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 static 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);
36 static u32 bcma_chipco_watchdog_get_max_timer(struct bcma_drv_cc *cc)
38 struct bcma_bus *bus = cc->core->bus;
41 if (cc->capabilities & BCMA_CC_CAP_PMU) {
42 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
44 else if (cc->core->id.rev < 26)
47 nb = (cc->core->id.rev >= 37) ? 32 : 24;
57 static u32 bcma_chipco_watchdog_timer_set_wdt(struct bcm47xx_wdt *wdt,
60 struct bcma_drv_cc *cc = bcm47xx_wdt_get_drvdata(wdt);
62 return bcma_chipco_watchdog_timer_set(cc, ticks);
65 static u32 bcma_chipco_watchdog_timer_set_ms_wdt(struct bcm47xx_wdt *wdt,
68 struct bcma_drv_cc *cc = bcm47xx_wdt_get_drvdata(wdt);
71 ticks = bcma_chipco_watchdog_timer_set(cc, cc->ticks_per_ms * ms);
72 return ticks / cc->ticks_per_ms;
75 static int bcma_chipco_watchdog_ticks_per_ms(struct bcma_drv_cc *cc)
77 struct bcma_bus *bus = cc->core->bus;
79 if (cc->capabilities & BCMA_CC_CAP_PMU) {
80 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
81 /* 4706 CC and PMU watchdogs are clocked at 1/4 of ALP clock */
82 return bcma_chipco_get_alp_clock(cc) / 4000;
84 /* based on 32KHz ILP clock */
87 return bcma_chipco_get_alp_clock(cc) / 1000;
91 int bcma_chipco_watchdog_register(struct bcma_drv_cc *cc)
93 struct bcm47xx_wdt wdt = {};
94 struct platform_device *pdev;
97 wdt.timer_set = bcma_chipco_watchdog_timer_set_wdt;
98 wdt.timer_set_ms = bcma_chipco_watchdog_timer_set_ms_wdt;
99 wdt.max_timer_ms = bcma_chipco_watchdog_get_max_timer(cc) / cc->ticks_per_ms;
101 pdev = platform_device_register_data(NULL, "bcm47xx-wdt",
102 cc->core->bus->num, &wdt,
105 return PTR_ERR(pdev);
112 void bcma_core_chipcommon_early_init(struct bcma_drv_cc *cc)
114 if (cc->early_setup_done)
117 spin_lock_init(&cc->gpio_lock);
119 if (cc->core->id.rev >= 11)
120 cc->status = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
121 cc->capabilities = bcma_cc_read32(cc, BCMA_CC_CAP);
122 if (cc->core->id.rev >= 35)
123 cc->capabilities_ext = bcma_cc_read32(cc, BCMA_CC_CAP_EXT);
125 if (cc->capabilities & BCMA_CC_CAP_PMU)
126 bcma_pmu_early_init(cc);
128 cc->early_setup_done = true;
131 void bcma_core_chipcommon_init(struct bcma_drv_cc *cc)
139 bcma_core_chipcommon_early_init(cc);
141 if (cc->core->id.rev >= 20) {
142 bcma_cc_write32(cc, BCMA_CC_GPIOPULLUP, 0);
143 bcma_cc_write32(cc, BCMA_CC_GPIOPULLDOWN, 0);
146 if (cc->capabilities & BCMA_CC_CAP_PMU)
148 if (cc->capabilities & BCMA_CC_CAP_PCTL)
149 bcma_err(cc->core->bus, "Power control not implemented!\n");
151 if (cc->core->id.rev >= 16) {
152 if (cc->core->bus->sprom.leddc_on_time &&
153 cc->core->bus->sprom.leddc_off_time) {
154 leddc_on = cc->core->bus->sprom.leddc_on_time;
155 leddc_off = cc->core->bus->sprom.leddc_off_time;
157 bcma_cc_write32(cc, BCMA_CC_GPIOTIMER,
158 ((leddc_on << BCMA_CC_GPIOTIMER_ONTIME_SHIFT) |
159 (leddc_off << BCMA_CC_GPIOTIMER_OFFTIME_SHIFT)));
161 cc->ticks_per_ms = bcma_chipco_watchdog_ticks_per_ms(cc);
163 cc->setup_done = true;
166 /* Set chip watchdog reset timer to fire in 'ticks' backplane cycles */
167 u32 bcma_chipco_watchdog_timer_set(struct bcma_drv_cc *cc, u32 ticks)
170 enum bcma_clkmode clkmode;
172 maxt = bcma_chipco_watchdog_get_max_timer(cc);
173 if (cc->capabilities & BCMA_CC_CAP_PMU) {
176 else if (ticks > maxt)
178 bcma_cc_write32(cc, BCMA_CC_PMU_WATCHDOG, ticks);
180 clkmode = ticks ? BCMA_CLKMODE_FAST : BCMA_CLKMODE_DYNAMIC;
181 bcma_core_set_clockmode(cc->core, clkmode);
185 bcma_cc_write32(cc, BCMA_CC_WATCHDOG, ticks);
190 void bcma_chipco_irq_mask(struct bcma_drv_cc *cc, u32 mask, u32 value)
192 bcma_cc_write32_masked(cc, BCMA_CC_IRQMASK, mask, value);
195 u32 bcma_chipco_irq_status(struct bcma_drv_cc *cc, u32 mask)
197 return bcma_cc_read32(cc, BCMA_CC_IRQSTAT) & mask;
200 u32 bcma_chipco_gpio_in(struct bcma_drv_cc *cc, u32 mask)
202 return bcma_cc_read32(cc, BCMA_CC_GPIOIN) & mask;
205 u32 bcma_chipco_gpio_out(struct bcma_drv_cc *cc, u32 mask, u32 value)
210 spin_lock_irqsave(&cc->gpio_lock, flags);
211 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUT, mask, value);
212 spin_unlock_irqrestore(&cc->gpio_lock, flags);
217 u32 bcma_chipco_gpio_outen(struct bcma_drv_cc *cc, u32 mask, u32 value)
222 spin_lock_irqsave(&cc->gpio_lock, flags);
223 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUTEN, mask, value);
224 spin_unlock_irqrestore(&cc->gpio_lock, flags);
230 * If the bit is set to 0, chipcommon controlls this GPIO,
231 * if the bit is set to 1, it is used by some part of the chip and not our code.
233 u32 bcma_chipco_gpio_control(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_GPIOCTL, mask, value);
240 spin_unlock_irqrestore(&cc->gpio_lock, flags);
244 EXPORT_SYMBOL_GPL(bcma_chipco_gpio_control);
246 u32 bcma_chipco_gpio_intmask(struct bcma_drv_cc *cc, u32 mask, u32 value)
251 spin_lock_irqsave(&cc->gpio_lock, flags);
252 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOIRQ, mask, value);
253 spin_unlock_irqrestore(&cc->gpio_lock, flags);
258 u32 bcma_chipco_gpio_polarity(struct bcma_drv_cc *cc, u32 mask, u32 value)
263 spin_lock_irqsave(&cc->gpio_lock, flags);
264 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOPOL, mask, value);
265 spin_unlock_irqrestore(&cc->gpio_lock, flags);
270 u32 bcma_chipco_gpio_pullup(struct bcma_drv_cc *cc, u32 mask, u32 value)
275 if (cc->core->id.rev < 20)
278 spin_lock_irqsave(&cc->gpio_lock, flags);
279 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOPULLUP, mask, value);
280 spin_unlock_irqrestore(&cc->gpio_lock, flags);
285 u32 bcma_chipco_gpio_pulldown(struct bcma_drv_cc *cc, u32 mask, u32 value)
290 if (cc->core->id.rev < 20)
293 spin_lock_irqsave(&cc->gpio_lock, flags);
294 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOPULLDOWN, mask, value);
295 spin_unlock_irqrestore(&cc->gpio_lock, flags);
300 #ifdef CONFIG_BCMA_DRIVER_MIPS
301 void bcma_chipco_serial_init(struct bcma_drv_cc *cc)
306 unsigned int ccrev = cc->core->id.rev;
307 struct bcma_serial_port *ports = cc->serial_ports;
309 if (ccrev >= 11 && ccrev != 15) {
310 baud_base = bcma_chipco_get_alp_clock(cc);
312 /* Turn off UART clock before switching clocksource. */
313 bcma_cc_write32(cc, BCMA_CC_CORECTL,
314 bcma_cc_read32(cc, BCMA_CC_CORECTL)
315 & ~BCMA_CC_CORECTL_UARTCLKEN);
317 /* Set the override bit so we don't divide it */
318 bcma_cc_write32(cc, BCMA_CC_CORECTL,
319 bcma_cc_read32(cc, BCMA_CC_CORECTL)
320 | BCMA_CC_CORECTL_UARTCLK0);
322 /* Re-enable the UART clock. */
323 bcma_cc_write32(cc, BCMA_CC_CORECTL,
324 bcma_cc_read32(cc, BCMA_CC_CORECTL)
325 | BCMA_CC_CORECTL_UARTCLKEN);
328 bcma_err(cc->core->bus, "serial not supported on this device ccrev: 0x%x\n", ccrev);
332 irq = bcma_core_mips_irq(cc->core);
334 /* Determine the registers of the UARTs */
335 cc->nr_serial_ports = (cc->capabilities & BCMA_CC_CAP_NRUART);
336 for (i = 0; i < cc->nr_serial_ports; i++) {
337 ports[i].regs = cc->core->io_addr + BCMA_CC_UART0_DATA +
340 ports[i].baud_base = baud_base;
341 ports[i].reg_shift = 0;
344 #endif /* CONFIG_BCMA_DRIVER_MIPS */