Release 4.11 drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
/*
* 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/kernel.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/bcm47xx_nvram.h>
#include "debug.h"
#include "firmware.h"
#include "core.h"
#include "common.h"
#define BRCMF_FW_MAX_NVRAM_SIZE 64000
#define BRCMF_FW_NVRAM_DEVPATH_LEN 19
/* devpath0=pcie/1/4/ */
#define BRCMF_FW_NVRAM_PCIEDEV_LEN 10
/* pcie/1/4/ + \0 */
#define BRCMF_FW_DEFAULT_BOARDREV "boardrev=0xff"
enum nvram_parser_state {
IDLE,
KEY,
VALUE,
COMMENT,
END
};
/**
* struct nvram_parser - internal info for parser.
*
* @state: current parser state.
* @data: input buffer being parsed.
* @nvram: output buffer with parse result.
* @nvram_len: lenght of parse result.
* @line: current line.
* @column: current column in line.
* @pos: byte offset in input buffer.
* @entry: start position of key,value entry.
* @multi_dev_v1: detect pcie multi device v1 (compressed).
* @multi_dev_v2: detect pcie multi device v2.
* @boardrev_found: nvram contains boardrev information.
*/
struct nvram_parser {
enum nvram_parser_state state;
const u8 *data;
u8 *nvram;
u32 nvram_len;
u32 line;
u32 column;
u32 pos;
u32 entry;
bool multi_dev_v1;
bool multi_dev_v2;
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.
* Please note that ' ' (space) while accepted is not a valid key name char.
*/
static bool is_nvram_char(char c)
{
/* comment marker excluded */
if (c == '#')
return false;
/* key and value may have any other readable character */
return (c >= 0x20 && c < 0x7f);
}
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static bool is_whitespace(char c)
{
return (c == ' ' || c == '\r' || c == '\n' || c == '\t');
}
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static enum nvram_parser_state brcmf_nvram_handle_idle(struct nvram_parser *nvp)
{
char c;
c = nvp->data[nvp->pos];
if (c == '\n')
return COMMENT;
if (is_whitespace(c) || c == '\0')
goto proceed;
if (c == '#')
return COMMENT;
if (is_nvram_char(c)) {
nvp->entry = nvp->pos;
return KEY;
}
brcmf_dbg(INFO, "warning: ln=%d:col=%d: ignoring invalid character\n",
nvp->line, nvp->column);
proceed:
nvp->column++;
nvp->pos++;
return IDLE;
}
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Total | 108 | 100.00% | 3 | 100.00% |
static enum nvram_parser_state brcmf_nvram_handle_key(struct nvram_parser *nvp)
{
enum nvram_parser_state st = nvp->state;
char c;
c = nvp->data[nvp->pos];
if (c == '=') {
/* ignore RAW1 by treating as comment */
if (strncmp(&nvp->data[nvp->entry], "RAW1", 4) == 0)
st = COMMENT;
else
st = VALUE;
if (strncmp(&nvp->data[nvp->entry], "devpath", 7) == 0)
nvp->multi_dev_v1 = true;
if (strncmp(&nvp->data[nvp->entry], "pcie/", 5) == 0)
nvp->multi_dev_v2 = true;
if (strncmp(&nvp->data[nvp->entry], "boardrev", 8) == 0)
nvp->boardrev_found = true;
} else if (!is_nvram_char(c) || c == ' ') {
brcmf_dbg(INFO, "warning: ln=%d:col=%d: '=' expected, skip invalid key entry\n",
nvp->line, nvp->column);
return COMMENT;
}
nvp->column++;
nvp->pos++;
return st;
}
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Total | 200 | 100.00% | 6 | 100.00% |
static enum nvram_parser_state
brcmf_nvram_handle_value(struct nvram_parser *nvp)
{
char c;
char *skv;
char *ekv;
u32 cplen;
c = nvp->data[nvp->pos];
if (!is_nvram_char(c)) {
/* key,value pair complete */
ekv = (u8 *)&nvp->data[nvp->pos];
skv = (u8 *)&nvp->data[nvp->entry];
cplen = ekv - skv;
if (nvp->nvram_len + cplen + 1 >= BRCMF_FW_MAX_NVRAM_SIZE)
return END;
/* copy to output buffer */
memcpy(&nvp->nvram[nvp->nvram_len], skv, cplen);
nvp->nvram_len += cplen;
nvp->nvram[nvp->nvram_len] = '\0';
nvp->nvram_len++;
return IDLE;
}
nvp->pos++;
nvp->column++;
return VALUE;
}
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static enum nvram_parser_state
brcmf_nvram_handle_comment(struct nvram_parser *nvp)
{
char *eoc, *sol;
sol = (char *)&nvp->data[nvp->pos];
eoc = strchr(sol, '\n');
if (!eoc) {
eoc = strchr(sol, '\0');
if (!eoc)
return END;
}
/* eat all moving to next line */
nvp->line++;
nvp->column = 1;
nvp->pos += (eoc - sol) + 1;
return IDLE;
}
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Total | 95 | 100.00% | 3 | 100.00% |
static enum nvram_parser_state brcmf_nvram_handle_end(struct nvram_parser *nvp)
{
/* final state */
return END;
}
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static enum nvram_parser_state
(
*nv_parser_states[])(struct nvram_parser *nvp) = {
brcmf_nvram_handle_idle,
brcmf_nvram_handle_key,
brcmf_nvram_handle_value,
brcmf_nvram_handle_comment,
brcmf_nvram_handle_end
};
static int brcmf_init_nvram_parser(struct nvram_parser *nvp,
const u8 *data, size_t data_len)
{
size_t size;
memset(nvp, 0, sizeof(*nvp));
nvp->data = data;
/* Limit size to MAX_NVRAM_SIZE, some files contain lot of comment */
if (data_len > BRCMF_FW_MAX_NVRAM_SIZE)
size = BRCMF_FW_MAX_NVRAM_SIZE;
else
size = data_len;
/* Alloc for extra 0 byte + roundup by 4 + length field */
size += 1 + 3 + sizeof(u32);
nvp->nvram = kzalloc(size, GFP_KERNEL);
if (!nvp->nvram)
return -ENOMEM;
nvp->line = 1;
nvp->column = 1;
return 0;
}
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Total | 107 | 100.00% | 3 | 100.00% |
/* brcmf_fw_strip_multi_v1 :Some nvram files contain settings for multiple
* devices. Strip it down for one device, use domain_nr/bus_nr to determine
* which data is to be returned. v1 is the version where nvram is stored
* compressed and "devpath" maps to index for valid entries.
*/
static void brcmf_fw_strip_multi_v1(struct nvram_parser *nvp, u16 domain_nr,
u16 bus_nr)
{
/* Device path with a leading '=' key-value separator */
char pci_path[] = "=pci/?/?";
size_t pci_len;
char pcie_path[] = "=pcie/?/?";
size_t pcie_len;
u32 i, j;
bool found;
u8 *nvram;
u8 id;
nvram = kzalloc(nvp->nvram_len + 1 + 3 + sizeof(u32), GFP_KERNEL);
if (!nvram)
goto fail;
/* min length: devpath0=pcie/1/4/ + 0:x=y */
if (nvp->nvram_len < BRCMF_FW_NVRAM_DEVPATH_LEN + 6)
goto fail;
/* First search for the devpathX and see if it is the configuration
* for domain_nr/bus_nr. Search complete nvp
*/
snprintf(pci_path, sizeof(pci_path), "=pci/%d/%d", domain_nr,
bus_nr);
pci_len = strlen(pci_path);
snprintf(pcie_path, sizeof(pcie_path), "=pcie/%d/%d", domain_nr,
bus_nr);
pcie_len = strlen(pcie_path);
found = false;
i = 0;
while (i < nvp->nvram_len - BRCMF_FW_NVRAM_DEVPATH_LEN) {
/* Format: devpathX=pcie/Y/Z/
* Y = domain_nr, Z = bus_nr, X = virtual ID
*/
if (strncmp(&nvp->nvram[i], "devpath", 7) == 0 &&
(!strncmp(&nvp->nvram[i + 8], pci_path, pci_len) ||
!strncmp(&nvp->nvram[i + 8], pcie_path, pcie_len))) {
id = nvp->nvram[i + 7] - '0';
found = true;
break;
}
while (nvp->nvram[i] != 0)
i++;
i++;
}
if (!found)
goto fail;
/* Now copy all valid entries, release old nvram and assign new one */
i = 0;
j = 0;
while (i < nvp->nvram_len) {
if ((nvp->nvram[i] - '0' == id) && (nvp->nvram[i + 1] == ':')) {
i += 2;
if (strncmp(&nvp->nvram[i], "boardrev", 8) == 0)
nvp->boardrev_found = true;
while (nvp->nvram[i] != 0) {
nvram[j] = nvp->nvram[i];
i++;
j++;
}
nvram[j] = 0;
j++;
}
while (nvp->nvram[i] != 0)
i++;
i++;
}
kfree(nvp->nvram);
nvp->nvram = nvram;
nvp->nvram_len = j;
return;
fail:
kfree(nvram);
nvp->nvram_len = 0;
}
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/* brcmf_fw_strip_multi_v2 :Some nvram files contain settings for multiple
* devices. Strip it down for one device, use domain_nr/bus_nr to determine
* which data is to be returned. v2 is the version where nvram is stored
* uncompressed, all relevant valid entries are identified by
* pcie/domain_nr/bus_nr:
*/
static void brcmf_fw_strip_multi_v2(struct nvram_parser *nvp, u16 domain_nr,
u16 bus_nr)
{
char prefix[BRCMF_FW_NVRAM_PCIEDEV_LEN];
size_t len;
u32 i, j;
u8 *nvram;
nvram = kzalloc(nvp->nvram_len + 1 + 3 + sizeof(u32), GFP_KERNEL);
if (!nvram)
goto fail;
/* Copy all valid entries, release old nvram and assign new one.
* Valid entries are of type pcie/X/Y/ where X = domain_nr and
* Y = bus_nr.
*/
snprintf(prefix, sizeof(prefix), "pcie/%d/%d/", domain_nr, bus_nr);
len = strlen(prefix);
i = 0;
j = 0;
while (i < nvp->nvram_len - len) {
if (strncmp(&nvp->nvram[i], prefix, len) == 0) {
i += len;
if (strncmp(&nvp->nvram[i], "boardrev", 8) == 0)
nvp->boardrev_found = true;
while (nvp->nvram[i] != 0) {
nvram[j] = nvp->nvram[i];
i++;
j++;
}
nvram[j] = 0;
j++;
}
while (nvp->nvram[i] != 0)
i++;
i++;
}
kfree(nvp->nvram);
nvp->nvram = nvram;
nvp->nvram_len = j;
return;
fail:
kfree(nvram);
nvp->nvram_len = 0;
}
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Total | 248 | 100.00% | 5 | 100.00% |
static void brcmf_fw_add_defaults(struct nvram_parser *nvp)
{
if (nvp->boardrev_found)
return;
memcpy(&nvp->nvram[nvp->nvram_len], &BRCMF_FW_DEFAULT_BOARDREV,
strlen(BRCMF_FW_DEFAULT_BOARDREV));
nvp->nvram_len += strlen(BRCMF_FW_DEFAULT_BOARDREV);
nvp->nvram[nvp->nvram_len] = '\0';
nvp->nvram_len++;
}
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/* brcmf_nvram_strip :Takes a buffer of "<var>=<value>\n" lines read from a fil
* and ending in a NUL. Removes carriage returns, empty lines, comment lines,
* and converts newlines to NULs. Shortens buffer as needed and pads with NULs.
* End of buffer is completed with token identifying length of buffer.
*/
static void *brcmf_fw_nvram_strip(const u8 *data, size_t data_len,
u32 *new_length, u16 domain_nr, u16 bus_nr)
{
struct nvram_parser nvp;
u32 pad;
u32 token;
__le32 token_le;
if (brcmf_init_nvram_parser(&nvp, data, data_len) < 0)
return NULL;
while (nvp.pos < data_len) {
nvp.state = nv_parser_states[nvp.state](&nvp);
if (nvp.state == END)
break;
}
if (nvp.multi_dev_v1) {
nvp.boardrev_found = false;
brcmf_fw_strip_multi_v1(&nvp, domain_nr, bus_nr);
} else if (nvp.multi_dev_v2) {
nvp.boardrev_found = false;
brcmf_fw_strip_multi_v2(&nvp, domain_nr, bus_nr);
}
if (nvp.nvram_len == 0) {
kfree(nvp.nvram);
return NULL;
}
brcmf_fw_add_defaults(&nvp);
pad = nvp.nvram_len;
*new_length = roundup(nvp.nvram_len + 1, 4);
while (pad != *new_length) {
nvp.nvram[pad] = 0;
pad++;
}
token = *new_length / 4;
token = (~token << 16) | (token & 0x0000FFFF);
token_le = cpu_to_le32(token);
memcpy(&nvp.nvram[*new_length], &token_le, sizeof(token_le));
*new_length += sizeof(token_le);
return nvp.nvram;
}
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Total | 267 | 100.00% | 7 | 100.00% |
void brcmf_fw_nvram_free(void *nvram)
{
kfree(nvram);
}
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struct brcmf_fw {
struct device *dev;
u16 flags;
const struct firmware *code;
const char *nvram_name;
u16 domain_nr;
u16 bus_nr;
void (*done)(struct device *dev, const struct firmware *fw,
void *nvram_image, u32 nvram_len);
};
static void brcmf_fw_request_nvram_done(const struct firmware *fw, void *ctx)
{
struct brcmf_fw *fwctx = ctx;
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));
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 && !(fwctx->flags & BRCMF_FW_REQ_NV_OPTIONAL))
goto fail;
raw_nvram = true;
}
if (data)
nvram = brcmf_fw_nvram_strip(data, data_len, &nvram_length,
fwctx->domain_nr, fwctx->bus_nr);
if (raw_nvram)
bcm47xx_nvram_release_contents(data);
release_firmware(fw);
if (!nvram && !(fwctx->flags & BRCMF_FW_REQ_NV_OPTIONAL))
goto fail;
fwctx->done(fwctx->dev, fwctx->code, nvram, nvram_length);
kfree(fwctx);
return;
fail:
brcmf_dbg(TRACE, "failed: dev=%s\n", dev_name(fwctx->dev));
release_firmware(fwctx->code);
device_release_driver(fwctx->dev);
kfree(fwctx);
}
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Total | 235 | 100.00% | 4 | 100.00% |
static void brcmf_fw_request_code_done(const struct firmware *fw, void *ctx)
{
struct brcmf_fw *fwctx = ctx;
int ret;
brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(fwctx->dev));
if (!fw)
goto fail;
/* only requested code so done here */
if (!(fwctx->flags & BRCMF_FW_REQUEST_NVRAM)) {
fwctx->done(fwctx->dev, fw, NULL, 0);
kfree(fwctx);
return;
}
fwctx->code = fw;
ret = request_firmware_nowait(THIS_MODULE, true, fwctx->nvram_name,
fwctx->dev, GFP_KERNEL, fwctx,
brcmf_fw_request_nvram_done);
if (!ret)
return;
brcmf_fw_request_nvram_done(NULL, fwctx);
return;
fail:
brcmf_dbg(TRACE, "failed: dev=%s\n", dev_name(fwctx->dev));
device_release_driver(fwctx->dev);
kfree(fwctx);
}
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int brcmf_fw_get_firmwares_pcie(struct device *dev, u16 flags,
const char *code, const char *nvram,
void (*fw_cb)(struct device *dev,
const struct firmware *fw,
void *nvram_image, u32 nvram_len),
u16 domain_nr, u16 bus_nr)
{
struct brcmf_fw *fwctx;
brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(dev));
if (!fw_cb || !code)
return -EINVAL;
if ((flags & BRCMF_FW_REQUEST_NVRAM) && !nvram)
return -EINVAL;
fwctx = kzalloc(sizeof(*fwctx), GFP_KERNEL);
if (!fwctx)
return -ENOMEM;
fwctx->dev = dev;
fwctx->flags = flags;
fwctx->done = fw_cb;
if (flags & BRCMF_FW_REQUEST_NVRAM)
fwctx->nvram_name = nvram;
fwctx->domain_nr = domain_nr;
fwctx->bus_nr = bus_nr;
return request_firmware_nowait(THIS_MODULE, true, code, dev,
GFP_KERNEL, fwctx,
brcmf_fw_request_code_done);
}
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Total | 180 | 100.00% | 2 | 100.00% |
int brcmf_fw_get_firmwares(struct device *dev, u16 flags,
const char *code, const char *nvram,
void (*fw_cb)(struct device *dev,
const struct firmware *fw,
void *nvram_image, u32 nvram_len))
{
return brcmf_fw_get_firmwares_pcie(dev, flags, code, nvram, fw_cb, 0,
0);
}
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Hante Meuleman | 66 | 100.00% | 1 | 100.00% |
Total | 66 | 100.00% | 1 | 100.00% |
int brcmf_fw_map_chip_to_name(u32 chip, u32 chiprev,
struct brcmf_firmware_mapping mapping_table[],
u32 table_size, char fw_name[BRCMF_FW_NAME_LEN],
char nvram_name[BRCMF_FW_NAME_LEN])
{
u32 i;
char end;
for (i = 0; i < table_size; i++) {
if (mapping_table[i].chipid == chip &&
mapping_table[i].revmask & BIT(chiprev))
break;
}
if (i == table_size) {
brcmf_err("Unknown chipid %d [%d]\n", chip, chiprev);
return -ENODEV;
}
/* check if firmware path is provided by module parameter */
if (brcmf_mp_global.firmware_path[0] != '\0') {
strlcpy(fw_name, brcmf_mp_global.firmware_path,
BRCMF_FW_NAME_LEN);
if ((nvram_name) && (mapping_table[i].nvram))
strlcpy(nvram_name, brcmf_mp_global.firmware_path,
BRCMF_FW_NAME_LEN);
end = brcmf_mp_global.firmware_path[
strlen(brcmf_mp_global.firmware_path) - 1];
if (end != '/') {
strlcat(fw_name, "/", BRCMF_FW_NAME_LEN);
if ((nvram_name) && (mapping_table[i].nvram))
strlcat(nvram_name, "/", BRCMF_FW_NAME_LEN);
}
}
strlcat(fw_name, mapping_table[i].fw, BRCMF_FW_NAME_LEN);
if ((nvram_name) && (mapping_table[i].nvram))
strlcat(nvram_name, mapping_table[i].nvram, BRCMF_FW_NAME_LEN);
return 0;
}
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Person | Tokens | Prop | Commits | CommitProp |
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Total | 251 | 100.00% | 2 | 100.00% |
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Hante Meuleman | 1504 | 52.90% | 7 | 35.00% |
Arend Van Spriel | 1159 | 40.77% | 5 | 25.00% |
Rafał Miłecki | 177 | 6.23% | 7 | 35.00% |
Daniel Kim | 3 | 0.11% | 1 | 5.00% |
Total | 2843 | 100.00% | 20 | 100.00% |
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