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Message-Id: <20221027150822.26120-8-sven@svenpeter.dev>
Date: Thu, 27 Oct 2022 17:08:22 +0200
From: Sven Peter <sven@...npeter.dev>
To: Marcel Holtmann <marcel@...tmann.org>,
Johan Hedberg <johan.hedberg@...il.com>,
Luiz Augusto von Dentz <luiz.dentz@...il.com>
Cc: Sven Peter <sven@...npeter.dev>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Paolo Abeni <pabeni@...hat.com>,
Rob Herring <robh+dt@...nel.org>,
Hector Martin <marcan@...can.st>,
Alyssa Rosenzweig <alyssa@...enzweig.io>,
asahi@...ts.linux.dev, netdev@...r.kernel.org,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 7/7] Bluetooth: hci_bcm4377: Add new driver for BCM4377 PCIe boards
Broadcom BCM4377/4378/4387 are dual WiFi/Bluetooth boards found in Apple
machines. This driver adds support for the Bluetooth function which
exposes a shared memory IPC protocol over PCIe to tunnel HCI traffic.
Signed-off-by: Sven Peter <sven@...npeter.dev>
---
MAINTAINERS | 1 +
drivers/bluetooth/Kconfig | 12 +
drivers/bluetooth/Makefile | 1 +
drivers/bluetooth/hci_bcm4377.c | 2514 +++++++++++++++++++++++++++++++
4 files changed, 2528 insertions(+)
create mode 100644 drivers/bluetooth/hci_bcm4377.c
diff --git a/MAINTAINERS b/MAINTAINERS
index ca45551220f5..82828ef36f85 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1911,6 +1911,7 @@ F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml
F: Documentation/devicetree/bindings/power/apple*
F: Documentation/devicetree/bindings/watchdog/apple,wdt.yaml
F: arch/arm64/boot/dts/apple/
+F: drivers/bluetooth/hci_bcm4377.c
F: drivers/clk/clk-apple-nco.c
F: drivers/dma/apple-admac.c
F: drivers/i2c/busses/i2c-pasemi-core.c
diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index e30707405455..71732e51516f 100644
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -274,6 +274,18 @@ config BT_HCIBCM203X
Say Y here to compile support for HCI BCM203x devices into the
kernel or say M to compile it as module (bcm203x).
+
+config BT_HCIBCM4377
+ tristate "HCI BCM4377/4378/4387 PCIe driver"
+ depends on PCI
+ select FW_LOADER
+ help
+ Support for Broadcom BCM4377/4378/4387 Bluetooth chipsets attached via
+ PCIe. These are usually found in Apple machines.
+
+ Say Y here to compile support for HCI BCM4377 family devices into the
+ kernel or say M to compile it as module (hci_bcm4377).
+
config BT_HCIBPA10X
tristate "HCI BPA10x USB driver"
depends on USB
diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile
index 3321a8aea4a0..e0b261f24fc9 100644
--- a/drivers/bluetooth/Makefile
+++ b/drivers/bluetooth/Makefile
@@ -6,6 +6,7 @@
obj-$(CONFIG_BT_HCIVHCI) += hci_vhci.o
obj-$(CONFIG_BT_HCIUART) += hci_uart.o
obj-$(CONFIG_BT_HCIBCM203X) += bcm203x.o
+obj-$(CONFIG_BT_HCIBCM4377) += hci_bcm4377.o
obj-$(CONFIG_BT_HCIBPA10X) += bpa10x.o
obj-$(CONFIG_BT_HCIBFUSB) += bfusb.o
obj-$(CONFIG_BT_HCIDTL1) += dtl1_cs.o
diff --git a/drivers/bluetooth/hci_bcm4377.c b/drivers/bluetooth/hci_bcm4377.c
new file mode 100644
index 000000000000..74f44562ac33
--- /dev/null
+++ b/drivers/bluetooth/hci_bcm4377.c
@@ -0,0 +1,2514 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/*
+ * Bluetooth HCI driver for Broadcom 4377/4378/4387 devices attached via PCIe
+ *
+ * Copyright (C) The Asahi Linux Contributors
+ */
+
+#include <linux/async.h>
+#include <linux/bitfield.h>
+#include <linux/completion.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmi.h>
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/msi.h>
+#include <linux/of.h>
+#include <linux/pci.h>
+#include <linux/printk.h>
+
+#include <asm/unaligned.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+enum bcm4377_chip {
+ BCM4377 = 0,
+ BCM4378,
+ BCM4387,
+};
+
+#define BCM4377_DEVICE_ID 0x5fa0
+#define BCM4378_DEVICE_ID 0x5f69
+#define BCM4387_DEVICE_ID 0x5f71
+
+#define BCM4377_TIMEOUT 1000
+
+/*
+ * These devices only support DMA transactions inside a 32bit window
+ * (possibly to avoid 64 bit arithmetic). The window size cannot exceed
+ * 0xffffffff but is always aligned down to the previous 0x200 byte boundary
+ * which effectively limits the window to [start, start+0xfffffe00].
+ * We just limit the DMA window to [0, 0xfffffe00] to make sure we don't
+ * run into this limitation.
+ */
+#define BCM4377_DMA_MASK 0xfffffe00
+
+#define BCM4377_PCIECFG_BAR0_WINDOW1 0x80
+#define BCM4377_PCIECFG_BAR0_WINDOW2 0x70
+#define BCM4377_PCIECFG_BAR0_CORE2_WINDOW1 0x74
+#define BCM4377_PCIECFG_BAR0_CORE2_WINDOW2 0x78
+#define BCM4377_PCIECFG_BAR2_WINDOW 0x84
+
+#define BCM4377_PCIECFG_BAR0_CORE2_WINDOW1_DEFAULT 0x18011000
+#define BCM4377_PCIECFG_BAR2_WINDOW_DEFAULT 0x19000000
+
+#define BCM4377_PCIECFG_SUBSYSTEM_CTRL 0x88
+
+#define BCM4377_BAR0_FW_DOORBELL 0x140
+#define BCM4377_BAR0_RTI_CONTROL 0x144
+
+#define BCM4377_BAR0_SLEEP_CONTROL 0x150
+#define BCM4377_BAR0_SLEEP_CONTROL_UNQUIESCE 0
+#define BCM4377_BAR0_SLEEP_CONTROL_AWAKE 2
+#define BCM4377_BAR0_SLEEP_CONTROL_QUIESCE 3
+
+#define BCM4377_BAR0_DOORBELL 0x174
+#define BCM4377_BAR0_DOORBELL_VALUE GENMASK(31, 16)
+#define BCM4377_BAR0_DOORBELL_IDX GENMASK(15, 8)
+#define BCM4377_BAR0_DOORBELL_RING BIT(5)
+
+#define BCM4377_BAR0_HOST_WINDOW_LO 0x590
+#define BCM4377_BAR0_HOST_WINDOW_HI 0x594
+#define BCM4377_BAR0_HOST_WINDOW_SIZE 0x598
+
+#define BCM4377_BAR2_BOOTSTAGE 0x200454
+
+#define BCM4377_BAR2_FW_LO 0x200478
+#define BCM4377_BAR2_FW_HI 0x20047c
+#define BCM4377_BAR2_FW_SIZE 0x200480
+
+#define BCM4377_BAR2_CONTEXT_ADDR_LO 0x20048c
+#define BCM4377_BAR2_CONTEXT_ADDR_HI 0x200450
+
+#define BCM4377_BAR2_RTI_STATUS 0x20045c
+#define BCM4377_BAR2_RTI_WINDOW_LO 0x200494
+#define BCM4377_BAR2_RTI_WINDOW_HI 0x200498
+#define BCM4377_BAR2_RTI_WINDOW_SIZE 0x20049c
+
+#define BCM4377_OTP_SIZE 0xe0
+#define BCM4377_OTP_SYS_VENDOR 0x15
+#define BCM4377_OTP_CIS 0x80
+#define BCM4377_OTP_VENDOR_HDR 0x00000008
+#define BCM4377_OTP_MAX_PARAM_LEN 16
+
+#define BCM4377_N_TRANSFER_RINGS 9
+#define BCM4377_N_COMPLETION_RINGS 6
+
+#define BCM4377_MAX_RING_SIZE 256
+
+#define BCM4377_MSGID_GENERATION GENMASK(15, 8)
+#define BCM4377_MSGID_ID GENMASK(7, 0)
+
+#define BCM4377_RING_N_ENTRIES 128
+
+#define BCM4377_CONTROL_MSG_SIZE 0x34
+#define BCM4377_XFER_RING_MAX_INPLACE_PAYLOAD_SIZE (4 * 0xff)
+
+#define MAX_ACL_PAYLOAD_SIZE (HCI_MAX_FRAME_SIZE + HCI_ACL_HDR_SIZE)
+#define MAX_SCO_PAYLOAD_SIZE (HCI_MAX_SCO_SIZE + HCI_SCO_HDR_SIZE)
+#define MAX_EVENT_PAYLOAD_SIZE (HCI_MAX_EVENT_SIZE + HCI_EVENT_HDR_SIZE)
+
+enum bcm4377_otp_params_type {
+ BCM4377_OTP_BOARD_PARAMS,
+ BCM4377_OTP_CHIP_PARAMS
+};
+
+enum bcm4377_transfer_ring_id {
+ BCM4377_XFER_RING_CONTROL = 0,
+ BCM4377_XFER_RING_HCI_H2D = 1,
+ BCM4377_XFER_RING_HCI_D2H = 2,
+ BCM4377_XFER_RING_SCO_H2D = 3,
+ BCM4377_XFER_RING_SCO_D2H = 4,
+ BCM4377_XFER_RING_ACL_H2D = 5,
+ BCM4377_XFER_RING_ACL_D2H = 6,
+};
+
+enum bcm4377_completion_ring_id {
+ BCM4377_ACK_RING_CONTROL = 0,
+ BCM4377_ACK_RING_HCI_ACL = 1,
+ BCM4377_EVENT_RING_HCI_ACL = 2,
+ BCM4377_ACK_RING_SCO = 3,
+ BCM4377_EVENT_RING_SCO = 4,
+};
+
+enum bcm4377_doorbell {
+ BCM4377_DOORBELL_CONTROL = 0,
+ BCM4377_DOORBELL_HCI_H2D = 1,
+ BCM4377_DOORBELL_HCI_D2H = 2,
+ BCM4377_DOORBELL_ACL_H2D = 3,
+ BCM4377_DOORBELL_ACL_D2H = 4,
+ BCM4377_DOORBELL_SCO = 6,
+};
+
+/*
+ * Transfer ring entry
+ *
+ * flags: Flags to indicate if the payload is appended or mapped
+ * len: Payload length
+ * payload: Optional payload DMA address
+ * id: Message id to recognize the answer in the completion ring entry
+ */
+struct bcm4377_xfer_ring_entry {
+#define BCM4377_XFER_RING_FLAG_PAYLOAD_MAPPED BIT(0)
+#define BCM4377_XFER_RING_FLAG_PAYLOAD_IN_FOOTER BIT(1)
+ u8 flags;
+ __le16 len;
+ u8 _unk0;
+ __le64 payload;
+ __le16 id;
+ u8 _unk1[2];
+} __packed;
+static_assert(sizeof(struct bcm4377_xfer_ring_entry) == 0x10);
+
+/*
+ * Completion ring entry
+ *
+ * flags: Flags to indicate if the payload is appended or mapped. If the payload
+ * is mapped it can be found in the buffer of the corresponding transfer
+ * ring message.
+ * ring_id: Transfer ring ID which required this message
+ * msg_id: Message ID specified in transfer ring entry
+ * len: Payload length
+ */
+struct bcm4377_completion_ring_entry {
+ u8 flags;
+ u8 _unk0;
+ __le16 ring_id;
+ __le16 msg_id;
+ __le32 len;
+ u8 _unk1[6];
+} __packed;
+static_assert(sizeof(struct bcm4377_completion_ring_entry) == 0x10);
+
+enum bcm4377_control_message_type {
+ BCM4377_CONTROL_MSG_CREATE_XFER_RING = 1,
+ BCM4377_CONTROL_MSG_CREATE_COMPLETION_RING = 2,
+ BCM4377_CONTROL_MSG_DESTROY_XFER_RING = 3,
+ BCM4377_CONTROL_MSG_DESTROY_COMPLETION_RING = 4,
+};
+
+/*
+ * Control message used to create a completion ring
+ *
+ * msg_type: Must be BCM4377_CONTROL_MSG_CREATE_COMPLETION_RING
+ * header_size: Unknown, but probably reserved space in front of the entry
+ * footer_size: Number of 32 bit words reserved for payloads after the entry
+ * id/id_again: Completion ring index
+ * ring_iova: DMA address of the ring buffer
+ * n_elements: Number of elements inside the ring buffer
+ * msi: MSI index, doesn't work for all rings though and should be zero
+ * intmod_delay: Unknown delay
+ * intmod_bytes: Unknown
+ */
+struct bcm4377_create_completion_ring_msg {
+ u8 msg_type;
+ u8 header_size;
+ u8 footer_size;
+ u8 _unk0;
+ __le16 id;
+ __le16 id_again;
+ __le64 ring_iova;
+ __le16 n_elements;
+ __le32 unk;
+ u8 _unk1[6];
+ __le16 msi;
+ __le16 intmod_delay;
+ __le32 intmod_bytes;
+ __le16 _unk2;
+ __le32 _unk3;
+ u8 _unk4[10];
+} __packed;
+static_assert(sizeof(struct bcm4377_create_completion_ring_msg) ==
+ BCM4377_CONTROL_MSG_SIZE);
+
+/*
+ * Control ring message used to destroy a completion ring
+ *
+ * msg_type: Must be BCM4377_CONTROL_MSG_DESTROY_COMPLETION_RING
+ * ring_id: Completion ring to be destroyed
+ */
+struct bcm4377_destroy_completion_ring_msg {
+ u8 msg_type;
+ u8 _pad0;
+ __le16 ring_id;
+ u8 _pad1[48];
+} __packed;
+static_assert(sizeof(struct bcm4377_destroy_completion_ring_msg) ==
+ BCM4377_CONTROL_MSG_SIZE);
+
+/*
+ * Control message used to create a transfer ring
+ *
+ * msg_type: Must be BCM4377_CONTROL_MSG_CREATE_XFER_RING
+ * header_size: Number of 32 bit words reserved for unknown content before the
+ * entry
+ * footer_size: Number of 32 bit words reserved for payloads after the entry
+ * ring_id/ring_id_again: Transfer ring index
+ * ring_iova: DMA address of the ring buffer
+ * n_elements: Number of elements inside the ring buffer
+ * completion_ring_id: Completion ring index for acknowledgements and events
+ * doorbell: Doorbell index used to notify device of new entries
+ * flags: Transfer ring flags
+ * - virtual: set if there is no associated shared memory and only the
+ * corresponding completion ring is used
+ * - sync: only set for the SCO rings
+ */
+struct bcm4377_create_transfer_ring_msg {
+ u8 msg_type;
+ u8 header_size;
+ u8 footer_size;
+ u8 _unk0;
+ __le16 ring_id;
+ __le16 ring_id_again;
+ __le64 ring_iova;
+ u8 _unk1[8];
+ __le16 n_elements;
+ __le16 completion_ring_id;
+ __le16 doorbell;
+#define BCM4377_XFER_RING_FLAG_VIRTUAL BIT(7)
+#define BCM4377_XFER_RING_FLAG_SYNC BIT(8)
+ __le16 flags;
+ u8 _unk2[20];
+} __packed;
+static_assert(sizeof(struct bcm4377_create_transfer_ring_msg) ==
+ BCM4377_CONTROL_MSG_SIZE);
+
+/*
+ * Control ring message used to destroy a transfer ring
+ *
+ * msg_type: Must be BCM4377_CONTROL_MSG_DESTROY_XFER_RING
+ * ring_id: Transfer ring to be destroyed
+ */
+struct bcm4377_destroy_transfer_ring_msg {
+ u8 msg_type;
+ u8 _pad0;
+ __le16 ring_id;
+ u8 _pad1[48];
+} __packed;
+static_assert(sizeof(struct bcm4377_destroy_transfer_ring_msg) ==
+ BCM4377_CONTROL_MSG_SIZE);
+
+/*
+ * "Converged IPC" context struct used to make the device aware of all other
+ * shared memory structures. A pointer to this structure is configured inside a
+ * MMIO register.
+ *
+ * version: Protocol version, must be 2.
+ * size: Size of this structure, must be 0x68.
+ * enabled_caps: Enabled capabilities. Unknown bitfield but should be 2.
+ * peripheral_info_addr: DMA address for a 0x20 buffer to which the device will
+ * write unknown contents
+ * {completion,xfer}_ring_{tails,heads}_addr: DMA pointers to ring heads/tails
+ * n_completion_rings: Number of completion rings, the firmware only works if
+ * this is set to BCM4377_N_COMPLETION_RINGS.
+ * n_xfer_rings: Number of transfer rings, the firmware only works if
+ * this is set to BCM4377_N_TRANSFER_RINGS.
+ * control_completion_ring_addr: Control completion ring buffer DMA address
+ * control_xfer_ring_addr: Control transfer ring buffer DMA address
+ * control_xfer_ring_n_entries: Number of control transfer ring entries
+ * control_completion_ring_n_entries: Number of control completion ring entries
+ * control_xfer_ring_doorbell: Control transfer ring doorbell
+ * control_completion_ring_doorbell: Control completion ring doorbell,
+ * must be set to 0xffff
+ * control_xfer_ring_msi: Control completion ring MSI index, must be 0
+ * control_completion_ring_msi: Control completion ring MSI index, must be 0.
+ * control_xfer_ring_header_size: Number of 32 bit words reserved in front of
+ * every control transfer ring entry
+ * control_xfer_ring_footer_size: Number of 32 bit words reserved after every
+ * control transfer ring entry
+ * control_completion_ring_header_size: Number of 32 bit words reserved in front
+ * of every control completion ring entry
+ * control_completion_ring_footer_size: Number of 32 bit words reserved after
+ * every control completion ring entry
+ * scratch_pad: Optional scratch pad DMA address
+ * scratch_pad_size: Scratch pad size
+ */
+struct bcm4377_context {
+ __le16 version;
+ __le16 size;
+ __le32 enabled_caps;
+
+ __le64 peripheral_info_addr;
+
+ /* ring heads and tails */
+ __le64 completion_ring_heads_addr;
+ __le64 xfer_ring_tails_addr;
+ __le64 completion_ring_tails_addr;
+ __le64 xfer_ring_heads_addr;
+ __le16 n_completion_rings;
+ __le16 n_xfer_rings;
+
+ /* control ring configuration */
+ __le64 control_completion_ring_addr;
+ __le64 control_xfer_ring_addr;
+ __le16 control_xfer_ring_n_entries;
+ __le16 control_completion_ring_n_entries;
+ __le16 control_xfer_ring_doorbell;
+ __le16 control_completion_ring_doorbell;
+ __le16 control_xfer_ring_msi;
+ __le16 control_completion_ring_msi;
+ u8 control_xfer_ring_header_size;
+ u8 control_xfer_ring_footer_size;
+ u8 control_completion_ring_header_size;
+ u8 control_completion_ring_footer_size;
+
+ __le16 _unk0;
+ __le16 _unk1;
+
+ __le64 scratch_pad;
+ __le32 scratch_pad_size;
+
+ __le32 _unk3;
+} __packed;
+static_assert(sizeof(struct bcm4377_context) == 0x68);
+
+#define BCM4378_CALIBRATION_CHUNK_SIZE 0xe6
+struct bcm4378_hci_send_calibration_cmd {
+ u8 unk;
+ __le16 blocks_left;
+ u8 data[BCM4378_CALIBRATION_CHUNK_SIZE];
+} __packed;
+
+#define BCM4378_PTB_CHUNK_SIZE 0xcf
+struct bcm4378_hci_send_ptb_cmd {
+ __le16 blocks_left;
+ u8 data[BCM4378_PTB_CHUNK_SIZE];
+} __packed;
+
+/*
+ * Shared memory structure used to store the ring head and tail pointers.
+ */
+struct bcm4377_ring_state {
+ __le16 completion_ring_head[BCM4377_N_COMPLETION_RINGS];
+ __le16 completion_ring_tail[BCM4377_N_COMPLETION_RINGS];
+ __le16 xfer_ring_head[BCM4377_N_TRANSFER_RINGS];
+ __le16 xfer_ring_tail[BCM4377_N_TRANSFER_RINGS];
+};
+
+/*
+ * A transfer ring can be used in two configurations:
+ * 1) Send control or HCI messages to the device which are then acknowledged
+ * in the corresponding completion ring
+ * 2) Receiving HCI frames from the devices. In this case the transfer ring
+ * itself contains empty messages that are acknowledged once data is
+ * available from the device. If the payloads fit inside the footers
+ * of the completion ring the transfer ring can be configured to be
+ * virtual such that it has no ring buffer.
+ *
+ * ring_id: ring index hardcoded in the firmware
+ * doorbell: doorbell index to notify device of new entries
+ * payload_size: optional in-place payload size
+ * mapped_payload_size: optional out-of-place payload size
+ * completion_ring: index of corresponding completion ring
+ * n_entries: number of entries inside this ring
+ * generation: ring generation; incremented on hci_open to detect stale messages
+ * sync: set to true for SCO rings
+ * virtual: set to true if this ring has no entries and is just required to
+ * setup a corresponding completion ring for device->host messages
+ * d2h_buffers_only: set to true if this ring is only used to provide large
+ * buffers used by device->host messages in the completion
+ * ring
+ * allow_wait: allow to wait for messages to be acknowledged
+ * enabled: true once the ring has been created and can be used
+ * ring: ring buffer for entries (struct bcm4377_xfer_ring_entry)
+ * ring_dma: DMA address for ring entry buffer
+ * payloads: payload buffer for mapped_payload_size payloads
+ * payloads_dma:DMA address for payload buffer
+ * events: pointer to array of completions if waiting is allowed
+ * msgids: bitmap to keep track of used message ids
+ * lock: Spinlock to protect access to ring structurs used in the irq handler
+ */
+struct bcm4377_transfer_ring {
+ enum bcm4377_transfer_ring_id ring_id;
+ enum bcm4377_doorbell doorbell;
+ size_t payload_size;
+ size_t mapped_payload_size;
+ u8 completion_ring;
+ u16 n_entries;
+ u8 generation;
+
+ bool sync;
+ bool virtual;
+ bool d2h_buffers_only;
+ bool allow_wait;
+ bool enabled;
+
+ void *ring;
+ dma_addr_t ring_dma;
+
+ void *payloads;
+ dma_addr_t payloads_dma;
+
+ struct completion **events;
+ DECLARE_BITMAP(msgids, BCM4377_MAX_RING_SIZE);
+ spinlock_t lock;
+};
+
+/*
+ * A completion ring can be either used to either acknowledge messages sent in
+ * the corresponding transfer ring or to receive messages associated with the
+ * transfer ring. When used to receive messages the transfer ring either
+ * has no ring buffer and is only advanced ("virtual transfer ring") or it
+ * only contains empty DMA buffers to be used for the payloads.
+ *
+ * ring_id: completion ring id, hardcoded in firmware
+ * payload_size: optional payload size after each entry
+ * delay: unknown delay
+ * n_entries: number of entries in this ring
+ * enabled: true once the ring has been created and can be used
+ * ring: ring buffer for entries (struct bcm4377_completion_ring_entry)
+ * ring_dma: DMA address of ring buffer
+ * transfer_rings: bitmap of corresponding transfer ring ids
+ */
+struct bcm4377_completion_ring {
+ enum bcm4377_completion_ring_id ring_id;
+ u16 payload_size;
+ u16 delay;
+ u16 n_entries;
+ bool enabled;
+
+ void *ring;
+ dma_addr_t ring_dma;
+
+ unsigned long transfer_rings;
+};
+
+struct bcm4377_data;
+
+/*
+ * Chip-specific configuration struct
+ *
+ * id: Chip id (e.g. 0x4377 for BCM4377)
+ * otp_offset: Offset to the start of the OTP inside BAR0
+ * bar0_window1: Backplane address mapped to the first window in BAR0
+ * bar0_window2: Backplane address mapped to the second window in BAR0
+ * bar0_core2_window2: Optional backplane address mapped to the second core's
+ * second window in BAR0
+ * has_bar0_core2_window2: Set to true if this chip requires the second core's
+ * second window to be configured
+ * clear_pciecfg_subsystem_ctrl_bit19: Set to true if bit 19 in the
+ * vendor-specific subsystem control
+ * register has to be cleared
+ * disable_aspm: Set to true if ASPM must be disabled due to hardware errata
+ * broken_ext_scan: Set to true if the chip erroneously claims to support
+ * extended scanning
+ * broken_mws_transport_config: Set to true if the chip erroneously claims to
+ * support MWS Transport Configuration
+ * send_calibration: Optional callback to send calibration data
+ * send_ptb: Callback to send "PTB" regulatory/calibration data
+ */
+struct bcm4377_hw {
+ unsigned int id;
+
+ u32 otp_offset;
+
+ u32 bar0_window1;
+ u32 bar0_window2;
+ u32 bar0_core2_window2;
+
+ unsigned long has_bar0_core2_window2 : 1;
+ unsigned long clear_pciecfg_subsystem_ctrl_bit19 : 1;
+ unsigned long disable_aspm : 1;
+ unsigned long broken_ext_scan : 1;
+ unsigned long broken_mws_transport_config : 1;
+
+ int (*send_calibration)(struct bcm4377_data *bcm4377);
+ int (*send_ptb)(struct bcm4377_data *bcm4377,
+ const struct firmware *fw);
+};
+
+static const struct bcm4377_hw bcm4377_hw_variants[];
+static const struct dmi_system_id bcm4377_dmi_board_table[];
+
+/*
+ * Private struct associated with each device containing global state
+ *
+ * pdev: Pointer to associated struct pci_dev
+ * hdev: Pointer to associated strucy hci_dev
+ * bar0: iomem pointing to BAR0
+ * bar1: iomem pointing to BAR2
+ * bootstage: Current value of the bootstage
+ * rti_status: Current "RTI" status value
+ * hw: Pointer to chip-specific struct bcm4377_hw
+ * taurus_cal_blob: "Taurus" calibration blob used for some chips
+ * taurus_cal_size: "Taurus" calibration blob size
+ * taurus_beamforming_cal_blob: "Taurus" beamforming calibration blob used for
+ * some chips
+ * taurus_beamforming_cal_size: "Taurus" beamforming calibration blob size
+ * stepping: Chip stepping read from OTP; used for firmware selection
+ * vendor: Antenna vendor read from OTP; used for firmware selection
+ * board_type: Board type from FDT or DMI match; used for firmware selection
+ * event: Event for changed bootstage or rti_status; used for booting firmware
+ * ctx: "Converged IPC" context
+ * ctx_dma: "Converged IPC" context DMA address
+ * ring_state: Shared memory buffer containing ring head and tail indexes
+ * ring_state_dma: DMA address for ring_state
+ * {control,hci_acl,sco}_ack_ring: Completion rings used to acknowledge messages
+ * {hci_acl,sco}_event_ring: Completion rings used for device->host messages
+ * control_h2d_ring: Transfer ring used for control messages
+ * {hci,sco,acl}_h2d_ring: Transfer ring used to transfer HCI frames
+ * {hci,sco,acl}_d2h_ring: Transfer ring used to receive HCI frames in the
+ * corresponding completion ring
+ */
+struct bcm4377_data {
+ struct pci_dev *pdev;
+ struct hci_dev *hdev;
+
+ void __iomem *bar0;
+ void __iomem *bar2;
+
+ u32 bootstage;
+ u32 rti_status;
+
+ const struct bcm4377_hw *hw;
+
+ const void *taurus_cal_blob;
+ int taurus_cal_size;
+ const void *taurus_beamforming_cal_blob;
+ int taurus_beamforming_cal_size;
+
+ char stepping[BCM4377_OTP_MAX_PARAM_LEN];
+ char vendor[BCM4377_OTP_MAX_PARAM_LEN];
+ const char *board_type;
+
+ struct completion event;
+
+ struct bcm4377_context *ctx;
+ dma_addr_t ctx_dma;
+
+ struct bcm4377_ring_state *ring_state;
+ dma_addr_t ring_state_dma;
+
+ /*
+ * The HCI and ACL rings have to be merged because this structure is
+ * hardcoded in the firmware.
+ */
+ struct bcm4377_completion_ring control_ack_ring;
+ struct bcm4377_completion_ring hci_acl_ack_ring;
+ struct bcm4377_completion_ring hci_acl_event_ring;
+ struct bcm4377_completion_ring sco_ack_ring;
+ struct bcm4377_completion_ring sco_event_ring;
+
+ struct bcm4377_transfer_ring control_h2d_ring;
+ struct bcm4377_transfer_ring hci_h2d_ring;
+ struct bcm4377_transfer_ring hci_d2h_ring;
+ struct bcm4377_transfer_ring sco_h2d_ring;
+ struct bcm4377_transfer_ring sco_d2h_ring;
+ struct bcm4377_transfer_ring acl_h2d_ring;
+ struct bcm4377_transfer_ring acl_d2h_ring;
+};
+
+static void bcm4377_ring_doorbell(struct bcm4377_data *bcm4377, u8 doorbell,
+ u16 val)
+{
+ u32 db = 0;
+
+ db |= FIELD_PREP(BCM4377_BAR0_DOORBELL_VALUE, val);
+ db |= FIELD_PREP(BCM4377_BAR0_DOORBELL_IDX, doorbell);
+ db |= BCM4377_BAR0_DOORBELL_RING;
+
+ dev_dbg(&bcm4377->pdev->dev, "write %d to doorbell #%d (0x%x)\n", val,
+ doorbell, db);
+ iowrite32(db, bcm4377->bar0 + BCM4377_BAR0_DOORBELL);
+}
+
+static int bcm4377_extract_msgid(struct bcm4377_data *bcm4377,
+ struct bcm4377_transfer_ring *ring,
+ u16 raw_msgid, u8 *msgid)
+{
+ u8 generation = FIELD_GET(BCM4377_MSGID_GENERATION, raw_msgid);
+ *msgid = FIELD_GET(BCM4377_MSGID_ID, raw_msgid);
+
+ if (generation != ring->generation) {
+ dev_warn(
+ &bcm4377->pdev->dev,
+ "invalid message generation %d should be %d in entry for ring %d\n",
+ generation, ring->generation, ring->ring_id);
+ return -EINVAL;
+ }
+
+ if (*msgid >= ring->n_entries) {
+ dev_warn(&bcm4377->pdev->dev,
+ "invalid message id in entry for ring %d: %d > %d\n",
+ ring->ring_id, *msgid, ring->n_entries);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void bcm4377_handle_event(struct bcm4377_data *bcm4377,
+ struct bcm4377_transfer_ring *ring,
+ u16 raw_msgid, u8 entry_flags, u8 type,
+ void *payload, size_t len)
+{
+ struct sk_buff *skb;
+ u16 head;
+ u8 msgid;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ring->lock, flags);
+ if (!ring->enabled) {
+ dev_warn(&bcm4377->pdev->dev,
+ "event for disabled transfer ring %d\n",
+ ring->ring_id);
+ goto out;
+ }
+
+ if (ring->d2h_buffers_only &&
+ entry_flags & BCM4377_XFER_RING_FLAG_PAYLOAD_MAPPED) {
+ if (bcm4377_extract_msgid(bcm4377, ring, raw_msgid, &msgid))
+ goto out;
+
+ if (len > ring->mapped_payload_size) {
+ dev_warn(
+ &bcm4377->pdev->dev,
+ "invalid payload len in event for ring %d: %zu > %zu\n",
+ ring->ring_id, len, ring->mapped_payload_size);
+ goto out;
+ }
+
+ payload = ring->payloads + msgid * ring->mapped_payload_size;
+ }
+
+ skb = bt_skb_alloc(len, GFP_ATOMIC);
+ if (!skb)
+ goto out;
+
+ memcpy(skb_put(skb, len), payload, len);
+ hci_skb_pkt_type(skb) = type;
+ hci_recv_frame(bcm4377->hdev, skb);
+
+out:
+ head = le16_to_cpu(bcm4377->ring_state->xfer_ring_head[ring->ring_id]);
+ head = (head + 1) % ring->n_entries;
+ bcm4377->ring_state->xfer_ring_head[ring->ring_id] = cpu_to_le16(head);
+
+ bcm4377_ring_doorbell(bcm4377, ring->doorbell, head);
+
+ spin_unlock_irqrestore(&ring->lock, flags);
+}
+
+static void bcm4377_handle_ack(struct bcm4377_data *bcm4377,
+ struct bcm4377_transfer_ring *ring,
+ u16 raw_msgid)
+{
+ unsigned long flags;
+ u8 msgid;
+
+ spin_lock_irqsave(&ring->lock, flags);
+
+ if (bcm4377_extract_msgid(bcm4377, ring, raw_msgid, &msgid))
+ goto unlock;
+
+ if (!test_bit(msgid, ring->msgids)) {
+ dev_warn(
+ &bcm4377->pdev->dev,
+ "invalid message id in ack for ring %d: %d is not used\n",
+ ring->ring_id, msgid);
+ goto unlock;
+ }
+
+ if (ring->allow_wait && ring->events[msgid]) {
+ complete(ring->events[msgid]);
+ ring->events[msgid] = NULL;
+ }
+
+ bitmap_release_region(ring->msgids, msgid, ring->n_entries);
+
+unlock:
+ spin_unlock_irqrestore(&ring->lock, flags);
+}
+
+static void bcm4377_handle_completion(struct bcm4377_data *bcm4377,
+ struct bcm4377_completion_ring *ring,
+ u16 pos)
+{
+ struct bcm4377_completion_ring_entry *entry;
+ u16 msg_id, transfer_ring;
+ size_t entry_size, data_len;
+ void *data;
+
+ if (pos >= ring->n_entries) {
+ dev_warn(&bcm4377->pdev->dev,
+ "invalid offset %d for completion ring %d\n", pos,
+ ring->ring_id);
+ return;
+ }
+
+ entry_size = sizeof(*entry) + ring->payload_size;
+ entry = ring->ring + pos * entry_size;
+ data = ring->ring + pos * entry_size + sizeof(*entry);
+ data_len = le32_to_cpu(entry->len);
+ msg_id = le16_to_cpu(entry->msg_id);
+ transfer_ring = le16_to_cpu(entry->ring_id);
+
+ if ((ring->transfer_rings & BIT(transfer_ring)) == 0) {
+ dev_warn(
+ &bcm4377->pdev->dev,
+ "invalid entry at offset %d for transfer ring %d in completion ring %d\n",
+ pos, transfer_ring, ring->ring_id);
+ return;
+ }
+
+ dev_dbg(&bcm4377->pdev->dev,
+ "entry in completion ring %d for transfer ring %d with msg_id %d\n",
+ ring->ring_id, transfer_ring, msg_id);
+
+ switch (transfer_ring) {
+ case BCM4377_XFER_RING_CONTROL:
+ bcm4377_handle_ack(bcm4377, &bcm4377->control_h2d_ring, msg_id);
+ break;
+ case BCM4377_XFER_RING_HCI_H2D:
+ bcm4377_handle_ack(bcm4377, &bcm4377->hci_h2d_ring, msg_id);
+ break;
+ case BCM4377_XFER_RING_SCO_H2D:
+ bcm4377_handle_ack(bcm4377, &bcm4377->sco_h2d_ring, msg_id);
+ break;
+ case BCM4377_XFER_RING_ACL_H2D:
+ bcm4377_handle_ack(bcm4377, &bcm4377->acl_h2d_ring, msg_id);
+ break;
+
+ case BCM4377_XFER_RING_HCI_D2H:
+ bcm4377_handle_event(bcm4377, &bcm4377->hci_d2h_ring, msg_id,
+ entry->flags, HCI_EVENT_PKT, data,
+ data_len);
+ break;
+ case BCM4377_XFER_RING_SCO_D2H:
+ bcm4377_handle_event(bcm4377, &bcm4377->sco_d2h_ring, msg_id,
+ entry->flags, HCI_SCODATA_PKT, data,
+ data_len);
+ break;
+ case BCM4377_XFER_RING_ACL_D2H:
+ bcm4377_handle_event(bcm4377, &bcm4377->acl_d2h_ring, msg_id,
+ entry->flags, HCI_ACLDATA_PKT, data,
+ data_len);
+ break;
+
+ default:
+ dev_warn(
+ &bcm4377->pdev->dev,
+ "entry in completion ring %d for unknown transfer ring %d with msg_id %d\n",
+ ring->ring_id, transfer_ring, msg_id);
+ }
+}
+
+static void bcm4377_poll_completion_ring(struct bcm4377_data *bcm4377,
+ struct bcm4377_completion_ring *ring)
+{
+ u16 tail;
+ __le16 *heads = bcm4377->ring_state->completion_ring_head;
+ __le16 *tails = bcm4377->ring_state->completion_ring_tail;
+
+ if (!ring->enabled)
+ return;
+
+ tail = le16_to_cpu(tails[ring->ring_id]);
+ dev_dbg(&bcm4377->pdev->dev,
+ "completion ring #%d: head: %d, tail: %d\n", ring->ring_id,
+ le16_to_cpu(heads[ring->ring_id]), tail);
+
+ while (tail != le16_to_cpu(READ_ONCE(heads[ring->ring_id]))) {
+ /*
+ * ensure the CPU doesn't speculate through the comparison.
+ * otherwise it might already read the (empty) queue entry
+ * before the updated head has been loaded and checked.
+ */
+ dma_rmb();
+
+ bcm4377_handle_completion(bcm4377, ring, tail);
+
+ tail = (tail + 1) % ring->n_entries;
+ tails[ring->ring_id] = cpu_to_le16(tail);
+ }
+}
+
+static irqreturn_t bcm4377_irq(int irq, void *data)
+{
+ struct bcm4377_data *bcm4377 = data;
+ u32 bootstage, rti_status;
+
+ bootstage = ioread32(bcm4377->bar2 + BCM4377_BAR2_BOOTSTAGE);
+ rti_status = ioread32(bcm4377->bar2 + BCM4377_BAR2_RTI_STATUS);
+
+ if (bootstage != bcm4377->bootstage ||
+ rti_status != bcm4377->rti_status) {
+ dev_dbg(&bcm4377->pdev->dev,
+ "bootstage = %d -> %d, rti state = %d -> %d\n",
+ bcm4377->bootstage, bootstage, bcm4377->rti_status,
+ rti_status);
+ complete(&bcm4377->event);
+ bcm4377->bootstage = bootstage;
+ bcm4377->rti_status = rti_status;
+ }
+
+ if (rti_status > 2)
+ dev_err(&bcm4377->pdev->dev, "RTI status is %d\n", rti_status);
+
+ bcm4377_poll_completion_ring(bcm4377, &bcm4377->control_ack_ring);
+ bcm4377_poll_completion_ring(bcm4377, &bcm4377->hci_acl_event_ring);
+ bcm4377_poll_completion_ring(bcm4377, &bcm4377->hci_acl_ack_ring);
+ bcm4377_poll_completion_ring(bcm4377, &bcm4377->sco_ack_ring);
+ bcm4377_poll_completion_ring(bcm4377, &bcm4377->sco_event_ring);
+
+ return IRQ_HANDLED;
+}
+
+static int bcm4377_enqueue(struct bcm4377_data *bcm4377,
+ struct bcm4377_transfer_ring *ring, void *data,
+ size_t len, bool wait)
+{
+ unsigned long flags;
+ struct bcm4377_xfer_ring_entry *entry;
+ void *payload;
+ size_t offset;
+ u16 head, tail, new_head;
+ u16 raw_msgid;
+ int ret, msgid;
+ DECLARE_COMPLETION_ONSTACK(event);
+
+ if (len > ring->payload_size && len > ring->mapped_payload_size) {
+ dev_warn(
+ &bcm4377->pdev->dev,
+ "payload len %zu is too large for ring %d (max is %zu or %zu)\n",
+ len, ring->ring_id, ring->payload_size,
+ ring->mapped_payload_size);
+ return -EINVAL;
+ }
+ if (wait && !ring->allow_wait)
+ return -EINVAL;
+ if (ring->virtual)
+ return -EINVAL;
+
+ spin_lock_irqsave(&ring->lock, flags);
+
+ head = le16_to_cpu(bcm4377->ring_state->xfer_ring_head[ring->ring_id]);
+ tail = le16_to_cpu(bcm4377->ring_state->xfer_ring_tail[ring->ring_id]);
+
+ new_head = (head + 1) % ring->n_entries;
+
+ if (new_head == tail) {
+ dev_warn(&bcm4377->pdev->dev,
+ "can't send message because ring %d is full\n",
+ ring->ring_id);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ msgid = bitmap_find_free_region(ring->msgids, ring->n_entries, 0);
+ if (msgid < 0) {
+ dev_warn(&bcm4377->pdev->dev,
+ "can't find message id for ring %d\n", ring->ring_id);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ raw_msgid = FIELD_PREP(BCM4377_MSGID_GENERATION, ring->generation);
+ raw_msgid |= FIELD_PREP(BCM4377_MSGID_ID, msgid);
+
+ offset = head * (sizeof(*entry) + ring->payload_size);
+ entry = ring->ring + offset;
+
+ memset(entry, 0, sizeof(*entry));
+ entry->id = cpu_to_le16(raw_msgid);
+ entry->len = cpu_to_le16(len);
+
+ if (len <= ring->payload_size) {
+ entry->flags = BCM4377_XFER_RING_FLAG_PAYLOAD_IN_FOOTER;
+ payload = ring->ring + offset + sizeof(*entry);
+ } else {
+ entry->flags = BCM4377_XFER_RING_FLAG_PAYLOAD_MAPPED;
+ entry->payload = cpu_to_le64(ring->payloads_dma +
+ msgid * ring->mapped_payload_size);
+ payload = ring->payloads + msgid * ring->mapped_payload_size;
+ }
+
+ memcpy(payload, data, len);
+
+ if (wait)
+ ring->events[msgid] = &event;
+
+ /*
+ * The 4377 chips stop responding to any commands as soon as they
+ * have been idle for a while. Poking the sleep control register here
+ * makes them come alive again.
+ */
+ iowrite32(BCM4377_BAR0_SLEEP_CONTROL_AWAKE,
+ bcm4377->bar0 + BCM4377_BAR0_SLEEP_CONTROL);
+
+ dev_dbg(&bcm4377->pdev->dev,
+ "updating head for transfer queue #%d to %d\n", ring->ring_id,
+ new_head);
+ bcm4377->ring_state->xfer_ring_head[ring->ring_id] =
+ cpu_to_le16(new_head);
+
+ if (!ring->sync)
+ bcm4377_ring_doorbell(bcm4377, ring->doorbell, new_head);
+ ret = 0;
+
+out:
+ spin_unlock_irqrestore(&ring->lock, flags);
+
+ if (ret == 0 && wait) {
+ ret = wait_for_completion_interruptible_timeout(
+ &event, BCM4377_TIMEOUT);
+ if (ret == 0)
+ ret = -ETIMEDOUT;
+ else if (ret > 0)
+ ret = 0;
+
+ spin_lock_irqsave(&ring->lock, flags);
+ ring->events[msgid] = NULL;
+ spin_unlock_irqrestore(&ring->lock, flags);
+ }
+
+ return ret;
+}
+
+static int bcm4377_create_completion_ring(struct bcm4377_data *bcm4377,
+ struct bcm4377_completion_ring *ring)
+{
+ struct bcm4377_create_completion_ring_msg msg;
+ int ret;
+
+ if (ring->enabled) {
+ dev_warn(&bcm4377->pdev->dev,
+ "completion ring %d already enabled\n", ring->ring_id);
+ return 0;
+ }
+
+ memset(ring->ring, 0,
+ ring->n_entries * (sizeof(struct bcm4377_completion_ring_entry) +
+ ring->payload_size));
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_type = BCM4377_CONTROL_MSG_CREATE_COMPLETION_RING;
+ msg.id = cpu_to_le16(ring->ring_id);
+ msg.id_again = cpu_to_le16(ring->ring_id);
+ msg.ring_iova = cpu_to_le64(ring->ring_dma);
+ msg.n_elements = cpu_to_le16(ring->n_entries);
+ msg.intmod_bytes = cpu_to_le32(0xffffffff);
+ msg.unk = cpu_to_le32(0xffffffff);
+ msg.intmod_delay = cpu_to_le16(ring->delay);
+ msg.footer_size = ring->payload_size / 4;
+
+ ret = bcm4377_enqueue(bcm4377, &bcm4377->control_h2d_ring, &msg,
+ sizeof(msg), true);
+ if (!ret)
+ ring->enabled = true;
+
+ return ret;
+}
+
+static int bcm4377_destroy_completion_ring(struct bcm4377_data *bcm4377,
+ struct bcm4377_completion_ring *ring)
+{
+ struct bcm4377_destroy_completion_ring_msg msg;
+ int ret;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_type = BCM4377_CONTROL_MSG_DESTROY_COMPLETION_RING;
+ msg.ring_id = cpu_to_le16(ring->ring_id);
+
+ ret = bcm4377_enqueue(bcm4377, &bcm4377->control_h2d_ring, &msg,
+ sizeof(msg), true);
+ if (ret)
+ dev_warn(&bcm4377->pdev->dev,
+ "failed to destroy completion ring %d\n",
+ ring->ring_id);
+
+ ring->enabled = false;
+ return ret;
+}
+
+static int bcm4377_create_transfer_ring(struct bcm4377_data *bcm4377,
+ struct bcm4377_transfer_ring *ring)
+{
+ struct bcm4377_create_transfer_ring_msg msg;
+ u16 flags = 0;
+ int ret, i;
+ unsigned long spinlock_flags;
+
+ if (ring->virtual)
+ flags |= BCM4377_XFER_RING_FLAG_VIRTUAL;
+ if (ring->sync)
+ flags |= BCM4377_XFER_RING_FLAG_SYNC;
+
+ spin_lock_irqsave(&ring->lock, spinlock_flags);
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_type = BCM4377_CONTROL_MSG_CREATE_XFER_RING;
+ msg.ring_id = cpu_to_le16(ring->ring_id);
+ msg.ring_id_again = cpu_to_le16(ring->ring_id);
+ msg.ring_iova = cpu_to_le64(ring->ring_dma);
+ msg.n_elements = cpu_to_le16(ring->n_entries);
+ msg.completion_ring_id = cpu_to_le16(ring->completion_ring);
+ msg.doorbell = cpu_to_le16(ring->doorbell);
+ msg.flags = cpu_to_le16(flags);
+ msg.footer_size = ring->payload_size / 4;
+
+ bcm4377->ring_state->xfer_ring_head[ring->ring_id] = 0;
+ bcm4377->ring_state->xfer_ring_tail[ring->ring_id] = 0;
+ ring->generation++;
+ spin_unlock_irqrestore(&ring->lock, spinlock_flags);
+
+ ret = bcm4377_enqueue(bcm4377, &bcm4377->control_h2d_ring, &msg,
+ sizeof(msg), true);
+
+ spin_lock_irqsave(&ring->lock, spinlock_flags);
+
+ if (ring->d2h_buffers_only) {
+ for (i = 0; i < ring->n_entries; ++i) {
+ struct bcm4377_xfer_ring_entry *entry =
+ ring->ring + i * sizeof(*entry);
+ u16 raw_msgid = FIELD_PREP(BCM4377_MSGID_GENERATION,
+ ring->generation);
+ raw_msgid |= FIELD_PREP(BCM4377_MSGID_ID, i);
+
+ memset(entry, 0, sizeof(*entry));
+ entry->id = cpu_to_le16(raw_msgid);
+ entry->len = cpu_to_le16(ring->mapped_payload_size);
+ entry->flags = BCM4377_XFER_RING_FLAG_PAYLOAD_MAPPED;
+ entry->payload =
+ cpu_to_le64(ring->payloads_dma +
+ i * ring->mapped_payload_size);
+ }
+ }
+
+ /*
+ * send some messages if this is a device->host ring to allow the device
+ * to reply by acknowledging them in the completion ring
+ */
+ if (ring->virtual || ring->d2h_buffers_only) {
+ bcm4377->ring_state->xfer_ring_head[ring->ring_id] =
+ cpu_to_le16(0xf);
+ bcm4377_ring_doorbell(bcm4377, ring->doorbell, 0xf);
+ }
+
+ ring->enabled = true;
+ spin_unlock_irqrestore(&ring->lock, spinlock_flags);
+
+ return ret;
+}
+
+static int bcm4377_destroy_transfer_ring(struct bcm4377_data *bcm4377,
+ struct bcm4377_transfer_ring *ring)
+{
+ struct bcm4377_destroy_transfer_ring_msg msg;
+ int ret;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_type = BCM4377_CONTROL_MSG_DESTROY_XFER_RING;
+ msg.ring_id = cpu_to_le16(ring->ring_id);
+
+ ret = bcm4377_enqueue(bcm4377, &bcm4377->control_h2d_ring, &msg,
+ sizeof(msg), true);
+ if (ret)
+ dev_warn(&bcm4377->pdev->dev,
+ "failed to destroy transfer ring %d\n", ring->ring_id);
+
+ ring->enabled = false;
+ return ret;
+}
+
+static int __bcm4378_send_calibration_chunk(struct bcm4377_data *bcm4377,
+ const void *data, size_t data_len,
+ u16 blocks_left)
+{
+ struct bcm4378_hci_send_calibration_cmd cmd;
+ struct sk_buff *skb;
+
+ if (data_len > sizeof(cmd.data))
+ return -EINVAL;
+
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.unk = 0x03;
+ cmd.blocks_left = cpu_to_le16(blocks_left);
+ memcpy(cmd.data, data, data_len);
+
+ skb = __hci_cmd_sync(bcm4377->hdev, 0xfd97, sizeof(cmd), &cmd,
+ HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ kfree_skb(skb);
+ return 0;
+}
+
+static int __bcm4378_send_calibration(struct bcm4377_data *bcm4377,
+ const void *data, size_t data_size)
+{
+ int ret;
+ size_t i, left, transfer_len;
+ size_t blocks =
+ DIV_ROUND_UP(data_size, (size_t)BCM4378_CALIBRATION_CHUNK_SIZE);
+
+ if (!data) {
+ dev_err(&bcm4377->pdev->dev,
+ "no calibration data available.\n");
+ return -ENOENT;
+ }
+
+ for (i = 0, left = data_size; i < blocks; ++i, left -= transfer_len) {
+ transfer_len =
+ min_t(size_t, left, BCM4378_CALIBRATION_CHUNK_SIZE);
+
+ ret = __bcm4378_send_calibration_chunk(
+ bcm4377, data + i * BCM4378_CALIBRATION_CHUNK_SIZE,
+ transfer_len, blocks - i - 1);
+ if (ret) {
+ dev_err(&bcm4377->pdev->dev,
+ "send calibration chunk failed with %d\n", ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int bcm4378_send_calibration(struct bcm4377_data *bcm4377)
+{
+ if ((strcmp(bcm4377->stepping, "b1") == 0) ||
+ strcmp(bcm4377->stepping, "b3") == 0)
+ return __bcm4378_send_calibration(
+ bcm4377, bcm4377->taurus_beamforming_cal_blob,
+ bcm4377->taurus_beamforming_cal_size);
+ else
+ return __bcm4378_send_calibration(bcm4377,
+ bcm4377->taurus_cal_blob,
+ bcm4377->taurus_cal_size);
+}
+
+static int bcm4387_send_calibration(struct bcm4377_data *bcm4377)
+{
+ if (strcmp(bcm4377->stepping, "c2") == 0)
+ return __bcm4378_send_calibration(
+ bcm4377, bcm4377->taurus_beamforming_cal_blob,
+ bcm4377->taurus_beamforming_cal_size);
+ else
+ return __bcm4378_send_calibration(bcm4377,
+ bcm4377->taurus_cal_blob,
+ bcm4377->taurus_cal_size);
+}
+
+static const struct firmware *bcm4377_request_blob(struct bcm4377_data *bcm4377,
+ const char *suffix)
+{
+ const struct firmware *fw;
+ char name0[64], name1[64];
+ int ret;
+
+ snprintf(name0, sizeof(name0), "brcm/brcmbt%04x%s-%s-%s.%s",
+ bcm4377->hw->id, bcm4377->stepping, bcm4377->board_type,
+ bcm4377->vendor, suffix);
+ snprintf(name1, sizeof(name1), "brcm/brcmbt%04x%s-%s.%s",
+ bcm4377->hw->id, bcm4377->stepping, bcm4377->board_type,
+ suffix);
+ dev_dbg(&bcm4377->pdev->dev, "Trying to load firmware: '%s' or '%s'\n",
+ name0, name1);
+
+ ret = firmware_request_nowarn(&fw, name0, &bcm4377->pdev->dev);
+ if (!ret)
+ return fw;
+ ret = firmware_request_nowarn(&fw, name1, &bcm4377->pdev->dev);
+ if (!ret)
+ return fw;
+
+ dev_err(&bcm4377->pdev->dev,
+ "Unable to load firmware; tried '%s' and '%s'\n", name0, name1);
+ return NULL;
+}
+
+static int bcm4377_send_ptb(struct bcm4377_data *bcm4377,
+ const struct firmware *fw)
+{
+ struct sk_buff *skb;
+
+ skb = __hci_cmd_sync(bcm4377->hdev, 0xfd98, fw->size, fw->data,
+ HCI_INIT_TIMEOUT);
+ /*
+ * This command seems to always fail on more recent firmware versions
+ * (even in traces taken from the macOS driver). It's unclear why this
+ * happens but because the PTB file contains calibration and/or
+ * regulatory data and may be required on older firmware we still try to
+ * send it here just in case and just ignore if it fails.
+ */
+ if (!IS_ERR(skb))
+ kfree_skb(skb);
+ return 0;
+}
+
+static int bcm4378_send_ptb_chunk(struct bcm4377_data *bcm4377,
+ const void *data, size_t data_len,
+ u16 blocks_left)
+{
+ struct bcm4378_hci_send_ptb_cmd cmd;
+ struct sk_buff *skb;
+
+ if (data_len > BCM4378_PTB_CHUNK_SIZE)
+ return -EINVAL;
+
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.blocks_left = cpu_to_le16(blocks_left);
+ memcpy(cmd.data, data, data_len);
+
+ skb = __hci_cmd_sync(bcm4377->hdev, 0xfe0d, sizeof(cmd), &cmd,
+ HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ kfree_skb(skb);
+ return 0;
+}
+
+static int bcm4378_send_ptb(struct bcm4377_data *bcm4377,
+ const struct firmware *fw)
+{
+ size_t chunks = DIV_ROUND_UP(fw->size, (size_t)BCM4378_PTB_CHUNK_SIZE);
+ size_t i, left, transfer_len;
+ int ret;
+
+ for (i = 0, left = fw->size; i < chunks; ++i, left -= transfer_len) {
+ transfer_len = min_t(size_t, left, BCM4378_PTB_CHUNK_SIZE);
+
+ dev_dbg(&bcm4377->pdev->dev, "sending ptb chunk %zu/%zu\n",
+ i + 1, chunks);
+ ret = bcm4378_send_ptb_chunk(
+ bcm4377, fw->data + i * BCM4378_PTB_CHUNK_SIZE,
+ transfer_len, chunks - i - 1);
+ if (ret) {
+ dev_err(&bcm4377->pdev->dev,
+ "sending ptb chunk %zu failed (%d)", i, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int bcm4377_hci_open(struct hci_dev *hdev)
+{
+ struct bcm4377_data *bcm4377 = hci_get_drvdata(hdev);
+ int ret;
+
+ dev_dbg(&bcm4377->pdev->dev, "creating rings\n");
+
+ ret = bcm4377_create_completion_ring(bcm4377,
+ &bcm4377->hci_acl_ack_ring);
+ if (ret)
+ return ret;
+ ret = bcm4377_create_completion_ring(bcm4377,
+ &bcm4377->hci_acl_event_ring);
+ if (ret)
+ goto destroy_hci_acl_ack;
+ ret = bcm4377_create_completion_ring(bcm4377, &bcm4377->sco_ack_ring);
+ if (ret)
+ goto destroy_hci_acl_event;
+ ret = bcm4377_create_completion_ring(bcm4377, &bcm4377->sco_event_ring);
+ if (ret)
+ goto destroy_sco_ack;
+ dev_dbg(&bcm4377->pdev->dev,
+ "all completion rings successfully created!\n");
+
+ ret = bcm4377_create_transfer_ring(bcm4377, &bcm4377->hci_h2d_ring);
+ if (ret)
+ goto destroy_sco_event;
+ ret = bcm4377_create_transfer_ring(bcm4377, &bcm4377->hci_d2h_ring);
+ if (ret)
+ goto destroy_hci_h2d;
+ ret = bcm4377_create_transfer_ring(bcm4377, &bcm4377->sco_h2d_ring);
+ if (ret)
+ goto destroy_hci_d2h;
+ ret = bcm4377_create_transfer_ring(bcm4377, &bcm4377->sco_d2h_ring);
+ if (ret)
+ goto destroy_sco_h2d;
+ ret = bcm4377_create_transfer_ring(bcm4377, &bcm4377->acl_h2d_ring);
+ if (ret)
+ goto destroy_sco_d2h;
+ ret = bcm4377_create_transfer_ring(bcm4377, &bcm4377->acl_d2h_ring);
+ if (ret)
+ goto destroy_acl_h2d;
+ dev_dbg(&bcm4377->pdev->dev,
+ "all transfer rings successfully created!\n");
+
+ return 0;
+
+destroy_acl_h2d:
+ bcm4377_destroy_transfer_ring(bcm4377, &bcm4377->acl_h2d_ring);
+destroy_sco_d2h:
+ bcm4377_destroy_transfer_ring(bcm4377, &bcm4377->sco_d2h_ring);
+destroy_sco_h2d:
+ bcm4377_destroy_transfer_ring(bcm4377, &bcm4377->sco_h2d_ring);
+destroy_hci_d2h:
+ bcm4377_destroy_transfer_ring(bcm4377, &bcm4377->hci_h2d_ring);
+destroy_hci_h2d:
+ bcm4377_destroy_transfer_ring(bcm4377, &bcm4377->hci_d2h_ring);
+destroy_sco_event:
+ bcm4377_destroy_completion_ring(bcm4377, &bcm4377->sco_event_ring);
+destroy_sco_ack:
+ bcm4377_destroy_completion_ring(bcm4377, &bcm4377->sco_ack_ring);
+destroy_hci_acl_event:
+ bcm4377_destroy_completion_ring(bcm4377, &bcm4377->hci_acl_event_ring);
+destroy_hci_acl_ack:
+ bcm4377_destroy_completion_ring(bcm4377, &bcm4377->hci_acl_ack_ring);
+
+ dev_err(&bcm4377->pdev->dev, "Creating rings failed with %d\n", ret);
+ return ret;
+}
+
+static int bcm4377_hci_close(struct hci_dev *hdev)
+{
+ struct bcm4377_data *bcm4377 = hci_get_drvdata(hdev);
+
+ dev_dbg(&bcm4377->pdev->dev, "destroying rings in hci_close\n");
+
+ bcm4377_destroy_transfer_ring(bcm4377, &bcm4377->acl_d2h_ring);
+ bcm4377_destroy_transfer_ring(bcm4377, &bcm4377->acl_h2d_ring);
+ bcm4377_destroy_transfer_ring(bcm4377, &bcm4377->sco_d2h_ring);
+ bcm4377_destroy_transfer_ring(bcm4377, &bcm4377->sco_h2d_ring);
+ bcm4377_destroy_transfer_ring(bcm4377, &bcm4377->hci_d2h_ring);
+ bcm4377_destroy_transfer_ring(bcm4377, &bcm4377->hci_h2d_ring);
+
+ bcm4377_destroy_completion_ring(bcm4377, &bcm4377->sco_event_ring);
+ bcm4377_destroy_completion_ring(bcm4377, &bcm4377->sco_ack_ring);
+ bcm4377_destroy_completion_ring(bcm4377, &bcm4377->hci_acl_event_ring);
+ bcm4377_destroy_completion_ring(bcm4377, &bcm4377->hci_acl_ack_ring);
+
+ return 0;
+}
+
+static bool bcm4377_is_valid_bdaddr(struct bcm4377_data *bcm4377,
+ bdaddr_t *addr)
+{
+ if (addr->b[0] != 0x93)
+ return true;
+ if (addr->b[1] != 0x76)
+ return true;
+ if (addr->b[2] != 0x00)
+ return true;
+ if (addr->b[4] != (bcm4377->hw->id & 0xff))
+ return true;
+ if (addr->b[5] != (bcm4377->hw->id >> 8))
+ return true;
+ return false;
+}
+
+static int bcm4377_check_bdaddr(struct bcm4377_data *bcm4377)
+{
+ struct hci_rp_read_bd_addr *bda;
+ struct sk_buff *skb;
+
+ skb = __hci_cmd_sync(bcm4377->hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
+ HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ int err = PTR_ERR(skb);
+
+ dev_err(&bcm4377->pdev->dev, "HCI_OP_READ_BD_ADDR failed (%d)",
+ err);
+ return err;
+ }
+
+ if (skb->len != sizeof(*bda)) {
+ dev_err(&bcm4377->pdev->dev,
+ "HCI_OP_READ_BD_ADDR reply length invalid");
+ kfree_skb(skb);
+ return -EIO;
+ }
+
+ bda = (struct hci_rp_read_bd_addr *)skb->data;
+ if (!bcm4377_is_valid_bdaddr(bcm4377, &bda->bdaddr))
+ set_bit(HCI_QUIRK_INVALID_BDADDR, &bcm4377->hdev->quirks);
+
+ kfree_skb(skb);
+ return 0;
+}
+
+static int bcm4377_hci_setup(struct hci_dev *hdev)
+{
+ struct bcm4377_data *bcm4377 = hci_get_drvdata(hdev);
+ const struct firmware *fw;
+ int ret;
+
+ if (bcm4377->hw->send_calibration) {
+ ret = bcm4377->hw->send_calibration(bcm4377);
+ if (ret)
+ return ret;
+ }
+
+ fw = bcm4377_request_blob(bcm4377, "ptb");
+ if (!fw) {
+ dev_err(&bcm4377->pdev->dev, "failed to load PTB data");
+ return -ENOENT;
+ }
+
+ ret = bcm4377->hw->send_ptb(bcm4377, fw);
+ release_firmware(fw);
+ if (ret)
+ return ret;
+
+ return bcm4377_check_bdaddr(bcm4377);
+}
+
+static int bcm4377_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct bcm4377_data *bcm4377 = hci_get_drvdata(hdev);
+ struct bcm4377_transfer_ring *ring;
+ int ret;
+
+ switch (hci_skb_pkt_type(skb)) {
+ case HCI_COMMAND_PKT:
+ hdev->stat.cmd_tx++;
+ ring = &bcm4377->hci_h2d_ring;
+ break;
+
+ case HCI_ACLDATA_PKT:
+ hdev->stat.acl_tx++;
+ ring = &bcm4377->acl_h2d_ring;
+ break;
+
+ case HCI_SCODATA_PKT:
+ hdev->stat.sco_tx++;
+ ring = &bcm4377->sco_h2d_ring;
+ break;
+
+ default:
+ return -EILSEQ;
+ }
+
+ ret = bcm4377_enqueue(bcm4377, ring, skb->data, skb->len, false);
+ if (ret < 0) {
+ hdev->stat.err_tx++;
+ return ret;
+ }
+
+ hdev->stat.byte_tx += skb->len;
+ kfree_skb(skb);
+ return ret;
+}
+
+static int bcm4377_hci_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
+{
+ struct bcm4377_data *bcm4377 = hci_get_drvdata(hdev);
+ struct sk_buff *skb;
+ int err;
+
+ skb = __hci_cmd_sync(hdev, 0xfc01, 6, bdaddr, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ err = PTR_ERR(skb);
+ dev_err(&bcm4377->pdev->dev,
+ "Change address command failed (%d)", err);
+ return err;
+ }
+ kfree_skb(skb);
+
+ return 0;
+}
+
+static int bcm4377_alloc_transfer_ring(struct bcm4377_data *bcm4377,
+ struct bcm4377_transfer_ring *ring)
+{
+ size_t entry_size;
+
+ spin_lock_init(&ring->lock);
+ ring->payload_size = ALIGN(ring->payload_size, 4);
+ ring->mapped_payload_size = ALIGN(ring->mapped_payload_size, 4);
+
+ if (ring->payload_size > BCM4377_XFER_RING_MAX_INPLACE_PAYLOAD_SIZE)
+ return -EINVAL;
+ if (ring->n_entries > BCM4377_MAX_RING_SIZE)
+ return -EINVAL;
+ if (ring->virtual && ring->allow_wait)
+ return -EINVAL;
+
+ if (ring->d2h_buffers_only) {
+ if (ring->virtual)
+ return -EINVAL;
+ if (ring->payload_size)
+ return -EINVAL;
+ if (!ring->mapped_payload_size)
+ return -EINVAL;
+ }
+ if (ring->virtual)
+ return 0;
+
+ entry_size =
+ ring->payload_size + sizeof(struct bcm4377_xfer_ring_entry);
+ ring->ring = dmam_alloc_coherent(&bcm4377->pdev->dev,
+ ring->n_entries * entry_size,
+ &ring->ring_dma, GFP_KERNEL);
+ if (!ring->ring)
+ return -ENOMEM;
+
+ if (ring->allow_wait) {
+ ring->events = devm_kcalloc(&bcm4377->pdev->dev,
+ ring->n_entries,
+ sizeof(*ring->events), GFP_KERNEL);
+ if (!ring->events)
+ return -ENOMEM;
+ }
+
+ if (ring->mapped_payload_size) {
+ ring->payloads = dmam_alloc_coherent(
+ &bcm4377->pdev->dev,
+ ring->n_entries * ring->mapped_payload_size,
+ &ring->payloads_dma, GFP_KERNEL);
+ if (!ring->payloads)
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int bcm4377_alloc_completion_ring(struct bcm4377_data *bcm4377,
+ struct bcm4377_completion_ring *ring)
+{
+ size_t entry_size;
+
+ ring->payload_size = ALIGN(ring->payload_size, 4);
+ if (ring->payload_size > BCM4377_XFER_RING_MAX_INPLACE_PAYLOAD_SIZE)
+ return -EINVAL;
+ if (ring->n_entries > BCM4377_MAX_RING_SIZE)
+ return -EINVAL;
+
+ entry_size = ring->payload_size +
+ sizeof(struct bcm4377_completion_ring_entry);
+
+ ring->ring = dmam_alloc_coherent(&bcm4377->pdev->dev,
+ ring->n_entries * entry_size,
+ &ring->ring_dma, GFP_KERNEL);
+ if (!ring->ring)
+ return -ENOMEM;
+ return 0;
+}
+
+static int bcm4377_init_context(struct bcm4377_data *bcm4377)
+{
+ struct device *dev = &bcm4377->pdev->dev;
+ dma_addr_t peripheral_info_dma;
+
+ bcm4377->ctx = dmam_alloc_coherent(dev, sizeof(*bcm4377->ctx),
+ &bcm4377->ctx_dma, GFP_KERNEL);
+ if (!bcm4377->ctx)
+ return -ENOMEM;
+ memset(bcm4377->ctx, 0, sizeof(*bcm4377->ctx));
+
+ bcm4377->ring_state =
+ dmam_alloc_coherent(dev, sizeof(*bcm4377->ring_state),
+ &bcm4377->ring_state_dma, GFP_KERNEL);
+ if (!bcm4377->ring_state)
+ return -ENOMEM;
+ memset(bcm4377->ring_state, 0, sizeof(*bcm4377->ring_state));
+
+ bcm4377->ctx->version = cpu_to_le16(1);
+ bcm4377->ctx->size = cpu_to_le16(sizeof(*bcm4377->ctx));
+ bcm4377->ctx->enabled_caps = cpu_to_le32(2);
+
+ /*
+ * The BT device will write 0x20 bytes of data to this buffer but
+ * the exact contents are unknown. It only needs to exist for BT
+ * to work such that we can just allocate and then ignore it.
+ */
+ if (!dmam_alloc_coherent(&bcm4377->pdev->dev, 0x20,
+ &peripheral_info_dma, GFP_KERNEL))
+ return -ENOMEM;
+ bcm4377->ctx->peripheral_info_addr = cpu_to_le64(peripheral_info_dma);
+
+ bcm4377->ctx->xfer_ring_heads_addr = cpu_to_le64(
+ bcm4377->ring_state_dma +
+ offsetof(struct bcm4377_ring_state, xfer_ring_head));
+ bcm4377->ctx->xfer_ring_tails_addr = cpu_to_le64(
+ bcm4377->ring_state_dma +
+ offsetof(struct bcm4377_ring_state, xfer_ring_tail));
+ bcm4377->ctx->completion_ring_heads_addr = cpu_to_le64(
+ bcm4377->ring_state_dma +
+ offsetof(struct bcm4377_ring_state, completion_ring_head));
+ bcm4377->ctx->completion_ring_tails_addr = cpu_to_le64(
+ bcm4377->ring_state_dma +
+ offsetof(struct bcm4377_ring_state, completion_ring_tail));
+
+ bcm4377->ctx->n_completion_rings =
+ cpu_to_le16(BCM4377_N_COMPLETION_RINGS);
+ bcm4377->ctx->n_xfer_rings = cpu_to_le16(BCM4377_N_TRANSFER_RINGS);
+
+ bcm4377->ctx->control_completion_ring_addr =
+ cpu_to_le64(bcm4377->control_ack_ring.ring_dma);
+ bcm4377->ctx->control_completion_ring_n_entries =
+ cpu_to_le16(bcm4377->control_ack_ring.n_entries);
+ bcm4377->ctx->control_completion_ring_doorbell = cpu_to_le16(0xffff);
+ bcm4377->ctx->control_completion_ring_msi = 0;
+ bcm4377->ctx->control_completion_ring_header_size = 0;
+ bcm4377->ctx->control_completion_ring_footer_size = 0;
+
+ bcm4377->ctx->control_xfer_ring_addr =
+ cpu_to_le64(bcm4377->control_h2d_ring.ring_dma);
+ bcm4377->ctx->control_xfer_ring_n_entries =
+ cpu_to_le16(bcm4377->control_h2d_ring.n_entries);
+ bcm4377->ctx->control_xfer_ring_doorbell =
+ cpu_to_le16(bcm4377->control_h2d_ring.doorbell);
+ bcm4377->ctx->control_xfer_ring_msi = 0;
+ bcm4377->ctx->control_xfer_ring_header_size = 0;
+ bcm4377->ctx->control_xfer_ring_footer_size =
+ bcm4377->control_h2d_ring.payload_size / 4;
+
+ dev_dbg(&bcm4377->pdev->dev, "context initialized at IOVA %pad",
+ &bcm4377->ctx_dma);
+
+ return 0;
+}
+
+static int bcm4377_prepare_rings(struct bcm4377_data *bcm4377)
+{
+ int ret;
+
+ /*
+ * Even though many of these settings appear to be configurable
+ * when sending the "create ring" messages most of these are
+ * actually hardcoded in some (and quite possibly all) firmware versions
+ * and changing them on the host has no effect.
+ * Specifically, this applies to at least the doorbells, the transfer
+ * and completion ring ids and their mapping (e.g. both HCI and ACL
+ * entries will always be queued in completion rings 1 and 2 no matter
+ * what we configure here).
+ */
+ bcm4377->control_ack_ring.ring_id = BCM4377_ACK_RING_CONTROL;
+ bcm4377->control_ack_ring.n_entries = 32;
+ bcm4377->control_ack_ring.transfer_rings =
+ BIT(BCM4377_XFER_RING_CONTROL);
+
+ bcm4377->hci_acl_ack_ring.ring_id = BCM4377_ACK_RING_HCI_ACL;
+ bcm4377->hci_acl_ack_ring.n_entries = 2 * BCM4377_RING_N_ENTRIES;
+ bcm4377->hci_acl_ack_ring.transfer_rings =
+ BIT(BCM4377_XFER_RING_HCI_H2D) | BIT(BCM4377_XFER_RING_ACL_H2D);
+ bcm4377->hci_acl_ack_ring.delay = 1000;
+
+ /*
+ * A payload size of MAX_EVENT_PAYLOAD_SIZE is enough here since large
+ * ACL packets will be transmitted inside buffers mapped via
+ * acl_d2h_ring anyway.
+ */
+ bcm4377->hci_acl_event_ring.ring_id = BCM4377_EVENT_RING_HCI_ACL;
+ bcm4377->hci_acl_event_ring.payload_size = MAX_EVENT_PAYLOAD_SIZE;
+ bcm4377->hci_acl_event_ring.n_entries = 2 * BCM4377_RING_N_ENTRIES;
+ bcm4377->hci_acl_event_ring.transfer_rings =
+ BIT(BCM4377_XFER_RING_HCI_D2H) | BIT(BCM4377_XFER_RING_ACL_D2H);
+ bcm4377->hci_acl_event_ring.delay = 1000;
+
+ bcm4377->sco_ack_ring.ring_id = BCM4377_ACK_RING_SCO;
+ bcm4377->sco_ack_ring.n_entries = BCM4377_RING_N_ENTRIES;
+ bcm4377->sco_ack_ring.transfer_rings = BIT(BCM4377_XFER_RING_SCO_H2D);
+
+ bcm4377->sco_event_ring.ring_id = BCM4377_EVENT_RING_SCO;
+ bcm4377->sco_event_ring.payload_size = MAX_SCO_PAYLOAD_SIZE;
+ bcm4377->sco_event_ring.n_entries = BCM4377_RING_N_ENTRIES;
+ bcm4377->sco_event_ring.transfer_rings = BIT(BCM4377_XFER_RING_SCO_D2H);
+
+ bcm4377->control_h2d_ring.ring_id = BCM4377_XFER_RING_CONTROL;
+ bcm4377->control_h2d_ring.doorbell = BCM4377_DOORBELL_CONTROL;
+ bcm4377->control_h2d_ring.payload_size = BCM4377_CONTROL_MSG_SIZE;
+ bcm4377->control_h2d_ring.completion_ring = BCM4377_ACK_RING_CONTROL;
+ bcm4377->control_h2d_ring.allow_wait = true;
+ bcm4377->control_h2d_ring.n_entries = BCM4377_RING_N_ENTRIES;
+
+ bcm4377->hci_h2d_ring.ring_id = BCM4377_XFER_RING_HCI_H2D;
+ bcm4377->hci_h2d_ring.doorbell = BCM4377_DOORBELL_HCI_H2D;
+ bcm4377->hci_h2d_ring.payload_size = MAX_EVENT_PAYLOAD_SIZE;
+ bcm4377->hci_h2d_ring.completion_ring = BCM4377_ACK_RING_HCI_ACL;
+ bcm4377->hci_h2d_ring.n_entries = BCM4377_RING_N_ENTRIES;
+
+ bcm4377->hci_d2h_ring.ring_id = BCM4377_XFER_RING_HCI_D2H;
+ bcm4377->hci_d2h_ring.doorbell = BCM4377_DOORBELL_HCI_D2H;
+ bcm4377->hci_d2h_ring.completion_ring = BCM4377_EVENT_RING_HCI_ACL;
+ bcm4377->hci_d2h_ring.virtual = true;
+ bcm4377->hci_d2h_ring.n_entries = BCM4377_RING_N_ENTRIES;
+
+ bcm4377->sco_h2d_ring.ring_id = BCM4377_XFER_RING_SCO_H2D;
+ bcm4377->sco_h2d_ring.doorbell = BCM4377_DOORBELL_SCO;
+ bcm4377->sco_h2d_ring.payload_size = MAX_SCO_PAYLOAD_SIZE;
+ bcm4377->sco_h2d_ring.completion_ring = BCM4377_ACK_RING_SCO;
+ bcm4377->sco_h2d_ring.sync = true;
+ bcm4377->sco_h2d_ring.n_entries = BCM4377_RING_N_ENTRIES;
+
+ bcm4377->sco_d2h_ring.ring_id = BCM4377_XFER_RING_SCO_D2H;
+ bcm4377->sco_d2h_ring.doorbell = BCM4377_DOORBELL_SCO;
+ bcm4377->sco_d2h_ring.completion_ring = BCM4377_EVENT_RING_SCO;
+ bcm4377->sco_d2h_ring.virtual = true;
+ bcm4377->sco_d2h_ring.sync = true;
+ bcm4377->sco_d2h_ring.n_entries = BCM4377_RING_N_ENTRIES;
+
+ /*
+ * This ring has to use mapped_payload_size because the largest ACL
+ * packet doesn't fit inside the largest possible footer
+ */
+ bcm4377->acl_h2d_ring.ring_id = BCM4377_XFER_RING_ACL_H2D;
+ bcm4377->acl_h2d_ring.doorbell = BCM4377_DOORBELL_ACL_H2D;
+ bcm4377->acl_h2d_ring.mapped_payload_size = MAX_ACL_PAYLOAD_SIZE;
+ bcm4377->acl_h2d_ring.completion_ring = BCM4377_ACK_RING_HCI_ACL;
+ bcm4377->acl_h2d_ring.n_entries = BCM4377_RING_N_ENTRIES;
+
+ /*
+ * This ring only contains empty buffers to be used by incoming
+ * ACL packets that do not fit inside the footer of hci_acl_event_ring
+ */
+ bcm4377->acl_d2h_ring.ring_id = BCM4377_XFER_RING_ACL_D2H;
+ bcm4377->acl_d2h_ring.doorbell = BCM4377_DOORBELL_ACL_D2H;
+ bcm4377->acl_d2h_ring.completion_ring = BCM4377_EVENT_RING_HCI_ACL;
+ bcm4377->acl_d2h_ring.d2h_buffers_only = true;
+ bcm4377->acl_d2h_ring.mapped_payload_size = MAX_ACL_PAYLOAD_SIZE;
+ bcm4377->acl_d2h_ring.n_entries = BCM4377_RING_N_ENTRIES;
+
+ /*
+ * no need for any cleanup since this is only called from _probe
+ * and only devres-managed allocations are used
+ */
+ ret = bcm4377_alloc_transfer_ring(bcm4377, &bcm4377->control_h2d_ring);
+ if (ret)
+ return ret;
+ ret = bcm4377_alloc_transfer_ring(bcm4377, &bcm4377->hci_h2d_ring);
+ if (ret)
+ return ret;
+ ret = bcm4377_alloc_transfer_ring(bcm4377, &bcm4377->hci_d2h_ring);
+ if (ret)
+ return ret;
+ ret = bcm4377_alloc_transfer_ring(bcm4377, &bcm4377->sco_h2d_ring);
+ if (ret)
+ return ret;
+ ret = bcm4377_alloc_transfer_ring(bcm4377, &bcm4377->sco_d2h_ring);
+ if (ret)
+ return ret;
+ ret = bcm4377_alloc_transfer_ring(bcm4377, &bcm4377->acl_h2d_ring);
+ if (ret)
+ return ret;
+ ret = bcm4377_alloc_transfer_ring(bcm4377, &bcm4377->acl_d2h_ring);
+ if (ret)
+ return ret;
+
+ ret = bcm4377_alloc_completion_ring(bcm4377,
+ &bcm4377->control_ack_ring);
+ if (ret)
+ return ret;
+ ret = bcm4377_alloc_completion_ring(bcm4377,
+ &bcm4377->hci_acl_ack_ring);
+ if (ret)
+ return ret;
+ ret = bcm4377_alloc_completion_ring(bcm4377,
+ &bcm4377->hci_acl_event_ring);
+ if (ret)
+ return ret;
+ ret = bcm4377_alloc_completion_ring(bcm4377, &bcm4377->sco_ack_ring);
+ if (ret)
+ return ret;
+ ret = bcm4377_alloc_completion_ring(bcm4377, &bcm4377->sco_event_ring);
+ if (ret)
+ return ret;
+
+ dev_dbg(&bcm4377->pdev->dev, "all rings allocated and prepared\n");
+
+ return 0;
+}
+
+static int bcm4377_boot(struct bcm4377_data *bcm4377)
+{
+ const struct firmware *fw;
+ void *bfr;
+ dma_addr_t fw_dma;
+ int ret = 0;
+ u32 bootstage, rti_status;
+
+ bootstage = ioread32(bcm4377->bar2 + BCM4377_BAR2_BOOTSTAGE);
+ rti_status = ioread32(bcm4377->bar2 + BCM4377_BAR2_RTI_STATUS);
+
+ if (bootstage != 0) {
+ dev_err(&bcm4377->pdev->dev, "bootstage is %d and not 0\n",
+ bootstage);
+ return -EINVAL;
+ }
+
+ if (rti_status != 0) {
+ dev_err(&bcm4377->pdev->dev, "RTI status is %d and not 0\n",
+ rti_status);
+ return -EINVAL;
+ }
+
+ fw = bcm4377_request_blob(bcm4377, "bin");
+ if (!fw) {
+ dev_err(&bcm4377->pdev->dev, "Failed to load firmware\n");
+ return -ENOENT;
+ }
+
+ bfr = dma_alloc_coherent(&bcm4377->pdev->dev, fw->size, &fw_dma,
+ GFP_KERNEL);
+ if (!bfr) {
+ ret = -ENOMEM;
+ goto out_release_fw;
+ }
+
+ memcpy(bfr, fw->data, fw->size);
+
+ iowrite32(0, bcm4377->bar0 + BCM4377_BAR0_HOST_WINDOW_LO);
+ iowrite32(0, bcm4377->bar0 + BCM4377_BAR0_HOST_WINDOW_HI);
+ iowrite32(BCM4377_DMA_MASK,
+ bcm4377->bar0 + BCM4377_BAR0_HOST_WINDOW_SIZE);
+
+ iowrite32(lower_32_bits(fw_dma), bcm4377->bar2 + BCM4377_BAR2_FW_LO);
+ iowrite32(upper_32_bits(fw_dma), bcm4377->bar2 + BCM4377_BAR2_FW_HI);
+ iowrite32(fw->size, bcm4377->bar2 + BCM4377_BAR2_FW_SIZE);
+ iowrite32(0, bcm4377->bar0 + BCM4377_BAR0_FW_DOORBELL);
+
+ dev_dbg(&bcm4377->pdev->dev, "waiting for firmware to boot\n");
+
+ ret = wait_for_completion_interruptible_timeout(&bcm4377->event,
+ BCM4377_TIMEOUT);
+ if (ret == 0) {
+ ret = -ETIMEDOUT;
+ goto out_dma_free;
+ } else if (ret < 0) {
+ goto out_dma_free;
+ }
+
+ if (bcm4377->bootstage != 2) {
+ dev_err(&bcm4377->pdev->dev, "boostage %d != 2\n",
+ bcm4377->bootstage);
+ ret = -ENXIO;
+ goto out_dma_free;
+ }
+
+ dev_dbg(&bcm4377->pdev->dev, "firmware has booted (stage = %x)\n",
+ bcm4377->bootstage);
+ ret = 0;
+
+out_dma_free:
+ dma_free_coherent(&bcm4377->pdev->dev, fw->size, bfr, fw_dma);
+out_release_fw:
+ release_firmware(fw);
+ return ret;
+}
+
+static int bcm4377_setup_rti(struct bcm4377_data *bcm4377)
+{
+ int ret;
+
+ dev_dbg(&bcm4377->pdev->dev, "starting RTI\n");
+ iowrite32(1, bcm4377->bar0 + BCM4377_BAR0_RTI_CONTROL);
+
+ ret = wait_for_completion_interruptible_timeout(&bcm4377->event,
+ BCM4377_TIMEOUT);
+ if (ret == 0) {
+ dev_err(&bcm4377->pdev->dev,
+ "timed out while waiting for RTI to transition to state 1");
+ return -ETIMEDOUT;
+ } else if (ret < 0) {
+ return ret;
+ }
+
+ if (bcm4377->rti_status != 1) {
+ dev_err(&bcm4377->pdev->dev, "RTI did not ack state 1 (%d)\n",
+ bcm4377->rti_status);
+ return -ENODEV;
+ }
+ dev_dbg(&bcm4377->pdev->dev, "RTI is in state 1\n");
+
+ /* allow access to the entire IOVA space again */
+ iowrite32(0, bcm4377->bar2 + BCM4377_BAR2_RTI_WINDOW_LO);
+ iowrite32(0, bcm4377->bar2 + BCM4377_BAR2_RTI_WINDOW_HI);
+ iowrite32(BCM4377_DMA_MASK,
+ bcm4377->bar2 + BCM4377_BAR2_RTI_WINDOW_SIZE);
+
+ /* setup "Converged IPC" context */
+ iowrite32(lower_32_bits(bcm4377->ctx_dma),
+ bcm4377->bar2 + BCM4377_BAR2_CONTEXT_ADDR_LO);
+ iowrite32(upper_32_bits(bcm4377->ctx_dma),
+ bcm4377->bar2 + BCM4377_BAR2_CONTEXT_ADDR_HI);
+ iowrite32(2, bcm4377->bar0 + BCM4377_BAR0_RTI_CONTROL);
+
+ ret = wait_for_completion_interruptible_timeout(&bcm4377->event,
+ BCM4377_TIMEOUT);
+ if (ret == 0) {
+ dev_err(&bcm4377->pdev->dev,
+ "timed out while waiting for RTI to transition to state 2");
+ return -ETIMEDOUT;
+ } else if (ret < 0) {
+ return ret;
+ }
+
+ if (bcm4377->rti_status != 2) {
+ dev_err(&bcm4377->pdev->dev, "RTI did not ack state 2 (%d)\n",
+ bcm4377->rti_status);
+ return -ENODEV;
+ }
+
+ dev_dbg(&bcm4377->pdev->dev,
+ "RTI is in state 2; control ring is ready\n");
+ bcm4377->control_ack_ring.enabled = true;
+
+ return 0;
+}
+
+static int bcm4377_parse_otp_board_params(struct bcm4377_data *bcm4377,
+ char tag, const char *val, size_t len)
+{
+ if (tag != 'V')
+ return 0;
+ if (len >= sizeof(bcm4377->vendor))
+ return -EINVAL;
+
+ strscpy(bcm4377->vendor, val, len + 1);
+ return 0;
+}
+
+static int bcm4377_parse_otp_chip_params(struct bcm4377_data *bcm4377, char tag,
+ const char *val, size_t len)
+{
+ size_t idx = 0;
+
+ if (tag != 's')
+ return 0;
+ if (len >= sizeof(bcm4377->stepping))
+ return -EINVAL;
+
+ while (len != 0) {
+ bcm4377->stepping[idx] = tolower(val[idx]);
+ if (val[idx] == '\0')
+ return 0;
+
+ idx++;
+ len--;
+ }
+
+ bcm4377->stepping[idx] = '\0';
+ return 0;
+}
+
+static int bcm4377_parse_otp_str(struct bcm4377_data *bcm4377, const u8 *str,
+ enum bcm4377_otp_params_type type)
+{
+ const char *p;
+ int ret;
+
+ p = skip_spaces(str);
+ while (*p) {
+ char tag = *p++;
+ const char *end;
+ size_t len;
+
+ if (*p++ != '=') /* implicit NUL check */
+ return -EINVAL;
+
+ /* *p might be NUL here, if so end == p and len == 0 */
+ end = strchrnul(p, ' ');
+ len = end - p;
+
+ /* leave 1 byte for NUL in destination string */
+ if (len > (BCM4377_OTP_MAX_PARAM_LEN - 1))
+ return -EINVAL;
+
+ switch (type) {
+ case BCM4377_OTP_BOARD_PARAMS:
+ ret = bcm4377_parse_otp_board_params(bcm4377, tag, p,
+ len);
+ break;
+ case BCM4377_OTP_CHIP_PARAMS:
+ ret = bcm4377_parse_otp_chip_params(bcm4377, tag, p,
+ len);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ if (ret)
+ return ret;
+
+ /* Skip to next arg, if any */
+ p = skip_spaces(end);
+ }
+
+ return 0;
+}
+
+static int bcm4377_parse_otp_sys_vendor(struct bcm4377_data *bcm4377, u8 *otp,
+ size_t size)
+{
+ int idx = 4;
+ const char *chip_params;
+ const char *board_params;
+ int ret;
+
+ /* 4-byte header and two empty strings */
+ if (size < 6)
+ return -EINVAL;
+
+ if (get_unaligned_le32(otp) != BCM4377_OTP_VENDOR_HDR)
+ return -EINVAL;
+
+ chip_params = &otp[idx];
+
+ /* Skip first string, including terminator */
+ idx += strnlen(chip_params, size - idx) + 1;
+ if (idx >= size)
+ return -EINVAL;
+
+ board_params = &otp[idx];
+
+ /* Skip to terminator of second string */
+ idx += strnlen(board_params, size - idx);
+ if (idx >= size)
+ return -EINVAL;
+
+ /* At this point both strings are guaranteed NUL-terminated */
+ dev_dbg(&bcm4377->pdev->dev,
+ "OTP: chip_params='%s' board_params='%s'\n", chip_params,
+ board_params);
+
+ ret = bcm4377_parse_otp_str(bcm4377, chip_params,
+ BCM4377_OTP_CHIP_PARAMS);
+ if (ret)
+ return ret;
+
+ ret = bcm4377_parse_otp_str(bcm4377, board_params,
+ BCM4377_OTP_BOARD_PARAMS);
+ if (ret)
+ return ret;
+
+ if (!bcm4377->stepping[0] || !bcm4377->vendor[0])
+ return -EINVAL;
+
+ dev_dbg(&bcm4377->pdev->dev, "OTP: stepping=%s, vendor=%s\n",
+ bcm4377->stepping, bcm4377->vendor);
+ return 0;
+}
+
+static int bcm4377_parse_otp(struct bcm4377_data *bcm4377)
+{
+ u8 *otp;
+ int i;
+ int ret = -ENOENT;
+
+ otp = kzalloc(BCM4377_OTP_SIZE, GFP_KERNEL);
+ if (!otp)
+ return -ENOMEM;
+
+ for (i = 0; i < BCM4377_OTP_SIZE; ++i)
+ otp[i] = ioread8(bcm4377->bar0 + bcm4377->hw->otp_offset + i);
+
+ i = 0;
+ while (i < (BCM4377_OTP_SIZE - 1)) {
+ u8 type = otp[i];
+ u8 length = otp[i + 1];
+
+ if (type == 0)
+ break;
+
+ if ((i + 2 + length) > BCM4377_OTP_SIZE)
+ break;
+
+ switch (type) {
+ case BCM4377_OTP_SYS_VENDOR:
+ dev_dbg(&bcm4377->pdev->dev,
+ "OTP @ 0x%x (%d): SYS_VENDOR", i, length);
+ ret = bcm4377_parse_otp_sys_vendor(bcm4377, &otp[i + 2],
+ length);
+ break;
+ case BCM4377_OTP_CIS:
+ dev_dbg(&bcm4377->pdev->dev, "OTP @ 0x%x (%d): CIS", i,
+ length);
+ break;
+ default:
+ dev_dbg(&bcm4377->pdev->dev, "OTP @ 0x%x (%d): unknown",
+ i, length);
+ break;
+ }
+
+ i += 2 + length;
+ }
+
+ kfree(otp);
+ return ret;
+}
+
+static int bcm4377_init_cfg(struct bcm4377_data *bcm4377)
+{
+ int ret;
+ u32 ctrl;
+
+ ret = pci_write_config_dword(bcm4377->pdev,
+ BCM4377_PCIECFG_BAR0_WINDOW1,
+ bcm4377->hw->bar0_window1);
+ if (ret)
+ return ret;
+
+ ret = pci_write_config_dword(bcm4377->pdev,
+ BCM4377_PCIECFG_BAR0_WINDOW2,
+ bcm4377->hw->bar0_window2);
+ if (ret)
+ return ret;
+
+ ret = pci_write_config_dword(
+ bcm4377->pdev, BCM4377_PCIECFG_BAR0_CORE2_WINDOW1,
+ BCM4377_PCIECFG_BAR0_CORE2_WINDOW1_DEFAULT);
+ if (ret)
+ return ret;
+
+ if (bcm4377->hw->has_bar0_core2_window2) {
+ ret = pci_write_config_dword(bcm4377->pdev,
+ BCM4377_PCIECFG_BAR0_CORE2_WINDOW2,
+ bcm4377->hw->bar0_core2_window2);
+ if (ret)
+ return ret;
+ }
+
+ ret = pci_write_config_dword(bcm4377->pdev, BCM4377_PCIECFG_BAR2_WINDOW,
+ BCM4377_PCIECFG_BAR2_WINDOW_DEFAULT);
+ if (ret)
+ return ret;
+
+ ret = pci_read_config_dword(bcm4377->pdev,
+ BCM4377_PCIECFG_SUBSYSTEM_CTRL, &ctrl);
+ if (ret)
+ return ret;
+
+ if (bcm4377->hw->clear_pciecfg_subsystem_ctrl_bit19)
+ ctrl &= ~BIT(19);
+ ctrl |= BIT(16);
+
+ return pci_write_config_dword(bcm4377->pdev,
+ BCM4377_PCIECFG_SUBSYSTEM_CTRL, ctrl);
+}
+
+static int bcm4377_probe_dmi(struct bcm4377_data *bcm4377)
+{
+ const struct dmi_system_id *board_type_dmi_id;
+
+ board_type_dmi_id = dmi_first_match(bcm4377_dmi_board_table);
+ if (board_type_dmi_id && board_type_dmi_id->driver_data) {
+ bcm4377->board_type = board_type_dmi_id->driver_data;
+ dev_dbg(&bcm4377->pdev->dev,
+ "found board type via DMI match: %s\n",
+ bcm4377->board_type);
+ }
+
+ return 0;
+}
+
+static int bcm4377_probe_of(struct bcm4377_data *bcm4377)
+{
+ struct device_node *np = bcm4377->pdev->dev.of_node;
+ int ret;
+
+ if (!np)
+ return 0;
+
+ ret = of_property_read_string(np, "brcm,board-type",
+ &bcm4377->board_type);
+ if (ret) {
+ dev_err(&bcm4377->pdev->dev, "no brcm,board-type property\n");
+ return ret;
+ }
+
+ bcm4377->taurus_beamforming_cal_blob =
+ of_get_property(np, "brcm,taurus-bf-cal-blob",
+ &bcm4377->taurus_beamforming_cal_size);
+ if (!bcm4377->taurus_beamforming_cal_blob) {
+ dev_err(&bcm4377->pdev->dev,
+ "no brcm,taurus-bf-cal-blob property\n");
+ return -ENOENT;
+ }
+ bcm4377->taurus_cal_blob = of_get_property(np, "brcm,taurus-cal-blob",
+ &bcm4377->taurus_cal_size);
+ if (!bcm4377->taurus_cal_blob) {
+ dev_err(&bcm4377->pdev->dev,
+ "no brcm,taurus-cal-blob property\n");
+ return -ENOENT;
+ }
+
+ return 0;
+}
+
+static void bcm4377_disable_aspm(struct bcm4377_data *bcm4377)
+{
+ pci_disable_link_state(bcm4377->pdev,
+ PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1);
+
+ /*
+ * pci_disable_link_state can fail if either CONFIG_PCIEASPM is disabled
+ * or if the BIOS hasn't handed over control to us. We must *always*
+ * disable ASPM for this device due to hardware errata though.
+ */
+ pcie_capability_clear_word(bcm4377->pdev, PCI_EXP_LNKCTL,
+ PCI_EXP_LNKCTL_ASPMC);
+}
+
+static void bcm4377_pci_free_irq_vectors(void *data)
+{
+ pci_free_irq_vectors(data);
+}
+
+static void bcm4377_hci_free_dev(void *data)
+{
+ hci_free_dev(data);
+}
+
+static void bcm4377_hci_unregister_dev(void *data)
+{
+ hci_unregister_dev(data);
+}
+
+static int bcm4377_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct bcm4377_data *bcm4377;
+ struct hci_dev *hdev;
+ int ret, irq;
+
+ ret = dma_set_mask_and_coherent(&pdev->dev, BCM4377_DMA_MASK);
+ if (ret)
+ return ret;
+
+ bcm4377 = devm_kzalloc(&pdev->dev, sizeof(*bcm4377), GFP_KERNEL);
+ if (!bcm4377)
+ return -ENOMEM;
+
+ bcm4377->pdev = pdev;
+ bcm4377->hw = &bcm4377_hw_variants[id->driver_data];
+ init_completion(&bcm4377->event);
+
+ ret = bcm4377_prepare_rings(bcm4377);
+ if (ret)
+ return ret;
+
+ ret = bcm4377_init_context(bcm4377);
+ if (ret)
+ return ret;
+
+ ret = bcm4377_probe_dmi(bcm4377);
+ if (ret)
+ return ret;
+ ret = bcm4377_probe_of(bcm4377);
+ if (ret)
+ return ret;
+ if (!bcm4377->board_type) {
+ dev_err(&pdev->dev, "unable to determine board type\n");
+ return -ENODEV;
+ }
+
+ if (bcm4377->hw->disable_aspm)
+ bcm4377_disable_aspm(bcm4377);
+
+ ret = pci_reset_function_locked(pdev);
+ if (ret)
+ dev_warn(
+ &pdev->dev,
+ "function level reset failed with %d; trying to continue anyway\n",
+ ret);
+
+ /*
+ * If this number is too low and we try to access any BAR too
+ * early the device will crash. Experiments have shown that
+ * approximately 50 msec is the minimum amount we have to wait.
+ * Let's double that to be safe.
+ */
+ msleep(100);
+
+ ret = pci_enable_device(pdev);
+ if (ret)
+ return ret;
+ pci_set_master(pdev);
+
+ ret = bcm4377_init_cfg(bcm4377);
+ if (ret)
+ return ret;
+
+ bcm4377->bar0 = pcim_iomap(pdev, 0, 0);
+ if (!bcm4377->bar0)
+ return -EBUSY;
+ bcm4377->bar2 = pcim_iomap(pdev, 2, 0);
+ if (!bcm4377->bar2)
+ return -EBUSY;
+
+ ret = bcm4377_parse_otp(bcm4377);
+ if (ret) {
+ dev_err(&pdev->dev, "Reading OTP failed with %d\n", ret);
+ return ret;
+ }
+
+ /*
+ * Legacy interrupts result in an IRQ storm because we don't know where
+ * the interrupt mask and status registers for these chips are.
+ * MSIs are acked automatically instead.
+ */
+ ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI);
+ if (ret < 0)
+ return -ENODEV;
+ ret = devm_add_action_or_reset(&pdev->dev, bcm4377_pci_free_irq_vectors,
+ pdev);
+ if (ret)
+ return ret;
+
+ irq = pci_irq_vector(pdev, 0);
+ if (irq <= 0)
+ return -ENODEV;
+
+ ret = devm_request_irq(&pdev->dev, irq, bcm4377_irq, 0, "bcm4377",
+ bcm4377);
+ if (ret)
+ return ret;
+
+ hdev = hci_alloc_dev();
+ if (!hdev)
+ return -ENOMEM;
+ ret = devm_add_action_or_reset(&pdev->dev, bcm4377_hci_free_dev, hdev);
+ if (ret)
+ return ret;
+
+ bcm4377->hdev = hdev;
+
+ hdev->bus = HCI_PCI;
+ hdev->dev_type = HCI_PRIMARY;
+ hdev->open = bcm4377_hci_open;
+ hdev->close = bcm4377_hci_close;
+ hdev->send = bcm4377_hci_send_frame;
+ hdev->set_bdaddr = bcm4377_hci_set_bdaddr;
+ hdev->setup = bcm4377_hci_setup;
+
+ set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
+ if (bcm4377->hw->broken_mws_transport_config)
+ set_bit(HCI_QUIRK_BROKEN_MWS_TRANSPORT_CONFIG, &hdev->quirks);
+ if (bcm4377->hw->broken_ext_scan)
+ set_bit(HCI_QUIRK_BROKEN_EXT_SCAN, &hdev->quirks);
+
+ pci_set_drvdata(pdev, bcm4377);
+ hci_set_drvdata(hdev, bcm4377);
+ SET_HCIDEV_DEV(hdev, &pdev->dev);
+
+ ret = bcm4377_boot(bcm4377);
+ if (ret)
+ return ret;
+
+ ret = bcm4377_setup_rti(bcm4377);
+ if (ret)
+ return ret;
+
+ ret = hci_register_dev(hdev);
+ if (ret)
+ return ret;
+ return devm_add_action_or_reset(&pdev->dev, bcm4377_hci_unregister_dev,
+ hdev);
+}
+
+static int bcm4377_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct bcm4377_data *bcm4377 = pci_get_drvdata(pdev);
+ int ret;
+
+ ret = hci_suspend_dev(bcm4377->hdev);
+ if (ret)
+ return ret;
+
+ iowrite32(BCM4377_BAR0_SLEEP_CONTROL_QUIESCE,
+ bcm4377->bar0 + BCM4377_BAR0_SLEEP_CONTROL);
+
+ return 0;
+}
+
+static int bcm4377_resume(struct pci_dev *pdev)
+{
+ struct bcm4377_data *bcm4377 = pci_get_drvdata(pdev);
+
+ iowrite32(BCM4377_BAR0_SLEEP_CONTROL_UNQUIESCE,
+ bcm4377->bar0 + BCM4377_BAR0_SLEEP_CONTROL);
+
+ return hci_resume_dev(bcm4377->hdev);
+}
+
+static const struct dmi_system_id bcm4377_dmi_board_table[] = {
+ {
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir9,1"),
+ },
+ .driver_data = "apple,formosa",
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro15,4"),
+ },
+ .driver_data = "apple,formosa",
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,3"),
+ },
+ .driver_data = "apple,formosa",
+ },
+ {}
+};
+
+static const struct bcm4377_hw bcm4377_hw_variants[] = {
+ [BCM4377] = {
+ .id = 0x4377,
+ .otp_offset = 0x4120,
+ .bar0_window1 = 0x1800b000,
+ .bar0_window2 = 0x1810c000,
+ .disable_aspm = true,
+ .broken_ext_scan = true,
+ .send_ptb = bcm4377_send_ptb,
+ },
+
+ [BCM4378] = {
+ .id = 0x4378,
+ .otp_offset = 0x4120,
+ .bar0_window1 = 0x18002000,
+ .bar0_window2 = 0x1810a000,
+ .bar0_core2_window2 = 0x18107000,
+ .has_bar0_core2_window2 = true,
+ .broken_mws_transport_config = true,
+ .send_calibration = bcm4378_send_calibration,
+ .send_ptb = bcm4378_send_ptb,
+ },
+
+ [BCM4387] = {
+ .id = 0x4387,
+ .otp_offset = 0x413c,
+ .bar0_window1 = 0x18002000,
+ .bar0_window2 = 0x18109000,
+ .bar0_core2_window2 = 0x18106000,
+ .has_bar0_core2_window2 = true,
+ .clear_pciecfg_subsystem_ctrl_bit19 = true,
+ .broken_mws_transport_config = true,
+ .send_calibration = bcm4387_send_calibration,
+ .send_ptb = bcm4378_send_ptb,
+ },
+};
+
+#define BCM4377_DEVID_ENTRY(id) \
+ { \
+ PCI_VENDOR_ID_BROADCOM, BCM##id##_DEVICE_ID, PCI_ANY_ID, \
+ PCI_ANY_ID, PCI_CLASS_NETWORK_OTHER << 8, 0xffff00, \
+ BCM##id \
+ }
+
+static const struct pci_device_id bcm4377_devid_table[] = {
+ BCM4377_DEVID_ENTRY(4377),
+ BCM4377_DEVID_ENTRY(4378),
+ BCM4377_DEVID_ENTRY(4387),
+ {},
+};
+MODULE_DEVICE_TABLE(pci, bcm4377_devid_table);
+
+static struct pci_driver bcm4377_pci_driver = {
+ .name = "hci_bcm4377",
+ .id_table = bcm4377_devid_table,
+ .probe = bcm4377_probe,
+ .suspend = bcm4377_suspend,
+ .resume = bcm4377_resume,
+};
+module_pci_driver(bcm4377_pci_driver);
+
+MODULE_AUTHOR("Sven Peter <sven@...npeter.dev>");
+MODULE_DESCRIPTION("Bluetooth support for Broadcom 4377/4378/4387 devices");
+MODULE_LICENSE("Dual MIT/GPL");
+MODULE_FIRMWARE("brcm/brcmbt4377*.bin");
+MODULE_FIRMWARE("brcm/brcmbt4377*.ptb");
+MODULE_FIRMWARE("brcm/brcmbt4378*.bin");
+MODULE_FIRMWARE("brcm/brcmbt4378*.ptb");
+MODULE_FIRMWARE("brcm/brcmbt4387*.bin");
+MODULE_FIRMWARE("brcm/brcmbt4387*.ptb");
--
2.25.1
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