From patchwork Fri Aug 2 09:39:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Li via B4 Relay X-Patchwork-Id: 816535 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 730711C2BD; Fri, 2 Aug 2024 09:40:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722591625; cv=none; b=oEcLk1buOh7giQdUYNzLIfejnm3SG3u7M8BxCihv7GopBMd3lih1bmMsdYsLy1HHEQ0NjeRHqZcQMR+xXqQ3pXa4wxoZLFNfibKNyQiWKuc3I4EHzTz98yAVH0wkeTQf3FoSr3Lb33lxa+4upQBddKOnXWBXOA4q9G7GJsB27P0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722591625; c=relaxed/simple; bh=lumRlZy1Z5Bxh8D+83VDcPelMYlM6VCpEqIPbk8+iI0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ChQTpIjrzweH2ov8cLr3kQJOQG6h0AnOqYBXdod7xaernTePOxcR5EReAAfp9+xDrqS6yqfE5Ho2byrpW1ySnHdQzUmdFRcIH6VHPmEjIsW8O3l18uhhvJXqS3sG41oeiyDjlD/PGqfYFdnn8jftwi0Vdt43DDbqGPb+qy/71n4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nXyADRRB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="nXyADRRB" Received: by smtp.kernel.org (Postfix) with ESMTPS id 13539C4AF0A; Fri, 2 Aug 2024 09:40:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722591625; bh=lumRlZy1Z5Bxh8D+83VDcPelMYlM6VCpEqIPbk8+iI0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=nXyADRRBBcN3g/tbqW1slQcAuRaZTq5+ol6nysCHOGvmltqbOW96vSAmin783a5CG k+otBztOWd6O5sNyMwjn2CDt7qLqWWchOd381mGgyJxB+kplnYVNPkj3r9BO2uxelX LUOBv2gLQiWac66jEzrK+ydPg1Ciks0tpOqLDTAAbb8rBiKTz1e+FAwgEve3dIzNe1 QuS5WR2cUTXl1co5HAWe026DD4ih6Z2qQIK0GkC5Pg/w15MMzao9EKQ3ysmVZwD2sG UoV1YGRY7owQ38Sm/NzGFSZOfW7+fV2Ne62uoB7gW45BPiRNlsTVvRAirOdIOu81Mc pEoS40qvrfzng== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id EFC1BC3DA49; Fri, 2 Aug 2024 09:40:24 +0000 (UTC) From: Yang Li via B4 Relay Date: Fri, 02 Aug 2024 17:39:48 +0800 Subject: [PATCH v3 2/3] Bluetooth: hci_uart: Add support for Amlogic HCI UART Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240802-btaml-v3-2-d8110bf9963f@amlogic.com> References: <20240802-btaml-v3-0-d8110bf9963f@amlogic.com> In-Reply-To: <20240802-btaml-v3-0-d8110bf9963f@amlogic.com> To: Marcel Holtmann , Luiz Augusto von Dentz , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Catalin Marinas , Will Deacon Cc: linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Yang Li , Ye He X-Mailer: b4 0.13-dev-f0463 X-Developer-Signature: v=1; a=ed25519-sha256; t=1722591623; l=22544; i=yang.li@amlogic.com; s=20240418; h=from:subject:message-id; bh=R2BiOibI0bZj5IIlelLTDSkH2gAfT+QoITyuhmKuTsA=; b=JU/O/JfvPlVUdpviVobYVdivsMSaST1iS3DWLTAY94J8jE59oegicY+r7gX7XSWL0G+LsWzpe qbopqILBAx1BKifzgLWs12m5kVu/UGiN5lNHgS3VUr4xsaPFPbQr2Mn X-Developer-Key: i=yang.li@amlogic.com; a=ed25519; pk=86OaNWMr3XECW9HGNhkJ4HdR2eYA5SEAegQ3td2UCCs= X-Endpoint-Received: by B4 Relay for yang.li@amlogic.com/20240418 with auth_id=180 X-Original-From: Yang Li Reply-To: yang.li@amlogic.com From: Yang Li Add support for Amlogic Bluetooth controller over HCI UART. In order to send the final firmware at full speed(4Mbps). Co-developed-by: Ye He Signed-off-by: Ye He Signed-off-by: Yang Li --- drivers/bluetooth/Kconfig | 12 + drivers/bluetooth/Makefile | 1 + drivers/bluetooth/hci_aml.c | 756 ++++++++++++++++++++++++++++++++++++++++++ drivers/bluetooth/hci_ldisc.c | 8 +- drivers/bluetooth/hci_uart.h | 8 +- 5 files changed, 782 insertions(+), 3 deletions(-) diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig index 769fa288179d..18767b54df35 100644 --- a/drivers/bluetooth/Kconfig +++ b/drivers/bluetooth/Kconfig @@ -274,6 +274,18 @@ config BT_HCIUART_MRVL Say Y here to compile support for HCI MRVL protocol. +config BT_HCIUART_AML + bool "Amlogic protocol support" + depends on BT_HCIUART + depends on BT_HCIUART_SERDEV + select BT_HCIUART_H4 + select FW_LOADER + help + The Amlogic protocol support enables Bluetooth HCI over serial + port interface for Amlogic Bluetooth controllers. + + Say Y here to compile support for HCI AML protocol. + config BT_HCIBCM203X tristate "HCI BCM203x USB driver" depends on USB diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile index 0730d6684d1a..81856512ddd0 100644 --- a/drivers/bluetooth/Makefile +++ b/drivers/bluetooth/Makefile @@ -51,4 +51,5 @@ hci_uart-$(CONFIG_BT_HCIUART_BCM) += hci_bcm.o hci_uart-$(CONFIG_BT_HCIUART_QCA) += hci_qca.o hci_uart-$(CONFIG_BT_HCIUART_AG6XX) += hci_ag6xx.o hci_uart-$(CONFIG_BT_HCIUART_MRVL) += hci_mrvl.o +hci_uart-$(CONFIG_BT_HCIUART_AML) += hci_aml.o hci_uart-objs := $(hci_uart-y) diff --git a/drivers/bluetooth/hci_aml.c b/drivers/bluetooth/hci_aml.c new file mode 100644 index 000000000000..cc6627788611 --- /dev/null +++ b/drivers/bluetooth/hci_aml.c @@ -0,0 +1,756 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR MIT) +/* + * Copyright (C) 2024 Amlogic, Inc. All rights reserved + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "hci_uart.h" + +#define AML_EVT_HEAD_SIZE 4 +#define AML_BDADDR_DEFAULT (&(bdaddr_t) {{ 0x00, 0xff, 0x00, 0x22, 0x2d, 0xae }}) + +#define AML_FIRMWARE_OPERATION_SIZE (248) +#define AML_FIRMWARE_MAX_SIZE (512 * 1024) + +/* TCI command */ +#define AML_TCI_CMD_READ 0xFEF0 +#define AML_TCI_CMD_WRITE 0xFEF1 +#define AML_TCI_CMD_UPDATE_BAUDRATE 0xFEF2 +#define AML_TCI_CMD_HARDWARE_RESET 0xFEF2 +#define AML_TCI_CMD_DOWNLOAD_BT_FW 0xFEF3 +#define AML_BT_HCI_VENDOR_CMD 0xFC1A + +/* TCI operation parameter in controller chip */ +#define AML_OP_UART_MODE 0x00A30128 +#define AML_OP_EVT_ENABLE 0x00A70014 +#define AML_OP_MEM_HARD_TRANS_EN 0x00A7000C +#define AML_OP_RF_CFG 0x00F03040 +#define AML_OP_RAM_POWER_CTR 0x00F03050 +#define AML_OP_HARDWARE_RST 0x00F03058 +#define AML_OP_ICCM_RAM_BASE 0x00000000 +#define AML_OP_DCCM_RAM_BASE 0x00D00000 + +/* UART configuration */ +#define AML_UART_XMIT_EN BIT(12) +#define AML_UART_RECV_EN BIT(13) +#define AML_UART_TIMEOUT_INT_EN BIT(14) +#define AML_UART_CLK_SOURCE 40000000 + +/* Controller event */ +#define AML_EVT_EN BIT(24) + +/* RAM power control */ +#define AML_RAM_POWER_ON (0) +#define AML_RAM_POWER_OFF (1) + +/* RF configuration */ +#define AML_RF_ANT_SINGLE BIT(28) +#define AML_RF_ANT_DOUBLE BIT(29) + +/* Memory transaction */ +#define AML_MM_CTR_HARD_TRAS_EN BIT(27) + +/* Controller reset */ +#define AML_CTR_CPU_RESET BIT(8) +#define AML_CTR_MAC_RESET BIT(9) +#define AML_CTR_PHY_RESET BIT(10) + +enum { + FW_ICCM, + FW_DCCM +}; + +struct aml_fw_len { + u32 iccm_len; + u32 dccm_len; +}; + +struct aml_tci_rsp { + u8 num_cmd_packet; + u16 opcode; + u8 status; +} __packed; + +struct aml_device_data { + int iccm_offset; + int dccm_offset; + bool is_coex; +}; + +struct aml_serdev { + struct hci_uart serdev_hu; + struct device *dev; + struct gpio_desc *bt_en_gpio; + struct regulator *bt_supply; + struct clk *lpo_clk; + const struct aml_device_data *aml_dev_data; + const char *firmware_name; +}; + +struct aml_data { + struct sk_buff *rx_skb; + struct sk_buff_head txq; +}; + +static const struct h4_recv_pkt aml_recv_pkts[] = { + { H4_RECV_ACL, .recv = hci_recv_frame }, + { H4_RECV_SCO, .recv = hci_recv_frame }, + { H4_RECV_EVENT, .recv = hci_recv_frame }, + { H4_RECV_ISO, .recv = hci_recv_frame }, +}; + +/* The TCI command is private command, which is used to configure before BT + * chip startup, contains update baudrate, update firmware, set public addr. + * + * op_code | op_len | op_addr | parameter | + * --------|-----------------------|---------|-------------| + * 2B | 1B len(addr+param) | 4B | len(param) | + */ +static int aml_send_tci_cmd(struct hci_dev *hdev, u16 op_code, u32 op_addr, + u32 *param, u32 param_len) +{ + struct aml_tci_rsp *rsp = NULL; + struct sk_buff *skb = NULL; + u32 buf_len = 0; + u8 *buf = NULL; + int err = 0; + + buf_len = sizeof(op_addr) + param_len; + buf = kmalloc(buf_len, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + memcpy(buf, &op_addr, sizeof(op_addr)); + if (param && param_len > 0) + memcpy(buf + sizeof(op_addr), param, param_len); + + skb = __hci_cmd_sync_ev(hdev, op_code, buf_len, buf, + HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) { + err = PTR_ERR(skb); + bt_dev_err(hdev, "Failed to send TCI cmd:(%d)", err); + goto exit; + } + + rsp = skb_pull_data(skb, sizeof(struct aml_tci_rsp)); + if (!rsp) + goto skb_free; + + if (rsp->opcode != op_code || rsp->status != 0x00) { + bt_dev_err(hdev, "send TCI cmd(0x%04X), response(0x%04X):(%d)", + op_code, rsp->opcode, rsp->status); + err = -EINVAL; + goto skb_free; + } + +skb_free: + kfree_skb(skb); + +exit: + kfree(buf); + return err; +} + +static int aml_update_chip_baudrate(struct hci_dev *hdev, u32 baud) +{ + u32 value; + + value = ((AML_UART_CLK_SOURCE / baud) - 1) & 0x0FFF; + value |= AML_UART_XMIT_EN | AML_UART_RECV_EN | AML_UART_TIMEOUT_INT_EN; + + return aml_send_tci_cmd(hdev, AML_TCI_CMD_UPDATE_BAUDRATE, + AML_OP_UART_MODE, &value, sizeof(value)); +} + +static int aml_start_chip(struct hci_dev *hdev) +{ + u32 value = 0; + int ret; + + value = AML_MM_CTR_HARD_TRAS_EN; + ret = aml_send_tci_cmd(hdev, AML_TCI_CMD_WRITE, + AML_OP_MEM_HARD_TRANS_EN, + &value, sizeof(value)); + if (ret) + return ret; + + /* controller hardware reset. */ + value = AML_CTR_CPU_RESET | AML_CTR_MAC_RESET | AML_CTR_PHY_RESET; + ret = aml_send_tci_cmd(hdev, AML_TCI_CMD_HARDWARE_RESET, + AML_OP_HARDWARE_RST, + &value, sizeof(value)); + return ret; +} + +static int aml_send_firmware_segment(struct hci_dev *hdev, + u8 fw_type, + u8 *seg, + u32 seg_size, + u32 offset) +{ + u32 op_addr = 0; + + if (fw_type == FW_ICCM) + op_addr = AML_OP_ICCM_RAM_BASE + offset; + else if (fw_type == FW_DCCM) + op_addr = AML_OP_DCCM_RAM_BASE + offset; + + return aml_send_tci_cmd(hdev, AML_TCI_CMD_DOWNLOAD_BT_FW, + op_addr, (u32 *)seg, seg_size); +} + +static int aml_send_firmware(struct hci_dev *hdev, u8 fw_type, + u8 *fw, u32 fw_size, u32 offset) +{ + u32 seg_size = 0; + u32 seg_off = 0; + + if (fw_size > AML_FIRMWARE_MAX_SIZE) { + bt_dev_err(hdev, "fw_size error, fw_size:%d, max_size: 512K", + fw_size); + return -EINVAL; + } + while (fw_size > 0) { + seg_size = (fw_size > AML_FIRMWARE_OPERATION_SIZE) ? + AML_FIRMWARE_OPERATION_SIZE : fw_size; + if (aml_send_firmware_segment(hdev, fw_type, (fw + seg_off), + seg_size, offset)) { + bt_dev_err(hdev, "Failed send firmware, type:%d, offset:0x%x", + fw_type, offset); + return -EINVAL; + } + seg_off += seg_size; + fw_size -= seg_size; + offset += seg_size; + } + return 0; +} + +static int aml_download_firmware(struct hci_dev *hdev, const char *fw_name) +{ + struct hci_uart *hu = hci_get_drvdata(hdev); + struct aml_serdev *amldev = serdev_device_get_drvdata(hu->serdev); + const struct firmware *firmware = NULL; + struct aml_fw_len *fw_len = NULL; + u8 *iccm_start = NULL, *dccm_start = NULL; + u32 iccm_len, dccm_len; + u32 value = 0; + int ret = 0; + + /* Enable firmware download event. */ + value = AML_EVT_EN; + ret = aml_send_tci_cmd(hdev, AML_TCI_CMD_WRITE, + AML_OP_EVT_ENABLE, + &value, sizeof(value)); + if (ret) + goto exit; + + /* RAM power on */ + value = AML_RAM_POWER_ON; + ret = aml_send_tci_cmd(hdev, AML_TCI_CMD_WRITE, + AML_OP_RAM_POWER_CTR, + &value, sizeof(value)); + if (ret) + goto exit; + + /* Check RAM power status */ + ret = aml_send_tci_cmd(hdev, AML_TCI_CMD_READ, + AML_OP_RAM_POWER_CTR, NULL, 0); + if (ret) + goto exit; + + ret = request_firmware(&firmware, fw_name, &hdev->dev); + if (ret < 0) { + bt_dev_err(hdev, "Failed to load <%s>:(%d)", fw_name, ret); + goto exit; + } + + fw_len = (struct aml_fw_len *)firmware->data; + + /* Download ICCM */ + iccm_start = (u8 *)(firmware->data) + sizeof(struct aml_fw_len) + + amldev->aml_dev_data->iccm_offset; + iccm_len = fw_len->iccm_len - amldev->aml_dev_data->iccm_offset; + ret = aml_send_firmware(hdev, FW_ICCM, iccm_start, iccm_len, + amldev->aml_dev_data->iccm_offset); + if (ret) { + bt_dev_err(hdev, "Failed to send FW_ICCM (%d)", ret); + goto exit; + } + + /* Download DCCM */ + dccm_start = (u8 *)(firmware->data) + sizeof(struct aml_fw_len) + fw_len->iccm_len; + dccm_len = fw_len->dccm_len; + ret = aml_send_firmware(hdev, FW_DCCM, dccm_start, dccm_len, + amldev->aml_dev_data->dccm_offset); + if (ret) { + bt_dev_err(hdev, "Failed to send FW_DCCM (%d)", ret); + goto exit; + } + + /* Disable firmware download event. */ + value = 0; + ret = aml_send_tci_cmd(hdev, AML_TCI_CMD_WRITE, + AML_OP_EVT_ENABLE, + &value, sizeof(value)); + if (ret) + goto exit; + +exit: + if (firmware) + release_firmware(firmware); + return ret; +} + +static int aml_send_reset(struct hci_dev *hdev) +{ + struct sk_buff *skb; + int err; + + skb = __hci_cmd_sync_ev(hdev, HCI_OP_RESET, 0, NULL, + HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) { + err = PTR_ERR(skb); + bt_dev_err(hdev, "Failed to send hci reset cmd(%d)", err); + return err; + } + + kfree_skb(skb); + return 0; +} + +static int aml_dump_fw_version(struct hci_dev *hdev) +{ + struct aml_tci_rsp *rsp = NULL; + struct sk_buff *skb; + u8 value[6] = {0}; + u8 *fw_ver = NULL; + int err = 0; + + skb = __hci_cmd_sync_ev(hdev, AML_BT_HCI_VENDOR_CMD, sizeof(value), value, + HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) { + err = PTR_ERR(skb); + bt_dev_err(hdev, "Failed get fw version:(%d)", err); + return err; + } + + rsp = skb_pull_data(skb, sizeof(struct aml_tci_rsp)); + if (!rsp) + goto exit; + + if (rsp->opcode != AML_BT_HCI_VENDOR_CMD || rsp->status != 0x00) { + bt_dev_err(hdev, "dump version, error response (0x%04X):(%d)", + rsp->opcode, rsp->status); + err = -EINVAL; + goto exit; + } + + fw_ver = (u8 *)rsp + AML_EVT_HEAD_SIZE; + bt_dev_info(hdev, "fw_version: date = %02x.%02x, number = 0x%02x%02x", + *(fw_ver + 1), *fw_ver, *(fw_ver + 3), *(fw_ver + 2)); + +exit: + kfree_skb(skb); + return err; +} + +static int aml_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) +{ + struct aml_tci_rsp *rsp = NULL; + struct sk_buff *skb; + int err = 0; + + bt_dev_info(hdev, "set bdaddr (%pM)", bdaddr); + skb = __hci_cmd_sync_ev(hdev, AML_BT_HCI_VENDOR_CMD, + sizeof(bdaddr_t), bdaddr, + HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) { + err = PTR_ERR(skb); + bt_dev_err(hdev, "Failed to set bdaddr:(%d)", err); + return err; + } + + rsp = skb_pull_data(skb, sizeof(struct aml_tci_rsp)); + if (!rsp) + goto exit; + + if (rsp->opcode != AML_BT_HCI_VENDOR_CMD || rsp->status != 0x00) { + bt_dev_err(hdev, "error response (0x%x):(%d)", rsp->opcode, rsp->status); + err = -EINVAL; + goto exit; + } + +exit: + kfree_skb(skb); + return err; +} + +static int aml_check_bdaddr(struct hci_dev *hdev) +{ + struct hci_rp_read_bd_addr *paddr; + struct sk_buff *skb; + int err; + + if (bacmp(&hdev->public_addr, BDADDR_ANY)) + return 0; + + skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL, + HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) { + err = PTR_ERR(skb); + bt_dev_err(hdev, "Failed to read bdaddr:(%d)", err); + return err; + } + + paddr = skb_pull_data(skb, sizeof(struct hci_rp_read_bd_addr)); + if (!paddr) + goto exit; + + if (!bacmp(&paddr->bdaddr, AML_BDADDR_DEFAULT)) { + bt_dev_info(hdev, "amlbt using default bdaddr (%pM)", &paddr->bdaddr); + set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks); + } + +exit: + kfree_skb(skb); + return 0; +} + +static int aml_config_rf(struct hci_dev *hdev, bool is_coex) +{ + u32 value = AML_RF_ANT_DOUBLE; + + /* Use a single antenna when co-existing with wifi. */ + if (is_coex) + value = AML_RF_ANT_SINGLE; + + return aml_send_tci_cmd(hdev, AML_TCI_CMD_WRITE, + AML_OP_RF_CFG, + &value, sizeof(value)); +} + +static int aml_parse_dt(struct aml_serdev *amldev) +{ + struct device *pdev = amldev->dev; + + amldev->bt_en_gpio = devm_gpiod_get(pdev, "enable", + GPIOD_OUT_LOW); + if (IS_ERR(amldev->bt_en_gpio)) { + dev_err(pdev, "Failed to acquire enable gpios"); + return PTR_ERR(amldev->bt_en_gpio); + } + + if (device_property_read_string(pdev, "firmware-name", + &amldev->firmware_name)) { + dev_err(pdev, "Failed to acquire firmware path"); + return -ENODEV; + } + + amldev->bt_supply = devm_regulator_get(pdev, "vddio"); + if (IS_ERR(amldev->bt_supply)) { + dev_err(pdev, "Failed to acquire regulator"); + return PTR_ERR(amldev->bt_supply); + } + + amldev->lpo_clk = devm_clk_get(pdev, NULL); + if (IS_ERR(amldev->lpo_clk)) { + dev_err(pdev, "Failed to acquire clock source"); + return PTR_ERR(amldev->lpo_clk); + } + + return 0; +} + +static int aml_power_on(struct aml_serdev *amldev) +{ + int err; + + err = regulator_enable(amldev->bt_supply); + if (err) { + dev_err(amldev->dev, "Failed to enable regulator: (%d)", err); + return err; + } + + err = clk_prepare_enable(amldev->lpo_clk); + if (err) { + dev_err(amldev->dev, "Failed to enable lpo clock: (%d)", err); + return err; + } + + gpiod_set_value_cansleep(amldev->bt_en_gpio, 1); + + /* wait 100ms for bluetooth controller power on */ + msleep(100); + return 0; +} + +static int aml_power_off(struct aml_serdev *amldev) +{ + gpiod_set_value_cansleep(amldev->bt_en_gpio, 0); + + clk_disable_unprepare(amldev->lpo_clk); + + regulator_disable(amldev->bt_supply); + + return 0; +} + +static int aml_set_baudrate(struct hci_uart *hu, unsigned int speed) +{ + /* update controller baudrate*/ + if (aml_update_chip_baudrate(hu->hdev, speed) != 0) { + bt_dev_err(hu->hdev, "Failed to update baud rate"); + return -EINVAL; + } + + /* update local baudrate*/ + serdev_device_set_baudrate(hu->serdev, speed); + + return 0; +} + +/* Initialize protocol */ +static int aml_open(struct hci_uart *hu) +{ + struct aml_serdev *amldev = serdev_device_get_drvdata(hu->serdev); + struct aml_data *aml_data; + int err; + + err = aml_parse_dt(amldev); + if (err) + return err; + + if (!hci_uart_has_flow_control(hu)) { + bt_dev_err(hu->hdev, "no flow control"); + return -EOPNOTSUPP; + } + + aml_data = kzalloc(sizeof(*aml_data), GFP_KERNEL); + if (!aml_data) + return -ENOMEM; + + skb_queue_head_init(&aml_data->txq); + + hu->priv = aml_data; + + return 0; +} + +static int aml_close(struct hci_uart *hu) +{ + struct aml_serdev *amldev = serdev_device_get_drvdata(hu->serdev); + struct aml_data *aml_data = hu->priv; + + if (hu->serdev) + serdev_device_close(hu->serdev); + + skb_queue_purge(&aml_data->txq); + kfree_skb(aml_data->rx_skb); + kfree(aml_data); + + hu->priv = NULL; + + return aml_power_off(amldev); +} + +static int aml_flush(struct hci_uart *hu) +{ + struct aml_data *aml_data = hu->priv; + + skb_queue_purge(&aml_data->txq); + + return 0; +} + +static int aml_setup(struct hci_uart *hu) +{ + struct aml_serdev *amldev = serdev_device_get_drvdata(hu->serdev); + struct hci_dev *hdev = amldev->serdev_hu.hdev; + int err; + + /* Setup bdaddr */ + hdev->set_bdaddr = aml_set_bdaddr; + + err = aml_power_on(amldev); + if (err) + return err; + + err = aml_set_baudrate(hu, amldev->serdev_hu.proto->oper_speed); + if (err) + return err; + + err = aml_download_firmware(hdev, amldev->firmware_name); + if (err) + return err; + + err = aml_config_rf(hdev, amldev->aml_dev_data->is_coex); + if (err) + return err; + + err = aml_start_chip(hdev); + if (err) + return err; + + /* wait 350ms for controller start up*/ + msleep(350); + + err = aml_dump_fw_version(hdev); + if (err) + return err; + + err = aml_send_reset(hdev); + if (err) + return err; + + err = aml_check_bdaddr(hdev); + if (err) + return err; + + return 0; +} + +static int aml_enqueue(struct hci_uart *hu, struct sk_buff *skb) +{ + struct aml_data *aml_data = hu->priv; + + skb_queue_tail(&aml_data->txq, skb); + + return 0; +} + +static struct sk_buff *aml_dequeue(struct hci_uart *hu) +{ + struct aml_data *aml_data = hu->priv; + struct sk_buff *skb; + + skb = skb_dequeue(&aml_data->txq); + + /* Prepend skb with frame type */ + if (skb) + memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); + + return skb; +} + +static int aml_recv(struct hci_uart *hu, const void *data, int count) +{ + struct aml_data *aml_data = hu->priv; + int err; + + aml_data->rx_skb = h4_recv_buf(hu->hdev, aml_data->rx_skb, data, count, + aml_recv_pkts, + ARRAY_SIZE(aml_recv_pkts)); + if (IS_ERR(aml_data->rx_skb)) { + err = PTR_ERR(aml_data->rx_skb); + bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); + aml_data->rx_skb = NULL; + return err; + } + + return count; +} + +static const struct hci_uart_proto aml_hci_proto = { + .id = HCI_UART_AML, + .name = "AML", + .manufacturer = 50, + .init_speed = 115200, + .oper_speed = 4000000, + .open = aml_open, + .close = aml_close, + .setup = aml_setup, + .flush = aml_flush, + .recv = aml_recv, + .enqueue = aml_enqueue, + .dequeue = aml_dequeue, +}; + +static void aml_device_driver_shutdown(struct device *dev) +{ + struct aml_serdev *amldev = dev_get_drvdata(dev); + + aml_power_off(amldev); +} + +static int aml_serdev_probe(struct serdev_device *serdev) +{ + struct aml_serdev *amldev; + int err; + + amldev = devm_kzalloc(&serdev->dev, sizeof(*amldev), GFP_KERNEL); + if (!amldev) + return -ENOMEM; + + amldev->serdev_hu.serdev = serdev; + amldev->dev = &serdev->dev; + serdev_device_set_drvdata(serdev, amldev); + + err = hci_uart_register_device(&amldev->serdev_hu, &aml_hci_proto); + if (err) + return dev_err_probe(amldev->dev, err, + "Failed to register hci uart device"); + + amldev->aml_dev_data = device_get_match_data(&serdev->dev); + + return 0; +} + +static void aml_serdev_remove(struct serdev_device *serdev) +{ + struct aml_serdev *amldev = serdev_device_get_drvdata(serdev); + + hci_uart_unregister_device(&amldev->serdev_hu); +} + +static const struct aml_device_data data_w155s2 = { + .iccm_offset = 256 * 1024, +}; + +static const struct aml_device_data data_w265s2 = { + .iccm_offset = 384 * 1024, +}; + +static const struct of_device_id aml_bluetooth_of_match[] = { + { .compatible = "amlogic,w155s2-bt", .data = &data_w155s2 }, + { .compatible = "amlogic,w265s2-bt", .data = &data_w265s2 }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, aml_bluetooth_of_match); + +static struct serdev_device_driver aml_serdev_driver = { + .probe = aml_serdev_probe, + .remove = aml_serdev_remove, + .driver = { + .name = "hci_uart_aml", + .of_match_table = aml_bluetooth_of_match, + .shutdown = aml_device_driver_shutdown, + }, +}; + +int __init aml_init(void) +{ + serdev_device_driver_register(&aml_serdev_driver); + + return hci_uart_register_proto(&aml_hci_proto); +} + +int __exit aml_deinit(void) +{ + serdev_device_driver_unregister(&aml_serdev_driver); + + return hci_uart_unregister_proto(&aml_hci_proto); +} diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c index 30192bb08354..d307c41a5470 100644 --- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -870,7 +870,9 @@ static int __init hci_uart_init(void) #ifdef CONFIG_BT_HCIUART_MRVL mrvl_init(); #endif - +#ifdef CONFIG_BT_HCIUART_AML + aml_init(); +#endif return 0; } @@ -906,7 +908,9 @@ static void __exit hci_uart_exit(void) #ifdef CONFIG_BT_HCIUART_MRVL mrvl_deinit(); #endif - +#ifdef CONFIG_BT_HCIUART_AML + aml_deinit(); +#endif tty_unregister_ldisc(&hci_uart_ldisc); } diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h index 00bf7ae82c5b..fbf3079b92a5 100644 --- a/drivers/bluetooth/hci_uart.h +++ b/drivers/bluetooth/hci_uart.h @@ -20,7 +20,7 @@ #define HCIUARTGETFLAGS _IOR('U', 204, int) /* UART protocols */ -#define HCI_UART_MAX_PROTO 12 +#define HCI_UART_MAX_PROTO 13 #define HCI_UART_H4 0 #define HCI_UART_BCSP 1 @@ -34,6 +34,7 @@ #define HCI_UART_AG6XX 9 #define HCI_UART_NOKIA 10 #define HCI_UART_MRVL 11 +#define HCI_UART_AML 12 #define HCI_UART_RAW_DEVICE 0 #define HCI_UART_RESET_ON_INIT 1 @@ -209,3 +210,8 @@ int ag6xx_deinit(void); int mrvl_init(void); int mrvl_deinit(void); #endif + +#ifdef CONFIG_BT_HCIUART_AML +int aml_init(void); +int aml_deinit(void); +#endif