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usb: gadget: UMS: support multiple sector sizes

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UFS storage often uses a 4096-byte sector size, add support for dynamic
sector sizes based loosely on the Linux implementation.

Support for dynamic sector sizes changes the types used in some
divisions, resulting in the compiler attempting to use
libgcc helpers (__aeabi_ldivmod).
Replace these divisions with calls to lldiv() to handle this correctly.

Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
Link: https://lore.kernel.org/r/20240320-b4-qcom-usb-v4-4-41be480172e1@linaro.org
[mkorpershoek: squashed the lldiv() fix from caleb]
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
This commit is contained in:
Caleb Connolly
2024-03-20 14:30:50 +00:00
committed by Mattijs Korpershoek
parent 341a172ef7
commit 304fa0aa44
4 changed files with 66 additions and 53 deletions
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4
cmd/usb_mass_storage.c
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@@ -88,10 +88,6 @@ static int ums_init(const char *devtype, const char *devnums_part_str)
if (!strchr(devnum_part_str, ':'))
partnum = 0;
/* f_mass_storage.c assumes SECTOR_SIZE sectors */
if (block_dev->blksz != SECTOR_SIZE)
goto cleanup;
ums_new = realloc(ums, (ums_count + 1) * sizeof(*ums));
if (!ums_new)
goto cleanup;