diff options
Diffstat (limited to 'drivers/staging/wfx/main.c')
| -rw-r--r-- | drivers/staging/wfx/main.c | 37 |
1 files changed, 27 insertions, 10 deletions
diff --git a/drivers/staging/wfx/main.c b/drivers/staging/wfx/main.c index 4b9fdf99981b..858d778cc589 100644 --- a/drivers/staging/wfx/main.c +++ b/drivers/staging/wfx/main.c @@ -35,7 +35,7 @@ #define WFX_PDS_MAX_SIZE 1500 -MODULE_DESCRIPTION("Silicon Labs 802.11 Wireless LAN driver for WFx"); +MODULE_DESCRIPTION("Silicon Labs 802.11 Wireless LAN driver for WF200"); MODULE_AUTHOR("Jérôme Pouiller <jerome.pouiller@silabs.com>"); MODULE_LICENSE("GPL"); @@ -92,7 +92,7 @@ static const struct ieee80211_supported_band wfx_band_2ghz = { .bitrates = wfx_rates, .n_bitrates = ARRAY_SIZE(wfx_rates), .ht_cap = { - // Receive caps + /* Receive caps */ .cap = IEEE80211_HT_CAP_GRN_FLD | IEEE80211_HT_CAP_SGI_20 | IEEE80211_HT_CAP_MAX_AMSDU | (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT), @@ -100,7 +100,7 @@ static const struct ieee80211_supported_band wfx_band_2ghz = { .ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K, .ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE, .mcs = { - .rx_mask = { 0xFF }, // MCS0 to MCS7 + .rx_mask = { 0xFF }, /* MCS0 to MCS7 */ .rx_highest = cpu_to_le16(72), .tx_params = IEEE80211_HT_MCS_TX_DEFINED, }, @@ -163,7 +163,20 @@ bool wfx_api_older_than(struct wfx_dev *wdev, int major, int minor) return false; } -/* NOTE: wfx_send_pds() destroy buf */ +/* The device needs data about the antenna configuration. This information in + * provided by PDS (Platform Data Set, this is the wording used in WF200 + * documentation) files. For hardware integrators, the full process to create + * PDS files is described here: + * https:github.com/SiliconLabs/wfx-firmware/blob/master/PDS/README.md + * + * So this function aims to send PDS to the device. However, the PDS file is + * often bigger than Rx buffers of the chip, so it has to be sent in multiple + * parts. + * + * In add, the PDS data cannot be split anywhere. The PDS files contains tree + * structures. Braces are used to enter/leave a level of the tree (in a JSON + * fashion). PDS files can only been split between root nodes. + */ int wfx_send_pds(struct wfx_dev *wdev, u8 *buf, size_t len) { int ret; @@ -220,7 +233,7 @@ static int wfx_send_pdata_pds(struct wfx_dev *wdev) ret = request_firmware(&pds, wdev->pdata.file_pds, wdev->dev); if (ret) { - dev_err(wdev->dev, "can't load PDS file %s\n", + dev_err(wdev->dev, "can't load antenna parameters (PDS file %s). The device may be unstable.\n", wdev->pdata.file_pds); goto err1; } @@ -294,7 +307,7 @@ struct wfx_dev *wfx_init_common(struct device *dev, hw->wiphy->n_iface_combinations = ARRAY_SIZE(wfx_iface_combinations); hw->wiphy->iface_combinations = wfx_iface_combinations; hw->wiphy->bands[NL80211_BAND_2GHZ] = devm_kmalloc(dev, sizeof(wfx_band_2ghz), GFP_KERNEL); - // FIXME: also copy wfx_rates and wfx_2ghz_chantable + /* FIXME: also copy wfx_rates and wfx_2ghz_chantable */ memcpy(hw->wiphy->bands[NL80211_BAND_2GHZ], &wfx_band_2ghz, sizeof(wfx_band_2ghz)); @@ -336,8 +349,9 @@ int wfx_probe(struct wfx_dev *wdev) int err; struct gpio_desc *gpio_saved; - // During first part of boot, gpio_wakeup cannot yet been used. So - // prevent bh() to touch it. + /* During first part of boot, gpio_wakeup cannot yet been used. So + * prevent bh() to touch it. + */ gpio_saved = wdev->pdata.gpio_wakeup; wdev->pdata.gpio_wakeup = NULL; wdev->poll_irq = true; @@ -360,7 +374,7 @@ int wfx_probe(struct wfx_dev *wdev) goto err0; } - // FIXME: fill wiphy::hw_version + /* FIXME: fill wiphy::hw_version */ dev_info(wdev->dev, "started firmware %d.%d.%d \"%s\" (API: %d.%d, keyset: %02X, caps: 0x%.8X)\n", wdev->hw_caps.firmware_major, wdev->hw_caps.firmware_minor, wdev->hw_caps.firmware_build, wdev->hw_caps.firmware_label, @@ -396,7 +410,7 @@ int wfx_probe(struct wfx_dev *wdev) dev_dbg(wdev->dev, "sending configuration file %s\n", wdev->pdata.file_pds); err = wfx_send_pdata_pds(wdev); - if (err < 0) + if (err < 0 && err != -ENOENT) goto err0; wdev->poll_irq = false; @@ -440,6 +454,9 @@ int wfx_probe(struct wfx_dev *wdev) wdev->hw->wiphy->n_addresses = ARRAY_SIZE(wdev->addresses); wdev->hw->wiphy->addresses = wdev->addresses; + if (!wfx_api_older_than(wdev, 3, 8)) + wdev->hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS; + err = ieee80211_register_hw(wdev->hw); if (err) goto err1; |