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path: root/drivers/input/rmi4/rmi_f34.c
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Diffstat (limited to 'drivers/input/rmi4/rmi_f34.c')
-rw-r--r--drivers/input/rmi4/rmi_f34.c608
1 files changed, 608 insertions, 0 deletions
diff --git a/drivers/input/rmi4/rmi_f34.c b/drivers/input/rmi4/rmi_f34.c
new file mode 100644
index 0000000000..0d9a5756e3
--- /dev/null
+++ b/drivers/input/rmi4/rmi_f34.c
@@ -0,0 +1,608 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2007-2016, Synaptics Incorporated
+ * Copyright (C) 2016 Zodiac Inflight Innovations
+ */
+
+#include <linux/kernel.h>
+#include <linux/rmi.h>
+#include <linux/firmware.h>
+#include <asm/unaligned.h>
+#include <linux/bitops.h>
+
+#include "rmi_driver.h"
+#include "rmi_f34.h"
+
+static int rmi_f34_write_bootloader_id(struct f34_data *f34)
+{
+ struct rmi_function *fn = f34->fn;
+ struct rmi_device *rmi_dev = fn->rmi_dev;
+ u8 bootloader_id[F34_BOOTLOADER_ID_LEN];
+ int ret;
+
+ ret = rmi_read_block(rmi_dev, fn->fd.query_base_addr,
+ bootloader_id, sizeof(bootloader_id));
+ if (ret) {
+ dev_err(&fn->dev, "%s: Reading bootloader ID failed: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: writing bootloader id '%c%c'\n",
+ __func__, bootloader_id[0], bootloader_id[1]);
+
+ ret = rmi_write_block(rmi_dev,
+ fn->fd.data_base_addr + F34_BLOCK_DATA_OFFSET,
+ bootloader_id, sizeof(bootloader_id));
+ if (ret) {
+ dev_err(&fn->dev, "Failed to write bootloader ID: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int rmi_f34_command(struct f34_data *f34, u8 command,
+ unsigned int timeout, bool write_bl_id)
+{
+ struct rmi_function *fn = f34->fn;
+ struct rmi_device *rmi_dev = fn->rmi_dev;
+ int ret;
+
+ if (write_bl_id) {
+ ret = rmi_f34_write_bootloader_id(f34);
+ if (ret)
+ return ret;
+ }
+
+ init_completion(&f34->v5.cmd_done);
+
+ ret = rmi_read(rmi_dev, f34->v5.ctrl_address, &f34->v5.status);
+ if (ret) {
+ dev_err(&f34->fn->dev,
+ "%s: Failed to read cmd register: %d (command %#02x)\n",
+ __func__, ret, command);
+ return ret;
+ }
+
+ f34->v5.status |= command & 0x0f;
+
+ ret = rmi_write(rmi_dev, f34->v5.ctrl_address, f34->v5.status);
+ if (ret < 0) {
+ dev_err(&f34->fn->dev,
+ "Failed to write F34 command %#02x: %d\n",
+ command, ret);
+ return ret;
+ }
+
+ if (!wait_for_completion_timeout(&f34->v5.cmd_done,
+ msecs_to_jiffies(timeout))) {
+
+ ret = rmi_read(rmi_dev, f34->v5.ctrl_address, &f34->v5.status);
+ if (ret) {
+ dev_err(&f34->fn->dev,
+ "%s: cmd %#02x timed out: %d\n",
+ __func__, command, ret);
+ return ret;
+ }
+
+ if (f34->v5.status & 0x7f) {
+ dev_err(&f34->fn->dev,
+ "%s: cmd %#02x timed out, status: %#02x\n",
+ __func__, command, f34->v5.status);
+ return -ETIMEDOUT;
+ }
+ }
+
+ return 0;
+}
+
+static irqreturn_t rmi_f34_attention(int irq, void *ctx)
+{
+ struct rmi_function *fn = ctx;
+ struct f34_data *f34 = dev_get_drvdata(&fn->dev);
+ int ret;
+ u8 status;
+
+ 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);
+
+ if (!ret && !(status & 0x7f))
+ complete(&f34->v5.cmd_done);
+ } else {
+ ret = rmi_read_block(f34->fn->rmi_dev,
+ f34->fn->fd.data_base_addr +
+ V7_COMMAND_OFFSET,
+ &status, sizeof(status));
+ rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev, "%s: cmd: %#02x, ret: %d\n",
+ __func__, status, ret);
+
+ if (!ret && status == CMD_V7_IDLE)
+ complete(&f34->v7.cmd_done);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int rmi_f34_write_blocks(struct f34_data *f34, const void *data,
+ int block_count, u8 command)
+{
+ struct rmi_function *fn = f34->fn;
+ struct rmi_device *rmi_dev = fn->rmi_dev;
+ u16 address = fn->fd.data_base_addr + F34_BLOCK_DATA_OFFSET;
+ u8 start_address[] = { 0, 0 };
+ int i;
+ int ret;
+
+ ret = rmi_write_block(rmi_dev, fn->fd.data_base_addr,
+ start_address, sizeof(start_address));
+ if (ret) {
+ dev_err(&fn->dev, "Failed to write initial zeros: %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < block_count; i++) {
+ ret = rmi_write_block(rmi_dev, address,
+ data, f34->v5.block_size);
+ if (ret) {
+ dev_err(&fn->dev,
+ "failed to write block #%d: %d\n", i, ret);
+ return ret;
+ }
+
+ ret = rmi_f34_command(f34, command, F34_IDLE_WAIT_MS, false);
+ if (ret) {
+ dev_err(&fn->dev,
+ "Failed to write command for block #%d: %d\n",
+ i, ret);
+ return ret;
+ }
+
+ rmi_dbg(RMI_DEBUG_FN, &fn->dev, "wrote block %d of %d\n",
+ i + 1, block_count);
+
+ data += f34->v5.block_size;
+ f34->update_progress += f34->v5.block_size;
+ f34->update_status = (f34->update_progress * 100) /
+ f34->update_size;
+ }
+
+ return 0;
+}
+
+static int rmi_f34_write_firmware(struct f34_data *f34, const void *data)
+{
+ return rmi_f34_write_blocks(f34, data, f34->v5.fw_blocks,
+ F34_WRITE_FW_BLOCK);
+}
+
+static int rmi_f34_write_config(struct f34_data *f34, const void *data)
+{
+ return rmi_f34_write_blocks(f34, data, f34->v5.config_blocks,
+ F34_WRITE_CONFIG_BLOCK);
+}
+
+static int rmi_f34_enable_flash(struct f34_data *f34)
+{
+ return rmi_f34_command(f34, F34_ENABLE_FLASH_PROG,
+ F34_ENABLE_WAIT_MS, true);
+}
+
+static int rmi_f34_flash_firmware(struct f34_data *f34,
+ const struct rmi_f34_firmware *syn_fw)
+{
+ struct rmi_function *fn = f34->fn;
+ u32 image_size = le32_to_cpu(syn_fw->image_size);
+ u32 config_size = le32_to_cpu(syn_fw->config_size);
+ int ret;
+
+ f34->update_progress = 0;
+ f34->update_size = image_size + config_size;
+
+ if (image_size) {
+ dev_info(&fn->dev, "Erasing firmware...\n");
+ ret = rmi_f34_command(f34, F34_ERASE_ALL,
+ F34_ERASE_WAIT_MS, true);
+ if (ret)
+ return ret;
+
+ dev_info(&fn->dev, "Writing firmware (%d bytes)...\n",
+ image_size);
+ ret = rmi_f34_write_firmware(f34, syn_fw->data);
+ if (ret)
+ return ret;
+ }
+
+ if (config_size) {
+ /*
+ * We only need to erase config if we haven't updated
+ * firmware.
+ */
+ if (!image_size) {
+ dev_info(&fn->dev, "Erasing config...\n");
+ ret = rmi_f34_command(f34, F34_ERASE_CONFIG,
+ F34_ERASE_WAIT_MS, true);
+ if (ret)
+ return ret;
+ }
+
+ dev_info(&fn->dev, "Writing config (%d bytes)...\n",
+ config_size);
+ ret = rmi_f34_write_config(f34, &syn_fw->data[image_size]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int rmi_f34_update_firmware(struct f34_data *f34,
+ const struct firmware *fw)
+{
+ const struct rmi_f34_firmware *syn_fw =
+ (const struct rmi_f34_firmware *)fw->data;
+ u32 image_size = le32_to_cpu(syn_fw->image_size);
+ u32 config_size = le32_to_cpu(syn_fw->config_size);
+ int ret;
+
+ BUILD_BUG_ON(offsetof(struct rmi_f34_firmware, data) !=
+ F34_FW_IMAGE_OFFSET);
+
+ rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
+ "FW size:%zd, checksum:%08x, image_size:%d, config_size:%d\n",
+ fw->size,
+ le32_to_cpu(syn_fw->checksum),
+ image_size, config_size);
+
+ rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
+ "FW bootloader_id:%02x, product_id:%.*s, info: %02x%02x\n",
+ syn_fw->bootloader_version,
+ (int)sizeof(syn_fw->product_id), syn_fw->product_id,
+ syn_fw->product_info[0], syn_fw->product_info[1]);
+
+ if (image_size && image_size != f34->v5.fw_blocks * f34->v5.block_size) {
+ dev_err(&f34->fn->dev,
+ "Bad firmware image: fw size %d, expected %d\n",
+ image_size, f34->v5.fw_blocks * f34->v5.block_size);
+ ret = -EILSEQ;
+ goto out;
+ }
+
+ if (config_size &&
+ config_size != f34->v5.config_blocks * f34->v5.block_size) {
+ dev_err(&f34->fn->dev,
+ "Bad firmware image: config size %d, expected %d\n",
+ config_size,
+ f34->v5.config_blocks * f34->v5.block_size);
+ ret = -EILSEQ;
+ goto out;
+ }
+
+ if (image_size && !config_size) {
+ dev_err(&f34->fn->dev, "Bad firmware image: no config data\n");
+ ret = -EILSEQ;
+ goto out;
+ }
+
+ dev_info(&f34->fn->dev, "Firmware image OK\n");
+ mutex_lock(&f34->v5.flash_mutex);
+
+ ret = rmi_f34_flash_firmware(f34, syn_fw);
+
+ mutex_unlock(&f34->v5.flash_mutex);
+
+out:
+ return ret;
+}
+
+static int rmi_f34_status(struct rmi_function *fn)
+{
+ struct f34_data *f34 = dev_get_drvdata(&fn->dev);
+
+ /*
+ * The status is the percentage complete, or once complete,
+ * zero for success or a negative return code.
+ */
+ return f34->update_status;
+}
+
+static ssize_t rmi_driver_bootloader_id_show(struct device *dev,
+ struct device_attribute *dattr,
+ char *buf)
+{
+ struct rmi_driver_data *data = dev_get_drvdata(dev);
+ struct rmi_function *fn = data->f34_container;
+ struct f34_data *f34;
+
+ if (fn) {
+ f34 = dev_get_drvdata(&fn->dev);
+
+ if (f34->bl_version == 5)
+ return sysfs_emit(buf, "%c%c\n",
+ f34->bootloader_id[0],
+ f34->bootloader_id[1]);
+ else
+ return sysfs_emit(buf, "V%d.%d\n",
+ f34->bootloader_id[1],
+ f34->bootloader_id[0]);
+ }
+
+ return 0;
+}
+
+static DEVICE_ATTR(bootloader_id, 0444, rmi_driver_bootloader_id_show, NULL);
+
+static ssize_t rmi_driver_configuration_id_show(struct device *dev,
+ struct device_attribute *dattr,
+ char *buf)
+{
+ struct rmi_driver_data *data = dev_get_drvdata(dev);
+ struct rmi_function *fn = data->f34_container;
+ struct f34_data *f34;
+
+ if (fn) {
+ f34 = dev_get_drvdata(&fn->dev);
+
+ return sysfs_emit(buf, "%s\n", f34->configuration_id);
+ }
+
+ return 0;
+}
+
+static DEVICE_ATTR(configuration_id, 0444,
+ rmi_driver_configuration_id_show, NULL);
+
+static int rmi_firmware_update(struct rmi_driver_data *data,
+ const struct firmware *fw)
+{
+ struct rmi_device *rmi_dev = data->rmi_dev;
+ struct device *dev = &rmi_dev->dev;
+ struct f34_data *f34;
+ int ret;
+
+ if (!data->f34_container) {
+ dev_warn(dev, "%s: No F34 present!\n", __func__);
+ return -EINVAL;
+ }
+
+ 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;
+ }
+
+ /* Enter flash mode */
+ if (f34->bl_version >= 7)
+ ret = rmi_f34v7_start_reflash(f34, fw);
+ else
+ ret = rmi_f34_enable_flash(f34);
+ if (ret)
+ return ret;
+
+ rmi_disable_irq(rmi_dev, false);
+
+ /* Tear down functions and re-probe */
+ rmi_free_function_list(rmi_dev);
+
+ ret = rmi_probe_interrupts(data);
+ if (ret)
+ return ret;
+
+ ret = rmi_init_functions(data);
+ if (ret)
+ return ret;
+
+ if (!data->bootloader_mode || !data->f34_container) {
+ dev_warn(dev, "%s: No F34 present or not in bootloader!\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ rmi_enable_irq(rmi_dev, false);
+
+ f34 = dev_get_drvdata(&data->f34_container->dev);
+
+ /* Perform firmware update */
+ if (f34->bl_version >= 7)
+ ret = rmi_f34v7_do_reflash(f34, fw);
+ else
+ ret = rmi_f34_update_firmware(f34, fw);
+
+ if (ret) {
+ f34->update_status = ret;
+ dev_err(&f34->fn->dev,
+ "Firmware update failed, status: %d\n", ret);
+ } else {
+ dev_info(&f34->fn->dev, "Firmware update complete\n");
+ }
+
+ rmi_disable_irq(rmi_dev, false);
+
+ /* Re-probe */
+ rmi_dbg(RMI_DEBUG_FN, dev, "Re-probing device\n");
+ rmi_free_function_list(rmi_dev);
+
+ ret = rmi_scan_pdt(rmi_dev, NULL, rmi_initial_reset);
+ if (ret < 0)
+ dev_warn(dev, "RMI reset failed!\n");
+
+ ret = rmi_probe_interrupts(data);
+ if (ret)
+ return ret;
+
+ ret = rmi_init_functions(data);
+ if (ret)
+ return ret;
+
+ rmi_enable_irq(rmi_dev, false);
+
+ if (data->f01_container->dev.driver)
+ /* Driver already bound, so enable ATTN now. */
+ return rmi_enable_sensor(rmi_dev);
+
+ rmi_dbg(RMI_DEBUG_FN, dev, "%s complete\n", __func__);
+
+ return ret;
+}
+
+static ssize_t rmi_driver_update_fw_store(struct device *dev,
+ struct device_attribute *dattr,
+ const char *buf, size_t count)
+{
+ struct rmi_driver_data *data = dev_get_drvdata(dev);
+ char fw_name[NAME_MAX];
+ const struct firmware *fw;
+ size_t copy_count = count;
+ int ret;
+
+ if (count == 0 || count >= NAME_MAX)
+ return -EINVAL;
+
+ if (buf[count - 1] == '\0' || buf[count - 1] == '\n')
+ copy_count -= 1;
+
+ strncpy(fw_name, buf, copy_count);
+ fw_name[copy_count] = '\0';
+
+ ret = request_firmware(&fw, fw_name, dev);
+ if (ret)
+ return ret;
+
+ dev_info(dev, "Flashing %s\n", fw_name);
+
+ ret = rmi_firmware_update(data, fw);
+
+ release_firmware(fw);
+
+ return ret ?: count;
+}
+
+static DEVICE_ATTR(update_fw, 0200, NULL, rmi_driver_update_fw_store);
+
+static ssize_t rmi_driver_update_fw_status_show(struct device *dev,
+ struct device_attribute *dattr,
+ char *buf)
+{
+ struct rmi_driver_data *data = dev_get_drvdata(dev);
+ int update_status = 0;
+
+ if (data->f34_container)
+ update_status = rmi_f34_status(data->f34_container);
+
+ return sysfs_emit(buf, "%d\n", update_status);
+}
+
+static DEVICE_ATTR(update_fw_status, 0444,
+ rmi_driver_update_fw_status_show, NULL);
+
+static struct attribute *rmi_firmware_attrs[] = {
+ &dev_attr_bootloader_id.attr,
+ &dev_attr_configuration_id.attr,
+ &dev_attr_update_fw.attr,
+ &dev_attr_update_fw_status.attr,
+ NULL
+};
+
+static const struct attribute_group rmi_firmware_attr_group = {
+ .attrs = rmi_firmware_attrs,
+};
+
+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);
+ if (!f34)
+ return -ENOMEM;
+
+ 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);
+
+ f34->bl_version = 5;
+
+ ret = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr,
+ f34_queries, sizeof(f34_queries));
+ if (ret) {
+ dev_err(&fn->dev, "%s: Failed to query properties\n",
+ __func__);
+ return ret;
+ }
+
+ snprintf(f34->bootloader_id, sizeof(f34->bootloader_id),
+ "%c%c", f34_queries[0], f34_queries[1]);
+
+ mutex_init(&f34->v5.flash_mutex);
+ init_completion(&f34->v5.cmd_done);
+
+ f34->v5.block_size = get_unaligned_le16(&f34_queries[3]);
+ f34->v5.fw_blocks = get_unaligned_le16(&f34_queries[5]);
+ f34->v5.config_blocks = get_unaligned_le16(&f34_queries[7]);
+ f34->v5.ctrl_address = fn->fd.data_base_addr + F34_BLOCK_DATA_OFFSET +
+ f34->v5.block_size;
+ has_config_id = f34_queries[2] & (1 << 2);
+
+ rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Bootloader ID: %s\n",
+ f34->bootloader_id);
+ rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Block size: %d\n",
+ f34->v5.block_size);
+ rmi_dbg(RMI_DEBUG_FN, &fn->dev, "FW blocks: %d\n",
+ f34->v5.fw_blocks);
+ rmi_dbg(RMI_DEBUG_FN, &fn->dev, "CFG blocks: %d\n",
+ f34->v5.config_blocks);
+
+ if (has_config_id) {
+ ret = rmi_read_block(fn->rmi_dev, fn->fd.control_base_addr,
+ f34_queries, sizeof(f34_queries));
+ if (ret) {
+ dev_err(&fn->dev, "Failed to read F34 config ID\n");
+ return ret;
+ }
+
+ snprintf(f34->configuration_id, sizeof(f34->configuration_id),
+ "%02x%02x%02x%02x",
+ f34_queries[0], f34_queries[1],
+ f34_queries[2], f34_queries[3]);
+
+ rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Configuration ID: %s\n",
+ f34->configuration_id);
+ }
+
+ return 0;
+}
+
+int rmi_f34_create_sysfs(struct rmi_device *rmi_dev)
+{
+ return sysfs_create_group(&rmi_dev->dev.kobj, &rmi_firmware_attr_group);
+}
+
+void rmi_f34_remove_sysfs(struct rmi_device *rmi_dev)
+{
+ sysfs_remove_group(&rmi_dev->dev.kobj, &rmi_firmware_attr_group);
+}
+
+struct rmi_function_handler rmi_f34_handler = {
+ .driver = {
+ .name = "rmi4_f34",
+ },
+ .func = 0x34,
+ .probe = rmi_f34_probe,
+ .attention = rmi_f34_attention,
+};