| /** |
| * @file me6000_ao.c |
| * |
| * @brief ME-6000 analog output subdevice instance. |
| * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de) |
| * @author Guenter Gebhardt |
| * @author Krzysztof Gantzke (k.gantzke@meilhaus.de) |
| */ |
| |
| /* |
| * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de) |
| * |
| * This file 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. |
| */ |
| |
| #ifndef __KERNEL__ |
| # define __KERNEL__ |
| #endif |
| |
| /* Includes |
| */ |
| #include <linux/version.h> |
| #include <linux/module.h> |
| |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <asm/io.h> |
| #include <asm/uaccess.h> |
| #include <linux/types.h> |
| #include <linux/interrupt.h> |
| #include <linux/delay.h> |
| |
| #include <linux/workqueue.h> |
| |
| #include "medefines.h" |
| #include "meinternal.h" |
| #include "meerror.h" |
| |
| #include "medebug.h" |
| #include "meids.h" |
| #include "me6000_reg.h" |
| #include "me6000_ao_reg.h" |
| #include "me6000_ao.h" |
| |
| /* Defines |
| */ |
| |
| static int me6000_ao_query_range_by_min_max(me_subdevice_t * subdevice, |
| int unit, |
| int *min, |
| int *max, int *maxdata, int *range); |
| |
| static int me6000_ao_query_number_ranges(me_subdevice_t * subdevice, |
| int unit, int *count); |
| |
| static int me6000_ao_query_range_info(me_subdevice_t * subdevice, |
| int range, |
| int *unit, |
| int *min, int *max, int *maxdata); |
| |
| static int me6000_ao_query_timer(me_subdevice_t * subdevice, |
| int timer, |
| int *base_frequency, |
| long long *min_ticks, long long *max_ticks); |
| |
| static int me6000_ao_query_number_channels(me_subdevice_t * subdevice, |
| int *number); |
| |
| static int me6000_ao_query_subdevice_type(me_subdevice_t * subdevice, |
| int *type, int *subtype); |
| |
| static int me6000_ao_query_subdevice_caps(me_subdevice_t * subdevice, |
| int *caps); |
| |
| static int me6000_ao_query_subdevice_caps_args(struct me_subdevice *subdevice, |
| int cap, int *args, int count); |
| |
| /** Remove subdevice. */ |
| static void me6000_ao_destructor(struct me_subdevice *subdevice); |
| |
| /** Reset subdevice. Stop all actions. Reset registry. Disable FIFO. Set output to 0V and status to 'none'. */ |
| static int me6000_ao_io_reset_subdevice(me_subdevice_t * subdevice, |
| struct file *filep, int flags); |
| |
| /** Set output as single */ |
| static int me6000_ao_io_single_config(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int single_config, |
| int ref, |
| int trig_chan, |
| int trig_type, int trig_edge, int flags); |
| |
| /** Pass to user actual value of output. */ |
| static int me6000_ao_io_single_read(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int *value, int time_out, int flags); |
| |
| /** Write to output requed value. */ |
| static int me6000_ao_io_single_write(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int value, int time_out, int flags); |
| |
| /** Set output as streamed device. */ |
| static int me6000_ao_io_stream_config(me_subdevice_t * subdevice, |
| struct file *filep, |
| meIOStreamConfig_t * config_list, |
| int count, |
| meIOStreamTrigger_t * trigger, |
| int fifo_irq_threshold, int flags); |
| |
| /** Wait for / Check empty space in buffer. */ |
| static int me6000_ao_io_stream_new_values(me_subdevice_t * subdevice, |
| struct file *filep, |
| int time_out, int *count, int flags); |
| |
| /** Start streaming. */ |
| static int me6000_ao_io_stream_start(me_subdevice_t * subdevice, |
| struct file *filep, |
| int start_mode, int time_out, int flags); |
| |
| /** Check actual state. / Wait for end. */ |
| static int me6000_ao_io_stream_status(me_subdevice_t * subdevice, |
| struct file *filep, |
| int wait, |
| int *status, int *values, int flags); |
| |
| /** Stop streaming. */ |
| static int me6000_ao_io_stream_stop(me_subdevice_t * subdevice, |
| struct file *filep, |
| int stop_mode, int flags); |
| |
| /** Write datas to buffor. */ |
| static int me6000_ao_io_stream_write(me_subdevice_t * subdevice, |
| struct file *filep, |
| int write_mode, |
| int *values, int *count, int flags); |
| |
| /** Interrupt handler. Copy from buffer to FIFO. */ |
| #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) |
| static irqreturn_t me6000_ao_isr(int irq, void *dev_id); |
| #else |
| static irqreturn_t me6000_ao_isr(int irq, void *dev_id, struct pt_regs *regs); |
| #endif |
| |
| /** Copy data from circular buffer to fifo (fast) in wraparound mode. */ |
| int inline ao_write_data_wraparound(me6000_ao_subdevice_t * instance, int count, |
| int start_pos); |
| |
| /** Copy data from circular buffer to fifo (fast).*/ |
| int inline ao_write_data(me6000_ao_subdevice_t * instance, int count, |
| int start_pos); |
| |
| /** Copy data from circular buffer to fifo (slow).*/ |
| int inline ao_write_data_pooling(me6000_ao_subdevice_t * instance, int count, |
| int start_pos); |
| |
| /** Copy data from user space to circular buffer. */ |
| int inline ao_get_data_from_user(me6000_ao_subdevice_t * instance, int count, |
| int *user_values); |
| |
| /** Stop presentation. Preserve FIFOs. */ |
| int inline ao_stop_immediately(me6000_ao_subdevice_t * instance); |
| |
| /** Function for checking timeout in non-blocking mode. */ |
| #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) |
| static void me6000_ao_work_control_task(void *subdevice); |
| #else |
| static void me6000_ao_work_control_task(struct work_struct *work); |
| #endif |
| |
| /* Functions |
| */ |
| |
| static int me6000_ao_io_reset_subdevice(me_subdevice_t * subdevice, |
| struct file *filep, int flags) |
| { |
| me6000_ao_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| uint32_t tmp; |
| uint32_t ctrl; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if (flags) { |
| PERROR("Invalid flag specified.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| ME_SUBDEVICE_ENTER; |
| |
| instance->status = ao_status_none; |
| instance->ao_control_task_flag = 0; |
| cancel_delayed_work(&instance->ao_control_task); |
| instance->timeout.delay = 0; |
| instance->timeout.start_time = jiffies; |
| |
| //Stop state machine. |
| err = ao_stop_immediately(instance); |
| |
| //Remove from synchronous start. |
| spin_lock(instance->preload_reg_lock); |
| tmp = inl(instance->preload_reg); |
| tmp &= |
| ~((ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG) << instance-> |
| ao_idx); |
| outl(tmp, instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->preload_reg - instance->reg_base, tmp); |
| *instance->preload_flags &= |
| ~((ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG) << instance-> |
| ao_idx); |
| |
| //Reset triggering flag |
| *instance->triggering_flags &= ~(0x1 << instance->ao_idx); |
| spin_unlock(instance->preload_reg_lock); |
| |
| if (instance->fifo) { |
| //Set single mode, dissable FIFO, dissable external trigger, block interrupt. |
| ctrl = ME6000_AO_MODE_SINGLE; |
| |
| //Block ISM. |
| ctrl |= |
| (ME6000_AO_CTRL_BIT_STOP | |
| ME6000_AO_CTRL_BIT_IMMEDIATE_STOP); |
| |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, ctrl); |
| //Set speed |
| outl(ME6000_AO_MIN_CHAN_TICKS - 1, instance->timer_reg); |
| //Reset interrupt latch |
| inl(instance->irq_reset_reg); |
| } |
| |
| instance->hardware_stop_delay = HZ / 10; //100ms |
| |
| //Set output to 0V |
| outl(0x8000, instance->single_reg); |
| PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->single_reg - instance->reg_base, 0x8000); |
| |
| instance->circ_buf.head = 0; |
| instance->circ_buf.tail = 0; |
| instance->preloaded_count = 0; |
| instance->data_count = 0; |
| instance->single_value = 0x8000; |
| instance->single_value_in_fifo = 0x8000; |
| |
| //Set status to signal that device is unconfigured. |
| instance->status = ao_status_none; |
| //Signal reset if user is on wait. |
| wake_up_interruptible_all(&instance->wait_queue); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me6000_ao_io_single_config(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int single_config, |
| int ref, |
| int trig_chan, |
| int trig_type, int trig_edge, int flags) |
| { |
| me6000_ao_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| uint32_t ctrl; |
| uint32_t sync; |
| unsigned long cpu_flags; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. ID=%d\n", instance->ao_idx); |
| |
| // Checking parameters |
| if (flags) { |
| PERROR |
| ("Invalid flag specified. Must be ME_IO_SINGLE_CONFIG_NO_FLAGS.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if (instance->fifo) { //Stream hardware (with or without fifo) |
| if ((trig_edge == ME_TRIG_TYPE_SW) |
| && (trig_edge != ME_TRIG_EDGE_NONE)) { |
| PERROR |
| ("Invalid trigger edge. Software trigger has not edge.\n"); |
| return ME_ERRNO_INVALID_TRIG_EDGE; |
| } |
| |
| if (trig_type == ME_TRIG_TYPE_EXT_DIGITAL) { |
| switch (trig_edge) { |
| case ME_TRIG_EDGE_ANY: |
| case ME_TRIG_EDGE_RISING: |
| case ME_TRIG_EDGE_FALLING: |
| break; |
| |
| default: |
| PERROR("Invalid trigger edge.\n"); |
| return ME_ERRNO_INVALID_TRIG_EDGE; |
| } |
| } |
| |
| if ((trig_type != ME_TRIG_TYPE_SW) |
| && (trig_type != ME_TRIG_TYPE_EXT_DIGITAL)) { |
| PERROR |
| ("Invalid trigger type. Trigger must be software or digital.\n"); |
| return ME_ERRNO_INVALID_TRIG_TYPE; |
| } |
| } else { //Single |
| if (trig_edge != ME_TRIG_EDGE_NONE) { |
| PERROR |
| ("Invalid trigger edge. Single output trigger hasn't own edge.\n"); |
| return ME_ERRNO_INVALID_TRIG_EDGE; |
| } |
| |
| if (trig_type != ME_TRIG_TYPE_SW) { |
| PERROR |
| ("Invalid trigger type. Trigger must be software.\n"); |
| return ME_ERRNO_INVALID_TRIG_TYPE; |
| } |
| |
| } |
| |
| if ((trig_chan != ME_TRIG_CHAN_DEFAULT) |
| && (trig_chan != ME_TRIG_CHAN_SYNCHRONOUS)) { |
| PERROR("Invalid trigger channel specified.\n"); |
| return ME_ERRNO_INVALID_TRIG_CHAN; |
| } |
| /* |
| if ((trig_type == ME_TRIG_TYPE_EXT_DIGITAL) && (trig_chan != ME_TRIG_CHAN_SYNCHRONOUS)) |
| { |
| PERROR("Invalid trigger channel specified. Must be synchronous when digital is choose.\n"); |
| return ME_ERRNO_INVALID_TRIG_CHAN; |
| } |
| */ |
| if (ref != ME_REF_AO_GROUND) { |
| PERROR |
| ("Invalid reference. Analog outputs have to have got REF_AO_GROUND.\n"); |
| return ME_ERRNO_INVALID_REF; |
| } |
| |
| if (single_config != 0) { |
| PERROR |
| ("Invalid single config specified. Only one range for anlog outputs is available.\n"); |
| return ME_ERRNO_INVALID_SINGLE_CONFIG; |
| } |
| |
| if (channel != 0) { |
| PERROR |
| ("Invalid channel number specified. Analog output have only one channel.\n"); |
| return ME_ERRNO_INVALID_CHANNEL; |
| } |
| |
| ME_SUBDEVICE_ENTER; |
| |
| //Subdevice running in stream mode! |
| if ((instance->status >= ao_status_stream_run_wait) |
| && (instance->status < ao_status_stream_end)) { |
| PERROR("Subdevice is busy.\n"); |
| ME_SUBDEVICE_EXIT; |
| |
| return ME_ERRNO_SUBDEVICE_BUSY; |
| } |
| /// @note For single all calls (config and write) are erasing previous state! |
| |
| instance->status = ao_status_none; |
| |
| // Correct single mirrors |
| instance->single_value_in_fifo = instance->single_value; |
| |
| //Stop device |
| err = ao_stop_immediately(instance); |
| if (err) { |
| PERROR_CRITICAL("FSM IS BUSY!\n"); |
| ME_SUBDEVICE_EXIT; |
| |
| return ME_ERRNO_SUBDEVICE_BUSY; |
| } |
| |
| if (instance->fifo) { // Set control register. |
| spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| // Set stop bit. Stop streaming mode (If running.). |
| ctrl = inl(instance->ctrl_reg); |
| //Reset all bits. |
| ctrl = |
| ME6000_AO_CTRL_BIT_IMMEDIATE_STOP | ME6000_AO_CTRL_BIT_STOP; |
| if (trig_type == ME_TRIG_TYPE_EXT_DIGITAL) { |
| PINFO("External digital trigger.\n"); |
| |
| if (trig_edge == ME_TRIG_EDGE_ANY) { |
| // ctrl |= ME6000_AO_CTRL_BIT_EX_TRIG_EDGE | ME6000_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH; |
| instance->ctrl_trg = |
| ME6000_AO_CTRL_BIT_EX_TRIG_EDGE | |
| ME6000_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH; |
| } else if (trig_edge == ME_TRIG_EDGE_FALLING) { |
| // ctrl |= ME6000_AO_CTRL_BIT_EX_TRIG_EDGE; |
| instance->ctrl_trg = |
| ME6000_AO_CTRL_BIT_EX_TRIG_EDGE; |
| } else if (trig_edge == ME_TRIG_EDGE_RISING) { |
| instance->ctrl_trg = 0x0; |
| } |
| } else if (trig_type == ME_TRIG_TYPE_SW) { |
| PDEBUG("SOFTWARE TRIGGER\n"); |
| instance->ctrl_trg = 0x0; |
| } |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, ctrl); |
| spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags); |
| } else { |
| PDEBUG("SOFTWARE TRIGGER\n"); |
| } |
| |
| // Set preload/synchronization register. |
| spin_lock(instance->preload_reg_lock); |
| |
| if (trig_type == ME_TRIG_TYPE_SW) { |
| *instance->preload_flags &= |
| ~(ME6000_AO_SYNC_EXT_TRIG << instance->ao_idx); |
| } else //if (trig_type == ME_TRIG_TYPE_EXT_DIGITAL) |
| { |
| *instance->preload_flags |= |
| ME6000_AO_SYNC_EXT_TRIG << instance->ao_idx; |
| } |
| |
| if (trig_chan == ME_TRIG_CHAN_DEFAULT) { |
| *instance->preload_flags &= |
| ~(ME6000_AO_SYNC_HOLD << instance->ao_idx); |
| } else //if (trig_chan == ME_TRIG_CHAN_SYNCHRONOUS) |
| { |
| *instance->preload_flags |= |
| ME6000_AO_SYNC_HOLD << instance->ao_idx; |
| } |
| |
| //Reset hardware register |
| sync = inl(instance->preload_reg); |
| PDEBUG_REG("preload_reg inl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->preload_reg - instance->reg_base, sync); |
| sync &= ~(ME6000_AO_SYNC_EXT_TRIG << instance->ao_idx); |
| sync |= ME6000_AO_SYNC_HOLD << instance->ao_idx; |
| |
| //Output configured in default mode (safe one) |
| outl(sync, instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->preload_reg - instance->reg_base, sync); |
| spin_unlock(instance->preload_reg_lock); |
| |
| instance->status = ao_status_single_configured; |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me6000_ao_io_single_read(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int *value, int time_out, int flags) |
| { |
| me6000_ao_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| |
| unsigned long j; |
| unsigned long delay = 0; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if (flags & ~ME_IO_SINGLE_NONBLOCKING) { |
| PERROR("Invalid flag specified. %d\n", flags); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if ((instance->status >= ao_status_stream_configured) |
| && (instance->status <= ao_status_stream_end)) { |
| PERROR("Subdevice not configured to work in single mode!\n"); |
| return ME_ERRNO_PREVIOUS_CONFIG; |
| } |
| |
| if (channel != 0) { |
| PERROR("Invalid channel number specified.\n"); |
| return ME_ERRNO_INVALID_CHANNEL; |
| } |
| |
| if (time_out < 0) { |
| PERROR("Invalid timeout specified.\n"); |
| return ME_ERRNO_INVALID_TIMEOUT; |
| } |
| |
| ME_SUBDEVICE_ENTER; |
| if ((!flags) && (instance->status == ao_status_single_run_wait)) { //Blocking mode. Wait for trigger. |
| if (time_out) { |
| delay = (time_out * HZ) / 1000; |
| if (delay == 0) |
| delay = 1; |
| } |
| |
| j = jiffies; |
| |
| //Only runing process will interrupt this call. Events are signaled when status change. This procedure has own timeout. |
| wait_event_interruptible_timeout(instance->wait_queue, |
| (instance->status != |
| ao_status_single_run_wait), |
| (delay) ? delay : LONG_MAX); |
| |
| if (instance->status == ao_status_none) { |
| PDEBUG("Single canceled.\n"); |
| err = ME_ERRNO_CANCELLED; |
| } |
| |
| if (signal_pending(current)) { |
| PERROR("Wait on start of state machine interrupted.\n"); |
| instance->status = ao_status_none; |
| ao_stop_immediately(instance); |
| err = ME_ERRNO_SIGNAL; |
| } |
| |
| if ((delay) && ((jiffies - j) >= delay)) { |
| PDEBUG("Timeout reached.\n"); |
| err = ME_ERRNO_TIMEOUT; |
| } |
| |
| *value = |
| (!err) ? instance->single_value_in_fifo : instance-> |
| single_value; |
| } else { //Non-blocking mode |
| //Read value |
| *value = instance->single_value; |
| } |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me6000_ao_io_single_write(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int value, int time_out, int flags) |
| { |
| me6000_ao_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| unsigned long cpu_flags; |
| unsigned long j; |
| unsigned long delay = 0; |
| |
| uint32_t sync_mask; |
| uint32_t mode; |
| |
| uint32_t tmp; |
| |
| /// Workaround for mix-mode - begin |
| uint32_t ctrl = 0x0; |
| uint32_t status; |
| /// Workaround for mix-mode - end |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if (flags & |
| ~(ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS | |
| ME_IO_SINGLE_TYPE_WRITE_NONBLOCKING)) { |
| PERROR("Invalid flag specified.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if ((instance->status == ao_status_none) |
| || (instance->status > ao_status_single_end)) { |
| PERROR("Subdevice not configured to work in single mode!\n"); |
| return ME_ERRNO_PREVIOUS_CONFIG; |
| } |
| |
| if (channel != 0) { |
| PERROR("Invalid channel number specified.\n"); |
| return ME_ERRNO_INVALID_CHANNEL; |
| } |
| |
| if (value & ~ME6000_AO_MAX_DATA) { |
| PERROR("Invalid value provided.\n"); |
| return ME_ERRNO_VALUE_OUT_OF_RANGE; |
| } |
| |
| if (time_out < 0) { |
| PERROR("Invalid timeout specified.\n"); |
| return ME_ERRNO_INVALID_TIMEOUT; |
| } |
| |
| ME_SUBDEVICE_ENTER; |
| |
| /// @note For single all calls (config and write) are erasing previous state! |
| |
| //Cancel control task |
| PDEBUG("Cancel control task. idx=%d\n", instance->ao_idx); |
| instance->ao_control_task_flag = 0; |
| cancel_delayed_work(&instance->ao_control_task); |
| |
| // Correct single mirrors |
| instance->single_value_in_fifo = instance->single_value; |
| |
| //Stop device |
| err = ao_stop_immediately(instance); |
| if (err) { |
| PERROR_CRITICAL("FSM IS BUSY!\n"); |
| ME_SUBDEVICE_EXIT; |
| |
| return ME_ERRNO_SUBDEVICE_BUSY; |
| } |
| |
| if (time_out) { |
| delay = (time_out * HZ) / 1000; |
| |
| if (delay == 0) |
| delay = 1; |
| } |
| |
| spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| |
| instance->single_value_in_fifo = value; |
| |
| if (instance->fifo) { |
| ctrl = inl(instance->ctrl_reg); |
| } |
| |
| if (instance->fifo & ME6000_AO_HAS_FIFO) { /// Workaround for mix-mode - begin |
| //Set speed |
| outl(ME6000_AO_MIN_CHAN_TICKS - 1, instance->timer_reg); |
| PDEBUG_REG("timer_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->timer_reg - instance->reg_base, |
| (int)ME6000_AO_MIN_CHAN_TICKS); |
| instance->hardware_stop_delay = HZ / 10; //100ms |
| |
| status = inl(instance->status_reg); |
| |
| //Set the continous mode. |
| ctrl &= ~ME6000_AO_CTRL_MODE_MASK; |
| ctrl |= ME6000_AO_MODE_CONTINUOUS; |
| |
| //Prepare FIFO |
| if (!(ctrl & ME6000_AO_CTRL_BIT_ENABLE_FIFO)) { //FIFO wasn't enabeled. Do it. |
| PINFO("Enableing FIFO.\n"); |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| ctrl |= ME6000_AO_CTRL_BIT_ENABLE_FIFO; |
| } else { //Check if FIFO is empty |
| if (status & ME6000_AO_STATUS_BIT_EF) { //FIFO not empty |
| PINFO("Reseting FIFO.\n"); |
| ctrl &= |
| ~(ME6000_AO_CTRL_BIT_ENABLE_FIFO | |
| ME6000_AO_CTRL_BIT_ENABLE_IRQ); |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - |
| instance->reg_base, ctrl); |
| |
| ctrl |= ME6000_AO_CTRL_BIT_ENABLE_FIFO; |
| } else { //FIFO empty, only interrupt needs to be disabled! |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| } |
| } |
| |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, ctrl); |
| |
| //Reset interrupt latch |
| inl(instance->irq_reset_reg); |
| |
| //Write output - 1 value to FIFO |
| if (instance->ao_idx & 0x1) { |
| outl(value <<= 16, instance->fifo_reg); |
| PDEBUG_REG("fifo_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->fifo_reg - instance->reg_base, |
| value <<= 16); |
| } else { |
| outl(value, instance->fifo_reg); |
| PDEBUG_REG("fifo_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->fifo_reg - instance->reg_base, |
| value); |
| } |
| /// Workaround for mix-mode - end |
| } else { //No FIFO - always in single mode |
| //Write value |
| PDEBUG("Write value\n"); |
| outl(value, instance->single_reg); |
| PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->single_reg - instance->reg_base, value); |
| } |
| |
| mode = *instance->preload_flags >> instance->ao_idx; |
| mode &= (ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG); |
| |
| PINFO("Triggering mode: 0x%08x\n", mode); |
| |
| spin_lock(instance->preload_reg_lock); |
| sync_mask = inl(instance->preload_reg); |
| PDEBUG_REG("preload_reg inl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->preload_reg - instance->reg_base, sync_mask); |
| switch (mode) { |
| case 0: //0x00000000: Individual software |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_EX_TRIG; |
| |
| if (instance->fifo & ME6000_AO_HAS_FIFO) { // FIFO - Continous mode |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_EX_TRIG; |
| if ((sync_mask & ((ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != 0x0) { //Now we can set correct mode. |
| sync_mask &= |
| ~((ME6000_AO_SYNC_EXT_TRIG | |
| ME6000_AO_SYNC_HOLD) << instance-> |
| ao_idx); |
| |
| outl(sync_mask, instance->preload_reg); |
| PDEBUG_REG |
| ("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| sync_mask); |
| } |
| } else { // No FIFO - Single mode: In this case resetting 'ME6000_AO_SYNC_HOLD' will trigger output. |
| if ((sync_mask & ((ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != ME6000_AO_SYNC_HOLD) { //Now we can set correct mode. This is exception. It is set to synchronous and triggered later. |
| sync_mask &= |
| ~(ME6000_AO_SYNC_EXT_TRIG << instance-> |
| ao_idx); |
| sync_mask |= |
| ME6000_AO_SYNC_HOLD << instance->ao_idx; |
| |
| outl(sync_mask, instance->preload_reg); |
| PDEBUG_REG |
| ("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| sync_mask); |
| } |
| } |
| instance->single_value = value; |
| break; |
| |
| case ME6000_AO_SYNC_EXT_TRIG: //0x00010000: Individual hardware |
| PDEBUG("DIGITAL TRIGGER\n"); |
| ctrl |= ME6000_AO_CTRL_BIT_ENABLE_EX_TRIG; |
| |
| if (instance->fifo & ME6000_AO_HAS_FIFO) { // FIFO - Continous mode |
| if ((sync_mask & ((ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != 0x0) { //Now we can set correct mode. |
| sync_mask &= |
| ~((ME6000_AO_SYNC_EXT_TRIG | |
| ME6000_AO_SYNC_HOLD) << instance-> |
| ao_idx); |
| |
| outl(sync_mask, instance->preload_reg); |
| PDEBUG_REG |
| ("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| sync_mask); |
| } |
| } else { // No FIFO - Single mode |
| if ((sync_mask & |
| ((ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG) << |
| instance->ao_idx)) != ME6000_AO_SYNC_HOLD) { |
| //Now we can set correct mode |
| sync_mask &= |
| ~(ME6000_AO_SYNC_EXT_TRIG << instance-> |
| ao_idx); |
| sync_mask |= |
| ME6000_AO_SYNC_HOLD << instance->ao_idx; |
| |
| outl(sync_mask, instance->preload_reg); |
| PDEBUG_REG |
| ("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| sync_mask); |
| } |
| } |
| break; |
| |
| case ME6000_AO_SYNC_HOLD: //0x00000001: Synchronous software |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_EX_TRIG; |
| |
| if ((sync_mask & |
| ((ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG) << |
| instance->ao_idx)) != |
| (ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG)) { |
| //Now we can set correct mode |
| sync_mask |= |
| ME6000_AO_SYNC_EXT_TRIG << instance->ao_idx; |
| sync_mask |= ME6000_AO_SYNC_HOLD << instance->ao_idx; |
| outl(sync_mask, instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| sync_mask); |
| } |
| //Set triggering flag |
| *instance->triggering_flags |= 0x1 << instance->ao_idx; |
| break; |
| |
| case (ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG): //0x00010001: Synchronous hardware |
| PDEBUG("DIGITAL TRIGGER\n"); |
| ctrl |= ME6000_AO_CTRL_BIT_ENABLE_EX_TRIG; |
| |
| if ((sync_mask & |
| ((ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG) << |
| instance->ao_idx)) != |
| (ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG)) { |
| //Now we can set correct mode |
| sync_mask |= |
| (ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG) << |
| instance->ao_idx; |
| outl(sync_mask, instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| sync_mask); |
| } |
| //Set triggering flag |
| *instance->triggering_flags |= 0x1 << instance->ao_idx; |
| break; |
| } |
| // spin_unlock(instance->preload_reg_lock); // Moved down. |
| |
| if (instance->fifo) { //Activate ISM (remove 'stop' bits) |
| ctrl &= |
| ~(ME6000_AO_CTRL_BIT_EX_TRIG_EDGE | |
| ME6000_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH); |
| ctrl |= instance->ctrl_trg; |
| ctrl &= |
| ~(ME6000_AO_CTRL_BIT_STOP | |
| ME6000_AO_CTRL_BIT_IMMEDIATE_STOP); |
| |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, ctrl); |
| } |
| spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags); |
| |
| /// @note When flag 'ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS' is set than output is triggered. ALWAYS! |
| |
| PINFO("<%s> start mode= 0x%08x %s\n", __func__, mode, |
| (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) ? "SYNCHRONOUS" : |
| ""); |
| if (instance->fifo & ME6000_AO_HAS_FIFO) { // FIFO - Continous mode |
| if (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) { //Trigger outputs |
| //Add channel to start list |
| outl(sync_mask | |
| (ME6000_AO_SYNC_HOLD << instance->ao_idx), |
| instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| sync_mask | (ME6000_AO_SYNC_HOLD << |
| instance->ao_idx)); |
| |
| //Fire |
| PINFO |
| ("Fired all software synchronous outputs by software trigger.\n"); |
| outl(0x8000, instance->single_reg); |
| PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->single_reg - instance->reg_base, |
| 0x8000); |
| |
| //Restore save settings |
| outl(sync_mask, instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| sync_mask); |
| |
| } else if (!mode) { //Trigger outputs |
| /* //Remove channel from start list |
| outl(sync_mask & ~(ME6000_AO_SYNC_HOLD << instance->ao_idx), instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, instance->preload_reg - instance->reg_base, sync_mask & ~(ME6000_AO_SYNC_HOLD << instance->ao_idx)); |
| */ |
| //Fire |
| PINFO("Software trigger.\n"); |
| outl(0x8000, instance->single_reg); |
| PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->single_reg - instance->reg_base, |
| 0x8000); |
| |
| /* //Restore save settings |
| outl(sync_mask, instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, instance->preload_reg - instance->reg_base, sync_mask); |
| */ |
| } |
| /// @note This is mix-mode case. For now I do not have possibility to trigger first 4 channels (continous mode) and other (single) ones at once. |
| /// @note Because triggering is not working it can not be add to synchronous list. First 4 channels don't need this information, anyway. |
| *instance->triggering_flags &= 0xFFFFFFF0; |
| } else { // No FIFO - Single mode |
| if (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) { //Fired all software synchronous outputs. |
| tmp = ~(*instance->preload_flags | 0xFFFF0000); |
| PINFO |
| ("Fired all software synchronous outputs. mask:0x%08x\n", |
| tmp); |
| tmp |= sync_mask & 0xFFFF0000; |
| // Add this channel to list |
| tmp &= ~(ME6000_AO_SYNC_HOLD << instance->ao_idx); |
| |
| //Fire |
| PINFO("Software trigger.\n"); |
| outl(tmp, instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| tmp); |
| |
| //Restore save settings |
| outl(sync_mask, instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| sync_mask); |
| |
| //Set all as triggered. |
| *instance->triggering_flags = 0x0; |
| } else if (!mode) { // Add this channel to list |
| outl(sync_mask & |
| ~(ME6000_AO_SYNC_HOLD << instance->ao_idx), |
| instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| sync_mask & ~(ME6000_AO_SYNC_HOLD << |
| instance->ao_idx)); |
| |
| //Fire |
| PINFO("Software trigger.\n"); |
| |
| //Restore save settings |
| outl(sync_mask, instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| sync_mask); |
| |
| //Set all as triggered. |
| *instance->triggering_flags = 0x0; |
| } |
| |
| } |
| spin_unlock(instance->preload_reg_lock); |
| |
| instance->status = ao_status_single_run_wait; |
| |
| instance->timeout.delay = delay; |
| instance->timeout.start_time = jiffies; |
| instance->ao_control_task_flag = 1; |
| queue_delayed_work(instance->me6000_workqueue, |
| &instance->ao_control_task, 1); |
| |
| if (!(flags & ME_IO_SINGLE_TYPE_WRITE_NONBLOCKING)) { |
| j = jiffies; |
| |
| //Only runing process will interrupt this call. Events are signaled when status change. Extra timeout add for safe reason. |
| wait_event_interruptible_timeout(instance->wait_queue, |
| (instance->status != |
| ao_status_single_run_wait), |
| (delay) ? delay + |
| 1 : LONG_MAX); |
| |
| if (instance->status != ao_status_single_end) { |
| PDEBUG("Single canceled.\n"); |
| err = ME_ERRNO_CANCELLED; |
| } |
| |
| if (signal_pending(current)) { |
| PERROR("Wait on start of state machine interrupted.\n"); |
| instance->ao_control_task_flag = 0; |
| cancel_delayed_work(&instance->ao_control_task); |
| ao_stop_immediately(instance); |
| instance->status = ao_status_none; |
| err = ME_ERRNO_SIGNAL; |
| } |
| |
| if ((delay) && ((jiffies - j) >= delay)) { |
| if (instance->status == ao_status_single_end) { |
| PDEBUG("Timeout reached.\n"); |
| } else if ((jiffies - j) > delay) { |
| PERROR |
| ("Timeout reached. Not handled by control task!\n"); |
| ao_stop_immediately(instance); |
| } else { |
| PERROR |
| ("Timeout reached. Signal come but status is strange: %d\n", |
| instance->status); |
| ao_stop_immediately(instance); |
| } |
| |
| instance->ao_control_task_flag = 0; |
| cancel_delayed_work(&instance->ao_control_task); |
| instance->status = ao_status_single_end; |
| err = ME_ERRNO_TIMEOUT; |
| } |
| } |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me6000_ao_io_stream_config(me_subdevice_t * subdevice, |
| struct file *filep, |
| meIOStreamConfig_t * config_list, |
| int count, |
| meIOStreamTrigger_t * trigger, |
| int fifo_irq_threshold, int flags) |
| { |
| me6000_ao_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| uint32_t ctrl; |
| unsigned long cpu_flags; |
| uint64_t conv_ticks; |
| unsigned int conv_start_ticks_low = trigger->iConvStartTicksLow; |
| unsigned int conv_start_ticks_high = trigger->iConvStartTicksHigh; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if (!(instance->fifo & ME6000_AO_HAS_FIFO)) { |
| PERROR("Not a streaming ao.\n"); |
| return ME_ERRNO_NOT_SUPPORTED; |
| } |
| |
| conv_ticks = |
| (uint64_t) conv_start_ticks_low + |
| ((uint64_t) conv_start_ticks_high << 32); |
| |
| if (flags & |
| ~(ME_IO_STREAM_CONFIG_HARDWARE_ONLY | |
| ME_IO_STREAM_CONFIG_WRAPAROUND)) { |
| PERROR("Invalid flags.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if (flags & ME_IO_STREAM_CONFIG_HARDWARE_ONLY) { |
| if (!flags & ME_IO_STREAM_CONFIG_WRAPAROUND) { |
| PERROR |
| ("Hardware ME_IO_STREAM_CONFIG_HARDWARE_ONLY has to be with ME_IO_STREAM_CONFIG_WRAPAROUND.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if ((trigger->iAcqStopTrigType != ME_TRIG_TYPE_NONE) |
| || (trigger->iScanStopTrigType != ME_TRIG_TYPE_NONE)) { |
| PERROR |
| ("Hardware wraparound mode must be in infinite mode.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| } |
| |
| if (count != 1) { |
| PERROR("Only 1 entry in config list acceptable.\n"); |
| return ME_ERRNO_INVALID_CONFIG_LIST_COUNT; |
| } |
| |
| if (config_list[0].iChannel != 0) { |
| PERROR("Invalid channel number specified.\n"); |
| return ME_ERRNO_INVALID_CHANNEL; |
| } |
| |
| if (config_list[0].iStreamConfig != 0) { |
| PERROR("Only one range available.\n"); |
| return ME_ERRNO_INVALID_STREAM_CONFIG; |
| } |
| |
| if (config_list[0].iRef != ME_REF_AO_GROUND) { |
| PERROR("Output is referenced to ground.\n"); |
| return ME_ERRNO_INVALID_REF; |
| } |
| |
| if ((trigger->iAcqStartTicksLow != 0) |
| || (trigger->iAcqStartTicksHigh != 0)) { |
| PERROR |
| ("Invalid acquisition start trigger argument specified.\n"); |
| return ME_ERRNO_INVALID_ACQ_START_ARG; |
| } |
| |
| if (config_list[0].iFlags) { |
| PERROR("Invalid config list flag.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if ((trigger->iAcqStartTrigType != ME_TRIG_TYPE_SW) |
| && (trigger->iAcqStartTrigType != ME_TRIG_TYPE_EXT_DIGITAL)) { |
| PERROR("Invalid acquisition start trigger type specified.\n"); |
| return ME_ERRNO_INVALID_ACQ_START_TRIG_TYPE; |
| } |
| |
| if (trigger->iAcqStartTrigType == ME_TRIG_TYPE_EXT_DIGITAL) { |
| switch (trigger->iAcqStartTrigEdge) { |
| case ME_TRIG_EDGE_RISING: |
| case ME_TRIG_EDGE_FALLING: |
| case ME_TRIG_EDGE_ANY: |
| break; |
| |
| default: |
| PERROR |
| ("Invalid acquisition start trigger edge specified.\n"); |
| return ME_ERRNO_INVALID_ACQ_START_TRIG_EDGE; |
| } |
| } |
| |
| if ((trigger->iAcqStartTrigType == ME_TRIG_TYPE_SW) |
| && (trigger->iAcqStartTrigEdge != ME_TRIG_TYPE_NONE)) { |
| PERROR("Invalid acquisition start trigger edge specified.\n"); |
| return ME_ERRNO_INVALID_ACQ_START_TRIG_EDGE; |
| } |
| |
| if (trigger->iScanStartTrigType != ME_TRIG_TYPE_FOLLOW) { |
| PERROR("Invalid scan start trigger type specified.\n"); |
| return ME_ERRNO_INVALID_SCAN_START_TRIG_TYPE; |
| } |
| |
| if (trigger->iConvStartTrigType != ME_TRIG_TYPE_TIMER) { |
| PERROR("Invalid conv start trigger type specified.\n"); |
| return ME_ERRNO_INVALID_CONV_START_TRIG_TYPE; |
| } |
| |
| if ((conv_ticks < ME6000_AO_MIN_CHAN_TICKS) |
| || (conv_ticks > ME6000_AO_MAX_CHAN_TICKS)) { |
| PERROR("Invalid conv start trigger argument specified.\n"); |
| return ME_ERRNO_INVALID_CONV_START_ARG; |
| } |
| |
| if (trigger->iAcqStartTicksLow || trigger->iAcqStartTicksHigh) { |
| PERROR("Invalid acq start trigger argument specified.\n"); |
| return ME_ERRNO_INVALID_ACQ_START_ARG; |
| } |
| |
| if (trigger->iScanStartTicksLow || trigger->iScanStartTicksHigh) { |
| PERROR("Invalid scan start trigger argument specified.\n"); |
| return ME_ERRNO_INVALID_SCAN_START_ARG; |
| } |
| |
| switch (trigger->iScanStopTrigType) { |
| case ME_TRIG_TYPE_NONE: |
| if (trigger->iScanStopCount != 0) { |
| PERROR("Invalid scan stop count specified.\n"); |
| return ME_ERRNO_INVALID_SCAN_STOP_ARG; |
| } |
| break; |
| |
| case ME_TRIG_TYPE_COUNT: |
| if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) { |
| if (trigger->iScanStopCount <= 0) { |
| PERROR("Invalid scan stop count specified.\n"); |
| return ME_ERRNO_INVALID_SCAN_STOP_ARG; |
| } |
| } else { |
| PERROR("The continous mode has not 'scan' contects.\n"); |
| return ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE; |
| } |
| break; |
| |
| default: |
| PERROR("Invalid scan stop trigger type specified.\n"); |
| return ME_ERRNO_INVALID_SCAN_STOP_TRIG_TYPE; |
| } |
| |
| switch (trigger->iAcqStopTrigType) { |
| case ME_TRIG_TYPE_NONE: |
| if (trigger->iAcqStopCount != 0) { |
| PERROR("Invalid acq stop count specified.\n"); |
| return ME_ERRNO_INVALID_ACQ_STOP_ARG; |
| } |
| break; |
| |
| case ME_TRIG_TYPE_COUNT: |
| if (trigger->iScanStopTrigType != ME_TRIG_TYPE_NONE) { |
| PERROR("Invalid acq stop trigger type specified.\n"); |
| return ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE; |
| } |
| |
| if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) { |
| if (trigger->iAcqStopCount <= 0) { |
| PERROR |
| ("The continous mode has not 'scan' contects.\n"); |
| return ME_ERRNO_INVALID_ACQ_STOP_ARG; |
| } |
| } |
| // else |
| // { |
| // PERROR("Invalid acq stop trigger type specified.\n"); |
| // return ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE; |
| // } |
| |
| break; |
| |
| default: |
| PERROR("Invalid acq stop trigger type specified.\n"); |
| return ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE; |
| } |
| |
| switch (trigger->iAcqStartTrigChan) { |
| case ME_TRIG_CHAN_DEFAULT: |
| case ME_TRIG_CHAN_SYNCHRONOUS: |
| break; |
| |
| default: |
| PERROR("Invalid acq start trigger channel specified.\n"); |
| return ME_ERRNO_INVALID_ACQ_START_TRIG_CHAN; |
| } |
| |
| ME_SUBDEVICE_ENTER; |
| |
| //Stop device |
| |
| //Cancel control task |
| PDEBUG("Cancel control task. idx=%d\n", instance->ao_idx); |
| instance->ao_control_task_flag = 0; |
| cancel_delayed_work(&instance->ao_control_task); |
| |
| //Check if state machine is stopped. |
| err = ao_stop_immediately(instance); |
| if (err) { |
| PERROR_CRITICAL("FSM IS BUSY!\n"); |
| ME_SUBDEVICE_EXIT; |
| |
| return ME_ERRNO_SUBDEVICE_BUSY; |
| } |
| |
| spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| //Reset control register. Block all actions. Disable IRQ. Disable FIFO. |
| ctrl = ME6000_AO_CTRL_BIT_IMMEDIATE_STOP | ME6000_AO_CTRL_BIT_STOP; |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, ctrl); |
| |
| //Reset interrupt latch |
| inl(instance->irq_reset_reg); |
| |
| //This is paranoic, but to be sure. |
| instance->preloaded_count = 0; |
| instance->data_count = 0; |
| instance->circ_buf.head = 0; |
| instance->circ_buf.tail = 0; |
| |
| /* Set mode. */ |
| if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) { //Wraparound |
| if (flags & ME_IO_STREAM_CONFIG_HARDWARE_ONLY) { //Hardware wraparound |
| PINFO("Hardware wraparound.\n"); |
| ctrl |= ME6000_AO_MODE_WRAPAROUND; |
| instance->mode = ME6000_AO_HW_WRAP_MODE; |
| } else { //Software wraparound |
| PINFO("Software wraparound.\n"); |
| ctrl |= ME6000_AO_MODE_CONTINUOUS; |
| instance->mode = ME6000_AO_SW_WRAP_MODE; |
| } |
| } else { //Continous |
| PINFO("Continous.\n"); |
| ctrl |= ME6000_AO_MODE_CONTINUOUS; |
| instance->mode = ME6000_AO_CONTINOUS; |
| } |
| |
| //Set the trigger edge. |
| if (trigger->iAcqStartTrigType == ME_TRIG_TYPE_EXT_DIGITAL) { //Set the trigger type and edge for external trigger. |
| PINFO("External digital trigger.\n"); |
| instance->start_mode = ME6000_AO_EXT_TRIG; |
| |
| switch (trigger->iAcqStartTrigEdge) { |
| case ME_TRIG_EDGE_RISING: |
| PINFO("Set the trigger edge: rising.\n"); |
| instance->ctrl_trg = 0x0; |
| break; |
| |
| case ME_TRIG_EDGE_FALLING: |
| PINFO("Set the trigger edge: falling.\n"); |
| // ctrl |= ME6000_AO_CTRL_BIT_EX_TRIG_EDGE; |
| instance->ctrl_trg = ME6000_AO_CTRL_BIT_EX_TRIG_EDGE; |
| break; |
| |
| case ME_TRIG_EDGE_ANY: |
| PINFO("Set the trigger edge: both edges.\n"); |
| // ctrl |= ME6000_AO_CTRL_BIT_EX_TRIG_EDGE | ME6000_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH; |
| instance->ctrl_trg = |
| ME6000_AO_CTRL_BIT_EX_TRIG_EDGE | |
| ME6000_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH; |
| break; |
| } |
| } else { |
| PINFO("Internal software trigger.\n"); |
| instance->start_mode = 0; |
| } |
| |
| //Set the stop mode and value. |
| if (trigger->iAcqStopTrigType == ME_TRIG_TYPE_COUNT) { //Amount of data |
| instance->stop_mode = ME6000_AO_ACQ_STOP_MODE; |
| instance->stop_count = trigger->iAcqStopCount; |
| } else if (trigger->iScanStopTrigType == ME_TRIG_TYPE_COUNT) { //Amount of 'scans' |
| instance->stop_mode = ME6000_AO_SCAN_STOP_MODE; |
| instance->stop_count = trigger->iScanStopCount; |
| } else { //Infinite |
| instance->stop_mode = ME6000_AO_INF_STOP_MODE; |
| instance->stop_count = 0; |
| } |
| |
| PINFO("Stop count: %d.\n", instance->stop_count); |
| |
| if (trigger->iAcqStartTrigChan == ME_TRIG_CHAN_SYNCHRONOUS) { //Synchronous start |
| instance->start_mode |= ME6000_AO_SYNC_HOLD; |
| if (trigger->iAcqStartTrigType == ME_TRIG_TYPE_EXT_DIGITAL) { //Externaly triggered |
| PINFO("Synchronous start. Externaly trigger active.\n"); |
| instance->start_mode |= ME6000_AO_SYNC_EXT_TRIG; |
| } |
| #ifdef MEDEBUG_INFO |
| else { |
| PINFO |
| ("Synchronous start. Externaly trigger dissabled.\n"); |
| } |
| #endif |
| |
| } |
| //Set speed |
| outl(conv_ticks - 2, instance->timer_reg); |
| PDEBUG_REG("timer_reg outl(0x%lX+0x%lX)=0x%llx\n", instance->reg_base, |
| instance->timer_reg - instance->reg_base, conv_ticks - 2); |
| instance->hardware_stop_delay = (int)(conv_ticks * HZ) / ME6000_AO_BASE_FREQUENCY; //<== MUST be with cast! |
| |
| // Write the control word |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, ctrl); |
| |
| //Set status. |
| instance->status = ao_status_stream_configured; |
| spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me6000_ao_io_stream_new_values(me_subdevice_t * subdevice, |
| struct file *filep, |
| int time_out, int *count, int flags) |
| { |
| me6000_ao_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| long t = 0; |
| long j; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if (!(instance->fifo & ME6000_AO_HAS_FIFO)) { |
| PERROR("Not a streaming ao.\n"); |
| return ME_ERRNO_NOT_SUPPORTED; |
| } |
| |
| if (flags) { |
| PERROR("Invalid flag specified.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if (!instance->circ_buf.buf) { |
| PERROR("Circular buffer not exists.\n"); |
| return ME_ERRNO_INTERNAL; |
| } |
| |
| if (time_out < 0) { |
| PERROR("Invalid time_out specified.\n"); |
| return ME_ERRNO_INVALID_TIMEOUT; |
| } |
| |
| ME_SUBDEVICE_ENTER; |
| |
| if (me_circ_buf_space(&instance->circ_buf)) { //The buffer is NOT full. |
| *count = me_circ_buf_space(&instance->circ_buf); |
| } else { //The buffer is full. |
| if (time_out) { |
| t = (time_out * HZ) / 1000; |
| |
| if (t == 0) |
| t = 1; |
| } else { //Max time. |
| t = LONG_MAX; |
| } |
| |
| *count = 0; |
| |
| j = jiffies; |
| |
| //Only runing process will interrupt this call. Interrupts are when FIFO HF is signaled. |
| wait_event_interruptible_timeout(instance->wait_queue, |
| ((me_circ_buf_space |
| (&instance->circ_buf)) |
| || !(inl(instance->status_reg) |
| & |
| ME6000_AO_STATUS_BIT_FSM)), |
| t); |
| |
| if (!(inl(instance->status_reg) & ME6000_AO_STATUS_BIT_FSM)) { |
| PERROR("AO subdevice is not running.\n"); |
| err = ME_ERRNO_SUBDEVICE_NOT_RUNNING; |
| } else if (signal_pending(current)) { |
| PERROR("Wait on values interrupted from signal.\n"); |
| instance->status = ao_status_none; |
| ao_stop_immediately(instance); |
| err = ME_ERRNO_SIGNAL; |
| } else if ((jiffies - j) >= t) { |
| PERROR("Wait on values timed out.\n"); |
| err = ME_ERRNO_TIMEOUT; |
| } else { //Uff... all is good. Inform user about empty space. |
| *count = me_circ_buf_space(&instance->circ_buf); |
| } |
| } |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me6000_ao_io_stream_start(me_subdevice_t * subdevice, |
| struct file *filep, |
| int start_mode, int time_out, int flags) |
| { |
| me6000_ao_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| unsigned long cpu_flags = 0; |
| uint32_t status; |
| uint32_t ctrl; |
| uint32_t synch; |
| int count = 0; |
| int circ_buffer_count; |
| |
| unsigned long ref; |
| unsigned long delay = 0; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if (!(instance->fifo & ME6000_AO_HAS_FIFO)) { |
| PERROR("Not a streaming ao.\n"); |
| return ME_ERRNO_NOT_SUPPORTED; |
| } |
| |
| if (flags & ~ME_IO_STREAM_START_TYPE_TRIG_SYNCHRONOUS) { |
| PERROR("Invalid flags.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if (time_out < 0) { |
| PERROR("Invalid timeout specified.\n"); |
| return ME_ERRNO_INVALID_TIMEOUT; |
| } |
| |
| if ((start_mode != ME_START_MODE_BLOCKING) |
| && (start_mode != ME_START_MODE_NONBLOCKING)) { |
| PERROR("Invalid start mode specified.\n"); |
| return ME_ERRNO_INVALID_START_MODE; |
| } |
| |
| if (time_out) { |
| delay = (time_out * HZ) / 1000; |
| if (delay == 0) |
| delay = 1; |
| } |
| |
| switch (instance->status) { //Checking actual mode. |
| case ao_status_stream_configured: |
| case ao_status_stream_end: |
| //Correct modes! |
| break; |
| |
| //The device is in wrong mode. |
| case ao_status_none: |
| case ao_status_single_configured: |
| case ao_status_single_run_wait: |
| case ao_status_single_run: |
| case ao_status_single_end_wait: |
| PERROR |
| ("Subdevice must be preinitialize correctly for streaming.\n"); |
| return ME_ERRNO_PREVIOUS_CONFIG; |
| |
| case ao_status_stream_fifo_error: |
| case ao_status_stream_buffer_error: |
| case ao_status_stream_error: |
| PDEBUG("Before restart broke stream 'STOP' must be caled.\n"); |
| return ME_STATUS_ERROR; |
| |
| case ao_status_stream_run_wait: |
| case ao_status_stream_run: |
| case ao_status_stream_end_wait: |
| PDEBUG("Stream is already working.\n"); |
| return ME_ERRNO_SUBDEVICE_BUSY; |
| |
| default: |
| instance->status = ao_status_stream_error; |
| PERROR_CRITICAL("Status is in wrong state!\n"); |
| return ME_ERRNO_INTERNAL; |
| |
| } |
| |
| ME_SUBDEVICE_ENTER; |
| |
| if (instance->mode == ME6000_AO_CONTINOUS) { //Continous |
| instance->circ_buf.tail += instance->preloaded_count; |
| instance->circ_buf.tail &= instance->circ_buf.mask; |
| } |
| circ_buffer_count = me_circ_buf_values(&instance->circ_buf); |
| |
| if (!circ_buffer_count && !instance->preloaded_count) { //No values in buffer |
| ME_SUBDEVICE_EXIT; |
| PERROR("No values in buffer!\n"); |
| return ME_ERRNO_LACK_OF_RESOURCES; |
| } |
| |
| //Cancel control task |
| PDEBUG("Cancel control task. idx=%d\n", instance->ao_idx); |
| instance->ao_control_task_flag = 0; |
| cancel_delayed_work(&instance->ao_control_task); |
| |
| //Stop device |
| err = ao_stop_immediately(instance); |
| if (err) { |
| PERROR_CRITICAL("FSM IS BUSY!\n"); |
| ME_SUBDEVICE_EXIT; |
| |
| return ME_ERRNO_SUBDEVICE_BUSY; |
| } |
| //Set values for single_read() |
| instance->single_value = ME6000_AO_MAX_DATA + 1; |
| instance->single_value_in_fifo = ME6000_AO_MAX_DATA + 1; |
| |
| //Setting stop points |
| if (instance->stop_mode == ME6000_AO_SCAN_STOP_MODE) { |
| instance->stop_data_count = |
| instance->stop_count * circ_buffer_count; |
| } else { |
| instance->stop_data_count = instance->stop_count; |
| } |
| |
| if ((instance->stop_data_count != 0) |
| && (instance->stop_data_count < circ_buffer_count)) { |
| PERROR("More data in buffer than previously set limit!\n"); |
| } |
| |
| spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| ctrl = inl(instance->ctrl_reg); |
| //Check FIFO |
| if (!(ctrl & ME6000_AO_CTRL_BIT_ENABLE_FIFO)) { //FIFO wasn't enabeled. Do it. <= This should be done by user call with ME_WRITE_MODE_PRELOAD |
| PINFO("Enableing FIFO.\n"); |
| ctrl |= ME6000_AO_CTRL_BIT_ENABLE_FIFO; |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| |
| instance->preloaded_count = 0; |
| instance->data_count = 0; |
| } else { //Block IRQ |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| } |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, ctrl); |
| |
| //Reset interrupt latch |
| inl(instance->irq_reset_reg); |
| |
| //Fill FIFO <= Generaly this should be done by user pre-load call but this is second place to do it. |
| status = inl(instance->status_reg); |
| if (!(status & ME6000_AO_STATUS_BIT_EF)) { //FIFO empty |
| if (instance->stop_data_count != 0) { |
| count = ME6000_AO_FIFO_COUNT; |
| } else { |
| count = |
| (ME6000_AO_FIFO_COUNT < |
| instance-> |
| stop_data_count) ? ME6000_AO_FIFO_COUNT : |
| instance->stop_data_count; |
| } |
| |
| //Copy data |
| count = |
| ao_write_data(instance, count, instance->preloaded_count); |
| |
| if (count < 0) { //This should never happend! |
| PERROR_CRITICAL("COPY FINISH WITH ERROR!\n"); |
| spin_unlock_irqrestore(&instance->subdevice_lock, |
| cpu_flags); |
| ME_SUBDEVICE_EXIT; |
| return ME_ERRNO_INTERNAL; |
| } |
| } |
| //Set pre-load features. |
| spin_lock(instance->preload_reg_lock); |
| synch = inl(instance->preload_reg); |
| synch &= |
| ~((ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG) << instance-> |
| ao_idx); |
| synch |= |
| (instance->start_mode & ~ME6000_AO_EXT_TRIG) << instance->ao_idx; |
| outl(synch, instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->preload_reg - instance->reg_base, synch); |
| spin_unlock(instance->preload_reg_lock); |
| |
| //Default count is '0' |
| if (instance->mode == ME6000_AO_CONTINOUS) { //Continous |
| instance->preloaded_count = 0; |
| instance->circ_buf.tail += count; |
| instance->circ_buf.tail &= instance->circ_buf.mask; |
| } else { //Wraparound |
| instance->preloaded_count += count; |
| instance->data_count += count; |
| |
| //Special case: Infinite wraparound with less than FIFO datas always should runs in hardware mode. |
| if ((instance->stop_mode == ME6000_AO_INF_STOP_MODE) |
| && (circ_buffer_count <= ME6000_AO_FIFO_COUNT)) { //Change to hardware wraparound |
| PDEBUG |
| ("Changeing mode from software wraparound to hardware wraparound.\n"); |
| //Copy all data |
| count = |
| ao_write_data(instance, circ_buffer_count, |
| instance->preloaded_count); |
| ctrl &= ~ME6000_AO_CTRL_MODE_MASK; |
| ctrl |= ME6000_AO_MODE_WRAPAROUND; |
| } |
| |
| if (instance->preloaded_count == me_circ_buf_values(&instance->circ_buf)) { //Reset position indicator. |
| instance->preloaded_count = 0; |
| } else if (instance->preloaded_count > me_circ_buf_values(&instance->circ_buf)) { //This should never happend! |
| PERROR_CRITICAL |
| ("PRELOADED MORE VALUES THAN ARE IN BUFFER!\n"); |
| spin_unlock_irqrestore(&instance->subdevice_lock, |
| cpu_flags); |
| ME_SUBDEVICE_EXIT; |
| return ME_ERRNO_INTERNAL; |
| } |
| } |
| |
| //Set status to 'wait for start' |
| instance->status = ao_status_stream_run_wait; |
| |
| status = inl(instance->status_reg); |
| //Start state machine and interrupts |
| PINFO("<%s:%d> Start state machine.\n", __func__, __LINE__); |
| ctrl &= ~(ME6000_AO_CTRL_BIT_STOP | ME6000_AO_CTRL_BIT_IMMEDIATE_STOP); |
| if (instance->start_mode == ME6000_AO_EXT_TRIG) { |
| PDEBUG("DIGITAL TRIGGER\n"); |
| ctrl |= ME6000_AO_CTRL_BIT_ENABLE_EX_TRIG; |
| } |
| if (!(status & ME6000_AO_STATUS_BIT_HF)) { //More than half! |
| if ((ctrl & ME6000_AO_CTRL_MODE_MASK) == ME6000_AO_MODE_CONTINUOUS) { //Enable IRQ only when hardware_continous is set and FIFO is more than half |
| PINFO("<%s:%d> Start interrupts.\n", __func__, |
| __LINE__); |
| ctrl |= ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| } |
| } |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, ctrl); |
| spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags); |
| |
| //Trigger output |
| PINFO("<%s> start mode= 0x%x %s\n", __func__, instance->start_mode, |
| (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) ? "SYNCHRONOUS" : |
| ""); |
| if (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) { //Trigger outputs |
| spin_lock(instance->preload_reg_lock); |
| synch = inl(instance->preload_reg); |
| //Add channel to start list |
| outl(synch | (ME6000_AO_SYNC_HOLD << instance->ao_idx), |
| instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| synch | (ME6000_AO_SYNC_HOLD << instance->ao_idx)); |
| |
| //Fire |
| PINFO |
| ("Fired all software synchronous outputs by software trigger.\n"); |
| outl(0x8000, instance->single_reg); |
| PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->single_reg - instance->reg_base, 0x8000); |
| |
| //Restore save settings |
| outl(synch, instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, synch); |
| spin_unlock(instance->preload_reg_lock); |
| } else if (!instance->start_mode) { //Trigger outputs |
| /* |
| spin_lock(instance->preload_reg_lock); |
| synch = inl(instance->preload_reg); |
| //Remove channel from start list |
| outl(synch & ~(ME6000_AO_SYNC_HOLD << instance->ao_idx), instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, instance->preload_reg - instance->reg_base, synch & ~(ME6000_AO_SYNC_HOLD << instance->ao_idx)); |
| */ |
| //Fire |
| PINFO("Software trigger.\n"); |
| outl(0x8000, instance->single_reg); |
| PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->single_reg - instance->reg_base, 0x8000); |
| |
| /* |
| //Restore save settings |
| outl(synch, instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, instance->preload_reg - instance->reg_base, synch); |
| spin_unlock(instance->preload_reg_lock); |
| */ |
| } |
| // Set control task's timeout |
| instance->timeout.delay = delay; |
| instance->timeout.start_time = jiffies; |
| |
| if (status & ME6000_AO_STATUS_BIT_HF) { //Less than half but not empty! |
| PINFO("Less than half.\n"); |
| if (instance->stop_data_count == 0) { |
| count = ME6000_AO_FIFO_COUNT / 2; |
| } else { |
| count = |
| ((ME6000_AO_FIFO_COUNT / 2) < |
| instance->stop_data_count) ? ME6000_AO_FIFO_COUNT / |
| 2 : instance->stop_data_count; |
| } |
| |
| //Copy data |
| count = |
| ao_write_data(instance, count, instance->preloaded_count); |
| |
| if (count < 0) { //This should never happend! |
| PERROR_CRITICAL("COPY FINISH WITH ERROR!\n"); |
| ME_SUBDEVICE_EXIT; |
| return ME_ERRNO_INTERNAL; |
| } |
| |
| if (instance->mode == ME6000_AO_CONTINOUS) { //Continous |
| instance->circ_buf.tail += count; |
| instance->circ_buf.tail &= instance->circ_buf.mask; |
| } else { //Wraparound |
| instance->data_count += count; |
| instance->preloaded_count += count; |
| |
| if (instance->preloaded_count == me_circ_buf_values(&instance->circ_buf)) { //Reset position indicator. |
| instance->preloaded_count = 0; |
| } else if (instance->preloaded_count > me_circ_buf_values(&instance->circ_buf)) { //This should never happend! |
| PERROR_CRITICAL |
| ("PRELOADED MORE VALUES THAN ARE IN BUFFER!\n"); |
| ME_SUBDEVICE_EXIT; |
| return ME_ERRNO_INTERNAL; |
| } |
| } |
| |
| status = inl(instance->status_reg); |
| if (!(status & ME6000_AO_STATUS_BIT_HF)) { //More than half! |
| spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| PINFO("<%s:%d> Start interrupts.\n", __func__, |
| __LINE__); |
| ctrl = inl(instance->ctrl_reg); |
| ctrl |= ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, |
| ctrl); |
| spin_unlock_irqrestore(&instance->subdevice_lock, |
| cpu_flags); |
| } |
| } |
| //Special case: Limited wraparound with less than HALF FIFO datas need work around to generate first interrupt. |
| if ((instance->stop_mode != ME6000_AO_INF_STOP_MODE) |
| && (instance->mode == ME6000_AO_SW_WRAP_MODE) |
| && (circ_buffer_count <= (ME6000_AO_FIFO_COUNT / 2))) { //Put more data to FIFO |
| PINFO("Limited wraparound with less than HALF FIFO datas.\n"); |
| if (instance->preloaded_count) { //This should never happend! |
| PERROR_CRITICAL |
| ("ERROR WHEN LOADING VALUES FOR WRAPAROUND!\n"); |
| ME_SUBDEVICE_EXIT; |
| return ME_ERRNO_INTERNAL; |
| } |
| |
| while (instance->stop_data_count > instance->data_count) { //Maximum data not set jet. |
| //Copy to buffer |
| if (circ_buffer_count != ao_write_data(instance, circ_buffer_count, 0)) { //This should never happend! |
| PERROR_CRITICAL |
| ("ERROR WHEN LOADING VALUES FOR WRAPAROUND!\n"); |
| ME_SUBDEVICE_EXIT; |
| return ME_ERRNO_INTERNAL; |
| } |
| instance->data_count += circ_buffer_count; |
| |
| if (!((status = inl(instance->status_reg)) & ME6000_AO_STATUS_BIT_HF)) { //FIFO is more than half. Enable IRQ and end copy. |
| //Reset interrupt latch |
| inl(instance->irq_reset_reg); |
| |
| spin_lock_irqsave(&instance->subdevice_lock, |
| cpu_flags); |
| PINFO("<%s:%d> Start interrupts.\n", |
| __func__, __LINE__); |
| ctrl = inl(instance->ctrl_reg); |
| ctrl |= ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - |
| instance->reg_base, ctrl); |
| spin_unlock_irqrestore(&instance-> |
| subdevice_lock, |
| cpu_flags); |
| break; |
| } |
| } |
| } |
| // Schedule control task |
| instance->ao_control_task_flag = 1; |
| queue_delayed_work(instance->me6000_workqueue, |
| &instance->ao_control_task, 1); |
| |
| if (start_mode == ME_START_MODE_BLOCKING) { //Wait for start. |
| ref = jiffies; |
| //Only runing process will interrupt this call. Events are signaled when status change. Extra timeout add for safe reason. |
| wait_event_interruptible_timeout(instance->wait_queue, |
| (instance->status != |
| ao_status_stream_run_wait), |
| (delay) ? delay + |
| 1 : LONG_MAX); |
| |
| if ((instance->status != ao_status_stream_run) |
| && (instance->status != ao_status_stream_end)) { |
| PDEBUG("Starting stream canceled. %d\n", |
| instance->status); |
| err = ME_ERRNO_CANCELLED; |
| } |
| |
| if (signal_pending(current)) { |
| PERROR("Wait on start of state machine interrupted.\n"); |
| instance->status = ao_status_none; |
| ao_stop_immediately(instance); |
| err = ME_ERRNO_SIGNAL; |
| } |
| |
| if ((delay) && ((jiffies - ref) >= delay)) { |
| if (instance->status != ao_status_stream_run) { |
| if (instance->status == ao_status_stream_end) { |
| PDEBUG("Timeout reached.\n"); |
| } else if ((jiffies - ref) > delay) { |
| PERROR |
| ("Timeout reached. Not handled by control task!\n"); |
| ao_stop_immediately(instance); |
| } else { |
| PERROR |
| ("Timeout reached. Signal come but status is strange: %d\n", |
| instance->status); |
| ao_stop_immediately(instance); |
| } |
| |
| instance->ao_control_task_flag = 0; |
| cancel_delayed_work(&instance->ao_control_task); |
| instance->status = ao_status_stream_end; |
| err = ME_ERRNO_TIMEOUT; |
| } |
| } |
| } |
| |
| ME_SUBDEVICE_EXIT; |
| return err; |
| } |
| |
| static int me6000_ao_io_stream_status(me_subdevice_t * subdevice, |
| struct file *filep, |
| int wait, |
| int *status, int *values, int flags) |
| { |
| me6000_ao_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if (!(instance->fifo & ME6000_AO_HAS_FIFO)) { |
| PERROR("Not a streaming ao.\n"); |
| return ME_ERRNO_NOT_SUPPORTED; |
| } |
| |
| if (flags) { |
| PERROR("Invalid flag specified.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if ((wait != ME_WAIT_NONE) && (wait != ME_WAIT_IDLE)) { |
| PERROR("Invalid wait argument specified.\n"); |
| *status = ME_STATUS_INVALID; |
| return ME_ERRNO_INVALID_WAIT; |
| } |
| |
| ME_SUBDEVICE_ENTER; |
| |
| switch (instance->status) { |
| case ao_status_single_configured: |
| case ao_status_single_end: |
| case ao_status_stream_configured: |
| case ao_status_stream_end: |
| case ao_status_stream_fifo_error: |
| case ao_status_stream_buffer_error: |
| case ao_status_stream_error: |
| *status = ME_STATUS_IDLE; |
| break; |
| |
| case ao_status_single_run_wait: |
| case ao_status_single_run: |
| case ao_status_single_end_wait: |
| case ao_status_stream_run_wait: |
| case ao_status_stream_run: |
| case ao_status_stream_end_wait: |
| *status = ME_STATUS_BUSY; |
| break; |
| |
| case ao_status_none: |
| default: |
| *status = |
| (inl(instance->status_reg) & ME6000_AO_STATUS_BIT_FSM) ? |
| ME_STATUS_BUSY : ME_STATUS_IDLE; |
| break; |
| } |
| |
| if ((wait == ME_WAIT_IDLE) && (*status == ME_STATUS_BUSY)) { |
| //Only runing process will interrupt this call. Events are signaled when status change. Extra timeout add for safe reason. |
| wait_event_interruptible_timeout(instance->wait_queue, |
| ((instance->status != |
| ao_status_single_run_wait) |
| && (instance->status != |
| ao_status_single_run) |
| && (instance->status != |
| ao_status_single_end_wait) |
| && (instance->status != |
| ao_status_stream_run_wait) |
| && (instance->status != |
| ao_status_stream_run) |
| && (instance->status != |
| ao_status_stream_end_wait)), |
| LONG_MAX); |
| |
| if (instance->status != ao_status_stream_end) { |
| PDEBUG("Wait for IDLE canceled. %d\n", |
| instance->status); |
| err = ME_ERRNO_CANCELLED; |
| } |
| |
| if (signal_pending(current)) { |
| PERROR("Wait for IDLE interrupted.\n"); |
| instance->status = ao_status_none; |
| ao_stop_immediately(instance); |
| err = ME_ERRNO_SIGNAL; |
| } |
| |
| *status = ME_STATUS_IDLE; |
| } |
| |
| *values = me_circ_buf_space(&instance->circ_buf); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me6000_ao_io_stream_stop(me_subdevice_t * subdevice, |
| struct file *filep, |
| int stop_mode, int flags) |
| { /// @note Stop work and empty buffer and FIFO |
| int err = ME_ERRNO_SUCCESS; |
| me6000_ao_subdevice_t *instance; |
| unsigned long cpu_flags; |
| volatile uint32_t ctrl; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if (flags & ~ME_IO_STREAM_STOP_PRESERVE_BUFFERS) { |
| PERROR("Invalid flag specified.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if ((stop_mode != ME_STOP_MODE_IMMEDIATE) |
| && (stop_mode != ME_STOP_MODE_LAST_VALUE)) { |
| PERROR("Invalid stop mode specified.\n"); |
| return ME_ERRNO_INVALID_STOP_MODE; |
| } |
| |
| if (!(instance->fifo & ME6000_AO_HAS_FIFO)) { |
| PERROR("Not a streaming ao.\n"); |
| return ME_ERRNO_NOT_SUPPORTED; |
| } |
| |
| if (instance->status < ao_status_stream_configured) { |
| //There is nothing to stop! |
| PERROR("Subdevice not in streaming mode. %d\n", |
| instance->status); |
| return ME_ERRNO_PREVIOUS_CONFIG; |
| } |
| |
| ME_SUBDEVICE_ENTER; |
| |
| //Mark as stopping. => Software stop. |
| instance->status = ao_status_stream_end_wait; |
| |
| if (stop_mode == ME_STOP_MODE_IMMEDIATE) { //Stopped now! |
| err = ao_stop_immediately(instance); |
| } else if (stop_mode == ME_STOP_MODE_LAST_VALUE) { |
| ctrl = inl(instance->ctrl_reg) & ME6000_AO_CTRL_MODE_MASK; |
| if (ctrl == ME6000_AO_MODE_WRAPAROUND) { //Hardware wraparound => Hardware stop. |
| spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| ctrl = inl(instance->ctrl_reg); |
| ctrl |= ME6000_AO_CTRL_BIT_STOP; |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, |
| ctrl); |
| spin_unlock_irqrestore(&instance->subdevice_lock, |
| cpu_flags); |
| |
| //Reset interrupt latch |
| inl(instance->irq_reset_reg); |
| } |
| //Only runing process will interrupt this call. Events are signaled when status change. Extra timeout add for safe reason. |
| wait_event_interruptible_timeout(instance->wait_queue, |
| (instance->status != |
| ao_status_stream_end_wait), |
| LONG_MAX); |
| |
| if (instance->status != ao_status_stream_end) { |
| PDEBUG("Stopping stream canceled.\n"); |
| err = ME_ERRNO_CANCELLED; |
| } |
| |
| if (signal_pending(current)) { |
| PERROR("Stopping stream interrupted.\n"); |
| instance->status = ao_status_none; |
| ao_stop_immediately(instance); |
| err = ME_ERRNO_SIGNAL; |
| } |
| } |
| |
| spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| ctrl = inl(instance->ctrl_reg); |
| ctrl |= ME6000_AO_CTRL_BIT_STOP | ME6000_AO_CTRL_BIT_IMMEDIATE_STOP; |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| if (!flags) { //Reset FIFO |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_FIFO; |
| } |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, ctrl); |
| spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags); |
| |
| //Reset interrupt latch |
| inl(instance->irq_reset_reg); |
| |
| if (!flags) { //Reset software buffer |
| instance->circ_buf.head = 0; |
| instance->circ_buf.tail = 0; |
| instance->preloaded_count = 0; |
| instance->data_count = 0; |
| } |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me6000_ao_io_stream_write(me_subdevice_t * subdevice, |
| struct file *filep, |
| int write_mode, |
| int *values, int *count, int flags) |
| { |
| int err = ME_ERRNO_SUCCESS; |
| me6000_ao_subdevice_t *instance; |
| unsigned long cpu_flags = 0; |
| uint32_t reg_copy; |
| |
| int copied_from_user = 0; |
| int left_to_copy_from_user = *count; |
| |
| int copied_values; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| //Checking arguments |
| if (!(instance->fifo & ME6000_AO_HAS_FIFO)) { |
| PERROR("Not a streaming ao.\n"); |
| return ME_ERRNO_NOT_SUPPORTED; |
| } |
| |
| if (flags) { |
| PERROR("Invalid flag specified.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if (*count <= 0) { |
| PERROR("Invalid count of values specified.\n"); |
| return ME_ERRNO_INVALID_VALUE_COUNT; |
| } |
| |
| if (values == NULL) { |
| PERROR("Invalid address of values specified.\n"); |
| return ME_ERRNO_INVALID_POINTER; |
| } |
| |
| if ((instance->status == ao_status_none) || (instance->status == ao_status_single_configured)) { //The device is in single mode. |
| PERROR |
| ("Subdevice must be preinitialize correctly for streaming.\n"); |
| return ME_ERRNO_PREVIOUS_CONFIG; |
| } |
| |
| switch (write_mode) { |
| case ME_WRITE_MODE_PRELOAD: |
| |
| //Device must be stopped. |
| if ((instance->status != ao_status_stream_configured) |
| && (instance->status != ao_status_stream_end)) { |
| PERROR |
| ("Subdevice mustn't be runing when 'pre-load' mode is used.\n"); |
| return ME_ERRNO_PREVIOUS_CONFIG; |
| } |
| break; |
| case ME_WRITE_MODE_NONBLOCKING: |
| case ME_WRITE_MODE_BLOCKING: |
| /// @note In blocking mode: When device is not runing and there is not enought space call will blocked up! |
| /// @note Some other thread must empty buffer by strating engine. |
| break; |
| |
| default: |
| PERROR("Invalid write mode specified.\n"); |
| return ME_ERRNO_INVALID_WRITE_MODE; |
| } |
| |
| if (instance->mode & ME6000_AO_WRAP_MODE) { //Wraparound mode. Device must be stopped. |
| if ((instance->status != ao_status_stream_configured) |
| && (instance->status != ao_status_stream_end)) { |
| PERROR |
| ("Subdevice mustn't be runing when 'pre-load' mode is used.\n"); |
| return ME_ERRNO_INVALID_WRITE_MODE; |
| } |
| } |
| |
| if ((instance->mode == ME6000_AO_HW_WRAP_MODE) |
| && (write_mode != ME_WRITE_MODE_PRELOAD)) { |
| /* |
| PERROR("Only 'pre-load' write is acceptable in hardware wraparound mode.\n"); |
| return ME_ERRNO_PREVIOUS_CONFIG; |
| */ |
| //This is transparent for user. |
| PDEBUG("Changing write_mode to ME_WRITE_MODE_PRELOAD.\n"); |
| write_mode = ME_WRITE_MODE_PRELOAD; |
| } |
| |
| ME_SUBDEVICE_ENTER; |
| |
| if (write_mode == ME_WRITE_MODE_PRELOAD) { //Init enviroment - preload |
| spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| reg_copy = inl(instance->ctrl_reg); |
| //Check FIFO |
| if (!(reg_copy & ME6000_AO_CTRL_BIT_ENABLE_FIFO)) { //FIFO not active. Enable it. |
| reg_copy |= ME6000_AO_CTRL_BIT_ENABLE_FIFO; |
| outl(reg_copy, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, |
| reg_copy); |
| instance->preloaded_count = 0; |
| } |
| spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags); |
| } |
| |
| while (1) { |
| //Copy to buffer. This step is common for all modes. |
| copied_from_user = |
| ao_get_data_from_user(instance, left_to_copy_from_user, |
| values + (*count - |
| left_to_copy_from_user)); |
| left_to_copy_from_user -= copied_from_user; |
| |
| reg_copy = inl(instance->status_reg); |
| if ((instance->status == ao_status_stream_run) && !(reg_copy & ME6000_AO_STATUS_BIT_FSM)) { //BROKEN PIPE! The state machine is stoped but logical status show that should be working. |
| PERROR("Broken pipe in write.\n"); |
| err = ME_ERRNO_SUBDEVICE_NOT_RUNNING; |
| break; |
| } |
| |
| if ((instance->status == ao_status_stream_run) && (instance->mode == ME6000_AO_CONTINOUS) && (reg_copy & ME6000_AO_STATUS_BIT_HF)) { //Continous mode runing and data are below half! |
| |
| // Block interrupts. |
| spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| reg_copy = inl(instance->ctrl_reg); |
| reg_copy &= ~ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| outl(reg_copy, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, |
| reg_copy); |
| spin_unlock_irqrestore(&instance->subdevice_lock, |
| cpu_flags); |
| |
| //Fast copy |
| copied_values = |
| ao_write_data(instance, ME6000_AO_FIFO_COUNT / 2, |
| 0); |
| if (copied_values > 0) { |
| instance->circ_buf.tail += copied_values; |
| instance->circ_buf.tail &= |
| instance->circ_buf.mask; |
| continue; |
| } |
| //Reset interrupt latch |
| inl(instance->irq_reset_reg); |
| |
| // Activate interrupts. |
| spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| reg_copy = inl(instance->ctrl_reg); |
| reg_copy |= ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| outl(reg_copy, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, |
| reg_copy); |
| spin_unlock_irqrestore(&instance->subdevice_lock, |
| cpu_flags); |
| |
| if (copied_values == 0) { //This was checked and never should happend! |
| PERROR_CRITICAL("COPY FINISH WITH 0!\n"); |
| } |
| |
| if (copied_values < 0) { //This was checked and never should happend! |
| PERROR_CRITICAL("COPY FINISH WITH ERROR!\n"); |
| instance->status = ao_status_stream_fifo_error; |
| err = ME_ERRNO_FIFO_BUFFER_OVERFLOW; |
| break; |
| } |
| } |
| |
| if (!left_to_copy_from_user) { //All datas were copied. |
| break; |
| } else { //Not all datas were copied. |
| if (instance->mode & ME6000_AO_WRAP_MODE) { //Error too much datas! Wraparound is limited in size! |
| PERROR |
| ("Too much data for wraparound mode! Exceeded size of %ld.\n", |
| ME6000_AO_CIRC_BUF_COUNT - 1); |
| err = ME_ERRNO_RING_BUFFER_OVERFLOW; |
| break; |
| } |
| |
| if (write_mode != ME_WRITE_MODE_BLOCKING) { //Non blocking calls |
| break; |
| } |
| |
| wait_event_interruptible(instance->wait_queue, |
| me_circ_buf_space(&instance-> |
| circ_buf)); |
| |
| if (signal_pending(current)) { |
| PERROR("Writing interrupted by signal.\n"); |
| instance->status = ao_status_none; |
| ao_stop_immediately(instance); |
| err = ME_ERRNO_SIGNAL; |
| break; |
| } |
| |
| if (instance->status == ao_status_none) { //Reset |
| PERROR("Writing interrupted by reset.\n"); |
| err = ME_ERRNO_CANCELLED; |
| break; |
| } |
| } |
| } |
| |
| if (write_mode == ME_WRITE_MODE_PRELOAD) { //Copy data to FIFO - preload |
| copied_values = |
| ao_write_data_pooling(instance, ME6000_AO_FIFO_COUNT, |
| instance->preloaded_count); |
| instance->preloaded_count += copied_values; |
| instance->data_count += copied_values; |
| |
| if ((instance->mode == ME6000_AO_HW_WRAP_MODE) |
| && (me_circ_buf_values(&instance->circ_buf) > |
| ME6000_AO_FIFO_COUNT)) { |
| PERROR |
| ("Too much data for hardware wraparound mode! Exceeded size of %d.\n", |
| ME6000_AO_FIFO_COUNT); |
| err = ME_ERRNO_FIFO_BUFFER_OVERFLOW; |
| } |
| } |
| |
| *count = *count - left_to_copy_from_user; |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) |
| static irqreturn_t me6000_ao_isr(int irq, void *dev_id) |
| #else |
| static irqreturn_t me6000_ao_isr(int irq, void *dev_id, struct pt_regs *regs) |
| #endif |
| { |
| me6000_ao_subdevice_t *instance = dev_id; |
| uint32_t irq_status; |
| uint32_t ctrl; |
| uint32_t status; |
| int count = 0; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if (irq != instance->irq) { |
| PERROR("Incorrect interrupt num: %d.\n", irq); |
| return IRQ_NONE; |
| } |
| |
| irq_status = inl(instance->irq_status_reg); |
| if (!(irq_status & (ME6000_IRQ_STATUS_BIT_AO_HF << instance->ao_idx))) { |
| PINFO("%ld Shared interrupt. %s(): ID=%d: status_reg=0x%04X\n", |
| jiffies, __func__, instance->ao_idx, irq_status); |
| return IRQ_NONE; |
| } |
| |
| if (!instance->circ_buf.buf) { |
| instance->status = ao_status_stream_error; |
| PERROR_CRITICAL("CIRCULAR BUFFER NOT EXISTS!\n"); |
| //Block interrupts. Stop machine. |
| ctrl = inl(instance->ctrl_reg); |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| ctrl |= |
| ME6000_AO_CTRL_BIT_IMMEDIATE_STOP | ME6000_AO_CTRL_BIT_STOP; |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, ctrl); |
| |
| //Inform user |
| wake_up_interruptible_all(&instance->wait_queue); |
| return IRQ_HANDLED; |
| } |
| |
| status = inl(instance->status_reg); |
| if (!(status & ME6000_AO_STATUS_BIT_FSM)) { //Too late. Not working! END? BROKEN PIPE? |
| /// @note Error checking was moved to separate task. |
| PDEBUG("Interrupt come but ISM is not working!\n"); |
| //Block interrupts. Stop machine. |
| ctrl = inl(instance->ctrl_reg); |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| ctrl |= |
| ME6000_AO_CTRL_BIT_STOP | ME6000_AO_CTRL_BIT_IMMEDIATE_STOP; |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, ctrl); |
| |
| //Reset interrupt latch |
| inl(instance->irq_reset_reg); |
| |
| /// @note User notification was also moved to separate task. |
| return IRQ_HANDLED; |
| } |
| //General procedure. Process more datas. |
| |
| #ifdef MEDEBUG_DEBUG |
| if (!me_circ_buf_values(&instance->circ_buf)) { //Buffer is empty! |
| PDEBUG("Circular buffer empty!\n"); |
| } |
| #endif |
| |
| //Check FIFO |
| if (status & ME6000_AO_STATUS_BIT_HF) { //OK less than half |
| |
| //Block interrupts |
| ctrl = inl(instance->ctrl_reg); |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, ctrl); |
| |
| do { |
| //Calculate how many should be copied. |
| count = |
| (instance->stop_data_count) ? instance-> |
| stop_data_count - |
| instance->data_count : ME6000_AO_FIFO_COUNT / 2; |
| if (ME6000_AO_FIFO_COUNT / 2 < count) { |
| count = ME6000_AO_FIFO_COUNT / 2; |
| } |
| //Copy data |
| if (instance->mode == ME6000_AO_CONTINOUS) { //Continous |
| count = ao_write_data(instance, count, 0); |
| if (count > 0) { |
| instance->circ_buf.tail += count; |
| instance->circ_buf.tail &= |
| instance->circ_buf.mask; |
| instance->data_count += count; |
| |
| if ((instance->status == ao_status_stream_end_wait) && !me_circ_buf_values(&instance->circ_buf)) { //Stoping. Whole buffer was copied. |
| break; |
| } |
| } |
| } else if ((instance->mode == ME6000_AO_SW_WRAP_MODE) && ((ctrl & ME6000_AO_CTRL_MODE_MASK) == ME6000_AO_MODE_CONTINUOUS)) { //Wraparound (software) |
| if (instance->status == ao_status_stream_end_wait) { //We stoping => Copy to the end of the buffer. |
| count = |
| ao_write_data(instance, count, 0); |
| } else { //Copy in wraparound mode. |
| count = |
| ao_write_data_wraparound(instance, |
| count, |
| instance-> |
| preloaded_count); |
| } |
| |
| if (count > 0) { |
| instance->data_count += count; |
| instance->preloaded_count += count; |
| instance->preloaded_count %= |
| me_circ_buf_values(&instance-> |
| circ_buf); |
| |
| if ((instance->status == ao_status_stream_end_wait) && !instance->preloaded_count) { //Stoping. Whole buffer was copied. |
| break; |
| } |
| } |
| } |
| |
| if ((count <= 0) || (instance->stop_data_count && (instance->stop_data_count <= instance->data_count))) { //End of work. |
| break; |
| } |
| } //Repeat if still is under half fifo |
| while ((status = |
| inl(instance->status_reg)) & ME6000_AO_STATUS_BIT_HF); |
| |
| //Unblock interrupts |
| ctrl = inl(instance->ctrl_reg); |
| if (count >= 0) { //Copy was successful. |
| if (instance->stop_data_count && (instance->stop_data_count <= instance->data_count)) { //Finishing work. No more interrupts. |
| PDEBUG("Finishing work. Interrupt disabled.\n"); |
| instance->status = ao_status_stream_end_wait; |
| } else if (count > 0) { //Normal work. Enable interrupt. |
| PDEBUG("Normal work. Enable interrupt.\n"); |
| ctrl |= ME6000_AO_CTRL_BIT_ENABLE_IRQ; |
| } else { //Normal work but there are no more data in buffer. Interrupt blocked. stream_write() will unblock it. |
| PDEBUG |
| ("No data in software buffer. Interrupt blocked.\n"); |
| } |
| } else { //Error during copy. |
| instance->status = ao_status_stream_fifo_error; |
| } |
| |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, ctrl); |
| } else { //?? more than half |
| PDEBUG |
| ("Interrupt come but FIFO more than half full! Reset interrupt.\n"); |
| } |
| |
| PINFO("ISR: Buffer count: %d.(T:%d H:%d)\n", |
| me_circ_buf_values(&instance->circ_buf), instance->circ_buf.tail, |
| instance->circ_buf.head); |
| PINFO("ISR: Stop count: %d.\n", instance->stop_count); |
| PINFO("ISR: Stop data count: %d.\n", instance->stop_data_count); |
| PINFO("ISR: Data count: %d.\n", instance->data_count); |
| |
| //Reset interrupt latch |
| inl(instance->irq_reset_reg); |
| |
| //Inform user |
| wake_up_interruptible_all(&instance->wait_queue); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void me6000_ao_destructor(struct me_subdevice *subdevice) |
| { |
| me6000_ao_subdevice_t *instance; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| instance->ao_control_task_flag = 0; |
| |
| // Reset subdevice to asure clean exit. |
| me6000_ao_io_reset_subdevice(subdevice, NULL, |
| ME_IO_RESET_SUBDEVICE_NO_FLAGS); |
| |
| // Remove any tasks from work queue. This is paranoic because it was done allready in reset(). |
| if (!cancel_delayed_work(&instance->ao_control_task)) { //Wait 2 ticks to be sure that control task is removed from queue. |
| set_current_state(TASK_INTERRUPTIBLE); |
| schedule_timeout(2); |
| } |
| |
| if (instance->fifo & ME6000_AO_HAS_FIFO) { |
| if (instance->irq) { |
| free_irq(instance->irq, instance); |
| instance->irq = 0; |
| } |
| |
| if (instance->circ_buf.buf) { |
| PDEBUG("free circ_buf = %p size=%d", |
| instance->circ_buf.buf, |
| PAGE_SHIFT << ME6000_AO_CIRC_BUF_SIZE_ORDER); |
| free_pages((unsigned long)instance->circ_buf.buf, |
| ME6000_AO_CIRC_BUF_SIZE_ORDER); |
| } |
| instance->circ_buf.buf = NULL; |
| } |
| |
| me_subdevice_deinit(&instance->base); |
| kfree(instance); |
| } |
| |
| me6000_ao_subdevice_t *me6000_ao_constructor(uint32_t reg_base, |
| spinlock_t * preload_reg_lock, |
| uint32_t * preload_flags, |
| uint32_t * triggering_flags, |
| int ao_idx, |
| int fifo, |
| int irq, |
| int high_range, |
| struct workqueue_struct *me6000_wq) |
| { |
| me6000_ao_subdevice_t *subdevice; |
| int err; |
| |
| PDEBUG("executed ID=%d.\n", ao_idx); |
| |
| /* Allocate memory for subdevice instance */ |
| subdevice = kmalloc(sizeof(me6000_ao_subdevice_t), GFP_KERNEL); |
| |
| if (!subdevice) { |
| PERROR("Cannot get memory for subdevice instance.\n"); |
| return NULL; |
| } |
| |
| memset(subdevice, 0, sizeof(me6000_ao_subdevice_t)); |
| |
| /* Initialize subdevice base class */ |
| err = me_subdevice_init(&subdevice->base); |
| |
| if (err) { |
| PERROR("Cannot initialize subdevice base class instance.\n"); |
| kfree(subdevice); |
| return NULL; |
| } |
| // Initialize spin locks. |
| spin_lock_init(&subdevice->subdevice_lock); |
| |
| subdevice->preload_reg_lock = preload_reg_lock; |
| subdevice->preload_flags = preload_flags; |
| subdevice->triggering_flags = triggering_flags; |
| |
| /* Store analog output index */ |
| subdevice->ao_idx = ao_idx; |
| |
| /* Store if analog output has fifo */ |
| subdevice->fifo = fifo; |
| |
| if (subdevice->fifo & ME6000_AO_HAS_FIFO) { |
| /* Allocate and initialize circular buffer */ |
| subdevice->circ_buf.mask = ME6000_AO_CIRC_BUF_COUNT - 1; |
| subdevice->circ_buf.buf = |
| (void *)__get_free_pages(GFP_KERNEL, |
| ME6000_AO_CIRC_BUF_SIZE_ORDER); |
| PDEBUG("circ_buf = %p size=%ld\n", subdevice->circ_buf.buf, |
| ME6000_AO_CIRC_BUF_SIZE); |
| |
| if (!subdevice->circ_buf.buf) { |
| PERROR |
| ("Cannot initialize subdevice base class instance.\n"); |
| kfree(subdevice); |
| return NULL; |
| } |
| |
| memset(subdevice->circ_buf.buf, 0, ME6000_AO_CIRC_BUF_SIZE); |
| } else { |
| subdevice->circ_buf.mask = 0; |
| subdevice->circ_buf.buf = NULL; |
| } |
| subdevice->circ_buf.head = 0; |
| subdevice->circ_buf.tail = 0; |
| |
| subdevice->status = ao_status_none; |
| subdevice->ao_control_task_flag = 0; |
| subdevice->timeout.delay = 0; |
| subdevice->timeout.start_time = jiffies; |
| |
| /* Initialize wait queue */ |
| init_waitqueue_head(&subdevice->wait_queue); |
| |
| /* Initialize single value to 0V */ |
| subdevice->single_value = 0x8000; |
| subdevice->single_value_in_fifo = 0x8000; |
| |
| /* Initialize range boarders */ |
| if (high_range) { |
| subdevice->min = ME6000_AO_MIN_RANGE_HIGH; |
| subdevice->max = ME6000_AO_MAX_RANGE_HIGH; |
| } else { |
| subdevice->min = ME6000_AO_MIN_RANGE; |
| subdevice->max = ME6000_AO_MAX_RANGE; |
| } |
| |
| /* Register interrupt service routine */ |
| |
| if (subdevice->fifo & ME6000_AO_HAS_FIFO) { |
| subdevice->irq = irq; |
| if (request_irq(subdevice->irq, me6000_ao_isr, |
| #ifdef IRQF_DISABLED |
| IRQF_DISABLED | IRQF_SHARED, |
| #else |
| SA_INTERRUPT | SA_SHIRQ, |
| #endif |
| ME6000_NAME, subdevice)) { |
| PERROR("Cannot get interrupt line.\n"); |
| PDEBUG("free circ_buf = %p size=%d", |
| subdevice->circ_buf.buf, |
| PAGE_SHIFT << ME6000_AO_CIRC_BUF_SIZE_ORDER); |
| free_pages((unsigned long)subdevice->circ_buf.buf, |
| ME6000_AO_CIRC_BUF_SIZE_ORDER); |
| subdevice->circ_buf.buf = NULL; |
| kfree(subdevice); |
| return NULL; |
| } |
| PINFO("Registered irq=%d.\n", subdevice->irq); |
| } else { |
| subdevice->irq = 0; |
| } |
| |
| /* Initialize registers */ |
| // Only streamed subdevices support interrupts. For the rest this register has no meaning. |
| subdevice->irq_status_reg = reg_base + ME6000_AO_IRQ_STATUS_REG; |
| subdevice->preload_reg = reg_base + ME6000_AO_PRELOAD_REG; |
| |
| if (ao_idx == 0) { |
| subdevice->ctrl_reg = reg_base + ME6000_AO_00_CTRL_REG; |
| subdevice->status_reg = reg_base + ME6000_AO_00_STATUS_REG; |
| subdevice->fifo_reg = reg_base + ME6000_AO_00_FIFO_REG; |
| subdevice->timer_reg = reg_base + ME6000_AO_00_TIMER_REG; |
| subdevice->irq_reset_reg = |
| reg_base + ME6000_AO_00_IRQ_RESET_REG; |
| subdevice->single_reg = reg_base + ME6000_AO_00_SINGLE_REG; |
| } else if (ao_idx == 1) { |
| subdevice->ctrl_reg = reg_base + ME6000_AO_01_CTRL_REG; |
| subdevice->status_reg = reg_base + ME6000_AO_01_STATUS_REG; |
| subdevice->fifo_reg = reg_base + ME6000_AO_01_FIFO_REG; |
| subdevice->timer_reg = reg_base + ME6000_AO_01_TIMER_REG; |
| subdevice->irq_reset_reg = |
| reg_base + ME6000_AO_01_IRQ_RESET_REG; |
| subdevice->single_reg = reg_base + ME6000_AO_01_SINGLE_REG; |
| } else if (ao_idx == 2) { |
| subdevice->ctrl_reg = reg_base + ME6000_AO_02_CTRL_REG; |
| subdevice->status_reg = reg_base + ME6000_AO_02_STATUS_REG; |
| subdevice->fifo_reg = reg_base + ME6000_AO_02_FIFO_REG; |
| subdevice->timer_reg = reg_base + ME6000_AO_02_TIMER_REG; |
| subdevice->irq_reset_reg = |
| reg_base + ME6000_AO_02_IRQ_RESET_REG; |
| subdevice->single_reg = reg_base + ME6000_AO_02_SINGLE_REG; |
| } else if (ao_idx == 3) { |
| subdevice->ctrl_reg = reg_base + ME6000_AO_03_CTRL_REG; |
| subdevice->status_reg = reg_base + ME6000_AO_03_STATUS_REG; |
| subdevice->fifo_reg = reg_base + ME6000_AO_03_FIFO_REG; |
| subdevice->timer_reg = reg_base + ME6000_AO_03_TIMER_REG; |
| subdevice->irq_reset_reg = |
| reg_base + ME6000_AO_03_IRQ_RESET_REG; |
| subdevice->single_reg = reg_base + ME6000_AO_03_SINGLE_REG; |
| } else { |
| subdevice->ctrl_reg = reg_base + ME6000_AO_DUMY; |
| subdevice->fifo_reg = reg_base + ME6000_AO_DUMY; |
| subdevice->timer_reg = reg_base + ME6000_AO_DUMY; |
| subdevice->irq_reset_reg = reg_base + ME6000_AO_DUMY; |
| subdevice->single_reg = reg_base + ME6000_AO_DUMY; |
| |
| subdevice->status_reg = reg_base + ME6000_AO_SINGLE_STATUS_REG; |
| if (ao_idx == 4) { |
| subdevice->single_reg = |
| reg_base + ME6000_AO_04_SINGLE_REG; |
| } else if (ao_idx == 5) { |
| subdevice->single_reg = |
| reg_base + ME6000_AO_05_SINGLE_REG; |
| } else if (ao_idx == 6) { |
| subdevice->single_reg = |
| reg_base + ME6000_AO_06_SINGLE_REG; |
| } else if (ao_idx == 7) { |
| subdevice->single_reg = |
| reg_base + ME6000_AO_07_SINGLE_REG; |
| } else if (ao_idx == 8) { |
| subdevice->single_reg = |
| reg_base + ME6000_AO_08_SINGLE_REG; |
| } else if (ao_idx == 9) { |
| subdevice->single_reg = |
| reg_base + ME6000_AO_09_SINGLE_REG; |
| } else if (ao_idx == 10) { |
| subdevice->single_reg = |
| reg_base + ME6000_AO_10_SINGLE_REG; |
| } else if (ao_idx == 11) { |
| subdevice->single_reg = |
| reg_base + ME6000_AO_11_SINGLE_REG; |
| } else if (ao_idx == 12) { |
| subdevice->single_reg = |
| reg_base + ME6000_AO_12_SINGLE_REG; |
| } else if (ao_idx == 13) { |
| subdevice->single_reg = |
| reg_base + ME6000_AO_13_SINGLE_REG; |
| } else if (ao_idx == 14) { |
| subdevice->single_reg = |
| reg_base + ME6000_AO_14_SINGLE_REG; |
| } else if (ao_idx == 15) { |
| subdevice->single_reg = |
| reg_base + ME6000_AO_15_SINGLE_REG; |
| } else { |
| PERROR_CRITICAL("WRONG SUBDEVICE ID=%d!", ao_idx); |
| me_subdevice_deinit((me_subdevice_t *) subdevice); |
| if (subdevice->fifo) { |
| free_pages((unsigned long)subdevice->circ_buf. |
| buf, ME6000_AO_CIRC_BUF_SIZE_ORDER); |
| } |
| subdevice->circ_buf.buf = NULL; |
| kfree(subdevice); |
| return NULL; |
| } |
| } |
| #ifdef MEDEBUG_DEBUG_REG |
| subdevice->reg_base = reg_base; |
| #endif |
| |
| /* Override base class methods. */ |
| subdevice->base.me_subdevice_destructor = me6000_ao_destructor; |
| subdevice->base.me_subdevice_io_reset_subdevice = |
| me6000_ao_io_reset_subdevice; |
| subdevice->base.me_subdevice_io_single_config = |
| me6000_ao_io_single_config; |
| subdevice->base.me_subdevice_io_single_read = me6000_ao_io_single_read; |
| subdevice->base.me_subdevice_io_single_write = |
| me6000_ao_io_single_write; |
| subdevice->base.me_subdevice_io_stream_config = |
| me6000_ao_io_stream_config; |
| subdevice->base.me_subdevice_io_stream_new_values = |
| me6000_ao_io_stream_new_values; |
| subdevice->base.me_subdevice_io_stream_write = |
| me6000_ao_io_stream_write; |
| subdevice->base.me_subdevice_io_stream_start = |
| me6000_ao_io_stream_start; |
| subdevice->base.me_subdevice_io_stream_status = |
| me6000_ao_io_stream_status; |
| subdevice->base.me_subdevice_io_stream_stop = me6000_ao_io_stream_stop; |
| subdevice->base.me_subdevice_query_number_channels = |
| me6000_ao_query_number_channels; |
| subdevice->base.me_subdevice_query_subdevice_type = |
| me6000_ao_query_subdevice_type; |
| subdevice->base.me_subdevice_query_subdevice_caps = |
| me6000_ao_query_subdevice_caps; |
| subdevice->base.me_subdevice_query_subdevice_caps_args = |
| me6000_ao_query_subdevice_caps_args; |
| subdevice->base.me_subdevice_query_range_by_min_max = |
| me6000_ao_query_range_by_min_max; |
| subdevice->base.me_subdevice_query_number_ranges = |
| me6000_ao_query_number_ranges; |
| subdevice->base.me_subdevice_query_range_info = |
| me6000_ao_query_range_info; |
| subdevice->base.me_subdevice_query_timer = me6000_ao_query_timer; |
| |
| //prepare work queue and work function |
| subdevice->me6000_workqueue = me6000_wq; |
| |
| /* workqueue API changed in kernel 2.6.20 */ |
| #if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) ) |
| INIT_WORK(&subdevice->ao_control_task, me6000_ao_work_control_task, |
| (void *)subdevice); |
| #else |
| INIT_DELAYED_WORK(&subdevice->ao_control_task, |
| me6000_ao_work_control_task); |
| #endif |
| |
| if (subdevice->fifo) { //Set speed |
| outl(ME6000_AO_MIN_CHAN_TICKS - 1, subdevice->timer_reg); |
| subdevice->hardware_stop_delay = HZ / 10; //100ms |
| } |
| |
| return subdevice; |
| } |
| |
| /** @brief Stop presentation. Preserve FIFOs. |
| * |
| * @param instance The subdevice instance (pointer). |
| */ |
| int inline ao_stop_immediately(me6000_ao_subdevice_t * instance) |
| { |
| unsigned long cpu_flags; |
| uint32_t ctrl; |
| int timeout; |
| int i; |
| uint32_t single_mask; |
| |
| single_mask = |
| (instance->ao_idx - ME6000_AO_SINGLE_STATUS_OFFSET < |
| 0) ? 0x0000 : (0x0001 << (instance->ao_idx - |
| ME6000_AO_SINGLE_STATUS_OFFSET)); |
| |
| timeout = |
| (instance->hardware_stop_delay > |
| (HZ / 10)) ? instance->hardware_stop_delay : HZ / 10; |
| for (i = 0; i <= timeout; i++) { |
| if (instance->fifo) { |
| spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| // Stop all actions. No conditions! Block interrupts. Leave FIFO untouched! |
| ctrl = inl(instance->ctrl_reg); |
| ctrl |= |
| ME6000_AO_CTRL_BIT_STOP | |
| ME6000_AO_CTRL_BIT_IMMEDIATE_STOP; |
| ctrl &= |
| ~(ME6000_AO_CTRL_BIT_ENABLE_IRQ | |
| ME6000_AO_CTRL_BIT_ENABLE_EX_TRIG); |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, |
| ctrl); |
| spin_unlock_irqrestore(&instance->subdevice_lock, |
| cpu_flags); |
| |
| if (!(inl(instance->status_reg) & ME6000_AO_STATUS_BIT_FSM)) { // Exit. |
| break; |
| } |
| } else { |
| if (!(inl(instance->status_reg) & single_mask)) { // Exit. |
| break; |
| } |
| } |
| |
| PINFO("<%s> Wait for stop: %d\n", __func__, i); |
| |
| //Still working! |
| set_current_state(TASK_INTERRUPTIBLE); |
| schedule_timeout(1); |
| } |
| |
| if (i > timeout) { |
| PERROR_CRITICAL("FSM IS BUSY!\n"); |
| return ME_ERRNO_INTERNAL; |
| } |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| /** @brief Copy data from circular buffer to fifo (fast) in wraparound. |
| * @note This is time critical function. Checking is done at begining and end only. |
| * @note The is not reasonable way to check how many walues was in FIFO at begining. The count must be managed externaly. |
| * |
| * @param instance The subdevice instance (pointer). |
| * @param count Maximum number of copied data. |
| * @param start_pos Position of the firs value in buffer. |
| * |
| * @return On success: Number of copied data. |
| * @return On error/success: 0. No datas were copied => no data in buffer. |
| * @return On error: -ME_ERRNO_FIFO_BUFFER_OVERFLOW. |
| */ |
| int inline ao_write_data_wraparound(me6000_ao_subdevice_t * instance, int count, |
| int start_pos) |
| { /// @note This is time critical function! |
| uint32_t status; |
| uint32_t value; |
| int pos = |
| (instance->circ_buf.tail + start_pos) & instance->circ_buf.mask; |
| int local_count = count; |
| int i = 1; |
| |
| if (count <= 0) { //Wrong count! |
| return 0; |
| } |
| |
| while (i < local_count) { |
| //Get value from buffer |
| value = *(instance->circ_buf.buf + pos); |
| //Prepare it |
| if (instance->ao_idx & 0x1) { |
| value <<= 16; |
| } |
| //Put value to FIFO |
| outl(value, instance->fifo_reg); |
| //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value); |
| |
| pos++; |
| pos &= instance->circ_buf.mask; |
| if (pos == instance->circ_buf.head) { |
| pos = instance->circ_buf.tail; |
| } |
| i++; |
| } |
| |
| status = inl(instance->status_reg); |
| if (!(status & ME6000_AO_STATUS_BIT_FF)) { //FIFO is full before all datas were copied! |
| PERROR("idx=%d FIFO is full before all datas were copied!\n", |
| instance->ao_idx); |
| return -ME_ERRNO_FIFO_BUFFER_OVERFLOW; |
| } else { //Add last value |
| value = *(instance->circ_buf.buf + pos); |
| if (instance->ao_idx & 0x1) { |
| value <<= 16; |
| } |
| //Put value to FIFO |
| outl(value, instance->fifo_reg); |
| //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value); |
| } |
| |
| PINFO("idx=%d WRAPAROUND LOADED %d values\n", instance->ao_idx, |
| local_count); |
| return local_count; |
| } |
| |
| /** @brief Copy data from software buffer to fifo (fast). |
| * @note This is time critical function. Checking is done at begining and end only. |
| * @note The is not reasonable way to check how many walues was in FIFO at begining. The count must be managed externaly. |
| * |
| * @param instance The subdevice instance (pointer). |
| * @param count Maximum number of copied data. |
| * @param start_pos Position of the firs value in buffer. |
| * |
| * @return On success: Number of copied data. |
| * @return On error/success: 0. No datas were copied => no data in buffer. |
| * @return On error: -ME_ERRNO_FIFO_BUFFER_OVERFLOW. |
| */ |
| int inline ao_write_data(me6000_ao_subdevice_t * instance, int count, |
| int start_pos) |
| { /// @note This is time critical function! |
| uint32_t status; |
| uint32_t value; |
| int pos = |
| (instance->circ_buf.tail + start_pos) & instance->circ_buf.mask; |
| int local_count = count; |
| int max_count; |
| int i = 1; |
| |
| if (count <= 0) { //Wrong count! |
| return 0; |
| } |
| |
| max_count = me_circ_buf_values(&instance->circ_buf) - start_pos; |
| if (max_count <= 0) { //No data to copy! |
| return 0; |
| } |
| |
| if (max_count < count) { |
| local_count = max_count; |
| } |
| |
| while (i < local_count) { |
| //Get value from buffer |
| value = *(instance->circ_buf.buf + pos); |
| //Prepare it |
| if (instance->ao_idx & 0x1) { |
| value <<= 16; |
| } |
| //Put value to FIFO |
| outl(value, instance->fifo_reg); |
| //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value); |
| |
| pos++; |
| pos &= instance->circ_buf.mask; |
| i++; |
| } |
| |
| status = inl(instance->status_reg); |
| if (!(status & ME6000_AO_STATUS_BIT_FF)) { //FIFO is full before all datas were copied! |
| PERROR("idx=%d FIFO is full before all datas were copied!\n", |
| instance->ao_idx); |
| return -ME_ERRNO_FIFO_BUFFER_OVERFLOW; |
| } else { //Add last value |
| value = *(instance->circ_buf.buf + pos); |
| if (instance->ao_idx & 0x1) { |
| value <<= 16; |
| } |
| //Put value to FIFO |
| outl(value, instance->fifo_reg); |
| //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value); |
| } |
| |
| PINFO("idx=%d FAST LOADED %d values\n", instance->ao_idx, local_count); |
| return local_count; |
| } |
| |
| /** @brief Copy data from software buffer to fifo (slow). |
| * @note This is slow function that copy all data from buffer to FIFO with full control. |
| * |
| * @param instance The subdevice instance (pointer). |
| * @param count Maximum number of copied data. |
| * @param start_pos Position of the firs value in buffer. |
| * |
| * @return On success: Number of copied values. |
| * @return On error/success: 0. FIFO was full at begining. |
| * @return On error: -ME_ERRNO_RING_BUFFER_UNDEFFLOW. |
| */ |
| int inline ao_write_data_pooling(me6000_ao_subdevice_t * instance, int count, |
| int start_pos) |
| { /// @note This is slow function! |
| uint32_t status; |
| uint32_t value; |
| int pos = |
| (instance->circ_buf.tail + start_pos) & instance->circ_buf.mask; |
| int local_count = count; |
| int i; |
| int max_count; |
| |
| if (count <= 0) { //Wrong count! |
| PERROR("idx=%d SLOW LOADED: Wrong count!\n", instance->ao_idx); |
| return 0; |
| } |
| |
| max_count = me_circ_buf_values(&instance->circ_buf) - start_pos; |
| if (max_count <= 0) { //No data to copy! |
| PERROR("idx=%d SLOW LOADED: No data to copy!\n", |
| instance->ao_idx); |
| return 0; |
| } |
| |
| if (max_count < count) { |
| local_count = max_count; |
| } |
| |
| for (i = 0; i < local_count; i++) { |
| status = inl(instance->status_reg); |
| if (!(status & ME6000_AO_STATUS_BIT_FF)) { //FIFO is full! |
| return i; |
| } |
| //Get value from buffer |
| value = *(instance->circ_buf.buf + pos); |
| //Prepare it |
| if (instance->ao_idx & 0x1) { |
| value <<= 16; |
| } |
| //Put value to FIFO |
| outl(value, instance->fifo_reg); |
| //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value); |
| |
| pos++; |
| pos &= instance->circ_buf.mask; |
| } |
| |
| PINFO("idx=%d SLOW LOADED %d values\n", instance->ao_idx, local_count); |
| return local_count; |
| } |
| |
| /** @brief Copy data from user space to circular buffer. |
| * @param instance The subdevice instance (pointer). |
| * @param count Number of datas in user space. |
| * @param user_values Buffer's pointer. |
| * |
| * @return On success: Number of copied values. |
| * @return On error: -ME_ERRNO_INTERNAL. |
| */ |
| int inline ao_get_data_from_user(me6000_ao_subdevice_t * instance, int count, |
| int *user_values) |
| { |
| int i, err; |
| int empty_space; |
| int copied; |
| int value; |
| |
| empty_space = me_circ_buf_space(&instance->circ_buf); |
| //We have only this space free. |
| copied = (count < empty_space) ? count : empty_space; |
| for (i = 0; i < copied; i++) { //Copy from user to buffer |
| if ((err = get_user(value, (int *)(user_values + i)))) { |
| PERROR |
| ("idx=%d BUFFER LOADED: get_user(0x%p) return an error: %d\n", |
| instance->ao_idx, user_values + i, err); |
| return -ME_ERRNO_INTERNAL; |
| } |
| /// @note The analog output in me6000 series has size of 16 bits. |
| *(instance->circ_buf.buf + instance->circ_buf.head) = |
| (uint16_t) value; |
| instance->circ_buf.head++; |
| instance->circ_buf.head &= instance->circ_buf.mask; |
| } |
| |
| PINFO("idx=%d BUFFER LOADED %d values\n", instance->ao_idx, copied); |
| return copied; |
| } |
| |
| static void me6000_ao_work_control_task( |
| #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) |
| void *subdevice |
| #else |
| struct work_struct *work |
| #endif |
| ) |
| { |
| me6000_ao_subdevice_t *instance; |
| unsigned long cpu_flags = 0; |
| uint32_t status; |
| uint32_t ctrl; |
| uint32_t synch; |
| int reschedule = 0; |
| int signaling = 0; |
| uint32_t single_mask; |
| |
| #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| #else |
| instance = |
| container_of((void *)work, me6000_ao_subdevice_t, ao_control_task); |
| #endif |
| PINFO("<%s: %ld> executed. idx=%d\n", __func__, jiffies, |
| instance->ao_idx); |
| |
| status = inl(instance->status_reg); |
| PDEBUG_REG("status_reg inl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->status_reg - instance->reg_base, status); |
| |
| /// @note AO_STATUS_BIT_FSM doesn't work as should be for pure single channels (idx>=4) |
| // single_mask = (instance->ao_idx-ME6000_AO_SINGLE_STATUS_OFFSET < 0) ? 0x0000 : (0x0001 << (instance->ao_idx-ME6000_AO_SINGLE_STATUS_OFFSET)); |
| single_mask = *instance->triggering_flags & (0x1 << instance->ao_idx); |
| |
| switch (instance->status) { // Checking actual mode. |
| |
| // Not configured for work. |
| case ao_status_none: |
| break; |
| |
| //This are stable modes. No need to do anything. (?) |
| case ao_status_single_configured: |
| case ao_status_stream_configured: |
| case ao_status_stream_fifo_error: |
| case ao_status_stream_buffer_error: |
| case ao_status_stream_error: |
| PERROR("Shouldn't be running!.\n"); |
| break; |
| |
| // Single modes |
| case ao_status_single_run_wait: |
| case ao_status_single_run: |
| case ao_status_single_end_wait: |
| if (instance->fifo) { // Extra registers. |
| if (!(status & ME6000_AO_STATUS_BIT_FSM)) { // State machine is not working. |
| if (((instance->fifo & ME6000_AO_HAS_FIFO) |
| && (!(status & ME6000_AO_STATUS_BIT_EF))) |
| || (!(instance->fifo & ME6000_AO_HAS_FIFO))) { // Single is in end state. |
| PDEBUG |
| ("Single call has been complited.\n"); |
| |
| // Set correct value for single_read(); |
| instance->single_value = |
| instance->single_value_in_fifo; |
| |
| // Set status as 'ao_status_single_end' |
| instance->status = ao_status_single_end; |
| |
| spin_lock(instance->preload_reg_lock); |
| if ((single_mask) && (*instance->preload_flags & (ME6000_AO_SYNC_HOLD << instance->ao_idx))) { // This is one of synchronous start channels. Set all as triggered. |
| *instance->triggering_flags = |
| 0x00000000; |
| } else { |
| //Set this channel as triggered (none active). |
| *instance->triggering_flags &= |
| ~(0x1 << instance->ao_idx); |
| } |
| spin_unlock(instance->preload_reg_lock); |
| |
| // Signal the end. |
| signaling = 1; |
| // Wait for stop ISM. |
| reschedule = 1; |
| |
| break; |
| } |
| } |
| // Check timeout. |
| if ((instance->timeout.delay) && ((jiffies - instance->timeout.start_time) >= instance->timeout.delay)) { // Timeout |
| PDEBUG("Timeout reached.\n"); |
| // Stop all actions. No conditions! Block interrupts and trigger. Leave FIFO untouched! |
| spin_lock_irqsave(&instance->subdevice_lock, |
| cpu_flags); |
| ctrl = inl(instance->ctrl_reg); |
| ctrl |= |
| ME6000_AO_CTRL_BIT_STOP | |
| ME6000_AO_CTRL_BIT_IMMEDIATE_STOP; |
| ctrl &= |
| ~(ME6000_AO_CTRL_BIT_ENABLE_IRQ | |
| ME6000_AO_CTRL_BIT_ENABLE_EX_TRIG); |
| ctrl &= |
| ~(ME6000_AO_CTRL_BIT_EX_TRIG_EDGE | |
| ME6000_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH); |
| //Disabling FIFO |
| ctrl &= ~ME6000_AO_CTRL_BIT_ENABLE_FIFO; |
| |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - |
| instance->reg_base, ctrl); |
| spin_unlock_irqrestore(&instance-> |
| subdevice_lock, |
| cpu_flags); |
| |
| //Reset interrupt latch |
| inl(instance->irq_reset_reg); |
| |
| spin_lock(instance->preload_reg_lock); |
| //Remove from synchronous start. Block triggering from this output. |
| synch = inl(instance->preload_reg); |
| synch &= |
| ~((ME6000_AO_SYNC_HOLD | |
| ME6000_AO_SYNC_EXT_TRIG) << instance-> |
| ao_idx); |
| if (!(instance->fifo & ME6000_AO_HAS_FIFO)) { // No FIFO - set to single safe mode |
| synch |= |
| ME6000_AO_SYNC_HOLD << instance-> |
| ao_idx; |
| } |
| outl(synch, instance->preload_reg); |
| PDEBUG_REG |
| ("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| synch); |
| //Set this channel as triggered (none active). |
| *instance->triggering_flags &= |
| ~(0x1 << instance->ao_idx); |
| spin_unlock(instance->preload_reg_lock); |
| |
| // Set correct value for single_read(); |
| instance->single_value_in_fifo = |
| instance->single_value; |
| |
| instance->status = ao_status_single_end; |
| |
| // Signal the end. |
| signaling = 1; |
| } |
| } else { // No extra registers. |
| /* |
| if (!(status & single_mask)) |
| {// State machine is not working. |
| PDEBUG("Single call has been complited.\n"); |
| |
| // Set correct value for single_read(); |
| instance->single_value = instance->single_value_in_fifo; |
| |
| // Set status as 'ao_status_single_end' |
| instance->status = ao_status_single_end; |
| |
| // Signal the end. |
| signaling = 1; |
| // Wait for stop ISM. |
| reschedule = 1; |
| |
| break; |
| } |
| */ |
| if (!single_mask) { // Was triggered. |
| PDEBUG("Single call has been complited.\n"); |
| |
| // Set correct value for single_read(); |
| instance->single_value = |
| instance->single_value_in_fifo; |
| |
| // Set status as 'ao_status_single_end' |
| instance->status = ao_status_single_end; |
| |
| // Signal the end. |
| signaling = 1; |
| |
| break; |
| } |
| // Check timeout. |
| if ((instance->timeout.delay) && ((jiffies - instance->timeout.start_time) >= instance->timeout.delay)) { // Timeout |
| PDEBUG("Timeout reached.\n"); |
| |
| spin_lock(instance->preload_reg_lock); |
| //Remove from synchronous start. Block triggering from this output. |
| synch = inl(instance->preload_reg); |
| synch &= |
| ~(ME6000_AO_SYNC_EXT_TRIG << instance-> |
| ao_idx); |
| synch |= |
| ME6000_AO_SYNC_HOLD << instance->ao_idx; |
| |
| outl(synch, instance->preload_reg); |
| PDEBUG_REG |
| ("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| synch); |
| //Set this channel as triggered (none active). |
| *instance->triggering_flags &= |
| ~(0x1 << instance->ao_idx); |
| spin_unlock(instance->preload_reg_lock); |
| |
| // Restore old settings. |
| PDEBUG("Write old value back to register.\n"); |
| outl(instance->single_value, |
| instance->single_reg); |
| PDEBUG_REG |
| ("single_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->single_reg - instance->reg_base, |
| instance->single_value); |
| |
| // Set correct value for single_read(); |
| instance->single_value_in_fifo = |
| instance->single_value; |
| |
| instance->status = ao_status_single_end; |
| |
| // Signal the end. |
| signaling = 1; |
| } |
| } |
| |
| // Wait for stop. |
| reschedule = 1; |
| break; |
| |
| case ao_status_stream_end: |
| if (!(instance->fifo & ME6000_AO_HAS_FIFO)) { // No FIFO |
| PERROR_CRITICAL |
| ("Streaming on single device! This feature is not implemented in this version!\n"); |
| instance->status = ao_status_stream_error; |
| // Signal the end. |
| signaling = 1; |
| break; |
| } |
| case ao_status_single_end: |
| if (instance->fifo) { // Extra registers. |
| if (status & ME6000_AO_STATUS_BIT_FSM) { // State machine is working but the status is set to end. Force stop. |
| |
| // Wait for stop. |
| reschedule = 1; |
| } |
| |
| spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| // Stop all actions. No conditions! Block interrupts and trigger. Leave FIFO untouched! |
| ctrl = inl(instance->ctrl_reg); |
| ctrl |= |
| ME6000_AO_CTRL_BIT_IMMEDIATE_STOP | |
| ME6000_AO_CTRL_BIT_STOP; |
| ctrl &= |
| ~(ME6000_AO_CTRL_BIT_ENABLE_IRQ | |
| ME6000_AO_CTRL_BIT_ENABLE_EX_TRIG); |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, |
| ctrl); |
| spin_unlock_irqrestore(&instance->subdevice_lock, |
| cpu_flags); |
| |
| //Reset interrupt latch |
| inl(instance->irq_reset_reg); |
| } else { // No extra registers. |
| /* |
| if (status & single_mask) |
| {// State machine is working but the status is set to end. Force stop. |
| |
| // Wait for stop. |
| reschedule = 1; |
| } |
| */ |
| } |
| break; |
| |
| // Stream modes |
| case ao_status_stream_run_wait: |
| if (!(instance->fifo & ME6000_AO_HAS_FIFO)) { // No FIFO |
| PERROR_CRITICAL |
| ("Streaming on single device! This feature is not implemented in this version!\n"); |
| instance->status = ao_status_stream_error; |
| // Signal the end. |
| signaling = 1; |
| break; |
| } |
| |
| if (status & ME6000_AO_STATUS_BIT_FSM) { // State machine is working. Waiting for start finish. |
| instance->status = ao_status_stream_run; |
| |
| // Signal end of this step |
| signaling = 1; |
| } else { // State machine is not working. |
| if (!(status & ME6000_AO_STATUS_BIT_EF)) { // FIFO is empty. Procedure has started and finish already! |
| instance->status = ao_status_stream_end; |
| |
| // Signal the end. |
| signaling = 1; |
| // Wait for stop. |
| reschedule = 1; |
| break; |
| } |
| } |
| |
| // Check timeout. |
| if ((instance->timeout.delay) && ((jiffies - instance->timeout.start_time) >= instance->timeout.delay)) { // Timeout |
| PDEBUG("Timeout reached.\n"); |
| // Stop all actions. No conditions! Block interrupts. Leave FIFO untouched! |
| spin_lock_irqsave(&instance->subdevice_lock, cpu_flags); |
| ctrl = inl(instance->ctrl_reg); |
| ctrl |= |
| ME6000_AO_CTRL_BIT_STOP | |
| ME6000_AO_CTRL_BIT_IMMEDIATE_STOP; |
| ctrl &= |
| ~(ME6000_AO_CTRL_BIT_ENABLE_IRQ | |
| ME6000_AO_CTRL_BIT_ENABLE_EX_TRIG); |
| outl(ctrl, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, |
| ctrl); |
| spin_unlock_irqrestore(&instance->subdevice_lock, |
| cpu_flags); |
| |
| //Reset interrupt latch |
| inl(instance->irq_reset_reg); |
| |
| spin_lock(instance->preload_reg_lock); |
| //Remove from synchronous start. Block triggering from this output. |
| synch = inl(instance->preload_reg); |
| synch &= |
| ~((ME6000_AO_SYNC_HOLD | ME6000_AO_SYNC_EXT_TRIG) << |
| instance->ao_idx); |
| outl(synch, instance->preload_reg); |
| PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->preload_reg - instance->reg_base, |
| synch); |
| spin_unlock(instance->preload_reg_lock); |
| |
| instance->status = ao_status_stream_end; |
| |
| // Signal the end. |
| signaling = 1; |
| } |
| // Wait for stop. |
| reschedule = 1; |
| break; |
| |
| case ao_status_stream_run: |
| if (!(instance->fifo & ME6000_AO_HAS_FIFO)) { // No FIFO |
| PERROR_CRITICAL |
| ("Streaming on single device! This feature is not implemented in this version!\n"); |
| instance->status = ao_status_stream_error; |
| // Signal the end. |
| signaling = 1; |
| break; |
| } |
| |
| if (!(status & ME6000_AO_STATUS_BIT_FSM)) { // State machine is not working. This is an error. |
| // BROKEN PIPE! |
| if (!(status & ME6000_AO_STATUS_BIT_EF)) { // FIFO is empty. |
| if (me_circ_buf_values(&instance->circ_buf)) { // Software buffer is not empty. |
| if (instance->stop_data_count && (instance->stop_data_count <= instance->data_count)) { //Finishing work. Requed data shown. |
| PDEBUG |
| ("ISM stoped. No data in FIFO. Buffer is not empty.\n"); |
| instance->status = |
| ao_status_stream_end; |
| } else { |
| PERROR |
| ("Output stream has been broken. ISM stoped. No data in FIFO. Buffer is not empty.\n"); |
| instance->status = |
| ao_status_stream_buffer_error; |
| } |
| } else { // Software buffer is empty. |
| PDEBUG |
| ("ISM stoped. No data in FIFO. Buffer is empty.\n"); |
| instance->status = ao_status_stream_end; |
| } |
| } else { // There are still datas in FIFO. |
| if (me_circ_buf_values(&instance->circ_buf)) { // Software buffer is not empty. |
| PERROR |
| ("Output stream has been broken. ISM stoped but some data in FIFO and buffer.\n"); |
| } else { // Software buffer is empty. |
| PERROR |
| ("Output stream has been broken. ISM stoped but some data in FIFO. Buffer is empty.\n"); |
| } |
| instance->status = ao_status_stream_fifo_error; |
| |
| } |
| |
| // Signal the failure. |
| signaling = 1; |
| break; |
| } |
| // Wait for stop. |
| reschedule = 1; |
| break; |
| |
| case ao_status_stream_end_wait: |
| if (!(instance->fifo & ME6000_AO_HAS_FIFO)) { // No FIFO |
| PERROR_CRITICAL |
| ("Streaming on single device! This feature is not implemented in this version!\n"); |
| instance->status = ao_status_stream_error; |
| // Signal the end. |
| signaling = 1; |
| break; |
| } |
| |
| if (!(status & ME6000_AO_STATUS_BIT_FSM)) { // State machine is not working. Waiting for stop finish. |
| instance->status = ao_status_stream_end; |
| signaling = 1; |
| } |
| // State machine is working. |
| reschedule = 1; |
| break; |
| |
| default: |
| PERROR_CRITICAL("Status is in wrong state (%d)!\n", |
| instance->status); |
| instance->status = ao_status_stream_error; |
| // Signal the end. |
| signaling = 1; |
| break; |
| |
| } |
| |
| if (signaling) { //Signal it. |
| wake_up_interruptible_all(&instance->wait_queue); |
| } |
| |
| if (instance->ao_control_task_flag && reschedule) { // Reschedule task |
| queue_delayed_work(instance->me6000_workqueue, |
| &instance->ao_control_task, 1); |
| } else { |
| PINFO("<%s> Ending control task.\n", __func__); |
| } |
| |
| } |
| |
| static int me6000_ao_query_range_by_min_max(me_subdevice_t * subdevice, |
| int unit, |
| int *min, |
| int *max, int *maxdata, int *range) |
| { |
| me6000_ao_subdevice_t *instance; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if ((*max - *min) < 0) { |
| PERROR("Invalid minimum and maximum values specified.\n"); |
| return ME_ERRNO_INVALID_MIN_MAX; |
| } |
| |
| if ((unit == ME_UNIT_VOLT) || (unit == ME_UNIT_ANY)) { |
| if ((*max <= (instance->max + 1000)) && (*min >= instance->min)) { |
| *min = instance->min; |
| *max = instance->max; |
| *maxdata = ME6000_AO_MAX_DATA; |
| *range = 0; |
| } else { |
| PERROR("No matching range available.\n"); |
| return ME_ERRNO_NO_RANGE; |
| } |
| } else { |
| PERROR("Invalid physical unit specified.\n"); |
| return ME_ERRNO_INVALID_UNIT; |
| } |
| |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me6000_ao_query_number_ranges(me_subdevice_t * subdevice, |
| int unit, int *count) |
| { |
| me6000_ao_subdevice_t *instance; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if ((unit == ME_UNIT_VOLT) || (unit == ME_UNIT_ANY)) { |
| *count = 1; |
| } else { |
| *count = 0; |
| } |
| |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me6000_ao_query_range_info(me_subdevice_t * subdevice, |
| int range, |
| int *unit, |
| int *min, int *max, int *maxdata) |
| { |
| me6000_ao_subdevice_t *instance; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if (range == 0) { |
| *unit = ME_UNIT_VOLT; |
| *min = instance->min; |
| *max = instance->max; |
| *maxdata = ME6000_AO_MAX_DATA; |
| } else { |
| PERROR("Invalid range number specified.\n"); |
| return ME_ERRNO_INVALID_RANGE; |
| } |
| |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me6000_ao_query_timer(me_subdevice_t * subdevice, |
| int timer, |
| int *base_frequency, |
| long long *min_ticks, long long *max_ticks) |
| { |
| me6000_ao_subdevice_t *instance; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if (instance->fifo) { //Streaming device. |
| *base_frequency = ME6000_AO_BASE_FREQUENCY; |
| if (timer == ME_TIMER_ACQ_START) { |
| *min_ticks = ME6000_AO_MIN_ACQ_TICKS; |
| *max_ticks = ME6000_AO_MAX_ACQ_TICKS; |
| } else if (timer == ME_TIMER_CONV_START) { |
| *min_ticks = ME6000_AO_MIN_CHAN_TICKS; |
| *max_ticks = ME6000_AO_MAX_CHAN_TICKS; |
| } |
| } else { //Not streaming device! |
| *base_frequency = 0; |
| *min_ticks = 0; |
| *max_ticks = 0; |
| } |
| |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me6000_ao_query_number_channels(me_subdevice_t * subdevice, |
| int *number) |
| { |
| me6000_ao_subdevice_t *instance; |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| *number = 1; |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me6000_ao_query_subdevice_type(me_subdevice_t * subdevice, |
| int *type, int *subtype) |
| { |
| me6000_ao_subdevice_t *instance; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| *type = ME_TYPE_AO; |
| *subtype = |
| (instance-> |
| fifo & ME6000_AO_HAS_FIFO) ? ME_SUBTYPE_STREAMING : |
| ME_SUBTYPE_SINGLE; |
| |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me6000_ao_query_subdevice_caps(me_subdevice_t * subdevice, int *caps) |
| { |
| me6000_ao_subdevice_t *instance; |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| *caps = |
| ME_CAPS_AO_TRIG_SYNCHRONOUS | ((instance->fifo) ? ME_CAPS_AO_FIFO : |
| ME_CAPS_NONE); |
| |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me6000_ao_query_subdevice_caps_args(struct me_subdevice *subdevice, |
| int cap, int *args, int count) |
| { |
| me6000_ao_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| |
| instance = (me6000_ao_subdevice_t *) subdevice; |
| |
| PDEBUG("executed. idx=%d\n", instance->ao_idx); |
| |
| if (count != 1) { |
| PERROR("Invalid capability argument count.\n"); |
| return ME_ERRNO_INVALID_CAP_ARG_COUNT; |
| } |
| |
| switch (cap) { |
| case ME_CAP_AI_FIFO_SIZE: |
| args[0] = (instance->fifo) ? ME6000_AO_FIFO_COUNT : 0; |
| break; |
| |
| case ME_CAP_AI_BUFFER_SIZE: |
| args[0] = |
| (instance->circ_buf.buf) ? ME6000_AO_CIRC_BUF_COUNT : 0; |
| break; |
| |
| default: |
| PERROR("Invalid capability.\n"); |
| err = ME_ERRNO_INVALID_CAP; |
| args[0] = 0; |
| } |
| |
| return err; |
| } |