From 92ecbff48e3993ca58525533dc58ec1025c45609 Mon Sep 17 00:00:00 2001 From: Sam Leffler Date: Wed, 7 Sep 2011 10:55:16 +0300 Subject: [PATCH] ath6kl: query device tree for firmware board-id When no default board data file is present query the device tree for a board-id setting to identify the board data to use. If the FDT lacks the necesary info fall back to the previous behaviour of using a compile-time board filename. Signed-off-by: Sam Leffler Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath6kl/init.c | 64 ++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) diff --git a/drivers/net/wireless/ath/ath6kl/init.c b/drivers/net/wireless/ath/ath6kl/init.c index eca34aa..9171670 100644 --- a/drivers/net/wireless/ath/ath6kl/init.c +++ b/drivers/net/wireless/ath/ath6kl/init.c @@ -15,6 +15,7 @@ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +#include #include #include "core.h" #include "cfg80211.h" @@ -680,6 +681,64 @@ static int ath6kl_get_fw(struct ath6kl *ar, const char *filename, return ret; } +#ifdef CONFIG_OF +static const char *get_target_ver_dir(const struct ath6kl *ar) +{ + switch (ar->version.target_ver) { + case AR6003_REV1_VERSION: + return "ath6k/AR6003/hw1.0"; + case AR6003_REV2_VERSION: + return "ath6k/AR6003/hw2.0"; + case AR6003_REV3_VERSION: + return "ath6k/AR6003/hw2.1.1"; + } + ath6kl_warn("%s: unsupported target version 0x%x.\n", __func__, + ar->version.target_ver); + return NULL; +} + +/* + * Check the device tree for a board-id and use it to construct + * the pathname to the firmware file. Used (for now) to find a + * fallback to the "bdata.bin" file--typically a symlink to the + * appropriate board-specific file. + */ +static bool check_device_tree(struct ath6kl *ar) +{ + static const char *board_id_prop = "atheros,board-id"; + struct device_node *node; + char board_filename[64]; + const char *board_id; + int ret; + + for_each_compatible_node(node, NULL, "atheros,ath6kl") { + board_id = of_get_property(node, board_id_prop, NULL); + if (board_id == NULL) { + ath6kl_warn("No \"%s\" property on %s node.\n", + board_id_prop, node->name); + continue; + } + snprintf(board_filename, sizeof(board_filename), + "%s/bdata.%s.bin", get_target_ver_dir(ar), board_id); + + ret = ath6kl_get_fw(ar, board_filename, &ar->fw_board, + &ar->fw_board_len); + if (ret) { + ath6kl_err("Failed to get DT board file %s: %d\n", + board_filename, ret); + continue; + } + return true; + } + return false; +} +#else +static bool check_device_tree(struct ath6kl *ar) +{ + return false; +} +#endif /* CONFIG_OF */ + static int ath6kl_fetch_board_file(struct ath6kl *ar) { const char *filename; @@ -704,6 +763,11 @@ static int ath6kl_fetch_board_file(struct ath6kl *ar) return 0; } + if (check_device_tree(ar)) { + /* got board file from device tree */ + return 0; + } + /* there was no proper board file, try to use default instead */ ath6kl_warn("Failed to get board file %s (%d), trying to find default board file.\n", filename, ret); -- 2.7.4