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// SPDX-License-Identifier: GPL-2.0
/*
* Platform device driver for devices with MCU support.
*
* Copyright (C) 2022 Google LLC
*/
#include <linux/moduleparam.h>
#include "gxp-internal.h"
#include "gxp-mcu-fs.h"
#include "gxp-mcu-platform.h"
#include "gxp-mcu.h"
#include "gxp-usage-stats.h"
#if IS_ENABLED(CONFIG_GXP_TEST)
char *gxp_work_mode_name = "direct";
#else
static char *gxp_work_mode_name = "direct";
#endif
module_param_named(work_mode, gxp_work_mode_name, charp, 0660);
static char *chip_rev = "a0";
module_param(chip_rev, charp, 0660);
struct gxp_mcu *gxp_mcu_of(struct gxp_dev *gxp)
{
return &(to_mcu_dev(gxp)->mcu);
}
struct gxp_mcu_firmware *gxp_mcu_firmware_of(struct gxp_dev *gxp)
{
return &(gxp_mcu_of(gxp)->fw);
}
bool gxp_is_direct_mode(struct gxp_dev *gxp)
{
struct gxp_mcu_dev *mcu_dev = to_mcu_dev(gxp);
return mcu_dev->mode == DIRECT;
}
enum gxp_chip_revision gxp_get_chip_revision(struct gxp_dev *gxp)
{
if (!strcmp(chip_rev, "a0"))
return GXP_CHIP_A0;
if (!strcmp(chip_rev, "b0"))
return GXP_CHIP_B0;
return GXP_CHIP_ANY;
}
int gxp_mcu_platform_after_probe(struct gxp_dev *gxp)
{
if (gxp_is_direct_mode(gxp))
return 0;
gxp_usage_stats_init(gxp);
return gxp_mcu_init(gxp, gxp_mcu_of(gxp));
}
void gxp_mcu_platform_before_remove(struct gxp_dev *gxp)
{
if (gxp_is_direct_mode(gxp))
return;
gxp_mcu_exit(gxp_mcu_of(gxp));
gxp_usage_stats_exit(gxp);
}
void gxp_mcu_dev_init(struct gxp_mcu_dev *mcu_dev)
{
struct gxp_dev *gxp = &mcu_dev->gxp;
mcu_dev->mode = gxp_dev_parse_work_mode(gxp_work_mode_name);
gxp->after_probe = gxp_mcu_platform_after_probe;
gxp->before_remove = gxp_mcu_platform_before_remove;
gxp->handle_ioctl = gxp_mcu_ioctl;
gxp->handle_mmap = gxp_mcu_mmap;
}
enum gxp_work_mode gxp_dev_parse_work_mode(const char *work_mode)
{
if (!strcmp(work_mode, "mcu"))
return MCU;
return DIRECT;
}
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