path: root/drivers/input/touchscreen/hideep.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2012-2017 Hideep, Inc.
 */

#include <linux/module.h>
#include <linux/of.h>
#include <linux/firmware.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/acpi.h>
#include <linux/interrupt.h>
#include <linux/regmap.h>
#include <linux/sysfs.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/regulator/consumer.h>
#include <asm/unaligned.h>

#define HIDEEP_TS_NAME			"HiDeep Touchscreen"
#define HIDEEP_I2C_NAME			"hideep_ts"

#define HIDEEP_MT_MAX			10
#define HIDEEP_KEY_MAX			3

/* count(2) + touch data(100) + key data(6) */
#define HIDEEP_MAX_EVENT		108UL

#define HIDEEP_TOUCH_EVENT_INDEX	2
#define HIDEEP_KEY_EVENT_INDEX		102

/* Touch & key event */
#define HIDEEP_EVENT_ADDR		0x240

/* command list */
#define HIDEEP_RESET_CMD		0x9800

/* event bit */
#define HIDEEP_MT_RELEASED		BIT(4)
#define HIDEEP_KEY_PRESSED		BIT(7)
#define HIDEEP_KEY_FIRST_PRESSED	BIT(8)
#define HIDEEP_KEY_PRESSED_MASK		(HIDEEP_KEY_PRESSED | \
					 HIDEEP_KEY_FIRST_PRESSED)

#define HIDEEP_KEY_IDX_MASK		0x0f

/* For NVM */
#define HIDEEP_YRAM_BASE		0x40000000
#define HIDEEP_PERIPHERAL_BASE		0x50000000
#define HIDEEP_ESI_BASE			(HIDEEP_PERIPHERAL_BASE + 0x00000000)
#define HIDEEP_FLASH_BASE		(HIDEEP_PERIPHERAL_BASE + 0x01000000)
#define HIDEEP_SYSCON_BASE		(HIDEEP_PERIPHERAL_BASE + 0x02000000)

#define HIDEEP_SYSCON_MOD_CON		(HIDEEP_SYSCON_BASE + 0x0000)
#define HIDEEP_SYSCON_SPC_CON		(HIDEEP_SYSCON_BASE + 0x0004)
#define HIDEEP_SYSCON_CLK_CON		(HIDEEP_SYSCON_BASE + 0x0008)
#define HIDEEP_SYSCON_CLK_ENA		(HIDEEP_SYSCON_BASE + 0x000C)
#define HIDEEP_SYSCON_RST_CON		(HIDEEP_SYSCON_BASE + 0x0010)
#define HIDEEP_SYSCON_WDT_CON		(HIDEEP_SYSCON_BASE + 0x0014)
#define HIDEEP_SYSCON_WDT_CNT		(HIDEEP_SYSCON_BASE + 0x0018)
#define HIDEEP_SYSCON_PWR_CON		(HIDEEP_SYSCON_BASE + 0x0020)
#define HIDEEP_SYSCON_PGM_ID		(HIDEEP_SYSCON_BASE + 0x00F4)

#define HIDEEP_FLASH_CON		(HIDEEP_FLASH_BASE + 0x0000)
#define HIDEEP_FLASH_STA		(HIDEEP_FLASH_BASE + 0x0004)
#define HIDEEP_FLASH_CFG		(HIDEEP_FLASH_BASE + 0x0008)
#define HIDEEP_FLASH_TIM		(HIDEEP_FLASH_BASE + 0x000C)
#define HIDEEP_FLASH_CACHE_CFG		(HIDEEP_FLASH_BASE + 0x0010)
#define HIDEEP_FLASH_PIO_SIG		(HIDEEP_FLASH_BASE + 0x400000)

#define HIDEEP_ESI_TX_INVALID		(HIDEEP_ESI_BASE + 0x0008)

#define HIDEEP_PERASE			0x00040000
#define HIDEEP_WRONLY			0x00100000

#define HIDEEP_NVM_MASK_OFS		0x0000000C
#define HIDEEP_NVM_DEFAULT_PAGE		0
#define HIDEEP_NVM_SFR_WPAGE		1
#define HIDEEP_NVM_SFR_RPAGE		2

#define HIDEEP_PIO_SIG			0x00400000
#define HIDEEP_PROT_MODE		0x03400000

#define HIDEEP_NVM_PAGE_SIZE		128

#define HIDEEP_DWZ_INFO			0x000002C0

struct hideep_event {
	__le16 x;
	__le16 y;
	__le16 z;
	u8 w;
	u8 flag;
	u8 type;
	u8 index;
};

struct dwz_info {
	__be32 code_start;
	u8 code_crc[12];

	__be32 c_code_start;
	__be16 gen_ver;
	__be16 c_code_len;

	__be32 vr_start;
	__be16 rsv0;
	__be16 vr_len;

	__be32 ft_start;
	__be16 vr_version;
	__be16 ft_len;

	__be16 core_ver;
	__be16 boot_ver;

	__be16 release_ver;
	__be16 custom_ver;

	u8 factory_id;
	u8 panel_type;
	u8 model_name[6];

	__be16 extra_option;
	__be16 product_code;

	__be16 vendor_id;
	__be16 product_id;
};

struct pgm_packet {
	struct {
		u8 unused[3];
		u8 len;
		__be32 addr;
	} header;
	__be32 payload[HIDEEP_NVM_PAGE_SIZE / sizeof(__be32)];
};

#define HIDEEP_XFER_BUF_SIZE	sizeof(struct pgm_packet)

struct hideep_ts {
	struct i2c_client *client;
	struct input_dev *input_dev;
	struct regmap *reg;

	struct touchscreen_properties prop;

	struct gpio_desc *reset_gpio;

	struct regulator *vcc_vdd;
	struct regulator *vcc_vid;

	struct mutex dev_mutex;

	u32 tch_count;
	u32 lpm_count;

	/*
	 * Data buffer to read packet from the device (contacts and key
	 * states). We align it on double-word boundary to keep word-sized
	 * fields in contact data and double-word-sized fields in program
	 * packet aligned.
	 */
	u8 xfer_buf[HIDEEP_XFER_BUF_SIZE] __aligned(4);

	int key_num;
	u32 key_codes[HIDEEP_KEY_MAX];

	struct dwz_info dwz_info;

	unsigned int fw_size;
	u32 nvm_mask;
};

static int hideep_pgm_w_mem(struct hideep_ts *ts, u32 addr,
			    const __be32 *data, size_t count)
{
	struct pgm_packet *packet = (void *)ts->xfer_buf;
	size_t len = count * sizeof(*data);
	struct i2c_msg msg = {
		.addr	= ts->client->addr,
		.len	= len + sizeof(packet->header.len) +
				sizeof(packet->header.addr),
		.buf	= &packet->header.len,
	};
	int ret;

	if (len > HIDEEP_NVM_PAGE_SIZE)
		return -EINVAL;

	packet->header.len = 0x80 | (count - 1);
	packet->header.addr = cpu_to_be32(addr);
	memcpy(packet->payload, data, len);

	ret = i2c_transfer(ts->client->adapter, &msg, 1);
	if (ret != 1)
		return ret < 0 ? ret : -EIO;

	return 0;
}

static int hideep_pgm_r_mem(struct hideep_ts *ts, u32 addr,
			    __be32 *data, size_t count)
{
	struct pgm_packet *packet = (void *)ts->xfer_buf;
	size_t len = count * sizeof(*data);
	struct i2c_msg msg[] = {
		{
			.addr	= ts->client->addr,
			.len	= sizeof(packet->header.