- 根目录:
- drivers
- net
- wireless
- orinoco
- hermes_dld.c
/*
* Hermes download helper.
*
* This helper:
* - is capable of writing to the volatile area of the hermes device
* - is currently not capable of writing to non-volatile areas
* - provide helpers to identify and update plugin data
* - is not capable of interpreting a fw image directly. That is up to
* the main card driver.
* - deals with Hermes I devices. It can probably be modified to deal
* with Hermes II devices
*
* Copyright (C) 2007, David Kilroy
*
* Plug data code slightly modified from spectrum_cs driver
* Copyright (C) 2002-2005 Pavel Roskin <proski@gnu.org>
* Portions based on information in wl_lkm_718 Agere driver
* COPYRIGHT (C) 2001-2004 by Agere Systems Inc. All Rights Reserved
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License
* at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and
* limitations under the License.
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License version 2 (the "GPL"), in
* which case the provisions of the GPL are applicable instead of the
* above. If you wish to allow the use of your version of this file
* only under the terms of the GPL and not to allow others to use your
* version of this file under the MPL, indicate your decision by
* deleting the provisions above and replace them with the notice and
* other provisions required by the GPL. If you do not delete the
* provisions above, a recipient may use your version of this file
* under either the MPL or the GPL.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include "hermes.h"
#include "hermes_dld.h"
#define PFX "hermes_dld: "
/* End markers used in dblocks */
#define PDI_END 0x00000000 /* End of PDA */
#define BLOCK_END 0xFFFFFFFF /* Last image block */
#define TEXT_END 0x1A /* End of text header */
/*
* The following structures have little-endian fields denoted by
* the leading underscore. Don't access them directly - use inline
* functions defined below.
*/
/*
* The binary image to be downloaded consists of series of data blocks.
* Each block has the following structure.
*/
struct dblock {
__le32 addr; /* adapter address where to write the block */
__le16 len; /* length of the data only, in bytes */
char data[0]; /* data to be written */
} __packed;
/*
* Plug Data References are located in the image after the last data
* block. They refer to areas in the adapter memory where the plug data
* items with matching ID should be written.
*/
struct pdr {
__le32 id; /* record ID */
__le32 addr; /* adapter address where to write the data */
__le32 len; /* expected length of the data, in bytes */
char next[0]; /* next PDR starts here */
} __packed;
/*
* Plug Data Items are located in the EEPROM read from the adapter by
* primary firmware. They refer to the device-specific data that should
* be plugged into the secondary firmware.
*/
struct pdi {
__le16 len; /* length of ID and data, in words */
__le16 id; /* record ID */
char data[0]; /* plug data */
} __packed;
/*** FW data block access functions ***/
static inline u32
dblock_addr(const struct dblock *blk)
{
return le32_to_cpu(blk->addr);
}
static inline u32
dblock_len(const struct dblock *blk)
{
return le16_to_cpu(blk->len);
}
/*** PDR Access functions ***/
static inline u32
pdr_id(const struct pdr *pdr)
{
return le32_to_cpu(pdr->id);
}
static inline u32
pdr_addr(const struct pdr *pdr)
{
return le32_to_cpu(pdr->addr);
}
static inline u32
pdr_len(const struct pdr *pdr)
{
return le32_to_cpu(pdr->len);
}
/*** PDI Access functions ***/
static inline u32
pdi_id(const struct pdi *pdi)
{
return le16_to_cpu(pdi->id);
}
/* Return length of the data only, in bytes */
static inline u32
pdi_len(const struct pdi *pdi)
{
return 2 * (le16_to_cpu(pdi->len) - 1);
}
/*** Plug Data Functions ***/
/*
* Scan PDR for the record with the specified RECORD_ID.
* If it's not found, return NULL.
*/
static const struct pdr *
hermes_find_pdr(const struct pdr *first_pdr, u32 record_id, const void *end)
{
const struct pdr *pdr = first_pdr;
end -= sizeof(struct pdr);
while (((void *) pdr <= end) &&
(pdr_id(pdr) != PDI_END)) {
/*
* PDR area is currently not terminated by PDI_END.
* It's followed by CRC records, which have the type
* field where PDR has length. The type can be 0 or 1.
*/
if (pdr_len(pdr) < 2)
return NULL;
/* If the record ID matches, we are done */
if (pdr_id(pdr) == record_id)
return pdr;
pdr = (struct pdr *) pdr->next;
}
return NULL;
}
/* Scan production data items for a particular entry */
static const struct pdi *
hermes_find_pdi(const struct pdi *first_pdi, u32 record_id, const void *end)
{
const struct pdi *pdi = first_pdi;
end -= sizeof(struct pdi);
while (((void *) pdi <= end) &&
(pdi_id(pdi) != PDI_END)) {
/* If the record ID matches, we are done */
if (pdi_id(pdi) == record_id)
return pdi;
pdi = (struct pdi *) &pdi->data[pdi_len(pdi)];
}
return NULL;
}
/* Process one Plug Data Item - find corresponding PDR and plug it */
static int
hermes_plug_pdi(struct hermes *hw, const struct pdr *first_pdr,
const struct pdi *pdi, const void *pdr_end)
{
const struct pdr *pdr;
/* Find the PDR corresponding to this PDI */
pdr = hermes_find_pdr(first_pdr, pdi_id(pdi), pdr_end);
/* No match is found, safe to ignore */
if (!pdr)
return 0;
/* Lengths of the data in PDI and PDR must match */
if (pdi_len(pdi) != pdr_len(pdr))
return -EINVAL;
/* do the actual plugging */
hw->ops->program(hw, pdi->data, pdr_addr(pdr), pdi_len(pdi));
return 0;
}
/* Parse PDA and write the records into the adapter
*
* Attempt to write every records that is in the specified pda
* which also has a valid production data record for the firmware.
*/
int hermes_apply_pda(struct hermes *hw,
const char *first_pdr,
const void *pdr_end,
const __le16 *pda,
const void *pda_end)
{
int ret;
const struct pdi *pdi;
const struct pdr *pdr;
pdr = (const struct pdr *) first_pdr;
pda_end -= sizeof(struct pdi);
/* Go through every PDI and plug them into the adapter */
pdi = (const struct pdi *) (pda + 2);
while (((void *) pdi <= pda_end) &&
(pdi_id(pdi) != PDI_END)) {
ret = hermes_plug_pdi(hw, pdr, pdi, pdr_end);
if (ret)
return ret;
/* Increment to the next PDI */
pdi = (const struct pdi *) &pdi->data[pdi_len(pdi)];
}
return 0;
}
/* Identify the total number of bytes in all blocks
* including the header data.
*/
size_t
hermes_blocks_length(const char *first_block, const void *end)
{
const struct dblock *blk = (const struct dblock *) first_block;
int total_len = 0;
int len;
end -= sizeof(*blk);
/* Skip all blocks to locate Plug Data References
* (Spectrum CS) */
while (((void *) blk <= end) &&
(dblock_addr(blk) != BLOCK_END)) {
len = dblock_len(blk);
total_len += sizeof(*blk) + len;
blk = (struct dblock *) &blk->data[len];
}
return total_len;
}
/*** Hermes programming ***/
/* Program the data blocks */
int hermes_program(struct hermes *hw, const char *first_block, const void *end)
{
const struct dblock *blk;
u32 blkaddr;
u32 blklen;
int err = 0;
blk = (const struct dblock *) first_block;
if ((void *) blk > (end - sizeof(*blk)))
return -EIO;
blkaddr = dblock_addr(blk);
blklen = dblock_len(blk);
while ((blkaddr != BLOCK_END) &&
(((void *) blk + blklen) <= end)) {
pr_debug(PFX "Programming block of length %d "
"to address 0x%08x\n", blklen, blkaddr);
err = hw->ops->program(hw, blk->data, blkaddr, blklen);
if (err)
break;
blk = (const struct dblock *) &blk->data[blklen];
if ((void *) blk > (end - sizeof(*blk)))
return -EIO;
blkaddr = dblock_addr(blk);
blklen = dblock_len(blk);
}
return err;
}
/*** Default plugging data for Hermes I ***/
/* Values from wl_lkm_718/hcf/dhf.c */
#define DEFINE_DEFAULT_PDR(pid, length, data) \
static const struct { \
__le16 len; \
__le16 id; \
u8 val[length]; \
} __packed default_pdr_data_##pid = { \
cpu_to_le16((sizeof(default_pdr_data_##pid)/ \
sizeof(__le16)) - 1), \
cpu_to_le16(pid), \
data \
}
#define DEFAULT_PDR(pid) default_pdr_data_##pid
/* HWIF Compatibility */
DEFINE_DEFAULT_PDR(0x0005, 10, "\x00\x00\x06\x00\x01\x00\x01\x00\x01\x00");
/* PPPPSign */
DEFINE_DEFAULT_PDR(0x0108, 4, "\x00\x00\x00\x00");
/* PPPPProf */
DEFINE_DEFAULT_PDR(0x0109, 10, "\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00");
/* Antenna diversity */
DEFINE_DEFAULT_PDR(0x0150, 2, "\x00\x3F");
/* Modem VCO band Set-up */
DEFINE_DEFAULT_PDR(0x0160, 28,
"\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00");
/* Modem Rx Gain Table Values */
DEFINE_DEFAULT_PDR(0x0161, 256,
"\x3F\x01\x3F\01\x3F\x01\x3F\x01"
"\x3F\x01\x3F\01\x3F\x01\x3F\x01"
"\x3F\x01\x3F\01\x3F\x01\x3F\x01"
"\x3F\x01\x3F\01\x3F\x01\x3F\x01"
"\x3F\x01\x3E\01\x3E\x01\x3D\x01"
"\x3D\x01\x3C\01\x3C\x01\x3B\x01"
"\x3B\x01\x3A\01\x3A\x01\x39\x01"
"\x39\x01\x38\01\x38\x01\x37\x01"
"\x37\x01\x36\01\x36\x01\x35\x01"
"\x35\x01\x34\01\x34\x01\x33\x01"
"\x33\x01\x32\x01\x32\x01\x31\x01"
"\x31\x01\x30\x01\x30\x01\x7B\x01"
"\x7B\x01\x7A\x01\x7A\x01\x79\x01"
"\x79\x01\x78\x01\x78\x01\x77\x01"
"\x77\x01\x76\x01\x76\x01\x75\x01"
"\x75\x01\x74\x01\x74\x01\x73\x01"
"\x73\x01\x72\x01\x72\x01\x71\x01"
"\x71\x01\x70\x01\x70\x01\x68\x01"
"\x68\x01\x67\x01\x67\x01\x66\x01"
"\x66\x01\x65\x01\x65\x01\x57\x01"
"\x57\x01\x56\x01\x56\x01\x55\x01"
"\x55\x01\x54\x01\x54\x01\x53\x01"
"\x53\x01\x52\x01\x52\x01\x51\x01"
"\x51\x01\x50\x01\x50\x01\x48\x01"
"\x48\x01\x47\x01\x47\x01\x46\x01"
"\x46\x01\x45\x01\x45\x01\x44\x01"
"\x44\x01\x43\x01\x43\x01\x42\x01"
"\x42\x01\x41\x01\x41\x01\x40\x01"
"\x40\x01\x40\x01\x40\x01\x40\x01"
"\x40\x01\x40\x01\x40\x01\x40\x01"
"\x40\x01\x40\x01\x40\x01\x40\x01"
"\x40\x01\x40\x01\x40\x01\x40\x01");
/* Write PDA according to certain rules.
*
* For every production data record, look for a previous setting in
* the pda, and use that.
*
* For certain records, use defaults if they are not found in pda.
*/
int hermes_apply_pda_with_defaults(struct hermes *hw,
const char *first_pdr,
const void *pdr_end,
const __le16 *pda,
const void *pda_end)
{
const struct pdr *pdr = (const struct pdr *) first_pdr;
const struct pdi *first_pdi = (const struct pdi *) &pda[2];
const struct pdi *pdi;
const struct pdi *default_pdi = NULL;
const struct pdi *outdoor_pdi;
int record_id;
pdr_end -= sizeof(struct pdr);
while (((void *) pdr <= pdr_end) &&
(pdr_id(pdr) != PDI_END)) {
/*
* For spectrum_cs firmwares,
* PDR area is currently not terminated by PDI_END.
* It's followed by CRC records, which have the type
* field where PDR has length. The type can be 0 or 1.
*/
if (pdr_len(pdr) < 2)
break;
record_id = pdr_id(pdr);
pdi = hermes_find_pdi(first_pdi, record_id, pda_end);
if (pdi)
pr_debug(PFX "Found record 0x%04x at %p\n",
record_id, pdi);
switch (record_id) {
case 0x110: /* Modem REFDAC values */
case 0x120: /* Modem VGDAC values */
outdoor_pdi = hermes_find_pdi(first_pdi, record_id + 1,
pda_end);
default_pdi = NULL;
if (outdoor_pdi) {
pdi = outdoor_pdi;
pr_debug(PFX
"Using outdoor record 0x%04x at %p\n",
record_id + 1, pdi);
}
break;
case 0x5: /* HWIF Compatibility */
default_pdi = (struct pdi *) &DEFAULT_PDR(0x0005);
break;
case 0x108: /* PPPPSign */
default_pdi = (struct pdi *) &DEFAULT_PDR(0x0108);
break;
case 0x109: /* PPPPProf */
default_pdi = (struct pdi *) &DEFAULT_PDR(0x0109);
break;
case 0x150: /* Antenna diversity */
default_pdi = (struct pdi *) &DEFAULT_PDR(0x0150);
break;
case 0x160: /* Modem VCO band Set-up */
default_pdi = (struct pdi *) &DEFAULT_PDR(0x0160);
break;
case 0x161: /* Modem Rx Gain Table Values */
default_pdi = (struct pdi *) &DEFAULT_PDR(0x0161);
break;
default:
default_pdi = NULL;
break;
}
if (!pdi && default_pdi) {
/* Use default */
pdi = default_pdi;
pr_debug(PFX "Using default record 0x%04x at %p\n",
record_id, pdi);
}
if (pdi) {
/* Lengths of the data in PDI and PDR must match */
if ((pdi_len(pdi) == pdr_len(pdr)) &&
((void *) pdi->data + pdi_len(pdi) < pda_end)) {
/* do the actual plugging */
hw->ops->program(hw, pdi->data, pdr_addr(pdr),
pdi_len(pdi));
}
}
pdr++;
}
return 0;
}