[PATCH] ARM: dts: omap4-sdp: Make ethernet working even if booted with latest u-boot

[PATCH] ARM: dts: omap4-sdp: Make ethernet working even if booted with latest u-boot

[Peter Ujfalusi]

The ethernet works in kernel only if we use some binary u-boot from the
past which have support for KS8851.

The u-boot sources are not available for this mysterious u-boot image
people tends to hold on... Mainline u-bott does not have ethernet support
for sdp4430 and if we use that the ethernet is not working.

After some debugging I have managed to get the ethernet working with
mainline u-boot while not breaking the networking with the case when we
boot with the mysterious binary u-boot.

Basically we were missing bunch of pinmux settings and the 'magic'
gpio_138 handling in kernel.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
 arch/arm/boot/dts/omap4-sdp.dts | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm/boot/dts/omap4-sdp.dts b/arch/arm/boot/dts/omap4-sdp.dts
index 9dc7ec7655cb..c88817bdcc56 100644
--- a/arch/arm/boot/dts/omap4-sdp.dts
+++ b/arch/arm/boot/dts/omap4-sdp.dts
@@ -26,6 +26,9 @@
 	};
 
 	vdd_eth: fixedregulator-vdd-eth {
+		pinctrl-names = "default";
+		pinctrl-0 = <&enet_enable_gpio>;
+
 		compatible = "regulator-fixed";
 		regulator-name = "VDD_ETH";
 		regulator-min-microvolt = <3300000>;
@@ -352,6 +355,29 @@
 			OMAP4_IOPAD(0x152, PIN_INPUT_PULLUP | MUX_MODE0)	/* sdmmc5_dat3.sdmmc5_dat3 */
 		>;
 	};
+
+	/* gpio_48 for ENET_ENABLE */
+	enet_enable_gpio: pinmux_enet_enable_gpio {
+		pinctrl-single,pins = <
+			OMAP4_IOPAD(0x070, PIN_OUTPUT_PULLDOWN | MUX_MODE3)	/* gpmc_a24.gpio_48 */
+		>;
+	};
+
+	ks8851_pins: pinmux_ks8851_pins {
+		pinctrl-single,pins = <
+			/* ENET_INT */
+			OMAP4_IOPAD(0x054, PIN_INPUT_PULLUP | MUX_MODE3)	/* gpmc_ad10.gpio_34 */
+			/*
+			 * Misterious pin which makes the ethernet working
+			 * The legacy board file requested this pin on boot
+			 * (ETH_KS8851_QUART) and set it to high, similarly to
+			 * the ENET_ENABLE pin.
+			 * We could use gpio-hog to keep it high, but let's use
+			 * it as a reset GPIO for ks8851.
+			 */
+			OMAP4_IOPAD(0x13a, PIN_OUTPUT_PULLUP | MUX_MODE3)	/* mcspi1_cs1.gpio_138 */
+		>;
+	};
 };
 
 &i2c1 {
@@ -452,12 +478,16 @@
 	pinctrl-0 = <&mcspi1_pins>;
 
 	eth@0 {
+		pinctrl-names = "default";
+		pinctrl-0 = <&ks8851_pins>;
+
 		compatible = "ks8851";
 		spi-max-frequency = <24000000>;
 		reg = <0>;
 		interrupt-parent = <&gpio2>;
 		interrupts = <2 IRQ_TYPE_LEVEL_LOW>; /* gpio line 34 */
 		vdd-supply = <&vdd_eth>;
+		reset-gpios = <&gpio5 10 GPIO_ACTIVE_HIGH>;
 	};
 };
 
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki


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Re: [PATCH] ARM: dts: omap4-sdp: Make ethernet working even if booted with latest u-boot

[Tony Lindgren]

* Peter Ujfalusi <peter.ujfalusi@ti.com> [181213 13:57]:
> After some debugging I have managed to get the ethernet working with
> mainline u-boot while not breaking the networking with the case when we
> boot with the mysterious binary u-boot.

I'm pretty sure this is the most recent version of
WIP u-boot SPI support from Nishanth:

https://github.com/nmenon/u-boot/tree/v2014.04-mod/sdp4430-ethernet

From what I recall, that did not work for Blaze though
for enabling Ethernet for tftp booting but worked on
4430-sdp. Maybe because of the same issues as these
kernel patches though.

Regards,

Tony

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Re: [PATCH] ARM: dts: omap4-sdp: Make ethernet working even if booted with latest u-boot

[Russell King - ARM Linux]

On Thu, Dec 13, 2018 at 03:58:45PM +0200, Peter Ujfalusi wrote:
> The ethernet works in kernel only if we use some binary u-boot from the
> past which have support for KS8851.
> 
> The u-boot sources are not available for this mysterious u-boot image
> people tends to hold on... Mainline u-bott does not have ethernet support
> for sdp4430 and if we use that the ethernet is not working.
> 
> After some debugging I have managed to get the ethernet working with
> mainline u-boot while not breaking the networking with the case when we
> boot with the mysterious binary u-boot.
> 
> Basically we were missing bunch of pinmux settings and the 'magic'
> gpio_138 handling in kernel.
> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

Hi Peter,

Digging up where my u-boot came from, I found:

  https://plus.google.com/103895730806848715870/posts/cCq2CxDogW9

Unfortunately, gitorious no longer exists, but I do still have a clone
of that tree locally, containing:

9f384308319e OMAP4SDP: Add Micrel KS8851 net chip support
ae631b095a87 NET: Add driver for Micrel KS8851
78e43f2a8987 ARMV7: OMAP: Add spi driver for OMAP3/OMAP4
e576c6a9cbc9 omap4_common: config: remove I2C for SPL mode
19d5934c4b3b ARM: OMAP4: Move TEXT_BASE down to non-HS limit

plus some of my own modifications to fix the problems stated in that
post.

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
According to speedtest.net: 11.9Mbps down 500kbps up

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Re: [PATCH] ARM: dts: omap4-sdp: Make ethernet working even if booted with latest u-boot

[Peter Ujfalusi]

On 13/12/2018 17.17, Tony Lindgren wrote:
> * Peter Ujfalusi <peter.ujfalusi@ti.com> [181213 13:57]:
>> After some debugging I have managed to get the ethernet working with
>> mainline u-boot while not breaking the networking with the case when we
>> boot with the mysterious binary u-boot.
> 
> I'm pretty sure this is the most recent version of
> WIP u-boot SPI support from Nishanth:
> 
> https://github.com/nmenon/u-boot/tree/v2014.04-mod/sdp4430-ethernet

Cool, thanks!

It fails to compile so far with any of the toolchains I have tried so far :(

> From what I recall, that did not work for Blaze though
> for enabling Ethernet for tftp booting but worked on
> 4430-sdp. Maybe because of the same issues as these
> kernel patches though.

My Blaze is the 'big phone w/ two display' and not the tablet. Afaik it
is a shrink down version of sdp.

And the u-boot code still leaves open the questions regarding to pinmix
and gpio_138.

- Péter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

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Re: [PATCH] ARM: dts: omap4-sdp: Make ethernet working even if booted with latest u-boot

[Peter Ujfalusi]

On 13/12/2018 17.50, Russell King - ARM Linux wrote:
> On Thu, Dec 13, 2018 at 03:58:45PM +0200, Peter Ujfalusi wrote:
>> The ethernet works in kernel only if we use some binary u-boot from the
>> past which have support for KS8851.
>>
>> The u-boot sources are not available for this mysterious u-boot image
>> people tends to hold on... Mainline u-bott does not have ethernet support
>> for sdp4430 and if we use that the ethernet is not working.
>>
>> After some debugging I have managed to get the ethernet working with
>> mainline u-boot while not breaking the networking with the case when we
>> boot with the mysterious binary u-boot.
>>
>> Basically we were missing bunch of pinmux settings and the 'magic'
>> gpio_138 handling in kernel.
>>
>> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
> 
> Hi Peter,
> 
> Digging up where my u-boot came from, I found:
> 
>   https://plus.google.com/103895730806848715870/posts/cCq2CxDogW9
> 
> Unfortunately, gitorious no longer exists, but I do still have a clone
> of that tree locally, containing:
> 
> 9f384308319e OMAP4SDP: Add Micrel KS8851 net chip support
> ae631b095a87 NET: Add driver for Micrel KS8851
> 78e43f2a8987 ARMV7: OMAP: Add spi driver for OMAP3/OMAP4
> e576c6a9cbc9 omap4_common: config: remove I2C for SPL mode
> 19d5934c4b3b ARM: OMAP4: Move TEXT_BASE down to non-HS limit
> 
> plus some of my own modifications to fix the problems stated in that
> post.

I certainly have the version of u-boot which can do only one tftp load
(or dhcp request).

- Péter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

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Re: [PATCH] ARM: dts: omap4-sdp: Make ethernet working even if booted with latest u-boot

[Russell King - ARM Linux]

On Fri, Dec 14, 2018 at 03:08:09PM +0200, Peter Ujfalusi wrote:
> I certainly have the version of u-boot which can do only one tftp load
> (or dhcp request).

That'll be because of the buggy KS8851 driver.  This is the patch I
have on top of my 2014 version of Nishanth's tree.

diff --git a/drivers/net/ks8851.c b/drivers/net/ks8851.c
index 6467dde7ebf6..f888f43ad937 100644
--- a/drivers/net/ks8851.c
+++ b/drivers/net/ks8851.c
@@ -27,6 +27,27 @@
 
 #include "ks8851.h"
 #define KS8851_SNL		1
+#undef DEBUG
+
+static void dump_mem(const char *str, const void *base, unsigned orig, unsigned len)
+{
+#ifdef DEBUG
+	const unsigned char *p = base;
+	unsigned i, j;
+
+	printf("%s:", str);
+	
+	for (j = 0; j < len; j += 32) {
+		printf("\n%04x:", j);
+		for (i = j; i < j + 32 && i < len; i++)
+			printf("%s%s%02x",
+				(i == j + 16) ? " " : "",
+				i == orig ? "|" : " ",
+				p[i]);
+	}
+	printf("\n");
+#endif
+}
 
 /*
  * GET_KS8851SNL_RWWORD_CMD
@@ -324,6 +345,7 @@ void KS8851SNL_READ_BUFFER(void *pHardware,
 		pdw++;
 		*puReadLen = (u16)((*pdw) >> 16);
 		*ppOut = pIn + 8;
+dump_mem("RX", pMove, spiBurstLen + 8, spiBurstLen + 8);
 	}
 
 	if (spiBurstFlag != SPI_READ_BURST_ALL) {
@@ -626,6 +648,7 @@ static int ks8851_eth_recv(struct eth_device *dev)
 			printf("frame count = %d\n", rxFrameCount);
 #endif
 
+			pHardware->m_uCurFrameIndex = 0;
 			pHardware->m_uFramesRemained = rxFrameCount;
 
 			if (rxFrameCount == 0)
@@ -697,7 +720,7 @@ static int ks8851_eth_send(struct eth_device *dev,
 	uiPacketLength = length;
 	GET_DATA_ALIGNMENT(length, &uiPacketLength);
 	HW_WRITE_START(pHardware);
-
+dump_mem("TX", packet, length, uiPacketLength);
 #ifdef KS8851_SNL
 	KS8851SNL_DATA_WRITE((u8 *)packet, length, uiPacketLength, &fReturn);
 #else
@@ -722,12 +745,19 @@ static int ks8851_eth_send(struct eth_device *dev,
 	return 1;
 }
 
+static int ks8851_eth_init2(struct eth_device *dev, bd_t *bd)
+{
+	return 0;
+}
+
 static int ks8851_eth_init(struct eth_device *dev, bd_t *bd)
 {
 
 	u16 txCntl, rxCntl, w, intMask;
 	PHARDWARE pHardware = &gHardware;
 
+	dev->init = ks8851_eth_init2;
+
 	pHardware->m_uCurFrameIndex = 0;
 	pHardware->m_uFramesRemained = 0;
 	pHardware->m_uCurRecvFrams = MAX_RECV_FRAMES;
diff --git a/include/configs/omap4_sdp4430.h b/include/configs/omap4_sdp4430.h
index 0d9c16ea9f04..ae94dd852f3d 100644
--- a/include/configs/omap4_sdp4430.h
+++ b/include/configs/omap4_sdp4430.h
@@ -21,6 +21,9 @@
 
 #include <configs/omap4_common.h>
 
+#undef CONFIG_SYS_PROMPT
+#define CONFIG_SYS_PROMPT             "OMAP44XX SDP # "
+
 #ifndef CONFIG_SPL_BUILD
 /* Battery Charger */
 #define CONFIG_CMD_BAT			1


-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
According to speedtest.net: 11.9Mbps down 500kbps up

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Re: [PATCH] ARM: dts: omap4-sdp: Make ethernet working even if booted with latest u-boot

[Peter Ujfalusi]

On 14/12/2018 15.16, Russell King - ARM Linux wrote:
> On Fri, Dec 14, 2018 at 03:08:09PM +0200, Peter Ujfalusi wrote:
>> I certainly have the version of u-boot which can do only one tftp load
>> (or dhcp request).
> 
> That'll be because of the buggy KS8851 driver.  This is the patch I
> have on top of my 2014 version of Nishanth's tree.

Thanks!

Can you test the patch to see if it is not breaking things?
I believe the patch is correct as we clearly missing pinmux
configuration from the DT for pins.

> 
> diff --git a/drivers/net/ks8851.c b/drivers/net/ks8851.c
> index 6467dde7ebf6..f888f43ad937 100644
> --- a/drivers/net/ks8851.c
> +++ b/drivers/net/ks8851.c
> @@ -27,6 +27,27 @@
>  
>  #include "ks8851.h"
>  #define KS8851_SNL		1
> +#undef DEBUG
> +
> +static void dump_mem(const char *str, const void *base, unsigned orig, unsigned len)
> +{
> +#ifdef DEBUG
> +	const unsigned char *p = base;
> +	unsigned i, j;
> +
> +	printf("%s:", str);
> +	
> +	for (j = 0; j < len; j += 32) {
> +		printf("\n%04x:", j);
> +		for (i = j; i < j + 32 && i < len; i++)
> +			printf("%s%s%02x",
> +				(i == j + 16) ? " " : "",
> +				i == orig ? "|" : " ",
> +				p[i]);
> +	}
> +	printf("\n");
> +#endif
> +}
>  
>  /*
>   * GET_KS8851SNL_RWWORD_CMD
> @@ -324,6 +345,7 @@ void KS8851SNL_READ_BUFFER(void *pHardware,
>  		pdw++;
>  		*puReadLen = (u16)((*pdw) >> 16);
>  		*ppOut = pIn + 8;
> +dump_mem("RX", pMove, spiBurstLen + 8, spiBurstLen + 8);
>  	}
>  
>  	if (spiBurstFlag != SPI_READ_BURST_ALL) {
> @@ -626,6 +648,7 @@ static int ks8851_eth_recv(struct eth_device *dev)
>  			printf("frame count = %d\n", rxFrameCount);
>  #endif
>  
> +			pHardware->m_uCurFrameIndex = 0;
>  			pHardware->m_uFramesRemained = rxFrameCount;
>  
>  			if (rxFrameCount == 0)
> @@ -697,7 +720,7 @@ static int ks8851_eth_send(struct eth_device *dev,
>  	uiPacketLength = length;
>  	GET_DATA_ALIGNMENT(length, &uiPacketLength);
>  	HW_WRITE_START(pHardware);
> -
> +dump_mem("TX", packet, length, uiPacketLength);
>  #ifdef KS8851_SNL
>  	KS8851SNL_DATA_WRITE((u8 *)packet, length, uiPacketLength, &fReturn);
>  #else
> @@ -722,12 +745,19 @@ static int ks8851_eth_send(struct eth_device *dev,
>  	return 1;
>  }
>  
> +static int ks8851_eth_init2(struct eth_device *dev, bd_t *bd)
> +{
> +	return 0;
> +}
> +
>  static int ks8851_eth_init(struct eth_device *dev, bd_t *bd)
>  {
>  
>  	u16 txCntl, rxCntl, w, intMask;
>  	PHARDWARE pHardware = &gHardware;
>  
> +	dev->init = ks8851_eth_init2;
> +
>  	pHardware->m_uCurFrameIndex = 0;
>  	pHardware->m_uFramesRemained = 0;
>  	pHardware->m_uCurRecvFrams = MAX_RECV_FRAMES;
> diff --git a/include/configs/omap4_sdp4430.h b/include/configs/omap4_sdp4430.h
> index 0d9c16ea9f04..ae94dd852f3d 100644
> --- a/include/configs/omap4_sdp4430.h
> +++ b/include/configs/omap4_sdp4430.h
> @@ -21,6 +21,9 @@
>  
>  #include <configs/omap4_common.h>
>  
> +#undef CONFIG_SYS_PROMPT
> +#define CONFIG_SYS_PROMPT             "OMAP44XX SDP # "
> +
>  #ifndef CONFIG_SPL_BUILD
>  /* Battery Charger */
>  #define CONFIG_CMD_BAT			1
> 
> 

- Péter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

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Re: [PATCH] ARM: dts: omap4-sdp: Make ethernet working even if booted with latest u-boot

[Tony Lindgren]

* Peter Ujfalusi <peter.ujfalusi@ti.com> [181213 05:57]:
> The ethernet works in kernel only if we use some binary u-boot from the
> past which have support for KS8851.
> 
> The u-boot sources are not available for this mysterious u-boot image
> people tends to hold on... Mainline u-bott does not have ethernet support
> for sdp4430 and if we use that the ethernet is not working.
> 
> After some debugging I have managed to get the ethernet working with
> mainline u-boot while not breaking the networking with the case when we
> boot with the mysterious binary u-boot.
> 
> Basically we were missing bunch of pinmux settings and the 'magic'
> gpio_138 handling in kernel.

Applying into omap-for-v5.1/dt thanks.

Tony

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