diff options
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/bluetooth/Makefile | 1 | ||||
| -rw-r--r-- | drivers/bluetooth/hci_ag6xx.c | 326 | ||||
| -rw-r--r-- | drivers/bluetooth/hci_ldisc.c | 6 | ||||
| -rw-r--r-- | drivers/bluetooth/hci_uart.h | 8 |
5 files changed, 351 insertions, 1 deletions
diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig index ec6af15..cf50fd2 100644 --- a/drivers/bluetooth/Kconfig +++ b/drivers/bluetooth/Kconfig @@ -169,6 +169,17 @@ config BT_HCIUART_QCA Say Y here to compile support for QCA protocol. +config BT_HCIUART_AG6XX + bool "Intel AG6XX protocol support" + depends on BT_HCIUART + select BT_HCIUART_H4 + select BT_INTEL + help + The Intel/AG6XX protocol support enables Bluetooth HCI over serial + port interface for Intel ibt 2.1 Bluetooth controllers. + + Say Y here to compile support for Intel AG6XX protocol. + config BT_HCIBCM203X tristate "HCI BCM203x USB driver" depends on USB diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile index 07c9cf3..9c18939 100644 --- a/drivers/bluetooth/Makefile +++ b/drivers/bluetooth/Makefile @@ -36,6 +36,7 @@ hci_uart-$(CONFIG_BT_HCIUART_3WIRE) += hci_h5.o hci_uart-$(CONFIG_BT_HCIUART_INTEL) += hci_intel.o 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-objs := $(hci_uart-y) ccflags-y += -D__CHECK_ENDIAN__ diff --git a/drivers/bluetooth/hci_ag6xx.c b/drivers/bluetooth/hci_ag6xx.c new file mode 100644 index 0000000..ea65c2d --- /dev/null +++ b/drivers/bluetooth/hci_ag6xx.c @@ -0,0 +1,326 @@ +/* + * + * Bluetooth HCI UART driver for Intel/AG6xx devices + * + * Copyright (C) 2016 Intel Corporation + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/skbuff.h> +#include <linux/firmware.h> +#include <linux/module.h> +#include <linux/tty.h> + +#include <net/bluetooth/bluetooth.h> +#include <net/bluetooth/hci_core.h> + +#include "hci_uart.h" +#include "btintel.h" + +struct ag6xx_data { + struct sk_buff *rx_skb; + struct sk_buff_head txq; +}; + +struct pbn_entry { + __le32 addr; + __le32 plen; + __u8 data[0]; +} __packed; + +static int ag6xx_open(struct hci_uart *hu) +{ + struct ag6xx_data *ag6xx; + + BT_DBG("hu %p", hu); + + ag6xx = kzalloc(sizeof(*ag6xx), GFP_KERNEL); + if (!ag6xx) + return -ENOMEM; + + skb_queue_head_init(&ag6xx->txq); + + hu->priv = ag6xx; + return 0; +} + +static int ag6xx_close(struct hci_uart *hu) +{ + struct ag6xx_data *ag6xx = hu->priv; + + BT_DBG("hu %p", hu); + + skb_queue_purge(&ag6xx->txq); + kfree_skb(ag6xx->rx_skb); + kfree(ag6xx); + + hu->priv = NULL; + return 0; +} + +static int ag6xx_flush(struct hci_uart *hu) +{ + struct ag6xx_data *ag6xx = hu->priv; + + BT_DBG("hu %p", hu); + + skb_queue_purge(&ag6xx->txq); + return 0; +} + +static struct sk_buff *ag6xx_dequeue(struct hci_uart *hu) +{ + struct ag6xx_data *ag6xx = hu->priv; + struct sk_buff *skb; + + skb = skb_dequeue(&ag6xx->txq); + if (!skb) + return skb; + + /* Prepend skb with frame type */ + memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); + return skb; +} + +static int ag6xx_enqueue(struct hci_uart *hu, struct sk_buff *skb) +{ + struct ag6xx_data *ag6xx = hu->priv; + + skb_queue_tail(&ag6xx->txq, skb); + return 0; +} + +static const struct h4_recv_pkt ag6xx_recv_pkts[] = { + { H4_RECV_ACL, .recv = hci_recv_frame }, + { H4_RECV_SCO, .recv = hci_recv_frame }, + { H4_RECV_EVENT, .recv = hci_recv_frame }, +}; + +static int ag6xx_recv(struct hci_uart *hu, const void *data, int count) +{ + struct ag6xx_data *ag6xx = hu->priv; + + if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) + return -EUNATCH; + + ag6xx->rx_skb = h4_recv_buf(hu->hdev, ag6xx->rx_skb, data, count, + ag6xx_recv_pkts, + ARRAY_SIZE(ag6xx_recv_pkts)); + if (IS_ERR(ag6xx->rx_skb)) { + int err = PTR_ERR(ag6xx->rx_skb); + bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); + ag6xx->rx_skb = NULL; + return err; + } + + return count; +} + +static int intel_mem_write(struct hci_dev *hdev, u32 addr, u32 plen, + const void *data) +{ + /* Can write a maximum of 247 bytes per HCI command. + * HCI cmd Header (3), Intel mem write header (6), data (247). + */ + while (plen > 0) { + struct sk_buff *skb; + u8 cmd_param[253], fragment_len = (plen > 247) ? 247 : plen; + __le32 leaddr = cpu_to_le32(addr); + + memcpy(cmd_param, &leaddr, 4); + cmd_param[4] = 0; + cmd_param[5] = fragment_len; + memcpy(cmd_param + 6, data, fragment_len); + + skb = __hci_cmd_sync(hdev, 0xfc8e, fragment_len + 6, cmd_param, + HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) + return PTR_ERR(skb); + kfree_skb(skb); + + plen -= fragment_len; + data += fragment_len; + addr += fragment_len; + } + + return 0; +} + +static int ag6xx_setup(struct hci_uart *hu) +{ + struct hci_dev *hdev = hu->hdev; + struct sk_buff *skb; + struct intel_version ver; + const struct firmware *fw; + const u8 *fw_ptr; + char fwname[64]; + bool patched = false; + int err; + + err = btintel_enter_mfg(hdev); + if (err) + return err; + + err = btintel_read_version(hdev, &ver); + if (err) + return err; + + btintel_version_info(hdev, &ver); + + /* The hardware platform number has a fixed value of 0x37 and + * for now only accept this single value. + */ + if (ver.hw_platform != 0x37) { + bt_dev_err(hdev, "Unsupported Intel hardware platform: 0x%X", + ver.hw_platform); + return -EINVAL; + } + + /* Only the hardware variant iBT 2.1 (AG6XX) is supported by this + * firmware setup method. + */ + if (ver.hw_variant != 0x0a) { + bt_dev_err(hdev, "Unsupported Intel hardware variant: 0x%x", + ver.hw_variant); + return -EINVAL; + } + + snprintf(fwname, sizeof(fwname), "intel/ibt-hw-%x.%x.bddata", + ver.hw_platform, ver.hw_variant); + + err = request_firmware(&fw, fwname, &hdev->dev); + if (err < 0) { + bt_dev_err(hdev, "Failed to open Intel bddata file: %s (%d)", + fwname, err); + goto patch; + } + fw_ptr = fw->data; + + bt_dev_info(hdev, "Applying bddata (%s)", fwname); + + skb = __hci_cmd_sync_ev(hdev, 0xfc2f, fw->size, fw->data, + HCI_EV_CMD_STATUS, HCI_CMD_TIMEOUT); + if (IS_ERR(skb)) { + bt_dev_err(hdev, "Applying bddata failed (%ld)", PTR_ERR(skb)); + release_firmware(fw); + return PTR_ERR(skb); + } + kfree_skb(skb); + + release_firmware(fw); + +patch: + /* If there is no applied patch, fw_patch_num is always 0x00. In other + * cases, current firmware is already patched. No need to patch it. + */ + if (ver.fw_patch_num) { + bt_dev_info(hdev, "Device is already patched. patch num: %02x", + ver.fw_patch_num); + patched = true; + goto complete; + } + + snprintf(fwname, sizeof(fwname), + "intel/ibt-hw-%x.%x.%x-fw-%x.%x.%x.%x.%x.pbn", + ver.hw_platform, ver.hw_variant, ver.hw_revision, + ver.fw_variant, ver.fw_revision, ver.fw_build_num, + ver.fw_build_ww, ver.fw_build_yy); + + err = request_firmware(&fw, fwname, &hdev->dev); + if (err < 0) { + bt_dev_err(hdev, "Failed to open Intel patch file: %s(%d)", + fwname, err); + goto complete; + } + fw_ptr = fw->data; + + bt_dev_info(hdev, "Patching firmware file (%s)", fwname); + + /* PBN patch file contains a list of binary patches to be applied on top + * of the embedded firmware. Each patch entry header contains the target + * address and patch size. + * + * Patch entry: + * | addr(le) | patch_len(le) | patch_data | + * | 4 Bytes | 4 Bytes | n Bytes | + * + * PBN file is terminated by a patch entry whose address is 0xffffffff. + */ + while (fw->size > fw_ptr - fw->data) { + struct pbn_entry *pbn = (void *)fw_ptr; + u32 addr, plen; + + if (pbn->addr == 0xffffffff) { + bt_dev_info(hdev, "Patching complete"); + patched = true; + break; + } + + addr = le32_to_cpu(pbn->addr); + plen = le32_to_cpu(pbn->plen); + + if (fw->data + fw->size <= pbn->data + plen) { + bt_dev_info(hdev, "Invalid patch len (%d)", plen); + break; + } + + bt_dev_info(hdev, "Patching %td/%zu", (fw_ptr - fw->data), + fw->size); + + err = intel_mem_write(hdev, addr, plen, pbn->data); + if (err) { + bt_dev_err(hdev, "Patching failed"); + break; + } + + fw_ptr = pbn->data + plen; + } + + release_firmware(fw); + +complete: + /* Exit manufacturing mode and reset */ + err = btintel_exit_mfg(hdev, true, patched); + + return err; +} + +static const struct hci_uart_proto ag6xx_proto = { + .id = HCI_UART_AG6XX, + .name = "AG6XX", + .manufacturer = 2, + .open = ag6xx_open, + .close = ag6xx_close, + .flush = ag6xx_flush, + .setup = ag6xx_setup, + .recv = ag6xx_recv, + .enqueue = ag6xx_enqueue, + .dequeue = ag6xx_dequeue, +}; + +int __init ag6xx_init(void) +{ + return hci_uart_register_proto(&ag6xx_proto); +} + +int __exit ag6xx_deinit(void) +{ + return hci_uart_unregister_proto(&ag6xx_proto); +} diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c index 73202624..c00168a 100644 --- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -804,6 +804,9 @@ static int __init hci_uart_init(void) #ifdef CONFIG_BT_HCIUART_QCA qca_init(); #endif +#ifdef CONFIG_BT_HCIUART_AG6XX + ag6xx_init(); +#endif return 0; } @@ -836,6 +839,9 @@ static void __exit hci_uart_exit(void) #ifdef CONFIG_BT_HCIUART_QCA qca_deinit(); #endif +#ifdef CONFIG_BT_HCIUART_AG6XX + ag6xx_deinit(); +#endif /* Release tty registration of line discipline */ err = tty_unregister_ldisc(N_HCI); diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h index 82c92f1..4814ff0 100644 --- a/drivers/bluetooth/hci_uart.h +++ b/drivers/bluetooth/hci_uart.h @@ -35,7 +35,7 @@ #define HCIUARTGETFLAGS _IOR('U', 204, int) /* UART protocols */ -#define HCI_UART_MAX_PROTO 9 +#define HCI_UART_MAX_PROTO 10 #define HCI_UART_H4 0 #define HCI_UART_BCSP 1 @@ -46,6 +46,7 @@ #define HCI_UART_INTEL 6 #define HCI_UART_BCM 7 #define HCI_UART_QCA 8 +#define HCI_UART_AG6XX 9 #define HCI_UART_RAW_DEVICE 0 #define HCI_UART_RESET_ON_INIT 1 @@ -182,3 +183,8 @@ int bcm_deinit(void); int qca_init(void); int qca_deinit(void); #endif + +#ifdef CONFIG_BT_HCIUART_AG6XX +int ag6xx_init(void); +int ag6xx_deinit(void); +#endif |
