staging: comedi: ni_daq_700: 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.

We can also get rid of the boardinfo since it was only used to
provide the "name" that was used with the manual attach.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 33 insertions, 74 deletions

diff --git a/drivers/staging/comedi/drivers/ni_daq_700.c b/drivers/staging/comedi/drivers/ni_daq_700.c
index ff0e1993f173..e537b8f05903 100644
--- a/drivers/staging/comedi/drivers/ni_daq_700.c
+++ b/drivers/staging/comedi/drivers/ni_daq_700.c
@@ -50,22 +50,15 @@ Manuals:	Register level:	http://www.ni.com/pdf/manuals/340698.pdf
                 User Manual:    http://www.ni.com/pdf/manuals/320676d.pdf
 */
 
+#include <linux/ioport.h>
 #include <linux/interrupt.h>
 #include <linux/slab.h>
-#include "../comedidev.h"
 
-#include <linux/ioport.h>
+#include "../comedidev.h"
 
 #include <pcmcia/cistpl.h>
-#include <pcmcia/cisreg.h>
 #include <pcmcia/ds.h>
 
-static struct pcmcia_device *pcmcia_cur_dev;
-
-struct daq700_board {
-        const char *name;
-};
-
 /* daqcard700 registers */
 #define DIO_W           0x04    /* WO 8bit */
 #define DIO_R           0x05    /* RO 8bit */
@@ -202,24 +195,35 @@ static void daq700_ai_config(struct comedi_device *dev,
         inw(iobase + ADFIFO_R);         /* read 16bit junk from FIFO to clear */
 }
 
-static int daq700_attach(struct comedi_device *dev, struct comedi_devconfig *it)
+static int daq700_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 daq700_auto_attach(struct comedi_device *dev,
+                              unsigned long context)
 {
-        const struct daq700_board *thisboard = comedi_board(dev);
+        struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
         struct comedi_subdevice *s;
-        struct pcmcia_device *link;
         int ret;
 
-        link = pcmcia_cur_dev;  /* XXX hack */
-        if (!link)
-                return -EIO;
+        dev->board_name = dev->driver->driver_name;
 
-        dev->iobase = link->resource[0]->start;
-        if (!dev->iobase) {
-                dev_err(dev->class_dev, "io base address is zero!\n");
-                return -EINVAL;
-        }
+        link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_AUDIO |
+                              CONF_AUTO_SET_IO;
+
+        ret = pcmcia_loop_config(link, daq700_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, 2);
         if (ret)
@@ -258,66 +262,22 @@ static int daq700_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 
 static void daq700_detach(struct comedi_device *dev)
 {
-        /* nothing to cleanup */
-}
+        struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
 
-static const struct daq700_board daq700_boards[] = {
-        {
-                .name           = "daqcard-700",
-        }, {
-                .name           = "ni_daq_700",
-        },
-};
+        if (dev->iobase)
+                pcmcia_disable_device(link);
+}
 
 static struct comedi_driver daq700_driver = {
         .driver_name    = "ni_daq_700",
         .module         = THIS_MODULE,
-        .attach         = daq700_attach,
+        .auto_attach    = daq700_auto_attach,
         .detach         = daq700_detach,
-        .board_name     = &daq700_boards[0].name,
-        .num_names      = ARRAY_SIZE(daq700_boards),
-        .offset         = sizeof(struct daq700_board),
 };
 
-static int daq700_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 daq700_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, daq700_pcmcia_config_loop, NULL);
-        if (ret)
-                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 daq700_cs_detach(struct pcmcia_device *link)
-{
-        pcmcia_disable_device(link);
-        pcmcia_cur_dev = NULL;
+        return comedi_pcmcia_auto_config(link, &daq700_driver);
 }
 
 static const struct pcmcia_device_id daq700_cs_ids[] = {
@@ -329,11 +289,10 @@ MODULE_DEVICE_TABLE(pcmcia, daq700_cs_ids);
 static struct pcmcia_driver daq700_cs_driver = {
         .name           = "ni_daq_700",
         .owner          = THIS_MODULE,
-        .probe          = daq700_cs_attach,
-        .remove         = daq700_cs_detach,
         .id_table       = daq700_cs_ids,
+        .probe          = daq700_cs_attach,
+        .remove         = comedi_pcmcia_auto_unconfig,
 };
-
 module_comedi_pcmcia_driver(daq700_driver, daq700_cs_driver);
 
 MODULE_AUTHOR("Fred Brooks <nsaspook@nsaspook.com>");