#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/mutex.h>
#include <linux/notifier.h>
#include <linux/remoteproc/qcom_rproc.h>
#include <linux/of.h>
#include <linux/io.h>
#include <linux/soc/qcom/qmi.h>
#include <linux/soc/qcom/pdr.h>
#include <net/sock.h>
#include "slimbus.h"
#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)
#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
#define SLIMBUS_QMI_RESP_TOUT 1000
#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 SLIM_RX_MSGQ_TIMEOUT_VAL 0x10000
#define SLIM_LA_MGR 0xFF
#define SLIM_ROOT_FREQ 24576000
#define LADDR_RETRY 5
#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
#define to_ngd(d) container_of(d, struct qcom_slim_ngd, dev)
struct ngd_reg_offset_data {
u32 offset, size;
};
static const struct ngd_reg_offset_data ngd_v1_5_offset_info = {
.offset = 0x1000,
.size = 0x1000,
};
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;
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 {
struct platform_device *pdev;
void __iomem *base;
int id;
};
struct qcom_slim_ngd_ctrl {
struct slim_framer framer;
struct slim_controller ctrl;
struct qcom_slim_ngd_qmi qmi;
struct qcom_slim_ngd *ngd;
struct device *dev;
void __iomem *base;
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];
struct completion reconf;
struct work_struct m_work;
struct work_struct ngd_up_work;
struct workqueue_struct *mwq;
struct completion qmi_up;
spinlock_t tx_buf_lock;
struct mutex tx_lock;
struct mutex ssr_lock;
struct notifier_block nb;
void *notifier;
struct pdr_handle *pdr;
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;
u32 ver;
};
enum slimbus_mode_enum_type_v01 {
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 {
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 const 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 const 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 const 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 const 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, "QMI TXN init fail: %d\n", 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, "QMI send req fail %d\n", rc);
qmi_txn_cancel(&txn);
return rc;
}
rc = qmi_txn_wait(&txn, SLIMBUS_QMI_RESP_TOUT);
if (rc < 0) {
dev_err(ctrl->dev, "QMI TXN wait fail: %d\n", rc);
return rc;
}
if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
dev_err(ctrl->dev, "QMI request failed 0x%x\n",
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("QMI power request failed 0x%x\n",
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, "QMI send req fail %d\n", rc);
qmi_txn_cancel(&txn);
return rc;
}
rc = qmi_txn_wait(&txn, SLIMBUS_QMI_RESP_TOUT);
if (rc < 0) {
dev_err(ctrl->dev, "QMI TXN wait fail: %d\n", rc);
return rc;
}
if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
dev_err(ctrl->dev, "QMI request failed 0x%x\n",
resp.resp.result);
return -EREMOTEIO;
}
return 0;
}
static const 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)
{
struct slimbus_select_inst_req_msg_v01 req;
struct qmi_handle *handle;
int rc;
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_unsized *)&ctrl->qmi.svc_info,
sizeof(ctrl->qmi.svc_info), 0);
if (rc < 0) {
dev_err(ctrl->dev, "Remote Service connect failed: %d\n", rc);
goto qmi_connect_to_service_failed;
}
req.instance = (ctrl->ngd->id >> 1);
req.mode_valid = 1;
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 = 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;
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;
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) ||
(mc == SLIM_USR_MC_GENERIC_ACK &&
mt == SLIM_MSG_MT_SRC_REFERRED_USER)) {
slim_msg_response(&ctrl->ctrl, &buf[4], buf[3], len - 4);
pm_runtime_mark_last_busy(ctrl->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);
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 prepare 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;
int i;
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 prepare 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_chan(dev, "rx");
if (IS_ERR(ctrl->dma_rx_channel)) {
dev_err(dev, "Failed to request RX dma channel");
ret = PTR_ERR(ctrl->dma_rx_channel);
ctrl->dma_rx_channel = NULL;
return ret;
}
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) {
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_chan(dev, "tx");
if (IS_ERR(ctrl->dma_tx_channel)) {
dev_err(dev, "Failed to request TX dma channel");
ret = PTR_ERR(ctrl->dma_tx_channel);
ctrl->dma_tx_channel = NULL;
return ret;
}
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) {
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 *base = ctrl->ngd->base;
u32 stat;
if (pm_runtime_suspended(ctrl->ctrl.dev)) {
dev_warn_once(ctrl->dev, "Interrupt received while suspended\n");
return IRQ_NONE;
}
stat = readl(base + 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, base + 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);
DECLARE_COMPLETION_ONSTACK(done);
int ret, i;
unsigned long time_left;
u8 wbuf[SLIM_MSGQ_BUF_LEN];
u8 rbuf[SLIM_MSGQ_BUF_LEN];
u32 *pbuf;
u8 *puc;
u8 la = txn->la;
bool usr_msg = false;
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 exceeds 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;
}
if (txn->mt == SLIM_MSG_MT_CORE &&
(txn->mc == SLIM_MSG_MC_CONNECT_SOURCE ||
txn->mc == SLIM_MSG_MC_CONNECT_SINK ||
txn->mc == SLIM_MSG_MC_DISCONNECT_PORT)) {
txn->mt = SLIM_MSG_MT_DEST_REFERRED_USER;
switch (txn->mc) {
case SLIM_MSG_MC_CONNECT_SOURCE:
txn->mc = SLIM_USR_MC_CONNECT_SRC;
break;
case SLIM_MSG_MC_CONNECT_SINK:
txn->mc = SLIM_USR_MC_CONNECT_SINK;
break;
case SLIM_MSG_MC_DISCONNECT_PORT:
txn->mc = SLIM_USR_MC_DISCONNECT_PORT;
break;
default:
return -EINVAL;
}
usr_msg = true;
i = 0;
wbuf[i++] = txn->la;
la = SLIM_LA_MGR;
wbuf[i++] = txn->msg->wbuf[0];
if (txn->mc != SLIM_USR_MC_DISCONNECT_PORT)
wbuf[i++] = txn->msg->wbuf[1];
txn->comp = &done;
ret = slim_alloc_txn_tid(sctrl, txn);
if (ret) {
dev_err(ctrl->dev, "Unable to allocate TID\n");
return ret;
}
wbuf[i++] = txn->tid;
txn->msg->num_bytes = i;
txn->msg->wbuf = wbuf;
txn->msg->rbuf = rbuf;
txn->rl = txn->msg->num_bytes + 4;
}
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,
la);
puc += 3;
} else {
*pbuf = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt, txn->mc, 1,
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);
mutex_lock(&ctrl->tx_lock);
ret = qcom_slim_ngd_tx_msg_post(ctrl, pbuf, txn->rl);
if (ret) {
mutex_unlock(&ctrl->tx_lock);
return ret;
}
time_left = wait_for_completion_timeout(&tx_sent, HZ);
if (!time_left) {
dev_err(sctrl->dev, "TX timed out:MC:0x%x,mt:0x%x", txn->mc,
txn->mt);
mutex_unlock(&ctrl->tx_lock);
return -ETIMEDOUT;
}
if (usr_msg) {
time_left = wait_for_completion_timeout(&done, HZ);
if (!time_left) {
dev_err(sctrl->dev, "TX timed out:MC:0x%x,mt:0x%x",
txn->mc, txn->mt);
mutex_unlock(&ctrl->tx_lock);
return -ETIMEDOUT;
}
}
mutex_unlock(&ctrl->tx_lock);
return 0;
}
static int qcom_slim_ngd_xfer_msg_sync(struct slim_controller *ctrl,
struct slim_msg_txn *txn)
{
DECLARE_COMPLETION_ONSTACK(done);
int ret;
unsigned long time_left;
ret = pm_runtime_get_sync(ctrl->dev);
if (ret < 0)
goto pm_put;
txn->comp = &done;
ret = qcom_slim_ngd_xfer_msg(ctrl, txn);
if (ret)
goto pm_put;
time_left = wait_for_completion_timeout(&done, HZ);
if (!time_left) {
dev_err(ctrl->dev, "TX timed out:MC:0x%x,mt:0x%x", txn->mc,
txn->mt);
ret = -ETIMEDOUT;
goto pm_put;
}
return 0;
pm_put:
pm_runtime_put(ctrl->dev);
return ret;
}
static int qcom_slim_calc_coef(struct slim_stream_runtime *rt, int *exp)
{
struct slim_controller *ctrl = rt->dev->ctrl;
int coef;
if (rt->ratem * ctrl->a_framer->superfreq < rt->rate)
rt->ratem++;
coef = rt->ratem;
*exp = 0;
while (1) {
while ((coef & 0x1) != 0x1) {
coef >>= 1;
*exp = *exp + 1;
}
if (coef <= 3)
break;
coef++;
}
if (coef == 1) {
if (*exp > 9)
return -EIO;
coef = 0;
} else {
if (*exp > 8)
return -EIO;
coef = 1;
}
return coef;
}
static int qcom_slim_ngd_enable_stream(struct slim_stream_runtime *rt)
{
struct slim_device *sdev = rt->dev;
struct slim_controller *ctrl = sdev->ctrl;
struct slim_val_inf msg = {0};
u8 wbuf[SLIM_MSGQ_BUF_LEN];
u8 rbuf[SLIM_MSGQ_BUF_LEN];
struct slim_msg_txn txn = {0,};
int i, ret;
txn.mt = SLIM_MSG_MT_DEST_REFERRED_USER;
txn.dt = SLIM_MSG_DEST_LOGICALADDR;
txn.la = SLIM_LA_MGR;
txn.ec = 0;
txn.msg = &msg;
txn.msg->num_bytes = 0;
txn.msg->wbuf = wbuf;
txn.msg->rbuf = rbuf;
for (i = 0; i < rt->num_ports; i++) {
struct slim_port *port = &rt->ports[i];
if (txn.msg->num_bytes == 0) {
int exp = 0, coef = 0;
wbuf[txn.msg->num_bytes++] = sdev->laddr;
wbuf[txn.msg->num_bytes] = rt->bps >> 2 |
(port->ch.aux_fmt << 6);
coef = qcom_slim_calc_coef(rt, &exp);
if (coef < 0) {
dev_err(&sdev->dev,
"%s: error calculating coef %d\n", __func__,
coef);
return -EIO;
}
if (coef)
wbuf[txn.msg->num_bytes] |= BIT(5);
txn.msg->num_bytes++;
wbuf[txn.msg->num_bytes++] = exp << 4 | rt->prot;
if (rt->prot == SLIM_PROTO_ISO)
wbuf[txn.msg->num_bytes++] =
port->ch.prrate |
SLIM_CHANNEL_CONTENT_FL;
else
wbuf[txn.msg->num_bytes++] = port->ch.prrate;
ret = slim_alloc_txn_tid(ctrl, &txn);
if (ret) {
dev_err(&sdev->dev, "Fail to allocate TID\n");
return -ENXIO;
}
wbuf[txn.msg->num_bytes++] = txn.tid;
}
wbuf[txn.msg->num_bytes++] = port->ch.id;
}
txn.mc = SLIM_USR_MC_DEF_ACT_CHAN;
txn.rl = txn.msg->num_bytes + 4;
ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn);
if (ret) {
slim_free_txn_tid(ctrl, &txn);
dev_err(&sdev->dev, "TX timed out:MC:0x%x,mt:0x%x", txn.mc,
txn.mt);
return ret;
}
txn.mc = SLIM_USR_MC_RECONFIG_NOW;
txn.msg->num_bytes = 2;
wbuf[1] = sdev->laddr;
txn.rl = txn.msg->num_bytes + 4;
ret = slim_alloc_txn_tid(ctrl, &txn);
if (ret) {
dev_err(ctrl->dev, "Fail to allocate TID\n");
return ret;
}
wbuf[0] = txn.tid;
ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn);
if (ret) {
slim_free_txn_tid(ctrl, &txn);
dev_err(&sdev->dev, "TX timed out:MC:0x%x,mt:0x%x", txn.mc,
txn.mt);
}
return ret;
}
static int qcom_slim_ngd_get_laddr(struct slim_controller *ctrl,
struct slim_eaddr *ea, u8 *laddr)
{
struct slim_val_inf msg = {0};
u8 failed_ea[6] = {0, 0, 0, 0, 0, 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_alloc_txn_tid(ctrl, &txn);
if (ret < 0)
return ret;
wbuf[0] = (u8)txn.tid;
memcpy(&wbuf[1], ea, sizeof(*ea));
ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn);
if (ret) {
slim_free_txn_tid(ctrl, &txn);
return ret;
}
if (!memcmp(rbuf, failed_ea, 6))
return -ENXIO;
*laddr = rbuf[6];
return ret;
}
static int qcom_slim_ngd_exit_dma(struct qcom_slim_ngd_ctrl *ctrl)
{
if (ctrl->dma_rx_channel) {
dmaengine_terminate_sync(ctrl->dma_rx_channel);
dma_release_channel(ctrl->dma_rx_channel);
}
if (ctrl->dma_tx_channel) {
dmaengine_terminate_sync(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->ngd->base);
if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN ||
ctrl->state == QCOM_SLIM_NGD_CTRL_ASLEEP)
qcom_slim_ngd_init_dma(ctrl);
cfg |= NGD_CFG_RX_MSGQ_EN;
cfg |= NGD_CFG_TX_MSGQ_EN;
if (!(cfg & NGD_CFG_ENABLE))
cfg |= NGD_CFG_ENABLE;
writel_relaxed(cfg, ctrl->ngd->base);
}
static int qcom_slim_ngd_power_up(struct qcom_slim_ngd_ctrl *ctrl)
{
enum qcom_slim_ngd_state cur_state = ctrl->state;
struct qcom_slim_ngd *ngd = ctrl->ngd;
u32 laddr, rx_msgq;
int ret = 0;
unsigned long time_left;
if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN) {
time_left = wait_for_completion_timeout(&ctrl->qmi.qmi_comp, HZ);
if (!time_left)
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);
ctrl->ver >>= 16;
laddr = readl_relaxed(ngd->base + NGD_STATUS);
if (laddr & NGD_LADDR) {
if (cur_state == QCOM_SLIM_NGD_CTRL_AWAKE) {
dev_info(ctrl->dev, "Subsys restart: ADSP active framer\n");
return 0;
}
qcom_slim_ngd_setup(ctrl);
return 0;
}
reinit_completion(&ctrl->reconf);
writel_relaxed(DEF_NGD_INT_MASK, ngd->base + NGD_INT_EN);
rx_msgq = readl_relaxed(ngd->base + NGD_RX_MSGQ_CFG);
writel_relaxed(rx_msgq|SLIM_RX_MSGQ_TIMEOUT_VAL,
ngd->base + NGD_RX_MSGQ_CFG);
qcom_slim_ngd_setup(ctrl);
time_left = wait_for_completion_timeout(&ctrl->reconf, HZ);
if (!time_left) {
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->ngd->pdev->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");
put_device(&sbdev->dev);
}
}
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_update_device_status(struct device *dev, void *null)
{
slim_report_absent(to_slim_device(dev));
return 0;
}
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->qmi.handle)
return 0;
if (ctrl->state >= QCOM_SLIM_NGD_CTRL_ASLEEP)
ret = qcom_slim_ngd_power_up(ctrl);
if (ret) {
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;
}
complete(&ctrl->qmi.qmi_comp);
if (!pm_runtime_enabled(ctrl->ctrl.dev) ||
!pm_runtime_suspended(ctrl->ctrl.dev))
qcom_slim_ngd_runtime_resume(ctrl->ctrl.dev);
else
pm_runtime_resume(ctrl->ctrl.dev);
pm_runtime_mark_last_busy(ctrl->ctrl.dev);
pm_runtime_put(ctrl->ctrl.dev);
ret = slim_register_controller(&ctrl->ctrl);
if (ret) {
dev_err(ctrl->dev, "error adding slim controller\n");
return ret;
}
dev_info(ctrl->dev, "SLIM controller Registered\n");
} else {
qcom_slim_qmi_exit(ctrl);
slim_unregister_controller(&ctrl->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;
complete(&ctrl->qmi_up);
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);
struct qcom_slim_ngd_ctrl *ctrl =
container_of(qmi, struct qcom_slim_ngd_ctrl, qmi);
reinit_completion(&ctrl->qmi_up);
qmi->svc_info.sq_node = 0;
qmi->svc_info.sq_port = 0;
}
static const 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_ctrl *ctrl)
{
struct qcom_slim_ngd_qmi *qmi = &ctrl->qmi;
int ret;
ret = qmi_handle_init(&qmi->svc_event_hdl, 0,
&qcom_slim_ngd_qmi_svc_event_ops, NULL);
if (ret < 0) {
dev_err(ctrl->dev, "qmi_handle_init failed: %d\n", 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) {
dev_err(ctrl->dev, "qmi_add_lookup failed: %d\n", 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 struct platform_driver qcom_slim_ngd_driver;
#define QCOM_SLIM_NGD_DRV_NAME "qcom,slim-ngd"
static const struct of_device_id qcom_slim_ngd_dt_match[] = {
{
.compatible = "qcom,slim-ngd-v1.5.0",
.data = &ngd_v1_5_offset_info,
},{
.compatible = "qcom,slim-ngd-v2.1.0",
.data = &ngd_v1_5_offset_info,
},
{}
};
MODULE_DEVICE_TABLE(of, qcom_slim_ngd_dt_match);
static void qcom_slim_ngd_down(struct qcom_slim_ngd_ctrl *ctrl)
{
mutex_lock(&ctrl->ssr_lock);
device_for_each_child(ctrl->ctrl.dev, NULL,
qcom_slim_ngd_update_device_status);
qcom_slim_ngd_enable(ctrl, false);
mutex_unlock(&ctrl->ssr_lock);
}
static void qcom_slim_ngd_up_worker(struct work_struct *work)
{
struct qcom_slim_ngd_ctrl *ctrl;
ctrl = container_of(work, struct qcom_slim_ngd_ctrl, ngd_up_work);
if (!wait_for_completion_interruptible_timeout(&ctrl->qmi_up,
msecs_to_jiffies(MSEC_PER_SEC))) {
dev_err(ctrl->dev, "QMI wait timeout\n");
return;
}
mutex_lock(&ctrl->ssr_lock);
qcom_slim_ngd_enable(ctrl, true);
mutex_unlock(&ctrl->ssr_lock);
}
static int qcom_slim_ngd_ssr_pdr_notify(struct qcom_slim_ngd_ctrl *ctrl,
unsigned long action)
{
switch (action) {
case QCOM_SSR_BEFORE_SHUTDOWN:
case SERVREG_SERVICE_STATE_DOWN:
mutex_lock(&ctrl->tx_lock);
if (ctrl->state != QCOM_SLIM_NGD_CTRL_DOWN) {
pm_runtime_get_noresume(ctrl->ctrl.dev);
ctrl->state = QCOM_SLIM_NGD_CTRL_DOWN;
qcom_slim_ngd_down(ctrl);
qcom_slim_ngd_exit_dma(ctrl);
}
mutex_unlock(&ctrl->tx_lock);
break;
case QCOM_SSR_AFTER_POWERUP:
case SERVREG_SERVICE_STATE_UP:
schedule_work(&ctrl->ngd_up_work);
break;
default:
break;
}
return NOTIFY_OK;
}
static int qcom_slim_ngd_ssr_notify(struct notifier_block *nb,
unsigned long action,
void *data)
{
struct qcom_slim_ngd_ctrl *ctrl = container_of(nb,
struct qcom_slim_ngd_ctrl, nb);
return qcom_slim_ngd_ssr_pdr_notify(ctrl, action);
}
static void slim_pd_status(int state, char *svc_path, void *priv)
{
struct qcom_slim_ngd_ctrl *ctrl = (struct qcom_slim_ngd_ctrl *)priv;
qcom_slim_ngd_ssr_pdr_notify(ctrl, state);
}
static int of_qcom_slim_ngd_register(struct device *parent,
struct qcom_slim_ngd_ctrl *ctrl)
{
const struct ngd_reg_offset_data *data;
struct qcom_slim_ngd *ngd;
const struct of_device_id *match;
u32 id;
int ret;
match = of_match_node(qcom_slim_ngd_dt_match, parent->of_node);
data = match->data;
for_each_available_child_of_node_scoped(parent->of_node, node) {
if (of_property_read_u32(node, "reg", &id))
continue;
ngd = kzalloc_obj(*ngd);
if (!ngd)
return -ENOMEM;
ngd->pdev = platform_device_alloc(QCOM_SLIM_NGD_DRV_NAME, id);
if (!ngd->pdev) {
kfree(ngd);
return -ENOMEM;
}
ngd->id = id;
ngd->pdev->dev.parent = parent;
ret = device_set_driver_override(&ngd->pdev->dev,
QCOM_SLIM_NGD_DRV_NAME);
if (ret) {
platform_device_put(ngd->pdev);
kfree(ngd);
return ret;
}
ngd->pdev->dev.of_node = node;
ctrl->ngd = ngd;
ret = platform_device_add(ngd->pdev);
if (ret) {
platform_device_put(ngd->pdev);
kfree(ngd);
return ret;
}
ngd->base = ctrl->base + ngd->id * data->offset +
(ngd->id - 1) * data->size;
return 0;
}
return -ENODEV;
}
static int qcom_slim_ngd_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev->parent);
int ret;
ctrl->ctrl.dev = dev;
platform_set_drvdata(pdev, ctrl);
pm_runtime_use_autosuspend(dev);
pm_runtime_set_autosuspend_delay(dev, 100);
pm_runtime_set_suspended(dev);
pm_runtime_enable(dev);
pm_runtime_get_noresume(dev);
ret = qcom_slim_ngd_qmi_svc_event_init(ctrl);
if (ret) {
dev_err(&pdev->dev, "QMI service registration failed:%d", ret);
return ret;
}
INIT_WORK(&ctrl->m_work, qcom_slim_ngd_master_worker);
INIT_WORK(&ctrl->ngd_up_work, qcom_slim_ngd_up_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;
}
return 0;
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_ctrl_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct qcom_slim_ngd_ctrl *ctrl;
int ret;
struct pdr_service *pds;
ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
if (!ctrl)
return -ENOMEM;
dev_set_drvdata(dev, ctrl);
ctrl->base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
if (IS_ERR(ctrl->base))
return PTR_ERR(ctrl->base);
ret = platform_get_irq(pdev, 0);
if (ret < 0)
return ret;
ret = devm_request_irq(dev, ret, qcom_slim_ngd_interrupt,
IRQF_TRIGGER_HIGH, "slim-ngd", ctrl);
if (ret)
return dev_err_probe(&pdev->dev, ret, "request IRQ failed\n");
ctrl->nb.notifier_call = qcom_slim_ngd_ssr_notify;
ctrl->notifier = qcom_register_ssr_notifier("lpass", &ctrl->nb);
if (IS_ERR(ctrl->notifier))
return PTR_ERR(ctrl->notifier);
ctrl->dev = dev;
ctrl->framer.rootfreq = SLIM_ROOT_FREQ >> 3;
ctrl->framer.superfreq =
ctrl->framer.rootfreq / SLIM_CL_PER_SUPERFRAME_DIV8;
ctrl->ctrl.a_framer = &ctrl->framer;
ctrl->ctrl.clkgear = SLIM_MAX_CLK_GEAR;
ctrl->ctrl.get_laddr = qcom_slim_ngd_get_laddr;
ctrl->ctrl.enable_stream = qcom_slim_ngd_enable_stream;
ctrl->ctrl.xfer_msg = qcom_slim_ngd_xfer_msg;
ctrl->ctrl.wakeup = NULL;
ctrl->state = QCOM_SLIM_NGD_CTRL_DOWN;
mutex_init(&ctrl->tx_lock);
mutex_init(&ctrl->ssr_lock);
spin_lock_init(&ctrl->tx_buf_lock);
init_completion(&ctrl->reconf);
init_completion(&ctrl->qmi.qmi_comp);
init_completion(&ctrl->qmi_up);
ctrl->pdr = pdr_handle_alloc(slim_pd_status, ctrl);
if (IS_ERR(ctrl->pdr)) {
ret = dev_err_probe(dev, PTR_ERR(ctrl->pdr),
"Failed to init PDR handle\n");
goto err_pdr_alloc;
}
pds = pdr_add_lookup(ctrl->pdr, "avs/audio", "msm/adsp/audio_pd");
if (IS_ERR(pds) && PTR_ERR(pds) != -EALREADY) {
ret = dev_err_probe(dev, PTR_ERR(pds), "pdr add lookup failed\n");
goto err_pdr_lookup;
}
platform_driver_register(&qcom_slim_ngd_driver);
return of_qcom_slim_ngd_register(dev, ctrl);
err_pdr_alloc:
qcom_unregister_ssr_notifier(ctrl->notifier, &ctrl->nb);
err_pdr_lookup:
pdr_handle_release(ctrl->pdr);
return ret;
}
static void qcom_slim_ngd_ctrl_remove(struct platform_device *pdev)
{
platform_driver_unregister(&qcom_slim_ngd_driver);
}
static void qcom_slim_ngd_remove(struct platform_device *pdev)
{
struct qcom_slim_ngd_ctrl *ctrl = platform_get_drvdata(pdev);
pm_runtime_disable(&pdev->dev);
pdr_handle_release(ctrl->pdr);
qcom_unregister_ssr_notifier(ctrl->notifier, &ctrl->nb);
qcom_slim_ngd_enable(ctrl, false);
qcom_slim_ngd_exit_dma(ctrl);
qcom_slim_ngd_qmi_svc_event_deinit(&ctrl->qmi);
if (ctrl->mwq)
destroy_workqueue(ctrl->mwq);
kfree(ctrl->ngd);
ctrl->ngd = NULL;
}
static int __maybe_unused 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;
}
static int __maybe_unused qcom_slim_ngd_runtime_suspend(struct device *dev)
{
struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
int ret = 0;
qcom_slim_ngd_exit_dma(ctrl);
if (!ctrl->qmi.handle)
return 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;
}
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 struct platform_driver qcom_slim_ngd_ctrl_driver = {
.probe = qcom_slim_ngd_ctrl_probe,
.remove = qcom_slim_ngd_ctrl_remove,
.driver = {
.name = "qcom,slim-ngd-ctrl",
.of_match_table = 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_DRV_NAME,
.pm = &qcom_slim_ngd_dev_pm_ops,
},
};
module_platform_driver(qcom_slim_ngd_ctrl_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Qualcomm SLIMBus NGD controller");
