[PATCH 0/2 v4] add spi command

[PATCH 0/2 v4] add spi command

[Jean-Christophe PLAGNIOL-VILLARD]

HI,

	v4:
	do not touch the atmel_spi

	v3:
	call setup before accesing the device
	This was working properly on at91 as the driver is wrong.
	It call setup for every transfer. I will fix the atmel_spi.

	v2:
	add default return usage
	use memory_display

	while debugging a spi issue I found we have a i2c commands but no spi
	command

	So introduce one

The following changes since commit 56371f4e8446d04d2a5608dd5890fd87a50f888e:

  iomux-imx35: add missing comma in pad definition (2012-11-01 16:32:12 +0100)

are available in the git repository at:

  git://git.jcrosoft.org/barebox.git delivery/command_spi

for you to fetch changes up to 268e3d4f67da35571159fd096c62fa2e660783b0:

  introduce spi command (2012-11-05 11:13:25 +0800)

----------------------------------------------------------------
Jean-Christophe PLAGNIOL-VILLARD (2):
      spi: introduce spi_get_master
      introduce spi command

 commands/Kconfig  |    6 ++++++
 commands/Makefile |    1 +
 commands/spi.c    |  132 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 drivers/spi/spi.c |   12 ++++++++++++
 include/spi/spi.h |    2 ++
 5 files changed, 153 insertions(+)
 create mode 100644 commands/spi.c

Best Regards,
J.

_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

[PATCH 1/2] spi: introduce spi_get_master

[Jean-Christophe PLAGNIOL-VILLARD]

so we can request a master usefull for the spi command

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 drivers/spi/spi.c |   12 ++++++++++++
 include/spi/spi.h |    2 ++
 2 files changed, 14 insertions(+)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 44040e5..6a5bd6d 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -219,6 +219,18 @@ int spi_register_master(struct spi_master *master)
 }
 EXPORT_SYMBOL(spi_register_master);
 
+struct spi_master *spi_get_master(int bus)
+{
+	struct spi_master* m;
+
+	list_for_each_entry(m, &spi_master_list, list) {
+		if (m->bus_num == bus)
+			return m;
+	}
+
+	return NULL;
+}
+
 int spi_sync(struct spi_device *spi, struct spi_message *message)
 {
 	return spi->master->transfer(spi, message);
diff --git a/include/spi/spi.h b/include/spi/spi.h
index 1773ca2..d6570a4 100644
--- a/include/spi/spi.h
+++ b/include/spi/spi.h
@@ -432,6 +432,8 @@ static inline ssize_t spi_w8r8(struct spi_device *spi, u8 cmd)
 
 extern struct bus_type spi_bus;
 
+struct spi_master *spi_get_master(int bus);
+
 static inline int spi_register_driver(struct driver_d *drv)
 {
 	drv->bus = &spi_bus;
-- 
1.7.10.4


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

[PATCH 2/2] introduce spi command

[Jean-Christophe PLAGNIOL-VILLARD]

usefull to debug spi

The command allow to read/write on a spi device

Usage: spi [OPTION] [data to write 0xXX]
write/read spi device.
  -b <bus_num>  spi bus number (default = 0)
  -r <count>    to read
  -c <cs>       chip select (default = 0)
  -m <mode>     spi mode (default = 0)
  -f <hz>       max_speed_hz (default = 1MHz)
  -w <bit>      bits_per_word (default = 8)
  -v            verbose

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 commands/Kconfig  |    6 +++
 commands/Makefile |    1 +
 commands/spi.c    |  132 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 139 insertions(+)
 create mode 100644 commands/spi.c

diff --git a/commands/Kconfig b/commands/Kconfig
index 16706d3..f7cbd67 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -597,6 +597,12 @@ config CMD_I2C
 	  include i2c_probe, i2c_read and i2c_write commands to communicate
 	  on i2c bus.
 
+config CMD_SPI
+	bool
+	depends on SPI
+	prompt "spi command"
+	help
+
 config CMD_LED
 	bool
 	depends on LED
diff --git a/commands/Makefile b/commands/Makefile
index 610be55..19d496e 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -55,6 +55,7 @@ obj-$(CONFIG_USB_GADGET_SERIAL)	+= usbserial.o
 obj-$(CONFIG_CMD_GPIO)		+= gpio.o
 obj-$(CONFIG_CMD_UNCOMPRESS)	+= uncompress.o
 obj-$(CONFIG_CMD_I2C)		+= i2c.o
+obj-$(CONFIG_CMD_SPI)		+= spi.o
 obj-$(CONFIG_CMD_UBI)		+= ubi.o
 obj-$(CONFIG_CMD_MENU)		+= menu.o
 obj-$(CONFIG_CMD_PASSWD)	+= passwd.o
diff --git a/commands/spi.c b/commands/spi.c
new file mode 100644
index 0000000..899bf62
--- /dev/null
+++ b/commands/spi.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ *
+ * Under GPLv2 only
+ *
+ */
+
+#include <common.h>
+#include <command.h>
+#include <errno.h>
+#include <malloc.h>
+#include <getopt.h>
+#include <spi/spi.h>
+
+static int do_spi(int argc, char *argv[])
+{
+	struct spi_device spi;
+	int bus = 0;
+	int read = 0;
+	int verbose = 0;
+	int opt, count, i, ret;
+	int byte_per_word;
+
+	u8 *tx_buf, *rx_buf;
+
+	memset(&spi, 0, sizeof(struct spi_device));
+
+	spi.max_speed_hz = 1 * 1000 * 1000;
+	spi.bits_per_word = 8;
+
+	while ((opt = getopt(argc, argv, "b:c:r:m:f:w:v")) > 0) {
+		switch (opt) {
+		case 'b':
+			bus = simple_strtol(optarg, NULL, 0);
+			break;
+		case 'r':
+			read = simple_strtol(optarg, NULL, 0);
+			break;
+		case 'c':
+			spi.chip_select = simple_strtoul(optarg, NULL, 0);
+			break;
+		case 'm':
+			spi.mode = simple_strtoul(optarg, NULL, 0);
+			break;
+		case 'f':
+			spi.max_speed_hz = simple_strtoul(optarg, NULL, 0);
+			break;
+		case 'w':
+			spi.bits_per_word = simple_strtoul(optarg, NULL, 0);
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		default:
+			return COMMAND_ERROR_USAGE;
+		}
+	}
+
+	count = argc - optind;
+
+	if ((!read && !count) || !spi.max_speed_hz || !spi.bits_per_word)
+		return COMMAND_ERROR_USAGE;
+
+
+	spi.master = spi_get_master(bus);
+	if (!spi.master) {
+		printf("spi bus %d not found\n", bus);
+		return -ENODEV;
+	}
+
+	if (spi.chip_select > spi.master->num_chipselect) {
+		printf("spi chip select (%d)> master num chipselect (%d)\n",
+			spi.chip_select, spi.master->num_chipselect);
+		return -EINVAL;
+	}
+
+	ret = spi.master->setup(&spi);
+	if (ret) {
+		printf("can not setup the master (%d)\n", ret);
+		return ret;
+	}
+
+	tx_buf = xmalloc(count);
+	rx_buf = xmalloc(count);
+
+	for (i = 0; i < count; i++)
+		tx_buf[i] = (u8) simple_strtol(argv[optind + i], NULL, 16);
+
+	ret = spi_write_then_read(&spi, tx_buf, count, rx_buf, read);
+	if (ret)
+		goto out;
+
+	byte_per_word = max(spi.bits_per_word / 8, 1);
+	if (verbose) {
+		printf("device config\n");
+		printf("    bus_num       = %d\n", spi.master->bus_num);
+		printf("    max_speed_hz  = %d\n", spi.max_speed_hz);
+		printf("    chip_select   = %d\n", spi.chip_select);
+		printf("    mode          = 0x%x\n", spi.mode);
+		printf("    bits_per_word = %d\n", spi.bits_per_word);
+		printf("\n");
+
+		printf("wrote %i bytes\n", count);
+		memory_display(tx_buf, 0, count, byte_per_word);
+
+		printf("read %i bytes\n", read);
+	}
+
+	memory_display(rx_buf, 0, read, byte_per_word);
+
+out:
+	free(rx_buf);
+	free(tx_buf);
+	return ret;
+}
+
+static const __maybe_unused char cmd_spi_help[] =
+"Usage: spi [OPTION] [data to write 0xXX]\n"
+"write/read spi device.\n"
+"  -b <bus_num>  spi bus number (default = 0)\n"
+"  -r <count>    to read\n"
+"  -c <cs>       chip select (default = 0)\n"
+"  -m <mode>     spi mode (default = 0)\n"
+"  -f <hz>       max_speed_hz (default = 1MHz)\n"
+"  -w <bit>      bits_per_word (default = 8)\n"
+"  -v            verbose\n";
+
+BAREBOX_CMD_START(spi)
+	.cmd		= do_spi,
+	.usage		= "write/read spi device",
+	BAREBOX_CMD_HELP(cmd_spi_help)
+BAREBOX_CMD_END
-- 
1.7.10.4


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

Re: [PATCH 0/2 v4] add spi command

[Sascha Hauer]

On Mon, Nov 05, 2012 at 07:21:48PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> HI,
> 
> 	v4:
> 	do not touch the atmel_spi
> 
> 	v3:
> 	call setup before accesing the device
> 	This was working properly on at91 as the driver is wrong.
> 	It call setup for every transfer. I will fix the atmel_spi.
> 
> 	v2:
> 	add default return usage
> 	use memory_display
> 
> 	while debugging a spi issue I found we have a i2c commands but no spi
> 	command
> 
> 	So introduce one
> 
> The following changes since commit 56371f4e8446d04d2a5608dd5890fd87a50f888e:

Applied, thanks

Sascha

> 
>   iomux-imx35: add missing comma in pad definition (2012-11-01 16:32:12 +0100)
> 
> are available in the git repository at:
> 
>   git://git.jcrosoft.org/barebox.git delivery/command_spi
> 
> for you to fetch changes up to 268e3d4f67da35571159fd096c62fa2e660783b0:
> 
>   introduce spi command (2012-11-05 11:13:25 +0800)
> 
> ----------------------------------------------------------------
> Jean-Christophe PLAGNIOL-VILLARD (2):
>       spi: introduce spi_get_master
>       introduce spi command
> 
>  commands/Kconfig  |    6 ++++++
>  commands/Makefile |    1 +
>  commands/spi.c    |  132 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  drivers/spi/spi.c |   12 ++++++++++++
>  include/spi/spi.h |    2 ++
>  5 files changed, 153 insertions(+)
>  create mode 100644 commands/spi.c
> 
> Best Regards,
> J.
> 
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
> 

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox