static int gptimer_start(void)
{
int err;
u32 count = counter_config[0].count;
BUG_ON(gptimer != NULL);
/* First try to request timers from CORE power domain for OMAP3 */
if (cpu_is_omap34xx()) {
gptimer = omap_dm_timer_request_specific(10);
if (gptimer == NULL)
gptimer = omap_dm_timer_request_specific(11);
}
/* Just any timer would be fine */
if (gptimer == NULL)
gptimer = omap_dm_timer_request();
if (gptimer == NULL)
return -ENODEV;
omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_32_KHZ);
err = request_irq(omap_dm_timer_get_irq(gptimer), gptimer_interrupt,
IRQF_DISABLED, "oprofile gptimer", NULL);
if (err) {
omap_dm_timer_free(gptimer);
gptimer = NULL;
printk(KERN_ERR "oprofile: unable to request gptimer IRQ\n");
return err;
}
if (count < 1)
count = 1;
omap_dm_timer_set_load_start(gptimer, 1, 0xffffffff - count);
omap_dm_timer_set_int_enable(gptimer, OMAP_TIMER_INT_OVERFLOW);
return 0;
}
static void __init omap2_gp_clockevent_init(void)
{
u32 tick_rate;
gptimer = omap_dm_timer_request_specific(1);
BUG_ON(gptimer == NULL);
#if defined(CONFIG_OMAP_32K_TIMER)
omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_32_KHZ);
#else
omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_SYS_CLK);
#endif
tick_rate = clk_get_rate(omap_dm_timer_get_fclk(gptimer));
omap2_gp_timer_irq.dev_id = (void *)gptimer;
setup_irq(omap_dm_timer_get_irq(gptimer), &omap2_gp_timer_irq);
omap_dm_timer_set_int_enable(gptimer, OMAP_TIMER_INT_OVERFLOW);
clockevent_gpt.mult = div_sc(tick_rate, NSEC_PER_SEC,
clockevent_gpt.shift);
clockevent_gpt.max_delta_ns =
clockevent_delta2ns(0xffffffff, &clockevent_gpt);
clockevent_gpt.min_delta_ns =
clockevent_delta2ns(1, &clockevent_gpt);
clockevent_gpt.cpumask = cpumask_of(0);
clockevents_register_device(&clockevent_gpt);
}
static void gptimer_stop(void)
{
omap_dm_timer_set_int_enable(gptimer, 0);
free_irq(omap_dm_timer_get_irq(gptimer), NULL);
omap_dm_timer_free(gptimer);
gptimer = NULL;
}
static void __init omap2_gp_clockevent_init(int gptimer_id,
const char *fck_source)
{
int res;
res = omap_dm_timer_init_one(&clkev, gptimer_id, fck_source);
BUG_ON(res);
omap2_gp_timer_irq.dev_id = (void *)&clkev;
setup_irq(clkev.irq, &omap2_gp_timer_irq);
__omap_dm_timer_int_enable(&clkev, OMAP_TIMER_INT_OVERFLOW);
clockevent_gpt.mult = div_sc(clkev.rate, NSEC_PER_SEC,
clockevent_gpt.shift);
clockevent_gpt.max_delta_ns =
clockevent_delta2ns(0xffffffff, &clockevent_gpt);
clockevent_gpt.min_delta_ns =
clockevent_delta2ns(3, &clockevent_gpt);
/* Timer internal resynch latency. */
clockevent_gpt.cpumask = cpu_possible_mask;
clockevent_gpt.irq = omap_dm_timer_get_irq(&clkev);
clockevents_register_device(&clockevent_gpt);
pr_info("OMAP clockevent source: GPTIMER%d at %lu Hz\n",
gptimer_id, clkev.rate);
}
static int __devinit cloudsurfer_wakeup_probe(struct platform_device *pdev)
{
struct cloudsurfer_wakeup_struct *wkup;
struct input_dev *wkup_in;
u32 tick_rate, cycles;
int err;
/* Data structure allocation */
wkup = kzalloc(sizeof(struct cloudsurfer_wakeup_struct), GFP_KERNEL);
wkup_in = input_allocate_device();
if (!wkup_in) {
printk("CLOUDSURFER - Can't allocate wakeup timer input\n");
err = -ENOMEM;
goto error_input_dev;
}
/* Timer allocation and setup */
if ( (wkup->timer=omap_dm_timer_request_specific(1)) == NULL ) {
printk("CLOUDSURFER - can't allocate wakeup timer\n");
err = -ENODEV;
goto error_timer;
}
wkup->irq = omap_dm_timer_get_irq(wkup->timer);
omap_dm_timer_set_source(wkup->timer,OMAP_TIMER_SRC_32_KHZ);
tick_rate = clk_get_rate(omap_dm_timer_get_fclk(wkup->timer));
cycles = tick_rate * wakeup_seconds;
omap_dm_timer_stop(wkup->timer);
input_set_capability(wkup_in,EV_MSC,1);
input_set_capability(wkup_in,EV_MSC,2);
wkup_in->name = "cloudsurfer-wakeup";
wkup_in->phys = "cloudsurfer-wakeup/input0";
wkup_in->dev.parent = &pdev->dev;
cloudsurfer_irq_data.dev_id = wkup_in;
setup_irq(wkup->irq,&cloudsurfer_irq_data);
input_set_drvdata(wkup_in, wkup);
err = input_register_device(wkup_in);
if (err) {
printk("CLOUDSURFER -Can't register wakeup timer: %d\n", err);
goto error_register;
}
omap_dm_timer_set_int_enable(wkup->timer,OMAP_TIMER_INT_OVERFLOW);
omap_dm_timer_set_load_start(wkup->timer, 1, 0xffffffff - cycles);
platform_set_drvdata(pdev, wkup_in);
return 0;
error_register:
free_irq(wkup->irq, NULL);
error_timer:
input_free_device(wkup_in);
error_input_dev:
kfree(wkup);
return err;
}
static irqreturn_t omap_rproc_watchdog_isr(int irq, void *p)
{
struct rproc *rproc = p;
struct omap_rproc_pdata *pdata = rproc->dev->platform_data;
struct omap_rproc_timers_info *timers = pdata->timers;
struct omap_dm_timer *timer = NULL;
struct omap_rproc_priv *rpp = rproc->priv;
int i;
for (i = 0; i < pdata->timers_cnt; i++) {
if (irq == omap_dm_timer_get_irq(timers[i].odt)) {
timer = timers[i].odt;
break;
}
}
if (!timer)
return IRQ_NONE;
omap_dm_timer_write_status(timer, OMAP_TIMER_INT_OVERFLOW);
if (rpp->wdt_cb)
rpp->wdt_cb(rproc);
return IRQ_HANDLED;
}
static void __init omap2_gp_clockevent_init(int gptimer_id,
const char *fck_source,
const char *property)
{
int res;
clkev.id = gptimer_id;
clkev.errata = omap_dm_timer_get_errata();
/*
* For clock-event timers we never read the timer counter and
* so we are not impacted by errata i103 and i767. Therefore,
* we can safely ignore this errata for clock-event timers.
*/
__omap_dm_timer_override_errata(&clkev, OMAP_TIMER_ERRATA_I103_I767);
res = omap_dm_timer_init_one(&clkev, fck_source, property,
&clockevent_gpt.name, OMAP_TIMER_POSTED);
BUG_ON(res);
omap2_gp_timer_irq.dev_id = &clkev;
setup_irq(clkev.irq, &omap2_gp_timer_irq);
__omap_dm_timer_int_enable(&clkev, OMAP_TIMER_INT_OVERFLOW);
clockevent_gpt.cpumask = cpu_possible_mask;
clockevent_gpt.irq = omap_dm_timer_get_irq(&clkev);
clockevents_config_and_register(&clockevent_gpt, clkev.rate,
3, /* Timer internal resynch latency */
0xffffffff);
pr_info("OMAP clockevent source: %s at %lu Hz\n", clockevent_gpt.name,
clkev.rate);
}
static inline int omap_rproc_start(struct rproc *rproc, u64 bootaddr)
{
struct device *dev = rproc->dev;
struct platform_device *pdev = to_platform_device(dev);
struct omap_rproc_pdata *pdata = dev->platform_data;
struct omap_rproc_timers_info *timers = pdata->timers;
struct omap_rproc_priv *rpp = rproc->priv;
int i;
int ret = 0;
if (rproc->secure_mode) {
rproc->secure_reset = true;
ret = rproc_drm_invoke_service(rproc->secure_mode);
if (ret) {
dev_err(rproc->dev, "rproc_drm_invoke_service failed "
"for secure_enable ret = 0x%x\n", ret);
return -ENXIO;
}
}
#ifdef CONFIG_REMOTE_PROC_AUTOSUSPEND
ret = _init_pm_flags(rproc);
if (ret)
return ret;
#endif
for (i = 0; i < pdata->timers_cnt; i++) {
timers[i].odt = omap_dm_timer_request_specific(timers[i].id);
if (!timers[i].odt) {
ret = -EBUSY;
goto out;
}
omap_dm_timer_set_source(timers[i].odt, OMAP_TIMER_SRC_SYS_CLK);
#ifdef CONFIG_REMOTEPROC_WATCHDOG
/* GPT 9 & 11 (ipu); GPT 6 (dsp) are used as watchdog timers */
if ((!strcmp(rproc->name, "dsp") && timers[i].id == 6) ||
(!strcmp(rproc->name, "ipu") &&
(timers[i].id == DUCATI_WDT_TIMER_1 || timers[i].id == DUCATI_WDT_TIMER_2))) {
ret = request_irq(omap_dm_timer_get_irq(timers[i].odt),
omap_rproc_watchdog_isr, IRQF_DISABLED,
"rproc-wdt", rproc);
/* Clean counter, remoteproc proc will set the value */
omap_dm_timer_set_load(timers[i].odt, 0, 0);
}
#endif
}
rpp->bootaddr = bootaddr;
ret = omap_device_enable(pdev);
out:
if (ret) {
while (i--) {
omap_dm_timer_free(timers[i].odt);
timers[i].odt = NULL;
}
}
return ret;
}
static int __devexit cloudsurfer_wakeup_remove(struct platform_device *pdev)
{
struct input_dev *wkup_in = platform_get_drvdata(pdev);
struct cloudsurfer_wakeup_struct *wkup = input_get_drvdata(wkup_in);
int irq = omap_dm_timer_get_irq(wkup->timer);
free_irq(irq, wkup);
kfree(wkup);
input_unregister_device(wkup_in);
return 0;
}
static int __init gptimer_request_init(void)
{
struct clk *gt_fclk;
uint32_t gt_rate;
/*Requesting for any available timer*/
timer_ptr = omap_dm_timer_request();
if (timer_ptr == NULL) {
/*Timers are not available*/
printk(KERN_ERR "GPtimers are not available\n");
return -1;
}
switch (clock_type) {
case 1:
/*Set the clock source to 32Khz Clock*/
printk(KERN_INFO "Using OMAP_TIMER_SRC_32_KHZ source\n");
omap_dm_timer_set_source(timer_ptr,
OMAP_TIMER_SRC_32_KHZ);
break;
case 2:
/*Set the clock source to System Clock*/
printk(KERN_INFO "Using OMAP_TIMER_SRC_SYS_CLK source\n");
omap_dm_timer_set_source(timer_ptr,
OMAP_TIMER_SRC_SYS_CLK);
break;
case 3:
/*Set the clock source to System Clock*/
printk(KERN_INFO "Using OMAP_TIMER_SRC_EXT_CLK source\n");
omap_dm_timer_set_source(timer_ptr,
OMAP_TIMER_SRC_EXT_CLK);
break;
default:
printk(KERN_ERR "Invalid clock_type value. Use 1, 2 or 3\n");
return -1;
}
/*Figure out what IRQ our timer triggers*/
timer_irq = omap_dm_timer_get_irq(timer_ptr);
/*Get clock rate in Hz*/
gt_fclk = omap_dm_timer_get_fclk(timer_ptr);
gt_rate = clk_get_rate(gt_fclk);
/*Start the timer!*/
omap_dm_timer_start(timer_ptr);
printk(KERN_INFO "GP Timer initialized and started (%lu Hz, IRQ %d)\n",
(long unsigned)gt_rate, timer_irq);
return 0;
}
// Initialize the kernel module
static int __init gptimer_test_init(void)
{
int ret = 0;
struct clk *gt_fclk;
uint32_t gt_rate;
printk("gptimer test: starting moudle init\n");
// request a timer (we are asking for ANY open timer, see dmtimer.c for details on how this works)
timer_ptr = omap_dm_timer_request();
if(timer_ptr == NULL){
// oops, no timers available
printk("gptimer test: No more gp timers available, bailing out\n");
return -1;
}
// set the clock source to system clock
omap_dm_timer_set_source(timer_ptr, OMAP_TIMER_SRC_SYS_CLK);
// set prescalar to 1:1
omap_dm_timer_set_prescaler(timer_ptr, 32);
// figure out what IRQ our timer triggers
timer_irq = omap_dm_timer_get_irq(timer_ptr);
// install our IRQ handler for our timer
ret = request_irq(timer_irq, timer_irq_handler, IRQF_DISABLED | IRQF_TIMER , "gptimer test", timer_irq_handler);
if(ret){
printk("gptimer test: request_irq failed (on irq %d), bailing out\n", timer_irq);
return ret;
}
// get clock rate in Hz
gt_fclk = omap_dm_timer_get_fclk(timer_ptr);
gt_rate = clk_get_rate(gt_fclk);
// set preload, and autoreload
// we set it to the clock rate in order to get 1 overflow every second
omap_dm_timer_set_load(timer_ptr, 1, 0xFFFFFFFF - gt_rate);
// setup timer to trigger our IRQ on the overflow event
omap_dm_timer_set_int_enable(timer_ptr, OMAP_TIMER_INT_OVERFLOW);
// start the timer!
omap_dm_timer_start(timer_ptr);
// done!
printk("gptimer test: GP Timer initialized and started (%lu Hz, IRQ %d)\n", (long unsigned)gt_rate, timer_irq);
// return sucsess
return 0;
}
static void __init omap2_gp_clockevent_init(void)
{
u32 tick_rate;
int src;
u32* time_base = ioremap(0x4A318000, SZ_4K);
inited = 1;
gptimer = omap_dm_timer_request_specific(gptimer_id);
BUG_ON(gptimer == NULL);
gptimer_wakeup = gptimer;
#if defined(CONFIG_OMAP_32K_TIMER)
src = OMAP_TIMER_SRC_32_KHZ;
#else
src = OMAP_TIMER_SRC_SYS_CLK;
WARN(gptimer_id == 12, "WARNING: GPTIMER12 can only use the "
"secure 32KiHz clock source\n");
#endif
if (gptimer_id != 12)
WARN(IS_ERR_VALUE(omap_dm_timer_set_source(gptimer, src)),
"timer-gp: omap_dm_timer_set_source() failed\n");
tick_rate = clk_get_rate(omap_dm_timer_get_fclk(gptimer));
pr_info("OMAP clockevent source: GPTIMER%d at %u Hz\n",
gptimer_id, tick_rate);
print_timer(time_base);
omap2_gp_timer_irq.dev_id = (void *)gptimer;
//TODO: slow for safety
omap_dm_timer_set_load_start(gptimer, 1, 0);
print_timer(time_base);
setup_irq(omap_dm_timer_get_irq(gptimer), &omap2_gp_timer_irq);
clockevent_gpt.mult = div_sc(tick_rate, NSEC_PER_SEC,
clockevent_gpt.shift);
clockevent_gpt.max_delta_ns =
clockevent_delta2ns(0xffffffff, &clockevent_gpt);
clockevent_gpt.min_delta_ns =
clockevent_delta2ns(3, &clockevent_gpt);
/* Timer internal resynch latency. */
clockevent_gpt.cpumask = cpumask_of(0);
clockevents_register_device(&clockevent_gpt);
omap_dm_timer_set_int_enable(gptimer, OMAP_TIMER_INT_OVERFLOW);
print_timer(time_base);
}
static int irblaster_remove(struct platform_device *pdev)
{
int irqno = omap_dm_timer_get_irq(gpt_pwm_list[IRBLASTER_TIMER_CTRL].timer);
free_irq(irqno, NULL);
misc_deregister(&irblast_miscdev);
_select_default_config();
omap_dm_timer_free(gpt_pwm_list[IRBLASTER_PWM].timer);
omap_dm_timer_free(gpt_pwm_list[IRBLASTER_TIMER_CTRL].timer);
return 0;
}
static void __init omap2_gp_timer_init(void)
{
u32 tick_period;
omap_dm_timer_init();
gptimer = omap_dm_timer_request_specific(1);
BUG_ON(gptimer == NULL);
omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_SYS_CLK);
tick_period = clk_get_rate(omap_dm_timer_get_fclk(gptimer)) / 100;
tick_period -= 1;
setup_irq(omap_dm_timer_get_irq(gptimer), &omap2_gp_timer_irq);
omap2_gp_timer_start(tick_period);
}
static int lirc_rx51_init_port(struct lirc_rx51 *lirc_rx51)
{
struct clk *clk_fclk;
int retval, pwm_timer = lirc_rx51->pwm_timer_num;
lirc_rx51->pwm_timer = omap_dm_timer_request_specific(pwm_timer);
if (lirc_rx51->pwm_timer == NULL) {
dev_err(lirc_rx51->dev, ": Error requesting GPT%d timer\n",
pwm_timer);
return -EBUSY;
}
lirc_rx51->pulse_timer = omap_dm_timer_request();
if (lirc_rx51->pulse_timer == NULL) {
dev_err(lirc_rx51->dev, ": Error requesting pulse timer\n");
retval = -EBUSY;
goto err1;
}
omap_dm_timer_set_source(lirc_rx51->pwm_timer, OMAP_TIMER_SRC_SYS_CLK);
omap_dm_timer_set_source(lirc_rx51->pulse_timer,
OMAP_TIMER_SRC_SYS_CLK);
omap_dm_timer_enable(lirc_rx51->pwm_timer);
omap_dm_timer_enable(lirc_rx51->pulse_timer);
lirc_rx51->irq_num = omap_dm_timer_get_irq(lirc_rx51->pulse_timer);
retval = request_irq(lirc_rx51->irq_num, lirc_rx51_interrupt_handler,
IRQF_DISABLED | IRQF_SHARED,
"lirc_pulse_timer", lirc_rx51);
if (retval) {
dev_err(lirc_rx51->dev, ": Failed to request interrupt line\n");
goto err2;
}
clk_fclk = omap_dm_timer_get_fclk(lirc_rx51->pwm_timer);
lirc_rx51->fclk_khz = clk_fclk->rate / 1000;
return 0;
err2:
omap_dm_timer_free(lirc_rx51->pulse_timer);
err1:
omap_dm_timer_free(lirc_rx51->pwm_timer);
return retval;
}
static void __init omap2_gp_clockevent_init(void)
{
u32 tick_rate;
int src;
inited = 1;
gptimer = omap_dm_timer_request_specific(gptimer_id);
BUG_ON(gptimer == NULL);
#if defined(CONFIG_OMAP_32K_TIMER)
src = OMAP_TIMER_SRC_32_KHZ;
#else
src = OMAP_TIMER_SRC_SYS_CLK;
WARN(gptimer_id == 12, "WARNING: GPTIMER12 can only use the "
"secure 32KiHz clock source\n");
#endif
if (gptimer_id != 12)
WARN(IS_ERR_VALUE(omap_dm_timer_set_source(gptimer, src)),
"timer-gp: omap_dm_timer_set_source() failed\n");
tick_rate = clk_get_rate(omap_dm_timer_get_fclk(gptimer));
if (cpu_is_omap44xx())
/* Assuming 32kHz clk is driving GPT1 */
tick_rate = 32768; /* FIXME: */
pr_info("OMAP clockevent source: GPTIMER%d at %u Hz\n",
gptimer_id, tick_rate);
omap2_gp_timer_irq.dev_id = (void *)gptimer;
setup_irq(omap_dm_timer_get_irq(gptimer), &omap2_gp_timer_irq);
omap_dm_timer_set_int_enable(gptimer, OMAP_TIMER_INT_OVERFLOW);
clockevent_gpt.mult = div_sc(tick_rate, NSEC_PER_SEC,
clockevent_gpt.shift);
clockevent_gpt.max_delta_ns =
clockevent_delta2ns(0xffffffff, &clockevent_gpt);
clockevent_gpt.min_delta_ns =
clockevent_delta2ns(3, &clockevent_gpt);
/* Timer internal resynch latency. */
clockevent_gpt.cpumask = cpumask_of(0);
clockevents_register_device(&clockevent_gpt);
}
static int __init omap4_setup_gpt2(void)
{
/* Set up GPT2 for the WA */
gptimer2 = omap_dm_timer_request_specific(2);
BUG_ON(gptimer2 == NULL);
printk(KERN_INFO "Enabling AXI2OCP errata Fix \n");
omap_dm_timer_set_source(gptimer2, OMAP_TIMER_SRC_32_KHZ);
gpt2_timer_irq.dev_id = (void *)gptimer2;
setup_irq(omap_dm_timer_get_irq(gptimer2), &gpt2_timer_irq);
omap_dm_timer_set_int_enable(gptimer2, OMAP_TIMER_INT_OVERFLOW);
/*
* Timer reload value is used based on mpu @ 600 MHz
* And hence bridge is at 300 MHz. 65K cycle = 216 uS
* 6 * 1/32 kHz => ~187 us
*/
omap_dm_timer_set_load_start(gptimer2, 1, 0xffffff06);
return 0;
}
static void __init omap2_gp_clockevent_init(int gptimer_id,
const char *fck_source,
const char *property)
{
int res;
clkev.errata = omap_dm_timer_get_errata();
/*
* For clock-event timers we never read the timer counter and
* so we are not impacted by errata i103 and i767. Therefore,
* we can safely ignore this errata for clock-event timers.
*/
__omap_dm_timer_override_errata(&clkev, OMAP_TIMER_ERRATA_I103_I767);
res = omap_dm_timer_init_one(&clkev, gptimer_id, fck_source, property,
OMAP_TIMER_POSTED);
BUG_ON(res);
omap2_gp_timer_irq.dev_id = &clkev;
setup_irq(clkev.irq, &omap2_gp_timer_irq);
__omap_dm_timer_int_enable(&clkev, OMAP_TIMER_INT_OVERFLOW);
clockevent_gpt.mult = div_sc(clkev.rate, NSEC_PER_SEC,
clockevent_gpt.shift);
clockevent_gpt.max_delta_ns =
clockevent_delta2ns(0xffffffff, &clockevent_gpt);
clockevent_gpt.min_delta_ns =
clockevent_delta2ns(3, &clockevent_gpt);
/* Timer internal resynch latency. */
clockevent_gpt.cpumask = cpu_possible_mask;
clockevent_gpt.irq = omap_dm_timer_get_irq(&clkev);
clockevents_register_device(&clockevent_gpt);
pr_info("OMAP clockevent source: GPTIMER%d at %lu Hz\n",
gptimer_id, clkev.rate);
}
static inline int omap_rproc_stop(struct rproc *rproc)
{
struct device *dev = rproc->dev;
struct platform_device *pdev = to_platform_device(dev);
struct omap_rproc_pdata *pdata = dev->platform_data;
struct omap_rproc_timers_info *timers = pdata->timers;
int ret, i;
#ifdef CONFIG_REMOTE_PROC_AUTOSUSPEND
_destroy_pm_flags(rproc);
#endif
if (rproc->secure_reset) {
ret = rproc_drm_invoke_service(false);
if (ret)
dev_err(rproc->dev, "rproc_drm_invoke_service failed "
"for secure disable ret = 0x%x\n", ret);
rproc->secure_reset = false;
}
ret = omap_device_idle(pdev);
if (ret)
goto err;
for (i = 0; i < pdata->timers_cnt; i++) {
#ifdef CONFIG_REMOTEPROC_WATCHDOG
/* GPT 9 & 11 (ipu); GPT 6 (dsp) are used as watchdog timers */
if ((!strcmp(rproc->name, "dsp") && timers[i].id == 6) ||
(!strcmp(rproc->name, "ipu") &&
(timers[i].id == DUCATI_WDT_TIMER_1 || timers[i].id == DUCATI_WDT_TIMER_2)))
free_irq(omap_dm_timer_get_irq(timers[i].odt), rproc);
#endif
omap_dm_timer_free(timers[i].odt);
timers[i].odt = NULL;
}
err:
return ret;
}
static int _init_gpt(void)
{
int irqno;
int ret = 0;
if ((gpt_pwm_list[IRBLASTER_PWM].timer = omap_dm_timer_request_specific(gpt_pwm_list[IRBLASTER_PWM].no)) == NULL) {
printk(KERN_ERR "%s: failed to request dm-timer (%d)\n", gpt_pwm_list[IRBLASTER_PWM].name, gpt_pwm_list[IRBLASTER_PWM].no);
return -ENODEV;
}
omap_dm_timer_set_source(gpt_pwm_list[IRBLASTER_PWM].timer, gpt_pwm_list[IRBLASTER_PWM].source);
gpt_pwm_list[IRBLASTER_PWM].rate = clk_get_rate(omap_dm_timer_get_fclk(gpt_pwm_list[IRBLASTER_PWM].timer));
printk(KERN_DEBUG "%s (%d) timer rate is: %d\n", gpt_pwm_list[IRBLASTER_PWM].name, gpt_pwm_list[IRBLASTER_PWM].no, gpt_pwm_list[IRBLASTER_PWM].rate);
if ((gpt_pwm_list[IRBLASTER_TIMER_CTRL].timer = omap_dm_timer_request_specific(gpt_pwm_list[IRBLASTER_TIMER_CTRL].no)) == NULL) {
printk(KERN_ERR "%s: failed to request dm-timer (%d)\n", gpt_pwm_list[IRBLASTER_TIMER_CTRL].name, gpt_pwm_list[IRBLASTER_TIMER_CTRL].no);
omap_dm_timer_free(gpt_pwm_list[IRBLASTER_PWM].timer);
return -ENODEV;
}
omap_dm_timer_set_source(gpt_pwm_list[IRBLASTER_TIMER_CTRL].timer, gpt_pwm_list[IRBLASTER_TIMER_CTRL].source);
gpt_pwm_list[IRBLASTER_TIMER_CTRL].rate = clk_get_rate(omap_dm_timer_get_fclk(gpt_pwm_list[IRBLASTER_TIMER_CTRL].timer));
printk(KERN_DEBUG "%s (%d) timer rate is: %d\n", gpt_pwm_list[IRBLASTER_TIMER_CTRL].name, gpt_pwm_list[IRBLASTER_TIMER_CTRL].no, gpt_pwm_list[IRBLASTER_TIMER_CTRL].rate);
/* select irblaster configuration */
_select_irb_config();
/* enable timer clock */
omap_dm_timer_enable(gpt_pwm_list[IRBLASTER_PWM].timer);
omap_dm_timer_enable(gpt_pwm_list[IRBLASTER_TIMER_CTRL].timer);
/* set modulation mod */
/* trigger on overflow and match */
omap_dm_timer_set_pwm(gpt_pwm_list[IRBLASTER_PWM].timer,0,1,2);
omap_dm_timer_set_pwm(gpt_pwm_list[IRBLASTER_TIMER_CTRL].timer, 0, 1, 2);
//if ( gpt_pwm_list[IRBLASTER_TIMER_CTRL].mux_config )
// omap_cfg_reg(gpt_pwm_list[IRBLASTER_TIMER_CTRL].mux_config);
irqno = omap_dm_timer_get_irq(gpt_pwm_list[IRBLASTER_TIMER_CTRL].timer);
if (request_irq(irqno, omap2_irblaster_timer_interrupt,
IRQF_DISABLED, "gp timer", NULL)) {
ret = -EBUSY;
goto failed_request_irq;
}
omap_dm_timer_set_int_enable(gpt_pwm_list[IRBLASTER_TIMER_CTRL].timer, IRBLASTER_TIMER_CTRL_IT_TYPE);
/* disable timer clocks after init */
omap_dm_timer_disable(gpt_pwm_list[IRBLASTER_TIMER_CTRL].timer);
omap_dm_timer_disable(gpt_pwm_list[IRBLASTER_PWM].timer);
init_waitqueue_head(&irb_wait);
_gio_debug_init();
return 0;
failed_request_irq:
omap_dm_timer_free(gpt_pwm_list[IRBLASTER_PWM].timer);
omap_dm_timer_free(gpt_pwm_list[IRBLASTER_TIMER_CTRL].timer);
return ret;
}
static int __init pwm_start(void) {
int ret = 0;
struct clk *timer_fclk;
uint32_t gt_rate;
printk(KERN_INFO "Loading PWM Module... \n");
// request any timer
timer_ptr = omap_dm_timer_request();
if(timer_ptr == NULL){
// no timers available
printk("pwm module: No more gp timers available, bailing out\n");
return -1;
}
// set the clock source to the system clock
ret = omap_dm_timer_set_source(timer_ptr, OMAP_TIMER_SRC_SYS_CLK);
if(ret) {
printk("pwm module: could not set source\n");
return -1;
}
// set prescalar to 1:1
omap_dm_timer_set_prescaler(timer_ptr, 0);
// figure out what IRQ our timer triggers
timer_irq = omap_dm_timer_get_irq(timer_ptr);
// install our IRQ handler for our timer
ret = request_irq(timer_irq, timer_irq_handler, IRQF_DISABLED | IRQF_TIMER , "pwm", timer_irq_handler);
if(ret){
printk("pwm module: request_irq failed (on irq %d), bailing out\n", timer_irq);
return ret;
}
// get clock rate in Hz and add it to struct
timer_fclk = omap_dm_timer_get_fclk(timer_ptr);
gt_rate = clk_get_rate(timer_fclk);
pwm_data_ptr.timer_rate = gt_rate;
// set preload, and autoreload
// we set it to a default of 1kHz
set_pwm_freq(1000);
// setup timer to trigger IRQ on the overflow
omap_dm_timer_set_int_enable(timer_ptr, OMAP_TIMER_INT_OVERFLOW);
// start the timer
omap_dm_timer_start(timer_ptr);
// done!
printk("pwm module: GP Timer initialized and started (%lu Hz, IRQ %d)\n", (long unsigned)gt_rate, timer_irq);
// setup a GPIO
pwm_setup_pin(38);
pwm_data_ptr.pin = 38;
set_pwm_dutycycle(1,150);
// return success
return 0;
}
