zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/arch/arm/mach-msm/smd.c b/ap/os/linux/linux-3.4.x/arch/arm/mach-msm/smd.c
new file mode 100644
index 0000000..657be73
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/arch/arm/mach-msm/smd.c
@@ -0,0 +1,1041 @@
+/* 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 <mach/system.h>
+
+#include "smd_private.h"
+#include "proc_comm.h"
+
+#if defined(CONFIG_ARCH_QSD8X50)
+#define CONFIG_QDSP6 1
+#endif
+
+void (*msm_hw_reset_hook)(void);
+
+#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;
+ unsigned state;
+};
+
+static unsigned dummy_state[SMSM_STATE_COUNT];
+
+static struct shared_info smd_info = {
+ .state = (unsigned) &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();
+
+ /* hard reboot if possible */
+ if (msm_hw_reset_hook)
+ msm_hw_reset_hook();
+
+ /* 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 *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 0;
+
+ if (toc[id].allocated) {
+ *size = toc[id].size;
+ return (void *) (MSM_SHARED_RAM_BASE + toc[id].offset);
+ } else {
+ *size = 0;
+ }
+
+ return 0;
+}
+
+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)
+{
+ unsigned long 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 *state;
+ state = smem_item(SMEM_SMSM_SHARED_STATE, &size);
+ if (size == SMSM_V1_SIZE || size == SMSM_V2_SIZE) {
+ smd_info.state = (unsigned)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 __devinit 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");