mt76: connac: move mt76_connac2_load_patch in connac module

Move mt76_connac2_load_patch utility routine in mt76_connac module since
it is shared between mt7921 and mt7915. This is a preliminary patch to
support mt7902e driver.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 113 insertions, 0 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
index 7e21c0dbfd22..a963e51b7271 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
@@ -2919,5 +2919,118 @@ out:
 }
 EXPORT_SYMBOL_GPL(mt76_connac2_load_ram);
 
+static u32 mt76_connac2_get_data_mode(struct mt76_dev *dev, u32 info)
+{
+	u32 mode = DL_MODE_NEED_RSP;
+
+	if (!is_mt7921(dev) || info == PATCH_SEC_NOT_SUPPORT)
+		return mode;
+
+	switch (FIELD_GET(PATCH_SEC_ENC_TYPE_MASK, info)) {
+	case PATCH_SEC_ENC_TYPE_PLAIN:
+		break;
+	case PATCH_SEC_ENC_TYPE_AES:
+		mode |= DL_MODE_ENCRYPT;
+		mode |= FIELD_PREP(DL_MODE_KEY_IDX,
+				(info & PATCH_SEC_ENC_AES_KEY_MASK)) & DL_MODE_KEY_IDX;
+		mode |= DL_MODE_RESET_SEC_IV;
+		break;
+	case PATCH_SEC_ENC_TYPE_SCRAMBLE:
+		mode |= DL_MODE_ENCRYPT;
+		mode |= DL_CONFIG_ENCRY_MODE_SEL;
+		mode |= DL_MODE_RESET_SEC_IV;
+		break;
+	default:
+		dev_err(dev->dev, "Encryption type not support!\n");
+	}
+
+	return mode;
+}
+
+int mt76_connac2_load_patch(struct mt76_dev *dev, const char *fw_name)
+{
+	int i, ret, sem, max_len = mt76_is_sdio(dev) ? 2048 : 4096;
+	const struct mt76_connac2_patch_hdr *hdr;
+	const struct firmware *fw = NULL;
+
+	sem = mt76_connac_mcu_patch_sem_ctrl(dev, true);
+	switch (sem) {
+	case PATCH_IS_DL:
+		return 0;
+	case PATCH_NOT_DL_SEM_SUCCESS:
+		break;
+	default:
+		dev_err(dev->dev, "Failed to get patch semaphore\n");
+		return -EAGAIN;
+	}
+
+	ret = request_firmware(&fw, fw_name, dev->dev);
+	if (ret)
+		goto out;
+
+	if (!fw || !fw->data || fw->size < sizeof(*hdr)) {
+		dev_err(dev->dev, "Invalid firmware\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	hdr = (const void *)fw->data;
+	dev_info(dev->dev, "HW/SW Version: 0x%x, Build Time: %.16s\n",
+		 be32_to_cpu(hdr->hw_sw_ver), hdr->build_date);
+
+	for (i = 0; i < be32_to_cpu(hdr->desc.n_region); i++) {
+		struct mt76_connac2_patch_sec *sec;
+		u32 len, addr, mode;
+		const u8 *dl;
+		u32 sec_info;
+
+		sec = (void *)(fw->data + sizeof(*hdr) + i * sizeof(*sec));
+		if ((be32_to_cpu(sec->type) & PATCH_SEC_TYPE_MASK) !=
+		    PATCH_SEC_TYPE_INFO) {
+			ret = -EINVAL;
+			goto out;
+		}
+
+		addr = be32_to_cpu(sec->info.addr);
+		len = be32_to_cpu(sec->info.len);
+		dl = fw->data + be32_to_cpu(sec->offs);
+		sec_info = be32_to_cpu(sec->info.sec_key_idx);
+		mode = mt76_connac2_get_data_mode(dev, sec_info);
+
+		ret = mt76_connac_mcu_init_download(dev, addr, len, mode);
+		if (ret) {
+			dev_err(dev->dev, "Download request failed\n");
+			goto out;
+		}
+
+		ret = __mt76_mcu_send_firmware(dev, MCU_CMD(FW_SCATTER),
+					       dl, len, max_len);
+		if (ret) {
+			dev_err(dev->dev, "Failed to send patch\n");
+			goto out;
+		}
+	}
+
+	ret = mt76_connac_mcu_start_patch(dev);
+	if (ret)
+		dev_err(dev->dev, "Failed to start patch\n");
+
+out:
+	sem = mt76_connac_mcu_patch_sem_ctrl(dev, false);
+	switch (sem) {
+	case PATCH_REL_SEM_SUCCESS:
+		break;
+	default:
+		ret = -EAGAIN;
+		dev_err(dev->dev, "Failed to release patch semaphore\n");
+		break;
+	}
+
+	release_firmware(fw);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(mt76_connac2_load_patch);
+
 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
 MODULE_LICENSE("Dual BSD/GPL");