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acrn-kernel/arch/arm/mach-msm/smd.c

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/* arch/arm/mach-msm/smd.c
*
* Copyright (C) 2007 Google, Inc.
* Author: Brian Swetland <swetland@google.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/cdev.h>
#include <linux/device.h>
#include <linux/wait.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <mach/msm_smd.h>
#include "smd_private.h"
#include "proc_comm.h"
#if defined(CONFIG_ARCH_QSD8X50)
#define CONFIG_QDSP6 1
#endif
#define MODULE_NAME "msm_smd"
enum {
MSM_SMD_DEBUG = 1U << 0,
MSM_SMSM_DEBUG = 1U << 0,
};
static int msm_smd_debug_mask;
struct shared_info {
int ready;
void __iomem *state;
};
static unsigned dummy_state[SMSM_STATE_COUNT];
static struct shared_info smd_info = {
/* FIXME: not a real __iomem pointer */
.state = &dummy_state,
};
module_param_named(debug_mask, msm_smd_debug_mask,
int, S_IRUGO | S_IWUSR | S_IWGRP);
static unsigned last_heap_free = 0xffffffff;
static inline void notify_other_smsm(void)
{
msm_a2m_int(5);
#ifdef CONFIG_QDSP6
msm_a2m_int(8);
#endif
}
static inline void notify_modem_smd(void)
{
msm_a2m_int(0);
}
static inline void notify_dsp_smd(void)
{
msm_a2m_int(8);
}
static void smd_diag(void)
{
char *x;
x = smem_find(ID_DIAG_ERR_MSG, SZ_DIAG_ERR_MSG);
if (x != 0) {
x[SZ_DIAG_ERR_MSG - 1] = 0;
pr_debug("DIAG '%s'\n", x);
}
}
/* call when SMSM_RESET flag is set in the A9's smsm_state */
static void handle_modem_crash(void)
{
pr_err("ARM9 has CRASHED\n");
smd_diag();
/* in this case the modem or watchdog should reboot us */
for (;;)
;
}
uint32_t raw_smsm_get_state(enum smsm_state_item item)
{
return readl(smd_info.state + item * 4);
}
static int check_for_modem_crash(void)
{
if (raw_smsm_get_state(SMSM_STATE_MODEM) & SMSM_RESET) {
handle_modem_crash();
return -1;
}
return 0;
}
/* the spinlock is used to synchronize between the
* irq handler and code that mutates the channel
* list or fiddles with channel state
*/
DEFINE_SPINLOCK(smd_lock);
DEFINE_SPINLOCK(smem_lock);
/* the mutex is used during open() and close()
* operations to avoid races while creating or
* destroying smd_channel structures
*/
static DEFINE_MUTEX(smd_creation_mutex);
static int smd_initialized;
LIST_HEAD(smd_ch_closed_list);
LIST_HEAD(smd_ch_list_modem);
LIST_HEAD(smd_ch_list_dsp);
static unsigned char smd_ch_allocated[64];
static struct work_struct probe_work;
/* how many bytes are available for reading */
static int smd_stream_read_avail(struct smd_channel *ch)
{
return (ch->recv->head - ch->recv->tail) & ch->fifo_mask;
}
/* how many bytes we are free to write */
static int smd_stream_write_avail(struct smd_channel *ch)
{
return ch->fifo_mask -
((ch->send->head - ch->send->tail) & ch->fifo_mask);
}
static int smd_packet_read_avail(struct smd_channel *ch)
{
if (ch->current_packet) {
int n = smd_stream_read_avail(ch);
if (n > ch->current_packet)
n = ch->current_packet;
return n;
} else {
return 0;
}
}
static int smd_packet_write_avail(struct smd_channel *ch)
{
int n = smd_stream_write_avail(ch);
return n > SMD_HEADER_SIZE ? n - SMD_HEADER_SIZE : 0;
}
static int ch_is_open(struct smd_channel *ch)
{
return (ch->recv->state == SMD_SS_OPENED) &&
(ch->send->state == SMD_SS_OPENED);
}
/* provide a pointer and length to readable data in the fifo */
static unsigned ch_read_buffer(struct smd_channel *ch, void **ptr)
{
unsigned head = ch->recv->head;
unsigned tail = ch->recv->tail;
*ptr = (void *) (ch->recv_data + tail);
if (tail <= head)
return head - tail;
else
return ch->fifo_size - tail;
}
/* advance the fifo read pointer after data from ch_read_buffer is consumed */
static void ch_read_done(struct smd_channel *ch, unsigned count)
{
BUG_ON(count > smd_stream_read_avail(ch));
ch->recv->tail = (ch->recv->tail + count) & ch->fifo_mask;
ch->send->fTAIL = 1;
}
/* basic read interface to ch_read_{buffer,done} used
* by smd_*_read() and update_packet_state()
* will read-and-discard if the _data pointer is null
*/
static int ch_read(struct smd_channel *ch, void *_data, int len)
{
void *ptr;
unsigned n;
unsigned char *data = _data;
int orig_len = len;
while (len > 0) {
n = ch_read_buffer(ch, &ptr);
if (n == 0)
break;
if (n > len)
n = len;
if (_data)
memcpy(data, ptr, n);
data += n;
len -= n;
ch_read_done(ch, n);
}
return orig_len - len;
}
static void update_stream_state(struct smd_channel *ch)
{
/* streams have no special state requiring updating */
}
static void update_packet_state(struct smd_channel *ch)
{
unsigned hdr[5];
int r;
/* can't do anything if we're in the middle of a packet */
if (ch->current_packet != 0)
return;
/* don't bother unless we can get the full header */
if (smd_stream_read_avail(ch) < SMD_HEADER_SIZE)
return;
r = ch_read(ch, hdr, SMD_HEADER_SIZE);
BUG_ON(r != SMD_HEADER_SIZE);
ch->current_packet = hdr[0];
}
/* provide a pointer and length to next free space in the fifo */
static unsigned ch_write_buffer(struct smd_channel *ch, void **ptr)
{
unsigned head = ch->send->head;
unsigned tail = ch->send->tail;
*ptr = (void *) (ch->send_data + head);
if (head < tail) {
return tail - head - 1;
} else {
if (tail == 0)
return ch->fifo_size - head - 1;
else
return ch->fifo_size - head;
}
}
/* advace the fifo write pointer after freespace
* from ch_write_buffer is filled
*/
static void ch_write_done(struct smd_channel *ch, unsigned count)
{
BUG_ON(count > smd_stream_write_avail(ch));
ch->send->head = (ch->send->head + count) & ch->fifo_mask;
ch->send->fHEAD = 1;
}
static void ch_set_state(struct smd_channel *ch, unsigned n)
{
if (n == SMD_SS_OPENED) {
ch->send->fDSR = 1;
ch->send->fCTS = 1;
ch->send->fCD = 1;
} else {
ch->send->fDSR = 0;
ch->send->fCTS = 0;
ch->send->fCD = 0;
}
ch->send->state = n;
ch->send->fSTATE = 1;
ch->notify_other_cpu();
}
static void do_smd_probe(void)
{
struct smem_shared *shared = (void *) MSM_SHARED_RAM_BASE;
if (shared->heap_info.free_offset != last_heap_free) {
last_heap_free = shared->heap_info.free_offset;
schedule_work(&probe_work);
}
}
static void smd_state_change(struct smd_channel *ch,
unsigned last, unsigned next)
{
ch->last_state = next;
pr_debug("ch %d %d -> %d\n", ch->n, last, next);
switch (next) {
case SMD_SS_OPENING:
ch->recv->tail = 0;
case SMD_SS_OPENED:
if (ch->send->state != SMD_SS_OPENED)
ch_set_state(ch, SMD_SS_OPENED);
ch->notify(ch->priv, SMD_EVENT_OPEN);
break;
case SMD_SS_FLUSHING:
case SMD_SS_RESET:
/* we should force them to close? */
default:
ch->notify(ch->priv, SMD_EVENT_CLOSE);
}
}
static void handle_smd_irq(struct list_head *list, void (*notify)(void))
{
unsigned long flags;
struct smd_channel *ch;
int do_notify = 0;
unsigned ch_flags;
unsigned tmp;
spin_lock_irqsave(&smd_lock, flags);
list_for_each_entry(ch, list, ch_list) {
ch_flags = 0;
if (ch_is_open(ch)) {
if (ch->recv->fHEAD) {
ch->recv->fHEAD = 0;
ch_flags |= 1;
do_notify |= 1;
}
if (ch->recv->fTAIL) {
ch->recv->fTAIL = 0;
ch_flags |= 2;
do_notify |= 1;
}
if (ch->recv->fSTATE) {
ch->recv->fSTATE = 0;
ch_flags |= 4;
do_notify |= 1;
}
}
tmp = ch->recv->state;
if (tmp != ch->last_state)
smd_state_change(ch, ch->last_state, tmp);
if (ch_flags) {
ch->update_state(ch);
ch->notify(ch->priv, SMD_EVENT_DATA);
}
}
if (do_notify)
notify();
spin_unlock_irqrestore(&smd_lock, flags);
do_smd_probe();
}
static irqreturn_t smd_modem_irq_handler(int irq, void *data)
{
handle_smd_irq(&smd_ch_list_modem, notify_modem_smd);
return IRQ_HANDLED;
}
#if defined(CONFIG_QDSP6)
static irqreturn_t smd_dsp_irq_handler(int irq, void *data)
{
handle_smd_irq(&smd_ch_list_dsp, notify_dsp_smd);
return IRQ_HANDLED;
}
#endif
static void smd_fake_irq_handler(unsigned long arg)
{
handle_smd_irq(&smd_ch_list_modem, notify_modem_smd);
handle_smd_irq(&smd_ch_list_dsp, notify_dsp_smd);
}
static DECLARE_TASKLET(smd_fake_irq_tasklet, smd_fake_irq_handler, 0);
static inline int smd_need_int(struct smd_channel *ch)
{
if (ch_is_open(ch)) {
if (ch->recv->fHEAD || ch->recv->fTAIL || ch->recv->fSTATE)
return 1;
if (ch->recv->state != ch->last_state)
return 1;
}
return 0;
}
void smd_sleep_exit(void)
{
unsigned long flags;
struct smd_channel *ch;
int need_int = 0;
spin_lock_irqsave(&smd_lock, flags);
list_for_each_entry(ch, &smd_ch_list_modem, ch_list) {
if (smd_need_int(ch)) {
need_int = 1;
break;
}
}
list_for_each_entry(ch, &smd_ch_list_dsp, ch_list) {
if (smd_need_int(ch)) {
need_int = 1;
break;
}
}
spin_unlock_irqrestore(&smd_lock, flags);
do_smd_probe();
if (need_int) {
if (msm_smd_debug_mask & MSM_SMD_DEBUG)
pr_info("smd_sleep_exit need interrupt\n");
tasklet_schedule(&smd_fake_irq_tasklet);
}
}
void smd_kick(smd_channel_t *ch)
{
unsigned long flags;
unsigned tmp;
spin_lock_irqsave(&smd_lock, flags);
ch->update_state(ch);
tmp = ch->recv->state;
if (tmp != ch->last_state) {
ch->last_state = tmp;
if (tmp == SMD_SS_OPENED)
ch->notify(ch->priv, SMD_EVENT_OPEN);
else
ch->notify(ch->priv, SMD_EVENT_CLOSE);
}
ch->notify(ch->priv, SMD_EVENT_DATA);
ch->notify_other_cpu();
spin_unlock_irqrestore(&smd_lock, flags);
}
static int smd_is_packet(int chn, unsigned type)
{
type &= SMD_KIND_MASK;
if (type == SMD_KIND_PACKET)
return 1;
if (type == SMD_KIND_STREAM)
return 0;
/* older AMSS reports SMD_KIND_UNKNOWN always */
if ((chn > 4) || (chn == 1))
return 1;
else
return 0;
}
static int smd_stream_write(smd_channel_t *ch, const void *_data, int len)
{
void *ptr;
const unsigned char *buf = _data;
unsigned xfer;
int orig_len = len;
if (len < 0)
return -EINVAL;
while ((xfer = ch_write_buffer(ch, &ptr)) != 0) {
if (!ch_is_open(ch))
break;
if (xfer > len)
xfer = len;
memcpy(ptr, buf, xfer);
ch_write_done(ch, xfer);
len -= xfer;
buf += xfer;
if (len == 0)
break;
}
ch->notify_other_cpu();
return orig_len - len;
}
static int smd_packet_write(smd_channel_t *ch, const void *_data, int len)
{
unsigned hdr[5];
if (len < 0)
return -EINVAL;
if (smd_stream_write_avail(ch) < (len + SMD_HEADER_SIZE))
return -ENOMEM;
hdr[0] = len;
hdr[1] = hdr[2] = hdr[3] = hdr[4] = 0;
smd_stream_write(ch, hdr, sizeof(hdr));
smd_stream_write(ch, _data, len);
return len;
}
static int smd_stream_read(smd_channel_t *ch, void *data, int len)
{
int r;
if (len < 0)
return -EINVAL;
r = ch_read(ch, data, len);
if (r > 0)
ch->notify_other_cpu();
return r;
}
static int smd_packet_read(smd_channel_t *ch, void *data, int len)
{
unsigned long flags;
int r;
if (len < 0)
return -EINVAL;
if (len > ch->current_packet)
len = ch->current_packet;
r = ch_read(ch, data, len);
if (r > 0)
ch->notify_other_cpu();
spin_lock_irqsave(&smd_lock, flags);
ch->current_packet -= r;
update_packet_state(ch);
spin_unlock_irqrestore(&smd_lock, flags);
return r;
}
static int smd_alloc_channel(const char *name, uint32_t cid, uint32_t type)
{
struct smd_channel *ch;
ch = kzalloc(sizeof(struct smd_channel), GFP_KERNEL);
if (ch == 0) {
pr_err("smd_alloc_channel() out of memory\n");
return -1;
}
ch->n = cid;
if (_smd_alloc_channel(ch)) {
kfree(ch);
return -1;
}
ch->fifo_mask = ch->fifo_size - 1;
ch->type = type;
if ((type & SMD_TYPE_MASK) == SMD_TYPE_APPS_MODEM)
ch->notify_other_cpu = notify_modem_smd;
else
ch->notify_other_cpu = notify_dsp_smd;
if (smd_is_packet(cid, type)) {
ch->read = smd_packet_read;
ch->write = smd_packet_write;
ch->read_avail = smd_packet_read_avail;
ch->write_avail = smd_packet_write_avail;
ch->update_state = update_packet_state;
} else {
ch->read = smd_stream_read;
ch->write = smd_stream_write;
ch->read_avail = smd_stream_read_avail;
ch->write_avail = smd_stream_write_avail;
ch->update_state = update_stream_state;
}
if ((type & 0xff) == 0)
memcpy(ch->name, "SMD_", 4);
else
memcpy(ch->name, "DSP_", 4);
memcpy(ch->name + 4, name, 20);
ch->name[23] = 0;
ch->pdev.name = ch->name;
ch->pdev.id = -1;
pr_debug("smd_alloc_channel() cid=%02d size=%05d '%s'\n",
ch->n, ch->fifo_size, ch->name);
mutex_lock(&smd_creation_mutex);
list_add(&ch->ch_list, &smd_ch_closed_list);
mutex_unlock(&smd_creation_mutex);
platform_device_register(&ch->pdev);
return 0;
}
static void smd_channel_probe_worker(struct work_struct *work)
{
struct smd_alloc_elm *shared;
unsigned ctype;
unsigned type;
unsigned n;
shared = smem_find(ID_CH_ALLOC_TBL, sizeof(*shared) * 64);
if (!shared) {
pr_err("cannot find allocation table\n");
return;
}
for (n = 0; n < 64; n++) {
if (smd_ch_allocated[n])
continue;
if (!shared[n].ref_count)
continue;
if (!shared[n].name[0])
continue;
ctype = shared[n].ctype;
type = ctype & SMD_TYPE_MASK;
/* DAL channels are stream but neither the modem,
* nor the DSP correctly indicate this. Fixup manually.
*/
if (!memcmp(shared[n].name, "DAL", 3))
ctype = (ctype & (~SMD_KIND_MASK)) | SMD_KIND_STREAM;
type = shared[n].ctype & SMD_TYPE_MASK;
if ((type == SMD_TYPE_APPS_MODEM) ||
(type == SMD_TYPE_APPS_DSP))
if (!smd_alloc_channel(shared[n].name, shared[n].cid, ctype))
smd_ch_allocated[n] = 1;
}
}
static void do_nothing_notify(void *priv, unsigned flags)
{
}
struct smd_channel *smd_get_channel(const char *name)
{
struct smd_channel *ch;
mutex_lock(&smd_creation_mutex);
list_for_each_entry(ch, &smd_ch_closed_list, ch_list) {
if (!strcmp(name, ch->name)) {
list_del(&ch->ch_list);
mutex_unlock(&smd_creation_mutex);
return ch;
}
}
mutex_unlock(&smd_creation_mutex);
return NULL;
}
int smd_open(const char *name, smd_channel_t **_ch,
void *priv, void (*notify)(void *, unsigned))
{
struct smd_channel *ch;
unsigned long flags;
if (smd_initialized == 0) {
pr_info("smd_open() before smd_init()\n");
return -ENODEV;
}
ch = smd_get_channel(name);
if (!ch)
return -ENODEV;
if (notify == 0)
notify = do_nothing_notify;
ch->notify = notify;
ch->current_packet = 0;
ch->last_state = SMD_SS_CLOSED;
ch->priv = priv;
*_ch = ch;
spin_lock_irqsave(&smd_lock, flags);
if ((ch->type & SMD_TYPE_MASK) == SMD_TYPE_APPS_MODEM)
list_add(&ch->ch_list, &smd_ch_list_modem);
else
list_add(&ch->ch_list, &smd_ch_list_dsp);
/* If the remote side is CLOSING, we need to get it to
* move to OPENING (which we'll do by moving from CLOSED to
* OPENING) and then get it to move from OPENING to
* OPENED (by doing the same state change ourselves).
*
* Otherwise, it should be OPENING and we can move directly
* to OPENED so that it will follow.
*/
if (ch->recv->state == SMD_SS_CLOSING) {
ch->send->head = 0;
ch_set_state(ch, SMD_SS_OPENING);
} else {
ch_set_state(ch, SMD_SS_OPENED);
}
spin_unlock_irqrestore(&smd_lock, flags);
smd_kick(ch);
return 0;
}
int smd_close(smd_channel_t *ch)
{
unsigned long flags;
if (ch == 0)
return -1;
spin_lock_irqsave(&smd_lock, flags);
ch->notify = do_nothing_notify;
list_del(&ch->ch_list);
ch_set_state(ch, SMD_SS_CLOSED);
spin_unlock_irqrestore(&smd_lock, flags);
mutex_lock(&smd_creation_mutex);
list_add(&ch->ch_list, &smd_ch_closed_list);
mutex_unlock(&smd_creation_mutex);
return 0;
}
int smd_read(smd_channel_t *ch, void *data, int len)
{
return ch->read(ch, data, len);
}
int smd_write(smd_channel_t *ch, const void *data, int len)
{
return ch->write(ch, data, len);
}
int smd_write_atomic(smd_channel_t *ch, const void *data, int len)
{
unsigned long flags;
int res;
spin_lock_irqsave(&smd_lock, flags);
res = ch->write(ch, data, len);
spin_unlock_irqrestore(&smd_lock, flags);
return res;
}
int smd_read_avail(smd_channel_t *ch)
{
return ch->read_avail(ch);
}
int smd_write_avail(smd_channel_t *ch)
{
return ch->write_avail(ch);
}
int smd_wait_until_readable(smd_channel_t *ch, int bytes)
{
return -1;
}
int smd_wait_until_writable(smd_channel_t *ch, int bytes)
{
return -1;
}
int smd_cur_packet_size(smd_channel_t *ch)
{
return ch->current_packet;
}
/* ------------------------------------------------------------------------- */
void *smem_alloc(unsigned id, unsigned size)
{
return smem_find(id, size);
}
void __iomem *smem_item(unsigned id, unsigned *size)
{
struct smem_shared *shared = (void *) MSM_SHARED_RAM_BASE;
struct smem_heap_entry *toc = shared->heap_toc;
if (id >= SMEM_NUM_ITEMS)
return NULL;
if (toc[id].allocated) {
*size = toc[id].size;
return (MSM_SHARED_RAM_BASE + toc[id].offset);
} else {
*size = 0;
}
return NULL;
}
void *smem_find(unsigned id, unsigned size_in)
{
unsigned size;
void *ptr;
ptr = smem_item(id, &size);
if (!ptr)
return 0;
size_in = ALIGN(size_in, 8);
if (size_in != size) {
pr_err("smem_find(%d, %d): wrong size %d\n",
id, size_in, size);
return 0;
}
return ptr;
}
static irqreturn_t smsm_irq_handler(int irq, void *data)
{
unsigned long flags;
unsigned apps, modm;
spin_lock_irqsave(&smem_lock, flags);
apps = raw_smsm_get_state(SMSM_STATE_APPS);
modm = raw_smsm_get_state(SMSM_STATE_MODEM);
if (msm_smd_debug_mask & MSM_SMSM_DEBUG)
pr_info("<SM %08x %08x>\n", apps, modm);
if (modm & SMSM_RESET)
handle_modem_crash();
do_smd_probe();
spin_unlock_irqrestore(&smem_lock, flags);
return IRQ_HANDLED;
}
int smsm_change_state(enum smsm_state_item item,
uint32_t clear_mask, uint32_t set_mask)
{
void __iomem *addr = smd_info.state + item * 4;
unsigned long flags;
unsigned state;
if (!smd_info.ready)
return -EIO;
spin_lock_irqsave(&smem_lock, flags);
if (raw_smsm_get_state(SMSM_STATE_MODEM) & SMSM_RESET)
handle_modem_crash();
state = (readl(addr) & ~clear_mask) | set_mask;
writel(state, addr);
if (msm_smd_debug_mask & MSM_SMSM_DEBUG)
pr_info("smsm_change_state %d %x\n", item, state);
notify_other_smsm();
spin_unlock_irqrestore(&smem_lock, flags);
return 0;
}
uint32_t smsm_get_state(enum smsm_state_item item)
{
unsigned long flags;
uint32_t rv;
spin_lock_irqsave(&smem_lock, flags);
rv = readl(smd_info.state + item * 4);
if (item == SMSM_STATE_MODEM && (rv & SMSM_RESET))
handle_modem_crash();
spin_unlock_irqrestore(&smem_lock, flags);
return rv;
}
#ifdef CONFIG_ARCH_MSM_SCORPION
int smsm_set_sleep_duration(uint32_t delay)
{
struct msm_dem_slave_data *ptr;
ptr = smem_find(SMEM_APPS_DEM_SLAVE_DATA, sizeof(*ptr));
if (ptr == NULL) {
pr_err("smsm_set_sleep_duration <SM NO APPS_DEM_SLAVE_DATA>\n");
return -EIO;
}
if (msm_smd_debug_mask & MSM_SMSM_DEBUG)
pr_info("smsm_set_sleep_duration %d -> %d\n",
ptr->sleep_time, delay);
ptr->sleep_time = delay;
return 0;
}
#else
int smsm_set_sleep_duration(uint32_t delay)
{
uint32_t *ptr;
ptr = smem_find(SMEM_SMSM_SLEEP_DELAY, sizeof(*ptr));
if (ptr == NULL) {
pr_err("smsm_set_sleep_duration <SM NO SLEEP_DELAY>\n");
return -EIO;
}
if (msm_smd_debug_mask & MSM_SMSM_DEBUG)
pr_info("smsm_set_sleep_duration %d -> %d\n",
*ptr, delay);
*ptr = delay;
return 0;
}
#endif
int smd_core_init(void)
{
int r;
/* wait for essential items to be initialized */
for (;;) {
unsigned size;
void __iomem *state;
state = smem_item(SMEM_SMSM_SHARED_STATE, &size);
if (size == SMSM_V1_SIZE || size == SMSM_V2_SIZE) {
smd_info.state = state;
break;
}
}
smd_info.ready = 1;
r = request_irq(INT_A9_M2A_0, smd_modem_irq_handler,
IRQF_TRIGGER_RISING, "smd_dev", 0);
if (r < 0)
return r;
r = enable_irq_wake(INT_A9_M2A_0);
if (r < 0)
pr_err("smd_core_init: enable_irq_wake failed for A9_M2A_0\n");
r = request_irq(INT_A9_M2A_5, smsm_irq_handler,
IRQF_TRIGGER_RISING, "smsm_dev", 0);
if (r < 0) {
free_irq(INT_A9_M2A_0, 0);
return r;
}
r = enable_irq_wake(INT_A9_M2A_5);
if (r < 0)
pr_err("smd_core_init: enable_irq_wake failed for A9_M2A_5\n");
#if defined(CONFIG_QDSP6)
r = request_irq(INT_ADSP_A11, smd_dsp_irq_handler,
IRQF_TRIGGER_RISING, "smd_dsp", 0);
if (r < 0) {
free_irq(INT_A9_M2A_0, 0);
free_irq(INT_A9_M2A_5, 0);
return r;
}
#endif
/* check for any SMD channels that may already exist */
do_smd_probe();
/* indicate that we're up and running */
smsm_change_state(SMSM_STATE_APPS,
~0, SMSM_INIT | SMSM_SMDINIT | SMSM_RPCINIT | SMSM_RUN);
#ifdef CONFIG_ARCH_MSM_SCORPION
smsm_change_state(SMSM_STATE_APPS_DEM, ~0, 0);
#endif
return 0;
}
static int msm_smd_probe(struct platform_device *pdev)
{
/*
* If we haven't waited for the ARM9 to boot up till now,
* then we need to wait here. Otherwise this should just
* return immediately.
*/
proc_comm_boot_wait();
INIT_WORK(&probe_work, smd_channel_probe_worker);
if (smd_core_init()) {
pr_err("smd_core_init() failed\n");
return -1;
}
do_smd_probe();
msm_check_for_modem_crash = check_for_modem_crash;
msm_init_last_radio_log(THIS_MODULE);
smd_initialized = 1;
return 0;
}
static struct platform_driver msm_smd_driver = {
.probe = msm_smd_probe,
.driver = {
.name = MODULE_NAME,
.owner = THIS_MODULE,
},
};
static int __init msm_smd_init(void)
{
return platform_driver_register(&msm_smd_driver);
}
module_init(msm_smd_init);
MODULE_DESCRIPTION("MSM Shared Memory Core");
MODULE_AUTHOR("Brian Swetland <swetland@google.com>");
MODULE_LICENSE("GPL");
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