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gerrit-public.fairphone.software / kernel / msm-4.9 / e46872a7265f471eaff13ccdfb9e911bb1873f75 / . / drivers / slimbus / slim-msm.c
blob: 1cc5d8476630f7a90f86708c0e01ddb961128bc3 [file] [log] [blame]
/* Copyright (c) 2011-2018, 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 <asm/dma-iommu.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/gcd.h>
#include <linux/msm-sps.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/slimbus/slimbus.h>
#include "slim-msm.h"
/* Pipe Number Offset Mask */
#define P_OFF_MASK 0x3FC
#define MSM_SLIM_VA_START (0x40000000)
#define MSM_SLIM_VA_SIZE (0xC0000000)
int msm_slim_rx_enqueue(struct msm_slim_ctrl *dev, u32 *buf, u8 len)
{
spin_lock(&dev->rx_lock);
if ((dev->tail + 1) % MSM_CONCUR_MSG == dev->head) {
spin_unlock(&dev->rx_lock);
dev_err(dev->dev, "RX QUEUE full!");
return -EXFULL;
}
memcpy((u8 *)dev->rx_msgs[dev->tail], (u8 *)buf, len);
dev->tail = (dev->tail + 1) % MSM_CONCUR_MSG;
spin_unlock(&dev->rx_lock);
return 0;
}
int msm_slim_rx_dequeue(struct msm_slim_ctrl *dev, u8 *buf)
{
unsigned long flags;
spin_lock_irqsave(&dev->rx_lock, flags);
if (dev->tail == dev->head) {
spin_unlock_irqrestore(&dev->rx_lock, flags);
return -ENODATA;
}
memcpy(buf, (u8 *)dev->rx_msgs[dev->head], 40);
dev->head = (dev->head + 1) % MSM_CONCUR_MSG;
spin_unlock_irqrestore(&dev->rx_lock, flags);
return 0;
}
int msm_slim_get_ctrl(struct msm_slim_ctrl *dev)
{
#ifdef CONFIG_PM
int ref = 0;
int ret = pm_runtime_get_sync(dev->dev);
if (ret >= 0) {
ref = atomic_read(&dev->dev->power.usage_count);
if (ref <= 0) {
SLIM_WARN(dev, "reference count -ve:%d", ref);
ret = -ENODEV;
}
}
return ret;
#else
return -ENODEV;
#endif
}
void msm_slim_put_ctrl(struct msm_slim_ctrl *dev)
{
#ifdef CONFIG_PM
int ref;
pm_runtime_mark_last_busy(dev->dev);
ref = atomic_read(&dev->dev->power.usage_count);
if (ref <= 0)
SLIM_WARN(dev, "reference count mismatch:%d", ref);
else
pm_runtime_put_sync(dev->dev);
#endif
}
irqreturn_t msm_slim_port_irq_handler(struct msm_slim_ctrl *dev, u32 pstat)
{
int i;
u32 int_en = readl_relaxed(PGD_THIS_EE(PGD_PORT_INT_EN_EEn,
dev->ver));
/*
* different port-interrupt than what we enabled, ignore.
* This may happen if overflow/underflow is reported, but
* was disabled due to unavailability of buffers provided by
* client.
*/
if ((pstat & int_en) == 0)
return IRQ_HANDLED;
for (i = 0; i < dev->port_nums; i++) {
struct msm_slim_endp *endpoint = &dev->pipes[i];
if (pstat & (1 << endpoint->port_b)) {
u32 val = readl_relaxed(PGD_PORT(PGD_PORT_STATn,
endpoint->port_b, dev->ver));
if (val & MSM_PORT_OVERFLOW) {
dev->ctrl.ports[i].err =
SLIM_P_OVERFLOW;
} else if (val & MSM_PORT_UNDERFLOW) {
dev->ctrl.ports[i].err =
SLIM_P_UNDERFLOW;
}
}
}
/*
* Disable port interrupt here. Re-enable when more
* buffers are provided for this port.
*/
writel_relaxed((int_en & (~pstat)),
PGD_THIS_EE(PGD_PORT_INT_EN_EEn,
dev->ver));
/* clear port interrupts */
writel_relaxed(pstat, PGD_THIS_EE(PGD_PORT_INT_CL_EEn,
dev->ver));
SLIM_INFO(dev, "disabled overflow/underflow for port 0x%x", pstat);
/*
* Guarantee that port interrupt bit(s) clearing writes go
* through before exiting ISR
*/
mb();
return IRQ_HANDLED;
}
int msm_slim_init_endpoint(struct msm_slim_ctrl *dev, struct msm_slim_endp *ep)
{
int ret;
struct sps_pipe *endpoint;
struct sps_connect *config = &ep->config;
/* Allocate the endpoint */
endpoint = sps_alloc_endpoint();
if (!endpoint) {
dev_err(dev->dev, "sps_alloc_endpoint failed\n");
return -ENOMEM;
}
/* Get default connection configuration for an endpoint */
ret = sps_get_config(endpoint, config);
if (ret) {
dev_err(dev->dev, "sps_get_config failed 0x%x\n", ret);
goto sps_config_failed;
}
ep->sps = endpoint;
return 0;
sps_config_failed:
sps_free_endpoint(endpoint);
return ret;
}
void msm_slim_free_endpoint(struct msm_slim_endp *ep)
{
sps_free_endpoint(ep->sps);
ep->sps = NULL;
}
static int msm_slim_iommu_attach(struct msm_slim_ctrl *ctrl_dev)
{
struct dma_iommu_mapping *iommu_map;
dma_addr_t va_start = MSM_SLIM_VA_START;
size_t va_size = MSM_SLIM_VA_SIZE;
int bypass = 1;
struct device *dev;
if (unlikely(!ctrl_dev))
return -EINVAL;
if (!ctrl_dev->iommu_desc.cb_dev)
return 0;
if (!IS_ERR_OR_NULL(ctrl_dev->iommu_desc.iommu_map)) {
arm_iommu_detach_device(ctrl_dev->iommu_desc.cb_dev);
arm_iommu_release_mapping(ctrl_dev->iommu_desc.iommu_map);
ctrl_dev->iommu_desc.iommu_map = NULL;
SLIM_INFO(ctrl_dev, "NGD IOMMU Dettach complete\n");
}
dev = ctrl_dev->iommu_desc.cb_dev;
iommu_map = arm_iommu_create_mapping(&platform_bus_type,
va_start, va_size);
if (IS_ERR(iommu_map)) {
dev_err(dev, "%s iommu_create_mapping failure\n", __func__);
return PTR_ERR(iommu_map);
}
if (ctrl_dev->iommu_desc.s1_bypass) {
if (iommu_domain_set_attr(iommu_map->domain,
DOMAIN_ATTR_S1_BYPASS, &bypass)) {
dev_err(dev, "%s Can't bypass s1 translation\n",
__func__);
arm_iommu_release_mapping(iommu_map);
return -EIO;
}
}
if (arm_iommu_attach_device(dev, iommu_map)) {
dev_err(dev, "%s can't arm_iommu_attach_device\n", __func__);
arm_iommu_release_mapping(iommu_map);
return -EIO;
}
ctrl_dev->iommu_desc.iommu_map = iommu_map;
SLIM_INFO(ctrl_dev, "NGD IOMMU Attach complete\n");
return 0;
}
int msm_slim_sps_mem_alloc(
struct msm_slim_ctrl *dev, struct sps_mem_buffer *mem, u32 len)
{
dma_addr_t phys;
struct device *dma_dev = dev->iommu_desc.cb_dev ?
dev->iommu_desc.cb_dev : dev->dev;
mem->size = len;
mem->min_size = 0;
mem->base = dma_alloc_coherent(dma_dev, mem->size, &phys, GFP_KERNEL);
if (!mem->base) {
dev_err(dma_dev, "dma_alloc_coherent(%d) failed\n", len);
return -ENOMEM;
}
mem->phys_base = phys;
memset(mem->base, 0x00, mem->size);
return 0;
}
void
msm_slim_sps_mem_free(struct msm_slim_ctrl *dev, struct sps_mem_buffer *mem)
{
if (mem->base && mem->phys_base)
dma_free_coherent(dev->dev, mem->size, mem->base,
mem->phys_base);
else
dev_err(dev->dev, "cant dma free. they are NULL\n");
mem->size = 0;
mem->base = NULL;
mem->phys_base = 0;
}
void msm_hw_set_port(struct msm_slim_ctrl *dev, u8 pipenum, u8 portnum)
{
struct slim_controller *ctrl;
struct slim_ch *chan;
struct msm_slim_pshpull_parm *parm;
u32 set_cfg = 0;
struct slim_port_cfg cfg = dev->ctrl.ports[portnum].cfg;
if (!dev) {
pr_err("%s:Dev node is null\n", __func__);
return;
}
if (portnum >= dev->port_nums) {
pr_err("%s:Invalid port\n", __func__);
return;
}
ctrl = &dev->ctrl;
chan = ctrl->ports[portnum].ch;
parm = &dev->pipes[portnum].psh_pull;
if (cfg.watermark)
set_cfg = (cfg.watermark << 1);
else
set_cfg = DEF_WATERMARK;
if (cfg.port_opts & SLIM_OPT_NO_PACK)
set_cfg |= DEF_NO_PACK;
else
set_cfg |= DEF_PACK;
if (cfg.port_opts & SLIM_OPT_ALIGN_MSB)
set_cfg |= DEF_ALIGN_MSB;
else
set_cfg |= DEF_ALIGN_LSB;
set_cfg |= ENABLE_PORT;
writel_relaxed(set_cfg, PGD_PORT(PGD_PORT_CFGn, pipenum, dev->ver));
writel_relaxed(DEF_BLKSZ, PGD_PORT(PGD_PORT_BLKn, pipenum, dev->ver));
writel_relaxed(DEF_TRANSZ, PGD_PORT(PGD_PORT_TRANn, pipenum, dev->ver));
if (chan->prot == SLIM_PUSH || chan->prot == SLIM_PULL) {
set_cfg = 0;
set_cfg |= ((0xFFFF & parm->num_samples)<<16);
set_cfg |= (0xFFFF & parm->rpt_period);
writel_relaxed(set_cfg, PGD_PORT(PGD_PORT_PSHPLLn,
pipenum, dev->ver));
}
/* Make sure that port registers are updated before returning */
mb();
}
static void msm_slim_disconn_pipe_port(struct msm_slim_ctrl *dev, u8 pn)
{
struct msm_slim_endp *endpoint = &dev->pipes[pn];
struct sps_register_event sps_event;
u32 int_port = readl_relaxed(PGD_THIS_EE(PGD_PORT_INT_EN_EEn,
dev->ver));
writel_relaxed(0, PGD_PORT(PGD_PORT_CFGn, (endpoint->port_b),
dev->ver));
writel_relaxed((int_port & ~(1 << endpoint->port_b)),
PGD_THIS_EE(PGD_PORT_INT_EN_EEn, dev->ver));
/* Make sure port register is updated */
mb();
memset(&sps_event, 0, sizeof(sps_event));
sps_register_event(endpoint->sps, &sps_event);
sps_disconnect(endpoint->sps);
dev->pipes[pn].connected = false;
}
static void msm_slim_calc_pshpull_parm(struct msm_slim_ctrl *dev,
u8 pn, struct slim_ch *prop)
{
struct msm_slim_endp *endpoint = &dev->pipes[pn];
struct msm_slim_pshpull_parm *parm = &endpoint->psh_pull;
int chan_freq, round_off, divisor, super_freq;
super_freq = dev->ctrl.a_framer->superfreq;
if (prop->baser == SLIM_RATE_4000HZ)
chan_freq = 4000 * prop->ratem;
else if (prop->baser == SLIM_RATE_11025HZ)
chan_freq = 11025 * prop->ratem;
else
chan_freq = prop->baser * prop->ratem;
/*
* If channel frequency is multiple of super frame frequency
* ISO protocol is suggested
*/
if (!(chan_freq % super_freq)) {
prop->prot = SLIM_HARD_ISO;
return;
}
round_off = DIV_ROUND_UP(chan_freq, super_freq);
divisor = gcd(round_off * super_freq, chan_freq);
parm->num_samples = chan_freq/divisor;
parm->rpt_period = (round_off * super_freq)/divisor;
}
int msm_slim_connect_pipe_port(struct msm_slim_ctrl *dev, u8 pn)
{
struct msm_slim_endp *endpoint;
struct sps_connect *cfg;
struct slim_ch *prop;
u32 stat;
int ret;
if (!dev || pn >= dev->port_nums)
return -ENODEV;
endpoint = &dev->pipes[pn];
cfg = &endpoint->config;
prop = dev->ctrl.ports[pn].ch;
endpoint = &dev->pipes[pn];
ret = sps_get_config(dev->pipes[pn].sps, cfg);
if (ret) {
dev_err(dev->dev, "sps pipe-port get config error%x\n", ret);
return ret;
}
cfg->options = SPS_O_DESC_DONE | SPS_O_ERROR |
SPS_O_ACK_TRANSFERS | SPS_O_AUTO_ENABLE;
if (prop->prot == SLIM_PUSH || prop->prot == SLIM_PULL)
msm_slim_calc_pshpull_parm(dev, pn, prop);
if (dev->pipes[pn].connected &&
dev->ctrl.ports[pn].state == SLIM_P_CFG) {
return -EISCONN;
} else if (dev->pipes[pn].connected) {
writel_relaxed(0, PGD_PORT(PGD_PORT_CFGn,
(endpoint->port_b), dev->ver));
/* Make sure port disabling goes through */
mb();
/* Is pipe already connected in desired direction */
if ((dev->ctrl.ports[pn].flow == SLIM_SRC &&
cfg->mode == SPS_MODE_DEST) ||
(dev->ctrl.ports[pn].flow == SLIM_SINK &&
cfg->mode == SPS_MODE_SRC)) {
msm_hw_set_port(dev, endpoint->port_b, pn);
return 0;
}
msm_slim_disconn_pipe_port(dev, pn);
}
stat = readl_relaxed(PGD_PORT(PGD_PORT_STATn, endpoint->port_b,
dev->ver));
if (dev->ctrl.ports[pn].flow == SLIM_SRC) {
cfg->destination = dev->bam.hdl;
cfg->source = SPS_DEV_HANDLE_MEM;
cfg->dest_pipe_index = ((stat & (0xFF << 4)) >> 4);
cfg->src_pipe_index = 0;
dev_dbg(dev->dev, "flow src:pipe num:%d",
cfg->dest_pipe_index);
cfg->mode = SPS_MODE_DEST;
} else {
cfg->source = dev->bam.hdl;
cfg->destination = SPS_DEV_HANDLE_MEM;
cfg->src_pipe_index = ((stat & (0xFF << 4)) >> 4);
cfg->dest_pipe_index = 0;
dev_dbg(dev->dev, "flow dest:pipe num:%d",
cfg->src_pipe_index);
cfg->mode = SPS_MODE_SRC;
}
/* Space for desciptor FIFOs */
ret = msm_slim_sps_mem_alloc(dev, &cfg->desc,
MSM_SLIM_DESC_NUM * sizeof(struct sps_iovec));
if (ret)
pr_err("mem alloc for descr failed:%d", ret);
else
ret = sps_connect(dev->pipes[pn].sps, cfg);
if (!ret) {
dev->pipes[pn].connected = true;
msm_hw_set_port(dev, endpoint->port_b, pn);
}
return ret;
}
int msm_alloc_port(struct slim_controller *ctrl, u8 pn)
{
struct msm_slim_ctrl *dev = slim_get_ctrldata(ctrl);
struct msm_slim_endp *endpoint;
int ret = 0;
if (ctrl->ports[pn].req == SLIM_REQ_HALF_DUP ||
ctrl->ports[pn].req == SLIM_REQ_MULTI_CH)
return -EPROTONOSUPPORT;
if (pn >= dev->port_nums)
return -ENODEV;
ret = msm_slim_iommu_attach(dev);
if (ret)
return ret;
endpoint = &dev->pipes[pn];
ret = msm_slim_init_endpoint(dev, endpoint);
dev_dbg(dev->dev, "sps register bam error code:%x\n", ret);
return ret;
}
void msm_dealloc_port(struct slim_controller *ctrl, u8 pn)
{
struct msm_slim_ctrl *dev = slim_get_ctrldata(ctrl);
struct msm_slim_endp *endpoint;
if (pn >= dev->port_nums)
return;
endpoint = &dev->pipes[pn];
if (dev->pipes[pn].connected) {
struct sps_connect *config = &endpoint->config;
msm_slim_disconn_pipe_port(dev, pn);
msm_slim_sps_mem_free(dev, &config->desc);
}
if (endpoint->sps)
msm_slim_free_endpoint(endpoint);
}
enum slim_port_err msm_slim_port_xfer_status(struct slim_controller *ctr,
u8 pn, phys_addr_t *done_buf, u32 *done_len)
{
struct msm_slim_ctrl *dev = slim_get_ctrldata(ctr);
struct sps_iovec sio;
int ret;
if (done_len)
*done_len = 0;
if (done_buf)
*done_buf = 0;
if (!dev->pipes[pn].connected)
return SLIM_P_DISCONNECT;
ret = sps_get_iovec(dev->pipes[pn].sps, &sio);
if (!ret) {
if (done_len)
*done_len = sio.size;
if (done_buf)
*done_buf = (phys_addr_t)sio.addr;
}
dev_dbg(dev->dev, "get iovec returned %d\n", ret);
return SLIM_P_INPROGRESS;
}
static dma_addr_t msm_slim_iommu_map(struct msm_slim_ctrl *dev, void *buf_addr,
u32 len)
{
dma_addr_t ret;
struct device *devp = dev->iommu_desc.cb_dev ? dev->iommu_desc.cb_dev :
dev->dev;
ret = dma_map_single(devp, buf_addr, len, DMA_BIDIRECTIONAL);
if (dma_mapping_error(devp, ret))
return DMA_ERROR_CODE;
return ret;
}
static void msm_slim_iommu_unmap(struct msm_slim_ctrl *dev, dma_addr_t buf_addr,
u32 len)
{
struct device *devp = dev->iommu_desc.cb_dev ? dev->iommu_desc.cb_dev :
dev->dev;
dma_unmap_single(devp, buf_addr, len, DMA_BIDIRECTIONAL);
}
static void msm_slim_port_cb(struct sps_event_notify *ev)
{
struct msm_slim_ctrl *dev = ev->user;
struct completion *comp = ev->data.transfer.user;
struct sps_iovec *iovec = &ev->data.transfer.iovec;
if (ev->event_id == SPS_EVENT_DESC_DONE) {
pr_debug("desc done iovec = (0x%x 0x%x 0x%x)\n",
iovec->addr, iovec->size, iovec->flags);
} else {
pr_err("%s: ERR event %d\n",
__func__, ev->event_id);
}
if (dev)
msm_slim_iommu_unmap(dev, iovec->addr, iovec->size);
if (comp)
complete(comp);
}
int msm_slim_port_xfer(struct slim_controller *ctrl, u8 pn, void *buf,
u32 len, struct completion *comp)
{
struct sps_register_event sreg;
int ret;
dma_addr_t dma_buf;
struct msm_slim_ctrl *dev = slim_get_ctrldata(ctrl);
if (pn >= dev->port_nums)
return -ENODEV;
if (!dev->pipes[pn].connected)
return -ENOTCONN;
dma_buf = msm_slim_iommu_map(dev, buf, len);
if (dma_buf == DMA_ERROR_CODE) {
dev_err(dev->dev, "error DMA mapping buffers\n");
return -ENOMEM;
}
sreg.options = (SPS_EVENT_DESC_DONE|SPS_EVENT_ERROR);
sreg.mode = SPS_TRIGGER_WAIT;
sreg.xfer_done = NULL;
sreg.callback = msm_slim_port_cb;
sreg.user = dev;
ret = sps_register_event(dev->pipes[pn].sps, &sreg);
if (ret) {
dev_dbg(dev->dev, "sps register event error:%x\n", ret);
msm_slim_iommu_unmap(dev, dma_buf, len);
return ret;
}
ret = sps_transfer_one(dev->pipes[pn].sps, dma_buf, len, comp,
SPS_IOVEC_FLAG_INT);
dev_dbg(dev->dev, "sps submit xfer error code:%x\n", ret);
if (!ret) {
/* Enable port interrupts */
u32 int_port = readl_relaxed(PGD_THIS_EE(PGD_PORT_INT_EN_EEn,
dev->ver));
if (!(int_port & (1 << (dev->pipes[pn].port_b))))
writel_relaxed((int_port |
(1 << dev->pipes[pn].port_b)),
PGD_THIS_EE(PGD_PORT_INT_EN_EEn, dev->ver));
/* Make sure that port registers are updated before returning */
mb();
} else {
msm_slim_iommu_unmap(dev, dma_buf, len);
}
return ret;
}
/* Queue up Tx message buffer */
static int msm_slim_post_tx_msgq(struct msm_slim_ctrl *dev, u8 *buf, int len)
{
int ret;
struct msm_slim_endp *endpoint = &dev->tx_msgq;
struct sps_mem_buffer *mem = &endpoint->buf;
struct sps_pipe *pipe = endpoint->sps;
int ix = (buf - (u8 *)mem->base);
phys_addr_t phys_addr = mem->phys_base + ix;
for (ret = 0; ret < ((len + 3) >> 2); ret++)
pr_debug("BAM TX buf[%d]:0x%x", ret, ((u32 *)buf)[ret]);
ret = sps_transfer_one(pipe, phys_addr, ((len + 3) & 0xFC), NULL,
SPS_IOVEC_FLAG_EOT);
if (ret)
dev_err(dev->dev, "transfer_one() failed 0x%x, %d\n", ret, ix);
return ret;
}
void msm_slim_tx_msg_return(struct msm_slim_ctrl *dev, int err)
{
struct msm_slim_endp *endpoint = &dev->tx_msgq;
struct sps_mem_buffer *mem = &endpoint->buf;
struct sps_pipe *pipe = endpoint->sps;
struct sps_iovec iovec;
int idx, ret = 0;
phys_addr_t addr;
if (dev->use_tx_msgqs != MSM_MSGQ_ENABLED) {
/* use 1 buffer, non-blocking writes are not possible */
if (dev->wr_comp[0]) {
struct completion *comp = dev->wr_comp[0];
dev->wr_comp[0] = NULL;
complete(comp);
}
return;
}
while (!ret) {
memset(&iovec, 0, sizeof(iovec));
ret = sps_get_iovec(pipe, &iovec);
addr = DESC_FULL_ADDR(iovec.flags, iovec.addr);
if (ret || addr == 0) {
if (ret)
pr_err("SLIM TX get IOVEC failed:%d", ret);
return;
}
if (addr == dev->bulk.wr_dma) {
dma_unmap_single(dev->dev, dev->bulk.wr_dma,
dev->bulk.size, DMA_TO_DEVICE);
if (!dev->bulk.cb)
SLIM_WARN(dev, "no callback for bulk WR?");
else
dev->bulk.cb(dev->bulk.ctx, err);
dev->bulk.in_progress = false;
pm_runtime_mark_last_busy(dev->dev);
return;
} else if (addr < mem->phys_base ||
(addr > (mem->phys_base +
(MSM_TX_BUFS * SLIM_MSGQ_BUF_LEN)))) {
SLIM_WARN(dev, "BUF out of bounds:base:0x%pa, io:0x%pa",
&mem->phys_base, &addr);
continue;
}
idx = (int) ((addr - mem->phys_base)
/ SLIM_MSGQ_BUF_LEN);
if (dev->wr_comp[idx]) {
struct completion *comp = dev->wr_comp[idx];
dev->wr_comp[idx] = NULL;
complete(comp);
}
if (err) {
int i;
u32 *addr = (u32 *)mem->base +
(idx * (SLIM_MSGQ_BUF_LEN >> 2));
/* print the descriptor that resulted in error */
for (i = 0; i < (SLIM_MSGQ_BUF_LEN >> 2); i++)
SLIM_WARN(dev, "err desc[%d]:0x%x", i, addr[i]);
}
/* reclaim all packets that were delivered out of order */
if (idx != dev->tx_head)
SLIM_WARN(dev, "SLIM OUT OF ORDER TX:idx:%d, head:%d",
idx, dev->tx_head);
dev->tx_head = (dev->tx_head + 1) % MSM_TX_BUFS;
}
}
static u32 *msm_slim_modify_tx_buf(struct msm_slim_ctrl *dev,
struct completion *comp)
{
struct msm_slim_endp *endpoint = &dev->tx_msgq;
struct sps_mem_buffer *mem = &endpoint->buf;
u32 *retbuf = NULL;
if ((dev->tx_tail + 1) % MSM_TX_BUFS == dev->tx_head)
return NULL;
retbuf = (u32 *)((u8 *)mem->base +
(dev->tx_tail * SLIM_MSGQ_BUF_LEN));
dev->wr_comp[dev->tx_tail] = comp;
dev->tx_tail = (dev->tx_tail + 1) % MSM_TX_BUFS;
return retbuf;
}
u32 *msm_slim_manage_tx_msgq(struct msm_slim_ctrl *dev, bool getbuf,
struct completion *comp, int err)
{
int ret = 0;
int retries = 0;
u32 *retbuf = NULL;
unsigned long flags;
spin_lock_irqsave(&dev->tx_buf_lock, flags);
if (!getbuf) {
msm_slim_tx_msg_return(dev, err);
spin_unlock_irqrestore(&dev->tx_buf_lock, flags);
return NULL;
}
retbuf = msm_slim_modify_tx_buf(dev, comp);
if (retbuf) {
spin_unlock_irqrestore(&dev->tx_buf_lock, flags);
return retbuf;
}
do {
msm_slim_tx_msg_return(dev, err);
retbuf = msm_slim_modify_tx_buf(dev, comp);
if (!retbuf)
ret = -EAGAIN;
else {
if (retries > 0)
SLIM_INFO(dev, "SLIM TX retrieved:%d retries",
retries);
spin_unlock_irqrestore(&dev->tx_buf_lock, flags);
return retbuf;
}
/*
* superframe size will vary based on clock gear
* 1 superframe will consume at least 1 message
* if HW is in good condition. With MX_RETRIES,
* make sure we wait for ~2 superframes
* before deciding HW couldn't process descriptors
*/
udelay(50);
retries++;
} while (ret && (retries < INIT_MX_RETRIES));
spin_unlock_irqrestore(&dev->tx_buf_lock, flags);
return NULL;
}
int msm_send_msg_buf(struct msm_slim_ctrl *dev, u32 *buf, u8 len, u32 tx_reg)
{
if (dev->use_tx_msgqs != MSM_MSGQ_ENABLED) {
int i;
for (i = 0; i < (len + 3) >> 2; i++) {
dev_dbg(dev->dev, "AHB TX data:0x%x\n", buf[i]);
writel_relaxed(buf[i], dev->base + tx_reg + (i * 4));
}
/* Guarantee that message is sent before returning */
mb();
return 0;
}
return msm_slim_post_tx_msgq(dev, (u8 *)buf, len);
}
u32 *msm_get_msg_buf(struct msm_slim_ctrl *dev, int len,
struct completion *comp)
{
/*
* Currently we block a transaction until the current one completes.
* In case we need multiple transactions, use message Q
*/
if (dev->use_tx_msgqs != MSM_MSGQ_ENABLED) {
dev->wr_comp[0] = comp;
return dev->tx_buf;
}
return msm_slim_manage_tx_msgq(dev, true, comp, 0);
}
static void
msm_slim_rx_msgq_event(struct msm_slim_ctrl *dev, struct sps_event_notify *ev)
{
if (ev->event_id == SPS_EVENT_DESC_DONE)
complete(&dev->rx_msgq_notify);
else
dev_err(dev->dev, "%s: unknown event %d\n",
__func__, ev->event_id);
}
static void
msm_slim_handle_rx(struct msm_slim_ctrl *dev, struct sps_event_notify *ev)
{
int ret = 0;
u32 mc = 0;
u32 mt = 0;
u8 msg_len = 0;
if (ev->event_id != SPS_EVENT_EOT) {
dev_err(dev->dev, "%s: unknown event %d\n",
__func__, ev->event_id);
return;
}
do {
ret = msm_slim_rx_msgq_get(dev, dev->current_rx_buf,
dev->current_count);
if (ret == -ENODATA) {
return;
} else if (ret) {
SLIM_ERR(dev, "rx_msgq_get() failed 0x%x\n",
ret);
return;
}
/* Traverse first byte of message for message length */
if (dev->current_count++ == 0) {
msg_len = *(dev->current_rx_buf) & 0x1F;
mt = (*(dev->current_rx_buf) >> 5) & 0x7;
mc = (*(dev->current_rx_buf) >> 8) & 0xff;
dev_dbg(dev->dev, "MC: %x, MT: %x\n", mc, mt);
}
msg_len = (msg_len < 4) ? 0 : (msg_len - 4);
if (!msg_len) {
dev->rx_slim(dev, (u8 *)dev->current_rx_buf);
dev->current_count = 0;
}
} while (1);
}
static void msm_slim_rx_msgq_cb(struct sps_event_notify *notify)
{
struct msm_slim_ctrl *dev = (struct msm_slim_ctrl *)notify->user;
/* is this manager controller or NGD controller? */
if (dev->ctrl.wakeup)
msm_slim_rx_msgq_event(dev, notify);
else
msm_slim_handle_rx(dev, notify);
}
/* Queue up Rx message buffer */
static int msm_slim_post_rx_msgq(struct msm_slim_ctrl *dev, int ix)
{
int ret;
struct msm_slim_endp *endpoint = &dev->rx_msgq;
struct sps_mem_buffer *mem = &endpoint->buf;
struct sps_pipe *pipe = endpoint->sps;
/* Rx message queue buffers are 4 bytes in length */
u8 *virt_addr = mem->base + (4 * ix);
phys_addr_t phys_addr = mem->phys_base + (4 * ix);
ret = sps_transfer_one(pipe, phys_addr, 4, virt_addr, 0);
if (ret)
dev_err(dev->dev, "transfer_one() failed 0x%x, %d\n", ret, ix);
return ret;
}
int msm_slim_rx_msgq_get(struct msm_slim_ctrl *dev, u32 *data, int offset)
{
struct msm_slim_endp *endpoint = &dev->rx_msgq;
struct sps_mem_buffer *mem = &endpoint->buf;
struct sps_pipe *pipe = endpoint->sps;
struct sps_iovec iovec;
phys_addr_t addr;
int index;
int ret;
ret = sps_get_iovec(pipe, &iovec);
if (ret) {
dev_err(dev->dev, "sps_get_iovec() failed 0x%x\n", ret);
goto err_exit;
}
addr = DESC_FULL_ADDR(iovec.flags, iovec.addr);
pr_debug("iovec = (0x%x 0x%x 0x%x)\n",
iovec.addr, iovec.size, iovec.flags);
/* no more descriptors */
if (!ret && (iovec.addr == 0) && (iovec.size == 0)) {
ret = -ENODATA;
goto err_exit;
}
/* Calculate buffer index */
index = (addr - mem->phys_base) / 4;
*(data + offset) = *((u32 *)mem->base + index);
pr_debug("buf = 0x%p, data = 0x%x\n", (u32 *)mem->base + index, *data);
/* Add buffer back to the queue */
(void)msm_slim_post_rx_msgq(dev, index);
err_exit:
return ret;
}
int msm_slim_connect_endp(struct msm_slim_ctrl *dev,
struct msm_slim_endp *endpoint)
{
int i, ret;
struct sps_register_event sps_error_event; /* SPS_ERROR */
struct sps_register_event sps_descr_event; /* DESCR_DONE */
struct sps_connect *config = &endpoint->config;
unsigned long flags;
ret = sps_connect(endpoint->sps, config);
if (ret) {
dev_err(dev->dev, "sps_connect failed 0x%x\n", ret);
return ret;
}
memset(&sps_descr_event, 0x00, sizeof(sps_descr_event));
if (endpoint == &dev->rx_msgq) {
sps_descr_event.mode = SPS_TRIGGER_CALLBACK;
sps_descr_event.options = SPS_O_EOT;
sps_descr_event.user = (void *)dev;
sps_descr_event.callback = msm_slim_rx_msgq_cb;
sps_descr_event.xfer_done = NULL;
ret = sps_register_event(endpoint->sps, &sps_descr_event);
if (ret) {
dev_err(dev->dev, "sps_connect() failed 0x%x\n", ret);
goto sps_reg_event_failed;
}
}
/* Register callback for errors */
memset(&sps_error_event, 0x00, sizeof(sps_error_event));
sps_error_event.mode = SPS_TRIGGER_CALLBACK;
sps_error_event.options = SPS_O_ERROR;
sps_error_event.user = (void *)dev;
sps_error_event.callback = msm_slim_rx_msgq_cb;
ret = sps_register_event(endpoint->sps, &sps_error_event);
if (ret) {
dev_err(dev->dev, "sps_connect() failed 0x%x\n", ret);
goto sps_reg_event_failed;
}
/*
* Call transfer_one for each 4-byte buffer
* Use (buf->size/4) - 1 for the number of buffer to post
*/
if (endpoint == &dev->rx_msgq) {
/* Setup the transfer */
for (i = 0; i < (MSM_SLIM_DESC_NUM - 1); i++) {
ret = msm_slim_post_rx_msgq(dev, i);
if (ret) {
dev_err(dev->dev,
"post_rx_msgq() failed 0x%x\n", ret);
goto sps_transfer_failed;
}
}
dev->use_rx_msgqs = MSM_MSGQ_ENABLED;
} else {
spin_lock_irqsave(&dev->tx_buf_lock, flags);
dev->tx_tail = 0;
dev->tx_head = 0;
for (i = 0; i < MSM_TX_BUFS; i++)
dev->wr_comp[i] = NULL;
spin_unlock_irqrestore(&dev->tx_buf_lock, flags);
dev->use_tx_msgqs = MSM_MSGQ_ENABLED;
}
return 0;
sps_transfer_failed:
memset(&sps_error_event, 0x00, sizeof(sps_error_event));
sps_register_event(endpoint->sps, &sps_error_event);
sps_reg_event_failed:
sps_disconnect(endpoint->sps);
return ret;
}
static int msm_slim_init_rx_msgq(struct msm_slim_ctrl *dev, u32 pipe_reg)
{
int ret;
u32 pipe_offset;
struct msm_slim_endp *endpoint = &dev->rx_msgq;
struct sps_connect *config = &endpoint->config;
struct sps_mem_buffer *descr = &config->desc;
struct sps_mem_buffer *mem = &endpoint->buf;
if (dev->use_rx_msgqs == MSM_MSGQ_DISABLED)
return 0;
/* Allocate the endpoint */
ret = msm_slim_init_endpoint(dev, endpoint);
if (ret) {
dev_err(dev->dev, "init_endpoint failed 0x%x\n", ret);
goto sps_init_endpoint_failed;
}
/* Get the pipe indices for the message queues */
pipe_offset = (readl_relaxed(dev->base + pipe_reg) & P_OFF_MASK) >> 2;
dev_dbg(dev->dev, "Message queue pipe offset %d\n", pipe_offset);
config->mode = SPS_MODE_SRC;
config->source = dev->bam.hdl;
config->destination = SPS_DEV_HANDLE_MEM;
config->src_pipe_index = pipe_offset;
config->options = SPS_O_EOT | SPS_O_ERROR |
SPS_O_ACK_TRANSFERS | SPS_O_AUTO_ENABLE;
/* Allocate memory for the FIFO descriptors */
ret = msm_slim_sps_mem_alloc(dev, descr,
MSM_SLIM_DESC_NUM * sizeof(struct sps_iovec));
if (ret) {
dev_err(dev->dev, "unable to allocate SPS descriptors\n");
goto alloc_descr_failed;
}
/* Allocate memory for the message buffer(s), N descrs, 4-byte mesg */
ret = msm_slim_sps_mem_alloc(dev, mem, MSM_SLIM_DESC_NUM * 4);
if (ret) {
dev_err(dev->dev, "dma_alloc_coherent failed\n");
goto alloc_buffer_failed;
}
ret = msm_slim_connect_endp(dev, endpoint);
if (!ret)
return 0;
msm_slim_sps_mem_free(dev, mem);
alloc_buffer_failed:
msm_slim_sps_mem_free(dev, descr);
alloc_descr_failed:
msm_slim_free_endpoint(endpoint);
sps_init_endpoint_failed:
dev->use_rx_msgqs = MSM_MSGQ_DISABLED;
return ret;
}
static int msm_slim_init_tx_msgq(struct msm_slim_ctrl *dev, u32 pipe_reg)
{
int ret;
u32 pipe_offset;
struct msm_slim_endp *endpoint = &dev->tx_msgq;
struct sps_connect *config = &endpoint->config;
struct sps_mem_buffer *descr = &config->desc;
struct sps_mem_buffer *mem = &endpoint->buf;
if (dev->use_tx_msgqs == MSM_MSGQ_DISABLED)
return 0;
/* Allocate the endpoint */
ret = msm_slim_init_endpoint(dev, endpoint);
if (ret) {
dev_err(dev->dev, "init_endpoint failed 0x%x\n", ret);
goto sps_init_endpoint_failed;
}
/* Get the pipe indices for the message queues */
pipe_offset = (readl_relaxed(dev->base + pipe_reg) & P_OFF_MASK) >> 2;
pipe_offset += 1;
dev_dbg(dev->dev, "TX Message queue pipe offset %d\n", pipe_offset);
config->mode = SPS_MODE_DEST;
config->source = SPS_DEV_HANDLE_MEM;
config->destination = dev->bam.hdl;
config->dest_pipe_index = pipe_offset;
config->src_pipe_index = 0;
config->options = SPS_O_ERROR | SPS_O_NO_Q |
SPS_O_ACK_TRANSFERS | SPS_O_AUTO_ENABLE;
/* Desc and TX buf are circular queues */
/* Allocate memory for the FIFO descriptors */
ret = msm_slim_sps_mem_alloc(dev, descr,
(MSM_TX_BUFS + 1) * sizeof(struct sps_iovec));
if (ret) {
dev_err(dev->dev, "unable to allocate SPS descriptors\n");
goto alloc_descr_failed;
}
/* Allocate TX buffer from which descriptors are created */
ret = msm_slim_sps_mem_alloc(dev, mem, ((MSM_TX_BUFS + 1) *
SLIM_MSGQ_BUF_LEN));
if (ret) {
dev_err(dev->dev, "dma_alloc_coherent failed\n");
goto alloc_buffer_failed;
}
ret = msm_slim_connect_endp(dev, endpoint);
if (!ret)
return 0;
msm_slim_sps_mem_free(dev, mem);
alloc_buffer_failed:
msm_slim_sps_mem_free(dev, descr);
alloc_descr_failed:
msm_slim_free_endpoint(endpoint);
sps_init_endpoint_failed:
dev->use_tx_msgqs = MSM_MSGQ_DISABLED;
return ret;
}
static int msm_slim_data_port_assign(struct msm_slim_ctrl *dev)
{
int i, data_ports = 0;
/* First 7 bits are for message Qs */
for (i = 7; i < 32; i++) {
/* Check what pipes are owned by Apps. */
if ((dev->pdata.apps_pipes >> i) & 0x1) {
if (dev->pipes)
dev->pipes[data_ports].port_b = i - 7;
data_ports++;
}
}
return data_ports;
}
/* Registers BAM h/w resource with SPS driver and initializes msgq endpoints */
int msm_slim_sps_init(struct msm_slim_ctrl *dev, struct resource *bam_mem,
u32 pipe_reg, bool remote)
{
int ret;
unsigned long bam_handle;
struct sps_bam_props bam_props = {0};
static struct sps_bam_sec_config_props sec_props = {
.ees = {
[0] = { /* LPASS */
.vmid = 0,
.pipe_mask = 0xFFFF98,
},
[1] = { /* Krait Apps */
.vmid = 1,
.pipe_mask = 0x3F000007,
},
[2] = { /* Modem */
.vmid = 2,
.pipe_mask = 0x00000060,
},
},
};
if (dev->bam.hdl) {
bam_handle = dev->bam.hdl;
goto init_pipes;
}
bam_props.ee = dev->ee;
bam_props.virt_addr = dev->bam.base;
bam_props.phys_addr = bam_mem->start;
bam_props.irq = dev->bam.irq;
if (!remote) {
bam_props.manage = SPS_BAM_MGR_LOCAL;
bam_props.sec_config = SPS_BAM_SEC_DO_CONFIG;
} else {
bam_props.manage = SPS_BAM_MGR_DEVICE_REMOTE |
SPS_BAM_MGR_MULTI_EE;
bam_props.sec_config = SPS_BAM_SEC_DO_NOT_CONFIG;
}
bam_props.summing_threshold = MSM_SLIM_PERF_SUMM_THRESHOLD;
bam_props.p_sec_config_props = &sec_props;
bam_props.options = SPS_O_DESC_DONE | SPS_O_ERROR |
SPS_O_ACK_TRANSFERS | SPS_O_AUTO_ENABLE;
/* override apps channel pipes if specified in platform-data or DT */
if (dev->pdata.apps_pipes)
sec_props.ees[dev->ee].pipe_mask = dev->pdata.apps_pipes;
/* Register the BAM device with the SPS driver */
ret = sps_register_bam_device(&bam_props, &bam_handle);
if (ret) {
dev_err(dev->dev, "disabling BAM: reg-bam failed 0x%x\n", ret);
dev->use_rx_msgqs = MSM_MSGQ_DISABLED;
dev->use_tx_msgqs = MSM_MSGQ_DISABLED;
return ret;
}
dev->bam.hdl = bam_handle;
dev_dbg(dev->dev, "SLIM BAM registered, handle = 0x%lx\n", bam_handle);
init_pipes:
if (dev->port_nums)
goto init_msgq;
/* get the # of ports first */
dev->port_nums = msm_slim_data_port_assign(dev);
if (dev->port_nums && !dev->pipes) {
dev->pipes = kzalloc(sizeof(struct msm_slim_endp) *
dev->port_nums,
GFP_KERNEL);
if (IS_ERR_OR_NULL(dev->pipes)) {
dev_err(dev->dev, "no memory for data ports");
sps_deregister_bam_device(bam_handle);
return PTR_ERR(dev->pipes);
}
/* assign the ports now */
msm_slim_data_port_assign(dev);
}
init_msgq:
ret = msm_slim_iommu_attach(dev);
if (ret) {
sps_deregister_bam_device(bam_handle);
return ret;
}
ret = msm_slim_init_rx_msgq(dev, pipe_reg);
if (ret)
dev_err(dev->dev, "msm_slim_init_rx_msgq failed 0x%x\n", ret);
if (ret && bam_handle)
dev->use_rx_msgqs = MSM_MSGQ_DISABLED;
ret = msm_slim_init_tx_msgq(dev, pipe_reg);
if (ret)
dev_err(dev->dev, "msm_slim_init_tx_msgq failed 0x%x\n", ret);
if (ret && bam_handle)
dev->use_tx_msgqs = MSM_MSGQ_DISABLED;
/*
* If command interface for BAM fails, register interface is used for
* commands.
* It is possible that other BAM usecases (e.g. apps channels) will
* still need BAM. Since BAM is successfully initialized, we can
* continue using it for non-command use cases.
*/
return 0;
}
void msm_slim_disconnect_endp(struct msm_slim_ctrl *dev,
struct msm_slim_endp *endpoint,
enum msm_slim_msgq *msgq_flag)
{
if (*msgq_flag >= MSM_MSGQ_ENABLED) {
sps_disconnect(endpoint->sps);
*msgq_flag = MSM_MSGQ_RESET;
}
}
static int msm_slim_discard_rx_data(struct msm_slim_ctrl *dev,
struct msm_slim_endp *endpoint)
{
struct sps_iovec sio;
int desc_num = 0, ret = 0;
ret = sps_get_unused_desc_num(endpoint->sps, &desc_num);
if (ret) {
dev_err(dev->dev, "sps_get_iovec() failed 0x%x\n", ret);
return ret;
}
while (desc_num--)
sps_get_iovec(endpoint->sps, &sio);
return ret;
}
static void msm_slim_remove_ep(struct msm_slim_ctrl *dev,
struct msm_slim_endp *endpoint,
enum msm_slim_msgq *msgq_flag)
{
struct sps_connect *config = &endpoint->config;
struct sps_mem_buffer *descr = &config->desc;
struct sps_mem_buffer *mem = &endpoint->buf;
msm_slim_sps_mem_free(dev, mem);
msm_slim_sps_mem_free(dev, descr);
msm_slim_free_endpoint(endpoint);
}
void msm_slim_deinit_ep(struct msm_slim_ctrl *dev,
struct msm_slim_endp *endpoint,
enum msm_slim_msgq *msgq_flag)
{
int ret = 0;
struct sps_connect *config = &endpoint->config;
if (*msgq_flag == MSM_MSGQ_ENABLED) {
if (config->mode == SPS_MODE_SRC) {
ret = msm_slim_discard_rx_data(dev, endpoint);
if (ret)
SLIM_WARN(dev, "discarding Rx data failed\n");
}
msm_slim_disconnect_endp(dev, endpoint, msgq_flag);
msm_slim_remove_ep(dev, endpoint, msgq_flag);
}
}
static void msm_slim_sps_unreg_event(struct sps_pipe *sps)
{
struct sps_register_event sps_event;
memset(&sps_event, 0x00, sizeof(sps_event));
/* Disable interrupt and signal notification for Rx/Tx pipe */
sps_register_event(sps, &sps_event);
}
void msm_slim_sps_exit(struct msm_slim_ctrl *dev, bool dereg)
{
int i;
if (dev->use_rx_msgqs >= MSM_MSGQ_ENABLED)
msm_slim_sps_unreg_event(dev->rx_msgq.sps);
if (dev->use_tx_msgqs >= MSM_MSGQ_ENABLED)
msm_slim_sps_unreg_event(dev->tx_msgq.sps);
for (i = 0; i < dev->port_nums; i++) {
if (dev->pipes[i].connected)
msm_slim_disconn_pipe_port(dev, i);
}
if (dereg) {
for (i = 0; i < dev->port_nums; i++) {
if (dev->pipes[i].connected)
msm_dealloc_port(&dev->ctrl, i);
}
sps_deregister_bam_device(dev->bam.hdl);
dev->bam.hdl = 0L;
kfree(dev->pipes);
dev->pipes = NULL;
}
dev->port_nums = 0;
}
/* Slimbus QMI Messaging */
#define SLIMBUS_QMI_SELECT_INSTANCE_REQ_V01 0x0020
#define SLIMBUS_QMI_SELECT_INSTANCE_RESP_V01 0x0020
#define SLIMBUS_QMI_POWER_REQ_V01 0x0021
#define SLIMBUS_QMI_POWER_RESP_V01 0x0021
#define SLIMBUS_QMI_CHECK_FRAMER_STATUS_REQ 0x0022
#define SLIMBUS_QMI_CHECK_FRAMER_STATUS_RESP 0x0022
#define SLIMBUS_QMI_DEFERRED_STATUS_REQ 0x0023
#define SLIMBUS_QMI_DEFERRED_STATUS_RESP 0x0023
#define SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN 14
#define SLIMBUS_QMI_POWER_RESP_MAX_MSG_LEN 7
#define SLIMBUS_QMI_SELECT_INSTANCE_REQ_MAX_MSG_LEN 14
#define SLIMBUS_QMI_SELECT_INSTANCE_RESP_MAX_MSG_LEN 7
#define SLIMBUS_QMI_CHECK_FRAMER_STAT_RESP_MAX_MSG_LEN 7
#define SLIMBUS_QMI_DEFERRED_STATUS_REQ_MSG_MAX_MSG_LEN 0
#define SLIMBUS_QMI_DEFERRED_STATUS_RESP_STAT_MSG_MAX_MSG_LEN 7
enum slimbus_mode_enum_type_v01 {
/* To force a 32 bit signed enum. Do not change or use*/
SLIMBUS_MODE_ENUM_TYPE_MIN_ENUM_VAL_V01 = INT_MIN,
SLIMBUS_MODE_SATELLITE_V01 = 1,
SLIMBUS_MODE_MASTER_V01 = 2,
SLIMBUS_MODE_ENUM_TYPE_MAX_ENUM_VAL_V01 = INT_MAX,
};
enum slimbus_pm_enum_type_v01 {
/* To force a 32 bit signed enum. Do not change or use*/
SLIMBUS_PM_ENUM_TYPE_MIN_ENUM_VAL_V01 = INT_MIN,
SLIMBUS_PM_INACTIVE_V01 = 1,
SLIMBUS_PM_ACTIVE_V01 = 2,
SLIMBUS_PM_ENUM_TYPE_MAX_ENUM_VAL_V01 = INT_MAX,
};
enum slimbus_resp_enum_type_v01 {
SLIMBUS_RESP_ENUM_TYPE_MIN_VAL_V01 = INT_MIN,
SLIMBUS_RESP_SYNCHRONOUS_V01 = 1,
SLIMBUS_RESP_DEFERRED_V01 = 2,
SLIMBUS_RESP_ENUM_TYPE_MAX_VAL_V01 = INT_MAX,
};
struct slimbus_select_inst_req_msg_v01 {
/* Mandatory */
/* Hardware Instance Selection */
uint32_t instance;
/* Optional */
/* Optional Mode Request Operation */
/* Must be set to true if mode is being passed */
uint8_t mode_valid;
enum slimbus_mode_enum_type_v01 mode;
};
struct slimbus_select_inst_resp_msg_v01 {
/* Mandatory */
/* Result Code */
struct qmi_response_type_v01 resp;
};
struct slimbus_power_req_msg_v01 {
/* Mandatory */
/* Power Request Operation */
enum slimbus_pm_enum_type_v01 pm_req;
/* Optional */
/* Optional Deferred Response type Operation */
/* Must be set to true if type is being passed */
uint8_t resp_type_valid;
enum slimbus_resp_enum_type_v01 resp_type;
};
struct slimbus_power_resp_msg_v01 {
/* Mandatory */
/* Result Code */
struct qmi_response_type_v01 resp;
};
struct slimbus_chkfrm_resp_msg {
/* Mandatory */
/* Result Code */
struct qmi_response_type_v01 resp;
};
struct slimbus_deferred_status_resp {
struct qmi_response_type_v01 resp;
};
static struct elem_info slimbus_select_inst_req_msg_v01_ei[] = {
{
.data_type = QMI_UNSIGNED_4_BYTE,
.elem_len = 1,
.elem_size = sizeof(uint32_t),
.is_array = NO_ARRAY,
.tlv_type = 0x01,
.offset = offsetof(struct slimbus_select_inst_req_msg_v01,
instance),
.ei_array = NULL,
},
{
.data_type = QMI_OPT_FLAG,
.elem_len = 1,
.elem_size = sizeof(uint8_t),
.is_array = NO_ARRAY,
.tlv_type = 0x10,
.offset = offsetof(struct slimbus_select_inst_req_msg_v01,
mode_valid),
.ei_array = NULL,
},
{
.data_type = QMI_UNSIGNED_4_BYTE,
.elem_len = 1,
.elem_size = sizeof(enum slimbus_mode_enum_type_v01),
.is_array = NO_ARRAY,
.tlv_type = 0x10,
.offset = offsetof(struct slimbus_select_inst_req_msg_v01,
mode),
.ei_array = NULL,
},
{
.data_type = QMI_EOTI,
.elem_len = 0,
.elem_size = 0,
.is_array = NO_ARRAY,
.tlv_type = 0x00,
.offset = 0,
.ei_array = NULL,
},
};
static struct elem_info slimbus_select_inst_resp_msg_v01_ei[] = {
{
.data_type = QMI_STRUCT,
.elem_len = 1,
.elem_size = sizeof(struct qmi_response_type_v01),
.is_array = NO_ARRAY,
.tlv_type = 0x02,
.offset = offsetof(struct slimbus_select_inst_resp_msg_v01,
resp),
.ei_array = get_qmi_response_type_v01_ei(),
},
{
.data_type = QMI_EOTI,
.elem_len = 0,
.elem_size = 0,
.is_array = NO_ARRAY,
.tlv_type = 0x00,
.offset = 0,
.ei_array = NULL,
},
};
static struct elem_info slimbus_power_req_msg_v01_ei[] = {
{
.data_type = QMI_UNSIGNED_4_BYTE,
.elem_len = 1,
.elem_size = sizeof(enum slimbus_pm_enum_type_v01),
.is_array = NO_ARRAY,
.tlv_type = 0x01,
.offset = offsetof(struct slimbus_power_req_msg_v01, pm_req),
.ei_array = NULL,
},
{
.data_type = QMI_OPT_FLAG,
.elem_len = 1,
.elem_size = sizeof(uint8_t),
.is_array = NO_ARRAY,
.tlv_type = 0x10,
.offset = offsetof(struct slimbus_power_req_msg_v01,
resp_type_valid),
},
{
.data_type = QMI_SIGNED_4_BYTE_ENUM,
.elem_len = 1,
.elem_size = sizeof(enum slimbus_resp_enum_type_v01),
.is_array = NO_ARRAY,
.tlv_type = 0x10,
.offset = offsetof(struct slimbus_power_req_msg_v01,
resp_type),
},
{
.data_type = QMI_EOTI,
.elem_len = 0,
.elem_size = 0,
.is_array = NO_ARRAY,
.tlv_type = 0x00,
.offset = 0,
.ei_array = NULL,
},
};
static struct elem_info slimbus_power_resp_msg_v01_ei[] = {
{
.data_type = QMI_STRUCT,
.elem_len = 1,
.elem_size = sizeof(struct qmi_response_type_v01),
.is_array = NO_ARRAY,
.tlv_type = 0x02,
.offset = offsetof(struct slimbus_power_resp_msg_v01, resp),
.ei_array = get_qmi_response_type_v01_ei(),
},
{
.data_type = QMI_EOTI,
.elem_len = 0,
.elem_size = 0,
.is_array = NO_ARRAY,
.tlv_type = 0x00,
.offset = 0,
.ei_array = NULL,
},
};
static struct elem_info slimbus_chkfrm_resp_msg_v01_ei[] = {
{
.data_type = QMI_STRUCT,
.elem_len = 1,
.elem_size = sizeof(struct qmi_response_type_v01),
.is_array = NO_ARRAY,
.tlv_type = 0x02,
.offset = offsetof(struct slimbus_chkfrm_resp_msg, resp),
.ei_array = get_qmi_response_type_v01_ei(),
},
{
.data_type = QMI_EOTI,
.elem_len = 0,
.elem_size = 0,
.is_array = NO_ARRAY,
.tlv_type = 0x00,
.offset = 0,
.ei_array = NULL,
},
};
static struct elem_info slimbus_deferred_status_resp_msg_v01_ei[] = {
{
.data_type = QMI_STRUCT,
.elem_len = 1,
.elem_size = sizeof(struct qmi_response_type_v01),
.is_array = NO_ARRAY,
.tlv_type = 0x02,
.offset = offsetof(struct slimbus_deferred_status_resp,
resp),
.ei_array = get_qmi_response_type_v01_ei(),
},
{
.data_type = QMI_EOTI,
.is_array = NO_ARRAY,
},
};
static void msm_slim_qmi_recv_msg(struct kthread_work *work)
{
int rc;
struct msm_slim_qmi *qmi =
container_of(work, struct msm_slim_qmi, kwork);
/* Drain all packets received */
do {
rc = qmi_recv_msg(qmi->handle);
} while (rc == 0);
if (rc != -ENOMSG)
pr_err("%s: Error receiving QMI message:%d\n", __func__, rc);
}
static void msm_slim_qmi_notify(struct qmi_handle *handle,
enum qmi_event_type event, void *notify_priv)
{
struct msm_slim_ctrl *dev = notify_priv;
struct msm_slim_qmi *qmi = &dev->qmi;
switch (event) {
case QMI_RECV_MSG:
kthread_queue_work(&qmi->kworker, &qmi->kwork);
break;
default:
break;
}
}
static const char *get_qmi_error(struct qmi_response_type_v01 *r)
{
if (r->result == QMI_RESULT_SUCCESS_V01 || r->error == QMI_ERR_NONE_V01)
return "No Error";
else if (r->error == QMI_ERR_NO_MEMORY_V01)
return "Out of Memory";
else if (r->error == QMI_ERR_INTERNAL_V01)
return "Unexpected error occurred";
else if (r->error == QMI_ERR_INCOMPATIBLE_STATE_V01)
return "Slimbus s/w already configured to a different mode";
else if (r->error == QMI_ERR_INVALID_ID_V01)
return "Slimbus hardware instance is not valid";
else
return "Unknown error";
}
static int msm_slim_qmi_send_select_inst_req(struct msm_slim_ctrl *dev,
struct slimbus_select_inst_req_msg_v01 *req)
{
struct slimbus_select_inst_resp_msg_v01 resp = { { 0, 0 } };
struct msg_desc req_desc, resp_desc;
int rc;
req_desc.msg_id = SLIMBUS_QMI_SELECT_INSTANCE_REQ_V01;
req_desc.max_msg_len = SLIMBUS_QMI_SELECT_INSTANCE_REQ_MAX_MSG_LEN;
req_desc.ei_array = slimbus_select_inst_req_msg_v01_ei;
resp_desc.msg_id = SLIMBUS_QMI_SELECT_INSTANCE_RESP_V01;
resp_desc.max_msg_len = SLIMBUS_QMI_SELECT_INSTANCE_RESP_MAX_MSG_LEN;
resp_desc.ei_array = slimbus_select_inst_resp_msg_v01_ei;
rc = qmi_send_req_wait(dev->qmi.handle, &req_desc, req, sizeof(*req),
&resp_desc, &resp, sizeof(resp), SLIM_QMI_RESP_TOUT);
if (rc < 0) {
SLIM_ERR(dev, "%s: QMI send req failed %d\n", __func__, rc);
return rc;
}
/* Check the response */
if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
SLIM_ERR(dev, "%s: QMI request failed 0x%x (%s)\n", __func__,
resp.resp.result, get_qmi_error(&resp.resp));
return -EREMOTEIO;
}
return 0;
}
static void slim_qmi_resp_cb(struct qmi_handle *handle, unsigned int msg_id,
void *msg, void *resp_cb_data, int stat)
{
struct slimbus_power_resp_msg_v01 *resp = msg;
struct msm_slim_ctrl *dev = resp_cb_data;
if (msg_id != SLIMBUS_QMI_POWER_RESP_V01)
SLIM_WARN(dev, "incorrect msg id in qmi-resp CB:0x%x", msg_id);
else if (resp->resp.result != QMI_RESULT_SUCCESS_V01)
SLIM_ERR(dev, "%s: QMI power failed 0x%x (%s)\n", __func__,
resp->resp.result, get_qmi_error(&resp->resp));
complete(&dev->qmi.defer_comp);
}
static int msm_slim_qmi_send_power_request(struct msm_slim_ctrl *dev,
struct slimbus_power_req_msg_v01 *req)
{
struct slimbus_power_resp_msg_v01 *resp =
(struct slimbus_power_resp_msg_v01 *)&dev->qmi.resp;
struct msg_desc req_desc;
struct msg_desc *resp_desc = &dev->qmi.resp_desc;
int rc;
req_desc.msg_id = SLIMBUS_QMI_POWER_REQ_V01;
req_desc.max_msg_len = SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN;
req_desc.ei_array = slimbus_power_req_msg_v01_ei;
resp_desc->msg_id = SLIMBUS_QMI_POWER_RESP_V01;
resp_desc->max_msg_len = SLIMBUS_QMI_POWER_RESP_MAX_MSG_LEN;
resp_desc->ei_array = slimbus_power_resp_msg_v01_ei;
if (dev->qmi.deferred_resp)
rc = qmi_send_req_nowait(dev->qmi.handle, &req_desc, req,
sizeof(*req), resp_desc, resp,
sizeof(*resp), slim_qmi_resp_cb, dev);
else
rc = qmi_send_req_wait(dev->qmi.handle, &req_desc, req,
sizeof(*req), resp_desc, resp,
sizeof(*resp), SLIM_QMI_RESP_TOUT);
if (rc < 0)
SLIM_ERR(dev, "%s: QMI send req failed %d\n", __func__, rc);
if (rc < 0 || dev->qmi.deferred_resp)
return rc;
/* Check the response */
if (resp->resp.result != QMI_RESULT_SUCCESS_V01) {
SLIM_ERR(dev, "%s: QMI request failed 0x%x (%s)\n", __func__,
resp->resp.result, get_qmi_error(&resp->resp));
return -EREMOTEIO;
}
return 0;
}
int msm_slim_qmi_init(struct msm_slim_ctrl *dev, bool apps_is_master)
{
int rc = 0;
struct qmi_handle *handle;
struct slimbus_select_inst_req_msg_v01 req;
if (dev->qmi.handle || dev->qmi.task) {
pr_err("%s: Destroying stale QMI client handle\n", __func__);
msm_slim_qmi_exit(dev);
}
kthread_init_worker(&dev->qmi.kworker);
init_completion(&dev->qmi.defer_comp);
dev->qmi.task = kthread_run(kthread_worker_fn,
&dev->qmi.kworker, "msm_slim_qmi_clnt%d", dev->ctrl.nr);
if (IS_ERR(dev->qmi.task)) {
pr_err("%s: Failed to create QMI client kthread\n", __func__);
return -ENOMEM;
}
kthread_init_work(&dev->qmi.kwork, msm_slim_qmi_recv_msg);
handle = qmi_handle_create(msm_slim_qmi_notify, dev);
if (!handle) {
rc = -ENOMEM;
pr_err("%s: QMI client handle alloc failed\n", __func__);
goto qmi_handle_create_failed;
}
rc = qmi_connect_to_service(handle, SLIMBUS_QMI_SVC_ID,
SLIMBUS_QMI_SVC_V1,
SLIMBUS_QMI_INS_ID);
if (rc < 0) {
SLIM_ERR(dev, "%s: QMI server not found\n", __func__);
goto qmi_connect_to_service_failed;
}
/* Instance is 0 based */
req.instance = (dev->ctrl.nr >> 1);
req.mode_valid = 1;
/* Mode indicates the role of the ADSP */
if (apps_is_master)
req.mode = SLIMBUS_MODE_SATELLITE_V01;
else
req.mode = SLIMBUS_MODE_MASTER_V01;
dev->qmi.handle = handle;
rc = msm_slim_qmi_send_select_inst_req(dev, &req);
if (rc) {
pr_err("%s: failed to select h/w instance\n", __func__);
goto qmi_select_instance_failed;
}
return 0;
qmi_select_instance_failed:
dev->qmi.handle = NULL;
qmi_connect_to_service_failed:
qmi_handle_destroy(handle);
qmi_handle_create_failed:
kthread_flush_worker(&dev->qmi.kworker);
kthread_stop(dev->qmi.task);
dev->qmi.task = NULL;
return rc;
}
void msm_slim_qmi_exit(struct msm_slim_ctrl *dev)
{
if (!dev->qmi.handle || !dev->qmi.task)
return;
qmi_handle_destroy(dev->qmi.handle);
kthread_flush_worker(&dev->qmi.kworker);
kthread_stop(dev->qmi.task);
dev->qmi.task = NULL;
dev->qmi.handle = NULL;
}
int msm_slim_qmi_power_request(struct msm_slim_ctrl *dev, bool active)
{
struct slimbus_power_req_msg_v01 req;
if (active)
req.pm_req = SLIMBUS_PM_ACTIVE_V01;
else
req.pm_req = SLIMBUS_PM_INACTIVE_V01;
if (dev->qmi.deferred_resp) {
req.resp_type = SLIMBUS_RESP_DEFERRED_V01;
req.resp_type_valid = 1;
} else {
req.resp_type_valid = 0;
}
return msm_slim_qmi_send_power_request(dev, &req);
}
int msm_slim_qmi_check_framer_request(struct msm_slim_ctrl *dev)
{
struct slimbus_chkfrm_resp_msg resp = { { 0, 0 } };
struct msg_desc req_desc, resp_desc;
int rc;
req_desc.msg_id = SLIMBUS_QMI_CHECK_FRAMER_STATUS_REQ;
req_desc.max_msg_len = 0;
req_desc.ei_array = NULL;
resp_desc.msg_id = SLIMBUS_QMI_CHECK_FRAMER_STATUS_RESP;
resp_desc.max_msg_len = SLIMBUS_QMI_CHECK_FRAMER_STAT_RESP_MAX_MSG_LEN;
resp_desc.ei_array = slimbus_chkfrm_resp_msg_v01_ei;
rc = qmi_send_req_wait(dev->qmi.handle, &req_desc, NULL, 0,
&resp_desc, &resp, sizeof(resp), SLIM_QMI_RESP_TOUT);
if (rc < 0) {
SLIM_ERR(dev, "%s: QMI send req failed %d\n", __func__, rc);
return rc;
}
/* Check the response */
if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
SLIM_ERR(dev, "%s: QMI request failed 0x%x (%s)\n",
__func__, resp.resp.result, get_qmi_error(&resp.resp));
return -EREMOTEIO;
}
return 0;
}
int msm_slim_qmi_deferred_status_req(struct msm_slim_ctrl *dev)
{
struct slimbus_deferred_status_resp resp = { { 0, 0 } };
struct msg_desc req_desc, resp_desc;
int rc;
req_desc.msg_id = SLIMBUS_QMI_DEFERRED_STATUS_REQ;
req_desc.max_msg_len = 0;
req_desc.ei_array = NULL;
resp_desc.msg_id = SLIMBUS_QMI_DEFERRED_STATUS_RESP;
resp_desc.max_msg_len =
SLIMBUS_QMI_DEFERRED_STATUS_RESP_STAT_MSG_MAX_MSG_LEN;
resp_desc.ei_array = slimbus_deferred_status_resp_msg_v01_ei;
rc = qmi_send_req_wait(dev->qmi.handle, &req_desc, NULL, 0,
&resp_desc, &resp, sizeof(resp), SLIM_QMI_RESP_TOUT);
if (rc < 0) {
SLIM_ERR(dev, "%s: QMI send req failed %d\n", __func__, rc);
return rc;
}
/* Check the response */
if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
SLIM_ERR(dev, "%s: QMI request failed 0x%x (%s)\n",
__func__, resp.resp.result, get_qmi_error(&resp.resp));
return -EREMOTEIO;
}
/* wait for the deferred response */
rc = wait_for_completion_timeout(&dev->qmi.defer_comp, HZ);
if (rc == 0) {
SLIM_WARN(dev, "slimbus power deferred response not rcvd\n");
return -ETIMEDOUT;
}
/* Check what response we got in callback */
if (dev->qmi.resp.result != QMI_RESULT_SUCCESS_V01) {
SLIM_WARN(dev, "QMI power req failed in CB");
return -EREMOTEIO;
}
return 0;
}