2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2018 Emmanuel Vadot <manu@freebsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/systm.h>
38 #include <dev/extres/clk/clk.h>
40 #include <arm64/rockchip/clk/rk_clk_pll.h>
42 #include "clkdev_if.h"
44 struct rk_clk_pll_sc {
55 struct rk_clk_pll_rate *rates;
56 struct rk_clk_pll_rate *frac_rates;
59 #define WRITE4(_clk, off, val) \
60 CLKDEV_WRITE_4(clknode_get_device(_clk), off, val)
61 #define READ4(_clk, off, val) \
62 CLKDEV_READ_4(clknode_get_device(_clk), off, val)
63 #define DEVICE_LOCK(_clk) \
64 CLKDEV_DEVICE_LOCK(clknode_get_device(_clk))
65 #define DEVICE_UNLOCK(_clk) \
66 CLKDEV_DEVICE_UNLOCK(clknode_get_device(_clk))
68 #define RK_CLK_PLL_FBDIV_OFFSET 0
69 #define RK_CLK_PLL_FBDIV_SHIFT 0
70 #define RK_CLK_PLL_FBDIV_MASK 0xFFF
72 #define RK_CLK_PLL_POSTDIV1_OFFSET 0
73 #define RK_CLK_PLL_POSTDIV1_SHIFT 12
74 #define RK_CLK_PLL_POSTDIV1_MASK 0x7000
76 #define RK_CLK_PLL_DSMPD_OFFSET 4
77 #define RK_CLK_PLL_DSMPD_SHIFT 12
78 #define RK_CLK_PLL_DSMPD_MASK 0x1000
80 #define RK_CLK_PLL_REFDIV_OFFSET 4
81 #define RK_CLK_PLL_REFDIV_SHIFT 0
82 #define RK_CLK_PLL_REFDIV_MASK 0x3F
84 #define RK_CLK_PLL_POSTDIV2_OFFSET 4
85 #define RK_CLK_PLL_POSTDIV2_SHIFT 6
86 #define RK_CLK_PLL_POSTDIV2_MASK 0x1C0
88 #define RK_CLK_PLL_FRAC_OFFSET 8
89 #define RK_CLK_PLL_FRAC_SHIFT 0
90 #define RK_CLK_PLL_FRAC_MASK 0xFFFFFF
92 #define RK_CLK_PLL_LOCK_MASK 0x400
94 #define RK_CLK_PLL_WRITE_MASK 0xFFFF0000
97 rk_clk_pll_init(struct clknode *clk, device_t dev)
99 struct rk_clk_pll_sc *sc;
101 sc = clknode_get_softc(clk);
103 clknode_init_parent_idx(clk, 0);
109 rk_clk_pll_set_gate(struct clknode *clk, bool enable)
111 struct rk_clk_pll_sc *sc;
114 sc = clknode_get_softc(clk);
116 if ((sc->flags & RK_CLK_PLL_HAVE_GATE) == 0)
120 READ4(clk, sc->gate_offset, &val);
122 val &= ~(1 << sc->gate_shift);
124 val |= 1 << sc->gate_shift;
125 WRITE4(clk, sc->gate_offset, val | RK_CLK_PLL_MASK);
132 rk_clk_pll_recalc(struct clknode *clk, uint64_t *freq)
134 struct rk_clk_pll_sc *sc;
136 uint32_t dsmpd, refdiv, fbdiv;
137 uint32_t postdiv1, postdiv2, frac;
138 uint32_t raw1, raw2, raw3;
140 sc = clknode_get_softc(clk);
144 READ4(clk, sc->base_offset, &raw1);
145 READ4(clk, sc->base_offset + 4, &raw2);
146 READ4(clk, sc->base_offset + 8, &raw3);
148 fbdiv = (raw1 & RK_CLK_PLL_FBDIV_MASK) >> RK_CLK_PLL_FBDIV_SHIFT;
149 postdiv1 = (raw1 & RK_CLK_PLL_POSTDIV1_MASK) >> RK_CLK_PLL_POSTDIV1_SHIFT;
151 dsmpd = (raw2 & RK_CLK_PLL_DSMPD_MASK) >> RK_CLK_PLL_DSMPD_SHIFT;
152 refdiv = (raw2 & RK_CLK_PLL_REFDIV_MASK) >> RK_CLK_PLL_REFDIV_SHIFT;
153 postdiv2 = (raw2 & RK_CLK_PLL_POSTDIV2_MASK) >> RK_CLK_PLL_POSTDIV2_SHIFT;
155 frac = (raw3 & RK_CLK_PLL_FRAC_MASK) >> RK_CLK_PLL_FRAC_SHIFT;
159 rate = *freq * fbdiv / refdiv;
161 /* Fractional mode */
164 frac_rate = *freq * frac / refdiv;
165 rate += frac_rate >> 24;
168 *freq = rate / postdiv1 / postdiv2;
177 rk_clk_pll_set_freq(struct clknode *clk, uint64_t fparent, uint64_t *fout,
178 int flags, int *stop)
180 struct rk_clk_pll_rate *rates;
181 struct rk_clk_pll_sc *sc;
185 sc = clknode_get_softc(clk);
189 else if (sc->frac_rates)
190 rates = sc->frac_rates;
194 for (; rates->freq; rates++) {
195 if (rates->freq == *fout)
198 if (rates->freq == 0) {
205 /* Setting postdiv1 and fbdiv */
206 READ4(clk, sc->base_offset, ®);
207 reg &= ~(RK_CLK_PLL_POSTDIV1_MASK | RK_CLK_PLL_FBDIV_MASK);
208 reg |= rates->postdiv1 << RK_CLK_PLL_POSTDIV1_SHIFT;
209 reg |= rates->fbdiv << RK_CLK_PLL_FBDIV_SHIFT;
210 WRITE4(clk, sc->base_offset, reg | RK_CLK_PLL_WRITE_MASK);
212 /* Setting dsmpd, postdiv2 and refdiv */
213 READ4(clk, sc->base_offset + 0x4, ®);
214 reg &= ~(RK_CLK_PLL_DSMPD_MASK | RK_CLK_PLL_POSTDIV2_MASK |
215 RK_CLK_PLL_REFDIV_MASK);
216 reg |= rates->dsmpd << RK_CLK_PLL_DSMPD_SHIFT;
217 reg |= rates->postdiv2 << RK_CLK_PLL_POSTDIV2_SHIFT;
218 reg |= rates->refdiv << RK_CLK_PLL_REFDIV_SHIFT;
219 WRITE4(clk, sc->base_offset + 0x4, reg | RK_CLK_PLL_WRITE_MASK);
222 READ4(clk, sc->base_offset + 0x8, ®);
223 reg &= ~RK_CLK_PLL_FRAC_MASK;
224 reg |= rates->frac << RK_CLK_PLL_FRAC_SHIFT;
225 WRITE4(clk, sc->base_offset + 0x8, reg);
227 /* Setting to normal mode */
228 READ4(clk, sc->mode_reg, ®);
229 reg |= sc->mode_val << 16 | sc->mode_val;
230 WRITE4(clk, sc->mode_reg, reg);
233 for (timeout = 1000; timeout; timeout--) {
234 READ4(clk, sc->base_offset + 0x4, ®);
235 if ((reg & RK_CLK_PLL_LOCK_MASK) == 0)
246 static clknode_method_t rk_clk_pll_clknode_methods[] = {
247 /* Device interface */
248 CLKNODEMETHOD(clknode_init, rk_clk_pll_init),
249 CLKNODEMETHOD(clknode_set_gate, rk_clk_pll_set_gate),
250 CLKNODEMETHOD(clknode_recalc_freq, rk_clk_pll_recalc),
251 CLKNODEMETHOD(clknode_set_freq, rk_clk_pll_set_freq),
255 DEFINE_CLASS_1(rk_clk_pll_clknode, rk_clk_pll_clknode_class,
256 rk_clk_pll_clknode_methods, sizeof(struct rk_clk_pll_sc), clknode_class);
259 rk_clk_pll_register(struct clkdom *clkdom, struct rk_clk_pll_def *clkdef)
262 struct rk_clk_pll_sc *sc;
264 clk = clknode_create(clkdom, &rk_clk_pll_clknode_class,
269 sc = clknode_get_softc(clk);
271 sc->base_offset = clkdef->base_offset;
272 sc->gate_offset = clkdef->gate_offset;
273 sc->gate_shift = clkdef->gate_shift;
274 sc->mode_reg = clkdef->mode_reg;
275 sc->mode_val = clkdef->mode_val;
276 sc->flags = clkdef->flags;
277 sc->rates = clkdef->rates;
278 sc->frac_rates = clkdef->frac_rates;
280 clknode_register(clkdom, clk);