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rtc: Add MSM RTC driver

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Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Stephen Boyd 2013-01-17 19:03:33 -08:00
parent 6b6a72adc0
commit 3668c403db
5 changed files with 877 additions and 1 deletions
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24
drivers/rtc/Kconfig
View file

@ -728,6 +728,30 @@ config RTC_DRV_NUC900
comment "on-CPU RTC drivers"
config RTC_DRV_MSM
tristate "RTC on Qualcomm Chipsets"
depends on ARCH_MSM
default y
help
RTC driver for Qualcomm chipsets
config RTC_SECURE_TIME_SUPPORT
bool "Support for secure time on Qualcomm Chipsets"
depends on RTC_DRV_MSM = y
default y
help
Say yes here to have additional handle for reading secure time
maintained by ARM9.
config RTC_ASYNC_MODEM_SUPPORT
bool "Support for time update on async modem boot"
depends on RTC_DRV_MSM && (ARCH_MSM8X60 || ARCH_QSD8X50)
default n
help
Say yes here to have the system time updated if there is
an asynchronous MODEM boot.
config RTC_DRV_DAVINCI
tristate "TI DaVinci RTC"
depends on ARCH_DAVINCI_DM365

1
drivers/rtc/Makefile
View file

@ -67,6 +67,7 @@ obj-$(CONFIG_RTC_DRV_MAX8925) += rtc-max8925.o
obj-$(CONFIG_RTC_DRV_MAX8998) += rtc-max8998.o
obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
obj-$(CONFIG_RTC_DRV_MC13XXX) += rtc-mc13xxx.o
obj-$(CONFIG_RTC_DRV_MSM) += rtc-msm.o
obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o
obj-$(CONFIG_RTC_DRV_MPC5121) += rtc-mpc5121.o
obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o

2
drivers/rtc/hctosys.c
View file

@ -24,7 +24,7 @@
int rtc_hctosys_ret = -ENODEV;
static int __init rtc_hctosys(void)
int rtc_hctosys(void)
{
int err = -ENODEV;
struct rtc_time tm;

819
drivers/rtc/rtc-msm.c Normal file
View file

@ -0,0 +1,819 @@
/*
* Copyright (C) 2008 Google, Inc.
* Copyright (c) 2009-2011 Code Aurora Forum. All rights reserved.
* Author: San Mehat <san@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.
*
*/
#include <linux/module.h>
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/android_alarm.h>
#include <linux/rtc.h>
#include <linux/rtc-msm.h>
#include <linux/msm_rpcrouter.h>
#include <mach/msm_rpcrouter.h>
#define APP_TIMEREMOTE_PDEV_NAME "rs00000000"
#define TIMEREMOTE_PROCEEDURE_SET_JULIAN 6
#define TIMEREMOTE_PROCEEDURE_GET_JULIAN 7
#ifdef CONFIG_RTC_SECURE_TIME_SUPPORT
#define TIMEREMOTE_PROCEEDURE_GET_SECURE_JULIAN 11
#define TIMEREMOTE_PROCEEDURE_SET_SECURE_JULIAN 16
#endif
#define TIMEREMOTE_PROG_NUMBER 0x30000048
#define TIMEREMOTE_PROG_VER_1 0x00010001
#define TIMEREMOTE_PROG_VER_2 0x00040001
#define RTC_REQUEST_CB_PROC 0x17
#define RTC_CLIENT_INIT_PROC 0x12
#define RTC_EVENT_CB_PROC 0x1
#define RTC_CB_ID 0x1
/* Client request errors */
enum rtc_rpc_err {
ERR_NONE,
ERR_CLIENT_ID_PTR, /* Invalid client ID pointer */
ERR_CLIENT_TYPE, /* Invalid client type */
ERR_CLIENT_ID, /* Invalid client ID */
ERR_TASK_NOT_READY, /* task is not ready for clients */
ERR_INVALID_PROCESSOR, /* Invalid processor id */
ERR_UNSUPPORTED, /* Unsupported request */
ERR_GENERAL, /* Any General Error */
ERR_RPC, /* Any ONCRPC Error */
ERR_ALREADY_REG, /* Client already registered */
ERR_MAX
};
enum processor_type {
CLIENT_PROCESSOR_NONE = 0,
CLIENT_PROCESSOR_MODEM,
CLIENT_PROCESSOR_APP1,
CLIENT_PROCESSOR_APP2,
CLIENT_PROCESSOR_MAX
};
/* Client types */
enum client_type {
CLIENT_TYPE_GEN1 = 0,
CLIENT_FLOATING1,
CLIENT_FLOATING2,
CLIENT_TYPE_INTERNAL,
CLIENT_TYPE_GENOFF_UPDATE,
CLIENT_TYPE_MAX
};
/* Event types */
enum event_type {
EVENT_TOD_CHANGE = 0,
EVENT_GENOFF_CHANGE,
EVENT_MAX
};
struct tod_update_info {
uint32_t tick;
uint64_t stamp;
uint32_t freq;
};
enum time_bases_info {
TIME_RTC = 0,
TIME_TOD,
TIME_USER,
TIME_SECURE,
TIME_INVALID
};
struct genoff_update_info {
enum time_bases_info time_base;
uint64_t offset;
};
union cb_info {
struct tod_update_info tod_update;
struct genoff_update_info genoff_update;
};
struct rtc_cb_recv {
uint32_t client_cb_id;
enum event_type event;
uint32_t cb_info_ptr;
union cb_info cb_info_data;
};
struct msm_rtc {
int proc;
struct msm_rpc_client *rpc_client;
u8 client_id;
struct rtc_device *rtc;
#ifdef CONFIG_RTC_SECURE_TIME_SUPPORT
struct rtc_device *rtcsecure;
#endif
unsigned long rtcalarm_time;
};
struct rpc_time_julian {
uint32_t year;
uint32_t month;
uint32_t day;
uint32_t hour;
uint32_t minute;
uint32_t second;
uint32_t day_of_week;
};
struct rtc_tod_args {
int proc;
struct rtc_time *tm;
};
#ifdef CONFIG_PM
struct suspend_state_info {
atomic_t state;
int64_t tick_at_suspend;
};
static struct suspend_state_info suspend_state = {ATOMIC_INIT(0), 0};
void msmrtc_updateatsuspend(struct timespec *ts)
{
int64_t now, sleep, sclk_max;
if (atomic_read(&suspend_state.state)) {
now = msm_timer_get_sclk_time(&sclk_max);
if (now && suspend_state.tick_at_suspend) {
if (now < suspend_state.tick_at_suspend) {
sleep = sclk_max -
suspend_state.tick_at_suspend + now;
} else
sleep = now - suspend_state.tick_at_suspend;
timespec_add_ns(ts, sleep);
suspend_state.tick_at_suspend = now;
} else
pr_err("%s: Invalid ticks from SCLK now=%lld"
"tick_at_suspend=%lld", __func__, now,
suspend_state.tick_at_suspend);
}
}
#else
void msmrtc_updateatsuspend(struct timespec *ts) { }
#endif
EXPORT_SYMBOL(msmrtc_updateatsuspend);
static int msmrtc_tod_proc_args(struct msm_rpc_client *client, void *buff,
void *data)
{
struct rtc_tod_args *rtc_args = data;
if ((rtc_args->proc == TIMEREMOTE_PROCEEDURE_SET_JULIAN)
#ifdef CONFIG_RTC_SECURE_TIME_SUPPORT
|| (rtc_args->proc == TIMEREMOTE_PROCEEDURE_SET_SECURE_JULIAN)
#endif
) {
struct timeremote_set_julian_req {
uint32_t opt_arg;
struct rpc_time_julian time;
};
struct timeremote_set_julian_req *set_req = buff;
set_req->opt_arg = cpu_to_be32(0x1);
set_req->time.year = cpu_to_be32(rtc_args->tm->tm_year);
set_req->time.month = cpu_to_be32(rtc_args->tm->tm_mon + 1);
set_req->time.day = cpu_to_be32(rtc_args->tm->tm_mday);
set_req->time.hour = cpu_to_be32(rtc_args->tm->tm_hour);
set_req->time.minute = cpu_to_be32(rtc_args->tm->tm_min);
set_req->time.second = cpu_to_be32(rtc_args->tm->tm_sec);
set_req->time.day_of_week = cpu_to_be32(rtc_args->tm->tm_wday);
return sizeof(*set_req);
} else if ((rtc_args->proc == TIMEREMOTE_PROCEEDURE_GET_JULIAN)
#ifdef CONFIG_RTC_SECURE_TIME_SUPPORT
|| (rtc_args->proc == TIMEREMOTE_PROCEEDURE_GET_SECURE_JULIAN)
#endif
) {
*(uint32_t *)buff = (uint32_t) cpu_to_be32(0x1);
return sizeof(uint32_t);
} else
return 0;
}
static bool rtc_check_overflow(struct rtc_time *tm)
{
if (tm->tm_year < 138)
return false;
if (tm->tm_year > 138)
return true;
if ((tm->tm_year == 138) && (tm->tm_mon == 0) && (tm->tm_mday < 19))
return false;
return true;
}
static int msmrtc_tod_proc_result(struct msm_rpc_client *client, void *buff,
void *data)
{
struct rtc_tod_args *rtc_args = data;
if ((rtc_args->proc == TIMEREMOTE_PROCEEDURE_GET_JULIAN)
#ifdef CONFIG_RTC_SECURE_TIME_SUPPORT
|| (rtc_args->proc == TIMEREMOTE_PROCEEDURE_GET_SECURE_JULIAN)
#endif
) {
struct timeremote_get_julian_rep {
uint32_t opt_arg;
struct rpc_time_julian time;
};
struct timeremote_get_julian_rep *result = buff;
if (be32_to_cpu(result->opt_arg) != 0x1)
return -ENODATA;
rtc_args->tm->tm_year = be32_to_cpu(result->time.year);
rtc_args->tm->tm_mon = be32_to_cpu(result->time.month);
rtc_args->tm->tm_mday = be32_to_cpu(result->time.day);
rtc_args->tm->tm_hour = be32_to_cpu(result->time.hour);
rtc_args->tm->tm_min = be32_to_cpu(result->time.minute);
rtc_args->tm->tm_sec = be32_to_cpu(result->time.second);
rtc_args->tm->tm_wday = be32_to_cpu(result->time.day_of_week);
pr_debug("%s: %.2u/%.2u/%.4u %.2u:%.2u:%.2u (%.2u)\n",
__func__, rtc_args->tm->tm_mon, rtc_args->tm->tm_mday,
rtc_args->tm->tm_year, rtc_args->tm->tm_hour,
rtc_args->tm->tm_min, rtc_args->tm->tm_sec,
rtc_args->tm->tm_wday);
/* RTC layer expects years to start at 1900 */
rtc_args->tm->tm_year -= 1900;
/* RTC layer expects mons to be 0 based */
rtc_args->tm->tm_mon--;
if (rtc_valid_tm(rtc_args->tm) < 0) {
pr_err("%s: Retrieved data/time not valid\n", __func__);
rtc_time_to_tm(0, rtc_args->tm);
}
/*
* Check if the time received is > 01-19-2038, to prevent
* overflow. In such a case, return the EPOCH time.
*/
if (rtc_check_overflow(rtc_args->tm) == true) {
pr_err("Invalid time (year > 2038)\n");
rtc_time_to_tm(0, rtc_args->tm);
}
return 0;
} else
return 0;
}
static int
msmrtc_timeremote_set_time(struct device *dev, struct rtc_time *tm)
{
int rc;
struct rtc_tod_args rtc_args;
struct msm_rtc *rtc_pdata = dev_get_drvdata(dev);
if (tm->tm_year < 1900)
tm->tm_year += 1900;
if (tm->tm_year < 1970)
return -EINVAL;
dev_dbg(dev, "%s: %.2u/%.2u/%.4u %.2u:%.2u:%.2u (%.2u)\n",
__func__, tm->tm_mon, tm->tm_mday, tm->tm_year,
tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
rtc_args.proc = TIMEREMOTE_PROCEEDURE_SET_JULIAN;
rtc_args.tm = tm;
rc = msm_rpc_client_req(rtc_pdata->rpc_client,
TIMEREMOTE_PROCEEDURE_SET_JULIAN,
msmrtc_tod_proc_args, &rtc_args,
NULL, NULL, -1);
if (rc) {
dev_err(dev, "%s: rtc time (TOD) could not be set\n", __func__);
return rc;
}
return 0;
}
static int
msmrtc_timeremote_read_time(struct device *dev, struct rtc_time *tm)
{
int rc;
struct rtc_tod_args rtc_args;
struct msm_rtc *rtc_pdata = dev_get_drvdata(dev);
rtc_args.proc = TIMEREMOTE_PROCEEDURE_GET_JULIAN;
rtc_args.tm = tm;
rc = msm_rpc_client_req(rtc_pdata->rpc_client,
TIMEREMOTE_PROCEEDURE_GET_JULIAN,
msmrtc_tod_proc_args, &rtc_args,
msmrtc_tod_proc_result, &rtc_args, -1);
if (rc) {
dev_err(dev, "%s: Error retrieving rtc (TOD) time\n", __func__);
return rc;
}
return 0;
}
static int
msmrtc_virtual_alarm_set(struct device *dev, struct rtc_wkalrm *a)
{
struct msm_rtc *rtc_pdata = dev_get_drvdata(dev);
unsigned long now = get_seconds();
if (!a->enabled) {
rtc_pdata->rtcalarm_time = 0;
return 0;
} else
rtc_tm_to_time(&a->time, &(rtc_pdata->rtcalarm_time));
if (now > rtc_pdata->rtcalarm_time) {
dev_err(dev, "%s: Attempt to set alarm in the past\n",
__func__);
rtc_pdata->rtcalarm_time = 0;
return -EINVAL;
}
return 0;
}
static struct rtc_class_ops msm_rtc_ops = {
.read_time = msmrtc_timeremote_read_time,
.set_time = msmrtc_timeremote_set_time,
.set_alarm = msmrtc_virtual_alarm_set,
};
#ifdef CONFIG_RTC_SECURE_TIME_SUPPORT
static int
msmrtc_timeremote_set_time_secure(struct device *dev, struct rtc_time *tm)
{
int rc;
struct rtc_tod_args rtc_args;
struct msm_rtc *rtc_pdata = dev_get_drvdata(dev);
if (tm->tm_year < 1900)
tm->tm_year += 1900;
if (tm->tm_year < 1970)
return -EINVAL;
dev_dbg(dev, "%s: %.2u/%.2u/%.4u %.2u:%.2u:%.2u (%.2u)\n",
__func__, tm->tm_mon, tm->tm_mday, tm->tm_year,
tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
rtc_args.proc = TIMEREMOTE_PROCEEDURE_SET_SECURE_JULIAN;
rtc_args.tm = tm;
rc = msm_rpc_client_req(rtc_pdata->rpc_client,
TIMEREMOTE_PROCEEDURE_SET_SECURE_JULIAN,
msmrtc_tod_proc_args, &rtc_args,
NULL, NULL, -1);
if (rc) {
dev_err(dev,
"%s: rtc secure time could not be set\n", __func__);
return rc;
}
return 0;
}
static int
msmrtc_timeremote_read_time_secure(struct device *dev, struct rtc_time *tm)
{
int rc;
struct rtc_tod_args rtc_args;
struct msm_rtc *rtc_pdata = dev_get_drvdata(dev);
rtc_args.proc = TIMEREMOTE_PROCEEDURE_GET_SECURE_JULIAN;
rtc_args.tm = tm;
rc = msm_rpc_client_req(rtc_pdata->rpc_client,
TIMEREMOTE_PROCEEDURE_GET_SECURE_JULIAN, msmrtc_tod_proc_args,
&rtc_args, msmrtc_tod_proc_result, &rtc_args, -1);
if (rc) {
dev_err(dev,
"%s: Error retrieving secure rtc time\n", __func__);
return rc;
}
return 0;
}
static struct rtc_class_ops msm_rtc_ops_secure = {
.read_time = msmrtc_timeremote_read_time_secure,
.set_time = msmrtc_timeremote_set_time_secure,
};
#endif
static void process_cb_request(void *buffer)
{
struct rtc_cb_recv *rtc_cb = buffer;
struct timespec ts, tv;
rtc_cb->client_cb_id = be32_to_cpu(rtc_cb->client_cb_id);
rtc_cb->event = be32_to_cpu(rtc_cb->event);
rtc_cb->cb_info_ptr = be32_to_cpu(rtc_cb->cb_info_ptr);
if (rtc_cb->event == EVENT_TOD_CHANGE) {
/* A TOD update has been received from the Modem */
rtc_cb->cb_info_data.tod_update.tick =
be32_to_cpu(rtc_cb->cb_info_data.tod_update.tick);
rtc_cb->cb_info_data.tod_update.stamp =
be64_to_cpu(rtc_cb->cb_info_data.tod_update.stamp);
rtc_cb->cb_info_data.tod_update.freq =
be32_to_cpu(rtc_cb->cb_info_data.tod_update.freq);
pr_info("RPC CALL -- TOD TIME UPDATE: ttick = %d\n"
"stamp=%lld, freq = %d\n",
rtc_cb->cb_info_data.tod_update.tick,
rtc_cb->cb_info_data.tod_update.stamp,
rtc_cb->cb_info_data.tod_update.freq);
getnstimeofday(&ts);
msmrtc_updateatsuspend(&ts);
rtc_hctosys();
getnstimeofday(&tv);
/* Update the alarm information with the new time info. */
alarm_update_timedelta(ts, tv);
} else
pr_err("%s: Unknown event EVENT=%x\n",
__func__, rtc_cb->event);
}
static int msmrtc_cb_func(struct msm_rpc_client *client, void *buffer, int size)
{
int rc = -1;
struct rpc_request_hdr *recv = buffer;
recv->xid = be32_to_cpu(recv->xid);
recv->type = be32_to_cpu(recv->type);
recv->rpc_vers = be32_to_cpu(recv->rpc_vers);
recv->prog = be32_to_cpu(recv->prog);
recv->vers = be32_to_cpu(recv->vers);
recv->procedure = be32_to_cpu(recv->procedure);
if (recv->procedure == RTC_EVENT_CB_PROC)
process_cb_request((void *) (recv + 1));
msm_rpc_start_accepted_reply(client, recv->xid,
RPC_ACCEPTSTAT_SUCCESS);
rc = msm_rpc_send_accepted_reply(client, 0);
if (rc) {
pr_debug("%s: sending reply failed: %d\n", __func__, rc);
return rc;
}
return 0;
}
static int msmrtc_rpc_proc_args(struct msm_rpc_client *client, void *buff,
void *data)
{
struct msm_rtc *rtc_pdata = data;
if (rtc_pdata->proc == RTC_CLIENT_INIT_PROC) {
/* arguments passed to the client_init function */
struct rtc_client_init_req {
enum client_type client;
uint32_t client_id_ptr;
u8 client_id;
enum processor_type processor;
};
struct rtc_client_init_req *req_1 = buff;
req_1->client = cpu_to_be32(CLIENT_TYPE_INTERNAL);
req_1->client_id_ptr = cpu_to_be32(0x1);
req_1->client_id = (u8) cpu_to_be32(0x1);
req_1->processor = cpu_to_be32(CLIENT_PROCESSOR_APP1);
return sizeof(*req_1);
} else if (rtc_pdata->proc == RTC_REQUEST_CB_PROC) {
/* arguments passed to the request_cb function */
struct rtc_event_req {
u8 client_id;
uint32_t rtc_cb_id;
};
struct rtc_event_req *req_2 = buff;
req_2->client_id = (u8) cpu_to_be32(rtc_pdata->client_id);
req_2->rtc_cb_id = cpu_to_be32(RTC_CB_ID);
return sizeof(*req_2);
} else
return 0;
}
static int msmrtc_rpc_proc_result(struct msm_rpc_client *client, void *buff,
void *data)
{
uint32_t result = -EINVAL;
struct msm_rtc *rtc_pdata = data;
if (rtc_pdata->proc == RTC_CLIENT_INIT_PROC) {
/* process reply received from client_init function */
uint32_t client_id_ptr;
result = be32_to_cpu(*(uint32_t *)buff);
buff += sizeof(uint32_t);
client_id_ptr = be32_to_cpu(*(uint32_t *)(buff));
buff += sizeof(uint32_t);
if (client_id_ptr == 1)
rtc_pdata->client_id = (u8)
be32_to_cpu(*(uint32_t *)(buff));
else {
pr_debug("%s: Client-id not received from Modem\n",
__func__);
return -EINVAL;
}
} else if (rtc_pdata->proc == RTC_REQUEST_CB_PROC) {
/* process reply received from request_cb function */
result = be32_to_cpu(*(uint32_t *)buff);
}
if (result == ERR_NONE) {
pr_debug("%s: RPC client reply for PROC=%x success\n",
__func__, rtc_pdata->proc);
return 0;
}
pr_debug("%s: RPC client registration failed ERROR=%x\n",
__func__, result);
return -EINVAL;
}
static int msmrtc_setup_cb(struct msm_rtc *rtc_pdata)
{
int rc;
/* Register with the server with client specific info */
rtc_pdata->proc = RTC_CLIENT_INIT_PROC;
rc = msm_rpc_client_req(rtc_pdata->rpc_client, RTC_CLIENT_INIT_PROC,
msmrtc_rpc_proc_args, rtc_pdata,
msmrtc_rpc_proc_result, rtc_pdata, -1);
if (rc) {
pr_debug("%s: RPC client registration for PROC:%x failed\n",
__func__, RTC_CLIENT_INIT_PROC);
return rc;
}
/* Register with server for the callback event */
rtc_pdata->proc = RTC_REQUEST_CB_PROC;
rc = msm_rpc_client_req(rtc_pdata->rpc_client, RTC_REQUEST_CB_PROC,
msmrtc_rpc_proc_args, rtc_pdata,
msmrtc_rpc_proc_result, rtc_pdata, -1);
if (rc) {
pr_debug("%s: RPC client registration for PROC:%x failed\n",
__func__, RTC_REQUEST_CB_PROC);
}
return rc;
}
static int __devinit
msmrtc_probe(struct platform_device *pdev)
{
int rc;
struct msm_rtc *rtc_pdata = NULL;
struct rpcsvr_platform_device *rdev =
container_of(pdev, struct rpcsvr_platform_device, base);
uint32_t prog_version;
if (pdev->id == (TIMEREMOTE_PROG_VER_1 & RPC_VERSION_MAJOR_MASK))
prog_version = TIMEREMOTE_PROG_VER_1;
else if (pdev->id == (TIMEREMOTE_PROG_VER_2 &
RPC_VERSION_MAJOR_MASK))
prog_version = TIMEREMOTE_PROG_VER_2;
else
return -EINVAL;
rtc_pdata = kzalloc(sizeof(*rtc_pdata), GFP_KERNEL);
if (rtc_pdata == NULL) {
dev_err(&pdev->dev,
"%s: Unable to allocate memory\n", __func__);
return -ENOMEM;
}
rtc_pdata->rpc_client = msm_rpc_register_client("rtc", rdev->prog,
prog_version, 1, msmrtc_cb_func);
if (IS_ERR(rtc_pdata->rpc_client)) {
dev_err(&pdev->dev,
"%s: init RPC failed! VERS = %x\n", __func__,
prog_version);
rc = PTR_ERR(rtc_pdata->rpc_client);
kfree(rtc_pdata);
return rc;
}
/*
* Set up the callback client.
* For older targets this initialization will fail
*/
rc = msmrtc_setup_cb(rtc_pdata);
if (rc)
dev_dbg(&pdev->dev, "%s: Could not initialize RPC callback\n",
__func__);
rtc_pdata->rtcalarm_time = 0;
platform_set_drvdata(pdev, rtc_pdata);
rtc_pdata->rtc = rtc_device_register("msm_rtc",
&pdev->dev,
&msm_rtc_ops,
THIS_MODULE);
if (IS_ERR(rtc_pdata->rtc)) {
dev_err(&pdev->dev, "%s: Can't register RTC device (%ld)\n",
pdev->name, PTR_ERR(rtc_pdata->rtc));
rc = PTR_ERR(rtc_pdata->rtc);
goto fail_cb_setup;
}
#ifdef CONFIG_RTC_SECURE_TIME_SUPPORT
rtc_pdata->rtcsecure = rtc_device_register("msm_rtc_secure",
&pdev->dev,
&msm_rtc_ops_secure,
THIS_MODULE);
if (IS_ERR(rtc_pdata->rtcsecure)) {
dev_err(&pdev->dev,
"%s: Can't register RTC Secure device (%ld)\n",
pdev->name, PTR_ERR(rtc_pdata->rtcsecure));
rtc_device_unregister(rtc_pdata->rtc);
rc = PTR_ERR(rtc_pdata->rtcsecure);
goto fail_cb_setup;
}
#endif
#ifdef CONFIG_RTC_ASYNC_MODEM_SUPPORT
rtc_hctosys();
#endif
return 0;
fail_cb_setup:
msm_rpc_unregister_client(rtc_pdata->rpc_client);
kfree(rtc_pdata);
return rc;
}
#ifdef CONFIG_PM
static void
msmrtc_alarmtimer_expired(unsigned long _data,
struct msm_rtc *rtc_pdata)
{
pr_debug("%s: Generating alarm event (src %lu)\n",
rtc_pdata->rtc->name, _data);
rtc_update_irq(rtc_pdata->rtc, 1, RTC_IRQF | RTC_AF);
rtc_pdata->rtcalarm_time = 0;
}
static int
msmrtc_suspend(struct platform_device *dev, pm_message_t state)
{
int rc, diff;
struct rtc_time tm;
unsigned long now;
struct msm_rtc *rtc_pdata = platform_get_drvdata(dev);
suspend_state.tick_at_suspend = msm_timer_get_sclk_time(NULL);
if (rtc_pdata->rtcalarm_time) {
rc = msmrtc_timeremote_read_time(&dev->dev, &tm);
if (rc) {
dev_err(&dev->dev,
"%s: Unable to read from RTC\n", __func__);
return rc;
}
rtc_tm_to_time(&tm, &now);
diff = rtc_pdata->rtcalarm_time - now;
if (diff <= 0) {
msmrtc_alarmtimer_expired(1 , rtc_pdata);
msm_pm_set_max_sleep_time(0);
atomic_inc(&suspend_state.state);
return 0;
}
msm_pm_set_max_sleep_time((int64_t)
((int64_t) diff * NSEC_PER_SEC));
} else
msm_pm_set_max_sleep_time(0);
atomic_inc(&suspend_state.state);
return 0;
}
static int
msmrtc_resume(struct platform_device *dev)
{
int rc, diff;
struct rtc_time tm;
unsigned long now;
struct msm_rtc *rtc_pdata = platform_get_drvdata(dev);
if (rtc_pdata->rtcalarm_time) {
rc = msmrtc_timeremote_read_time(&dev->dev, &tm);
if (rc) {
dev_err(&dev->dev,
"%s: Unable to read from RTC\n", __func__);
return rc;
}
rtc_tm_to_time(&tm, &now);
diff = rtc_pdata->rtcalarm_time - now;
if (diff <= 0)
msmrtc_alarmtimer_expired(2 , rtc_pdata);
}
suspend_state.tick_at_suspend = 0;
atomic_dec(&suspend_state.state);
return 0;
}
#else
#define msmrtc_suspend NULL
#define msmrtc_resume NULL
#endif
static int __devexit msmrtc_remove(struct platform_device *pdev)
{
struct msm_rtc *rtc_pdata = platform_get_drvdata(pdev);
rtc_device_unregister(rtc_pdata->rtc);
#ifdef CONFIG_RTC_SECURE_TIME_SUPPORT
rtc_device_unregister(rtc_pdata->rtcsecure);
#endif
msm_rpc_unregister_client(rtc_pdata->rpc_client);
kfree(rtc_pdata);
return 0;
}
static struct platform_driver msmrtc_driver = {
.probe = msmrtc_probe,
.suspend = msmrtc_suspend,
.resume = msmrtc_resume,
.remove = __devexit_p(msmrtc_remove),
.driver = {
.name = APP_TIMEREMOTE_PDEV_NAME,
.owner = THIS_MODULE,
},
};
static int __init msmrtc_init(void)
{
int rc;
/*
* For backward compatibility, register multiple platform
* drivers with the RPC PROG_VERS to be supported.
*
* Explicit cast away of 'constness' for driver.name in order to
* initialize it here.
*/
snprintf((char *)msmrtc_driver.driver.name,
strlen(msmrtc_driver.driver.name)+1,
"rs%08x", TIMEREMOTE_PROG_NUMBER);
pr_debug("RTC Registering with %s\n", msmrtc_driver.driver.name);
rc = platform_driver_register(&msmrtc_driver);
if (rc)
pr_err("%s: platfrom_driver_register failed\n", __func__);
return rc;
}
static void __exit msmrtc_exit(void)
{
platform_driver_unregister(&msmrtc_driver);
}
module_init(msmrtc_init);
module_exit(msmrtc_exit);
MODULE_DESCRIPTION("RTC driver for Qualcomm MSM7x00a chipsets");
MODULE_AUTHOR("San Mehat <san@android.com>");
MODULE_LICENSE("GPL");

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include/linux/rtc-msm.h Normal file
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/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef __RTC_MSM_H__
#define __RTC_MSM_H__
/*
* This is the only function which updates the xtime structure. This
* function is supposed to be called only once during kernel initialization.
* But we need to call this function whenever we receive an RTC update
* from MODEM.
*/
int rtc_hctosys(void);
extern void msm_pm_set_max_sleep_time(int64_t sleep_time_ns);
void msmrtc_updateatsuspend(struct timespec *ts);
#ifdef CONFIG_PM
int64_t msm_timer_get_sclk_time(int64_t *period);
#endif /* CONFIG_PM */
#endif /* __RTC_MSM_H__ */