From d10a39d1a580db005d206fb6527a60fd9800c9fd Mon Sep 17 00:00:00 2001 From: Hans-Christian Egtvedt Date: Tue, 30 Oct 2007 16:33:07 +0100 Subject: [MTD] [NOR] More CFI fixups for Atmel chips MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Convert CFI tables from Atmel cmdset_0001 chips to Intel format and set BufWrite timeouts to 0 for Atmel cmdset_0001 and cmdset_0002 chips. Some chips may indicate support for buffered writes even though they only support dual-word writes. The CFI fixup must run before fixup_use_write_buffers for this to work. Signed-off-by: Håvard Skinnemoen Signed-off-by: David Woodhouse --- drivers/mtd/chips/cfi_cmdset_0001.c | 43 +++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) (limited to 'drivers/mtd/chips/cfi_cmdset_0001.c') diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c index a9eb1c51624..da851c217fc 100644 --- a/drivers/mtd/chips/cfi_cmdset_0001.c +++ b/drivers/mtd/chips/cfi_cmdset_0001.c @@ -50,6 +50,7 @@ #define I82802AC 0x00ac #define MANUFACTURER_ST 0x0020 #define M50LPW080 0x002F +#define AT49BV640D 0x02de static int cfi_intelext_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); static int cfi_intelext_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); @@ -157,6 +158,47 @@ static void cfi_tell_features(struct cfi_pri_intelext *extp) } #endif +/* Atmel chips don't use the same PRI format as Intel chips */ +static void fixup_convert_atmel_pri(struct mtd_info *mtd, void *param) +{ + struct map_info *map = mtd->priv; + struct cfi_private *cfi = map->fldrv_priv; + struct cfi_pri_intelext *extp = cfi->cmdset_priv; + struct cfi_pri_atmel atmel_pri; + uint32_t features = 0; + + /* Reverse byteswapping */ + extp->FeatureSupport = cpu_to_le32(extp->FeatureSupport); + extp->BlkStatusRegMask = cpu_to_le16(extp->BlkStatusRegMask); + extp->ProtRegAddr = cpu_to_le16(extp->ProtRegAddr); + + memcpy(&atmel_pri, extp, sizeof(atmel_pri)); + memset((char *)extp + 5, 0, sizeof(*extp) - 5); + + printk(KERN_ERR "atmel Features: %02x\n", atmel_pri.Features); + + if (atmel_pri.Features & 0x01) /* chip erase supported */ + features |= (1<<0); + if (atmel_pri.Features & 0x02) /* erase suspend supported */ + features |= (1<<1); + if (atmel_pri.Features & 0x04) /* program suspend supported */ + features |= (1<<2); + if (atmel_pri.Features & 0x08) /* simultaneous operations supported */ + features |= (1<<9); + if (atmel_pri.Features & 0x20) /* page mode read supported */ + features |= (1<<7); + if (atmel_pri.Features & 0x40) /* queued erase supported */ + features |= (1<<4); + if (atmel_pri.Features & 0x80) /* Protection bits supported */ + features |= (1<<6); + + extp->FeatureSupport = features; + + /* burst write mode not supported */ + cfi->cfiq->BufWriteTimeoutTyp = 0; + cfi->cfiq->BufWriteTimeoutMax = 0; +} + #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE /* Some Intel Strata Flash prior to FPO revision C has bugs in this area */ static void fixup_intel_strataflash(struct mtd_info *mtd, void* param) @@ -234,6 +276,7 @@ static void fixup_use_powerup_lock(struct mtd_info *mtd, void *param) } static struct cfi_fixup cfi_fixup_table[] = { + { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL }, #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE { CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash, NULL }, #endif -- cgit v1.2.3