[PATCH 1/6] i2c-imx: change log level for No ACK

[PATCH 1/6] i2c-imx: change log level for No ACK

[Eric Bénard]

Signed-off-by: Eric Bénard <eric@eukrea.com>
---
 drivers/i2c/i2c-imx.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/i2c/i2c-imx.c b/drivers/i2c/i2c-imx.c
index 03e3785..cc64d94 100644
--- a/drivers/i2c/i2c-imx.c
+++ b/drivers/i2c/i2c-imx.c
@@ -214,7 +214,7 @@ static int i2c_imx_acked(struct i2c_adapter *adapter)
 			break;
 
 		if (is_timeout(start, MSECOND)) {
-			dev_err(adapter->dev, "<%s> No ACK\n", __func__);
+			dev_dbg(adapter->dev, "<%s> No ACK\n", __func__);
 			return -EIO;
 		}
 	}
-- 
1.6.3.3


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[PATCH v2 2/6] i2c: implement i2c_get_adapter()

[Eric Bénard]

From: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Eric Bénard <eric@eukrea.com>
---
v2 : add i2c_get_adapter to include/i2c/i2c.h

 drivers/i2c/i2c.c |   24 +++++++++++++++++++++++-
 include/i2c/i2c.h |    2 ++
 2 files changed, 25 insertions(+), 1 deletions(-)

diff --git a/drivers/i2c/i2c.c b/drivers/i2c/i2c.c
index 32fd026..1fa114a 100644
--- a/drivers/i2c/i2c.c
+++ b/drivers/i2c/i2c.c
@@ -39,7 +39,7 @@ struct boardinfo {
 };
 
 static LIST_HEAD(board_list);
-
+static LIST_HEAD(adapter_list);
 
 /**
  * i2c_transfer - execute a single or combined I2C message
@@ -327,6 +327,23 @@ static void scan_boardinfo(struct i2c_adapter *adapter)
 }
 
 /**
+ *
+ * i2c_get_adapter - get an i2c adapter from its busnum
+ *
+ * @param	busnum	the desired bus number
+ *
+ */
+struct i2c_adapter *i2c_get_adapter(int busnum)
+{
+	struct i2c_adapter *adap;
+
+	list_for_each_entry(adap, &adapter_list, list)
+		if (adap->nr == busnum)
+			return adap;
+	return NULL;
+}
+
+/**
  * i2c_register_master - register I2C master controller
  *
  * @param	master	initialized master, originally from i2c_alloc_master()
@@ -345,6 +362,11 @@ static void scan_boardinfo(struct i2c_adapter *adapter)
  */
 int i2c_add_numbered_adapter(struct i2c_adapter *adapter)
 {
+	if (i2c_get_adapter(adapter->nr))
+		return -EBUSY;
+
+	list_add_tail(&adapter_list, &adapter->list);
+
 	/* populate children from any i2c device tables */
 	scan_boardinfo(adapter);
 
diff --git a/include/i2c/i2c.h b/include/i2c/i2c.h
index 0760fdc..c031bbb 100644
--- a/include/i2c/i2c.h
+++ b/include/i2c/i2c.h
@@ -66,6 +66,7 @@ struct i2c_adapter {
 	struct device_d		*dev;	/* ptr to device */
 	int			nr;	/* bus number */
 	int (*master_xfer)(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);
+	struct list_head	list;
 };
 
 
@@ -120,6 +121,7 @@ static inline int i2c_register_board_info(int busnum,
 }
 #endif
 extern int i2c_add_numbered_adapter(struct i2c_adapter *adapter);
+struct i2c_adapter *i2c_get_adapter(int busnum);
 
 extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);
 extern int i2c_master_send(struct i2c_client *client, const char *buf, int count);
-- 
1.6.3.3


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[PATCH v4 3/6] commands: add i2c commands

[Eric Bénard]

theses commands allow low level access to i2c bus and can be useful
to setup an i2c device without having to add code, compile and flash
barebox.

Signed-off-by: Eric Bénard <eric@eukrea.com>
---
v4 :
	updated as per Sascha and Marc's comments
	use bus 0 as a default for i2c_read & write
	replace malloc with xmalloc
	fix simple_strtol configuration for parameters
v3 : 
	enable brain and fix v2
	tested on iMX27
v2 :
	updated as per Sascha's comments

 commands/Kconfig  |    8 ++
 commands/Makefile |    1 +
 commands/i2c.c    |  212 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 221 insertions(+), 0 deletions(-)
 create mode 100644 commands/i2c.c

diff --git a/commands/Kconfig b/commands/Kconfig
index 0c09f91..0ea32d9 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -314,4 +314,12 @@ config CMD_UNLZO
 	  Say yes here to get the unlzo command. lzo is a fast compression
 	  algorithm by Markus Franz Xaver Johannes Oberhumer.
 
+config CMD_I2C
+	bool
+	depends on I2C
+	prompt "i2c commands"
+	help
+	  include i2c_probe, i2c_read and i2c_write commands to communicate
+	  on i2c bus.
+
 endmenu
diff --git a/commands/Makefile b/commands/Makefile
index 74b0994..3eef5de 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -48,3 +48,4 @@ obj-$(CONFIG_CMD_BMP)		+= bmp.o
 obj-$(CONFIG_USB_GADGET_DFU)	+= dfu.o
 obj-$(CONFIG_CMD_GPIO)		+= gpio.o
 obj-$(CONFIG_CMD_UNLZO)		+= unlzo.o
+obj-$(CONFIG_CMD_I2C)		+= i2c.o
diff --git a/commands/i2c.c b/commands/i2c.c
new file mode 100644
index 0000000..1e617f6
--- /dev/null
+++ b/commands/i2c.c
@@ -0,0 +1,212 @@
+/*
+ * i2c.c - i2c commands
+ *
+ * Copyright (c) 2010 Eric Bénard <eric@eukrea.Com>, Eukréa Electromatique
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <errno.h>
+#include <malloc.h>
+#include <getopt.h>
+#include <i2c/i2c.h>
+
+static int do_i2c_probe(struct command *cmdtp, int argc, char *argv[])
+{
+	struct i2c_adapter *adapter;
+	struct i2c_client client;
+	int startaddr = -1, stopaddr = -1, addr, ret;
+	u8 reg;
+
+	if (argc < 4)
+		return COMMAND_ERROR_USAGE;
+
+	adapter = i2c_get_adapter(simple_strtoul(argv[1], NULL, 0));
+	if (!adapter)
+		return -ENODEV;
+	client.adapter = adapter;
+
+	startaddr = simple_strtol(argv[2], NULL, 0);
+	stopaddr = simple_strtol(argv[3], NULL, 0);
+	if ((startaddr == -1) || (stopaddr == -1) || (startaddr > stopaddr))
+		return COMMAND_ERROR_USAGE;
+
+	if (stopaddr > 0x7F)
+		stopaddr = 0x7F;
+
+	printf("probing i2c range 0X%02x - 0x%02x :\n", startaddr, stopaddr);
+	for (addr = startaddr; addr <= stopaddr; addr++) {
+		client.addr = addr;
+		ret = i2c_write_reg(&client, 0x00, &reg, 0);
+		if (ret == 0)
+			printf("0x%02x ", addr);
+	}
+	printf("\n");
+	return 0;
+}
+
+static const __maybe_unused char cmd_i2c_probe_help[] =
+"Usage: i2c_probe bus 0xstartaddr 0xstopaddr\n"
+"probe a range of i2c addresses.\n";
+
+BAREBOX_CMD_START(i2c_probe)
+	.cmd		= do_i2c_probe,
+	.usage		= "probe for an i2c device",
+	BAREBOX_CMD_HELP(cmd_i2c_probe_help)
+BAREBOX_CMD_END
+
+static int do_i2c_write(struct command *cmdtp, int argc, char *argv[])
+{
+	struct i2c_adapter *adapter = NULL;
+	struct i2c_client client;
+	int addr = -1, reg = -1, count = -1, verbose = 0, ret = 0, opt, i;
+	u8 *buf;
+	u8 tmp;
+
+	while ((opt = getopt(argc, argv, "a:b:r:v")) > 0) {
+		switch (opt) {
+		case 'a':
+			addr = simple_strtol(optarg, NULL, 0);
+			break;
+		case 'r':
+			reg = simple_strtol(optarg, NULL, 0);
+			break;
+		case 'b':
+			adapter = i2c_get_adapter(simple_strtoul(optarg, NULL, 0));
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		}
+	}
+
+	count = argc - optind;
+
+	if ((addr < 0) || (reg < 0) || (count == 0) || (addr > 0x7F))
+		return COMMAND_ERROR_USAGE;
+
+	if (!adapter)
+		adapter = i2c_get_adapter(0);
+	if (!adapter)
+		return -ENODEV;
+
+	client.adapter = adapter;
+	client.addr = addr;
+
+	buf = xmalloc(count);
+	for (i = 0; i < count; i++)
+		*(buf + i) = (char) simple_strtol(argv[optind+i], NULL, 16);
+
+	ret = i2c_write_reg(&client, reg, buf, count);
+	if (ret != count)
+		goto out;
+
+	if (verbose) {
+		printf("wrote %i bytes starting at reg 0x%02x to i2cdev 0x%02x on bus %i\n",
+			count, reg, addr, adapter->nr);
+		for (i = 0; i < count; i++)
+			printf("0x%02x ", *(buf + i));
+		printf("\n");
+	}
+
+out:
+	free(buf);
+	return 0;
+}
+
+static const __maybe_unused char cmd_i2c_write_help[] =
+"Usage: i2c_write [OPTION] ... hexdatas\n"
+"write to i2c device.\n"
+"  -a 0x<addr>   i2c device address\n"
+"  -b <bus_num>  i2c bus number (default = 0)\n"
+"  -r 0x<reg>    start register\n";
+
+BAREBOX_CMD_START(i2c_write)
+	.cmd		= do_i2c_write,
+	.usage		= "write to an i2c device",
+	BAREBOX_CMD_HELP(cmd_i2c_write_help)
+BAREBOX_CMD_END
+
+static int do_i2c_read(struct command *cmdtp, int argc, char *argv[])
+{
+	struct i2c_adapter *adapter = NULL;
+	struct i2c_client client;
+	u8 *buf;
+	int count = -1, addr = -1, reg = -1, verbose = 0, ret = 0, opt;
+
+	while ((opt = getopt(argc, argv, "a:b:c:r:v")) > 0) {
+		switch (opt) {
+		case 'a':
+			addr = simple_strtol(optarg, NULL, 0);
+			break;
+		case 'c':
+			count = simple_strtoul(optarg, NULL, 0);
+			break;
+		case 'b':
+			adapter = i2c_get_adapter(simple_strtoul(optarg, NULL, 0));
+			break;
+		case 'r':
+			reg = simple_strtol(optarg, NULL, 0);
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		}
+	}
+
+	if ((addr < 0) || (reg < 0) || (count == 0) || (addr > 0x7F))
+		return COMMAND_ERROR_USAGE;
+
+	if (!adapter)
+		adapter = i2c_get_adapter(0);
+	if (!adapter)
+		return -ENODEV;
+
+	client.adapter = adapter;
+	client.addr = addr;
+
+	buf = xmalloc(count);
+	ret = i2c_read_reg(&client, reg, buf, count);
+	if (ret == count) {
+		int i;
+		if (verbose)
+			printf("read %i bytes starting at reg 0x%02x from i2cdev 0x%02x on bus %i\n",
+				count, reg, addr, adapter->nr);
+		for (i = 0; i < count; i++)
+			printf("0x%02x ", *(buf + i));
+		printf("\n");
+		ret = 0;
+	}
+
+	free(buf);
+	return ret;
+}
+
+static const __maybe_unused char cmd_i2c_read_help[] =
+"Usage: i2c_read [OPTION]\n"
+"read i2c device.\n"
+"  -a 0x<addr>   i2c device address\n"
+"  -b <bus_num>  i2c bus number (default = 0)\n"
+"  -r 0x<reg>    start register\n"
+"  -c <count>    byte count\n";
+
+BAREBOX_CMD_START(i2c_read)
+	.cmd		= do_i2c_read,
+	.usage		= "read from an i2c device",
+	BAREBOX_CMD_HELP(cmd_i2c_read_help)
+BAREBOX_CMD_END
-- 
1.6.3.3


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[PATCH 4/6] eukrea_cpuimx27: add fb support

[Eric Bénard]

Signed-off-by: Eric Bénard <eric@eukrea.com>
---
 board/eukrea_cpuimx27/eukrea_cpuimx27.c |   67 ++++++++++++++++++++++++++++++-
 1 files changed, 66 insertions(+), 1 deletions(-)

diff --git a/board/eukrea_cpuimx27/eukrea_cpuimx27.c b/board/eukrea_cpuimx27/eukrea_cpuimx27.c
index ef57a96..e40c260 100644
--- a/board/eukrea_cpuimx27/eukrea_cpuimx27.c
+++ b/board/eukrea_cpuimx27/eukrea_cpuimx27.c
@@ -40,6 +40,7 @@
 #include <asm/io.h>
 #include <mach/imx-nand.h>
 #include <mach/imx-pll.h>
+#include <mach/imxfb.h>
 #include <ns16550.h>
 #include <asm/mmu.h>
 #include <i2c/i2c.h>
@@ -176,6 +177,39 @@ static void eukrea_cpuimx27_mmu_init(void)
 }
 #endif
 
+#ifdef CONFIG_DRIVER_VIDEO_IMX
+static struct imx_fb_videomode imxfb_mode = {
+	.mode = {
+		.name		= "CMO-QVGA",
+		.refresh	= 60,
+		.xres		= 320,
+		.yres		= 240,
+		.pixclock	= 156000,
+		.hsync_len	= 30,
+		.left_margin	= 38,
+		.right_margin	= 20,
+		.vsync_len	= 3,
+		.upper_margin	= 15,
+		.lower_margin	= 4,
+	},
+	.pcr		= 0xFAD08B80,
+	.bpp		= 16,};
+
+static struct imx_fb_platform_data eukrea_cpuimx27_fb_data = {
+	.mode	= &imxfb_mode,
+	.pwmr	= 0x00A903FF,
+	.lscr1	= 0x00120300,
+	.dmacr	= 0x00020010,
+};
+
+static struct device_d imxfb_dev = {
+	.name		= "imxfb",
+	.map_base	= 0x10021000,
+	.size		= 0x1000,
+	.platform_data	= &eukrea_cpuimx27_fb_data,
+};
+#endif
+
 static int eukrea_cpuimx27_devices_init(void)
 {
 	char *envdev = "no";
@@ -208,6 +242,31 @@ static int eukrea_cpuimx27_devices_init(void)
 		PE14_PF_UART1_CTS,
 		PE15_PF_UART1_RTS,
 #endif
+#ifdef CONFIG_DRIVER_VIDEO_IMX
+		PA5_PF_LSCLK,
+		PA6_PF_LD0,
+		PA7_PF_LD1,
+		PA8_PF_LD2,
+		PA9_PF_LD3,
+		PA10_PF_LD4,
+		PA11_PF_LD5,
+		PA12_PF_LD6,
+		PA13_PF_LD7,
+		PA14_PF_LD8,
+		PA15_PF_LD9,
+		PA16_PF_LD10,
+		PA17_PF_LD11,
+		PA18_PF_LD12,
+		PA19_PF_LD13,
+		PA20_PF_LD14,
+		PA21_PF_LD15,
+		PA22_PF_LD16,
+		PA23_PF_LD17,
+		PA28_PF_HSYNC,
+		PA29_PF_VSYNC,
+		PA31_PF_OE_ACD,
+		GPIO_PORTE | 5 | GPIO_GPIO | GPIO_OUT,
+#endif
 	};
 
 	eukrea_cpuimx27_mmu_init();
@@ -217,7 +276,7 @@ static int eukrea_cpuimx27_devices_init(void)
 	CS0L = 0xA0330D01;
 	CS0A = 0x002208C0;
 
-	/* initizalize gpios */
+	/* initialize gpios */
 	for (i = 0; i < ARRAY_SIZE(mode); i++)
 		imx_gpio_mode(mode[i]);
 
@@ -239,6 +298,12 @@ static int eukrea_cpuimx27_devices_init(void)
 
 	printf("Using environment in %s Flash\n", envdev);
 
+#ifdef CONFIG_DRIVER_VIDEO_IMX
+	register_device(&imxfb_dev);
+	gpio_direction_output(GPIO_PORTE | 5, 0);
+	gpio_set_value(GPIO_PORTE | 5, 1);
+#endif
+
 	armlinux_add_dram(&sdram_dev);
 	armlinux_set_bootparams((void *)0xa0000100);
 	armlinux_set_architecture(MACH_TYPE_CPUIMX27);
-- 
1.6.3.3


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[PATCH 5/6] eukrea_cpuimx27: update env

[Eric Bénard]

Signed-off-by: Eric Bénard <eric@eukrea.com>
---
 board/eukrea_cpuimx27/env/bin/boot |   10 +++++++---
 board/eukrea_cpuimx27/env/config   |   14 +++++++-------
 2 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/board/eukrea_cpuimx27/env/bin/boot b/board/eukrea_cpuimx27/env/bin/boot
index 7bbff2d..7272e56 100644
--- a/board/eukrea_cpuimx27/env/bin/boot
+++ b/board/eukrea_cpuimx27/env/bin/boot
@@ -17,10 +17,14 @@ if [ x$1 = xnor ]; then
 	kernel=nor
 fi
 
-if [ x$ip = xdhcp ]; then
-	bootargs="$bootargs ip=dhcp"
+if [ x$root = xnet ]; then
+	if [ x$ip = xdhcp ]; then
+		bootargs="$bootargs ip=dhcp"
+	else
+		bootargs="$bootargs ip=$eth0.ipaddr:$eth0.serverip:$eth0.gateway:$eth0.netmask:::"
+	fi
 else
-	bootargs="$bootargs ip=$eth0.ipaddr:$eth0.serverip:$eth0.gateway:$eth0.netmask:::"
+	bootargs="$bootargs ip=off"
 fi
 
 if [ x$root = xnand ]; then
diff --git a/board/eukrea_cpuimx27/env/config b/board/eukrea_cpuimx27/env/config
index 183787e..505ada3 100644
--- a/board/eukrea_cpuimx27/env/config
+++ b/board/eukrea_cpuimx27/env/config
@@ -4,16 +4,16 @@
 kernel=nor
 root=nor
 
-uimage=cpuimx27/uImage
-jffs2=cpuimx27/rootfs.jffs2
+uimage=mx27/uImage
+jffs2=mx27/rootfs.jffs2
 
-autoboot_timeout=3
+autoboot_timeout=1
 
-# TFP410-SVGA TFP410-VGA CMO-QVGA Optrex-WVGA Sharp-QVGA-EK
+# DVI-SVGA DVI-VGA CMO-QVGA
 video="CMO-QVGA"
-bootargs="console=ttymxc0,115200 fec_mac=$eth0.ethaddr rtc-pcf8563.probe=0,0x51 video=mxcfb:$video"
+bootargs="console=ttymxc0,115200 fec_mac=$eth0.ethaddr video=mxcfb:$video"
 
-nor_parts="256k(barebox)ro,128k(bareboxenv),1792k(kernel),-(root)"
+nor_parts="256k(barebox)ro,128k(bareboxenv),2176k(kernel),-(root)"
 rootpart_nor="/dev/mtdblock3"
 
 nand_parts="-(nand)"
@@ -28,4 +28,4 @@ ip=dhcp
 #eth0.ipaddr=a.b.c.d
 #eth0.netmask=a.b.c.d
 #eth0.gateway=a.b.c.d
-eth0.serverip=192.168.1.15
+#eth0.serverip=a.b.c.d
-- 
1.6.3.3


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[PATCH 6/6] eukrea_cpuimx27: update defconfig

[Eric Bénard]

Signed-off-by: Eric Bénard <eric@eukrea.com>
---
 arch/arm/configs/eukrea_cpuimx27_defconfig |   79 ++++++++++++++++-----------
 1 files changed, 47 insertions(+), 32 deletions(-)

diff --git a/arch/arm/configs/eukrea_cpuimx27_defconfig b/arch/arm/configs/eukrea_cpuimx27_defconfig
index b1624de..3b92c37 100644
--- a/arch/arm/configs/eukrea_cpuimx27_defconfig
+++ b/arch/arm/configs/eukrea_cpuimx27_defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
-# barebox version: 2.0.0-rc10
-# Fri Dec 18 11:47:22 2009
+# barebox version: 2010.05.0
+# Tue May 25 09:57:55 2010
 #
 # CONFIG_BOARD_LINKER_SCRIPT is not set
 CONFIG_GENERIC_LINKER_SCRIPT=y
@@ -12,6 +12,7 @@ CONFIG_ARM=y
 #
 # CONFIG_ARCH_AT91 is not set
 # CONFIG_ARCH_AT91RM9200 is not set
+# CONFIG_ARCH_EP93XX is not set
 CONFIG_ARCH_IMX=y
 # CONFIG_ARCH_NETX is not set
 # CONFIG_ARCH_OMAP is not set
@@ -46,7 +47,7 @@ CONFIG_MACH_EUKREA_CPUIMX27=y
 # CONFIG_MACH_PCM038 is not set
 
 #
-# Board specific settings
+# Board specific settings       
 #
 CONFIG_EUKREA_CPUIMX27_SDRAM_128MB=y
 # CONFIG_EUKREA_CPUIMX27_SDRAM_256MB is not set
@@ -58,18 +59,15 @@ CONFIG_EUKREA_CPUIMX27_QUART1=y
 # CONFIG_EUKREA_CPUIMX27_QUART4 is not set
 
 #
-# i.MX specific settings
+# i.MX specific settings        
 #
 CONFIG_IMX_CLKO=y
 # CONFIG_AEABI is not set
 
 #
-# Arm specific settings
+# Arm specific settings         
 #
 CONFIG_CMD_ARM_CPUINFO=y
-CONFIG_CMDLINE_TAG=y
-CONFIG_SETUP_MEMORY_TAGS=y
-# CONFIG_INITRD_TAG is not set
 CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS=y
 CONFIG_GREGORIAN_CALENDER=y
 CONFIG_HAS_KALLSYMS=y
@@ -79,12 +77,12 @@ CONFIG_ENV_HANDLING=y
 CONFIG_GENERIC_GPIO=y
 
 #
-# General Settings
+# General Settings              
 #
 CONFIG_LOCALVERSION_AUTO=y
 
 #
-# memory layout
+# memory layout                 
 #
 CONFIG_HAVE_MMU=y
 CONFIG_MMU=y
@@ -108,6 +106,7 @@ CONFIG_SHELL_HUSH=y
 # CONFIG_SHELL_SIMPLE is not set
 CONFIG_GLOB=y
 CONFIG_PROMPT_HUSH_PS2="> "
+CONFIG_HUSH_FANCY_PROMPT=y
 CONFIG_CMDLINE_EDITING=y
 CONFIG_AUTO_COMPLETE=y
 CONFIG_DYNAMIC_CRC_TABLE=y
@@ -122,7 +121,7 @@ CONFIG_DEFAULT_ENVIRONMENT=y
 CONFIG_DEFAULT_ENVIRONMENT_PATH="board/eukrea_cpuimx27/env"
 
 #
-# Debugging
+# Debugging                     
 #
 # CONFIG_DEBUG_INFO is not set
 # CONFIG_ENABLE_FLASH_NOISE is not set
@@ -130,11 +129,11 @@ CONFIG_DEFAULT_ENVIRONMENT_PATH="board/eukrea_cpuimx27/env"
 # CONFIG_ENABLE_DEVICE_NOISE is not set
 
 #
-# Commands
+# Commands                      
 #
 
 #
-# scripting
+# scripting                     
 #
 CONFIG_CMD_EDIT=y
 CONFIG_CMD_SLEEP=y
@@ -147,7 +146,7 @@ CONFIG_CMD_TRUE=y
 CONFIG_CMD_FALSE=y
 
 #
-# file commands
+# file commands                 
 #
 CONFIG_CMD_LS=y
 CONFIG_CMD_RM=y
@@ -161,13 +160,14 @@ CONFIG_CMD_MOUNT=y
 CONFIG_CMD_UMOUNT=y
 
 #
-# console
+# console                       
 #
 CONFIG_CMD_CLEAR=y
 CONFIG_CMD_ECHO=y
+CONFIG_CMD_ECHO_E=y
 
 #
-# memory
+# memory                        
 #
 # CONFIG_CMD_LOADB is not set
 CONFIG_CMD_MEMINFO=y
@@ -176,19 +176,20 @@ CONFIG_CMD_MTEST=y
 # CONFIG_CMD_MTEST_ALTERNATIVE is not set
 
 #
-# flash
+# flash                         
 #
 CONFIG_CMD_FLASH=y
 
 #
-# booting
+# booting                       
 #
 CONFIG_CMD_BOOTM=y
 # CONFIG_CMD_BOOTM_ZLIB is not set
 # CONFIG_CMD_BOOTM_BZLIB is not set
-# CONFIG_CMD_BOOTM_SHOW_TYPE is not set
+CONFIG_CMD_BOOTM_SHOW_TYPE=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_BOOTU=y
+# CONFIG_CMD_LINUX16 is not set
 CONFIG_CMD_RESET=y
 CONFIG_CMD_GO=y
 CONFIG_CMD_TIMEOUT=y
@@ -197,7 +198,10 @@ CONFIG_CMD_TEST=y
 CONFIG_CMD_VERSION=y
 CONFIG_CMD_HELP=y
 CONFIG_CMD_DEVINFO=y
+CONFIG_CMD_BMP=y
 CONFIG_CMD_GPIO=y
+CONFIG_CMD_UNLZO=y
+CONFIG_CMD_I2C=y
 CONFIG_NET=y
 CONFIG_NET_DHCP=y
 # CONFIG_NET_RARP is not set
@@ -206,11 +210,11 @@ CONFIG_NET_PING=y
 CONFIG_NET_TFTP=y
 
 #
-# Drivers
+# Drivers                       
 #
 
 #
-# serial drivers
+# serial drivers                
 #
 # CONFIG_DRIVER_SERIAL_ARM_DCC is not set
 CONFIG_DRIVER_SERIAL_IMX=y
@@ -218,27 +222,33 @@ CONFIG_DRIVER_SERIAL_NS16550=y
 CONFIG_MIIPHY=y
 
 #
-# Network drivers
+# Network drivers               
 #
 # CONFIG_DRIVER_NET_SMC911X is not set
 # CONFIG_DRIVER_NET_SMC91111 is not set
 CONFIG_DRIVER_NET_FEC_IMX=y
 
 #
-# SPI drivers
+# SPI drivers                   
 #
-CONFIG_SPI=y
-CONFIG_DRIVER_SPI_IMX=y
-CONFIG_DRIVER_SPI_MC13783=y
-# CONFIG_I2C is not set
+# CONFIG_SPI is not set
+CONFIG_I2C=y
+CONFIG_DRIVER_I2C_IMX=y
+# CONFIG_DRIVER_I2C_MC13892 is not set
+# CONFIG_DRIVER_I2C_MC9SDZ60 is not set
+CONFIG_DRIVER_I2C_LP3972=y
 
 #
-# flash drivers
+# flash drivers                 
 #
 CONFIG_HAS_CFI=y
 CONFIG_DRIVER_CFI=y
-# CONFIG_DRIVER_CFI_NEW is not set
-CONFIG_DRIVER_CFI_OLD=y
+CONFIG_DRIVER_CFI_INTEL=y
+# CONFIG_DRIVER_CFI_AMD is not set
+# CONFIG_DRIVER_CFI_BANK_WIDTH_1 is not set
+CONFIG_DRIVER_CFI_BANK_WIDTH_2=y
+# CONFIG_DRIVER_CFI_BANK_WIDTH_4 is not set
+# CONFIG_DRIVER_CFI_BANK_WIDTH_8 is not set
 CONFIG_CFI_BUFFER_WRITE=y
 CONFIG_NAND=y
 CONFIG_NAND_IMX=y
@@ -246,15 +256,20 @@ CONFIG_NAND_IMX=y
 # CONFIG_MTD_NAND_VERIFY_WRITE is not set
 # CONFIG_MTD_NAND_ECC_SMC is not set
 CONFIG_MTD_NAND_IDS=y
+# CONFIG_ATA is not set
 # CONFIG_USB is not set
 # CONFIG_USB_GADGET is not set
-# CONFIG_VIDEO is not set
+CONFIG_VIDEO=y
+CONFIG_DRIVER_VIDEO_IMX=y
+# CONFIG_IMXFB_DRIVER_VIDEO_IMX_OVERLAY is not set
 
 #
-# Filesystem support
+# Filesystem support            
 #
 # CONFIG_FS_CRAMFS is not set
 CONFIG_FS_RAMFS=y
 CONFIG_FS_DEVFS=y
 CONFIG_CRC32=y
 # CONFIG_GENERIC_FIND_NEXT_BIT is not set
+CONFIG_PROCESS_ESCAPE_SEQUENCE=y
+CONFIG_LZO_DECOMPRESS=y
-- 
1.6.3.3


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Re: [PATCH v4 3/6] commands: add i2c commands

[Marc Kleine-Budde]

[-- Attachment #1.1: Type: text/plain, Size: 8505 bytes --]

Eric Bénard wrote:
> theses commands allow low level access to i2c bus and can be useful
> to setup an i2c device without having to add code, compile and flash
> barebox.
> 
> Signed-off-by: Eric Bénard <eric@eukrea.com>
> ---
> v4 :
> 	updated as per Sascha and Marc's comments
> 	use bus 0 as a default for i2c_read & write
> 	replace malloc with xmalloc
> 	fix simple_strtol configuration for parameters
> v3 : 
> 	enable brain and fix v2
> 	tested on iMX27
> v2 :
> 	updated as per Sascha's comments
> 
>  commands/Kconfig  |    8 ++
>  commands/Makefile |    1 +
>  commands/i2c.c    |  212 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 221 insertions(+), 0 deletions(-)
>  create mode 100644 commands/i2c.c
> 
> diff --git a/commands/Kconfig b/commands/Kconfig
> index 0c09f91..0ea32d9 100644
> --- a/commands/Kconfig
> +++ b/commands/Kconfig
> @@ -314,4 +314,12 @@ config CMD_UNLZO
>  	  Say yes here to get the unlzo command. lzo is a fast compression
>  	  algorithm by Markus Franz Xaver Johannes Oberhumer.
>  
> +config CMD_I2C
> +	bool
> +	depends on I2C
> +	prompt "i2c commands"
> +	help
> +	  include i2c_probe, i2c_read and i2c_write commands to communicate
> +	  on i2c bus.
> +
>  endmenu
> diff --git a/commands/Makefile b/commands/Makefile
> index 74b0994..3eef5de 100644
> --- a/commands/Makefile
> +++ b/commands/Makefile
> @@ -48,3 +48,4 @@ obj-$(CONFIG_CMD_BMP)		+= bmp.o
>  obj-$(CONFIG_USB_GADGET_DFU)	+= dfu.o
>  obj-$(CONFIG_CMD_GPIO)		+= gpio.o
>  obj-$(CONFIG_CMD_UNLZO)		+= unlzo.o
> +obj-$(CONFIG_CMD_I2C)		+= i2c.o
> diff --git a/commands/i2c.c b/commands/i2c.c
> new file mode 100644
> index 0000000..1e617f6
> --- /dev/null
> +++ b/commands/i2c.c
> @@ -0,0 +1,212 @@
> +/*
> + * i2c.c - i2c commands
> + *
> + * Copyright (c) 2010 Eric Bénard <eric@eukrea.Com>, Eukréa Electromatique
> + *
> + * 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, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
> + * MA 02111-1307 USA
> + */
> +
> +#include <common.h>
> +#include <command.h>
> +#include <errno.h>
> +#include <malloc.h>
> +#include <getopt.h>
> +#include <i2c/i2c.h>
> +
> +static int do_i2c_probe(struct command *cmdtp, int argc, char *argv[])
> +{
> +	struct i2c_adapter *adapter;
> +	struct i2c_client client;
> +	int startaddr = -1, stopaddr = -1, addr, ret;
> +	u8 reg;
> +
> +	if (argc < 4)
> +		return COMMAND_ERROR_USAGE;
> +
> +	adapter = i2c_get_adapter(simple_strtoul(argv[1], NULL, 0));
> +	if (!adapter)
> +		return -ENODEV;
> +	client.adapter = adapter;
> +
> +	startaddr = simple_strtol(argv[2], NULL, 0);
> +	stopaddr = simple_strtol(argv[3], NULL, 0);
> +	if ((startaddr == -1) || (stopaddr == -1) || (startaddr > stopaddr))
> +		return COMMAND_ERROR_USAGE;
> +
> +	if (stopaddr > 0x7F)
> +		stopaddr = 0x7F;
> +
> +	printf("probing i2c range 0X%02x - 0x%02x :\n", startaddr, stopaddr);
> +	for (addr = startaddr; addr <= stopaddr; addr++) {
> +		client.addr = addr;
> +		ret = i2c_write_reg(&client, 0x00, &reg, 0);
> +		if (ret == 0)
> +			printf("0x%02x ", addr);
> +	}
> +	printf("\n");
> +	return 0;
> +}
> +
> +static const __maybe_unused char cmd_i2c_probe_help[] =
> +"Usage: i2c_probe bus 0xstartaddr 0xstopaddr\n"
> +"probe a range of i2c addresses.\n";
> +
> +BAREBOX_CMD_START(i2c_probe)
> +	.cmd		= do_i2c_probe,
> +	.usage		= "probe for an i2c device",
> +	BAREBOX_CMD_HELP(cmd_i2c_probe_help)
> +BAREBOX_CMD_END
> +
> +static int do_i2c_write(struct command *cmdtp, int argc, char *argv[])
> +{
> +	struct i2c_adapter *adapter = NULL;
> +	struct i2c_client client;
> +	int addr = -1, reg = -1, count = -1, verbose = 0, ret = 0, opt, i;
> +	u8 *buf;
> +	u8 tmp;
> +
> +	while ((opt = getopt(argc, argv, "a:b:r:v")) > 0) {
> +		switch (opt) {
> +		case 'a':
> +			addr = simple_strtol(optarg, NULL, 0);
> +			break;
> +		case 'r':
> +			reg = simple_strtol(optarg, NULL, 0);
> +			break;
> +		case 'b':
> +			adapter = i2c_get_adapter(simple_strtoul(optarg, NULL, 0));

I'd just save the optarg in a variable...

> +			break;
> +		case 'v':
> +			verbose = 1;
> +			break;
> +		}
> +	}
> +
> +	count = argc - optind;
> +
> +	if ((addr < 0) || (reg < 0) || (count == 0) || (addr > 0x7F))
> +		return COMMAND_ERROR_USAGE;
> +
> +	if (!adapter)
> +		adapter = i2c_get_adapter(0);

and use it here. Because if you specify an invalid adapter number,
adapter 0 will be used silently (if it exists).

> +	if (!adapter)
> +		return -ENODEV;
> +
> +	client.adapter = adapter;
> +	client.addr = addr;
> +
> +	buf = xmalloc(count);
> +	for (i = 0; i < count; i++)
> +		*(buf + i) = (char) simple_strtol(argv[optind+i], NULL, 16);
> +
> +	ret = i2c_write_reg(&client, reg, buf, count);
> +	if (ret != count)
> +		goto out;

better set a return value indicating an error here...

> +
> +	if (verbose) {
> +		printf("wrote %i bytes starting at reg 0x%02x to i2cdev 0x%02x on bus %i\n",
> +			count, reg, addr, adapter->nr);
> +		for (i = 0; i < count; i++)
> +			printf("0x%02x ", *(buf + i));
> +		printf("\n");
> +	}
> +
> +out:
> +	free(buf);
> +	return 0;

... and return it here.
> +}
> +
> +static const __maybe_unused char cmd_i2c_write_help[] =
> +"Usage: i2c_write [OPTION] ... hexdatas\n"
> +"write to i2c device.\n"
> +"  -a 0x<addr>   i2c device address\n"
> +"  -b <bus_num>  i2c bus number (default = 0)\n"
> +"  -r 0x<reg>    start register\n";
> +
> +BAREBOX_CMD_START(i2c_write)
> +	.cmd		= do_i2c_write,
> +	.usage		= "write to an i2c device",
> +	BAREBOX_CMD_HELP(cmd_i2c_write_help)
> +BAREBOX_CMD_END
> +
> +static int do_i2c_read(struct command *cmdtp, int argc, char *argv[])
> +{
> +	struct i2c_adapter *adapter = NULL;
> +	struct i2c_client client;
> +	u8 *buf;
> +	int count = -1, addr = -1, reg = -1, verbose = 0, ret = 0, opt;
> +
> +	while ((opt = getopt(argc, argv, "a:b:c:r:v")) > 0) {
> +		switch (opt) {
> +		case 'a':
> +			addr = simple_strtol(optarg, NULL, 0);
> +			break;
> +		case 'c':
> +			count = simple_strtoul(optarg, NULL, 0);
> +			break;
> +		case 'b':
> +			adapter = i2c_get_adapter(simple_strtoul(optarg, NULL, 0));
> +			break;
> +		case 'r':
> +			reg = simple_strtol(optarg, NULL, 0);
> +			break;
> +		case 'v':
> +			verbose = 1;
> +			break;
> +		}
> +	}
> +
> +	if ((addr < 0) || (reg < 0) || (count == 0) || (addr > 0x7F))
> +		return COMMAND_ERROR_USAGE;
> +
> +	if (!adapter)
> +		adapter = i2c_get_adapter(0);
> +	if (!adapter)
> +		return -ENODEV;
> +
> +	client.adapter = adapter;
> +	client.addr = addr;
> +
> +	buf = xmalloc(count);
> +	ret = i2c_read_reg(&client, reg, buf, count);
> +	if (ret == count) {
> +		int i;
> +		if (verbose)
> +			printf("read %i bytes starting at reg 0x%02x from i2cdev 0x%02x on bus %i\n",
> +				count, reg, addr, adapter->nr);
> +		for (i = 0; i < count; i++)
> +			printf("0x%02x ", *(buf + i));
> +		printf("\n");
> +		ret = 0;
> +	}
> +
> +	free(buf);
> +	return ret;
> +}
> +
> +static const __maybe_unused char cmd_i2c_read_help[] =
> +"Usage: i2c_read [OPTION]\n"
> +"read i2c device.\n"
> +"  -a 0x<addr>   i2c device address\n"
> +"  -b <bus_num>  i2c bus number (default = 0)\n"
> +"  -r 0x<reg>    start register\n"
> +"  -c <count>    byte count\n";
> +
> +BAREBOX_CMD_START(i2c_read)
> +	.cmd		= do_i2c_read,
> +	.usage		= "read from an i2c device",
> +	BAREBOX_CMD_HELP(cmd_i2c_read_help)
> +BAREBOX_CMD_END

cheers, Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |


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Re: [PATCH v4 3/6] commands: add i2c commands

[Eric Bénard]

Le 25/05/2010 11:02, Marc Kleine-Budde a écrit :
>> +		case 'b':
>> +			adapter = i2c_get_adapter(simple_strtoul(optarg, NULL, 0));
>
> I'd just save the optarg in a variable...
>
>> +			break;
>> +		case 'v':
>> +			verbose = 1;
>> +			break;
>> +		}
>> +	}
>> +
>> +	count = argc - optind;
>> +
>> +	if ((addr<  0) || (reg<  0) || (count == 0) || (addr>  0x7F))
>> +		return COMMAND_ERROR_USAGE;
>> +
>> +	if (!adapter)
>> +		adapter = i2c_get_adapter(0);
>
> and use it here. Because if you specify an invalid adapter number,
> adapter 0 will be used silently (if it exists).
>
you're right, in fact I should exit in the case 'b' handling if the 
adapter doesn't exist, that will be simpler.

>> +	if (!adapter)
>> +		return -ENODEV;
>> +
>> +	client.adapter = adapter;
>> +	client.addr = addr;
>> +
>> +	buf = xmalloc(count);
>> +	for (i = 0; i<  count; i++)
>> +		*(buf + i) = (char) simple_strtol(argv[optind+i], NULL, 16);
>> +
>> +	ret = i2c_write_reg(&client, reg, buf, count);
>> +	if (ret != count)
>> +		goto out;
>
> better set a return value indicating an error here...
ret should already be set by i2c_write_reg so it there is no error, I 
can simply set ret to 0.
>
>> +
>> +	if (verbose) {
>> +		printf("wrote %i bytes starting at reg 0x%02x to i2cdev 0x%02x on bus %i\n",
>> +			count, reg, addr, adapter->nr);
>> +		for (i = 0; i<  count; i++)
>> +			printf("0x%02x ", *(buf + i));
>> +		printf("\n");
>> +	}
>> +
>> +out:
>> +	free(buf);
>> +	return 0;
>
> ... and return it here.

yes, that should be return ret

Eric

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[PATCH v5] commands: add i2c commands

[Eric Bénard]

theses commands allow low level access to i2c bus and can be useful
to setup an i2c device without having to add code, compile and flash
barebox.

Signed-off-by: Eric Bénard <eric@eukrea.com>
---
v5 :
	updated as per Marc's comments
	better error handling in write
	better default bus handling in read & write
v4 :
	updated as per Sascha and Marc's comments
	use bus 0 as a default for i2c_read & write
	replace malloc with xmalloc
	fix simple_strtol configuration for parameters
v3 : 
	enable brain and fix v2
	tested on iMX27
v2 :
	updated as per Sascha's comments

 commands/Kconfig  |    8 ++
 commands/Makefile |    1 +
 commands/i2c.c    |  211 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 220 insertions(+), 0 deletions(-)
 create mode 100644 commands/i2c.c

diff --git a/commands/Kconfig b/commands/Kconfig
index 0c09f91..0ea32d9 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -314,4 +314,12 @@ config CMD_UNLZO
 	  Say yes here to get the unlzo command. lzo is a fast compression
 	  algorithm by Markus Franz Xaver Johannes Oberhumer.
 
+config CMD_I2C
+	bool
+	depends on I2C
+	prompt "i2c commands"
+	help
+	  include i2c_probe, i2c_read and i2c_write commands to communicate
+	  on i2c bus.
+
 endmenu
diff --git a/commands/Makefile b/commands/Makefile
index 74b0994..3eef5de 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -48,3 +48,4 @@ obj-$(CONFIG_CMD_BMP)		+= bmp.o
 obj-$(CONFIG_USB_GADGET_DFU)	+= dfu.o
 obj-$(CONFIG_CMD_GPIO)		+= gpio.o
 obj-$(CONFIG_CMD_UNLZO)		+= unlzo.o
+obj-$(CONFIG_CMD_I2C)		+= i2c.o
diff --git a/commands/i2c.c b/commands/i2c.c
new file mode 100644
index 0000000..b8f2ee6
--- /dev/null
+++ b/commands/i2c.c
@@ -0,0 +1,211 @@
+/*
+ * i2c.c - i2c commands
+ *
+ * Copyright (c) 2010 Eric Bénard <eric@eukrea.Com>, Eukréa Electromatique
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <errno.h>
+#include <malloc.h>
+#include <getopt.h>
+#include <i2c/i2c.h>
+
+static int do_i2c_probe(struct command *cmdtp, int argc, char *argv[])
+{
+	struct i2c_adapter *adapter;
+	struct i2c_client client;
+	int startaddr = -1, stopaddr = -1, addr, ret;
+	u8 reg;
+
+	if (argc < 4)
+		return COMMAND_ERROR_USAGE;
+
+	adapter = i2c_get_adapter(simple_strtoul(argv[1], NULL, 0));
+	if (!adapter)
+		return -ENODEV;
+	client.adapter = adapter;
+
+	startaddr = simple_strtol(argv[2], NULL, 0);
+	stopaddr = simple_strtol(argv[3], NULL, 0);
+	if ((startaddr == -1) || (stopaddr == -1) || (startaddr > stopaddr))
+		return COMMAND_ERROR_USAGE;
+
+	if (stopaddr > 0x7F)
+		stopaddr = 0x7F;
+
+	printf("probing i2c range 0X%02x - 0x%02x :\n", startaddr, stopaddr);
+	for (addr = startaddr; addr <= stopaddr; addr++) {
+		client.addr = addr;
+		ret = i2c_write_reg(&client, 0x00, &reg, 0);
+		if (ret == 0)
+			printf("0x%02x ", addr);
+	}
+	printf("\n");
+	return 0;
+}
+
+static const __maybe_unused char cmd_i2c_probe_help[] =
+"Usage: i2c_probe bus 0xstartaddr 0xstopaddr\n"
+"probe a range of i2c addresses.\n";
+
+BAREBOX_CMD_START(i2c_probe)
+	.cmd		= do_i2c_probe,
+	.usage		= "probe for an i2c device",
+	BAREBOX_CMD_HELP(cmd_i2c_probe_help)
+BAREBOX_CMD_END
+
+static int do_i2c_write(struct command *cmdtp, int argc, char *argv[])
+{
+	struct i2c_adapter *adapter = NULL;
+	struct i2c_client client;
+	int addr = -1, reg = -1, count = -1, verbose = 0, ret, opt, i, bus = 0;
+	u8 *buf;
+	u8 tmp;
+
+	while ((opt = getopt(argc, argv, "a:b:r:v")) > 0) {
+		switch (opt) {
+		case 'a':
+			addr = simple_strtol(optarg, NULL, 0);
+			break;
+		case 'r':
+			reg = simple_strtol(optarg, NULL, 0);
+			break;
+		case 'b':
+			bus = simple_strtoul(optarg, NULL, 0);
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		}
+	}
+
+	count = argc - optind;
+
+	if ((addr < 0) || (reg < 0) || (count == 0) || (addr > 0x7F))
+		return COMMAND_ERROR_USAGE;
+
+	adapter = i2c_get_adapter(bus);
+	if (!adapter)
+		return -ENODEV;
+
+	client.adapter = adapter;
+	client.addr = addr;
+
+	buf = xmalloc(count);
+	for (i = 0; i < count; i++)
+		*(buf + i) = (char) simple_strtol(argv[optind+i], NULL, 16);
+
+	ret = i2c_write_reg(&client, reg, buf, count);
+	if (ret != count)
+		goto out;
+	ret = 0;
+
+	if (verbose) {
+		printf("wrote %i bytes starting at reg 0x%02x to i2cdev 0x%02x on bus %i\n",
+			count, reg, addr, adapter->nr);
+		for (i = 0; i < count; i++)
+			printf("0x%02x ", *(buf + i));
+		printf("\n");
+	}
+
+out:
+	free(buf);
+	return ret;
+}
+
+static const __maybe_unused char cmd_i2c_write_help[] =
+"Usage: i2c_write [OPTION] ... hexdatas\n"
+"write to i2c device.\n"
+"  -a 0x<addr>   i2c device address\n"
+"  -b <bus_num>  i2c bus number (default = 0)\n"
+"  -r 0x<reg>    start register\n";
+
+BAREBOX_CMD_START(i2c_write)
+	.cmd		= do_i2c_write,
+	.usage		= "write to an i2c device",
+	BAREBOX_CMD_HELP(cmd_i2c_write_help)
+BAREBOX_CMD_END
+
+static int do_i2c_read(struct command *cmdtp, int argc, char *argv[])
+{
+	struct i2c_adapter *adapter = NULL;
+	struct i2c_client client;
+	u8 *buf;
+	int count = -1, addr = -1, reg = -1, verbose = 0, ret, opt, bus = 0;
+
+	while ((opt = getopt(argc, argv, "a:b:c:r:v")) > 0) {
+		switch (opt) {
+		case 'a':
+			addr = simple_strtol(optarg, NULL, 0);
+			break;
+		case 'c':
+			count = simple_strtoul(optarg, NULL, 0);
+			break;
+		case 'b':
+			bus = simple_strtoul(optarg, NULL, 0);
+			break;
+		case 'r':
+			reg = simple_strtol(optarg, NULL, 0);
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		}
+	}
+
+	if ((addr < 0) || (reg < 0) || (count == 0) || (addr > 0x7F))
+		return COMMAND_ERROR_USAGE;
+
+	adapter = i2c_get_adapter(bus);
+	if (!adapter)
+		return -ENODEV;
+
+	client.adapter = adapter;
+	client.addr = addr;
+
+	buf = xmalloc(count);
+	ret = i2c_read_reg(&client, reg, buf, count);
+	if (ret == count) {
+		int i;
+		if (verbose)
+			printf("read %i bytes starting at reg 0x%02x from i2cdev 0x%02x on bus %i\n",
+				count, reg, addr, adapter->nr);
+		for (i = 0; i < count; i++)
+			printf("0x%02x ", *(buf + i));
+		printf("\n");
+		ret = 0;
+	}
+
+	free(buf);
+	return ret;
+}
+
+static const __maybe_unused char cmd_i2c_read_help[] =
+"Usage: i2c_read [OPTION]\n"
+"read i2c device.\n"
+"  -a 0x<addr>   i2c device address\n"
+"  -b <bus_num>  i2c bus number (default = 0)\n"
+"  -r 0x<reg>    start register\n"
+"  -c <count>    byte count\n";
+
+BAREBOX_CMD_START(i2c_read)
+	.cmd		= do_i2c_read,
+	.usage		= "read from an i2c device",
+	BAREBOX_CMD_HELP(cmd_i2c_read_help)
+BAREBOX_CMD_END
-- 
1.6.3.3


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Re: [PATCH v4 3/6] commands: add i2c commands

[Marc Kleine-Budde]

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Hey,

Eric Bénard wrote:
> Le 25/05/2010 11:02, Marc Kleine-Budde a écrit :
>>> +        case 'b':
>>> +            adapter = i2c_get_adapter(simple_strtoul(optarg, NULL, 0));
>>
>> I'd just save the optarg in a variable...
>>
>>> +            break;
>>> +        case 'v':
>>> +            verbose = 1;
>>> +            break;
>>> +        }
>>> +    }
>>> +
>>> +    count = argc - optind;
>>> +
>>> +    if ((addr<  0) || (reg<  0) || (count == 0) || (addr>  0x7F))
>>> +        return COMMAND_ERROR_USAGE;
>>> +
>>> +    if (!adapter)
>>> +        adapter = i2c_get_adapter(0);
>>
>> and use it here. Because if you specify an invalid adapter number,
>> adapter 0 will be used silently (if it exists).
>>
> you're right, in fact I should exit in the case 'b' handling if the
> adapter doesn't exist, that will be simpler.

ACK, I'd do that here.....

int adapter_number = 0;

...

	case 'b':
		adapter_number = simple_strtoul(optarg, NULL, 0);
		break;
...

adapter = i2c_get_adapter(adapter_number);
if (!adapter) {
	printf("adapter %d not found\n", adapter_number);
	return -ENODEV
}

>>> +    if (!adapter)
>>> +        return -ENODEV;
>>> +
>>> +    client.adapter = adapter;
>>> +    client.addr = addr;
>>> +
>>> +    buf = xmalloc(count);
>>> +    for (i = 0; i<  count; i++)
>>> +        *(buf + i) = (char) simple_strtol(argv[optind+i], NULL, 16);

codingstyle...no space after the cast, but before and after the "+"

(char)simple_strtol(argv[optind + i], NULL, 16);

>>> +
>>> +    ret = i2c_write_reg(&client, reg, buf, count);
>>> +    if (ret != count)
>>> +        goto out;
>>
>> better set a return value indicating an error here...
> ret should already be set by i2c_write_reg so it there is no error, I
> can simply set ret to 0.

ACK

>>
>>> +
>>> +    if (verbose) {
>>> +        printf("wrote %i bytes starting at reg 0x%02x to i2cdev
>>> 0x%02x on bus %i\n",
>>> +            count, reg, addr, adapter->nr);
>>> +        for (i = 0; i<  count; i++)
>>> +            printf("0x%02x ", *(buf + i));
>>> +        printf("\n");
>>> +    }
>>> +
>>> +out:
>>> +    free(buf);
>>> +    return 0;
>>
>> ... and return it here.
> 
> yes, that should be return ret
> 
> Eric

Marc
-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |


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Re: [PATCH v4 3/6] commands: add i2c commands

[Eric Bénard]

Hi,

Le 25/05/2010 11:32, Marc Kleine-Budde a écrit :
>
> adapter = i2c_get_adapter(adapter_number);
> if (!adapter) {
> 	printf("adapter %d not found\n", adapter_number);
> 	return -ENODEV
> }
>
I did that without the log after sending the email (should have think a 
little bit more before sending the mail) : is a v6 necessary for this log ?

Eric

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Re: [PATCH v4 3/6] commands: add i2c commands

[Marc Kleine-Budde]

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Eric Bénard wrote:
> Hi,
> 
> Le 25/05/2010 11:32, Marc Kleine-Budde a écrit :
>>
>> adapter = i2c_get_adapter(adapter_number);
>> if (!adapter) {
>>     printf("adapter %d not found\n", adapter_number);
>>     return -ENODEV
>> }
>>
> I did that without the log after sending the email (should have think a
> little bit more before sending the mail) : is a v6 necessary for this log ?

I think sha would be happier if he can just apply your patch series (or
even pull it) without the need to modify it.

Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |


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Re: [PATCH v4 3/6] commands: add i2c commands

[Eric Bénard]

Le 25/05/2010 11:47, Marc Kleine-Budde a écrit :
> I think sha would be happier if he can just apply your patch series (or
> even pull it) without the need to modify it.
>
OK patch serie following soon, hope no more changes are needed ;-)

Eric

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[PATCH 1/6] i2c-imx: change log level for No ACK

[Eric Bénard]

Signed-off-by: Eric Bénard <eric@eukrea.com>
---
 drivers/i2c/i2c-imx.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/i2c/i2c-imx.c b/drivers/i2c/i2c-imx.c
index 03e3785..cc64d94 100644
--- a/drivers/i2c/i2c-imx.c
+++ b/drivers/i2c/i2c-imx.c
@@ -214,7 +214,7 @@ static int i2c_imx_acked(struct i2c_adapter *adapter)
 			break;
 
 		if (is_timeout(start, MSECOND)) {
-			dev_err(adapter->dev, "<%s> No ACK\n", __func__);
+			dev_dbg(adapter->dev, "<%s> No ACK\n", __func__);
 			return -EIO;
 		}
 	}
-- 
1.6.3.3


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