Re: [PATCH v9 05/24] wfx: add main.c/main.h

Jérôme Pouiller
2022-01-26T08:20:16Z

Hi Kalle,

On Tuesday 11 January 2022 18:14:05 CET Jerome Pouiller wrote:
> From: Jérôme Pouiller <jerome.pouiller@silabs.com>
>
> Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
> ---
> drivers/net/wireless/silabs/wfx/main.c | 485 +++++++++++++++++++++++++
> drivers/net/wireless/silabs/wfx/main.h | 42 +++
> 2 files changed, 527 insertions(+)
> create mode 100644 drivers/net/wireless/silabs/wfx/main.c
> create mode 100644 drivers/net/wireless/silabs/wfx/main.h
>
[...]
> +/* 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
> + *
> + * The PDS file is an array of Time-Length-Value structs.
> + */
> + int wfx_send_pds(struct wfx_dev *wdev, u8 *buf, size_t len)
> +{
> + int ret, chunk_type, chunk_len, chunk_num = 0;
> +
> + if (*buf == '{') {
> + dev_err(wdev->dev, "PDS: malformed file (legacy format?)\n");
> + return -EINVAL;
> + }
> + while (len > 0) {
> + chunk_type = get_unaligned_le16(buf + 0);
> + chunk_len = get_unaligned_le16(buf + 2);
> + if (chunk_len > len) {
> + dev_err(wdev->dev, "PDS:%d: corrupted file\n", chunk_num);
> + return -EINVAL;
> + }
> + if (chunk_type != WFX_PDS_TLV_TYPE) {
> + dev_info(wdev->dev, "PDS:%d: skip unknown data\n", chunk_num);
> + goto next;
> + }
> + if (chunk_len > WFX_PDS_MAX_CHUNK_SIZE)
> + dev_warn(wdev->dev, "PDS:%d: unexpectly large chunk\n", chunk_num);
> + if (buf[4] != '{' || buf[chunk_len - 1] != '}')
> + dev_warn(wdev->dev, "PDS:%d: unexpected content\n", chunk_num);
> +
> + ret = wfx_hif_configuration(wdev, buf + 4, chunk_len - 4);
> + if (ret > 0) {
> + dev_err(wdev->dev, "PDS:%d: invalid data (unsupported options?)\n",
> + chunk_num);
> + return -EINVAL;
> + }
> + if (ret == -ETIMEDOUT) {
> + dev_err(wdev->dev, "PDS:%d: chip didn't reply (corrupted file?)\n",
> + chunk_num);
> + return ret;
> + }
> + if (ret) {
> + dev_err(wdev->dev, "PDS:%d: chip returned an unknown error\n", chunk_num);
> + return -EIO;
> + }
> +next:
> + chunk_num++;
> + len -= chunk_len;
> + buf += chunk_len;
> + }
> + return 0;
> +}

Kalle, is this function what you expected? If it is right for you, I am
going to send it to the staging tree.

--
Jérôme Pouiller