asgardius/android_kernel_samsung_heroqlte
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
android_kernel_samsung_hero.../drivers/soundwire/swr-wcd-ctrl.c

1542 lines
38 KiB
C
Raw Normal View History

init: OSRC G9300ZCU2APF7
2016-08-17 10:41:52 +02:00
/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/soundwire/soundwire.h>
#include <linux/soundwire/swr-wcd.h>
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include "swrm_registers.h"
#include "swr-wcd-ctrl.h"
#define SWR_BROADCAST_CMD_ID 0x0F
#define SWR_AUTO_SUSPEND_DELAY 3 /* delay in sec */
#define SWR_DEV_ID_MASK 0xFFFFFFFF
#define SWR_REG_VAL_PACK(data, dev, id, reg) \
((reg) | ((id) << 16) | ((dev) << 20) | ((data) << 24))
/* pm runtime auto suspend timer in msecs */
static int auto_suspend_timer = SWR_AUTO_SUSPEND_DELAY * 1000;
module_param(auto_suspend_timer, int,
S_IRUGO | S_IWUSR | S_IWGRP);
MODULE_PARM_DESC(auto_suspend_timer, "timer for auto suspend");
static u8 mstr_ports[] = {100, 101, 102, 103, 104, 105, 106, 107};
static u8 mstr_port_type[] = {SWR_DAC_PORT, SWR_COMP_PORT, SWR_BOOST_PORT,
SWR_DAC_PORT, SWR_COMP_PORT, SWR_BOOST_PORT,
SWR_VISENSE_PORT, SWR_VISENSE_PORT};
struct usecase uc[] = {
{0, 0, 0}, /* UC0: no ports */
{1, 1, 2400}, /* UC1: Spkr */
{1, 4, 600}, /* UC2: Compander */
{1, 2, 300}, /* UC3: Smart Boost */
{1, 2, 1200}, /* UC4: VI Sense */
{4, 9, 4500}, /* UC5: Spkr + Comp + SB + VI */
{8, 18, 9000}, /* UC6: 2*(Spkr + Comp + SB + VI) */
{2, 2, 4800}, /* UC7: 2*Spkr */
{2, 5, 3000}, /* UC8: Spkr + Comp */
{4, 10, 6000}, /* UC9: 2*(Spkr + Comp) */
{3, 7, 3300}, /* UC10: Spkr + Comp + SB */
{6, 14, 6600}, /* UC11: 2*(Spkr + Comp + SB) */
{2, 3, 2700}, /* UC12: Spkr + SB */
{4, 6, 5400}, /* UC13: 2*(Spkr + SB) */
};
#define MAX_USECASE ARRAY_SIZE(uc)
struct port_params pp[MAX_USECASE][SWR_MSTR_PORT_LEN] = {
/* UC 0 */
{
{0, 0, 0},
},
/* UC 1 */
{
{7, 1, 0},
},
/* UC 2 */
{
{31, 2, 0},
},
/* UC 3 */
{
{63, 12, 31},
},
/* UC 4 */
{
{15, 7, 0},
},
/* UC 5 */
{
{7, 1, 0},
{31, 2, 0},
{63, 12, 31},
{15, 7, 0},
},
/* UC 6 */
{
{7, 1, 0},
{31, 2, 0},
{63, 12, 31},
{15, 7, 0},
{7, 6, 0},
{31, 18, 0},
{63, 13, 31},
{15, 10, 0},
},
/* UC 7 */
{
{7, 1, 0},
{7, 6, 0},
},
/* UC 8 */
{
{7, 1, 0},
{31, 2, 0},
},
/* UC 9 */
{
{7, 1, 0},
{31, 2, 0},
{7, 6, 0},
{31, 18, 0},
},
/* UC 10 */
{
{7, 1, 0},
{31, 2, 0},
{63, 12, 31},
},
/* UC 11 */
{
{7, 1, 0},
{31, 2, 0},
{63, 12, 31},
{7, 6, 0},
{31, 18, 0},
{63, 13, 31},
},
/* UC 12 */
{
{7, 1, 0},
{63, 12, 31},
},
/* UC 13 */
{
{7, 1, 0},
{63, 12, 31},
{7, 6, 0},
{63, 13, 31},
},
};
enum {
SWR_NOT_PRESENT, /* Device is detached/not present on the bus */
SWR_ATTACHED_OK, /* Device is attached */
SWR_ALERT, /* Device alters master for any interrupts */
SWR_RESERVED, /* Reserved */
};
#define SWRM_MAX_PORT_REG 40
#define SWRM_MAX_INIT_REG 8
#define SWR_MSTR_MAX_REG_ADDR 0x1740
#define SWR_MSTR_START_REG_ADDR 0x00
#define SWR_MSTR_MAX_BUF_LEN 20
#define BYTES_PER_LINE 12
#define SWR_MSTR_RD_BUF_LEN 8
#define SWR_MSTR_WR_BUF_LEN 32
static struct swr_mstr_ctrl *dbgswrm;
static struct dentry *debugfs_swrm_dent;
static struct dentry *debugfs_peek;
static struct dentry *debugfs_poke;
static struct dentry *debugfs_reg_dump;
static unsigned int read_data;
static int swrm_debug_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
static int get_parameters(char *buf, u32 *param1, int num_of_par)
{
char *token;
int base, cnt;
token = strsep(&buf, " ");
for (cnt = 0; cnt < num_of_par; cnt++) {
if (token) {
if ((token[1] == 'x') || (token[1] == 'X'))
base = 16;
else
base = 10;
if (kstrtou32(token, base, &param1[cnt]) != 0)
return -EINVAL;
token = strsep(&buf, " ");
} else
return -EINVAL;
}
return 0;
}
static ssize_t swrm_reg_show(char __user *ubuf, size_t count,
loff_t *ppos)
{
int i, reg_val, len;
ssize_t total = 0;
char tmp_buf[SWR_MSTR_MAX_BUF_LEN];
if (!ubuf || !ppos)
return 0;
for (i = (((int) *ppos / BYTES_PER_LINE) + SWR_MSTR_START_REG_ADDR);
i <= SWR_MSTR_MAX_REG_ADDR; i += 4) {
reg_val = dbgswrm->read(dbgswrm->handle, i);
len = snprintf(tmp_buf, 25, "0x%.3x: 0x%.2x\n", i, reg_val);
if ((total + len) >= count - 1)
break;
if (copy_to_user((ubuf + total), tmp_buf, len)) {
pr_err("%s: fail to copy reg dump\n", __func__);
total = -EFAULT;
goto copy_err;
}
*ppos += len;
total += len;
}
copy_err:
return total;
}
static ssize_t swrm_debug_read(struct file *file, char __user *ubuf,
size_t count, loff_t *ppos)
{
char lbuf[SWR_MSTR_RD_BUF_LEN];
char *access_str;
ssize_t ret_cnt;
if (!count || !file || !ppos || !ubuf)
return -EINVAL;
access_str = file->private_data;
if (*ppos < 0)
return -EINVAL;
if (!strcmp(access_str, "swrm_peek")) {
snprintf(lbuf, sizeof(lbuf), "0x%x\n", read_data);
ret_cnt = simple_read_from_buffer(ubuf, count, ppos, lbuf,
strnlen(lbuf, 7));
} else if (!strcmp(access_str, "swrm_reg_dump")) {
ret_cnt = swrm_reg_show(ubuf, count, ppos);
} else {
pr_err("%s: %s not permitted to read\n", __func__, access_str);
ret_cnt = -EPERM;
}
return ret_cnt;
}
static ssize_t swrm_debug_write(struct file *filp,
const char __user *ubuf, size_t cnt, loff_t *ppos)
{
char lbuf[SWR_MSTR_WR_BUF_LEN];
int rc;
u32 param[5];
char *access_str;
if (!filp || !ppos || !ubuf)
return -EINVAL;
access_str = filp->private_data;
if (cnt > sizeof(lbuf) - 1)
return -EINVAL;
rc = copy_from_user(lbuf, ubuf, cnt);
if (rc)
return -EFAULT;
lbuf[cnt] = '\0';
if (!strcmp(access_str, "swrm_poke")) {
/* write */
rc = get_parameters(lbuf, param, 2);
if ((param[0] <= SWR_MSTR_MAX_REG_ADDR) &&
(param[1] <= 0xFFFFFFFF) &&
(rc == 0))
rc = dbgswrm->write(dbgswrm->handle, param[0],
param[1]);
else
rc = -EINVAL;
} else if (!strcmp(access_str, "swrm_peek")) {
/* read */
rc = get_parameters(lbuf, param, 1);
if ((param[0] <= SWR_MSTR_MAX_REG_ADDR) && (rc == 0))
read_data = dbgswrm->read(dbgswrm->handle, param[0]);
else
rc = -EINVAL;
}
if (rc == 0)
rc = cnt;
else
pr_err("%s: rc = %d\n", __func__, rc);
return rc;
}
static const struct file_operations swrm_debug_ops = {
.open = swrm_debug_open,
.write = swrm_debug_write,
.read = swrm_debug_read,
};
static int swrm_set_ch_map(struct swr_mstr_ctrl *swrm, void *data)
{
struct swr_mstr_port *pinfo = (struct swr_mstr_port *)data;
swrm->mstr_port = kzalloc(sizeof(struct swr_mstr_port), GFP_KERNEL);
if (swrm->mstr_port == NULL)
return -ENOMEM;
swrm->mstr_port->num_port = pinfo->num_port;
swrm->mstr_port->port = kzalloc((pinfo->num_port * sizeof(u8)),
GFP_KERNEL);
if (!swrm->mstr_port->port) {
kfree(swrm->mstr_port);
return -ENOMEM;
}
memcpy(swrm->mstr_port->port, pinfo->port, pinfo->num_port);
return 0;
}
static bool swrm_is_port_en(struct swr_master *mstr)
{
return !!(mstr->num_port);
}
static int swrm_clk_request(struct swr_mstr_ctrl *swrm, bool enable)
{
if (!swrm->clk || !swrm->handle)
return -EINVAL;
if (enable) {
swrm->clk(swrm->handle, true);
swrm->state = SWR_MSTR_UP;
} else {
swrm->clk(swrm->handle, false);
swrm->state = SWR_MSTR_DOWN;
}
return 0;
}
static int swrm_get_port_config(struct swr_master *master)
{
u32 ch_rate = 0;
u32 num_ch = 0;
int i, uc_idx;
u32 portcount = 0;
for (i = 0; i < SWR_MSTR_PORT_LEN; i++) {
if (master->port[i].port_en) {
ch_rate += master->port[i].ch_rate;
num_ch += master->port[i].num_ch;
portcount++;
}
}
for (i = 0; i < ARRAY_SIZE(uc); i++) {
if ((uc[i].num_port == portcount) &&
(uc[i].num_ch == num_ch) &&
(uc[i].chrate == ch_rate)) {
uc_idx = i;
break;
}
}
if (i >= ARRAY_SIZE(uc)) {
dev_err(&master->dev,
"%s: usecase port:%d, num_ch:%d, chrate:%d not found\n",
__func__, master->num_port, num_ch, ch_rate);
return -EINVAL;
}
for (i = 0; i < SWR_MSTR_PORT_LEN; i++) {
if (master->port[i].port_en) {
master->port[i].sinterval = pp[uc_idx][i].si;
master->port[i].offset1 = pp[uc_idx][i].off1;
master->port[i].offset2 = pp[uc_idx][i].off2;
}
}
return 0;
}
static int swrm_get_master_port(u8 *mstr_port_id, u8 slv_port_id)
{
int i;
for (i = 0; i < SWR_MSTR_PORT_LEN; i++) {
if (mstr_ports[i] == slv_port_id) {
*mstr_port_id = i;
return 0;
}
}
return -EINVAL;
}
static u32 swrm_get_packed_reg_val(u8 *cmd_id, u8 cmd_data,
u8 dev_addr, u16 reg_addr)
{
u32 val;
u8 id = *cmd_id;
if (id != SWR_BROADCAST_CMD_ID) {
if (id < 14)
id += 1;
else
id = 0;
*cmd_id = id;
}
val = SWR_REG_VAL_PACK(cmd_data, dev_addr, id, reg_addr);
return val;
}
static int swrm_cmd_fifo_rd_cmd(struct swr_mstr_ctrl *swrm, int *cmd_data,
u8 dev_addr, u8 cmd_id, u16 reg_addr,
u32 len)
{
u32 val;
int ret = 0;
val = swrm_get_packed_reg_val(&swrm->rcmd_id, len, dev_addr, reg_addr);
ret = swrm->write(swrm->handle, SWRM_CMD_FIFO_RD_CMD, val);
if (ret < 0) {
dev_err(swrm->dev, "%s: reg 0x%x write failed, err:%d\n",
__func__, val, ret);
goto err;
}
*cmd_data = swrm->read(swrm->handle, SWRM_CMD_FIFO_RD_FIFO_ADDR);
dev_dbg(swrm->dev,
"%s: reg: 0x%x, cmd_id: 0x%x, dev_id: 0x%x, cmd_data: 0x%x\n",
__func__, reg_addr, cmd_id, dev_addr, *cmd_data);
err:
return ret;
}
static int swrm_cmd_fifo_wr_cmd(struct swr_mstr_ctrl *swrm, u8 cmd_data,
u8 dev_addr, u8 cmd_id, u16 reg_addr)
{
u32 val;
int ret = 0;
if (!cmd_id)
val = swrm_get_packed_reg_val(&swrm->wcmd_id, cmd_data,
dev_addr, reg_addr);
else
val = swrm_get_packed_reg_val(&cmd_id, cmd_data,
dev_addr, reg_addr);
dev_dbg(swrm->dev,
"%s: reg: 0x%x, cmd_id: 0x%x, dev_id: 0x%x, cmd_data: 0x%x\n",
__func__, reg_addr, cmd_id, dev_addr, cmd_data);
ret = swrm->write(swrm->handle, SWRM_CMD_FIFO_WR_CMD, val);
if (ret < 0) {
dev_err(swrm->dev, "%s: reg 0x%x write failed, err:%d\n",
__func__, val, ret);
goto err;
}
if (cmd_id == 0xF)
wait_for_completion_timeout(&swrm->broadcast, (2 * HZ/10));
err:
return ret;
}
static int swrm_read(struct swr_master *master, u8 dev_num, u16 reg_addr,
void *buf, u32 len)
{
struct swr_mstr_ctrl *swrm = swr_get_ctrl_data(master);
int ret = 0;
int val;
u8 *reg_val = (u8 *)buf;
if (!swrm) {
dev_err(&master->dev, "%s: swrm is NULL\n", __func__);
return -EINVAL;
}
if (dev_num)
ret = swrm_cmd_fifo_rd_cmd(swrm, &val, dev_num, 0, reg_addr,
len);
else
val = swrm->read(swrm->handle, reg_addr);
*reg_val = (u8)val;
pm_runtime_mark_last_busy(&swrm->pdev->dev);
return ret;
}
static int swrm_write(struct swr_master *master, u8 dev_num, u16 reg_addr,
const void *buf)
{
struct swr_mstr_ctrl *swrm = swr_get_ctrl_data(master);
int ret = 0;
u8 reg_val = *(u8 *)buf;
if (!swrm) {
dev_err(&master->dev, "%s: swrm is NULL\n", __func__);
return -EINVAL;
}
if (dev_num)
ret = swrm_cmd_fifo_wr_cmd(swrm, reg_val, dev_num, 0, reg_addr);
else
ret = swrm->write(swrm->handle, reg_addr, reg_val);
pm_runtime_mark_last_busy(&swrm->pdev->dev);
return ret;
}
static int swrm_bulk_write(struct swr_master *master, u8 dev_num, void *reg,
const void *buf, size_t len)
{
struct swr_mstr_ctrl *swrm = swr_get_ctrl_data(master);
int ret = 0;
int i;
u32 *val;
u32 *swr_fifo_reg;
if (!swrm || !swrm->handle) {
dev_err(&master->dev, "%s: swrm is NULL\n", __func__);
return -EINVAL;
}
if (len <= 0)
return -EINVAL;
if (dev_num) {
swr_fifo_reg = kcalloc(len, sizeof(u32), GFP_KERNEL);
if (!swr_fifo_reg) {
ret = -ENOMEM;
goto err;
}
val = kcalloc(len, sizeof(u32), GFP_KERNEL);
if (!val) {
ret = -ENOMEM;
goto mem_fail;
}
for (i = 0; i < len; i++) {
val[i] = swrm_get_packed_reg_val(&swrm->wcmd_id,
((u8 *)buf)[i],
dev_num,
((u16 *)reg)[i]);
swr_fifo_reg[i] = SWRM_CMD_FIFO_WR_CMD;
}
ret = swrm->bulk_write(swrm->handle, swr_fifo_reg, val, len);
if (ret) {
dev_err(&master->dev, "%s: bulk write failed\n",
__func__);
ret = -EINVAL;
}
} else {
dev_err(&master->dev,
"%s: No support of Bulk write for master regs\n",
__func__);
ret = -EINVAL;
goto err;
}
kfree(val);
mem_fail:
kfree(swr_fifo_reg);
err:
pm_runtime_mark_last_busy(&swrm->pdev->dev);
return ret;
}
static u8 get_inactive_bank_num(struct swr_mstr_ctrl *swrm)
{
return (swrm->read(swrm->handle, SWRM_MCP_STATUS) &
SWRM_MCP_STATUS_BANK_NUM_MASK) ? 0 : 1;
}
static void enable_bank_switch(struct swr_mstr_ctrl *swrm, u8 bank,
u8 row, u8 col)
{
swrm_cmd_fifo_wr_cmd(swrm, ((row << 3) | col), 0xF, 0xF,
SWRS_SCP_FRAME_CTRL_BANK(bank));
}
static struct swr_port_info *swrm_get_port(struct swr_master *master,
u8 port_id)
{
int i;
struct swr_port_info *port = NULL;
for (i = 0; i < SWR_MSTR_PORT_LEN; i++) {
port = &master->port[i];
if ((port->port_id == port_id) && (port->port_en == true))
break;
}
if (i == SWR_MSTR_PORT_LEN)
port = NULL;
return port;
}
static void swrm_apply_port_config(struct swr_master *master)
{
u32 value;
struct swr_port_info *port;
u8 bank;
int i;
int port_type;
struct swrm_mports *mport;
struct swr_mstr_ctrl *swrm = swr_get_ctrl_data(master);
u32 reg[SWRM_MAX_PORT_REG];
u32 val[SWRM_MAX_PORT_REG];
int len = 0;
int mask = (SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK |
SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK);
bank = get_inactive_bank_num(swrm);
dev_dbg(swrm->dev, "%s: enter bank: %d master_ports: %d\n",
__func__, bank, master->num_port);
/* set Row = 48 and col = 16 */
value = swrm->read(swrm->handle, SWRM_MCP_FRAME_CTRL_BANK_ADDR(bank));
value &= (~mask);
value |= ((0 << SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_SHFT) |
(7 << SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_SHFT));
swrm->write(swrm->handle, SWRM_MCP_FRAME_CTRL_BANK_ADDR(bank), value);
dev_dbg(swrm->dev, "%s: regaddr: 0x%x, value: 0x%x\n", __func__,
SWRM_MCP_FRAME_CTRL_BANK_ADDR(bank), value);
swrm_cmd_fifo_wr_cmd(swrm, 0x01, 0xF, 0x00,
SWRS_SCP_HOST_CLK_DIV2_CTL_BANK(bank));
mport = list_first_entry_or_null(&swrm->mport_list,
struct swrm_mports,
list);
if (!mport) {
dev_err(swrm->dev, "%s: list is empty\n", __func__);
return;
}
for (i = 0; i < master->num_port; i++) {
port = swrm_get_port(master, mstr_ports[mport->id]);
if (!port)
continue;
port_type = mstr_port_type[mport->id];
if (!port->dev_id || (port->dev_id > master->num_dev)) {
dev_dbg(swrm->dev, "%s: invalid device id = %d\n",
__func__, port->dev_id);
continue;
}
value = ((port->ch_en)
<< SWRM_DP_PORT_CTRL_EN_CHAN_SHFT);
value |= ((port->offset2)
<< SWRM_DP_PORT_CTRL_OFFSET2_SHFT);
value |= ((port->offset1)
<< SWRM_DP_PORT_CTRL_OFFSET1_SHFT);
value |= port->sinterval;
reg[len] = SWRM_DP_PORT_CTRL_BANK((mport->id+1), bank);
val[len++] = value;
dev_dbg(swrm->dev, "%s: mport :%d, reg: 0x%x, val: 0x%x\n",
__func__, mport->id,
(SWRM_DP_PORT_CTRL_BANK((mport->id+1), bank)), value);
reg[len] = SWRM_CMD_FIFO_WR_CMD;
val[len++] = SWR_REG_VAL_PACK(port->ch_en, port->dev_id, 0x00,
SWRS_DP_CHANNEL_ENABLE_BANK(port_type, bank));
reg[len] = SWRM_CMD_FIFO_WR_CMD;
val[len++] = SWR_REG_VAL_PACK(port->sinterval,
port->dev_id, 0x00,
SWRS_DP_SAMPLE_CONTROL_1_BANK(port_type, bank));
reg[len] = SWRM_CMD_FIFO_WR_CMD;
val[len++] = SWR_REG_VAL_PACK(port->offset1,
port->dev_id, 0x00,
SWRS_DP_OFFSET_CONTROL_1_BANK(port_type, bank));
if (port_type != 0) {
reg[len] = SWRM_CMD_FIFO_WR_CMD;
val[len++] = SWR_REG_VAL_PACK(port->offset2,
port->dev_id, 0x00,
SWRS_DP_OFFSET_CONTROL_2_BANK(port_type,
bank));
}
mport = list_next_entry(mport, list);
if (!mport) {
dev_err(swrm->dev, "%s: end of list\n", __func__);
break;
}
}
swrm->bulk_write(swrm->handle, reg, val, len);
enable_bank_switch(swrm, bank, SWR_MAX_ROW, SWR_MAX_COL);
}
static int swrm_connect_port(struct swr_master *master,
struct swr_params *portinfo)
{
int i;
struct swr_port_info *port;
int ret = 0;
struct swr_mstr_ctrl *swrm = swr_get_ctrl_data(master);
struct swrm_mports *mport;
dev_dbg(&master->dev, "%s: enter\n", __func__);
if (!portinfo)
return -EINVAL;
mutex_lock(&swrm->mlock);
if (!swrm_is_port_en(master))
pm_runtime_get_sync(&swrm->pdev->dev);
for (i = 0; i < portinfo->num_port; i++) {
mport = kzalloc(sizeof(struct swrm_mports), GFP_KERNEL);
if (!mport) {
ret = -ENOMEM;
goto mem_fail;
}
ret = swrm_get_master_port(&mport->id,
portinfo->port_id[i]);
if (ret < 0) {
dev_err(&master->dev,
"%s: mstr portid for slv port %d not found\n",
__func__, portinfo->port_id[i]);
goto port_fail;
}
list_add(&mport->list, &swrm->mport_list);
port = &master->port[(master->num_port+i)];
port->dev_id = portinfo->dev_id;
port->port_id = portinfo->port_id[i];
port->num_ch = portinfo->num_ch[i];
port->ch_rate = portinfo->ch_rate[i];
port->ch_en = portinfo->ch_en[i];
port->port_en = true;
dev_dbg(&master->dev,
"%s: mstr port %d, slv port %d ch_rate %d num_ch %d\n",
__func__, mport->id, port->port_id, port->ch_rate,
port->num_ch);
}
master->num_port += portinfo->num_port;
if (master->num_port >= SWR_MSTR_PORT_LEN)
master->num_port = SWR_MSTR_PORT_LEN;
swrm_get_port_config(master);
swr_port_response(master, portinfo->tid);
swrm_apply_port_config(master);
mutex_unlock(&swrm->mlock);
return 0;
port_fail:
kfree(mport);
mem_fail:
mutex_unlock(&swrm->mlock);
return ret;
}
static int swrm_disconnect_port(struct swr_master *master,
struct swr_params *portinfo)
{
int i;
struct swr_port_info *port;
struct swrm_mports *mport;
struct list_head *ptr, *next;
u8 bank;
int ret = 0;
u8 mport_id = 0;
int port_type = 0;
struct swr_mstr_ctrl *swrm = swr_get_ctrl_data(master);
if (!portinfo) {
dev_err(&master->dev, "%s: portinfo is NULL\n", __func__);
return -EINVAL;
}
mutex_lock(&swrm->mlock);
bank = get_inactive_bank_num(swrm);
for (i = 0; i < portinfo->num_port; i++) {
ret = swrm_get_master_port(&mport_id,
portinfo->port_id[i]);
if (ret < 0) {
dev_err(&master->dev,
"%s: mstr portid for slv port %d not found\n",
__func__, portinfo->port_id[i]);
mutex_unlock(&swrm->mlock);
return -EINVAL;
}
port = swrm_get_port(master, portinfo->port_id[i]);
if (!port) {
dev_dbg(&master->dev, "%s: port %d already disabled\n",
__func__, portinfo->port_id[i]);
continue;
}
port_type = mstr_port_type[mport_id];
port->dev_id = portinfo->dev_id;
port->port_en = false;
port->ch_en = 0;
swrm->write(swrm->handle,
SWRM_DP_PORT_CTRL_BANK((mport_id+1), bank),
0);
swrm_cmd_fifo_wr_cmd(swrm, 0x00, port->dev_id, 0x00,
SWRS_DP_CHANNEL_ENABLE_BANK(port_type, bank));
list_for_each_safe(ptr, next, &swrm->mport_list) {
mport = list_entry(ptr, struct swrm_mports, list);
if (mport->id == mport_id) {
list_del(&mport->list);
kfree(mport);
}
}
}
enable_bank_switch(swrm, bank, SWR_MAX_ROW, SWR_MAX_COL);
if (master->num_port >= SWR_MSTR_PORT_LEN)
master->num_port = SWR_MSTR_PORT_LEN;
master->num_port -= portinfo->num_port;
swr_port_response(master, portinfo->tid);
mutex_unlock(&swrm->mlock);
dev_dbg(&master->dev, "%s: master active ports: %d\n",
__func__, master->num_port);
if (!swrm_is_port_en(master)) {
dev_dbg(&master->dev, "%s: pm_runtime auto suspend triggered\n",
__func__);
pm_runtime_mark_last_busy(&swrm->pdev->dev);
pm_runtime_put_autosuspend(&swrm->pdev->dev);
}
return 0;
}
static int swrm_check_slave_change_status(struct swr_mstr_ctrl *swrm,
int status, u8 *devnum)
{
int i;
int new_sts = status;
int ret = SWR_NOT_PRESENT;
if (status != swrm->slave_status) {
for (i = 0; i < (swrm->master.num_dev + 1); i++) {
if ((status & SWRM_MCP_SLV_STATUS_MASK) !=
(swrm->slave_status & SWRM_MCP_SLV_STATUS_MASK)) {
ret = (status & SWRM_MCP_SLV_STATUS_MASK);
*devnum = i;
break;
}
status >>= 2;
swrm->slave_status >>= 2;
}
swrm->slave_status = new_sts;
}
return ret;
}
static irqreturn_t swr_mstr_interrupt(int irq, void *dev)
{
struct swr_mstr_ctrl *swrm = dev;
u32 value, intr_sts;
int status, chg_sts, i;
u8 devnum = 0;
int ret = IRQ_HANDLED;
pm_runtime_get_sync(&swrm->pdev->dev);
intr_sts = swrm->read(swrm->handle, SWRM_INTERRUPT_STATUS);
intr_sts &= SWRM_INTERRUPT_STATUS_RMSK;
for (i = 0; i < SWRM_INTERRUPT_MAX; i++) {
value = intr_sts & (1 << i);
if (!value)
continue;
swrm->write(swrm->handle, SWRM_INTERRUPT_CLEAR, value);
switch (value) {
case SWRM_INTERRUPT_STATUS_SLAVE_PEND_IRQ:
dev_dbg(swrm->dev, "SWR slave pend irq\n");
break;
case SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED:
dev_dbg(swrm->dev, "SWR new slave attached\n");
break;
case SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS:
status = swrm->read(swrm->handle, SWRM_MCP_SLV_STATUS);
if (status == swrm->slave_status) {
dev_dbg(swrm->dev,
"%s: No change in slave status: %d\n",
__func__, status);
break;
}
chg_sts = swrm_check_slave_change_status(swrm, status,
&devnum);
switch (chg_sts) {
case SWR_NOT_PRESENT:
dev_dbg(swrm->dev, "device %d got detached\n",
devnum);
break;
case SWR_ATTACHED_OK:
dev_dbg(swrm->dev, "device %d got attached\n",
devnum);
break;
case SWR_ALERT:
dev_dbg(swrm->dev,
"device %d has pending interrupt\n",
devnum);
break;
}
break;
case SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET:
dev_err_ratelimited(swrm->dev, "SWR bus clash detected\n");
break;
case SWRM_INTERRUPT_STATUS_RD_FIFO_OVERFLOW:
dev_dbg(swrm->dev, "SWR read FIFO overflow\n");
break;
case SWRM_INTERRUPT_STATUS_RD_FIFO_UNDERFLOW:
dev_dbg(swrm->dev, "SWR read FIFO underflow\n");
break;
case SWRM_INTERRUPT_STATUS_WR_CMD_FIFO_OVERFLOW:
dev_dbg(swrm->dev, "SWR write FIFO overflow\n");
break;
case SWRM_INTERRUPT_STATUS_CMD_ERROR:
value = swrm->read(swrm->handle, SWRM_CMD_FIFO_STATUS);
dev_err_ratelimited(swrm->dev,
"SWR CMD error, fifo status 0x%x, flushing fifo\n",
value);
swrm->write(swrm->handle, SWRM_CMD_FIFO_CMD, 0x1);
break;
case SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION:
dev_dbg(swrm->dev, "SWR Port collision detected\n");
break;
case SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH:
dev_dbg(swrm->dev, "SWR read enable valid mismatch\n");
break;
case SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED:
complete(&swrm->broadcast);
dev_dbg(swrm->dev, "SWR cmd id finished\n");
break;
case SWRM_INTERRUPT_STATUS_NEW_SLAVE_AUTO_ENUM_FINISHED:
break;
case SWRM_INTERRUPT_STATUS_AUTO_ENUM_FAILED:
break;
case SWRM_INTERRUPT_STATUS_AUTO_ENUM_TABLE_IS_FULL:
break;
case SWRM_INTERRUPT_STATUS_BUS_RESET_FINISHED:
complete(&swrm->reset);
break;
case SWRM_INTERRUPT_STATUS_CLK_STOP_FINISHED:
break;
default:
dev_err_ratelimited(swrm->dev, "SWR unknown interrupt\n");
ret = IRQ_NONE;
break;
}
}
pm_runtime_mark_last_busy(&swrm->pdev->dev);
pm_runtime_put_autosuspend(&swrm->pdev->dev);
return ret;
}
static int swrm_get_device_status(struct swr_mstr_ctrl *swrm, u8 devnum)
{
u32 val;
swrm->slave_status = swrm->read(swrm->handle, SWRM_MCP_SLV_STATUS);
val = (swrm->slave_status >> (devnum * 2));
val &= SWRM_MCP_SLV_STATUS_MASK;
return val;
}
static int swrm_get_logical_dev_num(struct swr_master *mstr, u64 dev_id,
u8 *dev_num)
{
int i;
u64 id;
int ret = -EINVAL;
struct swr_mstr_ctrl *swrm = swr_get_ctrl_data(mstr);
pm_runtime_get_sync(&swrm->pdev->dev);
for (i = 1; i < (mstr->num_dev + 1); i++) {
id = ((u64)(swrm->read(swrm->handle,
SWRM_ENUMERATOR_SLAVE_DEV_ID_2(i))) << 32);
id |= swrm->read(swrm->handle,
SWRM_ENUMERATOR_SLAVE_DEV_ID_1(i));
if ((id & SWR_DEV_ID_MASK) == dev_id) {
if (swrm_get_device_status(swrm, i) == 0x01) {
*dev_num = i;
ret = 0;
} else {
dev_err(swrm->dev, "%s: device is not ready\n",
__func__);
}
goto found;
}
}
dev_err(swrm->dev, "%s: device id 0x%llx does not match with 0x%llx\n",
__func__, id, dev_id);
found:
pm_runtime_mark_last_busy(&swrm->pdev->dev);
pm_runtime_put_autosuspend(&swrm->pdev->dev);
return ret;
}
static int swrm_master_init(struct swr_mstr_ctrl *swrm)
{
int ret = 0;
u32 val;
u8 row_ctrl = SWR_MAX_ROW;
u8 col_ctrl = SWR_MIN_COL;
u8 retry_cmd_num = 3;
u32 reg[SWRM_MAX_INIT_REG];
u32 value[SWRM_MAX_INIT_REG];
int len = 0;
/* Clear Rows and Cols */
val = ((row_ctrl << SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_SHFT) |
(col_ctrl << SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_SHFT));
reg[len] = SWRM_MCP_FRAME_CTRL_BANK_ADDR(0);
value[len++] = val;
/* Set Auto enumeration flag */
reg[len] = SWRM_ENUMERATOR_CFG_ADDR;
value[len++] = 1;
/* Mask soundwire interrupts */
reg[len] = SWRM_INTERRUPT_MASK_ADDR;
value[len++] = 0x1FFFD;
/* Configure No pings */
val = swrm->read(swrm->handle, SWRM_MCP_CFG_ADDR);
val &= ~SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK;
val |= (0x1f << SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_SHFT);
reg[len] = SWRM_MCP_CFG_ADDR;
value[len++] = val;
/* Configure number of retries of a read/write cmd */
val = (retry_cmd_num << SWRM_CMD_FIFO_CFG_NUM_OF_CMD_RETRY_SHFT);
reg[len] = SWRM_CMD_FIFO_CFG_ADDR;
value[len++] = val;
/* Set IRQ to PULSE */
reg[len] = SWRM_COMP_CFG_ADDR;
value[len++] = 0x02;
reg[len] = SWRM_MCP_BUS_CTRL_ADDR;
value[len++] = 0x02;
reg[len] = SWRM_COMP_CFG_ADDR;
value[len++] = 0x03;
swrm->bulk_write(swrm->handle, reg, value, len);
return ret;
}
static int swrm_probe(struct platform_device *pdev)
{
struct swr_mstr_ctrl *swrm;
struct swr_ctrl_platform_data *pdata;
struct swr_device *swr_dev, *safe;
int ret;
/* Allocate soundwire master driver structure */
swrm = kzalloc(sizeof(struct swr_mstr_ctrl), GFP_KERNEL);
if (!swrm) {
dev_err(&pdev->dev, "%s: no memory for swr mstr controller\n",
__func__);
ret = -ENOMEM;
goto err_memory_fail;
}
swrm->dev = &pdev->dev;
swrm->pdev = pdev;
platform_set_drvdata(pdev, swrm);
swr_set_ctrl_data(&swrm->master, swrm);
pdata = dev_get_platdata(&pdev->dev);
if (!pdata) {
dev_err(&pdev->dev, "%s: pdata from parent is NULL\n",
__func__);
ret = -EINVAL;
goto err_pdata_fail;
}
swrm->handle = (void *)pdata->handle;
if (!swrm->handle) {
dev_err(&pdev->dev, "%s: swrm->handle is NULL\n",
__func__);
ret = -EINVAL;
goto err_pdata_fail;
}
swrm->read = pdata->read;
if (!swrm->read) {
dev_err(&pdev->dev, "%s: swrm->read is NULL\n",
__func__);
ret = -EINVAL;
goto err_pdata_fail;
}
swrm->write = pdata->write;
if (!swrm->write) {
dev_err(&pdev->dev, "%s: swrm->write is NULL\n",
__func__);
ret = -EINVAL;
goto err_pdata_fail;
}
swrm->bulk_write = pdata->bulk_write;
if (!swrm->bulk_write) {
dev_err(&pdev->dev, "%s: swrm->bulk_write is NULL\n",
__func__);
ret = -EINVAL;
goto err_pdata_fail;
}
swrm->clk = pdata->clk;
if (!swrm->clk) {
dev_err(&pdev->dev, "%s: swrm->clk is NULL\n",
__func__);
ret = -EINVAL;
goto err_pdata_fail;
}
swrm->reg_irq = pdata->reg_irq;
if (!swrm->reg_irq) {
dev_err(&pdev->dev, "%s: swrm->reg_irq is NULL\n",
__func__);
ret = -EINVAL;
goto err_pdata_fail;
}
swrm->master.read = swrm_read;
swrm->master.write = swrm_write;
swrm->master.bulk_write = swrm_bulk_write;
swrm->master.get_logical_dev_num = swrm_get_logical_dev_num;
swrm->master.connect_port = swrm_connect_port;
swrm->master.disconnect_port = swrm_disconnect_port;
swrm->master.dev.parent = &pdev->dev;
swrm->master.dev.of_node = pdev->dev.of_node;
swrm->master.num_port = 0;
swrm->num_enum_slaves = 0;
swrm->rcmd_id = 0;
swrm->wcmd_id = 0;
swrm->slave_status = 0;
swrm->state = SWR_MSTR_RESUME;
init_completion(&swrm->reset);
init_completion(&swrm->broadcast);
mutex_init(&swrm->mlock);
INIT_LIST_HEAD(&swrm->mport_list);
mutex_init(&swrm->reslock);
ret = swrm->reg_irq(swrm->handle, swr_mstr_interrupt, swrm,
SWR_IRQ_REGISTER);
if (ret) {
dev_err(&pdev->dev, "%s: IRQ register failed ret %d\n",
__func__, ret);
goto err_irq_fail;
}
ret = swr_register_master(&swrm->master);
if (ret) {
dev_err(&pdev->dev, "%s: error adding swr master\n", __func__);
goto err_mstr_fail;
}
if (pdev->dev.of_node)
of_register_swr_devices(&swrm->master);
/* Add devices registered with board-info as the
controller will be up now
*/
swr_master_add_boarddevices(&swrm->master);
mutex_lock(&swrm->mlock);
swrm_clk_request(swrm, true);
ret = swrm_master_init(swrm);
if (ret < 0) {
dev_err(&pdev->dev,
"%s: Error in master Initializaiton, err %d\n",
__func__, ret);
mutex_unlock(&swrm->mlock);
goto err_mstr_fail;
}
/* Enumerate slave devices */
list_for_each_entry_safe(swr_dev, safe, &swrm->master.devices,
dev_list) {
ret = swr_startup_devices(swr_dev);
if (ret)
list_del(&swr_dev->dev_list);
}
mutex_unlock(&swrm->mlock);
dbgswrm = swrm;
debugfs_swrm_dent = debugfs_create_dir(dev_name(&pdev->dev), 0);
if (!IS_ERR(debugfs_swrm_dent)) {
debugfs_peek = debugfs_create_file("swrm_peek",
S_IFREG | S_IRUGO, debugfs_swrm_dent,
(void *) "swrm_peek", &swrm_debug_ops);
debugfs_poke = debugfs_create_file("swrm_poke",
S_IFREG | S_IRUGO, debugfs_swrm_dent,
(void *) "swrm_poke", &swrm_debug_ops);
debugfs_reg_dump = debugfs_create_file("swrm_reg_dump",
S_IFREG | S_IRUGO, debugfs_swrm_dent,
(void *) "swrm_reg_dump",
&swrm_debug_ops);
}
pm_runtime_set_autosuspend_delay(&pdev->dev, auto_suspend_timer);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
pm_runtime_mark_last_busy(&pdev->dev);
return 0;
err_mstr_fail:
swrm->reg_irq(swrm->handle, swr_mstr_interrupt,
swrm, SWR_IRQ_FREE);
err_irq_fail:
err_pdata_fail:
kfree(swrm);
err_memory_fail:
return ret;
}
static int swrm_remove(struct platform_device *pdev)
{
struct swr_mstr_ctrl *swrm = platform_get_drvdata(pdev);
swrm->reg_irq(swrm->handle, swr_mstr_interrupt,
swrm, SWR_IRQ_FREE);
if (swrm->mstr_port) {
kfree(swrm->mstr_port->port);
kfree(swrm->mstr_port);
}
pm_runtime_disable(&pdev->dev);
pm_runtime_set_suspended(&pdev->dev);
swr_unregister_master(&swrm->master);
mutex_destroy(&swrm->mlock);
kfree(swrm);
return 0;
}
static int swrm_clk_pause(struct swr_mstr_ctrl *swrm)
{
u32 val;
dev_dbg(swrm->dev, "%s: state: %d\n", __func__, swrm->state);
swrm->write(swrm->handle, SWRM_INTERRUPT_MASK_ADDR, 0x1FDFD);
val = swrm->read(swrm->handle, SWRM_MCP_CFG_ADDR);
val |= SWRM_MCP_CFG_BUS_CLK_PAUSE_BMSK;
swrm->write(swrm->handle, SWRM_MCP_CFG_ADDR, val);
swrm->state = SWR_MSTR_PAUSE;
return 0;
}
#ifdef CONFIG_PM_RUNTIME
static int swrm_runtime_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct swr_mstr_ctrl *swrm = platform_get_drvdata(pdev);
int ret = 0;
struct swr_master *mstr = &swrm->master;
struct swr_device *swr_dev;
dev_dbg(dev, "%s: pm_runtime: resume, state:%d\n",
__func__, swrm->state);
mutex_lock(&swrm->reslock);
if ((swrm->state == SWR_MSTR_PAUSE) ||
(swrm->state == SWR_MSTR_DOWN)) {
if (swrm->state == SWR_MSTR_DOWN) {
if (swrm_clk_request(swrm, true))
goto exit;
}
list_for_each_entry(swr_dev, &mstr->devices, dev_list) {
ret = swr_device_up(swr_dev);
if (ret) {
dev_err(dev,
"%s: failed to wakeup swr dev %d\n",
__func__, swr_dev->dev_num);
swrm_clk_request(swrm, false);
goto exit;
}
}
swrm->write(swrm->handle, SWRM_COMP_SW_RESET, 0x01);
swrm->write(swrm->handle, SWRM_COMP_SW_RESET, 0x01);
swrm_master_init(swrm);
}
exit:
pm_runtime_set_autosuspend_delay(&pdev->dev, auto_suspend_timer);
mutex_unlock(&swrm->reslock);
return ret;
}
static int swrm_runtime_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct swr_mstr_ctrl *swrm = platform_get_drvdata(pdev);
int ret = 0;
struct swr_master *mstr = &swrm->master;
struct swr_device *swr_dev;
dev_dbg(dev, "%s: pm_runtime: suspend state: %d\n",
__func__, swrm->state);
mutex_lock(&swrm->reslock);
if ((swrm->state == SWR_MSTR_RESUME) ||
(swrm->state == SWR_MSTR_UP)) {
if (swrm_is_port_en(&swrm->master)) {
dev_dbg(dev, "%s ports are enabled\n", __func__);
ret = -EBUSY;
goto exit;
}
swrm_clk_pause(swrm);
swrm->write(swrm->handle, SWRM_COMP_CFG_ADDR, 0x00);
list_for_each_entry(swr_dev, &mstr->devices, dev_list) {
ret = swr_device_down(swr_dev);
if (ret) {
dev_err(dev,
"%s: failed to shutdown swr dev %d\n",
__func__, swr_dev->dev_num);
goto exit;
}
}
swrm_clk_request(swrm, false);
}
exit:
mutex_unlock(&swrm->reslock);
return ret;
}
#endif /* CONFIG_PM_RUNTIME */
static int swrm_device_down(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct swr_mstr_ctrl *swrm = platform_get_drvdata(pdev);
int ret = 0;
struct swr_master *mstr = &swrm->master;
struct swr_device *swr_dev;
dev_dbg(dev, "%s: swrm state: %d\n", __func__, swrm->state);
mutex_lock(&swrm->reslock);
if ((swrm->state == SWR_MSTR_RESUME) ||
(swrm->state == SWR_MSTR_UP)) {
list_for_each_entry(swr_dev, &mstr->devices, dev_list) {
ret = swr_device_down(swr_dev);
if (ret)
dev_err(dev,
"%s: failed to shutdown swr dev %d\n",
__func__, swr_dev->dev_num);
}
dev_dbg(dev, "%s: Shutting down SWRM\n", __func__);
pm_runtime_disable(dev);
pm_runtime_set_suspended(dev);
pm_runtime_enable(dev);
swrm_clk_request(swrm, false);
}
mutex_unlock(&swrm->reslock);
return ret;
}
/**
* swrm_wcd_notify - parent device can notify to soundwire master through
* this function
* @pdev: pointer to platform device structure
* @id: command id from parent to the soundwire master
* @data: data from parent device to soundwire master
*/
int swrm_wcd_notify(struct platform_device *pdev, u32 id, void *data)
{
struct swr_mstr_ctrl *swrm;
int ret = 0;
struct swr_master *mstr;
struct swr_device *swr_dev;
if (!pdev) {
pr_err("%s: pdev is NULL\n", __func__);
return -EINVAL;
}
swrm = platform_get_drvdata(pdev);
if (!swrm) {
dev_err(&pdev->dev, "%s: swrm is NULL\n", __func__);
return -EINVAL;
}
mstr = &swrm->master;
switch (id) {
case SWR_CH_MAP:
if (!data) {
dev_err(swrm->dev, "%s: data is NULL\n", __func__);
ret = -EINVAL;
} else {
ret = swrm_set_ch_map(swrm, data);
}
break;
case SWR_DEVICE_DOWN:
dev_dbg(swrm->dev, "%s: swr master down called\n", __func__);
mutex_lock(&swrm->mlock);
if ((swrm->state == SWR_MSTR_PAUSE) ||
(swrm->state == SWR_MSTR_DOWN))
dev_dbg(swrm->dev, "%s: SWR master is already Down: %d\n",
__func__, swrm->state);
else
swrm_device_down(&pdev->dev);
mutex_unlock(&swrm->mlock);
break;
case SWR_DEVICE_UP:
dev_dbg(swrm->dev, "%s: swr master up called\n", __func__);
mutex_lock(&swrm->mlock);
if ((swrm->state == SWR_MSTR_RESUME) ||
(swrm->state == SWR_MSTR_UP)) {
dev_dbg(swrm->dev, "%s: SWR master is already UP: %d\n",
__func__, swrm->state);
} else {
pm_runtime_get_sync(&pdev->dev);
list_for_each_entry(swr_dev, &mstr->devices, dev_list) {
ret = swr_reset_device(swr_dev);
if (ret) {
dev_err(swrm->dev,
"%s: failed to reset swr device %d\n",
__func__, swr_dev->dev_num);
swrm_clk_request(swrm, false);
}
}
pm_runtime_mark_last_busy(&pdev->dev);
pm_runtime_put_autosuspend(&pdev->dev);
}
mutex_unlock(&swrm->mlock);
break;
default:
dev_err(swrm->dev, "%s: swr master unknown id %d\n",
__func__, id);
break;
}
return ret;
}
EXPORT_SYMBOL(swrm_wcd_notify);
#ifdef CONFIG_PM_SLEEP
static int swrm_suspend(struct device *dev)
{
int ret = -EBUSY;
struct platform_device *pdev = to_platform_device(dev);
struct swr_mstr_ctrl *swrm = platform_get_drvdata(pdev);
dev_dbg(dev, "%s: system suspend, state: %d\n", __func__, swrm->state);
if (!pm_runtime_enabled(dev) || !pm_runtime_suspended(dev)) {
ret = swrm_runtime_suspend(dev);
if (!ret) {
/*
* Synchronize runtime-pm and system-pm states:
* At this point, we are already suspended. If
* runtime-pm still thinks its active, then
* make sure its status is in sync with HW
* status. The three below calls let the
* runtime-pm know that we are suspended
* already without re-invoking the suspend
* callback
*/
pm_runtime_disable(dev);
pm_runtime_set_suspended(dev);
pm_runtime_enable(dev);
} else {
if (swrm->clk && swrm->handle) {
swrm->clk(swrm->handle, false);
swrm->state = SWR_MSTR_DOWN;
}
}
}
if (ret == -EBUSY) {
/*
* There is a possibility that some audio stream is active
* during suspend. We dont want to return suspend failure in
* that case so that display and relevant components can still
* go to suspend.
* If there is some other error, then it should be passed-on
* to system level suspend
*/
ret = 0;
}
return ret;
}
static int swrm_resume(struct device *dev)
{
int ret = 0;
struct platform_device *pdev = to_platform_device(dev);
struct swr_mstr_ctrl *swrm = platform_get_drvdata(pdev);
dev_dbg(dev, "%s: system resume, state: %d\n", __func__, swrm->state);
if (!pm_runtime_enabled(dev) || !pm_runtime_suspend(dev)) {
if (swrm->clk && swrm->handle &&
swrm->state == SWR_MSTR_DOWN) {
swrm->clk(swrm->handle, true);
swrm->state = SWR_MSTR_UP;
}
ret = swrm_runtime_resume(dev);
if (!ret) {
pm_runtime_mark_last_busy(dev);
pm_request_autosuspend(dev);
}
}
return ret;
}
#endif /* CONFIG_PM_SLEEP */
static const struct dev_pm_ops swrm_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(
swrm_suspend,
swrm_resume
)
SET_RUNTIME_PM_OPS(
swrm_runtime_suspend,
swrm_runtime_resume,
NULL
)
};
static struct of_device_id swrm_dt_match[] = {
{
.compatible = "qcom,swr-wcd",
},
{}
};
static struct platform_driver swr_mstr_driver = {
.probe = swrm_probe,
.remove = swrm_remove,
.driver = {
.name = SWR_WCD_NAME,
.owner = THIS_MODULE,
.pm = &swrm_dev_pm_ops,
.of_match_table = swrm_dt_match,
},
};
static int __init swrm_init(void)
{
return platform_driver_register(&swr_mstr_driver);
}
subsys_initcall(swrm_init);
static void __exit swrm_exit(void)
{
platform_driver_unregister(&swr_mstr_driver);
}
module_exit(swrm_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("WCD SoundWire Controller");
MODULE_ALIAS("platform:swr-wcd");
Reference in a new issue Copy permalink