From 2ffb247691f6e0ecb299ca526d54b868b5338fa0 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 28 May 2014 16:26:47 -0700 Subject: [PATCH] staging: comedi: ni_mio_common: remove forward declaration 24 Move some functions to remove the need for the remaining forward declarations. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- .../staging/comedi/drivers/ni_mio_common.c | 513 +++++++++--------- 1 file changed, 253 insertions(+), 260 deletions(-) diff --git a/drivers/staging/comedi/drivers/ni_mio_common.c b/drivers/staging/comedi/drivers/ni_mio_common.c index c174eac47f7e..93bc362e8329 100644 --- a/drivers/staging/comedi/drivers/ni_mio_common.c +++ b/drivers/staging/comedi/drivers/ni_mio_common.c @@ -194,13 +194,6 @@ static const struct comedi_lrange *const ni_range_lkup[] = { [ai_gain_6143] = &range_bipolar5 }; -#ifndef PCIDMA -static void ni_handle_fifo_half_full(struct comedi_device *dev); -static int ni_ao_fifo_half_empty(struct comedi_device *dev, - struct comedi_subdevice *s); -#endif -static void ni_handle_fifo_dregs(struct comedi_device *dev); - enum aimodes { AIMODE_NONE = 0, AIMODE_HALF_FULL = 1, @@ -771,6 +764,259 @@ static int ni_ao_wait_for_dma_load(struct comedi_device *dev) } #endif /* PCIDMA */ +#ifndef PCIDMA + +static void ni_ao_fifo_load(struct comedi_device *dev, + struct comedi_subdevice *s, int n) +{ + const struct ni_board_struct *board = comedi_board(dev); + struct comedi_async *async = s->async; + struct comedi_cmd *cmd = &async->cmd; + int chan; + int i; + unsigned short d; + u32 packed_data; + int range; + int err = 1; + + chan = async->cur_chan; + for (i = 0; i < n; i++) { + err &= comedi_buf_get(s, &d); + if (err == 0) + break; + + range = CR_RANGE(cmd->chanlist[chan]); + + if (board->reg_type & ni_reg_6xxx_mask) { + packed_data = d & 0xffff; + /* 6711 only has 16 bit wide ao fifo */ + if (board->reg_type != ni_reg_6711) { + err &= comedi_buf_get(s, &d); + if (err == 0) + break; + chan++; + i++; + packed_data |= (d << 16) & 0xffff0000; + } + ni_writel(packed_data, DAC_FIFO_Data_611x); + } else { + ni_writew(d, DAC_FIFO_Data); + } + chan++; + chan %= cmd->chanlist_len; + } + async->cur_chan = chan; + if (err == 0) + async->events |= COMEDI_CB_OVERFLOW; +} + +/* + * There's a small problem if the FIFO gets really low and we + * don't have the data to fill it. Basically, if after we fill + * the FIFO with all the data available, the FIFO is _still_ + * less than half full, we never clear the interrupt. If the + * IRQ is in edge mode, we never get another interrupt, because + * this one wasn't cleared. If in level mode, we get flooded + * with interrupts that we can't fulfill, because nothing ever + * gets put into the buffer. + * + * This kind of situation is recoverable, but it is easier to + * just pretend we had a FIFO underrun, since there is a good + * chance it will happen anyway. This is _not_ the case for + * RT code, as RT code might purposely be running close to the + * metal. Needs to be fixed eventually. + */ +static int ni_ao_fifo_half_empty(struct comedi_device *dev, + struct comedi_subdevice *s) +{ + const struct ni_board_struct *board = comedi_board(dev); + int n; + + n = comedi_buf_read_n_available(s); + if (n == 0) { + s->async->events |= COMEDI_CB_OVERFLOW; + return 0; + } + + n /= sizeof(short); + if (n > board->ao_fifo_depth / 2) + n = board->ao_fifo_depth / 2; + + ni_ao_fifo_load(dev, s, n); + + s->async->events |= COMEDI_CB_BLOCK; + + return 1; +} + +static int ni_ao_prep_fifo(struct comedi_device *dev, + struct comedi_subdevice *s) +{ + const struct ni_board_struct *board = comedi_board(dev); + struct ni_private *devpriv = dev->private; + int n; + + /* reset fifo */ + devpriv->stc_writew(dev, 1, DAC_FIFO_Clear); + if (board->reg_type & ni_reg_6xxx_mask) + ni_ao_win_outl(dev, 0x6, AO_FIFO_Offset_Load_611x); + + /* load some data */ + n = comedi_buf_read_n_available(s); + if (n == 0) + return 0; + + n /= sizeof(short); + if (n > board->ao_fifo_depth) + n = board->ao_fifo_depth; + + ni_ao_fifo_load(dev, s, n); + + return n; +} + +static void ni_ai_fifo_read(struct comedi_device *dev, + struct comedi_subdevice *s, int n) +{ + const struct ni_board_struct *board = comedi_board(dev); + struct ni_private *devpriv = dev->private; + struct comedi_async *async = s->async; + int i; + + if (board->reg_type == ni_reg_611x) { + unsigned short data[2]; + u32 dl; + + for (i = 0; i < n / 2; i++) { + dl = ni_readl(ADC_FIFO_Data_611x); + /* This may get the hi/lo data in the wrong order */ + data[0] = (dl >> 16) & 0xffff; + data[1] = dl & 0xffff; + cfc_write_array_to_buffer(s, data, sizeof(data)); + } + /* Check if there's a single sample stuck in the FIFO */ + if (n % 2) { + dl = ni_readl(ADC_FIFO_Data_611x); + data[0] = dl & 0xffff; + cfc_write_to_buffer(s, data[0]); + } + } else if (board->reg_type == ni_reg_6143) { + unsigned short data[2]; + u32 dl; + + /* This just reads the FIFO assuming the data is present, no checks on the FIFO status are performed */ + for (i = 0; i < n / 2; i++) { + dl = ni_readl(AIFIFO_Data_6143); + + data[0] = (dl >> 16) & 0xffff; + data[1] = dl & 0xffff; + cfc_write_array_to_buffer(s, data, sizeof(data)); + } + if (n % 2) { + /* Assume there is a single sample stuck in the FIFO */ + ni_writel(0x01, AIFIFO_Control_6143); /* Get stranded sample into FIFO */ + dl = ni_readl(AIFIFO_Data_6143); + data[0] = (dl >> 16) & 0xffff; + cfc_write_to_buffer(s, data[0]); + } + } else { + if (n > sizeof(devpriv->ai_fifo_buffer) / + sizeof(devpriv->ai_fifo_buffer[0])) { + comedi_error(dev, "bug! ai_fifo_buffer too small"); + async->events |= COMEDI_CB_ERROR; + return; + } + for (i = 0; i < n; i++) { + devpriv->ai_fifo_buffer[i] = + ni_readw(ADC_FIFO_Data_Register); + } + cfc_write_array_to_buffer(s, devpriv->ai_fifo_buffer, + n * + sizeof(devpriv->ai_fifo_buffer[0])); + } +} + +static void ni_handle_fifo_half_full(struct comedi_device *dev) +{ + const struct ni_board_struct *board = comedi_board(dev); + struct comedi_subdevice *s = &dev->subdevices[NI_AI_SUBDEV]; + int n; + + n = board->ai_fifo_depth / 2; + + ni_ai_fifo_read(dev, s, n); +} +#endif + +/* + Empties the AI fifo +*/ +static void ni_handle_fifo_dregs(struct comedi_device *dev) +{ + const struct ni_board_struct *board = comedi_board(dev); + struct ni_private *devpriv = dev->private; + struct comedi_subdevice *s = &dev->subdevices[NI_AI_SUBDEV]; + unsigned short data[2]; + u32 dl; + unsigned short fifo_empty; + int i; + + if (board->reg_type == ni_reg_611x) { + while ((devpriv->stc_readw(dev, + AI_Status_1_Register) & + AI_FIFO_Empty_St) == 0) { + dl = ni_readl(ADC_FIFO_Data_611x); + + /* This may get the hi/lo data in the wrong order */ + data[0] = (dl >> 16); + data[1] = (dl & 0xffff); + cfc_write_array_to_buffer(s, data, sizeof(data)); + } + } else if (board->reg_type == ni_reg_6143) { + i = 0; + while (ni_readl(AIFIFO_Status_6143) & 0x04) { + dl = ni_readl(AIFIFO_Data_6143); + + /* This may get the hi/lo data in the wrong order */ + data[0] = (dl >> 16); + data[1] = (dl & 0xffff); + cfc_write_array_to_buffer(s, data, sizeof(data)); + i += 2; + } + /* Check if stranded sample is present */ + if (ni_readl(AIFIFO_Status_6143) & 0x01) { + ni_writel(0x01, AIFIFO_Control_6143); /* Get stranded sample into FIFO */ + dl = ni_readl(AIFIFO_Data_6143); + data[0] = (dl >> 16) & 0xffff; + cfc_write_to_buffer(s, data[0]); + } + + } else { + fifo_empty = + devpriv->stc_readw(dev, + AI_Status_1_Register) & AI_FIFO_Empty_St; + while (fifo_empty == 0) { + for (i = 0; + i < + sizeof(devpriv->ai_fifo_buffer) / + sizeof(devpriv->ai_fifo_buffer[0]); i++) { + fifo_empty = + devpriv->stc_readw(dev, + AI_Status_1_Register) & + AI_FIFO_Empty_St; + if (fifo_empty) + break; + devpriv->ai_fifo_buffer[i] = + ni_readw(ADC_FIFO_Data_Register); + } + cfc_write_array_to_buffer(s, devpriv->ai_fifo_buffer, + i * + sizeof(devpriv-> + ai_fifo_buffer[0])); + } + } +} + static void get_last_sample_611x(struct comedi_device *dev) { const struct ni_board_struct *board = comedi_board(dev); @@ -1040,259 +1286,6 @@ static void handle_b_interrupt(struct comedi_device *dev, cfc_handle_events(dev, s); } -#ifndef PCIDMA - -static void ni_ao_fifo_load(struct comedi_device *dev, - struct comedi_subdevice *s, int n) -{ - const struct ni_board_struct *board = comedi_board(dev); - struct comedi_async *async = s->async; - struct comedi_cmd *cmd = &async->cmd; - int chan; - int i; - unsigned short d; - u32 packed_data; - int range; - int err = 1; - - chan = async->cur_chan; - for (i = 0; i < n; i++) { - err &= comedi_buf_get(s, &d); - if (err == 0) - break; - - range = CR_RANGE(cmd->chanlist[chan]); - - if (board->reg_type & ni_reg_6xxx_mask) { - packed_data = d & 0xffff; - /* 6711 only has 16 bit wide ao fifo */ - if (board->reg_type != ni_reg_6711) { - err &= comedi_buf_get(s, &d); - if (err == 0) - break; - chan++; - i++; - packed_data |= (d << 16) & 0xffff0000; - } - ni_writel(packed_data, DAC_FIFO_Data_611x); - } else { - ni_writew(d, DAC_FIFO_Data); - } - chan++; - chan %= cmd->chanlist_len; - } - async->cur_chan = chan; - if (err == 0) - async->events |= COMEDI_CB_OVERFLOW; -} - -/* - * There's a small problem if the FIFO gets really low and we - * don't have the data to fill it. Basically, if after we fill - * the FIFO with all the data available, the FIFO is _still_ - * less than half full, we never clear the interrupt. If the - * IRQ is in edge mode, we never get another interrupt, because - * this one wasn't cleared. If in level mode, we get flooded - * with interrupts that we can't fulfill, because nothing ever - * gets put into the buffer. - * - * This kind of situation is recoverable, but it is easier to - * just pretend we had a FIFO underrun, since there is a good - * chance it will happen anyway. This is _not_ the case for - * RT code, as RT code might purposely be running close to the - * metal. Needs to be fixed eventually. - */ -static int ni_ao_fifo_half_empty(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - const struct ni_board_struct *board = comedi_board(dev); - int n; - - n = comedi_buf_read_n_available(s); - if (n == 0) { - s->async->events |= COMEDI_CB_OVERFLOW; - return 0; - } - - n /= sizeof(short); - if (n > board->ao_fifo_depth / 2) - n = board->ao_fifo_depth / 2; - - ni_ao_fifo_load(dev, s, n); - - s->async->events |= COMEDI_CB_BLOCK; - - return 1; -} - -static int ni_ao_prep_fifo(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - const struct ni_board_struct *board = comedi_board(dev); - struct ni_private *devpriv = dev->private; - int n; - - /* reset fifo */ - devpriv->stc_writew(dev, 1, DAC_FIFO_Clear); - if (board->reg_type & ni_reg_6xxx_mask) - ni_ao_win_outl(dev, 0x6, AO_FIFO_Offset_Load_611x); - - /* load some data */ - n = comedi_buf_read_n_available(s); - if (n == 0) - return 0; - - n /= sizeof(short); - if (n > board->ao_fifo_depth) - n = board->ao_fifo_depth; - - ni_ao_fifo_load(dev, s, n); - - return n; -} - -static void ni_ai_fifo_read(struct comedi_device *dev, - struct comedi_subdevice *s, int n) -{ - const struct ni_board_struct *board = comedi_board(dev); - struct ni_private *devpriv = dev->private; - struct comedi_async *async = s->async; - int i; - - if (board->reg_type == ni_reg_611x) { - unsigned short data[2]; - u32 dl; - - for (i = 0; i < n / 2; i++) { - dl = ni_readl(ADC_FIFO_Data_611x); - /* This may get the hi/lo data in the wrong order */ - data[0] = (dl >> 16) & 0xffff; - data[1] = dl & 0xffff; - cfc_write_array_to_buffer(s, data, sizeof(data)); - } - /* Check if there's a single sample stuck in the FIFO */ - if (n % 2) { - dl = ni_readl(ADC_FIFO_Data_611x); - data[0] = dl & 0xffff; - cfc_write_to_buffer(s, data[0]); - } - } else if (board->reg_type == ni_reg_6143) { - unsigned short data[2]; - u32 dl; - - /* This just reads the FIFO assuming the data is present, no checks on the FIFO status are performed */ - for (i = 0; i < n / 2; i++) { - dl = ni_readl(AIFIFO_Data_6143); - - data[0] = (dl >> 16) & 0xffff; - data[1] = dl & 0xffff; - cfc_write_array_to_buffer(s, data, sizeof(data)); - } - if (n % 2) { - /* Assume there is a single sample stuck in the FIFO */ - ni_writel(0x01, AIFIFO_Control_6143); /* Get stranded sample into FIFO */ - dl = ni_readl(AIFIFO_Data_6143); - data[0] = (dl >> 16) & 0xffff; - cfc_write_to_buffer(s, data[0]); - } - } else { - if (n > sizeof(devpriv->ai_fifo_buffer) / - sizeof(devpriv->ai_fifo_buffer[0])) { - comedi_error(dev, "bug! ai_fifo_buffer too small"); - async->events |= COMEDI_CB_ERROR; - return; - } - for (i = 0; i < n; i++) { - devpriv->ai_fifo_buffer[i] = - ni_readw(ADC_FIFO_Data_Register); - } - cfc_write_array_to_buffer(s, devpriv->ai_fifo_buffer, - n * - sizeof(devpriv->ai_fifo_buffer[0])); - } -} - -static void ni_handle_fifo_half_full(struct comedi_device *dev) -{ - const struct ni_board_struct *board = comedi_board(dev); - struct comedi_subdevice *s = &dev->subdevices[NI_AI_SUBDEV]; - int n; - - n = board->ai_fifo_depth / 2; - - ni_ai_fifo_read(dev, s, n); -} -#endif - -/* - Empties the AI fifo -*/ -static void ni_handle_fifo_dregs(struct comedi_device *dev) -{ - const struct ni_board_struct *board = comedi_board(dev); - struct ni_private *devpriv = dev->private; - struct comedi_subdevice *s = &dev->subdevices[NI_AI_SUBDEV]; - unsigned short data[2]; - u32 dl; - unsigned short fifo_empty; - int i; - - if (board->reg_type == ni_reg_611x) { - while ((devpriv->stc_readw(dev, - AI_Status_1_Register) & - AI_FIFO_Empty_St) == 0) { - dl = ni_readl(ADC_FIFO_Data_611x); - - /* This may get the hi/lo data in the wrong order */ - data[0] = (dl >> 16); - data[1] = (dl & 0xffff); - cfc_write_array_to_buffer(s, data, sizeof(data)); - } - } else if (board->reg_type == ni_reg_6143) { - i = 0; - while (ni_readl(AIFIFO_Status_6143) & 0x04) { - dl = ni_readl(AIFIFO_Data_6143); - - /* This may get the hi/lo data in the wrong order */ - data[0] = (dl >> 16); - data[1] = (dl & 0xffff); - cfc_write_array_to_buffer(s, data, sizeof(data)); - i += 2; - } - /* Check if stranded sample is present */ - if (ni_readl(AIFIFO_Status_6143) & 0x01) { - ni_writel(0x01, AIFIFO_Control_6143); /* Get stranded sample into FIFO */ - dl = ni_readl(AIFIFO_Data_6143); - data[0] = (dl >> 16) & 0xffff; - cfc_write_to_buffer(s, data[0]); - } - - } else { - fifo_empty = - devpriv->stc_readw(dev, - AI_Status_1_Register) & AI_FIFO_Empty_St; - while (fifo_empty == 0) { - for (i = 0; - i < - sizeof(devpriv->ai_fifo_buffer) / - sizeof(devpriv->ai_fifo_buffer[0]); i++) { - fifo_empty = - devpriv->stc_readw(dev, - AI_Status_1_Register) & - AI_FIFO_Empty_St; - if (fifo_empty) - break; - devpriv->ai_fifo_buffer[i] = - ni_readw(ADC_FIFO_Data_Register); - } - cfc_write_array_to_buffer(s, devpriv->ai_fifo_buffer, - i * - sizeof(devpriv-> - ai_fifo_buffer[0])); - } - } -} - static void ni_ai_munge(struct comedi_device *dev, struct comedi_subdevice *s, void *data, unsigned int num_bytes, unsigned int chan_index) -- 2.34.1