From: H Hartley Sweeten Date: Fri, 1 May 2015 21:58:26 +0000 (-0700) Subject: staging: comedi: ni_mio_common: refactor m-series stc register handling X-Git-Tag: firefly_0821_release~176^2~1545^2~760 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=05dd0c9fcb34f8335728a2c4ea7f5bb5829900bc;p=firefly-linux-kernel-4.4.55.git staging: comedi: ni_mio_common: refactor m-series stc register handling For M-Series boards (devpriv->is_m_series), the STC registers need to be remapped. This is currently handled with some big switch statements to convert the STC register offset to the M-Series offset. Some of the registers also need special handling due to differences in the register size on the M-Series boards. Create some lookup tables to handle the remapping of the read and write registers. These are easier to maintain and can contain the register size so that a common function can be used instead of the separate helpers. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/ni_mio_common.c b/drivers/staging/comedi/drivers/ni_mio_common.c index 69d71f328006..ecfd0976a776 100644 --- a/drivers/staging/comedi/drivers/ni_mio_common.c +++ b/drivers/staging/comedi/drivers/ni_mio_common.c @@ -308,262 +308,140 @@ static uint8_t ni_readb(struct comedi_device *dev, int reg) * windowed STC registers to the m series register offsets. */ -static void m_series_stc_writel(struct comedi_device *dev, - uint32_t data, int reg) +struct mio_regmap { + unsigned int mio_reg; + int size; +}; + +static const struct mio_regmap m_series_stc_write_regmap[] = { + [Interrupt_A_Ack_Register] = { M_Offset_Interrupt_A_Ack, 2 }, + [Interrupt_B_Ack_Register] = { M_Offset_Interrupt_B_Ack, 2 }, + [AI_Command_2_Register] = { M_Offset_AI_Command_2, 2 }, + [AO_Command_2_Register] = { M_Offset_AO_Command_2, 2 }, + [G_Command_Register(0)] = { M_Offset_G0_Command, 2 }, + [G_Command_Register(1)] = { M_Offset_G1_Command, 2 }, + [AI_Command_1_Register] = { M_Offset_AI_Command_1, 2 }, + [AO_Command_1_Register] = { M_Offset_AO_Command_1, 2 }, + [DIO_Output_Register] = { 0, 0 }, /* DOES NOT MAP CLEANLY */ + /* + * DIO_Output_Register maps to: + * { M_Offset_Static_Digital_Output, 4 } + * { M_Offset_SCXI_Serial_Data_Out, 1 } + */ + [DIO_Control_Register] = { 0, 0 }, /* DOES NOT MAP CLEANLY */ + [AI_Mode_1_Register] = { M_Offset_AI_Mode_1, 2 }, + [AI_Mode_2_Register] = { M_Offset_AI_Mode_2, 2 }, + [AI_SI_Load_A_Registers] = { M_Offset_AI_SI_Load_A, 4 }, + [AI_SC_Load_A_Registers] = { M_Offset_AI_SC_Load_A, 4 }, + [AI_SI2_Load_A_Register] = { M_Offset_AI_SI2_Load_A, 4 }, + [AI_SI2_Load_B_Register] = { M_Offset_AI_SI2_Load_B, 4 }, + [G_Mode_Register(0)] = { M_Offset_G0_Mode, 2 }, + [G_Mode_Register(1)] = { M_Offset_G1_Mode, 2 }, + [G_Load_A_Register(0)] = { M_Offset_G0_Load_A, 4 }, + [G_Load_B_Register(0)] = { M_Offset_G0_Load_B, 4 }, + [G_Load_A_Register(1)] = { M_Offset_G1_Load_A, 4 }, + [G_Load_B_Register(1)] = { M_Offset_G1_Load_B, 4 }, + [G_Input_Select_Register(0)] = { M_Offset_G0_Input_Select, 2 }, + [G_Input_Select_Register(1)] = { M_Offset_G1_Input_Select, 2 }, + [AO_Mode_1_Register] = { M_Offset_AO_Mode_1, 2 }, + [AO_Mode_2_Register] = { M_Offset_AO_Mode_2, 2 }, + [AO_UI_Load_A_Register] = { M_Offset_AO_UI_Load_A, 4 }, + [AO_BC_Load_A_Register] = { M_Offset_AO_BC_Load_A, 4 }, + [AO_UC_Load_A_Register] = { M_Offset_AO_UC_Load_A, 4 }, + [Clock_and_FOUT_Register] = { M_Offset_Clock_and_FOUT, 2 }, + [IO_Bidirection_Pin_Register] = { M_Offset_IO_Bidirection_Pin, 2 }, + [RTSI_Trig_Direction_Register] = { M_Offset_RTSI_Trig_Direction, 2 }, + [Interrupt_Control_Register] = { M_Offset_Interrupt_Control, 2 }, + [AI_Output_Control_Register] = { M_Offset_AI_Output_Control, 2 }, + [Analog_Trigger_Etc_Register] = { M_Offset_Analog_Trigger_Etc, 2 }, + [AI_START_STOP_Select_Register] = { M_Offset_AI_START_STOP_Select, 2 }, + [AI_Trigger_Select_Register] = { M_Offset_AI_Trigger_Select, 2 }, + [AO_Start_Select_Register] = { M_Offset_AO_Start_Select, 2 }, + [AO_Trigger_Select_Register] = { M_Offset_AO_Trigger_Select, 2 }, + [G_Autoincrement_Register(0)] = { M_Offset_G0_Autoincrement, 2 }, + [G_Autoincrement_Register(1)] = { M_Offset_G1_Autoincrement, 2 }, + [AO_Mode_3_Register] = { M_Offset_AO_Mode_3, 2 }, + [Joint_Reset_Register] = { M_Offset_Joint_Reset, 2 }, + [Interrupt_A_Enable_Register] = { M_Offset_Interrupt_A_Enable, 2 }, + [Interrupt_B_Enable_Register] = { M_Offset_Interrupt_B_Enable, 2 }, + [AI_Personal_Register] = { M_Offset_AI_Personal, 2 }, + [AO_Personal_Register] = { M_Offset_AO_Personal, 2 }, + [RTSI_Trig_A_Output_Register] = { M_Offset_RTSI_Trig_A_Output, 2 }, + [RTSI_Trig_B_Output_Register] = { M_Offset_RTSI_Trig_B_Output, 2 }, + [Configuration_Memory_Clear] = { M_Offset_Configuration_Memory_Clear, + 2 }, + [ADC_FIFO_Clear] = { M_Offset_AI_FIFO_Clear, 2 }, + [DAC_FIFO_Clear] = { M_Offset_AO_FIFO_Clear, 2 }, + [AO_Output_Control_Register] = { M_Offset_AO_Output_Control, 2 }, + [AI_Mode_3_Register] = { M_Offset_AI_Mode_3, 2 }, +}; + +static void m_series_stc_write(struct comedi_device *dev, + unsigned int data, unsigned int reg) { - unsigned offset; + const struct mio_regmap *regmap; - switch (reg) { - case AI_SC_Load_A_Registers: - offset = M_Offset_AI_SC_Load_A; - break; - case AI_SI_Load_A_Registers: - offset = M_Offset_AI_SI_Load_A; - break; - case AO_BC_Load_A_Register: - offset = M_Offset_AO_BC_Load_A; - break; - case AO_UC_Load_A_Register: - offset = M_Offset_AO_UC_Load_A; - break; - case AO_UI_Load_A_Register: - offset = M_Offset_AO_UI_Load_A; - break; - case G_Load_A_Register(0): - offset = M_Offset_G0_Load_A; - break; - case G_Load_A_Register(1): - offset = M_Offset_G1_Load_A; - break; - case G_Load_B_Register(0): - offset = M_Offset_G0_Load_B; - break; - case G_Load_B_Register(1): - offset = M_Offset_G1_Load_B; - break; - default: - dev_warn(dev->class_dev, - "%s: bug! unhandled register=0x%x in switch\n", + if (reg < ARRAY_SIZE(m_series_stc_write_regmap)) { + regmap = &m_series_stc_write_regmap[reg]; + } else { + dev_warn(dev->class_dev, "%s: unhandled register=0x%x\n", __func__, reg); return; } - ni_writel(dev, data, offset); -} - -static void m_series_stc_writew(struct comedi_device *dev, - uint16_t data, int reg) -{ - unsigned offset; - switch (reg) { - case ADC_FIFO_Clear: - offset = M_Offset_AI_FIFO_Clear; - break; - case AI_Command_1_Register: - offset = M_Offset_AI_Command_1; - break; - case AI_Command_2_Register: - offset = M_Offset_AI_Command_2; - break; - case AI_Mode_1_Register: - offset = M_Offset_AI_Mode_1; - break; - case AI_Mode_2_Register: - offset = M_Offset_AI_Mode_2; - break; - case AI_Mode_3_Register: - offset = M_Offset_AI_Mode_3; - break; - case AI_Output_Control_Register: - offset = M_Offset_AI_Output_Control; - break; - case AI_Personal_Register: - offset = M_Offset_AI_Personal; - break; - case AI_SI2_Load_A_Register: - /* this is a 32 bit register on m series boards */ - ni_writel(dev, data, M_Offset_AI_SI2_Load_A); - return; - case AI_SI2_Load_B_Register: - /* this is a 32 bit register on m series boards */ - ni_writel(dev, data, M_Offset_AI_SI2_Load_B); - return; - case AI_START_STOP_Select_Register: - offset = M_Offset_AI_START_STOP_Select; - break; - case AI_Trigger_Select_Register: - offset = M_Offset_AI_Trigger_Select; - break; - case Analog_Trigger_Etc_Register: - offset = M_Offset_Analog_Trigger_Etc; - break; - case AO_Command_1_Register: - offset = M_Offset_AO_Command_1; - break; - case AO_Command_2_Register: - offset = M_Offset_AO_Command_2; - break; - case AO_Mode_1_Register: - offset = M_Offset_AO_Mode_1; - break; - case AO_Mode_2_Register: - offset = M_Offset_AO_Mode_2; - break; - case AO_Mode_3_Register: - offset = M_Offset_AO_Mode_3; - break; - case AO_Output_Control_Register: - offset = M_Offset_AO_Output_Control; - break; - case AO_Personal_Register: - offset = M_Offset_AO_Personal; - break; - case AO_Start_Select_Register: - offset = M_Offset_AO_Start_Select; - break; - case AO_Trigger_Select_Register: - offset = M_Offset_AO_Trigger_Select; - break; - case Clock_and_FOUT_Register: - offset = M_Offset_Clock_and_FOUT; - break; - case Configuration_Memory_Clear: - offset = M_Offset_Configuration_Memory_Clear; - break; - case DAC_FIFO_Clear: - offset = M_Offset_AO_FIFO_Clear; - break; - case DIO_Control_Register: - dev_dbg(dev->class_dev, - "%s: FIXME: register 0x%x does not map cleanly on to m-series boards\n", - __func__, reg); - return; - case G_Autoincrement_Register(0): - offset = M_Offset_G0_Autoincrement; - break; - case G_Autoincrement_Register(1): - offset = M_Offset_G1_Autoincrement; - break; - case G_Command_Register(0): - offset = M_Offset_G0_Command; - break; - case G_Command_Register(1): - offset = M_Offset_G1_Command; - break; - case G_Input_Select_Register(0): - offset = M_Offset_G0_Input_Select; - break; - case G_Input_Select_Register(1): - offset = M_Offset_G1_Input_Select; - break; - case G_Mode_Register(0): - offset = M_Offset_G0_Mode; - break; - case G_Mode_Register(1): - offset = M_Offset_G1_Mode; - break; - case Interrupt_A_Ack_Register: - offset = M_Offset_Interrupt_A_Ack; - break; - case Interrupt_A_Enable_Register: - offset = M_Offset_Interrupt_A_Enable; - break; - case Interrupt_B_Ack_Register: - offset = M_Offset_Interrupt_B_Ack; - break; - case Interrupt_B_Enable_Register: - offset = M_Offset_Interrupt_B_Enable; - break; - case Interrupt_Control_Register: - offset = M_Offset_Interrupt_Control; - break; - case IO_Bidirection_Pin_Register: - offset = M_Offset_IO_Bidirection_Pin; - break; - case Joint_Reset_Register: - offset = M_Offset_Joint_Reset; - break; - case RTSI_Trig_A_Output_Register: - offset = M_Offset_RTSI_Trig_A_Output; - break; - case RTSI_Trig_B_Output_Register: - offset = M_Offset_RTSI_Trig_B_Output; + switch (regmap->size) { + case 4: + ni_writel(dev, data, regmap->mio_reg); break; - case RTSI_Trig_Direction_Register: - offset = M_Offset_RTSI_Trig_Direction; + case 2: + ni_writew(dev, data, regmap->mio_reg); break; - /* - * FIXME: DIO_Output_Register (16 bit reg) is replaced by - * M_Offset_Static_Digital_Output (32 bit) and - * M_Offset_SCXI_Serial_Data_Out (8 bit) - */ default: - dev_warn(dev->class_dev, - "%s: bug! unhandled register=0x%x in switch\n", + dev_warn(dev->class_dev, "%s: unmapped register=0x%x\n", __func__, reg); - return; + break; } - ni_writew(dev, data, offset); } -static uint32_t m_series_stc_readl(struct comedi_device *dev, int reg) +static const struct mio_regmap m_series_stc_read_regmap[] = { + [AI_Status_1_Register] = { M_Offset_AI_Status_1, 2 }, + [AO_Status_1_Register] = { M_Offset_AO_Status_1, 2 }, + [G_Status_Register] = { M_Offset_G01_Status, 2 }, + [AO_Status_2_Register] = { M_Offset_AO_Status_2, 2 }, + [G_HW_Save_Register(0)] = { M_Offset_G0_HW_Save, 4 }, + [G_HW_Save_Register(1)] = { M_Offset_G1_HW_Save, 4 }, + [G_Save_Register(0)] = { M_Offset_G0_Save, 4 }, + [G_Save_Register(1)] = { M_Offset_G1_Save, 4 }, + [Joint_Status_1_Register] = { M_Offset_Joint_Status_1, 2 }, + [DIO_Serial_Input_Register] = { M_Offset_SCXI_Serial_Data_In, 1 }, + [Joint_Status_2_Register] = { M_Offset_Joint_Status_2, 2 }, +}; + +static unsigned int m_series_stc_read(struct comedi_device *dev, + unsigned int reg) { - unsigned offset; + const struct mio_regmap *regmap; - switch (reg) { - case G_HW_Save_Register(0): - offset = M_Offset_G0_HW_Save; - break; - case G_HW_Save_Register(1): - offset = M_Offset_G1_HW_Save; - break; - case G_Save_Register(0): - offset = M_Offset_G0_Save; - break; - case G_Save_Register(1): - offset = M_Offset_G1_Save; - break; - default: - dev_warn(dev->class_dev, - "%s: bug! unhandled register=0x%x in switch\n", + if (reg < ARRAY_SIZE(m_series_stc_read_regmap)) { + regmap = &m_series_stc_read_regmap[reg]; + } else { + dev_warn(dev->class_dev, "%s: unhandled register=0x%x\n", __func__, reg); return 0; } - return ni_readl(dev, offset); -} -static uint16_t m_series_stc_readw(struct comedi_device *dev, int reg) -{ - unsigned offset; - - switch (reg) { - case AI_Status_1_Register: - offset = M_Offset_AI_Status_1; - break; - case AO_Status_1_Register: - offset = M_Offset_AO_Status_1; - break; - case AO_Status_2_Register: - offset = M_Offset_AO_Status_2; - break; - case DIO_Serial_Input_Register: - return ni_readb(dev, M_Offset_SCXI_Serial_Data_In); - case Joint_Status_1_Register: - offset = M_Offset_Joint_Status_1; - break; - case Joint_Status_2_Register: - offset = M_Offset_Joint_Status_2; - break; - case G_Status_Register: - offset = M_Offset_G01_Status; - break; + switch (regmap->size) { + case 4: + return ni_readl(dev, regmap->mio_reg); + case 2: + return ni_readw(dev, regmap->mio_reg); + case 1: + return ni_readb(dev, regmap->mio_reg); default: - dev_warn(dev->class_dev, - "%s: bug! unhandled register=0x%x in switch\n", + dev_warn(dev->class_dev, "%s: unmapped register=0x%x\n", __func__, reg); return 0; } - return ni_readw(dev, offset); } static void ni_stc_writew(struct comedi_device *dev, uint16_t data, int reg) @@ -572,7 +450,7 @@ static void ni_stc_writew(struct comedi_device *dev, uint16_t data, int reg) unsigned long flags; if (devpriv->is_m_series) { - m_series_stc_writew(dev, data, reg); + m_series_stc_write(dev, data, reg); } else { spin_lock_irqsave(&devpriv->window_lock, flags); if (!devpriv->mite && reg < 8) { @@ -590,7 +468,7 @@ static void ni_stc_writel(struct comedi_device *dev, uint32_t data, int reg) struct ni_private *devpriv = dev->private; if (devpriv->is_m_series) { - m_series_stc_writel(dev, data, reg); + m_series_stc_write(dev, data, reg); } else { ni_stc_writew(dev, data >> 16, reg); ni_stc_writew(dev, data & 0xffff, reg + 1); @@ -604,7 +482,7 @@ static uint16_t ni_stc_readw(struct comedi_device *dev, int reg) uint16_t val; if (devpriv->is_m_series) { - val = m_series_stc_readw(dev, reg); + val = m_series_stc_read(dev, reg); } else { spin_lock_irqsave(&devpriv->window_lock, flags); if (!devpriv->mite && reg < 8) { @@ -624,7 +502,7 @@ static uint32_t ni_stc_readl(struct comedi_device *dev, int reg) uint32_t val; if (devpriv->is_m_series) { - val = m_series_stc_readl(dev, reg); + val = m_series_stc_read(dev, reg); } else { val = ni_stc_readw(dev, reg) << 16; val |= ni_stc_readw(dev, reg + 1);