2 * linux/arch/arm/mach-omap2/board-n800-audio.c
4 * Copyright (C) 2006 Nokia Corporation
6 * Jarkko Nikula <jarkko.nikula@nokia.com>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
24 #include <linux/err.h>
25 #include <linux/clk.h>
26 #include <linux/platform_device.h>
27 #include <linux/spi/tsc2301.h>
30 #include <asm/arch/eac.h>
32 #include <asm/arch/dsp_common.h>
34 #if defined(CONFIG_SPI_TSC2301_AUDIO) && defined(CONFIG_SND_OMAP24XX_EAC)
37 static struct clk *sys_clkout2;
38 static struct clk *sys_clkout2_src;
39 static struct clk *func96m_clk;
40 static struct device *eac_device;
41 static struct device *tsc2301_device;
43 static int enable_audio;
45 static spinlock_t audio_lock;
48 * Leaving EAC and sys_clkout2 pins multiplexed to those subsystems results
49 * in about 2 mA extra current leak when audios are powered down. The
50 * workaround is to multiplex them to protected mode (with pull-ups enabled)
51 * whenever audio is not being used.
53 static int eac_mux_disabled = 0;
54 static int clkout2_mux_disabled = 0;
55 static u32 saved_mux[2];
57 static void n800_enable_eac_mux(void)
59 if (!eac_mux_disabled)
61 __raw_writel(saved_mux[1], IO_ADDRESS(0x48000124));
65 static void n800_disable_eac_mux(void)
67 if (eac_mux_disabled) {
68 WARN_ON(eac_mux_disabled);
71 saved_mux[1] = __raw_readl(IO_ADDRESS(0x48000124));
72 __raw_writel(0x1f1f1f1f, IO_ADDRESS(0x48000124));
76 static void n800_enable_clkout2_mux(void)
78 if (!clkout2_mux_disabled)
80 __raw_writel(saved_mux[0], IO_ADDRESS(0x480000e8));
81 clkout2_mux_disabled = 0;
84 static void n800_disable_clkout2_mux(void)
88 if (clkout2_mux_disabled) {
89 WARN_ON(clkout2_mux_disabled);
92 saved_mux[0] = __raw_readl(IO_ADDRESS(0x480000e8));
93 l = saved_mux[0] & ~0xff;
95 __raw_writel(l, IO_ADDRESS(0x480000e8));
96 clkout2_mux_disabled = 1;
99 static int n800_eac_enable_ext_clocks(struct device *dev)
101 BUG_ON(tsc2301_device == NULL);
102 n800_enable_eac_mux();
103 tsc2301_mixer_enable_mclk(tsc2301_device);
108 static void n800_eac_disable_ext_clocks(struct device *dev)
110 BUG_ON(tsc2301_device == NULL);
111 tsc2301_mixer_disable_mclk(tsc2301_device);
112 n800_disable_eac_mux();
115 static int n800_audio_set_power(void *pdata, int dac, int adc)
117 BUG_ON(pdata != tsc2301_device);
118 tsc2301_mixer_set_power(tsc2301_device, dac, adc);
123 static int n800_audio_register_controls(void *pdata, struct snd_card *card)
125 BUG_ON(pdata != tsc2301_device);
126 return tsc2301_mixer_register_controls(tsc2301_device, card);
129 static struct eac_codec n800_eac_codec = {
130 .mclk_src = EAC_MCLK_EXT_2x12288000,
131 .codec_mode = EAC_CODEC_I2S_MASTER,
132 .codec_conf.i2s.polarity_changed_mode = 0,
133 .codec_conf.i2s.sync_delay_enable = 0,
134 .default_rate = 48000,
135 .set_power = n800_audio_set_power,
136 .register_controls = n800_audio_register_controls,
137 .short_name = "TSC2301",
140 static int n800_register_codec(void)
142 int r, do_enable = 0;
145 n800_eac_codec.private_data = tsc2301_device;
146 r = eac_register_codec(eac_device, &n800_eac_codec);
149 spin_lock_irqsave(&audio_lock, flags);
153 spin_unlock_irqrestore(&audio_lock, flags);
155 eac_set_mode(eac_device, 1, 1);
159 static void n800_unregister_codec(void)
162 eac_unregister_codec(eac_device);
163 eac_set_mode(eac_device, 0, 0);
166 static int n800_eac_init(struct device *dev)
170 BUG_ON(eac_device != NULL);
172 if (tsc2301_device != NULL) {
173 r = n800_register_codec();
181 static void n800_eac_cleanup(struct device *dev)
184 if (tsc2301_device != NULL)
185 n800_unregister_codec();
188 static int n800_codec_get_clocks(struct device *dev)
190 sys_clkout2_src = clk_get(dev, "sys_clkout2_src");
191 if (IS_ERR(sys_clkout2_src)) {
192 dev_err(dev, "Could not get sys_clkout2_src clock\n");
195 sys_clkout2 = clk_get(dev, "sys_clkout2");
196 if (IS_ERR(sys_clkout2)) {
197 dev_err(dev, "Could not get sys_clkout2 clock\n");
198 clk_put(sys_clkout2_src);
201 /* configure 12 MHz output on SYS_CLKOUT2. Therefore we must use
202 * 96 MHz as its parent in order to get 12 MHz */
203 func96m_clk = clk_get(dev, "func_96m_ck");
204 if (IS_ERR(func96m_clk)) {
205 dev_err(dev, "Could not get func 96M clock\n");
206 clk_put(sys_clkout2);
207 clk_put(sys_clkout2_src);
211 clk_set_parent(sys_clkout2_src, func96m_clk);
212 clk_set_rate(sys_clkout2, 12000000);
217 static void n800_codec_put_clocks(struct device *dev)
219 clk_put(func96m_clk);
220 clk_put(sys_clkout2);
221 clk_put(sys_clkout2_src);
224 static int n800_codec_enable_clock(struct device *dev)
226 n800_enable_clkout2_mux();
227 return clk_enable(sys_clkout2);
230 static void n800_codec_disable_clock(struct device *dev)
232 clk_disable(sys_clkout2);
233 n800_disable_clkout2_mux();
236 static int n800_codec_init(struct device *dev)
240 BUG_ON(tsc2301_device != NULL);
241 tsc2301_device = dev;
242 if ((r = n800_codec_get_clocks(dev)) < 0)
244 if (eac_device != NULL) {
245 r = n800_register_codec();
247 n800_codec_put_clocks(dev);
254 static void n800_codec_cleanup(struct device *dev)
256 tsc2301_device = NULL;
257 if (eac_device != NULL)
258 n800_unregister_codec();
259 n800_codec_put_clocks(dev);
262 static struct eac_platform_data n800_eac_data = {
263 .init = n800_eac_init,
264 .cleanup = n800_eac_cleanup,
265 .enable_ext_clocks = n800_eac_enable_ext_clocks,
266 .disable_ext_clocks = n800_eac_disable_ext_clocks,
269 static const struct tsc2301_mixer_gpio n800_mixer_gpios[] = {
271 .name = "Headset Amplifier",
273 .deactivate_on_pd = 1,
275 .name = "Speaker Amplifier",
278 .deactivate_on_pd = 1,
280 .name = "Headset Mic Select",
285 static struct platform_device retu_headset_device = {
286 .name = "retu-headset",
293 void __init n800_audio_init(struct tsc2301_platform_data *tc)
295 spin_lock_init(&audio_lock);
297 if (platform_device_register(&retu_headset_device) < 0)
299 omap_init_eac(&n800_eac_data);
305 tc->mclk_ratio = TSC2301_MCLK_256xFS;
306 tc->i2s_sample_rate = TSC2301_I2S_SR_48000;
307 tc->i2s_format = TSC2301_I2S_FORMAT0;
308 tc->power_down_blocks = TSC2301_REG_PD_MISC_MOPD;
309 tc->mixer_gpios = n800_mixer_gpios;
310 tc->n_mixer_gpios = ARRAY_SIZE(n800_mixer_gpios);
311 tc->codec_init = n800_codec_init;
312 tc->codec_cleanup = n800_codec_cleanup;
313 tc->enable_clock = n800_codec_enable_clock;
314 tc->disable_clock = n800_codec_disable_clock;
319 void __init n800_audio_init(void)
325 #ifdef CONFIG_OMAP_DSP
327 int n800_audio_enable(struct dsp_kfunc_device *kdev, int stage)
333 spin_lock_irqsave(&audio_lock, flags);
335 pr_debug("DSP power up request (audio codec %sinitialized)\n",
336 audio_ok ? "" : "not ");
344 spin_unlock_irqrestore(&audio_lock, flags);
346 eac_set_mode(eac_device, 1, 1);
351 int n800_audio_disable(struct dsp_kfunc_device *kdev, int stage)
357 spin_lock_irqsave(&audio_lock, flags);
359 pr_debug("DSP power down request (audio codec %sinitialized)\n",
360 audio_ok ? "" : "not ");
368 spin_unlock_irqrestore(&audio_lock, flags);
370 eac_set_mode(eac_device, 0, 0);
375 #endif /* CONFIG_OMAP_DSP */