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carl9170: move checksum and txseq into subfunctions 

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter 2011-12-27 21:01:55 +01:00 committed by John W. Linville
parent 3f81f8f152
commit 65a692284d
1 changed files with 60 additions and 37 deletions
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97
drivers/net/wireless/ath/carl9170/fw.c
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@ -146,13 +146,15 @@ static bool valid_cpu_addr(const u32 address)
return false;
}
static int carl9170_fw(struct ar9170 *ar, const __u8 *data, size_t len)
static int carl9170_fw_checksum(struct ar9170 *ar, const __u8 *data,
size_t len)
{
const struct carl9170fw_otus_desc *otus_desc;
const struct carl9170fw_chk_desc *chk_desc;
const struct carl9170fw_last_desc *last_desc;
const struct carl9170fw_txsq_desc *txsq_desc;
u16 if_comb_types;
const struct carl9170fw_chk_desc *chk_desc;
unsigned long fin, diff;
unsigned int dsc_len;
u32 crc32;
last_desc = carl9170_fw_find_desc(ar, LAST_MAGIC,
sizeof(*last_desc), CARL9170FW_LAST_DESC_CUR_VER);
@ -170,36 +172,68 @@ static int carl9170_fw(struct ar9170 *ar, const __u8 *data, size_t len)
chk_desc = carl9170_fw_find_desc(ar, CHK_MAGIC,
sizeof(*chk_desc), CARL9170FW_CHK_DESC_CUR_VER);
if (chk_desc) {
unsigned long fin, diff;
unsigned int dsc_len;
u32 crc32;
if (!chk_desc) {
dev_warn(&ar->udev->dev, "Unprotected firmware image.\n");
return 0;
}
dsc_len = min_t(unsigned int, len,
dsc_len = min_t(unsigned int, len,
(unsigned long)chk_desc - (unsigned long)otus_desc);
fin = (unsigned long) last_desc + sizeof(*last_desc);
diff = fin - (unsigned long) otus_desc;
fin = (unsigned long) last_desc + sizeof(*last_desc);
diff = fin - (unsigned long) otus_desc;
if (diff < len)
len -= diff;
if (diff < len)
len -= diff;
if (len < 256)
return -EIO;
if (len < 256)
return -EIO;
crc32 = crc32_le(~0, data, len);
if (cpu_to_le32(crc32) != chk_desc->fw_crc32) {
dev_err(&ar->udev->dev, "fw checksum test failed.\n");
return -ENOEXEC;
}
crc32 = crc32_le(~0, data, len);
if (cpu_to_le32(crc32) != chk_desc->fw_crc32) {
dev_err(&ar->udev->dev, "fw checksum test failed.\n");
return -ENOEXEC;
}
crc32 = crc32_le(crc32, (void *)otus_desc, dsc_len);
if (cpu_to_le32(crc32) != chk_desc->hdr_crc32) {
dev_err(&ar->udev->dev, "descriptor check failed.\n");
crc32 = crc32_le(crc32, (void *)otus_desc, dsc_len);
if (cpu_to_le32(crc32) != chk_desc->hdr_crc32) {
dev_err(&ar->udev->dev, "descriptor check failed.\n");
return -EINVAL;
}
return 0;
}
static int carl9170_fw_tx_sequence(struct ar9170 *ar)
{
const struct carl9170fw_txsq_desc *txsq_desc;
txsq_desc = carl9170_fw_find_desc(ar, TXSQ_MAGIC, sizeof(*txsq_desc),
CARL9170FW_TXSQ_DESC_CUR_VER);
if (txsq_desc) {
ar->fw.tx_seq_table = le32_to_cpu(txsq_desc->seq_table_addr);
if (!valid_cpu_addr(ar->fw.tx_seq_table))
return -EINVAL;
}
} else {
dev_warn(&ar->udev->dev, "Unprotected firmware image.\n");
ar->fw.tx_seq_table = 0;
}
return 0;
}
static int carl9170_fw(struct ar9170 *ar, const __u8 *data, size_t len)
{
const struct carl9170fw_otus_desc *otus_desc;
int err;
u16 if_comb_types;
err = carl9170_fw_checksum(ar, data, len);
if (err)
return err;
otus_desc = carl9170_fw_find_desc(ar, OTUS_MAGIC,
sizeof(*otus_desc), CARL9170FW_OTUS_DESC_CUR_VER);
if (!otus_desc) {
return -ENODATA;
}
#define SUPP(feat) \
@ -321,19 +355,8 @@ static int carl9170_fw(struct ar9170 *ar, const __u8 *data, size_t len)
ar->hw->wiphy->interface_modes |= if_comb_types;
txsq_desc = carl9170_fw_find_desc(ar, TXSQ_MAGIC,
sizeof(*txsq_desc), CARL9170FW_TXSQ_DESC_CUR_VER);
if (txsq_desc) {
ar->fw.tx_seq_table = le32_to_cpu(txsq_desc->seq_table_addr);
if (!valid_cpu_addr(ar->fw.tx_seq_table))
return -EINVAL;
} else {
ar->fw.tx_seq_table = 0;
}
#undef SUPPORTED
return 0;
return carl9170_fw_tx_sequence(ar);
}
static struct carl9170fw_desc_head *