spi_busnum_to_master(0) return NULL

Jerffsan 2010-09-19 05:32:59

在6410的开发板Linux环境下spi_busnum_to_master（0） return NULL,
我把kernel下的内核中的spi编入zImage文件，同时在arch/arm/mach-s3c6410的mach-s3c6410.c
中的s3c_device_spi1 & s3c_device_spi0都编入内核中

请高手指点spi_busnum_to_master为什么返回NULL，我应该如何解决，或讲解些方法
怎么去定位问题出现在哪里？谢谢！

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Jerffsan 2010-09-21

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/dev下面没有生成spidev*.*设备节点，应该怎么解决？

Jerffsan 2010-09-20

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enale SPI_MASTER SpiDev 两个驱动，但是spi_busnum_to_master 依旧返回空指针

Jerffsan 2010-09-20

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/sys/class/spidev 目录下为空？为什么

全志R40平台的tinav2.1系统下打开SPI2接口 1、（可选修改） Q:\r40_tinav2.1\spi20_r40_tinav2.1\lichee\brandy\build.sh build_uboot() { if [ "x${PLATFORM}" = "xsun50iw1p1" ] || \ [ "x${PLATFORM}" = "xsun50iw2p1" ] || \ [ "x${PLATFORM}" = "xsun50iw6p1" ] || \ [ "x${PLATFORM}" = "xsun50iw3p1" ] || \ [ "x${PLATFORM}" = "xsun8iw12p1" ] || \ [ "x${PLATFORM}" = "xsun8iw10p1" ] || \ [ "x${PLATFORM}" = "xsun8iw11p1" ]; then cd u-boot-2014.07/ else cd u-boot-2011.09/ fi make distclean if [ "x$MODE" = "xota_test" ] ; then export "SUNXI_MODE=ota_test" fi make ${PLATFORM}_config make -j16 #make spl #make fes if [ ${PLATFORM} = "sun8iw11p1" ]; then make distclean make ${PLATFORM}_nor_config make -j16 #make spl #make fes fi cd - 1>/dev/null } 2、 Q:\r40_tinav2.1\spi20_r40_tinav2.1\lichee\linux-3.10\drivers\spi\spidev.c static struct spi_driver spidev_spi_driver = { .driver = { .name = "spidev", .owner = THIS_MODULE, .of_match_table = of_match_ptr(spidev_dt_ids), }, .probe = spidev_probe, .remove = spidev_remove, /* NOTE: suspend/resume methods are not necessary here. * We don't do anything except pass the requests to/from * the underlying controller. The refrigerator handles * most issues; the controller driver handles the rest. */ }; 3、验证APP程序： Q:\r40_tinav2.1\spi20_r40_tinav2.1\package\allwinner\spidev20_test\Makefile ############################################## # OpenWrt Makefile for helloworld program # # # Most of the variables used here are defined in # the include directives below. We just need to # specify a basic description of the package, # where to build our program, where to find # the source files, and where to install the # compiled program on the router. # # Be very careful of spacing in this file. # Indents should be tabs, not spaces, and # there should be no trailing whitespace in # lines that are not commented. # ############################################## include $(TOPDIR)/rules.mk # Name and release number of this package PKG_NAME:=spidev20_test PKG_VERSION:=0.0.1 PKG_RELEASE:=1 # This specifies the directory where we're going to build the program. # The root build directory, $(BUILD_DIR), is by default the build_mipsel # directory in your OpenWrt SDK directory PKG_BUILD_DIR := $(COMPILE_DIR)/$(PKG_NAME) include $(BUILD_DIR)/package.mk # Specify package information for this program. # The variables defined here should be self explanatory. # If you are running Kamikaze, delete the DESCRIPTION # variable below and uncomment the Kamikaze define # directive for the description below define Package/spidev20_test SECTION:=utils CATEGORY:=Allwinner TITLE:=spidev20_test just test the SPI2 interface DEPENDS:=+libpthread endef # Uncomment portion below for Kamikaze and delete DESCRIPTION variable above define Package/spidev20_test/description If you can't figure out what this program does, you're probably brain-dead and need immediate medical attention. endef # Specify what needs to be done to prepare for building the package. # In our case, we need to copy the source files to the build directory. # This is NOT the default. The default uses the PKG_SOURCE_URL and the # PKG_SOURCE which is not defined here to download the source from the web. # In order to just build a simple program that we have just written, it is # much easier to do it this way. define Build/Prepare mkdir -p $(PKG_BUILD_DIR) $(CP) ./src/* $(PKG_BUILD_DIR)/ endef define Build/Configure endef define Build/Compile $(MAKE) -C $(PKG_BUILD_DIR) \ CC="$(TARGET_CC)" \ CFLAGS="$(TARGET_CFLAGS)" -Wall \ LDFLAGS="$(TARGET_LDFLAGS)" \ LIBS="-lpthread" \ all endef # We do not need to define Build/Configure or Build/Compile directives # The defaults are appropriate for compiling a simple program such as this one # Specify where and how to install the program. Since we only have one file, # the helloworld executable, install it by copying it to the /bin directory on # the router. The $(1) variable represents the root directory on the router running # OpenWrt. The $(INSTALL_DIR) variable contains a command to prepare the install # directory if it does not already exist. Likewise $(INSTALL_BIN) contains the # command to copy the binary file from its current location (in our case the build # directory) to the install directory. define Package/spidev20_test/install $(INSTALL_DIR) $(1)/bin $(INSTALL_BIN) $(PKG_BUILD_DIR)/spidev20_test $(1)/bin/ endef # This line executes the necessary commands to compile our program. # The above define directives specify all the information needed, but this # line calls BuildPackage which in turn actually uses this information to # build a package. $(eval $(call BuildPackage,spidev20_test)) Q:\r40_tinav2.1\spi20_r40_tinav2.1\package\allwinner\spidev20_test\src\Makefile TARGET = spidev20_test INCLUDES += -I. -Icommon/ LIBS += -lpthread -lm -lrt SRCS = spidev20_test.c OBJS = $(SRCS:.c=.o) %.o: %.c $(CC) $(CFLAGS) $(INCLUDES) -c -o $@ $< $(TARGET): $(OBJS) $(CC) -o $@ $(OBJS) $(LIBS) $(LDFLAGS) all:$(TARGET) clean: rm -rf $(TARGET) *.o *.a *~ cd common && rm -f *.o *.a *.bak *~ .depend Q:\r40_tinav2.1\spi20_r40_tinav2.1\package\allwinner\spidev20_test\src\spidev20_test.c /* * SPI testing utility (using spidev driver) * * Copyright (c) 2007 MontaVista Software, Inc. * Copyright (c) 2007 Anton Vorontsov * * 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. * * Cross-compile with cross-gcc -I/path/to/cross-kernel/include */ #include #include #include #include #include #include #include #include #include spi/spidev.h> #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) static void pabort(const char *s) { perror(s); abort(); } //static const char *device = "/dev/spidev0.0"; //static const char *device = "/dev/spidev0.1"; static const char *device = "/dev/spidev2.0"; static uint8_t mode; static uint8_t bits = 8; static uint32_t speed = 500000; static uint16_t delay; static void transfer(int fd) { int ret; //uint8_t tx[] = { // 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 0x40, 0x00, 0x00, 0x00, 0x00, 0x95, // 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 0xDE, 0xAD, 0xBE, 0xEF, 0xBA, 0xAD, // 0xF0, 0x0D, //}; // CityBrand WelCome U! uint8_t tx[] = { 0x43, 0x69, 0x74, 0x79, 0x42, 0x72, 0x61, 0x6E, 0x64, 0x20, 0x57, 0x65, 0x6C, 0x43, 0x6F, 0x6D, 0x65, 0x20, 0x55, 0x21, 0x43, 0x69, 0x74, 0x79, 0x42, 0x72, 0x61, 0x6E, 0x64, 0x20, 0x57, 0x65, 0x6C, 0x43, 0x6F, 0x6D, 0x65, 0x20, 0x55, 0x21, 0x43, 0x69, 0x74, 0x79, 0x42, 0x72, 0x61, 0x6E, 0x64, 0x20, 0x57, 0x65, 0x6C, 0x43, 0x6F, 0x6D, 0x65, 0x20, 0x55, 0x21, }; uint8_t rx[ARRAY_SIZE(tx)] = {0, }; struct spi_ioc_transfer tr = { .tx_buf = (unsigned long)tx, .rx_buf = (unsigned long)rx, .len = ARRAY_SIZE(tx), .delay_usecs = delay, .speed_hz = speed, .bits_per_word = bits, }; ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr;); if (ret < 1) pabort("can't send spi message"); for (ret = 0; ret < ARRAY_SIZE(tx); ret++) { //if (!(ret % 6)) // puts(" "); //printf("%.2X ", rx[ret]); if (!(ret % 20)){ puts("\n"); } printf("%c", rx[ret]); } //puts(""); puts("\n"); } static void print_usage(const char *prog) { printf("Usage: %s [-DsbdlHOLC3]\n", prog); puts(" -D --device device to use (default /dev/spidev1.1)\n" " -s --speed max speed (Hz)\n" " -d --delay delay (usec)\n" " -b --bpw bits per word \n" " -l --loop loopback\n" " -H --cpha clock phase\n" " -O --cpol clock polarity\n" " -L --lsb least significant bit first\n" " -C --cs-high chip select active high\n" " -3 --3wire SI/SO signals shared\n"); exit(1); } static void parse_opts(int argc, char *argv[]) { while (1) { static const struct option lopts[] = { { "device", 1, 0, 'D' }, { "speed", 1, 0, 's' }, { "delay", 1, 0, 'd' }, { "bpw", 1, 0, 'b' }, { "loop", 0, 0, 'l' }, { "cpha", 0, 0, 'H' }, { "cpol", 0, 0, 'O' }, { "lsb", 0, 0, 'L' }, { "cs-high", 0, 0, 'C' }, { "3wire", 0, 0, '3' }, { "no-cs", 0, 0, 'N' }, { "ready", 0, 0, 'R' }, { NULL, 0, 0, 0 }, }; int c; c = getopt_long(argc, argv, "D:s:d:b:lHOLC3NR", lopts, NULL); if (c == -1) break; switch (c) { case 'D': device = optarg; break; case 's': speed = atoi(optarg); break; case 'd': delay = atoi(optarg); break; case 'b': bits = atoi(optarg); break; case 'l': mode |= SPI_LOOP; break; case 'H': mode |= SPI_CPHA; break; case 'O': mode |= SPI_CPOL; break; case 'L': mode |= SPI_LSB_FIRST; break; case 'C': mode |= SPI_CS_HIGH; break; case '3': mode |= SPI_3WIRE; break; case 'N': mode |= SPI_NO_CS; break; case 'R': mode |= SPI_READY; break; default: print_usage(argv[0]); break; } } } int main(int argc, char *argv[]) { int ret = 0; int fd; parse_opts(argc, argv); fd = open(device, O_RDWR); if (fd < 0) pabort("can't open device"); /* * spi mode */ ret = ioctl(fd, SPI_IOC_WR_MODE, &mode;); if (ret == -1) pabort("can't set spi mode"); ret = ioctl(fd, SPI_IOC_RD_MODE, &mode;); if (ret == -1) pabort("can't get spi mode"); /* * bits per word */ ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits;); if (ret == -1) pabort("can't set bits per word"); ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits;); if (ret == -1) pabort("can't get bits per word"); /* * max speed hz */ ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed;); if (ret == -1) pabort("can't set max speed hz"); ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed;); if (ret == -1) pabort("can't get max speed hz"); printf("spi mode: %d\n", mode); printf("bits per word: %d\n", bits); printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000); transfer(fd); close(fd); return ret; } 4、修改配置文件： Q:\r40_tinav2.1\spi20_r40_tinav2.1\target\allwinner\azalea-m2ultra\configs\sys_config.fex [jtag_para] jtag_enable = 1 jtag_ms = port:PB14<3> jtag_ck = port:PB15<3> jtag_do = port:PB16<3> jtag_di = port:PB17<3> 修改为： [jtag_para] jtag_enable = 0 ;jtag_ms = port:PB14<3> ;jtag_ck = port:PB15<3> ;jtag_do = port:PB16<3> ;jtag_di = port:PB17<3> ;---------------------------------------------------------------------------------- ;SPI controller configuration ;---------------------------------------------------------------------------------- [spi0] spi0_used = 0 spi0_cs_number = 2 spi0_cs_bitmap = 3 spi0_cs0 = port:PC23<3><1> spi0_cs1 = port:PI14<2><1> spi0_sclk = port:PC2<3> spi0_mosi = port:PC0<3> spi0_miso = port:PC1<3> [spi1] spi1_used = 0 spi1_cs_number = 2 spi1_cs_bitmap = 3 spi1_cs0 = port:PA0<3><1> spi1_cs1 = port:PA4<3><1> spi1_sclk = port:PA1<3> spi1_mosi = port:PA2<3> spi1_miso = port:PA3<3> [spi2] spi2_used = 0 spi2_cs_number = 2 spi2_cs_bitmap = 3 spi2_cs0 = port:PB14<2><1> spi2_cs1 = port:PB13<2><1> spi2_sclk = port:PB15<2> spi2_mosi = port:PB16<2> spi2_miso = port:PB17<2> [spi3] spi3_used = 0 spi3_cs_number = 2 spi3_cs_bitmap = 3 spi3_cs0 = port:PA5<3><1> spi3_cs1 = port:PA9<3><1> spi3_sclk = port:PA6<3> spi3_mosi = port:PA7<3> spi3_miso = port:PA8<3> ;---------------------------------------------------------------------------------- ;SPI device configuration ;compatible --- device name ;spi-max-frequency --- work frequency ;reg --- chip select ;optional properties: spi-cpha, spi-cpol, spi-cs-high ;---------------------------------------------------------------------------------- ;[spi0/spi_board0] ;compatible = ;spi-max-frequency = ;reg = ;spi-cpha ;spi-cpol ;spi-cs-high 修改为： ;---------------------------------------------------------------------------------- ;SPI controller configuration ;---------------------------------------------------------------------------------- ;spi0有接SPI器件（和PC引脚和NAND冲突），但是空贴！ [spi0] spi0_used = 0 spi0_cs_number = 2 spi0_cs_bitmap = 3 spi0_cs0 = port:PC23<3><1> spi0_cs1 = port:PI14<2><1> spi0_sclk = port:PC2<3> spi0_mosi = port:PC0<3> spi0_miso = port:PC1<3> ;和gmac0复用冲突了！ [spi1] spi1_used = 0 spi1_cs_number = 2 spi1_cs_bitmap = 3 spi1_cs0 = port:PA0<3><1> spi1_cs1 = port:PA4<3><1> spi1_sclk = port:PA1<3> spi1_mosi = port:PA2<3> spi1_miso = port:PA3<3> ;大排针J9引出来了！ [spi2] spi2_used = 1 spi2_cs_number = 2 spi2_cs_bitmap = 3 spi2_cs0 = port:PB14<2><1> spi2_cs1 = port:PB13<2><1> spi2_sclk = port:PB15<2> spi2_mosi = port:PB16<2> spi2_miso = port:PB17<2> ;和gmac0复用冲突了！ [spi3] spi3_used = 0 spi3_cs_number = 2 spi3_cs_bitmap = 3 spi3_cs0 = port:PA5<3><1> spi3_cs1 = port:PA9<3><1> spi3_sclk = port:PA6<3> spi3_mosi = port:PA7<3> spi3_miso = port:PA8<3> ;---------------------------------------------------------------------------------- ;SPI device configuration ;compatible --- device name ;spi-max-frequency --- work frequency ;reg --- chip select ;optional properties: spi-cpha, spi-cpol, spi-cs-high ;---------------------------------------------------------------------------------- ;[spi0/spi_board0] ;compatible = ;spi-max-frequency = ;reg = ;spi-cpha ;spi-cpol ;spi-cs-high [spi2/spi_board2] compatible = "spidev" spi-max-frequency = 50000000 reg = 0 ;spi-cpha = 0 ;spi-cpol = 0 ;spi-cs-high = 0 5、刷机之后： root@TinaLinux:/# root@TinaLinux:/# find . -name spi* ./bin/spidev20_test ./dev/spidev2.0 ./proc/irq/44/spi2 ./rom/bin/spidev20_test ./rom/usr/lib/opkg/info/spidev20_test.control ./rom/usr/lib/opkg/info/spidev20_test.list ./sys/bus/spi ./sys/bus/spi/devices/spi2.0 ./sys/bus/spi/drivers/spidev ./sys/bus/spi/drivers/spidev/spi2.0 ./sys/bus/platform/devices/spi2 ./sys/bus/platform/drivers/spi ./sys/bus/platform/drivers/spi/spi2 ./sys/devices/soc/spi2 ./sys/devices/soc/spi2/spi_master ./sys/devices/soc/spi2/spi_master/spi2 ./sys/devices/soc/spi2/spi_master/spi2/spi2.0 ./sys/devices/soc/spi2/spi_master/spi2/spi2.0/spidev ./sys/devices/soc/spi2/spi_master/spi2/spi2.0/spidev/spidev2.0 ./sys/class/spi_master ./sys/class/spi_master/spi2 ./sys/class/spidev ./sys/class/spidev/spidev2.0 ./sys/kernel/debug/clk/hosc/pll_periph0/spi2 ./sys/kernel/debug/clk/hosc/spi0 ./sys/kernel/debug/clk/hosc/spi1 ./sys/kernel/debug/clk/hosc/spi3 ./sys/module/spidev ./usr/lib/opkg/info/spidev20_test.control ./usr/lib/opkg/info/spidev20_test.list root@TinaLinux:/# root@TinaLinux:/#

============================================ 作者：yuanlulu http://blog.csdn.net/yuanlulu 版权没有，但是转载请保留此段声明 ============================================ spi_master/spi_device和spi_driver的关系。

SPI裸机，SPI OLED驱动，SPI flash 驱动和SPI MASTER驱动，本课程全面讲解了SPI的方方面面。

这两天被spi搞得很混乱网上全是在说spi_board_info 的方式，很不喜欢这种方式。所以一直在搞动态注册 struct spi_driver ds3231_driver= { .driver = { .name=this_driver_name, .bus= &spi_bus_type, .owner=THIS_MODULE, }, .probe =ds3231

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