OpenWrt – Blame information for rev 4
?pathlinks?
Rev | Author | Line No. | Line |
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1 | office | 1 | From cbcb43856238e359086ac491f41d5d38b834268f Mon Sep 17 00:00:00 2001 |
2 | From: BabuSubashChandar <babuenir@gmail.com> |
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3 | Date: Tue, 28 Mar 2017 20:04:42 +0530 |
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4 | Subject: [PATCH 081/454] Add support for Allo Boss DAC add-on board for |
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5 | Raspberry Pi. (#1924) |
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6 | |||
7 | Signed-off-by: Baswaraj K <jaikumar@cem-solutions.net> |
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8 | Reviewed-by: Deepak <deepak@zilogic.com> |
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9 | Reviewed-by: BabuSubashChandar <babusubashchandar@zilogic.com> |
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10 | |||
11 | Add support for new clock rate and mute gpios. |
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12 | |||
13 | Signed-off-by: Baswaraj K <jaikumar@cem-solutions.net> |
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14 | Reviewed-by: Deepak <deepak@zilogic.com> |
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15 | Reviewed-by: BabuSubashChandar <babusubashchandar@zilogic.com> |
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16 | --- |
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17 | drivers/clk/Makefile | 1 + |
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18 | drivers/clk/clk-allo-dac.c | 161 ++++++++++++ |
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19 | sound/soc/bcm/Kconfig | 7 + |
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20 | sound/soc/bcm/Makefile | 2 + |
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21 | sound/soc/bcm/allo-boss-dac.c | 461 ++++++++++++++++++++++++++++++++++ |
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22 | 5 files changed, 632 insertions(+) |
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23 | create mode 100644 drivers/clk/clk-allo-dac.c |
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24 | create mode 100644 sound/soc/bcm/allo-boss-dac.c |
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25 | |||
26 | --- a/drivers/clk/Makefile |
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27 | +++ b/drivers/clk/Makefile |
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28 | @@ -18,6 +18,7 @@ endif |
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29 | |||
30 | # hardware specific clock types |
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31 | # please keep this section sorted lexicographically by file path name |
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32 | +obj-$(CONFIG_SND_BCM2708_SOC_ALLO_BOSS_DAC) += clk-allo-dac.o |
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33 | obj-$(CONFIG_MACH_ASM9260) += clk-asm9260.o |
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34 | obj-$(CONFIG_COMMON_CLK_AXI_CLKGEN) += clk-axi-clkgen.o |
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35 | obj-$(CONFIG_ARCH_AXXIA) += clk-axm5516.o |
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36 | --- /dev/null |
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37 | +++ b/drivers/clk/clk-allo-dac.c |
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38 | @@ -0,0 +1,161 @@ |
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39 | +/* |
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40 | + * Clock Driver for Allo DAC |
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41 | + * |
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42 | + * Author: Baswaraj K <jaikumar@cem-solutions.net> |
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43 | + * Copyright 2016 |
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44 | + * based on code by Stuart MacLean |
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45 | + * |
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46 | + * This program is free software; you can redistribute it and/or |
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47 | + * modify it under the terms of the GNU General Public License |
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48 | + * version 2 as published by the Free Software Foundation. |
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49 | + * |
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50 | + * This program is distributed in the hope that it will be useful, but |
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51 | + * WITHOUT ANY WARRANTY; without even the implied warranty of |
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52 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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53 | + * General Public License for more details. |
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54 | + */ |
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55 | + |
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56 | +#include <linux/clk-provider.h> |
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57 | +#include <linux/clkdev.h> |
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58 | +#include <linux/kernel.h> |
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59 | +#include <linux/module.h> |
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60 | +#include <linux/of.h> |
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61 | +#include <linux/slab.h> |
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62 | +#include <linux/platform_device.h> |
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63 | + |
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64 | +/* Clock rate of CLK44EN attached to GPIO6 pin */ |
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65 | +#define CLK_44EN_RATE 45158400UL |
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66 | +/* Clock rate of CLK48EN attached to GPIO3 pin */ |
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67 | +#define CLK_48EN_RATE 49152000UL |
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68 | + |
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69 | +/** |
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70 | + * struct allo_dac_clk - Common struct to the Allo DAC |
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71 | + * @hw: clk_hw for the common clk framework |
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72 | + * @mode: 0 => CLK44EN, 1 => CLK48EN |
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73 | + */ |
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74 | +struct clk_allo_hw { |
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75 | + struct clk_hw hw; |
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76 | + uint8_t mode; |
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77 | +}; |
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78 | + |
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79 | +#define to_allo_clk(_hw) container_of(_hw, struct clk_allo_hw, hw) |
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80 | + |
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81 | +static const struct of_device_id clk_allo_dac_dt_ids[] = { |
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82 | + { .compatible = "allo,dac-clk",}, |
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83 | + { } |
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84 | +}; |
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85 | +MODULE_DEVICE_TABLE(of, clk_allo_dac_dt_ids); |
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86 | + |
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87 | +static unsigned long clk_allo_dac_recalc_rate(struct clk_hw *hw, |
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88 | + unsigned long parent_rate) |
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89 | +{ |
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90 | + return (to_allo_clk(hw)->mode == 0) ? CLK_44EN_RATE : |
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91 | + CLK_48EN_RATE; |
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92 | +} |
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93 | + |
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94 | +static long clk_allo_dac_round_rate(struct clk_hw *hw, |
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95 | + unsigned long rate, unsigned long *parent_rate) |
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96 | +{ |
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97 | + long actual_rate; |
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98 | + |
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99 | + if (rate <= CLK_44EN_RATE) { |
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100 | + actual_rate = (long)CLK_44EN_RATE; |
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101 | + } else if (rate >= CLK_48EN_RATE) { |
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102 | + actual_rate = (long)CLK_48EN_RATE; |
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103 | + } else { |
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104 | + long diff44Rate = (long)(rate - CLK_44EN_RATE); |
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105 | + long diff48Rate = (long)(CLK_48EN_RATE - rate); |
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106 | + |
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107 | + if (diff44Rate < diff48Rate) |
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108 | + actual_rate = (long)CLK_44EN_RATE; |
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109 | + else |
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110 | + actual_rate = (long)CLK_48EN_RATE; |
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111 | + } |
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112 | + return actual_rate; |
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113 | +} |
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114 | + |
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115 | + |
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116 | +static int clk_allo_dac_set_rate(struct clk_hw *hw, |
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117 | + unsigned long rate, unsigned long parent_rate) |
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118 | +{ |
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119 | + unsigned long actual_rate; |
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120 | + struct clk_allo_hw *clk = to_allo_clk(hw); |
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121 | + |
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122 | + actual_rate = (unsigned long)clk_allo_dac_round_rate(hw, rate, |
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123 | + &parent_rate); |
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124 | + clk->mode = (actual_rate == CLK_44EN_RATE) ? 0 : 1; |
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125 | + return 0; |
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126 | +} |
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127 | + |
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128 | + |
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129 | +const struct clk_ops clk_allo_dac_rate_ops = { |
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130 | + .recalc_rate = clk_allo_dac_recalc_rate, |
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131 | + .round_rate = clk_allo_dac_round_rate, |
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132 | + .set_rate = clk_allo_dac_set_rate, |
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133 | +}; |
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134 | + |
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135 | +static int clk_allo_dac_probe(struct platform_device *pdev) |
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136 | +{ |
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137 | + int ret; |
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138 | + struct clk_allo_hw *proclk; |
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139 | + struct clk *clk; |
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140 | + struct device *dev; |
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141 | + struct clk_init_data init; |
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142 | + |
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143 | + dev = &pdev->dev; |
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144 | + |
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145 | + proclk = kzalloc(sizeof(struct clk_allo_hw), GFP_KERNEL); |
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146 | + if (!proclk) |
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147 | + return -ENOMEM; |
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148 | + |
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149 | + init.name = "clk-allo-dac"; |
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150 | + init.ops = &clk_allo_dac_rate_ops; |
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151 | + init.flags = CLK_IS_BASIC; |
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152 | + init.parent_names = NULL; |
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153 | + init.num_parents = 0; |
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154 | + |
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155 | + proclk->mode = 0; |
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156 | + proclk->hw.init = &init; |
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157 | + |
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158 | + clk = devm_clk_register(dev, &proclk->hw); |
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159 | + if (!IS_ERR(clk)) { |
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160 | + ret = of_clk_add_provider(dev->of_node, of_clk_src_simple_get, |
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161 | + clk); |
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162 | + } else { |
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163 | + dev_err(dev, "Fail to register clock driver\n"); |
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164 | + kfree(proclk); |
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165 | + ret = PTR_ERR(clk); |
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166 | + } |
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167 | + return ret; |
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168 | +} |
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169 | + |
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170 | +static int clk_allo_dac_remove(struct platform_device *pdev) |
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171 | +{ |
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172 | + of_clk_del_provider(pdev->dev.of_node); |
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173 | + return 0; |
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174 | +} |
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175 | + |
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176 | +static struct platform_driver clk_allo_dac_driver = { |
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177 | + .probe = clk_allo_dac_probe, |
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178 | + .remove = clk_allo_dac_remove, |
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179 | + .driver = { |
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180 | + .name = "clk-allo-dac", |
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181 | + .of_match_table = clk_allo_dac_dt_ids, |
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182 | + }, |
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183 | +}; |
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184 | + |
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185 | +static int __init clk_allo_dac_init(void) |
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186 | +{ |
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187 | + return platform_driver_register(&clk_allo_dac_driver); |
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188 | +} |
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189 | +core_initcall(clk_allo_dac_init); |
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190 | + |
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191 | +static void __exit clk_allo_dac_exit(void) |
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192 | +{ |
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193 | + platform_driver_unregister(&clk_allo_dac_driver); |
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194 | +} |
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195 | +module_exit(clk_allo_dac_exit); |
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196 | + |
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197 | +MODULE_DESCRIPTION("Allo DAC clock driver"); |
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198 | +MODULE_LICENSE("GPL v2"); |
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199 | +MODULE_ALIAS("platform:clk-allo-dac"); |
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200 | --- a/sound/soc/bcm/Kconfig |
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201 | +++ b/sound/soc/bcm/Kconfig |
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202 | @@ -138,3 +138,10 @@ config SND_BCM2708_SOC_ALLO_PIANO_DAC_PL |
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203 | select SND_SOC_PCM512x_I2C |
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204 | help |
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205 | Say Y or M if you want to add support for Allo Piano DAC Plus. |
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206 | + |
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207 | +config SND_BCM2708_SOC_ALLO_BOSS_DAC |
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208 | + tristate "Support for Allo Boss DAC" |
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209 | + depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S |
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210 | + select SND_SOC_PCM512x_I2C |
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211 | + help |
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212 | + Say Y or M if you want to add support for Allo Boss DAC. |
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213 | --- a/sound/soc/bcm/Makefile |
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214 | +++ b/sound/soc/bcm/Makefile |
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215 | @@ -24,6 +24,7 @@ snd-soc-raspidac3-objs := raspidac3.o |
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216 | snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o |
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217 | snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o |
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218 | snd-soc-dionaudio-loco-objs := dionaudio_loco.o |
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219 | +snd-soc-allo-boss-dac-objs := allo-boss-dac.o |
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220 | snd-soc-allo-piano-dac-objs := allo-piano-dac.o |
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221 | snd-soc-allo-piano-dac-plus-objs := allo-piano-dac-plus.o |
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222 | |||
223 | @@ -42,5 +43,6 @@ obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3) |
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224 | obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o |
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225 | obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o |
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226 | obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o |
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227 | +obj-$(CONFIG_SND_BCM2708_SOC_ALLO_BOSS_DAC) += snd-soc-allo-boss-dac.o |
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228 | obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o |
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229 | obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC_PLUS) += snd-soc-allo-piano-dac-plus.o |
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230 | --- /dev/null |
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231 | +++ b/sound/soc/bcm/allo-boss-dac.c |
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232 | @@ -0,0 +1,461 @@ |
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233 | +/* |
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234 | + * ALSA ASoC Machine Driver for Allo Boss DAC |
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235 | + * |
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236 | + * Author: Baswaraj K <jaikumar@cem-solutions.net> |
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237 | + * Copyright 2017 |
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238 | + * based on code by Daniel Matuschek, |
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239 | + * Stuart MacLean <stuart@hifiberry.com> |
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240 | + * based on code by Florian Meier <florian.meier@koalo.de> |
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241 | + * |
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242 | + * This program is free software; you can redistribute it and/or |
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243 | + * modify it under the terms of the GNU General Public License |
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244 | + * version 2 as published by the Free Software Foundation. |
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245 | + * |
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246 | + * This program is distributed in the hope that it will be useful, but |
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247 | + * WITHOUT ANY WARRANTY; without even the implied warranty of |
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248 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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249 | + * General Public License for more details. |
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250 | + */ |
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251 | + |
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252 | +#include <linux/module.h> |
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253 | +#include <linux/gpio/consumer.h> |
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254 | +#include <linux/platform_device.h> |
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255 | +#include <linux/clk.h> |
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256 | +#include <linux/delay.h> |
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257 | + |
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258 | +#include <sound/core.h> |
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259 | +#include <sound/pcm.h> |
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260 | +#include <sound/pcm_params.h> |
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261 | +#include <sound/soc.h> |
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262 | +#include "../codecs/pcm512x.h" |
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263 | + |
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264 | +#define ALLO_BOSS_NOCLOCK 0 |
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265 | +#define ALLO_BOSS_CLK44EN 1 |
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266 | +#define ALLO_BOSS_CLK48EN 2 |
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267 | + |
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268 | +struct pcm512x_priv { |
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269 | + struct regmap *regmap; |
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270 | + struct clk *sclk; |
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271 | +}; |
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272 | + |
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273 | +static struct gpio_desc *mute_gpio; |
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274 | + |
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275 | +/* Clock rate of CLK44EN attached to GPIO6 pin */ |
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276 | +#define CLK_44EN_RATE 45158400UL |
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277 | +/* Clock rate of CLK48EN attached to GPIO3 pin */ |
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278 | +#define CLK_48EN_RATE 49152000UL |
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279 | + |
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280 | +static bool slave; |
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281 | +static bool snd_soc_allo_boss_master; |
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282 | +static bool digital_gain_0db_limit = true; |
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283 | + |
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284 | +static void snd_allo_boss_select_clk(struct snd_soc_codec *codec, |
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285 | + int clk_id) |
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286 | +{ |
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287 | + switch (clk_id) { |
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288 | + case ALLO_BOSS_NOCLOCK: |
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289 | + snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x24, 0x00); |
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290 | + break; |
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291 | + case ALLO_BOSS_CLK44EN: |
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292 | + snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x24, 0x20); |
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293 | + break; |
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294 | + case ALLO_BOSS_CLK48EN: |
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295 | + snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x24, 0x04); |
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296 | + break; |
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297 | + } |
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298 | +} |
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299 | + |
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300 | +static void snd_allo_boss_clk_gpio(struct snd_soc_codec *codec) |
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301 | +{ |
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302 | + snd_soc_update_bits(codec, PCM512x_GPIO_EN, 0x24, 0x24); |
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303 | + snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_3, 0x0f, 0x02); |
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304 | + snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_6, 0x0f, 0x02); |
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305 | +} |
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306 | + |
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307 | +static bool snd_allo_boss_is_sclk(struct snd_soc_codec *codec) |
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308 | +{ |
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309 | + int sck; |
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310 | + |
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311 | + sck = snd_soc_read(codec, PCM512x_RATE_DET_4); |
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312 | + return (!(sck & 0x40)); |
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313 | +} |
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314 | + |
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315 | +static bool snd_allo_boss_is_sclk_sleep( |
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316 | + struct snd_soc_codec *codec) |
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317 | +{ |
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318 | + msleep(2); |
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319 | + return snd_allo_boss_is_sclk(codec); |
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320 | +} |
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321 | + |
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322 | +static bool snd_allo_boss_is_master_card(struct snd_soc_codec *codec) |
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323 | +{ |
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324 | + bool isClk44EN, isClk48En, isNoClk; |
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325 | + |
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326 | + snd_allo_boss_clk_gpio(codec); |
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327 | + |
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328 | + snd_allo_boss_select_clk(codec, ALLO_BOSS_CLK44EN); |
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329 | + isClk44EN = snd_allo_boss_is_sclk_sleep(codec); |
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330 | + |
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331 | + snd_allo_boss_select_clk(codec, ALLO_BOSS_NOCLOCK); |
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332 | + isNoClk = snd_allo_boss_is_sclk_sleep(codec); |
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333 | + |
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334 | + snd_allo_boss_select_clk(codec, ALLO_BOSS_CLK48EN); |
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335 | + isClk48En = snd_allo_boss_is_sclk_sleep(codec); |
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336 | + |
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337 | + return (isClk44EN && isClk48En && !isNoClk); |
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338 | +} |
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339 | + |
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340 | +static int snd_allo_boss_clk_for_rate(int sample_rate) |
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341 | +{ |
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342 | + int type; |
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343 | + |
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344 | + switch (sample_rate) { |
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345 | + case 11025: |
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346 | + case 22050: |
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347 | + case 44100: |
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348 | + case 88200: |
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349 | + case 176400: |
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350 | + case 352800: |
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351 | + type = ALLO_BOSS_CLK44EN; |
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352 | + break; |
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353 | + default: |
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354 | + type = ALLO_BOSS_CLK48EN; |
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355 | + break; |
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356 | + } |
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357 | + return type; |
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358 | +} |
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359 | + |
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360 | +static void snd_allo_boss_set_sclk(struct snd_soc_codec *codec, |
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361 | + int sample_rate) |
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362 | +{ |
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363 | + struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); |
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364 | + |
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365 | + if (!IS_ERR(pcm512x->sclk)) { |
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366 | + int ctype; |
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367 | + |
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368 | + ctype = snd_allo_boss_clk_for_rate(sample_rate); |
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369 | + clk_set_rate(pcm512x->sclk, (ctype == ALLO_BOSS_CLK44EN) |
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370 | + ? CLK_44EN_RATE : CLK_48EN_RATE); |
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371 | + snd_allo_boss_select_clk(codec, ctype); |
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372 | + } |
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373 | +} |
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374 | + |
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375 | +static int snd_allo_boss_init(struct snd_soc_pcm_runtime *rtd) |
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376 | +{ |
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377 | + struct snd_soc_codec *codec = rtd->codec; |
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378 | + struct pcm512x_priv *priv = snd_soc_codec_get_drvdata(codec); |
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379 | + |
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380 | + if (slave) |
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381 | + snd_soc_allo_boss_master = false; |
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382 | + else |
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383 | + snd_soc_allo_boss_master = |
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384 | + snd_allo_boss_is_master_card(codec); |
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385 | + |
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386 | + if (snd_soc_allo_boss_master) { |
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387 | + struct snd_soc_dai_link *dai = rtd->dai_link; |
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388 | + |
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389 | + dai->name = "BossDAC"; |
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390 | + dai->stream_name = "Boss DAC HiFi [Master]"; |
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391 | + dai->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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392 | + | SND_SOC_DAIFMT_CBM_CFM; |
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393 | + |
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394 | + snd_soc_update_bits(codec, PCM512x_BCLK_LRCLK_CFG, 0x31, 0x11); |
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395 | + snd_soc_update_bits(codec, PCM512x_MASTER_MODE, 0x03, 0x03); |
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396 | + snd_soc_update_bits(codec, PCM512x_MASTER_CLKDIV_2, 0x7f, 63); |
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397 | + /* |
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398 | + * Default sclk to CLK_48EN_RATE, otherwise codec |
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399 | + * pcm512x_dai_startup_master method could call |
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400 | + * snd_pcm_hw_constraint_ratnums using CLK_44EN/64 |
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401 | + * which will mask 384k sample rate. |
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402 | + */ |
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403 | + if (!IS_ERR(priv->sclk)) |
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404 | + clk_set_rate(priv->sclk, CLK_48EN_RATE); |
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405 | + } else { |
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406 | + priv->sclk = ERR_PTR(-ENOENT); |
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407 | + } |
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408 | + |
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409 | + snd_soc_update_bits(codec, PCM512x_GPIO_EN, 0x08, 0x08); |
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410 | + snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_4, 0x0f, 0x02); |
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411 | + snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08, 0x08); |
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412 | + |
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413 | + if (digital_gain_0db_limit) { |
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414 | + int ret; |
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415 | + struct snd_soc_card *card = rtd->card; |
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416 | + |
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417 | + ret = snd_soc_limit_volume(card, "Digital Playback Volume", |
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418 | + 207); |
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419 | + if (ret < 0) |
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420 | + dev_warn(card->dev, "Failed to set volume limit: %d\n", |
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421 | + ret); |
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422 | + } |
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423 | + |
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424 | + return 0; |
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425 | +} |
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426 | + |
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427 | +static int snd_allo_boss_update_rate_den( |
||
428 | + struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) |
||
429 | +{ |
||
430 | + struct snd_soc_pcm_runtime *rtd = substream->private_data; |
||
431 | + struct snd_soc_codec *codec = rtd->codec; |
||
432 | + struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); |
||
433 | + struct snd_ratnum *rats_no_pll; |
||
434 | + unsigned int num = 0, den = 0; |
||
435 | + int err; |
||
436 | + |
||
437 | + rats_no_pll = devm_kzalloc(rtd->dev, sizeof(*rats_no_pll), GFP_KERNEL); |
||
438 | + if (!rats_no_pll) |
||
439 | + return -ENOMEM; |
||
440 | + |
||
441 | + rats_no_pll->num = clk_get_rate(pcm512x->sclk) / 64; |
||
442 | + rats_no_pll->den_min = 1; |
||
443 | + rats_no_pll->den_max = 128; |
||
444 | + rats_no_pll->den_step = 1; |
||
445 | + |
||
446 | + err = snd_interval_ratnum(hw_param_interval(params, |
||
447 | + SNDRV_PCM_HW_PARAM_RATE), 1, rats_no_pll, &num, &den); |
||
448 | + if (err >= 0 && den) { |
||
449 | + params->rate_num = num; |
||
450 | + params->rate_den = den; |
||
451 | + } |
||
452 | + |
||
453 | + devm_kfree(rtd->dev, rats_no_pll); |
||
454 | + return 0; |
||
455 | +} |
||
456 | + |
||
457 | +static int snd_allo_boss_set_bclk_ratio_pro( |
||
458 | + struct snd_soc_dai *cpu_dai, struct snd_pcm_hw_params *params) |
||
459 | +{ |
||
460 | + int bratio = snd_pcm_format_physical_width(params_format(params)) |
||
461 | + * params_channels(params); |
||
462 | + return snd_soc_dai_set_bclk_ratio(cpu_dai, bratio); |
||
463 | +} |
||
464 | + |
||
465 | +static void snd_allo_boss_gpio_mute(struct snd_soc_card *card) |
||
466 | +{ |
||
467 | + if (mute_gpio) |
||
468 | + gpiod_set_value_cansleep(mute_gpio, 1); |
||
469 | +} |
||
470 | + |
||
471 | +static void snd_allo_boss_gpio_unmute(struct snd_soc_card *card) |
||
472 | +{ |
||
473 | + if (mute_gpio) |
||
474 | + gpiod_set_value_cansleep(mute_gpio, 0); |
||
475 | +} |
||
476 | + |
||
477 | +static int snd_allo_boss_set_bias_level(struct snd_soc_card *card, |
||
478 | + struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level) |
||
479 | +{ |
||
480 | + struct snd_soc_pcm_runtime *rtd; |
||
481 | + struct snd_soc_dai *codec_dai; |
||
482 | + |
||
483 | + rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name); |
||
484 | + codec_dai = rtd->codec_dai; |
||
485 | + |
||
486 | + if (dapm->dev != codec_dai->dev) |
||
487 | + return 0; |
||
488 | + |
||
489 | + switch (level) { |
||
490 | + case SND_SOC_BIAS_PREPARE: |
||
491 | + if (dapm->bias_level != SND_SOC_BIAS_STANDBY) |
||
492 | + break; |
||
493 | + /* UNMUTE DAC */ |
||
494 | + snd_allo_boss_gpio_unmute(card); |
||
495 | + break; |
||
496 | + |
||
497 | + case SND_SOC_BIAS_STANDBY: |
||
498 | + if (dapm->bias_level != SND_SOC_BIAS_PREPARE) |
||
499 | + break; |
||
500 | + /* MUTE DAC */ |
||
501 | + snd_allo_boss_gpio_mute(card); |
||
502 | + break; |
||
503 | + |
||
504 | + default: |
||
505 | + break; |
||
506 | + } |
||
507 | + |
||
508 | + return 0; |
||
509 | +} |
||
510 | + |
||
511 | +static int snd_allo_boss_hw_params( |
||
512 | + struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) |
||
513 | +{ |
||
514 | + int ret = 0; |
||
515 | + struct snd_soc_pcm_runtime *rtd = substream->private_data; |
||
516 | + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
||
517 | + unsigned int sample_bits = |
||
518 | + snd_pcm_format_physical_width(params_format(params)); |
||
519 | + |
||
520 | + if (snd_soc_allo_boss_master) { |
||
521 | + struct snd_soc_codec *codec = rtd->codec; |
||
522 | + |
||
523 | + snd_allo_boss_set_sclk(codec, |
||
524 | + params_rate(params)); |
||
525 | + |
||
526 | + ret = snd_allo_boss_set_bclk_ratio_pro(cpu_dai, |
||
527 | + params); |
||
528 | + if (!ret) |
||
529 | + ret = snd_allo_boss_update_rate_den( |
||
530 | + substream, params); |
||
531 | + } else { |
||
532 | + ret = snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2); |
||
533 | + } |
||
534 | + return ret; |
||
535 | +} |
||
536 | + |
||
537 | +static int snd_allo_boss_startup( |
||
538 | + struct snd_pcm_substream *substream) |
||
539 | +{ |
||
540 | + struct snd_soc_pcm_runtime *rtd = substream->private_data; |
||
541 | + struct snd_soc_codec *codec = rtd->codec; |
||
542 | + struct snd_soc_card *card = rtd->card; |
||
543 | + |
||
544 | + snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08, 0x08); |
||
545 | + snd_allo_boss_gpio_mute(card); |
||
546 | + |
||
547 | + if (snd_soc_allo_boss_master) { |
||
548 | + struct pcm512x_priv *priv = snd_soc_codec_get_drvdata(codec); |
||
549 | + /* |
||
550 | + * Default sclk to CLK_48EN_RATE, otherwise codec |
||
551 | + * pcm512x_dai_startup_master method could call |
||
552 | + * snd_pcm_hw_constraint_ratnums using CLK_44EN/64 |
||
553 | + * which will mask 384k sample rate. |
||
554 | + */ |
||
555 | + if (!IS_ERR(priv->sclk)) |
||
556 | + clk_set_rate(priv->sclk, CLK_48EN_RATE); |
||
557 | + } |
||
558 | + |
||
559 | + return 0; |
||
560 | +} |
||
561 | + |
||
562 | +static void snd_allo_boss_shutdown( |
||
563 | + struct snd_pcm_substream *substream) |
||
564 | +{ |
||
565 | + struct snd_soc_pcm_runtime *rtd = substream->private_data; |
||
566 | + struct snd_soc_codec *codec = rtd->codec; |
||
567 | + |
||
568 | + snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08, 0x00); |
||
569 | +} |
||
570 | + |
||
571 | +static int snd_allo_boss_prepare( |
||
572 | + struct snd_pcm_substream *substream) |
||
573 | +{ |
||
574 | + struct snd_soc_pcm_runtime *rtd = substream->private_data; |
||
575 | + struct snd_soc_card *card = rtd->card; |
||
576 | + |
||
577 | + snd_allo_boss_gpio_unmute(card); |
||
578 | + return 0; |
||
579 | +} |
||
580 | +/* machine stream operations */ |
||
581 | +static struct snd_soc_ops snd_allo_boss_ops = { |
||
582 | + .hw_params = snd_allo_boss_hw_params, |
||
583 | + .startup = snd_allo_boss_startup, |
||
584 | + .shutdown = snd_allo_boss_shutdown, |
||
585 | + .prepare = snd_allo_boss_prepare, |
||
586 | +}; |
||
587 | + |
||
588 | +static struct snd_soc_dai_link snd_allo_boss_dai[] = { |
||
589 | +{ |
||
590 | + .name = "Boss DAC", |
||
591 | + .stream_name = "Boss DAC HiFi", |
||
592 | + .cpu_dai_name = "bcm2708-i2s.0", |
||
593 | + .codec_dai_name = "pcm512x-hifi", |
||
594 | + .platform_name = "bcm2708-i2s.0", |
||
595 | + .codec_name = "pcm512x.1-004d", |
||
596 | + .dai_fmt = SND_SOC_DAIFMT_I2S | |
||
597 | + SND_SOC_DAIFMT_NB_NF | |
||
598 | + SND_SOC_DAIFMT_CBS_CFS, |
||
599 | + .ops = &snd_allo_boss_ops, |
||
600 | + .init = snd_allo_boss_init, |
||
601 | +}, |
||
602 | +}; |
||
603 | + |
||
604 | +/* audio machine driver */ |
||
605 | +static struct snd_soc_card snd_allo_boss = { |
||
606 | + .name = "BossDAC", |
||
607 | + .owner = THIS_MODULE, |
||
608 | + .dai_link = snd_allo_boss_dai, |
||
609 | + .num_links = ARRAY_SIZE(snd_allo_boss_dai), |
||
610 | +}; |
||
611 | + |
||
612 | +static int snd_allo_boss_probe(struct platform_device *pdev) |
||
613 | +{ |
||
614 | + int ret = 0; |
||
615 | + |
||
616 | + snd_allo_boss.dev = &pdev->dev; |
||
617 | + |
||
618 | + if (pdev->dev.of_node) { |
||
619 | + struct device_node *i2s_node; |
||
620 | + struct snd_soc_dai_link *dai; |
||
621 | + |
||
622 | + dai = &snd_allo_boss_dai[0]; |
||
623 | + i2s_node = of_parse_phandle(pdev->dev.of_node, |
||
624 | + "i2s-controller", 0); |
||
625 | + |
||
626 | + if (i2s_node) { |
||
627 | + dai->cpu_dai_name = NULL; |
||
628 | + dai->cpu_of_node = i2s_node; |
||
629 | + dai->platform_name = NULL; |
||
630 | + dai->platform_of_node = i2s_node; |
||
631 | + } |
||
632 | + |
||
633 | + digital_gain_0db_limit = !of_property_read_bool( |
||
634 | + pdev->dev.of_node, "allo,24db_digital_gain"); |
||
635 | + slave = of_property_read_bool(pdev->dev.of_node, |
||
636 | + "allo,slave"); |
||
637 | + |
||
638 | + mute_gpio = devm_gpiod_get_optional(&pdev->dev, "mute", |
||
639 | + GPIOD_OUT_LOW); |
||
640 | + if (IS_ERR(mute_gpio)) { |
||
641 | + ret = PTR_ERR(mute_gpio); |
||
642 | + dev_err(&pdev->dev, |
||
643 | + "failed to get mute gpio: %d\n", ret); |
||
644 | + return ret; |
||
645 | + } |
||
646 | + |
||
647 | + if (mute_gpio) |
||
648 | + snd_allo_boss.set_bias_level = |
||
649 | + snd_allo_boss_set_bias_level; |
||
650 | + |
||
651 | + ret = snd_soc_register_card(&snd_allo_boss); |
||
652 | + if (ret) { |
||
653 | + dev_err(&pdev->dev, |
||
654 | + "snd_soc_register_card() failed: %d\n", ret); |
||
655 | + return ret; |
||
656 | + } |
||
657 | + |
||
658 | + if (mute_gpio) |
||
659 | + snd_allo_boss_gpio_mute(&snd_allo_boss); |
||
660 | + |
||
661 | + return 0; |
||
662 | + } |
||
663 | + |
||
664 | + return -EINVAL; |
||
665 | +} |
||
666 | + |
||
667 | +static int snd_allo_boss_remove(struct platform_device *pdev) |
||
668 | +{ |
||
669 | + snd_allo_boss_gpio_mute(&snd_allo_boss); |
||
670 | + return snd_soc_unregister_card(&snd_allo_boss); |
||
671 | +} |
||
672 | + |
||
673 | +static const struct of_device_id snd_allo_boss_of_match[] = { |
||
674 | + { .compatible = "allo,boss-dac", }, |
||
675 | + { /* sentinel */ }, |
||
676 | +}; |
||
677 | +MODULE_DEVICE_TABLE(of, snd_allo_boss_of_match); |
||
678 | + |
||
679 | +static struct platform_driver snd_allo_boss_driver = { |
||
680 | + .driver = { |
||
681 | + .name = "snd-allo-boss-dac", |
||
682 | + .owner = THIS_MODULE, |
||
683 | + .of_match_table = snd_allo_boss_of_match, |
||
684 | + }, |
||
685 | + .probe = snd_allo_boss_probe, |
||
686 | + .remove = snd_allo_boss_remove, |
||
687 | +}; |
||
688 | + |
||
689 | +module_platform_driver(snd_allo_boss_driver); |
||
690 | + |
||
691 | +MODULE_AUTHOR("Baswaraj K <jaikumar@cem-solutions.net>"); |
||
692 | +MODULE_DESCRIPTION("ALSA ASoC Machine Driver for Allo Boss DAC"); |
||
693 | +MODULE_LICENSE("GPL v2"); |