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1/*
2 * Broadcom specific AMBA
3 * ChipCommon core driver
4 *
5 * Copyright 2005, Broadcom Corporation
6 * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
7 *
8 * Licensed under the GNU/GPL. See COPYING for details.
9 */
10
11#include "bcma_private.h"
12#include <linux/bcma/bcma.h>
13
14static inline u32 bcma_cc_write32_masked(struct bcma_drv_cc *cc, u16 offset,
15 u32 mask, u32 value)
16{
17 value &= mask;
18 value |= bcma_cc_read32(cc, offset) & ~mask;
19 bcma_cc_write32(cc, offset, value);
20
21 return value;
22}
23
24void bcma_core_chipcommon_init(struct bcma_drv_cc *cc)
25{
26 u32 leddc_on = 10;
27 u32 leddc_off = 90;
28
29 if (cc->core->id.rev >= 11)
30 cc->status = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
31 cc->capabilities = bcma_cc_read32(cc, BCMA_CC_CAP);
32 if (cc->core->id.rev >= 35)
33 cc->capabilities_ext = bcma_cc_read32(cc, BCMA_CC_CAP_EXT);
34
35 if (cc->core->id.rev >= 20) {
36 bcma_cc_write32(cc, BCMA_CC_GPIOPULLUP, 0);
37 bcma_cc_write32(cc, BCMA_CC_GPIOPULLDOWN, 0);
38 }
39
40 if (cc->capabilities & BCMA_CC_CAP_PMU)
41 bcma_pmu_init(cc);
42 if (cc->capabilities & BCMA_CC_CAP_PCTL)
43 pr_err("Power control not implemented!\n");
44
45 if (cc->core->id.rev >= 16) {
46 if (cc->core->bus->sprom.leddc_on_time &&
47 cc->core->bus->sprom.leddc_off_time) {
48 leddc_on = cc->core->bus->sprom.leddc_on_time;
49 leddc_off = cc->core->bus->sprom.leddc_off_time;
50 }
51 bcma_cc_write32(cc, BCMA_CC_GPIOTIMER,
52 ((leddc_on << BCMA_CC_GPIOTIMER_ONTIME_SHIFT) |
53 (leddc_off << BCMA_CC_GPIOTIMER_OFFTIME_SHIFT)));
54 }
55}
56
57/* Set chip watchdog reset timer to fire in 'ticks' backplane cycles */
58void bcma_chipco_watchdog_timer_set(struct bcma_drv_cc *cc, u32 ticks)
59{
60 /* instant NMI */
61 bcma_cc_write32(cc, BCMA_CC_WATCHDOG, ticks);
62}
63
64void bcma_chipco_irq_mask(struct bcma_drv_cc *cc, u32 mask, u32 value)
65{
66 bcma_cc_write32_masked(cc, BCMA_CC_IRQMASK, mask, value);
67}
68
69u32 bcma_chipco_irq_status(struct bcma_drv_cc *cc, u32 mask)
70{
71 return bcma_cc_read32(cc, BCMA_CC_IRQSTAT) & mask;
72}
73
74u32 bcma_chipco_gpio_in(struct bcma_drv_cc *cc, u32 mask)
75{
76 return bcma_cc_read32(cc, BCMA_CC_GPIOIN) & mask;
77}
78
79u32 bcma_chipco_gpio_out(struct bcma_drv_cc *cc, u32 mask, u32 value)
80{
81 return bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUT, mask, value);
82}
83
84u32 bcma_chipco_gpio_outen(struct bcma_drv_cc *cc, u32 mask, u32 value)
85{
86 return bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUTEN, mask, value);
87}
88
89u32 bcma_chipco_gpio_control(struct bcma_drv_cc *cc, u32 mask, u32 value)
90{
91 return bcma_cc_write32_masked(cc, BCMA_CC_GPIOCTL, mask, value);
92}
93EXPORT_SYMBOL_GPL(bcma_chipco_gpio_control);
94
95u32 bcma_chipco_gpio_intmask(struct bcma_drv_cc *cc, u32 mask, u32 value)
96{
97 return bcma_cc_write32_masked(cc, BCMA_CC_GPIOIRQ, mask, value);
98}
99
100u32 bcma_chipco_gpio_polarity(struct bcma_drv_cc *cc, u32 mask, u32 value)
101{
102 return bcma_cc_write32_masked(cc, BCMA_CC_GPIOPOL, mask, value);
103}
1/*
2 * Broadcom specific AMBA
3 * ChipCommon core driver
4 *
5 * Copyright 2005, Broadcom Corporation
6 * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
7 * Copyright 2012, Hauke Mehrtens <hauke@hauke-m.de>
8 *
9 * Licensed under the GNU/GPL. See COPYING for details.
10 */
11
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>
17
18static inline u32 bcma_cc_write32_masked(struct bcma_drv_cc *cc, u16 offset,
19 u32 mask, u32 value)
20{
21 value &= mask;
22 value |= bcma_cc_read32(cc, offset) & ~mask;
23 bcma_cc_write32(cc, offset, value);
24
25 return value;
26}
27
28u32 bcma_chipco_get_alp_clock(struct bcma_drv_cc *cc)
29{
30 if (cc->capabilities & BCMA_CC_CAP_PMU)
31 return bcma_pmu_get_alp_clock(cc);
32
33 return 20000000;
34}
35EXPORT_SYMBOL_GPL(bcma_chipco_get_alp_clock);
36
37static u32 bcma_chipco_watchdog_get_max_timer(struct bcma_drv_cc *cc)
38{
39 struct bcma_bus *bus = cc->core->bus;
40 u32 nb;
41
42 if (cc->capabilities & BCMA_CC_CAP_PMU) {
43 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
44 nb = 32;
45 else if (cc->core->id.rev < 26)
46 nb = 16;
47 else
48 nb = (cc->core->id.rev >= 37) ? 32 : 24;
49 } else {
50 nb = 28;
51 }
52 if (nb == 32)
53 return 0xffffffff;
54 else
55 return (1 << nb) - 1;
56}
57
58static u32 bcma_chipco_watchdog_timer_set_wdt(struct bcm47xx_wdt *wdt,
59 u32 ticks)
60{
61 struct bcma_drv_cc *cc = bcm47xx_wdt_get_drvdata(wdt);
62
63 return bcma_chipco_watchdog_timer_set(cc, ticks);
64}
65
66static u32 bcma_chipco_watchdog_timer_set_ms_wdt(struct bcm47xx_wdt *wdt,
67 u32 ms)
68{
69 struct bcma_drv_cc *cc = bcm47xx_wdt_get_drvdata(wdt);
70 u32 ticks;
71
72 ticks = bcma_chipco_watchdog_timer_set(cc, cc->ticks_per_ms * ms);
73 return ticks / cc->ticks_per_ms;
74}
75
76static int bcma_chipco_watchdog_ticks_per_ms(struct bcma_drv_cc *cc)
77{
78 struct bcma_bus *bus = cc->core->bus;
79
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 clock */
83 return bcma_chipco_get_alp_clock(cc) / 4000;
84 else
85 /* based on 32KHz ILP clock */
86 return 32;
87 } else {
88 return bcma_chipco_get_alp_clock(cc) / 1000;
89 }
90}
91
92int bcma_chipco_watchdog_register(struct bcma_drv_cc *cc)
93{
94 struct bcm47xx_wdt wdt = {};
95 struct platform_device *pdev;
96
97 wdt.driver_data = cc;
98 wdt.timer_set = bcma_chipco_watchdog_timer_set_wdt;
99 wdt.timer_set_ms = bcma_chipco_watchdog_timer_set_ms_wdt;
100 wdt.max_timer_ms = bcma_chipco_watchdog_get_max_timer(cc) / cc->ticks_per_ms;
101
102 pdev = platform_device_register_data(NULL, "bcm47xx-wdt",
103 cc->core->bus->num, &wdt,
104 sizeof(wdt));
105 if (IS_ERR(pdev))
106 return PTR_ERR(pdev);
107
108 cc->watchdog = pdev;
109
110 return 0;
111}
112
113void bcma_core_chipcommon_early_init(struct bcma_drv_cc *cc)
114{
115 if (cc->early_setup_done)
116 return;
117
118 spin_lock_init(&cc->gpio_lock);
119
120 if (cc->core->id.rev >= 11)
121 cc->status = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
122 cc->capabilities = bcma_cc_read32(cc, BCMA_CC_CAP);
123 if (cc->core->id.rev >= 35)
124 cc->capabilities_ext = bcma_cc_read32(cc, BCMA_CC_CAP_EXT);
125
126 if (cc->capabilities & BCMA_CC_CAP_PMU)
127 bcma_pmu_early_init(cc);
128
129 cc->early_setup_done = true;
130}
131
132void bcma_core_chipcommon_init(struct bcma_drv_cc *cc)
133{
134 u32 leddc_on = 10;
135 u32 leddc_off = 90;
136
137 if (cc->setup_done)
138 return;
139
140 bcma_core_chipcommon_early_init(cc);
141
142 if (cc->core->id.rev >= 20) {
143 u32 pullup = 0, pulldown = 0;
144
145 if (cc->core->bus->chipinfo.id == BCMA_CHIP_ID_BCM43142) {
146 pullup = 0x402e0;
147 pulldown = 0x20500;
148 }
149
150 bcma_cc_write32(cc, BCMA_CC_GPIOPULLUP, pullup);
151 bcma_cc_write32(cc, BCMA_CC_GPIOPULLDOWN, pulldown);
152 }
153
154 if (cc->capabilities & BCMA_CC_CAP_PMU)
155 bcma_pmu_init(cc);
156 if (cc->capabilities & BCMA_CC_CAP_PCTL)
157 bcma_err(cc->core->bus, "Power control not implemented!\n");
158
159 if (cc->core->id.rev >= 16) {
160 if (cc->core->bus->sprom.leddc_on_time &&
161 cc->core->bus->sprom.leddc_off_time) {
162 leddc_on = cc->core->bus->sprom.leddc_on_time;
163 leddc_off = cc->core->bus->sprom.leddc_off_time;
164 }
165 bcma_cc_write32(cc, BCMA_CC_GPIOTIMER,
166 ((leddc_on << BCMA_CC_GPIOTIMER_ONTIME_SHIFT) |
167 (leddc_off << BCMA_CC_GPIOTIMER_OFFTIME_SHIFT)));
168 }
169 cc->ticks_per_ms = bcma_chipco_watchdog_ticks_per_ms(cc);
170
171 cc->setup_done = true;
172}
173
174/* Set chip watchdog reset timer to fire in 'ticks' backplane cycles */
175u32 bcma_chipco_watchdog_timer_set(struct bcma_drv_cc *cc, u32 ticks)
176{
177 u32 maxt;
178 enum bcma_clkmode clkmode;
179
180 maxt = bcma_chipco_watchdog_get_max_timer(cc);
181 if (cc->capabilities & BCMA_CC_CAP_PMU) {
182 if (ticks == 1)
183 ticks = 2;
184 else if (ticks > maxt)
185 ticks = maxt;
186 bcma_cc_write32(cc, BCMA_CC_PMU_WATCHDOG, ticks);
187 } else {
188 clkmode = ticks ? BCMA_CLKMODE_FAST : BCMA_CLKMODE_DYNAMIC;
189 bcma_core_set_clockmode(cc->core, clkmode);
190 if (ticks > maxt)
191 ticks = maxt;
192 /* instant NMI */
193 bcma_cc_write32(cc, BCMA_CC_WATCHDOG, ticks);
194 }
195 return ticks;
196}
197
198void bcma_chipco_irq_mask(struct bcma_drv_cc *cc, u32 mask, u32 value)
199{
200 bcma_cc_write32_masked(cc, BCMA_CC_IRQMASK, mask, value);
201}
202
203u32 bcma_chipco_irq_status(struct bcma_drv_cc *cc, u32 mask)
204{
205 return bcma_cc_read32(cc, BCMA_CC_IRQSTAT) & mask;
206}
207
208u32 bcma_chipco_gpio_in(struct bcma_drv_cc *cc, u32 mask)
209{
210 return bcma_cc_read32(cc, BCMA_CC_GPIOIN) & mask;
211}
212
213u32 bcma_chipco_gpio_out(struct bcma_drv_cc *cc, u32 mask, u32 value)
214{
215 unsigned long flags;
216 u32 res;
217
218 spin_lock_irqsave(&cc->gpio_lock, flags);
219 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUT, mask, value);
220 spin_unlock_irqrestore(&cc->gpio_lock, flags);
221
222 return res;
223}
224EXPORT_SYMBOL_GPL(bcma_chipco_gpio_out);
225
226u32 bcma_chipco_gpio_outen(struct bcma_drv_cc *cc, u32 mask, u32 value)
227{
228 unsigned long flags;
229 u32 res;
230
231 spin_lock_irqsave(&cc->gpio_lock, flags);
232 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUTEN, mask, value);
233 spin_unlock_irqrestore(&cc->gpio_lock, flags);
234
235 return res;
236}
237EXPORT_SYMBOL_GPL(bcma_chipco_gpio_outen);
238
239/*
240 * If the bit is set to 0, chipcommon controlls this GPIO,
241 * if the bit is set to 1, it is used by some part of the chip and not our code.
242 */
243u32 bcma_chipco_gpio_control(struct bcma_drv_cc *cc, u32 mask, u32 value)
244{
245 unsigned long flags;
246 u32 res;
247
248 spin_lock_irqsave(&cc->gpio_lock, flags);
249 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOCTL, mask, value);
250 spin_unlock_irqrestore(&cc->gpio_lock, flags);
251
252 return res;
253}
254EXPORT_SYMBOL_GPL(bcma_chipco_gpio_control);
255
256u32 bcma_chipco_gpio_intmask(struct bcma_drv_cc *cc, u32 mask, u32 value)
257{
258 unsigned long flags;
259 u32 res;
260
261 spin_lock_irqsave(&cc->gpio_lock, flags);
262 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOIRQ, mask, value);
263 spin_unlock_irqrestore(&cc->gpio_lock, flags);
264
265 return res;
266}
267
268u32 bcma_chipco_gpio_polarity(struct bcma_drv_cc *cc, u32 mask, u32 value)
269{
270 unsigned long flags;
271 u32 res;
272
273 spin_lock_irqsave(&cc->gpio_lock, flags);
274 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOPOL, mask, value);
275 spin_unlock_irqrestore(&cc->gpio_lock, flags);
276
277 return res;
278}
279
280u32 bcma_chipco_gpio_pullup(struct bcma_drv_cc *cc, u32 mask, u32 value)
281{
282 unsigned long flags;
283 u32 res;
284
285 if (cc->core->id.rev < 20)
286 return 0;
287
288 spin_lock_irqsave(&cc->gpio_lock, flags);
289 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOPULLUP, mask, value);
290 spin_unlock_irqrestore(&cc->gpio_lock, flags);
291
292 return res;
293}
294
295u32 bcma_chipco_gpio_pulldown(struct bcma_drv_cc *cc, u32 mask, u32 value)
296{
297 unsigned long flags;
298 u32 res;
299
300 if (cc->core->id.rev < 20)
301 return 0;
302
303 spin_lock_irqsave(&cc->gpio_lock, flags);
304 res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOPULLDOWN, mask, value);
305 spin_unlock_irqrestore(&cc->gpio_lock, flags);
306
307 return res;
308}
309
310#ifdef CONFIG_BCMA_DRIVER_MIPS
311void bcma_chipco_serial_init(struct bcma_drv_cc *cc)
312{
313 unsigned int irq;
314 u32 baud_base;
315 u32 i;
316 unsigned int ccrev = cc->core->id.rev;
317 struct bcma_serial_port *ports = cc->serial_ports;
318
319 if (ccrev >= 11 && ccrev != 15) {
320 baud_base = bcma_chipco_get_alp_clock(cc);
321 if (ccrev >= 21) {
322 /* Turn off UART clock before switching clocksource. */
323 bcma_cc_write32(cc, BCMA_CC_CORECTL,
324 bcma_cc_read32(cc, BCMA_CC_CORECTL)
325 & ~BCMA_CC_CORECTL_UARTCLKEN);
326 }
327 /* Set the override bit so we don't divide it */
328 bcma_cc_write32(cc, BCMA_CC_CORECTL,
329 bcma_cc_read32(cc, BCMA_CC_CORECTL)
330 | BCMA_CC_CORECTL_UARTCLK0);
331 if (ccrev >= 21) {
332 /* Re-enable the UART clock. */
333 bcma_cc_write32(cc, BCMA_CC_CORECTL,
334 bcma_cc_read32(cc, BCMA_CC_CORECTL)
335 | BCMA_CC_CORECTL_UARTCLKEN);
336 }
337 } else {
338 bcma_err(cc->core->bus, "serial not supported on this device ccrev: 0x%x\n", ccrev);
339 return;
340 }
341
342 irq = bcma_core_irq(cc->core);
343
344 /* Determine the registers of the UARTs */
345 cc->nr_serial_ports = (cc->capabilities & BCMA_CC_CAP_NRUART);
346 for (i = 0; i < cc->nr_serial_ports; i++) {
347 ports[i].regs = cc->core->io_addr + BCMA_CC_UART0_DATA +
348 (i * 256);
349 ports[i].irq = irq;
350 ports[i].baud_base = baud_base;
351 ports[i].reg_shift = 0;
352 }
353}
354#endif /* CONFIG_BCMA_DRIVER_MIPS */