From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/net/wireless/orinoco/fw.c | 382 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 382 insertions(+) create mode 100644 drivers/net/wireless/orinoco/fw.c (limited to 'drivers/net/wireless/orinoco/fw.c') diff --git a/drivers/net/wireless/orinoco/fw.c b/drivers/net/wireless/orinoco/fw.c new file mode 100644 index 000000000..ea29dccd5 --- /dev/null +++ b/drivers/net/wireless/orinoco/fw.c @@ -0,0 +1,382 @@ +/* Firmware file reading and download helpers + * + * See copyright notice in main.c + */ +#include +#include +#include +#include +#include + +#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, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/", 0x00390000, 1000 }, + { NULL, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/", 0, 1024 }, + { "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/", NULL, 0x00003100, 512 } +}; +/*(DEBLOBBED)*/ + +/* 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; + + struct hermes *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 = reject_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) +{ + struct hermes *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 (reject_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 (reject_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 (reject_firmware(&fw_entry, pri_fw, priv->dev) == 0) + priv->cached_pri_fw = fw_entry; + } + + if (fw) { + if (reject_firmware(&fw_entry, fw, priv->dev) == 0) + priv->cached_fw = fw_entry; + } +} + +void orinoco_uncache_fw(struct orinoco_private *priv) +{ + release_firmware(priv->cached_pri_fw); + release_firmware(priv->cached_fw); + priv->cached_pri_fw = NULL; + priv->cached_fw = NULL; +} +#endif -- cgit v1.2.3-54-g00ecf