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ARM: OMAP: Beagle: revision detection

PATCH Superseded Robert Nelson 2 participants 5 messages Aug 18, 2010 – Aug 20, 2010

Subsystems (3)
Arm (32-bit) Arm sub-architectures OMAP2+ support

v5 of 6 Superseded Latest is v6 →

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Robert Nelson

author
#0 lore raw

PATCH v5 1/3 ARM: OMAP: Beagle: revision detection

Due to the omap3530 ES3.0 Silicon being used on both the B5/B6 and C1/2/3 Beagle we can't use the cpu_is_omap34xx() routines to differentiate the Beagle Boards.

However gpio pins 171,172,173 where setup for this prupose, so lets use them.

Changes:
for older U-Boot's, use omap_mux_init_gpio()
keep Beagle Rev in board-omap3beagle.c
gpio_free on gpio request failure

Tested on Beagle Revisions: B5, C2, C4, and xMA

Signed-off-by Robert Nelson <[email protected]>
Cc Jarkko Nikula <[email protected]>
---
 arch/arm/mach-omap2/board-omap3beagle.c |   90 +++++++++++++++++++++++++++++++
 1 files changed, 90 insertions(+), 0 deletions(-)
arch/arm/mach-omap2/board-omap3beagle.c +90 -0
index 87969c7..62d69a9 100644
@@ -50,6 +50,95 @@
 
 #define NAND_BLOCK_SIZE		SZ_128K
 
+/*
+ * OMAP3 Beagle revision
+ * Run time detection of Beagle revision is done by reading GPIO.
+ * GPIO ID -
+ *	AXBX	= GPIO173, GPIO172, GPIO171: 1 1 1
+ *	C1_3	= GPIO173, GPIO172, GPIO171: 1 1 0
+ *	C4	= GPIO173, GPIO172, GPIO171: 1 0 1
+ *	XM	= GPIO173, GPIO172, GPIO171: 0 0 0
+ */
+enum {
+	OMAP3BEAGLE_BOARD_UNKN = 0,
+	OMAP3BEAGLE_BOARD_AXBX,
+	OMAP3BEAGLE_BOARD_C1_3,
+	OMAP3BEAGLE_BOARD_C4,
+	OMAP3BEAGLE_BOARD_XM,
+};
+
+static u8 omap3_beagle_version;
+
+static u8 omap3_beagle_get_rev(void)
+{
+	return omap3_beagle_version;
+}
+
+static void __init omap3_beagle_init_rev(void)
+{
+	int ret;
+	u16 beagle_rev = 0;
+
+	omap_mux_init_gpio(171, OMAP_PIN_INPUT_PULLUP);
+	omap_mux_init_gpio(172, OMAP_PIN_INPUT_PULLUP);
+	omap_mux_init_gpio(173, OMAP_PIN_INPUT_PULLUP);
+
+	ret = gpio_request(171, "rev_id_0");
+	if (ret < 0)
+		goto fail0;
+
+	ret = gpio_request(172, "rev_id_1");
+	if (ret < 0)
+		goto fail1;
+
+	ret = gpio_request(173, "rev_id_2");
+	if (ret < 0)
+		goto fail2;
+
+	gpio_direction_input(171);
+	gpio_direction_input(172);
+	gpio_direction_input(173);
+
+	beagle_rev = gpio_get_value(171) | (gpio_get_value(172) << 1)
+			| (gpio_get_value(173) << 2);
+
+	switch (beagle_rev) {
+	case 7:
+		printk(KERN_INFO "OMAP3 Beagle Rev: Ax/Bx\n");
+		omap3_beagle_version = OMAP3BEAGLE_BOARD_AXBX;
+		break;
+	case 6:
+		printk(KERN_INFO "OMAP3 Beagle Rev: C1/C2/C3\n");
+		omap3_beagle_version = OMAP3BEAGLE_BOARD_C1_3;
+		break;
+	case 5:
+		printk(KERN_INFO "OMAP3 Beagle Rev: C4\n");
+		omap3_beagle_version = OMAP3BEAGLE_BOARD_C4;
+		break;
+	case 0:
+		printk(KERN_INFO "OMAP3 Beagle Rev: xM\n");
+		omap3_beagle_version = OMAP3BEAGLE_BOARD_XM;
+		break;
+	default:
+		printk(KERN_INFO "OMAP3 Beagle Rev: unknown %hd\n", beagle_rev);
+		omap3_beagle_version = OMAP3BEAGLE_BOARD_UNKN;
+	}
+
+	return;
+
+fail2:
+	gpio_free(173);
+fail1:
+	gpio_free(172);
+fail0:
+	gpio_free(171);
+
+	printk(KERN_ERR "Unable to get revision detection GPIO pins\n");
+	omap3_beagle_version = OMAP3BEAGLE_BOARD_UNKN;
+
+	return;
+}
+
 static struct mtd_partition omap3beagle_nand_partitions[] = {
 	/* All the partition sizes are listed in terms of NAND block size */
 	{

@@ -464,6 +553,7 @@ static struct omap_musb_board_data musb_board_data = {
 static void __init omap3_beagle_init(void)
 {
 	omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
+	omap3_beagle_init_rev();
 	omap3_beagle_i2c_init();
 	platform_add_devices(omap3_beagle_devices,
 			ARRAY_SIZE(omap3_beagle_devices));
Signature · 1 line
1.7.0.4
author
#1 lore raw

PATCH v5 2/3 ARM: OMAP: Beagle: only Cx boards use pin 23 for write protect

system_rev comes from u-boot and is a constant 0x20, so Bx boards also fall in this 'if' and will get setup with the wrong gpio_wp pin. Switch to using the Beagle revision routine to correcly set pin 23 only for C1/2/3 and C4 Boards. Bx boards will then use the correct default pin setting.

Signed-off-by Robert Nelson <[email protected]>
---
 arch/arm/mach-omap2/board-omap3beagle.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
arch/arm/mach-omap2/board-omap3beagle.c +2 -1
index 62d69a9..e9af4fd 100644
@@ -274,7 +274,8 @@ static struct gpio_led gpio_leds[];
 static int beagle_twl_gpio_setup(struct device *dev,
 		unsigned gpio, unsigned ngpio)
 {
-	if (system_rev >= 0x20 && system_rev <= 0x34301000) {
+	if ((omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_C1_3) ||
+		(omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_C4)) {
 		omap_mux_init_gpio(23, OMAP_PIN_INPUT);
 		mmc[0].gpio_wp = 23;
 	} else {
Signature · 1 line
1.7.0.4
author
#2 lore raw

PATCH v5 3/3 ARM: OMAP: Beagle: no gpio_wp pin connection on xM

In reply to Robert Nelson

The omap3630 based BeagleBoard xM uses a MicroSD card slot with no write protection.

Signed-off-by Robert Nelson <[email protected]>
---
 arch/arm/mach-omap2/board-omap3beagle.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
arch/arm/mach-omap2/board-omap3beagle.c +3 -1
index e9af4fd..1f455c3 100644
@@ -274,7 +274,9 @@ static struct gpio_led gpio_leds[];
 static int beagle_twl_gpio_setup(struct device *dev,
 		unsigned gpio, unsigned ngpio)
 {
-	if ((omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_C1_3) ||
+	if (omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_XM) {
+		mmc[0].gpio_wp = -EINVAL;
+	} else if ((omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_C1_3) ||
 		(omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_C4)) {
 		omap_mux_init_gpio(23, OMAP_PIN_INPUT);
 		mmc[0].gpio_wp = 23;
Signature · 1 line
1.7.0.4
#3 lore raw
In reply to Robert Nelson
Quoted 11 lines · On Wed, 18 Aug 2010 10:56:51 -0500 Robert Nelson <[email protected]>…
arch/arm/mach-omap2/board-omap3beagle.c +11 -0
+	ret = gpio_request(171, "rev_id_0");
+	if (ret < 0)
+		goto fail0;
+
+	ret = gpio_request(172, "rev_id_1");
+	if (ret < 0)
+		goto fail1;
+
+	ret = gpio_request(173, "rev_id_2");
+	if (ret < 0)
+		goto fail2;

...

arch/arm/mach-omap2/board-omap3beagle.c line 134

Quoted 6 lines
arch/arm/mach-omap2/board-omap3beagle.c +6 -0
+fail2:
+	gpio_free(173);
+fail1:
+	gpio_free(172);
+fail0:
+	gpio_free(171);

This must be:

+fail2:
+ gpio_free(172);
+fail1:
+ gpio_free(171);
+fail0:

Otherwise the set looks good to me.

Signature · 1 line
Jarkko
author
#4 lore raw
Quoted 30 lines · Jarkko Nikula
Quoted 11 lines · On Wed, 18 Aug 2010 10:56:51 -0500 Robert Nelson <[email protected]>…

+     ret = gpio_request(171, "rev_id_0");
+     if (ret < 0)
+             goto fail0;

arch/arm/mach-omap2/board-omap3beagle.c +8 -0
+
+     ret = gpio_request(172, "rev_id_1");
+     if (ret < 0)
+             goto fail1;
+
+     ret = gpio_request(173, "rev_id_2");
+     if (ret < 0)
+             goto fail2;

...

arch/arm/mach-omap2/board-omap3beagle.c line 134

Quoted 6 lines
arch/arm/mach-omap2/board-omap3beagle.c +6 -0
+fail2:
+     gpio_free(173);
+fail1:
+     gpio_free(172);
+fail0:
+     gpio_free(171);

This must be:

arch/arm/mach-omap2/board-omap3beagle.c +5 -0
+fail2:
+       gpio_free(172);
+fail1:
+       gpio_free(171);
+fail0:
Quoted 6 lines

Otherwise the set looks good to me.

--
Jarkko

Thanks Jarkko,

Yeah that one is obvious, will resubmit..

Regards,

Signature · 6 lines
Robert Nelson
http://www.rcn-ee.com/
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