From: H Hartley Sweeten Date: Wed, 30 Jan 2013 23:47:01 +0000 (-0700) Subject: staging: comedi: ni_daq_dio24: convert to auto attach X-Git-Tag: firefly_0821_release~3680^2~1080^2~174 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5a1daad46a99f1f33b2559ff87a0fb9b01a07c87;p=firefly-linux-kernel-4.4.55.git staging: comedi: ni_daq_dio24: convert to auto attach Convert this pcmcia driver to the comedi auto attach mechanism. This allows getting rid of the "hack" needed to pass the pcmcia_device pointer from the pcmcia_driver to the comedi_driver as well as the now unnecessary boardinfo. Check the call to subdev_8255_init() for success. That function does a kzalloc and could return -ENOMEM. Signed-off-by: H Hartley Sweeten Cc: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/ni_daq_dio24.c b/drivers/staging/comedi/drivers/ni_daq_dio24.c index 47268ddafbb1..e491375321fd 100644 --- a/drivers/staging/comedi/drivers/ni_daq_dio24.c +++ b/drivers/staging/comedi/drivers/ni_daq_dio24.c @@ -49,69 +49,35 @@ the PCMCIA interface. #include #include -static struct pcmcia_device *pcmcia_cur_dev; - -#define DIO24_SIZE 4 /* size of io region used by board */ - -enum dio24_bustype { pcmcia_bustype }; - -struct dio24_board_struct { - const char *name; - int device_id; /* device id for pcmcia board */ - enum dio24_bustype bustype; /* PCMCIA */ - int have_dio; /* have 8255 chip */ - /* function pointers so we can use inb/outb or readb/writeb as appropriate */ - unsigned int (*read_byte) (unsigned int address); - void (*write_byte) (unsigned int byte, unsigned int address); -}; +static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev, + void *priv_data) +{ + if (p_dev->config_index == 0) + return -EINVAL; -static const struct dio24_board_struct dio24_boards[] = { - { - .name = "daqcard-dio24", - .device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */ - .bustype = pcmcia_bustype, - .have_dio = 1, - }, - { - .name = "ni_daq_dio24", - .device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */ - .bustype = pcmcia_bustype, - .have_dio = 1, - }, -}; + return pcmcia_request_io(p_dev); +} -static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it) +static int dio24_auto_attach(struct comedi_device *dev, + unsigned long context) { - const struct dio24_board_struct *thisboard = comedi_board(dev); + struct pcmcia_device *link = comedi_to_pcmcia_dev(dev); struct comedi_subdevice *s; - unsigned long iobase = 0; - struct pcmcia_device *link; int ret; - /* get base address, irq etc. based on bustype */ - switch (thisboard->bustype) { - case pcmcia_bustype: - link = pcmcia_cur_dev; /* XXX hack */ - if (!link) - return -EIO; - iobase = link->resource[0]->start; - break; - default: - pr_err("bug! couldn't determine board type\n"); - return -EINVAL; - break; - } - pr_debug("comedi%d: ni_daq_dio24: %s, io 0x%lx", dev->minor, - thisboard->name, iobase); + dev->board_name = dev->driver->driver_name; - if (iobase == 0) { - pr_err("io base address is zero!\n"); - return -EINVAL; - } + link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_AUDIO | + CONF_AUTO_SET_IO; - dev->iobase = iobase; + ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, NULL); + if (ret) + return ret; - dev->board_name = thisboard->name; + ret = pcmcia_enable_device(link); + if (ret) + return ret; + dev->iobase = link->resource[0]->start; ret = comedi_alloc_subdevices(dev, 1); if (ret) @@ -119,72 +85,36 @@ static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it) /* 8255 dio */ s = &dev->subdevices[0]; - subdev_8255_init(dev, s, NULL, dev->iobase); + ret = subdev_8255_init(dev, s, NULL, dev->iobase); + if (ret) + return ret; return 0; -}; +} static void dio24_detach(struct comedi_device *dev) { + struct pcmcia_device *link = comedi_to_pcmcia_dev(dev); + if (dev->subdevices) subdev_8255_cleanup(dev, &dev->subdevices[0]); + if (dev->iobase) + pcmcia_disable_device(link); } static struct comedi_driver driver_dio24 = { .driver_name = "ni_daq_dio24", .module = THIS_MODULE, - .attach = dio24_attach, + .auto_attach = dio24_auto_attach, .detach = dio24_detach, - .num_names = ARRAY_SIZE(dio24_boards), - .board_name = &dio24_boards[0].name, - .offset = sizeof(struct dio24_board_struct), }; -static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev, - void *priv_data) -{ - if (p_dev->config_index == 0) - return -EINVAL; - - return pcmcia_request_io(p_dev); -} - static int dio24_cs_attach(struct pcmcia_device *link) { - int ret; - - link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_AUDIO | - CONF_AUTO_SET_IO; - - ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, NULL); - if (ret) { - dev_warn(&link->dev, "no configuration found\n"); - goto failed; - } - - if (!link->irq) - goto failed; - - ret = pcmcia_enable_device(link); - if (ret) - goto failed; - - pcmcia_cur_dev = link; - - return 0; - -failed: - pcmcia_disable_device(link); - return ret; -} - -static void dio24_cs_detach(struct pcmcia_device *link) -{ - pcmcia_disable_device(link); + return comedi_pcmcia_auto_config(link, &driver_dio24); } static const struct pcmcia_device_id dio24_cs_ids[] = { - /* N.B. These IDs should match those in dio24_boards */ PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c), /* daqcard-dio24 */ PCMCIA_DEVICE_NULL }; @@ -195,7 +125,7 @@ static struct pcmcia_driver dio24_cs_driver = { .owner = THIS_MODULE, .id_table = dio24_cs_ids, .probe = dio24_cs_attach, - .remove = dio24_cs_detach, + .remove = comedi_pcmcia_auto_unconfig, }; module_comedi_pcmcia_driver(driver_dio24, dio24_cs_driver);