2 * Broadcom specific AMBA
3 * ChipCommon core driver
5 * Copyright 2005, Broadcom Corporation
9 * Licensed under the GNU/GPL. See COPYING for details.
12 #include "bcma_private.h"
13 #include <linux/bcm47xx_wdt.h>
14 #include <linux/export.h>
15 #include <linux/platform_device.h>
16 #include <linux/bcma/bcma.h>
18 static inline u32 bcma_cc_write32_masked(struct bcma_drv_cc *cc, u16 offset,
22 value |= bcma_cc_read32(cc, offset) & ~mask;
23 bcma_cc_write32(cc, offset, value);
28 u32 bcma_chipco_get_alp_clock(struct bcma_drv_cc *cc)
30 if (cc->capabilities & BCMA_CC_CAP_PMU)
31 return bcma_pmu_get_alp_clock(cc);
35 EXPORT_SYMBOL_GPL(bcma_chipco_get_alp_clock);
37 static u32 bcma_chipco_watchdog_get_max_timer(struct bcma_drv_cc *cc)
39 struct bcma_bus *bus = cc->core->bus;
42 if (cc->capabilities & BCMA_CC_CAP_PMU) {
43 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
45 else if (cc->core->id.rev < 26)
48 nb = (cc->core->id.rev >= 37) ? 32 : 24;
58 static u32 bcma_chipco_watchdog_timer_set_wdt(struct bcm47xx_wdt *wdt,
61 struct bcma_drv_cc *cc = bcm47xx_wdt_get_drvdata(wdt);
63 return bcma_chipco_watchdog_timer_set(cc, ticks);
66 static u32 bcma_chipco_watchdog_timer_set_ms_wdt(struct bcm47xx_wdt *wdt,
69 struct bcma_drv_cc *cc = bcm47xx_wdt_get_drvdata(wdt);
72 ticks = bcma_chipco_watchdog_timer_set(cc, cc->ticks_per_ms * ms);
73 return ticks / cc->ticks_per_ms;
76 static int bcma_chipco_watchdog_ticks_per_ms(struct bcma_drv_cc *cc)
78 struct bcma_bus *bus = cc->core->bus;
80 if (cc->capabilities & BCMA_CC_CAP_PMU) {
81 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
82 /* 4706 CC and PMU watchdogs are clocked at 1/4 of ALP
85 return bcma_chipco_get_alp_clock(cc) / 4000;
87 /* based on 32KHz ILP clock */
90 return bcma_chipco_get_alp_clock(cc) / 1000;
94 int bcma_chipco_watchdog_register(struct bcma_drv_cc *cc)
96 struct bcm47xx_wdt wdt = {};
97 struct platform_device *pdev;
100 wdt.timer_set = bcma_chipco_watchdog_timer_set_wdt;
101 wdt.timer_set_ms = bcma_chipco_watchdog_timer_set_ms_wdt;
103 bcma_chipco_watchdog_get_max_timer(cc) / cc->ticks_per_ms;
105 pdev = platform_device_register_data(NULL, "bcm47xx-wdt",
106 cc->core->bus->num, &wdt,
109 return PTR_ERR(pdev);
116 void bcma_core_chipcommon_early_init(struct bcma_drv_cc *cc)
118 if (cc->early_setup_done)
121 spin_lock_init(&cc->gpio_lock);
123 if (cc->core->id.rev >= 11)
124 cc->status = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
125 cc->capabilities = bcma_cc_read32(cc, BCMA_CC_CAP);
126 if (cc->core->id.rev >= 35)
127 cc->capabilities_ext = bcma_cc_read32(cc, BCMA_CC_CAP_EXT);
129 if (cc->capabilities & BCMA_CC_CAP_PMU)
130 bcma_pmu_early_init(cc);
132 cc->early_setup_done = true;
135 void bcma_core_chipcommon_init(struct bcma_drv_cc *cc)
143 bcma_core_chipcommon_early_init(cc);
145 if (cc->core->id.rev >= 20) {
146 u32 pullup = 0, pulldown = 0;
148 if (cc->core->bus->chipinfo.id == BCMA_CHIP_ID_BCM43142) {
153 bcma_cc_write32(cc, BCMA_CC_GPIOPULLUP, pullup);
154 bcma_cc_write32(cc, BCMA_CC_GPIOPULLDOWN, pulldown);
157 if (cc->capabilities & BCMA_CC_CAP_PMU)
159 if (cc->capabilities & BCMA_CC_CAP_PCTL)
160 bcma_err(cc->core->bus, "Power control not implemented!\n");
162 if (cc->core->id.rev >= 16) {
163 if (cc->core->bus->sprom.leddc_on_time &&
164 cc->core->bus->sprom.leddc_off_time) {
165 leddc_on = cc->core->bus->sprom.leddc_on_time;
166 leddc_off = cc->core->bus->sprom.leddc_off_time;
168 bcma_cc_write32(cc, BCMA_CC_GPIOTIMER,
169 ((leddc_on << BCMA_CC_GPIOTIMER_ONTIME_SHIFT) |
170 (leddc_off << BCMA_CC_GPIOTIMER_OFFTIME_SHIFT)));
172 cc->ticks_per_ms = bcma_chipco_watchdog_ticks_per_ms(cc);
174 cc->setup_done = true;
177 /* Set chip watchdog reset timer to fire in 'ticks' backplane cycles */
178 u32 bcma_chipco_watchdog_timer_set(struct bcma_drv_cc *cc, u32 ticks)
182 maxt = bcma_chipco_watchdog_get_max_timer(cc);
183 if (cc->capabilities & BCMA_CC_CAP_PMU) {
186 else if (ticks > maxt)
188 bcma_cc_write32(cc, BCMA_CC_PMU_WATCHDOG, ticks);
190 struct bcma_bus *bus = cc->core->bus;
192 if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4707 &&
193 bus->chipinfo.id != BCMA_CHIP_ID_BCM53018)
194 bcma_core_set_clockmode(cc->core,
195 ticks ? BCMA_CLKMODE_FAST : BCMA_CLKMODE_DYNAMIC);
200 bcma_cc_write32(cc, BCMA_CC_WATCHDOG, ticks);
205 void bcma_chipco_irq_mask(struct bcma_drv_cc *cc, u32 mask, u32 value)
207 bcma_cc_write32_masked(cc, BCMA_CC_IRQMASK, mask, value);
210 u32 bcma_chipco_irq_status(struct bcma_drv_cc *cc, u32 mask)
212 return bcma_cc_read32(cc, BCMA_CC_IRQSTAT) & mask;
215 u32 bcma_chipco_gpio_in(struct bcma_drv_cc *cc, u32 mask)
217 return bcma_cc_read32(cc, BCMA_CC_GPIOIN) & mask;
220 u32 bcma_chipco_gpio_out(struct bcma_drv_cc *cc, u32 mask, u32 value)
225 spin_lock_irqsave(&cc->gpio_lock, flags);
226 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUT, mask, value);
227 spin_unlock_irqrestore(&cc->gpio_lock, flags);
231 EXPORT_SYMBOL_GPL(bcma_chipco_gpio_out);
233 u32 bcma_chipco_gpio_outen(struct bcma_drv_cc *cc, u32 mask, u32 value)
238 spin_lock_irqsave(&cc->gpio_lock, flags);
239 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUTEN, mask, value);
240 spin_unlock_irqrestore(&cc->gpio_lock, flags);
244 EXPORT_SYMBOL_GPL(bcma_chipco_gpio_outen);
247 * If the bit is set to 0, chipcommon controlls this GPIO,
248 * if the bit is set to 1, it is used by some part of the chip and not our code.
250 u32 bcma_chipco_gpio_control(struct bcma_drv_cc *cc, u32 mask, u32 value)
255 spin_lock_irqsave(&cc->gpio_lock, flags);
256 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOCTL, mask, value);
257 spin_unlock_irqrestore(&cc->gpio_lock, flags);
261 EXPORT_SYMBOL_GPL(bcma_chipco_gpio_control);
263 u32 bcma_chipco_gpio_intmask(struct bcma_drv_cc *cc, u32 mask, u32 value)
268 spin_lock_irqsave(&cc->gpio_lock, flags);
269 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOIRQ, mask, value);
270 spin_unlock_irqrestore(&cc->gpio_lock, flags);
275 u32 bcma_chipco_gpio_polarity(struct bcma_drv_cc *cc, u32 mask, u32 value)
280 spin_lock_irqsave(&cc->gpio_lock, flags);
281 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOPOL, mask, value);
282 spin_unlock_irqrestore(&cc->gpio_lock, flags);
287 u32 bcma_chipco_gpio_pullup(struct bcma_drv_cc *cc, u32 mask, u32 value)
292 if (cc->core->id.rev < 20)
295 spin_lock_irqsave(&cc->gpio_lock, flags);
296 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOPULLUP, mask, value);
297 spin_unlock_irqrestore(&cc->gpio_lock, flags);
302 u32 bcma_chipco_gpio_pulldown(struct bcma_drv_cc *cc, u32 mask, u32 value)
307 if (cc->core->id.rev < 20)
310 spin_lock_irqsave(&cc->gpio_lock, flags);
311 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOPULLDOWN, mask, value);
312 spin_unlock_irqrestore(&cc->gpio_lock, flags);
317 #ifdef CONFIG_BCMA_DRIVER_MIPS
318 void bcma_chipco_serial_init(struct bcma_drv_cc *cc)
323 unsigned int ccrev = cc->core->id.rev;
324 struct bcma_serial_port *ports = cc->serial_ports;
326 if (ccrev >= 11 && ccrev != 15) {
327 baud_base = bcma_chipco_get_alp_clock(cc);
329 /* Turn off UART clock before switching clocksource. */
330 bcma_cc_write32(cc, BCMA_CC_CORECTL,
331 bcma_cc_read32(cc, BCMA_CC_CORECTL)
332 & ~BCMA_CC_CORECTL_UARTCLKEN);
334 /* Set the override bit so we don't divide it */
335 bcma_cc_write32(cc, BCMA_CC_CORECTL,
336 bcma_cc_read32(cc, BCMA_CC_CORECTL)
337 | BCMA_CC_CORECTL_UARTCLK0);
339 /* Re-enable the UART clock. */
340 bcma_cc_write32(cc, BCMA_CC_CORECTL,
341 bcma_cc_read32(cc, BCMA_CC_CORECTL)
342 | BCMA_CC_CORECTL_UARTCLKEN);
345 bcma_err(cc->core->bus, "serial not supported on this device ccrev: 0x%x\n",
350 irq = bcma_core_irq(cc->core, 0);
352 /* Determine the registers of the UARTs */
353 cc->nr_serial_ports = (cc->capabilities & BCMA_CC_CAP_NRUART);
354 for (i = 0; i < cc->nr_serial_ports; i++) {
355 ports[i].regs = cc->core->io_addr + BCMA_CC_UART0_DATA +
358 ports[i].baud_base = baud_base;
359 ports[i].reg_shift = 0;
362 #endif /* CONFIG_BCMA_DRIVER_MIPS */