*
* Copyright 2005, Broadcom Corporation
* Copyright 2006, 2007, Michael Buesch <m@bues.ch>
+ * Copyright 2012, Hauke Mehrtens <hauke@hauke-m.de>
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include <linux/ssb/ssb_regs.h>
#include <linux/export.h>
#include <linux/pci.h>
+#include <linux/bcm47xx_wdt.h>
#include "ssb_private.h"
cc->fast_pwrup_delay = tmp;
}
+static u32 ssb_chipco_alp_clock(struct ssb_chipcommon *cc)
+{
+ if (cc->capabilities & SSB_CHIPCO_CAP_PMU)
+ return ssb_pmu_get_alp_clock(cc);
+
+ return 20000000;
+}
+
+static u32 ssb_chipco_watchdog_get_max_timer(struct ssb_chipcommon *cc)
+{
+ u32 nb;
+
+ if (cc->capabilities & SSB_CHIPCO_CAP_PMU) {
+ if (cc->dev->id.revision < 26)
+ nb = 16;
+ else
+ nb = (cc->dev->id.revision >= 37) ? 32 : 24;
+ } else {
+ nb = 28;
+ }
+ if (nb == 32)
+ return 0xffffffff;
+ else
+ return (1 << nb) - 1;
+}
+
+u32 ssb_chipco_watchdog_timer_set_wdt(struct bcm47xx_wdt *wdt, u32 ticks)
+{
+ struct ssb_chipcommon *cc = bcm47xx_wdt_get_drvdata(wdt);
+
+ if (cc->dev->bus->bustype != SSB_BUSTYPE_SSB)
+ return 0;
+
+ return ssb_chipco_watchdog_timer_set(cc, ticks);
+}
+
+u32 ssb_chipco_watchdog_timer_set_ms(struct bcm47xx_wdt *wdt, u32 ms)
+{
+ struct ssb_chipcommon *cc = bcm47xx_wdt_get_drvdata(wdt);
+ u32 ticks;
+
+ if (cc->dev->bus->bustype != SSB_BUSTYPE_SSB)
+ return 0;
+
+ ticks = ssb_chipco_watchdog_timer_set(cc, cc->ticks_per_ms * ms);
+ return ticks / cc->ticks_per_ms;
+}
+
+static int ssb_chipco_watchdog_ticks_per_ms(struct ssb_chipcommon *cc)
+{
+ struct ssb_bus *bus = cc->dev->bus;
+
+ if (cc->capabilities & SSB_CHIPCO_CAP_PMU) {
+ /* based on 32KHz ILP clock */
+ return 32;
+ } else {
+ if (cc->dev->id.revision < 18)
+ return ssb_clockspeed(bus) / 1000;
+ else
+ return ssb_chipco_alp_clock(cc) / 1000;
+ }
+}
+
void ssb_chipcommon_init(struct ssb_chipcommon *cc)
{
if (!cc->dev)
return; /* We don't have a ChipCommon */
+
+ spin_lock_init(&cc->gpio_lock);
+
if (cc->dev->id.revision >= 11)
cc->status = chipco_read32(cc, SSB_CHIPCO_CHIPSTAT);
ssb_dprintk(KERN_INFO PFX "chipcommon status is 0x%x\n", cc->status);
chipco_powercontrol_init(cc);
ssb_chipco_set_clockmode(cc, SSB_CLKMODE_FAST);
calc_fast_powerup_delay(cc);
+
+ if (cc->dev->bus->bustype == SSB_BUSTYPE_SSB) {
+ cc->ticks_per_ms = ssb_chipco_watchdog_ticks_per_ms(cc);
+ cc->max_timer_ms = ssb_chipco_watchdog_get_max_timer(cc) / cc->ticks_per_ms;
+ }
}
void ssb_chipco_suspend(struct ssb_chipcommon *cc)
}
/* Set chip watchdog reset timer to fire in 'ticks' backplane cycles */
-void ssb_chipco_watchdog_timer_set(struct ssb_chipcommon *cc, u32 ticks)
+u32 ssb_chipco_watchdog_timer_set(struct ssb_chipcommon *cc, u32 ticks)
{
- /* instant NMI */
- chipco_write32(cc, SSB_CHIPCO_WATCHDOG, ticks);
+ u32 maxt;
+ enum ssb_clkmode clkmode;
+
+ maxt = ssb_chipco_watchdog_get_max_timer(cc);
+ if (cc->capabilities & SSB_CHIPCO_CAP_PMU) {
+ if (ticks == 1)
+ ticks = 2;
+ else if (ticks > maxt)
+ ticks = maxt;
+ chipco_write32(cc, SSB_CHIPCO_PMU_WATCHDOG, ticks);
+ } else {
+ clkmode = ticks ? SSB_CLKMODE_FAST : SSB_CLKMODE_DYNAMIC;
+ ssb_chipco_set_clockmode(cc, clkmode);
+ if (ticks > maxt)
+ ticks = maxt;
+ /* instant NMI */
+ chipco_write32(cc, SSB_CHIPCO_WATCHDOG, ticks);
+ }
+ return ticks;
}
void ssb_chipco_irq_mask(struct ssb_chipcommon *cc, u32 mask, u32 value)
u32 ssb_chipco_gpio_out(struct ssb_chipcommon *cc, u32 mask, u32 value)
{
- return chipco_write32_masked(cc, SSB_CHIPCO_GPIOOUT, mask, value);
+ unsigned long flags;
+ u32 res = 0;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = chipco_write32_masked(cc, SSB_CHIPCO_GPIOOUT, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
}
u32 ssb_chipco_gpio_outen(struct ssb_chipcommon *cc, u32 mask, u32 value)
{
- return chipco_write32_masked(cc, SSB_CHIPCO_GPIOOUTEN, mask, value);
+ unsigned long flags;
+ u32 res = 0;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = chipco_write32_masked(cc, SSB_CHIPCO_GPIOOUTEN, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
}
u32 ssb_chipco_gpio_control(struct ssb_chipcommon *cc, u32 mask, u32 value)
{
- return chipco_write32_masked(cc, SSB_CHIPCO_GPIOCTL, mask, value);
+ unsigned long flags;
+ u32 res = 0;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = chipco_write32_masked(cc, SSB_CHIPCO_GPIOCTL, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
}
EXPORT_SYMBOL(ssb_chipco_gpio_control);
u32 ssb_chipco_gpio_intmask(struct ssb_chipcommon *cc, u32 mask, u32 value)
{
- return chipco_write32_masked(cc, SSB_CHIPCO_GPIOIRQ, mask, value);
+ unsigned long flags;
+ u32 res = 0;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = chipco_write32_masked(cc, SSB_CHIPCO_GPIOIRQ, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
}
u32 ssb_chipco_gpio_polarity(struct ssb_chipcommon *cc, u32 mask, u32 value)
{
- return chipco_write32_masked(cc, SSB_CHIPCO_GPIOPOL, mask, value);
+ unsigned long flags;
+ u32 res = 0;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = chipco_write32_masked(cc, SSB_CHIPCO_GPIOPOL, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
+}
+
+u32 ssb_chipco_gpio_pullup(struct ssb_chipcommon *cc, u32 mask, u32 value)
+{
+ unsigned long flags;
+ u32 res = 0;
+
+ if (cc->dev->id.revision < 20)
+ return 0xffffffff;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = chipco_write32_masked(cc, SSB_CHIPCO_GPIOPULLUP, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
+}
+
+u32 ssb_chipco_gpio_pulldown(struct ssb_chipcommon *cc, u32 mask, u32 value)
+{
+ unsigned long flags;
+ u32 res = 0;
+
+ if (cc->dev->id.revision < 20)
+ return 0xffffffff;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = chipco_write32_masked(cc, SSB_CHIPCO_GPIOPULLDOWN, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
}
#ifdef CONFIG_SSB_SERIAL
chipco_read32(cc, SSB_CHIPCO_CORECTL)
| SSB_CHIPCO_CORECTL_UARTCLK0);
} else if ((ccrev >= 11) && (ccrev != 15)) {
- /* Fixed ALP clock */
- baud_base = 20000000;
- if (cc->capabilities & SSB_CHIPCO_CAP_PMU) {
- /* FIXME: baud_base is different for devices with a PMU */
- SSB_WARN_ON(1);
- }
+ baud_base = ssb_chipco_alp_clock(cc);
div = 1;
if (ccrev >= 21) {
/* Turn off UART clock before switching clocksource. */
projects / firefly-linux-kernel-4.4.55.git / blobdiff