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wifi: brcmfmac: chip: Only disable D11 cores; handle an arbitrary number

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At least on BCM4387, the D11 cores are held in reset on cold startup and
firmware expects to release reset itself. Just assert reset here and let
firmware deassert it. Premature deassertion results in the firmware
failing to initialize properly some of the time, with strange AXI bus
errors.

Also, BCM4387 has 3 cores, up from 2. The logic for handling that is in
brcmf_chip_ai_resetcore(), but since we aren't using that any more, just
handle it here.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230214092423.15175-1-marcan@marcan.st
This commit is contained in:
Hector Martin 2023-02-14 18:24:14 +09:00 committed by Kalle Valo
parent ec52d77d07
commit 3c7c07ca7a
1 changed files with 8 additions and 5 deletions
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13
drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
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@ -1292,15 +1292,18 @@ static bool brcmf_chip_cm3_set_active(struct brcmf_chip_priv *chip)
static inline void
brcmf_chip_cr4_set_passive(struct brcmf_chip_priv *chip)
{
int i;
struct brcmf_core *core;
brcmf_chip_disable_arm(chip, BCMA_CORE_ARM_CR4);
core = brcmf_chip_get_core(&chip->pub, BCMA_CORE_80211);
brcmf_chip_resetcore(core, D11_BCMA_IOCTL_PHYRESET |
D11_BCMA_IOCTL_PHYCLOCKEN,
D11_BCMA_IOCTL_PHYCLOCKEN,
D11_BCMA_IOCTL_PHYCLOCKEN);
/* Disable the cores only and let the firmware enable them.
* Releasing reset ourselves breaks BCM4387 in weird ways.
*/
for (i = 0; (core = brcmf_chip_get_d11core(&chip->pub, i)); i++)
brcmf_chip_coredisable(core, D11_BCMA_IOCTL_PHYRESET |
D11_BCMA_IOCTL_PHYCLOCKEN,
D11_BCMA_IOCTL_PHYCLOCKEN);
}
static bool brcmf_chip_cr4_set_active(struct brcmf_chip_priv *chip, u32 rstvec)