1 /* 2 * ctu.c 3 * 4 * Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 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 static 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 } 172