![Arvind Yadav](/assets/img/avatar_default.png)
attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 5287 448 0 5735 1667 drivers/input/rmi4/rmi_f34.o File size After adding 'const': text data bss dec hex filename 5339 384 0 5723 165b drivers/input/rmi4/rmi_f34.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
612 lines
15 KiB
C
612 lines
15 KiB
C
/*
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* Copyright (c) 2007-2016, Synaptics Incorporated
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* Copyright (C) 2016 Zodiac Inflight Innovations
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/rmi.h>
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#include <linux/firmware.h>
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#include <asm/unaligned.h>
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#include <asm/unaligned.h>
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#include <linux/bitops.h>
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#include "rmi_driver.h"
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#include "rmi_f34.h"
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static int rmi_f34_write_bootloader_id(struct f34_data *f34)
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{
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struct rmi_function *fn = f34->fn;
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struct rmi_device *rmi_dev = fn->rmi_dev;
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u8 bootloader_id[F34_BOOTLOADER_ID_LEN];
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int ret;
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ret = rmi_read_block(rmi_dev, fn->fd.query_base_addr,
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bootloader_id, sizeof(bootloader_id));
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if (ret) {
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dev_err(&fn->dev, "%s: Reading bootloader ID failed: %d\n",
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__func__, ret);
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return ret;
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}
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rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: writing bootloader id '%c%c'\n",
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__func__, bootloader_id[0], bootloader_id[1]);
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ret = rmi_write_block(rmi_dev,
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fn->fd.data_base_addr + F34_BLOCK_DATA_OFFSET,
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bootloader_id, sizeof(bootloader_id));
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if (ret) {
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dev_err(&fn->dev, "Failed to write bootloader ID: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int rmi_f34_command(struct f34_data *f34, u8 command,
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unsigned int timeout, bool write_bl_id)
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{
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struct rmi_function *fn = f34->fn;
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struct rmi_device *rmi_dev = fn->rmi_dev;
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int ret;
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if (write_bl_id) {
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ret = rmi_f34_write_bootloader_id(f34);
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if (ret)
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return ret;
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}
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init_completion(&f34->v5.cmd_done);
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ret = rmi_read(rmi_dev, f34->v5.ctrl_address, &f34->v5.status);
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if (ret) {
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dev_err(&f34->fn->dev,
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"%s: Failed to read cmd register: %d (command %#02x)\n",
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__func__, ret, command);
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return ret;
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}
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f34->v5.status |= command & 0x0f;
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ret = rmi_write(rmi_dev, f34->v5.ctrl_address, f34->v5.status);
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if (ret < 0) {
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dev_err(&f34->fn->dev,
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"Failed to write F34 command %#02x: %d\n",
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command, ret);
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return ret;
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}
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if (!wait_for_completion_timeout(&f34->v5.cmd_done,
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msecs_to_jiffies(timeout))) {
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ret = rmi_read(rmi_dev, f34->v5.ctrl_address, &f34->v5.status);
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if (ret) {
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dev_err(&f34->fn->dev,
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"%s: cmd %#02x timed out: %d\n",
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__func__, command, ret);
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return ret;
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}
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if (f34->v5.status & 0x7f) {
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dev_err(&f34->fn->dev,
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"%s: cmd %#02x timed out, status: %#02x\n",
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__func__, command, f34->v5.status);
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return -ETIMEDOUT;
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}
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}
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return 0;
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}
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static int rmi_f34_attention(struct rmi_function *fn, unsigned long *irq_bits)
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{
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struct f34_data *f34 = dev_get_drvdata(&fn->dev);
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int ret;
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u8 status;
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if (f34->bl_version == 5) {
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ret = rmi_read(f34->fn->rmi_dev, f34->v5.ctrl_address,
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&status);
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rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: status: %#02x, ret: %d\n",
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__func__, status, ret);
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if (!ret && !(status & 0x7f))
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complete(&f34->v5.cmd_done);
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} else {
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ret = rmi_read_block(f34->fn->rmi_dev,
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f34->fn->fd.data_base_addr +
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f34->v7.off.flash_status,
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&status, sizeof(status));
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rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: status: %#02x, ret: %d\n",
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__func__, status, ret);
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if (!ret && !(status & 0x1f))
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complete(&f34->v7.cmd_done);
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}
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return 0;
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}
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static int rmi_f34_write_blocks(struct f34_data *f34, const void *data,
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int block_count, u8 command)
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{
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struct rmi_function *fn = f34->fn;
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struct rmi_device *rmi_dev = fn->rmi_dev;
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u16 address = fn->fd.data_base_addr + F34_BLOCK_DATA_OFFSET;
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u8 start_address[] = { 0, 0 };
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int i;
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int ret;
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ret = rmi_write_block(rmi_dev, fn->fd.data_base_addr,
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start_address, sizeof(start_address));
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if (ret) {
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dev_err(&fn->dev, "Failed to write initial zeros: %d\n", ret);
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return ret;
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}
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for (i = 0; i < block_count; i++) {
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ret = rmi_write_block(rmi_dev, address,
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data, f34->v5.block_size);
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if (ret) {
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dev_err(&fn->dev,
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"failed to write block #%d: %d\n", i, ret);
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return ret;
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}
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ret = rmi_f34_command(f34, command, F34_IDLE_WAIT_MS, false);
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if (ret) {
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dev_err(&fn->dev,
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"Failed to write command for block #%d: %d\n",
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i, ret);
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return ret;
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}
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rmi_dbg(RMI_DEBUG_FN, &fn->dev, "wrote block %d of %d\n",
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i + 1, block_count);
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data += f34->v5.block_size;
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f34->update_progress += f34->v5.block_size;
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f34->update_status = (f34->update_progress * 100) /
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f34->update_size;
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}
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return 0;
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}
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static int rmi_f34_write_firmware(struct f34_data *f34, const void *data)
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{
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return rmi_f34_write_blocks(f34, data, f34->v5.fw_blocks,
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F34_WRITE_FW_BLOCK);
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}
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static int rmi_f34_write_config(struct f34_data *f34, const void *data)
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{
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return rmi_f34_write_blocks(f34, data, f34->v5.config_blocks,
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F34_WRITE_CONFIG_BLOCK);
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}
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static int rmi_f34_enable_flash(struct f34_data *f34)
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{
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return rmi_f34_command(f34, F34_ENABLE_FLASH_PROG,
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F34_ENABLE_WAIT_MS, true);
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}
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static int rmi_f34_flash_firmware(struct f34_data *f34,
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const struct rmi_f34_firmware *syn_fw)
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{
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struct rmi_function *fn = f34->fn;
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u32 image_size = le32_to_cpu(syn_fw->image_size);
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u32 config_size = le32_to_cpu(syn_fw->config_size);
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int ret;
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f34->update_progress = 0;
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f34->update_size = image_size + config_size;
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if (image_size) {
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dev_info(&fn->dev, "Erasing firmware...\n");
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ret = rmi_f34_command(f34, F34_ERASE_ALL,
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F34_ERASE_WAIT_MS, true);
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if (ret)
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return ret;
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dev_info(&fn->dev, "Writing firmware (%d bytes)...\n",
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image_size);
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ret = rmi_f34_write_firmware(f34, syn_fw->data);
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if (ret)
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return ret;
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}
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if (config_size) {
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/*
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* We only need to erase config if we haven't updated
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* firmware.
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*/
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if (!image_size) {
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dev_info(&fn->dev, "Erasing config...\n");
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ret = rmi_f34_command(f34, F34_ERASE_CONFIG,
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F34_ERASE_WAIT_MS, true);
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if (ret)
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return ret;
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}
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dev_info(&fn->dev, "Writing config (%d bytes)...\n",
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config_size);
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ret = rmi_f34_write_config(f34, &syn_fw->data[image_size]);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int rmi_f34_update_firmware(struct f34_data *f34,
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const struct firmware *fw)
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{
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const struct rmi_f34_firmware *syn_fw =
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(const struct rmi_f34_firmware *)fw->data;
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u32 image_size = le32_to_cpu(syn_fw->image_size);
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u32 config_size = le32_to_cpu(syn_fw->config_size);
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int ret;
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BUILD_BUG_ON(offsetof(struct rmi_f34_firmware, data) !=
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F34_FW_IMAGE_OFFSET);
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rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
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"FW size:%zd, checksum:%08x, image_size:%d, config_size:%d\n",
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fw->size,
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le32_to_cpu(syn_fw->checksum),
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image_size, config_size);
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rmi_dbg(RMI_DEBUG_FN, &f34->fn->dev,
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"FW bootloader_id:%02x, product_id:%.*s, info: %02x%02x\n",
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syn_fw->bootloader_version,
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(int)sizeof(syn_fw->product_id), syn_fw->product_id,
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syn_fw->product_info[0], syn_fw->product_info[1]);
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if (image_size && image_size != f34->v5.fw_blocks * f34->v5.block_size) {
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dev_err(&f34->fn->dev,
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"Bad firmware image: fw size %d, expected %d\n",
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image_size, f34->v5.fw_blocks * f34->v5.block_size);
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ret = -EILSEQ;
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goto out;
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}
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if (config_size &&
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config_size != f34->v5.config_blocks * f34->v5.block_size) {
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dev_err(&f34->fn->dev,
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"Bad firmware image: config size %d, expected %d\n",
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config_size,
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f34->v5.config_blocks * f34->v5.block_size);
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ret = -EILSEQ;
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goto out;
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}
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if (image_size && !config_size) {
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dev_err(&f34->fn->dev, "Bad firmware image: no config data\n");
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ret = -EILSEQ;
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goto out;
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}
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dev_info(&f34->fn->dev, "Firmware image OK\n");
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mutex_lock(&f34->v5.flash_mutex);
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ret = rmi_f34_flash_firmware(f34, syn_fw);
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mutex_unlock(&f34->v5.flash_mutex);
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out:
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return ret;
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}
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static int rmi_f34_status(struct rmi_function *fn)
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{
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struct f34_data *f34 = dev_get_drvdata(&fn->dev);
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/*
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* The status is the percentage complete, or once complete,
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* zero for success or a negative return code.
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*/
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return f34->update_status;
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}
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static ssize_t rmi_driver_bootloader_id_show(struct device *dev,
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struct device_attribute *dattr,
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char *buf)
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{
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struct rmi_driver_data *data = dev_get_drvdata(dev);
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struct rmi_function *fn = data->f34_container;
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struct f34_data *f34;
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if (fn) {
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f34 = dev_get_drvdata(&fn->dev);
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if (f34->bl_version == 5)
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return scnprintf(buf, PAGE_SIZE, "%c%c\n",
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f34->bootloader_id[0],
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f34->bootloader_id[1]);
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else
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return scnprintf(buf, PAGE_SIZE, "V%d.%d\n",
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f34->bootloader_id[1],
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f34->bootloader_id[0]);
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}
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return 0;
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}
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static DEVICE_ATTR(bootloader_id, 0444, rmi_driver_bootloader_id_show, NULL);
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static ssize_t rmi_driver_configuration_id_show(struct device *dev,
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struct device_attribute *dattr,
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char *buf)
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{
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struct rmi_driver_data *data = dev_get_drvdata(dev);
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struct rmi_function *fn = data->f34_container;
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struct f34_data *f34;
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if (fn) {
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f34 = dev_get_drvdata(&fn->dev);
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return scnprintf(buf, PAGE_SIZE, "%s\n", f34->configuration_id);
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}
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return 0;
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}
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static DEVICE_ATTR(configuration_id, 0444,
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rmi_driver_configuration_id_show, NULL);
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static int rmi_firmware_update(struct rmi_driver_data *data,
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const struct firmware *fw)
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{
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struct rmi_device *rmi_dev = data->rmi_dev;
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struct device *dev = &rmi_dev->dev;
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struct f34_data *f34;
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int ret;
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if (!data->f34_container) {
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dev_warn(dev, "%s: No F34 present!\n", __func__);
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return -EINVAL;
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}
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f34 = dev_get_drvdata(&data->f34_container->dev);
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if (f34->bl_version == 7) {
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if (data->pdt_props & HAS_BSR) {
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dev_err(dev, "%s: LTS not supported\n", __func__);
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return -ENODEV;
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}
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} else if (f34->bl_version != 5) {
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dev_warn(dev, "F34 V%d not supported!\n",
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data->f34_container->fd.function_version);
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return -ENODEV;
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}
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/* Enter flash mode */
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if (f34->bl_version == 7)
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ret = rmi_f34v7_start_reflash(f34, fw);
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else
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ret = rmi_f34_enable_flash(f34);
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if (ret)
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return ret;
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rmi_disable_irq(rmi_dev, false);
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/* Tear down functions and re-probe */
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rmi_free_function_list(rmi_dev);
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ret = rmi_probe_interrupts(data);
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if (ret)
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return ret;
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ret = rmi_init_functions(data);
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if (ret)
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return ret;
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if (!data->bootloader_mode || !data->f34_container) {
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dev_warn(dev, "%s: No F34 present or not in bootloader!\n",
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__func__);
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return -EINVAL;
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}
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rmi_enable_irq(rmi_dev, false);
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f34 = dev_get_drvdata(&data->f34_container->dev);
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/* Perform firmware update */
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if (f34->bl_version == 7)
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ret = rmi_f34v7_do_reflash(f34, fw);
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else
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ret = rmi_f34_update_firmware(f34, fw);
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if (ret) {
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f34->update_status = ret;
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dev_err(&f34->fn->dev,
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"Firmware update failed, status: %d\n", ret);
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} else {
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dev_info(&f34->fn->dev, "Firmware update complete\n");
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}
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rmi_disable_irq(rmi_dev, false);
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/* Re-probe */
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rmi_dbg(RMI_DEBUG_FN, dev, "Re-probing device\n");
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rmi_free_function_list(rmi_dev);
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ret = rmi_scan_pdt(rmi_dev, NULL, rmi_initial_reset);
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if (ret < 0)
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dev_warn(dev, "RMI reset failed!\n");
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ret = rmi_probe_interrupts(data);
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if (ret)
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return ret;
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ret = rmi_init_functions(data);
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if (ret)
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return ret;
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rmi_enable_irq(rmi_dev, false);
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if (data->f01_container->dev.driver)
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/* Driver already bound, so enable ATTN now. */
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return rmi_enable_sensor(rmi_dev);
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rmi_dbg(RMI_DEBUG_FN, dev, "%s complete\n", __func__);
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return ret;
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}
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static ssize_t rmi_driver_update_fw_store(struct device *dev,
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struct device_attribute *dattr,
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const char *buf, size_t count)
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{
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struct rmi_driver_data *data = dev_get_drvdata(dev);
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char fw_name[NAME_MAX];
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const struct firmware *fw;
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size_t copy_count = count;
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int ret;
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if (count == 0 || count >= NAME_MAX)
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return -EINVAL;
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if (buf[count - 1] == '\0' || buf[count - 1] == '\n')
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copy_count -= 1;
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strncpy(fw_name, buf, copy_count);
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fw_name[copy_count] = '\0';
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ret = request_firmware(&fw, fw_name, dev);
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if (ret)
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return ret;
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dev_info(dev, "Flashing %s\n", fw_name);
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ret = rmi_firmware_update(data, fw);
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release_firmware(fw);
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return ret ?: count;
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}
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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 scnprintf(buf, PAGE_SIZE, "%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,
|
|
};
|