usb: typec: ucsi: ccg: add get_fw_info function

Function is to get the details of ccg firmware and device version.
It will be useful in debugging and also during firmware update.

Signed-off-by: Ajay Gupta <[email protected]>
Signed-off-by: Heikki Krogerus <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Ajay Gupta

drivers/usb/typec/ucsi/ucsi_ccg.c

@@ -17,15 +17,54 @@
 #include <asm/unaligned.h>
 #include "ucsi.h"
 
+enum enum_fw_mode {
+	BOOT,   /* bootloader */
+	FW1,    /* FW partition-1 (contains secondary fw) */
+	FW2,    /* FW partition-2 (contains primary fw) */
+	FW_INVALID,
+};
+
+struct ccg_dev_info {
+#define CCG_DEVINFO_FWMODE_SHIFT (0)
+#define CCG_DEVINFO_FWMODE_MASK (0x3 << CCG_DEVINFO_FWMODE_SHIFT)
+#define CCG_DEVINFO_PDPORTS_SHIFT (2)
+#define CCG_DEVINFO_PDPORTS_MASK (0x3 << CCG_DEVINFO_PDPORTS_SHIFT)
+	u8 mode;
+	u8 bl_mode;
+	__le16 silicon_id;
+	__le16 bl_last_row;
+} __packed;
+
+struct version_format {
+	__le16 build;
+	u8 patch;
+	u8 ver;
+#define CCG_VERSION_MIN_SHIFT (0)
+#define CCG_VERSION_MIN_MASK (0xf << CCG_VERSION_MIN_SHIFT)
+#define CCG_VERSION_MAJ_SHIFT (4)
+#define CCG_VERSION_MAJ_MASK (0xf << CCG_VERSION_MAJ_SHIFT)
+} __packed;
+
+struct version_info {
+	struct version_format base;
+	struct version_format app;
+};
+
 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];
 };
 
-#define CCGX_RAB_INTR_REG			0x06
-#define CCGX_RAB_UCSI_CONTROL			0x39
+#define CCGX_RAB_DEVICE_MODE			0x0000
+#define CCGX_RAB_INTR_REG			0x0006
+#define CCGX_RAB_READ_ALL_VER			0x0010
+#define CCGX_RAB_READ_FW2_VER			0x0020
+#define CCGX_RAB_UCSI_CONTROL			0x0039
 #define CCGX_RAB_UCSI_CONTROL_START		BIT(0)
 #define CCGX_RAB_UCSI_CONTROL_STOP		BIT(1)
 #define CCGX_RAB_UCSI_DATA_BLOCK(offset)	(0xf000 | ((offset) & 0xff))
@@ -220,6 +259,23 @@ static irqreturn_t ccg_irq_handler(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
+static int get_fw_info(struct ucsi_ccg *uc)
+{
+	int err;
+
+	err = ccg_read(uc, CCGX_RAB_READ_ALL_VER, (u8 *)(&uc->version),
+		       sizeof(uc->version));
+	if (err < 0)
+		return err;
+
+	err = ccg_read(uc, CCGX_RAB_DEVICE_MODE, (u8 *)(&uc->info),
+		       sizeof(uc->info));
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
 static int ucsi_ccg_probe(struct i2c_client *client,
 			  const struct i2c_device_id *id)
 {
@@ -248,6 +304,12 @@ static int ucsi_ccg_probe(struct i2c_client *client,
 		return status;
 	}
 
+	status = get_fw_info(uc);
+	if (status < 0) {
+		dev_err(uc->dev, "get_fw_info failed - %d\n", status);
+		return status;
+	}
+
 	status = devm_request_threaded_irq(dev, client->irq, NULL,
 					   ccg_irq_handler,
 					   IRQF_ONESHOT | IRQF_TRIGGER_HIGH,