staging: comedi: ni_tio_internal: export {read, write)_register()

Move these inline functions out of the header and export them instead.
These functions have pretty generic names, rename them.

Fix the checkpatch.pl issues:
WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
CHECK: Avoid crashing the kernel - try using WARN_ON & recovery code
       rather than BUG() or BUG_ON()

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/ni_tio.c b/drivers/staging/comedi/drivers/ni_tio.c
index 44dea4c..a225279 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_tio.c
+++ b/drivers/staging/comedi/drivers/ni_tio.c
@@ -179,11 +179,38 @@ static bool ni_tio_has_gate2_registers(const struct ni_gpct_device *counter_dev)
        }
 }
 
+/**
+ * ni_tio_write() - Write a TIO register using the driver provided callback.
+ * @counter: struct ni_gpct counter.
+ * @value: the value to write
+ * @reg: the register to write.
+ */
+void ni_tio_write(struct ni_gpct *counter, unsigned int value,
+                 enum ni_gpct_register reg)
+{
+       if (reg < NITIO_NUM_REGS)
+               counter->counter_dev->write_register(counter, value, reg);
+}
+EXPORT_SYMBOL_GPL(ni_tio_write);
+
+/**
+ * ni_tio_read() - Read a TIO register using the driver provided callback.
+ * @counter: struct ni_gpct counter.
+ * @reg: the register to read.
+ */
+unsigned int ni_tio_read(struct ni_gpct *counter, enum ni_gpct_register reg)
+{
+       if (reg < NITIO_NUM_REGS)
+               return counter->counter_dev->read_register(counter, reg);
+       return 0;
+}
+EXPORT_SYMBOL_GPL(ni_tio_read);
+
 static void ni_tio_reset_count_and_disarm(struct ni_gpct *counter)
 {
        unsigned cidx = counter->counter_index;
 
-       write_register(counter, GI_RESET(cidx), NITIO_RESET_REG(cidx));
+       ni_tio_write(counter, GI_RESET(cidx), NITIO_RESET_REG(cidx));
 }
 
 static uint64_t ni_tio_clock_period_ps(const struct ni_gpct *counter,
@@ -240,8 +267,7 @@ static void ni_tio_set_bits_transient(struct ni_gpct *counter,
                spin_lock_irqsave(&counter_dev->regs_lock, flags);
                counter_dev->regs[reg] &= ~mask;
                counter_dev->regs[reg] |= (value & mask);
-               write_register(counter, counter_dev->regs[reg] | transient,
-                              reg);
+               ni_tio_write(counter, counter_dev->regs[reg] | transient, reg);
                mmiowb();
                spin_unlock_irqrestore(&counter_dev->regs_lock, flags);
        }
@@ -736,8 +762,8 @@ static void ni_tio_set_source_subselect(struct ni_gpct *counter,
        default:
                return;
        }
-       write_register(counter, counter_dev->regs[second_gate_reg],
-                      second_gate_reg);
+       ni_tio_write(counter, counter_dev->regs[second_gate_reg],
+                    second_gate_reg);
 }
 
 static int ni_tio_set_clock_src(struct ni_gpct *counter,
@@ -925,7 +951,7 @@ static int ni_660x_set_gate2(struct ni_gpct *counter, unsigned int gate_source)
        counter_dev->regs[gate2_reg] |= GI_GATE2_MODE;
        counter_dev->regs[gate2_reg] &= ~GI_GATE2_SEL_MASK;
        counter_dev->regs[gate2_reg] |= GI_GATE2_SEL(gate2_sel);
-       write_register(counter, counter_dev->regs[gate2_reg], gate2_reg);
+       ni_tio_write(counter, counter_dev->regs[gate2_reg], gate2_reg);
        return 0;
 }
 
@@ -949,7 +975,7 @@ static int ni_m_set_gate2(struct ni_gpct *counter, unsigned int gate_source)
        counter_dev->regs[gate2_reg] |= GI_GATE2_MODE;
        counter_dev->regs[gate2_reg] &= ~GI_GATE2_SEL_MASK;
        counter_dev->regs[gate2_reg] |= GI_GATE2_SEL(gate2_sel);
-       write_register(counter, counter_dev->regs[gate2_reg], gate2_reg);
+       ni_tio_write(counter, counter_dev->regs[gate2_reg], gate2_reg);
        return 0;
 }
 
@@ -994,8 +1020,8 @@ int ni_tio_set_gate_src(struct ni_gpct *counter,
 
                if (chan == NI_GPCT_DISABLED_GATE_SELECT) {
                        counter_dev->regs[gate2_reg] &= ~GI_GATE2_MODE;
-                       write_register(counter, counter_dev->regs[gate2_reg],
-                                      gate2_reg);
+                       ni_tio_write(counter, counter_dev->regs[gate2_reg],
+                                    gate2_reg);
                        return 0;
                }
                if (src & CR_INVERT)
@@ -1049,7 +1075,7 @@ static int ni_tio_set_other_src(struct ni_gpct *counter, unsigned index,
 
        counter_dev->regs[abz_reg] &= ~mask;
        counter_dev->regs[abz_reg] |= (source << shift) & mask;
-       write_register(counter, counter_dev->regs[abz_reg], abz_reg);
+       ni_tio_write(counter, counter_dev->regs[abz_reg], abz_reg);
        return 0;
 }
 
@@ -1248,7 +1274,7 @@ int ni_tio_insn_config(struct comedi_device *dev,
                return 0;
        case INSN_CONFIG_GET_COUNTER_STATUS:
                data[1] = 0;
-               status = read_register(counter, NITIO_SHARED_STATUS_REG(cidx));
+               status = ni_tio_read(counter, NITIO_SHARED_STATUS_REG(cidx));
                if (status & GI_ARMED(cidx)) {
                        data[1] |= COMEDI_COUNTER_ARMED;
                        if (status & GI_COUNTING(cidx))
@@ -1297,9 +1323,9 @@ static unsigned int ni_tio_read_sw_save_reg(struct comedi_device *dev,
         * will be correct since the count value will definitely have latched
         * by then.
         */
-       val = read_register(counter, NITIO_SW_SAVE_REG(cidx));
-       if (val != read_register(counter, NITIO_SW_SAVE_REG(cidx)))
-               val = read_register(counter, NITIO_SW_SAVE_REG(cidx));
+       val = ni_tio_read(counter, NITIO_SW_SAVE_REG(cidx));
+       if (val != ni_tio_read(counter, NITIO_SW_SAVE_REG(cidx)))
+               val = ni_tio_read(counter, NITIO_SW_SAVE_REG(cidx));
 
        return val;
 }
@@ -1336,7 +1362,7 @@ static unsigned ni_tio_next_load_register(struct ni_gpct *counter)
 {
        unsigned cidx = counter->counter_index;
        const unsigned bits =
-               read_register(counter, NITIO_SHARED_STATUS_REG(cidx));
+               ni_tio_read(counter, NITIO_SHARED_STATUS_REG(cidx));
 
        return (bits & GI_NEXT_LOAD_SRC(cidx))
                        ? NITIO_LOADB_REG(cidx)
@@ -1368,19 +1394,19 @@ int ni_tio_insn_write(struct comedi_device *dev,
                 * load register is already selected.
                 */
                load_reg = ni_tio_next_load_register(counter);
-               write_register(counter, data[0], load_reg);
+               ni_tio_write(counter, data[0], load_reg);
                ni_tio_set_bits_transient(counter, NITIO_CMD_REG(cidx),
                                          0, 0, GI_LOAD);
                /* restore load reg */
-               write_register(counter, counter_dev->regs[load_reg], load_reg);
+               ni_tio_write(counter, counter_dev->regs[load_reg], load_reg);
                break;
        case 1:
                counter_dev->regs[NITIO_LOADA_REG(cidx)] = data[0];
-               write_register(counter, data[0], NITIO_LOADA_REG(cidx));
+               ni_tio_write(counter, data[0], NITIO_LOADA_REG(cidx));
                break;
        case 2:
                counter_dev->regs[NITIO_LOADB_REG(cidx)] = data[0];
-               write_register(counter, data[0], NITIO_LOADB_REG(cidx));
+               ni_tio_write(counter, data[0], NITIO_LOADB_REG(cidx));
                break;
        default:
                return -EINVAL;
@@ -1398,7 +1424,7 @@ void ni_tio_init_counter(struct ni_gpct *counter)
 
        /* initialize counter registers */
        counter_dev->regs[NITIO_AUTO_INC_REG(cidx)] = 0x0;
-       write_register(counter, 0x0, NITIO_AUTO_INC_REG(cidx));
+       ni_tio_write(counter, 0x0, NITIO_AUTO_INC_REG(cidx));
 
        ni_tio_set_bits(counter, NITIO_CMD_REG(cidx),
                        ~0, GI_SYNC_GATE);
@@ -1406,10 +1432,10 @@ void ni_tio_init_counter(struct ni_gpct *counter)
        ni_tio_set_bits(counter, NITIO_MODE_REG(cidx), ~0, 0);
 
        counter_dev->regs[NITIO_LOADA_REG(cidx)] = 0x0;
-       write_register(counter, 0x0, NITIO_LOADA_REG(cidx));
+       ni_tio_write(counter, 0x0, NITIO_LOADA_REG(cidx));
 
        counter_dev->regs[NITIO_LOADB_REG(cidx)] = 0x0;
-       write_register(counter, 0x0, NITIO_LOADB_REG(cidx));
+       ni_tio_write(counter, 0x0, NITIO_LOADB_REG(cidx));
 
        ni_tio_set_bits(counter, NITIO_INPUT_SEL_REG(cidx), ~0, 0);
 
@@ -1418,7 +1444,7 @@ void ni_tio_init_counter(struct ni_gpct *counter)
 
        if (ni_tio_has_gate2_registers(counter_dev)) {
                counter_dev->regs[NITIO_GATE2_REG(cidx)] = 0x0;
-               write_register(counter, 0x0, NITIO_GATE2_REG(cidx));
+               ni_tio_write(counter, 0x0, NITIO_GATE2_REG(cidx));
        }
 
        ni_tio_set_bits(counter, NITIO_DMA_CFG_REG(cidx), ~0, 0x0);

diff --git a/drivers/staging/comedi/drivers/ni_tio_internal.h b/drivers/staging/comedi/drivers/ni_tio_internal.h
index 1e795fd..b15b108 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_tio_internal.h
+++ b/drivers/staging/comedi/drivers/ni_tio_internal.h
@@ -160,19 +160,8 @@
 #define GI_TC_INTERRUPT_ENABLE(x)      (((x) % 2) ? BIT(9) : BIT(6))
 #define GI_GATE_INTERRUPT_ENABLE(x)    (((x) % 2) ? BIT(10) : BIT(8))
 
-static inline void write_register(struct ni_gpct *counter, unsigned bits,
-                                 enum ni_gpct_register reg)
-{
-       BUG_ON(reg >= NITIO_NUM_REGS);
-       counter->counter_dev->write_register(counter, bits, reg);
-}
-
-static inline unsigned read_register(struct ni_gpct *counter,
-                                    enum ni_gpct_register reg)
-{
-       BUG_ON(reg >= NITIO_NUM_REGS);
-       return counter->counter_dev->read_register(counter, reg);
-}
+void ni_tio_write(struct ni_gpct *, unsigned int value, enum ni_gpct_register);
+unsigned int ni_tio_read(struct ni_gpct *, enum ni_gpct_register);
 
 static inline bool
 ni_tio_counting_mode_registers_present(const struct ni_gpct_device *counter_dev)

diff --git a/drivers/staging/comedi/drivers/ni_tiocmd.c b/drivers/staging/comedi/drivers/ni_tiocmd.c
index 0546a55..d5ffbb1 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_tiocmd.c
+++ b/drivers/staging/comedi/drivers/ni_tiocmd.c
@@ -342,9 +342,9 @@ static void ni_tio_acknowledge_and_confirm(struct ni_gpct *counter,
                                           int *stale_data)
 {
        unsigned cidx = counter->counter_index;
-       const unsigned short gxx_status = read_register(counter,
+       const unsigned short gxx_status = ni_tio_read(counter,
                                                NITIO_SHARED_STATUS_REG(cidx));
-       const unsigned short gi_status = read_register(counter,
+       const unsigned short gi_status = ni_tio_read(counter,
                                                NITIO_STATUS_REG(cidx));
        unsigned ack = 0;
 
@@ -380,14 +380,14 @@ static void ni_tio_acknowledge_and_confirm(struct ni_gpct *counter,
                        ack |= GI_GATE_INTERRUPT_ACK;
        }
        if (ack)
-               write_register(counter, ack, NITIO_INT_ACK_REG(cidx));
+               ni_tio_write(counter, ack, NITIO_INT_ACK_REG(cidx));
        if (ni_tio_get_soft_copy(counter, NITIO_MODE_REG(cidx)) &
            GI_LOADING_ON_GATE) {
                if (gxx_status & GI_STALE_DATA(cidx)) {
                        if (stale_data)
                                *stale_data = 1;
                }
-               if (read_register(counter, NITIO_STATUS2_REG(cidx)) &
+               if (ni_tio_read(counter, NITIO_STATUS2_REG(cidx)) &
                    GI_PERMANENT_STALE(cidx)) {
                        dev_info(counter->counter_dev->dev->class_dev,
                                 "%s: Gi_Permanent_Stale_Data detected.\n",
@@ -426,7 +426,7 @@ void ni_tio_handle_interrupt(struct ni_gpct *counter,
        switch (counter->counter_dev->variant) {
        case ni_gpct_variant_m_series:
        case ni_gpct_variant_660x:
-               if (read_register(counter, NITIO_DMA_STATUS_REG(cidx)) &
+               if (ni_tio_read(counter, NITIO_DMA_STATUS_REG(cidx)) &
                    GI_DRQ_ERROR) {
                        dev_notice(counter->counter_dev->dev->class_dev,
                                   "%s: Gi_DRQ_Error detected.\n", __func__);