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