--- /dev/null
+/*
+ comedi/drivers/ni_tio.c
+ Support for NI general purpose counters
+
+ Copyright (C) 2006 Frank Mori Hess <fmhess@users.sourceforge.net>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+/*
+Driver: ni_tio
+Description: National Instruments general purpose counters
+Devices:
+Author: J.P. Mellor <jpmellor@rose-hulman.edu>,
+ Herman.Bruyninckx@mech.kuleuven.ac.be,
+ Wim.Meeussen@mech.kuleuven.ac.be,
+ Klaas.Gadeyne@mech.kuleuven.ac.be,
+ Frank Mori Hess <fmhess@users.sourceforge.net>
+Updated: Thu Nov 16 09:50:32 EST 2006
+Status: works
+
+This module is not used directly by end-users. Rather, it
+is used by other drivers (for example ni_660x and ni_pcimio)
+to provide support for NI's general purpose counters. It was
+originally based on the counter code from ni_660x.c and
+ni_mio_common.c.
+
+References:
+DAQ 660x Register-Level Programmer Manual (NI 370505A-01)
+DAQ 6601/6602 User Manual (NI 322137B-01)
+340934b.pdf DAQ-STC reference manual
+
+*/
+/*
+TODO:
+ Support use of both banks X and Y
+*/
+
+#include "ni_tio_internal.h"
+
+static uint64_t ni_tio_clock_period_ps(const struct ni_gpct *counter,
+ unsigned generic_clock_source);
+static unsigned ni_tio_generic_clock_src_select(const struct ni_gpct *counter);
+
+MODULE_AUTHOR("Comedi <comedi@comedi.org>");
+MODULE_DESCRIPTION("Comedi support for NI general-purpose counters");
+MODULE_LICENSE("GPL");
+
+static inline enum Gi_Counting_Mode_Reg_Bits Gi_Alternate_Sync_Bit(enum
+ ni_gpct_variant variant)
+{
+ switch (variant) {
+ case ni_gpct_variant_e_series:
+ return 0;
+ break;
+ case ni_gpct_variant_m_series:
+ return Gi_M_Series_Alternate_Sync_Bit;
+ break;
+ case ni_gpct_variant_660x:
+ return Gi_660x_Alternate_Sync_Bit;
+ break;
+ default:
+ BUG();
+ break;
+ }
+ return 0;
+}
+static inline enum Gi_Counting_Mode_Reg_Bits Gi_Prescale_X2_Bit(enum
+ ni_gpct_variant variant)
+{
+ switch (variant) {
+ case ni_gpct_variant_e_series:
+ return 0;
+ break;
+ case ni_gpct_variant_m_series:
+ return Gi_M_Series_Prescale_X2_Bit;
+ break;
+ case ni_gpct_variant_660x:
+ return Gi_660x_Prescale_X2_Bit;
+ break;
+ default:
+ BUG();
+ break;
+ }
+ return 0;
+}
+static inline enum Gi_Counting_Mode_Reg_Bits Gi_Prescale_X8_Bit(enum
+ ni_gpct_variant variant)
+{
+ switch (variant) {
+ case ni_gpct_variant_e_series:
+ return 0;
+ break;
+ case ni_gpct_variant_m_series:
+ return Gi_M_Series_Prescale_X8_Bit;
+ break;
+ case ni_gpct_variant_660x:
+ return Gi_660x_Prescale_X8_Bit;
+ break;
+ default:
+ BUG();
+ break;
+ }
+ return 0;
+}
+static inline enum Gi_Counting_Mode_Reg_Bits Gi_HW_Arm_Select_Mask(enum
+ ni_gpct_variant variant)
+{
+ switch (variant) {
+ case ni_gpct_variant_e_series:
+ return 0;
+ break;
+ case ni_gpct_variant_m_series:
+ return Gi_M_Series_HW_Arm_Select_Mask;
+ break;
+ case ni_gpct_variant_660x:
+ return Gi_660x_HW_Arm_Select_Mask;
+ break;
+ default:
+ BUG();
+ break;
+ }
+ return 0;
+}
+
+/* clock sources for ni_660x boards, get bits with Gi_Source_Select_Bits() */
+enum ni_660x_clock_source {
+ NI_660x_Timebase_1_Clock = 0x0, /* 20MHz */
+ NI_660x_Source_Pin_i_Clock = 0x1,
+ NI_660x_Next_Gate_Clock = 0xa,
+ NI_660x_Timebase_2_Clock = 0x12, /* 100KHz */
+ NI_660x_Next_TC_Clock = 0x13,
+ NI_660x_Timebase_3_Clock = 0x1e, /* 80MHz */
+ NI_660x_Logic_Low_Clock = 0x1f,
+};
+static const unsigned ni_660x_max_rtsi_channel = 6;
+static inline unsigned NI_660x_RTSI_Clock(unsigned n)
+{
+ BUG_ON(n > ni_660x_max_rtsi_channel);
+ return (0xb + n);
+}
+static const unsigned ni_660x_max_source_pin = 7;
+static inline unsigned NI_660x_Source_Pin_Clock(unsigned n)
+{
+ BUG_ON(n > ni_660x_max_source_pin);
+ return (0x2 + n);
+}
+
+/* clock sources for ni e and m series boards, get bits with Gi_Source_Select_Bits() */
+enum ni_m_series_clock_source {
+ NI_M_Series_Timebase_1_Clock = 0x0, /* 20MHz */
+ NI_M_Series_Timebase_2_Clock = 0x12, /* 100KHz */
+ NI_M_Series_Next_TC_Clock = 0x13,
+ NI_M_Series_Next_Gate_Clock = 0x14, /* when Gi_Src_SubSelect = 0 */
+ NI_M_Series_PXI_Star_Trigger_Clock = 0x14, /* when Gi_Src_SubSelect = 1 */
+ NI_M_Series_PXI10_Clock = 0x1d,
+ NI_M_Series_Timebase_3_Clock = 0x1e, /* 80MHz, when Gi_Src_SubSelect = 0 */
+ NI_M_Series_Analog_Trigger_Out_Clock = 0x1e, /* when Gi_Src_SubSelect = 1 */
+ NI_M_Series_Logic_Low_Clock = 0x1f,
+};
+static const unsigned ni_m_series_max_pfi_channel = 15;
+static inline unsigned NI_M_Series_PFI_Clock(unsigned n)
+{
+ BUG_ON(n > ni_m_series_max_pfi_channel);
+ if (n < 10)
+ return 1 + n;
+ else
+ return 0xb + n;
+}
+static const unsigned ni_m_series_max_rtsi_channel = 7;
+static inline unsigned NI_M_Series_RTSI_Clock(unsigned n)
+{
+ BUG_ON(n > ni_m_series_max_rtsi_channel);
+ if (n == 7)
+ return 0x1b;
+ else
+ return 0xb + n;
+}
+
+enum ni_660x_gate_select {
+ NI_660x_Source_Pin_i_Gate_Select = 0x0,
+ NI_660x_Gate_Pin_i_Gate_Select = 0x1,
+ NI_660x_Next_SRC_Gate_Select = 0xa,
+ NI_660x_Next_Out_Gate_Select = 0x14,
+ NI_660x_Logic_Low_Gate_Select = 0x1f,
+};
+static const unsigned ni_660x_max_gate_pin = 7;
+static inline unsigned NI_660x_Gate_Pin_Gate_Select(unsigned n)
+{
+ BUG_ON(n > ni_660x_max_gate_pin);
+ return 0x2 + n;
+}
+static inline unsigned NI_660x_RTSI_Gate_Select(unsigned n)
+{
+ BUG_ON(n > ni_660x_max_rtsi_channel);
+ return 0xb + n;
+}
+
+enum ni_m_series_gate_select {
+ NI_M_Series_Timestamp_Mux_Gate_Select = 0x0,
+ NI_M_Series_AI_START2_Gate_Select = 0x12,
+ NI_M_Series_PXI_Star_Trigger_Gate_Select = 0x13,
+ NI_M_Series_Next_Out_Gate_Select = 0x14,
+ NI_M_Series_AI_START1_Gate_Select = 0x1c,
+ NI_M_Series_Next_SRC_Gate_Select = 0x1d,
+ NI_M_Series_Analog_Trigger_Out_Gate_Select = 0x1e,
+ NI_M_Series_Logic_Low_Gate_Select = 0x1f,
+};
+static inline unsigned NI_M_Series_RTSI_Gate_Select(unsigned n)
+{
+ BUG_ON(n > ni_m_series_max_rtsi_channel);
+ if (n == 7)
+ return 0x1b;
+ return 0xb + n;
+}
+static inline unsigned NI_M_Series_PFI_Gate_Select(unsigned n)
+{
+ BUG_ON(n > ni_m_series_max_pfi_channel);
+ if (n < 10)
+ return 1 + n;
+ return 0xb + n;
+}
+
+static inline unsigned Gi_Source_Select_Bits(unsigned source)
+{
+ return (source << Gi_Source_Select_Shift) & Gi_Source_Select_Mask;
+}
+static inline unsigned Gi_Gate_Select_Bits(unsigned gate_select)
+{
+ return (gate_select << Gi_Gate_Select_Shift) & Gi_Gate_Select_Mask;
+}
+
+enum ni_660x_second_gate_select {
+ NI_660x_Source_Pin_i_Second_Gate_Select = 0x0,
+ NI_660x_Up_Down_Pin_i_Second_Gate_Select = 0x1,
+ NI_660x_Next_SRC_Second_Gate_Select = 0xa,
+ NI_660x_Next_Out_Second_Gate_Select = 0x14,
+ NI_660x_Selected_Gate_Second_Gate_Select = 0x1e,
+ NI_660x_Logic_Low_Second_Gate_Select = 0x1f,
+};
+static const unsigned ni_660x_max_up_down_pin = 7;
+static inline unsigned NI_660x_Up_Down_Pin_Second_Gate_Select(unsigned n)
+{
+ BUG_ON(n > ni_660x_max_up_down_pin);
+ return 0x2 + n;
+}
+static inline unsigned NI_660x_RTSI_Second_Gate_Select(unsigned n)
+{
+ BUG_ON(n > ni_660x_max_rtsi_channel);
+ return 0xb + n;
+}
+
+static const unsigned int counter_status_mask =
+ COMEDI_COUNTER_ARMED | COMEDI_COUNTER_COUNTING;
+
+static int __init ni_tio_init_module(void)
+{
+ return 0;
+}
+
+module_init(ni_tio_init_module);
+
+static void __exit ni_tio_cleanup_module(void)
+{
+}
+
+module_exit(ni_tio_cleanup_module);
+
+struct ni_gpct_device *ni_gpct_device_construct(struct comedi_device * dev,
+ void (*write_register) (struct ni_gpct * counter, unsigned bits,
+ enum ni_gpct_register reg),
+ unsigned (*read_register) (struct ni_gpct * counter,
+ enum ni_gpct_register reg), enum ni_gpct_variant variant,
+ unsigned num_counters)
+{
+ unsigned i;
+
+ struct ni_gpct_device *counter_dev =
+ kzalloc(sizeof(struct ni_gpct_device), GFP_KERNEL);
+ if (counter_dev == NULL)
+ return NULL;
+ counter_dev->dev = dev;
+ counter_dev->write_register = write_register;
+ counter_dev->read_register = read_register;
+ counter_dev->variant = variant;
+ spin_lock_init(&counter_dev->regs_lock);
+ BUG_ON(num_counters == 0);
+ counter_dev->counters =
+ kzalloc(sizeof(struct ni_gpct) * num_counters, GFP_KERNEL);
+ if (counter_dev->counters == NULL) {
+ kfree(counter_dev);
+ return NULL;
+ }
+ for (i = 0; i < num_counters; ++i) {
+ counter_dev->counters[i].counter_dev = counter_dev;
+ spin_lock_init(&counter_dev->counters[i].lock);
+ }
+ counter_dev->num_counters = num_counters;
+ return counter_dev;
+}
+
+void ni_gpct_device_destroy(struct ni_gpct_device *counter_dev)
+{
+ if (counter_dev->counters == NULL)
+ return;
+ kfree(counter_dev->counters);
+ kfree(counter_dev);
+}
+
+static int ni_tio_second_gate_registers_present(const struct ni_gpct_device
+ *counter_dev)
+{
+ switch (counter_dev->variant) {
+ case ni_gpct_variant_e_series:
+ return 0;
+ break;
+ case ni_gpct_variant_m_series:
+ case ni_gpct_variant_660x:
+ return 1;
+ break;
+ default:
+ BUG();
+ break;
+ }
+ return 0;
+}
+
+static void ni_tio_reset_count_and_disarm(struct ni_gpct *counter)
+{
+ write_register(counter, Gi_Reset_Bit(counter->counter_index),
+ NITIO_Gxx_Joint_Reset_Reg(counter->counter_index));
+}
+
+void ni_tio_init_counter(struct ni_gpct *counter)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+
+ ni_tio_reset_count_and_disarm(counter);
+ /* initialize counter registers */
+ counter_dev->regs[NITIO_Gi_Autoincrement_Reg(counter->counter_index)] =
+ 0x0;
+ write_register(counter,
+ counter_dev->regs[NITIO_Gi_Autoincrement_Reg(counter->
+ counter_index)],
+ NITIO_Gi_Autoincrement_Reg(counter->counter_index));
+ ni_tio_set_bits(counter, NITIO_Gi_Command_Reg(counter->counter_index),
+ ~0, Gi_Synchronize_Gate_Bit);
+ ni_tio_set_bits(counter, NITIO_Gi_Mode_Reg(counter->counter_index), ~0,
+ 0);
+ counter_dev->regs[NITIO_Gi_LoadA_Reg(counter->counter_index)] = 0x0;
+ write_register(counter,
+ counter_dev->regs[NITIO_Gi_LoadA_Reg(counter->counter_index)],
+ NITIO_Gi_LoadA_Reg(counter->counter_index));
+ counter_dev->regs[NITIO_Gi_LoadB_Reg(counter->counter_index)] = 0x0;
+ write_register(counter,
+ counter_dev->regs[NITIO_Gi_LoadB_Reg(counter->counter_index)],
+ NITIO_Gi_LoadB_Reg(counter->counter_index));
+ ni_tio_set_bits(counter,
+ NITIO_Gi_Input_Select_Reg(counter->counter_index), ~0, 0);
+ if (ni_tio_counting_mode_registers_present(counter_dev)) {
+ ni_tio_set_bits(counter,
+ NITIO_Gi_Counting_Mode_Reg(counter->counter_index), ~0,
+ 0);
+ }
+ if (ni_tio_second_gate_registers_present(counter_dev)) {
+ counter_dev->regs[NITIO_Gi_Second_Gate_Reg(counter->
+ counter_index)] = 0x0;
+ write_register(counter,
+ counter_dev->regs[NITIO_Gi_Second_Gate_Reg(counter->
+ counter_index)],
+ NITIO_Gi_Second_Gate_Reg(counter->counter_index));
+ }
+ ni_tio_set_bits(counter,
+ NITIO_Gi_DMA_Config_Reg(counter->counter_index), ~0, 0x0);
+ ni_tio_set_bits(counter,
+ NITIO_Gi_Interrupt_Enable_Reg(counter->counter_index), ~0, 0x0);
+}
+
+static unsigned int ni_tio_counter_status(struct ni_gpct *counter)
+{
+ unsigned int status = 0;
+ const unsigned bits = read_register(counter,
+ NITIO_Gxx_Status_Reg(counter->counter_index));
+ if (bits & Gi_Armed_Bit(counter->counter_index)) {
+ status |= COMEDI_COUNTER_ARMED;
+ if (bits & Gi_Counting_Bit(counter->counter_index))
+ status |= COMEDI_COUNTER_COUNTING;
+ }
+ return status;
+}
+
+static void ni_tio_set_sync_mode(struct ni_gpct *counter, int force_alt_sync)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+ const unsigned counting_mode_reg =
+ NITIO_Gi_Counting_Mode_Reg(counter->counter_index);
+ static const uint64_t min_normal_sync_period_ps = 25000;
+ const uint64_t clock_period_ps = ni_tio_clock_period_ps(counter,
+ ni_tio_generic_clock_src_select(counter));
+
+ if (ni_tio_counting_mode_registers_present(counter_dev) == 0)
+ return;
+
+ switch (ni_tio_get_soft_copy(counter,
+ counting_mode_reg) & Gi_Counting_Mode_Mask) {
+ case Gi_Counting_Mode_QuadratureX1_Bits:
+ case Gi_Counting_Mode_QuadratureX2_Bits:
+ case Gi_Counting_Mode_QuadratureX4_Bits:
+ case Gi_Counting_Mode_Sync_Source_Bits:
+ force_alt_sync = 1;
+ break;
+ default:
+ break;
+ }
+ /* It's not clear what we should do if clock_period is unknown, so we are not
+ using the alt sync bit in that case, but allow the caller to decide by using the
+ force_alt_sync parameter. */
+ if (force_alt_sync ||
+ (clock_period_ps
+ && clock_period_ps < min_normal_sync_period_ps)) {
+ ni_tio_set_bits(counter, counting_mode_reg,
+ Gi_Alternate_Sync_Bit(counter_dev->variant),
+ Gi_Alternate_Sync_Bit(counter_dev->variant));
+ } else {
+ ni_tio_set_bits(counter, counting_mode_reg,
+ Gi_Alternate_Sync_Bit(counter_dev->variant), 0x0);
+ }
+}
+
+static int ni_tio_set_counter_mode(struct ni_gpct *counter, unsigned mode)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+ unsigned mode_reg_mask;
+ unsigned mode_reg_values;
+ unsigned input_select_bits = 0;
+ /* these bits map directly on to the mode register */
+ static const unsigned mode_reg_direct_mask =
+ NI_GPCT_GATE_ON_BOTH_EDGES_BIT | NI_GPCT_EDGE_GATE_MODE_MASK |
+ NI_GPCT_STOP_MODE_MASK | NI_GPCT_OUTPUT_MODE_MASK |
+ NI_GPCT_HARDWARE_DISARM_MASK | NI_GPCT_LOADING_ON_TC_BIT |
+ NI_GPCT_LOADING_ON_GATE_BIT | NI_GPCT_LOAD_B_SELECT_BIT;
+
+ mode_reg_mask = mode_reg_direct_mask | Gi_Reload_Source_Switching_Bit;
+ mode_reg_values = mode & mode_reg_direct_mask;
+ switch (mode & NI_GPCT_RELOAD_SOURCE_MASK) {
+ case NI_GPCT_RELOAD_SOURCE_FIXED_BITS:
+ break;
+ case NI_GPCT_RELOAD_SOURCE_SWITCHING_BITS:
+ mode_reg_values |= Gi_Reload_Source_Switching_Bit;
+ break;
+ case NI_GPCT_RELOAD_SOURCE_GATE_SELECT_BITS:
+ input_select_bits |= Gi_Gate_Select_Load_Source_Bit;
+ mode_reg_mask |= Gi_Gating_Mode_Mask;
+ mode_reg_values |= Gi_Level_Gating_Bits;
+ break;
+ default:
+ break;
+ }
+ ni_tio_set_bits(counter, NITIO_Gi_Mode_Reg(counter->counter_index),
+ mode_reg_mask, mode_reg_values);
+
+ if (ni_tio_counting_mode_registers_present(counter_dev)) {
+ unsigned counting_mode_bits = 0;
+ counting_mode_bits |=
+ (mode >> NI_GPCT_COUNTING_MODE_SHIFT) &
+ Gi_Counting_Mode_Mask;
+ counting_mode_bits |=
+ ((mode >> NI_GPCT_INDEX_PHASE_BITSHIFT) <<
+ Gi_Index_Phase_Bitshift) & Gi_Index_Phase_Mask;
+ if (mode & NI_GPCT_INDEX_ENABLE_BIT) {
+ counting_mode_bits |= Gi_Index_Mode_Bit;
+ }
+ ni_tio_set_bits(counter,
+ NITIO_Gi_Counting_Mode_Reg(counter->counter_index),
+ Gi_Counting_Mode_Mask | Gi_Index_Phase_Mask |
+ Gi_Index_Mode_Bit, counting_mode_bits);
+ ni_tio_set_sync_mode(counter, 0);
+ }
+
+ ni_tio_set_bits(counter, NITIO_Gi_Command_Reg(counter->counter_index),
+ Gi_Up_Down_Mask,
+ (mode >> NI_GPCT_COUNTING_DIRECTION_SHIFT) << Gi_Up_Down_Shift);
+
+ if (mode & NI_GPCT_OR_GATE_BIT) {
+ input_select_bits |= Gi_Or_Gate_Bit;
+ }
+ if (mode & NI_GPCT_INVERT_OUTPUT_BIT) {
+ input_select_bits |= Gi_Output_Polarity_Bit;
+ }
+ ni_tio_set_bits(counter,
+ NITIO_Gi_Input_Select_Reg(counter->counter_index),
+ Gi_Gate_Select_Load_Source_Bit | Gi_Or_Gate_Bit |
+ Gi_Output_Polarity_Bit, input_select_bits);
+
+ return 0;
+}
+
+int ni_tio_arm(struct ni_gpct *counter, int arm, unsigned start_trigger)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+
+ unsigned command_transient_bits = 0;
+
+ if (arm) {
+ switch (start_trigger) {
+ case NI_GPCT_ARM_IMMEDIATE:
+ command_transient_bits |= Gi_Arm_Bit;
+ break;
+ case NI_GPCT_ARM_PAIRED_IMMEDIATE:
+ command_transient_bits |= Gi_Arm_Bit | Gi_Arm_Copy_Bit;
+ break;
+ default:
+ break;
+ }
+ if (ni_tio_counting_mode_registers_present(counter_dev)) {
+ unsigned counting_mode_bits = 0;
+
+ switch (start_trigger) {
+ case NI_GPCT_ARM_IMMEDIATE:
+ case NI_GPCT_ARM_PAIRED_IMMEDIATE:
+ break;
+ default:
+ if (start_trigger & NI_GPCT_ARM_UNKNOWN) {
+ /* pass-through the least significant bits so we can figure out what select later */
+ unsigned hw_arm_select_bits =
+ (start_trigger <<
+ Gi_HW_Arm_Select_Shift) &
+ Gi_HW_Arm_Select_Mask
+ (counter_dev->variant);
+
+ counting_mode_bits |=
+ Gi_HW_Arm_Enable_Bit |
+ hw_arm_select_bits;
+ } else {
+ return -EINVAL;
+ }
+ break;
+ }
+ ni_tio_set_bits(counter,
+ NITIO_Gi_Counting_Mode_Reg(counter->
+ counter_index),
+ Gi_HW_Arm_Select_Mask(counter_dev->
+ variant) | Gi_HW_Arm_Enable_Bit,
+ counting_mode_bits);
+ }
+ } else {
+ command_transient_bits |= Gi_Disarm_Bit;
+ }
+ ni_tio_set_bits_transient(counter,
+ NITIO_Gi_Command_Reg(counter->counter_index), 0, 0,
+ command_transient_bits);
+ return 0;
+}
+
+static unsigned ni_660x_source_select_bits(unsigned int clock_source)
+{
+ unsigned ni_660x_clock;
+ unsigned i;
+ const unsigned clock_select_bits =
+ clock_source & NI_GPCT_CLOCK_SRC_SELECT_MASK;
+
+ switch (clock_select_bits) {
+ case NI_GPCT_TIMEBASE_1_CLOCK_SRC_BITS:
+ ni_660x_clock = NI_660x_Timebase_1_Clock;
+ break;
+ case NI_GPCT_TIMEBASE_2_CLOCK_SRC_BITS:
+ ni_660x_clock = NI_660x_Timebase_2_Clock;
+ break;
+ case NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS:
+ ni_660x_clock = NI_660x_Timebase_3_Clock;
+ break;
+ case NI_GPCT_LOGIC_LOW_CLOCK_SRC_BITS:
+ ni_660x_clock = NI_660x_Logic_Low_Clock;
+ break;
+ case NI_GPCT_SOURCE_PIN_i_CLOCK_SRC_BITS:
+ ni_660x_clock = NI_660x_Source_Pin_i_Clock;
+ break;
+ case NI_GPCT_NEXT_GATE_CLOCK_SRC_BITS:
+ ni_660x_clock = NI_660x_Next_Gate_Clock;
+ break;
+ case NI_GPCT_NEXT_TC_CLOCK_SRC_BITS:
+ ni_660x_clock = NI_660x_Next_TC_Clock;
+ break;
+ default:
+ for (i = 0; i <= ni_660x_max_rtsi_channel; ++i) {
+ if (clock_select_bits == NI_GPCT_RTSI_CLOCK_SRC_BITS(i)) {
+ ni_660x_clock = NI_660x_RTSI_Clock(i);
+ break;
+ }
+ }
+ if (i <= ni_660x_max_rtsi_channel)
+ break;
+ for (i = 0; i <= ni_660x_max_source_pin; ++i) {
+ if (clock_select_bits ==
+ NI_GPCT_SOURCE_PIN_CLOCK_SRC_BITS(i)) {
+ ni_660x_clock = NI_660x_Source_Pin_Clock(i);
+ break;
+ }
+ }
+ if (i <= ni_660x_max_source_pin)
+ break;
+ ni_660x_clock = 0;
+ BUG();
+ break;
+ }
+ return Gi_Source_Select_Bits(ni_660x_clock);
+}
+
+static unsigned ni_m_series_source_select_bits(unsigned int clock_source)
+{
+ unsigned ni_m_series_clock;
+ unsigned i;
+ const unsigned clock_select_bits =
+ clock_source & NI_GPCT_CLOCK_SRC_SELECT_MASK;
+ switch (clock_select_bits) {
+ case NI_GPCT_TIMEBASE_1_CLOCK_SRC_BITS:
+ ni_m_series_clock = NI_M_Series_Timebase_1_Clock;
+ break;
+ case NI_GPCT_TIMEBASE_2_CLOCK_SRC_BITS:
+ ni_m_series_clock = NI_M_Series_Timebase_2_Clock;
+ break;
+ case NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS:
+ ni_m_series_clock = NI_M_Series_Timebase_3_Clock;
+ break;
+ case NI_GPCT_LOGIC_LOW_CLOCK_SRC_BITS:
+ ni_m_series_clock = NI_M_Series_Logic_Low_Clock;
+ break;
+ case NI_GPCT_NEXT_GATE_CLOCK_SRC_BITS:
+ ni_m_series_clock = NI_M_Series_Next_Gate_Clock;
+ break;
+ case NI_GPCT_NEXT_TC_CLOCK_SRC_BITS:
+ ni_m_series_clock = NI_M_Series_Next_TC_Clock;
+ break;
+ case NI_GPCT_PXI10_CLOCK_SRC_BITS:
+ ni_m_series_clock = NI_M_Series_PXI10_Clock;
+ break;
+ case NI_GPCT_PXI_STAR_TRIGGER_CLOCK_SRC_BITS:
+ ni_m_series_clock = NI_M_Series_PXI_Star_Trigger_Clock;
+ break;
+ case NI_GPCT_ANALOG_TRIGGER_OUT_CLOCK_SRC_BITS:
+ ni_m_series_clock = NI_M_Series_Analog_Trigger_Out_Clock;
+ break;
+ default:
+ for (i = 0; i <= ni_m_series_max_rtsi_channel; ++i) {
+ if (clock_select_bits == NI_GPCT_RTSI_CLOCK_SRC_BITS(i)) {
+ ni_m_series_clock = NI_M_Series_RTSI_Clock(i);
+ break;
+ }
+ }
+ if (i <= ni_m_series_max_rtsi_channel)
+ break;
+ for (i = 0; i <= ni_m_series_max_pfi_channel; ++i) {
+ if (clock_select_bits == NI_GPCT_PFI_CLOCK_SRC_BITS(i)) {
+ ni_m_series_clock = NI_M_Series_PFI_Clock(i);
+ break;
+ }
+ }
+ if (i <= ni_m_series_max_pfi_channel)
+ break;
+ rt_printk("invalid clock source 0x%lx\n",
+ (unsigned long)clock_source);
+ BUG();
+ ni_m_series_clock = 0;
+ break;
+ }
+ return Gi_Source_Select_Bits(ni_m_series_clock);
+};
+
+static void ni_tio_set_source_subselect(struct ni_gpct *counter,
+ unsigned int clock_source)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+ const unsigned second_gate_reg =
+ NITIO_Gi_Second_Gate_Reg(counter->counter_index);
+
+ if (counter_dev->variant != ni_gpct_variant_m_series)
+ return;
+ switch (clock_source & NI_GPCT_CLOCK_SRC_SELECT_MASK) {
+ /* Gi_Source_Subselect is zero */
+ case NI_GPCT_NEXT_GATE_CLOCK_SRC_BITS:
+ case NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS:
+ counter_dev->regs[second_gate_reg] &= ~Gi_Source_Subselect_Bit;
+ break;
+ /* Gi_Source_Subselect is one */
+ case NI_GPCT_ANALOG_TRIGGER_OUT_CLOCK_SRC_BITS:
+ case NI_GPCT_PXI_STAR_TRIGGER_CLOCK_SRC_BITS:
+ counter_dev->regs[second_gate_reg] |= Gi_Source_Subselect_Bit;
+ break;
+ /* Gi_Source_Subselect doesn't matter */
+ default:
+ return;
+ break;
+ }
+ write_register(counter, counter_dev->regs[second_gate_reg],
+ second_gate_reg);
+}
+
+static int ni_tio_set_clock_src(struct ni_gpct *counter,
+ unsigned int clock_source, unsigned int period_ns)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+ unsigned input_select_bits = 0;
+ static const uint64_t pico_per_nano = 1000;
+
+/*FIXME: validate clock source */
+ switch (counter_dev->variant) {
+ case ni_gpct_variant_660x:
+ input_select_bits |= ni_660x_source_select_bits(clock_source);
+ break;
+ case ni_gpct_variant_e_series:
+ case ni_gpct_variant_m_series:
+ input_select_bits |=
+ ni_m_series_source_select_bits(clock_source);
+ break;
+ default:
+ BUG();
+ break;
+ }
+ if (clock_source & NI_GPCT_INVERT_CLOCK_SRC_BIT)
+ input_select_bits |= Gi_Source_Polarity_Bit;
+ ni_tio_set_bits(counter,
+ NITIO_Gi_Input_Select_Reg(counter->counter_index),
+ Gi_Source_Select_Mask | Gi_Source_Polarity_Bit,
+ input_select_bits);
+ ni_tio_set_source_subselect(counter, clock_source);
+ if (ni_tio_counting_mode_registers_present(counter_dev)) {
+ const unsigned prescaling_mode =
+ clock_source & NI_GPCT_PRESCALE_MODE_CLOCK_SRC_MASK;
+ unsigned counting_mode_bits = 0;
+
+ switch (prescaling_mode) {
+ case NI_GPCT_NO_PRESCALE_CLOCK_SRC_BITS:
+ break;
+ case NI_GPCT_PRESCALE_X2_CLOCK_SRC_BITS:
+ counting_mode_bits |=
+ Gi_Prescale_X2_Bit(counter_dev->variant);
+ break;
+ case NI_GPCT_PRESCALE_X8_CLOCK_SRC_BITS:
+ counting_mode_bits |=
+ Gi_Prescale_X8_Bit(counter_dev->variant);
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+ ni_tio_set_bits(counter,
+ NITIO_Gi_Counting_Mode_Reg(counter->counter_index),
+ Gi_Prescale_X2_Bit(counter_dev->
+ variant) | Gi_Prescale_X8_Bit(counter_dev->
+ variant), counting_mode_bits);
+ }
+ counter->clock_period_ps = pico_per_nano * period_ns;
+ ni_tio_set_sync_mode(counter, 0);
+ return 0;
+}
+
+static unsigned ni_tio_clock_src_modifiers(const struct ni_gpct *counter)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+ const unsigned counting_mode_bits = ni_tio_get_soft_copy(counter,
+ NITIO_Gi_Counting_Mode_Reg(counter->counter_index));
+ unsigned bits = 0;
+
+ if (ni_tio_get_soft_copy(counter,
+ NITIO_Gi_Input_Select_Reg(counter->
+ counter_index)) & Gi_Source_Polarity_Bit)
+ bits |= NI_GPCT_INVERT_CLOCK_SRC_BIT;
+ if (counting_mode_bits & Gi_Prescale_X2_Bit(counter_dev->variant))
+ bits |= NI_GPCT_PRESCALE_X2_CLOCK_SRC_BITS;
+ if (counting_mode_bits & Gi_Prescale_X8_Bit(counter_dev->variant))
+ bits |= NI_GPCT_PRESCALE_X8_CLOCK_SRC_BITS;
+ return bits;
+}
+
+static unsigned ni_m_series_clock_src_select(const struct ni_gpct *counter)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+ const unsigned second_gate_reg =
+ NITIO_Gi_Second_Gate_Reg(counter->counter_index);
+ unsigned clock_source = 0;
+ unsigned i;
+ const unsigned input_select = (ni_tio_get_soft_copy(counter,
+ NITIO_Gi_Input_Select_Reg(counter->
+ counter_index)) & Gi_Source_Select_Mask) >>
+ Gi_Source_Select_Shift;
+
+ switch (input_select) {
+ case NI_M_Series_Timebase_1_Clock:
+ clock_source = NI_GPCT_TIMEBASE_1_CLOCK_SRC_BITS;
+ break;
+ case NI_M_Series_Timebase_2_Clock:
+ clock_source = NI_GPCT_TIMEBASE_2_CLOCK_SRC_BITS;
+ break;
+ case NI_M_Series_Timebase_3_Clock:
+ if (counter_dev->
+ regs[second_gate_reg] & Gi_Source_Subselect_Bit)
+ clock_source =
+ NI_GPCT_ANALOG_TRIGGER_OUT_CLOCK_SRC_BITS;
+ else
+ clock_source = NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS;
+ break;
+ case NI_M_Series_Logic_Low_Clock:
+ clock_source = NI_GPCT_LOGIC_LOW_CLOCK_SRC_BITS;
+ break;
+ case NI_M_Series_Next_Gate_Clock:
+ if (counter_dev->
+ regs[second_gate_reg] & Gi_Source_Subselect_Bit)
+ clock_source = NI_GPCT_PXI_STAR_TRIGGER_CLOCK_SRC_BITS;
+ else
+ clock_source = NI_GPCT_NEXT_GATE_CLOCK_SRC_BITS;
+ break;
+ case NI_M_Series_PXI10_Clock:
+ clock_source = NI_GPCT_PXI10_CLOCK_SRC_BITS;
+ break;
+ case NI_M_Series_Next_TC_Clock:
+ clock_source = NI_GPCT_NEXT_TC_CLOCK_SRC_BITS;
+ break;
+ default:
+ for (i = 0; i <= ni_m_series_max_rtsi_channel; ++i) {
+ if (input_select == NI_M_Series_RTSI_Clock(i)) {
+ clock_source = NI_GPCT_RTSI_CLOCK_SRC_BITS(i);
+ break;
+ }
+ }
+ if (i <= ni_m_series_max_rtsi_channel)
+ break;
+ for (i = 0; i <= ni_m_series_max_pfi_channel; ++i) {
+ if (input_select == NI_M_Series_PFI_Clock(i)) {
+ clock_source = NI_GPCT_PFI_CLOCK_SRC_BITS(i);
+ break;
+ }
+ }
+ if (i <= ni_m_series_max_pfi_channel)
+ break;
+ BUG();
+ break;
+ }
+ clock_source |= ni_tio_clock_src_modifiers(counter);
+ return clock_source;
+}
+
+static unsigned ni_660x_clock_src_select(const struct ni_gpct *counter)
+{
+ unsigned clock_source = 0;
+ unsigned i;
+ const unsigned input_select = (ni_tio_get_soft_copy(counter,
+ NITIO_Gi_Input_Select_Reg(counter->
+ counter_index)) & Gi_Source_Select_Mask) >>
+ Gi_Source_Select_Shift;
+
+ switch (input_select) {
+ case NI_660x_Timebase_1_Clock:
+ clock_source = NI_GPCT_TIMEBASE_1_CLOCK_SRC_BITS;
+ break;
+ case NI_660x_Timebase_2_Clock:
+ clock_source = NI_GPCT_TIMEBASE_2_CLOCK_SRC_BITS;
+ break;
+ case NI_660x_Timebase_3_Clock:
+ clock_source = NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS;
+ break;
+ case NI_660x_Logic_Low_Clock:
+ clock_source = NI_GPCT_LOGIC_LOW_CLOCK_SRC_BITS;
+ break;
+ case NI_660x_Source_Pin_i_Clock:
+ clock_source = NI_GPCT_SOURCE_PIN_i_CLOCK_SRC_BITS;
+ break;
+ case NI_660x_Next_Gate_Clock:
+ clock_source = NI_GPCT_NEXT_GATE_CLOCK_SRC_BITS;
+ break;
+ case NI_660x_Next_TC_Clock:
+ clock_source = NI_GPCT_NEXT_TC_CLOCK_SRC_BITS;
+ break;
+ default:
+ for (i = 0; i <= ni_660x_max_rtsi_channel; ++i) {
+ if (input_select == NI_660x_RTSI_Clock(i)) {
+ clock_source = NI_GPCT_RTSI_CLOCK_SRC_BITS(i);
+ break;
+ }
+ }
+ if (i <= ni_660x_max_rtsi_channel)
+ break;
+ for (i = 0; i <= ni_660x_max_source_pin; ++i) {
+ if (input_select == NI_660x_Source_Pin_Clock(i)) {
+ clock_source =
+ NI_GPCT_SOURCE_PIN_CLOCK_SRC_BITS(i);
+ break;
+ }
+ }
+ if (i <= ni_660x_max_source_pin)
+ break;
+ BUG();
+ break;
+ }
+ clock_source |= ni_tio_clock_src_modifiers(counter);
+ return clock_source;
+}
+
+static unsigned ni_tio_generic_clock_src_select(const struct ni_gpct *counter)
+{
+ switch (counter->counter_dev->variant) {
+ case ni_gpct_variant_e_series:
+ case ni_gpct_variant_m_series:
+ return ni_m_series_clock_src_select(counter);
+ break;
+ case ni_gpct_variant_660x:
+ return ni_660x_clock_src_select(counter);
+ break;
+ default:
+ BUG();
+ break;
+ }
+ return 0;
+}
+
+static uint64_t ni_tio_clock_period_ps(const struct ni_gpct *counter,
+ unsigned generic_clock_source)
+{
+ uint64_t clock_period_ps;
+
+ switch (generic_clock_source & NI_GPCT_CLOCK_SRC_SELECT_MASK) {
+ case NI_GPCT_TIMEBASE_1_CLOCK_SRC_BITS:
+ clock_period_ps = 50000;
+ break;
+ case NI_GPCT_TIMEBASE_2_CLOCK_SRC_BITS:
+ clock_period_ps = 10000000;
+ break;
+ case NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS:
+ clock_period_ps = 12500;
+ break;
+ case NI_GPCT_PXI10_CLOCK_SRC_BITS:
+ clock_period_ps = 100000;
+ break;
+ default:
+ /* clock period is specified by user with prescaling already taken into account. */
+ return counter->clock_period_ps;
+ break;
+ }
+
+ switch (generic_clock_source & NI_GPCT_PRESCALE_MODE_CLOCK_SRC_MASK) {
+ case NI_GPCT_NO_PRESCALE_CLOCK_SRC_BITS:
+ break;
+ case NI_GPCT_PRESCALE_X2_CLOCK_SRC_BITS:
+ clock_period_ps *= 2;
+ break;
+ case NI_GPCT_PRESCALE_X8_CLOCK_SRC_BITS:
+ clock_period_ps *= 8;
+ break;
+ default:
+ BUG();
+ break;
+ }
+ return clock_period_ps;
+}
+
+static void ni_tio_get_clock_src(struct ni_gpct *counter,
+ unsigned int * clock_source, unsigned int * period_ns)
+{
+ static const unsigned pico_per_nano = 1000;
+ uint64_t temp64;
+ *clock_source = ni_tio_generic_clock_src_select(counter);
+ temp64 = ni_tio_clock_period_ps(counter, *clock_source);
+ do_div(temp64, pico_per_nano);
+ *period_ns = temp64;
+}
+
+static void ni_tio_set_first_gate_modifiers(struct ni_gpct *counter,
+ unsigned int gate_source)
+{
+ const unsigned mode_mask = Gi_Gate_Polarity_Bit | Gi_Gating_Mode_Mask;
+ unsigned mode_values = 0;
+
+ if (gate_source & CR_INVERT) {
+ mode_values |= Gi_Gate_Polarity_Bit;
+ }
+ if (gate_source & CR_EDGE) {
+ mode_values |= Gi_Rising_Edge_Gating_Bits;
+ } else {
+ mode_values |= Gi_Level_Gating_Bits;
+ }
+ ni_tio_set_bits(counter, NITIO_Gi_Mode_Reg(counter->counter_index),
+ mode_mask, mode_values);
+}
+
+static int ni_660x_set_first_gate(struct ni_gpct *counter, unsigned int gate_source)
+{
+ const unsigned selected_gate = CR_CHAN(gate_source);
+ /* bits of selected_gate that may be meaningful to input select register */
+ const unsigned selected_gate_mask = 0x1f;
+ unsigned ni_660x_gate_select;
+ unsigned i;
+
+ switch (selected_gate) {
+ case NI_GPCT_NEXT_SOURCE_GATE_SELECT:
+ ni_660x_gate_select = NI_660x_Next_SRC_Gate_Select;
+ break;
+ case NI_GPCT_NEXT_OUT_GATE_SELECT:
+ case NI_GPCT_LOGIC_LOW_GATE_SELECT:
+ case NI_GPCT_SOURCE_PIN_i_GATE_SELECT:
+ case NI_GPCT_GATE_PIN_i_GATE_SELECT:
+ ni_660x_gate_select = selected_gate & selected_gate_mask;
+ break;
+ default:
+ for (i = 0; i <= ni_660x_max_rtsi_channel; ++i) {
+ if (selected_gate == NI_GPCT_RTSI_GATE_SELECT(i)) {
+ ni_660x_gate_select =
+ selected_gate & selected_gate_mask;
+ break;
+ }
+ }
+ if (i <= ni_660x_max_rtsi_channel)
+ break;
+ for (i = 0; i <= ni_660x_max_gate_pin; ++i) {
+ if (selected_gate == NI_GPCT_GATE_PIN_GATE_SELECT(i)) {
+ ni_660x_gate_select =
+ selected_gate & selected_gate_mask;
+ break;
+ }
+ }
+ if (i <= ni_660x_max_gate_pin)
+ break;
+ return -EINVAL;
+ break;
+ }
+ ni_tio_set_bits(counter,
+ NITIO_Gi_Input_Select_Reg(counter->counter_index),
+ Gi_Gate_Select_Mask, Gi_Gate_Select_Bits(ni_660x_gate_select));
+ return 0;
+}
+
+static int ni_m_series_set_first_gate(struct ni_gpct *counter,
+ unsigned int gate_source)
+{
+ const unsigned selected_gate = CR_CHAN(gate_source);
+ /* bits of selected_gate that may be meaningful to input select register */
+ const unsigned selected_gate_mask = 0x1f;
+ unsigned ni_m_series_gate_select;
+ unsigned i;
+
+ switch (selected_gate) {
+ case NI_GPCT_TIMESTAMP_MUX_GATE_SELECT:
+ case NI_GPCT_AI_START2_GATE_SELECT:
+ case NI_GPCT_PXI_STAR_TRIGGER_GATE_SELECT:
+ case NI_GPCT_NEXT_OUT_GATE_SELECT:
+ case NI_GPCT_AI_START1_GATE_SELECT:
+ case NI_GPCT_NEXT_SOURCE_GATE_SELECT:
+ case NI_GPCT_ANALOG_TRIGGER_OUT_GATE_SELECT:
+ case NI_GPCT_LOGIC_LOW_GATE_SELECT:
+ ni_m_series_gate_select = selected_gate & selected_gate_mask;
+ break;
+ default:
+ for (i = 0; i <= ni_m_series_max_rtsi_channel; ++i) {
+ if (selected_gate == NI_GPCT_RTSI_GATE_SELECT(i)) {
+ ni_m_series_gate_select =
+ selected_gate & selected_gate_mask;
+ break;
+ }
+ }
+ if (i <= ni_m_series_max_rtsi_channel)
+ break;
+ for (i = 0; i <= ni_m_series_max_pfi_channel; ++i) {
+ if (selected_gate == NI_GPCT_PFI_GATE_SELECT(i)) {
+ ni_m_series_gate_select =
+ selected_gate & selected_gate_mask;
+ break;
+ }
+ }
+ if (i <= ni_m_series_max_pfi_channel)
+ break;
+ return -EINVAL;
+ break;
+ }
+ ni_tio_set_bits(counter,
+ NITIO_Gi_Input_Select_Reg(counter->counter_index),
+ Gi_Gate_Select_Mask,
+ Gi_Gate_Select_Bits(ni_m_series_gate_select));
+ return 0;
+}
+
+static int ni_660x_set_second_gate(struct ni_gpct *counter,
+ unsigned int gate_source)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+ const unsigned second_gate_reg =
+ NITIO_Gi_Second_Gate_Reg(counter->counter_index);
+ const unsigned selected_second_gate = CR_CHAN(gate_source);
+ /* bits of second_gate that may be meaningful to second gate register */
+ static const unsigned selected_second_gate_mask = 0x1f;
+ unsigned ni_660x_second_gate_select;
+ unsigned i;
+
+ switch (selected_second_gate) {
+ case NI_GPCT_SOURCE_PIN_i_GATE_SELECT:
+ case NI_GPCT_UP_DOWN_PIN_i_GATE_SELECT:
+ case NI_GPCT_SELECTED_GATE_GATE_SELECT:
+ case NI_GPCT_NEXT_OUT_GATE_SELECT:
+ case NI_GPCT_LOGIC_LOW_GATE_SELECT:
+ ni_660x_second_gate_select =
+ selected_second_gate & selected_second_gate_mask;
+ break;
+ case NI_GPCT_NEXT_SOURCE_GATE_SELECT:
+ ni_660x_second_gate_select =
+ NI_660x_Next_SRC_Second_Gate_Select;
+ break;
+ default:
+ for (i = 0; i <= ni_660x_max_rtsi_channel; ++i) {
+ if (selected_second_gate == NI_GPCT_RTSI_GATE_SELECT(i)) {
+ ni_660x_second_gate_select =
+ selected_second_gate &
+ selected_second_gate_mask;
+ break;
+ }
+ }
+ if (i <= ni_660x_max_rtsi_channel)
+ break;
+ for (i = 0; i <= ni_660x_max_up_down_pin; ++i) {
+ if (selected_second_gate ==
+ NI_GPCT_UP_DOWN_PIN_GATE_SELECT(i)) {
+ ni_660x_second_gate_select =
+ selected_second_gate &
+ selected_second_gate_mask;
+ break;
+ }
+ }
+ if (i <= ni_660x_max_up_down_pin)
+ break;
+ return -EINVAL;
+ break;
+ };
+ counter_dev->regs[second_gate_reg] |= Gi_Second_Gate_Mode_Bit;
+ counter_dev->regs[second_gate_reg] &= ~Gi_Second_Gate_Select_Mask;
+ counter_dev->regs[second_gate_reg] |=
+ Gi_Second_Gate_Select_Bits(ni_660x_second_gate_select);
+ write_register(counter, counter_dev->regs[second_gate_reg],
+ second_gate_reg);
+ return 0;
+}
+
+static int ni_m_series_set_second_gate(struct ni_gpct *counter,
+ unsigned int gate_source)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+ const unsigned second_gate_reg =
+ NITIO_Gi_Second_Gate_Reg(counter->counter_index);
+ const unsigned selected_second_gate = CR_CHAN(gate_source);
+ /* bits of second_gate that may be meaningful to second gate register */
+ static const unsigned selected_second_gate_mask = 0x1f;
+ unsigned ni_m_series_second_gate_select;
+
+ /* FIXME: We don't know what the m-series second gate codes are, so we'll just pass
+ the bits through for now. */
+ switch (selected_second_gate) {
+ default:
+ ni_m_series_second_gate_select =
+ selected_second_gate & selected_second_gate_mask;
+ break;
+ };
+ counter_dev->regs[second_gate_reg] |= Gi_Second_Gate_Mode_Bit;
+ counter_dev->regs[second_gate_reg] &= ~Gi_Second_Gate_Select_Mask;
+ counter_dev->regs[second_gate_reg] |=
+ Gi_Second_Gate_Select_Bits(ni_m_series_second_gate_select);
+ write_register(counter, counter_dev->regs[second_gate_reg],
+ second_gate_reg);
+ return 0;
+}
+
+int ni_tio_set_gate_src(struct ni_gpct *counter, unsigned gate_index,
+ unsigned int gate_source)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+ const unsigned second_gate_reg =
+ NITIO_Gi_Second_Gate_Reg(counter->counter_index);
+
+ switch (gate_index) {
+ case 0:
+ if (CR_CHAN(gate_source) == NI_GPCT_DISABLED_GATE_SELECT) {
+ ni_tio_set_bits(counter,
+ NITIO_Gi_Mode_Reg(counter->counter_index),
+ Gi_Gating_Mode_Mask, Gi_Gating_Disabled_Bits);
+ return 0;
+ }
+ ni_tio_set_first_gate_modifiers(counter, gate_source);
+ switch (counter_dev->variant) {
+ case ni_gpct_variant_e_series:
+ case ni_gpct_variant_m_series:
+ return ni_m_series_set_first_gate(counter, gate_source);
+ break;
+ case ni_gpct_variant_660x:
+ return ni_660x_set_first_gate(counter, gate_source);
+ break;
+ default:
+ BUG();
+ break;
+ }
+ break;
+ case 1:
+ if (ni_tio_second_gate_registers_present(counter_dev) == 0)
+ return -EINVAL;
+ if (CR_CHAN(gate_source) == NI_GPCT_DISABLED_GATE_SELECT) {
+ counter_dev->regs[second_gate_reg] &=
+ ~Gi_Second_Gate_Mode_Bit;
+ write_register(counter,
+ counter_dev->regs[second_gate_reg],
+ second_gate_reg);
+ return 0;
+ }
+ if (gate_source & CR_INVERT) {
+ counter_dev->regs[second_gate_reg] |=
+ Gi_Second_Gate_Polarity_Bit;
+ } else {
+ counter_dev->regs[second_gate_reg] &=
+ ~Gi_Second_Gate_Polarity_Bit;
+ }
+ switch (counter_dev->variant) {
+ case ni_gpct_variant_m_series:
+ return ni_m_series_set_second_gate(counter,
+ gate_source);
+ break;
+ case ni_gpct_variant_660x:
+ return ni_660x_set_second_gate(counter, gate_source);
+ break;
+ default:
+ BUG();
+ break;
+ }
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+ return 0;
+}
+
+static int ni_tio_set_other_src(struct ni_gpct *counter, unsigned index,
+ unsigned int source)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+
+ if (counter_dev->variant == ni_gpct_variant_m_series) {
+ unsigned int abz_reg, shift, mask;
+
+ abz_reg = NITIO_Gi_ABZ_Reg(counter->counter_index);
+ switch (index) {
+ case NI_GPCT_SOURCE_ENCODER_A:
+ shift = 10;
+ break;
+ case NI_GPCT_SOURCE_ENCODER_B:
+ shift = 5;
+ break;
+ case NI_GPCT_SOURCE_ENCODER_Z:
+ shift = 0;
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+ mask = 0x1f << shift;
+ if (source > 0x1f) {
+ /* Disable gate */
+ source = 0x1f;
+ }
+ counter_dev->regs[abz_reg] &= ~mask;
+ counter_dev->regs[abz_reg] |= (source << shift) & mask;
+ write_register(counter, counter_dev->regs[abz_reg], abz_reg);
+// rt_printk("%s %x %d %d\n", __FUNCTION__, counter_dev->regs[abz_reg], index, source);
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static unsigned ni_660x_first_gate_to_generic_gate_source(unsigned
+ ni_660x_gate_select)
+{
+ unsigned i;
+
+ switch (ni_660x_gate_select) {
+ case NI_660x_Source_Pin_i_Gate_Select:
+ return NI_GPCT_SOURCE_PIN_i_GATE_SELECT;
+ break;
+ case NI_660x_Gate_Pin_i_Gate_Select:
+ return NI_GPCT_GATE_PIN_i_GATE_SELECT;
+ break;
+ case NI_660x_Next_SRC_Gate_Select:
+ return NI_GPCT_NEXT_SOURCE_GATE_SELECT;
+ break;
+ case NI_660x_Next_Out_Gate_Select:
+ return NI_GPCT_NEXT_OUT_GATE_SELECT;
+ break;
+ case NI_660x_Logic_Low_Gate_Select:
+ return NI_GPCT_LOGIC_LOW_GATE_SELECT;
+ break;
+ default:
+ for (i = 0; i <= ni_660x_max_rtsi_channel; ++i) {
+ if (ni_660x_gate_select == NI_660x_RTSI_Gate_Select(i)) {
+ return NI_GPCT_RTSI_GATE_SELECT(i);
+ break;
+ }
+ }
+ if (i <= ni_660x_max_rtsi_channel)
+ break;
+ for (i = 0; i <= ni_660x_max_gate_pin; ++i) {
+ if (ni_660x_gate_select ==
+ NI_660x_Gate_Pin_Gate_Select(i)) {
+ return NI_GPCT_GATE_PIN_GATE_SELECT(i);
+ break;
+ }
+ }
+ if (i <= ni_660x_max_gate_pin)
+ break;
+ BUG();
+ break;
+ }
+ return 0;
+};
+
+static unsigned ni_m_series_first_gate_to_generic_gate_source(unsigned
+ ni_m_series_gate_select)
+{
+ unsigned i;
+
+ switch (ni_m_series_gate_select) {
+ case NI_M_Series_Timestamp_Mux_Gate_Select:
+ return NI_GPCT_TIMESTAMP_MUX_GATE_SELECT;
+ break;
+ case NI_M_Series_AI_START2_Gate_Select:
+ return NI_GPCT_AI_START2_GATE_SELECT;
+ break;
+ case NI_M_Series_PXI_Star_Trigger_Gate_Select:
+ return NI_GPCT_PXI_STAR_TRIGGER_GATE_SELECT;
+ break;
+ case NI_M_Series_Next_Out_Gate_Select:
+ return NI_GPCT_NEXT_OUT_GATE_SELECT;
+ break;
+ case NI_M_Series_AI_START1_Gate_Select:
+ return NI_GPCT_AI_START1_GATE_SELECT;
+ break;
+ case NI_M_Series_Next_SRC_Gate_Select:
+ return NI_GPCT_NEXT_SOURCE_GATE_SELECT;
+ break;
+ case NI_M_Series_Analog_Trigger_Out_Gate_Select:
+ return NI_GPCT_ANALOG_TRIGGER_OUT_GATE_SELECT;
+ break;
+ case NI_M_Series_Logic_Low_Gate_Select:
+ return NI_GPCT_LOGIC_LOW_GATE_SELECT;
+ break;
+ default:
+ for (i = 0; i <= ni_m_series_max_rtsi_channel; ++i) {
+ if (ni_m_series_gate_select ==
+ NI_M_Series_RTSI_Gate_Select(i)) {
+ return NI_GPCT_RTSI_GATE_SELECT(i);
+ break;
+ }
+ }
+ if (i <= ni_m_series_max_rtsi_channel)
+ break;
+ for (i = 0; i <= ni_m_series_max_pfi_channel; ++i) {
+ if (ni_m_series_gate_select ==
+ NI_M_Series_PFI_Gate_Select(i)) {
+ return NI_GPCT_PFI_GATE_SELECT(i);
+ break;
+ }
+ }
+ if (i <= ni_m_series_max_pfi_channel)
+ break;
+ BUG();
+ break;
+ }
+ return 0;
+};
+
+static unsigned ni_660x_second_gate_to_generic_gate_source(unsigned
+ ni_660x_gate_select)
+{
+ unsigned i;
+
+ switch (ni_660x_gate_select) {
+ case NI_660x_Source_Pin_i_Second_Gate_Select:
+ return NI_GPCT_SOURCE_PIN_i_GATE_SELECT;
+ break;
+ case NI_660x_Up_Down_Pin_i_Second_Gate_Select:
+ return NI_GPCT_UP_DOWN_PIN_i_GATE_SELECT;
+ break;
+ case NI_660x_Next_SRC_Second_Gate_Select:
+ return NI_GPCT_NEXT_SOURCE_GATE_SELECT;
+ break;
+ case NI_660x_Next_Out_Second_Gate_Select:
+ return NI_GPCT_NEXT_OUT_GATE_SELECT;
+ break;
+ case NI_660x_Selected_Gate_Second_Gate_Select:
+ return NI_GPCT_SELECTED_GATE_GATE_SELECT;
+ break;
+ case NI_660x_Logic_Low_Second_Gate_Select:
+ return NI_GPCT_LOGIC_LOW_GATE_SELECT;
+ break;
+ default:
+ for (i = 0; i <= ni_660x_max_rtsi_channel; ++i) {
+ if (ni_660x_gate_select ==
+ NI_660x_RTSI_Second_Gate_Select(i)) {
+ return NI_GPCT_RTSI_GATE_SELECT(i);
+ break;
+ }
+ }
+ if (i <= ni_660x_max_rtsi_channel)
+ break;
+ for (i = 0; i <= ni_660x_max_up_down_pin; ++i) {
+ if (ni_660x_gate_select ==
+ NI_660x_Up_Down_Pin_Second_Gate_Select(i)) {
+ return NI_GPCT_UP_DOWN_PIN_GATE_SELECT(i);
+ break;
+ }
+ }
+ if (i <= ni_660x_max_up_down_pin)
+ break;
+ BUG();
+ break;
+ }
+ return 0;
+};
+
+static unsigned ni_m_series_second_gate_to_generic_gate_source(unsigned
+ ni_m_series_gate_select)
+{
+ /*FIXME: the second gate sources for the m series are undocumented, so we just return
+ * the raw bits for now. */
+ switch (ni_m_series_gate_select) {
+ default:
+ return ni_m_series_gate_select;
+ break;
+ }
+ return 0;
+};
+
+static int ni_tio_get_gate_src(struct ni_gpct *counter, unsigned gate_index,
+ unsigned int * gate_source)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+ const unsigned mode_bits = ni_tio_get_soft_copy(counter,
+ NITIO_Gi_Mode_Reg(counter->counter_index));
+ const unsigned second_gate_reg =
+ NITIO_Gi_Second_Gate_Reg(counter->counter_index);
+ unsigned gate_select_bits;
+
+ switch (gate_index) {
+ case 0:
+ if ((mode_bits & Gi_Gating_Mode_Mask) ==
+ Gi_Gating_Disabled_Bits) {
+ *gate_source = NI_GPCT_DISABLED_GATE_SELECT;
+ return 0;
+ } else {
+ gate_select_bits =
+ (ni_tio_get_soft_copy(counter,
+ NITIO_Gi_Input_Select_Reg(counter->
+ counter_index)) &
+ Gi_Gate_Select_Mask) >> Gi_Gate_Select_Shift;
+ }
+ switch (counter_dev->variant) {
+ case ni_gpct_variant_e_series:
+ case ni_gpct_variant_m_series:
+ *gate_source =
+ ni_m_series_first_gate_to_generic_gate_source
+ (gate_select_bits);
+ break;
+ case ni_gpct_variant_660x:
+ *gate_source =
+ ni_660x_first_gate_to_generic_gate_source
+ (gate_select_bits);
+ break;
+ default:
+ BUG();
+ break;
+ }
+ if (mode_bits & Gi_Gate_Polarity_Bit) {
+ *gate_source |= CR_INVERT;
+ }
+ if ((mode_bits & Gi_Gating_Mode_Mask) != Gi_Level_Gating_Bits) {
+ *gate_source |= CR_EDGE;
+ }
+ break;
+ case 1:
+ if ((mode_bits & Gi_Gating_Mode_Mask) == Gi_Gating_Disabled_Bits
+ || (counter_dev->
+ regs[second_gate_reg] & Gi_Second_Gate_Mode_Bit)
+ == 0) {
+ *gate_source = NI_GPCT_DISABLED_GATE_SELECT;
+ return 0;
+ } else {
+ gate_select_bits =
+ (counter_dev->
+ regs[second_gate_reg] &
+ Gi_Second_Gate_Select_Mask) >>
+ Gi_Second_Gate_Select_Shift;
+ }
+ switch (counter_dev->variant) {
+ case ni_gpct_variant_e_series:
+ case ni_gpct_variant_m_series:
+ *gate_source =
+ ni_m_series_second_gate_to_generic_gate_source
+ (gate_select_bits);
+ break;
+ case ni_gpct_variant_660x:
+ *gate_source =
+ ni_660x_second_gate_to_generic_gate_source
+ (gate_select_bits);
+ break;
+ default:
+ BUG();
+ break;
+ }
+ if (counter_dev->
+ regs[second_gate_reg] & Gi_Second_Gate_Polarity_Bit) {
+ *gate_source |= CR_INVERT;
+ }
+ /* second gate can't have edge/level mode set independently */
+ if ((mode_bits & Gi_Gating_Mode_Mask) != Gi_Level_Gating_Bits) {
+ *gate_source |= CR_EDGE;
+ }
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+ return 0;
+}
+
+int ni_tio_insn_config(struct ni_gpct *counter,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ switch (data[0]) {
+ case INSN_CONFIG_SET_COUNTER_MODE:
+ return ni_tio_set_counter_mode(counter, data[1]);
+ break;
+ case INSN_CONFIG_ARM:
+ return ni_tio_arm(counter, 1, data[1]);
+ break;
+ case INSN_CONFIG_DISARM:
+ ni_tio_arm(counter, 0, 0);
+ return 0;
+ break;
+ case INSN_CONFIG_GET_COUNTER_STATUS:
+ data[1] = ni_tio_counter_status(counter);
+ data[2] = counter_status_mask;
+ return 0;
+ break;
+ case INSN_CONFIG_SET_CLOCK_SRC:
+ return ni_tio_set_clock_src(counter, data[1], data[2]);
+ break;
+ case INSN_CONFIG_GET_CLOCK_SRC:
+ ni_tio_get_clock_src(counter, &data[1], &data[2]);
+ return 0;
+ break;
+ case INSN_CONFIG_SET_GATE_SRC:
+ return ni_tio_set_gate_src(counter, data[1], data[2]);
+ break;
+ case INSN_CONFIG_GET_GATE_SRC:
+ return ni_tio_get_gate_src(counter, data[1], &data[2]);
+ break;
+ case INSN_CONFIG_SET_OTHER_SRC:
+ return ni_tio_set_other_src(counter, data[1], data[2]);
+ break;
+ case INSN_CONFIG_RESET:
+ ni_tio_reset_count_and_disarm(counter);
+ return 0;
+ break;
+ default:
+ break;
+ }
+ return -EINVAL;
+}
+
+int ni_tio_rinsn(struct ni_gpct *counter, struct comedi_insn * insn, unsigned int * data)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+ const unsigned channel = CR_CHAN(insn->chanspec);
+ unsigned first_read;
+ unsigned second_read;
+ unsigned correct_read;
+
+ if (insn->n < 1)
+ return 0;
+ switch (channel) {
+ case 0:
+ ni_tio_set_bits(counter,
+ NITIO_Gi_Command_Reg(counter->counter_index),
+ Gi_Save_Trace_Bit, 0);
+ ni_tio_set_bits(counter,
+ NITIO_Gi_Command_Reg(counter->counter_index),
+ Gi_Save_Trace_Bit, Gi_Save_Trace_Bit);
+ /* The count doesn't get latched until the next clock edge, so it is possible the count
+ may change (once) while we are reading. Since the read of the SW_Save_Reg isn't
+ atomic (apparently even when it's a 32 bit register according to 660x docs),
+ we need to read twice and make sure the reading hasn't changed. If it has,
+ a third read will be correct since the count value will definitely have latched by then. */
+ first_read =
+ read_register(counter,
+ NITIO_Gi_SW_Save_Reg(counter->counter_index));
+ second_read =
+ read_register(counter,
+ NITIO_Gi_SW_Save_Reg(counter->counter_index));
+ if (first_read != second_read)
+ correct_read =
+ read_register(counter,
+ NITIO_Gi_SW_Save_Reg(counter->counter_index));
+ else
+ correct_read = first_read;
+ data[0] = correct_read;
+ return 0;
+ break;
+ case 1:
+ data[0] =
+ counter_dev->regs[NITIO_Gi_LoadA_Reg(counter->
+ counter_index)];
+ break;
+ case 2:
+ data[0] =
+ counter_dev->regs[NITIO_Gi_LoadB_Reg(counter->
+ counter_index)];
+ break;
+ };
+ return 0;
+}
+
+static unsigned ni_tio_next_load_register(struct ni_gpct *counter)
+{
+ const unsigned bits = read_register(counter,
+ NITIO_Gxx_Status_Reg(counter->counter_index));
+
+ if (bits & Gi_Next_Load_Source_Bit(counter->counter_index)) {
+ return NITIO_Gi_LoadB_Reg(counter->counter_index);
+ } else {
+ return NITIO_Gi_LoadA_Reg(counter->counter_index);
+ }
+}
+
+int ni_tio_winsn(struct ni_gpct *counter, struct comedi_insn * insn, unsigned int * data)
+{
+ struct ni_gpct_device *counter_dev = counter->counter_dev;
+ const unsigned channel = CR_CHAN(insn->chanspec);
+ unsigned load_reg;
+
+ if (insn->n < 1)
+ return 0;
+ switch (channel) {
+ case 0:
+ /* Unsafe if counter is armed. Should probably check status and return -EBUSY if armed. */
+ /* Don't disturb load source select, just use whichever load register is already selected. */
+ load_reg = ni_tio_next_load_register(counter);
+ write_register(counter, data[0], load_reg);
+ ni_tio_set_bits_transient(counter,
+ NITIO_Gi_Command_Reg(counter->counter_index), 0, 0,
+ Gi_Load_Bit);
+ /* restore state of load reg to whatever the user set last set it to */
+ write_register(counter, counter_dev->regs[load_reg], load_reg);
+ break;
+ case 1:
+ counter_dev->regs[NITIO_Gi_LoadA_Reg(counter->counter_index)] =
+ data[0];
+ write_register(counter, data[0],
+ NITIO_Gi_LoadA_Reg(counter->counter_index));
+ break;
+ case 2:
+ counter_dev->regs[NITIO_Gi_LoadB_Reg(counter->counter_index)] =
+ data[0];
+ write_register(counter, data[0],
+ NITIO_Gi_LoadB_Reg(counter->counter_index));
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ni_tio_rinsn);
+EXPORT_SYMBOL_GPL(ni_tio_winsn);
+EXPORT_SYMBOL_GPL(ni_tio_insn_config);
+EXPORT_SYMBOL_GPL(ni_tio_init_counter);
+EXPORT_SYMBOL_GPL(ni_tio_arm);
+EXPORT_SYMBOL_GPL(ni_tio_set_gate_src);
+EXPORT_SYMBOL_GPL(ni_gpct_device_construct);
+EXPORT_SYMBOL_GPL(ni_gpct_device_destroy);
projects / linux-2.6-omap-h63xx.git / blobdiff