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rtl8xxxu: Fix device info for RTL8192EU devices

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[ Upstream commit c240b044edefa3c3af4014a4030e017dd95b59a1 ]

Based on 2001:3319 and 2357:0109 which I used to test the fix and
0bda:818b and 2357:0108 for which I found efuse dumps online.

== 2357:0109 ==
=== Before ===
Vendor: Realtek
Product: \x03802.11n NI
Serial:
=== After ===
Vendor: Realtek
Product: 802.11n NIC
Serial not available.

== 2001:3319 ==
=== Before ===
Vendor: Realtek
Product: Wireless N
Serial: no USB Adap
=== After ===
Vendor: Realtek
Product: Wireless N Nano USB Adapter
Serial not available.

Signed-off-by: Pascal Terjan <pterjan@google.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210424172959.1559890-1-pterjan@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pascal Terjan 2021-04-24 18:29:59 +01:00 committed by Greg Kroah-Hartman
parent a10e871b73
commit 50ce920fe1
2 changed files with 56 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h
View File

@ -853,15 +853,10 @@ struct rtl8192eu_efuse {
u8 usb_optional_function;
u8 res9[2];
u8 mac_addr[ETH_ALEN]; /* 0xd7 */
u8 res10[2];
u8 vendor_name[7];
u8 res11[2];
u8 device_name[0x0b]; /* 0xe8 */
u8 res12[2];
u8 serial[0x0b]; /* 0xf5 */
u8 res13[0x30];
u8 device_info[80];
u8 res11[3];
u8 unknown[0x0d]; /* 0x130 */
u8 res14[0xc3];
u8 res12[0xc3];
};
struct rtl8xxxu_reg8val {

59
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8192e.c
View File

@ -554,9 +554,43 @@ rtl8192e_set_tx_power(struct rtl8xxxu_priv *priv, int channel, bool ht40)
}
}
static void rtl8192eu_log_next_device_info(struct rtl8xxxu_priv *priv,
char *record_name,
char *device_info,
unsigned int *record_offset)
{
char *record = device_info + *record_offset;
/* A record is [ total length | 0x03 | value ] */
unsigned char l = record[0];
/*
* The whole device info section seems to be 80 characters, make sure
* we don't read further.
*/
if (*record_offset + l > 80) {
dev_warn(&priv->udev->dev,
"invalid record length %d while parsing \"%s\" at offset %u.\n",
l, record_name, *record_offset);
return;
}
if (l >= 2) {
char value[80];
memcpy(value, &record[2], l - 2);
value[l - 2] = '\0';
dev_info(&priv->udev->dev, "%s: %s\n", record_name, value);
*record_offset = *record_offset + l;
} else {
dev_info(&priv->udev->dev, "%s not available.\n", record_name);
}
}
static int rtl8192eu_parse_efuse(struct rtl8xxxu_priv *priv)
{
struct rtl8192eu_efuse *efuse = &priv->efuse_wifi.efuse8192eu;
unsigned int record_offset;
int i;
if (efuse->rtl_id != cpu_to_le16(0x8129))
@ -604,12 +638,25 @@ static int rtl8192eu_parse_efuse(struct rtl8xxxu_priv *priv)
priv->has_xtalk = 1;
priv->xtalk = priv->efuse_wifi.efuse8192eu.xtal_k & 0x3f;
dev_info(&priv->udev->dev, "Vendor: %.7s\n", efuse->vendor_name);
dev_info(&priv->udev->dev, "Product: %.11s\n", efuse->device_name);
if (memchr_inv(efuse->serial, 0xff, 11))
dev_info(&priv->udev->dev, "Serial: %.11s\n", efuse->serial);
else
dev_info(&priv->udev->dev, "Serial not available.\n");
/*
* device_info section seems to be laid out as records
* [ total length | 0x03 | value ] so:
* - vendor length + 2
* - 0x03
* - vendor string (not null terminated)
* - product length + 2
* - 0x03
* - product string (not null terminated)
* Then there is one or 2 0x00 on all the 4 devices I own or found
* dumped online.
* As previous version of the code handled an optional serial
* string, I now assume there may be a third record if the
* length is not 0.
*/
record_offset = 0;
rtl8192eu_log_next_device_info(priv, "Vendor", efuse->device_info, &record_offset);
rtl8192eu_log_next_device_info(priv, "Product", efuse->device_info, &record_offset);
rtl8192eu_log_next_device_info(priv, "Serial", efuse->device_info, &record_offset);
if (rtl8xxxu_debug & RTL8XXXU_DEBUG_EFUSE) {
unsigned char *raw = priv->efuse_wifi.raw;