/*
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* System Control and Power Interface (SCPI) Message Protocol driver
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*
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* Copyright (C) 2014 ARM Ltd.
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* Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
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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 and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <linux/export.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/printk.h>
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#include <linux/mailbox_client.h>
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#include <linux/slab.h>
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#include <soc/rockchip/scpi.h>
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#include <soc/rockchip/rk3368-mailbox.h>
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|
#define SCPI_VERSION 0x01000002 /* version: 1.0.0.2 */
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#define CMD_ID_SHIFT 0
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#define CMD_ID_MASK 0xff
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#define CMD_SENDER_ID_SHIFT 8
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#define CMD_SENDER_ID_MASK 0xff
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#define CMD_DATA_SIZE_SHIFT 20
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#define CMD_DATA_SIZE_MASK 0x1ff
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#define PACK_SCPI_CMD(cmd, sender, txsz) \
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((((cmd) & CMD_ID_MASK) << CMD_ID_SHIFT) | \
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(((sender) & CMD_SENDER_ID_MASK) << CMD_SENDER_ID_SHIFT) | \
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(((txsz) & CMD_DATA_SIZE_MASK) << CMD_DATA_SIZE_SHIFT))
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#define SCPI_CMD_DEFAULT_TIMEOUT_MS 1000
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#define MAX_DVFS_DOMAINS 3
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#define MAX_DVFS_OPPS 8
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#define DVFS_LATENCY(hdr) ((hdr) >> 16)
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#define DVFS_OPP_COUNT(hdr) (((hdr) >> 8) & 0xff)
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|
static int max_chan_num = 0;
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static DECLARE_BITMAP(bm_mbox_chans, 4);
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static DEFINE_MUTEX(scpi_mtx);
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|
enum scpi_error_codes {
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SCPI_SUCCESS = 0, /* Success */
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SCPI_ERR_PARAM = 1, /* Invalid parameter(s) */
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SCPI_ERR_ALIGN = 2, /* Invalid alignment */
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SCPI_ERR_SIZE = 3, /* Invalid size */
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SCPI_ERR_HANDLER = 4, /* Invalid handler/callback */
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SCPI_ERR_ACCESS = 5, /* Invalid access/permission denied */
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SCPI_ERR_RANGE = 6, /* Value out of range */
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SCPI_ERR_TIMEOUT = 7, /* Timeout has occurred */
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SCPI_ERR_NOMEM = 8, /* Invalid memory area or pointer */
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SCPI_ERR_PWRSTATE = 9, /* Invalid power state */
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SCPI_ERR_SUPPORT = 10, /* Not supported or disabled */
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SCPI_ERR_DEVICE = 11, /* Device error */
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SCPI_ERR_MAX
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};
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|
enum scpi_client_id {
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SCPI_CL_NONE,
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SCPI_CL_CLOCKS,
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SCPI_CL_DVFS,
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SCPI_CL_POWER,
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SCPI_CL_THERMAL,
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SCPI_CL_DDR,
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SCPI_CL_SYS,
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SCPI_MAX,
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};
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|
enum scpi_ddr_cmd {
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SCPI_DDR_INIT,
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SCPI_DDR_SET_FREQ,
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SCPI_DDR_ROUND_RATE,
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SCPI_DDR_AUTO_SELF_REFRESH,
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SCPI_DDR_BANDWIDTH_GET,
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SCPI_DDR_GET_FREQ,
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SCPI_DDR_SEND_TIMING,
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SCPI_DDR_DCLK_MODE,
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};
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enum scpi_sys_cmd {
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SCPI_SYS_GET_VERSION,
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SCPI_SYS_REFRESH_MCU_FREQ,
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SCPI_SYS_SET_MCU_STATE_SUSPEND,
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SCPI_SYS_SET_MCU_STATE_RESUME,
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SCPI_SYS_SET_JTAGMUX_ON_OFF,
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};
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enum scpi_std_cmd {
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SCPI_CMD_INVALID = 0x00,
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SCPI_CMD_SCPI_READY = 0x01,
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SCPI_CMD_SCPI_CAPABILITIES = 0x02,
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SCPI_CMD_EVENT = 0x03,
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SCPI_CMD_SET_CSS_PWR_STATE = 0x04,
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SCPI_CMD_GET_CSS_PWR_STATE = 0x05,
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SCPI_CMD_CFG_PWR_STATE_STAT = 0x06,
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SCPI_CMD_GET_PWR_STATE_STAT = 0x07,
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SCPI_CMD_SYS_PWR_STATE = 0x08,
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SCPI_CMD_L2_READY = 0x09,
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SCPI_CMD_SET_AP_TIMER = 0x0a,
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SCPI_CMD_CANCEL_AP_TIME = 0x0b,
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SCPI_CMD_DVFS_CAPABILITIES = 0x0c,
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SCPI_CMD_GET_DVFS_INFO = 0x0d,
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SCPI_CMD_SET_DVFS = 0x0e,
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SCPI_CMD_GET_DVFS = 0x0f,
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SCPI_CMD_GET_DVFS_STAT = 0x10,
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SCPI_CMD_SET_RTC = 0x11,
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SCPI_CMD_GET_RTC = 0x12,
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SCPI_CMD_CLOCK_CAPABILITIES = 0x13,
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SCPI_CMD_SET_CLOCK_INDEX = 0x14,
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SCPI_CMD_SET_CLOCK_VALUE = 0x15,
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SCPI_CMD_GET_CLOCK_VALUE = 0x16,
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SCPI_CMD_PSU_CAPABILITIES = 0x17,
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SCPI_CMD_SET_PSU = 0x18,
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SCPI_CMD_GET_PSU = 0x19,
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SCPI_CMD_SENSOR_CAPABILITIES = 0x1a,
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SCPI_CMD_SENSOR_INFO = 0x1b,
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SCPI_CMD_SENSOR_VALUE = 0x1c,
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SCPI_CMD_SENSOR_CFG_PERIODIC = 0x1d,
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SCPI_CMD_SENSOR_CFG_BOUNDS = 0x1e,
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SCPI_CMD_SENSOR_ASYNC_VALUE = 0x1f,
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SCPI_CMD_COUNT
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};
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enum scpi_thermal_cmd {
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SCPI_THERMAL_GET_TSADC_DATA,
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SCPI_THERMAL_SET_TSADC_CYCLE,
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SCPI_THERMAL_COUNT
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};
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static int high_priority_cmds[] = {
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SCPI_CMD_GET_CSS_PWR_STATE,
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SCPI_CMD_CFG_PWR_STATE_STAT,
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SCPI_CMD_GET_PWR_STATE_STAT,
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SCPI_CMD_SET_DVFS,
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SCPI_CMD_GET_DVFS,
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SCPI_CMD_SET_RTC,
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SCPI_CMD_GET_RTC,
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SCPI_CMD_SET_CLOCK_INDEX,
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SCPI_CMD_SET_CLOCK_VALUE,
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SCPI_CMD_GET_CLOCK_VALUE,
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SCPI_CMD_SET_PSU,
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SCPI_CMD_GET_PSU,
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SCPI_CMD_SENSOR_CFG_PERIODIC,
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SCPI_CMD_SENSOR_CFG_BOUNDS,
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};
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struct scpi_data_buf {
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int client_id;
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struct rk3368_mbox_msg *data;
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struct completion complete;
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int timeout_ms;
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};
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struct scpi_mcu_ver {
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u32 scpi_ver;
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char mcu_ver[16];
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};
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static struct scpi_opp *scpi_opps[MAX_DVFS_DOMAINS];
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static struct device *the_scpi_device;
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static int scpi_linux_errmap[SCPI_ERR_MAX] = {
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0, -EINVAL, -ENOEXEC, -EMSGSIZE,
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-EINVAL, -EACCES, -ERANGE, -ETIMEDOUT,
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-ENOMEM, -EINVAL, -EOPNOTSUPP, -EIO,
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};
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static inline int scpi_to_linux_errno(int errno)
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{
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if (errno >= SCPI_SUCCESS && errno < SCPI_ERR_MAX)
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return scpi_linux_errmap[errno];
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return -EIO;
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}
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static bool __maybe_unused high_priority_chan_supported(int cmd)
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{
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int idx;
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for (idx = 0; idx < ARRAY_SIZE(high_priority_cmds); idx++)
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if (cmd == high_priority_cmds[idx])
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return true;
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return false;
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}
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static int scpi_alloc_mbox_chan(void)
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{
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int index;
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mutex_lock(&scpi_mtx);
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index = find_first_zero_bit(bm_mbox_chans, max_chan_num);
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if (index >= max_chan_num) {
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pr_err("alloc mailbox channel failed\n");
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mutex_unlock(&scpi_mtx);
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return -EBUSY;
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}
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set_bit(index, bm_mbox_chans);
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mutex_unlock(&scpi_mtx);
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return index;
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}
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static void scpi_free_mbox_chan(int chan)
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{
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int index = chan;
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mutex_lock(&scpi_mtx);
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if (index < max_chan_num && index >= 0)
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clear_bit(index, bm_mbox_chans);
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mutex_unlock(&scpi_mtx);
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}
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static void scpi_rx_callback(struct mbox_client *cl, void *msg)
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{
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struct rk3368_mbox_msg *data = (struct rk3368_mbox_msg *)msg;
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struct scpi_data_buf *scpi_buf = data->cl_data;
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complete(&scpi_buf->complete);
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}
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static int send_scpi_cmd(struct scpi_data_buf *scpi_buf, int index)
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{
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struct mbox_chan *chan;
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struct mbox_client cl;
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struct rk3368_mbox_msg *data = scpi_buf->data;
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u32 status;
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int ret;
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int timeout = msecs_to_jiffies(scpi_buf->timeout_ms);
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if (!the_scpi_device) {
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pr_err("Scpi initializes unsuccessfully\n");
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return -EIO;
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}
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cl.dev = the_scpi_device;
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cl.rx_callback = scpi_rx_callback;
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cl.tx_done = NULL;
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cl.tx_prepare = NULL;
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cl.tx_block = false;
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cl.knows_txdone = false;
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chan = mbox_request_channel(&cl, index);
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if (IS_ERR(chan)) {
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scpi_free_mbox_chan(index);
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return PTR_ERR(chan);
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}
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init_completion(&scpi_buf->complete);
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if (mbox_send_message(chan, (void *)data) < 0) {
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status = SCPI_ERR_TIMEOUT;
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goto free_channel;
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}
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ret = wait_for_completion_timeout(&scpi_buf->complete, timeout);
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if (ret == 0) {
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status = SCPI_ERR_TIMEOUT;
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goto free_channel;
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}
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status = *(u32 *)(data->rx_buf); /* read first word */
|
|
free_channel:
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mbox_free_channel(chan);
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scpi_free_mbox_chan(index);
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return scpi_to_linux_errno(status);
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}
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#define SCPI_SETUP_DBUF(scpi_buf, mbox_buf, _client_id,\
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_cmd, _tx_buf, _rx_buf) \
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do { \
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struct rk3368_mbox_msg *pdata = &mbox_buf; \
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pdata->cmd = _cmd; \
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pdata->tx_buf = &_tx_buf; \
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pdata->tx_size = sizeof(_tx_buf); \
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pdata->rx_buf = &_rx_buf; \
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pdata->rx_size = sizeof(_rx_buf); \
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scpi_buf.client_id = _client_id; \
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scpi_buf.data = pdata; \
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scpi_buf.timeout_ms = SCPI_CMD_DEFAULT_TIMEOUT_MS; \
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} while (0)
|
|
#define SCPI_SETUP_DBUF_BY_SIZE(scpi_buf, mbox_buf, _client_id, \
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_cmd, _tx_buf, _tx_size, _rx_buf) \
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do { \
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struct rk3368_mbox_msg *pdata = &mbox_buf; \
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pdata->cmd = _cmd; \
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pdata->tx_buf = _tx_buf; \
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pdata->tx_size = _tx_size; \
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pdata->rx_buf = &_rx_buf; \
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pdata->rx_size = sizeof(_rx_buf); \
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scpi_buf.client_id = _client_id; \
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scpi_buf.data = pdata; \
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scpi_buf.timeout_ms = SCPI_CMD_DEFAULT_TIMEOUT_MS; \
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} while (0)
|
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static int scpi_execute_cmd(struct scpi_data_buf *scpi_buf)
|
{
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struct rk3368_mbox_msg *data;
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int index;
|
|
if (!scpi_buf || !scpi_buf->data)
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return -EINVAL;
|
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index = scpi_alloc_mbox_chan();
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if (index < 0)
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return -EBUSY;
|
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data = scpi_buf->data;
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data->cmd = PACK_SCPI_CMD(data->cmd, scpi_buf->client_id,
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data->tx_size);
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data->cl_data = scpi_buf;
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return send_scpi_cmd(scpi_buf, index);
|
}
|
|
unsigned long scpi_clk_get_val(u16 clk_id)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
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struct __packed {
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u32 status;
|
u32 clk_rate;
|
} buf;
|
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_CLOCKS,
|
SCPI_CMD_GET_CLOCK_VALUE, clk_id, buf);
|
if (scpi_execute_cmd(&sdata))
|
return 0;
|
|
return buf.clk_rate;
|
}
|
EXPORT_SYMBOL_GPL(scpi_clk_get_val);
|
|
int scpi_clk_set_val(u16 clk_id, unsigned long rate)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
int stat;
|
struct __packed {
|
u32 clk_rate;
|
u16 clk_id;
|
} buf;
|
|
buf.clk_rate = (u32)rate;
|
buf.clk_id = clk_id;
|
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_CLOCKS,
|
SCPI_CMD_SET_CLOCK_VALUE, buf, stat);
|
return scpi_execute_cmd(&sdata);
|
}
|
EXPORT_SYMBOL_GPL(scpi_clk_set_val);
|
|
struct scpi_opp *scpi_dvfs_get_opps(u8 domain)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed {
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u32 status;
|
u32 header;
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struct scpi_opp_entry opp[MAX_DVFS_OPPS];
|
} buf;
|
struct scpi_opp *opps;
|
size_t opps_sz;
|
int count, ret;
|
|
if (domain >= MAX_DVFS_DOMAINS)
|
return ERR_PTR(-EINVAL);
|
|
if (scpi_opps[domain]) /* data already populated */
|
return scpi_opps[domain];
|
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_DVFS,
|
SCPI_CMD_GET_DVFS_INFO, domain, buf);
|
ret = scpi_execute_cmd(&sdata);
|
if (ret)
|
return ERR_PTR(ret);
|
|
opps = kmalloc(sizeof(*opps), GFP_KERNEL);
|
if (!opps)
|
return ERR_PTR(-ENOMEM);
|
|
count = DVFS_OPP_COUNT(buf.header);
|
opps_sz = count * sizeof(*(opps->opp));
|
|
opps->count = count;
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opps->latency = DVFS_LATENCY(buf.header);
|
opps->opp = kmalloc(opps_sz, GFP_KERNEL);
|
if (!opps->opp) {
|
kfree(opps);
|
return ERR_PTR(-ENOMEM);
|
}
|
|
memcpy(opps->opp, &buf.opp[0], opps_sz);
|
scpi_opps[domain] = opps;
|
|
return opps;
|
}
|
EXPORT_SYMBOL_GPL(scpi_dvfs_get_opps);
|
|
int scpi_dvfs_get_idx(u8 domain)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed {
|
u32 status;
|
u8 dvfs_idx;
|
} buf;
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int ret;
|
|
if (domain >= MAX_DVFS_DOMAINS)
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return -EINVAL;
|
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_DVFS,
|
SCPI_CMD_GET_DVFS, domain, buf);
|
ret = scpi_execute_cmd(&sdata);
|
|
if (!ret)
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ret = buf.dvfs_idx;
|
return ret;
|
}
|
EXPORT_SYMBOL_GPL(scpi_dvfs_get_idx);
|
|
int scpi_dvfs_set_idx(u8 domain, u8 idx)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed {
|
u8 dvfs_domain;
|
u8 dvfs_idx;
|
} buf;
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int stat;
|
|
buf.dvfs_idx = idx;
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buf.dvfs_domain = domain;
|
|
if (domain >= MAX_DVFS_DOMAINS)
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return -EINVAL;
|
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_DVFS,
|
SCPI_CMD_SET_DVFS, buf, stat);
|
return scpi_execute_cmd(&sdata);
|
}
|
EXPORT_SYMBOL_GPL(scpi_dvfs_set_idx);
|
|
int scpi_get_sensor(char *name)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed {
|
u32 status;
|
u16 sensors;
|
} cap_buf;
|
struct __packed {
|
u32 status;
|
u16 sensor;
|
u8 class;
|
u8 trigger;
|
char name[20];
|
} info_buf;
|
int ret;
|
u16 sensor_id;
|
|
/* This should be handled by a generic macro */
|
do {
|
struct rk3368_mbox_msg *pdata = &mdata;
|
|
pdata->cmd = SCPI_CMD_SENSOR_CAPABILITIES;
|
pdata->tx_size = 0;
|
pdata->rx_buf = &cap_buf;
|
pdata->rx_size = sizeof(cap_buf);
|
sdata.client_id = SCPI_CL_THERMAL;
|
sdata.data = pdata;
|
} while (0);
|
|
ret = scpi_execute_cmd(&sdata);
|
if (ret)
|
goto out;
|
|
ret = -ENODEV;
|
for (sensor_id = 0; sensor_id < cap_buf.sensors; sensor_id++) {
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_THERMAL,
|
SCPI_CMD_SENSOR_INFO, sensor_id, info_buf);
|
ret = scpi_execute_cmd(&sdata);
|
if (ret)
|
break;
|
|
if (!strcmp(name, info_buf.name)) {
|
ret = sensor_id;
|
break;
|
}
|
}
|
out:
|
return ret;
|
}
|
EXPORT_SYMBOL_GPL(scpi_get_sensor);
|
|
int scpi_get_sensor_value(u16 sensor, u32 *val)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed {
|
u32 status;
|
u32 val;
|
} buf;
|
int ret;
|
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_THERMAL, SCPI_CMD_SENSOR_VALUE,
|
sensor, buf);
|
|
ret = scpi_execute_cmd(&sdata);
|
if (ret)
|
*val = buf.val;
|
|
return ret;
|
}
|
EXPORT_SYMBOL_GPL(scpi_get_sensor_value);
|
|
static int scpi_get_version(u32 old, struct scpi_mcu_ver *ver)
|
{
|
int ret;
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed {
|
u32 status;
|
struct scpi_mcu_ver version;
|
} buf;
|
|
memset(&buf, 0, sizeof(buf));
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_SYS, SCPI_SYS_GET_VERSION,
|
old, buf);
|
|
ret = scpi_execute_cmd(&sdata);
|
if (ret) {
|
pr_err("get scpi version from MCU failed, ret=%d\n", ret);
|
goto OUT;
|
}
|
|
memcpy(ver, &(buf.version), sizeof(*ver));
|
|
OUT:
|
return ret;
|
}
|
|
int scpi_sys_set_mcu_state_suspend(void)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed1 {
|
u32 status;
|
} tx_buf;
|
struct __packed2 {
|
u32 status;
|
} rx_buf;
|
|
tx_buf.status = 0;
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_SYS,
|
SCPI_SYS_SET_MCU_STATE_SUSPEND, tx_buf, rx_buf);
|
return scpi_execute_cmd(&sdata);
|
}
|
EXPORT_SYMBOL_GPL(scpi_sys_set_mcu_state_suspend);
|
|
int scpi_sys_set_mcu_state_resume(void)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed1 {
|
u32 status;
|
} tx_buf;
|
struct __packed2 {
|
u32 status;
|
} rx_buf;
|
|
tx_buf.status = 0;
|
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_SYS,
|
SCPI_SYS_SET_MCU_STATE_RESUME, tx_buf, rx_buf);
|
return scpi_execute_cmd(&sdata);
|
}
|
EXPORT_SYMBOL_GPL(scpi_sys_set_mcu_state_resume);
|
|
int scpi_sys_set_jtagmux_on_off(u32 en)
|
{
|
int ret;
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed1 {
|
u32 enable;
|
} tx_buf;
|
|
struct __packed2 {
|
u32 status;
|
} rx_buf;
|
|
tx_buf.enable = en;
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_SYS,
|
SCPI_SYS_SET_JTAGMUX_ON_OFF, tx_buf, rx_buf);
|
|
ret = scpi_execute_cmd(&sdata);
|
if (ret)
|
pr_err("set jtagmux on-off failed, ret=%d\n", ret);
|
else
|
ret = rx_buf.status;
|
|
return ret;
|
}
|
EXPORT_SYMBOL_GPL(scpi_sys_set_jtagmux_on_off);
|
|
int scpi_ddr_dclk_mode(u32 dclk_mode)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed1 {
|
u32 dclk_mode;
|
} tx_buf;
|
struct __packed2 {
|
u32 status;
|
} rx_buf;
|
|
tx_buf.dclk_mode = (u32)dclk_mode;
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_DDR,
|
SCPI_DDR_DCLK_MODE, tx_buf, rx_buf);
|
return scpi_execute_cmd(&sdata);
|
}
|
EXPORT_SYMBOL_GPL(scpi_ddr_dclk_mode);
|
|
int scpi_ddr_init(u32 dram_speed_bin, u32 freq, u32 lcdc_type, u32 addr_mcu_el3)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed1 {
|
u32 dram_speed_bin;
|
u32 freq;
|
u32 lcdc_type;
|
u32 addr_mcu_el3;
|
} tx_buf;
|
struct __packed2 {
|
u32 status;
|
} rx_buf;
|
|
tx_buf.dram_speed_bin = (u32)dram_speed_bin;
|
tx_buf.freq = (u32)freq;
|
tx_buf.lcdc_type = (u32)lcdc_type;
|
tx_buf.addr_mcu_el3 = addr_mcu_el3;
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_DDR,
|
SCPI_DDR_INIT, tx_buf, rx_buf);
|
return scpi_execute_cmd(&sdata);
|
}
|
EXPORT_SYMBOL_GPL(scpi_ddr_init);
|
|
int scpi_ddr_set_clk_rate(u32 rate, u32 lcdc_type)
|
{
|
int ret;
|
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed1 {
|
u32 clk_rate;
|
u32 lcdc_type;
|
} tx_buf;
|
struct __packed2 {
|
u32 status;
|
u32 freq;
|
} rx_buf;
|
|
tx_buf.clk_rate = (u32)rate;
|
tx_buf.lcdc_type = (u32)lcdc_type;
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_DDR,
|
SCPI_DDR_SET_FREQ, tx_buf, rx_buf);
|
ret = scpi_execute_cmd(&sdata);
|
|
if ((!ret) && (!rx_buf.status))
|
ret = rx_buf.freq;
|
else
|
ret = 0;
|
|
return ret;
|
}
|
EXPORT_SYMBOL_GPL(scpi_ddr_set_clk_rate);
|
|
int scpi_ddr_send_timing(u32 *p, u32 size)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed2 {
|
u32 status;
|
} rx_buf;
|
SCPI_SETUP_DBUF_BY_SIZE(sdata, mdata, SCPI_CL_DDR,
|
SCPI_DDR_SEND_TIMING, p, size, rx_buf);
|
return scpi_execute_cmd(&sdata);
|
}
|
EXPORT_SYMBOL_GPL(scpi_ddr_send_timing);
|
|
int scpi_ddr_round_rate(u32 m_hz)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed1 {
|
u32 clk_rate;
|
} tx_buf;
|
struct __packed2 {
|
u32 status;
|
u32 round_rate;
|
} rx_buf;
|
|
tx_buf.clk_rate = (u32)m_hz;
|
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_DDR,
|
SCPI_DDR_ROUND_RATE, tx_buf, rx_buf);
|
if (scpi_execute_cmd(&sdata))
|
return 0;
|
|
return rx_buf.round_rate;
|
}
|
EXPORT_SYMBOL_GPL(scpi_ddr_round_rate);
|
|
int scpi_ddr_set_auto_self_refresh(u32 en)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed1 {
|
u32 enable;
|
} tx_buf;
|
struct __packed2 {
|
u32 status;
|
} rx_buf;
|
|
tx_buf.enable = (u32)en;
|
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_DDR,
|
SCPI_DDR_AUTO_SELF_REFRESH, tx_buf, rx_buf);
|
return scpi_execute_cmd(&sdata);
|
}
|
EXPORT_SYMBOL_GPL(scpi_ddr_set_auto_self_refresh);
|
|
int scpi_ddr_get_clk_rate(void)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed1 {
|
u32 status;
|
} tx_buf;
|
struct __packed2 {
|
u32 status;
|
u32 clk_rate;
|
} rx_buf;
|
|
tx_buf.status = 0;
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_DDR,
|
SCPI_DDR_GET_FREQ, tx_buf, rx_buf);
|
if (scpi_execute_cmd(&sdata))
|
return 0;
|
|
return rx_buf.clk_rate;
|
}
|
EXPORT_SYMBOL_GPL(scpi_ddr_get_clk_rate);
|
|
int scpi_thermal_get_temperature(void)
|
{
|
int ret;
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed1 {
|
u32 status;
|
} tx_buf;
|
|
struct __packed2 {
|
u32 status;
|
u32 tsadc_data;
|
} rx_buf;
|
|
tx_buf.status = 0;
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_THERMAL,
|
SCPI_THERMAL_GET_TSADC_DATA, tx_buf, rx_buf);
|
|
ret = scpi_execute_cmd(&sdata);
|
if (ret) {
|
pr_err("get temperature from MCU failed, ret=%d\n", ret);
|
return ret;
|
}
|
|
return rx_buf.tsadc_data;
|
}
|
EXPORT_SYMBOL_GPL(scpi_thermal_get_temperature);
|
|
int scpi_thermal_set_clk_cycle(u32 cycle)
|
{
|
struct scpi_data_buf sdata;
|
struct rk3368_mbox_msg mdata;
|
struct __packed1 {
|
u32 clk_cycle;
|
} tx_buf;
|
|
struct __packed2 {
|
u32 status;
|
} rx_buf;
|
|
tx_buf.clk_cycle = cycle;
|
SCPI_SETUP_DBUF(sdata, mdata, SCPI_CL_THERMAL,
|
SCPI_THERMAL_SET_TSADC_CYCLE, tx_buf, rx_buf);
|
|
return scpi_execute_cmd(&sdata);
|
}
|
EXPORT_SYMBOL_GPL(scpi_thermal_set_clk_cycle);
|
|
static struct of_device_id mobx_scpi_of_match[] = {
|
{ .compatible = "rockchip,rk3368-scpi-legacy"},
|
{ },
|
};
|
MODULE_DEVICE_TABLE(of, mobx_scpi_of_match);
|
|
static int mobx_scpi_probe(struct platform_device *pdev)
|
{
|
int ret = 0;
|
int retry = 3;
|
int val = 0;
|
struct scpi_mcu_ver mcu_ver;
|
int check_version = 1; /*0: not check version, 1: check version*/
|
|
the_scpi_device = &pdev->dev;
|
|
/* try to get mboxes chan nums from DT */
|
if (of_property_read_u32((&pdev->dev)->of_node, "chan-nums", &val)) {
|
dev_err(&pdev->dev, "parse mboxes chan-nums failed\n");
|
ret = -EINVAL;
|
goto exit;
|
}
|
|
max_chan_num = val;
|
|
/* try to check up with SCPI version from MCU */
|
while ((retry--) && (check_version != 0)) {
|
memset(&mcu_ver, 0, sizeof(mcu_ver));
|
|
ret = scpi_get_version(SCPI_VERSION, &mcu_ver);
|
if ((ret == 0) && (mcu_ver.scpi_ver == SCPI_VERSION))
|
break;
|
}
|
|
if ((retry <= 0) && (check_version != 0)) {
|
dev_err(&pdev->dev,
|
"Scpi verison not match:kernel ver:0x%x, MCU ver:0x%x, ret=%d\n",
|
SCPI_VERSION, mcu_ver.scpi_ver, ret);
|
ret = -EIO;
|
goto exit;
|
}
|
|
dev_info(&pdev->dev, "Scpi initialize, version: 0x%x, chan nums: %d\n",
|
SCPI_VERSION, val);
|
|
if (check_version)
|
dev_info(&pdev->dev, "MCU version: %s\n", mcu_ver.mcu_ver);
|
|
return 0;
|
exit:
|
the_scpi_device = NULL;
|
return ret;
|
}
|
|
static struct platform_driver mbox_scpi_driver = {
|
.probe = mobx_scpi_probe,
|
.driver = {
|
.name = "mbox-scpi",
|
.of_match_table = of_match_ptr(mobx_scpi_of_match),
|
},
|
};
|
|
static int __init rockchip_mbox_scpi_init(void)
|
{
|
return platform_driver_register(&mbox_scpi_driver);
|
}
|
subsys_initcall(rockchip_mbox_scpi_init);
|
