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M7350/kernel/drivers/platform/msm/usb_bam.c
T f75098198c M7350v5_en_gpl
2024-09-09 08:57:42 +00:00

3494 lines
100 KiB
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/* Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/stat.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/usb/msm_hsusb.h>
#include <linux/msm-sps.h>
#include <linux/ipa.h>
#include <linux/usb_bam.h>
#include <linux/workqueue.h>
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#define USB_THRESHOLD 512
#define USB_BAM_MAX_STR_LEN 50
#define USB_BAM_TIMEOUT (10*HZ)
#define DBG_MAX_MSG 512UL
#define DBG_MSG_LEN 160UL
#define TIME_BUF_LEN 17
#define DBG_EVENT_LEN 143
#define USB_BAM_NR_PORTS 4
/* Additional memory to be allocated than required data fifo size */
#define DATA_FIFO_EXTRA_MEM_ALLOC_SIZE 512
#define ARRAY_INDEX_FROM_ADDR(base, addr) ((addr) - (base))
#define ENABLE_EVENT_LOG 1
static unsigned int enable_event_log = ENABLE_EVENT_LOG;
module_param(enable_event_log, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(enable_event_log, "enable event logging in debug buffer");
#define LOGLEVEL_NONE 8
#define LOGLEVEL_DEBUG 7
#define LOGLEVEL_ERR 3
#define log_event(log_level, x...) \
do { \
unsigned long flags; \
char *buf; \
if (log_level == LOGLEVEL_DEBUG) \
pr_debug(x); \
else if (log_level == LOGLEVEL_ERR) \
pr_err(x); \
if (enable_event_log) { \
write_lock_irqsave(&usb_bam_dbg.lck, flags); \
buf = usb_bam_dbg.buf[usb_bam_dbg.idx]; \
put_timestamp(buf); \
snprintf(&buf[TIME_BUF_LEN - 1], DBG_EVENT_LEN, x); \
usb_bam_dbg.idx = (usb_bam_dbg.idx + 1) % DBG_MAX_MSG; \
write_unlock_irqrestore(&usb_bam_dbg.lck, flags); \
} \
} while (0)
#define log_event_none(x, ...) log_event(LOGLEVEL_NONE, x, ##__VA_ARGS__)
#define log_event_dbg(x, ...) log_event(LOGLEVEL_DEBUG, x, ##__VA_ARGS__)
#define log_event_err(x, ...) log_event(LOGLEVEL_ERR, x, ##__VA_ARGS__)
struct usb_bam_sps_type {
struct sps_pipe **sps_pipes;
struct sps_connect *sps_connections;
};
/**
* struct usb_bam_ctx_type - represents the usb bam driver entity
* @usb_bam_sps: holds the sps pipes the usb bam driver holds
* against the sps driver.
* @usb_bam_pdev: the platfrom device that represents the usb bam.
* @usb_bam_wq: Worqueue used for managing states of reset against
* a peer bam.
* @max_connections: The maximum number of pipes that are configured
* in the platform data.
* @h_bam: This array stores for each BAM ("ssusb", "hsusb" or "hsic") the
* handle/device of the sps driver.
* @pipes_enabled_per_bam: This array stores for each BAM
* ("ssusb", "hsusb" or "hsic") the number of pipes currently enabled.
* @inactivity_timer_ms: The timeout configuration per each bam for inactivity
* timer feature.
* @is_bam_inactivity: Is there no activity on all pipes belongs to a
* specific bam. (no activity = no data is pulled or pushed
* from/into ones of the pipes).
* @usb_bam_connections: array (allocated on probe) having all BAM connections
* @usb_bam_lock: to protect fields of ctx or usb_bam_connections
*/
struct usb_bam_ctx_type {
struct usb_bam_sps_type usb_bam_sps;
struct resource *io_res;
void __iomem *regs;
int irq;
struct platform_device *usb_bam_pdev;
struct workqueue_struct *usb_bam_wq;
u8 max_connections;
unsigned long h_bam;
u8 pipes_enabled_per_bam;
u32 inactivity_timer_ms;
bool is_bam_inactivity;
struct usb_bam_pipe_connect *usb_bam_connections;
spinlock_t usb_bam_lock;
};
static char *bam_enable_strings[MAX_BAMS] = {
[DWC3_CTRL] = "ssusb",
[CI_CTRL] = "hsusb",
[HSIC_CTRL] = "hsic",
};
/*
* CI_CTRL & DWC3_CTRL shouldn't be used simultaneously
* since both share the same prod & cons rm resourses
*/
static enum ipa_client_type ipa_rm_resource_prod[MAX_BAMS] = {
[CI_CTRL] = IPA_RM_RESOURCE_USB_PROD,
[HSIC_CTRL] = IPA_RM_RESOURCE_HSIC_PROD,
[DWC3_CTRL] = IPA_RM_RESOURCE_USB_PROD,
};
static enum ipa_client_type ipa_rm_resource_cons[MAX_BAMS] = {
[CI_CTRL] = IPA_RM_RESOURCE_USB_CONS,
[HSIC_CTRL] = IPA_RM_RESOURCE_HSIC_CONS,
[DWC3_CTRL] = IPA_RM_RESOURCE_USB_CONS,
};
static int usb_cons_request_resource(void);
static int usb_cons_release_resource(void);
static int ss_usb_cons_request_resource(void);
static int ss_usb_cons_release_resource(void);
static int hsic_cons_request_resource(void);
static int hsic_cons_release_resource(void);
static int (*request_resource_cb[MAX_BAMS])(void) = {
[CI_CTRL] = usb_cons_request_resource,
[HSIC_CTRL] = hsic_cons_request_resource,
[DWC3_CTRL] = ss_usb_cons_request_resource,
};
static int (*release_resource_cb[MAX_BAMS])(void) = {
[CI_CTRL] = usb_cons_release_resource,
[HSIC_CTRL] = hsic_cons_release_resource,
[DWC3_CTRL] = ss_usb_cons_release_resource,
};
struct usb_bam_ipa_handshake_info {
enum ipa_rm_event cur_prod_state;
enum ipa_rm_event cur_cons_state;
enum usb_bam_mode cur_bam_mode;
enum usb_ctrl bam_type;
int connect_complete;
int bus_suspend;
bool disconnected;
bool in_lpm;
u8 prod_pipes_enabled_per_bam;
int (*wake_cb)(void *);
void *wake_param;
u32 suspend_src_idx[USB_BAM_NR_PORTS];
u32 suspend_dst_idx[USB_BAM_NR_PORTS];
u32 resume_src_idx[USB_BAM_NR_PORTS];
u32 resume_dst_idx[USB_BAM_NR_PORTS];
u32 pipes_to_suspend;
u32 pipes_suspended;
u32 pipes_resumed;
struct completion prod_avail;
struct completion prod_released;
struct mutex suspend_resume_mutex;
struct work_struct resume_work;
struct work_struct finish_suspend_work;
};
struct usb_bam_host_info {
struct device *dev;
bool in_lpm;
};
static spinlock_t usb_bam_ipa_handshake_info_lock;
static struct usb_bam_ipa_handshake_info info[MAX_BAMS];
static struct usb_bam_ctx_type msm_usb_bam[MAX_BAMS];
/* USB bam type used as a peer of the qdss in bam2bam mode */
static enum usb_ctrl qdss_usb_bam_type;
static struct usb_bam_host_info host_info[MAX_BAMS];
static int __usb_bam_register_wake_cb(enum usb_ctrl bam_type, int idx,
int (*callback)(void *user),
void *param, bool trigger_cb_per_pipe);
static void wait_for_prod_release(enum usb_ctrl cur_bam);
static void usb_bam_start_suspend(struct usb_bam_ipa_handshake_info *info_ptr);
static struct {
char buf[DBG_MAX_MSG][DBG_MSG_LEN]; /* buffer */
unsigned idx; /* index */
rwlock_t lck; /* lock */
} __maybe_unused usb_bam_dbg = {
.idx = 0,
.lck = __RW_LOCK_UNLOCKED(lck)
};
/*put_timestamp - writes time stamp to buffer */
static void __maybe_unused put_timestamp(char *tbuf)
{
unsigned long long t;
unsigned long nanosec_rem;
t = cpu_clock(smp_processor_id());
nanosec_rem = do_div(t, 1000000000)/1000;
snprintf(tbuf, TIME_BUF_LEN, "[%5lu.%06lu]: ", (unsigned long)t,
nanosec_rem);
}
void msm_bam_set_hsic_host_dev(struct device *dev)
{
if (dev) {
/* Hold the device until allowing lpm */
info[HSIC_CTRL].in_lpm = false;
log_event_dbg("%s: Getting hsic device %p\n", __func__, dev);
pm_runtime_get(dev);
} else if (host_info[HSIC_CTRL].dev) {
log_event_dbg("%s: Try Putting hsic device %p, lpm:%d\n",
__func__, host_info[HSIC_CTRL].dev,
info[HSIC_CTRL].in_lpm);
/* Just release previous device if not already done */
if (!info[HSIC_CTRL].in_lpm) {
info[HSIC_CTRL].in_lpm = true;
pm_runtime_put(host_info[HSIC_CTRL].dev);
}
}
host_info[HSIC_CTRL].dev = dev;
host_info[HSIC_CTRL].in_lpm = false;
}
void msm_bam_set_usb_host_dev(struct device *dev)
{
host_info[CI_CTRL].dev = dev;
host_info[CI_CTRL].in_lpm = false;
}
static int get_bam_type_from_core_name(const char *name)
{
if (strnstr(name, bam_enable_strings[DWC3_CTRL],
USB_BAM_MAX_STR_LEN) ||
strnstr(name, "dwc3", USB_BAM_MAX_STR_LEN))
return DWC3_CTRL;
else if (strnstr(name, bam_enable_strings[HSIC_CTRL],
USB_BAM_MAX_STR_LEN) ||
strnstr(name, "ci13xxx_msm_hsic", USB_BAM_MAX_STR_LEN))
return HSIC_CTRL;
else if (strnstr(name, bam_enable_strings[CI_CTRL],
USB_BAM_MAX_STR_LEN) ||
strnstr(name, "ci", USB_BAM_MAX_STR_LEN))
return CI_CTRL;
log_event_err("%s: invalid BAM name(%s)\n", __func__, name);
return -EINVAL;
}
static void usb_bam_set_inactivity_timer(enum usb_ctrl bam)
{
struct sps_timer_ctrl timer_ctrl;
struct usb_bam_pipe_connect *pipe_connect;
struct sps_pipe *pipe = NULL;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam];
int i;
log_event_dbg("%s: enter\n", __func__);
/*
* Since we configure global incativity timer for all pipes
* and not per each pipe, it is enough to use some pipe
* handle associated with this bam, so just find the first one.
* This pipe handle is required due to SPS driver API we use below.
*/
for (i = 0; i < ctx->max_connections; i++) {
pipe_connect = &ctx->usb_bam_connections[i];
if (pipe_connect->bam_type == bam && pipe_connect->enabled) {
pipe = ctx->usb_bam_sps.sps_pipes[i];
break;
}
}
if (!pipe) {
pr_warning("%s: Bam %s has no connected pipes\n", __func__,
bam_enable_strings[bam]);
return;
}
timer_ctrl.op = SPS_TIMER_OP_CONFIG;
timer_ctrl.mode = SPS_TIMER_MODE_ONESHOT;
timer_ctrl.timeout_msec = ctx->inactivity_timer_ms;
sps_timer_ctrl(pipe, &timer_ctrl, NULL);
timer_ctrl.op = SPS_TIMER_OP_RESET;
sps_timer_ctrl(pipe, &timer_ctrl, NULL);
}
static int usb_bam_alloc_buffer(struct usb_bam_pipe_connect *pipe_connect)
{
int ret = 0;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[pipe_connect->bam_type];
struct msm_usb_bam_platform_data *pdata =
ctx->usb_bam_pdev->dev.platform_data;
struct sps_mem_buffer *data_buf = &(pipe_connect->data_mem_buf);
struct sps_mem_buffer *desc_buf = &(pipe_connect->desc_mem_buf);
pr_debug("%s: data_fifo size:%x desc_fifo_size:%x\n",
__func__, pipe_connect->data_fifo_size,
pipe_connect->desc_fifo_size);
switch (pipe_connect->mem_type) {
case SPS_PIPE_MEM:
log_event_dbg("%s: USB BAM using SPS pipe memory\n", __func__);
ret = sps_setup_bam2bam_fifo(data_buf,
pipe_connect->data_fifo_base_offset,
pipe_connect->data_fifo_size, 1);
if (ret) {
log_event_err("%s: data fifo setup failure %d\n",
__func__, ret);
goto err_exit;
}
ret = sps_setup_bam2bam_fifo(desc_buf,
pipe_connect->desc_fifo_base_offset,
pipe_connect->desc_fifo_size, 1);
if (ret) {
log_event_err("%s: desc. fifo setup failure %d\n",
__func__, ret);
goto err_exit;
}
break;
case OCI_MEM:
if (pipe_connect->mem_type == OCI_MEM)
log_event_dbg("%s: USB BAM using ocimem\n", __func__);
data_buf->phys_base = pipe_connect->data_fifo_base_offset +
pdata->usb_bam_fifo_baseaddr;
data_buf->size = pipe_connect->data_fifo_size;
data_buf->base = ioremap(data_buf->phys_base, data_buf->size);
if (!data_buf->base) {
log_event_err("%s: ioremap failed for data fifo\n",
__func__);
ret = -ENOMEM;
goto err_exit;
}
memset_io(data_buf->base, 0, data_buf->size);
desc_buf->phys_base = pipe_connect->desc_fifo_base_offset +
pdata->usb_bam_fifo_baseaddr;
desc_buf->size = pipe_connect->desc_fifo_size;
desc_buf->base = ioremap(desc_buf->phys_base, desc_buf->size);
if (!desc_buf->base) {
log_event_err("%s: ioremap failed for desc fifo\n",
__func__);
iounmap(data_buf->base);
ret = -ENOMEM;
goto err_exit;
}
memset_io(desc_buf->base, 0, desc_buf->size);
break;
case SYSTEM_MEM:
log_event_dbg("%s: USB BAM using system memory\n", __func__);
/* BAM would use system memory, allocate FIFOs */
data_buf->size = pipe_connect->data_fifo_size;
/* On platforms which use CI controller, USB HW can fetch
* additional 128 bytes at the end of circular buffer when
* AXI prefetch is enabled and hence requirement is to
* allocate 512 bytes more than required length.
*/
if (pipe_connect->bam_type == CI_CTRL)
data_buf->base =
dma_alloc_coherent(&ctx->usb_bam_pdev->dev,
(pipe_connect->data_fifo_size +
DATA_FIFO_EXTRA_MEM_ALLOC_SIZE),
&(data_buf->phys_base),
GFP_KERNEL);
else
data_buf->base =
dma_alloc_coherent(&ctx->usb_bam_pdev->dev,
pipe_connect->data_fifo_size,
&(data_buf->phys_base),
GFP_KERNEL);
if (!data_buf->base) {
log_event_err("%s: dma_alloc_coherent failed for data fifo\n",
__func__);
ret = -ENOMEM;
goto err_exit;
}
memset(data_buf->base, 0, pipe_connect->data_fifo_size);
desc_buf->size = pipe_connect->desc_fifo_size;
desc_buf->base = dma_alloc_coherent(&ctx->usb_bam_pdev->dev,
pipe_connect->desc_fifo_size,
&(desc_buf->phys_base),
GFP_KERNEL);
if (!desc_buf->base) {
log_event_err("%s: dma_alloc_coherent failed for desc fifo\n",
__func__);
if (pipe_connect->bam_type == CI_CTRL)
dma_free_coherent(&ctx->usb_bam_pdev->dev,
(pipe_connect->data_fifo_size +
DATA_FIFO_EXTRA_MEM_ALLOC_SIZE),
data_buf->base,
data_buf->phys_base);
else
dma_free_coherent(&ctx->usb_bam_pdev->dev,
pipe_connect->data_fifo_size,
data_buf->base,
data_buf->phys_base);
ret = -ENOMEM;
goto err_exit;
}
memset(desc_buf->base, 0, pipe_connect->desc_fifo_size);
break;
default:
log_event_err("%s: invalid mem type\n", __func__);
ret = -EINVAL;
}
return ret;
err_exit:
return ret;
}
static int connect_pipe(enum usb_ctrl cur_bam, u8 idx, u32 *usb_pipe_idx)
{
int ret;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
struct usb_bam_sps_type usb_bam_sps = ctx->usb_bam_sps;
struct sps_pipe **pipe = &(usb_bam_sps.sps_pipes[idx]);
struct sps_connect *sps_connection = &usb_bam_sps.sps_connections[idx];
struct usb_bam_pipe_connect *pipe_connect =
&ctx->usb_bam_connections[idx];
enum usb_bam_pipe_dir dir = pipe_connect->dir;
struct sps_mem_buffer *data_buf = &(pipe_connect->data_mem_buf);
struct sps_mem_buffer *desc_buf = &(pipe_connect->desc_mem_buf);
*pipe = sps_alloc_endpoint();
if (*pipe == NULL) {
log_event_err("%s: sps_alloc_endpoint failed\n", __func__);
return -ENOMEM;
}
ret = sps_get_config(*pipe, sps_connection);
if (ret) {
log_event_err("%s: tx get config failed %d\n", __func__, ret);
goto free_sps_endpoint;
}
ret = sps_phy2h(pipe_connect->src_phy_addr, &(sps_connection->source));
if (ret) {
log_event_err("%s: sps_phy2h failed (src BAM) %d\n",
__func__, ret);
goto free_sps_endpoint;
}
sps_connection->src_pipe_index = pipe_connect->src_pipe_index;
ret = sps_phy2h(pipe_connect->dst_phy_addr,
&(sps_connection->destination));
if (ret) {
log_event_err("%s: sps_phy2h failed (dst BAM) %d\n",
__func__, ret);
goto free_sps_endpoint;
}
sps_connection->dest_pipe_index = pipe_connect->dst_pipe_index;
if (dir == USB_TO_PEER_PERIPHERAL) {
sps_connection->mode = SPS_MODE_SRC;
*usb_pipe_idx = pipe_connect->src_pipe_index;
} else {
sps_connection->mode = SPS_MODE_DEST;
*usb_pipe_idx = pipe_connect->dst_pipe_index;
}
ret = usb_bam_alloc_buffer(pipe_connect);
if (ret) {
log_event_err("%s(): Error(%d) allocating buffer.\n",
__func__, ret);
return ret;
}
sps_connection->data = *data_buf;
sps_connection->desc = *desc_buf;
sps_connection->event_thresh = 16;
sps_connection->options = SPS_O_AUTO_ENABLE;
ret = sps_connect(*pipe, sps_connection);
if (ret < 0) {
log_event_err("%s: sps_connect failed %d\n", __func__, ret);
goto error;
}
return 0;
error:
sps_disconnect(*pipe);
free_sps_endpoint:
sps_free_endpoint(*pipe);
return ret;
}
static int connect_pipe_sys2bam_ipa(enum usb_ctrl cur_bam, u8 idx,
struct usb_bam_connect_ipa_params *ipa_params)
{
int ret;
enum usb_bam_pipe_dir dir = ipa_params->dir;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
struct usb_bam_pipe_connect *pipe_connect =
&ctx->usb_bam_connections[idx];
struct ipa_sys_connect_params sys_in_params;
unsigned long usb_handle;
phys_addr_t usb_phy_addr;
u32 clnt_hdl = 0;
memset(&sys_in_params, 0, sizeof(sys_in_params));
if (dir == USB_TO_PEER_PERIPHERAL) {
usb_phy_addr = pipe_connect->src_phy_addr;
sys_in_params.client = ipa_params->src_client;
ipa_params->ipa_cons_ep_idx =
ipa_get_ep_mapping(sys_in_params.client);
} else {
usb_phy_addr = pipe_connect->dst_phy_addr;
sys_in_params.client = ipa_params->dst_client;
ipa_params->ipa_prod_ep_idx =
ipa_get_ep_mapping(sys_in_params.client);
}
log_event_dbg("%s(): ipa_prod_ep_idx:%d ipa_cons_ep_idx:%d\n",
__func__, ipa_params->ipa_prod_ep_idx,
ipa_params->ipa_cons_ep_idx);
/* Get HSUSB / HSIC bam handle */
ret = sps_phy2h(usb_phy_addr, &usb_handle);
if (ret) {
log_event_err("%s: sps_phy2h failed (HSUSB/HSIC BAM) %d\n",
__func__, ret);
return ret;
}
pipe_connect->activity_notify = ipa_params->activity_notify;
pipe_connect->inactivity_notify = ipa_params->inactivity_notify;
pipe_connect->priv = ipa_params->priv;
/* IPA sys connection params */
sys_in_params.desc_fifo_sz = pipe_connect->desc_fifo_size;
sys_in_params.priv = ipa_params->priv;
sys_in_params.notify = ipa_params->notify;
sys_in_params.skip_ep_cfg = ipa_params->skip_ep_cfg;
sys_in_params.keep_ipa_awake = ipa_params->keep_ipa_awake;
memcpy(&sys_in_params.ipa_ep_cfg, &ipa_params->ipa_ep_cfg,
sizeof(struct ipa_ep_cfg));
ret = ipa_setup_sys_pipe(&sys_in_params, &clnt_hdl);
if (ret) {
log_event_err("%s: ipa_connect failed\n", __func__);
return ret;
}
pipe_connect->ipa_clnt_hdl = clnt_hdl;
if (dir == USB_TO_PEER_PERIPHERAL)
ipa_params->cons_clnt_hdl = clnt_hdl;
else
ipa_params->prod_clnt_hdl = clnt_hdl;
return 0;
}
static int connect_pipe_bam2bam_ipa(enum usb_ctrl cur_bam, u8 idx,
struct usb_bam_connect_ipa_params *ipa_params)
{
int ret;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
struct usb_bam_sps_type usb_bam_sps = ctx->usb_bam_sps;
enum usb_bam_pipe_dir dir = ipa_params->dir;
struct sps_pipe **pipe = &(usb_bam_sps.sps_pipes[idx]);
struct sps_connect *sps_connection = &usb_bam_sps.sps_connections[idx];
struct usb_bam_pipe_connect *pipe_connect =
&ctx->usb_bam_connections[idx];
struct sps_mem_buffer *data_buf = &(pipe_connect->data_mem_buf);
struct sps_mem_buffer *desc_buf = &(pipe_connect->desc_mem_buf);
struct ipa_connect_params ipa_in_params;
struct ipa_sps_params sps_out_params;
u32 usb_phy_addr;
unsigned long usb_handle;
u32 clnt_hdl = 0;
memset(&ipa_in_params, 0, sizeof(ipa_in_params));
memset(&sps_out_params, 0, sizeof(sps_out_params));
if (dir == USB_TO_PEER_PERIPHERAL) {
usb_phy_addr = pipe_connect->src_phy_addr;
ipa_in_params.client_ep_idx = pipe_connect->src_pipe_index;
ipa_in_params.client = ipa_params->src_client;
} else {
usb_phy_addr = pipe_connect->dst_phy_addr;
ipa_in_params.client_ep_idx = pipe_connect->dst_pipe_index;
ipa_in_params.client = ipa_params->dst_client;
}
/* Get HSUSB / HSIC bam handle */
ret = sps_phy2h(usb_phy_addr, &usb_handle);
if (ret) {
log_event_err("%s: sps_phy2h failed (HSUSB/HSIC BAM) %d\n",
__func__, ret);
return ret;
}
pipe_connect->activity_notify = ipa_params->activity_notify;
pipe_connect->inactivity_notify = ipa_params->inactivity_notify;
pipe_connect->priv = ipa_params->priv;
pipe_connect->reset_pipe_after_lpm = ipa_params->reset_pipe_after_lpm;
/* IPA input parameters */
ipa_in_params.client_bam_hdl = usb_handle;
ipa_in_params.desc_fifo_sz = pipe_connect->desc_fifo_size;
ipa_in_params.data_fifo_sz = pipe_connect->data_fifo_size;
ipa_in_params.notify = ipa_params->notify;
ipa_in_params.priv = ipa_params->priv;
ipa_in_params.skip_ep_cfg = ipa_params->skip_ep_cfg;
ipa_in_params.keep_ipa_awake = ipa_params->keep_ipa_awake;
ret = usb_bam_alloc_buffer(pipe_connect);
if (ret) {
log_event_err("%s(): Error(%d) allocating buffer\n",
__func__, ret);
return ret;
}
ipa_in_params.desc = pipe_connect->desc_mem_buf;
ipa_in_params.data = pipe_connect->data_mem_buf;
memcpy(&ipa_in_params.ipa_ep_cfg, &ipa_params->ipa_ep_cfg,
sizeof(struct ipa_ep_cfg));
ret = ipa_connect(&ipa_in_params, &sps_out_params, &clnt_hdl);
if (ret) {
log_event_err("%s: ipa_connect failed\n", __func__);
return ret;
}
pipe_connect->ipa_clnt_hdl = clnt_hdl;
*pipe = sps_alloc_endpoint();
if (*pipe == NULL) {
log_event_err("%s: sps_alloc_endpoint failed\n", __func__);
ret = -ENOMEM;
goto disconnect_ipa;
}
ret = sps_get_config(*pipe, sps_connection);
if (ret) {
log_event_err("%s: tx get config failed %d\n", __func__ , ret);
goto free_sps_endpoints;
}
if (dir == USB_TO_PEER_PERIPHERAL) {
/* USB src IPA dest */
sps_connection->mode = SPS_MODE_SRC;
ipa_params->cons_clnt_hdl = clnt_hdl;
sps_connection->source = usb_handle;
sps_connection->destination = sps_out_params.ipa_bam_hdl;
sps_connection->src_pipe_index = pipe_connect->src_pipe_index;
sps_connection->dest_pipe_index = sps_out_params.ipa_ep_idx;
ipa_params->ipa_cons_ep_idx = sps_out_params.ipa_ep_idx;
*(ipa_params->src_pipe) = sps_connection->src_pipe_index;
pipe_connect->dst_pipe_index = sps_out_params.ipa_ep_idx;
log_event_dbg("%s: BAM pipe usb[%x]->ipa[%x] connection\n",
__func__,
pipe_connect->src_pipe_index,
pipe_connect->dst_pipe_index);
sps_connection->options = SPS_O_NO_DISABLE;
} else {
/* IPA src, USB dest */
sps_connection->mode = SPS_MODE_DEST;
ipa_params->prod_clnt_hdl = clnt_hdl;
sps_connection->source = sps_out_params.ipa_bam_hdl;
sps_connection->destination = usb_handle;
sps_connection->src_pipe_index = sps_out_params.ipa_ep_idx;
ipa_params->ipa_prod_ep_idx = sps_out_params.ipa_ep_idx;
sps_connection->dest_pipe_index = pipe_connect->dst_pipe_index;
*(ipa_params->dst_pipe) = sps_connection->dest_pipe_index;
pipe_connect->src_pipe_index = sps_out_params.ipa_ep_idx;
log_event_dbg("%s: BAM pipe ipa[%x]->usb[%x] connection\n",
__func__,
pipe_connect->src_pipe_index,
pipe_connect->dst_pipe_index);
sps_connection->options = 0;
}
sps_connection->data = *data_buf;
sps_connection->desc = *desc_buf;
sps_connection->event_thresh = 16;
sps_connection->options |= SPS_O_AUTO_ENABLE;
ret = sps_connect(*pipe, sps_connection);
if (ret < 0) {
log_event_err("%s: sps_connect failed %d\n", __func__, ret);
goto error;
}
return 0;
error:
sps_disconnect(*pipe);
free_sps_endpoints:
sps_free_endpoint(*pipe);
disconnect_ipa:
ipa_disconnect(clnt_hdl);
return ret;
}
static int disconnect_pipe(enum usb_ctrl cur_bam, u8 idx)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
struct usb_bam_pipe_connect *pipe_connect =
&ctx->usb_bam_connections[idx];
struct sps_pipe *pipe = ctx->usb_bam_sps.sps_pipes[idx];
struct sps_connect *sps_connection =
&ctx->usb_bam_sps.sps_connections[idx];
sps_disconnect(pipe);
sps_free_endpoint(pipe);
ctx->usb_bam_sps.sps_pipes[idx] = NULL;
pr_debug("%s(): data size:%x desc size:%x\n",
__func__, sps_connection->data.size,
sps_connection->desc.size);
switch (pipe_connect->mem_type) {
case SYSTEM_MEM:
log_event_dbg("%s: Freeing system memory used by PIPE\n",
__func__);
if (sps_connection->data.phys_base) {
if (cur_bam == CI_CTRL)
dma_free_coherent(&ctx->usb_bam_pdev->dev,
(sps_connection->data.size +
DATA_FIFO_EXTRA_MEM_ALLOC_SIZE),
sps_connection->data.base,
sps_connection->data.phys_base);
else
dma_free_coherent(&ctx->usb_bam_pdev->dev,
sps_connection->data.size,
sps_connection->data.base,
sps_connection->data.phys_base);
}
if (sps_connection->desc.phys_base)
dma_free_coherent(&ctx->usb_bam_pdev->dev,
sps_connection->desc.size,
sps_connection->desc.base,
sps_connection->desc.phys_base);
break;
case OCI_MEM:
log_event_dbg("Freeing oci memory used by BAM PIPE\n");
iounmap(sps_connection->data.base);
iounmap(sps_connection->desc.base);
break;
case SPS_PIPE_MEM:
log_event_dbg("%s: nothing to be be\n", __func__);
break;
}
sps_connection->options &= ~SPS_O_AUTO_ENABLE;
return 0;
}
static bool _hsic_host_bam_resume_core(void)
{
log_event_dbg("%s: enter\n", __func__);
/* Exit from "full suspend" in case of hsic host */
if (host_info[HSIC_CTRL].dev && info[HSIC_CTRL].in_lpm) {
log_event_dbg("%s: Getting hsic device %p\n", __func__,
host_info[HSIC_CTRL].dev);
pm_runtime_get(host_info[HSIC_CTRL].dev);
info[HSIC_CTRL].in_lpm = false;
return true;
}
return false;
}
static void _hsic_host_bam_suspend_core(void)
{
log_event_dbg("%s: enter\n", __func__);
if (host_info[HSIC_CTRL].dev && !info[HSIC_CTRL].in_lpm) {
log_event_dbg("%s: Putting hsic host device %p\n", __func__,
host_info[HSIC_CTRL].dev);
pm_runtime_put(host_info[HSIC_CTRL].dev);
info[HSIC_CTRL].in_lpm = true;
}
}
static void usb_bam_suspend_core(enum usb_ctrl bam_type,
enum usb_bam_mode bam_mode,
bool disconnect)
{
log_event_dbg("%s: enter bam=%s\n", __func__,
bam_enable_strings[bam_type]);
if ((bam_mode == USB_BAM_DEVICE) || (bam_type != HSIC_CTRL)) {
log_event_err("%s: Invalid BAM type %d\n", __func__, bam_type);
return;
}
_hsic_host_bam_suspend_core();
return;
}
static bool usb_bam_resume_core(enum usb_ctrl bam_type,
enum usb_bam_mode bam_mode)
{
log_event_dbg("%s: enter bam=%s\n", __func__,
bam_enable_strings[bam_type]);
if ((bam_mode == USB_BAM_DEVICE) || (bam_type != HSIC_CTRL)) {
log_event_err("%s: Invalid BAM type %d\n", __func__, bam_type);
return false;
}
return _hsic_host_bam_resume_core();
}
/**
* usb_bam_disconnect_ipa_prod() - disconnects the USB consumer i.e. IPA producer.
* @ipa_params: USB IPA related parameters
* @cur_bam: USB controller used for BAM functionality
*
* It performs disconnect with IPA driver for IPA producer pipe and
* with SPS driver for USB BAM consumer pipe. This API also takes care
* of SYS2BAM and BAM2BAM IPA disconnect functionality.
*
* Return: 0 in case of success, errno otherwise.
*/
static int usb_bam_disconnect_ipa_prod(
struct usb_bam_connect_ipa_params *ipa_params,
enum usb_ctrl cur_bam)
{
int ret;
u8 idx = 0;
struct usb_bam_pipe_connect *pipe_connect;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
idx = ipa_params->dst_idx;
pipe_connect = &ctx->usb_bam_connections[idx];
pipe_connect->activity_notify = NULL;
pipe_connect->inactivity_notify = NULL;
pipe_connect->priv = NULL;
/* close IPA -> USB pipe */
if (pipe_connect->pipe_type == USB_BAM_PIPE_BAM2BAM) {
ret = ipa_disconnect(ipa_params->prod_clnt_hdl);
if (ret) {
log_event_err("%s: dst pipe disconnection failure\n",
__func__);
return ret;
}
ret = usb_bam_disconnect_pipe(cur_bam, idx);
if (ret) {
log_event_err("%s: failure to disconnect pipe %d\n",
__func__, idx);
return ret;
}
} else {
ret = ipa_teardown_sys_pipe(ipa_params->prod_clnt_hdl);
if (ret) {
log_event_err("%s: dst pipe disconnection failure\n",
__func__);
return ret;
}
pipe_connect->enabled = false;
spin_lock(&ctx->usb_bam_lock);
if (ctx->pipes_enabled_per_bam == 0)
log_event_err("%s: wrong pipes enabled counter for bam=%d\n",
__func__, pipe_connect->bam_type);
else
ctx->pipes_enabled_per_bam -= 1;
spin_unlock(&ctx->usb_bam_lock);
}
return 0;
}
/**
* usb_bam_disconnect_ipa_cons() - disconnects the USB producer i.e. IPA consumer.
* @ipa_params: USB IPA related parameters
* @cur_bam: USB controller used for BAM functionality
*
* It performs disconnect with IPA driver for IPA consumer pipe and
* with SPS driver for USB BAM producer pipe. This API also takes care
* of SYS2BAM and BAM2BAM IPA disconnect functionality.
*
* Return: 0 in case of success, errno otherwise.
*/
static int usb_bam_disconnect_ipa_cons(
struct usb_bam_connect_ipa_params *ipa_params,
enum usb_ctrl cur_bam)
{
int ret;
u8 idx = 0;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
struct usb_bam_pipe_connect *pipe_connect;
struct sps_pipe *pipe;
u32 timeout = 10, pipe_empty;
struct usb_bam_sps_type usb_bam_sps = ctx->usb_bam_sps;
struct sps_connect *sps_connection;
bool inject_zlt = true;
idx = ipa_params->src_idx;
pipe = ctx->usb_bam_sps.sps_pipes[idx];
pipe_connect = &ctx->usb_bam_connections[idx];
sps_connection = &usb_bam_sps.sps_connections[idx];
pipe_connect->activity_notify = NULL;
pipe_connect->inactivity_notify = NULL;
pipe_connect->priv = NULL;
/*
* On some platforms, there is a chance that flow control
* is disabled from IPA side, due to this IPA core may not
* consume data from USB. Hence notify IPA to enable flow
* control and then check sps pipe is empty or not before
* processing USB->IPA pipes disconnect.
*/
ipa_clear_endpoint_delay(ipa_params->cons_clnt_hdl);
retry:
/* Make sure pipe is empty before disconnecting it */
while (1) {
ret = sps_is_pipe_empty(pipe, &pipe_empty);
if (ret) {
log_event_err("%s: sps_is_pipe_empty failed with %d\n",
__func__, ret);
return ret;
}
if (pipe_empty || !--timeout)
break;
/* Check again */
usleep_range(1000, 2000);
}
if (!pipe_empty) {
if (inject_zlt) {
pr_debug("%s: Inject ZLT\n", __func__);
log_event_dbg("%s: Inject ZLT\n", __func__);
inject_zlt = false;
sps_pipe_inject_zlt(sps_connection->destination,
sps_connection->dest_pipe_index);
timeout = 10;
goto retry;
}
log_event_err("%s: src pipe(USB) not empty, wait timed out!\n",
__func__);
sps_get_bam_debug_info(ctx->h_bam, 93,
(SPS_BAM_PIPE(0) | SPS_BAM_PIPE(1)), 0, 2);
ipa_bam_reg_dump();
panic("%s:SPS pipe not empty for USB->IPA\n", __func__);
}
/* Do the release handshake with the IPA via RM */
spin_lock(&usb_bam_ipa_handshake_info_lock);
info[cur_bam].connect_complete = 0;
info[cur_bam].disconnected = 1;
spin_unlock(&usb_bam_ipa_handshake_info_lock);
/* Start release handshake on the last USB BAM producer pipe */
if (info[cur_bam].prod_pipes_enabled_per_bam == 1)
wait_for_prod_release(cur_bam);
/* close USB -> IPA pipe */
if (pipe_connect->pipe_type == USB_BAM_PIPE_BAM2BAM) {
ret = ipa_disconnect(ipa_params->cons_clnt_hdl);
if (ret) {
log_event_err("%s: src pipe disconnection failure\n",
__func__);
return ret;
}
ret = usb_bam_disconnect_pipe(cur_bam, idx);
if (ret) {
log_event_err("%s: failure to disconnect pipe %d\n",
__func__, idx);
return ret;
}
} else {
ret = ipa_teardown_sys_pipe(ipa_params->cons_clnt_hdl);
if (ret) {
log_event_err("%s: src pipe disconnection failure\n",
__func__);
return ret;
}
pipe_connect->enabled = false;
spin_lock(&ctx->usb_bam_lock);
if (ctx->pipes_enabled_per_bam == 0)
log_event_err("%s: wrong pipes enabled counter for bam=%d\n",
__func__, pipe_connect->bam_type);
else
ctx->pipes_enabled_per_bam -= 1;
spin_unlock(&ctx->usb_bam_lock);
}
pipe_connect->ipa_clnt_hdl = -1;
info[cur_bam].prod_pipes_enabled_per_bam -= 1;
return 0;
}
int usb_bam_connect(enum usb_ctrl cur_bam, int idx, u32 *bam_pipe_idx)
{
int ret;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
struct usb_bam_pipe_connect *pipe_connect =
&ctx->usb_bam_connections[idx];
struct device *bam_dev = &ctx->usb_bam_pdev->dev;
struct msm_usb_bam_platform_data *pdata = bam_dev->platform_data;
enum usb_bam_mode cur_mode;
if (pipe_connect->enabled) {
pr_warning("%s: connection %d was already established\n"
, __func__, idx);
return 0;
}
if (!bam_pipe_idx) {
log_event_err("%s: invalid bam_pipe_idx\n", __func__);
return -EINVAL;
}
if (idx < 0 || idx > ctx->max_connections) {
log_event_err("idx is wrong %d\n", idx);
return -EINVAL;
}
cur_mode = pipe_connect->bam_mode;
log_event_dbg("%s: PM Runtime GET %d, count: %d\n",
__func__, idx, get_pm_runtime_counter(bam_dev));
pm_runtime_get_sync(bam_dev);
spin_lock(&ctx->usb_bam_lock);
/* Check if BAM requires RESET before connect and reset of first pipe */
if ((pdata->reset_on_connect == true) &&
(ctx->pipes_enabled_per_bam == 0)) {
spin_unlock(&ctx->usb_bam_lock);
if (cur_bam == CI_CTRL)
msm_hw_bam_disable(1);
sps_device_reset(ctx->h_bam);
if (cur_bam == CI_CTRL)
msm_hw_bam_disable(0);
spin_lock(&ctx->usb_bam_lock);
}
spin_unlock(&ctx->usb_bam_lock);
/* Set the BAM mode (host/device) according to connected pipe */
info[cur_bam].cur_bam_mode = pipe_connect->bam_mode;
ret = connect_pipe(cur_bam, idx, bam_pipe_idx);
if (ret) {
log_event_err("%s: pipe connection[%d] failure\n",
__func__, idx);
log_event_dbg("%s: err, PM RT PUT %d, count: %d\n",
__func__, idx, get_pm_runtime_counter(bam_dev));
pm_runtime_put_sync(bam_dev);
return ret;
}
log_event_dbg("%s: pipe connection[%d] success\n", __func__, idx);
pipe_connect->enabled = 1;
spin_lock(&ctx->usb_bam_lock);
ctx->pipes_enabled_per_bam += 1;
spin_unlock(&ctx->usb_bam_lock);
return 0;
}
static int __sps_reset_pipe(enum usb_ctrl bam_type,
struct sps_pipe *pipe, u32 idx)
{
int ret;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
struct sps_connect *sps_connection =
&ctx->usb_bam_sps.sps_connections[idx];
ret = sps_disconnect(pipe);
if (ret) {
log_event_err("%s: sps_disconnect() failed %d\n",
__func__, ret);
return ret;
}
ret = sps_connect(pipe, sps_connection);
if (ret < 0) {
log_event_err("%s: sps_connect() failed %d\n", __func__, ret);
return ret;
}
return 0;
}
static void reset_pipe_for_resume(struct usb_bam_pipe_connect *pipe_connect)
{
int ret;
enum usb_ctrl bam_type = pipe_connect->bam_type;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
u32 idx = ARRAY_INDEX_FROM_ADDR(ctx->usb_bam_connections, pipe_connect);
struct sps_pipe *pipe = ctx->usb_bam_sps.sps_pipes[idx];
if (!pipe_connect->reset_pipe_after_lpm ||
pipe_connect->pipe_type != USB_BAM_PIPE_BAM2BAM) {
log_event_dbg("No need to reset pipe %d\n", idx);
return;
}
ret = __sps_reset_pipe(bam_type, pipe, idx);
if (ret) {
log_event_err("%s failed to reset the USB sps pipe\n",
__func__);
return;
}
ret = ipa_reset_endpoint(pipe_connect->ipa_clnt_hdl);
if (ret) {
log_event_err("%s failed to reset the IPA pipe\n", __func__);
return;
}
log_event_dbg("%s: USB/IPA pipes reset after resume\n", __func__);
}
/* Stop PROD transfers in case they were started */
static void stop_prod_transfers(struct usb_bam_pipe_connect *pipe_connect)
{
if (pipe_connect->stop && !pipe_connect->prod_stopped) {
log_event_dbg("%s: Stop PROD transfers on\n", __func__);
pipe_connect->stop(pipe_connect->start_stop_param,
USB_TO_PEER_PERIPHERAL);
pipe_connect->prod_stopped = true;
}
}
static void start_prod_transfers(struct usb_bam_pipe_connect *pipe_connect)
{
log_event_err("%s: Starting PROD\n", __func__);
if (pipe_connect->start && pipe_connect->prod_stopped) {
log_event_dbg("%s: Enqueue PROD transfer\n", __func__);
pipe_connect->start(pipe_connect->start_stop_param,
USB_TO_PEER_PERIPHERAL);
pipe_connect->prod_stopped = false;
}
}
static void start_cons_transfers(struct usb_bam_pipe_connect *pipe_connect)
{
/* Start CONS transfer */
if (pipe_connect->start && pipe_connect->cons_stopped) {
log_event_dbg("%s: Enqueue CONS transfer\n", __func__);
pipe_connect->start(pipe_connect->start_stop_param,
PEER_PERIPHERAL_TO_USB);
pipe_connect->cons_stopped = 0;
}
}
/* Stop CONS transfers in case they were started */
static void stop_cons_transfers(struct usb_bam_pipe_connect *pipe_connect)
{
if (pipe_connect->stop && !pipe_connect->cons_stopped) {
log_event_dbg("%s: Stop CONS transfers\n", __func__);
pipe_connect->stop(pipe_connect->start_stop_param,
PEER_PERIPHERAL_TO_USB);
pipe_connect->cons_stopped = 1;
}
}
static void resume_suspended_pipes(enum usb_ctrl cur_bam)
{
u32 idx, dst_idx;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
struct usb_bam_pipe_connect *pipe_connect;
log_event_dbg("Resuming: suspend pipes =%d\n",
info[cur_bam].pipes_suspended);
while (info[cur_bam].pipes_suspended >= 1) {
idx = info[cur_bam].pipes_suspended - 1;
dst_idx = info[cur_bam].resume_dst_idx[idx];
pipe_connect = &ctx->usb_bam_connections[dst_idx];
if (pipe_connect->cons_stopped) {
log_event_dbg("%s: Starting CONS on %d\n", __func__,
dst_idx);
start_cons_transfers(pipe_connect);
}
log_event_dbg("%s: Starting PROD on %d\n", __func__, dst_idx);
start_prod_transfers(pipe_connect);
info[cur_bam].pipes_suspended--;
info[cur_bam].pipes_resumed++;
/* Suspend was aborted, renew pm_runtime vote */
log_event_dbg("%s: PM Runtime GET %d, count: %d\n", __func__,
idx, get_pm_runtime_counter(&ctx->usb_bam_pdev->dev));
pm_runtime_get(&ctx->usb_bam_pdev->dev);
}
}
static inline int all_pipes_suspended(enum usb_ctrl cur_bam)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
log_event_dbg("%s: pipes_suspended=%d pipes_enabled_per_bam=%d\n",
__func__, info[cur_bam].pipes_suspended,
ctx->pipes_enabled_per_bam);
return info[cur_bam].pipes_suspended == ctx->pipes_enabled_per_bam;
}
static void usb_bam_finish_suspend(enum usb_ctrl cur_bam)
{
int ret, bam2bam;
u32 cons_empty, idx, dst_idx;
struct sps_pipe *cons_pipe;
struct usb_bam_pipe_connect *pipe_connect;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
struct device *bam_dev = &ctx->usb_bam_pdev->dev;
mutex_lock(&info[cur_bam].suspend_resume_mutex);
spin_lock(&usb_bam_ipa_handshake_info_lock);
/* If cable was disconnected, let disconnection seq do everything */
if (info[cur_bam].disconnected || all_pipes_suspended(cur_bam)) {
spin_unlock(&usb_bam_ipa_handshake_info_lock);
mutex_unlock(&info[cur_bam].suspend_resume_mutex);
log_event_dbg("%s: Cable disconnected\n", __func__);
return;
}
log_event_dbg("%s: bam:%s RT GET: %d\n", __func__,
bam_enable_strings[cur_bam], get_pm_runtime_counter(bam_dev));
pm_runtime_get(bam_dev);
/* If resume was called don't finish this work */
if (!info[cur_bam].bus_suspend) {
spin_unlock(&usb_bam_ipa_handshake_info_lock);
log_event_dbg("%s: Bus resume in progress\n", __func__);
goto no_lpm;
}
/* Go over all pipes, stop and suspend them, and go to lpm */
while (!all_pipes_suspended(cur_bam)) {
idx = info[cur_bam].pipes_suspended;
dst_idx = info[cur_bam].suspend_dst_idx[idx];
cons_pipe = ctx->usb_bam_sps.sps_pipes[dst_idx];
pipe_connect = &ctx->usb_bam_connections[dst_idx];
log_event_dbg("pipes_suspended=%d pipes_to_suspend=%d\n",
info[cur_bam].pipes_suspended,
info[cur_bam].pipes_to_suspend);
bam2bam = (pipe_connect->pipe_type == USB_BAM_PIPE_BAM2BAM);
spin_unlock(&usb_bam_ipa_handshake_info_lock);
if (bam2bam) {
ret = sps_is_pipe_empty(cons_pipe, &cons_empty);
if (ret) {
log_event_err("%s: sps_is_pipe_empty failed with %d\n",
__func__, ret);
goto no_lpm;
}
}
spin_lock(&usb_bam_ipa_handshake_info_lock);
/* Stop CONS transfers and go to lpm if no more data in the */
/* pipes */
if (cons_empty) {
log_event_dbg("%s: Stopping CONS transfers on dst_idx=%d\n"
, __func__, dst_idx);
stop_cons_transfers(pipe_connect);
spin_unlock(&usb_bam_ipa_handshake_info_lock);
log_event_dbg("%s: Suspending pipe\n", __func__);
spin_lock(&usb_bam_ipa_handshake_info_lock);
info[cur_bam].resume_src_idx[idx] =
info[cur_bam].suspend_src_idx[idx];
info[cur_bam].resume_dst_idx[idx] =
info[cur_bam].suspend_dst_idx[idx];
info[cur_bam].pipes_suspended++;
log_event_dbg("%s: PM Runtime PUT %d, count: %d\n",
__func__, idx, get_pm_runtime_counter(bam_dev));
pm_runtime_put(&ctx->usb_bam_pdev->dev);
} else {
log_event_dbg("%s: Pipe is not empty, not going to LPM\n",
__func__);
spin_unlock(&usb_bam_ipa_handshake_info_lock);
goto no_lpm;
}
}
info[cur_bam].pipes_to_suspend = 0;
info[cur_bam].pipes_resumed = 0;
spin_unlock(&usb_bam_ipa_handshake_info_lock);
/* ACK on the last pipe */
if (info[cur_bam].pipes_suspended == ctx->pipes_enabled_per_bam &&
info[cur_bam].cur_cons_state == IPA_RM_RESOURCE_RELEASED) {
ipa_rm_notify_completion(
IPA_RM_RESOURCE_RELEASED,
ipa_rm_resource_cons[cur_bam]);
}
log_event_dbg("%s: Starting LPM on Bus Suspend, RT PUT:%d\n", __func__,
get_pm_runtime_counter(bam_dev));
/* Put to match _get at the beginning of this routine */
pm_runtime_put_sync(bam_dev);
mutex_unlock(&info[cur_bam].suspend_resume_mutex);
return;
no_lpm:
spin_lock(&usb_bam_ipa_handshake_info_lock);
resume_suspended_pipes(cur_bam);
info[cur_bam].pipes_resumed = 0;
info[cur_bam].pipes_to_suspend = 0;
info[cur_bam].pipes_suspended = 0;
spin_unlock(&usb_bam_ipa_handshake_info_lock);
/* Finish the handshake. Resume Sequence will start automatically
by the data in the pipes */
if (info[cur_bam].cur_cons_state == IPA_RM_RESOURCE_RELEASED)
ipa_rm_notify_completion(IPA_RM_RESOURCE_RELEASED,
ipa_rm_resource_cons[cur_bam]);
/* Put to match _get at the beginning of this routine */
pm_runtime_put(bam_dev);
mutex_unlock(&info[cur_bam].suspend_resume_mutex);
}
void usb_bam_finish_suspend_(struct work_struct *w)
{
enum usb_ctrl cur_bam;
struct usb_bam_ipa_handshake_info *info_ptr;
info_ptr = container_of(w, struct usb_bam_ipa_handshake_info,
finish_suspend_work);
cur_bam = info_ptr->cur_bam_mode;
log_event_dbg("%s: Finishing suspend sequence(BAM=%s)\n", __func__,
bam_enable_strings[cur_bam]);
usb_bam_finish_suspend(cur_bam);
}
static void usb_prod_notify_cb(void *user_data, enum ipa_rm_event event,
unsigned long data)
{
enum usb_ctrl *cur_bam = (void *)user_data;
switch (event) {
case IPA_RM_RESOURCE_GRANTED:
log_event_dbg("%s: %s_PROD resource granted\n",
__func__, bam_enable_strings[*cur_bam]);
info[*cur_bam].cur_prod_state = IPA_RM_RESOURCE_GRANTED;
complete_all(&info[*cur_bam].prod_avail);
break;
case IPA_RM_RESOURCE_RELEASED:
log_event_dbg("%s: %s_PROD resource released\n",
__func__, bam_enable_strings[*cur_bam]);
info[*cur_bam].cur_prod_state = IPA_RM_RESOURCE_RELEASED;
complete_all(&info[*cur_bam].prod_released);
break;
default:
break;
}
return;
}
/**
* usb_bam_resume_host: vote for hsic host core resume.
*
* NOTE: This function should be called in a context that hold
* usb_bam_lock.
*/
static void usb_bam_resume_host(enum usb_ctrl bam_type)
{
int i;
struct usb_bam_pipe_connect *pipe_iter;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
log_event_dbg("%s: enter bam=%s\n", __func__,
bam_enable_strings[bam_type]);
if (usb_bam_resume_core(bam_type, USB_BAM_HOST)) {
for (i = 0; i < ctx->max_connections; i++) {
pipe_iter = &ctx->usb_bam_connections[i];
if (pipe_iter->enabled && pipe_iter->suspended)
pipe_iter->suspended = false;
}
}
}
static int cons_request_resource(enum usb_ctrl cur_bam)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
int ret = -EINPROGRESS;
log_event_dbg("%s: Request %s_CONS resource\n",
__func__, bam_enable_strings[cur_bam]);
spin_lock(&ctx->usb_bam_lock);
spin_lock(&usb_bam_ipa_handshake_info_lock);
info[cur_bam].cur_cons_state = IPA_RM_RESOURCE_GRANTED;
switch (info[cur_bam].cur_bam_mode) {
case USB_BAM_DEVICE:
if (ctx->pipes_enabled_per_bam &&
info[cur_bam].connect_complete) {
if (!all_pipes_suspended(cur_bam) &&
!info[cur_bam].bus_suspend) {
log_event_dbg("%s: ACK on cons_request\n",
__func__);
ret = 0;
} else if (info[cur_bam].bus_suspend) {
info[cur_bam].bus_suspend = 0;
log_event_dbg("%s: Wake up host\n", __func__);
if (info[cur_bam].wake_cb)
info[cur_bam].wake_cb(
info[cur_bam].wake_param);
}
}
break;
case USB_BAM_HOST:
/*
* Vote for hsic resume, however the core
* resume may not be completed yet or on the other hand
* hsic core might already be resumed, due to a vote
* by other driver, in this case we will just renew our
* vote here.
*/
usb_bam_resume_host(cur_bam);
/*
* Return sucess if there are pipes connected
* and hsic core is actually not in lpm.
* If in lpm, grant will occur on resume
* finish (see msm_bam_hsic_notify_on_resume)
*/
if (ctx->pipes_enabled_per_bam && !host_info[cur_bam].in_lpm)
ret = 0;
break;
default:
break;
}
spin_unlock(&usb_bam_ipa_handshake_info_lock);
spin_unlock(&ctx->usb_bam_lock);
if (ret == -EINPROGRESS)
log_event_dbg("%s: EINPROGRESS on cons_request\n", __func__);
return ret;
}
static int ss_usb_cons_request_resource(void)
{
return cons_request_resource(DWC3_CTRL);
}
static int usb_cons_request_resource(void)
{
return cons_request_resource(CI_CTRL);
}
static int hsic_cons_request_resource(void)
{
return cons_request_resource(HSIC_CTRL);
}
static int cons_release_resource(enum usb_ctrl cur_bam)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
log_event_dbg("%s: Release %s_CONS resource\n",
__func__, bam_enable_strings[cur_bam]);
info[cur_bam].cur_cons_state = IPA_RM_RESOURCE_RELEASED;
spin_lock(&ctx->usb_bam_lock);
if (!ctx->pipes_enabled_per_bam) {
spin_unlock(&ctx->usb_bam_lock);
log_event_dbg("%s: ACK on cons_release\n", __func__);
return 0;
}
spin_unlock(&ctx->usb_bam_lock);
if (info[cur_bam].cur_bam_mode == USB_BAM_DEVICE) {
spin_lock(&usb_bam_ipa_handshake_info_lock);
if (info[cur_bam].bus_suspend) {
queue_work(ctx->usb_bam_wq,
&info[cur_bam].finish_suspend_work);
}
spin_unlock(&usb_bam_ipa_handshake_info_lock);
log_event_dbg("%s: EINPROGRESS cons_release\n", __func__);
return -EINPROGRESS;
} else if (info[cur_bam].cur_bam_mode == USB_BAM_HOST) {
/*
* Allow to go to lpm for now. Actual state will be checked
* in msm_bam_hsic_lpm_ok() / msm_bam_lpm_ok() just before
* going to lpm.
*/
usb_bam_suspend_core(cur_bam, info[cur_bam].cur_bam_mode, 1);
}
return 0;
}
static int hsic_cons_release_resource(void)
{
return cons_release_resource(HSIC_CTRL);
}
static int usb_cons_release_resource(void)
{
return cons_release_resource(CI_CTRL);
}
static int ss_usb_cons_release_resource(void)
{
return cons_release_resource(DWC3_CTRL);
}
static void usb_bam_ipa_create_resources(enum usb_ctrl cur_bam)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
struct msm_usb_bam_platform_data *pdata =
ctx->usb_bam_pdev->dev.platform_data;
struct ipa_rm_create_params usb_prod_create_params;
struct ipa_rm_create_params usb_cons_create_params;
int ret;
/* Create USB/HSIC_PROD entity */
memset(&usb_prod_create_params, 0, sizeof(usb_prod_create_params));
usb_prod_create_params.name = ipa_rm_resource_prod[cur_bam];
usb_prod_create_params.reg_params.notify_cb = usb_prod_notify_cb;
usb_prod_create_params.reg_params.user_data = &pdata->bam_type;
usb_prod_create_params.floor_voltage = IPA_VOLTAGE_SVS;
ret = ipa_rm_create_resource(&usb_prod_create_params);
if (ret) {
log_event_err("%s: Failed to create USB_PROD resource\n",
__func__);
return;
}
/* Create USB_CONS entity */
memset(&usb_cons_create_params, 0, sizeof(usb_cons_create_params));
usb_cons_create_params.name = ipa_rm_resource_cons[cur_bam];
usb_cons_create_params.request_resource = request_resource_cb[cur_bam];
usb_cons_create_params.release_resource = release_resource_cb[cur_bam];
usb_cons_create_params.floor_voltage = IPA_VOLTAGE_SVS;
ret = ipa_rm_create_resource(&usb_cons_create_params);
if (ret) {
log_event_err("%s: Failed to create USB_CONS resource\n",
__func__);
return;
}
}
static void wait_for_prod_granted(enum usb_ctrl cur_bam)
{
int ret;
log_event_dbg("%s Request %s_PROD_RES\n", __func__,
bam_enable_strings[cur_bam]);
if (info[cur_bam].cur_cons_state == IPA_RM_RESOURCE_GRANTED)
log_event_dbg("%s: CONS already granted for some reason\n",
__func__);
if (info[cur_bam].cur_prod_state == IPA_RM_RESOURCE_GRANTED)
log_event_dbg("%s: PROD already granted for some reason\n",
__func__);
init_completion(&info[cur_bam].prod_avail);
ret = ipa_rm_request_resource(ipa_rm_resource_prod[cur_bam]);
if (!ret) {
info[cur_bam].cur_prod_state = IPA_RM_RESOURCE_GRANTED;
complete_all(&info[cur_bam].prod_avail);
log_event_dbg("%s: PROD_GRANTED without wait\n", __func__);
} else if (ret == -EINPROGRESS) {
log_event_dbg("%s: Waiting for PROD_GRANTED\n", __func__);
if (!wait_for_completion_timeout(&info[cur_bam].prod_avail,
USB_BAM_TIMEOUT))
log_event_err("%s: Timeout wainting for PROD_GRANTED\n",
__func__);
} else
log_event_err("%s: ipa_rm_request_resource ret =%d\n",
__func__, ret);
}
void notify_usb_connected(enum usb_ctrl cur_bam)
{
log_event_dbg("%s: enter\n", __func__);
spin_lock(&usb_bam_ipa_handshake_info_lock);
if (info[cur_bam].cur_bam_mode == USB_BAM_DEVICE)
info[cur_bam].connect_complete = 1;
spin_unlock(&usb_bam_ipa_handshake_info_lock);
if (info[cur_bam].cur_cons_state == IPA_RM_RESOURCE_GRANTED) {
log_event_dbg("%s: Notify %s CONS_GRANTED\n", __func__,
bam_enable_strings[cur_bam]);
ipa_rm_notify_completion(IPA_RM_RESOURCE_GRANTED,
ipa_rm_resource_cons[cur_bam]);
}
}
static void wait_for_prod_release(enum usb_ctrl cur_bam)
{
int ret;
if (info[cur_bam].cur_cons_state == IPA_RM_RESOURCE_RELEASED)
log_event_dbg("%s consumer already released\n", __func__);
if (info[cur_bam].cur_prod_state == IPA_RM_RESOURCE_RELEASED)
log_event_dbg("%s producer already released\n", __func__);
init_completion(&info[cur_bam].prod_released);
log_event_dbg("%s: Releasing %s_PROD\n", __func__,
bam_enable_strings[cur_bam]);
ret = ipa_rm_release_resource(ipa_rm_resource_prod[cur_bam]);
if (!ret) {
log_event_dbg("%s: Released without waiting\n", __func__);
info[cur_bam].cur_prod_state = IPA_RM_RESOURCE_RELEASED;
complete_all(&info[cur_bam].prod_released);
} else if (ret == -EINPROGRESS) {
log_event_dbg("%s: Waiting for PROD_RELEASED\n", __func__);
if (!wait_for_completion_timeout(&info[cur_bam].prod_released,
USB_BAM_TIMEOUT))
log_event_err("%s: Timeout waiting for PROD_RELEASED\n",
__func__);
} else {
log_event_err("%s: ipa_rm_request_resource ret =%d\n",
__func__, ret);
}
}
static bool check_pipes_empty(enum usb_ctrl bam_type, u8 src_idx, u8 dst_idx)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
struct sps_pipe *prod_pipe, *cons_pipe;
struct usb_bam_pipe_connect *prod_pipe_connect, *cons_pipe_connect;
u32 prod_empty, cons_empty;
prod_pipe_connect = &ctx->usb_bam_connections[src_idx];
cons_pipe_connect = &ctx->usb_bam_connections[dst_idx];
if (!prod_pipe_connect->enabled || !cons_pipe_connect->enabled) {
log_event_err("%s: pipes are not enabled dst=%d src=%d\n",
__func__, prod_pipe_connect->enabled,
cons_pipe_connect->enabled);
}
/* If we have any remaints in the pipes we don't go to sleep */
prod_pipe = ctx->usb_bam_sps.sps_pipes[src_idx];
cons_pipe = ctx->usb_bam_sps.sps_pipes[dst_idx];
log_event_dbg("prod_pipe=%p, cons_pipe=%p\n", prod_pipe, cons_pipe);
if (!cons_pipe || (!prod_pipe &&
prod_pipe_connect->pipe_type == USB_BAM_PIPE_BAM2BAM)) {
log_event_err("Missing a pipe!\n");
return false;
}
if (prod_pipe && sps_is_pipe_empty(prod_pipe, &prod_empty)) {
log_event_err("sps_is_pipe_empty(prod) failed\n");
return false;
} else {
prod_empty = true;
}
if (sps_is_pipe_empty(cons_pipe, &cons_empty)) {
log_event_err("sps_is_pipe_empty(cons) failed\n");
return false;
}
if (!prod_empty || !cons_empty) {
log_event_err("pipes not empty prod=%d cond=%d\n",
prod_empty, cons_empty);
return false;
}
return true;
}
void usb_bam_suspend(enum usb_ctrl cur_bam,
struct usb_bam_connect_ipa_params *ipa_params)
{
struct usb_bam_pipe_connect *pipe_connect;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
enum usb_bam_mode bam_mode;
u8 src_idx, dst_idx;
log_event_dbg("%s: enter\n", __func__);
if (!ipa_params) {
log_event_err("%s: Invalid ipa params\n", __func__);
return;
}
src_idx = ipa_params->src_idx;
dst_idx = ipa_params->dst_idx;
if (src_idx >= ctx->max_connections ||
dst_idx >= ctx->max_connections) {
log_event_err("%s: Invalid connection index src=%d dst=%d\n",
__func__, src_idx, dst_idx);
}
pipe_connect = &ctx->usb_bam_connections[src_idx];
bam_mode = pipe_connect->bam_mode;
if (bam_mode != USB_BAM_DEVICE)
return;
log_event_dbg("%s: Starting suspend sequence(BAM=%s)\n", __func__,
bam_enable_strings[cur_bam]);
spin_lock(&usb_bam_ipa_handshake_info_lock);
info[cur_bam].bus_suspend = 1;
/* If cable was disconnected, let disconnection seq do everything */
if (info[cur_bam].disconnected) {
spin_unlock(&usb_bam_ipa_handshake_info_lock);
log_event_dbg("%s: Cable disconnected\n", __func__);
return;
}
log_event_dbg("%s: Adding src=%d dst=%d in pipes_to_suspend=%d\n",
__func__, src_idx,
dst_idx, info[cur_bam].pipes_to_suspend);
info[cur_bam].suspend_src_idx[info[cur_bam].pipes_to_suspend] = src_idx;
info[cur_bam].suspend_dst_idx[info[cur_bam].pipes_to_suspend] = dst_idx;
info[cur_bam].pipes_to_suspend++;
spin_unlock(&usb_bam_ipa_handshake_info_lock);
usb_bam_start_suspend(&info[cur_bam]);
}
static void usb_bam_start_suspend(struct usb_bam_ipa_handshake_info *info_ptr)
{
struct usb_bam_pipe_connect *pipe_connect;
enum usb_ctrl cur_bam = info_ptr->bam_type;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
u8 src_idx, dst_idx;
int pipes_to_suspend;
cur_bam = info_ptr->bam_type;
log_event_dbg("%s: Starting suspend sequence(BAM=%s)\n", __func__,
bam_enable_strings[cur_bam]);
mutex_lock(&info[cur_bam].suspend_resume_mutex);
spin_lock(&usb_bam_ipa_handshake_info_lock);
/* If cable was disconnected, let disconnection seq do everything */
if (info[cur_bam].disconnected) {
spin_unlock(&usb_bam_ipa_handshake_info_lock);
mutex_unlock(&info[cur_bam].suspend_resume_mutex);
log_event_dbg("%s: Cable disconnected\n", __func__);
return;
}
pipes_to_suspend = info[cur_bam].pipes_to_suspend;
if (!info[cur_bam].bus_suspend || !pipes_to_suspend) {
spin_unlock(&usb_bam_ipa_handshake_info_lock);
log_event_dbg("%s: Resume started, not suspending\n", __func__);
mutex_unlock(&info[cur_bam].suspend_resume_mutex);
return;
}
src_idx = info[cur_bam].suspend_src_idx[pipes_to_suspend - 1];
dst_idx = info[cur_bam].suspend_dst_idx[pipes_to_suspend - 1];
pipe_connect = &ctx->usb_bam_connections[dst_idx];
stop_prod_transfers(pipe_connect);
spin_unlock(&usb_bam_ipa_handshake_info_lock);
/* Don't start LPM seq if data in the pipes */
if (!check_pipes_empty(cur_bam, src_idx, dst_idx)) {
start_prod_transfers(pipe_connect);
info[cur_bam].pipes_to_suspend = 0;
info[cur_bam].bus_suspend = 0;
mutex_unlock(&info[cur_bam].suspend_resume_mutex);
return;
}
spin_lock(&usb_bam_ipa_handshake_info_lock);
/* Start release handshake on the last pipe */
if (info[cur_bam].pipes_to_suspend * 2 == ctx->pipes_enabled_per_bam) {
spin_unlock(&usb_bam_ipa_handshake_info_lock);
wait_for_prod_release(cur_bam);
} else {
spin_unlock(&usb_bam_ipa_handshake_info_lock);
}
mutex_unlock(&info[cur_bam].suspend_resume_mutex);
if (info[cur_bam].cur_cons_state == IPA_RM_RESOURCE_RELEASED)
usb_bam_finish_suspend(cur_bam);
else
log_event_dbg("Consumer not released yet\n");
}
static void usb_bam_finish_resume(struct work_struct *w)
{
/* TODO: Change this when HSIC device support is introduced */
enum usb_ctrl cur_bam;
struct usb_bam_ipa_handshake_info *info_ptr;
struct usb_bam_pipe_connect *pipe_connect;
struct usb_bam_ctx_type *ctx;
struct device *bam_dev;
u32 idx, dst_idx, suspended;
info_ptr = container_of(w, struct usb_bam_ipa_handshake_info,
resume_work);
cur_bam = info_ptr->bam_type;
ctx = &msm_usb_bam[cur_bam];
bam_dev = &ctx->usb_bam_pdev->dev;
log_event_dbg("%s: enter bam=%s, RT GET: %d\n", __func__,
bam_enable_strings[cur_bam], get_pm_runtime_counter(bam_dev));
pm_runtime_get_sync(bam_dev);
mutex_lock(&info[cur_bam].suspend_resume_mutex);
/* Suspend or disconnect happened in the meantime */
spin_lock(&usb_bam_ipa_handshake_info_lock);
if (info[cur_bam].bus_suspend || info[cur_bam].disconnected) {
spin_unlock(&usb_bam_ipa_handshake_info_lock);
log_event_dbg("%s: Bus suspended, not resuming, RT PUT: %d\n",
__func__, get_pm_runtime_counter(bam_dev));
mutex_unlock(&info[cur_bam].suspend_resume_mutex);
pm_runtime_put_sync(bam_dev);
return;
}
info[cur_bam].pipes_to_suspend = 0;
log_event_dbg("Resuming: pipes_suspended =%d\n",
info[cur_bam].pipes_suspended);
suspended = info[cur_bam].pipes_suspended;
while (suspended >= 1) {
idx = suspended - 1;
dst_idx = info[cur_bam].resume_dst_idx[idx];
pipe_connect = &ctx->usb_bam_connections[dst_idx];
spin_unlock(&usb_bam_ipa_handshake_info_lock);
reset_pipe_for_resume(pipe_connect);
spin_lock(&usb_bam_ipa_handshake_info_lock);
if (pipe_connect->cons_stopped) {
log_event_dbg("%s: Starting CONS on %d\n", __func__,
dst_idx);
start_cons_transfers(pipe_connect);
}
suspended--;
}
if (info[cur_bam].cur_cons_state == IPA_RM_RESOURCE_GRANTED) {
log_event_dbg("%s: Notify CONS_GRANTED\n", __func__);
ipa_rm_notify_completion(IPA_RM_RESOURCE_GRANTED,
ipa_rm_resource_cons[cur_bam]);
}
spin_unlock(&usb_bam_ipa_handshake_info_lock);
/* Start handshake for the first pipe resumed */
if (info[cur_bam].pipes_resumed == 0)
wait_for_prod_granted(cur_bam);
spin_lock(&usb_bam_ipa_handshake_info_lock);
while (info[cur_bam].pipes_suspended >= 1) {
idx = info[cur_bam].pipes_suspended - 1;
dst_idx = info[cur_bam].resume_dst_idx[idx];
pipe_connect = &ctx->usb_bam_connections[dst_idx];
log_event_dbg("%s: Starting PROD on %d\n", __func__, dst_idx);
start_prod_transfers(pipe_connect);
info[cur_bam].pipes_suspended--;
info[cur_bam].pipes_resumed++;
log_event_dbg("%s: PM Runtime GET %d, count: %d\n",
__func__, idx, get_pm_runtime_counter(bam_dev));
pm_runtime_get(&ctx->usb_bam_pdev->dev);
}
if (info[cur_bam].pipes_resumed == ctx->pipes_enabled_per_bam) {
info[cur_bam].pipes_resumed = 0;
if (info[cur_bam].cur_cons_state == IPA_RM_RESOURCE_GRANTED) {
log_event_dbg("%s: Notify CONS_GRANTED\n", __func__);
ipa_rm_notify_completion(IPA_RM_RESOURCE_GRANTED,
ipa_rm_resource_cons[cur_bam]);
}
}
spin_unlock(&usb_bam_ipa_handshake_info_lock);
mutex_unlock(&info[cur_bam].suspend_resume_mutex);
log_event_dbg("%s: done..PM Runtime PUT %d, count: %d\n",
__func__, idx, get_pm_runtime_counter(bam_dev));
/* Put to match _get at the beginning of this routine */
pm_runtime_put(&ctx->usb_bam_pdev->dev);
}
void usb_bam_resume(enum usb_ctrl cur_bam,
struct usb_bam_connect_ipa_params *ipa_params)
{
u8 src_idx, dst_idx;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
struct usb_bam_pipe_connect *pipe_connect;
log_event_dbg("%s: Resuming\n", __func__);
if (!ipa_params) {
log_event_err("%s: Invalid ipa params\n", __func__);
return;
}
src_idx = ipa_params->src_idx;
dst_idx = ipa_params->dst_idx;
if (src_idx >= ctx->max_connections ||
dst_idx >= ctx->max_connections) {
log_event_err("%s: Invalid connection index src=%d dst=%d\n",
__func__, src_idx, dst_idx);
return;
}
pipe_connect = &ctx->usb_bam_connections[src_idx];
log_event_dbg("%s: bam=%s mode =%d\n", __func__,
bam_enable_strings[cur_bam], pipe_connect->bam_mode);
if (pipe_connect->bam_mode != USB_BAM_DEVICE)
return;
info[cur_bam].in_lpm = false;
spin_lock(&usb_bam_ipa_handshake_info_lock);
info[cur_bam].bus_suspend = 0;
spin_unlock(&usb_bam_ipa_handshake_info_lock);
queue_work(ctx->usb_bam_wq, &info[cur_bam].resume_work);
}
static void _msm_bam_wait_for_host_prod_granted(enum usb_ctrl bam_type)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
spin_lock(&ctx->usb_bam_lock);
log_event_dbg("%s: enter bam=%s\n", __func__,
bam_enable_strings[bam_type]);
ctx->is_bam_inactivity = false;
/* Get back to resume state including wakeup ipa */
usb_bam_resume_core(bam_type, USB_BAM_HOST);
/* Ensure getting the producer resource */
wait_for_prod_granted(bam_type);
spin_unlock(&ctx->usb_bam_lock);
}
void msm_bam_wait_for_hsic_host_prod_granted(void)
{
log_event_dbg("%s: start\n", __func__);
_msm_bam_wait_for_host_prod_granted(HSIC_CTRL);
}
static void _msm_bam_host_notify_on_resume(enum usb_ctrl bam_type)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
spin_lock(&ctx->usb_bam_lock);
log_event_dbg("%s: enter bam=%s\n", __func__,
bam_enable_strings[bam_type]);
host_info[bam_type].in_lpm = false;
/* HSIC resume completed. Notify CONS grant if CONS was requested */
notify_usb_connected(bam_type);
/*
* This function is called to notify the usb bam driver
* that the hsic core and hsic bam hw are fully resumed
* and clocked on. Therefore we can now set the inactivity
* timer to the hsic bam hw.
*/
if (ctx->inactivity_timer_ms)
usb_bam_set_inactivity_timer(bam_type);
spin_unlock(&ctx->usb_bam_lock);
}
static bool msm_bam_host_lpm_ok(enum usb_ctrl bam_type)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
struct usb_bam_pipe_connect *pipe_iter;
int i;
log_event_dbg("%s: enter bam=%s\n", __func__,
bam_enable_strings[bam_type]);
if (!host_info[bam_type].dev)
return true;
log_event_dbg("%s: Starting hsic full suspend sequence\n",
__func__);
/*
* Start low power mode by releasing the device only if the resources
* were indeed released and we are still in inactivity state (wakeup
* event has not occurred while we were waiting for resources release
*/
spin_lock(&ctx->usb_bam_lock);
if (info[bam_type].cur_cons_state == IPA_RM_RESOURCE_RELEASED &&
info[bam_type].cur_prod_state == IPA_RM_RESOURCE_RELEASED &&
ctx->is_bam_inactivity && info[bam_type].in_lpm) {
pr_debug("%s(): checking HSIC Host pipe state\n", __func__);
if (!msm_bam_hsic_host_pipe_empty()) {
log_event_err("%s(): HSIC HOST Pipe is not empty\n",
__func__);
spin_unlock(&ctx->usb_bam_lock);
return false;
}
/* HSIC host will go now to lpm */
log_event_dbg("%s: vote for suspend hsic %p\n",
__func__, host_info[bam_type].dev);
for (i = 0; i < ctx->max_connections; i++) {
pipe_iter = &ctx->usb_bam_connections[i];
if (pipe_iter->bam_type == bam_type &&
pipe_iter->enabled && !pipe_iter->suspended)
pipe_iter->suspended = true;
}
host_info[bam_type].in_lpm = true;
spin_unlock(&ctx->usb_bam_lock);
return true;
}
/* We don't allow lpm, therefore renew our vote here */
if (info[bam_type].in_lpm) {
log_event_dbg("%s: Not allow lpm while ref count=0\n",
__func__);
log_event_dbg("%s: inactivity=%d, c_s=%d p_s=%d\n", __func__,
ctx->is_bam_inactivity, info[bam_type].cur_cons_state,
info[bam_type].cur_prod_state);
pm_runtime_get(host_info[bam_type].dev);
info[bam_type].in_lpm = false;
spin_unlock(&ctx->usb_bam_lock);
} else {
spin_unlock(&ctx->usb_bam_lock);
}
return false;
}
void msm_bam_hsic_host_notify_on_resume(void)
{
_msm_bam_host_notify_on_resume(HSIC_CTRL);
}
static int usb_bam_set_ipa_perf(enum usb_ctrl cur_bam,
enum usb_bam_pipe_dir dir,
enum usb_device_speed usb_connection_speed)
{
int ret;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
struct ipa_rm_perf_profile ipa_rm_perf_prof;
struct msm_usb_bam_platform_data *pdata =
ctx->usb_bam_pdev->dev.platform_data;
if (usb_connection_speed == USB_SPEED_SUPER)
ipa_rm_perf_prof.max_supported_bandwidth_mbps =
pdata->max_mbps_superspeed;
else
/* Bam2Bam is supported only for SS and HS (HW limitation) */
ipa_rm_perf_prof.max_supported_bandwidth_mbps =
pdata->max_mbps_highspeed;
/*
* Having a max mbps property in dtsi file is a must
* for target with IPA capability.
*/
if (!ipa_rm_perf_prof.max_supported_bandwidth_mbps) {
log_event_err("%s: Max mbps is required for speed %d\n",
__func__, usb_connection_speed);
return -EINVAL;
}
if (dir == USB_TO_PEER_PERIPHERAL) {
log_event_dbg("%s: vote ipa_perf resource=%d perf=%d mbps\n",
__func__, ipa_rm_resource_prod[cur_bam],
ipa_rm_perf_prof.max_supported_bandwidth_mbps);
ret = ipa_rm_set_perf_profile(ipa_rm_resource_prod[cur_bam],
&ipa_rm_perf_prof);
} else {
log_event_dbg("%s: vote ipa_perf resource=%d perf=%d mbps\n",
__func__, ipa_rm_resource_cons[cur_bam],
ipa_rm_perf_prof.max_supported_bandwidth_mbps);
ret = ipa_rm_set_perf_profile(ipa_rm_resource_cons[cur_bam],
&ipa_rm_perf_prof);
}
return ret;
}
int usb_bam_connect_ipa(enum usb_ctrl cur_bam,
struct usb_bam_connect_ipa_params *ipa_params)
{
u8 idx;
enum usb_bam_mode cur_mode;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
struct usb_bam_pipe_connect *pipe_connect;
struct device *bam_dev = &ctx->usb_bam_pdev->dev;
struct msm_usb_bam_platform_data *pdata = bam_dev->platform_data;
int ret;
bool bam2bam, is_dpl;
log_event_dbg("%s: start\n", __func__);
if (!ipa_params) {
log_event_err("%s: Invalid ipa params\n",
__func__);
return -EINVAL;
}
if (ipa_params->dir == USB_TO_PEER_PERIPHERAL)
idx = ipa_params->src_idx;
else
idx = ipa_params->dst_idx;
if (idx >= ctx->max_connections) {
log_event_err("%s: Invalid connection index\n",
__func__);
return -EINVAL;
}
pipe_connect = &ctx->usb_bam_connections[idx];
if (pipe_connect->enabled) {
log_event_err("%s: connection %d was already established\n",
__func__, idx);
return 0;
}
ret = usb_bam_set_ipa_perf(pipe_connect->bam_type, ipa_params->dir,
ipa_params->usb_connection_speed);
if (ret) {
log_event_err("%s: call to usb_bam_set_ipa_perf failed %d\n",
__func__, ret);
return ret;
}
log_event_dbg("%s: enter\n", __func__);
cur_mode = pipe_connect->bam_mode;
bam2bam = (pipe_connect->pipe_type == USB_BAM_PIPE_BAM2BAM);
if (ipa_params->dst_client == IPA_CLIENT_USB_DPL_CONS)
is_dpl = true;
else
is_dpl = false;
/* Set the BAM mode (host/device) according to connected pipe */
info[cur_bam].cur_bam_mode = pipe_connect->bam_mode;
if (cur_mode == USB_BAM_DEVICE) {
mutex_lock(&info[cur_bam].suspend_resume_mutex);
spin_lock(&ctx->usb_bam_lock);
if (ctx->pipes_enabled_per_bam == 0) {
spin_unlock(&ctx->usb_bam_lock);
spin_lock(&usb_bam_ipa_handshake_info_lock);
info[cur_bam].connect_complete = 0;
info[cur_bam].disconnected = 0;
info[cur_bam].bus_suspend = 0;
info[cur_bam].pipes_suspended = 0;
info[cur_bam].pipes_to_suspend = 0;
info[cur_bam].pipes_resumed = 0;
spin_unlock(&usb_bam_ipa_handshake_info_lock);
} else {
spin_unlock(&ctx->usb_bam_lock);
}
pipe_connect->cons_stopped = 0;
pipe_connect->prod_stopped = 0;
}
log_event_dbg("%s: PM Runtime GET %d, count: %d\n",
__func__, idx, get_pm_runtime_counter(bam_dev));
pm_runtime_get_sync(bam_dev);
/* Check if BAM requires RESET before connect and reset first pipe */
spin_lock(&ctx->usb_bam_lock);
if (pdata->reset_on_connect && !ctx->pipes_enabled_per_bam) {
spin_unlock(&ctx->usb_bam_lock);
if (cur_bam == CI_CTRL)
msm_hw_bam_disable(1);
sps_device_reset(ctx->h_bam);
if (cur_bam == CI_CTRL)
msm_hw_bam_disable(0);
/* On re-connect assume out from lpm for HOST BAM */
if (cur_mode == USB_BAM_HOST)
usb_bam_resume_core(cur_bam, cur_mode);
/* On re-connect assume out from lpm for all BAMs */
info[cur_bam].in_lpm = false;
} else {
spin_unlock(&ctx->usb_bam_lock);
if (!ctx->pipes_enabled_per_bam)
pr_debug("No BAM reset on connect, just pipe reset\n");
}
if (ipa_params->dir == USB_TO_PEER_PERIPHERAL) {
if (info[cur_bam].prod_pipes_enabled_per_bam == 0)
wait_for_prod_granted(cur_bam);
info[cur_bam].prod_pipes_enabled_per_bam += 1;
}
if (bam2bam)
ret = connect_pipe_bam2bam_ipa(cur_bam, idx, ipa_params);
else
ret = connect_pipe_sys2bam_ipa(cur_bam, idx, ipa_params);
if (ret) {
log_event_err("%s: pipe connection failure RT PUT: %d\n",
__func__, get_pm_runtime_counter(bam_dev));
pm_runtime_put_sync(bam_dev);
if (cur_mode == USB_BAM_DEVICE)
mutex_unlock(&info[cur_bam].suspend_resume_mutex);
return ret;
}
log_event_dbg("%s: pipe connection success\n", __func__);
spin_lock(&ctx->usb_bam_lock);
pipe_connect->enabled = 1;
pipe_connect->suspended = 0;
/* Set global inactivity timer upon first pipe connection */
if (!ctx->pipes_enabled_per_bam && ctx->inactivity_timer_ms &&
pipe_connect->inactivity_notify && bam2bam)
usb_bam_set_inactivity_timer(cur_bam);
ctx->pipes_enabled_per_bam += 1;
/*
* Notify USB connected on the first two pipes connected for
* tethered function's producer and consumer only. Current
* understanding is that there won't be more than 3 pipes used
* in USB BAM2BAM IPA mode i.e. 2 consumers and 1 producer.
* If more producer and consumer pipe are being used, this
* logic is required to be revisited here.
*/
if (ctx->pipes_enabled_per_bam >= 2 &&
ipa_params->dir == PEER_PERIPHERAL_TO_USB && !is_dpl)
notify_usb_connected(cur_bam);
spin_unlock(&ctx->usb_bam_lock);
if (cur_mode == USB_BAM_DEVICE)
mutex_unlock(&info[cur_bam].suspend_resume_mutex);
log_event_dbg("%s: done\n", __func__);
return 0;
}
EXPORT_SYMBOL(usb_bam_connect_ipa);
int usb_bam_get_pipe_type(enum usb_ctrl bam_type, u8 idx,
enum usb_bam_pipe_type *type)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
struct usb_bam_pipe_connect *pipe_connect =
&ctx->usb_bam_connections[idx];
if (idx >= ctx->max_connections) {
log_event_err("%s: Invalid connection index\n", __func__);
return -EINVAL;
}
if (!type) {
log_event_err("%s: null pointer provided for type\n", __func__);
return -EINVAL;
} else {
*type = pipe_connect->pipe_type;
}
return 0;
}
EXPORT_SYMBOL(usb_bam_get_pipe_type);
static void usb_bam_work(struct work_struct *w)
{
int i;
struct usb_bam_event_info *event_info =
container_of(w, struct usb_bam_event_info, event_w);
struct usb_bam_pipe_connect *pipe_connect =
container_of(event_info, struct usb_bam_pipe_connect, event);
struct usb_bam_ctx_type *ctx = &msm_usb_bam[pipe_connect->bam_type];
struct usb_bam_pipe_connect *pipe_iter;
int (*callback)(void *priv);
void *param = NULL;
switch (event_info->type) {
case USB_BAM_EVENT_WAKEUP:
case USB_BAM_EVENT_WAKEUP_PIPE:
log_event_dbg("%s received USB_BAM_EVENT_WAKEUP\n", __func__);
/*
* Make sure the PROD resource is granted before
* wakeup hsic host class driver (done by the callback below)
*/
if (pipe_connect->peer_bam == IPA_P_BAM &&
pipe_connect->bam_mode == USB_BAM_HOST &&
info[pipe_connect->bam_type].cur_prod_state
!= IPA_RM_RESOURCE_GRANTED) {
wait_for_prod_granted(pipe_connect->bam_type);
}
/*
* Check if need to resume the hsic host.
* On one hand, since we got the wakeup interrupt
* the hsic bam clocks are already enabled, so no need
* to actualluy resume the hardware... However, we still need
* to update the usb bam driver state (to set in_lpm=false),
* and to wake ipa and to hold again the hsic host
* device again to avoid it going to low poer mode next time
* until we complete releasing the hsic consumer and producer
* resources against the ipa resource manager.
*/
spin_lock(&ctx->usb_bam_lock);
if (pipe_connect->bam_mode == USB_BAM_HOST)
usb_bam_resume_host(pipe_connect->bam_type);
spin_unlock(&ctx->usb_bam_lock);
/* Notify about wakeup / activity of the bam */
if (event_info->callback)
event_info->callback(event_info->param);
/*
* Reset inactivity timer counter if this pipe's bam
* has inactivity timeout.
*/
spin_lock(&ctx->usb_bam_lock);
if (ctx->inactivity_timer_ms)
usb_bam_set_inactivity_timer(pipe_connect->bam_type);
spin_unlock(&ctx->usb_bam_lock);
if (pipe_connect->bam_mode == USB_BAM_DEVICE) {
/* A2 wakeup not from LPM (CONS was up) */
wait_for_prod_granted(pipe_connect->bam_type);
if (pipe_connect->start) {
log_event_dbg("%s: Enqueue PROD transfer\n",
__func__);
pipe_connect->start(
pipe_connect->start_stop_param,
USB_TO_PEER_PERIPHERAL);
}
}
break;
case USB_BAM_EVENT_INACTIVITY:
log_event_dbg("%s received USB_BAM_EVENT_INACTIVITY\n",
__func__);
/*
* Since event info is one structure per pipe, it might be
* overriden when we will register the wakeup events below,
* and still we want ot register the wakeup events before we
* notify on the inactivity in order to identify the next
* activity as soon as possible.
*/
callback = event_info->callback;
param = event_info->param;
/*
* Upon inactivity, configure wakeup irq for all pipes
* that are into the usb bam.
*/
spin_lock(&ctx->usb_bam_lock);
for (i = 0; i < ctx->max_connections; i++) {
pipe_iter = &ctx->usb_bam_connections[i];
if (pipe_iter->bam_type == pipe_connect->bam_type &&
pipe_iter->dir == PEER_PERIPHERAL_TO_USB &&
pipe_iter->enabled) {
log_event_dbg("%s: Register wakeup on pipe %p\n",
__func__, pipe_iter);
__usb_bam_register_wake_cb(
pipe_connect->bam_type, i,
pipe_iter->activity_notify,
pipe_iter->priv,
false);
}
}
spin_unlock(&ctx->usb_bam_lock);
/* Notify about the inactivity to the USB class driver */
if (callback)
callback(param);
wait_for_prod_release(pipe_connect->bam_type);
log_event_dbg("%s: complete wait on hsic producer s=%d\n",
__func__, info[pipe_connect->bam_type].cur_prod_state);
/*
* Allow to go to lpm for now if also consumer is down.
* If consumer is up, we will wait to the release consumer
* notification.
*/
if (host_info[pipe_connect->bam_type].dev &&
info[pipe_connect->bam_type].cur_cons_state ==
IPA_RM_RESOURCE_RELEASED &&
!info[pipe_connect->bam_type].in_lpm) {
usb_bam_suspend_core(pipe_connect->bam_type,
pipe_connect->bam_mode, 1);
}
break;
default:
log_event_err("%s: unknown usb bam event type %d\n", __func__,
event_info->type);
}
}
static void usb_bam_wake_cb(struct sps_event_notify *notify)
{
struct usb_bam_event_info *event_info =
(struct usb_bam_event_info *)notify->user;
struct usb_bam_pipe_connect *pipe_connect =
container_of(event_info,
struct usb_bam_pipe_connect,
event);
enum usb_ctrl bam = pipe_connect->bam_type;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam];
spin_lock(&ctx->usb_bam_lock);
if (event_info->type == USB_BAM_EVENT_WAKEUP_PIPE)
queue_work(ctx->usb_bam_wq, &event_info->event_w);
else if (event_info->type == USB_BAM_EVENT_WAKEUP &&
ctx->is_bam_inactivity) {
/*
* Sps wake event is per pipe, so usb_bam_wake_cb is
* called per pipe. However, we want to filter the wake
* event to be wake event per all the pipes.
* Therefore, the first pipe that awaked will be considered
* as global bam wake event.
*/
ctx->is_bam_inactivity = false;
queue_work(ctx->usb_bam_wq, &event_info->event_w);
}
spin_unlock(&ctx->usb_bam_lock);
}
static int __usb_bam_register_wake_cb(enum usb_ctrl bam_type, int idx,
int (*callback)(void *user), void *param,
bool trigger_cb_per_pipe)
{
struct sps_pipe *pipe;
struct sps_connect *sps_connection;
struct usb_bam_pipe_connect *pipe_connect;
struct usb_bam_event_info *wake_event_info;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
int ret;
if (idx < 0 || idx > ctx->max_connections) {
log_event_err("%s:idx is wrong %d\n", __func__, idx);
return -EINVAL;
}
pipe = ctx->usb_bam_sps.sps_pipes[idx];
sps_connection = &ctx->usb_bam_sps.sps_connections[idx];
pipe_connect = &ctx->usb_bam_connections[idx];
wake_event_info = &pipe_connect->event;
wake_event_info->type = (trigger_cb_per_pipe ?
USB_BAM_EVENT_WAKEUP_PIPE :
USB_BAM_EVENT_WAKEUP);
wake_event_info->param = param;
wake_event_info->callback = callback;
wake_event_info->event.mode = SPS_TRIGGER_CALLBACK;
wake_event_info->event.xfer_done = NULL;
wake_event_info->event.callback = callback ? usb_bam_wake_cb : NULL;
wake_event_info->event.user = wake_event_info;
wake_event_info->event.options = SPS_O_WAKEUP;
ret = sps_register_event(pipe, &wake_event_info->event);
if (ret) {
log_event_err("%s: sps_register_event() failed %d\n",
__func__, ret);
return ret;
}
sps_connection->options = callback ?
(SPS_O_AUTO_ENABLE | SPS_O_WAKEUP | SPS_O_WAKEUP_IS_ONESHOT) :
SPS_O_AUTO_ENABLE;
ret = sps_set_config(pipe, sps_connection);
if (ret) {
log_event_err("%s: sps_set_config() failed %d\n",
__func__, ret);
return ret;
}
log_event_dbg("%s: success\n", __func__);
return 0;
}
int usb_bam_register_wake_cb(enum usb_ctrl bam_type, u8 idx,
int (*callback)(void *user), void *param)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
struct usb_bam_pipe_connect *pipe_connect =
&ctx->usb_bam_connections[idx];
info[pipe_connect->bam_type].wake_cb = callback;
info[pipe_connect->bam_type].wake_param = param;
return __usb_bam_register_wake_cb(bam_type, idx, callback, param, true);
}
int usb_bam_register_start_stop_cbs(enum usb_ctrl bam_type, u8 dst_idx,
void (*start)(void *, enum usb_bam_pipe_dir),
void (*stop)(void *, enum usb_bam_pipe_dir), void *param)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
struct usb_bam_pipe_connect *pipe_connect =
&ctx->usb_bam_connections[dst_idx];
log_event_dbg("%s: Register for %d\n", __func__, dst_idx);
pipe_connect->start = start;
pipe_connect->stop = stop;
pipe_connect->start_stop_param = param;
return 0;
}
int usb_bam_disconnect_pipe(enum usb_ctrl bam_type, u8 idx)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
struct usb_bam_pipe_connect *pipe_connect;
struct device *bam_dev = &ctx->usb_bam_pdev->dev;
int ret;
struct msm_usb_bam_platform_data *pdata =
ctx->usb_bam_pdev->dev.platform_data;
pipe_connect = &ctx->usb_bam_connections[idx];
if (!pipe_connect->enabled) {
log_event_err("%s: connection %d isn't enabled\n",
__func__, idx);
return 0;
}
ret = disconnect_pipe(bam_type, idx);
if (ret) {
log_event_err("%s: src pipe disconnection failure\n", __func__);
return ret;
}
pipe_connect->enabled = 0;
spin_lock(&ctx->usb_bam_lock);
if (!ctx->pipes_enabled_per_bam) {
log_event_err("%s: wrong pipes enabled counter for bam_type=%d\n",
__func__, bam_type);
} else {
ctx->pipes_enabled_per_bam -= 1;
}
spin_unlock(&ctx->usb_bam_lock);
log_event_dbg("%s: success disconnecting pipe %d\n", __func__, idx);
if (pdata->reset_on_disconnect && !ctx->pipes_enabled_per_bam) {
if (bam_type == CI_CTRL)
msm_hw_bam_disable(1);
sps_device_reset(ctx->h_bam);
if (bam_type == CI_CTRL)
msm_hw_bam_disable(0);
/* Enable usb irq here which is disabled in function drivers
* during disconnect after BAM reset.
*/
if (bam_type == CI_CTRL)
msm_usb_irq_disable(false);
}
/* This function is directly called by USB Transport drivers
* to disconnect pipes. Drop runtime usage count here. For
* IPA, caller takes care of it
*/
if (pipe_connect->peer_bam != IPA_P_BAM) {
log_event_dbg("%s: PM Runtime PUT %d, count: %d\n",
__func__, idx, get_pm_runtime_counter(bam_dev));
pm_runtime_put_sync(bam_dev);
}
return 0;
}
/**
* is_ipa_hanlde_valid: Check if ipa_handle is valid or not
* @ipa_handle: IPA Handle for producer or consumer
*
* Returns true is ipa handle is valid.
*/
static bool is_ipa_handle_valid(u32 ipa_handle)
{
return (ipa_handle != -1);
}
int usb_bam_disconnect_ipa(enum usb_ctrl cur_bam,
struct usb_bam_connect_ipa_params *ipa_params)
{
int ret = 0, pipes_disconncted = 0;
u8 idx = 0;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[cur_bam];
struct usb_bam_pipe_connect *pipe_connect;
struct device *bam_dev = &ctx->usb_bam_pdev->dev;
enum usb_bam_mode bam_mode;
if (!is_ipa_handle_valid(ipa_params->prod_clnt_hdl) &&
!is_ipa_handle_valid(ipa_params->cons_clnt_hdl)) {
log_event_err("%s: Both IPA handles are invalid.\n", __func__);
return -EINVAL;
}
log_event_dbg("%s: Starting disconnect sequence\n", __func__);
log_event_dbg("%s(): prod_clnt_hdl:%d cons_clnt_hdl:%d\n", __func__,
ipa_params->prod_clnt_hdl, ipa_params->cons_clnt_hdl);
if (is_ipa_handle_valid(ipa_params->prod_clnt_hdl))
idx = ipa_params->dst_idx;
if (is_ipa_handle_valid(ipa_params->cons_clnt_hdl))
idx = ipa_params->src_idx;
pipe_connect = &ctx->usb_bam_connections[idx];
bam_mode = pipe_connect->bam_mode;
if (bam_mode != USB_BAM_DEVICE)
return -EINVAL;
mutex_lock(&info[cur_bam].suspend_resume_mutex);
/* Delay USB core to go into lpm before we finish our handshake */
if (is_ipa_handle_valid(ipa_params->prod_clnt_hdl)) {
ret = usb_bam_disconnect_ipa_prod(ipa_params, cur_bam);
if (ret)
goto out;
pipes_disconncted++;
}
if (is_ipa_handle_valid(ipa_params->cons_clnt_hdl)) {
ret = usb_bam_disconnect_ipa_cons(ipa_params, cur_bam);
if (ret)
goto out;
pipes_disconncted++;
}
/* Notify CONS release on the last cons pipe released */
if (!ctx->pipes_enabled_per_bam) {
if (info[cur_bam].cur_cons_state ==
IPA_RM_RESOURCE_RELEASED) {
log_event_dbg("%s: Notify CONS_RELEASED\n", __func__);
ipa_rm_notify_completion(
IPA_RM_RESOURCE_RELEASED,
ipa_rm_resource_cons[cur_bam]);
}
}
out:
/* Pipes are connected one by one, but can get disconnected in pairs */
while (pipes_disconncted--) {
if (!info[cur_bam].pipes_suspended) {
log_event_dbg("%s: PM Runtime PUT %d, count: %d\n",
__func__, pipes_disconncted,
get_pm_runtime_counter(bam_dev));
pm_runtime_put_sync(&ctx->usb_bam_pdev->dev);
}
}
mutex_unlock(&info[cur_bam].suspend_resume_mutex);
return ret;
}
EXPORT_SYMBOL(usb_bam_disconnect_ipa);
static void usb_bam_sps_events(enum sps_callback_case sps_cb_case, void *user)
{
int i;
int bam;
struct usb_bam_ctx_type *ctx;
struct usb_bam_pipe_connect *pipe_connect;
struct usb_bam_event_info *event_info;
switch (sps_cb_case) {
case SPS_CALLBACK_BAM_TIMER_IRQ:
log_event_dbg("%s: received SPS_CALLBACK_BAM_TIMER_IRQ\n",
__func__);
spin_lock(&ctx->usb_bam_lock);
bam = get_bam_type_from_core_name((char *)user);
if (bam < 0 || bam >= MAX_BAMS) {
log_event_err("%s: Invalid bam, type=%d ,name=%s\n",
__func__, bam, (char *)user);
spin_unlock(&ctx->usb_bam_lock);
return;
}
ctx = &msm_usb_bam[bam];
ctx->is_bam_inactivity = true;
log_event_dbg("%s: Inactivity happened on bam=%s,%d\n",
__func__, (char *)user, bam);
for (i = 0; i < ctx->max_connections; i++) {
pipe_connect = &ctx->usb_bam_connections[i];
/*
* Notify inactivity once, Since it is global
* for all pipes on bam. Notify only if we have
* connected pipes.
*/
if (pipe_connect->enabled) {
event_info = &pipe_connect->event;
event_info->type = USB_BAM_EVENT_INACTIVITY;
event_info->param = pipe_connect->priv;
event_info->callback =
pipe_connect->inactivity_notify;
queue_work(ctx->usb_bam_wq,
&event_info->event_w);
break;
}
}
spin_unlock(&ctx->usb_bam_lock);
break;
default:
log_event_dbg("%s: received sps_cb_case=%d\n", __func__,
(int)sps_cb_case);
}
}
static struct msm_usb_bam_platform_data *usb_bam_dt_to_pdata(
struct platform_device *pdev, u32 usb_addr)
{
struct msm_usb_bam_platform_data *pdata;
struct device_node *node = pdev->dev.of_node;
int rc = 0;
u8 i = 0;
u32 bam, bam_mode;
u32 addr;
u32 threshold, max_connections = 0;
static struct usb_bam_pipe_connect *usb_bam_connections;
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata) {
return NULL;
}
rc = of_property_read_u32(node, "qcom,bam-type", &bam);
if (rc) {
log_event_err("%s: bam type is missing in device tree\n",
__func__);
return NULL;
}
if (bam >= MAX_BAMS) {
log_event_err("%s: Invalid bam type %d in device tree\n",
__func__, bam);
return NULL;
}
pdata->bam_type = bam;
rc = of_property_read_u32(node, "qcom,bam-mode", &bam_mode);
if (rc) {
pr_debug("%s: bam mode is missing in device tree\n",
__func__);
/* Default to DEVICE if bam_mode is not specified */
bam_mode = USB_BAM_DEVICE;
}
pdata->reset_on_connect = of_property_read_bool(node,
"qcom,reset-bam-on-connect");
pdata->reset_on_disconnect = of_property_read_bool(node,
"qcom,reset-bam-on-disconnect");
rc = of_property_read_u32(node, "qcom,usb-bam-num-pipes",
&pdata->usb_bam_num_pipes);
if (rc) {
log_event_err("Invalid usb bam num pipes property\n");
return NULL;
}
rc = of_property_read_u32(node, "qcom,usb-bam-max-mbps-highspeed",
&pdata->max_mbps_highspeed);
if (rc)
pdata->max_mbps_highspeed = 0;
rc = of_property_read_u32(node, "qcom,usb-bam-max-mbps-superspeed",
&pdata->max_mbps_superspeed);
if (rc)
pdata->max_mbps_superspeed = 0;
rc = of_property_read_u32(node, "qcom,usb-bam-fifo-baseaddr", &addr);
if (rc)
pr_debug("%s: Invalid usb base address property\n", __func__);
else
pdata->usb_bam_fifo_baseaddr = addr;
pdata->ignore_core_reset_ack = of_property_read_bool(node,
"qcom,ignore-core-reset-ack");
pdata->disable_clk_gating = of_property_read_bool(node,
"qcom,disable-clk-gating");
rc = of_property_read_u32(node, "qcom,usb-bam-override-threshold",
&threshold);
if (rc)
pdata->override_threshold = USB_THRESHOLD;
else
pdata->override_threshold = threshold;
pdata->enable_hsusb_bam_on_boot = of_property_read_bool(node,
"qcom,enable-hsusb-bam-on-boot");
for_each_child_of_node(pdev->dev.of_node, node)
max_connections++;
if (!max_connections) {
log_event_err("%s: error: max_connections is zero\n", __func__);
goto err;
}
usb_bam_connections = devm_kzalloc(&pdev->dev, max_connections *
sizeof(struct usb_bam_pipe_connect), GFP_KERNEL);
if (!usb_bam_connections) {
log_event_err("%s: devm_kzalloc failed(%d)\n",
__func__, __LINE__);
return NULL;
}
/* retrieve device tree parameters */
for_each_child_of_node(pdev->dev.of_node, node) {
usb_bam_connections[i].bam_type = bam;
usb_bam_connections[i].bam_mode = bam_mode;
rc = of_property_read_string(node, "label",
&usb_bam_connections[i].name);
if (rc)
goto err;
rc = of_property_read_u32(node, "qcom,usb-bam-mem-type",
&usb_bam_connections[i].mem_type);
if (rc)
goto err;
if (usb_bam_connections[i].mem_type == OCI_MEM) {
if (!pdata->usb_bam_fifo_baseaddr) {
log_event_err("%s: base address is missing\n",
__func__);
goto err;
}
}
rc = of_property_read_u32(node, "qcom,peer-bam",
&usb_bam_connections[i].peer_bam);
if (rc) {
log_event_err("%s: peer bam is missing in device tree\n",
__func__);
goto err;
}
/*
* Store USB bam_type to be used with QDSS. As only one device
* bam is currently supported, check the same in DT connections
*/
if (usb_bam_connections[i].peer_bam == QDSS_P_BAM) {
if (qdss_usb_bam_type) {
log_event_err("%s: overriding QDSS pipe!, update DT\n",
__func__);
}
qdss_usb_bam_type = usb_bam_connections[i].bam_type;
}
rc = of_property_read_u32(node, "qcom,dir",
&usb_bam_connections[i].dir);
if (rc) {
log_event_err("%s: direction is missing in device tree\n",
__func__);
goto err;
}
rc = of_property_read_u32(node, "qcom,pipe-num",
&usb_bam_connections[i].pipe_num);
if (rc) {
log_event_err("%s: pipe num is missing in device tree\n",
__func__);
goto err;
}
rc = of_property_read_u32(node, "qcom,pipe-connection-type",
&usb_bam_connections[i].pipe_type);
if (rc)
pr_debug("%s: pipe type is defaulting to bam2bam\n",
__func__);
of_property_read_u32(node, "qcom,peer-bam-physical-address",
&addr);
if (usb_bam_connections[i].dir == USB_TO_PEER_PERIPHERAL) {
usb_bam_connections[i].src_phy_addr = usb_addr;
usb_bam_connections[i].dst_phy_addr = addr;
} else {
usb_bam_connections[i].src_phy_addr = addr;
usb_bam_connections[i].dst_phy_addr = usb_addr;
}
of_property_read_u32(node, "qcom,src-bam-pipe-index",
&usb_bam_connections[i].src_pipe_index);
of_property_read_u32(node, "qcom,dst-bam-pipe-index",
&usb_bam_connections[i].dst_pipe_index);
of_property_read_u32(node, "qcom,data-fifo-offset",
&usb_bam_connections[i].data_fifo_base_offset);
rc = of_property_read_u32(node, "qcom,data-fifo-size",
&usb_bam_connections[i].data_fifo_size);
if (rc)
goto err;
of_property_read_u32(node, "qcom,descriptor-fifo-offset",
&usb_bam_connections[i].desc_fifo_base_offset);
rc = of_property_read_u32(node, "qcom,descriptor-fifo-size",
&usb_bam_connections[i].desc_fifo_size);
if (rc)
goto err;
i++;
}
msm_usb_bam[bam].usb_bam_connections = usb_bam_connections;
msm_usb_bam[bam].max_connections = max_connections;
return pdata;
err:
log_event_err("%s: failed\n", __func__);
return NULL;
}
static int usb_bam_init(struct platform_device *pdev)
{
int ret;
struct msm_usb_bam_platform_data *pdata = pdev->dev.platform_data;
enum usb_ctrl bam_type = pdata->bam_type;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
struct sps_bam_props props;
memset(&props, 0, sizeof(props));
pr_debug("%s: usb_bam_init - %s\n", __func__,
bam_enable_strings[bam_type]);
props.phys_addr = ctx->io_res->start;
props.virt_addr = ctx->regs;
props.virt_size = resource_size(ctx->io_res);
props.irq = ctx->irq;
props.summing_threshold = pdata->override_threshold;
props.event_threshold = pdata->override_threshold;
props.num_pipes = pdata->usb_bam_num_pipes;
props.callback = usb_bam_sps_events;
props.user = bam_enable_strings[bam_type];
/*
* HSUSB and HSIC Cores don't support RESET ACK signal to BAMs
* Hence, let BAM to ignore acknowledge from USB while resetting PIPE
*/
if (pdata->ignore_core_reset_ack && bam_type != DWC3_CTRL)
props.options = SPS_BAM_NO_EXT_P_RST;
if (pdata->disable_clk_gating)
props.options |= SPS_BAM_NO_LOCAL_CLK_GATING;
/*
* HSUSB BAM is not NDP BAM and it must be enabled early before
* starting peripheral controller to avoid switching USB core mode
* from legacy to BAM with ongoing data transfers.
*/
if (pdata->enable_hsusb_bam_on_boot && bam_type == CI_CTRL) {
pr_debug("Register and enable HSUSB BAM\n");
props.options |= SPS_BAM_OPT_ENABLE_AT_BOOT;
}
ret = sps_register_bam_device(&props, &ctx->h_bam);
if (ret < 0) {
log_event_err("%s: register bam error %d\n", __func__, ret);
return -EFAULT;
}
return 0;
}
static int enable_usb_bam(struct platform_device *pdev)
{
int ret;
struct msm_usb_bam_platform_data *pdata = pdev->dev.platform_data;
enum usb_ctrl bam_type = pdata->bam_type;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
ret = usb_bam_init(pdev);
if (ret) {
log_event_err("failed to init bam %s\n",
bam_enable_strings[bam_type]);
return ret;
}
ctx->usb_bam_sps.sps_pipes = devm_kzalloc(&pdev->dev,
ctx->max_connections * sizeof(struct sps_pipe *),
GFP_KERNEL);
if (!ctx->usb_bam_sps.sps_pipes) {
log_event_err("%s: failed to allocate sps_pipes\n", __func__);
return -ENOMEM;
}
ctx->usb_bam_sps.sps_connections = devm_kzalloc(&pdev->dev,
ctx->max_connections * sizeof(struct sps_connect),
GFP_KERNEL);
if (!ctx->usb_bam_sps.sps_connections) {
log_event_err("%s: failed to allocate sps_connections\n",
__func__);
return -ENOMEM;
}
return 0;
}
static ssize_t
usb_bam_show_inactivity_timer(struct device *dev, struct device_attribute *attr,
char *buf)
{
char *buff = buf;
int i;
for (i = 0; i < ARRAY_SIZE(bam_enable_strings); i++) {
buff += snprintf(buff, PAGE_SIZE, "%s: %dms\n",
bam_enable_strings[i],
msm_usb_bam[i].inactivity_timer_ms);
}
return buff - buf;
}
static ssize_t usb_bam_store_inactivity_timer(struct device *dev,
struct device_attribute *attr,
const char *buff, size_t count)
{
char buf[USB_BAM_MAX_STR_LEN];
char *trimmed_buf, *bam_str, *bam_name, *timer;
int timer_d;
int bam;
if (strnstr(buff, "help", USB_BAM_MAX_STR_LEN)) {
pr_info("Usage: <bam_name> <ms>,<bam_name> <ms>,...\n");
pr_info("\tbam_name: [%s, %s, %s]\n",
bam_enable_strings[DWC3_CTRL],
bam_enable_strings[CI_CTRL],
bam_enable_strings[HSIC_CTRL]);
pr_info("\tms: time in ms. Use 0 to disable timer\n");
return count;
}
strlcpy(buf, buff, sizeof(buf));
trimmed_buf = strim(buf);
while (trimmed_buf) {
bam_str = strsep(&trimmed_buf, ",");
if (bam_str) {
bam_name = strsep(&bam_str, " ");
bam = get_bam_type_from_core_name(bam_name);
if (bam < 0 || bam >= MAX_BAMS) {
log_event_err("%s: Invalid bam, type=%d ,name=%s\n",
__func__, bam, bam_name);
return -EINVAL;
}
timer = strsep(&bam_str, " ");
if (!timer)
continue;
sscanf(timer, "%d", &timer_d);
/* Apply new timer setting if bam has running pipes */
if (msm_usb_bam[bam].inactivity_timer_ms != timer_d) {
msm_usb_bam[bam].inactivity_timer_ms = timer_d;
if (msm_usb_bam[bam].pipes_enabled_per_bam > 0
&& !info[bam].in_lpm)
usb_bam_set_inactivity_timer(bam);
}
}
}
return count;
}
static DEVICE_ATTR(inactivity_timer, S_IWUSR | S_IRUSR,
usb_bam_show_inactivity_timer,
usb_bam_store_inactivity_timer);
static int usb_bam_panic_notifier(struct notifier_block *this,
unsigned long event, void *ptr)
{
int i;
struct usb_bam_ctx_type *ctx;
for (i = 0; i < MAX_BAMS; i++) {
ctx = &msm_usb_bam[i];
if (ctx->h_bam)
break;
}
if (i == MAX_BAMS)
goto fail;
if (!ctx->pipes_enabled_per_bam || info[i].pipes_suspended)
goto fail;
pr_err("%s: dump usb bam registers here in call back!\n",
__func__);
sps_get_bam_debug_info(ctx->h_bam, 93,
(SPS_BAM_PIPE(0) | SPS_BAM_PIPE(1)), 0, 2);
fail:
return NOTIFY_DONE;
}
static struct notifier_block usb_bam_panic_blk = {
.notifier_call = usb_bam_panic_notifier,
};
void usb_bam_register_panic_hdlr(void)
{
atomic_notifier_chain_register(&panic_notifier_list,
&usb_bam_panic_blk);
}
static int usb_bam_probe(struct platform_device *pdev)
{
int ret, i, irq;
struct resource *io_res;
void __iomem *regs;
enum usb_ctrl bam_type;
struct usb_bam_ctx_type *ctx;
struct msm_usb_bam_platform_data *pdata;
dev_dbg(&pdev->dev, "usb_bam_probe\n");
ret = device_create_file(&pdev->dev, &dev_attr_inactivity_timer);
if (ret) {
dev_err(&pdev->dev, "failed to create fs node\n");
return ret;
}
io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!io_res) {
dev_err(&pdev->dev, "missing BAM memory resource\n");
return -ENODEV;
}
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "Unable to get IRQ resource\n");
return irq;
}
regs = devm_ioremap(&pdev->dev, io_res->start, resource_size(io_res));
if (!regs) {
log_event_err("%s: ioremap failed\n", __func__);
return -ENOMEM;
}
/* specify BAM physical address to be filled in BAM connections */
pdata = usb_bam_dt_to_pdata(pdev, io_res->start);
if (!pdata)
return -EINVAL;
pdev->dev.platform_data = pdata;
bam_type = pdata->bam_type;
ctx = &msm_usb_bam[bam_type];
ctx->usb_bam_pdev = pdev;
ctx->irq = irq;
ctx->regs = regs;
ctx->io_res = io_res;
for (i = 0; i < ctx->max_connections; i++) {
ctx->usb_bam_connections[i].enabled = 0;
INIT_WORK(&ctx->usb_bam_connections[i].event.event_w,
usb_bam_work);
}
init_completion(&info[bam_type].prod_avail);
complete(&info[bam_type].prod_avail);
init_completion(&info[bam_type].prod_released);
complete(&info[bam_type].prod_released);
info[bam_type].cur_prod_state = IPA_RM_RESOURCE_RELEASED;
info[bam_type].cur_cons_state = IPA_RM_RESOURCE_RELEASED;
info[bam_type].bam_type = bam_type;
INIT_WORK(&info[bam_type].resume_work, usb_bam_finish_resume);
INIT_WORK(&info[bam_type].finish_suspend_work, usb_bam_finish_suspend_);
mutex_init(&info[bam_type].suspend_resume_mutex);
ctx->usb_bam_wq = alloc_workqueue("usb_bam_wq",
WQ_UNBOUND | WQ_MEM_RECLAIM, 1);
if (!ctx->usb_bam_wq) {
log_event_err("unable to create workqueue usb_bam_wq\n");
return -ENOMEM;
}
ret = enable_usb_bam(pdev);
if (ret) {
destroy_workqueue(ctx->usb_bam_wq);
return ret;
}
pm_runtime_no_callbacks(&pdev->dev);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
spin_lock_init(&usb_bam_ipa_handshake_info_lock);
if (ipa_get_transport_type() == IPA_TRANSPORT_TYPE_SPS &&
ipa_is_ready())
usb_bam_ipa_create_resources(bam_type);
spin_lock_init(&ctx->usb_bam_lock);
usb_bam_register_panic_hdlr();
return ret;
}
bool usb_bam_get_prod_granted(enum usb_ctrl bam_type, u8 idx)
{
return (info[bam_type].cur_prod_state == IPA_RM_RESOURCE_GRANTED);
}
EXPORT_SYMBOL(usb_bam_get_prod_granted);
int get_bam2bam_connection_info(enum usb_ctrl bam_type, u8 idx,
unsigned long *usb_bam_handle, u32 *usb_bam_pipe_idx,
u32 *peer_pipe_idx, struct sps_mem_buffer *desc_fifo,
struct sps_mem_buffer *data_fifo, enum usb_pipe_mem_type *mem_type)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
struct usb_bam_pipe_connect *pipe_connect =
&ctx->usb_bam_connections[idx];
enum usb_bam_pipe_dir dir = pipe_connect->dir;
struct sps_connect *sps_connection =
&ctx->usb_bam_sps.sps_connections[idx];
if (dir == USB_TO_PEER_PERIPHERAL) {
*usb_bam_handle = sps_connection->source;
*usb_bam_pipe_idx = sps_connection->src_pipe_index;
*peer_pipe_idx = sps_connection->dest_pipe_index;
} else {
*usb_bam_handle = sps_connection->destination;
*usb_bam_pipe_idx = sps_connection->dest_pipe_index;
*peer_pipe_idx = sps_connection->src_pipe_index;
}
if (data_fifo)
memcpy(data_fifo, &pipe_connect->data_mem_buf,
sizeof(struct sps_mem_buffer));
if (desc_fifo)
memcpy(desc_fifo, &pipe_connect->desc_mem_buf,
sizeof(struct sps_mem_buffer));
if (mem_type)
*mem_type = pipe_connect->mem_type;
return 0;
}
EXPORT_SYMBOL(get_bam2bam_connection_info);
int get_qdss_bam_connection_info(unsigned long *usb_bam_handle,
u32 *usb_bam_pipe_idx, u32 *peer_pipe_idx,
struct sps_mem_buffer *desc_fifo, struct sps_mem_buffer *data_fifo,
enum usb_pipe_mem_type *mem_type)
{
u8 idx;
/* QDSS uses only one pipe */
idx = usb_bam_get_connection_idx(qdss_usb_bam_type, QDSS_P_BAM,
PEER_PERIPHERAL_TO_USB, USB_BAM_DEVICE, 0);
get_bam2bam_connection_info(qdss_usb_bam_type, idx, usb_bam_handle,
usb_bam_pipe_idx, peer_pipe_idx,
desc_fifo, data_fifo, mem_type);
return 0;
}
EXPORT_SYMBOL(get_qdss_bam_connection_info);
int usb_bam_get_connection_idx(enum usb_ctrl bam_type, enum peer_bam client,
enum usb_bam_pipe_dir dir, enum usb_bam_mode bam_mode, u32 num)
{
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
u8 i;
for (i = 0; i < ctx->max_connections; i++) {
if (ctx->usb_bam_connections[i].peer_bam == client &&
ctx->usb_bam_connections[i].dir == dir &&
ctx->usb_bam_connections[i].bam_mode == bam_mode &&
ctx->usb_bam_connections[i].pipe_num == num) {
log_event_dbg("%s: index %d was found\n", __func__, i);
return i;
}
}
log_event_err("%s: failed for %d\n", __func__, bam_type);
return -ENODEV;
}
EXPORT_SYMBOL(usb_bam_get_connection_idx);
int usb_bam_get_bam_type(const char *core_name)
{
int bam_type = get_bam_type_from_core_name(core_name);
if (bam_type < 0 || bam_type >= MAX_BAMS) {
log_event_err("%s: Invalid bam, type=%d, name=%s\n",
__func__, bam_type, core_name);
return -EINVAL;
}
return bam_type;
}
EXPORT_SYMBOL(usb_bam_get_bam_type);
bool msm_usb_bam_enable(enum usb_ctrl bam, bool bam_enable)
{
struct msm_usb_bam_platform_data *pdata;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam];
if (!ctx->usb_bam_pdev)
return 0;
pdata = ctx->usb_bam_pdev->dev.platform_data;
if ((bam != CI_CTRL) || !(bam_enable ||
pdata->enable_hsusb_bam_on_boot))
return 0;
msm_hw_bam_disable(1);
sps_device_reset(ctx->h_bam);
msm_hw_bam_disable(0);
return 0;
}
EXPORT_SYMBOL(msm_usb_bam_enable);
/**
* msm_bam_hsic_host_pipe_empty - Check all HSIC host BAM pipe state
*
* return true if all BAM pipe used for HSIC Host mode is empty.
*/
bool msm_bam_hsic_host_pipe_empty(void)
{
struct usb_bam_pipe_connect *pipe_connect;
struct sps_pipe *pipe = NULL;
enum usb_ctrl bam = HSIC_CTRL;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam];
int i, ret;
u32 status;
pr_debug("%s: enter\n", __func__);
for (i = 0; i < ctx->max_connections; i++) {
pipe_connect = &ctx->usb_bam_connections[i];
if (pipe_connect->enabled) {
pipe = ctx->usb_bam_sps.sps_pipes[i];
ret = sps_is_pipe_empty(pipe, &status);
if (ret) {
log_event_err("%s(): sps_is_pipe_empty() failed\n",
__func__);
log_event_err("%s(): SRC index(%d), DEST index(%d):\n",
__func__,
pipe_connect->src_pipe_index,
pipe_connect->dst_pipe_index);
WARN_ON(1);
}
if (!status) {
log_event_err("%s(): pipe is not empty.\n",
__func__);
log_event_err("%s(): SRC index(%d), DEST index(%d):\n",
__func__,
pipe_connect->src_pipe_index,
pipe_connect->dst_pipe_index);
return false;
} else {
pr_debug("%s(): SRC index(%d), DEST index(%d):\n",
__func__,
pipe_connect->src_pipe_index,
pipe_connect->dst_pipe_index);
}
}
}
if (!pipe)
log_event_err("%s: Bam %s has no connected pipes\n", __func__,
bam_enable_strings[bam]);
return true;
}
EXPORT_SYMBOL(msm_bam_hsic_host_pipe_empty);
bool msm_bam_hsic_lpm_ok(void)
{
log_event_dbg("%s: enter\n", __func__);
if (info[HSIC_CTRL].cur_bam_mode == USB_BAM_HOST)
return msm_bam_host_lpm_ok(HSIC_CTRL);
/* RuntimPM is used to manage device mode LPM */
return 0;
}
EXPORT_SYMBOL(msm_bam_hsic_lpm_ok);
static int usb_bam_remove(struct platform_device *pdev)
{
struct msm_usb_bam_platform_data *pdata = pdev->dev.platform_data;
enum usb_ctrl bam_type = pdata->bam_type;
struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];
destroy_workqueue(ctx->usb_bam_wq);
return 0;
}
static const struct of_device_id usb_bam_dt_match[] = {
{ .compatible = "qcom,usb-bam-msm",
},
{}
};
MODULE_DEVICE_TABLE(of, usb_bam_dt_match);
static struct platform_driver usb_bam_driver = {
.probe = usb_bam_probe,
.remove = usb_bam_remove,
.driver = {
.name = "usb_bam",
.of_match_table = usb_bam_dt_match,
},
};
static int __init init(void)
{
return platform_driver_register(&usb_bam_driver);
}
module_init(init);
static void __exit cleanup(void)
{
platform_driver_unregister(&usb_bam_driver);
}
module_exit(cleanup);
MODULE_DESCRIPTION("MSM USB BAM DRIVER");
MODULE_LICENSE("GPL v2");
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