Replacing the old "cmd" and "sync" callbacks with an
implementation of struct ucsi_operations. The interrupt
handler will from now on read the CCI (Command Status and
Connector Change Indication) register, and call
ucsi_connector_change() function and/or complete pending
command completions based on it.
Signed-off-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Tested-by: Ajay Gupta <ajayg@xxxxxxxxxx>
---
drivers/usb/typec/ucsi/ucsi_ccg.c | 166 +++++++++++++++---------------
1 file changed, 81 insertions(+), 85 deletions(-)
diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
index d772fce51905..3370b3fc37b1 100644
--- a/drivers/usb/typec/ucsi/ucsi_ccg.c
+++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
@@ -176,8 +176,8 @@ struct ccg_resp {
struct ucsi_ccg {
struct device *dev;
struct ucsi *ucsi;
- struct ucsi_ppm ppm;
struct i2c_client *client;
+
struct ccg_dev_info info;
/* version info for boot, primary and secondary */
struct version_info version[FW2 + 1];
@@ -196,6 +196,8 @@ struct ucsi_ccg {
/* fw build with vendor information */
u16 fw_build;
struct work_struct pm_work;
+
+ struct completion complete;
};
static int ccg_read(struct ucsi_ccg *uc, u16 rab, u8 *data, u32 len)
@@ -243,7 +245,7 @@ static int ccg_read(struct ucsi_ccg *uc, u16 rab, u8 *data, u32 len)
return 0;
}
-static int ccg_write(struct ucsi_ccg *uc, u16 rab, u8 *data, u32 len)
+static int ccg_write(struct ucsi_ccg *uc, u16 rab, const u8 *data, u32 len)
{
struct i2c_client *client = uc->client;
unsigned char *buf;
@@ -317,88 +319,85 @@ static int ucsi_ccg_init(struct ucsi_ccg *uc)
return -ETIMEDOUT;
}
-static int ucsi_ccg_send_data(struct ucsi_ccg *uc)
+static int ucsi_ccg_read(struct ucsi *ucsi, unsigned int offset,
+ void *val, size_t val_len)
{
- u8 *ppm = (u8 *)uc->ppm.data;
- int status;
- u16 rab;
+ u16 reg = CCGX_RAB_UCSI_DATA_BLOCK(offset);
- rab = CCGX_RAB_UCSI_DATA_BLOCK(offsetof(struct ucsi_data, message_out));
- status = ccg_write(uc, rab, ppm +
- offsetof(struct ucsi_data, message_out),
- sizeof(uc->ppm.data->message_out));
- if (status < 0)
- return status;
-
- rab = CCGX_RAB_UCSI_DATA_BLOCK(offsetof(struct ucsi_data, ctrl));
- return ccg_write(uc, rab, ppm + offsetof(struct ucsi_data, ctrl),
- sizeof(uc->ppm.data->ctrl));
+ return ccg_read(ucsi_get_drvdata(ucsi), reg, val, val_len);
}
-static int ucsi_ccg_recv_data(struct ucsi_ccg *uc)
+static int ucsi_ccg_async_write(struct ucsi *ucsi, unsigned int offset,
+ const void *val, size_t val_len)
{
- u8 *ppm = (u8 *)uc->ppm.data;
- int status;
- u16 rab;
+ u16 reg = CCGX_RAB_UCSI_DATA_BLOCK(offset);
- rab = CCGX_RAB_UCSI_DATA_BLOCK(offsetof(struct ucsi_data, cci));
- status = ccg_read(uc, rab, ppm + offsetof(struct ucsi_data, cci),
- sizeof(uc->ppm.data->cci));
- if (status < 0)
- return status;
-
- rab = CCGX_RAB_UCSI_DATA_BLOCK(offsetof(struct ucsi_data, message_in));
- return ccg_read(uc, rab, ppm + offsetof(struct ucsi_data, message_in),
- sizeof(uc->ppm.data->message_in));
+ return ccg_write(ucsi_get_drvdata(ucsi), reg, val, val_len);
}
-static int ucsi_ccg_ack_interrupt(struct ucsi_ccg *uc)
+static int ucsi_ccg_sync_write(struct ucsi *ucsi, unsigned int offset,
+ const void *val, size_t val_len)
{
- int status;
- unsigned char data;
+ struct ucsi_ccg *uc = ucsi_get_drvdata(ucsi);
+ int ret;
- status = ccg_read(uc, CCGX_RAB_INTR_REG, &data, sizeof(data));
- if (status < 0)
- return status;
+ mutex_lock(&uc->lock);
+ pm_runtime_get_sync(uc->dev);
+ set_bit(DEV_CMD_PENDING, &uc->flags);
- return ccg_write(uc, CCGX_RAB_INTR_REG, &data, sizeof(data));
-}
+ ret = ucsi_ccg_async_write(ucsi, offset, val, val_len);
+ if (ret)
+ goto err_clear_bit;
-static int ucsi_ccg_sync(struct ucsi_ppm *ppm)
-{
- struct ucsi_ccg *uc = container_of(ppm, struct ucsi_ccg, ppm);
- int status;
+ if (!wait_for_completion_timeout(&uc->complete, msecs_to_jiffies(5000)))
+ ret = -ETIMEDOUT;
- status = ucsi_ccg_recv_data(uc);
- if (status < 0)
- return status;
+err_clear_bit:
+ clear_bit(DEV_CMD_PENDING, &uc->flags);
+ pm_runtime_put_sync(uc->dev);
+ mutex_unlock(&uc->lock);
- /* ack interrupt to allow next command to run */
- return ucsi_ccg_ack_interrupt(uc);
+ return ret;
}
-static int ucsi_ccg_cmd(struct ucsi_ppm *ppm, struct ucsi_control *ctrl)
-{
- struct ucsi_ccg *uc = container_of(ppm, struct ucsi_ccg, ppm);
-
- ppm->data->ctrl.raw_cmd = ctrl->raw_cmd;
- return ucsi_ccg_send_data(uc);
-}
+static const struct ucsi_operations ucsi_ccg_ops = {
+ .read = ucsi_ccg_read,
+ .sync_write = ucsi_ccg_sync_write,
+ .async_write = ucsi_ccg_async_write
+};
static irqreturn_t ccg_irq_handler(int irq, void *data)
{
+ u16 reg = CCGX_RAB_UCSI_DATA_BLOCK(UCSI_CCI);
struct ucsi_ccg *uc = data;
+ u8 intr_reg;
+ u32 cci;
+ int ret;
+
+ ret = ccg_read(uc, CCGX_RAB_INTR_REG, &intr_reg, sizeof(intr_reg));
+ if (ret)
+ return ret;
+
+ ret = ccg_read(uc, reg, (void *)&cci, sizeof(cci));
+ if (ret)
+ goto err_clear_irq;
+
+ if (UCSI_CCI_CONNECTOR(cci))
+ ucsi_connector_change(uc->ucsi, UCSI_CCI_CONNECTOR(cci));
+
+ if (test_bit(DEV_CMD_PENDING, &uc->flags) &&
+ cci & (UCSI_CCI_ACK_COMPLETE | UCSI_CCI_COMMAND_COMPLETE))
+ complete(&uc->complete);
- ucsi_notify(uc->ucsi);
+err_clear_irq:
+ ccg_write(uc, CCGX_RAB_INTR_REG, &intr_reg, sizeof(intr_reg));
return IRQ_HANDLED;
}
static void ccg_pm_workaround_work(struct work_struct *pm_work)
{
- struct ucsi_ccg *uc = container_of(pm_work, struct ucsi_ccg, pm_work);
-
- ucsi_notify(uc->ucsi);
+ ccg_irq_handler(0, container_of(pm_work, struct ucsi_ccg, pm_work));
}
static int get_fw_info(struct ucsi_ccg *uc)
@@ -1027,10 +1026,10 @@ static int ccg_restart(struct ucsi_ccg *uc)
return status;
}
- uc->ucsi = ucsi_register_ppm(dev, &uc->ppm);
- if (IS_ERR(uc->ucsi)) {
- dev_err(uc->dev, "ucsi_register_ppm failed\n");
- return PTR_ERR(uc->ucsi);
+ status = ucsi_register(uc->ucsi);
+ if (status) {
+ dev_err(uc->dev, "failed to register the interface\n");
+ return status;
}
return 0;
@@ -1047,7 +1046,7 @@ static void ccg_update_firmware(struct work_struct *work)
return;
if (flash_mode != FLASH_NOT_NEEDED) {
- ucsi_unregister_ppm(uc->ucsi);
+ ucsi_unregister(uc->ucsi);
free_irq(uc->irq, uc);
ccg_fw_update(uc, flash_mode);
@@ -1091,21 +1090,15 @@ static int ucsi_ccg_probe(struct i2c_client *client,
struct device *dev = &client->dev;
struct ucsi_ccg *uc;
int status;
- u16 rab;
uc = devm_kzalloc(dev, sizeof(*uc), GFP_KERNEL);
if (!uc)
return -ENOMEM;
- uc->ppm.data = devm_kzalloc(dev, sizeof(struct ucsi_data), GFP_KERNEL);
- if (!uc->ppm.data)
- return -ENOMEM;
-
- uc->ppm.cmd = ucsi_ccg_cmd;
- uc->ppm.sync = ucsi_ccg_sync;
uc->dev = dev;
uc->client = client;
mutex_init(&uc->lock);
+ init_completion(&uc->complete);
INIT_WORK(&uc->work, ccg_update_firmware);
INIT_WORK(&uc->pm_work, ccg_pm_workaround_work);
@@ -1133,30 +1126,25 @@ static int ucsi_ccg_probe(struct i2c_client *client,
if (uc->info.mode & CCG_DEVINFO_PDPORTS_MASK)
uc->port_num++;
+ uc->ucsi = ucsi_create(dev, &ucsi_ccg_ops);
+ if (IS_ERR(uc->ucsi))
+ return PTR_ERR(uc->ucsi);
+
+ ucsi_set_drvdata(uc->ucsi, uc);
+
status = request_threaded_irq(client->irq, NULL, ccg_irq_handler,
IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
dev_name(dev), uc);
if (status < 0) {
dev_err(uc->dev, "request_threaded_irq failed - %d\n", status);
- return status;
+ goto out_ucsi_destroy;
}
uc->irq = client->irq;
- uc->ucsi = ucsi_register_ppm(dev, &uc->ppm);
- if (IS_ERR(uc->ucsi)) {
- dev_err(uc->dev, "ucsi_register_ppm failed\n");
- return PTR_ERR(uc->ucsi);
- }
-
- rab = CCGX_RAB_UCSI_DATA_BLOCK(offsetof(struct ucsi_data, version));
- status = ccg_read(uc, rab, (u8 *)(uc->ppm.data) +
- offsetof(struct ucsi_data, version),
- sizeof(uc->ppm.data->version));
- if (status < 0) {
- ucsi_unregister_ppm(uc->ucsi);
- return status;
- }
+ status = ucsi_register(uc->ucsi);
+ if (status)
+ goto out_free_irq;
i2c_set_clientdata(client, uc);
@@ -1167,6 +1155,13 @@ static int ucsi_ccg_probe(struct i2c_client *client,
pm_runtime_idle(uc->dev);
return 0;
+
+out_free_irq:
+ free_irq(uc->irq, uc);
+out_ucsi_destroy:
+ ucsi_destroy(uc->ucsi);
+
+ return status;
}
static int ucsi_ccg_remove(struct i2c_client *client)
@@ -1175,8 +1170,9 @@ static int ucsi_ccg_remove(struct i2c_client *client)
cancel_work_sync(&uc->pm_work);
cancel_work_sync(&uc->work);
- ucsi_unregister_ppm(uc->ucsi);
pm_runtime_disable(uc->dev);
+ ucsi_unregister(uc->ucsi);
+ ucsi_destroy(uc->ucsi);
free_irq(uc->irq, uc);
return 0;
--
2.24.0.rc1
