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Subject[PATCH 2/2] slimbus: ngd: Add qcom SLIMBus NGD driver
Date
This patch adds suppor to Qualcomm SLIMBus Non-Generic Device (NGD)
controller driver.
This is light-weight SLIMBus controller driver responsible for
communicating with slave HW directly over the bus using messaging
interface, and communicating with master component residing on ADSP
for bandwidth and data-channel management

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
drivers/slimbus/Kconfig | 10 +
drivers/slimbus/Makefile | 3 +
drivers/slimbus/qcom-ngd-ctrl.c | 1298 +++++++++++++++++++++++++++++++++++++++
drivers/slimbus/slimbus.h | 8 +
4 files changed, 1319 insertions(+)
create mode 100644 drivers/slimbus/qcom-ngd-ctrl.c

diff --git a/drivers/slimbus/Kconfig b/drivers/slimbus/Kconfig
index 1a632fad597e..8c5d81c5d73b 100644
--- a/drivers/slimbus/Kconfig
+++ b/drivers/slimbus/Kconfig
@@ -21,4 +21,14 @@ config SLIM_QCOM_CTRL
Select driver if Qualcomm's SLIMbus Manager Component is
programmed using Linux kernel.

+config SLIM_QCOM_NGD_CTRL
+ tristate "Qualcomm SLIMbus Satellite Non-Generic Device Component"
+ depends on QCOM_QMI_HELPERS
+ help
+ Select driver if Qualcomm's SLIMbus Satellite Non-Generic Device
+ Component is programmed using Linux kernel.
+ This is light-weight slimbus controller driver responsible for
+ communicating with slave HW directly over the bus using messaging
+ interface, and communicating with master component residing on ADSP
+ for bandwidth and data-channel management.
endif
diff --git a/drivers/slimbus/Makefile b/drivers/slimbus/Makefile
index a35a3da4eb78..c78c6e16c2df 100644
--- a/drivers/slimbus/Makefile
+++ b/drivers/slimbus/Makefile
@@ -8,3 +8,6 @@ slimbus-y := core.o messaging.o sched.o
#Controllers
obj-$(CONFIG_SLIM_QCOM_CTRL) += slim-qcom-ctrl.o
slim-qcom-ctrl-y := qcom-ctrl.o
+
+obj-$(CONFIG_SLIM_QCOM_NGD_CTRL) += slim-qcom-ngd-ctrl.o
+slim-qcom-ngd-ctrl-y := qcom-ngd-ctrl.o
diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c
new file mode 100644
index 000000000000..a74bbf3b08df
--- /dev/null
+++ b/drivers/slimbus/qcom-ngd-ctrl.c
@@ -0,0 +1,1298 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2011-2017, The Linux Foundation. All rights reserved.
+// Copyright (c) 2018, Linaro Limited
+
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/slimbus.h>
+#include <linux/delay.h>
+#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/io.h>
+#include <linux/soc/qcom/qmi.h>
+#include <net/sock.h>
+#include "slimbus.h"
+
+#define NGD_BASE_V1(r) (((r) % 2) ? 0x800 : 0xA00)
+#define NGD_BASE_V2(r) (((r) % 2) ? 0x1000 : 0x2000)
+#define NGD_BASE(r, v) ((v) ? NGD_BASE_V2(r) : NGD_BASE_V1(r))
+
+/* NGD (Non-ported Generic Device) registers */
+#define NGD_CFG 0x0
+#define NGD_CFG_ENABLE BIT(0)
+#define NGD_CFG_RX_MSGQ_EN BIT(1)
+#define NGD_CFG_TX_MSGQ_EN BIT(2)
+#define NGD_STATUS 0x4
+#define NGD_LADDR BIT(1)
+#define NGD_RX_MSGQ_CFG 0x8
+#define NGD_INT_EN 0x10
+#define NGD_INT_RECFG_DONE BIT(24)
+#define NGD_INT_TX_NACKED_2 BIT(25)
+#define NGD_INT_MSG_BUF_CONTE BIT(26)
+#define NGD_INT_MSG_TX_INVAL BIT(27)
+#define NGD_INT_IE_VE_CHG BIT(28)
+#define NGD_INT_DEV_ERR BIT(29)
+#define NGD_INT_RX_MSG_RCVD BIT(30)
+#define NGD_INT_TX_MSG_SENT BIT(31)
+#define NGD_INT_STAT 0x14
+#define NGD_INT_CLR 0x18
+#define DEF_NGD_INT_MASK (NGD_INT_TX_NACKED_2 | NGD_INT_MSG_BUF_CONTE | \
+ NGD_INT_MSG_TX_INVAL | NGD_INT_IE_VE_CHG | \
+ NGD_INT_DEV_ERR | NGD_INT_TX_MSG_SENT | \
+ NGD_INT_RX_MSG_RCVD)
+
+/* Slimbus QMI service */
+#define SLIMBUS_QMI_SVC_ID 0x0301
+#define SLIMBUS_QMI_SVC_V1 1
+#define SLIMBUS_QMI_INS_ID 0
+#define SLIMBUS_QMI_SELECT_INSTANCE_REQ_V01 0x0020
+#define SLIMBUS_QMI_SELECT_INSTANCE_RESP_V01 0x0020
+#define SLIMBUS_QMI_POWER_REQ_V01 0x0021
+#define SLIMBUS_QMI_POWER_RESP_V01 0x0021
+#define SLIMBUS_QMI_CHECK_FRAMER_STATUS_REQ 0x0022
+#define SLIMBUS_QMI_CHECK_FRAMER_STATUS_RESP 0x0022
+#define SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN 14
+#define SLIMBUS_QMI_POWER_RESP_MAX_MSG_LEN 7
+#define SLIMBUS_QMI_SELECT_INSTANCE_REQ_MAX_MSG_LEN 14
+#define SLIMBUS_QMI_SELECT_INSTANCE_RESP_MAX_MSG_LEN 7
+#define SLIMBUS_QMI_CHECK_FRAMER_STAT_RESP_MAX_MSG_LEN 7
+/* QMI response timeout of 500ms */
+#define SLIMBUS_QMI_RESP_TOUT 1000
+
+/* User defined commands */
+#define SLIM_USR_MC_GENERIC_ACK 0x25
+#define SLIM_USR_MC_MASTER_CAPABILITY 0x0
+#define SLIM_USR_MC_REPORT_SATELLITE 0x1
+#define SLIM_USR_MC_ADDR_QUERY 0xD
+#define SLIM_USR_MC_ADDR_REPLY 0xE
+#define SLIM_USR_MC_DEFINE_CHAN 0x20
+#define SLIM_USR_MC_DEF_ACT_CHAN 0x21
+#define SLIM_USR_MC_CHAN_CTRL 0x23
+#define SLIM_USR_MC_RECONFIG_NOW 0x24
+#define SLIM_USR_MC_REQ_BW 0x28
+#define SLIM_USR_MC_CONNECT_SRC 0x2C
+#define SLIM_USR_MC_CONNECT_SINK 0x2D
+#define SLIM_USR_MC_DISCONNECT_PORT 0x2E
+#define SLIM_USR_MC_REPEAT_CHANGE_VALUE 0x0
+
+#define QCOM_SLIM_NGD_AUTOSUSPEND MSEC_PER_SEC
+#define SLIM_RX_MSGQ_TIMEOUT_VAL 0x10000
+
+#define SLIM_LA_MGR 0xFF
+#define SLIM_ROOT_FREQ 24576000
+#define LADDR_RETRY 5
+
+/* Per spec.max 40 bytes per received message */
+#define SLIM_MSGQ_BUF_LEN 40
+#define QCOM_SLIM_NGD_DESC_NUM 32
+
+#define SLIM_MSG_ASM_FIRST_WORD(l, mt, mc, dt, ad) \
+ ((l) | ((mt) << 5) | ((mc) << 8) | ((dt) << 15) | ((ad) << 16))
+
+#define INIT_MX_RETRIES 10
+#define DEF_RETRY_MS 10
+#define SAT_MAGIC_LSB 0xD9
+#define SAT_MAGIC_MSB 0xC5
+#define SAT_MSG_VER 0x1
+#define SAT_MSG_PROT 0x1
+
+enum qcom_slim_ngd_state {
+ QCOM_SLIM_NGD_CTRL_AWAKE,
+ QCOM_SLIM_NGD_CTRL_IDLE,
+ QCOM_SLIM_NGD_CTRL_ASLEEP,
+ QCOM_SLIM_NGD_CTRL_DOWN,
+};
+
+struct qcom_slim_ngd_qmi {
+ struct qmi_handle qmi;
+ struct sockaddr_qrtr svc_info;
+ struct qmi_handle svc_event_hdl;
+ struct qmi_response_type_v01 resp;
+ struct qmi_handle *handle;
+ struct completion qmi_comp;
+};
+
+struct qcom_slim_ngd_ctrl;
+
+struct qcom_slim_ngd_dma_desc {
+ struct dma_async_tx_descriptor *desc;
+ struct qcom_slim_ngd_ctrl *ctrl;
+ struct completion *comp;
+ dma_cookie_t cookie;
+ dma_addr_t phys;
+ void *base;
+};
+
+struct qcom_slim_ngd_ctrl {
+ struct slim_controller ctrl;
+ struct slim_framer framer;
+ struct qcom_slim_ngd_qmi qmi;
+ struct device *dev;
+ void __iomem *base;
+#ifdef CONFIG_DMA_ENGINE
+ /* DMA stuff */
+ struct dma_chan *dma_rx_channel;
+ struct dma_chan *dma_tx_channel;
+ struct qcom_slim_ngd_dma_desc rx_desc[QCOM_SLIM_NGD_DESC_NUM];
+ struct qcom_slim_ngd_dma_desc txdesc[QCOM_SLIM_NGD_DESC_NUM];
+#endif
+ struct completion reconf;
+ struct work_struct m_work;
+ struct workqueue_struct *mwq;
+ spinlock_t tx_buf_lock;
+ enum qcom_slim_ngd_state state;
+ dma_addr_t rx_phys_base;
+ dma_addr_t tx_phys_base;
+ void *rx_base;
+ void *tx_base;
+ int tx_tail;
+ int tx_head;
+ int id;
+ u32 ver;
+};
+
+enum slimbus_mode_enum_type_v01 {
+ /* To force a 32 bit signed enum. Do not change or use*/
+ SLIMBUS_MODE_ENUM_TYPE_MIN_ENUM_VAL_V01 = INT_MIN,
+ SLIMBUS_MODE_SATELLITE_V01 = 1,
+ SLIMBUS_MODE_MASTER_V01 = 2,
+ SLIMBUS_MODE_ENUM_TYPE_MAX_ENUM_VAL_V01 = INT_MAX,
+};
+
+enum slimbus_pm_enum_type_v01 {
+ /* To force a 32 bit signed enum. Do not change or use*/
+ SLIMBUS_PM_ENUM_TYPE_MIN_ENUM_VAL_V01 = INT_MIN,
+ SLIMBUS_PM_INACTIVE_V01 = 1,
+ SLIMBUS_PM_ACTIVE_V01 = 2,
+ SLIMBUS_PM_ENUM_TYPE_MAX_ENUM_VAL_V01 = INT_MAX,
+};
+
+enum slimbus_resp_enum_type_v01 {
+ SLIMBUS_RESP_ENUM_TYPE_MIN_VAL_V01 = INT_MIN,
+ SLIMBUS_RESP_SYNCHRONOUS_V01 = 1,
+ SLIMBUS_RESP_ENUM_TYPE_MAX_VAL_V01 = INT_MAX,
+};
+
+struct slimbus_select_inst_req_msg_v01 {
+ uint32_t instance;
+ uint8_t mode_valid;
+ enum slimbus_mode_enum_type_v01 mode;
+};
+
+struct slimbus_select_inst_resp_msg_v01 {
+ struct qmi_response_type_v01 resp;
+};
+
+struct slimbus_power_req_msg_v01 {
+ enum slimbus_pm_enum_type_v01 pm_req;
+ uint8_t resp_type_valid;
+ enum slimbus_resp_enum_type_v01 resp_type;
+};
+
+struct slimbus_power_resp_msg_v01 {
+ struct qmi_response_type_v01 resp;
+};
+
+static struct qmi_elem_info slimbus_select_inst_req_msg_v01_ei[] = {
+ {
+ .data_type = QMI_UNSIGNED_4_BYTE,
+ .elem_len = 1,
+ .elem_size = sizeof(uint32_t),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x01,
+ .offset = offsetof(struct slimbus_select_inst_req_msg_v01,
+ instance),
+ .ei_array = NULL,
+ },
+ {
+ .data_type = QMI_OPT_FLAG,
+ .elem_len = 1,
+ .elem_size = sizeof(uint8_t),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x10,
+ .offset = offsetof(struct slimbus_select_inst_req_msg_v01,
+ mode_valid),
+ .ei_array = NULL,
+ },
+ {
+ .data_type = QMI_UNSIGNED_4_BYTE,
+ .elem_len = 1,
+ .elem_size = sizeof(enum slimbus_mode_enum_type_v01),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x10,
+ .offset = offsetof(struct slimbus_select_inst_req_msg_v01,
+ mode),
+ .ei_array = NULL,
+ },
+ {
+ .data_type = QMI_EOTI,
+ .elem_len = 0,
+ .elem_size = 0,
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x00,
+ .offset = 0,
+ .ei_array = NULL,
+ },
+};
+
+static struct qmi_elem_info slimbus_select_inst_resp_msg_v01_ei[] = {
+ {
+ .data_type = QMI_STRUCT,
+ .elem_len = 1,
+ .elem_size = sizeof(struct qmi_response_type_v01),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x02,
+ .offset = offsetof(struct slimbus_select_inst_resp_msg_v01,
+ resp),
+ .ei_array = qmi_response_type_v01_ei,
+ },
+ {
+ .data_type = QMI_EOTI,
+ .elem_len = 0,
+ .elem_size = 0,
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x00,
+ .offset = 0,
+ .ei_array = NULL,
+ },
+};
+
+static struct qmi_elem_info slimbus_power_req_msg_v01_ei[] = {
+ {
+ .data_type = QMI_UNSIGNED_4_BYTE,
+ .elem_len = 1,
+ .elem_size = sizeof(enum slimbus_pm_enum_type_v01),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x01,
+ .offset = offsetof(struct slimbus_power_req_msg_v01,
+ pm_req),
+ .ei_array = NULL,
+ },
+ {
+ .data_type = QMI_OPT_FLAG,
+ .elem_len = 1,
+ .elem_size = sizeof(uint8_t),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x10,
+ .offset = offsetof(struct slimbus_power_req_msg_v01,
+ resp_type_valid),
+ },
+ {
+ .data_type = QMI_SIGNED_4_BYTE_ENUM,
+ .elem_len = 1,
+ .elem_size = sizeof(enum slimbus_resp_enum_type_v01),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x10,
+ .offset = offsetof(struct slimbus_power_req_msg_v01,
+ resp_type),
+ },
+ {
+ .data_type = QMI_EOTI,
+ .elem_len = 0,
+ .elem_size = 0,
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x00,
+ .offset = 0,
+ .ei_array = NULL,
+ },
+};
+
+static struct qmi_elem_info slimbus_power_resp_msg_v01_ei[] = {
+ {
+ .data_type = QMI_STRUCT,
+ .elem_len = 1,
+ .elem_size = sizeof(struct qmi_response_type_v01),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x02,
+ .offset = offsetof(struct slimbus_power_resp_msg_v01, resp),
+ .ei_array = qmi_response_type_v01_ei,
+ },
+ {
+ .data_type = QMI_EOTI,
+ .elem_len = 0,
+ .elem_size = 0,
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x00,
+ .offset = 0,
+ .ei_array = NULL,
+ },
+};
+
+static int qcom_slim_qmi_send_select_inst_req(struct qcom_slim_ngd_ctrl *ctrl,
+ struct slimbus_select_inst_req_msg_v01 *req)
+{
+ struct slimbus_select_inst_resp_msg_v01 resp = { { 0, 0 } };
+ struct qmi_txn txn;
+ int rc;
+
+ rc = qmi_txn_init(ctrl->qmi.handle, &txn,
+ slimbus_select_inst_resp_msg_v01_ei, &resp);
+ if (rc < 0) {
+ dev_err(ctrl->dev, "%s: QMI TXN init fail: %d\n", __func__, rc);
+ return rc;
+ }
+
+ rc = qmi_send_request(ctrl->qmi.handle, NULL, &txn,
+ SLIMBUS_QMI_SELECT_INSTANCE_REQ_V01,
+ SLIMBUS_QMI_SELECT_INSTANCE_REQ_MAX_MSG_LEN,
+ slimbus_select_inst_req_msg_v01_ei, req);
+ if (rc < 0) {
+ dev_err(ctrl->dev, "%s: QMI send req fail %d\n", __func__, rc);
+ qmi_txn_cancel(&txn);
+ return rc;
+ }
+
+ rc = qmi_txn_wait(&txn, SLIMBUS_QMI_RESP_TOUT);
+ if (rc < 0) {
+ dev_err(ctrl->dev, "%s: QMI TXN wait fail: %d\n", __func__, rc);
+ return rc;
+ }
+ /* Check the response */
+ if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
+ dev_err(ctrl->dev, "%s: QMI request failed 0x%x\n",
+ __func__, resp.resp.result);
+ return -EREMOTEIO;
+ }
+
+ return 0;
+}
+
+static void qcom_slim_qmi_power_resp_cb(struct qmi_handle *handle,
+ struct sockaddr_qrtr *sq,
+ struct qmi_txn *txn, const void *data)
+{
+ struct slimbus_power_resp_msg_v01 *resp;
+
+ resp = (struct slimbus_power_resp_msg_v01 *)data;
+ if (resp->resp.result != QMI_RESULT_SUCCESS_V01)
+ pr_err("%s: QMI power request failed 0x%x\n", __func__,
+ resp->resp.result);
+
+ complete(&txn->completion);
+}
+
+static int qcom_slim_qmi_send_power_request(struct qcom_slim_ngd_ctrl *ctrl,
+ struct slimbus_power_req_msg_v01 *req)
+{
+ struct slimbus_power_resp_msg_v01 resp = { { 0, 0 } };
+ struct qmi_txn txn;
+ int rc;
+
+ rc = qmi_txn_init(ctrl->qmi.handle, &txn,
+ slimbus_power_resp_msg_v01_ei, &resp);
+
+ rc = qmi_send_request(ctrl->qmi.handle, NULL, &txn,
+ SLIMBUS_QMI_POWER_REQ_V01,
+ SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN,
+ slimbus_power_req_msg_v01_ei, req);
+ if (rc < 0) {
+ dev_err(ctrl->dev, "%s: QMI send req fail %d\n", __func__, rc);
+ qmi_txn_cancel(&txn);
+ }
+
+ if (rc < 0)
+ return rc;
+
+ rc = qmi_txn_wait(&txn, SLIMBUS_QMI_RESP_TOUT);
+ if (rc < 0) {
+ dev_err(ctrl->dev, "%s: QMI TXN wait fail: %d\n", __func__, rc);
+ return rc;
+ }
+
+ /* Check the response */
+ if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
+ dev_err(ctrl->dev, "%s: QMI request failed 0x%x\n",
+ __func__, resp.resp.result);
+ return -EREMOTEIO;
+ }
+
+ return 0;
+}
+
+static struct qmi_msg_handler qcom_slim_qmi_msg_handlers[] = {
+ {
+ .type = QMI_RESPONSE,
+ .msg_id = SLIMBUS_QMI_POWER_RESP_V01,
+ .ei = slimbus_power_resp_msg_v01_ei,
+ .decoded_size = sizeof(struct slimbus_power_resp_msg_v01),
+ .fn = qcom_slim_qmi_power_resp_cb,
+ },
+ {}
+};
+
+static int qcom_slim_qmi_init(struct qcom_slim_ngd_ctrl *ctrl,
+ bool apps_is_master)
+{
+ int rc = 0;
+ struct qmi_handle *handle;
+ struct slimbus_select_inst_req_msg_v01 req;
+
+ handle = devm_kzalloc(ctrl->dev, sizeof(*handle), GFP_KERNEL);
+ if (!handle)
+ return -ENOMEM;
+
+ rc = qmi_handle_init(handle, SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN,
+ NULL, qcom_slim_qmi_msg_handlers);
+ if (rc < 0) {
+ dev_err(ctrl->dev, "QMI client init failed: %d\n", rc);
+ goto qmi_handle_init_failed;
+ }
+
+ rc = kernel_connect(handle->sock,
+ (struct sockaddr *)&ctrl->qmi.svc_info,
+ sizeof(ctrl->qmi.svc_info), 0);
+ if (rc < 0) {
+ dev_err(ctrl->dev, "%s: Remote Service connect failed: %d\n",
+ __func__, rc);
+ goto qmi_connect_to_service_failed;
+ }
+
+ /* Instance is 0 based */
+ req.instance = (ctrl->id >> 1);
+ req.mode_valid = 1;
+
+ /* Mode indicates the role of the ADSP */
+ if (apps_is_master)
+ req.mode = SLIMBUS_MODE_SATELLITE_V01;
+ else
+ req.mode = SLIMBUS_MODE_MASTER_V01;
+
+ ctrl->qmi.handle = handle;
+
+ rc = qcom_slim_qmi_send_select_inst_req(ctrl, &req);
+ if (rc) {
+ dev_err(ctrl->dev, "failed to select h/w instance\n");
+ goto qmi_select_instance_failed;
+ }
+
+ return 0;
+
+qmi_select_instance_failed:
+ ctrl->qmi.handle = NULL;
+qmi_connect_to_service_failed:
+ qmi_handle_release(handle);
+qmi_handle_init_failed:
+ devm_kfree(ctrl->dev, handle);
+ return rc;
+}
+
+static void qcom_slim_qmi_exit(struct qcom_slim_ngd_ctrl *ctrl)
+{
+ if (!ctrl->qmi.handle)
+ return;
+
+ qmi_handle_release(ctrl->qmi.handle);
+ devm_kfree(ctrl->dev, ctrl->qmi.handle);
+ ctrl->qmi.handle = NULL;
+}
+
+static int qcom_slim_qmi_power_request(struct qcom_slim_ngd_ctrl *ctrl,
+ bool active)
+{
+ struct slimbus_power_req_msg_v01 req;
+
+ if (active)
+ req.pm_req = SLIMBUS_PM_ACTIVE_V01;
+ else
+ req.pm_req = SLIMBUS_PM_INACTIVE_V01;
+
+ req.resp_type_valid = 0;
+
+ return qcom_slim_qmi_send_power_request(ctrl, &req);
+}
+
+static u32 *qcom_slim_ngd_tx_msg_get(struct qcom_slim_ngd_ctrl *ctrl, int len,
+ struct completion *comp)
+{
+ struct qcom_slim_ngd_dma_desc *desc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
+
+ if ((ctrl->tx_tail + 1) % QCOM_SLIM_NGD_DESC_NUM == ctrl->tx_head) {
+ spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
+ return NULL;
+ }
+ desc = &ctrl->txdesc[ctrl->tx_tail];
+ desc->base = (u32 *)((u8 *)ctrl->tx_base +
+ (ctrl->tx_tail * SLIM_MSGQ_BUF_LEN));
+ desc->comp = comp;
+ ctrl->tx_tail = (ctrl->tx_tail + 1) % QCOM_SLIM_NGD_DESC_NUM;
+
+ spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
+
+ return desc->base;
+}
+
+static void qcom_slim_ngd_tx_msg_dma_cb(void *args)
+{
+ struct qcom_slim_ngd_dma_desc *desc = args;
+ struct qcom_slim_ngd_ctrl *ctrl = desc->ctrl;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
+
+ if (desc->comp) {
+ complete(desc->comp);
+ desc->comp = NULL;
+ }
+
+ ctrl->tx_head = (ctrl->tx_head + 1) % QCOM_SLIM_NGD_DESC_NUM;
+ spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
+}
+
+static int qcom_slim_ngd_tx_msg_post(struct qcom_slim_ngd_ctrl *ctrl,
+ void *buf, int len)
+{
+ struct qcom_slim_ngd_dma_desc *desc;
+ struct dma_slave_config conf = {
+ .direction = DMA_MEM_TO_DEV,
+ };
+ unsigned long flags;
+ int index, offset;
+
+ spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
+ offset = buf - ctrl->tx_base;
+ index = offset/SLIM_MSGQ_BUF_LEN;
+
+ desc = &ctrl->txdesc[index];
+ desc->phys = ctrl->tx_phys_base + offset;
+ desc->base = ctrl->tx_base + offset;
+ desc->ctrl = ctrl;
+ len = (len + 3) & 0xfc;
+
+ dmaengine_slave_config(ctrl->dma_tx_channel, &conf);
+ desc->desc = dmaengine_prep_slave_single(ctrl->dma_tx_channel,
+ desc->phys, len,
+ DMA_MEM_TO_DEV,
+ DMA_PREP_INTERRUPT);
+ if (!desc->desc) {
+ dev_err(ctrl->dev, "unable to prepare channel\n");
+ spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
+ return -EINVAL;
+ }
+
+ desc->desc->callback = qcom_slim_ngd_tx_msg_dma_cb;
+ desc->desc->callback_param = desc;
+ desc->desc->cookie = dmaengine_submit(desc->desc);
+ dma_async_issue_pending(ctrl->dma_tx_channel);
+ spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
+
+ return 0;
+}
+
+static void qcom_slim_ngd_rx(struct qcom_slim_ngd_ctrl *ctrl, u8 *buf)
+{
+ u8 mc, mt, len;
+
+ mt = SLIM_HEADER_GET_MT(buf[0]);
+ len = SLIM_HEADER_GET_RL(buf[0]);
+ mc = SLIM_HEADER_GET_MC(buf[1]);
+
+ if (mc == SLIM_USR_MC_MASTER_CAPABILITY &&
+ mt == SLIM_MSG_MT_SRC_REFERRED_USER)
+ queue_work(ctrl->mwq, &ctrl->m_work);
+
+ if (mc == SLIM_MSG_MC_REPLY_INFORMATION ||
+ mc == SLIM_MSG_MC_REPLY_VALUE || (mc == SLIM_USR_MC_ADDR_REPLY &&
+ mt == SLIM_MSG_MT_SRC_REFERRED_USER)) {
+ slim_msg_response(&ctrl->ctrl, &buf[4], buf[3], len - 4);
+ pm_runtime_mark_last_busy(ctrl->dev);
+ }
+}
+
+static void qcom_slim_ngd_rx_msgq_cb(void *args)
+{
+ struct qcom_slim_ngd_dma_desc *desc = args;
+ struct qcom_slim_ngd_ctrl *ctrl = desc->ctrl;
+
+ qcom_slim_ngd_rx(ctrl, (u8 *)desc->base);
+ /* Add descriptor back to the queue */
+ desc->desc = dmaengine_prep_slave_single(ctrl->dma_rx_channel,
+ desc->phys, SLIM_MSGQ_BUF_LEN,
+ DMA_DEV_TO_MEM,
+ DMA_PREP_INTERRUPT);
+ if (!desc->desc) {
+ dev_err(ctrl->dev, "Unable to preppare rx channel\n");
+ return;
+ }
+
+ desc->desc->callback = qcom_slim_ngd_rx_msgq_cb;
+ desc->desc->callback_param = desc;
+ desc->desc->cookie = dmaengine_submit(desc->desc);
+ dma_async_issue_pending(ctrl->dma_rx_channel);
+}
+
+static int qcom_slim_ngd_post_rx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
+{
+ struct qcom_slim_ngd_dma_desc *desc;
+ struct dma_slave_config conf = {
+ .direction = DMA_DEV_TO_MEM,
+ };
+ int ret, i;
+
+ ret = dmaengine_slave_config(ctrl->dma_rx_channel, &conf);
+ if (ret)
+ dev_err(ctrl->dev, "Error Configuring rx dma\n");
+
+ for (i = 0; i < QCOM_SLIM_NGD_DESC_NUM; i++) {
+ desc = &ctrl->rx_desc[i];
+ desc->phys = ctrl->rx_phys_base + i * SLIM_MSGQ_BUF_LEN;
+ desc->ctrl = ctrl;
+ desc->base = ctrl->rx_base + i * SLIM_MSGQ_BUF_LEN;
+ desc->desc = dmaengine_prep_slave_single(ctrl->dma_rx_channel,
+ desc->phys, SLIM_MSGQ_BUF_LEN,
+ DMA_DEV_TO_MEM,
+ DMA_PREP_INTERRUPT);
+ if (!desc->desc) {
+ dev_err(ctrl->dev, "Unable to preppare rx channel\n");
+ return -EINVAL;
+ }
+
+ desc->desc->callback = qcom_slim_ngd_rx_msgq_cb;
+ desc->desc->callback_param = desc;
+ desc->desc->cookie = dmaengine_submit(desc->desc);
+ }
+ dma_async_issue_pending(ctrl->dma_rx_channel);
+
+ return 0;
+}
+
+static int qcom_slim_ngd_init_rx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
+{
+ struct device *dev = ctrl->dev;
+ int ret, size;
+
+ ctrl->dma_rx_channel = dma_request_slave_channel(dev, "rx");
+ if (!ctrl->dma_rx_channel) {
+ dev_err(dev, "Failed to request dma channels");
+ return -EINVAL;
+ }
+
+ size = QCOM_SLIM_NGD_DESC_NUM * SLIM_MSGQ_BUF_LEN;
+ ctrl->rx_base = dma_alloc_coherent(dev, size, &ctrl->rx_phys_base,
+ GFP_KERNEL);
+ if (!ctrl->rx_base) {
+ dev_err(dev, "dma_alloc_coherent failed\n");
+ ret = -ENOMEM;
+ goto rel_rx;
+ }
+
+ ret = qcom_slim_ngd_post_rx_msgq(ctrl);
+ if (ret) {
+ dev_err(dev, "post_rx_msgq() failed 0x%x\n", ret);
+ goto rx_post_err;
+ }
+
+ return 0;
+
+rx_post_err:
+ dma_free_coherent(dev, size, ctrl->rx_base, ctrl->rx_phys_base);
+rel_rx:
+ dma_release_channel(ctrl->dma_rx_channel);
+ return ret;
+}
+
+static int qcom_slim_ngd_init_tx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
+{
+ struct device *dev = ctrl->dev;
+ unsigned long flags;
+ int ret = 0;
+ int size;
+
+ ctrl->dma_tx_channel = dma_request_slave_channel(dev, "tx");
+ if (!ctrl->dma_tx_channel) {
+ dev_err(dev, "Failed to request dma channels");
+ return -EINVAL;
+ }
+
+ size = ((QCOM_SLIM_NGD_DESC_NUM + 1) * SLIM_MSGQ_BUF_LEN);
+ ctrl->tx_base = dma_alloc_coherent(dev, size, &ctrl->tx_phys_base,
+ GFP_KERNEL);
+ if (!ctrl->tx_base) {
+ dev_err(dev, "dma_alloc_coherent failed\n");
+ ret = -EINVAL;
+ goto rel_tx;
+ }
+
+ spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
+ ctrl->tx_tail = 0;
+ ctrl->tx_head = 0;
+ spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);
+
+ return 0;
+rel_tx:
+ dma_release_channel(ctrl->dma_tx_channel);
+ return ret;
+}
+
+static int qcom_slim_ngd_init_dma(struct qcom_slim_ngd_ctrl *ctrl)
+{
+ int ret = 0;
+
+ ret = qcom_slim_ngd_init_rx_msgq(ctrl);
+ if (ret) {
+ dev_err(ctrl->dev, "rx dma init failed\n");
+ return ret;
+ }
+
+ ret = qcom_slim_ngd_init_tx_msgq(ctrl);
+ if (ret)
+ dev_err(ctrl->dev, "tx dma init failed\n");
+
+ return ret;
+}
+
+static irqreturn_t qcom_slim_ngd_interrupt(int irq, void *d)
+{
+ struct qcom_slim_ngd_ctrl *ctrl = d;
+ void __iomem *ngd = ctrl->base + NGD_BASE(ctrl->id, ctrl->ver);
+ u32 stat = readl(ngd + NGD_INT_STAT);
+
+ if ((stat & NGD_INT_MSG_BUF_CONTE) ||
+ (stat & NGD_INT_MSG_TX_INVAL) || (stat & NGD_INT_DEV_ERR) ||
+ (stat & NGD_INT_TX_NACKED_2)) {
+ dev_err(ctrl->dev, "Error Interrupt received 0x%x\n", stat);
+ }
+
+ writel(stat, ngd + NGD_INT_CLR);
+
+ return IRQ_HANDLED;
+}
+
+static int qcom_slim_ngd_xfer_msg(struct slim_controller *sctrl,
+ struct slim_msg_txn *txn)
+{
+ struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(sctrl->dev);
+ DECLARE_COMPLETION_ONSTACK(tx_sent);
+ int ret, timeout;
+ u32 *pbuf;
+ u8 *puc;
+
+ if (txn->mc & SLIM_MSG_CLK_PAUSE_SEQ_FLG)
+ return -EPROTONOSUPPORT;
+
+ if (txn->mt == SLIM_MSG_MT_CORE &&
+ (txn->mc >= SLIM_MSG_MC_BEGIN_RECONFIGURATION &&
+ txn->mc <= SLIM_MSG_MC_RECONFIGURE_NOW))
+ return 0;
+
+ if (txn->dt == SLIM_MSG_DEST_ENUMADDR)
+ return -EPROTONOSUPPORT;
+
+ if (txn->msg->num_bytes > SLIM_MSGQ_BUF_LEN ||
+ txn->rl > SLIM_MSGQ_BUF_LEN) {
+ dev_err(ctrl->dev, "msg exeeds HW limit\n");
+ return -EINVAL;
+ }
+
+ pbuf = qcom_slim_ngd_tx_msg_get(ctrl, txn->rl, &tx_sent);
+ if (!pbuf) {
+ dev_err(ctrl->dev, "Message buffer unavailable\n");
+ return -ENOMEM;
+ }
+
+ /* HW expects length field to be excluded */
+ txn->rl--;
+ puc = (u8 *)pbuf;
+ *pbuf = 0;
+ if (txn->dt == SLIM_MSG_DEST_LOGICALADDR) {
+ *pbuf = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt, txn->mc, 0,
+ txn->la);
+ puc += 3;
+ } else {
+ *pbuf = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt, txn->mc, 1,
+ txn->la);
+ puc += 2;
+ }
+
+ if (slim_tid_txn(txn->mt, txn->mc))
+ *(puc++) = txn->tid;
+
+ if (slim_ec_txn(txn->mt, txn->mc)) {
+ *(puc++) = (txn->ec & 0xFF);
+ *(puc++) = (txn->ec >> 8) & 0xFF;
+ }
+
+ if (txn->msg && txn->msg->wbuf)
+ memcpy(puc, txn->msg->wbuf, txn->msg->num_bytes);
+
+ ret = qcom_slim_ngd_tx_msg_post(ctrl, pbuf, txn->rl);
+ if (ret)
+ return ret;
+
+ timeout = wait_for_completion_timeout(&tx_sent, HZ);
+ if (!timeout) {
+ dev_err(sctrl->dev, "TX timed out:MC:0x%x,mt:0x%x", txn->mc,
+ txn->mt);
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int qcom_slim_ngd_get_laddr(struct slim_controller *sctrl,
+ struct slim_eaddr *ea, u8 *laddr)
+{
+ DECLARE_COMPLETION_ONSTACK(done);
+ struct slim_val_inf msg = {0};
+ struct slim_msg_txn txn;
+ u8 wbuf[10] = {0};
+ u8 rbuf[10] = {0};
+ int ret;
+
+ txn.mt = SLIM_MSG_MT_DEST_REFERRED_USER;
+ txn.dt = SLIM_MSG_DEST_LOGICALADDR;
+ txn.la = SLIM_LA_MGR;
+ txn.ec = 0;
+
+ txn.mc = SLIM_USR_MC_ADDR_QUERY;
+ txn.rl = 11;
+ txn.msg = &msg;
+ txn.msg->num_bytes = 7;
+ txn.msg->wbuf = wbuf;
+ txn.msg->rbuf = rbuf;
+
+ ret = slim_prepare_txn(sctrl, &txn, &done, true);
+ if (ret)
+ return ret;
+
+ wbuf[0] = (u8)txn.tid;
+ memcpy(&wbuf[1], ea, sizeof(*ea));
+ ret = slim_do_transfer(sctrl, &txn);
+
+ *laddr = rbuf[6];
+
+ return ret;
+}
+
+static int qcom_slim_ngd_exit_dma(struct qcom_slim_ngd_ctrl *ctrl)
+{
+ if (ctrl->dma_rx_channel)
+ dma_release_channel(ctrl->dma_rx_channel);
+
+ if (ctrl->dma_tx_channel)
+ dma_release_channel(ctrl->dma_tx_channel);
+
+ ctrl->dma_tx_channel = ctrl->dma_rx_channel = NULL;
+
+ return 0;
+}
+
+static void qcom_slim_ngd_setup(struct qcom_slim_ngd_ctrl *ctrl)
+{
+ u32 cfg = readl_relaxed(ctrl->base +
+ NGD_BASE(ctrl->id, ctrl->ver));
+
+ if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN)
+ qcom_slim_ngd_init_dma(ctrl);
+
+ /* By default enable message queues */
+ cfg |= NGD_CFG_RX_MSGQ_EN;
+ cfg |= NGD_CFG_TX_MSGQ_EN;
+
+ /* Enable NGD if it's not already enabled*/
+ if (!(cfg & NGD_CFG_ENABLE))
+ cfg |= NGD_CFG_ENABLE;
+
+ writel_relaxed(cfg, ctrl->base + NGD_BASE(ctrl->id, ctrl->ver));
+}
+
+static int qcom_slim_ngd_power_up(struct qcom_slim_ngd_ctrl *ctrl)
+{
+ enum qcom_slim_ngd_state cur_state = ctrl->state;
+ void __iomem *ngd;
+ u32 laddr, rx_msgq;
+ int timeout, ret = 0;
+
+ if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN) {
+ timeout = wait_for_completion_timeout(&ctrl->qmi.qmi_comp, HZ);
+ if (!timeout)
+ return -EREMOTEIO;
+ }
+
+ if (ctrl->state == QCOM_SLIM_NGD_CTRL_ASLEEP ||
+ ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN) {
+ ret = qcom_slim_qmi_power_request(ctrl, true);
+ if (ret) {
+ dev_err(ctrl->dev, "SLIM QMI power request failed:%d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ ctrl->ver = readl_relaxed(ctrl->base);
+ /* Version info in 16 MSbits */
+ ctrl->ver >>= 16;
+ ngd = ctrl->base + NGD_BASE(ctrl->id, ctrl->ver);
+ laddr = readl_relaxed(ngd + NGD_STATUS);
+ if (laddr & NGD_LADDR) {
+ /*
+ * external MDM restart case where ADSP itself was active framer
+ * For example, modem restarted when playback was active
+ */
+ if (cur_state == QCOM_SLIM_NGD_CTRL_AWAKE) {
+ dev_info(ctrl->dev, "Subsys restart: ADSP active framer\n");
+ return 0;
+ }
+ return 0;
+ }
+
+ writel_relaxed(DEF_NGD_INT_MASK, ctrl->base + NGD_INT_EN +
+ NGD_BASE(ctrl->id, ctrl->ver));
+ rx_msgq = readl_relaxed(ngd + NGD_RX_MSGQ_CFG);
+
+ writel_relaxed(rx_msgq|SLIM_RX_MSGQ_TIMEOUT_VAL, ngd + NGD_RX_MSGQ_CFG);
+ qcom_slim_ngd_setup(ctrl);
+
+ timeout = wait_for_completion_timeout(&ctrl->reconf, HZ);
+ if (!timeout) {
+ dev_err(ctrl->dev, "capability exchange timed-out\n");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static void qcom_slim_ngd_notify_slaves(struct qcom_slim_ngd_ctrl *ctrl)
+{
+ struct slim_device *sbdev;
+ struct device_node *node;
+
+ for_each_child_of_node(ctrl->dev->of_node, node) {
+ sbdev = of_slim_get_device(&ctrl->ctrl, node);
+ if (!sbdev)
+ continue;
+
+ if (slim_get_logical_addr(sbdev))
+ dev_err(ctrl->dev, "Failed to get logical address\n");
+ }
+}
+
+static void qcom_slim_ngd_master_worker(struct work_struct *work)
+{
+ struct qcom_slim_ngd_ctrl *ctrl;
+ struct slim_msg_txn txn;
+ struct slim_val_inf msg = {0};
+ int retries = 0;
+ u8 wbuf[8];
+ int ret = 0;
+
+ ctrl = container_of(work, struct qcom_slim_ngd_ctrl, m_work);
+ txn.dt = SLIM_MSG_DEST_LOGICALADDR;
+ txn.ec = 0;
+ txn.mc = SLIM_USR_MC_REPORT_SATELLITE;
+ txn.mt = SLIM_MSG_MT_SRC_REFERRED_USER;
+ txn.la = SLIM_LA_MGR;
+ wbuf[0] = SAT_MAGIC_LSB;
+ wbuf[1] = SAT_MAGIC_MSB;
+ wbuf[2] = SAT_MSG_VER;
+ wbuf[3] = SAT_MSG_PROT;
+ txn.msg = &msg;
+ txn.msg->wbuf = wbuf;
+ txn.msg->num_bytes = 4;
+ txn.rl = 8;
+
+ dev_info(ctrl->dev, "SLIM SAT: Rcvd master capability\n");
+
+capability_retry:
+ ret = qcom_slim_ngd_xfer_msg(&ctrl->ctrl, &txn);
+ if (!ret) {
+ if (ctrl->state >= QCOM_SLIM_NGD_CTRL_ASLEEP)
+ complete(&ctrl->reconf);
+ else
+ dev_err(ctrl->dev, "unexpected state:%d\n",
+ ctrl->state);
+
+ if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN)
+ qcom_slim_ngd_notify_slaves(ctrl);
+
+ } else if (ret == -EIO) {
+ dev_err(ctrl->dev, "capability message NACKed, retrying\n");
+ if (retries < INIT_MX_RETRIES) {
+ msleep(DEF_RETRY_MS);
+ retries++;
+ goto capability_retry;
+ }
+ } else {
+ dev_err(ctrl->dev, "SLIM: capability TX failed:%d\n", ret);
+ }
+}
+
+static int qcom_slim_ngd_runtime_resume(struct device *dev)
+{
+ struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
+ int ret = 0;
+
+ if (ctrl->state >= QCOM_SLIM_NGD_CTRL_ASLEEP)
+ ret = qcom_slim_ngd_power_up(ctrl);
+ if (ret) {
+ /* Did SSR cause this power up failure */
+ if (ctrl->state != QCOM_SLIM_NGD_CTRL_DOWN)
+ ctrl->state = QCOM_SLIM_NGD_CTRL_ASLEEP;
+ else
+ dev_err(ctrl->dev, "HW wakeup attempt during SSR\n");
+ } else {
+ ctrl->state = QCOM_SLIM_NGD_CTRL_AWAKE;
+ }
+
+ return 0;
+}
+
+static int qcom_slim_ngd_enable(struct qcom_slim_ngd_ctrl *ctrl, bool enable)
+{
+ if (enable) {
+ int ret = qcom_slim_qmi_init(ctrl, false);
+
+ if (ret) {
+ dev_err(ctrl->dev, "qmi init fail, ret:%d, state:%d\n",
+ ret, ctrl->state);
+ return ret;
+ }
+ /* controller state should be in sync with framework state */
+ complete(&ctrl->qmi.qmi_comp);
+ if (!pm_runtime_enabled(ctrl->dev) ||
+ !pm_runtime_suspended(ctrl->dev))
+ qcom_slim_ngd_runtime_resume(ctrl->dev);
+ else
+ pm_runtime_resume(ctrl->dev);
+ pm_runtime_mark_last_busy(ctrl->dev);
+ pm_runtime_put(ctrl->dev);
+ } else {
+ qcom_slim_qmi_exit(ctrl);
+ }
+
+ return 0;
+}
+
+static int qcom_slim_ngd_qmi_new_server(struct qmi_handle *hdl,
+ struct qmi_service *service)
+{
+ struct qcom_slim_ngd_qmi *qmi =
+ container_of(hdl, struct qcom_slim_ngd_qmi, svc_event_hdl);
+ struct qcom_slim_ngd_ctrl *ctrl =
+ container_of(qmi, struct qcom_slim_ngd_ctrl, qmi);
+
+ qmi->svc_info.sq_family = AF_QIPCRTR;
+ qmi->svc_info.sq_node = service->node;
+ qmi->svc_info.sq_port = service->port;
+
+ qcom_slim_ngd_enable(ctrl, true);
+
+ return 0;
+}
+
+static void qcom_slim_ngd_qmi_del_server(struct qmi_handle *hdl,
+ struct qmi_service *service)
+{
+ struct qcom_slim_ngd_qmi *qmi =
+ container_of(hdl, struct qcom_slim_ngd_qmi, svc_event_hdl);
+
+ qmi->svc_info.sq_node = 0;
+ qmi->svc_info.sq_port = 0;
+}
+
+static struct qmi_ops qcom_slim_ngd_qmi_svc_event_ops = {
+ .new_server = qcom_slim_ngd_qmi_new_server,
+ .del_server = qcom_slim_ngd_qmi_del_server,
+};
+
+static int qcom_slim_ngd_qmi_svc_event_init(struct qcom_slim_ngd_qmi *qmi)
+{
+ int ret = 0;
+
+ ret = qmi_handle_init(&qmi->svc_event_hdl, 0,
+ &qcom_slim_ngd_qmi_svc_event_ops, NULL);
+ if (ret < 0) {
+ pr_err("%s: qmi_handle_init failed: %d\n", __func__, ret);
+ return ret;
+ }
+
+ ret = qmi_add_lookup(&qmi->svc_event_hdl, SLIMBUS_QMI_SVC_ID,
+ SLIMBUS_QMI_SVC_V1, SLIMBUS_QMI_INS_ID);
+ if (ret < 0) {
+ pr_err("%s: qmi_add_lookup failed: %d\n", __func__, ret);
+ qmi_handle_release(&qmi->svc_event_hdl);
+ }
+ return ret;
+}
+
+static void qcom_slim_ngd_qmi_svc_event_deinit(struct qcom_slim_ngd_qmi *qmi)
+{
+ qmi_handle_release(&qmi->svc_event_hdl);
+}
+
+static int qcom_slim_ngd_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct qcom_slim_ngd_ctrl *ctrl;
+ struct resource *res;
+ int ret;
+
+ ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
+ if (!ctrl)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, ctrl);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ctrl");
+ ctrl->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(ctrl->base))
+ return PTR_ERR(ctrl->base);
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no slimbus IRQ resource\n");
+ return -ENODEV;
+ }
+
+ ret = devm_request_irq(dev, res->start, qcom_slim_ngd_interrupt,
+ IRQF_TRIGGER_HIGH, "ngd", ctrl);
+ if (ret) {
+ dev_err(&pdev->dev, "request IRQ failed\n");
+ return ret;
+ }
+
+ if (dev->of_node) {
+ ret = of_property_read_u32(dev->of_node, "qcom,ngd-id",
+ &ctrl->id);
+ if (ret) {
+ dev_err(&pdev->dev, "Cell index not specified:%d", ret);
+ return ret;
+ }
+ }
+
+ ctrl->dev = dev;
+ ctrl->framer.rootfreq = SLIM_ROOT_FREQ >> 3;
+ ctrl->framer.superfreq =
+ ctrl->framer.rootfreq / SLIM_CL_PER_SUPERFRAME_DIV8;
+ ctrl->ctrl.dev = &pdev->dev;
+ ctrl->ctrl.a_framer = &ctrl->framer;
+ ctrl->ctrl.clkgear = SLIM_MAX_CLK_GEAR;
+ ctrl->ctrl.get_laddr = qcom_slim_ngd_get_laddr;
+ ctrl->ctrl.xfer_msg = qcom_slim_ngd_xfer_msg;
+ ctrl->ctrl.wakeup = NULL;
+ ctrl->state = QCOM_SLIM_NGD_CTRL_DOWN;
+
+ spin_lock_init(&ctrl->tx_buf_lock);
+ init_completion(&ctrl->reconf);
+ init_completion(&ctrl->qmi.qmi_comp);
+
+ ret = slim_register_controller(&ctrl->ctrl);
+ if (ret) {
+ dev_err(ctrl->dev, "error adding controller\n");
+ return ret;
+ }
+
+ pm_runtime_use_autosuspend(ctrl->dev);
+ pm_runtime_set_autosuspend_delay(ctrl->dev, QCOM_SLIM_NGD_AUTOSUSPEND);
+ pm_runtime_set_suspended(ctrl->dev);
+ pm_runtime_enable(ctrl->dev);
+ pm_runtime_get_noresume(ctrl->dev);
+ ret = qcom_slim_ngd_qmi_svc_event_init(&ctrl->qmi);
+ if (ret) {
+ dev_err(&pdev->dev, "QMI service registration failed:%d", ret);
+ goto err;
+ }
+
+ INIT_WORK(&ctrl->m_work, qcom_slim_ngd_master_worker);
+ ctrl->mwq = create_singlethread_workqueue("ngd_master");
+ if (!ctrl->mwq) {
+ dev_err(&pdev->dev, "Failed to start master worker\n");
+ ret = -ENOMEM;
+ goto wq_err;
+ }
+
+ dev_info(dev, "NGD SB controller is up!\n");
+
+ return 0;
+err:
+ slim_unregister_controller(&ctrl->ctrl);
+wq_err:
+ qcom_slim_ngd_qmi_svc_event_deinit(&ctrl->qmi);
+ if (ctrl->mwq)
+ destroy_workqueue(ctrl->mwq);
+
+ return ret;
+}
+
+static int qcom_slim_ngd_remove(struct platform_device *pdev)
+{
+ struct qcom_slim_ngd_ctrl *ctrl = platform_get_drvdata(pdev);
+
+ pm_runtime_disable(&pdev->dev);
+ slim_unregister_controller(&ctrl->ctrl);
+ qcom_slim_ngd_exit_dma(ctrl);
+ qcom_slim_ngd_qmi_svc_event_deinit(&ctrl->qmi);
+ if (ctrl->mwq)
+ destroy_workqueue(ctrl->mwq);
+
+ return 0;
+}
+
+static int qcom_slim_ngd_runtime_idle(struct device *dev)
+{
+ struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
+
+ if (ctrl->state == QCOM_SLIM_NGD_CTRL_AWAKE)
+ ctrl->state = QCOM_SLIM_NGD_CTRL_IDLE;
+ pm_request_autosuspend(dev);
+ return -EAGAIN;
+}
+
+
+#ifdef CONFIG_PM
+static int qcom_slim_ngd_runtime_suspend(struct device *dev)
+{
+ struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
+ int ret = 0;
+
+ ret = qcom_slim_qmi_power_request(ctrl, false);
+ if (ret && ret != -EBUSY)
+ dev_info(ctrl->dev, "slim resource not idle:%d\n", ret);
+ if (!ret || ret == -ETIMEDOUT)
+ ctrl->state = QCOM_SLIM_NGD_CTRL_ASLEEP;
+
+ return ret;
+}
+#endif
+
+static const struct dev_pm_ops qcom_slim_ngd_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(
+ qcom_slim_ngd_runtime_suspend,
+ qcom_slim_ngd_runtime_resume,
+ qcom_slim_ngd_runtime_idle
+ )
+};
+
+static const struct of_device_id qcom_slim_ngd_dt_match[] = {
+ {
+ .compatible = "qcom,slim-ngd",
+ },
+ {}
+};
+
+MODULE_DEVICE_TABLE(of, qcom_slim_ngd_dt_match);
+
+static struct platform_driver qcom_slim_ngd_driver = {
+ .probe = qcom_slim_ngd_probe,
+ .remove = qcom_slim_ngd_remove,
+ .driver = {
+ .name = "qcom,slim-ngd-ctrl",
+ .owner = THIS_MODULE,
+ .pm = &qcom_slim_ngd_dev_pm_ops,
+ .of_match_table = qcom_slim_ngd_dt_match,
+ },
+};
+
+module_platform_driver(qcom_slim_ngd_driver);
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Qualcomm SLIMBus NGD controller");
diff --git a/drivers/slimbus/slimbus.h b/drivers/slimbus/slimbus.h
index 67e774b2b2dd..f0051b5497c3 100644
--- a/drivers/slimbus/slimbus.h
+++ b/drivers/slimbus/slimbus.h
@@ -17,6 +17,8 @@

/* SLIMbus message types. Related to interpretation of message code. */
#define SLIM_MSG_MT_CORE 0x0
+#define SLIM_MSG_MT_DEST_REFERRED_USER 0x2
+#define SLIM_MSG_MT_SRC_REFERRED_USER 0x6

/*
* SLIM Broadcast header format
@@ -48,6 +50,12 @@
#define SLIM_MSG_MC_NEXT_PAUSE_CLOCK 0x4A
#define SLIM_MSG_MC_RECONFIGURE_NOW 0x5F

+/*
+ * Clock pause flag to indicate that the reconfig message
+ * corresponds to clock pause sequence
+ */
+#define SLIM_MSG_CLK_PAUSE_SEQ_FLG (1U << 8)
+
/* Clock pause values per SLIMbus spec */
#define SLIM_CLK_FAST 0
#define SLIM_CLK_CONST_PHASE 1
--
2.16.2
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