From: Sean Anderson <sean.anderson@seco.com>
To: Andre Przywara <andre.przywara@arm.com>,
Simon Glass <sjg@chromium.org>,
Jagan Teki <jagan@amarulasolutions.com>
Cc: u-boot@lists.denx.de, linux-sunxi@lists.linux.dev,
Patrick Delaunay <patrick.delaunay@foss.st.com>,
Heiko Schocher <hs@denx.de>,
Kever Yang <kever.yang@rock-chips.com>,
Philipp Tomsich <philipp.tomsich@vrull.eu>
Subject: Re: [RFC PATCH 2/3] sunxi: Implement fastboot_get_mmc_device()
Date: Mon, 24 May 2021 10:33:58 -0400 [thread overview]
Message-ID: <c4cd77a4-5e61-d2a4-15e3-164024e0051f@seco.com> (raw)
In-Reply-To: <20210524003650.24469-3-andre.przywara@arm.com>
On 5/23/21 8:36 PM, Andre Przywara wrote:
> The default MMC device to use for the fastboot flash command is hard to
> decide at runtime, since the numbering of the MMC devices depends on
> devicetree nodes. On the hardware side, the eMMC is connected to device
> 2, but this might be U-Boot's device 1 or 2, depending on whether the DT
> contains a WiFi node for the hardware MMC1 device.
Can you fix this with aliases? e.g.
aliases {
mmc0 = &mmc0;
mmc1 = &mmc1;
mmc2 = &mmc2;
};
That way the mmcs will always have the same number even if (e.g.) hardware mmc 1 is absent.
--Sean
>
> To avoid hardcoding this for each board, let's scan all MMC devices, and
> try to find the eMMC device, given that this is enabled. If not, we use
> the SD card.
>
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
> ---
> board/sunxi/board.c | 37 +++++++++++++++++++++++++++++++++++++
> 1 file changed, 37 insertions(+)
>
> diff --git a/board/sunxi/board.c b/board/sunxi/board.c
> index 21651a1bfca..5f64887e48b 100644
> --- a/board/sunxi/board.c
> +++ b/board/sunxi/board.c
> @@ -625,6 +625,43 @@ int board_mmc_init(struct bd_info *bis)
> }
> #endif
>
> +#ifdef CONFIG_FASTBOOT_FLASH_MMC
> +int fastboot_get_mmc_device(void)
> +{
> + struct udevice *dev;
> + static int mmc_dev = -1;
> + int sd_card = -1;
> +
> + if (mmc_dev != -1)
> + return mmc_dev;
> +
> + for (uclass_first_device(UCLASS_MMC, &dev);
> + dev;
> + uclass_next_device(&dev)) {
> + struct mmc *mmc = mmc_get_mmc_dev(dev);
> +
> + mmc_init(mmc);
> + if (!mmc->has_init)
> + continue;
> +
> + if (IS_SD(mmc)) {
> + sd_card = dev->seq_;
> + continue;
> + } else {
> + mmc_dev = dev->seq_;
> + break;
> + }
> + }
> +
> + if (mmc_dev == -1)
> + mmc_dev = sd_card;
> + if (mmc_dev == -1)
> + mmc_dev = 0;
> +
> + return mmc_dev;
> +}
> +#endif
> +
> #ifdef CONFIG_SPL_BUILD
>
> static void sunxi_spl_store_dram_size(phys_addr_t dram_size)
>
next prev parent reply other threads:[~2021-05-24 14:34 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-24 0:36 [RFC PATCH 0/3] fastboot: sunxi: Determine MMC device at runtime Andre Przywara
2021-05-24 0:36 ` [RFC PATCH 1/3] fastboot: Allow runtime determination of MMC device Andre Przywara
2021-05-27 13:44 ` Simon Glass
2021-05-24 0:36 ` [RFC PATCH 2/3] sunxi: Implement fastboot_get_mmc_device() Andre Przywara
2021-05-24 14:33 ` Sean Anderson [this message]
2021-05-24 14:57 ` Andre Przywara
2021-05-24 0:36 ` [RFC PATCH 3/3] sunxi: Drop sunxi FASTBOOT_FLASH_MMC_DEV defaults Andre Przywara
2021-05-24 14:37 ` [RFC PATCH 0/3] fastboot: sunxi: Determine MMC device at runtime Sean Anderson
2021-05-24 15:15 ` Andre Przywara
2021-05-24 15:33 ` Sean Anderson
2021-05-24 15:28 ` Maxime Ripard
2021-05-24 15:43 ` Sean Anderson
2021-06-07 15:14 ` Maxime Ripard
2021-06-07 15:21 ` Sean Anderson
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