/* Firmware file reading and download helpers
*
* See copyright notice in main.c
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/firmware.h>
#include <linux/device.h>
#include "hermes.h"
#include "hermes_dld.h"
#include "orinoco.h"
#include "fw.h"
/* End markers (for Symbol firmware only) */
#define TEXT_END 0x1A /* End of text header */
struct fw_info {
char *pri_fw;
char *sta_fw;
char *ap_fw;
u32 pda_addr;
u16 pda_size;
};
static const struct fw_info orinoco_fw[] = {
{ NULL, "agere_sta_fw.bin", "agere_ap_fw.bin", 0x00390000, 1000 },
{ NULL, "prism_sta_fw.bin", "prism_ap_fw.bin", 0, 1024 },
{ "symbol_sp24t_prim_fw", "symbol_sp24t_sec_fw", NULL, 0x00003100, 512 }
};
MODULE_FIRMWARE("agere_sta_fw.bin");
MODULE_FIRMWARE("agere_ap_fw.bin");
MODULE_FIRMWARE("prism_sta_fw.bin");
MODULE_FIRMWARE("prism_ap_fw.bin");
MODULE_FIRMWARE("symbol_sp24t_prim_fw");
MODULE_FIRMWARE("symbol_sp24t_sec_fw");
/* Structure used to access fields in FW
* Make sure LE decoding macros are used
*/
struct orinoco_fw_header {
char hdr_vers[6]; /* ASCII string for header version */
__le16 headersize; /* Total length of header */
__le32 entry_point; /* NIC entry point */
__le32 blocks; /* Number of blocks to program */
__le32 block_offset; /* Offset of block data from eof header */
__le32 pdr_offset; /* Offset to PDR data from eof header */
__le32 pri_offset; /* Offset to primary plug data */
__le32 compat_offset; /* Offset to compatibility data*/
char signature[0]; /* FW signature length headersize-20 */
} __packed;
/* Check the range of various header entries. Return a pointer to a
* description of the problem, or NULL if everything checks out. */
static const char *validate_fw(const struct orinoco_fw_header *hdr, size_t len)
{
u16 hdrsize;
if (len < sizeof(*hdr))
return "image too small";
if (memcmp(hdr->hdr_vers, "HFW", 3) != 0)
return "format not recognised";
hdrsize = le16_to_cpu(hdr->headersize);
if (hdrsize > len)
return "bad headersize";
if ((hdrsize + le32_to_cpu(hdr->block_offset)) > len)
return "bad block offset";
if ((hdrsize + le32_to_cpu(hdr->pdr_offset)) > len)
return "bad PDR offset";
if ((hdrsize + le32_to_cpu(hdr->pri_offset)) > len)
return "bad PRI offset";
if ((hdrsize + le32_to_cpu(hdr->compat_offset)) > len)
return "bad compat offset";
/* TODO: consider adding a checksum or CRC to the firmware format */
return NULL;
}
#if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP)
static inline const struct firmware *
orinoco_cached_fw_get(struct orinoco_private *priv, bool primary)
{
if (primary)
return priv->cached_pri_fw;
else
return priv->cached_fw;
}
#else
#define orinoco_cached_fw_get(priv, primary) (NULL)
#endif
/* Download either STA or AP firmware into the card. */
static int
orinoco_dl_firmware(struct orinoco_private *priv,
const struct fw_info *fw,
int ap)
{
/* Plug Data Area (PDA) */
__le16 *pda;
hermes_t *hw = &priv->hw;
const struct firmware *fw_entry;
const struct orinoco_fw_header *hdr;
const unsigned char *first_block;
const void *end;
const char *firmware;
const char *fw_err;
struct device *dev = priv->dev;
int err = 0;
pda = kzalloc(fw->pda_size, GFP_KERNEL);
if (!pda)
return -ENOMEM;
if (ap)
firmware = fw->ap_fw;
else
firmware = fw->sta_fw;
dev_dbg(dev, "Attempting to download firmware %s\n", firmware);
/* Read current plug data */
err = hw->ops->read_pda(hw, pda, fw->pda_addr, fw->pda_size);
dev_dbg(dev, "Read PDA returned %d\n", err);
if (err)
goto free;
if (!orinoco_cached_fw_get(priv, false)) {
err = request_firmware(&fw_entry, firmware, priv->dev);
if (err) {
dev_err(dev, "Cannot find firmware %s\n", firmware);
err = -ENOENT;
goto free;
}
} else
fw_entry = orinoco_cached_fw_get(priv, false);
hdr = (const struct orinoco_fw_header *) fw_entry->data;
fw_err = validate_fw(hdr, fw_entry->size);
if (fw_err) {
dev_warn(dev, "Invalid firmware image detected (%s). "
"Aborting download\n", fw_err);
err = -EINVAL;
goto abort;
}
/* Enable aux port to allow programming */
err = hw->ops->program_init(hw, le32_to_cpu(hdr->entry_point));
dev_dbg(dev, "Program init returned %d\n", err);
if (err != 0)
goto abort;
/* Program data */
first_block = (fw_entry->data +
le16_to_cpu(hdr->headersize) +
le32_to_cpu(hdr->block_offset));
end = fw_entry->data + fw_entry->size;
err = hermes_program(hw, first_block, end);
dev_dbg(dev, "Program returned %d\n", err);
if (err != 0)
goto abort;
/* Update production data */
first_block = (fw_entry->data +
le16_to_cpu(hdr->headersize) +
le32_to_cpu(hdr->pdr_offset));
err = hermes_apply_pda_with_defaults(hw, first_block, end, pda,
&pda[fw->pda_size / sizeof(*pda)]);
dev_dbg(dev, "Apply PDA returned %d\n", err);
if (err)
goto abort;
/* Tell card we've finished */
err = hw->ops->program_end(hw);
dev_dbg(dev, "Program end returned %d\n", err);
if (err != 0)
goto abort;
/* Check if we're running */
dev_dbg(dev, "hermes_present returned %d\n", hermes_present(hw));
abort:
/* If we requested the firmware, release it. */
if (!orinoco_cached_fw_get(priv, false))
release_firmware(fw_entry);
free:
kfree(pda);
return err;
}
/*
* Process a firmware image - stop the card, load the firmware, reset
* the card and make sure it responds. For the secondary firmware take
* care of the PDA - read it and then write it on top of the firmware.
*/
static int
symbol_dl_image(struct orinoco_private *priv, const struct fw_info *fw,
const unsigned char *image, const void *end,
int secondary)
{
hermes_t *hw = &priv->hw;
int ret = 0;
const unsigned char *ptr;
const unsigned char *first_block;
/* Plug Data Area (PDA) */
__le16 *pda = NULL;
/* Binary block begins after the 0x1A marker */
ptr = image;
while (*ptr++ != TEXT_END);
first_block = ptr;
/* Read the PDA from EEPROM */
if (secondary) {
pda = kzalloc(fw->pda_size, GFP_KERNEL);
if (!pda)
return -ENOMEM;
ret = hw->ops->read_pda(hw, pda, fw->pda_addr, fw->pda_size);
if (ret)
goto free;
}
/* Stop the firmware, so that it can be safely rewritten */
if (priv->stop_fw) {
ret = priv->stop_fw(priv, 1);
if (ret)
goto free;
}
/* Program the adapter with new firmware */
ret = hermes_program(hw, first_block, end);
if (ret)
goto free;
/* Write the PDA to the adapter */
if (secondary) {
size_t len = hermes_blocks_length(first_block, end);
ptr = first_block + len;
ret = hermes_apply_pda(hw, ptr, end, pda,
&pda[fw->pda_size / sizeof(*pda)]);
kfree(pda);
if (ret)
return ret;
}
/* Run the firmware */
if (priv->stop_fw) {
ret = priv->stop_fw(priv, 0);
if (ret)
return ret;
}
/* Reset hermes chip and make sure it responds */
ret = hw->ops->init(hw);
/* hermes_reset() should return 0 with the secondary firmware */
if (secondary && ret != 0)
return -ENODEV;
/* And this should work with any firmware */
if (!hermes_present(hw))
return -ENODEV;
return 0;
free:
kfree(pda);
return ret;
}
/*
* Download the firmware into the card, this also does a PCMCIA soft
* reset on the card, to make sure it's in a sane state.
*/
static int
symbol_dl_firmware(struct orinoco_private *priv,
const struct fw_info *fw)
{
struct device *dev = priv->dev;
int ret;
const struct firmware *fw_entry;
if (!orinoco_cached_fw_get(priv, true)) {
if (request_firmware(&fw_entry, fw->pri_fw, priv->dev) != 0) {
dev_err(dev, "Cannot find firmware: %s\n", fw->pri_fw);
return -ENOENT;
}
} else
fw_entry = orinoco_cached_fw_get(priv, true);
/* Load primary firmware */
ret = symbol_dl_image(priv, fw, fw_entry->data,
fw_entry->data + fw_entry->size, 0);
if (!orinoco_cached_fw_get(priv, true))
release_firmware(fw_entry);
if (ret) {
dev_err(dev, "Primary firmware download failed\n");
return ret;
}
if (!orinoco_cached_fw_get(priv, false)) {
if (request_firmware(&fw_entry, fw->sta_fw, priv->dev) != 0) {
dev_err(dev, "Cannot find firmware: %s\n", fw->sta_fw);
return -ENOENT;
}
} else
fw_entry = orinoco_cached_fw_get(priv, false);
/* Load secondary firmware */
ret = symbol_dl_image(priv, fw, fw_entry->data,
fw_entry->data + fw_entry->size, 1);
if (!orinoco_cached_fw_get(priv, false))
release_firmware(fw_entry);
if (ret) {
dev_err(dev, "Secondary firmware download failed\n");
}
return ret;
}
int orinoco_download(struct orinoco_private *priv)
{
int err = 0;
/* Reload firmware */
switch (priv->firmware_type) {
case FIRMWARE_TYPE_AGERE:
/* case FIRMWARE_TYPE_INTERSIL: */
err = orinoco_dl_firmware(priv,
&orinoco_fw[priv->firmware_type], 0);
break;
case FIRMWARE_TYPE_SYMBOL:
err = symbol_dl_firmware(priv,
&orinoco_fw[priv->firmware_type]);
break;
case FIRMWARE_TYPE_INTERSIL:
break;
}
/* TODO: if we fail we probably need to reinitialise
* the driver */
return err;
}
#if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP)
void orinoco_cache_fw(struct orinoco_private *priv, int ap)
{
const struct firmware *fw_entry = NULL;
const char *pri_fw;
const char *fw;
pri_fw = orinoco_fw[priv->firmware_type].pri_fw;
if (ap)
fw = orinoco_fw[priv->firmware_type].ap_fw;
else
fw = orinoco_fw[priv->firmware_type].sta_fw;
if (pri_fw) {
if (request_firmware(&fw_entry, pri_fw, priv->dev) == 0)
priv->cached_pri_fw = fw_entry;
}
if (fw) {
if (request_firmware(&fw_entry, fw, priv->dev) == 0)
priv->cached_fw = fw_entry;
}
}
void orinoco_uncache_fw(struct orinoco_private *priv)
{
if (priv->cached_pri_fw)
release_firmware(priv->cached_pri_fw);
if (priv->cached_fw)
release_firmware(priv->cached_fw);
priv->cached_pri_fw = NULL;
priv->cached_fw = NULL;
}
#endif
