diff options
Diffstat (limited to 'drivers/scsi/csiostor/csio_hw.c')
| -rw-r--r-- | drivers/scsi/csiostor/csio_hw.c | 115 |
1 files changed, 102 insertions, 13 deletions
diff --git a/drivers/scsi/csiostor/csio_hw.c b/drivers/scsi/csiostor/csio_hw.c index a10cf25ee7f9..23d07e9f87d0 100644 --- a/drivers/scsi/csiostor/csio_hw.c +++ b/drivers/scsi/csiostor/csio_hw.c @@ -761,27 +761,116 @@ out: static int csio_hw_get_flash_params(struct csio_hw *hw) { + /* Table for non-Numonix supported flash parts. Numonix parts are left + * to the preexisting code. All flash parts have 64KB sectors. + */ + static struct flash_desc { + u32 vendor_and_model_id; + u32 size_mb; + } supported_flash[] = { + { 0x150201, 4 << 20 }, /* Spansion 4MB S25FL032P */ + }; + + u32 part, manufacturer; + u32 density, size = 0; + u32 flashid = 0; int ret; - uint32_t info = 0; ret = csio_hw_sf1_write(hw, 1, 1, 0, SF_RD_ID); if (!ret) - ret = csio_hw_sf1_read(hw, 3, 0, 1, &info); + ret = csio_hw_sf1_read(hw, 3, 0, 1, &flashid); csio_wr_reg32(hw, 0, SF_OP_A); /* unlock SF */ - if (ret != 0) + if (ret) return ret; - if ((info & 0xff) != 0x20) /* not a Numonix flash */ - return -EINVAL; - info >>= 16; /* log2 of size */ - if (info >= 0x14 && info < 0x18) - hw->params.sf_nsec = 1 << (info - 16); - else if (info == 0x18) - hw->params.sf_nsec = 64; - else - return -EINVAL; - hw->params.sf_size = 1 << info; + /* Check to see if it's one of our non-standard supported Flash parts. + */ + for (part = 0; part < ARRAY_SIZE(supported_flash); part++) + if (supported_flash[part].vendor_and_model_id == flashid) { + hw->params.sf_size = supported_flash[part].size_mb; + hw->params.sf_nsec = + hw->params.sf_size / SF_SEC_SIZE; + goto found; + } + + /* Decode Flash part size. The code below looks repetative with + * common encodings, but that's not guaranteed in the JEDEC + * specification for the Read JADEC ID command. The only thing that + * we're guaranteed by the JADEC specification is where the + * Manufacturer ID is in the returned result. After that each + * Manufacturer ~could~ encode things completely differently. + * Note, all Flash parts must have 64KB sectors. + */ + manufacturer = flashid & 0xff; + switch (manufacturer) { + case 0x20: { /* Micron/Numonix */ + /* This Density -> Size decoding table is taken from Micron + * Data Sheets. + */ + density = (flashid >> 16) & 0xff; + switch (density) { + case 0x14 ... 0x19: /* 1MB - 32MB */ + size = 1 << density; + break; + case 0x20: /* 64MB */ + size = 1 << 26; + break; + case 0x21: /* 128MB */ + size = 1 << 27; + break; + case 0x22: /* 256MB */ + size = 1 << 28; + } + break; + } + case 0x9d: { /* ISSI -- Integrated Silicon Solution, Inc. */ + /* This Density -> Size decoding table is taken from ISSI + * Data Sheets. + */ + density = (flashid >> 16) & 0xff; + switch (density) { + case 0x16: /* 32 MB */ + size = 1 << 25; + break; + case 0x17: /* 64MB */ + size = 1 << 26; + } + break; + } + case 0xc2: /* Macronix */ + case 0xef: /* Winbond */ { + /* This Density -> Size decoding table is taken from + * Macronix and Winbond Data Sheets. + */ + density = (flashid >> 16) & 0xff; + switch (density) { + case 0x17: /* 8MB */ + case 0x18: /* 16MB */ + size = 1 << density; + } + } + } + + /* If we didn't recognize the FLASH part, that's no real issue: the + * Hardware/Software contract says that Hardware will _*ALWAYS*_ + * use a FLASH part which is at least 4MB in size and has 64KB + * sectors. The unrecognized FLASH part is likely to be much larger + * than 4MB, but that's all we really need. + */ + if (size == 0) { + csio_warn(hw, "Unknown Flash Part, ID = %#x, assuming 4MB\n", + flashid); + size = 1 << 22; + } + + /* Store decoded Flash size */ + hw->params.sf_size = size; + hw->params.sf_nsec = size / SF_SEC_SIZE; +found: + if (hw->params.sf_size < FLASH_MIN_SIZE) + csio_warn(hw, "WARNING: Flash Part ID %#x, size %#x < %#x\n", + flashid, hw->params.sf_size, FLASH_MIN_SIZE); return 0; } |