Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 1 | /* |
| 2 | * tegra_asoc_utils.c - Harmony machine ASoC driver |
| 3 | * |
| 4 | * Author: Stephen Warren <swarren@nvidia.com> |
| 5 | * Copyright (C) 2010 - NVIDIA, Inc. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * version 2 as published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but |
| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| 19 | * 02110-1301 USA |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <linux/clk.h> |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 24 | #include <linux/device.h> |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 25 | #include <linux/err.h> |
| 26 | #include <linux/kernel.h> |
| 27 | |
| 28 | #include "tegra_asoc_utils.h" |
| 29 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 30 | int tegra_asoc_utils_set_rate(struct tegra_asoc_utils_data *data, int srate, |
| 31 | int mclk, int *mclk_change) |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 32 | { |
| 33 | int new_baseclock; |
| 34 | int err; |
| 35 | |
| 36 | switch (srate) { |
| 37 | case 11025: |
| 38 | case 22050: |
| 39 | case 44100: |
| 40 | case 88200: |
| 41 | new_baseclock = 56448000; |
| 42 | break; |
| 43 | case 8000: |
| 44 | case 16000: |
| 45 | case 32000: |
| 46 | case 48000: |
| 47 | case 64000: |
| 48 | case 96000: |
| 49 | new_baseclock = 73728000; |
| 50 | break; |
| 51 | default: |
| 52 | return -EINVAL; |
| 53 | } |
| 54 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 55 | *mclk_change = ((new_baseclock != data->set_baseclock) || |
| 56 | (mclk != data->set_mclk)); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 57 | if (!*mclk_change) |
| 58 | return 0; |
| 59 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 60 | data->set_baseclock = 0; |
| 61 | data->set_mclk = 0; |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 62 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 63 | clk_disable(data->clk_cdev1); |
| 64 | clk_disable(data->clk_pll_a_out0); |
| 65 | clk_disable(data->clk_pll_a); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 66 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 67 | err = clk_set_rate(data->clk_pll_a, new_baseclock); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 68 | if (err) { |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 69 | dev_err(data->dev, "Can't set pll_a rate: %d\n", err); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 70 | return err; |
| 71 | } |
| 72 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 73 | err = clk_set_rate(data->clk_pll_a_out0, mclk); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 74 | if (err) { |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 75 | dev_err(data->dev, "Can't set pll_a_out0 rate: %d\n", err); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 76 | return err; |
| 77 | } |
| 78 | |
| 79 | /* Don't set cdev1 rate; its locked to pll_a_out0 */ |
| 80 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 81 | err = clk_enable(data->clk_pll_a); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 82 | if (err) { |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 83 | dev_err(data->dev, "Can't enable pll_a: %d\n", err); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 84 | return err; |
| 85 | } |
| 86 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 87 | err = clk_enable(data->clk_pll_a_out0); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 88 | if (err) { |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 89 | dev_err(data->dev, "Can't enable pll_a_out0: %d\n", err); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 90 | return err; |
| 91 | } |
| 92 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 93 | err = clk_enable(data->clk_cdev1); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 94 | if (err) { |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 95 | dev_err(data->dev, "Can't enable cdev1: %d\n", err); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 96 | return err; |
| 97 | } |
| 98 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 99 | data->set_baseclock = new_baseclock; |
| 100 | data->set_mclk = mclk; |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 101 | |
| 102 | return 0; |
| 103 | } |
Stephen Warren | a3cd50d | 2011-02-22 17:23:56 -0700 | [diff] [blame] | 104 | EXPORT_SYMBOL_GPL(tegra_asoc_utils_set_rate); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 105 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 106 | int tegra_asoc_utils_init(struct tegra_asoc_utils_data *data, |
| 107 | struct device *dev) |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 108 | { |
| 109 | int ret; |
| 110 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 111 | data->dev = dev; |
| 112 | |
| 113 | data->clk_pll_a = clk_get_sys(NULL, "pll_a"); |
| 114 | if (IS_ERR(data->clk_pll_a)) { |
| 115 | dev_err(data->dev, "Can't retrieve clk pll_a\n"); |
| 116 | ret = PTR_ERR(data->clk_pll_a); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 117 | goto err; |
| 118 | } |
| 119 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 120 | data->clk_pll_a_out0 = clk_get_sys(NULL, "pll_a_out0"); |
| 121 | if (IS_ERR(data->clk_pll_a_out0)) { |
| 122 | dev_err(data->dev, "Can't retrieve clk pll_a_out0\n"); |
| 123 | ret = PTR_ERR(data->clk_pll_a_out0); |
Stephen Warren | 422650e | 2011-01-11 12:48:53 -0700 | [diff] [blame] | 124 | goto err_put_pll_a; |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 125 | } |
| 126 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 127 | data->clk_cdev1 = clk_get_sys(NULL, "cdev1"); |
| 128 | if (IS_ERR(data->clk_cdev1)) { |
| 129 | dev_err(data->dev, "Can't retrieve clk cdev1\n"); |
| 130 | ret = PTR_ERR(data->clk_cdev1); |
Stephen Warren | 422650e | 2011-01-11 12:48:53 -0700 | [diff] [blame] | 131 | goto err_put_pll_a_out0; |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | return 0; |
| 135 | |
Stephen Warren | 422650e | 2011-01-11 12:48:53 -0700 | [diff] [blame] | 136 | err_put_pll_a_out0: |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 137 | clk_put(data->clk_pll_a_out0); |
Stephen Warren | 422650e | 2011-01-11 12:48:53 -0700 | [diff] [blame] | 138 | err_put_pll_a: |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 139 | clk_put(data->clk_pll_a); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 140 | err: |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 141 | return ret; |
| 142 | } |
Stephen Warren | a3cd50d | 2011-02-22 17:23:56 -0700 | [diff] [blame] | 143 | EXPORT_SYMBOL_GPL(tegra_asoc_utils_init); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 144 | |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 145 | void tegra_asoc_utils_fini(struct tegra_asoc_utils_data *data) |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 146 | { |
Stephen Warren | d64e57c | 2011-01-28 14:26:40 -0700 | [diff] [blame] | 147 | clk_put(data->clk_cdev1); |
| 148 | clk_put(data->clk_pll_a_out0); |
| 149 | clk_put(data->clk_pll_a); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 150 | } |
Stephen Warren | a3cd50d | 2011-02-22 17:23:56 -0700 | [diff] [blame] | 151 | EXPORT_SYMBOL_GPL(tegra_asoc_utils_fini); |
Stephen Warren | a50a399 | 2011-01-07 22:36:15 -0700 | [diff] [blame] | 152 | |
Stephen Warren | a3cd50d | 2011-02-22 17:23:56 -0700 | [diff] [blame] | 153 | MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>"); |
| 154 | MODULE_DESCRIPTION("Tegra ASoC utility code"); |
| 155 | MODULE_LICENSE("GPL"); |