From: H Hartley Sweeten Date: Fri, 1 May 2015 21:58:28 +0000 (-0700) Subject: staging: comedi: ni_mio_common: refactor gpct to stc register handling X-Git-Tag: v4.2-rc1~88^2~758 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cfdb3429da1c481ea8774588ca9268a447108526;p=platform%2Fkernel%2Flinux-exynos.git staging: comedi: ni_mio_common: refactor gpct to stc register handling The NI General Purpose Counter Timer (gpct) registers are mapped to the STC registers with a big switch statement. Create a lookup table to handle the mapping ot the registers. This is easier to maintain. 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 fe7a6a0..ce7bcd2 100644 --- a/drivers/staging/comedi/drivers/ni_mio_common.c +++ b/drivers/staging/comedi/drivers/ni_mio_common.c @@ -3749,103 +3749,66 @@ static void init_ao_67xx(struct comedi_device *dev, struct comedi_subdevice *s) ni_ao_win_outw(dev, 0x0, AO_Later_Single_Point_Updates); } -static unsigned ni_gpct_to_stc_register(enum ni_gpct_register reg) +static const struct mio_regmap ni_gpct_to_stc_regmap[] = { + [NITIO_G0_AUTO_INC] = { G_Autoincrement_Register(0), 2 }, + [NITIO_G1_AUTO_INC] = { G_Autoincrement_Register(1), 2 }, + [NITIO_G0_CMD] = { G_Command_Register(0), 2 }, + [NITIO_G1_CMD] = { G_Command_Register(1), 2 }, + [NITIO_G0_HW_SAVE] = { G_HW_Save_Register(0), 4 }, + [NITIO_G1_HW_SAVE] = { G_HW_Save_Register(1), 4 }, + [NITIO_G0_SW_SAVE] = { G_Save_Register(0), 4 }, + [NITIO_G1_SW_SAVE] = { G_Save_Register(1), 4 }, + [NITIO_G0_MODE] = { G_Mode_Register(0), 2 }, + [NITIO_G1_MODE] = { G_Mode_Register(1), 2 }, + [NITIO_G0_LOADA] = { G_Load_A_Register(0), 4 }, + [NITIO_G1_LOADA] = { G_Load_A_Register(1), 4 }, + [NITIO_G0_LOADB] = { G_Load_B_Register(0), 4 }, + [NITIO_G1_LOADB] = { G_Load_B_Register(1), 4 }, + [NITIO_G0_INPUT_SEL] = { G_Input_Select_Register(0), 2 }, + [NITIO_G1_INPUT_SEL] = { G_Input_Select_Register(1), 2 }, + [NITIO_G0_CNT_MODE] = { M_Offset_G0_Counting_Mode, 2 }, + [NITIO_G1_CNT_MODE] = { M_Offset_G1_Counting_Mode, 2 }, + [NITIO_G0_GATE2] = { M_Offset_G0_Second_Gate, 2 }, + [NITIO_G1_GATE2] = { M_Offset_G1_Second_Gate, 2 }, + [NITIO_G01_STATUS] = { G_Status_Register, 2 }, + [NITIO_G01_RESET] = { Joint_Reset_Register, 2 }, + [NITIO_G01_STATUS1] = { Joint_Status_1_Register, 2 }, + [NITIO_G01_STATUS2] = { Joint_Status_2_Register, 2 }, + [NITIO_G0_DMA_CFG] = { M_Offset_G0_DMA_Config, 2 }, + [NITIO_G1_DMA_CFG] = { M_Offset_G1_DMA_Config, 2 }, + [NITIO_G0_DMA_STATUS] = { M_Offset_G0_DMA_Status, 2 }, + [NITIO_G1_DMA_STATUS] = { M_Offset_G1_DMA_Status, 2 }, + [NITIO_G0_ABZ] = { M_Offset_G0_MSeries_ABZ, 2 }, + [NITIO_G1_ABZ] = { M_Offset_G1_MSeries_ABZ, 2 }, + [NITIO_G0_INT_ACK] = { Interrupt_A_Ack_Register, 2 }, + [NITIO_G1_INT_ACK] = { Interrupt_B_Ack_Register, 2 }, + [NITIO_G0_STATUS] = { AI_Status_1_Register, 2 }, + [NITIO_G1_STATUS] = { AO_Status_1_Register, 2 }, + [NITIO_G0_INT_ENA] = { Interrupt_A_Enable_Register, 2 }, + [NITIO_G1_INT_ENA] = { Interrupt_B_Enable_Register, 2 }, +}; + +static unsigned int ni_gpct_to_stc_register(struct comedi_device *dev, + enum ni_gpct_register reg) { - unsigned stc_register; + const struct mio_regmap *regmap; - switch (reg) { - case NITIO_G0_AUTO_INC: - stc_register = G_Autoincrement_Register(0); - break; - case NITIO_G1_AUTO_INC: - stc_register = G_Autoincrement_Register(1); - break; - case NITIO_G0_CMD: - stc_register = G_Command_Register(0); - break; - case NITIO_G1_CMD: - stc_register = G_Command_Register(1); - break; - case NITIO_G0_HW_SAVE: - stc_register = G_HW_Save_Register(0); - break; - case NITIO_G1_HW_SAVE: - stc_register = G_HW_Save_Register(1); - break; - case NITIO_G0_SW_SAVE: - stc_register = G_Save_Register(0); - break; - case NITIO_G1_SW_SAVE: - stc_register = G_Save_Register(1); - break; - case NITIO_G0_MODE: - stc_register = G_Mode_Register(0); - break; - case NITIO_G1_MODE: - stc_register = G_Mode_Register(1); - break; - case NITIO_G0_LOADA: - stc_register = G_Load_A_Register(0); - break; - case NITIO_G1_LOADA: - stc_register = G_Load_A_Register(1); - break; - case NITIO_G0_LOADB: - stc_register = G_Load_B_Register(0); - break; - case NITIO_G1_LOADB: - stc_register = G_Load_B_Register(1); - break; - case NITIO_G0_INPUT_SEL: - stc_register = G_Input_Select_Register(0); - break; - case NITIO_G1_INPUT_SEL: - stc_register = G_Input_Select_Register(1); - break; - case NITIO_G01_STATUS: - stc_register = G_Status_Register; - break; - case NITIO_G01_RESET: - stc_register = Joint_Reset_Register; - break; - case NITIO_G01_STATUS1: - stc_register = Joint_Status_1_Register; - break; - case NITIO_G01_STATUS2: - stc_register = Joint_Status_2_Register; - break; - case NITIO_G0_INT_ACK: - stc_register = Interrupt_A_Ack_Register; - break; - case NITIO_G1_INT_ACK: - stc_register = Interrupt_B_Ack_Register; - break; - case NITIO_G0_STATUS: - stc_register = AI_Status_1_Register; - break; - case NITIO_G1_STATUS: - stc_register = AO_Status_1_Register; - break; - case NITIO_G0_INT_ENA: - stc_register = Interrupt_A_Enable_Register; - break; - case NITIO_G1_INT_ENA: - stc_register = Interrupt_B_Enable_Register; - break; - default: - pr_err("%s: unhandled register 0x%x in switch.\n", - __func__, reg); - BUG(); + if (reg < ARRAY_SIZE(ni_gpct_to_stc_regmap)) { + regmap = &ni_gpct_to_stc_regmap[reg]; + } else { + dev_warn(dev->class_dev,"%s: unhandled register 0x%x\n", + __func__, reg); return 0; } - return stc_register; + + return regmap->mio_reg; } static void ni_gpct_write_register(struct ni_gpct *counter, unsigned bits, enum ni_gpct_register reg) { struct comedi_device *dev = counter->counter_dev->dev; - unsigned stc_register; + unsigned int stc_register = ni_gpct_to_stc_register(dev, reg); /* bits in the join reset register which are relevant to counters */ static const unsigned gpct_joint_reset_mask = G0_Reset | G1_Reset; static const unsigned gpct_interrupt_a_enable_mask = @@ -3853,31 +3816,20 @@ static void ni_gpct_write_register(struct ni_gpct *counter, unsigned bits, static const unsigned gpct_interrupt_b_enable_mask = G1_Gate_Interrupt_Enable | G1_TC_Interrupt_Enable; + if (stc_register == 0) + return; + switch (reg) { - /* m-series-only registers */ + /* m-series only registers */ case NITIO_G0_CNT_MODE: - ni_writew(dev, bits, M_Offset_G0_Counting_Mode); - break; case NITIO_G1_CNT_MODE: - ni_writew(dev, bits, M_Offset_G1_Counting_Mode); - break; case NITIO_G0_GATE2: - ni_writew(dev, bits, M_Offset_G0_Second_Gate); - break; case NITIO_G1_GATE2: - ni_writew(dev, bits, M_Offset_G1_Second_Gate); - break; case NITIO_G0_DMA_CFG: - ni_writew(dev, bits, M_Offset_G0_DMA_Config); - break; case NITIO_G1_DMA_CFG: - ni_writew(dev, bits, M_Offset_G1_DMA_Config); - break; case NITIO_G0_ABZ: - ni_writew(dev, bits, M_Offset_G0_MSeries_ABZ); - break; case NITIO_G1_ABZ: - ni_writew(dev, bits, M_Offset_G1_MSeries_ABZ); + ni_writew(dev, bits, stc_register); break; /* 32 bit registers */ @@ -3885,26 +3837,24 @@ static void ni_gpct_write_register(struct ni_gpct *counter, unsigned bits, case NITIO_G1_LOADA: case NITIO_G0_LOADB: case NITIO_G1_LOADB: - stc_register = ni_gpct_to_stc_register(reg); ni_stc_writel(dev, bits, stc_register); break; /* 16 bit registers */ case NITIO_G0_INT_ENA: BUG_ON(bits & ~gpct_interrupt_a_enable_mask); - ni_set_bitfield(dev, Interrupt_A_Enable_Register, + ni_set_bitfield(dev, stc_register, gpct_interrupt_a_enable_mask, bits); break; case NITIO_G1_INT_ENA: BUG_ON(bits & ~gpct_interrupt_b_enable_mask); - ni_set_bitfield(dev, Interrupt_B_Enable_Register, + ni_set_bitfield(dev, stc_register, gpct_interrupt_b_enable_mask, bits); break; case NITIO_G01_RESET: BUG_ON(bits & ~gpct_joint_reset_mask); /* fall-through */ default: - stc_register = ni_gpct_to_stc_register(reg); ni_stc_writew(dev, bits, stc_register); } } @@ -3913,29 +3863,28 @@ static unsigned ni_gpct_read_register(struct ni_gpct *counter, enum ni_gpct_register reg) { struct comedi_device *dev = counter->counter_dev->dev; - unsigned stc_register; + unsigned int stc_register = ni_gpct_to_stc_register(dev, reg); + + if (stc_register == 0) + return 0; switch (reg) { /* m-series only registers */ case NITIO_G0_DMA_STATUS: - return ni_readw(dev, M_Offset_G0_DMA_Status); case NITIO_G1_DMA_STATUS: - return ni_readw(dev, M_Offset_G1_DMA_Status); + return ni_readw(dev, stc_register); /* 32 bit registers */ case NITIO_G0_HW_SAVE: case NITIO_G1_HW_SAVE: case NITIO_G0_SW_SAVE: case NITIO_G1_SW_SAVE: - stc_register = ni_gpct_to_stc_register(reg); return ni_stc_readl(dev, stc_register); /* 16 bit registers */ default: - stc_register = ni_gpct_to_stc_register(reg); return ni_stc_readw(dev, stc_register); } - return 0; } static int ni_freq_out_insn_read(struct comedi_device *dev,