added i2c driver from NC353 for IMU and GPS (disabled chn 0)

src/drivers/elphel/Makefile

@@ -29,3 +29,5 @@ obj-$(CONFIG_ELPHEL393)           += pgm_functions.o
 obj-$(CONFIG_ELPHEL393)           += mt9x001.o
 obj-$(CONFIG_ELPHEL393)           += multi10359.o
 obj-$(CONFIG_ELPHEL393)           += imu_log393.o
+
+obj-$(CONFIG_ELPHEL393)           += cxi2c.o

src/drivers/elphel/cci2c.h

+/** @file cci2c.h
+ *
+ * @brief Pre-393 I2c driver for FPGA communicating to sensors, software implementation
+ * Porting to get GPS communication, sesnors in NC393 are handled by sensor_i2c.c driver
+ *
+ * @copyright Copyright (C) 2002-2016 Elphel, Inc
+ *
+ * @par <b>License</b>
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+int i2c_delays (unsigned long delays);
+int i2c_writeData(int n, unsigned char theSlave, unsigned char *theData, int size, int stop);
+int i2c_readData(int n, unsigned char theSlave, unsigned char *theData, int size, int start);
+int i2c_ioctl(struct inode *inode, struct file *file,  unsigned int cmd, unsigned long arg);
+
+#ifdef NC353
+    void i2c_reset_wait(void);
+    void i2c_stop_wait(void);
+    void i2c_run(void);
+    int  i2s_running(void);
+#endif

src/drivers/elphel/imu_log393.c

@@ -38,43 +38,25 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
-//#include <linux/time.h> //?
 #include <linux/platform_device.h>
-//#include <linux/of.h>
 #include <linux/of_device.h>
-
-
 #include <asm/outercache.h>
 #include <asm/cacheflush.h>
-
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/errno.h>
 #include <linux/fs.h>
 #include <linux/string.h>
-//#include <asm/io.h>
-
-
-//#include <asm/irq.h>
-//#include <asm/atomic.h>
-
 #include <asm/delay.h>
 #include <asm/uaccess.h> // copy_*_user
-
-
 #include <elphel/driver_numbers.h>
 #include <elphel/c313a.h>
 #include <elphel/elphel393-mem.h>
 #include "imu_log393.h"
 #include "x393.h"
-#include "legacy_defines.h" // temporarily
+#include "cci2c.h"
+//#include "legacy_defines.h" // temporarily
 
-//#include "x393_macro.h"
-//#include "x393_helpers.h"
-
-
-//#include "x3x3.h"
-//#include "cci2c.h" // i2c to enable CS for the IMU
 
 #if 0
 #define D(x) x
@@ -413,14 +395,11 @@ static void set_logger_params(int which){ // 1 - program IOPINS, 2 - reset first
         enable_IMU=0xfe; // maybe we need to reset it here? bit [1]
 #endif
 
-//TODO: Implement bus 1 i2c for 393
-#ifdef NC353
         i2c_writeData(1,     // int n - bus (0 - to the sensor)
                 i2c_sa,      // unsigned char theSlave,
                 &enable_IMU, //unsigned char *theData,
                 1,           // int size,
                 1);          // int stop (send stop in the end)
-#endif
         D(printk("Sent i2c command in raw mode - address=0x%x, data=0x%x, result=0x%x\n",(int)i2c_sa, (int) enable_IMU, i2c_err));
     }
     if (which & WHICH_RESET_SPI) {
@@ -1289,21 +1268,3 @@ static struct platform_driver elphel393_logger = {
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Andrey Filippov <andrey@elphel.com>.");
 MODULE_DESCRIPTION(IMU_MODULE_DESCRIPTION);
-/*
- DECLARE_TASKLET(tasklet_fpga, tasklet_fpga_function, 0); /// 0 - no arguments for now
-in irq:
-   wake_up_interruptible(&framepars_wait_queue); /// all interrupts, not just frames acquired
-   tasklet_schedule(&tasklet_fpga); /// trigger software interrupt
-void tasklet_fpga_function(unsigned long arg);
-
-void tasklet_fpga_function(unsigned long arg){
-...
-  wake_up_interruptible(&hist_c_wait_queue);     /// wait queue for all the other (R,G2,B) histograms (color)
----
-wait_queue_head_t hist_y_wait_queue;    /// wait queue for the G1 histogram (used as Y)
-wait_event_interruptible (hist_c_wait_queue,GLOBALPARS(G_HIST_C_FRAME)>=offset);
-   init_waitqueue_head(&hist_c_wait_queue);    /// wait queue for all the other (R,G2,B) histograms (color)
-  wake_up_interruptible(&hist_c_wait_queue);     /// wait queue for all the other (R,G2,B) histograms (color)
-
-}
- */

src/include/elphel/c313a.h

@@ -118,6 +118,23 @@
 #define MCPwshared	0x80
 #define MCPwrsynctb	0x100
 #define MCPwrseq	0x200
+#else
+    // Temporarily porting, to use only bus = 1 (GPS, IMU)
+    #define X3X3_I2C_CTRL        0  ///< control/reset i2c
+    #define X3X3_I2C_8_AINC      1  ///< 8bit  registers, autoincement while read/write
+    #define X3X3_I2C_16_AINC     2  ///< 16bit registers, autoincement while read/write
+    #define X3X3_I2C1_8_AINC     3  ///< 8bit  registers, autoincement while read/write (bus 1)
+    #define X3X3_I2C1_16_AINC    4  ///< 16bit registers, autoincement while read/write (bus 1)
+    #define X3X3_I2C_RAW         5  ///< 8bit  registers, no address byte (just slave, then read/write byte(s)
+    #define X3X3_I2C1_RAW        6  ///< 8bit  registers, no address byte (just slave, then read/write byte(s)
+    #define X3X3_I2C_ENABLE      7  ///< enable(/protect) different I2C devices for different types of I2C accesses
+    #define X3X3_I2C_ENABLE_RD   0  ///< bit 0 - enable i2c read
+    #define X3X3_I2C_ENABLE_WR   1  ///< bit 1 - enable i2c write
+    #define X3X3_I2C_ENABLE_RAW  2  ///< bit 2 - enable i2c raw (no address byte)
+    #define X3X3_I2C_ENABLE_8    3  ///< bit 3 - enable i2c 8-bit registers access
+    #define X3X3_I2C_ENABLE_16   4  ///< bit 4 - enable i2c 16-bit registers access
+    #define X3X3_I2C_MAXMINOR    7  ///<
+    #define X3X3_I2C_CHANNELS    2  ///< number of i2c channels (0 is not used in NC393)
 #endif