adding video memor=y driver wih DT and sysfs interface to configure video memory

src/drivers/elphel/Makefile

@@ -31,3 +31,4 @@ obj-$(CONFIG_ELPHEL393)           += multi10359.o
 obj-$(CONFIG_ELPHEL393)           += imu_log393.o
 
 obj-$(CONFIG_ELPHEL393)           += cxi2c.o
+obj-$(CONFIG_ELPHEL393)           += x393_videomem.o

src/drivers/elphel/imu_log393.c

@@ -40,7 +40,7 @@
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/of_device.h>
-#include <asm/outercache.h>
+#include <asm/outercache.h>    // TODO: Implement cache operations for the logger !!!!
 #include <asm/cacheflush.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -304,8 +304,7 @@ static u32 bytePtrMask = 0;
 static dma_addr_t logger_phys; ///< physical address of the DMA memory start
 static int logger_fpga_configured = 0;
 static const struct of_device_id elphel393_logger_of_match[];
-/** @brief Global pointer to basic device structure. This pointer is used in debugfs output functions */
-static struct device *g_dev_ptr;
+static struct device *g_dev_ptr; ///< Global pointer to basic device structure. This pointer is used in debugfs output functions
 wait_queue_head_t logger_wait_queue;
 #endif
 
@@ -914,15 +913,11 @@ static ssize_t imu_read(struct file * file, char * buf, size_t count, loff_t *of
     }
 }
 
-/**
- * @brief Handle interrupts from sensor channels. This handler is installed without SA_INTERRUPT
- * flag meaning that interrupts are enabled during processing. Such behavior is recommended in LDD3.
- * @param[in]   irq   interrupt number
- * @param[in]   dev_id pointer to driver's private data structure #jpeg_ptr_t corresponding to
- * the channel which raise interrupt
- * @return \e IRQ_HANDLED if interrupt was processed and \e IRQ_NONE otherwise
- */
-static irqreturn_t logger_irq_handler(int irq, void *dev_id)
+/** Handle interrupts the logger. This handler is installed without SA_INTERRUPT
+ * flag meaning that interrupts are enabled during processing. Such behavior is recommended in LDD3. */
+static irqreturn_t logger_irq_handler(int irq,      ///< [in] interrupt number
+                                      void *dev_id) ///< [in] pointer to driver's private data structure
+                                                    ///< @return \e IRQ_HANDLED if interrupt was processed and \e IRQ_NONE otherwise
 {
     x393_mult_saxi_al_t mult_saxi_dwp = x393_mult_saxi_pointers(MULT_SAXI_CHN);
     if (mult_saxi_dwp.addr32 < logger_offs32){
@@ -1263,8 +1258,7 @@ static struct platform_driver elphel393_logger = {
         },
 };
 
-//module_init(logger_init);
-
+module_platform_driver(elphel393_logger);
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Andrey Filippov <andrey@elphel.com>.");
 MODULE_DESCRIPTION(IMU_MODULE_DESCRIPTION);

src/drivers/elphel/pgm_functions.c

@@ -191,25 +191,15 @@
 #include <linux/fs.h>
 #include <linux/string.h>
 #include <linux/init.h>
-//#include <linux/autoconf.h>
 #include <linux/vmalloc.h>
 
-//#include <asm/system.h>
 #include <asm/byteorder.h> // endians
 #include <asm/io.h>
 
 #include <asm/irq.h>
 #include <linux/delay.h>
-//#include <asm/delay.h>
 #include <asm/uaccess.h>
 #include <elphel/c313a.h>
-//#include <asm/elphel/exifa.h>
-//#include "fpgactrl.h"  // defines port_csp0_addr, port_csp4_addr
-//#include "fpga_sdram.h" // use a single fpga_initSDRAM(void)
-//#include "fpgaconfi2c.h"  //to control clocks
-//#include "cc3x3.h"
-//#include "fpga_io.h"
-//#include "x3x3.h"           // hardware definitions
 #include "framepars.h"
 #include "sensor_common.h"
 #include "multi10359.h"
@@ -218,10 +208,8 @@
 #include "quantization_tables.h"
 #include "latency.h"
 #include "pgm_functions.h"
-//#include "cxdma.h"         // is_dma_on()
 #include "jpeghead.h"      // to program FPGA Huffman tables
-
-#include "legacy_defines.h" // temporarily
+ #include "legacy_defines.h" // temporarily
 #include "sensor_i2c.h"
 
 

src/drivers/elphel/x393_fpga_functions.h

+/***************************************************************************//**
+* @file      x393_fpga_functions.h
+* @brief     Reimplementation of Python methods to program FPGA parameters
+* @copyright Copyright 2016 (C) 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 2 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/>.
+*******************************************************************************/
+//typedef enum {DIRECT,ABSOLUTE,RELATIVE} x393cmd_t;
+#include "x393.h"
+int  setup_sensor_memory (int num_sensor, int frame_sa, int frame_sa_inc, int last_frame_num, int frame_full_width,
+        int window_width, int window_height, int window_left, int window_top, x393cmd_t x393cmd, int frame16);
+int setup_compressor_memory (int num_sensor, int frame_sa, int frame_sa_inc, int last_frame_num, int frame_full_width,
+        int window_width, int window_height, int window_left, int window_top, int byte32, int tile_width, int tile_vstep,
+        int tile_height, int extra_pages, int disable_need, x393cmd_t x393cmd, int frame16);

src/drivers/elphel/x393_videomem.h

+/***************************************************************************//**
+* @file      x393_videomem.h
+* @brief     Driver for the external DDR3 memory of x393 (currently 0.5GB)
+* @copyright Copyright 2016 (C) 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 2 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/>.
+*******************************************************************************/
+ 
+struct elphel_video_buf_t
+{
+    int frame_start[4];      ///< Channel 0 frame start (in bytes)
+    int frame_full_width[4]; ///< Channel 0 frame full width (in bytes). 1 memory page is 2048 bytes (128 bursts)
+    int frame_height[4];     ///< Channel 0 maximal frame height in pixel lines
+    int frames_in_buffer[4]; ///< Number of frames in channel 0 buffer
+
+};

src/include/elphel/c313a.h

@@ -856,8 +856,10 @@
 /// when the 4-bit counter is combined with the software variable to get the full 32-bit frame number.<br/>
 /// Each parameter page includes 927 parameter registers, as well as 97 bit mask ones to speed up updates between frames.<br/>
 /// So if no parameters are changed - nothing to be copied from page to page.
-#define PARS_FRAMES                                  16
-#define PARS_FRAMES_MASK     (PARS_FRAMES-1)         ///< Maximal frame number (15 for NC393)
+#ifndef PARS_FRAMES
+    #define PARS_FRAMES                                  16
+    #define PARS_FRAMES_MASK     (PARS_FRAMES-1)         ///< Maximal frame number (15 for NC393)
+#endif
 /// Keeping the same size of past frames storage as in 353:<br/>
 ///#define PASTPARS_SAVE_ENTRIES       (PARS_FRAMES << 8)     // 2048<br/>
 ///#define PASTPARS_SAVE_ENTRIES_MASK ((PARS_FRAMES << 8)-1)  // 0x7ff

src/include/elphel/driver_numbers.h

@@ -18,6 +18,7 @@
 #define IMAGERAW_MAJOR   131
 #define IMAGEACQ_MAJOR   140
 #define LOGGER_MAJOR     141
+#define VIDEOMEM_MAJOR   142 // implement raw access to memory and/or 16-bit image buffers over membridge interface
 
 
 /// MINORS