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Date: Wed, 20 Jun 2012 19:25:32 -0700
From: H Hartley Sweeten <hartleys@...ionengravers.com>
To: Linux Kernel <linux-kernel@...r.kernel.org>
CC: <devel@...verdev.osuosl.org>, <abbotti@....co.uk>,
<fmhess@...rs.sourceforge.net>, <gregkh@...uxfoundation.org>
Subject: [PATCH 05/12] staging: comedi: s626: remove forward declarations 3
Move the I2C functions up to remove the need for the forward
declarations.
Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc: Ian Abbott <abbotti@....co.uk>
Cc: Frank Mori Hess <fmhess@...rs.sourceforge.net>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/staging/comedi/drivers/s626.c | 124 +++++++++++++++++-----------------
1 file changed, 61 insertions(+), 63 deletions(-)
diff --git a/drivers/staging/comedi/drivers/s626.c b/drivers/staging/comedi/drivers/s626.c
index 1efa2f0..5fcb43a 100644
--- a/drivers/staging/comedi/drivers/s626.c
+++ b/drivers/staging/comedi/drivers/s626.c
@@ -216,8 +216,6 @@ static int s626_ns_to_timer(int *nanosec, int round_mode);
/* internal routines */
static void WriteTrimDAC(struct comedi_device *dev, uint8_t LogicalChan,
uint8_t DacData);
-static uint8_t I2Cread(struct comedi_device *dev, uint8_t addr);
-static uint32_t I2Chandshake(struct comedi_device *dev, uint32_t val);
static void SetDAC(struct comedi_device *dev, uint16_t chan, short dacdata);
static void SendDAC(struct comedi_device *dev, uint32_t val);
@@ -493,6 +491,67 @@ static void DEBIreplace(struct comedi_device *dev, uint16_t addr, uint16_t mask,
DEBItransfer(dev); /* Execute the DEBI Write transfer. */
}
+/* ************** EEPROM ACCESS FUNCTIONS ************** */
+
+static uint32_t I2Chandshake(struct comedi_device *dev, uint32_t val)
+{
+ /* Write I2C command to I2C Transfer Control shadow register. */
+ WR7146(P_I2CCTRL, val);
+
+ /* Upload I2C shadow registers into working registers and wait for */
+ /* upload confirmation. */
+
+ MC_ENABLE(P_MC2, MC2_UPLD_IIC);
+ while (!MC_TEST(P_MC2, MC2_UPLD_IIC))
+ ;
+
+ /* Wait until I2C bus transfer is finished or an error occurs. */
+ while ((RR7146(P_I2CCTRL) & (I2C_BUSY | I2C_ERR)) == I2C_BUSY)
+ ;
+
+ /* Return non-zero if I2C error occurred. */
+ return RR7146(P_I2CCTRL) & I2C_ERR;
+
+}
+
+/* Read uint8_t from EEPROM. */
+static uint8_t I2Cread(struct comedi_device *dev, uint8_t addr)
+{
+ uint8_t rtnval;
+
+ /* Send EEPROM target address. */
+ if (I2Chandshake(dev, I2C_B2(I2C_ATTRSTART, I2CW)
+ /* Byte2 = I2C command: write to I2C EEPROM device. */
+ | I2C_B1(I2C_ATTRSTOP, addr)
+ /* Byte1 = EEPROM internal target address. */
+ | I2C_B0(I2C_ATTRNOP, 0))) { /* Byte0 = Not sent. */
+ /* Abort function and declare error if handshake failed. */
+ DEBUG("I2Cread: error handshake I2Cread a\n");
+ return 0;
+ }
+ /* Execute EEPROM read. */
+ if (I2Chandshake(dev, I2C_B2(I2C_ATTRSTART, I2CR)
+
+ /* Byte2 = I2C */
+ /* command: read */
+ /* from I2C EEPROM */
+ /* device. */
+ |I2C_B1(I2C_ATTRSTOP, 0)
+
+ /* Byte1 receives */
+ /* uint8_t from */
+ /* EEPROM. */
+ |I2C_B0(I2C_ATTRNOP, 0))) { /* Byte0 = Not sent. */
+
+ /* Abort function and declare error if handshake failed. */
+ DEBUG("I2Cread: error handshake I2Cread b\n");
+ return 0;
+ }
+ /* Return copy of EEPROM value. */
+ rtnval = (uint8_t) (RR7146(P_I2CCTRL) >> 16);
+ return rtnval;
+}
+
static unsigned int s626_ai_reg_to_uint(int data)
{
unsigned int tempdata;
@@ -1938,67 +1997,6 @@ static void WriteTrimDAC(struct comedi_device *dev, uint8_t LogicalChan,
| (uint32_t) DacData); /* Include DAC setpoint data. */
}
-/* ************** EEPROM ACCESS FUNCTIONS ************** */
-/* Read uint8_t from EEPROM. */
-
-static uint8_t I2Cread(struct comedi_device *dev, uint8_t addr)
-{
- uint8_t rtnval;
-
- /* Send EEPROM target address. */
- if (I2Chandshake(dev, I2C_B2(I2C_ATTRSTART, I2CW)
- /* Byte2 = I2C command: write to I2C EEPROM device. */
- | I2C_B1(I2C_ATTRSTOP, addr)
- /* Byte1 = EEPROM internal target address. */
- | I2C_B0(I2C_ATTRNOP, 0))) { /* Byte0 = Not sent. */
- /* Abort function and declare error if handshake failed. */
- DEBUG("I2Cread: error handshake I2Cread a\n");
- return 0;
- }
- /* Execute EEPROM read. */
- if (I2Chandshake(dev, I2C_B2(I2C_ATTRSTART, I2CR)
-
- /* Byte2 = I2C */
- /* command: read */
- /* from I2C EEPROM */
- /* device. */
- |I2C_B1(I2C_ATTRSTOP, 0)
-
- /* Byte1 receives */
- /* uint8_t from */
- /* EEPROM. */
- |I2C_B0(I2C_ATTRNOP, 0))) { /* Byte0 = Not sent. */
-
- /* Abort function and declare error if handshake failed. */
- DEBUG("I2Cread: error handshake I2Cread b\n");
- return 0;
- }
- /* Return copy of EEPROM value. */
- rtnval = (uint8_t) (RR7146(P_I2CCTRL) >> 16);
- return rtnval;
-}
-
-static uint32_t I2Chandshake(struct comedi_device *dev, uint32_t val)
-{
- /* Write I2C command to I2C Transfer Control shadow register. */
- WR7146(P_I2CCTRL, val);
-
- /* Upload I2C shadow registers into working registers and wait for */
- /* upload confirmation. */
-
- MC_ENABLE(P_MC2, MC2_UPLD_IIC);
- while (!MC_TEST(P_MC2, MC2_UPLD_IIC))
- ;
-
- /* Wait until I2C bus transfer is finished or an error occurs. */
- while ((RR7146(P_I2CCTRL) & (I2C_BUSY | I2C_ERR)) == I2C_BUSY)
- ;
-
- /* Return non-zero if I2C error occurred. */
- return RR7146(P_I2CCTRL) & I2C_ERR;
-
-}
-
/* Private helper function: Write setpoint to an application DAC channel. */
static void SetDAC(struct comedi_device *dev, uint16_t chan, short dacdata)
--
1.7.11
--
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