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| 1 | +/* |
| 2 | + * ctu.c |
| 3 | + * |
| 4 | + * Copyright (c) 2015 Kuninori Morimoto <[email protected]> |
| 5 | + * |
| 6 | + * This program is free software; you can redistribute it and/or modify |
| 7 | + * it under the terms of the GNU General Public License version 2 as |
| 8 | + * published by the Free Software Foundation. |
| 9 | + */ |
| 10 | +#include "rsnd.h" |
| 11 | + |
| 12 | +#define CTU_NAME_SIZE 16 |
| 13 | +#define CTU_NAME "ctu" |
| 14 | + |
| 15 | +struct rsnd_ctu { |
| 16 | + struct rsnd_ctu_platform_info *info; /* rcar_snd.h */ |
| 17 | + struct rsnd_mod mod; |
| 18 | +}; |
| 19 | + |
| 20 | +#define rsnd_ctu_nr(priv) ((priv)->ctu_nr) |
| 21 | +#define for_each_rsnd_ctu(pos, priv, i) \ |
| 22 | + for ((i) = 0; \ |
| 23 | + ((i) < rsnd_ctu_nr(priv)) && \ |
| 24 | + ((pos) = (struct rsnd_ctu *)(priv)->ctu + i); \ |
| 25 | + i++) |
| 26 | + |
| 27 | +#define rsnd_ctu_initialize_lock(mod) __rsnd_ctu_initialize_lock(mod, 1) |
| 28 | +#define rsnd_ctu_initialize_unlock(mod) __rsnd_ctu_initialize_lock(mod, 0) |
| 29 | +static void __rsnd_ctu_initialize_lock(struct rsnd_mod *mod, u32 enable) |
| 30 | +{ |
| 31 | + rsnd_mod_write(mod, CTU_CTUIR, enable); |
| 32 | +} |
| 33 | + |
| 34 | +static int rsnd_ctu_init(struct rsnd_mod *mod, |
| 35 | + struct rsnd_dai_stream *io, |
| 36 | + struct rsnd_priv *priv) |
| 37 | +{ |
| 38 | + rsnd_mod_hw_start(mod); |
| 39 | + |
| 40 | + rsnd_ctu_initialize_lock(mod); |
| 41 | + |
| 42 | + rsnd_mod_write(mod, CTU_ADINR, rsnd_get_adinr_chan(mod, io)); |
| 43 | + |
| 44 | + rsnd_ctu_initialize_unlock(mod); |
| 45 | + |
| 46 | + return 0; |
| 47 | +} |
| 48 | + |
| 49 | +static int rsnd_ctu_quit(struct rsnd_mod *mod, |
| 50 | + struct rsnd_dai_stream *io, |
| 51 | + struct rsnd_priv *priv) |
| 52 | +{ |
| 53 | + rsnd_mod_hw_stop(mod); |
| 54 | + |
| 55 | + return 0; |
| 56 | +} |
| 57 | + |
| 58 | +static struct rsnd_mod_ops rsnd_ctu_ops = { |
| 59 | + .name = CTU_NAME, |
| 60 | + .init = rsnd_ctu_init, |
| 61 | + .quit = rsnd_ctu_quit, |
| 62 | +}; |
| 63 | + |
| 64 | +struct rsnd_mod *rsnd_ctu_mod_get(struct rsnd_priv *priv, int id) |
| 65 | +{ |
| 66 | + if (WARN_ON(id < 0 || id >= rsnd_ctu_nr(priv))) |
| 67 | + id = 0; |
| 68 | + |
| 69 | + return &((struct rsnd_ctu *)(priv->ctu) + id)->mod; |
| 70 | +} |
| 71 | + |
| 72 | +void rsnd_of_parse_ctu(struct platform_device *pdev, |
| 73 | + const struct rsnd_of_data *of_data, |
| 74 | + struct rsnd_priv *priv) |
| 75 | +{ |
| 76 | + struct device_node *node; |
| 77 | + struct rsnd_ctu_platform_info *ctu_info; |
| 78 | + struct rcar_snd_info *info = rsnd_priv_to_info(priv); |
| 79 | + struct device *dev = &pdev->dev; |
| 80 | + int nr; |
| 81 | + |
| 82 | + if (!of_data) |
| 83 | + return; |
| 84 | + |
| 85 | + node = of_get_child_by_name(dev->of_node, "rcar_sound,ctu"); |
| 86 | + if (!node) |
| 87 | + return; |
| 88 | + |
| 89 | + nr = of_get_child_count(node); |
| 90 | + if (!nr) |
| 91 | + goto rsnd_of_parse_ctu_end; |
| 92 | + |
| 93 | + ctu_info = devm_kzalloc(dev, |
| 94 | + sizeof(struct rsnd_ctu_platform_info) * nr, |
| 95 | + GFP_KERNEL); |
| 96 | + if (!ctu_info) { |
| 97 | + dev_err(dev, "ctu info allocation error\n"); |
| 98 | + goto rsnd_of_parse_ctu_end; |
| 99 | + } |
| 100 | + |
| 101 | + info->ctu_info = ctu_info; |
| 102 | + info->ctu_info_nr = nr; |
| 103 | + |
| 104 | +rsnd_of_parse_ctu_end: |
| 105 | + of_node_put(node); |
| 106 | + |
| 107 | +} |
| 108 | + |
| 109 | +int rsnd_ctu_probe(struct platform_device *pdev, |
| 110 | + const struct rsnd_of_data *of_data, |
| 111 | + struct rsnd_priv *priv) |
| 112 | +{ |
| 113 | + struct rcar_snd_info *info = rsnd_priv_to_info(priv); |
| 114 | + struct device *dev = rsnd_priv_to_dev(priv); |
| 115 | + struct rsnd_ctu *ctu; |
| 116 | + struct clk *clk; |
| 117 | + char name[CTU_NAME_SIZE]; |
| 118 | + int i, nr, ret; |
| 119 | + |
| 120 | + /* This driver doesn't support Gen1 at this point */ |
| 121 | + if (rsnd_is_gen1(priv)) { |
| 122 | + dev_warn(dev, "CTU is not supported on Gen1\n"); |
| 123 | + return -EINVAL; |
| 124 | + } |
| 125 | + |
| 126 | + rsnd_of_parse_ctu(pdev, of_data, priv); |
| 127 | + |
| 128 | + nr = info->ctu_info_nr; |
| 129 | + if (!nr) |
| 130 | + return 0; |
| 131 | + |
| 132 | + ctu = devm_kzalloc(dev, sizeof(*ctu) * nr, GFP_KERNEL); |
| 133 | + if (!ctu) |
| 134 | + return -ENOMEM; |
| 135 | + |
| 136 | + priv->ctu_nr = nr; |
| 137 | + priv->ctu = ctu; |
| 138 | + |
| 139 | + for_each_rsnd_ctu(ctu, priv, i) { |
| 140 | + /* |
| 141 | + * CTU00, CTU01, CTU02, CTU03 => CTU0 |
| 142 | + * CTU10, CTU11, CTU12, CTU13 => CTU1 |
| 143 | + */ |
| 144 | + snprintf(name, CTU_NAME_SIZE, "%s.%d", |
| 145 | + CTU_NAME, i / 4); |
| 146 | + |
| 147 | + clk = devm_clk_get(dev, name); |
| 148 | + if (IS_ERR(clk)) |
| 149 | + return PTR_ERR(clk); |
| 150 | + |
| 151 | + ctu->info = &info->ctu_info[i]; |
| 152 | + |
| 153 | + ret = rsnd_mod_init(priv, &ctu->mod, &rsnd_ctu_ops, |
| 154 | + clk, RSND_MOD_CTU, i); |
| 155 | + if (ret) |
| 156 | + return ret; |
| 157 | + } |
| 158 | + |
| 159 | + return 0; |
| 160 | +} |
| 161 | + |
| 162 | +void rsnd_ctu_remove(struct platform_device *pdev, |
| 163 | + struct rsnd_priv *priv) |
| 164 | +{ |
| 165 | + struct rsnd_ctu *ctu; |
| 166 | + int i; |
| 167 | + |
| 168 | + for_each_rsnd_ctu(ctu, priv, i) { |
| 169 | + rsnd_mod_quit(&ctu->mod); |
| 170 | + } |
| 171 | +} |
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