From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- .../net/wireless/brcm80211/brcmfmac/firmware.c | 340 +++++++++++++++++++++ 1 file changed, 340 insertions(+) create mode 100644 kernel/drivers/net/wireless/brcm80211/brcmfmac/firmware.c (limited to 'kernel/drivers/net/wireless/brcm80211/brcmfmac/firmware.c') diff --git a/kernel/drivers/net/wireless/brcm80211/brcmfmac/firmware.c b/kernel/drivers/net/wireless/brcm80211/brcmfmac/firmware.c new file mode 100644 index 000000000..9cb99152a --- /dev/null +++ b/kernel/drivers/net/wireless/brcm80211/brcmfmac/firmware.c @@ -0,0 +1,340 @@ +/* + * 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 +#include +#include +#include +#include + +#include "debug.h" +#include "firmware.h" + +char brcmf_firmware_path[BRCMF_FW_PATH_LEN]; +module_param_string(firmware_path, brcmf_firmware_path, + BRCMF_FW_PATH_LEN, 0440); + +enum nvram_parser_state { + IDLE, + KEY, + VALUE, + COMMENT, + END +}; + +/** + * struct nvram_parser - internal info for parser. + * + * @state: current parser state. + * @fwnv: 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. + */ +struct nvram_parser { + enum nvram_parser_state state; + const struct firmware *fwnv; + u8 *nvram; + u32 nvram_len; + u32 line; + u32 column; + u32 pos; + u32 entry; +}; + +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); +} + +static bool is_whitespace(char c) +{ + return (c == ' ' || c == '\r' || c == '\n' || c == '\t'); +} + +static enum nvram_parser_state brcmf_nvram_handle_idle(struct nvram_parser *nvp) +{ + char c; + + c = nvp->fwnv->data[nvp->pos]; + if (c == '\n') + return COMMENT; + if (is_whitespace(c)) + 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; +} + +static enum nvram_parser_state brcmf_nvram_handle_key(struct nvram_parser *nvp) +{ + enum nvram_parser_state st = nvp->state; + char c; + + c = nvp->fwnv->data[nvp->pos]; + if (c == '=') { + /* ignore RAW1 by treating as comment */ + if (strncmp(&nvp->fwnv->data[nvp->entry], "RAW1", 4) == 0) + st = COMMENT; + else + st = VALUE; + } else if (!is_nvram_char(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; +} + +static enum nvram_parser_state +brcmf_nvram_handle_value(struct nvram_parser *nvp) +{ + char c; + char *skv; + char *ekv; + u32 cplen; + + c = nvp->fwnv->data[nvp->pos]; + if (!is_nvram_char(c)) { + /* key,value pair complete */ + ekv = (u8 *)&nvp->fwnv->data[nvp->pos]; + skv = (u8 *)&nvp->fwnv->data[nvp->entry]; + cplen = ekv - skv; + /* 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; +} + +static enum nvram_parser_state +brcmf_nvram_handle_comment(struct nvram_parser *nvp) +{ + char *eol, *sol; + + sol = (char *)&nvp->fwnv->data[nvp->pos]; + eol = strchr(sol, '\n'); + if (eol == NULL) + return END; + + /* eat all moving to next line */ + nvp->line++; + nvp->column = 1; + nvp->pos += (eol - sol) + 1; + return IDLE; +} + +static enum nvram_parser_state brcmf_nvram_handle_end(struct nvram_parser *nvp) +{ + /* final state */ + return END; +} + +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 struct firmware *nv) +{ + memset(nvp, 0, sizeof(*nvp)); + nvp->fwnv = nv; + /* Alloc for extra 0 byte + roundup by 4 + length field */ + nvp->nvram = kzalloc(nv->size + 1 + 3 + sizeof(u32), GFP_KERNEL); + if (!nvp->nvram) + return -ENOMEM; + + nvp->line = 1; + nvp->column = 1; + return 0; +} + +/* brcmf_nvram_strip :Takes a buffer of "=\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 struct firmware *nv, u32 *new_length) +{ + struct nvram_parser nvp; + u32 pad; + u32 token; + __le32 token_le; + + if (brcmf_init_nvram_parser(&nvp, nv) < 0) + return NULL; + + while (nvp.pos < nv->size) { + nvp.state = nv_parser_states[nvp.state](&nvp); + if (nvp.state == END) + break; + } + 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; +} + +void brcmf_fw_nvram_free(void *nvram) +{ + kfree(nvram); +} + +struct brcmf_fw { + struct device *dev; + u16 flags; + const struct firmware *code; + const char *nvram_name; + 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; + + brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(fwctx->dev)); + if (!fw && !(fwctx->flags & BRCMF_FW_REQ_NV_OPTIONAL)) + goto fail; + + if (fw) { + nvram = brcmf_fw_nvram_strip(fw, &nvram_length); + 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); +} + +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; + + /* when nvram is optional call .done() callback here */ + if (fwctx->flags & BRCMF_FW_REQ_NV_OPTIONAL) { + fwctx->done(fwctx->dev, fw, NULL, 0); + kfree(fwctx); + return; + } + + /* failed nvram request */ + release_firmware(fw); +fail: + brcmf_dbg(TRACE, "failed: dev=%s\n", dev_name(fwctx->dev)); + device_release_driver(fwctx->dev); + kfree(fwctx); +} + +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)) +{ + 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; + + return request_firmware_nowait(THIS_MODULE, true, code, dev, + GFP_KERNEL, fwctx, + brcmf_fw_request_code_done); +} -- cgit 1.2.3-korg