Input: synaptics-rmi4 - enable IRQ operation in F34 V7

The polled firmware update proved unreliable when testing on S7817. Use
attention to signal commands are complete.
Signed-off-by: Nick Dyer <nick@shmanahar.org>
Tested-by: Chris Healy <cphealy@gmail.com>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/rmi4/rmi_f34.c

@@ -105,16 +105,27 @@ static int rmi_f34_attention(struct rmi_function *fn, unsigned long *irq_bits)
 {
 	struct f34_data *f34 = dev_get_drvdata(&fn->dev);
 	int ret;
+	u8 status;
 
-	if (f34->bl_version != 5)
-		return 0;
+	if (f34->bl_version == 5) {
+		ret = rmi_read(f34->fn->rmi_dev, f34->v5.ctrl_address,
+			       &status);
+		rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: status: %#02x, ret: %d\n",
+			__func__, status, ret);
 
-	ret = rmi_read(f34->fn->rmi_dev, f34->v5.ctrl_address, &f34->v5.status);
-	rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: status: %#02x, ret: %d\n",
-		__func__, f34->v5.status, ret);
-
-	if (!ret && !(f34->v5.status & 0x7f))
-		complete(&f34->v5.cmd_done);
+		if (!ret && !(status & 0x7f))
+			complete(&f34->v5.cmd_done);
+	} else {
+		ret = rmi_read_block(f34->fn->rmi_dev,
+				     f34->fn->fd.data_base_addr +
+						f34->v7.off.flash_status,
+				     &status, sizeof(status));
+		rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: status: %#02x, ret: %d\n",
+			__func__, status, ret);
+
+		if (!ret && !(status & 0x1f))
+			complete(&f34->v7.cmd_done);
+	}
 
 	return 0;
 }

drivers/input/rmi4/rmi_f34.h

@@ -30,6 +30,7 @@
 #define F34_IDLE_WAIT_MS	500
 #define F34_ENABLE_WAIT_MS	300
 #define F34_ERASE_WAIT_MS	5000
+#define F34_WRITE_WAIT_MS	3000
 
 #define F34_BOOTLOADER_ID_LEN	2
 
@@ -47,11 +48,6 @@
 #define CONFIG_ID_SIZE			32
 #define PRODUCT_ID_SIZE			10
 
-#define ENABLE_WAIT_MS			(1 * 1000)
-#define WRITE_WAIT_MS			(3 * 1000)
-
-#define MIN_SLEEP_TIME_US		50
-#define MAX_SLEEP_TIME_US		100
 
 #define HAS_BSR				BIT(5)
 #define HAS_CONFIG_ID			BIT(3)
@@ -292,6 +288,7 @@ struct f34v7_data {
 
 	const void *config_data;
 	const void *image;
+	struct completion cmd_done;
 };
 
 struct f34_data {

drivers/input/rmi4/rmi_f34v7.c

@@ -15,6 +15,7 @@
 #include <asm/unaligned.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
+#include <linux/jiffies.h>
 
 #include "rmi_driver.h"
 #include "rmi_f34.h"
@@ -31,7 +32,7 @@ static int rmi_f34v7_read_flash_status(struct f34_data *f34)
 			sizeof(status));
 	if (ret < 0) {
 		rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
-			"%s: Failed to read flash status\n", __func__);
+			"%s: Error %d reading flash status\n", __func__, ret);
 		return ret;
 	}
 
@@ -60,28 +61,17 @@ static int rmi_f34v7_read_flash_status(struct f34_data *f34)
 
 static int rmi_f34v7_wait_for_idle(struct f34_data *f34, int timeout_ms)
 {
-	int count = 0;
-	int timeout_count = ((timeout_ms * 1000) / MAX_SLEEP_TIME_US) + 1;
+	unsigned long timeout;
 
-	do {
-		usleep_range(MIN_SLEEP_TIME_US, MAX_SLEEP_TIME_US);
-
-		count++;
-
-		rmi_f34v7_read_flash_status(f34);
-
-		if ((f34->v7.command == v7_CMD_IDLE)
-		    && (f34->v7.flash_status == 0x00)) {
-			rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
-				"Idle status detected\n");
-			return 0;
-		}
-	} while (count < timeout_count);
+	timeout = msecs_to_jiffies(timeout_ms);
 
-	dev_err(&f34->fn->dev,
-		"%s: Timed out waiting for idle status\n", __func__);
+	if (!wait_for_completion_timeout(&f34->v7.cmd_done, timeout)) {
+		dev_warn(&f34->fn->dev, "%s: Timed out waiting for idle status\n",
+			 __func__);
+		return -ETIMEDOUT;
+	}
 
-	return -ETIMEDOUT;
+	return 0;
 }
 
 static int rmi_f34v7_write_command_single_transaction(struct f34_data *f34,
@@ -285,9 +275,10 @@ static int rmi_f34v7_write_partition_id(struct f34_data *f34, u8 cmd)
 	return 0;
 }
 
-static int rmi_f34v7_read_f34v7_partition_table(struct f34_data *f34)
+static int rmi_f34v7_read_partition_table(struct f34_data *f34)
 {
 	int ret;
+	unsigned long timeout;
 	u8 base;
 	__le16 length;
 	u16 block_number = 0;
@@ -320,6 +311,8 @@ static int rmi_f34v7_read_f34v7_partition_table(struct f34_data *f34)
 		return ret;
 	}
 
+	init_completion(&f34->v7.cmd_done);
+
 	ret = rmi_f34v7_write_command(f34, v7_CMD_READ_CONFIG);
 	if (ret < 0) {
 		dev_err(&f34->fn->dev, "%s: Failed to write command\n",
@@ -327,11 +320,15 @@ static int rmi_f34v7_read_f34v7_partition_table(struct f34_data *f34)
 		return ret;
 	}
 
-	ret = rmi_f34v7_wait_for_idle(f34, WRITE_WAIT_MS);
-	if (ret < 0) {
-		dev_err(&f34->fn->dev, "%s: Failed to wait for idle status\n",
-			__func__);
-		return ret;
+	timeout = msecs_to_jiffies(F34_WRITE_WAIT_MS);
+	while (time_before(jiffies, timeout)) {
+		usleep_range(5000, 6000);
+		rmi_f34v7_read_flash_status(f34);
+
+		if (f34->v7.command == v7_CMD_IDLE &&
+		    f34->v7.flash_status == 0x00) {
+			break;
+		}
 	}
 
 	ret = rmi_read_block(f34->fn->rmi_dev,
@@ -570,7 +567,7 @@ static int rmi_f34v7_read_queries(struct f34_data *f34)
 	f34->v7.read_config_buf_size = f34->v7.partition_table_bytes;
 	ptable = f34->v7.read_config_buf;
 
-	ret = rmi_f34v7_read_f34v7_partition_table(f34);
+	ret = rmi_f34v7_read_partition_table(f34);
 	if (ret < 0) {
 		dev_err(&f34->fn->dev, "%s: Failed to read partition table\n",
 				__func__);
@@ -666,6 +663,8 @@ static int rmi_f34v7_erase_config(struct f34_data *f34)
 
 	dev_info(&f34->fn->dev, "Erasing config...\n");
 
+	init_completion(&f34->v7.cmd_done);
+
 	switch (f34->v7.config_area) {
 	case v7_UI_CONFIG_AREA:
 		ret = rmi_f34v7_write_command(f34, v7_CMD_ERASE_UI_CONFIG);
@@ -684,11 +683,11 @@ static int rmi_f34v7_erase_config(struct f34_data *f34)
 		break;
 	}
 
-	ret = rmi_f34v7_wait_for_idle(f34, ENABLE_WAIT_MS);
+	ret = rmi_f34v7_wait_for_idle(f34, F34_ERASE_WAIT_MS);
 	if (ret < 0)
 		return ret;
 
-	return ret;
+	return 0;
 }
 
 static int rmi_f34v7_erase_guest_code(struct f34_data *f34)
@@ -697,11 +696,13 @@ static int rmi_f34v7_erase_guest_code(struct f34_data *f34)
 
 	dev_info(&f34->fn->dev, "Erasing guest code...\n");
 
+	init_completion(&f34->v7.cmd_done);
+
 	ret = rmi_f34v7_write_command(f34, v7_CMD_ERASE_GUEST_CODE);
 	if (ret < 0)
 		return ret;
 
-	ret = rmi_f34v7_wait_for_idle(f34, ENABLE_WAIT_MS);
+	ret = rmi_f34v7_wait_for_idle(f34, F34_ERASE_WAIT_MS);
 	if (ret < 0)
 		return ret;
 
@@ -714,11 +715,13 @@ static int rmi_f34v7_erase_all(struct f34_data *f34)
 
 	dev_info(&f34->fn->dev, "Erasing firmware...\n");
 
+	init_completion(&f34->v7.cmd_done);
+
 	ret = rmi_f34v7_write_command(f34, v7_CMD_ERASE_UI_FIRMWARE);
 	if (ret < 0)
 		return ret;
 
-	ret = rmi_f34v7_wait_for_idle(f34, ENABLE_WAIT_MS);
+	ret = rmi_f34v7_wait_for_idle(f34, F34_ERASE_WAIT_MS);
 	if (ret < 0)
 		return ret;
 
@@ -743,8 +746,8 @@ static int rmi_f34v7_erase_all(struct f34_data *f34)
 	return 0;
 }
 
-static int rmi_f34v7_read_f34v7_blocks(struct f34_data *f34, u16 block_cnt,
-				       u8 command)
+static int rmi_f34v7_read_blocks(struct f34_data *f34,
+				 u16 block_cnt, u8 command)
 {
 	int ret;
 	u8 base;
@@ -787,17 +790,15 @@ static int rmi_f34v7_read_f34v7_blocks(struct f34_data *f34, u16 block_cnt,
 			return ret;
 		}
 
+		init_completion(&f34->v7.cmd_done);
+
 		ret = rmi_f34v7_write_command(f34, command);
 		if (ret < 0)
 			return ret;
 
-		ret = rmi_f34v7_wait_for_idle(f34, ENABLE_WAIT_MS);
-		if (ret < 0) {
-			dev_err(&f34->fn->dev,
-				"%s: Wait for idle failed (%d blks remaining)\n",
-				__func__, remaining);
+		ret = rmi_f34v7_wait_for_idle(f34, F34_ENABLE_WAIT_MS);
+		if (ret < 0)
 			return ret;
-		}
 
 		ret = rmi_read_block(f34->fn->rmi_dev,
 				base + f34->v7.off.payload,
@@ -853,6 +854,8 @@ static int rmi_f34v7_write_f34v7_blocks(struct f34_data *f34,
 		transfer = min(remaining, max_transfer);
 		put_unaligned_le16(transfer, &length);
 
+		init_completion(&f34->v7.cmd_done);
+
 		ret = rmi_write_block(f34->fn->rmi_dev,
 				base + f34->v7.off.transfer_length,
 				&length, sizeof(length));
@@ -877,13 +880,9 @@ static int rmi_f34v7_write_f34v7_blocks(struct f34_data *f34,
 			return ret;
 		}
 
-		ret = rmi_f34v7_wait_for_idle(f34, ENABLE_WAIT_MS);
-		if (ret < 0) {
-			dev_err(&f34->fn->dev,
-				"%s: Failed wait for idle (%d blks remaining)\n",
-				__func__, remaining);
+		ret = rmi_f34v7_wait_for_idle(f34, F34_ENABLE_WAIT_MS);
+		if (ret < 0)
 			return ret;
-		}
 
 		block_ptr += (transfer * f34->v7.block_size);
 		remaining -= transfer;
@@ -945,6 +944,8 @@ static int rmi_f34v7_write_flash_config(struct f34_data *f34)
 		return -EINVAL;
 	}
 
+	init_completion(&f34->v7.cmd_done);
+
 	ret = rmi_f34v7_write_command(f34, v7_CMD_ERASE_FLASH_CONFIG);
 	if (ret < 0)
 		return ret;
@@ -952,7 +953,7 @@ static int rmi_f34v7_write_flash_config(struct f34_data *f34)
 	rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
 		"%s: Erase flash config command written\n", __func__);
 
-	ret = rmi_f34v7_wait_for_idle(f34, ENABLE_WAIT_MS);
+	ret = rmi_f34v7_wait_for_idle(f34, F34_WRITE_WAIT_MS);
 	if (ret < 0)
 		return ret;
 
@@ -981,7 +982,7 @@ static int rmi_f34v7_write_partition_table(struct f34_data *f34)
 
 	f34->v7.read_config_buf_size = f34->v7.config_size;
 
-	ret = rmi_f34v7_read_f34v7_blocks(f34, block_count, v7_CMD_READ_CONFIG);
+	ret = rmi_f34v7_read_blocks(f34, block_count, v7_CMD_READ_CONFIG);
 	if (ret < 0)
 		return ret;
 
@@ -1287,6 +1288,8 @@ static int rmi_f34v7_enter_flash_prog(struct f34_data *f34)
 {
 	int ret;
 
+	f34->fn->rmi_dev->driver->set_irq_bits(f34->fn->rmi_dev, f34->fn->irq_mask);
+
 	ret = rmi_f34v7_read_flash_status(f34);
 	if (ret < 0)
 		return ret;
@@ -1294,19 +1297,16 @@ static int rmi_f34v7_enter_flash_prog(struct f34_data *f34)
 	if (f34->v7.in_bl_mode)
 		return 0;
 
+	init_completion(&f34->v7.cmd_done);
+
 	ret = rmi_f34v7_write_command(f34, v7_CMD_ENABLE_FLASH_PROG);
 	if (ret < 0)
 		return ret;
 
-	ret = rmi_f34v7_wait_for_idle(f34, ENABLE_WAIT_MS);
+	ret = rmi_f34v7_wait_for_idle(f34, F34_ENABLE_WAIT_MS);
 	if (ret < 0)
 		return ret;
 
-	if (!f34->v7.in_bl_mode) {
-		dev_err(&f34->fn->dev, "%s: BL mode not entered\n", __func__);
-		return -EINVAL;
-	}
-
 	return 0;
 }
 
@@ -1314,6 +1314,8 @@ int rmi_f34v7_start_reflash(struct f34_data *f34, const struct firmware *fw)
 {
 	int ret = 0;
 
+	f34->fn->rmi_dev->driver->set_irq_bits(f34->fn->rmi_dev, f34->fn->irq_mask);
+
 	f34->v7.config_area = v7_UI_CONFIG_AREA;
 	f34->v7.image = fw->data;
 
@@ -1376,8 +1378,13 @@ int rmi_f34v7_probe(struct f34_data *f34)
 
 	memset(&f34->v7.blkcount, 0x00, sizeof(f34->v7.blkcount));
 	memset(&f34->v7.phyaddr, 0x00, sizeof(f34->v7.phyaddr));
-	rmi_f34v7_read_queries(f34);
 
-	f34->v7.force_update = false;
+	init_completion(&f34->v7.cmd_done);
+
+	ret = rmi_f34v7_read_queries(f34);
+	if (ret < 0)
+		return ret;
+
+	f34->v7.force_update = true;
 	return 0;
 }