[PATCH 4/6] b43: add IPA TX gain table for N-PHY r8 + radio 2057 r8

[Alessio Ferri <alessio.ferri@mythread.it>]

Add the 2.4 GHz IPA TX gain table for N-PHY rev 8 paired with radio
2057 rev 8 and wire it to the existing dispatcher.

b43_nphy_get_ipa_gain_table() in tables_nphy.c currently handles
case 8 only for radio_rev == 5; radio_rev == 8 falls through and
the function logs:

    b43-phyX ERROR: No 2GHz IPA gain table available for this device
    b43-phyX ERROR: PHY init: Channel switch to default failed

leaving b43_phy_init() to return an error and core_init to abort
before the MAC is enabled.

The new b43_ntab_tx_gain_ipa_2057_rev8_2g[] is 128 u32 entries,
matching the layout of the existing b43_ntab_tx_gain_ipa_2057_
rev5_2g and b43_ntab_tx_gain_ipa_2057_rev9_2g siblings in this
file. Each entry packs five gain fields decoded by
wlc_phy_get_tx_gain_nphy in the proprietary driver, the same
encoding b43 uses for the other 2057 IPA tables.

The high byte of every entry differs from the rev 5 sibling (0x40
vs 0x30): different PAD-gain code prefix for the rev 8 front-end.
The low 24 bits coincide with rev 5 across the whole table - the
gain step amplitudes are the same, only the PAD-gain selector
prefix changes.

Values extracted from an MMIO dump of the proprietary Broadcom wl
driver running on BCM6362 silicon (wl driver 6.30.102.7).
Encoding cross-validated by re-deriving the in-tree rev 5 table
from the same source using the same extraction method - the
result matches b43_ntab_tx_gain_ipa_2057_rev5_2g byte-for-byte.

Signed-off-by: Alessio Ferri <alessio.ferri@mythread.it>
---
 .../net/wireless/broadcom/b43/tables_nphy.c   | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/drivers/net/wireless/broadcom/b43/tables_nphy.c b/drivers/net/wireless/broadcom/b43/tables_nphy.c
index 41a25d909..84e8d718d 100644
--- a/drivers/net/wireless/broadcom/b43/tables_nphy.c
+++ b/drivers/net/wireless/broadcom/b43/tables_nphy.c
@@ -2715,6 +2715,43 @@ static const u32 b43_ntab_tx_gain_ipa_2057_rev5_2g[] = {
 	0x300f0715, 0x300f0715, 0x300f0715, 0x300f0715,
 };
 
+/* Extracted from MMIO dump of 6.30.102.7 */
+static const u32 b43_ntab_tx_gain_ipa_2057_rev8_2g[] = {
+	0x40ff0031, 0x40e70031, 0x40e7002e, 0x40cf002e,
+	0x40bf002e, 0x40af002e, 0x409f002f, 0x407f0033,
+	0x407f0031, 0x407f002e, 0x4077002e, 0x406f002e,
+	0x4067002e, 0x405f002f, 0x40570030, 0x4057002d,
+	0x404f002e, 0x40470031, 0x4047002e, 0x4047002c,
+	0x40470029, 0x403f002c, 0x403f0029, 0x4037002d,
+	0x4037002a, 0x40370028, 0x402f002c, 0x402f002a,
+	0x402f0028, 0x402f0026, 0x4027002c, 0x40270029,
+	0x40270027, 0x40270025, 0x40270023, 0x401f002c,
+	0x401f002a, 0x401f0028, 0x401f0025, 0x401f0024,
+	0x401f0022, 0x401f001f, 0x4017002d, 0x4017002b,
+	0x40170028, 0x40170026, 0x40170024, 0x40170022,
+	0x40170020, 0x4017001e, 0x4017001d, 0x4017001b,
+	0x4017001a, 0x40170018, 0x40170017, 0x40170015,
+	0x400f002c, 0x400f0029, 0x400f0027, 0x400f0024,
+	0x400f0022, 0x400f0021, 0x400f001f, 0x400f001d,
+	0x400f001b, 0x400f001a, 0x400f0018, 0x400f0017,
+	0x400f0016, 0x400f0015, 0x400f0115, 0x400f0215,
+	0x400f0315, 0x400f0415, 0x400f0515, 0x400f0615,
+	0x400f0715, 0x400f0715, 0x400f0715, 0x400f0715,
+	0x400f0715, 0x400f0715, 0x400f0715, 0x400f0715,
+	0x400f0715, 0x400f0715, 0x400f0715, 0x400f0715,
+	0x400f0715, 0x400f0715, 0x400f0715, 0x400f0715,
+	0x400f0715, 0x400f0715, 0x400f0715, 0x400f0715,
+	0x400f0715, 0x400f0715, 0x400f0715, 0x400f0715,
+	0x400f0715, 0x400f0715, 0x400f0715, 0x400f0715,
+	0x400f0715, 0x400f0715, 0x400f0715, 0x400f0715,
+	0x400f0715, 0x400f0715, 0x400f0715, 0x400f0715,
+	0x400f0715, 0x400f0715, 0x400f0715, 0x400f0715,
+	0x400f0715, 0x400f0715, 0x400f0715, 0x400f0715,
+	0x400f0715, 0x400f0715, 0x400f0715, 0x400f0715,
+	0x400f0715, 0x400f0715, 0x400f0715, 0x400f0715,
+};
+
+
 /* Extracted from MMIO dump of 6.30.223.141 */
 static const u32 b43_ntab_tx_gain_ipa_2057_rev9_2g[] = {
 	0x60ff0031, 0x60e7002c, 0x60cf002a, 0x60c70029,
@@ -3651,6 +3688,8 @@ static const u32 *b43_nphy_get_ipa_gain_table(struct b43_wldev *dev)
 		case 8:
 			if (phy->radio_rev == 5)
 				return b43_ntab_tx_gain_ipa_2057_rev5_2g;
+			if (phy->radio_rev == 8)
+				return b43_ntab_tx_gain_ipa_2057_rev8_2g;
 			break;
 		case 6:
 			if (dev->dev->chip_id == BCMA_CHIP_ID_BCM47162)
-- 
2.43.0