![Wolfram Sang](/assets/img/avatar_default.png)
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
1035 lines
21 KiB
C
1035 lines
21 KiB
C
/* arch/arm/mach-msm/smd.c
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*
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* Copyright (C) 2007 Google, Inc.
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* Author: Brian Swetland <swetland@google.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/platform_device.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/cdev.h>
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#include <linux/device.h>
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#include <linux/wait.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/debugfs.h>
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#include <linux/delay.h>
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#include <mach/msm_smd.h>
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#include "smd_private.h"
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#include "proc_comm.h"
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#if defined(CONFIG_ARCH_QSD8X50)
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#define CONFIG_QDSP6 1
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#endif
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#define MODULE_NAME "msm_smd"
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enum {
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MSM_SMD_DEBUG = 1U << 0,
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MSM_SMSM_DEBUG = 1U << 0,
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};
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static int msm_smd_debug_mask;
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struct shared_info {
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int ready;
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void __iomem *state;
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};
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static unsigned dummy_state[SMSM_STATE_COUNT];
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static struct shared_info smd_info = {
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/* FIXME: not a real __iomem pointer */
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.state = &dummy_state,
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};
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module_param_named(debug_mask, msm_smd_debug_mask,
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int, S_IRUGO | S_IWUSR | S_IWGRP);
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static unsigned last_heap_free = 0xffffffff;
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static inline void notify_other_smsm(void)
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{
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msm_a2m_int(5);
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#ifdef CONFIG_QDSP6
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msm_a2m_int(8);
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#endif
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}
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static inline void notify_modem_smd(void)
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{
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msm_a2m_int(0);
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}
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static inline void notify_dsp_smd(void)
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{
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msm_a2m_int(8);
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}
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static void smd_diag(void)
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{
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char *x;
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x = smem_find(ID_DIAG_ERR_MSG, SZ_DIAG_ERR_MSG);
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if (x != 0) {
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x[SZ_DIAG_ERR_MSG - 1] = 0;
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pr_debug("DIAG '%s'\n", x);
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}
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}
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/* call when SMSM_RESET flag is set in the A9's smsm_state */
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static void handle_modem_crash(void)
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{
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pr_err("ARM9 has CRASHED\n");
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smd_diag();
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/* in this case the modem or watchdog should reboot us */
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for (;;)
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;
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}
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uint32_t raw_smsm_get_state(enum smsm_state_item item)
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{
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return readl(smd_info.state + item * 4);
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}
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static int check_for_modem_crash(void)
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{
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if (raw_smsm_get_state(SMSM_STATE_MODEM) & SMSM_RESET) {
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handle_modem_crash();
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return -1;
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}
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return 0;
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}
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/* the spinlock is used to synchronize between the
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* irq handler and code that mutates the channel
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* list or fiddles with channel state
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*/
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DEFINE_SPINLOCK(smd_lock);
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DEFINE_SPINLOCK(smem_lock);
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/* the mutex is used during open() and close()
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* operations to avoid races while creating or
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* destroying smd_channel structures
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*/
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static DEFINE_MUTEX(smd_creation_mutex);
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static int smd_initialized;
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LIST_HEAD(smd_ch_closed_list);
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LIST_HEAD(smd_ch_list_modem);
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LIST_HEAD(smd_ch_list_dsp);
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static unsigned char smd_ch_allocated[64];
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static struct work_struct probe_work;
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/* how many bytes are available for reading */
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static int smd_stream_read_avail(struct smd_channel *ch)
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{
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return (ch->recv->head - ch->recv->tail) & ch->fifo_mask;
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}
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/* how many bytes we are free to write */
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static int smd_stream_write_avail(struct smd_channel *ch)
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{
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return ch->fifo_mask -
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((ch->send->head - ch->send->tail) & ch->fifo_mask);
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}
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static int smd_packet_read_avail(struct smd_channel *ch)
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{
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if (ch->current_packet) {
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int n = smd_stream_read_avail(ch);
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if (n > ch->current_packet)
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n = ch->current_packet;
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return n;
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} else {
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return 0;
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}
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}
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static int smd_packet_write_avail(struct smd_channel *ch)
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{
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int n = smd_stream_write_avail(ch);
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return n > SMD_HEADER_SIZE ? n - SMD_HEADER_SIZE : 0;
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}
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static int ch_is_open(struct smd_channel *ch)
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{
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return (ch->recv->state == SMD_SS_OPENED) &&
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(ch->send->state == SMD_SS_OPENED);
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}
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/* provide a pointer and length to readable data in the fifo */
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static unsigned ch_read_buffer(struct smd_channel *ch, void **ptr)
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{
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unsigned head = ch->recv->head;
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unsigned tail = ch->recv->tail;
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*ptr = (void *) (ch->recv_data + tail);
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if (tail <= head)
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return head - tail;
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else
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return ch->fifo_size - tail;
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}
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/* advance the fifo read pointer after data from ch_read_buffer is consumed */
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static void ch_read_done(struct smd_channel *ch, unsigned count)
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{
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BUG_ON(count > smd_stream_read_avail(ch));
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ch->recv->tail = (ch->recv->tail + count) & ch->fifo_mask;
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ch->send->fTAIL = 1;
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}
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/* basic read interface to ch_read_{buffer,done} used
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* by smd_*_read() and update_packet_state()
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* will read-and-discard if the _data pointer is null
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*/
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static int ch_read(struct smd_channel *ch, void *_data, int len)
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{
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void *ptr;
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unsigned n;
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unsigned char *data = _data;
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int orig_len = len;
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while (len > 0) {
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n = ch_read_buffer(ch, &ptr);
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if (n == 0)
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break;
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if (n > len)
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n = len;
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if (_data)
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memcpy(data, ptr, n);
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data += n;
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len -= n;
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ch_read_done(ch, n);
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}
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return orig_len - len;
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}
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static void update_stream_state(struct smd_channel *ch)
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{
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/* streams have no special state requiring updating */
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}
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static void update_packet_state(struct smd_channel *ch)
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{
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unsigned hdr[5];
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int r;
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/* can't do anything if we're in the middle of a packet */
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if (ch->current_packet != 0)
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return;
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/* don't bother unless we can get the full header */
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if (smd_stream_read_avail(ch) < SMD_HEADER_SIZE)
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return;
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r = ch_read(ch, hdr, SMD_HEADER_SIZE);
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BUG_ON(r != SMD_HEADER_SIZE);
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ch->current_packet = hdr[0];
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}
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/* provide a pointer and length to next free space in the fifo */
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static unsigned ch_write_buffer(struct smd_channel *ch, void **ptr)
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{
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unsigned head = ch->send->head;
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unsigned tail = ch->send->tail;
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*ptr = (void *) (ch->send_data + head);
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if (head < tail) {
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return tail - head - 1;
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} else {
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if (tail == 0)
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return ch->fifo_size - head - 1;
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else
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return ch->fifo_size - head;
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}
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}
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/* advace the fifo write pointer after freespace
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* from ch_write_buffer is filled
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*/
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static void ch_write_done(struct smd_channel *ch, unsigned count)
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{
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BUG_ON(count > smd_stream_write_avail(ch));
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ch->send->head = (ch->send->head + count) & ch->fifo_mask;
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ch->send->fHEAD = 1;
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}
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static void ch_set_state(struct smd_channel *ch, unsigned n)
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{
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if (n == SMD_SS_OPENED) {
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ch->send->fDSR = 1;
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ch->send->fCTS = 1;
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ch->send->fCD = 1;
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} else {
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ch->send->fDSR = 0;
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ch->send->fCTS = 0;
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ch->send->fCD = 0;
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}
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ch->send->state = n;
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ch->send->fSTATE = 1;
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ch->notify_other_cpu();
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}
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static void do_smd_probe(void)
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{
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struct smem_shared *shared = (void *) MSM_SHARED_RAM_BASE;
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if (shared->heap_info.free_offset != last_heap_free) {
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last_heap_free = shared->heap_info.free_offset;
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schedule_work(&probe_work);
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}
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}
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static void smd_state_change(struct smd_channel *ch,
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unsigned last, unsigned next)
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{
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ch->last_state = next;
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pr_debug("ch %d %d -> %d\n", ch->n, last, next);
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switch (next) {
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case SMD_SS_OPENING:
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ch->recv->tail = 0;
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case SMD_SS_OPENED:
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if (ch->send->state != SMD_SS_OPENED)
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ch_set_state(ch, SMD_SS_OPENED);
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ch->notify(ch->priv, SMD_EVENT_OPEN);
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break;
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case SMD_SS_FLUSHING:
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case SMD_SS_RESET:
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/* we should force them to close? */
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default:
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ch->notify(ch->priv, SMD_EVENT_CLOSE);
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}
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}
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static void handle_smd_irq(struct list_head *list, void (*notify)(void))
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{
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unsigned long flags;
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struct smd_channel *ch;
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int do_notify = 0;
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unsigned ch_flags;
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unsigned tmp;
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spin_lock_irqsave(&smd_lock, flags);
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list_for_each_entry(ch, list, ch_list) {
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ch_flags = 0;
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if (ch_is_open(ch)) {
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if (ch->recv->fHEAD) {
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ch->recv->fHEAD = 0;
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ch_flags |= 1;
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do_notify |= 1;
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}
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if (ch->recv->fTAIL) {
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ch->recv->fTAIL = 0;
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ch_flags |= 2;
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do_notify |= 1;
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}
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if (ch->recv->fSTATE) {
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ch->recv->fSTATE = 0;
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ch_flags |= 4;
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do_notify |= 1;
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}
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}
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tmp = ch->recv->state;
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if (tmp != ch->last_state)
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smd_state_change(ch, ch->last_state, tmp);
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if (ch_flags) {
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ch->update_state(ch);
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ch->notify(ch->priv, SMD_EVENT_DATA);
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}
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}
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if (do_notify)
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notify();
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spin_unlock_irqrestore(&smd_lock, flags);
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do_smd_probe();
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}
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static irqreturn_t smd_modem_irq_handler(int irq, void *data)
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{
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handle_smd_irq(&smd_ch_list_modem, notify_modem_smd);
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return IRQ_HANDLED;
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}
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#if defined(CONFIG_QDSP6)
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static irqreturn_t smd_dsp_irq_handler(int irq, void *data)
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{
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handle_smd_irq(&smd_ch_list_dsp, notify_dsp_smd);
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return IRQ_HANDLED;
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}
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#endif
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static void smd_fake_irq_handler(unsigned long arg)
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{
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handle_smd_irq(&smd_ch_list_modem, notify_modem_smd);
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handle_smd_irq(&smd_ch_list_dsp, notify_dsp_smd);
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}
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static DECLARE_TASKLET(smd_fake_irq_tasklet, smd_fake_irq_handler, 0);
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static inline int smd_need_int(struct smd_channel *ch)
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{
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if (ch_is_open(ch)) {
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if (ch->recv->fHEAD || ch->recv->fTAIL || ch->recv->fSTATE)
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return 1;
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if (ch->recv->state != ch->last_state)
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return 1;
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}
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return 0;
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}
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void smd_sleep_exit(void)
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{
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unsigned long flags;
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struct smd_channel *ch;
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int need_int = 0;
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spin_lock_irqsave(&smd_lock, flags);
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list_for_each_entry(ch, &smd_ch_list_modem, ch_list) {
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if (smd_need_int(ch)) {
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need_int = 1;
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break;
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}
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}
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list_for_each_entry(ch, &smd_ch_list_dsp, ch_list) {
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if (smd_need_int(ch)) {
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need_int = 1;
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break;
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}
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}
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spin_unlock_irqrestore(&smd_lock, flags);
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do_smd_probe();
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if (need_int) {
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if (msm_smd_debug_mask & MSM_SMD_DEBUG)
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pr_info("smd_sleep_exit need interrupt\n");
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tasklet_schedule(&smd_fake_irq_tasklet);
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}
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}
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void smd_kick(smd_channel_t *ch)
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{
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unsigned long flags;
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unsigned tmp;
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spin_lock_irqsave(&smd_lock, flags);
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ch->update_state(ch);
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tmp = ch->recv->state;
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if (tmp != ch->last_state) {
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ch->last_state = tmp;
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if (tmp == SMD_SS_OPENED)
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ch->notify(ch->priv, SMD_EVENT_OPEN);
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else
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ch->notify(ch->priv, SMD_EVENT_CLOSE);
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}
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ch->notify(ch->priv, SMD_EVENT_DATA);
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ch->notify_other_cpu();
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spin_unlock_irqrestore(&smd_lock, flags);
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}
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static int smd_is_packet(int chn, unsigned type)
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{
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type &= SMD_KIND_MASK;
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if (type == SMD_KIND_PACKET)
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return 1;
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if (type == SMD_KIND_STREAM)
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return 0;
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/* older AMSS reports SMD_KIND_UNKNOWN always */
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if ((chn > 4) || (chn == 1))
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return 1;
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else
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return 0;
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}
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static int smd_stream_write(smd_channel_t *ch, const void *_data, int len)
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{
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void *ptr;
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const unsigned char *buf = _data;
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unsigned xfer;
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int orig_len = len;
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if (len < 0)
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return -EINVAL;
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while ((xfer = ch_write_buffer(ch, &ptr)) != 0) {
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if (!ch_is_open(ch))
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break;
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if (xfer > len)
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xfer = len;
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memcpy(ptr, buf, xfer);
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ch_write_done(ch, xfer);
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len -= xfer;
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buf += xfer;
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if (len == 0)
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break;
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}
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ch->notify_other_cpu();
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return orig_len - len;
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}
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static int smd_packet_write(smd_channel_t *ch, const void *_data, int len)
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{
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unsigned hdr[5];
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if (len < 0)
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return -EINVAL;
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if (smd_stream_write_avail(ch) < (len + SMD_HEADER_SIZE))
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return -ENOMEM;
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hdr[0] = len;
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hdr[1] = hdr[2] = hdr[3] = hdr[4] = 0;
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smd_stream_write(ch, hdr, sizeof(hdr));
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smd_stream_write(ch, _data, len);
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return len;
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}
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static int smd_stream_read(smd_channel_t *ch, void *data, int len)
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{
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int r;
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if (len < 0)
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return -EINVAL;
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r = ch_read(ch, data, len);
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if (r > 0)
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ch->notify_other_cpu();
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return r;
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}
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static int smd_packet_read(smd_channel_t *ch, void *data, int len)
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{
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unsigned long flags;
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int r;
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if (len < 0)
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return -EINVAL;
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if (len > ch->current_packet)
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len = ch->current_packet;
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r = ch_read(ch, data, len);
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if (r > 0)
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ch->notify_other_cpu();
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|
|
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");
|