[U-Boot] [PATCH] i.MX6Q: mx6qsabrelite: Add keypress support to alter boot flow

[U-Boot] [PATCH] i.MX6Q: mx6qsabrelite: Add keypress support to alter boot flow

[Eric Nelson]

Uses the 'magic_keys' idiom as described in doc/README.kbd:
	http://lists.denx.de/pipermail/u-boot/2012-April/122502.html

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
Acked-by: Marek Vasut <marex@denx.de>
---
 board/freescale/mx6qsabrelite/mx6qsabrelite.c |  122 ++++++++++++++++++++++++-
 include/configs/mx6qsabrelite.h               |    3 +
 2 files changed, 123 insertions(+), 2 deletions(-)

diff --git a/board/freescale/mx6qsabrelite/mx6qsabrelite.c b/board/freescale/mx6qsabrelite/mx6qsabrelite.c
index db5e775..f63cef7 100644
--- a/board/freescale/mx6qsabrelite/mx6qsabrelite.c
+++ b/board/freescale/mx6qsabrelite/mx6qsabrelite.c
@@ -52,6 +52,10 @@ DECLARE_GLOBAL_DATA_PTR;
 	PAD_CTL_PUS_100K_DOWN | PAD_CTL_SPEED_MED |		\
 	PAD_CTL_DSE_40ohm     | PAD_CTL_SRE_FAST)
 
+#define BUTTON_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |		\
+	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED   |		\
+	PAD_CTL_DSE_40ohm   | PAD_CTL_HYS)
+
 int dram_init(void)
 {
        gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
@@ -124,6 +128,22 @@ iomux_v3_cfg_t enet_pads2[] = {
 	MX6Q_PAD_RGMII_RX_CTL__RGMII_RX_CTL	| MUX_PAD_CTRL(ENET_PAD_CTRL),
 };
 
+/* Button assignments for J14 */
+static iomux_v3_cfg_t button_pads[] = {
+	/* Menu */
+	MX6Q_PAD_NANDF_D1__GPIO_2_1	| MUX_PAD_CTRL(BUTTON_PAD_CTRL),
+	/* Back */
+	MX6Q_PAD_NANDF_D2__GPIO_2_2	| MUX_PAD_CTRL(BUTTON_PAD_CTRL),
+	/* Labelled Search (mapped to Power under Android) */
+	MX6Q_PAD_NANDF_D3__GPIO_2_3	| MUX_PAD_CTRL(BUTTON_PAD_CTRL),
+	/* Home */
+	MX6Q_PAD_NANDF_D4__GPIO_2_4	| MUX_PAD_CTRL(BUTTON_PAD_CTRL),
+	/* Volume Down */
+	MX6Q_PAD_GPIO_19__GPIO_4_5	| MUX_PAD_CTRL(BUTTON_PAD_CTRL),
+	/* Volume Up */
+	MX6Q_PAD_GPIO_18__GPIO_7_13	| MUX_PAD_CTRL(BUTTON_PAD_CTRL),
+};
+
 static void setup_iomux_enet(void)
 {
 	gpio_direction_output(87, 0);  /* GPIO 3-23 */
@@ -295,11 +315,18 @@ int setup_sata(void)
 }
 #endif
 
+static void setup_buttons(void)
+{
+	imx_iomux_v3_setup_multiple_pads(button_pads,
+					 ARRAY_SIZE(button_pads));
+}
+
 int board_early_init_f(void)
 {
-       setup_iomux_uart();
+	setup_iomux_uart();
+	setup_buttons();
 
-       return 0;
+	return 0;
 }
 
 int board_init(void)
@@ -324,3 +351,94 @@ int checkboard(void)
 
        return 0;
 }
+
+struct button_key {
+	char const	*name;
+	unsigned	gpnum;
+	char		ident;
+};
+
+static struct button_key const buttons[] = {
+	{"back",	GPIO_NUMBER(2, 2),	'B'},
+	{"home",	GPIO_NUMBER(2, 4),	'H'},
+	{"menu",	GPIO_NUMBER(2, 1),	'M'},
+	{"search",	GPIO_NUMBER(2, 3),	'S'},
+	{"volup",	GPIO_NUMBER(7, 13),	'V'},
+	{"voldown",	GPIO_NUMBER(4, 5),	'v'},
+};
+
+/*
+ * generate a null-terminated string containing the buttons pressed
+ * returns number of keys pressed
+ */
+static int read_keys(char *buf)
+{
+	int i, numpressed = 0;
+	for (i = 0; i < ARRAY_SIZE(buttons); i++) {
+		if (!gpio_get_value(buttons[i].gpnum))
+			buf[numpressed++] = buttons[i].ident;
+	}
+	buf[numpressed] = '\0';
+	return numpressed;
+}
+
+static int do_kbd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	char envvalue[ARRAY_SIZE(buttons)+1];
+	int numpressed = read_keys(envvalue);
+	setenv("keybd", envvalue);
+	return numpressed == 0;
+}
+
+U_BOOT_CMD(
+	kbd, 1, 1, do_kbd,
+	"Tests for keypresses, sets 'keybd' environment variable",
+	"Returns 0 (true) to shell if key is pressed."
+);
+
+#ifdef CONFIG_PREBOOT
+static char const kbd_magic_prefix[] = "key_magic";
+static char const kbd_command_prefix[] = "key_cmd";
+
+static void preboot_keys(void)
+{
+	int numpressed;
+	char keypress[ARRAY_SIZE(buttons)+1];
+	numpressed = read_keys(keypress);
+	if (numpressed) {
+		char *kbd_magic_keys = getenv("magic_keys");
+		char *suffix;
+		/*
+		 * loop over all magic keys
+		 */
+		for (suffix = kbd_magic_keys; *suffix; ++suffix) {
+			char *keys;
+			char magic[sizeof(kbd_magic_prefix) + 1];
+			sprintf(magic, "%s%c", kbd_magic_prefix, *suffix);
+			keys = getenv(magic);
+			if (keys) {
+				if (!strcmp(keys, keypress))
+					break;
+			}
+		}
+		if (*suffix) {
+			char cmd_name[sizeof(kbd_command_prefix) + 1];
+			char *cmd;
+			sprintf(cmd_name, "%s%c", kbd_command_prefix, *suffix);
+			cmd = getenv(cmd_name);
+			if (cmd) {
+				setenv("preboot", cmd);
+				return;
+			}
+		}
+	}
+}
+#endif
+
+int misc_init_r(void)
+{
+#ifdef CONFIG_PREBOOT
+	preboot_keys();
+#endif
+	return 0;
+}
diff --git a/include/configs/mx6qsabrelite.h b/include/configs/mx6qsabrelite.h
index 50b5c31..c0511c7 100644
--- a/include/configs/mx6qsabrelite.h
+++ b/include/configs/mx6qsabrelite.h
@@ -42,6 +42,7 @@
 
 #define CONFIG_ARCH_CPU_INIT
 #define CONFIG_BOARD_EARLY_INIT_F
+#define CONFIG_MISC_INIT_R
 #define CONFIG_MXC_GPIO
 
 #define CONFIG_MXC_UART
@@ -123,6 +124,8 @@
 
 #define CONFIG_BOOTDELAY	       3
 
+#define CONFIG_PREBOOT                 ""
+
 #define CONFIG_LOADADDR			       0x10800000
 #define CONFIG_SYS_TEXT_BASE	       0x17800000
 
-- 
1.7.9

[U-Boot] [PATCH] i.MX6Q: mx6qsabrelite: Add keypress support to alter boot flow

[Marek Vasut]

Dear Eric Nelson,

> Uses the 'magic_keys' idiom as described in doc/README.kbd:
> 	http://lists.denx.de/pipermail/u-boot/2012-April/122502.html


If this is a V2 of a patch, please send is as "in-reply-to" and descibe the 
changes below (at spot marked V2 (and V3 etc))... Also, change the keywork 
"PATCH" in teh subject to teh "PATCH V2" etc ;-)

> 
> Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
> Acked-by: Marek Vasut <marex@denx.de>
> ---

V2: <changes>

This is just a nitpick though (and I got about similar scolding in the LAKML 
today, so don't let it bother you ;-) ), thanks for your work ;-)

>  board/freescale/mx6qsabrelite/mx6qsabrelite.c |  122
> ++++++++++++++++++++++++- include/configs/mx6qsabrelite.h               | 
>   3 +
>  2 files changed, 123 insertions(+), 2 deletions(-)
> 
> diff --git a/board/freescale/mx6qsabrelite/mx6qsabrelite.c
> b/board/freescale/mx6qsabrelite/mx6qsabrelite.c index db5e775..f63cef7
> 100644
> --- a/board/freescale/mx6qsabrelite/mx6qsabrelite.c
> +++ b/board/freescale/mx6qsabrelite/mx6qsabrelite.c
> @@ -52,6 +52,10 @@ DECLARE_GLOBAL_DATA_PTR;
>  	PAD_CTL_PUS_100K_DOWN | PAD_CTL_SPEED_MED |		\
>  	PAD_CTL_DSE_40ohm     | PAD_CTL_SRE_FAST)
> 
> +#define BUTTON_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |		\
> +	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED   |		\
> +	PAD_CTL_DSE_40ohm   | PAD_CTL_HYS)
> +
>  int dram_init(void)
>  {
>         gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
> @@ -124,6 +128,22 @@ iomux_v3_cfg_t enet_pads2[] = {
>  	MX6Q_PAD_RGMII_RX_CTL__RGMII_RX_CTL	| MUX_PAD_CTRL(ENET_PAD_CTRL),
>  };
> 
> +/* Button assignments for J14 */
> +static iomux_v3_cfg_t button_pads[] = {
> +	/* Menu */
> +	MX6Q_PAD_NANDF_D1__GPIO_2_1	| MUX_PAD_CTRL(BUTTON_PAD_CTRL),
> +	/* Back */
> +	MX6Q_PAD_NANDF_D2__GPIO_2_2	| MUX_PAD_CTRL(BUTTON_PAD_CTRL),
> +	/* Labelled Search (mapped to Power under Android) */
> +	MX6Q_PAD_NANDF_D3__GPIO_2_3	| MUX_PAD_CTRL(BUTTON_PAD_CTRL),
> +	/* Home */
> +	MX6Q_PAD_NANDF_D4__GPIO_2_4	| MUX_PAD_CTRL(BUTTON_PAD_CTRL),
> +	/* Volume Down */
> +	MX6Q_PAD_GPIO_19__GPIO_4_5	| MUX_PAD_CTRL(BUTTON_PAD_CTRL),
> +	/* Volume Up */
> +	MX6Q_PAD_GPIO_18__GPIO_7_13	| MUX_PAD_CTRL(BUTTON_PAD_CTRL),
> +};
> +
>  static void setup_iomux_enet(void)
>  {
>  	gpio_direction_output(87, 0);  /* GPIO 3-23 */
> @@ -295,11 +315,18 @@ int setup_sata(void)
>  }
>  #endif
> 
> +static void setup_buttons(void)
> +{
> +	imx_iomux_v3_setup_multiple_pads(button_pads,
> +					 ARRAY_SIZE(button_pads));
> +}
> +
>  int board_early_init_f(void)
>  {
> -       setup_iomux_uart();
> +	setup_iomux_uart();
> +	setup_buttons();
> 
> -       return 0;
> +	return 0;
>  }
> 
>  int board_init(void)
> @@ -324,3 +351,94 @@ int checkboard(void)
> 
>         return 0;
>  }
> +
> +struct button_key {
> +	char const	*name;
> +	unsigned	gpnum;
> +	char		ident;
> +};
> +
> +static struct button_key const buttons[] = {
> +	{"back",	GPIO_NUMBER(2, 2),	'B'},
> +	{"home",	GPIO_NUMBER(2, 4),	'H'},
> +	{"menu",	GPIO_NUMBER(2, 1),	'M'},
> +	{"search",	GPIO_NUMBER(2, 3),	'S'},
> +	{"volup",	GPIO_NUMBER(7, 13),	'V'},
> +	{"voldown",	GPIO_NUMBER(4, 5),	'v'},
> +};
> +
> +/*
> + * generate a null-terminated string containing the buttons pressed
> + * returns number of keys pressed
> + */
> +static int read_keys(char *buf)
> +{
> +	int i, numpressed = 0;
> +	for (i = 0; i < ARRAY_SIZE(buttons); i++) {
> +		if (!gpio_get_value(buttons[i].gpnum))
> +			buf[numpressed++] = buttons[i].ident;
> +	}
> +	buf[numpressed] = '\0';
> +	return numpressed;
> +}
> +
> +static int do_kbd(cmd_tbl_t *cmdtp, int flag, int argc, char * const
> argv[]) +{
> +	char envvalue[ARRAY_SIZE(buttons)+1];
> +	int numpressed = read_keys(envvalue);
> +	setenv("keybd", envvalue);
> +	return numpressed == 0;
> +}
> +
> +U_BOOT_CMD(
> +	kbd, 1, 1, do_kbd,
> +	"Tests for keypresses, sets 'keybd' environment variable",
> +	"Returns 0 (true) to shell if key is pressed."
> +);
> +
> +#ifdef CONFIG_PREBOOT
> +static char const kbd_magic_prefix[] = "key_magic";
> +static char const kbd_command_prefix[] = "key_cmd";
> +
> +static void preboot_keys(void)
> +{
> +	int numpressed;
> +	char keypress[ARRAY_SIZE(buttons)+1];
> +	numpressed = read_keys(keypress);
> +	if (numpressed) {
> +		char *kbd_magic_keys = getenv("magic_keys");
> +		char *suffix;
> +		/*
> +		 * loop over all magic keys
> +		 */
> +		for (suffix = kbd_magic_keys; *suffix; ++suffix) {
> +			char *keys;
> +			char magic[sizeof(kbd_magic_prefix) + 1];
> +			sprintf(magic, "%s%c", kbd_magic_prefix, *suffix);
> +			keys = getenv(magic);
> +			if (keys) {
> +				if (!strcmp(keys, keypress))
> +					break;
> +			}
> +		}
> +		if (*suffix) {
> +			char cmd_name[sizeof(kbd_command_prefix) + 1];
> +			char *cmd;
> +			sprintf(cmd_name, "%s%c", kbd_command_prefix, *suffix);
> +			cmd = getenv(cmd_name);
> +			if (cmd) {
> +				setenv("preboot", cmd);
> +				return;
> +			}
> +		}
> +	}
> +}
> +#endif
> +
> +int misc_init_r(void)
> +{
> +#ifdef CONFIG_PREBOOT
> +	preboot_keys();
> +#endif
> +	return 0;
> +}
> diff --git a/include/configs/mx6qsabrelite.h
> b/include/configs/mx6qsabrelite.h index 50b5c31..c0511c7 100644
> --- a/include/configs/mx6qsabrelite.h
> +++ b/include/configs/mx6qsabrelite.h
> @@ -42,6 +42,7 @@
> 
>  #define CONFIG_ARCH_CPU_INIT
>  #define CONFIG_BOARD_EARLY_INIT_F
> +#define CONFIG_MISC_INIT_R
>  #define CONFIG_MXC_GPIO
> 
>  #define CONFIG_MXC_UART
> @@ -123,6 +124,8 @@
> 
>  #define CONFIG_BOOTDELAY	       3
> 
> +#define CONFIG_PREBOOT                 ""
> +
>  #define CONFIG_LOADADDR			       0x10800000
>  #define CONFIG_SYS_TEXT_BASE	       0x17800000

[U-Boot] [PATCH] i.MX6Q: mx6qsabrelite: Add keypress support to alter boot flow

[Eric Nelson]

On 04/25/2012 05:17 PM, Marek Vasut wrote:
> Dear Eric Nelson,
>
>> Uses the 'magic_keys' idiom as described in doc/README.kbd:
>> 	http://lists.denx.de/pipermail/u-boot/2012-April/122502.html
>
>
> If this is a V2 of a patch, please send is as "in-reply-to" and descibe the
> changes below (at spot marked V2 (and V3 etc))... Also, change the keywork
> "PATCH" in teh subject to teh "PATCH V2" etc ;-)
>
>>
>> Signed-off-by: Eric Nelson<eric.nelson@boundarydevices.com>
>> Acked-by: Marek Vasut<marex@denx.de>
>> ---
>
> V2:<changes>
>
> This is just a nitpick though (and I got about similar scolding in the LAKML
> today, so don't let it bother you ;-) ), thanks for your work ;-)
>

Thanks Marek.

I coulda sworn I did that, but apparently not...

[U-Boot] [PATCH] i.MX6Q: mx6qsabrelite: Add keypress support to alter boot flow

[Marek Vasut]

Dear Eric Nelson,

> On 04/25/2012 05:17 PM, Marek Vasut wrote:
> > Dear Eric Nelson,
> > 
> >> Uses the 'magic_keys' idiom as described in doc/README.kbd:
> >> 	http://lists.denx.de/pipermail/u-boot/2012-April/122502.html
> > 
> > If this is a V2 of a patch, please send is as "in-reply-to" and descibe
> > the changes below (at spot marked V2 (and V3 etc))... Also, change the
> > keywork "PATCH" in teh subject to teh "PATCH V2" etc ;-)
> > 
> >> Signed-off-by: Eric Nelson<eric.nelson@boundarydevices.com>
> >> Acked-by: Marek Vasut<marex@denx.de>
> >> ---
> > 
> > V2:<changes>
> > 
> > This is just a nitpick though (and I got about similar scolding in the
> > LAKML today, so don't let it bother you ;-) ), thanks for your work ;-)
> 
> Thanks Marek.
> 
> I coulda sworn I did that, but apparently not...

Happens to everyone, don't worry about it :)

Best regards,
Marek Vasut

[U-Boot] [PATCH] i.MX6Q: mx6qsabrelite: Add keypress support to alter boot flow

[Stefano Babic]

On 26/04/2012 12:12, Marek Vasut wrote:
> Dear Eric Nelson,
> 
>> On 04/25/2012 05:17 PM, Marek Vasut wrote:
>>> Dear Eric Nelson,
>>>
>>>> Uses the 'magic_keys' idiom as described in doc/README.kbd:
>>>> 	http://lists.denx.de/pipermail/u-boot/2012-April/122502.html
>>>
>>> If this is a V2 of a patch, please send is as "in-reply-to" and descibe
>>> the changes below (at spot marked V2 (and V3 etc))... Also, change the
>>> keywork "PATCH" in teh subject to teh "PATCH V2" etc ;-)
>>>
>>>> Signed-off-by: Eric Nelson<eric.nelson@boundarydevices.com>
>>>> Acked-by: Marek Vasut<marex@denx.de>
>>>> ---
>>>
>>> V2:<changes>
>>>
>>> This is just a nitpick though (and I got about similar scolding in the
>>> LAKML today, so don't let it bother you ;-) ), thanks for your work ;-)
>>
>> Thanks Marek.
>>
>> I coulda sworn I did that, but apparently not...

Apart of that, patch looks good, I am going to merge it.

Acked-by: Stefano Babic <sbabic@denx.de>

Best regards,
Stefano Babic


-- 
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================

[U-Boot] [PATCH] i.MX6Q: mx6qsabrelite: Add keypress support to alter boot flow

[Stefano Babic]

On 26/04/2012 02:14, Eric Nelson wrote:
> Uses the 'magic_keys' idiom as described in doc/README.kbd:
> 	http://lists.denx.de/pipermail/u-boot/2012-April/122502.html
> 
> Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
> Acked-by: Marek Vasut <marex@denx.de>
> ---

Applied after rebasing on current u-boot-imx, thanks.

Best regards,
Stefano Babic

-- 
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================

[U-Boot] [PATCH] i.MX6Q: mx6qsabrelite: Add keypress support to alter boot flow

[Eric Nelson]

On 04/29/2012 07:59 AM, Stefano Babic wrote:
> On 26/04/2012 02:14, Eric Nelson wrote:
>> Uses the 'magic_keys' idiom as described in doc/README.kbd:
>> 	http://lists.denx.de/pipermail/u-boot/2012-April/122502.html
>>
>> Signed-off-by: Eric Nelson<eric.nelson@boundarydevices.com>
>> Acked-by: Marek Vasut<marex@denx.de>
>> ---
>
> Applied after rebasing on current u-boot-imx, thanks.
>
Thanks Stefano,

I'm never quite sure whether I should submit patches against u-boot-imx
or the mainline head.

[U-Boot] [PATCH] i.MX6Q: mx6qsabrelite: Add keypress support to alter boot flow

[stefano babic]

Am 29/04/2012 20:24, schrieb Eric Nelson:
> On 04/29/2012 07:59 AM, Stefano Babic wrote:
>> On 26/04/2012 02:14, Eric Nelson wrote:
>>> Uses the 'magic_keys' idiom as described in doc/README.kbd:
>>>     http://lists.denx.de/pipermail/u-boot/2012-April/122502.html
>>>
>>> Signed-off-by: Eric Nelson<eric.nelson@boundarydevices.com>
>>> Acked-by: Marek Vasut<marex@denx.de>
>>> ---
>>
>> Applied after rebasing on current u-boot-imx, thanks.
>>
> Thanks Stefano,
> 
> I'm never quite sure whether I should submit patches against u-boot-imx
> or the mainline head.

Of course it should be enough to submit patches against mainline - only
in the time approaching the release (as it was for your patch) I have
the problem I must postpone patches for the next release, putting them
on the -next branch, and then some rebasing is needed.

Stefano

-- 
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de
=====================================================================