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76 lines
2.5 KiB
Diff
76 lines
2.5 KiB
Diff
From 88001968245c42c26416476bf0ef960442371605 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Mon, 14 May 2018 08:48:20 +0200
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Subject: [PATCH] brcmfmac: add debugfs entry for reading firmware capabilities
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This allows reading all capabilities as reported by a firmware. They are
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printed using native (raw) names, just like developers like it the most.
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It's how firmware reports support for various features, e.g. supported
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modes, supported standards, power saving details, max BSS-es.
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Access to all that info is useful for trying new firmwares, comparing
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them and debugging features AKA bugs.
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
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Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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---
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.../wireless/broadcom/brcm80211/brcmfmac/feature.c | 36 ++++++++++++++++++++++
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1 file changed, 36 insertions(+)
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--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c
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+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c
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@@ -165,6 +165,41 @@ static void brcmf_feat_firmware_capabili
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}
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}
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+/**
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+ * brcmf_feat_fwcap_debugfs_read() - expose firmware capabilities to debugfs.
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+ *
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+ * @seq: sequence for debugfs entry.
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+ * @data: raw data pointer.
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+ */
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+static int brcmf_feat_fwcap_debugfs_read(struct seq_file *seq, void *data)
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+{
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+ struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
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+ struct brcmf_if *ifp = brcmf_get_ifp(bus_if->drvr, 0);
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+ char caps[MAX_CAPS_BUFFER_SIZE + 1] = { };
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+ char *tmp;
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+ int err;
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+
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+ err = brcmf_fil_iovar_data_get(ifp, "cap", caps, sizeof(caps));
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+ if (err) {
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+ brcmf_err("could not get firmware cap (%d)\n", err);
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+ return err;
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+ }
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+
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+ /* Put every capability in a new line */
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+ for (tmp = caps; *tmp; tmp++) {
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+ if (*tmp == ' ')
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+ *tmp = '\n';
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+ }
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+
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+ /* Usually there is a space at the end of capabilities string */
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+ seq_printf(seq, "%s", caps);
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+ /* So make sure we don't print two line breaks */
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+ if (tmp > caps && *(tmp - 1) != '\n')
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+ seq_printf(seq, "\n");
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+
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+ return 0;
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+}
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+
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void brcmf_feat_attach(struct brcmf_pub *drvr)
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{
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struct brcmf_if *ifp = brcmf_get_ifp(drvr, 0);
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@@ -233,6 +268,7 @@ void brcmf_feat_attach(struct brcmf_pub
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void brcmf_feat_debugfs_create(struct brcmf_pub *drvr)
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{
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brcmf_debugfs_add_entry(drvr, "features", brcmf_feat_debugfs_read);
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+ brcmf_debugfs_add_entry(drvr, "fwcap", brcmf_feat_fwcap_debugfs_read);
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}
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bool brcmf_feat_is_enabled(struct brcmf_if *ifp, enum brcmf_feat_id id)
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