From bb76563214ec371a461ca5038904a5b93dbd6b46 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Wed, 26 Dec 2012 08:29:17 +0000 Subject: [PATCH] MIPS: bcm47xx: separate functions finding flash window addr MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Also check if parallel flash is present at all before accessing it and add support for serial flash on BCMA bus. Signed-off-by: Rafał Miłecki Acked-by: Hauke Mehrtens Patchwork: http://patchwork.linux-mips.org/patch/4738/ Signed-off-by: John Crispin --- arch/mips/bcm47xx/nvram.c | 87 ++++++++++++++++++++++++++++++++--------------- 1 file changed, 60 insertions(+), 27 deletions(-) diff --git a/arch/mips/bcm47xx/nvram.c b/arch/mips/bcm47xx/nvram.c index 48a4c70..6461367 100644 --- a/arch/mips/bcm47xx/nvram.c +++ b/arch/mips/bcm47xx/nvram.c @@ -23,39 +23,13 @@ static char nvram_buf[NVRAM_SPACE]; -/* Probe for NVRAM header */ -static void early_nvram_init(void) +static void nvram_find_and_copy(u32 base, u32 lim) { -#ifdef CONFIG_BCM47XX_SSB - struct ssb_mipscore *mcore_ssb; -#endif -#ifdef CONFIG_BCM47XX_BCMA - struct bcma_drv_cc *bcma_cc; -#endif struct nvram_header *header; int i; - u32 base = 0; - u32 lim = 0; u32 off; u32 *src, *dst; - switch (bcm47xx_bus_type) { -#ifdef CONFIG_BCM47XX_SSB - case BCM47XX_BUS_TYPE_SSB: - mcore_ssb = &bcm47xx_bus.ssb.mipscore; - base = mcore_ssb->pflash.window; - lim = mcore_ssb->pflash.window_size; - break; -#endif -#ifdef CONFIG_BCM47XX_BCMA - case BCM47XX_BUS_TYPE_BCMA: - bcma_cc = &bcm47xx_bus.bcma.bus.drv_cc; - base = bcma_cc->pflash.window; - lim = bcma_cc->pflash.window_size; - break; -#endif - } - off = FLASH_MIN; while (off <= lim) { /* Windowed flash access */ @@ -86,6 +60,65 @@ found: *dst++ = le32_to_cpu(*src++); } +#ifdef CONFIG_BCM47XX_SSB +static void nvram_init_ssb(void) +{ + struct ssb_mipscore *mcore = &bcm47xx_bus.ssb.mipscore; + u32 base; + u32 lim; + + if (mcore->pflash.present) { + base = mcore->pflash.window; + lim = mcore->pflash.window_size; + } else { + pr_err("Couldn't find supported flash memory\n"); + return; + } + + nvram_find_and_copy(base, lim); +} +#endif + +#ifdef CONFIG_BCM47XX_BCMA +static void nvram_init_bcma(void) +{ + struct bcma_drv_cc *cc = &bcm47xx_bus.bcma.bus.drv_cc; + u32 base; + u32 lim; + + if (cc->pflash.present) { + base = cc->pflash.window; + lim = cc->pflash.window_size; +#ifdef CONFIG_BCMA_SFLASH + } else if (cc->sflash.present) { + base = cc->sflash.window; + lim = cc->sflash.size; +#endif + } else { + pr_err("Couldn't find supported flash memory\n"); + return; + } + + nvram_find_and_copy(base, lim); +} +#endif + +static void early_nvram_init(void) +{ + switch (bcm47xx_bus_type) { +#ifdef CONFIG_BCM47XX_SSB + case BCM47XX_BUS_TYPE_SSB: + nvram_init_ssb(); + break; +#endif +#ifdef CONFIG_BCM47XX_BCMA + case BCM47XX_BUS_TYPE_BCMA: + nvram_init_bcma(); + break; +#endif + } +} + int nvram_getenv(char *name, char *val, size_t val_len) { char *var, *value, *end, *eq; -- 2.7.4