int set_use_inc(void *data) @@ -248,6 +255,7 @@ static int set_use_inc(void *data) printk(DRIVER_NAME "[?]: set_use_inc called with no context\n"); return -EIO; } + dprintk(DRIVER_NAME "[%d]: set use inc\n", ir->devnum); if (!ir->usbdev) @@ -264,6 +272,7 @@ static void set_use_dec(void *data) printk(DRIVER_NAME "[?]: set_use_dec called with no context\n"); return; } + dprintk(DRIVER_NAME "[%d]: set use dec\n", ir->devnum); } @@ -274,22 +283,21 @@ static void set_use_dec(void *data) * -ENODATA if none was available. This should add some number of bits * evenly divisible by code_length to the buffer */ -static int usb_remote_poll(void *data, struct lirc_buffer *buf) +static int igorplugusb_remote_poll(void *data, struct lirc_buffer *buf) { int ret; struct igorplug *ir = (struct igorplug *)data; - if (!ir->usbdev) /* Has the device been removed? */ + if (!ir || !ir->usbdev) /* Has the device been removed? */ return -ENODEV; memset(ir->buf_in, 0, ir->len_in); - ret = usb_control_msg( - ir->usbdev, usb_rcvctrlpipe(ir->usbdev, 0), - GET_INFRACODE, USB_TYPE_VENDOR|USB_DIR_IN, - 0/* offset */, /*unused*/0, - ir->buf_in, ir->len_in, - /*timeout*/HZ * USB_CTRL_GET_TIMEOUT); + ret = usb_control_msg(ir->usbdev, usb_rcvctrlpipe(ir->usbdev, 0), + GET_INFRACODE, USB_TYPE_VENDOR | USB_DIR_IN, + 0/* offset */, /*unused*/0, + ir->buf_in, ir->len_in, + /*timeout*/HZ * USB_CTRL_GET_TIMEOUT); if (ret > 0) { int i = DEVICE_HEADERLEN; int code, timediff; @@ -358,12 +366,12 @@ static int usb_remote_poll(void *data, struct lirc_buffer *buf) -static int usb_remote_probe(struct usb_interface *intf, - const struct usb_device_id *id) +static int igorplugusb_remote_probe(struct usb_interface *intf, + const struct usb_device_id *id) { struct usb_device *dev = NULL; struct usb_host_interface *idesc = NULL; - struct usb_host_endpoint *ep_ctl2; + struct usb_endpoint_descriptor *ep; struct igorplug *ir = NULL; struct lirc_driver *driver = NULL; int devnum, pipe, maxp; @@ -380,20 +388,21 @@ static int usb_remote_probe(struct usb_interface *intf, if (idesc->desc.bNumEndpoints != 1) return -ENODEV; - ep_ctl2 = idesc->endpoint; - if (((ep_ctl2->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) + + ep = &idesc->endpoint->desc; + if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_IN) - || (ep_ctl2->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) + || (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_CONTROL) return -ENODEV; - pipe = usb_rcvctrlpipe(dev, ep_ctl2->desc.bEndpointAddress); + + pipe = usb_rcvctrlpipe(dev, ep->bEndpointAddress); devnum = dev->devnum; maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); dprintk(DRIVER_NAME "[%d]: bytes_in_key=%zu maxp=%d\n", devnum, CODE_LENGTH, maxp); - mem_failure = 0; ir = kzalloc(sizeof(struct igorplug), GFP_KERNEL); if (!ir) { @@ -406,9 +415,8 @@ static int usb_remote_probe(struct usb_interface *intf, goto mem_failure_switch; } - ir->buf_in = usb_alloc_coherent(dev, - DEVICE_BUFLEN+DEVICE_HEADERLEN, - GFP_ATOMIC, &ir->dma_in); + ir->buf_in = usb_alloc_coherent(dev, DEVICE_BUFLEN + DEVICE_HEADERLEN, + GFP_ATOMIC, &ir->dma_in); if (!ir->buf_in) { mem_failure = 3; goto mem_failure_switch; @@ -424,12 +432,10 @@ static int usb_remote_probe(struct usb_interface *intf, driver->set_use_inc = &set_use_inc; driver->set_use_dec = &set_use_dec; driver->sample_rate = sample_rate; /* per second */ - driver->add_to_buf = &usb_remote_poll; + driver->add_to_buf = &igorplugusb_remote_poll; driver->dev = &intf->dev; driver->owner = THIS_MODULE; - init_waitqueue_head(&ir->wait_out); - minor = lirc_register_driver(driver); if (minor < 0) mem_failure = 9; @@ -484,24 +490,28 @@ mem_failure_switch: } -static void usb_remote_disconnect(struct usb_interface *intf) +static void igorplugusb_remote_disconnect(struct usb_interface *intf) { - struct usb_device *dev = interface_to_usbdev(intf); + struct usb_device *usbdev = interface_to_usbdev(intf); struct igorplug *ir = usb_get_intfdata(intf); + struct device *dev = &intf->dev; + int devnum; + usb_set_intfdata(intf, NULL); if (!ir || !ir->d) return; ir->usbdev = NULL; - wake_up_all(&ir->wait_out); - usb_free_coherent(dev, ir->len_in, ir->buf_in, ir->dma_in); + usb_free_coherent(usbdev, ir->len_in, ir->buf_in, ir->dma_in); + + devnum = unregister_from_lirc(ir); - unregister_from_lirc(ir); + dev_info(dev, DRIVER_NAME "[%d]: %s done\n", devnum, __func__); } -static struct usb_device_id usb_remote_id_table[] = { +static struct usb_device_id igorplugusb_remote_id_table[] = { /* Igor Plug USB (Atmel's Manufact. ID) */ { USB_DEVICE(0x03eb, 0x0002) }, @@ -509,38 +519,33 @@ static struct usb_device_id usb_remote_id_table[] = { { } }; -static struct usb_driver usb_remote_driver = { +static struct usb_driver igorplugusb_remote_driver = { .name = DRIVER_NAME, - .probe = usb_remote_probe, - .disconnect = usb_remote_disconnect, - .id_table = usb_remote_id_table + .probe = igorplugusb_remote_probe, + .disconnect = igorplugusb_remote_disconnect, + .id_table = igorplugusb_remote_id_table }; -static int __init usb_remote_init(void) +static int __init igorplugusb_remote_init(void) { - int i; + int ret = 0; - printk(KERN_INFO "\n" - DRIVER_NAME ": " DRIVER_DESC " v" DRIVER_VERSION "\n"); - printk(DRIVER_NAME ": " DRIVER_AUTHOR "\n"); - dprintk(DRIVER_NAME ": debug mode enabled\n"); + dprintk(DRIVER_NAME ": loaded, debug mode enabled\n"); - i = usb_register(&usb_remote_driver); - if (i < 0) { - printk(DRIVER_NAME ": usb register failed, result = %d\n", i); - return -ENODEV; - } + ret = usb_register(&igorplugusb_remote_driver); + if (ret) + printk(KERN_ERR DRIVER_NAME ": usb register failed!\n"); - return 0; + return ret; } -static void __exit usb_remote_exit(void) +static void __exit igorplugusb_remote_exit(void) { - usb_deregister(&usb_remote_driver); + usb_deregister(&igorplugusb_remote_driver); } -module_init(usb_remote_init); -module_exit(usb_remote_exit); +module_init(igorplugusb_remote_init); +module_exit(igorplugusb_remote_exit); #include MODULE_INFO(vermagic, VERMAGIC_STRING); @@ -548,8 +553,10 @@ MODULE_INFO(vermagic, VERMAGIC_STRING); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_LICENSE("GPL"); -MODULE_DEVICE_TABLE(usb, usb_remote_id_table); +MODULE_DEVICE_TABLE(usb, igorplugusb_remote_id_table); module_param(sample_rate, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(sample_rate, "Sampling rate in Hz (default: 100)"); +module_param(debug, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(debug, "Debug enabled or not"); -- 2.39.5