mirror of https://gitee.com/openkylin/linux.git
1237 lines
28 KiB
C
1237 lines
28 KiB
C
/*
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* Raydium touchscreen I2C driver.
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*
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* Copyright (C) 2012-2014, Raydium Semiconductor Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2, and only version 2, as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Raydium reserves the right to make changes without further notice
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* to the materials described herein. Raydium does not assume any
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* liability arising out of the application described herein.
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*
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* Contact Raydium Semiconductor Corporation at www.rad-ic.com
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*/
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#include <linux/acpi.h>
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#include <linux/delay.h>
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#include <linux/firmware.h>
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#include <linux/gpio/consumer.h>
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#include <linux/i2c.h>
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#include <linux/input.h>
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#include <linux/input/mt.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <asm/unaligned.h>
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/* Slave I2C mode */
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#define RM_BOOT_BLDR 0x02
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#define RM_BOOT_MAIN 0x03
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/* I2C bootoloader commands */
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#define RM_CMD_BOOT_PAGE_WRT 0x0B /* send bl page write */
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#define RM_CMD_BOOT_WRT 0x11 /* send bl write */
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#define RM_CMD_BOOT_ACK 0x22 /* send ack*/
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#define RM_CMD_BOOT_CHK 0x33 /* send data check */
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#define RM_CMD_BOOT_READ 0x44 /* send wait bl data ready*/
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#define RM_BOOT_RDY 0xFF /* bl data ready */
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/* I2C main commands */
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#define RM_CMD_QUERY_BANK 0x2B
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#define RM_CMD_DATA_BANK 0x4D
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#define RM_CMD_ENTER_SLEEP 0x4E
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#define RM_CMD_BANK_SWITCH 0xAA
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#define RM_RESET_MSG_ADDR 0x40000004
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#define RM_MAX_READ_SIZE 56
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#define RM_PACKET_CRC_SIZE 2
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/* Touch relative info */
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#define RM_MAX_RETRIES 3
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#define RM_MAX_TOUCH_NUM 10
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#define RM_BOOT_DELAY_MS 100
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/* Offsets in contact data */
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#define RM_CONTACT_STATE_POS 0
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#define RM_CONTACT_X_POS 1
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#define RM_CONTACT_Y_POS 3
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#define RM_CONTACT_PRESSURE_POS 5
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#define RM_CONTACT_WIDTH_X_POS 6
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#define RM_CONTACT_WIDTH_Y_POS 7
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/* Bootloader relative info */
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#define RM_BL_WRT_CMD_SIZE 3 /* bl flash wrt cmd size */
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#define RM_BL_WRT_PKG_SIZE 32 /* bl wrt pkg size */
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#define RM_BL_WRT_LEN (RM_BL_WRT_PKG_SIZE + RM_BL_WRT_CMD_SIZE)
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#define RM_FW_PAGE_SIZE 128
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#define RM_MAX_FW_RETRIES 30
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#define RM_MAX_FW_SIZE 0xD000
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#define RM_POWERON_DELAY_USEC 500
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#define RM_RESET_DELAY_MSEC 50
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enum raydium_bl_cmd {
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BL_HEADER = 0,
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BL_PAGE_STR,
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BL_PKG_IDX,
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BL_DATA_STR,
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};
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enum raydium_bl_ack {
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RAYDIUM_ACK_NULL = 0,
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RAYDIUM_WAIT_READY,
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RAYDIUM_PATH_READY,
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};
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enum raydium_boot_mode {
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RAYDIUM_TS_MAIN = 0,
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RAYDIUM_TS_BLDR,
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};
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/* Response to RM_CMD_DATA_BANK request */
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struct raydium_data_info {
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__le32 data_bank_addr;
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u8 pkg_size;
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u8 tp_info_size;
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};
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struct raydium_info {
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__le32 hw_ver; /*device version */
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u8 main_ver;
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u8 sub_ver;
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__le16 ft_ver; /* test version */
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u8 x_num;
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u8 y_num;
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__le16 x_max;
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__le16 y_max;
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u8 x_res; /* units/mm */
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u8 y_res; /* units/mm */
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};
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/* struct raydium_data - represents state of Raydium touchscreen device */
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struct raydium_data {
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struct i2c_client *client;
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struct input_dev *input;
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struct regulator *avdd;
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struct regulator *vccio;
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struct gpio_desc *reset_gpio;
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struct raydium_info info;
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struct mutex sysfs_mutex;
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u8 *report_data;
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u32 data_bank_addr;
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u8 report_size;
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u8 contact_size;
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u8 pkg_size;
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enum raydium_boot_mode boot_mode;
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bool wake_irq_enabled;
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};
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static int raydium_i2c_send(struct i2c_client *client,
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u8 addr, const void *data, size_t len)
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{
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u8 *buf;
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int tries = 0;
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int ret;
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buf = kmalloc(len + 1, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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buf[0] = addr;
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memcpy(buf + 1, data, len);
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do {
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ret = i2c_master_send(client, buf, len + 1);
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if (likely(ret == len + 1))
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break;
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msleep(20);
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} while (++tries < RM_MAX_RETRIES);
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kfree(buf);
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if (unlikely(ret != len + 1)) {
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if (ret >= 0)
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ret = -EIO;
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dev_err(&client->dev, "%s failed: %d\n", __func__, 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 raydium_i2c_read(struct i2c_client *client,
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u8 addr, void *data, size_t len)
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{
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struct i2c_msg xfer[] = {
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{
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.addr = client->addr,
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.len = 1,
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.buf = &addr,
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},
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{
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.addr = client->addr,
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.flags = I2C_M_RD,
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.len = len,
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.buf = data,
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}
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};
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int ret;
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ret = i2c_transfer(client->adapter, xfer, ARRAY_SIZE(xfer));
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if (unlikely(ret != ARRAY_SIZE(xfer)))
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return ret < 0 ? ret : -EIO;
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return 0;
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}
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static int raydium_i2c_read_message(struct i2c_client *client,
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u32 addr, void *data, size_t len)
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{
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__be32 be_addr;
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size_t xfer_len;
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int error;
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while (len) {
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xfer_len = min_t(size_t, len, RM_MAX_READ_SIZE);
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be_addr = cpu_to_be32(addr);
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error = raydium_i2c_send(client, RM_CMD_BANK_SWITCH,
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&be_addr, sizeof(be_addr));
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if (!error)
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error = raydium_i2c_read(client, addr & 0xff,
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data, xfer_len);
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if (error)
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return error;
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len -= xfer_len;
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data += xfer_len;
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addr += xfer_len;
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}
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return 0;
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}
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static int raydium_i2c_send_message(struct i2c_client *client,
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u32 addr, const void *data, size_t len)
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{
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__be32 be_addr = cpu_to_be32(addr);
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int error;
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error = raydium_i2c_send(client, RM_CMD_BANK_SWITCH,
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&be_addr, sizeof(be_addr));
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if (!error)
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error = raydium_i2c_send(client, addr & 0xff, data, len);
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return error;
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}
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static int raydium_i2c_sw_reset(struct i2c_client *client)
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{
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const u8 soft_rst_cmd = 0x01;
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int error;
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error = raydium_i2c_send_message(client, RM_RESET_MSG_ADDR,
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&soft_rst_cmd, sizeof(soft_rst_cmd));
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if (error) {
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dev_err(&client->dev, "software reset failed: %d\n", error);
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return error;
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}
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msleep(RM_RESET_DELAY_MSEC);
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return 0;
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}
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static int raydium_i2c_query_ts_info(struct raydium_data *ts)
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{
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struct i2c_client *client = ts->client;
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struct raydium_data_info data_info;
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__le32 query_bank_addr;
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int error, retry_cnt;
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for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
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error = raydium_i2c_read(client, RM_CMD_DATA_BANK,
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&data_info, sizeof(data_info));
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if (error)
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continue;
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/*
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* Warn user if we already allocated memory for reports and
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* then the size changed (due to firmware update?) and keep
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* old size instead.
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*/
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if (ts->report_data && ts->pkg_size != data_info.pkg_size) {
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dev_warn(&client->dev,
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"report size changes, was: %d, new: %d\n",
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ts->pkg_size, data_info.pkg_size);
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} else {
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ts->pkg_size = data_info.pkg_size;
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ts->report_size = ts->pkg_size - RM_PACKET_CRC_SIZE;
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}
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ts->contact_size = data_info.tp_info_size;
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ts->data_bank_addr = le32_to_cpu(data_info.data_bank_addr);
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dev_dbg(&client->dev,
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"data_bank_addr: %#08x, report_size: %d, contact_size: %d\n",
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ts->data_bank_addr, ts->report_size, ts->contact_size);
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error = raydium_i2c_read(client, RM_CMD_QUERY_BANK,
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&query_bank_addr,
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sizeof(query_bank_addr));
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if (error)
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continue;
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error = raydium_i2c_read_message(client,
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le32_to_cpu(query_bank_addr),
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&ts->info, sizeof(ts->info));
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if (error)
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continue;
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return 0;
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}
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dev_err(&client->dev, "failed to query device parameters: %d\n", error);
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return error;
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}
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static int raydium_i2c_check_fw_status(struct raydium_data *ts)
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{
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struct i2c_client *client = ts->client;
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static const u8 bl_ack = 0x62;
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static const u8 main_ack = 0x66;
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u8 buf[4];
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int error;
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error = raydium_i2c_read(client, RM_CMD_BOOT_READ, buf, sizeof(buf));
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if (!error) {
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if (buf[0] == bl_ack)
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ts->boot_mode = RAYDIUM_TS_BLDR;
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else if (buf[0] == main_ack)
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ts->boot_mode = RAYDIUM_TS_MAIN;
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return 0;
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}
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return error;
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}
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static int raydium_i2c_initialize(struct raydium_data *ts)
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{
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struct i2c_client *client = ts->client;
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int error, retry_cnt;
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for (retry_cnt = 0; retry_cnt < RM_MAX_RETRIES; retry_cnt++) {
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/* Wait for Hello packet */
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msleep(RM_BOOT_DELAY_MS);
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error = raydium_i2c_check_fw_status(ts);
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if (error) {
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dev_err(&client->dev,
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"failed to read 'hello' packet: %d\n", error);
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continue;
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}
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if (ts->boot_mode == RAYDIUM_TS_BLDR ||
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ts->boot_mode == RAYDIUM_TS_MAIN) {
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break;
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}
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}
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if (error)
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ts->boot_mode = RAYDIUM_TS_BLDR;
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if (ts->boot_mode == RAYDIUM_TS_BLDR) {
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ts->info.hw_ver = cpu_to_le32(0xffffffffUL);
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ts->info.main_ver = 0xff;
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ts->info.sub_ver = 0xff;
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} else {
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raydium_i2c_query_ts_info(ts);
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}
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return error;
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}
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static int raydium_i2c_bl_chk_state(struct i2c_client *client,
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enum raydium_bl_ack state)
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{
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static const u8 ack_ok[] = { 0xFF, 0x39, 0x30, 0x30, 0x54 };
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u8 rbuf[sizeof(ack_ok)];
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u8 retry;
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int error;
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for (retry = 0; retry < RM_MAX_FW_RETRIES; retry++) {
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switch (state) {
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case RAYDIUM_ACK_NULL:
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return 0;
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case RAYDIUM_WAIT_READY:
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error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
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&rbuf[0], 1);
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if (!error && rbuf[0] == RM_BOOT_RDY)
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return 0;
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break;
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case RAYDIUM_PATH_READY:
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error = raydium_i2c_read(client, RM_CMD_BOOT_CHK,
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rbuf, sizeof(rbuf));
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if (!error && !memcmp(rbuf, ack_ok, sizeof(ack_ok)))
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return 0;
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break;
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default:
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dev_err(&client->dev, "%s: invalid target state %d\n",
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__func__, state);
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return -EINVAL;
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}
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msleep(20);
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}
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return -ETIMEDOUT;
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}
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static int raydium_i2c_write_object(struct i2c_client *client,
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const void *data, size_t len,
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enum raydium_bl_ack state)
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{
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int error;
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error = raydium_i2c_send(client, RM_CMD_BOOT_WRT, data, len);
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if (error) {
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dev_err(&client->dev, "WRT obj command failed: %d\n",
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error);
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return error;
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}
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error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, NULL, 0);
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if (error) {
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dev_err(&client->dev, "Ack obj command failed: %d\n", error);
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return error;
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}
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error = raydium_i2c_bl_chk_state(client, state);
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if (error) {
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dev_err(&client->dev, "BL check state failed: %d\n", error);
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return error;
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}
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return 0;
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}
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static bool raydium_i2c_boot_trigger(struct i2c_client *client)
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{
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static const u8 cmd[7][6] = {
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{ 0x08, 0x0C, 0x09, 0x00, 0x50, 0xD7 },
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{ 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
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{ 0x08, 0x04, 0x09, 0x00, 0x50, 0x00 },
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{ 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
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{ 0x08, 0x0C, 0x09, 0x00, 0x50, 0x00 },
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{ 0x06, 0x01, 0x00, 0x00, 0x00, 0x00 },
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{ 0x02, 0xA2, 0x00, 0x00, 0x00, 0x00 },
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};
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int i;
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int error;
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for (i = 0; i < 7; i++) {
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error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
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RAYDIUM_WAIT_READY);
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if (error) {
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dev_err(&client->dev,
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"boot trigger failed at step %d: %d\n",
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i, error);
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return error;
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}
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}
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return 0;
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}
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static bool raydium_i2c_fw_trigger(struct i2c_client *client)
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{
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static const u8 cmd[5][11] = {
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{ 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0xD7, 0, 0, 0 },
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{ 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
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{ 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
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{ 0, 0x09, 0x71, 0x04, 0x09, 0x00, 0x50, 0xA5, 0, 0, 0 },
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{ 0, 0x09, 0x71, 0x0C, 0x09, 0x00, 0x50, 0x00, 0, 0, 0 },
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};
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int i;
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int error;
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for (i = 0; i < 5; i++) {
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error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
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RAYDIUM_ACK_NULL);
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if (error) {
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dev_err(&client->dev,
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"fw trigger failed at step %d: %d\n",
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i, error);
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return error;
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}
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}
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return 0;
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}
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|
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static int raydium_i2c_check_path(struct i2c_client *client)
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{
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static const u8 cmd[] = { 0x09, 0x00, 0x09, 0x00, 0x50, 0x10, 0x00 };
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int error;
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error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
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RAYDIUM_PATH_READY);
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if (error) {
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dev_err(&client->dev, "check path command failed: %d\n", error);
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return error;
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}
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return 0;
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}
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|
|
static int raydium_i2c_enter_bl(struct i2c_client *client)
|
|
{
|
|
static const u8 cal_cmd[] = { 0x00, 0x01, 0x52 };
|
|
int error;
|
|
|
|
error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
|
|
RAYDIUM_ACK_NULL);
|
|
if (error) {
|
|
dev_err(&client->dev, "enter bl command failed: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
msleep(RM_BOOT_DELAY_MS);
|
|
return 0;
|
|
}
|
|
|
|
static int raydium_i2c_leave_bl(struct i2c_client *client)
|
|
{
|
|
static const u8 leave_cmd[] = { 0x05, 0x00 };
|
|
int error;
|
|
|
|
error = raydium_i2c_write_object(client, leave_cmd, sizeof(leave_cmd),
|
|
RAYDIUM_ACK_NULL);
|
|
if (error) {
|
|
dev_err(&client->dev, "leave bl command failed: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
msleep(RM_BOOT_DELAY_MS);
|
|
return 0;
|
|
}
|
|
|
|
static int raydium_i2c_write_checksum(struct i2c_client *client,
|
|
size_t length, u16 checksum)
|
|
{
|
|
u8 checksum_cmd[] = { 0x00, 0x05, 0x6D, 0x00, 0x00, 0x00, 0x00 };
|
|
int error;
|
|
|
|
put_unaligned_le16(length, &checksum_cmd[3]);
|
|
put_unaligned_le16(checksum, &checksum_cmd[5]);
|
|
|
|
error = raydium_i2c_write_object(client,
|
|
checksum_cmd, sizeof(checksum_cmd),
|
|
RAYDIUM_ACK_NULL);
|
|
if (error) {
|
|
dev_err(&client->dev, "failed to write checksum: %d\n",
|
|
error);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int raydium_i2c_disable_watch_dog(struct i2c_client *client)
|
|
{
|
|
static const u8 cmd[] = { 0x0A, 0xAA };
|
|
int error;
|
|
|
|
error = raydium_i2c_write_object(client, cmd, sizeof(cmd),
|
|
RAYDIUM_WAIT_READY);
|
|
if (error) {
|
|
dev_err(&client->dev, "disable watchdog command failed: %d\n",
|
|
error);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int raydium_i2c_fw_write_page(struct i2c_client *client,
|
|
u16 page_idx, const void *data, size_t len)
|
|
{
|
|
u8 buf[RM_BL_WRT_LEN];
|
|
size_t xfer_len;
|
|
int error;
|
|
int i;
|
|
|
|
BUILD_BUG_ON((RM_FW_PAGE_SIZE % RM_BL_WRT_PKG_SIZE) != 0);
|
|
|
|
for (i = 0; i < RM_FW_PAGE_SIZE / RM_BL_WRT_PKG_SIZE; i++) {
|
|
buf[BL_HEADER] = RM_CMD_BOOT_PAGE_WRT;
|
|
buf[BL_PAGE_STR] = page_idx ? 0xff : 0;
|
|
buf[BL_PKG_IDX] = i + 1;
|
|
|
|
xfer_len = min_t(size_t, len, RM_BL_WRT_PKG_SIZE);
|
|
memcpy(&buf[BL_DATA_STR], data, xfer_len);
|
|
if (len < RM_BL_WRT_PKG_SIZE)
|
|
memset(&buf[BL_DATA_STR + xfer_len], 0xff,
|
|
RM_BL_WRT_PKG_SIZE - xfer_len);
|
|
|
|
error = raydium_i2c_write_object(client, buf, RM_BL_WRT_LEN,
|
|
RAYDIUM_WAIT_READY);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"page write command failed for page %d, chunk %d: %d\n",
|
|
page_idx, i, error);
|
|
return error;
|
|
}
|
|
|
|
data += xfer_len;
|
|
len -= xfer_len;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static u16 raydium_calc_chksum(const u8 *buf, u16 len)
|
|
{
|
|
u16 checksum = 0;
|
|
u16 i;
|
|
|
|
for (i = 0; i < len; i++)
|
|
checksum += buf[i];
|
|
|
|
return checksum;
|
|
}
|
|
|
|
static int raydium_i2c_do_update_firmware(struct raydium_data *ts,
|
|
const struct firmware *fw)
|
|
{
|
|
struct i2c_client *client = ts->client;
|
|
const void *data;
|
|
size_t data_len;
|
|
size_t len;
|
|
int page_nr;
|
|
int i;
|
|
int error;
|
|
u16 fw_checksum;
|
|
|
|
if (fw->size == 0 || fw->size > RM_MAX_FW_SIZE) {
|
|
dev_err(&client->dev, "Invalid firmware length\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
error = raydium_i2c_check_fw_status(ts);
|
|
if (error) {
|
|
dev_err(&client->dev, "Unable to access IC %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
if (ts->boot_mode == RAYDIUM_TS_MAIN) {
|
|
for (i = 0; i < RM_MAX_RETRIES; i++) {
|
|
error = raydium_i2c_enter_bl(client);
|
|
if (!error) {
|
|
error = raydium_i2c_check_fw_status(ts);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"unable to access IC: %d\n",
|
|
error);
|
|
return error;
|
|
}
|
|
|
|
if (ts->boot_mode == RAYDIUM_TS_BLDR)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ts->boot_mode == RAYDIUM_TS_MAIN) {
|
|
dev_err(&client->dev,
|
|
"failed to jump to boot loader: %d\n",
|
|
error);
|
|
return -EIO;
|
|
}
|
|
}
|
|
|
|
error = raydium_i2c_disable_watch_dog(client);
|
|
if (error)
|
|
return error;
|
|
|
|
error = raydium_i2c_check_path(client);
|
|
if (error)
|
|
return error;
|
|
|
|
error = raydium_i2c_boot_trigger(client);
|
|
if (error) {
|
|
dev_err(&client->dev, "send boot trigger fail: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
msleep(RM_BOOT_DELAY_MS);
|
|
|
|
data = fw->data;
|
|
data_len = fw->size;
|
|
page_nr = 0;
|
|
|
|
while (data_len) {
|
|
len = min_t(size_t, data_len, RM_FW_PAGE_SIZE);
|
|
|
|
error = raydium_i2c_fw_write_page(client, page_nr++, data, len);
|
|
if (error)
|
|
return error;
|
|
|
|
msleep(20);
|
|
|
|
data += len;
|
|
data_len -= len;
|
|
}
|
|
|
|
error = raydium_i2c_leave_bl(client);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"failed to leave boot loader: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
dev_dbg(&client->dev, "left boot loader mode\n");
|
|
msleep(RM_BOOT_DELAY_MS);
|
|
|
|
error = raydium_i2c_check_fw_status(ts);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"failed to check fw status after write: %d\n",
|
|
error);
|
|
return error;
|
|
}
|
|
|
|
if (ts->boot_mode != RAYDIUM_TS_MAIN) {
|
|
dev_err(&client->dev,
|
|
"failed to switch to main fw after writing firmware: %d\n",
|
|
error);
|
|
return -EINVAL;
|
|
}
|
|
|
|
error = raydium_i2c_fw_trigger(client);
|
|
if (error) {
|
|
dev_err(&client->dev, "failed to trigger fw: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
fw_checksum = raydium_calc_chksum(fw->data, fw->size);
|
|
|
|
error = raydium_i2c_write_checksum(client, fw->size, fw_checksum);
|
|
if (error)
|
|
return error;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int raydium_i2c_fw_update(struct raydium_data *ts)
|
|
{
|
|
struct i2c_client *client = ts->client;
|
|
const struct firmware *fw = NULL;
|
|
const char *fw_file = "raydium.fw";
|
|
int error;
|
|
|
|
error = request_firmware(&fw, fw_file, &client->dev);
|
|
if (error) {
|
|
dev_err(&client->dev, "Unable to open firmware %s\n", fw_file);
|
|
return error;
|
|
}
|
|
|
|
disable_irq(client->irq);
|
|
|
|
error = raydium_i2c_do_update_firmware(ts, fw);
|
|
if (error) {
|
|
dev_err(&client->dev, "firmware update failed: %d\n", error);
|
|
ts->boot_mode = RAYDIUM_TS_BLDR;
|
|
goto out_enable_irq;
|
|
}
|
|
|
|
error = raydium_i2c_initialize(ts);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"failed to initialize device after firmware update: %d\n",
|
|
error);
|
|
ts->boot_mode = RAYDIUM_TS_BLDR;
|
|
goto out_enable_irq;
|
|
}
|
|
|
|
ts->boot_mode = RAYDIUM_TS_MAIN;
|
|
|
|
out_enable_irq:
|
|
enable_irq(client->irq);
|
|
msleep(100);
|
|
|
|
release_firmware(fw);
|
|
|
|
return error;
|
|
}
|
|
|
|
static void raydium_mt_event(struct raydium_data *ts)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ts->report_size / ts->contact_size; i++) {
|
|
u8 *contact = &ts->report_data[ts->contact_size * i];
|
|
bool state = contact[RM_CONTACT_STATE_POS];
|
|
u8 wx, wy;
|
|
|
|
input_mt_slot(ts->input, i);
|
|
input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, state);
|
|
|
|
if (!state)
|
|
continue;
|
|
|
|
input_report_abs(ts->input, ABS_MT_POSITION_X,
|
|
get_unaligned_le16(&contact[RM_CONTACT_X_POS]));
|
|
input_report_abs(ts->input, ABS_MT_POSITION_Y,
|
|
get_unaligned_le16(&contact[RM_CONTACT_Y_POS]));
|
|
input_report_abs(ts->input, ABS_MT_PRESSURE,
|
|
contact[RM_CONTACT_PRESSURE_POS]);
|
|
|
|
wx = contact[RM_CONTACT_WIDTH_X_POS];
|
|
wy = contact[RM_CONTACT_WIDTH_Y_POS];
|
|
|
|
input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, max(wx, wy));
|
|
input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, min(wx, wy));
|
|
}
|
|
|
|
input_mt_sync_frame(ts->input);
|
|
input_sync(ts->input);
|
|
}
|
|
|
|
static irqreturn_t raydium_i2c_irq(int irq, void *_dev)
|
|
{
|
|
struct raydium_data *ts = _dev;
|
|
int error;
|
|
u16 fw_crc;
|
|
u16 calc_crc;
|
|
|
|
if (ts->boot_mode != RAYDIUM_TS_MAIN)
|
|
goto out;
|
|
|
|
error = raydium_i2c_read_message(ts->client, ts->data_bank_addr,
|
|
ts->report_data, ts->pkg_size);
|
|
if (error)
|
|
goto out;
|
|
|
|
fw_crc = get_unaligned_le16(&ts->report_data[ts->report_size]);
|
|
calc_crc = raydium_calc_chksum(ts->report_data, ts->report_size);
|
|
if (unlikely(fw_crc != calc_crc)) {
|
|
dev_warn(&ts->client->dev,
|
|
"%s: invalid packet crc %#04x vs %#04x\n",
|
|
__func__, calc_crc, fw_crc);
|
|
goto out;
|
|
}
|
|
|
|
raydium_mt_event(ts);
|
|
|
|
out:
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static ssize_t raydium_i2c_fw_ver_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct raydium_data *ts = i2c_get_clientdata(client);
|
|
|
|
return sprintf(buf, "%d.%d\n", ts->info.main_ver, ts->info.sub_ver);
|
|
}
|
|
|
|
static ssize_t raydium_i2c_hw_ver_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct raydium_data *ts = i2c_get_clientdata(client);
|
|
|
|
return sprintf(buf, "%#04x\n", le32_to_cpu(ts->info.hw_ver));
|
|
}
|
|
|
|
static ssize_t raydium_i2c_boot_mode_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct raydium_data *ts = i2c_get_clientdata(client);
|
|
|
|
return sprintf(buf, "%s\n",
|
|
ts->boot_mode == RAYDIUM_TS_MAIN ?
|
|
"Normal" : "Recovery");
|
|
}
|
|
|
|
static ssize_t raydium_i2c_update_fw_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct raydium_data *ts = i2c_get_clientdata(client);
|
|
int error;
|
|
|
|
error = mutex_lock_interruptible(&ts->sysfs_mutex);
|
|
if (error)
|
|
return error;
|
|
|
|
error = raydium_i2c_fw_update(ts);
|
|
|
|
mutex_unlock(&ts->sysfs_mutex);
|
|
|
|
return error ?: count;
|
|
}
|
|
|
|
static ssize_t raydium_i2c_calibrate_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct raydium_data *ts = i2c_get_clientdata(client);
|
|
static const u8 cal_cmd[] = { 0x00, 0x01, 0x9E };
|
|
int error;
|
|
|
|
error = mutex_lock_interruptible(&ts->sysfs_mutex);
|
|
if (error)
|
|
return error;
|
|
|
|
error = raydium_i2c_write_object(client, cal_cmd, sizeof(cal_cmd),
|
|
RAYDIUM_WAIT_READY);
|
|
if (error)
|
|
dev_err(&client->dev, "calibrate command failed: %d\n", error);
|
|
|
|
mutex_unlock(&ts->sysfs_mutex);
|
|
return error ?: count;
|
|
}
|
|
|
|
static DEVICE_ATTR(fw_version, S_IRUGO, raydium_i2c_fw_ver_show, NULL);
|
|
static DEVICE_ATTR(hw_version, S_IRUGO, raydium_i2c_hw_ver_show, NULL);
|
|
static DEVICE_ATTR(boot_mode, S_IRUGO, raydium_i2c_boot_mode_show, NULL);
|
|
static DEVICE_ATTR(update_fw, S_IWUSR, NULL, raydium_i2c_update_fw_store);
|
|
static DEVICE_ATTR(calibrate, S_IWUSR, NULL, raydium_i2c_calibrate_store);
|
|
|
|
static struct attribute *raydium_i2c_attributes[] = {
|
|
&dev_attr_update_fw.attr,
|
|
&dev_attr_boot_mode.attr,
|
|
&dev_attr_fw_version.attr,
|
|
&dev_attr_hw_version.attr,
|
|
&dev_attr_calibrate.attr,
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group raydium_i2c_attribute_group = {
|
|
.attrs = raydium_i2c_attributes,
|
|
};
|
|
|
|
static void raydium_i2c_remove_sysfs_group(void *_data)
|
|
{
|
|
struct raydium_data *ts = _data;
|
|
|
|
sysfs_remove_group(&ts->client->dev.kobj, &raydium_i2c_attribute_group);
|
|
}
|
|
|
|
static int raydium_i2c_power_on(struct raydium_data *ts)
|
|
{
|
|
int error;
|
|
|
|
if (!ts->reset_gpio)
|
|
return 0;
|
|
|
|
gpiod_set_value_cansleep(ts->reset_gpio, 1);
|
|
|
|
error = regulator_enable(ts->avdd);
|
|
if (error) {
|
|
dev_err(&ts->client->dev,
|
|
"failed to enable avdd regulator: %d\n", error);
|
|
goto release_reset_gpio;
|
|
}
|
|
|
|
error = regulator_enable(ts->vccio);
|
|
if (error) {
|
|
regulator_disable(ts->avdd);
|
|
dev_err(&ts->client->dev,
|
|
"failed to enable vccio regulator: %d\n", error);
|
|
goto release_reset_gpio;
|
|
}
|
|
|
|
udelay(RM_POWERON_DELAY_USEC);
|
|
|
|
release_reset_gpio:
|
|
gpiod_set_value_cansleep(ts->reset_gpio, 0);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
msleep(RM_RESET_DELAY_MSEC);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void raydium_i2c_power_off(void *_data)
|
|
{
|
|
struct raydium_data *ts = _data;
|
|
|
|
if (ts->reset_gpio) {
|
|
gpiod_set_value_cansleep(ts->reset_gpio, 1);
|
|
regulator_disable(ts->vccio);
|
|
regulator_disable(ts->avdd);
|
|
}
|
|
}
|
|
|
|
static int raydium_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
union i2c_smbus_data dummy;
|
|
struct raydium_data *ts;
|
|
int error;
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
|
|
dev_err(&client->dev,
|
|
"i2c check functionality error (need I2C_FUNC_I2C)\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
|
|
if (!ts)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&ts->sysfs_mutex);
|
|
|
|
ts->client = client;
|
|
i2c_set_clientdata(client, ts);
|
|
|
|
ts->avdd = devm_regulator_get(&client->dev, "avdd");
|
|
if (IS_ERR(ts->avdd)) {
|
|
error = PTR_ERR(ts->avdd);
|
|
if (error != -EPROBE_DEFER)
|
|
dev_err(&client->dev,
|
|
"Failed to get 'avdd' regulator: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
ts->vccio = devm_regulator_get(&client->dev, "vccio");
|
|
if (IS_ERR(ts->vccio)) {
|
|
error = PTR_ERR(ts->vccio);
|
|
if (error != -EPROBE_DEFER)
|
|
dev_err(&client->dev,
|
|
"Failed to get 'vccio' regulator: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
|
|
GPIOD_OUT_LOW);
|
|
if (IS_ERR(ts->reset_gpio)) {
|
|
error = PTR_ERR(ts->reset_gpio);
|
|
if (error != -EPROBE_DEFER)
|
|
dev_err(&client->dev,
|
|
"failed to get reset gpio: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
error = raydium_i2c_power_on(ts);
|
|
if (error)
|
|
return error;
|
|
|
|
error = devm_add_action(&client->dev, raydium_i2c_power_off, ts);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"failed to install power off action: %d\n", error);
|
|
raydium_i2c_power_off(ts);
|
|
return error;
|
|
}
|
|
|
|
/* Make sure there is something at this address */
|
|
if (i2c_smbus_xfer(client->adapter, client->addr, 0,
|
|
I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0) {
|
|
dev_err(&client->dev, "nothing at this address\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
error = raydium_i2c_initialize(ts);
|
|
if (error) {
|
|
dev_err(&client->dev, "failed to initialize: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
ts->report_data = devm_kmalloc(&client->dev,
|
|
ts->pkg_size, GFP_KERNEL);
|
|
if (!ts->report_data)
|
|
return -ENOMEM;
|
|
|
|
ts->input = devm_input_allocate_device(&client->dev);
|
|
if (!ts->input) {
|
|
dev_err(&client->dev, "Failed to allocate input device\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ts->input->name = "Raydium Touchscreen";
|
|
ts->input->id.bustype = BUS_I2C;
|
|
|
|
input_set_abs_params(ts->input, ABS_MT_POSITION_X,
|
|
0, le16_to_cpu(ts->info.x_max), 0, 0);
|
|
input_set_abs_params(ts->input, ABS_MT_POSITION_Y,
|
|
0, le16_to_cpu(ts->info.y_max), 0, 0);
|
|
input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->info.x_res);
|
|
input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->info.y_res);
|
|
|
|
input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
|
|
input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0);
|
|
|
|
error = input_mt_init_slots(ts->input, RM_MAX_TOUCH_NUM,
|
|
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"failed to initialize MT slots: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
error = input_register_device(ts->input);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"unable to register input device: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
error = devm_request_threaded_irq(&client->dev, client->irq,
|
|
NULL, raydium_i2c_irq,
|
|
IRQF_ONESHOT, client->name, ts);
|
|
if (error) {
|
|
dev_err(&client->dev, "Failed to register interrupt\n");
|
|
return error;
|
|
}
|
|
|
|
error = sysfs_create_group(&client->dev.kobj,
|
|
&raydium_i2c_attribute_group);
|
|
if (error) {
|
|
dev_err(&client->dev, "failed to create sysfs attributes: %d\n",
|
|
error);
|
|
return error;
|
|
}
|
|
|
|
error = devm_add_action(&client->dev,
|
|
raydium_i2c_remove_sysfs_group, ts);
|
|
if (error) {
|
|
raydium_i2c_remove_sysfs_group(ts);
|
|
dev_err(&client->dev,
|
|
"Failed to add sysfs cleanup action: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __maybe_unused raydium_enter_sleep(struct i2c_client *client)
|
|
{
|
|
static const u8 sleep_cmd[] = { 0x5A, 0xff, 0x00, 0x0f };
|
|
int error;
|
|
|
|
error = raydium_i2c_send(client, RM_CMD_ENTER_SLEEP,
|
|
sleep_cmd, sizeof(sleep_cmd));
|
|
if (error)
|
|
dev_err(&client->dev,
|
|
"sleep command failed: %d\n", error);
|
|
}
|
|
|
|
static int __maybe_unused raydium_i2c_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct raydium_data *ts = i2c_get_clientdata(client);
|
|
|
|
/* Sleep is not available in BLDR recovery mode */
|
|
if (ts->boot_mode != RAYDIUM_TS_MAIN)
|
|
return -EBUSY;
|
|
|
|
disable_irq(client->irq);
|
|
|
|
if (device_may_wakeup(dev)) {
|
|
raydium_enter_sleep(client);
|
|
|
|
ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0);
|
|
} else {
|
|
raydium_i2c_power_off(ts);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused raydium_i2c_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct raydium_data *ts = i2c_get_clientdata(client);
|
|
|
|
if (device_may_wakeup(dev)) {
|
|
if (ts->wake_irq_enabled)
|
|
disable_irq_wake(client->irq);
|
|
raydium_i2c_sw_reset(client);
|
|
} else {
|
|
raydium_i2c_power_on(ts);
|
|
raydium_i2c_initialize(ts);
|
|
}
|
|
|
|
enable_irq(client->irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops,
|
|
raydium_i2c_suspend, raydium_i2c_resume);
|
|
|
|
static const struct i2c_device_id raydium_i2c_id[] = {
|
|
{ "raydium_i2c" , 0 },
|
|
{ "rm32380", 0 },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, raydium_i2c_id);
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static const struct acpi_device_id raydium_acpi_id[] = {
|
|
{ "RAYD0001", 0 },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, raydium_acpi_id);
|
|
#endif
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id raydium_of_match[] = {
|
|
{ .compatible = "raydium,rm32380", },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, raydium_of_match);
|
|
#endif
|
|
|
|
static struct i2c_driver raydium_i2c_driver = {
|
|
.probe = raydium_i2c_probe,
|
|
.id_table = raydium_i2c_id,
|
|
.driver = {
|
|
.name = "raydium_ts",
|
|
.pm = &raydium_i2c_pm_ops,
|
|
.acpi_match_table = ACPI_PTR(raydium_acpi_id),
|
|
.of_match_table = of_match_ptr(raydium_of_match),
|
|
},
|
|
};
|
|
module_i2c_driver(raydium_i2c_driver);
|
|
|
|
MODULE_AUTHOR("Raydium");
|
|
MODULE_DESCRIPTION("Raydium I2c Touchscreen driver");
|
|
MODULE_LICENSE("GPL v2");
|