diff mbox series

[02/10] brcmfmac: chip: Handle 1024-unit sizes for TCM blocks

Message ID 20230214092423.15175-2-marcan@marcan.st (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series BCM4387 / Apple M1 platform support | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Hector Martin Feb. 14, 2023, 9:24 a.m. UTC 
BCM4387 has trailing odd-sized blocks as part of TCM which have
their size described as a multiple of 1024 instead of 8192. Handle this
so we can compute the TCM size properly.

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>
---
 .../net/wireless/broadcom/brcm80211/brcmfmac/chip.c    | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
index a6239051404b..50e0c015cf43 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
@@ -212,8 +212,9 @@  struct sbsocramregs {
 #define	ARMCR4_TCBANB_MASK	0xf
 #define	ARMCR4_TCBANB_SHIFT	0
 
-#define	ARMCR4_BSZ_MASK		0x3f
+#define	ARMCR4_BSZ_MASK		0x7f
 #define	ARMCR4_BSZ_MULT		8192
+#define	ARMCR4_BLK_1K_MASK	0x200
 
 struct brcmf_core_priv {
 	struct brcmf_core pub;
@@ -684,6 +685,7 @@  static u32 brcmf_chip_tcm_ramsize(struct brcmf_core_priv *cr4)
 	u32 nbb;
 	u32 totb;
 	u32 bxinfo;
+	u32 blksize;
 	u32 idx;
 
 	corecap = brcmf_chip_core_read32(cr4, ARMCR4_CAP);
@@ -695,7 +697,11 @@  static u32 brcmf_chip_tcm_ramsize(struct brcmf_core_priv *cr4)
 	for (idx = 0; idx < totb; idx++) {
 		brcmf_chip_core_write32(cr4, ARMCR4_BANKIDX, idx);
 		bxinfo = brcmf_chip_core_read32(cr4, ARMCR4_BANKINFO);
-		memsize += ((bxinfo & ARMCR4_BSZ_MASK) + 1) * ARMCR4_BSZ_MULT;
+		blksize = ARMCR4_BSZ_MULT;
+		if (bxinfo & ARMCR4_BLK_1K_MASK)
+			blksize >>= 3;
+
+		memsize += ((bxinfo & ARMCR4_BSZ_MASK) + 1) * blksize;
 	}
 
 	return memsize;