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86 lines
3.4 KiB
Diff
86 lines
3.4 KiB
Diff
From d55a52ccf8f80cdf51af2c5c6e56c825f98c4f85 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
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Date: Thu, 2 Apr 2015 09:13:49 +0200
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Subject: [PATCH] MIPS: BCM47xx: Add generic function filling SPROM entries
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Handling many SPROM revisions became messy, we have tons of functions
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specific to various revision groups which are quite hard to track.
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For years there is yet another revision 11 asking for support, but
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adding it in current the form would make things even worse.
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To resolve this problem let's add new function with table-like entries
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that will contain revision bitmask for every SPROM variable.
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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
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Cc: linux-mips@linux-mips.org
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Cc: Hauke Mehrtens <hauke@hauke-m.de>
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Cc: Jonas Gorski <jonas.gorski@gmail.com>
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Patchwork: https://patchwork.linux-mips.org/patch/9659/
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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---
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arch/mips/bcm47xx/sprom.c | 32 +++++++++++++++++++++++++++++---
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1 file changed, 29 insertions(+), 3 deletions(-)
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diff --git a/arch/mips/bcm47xx/sprom.c b/arch/mips/bcm47xx/sprom.c
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index 5d32afc..77790c9 100644
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--- a/arch/mips/bcm47xx/sprom.c
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+++ b/arch/mips/bcm47xx/sprom.c
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@@ -180,6 +180,33 @@ static void nvram_read_alpha2(const char *prefix, const char *name,
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memcpy(val, buf, 2);
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}
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+/* This is one-function-only macro, it uses local "sprom" variable! */
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+#define ENTRY(_revmask, _type, _prefix, _name, _val, _allset, _fallback) \
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+ if (_revmask & BIT(sprom->revision)) \
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+ nvram_read_ ## _type(_prefix, NULL, _name, &sprom->_val, \
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+ _allset, _fallback)
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+/*
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+ * Special version of filling function that can be safely called for any SPROM
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+ * revision. For every NVRAM to SPROM mapping it contains bitmask of revisions
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+ * for which the mapping is valid.
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+ * It obviously requires some hexadecimal/bitmasks knowledge, but allows
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+ * writing cleaner code (easy revisions handling).
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+ * Note that while SPROM revision 0 was never used, we still keep BIT(0)
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+ * reserved for it, just to keep numbering sane.
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+ */
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+static void bcm47xx_sprom_fill_auto(struct ssb_sprom *sprom,
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+ const char *prefix, bool fallback)
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+{
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+ const char *pre = prefix;
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+ bool fb = fallback;
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+
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+ ENTRY(0xfffffffe, u16, pre, "boardrev", board_rev, 0, true);
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+ ENTRY(0xfffffffe, u16, pre, "boardnum", board_num, 0, fb);
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+
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+ /* TODO: Move more mappings here */
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+}
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+#undef ENTRY /* It's specififc, uses local variable, don't use it (again). */
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+
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static void bcm47xx_fill_sprom_r1234589(struct ssb_sprom *sprom,
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const char *prefix, bool fallback)
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{
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@@ -714,9 +741,6 @@ static void bcm47xx_fill_sprom_ethernet(struct ssb_sprom *sprom,
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static void bcm47xx_fill_board_data(struct ssb_sprom *sprom, const char *prefix,
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bool fallback)
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{
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- nvram_read_u16(prefix, NULL, "boardrev", &sprom->board_rev, 0, true);
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- nvram_read_u16(prefix, NULL, "boardnum", &sprom->board_num, 0,
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- fallback);
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nvram_read_u16(prefix, NULL, "boardtype", &sprom->board_type, 0, true);
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nvram_read_u32_2(prefix, "boardflags", &sprom->boardflags_lo,
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&sprom->boardflags_hi, fallback);
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@@ -787,6 +811,8 @@ void bcm47xx_fill_sprom(struct ssb_sprom *sprom, const char *prefix,
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bcm47xx_fill_sprom_r12389(sprom, prefix, fallback);
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bcm47xx_fill_sprom_r1(sprom, prefix, fallback);
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}
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+
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+ bcm47xx_sprom_fill_auto(sprom, prefix, fallback);
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}
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#ifdef CONFIG_BCM47XX_SSB
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--
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1.8.4.5
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