Google Git
Sign in
android / kernel / msm / android-msm-marlin-3.18-nougat-mr1 / . / drivers / slimbus / slim-msm-ngd.c
blob: cc6558c14d34988aa06dca79ecc05e942096639b [file] [log] [blame]
/* Copyright (c) 2011-2016, 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/dma-mapping.h>
#include <linux/slimbus/slimbus.h>
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_slimbus.h>
#include <linux/timer.h>
#include <linux/msm-sps.h>
#include "slim-msm.h"
#define NGD_SLIM_NAME "ngd_msm_ctrl"
#define SLIM_LA_MGR 0xFF
#define SLIM_ROOT_FREQ 24576000
#define LADDR_RETRY 5
#define NGD_BASE_V1(r) (((r) % 2) ? 0x800 : 0xA00)
#define NGD_BASE_V2(r) (((r) % 2) ? 0x1000 : 0x2000)
#define NGD_BASE(r, v) ((v) ? NGD_BASE_V2(r) : NGD_BASE_V1(r))
/* NGD (Non-ported Generic Device) registers */
enum ngd_reg {
NGD_CFG = 0x0,
NGD_STATUS = 0x4,
NGD_RX_MSGQ_CFG = 0x8,
NGD_INT_EN = 0x10,
NGD_INT_STAT = 0x14,
NGD_INT_CLR = 0x18,
NGD_TX_MSG = 0x30,
NGD_RX_MSG = 0x70,
NGD_IE_STAT = 0xF0,
NGD_VE_STAT = 0x100,
};
enum ngd_msg_cfg {
NGD_CFG_ENABLE = 1,
NGD_CFG_RX_MSGQ_EN = 1 << 1,
NGD_CFG_TX_MSGQ_EN = 1 << 2,
};
enum ngd_intr {
NGD_INT_RECFG_DONE = 1 << 24,
NGD_INT_TX_NACKED_2 = 1 << 25,
NGD_INT_MSG_BUF_CONTE = 1 << 26,
NGD_INT_MSG_TX_INVAL = 1 << 27,
NGD_INT_IE_VE_CHG = 1 << 28,
NGD_INT_DEV_ERR = 1 << 29,
NGD_INT_RX_MSG_RCVD = 1 << 30,
NGD_INT_TX_MSG_SENT = 1 << 31,
};
enum ngd_offsets {
NGD_NACKED_MC = 0x7F00000,
NGD_ACKED_MC = 0xFE000,
NGD_ERROR = 0x1800,
NGD_MSGQ_SUPPORT = 0x400,
NGD_RX_MSGQ_TIME_OUT = 0x16,
NGD_ENUMERATED = 0x1,
NGD_TX_BUSY = 0x0,
};
enum ngd_status {
NGD_LADDR = 1 << 1,
};
static void ngd_slim_rx(struct msm_slim_ctrl *dev, u8 *buf);
static int ngd_slim_runtime_resume(struct device *device);
static int ngd_slim_power_up(struct msm_slim_ctrl *dev, bool mdm_restart);
static void ngd_adsp_down(struct msm_slim_ctrl *dev);
static irqreturn_t ngd_slim_interrupt(int irq, void *d)
{
struct msm_slim_ctrl *dev = (struct msm_slim_ctrl *)d;
void __iomem *ngd = dev->base + NGD_BASE(dev->ctrl.nr, dev->ver);
u32 stat = readl_relaxed(ngd + NGD_INT_STAT);
u32 pstat;
if ((stat & NGD_INT_MSG_BUF_CONTE) ||
(stat & NGD_INT_MSG_TX_INVAL) || (stat & NGD_INT_DEV_ERR) ||
(stat & NGD_INT_TX_NACKED_2)) {
writel_relaxed(stat, ngd + NGD_INT_CLR);
if (stat & NGD_INT_MSG_TX_INVAL)
dev->err = -EINVAL;
else
dev->err = -EIO;
SLIM_WARN(dev, "NGD interrupt error:0x%x, err:%d\n", stat,
dev->err);
/* Guarantee that error interrupts are cleared */
mb();
msm_slim_manage_tx_msgq(dev, false, NULL, dev->err);
} else if (stat & NGD_INT_TX_MSG_SENT) {
writel_relaxed(NGD_INT_TX_MSG_SENT, ngd + NGD_INT_CLR);
/* Make sure interrupt is cleared */
mb();
msm_slim_manage_tx_msgq(dev, false, NULL, 0);
}
if (stat & NGD_INT_RX_MSG_RCVD) {
u32 rx_buf[10];
u8 len, i;
rx_buf[0] = readl_relaxed(ngd + NGD_RX_MSG);
len = rx_buf[0] & 0x1F;
for (i = 1; i < ((len + 3) >> 2); i++) {
rx_buf[i] = readl_relaxed(ngd + NGD_RX_MSG +
(4 * i));
SLIM_DBG(dev, "REG-RX data: %x\n", rx_buf[i]);
}
writel_relaxed(NGD_INT_RX_MSG_RCVD,
ngd + NGD_INT_CLR);
/*
* Guarantee that CLR bit write goes through before
* queuing work
*/
mb();
ngd_slim_rx(dev, (u8 *)rx_buf);
}
if (stat & NGD_INT_RECFG_DONE) {
writel_relaxed(NGD_INT_RECFG_DONE, ngd + NGD_INT_CLR);
/* Guarantee RECONFIG DONE interrupt is cleared */
mb();
/* In satellite mode, just log the reconfig done IRQ */
SLIM_DBG(dev, "reconfig done IRQ for NGD\n");
}
if (stat & NGD_INT_IE_VE_CHG) {
writel_relaxed(NGD_INT_IE_VE_CHG, ngd + NGD_INT_CLR);
/* Guarantee IE VE change interrupt is cleared */
mb();
SLIM_DBG(dev, "NGD IE VE change\n");
}
pstat = readl_relaxed(PGD_THIS_EE(PGD_PORT_INT_ST_EEn, dev->ver));
if (pstat != 0)
return msm_slim_port_irq_handler(dev, pstat);
return IRQ_HANDLED;
}
static int ngd_qmi_available(struct notifier_block *n, unsigned long code,
void *_cmd)
{
struct msm_slim_qmi *qmi = container_of(n, struct msm_slim_qmi, nb);
struct msm_slim_ctrl *dev =
container_of(qmi, struct msm_slim_ctrl, qmi);
SLIM_INFO(dev, "Slimbus QMI NGD CB received event:%ld\n", code);
switch (code) {
case QMI_SERVER_ARRIVE:
schedule_work(&qmi->ssr_up);
break;
default:
break;
}
return 0;
}
static int dsp_ssr_notify_cb(struct notifier_block *n, unsigned long code,
void *_cmd)
{
struct msm_slim_ss *dsp = container_of(n, struct msm_slim_ss, nb);
struct msm_slim_ctrl *dev = container_of(dsp, struct msm_slim_ctrl,
dsp);
switch (code) {
case SUBSYS_BEFORE_SHUTDOWN:
SLIM_INFO(dev, "SLIM DSP SSR notify cb:%lu\n", code);
/* wait for current transaction */
mutex_lock(&dev->tx_lock);
/* make sure autosuspend is not called until ADSP comes up*/
pm_runtime_get_noresume(dev->dev);
dev->state = MSM_CTRL_DOWN;
msm_slim_sps_exit(dev, false);
ngd_adsp_down(dev);
mutex_unlock(&dev->tx_lock);
break;
default:
break;
}
return NOTIFY_DONE;
}
static int mdm_ssr_notify_cb(struct notifier_block *n, unsigned long code,
void *_cmd)
{
void __iomem *ngd;
struct msm_slim_ss *ext_mdm = container_of(n, struct msm_slim_ss, nb);
struct msm_slim_ctrl *dev = container_of(ext_mdm, struct msm_slim_ctrl,
ext_mdm);
struct slim_controller *ctrl = &dev->ctrl;
u32 laddr;
struct slim_device *sbdev;
switch (code) {
case SUBSYS_BEFORE_SHUTDOWN:
SLIM_INFO(dev, "SLIM %lu external_modem SSR notify cb\n", code);
/* vote for runtime-pm so that ADSP doesn't go down */
msm_slim_get_ctrl(dev);
/*
* checking framer here will wake-up ADSP and may avoid framer
* handover later
*/
msm_slim_qmi_check_framer_request(dev);
dev->ext_mdm.state = MSM_CTRL_DOWN;
msm_slim_put_ctrl(dev);
break;
case SUBSYS_AFTER_POWERUP:
if (dev->ext_mdm.state != MSM_CTRL_DOWN)
return NOTIFY_DONE;
SLIM_INFO(dev,
"SLIM %lu external_modem SSR notify cb\n", code);
/* vote for runtime-pm so that ADSP doesn't go down */
msm_slim_get_ctrl(dev);
msm_slim_qmi_check_framer_request(dev);
/* If NGD enumeration is lost, we will need to power us up */
ngd = dev->base + NGD_BASE(dev->ctrl.nr, dev->ver);
laddr = readl_relaxed(ngd + NGD_STATUS);
if (!(laddr & NGD_LADDR)) {
mutex_lock(&dev->tx_lock);
/* runtime-pm state should be consistent with HW */
pm_runtime_disable(dev->dev);
pm_runtime_set_suspended(dev->dev);
dev->state = MSM_CTRL_DOWN;
mutex_unlock(&dev->tx_lock);
SLIM_INFO(dev,
"SLIM MDM SSR (active framer on MDM) dev-down\n");
list_for_each_entry(sbdev, &ctrl->devs, dev_list)
slim_report_absent(sbdev);
ngd_slim_runtime_resume(dev->dev);
pm_runtime_set_active(dev->dev);
pm_runtime_enable(dev->dev);
}
dev->ext_mdm.state = MSM_CTRL_AWAKE;
msm_slim_put_ctrl(dev);
break;
default:
break;
}
return NOTIFY_DONE;
}
static int ngd_get_tid(struct slim_controller *ctrl, struct slim_msg_txn *txn,
u8 *tid, struct completion *done)
{
struct msm_slim_ctrl *dev = slim_get_ctrldata(ctrl);
unsigned long flags;
spin_lock_irqsave(&ctrl->txn_lock, flags);
if (ctrl->last_tid <= 255) {
dev->msg_cnt = ctrl->last_tid;
ctrl->last_tid++;
} else {
int i;
for (i = 0; i < 256; i++) {
dev->msg_cnt = ((dev->msg_cnt + 1) & 0xFF);
if (ctrl->txnt[dev->msg_cnt] == NULL)
break;
}
if (i >= 256) {
dev_err(&ctrl->dev, "out of TID");
spin_unlock_irqrestore(&ctrl->txn_lock, flags);
return -ENOMEM;
}
}
ctrl->txnt[dev->msg_cnt] = txn;
txn->tid = dev->msg_cnt;
txn->comp = done;
*tid = dev->msg_cnt;
spin_unlock_irqrestore(&ctrl->txn_lock, flags);
return 0;
}
static void slim_reinit_tx_msgq(struct msm_slim_ctrl *dev)
{
/*
* disconnect/recoonect pipe so that subsequent
* transactions don't timeout due to unavailable
* descriptors
*/
if (dev->state != MSM_CTRL_DOWN) {
msm_slim_disconnect_endp(dev, &dev->tx_msgq,
&dev->use_tx_msgqs);
msm_slim_connect_endp(dev, &dev->tx_msgq);
}
}
static int ngd_xfer_msg(struct slim_controller *ctrl, struct slim_msg_txn *txn)
{
DECLARE_COMPLETION_ONSTACK(done);
DECLARE_COMPLETION_ONSTACK(tx_sent);
struct msm_slim_ctrl *dev = slim_get_ctrldata(ctrl);
u32 *pbuf;
u8 *puc;
int ret = 0;
u8 la = txn->la;
u8 txn_mt;
u16 txn_mc = txn->mc;
u8 wbuf[SLIM_MSGQ_BUF_LEN] = {0}; //HTC_AUD klockwork ID: 8061
bool report_sat = false;
bool sync_wr = true;
if (txn->mc & SLIM_MSG_CLK_PAUSE_SEQ_FLG)
return -EPROTONOSUPPORT;
if (txn->mt == SLIM_MSG_MT_CORE &&
(txn->mc >= SLIM_MSG_MC_BEGIN_RECONFIGURATION &&
txn->mc <= SLIM_MSG_MC_RECONFIGURE_NOW))
return 0;
if (txn->mc == SLIM_USR_MC_REPORT_SATELLITE &&
txn->mt == SLIM_MSG_MT_SRC_REFERRED_USER)
report_sat = true;
else
mutex_lock(&dev->tx_lock);
if (!report_sat && !pm_runtime_enabled(dev->dev) &&
dev->state == MSM_CTRL_ASLEEP) {
/*
* Counter-part of system-suspend when runtime-pm is not enabled
* This way, resume can be left empty and device will be put in
* active mode only if client requests anything on the bus
* If the state was DOWN, SSR UP notification will take
* care of putting the device in active state.
*/
mutex_unlock(&dev->tx_lock);
ret = ngd_slim_runtime_resume(dev->dev);
if (ret) {
SLIM_ERR(dev, "slim resume failed ret:%d, state:%d",
ret, dev->state);
return -EREMOTEIO;
}
mutex_lock(&dev->tx_lock);
}
/* If txn is tried when controller is down, wait for ADSP to boot */
if (!report_sat) {
if (dev->state == MSM_CTRL_DOWN) {
u8 mc = (u8)txn->mc;
int timeout;
mutex_unlock(&dev->tx_lock);
SLIM_INFO(dev, "ADSP slimbus not up yet\n");
/*
* Messages related to data channel management can't
* wait since they are holding reconfiguration lock.
* clk_pause in resume (which can change state back to
* MSM_CTRL_AWAKE), will need that lock.
* Port disconnection, channel removal calls should pass
* through since there is no activity on the bus and
* those calls are triggered by clients due to
* device_down callback in that situation.
* Returning 0 on the disconnections and
* removals will ensure consistent state of channels,
* ports with the HW
* Remote requests to remove channel/port will be
* returned from the path where they wait on
* acknowledgement from ADSP
*/
if ((txn->mt == SLIM_MSG_MT_DEST_REFERRED_USER) &&
((mc == SLIM_USR_MC_CHAN_CTRL ||
mc == SLIM_USR_MC_DISCONNECT_PORT ||
mc == SLIM_USR_MC_RECONFIG_NOW)))
return -EREMOTEIO;
if ((txn->mt == SLIM_MSG_MT_CORE) &&
((mc == SLIM_MSG_MC_DISCONNECT_PORT ||
mc == SLIM_MSG_MC_NEXT_REMOVE_CHANNEL ||
mc == SLIM_USR_MC_RECONFIG_NOW)))
return 0;
if ((txn->mt == SLIM_MSG_MT_CORE) &&
((mc >= SLIM_MSG_MC_CONNECT_SOURCE &&
mc <= SLIM_MSG_MC_CHANGE_CONTENT) ||
(mc >= SLIM_MSG_MC_BEGIN_RECONFIGURATION &&
mc <= SLIM_MSG_MC_RECONFIGURE_NOW)))
return -EREMOTEIO;
if ((txn->mt == SLIM_MSG_MT_DEST_REFERRED_USER) &&
((mc >= SLIM_USR_MC_DEFINE_CHAN &&
mc < SLIM_USR_MC_DISCONNECT_PORT)))
return -EREMOTEIO;
timeout = wait_for_completion_timeout(&dev->ctrl_up,
HZ);
if (!timeout)
return -ETIMEDOUT;
mutex_lock(&dev->tx_lock);
}
mutex_unlock(&dev->tx_lock);
ret = msm_slim_get_ctrl(dev);
mutex_lock(&dev->tx_lock);
/*
* Runtime-pm's callbacks are not called until runtime-pm's
* error status is cleared
* Setting runtime status to suspended clears the error
* It also makes HW status cosistent with what SW has it here
*/
if ((pm_runtime_enabled(dev->dev) && ret < 0) ||
dev->state >= MSM_CTRL_ASLEEP) {
SLIM_ERR(dev, "slim ctrl vote failed ret:%d, state:%d",
ret, dev->state);
pm_runtime_set_suspended(dev->dev);
mutex_unlock(&dev->tx_lock);
msm_slim_put_ctrl(dev);
return -EREMOTEIO;
}
}
if (txn->mt == SLIM_MSG_MT_CORE &&
(txn->mc == SLIM_MSG_MC_CONNECT_SOURCE ||
txn->mc == SLIM_MSG_MC_CONNECT_SINK ||
txn->mc == SLIM_MSG_MC_DISCONNECT_PORT)) {
int i = 0;
if (txn->mc != SLIM_MSG_MC_DISCONNECT_PORT)
SLIM_INFO(dev,
"Connect port: laddr 0x%x port_num %d chan_num %d\n",
txn->la, txn->wbuf[0], txn->wbuf[1]);
else
SLIM_INFO(dev,
"Disconnect port: laddr 0x%x port_num %d\n",
txn->la, txn->wbuf[0]);
txn->mt = SLIM_MSG_MT_DEST_REFERRED_USER;
if (txn->mc == SLIM_MSG_MC_CONNECT_SOURCE)
txn->mc = SLIM_USR_MC_CONNECT_SRC;
else if (txn->mc == SLIM_MSG_MC_CONNECT_SINK)
txn->mc = SLIM_USR_MC_CONNECT_SINK;
else if (txn->mc == SLIM_MSG_MC_DISCONNECT_PORT)
txn->mc = SLIM_USR_MC_DISCONNECT_PORT;
if (txn->la == SLIM_LA_MGR) {
if (dev->pgdla == SLIM_LA_MGR) {
u8 ea[] = {0, QC_DEVID_PGD, 0, 0, QC_MFGID_MSB,
QC_MFGID_LSB};
ea[2] = (u8)(dev->pdata.eapc & 0xFF);
ea[3] = (u8)((dev->pdata.eapc & 0xFF00) >> 8);
mutex_unlock(&dev->tx_lock);
ret = dev->ctrl.get_laddr(&dev->ctrl, ea, 6,
&dev->pgdla);
SLIM_DBG(dev, "SLIM PGD LA:0x%x, ret:%d\n",
dev->pgdla, ret);
if (ret) {
SLIM_ERR(dev,
"Incorrect SLIM-PGD EAPC:0x%x\n",
dev->pdata.eapc);
return ret;
}
mutex_lock(&dev->tx_lock);
}
txn->la = dev->pgdla;
}
wbuf[i++] = txn->la;
la = SLIM_LA_MGR;
wbuf[i++] = txn->wbuf[0];
if (txn->mc != SLIM_USR_MC_DISCONNECT_PORT)
wbuf[i++] = txn->wbuf[1];
ret = ngd_get_tid(ctrl, txn, &wbuf[i++], &done);
if (ret) {
SLIM_ERR(dev, "TID for connect/disconnect fail:%d\n",
ret);
goto ngd_xfer_err;
}
txn->len = i;
txn->wbuf = wbuf;
txn->rl = txn->len + 4;
}
txn->rl--;
if (txn->len > SLIM_MSGQ_BUF_LEN || txn->rl > SLIM_MSGQ_BUF_LEN) {
SLIM_WARN(dev, "msg exeeds HW lim:%d, rl:%d, mc:0x%x, mt:0x%x",
txn->len, txn->rl, txn->mc, txn->mt);
ret = -EDQUOT;
goto ngd_xfer_err;
}
if (txn->mt == SLIM_MSG_MT_CORE && txn->comp &&
dev->use_tx_msgqs == MSM_MSGQ_ENABLED &&
(txn_mc != SLIM_MSG_MC_REQUEST_INFORMATION &&
txn_mc != SLIM_MSG_MC_REQUEST_VALUE &&
txn_mc != SLIM_MSG_MC_REQUEST_CHANGE_VALUE &&
txn_mc != SLIM_MSG_MC_REQUEST_CLEAR_INFORMATION)) {
sync_wr = false;
pbuf = msm_get_msg_buf(dev, txn->rl, txn->comp);
} else if (txn->mt == SLIM_MSG_MT_DEST_REFERRED_USER &&
dev->use_tx_msgqs == MSM_MSGQ_ENABLED &&
txn->mc == SLIM_USR_MC_REPEAT_CHANGE_VALUE &&
txn->comp) {
sync_wr = false;
pbuf = msm_get_msg_buf(dev, txn->rl, txn->comp);
} else {
pbuf = msm_get_msg_buf(dev, txn->rl, &tx_sent);
}
if (!pbuf) {
SLIM_ERR(dev, "Message buffer unavailable\n");
ret = -ENOMEM;
goto ngd_xfer_err;
}
dev->err = 0;
if (txn->dt == SLIM_MSG_DEST_ENUMADDR) {
ret = -EPROTONOSUPPORT;
goto ngd_xfer_err;
}
if (txn->dt == SLIM_MSG_DEST_LOGICALADDR)
*pbuf = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt, txn->mc, 0,
la);
else
*pbuf = SLIM_MSG_ASM_FIRST_WORD(txn->rl, txn->mt, txn->mc, 1,
la);
if (txn->dt == SLIM_MSG_DEST_LOGICALADDR)
puc = ((u8 *)pbuf) + 3;
else
puc = ((u8 *)pbuf) + 2;
if (txn->rbuf)
*(puc++) = txn->tid;
if (((txn->mt == SLIM_MSG_MT_CORE) &&
((txn->mc >= SLIM_MSG_MC_REQUEST_INFORMATION &&
txn->mc <= SLIM_MSG_MC_REPORT_INFORMATION) ||
(txn->mc >= SLIM_MSG_MC_REQUEST_VALUE &&
txn->mc <= SLIM_MSG_MC_CHANGE_VALUE))) ||
(txn->mc == SLIM_USR_MC_REPEAT_CHANGE_VALUE &&
txn->mt == SLIM_MSG_MT_DEST_REFERRED_USER)) {
*(puc++) = (txn->ec & 0xFF);
*(puc++) = (txn->ec >> 8)&0xFF;
}
if (txn->wbuf)
memcpy(puc, txn->wbuf, txn->len);
if (txn->mt == SLIM_MSG_MT_DEST_REFERRED_USER &&
(txn->mc == SLIM_USR_MC_CONNECT_SRC ||
txn->mc == SLIM_USR_MC_CONNECT_SINK ||
txn->mc == SLIM_USR_MC_DISCONNECT_PORT) && txn->wbuf &&
wbuf[0] == dev->pgdla) {
if (txn->mc != SLIM_USR_MC_DISCONNECT_PORT)
dev->err = msm_slim_connect_pipe_port(dev, wbuf[1]);
else
writel_relaxed(0, PGD_PORT(PGD_PORT_CFGn,
(dev->pipes[wbuf[1]].port_b),
dev->ver));
if (dev->err) {
SLIM_ERR(dev, "pipe-port connect err:%d\n", dev->err);
goto ngd_xfer_err;
}
/* Add port-base to port number if this is manager side port */
puc[1] = (u8)dev->pipes[wbuf[1]].port_b;
}
dev->err = 0;
/*
* If it's a read txn, it may be freed if a response is received by
* received thread before reaching end of this function.
* mc, mt may have changed to convert standard slimbus code/type to
* satellite user-defined message. Reinitialize again
*/
txn_mc = txn->mc;
txn_mt = txn->mt;
ret = msm_send_msg_buf(dev, pbuf, txn->rl,
NGD_BASE(dev->ctrl.nr, dev->ver) + NGD_TX_MSG);
if (!ret && sync_wr) {
int i;
int timeout = wait_for_completion_timeout(&tx_sent, HZ);
if (!timeout && dev->use_tx_msgqs == MSM_MSGQ_ENABLED) {
struct msm_slim_endp *endpoint = &dev->tx_msgq;
struct sps_mem_buffer *mem = &endpoint->buf;
u32 idx = (u32) (((u8 *)pbuf - (u8 *)mem->base) /
SLIM_MSGQ_BUF_LEN);
phys_addr_t addr = mem->phys_base +
(idx * SLIM_MSGQ_BUF_LEN);
ret = -ETIMEDOUT;
SLIM_WARN(dev, "timeout, BAM desc_idx:%d, phys:%llx",
idx, (u64)addr);
for (i = 0; i < (SLIM_MSGQ_BUF_LEN >> 2) ; i++)
SLIM_WARN(dev, "timeout:bam-desc[%d]:0x%x",
i, *(pbuf + i));
if (idx < MSM_TX_BUFS)
dev->wr_comp[idx] = NULL;
slim_reinit_tx_msgq(dev);
} else if (!timeout) {
ret = -ETIMEDOUT;
SLIM_WARN(dev, "timeout non-BAM TX,len:%d", txn->rl);
for (i = 0; i < (SLIM_MSGQ_BUF_LEN >> 2) ; i++)
SLIM_WARN(dev, "timeout:txbuf[%d]:0x%x", i,
dev->tx_buf[i]);
} else {
ret = dev->err;
}
}
if (ret) {
u32 conf, stat, rx_msgq, int_stat, int_en, int_clr;
void __iomem *ngd = dev->base + NGD_BASE(dev->ctrl.nr,
dev->ver);
SLIM_WARN(dev, "TX failed :MC:0x%x,mt:0x%x, ret:%d, ver:%d\n",
txn_mc, txn_mt, ret, dev->ver);
conf = readl_relaxed(ngd);
stat = readl_relaxed(ngd + NGD_STATUS);
rx_msgq = readl_relaxed(ngd + NGD_RX_MSGQ_CFG);
int_stat = readl_relaxed(ngd + NGD_INT_STAT);
int_en = readl_relaxed(ngd + NGD_INT_EN);
int_clr = readl_relaxed(ngd + NGD_INT_CLR);
SLIM_WARN(dev, "conf:0x%x,stat:0x%x,rxmsgq:0x%x\n",
conf, stat, rx_msgq);
SLIM_ERR(dev, "int_stat:0x%x,int_en:0x%x,int_cll:0x%x\n",
int_stat, int_en, int_clr);
}
if (txn_mt == SLIM_MSG_MT_DEST_REFERRED_USER &&
(txn_mc == SLIM_USR_MC_CONNECT_SRC ||
txn_mc == SLIM_USR_MC_CONNECT_SINK ||
txn_mc == SLIM_USR_MC_DISCONNECT_PORT)) {
int timeout;
unsigned long flags;
mutex_unlock(&dev->tx_lock);
msm_slim_put_ctrl(dev);
if (!ret) {
timeout = wait_for_completion_timeout(txn->comp, HZ);
/* remote side did not acknowledge */
if (!timeout)
ret = -EREMOTEIO;
else
ret = txn->ec;
}
if (ret) {
SLIM_ERR(dev,
"connect/disconnect:0x%x,tid:%d err:%d\n",
txn->mc, txn->tid, ret);
spin_lock_irqsave(&ctrl->txn_lock, flags);
ctrl->txnt[txn->tid] = NULL;
spin_unlock_irqrestore(&ctrl->txn_lock, flags);
}
return ret ? ret : dev->err;
}
ngd_xfer_err:
if (!report_sat) {
mutex_unlock(&dev->tx_lock);
msm_slim_put_ctrl(dev);
}
return ret ? ret : dev->err;
}
static int ngd_get_ec(u16 start_offset, u8 len, u16 *ec)
{
if (len > SLIM_MAX_VE_SLC_BYTES ||
start_offset > MSM_SLIM_VE_MAX_MAP_ADDR)
return -EINVAL;
if (len <= 4) {
*ec = len - 1;
} else if (len <= 8) {
if (len & 0x1)
return -EINVAL;
*ec = ((len >> 1) + 1);
} else {
if (len & 0x3)
return -EINVAL;
*ec = ((len >> 2) + 3);
}
*ec |= (0x8 | ((start_offset & 0xF) << 4));
*ec |= ((start_offset & 0xFF0) << 4);
return 0;
}
static int ngd_user_msg(struct slim_controller *ctrl, u8 la, u8 mt, u8 mc,
struct slim_ele_access *msg, u8 *buf, u8 len)
{
int ret;
struct slim_msg_txn txn;
if (mt != SLIM_MSG_MT_DEST_REFERRED_USER ||
mc != SLIM_USR_MC_REPEAT_CHANGE_VALUE) {
return -EPROTONOSUPPORT;
}
ret = ngd_get_ec(msg->start_offset, len, &txn.ec);
if (ret)
return ret;
txn.la = la;
txn.mt = mt;
txn.mc = mc;
txn.dt = SLIM_MSG_DEST_LOGICALADDR;
txn.len = len;
txn.rl = len + 6;
txn.wbuf = buf;
txn.rbuf = NULL;
txn.comp = msg->comp;
return ngd_xfer_msg(ctrl, &txn);
}
static int ngd_bulk_cb(void *ctx, int err)
{
if (ctx)
complete(ctx);
return err;
}
static int ngd_bulk_wr(struct slim_controller *ctrl, u8 la, u8 mt, u8 mc,
struct slim_val_inf msgs[], int n,
int (*comp_cb)(void *ctx, int err), void *ctx)
{
struct msm_slim_ctrl *dev = slim_get_ctrldata(ctrl);
int i, ret;
struct msm_slim_endp *endpoint = &dev->tx_msgq;
u32 *header;
DECLARE_COMPLETION_ONSTACK(done);
ret = msm_slim_get_ctrl(dev);
mutex_lock(&dev->tx_lock);
if ((pm_runtime_enabled(dev->dev) && ret < 0) ||
dev->state >= MSM_CTRL_ASLEEP) {
SLIM_WARN(dev, "vote failed/SSR in-progress ret:%d, state:%d",
ret, dev->state);
pm_runtime_set_suspended(dev->dev);
mutex_unlock(&dev->tx_lock);
msm_slim_put_ctrl(dev);
return -EREMOTEIO;
}
if (!pm_runtime_enabled(dev->dev) && dev->state == MSM_CTRL_ASLEEP) {
mutex_unlock(&dev->tx_lock);
ret = ngd_slim_runtime_resume(dev->dev);
if (ret) {
SLIM_ERR(dev, "slim resume failed ret:%d, state:%d",
ret, dev->state);
return -EREMOTEIO;
}
mutex_lock(&dev->tx_lock);
}
if (dev->use_tx_msgqs != MSM_MSGQ_ENABLED) {
SLIM_WARN(dev, "bulk wr not supported");
ret = -EPROTONOSUPPORT;
goto retpath;
}
if (dev->bulk.in_progress) {
SLIM_WARN(dev, "bulk wr in progress:");
ret = -EAGAIN;
goto retpath;
}
dev->bulk.in_progress = true;
/* every txn has 5 bytes of overhead: la, mc, mt, ec, len */
dev->bulk.size = n * 5;
for (i = 0; i < n; i++) {
dev->bulk.size += msgs[i].num_bytes;
dev->bulk.size += (4 - ((msgs[i].num_bytes + 1) & 0x3));
}
if (dev->bulk.size > 0xffff) {
SLIM_WARN(dev, "len exceeds limit, split bulk and retry");
ret = -EDQUOT;
goto retpath;
}
if (dev->bulk.size > dev->bulk.buf_sz) {
void *temp = krealloc(dev->bulk.base, dev->bulk.size,
GFP_KERNEL);
if (!temp) {
ret = -ENOMEM;
goto retpath;
}
dev->bulk.base = temp;
dev->bulk.buf_sz = dev->bulk.size;
}
header = dev->bulk.base;
for (i = 0; i < n; i++) {
u8 *buf = (u8 *)header;
int rl = msgs[i].num_bytes + 5;
u16 ec;
*header = SLIM_MSG_ASM_FIRST_WORD(rl, mt, mc, 0, la);
buf += 3;
ret = ngd_get_ec(msgs[i].start_offset, msgs[i].num_bytes, &ec);
if (ret)
goto retpath;
*(buf++) = (ec & 0xFF);
*(buf++) = (ec >> 8) & 0xFF;
memcpy(buf, msgs[i].wbuf, msgs[i].num_bytes);
buf += msgs[i].num_bytes;
header += (rl >> 2);
if (rl & 3) {
header++;
memset(buf, 0, ((u8 *)header - buf));
}
}
header = dev->bulk.base;
if (comp_cb) {
dev->bulk.cb = comp_cb;
dev->bulk.ctx = ctx;
} else {
dev->bulk.cb = ngd_bulk_cb;
dev->bulk.ctx = &done;
}
dev->bulk.wr_dma = dma_map_single(dev->dev, dev->bulk.base,
dev->bulk.size, DMA_TO_DEVICE);
if (dma_mapping_error(dev->dev, dev->bulk.wr_dma)) {
ret = -ENOMEM;
goto retpath;
}
ret = sps_transfer_one(endpoint->sps, dev->bulk.wr_dma, dev->bulk.size,
NULL, SPS_IOVEC_FLAG_EOT);
if (ret) {
SLIM_WARN(dev, "sps transfer one returned error:%d", ret);
goto retpath;
}
if (dev->bulk.cb == ngd_bulk_cb) {
int timeout = wait_for_completion_timeout(&done, HZ);
if (!timeout) {
SLIM_WARN(dev, "timeout for bulk wr");
dma_unmap_single(dev->dev, dev->bulk.wr_dma,
dev->bulk.size, DMA_TO_DEVICE);
ret = -ETIMEDOUT;
}
}
retpath:
if (ret) {
dev->bulk.in_progress = false;
dev->bulk.ctx = NULL;
dev->bulk.wr_dma = 0;
slim_reinit_tx_msgq(dev);
}
mutex_unlock(&dev->tx_lock);
msm_slim_put_ctrl(dev);
return ret;
}
static int ngd_xferandwait_ack(struct slim_controller *ctrl,
struct slim_msg_txn *txn)
{
struct msm_slim_ctrl *dev = slim_get_ctrldata(ctrl);
unsigned long flags;
int ret;
if (dev->state == MSM_CTRL_DOWN) {
/*
* no need to send anything to the bus due to SSR
* transactions related to channel removal marked as success
* since HW is down
*/
if ((txn->mt == SLIM_MSG_MT_DEST_REFERRED_USER) &&
((txn->mc >= SLIM_USR_MC_CHAN_CTRL &&
txn->mc <= SLIM_USR_MC_REQ_BW) ||
txn->mc == SLIM_USR_MC_DISCONNECT_PORT)) {
spin_lock_irqsave(&ctrl->txn_lock, flags);
ctrl->txnt[txn->tid] = NULL;
spin_unlock_irqrestore(&ctrl->txn_lock, flags);
return 0;
}
}
ret = ngd_xfer_msg(ctrl, txn);
if (!ret) {
int timeout;
timeout = wait_for_completion_timeout(txn->comp, HZ);
if (!timeout)
ret = -ETIMEDOUT;
else
ret = txn->ec;
}
if (ret) {
if (ret != -EREMOTEIO || txn->mc != SLIM_USR_MC_CHAN_CTRL)
SLIM_ERR(dev, "master msg:0x%x,tid:%d ret:%d\n",
txn->mc, txn->tid, ret);
spin_lock_irqsave(&ctrl->txn_lock, flags);
ctrl->txnt[txn->tid] = NULL;
spin_unlock_irqrestore(&ctrl->txn_lock, flags);
}
return ret;
}
static int ngd_allocbw(struct slim_device *sb, int *subfrmc, int *clkgear)
{
int ret = 0, num_chan = 0;
struct slim_pending_ch *pch;
struct slim_msg_txn txn;
struct slim_controller *ctrl = sb->ctrl;
DECLARE_COMPLETION_ONSTACK(done);
u8 wbuf[SLIM_MSGQ_BUF_LEN];
struct msm_slim_ctrl *dev = slim_get_ctrldata(ctrl);
*clkgear = ctrl->clkgear;
*subfrmc = 0;
txn.mt = SLIM_MSG_MT_DEST_REFERRED_USER;
txn.dt = SLIM_MSG_DEST_LOGICALADDR;
txn.la = SLIM_LA_MGR;
txn.len = 0;
txn.ec = 0;
txn.wbuf = wbuf;
txn.rbuf = NULL;
if (ctrl->sched.msgsl != ctrl->sched.pending_msgsl) {
SLIM_DBG(dev, "slim reserve BW for messaging: req: %d\n",
ctrl->sched.pending_msgsl);
txn.mc = SLIM_USR_MC_REQ_BW;
wbuf[txn.len++] = ((sb->laddr & 0x1f) |
((u8)(ctrl->sched.pending_msgsl & 0x7) << 5));
wbuf[txn.len++] = (u8)(ctrl->sched.pending_msgsl >> 3);
ret = ngd_get_tid(ctrl, &txn, &wbuf[txn.len++], &done);
if (ret)
return ret;
txn.rl = txn.len + 4;
ret = ngd_xferandwait_ack(ctrl, &txn);
if (ret)
return ret;
txn.mc = SLIM_USR_MC_RECONFIG_NOW;
txn.len = 2;
wbuf[1] = sb->laddr;
txn.rl = txn.len + 4;
ret = ngd_get_tid(ctrl, &txn, &wbuf[0], &done);
if (ret)
return ret;
ret = ngd_xferandwait_ack(ctrl, &txn);
if (ret)
return ret;
txn.len = 0;
}
list_for_each_entry(pch, &sb->mark_define, pending) {
struct slim_ich *slc;
slc = &ctrl->chans[pch->chan];
if (!slc) {
SLIM_WARN(dev, "no channel in define?\n");
return -ENXIO;
}
if (txn.len == 0) {
/* Per protocol, only last 5 bits for client no. */
wbuf[txn.len++] = (u8) (slc->prop.dataf << 5) |
(sb->laddr & 0x1f);
wbuf[txn.len] = slc->prop.sampleszbits >> 2;
if (slc->srch && slc->prop.prot == SLIM_PUSH)
slc->prop.prot = SLIM_PULL;
if (slc->coeff == SLIM_COEFF_3)
wbuf[txn.len] |= 1 << 5;
wbuf[txn.len++] |= slc->prop.auxf << 6;
wbuf[txn.len++] = slc->rootexp << 4 | slc->prop.prot;
wbuf[txn.len++] = slc->prrate;
ret = ngd_get_tid(ctrl, &txn, &wbuf[txn.len++], &done);
if (ret) {
SLIM_WARN(dev, "no tid for channel define?\n");
return -ENXIO;
}
}
num_chan++;
wbuf[txn.len++] = slc->chan;
SLIM_INFO(dev, "slim activate chan:%d, laddr: 0x%x\n",
slc->chan, sb->laddr);
}
if (txn.len) {
txn.mc = SLIM_USR_MC_DEF_ACT_CHAN;
txn.rl = txn.len + 4;
ret = ngd_xferandwait_ack(ctrl, &txn);
if (ret)
return ret;
txn.mc = SLIM_USR_MC_RECONFIG_NOW;
txn.len = 2;
wbuf[1] = sb->laddr;
txn.rl = txn.len + 4;
ret = ngd_get_tid(ctrl, &txn, &wbuf[0], &done);
if (ret)
return ret;
ret = ngd_xferandwait_ack(ctrl, &txn);
if (ret)
return ret;
}
txn.len = 0;
list_for_each_entry(pch, &sb->mark_removal, pending) {
struct slim_ich *slc;
slc = &ctrl->chans[pch->chan];
if (!slc) {
SLIM_WARN(dev, "no channel in removal?\n");
return -ENXIO;
}
if (txn.len == 0) {
/* Per protocol, only last 5 bits for client no. */
wbuf[txn.len++] = (u8) (SLIM_CH_REMOVE << 6) |
(sb->laddr & 0x1f);
ret = ngd_get_tid(ctrl, &txn, &wbuf[txn.len++], &done);
if (ret) {
SLIM_WARN(dev, "no tid for channel define?\n");
return -ENXIO;
}
}
wbuf[txn.len++] = slc->chan;
SLIM_INFO(dev, "slim remove chan:%d, laddr: 0x%x\n",
slc->chan, sb->laddr);
}
if (txn.len) {
txn.mc = SLIM_USR_MC_CHAN_CTRL;
txn.rl = txn.len + 4;
ret = ngd_xferandwait_ack(ctrl, &txn);
/* HW restarting, channel removal should succeed */
if (ret == -EREMOTEIO)
return 0;
else if (ret)
return ret;
txn.mc = SLIM_USR_MC_RECONFIG_NOW;
txn.len = 2;
wbuf[1] = sb->laddr;
txn.rl = txn.len + 4;
ret = ngd_get_tid(ctrl, &txn, &wbuf[0], &done);
if (ret)
return ret;
ret = ngd_xferandwait_ack(ctrl, &txn);
if (ret)
return ret;
txn.len = 0;
}
return 0;
}
static int ngd_set_laddr(struct slim_controller *ctrl, const u8 *ea,
u8 elen, u8 laddr)
{
return 0;
}
static int ngd_get_laddr(struct slim_controller *ctrl, const u8 *ea,
u8 elen, u8 *laddr)
{
int ret;
u8 wbuf[10];
struct slim_msg_txn txn;
DECLARE_COMPLETION_ONSTACK(done);
txn.mt = SLIM_MSG_MT_DEST_REFERRED_USER;
txn.dt = SLIM_MSG_DEST_LOGICALADDR;
txn.la = SLIM_LA_MGR;
txn.ec = 0;
ret = ngd_get_tid(ctrl, &txn, &wbuf[0], &done);
if (ret) {
return ret;
}
memcpy(&wbuf[1], ea, elen);
txn.mc = SLIM_USR_MC_ADDR_QUERY;
txn.rl = 11;
txn.len = 7;
txn.wbuf = wbuf;
txn.rbuf = NULL;
ret = ngd_xferandwait_ack(ctrl, &txn);
if (!ret && txn.la == 0xFF)
ret = -ENXIO;
else if (!ret)
*laddr = txn.la;
return ret;
}
static void ngd_slim_setup(struct msm_slim_ctrl *dev)
{
u32 cfg = readl_relaxed(dev->base +
NGD_BASE(dev->ctrl.nr, dev->ver));
if (dev->state == MSM_CTRL_DOWN) {
/* if called after SSR, cleanup and re-assign */
if (dev->use_tx_msgqs != MSM_MSGQ_RESET)
msm_slim_deinit_ep(dev, &dev->tx_msgq,
&dev->use_tx_msgqs);
if (dev->use_rx_msgqs != MSM_MSGQ_RESET)
msm_slim_deinit_ep(dev, &dev->rx_msgq,
&dev->use_rx_msgqs);
msm_slim_sps_init(dev, dev->bam_mem,
NGD_BASE(dev->ctrl.nr,
dev->ver) + NGD_STATUS, true);
} else {
if (dev->use_rx_msgqs == MSM_MSGQ_DISABLED)
goto setup_tx_msg_path;
if (cfg & NGD_CFG_RX_MSGQ_EN) {
SLIM_WARN(dev, "RX msgq status HW:0x%x, SW:%d:", cfg,
dev->use_rx_msgqs);
goto setup_tx_msg_path;
}
if (dev->use_rx_msgqs == MSM_MSGQ_ENABLED)
msm_slim_disconnect_endp(dev, &dev->rx_msgq,
&dev->use_rx_msgqs);
msm_slim_connect_endp(dev, &dev->rx_msgq);
setup_tx_msg_path:
if (dev->use_tx_msgqs == MSM_MSGQ_DISABLED)
goto ngd_enable;
if (cfg & NGD_CFG_TX_MSGQ_EN) {
SLIM_WARN(dev, "TX msgq status HW:0x%x, SW:%d:", cfg,
dev->use_tx_msgqs);
goto ngd_enable;
}
if (dev->use_tx_msgqs == MSM_MSGQ_ENABLED)
msm_slim_disconnect_endp(dev, &dev->tx_msgq,
&dev->use_tx_msgqs);
msm_slim_connect_endp(dev, &dev->tx_msgq);
}
ngd_enable:
if (dev->use_rx_msgqs == MSM_MSGQ_ENABLED)
cfg |= NGD_CFG_RX_MSGQ_EN;
if (dev->use_tx_msgqs == MSM_MSGQ_ENABLED)
cfg |= NGD_CFG_TX_MSGQ_EN;
/* Enable NGD if it's not already enabled*/
if (!(cfg & NGD_CFG_ENABLE))
cfg |= NGD_CFG_ENABLE;
writel_relaxed(cfg, dev->base + NGD_BASE(dev->ctrl.nr, dev->ver));
/* make sure NGD MSG-Q config goes through */
mb();
}
static void ngd_slim_rx(struct msm_slim_ctrl *dev, u8 *buf)
{
unsigned long flags;
u8 mc, mt, len;
len = buf[0] & 0x1F;
mt = (buf[0] >> 5) & 0x7;
mc = buf[1];
if (mc == SLIM_USR_MC_MASTER_CAPABILITY &&
mt == SLIM_MSG_MT_SRC_REFERRED_USER)
complete(&dev->rx_msgq_notify);
if (mc == SLIM_MSG_MC_REPLY_INFORMATION ||
mc == SLIM_MSG_MC_REPLY_VALUE) {
u8 tid = buf[3];
dev_dbg(dev->dev, "tid:%d, len:%d\n", tid, len);
slim_msg_response(&dev->ctrl, &buf[4], tid,
len - 4);
pm_runtime_mark_last_busy(dev->dev);
}
if (mc == SLIM_USR_MC_ADDR_REPLY &&
mt == SLIM_MSG_MT_SRC_REFERRED_USER) {
struct slim_msg_txn *txn;
u8 failed_ea[6] = {0, 0, 0, 0, 0, 0};
spin_lock_irqsave(&dev->ctrl.txn_lock, flags);
txn = dev->ctrl.txnt[buf[3]];
if (!txn) {
spin_unlock_irqrestore(&dev->ctrl.txn_lock, flags);
SLIM_WARN(dev,
"LADDR response after timeout, tid:0x%x\n",
buf[3]);
return;
}
if (memcmp(&buf[4], failed_ea, 6))
txn->la = buf[10];
dev->ctrl.txnt[buf[3]] = NULL;
complete(txn->comp);
spin_unlock_irqrestore(&dev->ctrl.txn_lock, flags);
}
if (mc == SLIM_USR_MC_GENERIC_ACK &&
mt == SLIM_MSG_MT_SRC_REFERRED_USER) {
struct slim_msg_txn *txn;
spin_lock_irqsave(&dev->ctrl.txn_lock, flags);
txn = dev->ctrl.txnt[buf[3]];
if (!txn) {
spin_unlock_irqrestore(&dev->ctrl.txn_lock, flags);
SLIM_WARN(dev, "ACK received after timeout, tid:0x%x\n",
buf[3]);
return;
}
dev_dbg(dev->dev, "got response:tid:%d, response:0x%x",
(int)buf[3], buf[4]);
if (!(buf[4] & MSM_SAT_SUCCSS)) {
SLIM_WARN(dev, "TID:%d, NACK code:0x%x\n", (int)buf[3],
buf[4]);
txn->ec = -EIO;
}
dev->ctrl.txnt[buf[3]] = NULL;
complete(txn->comp);
spin_unlock_irqrestore(&dev->ctrl.txn_lock, flags);
}
}
static int ngd_slim_power_up(struct msm_slim_ctrl *dev, bool mdm_restart)
{
void __iomem *ngd;
int timeout, ret = 0;
enum msm_ctrl_state cur_state = dev->state;
u32 laddr;
u32 rx_msgq;
u32 ngd_int = (NGD_INT_TX_NACKED_2 |
NGD_INT_MSG_BUF_CONTE | NGD_INT_MSG_TX_INVAL |
NGD_INT_IE_VE_CHG | NGD_INT_DEV_ERR |
NGD_INT_TX_MSG_SENT | NGD_INT_RX_MSG_RCVD);
if (!mdm_restart && cur_state == MSM_CTRL_DOWN) {
int timeout = wait_for_completion_timeout(&dev->qmi.qmi_comp,
HZ);
if (!timeout) {
SLIM_ERR(dev, "slimbus QMI init timed out\n");
return -EREMOTEIO;
}
}
/* No need to vote if contorller is not in low power mode */
if (!mdm_restart &&
(cur_state == MSM_CTRL_DOWN || cur_state == MSM_CTRL_ASLEEP)) {
ret = msm_slim_qmi_power_request(dev, true);
if (ret) {
SLIM_ERR(dev, "SLIM QMI power request failed:%d\n",
ret);
return ret;
}
}
if (!dev->ver) {
dev->ver = readl_relaxed(dev->base);
/* Version info in 16 MSbits */
dev->ver >>= 16;
}
ngd = dev->base + NGD_BASE(dev->ctrl.nr, dev->ver);
laddr = readl_relaxed(ngd + NGD_STATUS);
if (laddr & NGD_LADDR) {
/*
* external MDM restart case where ADSP itself was active framer
* For example, modem restarted when playback was active
*/
if (cur_state == MSM_CTRL_AWAKE) {
SLIM_INFO(dev, "Subsys restart: ADSP active framer\n");
return 0;
}
/*
* ADSP power collapse case, where HW wasn't reset.
*/
return 0;
}
if (mdm_restart) {
/*
* external MDM SSR when MDM is active framer
* ADSP will reset slimbus HW. disconnect BAM pipes so that
* they can be connected after capability message is received.
* Set device state to ASLEEP to be synchronous with the HW
*/
/* make current state as DOWN */
cur_state = MSM_CTRL_DOWN;
SLIM_INFO(dev,
"SLIM MDM restart: MDM active framer: reinit HW\n");
/* disconnect BAM pipes */
msm_slim_sps_exit(dev, false);
dev->state = MSM_CTRL_DOWN;
}
/*
* ADSP power collapse case (OR SSR), where HW was reset
* BAM programming will happen when capability message is received
*/
writel_relaxed(ngd_int, dev->base + NGD_INT_EN +
NGD_BASE(dev->ctrl.nr, dev->ver));
rx_msgq = readl_relaxed(ngd + NGD_RX_MSGQ_CFG);
/* Program with minimum value so that signal get
* triggered immediately after receiving the message */
writel_relaxed(rx_msgq|SLIM_RX_MSGQ_TIMEOUT_VAL,
ngd + NGD_RX_MSGQ_CFG);
/* make sure register got updated */
mb();
/* reconnect BAM pipes if needed and enable NGD */
ngd_slim_setup(dev);
timeout = wait_for_completion_timeout(&dev->reconf, HZ);
if (!timeout) {
SLIM_WARN(dev, "capability exchange timed-out\n");
return -ETIMEDOUT;
}
/* mutliple transactions waiting on slimbus to power up? */
if (cur_state == MSM_CTRL_DOWN)
complete_all(&dev->ctrl_up);
/* Resetting the log level */
SLIM_RST_LOGLVL(dev);
return 0;
}
static int ngd_slim_enable(struct msm_slim_ctrl *dev, bool enable)
{
int ret = 0;
if (enable) {
ret = msm_slim_qmi_init(dev, false);
/* controller state should be in sync with framework state */
if (!ret) {
complete(&dev->qmi.qmi_comp);
if (!pm_runtime_enabled(dev->dev) ||
!pm_runtime_suspended(dev->dev))
ngd_slim_runtime_resume(dev->dev);
else
pm_runtime_resume(dev->dev);
pm_runtime_mark_last_busy(dev->dev);
pm_runtime_put(dev->dev);
} else
SLIM_ERR(dev, "qmi init fail, ret:%d, state:%d\n",
ret, dev->state);
} else {
msm_slim_qmi_exit(dev);
}
return ret;
}
#ifdef CONFIG_PM
static int ngd_slim_power_down(struct msm_slim_ctrl *dev)
{
unsigned long flags;
int i;
struct slim_controller *ctrl = &dev->ctrl;
spin_lock_irqsave(&ctrl->txn_lock, flags);
/* Pending response for a message */
for (i = 0; i < ctrl->last_tid; i++) {
if (ctrl->txnt[i]) {
spin_unlock_irqrestore(&ctrl->txn_lock, flags);
SLIM_INFO(dev, "NGD down:txn-rsp for %d pending", i);
return -EBUSY;
}
}
spin_unlock_irqrestore(&ctrl->txn_lock, flags);
return msm_slim_qmi_power_request(dev, false);
}
#endif
static int ngd_slim_rx_msgq_thread(void *data)
{
struct msm_slim_ctrl *dev = (struct msm_slim_ctrl *)data;
struct completion *notify = &dev->rx_msgq_notify;
int ret = 0;
while (!kthread_should_stop()) {
struct slim_msg_txn txn;
int retries = 0;
u8 wbuf[8];
set_current_state(TASK_INTERRUPTIBLE);
wait_for_completion(notify);
txn.dt = SLIM_MSG_DEST_LOGICALADDR;
txn.ec = 0;
txn.rbuf = NULL;
txn.mc = SLIM_USR_MC_REPORT_SATELLITE;
txn.mt = SLIM_MSG_MT_SRC_REFERRED_USER;
txn.la = SLIM_LA_MGR;
wbuf[0] = SAT_MAGIC_LSB;
wbuf[1] = SAT_MAGIC_MSB;
wbuf[2] = SAT_MSG_VER;
wbuf[3] = SAT_MSG_PROT;
txn.wbuf = wbuf;
txn.len = 4;
SLIM_INFO(dev, "SLIM SAT: Rcvd master capability\n");
capability_retry:
txn.rl = 8;
ret = ngd_xfer_msg(&dev->ctrl, &txn);
if (!ret) {
enum msm_ctrl_state prev_state = dev->state;
SLIM_INFO(dev,
"SLIM SAT: capability exchange successful\n");
if (prev_state >= MSM_CTRL_ASLEEP)
complete(&dev->reconf);
else
SLIM_WARN(dev,
"SLIM: unexpected capability, state:%d\n",
prev_state);
/* ADSP SSR, send device_up notifications */
if (prev_state == MSM_CTRL_DOWN)
complete(&dev->qmi.slave_notify);
} else if (ret == -EIO) {
SLIM_WARN(dev, "capability message NACKed, retrying\n");
if (retries < INIT_MX_RETRIES) {
msleep(DEF_RETRY_MS);
retries++;
goto capability_retry;
}
} else {
SLIM_WARN(dev, "SLIM: capability TX failed:%d\n", ret);
}
}
return 0;
}
static int ngd_notify_slaves(void *data)
{
struct msm_slim_ctrl *dev = (struct msm_slim_ctrl *)data;
struct slim_controller *ctrl = &dev->ctrl;
struct slim_device *sbdev;
struct list_head *pos, *next;
int ret, i = 0;
ret = qmi_svc_event_notifier_register(SLIMBUS_QMI_SVC_ID,
SLIMBUS_QMI_SVC_V1,
SLIMBUS_QMI_INS_ID, &dev->qmi.nb);
if (ret) {
pr_err("Slimbus QMI service registration failed:%d", ret);
return ret;
}
while (!kthread_should_stop()) {
set_current_state(TASK_INTERRUPTIBLE);
wait_for_completion(&dev->qmi.slave_notify);
/* Probe devices for first notification */
if (!i) {
i++;
dev->err = 0;
if (dev->dev->of_node)
of_register_slim_devices(&dev->ctrl);
/*
* Add devices registered with board-info now that
* controller is up
*/
slim_ctrl_add_boarddevs(&dev->ctrl);
} else {
slim_framer_booted(ctrl);
}
mutex_lock(&ctrl->m_ctrl);
list_for_each_safe(pos, next, &ctrl->devs) {
int j;
sbdev = list_entry(pos, struct slim_device, dev_list);
mutex_unlock(&ctrl->m_ctrl);
for (j = 0; j < LADDR_RETRY; j++) {
ret = slim_get_logical_addr(sbdev,
sbdev->e_addr,
6, &sbdev->laddr);
if (!ret)
break;
else /* time for ADSP to assign LA */
msleep(20);
}
mutex_lock(&ctrl->m_ctrl);
}
mutex_unlock(&ctrl->m_ctrl);
}
return 0;
}
static void ngd_adsp_down(struct msm_slim_ctrl *dev)
{
struct slim_controller *ctrl = &dev->ctrl;
struct slim_device *sbdev;
mutex_lock(&dev->ssr_lock);
ngd_slim_enable(dev, false);
/* device up should be called again after SSR */
list_for_each_entry(sbdev, &ctrl->devs, dev_list)
slim_report_absent(sbdev);
SLIM_INFO(dev, "SLIM ADSP SSR (DOWN) done\n");
mutex_unlock(&dev->ssr_lock);
}
static void ngd_adsp_up(struct work_struct *work)
{
struct msm_slim_qmi *qmi =
container_of(work, struct msm_slim_qmi, ssr_up);
struct msm_slim_ctrl *dev =
container_of(qmi, struct msm_slim_ctrl, qmi);
mutex_lock(&dev->ssr_lock);
ngd_slim_enable(dev, true);
mutex_unlock(&dev->ssr_lock);
}
static ssize_t show_mask(struct device *device, struct device_attribute *attr,
char *buf)
{
struct platform_device *pdev = to_platform_device(device);
struct msm_slim_ctrl *dev = platform_get_drvdata(pdev);
return snprintf(buf, sizeof(int), "%u\n", dev->ipc_log_mask);
}
static ssize_t set_mask(struct device *device, struct device_attribute *attr,
const char *buf, size_t count)
{
struct platform_device *pdev = to_platform_device(device);
struct msm_slim_ctrl *dev = platform_get_drvdata(pdev);
dev->ipc_log_mask = buf[0] - '0';
if (dev->ipc_log_mask > DBG_LEV)
dev->ipc_log_mask = DBG_LEV;
return count;
}
static DEVICE_ATTR(debug_mask, S_IRUGO | S_IWUSR, show_mask, set_mask);
static int ngd_slim_probe(struct platform_device *pdev)
{
struct msm_slim_ctrl *dev;
int ret;
struct resource *bam_mem;
struct resource *slim_mem;
struct resource *irq, *bam_irq;
bool rxreg_access = false;
bool slim_mdm = false;
const char *ext_modem_id = NULL, *subsys_name = NULL;
slim_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"slimbus_physical");
if (!slim_mem) {
dev_err(&pdev->dev, "no slimbus physical memory resource\n");
return -ENODEV;
}
bam_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"slimbus_bam_physical");
if (!bam_mem) {
dev_err(&pdev->dev, "no slimbus BAM memory resource\n");
return -ENODEV;
}
irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
"slimbus_irq");
if (!irq) {
dev_err(&pdev->dev, "no slimbus IRQ resource\n");
return -ENODEV;
}
bam_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
"slimbus_bam_irq");
if (!bam_irq) {
dev_err(&pdev->dev, "no slimbus BAM IRQ resource\n");
return -ENODEV;
}
dev = kzalloc(sizeof(struct msm_slim_ctrl), GFP_KERNEL);
if (IS_ERR_OR_NULL(dev)) {
dev_err(&pdev->dev, "no memory for MSM slimbus controller\n");
return PTR_ERR(dev);
}
dev->wr_comp = kzalloc(sizeof(struct completion *) * MSM_TX_BUFS,
GFP_KERNEL);
if (!dev->wr_comp)
return -ENOMEM;
/* typical txn numbers and size used in bulk operation */
dev->bulk.buf_sz = SLIM_MAX_TXNS * 8;
dev->bulk.base = kzalloc(dev->bulk.buf_sz, GFP_KERNEL);
if (!dev->bulk.base) {
ret = -ENOMEM;
goto err_nobulk;
}
dev->dev = &pdev->dev;
platform_set_drvdata(pdev, dev);
slim_set_ctrldata(&dev->ctrl, dev);
/* Create IPC log context */
dev->ipc_slimbus_log = ipc_log_context_create(IPC_SLIMBUS_LOG_PAGES,
dev_name(dev->dev), 0);
if (!dev->ipc_slimbus_log)
dev_err(&pdev->dev, "error creating ipc_logging context\n");
else {
/* Initialize the log mask */
dev->ipc_log_mask = INFO_LEV;
dev->default_ipc_log_mask = INFO_LEV;
SLIM_INFO(dev, "start logging for slim dev %s\n",
dev_name(dev->dev));
}
ret = sysfs_create_file(&dev->dev->kobj, &dev_attr_debug_mask.attr);
if (ret) {
dev_err(&pdev->dev, "Failed to create dev. attr\n");
dev->sysfs_created = false;
} else
dev->sysfs_created = true;
dev->base = ioremap(slim_mem->start, resource_size(slim_mem));
if (!dev->base) {
dev_err(&pdev->dev, "IOremap failed\n");
ret = -ENOMEM;
goto err_ioremap_failed;
}
dev->bam.base = ioremap(bam_mem->start, resource_size(bam_mem));
if (!dev->bam.base) {
dev_err(&pdev->dev, "BAM IOremap failed\n");
ret = -ENOMEM;
goto err_ioremap_bam_failed;
}
if (pdev->dev.of_node) {
ret = of_property_read_u32(pdev->dev.of_node, "cell-index",
&dev->ctrl.nr);
if (ret) {
dev_err(&pdev->dev, "Cell index not specified:%d", ret);
goto err_ctrl_failed;
}
rxreg_access = of_property_read_bool(pdev->dev.of_node,
"qcom,rxreg-access");
of_property_read_u32(pdev->dev.of_node, "qcom,apps-ch-pipes",
&dev->pdata.apps_pipes);
of_property_read_u32(pdev->dev.of_node, "qcom,ea-pc",
&dev->pdata.eapc);
ret = of_property_read_string(pdev->dev.of_node,
"qcom,slim-mdm", &ext_modem_id);
if (!ret)
slim_mdm = true;
} else {
dev->ctrl.nr = pdev->id;
}
/*
* Keep PGD's logical address as manager's. Query it when first data
* channel request comes in
*/
dev->pgdla = SLIM_LA_MGR;
dev->ctrl.nchans = MSM_SLIM_NCHANS;
dev->ctrl.nports = MSM_SLIM_NPORTS;
dev->framer.rootfreq = SLIM_ROOT_FREQ >> 3;
dev->framer.superfreq =
dev->framer.rootfreq / SLIM_CL_PER_SUPERFRAME_DIV8;
dev->ctrl.a_framer = &dev->framer;
dev->ctrl.clkgear = SLIM_MAX_CLK_GEAR;
dev->ctrl.set_laddr = ngd_set_laddr;
dev->ctrl.get_laddr = ngd_get_laddr;
dev->ctrl.allocbw = ngd_allocbw;
dev->ctrl.xfer_msg = ngd_xfer_msg;
dev->ctrl.xfer_user_msg = ngd_user_msg;
dev->ctrl.xfer_bulk_wr = ngd_bulk_wr;
dev->ctrl.wakeup = NULL;
dev->ctrl.alloc_port = msm_alloc_port;
dev->ctrl.dealloc_port = msm_dealloc_port;
dev->ctrl.port_xfer = msm_slim_port_xfer;
dev->ctrl.port_xfer_status = msm_slim_port_xfer_status;
dev->bam_mem = bam_mem;
dev->rx_slim = ngd_slim_rx;
init_completion(&dev->reconf);
init_completion(&dev->ctrl_up);
mutex_init(&dev->tx_lock);
mutex_init(&dev->ssr_lock);
spin_lock_init(&dev->tx_buf_lock);
spin_lock_init(&dev->rx_lock);
dev->ee = 1;
dev->irq = irq->start;
dev->bam.irq = bam_irq->start;
if (rxreg_access)
dev->use_rx_msgqs = MSM_MSGQ_DISABLED;
else
dev->use_rx_msgqs = MSM_MSGQ_RESET;
/* Enable TX message queues by default as recommended by HW */
dev->use_tx_msgqs = MSM_MSGQ_RESET;
init_completion(&dev->rx_msgq_notify);
init_completion(&dev->qmi.slave_notify);
/* Register with framework */
ret = slim_add_numbered_controller(&dev->ctrl);
if (ret) {
dev_err(dev->dev, "error adding controller\n");
goto err_ctrl_failed;
}
dev->ctrl.dev.parent = &pdev->dev;
dev->ctrl.dev.of_node = pdev->dev.of_node;
dev->state = MSM_CTRL_DOWN;
/*
* As this does not perform expensive
* operations, it can execute in an
* interrupt context. This avoids
* context switches, provides
* extensive benifits and performance
* improvements.
*/
ret = request_irq(dev->irq,
ngd_slim_interrupt,
IRQF_TRIGGER_HIGH,
"ngd_slim_irq", dev);
if (ret) {
dev_err(&pdev->dev, "request IRQ failed\n");
goto err_request_irq_failed;
}
init_completion(&dev->qmi.qmi_comp);
dev->err = -EPROBE_DEFER;
pm_runtime_use_autosuspend(dev->dev);
pm_runtime_set_autosuspend_delay(dev->dev, MSM_SLIM_AUTOSUSPEND);
pm_runtime_set_suspended(dev->dev);
pm_runtime_enable(dev->dev);
dev->dsp.nb.priority = 4;
ret = of_property_read_string(pdev->dev.of_node,
"qcom,subsys-name", &subsys_name);
if (ret) {
dev->dsp.nb.notifier_call = dsp_ssr_notify_cb;
dev->dsp.ssr = subsys_notif_register_notifier("adsp",
&dev->dsp.nb);
} else {
dev->dsp.nb.notifier_call = dsp_ssr_notify_cb;
dev->dsp.ssr = subsys_notif_register_notifier(subsys_name,
&dev->dsp.nb);
}
if (IS_ERR_OR_NULL(dev->dsp.ssr))
dev_err(dev->dev,
"subsys_notif_register_notifier failed %p",
dev->dsp.ssr);
if (slim_mdm) {
dev->ext_mdm.nb.notifier_call = mdm_ssr_notify_cb;
dev->ext_mdm.ssr = subsys_notif_register_notifier(ext_modem_id,
&dev->ext_mdm.nb);
if (IS_ERR_OR_NULL(dev->ext_mdm.ssr))
dev_err(dev->dev,
"subsys_notif_register_notifier failed %p",
dev->ext_mdm.ssr);
}
INIT_WORK(&dev->qmi.ssr_up, ngd_adsp_up);
dev->qmi.nb.notifier_call = ngd_qmi_available;
pm_runtime_get_noresume(dev->dev);
/* Fire up the Rx message queue thread */
dev->rx_msgq_thread = kthread_run(ngd_slim_rx_msgq_thread, dev,
"ngd_rx_thread%d", dev->ctrl.nr);
if (IS_ERR(dev->rx_msgq_thread)) {
ret = PTR_ERR(dev->rx_msgq_thread);
dev_err(dev->dev, "Failed to start Rx thread:%d\n", ret);
goto err_rx_thread_create_failed;
}
/* Start thread to probe, and notify slaves */
dev->qmi.slave_thread = kthread_run(ngd_notify_slaves, dev,
"ngd_notify_sl%d", dev->ctrl.nr);
if (IS_ERR(dev->qmi.slave_thread)) {
ret = PTR_ERR(dev->qmi.slave_thread);
dev_err(dev->dev, "Failed to start notifier thread:%d\n", ret);
goto err_notify_thread_create_failed;
}
SLIM_INFO(dev, "NGD SB controller is up!\n");
return 0;
err_notify_thread_create_failed:
kthread_stop(dev->rx_msgq_thread);
err_rx_thread_create_failed:
free_irq(dev->irq, dev);
err_request_irq_failed:
err_ctrl_failed:
iounmap(dev->bam.base);
err_ioremap_bam_failed:
iounmap(dev->base);
err_ioremap_failed:
if (dev->sysfs_created)
sysfs_remove_file(&dev->dev->kobj,
&dev_attr_debug_mask.attr);
kfree(dev->bulk.base);
err_nobulk:
kfree(dev->wr_comp);
kfree(dev);
return ret;
}
static int ngd_slim_remove(struct platform_device *pdev)
{
struct msm_slim_ctrl *dev = platform_get_drvdata(pdev);
ngd_slim_enable(dev, false);
if (dev->sysfs_created)
sysfs_remove_file(&dev->dev->kobj,
&dev_attr_debug_mask.attr);
qmi_svc_event_notifier_unregister(SLIMBUS_QMI_SVC_ID,
SLIMBUS_QMI_SVC_V1,
SLIMBUS_QMI_INS_ID, &dev->qmi.nb);
pm_runtime_disable(&pdev->dev);
if (!IS_ERR_OR_NULL(dev->dsp.ssr))
subsys_notif_unregister_notifier(dev->dsp.ssr,
&dev->dsp.nb);
if (!IS_ERR_OR_NULL(dev->ext_mdm.ssr))
subsys_notif_unregister_notifier(dev->ext_mdm.ssr,
&dev->ext_mdm.nb);
kfree(dev->bulk.base);
free_irq(dev->irq, dev);
slim_del_controller(&dev->ctrl);
kthread_stop(dev->rx_msgq_thread);
iounmap(dev->bam.base);
iounmap(dev->base);
kfree(dev->wr_comp);
kfree(dev);
return 0;
}
#ifdef CONFIG_PM_RUNTIME
static int ngd_slim_runtime_idle(struct device *device)
{
struct platform_device *pdev = to_platform_device(device);
struct msm_slim_ctrl *dev = platform_get_drvdata(pdev);
mutex_lock(&dev->tx_lock);
if (dev->state == MSM_CTRL_AWAKE)
dev->state = MSM_CTRL_IDLE;
mutex_unlock(&dev->tx_lock);
dev_dbg(device, "pm_runtime: idle...\n");
pm_request_autosuspend(device);
return -EAGAIN;
}
#endif
/*
* If PM_RUNTIME is not defined, these 2 functions become helper
* functions to be called from system suspend/resume. So they are not
* inside ifdef CONFIG_PM_RUNTIME
*/
static int ngd_slim_runtime_resume(struct device *device)
{
struct platform_device *pdev = to_platform_device(device);
struct msm_slim_ctrl *dev = platform_get_drvdata(pdev);
int ret = 0;
mutex_lock(&dev->tx_lock);
if (dev->state >= MSM_CTRL_ASLEEP)
ret = ngd_slim_power_up(dev, false);
if (ret) {
/* Did SSR cause this power up failure */
if (dev->state != MSM_CTRL_DOWN)
dev->state = MSM_CTRL_ASLEEP;
else
SLIM_WARN(dev, "HW wakeup attempt during SSR\n");
} else {
dev->state = MSM_CTRL_AWAKE;
}
mutex_unlock(&dev->tx_lock);
SLIM_INFO(dev, "Slim runtime resume: ret %d\n", ret);
return ret;
}
#ifdef CONFIG_PM
static int ngd_slim_runtime_suspend(struct device *device)
{
struct platform_device *pdev = to_platform_device(device);
struct msm_slim_ctrl *dev = platform_get_drvdata(pdev);
int ret = 0;
mutex_lock(&dev->tx_lock);
ret = ngd_slim_power_down(dev);
if (ret && ret != -EBUSY)
SLIM_INFO(dev, "slim resource not idle:%d\n", ret);
if (!ret || ret == -ETIMEDOUT)
dev->state = MSM_CTRL_ASLEEP;
mutex_unlock(&dev->tx_lock);
SLIM_INFO(dev, "Slim runtime suspend: ret %d\n", ret);
return ret;
}
#endif
#ifdef CONFIG_PM_SLEEP
static int ngd_slim_suspend(struct device *dev)
{
int ret = -EBUSY;
struct platform_device *pdev = to_platform_device(dev);
struct msm_slim_ctrl *cdev = platform_get_drvdata(pdev);
if (!pm_runtime_enabled(dev) ||
(!pm_runtime_suspended(dev) &&
cdev->state == MSM_CTRL_IDLE)) {
ret = ngd_slim_runtime_suspend(dev);
/*
* If runtime-PM still thinks it's active, then make sure its
* status is in sync with HW status.
* Since this suspend calls QMI api, it results in holding a
* wakelock. That results in failure of first suspend.
* Subsequent suspend should not call low-power transition
* again since the HW is already in suspended state.
*/
if (!ret) {
pm_runtime_disable(dev);
pm_runtime_set_suspended(dev);
pm_runtime_enable(dev);
}
}
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;
}
SLIM_INFO(cdev, "system suspend\n");
return ret;
}
static int ngd_slim_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct msm_slim_ctrl *cdev = platform_get_drvdata(pdev);
/*
* Rely on runtime-PM to call resume in case it is enabled.
* Even if it's not enabled, rely on 1st client transaction to do
* clock/power on
*/
SLIM_INFO(cdev, "system resume\n");
return 0;
}
#endif /* CONFIG_PM_SLEEP */
static const struct dev_pm_ops ngd_slim_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(
ngd_slim_suspend,
ngd_slim_resume
)
SET_RUNTIME_PM_OPS(
ngd_slim_runtime_suspend,
ngd_slim_runtime_resume,
ngd_slim_runtime_idle
)
};
static struct of_device_id ngd_slim_dt_match[] = {
{
.compatible = "qcom,slim-ngd",
},
{}
};
static struct platform_driver ngd_slim_driver = {
.probe = ngd_slim_probe,
.remove = ngd_slim_remove,
.driver = {
.name = NGD_SLIM_NAME,
.owner = THIS_MODULE,
.pm = &ngd_slim_dev_pm_ops,
.of_match_table = ngd_slim_dt_match,
},
};
static int ngd_slim_init(void)
{
return platform_driver_register(&ngd_slim_driver);
}
late_initcall(ngd_slim_init);
static void ngd_slim_exit(void)
{
platform_driver_unregister(&ngd_slim_driver);
}
module_exit(ngd_slim_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("MSM Slimbus controller");
MODULE_ALIAS("platform:msm-slim-ngd");