Input: synaptics-rmi4 - add support for F34 V7 bootloader

Port firmware update code from Samsung Galaxy S7 driver into
mainline framework.

This patch has been tested on Synaptics S7813.

Signed-off-by: Nick Dyer <nick@shmanahar.org>
Tested-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/rmi4/Makefile

@@ -8,7 +8,7 @@ rmi_core-$(CONFIG_RMI4_F03) += rmi_f03.o
 rmi_core-$(CONFIG_RMI4_F11) += rmi_f11.o
 rmi_core-$(CONFIG_RMI4_F12) += rmi_f12.o
 rmi_core-$(CONFIG_RMI4_F30) += rmi_f30.o
-rmi_core-$(CONFIG_RMI4_F34) += rmi_f34.o
+rmi_core-$(CONFIG_RMI4_F34) += rmi_f34.o rmi_f34v7.o
 rmi_core-$(CONFIG_RMI4_F54) += rmi_f54.o
 rmi_core-$(CONFIG_RMI4_F55) += rmi_f55.o
 

drivers/input/rmi4/rmi_driver.c

@@ -544,7 +544,7 @@ static int rmi_scan_pdt_page(struct rmi_device *rmi_dev,
 	else
 		*empty_pages = 0;
 
-	return (data->f01_bootloader_mode || *empty_pages >= 2) ?
+	return (data->bootloader_mode || *empty_pages >= 2) ?
 					RMI_SCAN_DONE : RMI_SCAN_CONTINUE;
 }
 
@@ -749,41 +749,49 @@ bool rmi_register_desc_has_subpacket(const struct rmi_register_desc_item *item,
 				subpacket) == subpacket;
 }
 
-/* Indicates that flash programming is enabled (bootloader mode). */
-#define RMI_F01_STATUS_BOOTLOADER(status)	(!!((status) & 0x40))
-
-/*
- * Given the PDT entry for F01, read the device status register to determine
- * if we're stuck in bootloader mode or not.
- *
- */
 static int rmi_check_bootloader_mode(struct rmi_device *rmi_dev,
 				     const struct pdt_entry *pdt)
 {
-	int error;
-	u8 device_status;
+	struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
+	int ret;
+	u8 status;
 
-	error = rmi_read(rmi_dev, pdt->data_base_addr + pdt->page_start,
-			 &device_status);
-	if (error) {
-		dev_err(&rmi_dev->dev,
-			"Failed to read device status: %d.\n", error);
-		return error;
+	if (pdt->function_number == 0x34 && pdt->function_version > 1) {
+		ret = rmi_read(rmi_dev, pdt->data_base_addr, &status);
+		if (ret) {
+			dev_err(&rmi_dev->dev,
+				"Failed to read F34 status: %d.\n", ret);
+			return ret;
+		}
+
+		if (status & BIT(7))
+			data->bootloader_mode = true;
+	} else if (pdt->function_number == 0x01) {
+		ret = rmi_read(rmi_dev, pdt->data_base_addr, &status);
+		if (ret) {
+			dev_err(&rmi_dev->dev,
+				"Failed to read F01 status: %d.\n", ret);
+			return ret;
+		}
+
+		if (status & BIT(6))
+			data->bootloader_mode = true;
 	}
 
-	return RMI_F01_STATUS_BOOTLOADER(device_status);
+	return 0;
 }
 
 static int rmi_count_irqs(struct rmi_device *rmi_dev,
 			 void *ctx, const struct pdt_entry *pdt)
 {
-	struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
 	int *irq_count = ctx;
+	int ret;
 
 	*irq_count += pdt->interrupt_source_count;
-	if (pdt->function_number == 0x01)
-		data->f01_bootloader_mode =
-			rmi_check_bootloader_mode(rmi_dev, pdt);
+
+	ret = rmi_check_bootloader_mode(rmi_dev, pdt);
+	if (ret < 0)
+		return ret;
 
 	return RMI_SCAN_CONTINUE;
 }
@@ -1024,13 +1032,15 @@ int rmi_probe_interrupts(struct rmi_driver_data *data)
 	 */
 	rmi_dbg(RMI_DEBUG_CORE, dev, "%s: Counting IRQs.\n", __func__);
 	irq_count = 0;
+	data->bootloader_mode = false;
+
 	retval = rmi_scan_pdt(rmi_dev, &irq_count, rmi_count_irqs);
 	if (retval < 0) {
 		dev_err(dev, "IRQ counting failed with code %d.\n", retval);
 		return retval;
 	}
 
-	if (data->f01_bootloader_mode)
+	if (data->bootloader_mode)
 		dev_warn(&rmi_dev->dev, "Device in bootloader mode.\n");
 
 	data->irq_count = irq_count;

drivers/input/rmi4/rmi_f34.c

@@ -12,6 +12,7 @@
 #include <linux/firmware.h>
 #include <asm/unaligned.h>
 #include <asm/unaligned.h>
+#include <linux/bitops.h>
 
 #include "rmi_driver.h"
 #include "rmi_f34.h"
@@ -105,6 +106,9 @@ static int rmi_f34_attention(struct rmi_function *fn, unsigned long *irq_bits)
 	struct f34_data *f34 = dev_get_drvdata(&fn->dev);
 	int ret;
 
+	if (f34->bl_version != 5)
+		return 0;
+
 	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);
@@ -292,17 +296,24 @@ static int rmi_firmware_update(struct rmi_driver_data *data,
 		return -EINVAL;
 	}
 
-	/* Only version 0 currently supported */
-	if (data->f34_container->fd.function_version != 0) {
+	f34 = dev_get_drvdata(&data->f34_container->dev);
+
+	if (f34->bl_version == 7) {
+		if (data->pdt_props & HAS_BSR) {
+			dev_err(dev, "%s: LTS not supported\n", __func__);
+			return -ENODEV;
+		}
+	} else if (f34->bl_version != 5) {
 		dev_warn(dev, "F34 V%d not supported!\n",
 			 data->f34_container->fd.function_version);
 		return -ENODEV;
 	}
 
-	f34 = dev_get_drvdata(&data->f34_container->dev);
-
 	/* Enter flash mode */
-	ret = rmi_f34_enable_flash(f34);
+	if (f34->bl_version == 7)
+		ret = rmi_f34v7_start_reflash(f34, fw);
+	else
+		ret = rmi_f34_enable_flash(f34);
 	if (ret)
 		return ret;
 
@@ -319,7 +330,7 @@ static int rmi_firmware_update(struct rmi_driver_data *data,
 	if (ret)
 		return ret;
 
-	if (!data->f01_bootloader_mode || !data->f34_container) {
+	if (!data->bootloader_mode || !data->f34_container) {
 		dev_warn(dev, "%s: No F34 present or not in bootloader!\n",
 				__func__);
 		return -EINVAL;
@@ -330,7 +341,10 @@ static int rmi_firmware_update(struct rmi_driver_data *data,
 	f34 = dev_get_drvdata(&data->f34_container->dev);
 
 	/* Perform firmware update */
-	ret = rmi_f34_update_firmware(f34, fw);
+	if (f34->bl_version == 7)
+		ret = rmi_f34v7_do_reflash(f34, fw);
+	else
+		ret = rmi_f34_update_firmware(f34, fw);
 
 	dev_info(&f34->fn->dev, "Firmware update complete, status:%d\n", ret);
 
@@ -363,6 +377,9 @@ static int rmi_firmware_update(struct rmi_driver_data *data,
 	return ret;
 }
 
+static int rmi_firmware_update(struct rmi_driver_data *data,
+			       const struct firmware *fw);
+
 static ssize_t rmi_driver_update_fw_store(struct device *dev,
 					  struct device_attribute *dattr,
 					  const char *buf, size_t count)
@@ -411,6 +428,7 @@ static int rmi_f34_probe(struct rmi_function *fn)
 	struct f34_data *f34;
 	unsigned char f34_queries[9];
 	bool has_config_id;
+	u8 version = fn->fd.function_version;
 	int ret;
 
 	f34 = devm_kzalloc(&fn->dev, sizeof(struct f34_data), GFP_KERNEL);
@@ -420,6 +438,14 @@ static int rmi_f34_probe(struct rmi_function *fn)
 	f34->fn = fn;
 	dev_set_drvdata(&fn->dev, f34);
 
+	/* v5 code only supported version 0, try V7 probe */
+	if (version > 0)
+		return rmi_f34v7_probe(f34);
+	else if (version != 0)
+		return -ENODEV;
+
+	f34->bl_version = 5;
+
 	ret = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr,
 			     f34_queries, sizeof(f34_queries));
 	if (ret) {