+++ /dev/null
-/* 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,
- },
-};
-
-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");
projects / firefly-linux-kernel-4.4.55.git / blobdiff