Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) // smdk_spdif.c - S/PDIF audio for SMDK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) // Copyright (C) 2010 Samsung Electronics Co., Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <sound/soc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include "spdif.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) /* Audio clock settings are belonged to board specific part. Every
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * board can set audio source clock setting which is matched with H/W
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * like this function-'set_audio_clock_heirachy'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) static int set_audio_clock_heirachy(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	struct clk *fout_epll, *mout_epll, *sclk_audio0, *sclk_spdif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	fout_epll = clk_get(NULL, "fout_epll");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	if (IS_ERR(fout_epll)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 		printk(KERN_WARNING "%s: Cannot find fout_epll.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 				__func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	mout_epll = clk_get(NULL, "mout_epll");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	if (IS_ERR(mout_epll)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		printk(KERN_WARNING "%s: Cannot find mout_epll.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 				__func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	sclk_audio0 = clk_get(&pdev->dev, "sclk_audio");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	if (IS_ERR(sclk_audio0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		printk(KERN_WARNING "%s: Cannot find sclk_audio.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 				__func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		goto out2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	sclk_spdif = clk_get(NULL, "sclk_spdif");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	if (IS_ERR(sclk_spdif)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		printk(KERN_WARNING "%s: Cannot find sclk_spdif.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 				__func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		goto out3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	/* Set audio clock hierarchy for S/PDIF */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	clk_set_parent(mout_epll, fout_epll);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	clk_set_parent(sclk_audio0, mout_epll);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	clk_set_parent(sclk_spdif, sclk_audio0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	clk_put(sclk_spdif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) out3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	clk_put(sclk_audio0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) out2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	clk_put(mout_epll);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) out1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	clk_put(fout_epll);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) /* We should haved to set clock directly on this part because of clock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71)  * scheme of Samsudng SoCs did not support to set rates from abstrct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72)  * clock of it's hierarchy.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) static int set_audio_clock_rate(unsigned long epll_rate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 				unsigned long audio_rate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	struct clk *fout_epll, *sclk_spdif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	fout_epll = clk_get(NULL, "fout_epll");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	if (IS_ERR(fout_epll)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		printk(KERN_ERR "%s: failed to get fout_epll\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	clk_set_rate(fout_epll, epll_rate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	clk_put(fout_epll);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	sclk_spdif = clk_get(NULL, "sclk_spdif");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	if (IS_ERR(sclk_spdif)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		printk(KERN_ERR "%s: failed to get sclk_spdif\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	clk_set_rate(sclk_spdif, audio_rate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	clk_put(sclk_spdif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static int smdk_hw_params(struct snd_pcm_substream *substream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		struct snd_pcm_hw_params *params)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	unsigned long pll_out, rclk_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	int ret, ratio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	switch (params_rate(params)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	case 44100:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		pll_out = 45158400;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	case 32000:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	case 48000:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	case 96000:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		pll_out = 49152000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	/* Setting ratio to 512fs helps to use S/PDIF with HDMI without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	 * modify S/PDIF ASoC machine driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	ratio = 512;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	rclk_rate = params_rate(params) * ratio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	/* Set audio source clock rates */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	ret = set_audio_clock_rate(pll_out, rclk_rate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	/* Set S/PDIF uses internal source clock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	ret = snd_soc_dai_set_sysclk(cpu_dai, SND_SOC_SPDIF_INT_MCLK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 					rclk_rate, SND_SOC_CLOCK_IN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static const struct snd_soc_ops smdk_spdif_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	.hw_params = smdk_hw_params,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) SND_SOC_DAILINK_DEFS(spdif,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	DAILINK_COMP_ARRAY(COMP_CPU("samsung-spdif")),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	DAILINK_COMP_ARRAY(COMP_CODEC("spdif-dit", "dit-hifi")),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-spdif")));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static struct snd_soc_dai_link smdk_dai = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	.name = "S/PDIF",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	.stream_name = "S/PDIF PCM Playback",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	.ops = &smdk_spdif_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	SND_SOC_DAILINK_REG(spdif),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static struct snd_soc_card smdk = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	.name = "SMDK-S/PDIF",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	.owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	.dai_link = &smdk_dai,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	.num_links = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static struct platform_device *smdk_snd_spdif_dit_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static struct platform_device *smdk_snd_spdif_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static int __init smdk_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	smdk_snd_spdif_dit_device = platform_device_alloc("spdif-dit", -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	if (!smdk_snd_spdif_dit_device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	ret = platform_device_add(smdk_snd_spdif_dit_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		goto err1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	smdk_snd_spdif_device = platform_device_alloc("soc-audio", -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	if (!smdk_snd_spdif_device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		goto err2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	platform_set_drvdata(smdk_snd_spdif_device, &smdk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	ret = platform_device_add(smdk_snd_spdif_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		goto err3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	/* Set audio clock hierarchy manually */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	ret = set_audio_clock_heirachy(smdk_snd_spdif_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		goto err4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) err4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	platform_device_del(smdk_snd_spdif_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) err3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	platform_device_put(smdk_snd_spdif_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) err2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	platform_device_del(smdk_snd_spdif_dit_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) err1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	platform_device_put(smdk_snd_spdif_dit_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static void __exit smdk_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	platform_device_unregister(smdk_snd_spdif_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	platform_device_unregister(smdk_snd_spdif_dit_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) module_init(smdk_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) module_exit(smdk_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) MODULE_AUTHOR("Seungwhan Youn, <sw.youn@samsung.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) MODULE_DESCRIPTION("ALSA SoC SMDK+S/PDIF");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) MODULE_LICENSE("GPL");