1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
4  * Copyright (c) 2017 Poul-Henning Kamp <phk@FreeBSD.org>
49 	{"broadcom,bcm2835-pwm",	1},
50 	{"brcm,bcm2835-pwm",		1},
73     bus_space_write_4(_sc->sc_m_bst, _sc->sc_m_bsh, _off, _val)
75     bus_space_read_4(_sc->sc_m_bst, _sc->sc_m_bsh, _off)
77     bus_space_write_4(_sc->sc_c_bst, _sc->sc_c_bsh, _off, _val)
79     bus_space_read_4(_sc->sc_c_bst, _sc->sc_c_bsh, _off)
103 	(void)bcm2835_clkman_set_frequency(sc->clkman, BCM_PWM_CLKSRC, 0);  in bcm_pwm_reconf()
105 	ctlr = 0; /* pre-assign zero, enable bits, write to CTL at end */  in bcm_pwm_reconf()
107 	if (sc->mode == 0 && sc->mode2 == 0) /* both modes are zero */  in bcm_pwm_reconf()
108 		return 0; /* device is now off - return */  in bcm_pwm_reconf()
112 	u = bcm2835_clkman_set_frequency(sc->clkman, BCM_PWM_CLKSRC, sc->freq);  in bcm_pwm_reconf()
115 	sc->freq = u;  in bcm_pwm_reconf()
123 	 * 12 POLA2  chan 2 invert polarity (0 normal, 1 inverted polarity)  in bcm_pwm_reconf()
131 	 *  4 POLA1  chan 1 invert polarity (0 normal, 1 inverted polarity)  in bcm_pwm_reconf()
139 	 * defined by 'period'.  So if 'ratio' is 2500 and 'period' is 10000, then the output  in bcm_pwm_reconf()
146 	if (sc->mode != 0) {  in bcm_pwm_reconf()
148 		W_RNG(sc, sc->period);  in bcm_pwm_reconf()
149 		if (sc->ratio > sc->period)  in bcm_pwm_reconf()
150 			sc->ratio = sc->period;  in bcm_pwm_reconf()
151 		W_DAT(sc, sc->ratio);  in bcm_pwm_reconf()
154 		if (sc->mode == 1)  in bcm_pwm_reconf()
160 	if (sc->mode2 != 0) {  in bcm_pwm_reconf()
162 		W_RNG2(sc, sc->period2);  in bcm_pwm_reconf()
163 		if (sc->ratio2 > sc->period2)  in bcm_pwm_reconf()
164 			sc->ratio2 = sc->period2;  in bcm_pwm_reconf()
165 		W_DAT2(sc, sc->ratio2);  in bcm_pwm_reconf()
168 		if (sc->mode2 == 1)  in bcm_pwm_reconf()
188 	if (sc->mode == 1)  in bcm_pwm_pwm_freq_proc()
189 		r = sc->freq / sc->period;  in bcm_pwm_pwm_freq_proc()
204 	r = sc->mode;  in bcm_pwm_mode_proc()
206 	if (error != 0 || req->newptr == NULL)  in bcm_pwm_mode_proc()
210 	sc->mode = r;  in bcm_pwm_mode_proc()
222 	r = sc->freq;  in bcm_pwm_freq_proc()
224 	if (error != 0 || req->newptr == NULL)  in bcm_pwm_freq_proc()
228 	sc->freq = r;  in bcm_pwm_freq_proc()
239 	error = sysctl_handle_int(oidp, &sc->period, sizeof(sc->period), req);  in bcm_pwm_period_proc()
240 	if (error != 0 || req->newptr == NULL)  in bcm_pwm_period_proc()
253 	r = sc->ratio;  in bcm_pwm_ratio_proc()
255 	if (error != 0 || req->newptr == NULL)  in bcm_pwm_ratio_proc()
257 	if (r > sc->period)			// XXX >= ?  in bcm_pwm_ratio_proc()
259 	sc->ratio = r;  in bcm_pwm_ratio_proc()
260 	W_DAT(sc, sc->ratio);  in bcm_pwm_ratio_proc()
272 	if (sc->mode2 == 1)  in bcm_pwm_pwm_freq2_proc()
273 		r = sc->freq / sc->period2;  in bcm_pwm_pwm_freq2_proc()
288 	r = sc->mode2;  in bcm_pwm_mode2_proc()
290 	if (error != 0 || req->newptr == NULL)  in bcm_pwm_mode2_proc()
294 	sc->mode2 = r;  in bcm_pwm_mode2_proc()
305 	error = sysctl_handle_int(oidp, &sc->period2, sizeof(sc->period2), req);  in bcm_pwm_period2_proc()
306 	if (error != 0 || req->newptr == NULL)  in bcm_pwm_period2_proc()
319 	r = sc->ratio2;  in bcm_pwm_ratio2_proc()
321 	if (error != 0 || req->newptr == NULL)  in bcm_pwm_ratio2_proc()
323 	if (r > sc->period2)		// XXX >= ?  in bcm_pwm_ratio2_proc()
325 	sc->ratio2 = r;  in bcm_pwm_ratio2_proc()
326 	W_DAT(sc, sc->ratio2);  in bcm_pwm_ratio2_proc()
341 	if (error != 0 || req->newptr == NULL)  in bcm_pwm_reg_proc()
358 	ctx = device_get_sysctl_ctx(sc->sc_dev);  in bcm_pwm_sysctl_init()
359 	tree_node = device_get_sysctl_tree(sc->sc_dev);  in bcm_pwm_sysctl_init()
415 	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)  in bcm_pwm_probe()
435 	sc->sc_dev = dev;  in bcm_pwm_attach()
437 	sc->clkman = devclass_get_device(devclass_find("bcm2835_clkman"), 0);  in bcm_pwm_attach()
438 	if (sc->clkman == NULL) {  in bcm_pwm_attach()
444 	sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,  in bcm_pwm_attach()
446 	if (!sc->sc_mem_res) {  in bcm_pwm_attach()
451 	sc->sc_m_bst = rman_get_bustag(sc->sc_mem_res);  in bcm_pwm_attach()
452 	sc->sc_m_bsh = rman_get_bushandle(sc->sc_mem_res);  in bcm_pwm_attach()
457 	sc->freq = 125000000; /* 125 Mhz */  in bcm_pwm_attach()
458 	sc->period = 10000;   /* 12.5 khz */  in bcm_pwm_attach()
459 	sc->ratio = 2500;     /* 25% */  in bcm_pwm_attach()
460 	sc->period2 = 10000;  /* 12.5 khz */  in bcm_pwm_attach()
461 	sc->ratio2 = 2500;    /* 25% */  in bcm_pwm_attach()
475 	sc->mode = 0;  in bcm_pwm_detach()
476 	sc->mode2 = 0;  in bcm_pwm_detach()
478 	if (sc->sc_mem_res)  in bcm_pwm_detach()
479 		bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);  in bcm_pwm_detach()