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Subject: Re: brcmfmac support for BCM4359 sdio on arm64
To:     Christian Hewitt <christianshewitt@gmail.com>,
        arend.vanspriel@broadcom.com
Cc:     linux-wireless@vger.kernel.org,
        brcm80211-dev-list.pdl@broadcom.com,
        brcm80211-dev-list@cypress.com, Wright.Feng@cypress.com,
        Christoph Muellner <christoph.muellner@theobroma-systems.com>
References: <9B1E511E-A6F7-4907-953B-537EC7F75EEE@gmail.com>
From:   Neil Armstrong <narmstrong@baylibre.com>
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Organization: Baylibre
Message-ID: <6381bf98-ea67-4bcf-8f36-8b6d29076eee@baylibre.com>
Date:   Tue, 28 May 2019 09:28:27 +0200
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Sender: linux-wireless-owner@vger.kernel.org
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Hi,

On 28/05/2019 09:19, Christian Hewitt wrote:
> Hello Arend,
> 
> Last October Christoph Müllner reported BCM4359 SDIO issues here: https://www.spinics.net/lists/linux-wireless/msg178783.html but the investigation stalled after the needs/timescale of his project forced a change to an alternate (working) module.

Following Mullner's thread, this is what I collected with various fixes found on other repos :
===========><===================================================
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
index d2f788d88668..aa434b787953 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -971,6 +971,7 @@ static const struct sdio_device_id brcmf_sdmmc_ids[] = {
 	BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43455),
 	BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4354),
 	BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4356),
+	BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4359),
 	BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_CYPRESS_4373),
 	{ /* end: all zeroes */ }
 };
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
index 927d62b3d41b..21e947fb1537 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
@@ -681,7 +681,6 @@ static u32 brcmf_chip_tcm_rambase(struct brcmf_chip_priv *ci)
 	case BRCM_CC_43569_CHIP_ID:
 	case BRCM_CC_43570_CHIP_ID:
 	case BRCM_CC_4358_CHIP_ID:
-	case BRCM_CC_4359_CHIP_ID:
 	case BRCM_CC_43602_CHIP_ID:
 	case BRCM_CC_4371_CHIP_ID:
 		return 0x180000;
@@ -691,6 +690,7 @@ static u32 brcmf_chip_tcm_rambase(struct brcmf_chip_priv *ci)
 	case BRCM_CC_4366_CHIP_ID:
 	case BRCM_CC_43664_CHIP_ID:
 		return 0x200000;
+	case BRCM_CC_4359_CHIP_ID:
 	case CY_CC_4373_CHIP_ID:
 		return 0x160000;
 	default:
@@ -1339,6 +1339,7 @@ bool brcmf_chip_sr_capable(struct brcmf_chip *pub)
 	switch (pub->chip) {
 	case BRCM_CC_4354_CHIP_ID:
 	case BRCM_CC_4356_CHIP_ID:
+	case BRCM_CC_4359_CHIP_ID:
 	case BRCM_CC_4345_CHIP_ID:
 		/* explicitly check SR engine enable bit */
 		pmu_cc3_mask = BIT(2);
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
index a907d7b065fa..cf90a87bda60 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
@@ -617,6 +617,7 @@ BRCMF_FW_DEF(43430A1, "brcmfmac43430-sdio");
 BRCMF_FW_DEF(43455, "brcmfmac43455-sdio");
 BRCMF_FW_DEF(4354, "brcmfmac4354-sdio");
 BRCMF_FW_DEF(4356, "brcmfmac4356-sdio");
+BRCMF_FW_DEF(4359, "brcmfmac4359-sdio");
 BRCMF_FW_DEF(4373, "brcmfmac4373-sdio");

 static const struct brcmf_firmware_mapping brcmf_sdio_fwnames[] = {
@@ -637,6 +638,7 @@ static const struct brcmf_firmware_mapping brcmf_sdio_fwnames[] = {
 	BRCMF_FW_ENTRY(BRCM_CC_4345_CHIP_ID, 0xFFFFFFC0, 43455),
 	BRCMF_FW_ENTRY(BRCM_CC_4354_CHIP_ID, 0xFFFFFFFF, 4354),
 	BRCMF_FW_ENTRY(BRCM_CC_4356_CHIP_ID, 0xFFFFFFFF, 4356),
+	BRCMF_FW_ENTRY(BRCM_CC_4359_CHIP_ID, 0xFFFFFFFF, 4359),
 	BRCMF_FW_ENTRY(CY_CC_4373_CHIP_ID, 0xFFFFFFFF, 4373)
 };

diff --git a/include/linux/mmc/sdio_ids.h b/include/linux/mmc/sdio_ids.h
index 4224902a8e22..00e3f624baf2 100644
--- a/include/linux/mmc/sdio_ids.h
+++ b/include/linux/mmc/sdio_ids.h
@@ -41,6 +41,7 @@
 #define SDIO_DEVICE_ID_BROADCOM_43455		0xa9bf
 #define SDIO_DEVICE_ID_BROADCOM_4354		0x4354
 #define SDIO_DEVICE_ID_BROADCOM_4356		0x4356
+#define SDIO_DEVICE_ID_BROADCOM_4359		0x4359
 #define SDIO_DEVICE_ID_CYPRESS_4373		0x4373

 #define SDIO_VENDOR_ID_INTEL			0x0089
===========><===================================================

But the driver stalls, without any errors.
I haven't activated debug traces in the brcmfmac driver to investigate further.

Neil

> 
> BCM4359 is also being used in an increasing number of Amlogic devices the Kodi focussed distro LibreELEC supports. I’m one of the maintainers for the distro and I’d like to assist/resume the investigation.
> 
> To recap: using changes from Wright Feng that can be found here https://github.com/RobertCNelson/ti-linux-kernel-dev/blob/65f17112e1c883d3c9f3fa68837e5f9b5eb7cfad/patches/cypress/v4.14.52-2018_0928/cypress-patch/0050-brcmfmac-Add-support-for-BCM4359-SDIO-chipset.patch results in the BCM4359 device being identified but firmware loading fails:
> 
> [    8.557929] brcmfmac: F1 signature read @0x18000000=0x17294359
> [    8.562087] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac4359-sdio for chip BCM4359/9
> [    8.775655] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed
> [    8.775667] brcmfmac: brcmf_sdio_verifymemory: error -84 on reading 2048 membytes at 0x0025f0c0
> [    8.775670] brcmfmac: brcmf_sdio_download_firmware: dongle nvram file download failed
> 
> See: http://ix.io/1KfY for the full dmesg output on 5.1-rc1 kernel including a splat that may or may not be related/relevant. I am using the firmware and nvram files from https://github.com/LibreELEC/brcmfmac_sdio-firmware which match files found in several other github and public repo locations. The firmware/nvram are reported working in Android. 
> 
> BCMDHD is also reported working with the last few commits here: https://gitlab.com/baylibre/amlogic/atv/linux/commits/narmstrong/v5.1/aml/integ-5.1-bcmdhd but LibreELEC needs to support many different boards (with many different SDIO modules) from a single OS image, so BCMDHD is not the solution we need.
> 
> One additional patch I spotted mentioning BCM4359 (also from Wright Feng) was https://github.com/RobertCNelson/ti-linux-kernel-dev/blob/65f17112e1c883d3c9f3fa68837e5f9b5eb7cfad/patches/cypress/v4.14.52-2018_0928/cypress-patch/0073-non-upstream-reset-two-D11-cores-if-chip-has-two-D11.patch but it makes no difference (the dmesg log above is with this patch applied).
> 
> I’m happy building test kernels but I don’t write code so I can be fed patches and can provide logs/output as long as the instructions are fairly explicit. I’ve also CC’d LibreELEC colleague and linux-amlogic maintainer Neil Armstrong who has vastly superior skills to myself and can assist. NB: If direct access to hardware would help progress things I can easily organise remote access or get board samples shipped.
> 
> How to resume things again?
> 
> Christian
>