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Commit cfdb3429 authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman
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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: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: default avatarIan Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2475c548
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Showing with 62 additions and 113 deletions
drivers/staging/comedi/drivers/ni_mio_common.c
View file @ cfdb3429
......@@ -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,
......
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