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Subject[PATCH v2 1/2] counter: 104-quad-8: Remove IIO counter ABI
Date
The IIO counter driver has been superseded by the Counter subsystem as
discussed in [1]. This patch removes the IIO counter ABI from the
104-QUAD-8 driver.

[1] https://lore.kernel.org/lkml/20210119104105.000010df@Huawei.com/

Cc: Syed Nayyar Waris <syednwaris@gmail.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
---
.../testing/sysfs-bus-iio-counter-104-quad-8 | 133 ----
MAINTAINERS | 1 -
drivers/counter/104-quad-8.c | 653 ++----------------
drivers/counter/Kconfig | 2 +-
4 files changed, 65 insertions(+), 724 deletions(-)
delete mode 100644 Documentation/ABI/testing/sysfs-bus-iio-counter-104-quad-8

diff --git a/Documentation/ABI/testing/sysfs-bus-iio-counter-104-quad-8 b/Documentation/ABI/testing/sysfs-bus-iio-counter-104-quad-8
deleted file mode 100644
index bac3d0d48b7b..000000000000
--- a/Documentation/ABI/testing/sysfs-bus-iio-counter-104-quad-8
+++ /dev/null
@@ -1,133 +0,0 @@
-What: /sys/bus/iio/devices/iio:deviceX/in_count_count_mode_available
-What: /sys/bus/iio/devices/iio:deviceX/in_count_noise_error_available
-What: /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available
-What: /sys/bus/iio/devices/iio:deviceX/in_index_index_polarity_available
-What: /sys/bus/iio/devices/iio:deviceX/in_index_synchronous_mode_available
-KernelVersion: 4.10
-Contact: linux-iio@vger.kernel.org
-Description:
- This interface is deprecated; please use the Counter subsystem.
-
- Discrete set of available values for the respective counter
- configuration are listed in this file.
-
-What: /sys/bus/iio/devices/iio:deviceX/in_countY_count_mode
-KernelVersion: 4.10
-Contact: linux-iio@vger.kernel.org
-Description:
- This interface is deprecated; please use the Counter subsystem.
-
- Count mode for channel Y. Four count modes are available:
- normal, range limit, non-recycle, and modulo-n. The preset value
- for channel Y is used by the count mode where required.
-
- Normal:
- Counting is continuous in either direction.
-
- Range Limit:
- An upper or lower limit is set, mimicking limit switches
- in the mechanical counterpart. The upper limit is set to
- the preset value, while the lower limit is set to 0. The
- counter freezes at count = preset when counting up, and
- at count = 0 when counting down. At either of these
- limits, the counting is resumed only when the count
- direction is reversed.
-
- Non-recycle:
- Counter is disabled whenever a 24-bit count overflow or
- underflow takes place. The counter is re-enabled when a
- new count value is loaded to the counter via a preset
- operation or write to raw.
-
- Modulo-N:
- A count boundary is set between 0 and the preset value.
- The counter is reset to 0 at count = preset when
- counting up, while the counter is set to the preset
- value at count = 0 when counting down; the counter does
- not freeze at the bundary points, but counts
- continuously throughout.
-
-What: /sys/bus/iio/devices/iio:deviceX/in_countY_noise_error
-KernelVersion: 4.10
-Contact: linux-iio@vger.kernel.org
-Description:
- This interface is deprecated; please use the Counter subsystem.
-
- Read-only attribute that indicates whether excessive noise is
- present at the channel Y count inputs in quadrature clock mode;
- irrelevant in non-quadrature clock mode.
-
-What: /sys/bus/iio/devices/iio:deviceX/in_countY_preset
-KernelVersion: 4.10
-Contact: linux-iio@vger.kernel.org
-Description:
- This interface is deprecated; please use the Counter subsystem.
-
- If the counter device supports preset registers, the preset
- count for channel Y is provided by this attribute.
-
-What: /sys/bus/iio/devices/iio:deviceX/in_countY_quadrature_mode
-KernelVersion: 4.10
-Contact: linux-iio@vger.kernel.org
-Description:
- This interface is deprecated; please use the Counter subsystem.
-
- Configure channel Y counter for non-quadrature or quadrature
- clock mode. Selecting non-quadrature clock mode will disable
- synchronous load mode. In quadrature clock mode, the channel Y
- scale attribute selects the encoder phase division (scale of 1
- selects full-cycle, scale of 0.5 selects half-cycle, scale of
- 0.25 selects quarter-cycle) processed by the channel Y counter.
-
- Non-quadrature:
- The filter and decoder circuit are bypassed. Encoder A
- input serves as the count input and B as the UP/DOWN
- direction control input, with B = 1 selecting UP Count
- mode and B = 0 selecting Down Count mode.
-
- Quadrature:
- Encoder A and B inputs are digitally filtered and
- decoded for UP/DN clock.
-
-What: /sys/bus/iio/devices/iio:deviceX/in_countY_set_to_preset_on_index
-KernelVersion: 4.10
-Contact: linux-iio@vger.kernel.org
-Description:
- This interface is deprecated; please use the Counter subsystem.
-
- Whether to set channel Y counter with channel Y preset value
- when channel Y index input is active, or continuously count.
- Valid attribute values are boolean.
-
-What: /sys/bus/iio/devices/iio:deviceX/in_indexY_index_polarity
-KernelVersion: 4.10
-Contact: linux-iio@vger.kernel.org
-Description:
- This interface is deprecated; please use the Counter subsystem.
-
- Active level of channel Y index input; irrelevant in
- non-synchronous load mode.
-
-What: /sys/bus/iio/devices/iio:deviceX/in_indexY_synchronous_mode
-KernelVersion: 4.10
-Contact: linux-iio@vger.kernel.org
-Description:
- This interface is deprecated; please use the Counter subsystem.
-
- Configure channel Y counter for non-synchronous or synchronous
- load mode. Synchronous load mode cannot be selected in
- non-quadrature clock mode.
-
- Non-synchronous:
- A logic low level is the active level at this index
- input. The index function (as enabled via
- set_to_preset_on_index) is performed directly on the
- active level of the index input.
-
- Synchronous:
- Intended for interfacing with encoder Index output in
- quadrature clock mode. The active level is configured
- via index_polarity. The index function (as enabled via
- set_to_preset_on_index) is performed synchronously with
- the quadrature clock on the active level of the index
- input.
diff --git a/MAINTAINERS b/MAINTAINERS
index 546aa66428c9..f2d94e1f4032 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -298,7 +298,6 @@ M: Syed Nayyar Waris <syednwaris@gmail.com>
L: linux-iio@vger.kernel.org
S: Maintained
F: Documentation/ABI/testing/sysfs-bus-counter-104-quad-8
-F: Documentation/ABI/testing/sysfs-bus-iio-counter-104-quad-8
F: drivers/counter/104-quad-8.c

ACCES PCI-IDIO-16 GPIO DRIVER
diff --git a/drivers/counter/104-quad-8.c b/drivers/counter/104-quad-8.c
index 78766b6ec271..9691f8612be8 100644
--- a/drivers/counter/104-quad-8.c
+++ b/drivers/counter/104-quad-8.c
@@ -9,8 +9,6 @@
#include <linux/counter.h>
#include <linux/device.h>
#include <linux/errno.h>
-#include <linux/iio/iio.h>
-#include <linux/iio/types.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/isa.h>
@@ -29,7 +27,7 @@ MODULE_PARM_DESC(base, "ACCES 104-QUAD-8 base addresses");
#define QUAD8_NUM_COUNTERS 8

/**
- * struct quad8_iio - IIO device private data structure
+ * struct quad8 - device private data structure
* @counter: instance of the counter_device
* @fck_prescaler: array of filter clock prescaler configurations
* @preset: array of preset values
@@ -41,9 +39,9 @@ MODULE_PARM_DESC(base, "ACCES 104-QUAD-8 base addresses");
* @synchronous_mode: array of index function synchronous mode configurations
* @index_polarity: array of index function polarity configurations
* @cable_fault_enable: differential encoder cable status enable configurations
- * @base: base port address of the IIO device
+ * @base: base port address of the device
*/
-struct quad8_iio {
+struct quad8 {
struct mutex lock;
struct counter_device counter;
unsigned int fck_prescaler[QUAD8_NUM_COUNTERS];
@@ -98,532 +96,10 @@ struct quad8_iio {
#define QUAD8_CMR_QUADRATURE_X2 0x10
#define QUAD8_CMR_QUADRATURE_X4 0x18

-
-static int quad8_read_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan, int *val, int *val2, long mask)
-{
- struct quad8_iio *const priv = iio_priv(indio_dev);
- const int base_offset = priv->base + 2 * chan->channel;
- unsigned int flags;
- unsigned int borrow;
- unsigned int carry;
- int i;
-
- switch (mask) {
- case IIO_CHAN_INFO_RAW:
- if (chan->type == IIO_INDEX) {
- *val = !!(inb(priv->base + QUAD8_REG_INDEX_INPUT_LEVELS)
- & BIT(chan->channel));
- return IIO_VAL_INT;
- }
-
- flags = inb(base_offset + 1);
- borrow = flags & QUAD8_FLAG_BT;
- carry = !!(flags & QUAD8_FLAG_CT);
-
- /* Borrow XOR Carry effectively doubles count range */
- *val = (borrow ^ carry) << 24;
-
- mutex_lock(&priv->lock);
-
- /* Reset Byte Pointer; transfer Counter to Output Latch */
- outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_CNTR_OUT,
- base_offset + 1);
-
- for (i = 0; i < 3; i++)
- *val |= (unsigned int)inb(base_offset) << (8 * i);
-
- mutex_unlock(&priv->lock);
-
- return IIO_VAL_INT;
- case IIO_CHAN_INFO_ENABLE:
- *val = priv->ab_enable[chan->channel];
- return IIO_VAL_INT;
- case IIO_CHAN_INFO_SCALE:
- *val = 1;
- *val2 = priv->quadrature_scale[chan->channel];
- return IIO_VAL_FRACTIONAL_LOG2;
- }
-
- return -EINVAL;
-}
-
-static int quad8_write_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan, int val, int val2, long mask)
-{
- struct quad8_iio *const priv = iio_priv(indio_dev);
- const int base_offset = priv->base + 2 * chan->channel;
- int i;
- unsigned int ior_cfg;
-
- switch (mask) {
- case IIO_CHAN_INFO_RAW:
- if (chan->type == IIO_INDEX)
- return -EINVAL;
-
- /* Only 24-bit values are supported */
- if ((unsigned int)val > 0xFFFFFF)
- return -EINVAL;
-
- mutex_lock(&priv->lock);
-
- /* Reset Byte Pointer */
- outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
-
- /* Counter can only be set via Preset Register */
- for (i = 0; i < 3; i++)
- outb(val >> (8 * i), base_offset);
-
- /* Transfer Preset Register to Counter */
- outb(QUAD8_CTR_RLD | QUAD8_RLD_PRESET_CNTR, base_offset + 1);
-
- /* Reset Byte Pointer */
- outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
-
- /* Set Preset Register back to original value */
- val = priv->preset[chan->channel];
- for (i = 0; i < 3; i++)
- outb(val >> (8 * i), base_offset);
-
- /* Reset Borrow, Carry, Compare, and Sign flags */
- outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1);
- /* Reset Error flag */
- outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1);
-
- mutex_unlock(&priv->lock);
-
- return 0;
- case IIO_CHAN_INFO_ENABLE:
- /* only boolean values accepted */
- if (val < 0 || val > 1)
- return -EINVAL;
-
- mutex_lock(&priv->lock);
-
- priv->ab_enable[chan->channel] = val;
-
- ior_cfg = val | priv->preset_enable[chan->channel] << 1;
-
- /* Load I/O control configuration */
- outb(QUAD8_CTR_IOR | ior_cfg, base_offset + 1);
-
- mutex_unlock(&priv->lock);
-
- return 0;
- case IIO_CHAN_INFO_SCALE:
- mutex_lock(&priv->lock);
-
- /* Quadrature scaling only available in quadrature mode */
- if (!priv->quadrature_mode[chan->channel] &&
- (val2 || val != 1)) {
- mutex_unlock(&priv->lock);
- return -EINVAL;
- }
-
- /* Only three gain states (1, 0.5, 0.25) */
- if (val == 1 && !val2)
- priv->quadrature_scale[chan->channel] = 0;
- else if (!val)
- switch (val2) {
- case 500000:
- priv->quadrature_scale[chan->channel] = 1;
- break;
- case 250000:
- priv->quadrature_scale[chan->channel] = 2;
- break;
- default:
- mutex_unlock(&priv->lock);
- return -EINVAL;
- }
- else {
- mutex_unlock(&priv->lock);
- return -EINVAL;
- }
-
- mutex_unlock(&priv->lock);
- return 0;
- }
-
- return -EINVAL;
-}
-
-static const struct iio_info quad8_info = {
- .read_raw = quad8_read_raw,
- .write_raw = quad8_write_raw
-};
-
-static ssize_t quad8_read_preset(struct iio_dev *indio_dev, uintptr_t private,
- const struct iio_chan_spec *chan, char *buf)
-{
- const struct quad8_iio *const priv = iio_priv(indio_dev);
-
- return snprintf(buf, PAGE_SIZE, "%u\n", priv->preset[chan->channel]);
-}
-
-static ssize_t quad8_write_preset(struct iio_dev *indio_dev, uintptr_t private,
- const struct iio_chan_spec *chan, const char *buf, size_t len)
-{
- struct quad8_iio *const priv = iio_priv(indio_dev);
- const int base_offset = priv->base + 2 * chan->channel;
- unsigned int preset;
- int ret;
- int i;
-
- ret = kstrtouint(buf, 0, &preset);
- if (ret)
- return ret;
-
- /* Only 24-bit values are supported */
- if (preset > 0xFFFFFF)
- return -EINVAL;
-
- mutex_lock(&priv->lock);
-
- priv->preset[chan->channel] = preset;
-
- /* Reset Byte Pointer */
- outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
-
- /* Set Preset Register */
- for (i = 0; i < 3; i++)
- outb(preset >> (8 * i), base_offset);
-
- mutex_unlock(&priv->lock);
-
- return len;
-}
-
-static ssize_t quad8_read_set_to_preset_on_index(struct iio_dev *indio_dev,
- uintptr_t private, const struct iio_chan_spec *chan, char *buf)
-{
- const struct quad8_iio *const priv = iio_priv(indio_dev);
-
- return snprintf(buf, PAGE_SIZE, "%u\n",
- !priv->preset_enable[chan->channel]);
-}
-
-static ssize_t quad8_write_set_to_preset_on_index(struct iio_dev *indio_dev,
- uintptr_t private, const struct iio_chan_spec *chan, const char *buf,
- size_t len)
-{
- struct quad8_iio *const priv = iio_priv(indio_dev);
- const int base_offset = priv->base + 2 * chan->channel + 1;
- bool preset_enable;
- int ret;
- unsigned int ior_cfg;
-
- ret = kstrtobool(buf, &preset_enable);
- if (ret)
- return ret;
-
- /* Preset enable is active low in Input/Output Control register */
- preset_enable = !preset_enable;
-
- mutex_lock(&priv->lock);
-
- priv->preset_enable[chan->channel] = preset_enable;
-
- ior_cfg = priv->ab_enable[chan->channel] |
- (unsigned int)preset_enable << 1;
-
- /* Load I/O control configuration to Input / Output Control Register */
- outb(QUAD8_CTR_IOR | ior_cfg, base_offset);
-
- mutex_unlock(&priv->lock);
-
- return len;
-}
-
-static const char *const quad8_noise_error_states[] = {
- "No excessive noise is present at the count inputs",
- "Excessive noise is present at the count inputs"
-};
-
-static int quad8_get_noise_error(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan)
-{
- struct quad8_iio *const priv = iio_priv(indio_dev);
- const int base_offset = priv->base + 2 * chan->channel + 1;
-
- return !!(inb(base_offset) & QUAD8_FLAG_E);
-}
-
-static const struct iio_enum quad8_noise_error_enum = {
- .items = quad8_noise_error_states,
- .num_items = ARRAY_SIZE(quad8_noise_error_states),
- .get = quad8_get_noise_error
-};
-
-static const char *const quad8_count_direction_states[] = {
- "down",
- "up"
-};
-
-static int quad8_get_count_direction(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan)
-{
- struct quad8_iio *const priv = iio_priv(indio_dev);
- const int base_offset = priv->base + 2 * chan->channel + 1;
-
- return !!(inb(base_offset) & QUAD8_FLAG_UD);
-}
-
-static const struct iio_enum quad8_count_direction_enum = {
- .items = quad8_count_direction_states,
- .num_items = ARRAY_SIZE(quad8_count_direction_states),
- .get = quad8_get_count_direction
-};
-
-static const char *const quad8_count_modes[] = {
- "normal",
- "range limit",
- "non-recycle",
- "modulo-n"
-};
-
-static int quad8_set_count_mode(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan, unsigned int cnt_mode)
-{
- struct quad8_iio *const priv = iio_priv(indio_dev);
- unsigned int mode_cfg = cnt_mode << 1;
- const int base_offset = priv->base + 2 * chan->channel + 1;
-
- mutex_lock(&priv->lock);
-
- priv->count_mode[chan->channel] = cnt_mode;
-
- /* Add quadrature mode configuration */
- if (priv->quadrature_mode[chan->channel])
- mode_cfg |= (priv->quadrature_scale[chan->channel] + 1) << 3;
-
- /* Load mode configuration to Counter Mode Register */
- outb(QUAD8_CTR_CMR | mode_cfg, base_offset);
-
- mutex_unlock(&priv->lock);
-
- return 0;
-}
-
-static int quad8_get_count_mode(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan)
-{
- const struct quad8_iio *const priv = iio_priv(indio_dev);
-
- return priv->count_mode[chan->channel];
-}
-
-static const struct iio_enum quad8_count_mode_enum = {
- .items = quad8_count_modes,
- .num_items = ARRAY_SIZE(quad8_count_modes),
- .set = quad8_set_count_mode,
- .get = quad8_get_count_mode
-};
-
-static const char *const quad8_synchronous_modes[] = {
- "non-synchronous",
- "synchronous"
-};
-
-static int quad8_set_synchronous_mode(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan, unsigned int synchronous_mode)
-{
- struct quad8_iio *const priv = iio_priv(indio_dev);
- const int base_offset = priv->base + 2 * chan->channel + 1;
- unsigned int idr_cfg = synchronous_mode;
-
- mutex_lock(&priv->lock);
-
- idr_cfg |= priv->index_polarity[chan->channel] << 1;
-
- /* Index function must be non-synchronous in non-quadrature mode */
- if (synchronous_mode && !priv->quadrature_mode[chan->channel]) {
- mutex_unlock(&priv->lock);
- return -EINVAL;
- }
-
- priv->synchronous_mode[chan->channel] = synchronous_mode;
-
- /* Load Index Control configuration to Index Control Register */
- outb(QUAD8_CTR_IDR | idr_cfg, base_offset);
-
- mutex_unlock(&priv->lock);
-
- return 0;
-}
-
-static int quad8_get_synchronous_mode(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan)
-{
- const struct quad8_iio *const priv = iio_priv(indio_dev);
-
- return priv->synchronous_mode[chan->channel];
-}
-
-static const struct iio_enum quad8_synchronous_mode_enum = {
- .items = quad8_synchronous_modes,
- .num_items = ARRAY_SIZE(quad8_synchronous_modes),
- .set = quad8_set_synchronous_mode,
- .get = quad8_get_synchronous_mode
-};
-
-static const char *const quad8_quadrature_modes[] = {
- "non-quadrature",
- "quadrature"
-};
-
-static int quad8_set_quadrature_mode(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan, unsigned int quadrature_mode)
-{
- struct quad8_iio *const priv = iio_priv(indio_dev);
- const int base_offset = priv->base + 2 * chan->channel + 1;
- unsigned int mode_cfg;
-
- mutex_lock(&priv->lock);
-
- mode_cfg = priv->count_mode[chan->channel] << 1;
-
- if (quadrature_mode)
- mode_cfg |= (priv->quadrature_scale[chan->channel] + 1) << 3;
- else {
- /* Quadrature scaling only available in quadrature mode */
- priv->quadrature_scale[chan->channel] = 0;
-
- /* Synchronous function not supported in non-quadrature mode */
- if (priv->synchronous_mode[chan->channel])
- quad8_set_synchronous_mode(indio_dev, chan, 0);
- }
-
- priv->quadrature_mode[chan->channel] = quadrature_mode;
-
- /* Load mode configuration to Counter Mode Register */
- outb(QUAD8_CTR_CMR | mode_cfg, base_offset);
-
- mutex_unlock(&priv->lock);
-
- return 0;
-}
-
-static int quad8_get_quadrature_mode(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan)
-{
- const struct quad8_iio *const priv = iio_priv(indio_dev);
-
- return priv->quadrature_mode[chan->channel];
-}
-
-static const struct iio_enum quad8_quadrature_mode_enum = {
- .items = quad8_quadrature_modes,
- .num_items = ARRAY_SIZE(quad8_quadrature_modes),
- .set = quad8_set_quadrature_mode,
- .get = quad8_get_quadrature_mode
-};
-
-static const char *const quad8_index_polarity_modes[] = {
- "negative",
- "positive"
-};
-
-static int quad8_set_index_polarity(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan, unsigned int index_polarity)
-{
- struct quad8_iio *const priv = iio_priv(indio_dev);
- const int base_offset = priv->base + 2 * chan->channel + 1;
- unsigned int idr_cfg = index_polarity << 1;
-
- mutex_lock(&priv->lock);
-
- idr_cfg |= priv->synchronous_mode[chan->channel];
-
- priv->index_polarity[chan->channel] = index_polarity;
-
- /* Load Index Control configuration to Index Control Register */
- outb(QUAD8_CTR_IDR | idr_cfg, base_offset);
-
- mutex_unlock(&priv->lock);
-
- return 0;
-}
-
-static int quad8_get_index_polarity(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan)
-{
- const struct quad8_iio *const priv = iio_priv(indio_dev);
-
- return priv->index_polarity[chan->channel];
-}
-
-static const struct iio_enum quad8_index_polarity_enum = {
- .items = quad8_index_polarity_modes,
- .num_items = ARRAY_SIZE(quad8_index_polarity_modes),
- .set = quad8_set_index_polarity,
- .get = quad8_get_index_polarity
-};
-
-static const struct iio_chan_spec_ext_info quad8_count_ext_info[] = {
- {
- .name = "preset",
- .shared = IIO_SEPARATE,
- .read = quad8_read_preset,
- .write = quad8_write_preset
- },
- {
- .name = "set_to_preset_on_index",
- .shared = IIO_SEPARATE,
- .read = quad8_read_set_to_preset_on_index,
- .write = quad8_write_set_to_preset_on_index
- },
- IIO_ENUM("noise_error", IIO_SEPARATE, &quad8_noise_error_enum),
- IIO_ENUM_AVAILABLE("noise_error", &quad8_noise_error_enum),
- IIO_ENUM("count_direction", IIO_SEPARATE, &quad8_count_direction_enum),
- IIO_ENUM_AVAILABLE("count_direction", &quad8_count_direction_enum),
- IIO_ENUM("count_mode", IIO_SEPARATE, &quad8_count_mode_enum),
- IIO_ENUM_AVAILABLE("count_mode", &quad8_count_mode_enum),
- IIO_ENUM("quadrature_mode", IIO_SEPARATE, &quad8_quadrature_mode_enum),
- IIO_ENUM_AVAILABLE("quadrature_mode", &quad8_quadrature_mode_enum),
- {}
-};
-
-static const struct iio_chan_spec_ext_info quad8_index_ext_info[] = {
- IIO_ENUM("synchronous_mode", IIO_SEPARATE,
- &quad8_synchronous_mode_enum),
- IIO_ENUM_AVAILABLE("synchronous_mode", &quad8_synchronous_mode_enum),
- IIO_ENUM("index_polarity", IIO_SEPARATE, &quad8_index_polarity_enum),
- IIO_ENUM_AVAILABLE("index_polarity", &quad8_index_polarity_enum),
- {}
-};
-
-#define QUAD8_COUNT_CHAN(_chan) { \
- .type = IIO_COUNT, \
- .channel = (_chan), \
- .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
- BIT(IIO_CHAN_INFO_ENABLE) | BIT(IIO_CHAN_INFO_SCALE), \
- .ext_info = quad8_count_ext_info, \
- .indexed = 1 \
-}
-
-#define QUAD8_INDEX_CHAN(_chan) { \
- .type = IIO_INDEX, \
- .channel = (_chan), \
- .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
- .ext_info = quad8_index_ext_info, \
- .indexed = 1 \
-}
-
-static const struct iio_chan_spec quad8_channels[] = {
- QUAD8_COUNT_CHAN(0), QUAD8_INDEX_CHAN(0),
- QUAD8_COUNT_CHAN(1), QUAD8_INDEX_CHAN(1),
- QUAD8_COUNT_CHAN(2), QUAD8_INDEX_CHAN(2),
- QUAD8_COUNT_CHAN(3), QUAD8_INDEX_CHAN(3),
- QUAD8_COUNT_CHAN(4), QUAD8_INDEX_CHAN(4),
- QUAD8_COUNT_CHAN(5), QUAD8_INDEX_CHAN(5),
- QUAD8_COUNT_CHAN(6), QUAD8_INDEX_CHAN(6),
- QUAD8_COUNT_CHAN(7), QUAD8_INDEX_CHAN(7)
-};
-
static int quad8_signal_read(struct counter_device *counter,
struct counter_signal *signal, enum counter_signal_value *val)
{
- const struct quad8_iio *const priv = counter->priv;
+ const struct quad8 *const priv = counter->priv;
unsigned int state;

/* Only Index signal levels can be read */
@@ -641,7 +117,7 @@ static int quad8_signal_read(struct counter_device *counter,
static int quad8_count_read(struct counter_device *counter,
struct counter_count *count, unsigned long *val)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id;
unsigned int flags;
unsigned int borrow;
@@ -672,7 +148,7 @@ static int quad8_count_read(struct counter_device *counter,
static int quad8_count_write(struct counter_device *counter,
struct counter_count *count, unsigned long val)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id;
int i;

@@ -727,7 +203,7 @@ static enum counter_count_function quad8_count_functions_list[] = {
static int quad8_function_get(struct counter_device *counter,
struct counter_count *count, size_t *function)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
const int id = count->id;

mutex_lock(&priv->lock);
@@ -755,7 +231,7 @@ static int quad8_function_get(struct counter_device *counter,
static int quad8_function_set(struct counter_device *counter,
struct counter_count *count, size_t function)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
const int id = count->id;
unsigned int *const quadrature_mode = priv->quadrature_mode + id;
unsigned int *const scale = priv->quadrature_scale + id;
@@ -811,7 +287,7 @@ static int quad8_function_set(struct counter_device *counter,
static void quad8_direction_get(struct counter_device *counter,
struct counter_count *count, enum counter_count_direction *direction)
{
- const struct quad8_iio *const priv = counter->priv;
+ const struct quad8 *const priv = counter->priv;
unsigned int ud_flag;
const unsigned int flag_addr = priv->base + 2 * count->id + 1;

@@ -845,7 +321,7 @@ static int quad8_action_get(struct counter_device *counter,
struct counter_count *count, struct counter_synapse *synapse,
size_t *action)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
int err;
size_t function = 0;
const size_t signal_a_id = count->synapses[0].signal->id;
@@ -905,10 +381,15 @@ static const struct counter_ops quad8_ops = {
.action_get = quad8_action_get
};

+static const char *const quad8_index_polarity_modes[] = {
+ "negative",
+ "positive"
+};
+
static int quad8_index_polarity_get(struct counter_device *counter,
struct counter_signal *signal, size_t *index_polarity)
{
- const struct quad8_iio *const priv = counter->priv;
+ const struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id - 16;

*index_polarity = priv->index_polarity[channel_id];
@@ -919,7 +400,7 @@ static int quad8_index_polarity_get(struct counter_device *counter,
static int quad8_index_polarity_set(struct counter_device *counter,
struct counter_signal *signal, size_t index_polarity)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id - 16;
const int base_offset = priv->base + 2 * channel_id + 1;
unsigned int idr_cfg = index_polarity << 1;
@@ -945,10 +426,15 @@ static struct counter_signal_enum_ext quad8_index_pol_enum = {
.set = quad8_index_polarity_set
};

+static const char *const quad8_synchronous_modes[] = {
+ "non-synchronous",
+ "synchronous"
+};
+
static int quad8_synchronous_mode_get(struct counter_device *counter,
struct counter_signal *signal, size_t *synchronous_mode)
{
- const struct quad8_iio *const priv = counter->priv;
+ const struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id - 16;

*synchronous_mode = priv->synchronous_mode[channel_id];
@@ -959,7 +445,7 @@ static int quad8_synchronous_mode_get(struct counter_device *counter,
static int quad8_synchronous_mode_set(struct counter_device *counter,
struct counter_signal *signal, size_t synchronous_mode)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id - 16;
const int base_offset = priv->base + 2 * channel_id + 1;
unsigned int idr_cfg = synchronous_mode;
@@ -1001,7 +487,7 @@ static ssize_t quad8_count_floor_read(struct counter_device *counter,
static int quad8_count_mode_get(struct counter_device *counter,
struct counter_count *count, size_t *cnt_mode)
{
- const struct quad8_iio *const priv = counter->priv;
+ const struct quad8 *const priv = counter->priv;

/* Map 104-QUAD-8 count mode to Generic Counter count mode */
switch (priv->count_mode[count->id]) {
@@ -1025,7 +511,7 @@ static int quad8_count_mode_get(struct counter_device *counter,
static int quad8_count_mode_set(struct counter_device *counter,
struct counter_count *count, size_t cnt_mode)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
unsigned int mode_cfg;
const int base_offset = priv->base + 2 * count->id + 1;

@@ -1084,7 +570,7 @@ static ssize_t quad8_count_direction_read(struct counter_device *counter,
static ssize_t quad8_count_enable_read(struct counter_device *counter,
struct counter_count *count, void *private, char *buf)
{
- const struct quad8_iio *const priv = counter->priv;
+ const struct quad8 *const priv = counter->priv;

return sprintf(buf, "%u\n", priv->ab_enable[count->id]);
}
@@ -1092,7 +578,7 @@ static ssize_t quad8_count_enable_read(struct counter_device *counter,
static ssize_t quad8_count_enable_write(struct counter_device *counter,
struct counter_count *count, void *private, const char *buf, size_t len)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id;
int err;
bool ab_enable;
@@ -1116,10 +602,15 @@ static ssize_t quad8_count_enable_write(struct counter_device *counter,
return len;
}

+static const char *const quad8_noise_error_states[] = {
+ "No excessive noise is present at the count inputs",
+ "Excessive noise is present at the count inputs"
+};
+
static int quad8_error_noise_get(struct counter_device *counter,
struct counter_count *count, size_t *noise_error)
{
- const struct quad8_iio *const priv = counter->priv;
+ const struct quad8 *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id + 1;

*noise_error = !!(inb(base_offset) & QUAD8_FLAG_E);
@@ -1136,18 +627,18 @@ static struct counter_count_enum_ext quad8_error_noise_enum = {
static ssize_t quad8_count_preset_read(struct counter_device *counter,
struct counter_count *count, void *private, char *buf)
{
- const struct quad8_iio *const priv = counter->priv;
+ const struct quad8 *const priv = counter->priv;

return sprintf(buf, "%u\n", priv->preset[count->id]);
}

-static void quad8_preset_register_set(struct quad8_iio *quad8iio, int id,
- unsigned int preset)
+static void quad8_preset_register_set(struct quad8 *priv, int id,
+ unsigned int preset)
{
- const unsigned int base_offset = quad8iio->base + 2 * id;
+ const unsigned int base_offset = priv->base + 2 * id;
int i;

- quad8iio->preset[id] = preset;
+ priv->preset[id] = preset;

/* Reset Byte Pointer */
outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
@@ -1160,7 +651,7 @@ static void quad8_preset_register_set(struct quad8_iio *quad8iio, int id,
static ssize_t quad8_count_preset_write(struct counter_device *counter,
struct counter_count *count, void *private, const char *buf, size_t len)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
unsigned int preset;
int ret;

@@ -1184,7 +675,7 @@ static ssize_t quad8_count_preset_write(struct counter_device *counter,
static ssize_t quad8_count_ceiling_read(struct counter_device *counter,
struct counter_count *count, void *private, char *buf)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;

mutex_lock(&priv->lock);

@@ -1205,7 +696,7 @@ static ssize_t quad8_count_ceiling_read(struct counter_device *counter,
static ssize_t quad8_count_ceiling_write(struct counter_device *counter,
struct counter_count *count, void *private, const char *buf, size_t len)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
unsigned int ceiling;
int ret;

@@ -1235,7 +726,7 @@ static ssize_t quad8_count_ceiling_write(struct counter_device *counter,
static ssize_t quad8_count_preset_enable_read(struct counter_device *counter,
struct counter_count *count, void *private, char *buf)
{
- const struct quad8_iio *const priv = counter->priv;
+ const struct quad8 *const priv = counter->priv;

return sprintf(buf, "%u\n", !priv->preset_enable[count->id]);
}
@@ -1243,7 +734,7 @@ static ssize_t quad8_count_preset_enable_read(struct counter_device *counter,
static ssize_t quad8_count_preset_enable_write(struct counter_device *counter,
struct counter_count *count, void *private, const char *buf, size_t len)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id + 1;
bool preset_enable;
int ret;
@@ -1274,7 +765,7 @@ static ssize_t quad8_signal_cable_fault_read(struct counter_device *counter,
struct counter_signal *signal,
void *private, char *buf)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id / 2;
bool disabled;
unsigned int status;
@@ -1304,7 +795,7 @@ static ssize_t quad8_signal_cable_fault_enable_read(
struct counter_device *counter, struct counter_signal *signal,
void *private, char *buf)
{
- const struct quad8_iio *const priv = counter->priv;
+ const struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id / 2;
const unsigned int enb = !!(priv->cable_fault_enable & BIT(channel_id));

@@ -1315,7 +806,7 @@ static ssize_t quad8_signal_cable_fault_enable_write(
struct counter_device *counter, struct counter_signal *signal,
void *private, const char *buf, size_t len)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id / 2;
bool enable;
int ret;
@@ -1345,7 +836,7 @@ static ssize_t quad8_signal_cable_fault_enable_write(
static ssize_t quad8_signal_fck_prescaler_read(struct counter_device *counter,
struct counter_signal *signal, void *private, char *buf)
{
- const struct quad8_iio *const priv = counter->priv;
+ const struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id / 2;

return sprintf(buf, "%u\n", priv->fck_prescaler[channel_id]);
@@ -1355,7 +846,7 @@ static ssize_t quad8_signal_fck_prescaler_write(struct counter_device *counter,
struct counter_signal *signal, void *private, const char *buf,
size_t len)
{
- struct quad8_iio *const priv = counter->priv;
+ struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id / 2;
const int base_offset = priv->base + 2 * channel_id;
u8 prescaler;
@@ -1531,11 +1022,9 @@ static struct counter_count quad8_counts[] = {

static int quad8_probe(struct device *dev, unsigned int id)
{
- struct iio_dev *indio_dev;
- struct quad8_iio *quad8iio;
+ struct quad8 *priv;
int i, j;
unsigned int base_offset;
- int err;

if (!devm_request_region(dev, base[id], QUAD8_EXTENT, dev_name(dev))) {
dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n",
@@ -1543,32 +1032,23 @@ static int quad8_probe(struct device *dev, unsigned int id)
return -EBUSY;
}

- /* Allocate IIO device; this also allocates driver data structure */
- indio_dev = devm_iio_device_alloc(dev, sizeof(*quad8iio));
- if (!indio_dev)
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
return -ENOMEM;

- /* Initialize IIO device */
- indio_dev->info = &quad8_info;
- indio_dev->modes = INDIO_DIRECT_MODE;
- indio_dev->num_channels = ARRAY_SIZE(quad8_channels);
- indio_dev->channels = quad8_channels;
- indio_dev->name = dev_name(dev);
-
/* Initialize Counter device and driver data */
- quad8iio = iio_priv(indio_dev);
- quad8iio->counter.name = dev_name(dev);
- quad8iio->counter.parent = dev;
- quad8iio->counter.ops = &quad8_ops;
- quad8iio->counter.counts = quad8_counts;
- quad8iio->counter.num_counts = ARRAY_SIZE(quad8_counts);
- quad8iio->counter.signals = quad8_signals;
- quad8iio->counter.num_signals = ARRAY_SIZE(quad8_signals);
- quad8iio->counter.priv = quad8iio;
- quad8iio->base = base[id];
+ priv->counter.name = dev_name(dev);
+ priv->counter.parent = dev;
+ priv->counter.ops = &quad8_ops;
+ priv->counter.counts = quad8_counts;
+ priv->counter.num_counts = ARRAY_SIZE(quad8_counts);
+ priv->counter.signals = quad8_signals;
+ priv->counter.num_signals = ARRAY_SIZE(quad8_signals);
+ priv->counter.priv = priv;
+ priv->base = base[id];

/* Initialize mutex */
- mutex_init(&quad8iio->lock);
+ mutex_init(&priv->lock);

/* Reset all counters and disable interrupt function */
outb(QUAD8_CHAN_OP_RESET_COUNTERS, base[id] + QUAD8_REG_CHAN_OP);
@@ -1602,13 +1082,8 @@ static int quad8_probe(struct device *dev, unsigned int id)
/* Enable all counters */
outb(QUAD8_CHAN_OP_ENABLE_COUNTERS, base[id] + QUAD8_REG_CHAN_OP);

- /* Register IIO device */
- err = devm_iio_device_register(dev, indio_dev);
- if (err)
- return err;
-
/* Register Counter device */
- return devm_counter_register(dev, &quad8iio->counter);
+ return devm_counter_register(dev, &priv->counter);
}

static struct isa_driver quad8_driver = {
@@ -1621,5 +1096,5 @@ static struct isa_driver quad8_driver = {
module_isa_driver(quad8_driver, num_quad8);

MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>");
-MODULE_DESCRIPTION("ACCES 104-QUAD-8 IIO driver");
+MODULE_DESCRIPTION("ACCES 104-QUAD-8 driver");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/counter/Kconfig b/drivers/counter/Kconfig
index 2de53ab0dd25..63ffbebcf455 100644
--- a/drivers/counter/Kconfig
+++ b/drivers/counter/Kconfig
@@ -14,7 +14,7 @@ if COUNTER

config 104_QUAD_8
tristate "ACCES 104-QUAD-8 driver"
- depends on PC104 && X86 && IIO
+ depends on PC104 && X86
select ISA_BUS_API
help
Say yes here to build support for the ACCES 104-QUAD-8 quadrature
--
2.30.0
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  Last update: 2021-01-30 06:22    [W:0.057 / U:4.968 seconds]
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