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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - sound/soc/sh/rcar/adg.c
2a5b3a293cd243db3d4325b5f6a8e2b4e7041611
2 * Helper routines for R-Car sound ADG.
4 * Copyright (C) 2013 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
10 #include <linux/clk-provider.h>
25 #define BRRx_MASK(x) (0x3FF & x)
27 static struct rsnd_mod_ops adg_ops
= {
32 struct clk
*clk
[CLKMAX
];
33 struct clk
*clkout
[CLKOUTMAX
];
34 struct clk_onecell_data onecell
;
37 int rbga_rate_for_441khz
; /* RBGA */
38 int rbgb_rate_for_48khz
; /* RBGB */
41 #define for_each_rsnd_clk(pos, adg, i) \
44 ((pos) = adg->clk[i]); \
46 #define for_each_rsnd_clkout(pos, adg, i) \
49 ((pos) = adg->clkout[i]); \
51 #define rsnd_priv_to_adg(priv) ((struct rsnd_adg *)(priv)->adg)
53 static u32
rsnd_adg_calculate_rbgx(unsigned long div
)
60 for (i
= 3; i
>= 0; i
--) {
62 if (0 == (div
% ratio
))
63 return (u32
)((i
<< 8) | ((div
/ ratio
) - 1));
69 static u32
rsnd_adg_ssi_ws_timing_gen2(struct rsnd_dai_stream
*io
)
71 struct rsnd_mod
*mod
= rsnd_io_to_mod_ssi(io
);
72 int id
= rsnd_mod_id(mod
);
75 if (rsnd_ssi_is_pin_sharing(io
)) {
90 return (0x6 + ws
) << 8;
93 int rsnd_adg_set_cmd_timsel_gen2(struct rsnd_mod
*mod
,
94 struct rsnd_dai_stream
*io
)
96 struct rsnd_priv
*priv
= rsnd_mod_to_priv(mod
);
97 struct rsnd_adg
*adg
= rsnd_priv_to_adg(priv
);
98 struct rsnd_mod
*adg_mod
= rsnd_mod_get(adg
);
99 int id
= rsnd_mod_id(mod
);
100 int shift
= (id
% 2) ? 16 : 0;
103 val
= rsnd_adg_ssi_ws_timing_gen2(io
);
106 mask
= 0xffff << shift
;
108 rsnd_mod_bset(adg_mod
, CMDOUT_TIMSEL
, mask
, val
);
113 static int rsnd_adg_set_src_timsel_gen2(struct rsnd_mod
*src_mod
,
114 struct rsnd_dai_stream
*io
,
117 struct rsnd_priv
*priv
= rsnd_mod_to_priv(src_mod
);
118 struct rsnd_adg
*adg
= rsnd_priv_to_adg(priv
);
119 struct rsnd_mod
*adg_mod
= rsnd_mod_get(adg
);
120 int is_play
= rsnd_io_is_play(io
);
121 int id
= rsnd_mod_id(src_mod
);
122 int shift
= (id
% 2) ? 16 : 0;
126 rsnd_mod_confirm_src(src_mod
);
128 ws
= rsnd_adg_ssi_ws_timing_gen2(io
);
130 in
= (is_play
) ? timsel
: ws
;
131 out
= (is_play
) ? ws
: timsel
;
135 mask
= 0xffff << shift
;
139 rsnd_mod_bset(adg_mod
, SRCIN_TIMSEL0
, mask
, in
);
140 rsnd_mod_bset(adg_mod
, SRCOUT_TIMSEL0
, mask
, out
);
143 rsnd_mod_bset(adg_mod
, SRCIN_TIMSEL1
, mask
, in
);
144 rsnd_mod_bset(adg_mod
, SRCOUT_TIMSEL1
, mask
, out
);
147 rsnd_mod_bset(adg_mod
, SRCIN_TIMSEL2
, mask
, in
);
148 rsnd_mod_bset(adg_mod
, SRCOUT_TIMSEL2
, mask
, out
);
151 rsnd_mod_bset(adg_mod
, SRCIN_TIMSEL3
, mask
, in
);
152 rsnd_mod_bset(adg_mod
, SRCOUT_TIMSEL3
, mask
, out
);
155 rsnd_mod_bset(adg_mod
, SRCIN_TIMSEL4
, mask
, in
);
156 rsnd_mod_bset(adg_mod
, SRCOUT_TIMSEL4
, mask
, out
);
163 int rsnd_adg_set_convert_clk_gen2(struct rsnd_mod
*src_mod
,
164 struct rsnd_dai_stream
*io
,
165 unsigned int src_rate
,
166 unsigned int dst_rate
)
168 struct rsnd_priv
*priv
= rsnd_mod_to_priv(src_mod
);
169 struct rsnd_adg
*adg
= rsnd_priv_to_adg(priv
);
170 struct rsnd_mod
*adg_mod
= rsnd_mod_get(adg
);
171 struct device
*dev
= rsnd_priv_to_dev(priv
);
172 int idx
, sel
, div
, step
, ret
;
174 unsigned int min
, diff
;
175 unsigned int sel_rate
[] = {
176 clk_get_rate(adg
->clk
[CLKA
]), /* 0000: CLKA */
177 clk_get_rate(adg
->clk
[CLKB
]), /* 0001: CLKB */
178 clk_get_rate(adg
->clk
[CLKC
]), /* 0010: CLKC */
179 adg
->rbga_rate_for_441khz
, /* 0011: RBGA */
180 adg
->rbgb_rate_for_48khz
, /* 0100: RBGB */
183 rsnd_mod_confirm_src(src_mod
);
188 for (sel
= 0; sel
< ARRAY_SIZE(sel_rate
); sel
++) {
195 for (div
= 2; div
<= 98304; div
+= step
) {
196 diff
= abs(src_rate
- sel_rate
[sel
] / div
);
198 val
= (sel
<< 8) | idx
;
200 en
= 1 << (sel
+ 1); /* fixme */
204 * step of 0_0000 / 0_0001 / 0_1101
207 if ((idx
> 2) && (idx
% 2))
218 dev_err(dev
, "no Input clock\n");
222 ret
= rsnd_adg_set_src_timsel_gen2(src_mod
, io
, val
);
224 dev_err(dev
, "timsel error\n");
228 rsnd_mod_bset(adg_mod
, DIV_EN
, en
, en
);
230 dev_dbg(dev
, "convert rate %d <-> %d\n", src_rate
, dst_rate
);
235 int rsnd_adg_set_convert_timing_gen2(struct rsnd_mod
*src_mod
,
236 struct rsnd_dai_stream
*io
)
238 u32 val
= rsnd_adg_ssi_ws_timing_gen2(io
);
240 rsnd_mod_confirm_src(src_mod
);
242 return rsnd_adg_set_src_timsel_gen2(src_mod
, io
, val
);
245 int rsnd_adg_set_convert_clk_gen1(struct rsnd_priv
*priv
,
246 struct rsnd_mod
*mod
,
247 unsigned int src_rate
,
248 unsigned int dst_rate
)
250 struct rsnd_adg
*adg
= rsnd_priv_to_adg(priv
);
251 struct rsnd_mod
*adg_mod
= rsnd_mod_get(adg
);
252 struct device
*dev
= rsnd_priv_to_dev(priv
);
253 int idx
, sel
, div
, shift
;
255 int id
= rsnd_mod_id(mod
);
256 unsigned int sel_rate
[] = {
257 clk_get_rate(adg
->clk
[CLKA
]), /* 000: CLKA */
258 clk_get_rate(adg
->clk
[CLKB
]), /* 001: CLKB */
259 clk_get_rate(adg
->clk
[CLKC
]), /* 010: CLKC */
260 0, /* 011: MLBCLK (not used) */
261 adg
->rbga_rate_for_441khz
, /* 100: RBGA */
262 adg
->rbgb_rate_for_48khz
, /* 101: RBGB */
265 /* find div (= 1/128, 1/256, 1/512, 1/1024, 1/2048 */
266 for (sel
= 0; sel
< ARRAY_SIZE(sel_rate
); sel
++) {
267 for (div
= 128, idx
= 0;
270 if (src_rate
== sel_rate
[sel
] / div
) {
271 val
= (idx
<< 4) | sel
;
276 dev_err(dev
, "can't find convert src clk\n");
280 shift
= (id
% 4) * 8;
281 mask
= 0xFF << shift
;
284 dev_dbg(dev
, "adg convert src clk = %02x\n", val
);
288 rsnd_mod_bset(adg_mod
, AUDIO_CLK_SEL3
, mask
, val
);
291 rsnd_mod_bset(adg_mod
, AUDIO_CLK_SEL4
, mask
, val
);
294 rsnd_mod_bset(adg_mod
, AUDIO_CLK_SEL5
, mask
, val
);
299 * Gen1 doesn't need dst_rate settings,
300 * since it uses SSI WS pin.
301 * see also rsnd_src_set_route_if_gen1()
307 static void rsnd_adg_set_ssi_clk(struct rsnd_mod
*ssi_mod
, u32 val
)
309 struct rsnd_priv
*priv
= rsnd_mod_to_priv(ssi_mod
);
310 struct rsnd_adg
*adg
= rsnd_priv_to_adg(priv
);
311 struct rsnd_mod
*adg_mod
= rsnd_mod_get(adg
);
312 int id
= rsnd_mod_id(ssi_mod
);
313 int shift
= (id
% 4) * 8;
314 u32 mask
= 0xFF << shift
;
316 rsnd_mod_confirm_ssi(ssi_mod
);
321 * SSI 8 is not connected to ADG.
322 * it works with SSI 7
329 rsnd_mod_bset(adg_mod
, AUDIO_CLK_SEL0
, mask
, val
);
332 rsnd_mod_bset(adg_mod
, AUDIO_CLK_SEL1
, mask
, val
);
335 rsnd_mod_bset(adg_mod
, AUDIO_CLK_SEL2
, mask
, val
);
340 int rsnd_adg_ssi_clk_stop(struct rsnd_mod
*mod
)
343 * "mod" = "ssi" here.
344 * we can get "ssi id" from mod
346 rsnd_adg_set_ssi_clk(mod
, 0);
351 int rsnd_adg_ssi_clk_try_start(struct rsnd_mod
*mod
, unsigned int rate
)
353 struct rsnd_priv
*priv
= rsnd_mod_to_priv(mod
);
354 struct rsnd_adg
*adg
= rsnd_priv_to_adg(priv
);
355 struct device
*dev
= rsnd_priv_to_dev(priv
);
366 dev_dbg(dev
, "request clock = %d\n", rate
);
369 * find suitable clock from
370 * AUDIO_CLKA/AUDIO_CLKB/AUDIO_CLKC/AUDIO_CLKI.
373 for_each_rsnd_clk(clk
, adg
, i
) {
374 if (rate
== clk_get_rate(clk
)) {
381 * find divided clock from BRGA/BRGB
383 if (rate
== adg
->rbga_rate_for_441khz
) {
388 if (rate
== adg
->rbgb_rate_for_48khz
) {
398 * This "mod" = "ssi" here.
399 * we can get "ssi id" from mod
401 rsnd_adg_set_ssi_clk(mod
, data
);
403 dev_dbg(dev
, "ADG: %s[%d] selects 0x%x for %d\n",
404 rsnd_mod_name(mod
), rsnd_mod_id(mod
),
410 static void rsnd_adg_get_clkin(struct rsnd_priv
*priv
,
411 struct rsnd_adg
*adg
)
413 struct device
*dev
= rsnd_priv_to_dev(priv
);
415 static const char * const clk_name
[] = {
423 for (i
= 0; i
< CLKMAX
; i
++) {
424 clk
= devm_clk_get(dev
, clk_name
[i
]);
425 adg
->clk
[i
] = IS_ERR(clk
) ? NULL
: clk
;
428 for_each_rsnd_clk(clk
, adg
, i
)
429 dev_dbg(dev
, "clk %d : %p : %ld\n", i
, clk
, clk_get_rate(clk
));
432 static void rsnd_adg_get_clkout(struct rsnd_priv
*priv
,
433 struct rsnd_adg
*adg
)
436 struct rsnd_mod
*adg_mod
= rsnd_mod_get(adg
);
437 struct device
*dev
= rsnd_priv_to_dev(priv
);
438 struct device_node
*np
= dev
->of_node
;
439 u32 ckr
, rbgx
, rbga
, rbgb
;
440 u32 rate
, req_rate
, div
;
442 unsigned long req_48kHz_rate
, req_441kHz_rate
;
444 const char *parent_clk_name
= NULL
;
445 static const char * const clkout_name
[] = {
446 [CLKOUT
] = "audio_clkout",
447 [CLKOUT1
] = "audio_clkout1",
448 [CLKOUT2
] = "audio_clkout2",
449 [CLKOUT3
] = "audio_clkout3",
458 of_property_read_u32(np
, "#clock-cells", &count
);
461 * ADG supports BRRA/BRRB output only
462 * this means all clkout0/1/2/3 will be same rate
464 of_property_read_u32(np
, "clock-frequency", &req_rate
);
467 if (0 == (req_rate
% 44100))
468 req_441kHz_rate
= req_rate
;
469 if (0 == (req_rate
% 48000))
470 req_48kHz_rate
= req_rate
;
473 * This driver is assuming that AUDIO_CLKA/AUDIO_CLKB/AUDIO_CLKC
474 * have 44.1kHz or 48kHz base clocks for now.
476 * SSI itself can divide parent clock by 1/1 - 1/16
478 * rsnd_adg_ssi_clk_try_start()
479 * rsnd_ssi_master_clk_start()
482 rbga
= 2; /* default 1/6 */
483 rbgb
= 2; /* default 1/6 */
484 adg
->rbga_rate_for_441khz
= 0;
485 adg
->rbgb_rate_for_48khz
= 0;
486 for_each_rsnd_clk(clk
, adg
, i
) {
487 rate
= clk_get_rate(clk
);
489 if (0 == rate
) /* not used */
493 if (!adg
->rbga_rate_for_441khz
&& (0 == rate
% 44100)) {
496 div
= rate
/ req_441kHz_rate
;
497 rbgx
= rsnd_adg_calculate_rbgx(div
);
498 if (BRRx_MASK(rbgx
) == rbgx
) {
500 adg
->rbga_rate_for_441khz
= rate
/ div
;
501 ckr
|= brg_table
[i
] << 20;
503 parent_clk_name
= __clk_get_name(clk
);
508 if (!adg
->rbgb_rate_for_48khz
&& (0 == rate
% 48000)) {
511 div
= rate
/ req_48kHz_rate
;
512 rbgx
= rsnd_adg_calculate_rbgx(div
);
513 if (BRRx_MASK(rbgx
) == rbgx
) {
515 adg
->rbgb_rate_for_48khz
= rate
/ div
;
516 ckr
|= brg_table
[i
] << 16;
517 if (req_48kHz_rate
) {
518 parent_clk_name
= __clk_get_name(clk
);
526 * ADG supports BRRA/BRRB output only.
527 * this means all clkout0/1/2/3 will be * same rate
534 clk
= clk_register_fixed_rate(dev
, clkout_name
[CLKOUT
],
537 0 : CLK_IS_ROOT
, req_rate
);
539 adg
->clkout
[CLKOUT
] = clk
;
540 of_clk_add_provider(np
, of_clk_src_simple_get
, clk
);
547 for (i
= 0; i
< CLKOUTMAX
; i
++) {
548 clk
= clk_register_fixed_rate(dev
, clkout_name
[i
],
554 adg
->onecell
.clks
= adg
->clkout
;
555 adg
->onecell
.clk_num
= CLKOUTMAX
;
557 adg
->clkout
[i
] = clk
;
559 of_clk_add_provider(np
, of_clk_src_onecell_get
,
565 rsnd_mod_bset(adg_mod
, SSICKR
, 0x00FF0000, ckr
);
566 rsnd_mod_write(adg_mod
, BRRA
, rbga
);
567 rsnd_mod_write(adg_mod
, BRRB
, rbgb
);
569 for_each_rsnd_clkout(clk
, adg
, i
)
570 dev_dbg(dev
, "clkout %d : %p : %ld\n", i
, clk
, clk_get_rate(clk
));
571 dev_dbg(dev
, "SSICKR = 0x%08x, BRRA/BRRB = 0x%x/0x%x\n",
575 int rsnd_adg_probe(struct platform_device
*pdev
,
576 const struct rsnd_of_data
*of_data
,
577 struct rsnd_priv
*priv
)
579 struct rsnd_adg
*adg
;
580 struct device
*dev
= rsnd_priv_to_dev(priv
);
582 adg
= devm_kzalloc(dev
, sizeof(*adg
), GFP_KERNEL
);
584 dev_err(dev
, "ADG allocate failed\n");
589 * ADG is special module.
590 * Use ADG mod without rsnd_mod_init() to make debug easy
591 * for rsnd_write/rsnd_read
593 adg
->mod
.ops
= &adg_ops
;
594 adg
->mod
.priv
= priv
;
596 rsnd_adg_get_clkin(priv
, adg
);
597 rsnd_adg_get_clkout(priv
, adg
);