From 8d2a02b24d66aa359e83eebc1ed3c0f85367a1cb Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 16 May 2024 03:11:33 +0000
Subject: [PATCH] AX88772C_eeprom and ax8872c build together
---
kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c | 242 ++++++++++++++++++++++++++++++------------------
1 files changed, 152 insertions(+), 90 deletions(-)
diff --git a/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c b/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
index 9927079..060889b 100644
--- a/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
+++ b/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
@@ -1,19 +1,9 @@
+// SPDX-License-Identifier: ISC
/*
* Copyright (c) 2013 Broadcom Corporation
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
+#include <linux/efi.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/device.h>
@@ -46,7 +36,7 @@
* @state: current parser state.
* @data: input buffer being parsed.
* @nvram: output buffer with parse result.
- * @nvram_len: lenght of parse result.
+ * @nvram_len: length of parse result.
* @line: current line.
* @column: current column in line.
* @pos: byte offset in input buffer.
@@ -69,7 +59,7 @@
bool boardrev_found;
};
-/**
+/*
* is_nvram_char() - check if char is a valid one for NVRAM entry
*
* It accepts all printable ASCII chars except for '#' which opens a comment.
@@ -217,6 +207,8 @@
size = BRCMF_FW_MAX_NVRAM_SIZE;
else
size = data_len;
+ /* Add space for properties we may add */
+ size += strlen(BRCMF_FW_DEFAULT_BOARDREV) + 1;
/* Alloc for extra 0 byte + roundup by 4 + length field */
size += 1 + 3 + sizeof(u32);
nvp->nvram = kzalloc(size, GFP_KERNEL);
@@ -445,6 +437,75 @@
static void brcmf_fw_request_done(const struct firmware *fw, void *ctx);
+#ifdef CONFIG_EFI
+/* In some cases the EFI-var stored nvram contains "ccode=ALL" or "ccode=XV"
+ * to specify "worldwide" compatible settings, but these 2 ccode-s do not work
+ * properly. "ccode=ALL" causes channels 12 and 13 to not be available,
+ * "ccode=XV" causes all 5GHz channels to not be available. So we replace both
+ * with "ccode=X2" which allows channels 12+13 and 5Ghz channels in
+ * no-Initiate-Radiation mode. This means that we will never send on these
+ * channels without first having received valid wifi traffic on the channel.
+ */
+static void brcmf_fw_fix_efi_nvram_ccode(char *data, unsigned long data_len)
+{
+ char *ccode;
+
+ ccode = strnstr((char *)data, "ccode=ALL", data_len);
+ if (!ccode)
+ ccode = strnstr((char *)data, "ccode=XV\r", data_len);
+ if (!ccode)
+ return;
+
+ ccode[6] = 'X';
+ ccode[7] = '2';
+ ccode[8] = '\r';
+}
+
+static u8 *brcmf_fw_nvram_from_efi(size_t *data_len_ret)
+{
+ const u16 name[] = { 'n', 'v', 'r', 'a', 'm', 0 };
+ struct efivar_entry *nvram_efivar;
+ unsigned long data_len = 0;
+ u8 *data = NULL;
+ int err;
+
+ nvram_efivar = kzalloc(sizeof(*nvram_efivar), GFP_KERNEL);
+ if (!nvram_efivar)
+ return NULL;
+
+ memcpy(&nvram_efivar->var.VariableName, name, sizeof(name));
+ nvram_efivar->var.VendorGuid = EFI_GUID(0x74b00bd9, 0x805a, 0x4d61,
+ 0xb5, 0x1f, 0x43, 0x26,
+ 0x81, 0x23, 0xd1, 0x13);
+
+ err = efivar_entry_size(nvram_efivar, &data_len);
+ if (err)
+ goto fail;
+
+ data = kmalloc(data_len, GFP_KERNEL);
+ if (!data)
+ goto fail;
+
+ err = efivar_entry_get(nvram_efivar, NULL, &data_len, data);
+ if (err)
+ goto fail;
+
+ brcmf_fw_fix_efi_nvram_ccode(data, data_len);
+ brcmf_info("Using nvram EFI variable\n");
+
+ kfree(nvram_efivar);
+ *data_len_ret = data_len;
+ return data;
+
+fail:
+ kfree(data);
+ kfree(nvram_efivar);
+ return NULL;
+}
+#else
+static inline u8 *brcmf_fw_nvram_from_efi(size_t *data_len) { return NULL; }
+#endif
+
static void brcmf_fw_free_request(struct brcmf_fw_request *req)
{
struct brcmf_fw_item *item;
@@ -463,11 +524,12 @@
{
struct brcmf_fw *fwctx = ctx;
struct brcmf_fw_item *cur;
+ bool free_bcm47xx_nvram = false;
+ bool kfree_nvram = false;
u32 nvram_length = 0;
void *nvram = NULL;
u8 *data = NULL;
size_t data_len;
- bool raw_nvram;
brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(fwctx->dev));
@@ -476,12 +538,13 @@
if (fw && fw->data) {
data = (u8 *)fw->data;
data_len = fw->size;
- raw_nvram = false;
} else {
- data = bcm47xx_nvram_get_contents(&data_len);
- if (!data && !(cur->flags & BRCMF_FW_REQF_OPTIONAL))
+ if ((data = bcm47xx_nvram_get_contents(&data_len)))
+ free_bcm47xx_nvram = true;
+ else if ((data = brcmf_fw_nvram_from_efi(&data_len)))
+ kfree_nvram = true;
+ else if (!(cur->flags & BRCMF_FW_REQF_OPTIONAL))
goto fail;
- raw_nvram = true;
}
if (data)
@@ -489,8 +552,11 @@
fwctx->req->domain_nr,
fwctx->req->bus_nr);
- if (raw_nvram)
+ if (free_bcm47xx_nvram)
bcm47xx_nvram_release_contents(data);
+ if (kfree_nvram)
+ kfree(data);
+
release_firmware(fw);
if (!nvram && !(cur->flags & BRCMF_FW_REQF_OPTIONAL))
goto fail;
@@ -504,90 +570,75 @@
return -ENOENT;
}
-static int brcmf_fw_request_next_item(struct brcmf_fw *fwctx, bool async)
+static int brcmf_fw_complete_request(const struct firmware *fw,
+ struct brcmf_fw *fwctx)
{
- struct brcmf_fw_item *cur;
- const struct firmware *fw = NULL;
- int ret;
-
- cur = &fwctx->req->items[fwctx->curpos];
-
- brcmf_dbg(TRACE, "%srequest for %s\n", async ? "async " : "",
- cur->path);
-
- if (async)
- ret = request_firmware_nowait(THIS_MODULE, true, cur->path,
- fwctx->dev, GFP_KERNEL, fwctx,
- brcmf_fw_request_done);
- else
- ret = request_firmware(&fw, cur->path, fwctx->dev);
-
- if (ret < 0) {
- brcmf_fw_request_done(NULL, fwctx);
- } else if (!async && fw) {
- brcmf_dbg(TRACE, "firmware %s %sfound\n", cur->path,
- fw ? "" : "not ");
- if (cur->type == BRCMF_FW_TYPE_BINARY)
- cur->binary = fw;
- else if (cur->type == BRCMF_FW_TYPE_NVRAM)
- brcmf_fw_request_nvram_done(fw, fwctx);
- else
- release_firmware(fw);
-
- return -EAGAIN;
- }
- return 0;
-}
-
-static void brcmf_fw_request_done(const struct firmware *fw, void *ctx)
-{
- struct brcmf_fw *fwctx = ctx;
- struct brcmf_fw_item *cur;
+ struct brcmf_fw_item *cur = &fwctx->req->items[fwctx->curpos];
int ret = 0;
- cur = &fwctx->req->items[fwctx->curpos];
-
- brcmf_dbg(TRACE, "enter: firmware %s %sfound\n", cur->path,
- fw ? "" : "not ");
-
- if (!fw)
- ret = -ENOENT;
+ brcmf_dbg(TRACE, "firmware %s %sfound\n", cur->path, fw ? "" : "not ");
switch (cur->type) {
case BRCMF_FW_TYPE_NVRAM:
ret = brcmf_fw_request_nvram_done(fw, fwctx);
break;
case BRCMF_FW_TYPE_BINARY:
- cur->binary = fw;
+ if (fw)
+ cur->binary = fw;
+ else
+ ret = -ENOENT;
break;
default:
/* something fishy here so bail out early */
brcmf_err("unknown fw type: %d\n", cur->type);
release_firmware(fw);
ret = -EINVAL;
- goto fail;
}
- if (ret < 0 && !(cur->flags & BRCMF_FW_REQF_OPTIONAL))
- goto fail;
+ return (cur->flags & BRCMF_FW_REQF_OPTIONAL) ? 0 : ret;
+}
- do {
- if (++fwctx->curpos == fwctx->req->n_items) {
- ret = 0;
- goto done;
- }
+static int brcmf_fw_request_firmware(const struct firmware **fw,
+ struct brcmf_fw *fwctx)
+{
+ struct brcmf_fw_item *cur = &fwctx->req->items[fwctx->curpos];
+ int ret;
- ret = brcmf_fw_request_next_item(fwctx, false);
- } while (ret == -EAGAIN);
+ /* nvram files are board-specific, first try a board-specific path */
+ if (cur->type == BRCMF_FW_TYPE_NVRAM && fwctx->req->board_type) {
+ char alt_path[BRCMF_FW_NAME_LEN];
- return;
+ strlcpy(alt_path, cur->path, BRCMF_FW_NAME_LEN);
+ /* strip .txt at the end */
+ alt_path[strlen(alt_path) - 4] = 0;
+ strlcat(alt_path, ".", BRCMF_FW_NAME_LEN);
+ strlcat(alt_path, fwctx->req->board_type, BRCMF_FW_NAME_LEN);
+ strlcat(alt_path, ".txt", BRCMF_FW_NAME_LEN);
-fail:
- brcmf_dbg(TRACE, "failed err=%d: dev=%s, fw=%s\n", ret,
- dev_name(fwctx->dev), cur->path);
- brcmf_fw_free_request(fwctx->req);
- fwctx->req = NULL;
-done:
+ ret = request_firmware(fw, alt_path, fwctx->dev);
+ if (ret == 0)
+ return ret;
+ }
+
+ return request_firmware(fw, cur->path, fwctx->dev);
+}
+
+static void brcmf_fw_request_done(const struct firmware *fw, void *ctx)
+{
+ struct brcmf_fw *fwctx = ctx;
+ int ret;
+
+ ret = brcmf_fw_complete_request(fw, fwctx);
+
+ while (ret == 0 && ++fwctx->curpos < fwctx->req->n_items) {
+ brcmf_fw_request_firmware(&fw, fwctx);
+ ret = brcmf_fw_complete_request(fw, ctx);
+ }
+
+ if (ret) {
+ brcmf_fw_free_request(fwctx->req);
+ fwctx->req = NULL;
+ }
fwctx->done(fwctx->dev, ret, fwctx->req);
kfree(fwctx);
}
@@ -611,7 +662,9 @@
void (*fw_cb)(struct device *dev, int err,
struct brcmf_fw_request *req))
{
+ struct brcmf_fw_item *first = &req->items[0];
struct brcmf_fw *fwctx;
+ int ret;
brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(dev));
if (!fw_cb)
@@ -628,7 +681,12 @@
fwctx->req = req;
fwctx->done = fw_cb;
- brcmf_fw_request_next_item(fwctx, true);
+ ret = request_firmware_nowait(THIS_MODULE, true, first->path,
+ fwctx->dev, GFP_KERNEL, fwctx,
+ brcmf_fw_request_done);
+ if (ret < 0)
+ brcmf_fw_request_done(NULL, fwctx);
+
return 0;
}
@@ -644,7 +702,11 @@
size_t mp_path_len;
u32 i, j;
char end = '\0';
- size_t reqsz;
+
+ if (chiprev >= BITS_PER_TYPE(u32)) {
+ brcmf_err("Invalid chip revision %u\n", chiprev);
+ return NULL;
+ }
for (i = 0; i < table_size; i++) {
if (mapping_table[i].chipid == chip &&
@@ -652,17 +714,16 @@
break;
}
+ brcmf_chip_name(chip, chiprev, chipname, sizeof(chipname));
+
if (i == table_size) {
- brcmf_err("Unknown chipid %d [%d]\n", chip, chiprev);
+ brcmf_err("Unknown chip %s\n", chipname);
return NULL;
}
- reqsz = sizeof(*fwreq) + n_fwnames * sizeof(struct brcmf_fw_item);
- fwreq = kzalloc(reqsz, GFP_KERNEL);
+ fwreq = kzalloc(struct_size(fwreq, items, n_fwnames), GFP_KERNEL);
if (!fwreq)
return NULL;
-
- brcmf_chip_name(chip, chiprev, chipname, sizeof(chipname));
brcmf_info("using %s for chip %s\n",
mapping_table[i].fw_base, chipname);
@@ -676,6 +737,7 @@
for (j = 0; j < n_fwnames; j++) {
fwreq->items[j].path = fwnames[j].path;
+ fwnames[j].path[0] = '\0';
/* check if firmware path is provided by module parameter */
if (brcmf_mp_global.firmware_path[0] != '\0') {
strlcpy(fwnames[j].path, mp_path,
--
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