@@ -80,7 +80,7 @@ static int dev_8255_attach(struct comedi_device *dev,
if (ret) {
s->type = COMEDI_SUBD_UNUSED;
} else {
- ret = subdev_8255_init(dev, s, NULL, iobase);
+ ret = subdev_8255_io_init(dev, s, iobase);
if (ret) {
/*
* Release the I/O port region here, as the
@@ -242,9 +242,9 @@ static int pci_8255_auto_attach(struct comedi_device *dev,
for (i = 0; i < board->n_8255; i++) {
s = &dev->subdevices[i];
if (dev->mmio)
- ret = subdev_8255_mm_init(dev, s, NULL, i * I8255_SIZE);
+ ret = subdev_8255_mm_init(dev, s, i * I8255_SIZE);
else
- ret = subdev_8255_init(dev, s, NULL, i * I8255_SIZE);
+ ret = subdev_8255_io_init(dev, s, i * I8255_SIZE);
if (ret)
return ret;
}
@@ -642,8 +642,8 @@ static int pci_dio_auto_attach(struct comedi_device *dev,
for (j = 0; j < d->chans; j++) {
s = &dev->subdevices[subdev++];
- ret = subdev_8255_init(dev, s, NULL,
- d->addr + j * I8255_SIZE);
+ ret = subdev_8255_io_init(dev, s,
+ d->addr + j * I8255_SIZE);
if (ret)
return ret;
}
@@ -247,7 +247,7 @@ static int aio_aio12_8_attach(struct comedi_device *dev,
/* Digital I/O subdevice (8255) */
s = &dev->subdevices[2];
- ret = subdev_8255_init(dev, s, NULL, AIO12_8_8255_BASE_REG);
+ ret = subdev_8255_io_init(dev, s, AIO12_8_8255_BASE_REG);
if (ret)
return ret;
@@ -147,7 +147,7 @@ int amplc_pc236_common_attach(struct comedi_device *dev, unsigned long iobase,
s = &dev->subdevices[0];
/* digital i/o subdevice (8255) */
- ret = subdev_8255_init(dev, s, NULL, 0x00);
+ ret = subdev_8255_io_init(dev, s, 0x00);
if (ret)
return ret;
@@ -2529,7 +2529,7 @@ static int pci230_auto_attach(struct comedi_device *dev,
s = &dev->subdevices[2];
/* digital i/o subdevice */
if (board->have_dio) {
- rc = subdev_8255_init(dev, s, NULL, PCI230_PPI_X_BASE);
+ rc = subdev_8255_io_init(dev, s, PCI230_PPI_X_BASE);
if (rc)
return rc;
} else {
@@ -1352,7 +1352,7 @@ static int cb_pcidas_auto_attach(struct comedi_device *dev,
/* 8255 */
s = &dev->subdevices[2];
- ret = subdev_8255_init(dev, s, NULL, PCIDAS_8255_BASE);
+ ret = subdev_8255_io_init(dev, s, PCIDAS_8255_BASE);
if (ret)
return ret;
@@ -3877,11 +3877,10 @@ static int setup_subdevices(struct comedi_device *dev)
s = &dev->subdevices[4];
if (board->has_8255) {
if (board->layout == LAYOUT_4020) {
- ret = subdev_8255_init(dev, s, dio_callback_4020,
- I8255_4020_REG);
+ ret = subdev_8255_cb_init(dev, s, dio_callback_4020,
+ I8255_4020_REG);
} else {
- ret = subdev_8255_mm_init(dev, s, NULL,
- DIO_8255_OFFSET);
+ ret = subdev_8255_mm_init(dev, s, DIO_8255_OFFSET);
}
if (ret)
return ret;
@@ -365,7 +365,7 @@ static int cb_pcidda_auto_attach(struct comedi_device *dev,
/* two 8255 digital io subdevices */
for (i = 0; i < 2; i++) {
s = &dev->subdevices[1 + i];
- ret = subdev_8255_init(dev, s, NULL, i * I8255_SIZE);
+ ret = subdev_8255_io_init(dev, s, i * I8255_SIZE);
if (ret)
return ret;
}
@@ -405,7 +405,7 @@ static int cb_pcimdas_auto_attach(struct comedi_device *dev,
/* Digital I/O subdevice */
s = &dev->subdevices[2];
- ret = subdev_8255_init(dev, s, NULL, PCIMDAS_8255_BASE);
+ ret = subdev_8255_io_init(dev, s, PCIMDAS_8255_BASE);
if (ret)
return ret;
@@ -154,7 +154,7 @@ static int cb_pcimdda_auto_attach(struct comedi_device *dev,
s = &dev->subdevices[1];
/* digital i/o subdevice */
- return subdev_8255_init(dev, s, NULL, PCIMDDA_8255_BASE_REG);
+ return subdev_8255_io_init(dev, s, PCIMDDA_8255_BASE_REG);
}
static struct comedi_driver cb_pcimdda_driver = {
@@ -33,9 +33,9 @@
#include <linux/comedi/comedi_8255.h>
struct subdev_8255_private {
- unsigned long regbase;
+ unsigned long context;
int (*io)(struct comedi_device *dev, int dir, int port, int data,
- unsigned long regbase);
+ unsigned long context);
};
static int subdev_8255_io(struct comedi_device *dev,
@@ -64,7 +64,7 @@ static int subdev_8255_insn(struct comedi_device *dev,
unsigned int *data)
{
struct subdev_8255_private *spriv = s->private;
- unsigned long regbase = spriv->regbase;
+ unsigned long context = spriv->context;
unsigned int mask;
unsigned int v;
@@ -72,18 +72,18 @@ static int subdev_8255_insn(struct comedi_device *dev,
if (mask) {
if (mask & 0xff)
spriv->io(dev, 1, I8255_DATA_A_REG,
- s->state & 0xff, regbase);
+ s->state & 0xff, context);
if (mask & 0xff00)
spriv->io(dev, 1, I8255_DATA_B_REG,
- (s->state >> 8) & 0xff, regbase);
+ (s->state >> 8) & 0xff, context);
if (mask & 0xff0000)
spriv->io(dev, 1, I8255_DATA_C_REG,
- (s->state >> 16) & 0xff, regbase);
+ (s->state >> 16) & 0xff, context);
}
- v = spriv->io(dev, 0, I8255_DATA_A_REG, 0, regbase);
- v |= (spriv->io(dev, 0, I8255_DATA_B_REG, 0, regbase) << 8);
- v |= (spriv->io(dev, 0, I8255_DATA_C_REG, 0, regbase) << 16);
+ v = spriv->io(dev, 0, I8255_DATA_A_REG, 0, context);
+ v |= (spriv->io(dev, 0, I8255_DATA_B_REG, 0, context) << 8);
+ v |= (spriv->io(dev, 0, I8255_DATA_C_REG, 0, context) << 16);
data[1] = v;
@@ -94,7 +94,7 @@ static void subdev_8255_do_config(struct comedi_device *dev,
struct comedi_subdevice *s)
{
struct subdev_8255_private *spriv = s->private;
- unsigned long regbase = spriv->regbase;
+ unsigned long context = spriv->context;
int config;
config = I8255_CTRL_CW;
@@ -108,7 +108,7 @@ static void subdev_8255_do_config(struct comedi_device *dev,
if (!(s->io_bits & 0xf00000))
config |= I8255_CTRL_C_HI_IO;
- spriv->io(dev, 1, I8255_CTRL_REG, config, regbase);
+ spriv->io(dev, 1, I8255_CTRL_REG, config, context);
}
static int subdev_8255_insn_config(struct comedi_device *dev,
@@ -142,23 +142,19 @@ static int __subdev_8255_init(struct comedi_device *dev,
struct comedi_subdevice *s,
int (*io)(struct comedi_device *dev,
int dir, int port, int data,
- unsigned long regbase),
- unsigned long regbase,
- bool is_mmio)
+ unsigned long context),
+ unsigned long context)
{
struct subdev_8255_private *spriv;
+ if (!io)
+ return -EINVAL;
+
spriv = comedi_alloc_spriv(s, sizeof(*spriv));
if (!spriv)
return -ENOMEM;
- if (io)
- spriv->io = io;
- else if (is_mmio)
- spriv->io = subdev_8255_mmio;
- else
- spriv->io = subdev_8255_io;
- spriv->regbase = regbase;
+ spriv->context = context;
s->type = COMEDI_SUBD_DIO;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
@@ -174,88 +170,83 @@ static int __subdev_8255_init(struct comedi_device *dev,
}
/**
- * subdev_8255_init - initialize DIO subdevice for driving I/O mapped 8255
+ * subdev_8255_io_init - initialize DIO subdevice for driving I/O mapped 8255
* @dev: comedi device owning subdevice
* @s: comedi subdevice to initialize
- * @io: (optional) register I/O call-back function
- * @regbase: offset of 8255 registers from dev->iobase, or call-back context
+ * @regbase: offset of 8255 registers from dev->iobase
*
* Initializes a comedi subdevice as a DIO subdevice driving an 8255 chip.
*
- * If the optional I/O call-back function is provided, its prototype is of
- * the following form:
- *
- * int my_8255_callback(struct comedi_device *dev, int dir, int port,
- * int data, unsigned long regbase);
- *
- * where 'dev', and 'regbase' match the values passed to this function,
- * 'port' is the 8255 port number 0 to 3 (including the control port), 'dir'
- * is the direction (0 for read, 1 for write) and 'data' is the value to be
- * written. It should return 0 if writing or the value read if reading.
- *
- * If the optional I/O call-back function is not provided, an internal
- * call-back function is used which uses consecutive I/O port addresses
- * starting at dev->iobase + regbase.
- *
* Return: -ENOMEM if failed to allocate memory, zero on success.
*/
-int subdev_8255_init(struct comedi_device *dev, struct comedi_subdevice *s,
- int (*io)(struct comedi_device *dev, int dir, int port,
- int data, unsigned long regbase),
+int subdev_8255_io_init(struct comedi_device *dev, struct comedi_subdevice *s,
unsigned long regbase)
{
- return __subdev_8255_init(dev, s, io, regbase, false);
+ return __subdev_8255_init(dev, s, subdev_8255_io, regbase);
}
-EXPORT_SYMBOL_GPL(subdev_8255_init);
+EXPORT_SYMBOL_GPL(subdev_8255_io_init);
/**
* subdev_8255_mm_init - initialize DIO subdevice for driving mmio-mapped 8255
* @dev: comedi device owning subdevice
* @s: comedi subdevice to initialize
- * @io: (optional) register I/O call-back function
- * @regbase: offset of 8255 registers from dev->mmio, or call-back context
+ * @regbase: offset of 8255 registers from dev->mmio
*
* Initializes a comedi subdevice as a DIO subdevice driving an 8255 chip.
*
- * If the optional I/O call-back function is provided, its prototype is of
- * the following form:
+ * Return: -ENOMEM if failed to allocate memory, zero on success.
+ */
+int subdev_8255_mm_init(struct comedi_device *dev, struct comedi_subdevice *s,
+ unsigned long regbase)
+{
+ return __subdev_8255_init(dev, s, subdev_8255_mmio, regbase);
+}
+EXPORT_SYMBOL_GPL(subdev_8255_mm_init);
+
+/**
+ * subdev_8255_cb_init - initialize DIO subdevice for driving callback-mapped 8255
+ * @dev: comedi device owning subdevice
+ * @s: comedi subdevice to initialize
+ * @io: register I/O call-back function
+ * @context: call-back context
+ *
+ * Initializes a comedi subdevice as a DIO subdevice driving an 8255 chip.
+ *
+ * The prototype of the I/O call-back function is of the following form:
*
* int my_8255_callback(struct comedi_device *dev, int dir, int port,
- * int data, unsigned long regbase);
+ * int data, unsigned long context);
*
- * where 'dev', and 'regbase' match the values passed to this function,
+ * where 'dev', and 'context' match the values passed to this function,
* 'port' is the 8255 port number 0 to 3 (including the control port), 'dir'
* is the direction (0 for read, 1 for write) and 'data' is the value to be
* written. It should return 0 if writing or the value read if reading.
*
- * If the optional I/O call-back function is not provided, an internal
- * call-back function is used which uses consecutive MMIO virtual addresses
- * starting at dev->mmio + regbase.
*
* Return: -ENOMEM if failed to allocate memory, zero on success.
*/
-int subdev_8255_mm_init(struct comedi_device *dev, struct comedi_subdevice *s,
+int subdev_8255_cb_init(struct comedi_device *dev, struct comedi_subdevice *s,
int (*io)(struct comedi_device *dev, int dir, int port,
- int data, unsigned long regbase),
- unsigned long regbase)
+ int data, unsigned long context),
+ unsigned long context)
{
- return __subdev_8255_init(dev, s, io, regbase, true);
+ return __subdev_8255_init(dev, s, io, context);
}
-EXPORT_SYMBOL_GPL(subdev_8255_mm_init);
+EXPORT_SYMBOL_GPL(subdev_8255_cb_init);
/**
* subdev_8255_regbase - get offset of 8255 registers or call-back context
* @s: comedi subdevice
*
- * Returns the 'regbase' parameter that was previously passed to
- * subdev_8255_init() or subdev_8255_mm_init() to set up the subdevice.
- * Only valid if the subdevice was set up successfully.
+ * Returns the 'regbase' or 'context' parameter that was previously passed to
+ * subdev_8255_io_init(), subdev_8255_mm_init(), or subdev_8255_cb_init() to
+ * set up the subdevice. Only valid if the subdevice was set up successfully.
*/
unsigned long subdev_8255_regbase(struct comedi_subdevice *s)
{
struct subdev_8255_private *spriv = s->private;
- return spriv->regbase;
+ return spriv->context;
}
EXPORT_SYMBOL_GPL(subdev_8255_regbase);
@@ -738,8 +738,8 @@ static int db2k_auto_attach(struct comedi_device *dev, unsigned long context)
return result;
s = &dev->subdevices[2];
- return subdev_8255_init(dev, s, db2k_8255_cb,
- DB2K_REG_DIO_P2_EXP_IO_8_BIT);
+ return subdev_8255_cb_init(dev, s, db2k_8255_cb,
+ DB2K_REG_DIO_P2_EXP_IO_8_BIT);
}
static void db2k_detach(struct comedi_device *dev)
@@ -429,7 +429,7 @@ int das08_common_attach(struct comedi_device *dev, unsigned long iobase)
s = &dev->subdevices[4];
/* 8255 */
if (board->i8255_offset != 0) {
- ret = subdev_8255_init(dev, s, NULL, board->i8255_offset);
+ ret = subdev_8255_io_init(dev, s, board->i8255_offset);
if (ret)
return ret;
} else {
@@ -1145,7 +1145,7 @@ static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
/* 8255 Digital I/O subdevice */
if (board->has_8255) {
s = &dev->subdevices[4];
- ret = subdev_8255_init(dev, s, NULL, board->i8255_offset);
+ ret = subdev_8255_io_init(dev, s, board->i8255_offset);
if (ret)
return ret;
}
@@ -583,7 +583,7 @@ static int das16m1_attach(struct comedi_device *dev,
/* Digital I/O subdevice (8255) */
s = &dev->subdevices[3];
- ret = subdev_8255_init(dev, s, NULL, DAS16M1_8255_IOBASE);
+ ret = subdev_8255_io_init(dev, s, DAS16M1_8255_IOBASE);
if (ret)
return ret;
@@ -599,7 +599,8 @@ static int dmm32at_attach(struct comedi_device *dev,
/* Digital I/O subdevice */
s = &dev->subdevices[2];
- return subdev_8255_init(dev, s, dmm32at_8255_io, DMM32AT_8255_IOBASE);
+ return subdev_8255_cb_init(dev, s, dmm32at_8255_io,
+ DMM32AT_8255_IOBASE);
}
static struct comedi_driver dmm32at_driver = {
@@ -677,7 +677,7 @@ static int atmio16d_attach(struct comedi_device *dev,
/* 8255 subdevice */
s = &dev->subdevices[3];
if (board->has_8255) {
- ret = subdev_8255_init(dev, s, NULL, 0x00);
+ ret = subdev_8255_io_init(dev, s, 0x00);
if (ret)
return ret;
} else {
@@ -45,7 +45,7 @@ static int dio24_auto_attach(struct comedi_device *dev,
/* 8255 dio */
s = &dev->subdevices[0];
- return subdev_8255_init(dev, s, NULL, 0x00);
+ return subdev_8255_io_init(dev, s, 0x00);
}
static struct comedi_driver driver_dio24 = {
@@ -1287,9 +1287,9 @@ int labpc_common_attach(struct comedi_device *dev,
/* 8255 dio */
s = &dev->subdevices[2];
if (dev->mmio)
- ret = subdev_8255_mm_init(dev, s, NULL, DIO_BASE_REG);
+ ret = subdev_8255_mm_init(dev, s, DIO_BASE_REG);
else
- ret = subdev_8255_init(dev, s, NULL, DIO_BASE_REG);
+ ret = subdev_8255_io_init(dev, s, DIO_BASE_REG);
if (ret)
return ret;
@@ -6137,8 +6137,8 @@ static int ni_E_init(struct comedi_device *dev,
/* 8255 device */
s = &dev->subdevices[NI_8255_DIO_SUBDEV];
if (board->has_8255) {
- ret = subdev_8255_init(dev, s, ni_8255_callback,
- NI_E_8255_BASE);
+ ret = subdev_8255_cb_init(dev, s, ni_8255_callback,
+ NI_E_8255_BASE);
if (ret)
return ret;
} else {
@@ -124,10 +124,10 @@ static int pcl724_attach(struct comedi_device *dev,
s = &dev->subdevices[i];
if (board->is_pet48) {
iobase = dev->iobase + (i * 0x1000);
- ret = subdev_8255_init(dev, s, pcl724_8255mapped_io,
- iobase);
+ ret = subdev_8255_cb_init(dev, s, pcl724_8255mapped_io,
+ iobase);
} else {
- ret = subdev_8255_init(dev, s, NULL, i * I8255_SIZE);
+ ret = subdev_8255_io_init(dev, s, i * I8255_SIZE);
}
if (ret)
return ret;
@@ -204,7 +204,7 @@ static int pcm3724_attach(struct comedi_device *dev,
for (i = 0; i < dev->n_subdevices; i++) {
s = &dev->subdevices[i];
- ret = subdev_8255_init(dev, s, NULL, i * I8255_SIZE);
+ ret = subdev_8255_io_init(dev, s, i * I8255_SIZE);
if (ret)
return ret;
s->insn_config = subdev_3724_insn_config;
@@ -27,16 +27,17 @@
struct comedi_device;
struct comedi_subdevice;
-int subdev_8255_init(struct comedi_device *dev, struct comedi_subdevice *s,
- int (*io)(struct comedi_device *dev, int dir, int port,
- int data, unsigned long regbase),
- unsigned long regbase);
+int subdev_8255_io_init(struct comedi_device *dev, struct comedi_subdevice *s,
+ unsigned long regbase);
int subdev_8255_mm_init(struct comedi_device *dev, struct comedi_subdevice *s,
- int (*io)(struct comedi_device *dev, int dir, int port,
- int data, unsigned long regbase),
unsigned long regbase);
+int subdev_8255_cb_init(struct comedi_device *dev, struct comedi_subdevice *s,
+ int (*io)(struct comedi_device *dev, int dir, int port,
+ int data, unsigned long context),
+ unsigned long context);
+
unsigned long subdev_8255_regbase(struct comedi_subdevice *s);
#endif